| 1 | /* Interfaces to system-dependent kernel and library entries. |
| 2 | Copyright (C) 1985-1988, 1993-1995, 1999-2014 Free Software |
| 3 | Foundation, Inc. |
| 4 | |
| 5 | This file is part of GNU Emacs. |
| 6 | |
| 7 | GNU Emacs is free software: you can redistribute it and/or modify |
| 8 | it under the terms of the GNU General Public License as published by |
| 9 | the Free Software Foundation, either version 3 of the License, or |
| 10 | (at your option) any later version. |
| 11 | |
| 12 | GNU Emacs is distributed in the hope that it will be useful, |
| 13 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 14 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 15 | GNU General Public License for more details. |
| 16 | |
| 17 | You should have received a copy of the GNU General Public License |
| 18 | along with GNU Emacs. If not, see <http://www.gnu.org/licenses/>. */ |
| 19 | |
| 20 | #include <config.h> |
| 21 | |
| 22 | #include <execinfo.h> |
| 23 | #include "sysstdio.h" |
| 24 | #ifdef HAVE_PWD_H |
| 25 | #include <pwd.h> |
| 26 | #include <grp.h> |
| 27 | #endif /* HAVE_PWD_H */ |
| 28 | #include <limits.h> |
| 29 | #include <unistd.h> |
| 30 | |
| 31 | #include <c-ctype.h> |
| 32 | #include <utimens.h> |
| 33 | |
| 34 | #include "lisp.h" |
| 35 | #include "sysselect.h" |
| 36 | #include "blockinput.h" |
| 37 | |
| 38 | #if defined DARWIN_OS || defined __FreeBSD__ |
| 39 | # include <sys/sysctl.h> |
| 40 | #endif |
| 41 | |
| 42 | #ifdef __FreeBSD__ |
| 43 | /* Sparc/ARM machine/frame.h has 'struct frame' which conflicts with Emacs's |
| 44 | 'struct frame', so rename it. */ |
| 45 | # define frame freebsd_frame |
| 46 | # include <sys/user.h> |
| 47 | # undef frame |
| 48 | |
| 49 | # include <sys/resource.h> |
| 50 | # include <math.h> |
| 51 | #endif |
| 52 | |
| 53 | #ifdef WINDOWSNT |
| 54 | #define read sys_read |
| 55 | #define write sys_write |
| 56 | #ifndef STDERR_FILENO |
| 57 | #define STDERR_FILENO fileno(GetStdHandle(STD_ERROR_HANDLE)) |
| 58 | #endif |
| 59 | #include <windows.h> |
| 60 | #endif /* not WINDOWSNT */ |
| 61 | |
| 62 | #include <sys/types.h> |
| 63 | #include <sys/stat.h> |
| 64 | #include <errno.h> |
| 65 | |
| 66 | /* Get SI_SRPC_DOMAIN, if it is available. */ |
| 67 | #ifdef HAVE_SYS_SYSTEMINFO_H |
| 68 | #include <sys/systeminfo.h> |
| 69 | #endif |
| 70 | |
| 71 | #ifdef MSDOS /* Demacs 1.1.2 91/10/20 Manabu Higashida, MW Aug 1993 */ |
| 72 | #include "msdos.h" |
| 73 | #endif |
| 74 | |
| 75 | #include <sys/param.h> |
| 76 | #include <sys/file.h> |
| 77 | #include <fcntl.h> |
| 78 | |
| 79 | #include "systty.h" |
| 80 | #include "syswait.h" |
| 81 | |
| 82 | #ifdef HAVE_SYS_UTSNAME_H |
| 83 | #include <sys/utsname.h> |
| 84 | #include <memory.h> |
| 85 | #endif /* HAVE_SYS_UTSNAME_H */ |
| 86 | |
| 87 | #include "keyboard.h" |
| 88 | #include "frame.h" |
| 89 | #include "window.h" |
| 90 | #include "termhooks.h" |
| 91 | #include "termchar.h" |
| 92 | #include "termopts.h" |
| 93 | #include "dispextern.h" |
| 94 | #include "process.h" |
| 95 | #include "cm.h" /* for reset_sys_modes */ |
| 96 | |
| 97 | #ifdef WINDOWSNT |
| 98 | #include <direct.h> |
| 99 | /* In process.h which conflicts with the local copy. */ |
| 100 | #define _P_WAIT 0 |
| 101 | int _cdecl _spawnlp (int, const char *, const char *, ...); |
| 102 | int _cdecl _getpid (void); |
| 103 | #endif |
| 104 | |
| 105 | #include "syssignal.h" |
| 106 | #include "systime.h" |
| 107 | |
| 108 | static void emacs_get_tty (int, struct emacs_tty *); |
| 109 | static int emacs_set_tty (int, struct emacs_tty *, bool); |
| 110 | |
| 111 | /* ULLONG_MAX is missing on Red Hat Linux 7.3; see Bug#11781. */ |
| 112 | #ifndef ULLONG_MAX |
| 113 | #define ULLONG_MAX TYPE_MAXIMUM (unsigned long long int) |
| 114 | #endif |
| 115 | |
| 116 | /* Declare here, including term.h is problematic on some systems. */ |
| 117 | extern void tputs (const char *, int, int (*)(int)); |
| 118 | |
| 119 | static const int baud_convert[] = |
| 120 | { |
| 121 | 0, 50, 75, 110, 135, 150, 200, 300, 600, 1200, |
| 122 | 1800, 2400, 4800, 9600, 19200, 38400 |
| 123 | }; |
| 124 | |
| 125 | |
| 126 | #if !defined (HAVE_GET_CURRENT_DIR_NAME) || defined (BROKEN_GET_CURRENT_DIR_NAME) |
| 127 | |
| 128 | /* Return the current working directory. Returns NULL on errors. |
| 129 | Any other returned value must be freed with free. This is used |
| 130 | only when get_current_dir_name is not defined on the system. */ |
| 131 | char * |
| 132 | get_current_dir_name (void) |
| 133 | { |
| 134 | char *buf; |
| 135 | char *pwd = getenv ("PWD"); |
| 136 | struct stat dotstat, pwdstat; |
| 137 | /* If PWD is accurate, use it instead of calling getcwd. PWD is |
| 138 | sometimes a nicer name, and using it may avoid a fatal error if a |
| 139 | parent directory is searchable but not readable. */ |
| 140 | if (pwd |
| 141 | && (IS_DIRECTORY_SEP (*pwd) || (*pwd && IS_DEVICE_SEP (pwd[1]))) |
| 142 | && stat (pwd, &pwdstat) == 0 |
| 143 | && stat (".", &dotstat) == 0 |
| 144 | && dotstat.st_ino == pwdstat.st_ino |
| 145 | && dotstat.st_dev == pwdstat.st_dev |
| 146 | #ifdef MAXPATHLEN |
| 147 | && strlen (pwd) < MAXPATHLEN |
| 148 | #endif |
| 149 | ) |
| 150 | { |
| 151 | buf = malloc (strlen (pwd) + 1); |
| 152 | if (!buf) |
| 153 | return NULL; |
| 154 | strcpy (buf, pwd); |
| 155 | } |
| 156 | else |
| 157 | { |
| 158 | size_t buf_size = 1024; |
| 159 | buf = malloc (buf_size); |
| 160 | if (!buf) |
| 161 | return NULL; |
| 162 | for (;;) |
| 163 | { |
| 164 | if (getcwd (buf, buf_size) == buf) |
| 165 | break; |
| 166 | if (errno != ERANGE) |
| 167 | { |
| 168 | int tmp_errno = errno; |
| 169 | free (buf); |
| 170 | errno = tmp_errno; |
| 171 | return NULL; |
| 172 | } |
| 173 | buf_size *= 2; |
| 174 | buf = realloc (buf, buf_size); |
| 175 | if (!buf) |
| 176 | return NULL; |
| 177 | } |
| 178 | } |
| 179 | return buf; |
| 180 | } |
| 181 | #endif |
| 182 | |
| 183 | \f |
| 184 | /* Discard pending input on all input descriptors. */ |
| 185 | |
| 186 | void |
| 187 | discard_tty_input (void) |
| 188 | { |
| 189 | #ifndef WINDOWSNT |
| 190 | struct emacs_tty buf; |
| 191 | |
| 192 | if (noninteractive) |
| 193 | return; |
| 194 | |
| 195 | #ifdef MSDOS /* Demacs 1.1.1 91/10/16 HIRANO Satoshi */ |
| 196 | while (dos_keyread () != -1) |
| 197 | ; |
| 198 | #else /* not MSDOS */ |
| 199 | { |
