| 1 | /* Interfaces to system-dependent kernel and library entries. |
| 2 | Copyright (C) 1985, 1986, 1987, 1988, 1993, 1994, 1995, 1999, 2000, 2001, |
| 3 | 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010 |
| 4 | Free Software Foundation, Inc. |
| 5 | |
| 6 | This file is part of GNU Emacs. |
| 7 | |
| 8 | GNU Emacs is free software: you can redistribute it and/or modify |
| 9 | it under the terms of the GNU General Public License as published by |
| 10 | the Free Software Foundation, either version 3 of the License, or |
| 11 | (at your option) any later version. |
| 12 | |
| 13 | GNU Emacs is distributed in the hope that it will be useful, |
| 14 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 15 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 16 | GNU General Public License for more details. |
| 17 | |
| 18 | You should have received a copy of the GNU General Public License |
| 19 | along with GNU Emacs. If not, see <http://www.gnu.org/licenses/>. */ |
| 20 | |
| 21 | #ifdef HAVE_CONFIG_H |
| 22 | #include <config.h> |
| 23 | #endif |
| 24 | |
| 25 | #include <ctype.h> |
| 26 | #include <signal.h> |
| 27 | #include <stdio.h> |
| 28 | #include <setjmp.h> |
| 29 | #ifdef HAVE_PWD_H |
| 30 | #include <pwd.h> |
| 31 | #include <grp.h> |
| 32 | #endif /* HAVE_PWD_H */ |
| 33 | #ifdef HAVE_LIMITS_H |
| 34 | #include <limits.h> |
| 35 | #endif /* HAVE_LIMITS_H */ |
| 36 | #ifdef HAVE_UNISTD_H |
| 37 | #include <unistd.h> |
| 38 | #endif |
| 39 | #ifdef HAVE_ALLOCA_H |
| 40 | #include <alloca.h> |
| 41 | #endif /* HAVE_ALLOCA_H */ |
| 42 | |
| 43 | #include "lisp.h" |
| 44 | /* Including stdlib.h isn't necessarily enough to get srandom |
| 45 | declared, e.g. without __USE_XOPEN_EXTENDED with glibc 2. */ |
| 46 | |
| 47 | /* The w32 build defines select stuff in w32.h, which is included by |
| 48 | sys/select.h (included below). */ |
| 49 | #ifndef WINDOWSNT |
| 50 | #include "sysselect.h" |
| 51 | #endif |
| 52 | |
| 53 | #include "blockinput.h" |
| 54 | |
| 55 | #ifdef WINDOWSNT |
| 56 | #define read sys_read |
| 57 | #define write sys_write |
| 58 | #include <windows.h> |
| 59 | #ifndef NULL |
| 60 | #define NULL 0 |
| 61 | #endif |
| 62 | #endif /* not WINDOWSNT */ |
| 63 | |
| 64 | /* Does anyone other than VMS need this? */ |
| 65 | #ifndef fwrite |
| 66 | #define sys_fwrite fwrite |
| 67 | #else |
| 68 | #undef fwrite |
| 69 | #endif |
| 70 | |
| 71 | #include <sys/types.h> |
| 72 | #include <sys/stat.h> |
| 73 | #include <errno.h> |
| 74 | |
| 75 | #ifdef HAVE_SETPGID |
| 76 | #if !defined (USG) || defined (BSD_PGRPS) |
| 77 | #undef setpgrp |
| 78 | #define setpgrp setpgid |
| 79 | #endif |
| 80 | #endif |
| 81 | |
| 82 | /* Get SI_SRPC_DOMAIN, if it is available. */ |
| 83 | #ifdef HAVE_SYS_SYSTEMINFO_H |
| 84 | #include <sys/systeminfo.h> |
| 85 | #endif |
| 86 | |
| 87 | #ifdef MSDOS /* Demacs 1.1.2 91/10/20 Manabu Higashida, MW Aug 1993 */ |
| 88 | #include <dos.h> |
| 89 | #include "dosfns.h" |
| 90 | #include "msdos.h" |
| 91 | #include <sys/param.h> |
| 92 | |
| 93 | extern int etext; |
| 94 | extern unsigned start __asm__ ("start"); |
| 95 | #endif |
| 96 | |
| 97 | #include <sys/file.h> |
| 98 | |
| 99 | #ifdef HAVE_FCNTL_H |
| 100 | #include <fcntl.h> |
| 101 | #endif |
| 102 | |
| 103 | #ifndef MSDOS |
| 104 | #include <sys/ioctl.h> |
| 105 | #endif |
| 106 | |
| 107 | #include "systty.h" |
| 108 | #include "syswait.h" |
| 109 | |
| 110 | #if defined (USG) |
| 111 | #include <sys/utsname.h> |
| 112 | #include <memory.h> |
| 113 | #endif /* USG */ |
| 114 | |
| 115 | extern int quit_char; |
| 116 | |
| 117 | #include "keyboard.h" |
| 118 | #include "frame.h" |
| 119 | #include "window.h" |
| 120 | #include "termhooks.h" |
| 121 | #include "termchar.h" |
| 122 | #include "termopts.h" |
| 123 | #include "dispextern.h" |
| 124 | #include "process.h" |
| 125 | #include "cm.h" /* for reset_sys_modes */ |
| 126 | |
| 127 | /* For serial_configure and serial_open. */ |
| 128 | extern Lisp_Object QCport, QCspeed, QCprocess; |
| 129 | extern Lisp_Object QCbytesize, QCstopbits, QCparity, Qodd, Qeven; |
| 130 | extern Lisp_Object QCflowcontrol, Qhw, Qsw, QCsummary; |
| 131 | |
| 132 | #ifdef WINDOWSNT |
| 133 | #include <direct.h> |
| 134 | /* In process.h which conflicts with the local copy. */ |
| 135 | #define _P_WAIT 0 |
| 136 | int _cdecl _spawnlp (int, const char *, const char *, ...); |
| 137 | int _cdecl _getpid (void); |
| 138 | extern char *getwd (char *); |
| 139 | #endif |
| 140 | |
| 141 | #include "syssignal.h" |
| 142 | #include "systime.h" |
| 143 | #ifdef HAVE_UTIME_H |
| 144 | #include <utime.h> |
| 145 | #endif |
| 146 | |
| 147 | #ifndef HAVE_UTIMES |
| 148 | #ifndef HAVE_STRUCT_UTIMBUF |
| 149 | /* We want to use utime rather than utimes, but we couldn't find the |
| 150 | structure declaration. We'll use the traditional one. */ |
| 151 | struct utimbuf { |
| 152 | long actime; |
| 153 | long modtime; |
| 154 | }; |
| 155 | #endif |
| 156 | #endif |
| 157 | |
| 158 | /* LPASS8 is new in 4.3, and makes cbreak mode provide all 8 bits. */ |
| 159 | #ifndef LPASS8 |
| 160 | #define LPASS8 0 |
| 161 | #endif |
| 162 | |
| 163 | static const int baud_convert[] = |
| 164 | { |
| 165 | 0, 50, 75, 110, 135, 150, 200, 300, 600, 1200, |
| 166 | 1800, 2400, 4800, 9600, 19200, 38400 |
| 167 | }; |
| 168 | |
| 169 | #ifdef HAVE_SPEED_T |
| 170 | #include <termios.h> |
| 171 | #else |
| 172 | #if defined (HAVE_LIBNCURSES) && ! defined (NCURSES_OSPEED_T) |
| 173 | #else |
| 174 | #if defined (HAVE_TERMIOS_H) && defined (GNU_LINUX) |
| 175 | #include <termios.h> |
| 176 | #endif |
| 177 | #endif |
| 178 | #endif |
| 179 | |
| 180 | int emacs_ospeed; |
| 181 | |
| 182 | void croak P_ ((char *)) NO_RETURN; |
| 183 | |
| 184 | /* Temporary used by `sigblock' when defined in terms of signprocmask. */ |
| 185 | |
| 186 | SIGMASKTYPE sigprocmask_set; |
| 187 | |
| 188 | |
| 189 | #if !defined (HAVE_GET_CURRENT_DIR_NAME) || defined (BROKEN_GET_CURRENT_DIR_NAME) |
| 190 | |
| 191 | /* Return the current working directory. Returns NULL on errors. |
| 192 | Any other returned value must be freed with free. This is used |
| 193 | only when get_current_dir_name is not defined on the system. */ |
| 194 | char* |
| 195 | get_current_dir_name () |
| 196 | { |
| 197 | char *buf; |
| 198 | char *pwd; |
| 199 | struct stat dotstat, pwdstat; |
| 200 | /* If PWD is accurate, use it instead of calling getwd. PWD is |
| 201 | sometimes a nicer name, and using it may avoid a fatal error if a |
| 202 | parent directory is searchable but not readable. */ |
| 203 | if ((pwd = getenv ("PWD")) != 0 |
| 204 | && (IS_DIRECTORY_SEP (*pwd) || (*pwd && IS_DEVICE_SEP (pwd[1]))) |
| 205 | && stat (pwd, &pwdstat) == 0 |
| 206 | && stat (".", &dotstat) == 0 |
| 207 | && dotstat.st_ino == pwdstat.st_ino |
| 208 | && dotstat.st_dev == pwdstat.st_dev |
| 209 | #ifdef MAXPATHLEN |
| 210 | && strlen (pwd) < MAXPATHLEN |
| 211 | #endif |
| 212 | ) |
| 213 | { |
| 214 | buf = (char *) malloc (strlen (pwd) + 1); |
| 215 | if (!buf) |
| 216 | return NULL; |
| 217 | strcpy (buf, pwd); |
| 218 | } |
| 219 | #ifdef HAVE_GETCWD |
| 220 | else |
| 221 | { |
| 222 | size_t buf_size = 1024; |
| 223 | buf = (char *) malloc (buf_size); |
| 224 | if (!buf) |
| 225 | return NULL; |
| 226 | for (;;) |
| 227 | { |
| 228 | if (getcwd (buf, buf_size) == buf) |
| 229 | break; |
| 230 | if (errno != ERANGE) |
| 231 | { |
| 232 | int tmp_errno = errno; |
| 233 | free (buf); |
| 234 | errno = tmp_errno; |
| 235 | return NULL; |
| 236 | } |
| 237 | buf_size *= 2; |
| 238 | buf = (char *) realloc (buf, buf_size); |
| 239 | if (!buf) |
| 240 | return NULL; |
| 241 | } |
| 242 | } |
| 243 | #else |
| 244 | else |
| 245 | { |
| 246 | /* We need MAXPATHLEN here. */ |
| 247 | buf = (char *) malloc (MAXPATHLEN + 1); |
| 248 | if (!buf) |
| 249 | return NULL; |
| 250 | if (getwd (buf) == NULL) |
| 251 | { |
| 252 | int tmp_errno = errno; |
| 253 | free (buf); |
| 254 | errno = tmp_errno; |
| 255 | return NULL; |
| 256 | } |
| 257 | } |
| 258 | #endif |
| 259 | return buf; |
| 260 | } |
| 261 | #endif |
| 262 | |
| 263 | \f |
| 264 | /* Discard pending input on all input descriptors. */ |
| 265 | |
| 266 | void |
| 267 | discard_tty_input () |
| 268 | { |
| 269 | #ifndef WINDOWSNT |
| 270 | struct emacs_tty buf; |
| 271 | |
| 272 | if (noninteractive) |
| 273 | return; |
| 274 | |
| 275 | #ifdef MSDOS /* Demacs 1.1.1 91/10/16 HIRANO Satoshi */ |
| 276 | while (dos_keyread () != -1) |
| 277 | ; |
| 278 | #else /* not MSDOS */ |
| 279 | { |
| 280 | struct tty_display_info *tty; |
| 281 | for (tty = tty_list; tty; tty = tty->next) |
| 282 | { |
| 283 | if (tty->input) /* Is the device suspended? */ |
| 284 | { |
| 285 | EMACS_GET_TTY (fileno (tty->input), &buf); |
| 286 | EMACS_SET_TTY (fileno (tty->input), &buf, 0); |
| 287 | } |
| 288 | } |
| 289 | } |
| 290 | #endif /* not MSDOS */ |
| 291 | #endif /* not WINDOWSNT */ |
| 292 | } |
| 293 | |
| 294 | \f |
| 295 | #ifdef SIGTSTP |
| 296 | |
| 297 | /* Arrange for character C to be read as the next input from |
| 298 | the terminal. |
| 299 | XXX What if we have multiple ttys? |
| 300 | */ |
| 301 | |
| 302 | void |
| 303 | stuff_char (char c) |
| 304 | { |
| 305 | if (! FRAME_TERMCAP_P (SELECTED_FRAME ())) |
| 306 | return; |
| 307 | |
| 308 | /* Should perhaps error if in batch mode */ |
| 309 | #ifdef TIOCSTI |
| 310 | ioctl (fileno (CURTTY()->input), TIOCSTI, &c); |
| 311 | #else /* no TIOCSTI */ |
| 312 | error ("Cannot stuff terminal input characters in this version of Unix"); |
| 313 | #endif /* no TIOCSTI */ |
| 314 | } |
| 315 | |
| 316 | #endif /* SIGTSTP */ |
| 317 | \f |
| 318 | void |
| 319 | init_baud_rate (int fd) |
| 320 | { |
| 321 | if (noninteractive) |
| 322 | emacs_ospeed = 0; |
| 323 | else |
| 324 | { |
| 325 | #ifdef DOS_NT |
| 326 | emacs_ospeed = 15; |
| 327 | #else /* not DOS_NT */ |
| 328 | #ifdef HAVE_TERMIOS |
| 329 | struct termios sg; |
| 330 | |
| 331 | sg.c_cflag = B9600; |
| 332 | tcgetattr (fd, &sg); |
| 333 | emacs_ospeed = cfgetospeed (&sg); |
| 334 | #else /* not TERMIOS */ |
| 335 | #ifdef HAVE_TERMIO |
| 336 | struct termio sg; |
| 337 | |
| 338 | sg.c_cflag = B9600; |
| 339 | #ifdef HAVE_TCATTR |
| 340 | tcgetattr (fd, &sg); |
| 341 | #else |
| 342 | ioctl (fd, TCGETA, &sg); |
| 343 | #endif |
| 344 | emacs_ospeed = sg.c_cflag & CBAUD; |
| 345 | #else /* neither TERMIOS nor TERMIO */ |
| 346 | struct sgttyb sg; |
| 347 | |
| 348 | sg.sg_ospeed = B9600; |
| 349 | if (ioctl (fd, TIOCGETP, &sg) < 0) |
| 350 | abort (); |
| 351 | emacs_ospeed = sg.sg_ospeed; |
| 352 | #endif /* not HAVE_TERMIO */ |
| 353 | #endif /* not HAVE_TERMIOS */ |
| 354 | #endif /* not DOS_NT */ |
| 355 | } |
| 356 | |
| 357 | baud_rate = (emacs_ospeed < sizeof baud_convert / sizeof baud_convert[0] |
| 358 | ? baud_convert[emacs_ospeed] : 9600); |
| 359 | if (baud_rate == 0) |
| 360 | baud_rate = 1200; |
| 361 | } |
| 362 | |
| 363 | \f |
| 364 | /*ARGSUSED*/ |
| 365 | void |
| 366 | set_exclusive_use (fd) |
| 367 | int fd; |
| 368 | { |
| 369 | #ifdef FIOCLEX |
| 370 | ioctl (fd, FIOCLEX, 0); |
| 371 | #endif |
| 372 | /* Ok to do nothing if this feature does not exist */ |
| 373 | } |
| 374 | \f |
| 375 | #ifndef subprocesses |
| 376 | |
| 377 | wait_without_blocking () |
| 378 | { |
| 379 | croak ("wait_without_blocking"); |
| 380 | synch_process_alive = 0; |
| 381 | } |
| 382 | |
| 383 | #endif /* not subprocesses */ |
| 384 | |
| 385 | int wait_debugging; /* Set nonzero to make following function work under dbx |
| 386 | (at least for bsd). */ |
| 387 | |
| 388 | SIGTYPE |
| 389 | wait_for_termination_signal () |
| 390 | {} |
| 391 | |
| 392 | /* Wait for subprocess with process id `pid' to terminate and |
| 393 | make sure it will get eliminated (not remain forever as a zombie) */ |
| 394 | |
| 395 | void |
| 396 | wait_for_termination (pid) |
| 397 | int pid; |
| 398 | { |
| 399 | while (1) |
| 400 | { |
| 401 | #ifdef subprocesses |
| 402 | #if defined (BSD_SYSTEM) || defined (HPUX) |
| 403 | /* Note that kill returns -1 even if the process is just a zombie now. |
| 404 | But inevitably a SIGCHLD interrupt should be generated |
| 405 | and child_sig will do wait3 and make the process go away. */ |
| 406 | /* There is some indication that there is a bug involved with |
| 407 | termination of subprocesses, perhaps involving a kernel bug too, |
| 408 | but no idea what it is. Just as a hunch we signal SIGCHLD to see |
| 409 | if that causes the problem to go away or get worse. */ |
| 410 | sigsetmask (sigmask (SIGCHLD)); |
| 411 | if (0 > kill (pid, 0)) |
| 412 | { |
| 413 | sigsetmask (SIGEMPTYMASK); |
| 414 | kill (getpid (), SIGCHLD); |
| 415 | break; |
| 416 | } |
| 417 | if (wait_debugging) |
| 418 | sleep (1); |
| 419 | else |
| 420 | sigpause (SIGEMPTYMASK); |
| 421 | #else /* not BSD_SYSTEM, and not HPUX version >= 6 */ |
| 422 | #ifdef POSIX_SIGNALS /* would this work for GNU/Linux as well? */ |
| 423 | sigblock (sigmask (SIGCHLD)); |
| 424 | errno = 0; |
| 425 | if (kill (pid, 0) == -1 && errno == ESRCH) |
| 426 | { |
| 427 | sigunblock (sigmask (SIGCHLD)); |
| 428 | break; |
| 429 | } |
| 430 | |
| 431 | sigsuspend (&empty_mask); |
| 432 | #else /* not POSIX_SIGNALS */ |
| 433 | #ifdef HAVE_SYSV_SIGPAUSE |
| 434 | sighold (SIGCHLD); |
| 435 | if (0 > kill (pid, 0)) |
| 436 | { |
| 437 | sigrelse (SIGCHLD); |
| 438 | break; |
| 439 | } |
| 440 | sigpause (SIGCHLD); |
| 441 | #else /* not HAVE_SYSV_SIGPAUSE */ |
| 442 | #ifdef WINDOWSNT |
| 443 | wait (0); |
| 444 | break; |
| 445 | #else /* not WINDOWSNT */ |
| 446 | if (0 > kill (pid, 0)) |
| 447 | break; |
| 448 | /* Using sleep instead of pause avoids timing error. |
| 449 | If the inferior dies just before the sleep, |
| 450 | we lose just one second. */ |
| 451 | sleep (1); |
| 452 | #endif /* not WINDOWSNT */ |
| 453 | #endif /* not HAVE_SYSV_SIGPAUSE */ |
| 454 | #endif /* not POSIX_SIGNALS */ |
| 455 | #endif /* not BSD_SYSTEM, and not HPUX version >= 6 */ |
| 456 | #else /* not subprocesses */ |
| 457 | break; |
| 458 | #endif /* not subprocesses */ |
| 459 | } |
| 460 | } |
| 461 | |
| 462 | #ifdef subprocesses |
| 463 | |
| 464 | /* |
| 465 | * flush any pending output |
| 466 | * (may flush input as well; it does not matter the way we use it) |
| 467 | */ |
| 468 | |
| 469 | void |
| 470 | flush_pending_output (channel) |
| 471 | int channel; |
| 472 | { |
| 473 | #ifdef HAVE_TERMIOS |
| 474 | /* If we try this, we get hit with SIGTTIN, because |
| 475 | the child's tty belongs to the child's pgrp. */ |
| 476 | #else |
| 477 | #ifdef TCFLSH |
| 478 | ioctl (channel, TCFLSH, 1); |
| 479 | #else |
| 480 | #ifdef TIOCFLUSH |
| 481 | int zero = 0; |
| 482 | /* 3rd arg should be ignored |
| 483 | but some 4.2 kernels actually want the address of an int |
| 484 | and nonzero means something different. */ |
| 485 | ioctl (channel, TIOCFLUSH, &zero); |
| 486 | #endif |
| 487 | #endif |
| 488 | #endif |
| 489 | } |
| 490 | \f |
| 491 | /* Set up the terminal at the other end of a pseudo-terminal that |
| 492 | we will be controlling an inferior through. |
| 493 | It should not echo or do line-editing, since that is done |
| 494 | in Emacs. No padding needed for insertion into an Emacs buffer. */ |
| 495 | |
| 496 | void |
| 497 | child_setup_tty (out) |
| 498 | int out; |
| 499 | { |
| 500 | #ifndef DOS_NT |
| 501 | struct emacs_tty s; |
| 502 | |
| 503 | EMACS_GET_TTY (out, &s); |
| 504 | |
| 505 | #if defined (HAVE_TERMIO) || defined (HAVE_TERMIOS) |
| 506 | s.main.c_oflag |= OPOST; /* Enable output postprocessing */ |
| 507 | s.main.c_oflag &= ~ONLCR; /* Disable map of NL to CR-NL on output */ |
| 508 | #ifdef NLDLY |
| 509 | /* http://lists.gnu.org/archive/html/emacs-devel/2008-05/msg00406.html |
