| 1 | /* Asynchronous subprocess control for GNU Emacs. |
| 2 | Copyright (C) 1985, 1986, 1987, 1988, 1993, 1994, 1995, |
| 3 | 1996, 1998, 1999, 2001, 2002, 2003, 2004, |
| 4 | 2005, 2006 Free Software Foundation, Inc. |
| 5 | |
| 6 | This file is part of GNU Emacs. |
| 7 | |
| 8 | GNU Emacs is free software; you can redistribute it and/or modify |
| 9 | it under the terms of the GNU General Public License as published by |
| 10 | the Free Software Foundation; either version 2, or (at your option) |
| 11 | any later version. |
| 12 | |
| 13 | GNU Emacs is distributed in the hope that it will be useful, |
| 14 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 15 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 16 | GNU General Public License for more details. |
| 17 | |
| 18 | You should have received a copy of the GNU General Public License |
| 19 | along with GNU Emacs; see the file COPYING. If not, write to |
| 20 | the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, |
| 21 | Boston, MA 02110-1301, USA. */ |
| 22 | |
| 23 | |
| 24 | #include <config.h> |
| 25 | #include <signal.h> |
| 26 | |
| 27 | /* This file is split into two parts by the following preprocessor |
| 28 | conditional. The 'then' clause contains all of the support for |
| 29 | asynchronous subprocesses. The 'else' clause contains stub |
| 30 | versions of some of the asynchronous subprocess routines that are |
| 31 | often called elsewhere in Emacs, so we don't have to #ifdef the |
| 32 | sections that call them. */ |
| 33 | |
| 34 | \f |
| 35 | #ifdef subprocesses |
| 36 | |
| 37 | #include <stdio.h> |
| 38 | #include <errno.h> |
| 39 | #include <setjmp.h> |
| 40 | #include <sys/types.h> /* some typedefs are used in sys/file.h */ |
| 41 | #include <sys/file.h> |
| 42 | #include <sys/stat.h> |
| 43 | #ifdef HAVE_INTTYPES_H |
| 44 | #include <inttypes.h> |
| 45 | #endif |
| 46 | #ifdef HAVE_UNISTD_H |
| 47 | #include <unistd.h> |
| 48 | #endif |
| 49 | |
| 50 | #if defined(WINDOWSNT) || defined(UNIX98_PTYS) |
| 51 | #include <stdlib.h> |
| 52 | #include <fcntl.h> |
| 53 | #endif /* not WINDOWSNT */ |
| 54 | |
| 55 | #ifdef HAVE_SOCKETS /* TCP connection support, if kernel can do it */ |
| 56 | #include <sys/socket.h> |
| 57 | #include <netdb.h> |
| 58 | #include <netinet/in.h> |
| 59 | #include <arpa/inet.h> |
| 60 | #ifdef NEED_NET_ERRNO_H |
| 61 | #include <net/errno.h> |
| 62 | #endif /* NEED_NET_ERRNO_H */ |
| 63 | |
| 64 | /* Are local (unix) sockets supported? */ |
| 65 | #if defined (HAVE_SYS_UN_H) && !defined (NO_SOCKETS_IN_FILE_SYSTEM) |
| 66 | #if !defined (AF_LOCAL) && defined (AF_UNIX) |
| 67 | #define AF_LOCAL AF_UNIX |
| 68 | #endif |
| 69 | #ifdef AF_LOCAL |
| 70 | #define HAVE_LOCAL_SOCKETS |
| 71 | #include <sys/un.h> |
| 72 | #endif |
| 73 | #endif |
| 74 | #endif /* HAVE_SOCKETS */ |
| 75 | |
| 76 | /* TERM is a poor-man's SLIP, used on GNU/Linux. */ |
| 77 | #ifdef TERM |
| 78 | #include <client.h> |
| 79 | #endif |
| 80 | |
| 81 | /* On some systems, e.g. DGUX, inet_addr returns a 'struct in_addr'. */ |
| 82 | #ifdef HAVE_BROKEN_INET_ADDR |
| 83 | #define IN_ADDR struct in_addr |
| 84 | #define NUMERIC_ADDR_ERROR (numeric_addr.s_addr == -1) |
| 85 | #else |
| 86 | #define IN_ADDR unsigned long |
| 87 | #define NUMERIC_ADDR_ERROR (numeric_addr == -1) |
| 88 | #endif |
| 89 | |
| 90 | #if defined(BSD_SYSTEM) || defined(STRIDE) |
| 91 | #include <sys/ioctl.h> |
| 92 | #if !defined (O_NDELAY) && defined (HAVE_PTYS) && !defined(USG5) |
| 93 | #include <fcntl.h> |
| 94 | #endif /* HAVE_PTYS and no O_NDELAY */ |
| 95 | #endif /* BSD_SYSTEM || STRIDE */ |
| 96 | |
| 97 | #ifdef BROKEN_O_NONBLOCK |
| 98 | #undef O_NONBLOCK |
| 99 | #endif /* BROKEN_O_NONBLOCK */ |
| 100 | |
| 101 | #ifdef NEED_BSDTTY |
| 102 | #include <bsdtty.h> |
| 103 | #endif |
| 104 | |
| 105 | /* Can we use SIOCGIFCONF and/or SIOCGIFADDR */ |
| 106 | #ifdef HAVE_SOCKETS |
| 107 | #if defined(HAVE_SYS_IOCTL_H) && defined(HAVE_NET_IF_H) |
| 108 | /* sys/ioctl.h may have been included already */ |
| 109 | #ifndef SIOCGIFADDR |
| 110 | #include <sys/ioctl.h> |
| 111 | #endif |
| 112 | #include <net/if.h> |
| 113 | #endif |
| 114 | #endif |
| 115 | |
| 116 | #ifdef IRIS |
| 117 | #include <sys/sysmacros.h> /* for "minor" */ |
| 118 | #endif /* not IRIS */ |
| 119 | |
| 120 | #ifdef HAVE_SYS_WAIT |
| 121 | #include <sys/wait.h> |
| 122 | #endif |
| 123 | |
| 124 | /* Disable IPv6 support for w32 until someone figures out how to do it |
| 125 | properly. */ |
| 126 | #ifdef WINDOWSNT |
| 127 | # ifdef AF_INET6 |
| 128 | # undef AF_INET6 |
| 129 | # endif |
| 130 | #endif |
| 131 | |
| 132 | #include "lisp.h" |
| 133 | #include "systime.h" |
| 134 | #include "systty.h" |
| 135 | |
| 136 | #include "window.h" |
| 137 | #include "buffer.h" |
| 138 | #include "charset.h" |
| 139 | #include "coding.h" |
| 140 | #include "process.h" |
| 141 | #include "termhooks.h" |
| 142 | #include "termopts.h" |
| 143 | #include "commands.h" |
| 144 | #include "keyboard.h" |
| 145 | #include "frame.h" |
| 146 | #include "blockinput.h" |
| 147 | #include "dispextern.h" |
| 148 | #include "composite.h" |
| 149 | #include "atimer.h" |
| 150 | |
| 151 | Lisp_Object Qprocessp; |
| 152 | Lisp_Object Qrun, Qstop, Qsignal; |
| 153 | Lisp_Object Qopen, Qclosed, Qconnect, Qfailed, Qlisten; |
| 154 | Lisp_Object Qlocal, Qipv4, Qdatagram; |
| 155 | #ifdef AF_INET6 |
| 156 | Lisp_Object Qipv6; |
| 157 | #endif |
| 158 | Lisp_Object QCname, QCbuffer, QChost, QCservice, QCtype; |
| 159 | Lisp_Object QClocal, QCremote, QCcoding; |
| 160 | Lisp_Object QCserver, QCnowait, QCnoquery, QCstop; |
| 161 | Lisp_Object QCsentinel, QClog, QCoptions, QCplist; |
| 162 | Lisp_Object QCfilter_multibyte; |
| 163 | Lisp_Object Qlast_nonmenu_event; |
| 164 | /* QCfamily is declared and initialized in xfaces.c, |
| 165 | QCfilter in keyboard.c. */ |
| 166 | extern Lisp_Object QCfamily, QCfilter; |
| 167 | |
| 168 | /* Qexit is declared and initialized in eval.c. */ |
| 169 | |
| 170 | /* QCfamily is defined in xfaces.c. */ |
| 171 | extern Lisp_Object QCfamily; |
| 172 | /* QCfilter is defined in keyboard.c. */ |
| 173 | extern Lisp_Object QCfilter; |
| 174 | |
| 175 | /* a process object is a network connection when its childp field is neither |
| 176 | Qt nor Qnil but is instead a property list (KEY VAL ...). */ |
| 177 | |
| 178 | #ifdef HAVE_SOCKETS |
| 179 | #define NETCONN_P(p) (GC_CONSP (XPROCESS (p)->childp)) |
| 180 | #define NETCONN1_P(p) (GC_CONSP ((p)->childp)) |
| 181 | #else |
| 182 | #define NETCONN_P(p) 0 |
| 183 | #define NETCONN1_P(p) 0 |
| 184 | #endif /* HAVE_SOCKETS */ |
| 185 | |
| 186 | /* Define first descriptor number available for subprocesses. */ |
| 187 | #ifdef VMS |
| 188 | #define FIRST_PROC_DESC 1 |
| 189 | #else /* Not VMS */ |
| 190 | #define FIRST_PROC_DESC 3 |
| 191 | #endif |
| 192 | |
| 193 | /* Define SIGCHLD as an alias for SIGCLD. There are many conditionals |
| 194 | testing SIGCHLD. */ |
| 195 | |
| 196 | #if !defined (SIGCHLD) && defined (SIGCLD) |
| 197 | #define SIGCHLD SIGCLD |
| 198 | #endif /* SIGCLD */ |
| 199 | |
| 200 | #include "syssignal.h" |
| 201 | |
| 202 | #include "syswait.h" |
| 203 | |
| 204 | extern char *get_operating_system_release (); |
| 205 | |
| 206 | #ifndef USE_CRT_DLL |
| 207 | extern int errno; |
| 208 | #endif |
| 209 | #ifdef VMS |
| 210 | extern char *sys_errlist[]; |
| 211 | #endif |
| 212 | |
| 213 | #ifndef HAVE_H_ERRNO |
| 214 | extern int h_errno; |
| 215 | #endif |
| 216 | |
| 217 | /* t means use pty, nil means use a pipe, |
| 218 | maybe other values to come. */ |
| 219 | static Lisp_Object Vprocess_connection_type; |
| 220 | |
| 221 | #ifdef SKTPAIR |
| 222 | #ifndef HAVE_SOCKETS |
| 223 | #include <sys/socket.h> |
| 224 | #endif |
| 225 | #endif /* SKTPAIR */ |
| 226 | |
| 227 | /* These next two vars are non-static since sysdep.c uses them in the |
| 228 | emulation of `select'. */ |
| 229 | /* Number of events of change of status of a process. */ |
| 230 | int process_tick; |
| 231 | /* Number of events for which the user or sentinel has been notified. */ |
| 232 | int update_tick; |
| 233 | |
| 234 | /* Define NON_BLOCKING_CONNECT if we can support non-blocking connects. */ |
| 235 | |
| 236 | #ifdef BROKEN_NON_BLOCKING_CONNECT |
| 237 | #undef NON_BLOCKING_CONNECT |
| 238 | #else |
| 239 | #ifndef NON_BLOCKING_CONNECT |
| 240 | #ifdef HAVE_SOCKETS |
| 241 | #ifdef HAVE_SELECT |
| 242 | #if defined (HAVE_GETPEERNAME) || defined (GNU_LINUX) |
| 243 | #if defined (O_NONBLOCK) || defined (O_NDELAY) |
| 244 | #if defined (EWOULDBLOCK) || defined (EINPROGRESS) |
| 245 | #define NON_BLOCKING_CONNECT |
| 246 | #endif /* EWOULDBLOCK || EINPROGRESS */ |
| 247 | #endif /* O_NONBLOCK || O_NDELAY */ |
| 248 | #endif /* HAVE_GETPEERNAME || GNU_LINUX */ |
| 249 | #endif /* HAVE_SELECT */ |
| 250 | #endif /* HAVE_SOCKETS */ |
| 251 | #endif /* NON_BLOCKING_CONNECT */ |
| 252 | #endif /* BROKEN_NON_BLOCKING_CONNECT */ |
| 253 | |
| 254 | /* Define DATAGRAM_SOCKETS if datagrams can be used safely on |
| 255 | this system. We need to read full packets, so we need a |
| 256 | "non-destructive" select. So we require either native select, |
| 257 | or emulation of select using FIONREAD. */ |
| 258 | |
| 259 | #ifdef BROKEN_DATAGRAM_SOCKETS |
| 260 | #undef DATAGRAM_SOCKETS |
| 261 | #else |
| 262 | #ifndef DATAGRAM_SOCKETS |
| 263 | #ifdef HAVE_SOCKETS |
| 264 | #if defined (HAVE_SELECT) || defined (FIONREAD) |
| 265 | #if defined (HAVE_SENDTO) && defined (HAVE_RECVFROM) && defined (EMSGSIZE) |
| 266 | #define DATAGRAM_SOCKETS |
| 267 | #endif /* HAVE_SENDTO && HAVE_RECVFROM && EMSGSIZE */ |
| 268 | #endif /* HAVE_SELECT || FIONREAD */ |
| 269 | #endif /* HAVE_SOCKETS */ |
| 270 | #endif /* DATAGRAM_SOCKETS */ |
| 271 | #endif /* BROKEN_DATAGRAM_SOCKETS */ |
| 272 | |
| 273 | #ifdef TERM |
| 274 | #undef NON_BLOCKING_CONNECT |
| 275 | #undef DATAGRAM_SOCKETS |
| 276 | #endif |
| 277 | |
| 278 | #if !defined (ADAPTIVE_READ_BUFFERING) && !defined (NO_ADAPTIVE_READ_BUFFERING) |
| 279 | #ifdef EMACS_HAS_USECS |
| 280 | #define ADAPTIVE_READ_BUFFERING |
| 281 | #endif |
| 282 | #endif |
| 283 | |
| 284 | #ifdef ADAPTIVE_READ_BUFFERING |
| 285 | #define READ_OUTPUT_DELAY_INCREMENT 10000 |
| 286 | #define READ_OUTPUT_DELAY_MAX (READ_OUTPUT_DELAY_INCREMENT * 5) |
| 287 | #define READ_OUTPUT_DELAY_MAX_MAX (READ_OUTPUT_DELAY_INCREMENT * 7) |
| 288 | |
| 289 | /* Number of processes which have a non-zero read_output_delay, |
| 290 | and therefore might be delayed for adaptive read buffering. */ |
| 291 | |
| 292 | static int process_output_delay_count; |
| 293 | |
| 294 | /* Non-zero if any process has non-nil read_output_skip. */ |
| 295 | |
| 296 | static int process_output_skip; |
| 297 | |
| 298 | /* Non-nil means to delay reading process output to improve buffering. |
| 299 | A value of t means that delay is reset after each send, any other |
| 300 | non-nil value does not reset the delay. A value of nil disables |
| 301 | adaptive read buffering completely. */ |
| 302 | static Lisp_Object Vprocess_adaptive_read_buffering; |
| 303 | #else |
| 304 | #define process_output_delay_count 0 |
| 305 | #endif |
| 306 | |
| 307 | |
| 308 | #include "sysselect.h" |
| 309 | |
| 310 | static int keyboard_bit_set P_ ((SELECT_TYPE *)); |
| 311 | static void deactivate_process P_ ((Lisp_Object)); |
| 312 | static void status_notify P_ ((struct Lisp_Process *)); |
| 313 | static int read_process_output P_ ((Lisp_Object, int)); |
| 314 | |
| 315 | /* If we support a window system, turn on the code to poll periodically |
| 316 | to detect C-g. It isn't actually used when doing interrupt input. */ |
| 317 | #ifdef HAVE_WINDOW_SYSTEM |
| 318 | #define POLL_FOR_INPUT |
| 319 | #endif |
| 320 | |
| 321 | /* Mask of bits indicating the descriptors that we wait for input on. */ |
| 322 | |
| 323 | static SELECT_TYPE input_wait_mask; |
| 324 | |
| 325 | /* Mask that excludes keyboard input descriptor (s). */ |
| 326 | |
| 327 | static SELECT_TYPE non_keyboard_wait_mask; |
| 328 | |
| 329 | /* Mask that excludes process input descriptor (s). */ |
| 330 | |
| 331 | static SELECT_TYPE non_process_wait_mask; |
| 332 | |
| 333 | #ifdef NON_BLOCKING_CONNECT |
| 334 | /* Mask of bits indicating the descriptors that we wait for connect to |
| 335 | complete on. Once they complete, they are removed from this mask |
| 336 | and added to the input_wait_mask and non_keyboard_wait_mask. */ |
| 337 | |
| 338 | static SELECT_TYPE connect_wait_mask; |
| 339 | |
| 340 | /* Number of bits set in connect_wait_mask. */ |
| 341 | static int num_pending_connects; |
| 342 | |
| 343 | #define IF_NON_BLOCKING_CONNECT(s) s |
| 344 | #else |
| 345 | #define IF_NON_BLOCKING_CONNECT(s) |
| 346 | #endif |
| 347 | |
| 348 | /* The largest descriptor currently in use for a process object. */ |
| 349 | static int max_process_desc; |
| 350 | |
| 351 | /* The largest descriptor currently in use for keyboard input. */ |
| 352 | static int max_keyboard_desc; |
| 353 | |
| 354 | /* Nonzero means delete a process right away if it exits. */ |
| 355 | static int delete_exited_processes; |
| 356 | |
| 357 | /* Indexed by descriptor, gives the process (if any) for that descriptor */ |
| 358 | Lisp_Object chan_process[MAXDESC]; |
| 359 | |
| 360 | /* Alist of elements (NAME . PROCESS) */ |
| 361 | Lisp_Object Vprocess_alist; |
| 362 | |
| 363 | /* Buffered-ahead input char from process, indexed by channel. |
| 364 | -1 means empty (no char is buffered). |
| 365 | Used on sys V where the only way to tell if there is any |
| 366 | output from the process is to read at least one char. |
| 367 | Always -1 on systems that support FIONREAD. */ |
| 368 | |
| 369 | /* Don't make static; need to access externally. */ |
| 370 | int proc_buffered_char[MAXDESC]; |
| 371 | |
| 372 | /* Table of `struct coding-system' for each process. */ |
| 373 | static struct coding_system *proc_decode_coding_system[MAXDESC]; |
| 374 | static struct coding_system *proc_encode_coding_system[MAXDESC]; |
| 375 | |
| 376 | #ifdef DATAGRAM_SOCKETS |
| 377 | /* Table of `partner address' for datagram sockets. */ |
| 378 | struct sockaddr_and_len { |
| 379 | struct sockaddr *sa; |
| 380 | int len; |
| 381 | } datagram_address[MAXDESC]; |
| 382 | #define DATAGRAM_CHAN_P(chan) (datagram_address[chan].sa != 0) |
| 383 | #define DATAGRAM_CONN_P(proc) (PROCESSP (proc) && datagram_address[XINT (XPROCESS (proc)->infd)].sa != 0) |
| 384 | #else |
| 385 | #define DATAGRAM_CHAN_P(chan) (0) |
| 386 | #define DATAGRAM_CONN_P(proc) (0) |
| 387 | #endif |
| 388 | |
| 389 | static Lisp_Object get_process (); |
| 390 | static void exec_sentinel (); |
| 391 | |
| 392 | extern EMACS_TIME timer_check (); |
| 393 | extern int timers_run; |
| 394 | |
| 395 | /* Maximum number of bytes to send to a pty without an eof. */ |
| 396 | static int pty_max_bytes; |
| 397 | |
| 398 | #ifdef HAVE_PTYS |
| 399 | #ifdef HAVE_PTY_H |
| 400 | #include <pty.h> |
| 401 | #endif |
| 402 | /* The file name of the pty opened by allocate_pty. */ |
| 403 | |
| 404 | static char pty_name[24]; |
| 405 | #endif |
| 406 | \f |
| 407 | /* Compute the Lisp form of the process status, p->status, from |
| 408 | the numeric status that was returned by `wait'. */ |
| 409 | |
| 410 | static Lisp_Object status_convert (); |
| 411 | |
| 412 | static void |
| 413 | update_status (p) |
| 414 | struct Lisp_Process *p; |
| 415 | { |
| 416 | union { int i; WAITTYPE wt; } u; |
| 417 | eassert (p->raw_status_new); |
| 418 | u.i = p->raw_status; |
| 419 | p->status = status_convert (u.wt); |
| 420 | p->raw_status_new = 0; |
| 421 | } |
| 422 | |
| 423 | /* Convert a process status word in Unix format to |
| 424 | the list that we use internally. */ |
| 425 | |
| 426 | static Lisp_Object |
| 427 | status_convert (w) |
| 428 | WAITTYPE w; |
| 429 | { |
| 430 | if (WIFSTOPPED (w)) |
| 431 | return Fcons (Qstop, Fcons (make_number (WSTOPSIG (w)), Qnil)); |
| 432 | else if (WIFEXITED (w)) |
| 433 | return Fcons (Qexit, Fcons (make_number (WRETCODE (w)), |
| 434 | WCOREDUMP (w) ? Qt : Qnil)); |
| 435 | else if (WIFSIGNALED (w)) |
| 436 | return Fcons (Qsignal, Fcons (make_number (WTERMSIG (w)), |
| 437 | WCOREDUMP (w) ? Qt : Qnil)); |
| 438 | else |
| 439 | return Qrun; |
| 440 | } |
| 441 | |
| 442 | /* Given a status-list, extract the three pieces of information |
| 443 | and store them individually through the three pointers. */ |
| 444 | |
| 445 | static void |
| 446 | decode_status (l, symbol, code, coredump) |
| 447 | Lisp_Object l; |
| 448 | Lisp_Object *symbol; |
| 449 | int *code; |
| 450 | int *coredump; |
| 451 | { |
| 452 | Lisp_Object tem; |
| 453 | |
| 454 | if (SYMBOLP (l)) |
| 455 | { |
| 456 | *symbol = l; |
| 457 | *code = 0; |
| 458 | *coredump = 0; |
| 459 | } |
| 460 | else |
| 461 | { |
| 462 | *symbol = XCAR (l); |
| 463 | tem = XCDR (l); |
| 464 | *code = XFASTINT (XCAR (tem)); |
| 465 | tem = XCDR (tem); |
| 466 | *coredump = !NILP (tem); |
| 467 | } |
| 468 | } |
| 469 | |
| 470 | /* Return a string describing a process status list. */ |
| 471 | |
| 472 | static Lisp_Object |
| 473 | status_message (p) |
| 474 | struct Lisp_Process *p; |
| 475 | { |
| 476 | Lisp_Object status = p->status; |
| 477 | Lisp_Object symbol; |
| 478 | int code, coredump; |
| 479 | Lisp_Object string, string2; |
| 480 | |
| 481 | decode_status (status, &symbol, &code, &coredump); |
| 482 | |
| 483 | if (EQ (symbol, Qsignal) || EQ (symbol, Qstop)) |
| 484 | { |
| 485 | char *signame; |
| 486 | synchronize_system_messages_locale (); |
| 487 | signame = strsignal (code); |
| 488 | if (signame == 0) |
| 489 | signame = "unknown"; |
| 490 | string = build_string (signame); |
| 491 | string2 = build_string (coredump ? " (core dumped)\n" : "\n"); |
| 492 | SSET (string, 0, DOWNCASE (SREF (string, 0))); |
| 493 | return concat2 (string, string2); |
| 494 | } |
| 495 | else if (EQ (symbol, Qexit)) |
| 496 | { |
| 497 | if (NETCONN1_P (p)) |
| 498 | return build_string (code == 0 ? "deleted\n" : "connection broken by remote peer\n"); |
| 499 | if (code == 0) |
| 500 | return build_string ("finished\n"); |
| 501 | string = Fnumber_to_string (make_number (code)); |
| 502 | string2 = build_string (coredump ? " (core dumped)\n" : "\n"); |
| 503 | return concat3 (build_string ("exited abnormally with code "), |
| 504 | string, string2); |
| 505 | } |
| 506 | else if (EQ (symbol, Qfailed)) |
| 507 | { |
| 508 | string = Fnumber_to_string (make_number (code)); |
| 509 | string2 = build_string ("\n"); |
| 510 | return concat3 (build_string ("failed with code "), |
| 511 | string, string2); |
| 512 | } |
| 513 | else |
| 514 | return Fcopy_sequence (Fsymbol_name (symbol)); |
| 515 | } |
| 516 | \f |
| 517 | #ifdef HAVE_PTYS |
| 518 | |
| 519 | /* Open an available pty, returning a file descriptor. |
| 520 | Return -1 on failure. |
| 521 | The file name of the terminal corresponding to the pty |
| 522 | is left in the variable pty_name. */ |
| 523 | |
| 524 | static int |
| 525 | allocate_pty () |
| 526 | { |
| 527 | register int c, i; |
| 528 | int fd; |
| 529 | |
| 530 | #ifdef PTY_ITERATION |
| 531 | PTY_ITERATION |
| 532 | #else |
| 533 | for (c = FIRST_PTY_LETTER; c <= 'z'; c++) |
| 534 | for (i = 0; i < 16; i++) |
| 535 | #endif |
| 536 | { |
| 537 | struct stat stb; /* Used in some PTY_OPEN. */ |
| 538 | #ifdef PTY_NAME_SPRINTF |
| 539 | PTY_NAME_SPRINTF |
| 540 | #else |
| 541 | sprintf (pty_name, "/dev/pty%c%x", c, i); |
| 542 | #endif /* no PTY_NAME_SPRINTF */ |
| 543 | |
| 544 | #ifdef PTY_OPEN |
| 545 | PTY_OPEN; |
| 546 | #else /* no PTY_OPEN */ |
| 547 | { |
| 548 | # ifdef IRIS |
| 549 | /* Unusual IRIS code */ |
| 550 | *ptyv = emacs_open ("/dev/ptc", O_RDWR | O_NDELAY, 0); |
| 551 | if (fd < 0) |
| 552 | return -1; |
| 553 | if (fstat (fd, &stb) < 0) |
| 554 | return -1; |
| 555 | # else /* not IRIS */ |
| 556 | { /* Some systems name their pseudoterminals so that there are gaps in |
| 557 | the usual sequence - for example, on HP9000/S700 systems, there |
| 558 | are no pseudoterminals with names ending in 'f'. So we wait for |
| 559 | three failures in a row before deciding that we've reached the |
| 560 | end of the ptys. */ |
| 561 | int failed_count = 0; |
| 562 | |
| 563 | if (stat (pty_name, &stb) < 0) |
| 564 | { |
| 565 | failed_count++; |
| 566 | if (failed_count >= 3) |
| 567 | return -1; |
| 568 | } |
| 569 | else |
| 570 | failed_count = 0; |
| 571 | } |
| 572 | # ifdef O_NONBLOCK |
| 573 | fd = emacs_open (pty_name, O_RDWR | O_NONBLOCK, 0); |
| 574 | # else |
| 575 | fd = emacs_open (pty_name, O_RDWR | O_NDELAY, 0); |
| 576 | # endif |
| 577 | # endif /* not IRIS */ |
| 578 | } |
| 579 | #endif /* no PTY_OPEN */ |
| 580 | |
| 581 | if (fd >= 0) |
| 582 | { |
| 583 | /* check to make certain that both sides are available |
| 584 | this avoids a nasty yet stupid bug in rlogins */ |
| 585 | #ifdef PTY_TTY_NAME_SPRINTF |
| 586 | PTY_TTY_NAME_SPRINTF |
| 587 | #else |
| 588 | sprintf (pty_name, "/dev/tty%c%x", c, i); |
| 589 | #endif /* no PTY_TTY_NAME_SPRINTF */ |
| 590 | #ifndef UNIPLUS |
| 591 | if (access (pty_name, 6) != 0) |
| 592 | { |
| 593 | emacs_close (fd); |
| 594 | # if !defined(IRIS) && !defined(__sgi) |
| 595 | continue; |
| 596 | # else |
| 597 | return -1; |
| 598 | # endif /* IRIS */ |
| 599 | } |
| 600 | #endif /* not UNIPLUS */ |
| 601 | setup_pty (fd); |
| 602 | return fd; |
| 603 | } |
| 604 | } |
| 605 | return -1; |
| 606 | } |
| 607 | #endif /* HAVE_PTYS */ |
| 608 | \f |
| 609 | static Lisp_Object |
| 610 | make_process (name) |
| 611 | Lisp_Object name; |
| 612 | { |
| 613 | register Lisp_Object val, tem, name1; |
| 614 | register struct Lisp_Process *p; |
| 615 | char suffix[10]; |
| 616 | register int i; |
| 617 | |
| 618 | p = allocate_process (); |
| 619 | |
| 620 | XSETINT (p->infd, -1); |
| 621 | XSETINT (p->outfd, -1); |
| 622 | XSETFASTINT (p->tick, 0); |
| 623 | XSETFASTINT (p->update_tick, 0); |
| 624 | p->pid = 0; |
| 625 | p->raw_status_new = 0; |
| 626 | p->status = Qrun; |
| 627 | p->mark = Fmake_marker (); |
| 628 | |
| 629 | #ifdef ADAPTIVE_READ_BUFFERING |
| 630 | p->adaptive_read_buffering = Qnil; |
| 631 | XSETFASTINT (p->read_output_delay, 0); |
| 632 | p->read_output_skip = Qnil; |
| 633 | #endif |
| 634 | |
| 635 | /* If name is already in use, modify it until it is unused. */ |
| 636 | |
| 637 | name1 = name; |
| 638 | for (i = 1; ; i++) |
| 639 | { |
| 640 | tem = Fget_process (name1); |
| 641 | if (NILP (tem)) break; |
| 642 | sprintf (suffix, "<%d>", i); |
| 643 | name1 = concat2 (name, build_string (suffix)); |
| 644 | } |
| 645 | name = name1; |
| 646 | p->name = name; |
| 647 | XSETPROCESS (val, p); |
| 648 | Vprocess_alist = Fcons (Fcons (name, val), Vprocess_alist); |
| 649 | return val; |
| 650 | } |
| 651 | |
| 652 | static void |
| 653 | remove_process (proc) |
| 654 | register Lisp_Object proc; |
| 655 | { |
| 656 | register Lisp_Object pair; |
| 657 | |
| 658 | pair = Frassq (proc, Vprocess_alist); |
| 659 | Vprocess_alist = Fdelq (pair, Vprocess_alist); |
| 660 | |
| 661 | deactivate_process (proc); |
| 662 | } |
| 663 | |
| 664 | /* Setup coding systems of PROCESS. */ |
| 665 | |
| 666 | void |
| 667 | setup_process_coding_systems (process) |
| 668 | Lisp_Object process; |
| 669 | { |
| 670 | struct Lisp_Process *p = XPROCESS (process); |
| 671 | int inch = XINT (p->infd); |
| 672 | int outch = XINT (p->outfd); |
| 673 | |
| 674 | if (inch < 0 || outch < 0) |
| 675 | return; |
| 676 | |
| 677 | if (!proc_decode_coding_system[inch]) |
| 678 | proc_decode_coding_system[inch] |
| 679 | = (struct coding_system *) xmalloc (sizeof (struct coding_system)); |
| 680 | setup_coding_system (p->decode_coding_system, |
| 681 | proc_decode_coding_system[inch]); |
| 682 | if (! NILP (p->filter)) |
| 683 | { |
| 684 | if (NILP (p->filter_multibyte)) |
| 685 | setup_raw_text_coding_system (proc_decode_coding_system[inch]); |
| 686 | } |
| 687 | else if (BUFFERP (p->buffer)) |
| 688 | { |
| 689 | if (NILP (XBUFFER (p->buffer)->enable_multibyte_characters)) |
| 690 | setup_raw_text_coding_system (proc_decode_coding_system[inch]); |
| 691 | } |
| 692 | |
| 693 | if (!proc_encode_coding_system[outch]) |
| 694 | proc_encode_coding_system[outch] |
| 695 | = (struct coding_system *) xmalloc (sizeof (struct coding_system)); |
| 696 | setup_coding_system (p->encode_coding_system, |
| 697 | proc_encode_coding_system[outch]); |
| 698 | if (proc_encode_coding_system[outch]->eol_type == CODING_EOL_UNDECIDED) |
| 699 | proc_encode_coding_system[outch]->eol_type = system_eol_type; |
| 700 | } |
| 701 | \f |
| 702 | DEFUN ("processp", Fprocessp, Sprocessp, 1, 1, 0, |
| 703 | doc: /* Return t if OBJECT is a process. */) |
| 704 | (object) |
| 705 | Lisp_Object object; |
| 706 | { |
| 707 | return PROCESSP (object) ? Qt : Qnil; |
| 708 | } |
| 709 | |
| 710 | DEFUN ("get-process", Fget_process, Sget_process, 1, 1, 0, |
| 711 | doc: /* Return the process named NAME, or nil if there is none. */) |
| 712 | (name) |
| 713 | register Lisp_Object name; |
| 714 | { |
| 715 | if (PROCESSP (name)) |
| 716 | return name; |
| 717 | CHECK_STRING (name); |
| 718 | return Fcdr (Fassoc (name, Vprocess_alist)); |
| 719 | } |
| 720 | |
| 721 | DEFUN ("get-buffer-process", Fget_buffer_process, Sget_buffer_process, 1, 1, 0, |
| 722 | doc: /* Return the (or a) process associated with BUFFER. |
| 723 | BUFFER may be a buffer or the name of one. */) |
| 724 | (buffer) |
| 725 | register Lisp_Object buffer; |
| 726 | { |
| 727 | register Lisp_Object buf, tail, proc; |
| 728 | |
| 729 | if (NILP (buffer)) return Qnil; |
| 730 | buf = Fget_buffer (buffer); |
| 731 | if (NILP (buf)) return Qnil; |
| 732 | |
| 733 | for (tail = Vprocess_alist; !NILP (tail); tail = Fcdr (tail)) |
| 734 | { |
| 735 | proc = Fcdr (Fcar (tail)); |
| 736 | if (PROCESSP (proc) && EQ (XPROCESS (proc)->buffer, buf)) |
| 737 | return proc; |
| 738 | } |
| 739 | return Qnil; |
| 740 | } |
| 741 | |
| 742 | /* This is how commands for the user decode process arguments. It |
| 743 | accepts a process, a process name, a buffer, a buffer name, or nil. |
| 744 | Buffers denote the first process in the buffer, and nil denotes the |
| 745 | current buffer. */ |
| 746 | |
| 747 | static Lisp_Object |
| 748 | get_process (name) |
| 749 | register Lisp_Object name; |
| 750 | { |
| 751 | register Lisp_Object proc, obj; |
| 752 | if (STRINGP (name)) |
| 753 | { |
| 754 | obj = Fget_process (name); |
| 755 | if (NILP (obj)) |
| 756 | obj = Fget_buffer (name); |
| 757 | if (NILP (obj)) |
| 758 | error ("Process %s does not exist", SDATA (name)); |
| 759 | } |
| 760 | else if (NILP (name)) |
| 761 | obj = Fcurrent_buffer (); |
| 762 | else |
| 763 | obj = name; |
| 764 | |
| 765 | /* Now obj should be either a buffer object or a process object. |
| 766 | */ |
| 767 | if (BUFFERP (obj)) |
| 768 | { |
| 769 | proc = Fget_buffer_process (obj); |
| 770 | if (NILP (proc)) |
| 771 | error ("Buffer %s has no process", SDATA (XBUFFER (obj)->name)); |
| 772 | } |
| 773 | else |
| 774 | { |
| 775 | CHECK_PROCESS (obj); |
| 776 | proc = obj; |
| 777 | } |
| 778 | return proc; |
| 779 | } |
| 780 | |
| 781 | |
| 782 | #ifdef SIGCHLD |
| 783 | /* Fdelete_process promises to immediately forget about the process, but in |
| 784 | reality, Emacs needs to remember those processes until they have been |
| 785 | treated by sigchld_handler; otherwise this handler would consider the |
| 786 | process as being synchronous and say that the synchronous process is |
| 787 | dead. */ |
| 788 | static Lisp_Object deleted_pid_list; |
| 789 | #endif |
| 790 | |
| 791 | DEFUN ("delete-process", Fdelete_process, Sdelete_process, 1, 1, 0, |
| 792 | doc: /* Delete PROCESS: kill it and forget about it immediately. |
| 793 | PROCESS may be a process, a buffer, the name of a process or buffer, or |
| 794 | nil, indicating the current buffer's process. */) |
| 795 | (process) |
| 796 | register Lisp_Object process; |
| 797 | { |
| 798 | register struct Lisp_Process *p; |
| 799 | |
| 800 | process = get_process (process); |
| 801 | p = XPROCESS (process); |
| 802 | |
| 803 | p->raw_status_new = 0; |
| 804 | if (NETCONN1_P (p)) |
| 805 | { |
| 806 | p->status = Fcons (Qexit, Fcons (make_number (0), Qnil)); |
| 807 | XSETINT (p->tick, ++process_tick); |
| 808 | status_notify (p); |
| 809 | } |
| 810 | else if (XINT (p->infd) >= 0) |
| 811 | { |
| 812 | #ifdef SIGCHLD |
| 813 | Lisp_Object symbol; |
| 814 | |
| 815 | /* No problem storing the pid here, as it is still in Vprocess_alist. */ |
| 816 | deleted_pid_list = Fcons (make_fixnum_or_float (p->pid), |
| 817 | /* GC treated elements set to nil. */ |
| 818 | Fdelq (Qnil, deleted_pid_list)); |
| 819 | /* If the process has already signaled, remove it from the list. */ |
| 820 | if (p->raw_status_new) |
| 821 | update_status (p); |
| 822 | symbol = p->status; |
| 823 | if (CONSP (p->status)) |
| 824 | symbol = XCAR (p->status); |
| 825 | if (EQ (symbol, Qsignal) || EQ (symbol, Qexit)) |
| 826 | Fdelete (make_fixnum_or_float (p->pid), deleted_pid_list); |
| 827 | else |
| 828 | #endif |
| 829 | { |
| 830 | Fkill_process (process, Qnil); |
| 831 | /* Do this now, since remove_process will make sigchld_handler do nothing. */ |
| 832 | p->status |
| 833 | = Fcons (Qsignal, Fcons (make_number (SIGKILL), Qnil)); |
| 834 | XSETINT (p->tick, ++process_tick); |
| 835 | status_notify (p); |
| 836 | } |
| 837 | } |
| 838 | remove_process (process); |
| 839 | return Qnil; |
| 840 | } |
| 841 | \f |
| 842 | DEFUN ("process-status", Fprocess_status, Sprocess_status, 1, 1, 0, |
| 843 | doc: /* Return the status of PROCESS. |
| 844 | The returned value is one of the following symbols: |
| 845 | run -- for a process that is running. |
| 846 | stop -- for a process stopped but continuable. |
| 847 | exit -- for a process that has exited. |
| 848 | signal -- for a process that has got a fatal signal. |
| 849 | open -- for a network stream connection that is open. |
| 850 | listen -- for a network stream server that is listening. |
| 851 | closed -- for a network stream connection that is closed. |
| 852 | connect -- when waiting for a non-blocking connection to complete. |
| 853 | failed -- when a non-blocking connection has failed. |
| 854 | nil -- if arg is a process name and no such process exists. |
| 855 | PROCESS may be a process, a buffer, the name of a process, or |
| 856 | nil, indicating the current buffer's process. */) |
| 857 | (process) |
| 858 | register Lisp_Object process; |
| 859 | { |
| 860 | register struct Lisp_Process *p; |
| 861 | register Lisp_Object status; |
| 862 | |
| 863 | if (STRINGP (process)) |
| 864 | process = Fget_process (process); |
| 865 | else |
| 866 | process = get_process (process); |
| 867 | |
| 868 | if (NILP (process)) |
| 869 | return process; |
| 870 | |
| 871 | p = XPROCESS (process); |
| 872 | if (p->raw_status_new) |
| 873 | update_status (p); |
| 874 | status = p->status; |
| 875 | if (CONSP (status)) |
| 876 | status = XCAR (status); |
| 877 | if (NETCONN1_P (p)) |
| 878 | { |
| 879 | if (EQ (status, Qexit)) |
| 880 | status = Qclosed; |
| 881 | else if (EQ (p->command, Qt)) |
| 882 | status = Qstop; |
| 883 | else if (EQ (status, Qrun)) |
| 884 | status = Qopen; |
| 885 | } |
| 886 | return status; |
| 887 | } |
| 888 | |
| 889 | DEFUN ("process-exit-status", Fprocess_exit_status, Sprocess_exit_status, |
| 890 | 1, 1, 0, |
| 891 | doc: /* Return the exit status of PROCESS or the signal number that killed it. |
| 892 | If PROCESS has not yet exited or died, return 0. */) |
| 893 | (process) |
| 894 | register Lisp_Object process; |
| 895 | { |
| 896 | CHECK_PROCESS (process); |
| 897 | if (XPROCESS (process)->raw_status_new) |
| 898 | update_status (XPROCESS (process)); |
| 899 | if (CONSP (XPROCESS (process)->status)) |
| 900 | return XCAR (XCDR (XPROCESS (process)->status)); |
| 901 | return make_number (0); |
| 902 | } |
| 903 | |
| 904 | DEFUN ("process-id", Fprocess_id, Sprocess_id, 1, 1, 0, |
| 905 | doc: /* Return the process id of PROCESS. |
| 906 | This is the pid of the external process which PROCESS uses or talks to. |
| 907 | For a network connection, this value is nil. */) |
| 908 | (process) |
| 909 | register Lisp_Object process; |
| 910 | { |
| 911 | CHECK_PROCESS (process); |
| 912 | return (XPROCESS (process)->pid |
| 913 | ? make_fixnum_or_float (XPROCESS (process)->pid) |
| 914 | : Qnil); |
| 915 | } |
| 916 | |
| 917 | DEFUN ("process-name", Fprocess_name, Sprocess_name, 1, 1, 0, |
| 918 | doc: /* Return the name of PROCESS, as a string. |
| 919 | This is the name of the program invoked in PROCESS, |
| 920 | possibly modified to make it unique among process names. */) |
| 921 | (process) |
| 922 | register Lisp_Object process; |
| 923 | { |
| 924 | CHECK_PROCESS (process); |
| 925 | return XPROCESS (process)->name; |
| 926 | } |
| 927 | |
| 928 | DEFUN ("process-command", Fprocess_command, Sprocess_command, 1, 1, 0, |
| 929 | doc: /* Return the command that was executed to start PROCESS. |
| 930 | This is a list of strings, the first string being the program executed |
| 931 | and the rest of the strings being the arguments given to it. |
| 932 | For a non-child channel, this is nil. */) |
| 933 | (process) |
| 934 | register Lisp_Object process; |
| 935 | { |
| 936 | CHECK_PROCESS (process); |
| 937 | return XPROCESS (process)->command; |
| 938 | } |
| 939 | |
| 940 | DEFUN ("process-tty-name", Fprocess_tty_name, Sprocess_tty_name, 1, 1, 0, |
| 941 | doc: /* Return the name of the terminal PROCESS uses, or nil if none. |
| 942 | This is the terminal that the process itself reads and writes on, |
| 943 | not the name of the pty that Emacs uses to talk with that terminal. */) |
| 944 | (process) |
| 945 | register Lisp_Object process; |
| 946 | { |
| 947 | CHECK_PROCESS (process); |
| 948 | return XPROCESS (process)->tty_name; |
| 949 | } |
| 950 | |
| 951 | DEFUN ("set-process-buffer", Fset_process_buffer, Sset_process_buffer, |
| 952 | 2, 2, 0, |
| 953 | doc: /* Set buffer associated with PROCESS to BUFFER (a buffer, or nil). */) |
| 954 | (process, buffer) |
| 955 | register Lisp_Object process, buffer; |