| 200 | struct tty_display_info *tty; |
| 201 | for (tty = tty_list; tty; tty = tty->next) |
| 202 | { |
| 203 | if (tty->input) /* Is the device suspended? */ |
| 204 | { |
| 205 | emacs_get_tty (fileno (tty->input), &buf); |
| 206 | emacs_set_tty (fileno (tty->input), &buf, 0); |
| 207 | } |
| 208 | } |
| 209 | } |
| 210 | #endif /* not MSDOS */ |
| 211 | #endif /* not WINDOWSNT */ |
| 212 | } |
| 213 | |
| 214 | \f |
| 215 | #ifdef SIGTSTP |
| 216 | |
| 217 | /* Arrange for character C to be read as the next input from |
| 218 | the terminal. |
| 219 | XXX What if we have multiple ttys? |
| 220 | */ |
| 221 | |
| 222 | void |
| 223 | stuff_char (char c) |
| 224 | { |
| 225 | if (! (FRAMEP (selected_frame) |
| 226 | && FRAME_LIVE_P (XFRAME (selected_frame)) |
| 227 | && FRAME_TERMCAP_P (XFRAME (selected_frame)))) |
| 228 | return; |
| 229 | |
| 230 | /* Should perhaps error if in batch mode */ |
| 231 | #ifdef TIOCSTI |
| 232 | ioctl (fileno (CURTTY()->input), TIOCSTI, &c); |
| 233 | #else /* no TIOCSTI */ |
| 234 | error ("Cannot stuff terminal input characters in this version of Unix"); |
| 235 | #endif /* no TIOCSTI */ |
| 236 | } |
| 237 | |
| 238 | #endif /* SIGTSTP */ |
| 239 | \f |
| 240 | void |
| 241 | init_baud_rate (int fd) |
| 242 | { |
| 243 | int emacs_ospeed; |
| 244 | |
| 245 | if (noninteractive) |
| 246 | emacs_ospeed = 0; |
| 247 | else |
| 248 | { |
| 249 | #ifdef DOS_NT |
| 250 | emacs_ospeed = 15; |
| 251 | #else /* not DOS_NT */ |
| 252 | struct termios sg; |
| 253 | |
| 254 | sg.c_cflag = B9600; |
| 255 | tcgetattr (fd, &sg); |
| 256 | emacs_ospeed = cfgetospeed (&sg); |
| 257 | #endif /* not DOS_NT */ |
| 258 | } |
| 259 | |
| 260 | baud_rate = (emacs_ospeed < ARRAYELTS (baud_convert) |
| 261 | ? baud_convert[emacs_ospeed] : 9600); |
| 262 | if (baud_rate == 0) |
| 263 | baud_rate = 1200; |
| 264 | } |
| 265 | |
| 266 | \f |
| 267 | |
| 268 | #ifndef MSDOS |
| 269 | |
| 270 | /* Wait for the subprocess with process id CHILD to terminate or change status. |
| 271 | CHILD must be a child process that has not been reaped. |
| 272 | If STATUS is non-null, store the waitpid-style exit status into *STATUS |
| 273 | and tell wait_reading_process_output that it needs to look around. |
| 274 | Use waitpid-style OPTIONS when waiting. |
| 275 | If INTERRUPTIBLE, this function is interruptible by a signal. |
| 276 | |
| 277 | Return CHILD if successful, 0 if no status is available; |
| 278 | the latter is possible only when options & NOHANG. */ |
| 279 | static pid_t |
| 280 | get_child_status (pid_t child, int *status, int options, bool interruptible) |
| 281 | { |
| 282 | pid_t pid; |
| 283 | |
| 284 | /* Invoke waitpid only with a known process ID; do not invoke |
| 285 | waitpid with a nonpositive argument. Otherwise, Emacs might |
| 286 | reap an unwanted process by mistake. For example, invoking |
| 287 | waitpid (-1, ...) can mess up glib by reaping glib's subprocesses, |
| 288 | so that another thread running glib won't find them. */ |
| 289 | eassert (child > 0); |
| 290 | |
| 291 | while ((pid = waitpid (child, status, options)) < 0) |
| 292 | { |
| 293 | /* Check that CHILD is a child process that has not been reaped, |
| 294 | and that STATUS and OPTIONS are valid. Otherwise abort, |
| 295 | as continuing after this internal error could cause Emacs to |
| 296 | become confused and kill innocent-victim processes. */ |
| 297 | if (errno != EINTR) |
| 298 | emacs_abort (); |
| 299 | |
| 300 | /* Note: the MS-Windows emulation of waitpid calls QUIT |
| 301 | internally. */ |
| 302 | if (interruptible) |
| 303 | QUIT; |
| 304 | } |
| 305 | |
| 306 | /* If successful and status is requested, tell wait_reading_process_output |
| 307 | that it needs to wake up and look around. */ |
| 308 | if (pid && status && input_available_clear_time) |
| 309 | *input_available_clear_time = make_timespec (0, 0); |
| 310 | |
| 311 | return pid; |
| 312 | } |
| 313 | |
| 314 | /* Wait for the subprocess with process id CHILD to terminate. |
| 315 | CHILD must be a child process that has not been reaped. |
| 316 | If STATUS is non-null, store the waitpid-style exit status into *STATUS |
| 317 | and tell wait_reading_process_output that it needs to look around. |
| 318 | If INTERRUPTIBLE, this function is interruptible by a signal. */ |
| 319 | void |
| 320 | wait_for_termination (pid_t child, int *status, bool interruptible) |
| 321 | { |
| 322 | get_child_status (child, status, 0, interruptible); |
| 323 | } |
| 324 | |
| 325 | /* Report whether the subprocess with process id CHILD has changed status. |
| 326 | Termination counts as a change of status. |
| 327 | CHILD must be a child process that has not been reaped. |
| 328 | If STATUS is non-null, store the waitpid-style exit status into *STATUS |
| 329 | and tell wait_reading_process_output that it needs to look around. |
| 330 | Use waitpid-style OPTIONS to check status, but do not wait. |
| 331 | |
| 332 | Return CHILD if successful, 0 if no status is available because |
| 333 | the process's state has not changed. */ |
| 334 | pid_t |
| 335 | child_status_changed (pid_t child, int *status, int options) |
| 336 | { |
| 337 | return get_child_status (child, status, WNOHANG | options, 0); |
| 338 | } |
| 339 | |
| 340 | \f |
| 341 | /* Set up the terminal at the other end of a pseudo-terminal that |
| 342 | we will be controlling an inferior through. |
| 343 | It should not echo or do line-editing, since that is done |
| 344 | in Emacs. No padding needed for insertion into an Emacs buffer. */ |
| 345 | |
| 346 | void |
| 347 | child_setup_tty (int out) |
| 348 | { |
| 349 | #ifndef WINDOWSNT |
| 350 | struct emacs_tty s; |
| 351 | |
| 352 | emacs_get_tty (out, &s); |
| 353 | s.main.c_oflag |= OPOST; /* Enable output postprocessing */ |
| 354 | s.main.c_oflag &= ~ONLCR; /* Disable map of NL to CR-NL on output */ |
| 355 | #ifdef NLDLY |
| 356 | /* http://lists.gnu.org/archive/html/emacs-devel/2008-05/msg00406.html |
| 357 | Some versions of GNU Hurd do not have FFDLY? */ |
| 358 | #ifdef FFDLY |
| 359 | s.main.c_oflag &= ~(NLDLY|CRDLY|TABDLY|BSDLY|VTDLY|FFDLY); |
| 360 | /* No output delays */ |
| 361 | #else |
| 362 | s.main.c_oflag &= ~(NLDLY|CRDLY|TABDLY|BSDLY|VTDLY); |
| 363 | /* No output delays */ |
| 364 | #endif |
| 365 | #endif |
| 366 | s.main.c_lflag &= ~ECHO; /* Disable echo */ |
