| 1 | /* Asynchronous subprocess control for GNU Emacs. |
| 2 | Copyright (C) 1985, 86, 87, 88, 93, 94, 95, 1996 |
| 3 | Free Software Foundation, Inc. |
| 4 | |
| 5 | This file is part of GNU Emacs. |
| 6 | |
| 7 | GNU Emacs is free software; you can redistribute it and/or modify |
| 8 | it under the terms of the GNU General Public License as published by |
| 9 | the Free Software Foundation; either version 2, or (at your option) |
| 10 | any later version. |
| 11 | |
| 12 | GNU Emacs is distributed in the hope that it will be useful, |
| 13 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 14 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 15 | GNU General Public License for more details. |
| 16 | |
| 17 | You should have received a copy of the GNU General Public License |
| 18 | along with GNU Emacs; see the file COPYING. If not, write to |
| 19 | the Free Software Foundation, Inc., 59 Temple Place - Suite 330, |
| 20 | Boston, MA 02111-1307, USA. */ |
| 21 | |
| 22 | |
| 23 | #include <signal.h> |
| 24 | |
| 25 | #include <config.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_UNISTD_H |
| 44 | #include <unistd.h> |
| 45 | #endif |
| 46 | |
| 47 | #ifdef WINDOWSNT |
| 48 | #include <stdlib.h> |
| 49 | #include <fcntl.h> |
| 50 | #endif /* not WINDOWSNT */ |
| 51 | |
| 52 | #ifdef HAVE_SOCKETS /* TCP connection support, if kernel can do it */ |
| 53 | #include <sys/socket.h> |
| 54 | #include <netdb.h> |
| 55 | #include <netinet/in.h> |
| 56 | #include <arpa/inet.h> |
| 57 | #ifdef NEED_NET_ERRNO_H |
| 58 | #include <net/errno.h> |
| 59 | #endif /* NEED_NET_ERRNO_H */ |
| 60 | #endif /* HAVE_SOCKETS */ |
| 61 | |
| 62 | /* TERM is a poor-man's SLIP, used on Linux. */ |
| 63 | #ifdef TERM |
| 64 | #include <client.h> |
| 65 | #endif |
| 66 | |
| 67 | /* On some systems, e.g. DGUX, inet_addr returns a 'struct in_addr'. */ |
| 68 | #ifdef HAVE_BROKEN_INET_ADDR |
| 69 | #define IN_ADDR struct in_addr |
| 70 | #define NUMERIC_ADDR_ERROR (numeric_addr.s_addr == -1) |
| 71 | #else |
| 72 | #define IN_ADDR unsigned long |
| 73 | #define NUMERIC_ADDR_ERROR (numeric_addr == -1) |
| 74 | #endif |
| 75 | |
| 76 | #if defined(BSD_SYSTEM) || defined(STRIDE) |
| 77 | #include <sys/ioctl.h> |
| 78 | #if !defined (O_NDELAY) && defined (HAVE_PTYS) && !defined(USG5) |
| 79 | #include <fcntl.h> |
| 80 | #endif /* HAVE_PTYS and no O_NDELAY */ |
| 81 | #endif /* BSD_SYSTEM || STRIDE */ |
| 82 | |
| 83 | #ifdef BROKEN_O_NONBLOCK |
| 84 | #undef O_NONBLOCK |
| 85 | #endif /* BROKEN_O_NONBLOCK */ |
| 86 | |
| 87 | #ifdef NEED_BSDTTY |
| 88 | #include <bsdtty.h> |
| 89 | #endif |
| 90 | |
| 91 | #ifdef IRIS |
| 92 | #include <sys/sysmacros.h> /* for "minor" */ |
| 93 | #endif /* not IRIS */ |
| 94 | |
| 95 | #include "systime.h" |
| 96 | #include "systty.h" |
| 97 | |
| 98 | #include "lisp.h" |
| 99 | #include "window.h" |
| 100 | #include "buffer.h" |
| 101 | #include "charset.h" |
| 102 | #include "coding.h" |
| 103 | #include "process.h" |
| 104 | #include "termhooks.h" |
| 105 | #include "termopts.h" |
| 106 | #include "commands.h" |
| 107 | #include "frame.h" |
| 108 | #include "blockinput.h" |
| 109 | |
| 110 | #define max(a, b) ((a) > (b) ? (a) : (b)) |
| 111 | |
| 112 | Lisp_Object Qprocessp; |
| 113 | Lisp_Object Qrun, Qstop, Qsignal, Qopen, Qclosed; |
| 114 | Lisp_Object Qlast_nonmenu_event; |
| 115 | /* Qexit is declared and initialized in eval.c. */ |
| 116 | |
| 117 | /* a process object is a network connection when its childp field is neither |
| 118 | Qt nor Qnil but is instead a cons cell (HOSTNAME PORTNUM). */ |
| 119 | |
| 120 | #ifdef HAVE_SOCKETS |
| 121 | #define NETCONN_P(p) (GC_CONSP (XPROCESS (p)->childp)) |
| 122 | #else |
| 123 | #define NETCONN_P(p) 0 |
| 124 | #endif /* HAVE_SOCKETS */ |
| 125 | |
| 126 | /* Define first descriptor number available for subprocesses. */ |
| 127 | #ifdef VMS |
| 128 | #define FIRST_PROC_DESC 1 |
| 129 | #else /* Not VMS */ |
| 130 | #define FIRST_PROC_DESC 3 |
| 131 | #endif |
| 132 | |
| 133 | /* Define SIGCHLD as an alias for SIGCLD. There are many conditionals |
| 134 | testing SIGCHLD. */ |
| 135 | |
| 136 | #if !defined (SIGCHLD) && defined (SIGCLD) |
| 137 | #define SIGCHLD SIGCLD |
| 138 | #endif /* SIGCLD */ |
| 139 | |
| 140 | #include "syssignal.h" |
| 141 | |
| 142 | #include "syswait.h" |
| 143 | |
| 144 | extern int errno; |
| 145 | extern char *strerror (); |
| 146 | #ifdef VMS |
| 147 | extern char *sys_errlist[]; |
| 148 | #endif |
| 149 | |
| 150 | #ifndef HAVE_H_ERRNO |
| 151 | extern int h_errno; |
| 152 | #endif |
| 153 | |
| 154 | #ifndef SYS_SIGLIST_DECLARED |
| 155 | #ifndef VMS |
| 156 | #ifndef BSD4_1 |
| 157 | #ifndef WINDOWSNT |
| 158 | #ifndef LINUX |
| 159 | extern char *sys_siglist[]; |
| 160 | #endif /* not LINUX */ |
| 161 | #else /* BSD4_1 */ |
| 162 | char *sys_siglist[] = |
| 163 | { |
| 164 | "bum signal!!", |
| 165 | "hangup", |
| 166 | "interrupt", |
| 167 | "quit", |
| 168 | "illegal instruction", |
| 169 | "trace trap", |
| 170 | "iot instruction", |
| 171 | "emt instruction", |
| 172 | "floating point exception", |
| 173 | "kill", |
| 174 | "bus error", |
| 175 | "segmentation violation", |
| 176 | "bad argument to system call", |
| 177 | "write on a pipe with no one to read it", |
| 178 | "alarm clock", |
| 179 | "software termination signal from kill", |
| 180 | "status signal", |
| 181 | "sendable stop signal not from tty", |
| 182 | "stop signal from tty", |
| 183 | "continue a stopped process", |
| 184 | "child status has changed", |
| 185 | "background read attempted from control tty", |
| 186 | "background write attempted from control tty", |
| 187 | "input record available at control tty", |
| 188 | "exceeded CPU time limit", |
| 189 | "exceeded file size limit" |
| 190 | }; |
| 191 | #endif /* not WINDOWSNT */ |
| 192 | #endif |
| 193 | #endif /* VMS */ |
| 194 | #endif /* ! SYS_SIGLIST_DECLARED */ |
| 195 | |
| 196 | /* t means use pty, nil means use a pipe, |
| 197 | maybe other values to come. */ |
| 198 | static Lisp_Object Vprocess_connection_type; |
| 199 | |
| 200 | #ifdef SKTPAIR |
| 201 | #ifndef HAVE_SOCKETS |
| 202 | #include <sys/socket.h> |
| 203 | #endif |
| 204 | #endif /* SKTPAIR */ |
| 205 | |
| 206 | /* These next two vars are non-static since sysdep.c uses them in the |
| 207 | emulation of `select'. */ |
| 208 | /* Number of events of change of status of a process. */ |
| 209 | int process_tick; |
| 210 | /* Number of events for which the user or sentinel has been notified. */ |
| 211 | int update_tick; |
| 212 | |
| 213 | #include "sysselect.h" |
| 214 | |
| 215 | /* If we support a window system, turn on the code to poll periodically |
| 216 | to detect C-g. It isn't actually used when doing interrupt input. */ |
| 217 | #ifdef HAVE_WINDOW_SYSTEM |
| 218 | #define POLL_FOR_INPUT |
| 219 | #endif |
| 220 | |
| 221 | /* Mask of bits indicating the descriptors that we wait for input on. */ |
| 222 | |
| 223 | static SELECT_TYPE input_wait_mask; |
| 224 | |
| 225 | /* Mask that excludes keyboard input descriptor (s). */ |
| 226 | |
| 227 | static SELECT_TYPE non_keyboard_wait_mask; |
| 228 | |
| 229 | /* Mask that excludes process input descriptor (s). */ |
| 230 | |
| 231 | static SELECT_TYPE non_process_wait_mask; |
| 232 | |
| 233 | /* The largest descriptor currently in use for a process object. */ |
| 234 | static int max_process_desc; |
| 235 | |
| 236 | /* The largest descriptor currently in use for keyboard input. */ |
| 237 | static int max_keyboard_desc; |
| 238 | |
| 239 | /* Nonzero means delete a process right away if it exits. */ |
| 240 | static int delete_exited_processes; |
| 241 | |
| 242 | /* Indexed by descriptor, gives the process (if any) for that descriptor */ |
| 243 | Lisp_Object chan_process[MAXDESC]; |
| 244 | |
| 245 | /* Alist of elements (NAME . PROCESS) */ |
| 246 | Lisp_Object Vprocess_alist; |
| 247 | |
| 248 | /* Buffered-ahead input char from process, indexed by channel. |
| 249 | -1 means empty (no char is buffered). |
| 250 | Used on sys V where the only way to tell if there is any |
| 251 | output from the process is to read at least one char. |
| 252 | Always -1 on systems that support FIONREAD. */ |
| 253 | |
| 254 | /* Don't make static; need to access externally. */ |
| 255 | int proc_buffered_char[MAXDESC]; |
| 256 | |
| 257 | /* Table of `struct coding-system' for each process. */ |
| 258 | static struct coding_system *proc_decode_coding_system[MAXDESC]; |
| 259 | static struct coding_system *proc_encode_coding_system[MAXDESC]; |
| 260 | |
| 261 | static Lisp_Object get_process (); |
| 262 | |
| 263 | extern EMACS_TIME timer_check (); |
| 264 | extern int timers_run; |
| 265 | |
| 266 | /* Maximum number of bytes to send to a pty without an eof. */ |
| 267 | static int pty_max_bytes; |
| 268 | |
| 269 | #ifdef HAVE_PTYS |
| 270 | /* The file name of the pty opened by allocate_pty. */ |
| 271 | |
| 272 | static char pty_name[24]; |
| 273 | #endif |
| 274 | \f |
| 275 | /* Compute the Lisp form of the process status, p->status, from |
| 276 | the numeric status that was returned by `wait'. */ |
| 277 | |
| 278 | Lisp_Object status_convert (); |
| 279 | |
| 280 | update_status (p) |
| 281 | struct Lisp_Process *p; |
| 282 | { |
| 283 | union { int i; WAITTYPE wt; } u; |
| 284 | u.i = XFASTINT (p->raw_status_low) + (XFASTINT (p->raw_status_high) << 16); |
| 285 | p->status = status_convert (u.wt); |
| 286 | p->raw_status_low = Qnil; |
| 287 | p->raw_status_high = Qnil; |
| 288 | } |
| 289 | |
| 290 | /* Convert a process status word in Unix format to |
| 291 | the list that we use internally. */ |
| 292 | |
| 293 | Lisp_Object |
| 294 | status_convert (w) |
| 295 | WAITTYPE w; |
| 296 | { |
| 297 | if (WIFSTOPPED (w)) |
| 298 | return Fcons (Qstop, Fcons (make_number (WSTOPSIG (w)), Qnil)); |
| 299 | else if (WIFEXITED (w)) |
| 300 | return Fcons (Qexit, Fcons (make_number (WRETCODE (w)), |
| 301 | WCOREDUMP (w) ? Qt : Qnil)); |
| 302 | else if (WIFSIGNALED (w)) |
| 303 | return Fcons (Qsignal, Fcons (make_number (WTERMSIG (w)), |
| 304 | WCOREDUMP (w) ? Qt : Qnil)); |
| 305 | else |
| 306 | return Qrun; |
| 307 | } |
| 308 | |
| 309 | /* Given a status-list, extract the three pieces of information |
| 310 | and store them individually through the three pointers. */ |
| 311 | |
| 312 | void |
| 313 | decode_status (l, symbol, code, coredump) |
| 314 | Lisp_Object l; |
| 315 | Lisp_Object *symbol; |
| 316 | int *code; |
| 317 | int *coredump; |
| 318 | { |
| 319 | Lisp_Object tem; |
| 320 | |
| 321 | if (SYMBOLP (l)) |
| 322 | { |
| 323 | *symbol = l; |
| 324 | *code = 0; |
| 325 | *coredump = 0; |
| 326 | } |
| 327 | else |
| 328 | { |
| 329 | *symbol = XCONS (l)->car; |
| 330 | tem = XCONS (l)->cdr; |
| 331 | *code = XFASTINT (XCONS (tem)->car); |
| 332 | tem = XCONS (tem)->cdr; |
| 333 | *coredump = !NILP (tem); |
| 334 | } |
| 335 | } |
| 336 | |
| 337 | /* Return a string describing a process status list. */ |
| 338 | |
| 339 | Lisp_Object |
| 340 | status_message (status) |
| 341 | Lisp_Object status; |
| 342 | { |
| 343 | Lisp_Object symbol; |
| 344 | int code, coredump; |
| 345 | Lisp_Object string, string2; |
| 346 | |
| 347 | decode_status (status, &symbol, &code, &coredump); |
| 348 | |
| 349 | if (EQ (symbol, Qsignal) || EQ (symbol, Qstop)) |
| 350 | { |
| 351 | char *signame = 0; |
| 352 | if (code < NSIG) |
| 353 | { |
| 354 | #ifndef VMS |
| 355 | /* Cast to suppress warning if the table has const char *. */ |
| 356 | signame = (char *) sys_siglist[code]; |
| 357 | #else |
| 358 | signame = sys_errlist[code]; |
| 359 | #endif |
| 360 | } |
| 361 | if (signame == 0) |
| 362 | signame = "unknown"; |
| 363 | string = build_string (signame); |
| 364 | string2 = build_string (coredump ? " (core dumped)\n" : "\n"); |
| 365 | XSTRING (string)->data[0] = DOWNCASE (XSTRING (string)->data[0]); |
| 366 | return concat2 (string, string2); |
| 367 | } |
| 368 | else if (EQ (symbol, Qexit)) |
| 369 | { |
| 370 | if (code == 0) |
| 371 | return build_string ("finished\n"); |
| 372 | string = Fnumber_to_string (make_number (code)); |
| 373 | string2 = build_string (coredump ? " (core dumped)\n" : "\n"); |
| 374 | return concat2 (build_string ("exited abnormally with code "), |
| 375 | concat2 (string, string2)); |
| 376 | } |
| 377 | else |
| 378 | return Fcopy_sequence (Fsymbol_name (symbol)); |
| 379 | } |
| 380 | \f |
| 381 | #ifdef HAVE_PTYS |
| 382 | |
| 383 | /* Open an available pty, returning a file descriptor. |
| 384 | Return -1 on failure. |
| 385 | The file name of the terminal corresponding to the pty |
| 386 | is left in the variable pty_name. */ |
| 387 | |
| 388 | int |
| 389 | allocate_pty () |
| 390 | { |
| 391 | struct stat stb; |
| 392 | register c, i; |
| 393 | int fd; |
| 394 | |
| 395 | /* Some systems name their pseudoterminals so that there are gaps in |
| 396 | the usual sequence - for example, on HP9000/S700 systems, there |
| 397 | are no pseudoterminals with names ending in 'f'. So we wait for |
| 398 | three failures in a row before deciding that we've reached the |
| 399 | end of the ptys. */ |
| 400 | int failed_count = 0; |
| 401 | |
| 402 | #ifdef PTY_ITERATION |
| 403 | PTY_ITERATION |
| 404 | #else |
| 405 | for (c = FIRST_PTY_LETTER; c <= 'z'; c++) |
| 406 | for (i = 0; i < 16; i++) |
| 407 | #endif |
| 408 | { |
| 409 | #ifdef PTY_NAME_SPRINTF |
| 410 | PTY_NAME_SPRINTF |
| 411 | #else |
| 412 | sprintf (pty_name, "/dev/pty%c%x", c, i); |
| 413 | #endif /* no PTY_NAME_SPRINTF */ |
| 414 | |
| 415 | #ifdef PTY_OPEN |
| 416 | PTY_OPEN; |
| 417 | #else /* no PTY_OPEN */ |
| 418 | #ifdef IRIS |
| 419 | /* Unusual IRIS code */ |
| 420 | *ptyv = open ("/dev/ptc", O_RDWR | O_NDELAY, 0); |
| 421 | if (fd < 0) |
| 422 | return -1; |
| 423 | if (fstat (fd, &stb) < 0) |
| 424 | return -1; |
| 425 | #else /* not IRIS */ |
| 426 | if (stat (pty_name, &stb) < 0) |
| 427 | { |
| 428 | failed_count++; |
| 429 | if (failed_count >= 3) |
| 430 | return -1; |
| 431 | } |
| 432 | else |
| 433 | failed_count = 0; |
| 434 | #ifdef O_NONBLOCK |
| 435 | fd = open (pty_name, O_RDWR | O_NONBLOCK, 0); |
| 436 | #else |
| 437 | fd = open (pty_name, O_RDWR | O_NDELAY, 0); |
| 438 | #endif |
| 439 | #endif /* not IRIS */ |
| 440 | #endif /* no PTY_OPEN */ |
| 441 | |
| 442 | if (fd >= 0) |
| 443 | { |
| 444 | /* check to make certain that both sides are available |
| 445 | this avoids a nasty yet stupid bug in rlogins */ |
| 446 | #ifdef PTY_TTY_NAME_SPRINTF |
| 447 | PTY_TTY_NAME_SPRINTF |
| 448 | #else |
| 449 | sprintf (pty_name, "/dev/tty%c%x", c, i); |
| 450 | #endif /* no PTY_TTY_NAME_SPRINTF */ |
| 451 | #ifndef UNIPLUS |
| 452 | if (access (pty_name, 6) != 0) |
| 453 | { |
| 454 | close (fd); |
| 455 | #if !defined(IRIS) && !defined(__sgi) |
| 456 | continue; |
| 457 | #else |
| 458 | return -1; |
| 459 | #endif /* IRIS */ |
| 460 | } |
| 461 | #endif /* not UNIPLUS */ |
| 462 | setup_pty (fd); |
| 463 | return fd; |
| 464 | } |
| 465 | } |
| 466 | return -1; |
| 467 | } |
| 468 | #endif /* HAVE_PTYS */ |
| 469 | \f |
| 470 | Lisp_Object |
| 471 | make_process (name) |
| 472 | Lisp_Object name; |
| 473 | { |
| 474 | struct Lisp_Vector *vec; |
| 475 | register Lisp_Object val, tem, name1; |
| 476 | register struct Lisp_Process *p; |
| 477 | char suffix[10]; |
| 478 | register int i; |
| 479 | |
| 480 | vec = allocate_vectorlike ((EMACS_INT) VECSIZE (struct Lisp_Process)); |
| 481 | for (i = 0; i < VECSIZE (struct Lisp_Process); i++) |
| 482 | vec->contents[i] = Qnil; |
| 483 | vec->size = VECSIZE (struct Lisp_Process); |
| 484 | p = (struct Lisp_Process *)vec; |
| 485 | |
| 486 | XSETINT (p->infd, -1); |
| 487 | XSETINT (p->outfd, -1); |
| 488 | XSETFASTINT (p->pid, 0); |
| 489 | XSETFASTINT (p->tick, 0); |
| 490 | XSETFASTINT (p->update_tick, 0); |
| 491 | p->raw_status_low = Qnil; |
| 492 | p->raw_status_high = Qnil; |
| 493 | p->status = Qrun; |
| 494 | p->mark = Fmake_marker (); |
| 495 | |
| 496 | /* If name is already in use, modify it until it is unused. */ |
| 497 | |
| 498 | name1 = name; |
| 499 | for (i = 1; ; i++) |
| 500 | { |
| 501 | tem = Fget_process (name1); |
| 502 | if (NILP (tem)) break; |
| 503 | sprintf (suffix, "<%d>", i); |
| 504 | name1 = concat2 (name, build_string (suffix)); |
| 505 | } |
| 506 | name = name1; |
| 507 | p->name = name; |
| 508 | XSETPROCESS (val, p); |
| 509 | Vprocess_alist = Fcons (Fcons (name, val), Vprocess_alist); |
| 510 | return val; |
| 511 | } |
| 512 | |
| 513 | remove_process (proc) |
| 514 | register Lisp_Object proc; |
| 515 | { |
| 516 | register Lisp_Object pair; |
| 517 | |
| 518 | pair = Frassq (proc, Vprocess_alist); |
| 519 | Vprocess_alist = Fdelq (pair, Vprocess_alist); |
| 520 | |
| 521 | deactivate_process (proc); |
| 522 | } |
| 523 | \f |
| 524 | DEFUN ("processp", Fprocessp, Sprocessp, 1, 1, 0, |
| 525 | "Return t if OBJECT is a process.") |
| 526 | (object) |
| 527 | Lisp_Object object; |
| 528 | { |
| 529 | return PROCESSP (object) ? Qt : Qnil; |
| 530 | } |
| 531 | |
| 532 | DEFUN ("get-process", Fget_process, Sget_process, 1, 1, 0, |
| 533 | "Return the process named NAME, or nil if there is none.") |
| 534 | (name) |
| 535 | register Lisp_Object name; |
| 536 | { |
| 537 | if (PROCESSP (name)) |
| 538 | return name; |
| 539 | CHECK_STRING (name, 0); |
| 540 | return Fcdr (Fassoc (name, Vprocess_alist)); |
| 541 | } |
| 542 | |
| 543 | DEFUN ("get-buffer-process", Fget_buffer_process, Sget_buffer_process, 1, 1, 0, |
| 544 | "Return the (or, a) process associated with BUFFER.\n\ |
| 545 | BUFFER may be a buffer or the name of one.") |
| 546 | (buffer) |
| 547 | register Lisp_Object buffer; |
| 548 | { |
| 549 | register Lisp_Object buf, tail, proc; |
| 550 | |
| 551 | if (NILP (buffer)) return Qnil; |
| 552 | buf = Fget_buffer (buffer); |
| 553 | if (NILP (buf)) return Qnil; |
| 554 | |
| 555 | for (tail = Vprocess_alist; !NILP (tail); tail = Fcdr (tail)) |
| 556 | { |
| 557 | proc = Fcdr (Fcar (tail)); |
| 558 | if (PROCESSP (proc) && EQ (XPROCESS (proc)->buffer, buf)) |
| 559 | return proc; |
| 560 | } |
| 561 | return Qnil; |
| 562 | } |
| 563 | |
| 564 | /* This is how commands for the user decode process arguments. It |
| 565 | accepts a process, a process name, a buffer, a buffer name, or nil. |
| 566 | Buffers denote the first process in the buffer, and nil denotes the |
| 567 | current buffer. */ |
| 568 | |
| 569 | static Lisp_Object |
| 570 | get_process (name) |
| 571 | register Lisp_Object name; |
| 572 | { |
| 573 | register Lisp_Object proc, obj; |
| 574 | if (STRINGP (name)) |
| 575 | { |
| 576 | obj = Fget_process (name); |
| 577 | if (NILP (obj)) |
| 578 | obj = Fget_buffer (name); |
| 579 | if (NILP (obj)) |
| 580 | error ("Process %s does not exist", XSTRING (name)->data); |
| 581 | } |
| 582 | else if (NILP (name)) |
| 583 | obj = Fcurrent_buffer (); |
| 584 | else |
| 585 | obj = name; |
| 586 | |
| 587 | /* Now obj should be either a buffer object or a process object. |
| 588 | */ |
| 589 | if (BUFFERP (obj)) |
| 590 | { |
| 591 | proc = Fget_buffer_process (obj); |
| 592 | if (NILP (proc)) |
| 593 | error ("Buffer %s has no process", XSTRING (XBUFFER (obj)->name)->data); |
| 594 | } |
| 595 | else |
| 596 | { |
| 597 | CHECK_PROCESS (obj, 0); |
| 598 | proc = obj; |
| 599 | } |
| 600 | return proc; |
| 601 | } |
| 602 | |
| 603 | DEFUN ("delete-process", Fdelete_process, Sdelete_process, 1, 1, 0, |
| 604 | "Delete PROCESS: kill it and forget about it immediately.\n\ |
| 605 | PROCESS may be a process, a buffer, the name of a process or buffer, or\n\ |
| 606 | nil, indicating the current buffer's process.") |
| 607 | (process) |
| 608 | register Lisp_Object process; |
| 609 | { |
| 610 | process = get_process (process); |
| 611 | XPROCESS (process)->raw_status_low = Qnil; |
| 612 | XPROCESS (process)->raw_status_high = Qnil; |
| 613 | if (NETCONN_P (process)) |
| 614 | { |
| 615 | XPROCESS (process)->status = Fcons (Qexit, Fcons (make_number (0), Qnil)); |
| 616 | XSETINT (XPROCESS (process)->tick, ++process_tick); |
| 617 | } |
| 618 | else if (XINT (XPROCESS (process)->infd) >= 0) |
| 619 | { |
| 620 | Fkill_process (process, Qnil); |
| 621 | /* Do this now, since remove_process will make sigchld_handler do nothing. */ |
| 622 | XPROCESS (process)->status |
| 623 | = Fcons (Qsignal, Fcons (make_number (SIGKILL), Qnil)); |
| 624 | XSETINT (XPROCESS (process)->tick, ++process_tick); |
| 625 | status_notify (); |
| 626 | } |
| 627 | remove_process (process); |
| 628 | return Qnil; |
| 629 | } |
| 630 | \f |
| 631 | DEFUN ("process-status", Fprocess_status, Sprocess_status, 1, 1, 0, |
| 632 | "Return the status of PROCESS: a symbol, one of these:\n\ |
| 633 | run -- for a process that is running.\n\ |
| 634 | stop -- for a process stopped but continuable.\n\ |