| 510 | Some versions of GNU Hurd do not have FFDLY? */ |
| 511 | #ifdef FFDLY |
| 512 | s.main.c_oflag &= ~(NLDLY|CRDLY|TABDLY|BSDLY|VTDLY|FFDLY); |
| 513 | /* No output delays */ |
| 514 | #else |
| 515 | s.main.c_oflag &= ~(NLDLY|CRDLY|TABDLY|BSDLY|VTDLY); |
| 516 | /* No output delays */ |
| 517 | #endif |
| 518 | #endif |
| 519 | s.main.c_lflag &= ~ECHO; /* Disable echo */ |
| 520 | s.main.c_lflag |= ISIG; /* Enable signals */ |
| 521 | #ifdef IUCLC |
| 522 | s.main.c_iflag &= ~IUCLC; /* Disable downcasing on input. */ |
| 523 | #endif |
| 524 | #ifdef ISTRIP |
| 525 | s.main.c_iflag &= ~ISTRIP; /* don't strip 8th bit on input */ |
| 526 | #endif |
| 527 | #ifdef OLCUC |
| 528 | s.main.c_oflag &= ~OLCUC; /* Disable upcasing on output. */ |
| 529 | #endif |
| 530 | s.main.c_oflag &= ~TAB3; /* Disable tab expansion */ |
| 531 | s.main.c_cflag = (s.main.c_cflag & ~CSIZE) | CS8; /* Don't strip 8th bit */ |
| 532 | s.main.c_cc[VERASE] = CDISABLE; /* disable erase processing */ |
| 533 | s.main.c_cc[VKILL] = CDISABLE; /* disable kill processing */ |
| 534 | |
| 535 | #ifdef HPUX |
| 536 | s.main.c_cflag = (s.main.c_cflag & ~CBAUD) | B9600; /* baud rate sanity */ |
| 537 | #endif /* HPUX */ |
| 538 | |
| 539 | #ifdef SIGNALS_VIA_CHARACTERS |
| 540 | /* the QUIT and INTR character are used in process_send_signal |
| 541 | so set them here to something useful. */ |
| 542 | if (s.main.c_cc[VQUIT] == CDISABLE) |
| 543 | s.main.c_cc[VQUIT] = '\\'&037; /* Control-\ */ |
| 544 | if (s.main.c_cc[VINTR] == CDISABLE) |
| 545 | s.main.c_cc[VINTR] = 'C'&037; /* Control-C */ |
| 546 | #endif /* not SIGNALS_VIA_CHARACTERS */ |
| 547 | |
| 548 | #ifdef AIX |
| 549 | /* AIX enhanced edit loses NULs, so disable it */ |
| 550 | #ifndef IBMR2AIX |
| 551 | s.main.c_line = 0; |
| 552 | s.main.c_iflag &= ~ASCEDIT; |
| 553 | #endif |
| 554 | /* Also, PTY overloads NUL and BREAK. |
| 555 | don't ignore break, but don't signal either, so it looks like NUL. */ |
| 556 | s.main.c_iflag &= ~IGNBRK; |
| 557 | s.main.c_iflag &= ~BRKINT; |
| 558 | /* rms: Formerly it set s.main.c_cc[VINTR] to 0377 here |
| 559 | unconditionally. Then a SIGNALS_VIA_CHARACTERS conditional |
| 560 | would force it to 0377. That looks like duplicated code. */ |
| 561 | s.main.c_cflag = (s.main.c_cflag & ~CBAUD) | B9600; /* baud rate sanity */ |
| 562 | #endif /* AIX */ |
| 563 | |
| 564 | #else /* not HAVE_TERMIO */ |
| 565 | |
| 566 | s.main.sg_flags &= ~(ECHO | CRMOD | ANYP | ALLDELAY | RAW | LCASE |
| 567 | | CBREAK | TANDEM); |
| 568 | s.main.sg_flags |= LPASS8; |
| 569 | s.main.sg_erase = 0377; |
| 570 | s.main.sg_kill = 0377; |
| 571 | s.lmode = LLITOUT | s.lmode; /* Don't strip 8th bit */ |
| 572 | |
| 573 | /* We used to enable ICANON (and set VEOF to 04), but this leads to |
| 574 | problems where process.c wants to send EOFs every once in a while |
| 575 | to force the output, which leads to weird effects when the |
| 576 | subprocess has disabled ICANON and ends up seeing those spurious |
| 577 | extra EOFs. So we don't send EOFs any more in |
| 578 | process.c:send_process, and instead we disable ICANON by default, |
| 579 | so if a subsprocess sets up ICANON, it's his problem (or the Elisp |
| 580 | package that talks to it) to deal with lines that are too long. */ |
| 581 | s.main.c_lflag &= ~ICANON; /* Disable line editing and eof processing */ |
| 582 | s.main.c_cc[VMIN] = 1; |
| 583 | s.main.c_cc[VTIME] = 0; |
| 584 | |
| 585 | #endif /* not HAVE_TERMIO */ |
| 586 | |
| 587 | EMACS_SET_TTY (out, &s, 0); |
| 588 | |
| 589 | #endif /* not DOS_NT */ |
| 590 | } |
| 591 | |
| 592 | #endif /* subprocesses */ |
| 593 | \f |
| 594 | /* Record a signal code and the handler for it. */ |
| 595 | struct save_signal |
| 596 | { |
| 597 | int code; |
| 598 | SIGTYPE (*handler) P_ ((int)); |
| 599 | }; |
| 600 | |
| 601 | static void save_signal_handlers P_ ((struct save_signal *)); |
| 602 | static void restore_signal_handlers P_ ((struct save_signal *)); |
| 603 | |
| 604 | /* Suspend the Emacs process; give terminal to its superior. */ |
| 605 | |
| 606 | void |
| 607 | sys_suspend () |
| 608 | { |
| 609 | #if defined (SIGTSTP) && !defined (MSDOS) |
| 610 | |
| 611 | { |
| 612 | int pgrp = EMACS_GETPGRP (0); |
| 613 | EMACS_KILLPG (pgrp, SIGTSTP); |
| 614 | } |
| 615 | |
| 616 | #else /* No SIGTSTP */ |
| 617 | /* On a system where suspending is not implemented, |
| 618 | instead fork a subshell and let it talk directly to the terminal |
| 619 | while we wait. */ |
| 620 | sys_subshell (); |
| 621 | |
| 622 | #endif /* no SIGTSTP */ |
| 623 | } |
| 624 | |
| 625 | /* Fork a subshell. */ |
| 626 | |
| 627 | void |
| 628 | sys_subshell () |
| 629 | { |
| 630 | #ifdef DOS_NT /* Demacs 1.1.2 91/10/20 Manabu Higashida */ |
| 631 | int st; |
| 632 | char oldwd[MAXPATHLEN+1]; /* Fixed length is safe on MSDOS. */ |
| 633 | #endif |
| 634 | int pid; |
| 635 | struct save_signal saved_handlers[5]; |
| 636 | Lisp_Object dir; |
| 637 | unsigned char *str = 0; |
| 638 | int len; |
| 639 | |
| 640 | saved_handlers[0].code = SIGINT; |
| 641 | saved_handlers[1].code = SIGQUIT; |
| 642 | saved_handlers[2].code = SIGTERM; |
| 643 | #ifdef SIGIO |
| 644 | saved_handlers[3].code = SIGIO; |
| 645 | saved_handlers[4].code = 0; |
| 646 | #else |
| 647 | saved_handlers[3].code = 0; |
| 648 | #endif |
| 649 | |
| 650 | /* Mentioning current_buffer->buffer would mean including buffer.h, |
| 651 | which somehow wedges the hp compiler. So instead... */ |
| 652 | |
| 653 | dir = intern ("default-directory"); |
| 654 | if (NILP (Fboundp (dir))) |
| 655 | goto xyzzy; |
| 656 | dir = Fsymbol_value (dir); |
| 657 | if (!STRINGP (dir)) |
| 658 | goto xyzzy; |
| 659 | |
| 660 | dir = expand_and_dir_to_file (Funhandled_file_name_directory (dir), Qnil); |
| 661 | str = (unsigned char *) alloca (SCHARS (dir) + 2); |
| 662 | len = SCHARS (dir); |
| 663 | bcopy (SDATA (dir), str, len); |
| 664 | if (str[len - 1] != '/') str[len++] = '/'; |
| 665 | str[len] = 0; |
| 666 | xyzzy: |
| 667 | |
| 668 | #ifdef DOS_NT |
| 669 | pid = 0; |
| 670 | save_signal_handlers (saved_handlers); |
| 671 | synch_process_alive = 1; |
| 672 | #else |
| 673 | pid = vfork (); |
| 674 | if (pid == -1) |
| 675 | error ("Can't spawn subshell"); |
| 676 | #endif |
| 677 | |
| 678 | if (pid == 0) |
| 679 | { |
| 680 | char *sh = 0; |
| 681 | |
| 682 | #ifdef DOS_NT /* MW, Aug 1993 */ |
| 683 | getwd (oldwd); |
| 684 | if (sh == 0) |
| 685 | sh = (char *) egetenv ("SUSPEND"); /* KFS, 1994-12-14 */ |
| 686 | #endif |
| 687 | if (sh == 0) |
| 688 | sh = (char *) egetenv ("SHELL"); |
| 689 | if (sh == 0) |
| 690 | sh = "sh"; |
| 691 | |
| 692 | /* Use our buffer's default directory for the subshell. */ |
| 693 | if (str) |
| 694 | chdir ((char *) str); |
| 695 | |
| 696 | #ifdef subprocesses |
| 697 | close_process_descs (); /* Close Emacs's pipes/ptys */ |
| 698 | #endif |
| 699 | |
| 700 | #ifdef SET_EMACS_PRIORITY |
| 701 | { |
| 702 | extern EMACS_INT emacs_priority; |
| 703 | |
| 704 | if (emacs_priority < 0) |
| 705 | nice (-emacs_priority); |
| 706 | } |
| 707 | #endif |
| 708 | |
| 709 | #ifdef MSDOS /* Demacs 1.1.2 91/10/20 Manabu Higashida */ |
| 710 | { |
| 711 | char *epwd = getenv ("PWD"); |
| 712 | char old_pwd[MAXPATHLEN+1+4]; |
| 713 | |
| 714 | /* If PWD is set, pass it with corrected value. */ |
| 715 | if (epwd) |
| 716 | { |
| 717 | strcpy (old_pwd, epwd); |
| 718 | if (str[len - 1] == '/') |
| 719 | str[len - 1] = '\0'; |
| 720 | setenv ("PWD", str, 1); |
| 721 | } |
| 722 | st = system (sh); |
| 723 | chdir (oldwd); |
| 724 | if (epwd) |
| 725 | putenv (old_pwd); /* restore previous value */ |
| 726 | } |
| 727 | #else /* not MSDOS */ |
| 728 | #ifdef WINDOWSNT |
| 729 | /* Waits for process completion */ |
| 730 | pid = _spawnlp (_P_WAIT, sh, sh, NULL); |
| 731 | chdir (oldwd); |
| 732 | if (pid == -1) |
| 733 | write (1, "Can't execute subshell", 22); |
| 734 | #else /* not WINDOWSNT */ |
| 735 | execlp (sh, sh, (char *) 0); |
| 736 | write (1, "Can't execute subshell", 22); |
| 737 | _exit (1); |
| 738 | #endif /* not WINDOWSNT */ |
| 739 | #endif /* not MSDOS */ |
| 740 | } |
| 741 | |
| 742 | /* Do this now if we did not do it before. */ |
| 743 | #ifndef MSDOS |
| 744 | save_signal_handlers (saved_handlers); |
| 745 | synch_process_alive = 1; |
| 746 | #endif |
| 747 | |
| 748 | #ifndef DOS_NT |
| 749 | wait_for_termination (pid); |
| 750 | #endif |
| 751 | restore_signal_handlers (saved_handlers); |
| 752 | synch_process_alive = 0; |
| 753 | } |
| 754 | |
| 755 | static void |
| 756 | save_signal_handlers (saved_handlers) |
| 757 | struct save_signal *saved_handlers; |
| 758 | { |
| 759 | while (saved_handlers->code) |
| 760 | { |
| 761 | saved_handlers->handler |
| 762 | = (SIGTYPE (*) P_ ((int))) signal (saved_handlers->code, SIG_IGN); |
| 763 | saved_handlers++; |
| 764 | } |
| 765 | } |
| 766 | |
| 767 | static void |
| 768 | restore_signal_handlers (saved_handlers) |
| 769 | struct save_signal *saved_handlers; |
| 770 | { |
| 771 | while (saved_handlers->code) |
| 772 | { |
| 773 | signal (saved_handlers->code, saved_handlers->handler); |
| 774 | saved_handlers++; |
| 775 | } |
| 776 | } |
| 777 | \f |
| 778 | #ifndef SIGIO |
| 779 | /* If SIGIO is broken, don't do anything. */ |
| 780 | void |
| 781 | init_sigio (int fd) |
| 782 | { |
| 783 | } |
| 784 | |
| 785 | void |
| 786 | reset_sigio (int fd) |
| 787 | { |
| 788 | } |
| 789 | |
| 790 | void |
| 791 | request_sigio (void) |
| 792 | { |
| 793 | } |
| 794 | |
| 795 | void |
| 796 | unrequest_sigio (void) |
| 797 | { |
| 798 | } |
| 799 | |
| 800 | #else |
| 801 | #ifdef F_SETFL |
| 802 | |
| 803 | int old_fcntl_flags[MAXDESC]; |
| 804 | |
| 805 | void |
| 806 | init_sigio (fd) |
| 807 | int fd; |
| 808 | { |
| 809 | #ifdef FASYNC |
| 810 | old_fcntl_flags[fd] = fcntl (fd, F_GETFL, 0) & ~FASYNC; |
| 811 | fcntl (fd, F_SETFL, old_fcntl_flags[fd] | FASYNC); |
| 812 | #endif |
| 813 | interrupts_deferred = 0; |
| 814 | } |
| 815 | |
| 816 | void |
| 817 | reset_sigio (fd) |
| 818 | int fd; |
| 819 | { |
| 820 | #ifdef FASYNC |
| 821 | fcntl (fd, F_SETFL, old_fcntl_flags[fd]); |
| 822 | #endif |
| 823 | } |
| 824 | |
| 825 | #ifdef FASYNC /* F_SETFL does not imply existence of FASYNC */ |
| 826 | /* XXX Uhm, FASYNC is not used anymore here. */ |
| 827 | /* XXX Yeah, but you need it for SIGIO, don't you? */ |
| 828 | |
| 829 | void |
| 830 | request_sigio () |
| 831 | { |
| 832 | if (noninteractive) |
| 833 | return; |
| 834 | |
| 835 | #ifdef SIGWINCH |
| 836 | sigunblock (sigmask (SIGWINCH)); |
| 837 | #endif |
| 838 | sigunblock (sigmask (SIGIO)); |
| 839 | |
| 840 | interrupts_deferred = 0; |
| 841 | } |
| 842 | |
| 843 | void |
| 844 | unrequest_sigio (void) |
| 845 | { |
| 846 | if (noninteractive) |
| 847 | return; |
| 848 | |
| 849 | #if 0 /* XXX What's wrong with blocking SIGIO under X? */ |
| 850 | if (x_display_list) |
| 851 | return; |
| 852 | #endif |
| 853 | |
| 854 | #ifdef SIGWINCH |
| 855 | sigblock (sigmask (SIGWINCH)); |
| 856 | #endif |
| 857 | sigblock (sigmask (SIGIO)); |
| 858 | interrupts_deferred = 1; |
| 859 | } |
| 860 | |
| 861 | #else /* no FASYNC */ |
| 862 | #ifndef MSDOS |
| 863 | |
| 864 | void |
| 865 | request_sigio () |
| 866 | { |
| 867 | if (noninteractive || read_socket_hook) |
| 868 | return; |
| 869 | |
| 870 | croak ("request_sigio"); |
| 871 | } |
| 872 | |
| 873 | void |
| 874 | unrequest_sigio () |
| 875 | { |
| 876 | if (noninteractive || read_socket_hook) |
| 877 | return; |
| 878 | |
| 879 | croak ("unrequest_sigio"); |
| 880 | } |
| 881 | |
| 882 | #endif /* MSDOS */ |
| 883 | #endif /* FASYNC */ |
| 884 | #endif /* F_SETFL */ |
| 885 | #endif /* SIGIO */ |
| 886 | \f |
| 887 | /* Saving and restoring the process group of Emacs's terminal. */ |
| 888 | |
| 889 | #ifdef BSD_PGRPS |
| 890 | |
| 891 | /* The process group of which Emacs was a member when it initially |
| 892 | started. |
| 893 | |
| 894 | If Emacs was in its own process group (i.e. inherited_pgroup == |
| 895 | getpid ()), then we know we're running under a shell with job |
| 896 | control (Emacs would never be run as part of a pipeline). |
| 897 | Everything is fine. |
| 898 | |
| 899 | If Emacs was not in its own process group, then we know we're |
| 900 | running under a shell (or a caller) that doesn't know how to |
| 901 | separate itself from Emacs (like sh). Emacs must be in its own |
| 902 | process group in order to receive SIGIO correctly. In this |
| 903 | situation, we put ourselves in our own pgroup, forcibly set the |
| 904 | tty's pgroup to our pgroup, and make sure to restore and reinstate |
| 905 | the tty's pgroup just like any other terminal setting. If |
| 906 | inherited_group was not the tty's pgroup, then we'll get a |
| 907 | SIGTTmumble when we try to change the tty's pgroup, and a CONT if |
| 908 | it goes foreground in the future, which is what should happen. |
| 909 | |
| 910 | This variable is initialized in emacs.c. */ |
| 911 | int inherited_pgroup; |
| 912 | |
| 913 | /* Split off the foreground process group to Emacs alone. When we are |
| 914 | in the foreground, but not started in our own process group, |
| 915 | redirect the tty device handle FD to point to our own process |
| 916 | group. We need to be in our own process group to receive SIGIO |
| 917 | properly. */ |
| 918 | static void |
| 919 | narrow_foreground_group (int fd) |
| 920 | { |
| 921 | int me = getpid (); |
| 922 | |
| 923 | setpgrp (0, inherited_pgroup); |
| 924 | #if 0 |
| 925 | /* XXX inherited_pgroup should not be zero here, but GTK seems to |
| 926 | mess this up. */ |
| 927 | if (! inherited_pgroup) |
| 928 | abort (); /* Should not happen. */ |
| 929 | #endif |
| 930 | if (inherited_pgroup != me) |
| 931 | EMACS_SET_TTY_PGRP (fd, &me); /* XXX This only works on the controlling tty. */ |
| 932 | setpgrp (0, me); |
| 933 | } |
| 934 | |
| 935 | /* Set the tty to our original foreground group. */ |
| 936 | static void |
| 937 | widen_foreground_group (int fd) |
| 938 | { |
| 939 | if (inherited_pgroup != getpid ()) |
| 940 | EMACS_SET_TTY_PGRP (fd, &inherited_pgroup); |
| 941 | setpgrp (0, inherited_pgroup); |
| 942 | } |
| 943 | |
| 944 | #endif /* BSD_PGRPS */ |
| 945 | \f |
| 946 | /* Getting and setting emacs_tty structures. */ |
| 947 | |
| 948 | /* Set *TC to the parameters associated with the terminal FD. |
| 949 | Return zero if all's well, or -1 if we ran into an error we |
| 950 | couldn't deal with. */ |
| 951 | int |
| 952 | emacs_get_tty (fd, settings) |
| 953 | int fd; |
| 954 | struct emacs_tty *settings; |
| 955 | { |
| 956 | /* Retrieve the primary parameters - baud rate, character size, etcetera. */ |
| 957 | #ifdef HAVE_TCATTR |
| 958 | /* We have those nifty POSIX tcmumbleattr functions. */ |
| 959 | bzero (&settings->main, sizeof (settings->main)); |
| 960 | if (tcgetattr (fd, &settings->main) < 0) |
| 961 | return -1; |
| 962 | |
| 963 | #else |
| 964 | #ifdef HAVE_TERMIO |
| 965 | /* The SYSV-style interface? */ |
| 966 | if (ioctl (fd, TCGETA, &settings->main) < 0) |
| 967 | return -1; |
| 968 | |
| 969 | #else |
| 970 | #ifndef DOS_NT |
| 971 | /* I give up - I hope you have the BSD ioctls. */ |
| 972 | if (ioctl (fd, TIOCGETP, &settings->main) < 0) |
| 973 | return -1; |
| 974 | #endif /* not DOS_NT */ |
| 975 | #endif |
| 976 | #endif |
| 977 | |
| 978 | /* Suivant - Do we have to get struct ltchars data? */ |
| 979 | #ifdef HAVE_LTCHARS |
| 980 | if (ioctl (fd, TIOCGLTC, &settings->ltchars) < 0) |
| 981 | return -1; |
| 982 | #endif |
| 983 | |
| 984 | /* How about a struct tchars and a wordful of lmode bits? */ |
| 985 | #ifdef HAVE_TCHARS |
| 986 | if (ioctl (fd, TIOCGETC, &settings->tchars) < 0 |