| 367 | s.main.c_lflag |= ISIG; /* Enable signals */ |
| 368 | #ifdef IUCLC |
| 369 | s.main.c_iflag &= ~IUCLC; /* Disable downcasing on input. */ |
| 370 | #endif |
| 371 | #ifdef ISTRIP |
| 372 | s.main.c_iflag &= ~ISTRIP; /* don't strip 8th bit on input */ |
| 373 | #endif |
| 374 | #ifdef OLCUC |
| 375 | s.main.c_oflag &= ~OLCUC; /* Disable upcasing on output. */ |
| 376 | #endif |
| 377 | s.main.c_oflag &= ~TAB3; /* Disable tab expansion */ |
| 378 | s.main.c_cflag = (s.main.c_cflag & ~CSIZE) | CS8; /* Don't strip 8th bit */ |
| 379 | s.main.c_cc[VERASE] = CDISABLE; /* disable erase processing */ |
| 380 | s.main.c_cc[VKILL] = CDISABLE; /* disable kill processing */ |
| 381 | |
| 382 | #ifdef HPUX |
| 383 | s.main.c_cflag = (s.main.c_cflag & ~CBAUD) | B9600; /* baud rate sanity */ |
| 384 | #endif /* HPUX */ |
| 385 | |
| 386 | #ifdef SIGNALS_VIA_CHARACTERS |
| 387 | /* the QUIT and INTR character are used in process_send_signal |
| 388 | so set them here to something useful. */ |
| 389 | if (s.main.c_cc[VQUIT] == CDISABLE) |
| 390 | s.main.c_cc[VQUIT] = '\\'&037; /* Control-\ */ |
| 391 | if (s.main.c_cc[VINTR] == CDISABLE) |
| 392 | s.main.c_cc[VINTR] = 'C'&037; /* Control-C */ |
| 393 | #endif /* not SIGNALS_VIA_CHARACTERS */ |
| 394 | |
| 395 | #ifdef AIX |
| 396 | /* Also, PTY overloads NUL and BREAK. |
| 397 | don't ignore break, but don't signal either, so it looks like NUL. */ |
| 398 | s.main.c_iflag &= ~IGNBRK; |
| 399 | s.main.c_iflag &= ~BRKINT; |
| 400 | /* rms: Formerly it set s.main.c_cc[VINTR] to 0377 here |
| 401 | unconditionally. Then a SIGNALS_VIA_CHARACTERS conditional |
| 402 | would force it to 0377. That looks like duplicated code. */ |
| 403 | s.main.c_cflag = (s.main.c_cflag & ~CBAUD) | B9600; /* baud rate sanity */ |
| 404 | #endif /* AIX */ |
| 405 | |
| 406 | /* We originally enabled ICANON (and set VEOF to 04), and then had |
| 407 | process.c send additional EOF chars to flush the output when faced |
| 408 | with long lines, but this leads to weird effects when the |
| 409 | subprocess has disabled ICANON and ends up seeing those spurious |
| 410 | extra EOFs. So we don't send EOFs any more in |
| 411 | process.c:send_process. First we tried to disable ICANON by |
| 412 | default, so if a subsprocess sets up ICANON, it's his problem (or |
| 413 | the Elisp package that talks to it) to deal with lines that are |
| 414 | too long. But this disables some features, such as the ability |
| 415 | to send EOF signals. So we re-enabled ICANON but there is no |
| 416 | more "send eof to flush" going on (which is wrong and unportable |
| 417 | in itself). The correct way to handle too much output is to |
| 418 | buffer what could not be written and then write it again when |
| 419 | select returns ok for writing. This has it own set of |
| 420 | problems. Write is now asynchronous, is that a problem? How much |
| 421 | do we buffer, and what do we do when that limit is reached? */ |
| 422 | |
| 423 | s.main.c_lflag |= ICANON; /* Enable line editing and eof processing */ |
| 424 | s.main.c_cc[VEOF] = 'D'&037; /* Control-D */ |
| 425 | #if 0 /* These settings only apply to non-ICANON mode. */ |
| 426 | s.main.c_cc[VMIN] = 1; |
| 427 | s.main.c_cc[VTIME] = 0; |
| 428 | #endif |
| 429 | |
| 430 | emacs_set_tty (out, &s, 0); |
| 431 | #endif /* not WINDOWSNT */ |
| 432 | } |
| 433 | #endif /* not MSDOS */ |
| 434 | |
| 435 | \f |
| 436 | /* Record a signal code and the action for it. */ |
| 437 | struct save_signal |
| 438 | { |
| 439 | int code; |
| 440 | struct sigaction action; |
| 441 | }; |
| 442 | |
| 443 | static void save_signal_handlers (struct save_signal *); |
| 444 | static void restore_signal_handlers (struct save_signal *); |
| 445 | |
| 446 | /* Suspend the Emacs process; give terminal to its superior. */ |
| 447 | |
| 448 | void |
| 449 | sys_suspend (void) |
| 450 | { |
| 451 | #ifndef DOS_NT |
| 452 | kill (0, SIGTSTP); |
| 453 | #else |
| 454 | /* On a system where suspending is not implemented, |
| 455 | instead fork a subshell and let it talk directly to the terminal |
| 456 | while we wait. */ |
| 457 | sys_subshell (); |
| 458 | |
| 459 | #endif |
| 460 | } |
| 461 | |
| 462 | /* Fork a subshell. */ |
| 463 | |
| 464 | void |
| 465 | sys_subshell (void) |
| 466 | { |
| 467 | #ifdef DOS_NT /* Demacs 1.1.2 91/10/20 Manabu Higashida */ |
| 468 | int st; |
| 469 | #ifdef MSDOS |
| 470 | char oldwd[MAXPATHLEN+1]; /* Fixed length is safe on MSDOS. */ |
| 471 | #else |
| 472 | char oldwd[MAX_UTF8_PATH]; |
| 473 | #endif |
| 474 | #endif |
| 475 | pid_t pid; |
| 476 | int status; |
| 477 | struct save_signal saved_handlers[5]; |
| 478 | char *str = SSDATA (encode_current_directory ()); |
| 479 | |
| 480 | #ifdef DOS_NT |
| 481 | pid = 0; |
| 482 | #else |
| 483 | { |
| 484 | char *volatile str_volatile = str; |
| 485 | pid = vfork (); |
| 486 | str = str_volatile; |
| 487 | } |
| 488 | #endif |
| 489 | |
| 490 | if (pid < 0) |
| 491 | error ("Can't spawn subshell"); |
| 492 | |
| 493 | saved_handlers[0].code = SIGINT; |
| 494 | saved_handlers[1].code = SIGQUIT; |
| 495 | saved_handlers[2].code = SIGTERM; |
| 496 | #ifdef USABLE_SIGIO |
| 497 | saved_handlers[3].code = SIGIO; |
| 498 | saved_handlers[4].code = 0; |
| 499 | #else |
| 500 | saved_handlers[3].code = 0; |
| 501 | #endif |
| 502 | |
| 503 | #ifdef DOS_NT |
| 504 | save_signal_handlers (saved_handlers); |
| 505 | #endif |
| 506 | |
| 507 | if (pid == 0) |
| 508 | { |
| 509 | const char *sh = 0; |
| 510 | |
| 511 | #ifdef DOS_NT /* MW, Aug 1993 */ |
| 512 | getcwd (oldwd, sizeof oldwd); |
| 513 | if (sh == 0) |
| 514 | sh = egetenv ("SUSPEND"); /* KFS, 1994-12-14 */ |
| 515 | #endif |
| 516 | if (sh == 0) |
| 517 | sh = egetenv ("SHELL"); |
| 518 | if (sh == 0) |
| 519 | sh = "sh"; |
| 520 | |
| 521 | /* Use our buffer's default directory for the subshell. */ |
| 522 | if (chdir (str) != 0) |
| 523 | { |
| 524 | #ifndef DOS_NT |
| 525 | emacs_perror (str); |
| 526 | _exit (EXIT_CANCELED); |
| 527 | #endif |
| 528 | } |
| 529 | |
| 530 | #ifdef MSDOS /* Demacs 1.1.2 91/10/20 Manabu Higashida */ |
| 531 | { |
| 532 | char *epwd = getenv ("PWD"); |
| 533 | char old_pwd[MAXPATHLEN+1+4]; |
| 534 | |
| 535 | /* If PWD is set, pass it with corrected value. */ |
| 536 | if (epwd) |
| 537 | { |
| 538 | strcpy (old_pwd, epwd); |
| 539 | setenv ("PWD", str, 1); |
| 540 | } |