| 635 | exit -- for a process that has exited.\n\ |
| 636 | signal -- for a process that has got a fatal signal.\n\ |
| 637 | open -- for a network stream connection that is open.\n\ |
| 638 | closed -- for a network stream connection that is closed.\n\ |
| 639 | nil -- if arg is a process name and no such process exists.\n\ |
| 640 | PROCESS may be a process, a buffer, the name of a process or buffer, or\n\ |
| 641 | nil, indicating the current buffer's process.") |
| 642 | (process) |
| 643 | register Lisp_Object process; |
| 644 | { |
| 645 | register struct Lisp_Process *p; |
| 646 | register Lisp_Object status; |
| 647 | |
| 648 | if (STRINGP (process)) |
| 649 | process = Fget_process (process); |
| 650 | else |
| 651 | process = get_process (process); |
| 652 | |
| 653 | if (NILP (process)) |
| 654 | return process; |
| 655 | |
| 656 | p = XPROCESS (process); |
| 657 | if (!NILP (p->raw_status_low)) |
| 658 | update_status (p); |
| 659 | status = p->status; |
| 660 | if (CONSP (status)) |
| 661 | status = XCONS (status)->car; |
| 662 | if (NETCONN_P (process)) |
| 663 | { |
| 664 | if (EQ (status, Qrun)) |
| 665 | status = Qopen; |
| 666 | else if (EQ (status, Qexit)) |
| 667 | status = Qclosed; |
| 668 | } |
| 669 | return status; |
| 670 | } |
| 671 | |
| 672 | DEFUN ("process-exit-status", Fprocess_exit_status, Sprocess_exit_status, |
| 673 | 1, 1, 0, |
| 674 | "Return the exit status of PROCESS or the signal number that killed it.\n\ |
| 675 | If PROCESS has not yet exited or died, return 0.") |
| 676 | (process) |
| 677 | register Lisp_Object process; |
| 678 | { |
| 679 | CHECK_PROCESS (process, 0); |
| 680 | if (!NILP (XPROCESS (process)->raw_status_low)) |
| 681 | update_status (XPROCESS (process)); |
| 682 | if (CONSP (XPROCESS (process)->status)) |
| 683 | return XCONS (XCONS (XPROCESS (process)->status)->cdr)->car; |
| 684 | return make_number (0); |
| 685 | } |
| 686 | |
| 687 | DEFUN ("process-id", Fprocess_id, Sprocess_id, 1, 1, 0, |
| 688 | "Return the process id of PROCESS.\n\ |
| 689 | This is the pid of the Unix process which PROCESS uses or talks to.\n\ |
| 690 | For a network connection, this value is nil.") |
| 691 | (process) |
| 692 | register Lisp_Object process; |
| 693 | { |
| 694 | CHECK_PROCESS (process, 0); |
| 695 | return XPROCESS (process)->pid; |
| 696 | } |
| 697 | |
| 698 | DEFUN ("process-name", Fprocess_name, Sprocess_name, 1, 1, 0, |
| 699 | "Return the name of PROCESS, as a string.\n\ |
| 700 | This is the name of the program invoked in PROCESS,\n\ |
| 701 | possibly modified to make it unique among process names.") |
| 702 | (process) |
| 703 | register Lisp_Object process; |
| 704 | { |
| 705 | CHECK_PROCESS (process, 0); |
| 706 | return XPROCESS (process)->name; |
| 707 | } |
| 708 | |
| 709 | DEFUN ("process-command", Fprocess_command, Sprocess_command, 1, 1, 0, |
| 710 | "Return the command that was executed to start PROCESS.\n\ |
| 711 | This is a list of strings, the first string being the program executed\n\ |
| 712 | and the rest of the strings being the arguments given to it.\n\ |
| 713 | For a non-child channel, this is nil.") |
| 714 | (process) |
| 715 | register Lisp_Object process; |
| 716 | { |
| 717 | CHECK_PROCESS (process, 0); |
| 718 | return XPROCESS (process)->command; |
| 719 | } |
| 720 | |
| 721 | DEFUN ("process-tty-name", Fprocess_tty_name, Sprocess_tty_name, 1, 1, 0, |
| 722 | "Return the name of the terminal PROCESS uses, or nil if none.\n\ |
| 723 | This is the terminal that the process itself reads and writes on,\n\ |
| 724 | not the name of the pty that Emacs uses to talk with that terminal.") |
| 725 | (process) |
| 726 | register Lisp_Object process; |
| 727 | { |
| 728 | CHECK_PROCESS (process, 0); |
| 729 | return XPROCESS (process)->tty_name; |
| 730 | } |
| 731 | |
| 732 | DEFUN ("set-process-buffer", Fset_process_buffer, Sset_process_buffer, |
| 733 | 2, 2, 0, |
| 734 | "Set buffer associated with PROCESS to BUFFER (a buffer, or nil).") |
| 735 | (process, buffer) |
| 736 | register Lisp_Object process, buffer; |
| 737 | { |
| 738 | CHECK_PROCESS (process, 0); |
| 739 | if (!NILP (buffer)) |
| 740 | CHECK_BUFFER (buffer, 1); |
| 741 | XPROCESS (process)->buffer = buffer; |
| 742 | return buffer; |
| 743 | } |
| 744 | |
| 745 | DEFUN ("process-buffer", Fprocess_buffer, Sprocess_buffer, |
| 746 | 1, 1, 0, |
| 747 | "Return the buffer PROCESS is associated with.\n\ |
| 748 | Output from PROCESS is inserted in this buffer\n\ |
| 749 | unless PROCESS has a filter.") |
| 750 | (process) |
| 751 | register Lisp_Object process; |
| 752 | { |
| 753 | CHECK_PROCESS (process, 0); |
| 754 | return XPROCESS (process)->buffer; |
| 755 | } |
| 756 | |
| 757 | DEFUN ("process-mark", Fprocess_mark, Sprocess_mark, |
| 758 | 1, 1, 0, |
| 759 | "Return the marker for the end of the last output from PROCESS.") |
| 760 | (process) |
| 761 | register Lisp_Object process; |
| 762 | { |
| 763 | CHECK_PROCESS (process, 0); |
| 764 | return XPROCESS (process)->mark; |
| 765 | } |
| 766 | |
| 767 | DEFUN ("set-process-filter", Fset_process_filter, Sset_process_filter, |
| 768 | 2, 2, 0, |
| 769 | "Give PROCESS the filter function FILTER; nil means no filter.\n\ |
| 770 | t means stop accepting output from the process.\n\ |
| 771 | When a process has a filter, each time it does output\n\ |
| 772 | the entire string of output is passed to the filter.\n\ |
| 773 | The filter gets two arguments: the process and the string of output.\n\ |
| 774 | If the process has a filter, its buffer is not used for output.") |
| 775 | (process, filter) |
| 776 | register Lisp_Object process, filter; |
| 777 | { |
| 778 | CHECK_PROCESS (process, 0); |
| 779 | if (EQ (filter, Qt)) |
| 780 | { |
| 781 | FD_CLR (XINT (XPROCESS (process)->infd), &input_wait_mask); |
| 782 | FD_CLR (XINT (XPROCESS (process)->infd), &non_keyboard_wait_mask); |
| 783 | } |
| 784 | else if (EQ (XPROCESS (process)->filter, Qt)) |
| 785 | { |
| 786 | FD_SET (XINT (XPROCESS (process)->infd), &input_wait_mask); |
| 787 | FD_SET (XINT (XPROCESS (process)->infd), &non_keyboard_wait_mask); |
| 788 | } |
| 789 | XPROCESS (process)->filter = filter; |
| 790 | return filter; |
| 791 | } |
| 792 | |
| 793 | DEFUN ("process-filter", Fprocess_filter, Sprocess_filter, |
| 794 | 1, 1, 0, |
| 795 | "Returns the filter function of PROCESS; nil if none.\n\ |
| 796 | See `set-process-filter' for more info on filter functions.") |
| 797 | (process) |
| 798 | register Lisp_Object process; |
| 799 | { |
| 800 | CHECK_PROCESS (process, 0); |
| 801 | return XPROCESS (process)->filter; |
| 802 | } |
| 803 | |
| 804 | DEFUN ("set-process-sentinel", Fset_process_sentinel, Sset_process_sentinel, |
| 805 | 2, 2, 0, |
| 806 | "Give PROCESS the sentinel SENTINEL; nil for none.\n\ |
| 807 | The sentinel is called as a function when the process changes state.\n\ |
| 808 | It gets two arguments: the process, and a string describing the change.") |
| 809 | (process, sentinel) |
| 810 | register Lisp_Object process, sentinel; |
| 811 | { |
| 812 | CHECK_PROCESS (process, 0); |
| 813 | XPROCESS (process)->sentinel = sentinel; |
| 814 | return sentinel; |
| 815 | } |
| 816 | |
| 817 | DEFUN ("process-sentinel", Fprocess_sentinel, Sprocess_sentinel, |
| 818 | 1, 1, 0, |
| 819 | "Return the sentinel of PROCESS; nil if none.\n\ |
| 820 | See `set-process-sentinel' for more info on sentinels.") |
| 821 | (process) |
| 822 | register Lisp_Object process; |
| 823 | { |
| 824 | CHECK_PROCESS (process, 0); |
| 825 | return XPROCESS (process)->sentinel; |
| 826 | } |
| 827 | |
| 828 | DEFUN ("set-process-window-size", Fset_process_window_size, |
| 829 | Sset_process_window_size, 3, 3, 0, |
| 830 | "Tell PROCESS that it has logical window size HEIGHT and WIDTH.") |
| 831 | (process, height, width) |
| 832 | register Lisp_Object process, height, width; |
| 833 | { |
| 834 | CHECK_PROCESS (process, 0); |
| 835 | CHECK_NATNUM (height, 0); |
| 836 | CHECK_NATNUM (width, 0); |
| 837 | if (set_window_size (XINT (XPROCESS (process)->infd), |
| 838 | XINT (height), XINT(width)) <= 0) |
| 839 | return Qnil; |
| 840 | else |
| 841 | return Qt; |
| 842 | } |
| 843 | |
| 844 | DEFUN ("process-kill-without-query", Fprocess_kill_without_query, |
| 845 | Sprocess_kill_without_query, 1, 2, 0, |
| 846 | "Say no query needed if PROCESS is running when Emacs is exited.\n\ |
| 847 | Optional second argument if non-nil says to require a query.\n\ |
| 848 | Value is t if a query was formerly required.") |
| 849 | (process, value) |
| 850 | register Lisp_Object process, value; |
| 851 | { |
| 852 | Lisp_Object tem; |
| 853 | |
| 854 | CHECK_PROCESS (process, 0); |
| 855 | tem = XPROCESS (process)->kill_without_query; |
| 856 | XPROCESS (process)->kill_without_query = Fnull (value); |
| 857 | |
| 858 | return Fnull (tem); |
| 859 | } |
| 860 | |
| 861 | DEFUN ("process-contact", Fprocess_contact, Sprocess_contact, |
| 862 | 1, 1, 0, |
| 863 | "Return the contact info of PROCESS; t for a real child.\n\ |
| 864 | For a net connection, the value is a cons cell of the form (HOST SERVICE).") |
| 865 | (process) |
| 866 | register Lisp_Object process; |
| 867 | { |
| 868 | CHECK_PROCESS (process, 0); |
| 869 | return XPROCESS (process)->childp; |
| 870 | } |
| 871 | |
| 872 | #if 0 /* Turned off because we don't currently record this info |
| 873 | in the process. Perhaps add it. */ |
| 874 | DEFUN ("process-connection", Fprocess_connection, Sprocess_connection, 1, 1, 0, |
| 875 | "Return the connection type of `PROCESS'.\n\ |
| 876 | The value is `nil' for a pipe,\n\ |
| 877 | `t' or `pty' for a pty, or `stream' for a socket connection.") |
| 878 | (process) |
| 879 | Lisp_Object process; |
| 880 | { |
| 881 | return XPROCESS (process)->type; |
| 882 | } |
| 883 | #endif |
| 884 | \f |
| 885 | Lisp_Object |
| 886 | list_processes_1 () |
| 887 | { |
| 888 | register Lisp_Object tail, tem; |
| 889 | Lisp_Object proc, minspace, tem1; |
| 890 | register struct buffer *old = current_buffer; |
| 891 | register struct Lisp_Process *p; |
| 892 | register int state; |
| 893 | char tembuf[80]; |
| 894 | |
| 895 | XSETFASTINT (minspace, 1); |
| 896 | |
| 897 | set_buffer_internal (XBUFFER (Vstandard_output)); |
| 898 | Fbuffer_disable_undo (Vstandard_output); |
| 899 | |
| 900 | current_buffer->truncate_lines = Qt; |
| 901 | |
| 902 | write_string ("\ |
| 903 | Proc Status Buffer Tty Command\n\ |
| 904 | ---- ------ ------ --- -------\n", -1); |
| 905 | |
| 906 | for (tail = Vprocess_alist; !NILP (tail); tail = Fcdr (tail)) |
| 907 | { |
| 908 | Lisp_Object symbol; |
| 909 | |
| 910 | proc = Fcdr (Fcar (tail)); |
| 911 | p = XPROCESS (proc); |
| 912 | if (NILP (p->childp)) |
| 913 | continue; |
| 914 | |
| 915 | Finsert (1, &p->name); |
| 916 | Findent_to (make_number (13), minspace); |
| 917 | |
| 918 | if (!NILP (p->raw_status_low)) |
| 919 | update_status (p); |
| 920 | symbol = p->status; |
| 921 | if (CONSP (p->status)) |
| 922 | symbol = XCONS (p->status)->car; |
| 923 | |
| 924 | |
| 925 | if (EQ (symbol, Qsignal)) |
| 926 | { |
| 927 | Lisp_Object tem; |
| 928 | tem = Fcar (Fcdr (p->status)); |
| 929 | #ifdef VMS |
| 930 | if (XINT (tem) < NSIG) |
| 931 | write_string (sys_errlist [XINT (tem)], -1); |
| 932 | else |
| 933 | #endif |
| 934 | Fprinc (symbol, Qnil); |
| 935 | } |
| 936 | else if (NETCONN_P (proc)) |
| 937 | { |
| 938 | if (EQ (symbol, Qrun)) |
| 939 | write_string ("open", -1); |
| 940 | else if (EQ (symbol, Qexit)) |
| 941 | write_string ("closed", -1); |
| 942 | else |
| 943 | Fprinc (symbol, Qnil); |
| 944 | } |
| 945 | else |
| 946 | Fprinc (symbol, Qnil); |
| 947 | |
| 948 | if (EQ (symbol, Qexit)) |
| 949 | { |
| 950 | Lisp_Object tem; |
| 951 | tem = Fcar (Fcdr (p->status)); |
| 952 | if (XFASTINT (tem)) |
| 953 | { |
| 954 | sprintf (tembuf, " %d", (int) XFASTINT (tem)); |
| 955 | write_string (tembuf, -1); |
| 956 | } |
| 957 | } |
| 958 | |
| 959 | if (EQ (symbol, Qsignal) || EQ (symbol, Qexit)) |
| 960 | remove_process (proc); |
| 961 | |
| 962 | Findent_to (make_number (22), minspace); |
| 963 | if (NILP (p->buffer)) |
| 964 | insert_string ("(none)"); |
| 965 | else if (NILP (XBUFFER (p->buffer)->name)) |
| 966 | insert_string ("(Killed)"); |
| 967 | else |
| 968 | Finsert (1, &XBUFFER (p->buffer)->name); |
| 969 | |
| 970 | Findent_to (make_number (37), minspace); |
| 971 | |
| 972 | if (STRINGP (p->tty_name)) |
| 973 | Finsert (1, &p->tty_name); |
| 974 | else |
| 975 | insert_string ("(none)"); |
| 976 | |
| 977 | Findent_to (make_number (49), minspace); |
| 978 | |
| 979 | if (NETCONN_P (proc)) |
| 980 | { |
| 981 | sprintf (tembuf, "(network stream connection to %s)\n", |
| 982 | XSTRING (XCONS (p->childp)->car)->data); |
| 983 | insert_string (tembuf); |
| 984 | } |
| 985 | else |
| 986 | { |
| 987 | tem = p->command; |
| 988 | while (1) |
| 989 | { |
| 990 | tem1 = Fcar (tem); |
| 991 | Finsert (1, &tem1); |
| 992 | tem = Fcdr (tem); |
| 993 | if (NILP (tem)) |
| 994 | break; |
| 995 | insert_string (" "); |
| 996 | } |
| 997 | insert_string ("\n"); |
| 998 | } |
| 999 | } |
| 1000 | return Qnil; |
| 1001 | } |
| 1002 | |
| 1003 | DEFUN ("list-processes", Flist_processes, Slist_processes, 0, 0, "", |
| 1004 | "Display a list of all processes.\n\ |
| 1005 | \(Any processes listed as Exited or Signaled are actually eliminated\n\ |
| 1006 | after the listing is made.)") |
| 1007 | () |
| 1008 | { |
| 1009 | internal_with_output_to_temp_buffer ("*Process List*", |
| 1010 | list_processes_1, Qnil); |
| 1011 | return Qnil; |
| 1012 | } |
| 1013 | |
| 1014 | DEFUN ("process-list", Fprocess_list, Sprocess_list, 0, 0, 0, |
| 1015 | "Return a list of all processes.") |
| 1016 | () |
| 1017 | { |
| 1018 | return Fmapcar (Qcdr, Vprocess_alist); |
| 1019 | } |
| 1020 | \f |
| 1021 | /* Starting asynchronous inferior processes. */ |
| 1022 | |
| 1023 | static Lisp_Object start_process_unwind (); |
| 1024 | |
| 1025 | DEFUN ("start-process", Fstart_process, Sstart_process, 3, MANY, 0, |
| 1026 | "Start a program in a subprocess. Return the process object for it.\n\ |
| 1027 | Args are NAME BUFFER PROGRAM &rest PROGRAM-ARGS\n\ |
| 1028 | NAME is name for process. It is modified if necessary to make it unique.\n\ |
| 1029 | BUFFER is the buffer or (buffer-name) to associate with the process.\n\ |
| 1030 | Process output goes at end of that buffer, unless you specify\n\ |
| 1031 | an output stream or filter function to handle the output.\n\ |
| 1032 | BUFFER may be also nil, meaning that this process is not associated\n\ |
| 1033 | with any buffer.\n\ |
| 1034 | Third arg is program file name. It is searched for as in the shell.\n\ |
| 1035 | Remaining arguments are strings to give program as arguments.") |
| 1036 | (nargs, args) |
| 1037 | int nargs; |
| 1038 | register Lisp_Object *args; |
| 1039 | { |
| 1040 | Lisp_Object buffer, name, program, proc, current_dir, tem; |
| 1041 | #ifdef VMS |
| 1042 | register unsigned char *new_argv; |
| 1043 | int len; |
| 1044 | #else |
| 1045 | register unsigned char **new_argv; |
| 1046 | #endif |
| 1047 | register int i; |
| 1048 | int count = specpdl_ptr - specpdl; |
| 1049 | |
| 1050 | buffer = args[1]; |
| 1051 | if (!NILP (buffer)) |
| 1052 | buffer = Fget_buffer_create (buffer); |
| 1053 | |
| 1054 | /* Make sure that the child will be able to chdir to the current |
| 1055 | buffer's current directory, or its unhandled equivalent. We |
| 1056 | can't just have the child check for an error when it does the |
| 1057 | chdir, since it's in a vfork. |
| 1058 | |
| 1059 | We have to GCPRO around this because Fexpand_file_name and |
| 1060 | Funhandled_file_name_directory might call a file name handling |
| 1061 | function. The argument list is protected by the caller, so all |
| 1062 | we really have to worry about is buffer. */ |
| 1063 | { |
| 1064 | struct gcpro gcpro1, gcpro2; |
| 1065 | |
| 1066 | current_dir = current_buffer->directory; |
| 1067 | |
| 1068 | GCPRO2 (buffer, current_dir); |
| 1069 | |
| 1070 | current_dir |
| 1071 | = expand_and_dir_to_file (Funhandled_file_name_directory (current_dir), |
| 1072 | Qnil); |
| 1073 | if (NILP (Ffile_accessible_directory_p (current_dir))) |
| 1074 | report_file_error ("Setting current directory", |
| 1075 | Fcons (current_buffer->directory, Qnil)); |
| 1076 | |
| 1077 | UNGCPRO; |
| 1078 | } |
| 1079 | |
| 1080 | name = args[0]; |
| 1081 | CHECK_STRING (name, 0); |
| 1082 | |
| 1083 | program = args[2]; |
| 1084 | |
| 1085 | CHECK_STRING (program, 2); |
| 1086 | |
| 1087 | #ifdef VMS |
| 1088 | /* Make a one member argv with all args concatenated |
| 1089 | together separated by a blank. */ |
| 1090 | len = XSTRING (program)->size + 2; |
| 1091 | for (i = 3; i < nargs; i++) |
| 1092 | { |
| 1093 | tem = args[i]; |
| 1094 | CHECK_STRING (tem, i); |
| 1095 | len += XSTRING (tem)->size + 1; /* count the blank */ |
| 1096 | } |
| 1097 | new_argv = (unsigned char *) alloca (len); |
| 1098 | strcpy (new_argv, XSTRING (program)->data); |
| 1099 | for (i = 3; i < nargs; i++) |
| 1100 | { |
| 1101 | tem = args[i]; |
| 1102 | CHECK_STRING (tem, i); |
| 1103 | strcat (new_argv, " "); |
| 1104 | strcat (new_argv, XSTRING (tem)->data); |
| 1105 | } |
| 1106 | /* Need to add code here to check for program existence on VMS */ |
| 1107 | |
| 1108 | #else /* not VMS */ |
| 1109 | new_argv = (unsigned char **) alloca ((nargs - 1) * sizeof (char *)); |
| 1110 | |
| 1111 | /* If program file name is not absolute, search our path for it */ |
| 1112 | if (!IS_DIRECTORY_SEP (XSTRING (program)->data[0]) |
| 1113 | && !(XSTRING (program)->size > 1 |
| 1114 | && IS_DEVICE_SEP (XSTRING (program)->data[1]))) |
| 1115 | { |
| 1116 | struct gcpro gcpro1, gcpro2, gcpro3, gcpro4; |
| 1117 | |
| 1118 | tem = Qnil; |
| 1119 | GCPRO4 (name, program, buffer, current_dir); |
| 1120 | openp (Vexec_path, program, EXEC_SUFFIXES, &tem, 1); |
| 1121 | UNGCPRO; |
| 1122 | if (NILP (tem)) |
| 1123 | report_file_error ("Searching for program", Fcons (program, Qnil)); |
| 1124 | tem = Fexpand_file_name (tem, Qnil); |
| 1125 | new_argv[0] = XSTRING (tem)->data; |
| 1126 | } |
| 1127 | else |
| 1128 | { |
| 1129 | if (!NILP (Ffile_directory_p (program))) |
| 1130 | error ("Specified program for new process is a directory"); |
| 1131 | |
| 1132 | new_argv[0] = XSTRING (program)->data; |
| 1133 | } |
| 1134 | |
| 1135 | for (i = 3; i < nargs; i++) |
| 1136 | { |
| 1137 | tem = args[i]; |
| 1138 | CHECK_STRING (tem, i); |
| 1139 | new_argv[i - 2] = XSTRING (tem)->data; |
| 1140 | } |
| 1141 | new_argv[i - 2] = 0; |
| 1142 | #endif /* not VMS */ |
| 1143 | |
| 1144 | proc = make_process (name); |
| 1145 | /* If an error occurs and we can't start the process, we want to |
| 1146 | remove it from the process list. This means that each error |
| 1147 | check in create_process doesn't need to call remove_process |
| 1148 | itself; it's all taken care of here. */ |
| 1149 | record_unwind_protect (start_process_unwind, proc); |
| 1150 | |
| 1151 | XPROCESS (proc)->childp = Qt; |
| 1152 | XPROCESS (proc)->command_channel_p = Qnil; |
| 1153 | XPROCESS (proc)->buffer = buffer; |
| 1154 | XPROCESS (proc)->sentinel = Qnil; |
| 1155 | XPROCESS (proc)->filter = Qnil; |
| 1156 | XPROCESS (proc)->command = Flist (nargs - 2, args + 2); |
| 1157 | |
| 1158 | /* Make the process marker point into the process buffer (if any). */ |
| 1159 | if (!NILP (buffer)) |
| 1160 | Fset_marker (XPROCESS (proc)->mark, |
| 1161 | make_number (BUF_ZV (XBUFFER (buffer))), buffer); |
| 1162 | |
| 1163 | if (!NILP (buffer) && NILP (XBUFFER (buffer)->enable_multibyte_characters) |
| 1164 | || NILP (buffer) && NILP (buffer_defaults.enable_multibyte_characters)) |
| 1165 | { |
| 1166 | XPROCESS (proc)->decode_coding_system = Qnil; |
| 1167 | XPROCESS (proc)->encode_coding_system = Qnil; |
| 1168 | } |
| 1169 | else |
| 1170 | { |
| 1171 | /* Setup coding systems for communicating with the process. */ |
| 1172 | /* Qt denotes we have not yet called Ffind_operation_coding_system. */ |
| 1173 | Lisp_Object coding_systems = Qt; |
| 1174 | Lisp_Object val, *args2; |
| 1175 | struct gcpro gcpro1; |
| 1176 | |
| 1177 | if (!NILP (Vcoding_system_for_read)) |
| 1178 | val = Vcoding_system_for_read; |
| 1179 | else if (NILP (current_buffer->enable_multibyte_characters)) |
| 1180 | val = Qemacs_mule; |
| 1181 | else |
| 1182 | { |
| 1183 | args2 = (Lisp_Object *) alloca ((nargs + 1) * sizeof *args2); |
| 1184 | args2[0] = Qstart_process; |
| 1185 | for (i = 0; i < nargs; i++) args2[i + 1] = args[i]; |
| 1186 | GCPRO1 (proc); |
| 1187 | coding_systems = Ffind_operation_coding_system (nargs + 1, args2); |
| 1188 | UNGCPRO; |
| 1189 | if (CONSP (coding_systems)) |
| 1190 | val = XCONS (coding_systems)->car; |
| 1191 | else if (CONSP (Vdefault_process_coding_system)) |
| 1192 | val = XCONS (Vdefault_process_coding_system)->car; |