| 987 | || ioctl (fd, TIOCLGET, &settings->lmode) < 0) |
| 988 | return -1; |
| 989 | #endif |
| 990 | |
| 991 | /* We have survived the tempest. */ |
| 992 | return 0; |
| 993 | } |
| 994 | |
| 995 | |
| 996 | /* Set the parameters of the tty on FD according to the contents of |
| 997 | *SETTINGS. If FLUSHP is non-zero, we discard input. |
| 998 | Return 0 if all went well, and -1 if anything failed. */ |
| 999 | |
| 1000 | int |
| 1001 | emacs_set_tty (fd, settings, flushp) |
| 1002 | int fd; |
| 1003 | struct emacs_tty *settings; |
| 1004 | int flushp; |
| 1005 | { |
| 1006 | /* Set the primary parameters - baud rate, character size, etcetera. */ |
| 1007 | #ifdef HAVE_TCATTR |
| 1008 | int i; |
| 1009 | /* We have those nifty POSIX tcmumbleattr functions. |
| 1010 | William J. Smith <wjs@wiis.wang.com> writes: |
| 1011 | "POSIX 1003.1 defines tcsetattr to return success if it was |
| 1012 | able to perform any of the requested actions, even if some |
| 1013 | of the requested actions could not be performed. |
| 1014 | We must read settings back to ensure tty setup properly. |
| 1015 | AIX requires this to keep tty from hanging occasionally." */ |
| 1016 | /* This make sure that we don't loop indefinitely in here. */ |
| 1017 | for (i = 0 ; i < 10 ; i++) |
| 1018 | if (tcsetattr (fd, flushp ? TCSAFLUSH : TCSADRAIN, &settings->main) < 0) |
| 1019 | { |
| 1020 | if (errno == EINTR) |
| 1021 | continue; |
| 1022 | else |
| 1023 | return -1; |
| 1024 | } |
| 1025 | else |
| 1026 | { |
| 1027 | struct termios new; |
| 1028 | |
| 1029 | bzero (&new, sizeof (new)); |
| 1030 | /* Get the current settings, and see if they're what we asked for. */ |
| 1031 | tcgetattr (fd, &new); |
| 1032 | /* We cannot use memcmp on the whole structure here because under |
| 1033 | * aix386 the termios structure has some reserved field that may |
| 1034 | * not be filled in. |
| 1035 | */ |
| 1036 | if ( new.c_iflag == settings->main.c_iflag |
| 1037 | && new.c_oflag == settings->main.c_oflag |
| 1038 | && new.c_cflag == settings->main.c_cflag |
| 1039 | && new.c_lflag == settings->main.c_lflag |
| 1040 | && memcmp (new.c_cc, settings->main.c_cc, NCCS) == 0) |
| 1041 | break; |
| 1042 | else |
| 1043 | continue; |
| 1044 | } |
| 1045 | |
| 1046 | #else |
| 1047 | #ifdef HAVE_TERMIO |
| 1048 | /* The SYSV-style interface? */ |
| 1049 | if (ioctl (fd, flushp ? TCSETAF : TCSETAW, &settings->main) < 0) |
| 1050 | return -1; |
| 1051 | |
| 1052 | #else |
| 1053 | #ifndef DOS_NT |
| 1054 | /* I give up - I hope you have the BSD ioctls. */ |
| 1055 | if (ioctl (fd, (flushp) ? TIOCSETP : TIOCSETN, &settings->main) < 0) |
| 1056 | return -1; |
| 1057 | #endif /* not DOS_NT */ |
| 1058 | |
| 1059 | #endif |
| 1060 | #endif |
| 1061 | |
| 1062 | /* Suivant - Do we have to get struct ltchars data? */ |
| 1063 | #ifdef HAVE_LTCHARS |
| 1064 | if (ioctl (fd, TIOCSLTC, &settings->ltchars) < 0) |
| 1065 | return -1; |
| 1066 | #endif |
| 1067 | |
| 1068 | /* How about a struct tchars and a wordful of lmode bits? */ |
| 1069 | #ifdef HAVE_TCHARS |
| 1070 | if (ioctl (fd, TIOCSETC, &settings->tchars) < 0 |
| 1071 | || ioctl (fd, TIOCLSET, &settings->lmode) < 0) |
| 1072 | return -1; |
| 1073 | #endif |
| 1074 | |
| 1075 | /* We have survived the tempest. */ |
| 1076 | return 0; |
| 1077 | } |
| 1078 | |
| 1079 | \f |
| 1080 | |
| 1081 | #ifdef F_SETOWN |
| 1082 | int old_fcntl_owner[MAXDESC]; |
| 1083 | #endif /* F_SETOWN */ |
| 1084 | |
| 1085 | /* This may also be defined in stdio, |
| 1086 | but if so, this does no harm, |
| 1087 | and using the same name avoids wasting the other one's space. */ |
| 1088 | |
| 1089 | #if defined (USG) |
| 1090 | unsigned char _sobuf[BUFSIZ+8]; |
| 1091 | #else |
| 1092 | char _sobuf[BUFSIZ]; |
| 1093 | #endif |
| 1094 | |
| 1095 | #ifdef HAVE_LTCHARS |
| 1096 | static struct ltchars new_ltchars = {-1,-1,-1,-1,-1,-1}; |
| 1097 | #endif |
| 1098 | #ifdef HAVE_TCHARS |
| 1099 | static struct tchars new_tchars = {-1,-1,-1,-1,-1,-1}; |
| 1100 | #endif |
| 1101 | |
| 1102 | /* Initialize the terminal mode on all tty devices that are currently |
| 1103 | open. */ |
| 1104 | |
| 1105 | void |
| 1106 | init_all_sys_modes (void) |
| 1107 | { |
| 1108 | struct tty_display_info *tty; |
| 1109 | for (tty = tty_list; tty; tty = tty->next) |
| 1110 | init_sys_modes (tty); |
| 1111 | } |
| 1112 | |
| 1113 | /* Initialize the terminal mode on the given tty device. */ |
| 1114 | |
| 1115 | void |
| 1116 | init_sys_modes (tty_out) |
| 1117 | struct tty_display_info *tty_out; |
| 1118 | { |
| 1119 | struct emacs_tty tty; |
| 1120 | |
| 1121 | Vtty_erase_char = Qnil; |
| 1122 | |
| 1123 | if (noninteractive) |
| 1124 | return; |
| 1125 | |
| 1126 | if (!tty_out->output) |
| 1127 | return; /* The tty is suspended. */ |
| 1128 | |
| 1129 | #ifdef BSD_PGRPS |
| 1130 | #if 0 |
| 1131 | /* read_socket_hook is not global anymore. I think doing this |
| 1132 | unconditionally will not cause any problems. */ |
| 1133 | if (! read_socket_hook && EQ (Vinitial_window_system, Qnil)) |
| 1134 | #endif |
| 1135 | narrow_foreground_group (fileno (tty_out->input)); |
| 1136 | #endif |
| 1137 | |
| 1138 | if (! tty_out->old_tty) |
| 1139 | tty_out->old_tty = (struct emacs_tty *) xmalloc (sizeof (struct emacs_tty)); |
| 1140 | |
| 1141 | EMACS_GET_TTY (fileno (tty_out->input), tty_out->old_tty); |
| 1142 | |
| 1143 | tty = *tty_out->old_tty; |
| 1144 | |
| 1145 | #if defined (HAVE_TERMIO) || defined (HAVE_TERMIOS) |
| 1146 | XSETINT (Vtty_erase_char, tty.main.c_cc[VERASE]); |
| 1147 | |
| 1148 | tty.main.c_iflag |= (IGNBRK); /* Ignore break condition */ |
| 1149 | tty.main.c_iflag &= ~ICRNL; /* Disable map of CR to NL on input */ |
| 1150 | #ifdef INLCR /* I'm just being cautious, |
| 1151 | since I can't check how widespread INLCR is--rms. */ |
| 1152 | tty.main.c_iflag &= ~INLCR; /* Disable map of NL to CR on input */ |
| 1153 | #endif |
| 1154 | #ifdef ISTRIP |
| 1155 | tty.main.c_iflag &= ~ISTRIP; /* don't strip 8th bit on input */ |
| 1156 | #endif |
| 1157 | tty.main.c_lflag &= ~ECHO; /* Disable echo */ |
| 1158 | tty.main.c_lflag &= ~ICANON; /* Disable erase/kill processing */ |
| 1159 | #ifdef IEXTEN |
| 1160 | tty.main.c_lflag &= ~IEXTEN; /* Disable other editing characters. */ |
| 1161 | #endif |
| 1162 | tty.main.c_lflag |= ISIG; /* Enable signals */ |
| 1163 | if (tty_out->flow_control) |
| 1164 | { |
| 1165 | tty.main.c_iflag |= IXON; /* Enable start/stop output control */ |
| 1166 | #ifdef IXANY |
| 1167 | tty.main.c_iflag &= ~IXANY; |
| 1168 | #endif /* IXANY */ |
| 1169 | } |
| 1170 | else |
| 1171 | tty.main.c_iflag &= ~IXON; /* Disable start/stop output control */ |
| 1172 | tty.main.c_oflag &= ~ONLCR; /* Disable map of NL to CR-NL |
| 1173 | on output */ |
| 1174 | tty.main.c_oflag &= ~TAB3; /* Disable tab expansion */ |
| 1175 | #ifdef CS8 |
| 1176 | if (tty_out->meta_key) |
| 1177 | { |
| 1178 | tty.main.c_cflag |= CS8; /* allow 8th bit on input */ |
| 1179 | tty.main.c_cflag &= ~PARENB;/* Don't check parity */ |
| 1180 | } |
| 1181 | #endif |
| 1182 | if (tty_out->input == stdin) |
| 1183 | { |
| 1184 | tty.main.c_cc[VINTR] = quit_char; /* C-g (usually) gives SIGINT */ |
| 1185 | /* Set up C-g for both SIGQUIT and SIGINT. |
| 1186 | We don't know which we will get, but we handle both alike |
| 1187 | so which one it really gives us does not matter. */ |
| 1188 | tty.main.c_cc[VQUIT] = quit_char; |
| 1189 | } |
| 1190 | else |
| 1191 | { |
| 1192 | /* We normally don't get interrupt or quit signals from tty |
| 1193 | devices other than our controlling terminal; therefore, |
| 1194 | we must handle C-g as normal input. Unfortunately, this |
| 1195 | means that the interrupt and quit feature must be |
| 1196 | disabled on secondary ttys, or we would not even see the |
| 1197 | keypress. |
| 1198 | |
| 1199 | Note that even though emacsclient could have special code |
| 1200 | to pass SIGINT to Emacs, we should _not_ enable |
| 1201 | interrupt/quit keys for emacsclient frames. This means |
| 1202 | that we can't break out of loops in C code from a |
| 1203 | secondary tty frame, but we can always decide what |
| 1204 | display the C-g came from, which is more important from a |
| 1205 | usability point of view. (Consider the case when two |
| 1206 | people work together using the same Emacs instance.) */ |
| 1207 | tty.main.c_cc[VINTR] = CDISABLE; |
| 1208 | tty.main.c_cc[VQUIT] = CDISABLE; |
| 1209 | } |
| 1210 | tty.main.c_cc[VMIN] = 1; /* Input should wait for at least 1 char */ |
| 1211 | tty.main.c_cc[VTIME] = 0; /* no matter how long that takes. */ |
| 1212 | #ifdef VSWTCH |
| 1213 | tty.main.c_cc[VSWTCH] = CDISABLE; /* Turn off shell layering use |
| 1214 | of C-z */ |
| 1215 | #endif /* VSWTCH */ |
| 1216 | |
| 1217 | #if defined (__mips__) || defined (HAVE_TCATTR) |
| 1218 | #ifdef VSUSP |
| 1219 | tty.main.c_cc[VSUSP] = CDISABLE; /* Turn off mips handling of C-z. */ |
| 1220 | #endif /* VSUSP */ |
| 1221 | #ifdef V_DSUSP |
| 1222 | tty.main.c_cc[V_DSUSP] = CDISABLE; /* Turn off mips handling of C-y. */ |
| 1223 | #endif /* V_DSUSP */ |
| 1224 | #ifdef VDSUSP /* Some systems have VDSUSP, some have V_DSUSP. */ |
| 1225 | tty.main.c_cc[VDSUSP] = CDISABLE; |
| 1226 | #endif /* VDSUSP */ |
| 1227 | #ifdef VLNEXT |
| 1228 | tty.main.c_cc[VLNEXT] = CDISABLE; |
| 1229 | #endif /* VLNEXT */ |
| 1230 | #ifdef VREPRINT |
| 1231 | tty.main.c_cc[VREPRINT] = CDISABLE; |
| 1232 | #endif /* VREPRINT */ |
| 1233 | #ifdef VWERASE |
| 1234 | tty.main.c_cc[VWERASE] = CDISABLE; |
| 1235 | #endif /* VWERASE */ |
| 1236 | #ifdef VDISCARD |
| 1237 | tty.main.c_cc[VDISCARD] = CDISABLE; |
| 1238 | #endif /* VDISCARD */ |
| 1239 | |
| 1240 | if (tty_out->flow_control) |
| 1241 | { |
| 1242 | #ifdef VSTART |
| 1243 | tty.main.c_cc[VSTART] = '\021'; |
| 1244 | #endif /* VSTART */ |
| 1245 | #ifdef VSTOP |
| 1246 | tty.main.c_cc[VSTOP] = '\023'; |
| 1247 | #endif /* VSTOP */ |
| 1248 | } |
| 1249 | else |
| 1250 | { |
| 1251 | #ifdef VSTART |
| 1252 | tty.main.c_cc[VSTART] = CDISABLE; |
| 1253 | #endif /* VSTART */ |
| 1254 | #ifdef VSTOP |
| 1255 | tty.main.c_cc[VSTOP] = CDISABLE; |
| 1256 | #endif /* VSTOP */ |
| 1257 | } |
| 1258 | #endif /* mips or HAVE_TCATTR */ |
| 1259 | |
| 1260 | #ifdef AIX |
| 1261 | #ifndef IBMR2AIX |
| 1262 | /* AIX enhanced edit loses NULs, so disable it. */ |
| 1263 | tty.main.c_line = 0; |
| 1264 | tty.main.c_iflag &= ~ASCEDIT; |
| 1265 | #else |
| 1266 | tty.main.c_cc[VSTRT] = CDISABLE; |
| 1267 | tty.main.c_cc[VSTOP] = CDISABLE; |
| 1268 | tty.main.c_cc[VSUSP] = CDISABLE; |
| 1269 | tty.main.c_cc[VDSUSP] = CDISABLE; |
| 1270 | #endif /* IBMR2AIX */ |
| 1271 | if (tty_out->flow_control) |
| 1272 | { |
| 1273 | #ifdef VSTART |
| 1274 | tty.main.c_cc[VSTART] = '\021'; |
| 1275 | #endif /* VSTART */ |
| 1276 | #ifdef VSTOP |
| 1277 | tty.main.c_cc[VSTOP] = '\023'; |
| 1278 | #endif /* VSTOP */ |
| 1279 | } |
| 1280 | /* Also, PTY overloads NUL and BREAK. |
| 1281 | don't ignore break, but don't signal either, so it looks like NUL. |
| 1282 | This really serves a purpose only if running in an XTERM window |
| 1283 | or via TELNET or the like, but does no harm elsewhere. */ |
| 1284 | tty.main.c_iflag &= ~IGNBRK; |
| 1285 | tty.main.c_iflag &= ~BRKINT; |
| 1286 | #endif |
| 1287 | #else /* if not HAVE_TERMIO */ |
| 1288 | #ifndef DOS_NT |
| 1289 | XSETINT (Vtty_erase_char, tty.main.sg_erase); |
| 1290 | tty.main.sg_flags &= ~(ECHO | CRMOD | XTABS); |
| 1291 | if (meta_key) |
| 1292 | tty.main.sg_flags |= ANYP; |
| 1293 | tty.main.sg_flags |= interrupt_input ? RAW : CBREAK; |
| 1294 | #endif /* not DOS_NT */ |
| 1295 | #endif /* not HAVE_TERMIO */ |
| 1296 | |
| 1297 | /* If going to use CBREAK mode, we must request C-g to interrupt |
| 1298 | and turn off start and stop chars, etc. If not going to use |
| 1299 | CBREAK mode, do this anyway so as to turn off local flow |
| 1300 | control for user coming over network on 4.2; in this case, |
| 1301 | only t_stopc and t_startc really matter. */ |
| 1302 | #ifndef HAVE_TERMIO |
| 1303 | #ifdef HAVE_TCHARS |
| 1304 | /* Note: if not using CBREAK mode, it makes no difference how we |
| 1305 | set this */ |
| 1306 | tty.tchars = new_tchars; |
| 1307 | tty.tchars.t_intrc = quit_char; |
| 1308 | if (tty_out->flow_control) |
| 1309 | { |
| 1310 | tty.tchars.t_startc = '\021'; |
| 1311 | tty.tchars.t_stopc = '\023'; |
| 1312 | } |
| 1313 | |
| 1314 | tty.lmode = LDECCTQ | LLITOUT | LPASS8 | LNOFLSH | tty_out->old_tty.lmode; |
| 1315 | |
| 1316 | #endif /* HAVE_TCHARS */ |
| 1317 | #endif /* not HAVE_TERMIO */ |
| 1318 | |
| 1319 | #ifdef HAVE_LTCHARS |
| 1320 | tty.ltchars = new_ltchars; |
| 1321 | #endif /* HAVE_LTCHARS */ |
| 1322 | #ifdef MSDOS /* Demacs 1.1.2 91/10/20 Manabu Higashida, MW Aug 1993 */ |
| 1323 | if (!tty_out->term_initted) |
| 1324 | internal_terminal_init (); |
| 1325 | dos_ttraw (tty_out); |
| 1326 | #endif |
| 1327 | |
| 1328 | EMACS_SET_TTY (fileno (tty_out->input), &tty, 0); |
| 1329 | |
| 1330 | /* This code added to insure that, if flow-control is not to be used, |
| 1331 | we have an unlocked terminal at the start. */ |
| 1332 | |
| 1333 | #ifdef TCXONC |
| 1334 | if (!tty_out->flow_control) ioctl (fileno (tty_out->input), TCXONC, 1); |
| 1335 | #endif |
| 1336 | #ifdef TIOCSTART |
| 1337 | if (!tty_out->flow_control) ioctl (fileno (tty_out->input), TIOCSTART, 0); |
| 1338 | #endif |
| 1339 | |
| 1340 | #if defined (HAVE_TERMIOS) || defined (HPUX) |
| 1341 | #ifdef TCOON |
| 1342 | if (!tty_out->flow_control) tcflow (fileno (tty_out->input), TCOON); |
| 1343 | #endif |
| 1344 | #endif |
| 1345 | |
| 1346 | #ifdef F_SETFL |
| 1347 | #ifdef F_GETOWN /* F_SETFL does not imply existence of F_GETOWN */ |
| 1348 | if (interrupt_input) |
| 1349 | { |
| 1350 | old_fcntl_owner[fileno (tty_out->input)] = |
| 1351 | fcntl (fileno (tty_out->input), F_GETOWN, 0); |
| 1352 | fcntl (fileno (tty_out->input), F_SETOWN, getpid ()); |
| 1353 | init_sigio (fileno (tty_out->input)); |
| 1354 | #ifdef HAVE_GPM |
| 1355 | if (gpm_tty == tty_out) |
| 1356 | { |
| 1357 | /* Arrange for mouse events to give us SIGIO signals. */ |
| 1358 | fcntl (gpm_fd, F_SETOWN, getpid ()); |
| 1359 | fcntl (gpm_fd, F_SETFL, fcntl (gpm_fd, F_GETFL, 0) | O_NONBLOCK); |
| 1360 | init_sigio (gpm_fd); |
| 1361 | } |
| 1362 | #endif /* HAVE_GPM */ |
| 1363 | } |
| 1364 | #endif /* F_GETOWN */ |
| 1365 | #endif /* F_SETFL */ |
| 1366 | |
| 1367 | #ifdef _IOFBF |
| 1368 | /* This symbol is defined on recent USG systems. |
| 1369 | Someone says without this call USG won't really buffer the file |
| 1370 | even with a call to setbuf. */ |
| 1371 | setvbuf (tty_out->output, (char *) _sobuf, _IOFBF, sizeof _sobuf); |
| 1372 | #else |
| 1373 | setbuf (tty_out->output, (char *) _sobuf); |
| 1374 | #endif |
| 1375 | |
| 1376 | if (tty_out->terminal->set_terminal_modes_hook) |
| 1377 | tty_out->terminal->set_terminal_modes_hook (tty_out->terminal); |
| 1378 | |
| 1379 | if (!tty_out->term_initted) |
| 1380 | { |
| 1381 | Lisp_Object tail, frame; |
| 1382 | FOR_EACH_FRAME (tail, frame) |
| 1383 | { |
| 1384 | /* XXX This needs to be revised. */ |
| 1385 | if (FRAME_TERMCAP_P (XFRAME (frame)) |
| 1386 | && FRAME_TTY (XFRAME (frame)) == tty_out) |
| 1387 | init_frame_faces (XFRAME (frame)); |
| 1388 | } |
| 1389 | } |
| 1390 | |
| 1391 | if (tty_out->term_initted && no_redraw_on_reenter) |
| 1392 | { |
| 1393 | /* We used to call "direct_output_forward_char(0)" here, |
| 1394 | but it's not clear why, since it may not do anything anyway. */ |
| 1395 | } |
| 1396 | else |
| 1397 | { |
| 1398 | Lisp_Object tail, frame; |
| 1399 | frame_garbaged = 1; |
| 1400 | FOR_EACH_FRAME (tail, frame) |
| 1401 | { |
| 1402 | if ((FRAME_TERMCAP_P (XFRAME (frame)) |