| 541 | st = system (sh); |
| 542 | chdir (oldwd); /* FIXME: Do the right thing on chdir failure. */ |
| 543 | if (epwd) |
| 544 | putenv (old_pwd); /* restore previous value */ |
| 545 | } |
| 546 | #else /* not MSDOS */ |
| 547 | #ifdef WINDOWSNT |
| 548 | /* Waits for process completion */ |
| 549 | pid = _spawnlp (_P_WAIT, sh, sh, NULL); |
| 550 | chdir (oldwd); /* FIXME: Do the right thing on chdir failure. */ |
| 551 | if (pid == -1) |
| 552 | write (1, "Can't execute subshell", 22); |
| 553 | #else /* not WINDOWSNT */ |
| 554 | execlp (sh, sh, (char *) 0); |
| 555 | emacs_perror (sh); |
| 556 | _exit (errno == ENOENT ? EXIT_ENOENT : EXIT_CANNOT_INVOKE); |
| 557 | #endif /* not WINDOWSNT */ |
| 558 | #endif /* not MSDOS */ |
| 559 | } |
| 560 | |
| 561 | /* Do this now if we did not do it before. */ |
| 562 | #ifndef MSDOS |
| 563 | save_signal_handlers (saved_handlers); |
| 564 | #endif |
| 565 | |
| 566 | #ifndef DOS_NT |
| 567 | wait_for_termination (pid, &status, 0); |
| 568 | #endif |
| 569 | restore_signal_handlers (saved_handlers); |
| 570 | } |
| 571 | |
| 572 | static void |
| 573 | save_signal_handlers (struct save_signal *saved_handlers) |
| 574 | { |
| 575 | while (saved_handlers->code) |
| 576 | { |
| 577 | struct sigaction action; |
| 578 | emacs_sigaction_init (&action, SIG_IGN); |
| 579 | sigaction (saved_handlers->code, &action, &saved_handlers->action); |
| 580 | saved_handlers++; |
| 581 | } |
| 582 | } |
| 583 | |
| 584 | static void |
| 585 | restore_signal_handlers (struct save_signal *saved_handlers) |
| 586 | { |
| 587 | while (saved_handlers->code) |
| 588 | { |
| 589 | sigaction (saved_handlers->code, &saved_handlers->action, 0); |
| 590 | saved_handlers++; |
| 591 | } |
| 592 | } |
| 593 | \f |
| 594 | #ifdef USABLE_SIGIO |
| 595 | static int old_fcntl_flags[FD_SETSIZE]; |
| 596 | #endif |
| 597 | |
| 598 | void |
| 599 | init_sigio (int fd) |
| 600 | { |
| 601 | #ifdef USABLE_SIGIO |
| 602 | old_fcntl_flags[fd] = fcntl (fd, F_GETFL, 0) & ~FASYNC; |
| 603 | fcntl (fd, F_SETFL, old_fcntl_flags[fd] | FASYNC); |
| 604 | interrupts_deferred = 0; |
| 605 | #endif |
| 606 | } |
| 607 | |
| 608 | #ifndef DOS_NT |
| 609 | static void |
| 610 | reset_sigio (int fd) |
| 611 | { |
| 612 | #ifdef USABLE_SIGIO |
| 613 | fcntl (fd, F_SETFL, old_fcntl_flags[fd]); |
| 614 | #endif |
| 615 | } |
| 616 | #endif |
| 617 | |
| 618 | void |
| 619 | ignore_sigio (void) |
| 620 | { |
| 621 | #ifdef USABLE_SIGIO |
| 622 | signal (SIGIO, SIG_IGN); |
| 623 | #endif |
| 624 | } |
| 625 | \f |
| 626 | #ifndef MSDOS |
| 627 | /* Block SIGCHLD. */ |
| 628 | |
| 629 | void |
| 630 | block_child_signal (sigset_t *oldset) |
| 631 | { |
| 632 | sigset_t blocked; |
| 633 | sigemptyset (&blocked); |
| 634 | sigaddset (&blocked, SIGCHLD); |
| 635 | sigaddset (&blocked, SIGINT); |
| 636 | pthread_sigmask (SIG_BLOCK, &blocked, oldset); |
| 637 | } |
| 638 | |
| 639 | /* Unblock SIGCHLD. */ |
| 640 | |
| 641 | void |
| 642 | unblock_child_signal (sigset_t const *oldset) |
| 643 | { |
| 644 | pthread_sigmask (SIG_SETMASK, oldset, 0); |
| 645 | } |
| 646 | |
| 647 | #endif /* !MSDOS */ |
| 648 | \f |
| 649 | /* Saving and restoring the process group of Emacs's terminal. */ |
| 650 | |
| 651 | /* The process group of which Emacs was a member when it initially |
| 652 | started. |
| 653 | |
| 654 | If Emacs was in its own process group (i.e. inherited_pgroup == |
| 655 | getpid ()), then we know we're running under a shell with job |
| 656 | control (Emacs would never be run as part of a pipeline). |
| 657 | Everything is fine. |
| 658 | |
| 659 | If Emacs was not in its own process group, then we know we're |
| 660 | running under a shell (or a caller) that doesn't know how to |
| 661 | separate itself from Emacs (like sh). Emacs must be in its own |
| 662 | process group in order to receive SIGIO correctly. In this |
| 663 | situation, we put ourselves in our own pgroup, forcibly set the |
| 664 | tty's pgroup to our pgroup, and make sure to restore and reinstate |
| 665 | the tty's pgroup just like any other terminal setting. If |
| 666 | inherited_group was not the tty's pgroup, then we'll get a |
| 667 | SIGTTmumble when we try to change the tty's pgroup, and a CONT if |
| 668 | it goes foreground in the future, which is what should happen. */ |
| 669 | |
| 670 | static pid_t inherited_pgroup; |
| 671 | |
| 672 | void |
| 673 | init_foreground_group (void) |
| 674 | { |
| 675 | pid_t pgrp = getpgrp (); |
| 676 | inherited_pgroup = getpid () == pgrp ? 0 : pgrp; |
| 677 | } |
| 678 | |
| 679 | /* Block and unblock SIGTTOU. */ |
| 680 | |
| 681 | void |
| 682 | block_tty_out_signal (sigset_t *oldset) |
| 683 | { |
| 684 | #ifdef SIGTTOU |
| 685 | sigset_t blocked; |
| 686 | sigemptyset (&blocked); |
| 687 | sigaddset (&blocked, SIGTTOU); |
| 688 | pthread_sigmask (SIG_BLOCK, &blocked, oldset); |
| 689 | #endif |
| 690 | } |
| 691 | |
| 692 | void |
| 693 | unblock_tty_out_signal (sigset_t const *oldset) |
| 694 | { |
| 695 | #ifdef SIGTTOU |
| 696 | pthread_sigmask (SIG_SETMASK, oldset, 0); |
| 697 | #endif |
| 698 | } |
| 699 | |
| 700 | /* Safely set a controlling terminal FD's process group to PGID. |
| 701 | If we are not in the foreground already, POSIX requires tcsetpgrp |
| 702 | to deliver a SIGTTOU signal, which would stop us. This is an |
| 703 | annoyance, so temporarily ignore the signal. |
| 704 | |
| 705 | In practice, platforms lacking SIGTTOU also lack tcsetpgrp, so |
| 706 | skip all this unless SIGTTOU is defined. */ |
| 707 | static void |
| 708 | tcsetpgrp_without_stopping (int fd, pid_t pgid) |
| 709 | { |
| 710 | #ifdef SIGTTOU |
| 711 | sigset_t oldset; |
| 712 | block_input (); |
| 713 | block_tty_out_signal (&oldset); |
| 714 | tcsetpgrp (fd, pgid); |
| 715 | unblock_tty_out_signal (&oldset); |
| 716 | unblock_input (); |
| 717 | #endif |
| 718 | } |
| 719 | |
| 720 | /* Split off the foreground process group to Emacs alone. When we are |
| 721 | in the foreground, but not started in our own process group, |
| 722 | redirect the tty device handle FD to point to our own process |
| 723 | group. FD must be the file descriptor of the controlling tty. */ |
| 724 | static void |
| 725 | narrow_foreground_group (int fd) |
| 726 | { |
| 727 | if (inherited_pgroup && setpgid (0, 0) == 0) |
| 728 | tcsetpgrp_without_stopping (fd, getpid ()); |
| 729 | } |