| 1193 | else |
| 1194 | val = Qnil; |
| 1195 | } |
| 1196 | XPROCESS (proc)->decode_coding_system = val; |
| 1197 | |
| 1198 | if (!NILP (Vcoding_system_for_write)) |
| 1199 | val = Vcoding_system_for_write; |
| 1200 | else if (NILP (current_buffer->enable_multibyte_characters)) |
| 1201 | val = Qnil; |
| 1202 | else |
| 1203 | { |
| 1204 | if (EQ (coding_systems, Qt)) |
| 1205 | { |
| 1206 | args2 = (Lisp_Object *) alloca ((nargs + 1) * sizeof args2); |
| 1207 | args2[0] = Qstart_process; |
| 1208 | for (i = 0; i < nargs; i++) args2[i + 1] = args[i]; |
| 1209 | GCPRO1 (proc); |
| 1210 | coding_systems = |
| 1211 | Ffind_operation_coding_system (nargs + 1, args2); |
| 1212 | UNGCPRO; |
| 1213 | } |
| 1214 | if (CONSP (coding_systems)) |
| 1215 | val = XCONS (coding_systems)->cdr; |
| 1216 | else if (CONSP (Vdefault_process_coding_system)) |
| 1217 | val = XCONS (Vdefault_process_coding_system)->cdr; |
| 1218 | else |
| 1219 | val = Qnil; |
| 1220 | } |
| 1221 | XPROCESS (proc)->encode_coding_system = val; |
| 1222 | } |
| 1223 | |
| 1224 | XPROCESS (proc)->decoding_buf = make_uninit_string (0); |
| 1225 | XPROCESS (proc)->encoding_buf = make_uninit_string (0); |
| 1226 | |
| 1227 | create_process (proc, new_argv, current_dir); |
| 1228 | |
| 1229 | return unbind_to (count, proc); |
| 1230 | } |
| 1231 | |
| 1232 | /* This function is the unwind_protect form for Fstart_process. If |
| 1233 | PROC doesn't have its pid set, then we know someone has signaled |
| 1234 | an error and the process wasn't started successfully, so we should |
| 1235 | remove it from the process list. */ |
| 1236 | static Lisp_Object |
| 1237 | start_process_unwind (proc) |
| 1238 | Lisp_Object proc; |
| 1239 | { |
| 1240 | if (!PROCESSP (proc)) |
| 1241 | abort (); |
| 1242 | |
| 1243 | /* Was PROC started successfully? */ |
| 1244 | if (XINT (XPROCESS (proc)->pid) <= 0) |
| 1245 | remove_process (proc); |
| 1246 | |
| 1247 | return Qnil; |
| 1248 | } |
| 1249 | |
| 1250 | |
| 1251 | SIGTYPE |
| 1252 | create_process_1 (signo) |
| 1253 | int signo; |
| 1254 | { |
| 1255 | #if defined (USG) && !defined (POSIX_SIGNALS) |
| 1256 | /* USG systems forget handlers when they are used; |
| 1257 | must reestablish each time */ |
| 1258 | signal (signo, create_process_1); |
| 1259 | #endif /* USG */ |
| 1260 | } |
| 1261 | |
| 1262 | #if 0 /* This doesn't work; see the note before sigchld_handler. */ |
| 1263 | #ifdef USG |
| 1264 | #ifdef SIGCHLD |
| 1265 | /* Mimic blocking of signals on system V, which doesn't really have it. */ |
| 1266 | |
| 1267 | /* Nonzero means we got a SIGCHLD when it was supposed to be blocked. */ |
| 1268 | int sigchld_deferred; |
| 1269 | |
| 1270 | SIGTYPE |
| 1271 | create_process_sigchld () |
| 1272 | { |
| 1273 | signal (SIGCHLD, create_process_sigchld); |
| 1274 | |
| 1275 | sigchld_deferred = 1; |
| 1276 | } |
| 1277 | #endif |
| 1278 | #endif |
| 1279 | #endif |
| 1280 | |
| 1281 | #ifndef VMS /* VMS version of this function is in vmsproc.c. */ |
| 1282 | create_process (process, new_argv, current_dir) |
| 1283 | Lisp_Object process; |
| 1284 | char **new_argv; |
| 1285 | Lisp_Object current_dir; |
| 1286 | { |
| 1287 | int pid, inchannel, outchannel; |
| 1288 | int sv[2]; |
| 1289 | #ifdef POSIX_SIGNALS |
| 1290 | sigset_t procmask; |
| 1291 | sigset_t blocked; |
| 1292 | struct sigaction sigint_action; |
| 1293 | struct sigaction sigquit_action; |
| 1294 | #ifdef AIX |
| 1295 | struct sigaction sighup_action; |
| 1296 | #endif |
| 1297 | #else /* !POSIX_SIGNALS */ |
| 1298 | #ifdef SIGCHLD |
| 1299 | SIGTYPE (*sigchld)(); |
| 1300 | #endif |
| 1301 | #endif /* !POSIX_SIGNALS */ |
| 1302 | /* Use volatile to protect variables from being clobbered by longjmp. */ |
| 1303 | volatile int forkin, forkout; |
| 1304 | volatile int pty_flag = 0; |
| 1305 | extern char **environ; |
| 1306 | |
| 1307 | inchannel = outchannel = -1; |
| 1308 | |
| 1309 | #ifdef HAVE_PTYS |
| 1310 | if (!NILP (Vprocess_connection_type)) |
| 1311 | outchannel = inchannel = allocate_pty (); |
| 1312 | |
| 1313 | if (inchannel >= 0) |
| 1314 | { |
| 1315 | #ifndef USG |
| 1316 | /* On USG systems it does not work to open the pty's tty here |
| 1317 | and then close and reopen it in the child. */ |
| 1318 | #ifdef O_NOCTTY |
| 1319 | /* Don't let this terminal become our controlling terminal |
| 1320 | (in case we don't have one). */ |
| 1321 | forkout = forkin = open (pty_name, O_RDWR | O_NOCTTY, 0); |
| 1322 | #else |
| 1323 | forkout = forkin = open (pty_name, O_RDWR, 0); |
| 1324 | #endif |
| 1325 | if (forkin < 0) |
| 1326 | report_file_error ("Opening pty", Qnil); |
| 1327 | #else |
| 1328 | forkin = forkout = -1; |
| 1329 | #endif /* not USG */ |
| 1330 | pty_flag = 1; |
| 1331 | } |
| 1332 | else |
| 1333 | #endif /* HAVE_PTYS */ |
| 1334 | #ifdef SKTPAIR |
| 1335 | { |
| 1336 | if (socketpair (AF_UNIX, SOCK_STREAM, 0, sv) < 0) |
| 1337 | report_file_error ("Opening socketpair", Qnil); |
| 1338 | outchannel = inchannel = sv[0]; |
| 1339 | forkout = forkin = sv[1]; |
| 1340 | } |
| 1341 | #else /* not SKTPAIR */ |
| 1342 | { |
| 1343 | pipe (sv); |
| 1344 | inchannel = sv[0]; |
| 1345 | forkout = sv[1]; |
| 1346 | pipe (sv); |
| 1347 | outchannel = sv[1]; |
| 1348 | forkin = sv[0]; |
| 1349 | } |
| 1350 | #endif /* not SKTPAIR */ |
| 1351 | |
| 1352 | #if 0 |
| 1353 | /* Replaced by close_process_descs */ |
| 1354 | set_exclusive_use (inchannel); |
| 1355 | set_exclusive_use (outchannel); |
| 1356 | #endif |
| 1357 | |
| 1358 | /* Stride people say it's a mystery why this is needed |
| 1359 | as well as the O_NDELAY, but that it fails without this. */ |
| 1360 | #if defined (STRIDE) || (defined (pfa) && defined (HAVE_PTYS)) |
| 1361 | { |
| 1362 | int one = 1; |
| 1363 | ioctl (inchannel, FIONBIO, &one); |
| 1364 | } |
| 1365 | #endif |
| 1366 | |
| 1367 | #ifdef O_NONBLOCK |
| 1368 | fcntl (inchannel, F_SETFL, O_NONBLOCK); |
| 1369 | fcntl (outchannel, F_SETFL, O_NONBLOCK); |
| 1370 | #else |
| 1371 | #ifdef O_NDELAY |
| 1372 | fcntl (inchannel, F_SETFL, O_NDELAY); |
| 1373 | fcntl (outchannel, F_SETFL, O_NDELAY); |
| 1374 | #endif |
| 1375 | #endif |
| 1376 | |
| 1377 | /* Record this as an active process, with its channels. |
| 1378 | As a result, child_setup will close Emacs's side of the pipes. */ |
| 1379 | chan_process[inchannel] = process; |
| 1380 | XSETINT (XPROCESS (process)->infd, inchannel); |
| 1381 | XSETINT (XPROCESS (process)->outfd, outchannel); |
| 1382 | /* Record the tty descriptor used in the subprocess. */ |
| 1383 | if (forkin < 0) |
| 1384 | XPROCESS (process)->subtty = Qnil; |
| 1385 | else |
| 1386 | XSETFASTINT (XPROCESS (process)->subtty, forkin); |
| 1387 | XPROCESS (process)->pty_flag = (pty_flag ? Qt : Qnil); |
| 1388 | XPROCESS (process)->status = Qrun; |
| 1389 | if (!proc_decode_coding_system[inchannel]) |
| 1390 | proc_decode_coding_system[inchannel] |
| 1391 | = (struct coding_system *) xmalloc (sizeof (struct coding_system)); |
| 1392 | setup_coding_system (XPROCESS (process)->decode_coding_system, |
| 1393 | proc_decode_coding_system[inchannel]); |
| 1394 | if (!proc_encode_coding_system[outchannel]) |
| 1395 | proc_encode_coding_system[outchannel] |
| 1396 | = (struct coding_system *) xmalloc (sizeof (struct coding_system)); |
| 1397 | setup_coding_system (XPROCESS (process)->encode_coding_system, |
| 1398 | proc_encode_coding_system[outchannel]); |
| 1399 | |
| 1400 | /* Delay interrupts until we have a chance to store |
| 1401 | the new fork's pid in its process structure */ |
| 1402 | #ifdef POSIX_SIGNALS |
| 1403 | sigemptyset (&blocked); |
| 1404 | #ifdef SIGCHLD |
| 1405 | sigaddset (&blocked, SIGCHLD); |
| 1406 | #endif |
| 1407 | #ifdef HAVE_VFORK |
| 1408 | /* On many hosts (e.g. Solaris 2.4), if a vforked child calls `signal', |
| 1409 | this sets the parent's signal handlers as well as the child's. |
| 1410 | So delay all interrupts whose handlers the child might munge, |
| 1411 | and record the current handlers so they can be restored later. */ |
| 1412 | sigaddset (&blocked, SIGINT ); sigaction (SIGINT , 0, &sigint_action ); |
| 1413 | sigaddset (&blocked, SIGQUIT); sigaction (SIGQUIT, 0, &sigquit_action); |
| 1414 | #ifdef AIX |
| 1415 | sigaddset (&blocked, SIGHUP ); sigaction (SIGHUP , 0, &sighup_action ); |
| 1416 | #endif |
| 1417 | #endif /* HAVE_VFORK */ |
| 1418 | sigprocmask (SIG_BLOCK, &blocked, &procmask); |
| 1419 | #else /* !POSIX_SIGNALS */ |
| 1420 | #ifdef SIGCHLD |
| 1421 | #ifdef BSD4_1 |
| 1422 | sighold (SIGCHLD); |
| 1423 | #else /* not BSD4_1 */ |
| 1424 | #if defined (BSD_SYSTEM) || defined (UNIPLUS) || defined (HPUX) |
| 1425 | sigsetmask (sigmask (SIGCHLD)); |
| 1426 | #else /* ordinary USG */ |
| 1427 | #if 0 |
| 1428 | sigchld_deferred = 0; |
| 1429 | sigchld = signal (SIGCHLD, create_process_sigchld); |
| 1430 | #endif |
| 1431 | #endif /* ordinary USG */ |
| 1432 | #endif /* not BSD4_1 */ |
| 1433 | #endif /* SIGCHLD */ |
| 1434 | #endif /* !POSIX_SIGNALS */ |
| 1435 | |
| 1436 | FD_SET (inchannel, &input_wait_mask); |
| 1437 | FD_SET (inchannel, &non_keyboard_wait_mask); |
| 1438 | if (inchannel > max_process_desc) |
| 1439 | max_process_desc = inchannel; |
| 1440 | |
| 1441 | /* Until we store the proper pid, enable sigchld_handler |
| 1442 | to recognize an unknown pid as standing for this process. |
| 1443 | It is very important not to let this `marker' value stay |
| 1444 | in the table after this function has returned; if it does |
| 1445 | it might cause call-process to hang and subsequent asynchronous |
| 1446 | processes to get their return values scrambled. */ |
| 1447 | XSETINT (XPROCESS (process)->pid, -1); |
| 1448 | |
| 1449 | BLOCK_INPUT; |
| 1450 | |
| 1451 | { |
| 1452 | /* child_setup must clobber environ on systems with true vfork. |
| 1453 | Protect it from permanent change. */ |
| 1454 | char **save_environ = environ; |
| 1455 | |
| 1456 | #ifndef WINDOWSNT |
| 1457 | pid = vfork (); |
| 1458 | if (pid == 0) |
| 1459 | #endif /* not WINDOWSNT */ |
| 1460 | { |
| 1461 | int xforkin = forkin; |
| 1462 | int xforkout = forkout; |
| 1463 | |
| 1464 | #if 0 /* This was probably a mistake--it duplicates code later on, |
| 1465 | but fails to handle all the cases. */ |
| 1466 | /* Make sure SIGCHLD is not blocked in the child. */ |
| 1467 | sigsetmask (SIGEMPTYMASK); |
| 1468 | #endif |
| 1469 | |
| 1470 | /* Make the pty be the controlling terminal of the process. */ |
| 1471 | #ifdef HAVE_PTYS |
| 1472 | /* First, disconnect its current controlling terminal. */ |
| 1473 | #ifdef HAVE_SETSID |
| 1474 | /* We tried doing setsid only if pty_flag, but it caused |
| 1475 | process_set_signal to fail on SGI when using a pipe. */ |
| 1476 | setsid (); |
| 1477 | /* Make the pty's terminal the controlling terminal. */ |
| 1478 | if (pty_flag) |
| 1479 | { |
| 1480 | #ifdef TIOCSCTTY |
| 1481 | /* We ignore the return value |
| 1482 | because faith@cs.unc.edu says that is necessary on Linux. */ |
| 1483 | ioctl (xforkin, TIOCSCTTY, 0); |
| 1484 | #endif |
| 1485 | } |
| 1486 | #else /* not HAVE_SETSID */ |
| 1487 | #ifdef USG |
| 1488 | /* It's very important to call setpgrp here and no time |
| 1489 | afterwards. Otherwise, we lose our controlling tty which |
| 1490 | is set when we open the pty. */ |
| 1491 | setpgrp (); |
| 1492 | #endif /* USG */ |
| 1493 | #endif /* not HAVE_SETSID */ |
| 1494 | #if defined (HAVE_TERMIOS) && defined (LDISC1) |
| 1495 | if (pty_flag && xforkin >= 0) |
| 1496 | { |
| 1497 | struct termios t; |
| 1498 | tcgetattr (xforkin, &t); |
| 1499 | t.c_lflag = LDISC1; |
| 1500 | if (tcsetattr (xforkin, TCSANOW, &t) < 0) |
| 1501 | write (1, "create_process/tcsetattr LDISC1 failed\n", 39); |
| 1502 | } |
| 1503 | #else |
| 1504 | #if defined (NTTYDISC) && defined (TIOCSETD) |
| 1505 | if (pty_flag && xforkin >= 0) |
| 1506 | { |
| 1507 | /* Use new line discipline. */ |
| 1508 | int ldisc = NTTYDISC; |
| 1509 | ioctl (xforkin, TIOCSETD, &ldisc); |
| 1510 | } |
| 1511 | #endif |
| 1512 | #endif |
| 1513 | #ifdef TIOCNOTTY |
| 1514 | /* In 4.3BSD, the TIOCSPGRP bug has been fixed, and now you |
| 1515 | can do TIOCSPGRP only to the process's controlling tty. */ |
| 1516 | if (pty_flag) |
| 1517 | { |
| 1518 | /* I wonder: would just ioctl (0, TIOCNOTTY, 0) work here? |
| 1519 | I can't test it since I don't have 4.3. */ |
| 1520 | int j = open ("/dev/tty", O_RDWR, 0); |
| 1521 | ioctl (j, TIOCNOTTY, 0); |
| 1522 | close (j); |
| 1523 | #ifndef USG |
| 1524 | /* In order to get a controlling terminal on some versions |
| 1525 | of BSD, it is necessary to put the process in pgrp 0 |
| 1526 | before it opens the terminal. */ |
| 1527 | #ifdef HAVE_SETPGID |
| 1528 | setpgid (0, 0); |
| 1529 | #else |
| 1530 | setpgrp (0, 0); |
| 1531 | #endif |
| 1532 | #endif |
| 1533 | } |
| 1534 | #endif /* TIOCNOTTY */ |
| 1535 | |
| 1536 | #if !defined (RTU) && !defined (UNIPLUS) && !defined (DONT_REOPEN_PTY) |
| 1537 | /*** There is a suggestion that this ought to be a |
| 1538 | conditional on TIOCSPGRP, |
| 1539 | or !(defined (HAVE_SETSID) && defined (TIOCSCTTY)). |
| 1540 | Trying the latter gave the wrong results on Debian GNU/Linux 1.1; |
| 1541 | that system does seem to need this code, even though |
| 1542 | both HAVE_SETSID and TIOCSCTTY are defined. */ |
| 1543 | /* Now close the pty (if we had it open) and reopen it. |
| 1544 | This makes the pty the controlling terminal of the subprocess. */ |
| 1545 | if (pty_flag) |
| 1546 | { |
| 1547 | #ifdef SET_CHILD_PTY_PGRP |
| 1548 | int pgrp = getpid (); |
| 1549 | #endif |
| 1550 | |
| 1551 | /* I wonder if close (open (pty_name, ...)) would work? */ |
| 1552 | if (xforkin >= 0) |
| 1553 | close (xforkin); |
| 1554 | xforkout = xforkin = open (pty_name, O_RDWR, 0); |
| 1555 | |
| 1556 | if (xforkin < 0) |
| 1557 | { |
| 1558 | write (1, "Couldn't open the pty terminal ", 31); |
| 1559 | write (1, pty_name, strlen (pty_name)); |
| 1560 | write (1, "\n", 1); |
| 1561 | _exit (1); |
| 1562 | } |
| 1563 | |
| 1564 | #ifdef SET_CHILD_PTY_PGRP |
| 1565 | ioctl (xforkin, TIOCSPGRP, &pgrp); |
| 1566 | ioctl (xforkout, TIOCSPGRP, &pgrp); |
| 1567 | #endif |
| 1568 | } |
| 1569 | #endif /* not UNIPLUS and not RTU and not DONT_REOPEN_PTY */ |
| 1570 | |
| 1571 | #ifdef SETUP_SLAVE_PTY |
| 1572 | if (pty_flag) |
| 1573 | { |
| 1574 | SETUP_SLAVE_PTY; |
| 1575 | } |
| 1576 | #endif /* SETUP_SLAVE_PTY */ |
| 1577 | #ifdef AIX |
| 1578 | /* On AIX, we've disabled SIGHUP above once we start a child on a pty. |
| 1579 | Now reenable it in the child, so it will die when we want it to. */ |
| 1580 | if (pty_flag) |
| 1581 | signal (SIGHUP, SIG_DFL); |
| 1582 | #endif |
| 1583 | #endif /* HAVE_PTYS */ |
| 1584 | |
| 1585 | signal (SIGINT, SIG_DFL); |
| 1586 | signal (SIGQUIT, SIG_DFL); |
| 1587 | |
| 1588 | /* Stop blocking signals in the child. */ |
| 1589 | #ifdef POSIX_SIGNALS |
| 1590 | sigprocmask (SIG_SETMASK, &procmask, 0); |
| 1591 | #else /* !POSIX_SIGNALS */ |
| 1592 | #ifdef SIGCHLD |
| 1593 | #ifdef BSD4_1 |
| 1594 | sigrelse (SIGCHLD); |
| 1595 | #else /* not BSD4_1 */ |
| 1596 | #if defined (BSD_SYSTEM) || defined (UNIPLUS) || defined (HPUX) |
| 1597 | sigsetmask (SIGEMPTYMASK); |
| 1598 | #else /* ordinary USG */ |
| 1599 | #if 0 |
| 1600 | signal (SIGCHLD, sigchld); |
| 1601 | #endif |
| 1602 | #endif /* ordinary USG */ |
| 1603 | #endif /* not BSD4_1 */ |
| 1604 | #endif /* SIGCHLD */ |
| 1605 | #endif /* !POSIX_SIGNALS */ |
| 1606 | |
| 1607 | if (pty_flag) |
| 1608 | child_setup_tty (xforkout); |
| 1609 | #ifdef WINDOWSNT |
| 1610 | pid = child_setup (xforkin, xforkout, xforkout, |
| 1611 | new_argv, 1, current_dir); |
| 1612 | #else /* not WINDOWSNT */ |
| 1613 | child_setup (xforkin, xforkout, xforkout, |
| 1614 | new_argv, 1, current_dir); |
| 1615 | #endif /* not WINDOWSNT */ |
| 1616 | } |
| 1617 | environ = save_environ; |
| 1618 | } |
| 1619 | |
| 1620 | UNBLOCK_INPUT; |
| 1621 | |
| 1622 | /* This runs in the Emacs process. */ |
| 1623 | if (pid < 0) |
| 1624 | { |
| 1625 | if (forkin >= 0) |
| 1626 | close (forkin); |
| 1627 | if (forkin != forkout && forkout >= 0) |
| 1628 | close (forkout); |
| 1629 | } |
| 1630 | else |
| 1631 | { |
| 1632 | /* vfork succeeded. */ |
| 1633 | XSETFASTINT (XPROCESS (process)->pid, pid); |
| 1634 | |
| 1635 | #ifdef WINDOWSNT |
| 1636 | register_child (pid, inchannel); |
| 1637 | #endif /* WINDOWSNT */ |
| 1638 | |
| 1639 | /* If the subfork execv fails, and it exits, |
| 1640 | this close hangs. I don't know why. |
| 1641 | So have an interrupt jar it loose. */ |
| 1642 | stop_polling (); |
| 1643 | signal (SIGALRM, create_process_1); |
| 1644 | alarm (1); |
| 1645 | XPROCESS (process)->subtty = Qnil; |
| 1646 | if (forkin >= 0) |
| 1647 | close (forkin); |
| 1648 | alarm (0); |
| 1649 | start_polling (); |
| 1650 | if (forkin != forkout && forkout >= 0) |
| 1651 | close (forkout); |
| 1652 | |
| 1653 | #ifdef HAVE_PTYS |
| 1654 | if (pty_flag) |
| 1655 | XPROCESS (process)->tty_name = build_string (pty_name); |
| 1656 | else |
| 1657 | #endif |
| 1658 | XPROCESS (process)->tty_name = Qnil; |
| 1659 | } |
| 1660 | |
| 1661 | /* Restore the signal state whether vfork succeeded or not. |
| 1662 | (We will signal an error, below, if it failed.) */ |
| 1663 | #ifdef POSIX_SIGNALS |
| 1664 | #ifdef HAVE_VFORK |
| 1665 | /* Restore the parent's signal handlers. */ |
| 1666 | sigaction (SIGINT, &sigint_action, 0); |
| 1667 | sigaction (SIGQUIT, &sigquit_action, 0); |
| 1668 | #ifdef AIX |
| 1669 | sigaction (SIGHUP, &sighup_action, 0); |
| 1670 | #endif |
| 1671 | #endif /* HAVE_VFORK */ |
| 1672 | /* Stop blocking signals in the parent. */ |
| 1673 | sigprocmask (SIG_SETMASK, &procmask, 0); |
| 1674 | #else /* !POSIX_SIGNALS */ |
| 1675 | #ifdef SIGCHLD |
| 1676 | #ifdef BSD4_1 |
| 1677 | sigrelse (SIGCHLD); |
| 1678 | #else /* not BSD4_1 */ |
| 1679 | #if defined (BSD_SYSTEM) || defined (UNIPLUS) || defined (HPUX) |
| 1680 | sigsetmask (SIGEMPTYMASK); |
| 1681 | #else /* ordinary USG */ |
| 1682 | #if 0 |
| 1683 | signal (SIGCHLD, sigchld); |
| 1684 | /* Now really handle any of these signals |
| 1685 | that came in during this function. */ |
| 1686 | if (sigchld_deferred) |
| 1687 | kill (getpid (), SIGCHLD); |
| 1688 | #endif |
| 1689 | #endif /* ordinary USG */ |
| 1690 | #endif /* not BSD4_1 */ |
| 1691 | #endif /* SIGCHLD */ |
| 1692 | #endif /* !POSIX_SIGNALS */ |
| 1693 | |
| 1694 | /* Now generate the error if vfork failed. */ |
| 1695 | if (pid < 0) |
| 1696 | report_file_error ("Doing vfork", Qnil); |
| 1697 | } |
| 1698 | #endif /* not VMS */ |
| 1699 | |
| 1700 | #ifdef HAVE_SOCKETS |
| 1701 | |
| 1702 | /* open a TCP network connection to a given HOST/SERVICE. Treated |
| 1703 | exactly like a normal process when reading and writing. Only |
| 1704 | differences are in status display and process deletion. A network |
| 1705 | connection has no PID; you cannot signal it. All you can do is |
| 1706 | deactivate and close it via delete-process */ |
| 1707 | |
| 1708 | DEFUN ("open-network-stream", Fopen_network_stream, Sopen_network_stream, |
| 1709 | 4, 4, 0, |
| 1710 | "Open a TCP connection for a service to a host.\n\ |
| 1711 | Returns a subprocess-object to represent the connection.\n\ |
| 1712 | Input and output work as for subprocesses; `delete-process' closes it.\n\ |
| 1713 | Args are NAME BUFFER HOST SERVICE.\n\ |
| 1714 | NAME is name for process. It is modified if necessary to make it unique.\n\ |
| 1715 | BUFFER is the buffer (or buffer-name) to associate with the process.\n\ |
| 1716 | Process output goes at end of that buffer, unless you specify\n\ |
| 1717 | an output stream or filter function to handle the output.\n\ |
| 1718 | BUFFER may be also nil, meaning that this process is not associated\n\ |
| 1719 | with any buffer\n\ |
| 1720 | Third arg is name of the host to connect to, or its IP address.\n\ |
| 1721 | Fourth arg SERVICE is name of the service desired, or an integer\n\ |
| 1722 | specifying a port number to connect to.") |
| 1723 | (name, buffer, host, service) |
| 1724 | Lisp_Object name, buffer, host, service; |
| 1725 | { |
| 1726 | Lisp_Object proc; |
| 1727 | register int i; |
| 1728 | struct sockaddr_in address; |
| 1729 | struct servent *svc_info; |
| 1730 | struct hostent *host_info_ptr, host_info; |
| 1731 | char *(addr_list[2]); |
| 1732 | IN_ADDR numeric_addr; |
| 1733 | int s, outch, inch; |
| 1734 | char errstring[80]; |
| 1735 | int port; |
| 1736 | struct hostent host_info_fixed; |
| 1737 | struct gcpro gcpro1, gcpro2, gcpro3, gcpro4; |
| 1738 | int retry = 0; |
| 1739 | int count = specpdl_ptr - specpdl; |
| 1740 | |
| 1741 | #ifdef WINDOWSNT |
| 1742 | /* Ensure socket support is loaded if available. */ |
| 1743 | init_winsock (TRUE); |
| 1744 | #endif |
| 1745 | |
| 1746 | GCPRO4 (name, buffer, host, service); |