| 956 | { |
| 957 | struct Lisp_Process *p; |
| 958 | |
| 959 | CHECK_PROCESS (process); |
| 960 | if (!NILP (buffer)) |
| 961 | CHECK_BUFFER (buffer); |
| 962 | p = XPROCESS (process); |
| 963 | p->buffer = buffer; |
| 964 | if (NETCONN1_P (p)) |
| 965 | p->childp = Fplist_put (p->childp, QCbuffer, buffer); |
| 966 | setup_process_coding_systems (process); |
| 967 | return buffer; |
| 968 | } |
| 969 | |
| 970 | DEFUN ("process-buffer", Fprocess_buffer, Sprocess_buffer, |
| 971 | 1, 1, 0, |
| 972 | doc: /* Return the buffer PROCESS is associated with. |
| 973 | Output from PROCESS is inserted in this buffer unless PROCESS has a filter. */) |
| 974 | (process) |
| 975 | register Lisp_Object process; |
| 976 | { |
| 977 | CHECK_PROCESS (process); |
| 978 | return XPROCESS (process)->buffer; |
| 979 | } |
| 980 | |
| 981 | DEFUN ("process-mark", Fprocess_mark, Sprocess_mark, |
| 982 | 1, 1, 0, |
| 983 | doc: /* Return the marker for the end of the last output from PROCESS. */) |
| 984 | (process) |
| 985 | register Lisp_Object process; |
| 986 | { |
| 987 | CHECK_PROCESS (process); |
| 988 | return XPROCESS (process)->mark; |
| 989 | } |
| 990 | |
| 991 | DEFUN ("set-process-filter", Fset_process_filter, Sset_process_filter, |
| 992 | 2, 2, 0, |
| 993 | doc: /* Give PROCESS the filter function FILTER; nil means no filter. |
| 994 | t means stop accepting output from the process. |
| 995 | |
| 996 | When a process has a filter, its buffer is not used for output. |
| 997 | Instead, each time it does output, the entire string of output is |
| 998 | passed to the filter. |
| 999 | |
| 1000 | The filter gets two arguments: the process and the string of output. |
| 1001 | The string argument is normally a multibyte string, except: |
| 1002 | - if the process' input coding system is no-conversion or raw-text, |
| 1003 | it is a unibyte string (the non-converted input), or else |
| 1004 | - if `default-enable-multibyte-characters' is nil, it is a unibyte |
| 1005 | string (the result of converting the decoded input multibyte |
| 1006 | string to unibyte with `string-make-unibyte'). */) |
| 1007 | (process, filter) |
| 1008 | register Lisp_Object process, filter; |
| 1009 | { |
| 1010 | struct Lisp_Process *p; |
| 1011 | |
| 1012 | CHECK_PROCESS (process); |
| 1013 | p = XPROCESS (process); |
| 1014 | |
| 1015 | /* Don't signal an error if the process' input file descriptor |
| 1016 | is closed. This could make debugging Lisp more difficult, |
| 1017 | for example when doing something like |
| 1018 | |
| 1019 | (setq process (start-process ...)) |
| 1020 | (debug) |
| 1021 | (set-process-filter process ...) */ |
| 1022 | |
| 1023 | if (XINT (p->infd) >= 0) |
| 1024 | { |
| 1025 | if (EQ (filter, Qt) && !EQ (p->status, Qlisten)) |
| 1026 | { |
| 1027 | FD_CLR (XINT (p->infd), &input_wait_mask); |
| 1028 | FD_CLR (XINT (p->infd), &non_keyboard_wait_mask); |
| 1029 | } |
| 1030 | else if (EQ (p->filter, Qt) |
| 1031 | && !EQ (p->command, Qt)) /* Network process not stopped. */ |
| 1032 | { |
| 1033 | FD_SET (XINT (p->infd), &input_wait_mask); |
| 1034 | FD_SET (XINT (p->infd), &non_keyboard_wait_mask); |
| 1035 | } |
| 1036 | } |
| 1037 | |
| 1038 | p->filter = filter; |
| 1039 | if (NETCONN1_P (p)) |
| 1040 | p->childp = Fplist_put (p->childp, QCfilter, filter); |
| 1041 | setup_process_coding_systems (process); |
| 1042 | return filter; |
| 1043 | } |
| 1044 | |
| 1045 | DEFUN ("process-filter", Fprocess_filter, Sprocess_filter, |
| 1046 | 1, 1, 0, |
| 1047 | doc: /* Returns the filter function of PROCESS; nil if none. |
| 1048 | See `set-process-filter' for more info on filter functions. */) |
| 1049 | (process) |
| 1050 | register Lisp_Object process; |
| 1051 | { |
| 1052 | CHECK_PROCESS (process); |
| 1053 | return XPROCESS (process)->filter; |
| 1054 | } |
| 1055 | |
| 1056 | DEFUN ("set-process-sentinel", Fset_process_sentinel, Sset_process_sentinel, |
| 1057 | 2, 2, 0, |
| 1058 | doc: /* Give PROCESS the sentinel SENTINEL; nil for none. |
| 1059 | The sentinel is called as a function when the process changes state. |
| 1060 | It gets two arguments: the process, and a string describing the change. */) |
| 1061 | (process, sentinel) |
| 1062 | register Lisp_Object process, sentinel; |
| 1063 | { |
| 1064 | struct Lisp_Process *p; |
| 1065 | |
| 1066 | CHECK_PROCESS (process); |
| 1067 | p = XPROCESS (process); |
| 1068 | |
| 1069 | p->sentinel = sentinel; |
| 1070 | if (NETCONN1_P (p)) |
| 1071 | p->childp = Fplist_put (p->childp, QCsentinel, sentinel); |
| 1072 | return sentinel; |
| 1073 | } |
| 1074 | |
| 1075 | DEFUN ("process-sentinel", Fprocess_sentinel, Sprocess_sentinel, |
| 1076 | 1, 1, 0, |
| 1077 | doc: /* Return the sentinel of PROCESS; nil if none. |
| 1078 | See `set-process-sentinel' for more info on sentinels. */) |
| 1079 | (process) |
| 1080 | register Lisp_Object process; |
| 1081 | { |
| 1082 | CHECK_PROCESS (process); |
| 1083 | return XPROCESS (process)->sentinel; |
| 1084 | } |
| 1085 | |
| 1086 | DEFUN ("set-process-window-size", Fset_process_window_size, |
| 1087 | Sset_process_window_size, 3, 3, 0, |
| 1088 | doc: /* Tell PROCESS that it has logical window size HEIGHT and WIDTH. */) |
| 1089 | (process, height, width) |
| 1090 | register Lisp_Object process, height, width; |
| 1091 | { |
| 1092 | CHECK_PROCESS (process); |
| 1093 | CHECK_NATNUM (height); |
| 1094 | CHECK_NATNUM (width); |
| 1095 | |
| 1096 | if (XINT (XPROCESS (process)->infd) < 0 |
| 1097 | || set_window_size (XINT (XPROCESS (process)->infd), |
| 1098 | XINT (height), XINT (width)) <= 0) |
| 1099 | return Qnil; |
| 1100 | else |
| 1101 | return Qt; |
| 1102 | } |
| 1103 | |
| 1104 | DEFUN ("set-process-inherit-coding-system-flag", |
| 1105 | Fset_process_inherit_coding_system_flag, |
| 1106 | Sset_process_inherit_coding_system_flag, 2, 2, 0, |
| 1107 | doc: /* Determine whether buffer of PROCESS will inherit coding-system. |
| 1108 | If the second argument FLAG is non-nil, then the variable |
| 1109 | `buffer-file-coding-system' of the buffer associated with PROCESS |
| 1110 | will be bound to the value of the coding system used to decode |
| 1111 | the process output. |
| 1112 | |
| 1113 | This is useful when the coding system specified for the process buffer |
| 1114 | leaves either the character code conversion or the end-of-line conversion |
| 1115 | unspecified, or if the coding system used to decode the process output |
| 1116 | is more appropriate for saving the process buffer. |
| 1117 | |
| 1118 | Binding the variable `inherit-process-coding-system' to non-nil before |
| 1119 | starting the process is an alternative way of setting the inherit flag |
| 1120 | for the process which will run. */) |
| 1121 | (process, flag) |
| 1122 | register Lisp_Object process, flag; |
| 1123 | { |
| 1124 | CHECK_PROCESS (process); |
| 1125 | XPROCESS (process)->inherit_coding_system_flag = flag; |
| 1126 | return flag; |
| 1127 | } |
| 1128 | |
| 1129 | DEFUN ("process-inherit-coding-system-flag", |
| 1130 | Fprocess_inherit_coding_system_flag, Sprocess_inherit_coding_system_flag, |
| 1131 | 1, 1, 0, |
| 1132 | doc: /* Return the value of inherit-coding-system flag for PROCESS. |
| 1133 | If this flag is t, `buffer-file-coding-system' of the buffer |
| 1134 | associated with PROCESS will inherit the coding system used to decode |
| 1135 | the process output. */) |
| 1136 | (process) |
| 1137 | register Lisp_Object process; |
| 1138 | { |
| 1139 | CHECK_PROCESS (process); |
| 1140 | return XPROCESS (process)->inherit_coding_system_flag; |
| 1141 | } |
| 1142 | |
| 1143 | DEFUN ("set-process-query-on-exit-flag", |
| 1144 | Fset_process_query_on_exit_flag, Sset_process_query_on_exit_flag, |
| 1145 | 2, 2, 0, |
| 1146 | doc: /* Specify if query is needed for PROCESS when Emacs is exited. |
| 1147 | If the second argument FLAG is non-nil, Emacs will query the user before |
| 1148 | exiting if PROCESS is running. */) |
| 1149 | (process, flag) |
| 1150 | register Lisp_Object process, flag; |
| 1151 | { |
| 1152 | CHECK_PROCESS (process); |
| 1153 | XPROCESS (process)->kill_without_query = Fnull (flag); |
| 1154 | return flag; |
| 1155 | } |
| 1156 | |
| 1157 | DEFUN ("process-query-on-exit-flag", |
| 1158 | Fprocess_query_on_exit_flag, Sprocess_query_on_exit_flag, |
| 1159 | 1, 1, 0, |
| 1160 | doc: /* Return the current value of query-on-exit flag for PROCESS. */) |
| 1161 | (process) |
| 1162 | register Lisp_Object process; |
| 1163 | { |
| 1164 | CHECK_PROCESS (process); |
| 1165 | return Fnull (XPROCESS (process)->kill_without_query); |
| 1166 | } |
| 1167 | |
| 1168 | #ifdef DATAGRAM_SOCKETS |
| 1169 | Lisp_Object Fprocess_datagram_address (); |
| 1170 | #endif |
| 1171 | |
| 1172 | DEFUN ("process-contact", Fprocess_contact, Sprocess_contact, |
| 1173 | 1, 2, 0, |
| 1174 | doc: /* Return the contact info of PROCESS; t for a real child. |
| 1175 | For a net connection, the value depends on the optional KEY arg. |
| 1176 | If KEY is nil, value is a cons cell of the form (HOST SERVICE), |
| 1177 | if KEY is t, the complete contact information for the connection is |
| 1178 | returned, else the specific value for the keyword KEY is returned. |
| 1179 | See `make-network-process' for a list of keywords. */) |
| 1180 | (process, key) |
| 1181 | register Lisp_Object process, key; |
| 1182 | { |
| 1183 | Lisp_Object contact; |
| 1184 | |
| 1185 | CHECK_PROCESS (process); |
| 1186 | contact = XPROCESS (process)->childp; |
| 1187 | |
| 1188 | #ifdef DATAGRAM_SOCKETS |
| 1189 | if (DATAGRAM_CONN_P (process) |
| 1190 | && (EQ (key, Qt) || EQ (key, QCremote))) |
| 1191 | contact = Fplist_put (contact, QCremote, |
| 1192 | Fprocess_datagram_address (process)); |
| 1193 | #endif |
| 1194 | |
| 1195 | if (!NETCONN_P (process) || EQ (key, Qt)) |
| 1196 | return contact; |
| 1197 | if (NILP (key)) |
| 1198 | return Fcons (Fplist_get (contact, QChost), |
| 1199 | Fcons (Fplist_get (contact, QCservice), Qnil)); |
| 1200 | return Fplist_get (contact, key); |
| 1201 | } |
| 1202 | |
| 1203 | DEFUN ("process-plist", Fprocess_plist, Sprocess_plist, |
| 1204 | 1, 1, 0, |
| 1205 | doc: /* Return the plist of PROCESS. */) |
| 1206 | (process) |
| 1207 | register Lisp_Object process; |
| 1208 | { |
| 1209 | CHECK_PROCESS (process); |
| 1210 | return XPROCESS (process)->plist; |
| 1211 | } |
| 1212 | |
| 1213 | DEFUN ("set-process-plist", Fset_process_plist, Sset_process_plist, |
| 1214 | 2, 2, 0, |
| 1215 | doc: /* Replace the plist of PROCESS with PLIST. Returns PLIST. */) |
| 1216 | (process, plist) |
| 1217 | register Lisp_Object process, plist; |
| 1218 | { |
| 1219 | CHECK_PROCESS (process); |
| 1220 | CHECK_LIST (plist); |
| 1221 | |
| 1222 | XPROCESS (process)->plist = plist; |
| 1223 | return plist; |
| 1224 | } |
| 1225 | |
| 1226 | #if 0 /* Turned off because we don't currently record this info |
| 1227 | in the process. Perhaps add it. */ |
| 1228 | DEFUN ("process-connection", Fprocess_connection, Sprocess_connection, 1, 1, 0, |
| 1229 | doc: /* Return the connection type of PROCESS. |
| 1230 | The value is nil for a pipe, t or `pty' for a pty, or `stream' for |
| 1231 | a socket connection. */) |
| 1232 | (process) |
| 1233 | Lisp_Object process; |
| 1234 | { |
| 1235 | return XPROCESS (process)->type; |
| 1236 | } |
| 1237 | #endif |
| 1238 | |
| 1239 | #ifdef HAVE_SOCKETS |
| 1240 | DEFUN ("format-network-address", Fformat_network_address, Sformat_network_address, |
| 1241 | 1, 2, 0, |
| 1242 | doc: /* Convert network ADDRESS from internal format to a string. |
| 1243 | A 4 or 5 element vector represents an IPv4 address (with port number). |
| 1244 | An 8 or 9 element vector represents an IPv6 address (with port number). |
| 1245 | If optional second argument OMIT-PORT is non-nil, don't include a port |
| 1246 | number in the string, even when present in ADDRESS. |
| 1247 | Returns nil if format of ADDRESS is invalid. */) |
| 1248 | (address, omit_port) |
| 1249 | Lisp_Object address, omit_port; |
| 1250 | { |
| 1251 | if (NILP (address)) |
| 1252 | return Qnil; |
| 1253 | |
| 1254 | if (STRINGP (address)) /* AF_LOCAL */ |
| 1255 | return address; |
| 1256 | |
| 1257 | if (VECTORP (address)) /* AF_INET or AF_INET6 */ |
| 1258 | { |
| 1259 | register struct Lisp_Vector *p = XVECTOR (address); |
| 1260 | Lisp_Object args[6]; |
| 1261 | int nargs, i; |
| 1262 | |
| 1263 | if (p->size == 4 || (p->size == 5 && !NILP (omit_port))) |
| 1264 | { |
| 1265 | args[0] = build_string ("%d.%d.%d.%d"); |
| 1266 | nargs = 4; |
| 1267 | } |
| 1268 | else if (p->size == 5) |
| 1269 | { |
| 1270 | args[0] = build_string ("%d.%d.%d.%d:%d"); |
| 1271 | nargs = 5; |
| 1272 | } |
| 1273 | else if (p->size == 8 || (p->size == 9 && !NILP (omit_port))) |
| 1274 | { |
| 1275 | args[0] = build_string ("%x:%x:%x:%x:%x:%x:%x:%x"); |
| 1276 | nargs = 8; |
| 1277 | } |
| 1278 | else if (p->size == 9) |
| 1279 | { |
| 1280 | args[0] = build_string ("[%x:%x:%x:%x:%x:%x:%x:%x]:%d"); |
| 1281 | nargs = 9; |
| 1282 | } |
| 1283 | else |
| 1284 | return Qnil; |
| 1285 | |
| 1286 | for (i = 0; i < nargs; i++) |
| 1287 | args[i+1] = p->contents[i]; |
| 1288 | return Fformat (nargs+1, args); |
| 1289 | } |
| 1290 | |
| 1291 | if (CONSP (address)) |
| 1292 | { |
| 1293 | Lisp_Object args[2]; |
| 1294 | args[0] = build_string ("<Family %d>"); |
| 1295 | args[1] = Fcar (address); |
| 1296 | return Fformat (2, args); |
| 1297 | |
| 1298 | } |
| 1299 | |
| 1300 | return Qnil; |
| 1301 | } |
| 1302 | #endif |
| 1303 | \f |
| 1304 | static Lisp_Object |
| 1305 | list_processes_1 (query_only) |
| 1306 | Lisp_Object query_only; |
| 1307 | { |
| 1308 | register Lisp_Object tail, tem; |
| 1309 | Lisp_Object proc, minspace, tem1; |
| 1310 | register struct Lisp_Process *p; |
| 1311 | char tembuf[300]; |
| 1312 | int w_proc, w_buffer, w_tty; |
| 1313 | Lisp_Object i_status, i_buffer, i_tty, i_command; |
| 1314 | |
| 1315 | w_proc = 4; /* Proc */ |
| 1316 | w_buffer = 6; /* Buffer */ |
| 1317 | w_tty = 0; /* Omit if no ttys */ |
| 1318 | |
| 1319 | for (tail = Vprocess_alist; !NILP (tail); tail = Fcdr (tail)) |
| 1320 | { |
| 1321 | int i; |
| 1322 | |
| 1323 | proc = Fcdr (Fcar (tail)); |
| 1324 | p = XPROCESS (proc); |
| 1325 | if (NILP (p->childp)) |
| 1326 | continue; |
| 1327 | if (!NILP (query_only) && !NILP (p->kill_without_query)) |
| 1328 | continue; |
| 1329 | if (STRINGP (p->name) |
| 1330 | && ( i = SCHARS (p->name), (i > w_proc))) |
| 1331 | w_proc = i; |
| 1332 | if (!NILP (p->buffer)) |
| 1333 | { |
| 1334 | if (NILP (XBUFFER (p->buffer)->name) && w_buffer < 8) |
| 1335 | w_buffer = 8; /* (Killed) */ |
| 1336 | else if ((i = SCHARS (XBUFFER (p->buffer)->name), (i > w_buffer))) |
| 1337 | w_buffer = i; |
| 1338 | } |
| 1339 | if (STRINGP (p->tty_name) |
| 1340 | && (i = SCHARS (p->tty_name), (i > w_tty))) |
| 1341 | w_tty = i; |
| 1342 | } |
| 1343 | |
| 1344 | XSETFASTINT (i_status, w_proc + 1); |
| 1345 | XSETFASTINT (i_buffer, XFASTINT (i_status) + 9); |
| 1346 | if (w_tty) |
| 1347 | { |
| 1348 | XSETFASTINT (i_tty, XFASTINT (i_buffer) + w_buffer + 1); |
| 1349 | XSETFASTINT (i_command, XFASTINT (i_buffer) + w_tty + 1); |
| 1350 | } else { |
| 1351 | i_tty = Qnil; |
| 1352 | XSETFASTINT (i_command, XFASTINT (i_buffer) + w_buffer + 1); |
| 1353 | } |
| 1354 | |
| 1355 | XSETFASTINT (minspace, 1); |
| 1356 | |
| 1357 | set_buffer_internal (XBUFFER (Vstandard_output)); |
| 1358 | current_buffer->undo_list = Qt; |
| 1359 | |
| 1360 | current_buffer->truncate_lines = Qt; |
| 1361 | |
| 1362 | write_string ("Proc", -1); |
| 1363 | Findent_to (i_status, minspace); write_string ("Status", -1); |
| 1364 | Findent_to (i_buffer, minspace); write_string ("Buffer", -1); |
| 1365 | if (!NILP (i_tty)) |
| 1366 | { |
| 1367 | Findent_to (i_tty, minspace); write_string ("Tty", -1); |
| 1368 | } |
| 1369 | Findent_to (i_command, minspace); write_string ("Command", -1); |
| 1370 | write_string ("\n", -1); |
| 1371 | |
| 1372 | write_string ("----", -1); |
| 1373 | Findent_to (i_status, minspace); write_string ("------", -1); |
| 1374 | Findent_to (i_buffer, minspace); write_string ("------", -1); |
| 1375 | if (!NILP (i_tty)) |
| 1376 | { |
| 1377 | Findent_to (i_tty, minspace); write_string ("---", -1); |
| 1378 | } |
| 1379 | Findent_to (i_command, minspace); write_string ("-------", -1); |
| 1380 | write_string ("\n", -1); |
| 1381 | |
| 1382 | for (tail = Vprocess_alist; !NILP (tail); tail = Fcdr (tail)) |
| 1383 | { |
| 1384 | Lisp_Object symbol; |
| 1385 | |
| 1386 | proc = Fcdr (Fcar (tail)); |
| 1387 | p = XPROCESS (proc); |
| 1388 | if (NILP (p->childp)) |
| 1389 | continue; |
| 1390 | if (!NILP (query_only) && !NILP (p->kill_without_query)) |
| 1391 | continue; |
| 1392 | |
| 1393 | Finsert (1, &p->name); |
| 1394 | Findent_to (i_status, minspace); |
| 1395 | |
| 1396 | if (p->raw_status_new) |
| 1397 | update_status (p); |
| 1398 | symbol = p->status; |
| 1399 | if (CONSP (p->status)) |
| 1400 | symbol = XCAR (p->status); |
| 1401 | |
| 1402 | |
| 1403 | if (EQ (symbol, Qsignal)) |
| 1404 | { |
| 1405 | Lisp_Object tem; |
| 1406 | tem = Fcar (Fcdr (p->status)); |
| 1407 | #ifdef VMS |
| 1408 | if (XINT (tem) < NSIG) |
| 1409 | write_string (sys_errlist [XINT (tem)], -1); |
| 1410 | else |
| 1411 | #endif |
| 1412 | Fprinc (symbol, Qnil); |
| 1413 | } |
| 1414 | else if (NETCONN1_P (p)) |
| 1415 | { |
| 1416 | if (EQ (symbol, Qexit)) |
| 1417 | write_string ("closed", -1); |
| 1418 | else if (EQ (p->command, Qt)) |
| 1419 | write_string ("stopped", -1); |
| 1420 | else if (EQ (symbol, Qrun)) |
| 1421 | write_string ("open", -1); |
| 1422 | else |
| 1423 | Fprinc (symbol, Qnil); |
| 1424 | } |
| 1425 | else |
| 1426 | Fprinc (symbol, Qnil); |
| 1427 | |
| 1428 | if (EQ (symbol, Qexit)) |
| 1429 | { |
| 1430 | Lisp_Object tem; |
| 1431 | tem = Fcar (Fcdr (p->status)); |
| 1432 | if (XFASTINT (tem)) |
| 1433 | { |
| 1434 | sprintf (tembuf, " %d", (int) XFASTINT (tem)); |
| 1435 | write_string (tembuf, -1); |
| 1436 | } |
| 1437 | } |
| 1438 | |
| 1439 | if (EQ (symbol, Qsignal) || EQ (symbol, Qexit)) |
| 1440 | remove_process (proc); |
| 1441 | |
| 1442 | Findent_to (i_buffer, minspace); |
| 1443 | if (NILP (p->buffer)) |
| 1444 | insert_string ("(none)"); |
| 1445 | else if (NILP (XBUFFER (p->buffer)->name)) |
| 1446 | insert_string ("(Killed)"); |
| 1447 | else |
| 1448 | Finsert (1, &XBUFFER (p->buffer)->name); |
| 1449 | |
| 1450 | if (!NILP (i_tty)) |
| 1451 | { |
| 1452 | Findent_to (i_tty, minspace); |
| 1453 | if (STRINGP (p->tty_name)) |
| 1454 | Finsert (1, &p->tty_name); |
| 1455 | } |
| 1456 | |
| 1457 | Findent_to (i_command, minspace); |
| 1458 | |
| 1459 | if (EQ (p->status, Qlisten)) |
| 1460 | { |
| 1461 | Lisp_Object port = Fplist_get (p->childp, QCservice); |
| 1462 | if (INTEGERP (port)) |
| 1463 | port = Fnumber_to_string (port); |
| 1464 | if (NILP (port)) |
| 1465 | port = Fformat_network_address (Fplist_get (p->childp, QClocal), Qnil); |
| 1466 | sprintf (tembuf, "(network %s server on %s)\n", |
| 1467 | (DATAGRAM_CHAN_P (XINT (p->infd)) ? "datagram" : "stream"), |
| 1468 | (STRINGP (port) ? (char *)SDATA (port) : "?")); |
| 1469 | insert_string (tembuf); |
| 1470 | } |
| 1471 | else if (NETCONN1_P (p)) |
| 1472 | { |
| 1473 | /* For a local socket, there is no host name, |
| 1474 | so display service instead. */ |
| 1475 | Lisp_Object host = Fplist_get (p->childp, QChost); |
| 1476 | if (!STRINGP (host)) |
| 1477 | { |
| 1478 | host = Fplist_get (p->childp, QCservice); |
| 1479 | if (INTEGERP (host)) |
| 1480 | host = Fnumber_to_string (host); |
| 1481 | } |
| 1482 | if (NILP (host)) |
| 1483 | host = Fformat_network_address (Fplist_get (p->childp, QCremote), Qnil); |
| 1484 | sprintf (tembuf, "(network %s connection to %s)\n", |
| 1485 | (DATAGRAM_CHAN_P (XINT (p->infd)) ? "datagram" : "stream"), |
| 1486 | (STRINGP (host) ? (char *)SDATA (host) : "?")); |
| 1487 | insert_string (tembuf); |
| 1488 | } |
| 1489 | else |
| 1490 | { |
| 1491 | tem = p->command; |
| 1492 | while (1) |
| 1493 | { |
| 1494 | tem1 = Fcar (tem); |
| 1495 | Finsert (1, &tem1); |
| 1496 | tem = Fcdr (tem); |
| 1497 | if (NILP (tem)) |
| 1498 | break; |
| 1499 | insert_string (" "); |
| 1500 | } |
| 1501 | insert_string ("\n"); |
| 1502 | } |
| 1503 | } |
| 1504 | return Qnil; |
| 1505 | } |
| 1506 | |
| 1507 | DEFUN ("list-processes", Flist_processes, Slist_processes, 0, 1, "P", |
| 1508 | doc: /* Display a list of all processes. |
| 1509 | If optional argument QUERY-ONLY is non-nil, only processes with |
| 1510 | the query-on-exit flag set will be listed. |
| 1511 | Any process listed as exited or signaled is actually eliminated |
| 1512 | after the listing is made. */) |
| 1513 | (query_only) |
| 1514 | Lisp_Object query_only; |
| 1515 | { |
| 1516 | internal_with_output_to_temp_buffer ("*Process List*", |
| 1517 | list_processes_1, query_only); |
| 1518 | return Qnil; |
| 1519 | } |
| 1520 | |
| 1521 | DEFUN ("process-list", Fprocess_list, Sprocess_list, 0, 0, 0, |
| 1522 | doc: /* Return a list of all processes. */) |
| 1523 | () |
| 1524 | { |
| 1525 | return Fmapcar (Qcdr, Vprocess_alist); |
| 1526 | } |
| 1527 | \f |
| 1528 | /* Starting asynchronous inferior processes. */ |
| 1529 | |
| 1530 | static Lisp_Object start_process_unwind (); |
| 1531 | |
| 1532 | DEFUN ("start-process", Fstart_process, Sstart_process, 3, MANY, 0, |
| 1533 | doc: /* Start a program in a subprocess. Return the process object for it. |
| 1534 | NAME is name for process. It is modified if necessary to make it unique. |
| 1535 | BUFFER is the buffer (or buffer name) to associate with the process. |
| 1536 | Process output goes at end of that buffer, unless you specify |
| 1537 | an output stream or filter function to handle the output. |
| 1538 | BUFFER may be also nil, meaning that this process is not associated |
| 1539 | with any buffer. |
| 1540 | PROGRAM is the program file name. It is searched for in PATH. |
| 1541 | Remaining arguments are strings to give program as arguments. |
| 1542 | |
| 1543 | usage: (start-process NAME BUFFER PROGRAM &rest PROGRAM-ARGS) */) |
| 1544 | (nargs, args) |
| 1545 | int nargs; |
| 1546 | register Lisp_Object *args; |
| 1547 | { |
| 1548 | Lisp_Object buffer, name, program, proc, current_dir, tem; |
| 1549 | #ifdef VMS |
| 1550 | register unsigned char *new_argv; |
| 1551 | int len; |
| 1552 | #else |
| 1553 | register unsigned char **new_argv; |
| 1554 | #endif |
| 1555 | register int i; |
| 1556 | int count = SPECPDL_INDEX (); |
| 1557 | |
| 1558 | buffer = args[1]; |
| 1559 | if (!NILP (buffer)) |
| 1560 | buffer = Fget_buffer_create (buffer); |
| 1561 | |
| 1562 | /* Make sure that the child will be able to chdir to the current |
| 1563 | buffer's current directory, or its unhandled equivalent. We |
| 1564 | can't just have the child check for an error when it does the |
| 1565 | chdir, since it's in a vfork. |
| 1566 | |
| 1567 | We have to GCPRO around this because Fexpand_file_name and |
| 1568 | Funhandled_file_name_directory might call a file name handling |
| 1569 | function. The argument list is protected by the caller, so all |
| 1570 | we really have to worry about is buffer. */ |
| 1571 | { |
| 1572 | struct gcpro gcpro1, gcpro2; |
| 1573 | |
| 1574 | current_dir = current_buffer->directory; |
| 1575 | |
| 1576 | GCPRO2 (buffer, current_dir); |
| 1577 | |
| 1578 | current_dir |
| 1579 | = expand_and_dir_to_file (Funhandled_file_name_directory (current_dir), |
| 1580 | Qnil); |
| 1581 | if (NILP (Ffile_accessible_directory_p (current_dir))) |
| 1582 | report_file_error ("Setting current directory", |
| 1583 | Fcons (current_buffer->directory, Qnil)); |
| 1584 | |
| 1585 | UNGCPRO; |
| 1586 | } |
| 1587 | |
| 1588 | name = args[0]; |
| 1589 | CHECK_STRING (name); |
| 1590 | |
| 1591 | program = args[2]; |
| 1592 | |
| 1593 | CHECK_STRING (program); |
| 1594 | |
| 1595 | proc = make_process (name); |
| 1596 | /* If an error occurs and we can't start the process, we want to |
| 1597 | remove it from the process list. This means that each error |
| 1598 | check in create_process doesn't need to call remove_process |
| 1599 | itself; it's all taken care of here. */ |
| 1600 | record_unwind_protect (start_process_unwind, proc); |
| 1601 | |
| 1602 | XPROCESS (proc)->childp = Qt; |
| 1603 | XPROCESS (proc)->plist = Qnil; |
| 1604 | XPROCESS (proc)->buffer = buffer; |
| 1605 | XPROCESS (proc)->sentinel = Qnil; |
| 1606 | XPROCESS (proc)->filter = Qnil; |
| 1607 | XPROCESS (proc)->filter_multibyte |
| 1608 | = buffer_defaults.enable_multibyte_characters; |
| 1609 | XPROCESS (proc)->command = Flist (nargs - 2, args + 2); |
| 1610 | |
| 1611 | #ifdef ADAPTIVE_READ_BUFFERING |
| 1612 | XPROCESS (proc)->adaptive_read_buffering = Vprocess_adaptive_read_buffering; |
| 1613 | #endif |
| 1614 | |
| 1615 | /* Make the process marker point into the process buffer (if any). */ |
| 1616 | if (BUFFERP (buffer)) |
| 1617 | set_marker_both (XPROCESS (proc)->mark, buffer, |
| 1618 | BUF_ZV (XBUFFER (buffer)), |
| 1619 | BUF_ZV_BYTE (XBUFFER (buffer))); |
| 1620 | |
| 1621 | { |
| 1622 | /* Decide coding systems for communicating with the process. Here |
| 1623 | we don't setup the structure coding_system nor pay attention to |
| 1624 | unibyte mode. They are done in create_process. */ |
| 1625 | |
| 1626 | /* Qt denotes we have not yet called Ffind_operation_coding_system. */ |
| 1627 | Lisp_Object coding_systems = Qt; |
| 1628 | Lisp_Object val, *args2; |
| 1629 | struct gcpro gcpro1, gcpro2; |
| 1630 | |
| 1631 | val = Vcoding_system_for_read; |
| 1632 | if (NILP (val)) |
| 1633 | { |
| 1634 | args2 = (Lisp_Object *) alloca ((nargs + 1) * sizeof *args2); |
| 1635 | args2[0] = Qstart_process; |
| 1636 | for (i = 0; i < nargs; i++) args2[i + 1] = args[i]; |
| 1637 | GCPRO2 (proc, current_dir); |
| 1638 | coding_systems = Ffind_operation_coding_system (nargs + 1, args2); |
| 1639 | UNGCPRO; |
| 1640 | if (CONSP (coding_systems)) |
| 1641 | val = XCAR (coding_systems); |
| 1642 | else if (CONSP (Vdefault_process_coding_system)) |
| 1643 | val = XCAR (Vdefault_process_coding_system); |
| 1644 | } |
| 1645 | XPROCESS (proc)->decode_coding_system = val; |
| 1646 | |
| 1647 | val = Vcoding_system_for_write; |
| 1648 | if (NILP (val)) |
| 1649 | { |
| 1650 | if (EQ (coding_systems, Qt)) |
| 1651 | { |
| 1652 | args2 = (Lisp_Object *) alloca ((nargs + 1) * sizeof args2); |
| 1653 | args2[0] = Qstart_process; |
| 1654 | for (i = 0; i < nargs; i++) args2[i + 1] = args[i]; |
| 1655 | GCPRO2 (proc, current_dir); |
| 1656 | coding_systems = Ffind_operation_coding_system (nargs + 1, args2); |
| 1657 | UNGCPRO; |
| 1658 | } |
| 1659 | if (CONSP (coding_systems)) |
| 1660 | val = XCDR (coding_systems); |
| 1661 | else if (CONSP (Vdefault_process_coding_system)) |
| 1662 | val = XCDR (Vdefault_process_coding_system); |
| 1663 | } |
| 1664 | XPROCESS (proc)->encode_coding_system = val; |
| 1665 | } |
| 1666 | |
| 1667 | #ifdef VMS |
| 1668 | /* Make a one member argv with all args concatenated |
| 1669 | together separated by a blank. */ |
| 1670 | len = SBYTES (program) + 2; |
| 1671 | for (i = 3; i < nargs; i++) |
| 1672 | { |
| 1673 | tem = args[i]; |
| 1674 | CHECK_STRING (tem); |
| 1675 | len += SBYTES (tem) + 1; /* count the blank */ |
| 1676 | } |
| 1677 | new_argv = (unsigned char *) alloca (len); |
| 1678 | strcpy (new_argv, SDATA (program)); |
| 1679 | for (i = 3; i < nargs; i++) |
| 1680 | { |
| 1681 | tem = args[i]; |
| 1682 | CHECK_STRING (tem); |
| 1683 | strcat (new_argv, " "); |
| 1684 | strcat (new_argv, SDATA (tem)); |
| 1685 | } |
| 1686 | /* Need to add code here to check for program existence on VMS */ |
| 1687 | |
| 1688 | #else /* not VMS */ |
| 1689 | new_argv = (unsigned char **) alloca ((nargs - 1) * sizeof (char *)); |
| 1690 | |
| 1691 | /* If program file name is not absolute, search our path for it. |
| 1692 | Put the name we will really use in TEM. */ |
| 1693 | if (!IS_DIRECTORY_SEP (SREF (program, 0)) |
| 1694 | && !(SCHARS (program) > 1 |
| 1695 | && IS_DEVICE_SEP (SREF (program, 1)))) |
| 1696 | { |
| 1697 | struct gcpro gcpro1, gcpro2, gcpro3, gcpro4; |
| 1698 | |
| 1699 | tem = Qnil; |
| 1700 | GCPRO4 (name, program, buffer, current_dir); |
| 1701 | openp (Vexec_path, program, Vexec_suffixes, &tem, make_number (X_OK)); |
| 1702 | UNGCPRO; |
| 1703 | if (NILP (tem)) |
| 1704 | report_file_error ("Searching for program", Fcons (program, Qnil)); |
| 1705 | tem = Fexpand_file_name (tem, Qnil); |
| 1706 | } |
| 1707 | else |
| 1708 | { |
| 1709 | if (!NILP (Ffile_directory_p (program))) |
| 1710 | error ("Specified program for new process is a directory"); |
| 1711 | tem = program; |
| 1712 | } |
| 1713 | |
| 1714 | /* If program file name starts with /: for quoting a magic name, |
| 1715 | discard that. */ |
| 1716 | if (SBYTES (tem) > 2 && SREF (tem, 0) == '/' |
| 1717 | && SREF (tem, 1) == ':') |
| 1718 | tem = Fsubstring (tem, make_number (2), Qnil); |
| 1719 | |
| 1720 | /* Encode the file name and put it in NEW_ARGV. |
| 1721 | That's where the child will use it to execute the program. */ |
| 1722 | tem = ENCODE_FILE (tem); |
| 1723 | new_argv[0] = SDATA (tem); |
| 1724 | |
| 1725 | /* Here we encode arguments by the coding system used for sending |
| 1726 | data to the process. We don't support using different coding |
| 1727 | systems for encoding arguments and for encoding data sent to the |
| 1728 | process. */ |
| 1729 | |
| 1730 | for (i = 3; i < nargs; i++) |
| 1731 | { |
| 1732 | tem = args[i]; |
| 1733 | CHECK_STRING (tem); |
| 1734 | if (STRING_MULTIBYTE (tem)) |
| 1735 | tem = (code_convert_string_norecord |
| 1736 | (tem, XPROCESS (proc)->encode_coding_system, 1)); |
| 1737 | new_argv[i - 2] = SDATA (tem); |
| 1738 | } |
| 1739 | new_argv[i - 2] = 0; |
| 1740 | #endif /* not VMS */ |
| 1741 | |
| 1742 | XPROCESS (proc)->decoding_buf = make_uninit_string (0); |
| 1743 | XPROCESS (proc)->decoding_carryover = make_number (0); |
| 1744 | XPROCESS (proc)->encoding_buf = make_uninit_string (0); |
| 1745 | XPROCESS (proc)->encoding_carryover = make_number (0); |
| 1746 | |
| 1747 | XPROCESS (proc)->inherit_coding_system_flag |
| 1748 | = (NILP (buffer) || !inherit_process_coding_system |
| 1749 | ? Qnil : Qt); |
| 1750 | |
| 1751 | create_process (proc, (char **) new_argv, current_dir); |
| 1752 | |
| 1753 | return unbind_to (count, proc); |
| 1754 | } |
| 1755 | |
| 1756 | /* This function is the unwind_protect form for Fstart_process. If |
| 1757 | PROC doesn't have its pid set, then we know someone has signaled |
| 1758 | an error and the process wasn't started successfully, so we should |
| 1759 | remove it from the process list. */ |
| 1760 | static Lisp_Object |
| 1761 | start_process_unwind (proc) |
| 1762 | Lisp_Object proc; |
| 1763 | { |
| 1764 | if (!PROCESSP (proc)) |
| 1765 | abort (); |
| 1766 | |
| 1767 | /* Was PROC started successfully? */ |
| 1768 | if (XPROCESS (proc)->pid <= 0) |
| 1769 | remove_process (proc); |
| 1770 | |
| 1771 | return Qnil; |
| 1772 | } |
| 1773 | |
| 1774 | static void |
| 1775 | create_process_1 (timer) |
| 1776 | struct atimer *timer; |
| 1777 | { |
| 1778 | /* Nothing to do. */ |
| 1779 | } |
| 1780 | |
| 1781 | |
| 1782 | #if 0 /* This doesn't work; see the note before sigchld_handler. */ |
| 1783 | #ifdef USG |
| 1784 | #ifdef SIGCHLD |
| 1785 | /* Mimic blocking of signals on system V, which doesn't really have it. */ |
| 1786 | |
| 1787 | /* Nonzero means we got a SIGCHLD when it was supposed to be blocked. */ |
| 1788 | int sigchld_deferred; |
| 1789 | |
| 1790 | SIGTYPE |
| 1791 | create_process_sigchld () |
| 1792 | { |
| 1793 | signal (SIGCHLD, create_process_sigchld); |
| 1794 | |
| 1795 | sigchld_deferred = 1; |
| 1796 | } |
| 1797 | #endif |
| 1798 | #endif |
| 1799 | #endif |
| 1800 | |
| 1801 | #ifndef VMS /* VMS version of this function is in vmsproc.c. */ |
| 1802 | void |
| 1803 | create_process (process, new_argv, current_dir) |
| 1804 | Lisp_Object process; |
| 1805 | char **new_argv; |
| 1806 | Lisp_Object current_dir; |
| 1807 | { |
| 1808 | int pid, inchannel, outchannel; |
| 1809 | int sv[2]; |
| 1810 | #ifdef POSIX_SIGNALS |
| 1811 | sigset_t procmask; |
| 1812 | sigset_t blocked; |
| 1813 | struct sigaction sigint_action; |
| 1814 | struct sigaction sigquit_action; |
| 1815 | #ifdef AIX |
| 1816 | struct sigaction sighup_action; |
| 1817 | #endif |
| 1818 | #else /* !POSIX_SIGNALS */ |
| 1819 | #if 0 |
| 1820 | #ifdef SIGCHLD |
| 1821 | SIGTYPE (*sigchld)(); |
| 1822 | #endif |
| 1823 | #endif /* 0 */ |
| 1824 | #endif /* !POSIX_SIGNALS */ |
| 1825 | /* Use volatile to protect variables from being clobbered by longjmp. */ |
| 1826 | volatile int forkin, forkout; |
| 1827 | volatile int pty_flag = 0; |
| 1828 | #ifndef USE_CRT_DLL |
| 1829 | extern char **environ; |
| 1830 | #endif |
| 1831 | |
| 1832 | inchannel = outchannel = -1; |
| 1833 | |
| 1834 | #ifdef HAVE_PTYS |
| 1835 | if (!NILP (Vprocess_connection_type)) |
| 1836 | outchannel = inchannel = allocate_pty (); |
| 1837 | |
| 1838 | if (inchannel >= 0) |
| 1839 | { |
| 1840 | #if ! defined (USG) || defined (USG_SUBTTY_WORKS) |
| 1841 | /* On most USG systems it does not work to open the pty's tty here, |
| 1842 | then close it and reopen it in the child. */ |
| 1843 | #ifdef O_NOCTTY |
| 1844 | /* Don't let this terminal become our controlling terminal |
| 1845 | (in case we don't have one). */ |
| 1846 | forkout = forkin = emacs_open (pty_name, O_RDWR | O_NOCTTY, 0); |
| 1847 | #else |
| 1848 | forkout = forkin = emacs_open (pty_name, O_RDWR, 0); |
| 1849 | #endif |
| 1850 | if (forkin < 0) |
| 1851 | report_file_error ("Opening pty", Qnil); |
| 1852 | #if defined (RTU) || defined (UNIPLUS) || defined (DONT_REOPEN_PTY) |
| 1853 | /* In the case that vfork is defined as fork, the parent process |
| 1854 | (Emacs) may send some data before the child process completes |
| 1855 | tty options setup. So we setup tty before forking. */ |
| 1856 | child_setup_tty (forkout); |
| 1857 | #endif /* RTU or UNIPLUS or DONT_REOPEN_PTY */ |
| 1858 | #else |
| 1859 | forkin = forkout = -1; |
| 1860 | #endif /* not USG, or USG_SUBTTY_WORKS */ |
| 1861 | pty_flag = 1; |
| 1862 | } |