| 730 | |
| 731 | /* Set the tty to our original foreground group. */ |
| 732 | static void |
| 733 | widen_foreground_group (int fd) |
| 734 | { |
| 735 | if (inherited_pgroup && setpgid (0, inherited_pgroup) == 0) |
| 736 | tcsetpgrp_without_stopping (fd, inherited_pgroup); |
| 737 | } |
| 738 | \f |
| 739 | /* Getting and setting emacs_tty structures. */ |
| 740 | |
| 741 | /* Set *TC to the parameters associated with the terminal FD, |
| 742 | or clear it if the parameters are not available. */ |
| 743 | static void |
| 744 | emacs_get_tty (int fd, struct emacs_tty *settings) |
| 745 | { |
| 746 | /* Retrieve the primary parameters - baud rate, character size, etcetera. */ |
| 747 | #ifndef DOS_NT |
| 748 | /* We have those nifty POSIX tcmumbleattr functions. */ |
| 749 | memset (&settings->main, 0, sizeof (settings->main)); |
| 750 | tcgetattr (fd, &settings->main); |
| 751 | #endif |
| 752 | } |
| 753 | |
| 754 | |
| 755 | /* Set the parameters of the tty on FD according to the contents of |
| 756 | *SETTINGS. If FLUSHP, discard input. |
| 757 | Return 0 if all went well, and -1 (setting errno) if anything failed. */ |
| 758 | |
| 759 | static int |
| 760 | emacs_set_tty (int fd, struct emacs_tty *settings, bool flushp) |
| 761 | { |
| 762 | /* Set the primary parameters - baud rate, character size, etcetera. */ |
| 763 | #ifndef DOS_NT |
| 764 | int i; |
| 765 | /* We have those nifty POSIX tcmumbleattr functions. |
| 766 | William J. Smith <wjs@wiis.wang.com> writes: |
| 767 | "POSIX 1003.1 defines tcsetattr to return success if it was |
| 768 | able to perform any of the requested actions, even if some |
| 769 | of the requested actions could not be performed. |
| 770 | We must read settings back to ensure tty setup properly. |
| 771 | AIX requires this to keep tty from hanging occasionally." */ |
| 772 | /* This make sure that we don't loop indefinitely in here. */ |
| 773 | for (i = 0 ; i < 10 ; i++) |
| 774 | if (tcsetattr (fd, flushp ? TCSAFLUSH : TCSADRAIN, &settings->main) < 0) |
| 775 | { |
| 776 | if (errno == EINTR) |
| 777 | continue; |
| 778 | else |
| 779 | return -1; |
| 780 | } |
| 781 | else |
| 782 | { |
| 783 | struct termios new; |
| 784 | |
| 785 | memset (&new, 0, sizeof (new)); |
| 786 | /* Get the current settings, and see if they're what we asked for. */ |
| 787 | tcgetattr (fd, &new); |
| 788 | /* We cannot use memcmp on the whole structure here because under |
| 789 | * aix386 the termios structure has some reserved field that may |
| 790 | * not be filled in. |
| 791 | */ |
| 792 | if ( new.c_iflag == settings->main.c_iflag |
| 793 | && new.c_oflag == settings->main.c_oflag |
| 794 | && new.c_cflag == settings->main.c_cflag |
| 795 | && new.c_lflag == settings->main.c_lflag |
| 796 | && memcmp (new.c_cc, settings->main.c_cc, NCCS) == 0) |
| 797 | break; |
| 798 | else |
| 799 | continue; |
| 800 | } |
| 801 | #endif |
| 802 | |
| 803 | /* We have survived the tempest. */ |
| 804 | return 0; |
| 805 | } |
| 806 | |
| 807 | \f |
| 808 | |
| 809 | #ifdef F_SETOWN |
| 810 | static int old_fcntl_owner[FD_SETSIZE]; |
| 811 | #endif /* F_SETOWN */ |
| 812 | |
| 813 | /* This may also be defined in stdio, |
| 814 | but if so, this does no harm, |
| 815 | and using the same name avoids wasting the other one's space. */ |
| 816 | |
| 817 | #if defined (USG) |
| 818 | unsigned char _sobuf[BUFSIZ+8]; |
| 819 | #else |
| 820 | char _sobuf[BUFSIZ]; |
| 821 | #endif |
| 822 | |
| 823 | /* Initialize the terminal mode on all tty devices that are currently |
| 824 | open. */ |
| 825 | |
| 826 | void |
| 827 | init_all_sys_modes (void) |
| 828 | { |
| 829 | struct tty_display_info *tty; |
| 830 | for (tty = tty_list; tty; tty = tty->next) |
| 831 | init_sys_modes (tty); |
| 832 | } |
| 833 | |
| 834 | /* Initialize the terminal mode on the given tty device. */ |
| 835 | |
| 836 | void |
| 837 | init_sys_modes (struct tty_display_info *tty_out) |
| 838 | { |
| 839 | struct emacs_tty tty; |
| 840 | Lisp_Object terminal; |
| 841 | |
| 842 | Vtty_erase_char = Qnil; |
| 843 | |
| 844 | if (noninteractive) |
| 845 | return; |
| 846 | |
| 847 | if (!tty_out->output) |
| 848 | return; /* The tty is suspended. */ |
| 849 | |
| 850 | narrow_foreground_group (fileno (tty_out->input)); |
| 851 | |
| 852 | if (! tty_out->old_tty) |
| 853 | tty_out->old_tty = xmalloc (sizeof *tty_out->old_tty); |
| 854 | |
| 855 | emacs_get_tty (fileno (tty_out->input), tty_out->old_tty); |
| 856 | |
| 857 | tty = *tty_out->old_tty; |
| 858 | |
| 859 | #if !defined (DOS_NT) |
| 860 | XSETINT (Vtty_erase_char, tty.main.c_cc[VERASE]); |
| 861 | |
| 862 | tty.main.c_iflag |= (IGNBRK); /* Ignore break condition */ |
| 863 | tty.main.c_iflag &= ~ICRNL; /* Disable map of CR to NL on input */ |
| 864 | #ifdef INLCR /* I'm just being cautious, |
| 865 | since I can't check how widespread INLCR is--rms. */ |
| 866 | tty.main.c_iflag &= ~INLCR; /* Disable map of NL to CR on input */ |
| 867 | #endif |
| 868 | #ifdef ISTRIP |
| 869 | tty.main.c_iflag &= ~ISTRIP; /* don't strip 8th bit on input */ |
| 870 | #endif |
| 871 | tty.main.c_lflag &= ~ECHO; /* Disable echo */ |
| 872 | tty.main.c_lflag &= ~ICANON; /* Disable erase/kill processing */ |
| 873 | #ifdef IEXTEN |
| 874 | tty.main.c_lflag &= ~IEXTEN; /* Disable other editing characters. */ |
| 875 | #endif |
| 876 | tty.main.c_lflag |= ISIG; /* Enable signals */ |
| 877 | if (tty_out->flow_control) |
| 878 | { |
| 879 | tty.main.c_iflag |= IXON; /* Enable start/stop output control */ |
| 880 | #ifdef IXANY |
| 881 | tty.main.c_iflag &= ~IXANY; |
| 882 | #endif /* IXANY */ |
| 883 | } |
| 884 | else |
| 885 | tty.main.c_iflag &= ~IXON; /* Disable start/stop output control */ |
| 886 | tty.main.c_oflag &= ~ONLCR; /* Disable map of NL to CR-NL |
| 887 | on output */ |
| 888 | tty.main.c_oflag &= ~TAB3; /* Disable tab expansion */ |
| 889 | #ifdef CS8 |
| 890 | if (tty_out->meta_key) |
| 891 | { |
| 892 | tty.main.c_cflag |= CS8; /* allow 8th bit on input */ |
| 893 | tty.main.c_cflag &= ~PARENB;/* Don't check parity */ |
| 894 | } |
| 895 | #endif |
| 896 | |
| 897 | XSETTERMINAL(terminal, tty_out->terminal); |
| 898 | if (!NILP (Fcontrolling_tty_p (terminal))) |
| 899 | { |
| 900 | tty.main.c_cc[VINTR] = quit_char; /* C-g (usually) gives SIGINT */ |
| 901 | /* Set up C-g for both SIGQUIT and SIGINT. |