| 1747 | CHECK_STRING (name, 0); |
| 1748 | CHECK_STRING (host, 0); |
| 1749 | if (INTEGERP (service)) |
| 1750 | port = htons ((unsigned short) XINT (service)); |
| 1751 | else |
| 1752 | { |
| 1753 | CHECK_STRING (service, 0); |
| 1754 | svc_info = getservbyname (XSTRING (service)->data, "tcp"); |
| 1755 | if (svc_info == 0) |
| 1756 | error ("Unknown service \"%s\"", XSTRING (service)->data); |
| 1757 | port = svc_info->s_port; |
| 1758 | } |
| 1759 | |
| 1760 | /* Slow down polling to every ten seconds. |
| 1761 | Some kernels have a bug which causes retrying connect to fail |
| 1762 | after a connect. Polling can interfere with gethostbyname too. */ |
| 1763 | #ifdef POLL_FOR_INPUT |
| 1764 | bind_polling_period (10); |
| 1765 | #endif |
| 1766 | |
| 1767 | #ifndef TERM |
| 1768 | while (1) |
| 1769 | { |
| 1770 | #ifdef TRY_AGAIN |
| 1771 | h_errno = 0; |
| 1772 | #endif |
| 1773 | immediate_quit = 1; |
| 1774 | QUIT; |
| 1775 | host_info_ptr = gethostbyname (XSTRING (host)->data); |
| 1776 | immediate_quit = 0; |
| 1777 | #ifdef TRY_AGAIN |
| 1778 | if (! (host_info_ptr == 0 && h_errno == TRY_AGAIN)) |
| 1779 | #endif |
| 1780 | break; |
| 1781 | Fsleep_for (make_number (1), Qnil); |
| 1782 | } |
| 1783 | if (host_info_ptr == 0) |
| 1784 | /* Attempt to interpret host as numeric inet address */ |
| 1785 | { |
| 1786 | numeric_addr = inet_addr ((char *) XSTRING (host)->data); |
| 1787 | if (NUMERIC_ADDR_ERROR) |
| 1788 | error ("Unknown host \"%s\"", XSTRING (host)->data); |
| 1789 | |
| 1790 | host_info_ptr = &host_info; |
| 1791 | host_info.h_name = 0; |
| 1792 | host_info.h_aliases = 0; |
| 1793 | host_info.h_addrtype = AF_INET; |
| 1794 | #ifdef h_addr |
| 1795 | /* Older machines have only one address slot called h_addr. |
| 1796 | Newer machines have h_addr_list, but #define h_addr to |
| 1797 | be its first element. */ |
| 1798 | host_info.h_addr_list = &(addr_list[0]); |
| 1799 | #endif |
| 1800 | host_info.h_addr = (char*)(&numeric_addr); |
| 1801 | addr_list[1] = 0; |
| 1802 | /* numeric_addr isn't null-terminated; it has fixed length. */ |
| 1803 | host_info.h_length = sizeof (numeric_addr); |
| 1804 | } |
| 1805 | |
| 1806 | bzero (&address, sizeof address); |
| 1807 | bcopy (host_info_ptr->h_addr, (char *) &address.sin_addr, |
| 1808 | host_info_ptr->h_length); |
| 1809 | address.sin_family = host_info_ptr->h_addrtype; |
| 1810 | address.sin_port = port; |
| 1811 | |
| 1812 | s = socket (host_info_ptr->h_addrtype, SOCK_STREAM, 0); |
| 1813 | if (s < 0) |
| 1814 | report_file_error ("error creating socket", Fcons (name, Qnil)); |
| 1815 | |
| 1816 | /* Kernel bugs (on Ultrix at least) cause lossage (not just EINTR) |
| 1817 | when connect is interrupted. So let's not let it get interrupted. |
| 1818 | Note we do not turn off polling, because polling is only used |
| 1819 | when not interrupt_input, and thus not normally used on the systems |
| 1820 | which have this bug. On systems which use polling, there's no way |
| 1821 | to quit if polling is turned off. */ |
| 1822 | if (interrupt_input) |
| 1823 | unrequest_sigio (); |
| 1824 | |
| 1825 | loop: |
| 1826 | |
| 1827 | immediate_quit = 1; |
| 1828 | QUIT; |
| 1829 | |
| 1830 | if (connect (s, (struct sockaddr *) &address, sizeof address) == -1 |
| 1831 | && errno != EISCONN) |
| 1832 | { |
| 1833 | int xerrno = errno; |
| 1834 | |
| 1835 | immediate_quit = 0; |
| 1836 | |
| 1837 | if (errno == EINTR) |
| 1838 | goto loop; |
| 1839 | if (errno == EADDRINUSE && retry < 20) |
| 1840 | { |
| 1841 | /* A delay here is needed on some FreeBSD systems, |
| 1842 | and it is harmless, since this retrying takes time anyway |
| 1843 | and should be infrequent. */ |
| 1844 | Fsleep_for (make_number (1), Qnil); |
| 1845 | retry++; |
| 1846 | goto loop; |
| 1847 | } |
| 1848 | |
| 1849 | close (s); |
| 1850 | |
| 1851 | if (interrupt_input) |
| 1852 | request_sigio (); |
| 1853 | |
| 1854 | errno = xerrno; |
| 1855 | report_file_error ("connection failed", |
| 1856 | Fcons (host, Fcons (name, Qnil))); |
| 1857 | } |
| 1858 | |
| 1859 | immediate_quit = 0; |
| 1860 | |
| 1861 | #ifdef POLL_FOR_INPUT |
| 1862 | unbind_to (count, Qnil); |
| 1863 | #endif |
| 1864 | |
| 1865 | if (interrupt_input) |
| 1866 | request_sigio (); |
| 1867 | |
| 1868 | #else /* TERM */ |
| 1869 | s = connect_server (0); |
| 1870 | if (s < 0) |
| 1871 | report_file_error ("error creating socket", Fcons (name, Qnil)); |
| 1872 | send_command (s, C_PORT, 0, "%s:%d", XSTRING (host)->data, ntohs (port)); |
| 1873 | send_command (s, C_DUMB, 1, 0); |
| 1874 | #endif /* TERM */ |
| 1875 | |
| 1876 | inch = s; |
| 1877 | outch = s; |
| 1878 | |
| 1879 | if (!NILP (buffer)) |
| 1880 | buffer = Fget_buffer_create (buffer); |
| 1881 | proc = make_process (name); |
| 1882 | |
| 1883 | chan_process[inch] = proc; |
| 1884 | |
| 1885 | #ifdef O_NONBLOCK |
| 1886 | fcntl (inch, F_SETFL, O_NONBLOCK); |
| 1887 | #else |
| 1888 | #ifdef O_NDELAY |
| 1889 | fcntl (inch, F_SETFL, O_NDELAY); |
| 1890 | #endif |
| 1891 | #endif |
| 1892 | |
| 1893 | XPROCESS (proc)->childp = Fcons (host, Fcons (service, Qnil)); |
| 1894 | XPROCESS (proc)->command_channel_p = Qnil; |
| 1895 | XPROCESS (proc)->buffer = buffer; |
| 1896 | XPROCESS (proc)->sentinel = Qnil; |
| 1897 | XPROCESS (proc)->filter = Qnil; |
| 1898 | XPROCESS (proc)->command = Qnil; |
| 1899 | XPROCESS (proc)->pid = Qnil; |
| 1900 | XSETINT (XPROCESS (proc)->infd, inch); |
| 1901 | XSETINT (XPROCESS (proc)->outfd, outch); |
| 1902 | XPROCESS (proc)->status = Qrun; |
| 1903 | FD_SET (inch, &input_wait_mask); |
| 1904 | FD_SET (inch, &non_keyboard_wait_mask); |
| 1905 | if (inch > max_process_desc) |
| 1906 | max_process_desc = inch; |
| 1907 | |
| 1908 | if (!NILP (buffer) && NILP (XBUFFER (buffer)->enable_multibyte_characters) |
| 1909 | || NILP (buffer) && NILP (buffer_defaults.enable_multibyte_characters)) |
| 1910 | { |
| 1911 | XPROCESS (proc)->decode_coding_system = Qnil; |
| 1912 | XPROCESS (proc)->encode_coding_system = Qnil; |
| 1913 | } |
| 1914 | else |
| 1915 | { |
| 1916 | /* Setup coding systems for communicating with the network stream. */ |
| 1917 | struct gcpro gcpro1; |
| 1918 | /* Qt denotes we have not yet called Ffind_operation_coding_system. */ |
| 1919 | Lisp_Object coding_systems = Qt; |
| 1920 | Lisp_Object args[5], val; |
| 1921 | |
| 1922 | if (!NILP (Vcoding_system_for_read)) |
| 1923 | val = Vcoding_system_for_read; |
| 1924 | else if (NILP (current_buffer->enable_multibyte_characters)) |
| 1925 | /* We dare not decode end-of-line format by setting VAL to |
| 1926 | Qemacs_mule, because the existing Emacs Lisp libraries |
| 1927 | assume that they receive bare code including a sequene of |
| 1928 | CR LF. */ |
| 1929 | val = Qnil; |
| 1930 | else |
| 1931 | { |
| 1932 | args[0] = Qopen_network_stream, args[1] = name, |
| 1933 | args[2] = buffer, args[3] = host, args[4] = service; |
| 1934 | GCPRO1 (proc); |
| 1935 | coding_systems = Ffind_operation_coding_system (5, args); |
| 1936 | UNGCPRO; |
| 1937 | if (CONSP (coding_systems)) |
| 1938 | val = XCONS (coding_systems)->car; |
| 1939 | else if (CONSP (Vdefault_process_coding_system)) |
| 1940 | val = XCONS (Vdefault_process_coding_system)->car; |
| 1941 | else |
| 1942 | val = Qnil; |
| 1943 | } |
| 1944 | XPROCESS (proc)->decode_coding_system = val; |
| 1945 | |
| 1946 | if (!NILP (Vcoding_system_for_write)) |
| 1947 | val = Vcoding_system_for_write; |
| 1948 | else if (NILP (current_buffer->enable_multibyte_characters)) |
| 1949 | val = Qnil; |
| 1950 | else |
| 1951 | { |
| 1952 | if (EQ (coding_systems, Qt)) |
| 1953 | { |
| 1954 | args[0] = Qopen_network_stream, args[1] = name, |
| 1955 | args[2] = buffer, args[3] = host, args[4] = service; |
| 1956 | GCPRO1 (proc); |
| 1957 | coding_systems = Ffind_operation_coding_system (5, args); |
| 1958 | UNGCPRO; |
| 1959 | } |
| 1960 | if (CONSP (coding_systems)) |
| 1961 | val = XCONS (coding_systems)->cdr; |
| 1962 | else if (CONSP (Vdefault_process_coding_system)) |
| 1963 | val = XCONS (Vdefault_process_coding_system)->cdr; |
| 1964 | else |
| 1965 | val = Qnil; |
| 1966 | } |
| 1967 | XPROCESS (proc)->encode_coding_system = val; |
| 1968 | } |
| 1969 | |
| 1970 | if (!proc_decode_coding_system[inch]) |
| 1971 | proc_decode_coding_system[inch] |
| 1972 | = (struct coding_system *) xmalloc (sizeof (struct coding_system)); |
| 1973 | setup_coding_system (XPROCESS (proc)->decode_coding_system, |
| 1974 | proc_decode_coding_system[inch]); |
| 1975 | if (!proc_encode_coding_system[outch]) |
| 1976 | proc_encode_coding_system[outch] |
| 1977 | = (struct coding_system *) xmalloc (sizeof (struct coding_system)); |
| 1978 | setup_coding_system (XPROCESS (proc)->encode_coding_system, |
| 1979 | proc_encode_coding_system[outch]); |
| 1980 | |
| 1981 | XPROCESS (proc)->decoding_buf = make_uninit_string (0); |
| 1982 | XPROCESS (proc)->encoding_buf = make_uninit_string (0); |
| 1983 | |
| 1984 | UNGCPRO; |
| 1985 | return proc; |
| 1986 | } |
| 1987 | #endif /* HAVE_SOCKETS */ |
| 1988 | |
| 1989 | deactivate_process (proc) |
| 1990 | Lisp_Object proc; |
| 1991 | { |
| 1992 | register int inchannel, outchannel; |
| 1993 | register struct Lisp_Process *p = XPROCESS (proc); |
| 1994 | |
| 1995 | inchannel = XINT (p->infd); |
| 1996 | outchannel = XINT (p->outfd); |
| 1997 | |
| 1998 | if (inchannel >= 0) |
| 1999 | { |
| 2000 | /* Beware SIGCHLD hereabouts. */ |
| 2001 | flush_pending_output (inchannel); |
| 2002 | #ifdef VMS |
| 2003 | { |
| 2004 | VMS_PROC_STUFF *get_vms_process_pointer (), *vs; |
| 2005 | sys$dassgn (outchannel); |
| 2006 | vs = get_vms_process_pointer (p->pid); |
| 2007 | if (vs) |
| 2008 | give_back_vms_process_stuff (vs); |
| 2009 | } |
| 2010 | #else |
| 2011 | close (inchannel); |
| 2012 | if (outchannel >= 0 && outchannel != inchannel) |
| 2013 | close (outchannel); |
| 2014 | #endif |
| 2015 | |
| 2016 | XSETINT (p->infd, -1); |
| 2017 | XSETINT (p->outfd, -1); |
| 2018 | chan_process[inchannel] = Qnil; |
| 2019 | FD_CLR (inchannel, &input_wait_mask); |
| 2020 | FD_CLR (inchannel, &non_keyboard_wait_mask); |
| 2021 | if (inchannel == max_process_desc) |
| 2022 | { |
| 2023 | int i; |
| 2024 | /* We just closed the highest-numbered process input descriptor, |
| 2025 | so recompute the highest-numbered one now. */ |
| 2026 | max_process_desc = 0; |
| 2027 | for (i = 0; i < MAXDESC; i++) |
| 2028 | if (!NILP (chan_process[i])) |
| 2029 | max_process_desc = i; |
| 2030 | } |
| 2031 | } |
| 2032 | } |
| 2033 | |
| 2034 | /* Close all descriptors currently in use for communication |
| 2035 | with subprocess. This is used in a newly-forked subprocess |
| 2036 | to get rid of irrelevant descriptors. */ |
| 2037 | |
| 2038 | close_process_descs () |
| 2039 | { |
| 2040 | #ifndef WINDOWSNT |
| 2041 | int i; |
| 2042 | for (i = 0; i < MAXDESC; i++) |
| 2043 | { |
| 2044 | Lisp_Object process; |
| 2045 | process = chan_process[i]; |
| 2046 | if (!NILP (process)) |
| 2047 | { |
| 2048 | int in = XINT (XPROCESS (process)->infd); |
| 2049 | int out = XINT (XPROCESS (process)->outfd); |
| 2050 | if (in >= 0) |
| 2051 | close (in); |
| 2052 | if (out >= 0 && in != out) |
| 2053 | close (out); |
| 2054 | } |
| 2055 | } |
| 2056 | #endif |
| 2057 | } |
| 2058 | \f |
| 2059 | DEFUN ("accept-process-output", Faccept_process_output, Saccept_process_output, |
| 2060 | 0, 3, 0, |
| 2061 | "Allow any pending output from subprocesses to be read by Emacs.\n\ |
| 2062 | It is read into the process' buffers or given to their filter functions.\n\ |
| 2063 | Non-nil arg PROCESS means do not return until some output has been received\n\ |
| 2064 | from PROCESS.\n\ |
| 2065 | Non-nil second arg TIMEOUT and third arg TIMEOUT-MSECS are number of\n\ |
| 2066 | seconds and microseconds to wait; return after that much time whether\n\ |
| 2067 | or not there is input.\n\ |
| 2068 | Return non-nil iff we received any output before the timeout expired.") |
| 2069 | (process, timeout, timeout_msecs) |
| 2070 | register Lisp_Object process, timeout, timeout_msecs; |
| 2071 | { |
| 2072 | int seconds; |
| 2073 | int useconds; |
| 2074 | |
| 2075 | if (! NILP (timeout_msecs)) |
| 2076 | { |
| 2077 | CHECK_NUMBER (timeout_msecs, 2); |
| 2078 | useconds = XINT (timeout_msecs); |
| 2079 | if (!INTEGERP (timeout)) |
| 2080 | XSETINT (timeout, 0); |
| 2081 | |
| 2082 | { |
| 2083 | int carry = useconds / 1000000; |
| 2084 | |
| 2085 | XSETINT (timeout, XINT (timeout) + carry); |
| 2086 | useconds -= carry * 1000000; |
| 2087 | |
| 2088 | /* I think this clause is necessary because C doesn't |
| 2089 | guarantee a particular rounding direction for negative |
| 2090 | integers. */ |
| 2091 | if (useconds < 0) |
| 2092 | { |
| 2093 | XSETINT (timeout, XINT (timeout) - 1); |
| 2094 | useconds += 1000000; |
| 2095 | } |
| 2096 | } |
| 2097 | } |
| 2098 | else |
| 2099 | useconds = 0; |
| 2100 | |
| 2101 | if (! NILP (timeout)) |
| 2102 | { |
| 2103 | CHECK_NUMBER (timeout, 1); |
| 2104 | seconds = XINT (timeout); |
| 2105 | if (seconds < 0 || (seconds == 0 && useconds == 0)) |
| 2106 | seconds = -1; |
| 2107 | } |
| 2108 | else |
| 2109 | { |
| 2110 | if (NILP (process)) |
| 2111 | seconds = -1; |
| 2112 | else |
| 2113 | seconds = 0; |
| 2114 | } |
| 2115 | |
| 2116 | if (NILP (process)) |
| 2117 | XSETFASTINT (process, 0); |
| 2118 | |
| 2119 | return |
| 2120 | (wait_reading_process_input (seconds, useconds, process, 0) |
| 2121 | ? Qt : Qnil); |
| 2122 | } |
| 2123 | |
| 2124 | /* This variable is different from waiting_for_input in keyboard.c. |
| 2125 | It is used to communicate to a lisp process-filter/sentinel (via the |
| 2126 | function Fwaiting_for_user_input_p below) whether emacs was waiting |
| 2127 | for user-input when that process-filter was called. |
| 2128 | waiting_for_input cannot be used as that is by definition 0 when |
| 2129 | lisp code is being evalled. |
| 2130 | This is also used in record_asynch_buffer_change. |
| 2131 | For that purpose, this must be 0 |
| 2132 | when not inside wait_reading_process_input. */ |
| 2133 | static int waiting_for_user_input_p; |
| 2134 | |
| 2135 | /* This is here so breakpoints can be put on it. */ |
| 2136 | static |
| 2137 | wait_reading_process_input_1 () |
| 2138 | { |
| 2139 | } |
| 2140 | |
| 2141 | /* Read and dispose of subprocess output while waiting for timeout to |
| 2142 | elapse and/or keyboard input to be available. |
| 2143 | |
| 2144 | TIME_LIMIT is: |
| 2145 | timeout in seconds, or |
| 2146 | zero for no limit, or |
| 2147 | -1 means gobble data immediately available but don't wait for any. |
| 2148 | |
| 2149 | MICROSECS is: |
| 2150 | an additional duration to wait, measured in microseconds. |
| 2151 | If this is nonzero and time_limit is 0, then the timeout |
| 2152 | consists of MICROSECS only. |
| 2153 | |
| 2154 | READ_KBD is a lisp value: |
| 2155 | 0 to ignore keyboard input, or |
| 2156 | 1 to return when input is available, or |
| 2157 | -1 meaning caller will actually read the input, so don't throw to |
| 2158 | the quit handler, or |
| 2159 | a cons cell, meaning wait until its car is non-nil |
| 2160 | (and gobble terminal input into the buffer if any arrives), or |
| 2161 | a process object, meaning wait until something arrives from that |
| 2162 | process. The return value is true iff we read some input from |
| 2163 | that process. |
| 2164 | |
| 2165 | DO_DISPLAY != 0 means redisplay should be done to show subprocess |
| 2166 | output that arrives. |
| 2167 | |
| 2168 | If READ_KBD is a pointer to a struct Lisp_Process, then the |
| 2169 | function returns true iff we received input from that process |
| 2170 | before the timeout elapsed. |
| 2171 | Otherwise, return true iff we received input from any process. */ |
| 2172 | |
| 2173 | wait_reading_process_input (time_limit, microsecs, read_kbd, do_display) |
| 2174 | int time_limit, microsecs; |
| 2175 | Lisp_Object read_kbd; |
| 2176 | int do_display; |
| 2177 | { |
| 2178 | register int channel, nfds, m; |
| 2179 | static SELECT_TYPE Available; |
| 2180 | int xerrno; |
| 2181 | Lisp_Object proc; |
| 2182 | EMACS_TIME timeout, end_time, garbage; |
| 2183 | SELECT_TYPE Atemp; |
| 2184 | int wait_channel = -1; |
| 2185 | struct Lisp_Process *wait_proc = 0; |
| 2186 | int got_some_input = 0; |
| 2187 | Lisp_Object *wait_for_cell = 0; |
| 2188 | |
| 2189 | FD_ZERO (&Available); |
| 2190 | |
| 2191 | /* If read_kbd is a process to watch, set wait_proc and wait_channel |
| 2192 | accordingly. */ |
| 2193 | if (PROCESSP (read_kbd)) |
| 2194 | { |
| 2195 | wait_proc = XPROCESS (read_kbd); |
| 2196 | wait_channel = XINT (wait_proc->infd); |
| 2197 | XSETFASTINT (read_kbd, 0); |
| 2198 | } |
| 2199 | |
| 2200 | /* If waiting for non-nil in a cell, record where. */ |
| 2201 | if (CONSP (read_kbd)) |
| 2202 | { |
| 2203 | wait_for_cell = &XCONS (read_kbd)->car; |
| 2204 | XSETFASTINT (read_kbd, 0); |
| 2205 | } |
| 2206 | |
| 2207 | waiting_for_user_input_p = XINT (read_kbd); |
| 2208 | |
| 2209 | /* Since we may need to wait several times, |
| 2210 | compute the absolute time to return at. */ |
| 2211 | if (time_limit || microsecs) |
| 2212 | { |
| 2213 | EMACS_GET_TIME (end_time); |
| 2214 | EMACS_SET_SECS_USECS (timeout, time_limit, microsecs); |
| 2215 | EMACS_ADD_TIME (end_time, end_time, timeout); |
| 2216 | } |
| 2217 | #ifdef hpux |
| 2218 | /* AlainF 5-Jul-1996 |
| 2219 | HP-UX 10.10 seem to have problems with signals coming in |
| 2220 | Causes "poll: interrupted system call" messages when Emacs is run |
| 2221 | in an X window |
| 2222 | Turn off periodic alarms (in case they are in use) */ |
| 2223 | stop_polling (); |
| 2224 | #endif |
| 2225 | |
| 2226 | while (1) |
| 2227 | { |
| 2228 | int timeout_reduced_for_timers = 0; |
| 2229 | |
| 2230 | /* If calling from keyboard input, do not quit |
| 2231 | since we want to return C-g as an input character. |
| 2232 | Otherwise, do pending quit if requested. */ |
| 2233 | if (XINT (read_kbd) >= 0) |
| 2234 | QUIT; |
| 2235 | |
| 2236 | /* Exit now if the cell we're waiting for became non-nil. */ |
| 2237 | if (wait_for_cell && ! NILP (*wait_for_cell)) |
| 2238 | break; |
| 2239 | |
| 2240 | /* Compute time from now till when time limit is up */ |
| 2241 | /* Exit if already run out */ |
| 2242 | if (time_limit == -1) |
| 2243 | { |
| 2244 | /* -1 specified for timeout means |
| 2245 | gobble output available now |
| 2246 | but don't wait at all. */ |
| 2247 | |
| 2248 | EMACS_SET_SECS_USECS (timeout, 0, 0); |
| 2249 | } |
| 2250 | else if (time_limit || microsecs) |
| 2251 | { |
| 2252 | EMACS_GET_TIME (timeout); |
| 2253 | EMACS_SUB_TIME (timeout, end_time, timeout); |
| 2254 | if (EMACS_TIME_NEG_P (timeout)) |
| 2255 | break; |
| 2256 | } |
| 2257 | else |
| 2258 | { |
| 2259 | EMACS_SET_SECS_USECS (timeout, 100000, 0); |
| 2260 | } |
| 2261 | |
| 2262 | /* Normally we run timers here. |
| 2263 | But not if wait_for_cell; in those cases, |
| 2264 | the wait is supposed to be short, |
| 2265 | and those callers cannot handle running arbitrary Lisp code here. */ |
| 2266 | if (! wait_for_cell) |
| 2267 | { |
| 2268 | EMACS_TIME timer_delay; |
| 2269 | int old_timers_run; |
| 2270 | |
| 2271 | retry: |
| 2272 | old_timers_run = timers_run; |
| 2273 | timer_delay = timer_check (1); |
| 2274 | if (timers_run != old_timers_run && do_display) |
| 2275 | { |
| 2276 | redisplay_preserve_echo_area (); |
| 2277 | /* We must retry, since a timer may have requeued itself |
| 2278 | and that could alter the time_delay. */ |
| 2279 | goto retry; |
| 2280 | } |
| 2281 | |
| 2282 | /* If there is unread keyboard input, also return. */ |
| 2283 | if (XINT (read_kbd) != 0 |
| 2284 | && requeued_events_pending_p ()) |
| 2285 | break; |
| 2286 | |
| 2287 | if (! EMACS_TIME_NEG_P (timer_delay) && time_limit != -1) |
| 2288 | { |
| 2289 | EMACS_TIME difference; |
| 2290 | EMACS_SUB_TIME (difference, timer_delay, timeout); |
| 2291 | if (EMACS_TIME_NEG_P (difference)) |
| 2292 | { |
| 2293 | timeout = timer_delay; |
| 2294 | timeout_reduced_for_timers = 1; |
| 2295 | } |
| 2296 | } |
| 2297 | /* If time_limit is -1, we are not going to wait at all. */ |
| 2298 | else if (time_limit != -1) |
| 2299 | { |
| 2300 | /* This is so a breakpoint can be put here. */ |
| 2301 | wait_reading_process_input_1 (); |
| 2302 | } |
| 2303 | } |
| 2304 | |
| 2305 | /* Cause C-g and alarm signals to take immediate action, |
| 2306 | and cause input available signals to zero out timeout. |
| 2307 | |
| 2308 | It is important that we do this before checking for process |
| 2309 | activity. If we get a SIGCHLD after the explicit checks for |
| 2310 | process activity, timeout is the only way we will know. */ |
| 2311 | if (XINT (read_kbd) < 0) |
| 2312 | set_waiting_for_input (&timeout); |
| 2313 | |
| 2314 | /* If status of something has changed, and no input is |