| 1863 | else |
| 1864 | #endif /* HAVE_PTYS */ |
| 1865 | #ifdef SKTPAIR |
| 1866 | { |
| 1867 | if (socketpair (AF_UNIX, SOCK_STREAM, 0, sv) < 0) |
| 1868 | report_file_error ("Opening socketpair", Qnil); |
| 1869 | outchannel = inchannel = sv[0]; |
| 1870 | forkout = forkin = sv[1]; |
| 1871 | } |
| 1872 | #else /* not SKTPAIR */ |
| 1873 | { |
| 1874 | int tem; |
| 1875 | tem = pipe (sv); |
| 1876 | if (tem < 0) |
| 1877 | report_file_error ("Creating pipe", Qnil); |
| 1878 | inchannel = sv[0]; |
| 1879 | forkout = sv[1]; |
| 1880 | tem = pipe (sv); |
| 1881 | if (tem < 0) |
| 1882 | { |
| 1883 | emacs_close (inchannel); |
| 1884 | emacs_close (forkout); |
| 1885 | report_file_error ("Creating pipe", Qnil); |
| 1886 | } |
| 1887 | outchannel = sv[1]; |
| 1888 | forkin = sv[0]; |
| 1889 | } |
| 1890 | #endif /* not SKTPAIR */ |
| 1891 | |
| 1892 | #if 0 |
| 1893 | /* Replaced by close_process_descs */ |
| 1894 | set_exclusive_use (inchannel); |
| 1895 | set_exclusive_use (outchannel); |
| 1896 | #endif |
| 1897 | |
| 1898 | /* Stride people say it's a mystery why this is needed |
| 1899 | as well as the O_NDELAY, but that it fails without this. */ |
| 1900 | #if defined (STRIDE) || (defined (pfa) && defined (HAVE_PTYS)) |
| 1901 | { |
| 1902 | int one = 1; |
| 1903 | ioctl (inchannel, FIONBIO, &one); |
| 1904 | } |
| 1905 | #endif |
| 1906 | |
| 1907 | #ifdef O_NONBLOCK |
| 1908 | fcntl (inchannel, F_SETFL, O_NONBLOCK); |
| 1909 | fcntl (outchannel, F_SETFL, O_NONBLOCK); |
| 1910 | #else |
| 1911 | #ifdef O_NDELAY |
| 1912 | fcntl (inchannel, F_SETFL, O_NDELAY); |
| 1913 | fcntl (outchannel, F_SETFL, O_NDELAY); |
| 1914 | #endif |
| 1915 | #endif |
| 1916 | |
| 1917 | /* Record this as an active process, with its channels. |
| 1918 | As a result, child_setup will close Emacs's side of the pipes. */ |
| 1919 | chan_process[inchannel] = process; |
| 1920 | XSETINT (XPROCESS (process)->infd, inchannel); |
| 1921 | XSETINT (XPROCESS (process)->outfd, outchannel); |
| 1922 | |
| 1923 | /* Previously we recorded the tty descriptor used in the subprocess. |
| 1924 | It was only used for getting the foreground tty process, so now |
| 1925 | we just reopen the device (see emacs_get_tty_pgrp) as this is |
| 1926 | more portable (see USG_SUBTTY_WORKS above). */ |
| 1927 | |
| 1928 | XPROCESS (process)->pty_flag = (pty_flag ? Qt : Qnil); |
| 1929 | XPROCESS (process)->status = Qrun; |
| 1930 | setup_process_coding_systems (process); |
| 1931 | |
| 1932 | /* Delay interrupts until we have a chance to store |
| 1933 | the new fork's pid in its process structure */ |
| 1934 | #ifdef POSIX_SIGNALS |
| 1935 | sigemptyset (&blocked); |
| 1936 | #ifdef SIGCHLD |
| 1937 | sigaddset (&blocked, SIGCHLD); |
| 1938 | #endif |
| 1939 | #ifdef HAVE_WORKING_VFORK |
| 1940 | /* On many hosts (e.g. Solaris 2.4), if a vforked child calls `signal', |
| 1941 | this sets the parent's signal handlers as well as the child's. |
| 1942 | So delay all interrupts whose handlers the child might munge, |
| 1943 | and record the current handlers so they can be restored later. */ |
| 1944 | sigaddset (&blocked, SIGINT ); sigaction (SIGINT , 0, &sigint_action ); |
| 1945 | sigaddset (&blocked, SIGQUIT); sigaction (SIGQUIT, 0, &sigquit_action); |
| 1946 | #ifdef AIX |
| 1947 | sigaddset (&blocked, SIGHUP ); sigaction (SIGHUP , 0, &sighup_action ); |
| 1948 | #endif |
| 1949 | #endif /* HAVE_WORKING_VFORK */ |
| 1950 | sigprocmask (SIG_BLOCK, &blocked, &procmask); |
| 1951 | #else /* !POSIX_SIGNALS */ |
| 1952 | #ifdef SIGCHLD |
| 1953 | #ifdef BSD4_1 |
| 1954 | sighold (SIGCHLD); |
| 1955 | #else /* not BSD4_1 */ |
| 1956 | #if defined (BSD_SYSTEM) || defined (UNIPLUS) || defined (HPUX) |
| 1957 | sigsetmask (sigmask (SIGCHLD)); |
| 1958 | #else /* ordinary USG */ |
| 1959 | #if 0 |
| 1960 | sigchld_deferred = 0; |
| 1961 | sigchld = signal (SIGCHLD, create_process_sigchld); |
| 1962 | #endif |
| 1963 | #endif /* ordinary USG */ |
| 1964 | #endif /* not BSD4_1 */ |
| 1965 | #endif /* SIGCHLD */ |
| 1966 | #endif /* !POSIX_SIGNALS */ |
| 1967 | |
| 1968 | FD_SET (inchannel, &input_wait_mask); |
| 1969 | FD_SET (inchannel, &non_keyboard_wait_mask); |
| 1970 | if (inchannel > max_process_desc) |
| 1971 | max_process_desc = inchannel; |
| 1972 | |
| 1973 | /* Until we store the proper pid, enable sigchld_handler |
| 1974 | to recognize an unknown pid as standing for this process. |
| 1975 | It is very important not to let this `marker' value stay |
| 1976 | in the table after this function has returned; if it does |
| 1977 | it might cause call-process to hang and subsequent asynchronous |
| 1978 | processes to get their return values scrambled. */ |
| 1979 | XPROCESS (process)->pid = -1; |
| 1980 | |
| 1981 | BLOCK_INPUT; |
| 1982 | |
| 1983 | { |
| 1984 | /* child_setup must clobber environ on systems with true vfork. |
| 1985 | Protect it from permanent change. */ |
| 1986 | char **save_environ = environ; |
| 1987 | |
| 1988 | current_dir = ENCODE_FILE (current_dir); |
| 1989 | |
| 1990 | #ifndef WINDOWSNT |
| 1991 | pid = vfork (); |
| 1992 | if (pid == 0) |
| 1993 | #endif /* not WINDOWSNT */ |
| 1994 | { |
| 1995 | int xforkin = forkin; |
| 1996 | int xforkout = forkout; |
| 1997 | |
| 1998 | #if 0 /* This was probably a mistake--it duplicates code later on, |
| 1999 | but fails to handle all the cases. */ |
| 2000 | /* Make sure SIGCHLD is not blocked in the child. */ |
| 2001 | sigsetmask (SIGEMPTYMASK); |
| 2002 | #endif |
| 2003 | |
| 2004 | /* Make the pty be the controlling terminal of the process. */ |
| 2005 | #ifdef HAVE_PTYS |
| 2006 | /* First, disconnect its current controlling terminal. */ |
| 2007 | #ifdef HAVE_SETSID |
| 2008 | /* We tried doing setsid only if pty_flag, but it caused |
| 2009 | process_set_signal to fail on SGI when using a pipe. */ |
| 2010 | setsid (); |
| 2011 | /* Make the pty's terminal the controlling terminal. */ |
| 2012 | if (pty_flag) |
| 2013 | { |
| 2014 | #ifdef TIOCSCTTY |
| 2015 | /* We ignore the return value |
| 2016 | because faith@cs.unc.edu says that is necessary on Linux. */ |
| 2017 | ioctl (xforkin, TIOCSCTTY, 0); |
| 2018 | #endif |
| 2019 | } |
| 2020 | #else /* not HAVE_SETSID */ |
| 2021 | #ifdef USG |
| 2022 | /* It's very important to call setpgrp here and no time |
| 2023 | afterwards. Otherwise, we lose our controlling tty which |
| 2024 | is set when we open the pty. */ |
| 2025 | setpgrp (); |
| 2026 | #endif /* USG */ |
| 2027 | #endif /* not HAVE_SETSID */ |
| 2028 | #if defined (HAVE_TERMIOS) && defined (LDISC1) |
| 2029 | if (pty_flag && xforkin >= 0) |
| 2030 | { |
| 2031 | struct termios t; |
| 2032 | tcgetattr (xforkin, &t); |
| 2033 | t.c_lflag = LDISC1; |
| 2034 | if (tcsetattr (xforkin, TCSANOW, &t) < 0) |
| 2035 | emacs_write (1, "create_process/tcsetattr LDISC1 failed\n", 39); |
| 2036 | } |
| 2037 | #else |
| 2038 | #if defined (NTTYDISC) && defined (TIOCSETD) |
| 2039 | if (pty_flag && xforkin >= 0) |
| 2040 | { |
| 2041 | /* Use new line discipline. */ |
| 2042 | int ldisc = NTTYDISC; |
| 2043 | ioctl (xforkin, TIOCSETD, &ldisc); |
| 2044 | } |
| 2045 | #endif |
| 2046 | #endif |
| 2047 | #ifdef TIOCNOTTY |
| 2048 | /* In 4.3BSD, the TIOCSPGRP bug has been fixed, and now you |
| 2049 | can do TIOCSPGRP only to the process's controlling tty. */ |
| 2050 | if (pty_flag) |
| 2051 | { |
| 2052 | /* I wonder: would just ioctl (0, TIOCNOTTY, 0) work here? |
| 2053 | I can't test it since I don't have 4.3. */ |
| 2054 | int j = emacs_open ("/dev/tty", O_RDWR, 0); |
| 2055 | ioctl (j, TIOCNOTTY, 0); |
| 2056 | emacs_close (j); |
| 2057 | #ifndef USG |
| 2058 | /* In order to get a controlling terminal on some versions |
| 2059 | of BSD, it is necessary to put the process in pgrp 0 |
| 2060 | before it opens the terminal. */ |
| 2061 | #ifdef HAVE_SETPGID |
| 2062 | setpgid (0, 0); |
| 2063 | #else |
| 2064 | setpgrp (0, 0); |
| 2065 | #endif |
| 2066 | #endif |
| 2067 | } |
| 2068 | #endif /* TIOCNOTTY */ |
| 2069 | |
| 2070 | #if !defined (RTU) && !defined (UNIPLUS) && !defined (DONT_REOPEN_PTY) |
| 2071 | /*** There is a suggestion that this ought to be a |
| 2072 | conditional on TIOCSPGRP, |
| 2073 | or !(defined (HAVE_SETSID) && defined (TIOCSCTTY)). |
| 2074 | Trying the latter gave the wrong results on Debian GNU/Linux 1.1; |
| 2075 | that system does seem to need this code, even though |
| 2076 | both HAVE_SETSID and TIOCSCTTY are defined. */ |
| 2077 | /* Now close the pty (if we had it open) and reopen it. |
| 2078 | This makes the pty the controlling terminal of the subprocess. */ |
| 2079 | if (pty_flag) |
| 2080 | { |
| 2081 | #ifdef SET_CHILD_PTY_PGRP |
| 2082 | int pgrp = getpid (); |
| 2083 | #endif |
| 2084 | |
| 2085 | /* I wonder if emacs_close (emacs_open (pty_name, ...)) |
| 2086 | would work? */ |
| 2087 | if (xforkin >= 0) |
| 2088 | emacs_close (xforkin); |
| 2089 | xforkout = xforkin = emacs_open (pty_name, O_RDWR, 0); |
| 2090 | |
| 2091 | if (xforkin < 0) |
| 2092 | { |
| 2093 | emacs_write (1, "Couldn't open the pty terminal ", 31); |
| 2094 | emacs_write (1, pty_name, strlen (pty_name)); |
| 2095 | emacs_write (1, "\n", 1); |
| 2096 | _exit (1); |
| 2097 | } |
| 2098 | |
| 2099 | #ifdef SET_CHILD_PTY_PGRP |
| 2100 | ioctl (xforkin, TIOCSPGRP, &pgrp); |
| 2101 | ioctl (xforkout, TIOCSPGRP, &pgrp); |
| 2102 | #endif |
| 2103 | } |
| 2104 | #endif /* not UNIPLUS and not RTU and not DONT_REOPEN_PTY */ |
| 2105 | |
| 2106 | #ifdef SETUP_SLAVE_PTY |
| 2107 | if (pty_flag) |
| 2108 | { |
| 2109 | SETUP_SLAVE_PTY; |
| 2110 | } |
| 2111 | #endif /* SETUP_SLAVE_PTY */ |
| 2112 | #ifdef AIX |
| 2113 | /* On AIX, we've disabled SIGHUP above once we start a child on a pty. |
| 2114 | Now reenable it in the child, so it will die when we want it to. */ |
| 2115 | if (pty_flag) |
| 2116 | signal (SIGHUP, SIG_DFL); |
| 2117 | #endif |
| 2118 | #endif /* HAVE_PTYS */ |
| 2119 | |
| 2120 | signal (SIGINT, SIG_DFL); |
| 2121 | signal (SIGQUIT, SIG_DFL); |
| 2122 | |
| 2123 | /* Stop blocking signals in the child. */ |
| 2124 | #ifdef POSIX_SIGNALS |
| 2125 | sigprocmask (SIG_SETMASK, &procmask, 0); |
| 2126 | #else /* !POSIX_SIGNALS */ |
| 2127 | #ifdef SIGCHLD |
| 2128 | #ifdef BSD4_1 |
| 2129 | sigrelse (SIGCHLD); |
| 2130 | #else /* not BSD4_1 */ |
| 2131 | #if defined (BSD_SYSTEM) || defined (UNIPLUS) || defined (HPUX) |
| 2132 | sigsetmask (SIGEMPTYMASK); |
| 2133 | #else /* ordinary USG */ |
| 2134 | #if 0 |
| 2135 | signal (SIGCHLD, sigchld); |
| 2136 | #endif |
| 2137 | #endif /* ordinary USG */ |
| 2138 | #endif /* not BSD4_1 */ |
| 2139 | #endif /* SIGCHLD */ |
| 2140 | #endif /* !POSIX_SIGNALS */ |
| 2141 | |
| 2142 | #if !defined (RTU) && !defined (UNIPLUS) && !defined (DONT_REOPEN_PTY) |
| 2143 | if (pty_flag) |
| 2144 | child_setup_tty (xforkout); |
| 2145 | #endif /* not RTU and not UNIPLUS and not DONT_REOPEN_PTY */ |
| 2146 | #ifdef WINDOWSNT |
| 2147 | pid = child_setup (xforkin, xforkout, xforkout, |
| 2148 | new_argv, 1, current_dir); |
| 2149 | #else /* not WINDOWSNT */ |
| 2150 | child_setup (xforkin, xforkout, xforkout, |
| 2151 | new_argv, 1, current_dir); |
| 2152 | #endif /* not WINDOWSNT */ |
| 2153 | } |
| 2154 | environ = save_environ; |
| 2155 | } |
| 2156 | |
| 2157 | UNBLOCK_INPUT; |
| 2158 | |
| 2159 | /* This runs in the Emacs process. */ |
| 2160 | if (pid < 0) |
| 2161 | { |
| 2162 | if (forkin >= 0) |
| 2163 | emacs_close (forkin); |
| 2164 | if (forkin != forkout && forkout >= 0) |
| 2165 | emacs_close (forkout); |
| 2166 | } |
| 2167 | else |
| 2168 | { |
| 2169 | /* vfork succeeded. */ |
| 2170 | XPROCESS (process)->pid = pid; |
| 2171 | |
| 2172 | #ifdef WINDOWSNT |
| 2173 | register_child (pid, inchannel); |
| 2174 | #endif /* WINDOWSNT */ |
| 2175 | |
| 2176 | /* If the subfork execv fails, and it exits, |
| 2177 | this close hangs. I don't know why. |
| 2178 | So have an interrupt jar it loose. */ |
| 2179 | { |
| 2180 | struct atimer *timer; |
| 2181 | EMACS_TIME offset; |
| 2182 | |
| 2183 | stop_polling (); |
| 2184 | EMACS_SET_SECS_USECS (offset, 1, 0); |
| 2185 | timer = start_atimer (ATIMER_RELATIVE, offset, create_process_1, 0); |
| 2186 | |
| 2187 | if (forkin >= 0) |
| 2188 | emacs_close (forkin); |
| 2189 | |
| 2190 | cancel_atimer (timer); |
| 2191 | start_polling (); |
| 2192 | } |
| 2193 | |
| 2194 | if (forkin != forkout && forkout >= 0) |
| 2195 | emacs_close (forkout); |
| 2196 | |
| 2197 | #ifdef HAVE_PTYS |
| 2198 | if (pty_flag) |
| 2199 | XPROCESS (process)->tty_name = build_string (pty_name); |
| 2200 | else |
| 2201 | #endif |
| 2202 | XPROCESS (process)->tty_name = Qnil; |
| 2203 | } |
| 2204 | |
| 2205 | /* Restore the signal state whether vfork succeeded or not. |
| 2206 | (We will signal an error, below, if it failed.) */ |
| 2207 | #ifdef POSIX_SIGNALS |
| 2208 | #ifdef HAVE_WORKING_VFORK |
| 2209 | /* Restore the parent's signal handlers. */ |
| 2210 | sigaction (SIGINT, &sigint_action, 0); |
| 2211 | sigaction (SIGQUIT, &sigquit_action, 0); |
| 2212 | #ifdef AIX |
| 2213 | sigaction (SIGHUP, &sighup_action, 0); |
| 2214 | #endif |
| 2215 | #endif /* HAVE_WORKING_VFORK */ |
| 2216 | /* Stop blocking signals in the parent. */ |
| 2217 | sigprocmask (SIG_SETMASK, &procmask, 0); |
| 2218 | #else /* !POSIX_SIGNALS */ |
| 2219 | #ifdef SIGCHLD |
| 2220 | #ifdef BSD4_1 |
| 2221 | sigrelse (SIGCHLD); |
| 2222 | #else /* not BSD4_1 */ |
| 2223 | #if defined (BSD_SYSTEM) || defined (UNIPLUS) || defined (HPUX) |
| 2224 | sigsetmask (SIGEMPTYMASK); |
| 2225 | #else /* ordinary USG */ |
| 2226 | #if 0 |
| 2227 | signal (SIGCHLD, sigchld); |
| 2228 | /* Now really handle any of these signals |
| 2229 | that came in during this function. */ |
| 2230 | if (sigchld_deferred) |
| 2231 | kill (getpid (), SIGCHLD); |
| 2232 | #endif |
| 2233 | #endif /* ordinary USG */ |
| 2234 | #endif /* not BSD4_1 */ |
| 2235 | #endif /* SIGCHLD */ |
| 2236 | #endif /* !POSIX_SIGNALS */ |
| 2237 | |
| 2238 | /* Now generate the error if vfork failed. */ |
| 2239 | if (pid < 0) |
| 2240 | report_file_error ("Doing vfork", Qnil); |
| 2241 | } |
| 2242 | #endif /* not VMS */ |
| 2243 | |
| 2244 | \f |
| 2245 | #ifdef HAVE_SOCKETS |
| 2246 | |
| 2247 | /* Convert an internal struct sockaddr to a lisp object (vector or string). |
| 2248 | The address family of sa is not included in the result. */ |
| 2249 | |
| 2250 | static Lisp_Object |
| 2251 | conv_sockaddr_to_lisp (sa, len) |
| 2252 | struct sockaddr *sa; |
| 2253 | int len; |
| 2254 | { |
| 2255 | Lisp_Object address; |
| 2256 | int i; |
| 2257 | unsigned char *cp; |
| 2258 | register struct Lisp_Vector *p; |
| 2259 | |
| 2260 | switch (sa->sa_family) |
| 2261 | { |
| 2262 | case AF_INET: |
| 2263 | { |
| 2264 | struct sockaddr_in *sin = (struct sockaddr_in *) sa; |
| 2265 | len = sizeof (sin->sin_addr) + 1; |
| 2266 | address = Fmake_vector (make_number (len), Qnil); |
| 2267 | p = XVECTOR (address); |
| 2268 | p->contents[--len] = make_number (ntohs (sin->sin_port)); |
| 2269 | cp = (unsigned char *)&sin->sin_addr; |
| 2270 | break; |
| 2271 | } |
| 2272 | #ifdef AF_INET6 |
| 2273 | case AF_INET6: |
| 2274 | { |
| 2275 | struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *) sa; |
| 2276 | uint16_t *ip6 = (uint16_t *)&sin6->sin6_addr; |
| 2277 | len = sizeof (sin6->sin6_addr)/2 + 1; |
| 2278 | address = Fmake_vector (make_number (len), Qnil); |
| 2279 | p = XVECTOR (address); |
| 2280 | p->contents[--len] = make_number (ntohs (sin6->sin6_port)); |
| 2281 | for (i = 0; i < len; i++) |
| 2282 | p->contents[i] = make_number (ntohs (ip6[i])); |
| 2283 | return address; |
| 2284 | } |
| 2285 | #endif |
| 2286 | #ifdef HAVE_LOCAL_SOCKETS |
| 2287 | case AF_LOCAL: |
| 2288 | { |
| 2289 | struct sockaddr_un *sockun = (struct sockaddr_un *) sa; |
| 2290 | for (i = 0; i < sizeof (sockun->sun_path); i++) |
| 2291 | if (sockun->sun_path[i] == 0) |
| 2292 | break; |
| 2293 | return make_unibyte_string (sockun->sun_path, i); |
| 2294 | } |
| 2295 | #endif |
| 2296 | default: |
| 2297 | len -= sizeof (sa->sa_family); |
| 2298 | address = Fcons (make_number (sa->sa_family), |
| 2299 | Fmake_vector (make_number (len), Qnil)); |
| 2300 | p = XVECTOR (XCDR (address)); |
| 2301 | cp = (unsigned char *) sa + sizeof (sa->sa_family); |
| 2302 | break; |
| 2303 | } |
| 2304 | |
| 2305 | i = 0; |
| 2306 | while (i < len) |
| 2307 | p->contents[i++] = make_number (*cp++); |
| 2308 | |
| 2309 | return address; |
| 2310 | } |
| 2311 | |
| 2312 | |
| 2313 | /* Get family and required size for sockaddr structure to hold ADDRESS. */ |
| 2314 | |
| 2315 | static int |
| 2316 | get_lisp_to_sockaddr_size (address, familyp) |
| 2317 | Lisp_Object address; |
| 2318 | int *familyp; |
| 2319 | { |
| 2320 | register struct Lisp_Vector *p; |
| 2321 | |
| 2322 | if (VECTORP (address)) |
| 2323 | { |
| 2324 | p = XVECTOR (address); |
| 2325 | if (p->size == 5) |
| 2326 | { |
| 2327 | *familyp = AF_INET; |
| 2328 | return sizeof (struct sockaddr_in); |
| 2329 | } |
| 2330 | #ifdef AF_INET6 |
| 2331 | else if (p->size == 9) |
| 2332 | { |
| 2333 | *familyp = AF_INET6; |
| 2334 | return sizeof (struct sockaddr_in6); |
| 2335 | } |
| 2336 | #endif |
| 2337 | } |
| 2338 | #ifdef HAVE_LOCAL_SOCKETS |
| 2339 | else if (STRINGP (address)) |
| 2340 | { |
| 2341 | *familyp = AF_LOCAL; |
| 2342 | return sizeof (struct sockaddr_un); |
| 2343 | } |
| 2344 | #endif |
| 2345 | else if (CONSP (address) && INTEGERP (XCAR (address)) && VECTORP (XCDR (address))) |
| 2346 | { |
| 2347 | struct sockaddr *sa; |
| 2348 | *familyp = XINT (XCAR (address)); |
| 2349 | p = XVECTOR (XCDR (address)); |
| 2350 | return p->size + sizeof (sa->sa_family); |
| 2351 | } |
| 2352 | return 0; |
| 2353 | } |
| 2354 | |
| 2355 | /* Convert an address object (vector or string) to an internal sockaddr. |
| 2356 | |
| 2357 | The address format has been basically validated by |
| 2358 | get_lisp_to_sockaddr_size, but this does not mean FAMILY is valid; |
| 2359 | it could have come from user data. So if FAMILY is not valid, |
| 2360 | we return after zeroing *SA. */ |
| 2361 | |
| 2362 | static void |
| 2363 | conv_lisp_to_sockaddr (family, address, sa, len) |
| 2364 | int family; |
| 2365 | Lisp_Object address; |
| 2366 | struct sockaddr *sa; |
| 2367 | int len; |
| 2368 | { |
| 2369 | register struct Lisp_Vector *p; |
| 2370 | register unsigned char *cp = NULL; |
| 2371 | register int i; |
| 2372 | |
| 2373 | bzero (sa, len); |
| 2374 | |
| 2375 | if (VECTORP (address)) |
| 2376 | { |
| 2377 | p = XVECTOR (address); |
| 2378 | if (family == AF_INET) |
| 2379 | { |
| 2380 | struct sockaddr_in *sin = (struct sockaddr_in *) sa; |
| 2381 | len = sizeof (sin->sin_addr) + 1; |
| 2382 | i = XINT (p->contents[--len]); |
| 2383 | sin->sin_port = htons (i); |
| 2384 | cp = (unsigned char *)&sin->sin_addr; |
| 2385 | sa->sa_family = family; |
| 2386 | } |
| 2387 | #ifdef AF_INET6 |
| 2388 | else if (family == AF_INET6) |
| 2389 | { |
| 2390 | struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *) sa; |
| 2391 | uint16_t *ip6 = (uint16_t *)&sin6->sin6_addr; |
| 2392 | len = sizeof (sin6->sin6_addr) + 1; |
| 2393 | i = XINT (p->contents[--len]); |
| 2394 | sin6->sin6_port = htons (i); |
| 2395 | for (i = 0; i < len; i++) |
| 2396 | if (INTEGERP (p->contents[i])) |
| 2397 | { |
| 2398 | int j = XFASTINT (p->contents[i]) & 0xffff; |
| 2399 | ip6[i] = ntohs (j); |
| 2400 | } |
| 2401 | sa->sa_family = family; |
| 2402 | } |
| 2403 | #endif |
| 2404 | return; |
| 2405 | } |
| 2406 | else if (STRINGP (address)) |
| 2407 | { |
| 2408 | #ifdef HAVE_LOCAL_SOCKETS |
| 2409 | if (family == AF_LOCAL) |
| 2410 | { |
| 2411 | struct sockaddr_un *sockun = (struct sockaddr_un *) sa; |
| 2412 | cp = SDATA (address); |
| 2413 | for (i = 0; i < sizeof (sockun->sun_path) && *cp; i++) |
| 2414 | sockun->sun_path[i] = *cp++; |
| 2415 | sa->sa_family = family; |
| 2416 | } |
| 2417 | #endif |
| 2418 | return; |
| 2419 | } |
| 2420 | else |
| 2421 | { |
| 2422 | p = XVECTOR (XCDR (address)); |
| 2423 | cp = (unsigned char *)sa + sizeof (sa->sa_family); |
| 2424 | } |
| 2425 | |
| 2426 | for (i = 0; i < len; i++) |
| 2427 | if (INTEGERP (p->contents[i])) |
| 2428 | *cp++ = XFASTINT (p->contents[i]) & 0xff; |
| 2429 | } |
| 2430 | |
| 2431 | #ifdef DATAGRAM_SOCKETS |
| 2432 | DEFUN ("process-datagram-address", Fprocess_datagram_address, Sprocess_datagram_address, |
| 2433 | 1, 1, 0, |
| 2434 | doc: /* Get the current datagram address associated with PROCESS. */) |
| 2435 | (process) |
| 2436 | Lisp_Object process; |
| 2437 | { |
| 2438 | int channel; |
| 2439 | |
| 2440 | CHECK_PROCESS (process); |
| 2441 | |
| 2442 | if (!DATAGRAM_CONN_P (process)) |
| 2443 | return Qnil; |
| 2444 | |
| 2445 | channel = XINT (XPROCESS (process)->infd); |
| 2446 | return conv_sockaddr_to_lisp (datagram_address[channel].sa, |
| 2447 | datagram_address[channel].len); |
| 2448 | } |
| 2449 | |
| 2450 | DEFUN ("set-process-datagram-address", Fset_process_datagram_address, Sset_process_datagram_address, |
| 2451 | 2, 2, 0, |
| 2452 | doc: /* Set the datagram address for PROCESS to ADDRESS. |
| 2453 | Returns nil upon error setting address, ADDRESS otherwise. */) |
| 2454 | (process, address) |
| 2455 | Lisp_Object process, address; |
| 2456 | { |
| 2457 | int channel; |
| 2458 | int family, len; |
| 2459 | |
| 2460 | CHECK_PROCESS (process); |
| 2461 | |
| 2462 | if (!DATAGRAM_CONN_P (process)) |
| 2463 | return Qnil; |
| 2464 | |
| 2465 | channel = XINT (XPROCESS (process)->infd); |
| 2466 | |
| 2467 | len = get_lisp_to_sockaddr_size (address, &family); |
| 2468 | if (datagram_address[channel].len != len) |
| 2469 | return Qnil; |
| 2470 | conv_lisp_to_sockaddr (family, address, datagram_address[channel].sa, len); |
| 2471 | return address; |
| 2472 | } |
| 2473 | #endif |
| 2474 | \f |
| 2475 | |
| 2476 | static struct socket_options { |
| 2477 | /* The name of this option. Should be lowercase version of option |
| 2478 | name without SO_ prefix. */ |
| 2479 | char *name; |
| 2480 | /* Option level SOL_... */ |
| 2481 | int optlevel; |
| 2482 | /* Option number SO_... */ |
| 2483 | int optnum; |
| 2484 | enum { SOPT_UNKNOWN, SOPT_BOOL, SOPT_INT, SOPT_IFNAME, SOPT_LINGER } opttype; |
| 2485 | enum { OPIX_NONE=0, OPIX_MISC=1, OPIX_REUSEADDR=2 } optbit; |
| 2486 | } socket_options[] = |
| 2487 | { |
| 2488 | #ifdef SO_BINDTODEVICE |
| 2489 | { ":bindtodevice", SOL_SOCKET, SO_BINDTODEVICE, SOPT_IFNAME, OPIX_MISC }, |
| 2490 | #endif |
| 2491 | #ifdef SO_BROADCAST |
| 2492 | { ":broadcast", SOL_SOCKET, SO_BROADCAST, SOPT_BOOL, OPIX_MISC }, |
| 2493 | #endif |
| 2494 | #ifdef SO_DONTROUTE |
| 2495 | { ":dontroute", SOL_SOCKET, SO_DONTROUTE, SOPT_BOOL, OPIX_MISC }, |
| 2496 | #endif |
| 2497 | #ifdef SO_KEEPALIVE |
| 2498 | { ":keepalive", SOL_SOCKET, SO_KEEPALIVE, SOPT_BOOL, OPIX_MISC }, |
| 2499 | #endif |
| 2500 | #ifdef SO_LINGER |
| 2501 | { ":linger", SOL_SOCKET, SO_LINGER, SOPT_LINGER, OPIX_MISC }, |
| 2502 | #endif |
| 2503 | #ifdef SO_OOBINLINE |
| 2504 | { ":oobinline", SOL_SOCKET, SO_OOBINLINE, SOPT_BOOL, OPIX_MISC }, |
| 2505 | #endif |
| 2506 | #ifdef SO_PRIORITY |
| 2507 | { ":priority", SOL_SOCKET, SO_PRIORITY, SOPT_INT, OPIX_MISC }, |
| 2508 | #endif |
| 2509 | #ifdef SO_REUSEADDR |
| 2510 | { ":reuseaddr", SOL_SOCKET, SO_REUSEADDR, SOPT_BOOL, OPIX_REUSEADDR }, |
| 2511 | #endif |
| 2512 | { 0, 0, 0, SOPT_UNKNOWN, OPIX_NONE } |
| 2513 | }; |
| 2514 | |
| 2515 | /* Set option OPT to value VAL on socket S. |
| 2516 | |
| 2517 | Returns (1<<socket_options[OPT].optbit) if option is known, 0 otherwise. |
| 2518 | Signals an error if setting a known option fails. |
| 2519 | */ |
| 2520 | |
| 2521 | static int |
| 2522 | set_socket_option (s, opt, val) |
| 2523 | int s; |
| 2524 | Lisp_Object opt, val; |
| 2525 | { |
| 2526 | char *name; |
| 2527 | struct socket_options *sopt; |
| 2528 | int ret = 0; |
| 2529 | |
| 2530 | CHECK_SYMBOL (opt); |
| 2531 | |
| 2532 | name = (char *) SDATA (SYMBOL_NAME (opt)); |
| 2533 | for (sopt = socket_options; sopt->name; sopt++) |
| 2534 | if (strcmp (name, sopt->name) == 0) |
| 2535 | break; |
| 2536 | |
| 2537 | switch (sopt->opttype) |
| 2538 | { |
| 2539 | case SOPT_BOOL: |
| 2540 | { |
| 2541 | int optval; |
| 2542 | optval = NILP (val) ? 0 : 1; |
| 2543 | ret = setsockopt (s, sopt->optlevel, sopt->optnum, |
| 2544 | &optval, sizeof (optval)); |
| 2545 | break; |
| 2546 | } |
| 2547 | |
| 2548 | case SOPT_INT: |
| 2549 | { |
| 2550 | int optval; |
| 2551 | if (INTEGERP (val)) |
| 2552 | optval = XINT (val); |
| 2553 | else |
| 2554 | error ("Bad option value for %s", name); |
| 2555 | ret = setsockopt (s, sopt->optlevel, sopt->optnum, |
| 2556 | &optval, sizeof (optval)); |
| 2557 | break; |
| 2558 | } |
| 2559 | |
| 2560 | #ifdef SO_BINDTODEVICE |
| 2561 | case SOPT_IFNAME: |
| 2562 | { |
| 2563 | char devname[IFNAMSIZ+1]; |
| 2564 | |
| 2565 | /* This is broken, at least in the Linux 2.4 kernel. |
| 2566 | To unbind, the arg must be a zero integer, not the empty string. |
| 2567 | This should work on all systems. KFS. 2003-09-23. */ |
| 2568 | bzero (devname, sizeof devname); |
| 2569 | if (STRINGP (val)) |
| 2570 | { |
| 2571 | char *arg = (char *) SDATA (val); |
| 2572 | int len = min (strlen (arg), IFNAMSIZ); |
| 2573 | bcopy (arg, devname, len); |
| 2574 | } |
| 2575 | else if (!NILP (val)) |
| 2576 | error ("Bad option value for %s", name); |
| 2577 | ret = setsockopt (s, sopt->optlevel, sopt->optnum, |
| 2578 | devname, IFNAMSIZ); |
| 2579 | break; |
| 2580 | } |
| 2581 | #endif |
| 2582 | |
| 2583 | #ifdef SO_LINGER |
| 2584 | case SOPT_LINGER: |
| 2585 | { |
| 2586 | struct linger linger; |
| 2587 | |
| 2588 | linger.l_onoff = 1; |
| 2589 | linger.l_linger = 0; |
| 2590 | if (INTEGERP (val)) |
| 2591 | linger.l_linger = XINT (val); |
| 2592 | else |
| 2593 | linger.l_onoff = NILP (val) ? 0 : 1; |
| 2594 | ret = setsockopt (s, sopt->optlevel, sopt->optnum, |
| 2595 | &linger, sizeof (linger)); |
| 2596 | break; |
| 2597 | } |
| 2598 | #endif |
| 2599 | |
| 2600 | default: |
| 2601 | return 0; |
| 2602 | } |
| 2603 | |
| 2604 | if (ret < 0) |
| 2605 | report_file_error ("Cannot set network option", |
| 2606 | Fcons (opt, Fcons (val, Qnil))); |
| 2607 | return (1 << sopt->optbit); |
| 2608 | } |
| 2609 | |
| 2610 | |
| 2611 | DEFUN ("set-network-process-option", |
| 2612 | Fset_network_process_option, Sset_network_process_option, |
| 2613 | 3, 4, 0, |
| 2614 | doc: /* For network process PROCESS set option OPTION to value VALUE. |
| 2615 | See `make-network-process' for a list of options and values. |
| 2616 | If optional fourth arg NO-ERROR is non-nil, don't signal an error if |
| 2617 | OPTION is not a supported option, return nil instead; otherwise return t. */) |
| 2618 | (process, option, value, no_error) |
| 2619 | Lisp_Object process, option, value; |
| 2620 | Lisp_Object no_error; |
| 2621 | { |
| 2622 | int s; |
| 2623 | struct Lisp_Process *p; |
| 2624 | |
| 2625 | CHECK_PROCESS (process); |
| 2626 | p = XPROCESS (process); |
| 2627 | if (!NETCONN1_P (p)) |
| 2628 | error ("Process is not a network process"); |
| 2629 | |
| 2630 | s = XINT (p->infd); |
| 2631 | if (s < 0) |
| 2632 | error ("Process is not running"); |
| 2633 | |
| 2634 | if (set_socket_option (s, option, value)) |
| 2635 | { |
| 2636 | p->childp = Fplist_put (p->childp, option, value); |
| 2637 | return Qt; |
| 2638 | } |
| 2639 | |
| 2640 | if (NILP (no_error)) |
| 2641 | error ("Unknown or unsupported option"); |
| 2642 | |
| 2643 | return Qnil; |
| 2644 | } |
| 2645 | |
| 2646 | \f |
| 2647 | /* A version of request_sigio suitable for a record_unwind_protect. */ |
| 2648 | |
| 2649 | static Lisp_Object |
| 2650 | unwind_request_sigio (dummy) |
| 2651 | Lisp_Object dummy; |
| 2652 | { |
| 2653 | if (interrupt_input) |
| 2654 | request_sigio (); |
| 2655 | return Qnil; |
| 2656 | } |
| 2657 | |
| 2658 | /* Create a network stream/datagram client/server process. Treated |
| 2659 | exactly like a normal process when reading and writing. Primary |
| 2660 | differences are in status display and process deletion. A network |
| 2661 | connection has no PID; you cannot signal it. All you can do is |
| 2662 | stop/continue it and deactivate/close it via delete-process */ |
| 2663 | |
| 2664 | DEFUN ("make-network-process", Fmake_network_process, Smake_network_process, |
| 2665 | 0, MANY, 0, |
| 2666 | doc: /* Create and return a network server or client process. |
| 2667 | |
| 2668 | In Emacs, network connections are represented by process objects, so |
| 2669 | input and output work as for subprocesses and `delete-process' closes |
| 2670 | a network connection. However, a network process has no process id, |
| 2671 | it cannot be signaled, and the status codes are different from normal |
| 2672 | processes. |
| 2673 | |
| 2674 | Arguments are specified as keyword/argument pairs. The following |
| 2675 | arguments are defined: |
| 2676 | |
| 2677 | :name NAME -- NAME is name for process. It is modified if necessary |
| 2678 | to make it unique. |
| 2679 | |
| 2680 | :buffer BUFFER -- BUFFER is the buffer (or buffer-name) to associate |
| 2681 | with the process. Process output goes at end of that buffer, unless |
| 2682 | you specify an output stream or filter function to handle the output. |
| 2683 | BUFFER may be also nil, meaning that this process is not associated |
| 2684 | with any buffer. |
| 2685 | |
| 2686 | :host HOST -- HOST is name of the host to connect to, or its IP |
| 2687 | address. The symbol `local' specifies the local host. If specified |
| 2688 | for a server process, it must be a valid name or address for the local |
| 2689 | host, and only clients connecting to that address will be accepted. |
| 2690 | |
| 2691 | :service SERVICE -- SERVICE is name of the service desired, or an |
| 2692 | integer specifying a port number to connect to. If SERVICE is t, |
| 2693 | a random port number is selected for the server. |
| 2694 | |
| 2695 | :type TYPE -- TYPE is the type of connection. The default (nil) is a |
| 2696 | stream type connection, `datagram' creates a datagram type connection. |
| 2697 | |
| 2698 | :family FAMILY -- FAMILY is the address (and protocol) family for the |
| 2699 | service specified by HOST and SERVICE. The default (nil) is to use |
| 2700 | whatever address family (IPv4 or IPv6) that is defined for the host |
| 2701 | and port number specified by HOST and SERVICE. Other address families |
| 2702 | supported are: |
| 2703 | local -- for a local (i.e. UNIX) address specified by SERVICE. |
| 2704 | ipv4 -- use IPv4 address family only. |
| 2705 | ipv6 -- use IPv6 address family only. |
| 2706 | |
| 2707 | :local ADDRESS -- ADDRESS is the local address used for the connection. |
| 2708 | This parameter is ignored when opening a client process. When specified |
| 2709 | for a server process, the FAMILY, HOST and SERVICE args are ignored. |
| 2710 | |
| 2711 | :remote ADDRESS -- ADDRESS is the remote partner's address for the |
| 2712 | connection. This parameter is ignored when opening a stream server |
| 2713 | process. For a datagram server process, it specifies the initial |
| 2714 | setting of the remote datagram address. When specified for a client |
| 2715 | process, the FAMILY, HOST, and SERVICE args are ignored. |
| 2716 | |
| 2717 | The format of ADDRESS depends on the address family: |
| 2718 | - An IPv4 address is represented as an vector of integers [A B C D P] |
| 2719 | corresponding to numeric IP address A.B.C.D and port number P. |
| 2720 | - A local address is represented as a string with the address in the |
| 2721 | local address space. |
| 2722 | - An "unsupported family" address is represented by a cons (F . AV) |
| 2723 | where F is the family number and AV is a vector containing the socket |
| 2724 | address data with one element per address data byte. Do not rely on |
| 2725 | this format in portable code, as it may depend on implementation |
| 2726 | defined constants, data sizes, and data structure alignment. |
| 2727 | |
| 2728 | :coding CODING -- If CODING is a symbol, it specifies the coding |
| 2729 | system used for both reading and writing for this process. If CODING |
| 2730 | is a cons (DECODING . ENCODING), DECODING is used for reading, and |
| 2731 | ENCODING is used for writing. |
| 2732 | |
| 2733 | :nowait BOOL -- If BOOL is non-nil for a stream type client process, |
| 2734 | return without waiting for the connection to complete; instead, the |
| 2735 | sentinel function will be called with second arg matching "open" (if |
| 2736 | successful) or "failed" when the connect completes. Default is to use |
| 2737 | a blocking connect (i.e. wait) for stream type connections. |
| 2738 | |
| 2739 | :noquery BOOL -- Query the user unless BOOL is non-nil, and process is |
| 2740 | running when Emacs is exited. |
| 2741 | |
| 2742 | :stop BOOL -- Start process in the `stopped' state if BOOL non-nil. |
| 2743 | In the stopped state, a server process does not accept new |
| 2744 | connections, and a client process does not handle incoming traffic. |
| 2745 | The stopped state is cleared by `continue-process' and set by |
| 2746 | `stop-process'. |
| 2747 | |
| 2748 | :filter FILTER -- Install FILTER as the process filter. |
| 2749 | |
| 2750 | :filter-multibyte BOOL -- If BOOL is non-nil, strings given to the |
| 2751 | process filter are multibyte, otherwise they are unibyte. |
| 2752 | If this keyword is not specified, the strings are multibyte iff |
| 2753 | `default-enable-multibyte-characters' is non-nil. |
| 2754 | |
| 2755 | :sentinel SENTINEL -- Install SENTINEL as the process sentinel. |
| 2756 | |
| 2757 | :log LOG -- Install LOG as the server process log function. This |
| 2758 | function is called when the server accepts a network connection from a |
| 2759 | client. The arguments are SERVER, CLIENT, and MESSAGE, where SERVER |
| 2760 | is the server process, CLIENT is the new process for the connection, |
| 2761 | and MESSAGE is a string. |
| 2762 | |
| 2763 | :plist PLIST -- Install PLIST as the new process' initial plist. |
| 2764 | |
| 2765 | :server QLEN -- if QLEN is non-nil, create a server process for the |