| 1403 | || FRAME_MSDOS_P (XFRAME (frame))) |
| 1404 | && FRAME_TTY (XFRAME (frame)) == tty_out) |
| 1405 | FRAME_GARBAGED_P (XFRAME (frame)) = 1; |
| 1406 | } |
| 1407 | } |
| 1408 | |
| 1409 | tty_out->term_initted = 1; |
| 1410 | } |
| 1411 | |
| 1412 | /* Return nonzero if safe to use tabs in output. |
| 1413 | At the time this is called, init_sys_modes has not been done yet. */ |
| 1414 | |
| 1415 | int |
| 1416 | tabs_safe_p (int fd) |
| 1417 | { |
| 1418 | struct emacs_tty etty; |
| 1419 | |
| 1420 | EMACS_GET_TTY (fd, &etty); |
| 1421 | return EMACS_TTY_TABS_OK (&etty); |
| 1422 | } |
| 1423 | \f |
| 1424 | /* Get terminal size from system. |
| 1425 | Store number of lines into *HEIGHTP and width into *WIDTHP. |
| 1426 | We store 0 if there's no valid information. */ |
| 1427 | |
| 1428 | void |
| 1429 | get_tty_size (int fd, int *widthp, int *heightp) |
| 1430 | { |
| 1431 | |
| 1432 | #ifdef TIOCGWINSZ |
| 1433 | |
| 1434 | /* BSD-style. */ |
| 1435 | struct winsize size; |
| 1436 | |
| 1437 | if (ioctl (fd, TIOCGWINSZ, &size) == -1) |
| 1438 | *widthp = *heightp = 0; |
| 1439 | else |
| 1440 | { |
| 1441 | *widthp = size.ws_col; |
| 1442 | *heightp = size.ws_row; |
| 1443 | } |
| 1444 | |
| 1445 | #else |
| 1446 | #ifdef TIOCGSIZE |
| 1447 | |
| 1448 | /* SunOS - style. */ |
| 1449 | struct ttysize size; |
| 1450 | |
| 1451 | if (ioctl (fd, TIOCGSIZE, &size) == -1) |
| 1452 | *widthp = *heightp = 0; |
| 1453 | else |
| 1454 | { |
| 1455 | *widthp = size.ts_cols; |
| 1456 | *heightp = size.ts_lines; |
| 1457 | } |
| 1458 | |
| 1459 | #else |
| 1460 | #ifdef MSDOS |
| 1461 | *widthp = ScreenCols (); |
| 1462 | *heightp = ScreenRows (); |
| 1463 | #else /* system doesn't know size */ |
| 1464 | *widthp = 0; |
| 1465 | *heightp = 0; |
| 1466 | #endif |
| 1467 | #endif /* not SunOS-style */ |
| 1468 | #endif /* not BSD-style */ |
| 1469 | } |
| 1470 | |
| 1471 | /* Set the logical window size associated with descriptor FD |
| 1472 | to HEIGHT and WIDTH. This is used mainly with ptys. */ |
| 1473 | |
| 1474 | int |
| 1475 | set_window_size (fd, height, width) |
| 1476 | int fd, height, width; |
| 1477 | { |
| 1478 | #ifdef TIOCSWINSZ |
| 1479 | |
| 1480 | /* BSD-style. */ |
| 1481 | struct winsize size; |
| 1482 | size.ws_row = height; |
| 1483 | size.ws_col = width; |
| 1484 | |
| 1485 | if (ioctl (fd, TIOCSWINSZ, &size) == -1) |
| 1486 | return 0; /* error */ |
| 1487 | else |
| 1488 | return 1; |
| 1489 | |
| 1490 | #else |
| 1491 | #ifdef TIOCSSIZE |
| 1492 | |
| 1493 | /* SunOS - style. */ |
| 1494 | struct ttysize size; |
| 1495 | size.ts_lines = height; |
| 1496 | size.ts_cols = width; |
| 1497 | |
| 1498 | if (ioctl (fd, TIOCGSIZE, &size) == -1) |
| 1499 | return 0; |
| 1500 | else |
| 1501 | return 1; |
| 1502 | #else |
| 1503 | return -1; |
| 1504 | #endif /* not SunOS-style */ |
| 1505 | #endif /* not BSD-style */ |
| 1506 | } |
| 1507 | |
| 1508 | \f |
| 1509 | |
| 1510 | /* Prepare all terminal devices for exiting Emacs. */ |
| 1511 | |
| 1512 | void |
| 1513 | reset_all_sys_modes (void) |
| 1514 | { |
| 1515 | struct tty_display_info *tty; |
| 1516 | for (tty = tty_list; tty; tty = tty->next) |
| 1517 | reset_sys_modes (tty); |
| 1518 | } |
| 1519 | |
| 1520 | /* Prepare the terminal for closing it; move the cursor to the |
| 1521 | bottom of the frame, turn off interrupt-driven I/O, etc. */ |
| 1522 | |
| 1523 | void |
| 1524 | reset_sys_modes (tty_out) |
| 1525 | struct tty_display_info *tty_out; |
| 1526 | { |
| 1527 | if (noninteractive) |
| 1528 | { |
| 1529 | fflush (stdout); |
| 1530 | return; |
| 1531 | } |
| 1532 | if (!tty_out->term_initted) |
| 1533 | return; |
| 1534 | |
| 1535 | if (!tty_out->output) |
| 1536 | return; /* The tty is suspended. */ |
| 1537 | |
| 1538 | /* Go to and clear the last line of the terminal. */ |
| 1539 | |
| 1540 | cmgoto (tty_out, FrameRows (tty_out) - 1, 0); |
| 1541 | |
| 1542 | /* Code adapted from tty_clear_end_of_line. */ |
| 1543 | if (tty_out->TS_clr_line) |
| 1544 | { |
| 1545 | emacs_tputs (tty_out, tty_out->TS_clr_line, 1, cmputc); |
| 1546 | } |
| 1547 | else |
| 1548 | { /* have to do it the hard way */ |
| 1549 | int i; |
| 1550 | tty_turn_off_insert (tty_out); |
| 1551 | |
| 1552 | for (i = curX (tty_out); i < FrameCols (tty_out) - 1; i++) |
| 1553 | { |
| 1554 | fputc (' ', tty_out->output); |
| 1555 | } |
| 1556 | } |
| 1557 | |
| 1558 | cmgoto (tty_out, FrameRows (tty_out) - 1, 0); |
| 1559 | fflush (tty_out->output); |
| 1560 | |
| 1561 | if (tty_out->terminal->reset_terminal_modes_hook) |
| 1562 | tty_out->terminal->reset_terminal_modes_hook (tty_out->terminal); |
| 1563 | |
| 1564 | #ifdef BSD_SYSTEM |
| 1565 | /* Avoid possible loss of output when changing terminal modes. */ |
| 1566 | fsync (fileno (tty_out->output)); |
| 1567 | #endif |
| 1568 | |
| 1569 | #ifdef F_SETFL |
| 1570 | #ifdef F_SETOWN /* F_SETFL does not imply existence of F_SETOWN */ |
| 1571 | if (interrupt_input) |
| 1572 | { |
| 1573 | reset_sigio (fileno (tty_out->input)); |
| 1574 | fcntl (fileno (tty_out->input), F_SETOWN, |
| 1575 | old_fcntl_owner[fileno (tty_out->input)]); |
| 1576 | } |
| 1577 | #endif /* F_SETOWN */ |
| 1578 | #ifdef O_NDELAY |
| 1579 | fcntl (fileno (tty_out->input), F_SETFL, |
| 1580 | fcntl (fileno (tty_out->input), F_GETFL, 0) & ~O_NDELAY); |
| 1581 | #endif |
| 1582 | #endif /* F_SETFL */ |
| 1583 | |
| 1584 | if (tty_out->old_tty) |
| 1585 | while (EMACS_SET_TTY (fileno (tty_out->input), |
| 1586 | tty_out->old_tty, 0) < 0 && errno == EINTR) |
| 1587 | ; |
| 1588 | |
| 1589 | #ifdef MSDOS /* Demacs 1.1.2 91/10/20 Manabu Higashida */ |
| 1590 | dos_ttcooked (); |
| 1591 | #endif |
| 1592 | |
| 1593 | #ifdef BSD_PGRPS |
| 1594 | widen_foreground_group (fileno (tty_out->input)); |
| 1595 | #endif |
| 1596 | } |
| 1597 | \f |
| 1598 | #ifdef HAVE_PTYS |
| 1599 | |
| 1600 | /* Set up the proper status flags for use of a pty. */ |
| 1601 | |
| 1602 | void |
| 1603 | setup_pty (fd) |
| 1604 | int fd; |
| 1605 | { |
| 1606 | /* I'm told that TOICREMOTE does not mean control chars |
| 1607 | "can't be sent" but rather that they don't have |
| 1608 | input-editing or signaling effects. |
| 1609 | That should be good, because we have other ways |
| 1610 | to do those things in Emacs. |
| 1611 | However, telnet mode seems not to work on 4.2. |
| 1612 | So TIOCREMOTE is turned off now. */ |
| 1613 | |
| 1614 | /* Under hp-ux, if TIOCREMOTE is turned on, some calls |
| 1615 | will hang. In particular, the "timeout" feature (which |
| 1616 | causes a read to return if there is no data available) |
| 1617 | does this. Also it is known that telnet mode will hang |
| 1618 | in such a way that Emacs must be stopped (perhaps this |
| 1619 | is the same problem). |
| 1620 | |
| 1621 | If TIOCREMOTE is turned off, then there is a bug in |
| 1622 | hp-ux which sometimes loses data. Apparently the |
| 1623 | code which blocks the master process when the internal |
| 1624 | buffer fills up does not work. Other than this, |
| 1625 | though, everything else seems to work fine. |
| 1626 | |
| 1627 | Since the latter lossage is more benign, we may as well |
| 1628 | lose that way. -- cph */ |
| 1629 | #ifdef FIONBIO |
| 1630 | #if defined(UNIX98_PTYS) |
| 1631 | { |
| 1632 | int on = 1; |
| 1633 | ioctl (fd, FIONBIO, &on); |
| 1634 | } |
| 1635 | #endif |
| 1636 | #endif |
| 1637 | } |
| 1638 | #endif /* HAVE_PTYS */ |
| 1639 | \f |
| 1640 | #if !defined(CANNOT_DUMP) || !defined(SYSTEM_MALLOC) |
| 1641 | /* Some systems that cannot dump also cannot implement these. */ |
| 1642 | |
| 1643 | /* |
| 1644 | * Return the address of the start of the text segment prior to |
| 1645 | * doing an unexec. After unexec the return value is undefined. |
| 1646 | * See crt0.c for further explanation and _start. |
| 1647 | * |
| 1648 | */ |
| 1649 | |
| 1650 | #if !(defined (__NetBSD__) && defined (__ELF__)) |
| 1651 | #ifndef HAVE_TEXT_START |
| 1652 | char * |
| 1653 | start_of_text () |
| 1654 | { |
| 1655 | #ifdef TEXT_START |
| 1656 | return ((char *) TEXT_START); |
| 1657 | #else |
| 1658 | extern int _start (); |
| 1659 | return ((char *) _start); |
| 1660 | #endif /* TEXT_START */ |
| 1661 | } |
| 1662 | #endif /* not HAVE_TEXT_START */ |
| 1663 | #endif |
| 1664 | |
| 1665 | /* |
| 1666 | * Return the address of the start of the data segment prior to |
| 1667 | * doing an unexec. After unexec the return value is undefined. |
| 1668 | * See crt0.c for further information and definition of data_start. |
| 1669 | * |
| 1670 | * Apparently, on BSD systems this is etext at startup. On |
| 1671 | * USG systems (swapping) this is highly mmu dependent and |
| 1672 | * is also dependent on whether or not the program is running |
| 1673 | * with shared text. Generally there is a (possibly large) |
| 1674 | * gap between end of text and start of data with shared text. |
| 1675 | * |
| 1676 | * On Uniplus+ systems with shared text, data starts at a |
| 1677 | * fixed address. Each port (from a given oem) is generally |
| 1678 | * different, and the specific value of the start of data can |
| 1679 | * be obtained via the UniPlus+ specific "uvar" system call, |
| 1680 | * however the method outlined in crt0.c seems to be more portable. |
| 1681 | * |
| 1682 | * Probably what will have to happen when a USG unexec is available, |
| 1683 | * at least on UniPlus, is temacs will have to be made unshared so |
| 1684 | * that text and data are contiguous. Then once loadup is complete, |
| 1685 | * unexec will produce a shared executable where the data can be |
| 1686 | * at the normal shared text boundary and the startofdata variable |
| 1687 | * will be patched by unexec to the correct value. |
| 1688 | * |
| 1689 | */ |
| 1690 | |
| 1691 | #ifndef start_of_data |
| 1692 | char * |
| 1693 | start_of_data () |
| 1694 | { |
| 1695 | #ifdef DATA_START |
| 1696 | return ((char *) DATA_START); |
| 1697 | #else |
| 1698 | #ifdef ORDINARY_LINK |
| 1699 | /* |
| 1700 | * This is a hack. Since we're not linking crt0.c or pre_crt0.c, |
| 1701 | * data_start isn't defined. We take the address of environ, which |
| 1702 | * is known to live at or near the start of the system crt0.c, and |
| 1703 | * we don't sweat the handful of bytes that might lose. |
| 1704 | */ |
| 1705 | extern char **environ; |
| 1706 | |
| 1707 | return ((char *) &environ); |
| 1708 | #else |
| 1709 | extern int data_start; |
| 1710 | return ((char *) &data_start); |
| 1711 | #endif /* ORDINARY_LINK */ |
| 1712 | #endif /* DATA_START */ |
| 1713 | } |
| 1714 | #endif /* start_of_data */ |
| 1715 | #endif /* NEED_STARTS (not CANNOT_DUMP or not SYSTEM_MALLOC) */ |
| 1716 | \f |
| 1717 | /* init_system_name sets up the string for the Lisp function |
| 1718 | system-name to return. */ |
| 1719 | |
| 1720 | extern Lisp_Object Vsystem_name; |
| 1721 | |
| 1722 | #ifdef HAVE_SOCKETS |
| 1723 | #include <sys/socket.h> |
| 1724 | #include <netdb.h> |
| 1725 | #endif /* HAVE_SOCKETS */ |
| 1726 | |
| 1727 | #ifdef TRY_AGAIN |
| 1728 | #ifndef HAVE_H_ERRNO |
| 1729 | extern int h_errno; |
| 1730 | #endif |
| 1731 | #endif /* TRY_AGAIN */ |
| 1732 | |
| 1733 | void |
| 1734 | init_system_name () |
| 1735 | { |
| 1736 | #ifndef HAVE_GETHOSTNAME |
| 1737 | struct utsname uts; |
| 1738 | uname (&uts); |
| 1739 | Vsystem_name = build_string (uts.nodename); |
| 1740 | #else /* HAVE_GETHOSTNAME */ |
| 1741 | unsigned int hostname_size = 256; |
| 1742 | char *hostname = (char *) alloca (hostname_size); |
| 1743 | |
| 1744 | /* Try to get the host name; if the buffer is too short, try |
| 1745 | again. Apparently, the only indication gethostname gives of |
| 1746 | whether the buffer was large enough is the presence or absence |
| 1747 | of a '\0' in the string. Eech. */ |
| 1748 | for (;;) |
| 1749 | { |
| 1750 | gethostname (hostname, hostname_size - 1); |
| 1751 | hostname[hostname_size - 1] = '\0'; |
| 1752 | |
| 1753 | /* Was the buffer large enough for the '\0'? */ |
| 1754 | if (strlen (hostname) < hostname_size - 1) |
| 1755 | break; |
| 1756 | |
| 1757 | hostname_size <<= 1; |
| 1758 | hostname = (char *) alloca (hostname_size); |
| 1759 | } |
| 1760 | #ifdef HAVE_SOCKETS |
| 1761 | /* Turn the hostname into the official, fully-qualified hostname. |
| 1762 | Don't do this if we're going to dump; this can confuse system |
| 1763 | libraries on some machines and make the dumped emacs core dump. */ |
| 1764 | #ifndef CANNOT_DUMP |
| 1765 | if (initialized) |
| 1766 | #endif /* not CANNOT_DUMP */ |
| 1767 | if (! index (hostname, '.')) |
| 1768 | { |
| 1769 | int count; |
| 1770 | #ifdef HAVE_GETADDRINFO |
| 1771 | struct addrinfo *res; |
| 1772 | struct addrinfo hints; |
| 1773 | int ret; |
| 1774 | |
| 1775 | memset (&hints, 0, sizeof(hints)); |
| 1776 | hints.ai_socktype = SOCK_STREAM; |
| 1777 | hints.ai_flags = AI_CANONNAME; |
| 1778 | |
| 1779 | for (count = 0;; count++) |
| 1780 | { |
| 1781 | if ((ret = getaddrinfo (hostname, NULL, &hints, &res)) == 0 |
| 1782 | || ret != EAI_AGAIN) |
| 1783 | break; |
| 1784 | |
| 1785 | if (count >= 5) |
| 1786 | break; |
| 1787 | Fsleep_for (make_number (1), Qnil); |
| 1788 | } |
| 1789 | |
| 1790 | if (ret == 0) |
| 1791 | { |
| 1792 | struct addrinfo *it = res; |
| 1793 | while (it) |
| 1794 | { |
| 1795 | char *fqdn = it->ai_canonname; |
| 1796 | if (fqdn && index (fqdn, '.') |
| 1797 | && strcmp (fqdn, "localhost.localdomain") != 0) |
| 1798 | break; |
| 1799 | it = it->ai_next; |
| 1800 | } |
| 1801 | if (it) |
| 1802 | { |
| 1803 | hostname = alloca (strlen (it->ai_canonname) + 1); |
| 1804 | strcpy (hostname, it->ai_canonname); |
| 1805 | } |
| 1806 | freeaddrinfo (res); |
| 1807 | } |
| 1808 | #else /* !HAVE_GETADDRINFO */ |
| 1809 | struct hostent *hp; |
| 1810 | for (count = 0;; count++) |
| 1811 | { |
| 1812 | |
| 1813 | #ifdef TRY_AGAIN |
| 1814 | h_errno = 0; |
| 1815 | #endif |
| 1816 | hp = gethostbyname (hostname); |
| 1817 | #ifdef TRY_AGAIN |
| 1818 | if (! (hp == 0 && h_errno == TRY_AGAIN)) |
| 1819 | #endif |
| 1820 | |
| 1821 | break; |
| 1822 | |
| 1823 | if (count >= 5) |
| 1824 | break; |
| 1825 | Fsleep_for (make_number (1), Qnil); |
| 1826 | } |
| 1827 | |
| 1828 | if (hp) |
| 1829 | { |
| 1830 | char *fqdn = (char *) hp->h_name; |
| 1831 | |
| 1832 | if (!index (fqdn, '.')) |
| 1833 | { |
| 1834 | /* We still don't have a fully qualified domain name. |
| 1835 | Try to find one in the list of alternate names */ |
| 1836 | char **alias = hp->h_aliases; |
| 1837 | while (*alias |
| 1838 | && (!index (*alias, '.') |
| 1839 | || !strcmp (*alias, "localhost.localdomain"))) |
| 1840 | alias++; |
| 1841 | if (*alias) |
| 1842 | fqdn = *alias; |
| 1843 | } |
| 1844 | hostname = fqdn; |
| 1845 | } |
| 1846 | #endif /* !HAVE_GETADDRINFO */ |
| 1847 | } |
| 1848 | #endif /* HAVE_SOCKETS */ |
| 1849 | Vsystem_name = build_string (hostname); |
| 1850 | #endif /* HAVE_GETHOSTNAME */ |
| 1851 | { |
| 1852 | unsigned char *p; |
| 1853 | for (p = SDATA (Vsystem_name); *p; p++) |
| 1854 | if (*p == ' ' || *p == '\t') |
| 1855 | *p = '-'; |
| 1856 | } |
| 1857 | } |
| 1858 | \f |
| 1859 | #ifndef MSDOS |
| 1860 | #if !defined (HAVE_SELECT) |
| 1861 | |
| 1862 | #include "sysselect.h" |
| 1863 | #undef select |
| 1864 | |
| 1865 | #if defined (HAVE_X_WINDOWS) && !defined (HAVE_SELECT) |
| 1866 | /* Cause explanatory error message at compile time, |
| 1867 | since the select emulation is not good enough for X. */ |
| 1868 | int *x = &x_windows_lose_if_no_select_system_call; |
| 1869 | #endif |
| 1870 | |
| 1871 | /* Emulate as much as select as is possible under 4.1 and needed by Gnu Emacs |
| 1872 | * Only checks read descriptors. |
| 1873 | */ |
| 1874 | /* How long to wait between checking fds in select */ |
| 1875 | #define SELECT_PAUSE 1 |