| 902 | We don't know which we will get, but we handle both alike |
| 903 | so which one it really gives us does not matter. */ |
| 904 | tty.main.c_cc[VQUIT] = quit_char; |
| 905 | } |
| 906 | else |
| 907 | { |
| 908 | /* We normally don't get interrupt or quit signals from tty |
| 909 | devices other than our controlling terminal; therefore, |
| 910 | we must handle C-g as normal input. Unfortunately, this |
| 911 | means that the interrupt and quit feature must be |
| 912 | disabled on secondary ttys, or we would not even see the |
| 913 | keypress. |
| 914 | |
| 915 | Note that even though emacsclient could have special code |
| 916 | to pass SIGINT to Emacs, we should _not_ enable |
| 917 | interrupt/quit keys for emacsclient frames. This means |
| 918 | that we can't break out of loops in C code from a |
| 919 | secondary tty frame, but we can always decide what |
| 920 | display the C-g came from, which is more important from a |
| 921 | usability point of view. (Consider the case when two |
| 922 | people work together using the same Emacs instance.) */ |
| 923 | tty.main.c_cc[VINTR] = CDISABLE; |
| 924 | tty.main.c_cc[VQUIT] = CDISABLE; |
| 925 | } |
| 926 | tty.main.c_cc[VMIN] = 1; /* Input should wait for at least 1 char */ |
| 927 | tty.main.c_cc[VTIME] = 0; /* no matter how long that takes. */ |
| 928 | #ifdef VSWTCH |
| 929 | tty.main.c_cc[VSWTCH] = CDISABLE; /* Turn off shell layering use |
| 930 | of C-z */ |
| 931 | #endif /* VSWTCH */ |
| 932 | |
| 933 | #ifdef VSUSP |
| 934 | tty.main.c_cc[VSUSP] = CDISABLE; /* Turn off handling of C-z. */ |
| 935 | #endif /* VSUSP */ |
| 936 | #ifdef V_DSUSP |
| 937 | tty.main.c_cc[V_DSUSP] = CDISABLE; /* Turn off handling of C-y. */ |
| 938 | #endif /* V_DSUSP */ |
| 939 | #ifdef VDSUSP /* Some systems have VDSUSP, some have V_DSUSP. */ |
| 940 | tty.main.c_cc[VDSUSP] = CDISABLE; |
| 941 | #endif /* VDSUSP */ |
| 942 | #ifdef VLNEXT |
| 943 | tty.main.c_cc[VLNEXT] = CDISABLE; |
| 944 | #endif /* VLNEXT */ |
| 945 | #ifdef VREPRINT |
| 946 | tty.main.c_cc[VREPRINT] = CDISABLE; |
| 947 | #endif /* VREPRINT */ |
| 948 | #ifdef VWERASE |
| 949 | tty.main.c_cc[VWERASE] = CDISABLE; |
| 950 | #endif /* VWERASE */ |
| 951 | #ifdef VDISCARD |
| 952 | tty.main.c_cc[VDISCARD] = CDISABLE; |
| 953 | #endif /* VDISCARD */ |
| 954 | |
| 955 | if (tty_out->flow_control) |
| 956 | { |
| 957 | #ifdef VSTART |
| 958 | tty.main.c_cc[VSTART] = '\021'; |
| 959 | #endif /* VSTART */ |
| 960 | #ifdef VSTOP |
| 961 | tty.main.c_cc[VSTOP] = '\023'; |
| 962 | #endif /* VSTOP */ |
| 963 | } |
| 964 | else |
| 965 | { |
| 966 | #ifdef VSTART |
| 967 | tty.main.c_cc[VSTART] = CDISABLE; |
| 968 | #endif /* VSTART */ |
| 969 | #ifdef VSTOP |
| 970 | tty.main.c_cc[VSTOP] = CDISABLE; |
| 971 | #endif /* VSTOP */ |
| 972 | } |
| 973 | |
| 974 | #ifdef AIX |
| 975 | tty.main.c_cc[VSTRT] = CDISABLE; |
| 976 | tty.main.c_cc[VSTOP] = CDISABLE; |
| 977 | tty.main.c_cc[VSUSP] = CDISABLE; |
| 978 | tty.main.c_cc[VDSUSP] = CDISABLE; |
| 979 | if (tty_out->flow_control) |
| 980 | { |
| 981 | #ifdef VSTART |
| 982 | tty.main.c_cc[VSTART] = '\021'; |
| 983 | #endif /* VSTART */ |
| 984 | #ifdef VSTOP |
| 985 | tty.main.c_cc[VSTOP] = '\023'; |
| 986 | #endif /* VSTOP */ |
| 987 | } |
| 988 | /* Also, PTY overloads NUL and BREAK. |
| 989 | don't ignore break, but don't signal either, so it looks like NUL. |
| 990 | This really serves a purpose only if running in an XTERM window |
| 991 | or via TELNET or the like, but does no harm elsewhere. */ |
| 992 | tty.main.c_iflag &= ~IGNBRK; |
| 993 | tty.main.c_iflag &= ~BRKINT; |
| 994 | #endif |
| 995 | #endif /* not DOS_NT */ |
| 996 | |
| 997 | #ifdef MSDOS /* Demacs 1.1.2 91/10/20 Manabu Higashida, MW Aug 1993 */ |
| 998 | if (!tty_out->term_initted) |
| 999 | internal_terminal_init (); |
| 1000 | dos_ttraw (tty_out); |
| 1001 | #endif |
| 1002 | |
| 1003 | emacs_set_tty (fileno (tty_out->input), &tty, 0); |
| 1004 | |
| 1005 | /* This code added to insure that, if flow-control is not to be used, |
| 1006 | we have an unlocked terminal at the start. */ |
| 1007 | |
| 1008 | #ifdef TCXONC |
| 1009 | if (!tty_out->flow_control) ioctl (fileno (tty_out->input), TCXONC, 1); |
| 1010 | #endif |
| 1011 | #ifdef TIOCSTART |
| 1012 | if (!tty_out->flow_control) ioctl (fileno (tty_out->input), TIOCSTART, 0); |
| 1013 | #endif |
| 1014 | |
| 1015 | #if !defined (DOS_NT) |
| 1016 | #ifdef TCOON |
| 1017 | if (!tty_out->flow_control) tcflow (fileno (tty_out->input), TCOON); |
| 1018 | #endif |
| 1019 | #endif |
| 1020 | |
| 1021 | #ifdef F_GETOWN |
| 1022 | if (interrupt_input) |
| 1023 | { |
| 1024 | old_fcntl_owner[fileno (tty_out->input)] = |
| 1025 | fcntl (fileno (tty_out->input), F_GETOWN, 0); |
| 1026 | fcntl (fileno (tty_out->input), F_SETOWN, getpid ()); |
| 1027 | init_sigio (fileno (tty_out->input)); |
| 1028 | #ifdef HAVE_GPM |
| 1029 | if (gpm_tty == tty_out) |
| 1030 | { |
| 1031 | /* Arrange for mouse events to give us SIGIO signals. */ |
| 1032 | fcntl (gpm_fd, F_SETOWN, getpid ()); |
| 1033 | fcntl (gpm_fd, F_SETFL, fcntl (gpm_fd, F_GETFL, 0) | O_NONBLOCK); |
| 1034 | init_sigio (gpm_fd); |
| 1035 | } |
| 1036 | #endif /* HAVE_GPM */ |
| 1037 | } |
| 1038 | #endif /* F_GETOWN */ |
| 1039 | |
| 1040 | #ifdef _IOFBF |
| 1041 | /* This symbol is defined on recent USG systems. |
| 1042 | Someone says without this call USG won't really buffer the file |
| 1043 | even with a call to setbuf. */ |
| 1044 | setvbuf (tty_out->output, (char *) _sobuf, _IOFBF, sizeof _sobuf); |
| 1045 | #else |
| 1046 | setbuf (tty_out->output, (char *) _sobuf); |
| 1047 | #endif |
| 1048 | |
| 1049 | if (tty_out->terminal->set_terminal_modes_hook) |
| 1050 | tty_out->terminal->set_terminal_modes_hook (tty_out->terminal); |
| 1051 | |
| 1052 | if (!tty_out->term_initted) |
| 1053 | { |
| 1054 | Lisp_Object tail, frame; |
| 1055 | FOR_EACH_FRAME (tail, frame) |
| 1056 | { |
| 1057 | /* XXX This needs to be revised. */ |
| 1058 | if (FRAME_TERMCAP_P (XFRAME (frame)) |
| 1059 | && FRAME_TTY (XFRAME (frame)) == tty_out) |
| 1060 | init_frame_faces (XFRAME (frame)); |
| 1061 | } |
| 1062 | } |
| 1063 | |
| 1064 | if (tty_out->term_initted && no_redraw_on_reenter) |
| 1065 | { |
| 1066 | /* We used to call "direct_output_forward_char(0)" here, |
| 1067 | but it's not clear why, since it may not do anything anyway. */ |
| 1068 | } |
| 1069 | else |
| 1070 | { |