| 2766 | specified FAMILY, SERVICE, and connection type (stream or datagram). |
| 2767 | If QLEN is an integer, it is used as the max. length of the server's |
| 2768 | pending connection queue (also known as the backlog); the default |
| 2769 | queue length is 5. Default is to create a client process. |
| 2770 | |
| 2771 | The following network options can be specified for this connection: |
| 2772 | |
| 2773 | :broadcast BOOL -- Allow send and receive of datagram broadcasts. |
| 2774 | :dontroute BOOL -- Only send to directly connected hosts. |
| 2775 | :keepalive BOOL -- Send keep-alive messages on network stream. |
| 2776 | :linger BOOL or TIMEOUT -- Send queued messages before closing. |
| 2777 | :oobinline BOOL -- Place out-of-band data in receive data stream. |
| 2778 | :priority INT -- Set protocol defined priority for sent packets. |
| 2779 | :reuseaddr BOOL -- Allow reusing a recently used local address |
| 2780 | (this is allowed by default for a server process). |
| 2781 | :bindtodevice NAME -- bind to interface NAME. Using this may require |
| 2782 | special privileges on some systems. |
| 2783 | |
| 2784 | Consult the relevant system programmer's manual pages for more |
| 2785 | information on using these options. |
| 2786 | |
| 2787 | |
| 2788 | A server process will listen for and accept connections from clients. |
| 2789 | When a client connection is accepted, a new network process is created |
| 2790 | for the connection with the following parameters: |
| 2791 | |
| 2792 | - The client's process name is constructed by concatenating the server |
| 2793 | process' NAME and a client identification string. |
| 2794 | - If the FILTER argument is non-nil, the client process will not get a |
| 2795 | separate process buffer; otherwise, the client's process buffer is a newly |
| 2796 | created buffer named after the server process' BUFFER name or process |
| 2797 | NAME concatenated with the client identification string. |
| 2798 | - The connection type and the process filter and sentinel parameters are |
| 2799 | inherited from the server process' TYPE, FILTER and SENTINEL. |
| 2800 | - The client process' contact info is set according to the client's |
| 2801 | addressing information (typically an IP address and a port number). |
| 2802 | - The client process' plist is initialized from the server's plist. |
| 2803 | |
| 2804 | Notice that the FILTER and SENTINEL args are never used directly by |
| 2805 | the server process. Also, the BUFFER argument is not used directly by |
| 2806 | the server process, but via the optional :log function, accepted (and |
| 2807 | failed) connections may be logged in the server process' buffer. |
| 2808 | |
| 2809 | The original argument list, modified with the actual connection |
| 2810 | information, is available via the `process-contact' function. |
| 2811 | |
| 2812 | usage: (make-network-process &rest ARGS) */) |
| 2813 | (nargs, args) |
| 2814 | int nargs; |
| 2815 | Lisp_Object *args; |
| 2816 | { |
| 2817 | Lisp_Object proc; |
| 2818 | Lisp_Object contact; |
| 2819 | struct Lisp_Process *p; |
| 2820 | #ifdef HAVE_GETADDRINFO |
| 2821 | struct addrinfo ai, *res, *lres; |
| 2822 | struct addrinfo hints; |
| 2823 | char *portstring, portbuf[128]; |
| 2824 | #else /* HAVE_GETADDRINFO */ |
| 2825 | struct _emacs_addrinfo |
| 2826 | { |
| 2827 | int ai_family; |
| 2828 | int ai_socktype; |
| 2829 | int ai_protocol; |
| 2830 | int ai_addrlen; |
| 2831 | struct sockaddr *ai_addr; |
| 2832 | struct _emacs_addrinfo *ai_next; |
| 2833 | } ai, *res, *lres; |
| 2834 | #endif /* HAVE_GETADDRINFO */ |
| 2835 | struct sockaddr_in address_in; |
| 2836 | #ifdef HAVE_LOCAL_SOCKETS |
| 2837 | struct sockaddr_un address_un; |
| 2838 | #endif |
| 2839 | int port; |
| 2840 | int ret = 0; |
| 2841 | int xerrno = 0; |
| 2842 | int s = -1, outch, inch; |
| 2843 | struct gcpro gcpro1; |
| 2844 | int count = SPECPDL_INDEX (); |
| 2845 | int count1; |
| 2846 | Lisp_Object QCaddress; /* one of QClocal or QCremote */ |
| 2847 | Lisp_Object tem; |
| 2848 | Lisp_Object name, buffer, host, service, address; |
| 2849 | Lisp_Object filter, sentinel; |
| 2850 | int is_non_blocking_client = 0; |
| 2851 | int is_server = 0, backlog = 5; |
| 2852 | int socktype; |
| 2853 | int family = -1; |
| 2854 | |
| 2855 | if (nargs == 0) |
| 2856 | return Qnil; |
| 2857 | |
| 2858 | /* Save arguments for process-contact and clone-process. */ |
| 2859 | contact = Flist (nargs, args); |
| 2860 | GCPRO1 (contact); |
| 2861 | |
| 2862 | #ifdef WINDOWSNT |
| 2863 | /* Ensure socket support is loaded if available. */ |
| 2864 | init_winsock (TRUE); |
| 2865 | #endif |
| 2866 | |
| 2867 | /* :type TYPE (nil: stream, datagram */ |
| 2868 | tem = Fplist_get (contact, QCtype); |
| 2869 | if (NILP (tem)) |
| 2870 | socktype = SOCK_STREAM; |
| 2871 | #ifdef DATAGRAM_SOCKETS |
| 2872 | else if (EQ (tem, Qdatagram)) |
| 2873 | socktype = SOCK_DGRAM; |
| 2874 | #endif |
| 2875 | else |
| 2876 | error ("Unsupported connection type"); |
| 2877 | |
| 2878 | /* :server BOOL */ |
| 2879 | tem = Fplist_get (contact, QCserver); |
| 2880 | if (!NILP (tem)) |
| 2881 | { |
| 2882 | /* Don't support network sockets when non-blocking mode is |
| 2883 | not available, since a blocked Emacs is not useful. */ |
| 2884 | #if defined(TERM) || (!defined(O_NONBLOCK) && !defined(O_NDELAY)) |
| 2885 | error ("Network servers not supported"); |
| 2886 | #else |
| 2887 | is_server = 1; |
| 2888 | if (INTEGERP (tem)) |
| 2889 | backlog = XINT (tem); |
| 2890 | #endif |
| 2891 | } |
| 2892 | |
| 2893 | /* Make QCaddress an alias for :local (server) or :remote (client). */ |
| 2894 | QCaddress = is_server ? QClocal : QCremote; |
| 2895 | |
| 2896 | /* :wait BOOL */ |
| 2897 | if (!is_server && socktype == SOCK_STREAM |
| 2898 | && (tem = Fplist_get (contact, QCnowait), !NILP (tem))) |
| 2899 | { |
| 2900 | #ifndef NON_BLOCKING_CONNECT |
| 2901 | error ("Non-blocking connect not supported"); |
| 2902 | #else |
| 2903 | is_non_blocking_client = 1; |
| 2904 | #endif |
| 2905 | } |
| 2906 | |
| 2907 | name = Fplist_get (contact, QCname); |
| 2908 | buffer = Fplist_get (contact, QCbuffer); |
| 2909 | filter = Fplist_get (contact, QCfilter); |
| 2910 | sentinel = Fplist_get (contact, QCsentinel); |
| 2911 | |
| 2912 | CHECK_STRING (name); |
| 2913 | |
| 2914 | #ifdef TERM |
| 2915 | /* Let's handle TERM before things get complicated ... */ |
| 2916 | host = Fplist_get (contact, QChost); |
| 2917 | CHECK_STRING (host); |
| 2918 | |
| 2919 | service = Fplist_get (contact, QCservice); |
| 2920 | if (INTEGERP (service)) |
| 2921 | port = htons ((unsigned short) XINT (service)); |
| 2922 | else |
| 2923 | { |
| 2924 | struct servent *svc_info; |
| 2925 | CHECK_STRING (service); |
| 2926 | svc_info = getservbyname (SDATA (service), "tcp"); |
| 2927 | if (svc_info == 0) |
| 2928 | error ("Unknown service: %s", SDATA (service)); |
| 2929 | port = svc_info->s_port; |
| 2930 | } |
| 2931 | |
| 2932 | s = connect_server (0); |
| 2933 | if (s < 0) |
| 2934 | report_file_error ("error creating socket", Fcons (name, Qnil)); |
| 2935 | send_command (s, C_PORT, 0, "%s:%d", SDATA (host), ntohs (port)); |
| 2936 | send_command (s, C_DUMB, 1, 0); |
| 2937 | |
| 2938 | #else /* not TERM */ |
| 2939 | |
| 2940 | /* Initialize addrinfo structure in case we don't use getaddrinfo. */ |
| 2941 | ai.ai_socktype = socktype; |
| 2942 | ai.ai_protocol = 0; |
| 2943 | ai.ai_next = NULL; |
| 2944 | res = &ai; |
| 2945 | |
| 2946 | /* :local ADDRESS or :remote ADDRESS */ |
| 2947 | address = Fplist_get (contact, QCaddress); |
| 2948 | if (!NILP (address)) |
| 2949 | { |
| 2950 | host = service = Qnil; |
| 2951 | |
| 2952 | if (!(ai.ai_addrlen = get_lisp_to_sockaddr_size (address, &family))) |
| 2953 | error ("Malformed :address"); |
| 2954 | ai.ai_family = family; |
| 2955 | ai.ai_addr = alloca (ai.ai_addrlen); |
| 2956 | conv_lisp_to_sockaddr (family, address, ai.ai_addr, ai.ai_addrlen); |
| 2957 | goto open_socket; |
| 2958 | } |
| 2959 | |
| 2960 | /* :family FAMILY -- nil (for Inet), local, or integer. */ |
| 2961 | tem = Fplist_get (contact, QCfamily); |
| 2962 | if (NILP (tem)) |
| 2963 | { |
| 2964 | #if defined(HAVE_GETADDRINFO) && defined(AF_INET6) |
| 2965 | family = AF_UNSPEC; |
| 2966 | #else |
| 2967 | family = AF_INET; |
| 2968 | #endif |
| 2969 | } |
| 2970 | #ifdef HAVE_LOCAL_SOCKETS |
| 2971 | else if (EQ (tem, Qlocal)) |
| 2972 | family = AF_LOCAL; |
| 2973 | #endif |
| 2974 | #ifdef AF_INET6 |
| 2975 | else if (EQ (tem, Qipv6)) |
| 2976 | family = AF_INET6; |
| 2977 | #endif |
| 2978 | else if (EQ (tem, Qipv4)) |
| 2979 | family = AF_INET; |
| 2980 | else if (INTEGERP (tem)) |
| 2981 | family = XINT (tem); |
| 2982 | else |
| 2983 | error ("Unknown address family"); |
| 2984 | |
| 2985 | ai.ai_family = family; |
| 2986 | |
| 2987 | /* :service SERVICE -- string, integer (port number), or t (random port). */ |
| 2988 | service = Fplist_get (contact, QCservice); |
| 2989 | |
| 2990 | #ifdef HAVE_LOCAL_SOCKETS |
| 2991 | if (family == AF_LOCAL) |
| 2992 | { |
| 2993 | /* Host is not used. */ |
| 2994 | host = Qnil; |
| 2995 | CHECK_STRING (service); |
| 2996 | bzero (&address_un, sizeof address_un); |
| 2997 | address_un.sun_family = AF_LOCAL; |
| 2998 | strncpy (address_un.sun_path, SDATA (service), sizeof address_un.sun_path); |
| 2999 | ai.ai_addr = (struct sockaddr *) &address_un; |
| 3000 | ai.ai_addrlen = sizeof address_un; |
| 3001 | goto open_socket; |
| 3002 | } |
| 3003 | #endif |
| 3004 | |
| 3005 | /* :host HOST -- hostname, ip address, or 'local for localhost. */ |
| 3006 | host = Fplist_get (contact, QChost); |
| 3007 | if (!NILP (host)) |
| 3008 | { |
| 3009 | if (EQ (host, Qlocal)) |
| 3010 | host = build_string ("localhost"); |
| 3011 | CHECK_STRING (host); |
| 3012 | } |
| 3013 | |
| 3014 | /* Slow down polling to every ten seconds. |
| 3015 | Some kernels have a bug which causes retrying connect to fail |
| 3016 | after a connect. Polling can interfere with gethostbyname too. */ |
| 3017 | #ifdef POLL_FOR_INPUT |
| 3018 | if (socktype == SOCK_STREAM) |
| 3019 | { |
| 3020 | record_unwind_protect (unwind_stop_other_atimers, Qnil); |
| 3021 | bind_polling_period (10); |
| 3022 | } |
| 3023 | #endif |
| 3024 | |
| 3025 | #ifdef HAVE_GETADDRINFO |
| 3026 | /* If we have a host, use getaddrinfo to resolve both host and service. |
| 3027 | Otherwise, use getservbyname to lookup the service. */ |
| 3028 | if (!NILP (host)) |
| 3029 | { |
| 3030 | |
| 3031 | /* SERVICE can either be a string or int. |
| 3032 | Convert to a C string for later use by getaddrinfo. */ |
| 3033 | if (EQ (service, Qt)) |
| 3034 | portstring = "0"; |
| 3035 | else if (INTEGERP (service)) |
| 3036 | { |
| 3037 | sprintf (portbuf, "%ld", (long) XINT (service)); |
| 3038 | portstring = portbuf; |
| 3039 | } |
| 3040 | else |
| 3041 | { |
| 3042 | CHECK_STRING (service); |
| 3043 | portstring = SDATA (service); |
| 3044 | } |
| 3045 | |
| 3046 | immediate_quit = 1; |
| 3047 | QUIT; |
| 3048 | memset (&hints, 0, sizeof (hints)); |
| 3049 | hints.ai_flags = 0; |
| 3050 | hints.ai_family = family; |
| 3051 | hints.ai_socktype = socktype; |
| 3052 | hints.ai_protocol = 0; |
| 3053 | ret = getaddrinfo (SDATA (host), portstring, &hints, &res); |
| 3054 | if (ret) |
| 3055 | #ifdef HAVE_GAI_STRERROR |
| 3056 | error ("%s/%s %s", SDATA (host), portstring, gai_strerror(ret)); |
| 3057 | #else |
| 3058 | error ("%s/%s getaddrinfo error %d", SDATA (host), portstring, ret); |
| 3059 | #endif |
| 3060 | immediate_quit = 0; |
| 3061 | |
| 3062 | goto open_socket; |
| 3063 | } |
| 3064 | #endif /* HAVE_GETADDRINFO */ |
| 3065 | |
| 3066 | /* We end up here if getaddrinfo is not defined, or in case no hostname |
| 3067 | has been specified (e.g. for a local server process). */ |
| 3068 | |
| 3069 | if (EQ (service, Qt)) |
| 3070 | port = 0; |
| 3071 | else if (INTEGERP (service)) |
| 3072 | port = htons ((unsigned short) XINT (service)); |
| 3073 | else |
| 3074 | { |
| 3075 | struct servent *svc_info; |
| 3076 | CHECK_STRING (service); |
| 3077 | svc_info = getservbyname (SDATA (service), |
| 3078 | (socktype == SOCK_DGRAM ? "udp" : "tcp")); |
| 3079 | if (svc_info == 0) |
| 3080 | error ("Unknown service: %s", SDATA (service)); |
| 3081 | port = svc_info->s_port; |
| 3082 | } |
| 3083 | |
| 3084 | bzero (&address_in, sizeof address_in); |
| 3085 | address_in.sin_family = family; |
| 3086 | address_in.sin_addr.s_addr = INADDR_ANY; |
| 3087 | address_in.sin_port = port; |
| 3088 | |
| 3089 | #ifndef HAVE_GETADDRINFO |
| 3090 | if (!NILP (host)) |
| 3091 | { |
| 3092 | struct hostent *host_info_ptr; |
| 3093 | |
| 3094 | /* gethostbyname may fail with TRY_AGAIN, but we don't honour that, |
| 3095 | as it may `hang' Emacs for a very long time. */ |
| 3096 | immediate_quit = 1; |
| 3097 | QUIT; |
| 3098 | host_info_ptr = gethostbyname (SDATA (host)); |
| 3099 | immediate_quit = 0; |
| 3100 | |
| 3101 | if (host_info_ptr) |
| 3102 | { |
| 3103 | bcopy (host_info_ptr->h_addr, (char *) &address_in.sin_addr, |
| 3104 | host_info_ptr->h_length); |
| 3105 | family = host_info_ptr->h_addrtype; |
| 3106 | address_in.sin_family = family; |
| 3107 | } |
| 3108 | else |
| 3109 | /* Attempt to interpret host as numeric inet address */ |
| 3110 | { |
| 3111 | IN_ADDR numeric_addr; |
| 3112 | numeric_addr = inet_addr ((char *) SDATA (host)); |
| 3113 | if (NUMERIC_ADDR_ERROR) |
| 3114 | error ("Unknown host \"%s\"", SDATA (host)); |
| 3115 | |
| 3116 | bcopy ((char *)&numeric_addr, (char *) &address_in.sin_addr, |
| 3117 | sizeof (address_in.sin_addr)); |
| 3118 | } |
| 3119 | |
| 3120 | } |
| 3121 | #endif /* not HAVE_GETADDRINFO */ |
| 3122 | |
| 3123 | ai.ai_family = family; |
| 3124 | ai.ai_addr = (struct sockaddr *) &address_in; |
| 3125 | ai.ai_addrlen = sizeof address_in; |
| 3126 | |
| 3127 | open_socket: |
| 3128 | |
| 3129 | /* Kernel bugs (on Ultrix at least) cause lossage (not just EINTR) |
| 3130 | when connect is interrupted. So let's not let it get interrupted. |
| 3131 | Note we do not turn off polling, because polling is only used |
| 3132 | when not interrupt_input, and thus not normally used on the systems |
| 3133 | which have this bug. On systems which use polling, there's no way |
| 3134 | to quit if polling is turned off. */ |
| 3135 | if (interrupt_input |
| 3136 | && !is_server && socktype == SOCK_STREAM) |
| 3137 | { |
| 3138 | /* Comment from KFS: The original open-network-stream code |
| 3139 | didn't unwind protect this, but it seems like the proper |
| 3140 | thing to do. In any case, I don't see how it could harm to |
| 3141 | do this -- and it makes cleanup (using unbind_to) easier. */ |
| 3142 | record_unwind_protect (unwind_request_sigio, Qnil); |
| 3143 | unrequest_sigio (); |
| 3144 | } |
| 3145 | |
| 3146 | /* Do this in case we never enter the for-loop below. */ |
| 3147 | count1 = SPECPDL_INDEX (); |
| 3148 | s = -1; |
| 3149 | |
| 3150 | for (lres = res; lres; lres = lres->ai_next) |
| 3151 | { |
| 3152 | int optn, optbits; |
| 3153 | |
| 3154 | retry_connect: |
| 3155 | |
| 3156 | s = socket (lres->ai_family, lres->ai_socktype, lres->ai_protocol); |
| 3157 | if (s < 0) |
| 3158 | { |
| 3159 | xerrno = errno; |
| 3160 | continue; |
| 3161 | } |
| 3162 | |
| 3163 | #ifdef DATAGRAM_SOCKETS |
| 3164 | if (!is_server && socktype == SOCK_DGRAM) |
| 3165 | break; |
| 3166 | #endif /* DATAGRAM_SOCKETS */ |
| 3167 | |
| 3168 | #ifdef NON_BLOCKING_CONNECT |
| 3169 | if (is_non_blocking_client) |
| 3170 | { |
| 3171 | #ifdef O_NONBLOCK |
| 3172 | ret = fcntl (s, F_SETFL, O_NONBLOCK); |
| 3173 | #else |
| 3174 | ret = fcntl (s, F_SETFL, O_NDELAY); |
| 3175 | #endif |
| 3176 | if (ret < 0) |
| 3177 | { |
| 3178 | xerrno = errno; |
| 3179 | emacs_close (s); |
| 3180 | s = -1; |
| 3181 | continue; |
| 3182 | } |
| 3183 | } |
| 3184 | #endif |
| 3185 | |
| 3186 | /* Make us close S if quit. */ |
| 3187 | record_unwind_protect (close_file_unwind, make_number (s)); |
| 3188 | |
| 3189 | /* Parse network options in the arg list. |
| 3190 | We simply ignore anything which isn't a known option (including other keywords). |
| 3191 | An error is signalled if setting a known option fails. */ |
| 3192 | for (optn = optbits = 0; optn < nargs-1; optn += 2) |
| 3193 | optbits |= set_socket_option (s, args[optn], args[optn+1]); |
| 3194 | |
| 3195 | if (is_server) |
| 3196 | { |
| 3197 | /* Configure as a server socket. */ |
| 3198 | |
| 3199 | /* SO_REUSEADDR = 1 is default for server sockets; must specify |
| 3200 | explicit :reuseaddr key to override this. */ |
| 3201 | #ifdef HAVE_LOCAL_SOCKETS |
| 3202 | if (family != AF_LOCAL) |
| 3203 | #endif |
| 3204 | if (!(optbits & (1 << OPIX_REUSEADDR))) |
| 3205 | { |
| 3206 | int optval = 1; |
| 3207 | if (setsockopt (s, SOL_SOCKET, SO_REUSEADDR, &optval, sizeof optval)) |
| 3208 | report_file_error ("Cannot set reuse option on server socket", Qnil); |
| 3209 | } |
| 3210 | |
| 3211 | if (bind (s, lres->ai_addr, lres->ai_addrlen)) |
| 3212 | report_file_error ("Cannot bind server socket", Qnil); |
| 3213 | |
| 3214 | #ifdef HAVE_GETSOCKNAME |
| 3215 | if (EQ (service, Qt)) |
| 3216 | { |
| 3217 | struct sockaddr_in sa1; |
| 3218 | int len1 = sizeof (sa1); |
| 3219 | if (getsockname (s, (struct sockaddr *)&sa1, &len1) == 0) |
| 3220 | { |
| 3221 | ((struct sockaddr_in *)(lres->ai_addr))->sin_port = sa1.sin_port; |
| 3222 | service = make_number (ntohs (sa1.sin_port)); |
| 3223 | contact = Fplist_put (contact, QCservice, service); |
| 3224 | } |
| 3225 | } |
| 3226 | #endif |
| 3227 | |
| 3228 | if (socktype == SOCK_STREAM && listen (s, backlog)) |
| 3229 | report_file_error ("Cannot listen on server socket", Qnil); |
| 3230 | |
| 3231 | break; |
| 3232 | } |
| 3233 | |
| 3234 | immediate_quit = 1; |
| 3235 | QUIT; |
| 3236 | |
| 3237 | /* This turns off all alarm-based interrupts; the |
| 3238 | bind_polling_period call above doesn't always turn all the |
| 3239 | short-interval ones off, especially if interrupt_input is |
| 3240 | set. |
| 3241 | |
| 3242 | It'd be nice to be able to control the connect timeout |
| 3243 | though. Would non-blocking connect calls be portable? |
| 3244 | |
| 3245 | This used to be conditioned by HAVE_GETADDRINFO. Why? */ |
| 3246 | |
| 3247 | turn_on_atimers (0); |
| 3248 | |
| 3249 | ret = connect (s, lres->ai_addr, lres->ai_addrlen); |
| 3250 | xerrno = errno; |
| 3251 | |
| 3252 | turn_on_atimers (1); |
| 3253 | |
| 3254 | if (ret == 0 || xerrno == EISCONN) |
| 3255 | { |
| 3256 | /* The unwind-protect will be discarded afterwards. |
| 3257 | Likewise for immediate_quit. */ |
| 3258 | break; |
| 3259 | } |
| 3260 | |
| 3261 | #ifdef NON_BLOCKING_CONNECT |
| 3262 | #ifdef EINPROGRESS |
| 3263 | if (is_non_blocking_client && xerrno == EINPROGRESS) |
| 3264 | break; |
| 3265 | #else |
| 3266 | #ifdef EWOULDBLOCK |
| 3267 | if (is_non_blocking_client && xerrno == EWOULDBLOCK) |
| 3268 | break; |
| 3269 | #endif |
| 3270 | #endif |
| 3271 | #endif |
| 3272 | |
| 3273 | immediate_quit = 0; |
| 3274 | |
| 3275 | /* Discard the unwind protect closing S. */ |
| 3276 | specpdl_ptr = specpdl + count1; |
| 3277 | emacs_close (s); |
| 3278 | s = -1; |
| 3279 | |
| 3280 | if (xerrno == EINTR) |
| 3281 | goto retry_connect; |
| 3282 | } |
| 3283 | |
| 3284 | if (s >= 0) |
| 3285 | { |
| 3286 | #ifdef DATAGRAM_SOCKETS |
| 3287 | if (socktype == SOCK_DGRAM) |
| 3288 | { |
| 3289 | if (datagram_address[s].sa) |
| 3290 | abort (); |
| 3291 | datagram_address[s].sa = (struct sockaddr *) xmalloc (lres->ai_addrlen); |
| 3292 | datagram_address[s].len = lres->ai_addrlen; |
| 3293 | if (is_server) |
| 3294 | { |
| 3295 | Lisp_Object remote; |
| 3296 | bzero (datagram_address[s].sa, lres->ai_addrlen); |
| 3297 | if (remote = Fplist_get (contact, QCremote), !NILP (remote)) |
| 3298 | { |
| 3299 | int rfamily, rlen; |
| 3300 | rlen = get_lisp_to_sockaddr_size (remote, &rfamily); |
| 3301 | if (rfamily == lres->ai_family && rlen == lres->ai_addrlen) |
| 3302 | conv_lisp_to_sockaddr (rfamily, remote, |
| 3303 | datagram_address[s].sa, rlen); |
| 3304 | } |
| 3305 | } |
| 3306 | else |
| 3307 | bcopy (lres->ai_addr, datagram_address[s].sa, lres->ai_addrlen); |
| 3308 | } |
| 3309 | #endif |
| 3310 | contact = Fplist_put (contact, QCaddress, |
| 3311 | conv_sockaddr_to_lisp (lres->ai_addr, lres->ai_addrlen)); |
| 3312 | #ifdef HAVE_GETSOCKNAME |
| 3313 | if (!is_server) |
| 3314 | { |
| 3315 | struct sockaddr_in sa1; |
| 3316 | int len1 = sizeof (sa1); |
| 3317 | if (getsockname (s, (struct sockaddr *)&sa1, &len1) == 0) |
| 3318 | contact = Fplist_put (contact, QClocal, |
| 3319 | conv_sockaddr_to_lisp (&sa1, len1)); |
| 3320 | } |
| 3321 | #endif |
| 3322 | } |
| 3323 | |
| 3324 | #ifdef HAVE_GETADDRINFO |
| 3325 | if (res != &ai) |
| 3326 | freeaddrinfo (res); |
| 3327 | #endif |
| 3328 | |
| 3329 | immediate_quit = 0; |
| 3330 | |
| 3331 | /* Discard the unwind protect for closing S, if any. */ |
| 3332 | specpdl_ptr = specpdl + count1; |
| 3333 | |
| 3334 | /* Unwind bind_polling_period and request_sigio. */ |
| 3335 | unbind_to (count, Qnil); |
| 3336 | |
| 3337 | if (s < 0) |
| 3338 | { |
| 3339 | /* If non-blocking got this far - and failed - assume non-blocking is |
| 3340 | not supported after all. This is probably a wrong assumption, but |
| 3341 | the normal blocking calls to open-network-stream handles this error |
| 3342 | better. */ |
| 3343 | if (is_non_blocking_client) |
| 3344 | return Qnil; |
| 3345 | |
| 3346 | errno = xerrno; |
| 3347 | if (is_server) |
| 3348 | report_file_error ("make server process failed", contact); |
| 3349 | else |
| 3350 | report_file_error ("make client process failed", contact); |
| 3351 | } |
| 3352 | |
| 3353 | #endif /* not TERM */ |
| 3354 | |
| 3355 | inch = s; |
| 3356 | outch = s; |
| 3357 | |
| 3358 | if (!NILP (buffer)) |
| 3359 | buffer = Fget_buffer_create (buffer); |
| 3360 | proc = make_process (name); |
| 3361 | |
| 3362 | chan_process[inch] = proc; |
| 3363 | |
| 3364 | #ifdef O_NONBLOCK |
| 3365 | fcntl (inch, F_SETFL, O_NONBLOCK); |
| 3366 | #else |
| 3367 | #ifdef O_NDELAY |
| 3368 | fcntl (inch, F_SETFL, O_NDELAY); |
| 3369 | #endif |
| 3370 | #endif |
| 3371 | |
| 3372 | p = XPROCESS (proc); |
| 3373 | |
| 3374 | p->childp = contact; |
| 3375 | p->plist = Fcopy_sequence (Fplist_get (contact, QCplist)); |
| 3376 | |
| 3377 | p->buffer = buffer; |
| 3378 | p->sentinel = sentinel; |
| 3379 | p->filter = filter; |
| 3380 | p->filter_multibyte = buffer_defaults.enable_multibyte_characters; |
| 3381 | /* Override the above only if :filter-multibyte is specified. */ |
| 3382 | if (! NILP (Fplist_member (contact, QCfilter_multibyte))) |
| 3383 | p->filter_multibyte = Fplist_get (contact, QCfilter_multibyte); |
| 3384 | p->log = Fplist_get (contact, QClog); |
| 3385 | if (tem = Fplist_get (contact, QCnoquery), !NILP (tem)) |
| 3386 | p->kill_without_query = Qt; |
| 3387 | if ((tem = Fplist_get (contact, QCstop), !NILP (tem))) |
| 3388 | p->command = Qt; |
| 3389 | p->pid = 0; |
| 3390 | XSETINT (p->infd, inch); |
| 3391 | XSETINT (p->outfd, outch); |
| 3392 | if (is_server && socktype == SOCK_STREAM) |
| 3393 | p->status = Qlisten; |
| 3394 | |
| 3395 | /* Make the process marker point into the process buffer (if any). */ |
| 3396 | if (BUFFERP (buffer)) |
| 3397 | set_marker_both (p->mark, buffer, |
| 3398 | BUF_ZV (XBUFFER (buffer)), |
| 3399 | BUF_ZV_BYTE (XBUFFER (buffer))); |
| 3400 | |
| 3401 | #ifdef NON_BLOCKING_CONNECT |
| 3402 | if (is_non_blocking_client) |
| 3403 | { |
| 3404 | /* We may get here if connect did succeed immediately. However, |
| 3405 | in that case, we still need to signal this like a non-blocking |
| 3406 | connection. */ |
| 3407 | p->status = Qconnect; |
| 3408 | if (!FD_ISSET (inch, &connect_wait_mask)) |
| 3409 | { |
| 3410 | FD_SET (inch, &connect_wait_mask); |
| 3411 | num_pending_connects++; |
| 3412 | } |
| 3413 | } |
| 3414 | else |
| 3415 | #endif |
| 3416 | /* A server may have a client filter setting of Qt, but it must |
| 3417 | still listen for incoming connects unless it is stopped. */ |
| 3418 | if ((!EQ (p->filter, Qt) && !EQ (p->command, Qt)) |
| 3419 | || (EQ (p->status, Qlisten) && NILP (p->command))) |
| 3420 | { |
| 3421 | FD_SET (inch, &input_wait_mask); |
| 3422 | FD_SET (inch, &non_keyboard_wait_mask); |
| 3423 | } |
| 3424 | |
| 3425 | if (inch > max_process_desc) |
| 3426 | max_process_desc = inch; |
| 3427 | |
| 3428 | tem = Fplist_member (contact, QCcoding); |
| 3429 | if (!NILP (tem) && (!CONSP (tem) || !CONSP (XCDR (tem)))) |
| 3430 | tem = Qnil; /* No error message (too late!). */ |
| 3431 | |
| 3432 | { |
| 3433 | /* Setup coding systems for communicating with the network stream. */ |
| 3434 | struct gcpro gcpro1; |
| 3435 | /* Qt denotes we have not yet called Ffind_operation_coding_system. */ |
| 3436 | Lisp_Object coding_systems = Qt; |
| 3437 | Lisp_Object args[5], val; |
| 3438 | |
| 3439 | if (!NILP (tem)) |
| 3440 | { |
| 3441 | val = XCAR (XCDR (tem)); |
| 3442 | if (CONSP (val)) |
| 3443 | val = XCAR (val); |
| 3444 | } |
| 3445 | else if (!NILP (Vcoding_system_for_read)) |
| 3446 | val = Vcoding_system_for_read; |
| 3447 | else if ((!NILP (buffer) && NILP (XBUFFER (buffer)->enable_multibyte_characters)) |
| 3448 | || (NILP (buffer) && NILP (buffer_defaults.enable_multibyte_characters))) |
| 3449 | /* We dare not decode end-of-line format by setting VAL to |
| 3450 | Qraw_text, because the existing Emacs Lisp libraries |
| 3451 | assume that they receive bare code including a sequene of |
| 3452 | CR LF. */ |
| 3453 | val = Qnil; |
| 3454 | else |
| 3455 | { |
| 3456 | if (NILP (host) || NILP (service)) |
| 3457 | coding_systems = Qnil; |
| 3458 | else |
| 3459 | { |
| 3460 | args[0] = Qopen_network_stream, args[1] = name, |
| 3461 | args[2] = buffer, args[3] = host, args[4] = service; |
| 3462 | GCPRO1 (proc); |
| 3463 | coding_systems = Ffind_operation_coding_system (5, args); |
| 3464 | UNGCPRO; |
| 3465 | } |
| 3466 | if (CONSP (coding_systems)) |
| 3467 | val = XCAR (coding_systems); |
| 3468 | else if (CONSP (Vdefault_process_coding_system)) |
| 3469 | val = XCAR (Vdefault_process_coding_system); |
| 3470 | else |
| 3471 | val = Qnil; |
| 3472 | } |
| 3473 | p->decode_coding_system = val; |
| 3474 | |
| 3475 | if (!NILP (tem)) |
| 3476 | { |
| 3477 | val = XCAR (XCDR (tem)); |
| 3478 | if (CONSP (val)) |
| 3479 | val = XCDR (val); |
| 3480 | } |
| 3481 | else if (!NILP (Vcoding_system_for_write)) |
| 3482 | val = Vcoding_system_for_write; |
| 3483 | else if (NILP (current_buffer->enable_multibyte_characters)) |
| 3484 | val = Qnil; |
| 3485 | else |
| 3486 | { |
| 3487 | if (EQ (coding_systems, Qt)) |
| 3488 | { |
| 3489 | if (NILP (host) || NILP (service)) |
| 3490 | coding_systems = Qnil; |
| 3491 | else |
| 3492 | { |
| 3493 | args[0] = Qopen_network_stream, args[1] = name, |
| 3494 | args[2] = buffer, args[3] = host, args[4] = service; |
| 3495 | GCPRO1 (proc); |
| 3496 | coding_systems = Ffind_operation_coding_system (5, args); |
| 3497 | UNGCPRO; |
| 3498 | } |
| 3499 | } |
| 3500 | if (CONSP (coding_systems)) |
| 3501 | val = XCDR (coding_systems); |
| 3502 | else if (CONSP (Vdefault_process_coding_system)) |
| 3503 | val = XCDR (Vdefault_process_coding_system); |
| 3504 | else |
| 3505 | val = Qnil; |
| 3506 | } |
| 3507 | p->encode_coding_system = val; |
| 3508 | } |
| 3509 | setup_process_coding_systems (proc); |
| 3510 | |
| 3511 | p->decoding_buf = make_uninit_string (0); |
| 3512 | p->decoding_carryover = make_number (0); |
| 3513 | p->encoding_buf = make_uninit_string (0); |
| 3514 | p->encoding_carryover = make_number (0); |
| 3515 | |
| 3516 | p->inherit_coding_system_flag |
| 3517 | = (!NILP (tem) || NILP (buffer) || !inherit_process_coding_system |
| 3518 | ? Qnil : Qt); |
| 3519 | |
| 3520 | UNGCPRO; |
| 3521 | return proc; |
| 3522 | } |
| 3523 | #endif /* HAVE_SOCKETS */ |
| 3524 | |
| 3525 | \f |
| 3526 | #if defined(HAVE_SOCKETS) && defined(HAVE_NET_IF_H) && defined(HAVE_SYS_IOCTL_H) |
| 3527 | |
| 3528 | #ifdef SIOCGIFCONF |
| 3529 | DEFUN ("network-interface-list", Fnetwork_interface_list, Snetwork_interface_list, 0, 0, 0, |
| 3530 | doc: /* Return an alist of all network interfaces and their network address. |
| 3531 | Each element is a cons, the car of which is a string containing the |
| 3532 | interface name, and the cdr is the network address in internal |
| 3533 | format; see the description of ADDRESS in `make-network-process'. */) |
| 3534 | () |
| 3535 | { |
| 3536 | struct ifconf ifconf; |
| 3537 | struct ifreq *ifreqs = NULL; |
| 3538 | int ifaces = 0; |
| 3539 | int buf_size, s; |
| 3540 | Lisp_Object res; |
| 3541 | |
| 3542 | s = socket (AF_INET, SOCK_STREAM, 0); |
| 3543 | if (s < 0) |
| 3544 | return Qnil; |
| 3545 | |
| 3546 | again: |
| 3547 | ifaces += 25; |
| 3548 | buf_size = ifaces * sizeof(ifreqs[0]); |
| 3549 | ifreqs = (struct ifreq *)xrealloc(ifreqs, buf_size); |
| 3550 | if (!ifreqs) |
| 3551 | { |
| 3552 | close (s); |
| 3553 | return Qnil; |
| 3554 | } |
| 3555 | |
| 3556 | ifconf.ifc_len = buf_size; |
| 3557 | ifconf.ifc_req = ifreqs; |
| 3558 | if (ioctl (s, SIOCGIFCONF, &ifconf)) |
| 3559 | { |
| 3560 | close (s); |
| 3561 | return Qnil; |
| 3562 | } |
| 3563 | |
| 3564 | if (ifconf.ifc_len == buf_size) |
| 3565 | goto again; |
| 3566 | |
| 3567 | close (s); |
| 3568 | ifaces = ifconf.ifc_len / sizeof (ifreqs[0]); |
| 3569 | |
| 3570 | res = Qnil; |
| 3571 | while (--ifaces >= 0) |
| 3572 | { |
| 3573 | struct ifreq *ifq = &ifreqs[ifaces]; |
| 3574 | char namebuf[sizeof (ifq->ifr_name) + 1]; |
| 3575 | if (ifq->ifr_addr.sa_family != AF_INET) |
| 3576 | continue; |
| 3577 | bcopy (ifq->ifr_name, namebuf, sizeof (ifq->ifr_name)); |
| 3578 | namebuf[sizeof (ifq->ifr_name)] = 0; |
| 3579 | res = Fcons (Fcons (build_string (namebuf), |
| 3580 | conv_sockaddr_to_lisp (&ifq->ifr_addr, |
| 3581 | sizeof (struct sockaddr))), |
| 3582 | res); |
| 3583 | } |
| 3584 | |
| 3585 | return res; |
| 3586 | } |
| 3587 | #endif /* SIOCGIFCONF */ |
| 3588 | |
| 3589 | #if defined(SIOCGIFADDR) || defined(SIOCGIFHWADDR) || defined(SIOCGIFFLAGS) |
| 3590 | |
| 3591 | struct ifflag_def { |
| 3592 | int flag_bit; |
| 3593 | char *flag_sym; |
| 3594 | }; |
| 3595 | |
| 3596 | static struct ifflag_def ifflag_table[] = { |
| 3597 | #ifdef IFF_UP |
| 3598 | { IFF_UP, "up" }, |
| 3599 | #endif |
| 3600 | #ifdef IFF_BROADCAST |
| 3601 | { IFF_BROADCAST, "broadcast" }, |
| 3602 | #endif |
| 3603 | #ifdef IFF_DEBUG |
| 3604 | { IFF_DEBUG, "debug" }, |
| 3605 | #endif |
| 3606 | #ifdef IFF_LOOPBACK |
| 3607 | { IFF_LOOPBACK, "loopback" }, |
| 3608 | #endif |
| 3609 | #ifdef IFF_POINTOPOINT |
| 3610 | { IFF_POINTOPOINT, "pointopoint" }, |
| 3611 | #endif |
| 3612 | #ifdef IFF_RUNNING |
| 3613 | { IFF_RUNNING, "running" }, |
| 3614 | #endif |
| 3615 | #ifdef IFF_NOARP |
| 3616 | { IFF_NOARP, "noarp" }, |
| 3617 | #endif |
| 3618 | #ifdef IFF_PROMISC |
| 3619 | { IFF_PROMISC, "promisc" }, |
| 3620 | #endif |
| 3621 | #ifdef IFF_NOTRAILERS |
| 3622 | { IFF_NOTRAILERS, "notrailers" }, |
| 3623 | #endif |
| 3624 | #ifdef IFF_ALLMULTI |
| 3625 | { IFF_ALLMULTI, "allmulti" }, |
| 3626 | #endif |
| 3627 | #ifdef IFF_MASTER |
| 3628 | { IFF_MASTER, "master" }, |
| 3629 | #endif |
| 3630 | #ifdef IFF_SLAVE |
| 3631 | { IFF_SLAVE, "slave" }, |
| 3632 | #endif |
| 3633 | #ifdef IFF_MULTICAST |
| 3634 | { IFF_MULTICAST, "multicast" }, |
| 3635 | #endif |
| 3636 | #ifdef IFF_PORTSEL |
| 3637 | { IFF_PORTSEL, "portsel" }, |
| 3638 | #endif |
| 3639 | #ifdef IFF_AUTOMEDIA |
| 3640 | { IFF_AUTOMEDIA, "automedia" }, |
| 3641 | #endif |
| 3642 | #ifdef IFF_DYNAMIC |
| 3643 | { IFF_DYNAMIC, "dynamic" }, |
| 3644 | #endif |
| 3645 | #ifdef IFF_OACTIVE |
| 3646 | { IFF_OACTIVE, "oactive" }, /* OpenBSD: transmission in progress */ |
| 3647 | #endif |
| 3648 | #ifdef IFF_SIMPLEX |
| 3649 | { IFF_SIMPLEX, "simplex" }, /* OpenBSD: can't hear own transmissions */ |
| 3650 | #endif |
| 3651 | #ifdef IFF_LINK0 |
| 3652 | { IFF_LINK0, "link0" }, /* OpenBSD: per link layer defined bit */ |
| 3653 | #endif |
| 3654 | #ifdef IFF_LINK1 |
| 3655 | { IFF_LINK1, "link1" }, /* OpenBSD: per link layer defined bit */ |
| 3656 | #endif |
| 3657 | #ifdef IFF_LINK2 |
| 3658 | { IFF_LINK2, "link2" }, /* OpenBSD: per link layer defined bit */ |
| 3659 | #endif |
| 3660 | { 0, 0 } |
| 3661 | }; |
| 3662 | |
| 3663 | DEFUN ("network-interface-info", Fnetwork_interface_info, Snetwork_interface_info, 1, 1, 0, |
| 3664 | doc: /* Return information about network interface named IFNAME. |
| 3665 | The return value is a list (ADDR BCAST NETMASK HWADDR FLAGS), |
| 3666 | where ADDR is the layer 3 address, BCAST is the layer 3 broadcast address, |
| 3667 | NETMASK is the layer 3 network mask, HWADDR is the layer 2 addres, and |
| 3668 | FLAGS is the current flags of the interface. */) |
| 3669 | (ifname) |
| 3670 | Lisp_Object ifname; |
| 3671 | { |
| 3672 | struct ifreq rq; |
| 3673 | Lisp_Object res = Qnil; |
| 3674 | Lisp_Object elt; |
| 3675 | int s; |
| 3676 | int any = 0; |
| 3677 | |
| 3678 | CHECK_STRING (ifname); |
| 3679 | |
| 3680 | bzero (rq.ifr_name, sizeof rq.ifr_name); |
| 3681 | strncpy (rq.ifr_name, SDATA (ifname), sizeof (rq.ifr_name)); |
| 3682 | |
| 3683 | s = socket (AF_INET, SOCK_STREAM, 0); |
| 3684 | if (s < 0) |
| 3685 | return Qnil; |
| 3686 | |
| 3687 | elt = Qnil; |
| 3688 | #if defined(SIOCGIFFLAGS) && defined(HAVE_STRUCT_IFREQ_IFR_FLAGS) |
| 3689 | if (ioctl (s, SIOCGIFFLAGS, &rq) == 0) |
| 3690 | { |
| 3691 | int flags = rq.ifr_flags; |
| 3692 | struct ifflag_def *fp; |
| 3693 | int fnum; |
| 3694 | |
| 3695 | any++; |
| 3696 | for (fp = ifflag_table; flags != 0 && fp->flag_sym; fp++) |
| 3697 | { |
| 3698 | if (flags & fp->flag_bit) |
| 3699 | { |
| 3700 | elt = Fcons (intern (fp->flag_sym), elt); |
| 3701 | flags -= fp->flag_bit; |
| 3702 | } |
| 3703 | } |
| 3704 | for (fnum = 0; flags && fnum < 32; fnum++) |
| 3705 | { |
| 3706 | if (flags & (1 << fnum)) |
| 3707 | { |
| 3708 | elt = Fcons (make_number (fnum), elt); |
| 3709 | } |
| 3710 | } |
| 3711 | } |
| 3712 | #endif |
| 3713 | res = Fcons (elt, res); |
| 3714 | |
| 3715 | elt = Qnil; |