| 1876 | int select_alarmed; |
| 1877 | |
| 1878 | /* For longjmp'ing back to read_input_waiting. */ |
| 1879 | |
| 1880 | jmp_buf read_alarm_throw; |
| 1881 | |
| 1882 | /* Nonzero if the alarm signal should throw back to read_input_waiting. |
| 1883 | The read_socket_hook function sets this to 1 while it is waiting. */ |
| 1884 | |
| 1885 | int read_alarm_should_throw; |
| 1886 | |
| 1887 | SIGTYPE |
| 1888 | select_alarm () |
| 1889 | { |
| 1890 | select_alarmed = 1; |
| 1891 | signal (SIGALRM, SIG_IGN); |
| 1892 | SIGNAL_THREAD_CHECK (SIGALRM); |
| 1893 | if (read_alarm_should_throw) |
| 1894 | longjmp (read_alarm_throw, 1); |
| 1895 | } |
| 1896 | |
| 1897 | #ifndef WINDOWSNT |
| 1898 | /* Only rfds are checked. */ |
| 1899 | int |
| 1900 | sys_select (nfds, rfds, wfds, efds, timeout) |
| 1901 | int nfds; |
| 1902 | SELECT_TYPE *rfds, *wfds, *efds; |
| 1903 | EMACS_TIME *timeout; |
| 1904 | { |
| 1905 | /* XXX This needs to be updated for multi-tty support. Is there |
| 1906 | anybody who needs to emulate select these days? */ |
| 1907 | int ravail = 0; |
| 1908 | SELECT_TYPE orfds; |
| 1909 | int timeoutval; |
| 1910 | int *local_timeout; |
| 1911 | extern int proc_buffered_char[]; |
| 1912 | #ifndef subprocesses |
| 1913 | int process_tick = 0, update_tick = 0; |
| 1914 | #else |
| 1915 | extern int process_tick, update_tick; |
| 1916 | #endif |
| 1917 | unsigned char buf; |
| 1918 | |
| 1919 | #if defined (HAVE_SELECT) && defined (HAVE_X_WINDOWS) |
| 1920 | /* If we're using X, then the native select will work; we only need the |
| 1921 | emulation for non-X usage. */ |
| 1922 | if (!NILP (Vinitial_window_system)) |
| 1923 | return select (nfds, rfds, wfds, efds, timeout); |
| 1924 | #endif |
| 1925 | timeoutval = timeout ? EMACS_SECS (*timeout) : 100000; |
| 1926 | local_timeout = &timeoutval; |
| 1927 | FD_ZERO (&orfds); |
| 1928 | if (rfds) |
| 1929 | { |
| 1930 | orfds = *rfds; |
| 1931 | FD_ZERO (rfds); |
| 1932 | } |
| 1933 | if (wfds) |
| 1934 | FD_ZERO (wfds); |
| 1935 | if (efds) |
| 1936 | FD_ZERO (efds); |
| 1937 | |
| 1938 | /* If we are looking only for the terminal, with no timeout, |
| 1939 | just read it and wait -- that's more efficient. */ |
| 1940 | if (*local_timeout == 100000 && process_tick == update_tick |
| 1941 | && FD_ISSET (0, &orfds)) |
| 1942 | { |
| 1943 | int fd; |
| 1944 | for (fd = 1; fd < nfds; ++fd) |
| 1945 | if (FD_ISSET (fd, &orfds)) |
| 1946 | goto hardway; |
| 1947 | if (! detect_input_pending ()) |
| 1948 | read_input_waiting (); |
| 1949 | FD_SET (0, rfds); |
| 1950 | return 1; |
| 1951 | } |
| 1952 | |
| 1953 | hardway: |
| 1954 | /* Once a second, till the timer expires, check all the flagged read |
| 1955 | * descriptors to see if any input is available. If there is some then |
| 1956 | * set the corresponding bit in the return copy of rfds. |
| 1957 | */ |
| 1958 | while (1) |
| 1959 | { |
| 1960 | register int to_check, fd; |
| 1961 | |
| 1962 | if (rfds) |
| 1963 | { |
| 1964 | for (to_check = nfds, fd = 0; --to_check >= 0; fd++) |
| 1965 | { |
| 1966 | if (FD_ISSET (fd, &orfds)) |
| 1967 | { |
| 1968 | int avail = 0, status = 0; |
| 1969 | |
| 1970 | if (fd == 0) |
| 1971 | avail = detect_input_pending (); /* Special keyboard handler */ |
| 1972 | else |
| 1973 | { |
| 1974 | #ifdef FIONREAD |
| 1975 | status = ioctl (fd, FIONREAD, &avail); |
| 1976 | #else /* no FIONREAD */ |
| 1977 | /* Hoping it will return -1 if nothing available |
| 1978 | or 0 if all 0 chars requested are read. */ |
| 1979 | if (proc_buffered_char[fd] >= 0) |
| 1980 | avail = 1; |
| 1981 | else |
| 1982 | { |
| 1983 | avail = read (fd, &buf, 1); |
| 1984 | if (avail > 0) |
| 1985 | proc_buffered_char[fd] = buf; |
| 1986 | } |
| 1987 | #endif /* no FIONREAD */ |
| 1988 | } |
| 1989 | if (status >= 0 && avail > 0) |
| 1990 | { |
| 1991 | FD_SET (fd, rfds); |
| 1992 | ravail++; |
| 1993 | } |
| 1994 | } |
| 1995 | } |
| 1996 | } |
| 1997 | if (*local_timeout == 0 || ravail != 0 || process_tick != update_tick) |
| 1998 | break; |
| 1999 | |
| 2000 | turn_on_atimers (0); |
| 2001 | signal (SIGALRM, select_alarm); |
| 2002 | select_alarmed = 0; |
| 2003 | alarm (SELECT_PAUSE); |
| 2004 | |
| 2005 | /* Wait for a SIGALRM (or maybe a SIGTINT) */ |
| 2006 | while (select_alarmed == 0 && *local_timeout != 0 |
| 2007 | && process_tick == update_tick) |
| 2008 | { |
| 2009 | /* If we are interested in terminal input, |
| 2010 | wait by reading the terminal. |
| 2011 | That makes instant wakeup for terminal input at least. */ |
| 2012 | if (FD_ISSET (0, &orfds)) |
| 2013 | { |
| 2014 | read_input_waiting (); |
| 2015 | if (detect_input_pending ()) |
| 2016 | select_alarmed = 1; |
| 2017 | } |
| 2018 | else |
| 2019 | pause (); |
| 2020 | } |
| 2021 | (*local_timeout) -= SELECT_PAUSE; |
| 2022 | |
| 2023 | /* Reset the old alarm if there was one. */ |
| 2024 | turn_on_atimers (1); |
| 2025 | |
| 2026 | if (*local_timeout == 0) /* Stop on timer being cleared */ |
| 2027 | break; |
| 2028 | } |
| 2029 | return ravail; |
| 2030 | } |
| 2031 | #endif /* not WINDOWSNT */ |
| 2032 | |
| 2033 | /* Read keyboard input into the standard buffer, |
| 2034 | waiting for at least one character. */ |
| 2035 | |
| 2036 | void |
| 2037 | read_input_waiting () |
| 2038 | { |
| 2039 | /* XXX This needs to be updated for multi-tty support. Is there |
| 2040 | anybody who needs to emulate select these days? */ |
| 2041 | int nread, i; |
| 2042 | extern int quit_char; |
| 2043 | |
| 2044 | if (read_socket_hook) |
| 2045 | { |
| 2046 | struct input_event hold_quit; |
| 2047 | |
| 2048 | EVENT_INIT (hold_quit); |
| 2049 | hold_quit.kind = NO_EVENT; |
| 2050 | |
| 2051 | read_alarm_should_throw = 0; |
| 2052 | if (! setjmp (read_alarm_throw)) |
| 2053 | nread = (*read_socket_hook) (0, 1, &hold_quit); |
| 2054 | else |
| 2055 | nread = -1; |
| 2056 | |
| 2057 | if (hold_quit.kind != NO_EVENT) |
| 2058 | kbd_buffer_store_event (&hold_quit); |
| 2059 | } |
| 2060 | else |
| 2061 | { |
| 2062 | struct input_event e; |
| 2063 | char buf[3]; |
| 2064 | nread = read (fileno (stdin), buf, 1); |
| 2065 | EVENT_INIT (e); |
| 2066 | |
| 2067 | /* Scan the chars for C-g and store them in kbd_buffer. */ |
| 2068 | e.kind = ASCII_KEYSTROKE_EVENT; |
| 2069 | e.frame_or_window = selected_frame; |
| 2070 | e.modifiers = 0; |
| 2071 | for (i = 0; i < nread; i++) |
| 2072 | { |
| 2073 | /* Convert chars > 0177 to meta events if desired. |
| 2074 | We do this under the same conditions that read_avail_input does. */ |
| 2075 | if (read_socket_hook == 0) |
| 2076 | { |
| 2077 | /* If the user says she has a meta key, then believe her. */ |
| 2078 | if (meta_key == 1 && (buf[i] & 0x80)) |
| 2079 | e.modifiers = meta_modifier; |
| 2080 | if (meta_key != 2) |
| 2081 | buf[i] &= ~0x80; |
| 2082 | } |
| 2083 | |
| 2084 | XSETINT (e.code, buf[i]); |
| 2085 | kbd_buffer_store_event (&e); |
| 2086 | /* Don't look at input that follows a C-g too closely. |
| 2087 | This reduces lossage due to autorepeat on C-g. */ |
| 2088 | if (buf[i] == quit_char) |
| 2089 | break; |
| 2090 | } |
| 2091 | } |
| 2092 | } |
| 2093 | |
| 2094 | #if !defined (HAVE_SELECT) |
| 2095 | #define select sys_select |
| 2096 | #endif |
| 2097 | |
| 2098 | #endif /* not HAVE_SELECT */ |
| 2099 | #endif /* not MSDOS */ |
| 2100 | \f |
| 2101 | /* POSIX signals support - DJB */ |
| 2102 | /* Anyone with POSIX signals should have ANSI C declarations */ |
| 2103 | |
| 2104 | #ifdef POSIX_SIGNALS |
| 2105 | |
| 2106 | sigset_t empty_mask, full_mask; |
| 2107 | |
| 2108 | signal_handler_t |
| 2109 | sys_signal (int signal_number, signal_handler_t action) |
| 2110 | { |
| 2111 | struct sigaction new_action, old_action; |
| 2112 | sigemptyset (&new_action.sa_mask); |
| 2113 | new_action.sa_handler = action; |
| 2114 | new_action.sa_flags = 0; |
| 2115 | #if defined (SA_RESTART) |
| 2116 | /* Emacs mostly works better with restartable system services. If this |
| 2117 | flag exists, we probably want to turn it on here. |
| 2118 | However, on some systems this resets the timeout of `select' |
| 2119 | which means that `select' never finishes if it keeps getting signals. |
| 2120 | BROKEN_SA_RESTART is defined on those systems. */ |
| 2121 | /* It's not clear why the comment above says "mostly works better". --Stef |
| 2122 | When SYNC_INPUT is set, we don't want SA_RESTART because we need to poll |
| 2123 | for pending input so we need long-running syscalls to be interrupted |
| 2124 | after a signal that sets the interrupt_input_pending flag. */ |
| 2125 | /* Non-interactive keyboard input goes through stdio, where we always |
| 2126 | want restartable system calls. */ |
| 2127 | # if defined (BROKEN_SA_RESTART) || defined(SYNC_INPUT) |
| 2128 | if (noninteractive) |
| 2129 | # endif |
| 2130 | new_action.sa_flags = SA_RESTART; |
| 2131 | #endif |
| 2132 | sigaction (signal_number, &new_action, &old_action); |
| 2133 | return (old_action.sa_handler); |
| 2134 | } |
| 2135 | |
| 2136 | #ifndef __GNUC__ |
| 2137 | /* If we're compiling with GCC, we don't need this function, since it |
| 2138 | can be written as a macro. */ |
| 2139 | sigset_t |
| 2140 | sys_sigmask (int sig) |
| 2141 | { |
| 2142 | sigset_t mask; |
| 2143 | sigemptyset (&mask); |
| 2144 | sigaddset (&mask, sig); |
| 2145 | return mask; |
| 2146 | } |
| 2147 | #endif |
| 2148 | |
| 2149 | /* I'd like to have these guys return pointers to the mask storage in here, |
| 2150 | but there'd be trouble if the code was saving multiple masks. I'll be |
| 2151 | safe and pass the structure. It normally won't be more than 2 bytes |
| 2152 | anyhow. - DJB */ |
| 2153 | |
| 2154 | sigset_t |
| 2155 | sys_sigblock (sigset_t new_mask) |
| 2156 | { |
| 2157 | sigset_t old_mask; |
| 2158 | sigprocmask (SIG_BLOCK, &new_mask, &old_mask); |
| 2159 | return (old_mask); |
| 2160 | } |
| 2161 | |
| 2162 | sigset_t |
| 2163 | sys_sigunblock (sigset_t new_mask) |
| 2164 | { |
| 2165 | sigset_t old_mask; |
| 2166 | sigprocmask (SIG_UNBLOCK, &new_mask, &old_mask); |
| 2167 | return (old_mask); |
| 2168 | } |
| 2169 | |
| 2170 | sigset_t |
| 2171 | sys_sigsetmask (sigset_t new_mask) |
| 2172 | { |
| 2173 | sigset_t old_mask; |
| 2174 | sigprocmask (SIG_SETMASK, &new_mask, &old_mask); |
| 2175 | return (old_mask); |
| 2176 | } |
| 2177 | |
| 2178 | #endif /* POSIX_SIGNALS */ |
| 2179 | \f |
| 2180 | #if !defined HAVE_STRSIGNAL && !HAVE_DECL_SYS_SIGLIST |
| 2181 | static char *my_sys_siglist[NSIG]; |
| 2182 | # ifdef sys_siglist |
| 2183 | # undef sys_siglist |
| 2184 | # endif |
| 2185 | # define sys_siglist my_sys_siglist |
| 2186 | #endif |
| 2187 | |
| 2188 | void |
| 2189 | init_signals () |
| 2190 | { |
| 2191 | #ifdef POSIX_SIGNALS |
| 2192 | sigemptyset (&empty_mask); |
| 2193 | sigfillset (&full_mask); |
| 2194 | #endif |
| 2195 | |
| 2196 | #if !defined HAVE_STRSIGNAL && !HAVE_DECL_SYS_SIGLIST |
| 2197 | if (! initialized) |
| 2198 | { |
| 2199 | # ifdef SIGABRT |
| 2200 | sys_siglist[SIGABRT] = "Aborted"; |
| 2201 | # endif |
| 2202 | # ifdef SIGAIO |
| 2203 | sys_siglist[SIGAIO] = "LAN I/O interrupt"; |
| 2204 | # endif |
| 2205 | # ifdef SIGALRM |
| 2206 | sys_siglist[SIGALRM] = "Alarm clock"; |
| 2207 | # endif |
| 2208 | # ifdef SIGBUS |
| 2209 | sys_siglist[SIGBUS] = "Bus error"; |
| 2210 | # endif |
| 2211 | # ifdef SIGCLD |
| 2212 | sys_siglist[SIGCLD] = "Child status changed"; |
| 2213 | # endif |
| 2214 | # ifdef SIGCHLD |
| 2215 | sys_siglist[SIGCHLD] = "Child status changed"; |
| 2216 | # endif |
| 2217 | # ifdef SIGCONT |
| 2218 | sys_siglist[SIGCONT] = "Continued"; |
| 2219 | # endif |
| 2220 | # ifdef SIGDANGER |
| 2221 | sys_siglist[SIGDANGER] = "Swap space dangerously low"; |
| 2222 | # endif |
| 2223 | # ifdef SIGDGNOTIFY |
| 2224 | sys_siglist[SIGDGNOTIFY] = "Notification message in queue"; |
| 2225 | # endif |
| 2226 | # ifdef SIGEMT |
| 2227 | sys_siglist[SIGEMT] = "Emulation trap"; |
| 2228 | # endif |
| 2229 | # ifdef SIGFPE |
| 2230 | sys_siglist[SIGFPE] = "Arithmetic exception"; |
| 2231 | # endif |
| 2232 | # ifdef SIGFREEZE |
| 2233 | sys_siglist[SIGFREEZE] = "SIGFREEZE"; |
| 2234 | # endif |
| 2235 | # ifdef SIGGRANT |
| 2236 | sys_siglist[SIGGRANT] = "Monitor mode granted"; |
| 2237 | # endif |
| 2238 | # ifdef SIGHUP |
| 2239 | sys_siglist[SIGHUP] = "Hangup"; |
| 2240 | # endif |
| 2241 | # ifdef SIGILL |
| 2242 | sys_siglist[SIGILL] = "Illegal instruction"; |
| 2243 | # endif |
| 2244 | # ifdef SIGINT |
| 2245 | sys_siglist[SIGINT] = "Interrupt"; |
| 2246 | # endif |
| 2247 | # ifdef SIGIO |
| 2248 | sys_siglist[SIGIO] = "I/O possible"; |
| 2249 | # endif |
| 2250 | # ifdef SIGIOINT |
| 2251 | sys_siglist[SIGIOINT] = "I/O intervention required"; |
| 2252 | # endif |
| 2253 | # ifdef SIGIOT |
| 2254 | sys_siglist[SIGIOT] = "IOT trap"; |
| 2255 | # endif |
| 2256 | # ifdef SIGKILL |
| 2257 | sys_siglist[SIGKILL] = "Killed"; |
| 2258 | # endif |
| 2259 | # ifdef SIGLOST |
| 2260 | sys_siglist[SIGLOST] = "Resource lost"; |
| 2261 | # endif |
| 2262 | # ifdef SIGLWP |
| 2263 | sys_siglist[SIGLWP] = "SIGLWP"; |
| 2264 | # endif |
| 2265 | # ifdef SIGMSG |
| 2266 | sys_siglist[SIGMSG] = "Monitor mode data available"; |
| 2267 | # endif |
| 2268 | # ifdef SIGPHONE |
| 2269 | sys_siglist[SIGWIND] = "SIGPHONE"; |
| 2270 | # endif |
| 2271 | # ifdef SIGPIPE |
| 2272 | sys_siglist[SIGPIPE] = "Broken pipe"; |
| 2273 | # endif |
| 2274 | # ifdef SIGPOLL |
| 2275 | sys_siglist[SIGPOLL] = "Pollable event occurred"; |
| 2276 | # endif |
| 2277 | # ifdef SIGPROF |
| 2278 | sys_siglist[SIGPROF] = "Profiling timer expired"; |
| 2279 | # endif |
| 2280 | # ifdef SIGPTY |
| 2281 | sys_siglist[SIGPTY] = "PTY I/O interrupt"; |
| 2282 | # endif |
| 2283 | # ifdef SIGPWR |
| 2284 | sys_siglist[SIGPWR] = "Power-fail restart"; |
| 2285 | # endif |
| 2286 | # ifdef SIGQUIT |
| 2287 | sys_siglist[SIGQUIT] = "Quit"; |
| 2288 | # endif |
| 2289 | # ifdef SIGRETRACT |
| 2290 | sys_siglist[SIGRETRACT] = "Need to relinguish monitor mode"; |
| 2291 | # endif |
| 2292 | # ifdef SIGSAK |
| 2293 | sys_siglist[SIGSAK] = "Secure attention"; |
| 2294 | # endif |
| 2295 | # ifdef SIGSEGV |
| 2296 | sys_siglist[SIGSEGV] = "Segmentation violation"; |
| 2297 | # endif |
| 2298 | # ifdef SIGSOUND |
| 2299 | sys_siglist[SIGSOUND] = "Sound completed"; |
| 2300 | # endif |
| 2301 | # ifdef SIGSTOP |
| 2302 | sys_siglist[SIGSTOP] = "Stopped (signal)"; |
| 2303 | # endif |
| 2304 | # ifdef SIGSTP |
| 2305 | sys_siglist[SIGSTP] = "Stopped (user)"; |
| 2306 | # endif |
| 2307 | # ifdef SIGSYS |
| 2308 | sys_siglist[SIGSYS] = "Bad argument to system call"; |
| 2309 | # endif |
| 2310 | # ifdef SIGTERM |
| 2311 | sys_siglist[SIGTERM] = "Terminated"; |
| 2312 | # endif |
| 2313 | # ifdef SIGTHAW |
| 2314 | sys_siglist[SIGTHAW] = "SIGTHAW"; |
| 2315 | # endif |
| 2316 | # ifdef SIGTRAP |
| 2317 | sys_siglist[SIGTRAP] = "Trace/breakpoint trap"; |
| 2318 | # endif |
| 2319 | # ifdef SIGTSTP |
| 2320 | sys_siglist[SIGTSTP] = "Stopped (user)"; |
| 2321 | # endif |
| 2322 | # ifdef SIGTTIN |
| 2323 | sys_siglist[SIGTTIN] = "Stopped (tty input)"; |
| 2324 | # endif |
| 2325 | # ifdef SIGTTOU |
| 2326 | sys_siglist[SIGTTOU] = "Stopped (tty output)"; |
| 2327 | # endif |
| 2328 | # ifdef SIGURG |
| 2329 | sys_siglist[SIGURG] = "Urgent I/O condition"; |
| 2330 | # endif |
| 2331 | # ifdef SIGUSR1 |
| 2332 | sys_siglist[SIGUSR1] = "User defined signal 1"; |
| 2333 | # endif |
| 2334 | # ifdef SIGUSR2 |
| 2335 | sys_siglist[SIGUSR2] = "User defined signal 2"; |
| 2336 | # endif |
| 2337 | # ifdef SIGVTALRM |
| 2338 | sys_siglist[SIGVTALRM] = "Virtual timer expired"; |
| 2339 | # endif |
| 2340 | # ifdef SIGWAITING |
| 2341 | sys_siglist[SIGWAITING] = "Process's LWPs are blocked"; |
| 2342 | # endif |