| 2315 | available, notify the user of the change right away. After |
| 2316 | this explicit check, we'll let the SIGCHLD handler zap |
| 2317 | timeout to get our attention. */ |
| 2318 | if (update_tick != process_tick && do_display) |
| 2319 | { |
| 2320 | Atemp = input_wait_mask; |
| 2321 | EMACS_SET_SECS_USECS (timeout, 0, 0); |
| 2322 | if ((select (max (max_process_desc, max_keyboard_desc) + 1, |
| 2323 | &Atemp, (SELECT_TYPE *)0, (SELECT_TYPE *)0, |
| 2324 | &timeout) |
| 2325 | <= 0)) |
| 2326 | { |
| 2327 | /* It's okay for us to do this and then continue with |
| 2328 | the loop, since timeout has already been zeroed out. */ |
| 2329 | clear_waiting_for_input (); |
| 2330 | status_notify (); |
| 2331 | } |
| 2332 | } |
| 2333 | |
| 2334 | /* Don't wait for output from a non-running process. */ |
| 2335 | if (wait_proc != 0 && !NILP (wait_proc->raw_status_low)) |
| 2336 | update_status (wait_proc); |
| 2337 | if (wait_proc != 0 |
| 2338 | && ! EQ (wait_proc->status, Qrun)) |
| 2339 | { |
| 2340 | int nread, total_nread = 0; |
| 2341 | |
| 2342 | clear_waiting_for_input (); |
| 2343 | XSETPROCESS (proc, wait_proc); |
| 2344 | |
| 2345 | /* Read data from the process, until we exhaust it. */ |
| 2346 | while (XINT (wait_proc->infd) >= 0 |
| 2347 | && (nread |
| 2348 | = read_process_output (proc, XINT (wait_proc->infd)))) |
| 2349 | { |
| 2350 | if (0 < nread) |
| 2351 | total_nread += nread; |
| 2352 | #ifdef EIO |
| 2353 | else if (nread == -1 && EIO == errno) |
| 2354 | break; |
| 2355 | #endif |
| 2356 | } |
| 2357 | if (total_nread > 0 && do_display) |
| 2358 | redisplay_preserve_echo_area (); |
| 2359 | |
| 2360 | break; |
| 2361 | } |
| 2362 | |
| 2363 | /* Wait till there is something to do */ |
| 2364 | |
| 2365 | if (wait_for_cell) |
| 2366 | Available = non_process_wait_mask; |
| 2367 | else if (! XINT (read_kbd)) |
| 2368 | Available = non_keyboard_wait_mask; |
| 2369 | else |
| 2370 | Available = input_wait_mask; |
| 2371 | |
| 2372 | /* If frame size has changed or the window is newly mapped, |
| 2373 | redisplay now, before we start to wait. There is a race |
| 2374 | condition here; if a SIGIO arrives between now and the select |
| 2375 | and indicates that a frame is trashed, the select may block |
| 2376 | displaying a trashed screen. */ |
| 2377 | if (frame_garbaged && do_display) |
| 2378 | { |
| 2379 | clear_waiting_for_input (); |
| 2380 | redisplay_preserve_echo_area (); |
| 2381 | if (XINT (read_kbd) < 0) |
| 2382 | set_waiting_for_input (&timeout); |
| 2383 | } |
| 2384 | |
| 2385 | if (XINT (read_kbd) && detect_input_pending ()) |
| 2386 | { |
| 2387 | nfds = 0; |
| 2388 | FD_ZERO (&Available); |
| 2389 | } |
| 2390 | else |
| 2391 | nfds = select (max (max_process_desc, max_keyboard_desc) + 1, |
| 2392 | &Available, (SELECT_TYPE *)0, (SELECT_TYPE *)0, |
| 2393 | &timeout); |
| 2394 | |
| 2395 | xerrno = errno; |
| 2396 | |
| 2397 | /* Make C-g and alarm signals set flags again */ |
| 2398 | clear_waiting_for_input (); |
| 2399 | |
| 2400 | /* If we woke up due to SIGWINCH, actually change size now. */ |
| 2401 | do_pending_window_change (); |
| 2402 | |
| 2403 | if (time_limit && nfds == 0 && ! timeout_reduced_for_timers) |
| 2404 | /* We wanted the full specified time, so return now. */ |
| 2405 | break; |
| 2406 | if (nfds < 0) |
| 2407 | { |
| 2408 | if (xerrno == EINTR) |
| 2409 | FD_ZERO (&Available); |
| 2410 | #ifdef ultrix |
| 2411 | /* Ultrix select seems to return ENOMEM when it is |
| 2412 | interrupted. Treat it just like EINTR. Bleah. Note |
| 2413 | that we want to test for the "ultrix" CPP symbol, not |
| 2414 | "__ultrix__"; the latter is only defined under GCC, but |
| 2415 | not by DEC's bundled CC. -JimB */ |
| 2416 | else if (xerrno == ENOMEM) |
| 2417 | FD_ZERO (&Available); |
| 2418 | #endif |
| 2419 | #ifdef ALLIANT |
| 2420 | /* This happens for no known reason on ALLIANT. |
| 2421 | I am guessing that this is the right response. -- RMS. */ |
| 2422 | else if (xerrno == EFAULT) |
| 2423 | FD_ZERO (&Available); |
| 2424 | #endif |
| 2425 | else if (xerrno == EBADF) |
| 2426 | { |
| 2427 | #ifdef AIX |
| 2428 | /* AIX doesn't handle PTY closure the same way BSD does. On AIX, |
| 2429 | the child's closure of the pts gives the parent a SIGHUP, and |
| 2430 | the ptc file descriptor is automatically closed, |
| 2431 | yielding EBADF here or at select() call above. |
| 2432 | So, SIGHUP is ignored (see def of PTY_TTY_NAME_SPRINTF |
| 2433 | in m/ibmrt-aix.h), and here we just ignore the select error. |
| 2434 | Cleanup occurs c/o status_notify after SIGCLD. */ |
| 2435 | FD_ZERO (&Available); /* Cannot depend on values returned */ |
| 2436 | #else |
| 2437 | abort (); |
| 2438 | #endif |
| 2439 | } |
| 2440 | else |
| 2441 | error ("select error: %s", strerror (xerrno)); |
| 2442 | } |
| 2443 | #if defined(sun) && !defined(USG5_4) |
| 2444 | else if (nfds > 0 && keyboard_bit_set (&Available) |
| 2445 | && interrupt_input) |
| 2446 | /* System sometimes fails to deliver SIGIO. |
| 2447 | |
| 2448 | David J. Mackenzie says that Emacs doesn't compile under |
| 2449 | Solaris if this code is enabled, thus the USG5_4 in the CPP |
| 2450 | conditional. "I haven't noticed any ill effects so far. |
| 2451 | If you find a Solaris expert somewhere, they might know |
| 2452 | better." */ |
| 2453 | kill (getpid (), SIGIO); |
| 2454 | #endif |
| 2455 | |
| 2456 | #if 0 /* When polling is used, interrupt_input is 0, |
| 2457 | so get_input_pending should read the input. |
| 2458 | So this should not be needed. */ |
| 2459 | /* If we are using polling for input, |
| 2460 | and we see input available, make it get read now. |
| 2461 | Otherwise it might not actually get read for a second. |
| 2462 | And on hpux, since we turn off polling in wait_reading_process_input, |
| 2463 | it might never get read at all if we don't spend much time |
| 2464 | outside of wait_reading_process_input. */ |
| 2465 | if (XINT (read_kbd) && interrupt_input |
| 2466 | && keyboard_bit_set (&Available) |
| 2467 | && input_polling_used ()) |
| 2468 | kill (getpid (), SIGALRM); |
| 2469 | #endif |
| 2470 | |
| 2471 | /* Check for keyboard input */ |
| 2472 | /* If there is any, return immediately |
| 2473 | to give it higher priority than subprocesses */ |
| 2474 | |
| 2475 | if (XINT (read_kbd) != 0 |
| 2476 | && detect_input_pending_run_timers (do_display)) |
| 2477 | { |
| 2478 | swallow_events (do_display); |
| 2479 | if (detect_input_pending_run_timers (do_display)) |
| 2480 | break; |
| 2481 | } |
| 2482 | |
| 2483 | /* If there is unread keyboard input, also return. */ |
| 2484 | if (XINT (read_kbd) != 0 |
| 2485 | && requeued_events_pending_p ()) |
| 2486 | break; |
| 2487 | |
| 2488 | /* If we are not checking for keyboard input now, |
| 2489 | do process events (but don't run any timers). |
| 2490 | This is so that X events will be processed. |
| 2491 | Otherwise they may have to wait until polling takes place. |
| 2492 | That would causes delays in pasting selections, for example. |
| 2493 | |
| 2494 | (We used to do this only if wait_for_cell.) */ |
| 2495 | if (XINT (read_kbd) == 0 && detect_input_pending ()) |
| 2496 | { |
| 2497 | swallow_events (do_display); |
| 2498 | #if 0 /* Exiting when read_kbd doesn't request that seems wrong, though. */ |
| 2499 | if (detect_input_pending ()) |
| 2500 | break; |
| 2501 | #endif |
| 2502 | } |
| 2503 | |
| 2504 | /* Exit now if the cell we're waiting for became non-nil. */ |
| 2505 | if (wait_for_cell && ! NILP (*wait_for_cell)) |
| 2506 | break; |
| 2507 | |
| 2508 | #ifdef SIGIO |
| 2509 | /* If we think we have keyboard input waiting, but didn't get SIGIO, |
| 2510 | go read it. This can happen with X on BSD after logging out. |
| 2511 | In that case, there really is no input and no SIGIO, |
| 2512 | but select says there is input. */ |
| 2513 | |
| 2514 | if (XINT (read_kbd) && interrupt_input |
| 2515 | && keyboard_bit_set (&Available)) |
| 2516 | kill (getpid (), SIGIO); |
| 2517 | #endif |
| 2518 | |
| 2519 | if (! wait_proc) |
| 2520 | got_some_input |= nfds > 0; |
| 2521 | |
| 2522 | /* If checking input just got us a size-change event from X, |
| 2523 | obey it now if we should. */ |
| 2524 | if (XINT (read_kbd) || wait_for_cell) |
| 2525 | do_pending_window_change (); |
| 2526 | |
| 2527 | /* Check for data from a process. */ |
| 2528 | /* Really FIRST_PROC_DESC should be 0 on Unix, |
| 2529 | but this is safer in the short run. */ |
| 2530 | for (channel = 0; channel <= max_process_desc; channel++) |
| 2531 | { |
| 2532 | if (FD_ISSET (channel, &Available) |
| 2533 | && FD_ISSET (channel, &non_keyboard_wait_mask)) |
| 2534 | { |
| 2535 | int nread; |
| 2536 | |
| 2537 | /* If waiting for this channel, arrange to return as |
| 2538 | soon as no more input to be processed. No more |
| 2539 | waiting. */ |
| 2540 | if (wait_channel == channel) |
| 2541 | { |
| 2542 | wait_channel = -1; |
| 2543 | time_limit = -1; |
| 2544 | got_some_input = 1; |
| 2545 | } |
| 2546 | proc = chan_process[channel]; |
| 2547 | if (NILP (proc)) |
| 2548 | continue; |
| 2549 | |
| 2550 | /* Read data from the process, starting with our |
| 2551 | buffered-ahead character if we have one. */ |
| 2552 | |
| 2553 | nread = read_process_output (proc, channel); |
| 2554 | if (nread > 0) |
| 2555 | { |
| 2556 | /* Since read_process_output can run a filter, |
| 2557 | which can call accept-process-output, |
| 2558 | don't try to read from any other processes |
| 2559 | before doing the select again. */ |
| 2560 | FD_ZERO (&Available); |
| 2561 | |
| 2562 | if (do_display) |
| 2563 | redisplay_preserve_echo_area (); |
| 2564 | } |
| 2565 | #ifdef EWOULDBLOCK |
| 2566 | else if (nread == -1 && errno == EWOULDBLOCK) |
| 2567 | ; |
| 2568 | #endif |
| 2569 | /* ISC 4.1 defines both EWOULDBLOCK and O_NONBLOCK, |
| 2570 | and Emacs uses O_NONBLOCK, so what we get is EAGAIN. */ |
| 2571 | #ifdef O_NONBLOCK |
| 2572 | else if (nread == -1 && errno == EAGAIN) |
| 2573 | ; |
| 2574 | #else |
| 2575 | #ifdef O_NDELAY |
| 2576 | else if (nread == -1 && errno == EAGAIN) |
| 2577 | ; |
| 2578 | /* Note that we cannot distinguish between no input |
| 2579 | available now and a closed pipe. |
| 2580 | With luck, a closed pipe will be accompanied by |
| 2581 | subprocess termination and SIGCHLD. */ |
| 2582 | else if (nread == 0 && !NETCONN_P (proc)) |
| 2583 | ; |
| 2584 | #endif /* O_NDELAY */ |
| 2585 | #endif /* O_NONBLOCK */ |
| 2586 | #ifdef HAVE_PTYS |
| 2587 | /* On some OSs with ptys, when the process on one end of |
| 2588 | a pty exits, the other end gets an error reading with |
| 2589 | errno = EIO instead of getting an EOF (0 bytes read). |
| 2590 | Therefore, if we get an error reading and errno = |
| 2591 | EIO, just continue, because the child process has |
| 2592 | exited and should clean itself up soon (e.g. when we |
| 2593 | get a SIGCHLD). */ |
| 2594 | else if (nread == -1 && errno == EIO) |
| 2595 | ; |
| 2596 | #endif /* HAVE_PTYS */ |
| 2597 | /* If we can detect process termination, don't consider the process |
| 2598 | gone just because its pipe is closed. */ |
| 2599 | #ifdef SIGCHLD |
| 2600 | else if (nread == 0 && !NETCONN_P (proc)) |
| 2601 | ; |
| 2602 | #endif |
| 2603 | else |
| 2604 | { |
| 2605 | /* Preserve status of processes already terminated. */ |
| 2606 | XSETINT (XPROCESS (proc)->tick, ++process_tick); |
| 2607 | deactivate_process (proc); |
| 2608 | if (!NILP (XPROCESS (proc)->raw_status_low)) |
| 2609 | update_status (XPROCESS (proc)); |
| 2610 | if (EQ (XPROCESS (proc)->status, Qrun)) |
| 2611 | XPROCESS (proc)->status |
| 2612 | = Fcons (Qexit, Fcons (make_number (256), Qnil)); |
| 2613 | } |
| 2614 | } |
| 2615 | } /* end for each file descriptor */ |
| 2616 | } /* end while exit conditions not met */ |
| 2617 | |
| 2618 | waiting_for_user_input_p = 0; |
| 2619 | |
| 2620 | /* If calling from keyboard input, do not quit |
| 2621 | since we want to return C-g as an input character. |
| 2622 | Otherwise, do pending quit if requested. */ |
| 2623 | if (XINT (read_kbd) >= 0) |
| 2624 | { |
| 2625 | /* Prevent input_pending from remaining set if we quit. */ |
| 2626 | clear_input_pending (); |
| 2627 | QUIT; |
| 2628 | } |
| 2629 | #ifdef hpux |
| 2630 | /* AlainF 5-Jul-1996 |
| 2631 | HP-UX 10.10 seems to have problems with signals coming in |
| 2632 | Causes "poll: interrupted system call" messages when Emacs is run |
| 2633 | in an X window |
| 2634 | Turn periodic alarms back on */ |
| 2635 | start_polling (); |
| 2636 | #endif |
| 2637 | |
| 2638 | return got_some_input; |
| 2639 | } |
| 2640 | \f |
| 2641 | /* Given a list (FUNCTION ARGS...), apply FUNCTION to the ARGS. */ |
| 2642 | |
| 2643 | static Lisp_Object |
| 2644 | read_process_output_call (fun_and_args) |
| 2645 | Lisp_Object fun_and_args; |
| 2646 | { |
| 2647 | return apply1 (XCONS (fun_and_args)->car, XCONS (fun_and_args)->cdr); |
| 2648 | } |
| 2649 | |
| 2650 | static Lisp_Object |
| 2651 | read_process_output_error_handler (error) |
| 2652 | Lisp_Object error; |
| 2653 | { |
| 2654 | cmd_error_internal (error, "error in process filter: "); |
| 2655 | Vinhibit_quit = Qt; |
| 2656 | update_echo_area (); |
| 2657 | Fsleep_for (make_number (2), Qnil); |
| 2658 | } |
| 2659 | |
| 2660 | /* Read pending output from the process channel, |
| 2661 | starting with our buffered-ahead character if we have one. |
| 2662 | Yield number of decoded characters read. |
| 2663 | |
| 2664 | This function reads at most 1024 characters. |
| 2665 | If you want to read all available subprocess output, |
| 2666 | you must call it repeatedly until it returns zero. |
| 2667 | |
| 2668 | The characters read are decoded according to PROC's coding-system |
| 2669 | for decoding. */ |
| 2670 | |
| 2671 | read_process_output (proc, channel) |
| 2672 | Lisp_Object proc; |
| 2673 | register int channel; |
| 2674 | { |
| 2675 | register int nchars; |
| 2676 | char *chars; |
| 2677 | #ifdef VMS |
| 2678 | int chars_allocated = 0; /* If 1, `chars' should be freed later. */ |
| 2679 | #else |
| 2680 | char buf[1024]; |
| 2681 | #endif |
| 2682 | register Lisp_Object outstream; |
| 2683 | register struct buffer *old = current_buffer; |
| 2684 | register struct Lisp_Process *p = XPROCESS (proc); |
| 2685 | register int opoint; |
| 2686 | struct coding_system *coding = proc_decode_coding_system[channel]; |
| 2687 | int chars_in_decoding_buf = 0; /* If 1, `chars' points |
| 2688 | XSTRING (p->decoding_buf)->data. */ |
| 2689 | |
| 2690 | #ifdef VMS |
| 2691 | VMS_PROC_STUFF *vs, *get_vms_process_pointer(); |
| 2692 | |
| 2693 | vs = get_vms_process_pointer (p->pid); |
| 2694 | if (vs) |
| 2695 | { |
| 2696 | if (!vs->iosb[0]) |
| 2697 | return(0); /* Really weird if it does this */ |
| 2698 | if (!(vs->iosb[0] & 1)) |
| 2699 | return -1; /* I/O error */ |
| 2700 | } |
| 2701 | else |
| 2702 | error ("Could not get VMS process pointer"); |
| 2703 | chars = vs->inputBuffer; |
| 2704 | nchars = clean_vms_buffer (chars, vs->iosb[1]); |
| 2705 | if (nchars <= 0) |
| 2706 | { |
| 2707 | start_vms_process_read (vs); /* Crank up the next read on the process */ |
| 2708 | return 1; /* Nothing worth printing, say we got 1 */ |
| 2709 | } |
| 2710 | if (coding->carryover_size) |
| 2711 | { |
| 2712 | /* The data carried over in the previous decoding should be |
| 2713 | prepended to the new data read to decode all together. */ |
| 2714 | char *buf = (char *) xmalloc (nchars + coding->carryover_size); |
| 2715 | |
| 2716 | bcopy (coding->carryover, buf, coding->carryover_size); |
| 2717 | bcopy (chars, buf + coding->carryover_size, nchars); |
| 2718 | chars = buf; |
| 2719 | chars_allocated = 1; |
| 2720 | } |
| 2721 | #else /* not VMS */ |
| 2722 | |
| 2723 | if (coding->carryover_size) |
| 2724 | /* The data carried over in the previous decoding should be |
| 2725 | prepended to the new data read to decode all together. */ |
| 2726 | bcopy (coding->carryover, buf, coding->carryover_size); |
| 2727 | |
| 2728 | if (proc_buffered_char[channel] < 0) |
| 2729 | nchars = read (channel, buf + coding->carryover_size, |
| 2730 | (sizeof buf) - coding->carryover_size); |
| 2731 | else |
| 2732 | { |
| 2733 | buf[coding->carryover_size] = proc_buffered_char[channel]; |
| 2734 | proc_buffered_char[channel] = -1; |
| 2735 | nchars = read (channel, buf + coding->carryover_size + 1, |
| 2736 | (sizeof buf) - coding->carryover_size - 1); |
| 2737 | if (nchars < 0) |
| 2738 | nchars = 1; |
| 2739 | else |
| 2740 | nchars = nchars + 1; |
| 2741 | } |
| 2742 | chars = buf; |
| 2743 | #endif /* not VMS */ |
| 2744 | |
| 2745 | /* At this point, NCHARS holds number of characters just received |
| 2746 | (including the one in proc_buffered_char[channel]). */ |
| 2747 | if (nchars <= 0) return nchars; |
| 2748 | |
| 2749 | /* Now set NCHARS how many bytes we must decode. */ |
| 2750 | nchars += coding->carryover_size; |
| 2751 | |
| 2752 | if (! CODING_REQUIRE_NO_CONVERSION (coding)) |
| 2753 | { |
| 2754 | int require = decoding_buffer_size (coding, nchars); |
| 2755 | int consumed, produced; |
| 2756 | |
| 2757 | if (XSTRING (p->decoding_buf)->size < require) |
| 2758 | p->decoding_buf = make_uninit_string (require); |
| 2759 | produced = decode_coding (coding, chars, XSTRING (p->decoding_buf)->data, |
| 2760 | nchars, XSTRING (p->decoding_buf)->size, |
| 2761 | &consumed); |
| 2762 | |
| 2763 | /* New coding-system might be found by `decode_coding'. */ |
| 2764 | if (!EQ (p->decode_coding_system, coding->symbol)) |
| 2765 | { |
| 2766 | p->decode_coding_system = coding->symbol; |
| 2767 | |
| 2768 | /* Don't call setup_coding_system for |
| 2769 | proc_decode_coding_system[channel] here. It is done in |
| 2770 | detect_coding called via decode_coding above. */ |
| 2771 | |
| 2772 | /* If coding-system for encoding is not yet decided, we set it |
| 2773 | as the same as coding-system for decoding. */ |
| 2774 | if (NILP (p->encode_coding_system)) |
| 2775 | { |
| 2776 | p->encode_coding_system = coding->symbol; |
| 2777 | setup_coding_system (coding->symbol, |
| 2778 | proc_encode_coding_system[channel]); |
| 2779 | } |
| 2780 | } |
| 2781 | #ifdef VMS |
| 2782 | /* Now we don't need the contents of `chars'. */ |
| 2783 | if (chars_allocated) |
| 2784 | free (chars); |
| 2785 | #endif |
| 2786 | if (produced == 0) |
| 2787 | return 0; |
| 2788 | chars = (char *) XSTRING (p->decoding_buf)->data; |
| 2789 | nchars = produced; |
| 2790 | chars_in_decoding_buf = 1; |
| 2791 | } |
| 2792 | #ifdef VMS |
| 2793 | else if (chars_allocated) |
| 2794 | { |
| 2795 | /* Although we don't have to decode the received data, we must |
| 2796 | move it to an area which we don't have to free. */ |
| 2797 | if (! STRINGP (p->decoding_buf) |
| 2798 | || XSTRING (p->decoding_buf)->size < nchars) |
| 2799 | p->decoding_buf = make_uninit_string (nchars); |
| 2800 | bcopy (chars, XSTRING (p->decoding_buf)->data, nchars); |
| 2801 | free (chars); |
| 2802 | chars = XSTRING (p->decoding_buf)->data; |
| 2803 | chars_in_decoding_buf = 1; |
| 2804 | } |
| 2805 | #endif |
| 2806 | |
| 2807 | outstream = p->filter; |
| 2808 | if (!NILP (outstream)) |
| 2809 | { |
| 2810 | /* We inhibit quit here instead of just catching it so that |
| 2811 | hitting ^G when a filter happens to be running won't screw |
| 2812 | it up. */ |
| 2813 | int count = specpdl_ptr - specpdl; |
| 2814 | Lisp_Object odeactivate; |
| 2815 | Lisp_Object obuffer, okeymap; |
| 2816 | int outer_running_asynch_code = running_asynch_code; |
| 2817 | |
| 2818 | /* No need to gcpro these, because all we do with them later |
| 2819 | is test them for EQness, and none of them should be a string. */ |
| 2820 | odeactivate = Vdeactivate_mark; |
| 2821 | XSETBUFFER (obuffer, current_buffer); |
| 2822 | okeymap = current_buffer->keymap; |
| 2823 | |
| 2824 | specbind (Qinhibit_quit, Qt); |
| 2825 | specbind (Qlast_nonmenu_event, Qt); |
| 2826 | |
| 2827 | /* In case we get recursively called, |
| 2828 | and we already saved the match data nonrecursively, |
| 2829 | save the same match data in safely recursive fashion. */ |
| 2830 | if (outer_running_asynch_code) |
| 2831 | { |
| 2832 | Lisp_Object tem; |
| 2833 | /* Don't clobber the CURRENT match data, either! */ |
| 2834 | tem = Fmatch_data (Qnil, Qnil); |
| 2835 | restore_match_data (); |
| 2836 | record_unwind_protect (Fstore_match_data, Fmatch_data (Qnil, Qnil)); |
| 2837 | Fstore_match_data (tem); |
| 2838 | } |
| 2839 | |
| 2840 | /* For speed, if a search happens within this code, |
| 2841 | save the match data in a special nonrecursive fashion. */ |
| 2842 | running_asynch_code = 1; |
| 2843 | |
| 2844 | /* Read and dispose of the process output. */ |
| 2845 | internal_condition_case_1 (read_process_output_call, |
| 2846 | Fcons (outstream, |
| 2847 | Fcons (proc, |