| 3716 | #if defined(SIOCGIFHWADDR) && defined(HAVE_STRUCT_IFREQ_IFR_HWADDR) |
| 3717 | if (ioctl (s, SIOCGIFHWADDR, &rq) == 0) |
| 3718 | { |
| 3719 | Lisp_Object hwaddr = Fmake_vector (make_number (6), Qnil); |
| 3720 | register struct Lisp_Vector *p = XVECTOR (hwaddr); |
| 3721 | int n; |
| 3722 | |
| 3723 | any++; |
| 3724 | for (n = 0; n < 6; n++) |
| 3725 | p->contents[n] = make_number (((unsigned char *)&rq.ifr_hwaddr.sa_data[0])[n]); |
| 3726 | elt = Fcons (make_number (rq.ifr_hwaddr.sa_family), hwaddr); |
| 3727 | } |
| 3728 | #endif |
| 3729 | res = Fcons (elt, res); |
| 3730 | |
| 3731 | elt = Qnil; |
| 3732 | #if defined(SIOCGIFNETMASK) && (defined(HAVE_STRUCT_IFREQ_IFR_NETMASK) || defined(HAVE_STRUCT_IFREQ_IFR_ADDR)) |
| 3733 | if (ioctl (s, SIOCGIFNETMASK, &rq) == 0) |
| 3734 | { |
| 3735 | any++; |
| 3736 | #ifdef HAVE_STRUCT_IFREQ_IFR_NETMASK |
| 3737 | elt = conv_sockaddr_to_lisp (&rq.ifr_netmask, sizeof (rq.ifr_netmask)); |
| 3738 | #else |
| 3739 | elt = conv_sockaddr_to_lisp (&rq.ifr_addr, sizeof (rq.ifr_addr)); |
| 3740 | #endif |
| 3741 | } |
| 3742 | #endif |
| 3743 | res = Fcons (elt, res); |
| 3744 | |
| 3745 | elt = Qnil; |
| 3746 | #if defined(SIOCGIFBRDADDR) && defined(HAVE_STRUCT_IFREQ_IFR_BROADADDR) |
| 3747 | if (ioctl (s, SIOCGIFBRDADDR, &rq) == 0) |
| 3748 | { |
| 3749 | any++; |
| 3750 | elt = conv_sockaddr_to_lisp (&rq.ifr_broadaddr, sizeof (rq.ifr_broadaddr)); |
| 3751 | } |
| 3752 | #endif |
| 3753 | res = Fcons (elt, res); |
| 3754 | |
| 3755 | elt = Qnil; |
| 3756 | #if defined(SIOCGIFADDR) && defined(HAVE_STRUCT_IFREQ_IFR_ADDR) |
| 3757 | if (ioctl (s, SIOCGIFADDR, &rq) == 0) |
| 3758 | { |
| 3759 | any++; |
| 3760 | elt = conv_sockaddr_to_lisp (&rq.ifr_addr, sizeof (rq.ifr_addr)); |
| 3761 | } |
| 3762 | #endif |
| 3763 | res = Fcons (elt, res); |
| 3764 | |
| 3765 | close (s); |
| 3766 | |
| 3767 | return any ? res : Qnil; |
| 3768 | } |
| 3769 | #endif |
| 3770 | #endif /* HAVE_SOCKETS */ |
| 3771 | |
| 3772 | /* Turn off input and output for process PROC. */ |
| 3773 | |
| 3774 | void |
| 3775 | deactivate_process (proc) |
| 3776 | Lisp_Object proc; |
| 3777 | { |
| 3778 | register int inchannel, outchannel; |
| 3779 | register struct Lisp_Process *p = XPROCESS (proc); |
| 3780 | |
| 3781 | inchannel = XINT (p->infd); |
| 3782 | outchannel = XINT (p->outfd); |
| 3783 | |
| 3784 | #ifdef ADAPTIVE_READ_BUFFERING |
| 3785 | if (XINT (p->read_output_delay) > 0) |
| 3786 | { |
| 3787 | if (--process_output_delay_count < 0) |
| 3788 | process_output_delay_count = 0; |
| 3789 | XSETINT (p->read_output_delay, 0); |
| 3790 | p->read_output_skip = Qnil; |
| 3791 | } |
| 3792 | #endif |
| 3793 | |
| 3794 | if (inchannel >= 0) |
| 3795 | { |
| 3796 | /* Beware SIGCHLD hereabouts. */ |
| 3797 | flush_pending_output (inchannel); |
| 3798 | #ifdef VMS |
| 3799 | { |
| 3800 | VMS_PROC_STUFF *get_vms_process_pointer (), *vs; |
| 3801 | sys$dassgn (outchannel); |
| 3802 | vs = get_vms_process_pointer (p->pid); |
| 3803 | if (vs) |
| 3804 | give_back_vms_process_stuff (vs); |
| 3805 | } |
| 3806 | #else |
| 3807 | emacs_close (inchannel); |
| 3808 | if (outchannel >= 0 && outchannel != inchannel) |
| 3809 | emacs_close (outchannel); |
| 3810 | #endif |
| 3811 | |
| 3812 | XSETINT (p->infd, -1); |
| 3813 | XSETINT (p->outfd, -1); |
| 3814 | #ifdef DATAGRAM_SOCKETS |
| 3815 | if (DATAGRAM_CHAN_P (inchannel)) |
| 3816 | { |
| 3817 | xfree (datagram_address[inchannel].sa); |
| 3818 | datagram_address[inchannel].sa = 0; |
| 3819 | datagram_address[inchannel].len = 0; |
| 3820 | } |
| 3821 | #endif |
| 3822 | chan_process[inchannel] = Qnil; |
| 3823 | FD_CLR (inchannel, &input_wait_mask); |
| 3824 | FD_CLR (inchannel, &non_keyboard_wait_mask); |
| 3825 | #ifdef NON_BLOCKING_CONNECT |
| 3826 | if (FD_ISSET (inchannel, &connect_wait_mask)) |
| 3827 | { |
| 3828 | FD_CLR (inchannel, &connect_wait_mask); |
| 3829 | if (--num_pending_connects < 0) |
| 3830 | abort (); |
| 3831 | } |
| 3832 | #endif |
| 3833 | if (inchannel == max_process_desc) |
| 3834 | { |
| 3835 | int i; |
| 3836 | /* We just closed the highest-numbered process input descriptor, |
| 3837 | so recompute the highest-numbered one now. */ |
| 3838 | max_process_desc = 0; |
| 3839 | for (i = 0; i < MAXDESC; i++) |
| 3840 | if (!NILP (chan_process[i])) |
| 3841 | max_process_desc = i; |
| 3842 | } |
| 3843 | } |
| 3844 | } |
| 3845 | |
| 3846 | /* Close all descriptors currently in use for communication |
| 3847 | with subprocess. This is used in a newly-forked subprocess |
| 3848 | to get rid of irrelevant descriptors. */ |
| 3849 | |
| 3850 | void |
| 3851 | close_process_descs () |
| 3852 | { |
| 3853 | #ifndef WINDOWSNT |
| 3854 | int i; |
| 3855 | for (i = 0; i < MAXDESC; i++) |
| 3856 | { |
| 3857 | Lisp_Object process; |
| 3858 | process = chan_process[i]; |
| 3859 | if (!NILP (process)) |
| 3860 | { |
| 3861 | int in = XINT (XPROCESS (process)->infd); |
| 3862 | int out = XINT (XPROCESS (process)->outfd); |
| 3863 | if (in >= 0) |
| 3864 | emacs_close (in); |
| 3865 | if (out >= 0 && in != out) |
| 3866 | emacs_close (out); |
| 3867 | } |
| 3868 | } |
| 3869 | #endif |
| 3870 | } |
| 3871 | \f |
| 3872 | DEFUN ("accept-process-output", Faccept_process_output, Saccept_process_output, |
| 3873 | 0, 4, 0, |
| 3874 | doc: /* Allow any pending output from subprocesses to be read by Emacs. |
| 3875 | It is read into the process' buffers or given to their filter functions. |
| 3876 | Non-nil arg PROCESS means do not return until some output has been received |
| 3877 | from PROCESS. |
| 3878 | |
| 3879 | Non-nil second arg SECONDS and third arg MILLISEC are number of |
| 3880 | seconds and milliseconds to wait; return after that much time whether |
| 3881 | or not there is input. If SECONDS is a floating point number, |
| 3882 | it specifies a fractional number of seconds to wait. |
| 3883 | |
| 3884 | If optional fourth arg JUST-THIS-ONE is non-nil, only accept output |
| 3885 | from PROCESS, suspending reading output from other processes. |
| 3886 | If JUST-THIS-ONE is an integer, don't run any timers either. |
| 3887 | Return non-nil iff we received any output before the timeout expired. */) |
| 3888 | (process, seconds, millisec, just_this_one) |
| 3889 | register Lisp_Object process, seconds, millisec, just_this_one; |
| 3890 | { |
| 3891 | int secs, usecs = 0; |
| 3892 | |
| 3893 | if (! NILP (process)) |
| 3894 | CHECK_PROCESS (process); |
| 3895 | else |
| 3896 | just_this_one = Qnil; |
| 3897 | |
| 3898 | if (!NILP (seconds)) |
| 3899 | { |
| 3900 | if (INTEGERP (seconds)) |
| 3901 | secs = XINT (seconds); |
| 3902 | else if (FLOATP (seconds)) |
| 3903 | { |
| 3904 | double timeout = XFLOAT_DATA (seconds); |
| 3905 | secs = (int) timeout; |
| 3906 | usecs = (int) ((timeout - (double) secs) * 1000000); |
| 3907 | } |
| 3908 | else |
| 3909 | wrong_type_argument (Qnumberp, seconds); |
| 3910 | |
| 3911 | if (INTEGERP (millisec)) |
| 3912 | { |
| 3913 | int carry; |
| 3914 | usecs += XINT (millisec) * 1000; |
| 3915 | carry = usecs / 1000000; |
| 3916 | secs += carry; |
| 3917 | if ((usecs -= carry * 1000000) < 0) |
| 3918 | { |
| 3919 | secs--; |
| 3920 | usecs += 1000000; |
| 3921 | } |
| 3922 | } |
| 3923 | |
| 3924 | if (secs < 0 || (secs == 0 && usecs == 0)) |
| 3925 | secs = -1, usecs = 0; |
| 3926 | } |
| 3927 | else |
| 3928 | secs = NILP (process) ? -1 : 0; |
| 3929 | |
| 3930 | return |
| 3931 | (wait_reading_process_output (secs, usecs, 0, 0, |
| 3932 | Qnil, |
| 3933 | !NILP (process) ? XPROCESS (process) : NULL, |
| 3934 | NILP (just_this_one) ? 0 : |
| 3935 | !INTEGERP (just_this_one) ? 1 : -1) |
| 3936 | ? Qt : Qnil); |
| 3937 | } |
| 3938 | |
| 3939 | /* Accept a connection for server process SERVER on CHANNEL. */ |
| 3940 | |
| 3941 | static int connect_counter = 0; |
| 3942 | |
| 3943 | static void |
| 3944 | server_accept_connection (server, channel) |
| 3945 | Lisp_Object server; |
| 3946 | int channel; |
| 3947 | { |
| 3948 | Lisp_Object proc, caller, name, buffer; |
| 3949 | Lisp_Object contact, host, service; |
| 3950 | struct Lisp_Process *ps= XPROCESS (server); |
| 3951 | struct Lisp_Process *p; |
| 3952 | int s; |
| 3953 | union u_sockaddr { |
| 3954 | struct sockaddr sa; |
| 3955 | struct sockaddr_in in; |
| 3956 | #ifdef AF_INET6 |
| 3957 | struct sockaddr_in6 in6; |
| 3958 | #endif |
| 3959 | #ifdef HAVE_LOCAL_SOCKETS |
| 3960 | struct sockaddr_un un; |
| 3961 | #endif |
| 3962 | } saddr; |
| 3963 | int len = sizeof saddr; |
| 3964 | |
| 3965 | s = accept (channel, &saddr.sa, &len); |
| 3966 | |
| 3967 | if (s < 0) |
| 3968 | { |
| 3969 | int code = errno; |
| 3970 | |
| 3971 | if (code == EAGAIN) |
| 3972 | return; |
| 3973 | #ifdef EWOULDBLOCK |
| 3974 | if (code == EWOULDBLOCK) |
| 3975 | return; |
| 3976 | #endif |
| 3977 | |
| 3978 | if (!NILP (ps->log)) |
| 3979 | call3 (ps->log, server, Qnil, |
| 3980 | concat3 (build_string ("accept failed with code"), |
| 3981 | Fnumber_to_string (make_number (code)), |
| 3982 | build_string ("\n"))); |
| 3983 | return; |
| 3984 | } |
| 3985 | |
| 3986 | connect_counter++; |
| 3987 | |
| 3988 | /* Setup a new process to handle the connection. */ |
| 3989 | |
| 3990 | /* Generate a unique identification of the caller, and build contact |
| 3991 | information for this process. */ |
| 3992 | host = Qt; |
| 3993 | service = Qnil; |
| 3994 | switch (saddr.sa.sa_family) |
| 3995 | { |
| 3996 | case AF_INET: |
| 3997 | { |
| 3998 | Lisp_Object args[5]; |
| 3999 | unsigned char *ip = (unsigned char *)&saddr.in.sin_addr.s_addr; |
| 4000 | args[0] = build_string ("%d.%d.%d.%d"); |
| 4001 | args[1] = make_number (*ip++); |
| 4002 | args[2] = make_number (*ip++); |
| 4003 | args[3] = make_number (*ip++); |
| 4004 | args[4] = make_number (*ip++); |
| 4005 | host = Fformat (5, args); |
| 4006 | service = make_number (ntohs (saddr.in.sin_port)); |
| 4007 | |
| 4008 | args[0] = build_string (" <%s:%d>"); |
| 4009 | args[1] = host; |
| 4010 | args[2] = service; |
| 4011 | caller = Fformat (3, args); |
| 4012 | } |
| 4013 | break; |
| 4014 | |
| 4015 | #ifdef AF_INET6 |
| 4016 | case AF_INET6: |
| 4017 | { |
| 4018 | Lisp_Object args[9]; |
| 4019 | uint16_t *ip6 = (uint16_t *)&saddr.in6.sin6_addr; |
| 4020 | int i; |
| 4021 | args[0] = build_string ("%x:%x:%x:%x:%x:%x:%x:%x"); |
| 4022 | for (i = 0; i < 8; i++) |
| 4023 | args[i+1] = make_number (ntohs(ip6[i])); |
| 4024 | host = Fformat (9, args); |
| 4025 | service = make_number (ntohs (saddr.in.sin_port)); |
| 4026 | |
| 4027 | args[0] = build_string (" <[%s]:%d>"); |
| 4028 | args[1] = host; |
| 4029 | args[2] = service; |
| 4030 | caller = Fformat (3, args); |
| 4031 | } |
| 4032 | break; |
| 4033 | #endif |
| 4034 | |
| 4035 | #ifdef HAVE_LOCAL_SOCKETS |
| 4036 | case AF_LOCAL: |
| 4037 | #endif |
| 4038 | default: |
| 4039 | caller = Fnumber_to_string (make_number (connect_counter)); |
| 4040 | caller = concat3 (build_string (" <*"), caller, build_string ("*>")); |
| 4041 | break; |
| 4042 | } |
| 4043 | |
| 4044 | /* Create a new buffer name for this process if it doesn't have a |
| 4045 | filter. The new buffer name is based on the buffer name or |
| 4046 | process name of the server process concatenated with the caller |
| 4047 | identification. */ |
| 4048 | |
| 4049 | if (!NILP (ps->filter) && !EQ (ps->filter, Qt)) |
| 4050 | buffer = Qnil; |
| 4051 | else |
| 4052 | { |
| 4053 | buffer = ps->buffer; |
| 4054 | if (!NILP (buffer)) |
| 4055 | buffer = Fbuffer_name (buffer); |
| 4056 | else |
| 4057 | buffer = ps->name; |
| 4058 | if (!NILP (buffer)) |
| 4059 | { |
| 4060 | buffer = concat2 (buffer, caller); |
| 4061 | buffer = Fget_buffer_create (buffer); |
| 4062 | } |
| 4063 | } |
| 4064 | |
| 4065 | /* Generate a unique name for the new server process. Combine the |
| 4066 | server process name with the caller identification. */ |
| 4067 | |
| 4068 | name = concat2 (ps->name, caller); |
| 4069 | proc = make_process (name); |
| 4070 | |
| 4071 | chan_process[s] = proc; |
| 4072 | |
| 4073 | #ifdef O_NONBLOCK |
| 4074 | fcntl (s, F_SETFL, O_NONBLOCK); |
| 4075 | #else |
| 4076 | #ifdef O_NDELAY |
| 4077 | fcntl (s, F_SETFL, O_NDELAY); |
| 4078 | #endif |
| 4079 | #endif |
| 4080 | |
| 4081 | p = XPROCESS (proc); |
| 4082 | |
| 4083 | /* Build new contact information for this setup. */ |
| 4084 | contact = Fcopy_sequence (ps->childp); |
| 4085 | contact = Fplist_put (contact, QCserver, Qnil); |
| 4086 | contact = Fplist_put (contact, QChost, host); |
| 4087 | if (!NILP (service)) |
| 4088 | contact = Fplist_put (contact, QCservice, service); |
| 4089 | contact = Fplist_put (contact, QCremote, |
| 4090 | conv_sockaddr_to_lisp (&saddr.sa, len)); |
| 4091 | #ifdef HAVE_GETSOCKNAME |
| 4092 | len = sizeof saddr; |
| 4093 | if (getsockname (s, &saddr.sa, &len) == 0) |
| 4094 | contact = Fplist_put (contact, QClocal, |
| 4095 | conv_sockaddr_to_lisp (&saddr.sa, len)); |
| 4096 | #endif |
| 4097 | |
| 4098 | p->childp = contact; |
| 4099 | p->plist = Fcopy_sequence (ps->plist); |
| 4100 | |
| 4101 | p->buffer = buffer; |
| 4102 | p->sentinel = ps->sentinel; |
| 4103 | p->filter = ps->filter; |
| 4104 | p->command = Qnil; |
| 4105 | p->pid = 0; |
| 4106 | XSETINT (p->infd, s); |
| 4107 | XSETINT (p->outfd, s); |
| 4108 | p->status = Qrun; |
| 4109 | |
| 4110 | /* Client processes for accepted connections are not stopped initially. */ |
| 4111 | if (!EQ (p->filter, Qt)) |
| 4112 | { |
| 4113 | FD_SET (s, &input_wait_mask); |
| 4114 | FD_SET (s, &non_keyboard_wait_mask); |
| 4115 | } |
| 4116 | |
| 4117 | if (s > max_process_desc) |
| 4118 | max_process_desc = s; |
| 4119 | |
| 4120 | /* Setup coding system for new process based on server process. |
| 4121 | This seems to be the proper thing to do, as the coding system |
| 4122 | of the new process should reflect the settings at the time the |
| 4123 | server socket was opened; not the current settings. */ |
| 4124 | |
| 4125 | p->decode_coding_system = ps->decode_coding_system; |
| 4126 | p->encode_coding_system = ps->encode_coding_system; |
| 4127 | setup_process_coding_systems (proc); |
| 4128 | |
| 4129 | p->decoding_buf = make_uninit_string (0); |
| 4130 | p->decoding_carryover = make_number (0); |
| 4131 | p->encoding_buf = make_uninit_string (0); |
| 4132 | p->encoding_carryover = make_number (0); |
| 4133 | |
| 4134 | p->inherit_coding_system_flag |
| 4135 | = (NILP (buffer) ? Qnil : ps->inherit_coding_system_flag); |
| 4136 | |
| 4137 | if (!NILP (ps->log)) |
| 4138 | call3 (ps->log, server, proc, |
| 4139 | concat3 (build_string ("accept from "), |
| 4140 | (STRINGP (host) ? host : build_string ("-")), |
| 4141 | build_string ("\n"))); |
| 4142 | |
| 4143 | if (!NILP (p->sentinel)) |
| 4144 | exec_sentinel (proc, |
| 4145 | concat3 (build_string ("open from "), |
| 4146 | (STRINGP (host) ? host : build_string ("-")), |
| 4147 | build_string ("\n"))); |
| 4148 | } |
| 4149 | |
| 4150 | /* This variable is different from waiting_for_input in keyboard.c. |
| 4151 | It is used to communicate to a lisp process-filter/sentinel (via the |
| 4152 | function Fwaiting_for_user_input_p below) whether Emacs was waiting |
| 4153 | for user-input when that process-filter was called. |
| 4154 | waiting_for_input cannot be used as that is by definition 0 when |
| 4155 | lisp code is being evalled. |
| 4156 | This is also used in record_asynch_buffer_change. |
| 4157 | For that purpose, this must be 0 |
| 4158 | when not inside wait_reading_process_output. */ |
| 4159 | static int waiting_for_user_input_p; |
| 4160 | |
| 4161 | /* This is here so breakpoints can be put on it. */ |
| 4162 | static void |
| 4163 | wait_reading_process_output_1 () |
| 4164 | { |
| 4165 | } |
| 4166 | |
| 4167 | /* Use a wrapper around select to work around a bug in gdb 5.3. |
| 4168 | Normally, the wrapper is optimzed away by inlining. |
| 4169 | |
| 4170 | If emacs is stopped inside select, the gdb backtrace doesn't |
| 4171 | show the function which called select, so it is practically |
| 4172 | impossible to step through wait_reading_process_output. */ |
| 4173 | |
| 4174 | #ifndef select |
| 4175 | static INLINE int |
| 4176 | select_wrapper (n, rfd, wfd, xfd, tmo) |
| 4177 | int n; |
| 4178 | SELECT_TYPE *rfd, *wfd, *xfd; |
| 4179 | EMACS_TIME *tmo; |
| 4180 | { |
| 4181 | return select (n, rfd, wfd, xfd, tmo); |
| 4182 | } |
| 4183 | #define select select_wrapper |
| 4184 | #endif |
| 4185 | |
| 4186 | /* Read and dispose of subprocess output while waiting for timeout to |
| 4187 | elapse and/or keyboard input to be available. |
| 4188 | |
| 4189 | TIME_LIMIT is: |
| 4190 | timeout in seconds, or |
| 4191 | zero for no limit, or |
| 4192 | -1 means gobble data immediately available but don't wait for any. |
| 4193 | |
| 4194 | MICROSECS is: |
| 4195 | an additional duration to wait, measured in microseconds. |
| 4196 | If this is nonzero and time_limit is 0, then the timeout |
| 4197 | consists of MICROSECS only. |
| 4198 | |
| 4199 | READ_KBD is a lisp value: |
| 4200 | 0 to ignore keyboard input, or |
| 4201 | 1 to return when input is available, or |
| 4202 | -1 meaning caller will actually read the input, so don't throw to |
| 4203 | the quit handler, or |
| 4204 | |
| 4205 | DO_DISPLAY != 0 means redisplay should be done to show subprocess |
| 4206 | output that arrives. |
| 4207 | |
| 4208 | If WAIT_FOR_CELL is a cons cell, wait until its car is non-nil |
| 4209 | (and gobble terminal input into the buffer if any arrives). |
| 4210 | |
| 4211 | If WAIT_PROC is specified, wait until something arrives from that |
| 4212 | process. The return value is true iff we read some input from |
| 4213 | that process. |
| 4214 | |
| 4215 | If JUST_WAIT_PROC is non-nil, handle only output from WAIT_PROC |
| 4216 | (suspending output from other processes). A negative value |
| 4217 | means don't run any timers either. |
| 4218 | |
| 4219 | If WAIT_PROC is specified, then the function returns true iff we |
| 4220 | received input from that process before the timeout elapsed. |
| 4221 | Otherwise, return true iff we received input from any process. */ |
| 4222 | |
| 4223 | int |
| 4224 | wait_reading_process_output (time_limit, microsecs, read_kbd, do_display, |
| 4225 | wait_for_cell, wait_proc, just_wait_proc) |
| 4226 | int time_limit, microsecs, read_kbd, do_display; |
| 4227 | Lisp_Object wait_for_cell; |
| 4228 | struct Lisp_Process *wait_proc; |
| 4229 | int just_wait_proc; |
| 4230 | { |
| 4231 | register int channel, nfds; |
| 4232 | SELECT_TYPE Available; |
| 4233 | #ifdef NON_BLOCKING_CONNECT |
| 4234 | SELECT_TYPE Connecting; |
| 4235 | int check_connect; |
| 4236 | #endif |
| 4237 | int check_delay, no_avail; |
| 4238 | int xerrno; |
| 4239 | Lisp_Object proc; |
| 4240 | EMACS_TIME timeout, end_time; |
| 4241 | int wait_channel = -1; |
| 4242 | int got_some_input = 0; |
| 4243 | /* Either nil or a cons cell, the car of which is of interest and |
| 4244 | may be changed outside of this routine. */ |
| 4245 | int saved_waiting_for_user_input_p = waiting_for_user_input_p; |
| 4246 | |
| 4247 | FD_ZERO (&Available); |
| 4248 | #ifdef NON_BLOCKING_CONNECT |
| 4249 | FD_ZERO (&Connecting); |
| 4250 | #endif |
| 4251 | |
| 4252 | /* If wait_proc is a process to watch, set wait_channel accordingly. */ |
| 4253 | if (wait_proc != NULL) |
| 4254 | wait_channel = XINT (wait_proc->infd); |
| 4255 | |
| 4256 | waiting_for_user_input_p = read_kbd; |
| 4257 | |
| 4258 | /* Since we may need to wait several times, |
| 4259 | compute the absolute time to return at. */ |
| 4260 | if (time_limit || microsecs) |
| 4261 | { |
| 4262 | EMACS_GET_TIME (end_time); |
| 4263 | EMACS_SET_SECS_USECS (timeout, time_limit, microsecs); |
| 4264 | EMACS_ADD_TIME (end_time, end_time, timeout); |
| 4265 | } |
| 4266 | #ifdef POLL_INTERRUPTED_SYS_CALL |
| 4267 | /* AlainF 5-Jul-1996 |
| 4268 | HP-UX 10.10 seem to have problems with signals coming in |
| 4269 | Causes "poll: interrupted system call" messages when Emacs is run |
| 4270 | in an X window |
| 4271 | Turn off periodic alarms (in case they are in use), |
| 4272 | and then turn off any other atimers. */ |
| 4273 | stop_polling (); |
| 4274 | turn_on_atimers (0); |
| 4275 | #endif /* POLL_INTERRUPTED_SYS_CALL */ |
| 4276 | |
| 4277 | while (1) |
| 4278 | { |
| 4279 | int timeout_reduced_for_timers = 0; |
| 4280 | |
| 4281 | /* If calling from keyboard input, do not quit |
| 4282 | since we want to return C-g as an input character. |
| 4283 | Otherwise, do pending quit if requested. */ |
| 4284 | if (read_kbd >= 0) |
| 4285 | QUIT; |
| 4286 | #ifdef SYNC_INPUT |
| 4287 | else if (interrupt_input_pending) |
| 4288 | handle_async_input (); |
| 4289 | #endif |
| 4290 | |
| 4291 | /* Exit now if the cell we're waiting for became non-nil. */ |
| 4292 | if (! NILP (wait_for_cell) && ! NILP (XCAR (wait_for_cell))) |
| 4293 | break; |
| 4294 | |
| 4295 | /* Compute time from now till when time limit is up */ |
| 4296 | /* Exit if already run out */ |
| 4297 | if (time_limit == -1) |
| 4298 | { |
| 4299 | /* -1 specified for timeout means |
| 4300 | gobble output available now |
| 4301 | but don't wait at all. */ |
| 4302 | |
| 4303 | EMACS_SET_SECS_USECS (timeout, 0, 0); |
| 4304 | } |
| 4305 | else if (time_limit || microsecs) |
| 4306 | { |
| 4307 | EMACS_GET_TIME (timeout); |
| 4308 | EMACS_SUB_TIME (timeout, end_time, timeout); |
| 4309 | if (EMACS_TIME_NEG_P (timeout)) |
| 4310 | break; |
| 4311 | } |
| 4312 | else |
| 4313 | { |
| 4314 | EMACS_SET_SECS_USECS (timeout, 100000, 0); |
| 4315 | } |
| 4316 | |
| 4317 | /* Normally we run timers here. |
| 4318 | But not if wait_for_cell; in those cases, |
| 4319 | the wait is supposed to be short, |
| 4320 | and those callers cannot handle running arbitrary Lisp code here. */ |
| 4321 | if (NILP (wait_for_cell) |
| 4322 | && just_wait_proc >= 0) |
| 4323 | { |
| 4324 | EMACS_TIME timer_delay; |
| 4325 | |
| 4326 | do |
| 4327 | { |
| 4328 | int old_timers_run = timers_run; |
| 4329 | struct buffer *old_buffer = current_buffer; |
| 4330 | |
| 4331 | timer_delay = timer_check (1); |
| 4332 | |
| 4333 | /* If a timer has run, this might have changed buffers |
| 4334 | an alike. Make read_key_sequence aware of that. */ |
| 4335 | if (timers_run != old_timers_run |
| 4336 | && old_buffer != current_buffer |
| 4337 | && waiting_for_user_input_p == -1) |
| 4338 | record_asynch_buffer_change (); |
| 4339 | |
| 4340 | if (timers_run != old_timers_run && do_display) |
| 4341 | /* We must retry, since a timer may have requeued itself |
| 4342 | and that could alter the time_delay. */ |
| 4343 | redisplay_preserve_echo_area (9); |
| 4344 | else |
| 4345 | break; |
| 4346 | } |
| 4347 | while (!detect_input_pending ()); |
| 4348 | |
| 4349 | /* If there is unread keyboard input, also return. */ |
| 4350 | if (read_kbd != 0 |
| 4351 | && requeued_events_pending_p ()) |
| 4352 | break; |
| 4353 | |
| 4354 | if (! EMACS_TIME_NEG_P (timer_delay) && time_limit != -1) |
| 4355 | { |
| 4356 | EMACS_TIME difference; |
| 4357 | EMACS_SUB_TIME (difference, timer_delay, timeout); |
| 4358 | if (EMACS_TIME_NEG_P (difference)) |
| 4359 | { |
| 4360 | timeout = timer_delay; |
| 4361 | timeout_reduced_for_timers = 1; |
| 4362 | } |
| 4363 | } |
| 4364 | /* If time_limit is -1, we are not going to wait at all. */ |
| 4365 | else if (time_limit != -1) |
| 4366 | { |
| 4367 | /* This is so a breakpoint can be put here. */ |
| 4368 | wait_reading_process_output_1 (); |
| 4369 | } |
| 4370 | } |
| 4371 | |
| 4372 | /* Cause C-g and alarm signals to take immediate action, |
| 4373 | and cause input available signals to zero out timeout. |
| 4374 | |
| 4375 | It is important that we do this before checking for process |
| 4376 | activity. If we get a SIGCHLD after the explicit checks for |
| 4377 | process activity, timeout is the only way we will know. */ |
| 4378 | if (read_kbd < 0) |
| 4379 | set_waiting_for_input (&timeout); |
| 4380 | |
| 4381 | /* If status of something has changed, and no input is |
| 4382 | available, notify the user of the change right away. After |
| 4383 | this explicit check, we'll let the SIGCHLD handler zap |
| 4384 | timeout to get our attention. */ |
| 4385 | if (update_tick != process_tick && do_display) |
| 4386 | { |
| 4387 | SELECT_TYPE Atemp; |
| 4388 | #ifdef NON_BLOCKING_CONNECT |
| 4389 | SELECT_TYPE Ctemp; |
| 4390 | #endif |
| 4391 | |
| 4392 | Atemp = input_wait_mask; |
| 4393 | #if 0 |
| 4394 | /* On Mac OS X 10.0, the SELECT system call always says input is |
| 4395 | present (for reading) at stdin, even when none is. This |
| 4396 | causes the call to SELECT below to return 1 and |
| 4397 | status_notify not to be called. As a result output of |
| 4398 | subprocesses are incorrectly discarded. |
| 4399 | */ |
| 4400 | FD_CLR (0, &Atemp); |
| 4401 | #endif |
| 4402 | IF_NON_BLOCKING_CONNECT (Ctemp = connect_wait_mask); |
| 4403 | |
| 4404 | EMACS_SET_SECS_USECS (timeout, 0, 0); |
| 4405 | if ((select (max (max_process_desc, max_keyboard_desc) + 1, |
| 4406 | &Atemp, |
| 4407 | #ifdef NON_BLOCKING_CONNECT |
| 4408 | (num_pending_connects > 0 ? &Ctemp : (SELECT_TYPE *)0), |
| 4409 | #else |
| 4410 | (SELECT_TYPE *)0, |
| 4411 | #endif |
| 4412 | (SELECT_TYPE *)0, &timeout) |
| 4413 | <= 0)) |
| 4414 | { |
| 4415 | /* It's okay for us to do this and then continue with |
| 4416 | the loop, since timeout has already been zeroed out. */ |
| 4417 | clear_waiting_for_input (); |
| 4418 | status_notify (NULL); |
| 4419 | } |
| 4420 | } |
| 4421 | |
| 4422 | /* Don't wait for output from a non-running process. Just |
| 4423 | read whatever data has already been received. */ |
| 4424 | if (wait_proc && wait_proc->raw_status_new) |
| 4425 | update_status (wait_proc); |
| 4426 | if (wait_proc |
| 4427 | && ! EQ (wait_proc->status, Qrun) |
| 4428 | && ! EQ (wait_proc->status, Qconnect)) |
| 4429 | { |
| 4430 | int nread, total_nread = 0; |
| 4431 | |
| 4432 | clear_waiting_for_input (); |
| 4433 | XSETPROCESS (proc, wait_proc); |
| 4434 | |
| 4435 | /* Read data from the process, until we exhaust it. */ |
| 4436 | while (XINT (wait_proc->infd) >= 0) |
| 4437 | { |
| 4438 | nread = read_process_output (proc, XINT (wait_proc->infd)); |
| 4439 | |
| 4440 | if (nread == 0) |
| 4441 | break; |
| 4442 | |
| 4443 | if (0 < nread) |
| 4444 | total_nread += nread; |
| 4445 | #ifdef EIO |
| 4446 | else if (nread == -1 && EIO == errno) |
| 4447 | break; |
| 4448 | #endif |
| 4449 | #ifdef EAGAIN |
| 4450 | else if (nread == -1 && EAGAIN == errno) |
| 4451 | break; |
| 4452 | #endif |
| 4453 | #ifdef EWOULDBLOCK |
| 4454 | else if (nread == -1 && EWOULDBLOCK == errno) |
| 4455 | break; |
| 4456 | #endif |
| 4457 | } |
| 4458 | if (total_nread > 0 && do_display) |
| 4459 | redisplay_preserve_echo_area (10); |
| 4460 | |
| 4461 | break; |
| 4462 | } |
| 4463 | |
| 4464 | /* Wait till there is something to do */ |
| 4465 | |
| 4466 | if (wait_proc && just_wait_proc) |
| 4467 | { |
| 4468 | if (XINT (wait_proc->infd) < 0) /* Terminated */ |
| 4469 | break; |
| 4470 | FD_SET (XINT (wait_proc->infd), &Available); |
| 4471 | check_delay = 0; |
| 4472 | IF_NON_BLOCKING_CONNECT (check_connect = 0); |
| 4473 | } |
| 4474 | else if (!NILP (wait_for_cell)) |
| 4475 | { |
| 4476 | Available = non_process_wait_mask; |
| 4477 | check_delay = 0; |
| 4478 | IF_NON_BLOCKING_CONNECT (check_connect = 0); |
| 4479 | } |
| 4480 | else |
| 4481 | { |
| 4482 | if (! read_kbd) |
| 4483 | Available = non_keyboard_wait_mask; |
| 4484 | else |
| 4485 | Available = input_wait_mask; |
| 4486 | IF_NON_BLOCKING_CONNECT (check_connect = (num_pending_connects > 0)); |
| 4487 | check_delay = wait_channel >= 0 ? 0 : process_output_delay_count; |
| 4488 | } |
| 4489 | |
| 4490 | /* If frame size has changed or the window is newly mapped, |
| 4491 | redisplay now, before we start to wait. There is a race |
| 4492 | condition here; if a SIGIO arrives between now and the select |
| 4493 | and indicates that a frame is trashed, the select may block |
| 4494 | displaying a trashed screen. */ |
| 4495 | if (frame_garbaged && do_display) |
| 4496 | { |
| 4497 | clear_waiting_for_input (); |
| 4498 | redisplay_preserve_echo_area (11); |
| 4499 | if (read_kbd < 0) |
| 4500 | set_waiting_for_input (&timeout); |
| 4501 | } |
| 4502 | |
| 4503 | no_avail = 0; |
| 4504 | if (read_kbd && detect_input_pending ()) |
| 4505 | { |
| 4506 | nfds = 0; |
| 4507 | no_avail = 1; |
| 4508 | } |
| 4509 | else |
| 4510 | { |
| 4511 | #ifdef NON_BLOCKING_CONNECT |
| 4512 | if (check_connect) |
| 4513 | Connecting = connect_wait_mask; |
| 4514 | #endif |
| 4515 | |
| 4516 | #ifdef ADAPTIVE_READ_BUFFERING |
| 4517 | /* Set the timeout for adaptive read buffering if any |
| 4518 | process has non-nil read_output_skip and non-zero |
| 4519 | read_output_delay, and we are not reading output for a |
| 4520 | specific wait_channel. It is not executed if |
| 4521 | Vprocess_adaptive_read_buffering is nil. */ |
| 4522 | if (process_output_skip && check_delay > 0) |
| 4523 | { |
| 4524 | int usecs = EMACS_USECS (timeout); |
| 4525 | if (EMACS_SECS (timeout) > 0 || usecs > READ_OUTPUT_DELAY_MAX) |
| 4526 | usecs = READ_OUTPUT_DELAY_MAX; |
| 4527 | for (channel = 0; check_delay > 0 && channel <= max_process_desc; channel++) |
| 4528 | { |
| 4529 | proc = chan_process[channel]; |
| 4530 | if (NILP (proc)) |
| 4531 | continue; |
| 4532 | /* Find minimum non-zero read_output_delay among the |
| 4533 | processes with non-nil read_output_skip. */ |
| 4534 | if (XINT (XPROCESS (proc)->read_output_delay) > 0) |
| 4535 | { |
| 4536 | check_delay--; |
| 4537 | if (NILP (XPROCESS (proc)->read_output_skip)) |
| 4538 | continue; |
| 4539 | FD_CLR (channel, &Available); |
| 4540 | XPROCESS (proc)->read_output_skip = Qnil; |
| 4541 | if (XINT (XPROCESS (proc)->read_output_delay) < usecs) |
| 4542 | usecs = XINT (XPROCESS (proc)->read_output_delay); |
| 4543 | } |
| 4544 | } |
| 4545 | EMACS_SET_SECS_USECS (timeout, 0, usecs); |
| 4546 | process_output_skip = 0; |
| 4547 | } |
| 4548 | #endif |
| 4549 | |
| 4550 | nfds = select (max (max_process_desc, max_keyboard_desc) + 1, |
| 4551 | &Available, |
| 4552 | #ifdef NON_BLOCKING_CONNECT |
| 4553 | (check_connect ? &Connecting : (SELECT_TYPE *)0), |
| 4554 | #else |
| 4555 | (SELECT_TYPE *)0, |
| 4556 | #endif |
| 4557 | (SELECT_TYPE *)0, &timeout); |
| 4558 | } |
| 4559 | |
| 4560 | xerrno = errno; |
| 4561 | |
| 4562 | /* Make C-g and alarm signals set flags again */ |
| 4563 | clear_waiting_for_input (); |
| 4564 | |
| 4565 | /* If we woke up due to SIGWINCH, actually change size now. */ |
| 4566 | do_pending_window_change (0); |
| 4567 | |
| 4568 | if (time_limit && nfds == 0 && ! timeout_reduced_for_timers) |
| 4569 | /* We wanted the full specified time, so return now. */ |
| 4570 | break; |
| 4571 | if (nfds < 0) |
| 4572 | { |
| 4573 | if (xerrno == EINTR) |
| 4574 | no_avail = 1; |
| 4575 | #ifdef ultrix |
| 4576 | /* Ultrix select seems to return ENOMEM when it is |
| 4577 | interrupted. Treat it just like EINTR. Bleah. Note |
| 4578 | that we want to test for the "ultrix" CPP symbol, not |
| 4579 | "__ultrix__"; the latter is only defined under GCC, but |
| 4580 | not by DEC's bundled CC. -JimB */ |
| 4581 | else if (xerrno == ENOMEM) |
| 4582 | no_avail = 1; |
| 4583 | #endif |
| 4584 | #ifdef ALLIANT |
| 4585 | /* This happens for no known reason on ALLIANT. |
| 4586 | I am guessing that this is the right response. -- RMS. */ |
| 4587 | else if (xerrno == EFAULT) |
| 4588 | no_avail = 1; |
| 4589 | #endif |
| 4590 | else if (xerrno == EBADF) |
| 4591 | { |
| 4592 | #ifdef AIX |
| 4593 | /* AIX doesn't handle PTY closure the same way BSD does. On AIX, |
| 4594 | the child's closure of the pts gives the parent a SIGHUP, and |
| 4595 | the ptc file descriptor is automatically closed, |
| 4596 | yielding EBADF here or at select() call above. |
| 4597 | So, SIGHUP is ignored (see def of PTY_TTY_NAME_SPRINTF |
| 4598 | in m/ibmrt-aix.h), and here we just ignore the select error. |
| 4599 | Cleanup occurs c/o status_notify after SIGCLD. */ |
| 4600 | no_avail = 1; /* Cannot depend on values returned */ |
| 4601 | #else |
| 4602 | abort (); |
| 4603 | #endif |
| 4604 | } |
| 4605 | else |
| 4606 | error ("select error: %s", emacs_strerror (xerrno)); |
| 4607 | } |
| 4608 | |
| 4609 | if (no_avail) |
| 4610 | { |
| 4611 | FD_ZERO (&Available); |
| 4612 | IF_NON_BLOCKING_CONNECT (check_connect = 0); |
| 4613 | } |
| 4614 | |
| 4615 | #if defined(sun) && !defined(USG5_4) |
| 4616 | if (nfds > 0 && keyboard_bit_set (&Available) |
| 4617 | && interrupt_input) |
| 4618 | /* System sometimes fails to deliver SIGIO. |
| 4619 | |
| 4620 | David J. Mackenzie says that Emacs doesn't compile under |
| 4621 | Solaris if this code is enabled, thus the USG5_4 in the CPP |
| 4622 | conditional. "I haven't noticed any ill effects so far. |
| 4623 | If you find a Solaris expert somewhere, they might know |
| 4624 | better." */ |
| 4625 | kill (getpid (), SIGIO); |
| 4626 | #endif |
| 4627 | |
| 4628 | #if 0 /* When polling is used, interrupt_input is 0, |
| 4629 | so get_input_pending should read the input. |
| 4630 | So this should not be needed. */ |
| 4631 | /* If we are using polling for input, |
| 4632 | and we see input available, make it get read now. |
| 4633 | Otherwise it might not actually get read for a second. |
| 4634 | And on hpux, since we turn off polling in wait_reading_process_output, |
| 4635 | it might never get read at all if we don't spend much time |
| 4636 | outside of wait_reading_process_output. */ |
| 4637 | if (read_kbd && interrupt_input |
| 4638 | && keyboard_bit_set (&Available) |
| 4639 | && input_polling_used ()) |
| 4640 | kill (getpid (), SIGALRM); |
| 4641 | #endif |
| 4642 | |
| 4643 | /* Check for keyboard input */ |
| 4644 | /* If there is any, return immediately |
| 4645 | to give it higher priority than subprocesses */ |
| 4646 | |
| 4647 | if (read_kbd != 0) |
| 4648 | { |
| 4649 | int old_timers_run = timers_run; |
| 4650 | struct buffer *old_buffer = current_buffer; |
| 4651 | int leave = 0; |
| 4652 | |
| 4653 | if (detect_input_pending_run_timers (do_display)) |
| 4654 | { |
| 4655 | swallow_events (do_display); |