| 2343 | # ifdef SIGWINCH |
| 2344 | sys_siglist[SIGWINCH] = "Window size changed"; |
| 2345 | # endif |
| 2346 | # ifdef SIGWIND |
| 2347 | sys_siglist[SIGWIND] = "SIGWIND"; |
| 2348 | # endif |
| 2349 | # ifdef SIGXCPU |
| 2350 | sys_siglist[SIGXCPU] = "CPU time limit exceeded"; |
| 2351 | # endif |
| 2352 | # ifdef SIGXFSZ |
| 2353 | sys_siglist[SIGXFSZ] = "File size limit exceeded"; |
| 2354 | # endif |
| 2355 | } |
| 2356 | #endif /* !defined HAVE_STRSIGNAL && !defined HAVE_DECL_SYS_SIGLIST */ |
| 2357 | } |
| 2358 | \f |
| 2359 | #ifndef HAVE_RANDOM |
| 2360 | #ifdef random |
| 2361 | #define HAVE_RANDOM |
| 2362 | #endif |
| 2363 | #endif |
| 2364 | |
| 2365 | /* Figure out how many bits the system's random number generator uses. |
| 2366 | `random' and `lrand48' are assumed to return 31 usable bits. |
| 2367 | BSD `rand' returns a 31 bit value but the low order bits are unusable; |
| 2368 | so we'll shift it and treat it like the 15-bit USG `rand'. */ |
| 2369 | |
| 2370 | #ifndef RAND_BITS |
| 2371 | # ifdef HAVE_RANDOM |
| 2372 | # define RAND_BITS 31 |
| 2373 | # else /* !HAVE_RANDOM */ |
| 2374 | # ifdef HAVE_LRAND48 |
| 2375 | # define RAND_BITS 31 |
| 2376 | # define random lrand48 |
| 2377 | # else /* !HAVE_LRAND48 */ |
| 2378 | # define RAND_BITS 15 |
| 2379 | # if RAND_MAX == 32767 |
| 2380 | # define random rand |
| 2381 | # else /* RAND_MAX != 32767 */ |
| 2382 | # if RAND_MAX == 2147483647 |
| 2383 | # define random() (rand () >> 16) |
| 2384 | # else /* RAND_MAX != 2147483647 */ |
| 2385 | # ifdef USG |
| 2386 | # define random rand |
| 2387 | # else |
| 2388 | # define random() (rand () >> 16) |
| 2389 | # endif /* !USG */ |
| 2390 | # endif /* RAND_MAX != 2147483647 */ |
| 2391 | # endif /* RAND_MAX != 32767 */ |
| 2392 | # endif /* !HAVE_LRAND48 */ |
| 2393 | # endif /* !HAVE_RANDOM */ |
| 2394 | #endif /* !RAND_BITS */ |
| 2395 | |
| 2396 | void |
| 2397 | seed_random (arg) |
| 2398 | long arg; |
| 2399 | { |
| 2400 | #ifdef HAVE_RANDOM |
| 2401 | srandom ((unsigned int)arg); |
| 2402 | #else |
| 2403 | # ifdef HAVE_LRAND48 |
| 2404 | srand48 (arg); |
| 2405 | # else |
| 2406 | srand ((unsigned int)arg); |
| 2407 | # endif |
| 2408 | #endif |
| 2409 | } |
| 2410 | |
| 2411 | /* |
| 2412 | * Build a full Emacs-sized word out of whatever we've got. |
| 2413 | * This suffices even for a 64-bit architecture with a 15-bit rand. |
| 2414 | */ |
| 2415 | long |
| 2416 | get_random () |
| 2417 | { |
| 2418 | long val = random (); |
| 2419 | #if VALBITS > RAND_BITS |
| 2420 | val = (val << RAND_BITS) ^ random (); |
| 2421 | #if VALBITS > 2*RAND_BITS |
| 2422 | val = (val << RAND_BITS) ^ random (); |
| 2423 | #if VALBITS > 3*RAND_BITS |
| 2424 | val = (val << RAND_BITS) ^ random (); |
| 2425 | #if VALBITS > 4*RAND_BITS |
| 2426 | val = (val << RAND_BITS) ^ random (); |
| 2427 | #endif /* need at least 5 */ |
| 2428 | #endif /* need at least 4 */ |
| 2429 | #endif /* need at least 3 */ |
| 2430 | #endif /* need at least 2 */ |
| 2431 | return val & ((1L << VALBITS) - 1); |
| 2432 | } |
| 2433 | |
| 2434 | #ifndef HAVE_STRERROR |
| 2435 | #ifndef WINDOWSNT |
| 2436 | char * |
| 2437 | strerror (errnum) |
| 2438 | int errnum; |
| 2439 | { |
| 2440 | extern char *sys_errlist[]; |
| 2441 | extern int sys_nerr; |
| 2442 | |
| 2443 | if (errnum >= 0 && errnum < sys_nerr) |
| 2444 | return sys_errlist[errnum]; |
| 2445 | return (char *) "Unknown error"; |
| 2446 | } |
| 2447 | #endif /* not WINDOWSNT */ |
| 2448 | #endif /* ! HAVE_STRERROR */ |
| 2449 | \f |
| 2450 | int |
| 2451 | emacs_open (path, oflag, mode) |
| 2452 | const char *path; |
| 2453 | int oflag, mode; |
| 2454 | { |
| 2455 | register int rtnval; |
| 2456 | |
| 2457 | while ((rtnval = open (path, oflag, mode)) == -1 |
| 2458 | && (errno == EINTR)) |
| 2459 | QUIT; |
| 2460 | return (rtnval); |
| 2461 | } |
| 2462 | |
| 2463 | int |
| 2464 | emacs_close (fd) |
| 2465 | int fd; |
| 2466 | { |
| 2467 | int did_retry = 0; |
| 2468 | register int rtnval; |
| 2469 | |
| 2470 | while ((rtnval = close (fd)) == -1 |
| 2471 | && (errno == EINTR)) |
| 2472 | did_retry = 1; |
| 2473 | |
| 2474 | /* If close is interrupted SunOS 4.1 may or may not have closed the |
| 2475 | file descriptor. If it did the second close will fail with |
| 2476 | errno = EBADF. That means we have succeeded. */ |
| 2477 | if (rtnval == -1 && did_retry && errno == EBADF) |
| 2478 | return 0; |
| 2479 | |
| 2480 | return rtnval; |
| 2481 | } |
| 2482 | |
| 2483 | int |
| 2484 | emacs_read (fildes, buf, nbyte) |
| 2485 | int fildes; |
| 2486 | char *buf; |
| 2487 | unsigned int nbyte; |
| 2488 | { |
| 2489 | register int rtnval; |
| 2490 | |
| 2491 | while ((rtnval = read (fildes, buf, nbyte)) == -1 |
| 2492 | && (errno == EINTR)) |
| 2493 | QUIT; |
| 2494 | return (rtnval); |
| 2495 | } |
| 2496 | |
| 2497 | int |
| 2498 | emacs_write (fildes, buf, nbyte) |
| 2499 | int fildes; |
| 2500 | const char *buf; |
| 2501 | unsigned int nbyte; |
| 2502 | { |
| 2503 | register int rtnval, bytes_written; |
| 2504 | |
| 2505 | bytes_written = 0; |
| 2506 | |
| 2507 | while (nbyte > 0) |
| 2508 | { |
| 2509 | rtnval = write (fildes, buf, nbyte); |
| 2510 | |
| 2511 | if (rtnval == -1) |
| 2512 | { |
| 2513 | if (errno == EINTR) |
| 2514 | { |
| 2515 | #ifdef SYNC_INPUT |
| 2516 | /* I originally used `QUIT' but that might causes files to |
| 2517 | be truncated if you hit C-g in the middle of it. --Stef */ |
| 2518 | process_pending_signals (); |
| 2519 | #endif |
| 2520 | continue; |
| 2521 | } |
| 2522 | else |
| 2523 | return (bytes_written ? bytes_written : -1); |
| 2524 | } |
| 2525 | |
| 2526 | buf += rtnval; |
| 2527 | nbyte -= rtnval; |
| 2528 | bytes_written += rtnval; |
| 2529 | } |
| 2530 | return (bytes_written); |
| 2531 | } |
| 2532 | \f |
| 2533 | #ifdef USG |
| 2534 | /* |
| 2535 | * All of the following are for USG. |
| 2536 | * |
| 2537 | * On USG systems the system calls are INTERRUPTIBLE by signals |
| 2538 | * that the user program has elected to catch. Thus the system call |
| 2539 | * must be retried in these cases. To handle this without massive |
| 2540 | * changes in the source code, we remap the standard system call names |
| 2541 | * to names for our own functions in sysdep.c that do the system call |
| 2542 | * with retries. Actually, for portability reasons, it is good |
| 2543 | * programming practice, as this example shows, to limit all actual |
| 2544 | * system calls to a single occurrence in the source. Sure, this |
| 2545 | * adds an extra level of function call overhead but it is almost |
| 2546 | * always negligible. Fred Fish, Unisoft Systems Inc. |
| 2547 | */ |
| 2548 | |
| 2549 | /* |
| 2550 | * Warning, this function may not duplicate 4.2 action properly |
| 2551 | * under error conditions. |
| 2552 | */ |
| 2553 | |
| 2554 | #ifndef MAXPATHLEN |
| 2555 | /* In 4.1, param.h fails to define this. */ |
| 2556 | #define MAXPATHLEN 1024 |
| 2557 | #endif |
| 2558 | |
| 2559 | #ifndef HAVE_GETWD |
| 2560 | |
| 2561 | char * |
| 2562 | getwd (pathname) |
| 2563 | char *pathname; |
| 2564 | { |
| 2565 | char *npath, *spath; |
| 2566 | extern char *getcwd (); |
| 2567 | |
| 2568 | BLOCK_INPUT; /* getcwd uses malloc */ |
| 2569 | spath = npath = getcwd ((char *) 0, MAXPATHLEN); |
| 2570 | if (spath == 0) |
| 2571 | { |
| 2572 | UNBLOCK_INPUT; |
| 2573 | return spath; |
| 2574 | } |
| 2575 | /* On Altos 3068, getcwd can return @hostname/dir, so discard |
| 2576 | up to first slash. Should be harmless on other systems. */ |
| 2577 | while (*npath && *npath != '/') |
| 2578 | npath++; |
| 2579 | strcpy (pathname, npath); |
| 2580 | free (spath); /* getcwd uses malloc */ |
| 2581 | UNBLOCK_INPUT; |
| 2582 | return pathname; |
| 2583 | } |
| 2584 | |
| 2585 | #endif /* HAVE_GETWD */ |
| 2586 | |
| 2587 | /* |
| 2588 | * Emulate rename using unlink/link. Note that this is |
| 2589 | * only partially correct. Also, doesn't enforce restriction |
| 2590 | * that files be of same type (regular->regular, dir->dir, etc). |
| 2591 | */ |
| 2592 | |
| 2593 | #ifndef HAVE_RENAME |
| 2594 | |
| 2595 | rename (from, to) |
| 2596 | const char *from; |
| 2597 | const char *to; |
| 2598 | { |
| 2599 | if (access (from, 0) == 0) |
| 2600 | { |
| 2601 | unlink (to); |
| 2602 | if (link (from, to) == 0) |
| 2603 | if (unlink (from) == 0) |
| 2604 | return (0); |
| 2605 | } |
| 2606 | return (-1); |
| 2607 | } |
| 2608 | |
| 2609 | #endif |
| 2610 | |
| 2611 | |
| 2612 | #if defined(HPUX) && !defined(HAVE_PERROR) |
| 2613 | |
| 2614 | /* HPUX curses library references perror, but as far as we know |
| 2615 | it won't be called. Anyway this definition will do for now. */ |
| 2616 | |
| 2617 | perror () |
| 2618 | { |
| 2619 | } |
| 2620 | #endif /* HPUX and not HAVE_PERROR */ |
| 2621 | |
| 2622 | #ifndef HAVE_DUP2 |
| 2623 | |
| 2624 | /* |
| 2625 | * Emulate BSD dup2. First close newd if it already exists. |
| 2626 | * Then, attempt to dup oldd. If not successful, call dup2 recursively |
| 2627 | * until we are, then close the unsuccessful ones. |
| 2628 | */ |
| 2629 | |
| 2630 | dup2 (oldd, newd) |
| 2631 | int oldd; |
| 2632 | int newd; |
| 2633 | { |
| 2634 | register int fd, ret; |
| 2635 | |
| 2636 | emacs_close (newd); |
| 2637 | |
| 2638 | #ifdef F_DUPFD |
| 2639 | return fcntl (oldd, F_DUPFD, newd); |
| 2640 | #else |
| 2641 | fd = dup (old); |
| 2642 | if (fd == -1) |
| 2643 | return -1; |
| 2644 | if (fd == new) |
| 2645 | return new; |
| 2646 | ret = dup2 (old,new); |
| 2647 | emacs_close (fd); |
| 2648 | return ret; |
| 2649 | #endif |
| 2650 | } |
| 2651 | |
| 2652 | #endif /* not HAVE_DUP2 */ |
| 2653 | |
| 2654 | /* |
| 2655 | * Gettimeofday. Simulate as much as possible. Only accurate |
| 2656 | * to nearest second. Emacs doesn't use tzp so ignore it for now. |
| 2657 | * Only needed when subprocesses are defined. |
| 2658 | */ |
| 2659 | |
| 2660 | #ifdef subprocesses |
| 2661 | #ifndef HAVE_GETTIMEOFDAY |
| 2662 | #ifdef HAVE_TIMEVAL |
| 2663 | |
| 2664 | /* ARGSUSED */ |
| 2665 | int |
| 2666 | gettimeofday (tp, tzp) |
| 2667 | struct timeval *tp; |
| 2668 | struct timezone *tzp; |
| 2669 | { |
| 2670 | extern long time (); |
| 2671 | |
| 2672 | tp->tv_sec = time ((long *)0); |
| 2673 | tp->tv_usec = 0; |
| 2674 | if (tzp != 0) |
| 2675 | tzp->tz_minuteswest = -1; |
| 2676 | return 0; |
| 2677 | } |
| 2678 | |
| 2679 | #endif |
| 2680 | #endif |
| 2681 | #endif /* subprocess && !HAVE_GETTIMEOFDAY && HAVE_TIMEVAL */ |
| 2682 | |
| 2683 | /* |
| 2684 | * This function will go away as soon as all the stubs fixed. (fnf) |
| 2685 | */ |
| 2686 | |
| 2687 | void |
| 2688 | croak (badfunc) |
| 2689 | char *badfunc; |
| 2690 | { |
| 2691 | printf ("%s not yet implemented\r\n", badfunc); |
| 2692 | reset_all_sys_modes (); |
| 2693 | exit (1); |
| 2694 | } |
| 2695 | |
| 2696 | #endif /* USG */ |
| 2697 | \f |
| 2698 | /* Directory routines for systems that don't have them. */ |
| 2699 | |
| 2700 | #ifdef SYSV_SYSTEM_DIR |
| 2701 | |
| 2702 | #include <dirent.h> |
| 2703 | |
| 2704 | #if !defined (HAVE_CLOSEDIR) |
| 2705 | |
| 2706 | int |
| 2707 | closedir (DIR *dirp /* stream from opendir */) |
| 2708 | { |
| 2709 | int rtnval; |
| 2710 | |
| 2711 | rtnval = emacs_close (dirp->dd_fd); |
| 2712 | xfree ((char *) dirp); |
| 2713 | |
| 2714 | return rtnval; |
| 2715 | } |
| 2716 | #endif /* not HAVE_CLOSEDIR */ |
| 2717 | #endif /* SYSV_SYSTEM_DIR */ |
| 2718 | |
| 2719 | \f |
| 2720 | int |
| 2721 | set_file_times (filename, atime, mtime) |
| 2722 | const char *filename; |
| 2723 | EMACS_TIME atime, mtime; |
| 2724 | { |
| 2725 | #ifdef HAVE_UTIMES |
| 2726 | struct timeval tv[2]; |
| 2727 | tv[0] = atime; |
| 2728 | tv[1] = mtime; |
| 2729 | return utimes (filename, tv); |
| 2730 | #else /* not HAVE_UTIMES */ |
| 2731 | struct utimbuf utb; |
| 2732 | utb.actime = EMACS_SECS (atime); |
| 2733 | utb.modtime = EMACS_SECS (mtime); |
| 2734 | return utime (filename, &utb); |
| 2735 | #endif /* not HAVE_UTIMES */ |
| 2736 | } |
| 2737 | \f |
| 2738 | /* mkdir and rmdir functions, for systems which don't have them. */ |
| 2739 | |
| 2740 | #ifndef HAVE_MKDIR |
| 2741 | /* |
| 2742 | * Written by Robert Rother, Mariah Corporation, August 1985. |
| 2743 | * |
| 2744 | * If you want it, it's yours. All I ask in return is that if you |
| 2745 | * figure out how to do this in a Bourne Shell script you send me |
| 2746 | * a copy. |
| 2747 | * sdcsvax!rmr or rmr@uscd |
| 2748 | * |
| 2749 | * Severely hacked over by John Gilmore to make a 4.2BSD compatible |
| 2750 | * subroutine. 11Mar86; hoptoad!gnu |
| 2751 | * |
| 2752 | * Modified by rmtodd@uokmax 6-28-87 -- when making an already existing dir, |
| 2753 | * subroutine didn't return EEXIST. It does now. |
| 2754 | */ |
| 2755 | |
| 2756 | /* |
| 2757 | * Make a directory. |
| 2758 | */ |
| 2759 | int |
| 2760 | mkdir (dpath, dmode) |
| 2761 | char *dpath; |
| 2762 | int dmode; |
| 2763 | { |
| 2764 | int cpid, status, fd; |
| 2765 | struct stat statbuf; |
| 2766 | |
| 2767 | if (stat (dpath, &statbuf) == 0) |
| 2768 | { |
| 2769 | errno = EEXIST; /* Stat worked, so it already exists */ |
| 2770 | return -1; |
| 2771 | } |
| 2772 | |
| 2773 | /* If stat fails for a reason other than non-existence, return error */ |
| 2774 | if (errno != ENOENT) |
| 2775 | return -1; |
| 2776 | |
| 2777 | synch_process_alive = 1; |
| 2778 | switch (cpid = fork ()) |
| 2779 | { |
| 2780 | |
| 2781 | case -1: /* Error in fork */ |
| 2782 | return (-1); /* Errno is set already */ |
| 2783 | |
| 2784 | case 0: /* Child process */ |
| 2785 | /* |
| 2786 | * Cheap hack to set mode of new directory. Since this |
| 2787 | * child process is going away anyway, we zap its umask. |
| 2788 | * FIXME, this won't suffice to set SUID, SGID, etc. on this |
| 2789 | * directory. Does anybody care? |
| 2790 | */ |
| 2791 | status = umask (0); /* Get current umask */ |
| 2792 | status = umask (status | (0777 & ~dmode)); /* Set for mkdir */ |
| 2793 | fd = emacs_open ("/dev/null", O_RDWR, 0); |
| 2794 | if (fd >= 0) |
| 2795 | { |
| 2796 | dup2 (fd, 0); |
| 2797 | dup2 (fd, 1); |
| 2798 | dup2 (fd, 2); |
| 2799 | } |
| 2800 | execl ("/bin/mkdir", "mkdir", dpath, (char *) 0); |
| 2801 | _exit (-1); /* Can't exec /bin/mkdir */ |
| 2802 | |
| 2803 | default: /* Parent process */ |
| 2804 | wait_for_termination (cpid); |
| 2805 | } |
| 2806 | |
| 2807 | if (synch_process_death != 0 || synch_process_retcode != 0 |
| 2808 | || synch_process_termsig != 0) |
| 2809 | { |
| 2810 | errno = EIO; /* We don't know why, but */ |
| 2811 | return -1; /* /bin/mkdir failed */ |
| 2812 | } |
| 2813 | |
| 2814 | return 0; |
| 2815 | } |
| 2816 | #endif /* not HAVE_MKDIR */ |
| 2817 | |
| 2818 | #ifndef HAVE_RMDIR |
| 2819 | int |
| 2820 | rmdir (dpath) |
| 2821 | char *dpath; |
| 2822 | { |
| 2823 | int cpid, status, fd; |
| 2824 | struct stat statbuf; |
| 2825 | |
| 2826 | if (stat (dpath, &statbuf) != 0) |
| 2827 | { |
| 2828 | /* Stat just set errno. We don't have to */ |
| 2829 | return -1; |
| 2830 | } |
| 2831 | |
| 2832 | synch_process_alive = 1; |
| 2833 | switch (cpid = fork ()) |
| 2834 | { |
| 2835 | |
| 2836 | case -1: /* Error in fork */ |
| 2837 | return (-1); /* Errno is set already */ |
| 2838 | |
| 2839 | case 0: /* Child process */ |
| 2840 | fd = emacs_open ("/dev/null", O_RDWR, 0); |
| 2841 | if (fd >= 0) |
| 2842 | { |
| 2843 | dup2 (fd, 0); |
| 2844 | dup2 (fd, 1); |
| 2845 | dup2 (fd, 2); |
| 2846 | } |
| 2847 | execl ("/bin/rmdir", "rmdir", dpath, (char *) 0); |
| 2848 | _exit (-1); /* Can't exec /bin/rmdir */ |
| 2849 | |
| 2850 | default: /* Parent process */ |
| 2851 | wait_for_termination (cpid); |
| 2852 | } |
| 2853 | |
| 2854 | if (synch_process_death != 0 || synch_process_retcode != 0 |