| 2848 | Fcons (make_string (chars, |
| 2849 | nchars), |
| 2850 | Qnil))), |
| 2851 | !NILP (Vdebug_on_error) ? Qnil : Qerror, |
| 2852 | read_process_output_error_handler); |
| 2853 | |
| 2854 | /* If we saved the match data nonrecursively, restore it now. */ |
| 2855 | restore_match_data (); |
| 2856 | running_asynch_code = outer_running_asynch_code; |
| 2857 | |
| 2858 | /* Handling the process output should not deactivate the mark. */ |
| 2859 | Vdeactivate_mark = odeactivate; |
| 2860 | |
| 2861 | #if 0 /* Call record_asynch_buffer_change unconditionally, |
| 2862 | because we might have changed minor modes or other things |
| 2863 | that affect key bindings. */ |
| 2864 | if (! EQ (Fcurrent_buffer (), obuffer) |
| 2865 | || ! EQ (current_buffer->keymap, okeymap)) |
| 2866 | #endif |
| 2867 | /* But do it only if the caller is actually going to read events. |
| 2868 | Otherwise there's no need to make him wake up, and it could |
| 2869 | cause trouble (for example it would make Fsit_for return). */ |
| 2870 | if (waiting_for_user_input_p == -1) |
| 2871 | record_asynch_buffer_change (); |
| 2872 | |
| 2873 | #ifdef VMS |
| 2874 | start_vms_process_read (vs); |
| 2875 | #endif |
| 2876 | unbind_to (count, Qnil); |
| 2877 | return nchars; |
| 2878 | } |
| 2879 | |
| 2880 | /* If no filter, write into buffer if it isn't dead. */ |
| 2881 | if (!NILP (p->buffer) && !NILP (XBUFFER (p->buffer)->name)) |
| 2882 | { |
| 2883 | Lisp_Object old_read_only; |
| 2884 | int old_begv, old_zv; |
| 2885 | Lisp_Object odeactivate; |
| 2886 | int before; |
| 2887 | |
| 2888 | odeactivate = Vdeactivate_mark; |
| 2889 | |
| 2890 | Fset_buffer (p->buffer); |
| 2891 | opoint = PT; |
| 2892 | old_read_only = current_buffer->read_only; |
| 2893 | old_begv = BEGV; |
| 2894 | old_zv = ZV; |
| 2895 | |
| 2896 | current_buffer->read_only = Qnil; |
| 2897 | |
| 2898 | /* Insert new output into buffer |
| 2899 | at the current end-of-output marker, |
| 2900 | thus preserving logical ordering of input and output. */ |
| 2901 | if (XMARKER (p->mark)->buffer) |
| 2902 | SET_PT (clip_to_bounds (BEGV, marker_position (p->mark), ZV)); |
| 2903 | else |
| 2904 | SET_PT (ZV); |
| 2905 | before = PT; |
| 2906 | |
| 2907 | /* If the output marker is outside of the visible region, save |
| 2908 | the restriction and widen. */ |
| 2909 | if (! (BEGV <= PT && PT <= ZV)) |
| 2910 | Fwiden (); |
| 2911 | |
| 2912 | /* Insert before markers in case we are inserting where |
| 2913 | the buffer's mark is, and the user's next command is Meta-y. */ |
| 2914 | if (chars_in_decoding_buf) |
| 2915 | insert_from_string_before_markers (p->decoding_buf, 0, nchars, 0); |
| 2916 | else |
| 2917 | insert_before_markers (chars, nchars); |
| 2918 | Fset_marker (p->mark, make_number (PT), p->buffer); |
| 2919 | |
| 2920 | update_mode_lines++; |
| 2921 | |
| 2922 | /* Make sure opoint and the old restrictions |
| 2923 | float ahead of any new text just as point would. */ |
| 2924 | if (opoint >= before) |
| 2925 | opoint += PT - before; |
| 2926 | if (old_begv > before) |
| 2927 | old_begv += PT - before; |
| 2928 | if (old_zv >= before) |
| 2929 | old_zv += PT - before; |
| 2930 | |
| 2931 | /* If the restriction isn't what it should be, set it. */ |
| 2932 | if (old_begv != BEGV || old_zv != ZV) |
| 2933 | Fnarrow_to_region (make_number (old_begv), make_number (old_zv)); |
| 2934 | |
| 2935 | /* Handling the process output should not deactivate the mark. */ |
| 2936 | Vdeactivate_mark = odeactivate; |
| 2937 | |
| 2938 | current_buffer->read_only = old_read_only; |
| 2939 | SET_PT (opoint); |
| 2940 | set_buffer_internal (old); |
| 2941 | } |
| 2942 | #ifdef VMS |
| 2943 | start_vms_process_read (vs); |
| 2944 | #endif |
| 2945 | return nchars; |
| 2946 | } |
| 2947 | |
| 2948 | DEFUN ("waiting-for-user-input-p", Fwaiting_for_user_input_p, Swaiting_for_user_input_p, |
| 2949 | 0, 0, 0, |
| 2950 | "Returns non-nil if emacs is waiting for input from the user.\n\ |
| 2951 | This is intended for use by asynchronous process output filters and sentinels.") |
| 2952 | () |
| 2953 | { |
| 2954 | return (waiting_for_user_input_p ? Qt : Qnil); |
| 2955 | } |
| 2956 | \f |
| 2957 | /* Sending data to subprocess */ |
| 2958 | |
| 2959 | jmp_buf send_process_frame; |
| 2960 | |
| 2961 | SIGTYPE |
| 2962 | send_process_trap () |
| 2963 | { |
| 2964 | #ifdef BSD4_1 |
| 2965 | sigrelse (SIGPIPE); |
| 2966 | sigrelse (SIGALRM); |
| 2967 | #endif /* BSD4_1 */ |
| 2968 | longjmp (send_process_frame, 1); |
| 2969 | } |
| 2970 | |
| 2971 | /* Send some data to process PROC. |
| 2972 | BUF is the beginning of the data; LEN is the number of characters. |
| 2973 | OBJECT is the Lisp object that the data comes from. |
| 2974 | |
| 2975 | The data is encoded by PROC's coding-system for encoding before it |
| 2976 | is sent. But if the data ends at the middle of multi-byte |
| 2977 | representation, that incomplete sequence of bytes are sent without |
| 2978 | being encoded. Should we store them in a buffer to prepend them to |
| 2979 | the data send later? */ |
| 2980 | |
| 2981 | send_process (proc, buf, len, object) |
| 2982 | volatile Lisp_Object proc; |
| 2983 | unsigned char *buf; |
| 2984 | int len; |
| 2985 | Lisp_Object object; |
| 2986 | { |
| 2987 | /* Use volatile to protect variables from being clobbered by longjmp. */ |
| 2988 | int rv; |
| 2989 | volatile unsigned char *procname = XSTRING (XPROCESS (proc)->name)->data; |
| 2990 | struct coding_system *coding; |
| 2991 | struct gcpro gcpro1; |
| 2992 | |
| 2993 | GCPRO1 (object); |
| 2994 | |
| 2995 | #ifdef VMS |
| 2996 | struct Lisp_Process *p = XPROCESS (proc); |
| 2997 | VMS_PROC_STUFF *vs, *get_vms_process_pointer(); |
| 2998 | #endif /* VMS */ |
| 2999 | |
| 3000 | if (! NILP (XPROCESS (proc)->raw_status_low)) |
| 3001 | update_status (XPROCESS (proc)); |
| 3002 | if (! EQ (XPROCESS (proc)->status, Qrun)) |
| 3003 | error ("Process %s not running", procname); |
| 3004 | if (XINT (XPROCESS (proc)->outfd) < 0) |
| 3005 | error ("Output file descriptor of %s is closed", procname); |
| 3006 | |
| 3007 | coding = proc_encode_coding_system[XINT (XPROCESS (proc)->outfd)]; |
| 3008 | if (! CODING_MAY_REQUIRE_NO_CONVERSION (coding)) |
| 3009 | { |
| 3010 | int require = encoding_buffer_size (coding, len); |
| 3011 | int offset, dummy; |
| 3012 | unsigned char *temp_buf = NULL; |
| 3013 | |
| 3014 | /* Remember the offset of data because a string or a buffer may |
| 3015 | be relocated. Setting OFFSET to -1 means we don't have to |
| 3016 | care relocation. */ |
| 3017 | offset = (BUFFERP (object) |
| 3018 | ? BUF_PTR_CHAR_POS (XBUFFER (object), buf) |
| 3019 | : (STRINGP (object) |
| 3020 | ? offset = buf - XSTRING (object)->data |
| 3021 | : -1)); |
| 3022 | |
| 3023 | if (coding->carryover_size > 0) |
| 3024 | { |
| 3025 | temp_buf = (unsigned char *) xmalloc (len + coding->carryover_size); |
| 3026 | |
| 3027 | if (offset >= 0) |
| 3028 | { |
| 3029 | if (BUFFERP (object)) |
| 3030 | buf = BUF_CHAR_ADDRESS (XBUFFER (object), offset); |
| 3031 | else if (STRINGP (object)) |
| 3032 | buf = offset + XSTRING (object)->data; |
| 3033 | /* Now we don't have to care relocation. */ |
| 3034 | offset = -1; |
| 3035 | } |
| 3036 | bcopy (coding->carryover, temp_buf, coding->carryover_size); |
| 3037 | bcopy (buf, temp_buf + coding->carryover_size, len); |
| 3038 | buf = temp_buf; |
| 3039 | } |
| 3040 | |
| 3041 | if (XSTRING (XPROCESS (proc)->encoding_buf)->size < require) |
| 3042 | { |
| 3043 | XPROCESS (proc)->encoding_buf = make_uninit_string (require); |
| 3044 | |
| 3045 | if (offset >= 0) |
| 3046 | { |
| 3047 | if (BUFFERP (object)) |
| 3048 | buf = BUF_CHAR_ADDRESS (XBUFFER (object), offset); |
| 3049 | else if (STRINGP (object)) |
| 3050 | buf = offset + XSTRING (object)->data; |
| 3051 | } |
| 3052 | } |
| 3053 | object = XPROCESS (proc)->encoding_buf; |
| 3054 | len = encode_coding (coding, buf, XSTRING (object)->data, |
| 3055 | len, XSTRING (object)->size, &dummy); |
| 3056 | buf = XSTRING (object)->data; |
| 3057 | if (temp_buf) |
| 3058 | xfree (temp_buf); |
| 3059 | } |
| 3060 | |
| 3061 | #ifdef VMS |
| 3062 | vs = get_vms_process_pointer (p->pid); |
| 3063 | if (vs == 0) |
| 3064 | error ("Could not find this process: %x", p->pid); |
| 3065 | else if (write_to_vms_process (vs, buf, len)) |
| 3066 | ; |
| 3067 | #else |
| 3068 | |
| 3069 | if (pty_max_bytes == 0) |
| 3070 | { |
| 3071 | #if defined (HAVE_FPATHCONF) && defined (_PC_MAX_CANON) |
| 3072 | pty_max_bytes = fpathconf (XFASTINT (XPROCESS (proc)->outfd), |
| 3073 | _PC_MAX_CANON); |
| 3074 | if (pty_max_bytes < 0) |
| 3075 | pty_max_bytes = 250; |
| 3076 | #else |
| 3077 | pty_max_bytes = 250; |
| 3078 | #endif |
| 3079 | /* Deduct one, to leave space for the eof. */ |
| 3080 | pty_max_bytes--; |
| 3081 | } |
| 3082 | |
| 3083 | if (!setjmp (send_process_frame)) |
| 3084 | while (len > 0) |
| 3085 | { |
| 3086 | int this = len; |
| 3087 | SIGTYPE (*old_sigpipe)(); |
| 3088 | int flush_pty = 0; |
| 3089 | |
| 3090 | /* Decide how much data we can send in one batch. |
| 3091 | Long lines need to be split into multiple batches. */ |
| 3092 | if (!NILP (XPROCESS (proc)->pty_flag)) |
| 3093 | { |
| 3094 | /* Starting this at zero is always correct when not the first iteration |
| 3095 | because the previous iteration ended by sending C-d. |
| 3096 | It may not be correct for the first iteration |
| 3097 | if a partial line was sent in a separate send_process call. |
| 3098 | If that proves worth handling, we need to save linepos |
| 3099 | in the process object. */ |
| 3100 | int linepos = 0; |
| 3101 | unsigned char *ptr = buf; |
| 3102 | unsigned char *end = buf + len; |
| 3103 | |
| 3104 | /* Scan through this text for a line that is too long. */ |
| 3105 | while (ptr != end && linepos < pty_max_bytes) |
| 3106 | { |
| 3107 | if (*ptr == '\n') |
| 3108 | linepos = 0; |
| 3109 | else |
| 3110 | linepos++; |
| 3111 | ptr++; |
| 3112 | } |
| 3113 | /* If we found one, break the line there |
| 3114 | and put in a C-d to force the buffer through. */ |
| 3115 | this = ptr - buf; |
| 3116 | } |
| 3117 | |
| 3118 | /* Send this batch, using one or more write calls. */ |
| 3119 | while (this > 0) |
| 3120 | { |
| 3121 | old_sigpipe = (SIGTYPE (*) ()) signal (SIGPIPE, send_process_trap); |
| 3122 | rv = write (XINT (XPROCESS (proc)->outfd), buf, this); |
| 3123 | signal (SIGPIPE, old_sigpipe); |
| 3124 | |
| 3125 | if (rv < 0) |
| 3126 | { |
| 3127 | if (0 |
| 3128 | #ifdef EWOULDBLOCK |
| 3129 | || errno == EWOULDBLOCK |
| 3130 | #endif |
| 3131 | #ifdef EAGAIN |
| 3132 | || errno == EAGAIN |
| 3133 | #endif |
| 3134 | ) |
| 3135 | /* Buffer is full. Wait, accepting input; |
| 3136 | that may allow the program |
| 3137 | to finish doing output and read more. */ |
| 3138 | { |
| 3139 | Lisp_Object zero; |
| 3140 | int offset; |
| 3141 | |
| 3142 | /* Running filters might relocate buffers or strings. |
| 3143 | Arrange to relocate BUF. */ |
| 3144 | if (BUFFERP (object)) |
| 3145 | offset = BUF_PTR_CHAR_POS (XBUFFER (object), buf); |
| 3146 | else if (STRINGP (object)) |
| 3147 | offset = buf - XSTRING (object)->data; |
| 3148 | |
| 3149 | XSETFASTINT (zero, 0); |
| 3150 | #ifdef EMACS_HAS_USECS |
| 3151 | wait_reading_process_input (0, 20000, zero, 0); |
| 3152 | #else |
| 3153 | wait_reading_process_input (1, 0, zero, 0); |
| 3154 | #endif |
| 3155 | |
| 3156 | if (BUFFERP (object)) |
| 3157 | buf = BUF_CHAR_ADDRESS (XBUFFER (object), offset); |
| 3158 | else if (STRINGP (object)) |
| 3159 | buf = offset + XSTRING (object)->data; |
| 3160 | |
| 3161 | rv = 0; |
| 3162 | } |
| 3163 | else |
| 3164 | /* This is a real error. */ |
| 3165 | report_file_error ("writing to process", Fcons (proc, Qnil)); |
| 3166 | } |
| 3167 | buf += rv; |
| 3168 | len -= rv; |
| 3169 | this -= rv; |
| 3170 | } |
| 3171 | |
| 3172 | /* If we sent just part of the string, put in an EOF |
| 3173 | to force it through, before we send the rest. */ |
| 3174 | if (len > 0) |
| 3175 | Fprocess_send_eof (proc); |
| 3176 | } |
| 3177 | #endif |
| 3178 | else |
| 3179 | { |
| 3180 | XPROCESS (proc)->raw_status_low = Qnil; |
| 3181 | XPROCESS (proc)->raw_status_high = Qnil; |
| 3182 | XPROCESS (proc)->status = Fcons (Qexit, Fcons (make_number (256), Qnil)); |
| 3183 | XSETINT (XPROCESS (proc)->tick, ++process_tick); |
| 3184 | deactivate_process (proc); |
| 3185 | #ifdef VMS |
| 3186 | error ("Error writing to process %s; closed it", procname); |
| 3187 | #else |
| 3188 | error ("SIGPIPE raised on process %s; closed it", procname); |
| 3189 | #endif |
| 3190 | } |
| 3191 | |
| 3192 | UNGCPRO; |
| 3193 | } |
| 3194 | |
| 3195 | DEFUN ("process-send-region", Fprocess_send_region, Sprocess_send_region, |
| 3196 | 3, 3, 0, |
| 3197 | "Send current contents of region as input to PROCESS.\n\ |
| 3198 | PROCESS may be a process, a buffer, the name of a process or buffer, or\n\ |
| 3199 | nil, indicating the current buffer's process.\n\ |
| 3200 | Called from program, takes three arguments, PROCESS, START and END.\n\ |
| 3201 | If the region is more than 500 characters long,\n\ |
| 3202 | it is sent in several bunches. This may happen even for shorter regions.\n\ |
| 3203 | Output from processes can arrive in between bunches.") |
| 3204 | (process, start, end) |
| 3205 | Lisp_Object process, start, end; |
| 3206 | { |
| 3207 | Lisp_Object proc; |
| 3208 | int start1; |
| 3209 | |
| 3210 | proc = get_process (process); |
| 3211 | validate_region (&start, &end); |
| 3212 | |
| 3213 | if (XINT (start) < GPT && XINT (end) > GPT) |
| 3214 | move_gap (XINT (start)); |
| 3215 | |
| 3216 | start1 = XINT (start); |
| 3217 | send_process (proc, POS_ADDR (start1), XINT (end) - XINT (start), |
| 3218 | Fcurrent_buffer ()); |
| 3219 | |
| 3220 | return Qnil; |
| 3221 | } |
| 3222 | |
| 3223 | DEFUN ("process-send-string", Fprocess_send_string, Sprocess_send_string, |
| 3224 | 2, 2, 0, |
| 3225 | "Send PROCESS the contents of STRING as input.\n\ |
| 3226 | PROCESS may be a process, a buffer, the name of a process or buffer, or\n\ |
| 3227 | nil, indicating the current buffer's process.\n\ |
| 3228 | If STRING is more than 500 characters long,\n\ |
| 3229 | it is sent in several bunches. This may happen even for shorter strings.\n\ |
| 3230 | Output from processes can arrive in between bunches.") |
| 3231 | (process, string) |
| 3232 | Lisp_Object process, string; |
| 3233 | { |
| 3234 | Lisp_Object proc; |
| 3235 | CHECK_STRING (string, 1); |
| 3236 | proc = get_process (process); |
| 3237 | send_process (proc, XSTRING (string)->data, XSTRING (string)->size, string); |
| 3238 | return Qnil; |
| 3239 | } |
| 3240 | \f |
| 3241 | /* send a signal number SIGNO to PROCESS. |
| 3242 | CURRENT_GROUP means send to the process group that currently owns |
| 3243 | the terminal being used to communicate with PROCESS. |
| 3244 | This is used for various commands in shell mode. |
| 3245 | If NOMSG is zero, insert signal-announcements into process's buffers |
| 3246 | right away. |
| 3247 | |
| 3248 | If we can, we try to signal PROCESS by sending control characters |
| 3249 | down the pty. This allows us to signal inferiors who have changed |
| 3250 | their uid, for which killpg would return an EPERM error. */ |
| 3251 | |
| 3252 | static void |
| 3253 | process_send_signal (process, signo, current_group, nomsg) |
| 3254 | Lisp_Object process; |
| 3255 | int signo; |
| 3256 | Lisp_Object current_group; |
| 3257 | int nomsg; |
| 3258 | { |
| 3259 | Lisp_Object proc; |
| 3260 | register struct Lisp_Process *p; |
| 3261 | int gid; |
| 3262 | int no_pgrp = 0; |
| 3263 | |
| 3264 | proc = get_process (process); |
| 3265 | p = XPROCESS (proc); |
| 3266 | |
| 3267 | if (!EQ (p->childp, Qt)) |
| 3268 | error ("Process %s is not a subprocess", |
| 3269 | XSTRING (p->name)->data); |
| 3270 | if (XINT (p->infd) < 0) |
| 3271 | error ("Process %s is not active", |
| 3272 | XSTRING (p->name)->data); |
| 3273 | |
| 3274 | if (NILP (p->pty_flag)) |
| 3275 | current_group = Qnil; |
| 3276 | |
| 3277 | /* If we are using pgrps, get a pgrp number and make it negative. */ |
| 3278 | if (!NILP (current_group)) |
| 3279 | { |
| 3280 | #ifdef SIGNALS_VIA_CHARACTERS |
| 3281 | /* If possible, send signals to the entire pgrp |
| 3282 | by sending an input character to it. */ |
| 3283 | |
| 3284 | /* TERMIOS is the latest and bestest, and seems most likely to |
| 3285 | work. If the system has it, use it. */ |
| 3286 | #ifdef HAVE_TERMIOS |
| 3287 | struct termios t; |
| 3288 | |
| 3289 | switch (signo) |
| 3290 | { |
| 3291 | case SIGINT: |
| 3292 | tcgetattr (XINT (p->infd), &t); |
| 3293 | send_process (proc, &t.c_cc[VINTR], 1, Qnil); |
| 3294 | return; |
| 3295 | |
| 3296 | case SIGQUIT: |
| 3297 | tcgetattr (XINT (p->infd), &t); |
| 3298 | send_process (proc, &t.c_cc[VQUIT], 1, Qnil); |
| 3299 | return; |
| 3300 | |
| 3301 | case SIGTSTP: |
| 3302 | tcgetattr (XINT (p->infd), &t); |
| 3303 | #if defined (VSWTCH) && !defined (PREFER_VSUSP) |
| 3304 | send_process (proc, &t.c_cc[VSWTCH], 1, Qnil); |
| 3305 | #else |
| 3306 | send_process (proc, &t.c_cc[VSUSP], 1, Qnil); |
| 3307 | #endif |
| 3308 | return; |
| 3309 | } |
| 3310 | |
| 3311 | #else /* ! HAVE_TERMIOS */ |
| 3312 | |
| 3313 | /* On Berkeley descendants, the following IOCTL's retrieve the |
| 3314 | current control characters. */ |
| 3315 | #if defined (TIOCGLTC) && defined (TIOCGETC) |
| 3316 | |
| 3317 | struct tchars c; |
| 3318 | struct ltchars lc; |
| 3319 | |
| 3320 | switch (signo) |
| 3321 | { |
| 3322 | case SIGINT: |
| 3323 | ioctl (XINT (p->infd), TIOCGETC, &c); |
| 3324 | send_process (proc, &c.t_intrc, 1, Qnil); |
| 3325 | return; |
| 3326 | case SIGQUIT: |
| 3327 | ioctl (XINT (p->infd), TIOCGETC, &c); |
| 3328 | send_process (proc, &c.t_quitc, 1, Qnil); |
| 3329 | return; |
| 3330 | #ifdef SIGTSTP |
| 3331 | case SIGTSTP: |
| 3332 | ioctl (XINT (p->infd), TIOCGLTC, &lc); |
| 3333 | send_process (proc, &lc.t_suspc, 1, Qnil); |
| 3334 | return; |
| 3335 | #endif /* ! defined (SIGTSTP) */ |
| 3336 | } |
| 3337 | |
| 3338 | #else /* ! defined (TIOCGLTC) && defined (TIOCGETC) */ |
| 3339 | |
| 3340 | /* On SYSV descendants, the TCGETA ioctl retrieves the current control |
| 3341 | characters. */ |
| 3342 | #ifdef TCGETA |
| 3343 | struct termio t; |
| 3344 | switch (signo) |
| 3345 | { |
| 3346 | case SIGINT: |
| 3347 | ioctl (XINT (p->infd), TCGETA, &t); |
| 3348 | send_process (proc, &t.c_cc[VINTR], 1, Qnil); |
| 3349 | return; |
| 3350 | case SIGQUIT: |
| 3351 | ioctl (XINT (p->infd), TCGETA, &t); |
| 3352 | send_process (proc, &t.c_cc[VQUIT], 1, Qnil); |
| 3353 | return; |
| 3354 | #ifdef SIGTSTP |
| 3355 | case SIGTSTP: |
| 3356 | ioctl (XINT (p->infd), TCGETA, &t); |
| 3357 | send_process (proc, &t.c_cc[VSWTCH], 1, Qnil); |
| 3358 | return; |
| 3359 | #endif /* ! defined (SIGTSTP) */ |
| 3360 | } |
| 3361 | #else /* ! defined (TCGETA) */ |
| 3362 | Your configuration files are messed up. |
| 3363 | /* If your system configuration files define SIGNALS_VIA_CHARACTERS, |
| 3364 | you'd better be using one of the alternatives above! */ |
| 3365 | #endif /* ! defined (TCGETA) */ |
| 3366 | #endif /* ! defined (TIOCGLTC) && defined (TIOCGETC) */ |
| 3367 | #endif /* ! defined HAVE_TERMIOS */ |
| 3368 | #endif /* ! defined (SIGNALS_VIA_CHARACTERS) */ |
| 3369 | |
| 3370 | #ifdef TIOCGPGRP |
| 3371 | /* Get the pgrp using the tty itself, if we have that. |
| 3372 | Otherwise, use the pty to get the pgrp. |
| 3373 | On pfa systems, saka@pfu.fujitsu.co.JP writes: |
| 3374 | "TIOCGPGRP symbol defined in sys/ioctl.h at E50. |
| 3375 | But, TIOCGPGRP does not work on E50 ;-P works fine on E60" |
| 3376 | His patch indicates that if TIOCGPGRP returns an error, then |
| 3377 | we should just assume that p->pid is also the process group id. */ |
| 3378 | { |
| 3379 | int err; |
| 3380 | |
| 3381 | if (!NILP (p->subtty)) |
| 3382 | err = ioctl (XFASTINT (p->subtty), TIOCGPGRP, &gid); |
| 3383 | else |
| 3384 | err = ioctl (XINT (p->infd), TIOCGPGRP, &gid); |
| 3385 | |
| 3386 | #ifdef pfa |
| 3387 | if (err == -1) |
| 3388 | gid = - XFASTINT (p->pid); |
| 3389 | #endif /* ! defined (pfa) */ |
| 3390 | } |
| 3391 | if (gid == -1) |
| 3392 | no_pgrp = 1; |
| 3393 | else |
| 3394 | gid = - gid; |
| 3395 | #else /* ! defined (TIOCGPGRP ) */ |
| 3396 | /* Can't select pgrps on this system, so we know that |
| 3397 | the child itself heads the pgrp. */ |
| 3398 | gid = - XFASTINT (p->pid); |
| 3399 | #endif /* ! defined (TIOCGPGRP ) */ |
| 3400 | } |
| 3401 | else |
| 3402 | gid = - XFASTINT (p->pid); |
| 3403 | |
| 3404 | switch (signo) |
| 3405 | { |
| 3406 | #ifdef SIGCONT |
| 3407 | case SIGCONT: |
| 3408 | p->raw_status_low = Qnil; |
| 3409 | p->raw_status_high = Qnil; |
| 3410 | p->status = Qrun; |
| 3411 | XSETINT (p->tick, ++process_tick); |