| 4656 | if (detect_input_pending_run_timers (do_display)) |
| 4657 | leave = 1; |
| 4658 | } |
| 4659 | |
| 4660 | /* If a timer has run, this might have changed buffers |
| 4661 | an alike. Make read_key_sequence aware of that. */ |
| 4662 | if (timers_run != old_timers_run |
| 4663 | && waiting_for_user_input_p == -1 |
| 4664 | && old_buffer != current_buffer) |
| 4665 | record_asynch_buffer_change (); |
| 4666 | |
| 4667 | if (leave) |
| 4668 | break; |
| 4669 | } |
| 4670 | |
| 4671 | /* If there is unread keyboard input, also return. */ |
| 4672 | if (read_kbd != 0 |
| 4673 | && requeued_events_pending_p ()) |
| 4674 | break; |
| 4675 | |
| 4676 | /* If we are not checking for keyboard input now, |
| 4677 | do process events (but don't run any timers). |
| 4678 | This is so that X events will be processed. |
| 4679 | Otherwise they may have to wait until polling takes place. |
| 4680 | That would causes delays in pasting selections, for example. |
| 4681 | |
| 4682 | (We used to do this only if wait_for_cell.) */ |
| 4683 | if (read_kbd == 0 && detect_input_pending ()) |
| 4684 | { |
| 4685 | swallow_events (do_display); |
| 4686 | #if 0 /* Exiting when read_kbd doesn't request that seems wrong, though. */ |
| 4687 | if (detect_input_pending ()) |
| 4688 | break; |
| 4689 | #endif |
| 4690 | } |
| 4691 | |
| 4692 | /* Exit now if the cell we're waiting for became non-nil. */ |
| 4693 | if (! NILP (wait_for_cell) && ! NILP (XCAR (wait_for_cell))) |
| 4694 | break; |
| 4695 | |
| 4696 | #ifdef SIGIO |
| 4697 | /* If we think we have keyboard input waiting, but didn't get SIGIO, |
| 4698 | go read it. This can happen with X on BSD after logging out. |
| 4699 | In that case, there really is no input and no SIGIO, |
| 4700 | but select says there is input. */ |
| 4701 | |
| 4702 | if (read_kbd && interrupt_input |
| 4703 | && keyboard_bit_set (&Available) && ! noninteractive) |
| 4704 | kill (getpid (), SIGIO); |
| 4705 | #endif |
| 4706 | |
| 4707 | if (! wait_proc) |
| 4708 | got_some_input |= nfds > 0; |
| 4709 | |
| 4710 | /* If checking input just got us a size-change event from X, |
| 4711 | obey it now if we should. */ |
| 4712 | if (read_kbd || ! NILP (wait_for_cell)) |
| 4713 | do_pending_window_change (0); |
| 4714 | |
| 4715 | /* Check for data from a process. */ |
| 4716 | if (no_avail || nfds == 0) |
| 4717 | continue; |
| 4718 | |
| 4719 | /* Really FIRST_PROC_DESC should be 0 on Unix, |
| 4720 | but this is safer in the short run. */ |
| 4721 | for (channel = 0; channel <= max_process_desc; channel++) |
| 4722 | { |
| 4723 | if (FD_ISSET (channel, &Available) |
| 4724 | && FD_ISSET (channel, &non_keyboard_wait_mask)) |
| 4725 | { |
| 4726 | int nread; |
| 4727 | |
| 4728 | /* If waiting for this channel, arrange to return as |
| 4729 | soon as no more input to be processed. No more |
| 4730 | waiting. */ |
| 4731 | if (wait_channel == channel) |
| 4732 | { |
| 4733 | wait_channel = -1; |
| 4734 | time_limit = -1; |
| 4735 | got_some_input = 1; |
| 4736 | } |
| 4737 | proc = chan_process[channel]; |
| 4738 | if (NILP (proc)) |
| 4739 | continue; |
| 4740 | |
| 4741 | /* If this is a server stream socket, accept connection. */ |
| 4742 | if (EQ (XPROCESS (proc)->status, Qlisten)) |
| 4743 | { |
| 4744 | server_accept_connection (proc, channel); |
| 4745 | continue; |
| 4746 | } |
| 4747 | |
| 4748 | /* Read data from the process, starting with our |
| 4749 | buffered-ahead character if we have one. */ |
| 4750 | |
| 4751 | nread = read_process_output (proc, channel); |
| 4752 | if (nread > 0) |
| 4753 | { |
| 4754 | /* Since read_process_output can run a filter, |
| 4755 | which can call accept-process-output, |
| 4756 | don't try to read from any other processes |
| 4757 | before doing the select again. */ |
| 4758 | FD_ZERO (&Available); |
| 4759 | |
| 4760 | if (do_display) |
| 4761 | redisplay_preserve_echo_area (12); |
| 4762 | } |
| 4763 | #ifdef EWOULDBLOCK |
| 4764 | else if (nread == -1 && errno == EWOULDBLOCK) |
| 4765 | ; |
| 4766 | #endif |
| 4767 | /* ISC 4.1 defines both EWOULDBLOCK and O_NONBLOCK, |
| 4768 | and Emacs uses O_NONBLOCK, so what we get is EAGAIN. */ |
| 4769 | #ifdef O_NONBLOCK |
| 4770 | else if (nread == -1 && errno == EAGAIN) |
| 4771 | ; |
| 4772 | #else |
| 4773 | #ifdef O_NDELAY |
| 4774 | else if (nread == -1 && errno == EAGAIN) |
| 4775 | ; |
| 4776 | /* Note that we cannot distinguish between no input |
| 4777 | available now and a closed pipe. |
| 4778 | With luck, a closed pipe will be accompanied by |
| 4779 | subprocess termination and SIGCHLD. */ |
| 4780 | else if (nread == 0 && !NETCONN_P (proc)) |
| 4781 | ; |
| 4782 | #endif /* O_NDELAY */ |
| 4783 | #endif /* O_NONBLOCK */ |
| 4784 | #ifdef HAVE_PTYS |
| 4785 | /* On some OSs with ptys, when the process on one end of |
| 4786 | a pty exits, the other end gets an error reading with |
| 4787 | errno = EIO instead of getting an EOF (0 bytes read). |
| 4788 | Therefore, if we get an error reading and errno = |
| 4789 | EIO, just continue, because the child process has |
| 4790 | exited and should clean itself up soon (e.g. when we |
| 4791 | get a SIGCHLD). |
| 4792 | |
| 4793 | However, it has been known to happen that the SIGCHLD |
| 4794 | got lost. So raise the signl again just in case. |
| 4795 | It can't hurt. */ |
| 4796 | else if (nread == -1 && errno == EIO) |
| 4797 | kill (getpid (), SIGCHLD); |
| 4798 | #endif /* HAVE_PTYS */ |
| 4799 | /* If we can detect process termination, don't consider the process |
| 4800 | gone just because its pipe is closed. */ |
| 4801 | #ifdef SIGCHLD |
| 4802 | else if (nread == 0 && !NETCONN_P (proc)) |
| 4803 | ; |
| 4804 | #endif |
| 4805 | else |
| 4806 | { |
| 4807 | /* Preserve status of processes already terminated. */ |
| 4808 | XSETINT (XPROCESS (proc)->tick, ++process_tick); |
| 4809 | deactivate_process (proc); |
| 4810 | if (XPROCESS (proc)->raw_status_new) |
| 4811 | update_status (XPROCESS (proc)); |
| 4812 | if (EQ (XPROCESS (proc)->status, Qrun)) |
| 4813 | XPROCESS (proc)->status |
| 4814 | = Fcons (Qexit, Fcons (make_number (256), Qnil)); |
| 4815 | } |
| 4816 | } |
| 4817 | #ifdef NON_BLOCKING_CONNECT |
| 4818 | if (check_connect && FD_ISSET (channel, &Connecting) |
| 4819 | && FD_ISSET (channel, &connect_wait_mask)) |
| 4820 | { |
| 4821 | struct Lisp_Process *p; |
| 4822 | |
| 4823 | FD_CLR (channel, &connect_wait_mask); |
| 4824 | if (--num_pending_connects < 0) |
| 4825 | abort (); |
| 4826 | |
| 4827 | proc = chan_process[channel]; |
| 4828 | if (NILP (proc)) |
| 4829 | continue; |
| 4830 | |
| 4831 | p = XPROCESS (proc); |
| 4832 | |
| 4833 | #ifdef GNU_LINUX |
| 4834 | /* getsockopt(,,SO_ERROR,,) is said to hang on some systems. |
| 4835 | So only use it on systems where it is known to work. */ |
| 4836 | { |
| 4837 | int xlen = sizeof(xerrno); |
| 4838 | if (getsockopt(channel, SOL_SOCKET, SO_ERROR, &xerrno, &xlen)) |
| 4839 | xerrno = errno; |
| 4840 | } |
| 4841 | #else |
| 4842 | { |
| 4843 | struct sockaddr pname; |
| 4844 | int pnamelen = sizeof(pname); |
| 4845 | |
| 4846 | /* If connection failed, getpeername will fail. */ |
| 4847 | xerrno = 0; |
| 4848 | if (getpeername(channel, &pname, &pnamelen) < 0) |
| 4849 | { |
| 4850 | /* Obtain connect failure code through error slippage. */ |
| 4851 | char dummy; |
| 4852 | xerrno = errno; |
| 4853 | if (errno == ENOTCONN && read(channel, &dummy, 1) < 0) |
| 4854 | xerrno = errno; |
| 4855 | } |
| 4856 | } |
| 4857 | #endif |
| 4858 | if (xerrno) |
| 4859 | { |
| 4860 | XSETINT (p->tick, ++process_tick); |
| 4861 | p->status = Fcons (Qfailed, Fcons (make_number (xerrno), Qnil)); |
| 4862 | deactivate_process (proc); |
| 4863 | } |
| 4864 | else |
| 4865 | { |
| 4866 | p->status = Qrun; |
| 4867 | /* Execute the sentinel here. If we had relied on |
| 4868 | status_notify to do it later, it will read input |
| 4869 | from the process before calling the sentinel. */ |
| 4870 | exec_sentinel (proc, build_string ("open\n")); |
| 4871 | if (!EQ (p->filter, Qt) && !EQ (p->command, Qt)) |
| 4872 | { |
| 4873 | FD_SET (XINT (p->infd), &input_wait_mask); |
| 4874 | FD_SET (XINT (p->infd), &non_keyboard_wait_mask); |
| 4875 | } |
| 4876 | } |
| 4877 | } |
| 4878 | #endif /* NON_BLOCKING_CONNECT */ |
| 4879 | } /* end for each file descriptor */ |
| 4880 | } /* end while exit conditions not met */ |
| 4881 | |
| 4882 | waiting_for_user_input_p = saved_waiting_for_user_input_p; |
| 4883 | |
| 4884 | /* If calling from keyboard input, do not quit |
| 4885 | since we want to return C-g as an input character. |
| 4886 | Otherwise, do pending quit if requested. */ |
| 4887 | if (read_kbd >= 0) |
| 4888 | { |
| 4889 | /* Prevent input_pending from remaining set if we quit. */ |
| 4890 | clear_input_pending (); |
| 4891 | QUIT; |
| 4892 | } |
| 4893 | #ifdef POLL_INTERRUPTED_SYS_CALL |
| 4894 | /* AlainF 5-Jul-1996 |
| 4895 | HP-UX 10.10 seems to have problems with signals coming in |
| 4896 | Causes "poll: interrupted system call" messages when Emacs is run |
| 4897 | in an X window |
| 4898 | Turn periodic alarms back on */ |
| 4899 | start_polling (); |
| 4900 | #endif /* POLL_INTERRUPTED_SYS_CALL */ |
| 4901 | |
| 4902 | return got_some_input; |
| 4903 | } |
| 4904 | \f |
| 4905 | /* Given a list (FUNCTION ARGS...), apply FUNCTION to the ARGS. */ |
| 4906 | |
| 4907 | static Lisp_Object |
| 4908 | read_process_output_call (fun_and_args) |
| 4909 | Lisp_Object fun_and_args; |
| 4910 | { |
| 4911 | return apply1 (XCAR (fun_and_args), XCDR (fun_and_args)); |
| 4912 | } |
| 4913 | |
| 4914 | static Lisp_Object |
| 4915 | read_process_output_error_handler (error) |
| 4916 | Lisp_Object error; |
| 4917 | { |
| 4918 | cmd_error_internal (error, "error in process filter: "); |
| 4919 | Vinhibit_quit = Qt; |
| 4920 | update_echo_area (); |
| 4921 | Fsleep_for (make_number (2), Qnil); |
| 4922 | return Qt; |
| 4923 | } |
| 4924 | |
| 4925 | /* Read pending output from the process channel, |
| 4926 | starting with our buffered-ahead character if we have one. |
| 4927 | Yield number of decoded characters read. |
| 4928 | |
| 4929 | This function reads at most 4096 characters. |
| 4930 | If you want to read all available subprocess output, |
| 4931 | you must call it repeatedly until it returns zero. |
| 4932 | |
| 4933 | The characters read are decoded according to PROC's coding-system |
| 4934 | for decoding. */ |
| 4935 | |
| 4936 | static int |
| 4937 | read_process_output (proc, channel) |
| 4938 | Lisp_Object proc; |
| 4939 | register int channel; |
| 4940 | { |
| 4941 | register int nbytes; |
| 4942 | char *chars; |
| 4943 | register Lisp_Object outstream; |
| 4944 | register struct buffer *old = current_buffer; |
| 4945 | register struct Lisp_Process *p = XPROCESS (proc); |
| 4946 | register int opoint; |
| 4947 | struct coding_system *coding = proc_decode_coding_system[channel]; |
| 4948 | int carryover = XINT (p->decoding_carryover); |
| 4949 | int readmax = 4096; |
| 4950 | |
| 4951 | #ifdef VMS |
| 4952 | VMS_PROC_STUFF *vs, *get_vms_process_pointer(); |
| 4953 | |
| 4954 | vs = get_vms_process_pointer (p->pid); |
| 4955 | if (vs) |
| 4956 | { |
| 4957 | if (!vs->iosb[0]) |
| 4958 | return (0); /* Really weird if it does this */ |
| 4959 | if (!(vs->iosb[0] & 1)) |
| 4960 | return -1; /* I/O error */ |
| 4961 | } |
| 4962 | else |
| 4963 | error ("Could not get VMS process pointer"); |
| 4964 | chars = vs->inputBuffer; |
| 4965 | nbytes = clean_vms_buffer (chars, vs->iosb[1]); |
| 4966 | if (nbytes <= 0) |
| 4967 | { |
| 4968 | start_vms_process_read (vs); /* Crank up the next read on the process */ |
| 4969 | return 1; /* Nothing worth printing, say we got 1 */ |
| 4970 | } |
| 4971 | if (carryover > 0) |
| 4972 | { |
| 4973 | /* The data carried over in the previous decoding (which are at |
| 4974 | the tail of decoding buffer) should be prepended to the new |
| 4975 | data read to decode all together. */ |
| 4976 | chars = (char *) alloca (nbytes + carryover); |
| 4977 | bcopy (SDATA (p->decoding_buf), buf, carryover); |
| 4978 | bcopy (vs->inputBuffer, chars + carryover, nbytes); |
| 4979 | } |
| 4980 | #else /* not VMS */ |
| 4981 | |
| 4982 | chars = (char *) alloca (carryover + readmax); |
| 4983 | if (carryover) |
| 4984 | /* See the comment above. */ |
| 4985 | bcopy (SDATA (p->decoding_buf), chars, carryover); |
| 4986 | |
| 4987 | #ifdef DATAGRAM_SOCKETS |
| 4988 | /* We have a working select, so proc_buffered_char is always -1. */ |
| 4989 | if (DATAGRAM_CHAN_P (channel)) |
| 4990 | { |
| 4991 | int len = datagram_address[channel].len; |
| 4992 | nbytes = recvfrom (channel, chars + carryover, readmax, |
| 4993 | 0, datagram_address[channel].sa, &len); |
| 4994 | } |
| 4995 | else |
| 4996 | #endif |
| 4997 | if (proc_buffered_char[channel] < 0) |
| 4998 | { |
| 4999 | nbytes = emacs_read (channel, chars + carryover, readmax); |
| 5000 | #ifdef ADAPTIVE_READ_BUFFERING |
| 5001 | if (nbytes > 0 && !NILP (p->adaptive_read_buffering)) |
| 5002 | { |
| 5003 | int delay = XINT (p->read_output_delay); |
| 5004 | if (nbytes < 256) |
| 5005 | { |
| 5006 | if (delay < READ_OUTPUT_DELAY_MAX_MAX) |
| 5007 | { |
| 5008 | if (delay == 0) |
| 5009 | process_output_delay_count++; |
| 5010 | delay += READ_OUTPUT_DELAY_INCREMENT * 2; |
| 5011 | } |
| 5012 | } |
| 5013 | else if (delay > 0 && (nbytes == readmax)) |
| 5014 | { |
| 5015 | delay -= READ_OUTPUT_DELAY_INCREMENT; |
| 5016 | if (delay == 0) |
| 5017 | process_output_delay_count--; |
| 5018 | } |
| 5019 | XSETINT (p->read_output_delay, delay); |
| 5020 | if (delay) |
| 5021 | { |
| 5022 | p->read_output_skip = Qt; |
| 5023 | process_output_skip = 1; |
| 5024 | } |
| 5025 | } |
| 5026 | #endif |
| 5027 | } |
| 5028 | else |
| 5029 | { |
| 5030 | chars[carryover] = proc_buffered_char[channel]; |
| 5031 | proc_buffered_char[channel] = -1; |
| 5032 | nbytes = emacs_read (channel, chars + carryover + 1, readmax - 1); |
| 5033 | if (nbytes < 0) |
| 5034 | nbytes = 1; |
| 5035 | else |
| 5036 | nbytes = nbytes + 1; |
| 5037 | } |
| 5038 | #endif /* not VMS */ |
| 5039 | |
| 5040 | XSETINT (p->decoding_carryover, 0); |
| 5041 | |
| 5042 | /* At this point, NBYTES holds number of bytes just received |
| 5043 | (including the one in proc_buffered_char[channel]). */ |
| 5044 | if (nbytes <= 0) |
| 5045 | { |
| 5046 | if (nbytes < 0 || coding->mode & CODING_MODE_LAST_BLOCK) |
| 5047 | return nbytes; |
| 5048 | coding->mode |= CODING_MODE_LAST_BLOCK; |
| 5049 | } |
| 5050 | |
| 5051 | /* Now set NBYTES how many bytes we must decode. */ |
| 5052 | nbytes += carryover; |
| 5053 | |
| 5054 | /* Read and dispose of the process output. */ |
| 5055 | outstream = p->filter; |
| 5056 | if (!NILP (outstream)) |
| 5057 | { |
| 5058 | /* We inhibit quit here instead of just catching it so that |
| 5059 | hitting ^G when a filter happens to be running won't screw |
| 5060 | it up. */ |
| 5061 | int count = SPECPDL_INDEX (); |
| 5062 | Lisp_Object odeactivate; |
| 5063 | Lisp_Object obuffer, okeymap; |
| 5064 | Lisp_Object text; |
| 5065 | int outer_running_asynch_code = running_asynch_code; |
| 5066 | int waiting = waiting_for_user_input_p; |
| 5067 | |
| 5068 | /* No need to gcpro these, because all we do with them later |
| 5069 | is test them for EQness, and none of them should be a string. */ |
| 5070 | odeactivate = Vdeactivate_mark; |
| 5071 | XSETBUFFER (obuffer, current_buffer); |
| 5072 | okeymap = current_buffer->keymap; |
| 5073 | |
| 5074 | specbind (Qinhibit_quit, Qt); |
| 5075 | specbind (Qlast_nonmenu_event, Qt); |
| 5076 | |
| 5077 | /* In case we get recursively called, |
| 5078 | and we already saved the match data nonrecursively, |
| 5079 | save the same match data in safely recursive fashion. */ |
| 5080 | if (outer_running_asynch_code) |
| 5081 | { |
| 5082 | Lisp_Object tem; |
| 5083 | /* Don't clobber the CURRENT match data, either! */ |
| 5084 | tem = Fmatch_data (Qnil, Qnil, Qnil); |
| 5085 | restore_search_regs (); |
| 5086 | record_unwind_save_match_data (); |
| 5087 | Fset_match_data (tem, Qt); |
| 5088 | } |
| 5089 | |
| 5090 | /* For speed, if a search happens within this code, |
| 5091 | save the match data in a special nonrecursive fashion. */ |
| 5092 | running_asynch_code = 1; |
| 5093 | |
| 5094 | text = decode_coding_string (make_unibyte_string (chars, nbytes), |
| 5095 | coding, 0); |
| 5096 | Vlast_coding_system_used = coding->symbol; |
| 5097 | /* A new coding system might be found. */ |
| 5098 | if (!EQ (p->decode_coding_system, coding->symbol)) |
| 5099 | { |
| 5100 | p->decode_coding_system = coding->symbol; |
| 5101 | |
| 5102 | /* Don't call setup_coding_system for |
| 5103 | proc_decode_coding_system[channel] here. It is done in |
| 5104 | detect_coding called via decode_coding above. */ |
| 5105 | |
| 5106 | /* If a coding system for encoding is not yet decided, we set |
| 5107 | it as the same as coding-system for decoding. |
| 5108 | |
| 5109 | But, before doing that we must check if |
| 5110 | proc_encode_coding_system[p->outfd] surely points to a |
| 5111 | valid memory because p->outfd will be changed once EOF is |
| 5112 | sent to the process. */ |
| 5113 | if (NILP (p->encode_coding_system) |
| 5114 | && proc_encode_coding_system[XINT (p->outfd)]) |
| 5115 | { |
| 5116 | p->encode_coding_system = coding->symbol; |
| 5117 | setup_coding_system (coding->symbol, |
| 5118 | proc_encode_coding_system[XINT (p->outfd)]); |
| 5119 | if (proc_encode_coding_system[XINT (p->outfd)]->eol_type |
| 5120 | == CODING_EOL_UNDECIDED) |
| 5121 | proc_encode_coding_system[XINT (p->outfd)]->eol_type |
| 5122 | = system_eol_type; |
| 5123 | } |
| 5124 | } |
| 5125 | |
| 5126 | carryover = nbytes - coding->consumed; |
| 5127 | if (SCHARS (p->decoding_buf) < carryover) |
| 5128 | p->decoding_buf = make_uninit_string (carryover); |
| 5129 | bcopy (chars + coding->consumed, SDATA (p->decoding_buf), |
| 5130 | carryover); |
| 5131 | XSETINT (p->decoding_carryover, carryover); |
| 5132 | /* Adjust the multibyteness of TEXT to that of the filter. */ |
| 5133 | if (NILP (p->filter_multibyte) != ! STRING_MULTIBYTE (text)) |
| 5134 | text = (STRING_MULTIBYTE (text) |
| 5135 | ? Fstring_as_unibyte (text) |
| 5136 | : Fstring_to_multibyte (text)); |
| 5137 | if (SBYTES (text) > 0) |
| 5138 | internal_condition_case_1 (read_process_output_call, |
| 5139 | Fcons (outstream, |
| 5140 | Fcons (proc, Fcons (text, Qnil))), |
| 5141 | !NILP (Vdebug_on_error) ? Qnil : Qerror, |
| 5142 | read_process_output_error_handler); |
| 5143 | |
| 5144 | /* If we saved the match data nonrecursively, restore it now. */ |
| 5145 | restore_search_regs (); |
| 5146 | running_asynch_code = outer_running_asynch_code; |
| 5147 | |
| 5148 | /* Handling the process output should not deactivate the mark. */ |
| 5149 | Vdeactivate_mark = odeactivate; |
| 5150 | |
| 5151 | /* Restore waiting_for_user_input_p as it was |
| 5152 | when we were called, in case the filter clobbered it. */ |
| 5153 | waiting_for_user_input_p = waiting; |
| 5154 | |
| 5155 | #if 0 /* Call record_asynch_buffer_change unconditionally, |
| 5156 | because we might have changed minor modes or other things |
| 5157 | that affect key bindings. */ |
| 5158 | if (! EQ (Fcurrent_buffer (), obuffer) |
| 5159 | || ! EQ (current_buffer->keymap, okeymap)) |
| 5160 | #endif |
| 5161 | /* But do it only if the caller is actually going to read events. |
| 5162 | Otherwise there's no need to make him wake up, and it could |
| 5163 | cause trouble (for example it would make sit_for return). */ |
| 5164 | if (waiting_for_user_input_p == -1) |
| 5165 | record_asynch_buffer_change (); |
| 5166 | |
| 5167 | #ifdef VMS |
| 5168 | start_vms_process_read (vs); |
| 5169 | #endif |
| 5170 | unbind_to (count, Qnil); |
| 5171 | return nbytes; |
| 5172 | } |
| 5173 | |
| 5174 | /* If no filter, write into buffer if it isn't dead. */ |
| 5175 | if (!NILP (p->buffer) && !NILP (XBUFFER (p->buffer)->name)) |
| 5176 | { |
| 5177 | Lisp_Object old_read_only; |
| 5178 | int old_begv, old_zv; |
| 5179 | int old_begv_byte, old_zv_byte; |
| 5180 | Lisp_Object odeactivate; |
| 5181 | int before, before_byte; |
| 5182 | int opoint_byte; |
| 5183 | Lisp_Object text; |
| 5184 | struct buffer *b; |
| 5185 | |
| 5186 | odeactivate = Vdeactivate_mark; |
| 5187 | |
| 5188 | Fset_buffer (p->buffer); |
| 5189 | opoint = PT; |
| 5190 | opoint_byte = PT_BYTE; |
| 5191 | old_read_only = current_buffer->read_only; |
| 5192 | old_begv = BEGV; |
| 5193 | old_zv = ZV; |
| 5194 | old_begv_byte = BEGV_BYTE; |
| 5195 | old_zv_byte = ZV_BYTE; |
| 5196 | |
| 5197 | current_buffer->read_only = Qnil; |
| 5198 | |
| 5199 | /* Insert new output into buffer |
| 5200 | at the current end-of-output marker, |
| 5201 | thus preserving logical ordering of input and output. */ |
| 5202 | if (XMARKER (p->mark)->buffer) |
| 5203 | SET_PT_BOTH (clip_to_bounds (BEGV, marker_position (p->mark), ZV), |
| 5204 | clip_to_bounds (BEGV_BYTE, marker_byte_position (p->mark), |
| 5205 | ZV_BYTE)); |
| 5206 | else |
| 5207 | SET_PT_BOTH (ZV, ZV_BYTE); |
| 5208 | before = PT; |
| 5209 | before_byte = PT_BYTE; |
| 5210 | |
| 5211 | /* If the output marker is outside of the visible region, save |
| 5212 | the restriction and widen. */ |
| 5213 | if (! (BEGV <= PT && PT <= ZV)) |
| 5214 | Fwiden (); |
| 5215 | |
| 5216 | text = decode_coding_string (make_unibyte_string (chars, nbytes), |
| 5217 | coding, 0); |
| 5218 | Vlast_coding_system_used = coding->symbol; |
| 5219 | /* A new coding system might be found. See the comment in the |
| 5220 | similar code in the previous `if' block. */ |
| 5221 | if (!EQ (p->decode_coding_system, coding->symbol)) |
| 5222 | { |
| 5223 | p->decode_coding_system = coding->symbol; |
| 5224 | if (NILP (p->encode_coding_system) |
| 5225 | && proc_encode_coding_system[XINT (p->outfd)]) |
| 5226 | { |
| 5227 | p->encode_coding_system = coding->symbol; |
| 5228 | setup_coding_system (coding->symbol, |
| 5229 | proc_encode_coding_system[XINT (p->outfd)]); |
| 5230 | if (proc_encode_coding_system[XINT (p->outfd)]->eol_type |
| 5231 | == CODING_EOL_UNDECIDED) |
| 5232 | proc_encode_coding_system[XINT (p->outfd)]->eol_type |
| 5233 | = system_eol_type; |
| 5234 | } |
| 5235 | } |
| 5236 | carryover = nbytes - coding->consumed; |
| 5237 | if (SCHARS (p->decoding_buf) < carryover) |
| 5238 | p->decoding_buf = make_uninit_string (carryover); |
| 5239 | bcopy (chars + coding->consumed, SDATA (p->decoding_buf), |
| 5240 | carryover); |
| 5241 | XSETINT (p->decoding_carryover, carryover); |
| 5242 | /* Adjust the multibyteness of TEXT to that of the buffer. */ |
| 5243 | if (NILP (current_buffer->enable_multibyte_characters) |
| 5244 | != ! STRING_MULTIBYTE (text)) |
| 5245 | text = (STRING_MULTIBYTE (text) |
| 5246 | ? Fstring_as_unibyte (text) |
| 5247 | : Fstring_to_multibyte (text)); |
| 5248 | /* Insert before markers in case we are inserting where |
| 5249 | the buffer's mark is, and the user's next command is Meta-y. */ |
| 5250 | insert_from_string_before_markers (text, 0, 0, |
| 5251 | SCHARS (text), SBYTES (text), 0); |
| 5252 | |
| 5253 | /* Make sure the process marker's position is valid when the |
| 5254 | process buffer is changed in the signal_after_change above. |
| 5255 | W3 is known to do that. */ |
| 5256 | if (BUFFERP (p->buffer) |
| 5257 | && (b = XBUFFER (p->buffer), b != current_buffer)) |
| 5258 | set_marker_both (p->mark, p->buffer, BUF_PT (b), BUF_PT_BYTE (b)); |
| 5259 | else |
| 5260 | set_marker_both (p->mark, p->buffer, PT, PT_BYTE); |
| 5261 | |
| 5262 | update_mode_lines++; |
| 5263 | |
| 5264 | /* Make sure opoint and the old restrictions |
| 5265 | float ahead of any new text just as point would. */ |
| 5266 | if (opoint >= before) |
| 5267 | { |
| 5268 | opoint += PT - before; |
| 5269 | opoint_byte += PT_BYTE - before_byte; |
| 5270 | } |
| 5271 | if (old_begv > before) |
| 5272 | { |
| 5273 | old_begv += PT - before; |
| 5274 | old_begv_byte += PT_BYTE - before_byte; |
| 5275 | } |
| 5276 | if (old_zv >= before) |
| 5277 | { |
| 5278 | old_zv += PT - before; |
| 5279 | old_zv_byte += PT_BYTE - before_byte; |
| 5280 | } |
| 5281 | |
| 5282 | /* If the restriction isn't what it should be, set it. */ |
| 5283 | if (old_begv != BEGV || old_zv != ZV) |
| 5284 | Fnarrow_to_region (make_number (old_begv), make_number (old_zv)); |
| 5285 | |
| 5286 | /* Handling the process output should not deactivate the mark. */ |
| 5287 | Vdeactivate_mark = odeactivate; |
| 5288 | |
| 5289 | current_buffer->read_only = old_read_only; |
| 5290 | SET_PT_BOTH (opoint, opoint_byte); |
| 5291 | set_buffer_internal (old); |
| 5292 | } |
| 5293 | #ifdef VMS |
| 5294 | start_vms_process_read (vs); |
| 5295 | #endif |
| 5296 | return nbytes; |
| 5297 | } |
| 5298 | |
| 5299 | DEFUN ("waiting-for-user-input-p", Fwaiting_for_user_input_p, Swaiting_for_user_input_p, |
| 5300 | 0, 0, 0, |
| 5301 | doc: /* Returns non-nil if Emacs is waiting for input from the user. |
| 5302 | This is intended for use by asynchronous process output filters and sentinels. */) |
| 5303 | () |
| 5304 | { |
| 5305 | return (waiting_for_user_input_p ? Qt : Qnil); |
| 5306 | } |
| 5307 | \f |
| 5308 | /* Sending data to subprocess */ |
| 5309 | |
| 5310 | jmp_buf send_process_frame; |
| 5311 | Lisp_Object process_sent_to; |
| 5312 | |
| 5313 | SIGTYPE |
| 5314 | send_process_trap () |
| 5315 | { |
| 5316 | SIGNAL_THREAD_CHECK (SIGPIPE); |
| 5317 | #ifdef BSD4_1 |
| 5318 | sigrelse (SIGPIPE); |
| 5319 | sigrelse (SIGALRM); |
| 5320 | #endif /* BSD4_1 */ |
| 5321 | sigunblock (sigmask (SIGPIPE)); |
| 5322 | longjmp (send_process_frame, 1); |
| 5323 | } |
| 5324 | |
| 5325 | /* Send some data to process PROC. |
| 5326 | BUF is the beginning of the data; LEN is the number of characters. |
| 5327 | OBJECT is the Lisp object that the data comes from. If OBJECT is |
| 5328 | nil or t, it means that the data comes from C string. |
| 5329 | |
| 5330 | If OBJECT is not nil, the data is encoded by PROC's coding-system |
| 5331 | for encoding before it is sent. |
| 5332 | |
| 5333 | This function can evaluate Lisp code and can garbage collect. */ |
| 5334 | |
| 5335 | static void |
| 5336 | send_process (proc, buf, len, object) |
| 5337 | volatile Lisp_Object proc; |
| 5338 | unsigned char *volatile buf; |
| 5339 | volatile int len; |
| 5340 | volatile Lisp_Object object; |
| 5341 | { |
| 5342 | /* Use volatile to protect variables from being clobbered by longjmp. */ |
| 5343 | struct Lisp_Process *p = XPROCESS (proc); |
| 5344 | int rv; |
| 5345 | struct coding_system *coding; |
| 5346 | struct gcpro gcpro1; |
| 5347 | SIGTYPE (*volatile old_sigpipe) (); |
| 5348 | |
| 5349 | GCPRO1 (object); |
| 5350 | |
| 5351 | #ifdef VMS |
| 5352 | VMS_PROC_STUFF *vs, *get_vms_process_pointer(); |
| 5353 | #endif /* VMS */ |
| 5354 | |
| 5355 | if (p->raw_status_new) |
| 5356 | update_status (p); |
| 5357 | if (! EQ (p->status, Qrun)) |
| 5358 | error ("Process %s not running", SDATA (p->name)); |
| 5359 | if (XINT (p->outfd) < 0) |
| 5360 | error ("Output file descriptor of %s is closed", SDATA (p->name)); |
| 5361 | |
| 5362 | coding = proc_encode_coding_system[XINT (p->outfd)]; |
| 5363 | Vlast_coding_system_used = coding->symbol; |
| 5364 | |
| 5365 | if ((STRINGP (object) && STRING_MULTIBYTE (object)) |
| 5366 | || (BUFFERP (object) |
| 5367 | && !NILP (XBUFFER (object)->enable_multibyte_characters)) |
| 5368 | || EQ (object, Qt)) |
| 5369 | { |
| 5370 | if (!EQ (coding->symbol, p->encode_coding_system)) |
| 5371 | /* The coding system for encoding was changed to raw-text |
| 5372 | because we sent a unibyte text previously. Now we are |
| 5373 | sending a multibyte text, thus we must encode it by the |
| 5374 | original coding system specified for the current process. */ |
| 5375 | setup_coding_system (p->encode_coding_system, coding); |
| 5376 | if (coding->eol_type == CODING_EOL_UNDECIDED) |
| 5377 | coding->eol_type = system_eol_type; |
| 5378 | /* src_multibyte should be set to 1 _after_ a call to |
| 5379 | setup_coding_system, since it resets src_multibyte to |
| 5380 | zero. */ |
| 5381 | coding->src_multibyte = 1; |
| 5382 | } |
| 5383 | else |
| 5384 | { |
| 5385 | /* For sending a unibyte text, character code conversion should |
| 5386 | not take place but EOL conversion should. So, setup raw-text |
| 5387 | or one of the subsidiary if we have not yet done it. */ |
| 5388 | if (coding->type != coding_type_raw_text) |
| 5389 | { |
| 5390 | if (CODING_REQUIRE_FLUSHING (coding)) |
| 5391 | { |
| 5392 | /* But, before changing the coding, we must flush out data. */ |
| 5393 | coding->mode |= CODING_MODE_LAST_BLOCK; |
| 5394 | send_process (proc, "", 0, Qt); |
| 5395 | } |
| 5396 | coding->src_multibyte = 0; |
| 5397 | setup_raw_text_coding_system (coding); |
| 5398 | } |
| 5399 | } |
| 5400 | coding->dst_multibyte = 0; |
| 5401 | |
| 5402 | if (CODING_REQUIRE_ENCODING (coding)) |
| 5403 | { |
| 5404 | int require = encoding_buffer_size (coding, len); |
| 5405 | int from_byte = -1, from = -1, to = -1; |
| 5406 | |
| 5407 | if (BUFFERP (object)) |
| 5408 | { |
| 5409 | from_byte = BUF_PTR_BYTE_POS (XBUFFER (object), buf); |
| 5410 | from = buf_bytepos_to_charpos (XBUFFER (object), from_byte); |
| 5411 | to = buf_bytepos_to_charpos (XBUFFER (object), from_byte + len); |
| 5412 | } |
| 5413 | else if (STRINGP (object)) |
| 5414 | { |
| 5415 | from_byte = buf - SDATA (object); |
| 5416 | from = string_byte_to_char (object, from_byte); |
| 5417 | to = string_byte_to_char (object, from_byte + len); |
| 5418 | } |
| 5419 | |
| 5420 | if (coding->composing != COMPOSITION_DISABLED) |
| 5421 | { |
| 5422 | if (from_byte >= 0) |
| 5423 | coding_save_composition (coding, from, to, object); |
| 5424 | else |
| 5425 | coding->composing = COMPOSITION_DISABLED; |
| 5426 | } |
| 5427 | |
| 5428 | if (SBYTES (p->encoding_buf) < require) |
| 5429 | p->encoding_buf = make_uninit_string (require); |
| 5430 | |
| 5431 | if (from_byte >= 0) |
| 5432 | buf = (BUFFERP (object) |
| 5433 | ? BUF_BYTE_ADDRESS (XBUFFER (object), from_byte) |
| 5434 | : SDATA (object) + from_byte); |
| 5435 | |
| 5436 | object = p->encoding_buf; |
| 5437 | encode_coding (coding, (char *) buf, SDATA (object), |
| 5438 | len, SBYTES (object)); |
| 5439 | coding_free_composition_data (coding); |
| 5440 | len = coding->produced; |
| 5441 | buf = SDATA (object); |
| 5442 | } |
| 5443 | |
| 5444 | #ifdef VMS |
| 5445 | vs = get_vms_process_pointer (p->pid); |
| 5446 | if (vs == 0) |
| 5447 | error ("Could not find this process: %x", p->pid); |
| 5448 | else if (write_to_vms_process (vs, buf, len)) |
| 5449 | ; |
| 5450 | #else /* not VMS */ |
| 5451 | |
| 5452 | if (pty_max_bytes == 0) |
| 5453 | { |
| 5454 | #if defined (HAVE_FPATHCONF) && defined (_PC_MAX_CANON) |
| 5455 | pty_max_bytes = fpathconf (XFASTINT (p->outfd), _PC_MAX_CANON); |
| 5456 | if (pty_max_bytes < 0) |
| 5457 | pty_max_bytes = 250; |
| 5458 | #else |
| 5459 | pty_max_bytes = 250; |
| 5460 | #endif |
| 5461 | /* Deduct one, to leave space for the eof. */ |
| 5462 | pty_max_bytes--; |
| 5463 | } |
| 5464 | |
| 5465 | /* 2000-09-21: Emacs 20.7, sparc-sun-solaris-2.6, GCC 2.95.2, |
| 5466 | CFLAGS="-g -O": The value of the parameter `proc' is clobbered |
| 5467 | when returning with longjmp despite being declared volatile. */ |
| 5468 | if (!setjmp (send_process_frame)) |
| 5469 | { |
| 5470 | process_sent_to = proc; |
| 5471 | while (len > 0) |
| 5472 | { |
| 5473 | int this = len; |
| 5474 | |
| 5475 | /* Decide how much data we can send in one batch. |
| 5476 | Long lines need to be split into multiple batches. */ |
| 5477 | if (!NILP (p->pty_flag)) |
| 5478 | { |
| 5479 | /* Starting this at zero is always correct when not the first |
| 5480 | iteration because the previous iteration ended by sending C-d. |
| 5481 | It may not be correct for the first iteration |
| 5482 | if a partial line was sent in a separate send_process call. |
| 5483 | If that proves worth handling, we need to save linepos |
| 5484 | in the process object. */ |
| 5485 | int linepos = 0; |
| 5486 | unsigned char *ptr = (unsigned char *) buf; |
| 5487 | unsigned char *end = (unsigned char *) buf + len; |
| 5488 | |
| 5489 | /* Scan through this text for a line that is too long. */ |
| 5490 | while (ptr != end && linepos < pty_max_bytes) |
| 5491 | { |
| 5492 | if (*ptr == '\n') |
| 5493 | linepos = 0; |
| 5494 | else |
| 5495 | linepos++; |
| 5496 | ptr++; |
| 5497 | } |
| 5498 | /* If we found one, break the line there |
| 5499 | and put in a C-d to force the buffer through. */ |
| 5500 | this = ptr - buf; |
| 5501 | } |
| 5502 | |
| 5503 | /* Send this batch, using one or more write calls. */ |
| 5504 | while (this > 0) |
| 5505 | { |
| 5506 | int outfd = XINT (p->outfd); |
| 5507 | old_sigpipe = (SIGTYPE (*) ()) signal (SIGPIPE, send_process_trap); |
| 5508 | #ifdef DATAGRAM_SOCKETS |
| 5509 | if (DATAGRAM_CHAN_P (outfd)) |
| 5510 | { |
| 5511 | rv = sendto (outfd, (char *) buf, this, |
| 5512 | 0, datagram_address[outfd].sa, |
| 5513 | datagram_address[outfd].len); |
| 5514 | if (rv < 0 && errno == EMSGSIZE) |
| 5515 | { |
| 5516 | signal (SIGPIPE, old_sigpipe); |
| 5517 | report_file_error ("sending datagram", |
| 5518 | Fcons (proc, Qnil)); |
| 5519 | } |
| 5520 | } |
| 5521 | else |
| 5522 | #endif |
| 5523 | { |
| 5524 | rv = emacs_write (outfd, (char *) buf, this); |
| 5525 | #ifdef ADAPTIVE_READ_BUFFERING |
| 5526 | if (XINT (p->read_output_delay) > 0 |
| 5527 | && EQ (p->adaptive_read_buffering, Qt)) |
| 5528 | { |
| 5529 | XSETFASTINT (p->read_output_delay, 0); |
| 5530 | process_output_delay_count--; |
| 5531 | p->read_output_skip = Qnil; |
| 5532 | } |
| 5533 | #endif |
| 5534 | } |
| 5535 | signal (SIGPIPE, old_sigpipe); |
| 5536 | |
| 5537 | if (rv < 0) |
| 5538 | { |
| 5539 | if (0 |
| 5540 | #ifdef EWOULDBLOCK |
| 5541 | || errno == EWOULDBLOCK |
| 5542 | #endif |
| 5543 | #ifdef EAGAIN |
| 5544 | || errno == EAGAIN |
| 5545 | #endif |
| 5546 | ) |
| 5547 | /* Buffer is full. Wait, accepting input; |
| 5548 | that may allow the program |
| 5549 | to finish doing output and read more. */ |
| 5550 | { |
| 5551 | int offset = 0; |