| 2855 | || synch_process_termsig != 0) |
| 2856 | { |
| 2857 | errno = EIO; /* We don't know why, but */ |
| 2858 | return -1; /* /bin/rmdir failed */ |
| 2859 | } |
| 2860 | |
| 2861 | return 0; |
| 2862 | } |
| 2863 | #endif /* !HAVE_RMDIR */ |
| 2864 | |
| 2865 | \f |
| 2866 | #ifndef BSTRING |
| 2867 | |
| 2868 | #ifndef bzero |
| 2869 | |
| 2870 | void |
| 2871 | bzero (b, length) |
| 2872 | register char *b; |
| 2873 | register int length; |
| 2874 | { |
| 2875 | while (length-- > 0) |
| 2876 | *b++ = 0; |
| 2877 | } |
| 2878 | |
| 2879 | #endif /* no bzero */ |
| 2880 | #endif /* BSTRING */ |
| 2881 | |
| 2882 | #if (!defined (BSTRING) && !defined (bcopy)) || defined (NEED_BCOPY) |
| 2883 | #undef bcopy |
| 2884 | |
| 2885 | /* Saying `void' requires a declaration, above, where bcopy is used |
| 2886 | and that declaration causes pain for systems where bcopy is a macro. */ |
| 2887 | bcopy (b1, b2, length) |
| 2888 | register char *b1; |
| 2889 | register char *b2; |
| 2890 | register int length; |
| 2891 | { |
| 2892 | while (length-- > 0) |
| 2893 | *b2++ = *b1++; |
| 2894 | } |
| 2895 | #endif /* (!defined (BSTRING) && !defined (bcopy)) || defined (NEED_BCOPY) */ |
| 2896 | |
| 2897 | #ifndef BSTRING |
| 2898 | #ifndef bcmp |
| 2899 | int |
| 2900 | bcmp (b1, b2, length) /* This could be a macro! */ |
| 2901 | register char *b1; |
| 2902 | register char *b2; |
| 2903 | register int length; |
| 2904 | { |
| 2905 | while (length-- > 0) |
| 2906 | if (*b1++ != *b2++) |
| 2907 | return 1; |
| 2908 | |
| 2909 | return 0; |
| 2910 | } |
| 2911 | #endif /* no bcmp */ |
| 2912 | #endif /* not BSTRING */ |
| 2913 | \f |
| 2914 | #ifndef HAVE_STRSIGNAL |
| 2915 | char * |
| 2916 | strsignal (code) |
| 2917 | int code; |
| 2918 | { |
| 2919 | char *signame = 0; |
| 2920 | |
| 2921 | if (0 <= code && code < NSIG) |
| 2922 | { |
| 2923 | /* Cast to suppress warning if the table has const char *. */ |
| 2924 | signame = (char *) sys_siglist[code]; |
| 2925 | } |
| 2926 | |
| 2927 | return signame; |
| 2928 | } |
| 2929 | #endif /* HAVE_STRSIGNAL */ |
| 2930 | \f |
| 2931 | #ifdef HAVE_TERMIOS |
| 2932 | /* For make-serial-process */ |
| 2933 | int serial_open (char *port) |
| 2934 | { |
| 2935 | int fd = -1; |
| 2936 | |
| 2937 | fd = emacs_open ((char*) port, |
| 2938 | O_RDWR |
| 2939 | #ifdef O_NONBLOCK |
| 2940 | | O_NONBLOCK |
| 2941 | #else |
| 2942 | | O_NDELAY |
| 2943 | #endif |
| 2944 | #ifdef O_NOCTTY |
| 2945 | | O_NOCTTY |
| 2946 | #endif |
| 2947 | , 0); |
| 2948 | if (fd < 0) |
| 2949 | { |
| 2950 | error ("Could not open %s: %s", |
| 2951 | port, emacs_strerror (errno)); |
| 2952 | } |
| 2953 | #ifdef TIOCEXCL |
| 2954 | ioctl (fd, TIOCEXCL, (char *) 0); |
| 2955 | #endif |
| 2956 | |
| 2957 | return fd; |
| 2958 | } |
| 2959 | #endif /* TERMIOS */ |
| 2960 | |
| 2961 | #ifdef HAVE_TERMIOS |
| 2962 | |
| 2963 | #if !defined (HAVE_CFMAKERAW) |
| 2964 | /* Workaround for targets which are missing cfmakeraw. */ |
| 2965 | /* Pasted from man page. */ |
| 2966 | static void cfmakeraw (struct termios *termios_p) |
| 2967 | { |
| 2968 | termios_p->c_iflag &= ~(IGNBRK|BRKINT|PARMRK|ISTRIP|INLCR|IGNCR|ICRNL|IXON); |
| 2969 | termios_p->c_oflag &= ~OPOST; |
| 2970 | termios_p->c_lflag &= ~(ECHO|ECHONL|ICANON|ISIG|IEXTEN); |
| 2971 | termios_p->c_cflag &= ~(CSIZE|PARENB); |
| 2972 | termios_p->c_cflag |= CS8; |
| 2973 | } |
| 2974 | #endif /* !defined (HAVE_CFMAKERAW */ |
| 2975 | |
| 2976 | #if !defined (HAVE_CFSETSPEED) |
| 2977 | /* Workaround for targets which are missing cfsetspeed. */ |
| 2978 | static int cfsetspeed (struct termios *termios_p, speed_t vitesse) |
| 2979 | { |
| 2980 | return (cfsetispeed (termios_p, vitesse) |
| 2981 | + cfsetospeed (termios_p, vitesse)); |
| 2982 | } |
| 2983 | #endif |
| 2984 | |
| 2985 | /* For serial-process-configure */ |
| 2986 | void |
| 2987 | serial_configure (struct Lisp_Process *p, |
| 2988 | Lisp_Object contact) |
| 2989 | { |
| 2990 | Lisp_Object childp2 = Qnil; |
| 2991 | Lisp_Object tem = Qnil; |
| 2992 | struct termios attr; |
| 2993 | int err = -1; |
| 2994 | char summary[4] = "???"; /* This usually becomes "8N1". */ |
| 2995 | |
| 2996 | childp2 = Fcopy_sequence (p->childp); |
| 2997 | |
| 2998 | /* Read port attributes and prepare default configuration. */ |
| 2999 | err = tcgetattr (p->outfd, &attr); |
| 3000 | if (err != 0) |
| 3001 | error ("tcgetattr() failed: %s", emacs_strerror (errno)); |
| 3002 | cfmakeraw (&attr); |
| 3003 | #if defined (CLOCAL) |
| 3004 | attr.c_cflag |= CLOCAL; |
| 3005 | #endif |
| 3006 | #if defined (CREAD) |
| 3007 | attr.c_cflag |= CREAD; |
| 3008 | #endif |
| 3009 | |
| 3010 | /* Configure speed. */ |
| 3011 | if (!NILP (Fplist_member (contact, QCspeed))) |
| 3012 | tem = Fplist_get (contact, QCspeed); |
| 3013 | else |
| 3014 | tem = Fplist_get (p->childp, QCspeed); |
| 3015 | CHECK_NUMBER (tem); |
| 3016 | err = cfsetspeed (&attr, XINT (tem)); |
| 3017 | if (err != 0) |
| 3018 | error ("cfsetspeed(%d) failed: %s", XINT (tem), emacs_strerror (errno)); |
| 3019 | childp2 = Fplist_put (childp2, QCspeed, tem); |
| 3020 | |
| 3021 | /* Configure bytesize. */ |
| 3022 | if (!NILP (Fplist_member (contact, QCbytesize))) |
| 3023 | tem = Fplist_get (contact, QCbytesize); |
| 3024 | else |
| 3025 | tem = Fplist_get (p->childp, QCbytesize); |
| 3026 | if (NILP (tem)) |
| 3027 | tem = make_number (8); |
| 3028 | CHECK_NUMBER (tem); |
| 3029 | if (XINT (tem) != 7 && XINT (tem) != 8) |
| 3030 | error (":bytesize must be nil (8), 7, or 8"); |
| 3031 | summary[0] = XINT(tem) + '0'; |
| 3032 | #if defined (CSIZE) && defined (CS7) && defined (CS8) |
| 3033 | attr.c_cflag &= ~CSIZE; |
| 3034 | attr.c_cflag |= ((XINT (tem) == 7) ? CS7 : CS8); |
| 3035 | #else |
| 3036 | /* Don't error on bytesize 8, which should be set by cfmakeraw. */ |
| 3037 | if (XINT (tem) != 8) |
| 3038 | error ("Bytesize cannot be changed"); |
| 3039 | #endif |
| 3040 | childp2 = Fplist_put (childp2, QCbytesize, tem); |
| 3041 | |
| 3042 | /* Configure parity. */ |
| 3043 | if (!NILP (Fplist_member (contact, QCparity))) |
| 3044 | tem = Fplist_get (contact, QCparity); |
| 3045 | else |
| 3046 | tem = Fplist_get (p->childp, QCparity); |
| 3047 | if (!NILP (tem) && !EQ (tem, Qeven) && !EQ (tem, Qodd)) |
| 3048 | error (":parity must be nil (no parity), `even', or `odd'"); |
| 3049 | #if defined (PARENB) && defined (PARODD) && defined (IGNPAR) && defined (INPCK) |
| 3050 | attr.c_cflag &= ~(PARENB | PARODD); |
| 3051 | attr.c_iflag &= ~(IGNPAR | INPCK); |
| 3052 | if (NILP (tem)) |
| 3053 | { |
| 3054 | summary[1] = 'N'; |
| 3055 | } |
| 3056 | else if (EQ (tem, Qeven)) |
| 3057 | { |
| 3058 | summary[1] = 'E'; |
| 3059 | attr.c_cflag |= PARENB; |
| 3060 | attr.c_iflag |= (IGNPAR | INPCK); |
| 3061 | } |
| 3062 | else if (EQ (tem, Qodd)) |
| 3063 | { |
| 3064 | summary[1] = 'O'; |
| 3065 | attr.c_cflag |= (PARENB | PARODD); |
| 3066 | attr.c_iflag |= (IGNPAR | INPCK); |
| 3067 | } |
| 3068 | #else |
| 3069 | /* Don't error on no parity, which should be set by cfmakeraw. */ |
| 3070 | if (!NILP (tem)) |
| 3071 | error ("Parity cannot be configured"); |
| 3072 | #endif |
| 3073 | childp2 = Fplist_put (childp2, QCparity, tem); |
| 3074 | |
| 3075 | /* Configure stopbits. */ |
| 3076 | if (!NILP (Fplist_member (contact, QCstopbits))) |
| 3077 | tem = Fplist_get (contact, QCstopbits); |
| 3078 | else |
| 3079 | tem = Fplist_get (p->childp, QCstopbits); |
| 3080 | if (NILP (tem)) |
| 3081 | tem = make_number (1); |
| 3082 | CHECK_NUMBER (tem); |
| 3083 | if (XINT (tem) != 1 && XINT (tem) != 2) |
| 3084 | error (":stopbits must be nil (1 stopbit), 1, or 2"); |
| 3085 | summary[2] = XINT (tem) + '0'; |
| 3086 | #if defined (CSTOPB) |
| 3087 | attr.c_cflag &= ~CSTOPB; |
| 3088 | if (XINT (tem) == 2) |
| 3089 | attr.c_cflag |= CSTOPB; |
| 3090 | #else |
| 3091 | /* Don't error on 1 stopbit, which should be set by cfmakeraw. */ |
| 3092 | if (XINT (tem) != 1) |
| 3093 | error ("Stopbits cannot be configured"); |
| 3094 | #endif |
| 3095 | childp2 = Fplist_put (childp2, QCstopbits, tem); |
| 3096 | |
| 3097 | /* Configure flowcontrol. */ |
| 3098 | if (!NILP (Fplist_member (contact, QCflowcontrol))) |
| 3099 | tem = Fplist_get (contact, QCflowcontrol); |
| 3100 | else |
| 3101 | tem = Fplist_get (p->childp, QCflowcontrol); |
| 3102 | if (!NILP (tem) && !EQ (tem, Qhw) && !EQ (tem, Qsw)) |
| 3103 | error (":flowcontrol must be nil (no flowcontrol), `hw', or `sw'"); |
| 3104 | #if defined (CRTSCTS) |
| 3105 | attr.c_cflag &= ~CRTSCTS; |
| 3106 | #endif |
| 3107 | #if defined (CNEW_RTSCTS) |
| 3108 | attr.c_cflag &= ~CNEW_RTSCTS; |
| 3109 | #endif |
| 3110 | #if defined (IXON) && defined (IXOFF) |
| 3111 | attr.c_iflag &= ~(IXON | IXOFF); |
| 3112 | #endif |
| 3113 | if (NILP (tem)) |
| 3114 | { |
| 3115 | /* Already configured. */ |
| 3116 | } |
| 3117 | else if (EQ (tem, Qhw)) |
| 3118 | { |
| 3119 | #if defined (CRTSCTS) |
| 3120 | attr.c_cflag |= CRTSCTS; |
| 3121 | #elif defined (CNEW_RTSCTS) |
| 3122 | attr.c_cflag |= CNEW_RTSCTS; |
| 3123 | #else |
| 3124 | error ("Hardware flowcontrol (RTS/CTS) not supported"); |
| 3125 | #endif |
| 3126 | } |
| 3127 | else if (EQ (tem, Qsw)) |
| 3128 | { |
| 3129 | #if defined (IXON) && defined (IXOFF) |
| 3130 | attr.c_iflag |= (IXON | IXOFF); |
| 3131 | #else |
| 3132 | error ("Software flowcontrol (XON/XOFF) not supported"); |
| 3133 | #endif |
| 3134 | } |
| 3135 | childp2 = Fplist_put (childp2, QCflowcontrol, tem); |
| 3136 | |
| 3137 | /* Activate configuration. */ |
| 3138 | err = tcsetattr (p->outfd, TCSANOW, &attr); |
| 3139 | if (err != 0) |
| 3140 | error ("tcsetattr() failed: %s", emacs_strerror (errno)); |
| 3141 | |
| 3142 | childp2 = Fplist_put (childp2, QCsummary, build_string (summary)); |
| 3143 | p->childp = childp2; |
| 3144 | |
| 3145 | } |
| 3146 | #endif /* TERMIOS */ |
| 3147 | \f |
| 3148 | /* System depended enumeration of and access to system processes a-la ps(1). */ |
| 3149 | |
| 3150 | #ifdef HAVE_PROCFS |
| 3151 | |
| 3152 | /* Process enumeration and access via /proc. */ |
| 3153 | |
| 3154 | Lisp_Object |
| 3155 | list_system_processes () |
| 3156 | { |
| 3157 | Lisp_Object procdir, match, proclist, next; |
| 3158 | struct gcpro gcpro1, gcpro2; |
| 3159 | register Lisp_Object tail; |
| 3160 | |
| 3161 | GCPRO2 (procdir, match); |
| 3162 | /* For every process on the system, there's a directory in the |
| 3163 | "/proc" pseudo-directory whose name is the numeric ID of that |
| 3164 | process. */ |
| 3165 | procdir = build_string ("/proc"); |
| 3166 | match = build_string ("[0-9]+"); |
| 3167 | proclist = directory_files_internal (procdir, Qnil, match, Qt, 0, Qnil); |
| 3168 | |
| 3169 | /* `proclist' gives process IDs as strings. Destructively convert |
| 3170 | each string into a number. */ |
| 3171 | for (tail = proclist; CONSP (tail); tail = next) |
| 3172 | { |
| 3173 | next = XCDR (tail); |
| 3174 | XSETCAR (tail, Fstring_to_number (XCAR (tail), Qnil)); |
| 3175 | } |
| 3176 | UNGCPRO; |
| 3177 | |
| 3178 | /* directory_files_internal returns the files in reverse order; undo |
| 3179 | that. */ |
| 3180 | proclist = Fnreverse (proclist); |
| 3181 | return proclist; |
| 3182 | } |
| 3183 | |
| 3184 | /* The WINDOWSNT implementation is in w32.c. |
| 3185 | The MSDOS implementation is in dosfns.c. */ |
| 3186 | #elif !defined (WINDOWSNT) && !defined (MSDOS) |
| 3187 | |
| 3188 | Lisp_Object |
| 3189 | list_system_processes () |
| 3190 | { |
| 3191 | return Qnil; |
| 3192 | } |
| 3193 | |
| 3194 | #endif /* !defined (WINDOWSNT) */ |
| 3195 | |
| 3196 | #ifdef GNU_LINUX |
| 3197 | static void |
| 3198 | time_from_jiffies (unsigned long long tval, long hz, |
| 3199 | time_t *sec, unsigned *usec) |
| 3200 | { |
| 3201 | unsigned long long ullsec; |
| 3202 | |
| 3203 | *sec = tval / hz; |
| 3204 | ullsec = *sec; |
| 3205 | tval -= ullsec * hz; |
| 3206 | /* Careful: if HZ > 1 million, then integer division by it yields zero. */ |
| 3207 | if (hz <= 1000000) |
| 3208 | *usec = tval * 1000000 / hz; |
| 3209 | else |
| 3210 | *usec = tval / (hz / 1000000); |
| 3211 | } |
| 3212 | |
| 3213 | static Lisp_Object |
| 3214 | ltime_from_jiffies (unsigned long long tval, long hz) |
| 3215 | { |
| 3216 | time_t sec; |
| 3217 | unsigned usec; |
| 3218 | |
| 3219 | time_from_jiffies (tval, hz, &sec, &usec); |
| 3220 | |
| 3221 | return list3 (make_number ((sec >> 16) & 0xffff), |
| 3222 | make_number (sec & 0xffff), |
| 3223 | make_number (usec)); |
| 3224 | } |
| 3225 | |
| 3226 | static void |
| 3227 | get_up_time (time_t *sec, unsigned *usec) |
| 3228 | { |
| 3229 | FILE *fup; |
| 3230 | |
| 3231 | *sec = *usec = 0; |
| 3232 | |
| 3233 | BLOCK_INPUT; |
| 3234 | fup = fopen ("/proc/uptime", "r"); |
| 3235 | |
| 3236 | if (fup) |
| 3237 | { |
| 3238 | double uptime, idletime; |
| 3239 | |
| 3240 | /* The numbers in /proc/uptime use C-locale decimal point, but |
| 3241 | we already set ourselves to the C locale (see `fixup_locale' |
| 3242 | in emacs.c). */ |
| 3243 | if (2 <= fscanf (fup, "%lf %lf", &uptime, &idletime)) |
| 3244 | { |
| 3245 | *sec = uptime; |
| 3246 | *usec = (uptime - *sec) * 1000000; |
| 3247 | } |
| 3248 | fclose (fup); |
| 3249 | } |
| 3250 | UNBLOCK_INPUT; |
| 3251 | } |
| 3252 | |
| 3253 | #define MAJOR(d) (((unsigned)(d) >> 8) & 0xfff) |
| 3254 | #define MINOR(d) (((unsigned)(d) & 0xff) | (((unsigned)(d) & 0xfff00000) >> 12)) |
| 3255 | |
| 3256 | static Lisp_Object |
| 3257 | procfs_ttyname (int rdev) |
| 3258 | { |
| 3259 | FILE *fdev = NULL; |
| 3260 | char name[PATH_MAX]; |
| 3261 | |
| 3262 | BLOCK_INPUT; |
| 3263 | fdev = fopen ("/proc/tty/drivers", "r"); |
| 3264 | |
| 3265 | if (fdev) |
| 3266 | { |
| 3267 | unsigned major; |
| 3268 | unsigned long minor_beg, minor_end; |
| 3269 | char minor[25]; /* 2 32-bit numbers + dash */ |
| 3270 | char *endp; |
| 3271 | |
| 3272 | while (!feof (fdev) && !ferror (fdev)) |
| 3273 | { |
| 3274 | if (3 <= fscanf (fdev, "%*s %s %u %s %*s\n", name, &major, minor) |
| 3275 | && major == MAJOR (rdev)) |
| 3276 | { |
| 3277 | minor_beg = strtoul (minor, &endp, 0); |
| 3278 | if (*endp == '\0') |
| 3279 | minor_end = minor_beg; |
| 3280 | else if (*endp == '-') |
| 3281 | minor_end = strtoul (endp + 1, &endp, 0); |
| 3282 | else |
| 3283 | continue; |
| 3284 | |
| 3285 | if (MINOR (rdev) >= minor_beg && MINOR (rdev) <= minor_end) |
| 3286 | { |
| 3287 | sprintf (name + strlen (name), "%u", MINOR (rdev)); |
| 3288 | break; |
| 3289 | } |
| 3290 | } |
| 3291 | } |
| 3292 | fclose (fdev); |
| 3293 | } |
| 3294 | UNBLOCK_INPUT; |
| 3295 | return build_string (name); |
| 3296 | } |
| 3297 | |
| 3298 | static unsigned long |
| 3299 | procfs_get_total_memory (void) |
| 3300 | { |
| 3301 | FILE *fmem = NULL; |
| 3302 | unsigned long retval = 2 * 1024 * 1024; /* default: 2GB */ |
| 3303 | |
| 3304 | BLOCK_INPUT; |
| 3305 | fmem = fopen ("/proc/meminfo", "r"); |
| 3306 | |
| 3307 | if (fmem) |
| 3308 | { |
| 3309 | unsigned long entry_value; |
| 3310 | char entry_name[20]; /* the longest I saw is 13+1 */ |
| 3311 | |
| 3312 | while (!feof (fmem) && !ferror (fmem)) |
| 3313 | { |
| 3314 | if (2 <= fscanf (fmem, "%s %lu kB\n", entry_name, &entry_value) |
| 3315 | && strcmp (entry_name, "MemTotal:") == 0) |
| 3316 | { |
| 3317 | retval = entry_value; |
| 3318 | break; |
| 3319 | } |
| 3320 | } |
| 3321 | fclose (fmem); |
| 3322 | } |
| 3323 | UNBLOCK_INPUT; |
| 3324 | return retval; |
| 3325 | } |
| 3326 | |
| 3327 | Lisp_Object |
| 3328 | system_process_attributes (Lisp_Object pid) |
| 3329 | { |
| 3330 | char procfn[PATH_MAX], fn[PATH_MAX]; |
| 3331 | struct stat st; |
| 3332 | struct passwd *pw; |
| 3333 | struct group *gr; |
| 3334 | long clocks_per_sec; |
| 3335 | char *procfn_end; |