| 3412 | if (!nomsg) |
| 3413 | status_notify (); |
| 3414 | break; |
| 3415 | #endif /* ! defined (SIGCONT) */ |
| 3416 | case SIGINT: |
| 3417 | #ifdef VMS |
| 3418 | send_process (proc, "\003", 1, Qnil); /* ^C */ |
| 3419 | goto whoosh; |
| 3420 | #endif |
| 3421 | case SIGQUIT: |
| 3422 | #ifdef VMS |
| 3423 | send_process (proc, "\031", 1, Qnil); /* ^Y */ |
| 3424 | goto whoosh; |
| 3425 | #endif |
| 3426 | case SIGKILL: |
| 3427 | #ifdef VMS |
| 3428 | sys$forcex (&(XFASTINT (p->pid)), 0, 1); |
| 3429 | whoosh: |
| 3430 | #endif |
| 3431 | flush_pending_output (XINT (p->infd)); |
| 3432 | break; |
| 3433 | } |
| 3434 | |
| 3435 | /* If we don't have process groups, send the signal to the immediate |
| 3436 | subprocess. That isn't really right, but it's better than any |
| 3437 | obvious alternative. */ |
| 3438 | if (no_pgrp) |
| 3439 | { |
| 3440 | kill (XFASTINT (p->pid), signo); |
| 3441 | return; |
| 3442 | } |
| 3443 | |
| 3444 | /* gid may be a pid, or minus a pgrp's number */ |
| 3445 | #ifdef TIOCSIGSEND |
| 3446 | if (!NILP (current_group)) |
| 3447 | ioctl (XINT (p->infd), TIOCSIGSEND, signo); |
| 3448 | else |
| 3449 | { |
| 3450 | gid = - XFASTINT (p->pid); |
| 3451 | kill (gid, signo); |
| 3452 | } |
| 3453 | #else /* ! defined (TIOCSIGSEND) */ |
| 3454 | EMACS_KILLPG (-gid, signo); |
| 3455 | #endif /* ! defined (TIOCSIGSEND) */ |
| 3456 | } |
| 3457 | |
| 3458 | DEFUN ("interrupt-process", Finterrupt_process, Sinterrupt_process, 0, 2, 0, |
| 3459 | "Interrupt process PROCESS. May be process or name of one.\n\ |
| 3460 | PROCESS may be a process, a buffer, or the name of a process or buffer.\n\ |
| 3461 | nil or no arg means current buffer's process.\n\ |
| 3462 | Second arg CURRENT-GROUP non-nil means send signal to\n\ |
| 3463 | the current process-group of the process's controlling terminal\n\ |
| 3464 | rather than to the process's own process group.\n\ |
| 3465 | If the process is a shell, this means interrupt current subjob\n\ |
| 3466 | rather than the shell.") |
| 3467 | (process, current_group) |
| 3468 | Lisp_Object process, current_group; |
| 3469 | { |
| 3470 | process_send_signal (process, SIGINT, current_group, 0); |
| 3471 | return process; |
| 3472 | } |
| 3473 | |
| 3474 | DEFUN ("kill-process", Fkill_process, Skill_process, 0, 2, 0, |
| 3475 | "Kill process PROCESS. May be process or name of one.\n\ |
| 3476 | See function `interrupt-process' for more details on usage.") |
| 3477 | (process, current_group) |
| 3478 | Lisp_Object process, current_group; |
| 3479 | { |
| 3480 | process_send_signal (process, SIGKILL, current_group, 0); |
| 3481 | return process; |
| 3482 | } |
| 3483 | |
| 3484 | DEFUN ("quit-process", Fquit_process, Squit_process, 0, 2, 0, |
| 3485 | "Send QUIT signal to process PROCESS. May be process or name of one.\n\ |
| 3486 | See function `interrupt-process' for more details on usage.") |
| 3487 | (process, current_group) |
| 3488 | Lisp_Object process, current_group; |
| 3489 | { |
| 3490 | process_send_signal (process, SIGQUIT, current_group, 0); |
| 3491 | return process; |
| 3492 | } |
| 3493 | |
| 3494 | DEFUN ("stop-process", Fstop_process, Sstop_process, 0, 2, 0, |
| 3495 | "Stop process PROCESS. May be process or name of one.\n\ |
| 3496 | See function `interrupt-process' for more details on usage.") |
| 3497 | (process, current_group) |
| 3498 | Lisp_Object process, current_group; |
| 3499 | { |
| 3500 | #ifndef SIGTSTP |
| 3501 | error ("no SIGTSTP support"); |
| 3502 | #else |
| 3503 | process_send_signal (process, SIGTSTP, current_group, 0); |
| 3504 | #endif |
| 3505 | return process; |
| 3506 | } |
| 3507 | |
| 3508 | DEFUN ("continue-process", Fcontinue_process, Scontinue_process, 0, 2, 0, |
| 3509 | "Continue process PROCESS. May be process or name of one.\n\ |
| 3510 | See function `interrupt-process' for more details on usage.") |
| 3511 | (process, current_group) |
| 3512 | Lisp_Object process, current_group; |
| 3513 | { |
| 3514 | #ifdef SIGCONT |
| 3515 | process_send_signal (process, SIGCONT, current_group, 0); |
| 3516 | #else |
| 3517 | error ("no SIGCONT support"); |
| 3518 | #endif |
| 3519 | return process; |
| 3520 | } |
| 3521 | |
| 3522 | DEFUN ("signal-process", Fsignal_process, Ssignal_process, |
| 3523 | 2, 2, "nProcess number: \nnSignal code: ", |
| 3524 | "Send the process with process id PID the signal with code SIGCODE.\n\ |
| 3525 | PID must be an integer. The process need not be a child of this Emacs.\n\ |
| 3526 | SIGCODE may be an integer, or a symbol whose name is a signal name.") |
| 3527 | (pid, sigcode) |
| 3528 | Lisp_Object pid, sigcode; |
| 3529 | { |
| 3530 | CHECK_NUMBER (pid, 0); |
| 3531 | |
| 3532 | #define handle_signal(NAME, VALUE) \ |
| 3533 | else if (!strcmp (name, NAME)) \ |
| 3534 | XSETINT (sigcode, VALUE) |
| 3535 | |
| 3536 | if (INTEGERP (sigcode)) |
| 3537 | ; |
| 3538 | else |
| 3539 | { |
| 3540 | unsigned char *name; |
| 3541 | |
| 3542 | CHECK_SYMBOL (sigcode, 1); |
| 3543 | name = XSYMBOL (sigcode)->name->data; |
| 3544 | |
| 3545 | if (0) |
| 3546 | ; |
| 3547 | #ifdef SIGHUP |
| 3548 | handle_signal ("SIGHUP", SIGHUP); |
| 3549 | #endif |
| 3550 | #ifdef SIGINT |
| 3551 | handle_signal ("SIGINT", SIGINT); |
| 3552 | #endif |
| 3553 | #ifdef SIGQUIT |
| 3554 | handle_signal ("SIGQUIT", SIGQUIT); |
| 3555 | #endif |
| 3556 | #ifdef SIGILL |
| 3557 | handle_signal ("SIGILL", SIGILL); |
| 3558 | #endif |
| 3559 | #ifdef SIGABRT |
| 3560 | handle_signal ("SIGABRT", SIGABRT); |
| 3561 | #endif |
| 3562 | #ifdef SIGEMT |
| 3563 | handle_signal ("SIGEMT", SIGEMT); |
| 3564 | #endif |
| 3565 | #ifdef SIGKILL |
| 3566 | handle_signal ("SIGKILL", SIGKILL); |
| 3567 | #endif |
| 3568 | #ifdef SIGFPE |
| 3569 | handle_signal ("SIGFPE", SIGFPE); |
| 3570 | #endif |
| 3571 | #ifdef SIGBUS |
| 3572 | handle_signal ("SIGBUS", SIGBUS); |
| 3573 | #endif |
| 3574 | #ifdef SIGSEGV |
| 3575 | handle_signal ("SIGSEGV", SIGSEGV); |
| 3576 | #endif |
| 3577 | #ifdef SIGSYS |
| 3578 | handle_signal ("SIGSYS", SIGSYS); |
| 3579 | #endif |
| 3580 | #ifdef SIGPIPE |
| 3581 | handle_signal ("SIGPIPE", SIGPIPE); |
| 3582 | #endif |
| 3583 | #ifdef SIGALRM |
| 3584 | handle_signal ("SIGALRM", SIGALRM); |
| 3585 | #endif |
| 3586 | #ifdef SIGTERM |
| 3587 | handle_signal ("SIGTERM", SIGTERM); |
| 3588 | #endif |
| 3589 | #ifdef SIGURG |
| 3590 | handle_signal ("SIGURG", SIGURG); |
| 3591 | #endif |
| 3592 | #ifdef SIGSTOP |
| 3593 | handle_signal ("SIGSTOP", SIGSTOP); |
| 3594 | #endif |
| 3595 | #ifdef SIGTSTP |
| 3596 | handle_signal ("SIGTSTP", SIGTSTP); |
| 3597 | #endif |
| 3598 | #ifdef SIGCONT |
| 3599 | handle_signal ("SIGCONT", SIGCONT); |
| 3600 | #endif |
| 3601 | #ifdef SIGCHLD |
| 3602 | handle_signal ("SIGCHLD", SIGCHLD); |
| 3603 | #endif |
| 3604 | #ifdef SIGTTIN |
| 3605 | handle_signal ("SIGTTIN", SIGTTIN); |
| 3606 | #endif |
| 3607 | #ifdef SIGTTOU |
| 3608 | handle_signal ("SIGTTOU", SIGTTOU); |
| 3609 | #endif |
| 3610 | #ifdef SIGIO |
| 3611 | handle_signal ("SIGIO", SIGIO); |
| 3612 | #endif |
| 3613 | #ifdef SIGXCPU |
| 3614 | handle_signal ("SIGXCPU", SIGXCPU); |
| 3615 | #endif |
| 3616 | #ifdef SIGXFSZ |
| 3617 | handle_signal ("SIGXFSZ", SIGXFSZ); |
| 3618 | #endif |
| 3619 | #ifdef SIGVTALRM |
| 3620 | handle_signal ("SIGVTALRM", SIGVTALRM); |
| 3621 | #endif |
| 3622 | #ifdef SIGPROF |
| 3623 | handle_signal ("SIGPROF", SIGPROF); |
| 3624 | #endif |
| 3625 | #ifdef SIGWINCH |
| 3626 | handle_signal ("SIGWINCH", SIGWINCH); |
| 3627 | #endif |
| 3628 | #ifdef SIGINFO |
| 3629 | handle_signal ("SIGINFO", SIGINFO); |
| 3630 | #endif |
| 3631 | #ifdef SIGUSR1 |
| 3632 | handle_signal ("SIGUSR1", SIGUSR1); |
| 3633 | #endif |
| 3634 | #ifdef SIGUSR2 |
| 3635 | handle_signal ("SIGUSR2", SIGUSR2); |
| 3636 | #endif |
| 3637 | else |
| 3638 | error ("Undefined signal name %s", name); |
| 3639 | } |
| 3640 | |
| 3641 | #undef handle_signal |
| 3642 | |
| 3643 | return make_number (kill (XINT (pid), XINT (sigcode))); |
| 3644 | } |
| 3645 | |
| 3646 | DEFUN ("process-send-eof", Fprocess_send_eof, Sprocess_send_eof, 0, 1, 0, |
| 3647 | "Make PROCESS see end-of-file in its input.\n\ |
| 3648 | Eof comes after any text already sent to it.\n\ |
| 3649 | PROCESS may be a process, a buffer, the name of a process or buffer, or\n\ |
| 3650 | nil, indicating the current buffer's process.\n\ |
| 3651 | If PROCESS is a network connection, or is a process communicating\n\ |
| 3652 | through a pipe (as opposed to a pty), then you cannot send any more\n\ |
| 3653 | text to PROCESS after you call this function.") |
| 3654 | (process) |
| 3655 | Lisp_Object process; |
| 3656 | { |
| 3657 | Lisp_Object proc; |
| 3658 | |
| 3659 | proc = get_process (process); |
| 3660 | |
| 3661 | /* Make sure the process is really alive. */ |
| 3662 | if (! NILP (XPROCESS (proc)->raw_status_low)) |
| 3663 | update_status (XPROCESS (proc)); |
| 3664 | if (! EQ (XPROCESS (proc)->status, Qrun)) |
| 3665 | error ("Process %s not running", XSTRING (XPROCESS (proc)->name)->data); |
| 3666 | |
| 3667 | #ifdef VMS |
| 3668 | send_process (proc, "\032", 1, Qnil); /* ^z */ |
| 3669 | #else |
| 3670 | if (!NILP (XPROCESS (proc)->pty_flag)) |
| 3671 | send_process (proc, "\004", 1, Qnil); |
| 3672 | else |
| 3673 | { |
| 3674 | #ifdef HAVE_SHUTDOWN |
| 3675 | /* If this is a network connection, or socketpair is used |
| 3676 | for communication with the subprocess, call shutdown to cause EOF. |
| 3677 | (In some old system, shutdown to socketpair doesn't work. |
| 3678 | Then we just can't win.) */ |
| 3679 | if (NILP (XPROCESS (proc)->pid) |
| 3680 | || XINT (XPROCESS (proc)->outfd) == XINT (XPROCESS (proc)->infd)) |
| 3681 | shutdown (XINT (XPROCESS (proc)->outfd), 1); |
| 3682 | /* In case of socketpair, outfd == infd, so don't close it. */ |
| 3683 | if (XINT (XPROCESS (proc)->outfd) != XINT (XPROCESS (proc)->infd)) |
| 3684 | close (XINT (XPROCESS (proc)->outfd)); |
| 3685 | #else /* not HAVE_SHUTDOWN */ |
| 3686 | close (XINT (XPROCESS (proc)->outfd)); |
| 3687 | #endif /* not HAVE_SHUTDOWN */ |
| 3688 | XSETINT (XPROCESS (proc)->outfd, open (NULL_DEVICE, O_WRONLY)); |
| 3689 | } |
| 3690 | #endif /* VMS */ |
| 3691 | return process; |
| 3692 | } |
| 3693 | |
| 3694 | /* Kill all processes associated with `buffer'. |
| 3695 | If `buffer' is nil, kill all processes */ |
| 3696 | |
| 3697 | kill_buffer_processes (buffer) |
| 3698 | Lisp_Object buffer; |
| 3699 | { |
| 3700 | Lisp_Object tail, proc; |
| 3701 | |
| 3702 | for (tail = Vprocess_alist; GC_CONSP (tail); tail = XCONS (tail)->cdr) |
| 3703 | { |
| 3704 | proc = XCONS (XCONS (tail)->car)->cdr; |
| 3705 | if (GC_PROCESSP (proc) |
| 3706 | && (NILP (buffer) || EQ (XPROCESS (proc)->buffer, buffer))) |
| 3707 | { |
| 3708 | if (NETCONN_P (proc)) |
| 3709 | Fdelete_process (proc); |
| 3710 | else if (XINT (XPROCESS (proc)->infd) >= 0) |
| 3711 | process_send_signal (proc, SIGHUP, Qnil, 1); |
| 3712 | } |
| 3713 | } |
| 3714 | } |
| 3715 | \f |
| 3716 | /* On receipt of a signal that a child status has changed, |
| 3717 | loop asking about children with changed statuses until |
| 3718 | the system says there are no more. |
| 3719 | All we do is change the status; |
| 3720 | we do not run sentinels or print notifications. |
| 3721 | That is saved for the next time keyboard input is done, |
| 3722 | in order to avoid timing errors. */ |
| 3723 | |
| 3724 | /** WARNING: this can be called during garbage collection. |
| 3725 | Therefore, it must not be fooled by the presence of mark bits in |
| 3726 | Lisp objects. */ |
| 3727 | |
| 3728 | /** USG WARNING: Although it is not obvious from the documentation |
| 3729 | in signal(2), on a USG system the SIGCLD handler MUST NOT call |
| 3730 | signal() before executing at least one wait(), otherwise the handler |
| 3731 | will be called again, resulting in an infinite loop. The relevant |
| 3732 | portion of the documentation reads "SIGCLD signals will be queued |
| 3733 | and the signal-catching function will be continually reentered until |
| 3734 | the queue is empty". Invoking signal() causes the kernel to reexamine |
| 3735 | the SIGCLD queue. Fred Fish, UniSoft Systems Inc. */ |
| 3736 | |
| 3737 | SIGTYPE |
| 3738 | sigchld_handler (signo) |
| 3739 | int signo; |
| 3740 | { |
| 3741 | int old_errno = errno; |
| 3742 | Lisp_Object proc; |
| 3743 | register struct Lisp_Process *p; |
| 3744 | extern EMACS_TIME *input_available_clear_time; |
| 3745 | |
| 3746 | #ifdef BSD4_1 |
| 3747 | extern int sigheld; |
| 3748 | sigheld |= sigbit (SIGCHLD); |
| 3749 | #endif |
| 3750 | |
| 3751 | while (1) |
| 3752 | { |
| 3753 | register int pid; |
| 3754 | WAITTYPE w; |
| 3755 | Lisp_Object tail; |
| 3756 | |
| 3757 | #ifdef WNOHANG |
| 3758 | #ifndef WUNTRACED |
| 3759 | #define WUNTRACED 0 |
| 3760 | #endif /* no WUNTRACED */ |
| 3761 | /* Keep trying to get a status until we get a definitive result. */ |
| 3762 | do |
| 3763 | { |
| 3764 | errno = 0; |
| 3765 | pid = wait3 (&w, WNOHANG | WUNTRACED, 0); |
| 3766 | } |
| 3767 | while (pid <= 0 && errno == EINTR); |
| 3768 | |
| 3769 | if (pid <= 0) |
| 3770 | { |
| 3771 | /* A real failure. We have done all our job, so return. */ |
| 3772 | |
| 3773 | /* USG systems forget handlers when they are used; |
| 3774 | must reestablish each time */ |
| 3775 | #if defined (USG) && !defined (POSIX_SIGNALS) |
| 3776 | signal (signo, sigchld_handler); /* WARNING - must come after wait3() */ |
| 3777 | #endif |
| 3778 | #ifdef BSD4_1 |
| 3779 | sigheld &= ~sigbit (SIGCHLD); |
| 3780 | sigrelse (SIGCHLD); |
| 3781 | #endif |
| 3782 | errno = old_errno; |
| 3783 | return; |
| 3784 | } |
| 3785 | #else |
| 3786 | pid = wait (&w); |
| 3787 | #endif /* no WNOHANG */ |
| 3788 | |
| 3789 | /* Find the process that signaled us, and record its status. */ |
| 3790 | |
| 3791 | p = 0; |
| 3792 | for (tail = Vprocess_alist; CONSP (tail); tail = XCONS (tail)->cdr) |
| 3793 | { |
| 3794 | proc = XCONS (XCONS (tail)->car)->cdr; |
| 3795 | p = XPROCESS (proc); |
| 3796 | if (EQ (p->childp, Qt) && XFASTINT (p->pid) == pid) |
| 3797 | break; |
| 3798 | p = 0; |
| 3799 | } |
| 3800 | |
| 3801 | /* Look for an asynchronous process whose pid hasn't been filled |
| 3802 | in yet. */ |
| 3803 | if (p == 0) |
| 3804 | for (tail = Vprocess_alist; CONSP (tail); tail = XCONS (tail)->cdr) |
| 3805 | { |
| 3806 | proc = XCONS (XCONS (tail)->car)->cdr; |
| 3807 | p = XPROCESS (proc); |
| 3808 | if (INTEGERP (p->pid) && XINT (p->pid) == -1) |
| 3809 | break; |
| 3810 | p = 0; |
| 3811 | } |
| 3812 | |
| 3813 | /* Change the status of the process that was found. */ |
| 3814 | if (p != 0) |
| 3815 | { |
| 3816 | union { int i; WAITTYPE wt; } u; |
| 3817 | int clear_desc_flag = 0; |
| 3818 | |
| 3819 | XSETINT (p->tick, ++process_tick); |
| 3820 | u.wt = w; |
| 3821 | XSETINT (p->raw_status_low, u.i & 0xffff); |
| 3822 | XSETINT (p->raw_status_high, u.i >> 16); |
| 3823 | |
| 3824 | /* If process has terminated, stop waiting for its output. */ |
| 3825 | if ((WIFSIGNALED (w) || WIFEXITED (w)) |
| 3826 | && XINT (p->infd) >= 0) |
| 3827 | clear_desc_flag = 1; |
| 3828 | |
| 3829 | /* We use clear_desc_flag to avoid a compiler bug in Microsoft C. */ |
| 3830 | if (clear_desc_flag) |
| 3831 | { |
| 3832 | FD_CLR (XINT (p->infd), &input_wait_mask); |
| 3833 | FD_CLR (XINT (p->infd), &non_keyboard_wait_mask); |
| 3834 | } |
| 3835 | |
| 3836 | /* Tell wait_reading_process_input that it needs to wake up and |
| 3837 | look around. */ |
| 3838 | if (input_available_clear_time) |
| 3839 | EMACS_SET_SECS_USECS (*input_available_clear_time, 0, 0); |
| 3840 | } |
| 3841 | |
| 3842 | /* There was no asynchronous process found for that id. Check |
| 3843 | if we have a synchronous process. */ |
| 3844 | else |
| 3845 | { |
| 3846 | synch_process_alive = 0; |
| 3847 | |
| 3848 | /* Report the status of the synchronous process. */ |
| 3849 | if (WIFEXITED (w)) |
| 3850 | synch_process_retcode = WRETCODE (w); |
| 3851 | else if (WIFSIGNALED (w)) |
| 3852 | { |
| 3853 | int code = WTERMSIG (w); |
| 3854 | char *signame = 0; |
| 3855 | |
| 3856 | if (code < NSIG) |
| 3857 | { |
| 3858 | #ifndef VMS |
| 3859 | /* Suppress warning if the table has const char *. */ |
| 3860 | signame = (char *) sys_siglist[code]; |
| 3861 | #else |
| 3862 | signame = sys_errlist[code]; |
| 3863 | #endif |
| 3864 | } |
| 3865 | if (signame == 0) |
| 3866 | signame = "unknown"; |
| 3867 | |
| 3868 | synch_process_death = signame; |
| 3869 | } |
| 3870 | |
| 3871 | /* Tell wait_reading_process_input that it needs to wake up and |
| 3872 | look around. */ |
| 3873 | if (input_available_clear_time) |
| 3874 | EMACS_SET_SECS_USECS (*input_available_clear_time, 0, 0); |
| 3875 | } |
| 3876 | |
| 3877 | /* On some systems, we must return right away. |
| 3878 | If any more processes want to signal us, we will |
| 3879 | get another signal. |
| 3880 | Otherwise (on systems that have WNOHANG), loop around |
| 3881 | to use up all the processes that have something to tell us. */ |
| 3882 | #if defined (USG) && ! (defined (HPUX) && defined (WNOHANG)) || defined (WINDOWSNT) |
| 3883 | #if defined (USG) && ! defined (POSIX_SIGNALS) |
| 3884 | signal (signo, sigchld_handler); |
| 3885 | #endif |
| 3886 | errno = old_errno; |
| 3887 | return; |
| 3888 | #endif /* USG, but not HPUX with WNOHANG */ |
| 3889 | } |
| 3890 | } |
| 3891 | \f |
| 3892 | |
| 3893 | static Lisp_Object |
| 3894 | exec_sentinel_unwind (data) |
| 3895 | Lisp_Object data; |
| 3896 | { |
| 3897 | XPROCESS (XCONS (data)->car)->sentinel = XCONS (data)->cdr; |
| 3898 | return Qnil; |
| 3899 | } |
| 3900 | |
| 3901 | static Lisp_Object |
| 3902 | exec_sentinel_error_handler (error) |
| 3903 | Lisp_Object error; |
| 3904 | { |
| 3905 | cmd_error_internal (error, "error in process sentinel: "); |
| 3906 | Vinhibit_quit = Qt; |
| 3907 | update_echo_area (); |
| 3908 | Fsleep_for (make_number (2), Qnil); |
| 3909 | } |
| 3910 | |
| 3911 | static void |
| 3912 | exec_sentinel (proc, reason) |
| 3913 | Lisp_Object proc, reason; |
| 3914 | { |
| 3915 | Lisp_Object sentinel, obuffer, odeactivate, okeymap; |
| 3916 | register struct Lisp_Process *p = XPROCESS (proc); |
| 3917 | int count = specpdl_ptr - specpdl; |
| 3918 | int outer_running_asynch_code = running_asynch_code; |
| 3919 | |
| 3920 | /* No need to gcpro these, because all we do with them later |
| 3921 | is test them for EQness, and none of them should be a string. */ |
| 3922 | odeactivate = Vdeactivate_mark; |
| 3923 | XSETBUFFER (obuffer, current_buffer); |
| 3924 | okeymap = current_buffer->keymap; |
| 3925 | |
| 3926 | sentinel = p->sentinel; |
| 3927 | if (NILP (sentinel)) |
| 3928 | return; |
| 3929 | |
| 3930 | /* Zilch the sentinel while it's running, to avoid recursive invocations; |
| 3931 | assure that it gets restored no matter how the sentinel exits. */ |
| 3932 | p->sentinel = Qnil; |
| 3933 | record_unwind_protect (exec_sentinel_unwind, Fcons (proc, sentinel)); |
| 3934 | /* Inhibit quit so that random quits don't screw up a running filter. */ |
| 3935 | specbind (Qinhibit_quit, Qt); |
| 3936 | specbind (Qlast_nonmenu_event, Qt); |
| 3937 | |
| 3938 | /* In case we get recursively called, |
| 3939 | and we already saved the match data nonrecursively, |
| 3940 | save the same match data in safely recursive fashion. */ |
| 3941 | if (outer_running_asynch_code) |
| 3942 | { |
| 3943 | Lisp_Object tem; |
| 3944 | tem = Fmatch_data (Qnil, Qnil); |
| 3945 | restore_match_data (); |
| 3946 | record_unwind_protect (Fstore_match_data, Fmatch_data (Qnil, Qnil)); |
| 3947 | Fstore_match_data (tem); |
| 3948 | } |
| 3949 | |
| 3950 | /* For speed, if a search happens within this code, |
| 3951 | save the match data in a special nonrecursive fashion. */ |
| 3952 | running_asynch_code = 1; |
| 3953 | |
| 3954 | internal_condition_case_1 (read_process_output_call, |
| 3955 | Fcons (sentinel, |
| 3956 | Fcons (proc, Fcons (reason, Qnil))), |
| 3957 | !NILP (Vdebug_on_error) ? Qnil : Qerror, |
| 3958 | exec_sentinel_error_handler); |
| 3959 | |
| 3960 | /* If we saved the match data nonrecursively, restore it now. */ |
| 3961 | restore_match_data (); |
| 3962 | running_asynch_code = outer_running_asynch_code; |
| 3963 | |
| 3964 | Vdeactivate_mark = odeactivate; |
| 3965 | #if 0 |
| 3966 | if (! EQ (Fcurrent_buffer (), obuffer) |
| 3967 | || ! EQ (current_buffer->keymap, okeymap)) |
| 3968 | #endif |
| 3969 | /* But do it only if the caller is actually going to read events. |
| 3970 | Otherwise there's no need to make him wake up, and it could |
| 3971 | cause trouble (for example it would make Fsit_for return). */ |
| 3972 | if (waiting_for_user_input_p == -1) |
| 3973 | record_asynch_buffer_change (); |
| 3974 | |
| 3975 | unbind_to (count, Qnil); |
| 3976 | } |
| 3977 | |