| 5552 | |
| 5553 | #ifdef BROKEN_PTY_READ_AFTER_EAGAIN |
| 5554 | /* A gross hack to work around a bug in FreeBSD. |
| 5555 | In the following sequence, read(2) returns |
| 5556 | bogus data: |
| 5557 | |
| 5558 | write(2) 1022 bytes |
| 5559 | write(2) 954 bytes, get EAGAIN |
| 5560 | read(2) 1024 bytes in process_read_output |
| 5561 | read(2) 11 bytes in process_read_output |
| 5562 | |
| 5563 | That is, read(2) returns more bytes than have |
| 5564 | ever been written successfully. The 1033 bytes |
| 5565 | read are the 1022 bytes written successfully |
| 5566 | after processing (for example with CRs added if |
| 5567 | the terminal is set up that way which it is |
| 5568 | here). The same bytes will be seen again in a |
| 5569 | later read(2), without the CRs. */ |
| 5570 | |
| 5571 | if (errno == EAGAIN) |
| 5572 | { |
| 5573 | int flags = FWRITE; |
| 5574 | ioctl (XINT (p->outfd), TIOCFLUSH, &flags); |
| 5575 | } |
| 5576 | #endif /* BROKEN_PTY_READ_AFTER_EAGAIN */ |
| 5577 | |
| 5578 | /* Running filters might relocate buffers or strings. |
| 5579 | Arrange to relocate BUF. */ |
| 5580 | if (BUFFERP (object)) |
| 5581 | offset = BUF_PTR_BYTE_POS (XBUFFER (object), buf); |
| 5582 | else if (STRINGP (object)) |
| 5583 | offset = buf - SDATA (object); |
| 5584 | |
| 5585 | #ifdef EMACS_HAS_USECS |
| 5586 | wait_reading_process_output (0, 20000, 0, 0, Qnil, NULL, 0); |
| 5587 | #else |
| 5588 | wait_reading_process_output (1, 0, 0, 0, Qnil, NULL, 0); |
| 5589 | #endif |
| 5590 | |
| 5591 | if (BUFFERP (object)) |
| 5592 | buf = BUF_BYTE_ADDRESS (XBUFFER (object), offset); |
| 5593 | else if (STRINGP (object)) |
| 5594 | buf = offset + SDATA (object); |
| 5595 | |
| 5596 | rv = 0; |
| 5597 | } |
| 5598 | else |
| 5599 | /* This is a real error. */ |
| 5600 | report_file_error ("writing to process", Fcons (proc, Qnil)); |
| 5601 | } |
| 5602 | buf += rv; |
| 5603 | len -= rv; |
| 5604 | this -= rv; |
| 5605 | } |
| 5606 | |
| 5607 | /* If we sent just part of the string, put in an EOF |
| 5608 | to force it through, before we send the rest. */ |
| 5609 | if (len > 0) |
| 5610 | Fprocess_send_eof (proc); |
| 5611 | } |
| 5612 | } |
| 5613 | #endif /* not VMS */ |
| 5614 | else |
| 5615 | { |
| 5616 | signal (SIGPIPE, old_sigpipe); |
| 5617 | #ifndef VMS |
| 5618 | proc = process_sent_to; |
| 5619 | p = XPROCESS (proc); |
| 5620 | #endif |
| 5621 | p->raw_status_new = 0; |
| 5622 | p->status = Fcons (Qexit, Fcons (make_number (256), Qnil)); |
| 5623 | XSETINT (p->tick, ++process_tick); |
| 5624 | deactivate_process (proc); |
| 5625 | #ifdef VMS |
| 5626 | error ("Error writing to process %s; closed it", SDATA (p->name)); |
| 5627 | #else |
| 5628 | error ("SIGPIPE raised on process %s; closed it", SDATA (p->name)); |
| 5629 | #endif |
| 5630 | } |
| 5631 | |
| 5632 | UNGCPRO; |
| 5633 | } |
| 5634 | |
| 5635 | DEFUN ("process-send-region", Fprocess_send_region, Sprocess_send_region, |
| 5636 | 3, 3, 0, |
| 5637 | doc: /* Send current contents of region as input to PROCESS. |
| 5638 | PROCESS may be a process, a buffer, the name of a process or buffer, or |
| 5639 | nil, indicating the current buffer's process. |
| 5640 | Called from program, takes three arguments, PROCESS, START and END. |
| 5641 | If the region is more than 500 characters long, |
| 5642 | it is sent in several bunches. This may happen even for shorter regions. |
| 5643 | Output from processes can arrive in between bunches. */) |
| 5644 | (process, start, end) |
| 5645 | Lisp_Object process, start, end; |
| 5646 | { |
| 5647 | Lisp_Object proc; |
| 5648 | int start1, end1; |
| 5649 | |
| 5650 | proc = get_process (process); |
| 5651 | validate_region (&start, &end); |
| 5652 | |
| 5653 | if (XINT (start) < GPT && XINT (end) > GPT) |
| 5654 | move_gap (XINT (start)); |
| 5655 | |
| 5656 | start1 = CHAR_TO_BYTE (XINT (start)); |
| 5657 | end1 = CHAR_TO_BYTE (XINT (end)); |
| 5658 | send_process (proc, BYTE_POS_ADDR (start1), end1 - start1, |
| 5659 | Fcurrent_buffer ()); |
| 5660 | |
| 5661 | return Qnil; |
| 5662 | } |
| 5663 | |
| 5664 | DEFUN ("process-send-string", Fprocess_send_string, Sprocess_send_string, |
| 5665 | 2, 2, 0, |
| 5666 | doc: /* Send PROCESS the contents of STRING as input. |
| 5667 | PROCESS may be a process, a buffer, the name of a process or buffer, or |
| 5668 | nil, indicating the current buffer's process. |
| 5669 | If STRING is more than 500 characters long, |
| 5670 | it is sent in several bunches. This may happen even for shorter strings. |
| 5671 | Output from processes can arrive in between bunches. */) |
| 5672 | (process, string) |
| 5673 | Lisp_Object process, string; |
| 5674 | { |
| 5675 | Lisp_Object proc; |
| 5676 | CHECK_STRING (string); |
| 5677 | proc = get_process (process); |
| 5678 | send_process (proc, SDATA (string), |
| 5679 | SBYTES (string), string); |
| 5680 | return Qnil; |
| 5681 | } |
| 5682 | \f |
| 5683 | /* Return the foreground process group for the tty/pty that |
| 5684 | the process P uses. */ |
| 5685 | static int |
| 5686 | emacs_get_tty_pgrp (p) |
| 5687 | struct Lisp_Process *p; |
| 5688 | { |
| 5689 | int gid = -1; |
| 5690 | |
| 5691 | #ifdef TIOCGPGRP |
| 5692 | if (ioctl (XINT (p->infd), TIOCGPGRP, &gid) == -1 && ! NILP (p->tty_name)) |
| 5693 | { |
| 5694 | int fd; |
| 5695 | /* Some OS:es (Solaris 8/9) does not allow TIOCGPGRP from the |
| 5696 | master side. Try the slave side. */ |
| 5697 | fd = emacs_open (XSTRING (p->tty_name)->data, O_RDONLY, 0); |
| 5698 | |
| 5699 | if (fd != -1) |
| 5700 | { |
| 5701 | ioctl (fd, TIOCGPGRP, &gid); |
| 5702 | emacs_close (fd); |
| 5703 | } |
| 5704 | } |
| 5705 | #endif /* defined (TIOCGPGRP ) */ |
| 5706 | |
| 5707 | return gid; |
| 5708 | } |
| 5709 | |
| 5710 | DEFUN ("process-running-child-p", Fprocess_running_child_p, |
| 5711 | Sprocess_running_child_p, 0, 1, 0, |
| 5712 | doc: /* Return t if PROCESS has given the terminal to a child. |
| 5713 | If the operating system does not make it possible to find out, |
| 5714 | return t unconditionally. */) |
| 5715 | (process) |
| 5716 | Lisp_Object process; |
| 5717 | { |
| 5718 | /* Initialize in case ioctl doesn't exist or gives an error, |
| 5719 | in a way that will cause returning t. */ |
| 5720 | int gid; |
| 5721 | Lisp_Object proc; |
| 5722 | struct Lisp_Process *p; |
| 5723 | |
| 5724 | proc = get_process (process); |
| 5725 | p = XPROCESS (proc); |
| 5726 | |
| 5727 | if (!EQ (p->childp, Qt)) |
| 5728 | error ("Process %s is not a subprocess", |
| 5729 | SDATA (p->name)); |
| 5730 | if (XINT (p->infd) < 0) |
| 5731 | error ("Process %s is not active", |
| 5732 | SDATA (p->name)); |
| 5733 | |
| 5734 | gid = emacs_get_tty_pgrp (p); |
| 5735 | |
| 5736 | if (gid == p->pid) |
| 5737 | return Qnil; |
| 5738 | return Qt; |
| 5739 | } |
| 5740 | \f |
| 5741 | /* send a signal number SIGNO to PROCESS. |
| 5742 | If CURRENT_GROUP is t, that means send to the process group |
| 5743 | that currently owns the terminal being used to communicate with PROCESS. |
| 5744 | This is used for various commands in shell mode. |
| 5745 | If CURRENT_GROUP is lambda, that means send to the process group |
| 5746 | that currently owns the terminal, but only if it is NOT the shell itself. |
| 5747 | |
| 5748 | If NOMSG is zero, insert signal-announcements into process's buffers |
| 5749 | right away. |
| 5750 | |
| 5751 | If we can, we try to signal PROCESS by sending control characters |
| 5752 | down the pty. This allows us to signal inferiors who have changed |
| 5753 | their uid, for which killpg would return an EPERM error. */ |
| 5754 | |
| 5755 | static void |
| 5756 | process_send_signal (process, signo, current_group, nomsg) |
| 5757 | Lisp_Object process; |
| 5758 | int signo; |
| 5759 | Lisp_Object current_group; |
| 5760 | int nomsg; |
| 5761 | { |
| 5762 | Lisp_Object proc; |
| 5763 | register struct Lisp_Process *p; |
| 5764 | int gid; |
| 5765 | int no_pgrp = 0; |
| 5766 | |
| 5767 | proc = get_process (process); |
| 5768 | p = XPROCESS (proc); |
| 5769 | |
| 5770 | if (!EQ (p->childp, Qt)) |
| 5771 | error ("Process %s is not a subprocess", |
| 5772 | SDATA (p->name)); |
| 5773 | if (XINT (p->infd) < 0) |
| 5774 | error ("Process %s is not active", |
| 5775 | SDATA (p->name)); |
| 5776 | |
| 5777 | if (NILP (p->pty_flag)) |
| 5778 | current_group = Qnil; |
| 5779 | |
| 5780 | /* If we are using pgrps, get a pgrp number and make it negative. */ |
| 5781 | if (NILP (current_group)) |
| 5782 | /* Send the signal to the shell's process group. */ |
| 5783 | gid = p->pid; |
| 5784 | else |
| 5785 | { |
| 5786 | #ifdef SIGNALS_VIA_CHARACTERS |
| 5787 | /* If possible, send signals to the entire pgrp |
| 5788 | by sending an input character to it. */ |
| 5789 | |
| 5790 | /* TERMIOS is the latest and bestest, and seems most likely to |
| 5791 | work. If the system has it, use it. */ |
| 5792 | #ifdef HAVE_TERMIOS |
| 5793 | struct termios t; |
| 5794 | cc_t *sig_char = NULL; |
| 5795 | |
| 5796 | tcgetattr (XINT (p->infd), &t); |
| 5797 | |
| 5798 | switch (signo) |
| 5799 | { |
| 5800 | case SIGINT: |
| 5801 | sig_char = &t.c_cc[VINTR]; |
| 5802 | break; |
| 5803 | |
| 5804 | case SIGQUIT: |
| 5805 | sig_char = &t.c_cc[VQUIT]; |
| 5806 | break; |
| 5807 | |
| 5808 | case SIGTSTP: |
| 5809 | #if defined (VSWTCH) && !defined (PREFER_VSUSP) |
| 5810 | sig_char = &t.c_cc[VSWTCH]; |
| 5811 | #else |
| 5812 | sig_char = &t.c_cc[VSUSP]; |
| 5813 | #endif |
| 5814 | break; |
| 5815 | } |
| 5816 | |
| 5817 | if (sig_char && *sig_char != CDISABLE) |
| 5818 | { |
| 5819 | send_process (proc, sig_char, 1, Qnil); |
| 5820 | return; |
| 5821 | } |
| 5822 | /* If we can't send the signal with a character, |
| 5823 | fall through and send it another way. */ |
| 5824 | #else /* ! HAVE_TERMIOS */ |
| 5825 | |
| 5826 | /* On Berkeley descendants, the following IOCTL's retrieve the |
| 5827 | current control characters. */ |
| 5828 | #if defined (TIOCGLTC) && defined (TIOCGETC) |
| 5829 | |
| 5830 | struct tchars c; |
| 5831 | struct ltchars lc; |
| 5832 | |
| 5833 | switch (signo) |
| 5834 | { |
| 5835 | case SIGINT: |
| 5836 | ioctl (XINT (p->infd), TIOCGETC, &c); |
| 5837 | send_process (proc, &c.t_intrc, 1, Qnil); |
| 5838 | return; |
| 5839 | case SIGQUIT: |
| 5840 | ioctl (XINT (p->infd), TIOCGETC, &c); |
| 5841 | send_process (proc, &c.t_quitc, 1, Qnil); |
| 5842 | return; |
| 5843 | #ifdef SIGTSTP |
| 5844 | case SIGTSTP: |
| 5845 | ioctl (XINT (p->infd), TIOCGLTC, &lc); |
| 5846 | send_process (proc, &lc.t_suspc, 1, Qnil); |
| 5847 | return; |
| 5848 | #endif /* ! defined (SIGTSTP) */ |
| 5849 | } |
| 5850 | |
| 5851 | #else /* ! defined (TIOCGLTC) && defined (TIOCGETC) */ |
| 5852 | |
| 5853 | /* On SYSV descendants, the TCGETA ioctl retrieves the current control |
| 5854 | characters. */ |
| 5855 | #ifdef TCGETA |
| 5856 | struct termio t; |
| 5857 | switch (signo) |
| 5858 | { |
| 5859 | case SIGINT: |
| 5860 | ioctl (XINT (p->infd), TCGETA, &t); |
| 5861 | send_process (proc, &t.c_cc[VINTR], 1, Qnil); |
| 5862 | return; |
| 5863 | case SIGQUIT: |
| 5864 | ioctl (XINT (p->infd), TCGETA, &t); |
| 5865 | send_process (proc, &t.c_cc[VQUIT], 1, Qnil); |
| 5866 | return; |
| 5867 | #ifdef SIGTSTP |
| 5868 | case SIGTSTP: |
| 5869 | ioctl (XINT (p->infd), TCGETA, &t); |
| 5870 | send_process (proc, &t.c_cc[VSWTCH], 1, Qnil); |
| 5871 | return; |
| 5872 | #endif /* ! defined (SIGTSTP) */ |
| 5873 | } |
| 5874 | #else /* ! defined (TCGETA) */ |
| 5875 | Your configuration files are messed up. |
| 5876 | /* If your system configuration files define SIGNALS_VIA_CHARACTERS, |
| 5877 | you'd better be using one of the alternatives above! */ |
| 5878 | #endif /* ! defined (TCGETA) */ |
| 5879 | #endif /* ! defined (TIOCGLTC) && defined (TIOCGETC) */ |
| 5880 | /* In this case, the code above should alway returns. */ |
| 5881 | abort (); |
| 5882 | #endif /* ! defined HAVE_TERMIOS */ |
| 5883 | |
| 5884 | /* The code above may fall through if it can't |
| 5885 | handle the signal. */ |
| 5886 | #endif /* defined (SIGNALS_VIA_CHARACTERS) */ |
| 5887 | |
| 5888 | #ifdef TIOCGPGRP |
| 5889 | /* Get the current pgrp using the tty itself, if we have that. |
| 5890 | Otherwise, use the pty to get the pgrp. |
| 5891 | On pfa systems, saka@pfu.fujitsu.co.JP writes: |
| 5892 | "TIOCGPGRP symbol defined in sys/ioctl.h at E50. |
| 5893 | But, TIOCGPGRP does not work on E50 ;-P works fine on E60" |
| 5894 | His patch indicates that if TIOCGPGRP returns an error, then |
| 5895 | we should just assume that p->pid is also the process group id. */ |
| 5896 | |
| 5897 | gid = emacs_get_tty_pgrp (p); |
| 5898 | |
| 5899 | if (gid == -1) |
| 5900 | /* If we can't get the information, assume |
| 5901 | the shell owns the tty. */ |
| 5902 | gid = p->pid; |
| 5903 | |
| 5904 | /* It is not clear whether anything really can set GID to -1. |
| 5905 | Perhaps on some system one of those ioctls can or could do so. |
| 5906 | Or perhaps this is vestigial. */ |
| 5907 | if (gid == -1) |
| 5908 | no_pgrp = 1; |
| 5909 | #else /* ! defined (TIOCGPGRP ) */ |
| 5910 | /* Can't select pgrps on this system, so we know that |
| 5911 | the child itself heads the pgrp. */ |
| 5912 | gid = p->pid; |
| 5913 | #endif /* ! defined (TIOCGPGRP ) */ |
| 5914 | |
| 5915 | /* If current_group is lambda, and the shell owns the terminal, |
| 5916 | don't send any signal. */ |
| 5917 | if (EQ (current_group, Qlambda) && gid == p->pid) |
| 5918 | return; |
| 5919 | } |
| 5920 | |
| 5921 | switch (signo) |
| 5922 | { |
| 5923 | #ifdef SIGCONT |
| 5924 | case SIGCONT: |
| 5925 | p->raw_status_new = 0; |
| 5926 | p->status = Qrun; |
| 5927 | XSETINT (p->tick, ++process_tick); |
| 5928 | if (!nomsg) |
| 5929 | status_notify (NULL); |
| 5930 | break; |
| 5931 | #endif /* ! defined (SIGCONT) */ |
| 5932 | case SIGINT: |
| 5933 | #ifdef VMS |
| 5934 | send_process (proc, "\003", 1, Qnil); /* ^C */ |
| 5935 | goto whoosh; |
| 5936 | #endif |
| 5937 | case SIGQUIT: |
| 5938 | #ifdef VMS |
| 5939 | send_process (proc, "\031", 1, Qnil); /* ^Y */ |
| 5940 | goto whoosh; |
| 5941 | #endif |
| 5942 | case SIGKILL: |
| 5943 | #ifdef VMS |
| 5944 | sys$forcex (&(p->pid), 0, 1); |
| 5945 | whoosh: |
| 5946 | #endif |
| 5947 | flush_pending_output (XINT (p->infd)); |
| 5948 | break; |
| 5949 | } |
| 5950 | |
| 5951 | /* If we don't have process groups, send the signal to the immediate |
| 5952 | subprocess. That isn't really right, but it's better than any |
| 5953 | obvious alternative. */ |
| 5954 | if (no_pgrp) |
| 5955 | { |
| 5956 | kill (p->pid, signo); |
| 5957 | return; |
| 5958 | } |
| 5959 | |
| 5960 | /* gid may be a pid, or minus a pgrp's number */ |
| 5961 | #ifdef TIOCSIGSEND |
| 5962 | if (!NILP (current_group)) |
| 5963 | { |
| 5964 | if (ioctl (XINT (p->infd), TIOCSIGSEND, signo) == -1) |
| 5965 | EMACS_KILLPG (gid, signo); |
| 5966 | } |
| 5967 | else |
| 5968 | { |
| 5969 | gid = - p->pid; |
| 5970 | kill (gid, signo); |
| 5971 | } |
| 5972 | #else /* ! defined (TIOCSIGSEND) */ |
| 5973 | EMACS_KILLPG (gid, signo); |
| 5974 | #endif /* ! defined (TIOCSIGSEND) */ |
| 5975 | } |
| 5976 | |
| 5977 | DEFUN ("interrupt-process", Finterrupt_process, Sinterrupt_process, 0, 2, 0, |
| 5978 | doc: /* Interrupt process PROCESS. |
| 5979 | PROCESS may be a process, a buffer, or the name of a process or buffer. |
| 5980 | No arg or nil means current buffer's process. |
| 5981 | Second arg CURRENT-GROUP non-nil means send signal to |
| 5982 | the current process-group of the process's controlling terminal |
| 5983 | rather than to the process's own process group. |
| 5984 | If the process is a shell, this means interrupt current subjob |
| 5985 | rather than the shell. |
| 5986 | |
| 5987 | If CURRENT-GROUP is `lambda', and if the shell owns the terminal, |
| 5988 | don't send the signal. */) |
| 5989 | (process, current_group) |
| 5990 | Lisp_Object process, current_group; |
| 5991 | { |
| 5992 | process_send_signal (process, SIGINT, current_group, 0); |
| 5993 | return process; |
| 5994 | } |
| 5995 | |
| 5996 | DEFUN ("kill-process", Fkill_process, Skill_process, 0, 2, 0, |
| 5997 | doc: /* Kill process PROCESS. May be process or name of one. |
| 5998 | See function `interrupt-process' for more details on usage. */) |
| 5999 | (process, current_group) |
| 6000 | Lisp_Object process, current_group; |
| 6001 | { |
| 6002 | process_send_signal (process, SIGKILL, current_group, 0); |
| 6003 | return process; |
| 6004 | } |
| 6005 | |
| 6006 | DEFUN ("quit-process", Fquit_process, Squit_process, 0, 2, 0, |
| 6007 | doc: /* Send QUIT signal to process PROCESS. May be process or name of one. |
| 6008 | See function `interrupt-process' for more details on usage. */) |
| 6009 | (process, current_group) |
| 6010 | Lisp_Object process, current_group; |
| 6011 | { |
| 6012 | process_send_signal (process, SIGQUIT, current_group, 0); |
| 6013 | return process; |
| 6014 | } |
| 6015 | |
| 6016 | DEFUN ("stop-process", Fstop_process, Sstop_process, 0, 2, 0, |
| 6017 | doc: /* Stop process PROCESS. May be process or name of one. |
| 6018 | See function `interrupt-process' for more details on usage. |
| 6019 | If PROCESS is a network process, inhibit handling of incoming traffic. */) |
| 6020 | (process, current_group) |
| 6021 | Lisp_Object process, current_group; |
| 6022 | { |
| 6023 | #ifdef HAVE_SOCKETS |
| 6024 | if (PROCESSP (process) && NETCONN_P (process)) |
| 6025 | { |
| 6026 | struct Lisp_Process *p; |
| 6027 | |
| 6028 | p = XPROCESS (process); |
| 6029 | if (NILP (p->command) |
| 6030 | && XINT (p->infd) >= 0) |
| 6031 | { |
| 6032 | FD_CLR (XINT (p->infd), &input_wait_mask); |
| 6033 | FD_CLR (XINT (p->infd), &non_keyboard_wait_mask); |
| 6034 | } |
| 6035 | p->command = Qt; |
| 6036 | return process; |
| 6037 | } |
| 6038 | #endif |
| 6039 | #ifndef SIGTSTP |
| 6040 | error ("No SIGTSTP support"); |
| 6041 | #else |
| 6042 | process_send_signal (process, SIGTSTP, current_group, 0); |
| 6043 | #endif |
| 6044 | return process; |
| 6045 | } |
| 6046 | |
| 6047 | DEFUN ("continue-process", Fcontinue_process, Scontinue_process, 0, 2, 0, |
| 6048 | doc: /* Continue process PROCESS. May be process or name of one. |
| 6049 | See function `interrupt-process' for more details on usage. |
| 6050 | If PROCESS is a network process, resume handling of incoming traffic. */) |
| 6051 | (process, current_group) |
| 6052 | Lisp_Object process, current_group; |
| 6053 | { |
| 6054 | #ifdef HAVE_SOCKETS |
| 6055 | if (PROCESSP (process) && NETCONN_P (process)) |
| 6056 | { |
| 6057 | struct Lisp_Process *p; |
| 6058 | |
| 6059 | p = XPROCESS (process); |
| 6060 | if (EQ (p->command, Qt) |
| 6061 | && XINT (p->infd) >= 0 |
| 6062 | && (!EQ (p->filter, Qt) || EQ (p->status, Qlisten))) |
| 6063 | { |
| 6064 | FD_SET (XINT (p->infd), &input_wait_mask); |
| 6065 | FD_SET (XINT (p->infd), &non_keyboard_wait_mask); |
| 6066 | } |
| 6067 | p->command = Qnil; |
| 6068 | return process; |
| 6069 | } |
| 6070 | #endif |
| 6071 | #ifdef SIGCONT |
| 6072 | process_send_signal (process, SIGCONT, current_group, 0); |
| 6073 | #else |
| 6074 | error ("No SIGCONT support"); |
| 6075 | #endif |
| 6076 | return process; |
| 6077 | } |
| 6078 | |
| 6079 | DEFUN ("signal-process", Fsignal_process, Ssignal_process, |
| 6080 | 2, 2, "sProcess (name or number): \nnSignal code: ", |
| 6081 | doc: /* Send PROCESS the signal with code SIGCODE. |
| 6082 | PROCESS may also be an integer specifying the process id of the |
| 6083 | process to signal; in this case, the process need not be a child of |
| 6084 | this Emacs. |
| 6085 | SIGCODE may be an integer, or a symbol whose name is a signal name. */) |
| 6086 | (process, sigcode) |
| 6087 | Lisp_Object process, sigcode; |
| 6088 | { |
| 6089 | pid_t pid; |
| 6090 | |
| 6091 | if (INTEGERP (process)) |
| 6092 | { |
| 6093 | pid = XINT (process); |
| 6094 | goto got_it; |
| 6095 | } |
| 6096 | |
| 6097 | if (FLOATP (process)) |
| 6098 | { |
| 6099 | pid = (pid_t) XFLOAT (process); |
| 6100 | goto got_it; |
| 6101 | } |
| 6102 | |
| 6103 | if (STRINGP (process)) |
| 6104 | { |
| 6105 | Lisp_Object tem; |
| 6106 | if (tem = Fget_process (process), NILP (tem)) |
| 6107 | { |
| 6108 | pid = XINT (Fstring_to_number (process, make_number (10))); |
| 6109 | if (pid > 0) |
| 6110 | goto got_it; |
| 6111 | } |
| 6112 | process = tem; |
| 6113 | } |
| 6114 | else |
| 6115 | process = get_process (process); |
| 6116 | |
| 6117 | if (NILP (process)) |
| 6118 | return process; |
| 6119 | |
| 6120 | CHECK_PROCESS (process); |
| 6121 | pid = XPROCESS (process)->pid; |
| 6122 | if (pid <= 0) |
| 6123 | error ("Cannot signal process %s", SDATA (XPROCESS (process)->name)); |
| 6124 | |
| 6125 | got_it: |
| 6126 | |
| 6127 | #define handle_signal(NAME, VALUE) \ |
| 6128 | else if (!strcmp (name, NAME)) \ |
| 6129 | XSETINT (sigcode, VALUE) |
| 6130 | |
| 6131 | if (INTEGERP (sigcode)) |
| 6132 | ; |
| 6133 | else |
| 6134 | { |
| 6135 | unsigned char *name; |
| 6136 | |
| 6137 | CHECK_SYMBOL (sigcode); |
| 6138 | name = SDATA (SYMBOL_NAME (sigcode)); |
| 6139 | |
| 6140 | if (!strncmp(name, "SIG", 3)) |
| 6141 | name += 3; |
| 6142 | |
| 6143 | if (0) |
| 6144 | ; |
| 6145 | #ifdef SIGHUP |
| 6146 | handle_signal ("HUP", SIGHUP); |
| 6147 | #endif |
| 6148 | #ifdef SIGINT |
| 6149 | handle_signal ("INT", SIGINT); |
| 6150 | #endif |
| 6151 | #ifdef SIGQUIT |
| 6152 | handle_signal ("QUIT", SIGQUIT); |
| 6153 | #endif |
| 6154 | #ifdef SIGILL |
| 6155 | handle_signal ("ILL", SIGILL); |
| 6156 | #endif |
| 6157 | #ifdef SIGABRT |
| 6158 | handle_signal ("ABRT", SIGABRT); |
| 6159 | #endif |
| 6160 | #ifdef SIGEMT |
| 6161 | handle_signal ("EMT", SIGEMT); |
| 6162 | #endif |
| 6163 | #ifdef SIGKILL |
| 6164 | handle_signal ("KILL", SIGKILL); |
| 6165 | #endif |
| 6166 | #ifdef SIGFPE |
| 6167 | handle_signal ("FPE", SIGFPE); |
| 6168 | #endif |
| 6169 | #ifdef SIGBUS |
| 6170 | handle_signal ("BUS", SIGBUS); |
| 6171 | #endif |
| 6172 | #ifdef SIGSEGV |
| 6173 | handle_signal ("SEGV", SIGSEGV); |
| 6174 | #endif |
| 6175 | #ifdef SIGSYS |
| 6176 | handle_signal ("SYS", SIGSYS); |
| 6177 | #endif |
| 6178 | #ifdef SIGPIPE |
| 6179 | handle_signal ("PIPE", SIGPIPE); |
| 6180 | #endif |
| 6181 | #ifdef SIGALRM |
| 6182 | handle_signal ("ALRM", SIGALRM); |
| 6183 | #endif |
| 6184 | #ifdef SIGTERM |
| 6185 | handle_signal ("TERM", SIGTERM); |
| 6186 | #endif |
| 6187 | #ifdef SIGURG |
| 6188 | handle_signal ("URG", SIGURG); |
| 6189 | #endif |
| 6190 | #ifdef SIGSTOP |
| 6191 | handle_signal ("STOP", SIGSTOP); |
| 6192 | #endif |
| 6193 | #ifdef SIGTSTP |
| 6194 | handle_signal ("TSTP", SIGTSTP); |
| 6195 | #endif |
| 6196 | #ifdef SIGCONT |
| 6197 | handle_signal ("CONT", SIGCONT); |
| 6198 | #endif |
| 6199 | #ifdef SIGCHLD |
| 6200 | handle_signal ("CHLD", SIGCHLD); |
| 6201 | #endif |
| 6202 | #ifdef SIGTTIN |
| 6203 | handle_signal ("TTIN", SIGTTIN); |
| 6204 | #endif |
| 6205 | #ifdef SIGTTOU |
| 6206 | handle_signal ("TTOU", SIGTTOU); |
| 6207 | #endif |
| 6208 | #ifdef SIGIO |
| 6209 | handle_signal ("IO", SIGIO); |
| 6210 | #endif |
| 6211 | #ifdef SIGXCPU |
| 6212 | handle_signal ("XCPU", SIGXCPU); |
| 6213 | #endif |
| 6214 | #ifdef SIGXFSZ |
| 6215 | handle_signal ("XFSZ", SIGXFSZ); |
| 6216 | #endif |
| 6217 | #ifdef SIGVTALRM |
| 6218 | handle_signal ("VTALRM", SIGVTALRM); |
| 6219 | #endif |
| 6220 | #ifdef SIGPROF |
| 6221 | handle_signal ("PROF", SIGPROF); |
| 6222 | #endif |
| 6223 | #ifdef SIGWINCH |
| 6224 | handle_signal ("WINCH", SIGWINCH); |
| 6225 | #endif |
| 6226 | #ifdef SIGINFO |
| 6227 | handle_signal ("INFO", SIGINFO); |
| 6228 | #endif |
| 6229 | #ifdef SIGUSR1 |
| 6230 | handle_signal ("USR1", SIGUSR1); |
| 6231 | #endif |
| 6232 | #ifdef SIGUSR2 |
| 6233 | handle_signal ("USR2", SIGUSR2); |
| 6234 | #endif |
| 6235 | else |
| 6236 | error ("Undefined signal name %s", name); |
| 6237 | } |
| 6238 | |
| 6239 | #undef handle_signal |
| 6240 | |
| 6241 | return make_number (kill (pid, XINT (sigcode))); |
| 6242 | } |
| 6243 | |
| 6244 | DEFUN ("process-send-eof", Fprocess_send_eof, Sprocess_send_eof, 0, 1, 0, |
| 6245 | doc: /* Make PROCESS see end-of-file in its input. |
| 6246 | EOF comes after any text already sent to it. |
| 6247 | PROCESS may be a process, a buffer, the name of a process or buffer, or |
| 6248 | nil, indicating the current buffer's process. |
| 6249 | If PROCESS is a network connection, or is a process communicating |
| 6250 | through a pipe (as opposed to a pty), then you cannot send any more |
| 6251 | text to PROCESS after you call this function. */) |
| 6252 | (process) |
| 6253 | Lisp_Object process; |
| 6254 | { |
| 6255 | Lisp_Object proc; |
| 6256 | struct coding_system *coding; |
| 6257 | |
| 6258 | if (DATAGRAM_CONN_P (process)) |
| 6259 | return process; |
| 6260 | |
| 6261 | proc = get_process (process); |
| 6262 | coding = proc_encode_coding_system[XINT (XPROCESS (proc)->outfd)]; |
| 6263 | |
| 6264 | /* Make sure the process is really alive. */ |
| 6265 | if (XPROCESS (proc)->raw_status_new) |
| 6266 | update_status (XPROCESS (proc)); |
| 6267 | if (! EQ (XPROCESS (proc)->status, Qrun)) |
| 6268 | error ("Process %s not running", SDATA (XPROCESS (proc)->name)); |
| 6269 | |
| 6270 | if (CODING_REQUIRE_FLUSHING (coding)) |
| 6271 | { |
| 6272 | coding->mode |= CODING_MODE_LAST_BLOCK; |
| 6273 | send_process (proc, "", 0, Qnil); |
| 6274 | } |
| 6275 | |
| 6276 | #ifdef VMS |
| 6277 | send_process (proc, "\032", 1, Qnil); /* ^z */ |
| 6278 | #else |
| 6279 | if (!NILP (XPROCESS (proc)->pty_flag)) |
| 6280 | send_process (proc, "\004", 1, Qnil); |
| 6281 | else |
| 6282 | { |
| 6283 | int old_outfd, new_outfd; |
| 6284 | |
| 6285 | #ifdef HAVE_SHUTDOWN |
| 6286 | /* If this is a network connection, or socketpair is used |
| 6287 | for communication with the subprocess, call shutdown to cause EOF. |
| 6288 | (In some old system, shutdown to socketpair doesn't work. |
| 6289 | Then we just can't win.) */ |
| 6290 | if (XPROCESS (proc)->pid == 0 |
| 6291 | || XINT (XPROCESS (proc)->outfd) == XINT (XPROCESS (proc)->infd)) |
| 6292 | shutdown (XINT (XPROCESS (proc)->outfd), 1); |
| 6293 | /* In case of socketpair, outfd == infd, so don't close it. */ |
| 6294 | if (XINT (XPROCESS (proc)->outfd) != XINT (XPROCESS (proc)->infd)) |
| 6295 | emacs_close (XINT (XPROCESS (proc)->outfd)); |
| 6296 | #else /* not HAVE_SHUTDOWN */ |
| 6297 | emacs_close (XINT (XPROCESS (proc)->outfd)); |
| 6298 | #endif /* not HAVE_SHUTDOWN */ |
| 6299 | new_outfd = emacs_open (NULL_DEVICE, O_WRONLY, 0); |
| 6300 | if (new_outfd < 0) |
| 6301 | abort (); |
| 6302 | old_outfd = XINT (XPROCESS (proc)->outfd); |
| 6303 | |
| 6304 | if (!proc_encode_coding_system[new_outfd]) |
| 6305 | proc_encode_coding_system[new_outfd] |
| 6306 | = (struct coding_system *) xmalloc (sizeof (struct coding_system)); |
| 6307 | bcopy (proc_encode_coding_system[old_outfd], |
| 6308 | proc_encode_coding_system[new_outfd], |
| 6309 | sizeof (struct coding_system)); |
| 6310 | bzero (proc_encode_coding_system[old_outfd], |
| 6311 | sizeof (struct coding_system)); |
| 6312 | |
| 6313 | XSETINT (XPROCESS (proc)->outfd, new_outfd); |
| 6314 | } |
| 6315 | #endif /* VMS */ |
| 6316 | return process; |
| 6317 | } |
| 6318 | |
| 6319 | /* Kill all processes associated with `buffer'. |
| 6320 | If `buffer' is nil, kill all processes */ |
| 6321 | |
| 6322 | void |
| 6323 | kill_buffer_processes (buffer) |
| 6324 | Lisp_Object buffer; |
| 6325 | { |
| 6326 | Lisp_Object tail, proc; |
| 6327 | |
| 6328 | for (tail = Vprocess_alist; GC_CONSP (tail); tail = XCDR (tail)) |
| 6329 | { |
| 6330 | proc = XCDR (XCAR (tail)); |
| 6331 | if (GC_PROCESSP (proc) |
| 6332 | && (NILP (buffer) || EQ (XPROCESS (proc)->buffer, buffer))) |
| 6333 | { |
| 6334 | if (NETCONN_P (proc)) |
| 6335 | Fdelete_process (proc); |
| 6336 | else if (XINT (XPROCESS (proc)->infd) >= 0) |
| 6337 | process_send_signal (proc, SIGHUP, Qnil, 1); |
| 6338 | } |
| 6339 | } |
| 6340 | } |
| 6341 | \f |
| 6342 | /* On receipt of a signal that a child status has changed, loop asking |
| 6343 | about children with changed statuses until the system says there |
| 6344 | are no more. |
| 6345 | |
| 6346 | All we do is change the status; we do not run sentinels or print |
| 6347 | notifications. That is saved for the next time keyboard input is |
| 6348 | done, in order to avoid timing errors. |
| 6349 | |
| 6350 | ** WARNING: this can be called during garbage collection. |
| 6351 | Therefore, it must not be fooled by the presence of mark bits in |
| 6352 | Lisp objects. |
| 6353 | |
| 6354 | ** USG WARNING: Although it is not obvious from the documentation |
| 6355 | in signal(2), on a USG system the SIGCLD handler MUST NOT call |
| 6356 | signal() before executing at least one wait(), otherwise the |
| 6357 | handler will be called again, resulting in an infinite loop. The |
| 6358 | relevant portion of the documentation reads "SIGCLD signals will be |
| 6359 | queued and the signal-catching function will be continually |
| 6360 | reentered until the queue is empty". Invoking signal() causes the |
| 6361 | kernel to reexamine the SIGCLD queue. Fred Fish, UniSoft Systems |
| 6362 | Inc. |
| 6363 | |
| 6364 | ** Malloc WARNING: This should never call malloc either directly or |
| 6365 | indirectly; if it does, that is a bug */ |
| 6366 | |
| 6367 | #ifdef SIGCHLD |
| 6368 | SIGTYPE |
| 6369 | sigchld_handler (signo) |
| 6370 | int signo; |
| 6371 | { |
| 6372 | int old_errno = errno; |
| 6373 | Lisp_Object proc; |
| 6374 | register struct Lisp_Process *p; |
| 6375 | extern EMACS_TIME *input_available_clear_time; |
| 6376 | |
| 6377 | SIGNAL_THREAD_CHECK (signo); |
| 6378 | |
| 6379 | #ifdef BSD4_1 |
| 6380 | extern int sigheld; |
| 6381 | sigheld |= sigbit (SIGCHLD); |
| 6382 | #endif |
| 6383 | |
| 6384 | while (1) |
| 6385 | { |
| 6386 | register int pid; |
| 6387 | WAITTYPE w; |
| 6388 | Lisp_Object tail; |
| 6389 | |
| 6390 | #ifdef WNOHANG |
| 6391 | #ifndef WUNTRACED |
| 6392 | #define WUNTRACED 0 |
| 6393 | #endif /* no WUNTRACED */ |
| 6394 | /* Keep trying to get a status until we get a definitive result. */ |
| 6395 | do |
| 6396 | { |
| 6397 | errno = 0; |
| 6398 | pid = wait3 (&w, WNOHANG | WUNTRACED, 0); |
| 6399 | } |
| 6400 | while (pid < 0 && errno == EINTR); |
| 6401 | |
| 6402 | if (pid <= 0) |
| 6403 | { |
| 6404 | /* PID == 0 means no processes found, PID == -1 means a real |
| 6405 | failure. We have done all our job, so return. */ |
| 6406 | |
| 6407 | /* USG systems forget handlers when they are used; |
| 6408 | must reestablish each time */ |
| 6409 | #if defined (USG) && !defined (POSIX_SIGNALS) |
| 6410 | signal (signo, sigchld_handler); /* WARNING - must come after wait3() */ |
| 6411 | #endif |
| 6412 | #ifdef BSD4_1 |
| 6413 | sigheld &= ~sigbit (SIGCHLD); |
| 6414 | sigrelse (SIGCHLD); |
| 6415 | #endif |
| 6416 | errno = old_errno; |
| 6417 | return; |
| 6418 | } |
| 6419 | #else |
| 6420 | pid = wait (&w); |
| 6421 | #endif /* no WNOHANG */ |
| 6422 | |
| 6423 | /* Find the process that signaled us, and record its status. */ |
| 6424 | |
| 6425 | /* The process can have been deleted by Fdelete_process. */ |
| 6426 | tail = Fmember (make_fixnum_or_float (pid), deleted_pid_list); |
| 6427 | if (!NILP (tail)) |
| 6428 | { |
| 6429 | Fsetcar (tail, Qnil); |
| 6430 | goto sigchld_end_of_loop; |
| 6431 | } |
| 6432 | |
| 6433 | /* Otherwise, if it is asynchronous, it is in Vprocess_alist. */ |
| 6434 | p = 0; |
| 6435 | for (tail = Vprocess_alist; GC_CONSP (tail); tail = XCDR (tail)) |
| 6436 | { |
| 6437 | proc = XCDR (XCAR (tail)); |
| 6438 | p = XPROCESS (proc); |
| 6439 | if (GC_EQ (p->childp, Qt) && p->pid == pid) |
| 6440 | break; |
| 6441 | p = 0; |
| 6442 | } |
| 6443 | |
| 6444 | /* Look for an asynchronous process whose pid hasn't been filled |
| 6445 | in yet. */ |
| 6446 | if (p == 0) |
| 6447 | for (tail = Vprocess_alist; GC_CONSP (tail); tail = XCDR (tail)) |
| 6448 | { |
| 6449 | proc = XCDR (XCAR (tail)); |
| 6450 | p = XPROCESS (proc); |
| 6451 | if (p->pid == -1) |
| 6452 | break; |
| 6453 | p = 0; |
| 6454 | } |
| 6455 | |
| 6456 | /* Change the status of the process that was found. */ |
| 6457 | if (p != 0) |
| 6458 | { |
| 6459 | union { int i; WAITTYPE wt; } u; |
| 6460 | int clear_desc_flag = 0; |
| 6461 | |
| 6462 | XSETINT (p->tick, ++process_tick); |
| 6463 | u.wt = w; |
| 6464 | p->raw_status = u.i; |
| 6465 | p->raw_status_new = 1; |
| 6466 | |
| 6467 | /* If process has terminated, stop waiting for its output. */ |
| 6468 | if ((WIFSIGNALED (w) || WIFEXITED (w)) |
| 6469 | && XINT (p->infd) >= 0) |
| 6470 | clear_desc_flag = 1; |
| 6471 | |
| 6472 | /* We use clear_desc_flag to avoid a compiler bug in Microsoft C. */ |
| 6473 | if (clear_desc_flag) |
| 6474 | { |
| 6475 | FD_CLR (XINT (p->infd), &input_wait_mask); |
| 6476 | FD_CLR (XINT (p->infd), &non_keyboard_wait_mask); |
| 6477 | } |
| 6478 | |
| 6479 | /* Tell wait_reading_process_output that it needs to wake up and |
| 6480 | look around. */ |
| 6481 | if (input_available_clear_time) |
| 6482 | EMACS_SET_SECS_USECS (*input_available_clear_time, 0, 0); |
| 6483 | } |
| 6484 | |
| 6485 | /* There was no asynchronous process found for that pid: we have |
| 6486 | a synchronous process. */ |
| 6487 | else |
| 6488 | { |
| 6489 | synch_process_alive = 0; |
| 6490 | |
| 6491 | /* Report the status of the synchronous process. */ |
| 6492 | if (WIFEXITED (w)) |
| 6493 | synch_process_retcode = WRETCODE (w); |
| 6494 | else if (WIFSIGNALED (w)) |
| 6495 | synch_process_termsig = WTERMSIG (w); |
| 6496 | |
| 6497 | /* Tell wait_reading_process_output that it needs to wake up and |
| 6498 | look around. */ |
| 6499 | if (input_available_clear_time) |
| 6500 | EMACS_SET_SECS_USECS (*input_available_clear_time, 0, 0); |
| 6501 | } |
| 6502 | |
| 6503 | sigchld_end_of_loop: |
| 6504 | ; |
| 6505 | |
| 6506 | /* On some systems, we must return right away. |
| 6507 | If any more processes want to signal us, we will |
| 6508 | get another signal. |
| 6509 | Otherwise (on systems that have WNOHANG), loop around |
| 6510 | to use up all the processes that have something to tell us. */ |