| 1071 | Lisp_Object tail, frame; |
| 1072 | frame_garbaged = 1; |
| 1073 | FOR_EACH_FRAME (tail, frame) |
| 1074 | { |
| 1075 | if ((FRAME_TERMCAP_P (XFRAME (frame)) |
| 1076 | || FRAME_MSDOS_P (XFRAME (frame))) |
| 1077 | && FRAME_TTY (XFRAME (frame)) == tty_out) |
| 1078 | FRAME_GARBAGED_P (XFRAME (frame)) = 1; |
| 1079 | } |
| 1080 | } |
| 1081 | |
| 1082 | tty_out->term_initted = 1; |
| 1083 | } |
| 1084 | |
| 1085 | /* Return true if safe to use tabs in output. |
| 1086 | At the time this is called, init_sys_modes has not been done yet. */ |
| 1087 | |
| 1088 | bool |
| 1089 | tabs_safe_p (int fd) |
| 1090 | { |
| 1091 | struct emacs_tty etty; |
| 1092 | |
| 1093 | emacs_get_tty (fd, &etty); |
| 1094 | #ifndef DOS_NT |
| 1095 | #ifdef TABDLY |
| 1096 | return ((etty.main.c_oflag & TABDLY) != TAB3); |
| 1097 | #else /* not TABDLY */ |
| 1098 | return 1; |
| 1099 | #endif /* not TABDLY */ |
| 1100 | #else /* DOS_NT */ |
| 1101 | return 0; |
| 1102 | #endif /* DOS_NT */ |
| 1103 | } |
| 1104 | \f |
| 1105 | /* Get terminal size from system. |
| 1106 | Store number of lines into *HEIGHTP and width into *WIDTHP. |
| 1107 | We store 0 if there's no valid information. */ |
| 1108 | |
| 1109 | void |
| 1110 | get_tty_size (int fd, int *widthp, int *heightp) |
| 1111 | { |
| 1112 | #if defined TIOCGWINSZ |
| 1113 | |
| 1114 | /* BSD-style. */ |
| 1115 | struct winsize size; |
| 1116 | |
| 1117 | if (ioctl (fd, TIOCGWINSZ, &size) == -1) |
| 1118 | *widthp = *heightp = 0; |
| 1119 | else |
| 1120 | { |
| 1121 | *widthp = size.ws_col; |
| 1122 | *heightp = size.ws_row; |
| 1123 | } |
| 1124 | |
| 1125 | #elif defined TIOCGSIZE |
| 1126 | |
| 1127 | /* SunOS - style. */ |
| 1128 | struct ttysize size; |
| 1129 | |
| 1130 | if (ioctl (fd, TIOCGSIZE, &size) == -1) |
| 1131 | *widthp = *heightp = 0; |
| 1132 | else |
| 1133 | { |
| 1134 | *widthp = size.ts_cols; |
| 1135 | *heightp = size.ts_lines; |
| 1136 | } |
| 1137 | |
| 1138 | #elif defined WINDOWSNT |
| 1139 | |
| 1140 | CONSOLE_SCREEN_BUFFER_INFO info; |
| 1141 | if (GetConsoleScreenBufferInfo (GetStdHandle (STD_OUTPUT_HANDLE), &info)) |
| 1142 | { |
| 1143 | *widthp = info.srWindow.Right - info.srWindow.Left + 1; |
| 1144 | *heightp = info.srWindow.Bottom - info.srWindow.Top + 1; |
| 1145 | } |
| 1146 | else |
| 1147 | *widthp = *heightp = 0; |
| 1148 | |
| 1149 | #elif defined MSDOS |
| 1150 | |
| 1151 | *widthp = ScreenCols (); |
| 1152 | *heightp = ScreenRows (); |
| 1153 | |
| 1154 | #else /* system doesn't know size */ |
| 1155 | |
| 1156 | *widthp = 0; |
| 1157 | *heightp = 0; |
| 1158 | |
| 1159 | #endif |
| 1160 | } |
| 1161 | |
| 1162 | /* Set the logical window size associated with descriptor FD |
| 1163 | to HEIGHT and WIDTH. This is used mainly with ptys. |
| 1164 | Return a negative value on failure. */ |
| 1165 | |
| 1166 | int |
| 1167 | set_window_size (int fd, int height, int width) |
| 1168 | { |
| 1169 | #ifdef TIOCSWINSZ |
| 1170 | |
| 1171 | /* BSD-style. */ |
| 1172 | struct winsize size; |
| 1173 | size.ws_row = height; |
| 1174 | size.ws_col = width; |
| 1175 | |
| 1176 | return ioctl (fd, TIOCSWINSZ, &size); |
| 1177 | |
| 1178 | #else |
| 1179 | #ifdef TIOCSSIZE |
| 1180 | |
| 1181 | /* SunOS - style. */ |
| 1182 | struct ttysize size; |
| 1183 | size.ts_lines = height; |
| 1184 | size.ts_cols = width; |
| 1185 | |
| 1186 | return ioctl (fd, TIOCGSIZE, &size); |
| 1187 | #else |
| 1188 | return -1; |
| 1189 | #endif /* not SunOS-style */ |
| 1190 | #endif /* not BSD-style */ |
| 1191 | } |
| 1192 | |
| 1193 | \f |
| 1194 | |
| 1195 | /* Prepare all terminal devices for exiting Emacs. */ |
| 1196 | |
| 1197 | void |
| 1198 | reset_all_sys_modes (void) |
| 1199 | { |
| 1200 | struct tty_display_info *tty; |
| 1201 | for (tty = tty_list; tty; tty = tty->next) |
| 1202 | reset_sys_modes (tty); |
| 1203 | } |
| 1204 | |
| 1205 | /* Prepare the terminal for closing it; move the cursor to the |
| 1206 | bottom of the frame, turn off interrupt-driven I/O, etc. */ |
| 1207 | |
| 1208 | void |
| 1209 | reset_sys_modes (struct tty_display_info *tty_out) |
| 1210 | { |
| 1211 | if (noninteractive) |
| 1212 | { |
| 1213 | fflush (stdout); |
| 1214 | return; |
| 1215 | } |
| 1216 | if (!tty_out->term_initted) |
| 1217 | return; |
| 1218 | |
| 1219 | if (!tty_out->output) |
| 1220 | return; /* The tty is suspended. */ |
| 1221 | |
| 1222 | /* Go to and clear the last line of the terminal. */ |
| 1223 | |
| 1224 | cmgoto (tty_out, FrameRows (tty_out) - 1, 0); |
| 1225 | |
| 1226 | /* Code adapted from tty_clear_end_of_line. */ |
| 1227 | if (tty_out->TS_clr_line) |
| 1228 | { |
| 1229 | emacs_tputs (tty_out, tty_out->TS_clr_line, 1, cmputc); |
| 1230 | } |
| 1231 | else |
| 1232 | { /* have to do it the hard way */ |
| 1233 | int i; |
| 1234 | tty_turn_off_insert (tty_out); |
| 1235 | |
| 1236 | for (i = cursorX (tty_out); i < FrameCols (tty_out) - 1; i++) |
| 1237 | { |
| 1238 | fputc (' ', tty_out->output); |
| 1239 | } |
| 1240 | } |
| 1241 | |
| 1242 | cmgoto (tty_out, FrameRows (tty_out) - 1, 0); |
| 1243 | fflush (tty_out->output); |
| 1244 | |
| 1245 | if (tty_out->terminal->reset_terminal_modes_hook) |
| 1246 | tty_out->terminal->reset_terminal_modes_hook (tty_out->terminal); |
| 1247 | |
| 1248 | /* Avoid possible loss of output when changing terminal modes. */ |
| 1249 | while (fdatasync (fileno (tty_out->output)) != 0 && errno == EINTR) |
| 1250 | continue; |
| 1251 | |
| 1252 | #ifndef DOS_NT |
| 1253 | #ifdef F_SETOWN |
| 1254 | if (interrupt_input) |
| 1255 | { |
| 1256 | reset_sigio (fileno (tty_out->input)); |
| 1257 | fcntl (fileno (tty_out->input), F_SETOWN, |
| 1258 | old_fcntl_owner[fileno (tty_out->input)]); |
| 1259 | } |
| 1260 | #endif /* F_SETOWN */ |
| 1261 | fcntl (fileno (tty_out->input), F_SETFL, |
| 1262 | fcntl (fileno (tty_out->input), F_GETFL, 0) & ~O_NONBLOCK); |
| 1263 | #endif |
| 1264 | |
| 1265 | if (tty_out->old_tty) |
| 1266 | while (emacs_set_tty (fileno (tty_out->input), |
| 1267 | tty_out->old_tty, 0) < 0 && errno == EINTR) |
| 1268 | ; |
| 1269 | |
| 1270 | #ifdef MSDOS /* Demacs 1.1.2 91/10/20 Manabu Higashida */ |
| 1271 | dos_ttcooked (); |
| 1272 | #endif |
| 1273 | |
| 1274 | widen_foreground_group (fileno (tty_out->input)); |
| 1275 | } |
| 1276 | \f |
| 1277 | #ifdef HAVE_PTYS |
| 1278 | |
| 1279 | /* Set up the proper status flags for use of a pty. */ |