| 3336 | char procbuf[1025], *p, *q; |
| 3337 | int fd; |
| 3338 | ssize_t nread; |
| 3339 | const char *cmd = NULL; |
| 3340 | char *cmdline = NULL; |
| 3341 | size_t cmdsize = 0, cmdline_size; |
| 3342 | unsigned char c; |
| 3343 | int proc_id, ppid, uid, gid, pgrp, sess, tty, tpgid, thcount; |
| 3344 | unsigned long long utime, stime, cutime, cstime, start; |
| 3345 | long priority, nice, rss; |
| 3346 | unsigned long minflt, majflt, cminflt, cmajflt, vsize; |
| 3347 | time_t sec; |
| 3348 | unsigned usec; |
| 3349 | EMACS_TIME tnow, tstart, tboot, telapsed; |
| 3350 | double pcpu, pmem; |
| 3351 | Lisp_Object attrs = Qnil; |
| 3352 | Lisp_Object cmd_str, decoded_cmd, tem; |
| 3353 | struct gcpro gcpro1, gcpro2; |
| 3354 | EMACS_INT uid_eint, gid_eint; |
| 3355 | |
| 3356 | CHECK_NUMBER_OR_FLOAT (pid); |
| 3357 | proc_id = FLOATP (pid) ? XFLOAT_DATA (pid) : XINT (pid); |
| 3358 | sprintf (procfn, "/proc/%u", proc_id); |
| 3359 | if (stat (procfn, &st) < 0) |
| 3360 | return attrs; |
| 3361 | |
| 3362 | GCPRO2 (attrs, decoded_cmd); |
| 3363 | |
| 3364 | /* euid egid */ |
| 3365 | uid = st.st_uid; |
| 3366 | /* Use of EMACS_INT stops GCC whining about limited range of data type. */ |
| 3367 | uid_eint = uid; |
| 3368 | attrs = Fcons (Fcons (Qeuid, make_fixnum_or_float (uid_eint)), attrs); |
| 3369 | BLOCK_INPUT; |
| 3370 | pw = getpwuid (uid); |
| 3371 | UNBLOCK_INPUT; |
| 3372 | if (pw) |
| 3373 | attrs = Fcons (Fcons (Quser, build_string (pw->pw_name)), attrs); |
| 3374 | |
| 3375 | gid = st.st_gid; |
| 3376 | gid_eint = gid; |
| 3377 | attrs = Fcons (Fcons (Qegid, make_fixnum_or_float (gid_eint)), attrs); |
| 3378 | BLOCK_INPUT; |
| 3379 | gr = getgrgid (gid); |
| 3380 | UNBLOCK_INPUT; |
| 3381 | if (gr) |
| 3382 | attrs = Fcons (Fcons (Qgroup, build_string (gr->gr_name)), attrs); |
| 3383 | |
| 3384 | strcpy (fn, procfn); |
| 3385 | procfn_end = fn + strlen (fn); |
| 3386 | strcpy (procfn_end, "/stat"); |
| 3387 | fd = emacs_open (fn, O_RDONLY, 0); |
| 3388 | if (fd >= 0 && (nread = emacs_read (fd, procbuf, sizeof(procbuf) - 1)) > 0) |
| 3389 | { |
| 3390 | procbuf[nread] = '\0'; |
| 3391 | p = procbuf; |
| 3392 | |
| 3393 | p = strchr (p, '('); |
| 3394 | if (p != NULL) |
| 3395 | { |
| 3396 | q = strrchr (p + 1, ')'); |
| 3397 | /* comm */ |
| 3398 | if (q != NULL) |
| 3399 | { |
| 3400 | cmd = p + 1; |
| 3401 | cmdsize = q - cmd; |
| 3402 | } |
| 3403 | } |
| 3404 | else |
| 3405 | q = NULL; |
| 3406 | if (cmd == NULL) |
| 3407 | { |
| 3408 | cmd = "???"; |
| 3409 | cmdsize = 3; |
| 3410 | } |
| 3411 | /* Command name is encoded in locale-coding-system; decode it. */ |
| 3412 | cmd_str = make_unibyte_string (cmd, cmdsize); |
| 3413 | decoded_cmd = code_convert_string_norecord (cmd_str, |
| 3414 | Vlocale_coding_system, 0); |
| 3415 | attrs = Fcons (Fcons (Qcomm, decoded_cmd), attrs); |
| 3416 | |
| 3417 | if (q) |
| 3418 | { |
| 3419 | EMACS_INT ppid_eint, pgrp_eint, sess_eint, tpgid_eint, thcount_eint; |
| 3420 | p = q + 2; |
| 3421 | /* state ppid pgrp sess tty tpgid . minflt cminflt majflt cmajflt utime stime cutime cstime priority nice thcount . start vsize rss */ |
| 3422 | sscanf (p, "%c %d %d %d %d %d %*u %lu %lu %lu %lu %Lu %Lu %Lu %Lu %ld %ld %d %*d %Lu %lu %ld", |
| 3423 | &c, &ppid, &pgrp, &sess, &tty, &tpgid, |
| 3424 | &minflt, &cminflt, &majflt, &cmajflt, |
| 3425 | &utime, &stime, &cutime, &cstime, |
| 3426 | &priority, &nice, &thcount, &start, &vsize, &rss); |
| 3427 | { |
| 3428 | char state_str[2]; |
| 3429 | |
| 3430 | state_str[0] = c; |
| 3431 | state_str[1] = '\0'; |
| 3432 | tem = build_string (state_str); |
| 3433 | attrs = Fcons (Fcons (Qstate, tem), attrs); |
| 3434 | } |
| 3435 | /* Stops GCC whining about limited range of data type. */ |
| 3436 | ppid_eint = ppid; |
| 3437 | pgrp_eint = pgrp; |
| 3438 | sess_eint = sess; |
| 3439 | tpgid_eint = tpgid; |
| 3440 | thcount_eint = thcount; |
| 3441 | attrs = Fcons (Fcons (Qppid, make_fixnum_or_float (ppid_eint)), attrs); |
| 3442 | attrs = Fcons (Fcons (Qpgrp, make_fixnum_or_float (pgrp_eint)), attrs); |
| 3443 | attrs = Fcons (Fcons (Qsess, make_fixnum_or_float (sess_eint)), attrs); |
| 3444 | attrs = Fcons (Fcons (Qttname, procfs_ttyname (tty)), attrs); |
| 3445 | attrs = Fcons (Fcons (Qtpgid, make_fixnum_or_float (tpgid_eint)), attrs); |
| 3446 | attrs = Fcons (Fcons (Qminflt, make_fixnum_or_float (minflt)), attrs); |
| 3447 | attrs = Fcons (Fcons (Qmajflt, make_fixnum_or_float (majflt)), attrs); |
| 3448 | attrs = Fcons (Fcons (Qcminflt, make_fixnum_or_float (cminflt)), attrs); |
| 3449 | attrs = Fcons (Fcons (Qcmajflt, make_fixnum_or_float (cmajflt)), attrs); |
| 3450 | clocks_per_sec = sysconf (_SC_CLK_TCK); |
| 3451 | if (clocks_per_sec < 0) |
| 3452 | clocks_per_sec = 100; |
| 3453 | attrs = Fcons (Fcons (Qutime, |
| 3454 | ltime_from_jiffies (utime, clocks_per_sec)), |
| 3455 | attrs); |
| 3456 | attrs = Fcons (Fcons (Qstime, |
| 3457 | ltime_from_jiffies (stime, clocks_per_sec)), |
| 3458 | attrs); |
| 3459 | attrs = Fcons (Fcons (Qtime, |
| 3460 | ltime_from_jiffies (stime+utime, clocks_per_sec)), |
| 3461 | attrs); |
| 3462 | attrs = Fcons (Fcons (Qcutime, |
| 3463 | ltime_from_jiffies (cutime, clocks_per_sec)), |
| 3464 | attrs); |
| 3465 | attrs = Fcons (Fcons (Qcstime, |
| 3466 | ltime_from_jiffies (cstime, clocks_per_sec)), |
| 3467 | attrs); |
| 3468 | attrs = Fcons (Fcons (Qctime, |
| 3469 | ltime_from_jiffies (cstime+cutime, clocks_per_sec)), |
| 3470 | attrs); |
| 3471 | attrs = Fcons (Fcons (Qpri, make_number (priority)), attrs); |
| 3472 | attrs = Fcons (Fcons (Qnice, make_number (nice)), attrs); |
| 3473 | attrs = Fcons (Fcons (Qthcount, make_fixnum_or_float (thcount_eint)), attrs); |
| 3474 | EMACS_GET_TIME (tnow); |
| 3475 | get_up_time (&sec, &usec); |
| 3476 | EMACS_SET_SECS (telapsed, sec); |
| 3477 | EMACS_SET_USECS (telapsed, usec); |
| 3478 | EMACS_SUB_TIME (tboot, tnow, telapsed); |
| 3479 | time_from_jiffies (start, clocks_per_sec, &sec, &usec); |
| 3480 | EMACS_SET_SECS (tstart, sec); |
| 3481 | EMACS_SET_USECS (tstart, usec); |
| 3482 | EMACS_ADD_TIME (tstart, tboot, tstart); |
| 3483 | attrs = Fcons (Fcons (Qstart, |
| 3484 | list3 (make_number |
| 3485 | ((EMACS_SECS (tstart) >> 16) & 0xffff), |
| 3486 | make_number |
| 3487 | (EMACS_SECS (tstart) & 0xffff), |
| 3488 | make_number |
| 3489 | (EMACS_USECS (tstart)))), |
| 3490 | attrs); |
| 3491 | attrs = Fcons (Fcons (Qvsize, make_fixnum_or_float (vsize/1024)), attrs); |
| 3492 | attrs = Fcons (Fcons (Qrss, make_fixnum_or_float (4*rss)), attrs); |
| 3493 | EMACS_SUB_TIME (telapsed, tnow, tstart); |
| 3494 | attrs = Fcons (Fcons (Qetime, |
| 3495 | list3 (make_number |
| 3496 | ((EMACS_SECS (telapsed) >> 16) & 0xffff), |
| 3497 | make_number |
| 3498 | (EMACS_SECS (telapsed) & 0xffff), |
| 3499 | make_number |
| 3500 | (EMACS_USECS (telapsed)))), |
| 3501 | attrs); |
| 3502 | time_from_jiffies (utime + stime, clocks_per_sec, &sec, &usec); |
| 3503 | pcpu = (sec + usec / 1000000.0) / (EMACS_SECS (telapsed) + EMACS_USECS (telapsed) / 1000000.0); |
| 3504 | if (pcpu > 1.0) |
| 3505 | pcpu = 1.0; |
| 3506 | attrs = Fcons (Fcons (Qpcpu, make_float (100 * pcpu)), attrs); |
| 3507 | pmem = 4.0 * 100 * rss / procfs_get_total_memory (); |
| 3508 | if (pmem > 100) |
| 3509 | pmem = 100; |
| 3510 | attrs = Fcons (Fcons (Qpmem, make_float (pmem)), attrs); |
| 3511 | } |
| 3512 | } |
| 3513 | if (fd >= 0) |
| 3514 | emacs_close (fd); |
| 3515 | |
| 3516 | /* args */ |
| 3517 | strcpy (procfn_end, "/cmdline"); |
| 3518 | fd = emacs_open (fn, O_RDONLY, 0); |
| 3519 | if (fd >= 0) |
| 3520 | { |
| 3521 | for (cmdline_size = 0; emacs_read (fd, &c, 1) == 1; cmdline_size++) |
| 3522 | { |
| 3523 | if (isspace (c) || c == '\\') |
| 3524 | cmdline_size++; /* for later quoting, see below */ |
| 3525 | } |
| 3526 | if (cmdline_size) |
| 3527 | { |
| 3528 | cmdline = xmalloc (cmdline_size + 1); |
| 3529 | lseek (fd, 0L, SEEK_SET); |
| 3530 | cmdline[0] = '\0'; |
| 3531 | if ((nread = read (fd, cmdline, cmdline_size)) >= 0) |
| 3532 | cmdline[nread++] = '\0'; |
| 3533 | else |
| 3534 | { |
| 3535 | /* Assigning zero to `nread' makes us skip the following |
| 3536 | two loops, assign zero to cmdline_size, and enter the |
| 3537 | following `if' clause that handles unknown command |
| 3538 | lines. */ |
| 3539 | nread = 0; |
| 3540 | } |
| 3541 | /* We don't want trailing null characters. */ |
| 3542 | for (p = cmdline + nread - 1; p > cmdline && !*p; p--) |
| 3543 | nread--; |
| 3544 | for (p = cmdline; p < cmdline + nread; p++) |
| 3545 | { |
| 3546 | /* Escape-quote whitespace and backslashes. */ |
| 3547 | if (isspace (*p) || *p == '\\') |
| 3548 | { |
| 3549 | memmove (p + 1, p, nread - (p - cmdline)); |
| 3550 | nread++; |
| 3551 | *p++ = '\\'; |
| 3552 | } |
| 3553 | else if (*p == '\0') |
| 3554 | *p = ' '; |
| 3555 | } |
| 3556 | cmdline_size = nread; |
| 3557 | } |
| 3558 | if (!cmdline_size) |
| 3559 | { |
| 3560 | if (!cmd) |
| 3561 | cmd = "???"; |
| 3562 | if (!cmdsize) |
| 3563 | cmdsize = strlen (cmd); |
| 3564 | cmdline_size = cmdsize + 2; |
| 3565 | cmdline = xmalloc (cmdline_size + 1); |
| 3566 | strcpy (cmdline, "["); |
| 3567 | strcat (strncat (cmdline, cmd, cmdsize), "]"); |
| 3568 | } |
| 3569 | emacs_close (fd); |
| 3570 | /* Command line is encoded in locale-coding-system; decode it. */ |
| 3571 | cmd_str = make_unibyte_string (cmdline, cmdline_size); |
| 3572 | decoded_cmd = code_convert_string_norecord (cmd_str, |
| 3573 | Vlocale_coding_system, 0); |
| 3574 | xfree (cmdline); |
| 3575 | attrs = Fcons (Fcons (Qargs, decoded_cmd), attrs); |
| 3576 | } |
| 3577 | |
| 3578 | UNGCPRO; |
| 3579 | return attrs; |
| 3580 | } |
| 3581 | |
| 3582 | #elif defined (SOLARIS2) && defined (HAVE_PROCFS) |
| 3583 | |
| 3584 | /* The <procfs.h> header does not like to be included if _LP64 is defined and |
| 3585 | __FILE_OFFSET_BITS == 64. This is an ugly workaround that. */ |
| 3586 | #if !defined (_LP64) && defined (_FILE_OFFSET_BITS) && (_FILE_OFFSET_BITS == 64) |
| 3587 | #define PROCFS_FILE_OFFSET_BITS_HACK 1 |
| 3588 | #undef _FILE_OFFSET_BITS |
| 3589 | #else |
| 3590 | #define PROCFS_FILE_OFFSET_BITS_HACK 0 |
| 3591 | #endif |
| 3592 | |
| 3593 | #include <procfs.h> |
| 3594 | |
| 3595 | #if PROCFS_FILE_OFFSET_BITS_HACK == 1 |
| 3596 | #define _FILE_OFFSET_BITS 64 |
| 3597 | #endif /* PROCFS_FILE_OFFSET_BITS_HACK == 1 */ |
| 3598 | |
| 3599 | Lisp_Object |
| 3600 | system_process_attributes (Lisp_Object pid) |
| 3601 | { |
| 3602 | char procfn[PATH_MAX], fn[PATH_MAX]; |
| 3603 | struct stat st; |
| 3604 | struct passwd *pw; |
| 3605 | struct group *gr; |
| 3606 | char *procfn_end; |
| 3607 | struct psinfo pinfo; |
| 3608 | int fd; |
| 3609 | ssize_t nread; |
| 3610 | int proc_id, uid, gid; |
| 3611 | Lisp_Object attrs = Qnil; |
| 3612 | Lisp_Object decoded_cmd, tem; |
| 3613 | struct gcpro gcpro1, gcpro2; |
| 3614 | EMACS_INT uid_eint, gid_eint; |
| 3615 | |
| 3616 | CHECK_NUMBER_OR_FLOAT (pid); |
| 3617 | proc_id = FLOATP (pid) ? XFLOAT_DATA (pid) : XINT (pid); |
| 3618 | sprintf (procfn, "/proc/%u", proc_id); |
| 3619 | if (stat (procfn, &st) < 0) |
| 3620 | return attrs; |
| 3621 | |
| 3622 | GCPRO2 (attrs, decoded_cmd); |
| 3623 | |
| 3624 | /* euid egid */ |
| 3625 | uid = st.st_uid; |
| 3626 | /* Use of EMACS_INT stops GCC whining about limited range of data type. */ |
| 3627 | uid_eint = uid; |
| 3628 | attrs = Fcons (Fcons (Qeuid, make_fixnum_or_float (uid_eint)), attrs); |
| 3629 | BLOCK_INPUT; |
| 3630 | pw = getpwuid (uid); |
| 3631 | UNBLOCK_INPUT; |
| 3632 | if (pw) |
| 3633 | attrs = Fcons (Fcons (Quser, build_string (pw->pw_name)), attrs); |
| 3634 | |
| 3635 | gid = st.st_gid; |
| 3636 | gid_eint = gid; |
| 3637 | attrs = Fcons (Fcons (Qegid, make_fixnum_or_float (gid_eint)), attrs); |
| 3638 | BLOCK_INPUT; |
| 3639 | gr = getgrgid (gid); |
| 3640 | UNBLOCK_INPUT; |
| 3641 | if (gr) |
| 3642 | attrs = Fcons (Fcons (Qgroup, build_string (gr->gr_name)), attrs); |
| 3643 | |
| 3644 | strcpy (fn, procfn); |
| 3645 | procfn_end = fn + strlen (fn); |
| 3646 | strcpy (procfn_end, "/psinfo"); |
| 3647 | fd = emacs_open (fn, O_RDONLY, 0); |
| 3648 | if (fd >= 0 |
| 3649 | && (nread = read (fd, (char*)&pinfo, sizeof(struct psinfo)) > 0)) |
| 3650 | { |
| 3651 | attrs = Fcons (Fcons (Qppid, make_fixnum_or_float (pinfo.pr_ppid)), attrs); |
| 3652 | attrs = Fcons (Fcons (Qpgrp, make_fixnum_or_float (pinfo.pr_pgid)), attrs); |
| 3653 | attrs = Fcons (Fcons (Qsess, make_fixnum_or_float (pinfo.pr_sid)), attrs); |
| 3654 | |
| 3655 | { |
| 3656 | char state_str[2]; |
| 3657 | state_str[0] = pinfo.pr_lwp.pr_sname; |
| 3658 | state_str[1] = '\0'; |
| 3659 | tem = build_string (state_str); |
| 3660 | attrs = Fcons (Fcons (Qstate, tem), attrs); |
| 3661 | } |
| 3662 | |
| 3663 | /* FIXME: missing Qttyname. psinfo.pr_ttydev is a dev_t, |
| 3664 | need to get a string from it. */ |
| 3665 | |
| 3666 | /* FIXME: missing: Qtpgid */ |
| 3667 | |
| 3668 | /* FIXME: missing: |
| 3669 | Qminflt |
| 3670 | Qmajflt |
| 3671 | Qcminflt |
| 3672 | Qcmajflt |
| 3673 | |
| 3674 | Qutime |
| 3675 | Qcutime |
| 3676 | Qstime |
| 3677 | Qcstime |
| 3678 | Are they available? */ |
| 3679 | |
| 3680 | attrs = Fcons (Fcons (Qtime, |
| 3681 | list3 (make_number (pinfo.pr_time.tv_sec >> 16), |
| 3682 | make_number (pinfo.pr_time.tv_sec & 0xffff), |
| 3683 | make_number (pinfo.pr_time.tv_nsec))), |
| 3684 | attrs); |
| 3685 | |
| 3686 | attrs = Fcons (Fcons (Qctime, |
| 3687 | list3 (make_number (pinfo.pr_ctime.tv_sec >> 16), |
| 3688 | make_number (pinfo.pr_ctime.tv_sec & 0xffff), |
| 3689 | make_number (pinfo.pr_ctime.tv_nsec))), |
| 3690 | attrs); |
| 3691 | |
| 3692 | attrs = Fcons (Fcons (Qpri, make_number (pinfo.pr_lwp.pr_pri)), attrs); |
| 3693 | attrs = Fcons (Fcons (Qnice, make_number (pinfo.pr_lwp.pr_nice)), attrs); |
| 3694 | attrs = Fcons (Fcons (Qthcount, make_fixnum_or_float (pinfo.pr_nlwp)), attrs); |
| 3695 | |
| 3696 | attrs = Fcons (Fcons (Qstart, |
| 3697 | list3 (make_number (pinfo.pr_start.tv_sec >> 16), |
| 3698 | make_number (pinfo.pr_start.tv_sec & 0xffff), |
| 3699 | make_number (pinfo.pr_start.tv_nsec))), |
| 3700 | attrs); |
| 3701 | attrs = Fcons (Fcons (Qvsize, make_fixnum_or_float (pinfo.pr_size)), attrs); |
| 3702 | attrs = Fcons (Fcons (Qrss, make_fixnum_or_float (pinfo.pr_rssize)), attrs); |
| 3703 | |
| 3704 | /* pr_pctcpu and pr_pctmem are encoded as a fixed point 16 bit number in [0 ... 1]. */ |
| 3705 | attrs = Fcons (Fcons (Qpcpu, (pinfo.pr_pctcpu * 100.0) / (double)0x8000), attrs); |
| 3706 | attrs = Fcons (Fcons (Qpmem, (pinfo.pr_pctmem * 100.0) / (double)0x8000), attrs); |
| 3707 | |
| 3708 | decoded_cmd |
| 3709 | = code_convert_string_norecord (make_unibyte_string (pinfo.pr_fname, |
| 3710 | strlen (pinfo.pr_fname)), |
| 3711 | Vlocale_coding_system, 0); |
| 3712 | attrs = Fcons (Fcons (Qcomm, decoded_cmd), attrs); |
| 3713 | decoded_cmd |
| 3714 | = code_convert_string_norecord (make_unibyte_string (pinfo.pr_psargs, |
| 3715 | strlen (pinfo.pr_psargs)), |
| 3716 | Vlocale_coding_system, 0); |
| 3717 | attrs = Fcons (Fcons (Qargs, decoded_cmd), attrs); |
| 3718 | } |
| 3719 | |
| 3720 | if (fd >= 0) |
| 3721 | emacs_close (fd); |
| 3722 | |
| 3723 | UNGCPRO; |
| 3724 | return attrs; |
| 3725 | } |
| 3726 | |
| 3727 | /* The WINDOWSNT implementation is in w32.c. |
| 3728 | The MSDOS implementation is in dosfns.c. */ |
| 3729 | #elif !defined (WINDOWSNT) && !defined (MSDOS) |
| 3730 | |
| 3731 | Lisp_Object |
| 3732 | system_process_attributes (Lisp_Object pid) |
| 3733 | { |
| 3734 | return Qnil; |
| 3735 | } |
| 3736 | |
| 3737 | #endif /* !defined (WINDOWSNT) */ |
| 3738 | |
| 3739 | |
| 3740 | /* arch-tag: edb43589-4e09-4544-b325-978b5b121dcf |
| 3741 | (do not change this comment) */ |