| 3978 | /* Report all recent events of a change in process status |
| 3979 | (either run the sentinel or output a message). |
| 3980 | This is done while Emacs is waiting for keyboard input. */ |
| 3981 | |
| 3982 | status_notify () |
| 3983 | { |
| 3984 | register Lisp_Object proc, buffer; |
| 3985 | Lisp_Object tail, msg; |
| 3986 | struct gcpro gcpro1, gcpro2; |
| 3987 | |
| 3988 | tail = Qnil; |
| 3989 | msg = Qnil; |
| 3990 | /* We need to gcpro tail; if read_process_output calls a filter |
| 3991 | which deletes a process and removes the cons to which tail points |
| 3992 | from Vprocess_alist, and then causes a GC, tail is an unprotected |
| 3993 | reference. */ |
| 3994 | GCPRO2 (tail, msg); |
| 3995 | |
| 3996 | /* Set this now, so that if new processes are created by sentinels |
| 3997 | that we run, we get called again to handle their status changes. */ |
| 3998 | update_tick = process_tick; |
| 3999 | |
| 4000 | for (tail = Vprocess_alist; !NILP (tail); tail = Fcdr (tail)) |
| 4001 | { |
| 4002 | Lisp_Object symbol; |
| 4003 | register struct Lisp_Process *p; |
| 4004 | |
| 4005 | proc = Fcdr (Fcar (tail)); |
| 4006 | p = XPROCESS (proc); |
| 4007 | |
| 4008 | if (XINT (p->tick) != XINT (p->update_tick)) |
| 4009 | { |
| 4010 | XSETINT (p->update_tick, XINT (p->tick)); |
| 4011 | |
| 4012 | /* If process is still active, read any output that remains. */ |
| 4013 | while (! EQ (p->filter, Qt) |
| 4014 | && XINT (p->infd) >= 0 |
| 4015 | && read_process_output (proc, XINT (p->infd)) > 0); |
| 4016 | |
| 4017 | buffer = p->buffer; |
| 4018 | |
| 4019 | /* Get the text to use for the message. */ |
| 4020 | if (!NILP (p->raw_status_low)) |
| 4021 | update_status (p); |
| 4022 | msg = status_message (p->status); |
| 4023 | |
| 4024 | /* If process is terminated, deactivate it or delete it. */ |
| 4025 | symbol = p->status; |
| 4026 | if (CONSP (p->status)) |
| 4027 | symbol = XCONS (p->status)->car; |
| 4028 | |
| 4029 | if (EQ (symbol, Qsignal) || EQ (symbol, Qexit) |
| 4030 | || EQ (symbol, Qclosed)) |
| 4031 | { |
| 4032 | if (delete_exited_processes) |
| 4033 | remove_process (proc); |
| 4034 | else |
| 4035 | deactivate_process (proc); |
| 4036 | } |
| 4037 | |
| 4038 | /* The actions above may have further incremented p->tick. |
| 4039 | So set p->update_tick again |
| 4040 | so that an error in the sentinel will not cause |
| 4041 | this code to be run again. */ |
| 4042 | XSETINT (p->update_tick, XINT (p->tick)); |
| 4043 | /* Now output the message suitably. */ |
| 4044 | if (!NILP (p->sentinel)) |
| 4045 | exec_sentinel (proc, msg); |
| 4046 | /* Don't bother with a message in the buffer |
| 4047 | when a process becomes runnable. */ |
| 4048 | else if (!EQ (symbol, Qrun) && !NILP (buffer)) |
| 4049 | { |
| 4050 | Lisp_Object ro, tem; |
| 4051 | struct buffer *old = current_buffer; |
| 4052 | int opoint; |
| 4053 | int before; |
| 4054 | |
| 4055 | ro = XBUFFER (buffer)->read_only; |
| 4056 | |
| 4057 | /* Avoid error if buffer is deleted |
| 4058 | (probably that's why the process is dead, too) */ |
| 4059 | if (NILP (XBUFFER (buffer)->name)) |
| 4060 | continue; |
| 4061 | Fset_buffer (buffer); |
| 4062 | |
| 4063 | opoint = PT; |
| 4064 | /* Insert new output into buffer |
| 4065 | at the current end-of-output marker, |
| 4066 | thus preserving logical ordering of input and output. */ |
| 4067 | if (XMARKER (p->mark)->buffer) |
| 4068 | SET_PT (marker_position (p->mark)); |
| 4069 | else |
| 4070 | SET_PT (ZV); |
| 4071 | |
| 4072 | before = PT; |
| 4073 | |
| 4074 | tem = current_buffer->read_only; |
| 4075 | current_buffer->read_only = Qnil; |
| 4076 | insert_string ("\nProcess "); |
| 4077 | Finsert (1, &p->name); |
| 4078 | insert_string (" "); |
| 4079 | Finsert (1, &msg); |
| 4080 | current_buffer->read_only = tem; |
| 4081 | Fset_marker (p->mark, make_number (PT), p->buffer); |
| 4082 | |
| 4083 | if (opoint >= before) |
| 4084 | SET_PT (opoint + (PT - before)); |
| 4085 | else |
| 4086 | SET_PT (opoint); |
| 4087 | |
| 4088 | set_buffer_internal (old); |
| 4089 | } |
| 4090 | } |
| 4091 | } /* end for */ |
| 4092 | |
| 4093 | update_mode_lines++; /* in case buffers use %s in mode-line-format */ |
| 4094 | redisplay_preserve_echo_area (); |
| 4095 | |
| 4096 | UNGCPRO; |
| 4097 | } |
| 4098 | |
| 4099 | \f |
| 4100 | DEFUN ("set-process-coding-system", Fset_process_coding_system, |
| 4101 | Sset_process_coding_system, 1, 3, 0, |
| 4102 | "Set coding systems of PROCESS to DECODING (input from the process) and\n\ |
| 4103 | ENCODING (output to the process).") |
| 4104 | (proc, decoding, encoding) |
| 4105 | register Lisp_Object proc, decoding, encoding; |
| 4106 | { |
| 4107 | register struct Lisp_Process *p; |
| 4108 | |
| 4109 | CHECK_PROCESS (proc, 0); |
| 4110 | p = XPROCESS (proc); |
| 4111 | if (XINT (p->infd) < 0) |
| 4112 | error ("Input file descriptor of %s closed", XSTRING (p->name)->data); |
| 4113 | if (XINT (p->outfd) < 0) |
| 4114 | error ("Output file descriptor of %s closed", XSTRING (p->name)->data); |
| 4115 | |
| 4116 | p->decode_coding_system = Fcheck_coding_system (decoding); |
| 4117 | p->encode_coding_system = Fcheck_coding_system (encoding); |
| 4118 | setup_coding_system (decoding, |
| 4119 | proc_decode_coding_system[XINT (p->infd)]); |
| 4120 | setup_coding_system (encoding, |
| 4121 | proc_encode_coding_system[XINT (p->outfd)]); |
| 4122 | |
| 4123 | return Qnil; |
| 4124 | } |
| 4125 | |
| 4126 | DEFUN ("process-coding-system", |
| 4127 | Fprocess_coding_system, Sprocess_coding_system, 1, 1, 0, |
| 4128 | "Return a cons of coding systems for decoding and encoding of PROCESS.") |
| 4129 | (proc) |
| 4130 | register Lisp_Object proc; |
| 4131 | { |
| 4132 | CHECK_PROCESS (proc, 0); |
| 4133 | return Fcons (XPROCESS (proc)->decode_coding_system, |
| 4134 | XPROCESS (proc)->encode_coding_system); |
| 4135 | } |
| 4136 | \f |
| 4137 | /* The first time this is called, assume keyboard input comes from DESC |
| 4138 | instead of from where we used to expect it. |
| 4139 | Subsequent calls mean assume input keyboard can come from DESC |
| 4140 | in addition to other places. */ |
| 4141 | |
| 4142 | static int add_keyboard_wait_descriptor_called_flag; |
| 4143 | |
| 4144 | void |
| 4145 | add_keyboard_wait_descriptor (desc) |
| 4146 | int desc; |
| 4147 | { |
| 4148 | if (! add_keyboard_wait_descriptor_called_flag) |
| 4149 | FD_CLR (0, &input_wait_mask); |
| 4150 | add_keyboard_wait_descriptor_called_flag = 1; |
| 4151 | FD_SET (desc, &input_wait_mask); |
| 4152 | FD_SET (desc, &non_process_wait_mask); |
| 4153 | if (desc > max_keyboard_desc) |
| 4154 | max_keyboard_desc = desc; |
| 4155 | } |
| 4156 | |
| 4157 | /* From now on, do not expect DESC to give keyboard input. */ |
| 4158 | |
| 4159 | void |
| 4160 | delete_keyboard_wait_descriptor (desc) |
| 4161 | int desc; |
| 4162 | { |
| 4163 | int fd; |
| 4164 | int lim = max_keyboard_desc; |
| 4165 | |
| 4166 | FD_CLR (desc, &input_wait_mask); |
| 4167 | FD_CLR (desc, &non_process_wait_mask); |
| 4168 | |
| 4169 | if (desc == max_keyboard_desc) |
| 4170 | for (fd = 0; fd < lim; fd++) |
| 4171 | if (FD_ISSET (fd, &input_wait_mask) |
| 4172 | && !FD_ISSET (fd, &non_keyboard_wait_mask)) |
| 4173 | max_keyboard_desc = fd; |
| 4174 | } |
| 4175 | |
| 4176 | /* Return nonzero if *MASK has a bit set |
| 4177 | that corresponds to one of the keyboard input descriptors. */ |
| 4178 | |
| 4179 | int |
| 4180 | keyboard_bit_set (mask) |
| 4181 | SELECT_TYPE *mask; |
| 4182 | { |
| 4183 | int fd; |
| 4184 | |
| 4185 | for (fd = 0; fd <= max_keyboard_desc; fd++) |
| 4186 | if (FD_ISSET (fd, mask) && FD_ISSET (fd, &input_wait_mask) |
| 4187 | && !FD_ISSET (fd, &non_keyboard_wait_mask)) |
| 4188 | return 1; |
| 4189 | |
| 4190 | return 0; |
| 4191 | } |
| 4192 | \f |
| 4193 | init_process () |
| 4194 | { |
| 4195 | register int i; |
| 4196 | |
| 4197 | #ifdef SIGCHLD |
| 4198 | #ifndef CANNOT_DUMP |
| 4199 | if (! noninteractive || initialized) |
| 4200 | #endif |
| 4201 | signal (SIGCHLD, sigchld_handler); |
| 4202 | #endif |
| 4203 | |
| 4204 | FD_ZERO (&input_wait_mask); |
| 4205 | FD_ZERO (&non_keyboard_wait_mask); |
| 4206 | FD_ZERO (&non_process_wait_mask); |
| 4207 | max_process_desc = 0; |
| 4208 | |
| 4209 | FD_SET (0, &input_wait_mask); |
| 4210 | |
| 4211 | Vprocess_alist = Qnil; |
| 4212 | for (i = 0; i < MAXDESC; i++) |
| 4213 | { |
| 4214 | chan_process[i] = Qnil; |
| 4215 | proc_buffered_char[i] = -1; |
| 4216 | } |
| 4217 | bzero (proc_decode_coding_system, sizeof proc_decode_coding_system); |
| 4218 | bzero (proc_encode_coding_system, sizeof proc_encode_coding_system); |
| 4219 | } |
| 4220 | |
| 4221 | syms_of_process () |
| 4222 | { |
| 4223 | Qprocessp = intern ("processp"); |
| 4224 | staticpro (&Qprocessp); |
| 4225 | Qrun = intern ("run"); |
| 4226 | staticpro (&Qrun); |
| 4227 | Qstop = intern ("stop"); |
| 4228 | staticpro (&Qstop); |
| 4229 | Qsignal = intern ("signal"); |
| 4230 | staticpro (&Qsignal); |
| 4231 | |
| 4232 | /* Qexit is already staticpro'd by syms_of_eval; don't staticpro it |
| 4233 | here again. |
| 4234 | |
| 4235 | Qexit = intern ("exit"); |
| 4236 | staticpro (&Qexit); */ |
| 4237 | |
| 4238 | Qopen = intern ("open"); |
| 4239 | staticpro (&Qopen); |
| 4240 | Qclosed = intern ("closed"); |
| 4241 | staticpro (&Qclosed); |
| 4242 | |
| 4243 | Qlast_nonmenu_event = intern ("last-nonmenu-event"); |
| 4244 | staticpro (&Qlast_nonmenu_event); |
| 4245 | |
| 4246 | staticpro (&Vprocess_alist); |
| 4247 | |
| 4248 | DEFVAR_BOOL ("delete-exited-processes", &delete_exited_processes, |
| 4249 | "*Non-nil means delete processes immediately when they exit.\n\ |
| 4250 | nil means don't delete them until `list-processes' is run."); |
| 4251 | |
| 4252 | delete_exited_processes = 1; |
| 4253 | |
| 4254 | DEFVAR_LISP ("process-connection-type", &Vprocess_connection_type, |
| 4255 | "Control type of device used to communicate with subprocesses.\n\ |
| 4256 | Values are nil to use a pipe, or t or `pty' to use a pty.\n\ |
| 4257 | The value has no effect if the system has no ptys or if all ptys are busy:\n\ |
| 4258 | then a pipe is used in any case.\n\ |
| 4259 | The value takes effect when `start-process' is called."); |
| 4260 | Vprocess_connection_type = Qt; |
| 4261 | |
| 4262 | defsubr (&Sprocessp); |
| 4263 | defsubr (&Sget_process); |
| 4264 | defsubr (&Sget_buffer_process); |
| 4265 | defsubr (&Sdelete_process); |
| 4266 | defsubr (&Sprocess_status); |
| 4267 | defsubr (&Sprocess_exit_status); |
| 4268 | defsubr (&Sprocess_id); |
| 4269 | defsubr (&Sprocess_name); |
| 4270 | defsubr (&Sprocess_tty_name); |
| 4271 | defsubr (&Sprocess_command); |
| 4272 | defsubr (&Sset_process_buffer); |
| 4273 | defsubr (&Sprocess_buffer); |
| 4274 | defsubr (&Sprocess_mark); |
| 4275 | defsubr (&Sset_process_filter); |
| 4276 | defsubr (&Sprocess_filter); |
| 4277 | defsubr (&Sset_process_sentinel); |
| 4278 | defsubr (&Sprocess_sentinel); |
| 4279 | defsubr (&Sset_process_window_size); |
| 4280 | defsubr (&Sprocess_kill_without_query); |
| 4281 | defsubr (&Sprocess_contact); |
| 4282 | defsubr (&Slist_processes); |
| 4283 | defsubr (&Sprocess_list); |
| 4284 | defsubr (&Sstart_process); |
| 4285 | #ifdef HAVE_SOCKETS |
| 4286 | defsubr (&Sopen_network_stream); |
| 4287 | #endif /* HAVE_SOCKETS */ |
| 4288 | defsubr (&Saccept_process_output); |
| 4289 | defsubr (&Sprocess_send_region); |
| 4290 | defsubr (&Sprocess_send_string); |
| 4291 | defsubr (&Sinterrupt_process); |
| 4292 | defsubr (&Skill_process); |
| 4293 | defsubr (&Squit_process); |
| 4294 | defsubr (&Sstop_process); |
| 4295 | defsubr (&Scontinue_process); |
| 4296 | defsubr (&Sprocess_send_eof); |
| 4297 | defsubr (&Ssignal_process); |
| 4298 | defsubr (&Swaiting_for_user_input_p); |
| 4299 | /* defsubr (&Sprocess_connection); */ |
| 4300 | defsubr (&Sset_process_coding_system); |
| 4301 | defsubr (&Sprocess_coding_system); |
| 4302 | } |
| 4303 | |
| 4304 | \f |
| 4305 | #else /* not subprocesses */ |
| 4306 | |
| 4307 | #include <sys/types.h> |
| 4308 | #include <errno.h> |
| 4309 | |
| 4310 | #include "lisp.h" |
| 4311 | #include "systime.h" |
| 4312 | #include "termopts.h" |
| 4313 | #include "sysselect.h" |
| 4314 | |
| 4315 | extern int frame_garbaged; |
| 4316 | |
| 4317 | extern EMACS_TIME timer_check (); |
| 4318 | extern int timers_run; |
| 4319 | |
| 4320 | /* As described above, except assuming that there are no subprocesses: |
| 4321 | |
| 4322 | Wait for timeout to elapse and/or keyboard input to be available. |
| 4323 | |
| 4324 | time_limit is: |
| 4325 | timeout in seconds, or |
| 4326 | zero for no limit, or |
| 4327 | -1 means gobble data immediately available but don't wait for any. |
| 4328 | |
| 4329 | read_kbd is a Lisp_Object: |
| 4330 | 0 to ignore keyboard input, or |
| 4331 | 1 to return when input is available, or |
| 4332 | -1 means caller will actually read the input, so don't throw to |
| 4333 | the quit handler. |
| 4334 | a cons cell, meaning wait until its car is non-nil |
| 4335 | (and gobble terminal input into the buffer if any arrives), or |
| 4336 | We know that read_kbd will never be a Lisp_Process, since |
| 4337 | `subprocesses' isn't defined. |
| 4338 | |
| 4339 | do_display != 0 means redisplay should be done to show subprocess |
| 4340 | output that arrives. |
| 4341 | |
| 4342 | Return true iff we received input from any process. */ |
| 4343 | |
| 4344 | int |
| 4345 | wait_reading_process_input (time_limit, microsecs, read_kbd, do_display) |
| 4346 | int time_limit, microsecs; |
| 4347 | Lisp_Object read_kbd; |
| 4348 | int do_display; |
| 4349 | { |
| 4350 | EMACS_TIME end_time, timeout; |
| 4351 | SELECT_TYPE waitchannels; |
| 4352 | int xerrno; |
| 4353 | Lisp_Object *wait_for_cell = 0; |
| 4354 | |
| 4355 | /* If waiting for non-nil in a cell, record where. */ |
| 4356 | if (CONSP (read_kbd)) |
| 4357 | { |
| 4358 | wait_for_cell = &XCONS (read_kbd)->car; |
| 4359 | XSETFASTINT (read_kbd, 0); |
| 4360 | } |
| 4361 | |
| 4362 | /* What does time_limit really mean? */ |
| 4363 | if (time_limit || microsecs) |
| 4364 | { |
| 4365 | if (time_limit == -1) |
| 4366 | /* In fact, it's zero. */ |
| 4367 | EMACS_SET_SECS_USECS (timeout, 0, 0); |
| 4368 | else |
| 4369 | EMACS_SET_SECS_USECS (timeout, time_limit, microsecs); |
| 4370 | |
| 4371 | /* How far in the future is that? */ |
| 4372 | EMACS_GET_TIME (end_time); |
| 4373 | EMACS_ADD_TIME (end_time, end_time, timeout); |
| 4374 | } |
| 4375 | else |
| 4376 | /* It's infinite. */ |
| 4377 | EMACS_SET_SECS_USECS (timeout, 100000, 0); |
| 4378 | |
| 4379 | /* Turn off periodic alarms (in case they are in use) |
| 4380 | because the select emulator uses alarms. */ |
| 4381 | stop_polling (); |
| 4382 | |
| 4383 | for (;;) |
| 4384 | { |
| 4385 | int nfds; |
| 4386 | int timeout_reduced_for_timers = 0; |
| 4387 | |
| 4388 | /* If calling from keyboard input, do not quit |
| 4389 | since we want to return C-g as an input character. |
| 4390 | Otherwise, do pending quit if requested. */ |
| 4391 | if (XINT (read_kbd) >= 0) |
| 4392 | QUIT; |
| 4393 | |
| 4394 | /* Exit now if the cell we're waiting for became non-nil. */ |
| 4395 | if (wait_for_cell && ! NILP (*wait_for_cell)) |
| 4396 | break; |
| 4397 | |
| 4398 | /* Compute time from now till when time limit is up */ |
| 4399 | /* Exit if already run out */ |
| 4400 | if (time_limit > 0 || microsecs) |
| 4401 | { |
| 4402 | EMACS_GET_TIME (timeout); |
| 4403 | EMACS_SUB_TIME (timeout, end_time, timeout); |
| 4404 | if (EMACS_TIME_NEG_P (timeout)) |
| 4405 | break; |
| 4406 | } |
| 4407 | |
| 4408 | /* If our caller will not immediately handle keyboard events, |
| 4409 | run timer events directly. |
| 4410 | (Callers that will immediately read keyboard events |
| 4411 | call timer_delay on their own.) */ |
| 4412 | if (! wait_for_cell) |
| 4413 | { |
| 4414 | EMACS_TIME timer_delay; |
| 4415 | int old_timers_run; |
| 4416 | |
| 4417 | retry: |
| 4418 | old_timers_run = timers_run; |
| 4419 | timer_delay = timer_check (1); |
| 4420 | if (timers_run != old_timers_run && do_display) |
| 4421 | { |
| 4422 | redisplay_preserve_echo_area (); |
| 4423 | /* We must retry, since a timer may have requeued itself |
| 4424 | and that could alter the time delay. */ |
| 4425 | goto retry; |
| 4426 | } |
| 4427 | |
| 4428 | if (! EMACS_TIME_NEG_P (timer_delay) && time_limit != -1) |
| 4429 | { |
| 4430 | EMACS_TIME difference; |
| 4431 | EMACS_SUB_TIME (difference, timer_delay, timeout); |
| 4432 | if (EMACS_TIME_NEG_P (difference)) |
| 4433 | { |
| 4434 | timeout = timer_delay; |
| 4435 | timeout_reduced_for_timers = 1; |
| 4436 | } |
| 4437 | } |
| 4438 | } |
| 4439 | |
| 4440 | /* Cause C-g and alarm signals to take immediate action, |
| 4441 | and cause input available signals to zero out timeout. */ |
| 4442 | if (XINT (read_kbd) < 0) |
| 4443 | set_waiting_for_input (&timeout); |
| 4444 | |
| 4445 | /* Wait till there is something to do. */ |
| 4446 | |
| 4447 | if (! XINT (read_kbd) && wait_for_cell == 0) |
| 4448 | FD_ZERO (&waitchannels); |
| 4449 | else |
| 4450 | FD_SET (0, &waitchannels); |
| 4451 | |
| 4452 | /* If a frame has been newly mapped and needs updating, |
| 4453 | reprocess its display stuff. */ |
| 4454 | if (frame_garbaged && do_display) |
| 4455 | { |
| 4456 | clear_waiting_for_input (); |
| 4457 | redisplay_preserve_echo_area (); |
| 4458 | if (XINT (read_kbd) < 0) |
| 4459 | set_waiting_for_input (&timeout); |
| 4460 | } |
| 4461 | |
| 4462 | if (XINT (read_kbd) && detect_input_pending ()) |
| 4463 | { |
| 4464 | nfds = 0; |
| 4465 | FD_ZERO (&waitchannels); |
| 4466 | } |
| 4467 | else |
| 4468 | nfds = select (1, &waitchannels, (SELECT_TYPE *)0, (SELECT_TYPE *)0, |
| 4469 | &timeout); |
| 4470 | |
| 4471 | xerrno = errno; |
| 4472 | |
| 4473 | /* Make C-g and alarm signals set flags again */ |
| 4474 | clear_waiting_for_input (); |
| 4475 | |
| 4476 | /* If we woke up due to SIGWINCH, actually change size now. */ |
| 4477 | do_pending_window_change (); |
| 4478 | |
| 4479 | if (time_limit && nfds == 0 && ! timeout_reduced_for_timers) |
| 4480 | /* We waited the full specified time, so return now. */ |
| 4481 | break; |
| 4482 | |
| 4483 | if (nfds == -1) |
| 4484 | { |
| 4485 | /* If the system call was interrupted, then go around the |
| 4486 | loop again. */ |
| 4487 | if (xerrno == EINTR) |
| 4488 | FD_ZERO (&waitchannels); |
| 4489 | else |
| 4490 | error ("select error: %s", strerror (xerrno)); |
| 4491 | } |
| 4492 | #ifdef sun |
| 4493 | else if (nfds > 0 && (waitchannels & 1) && interrupt_input) |
| 4494 | /* System sometimes fails to deliver SIGIO. */ |
| 4495 | kill (getpid (), SIGIO); |
| 4496 | #endif |
| 4497 | #ifdef SIGIO |
| 4498 | if (XINT (read_kbd) && interrupt_input && (waitchannels & 1)) |
| 4499 | kill (getpid (), SIGIO); |
| 4500 | #endif |
| 4501 | |
| 4502 | /* Check for keyboard input */ |
| 4503 | |
| 4504 | if ((XINT (read_kbd) != 0) |
| 4505 | && detect_input_pending_run_timers (do_display)) |
| 4506 | { |
| 4507 | swallow_events (do_display); |
| 4508 | if (detect_input_pending_run_timers (do_display)) |
| 4509 | break; |
| 4510 | } |
| 4511 | |
| 4512 | /* If wait_for_cell. check for keyboard input |
| 4513 | but don't run any timers. |
| 4514 | ??? (It seems wrong to me to check for keyboard |
| 4515 | input at all when wait_for_cell, but the code |
| 4516 | has been this way since July 1994. |
| 4517 | Try changing this after version 19.31.) */ |
| 4518 | if (wait_for_cell |
| 4519 | && detect_input_pending ()) |
| 4520 | { |
| 4521 | swallow_events (do_display); |
| 4522 | if (detect_input_pending ()) |
| 4523 | break; |
| 4524 | } |
| 4525 | |
| 4526 | /* Exit now if the cell we're waiting for became non-nil. */ |
| 4527 | if (wait_for_cell && ! NILP (*wait_for_cell)) |
| 4528 | break; |
| 4529 | } |
| 4530 | |
| 4531 | start_polling (); |
| 4532 | |
| 4533 | return 0; |
| 4534 | } |
| 4535 | |
| 4536 | |
| 4537 | DEFUN ("get-buffer-process", Fget_buffer_process, Sget_buffer_process, 1, 1, 0, |
| 4538 | /* Don't confuse make-docfile by having two doc strings for this function. |
| 4539 | make-docfile does not pay attention to #if, for good reason! */ |
| 4540 | 0) |
| 4541 | (name) |
| 4542 | register Lisp_Object name; |
| 4543 | { |
| 4544 | return Qnil; |
| 4545 | } |
| 4546 | |
| 4547 | /* Kill all processes associated with `buffer'. |
| 4548 | If `buffer' is nil, kill all processes. |
| 4549 | Since we have no subprocesses, this does nothing. */ |
| 4550 | |
| 4551 | kill_buffer_processes (buffer) |
| 4552 | Lisp_Object buffer; |
| 4553 | { |
| 4554 | } |
| 4555 | |
| 4556 | init_process () |
| 4557 | { |
| 4558 | } |
| 4559 | |
| 4560 | syms_of_process () |
| 4561 | { |
| 4562 | defsubr (&Sget_buffer_process); |
| 4563 | } |
| 4564 | |
| 4565 | \f |
| 4566 | #endif /* not subprocesses */ |