| 6511 | #if (defined WINDOWSNT \ |
| 6512 | || (defined USG && !defined GNU_LINUX \ |
| 6513 | && !(defined HPUX && defined WNOHANG))) |
| 6514 | #if defined (USG) && ! defined (POSIX_SIGNALS) |
| 6515 | signal (signo, sigchld_handler); |
| 6516 | #endif |
| 6517 | errno = old_errno; |
| 6518 | return; |
| 6519 | #endif /* USG, but not HPUX with WNOHANG */ |
| 6520 | } |
| 6521 | } |
| 6522 | #endif /* SIGCHLD */ |
| 6523 | \f |
| 6524 | |
| 6525 | static Lisp_Object |
| 6526 | exec_sentinel_unwind (data) |
| 6527 | Lisp_Object data; |
| 6528 | { |
| 6529 | XPROCESS (XCAR (data))->sentinel = XCDR (data); |
| 6530 | return Qnil; |
| 6531 | } |
| 6532 | |
| 6533 | static Lisp_Object |
| 6534 | exec_sentinel_error_handler (error) |
| 6535 | Lisp_Object error; |
| 6536 | { |
| 6537 | cmd_error_internal (error, "error in process sentinel: "); |
| 6538 | Vinhibit_quit = Qt; |
| 6539 | update_echo_area (); |
| 6540 | Fsleep_for (make_number (2), Qnil); |
| 6541 | return Qt; |
| 6542 | } |
| 6543 | |
| 6544 | static void |
| 6545 | exec_sentinel (proc, reason) |
| 6546 | Lisp_Object proc, reason; |
| 6547 | { |
| 6548 | Lisp_Object sentinel, obuffer, odeactivate, okeymap; |
| 6549 | register struct Lisp_Process *p = XPROCESS (proc); |
| 6550 | int count = SPECPDL_INDEX (); |
| 6551 | int outer_running_asynch_code = running_asynch_code; |
| 6552 | int waiting = waiting_for_user_input_p; |
| 6553 | |
| 6554 | /* No need to gcpro these, because all we do with them later |
| 6555 | is test them for EQness, and none of them should be a string. */ |
| 6556 | odeactivate = Vdeactivate_mark; |
| 6557 | XSETBUFFER (obuffer, current_buffer); |
| 6558 | okeymap = current_buffer->keymap; |
| 6559 | |
| 6560 | sentinel = p->sentinel; |
| 6561 | if (NILP (sentinel)) |
| 6562 | return; |
| 6563 | |
| 6564 | /* Zilch the sentinel while it's running, to avoid recursive invocations; |
| 6565 | assure that it gets restored no matter how the sentinel exits. */ |
| 6566 | p->sentinel = Qnil; |
| 6567 | record_unwind_protect (exec_sentinel_unwind, Fcons (proc, sentinel)); |
| 6568 | /* Inhibit quit so that random quits don't screw up a running filter. */ |
| 6569 | specbind (Qinhibit_quit, Qt); |
| 6570 | specbind (Qlast_nonmenu_event, Qt); |
| 6571 | |
| 6572 | /* In case we get recursively called, |
| 6573 | and we already saved the match data nonrecursively, |
| 6574 | save the same match data in safely recursive fashion. */ |
| 6575 | if (outer_running_asynch_code) |
| 6576 | { |
| 6577 | Lisp_Object tem; |
| 6578 | tem = Fmatch_data (Qnil, Qnil, Qnil); |
| 6579 | restore_search_regs (); |
| 6580 | record_unwind_save_match_data (); |
| 6581 | Fset_match_data (tem, Qt); |
| 6582 | } |
| 6583 | |
| 6584 | /* For speed, if a search happens within this code, |
| 6585 | save the match data in a special nonrecursive fashion. */ |
| 6586 | running_asynch_code = 1; |
| 6587 | |
| 6588 | internal_condition_case_1 (read_process_output_call, |
| 6589 | Fcons (sentinel, |
| 6590 | Fcons (proc, Fcons (reason, Qnil))), |
| 6591 | !NILP (Vdebug_on_error) ? Qnil : Qerror, |
| 6592 | exec_sentinel_error_handler); |
| 6593 | |
| 6594 | /* If we saved the match data nonrecursively, restore it now. */ |
| 6595 | restore_search_regs (); |
| 6596 | running_asynch_code = outer_running_asynch_code; |
| 6597 | |
| 6598 | Vdeactivate_mark = odeactivate; |
| 6599 | |
| 6600 | /* Restore waiting_for_user_input_p as it was |
| 6601 | when we were called, in case the filter clobbered it. */ |
| 6602 | waiting_for_user_input_p = waiting; |
| 6603 | |
| 6604 | #if 0 |
| 6605 | if (! EQ (Fcurrent_buffer (), obuffer) |
| 6606 | || ! EQ (current_buffer->keymap, okeymap)) |
| 6607 | #endif |
| 6608 | /* But do it only if the caller is actually going to read events. |
| 6609 | Otherwise there's no need to make him wake up, and it could |
| 6610 | cause trouble (for example it would make sit_for return). */ |
| 6611 | if (waiting_for_user_input_p == -1) |
| 6612 | record_asynch_buffer_change (); |
| 6613 | |
| 6614 | unbind_to (count, Qnil); |
| 6615 | } |
| 6616 | |
| 6617 | /* Report all recent events of a change in process status |
| 6618 | (either run the sentinel or output a message). |
| 6619 | This is usually done while Emacs is waiting for keyboard input |
| 6620 | but can be done at other times. */ |
| 6621 | |
| 6622 | static void |
| 6623 | status_notify (deleting_process) |
| 6624 | struct Lisp_Process *deleting_process; |
| 6625 | { |
| 6626 | register Lisp_Object proc, buffer; |
| 6627 | Lisp_Object tail, msg; |
| 6628 | struct gcpro gcpro1, gcpro2; |
| 6629 | |
| 6630 | tail = Qnil; |
| 6631 | msg = Qnil; |
| 6632 | /* We need to gcpro tail; if read_process_output calls a filter |
| 6633 | which deletes a process and removes the cons to which tail points |
| 6634 | from Vprocess_alist, and then causes a GC, tail is an unprotected |
| 6635 | reference. */ |
| 6636 | GCPRO2 (tail, msg); |
| 6637 | |
| 6638 | /* Set this now, so that if new processes are created by sentinels |
| 6639 | that we run, we get called again to handle their status changes. */ |
| 6640 | update_tick = process_tick; |
| 6641 | |
| 6642 | for (tail = Vprocess_alist; !NILP (tail); tail = Fcdr (tail)) |
| 6643 | { |
| 6644 | Lisp_Object symbol; |
| 6645 | register struct Lisp_Process *p; |
| 6646 | |
| 6647 | proc = Fcdr (Fcar (tail)); |
| 6648 | p = XPROCESS (proc); |
| 6649 | |
| 6650 | if (XINT (p->tick) != XINT (p->update_tick)) |
| 6651 | { |
| 6652 | XSETINT (p->update_tick, XINT (p->tick)); |
| 6653 | |
| 6654 | /* If process is still active, read any output that remains. */ |
| 6655 | while (! EQ (p->filter, Qt) |
| 6656 | && ! EQ (p->status, Qconnect) |
| 6657 | && ! EQ (p->status, Qlisten) |
| 6658 | && ! EQ (p->command, Qt) /* Network process not stopped. */ |
| 6659 | && XINT (p->infd) >= 0 |
| 6660 | && p != deleting_process |
| 6661 | && read_process_output (proc, XINT (p->infd)) > 0); |
| 6662 | |
| 6663 | buffer = p->buffer; |
| 6664 | |
| 6665 | /* Get the text to use for the message. */ |
| 6666 | if (p->raw_status_new) |
| 6667 | update_status (p); |
| 6668 | msg = status_message (p); |
| 6669 | |
| 6670 | /* If process is terminated, deactivate it or delete it. */ |
| 6671 | symbol = p->status; |
| 6672 | if (CONSP (p->status)) |
| 6673 | symbol = XCAR (p->status); |
| 6674 | |
| 6675 | if (EQ (symbol, Qsignal) || EQ (symbol, Qexit) |
| 6676 | || EQ (symbol, Qclosed)) |
| 6677 | { |
| 6678 | if (delete_exited_processes) |
| 6679 | remove_process (proc); |
| 6680 | else |
| 6681 | deactivate_process (proc); |
| 6682 | } |
| 6683 | |
| 6684 | /* The actions above may have further incremented p->tick. |
| 6685 | So set p->update_tick again |
| 6686 | so that an error in the sentinel will not cause |
| 6687 | this code to be run again. */ |
| 6688 | XSETINT (p->update_tick, XINT (p->tick)); |
| 6689 | /* Now output the message suitably. */ |
| 6690 | if (!NILP (p->sentinel)) |
| 6691 | exec_sentinel (proc, msg); |
| 6692 | /* Don't bother with a message in the buffer |
| 6693 | when a process becomes runnable. */ |
| 6694 | else if (!EQ (symbol, Qrun) && !NILP (buffer)) |
| 6695 | { |
| 6696 | Lisp_Object ro, tem; |
| 6697 | struct buffer *old = current_buffer; |
| 6698 | int opoint, opoint_byte; |
| 6699 | int before, before_byte; |
| 6700 | |
| 6701 | ro = XBUFFER (buffer)->read_only; |
| 6702 | |
| 6703 | /* Avoid error if buffer is deleted |
| 6704 | (probably that's why the process is dead, too) */ |
| 6705 | if (NILP (XBUFFER (buffer)->name)) |
| 6706 | continue; |
| 6707 | Fset_buffer (buffer); |
| 6708 | |
| 6709 | opoint = PT; |
| 6710 | opoint_byte = PT_BYTE; |
| 6711 | /* Insert new output into buffer |
| 6712 | at the current end-of-output marker, |
| 6713 | thus preserving logical ordering of input and output. */ |
| 6714 | if (XMARKER (p->mark)->buffer) |
| 6715 | Fgoto_char (p->mark); |
| 6716 | else |
| 6717 | SET_PT_BOTH (ZV, ZV_BYTE); |
| 6718 | |
| 6719 | before = PT; |
| 6720 | before_byte = PT_BYTE; |
| 6721 | |
| 6722 | tem = current_buffer->read_only; |
| 6723 | current_buffer->read_only = Qnil; |
| 6724 | insert_string ("\nProcess "); |
| 6725 | Finsert (1, &p->name); |
| 6726 | insert_string (" "); |
| 6727 | Finsert (1, &msg); |
| 6728 | current_buffer->read_only = tem; |
| 6729 | set_marker_both (p->mark, p->buffer, PT, PT_BYTE); |
| 6730 | |
| 6731 | if (opoint >= before) |
| 6732 | SET_PT_BOTH (opoint + (PT - before), |
| 6733 | opoint_byte + (PT_BYTE - before_byte)); |
| 6734 | else |
| 6735 | SET_PT_BOTH (opoint, opoint_byte); |
| 6736 | |
| 6737 | set_buffer_internal (old); |
| 6738 | } |
| 6739 | } |
| 6740 | } /* end for */ |
| 6741 | |
| 6742 | update_mode_lines++; /* in case buffers use %s in mode-line-format */ |
| 6743 | redisplay_preserve_echo_area (13); |
| 6744 | |
| 6745 | UNGCPRO; |
| 6746 | } |
| 6747 | |
| 6748 | \f |
| 6749 | DEFUN ("set-process-coding-system", Fset_process_coding_system, |
| 6750 | Sset_process_coding_system, 1, 3, 0, |
| 6751 | doc: /* Set coding systems of PROCESS to DECODING and ENCODING. |
| 6752 | DECODING will be used to decode subprocess output and ENCODING to |
| 6753 | encode subprocess input. */) |
| 6754 | (process, decoding, encoding) |
| 6755 | register Lisp_Object process, decoding, encoding; |
| 6756 | { |
| 6757 | register struct Lisp_Process *p; |
| 6758 | |
| 6759 | CHECK_PROCESS (process); |
| 6760 | p = XPROCESS (process); |
| 6761 | if (XINT (p->infd) < 0) |
| 6762 | error ("Input file descriptor of %s closed", SDATA (p->name)); |
| 6763 | if (XINT (p->outfd) < 0) |
| 6764 | error ("Output file descriptor of %s closed", SDATA (p->name)); |
| 6765 | Fcheck_coding_system (decoding); |
| 6766 | Fcheck_coding_system (encoding); |
| 6767 | |
| 6768 | p->decode_coding_system = decoding; |
| 6769 | p->encode_coding_system = encoding; |
| 6770 | setup_process_coding_systems (process); |
| 6771 | |
| 6772 | return Qnil; |
| 6773 | } |
| 6774 | |
| 6775 | DEFUN ("process-coding-system", |
| 6776 | Fprocess_coding_system, Sprocess_coding_system, 1, 1, 0, |
| 6777 | doc: /* Return a cons of coding systems for decoding and encoding of PROCESS. */) |
| 6778 | (process) |
| 6779 | register Lisp_Object process; |
| 6780 | { |
| 6781 | CHECK_PROCESS (process); |
| 6782 | return Fcons (XPROCESS (process)->decode_coding_system, |
| 6783 | XPROCESS (process)->encode_coding_system); |
| 6784 | } |
| 6785 | |
| 6786 | DEFUN ("set-process-filter-multibyte", Fset_process_filter_multibyte, |
| 6787 | Sset_process_filter_multibyte, 2, 2, 0, |
| 6788 | doc: /* Set multibyteness of the strings given to PROCESS's filter. |
| 6789 | If FLAG is non-nil, the filter is given multibyte strings. |
| 6790 | If FLAG is nil, the filter is given unibyte strings. In this case, |
| 6791 | all character code conversion except for end-of-line conversion is |
| 6792 | suppressed. */) |
| 6793 | (process, flag) |
| 6794 | Lisp_Object process, flag; |
| 6795 | { |
| 6796 | register struct Lisp_Process *p; |
| 6797 | |
| 6798 | CHECK_PROCESS (process); |
| 6799 | p = XPROCESS (process); |
| 6800 | p->filter_multibyte = flag; |
| 6801 | setup_process_coding_systems (process); |
| 6802 | |
| 6803 | return Qnil; |
| 6804 | } |
| 6805 | |
| 6806 | DEFUN ("process-filter-multibyte-p", Fprocess_filter_multibyte_p, |
| 6807 | Sprocess_filter_multibyte_p, 1, 1, 0, |
| 6808 | doc: /* Return t if a multibyte string is given to PROCESS's filter.*/) |
| 6809 | (process) |
| 6810 | Lisp_Object process; |
| 6811 | { |
| 6812 | register struct Lisp_Process *p; |
| 6813 | |
| 6814 | CHECK_PROCESS (process); |
| 6815 | p = XPROCESS (process); |
| 6816 | |
| 6817 | return (NILP (p->filter_multibyte) ? Qnil : Qt); |
| 6818 | } |
| 6819 | |
| 6820 | |
| 6821 | \f |
| 6822 | /* The first time this is called, assume keyboard input comes from DESC |
| 6823 | instead of from where we used to expect it. |
| 6824 | Subsequent calls mean assume input keyboard can come from DESC |
| 6825 | in addition to other places. */ |
| 6826 | |
| 6827 | static int add_keyboard_wait_descriptor_called_flag; |
| 6828 | |
| 6829 | void |
| 6830 | add_keyboard_wait_descriptor (desc) |
| 6831 | int desc; |
| 6832 | { |
| 6833 | if (! add_keyboard_wait_descriptor_called_flag) |
| 6834 | FD_CLR (0, &input_wait_mask); |
| 6835 | add_keyboard_wait_descriptor_called_flag = 1; |
| 6836 | FD_SET (desc, &input_wait_mask); |
| 6837 | FD_SET (desc, &non_process_wait_mask); |
| 6838 | if (desc > max_keyboard_desc) |
| 6839 | max_keyboard_desc = desc; |
| 6840 | } |
| 6841 | |
| 6842 | /* From now on, do not expect DESC to give keyboard input. */ |
| 6843 | |
| 6844 | void |
| 6845 | delete_keyboard_wait_descriptor (desc) |
| 6846 | int desc; |
| 6847 | { |
| 6848 | int fd; |
| 6849 | int lim = max_keyboard_desc; |
| 6850 | |
| 6851 | FD_CLR (desc, &input_wait_mask); |
| 6852 | FD_CLR (desc, &non_process_wait_mask); |
| 6853 | |
| 6854 | if (desc == max_keyboard_desc) |
| 6855 | for (fd = 0; fd < lim; fd++) |
| 6856 | if (FD_ISSET (fd, &input_wait_mask) |
| 6857 | && !FD_ISSET (fd, &non_keyboard_wait_mask)) |
| 6858 | max_keyboard_desc = fd; |
| 6859 | } |
| 6860 | |
| 6861 | /* Return nonzero if *MASK has a bit set |
| 6862 | that corresponds to one of the keyboard input descriptors. */ |
| 6863 | |
| 6864 | static int |
| 6865 | keyboard_bit_set (mask) |
| 6866 | SELECT_TYPE *mask; |
| 6867 | { |
| 6868 | int fd; |
| 6869 | |
| 6870 | for (fd = 0; fd <= max_keyboard_desc; fd++) |
| 6871 | if (FD_ISSET (fd, mask) && FD_ISSET (fd, &input_wait_mask) |
| 6872 | && !FD_ISSET (fd, &non_keyboard_wait_mask)) |
| 6873 | return 1; |
| 6874 | |
| 6875 | return 0; |
| 6876 | } |
| 6877 | \f |
| 6878 | void |
| 6879 | init_process () |
| 6880 | { |
| 6881 | register int i; |
| 6882 | |
| 6883 | #ifdef SIGCHLD |
| 6884 | #ifndef CANNOT_DUMP |
| 6885 | if (! noninteractive || initialized) |
| 6886 | #endif |
| 6887 | signal (SIGCHLD, sigchld_handler); |
| 6888 | #endif |
| 6889 | |
| 6890 | FD_ZERO (&input_wait_mask); |
| 6891 | FD_ZERO (&non_keyboard_wait_mask); |
| 6892 | FD_ZERO (&non_process_wait_mask); |
| 6893 | max_process_desc = 0; |
| 6894 | |
| 6895 | #ifdef NON_BLOCKING_CONNECT |
| 6896 | FD_ZERO (&connect_wait_mask); |
| 6897 | num_pending_connects = 0; |
| 6898 | #endif |
| 6899 | |
| 6900 | #ifdef ADAPTIVE_READ_BUFFERING |
| 6901 | process_output_delay_count = 0; |
| 6902 | process_output_skip = 0; |
| 6903 | #endif |
| 6904 | |
| 6905 | FD_SET (0, &input_wait_mask); |
| 6906 | |
| 6907 | Vprocess_alist = Qnil; |
| 6908 | #ifdef SIGCHLD |
| 6909 | deleted_pid_list = Qnil; |
| 6910 | #endif |
| 6911 | for (i = 0; i < MAXDESC; i++) |
| 6912 | { |
| 6913 | chan_process[i] = Qnil; |
| 6914 | proc_buffered_char[i] = -1; |
| 6915 | } |
| 6916 | bzero (proc_decode_coding_system, sizeof proc_decode_coding_system); |
| 6917 | bzero (proc_encode_coding_system, sizeof proc_encode_coding_system); |
| 6918 | #ifdef DATAGRAM_SOCKETS |
| 6919 | bzero (datagram_address, sizeof datagram_address); |
| 6920 | #endif |
| 6921 | |
| 6922 | #ifdef HAVE_SOCKETS |
| 6923 | { |
| 6924 | Lisp_Object subfeatures = Qnil; |
| 6925 | struct socket_options *sopt; |
| 6926 | |
| 6927 | #define ADD_SUBFEATURE(key, val) \ |
| 6928 | subfeatures = Fcons (Fcons (key, Fcons (val, Qnil)), subfeatures) |
| 6929 | |
| 6930 | #ifdef NON_BLOCKING_CONNECT |
| 6931 | ADD_SUBFEATURE (QCnowait, Qt); |
| 6932 | #endif |
| 6933 | #ifdef DATAGRAM_SOCKETS |
| 6934 | ADD_SUBFEATURE (QCtype, Qdatagram); |
| 6935 | #endif |
| 6936 | #ifdef HAVE_LOCAL_SOCKETS |
| 6937 | ADD_SUBFEATURE (QCfamily, Qlocal); |
| 6938 | #endif |
| 6939 | ADD_SUBFEATURE (QCfamily, Qipv4); |
| 6940 | #ifdef AF_INET6 |
| 6941 | ADD_SUBFEATURE (QCfamily, Qipv6); |
| 6942 | #endif |
| 6943 | #ifdef HAVE_GETSOCKNAME |
| 6944 | ADD_SUBFEATURE (QCservice, Qt); |
| 6945 | #endif |
| 6946 | #if !defined(TERM) && (defined(O_NONBLOCK) || defined(O_NDELAY)) |
| 6947 | ADD_SUBFEATURE (QCserver, Qt); |
| 6948 | #endif |
| 6949 | |
| 6950 | for (sopt = socket_options; sopt->name; sopt++) |
| 6951 | subfeatures = Fcons (intern (sopt->name), subfeatures); |
| 6952 | |
| 6953 | Fprovide (intern ("make-network-process"), subfeatures); |
| 6954 | } |
| 6955 | #endif /* HAVE_SOCKETS */ |
| 6956 | |
| 6957 | #if defined (DARWIN) || defined (MAC_OSX) |
| 6958 | /* PTYs are broken on Darwin < 6, but are sometimes useful for interactive |
| 6959 | processes. As such, we only change the default value. */ |
| 6960 | if (initialized) |
| 6961 | { |
| 6962 | char *release = get_operating_system_release(); |
| 6963 | if (!release || !release[0] || (release[0] < MIN_PTY_KERNEL_VERSION |
| 6964 | && release[1] == '.')) { |
| 6965 | Vprocess_connection_type = Qnil; |
| 6966 | } |
| 6967 | } |
| 6968 | #endif |
| 6969 | } |
| 6970 | |
| 6971 | void |
| 6972 | syms_of_process () |
| 6973 | { |
| 6974 | Qprocessp = intern ("processp"); |
| 6975 | staticpro (&Qprocessp); |
| 6976 | Qrun = intern ("run"); |
| 6977 | staticpro (&Qrun); |
| 6978 | Qstop = intern ("stop"); |
| 6979 | staticpro (&Qstop); |
| 6980 | Qsignal = intern ("signal"); |
| 6981 | staticpro (&Qsignal); |
| 6982 | |
| 6983 | /* Qexit is already staticpro'd by syms_of_eval; don't staticpro it |
| 6984 | here again. |
| 6985 | |
| 6986 | Qexit = intern ("exit"); |
| 6987 | staticpro (&Qexit); */ |
| 6988 | |
| 6989 | Qopen = intern ("open"); |
| 6990 | staticpro (&Qopen); |
| 6991 | Qclosed = intern ("closed"); |
| 6992 | staticpro (&Qclosed); |
| 6993 | Qconnect = intern ("connect"); |
| 6994 | staticpro (&Qconnect); |
| 6995 | Qfailed = intern ("failed"); |
| 6996 | staticpro (&Qfailed); |
| 6997 | Qlisten = intern ("listen"); |
| 6998 | staticpro (&Qlisten); |
| 6999 | Qlocal = intern ("local"); |
| 7000 | staticpro (&Qlocal); |
| 7001 | Qipv4 = intern ("ipv4"); |
| 7002 | staticpro (&Qipv4); |
| 7003 | #ifdef AF_INET6 |
| 7004 | Qipv6 = intern ("ipv6"); |
| 7005 | staticpro (&Qipv6); |
| 7006 | #endif |
| 7007 | Qdatagram = intern ("datagram"); |
| 7008 | staticpro (&Qdatagram); |
| 7009 | |
| 7010 | QCname = intern (":name"); |
| 7011 | staticpro (&QCname); |
| 7012 | QCbuffer = intern (":buffer"); |
| 7013 | staticpro (&QCbuffer); |
| 7014 | QChost = intern (":host"); |
| 7015 | staticpro (&QChost); |
| 7016 | QCservice = intern (":service"); |
| 7017 | staticpro (&QCservice); |
| 7018 | QCtype = intern (":type"); |
| 7019 | staticpro (&QCtype); |
| 7020 | QClocal = intern (":local"); |
| 7021 | staticpro (&QClocal); |
| 7022 | QCremote = intern (":remote"); |
| 7023 | staticpro (&QCremote); |
| 7024 | QCcoding = intern (":coding"); |
| 7025 | staticpro (&QCcoding); |
| 7026 | QCserver = intern (":server"); |
| 7027 | staticpro (&QCserver); |
| 7028 | QCnowait = intern (":nowait"); |
| 7029 | staticpro (&QCnowait); |
| 7030 | QCsentinel = intern (":sentinel"); |
| 7031 | staticpro (&QCsentinel); |
| 7032 | QClog = intern (":log"); |
| 7033 | staticpro (&QClog); |
| 7034 | QCnoquery = intern (":noquery"); |
| 7035 | staticpro (&QCnoquery); |
| 7036 | QCstop = intern (":stop"); |
| 7037 | staticpro (&QCstop); |
| 7038 | QCoptions = intern (":options"); |
| 7039 | staticpro (&QCoptions); |
| 7040 | QCplist = intern (":plist"); |
| 7041 | staticpro (&QCplist); |
| 7042 | QCfilter_multibyte = intern (":filter-multibyte"); |
| 7043 | staticpro (&QCfilter_multibyte); |
| 7044 | |
| 7045 | Qlast_nonmenu_event = intern ("last-nonmenu-event"); |
| 7046 | staticpro (&Qlast_nonmenu_event); |
| 7047 | |
| 7048 | staticpro (&Vprocess_alist); |
| 7049 | #ifdef SIGCHLD |
| 7050 | staticpro (&deleted_pid_list); |
| 7051 | #endif |
| 7052 | |
| 7053 | DEFVAR_BOOL ("delete-exited-processes", &delete_exited_processes, |
| 7054 | doc: /* *Non-nil means delete processes immediately when they exit. |
| 7055 | nil means don't delete them until `list-processes' is run. */); |
| 7056 | |
| 7057 | delete_exited_processes = 1; |
| 7058 | |
| 7059 | DEFVAR_LISP ("process-connection-type", &Vprocess_connection_type, |
| 7060 | doc: /* Control type of device used to communicate with subprocesses. |
| 7061 | Values are nil to use a pipe, or t or `pty' to use a pty. |
| 7062 | The value has no effect if the system has no ptys or if all ptys are busy: |
| 7063 | then a pipe is used in any case. |
| 7064 | The value takes effect when `start-process' is called. */); |
| 7065 | Vprocess_connection_type = Qt; |
| 7066 | |
| 7067 | #ifdef ADAPTIVE_READ_BUFFERING |
| 7068 | DEFVAR_LISP ("process-adaptive-read-buffering", &Vprocess_adaptive_read_buffering, |
| 7069 | doc: /* If non-nil, improve receive buffering by delaying after short reads. |
| 7070 | On some systems, when Emacs reads the output from a subprocess, the output data |
| 7071 | is read in very small blocks, potentially resulting in very poor performance. |
| 7072 | This behavior can be remedied to some extent by setting this variable to a |
| 7073 | non-nil value, as it will automatically delay reading from such processes, to |
| 7074 | allow them to produce more output before Emacs tries to read it. |
| 7075 | If the value is t, the delay is reset after each write to the process; any other |
| 7076 | non-nil value means that the delay is not reset on write. |
| 7077 | The variable takes effect when `start-process' is called. */); |
| 7078 | Vprocess_adaptive_read_buffering = Qt; |
| 7079 | #endif |
| 7080 | |
| 7081 | defsubr (&Sprocessp); |
| 7082 | defsubr (&Sget_process); |
| 7083 | defsubr (&Sget_buffer_process); |
| 7084 | defsubr (&Sdelete_process); |
| 7085 | defsubr (&Sprocess_status); |
| 7086 | defsubr (&Sprocess_exit_status); |
| 7087 | defsubr (&Sprocess_id); |
| 7088 | defsubr (&Sprocess_name); |
| 7089 | defsubr (&Sprocess_tty_name); |
| 7090 | defsubr (&Sprocess_command); |
| 7091 | defsubr (&Sset_process_buffer); |
| 7092 | defsubr (&Sprocess_buffer); |
| 7093 | defsubr (&Sprocess_mark); |
| 7094 | defsubr (&Sset_process_filter); |
| 7095 | defsubr (&Sprocess_filter); |
| 7096 | defsubr (&Sset_process_sentinel); |
| 7097 | defsubr (&Sprocess_sentinel); |
| 7098 | defsubr (&Sset_process_window_size); |
| 7099 | defsubr (&Sset_process_inherit_coding_system_flag); |
| 7100 | defsubr (&Sprocess_inherit_coding_system_flag); |
| 7101 | defsubr (&Sset_process_query_on_exit_flag); |
| 7102 | defsubr (&Sprocess_query_on_exit_flag); |
| 7103 | defsubr (&Sprocess_contact); |
| 7104 | defsubr (&Sprocess_plist); |
| 7105 | defsubr (&Sset_process_plist); |
| 7106 | defsubr (&Slist_processes); |
| 7107 | defsubr (&Sprocess_list); |
| 7108 | defsubr (&Sstart_process); |
| 7109 | #ifdef HAVE_SOCKETS |
| 7110 | defsubr (&Sset_network_process_option); |
| 7111 | defsubr (&Smake_network_process); |
| 7112 | defsubr (&Sformat_network_address); |
| 7113 | #endif /* HAVE_SOCKETS */ |
| 7114 | #if defined(HAVE_SOCKETS) && defined(HAVE_NET_IF_H) && defined(HAVE_SYS_IOCTL_H) |
| 7115 | #ifdef SIOCGIFCONF |
| 7116 | defsubr (&Snetwork_interface_list); |
| 7117 | #endif |
| 7118 | #if defined(SIOCGIFADDR) || defined(SIOCGIFHWADDR) || defined(SIOCGIFFLAGS) |
| 7119 | defsubr (&Snetwork_interface_info); |
| 7120 | #endif |
| 7121 | #endif /* HAVE_SOCKETS ... */ |
| 7122 | #ifdef DATAGRAM_SOCKETS |
| 7123 | defsubr (&Sprocess_datagram_address); |
| 7124 | defsubr (&Sset_process_datagram_address); |
| 7125 | #endif |
| 7126 | defsubr (&Saccept_process_output); |
| 7127 | defsubr (&Sprocess_send_region); |
| 7128 | defsubr (&Sprocess_send_string); |
| 7129 | defsubr (&Sinterrupt_process); |
| 7130 | defsubr (&Skill_process); |
| 7131 | defsubr (&Squit_process); |
| 7132 | defsubr (&Sstop_process); |
| 7133 | defsubr (&Scontinue_process); |
| 7134 | defsubr (&Sprocess_running_child_p); |
| 7135 | defsubr (&Sprocess_send_eof); |
| 7136 | defsubr (&Ssignal_process); |
| 7137 | defsubr (&Swaiting_for_user_input_p); |
| 7138 | /* defsubr (&Sprocess_connection); */ |
| 7139 | defsubr (&Sset_process_coding_system); |
| 7140 | defsubr (&Sprocess_coding_system); |
| 7141 | defsubr (&Sset_process_filter_multibyte); |
| 7142 | defsubr (&Sprocess_filter_multibyte_p); |
| 7143 | } |
| 7144 | |
| 7145 | \f |
| 7146 | #else /* not subprocesses */ |
| 7147 | |
| 7148 | #include <sys/types.h> |
| 7149 | #include <errno.h> |
| 7150 | |
| 7151 | #include "lisp.h" |
| 7152 | #include "systime.h" |
| 7153 | #include "charset.h" |
| 7154 | #include "coding.h" |
| 7155 | #include "termopts.h" |
| 7156 | #include "sysselect.h" |
| 7157 | |
| 7158 | extern int frame_garbaged; |
| 7159 | |
| 7160 | extern EMACS_TIME timer_check (); |
| 7161 | extern int timers_run; |
| 7162 | |
| 7163 | Lisp_Object QCtype; |
| 7164 | |
| 7165 | /* As described above, except assuming that there are no subprocesses: |
| 7166 | |
| 7167 | Wait for timeout to elapse and/or keyboard input to be available. |
| 7168 | |
| 7169 | time_limit is: |
| 7170 | timeout in seconds, or |
| 7171 | zero for no limit, or |
| 7172 | -1 means gobble data immediately available but don't wait for any. |
| 7173 | |
| 7174 | read_kbd is a Lisp_Object: |
| 7175 | 0 to ignore keyboard input, or |
| 7176 | 1 to return when input is available, or |
| 7177 | -1 means caller will actually read the input, so don't throw to |
| 7178 | the quit handler. |
| 7179 | |
| 7180 | see full version for other parameters. We know that wait_proc will |
| 7181 | always be NULL, since `subprocesses' isn't defined. |
| 7182 | |
| 7183 | do_display != 0 means redisplay should be done to show subprocess |
| 7184 | output that arrives. |
| 7185 | |
| 7186 | Return true iff we received input from any process. */ |
| 7187 | |
| 7188 | int |
| 7189 | wait_reading_process_output (time_limit, microsecs, read_kbd, do_display, |
| 7190 | wait_for_cell, wait_proc, just_wait_proc) |
| 7191 | int time_limit, microsecs, read_kbd, do_display; |
| 7192 | Lisp_Object wait_for_cell; |
| 7193 | struct Lisp_Process *wait_proc; |
| 7194 | int just_wait_proc; |
| 7195 | { |
| 7196 | register int nfds; |
| 7197 | EMACS_TIME end_time, timeout; |
| 7198 | SELECT_TYPE waitchannels; |
| 7199 | int xerrno; |
| 7200 | |
| 7201 | /* What does time_limit really mean? */ |
| 7202 | if (time_limit || microsecs) |
| 7203 | { |
| 7204 | EMACS_GET_TIME (end_time); |
| 7205 | EMACS_SET_SECS_USECS (timeout, time_limit, microsecs); |
| 7206 | EMACS_ADD_TIME (end_time, end_time, timeout); |
| 7207 | } |
| 7208 | |
| 7209 | /* Turn off periodic alarms (in case they are in use) |
| 7210 | and then turn off any other atimers, |
| 7211 | because the select emulator uses alarms. */ |
| 7212 | stop_polling (); |
| 7213 | turn_on_atimers (0); |
| 7214 | |
| 7215 | while (1) |
| 7216 | { |
| 7217 | int timeout_reduced_for_timers = 0; |
| 7218 | |
| 7219 | /* If calling from keyboard input, do not quit |
| 7220 | since we want to return C-g as an input character. |
| 7221 | Otherwise, do pending quit if requested. */ |
| 7222 | if (read_kbd >= 0) |
| 7223 | QUIT; |
| 7224 | |
| 7225 | /* Exit now if the cell we're waiting for became non-nil. */ |
| 7226 | if (! NILP (wait_for_cell) && ! NILP (XCAR (wait_for_cell))) |
| 7227 | break; |
| 7228 | |
| 7229 | /* Compute time from now till when time limit is up */ |
| 7230 | /* Exit if already run out */ |
| 7231 | if (time_limit == -1) |
| 7232 | { |
| 7233 | /* -1 specified for timeout means |
| 7234 | gobble output available now |
| 7235 | but don't wait at all. */ |
| 7236 | |
| 7237 | EMACS_SET_SECS_USECS (timeout, 0, 0); |
| 7238 | } |
| 7239 | else if (time_limit || microsecs) |
| 7240 | { |
| 7241 | EMACS_GET_TIME (timeout); |
| 7242 | EMACS_SUB_TIME (timeout, end_time, timeout); |
| 7243 | if (EMACS_TIME_NEG_P (timeout)) |
| 7244 | break; |
| 7245 | } |
| 7246 | else |
| 7247 | { |
| 7248 | EMACS_SET_SECS_USECS (timeout, 100000, 0); |
| 7249 | } |
| 7250 | |
| 7251 | /* If our caller will not immediately handle keyboard events, |
| 7252 | run timer events directly. |
| 7253 | (Callers that will immediately read keyboard events |
| 7254 | call timer_delay on their own.) */ |
| 7255 | if (NILP (wait_for_cell)) |
| 7256 | { |
| 7257 | EMACS_TIME timer_delay; |
| 7258 | |
| 7259 | do |
| 7260 | { |
| 7261 | int old_timers_run = timers_run; |
| 7262 | timer_delay = timer_check (1); |
| 7263 | if (timers_run != old_timers_run && do_display) |
| 7264 | /* We must retry, since a timer may have requeued itself |
| 7265 | and that could alter the time delay. */ |
| 7266 | redisplay_preserve_echo_area (14); |
| 7267 | else |
| 7268 | break; |
| 7269 | } |
| 7270 | while (!detect_input_pending ()); |
| 7271 | |
| 7272 | /* If there is unread keyboard input, also return. */ |
| 7273 | if (read_kbd != 0 |
| 7274 | && requeued_events_pending_p ()) |
| 7275 | break; |
| 7276 | |
| 7277 | if (! EMACS_TIME_NEG_P (timer_delay) && time_limit != -1) |
| 7278 | { |
| 7279 | EMACS_TIME difference; |
| 7280 | EMACS_SUB_TIME (difference, timer_delay, timeout); |
| 7281 | if (EMACS_TIME_NEG_P (difference)) |
| 7282 | { |
| 7283 | timeout = timer_delay; |
| 7284 | timeout_reduced_for_timers = 1; |
| 7285 | } |
| 7286 | } |
| 7287 | } |
| 7288 | |
| 7289 | /* Cause C-g and alarm signals to take immediate action, |
| 7290 | and cause input available signals to zero out timeout. */ |
| 7291 | if (read_kbd < 0) |
| 7292 | set_waiting_for_input (&timeout); |
| 7293 | |
| 7294 | /* Wait till there is something to do. */ |
| 7295 | |
| 7296 | if (! read_kbd && NILP (wait_for_cell)) |
| 7297 | FD_ZERO (&waitchannels); |
| 7298 | else |
| 7299 | FD_SET (0, &waitchannels); |
| 7300 | |
| 7301 | /* If a frame has been newly mapped and needs updating, |
| 7302 | reprocess its display stuff. */ |
| 7303 | if (frame_garbaged && do_display) |
| 7304 | { |
| 7305 | clear_waiting_for_input (); |
| 7306 | redisplay_preserve_echo_area (15); |
| 7307 | if (read_kbd < 0) |
| 7308 | set_waiting_for_input (&timeout); |
| 7309 | } |
| 7310 | |
| 7311 | if (read_kbd && detect_input_pending ()) |
| 7312 | { |
| 7313 | nfds = 0; |
| 7314 | FD_ZERO (&waitchannels); |
| 7315 | } |
| 7316 | else |
| 7317 | nfds = select (1, &waitchannels, (SELECT_TYPE *)0, (SELECT_TYPE *)0, |
| 7318 | &timeout); |
| 7319 | |
| 7320 | xerrno = errno; |
| 7321 | |
| 7322 | /* Make C-g and alarm signals set flags again */ |
| 7323 | clear_waiting_for_input (); |
| 7324 | |
| 7325 | /* If we woke up due to SIGWINCH, actually change size now. */ |
| 7326 | do_pending_window_change (0); |
| 7327 | |
| 7328 | if (time_limit && nfds == 0 && ! timeout_reduced_for_timers) |
| 7329 | /* We waited the full specified time, so return now. */ |
| 7330 | break; |
| 7331 | |
| 7332 | if (nfds == -1) |
| 7333 | { |
| 7334 | /* If the system call was interrupted, then go around the |
| 7335 | loop again. */ |
| 7336 | if (xerrno == EINTR) |
| 7337 | FD_ZERO (&waitchannels); |
| 7338 | else |
| 7339 | error ("select error: %s", emacs_strerror (xerrno)); |
| 7340 | } |
| 7341 | #ifdef sun |
| 7342 | else if (nfds > 0 && (waitchannels & 1) && interrupt_input) |
| 7343 | /* System sometimes fails to deliver SIGIO. */ |
| 7344 | kill (getpid (), SIGIO); |
| 7345 | #endif |
| 7346 | #ifdef SIGIO |
| 7347 | if (read_kbd && interrupt_input && (waitchannels & 1)) |
| 7348 | kill (getpid (), SIGIO); |
| 7349 | #endif |
| 7350 | |
| 7351 | /* Check for keyboard input */ |
| 7352 | |
| 7353 | if (read_kbd |
| 7354 | && detect_input_pending_run_timers (do_display)) |
| 7355 | { |
| 7356 | swallow_events (do_display); |
| 7357 | if (detect_input_pending_run_timers (do_display)) |
| 7358 | break; |
| 7359 | } |
| 7360 | |
| 7361 | /* If there is unread keyboard input, also return. */ |
| 7362 | if (read_kbd |
| 7363 | && requeued_events_pending_p ()) |
| 7364 | break; |
| 7365 | |
| 7366 | /* If wait_for_cell. check for keyboard input |
| 7367 | but don't run any timers. |
| 7368 | ??? (It seems wrong to me to check for keyboard |
| 7369 | input at all when wait_for_cell, but the code |
| 7370 | has been this way since July 1994. |
| 7371 | Try changing this after version 19.31.) */ |
| 7372 | if (! NILP (wait_for_cell) |
| 7373 | && detect_input_pending ()) |
| 7374 | { |
| 7375 | swallow_events (do_display); |
| 7376 | if (detect_input_pending ()) |
| 7377 | break; |
| 7378 | } |
| 7379 | |
| 7380 | /* Exit now if the cell we're waiting for became non-nil. */ |
| 7381 | if (! NILP (wait_for_cell) && ! NILP (XCAR (wait_for_cell))) |
| 7382 | break; |
| 7383 | } |
| 7384 | |
| 7385 | start_polling (); |
| 7386 | |
| 7387 | return 0; |
| 7388 | } |
| 7389 | |
| 7390 | |
| 7391 | /* Don't confuse make-docfile by having two doc strings for this function. |
| 7392 | make-docfile does not pay attention to #if, for good reason! */ |
| 7393 | DEFUN ("get-buffer-process", Fget_buffer_process, Sget_buffer_process, 1, 1, 0, |
| 7394 | 0) |
| 7395 | (name) |
| 7396 | register Lisp_Object name; |
| 7397 | { |
| 7398 | return Qnil; |
| 7399 | } |
| 7400 | |
| 7401 | /* Don't confuse make-docfile by having two doc strings for this function. |
| 7402 | make-docfile does not pay attention to #if, for good reason! */ |
| 7403 | DEFUN ("process-inherit-coding-system-flag", |
| 7404 | Fprocess_inherit_coding_system_flag, Sprocess_inherit_coding_system_flag, |
| 7405 | 1, 1, 0, |
| 7406 | 0) |
| 7407 | (process) |
| 7408 | register Lisp_Object process; |
| 7409 | { |
| 7410 | /* Ignore the argument and return the value of |
| 7411 | inherit-process-coding-system. */ |
| 7412 | return inherit_process_coding_system ? Qt : Qnil; |
| 7413 | } |
| 7414 | |
| 7415 | /* Kill all processes associated with `buffer'. |
| 7416 | If `buffer' is nil, kill all processes. |
| 7417 | Since we have no subprocesses, this does nothing. */ |
| 7418 | |
| 7419 | void |
| 7420 | kill_buffer_processes (buffer) |
| 7421 | Lisp_Object buffer; |
| 7422 | { |
| 7423 | } |
| 7424 | |
| 7425 | void |
| 7426 | init_process () |
| 7427 | { |
| 7428 | } |
| 7429 | |
| 7430 | void |
| 7431 | syms_of_process () |
| 7432 | { |
| 7433 | QCtype = intern (":type"); |
| 7434 | staticpro (&QCtype); |
| 7435 | |
| 7436 | defsubr (&Sget_buffer_process); |
| 7437 | defsubr (&Sprocess_inherit_coding_system_flag); |
| 7438 | } |
| 7439 | |
| 7440 | \f |
| 7441 | #endif /* not subprocesses */ |
| 7442 | |
| 7443 | /* arch-tag: 3706c011-7b9a-4117-bd4f-59e7f701a4c4 |
| 7444 | (do not change this comment) */ |