| 1280 | |
| 1281 | void |
| 1282 | setup_pty (int fd) |
| 1283 | { |
| 1284 | /* I'm told that TOICREMOTE does not mean control chars |
| 1285 | "can't be sent" but rather that they don't have |
| 1286 | input-editing or signaling effects. |
| 1287 | That should be good, because we have other ways |
| 1288 | to do those things in Emacs. |
| 1289 | However, telnet mode seems not to work on 4.2. |
| 1290 | So TIOCREMOTE is turned off now. */ |
| 1291 | |
| 1292 | /* Under hp-ux, if TIOCREMOTE is turned on, some calls |
| 1293 | will hang. In particular, the "timeout" feature (which |
| 1294 | causes a read to return if there is no data available) |
| 1295 | does this. Also it is known that telnet mode will hang |
| 1296 | in such a way that Emacs must be stopped (perhaps this |
| 1297 | is the same problem). |
| 1298 | |
| 1299 | If TIOCREMOTE is turned off, then there is a bug in |
| 1300 | hp-ux which sometimes loses data. Apparently the |
| 1301 | code which blocks the master process when the internal |
| 1302 | buffer fills up does not work. Other than this, |
| 1303 | though, everything else seems to work fine. |
| 1304 | |
| 1305 | Since the latter lossage is more benign, we may as well |
| 1306 | lose that way. -- cph */ |
| 1307 | #ifdef FIONBIO |
| 1308 | #if defined (UNIX98_PTYS) |
| 1309 | { |
| 1310 | int on = 1; |
| 1311 | ioctl (fd, FIONBIO, &on); |
| 1312 | } |
| 1313 | #endif |
| 1314 | #endif |
| 1315 | } |
| 1316 | #endif /* HAVE_PTYS */ |
| 1317 | \f |
| 1318 | #ifdef HAVE_SOCKETS |
| 1319 | #include <sys/socket.h> |
| 1320 | #include <netdb.h> |
| 1321 | #endif /* HAVE_SOCKETS */ |
| 1322 | |
| 1323 | #ifdef TRY_AGAIN |
| 1324 | #ifndef HAVE_H_ERRNO |
| 1325 | extern int h_errno; |
| 1326 | #endif |
| 1327 | #endif /* TRY_AGAIN */ |
| 1328 | |
| 1329 | void |
| 1330 | init_system_name (void) |
| 1331 | { |
| 1332 | #ifndef HAVE_GETHOSTNAME |
| 1333 | struct utsname uts; |
| 1334 | uname (&uts); |
| 1335 | Vsystem_name = build_string (uts.nodename); |
| 1336 | #else /* HAVE_GETHOSTNAME */ |
| 1337 | char *hostname_alloc = NULL; |
| 1338 | char hostname_buf[256]; |
| 1339 | ptrdiff_t hostname_size = sizeof hostname_buf; |
| 1340 | char *hostname = hostname_buf; |
| 1341 | |
| 1342 | /* Try to get the host name; if the buffer is too short, try |
| 1343 | again. Apparently, the only indication gethostname gives of |
| 1344 | whether the buffer was large enough is the presence or absence |
| 1345 | of a '\0' in the string. Eech. */ |
| 1346 | for (;;) |
| 1347 | { |
| 1348 | gethostname (hostname, hostname_size - 1); |
| 1349 | hostname[hostname_size - 1] = '\0'; |
| 1350 | |
| 1351 | /* Was the buffer large enough for the '\0'? */ |
| 1352 | if (strlen (hostname) < hostname_size - 1) |
| 1353 | break; |
| 1354 | |
| 1355 | hostname = hostname_alloc = xpalloc (hostname_alloc, &hostname_size, 1, |
| 1356 | min (PTRDIFF_MAX, SIZE_MAX), 1); |
| 1357 | } |
| 1358 | #ifdef HAVE_SOCKETS |
| 1359 | /* Turn the hostname into the official, fully-qualified hostname. |
| 1360 | Don't do this if we're going to dump; this can confuse system |
| 1361 | libraries on some machines and make the dumped emacs core dump. */ |
| 1362 | #ifndef CANNOT_DUMP |
| 1363 | if (initialized) |
| 1364 | #endif /* not CANNOT_DUMP */ |
| 1365 | if (! strchr (hostname, '.')) |
| 1366 | { |
| 1367 | int count; |
| 1368 | #ifdef HAVE_GETADDRINFO |
| 1369 | struct addrinfo *res; |
| 1370 | struct addrinfo hints; |
| 1371 | int ret; |
| 1372 | |
| 1373 | memset (&hints, 0, sizeof (hints)); |
| 1374 | hints.ai_socktype = SOCK_STREAM; |
| 1375 | hints.ai_flags = AI_CANONNAME; |
| 1376 | |
| 1377 | for (count = 0;; count++) |
| 1378 | { |
| 1379 | if ((ret = getaddrinfo (hostname, NULL, &hints, &res)) == 0 |
| 1380 | || ret != EAI_AGAIN) |
| 1381 | break; |
| 1382 | |
| 1383 | if (count >= 5) |
| 1384 | break; |
| 1385 | Fsleep_for (make_number (1), Qnil); |
| 1386 | } |
| 1387 | |
| 1388 | if (ret == 0) |
| 1389 | { |
| 1390 | struct addrinfo *it = res; |
| 1391 | while (it) |
| 1392 | { |
| 1393 | char *fqdn = it->ai_canonname; |
| 1394 | if (fqdn && strchr (fqdn, '.') |
| 1395 | && strcmp (fqdn, "localhost.localdomain") != 0) |
| 1396 | break; |
| 1397 | it = it->ai_next; |
| 1398 | } |
| 1399 | if (it) |
| 1400 | { |
| 1401 | ptrdiff_t len = strlen (it->ai_canonname); |
| 1402 | if (hostname_size <= len) |
| 1403 | { |
| 1404 | hostname_size = len + 1; |
| 1405 | hostname = hostname_alloc = xrealloc (hostname_alloc, |
| 1406 | hostname_size); |
| 1407 | } |
| 1408 | strcpy (hostname, it->ai_canonname); |
| 1409 | } |
| 1410 | freeaddrinfo (res); |
| 1411 | } |
| 1412 | #else /* !HAVE_GETADDRINFO */ |
| 1413 | struct hostent *hp; |
| 1414 | for (count = 0;; count++) |
| 1415 | { |
| 1416 | |
| 1417 | #ifdef TRY_AGAIN |
| 1418 | h_errno = 0; |
| 1419 | #endif |
| 1420 | hp = gethostbyname (hostname); |
| 1421 | #ifdef TRY_AGAIN |
| 1422 | if (! (hp == 0 && h_errno == TRY_AGAIN)) |
| 1423 | #endif |
| 1424 | |
| 1425 | break; |
| 1426 | |
| 1427 | if (count >= 5) |
| 1428 | break; |
| 1429 | Fsleep_for (make_number (1), Qnil); |
| 1430 | } |
| 1431 | |
| 1432 | if (hp) |
| 1433 | { |
| 1434 | char *fqdn = (char *) hp->h_name; |
| 1435 | |
| 1436 | if (!strchr (fqdn, '.')) |
| 1437 | { |
| 1438 | /* We still don't have a fully qualified domain name. |
| 1439 | Try to find one in the list of alternate names */ |
| 1440 | char **alias = hp->h_aliases; |
| 1441 | while (*alias |
| 1442 | && (!strchr (*alias, '.') |
| 1443 | || !strcmp (*alias, "localhost.localdomain"))) |
| 1444 | alias++; |
| 1445 | if (*alias) |
| 1446 | fqdn = *alias; |
| 1447 | } |
| 1448 | hostname = fqdn; |
| 1449 | } |
| 1450 | #endif /* !HAVE_GETADDRINFO */ |
| 1451 | } |
| 1452 | #endif /* HAVE_SOCKETS */ |
| 1453 | Vsystem_name = build_string (hostname); |
| 1454 | xfree (hostname_alloc); |
| 1455 | #endif /* HAVE_GETHOSTNAME */ |
| 1456 | { |
| 1457 | char *p; |
| 1458 | for (p = SSDATA (Vsystem_name); *p; p++) |
| 1459 | if (*p == ' ' || *p == '\t') |
| 1460 | *p = '-'; |
| 1461 | } |
| 1462 | } |
| 1463 | \f |
| 1464 | sigset_t empty_mask; |
| 1465 | |
| 1466 | static struct sigaction process_fatal_action; |
| 1467 | |
| 1468 | static int |
| 1469 | emacs_sigaction_flags (void) |
| 1470 | { |
| 1471 | #ifdef SA_RESTART |
| 1472 | /* SA_RESTART causes interruptible functions with timeouts (e.g., |
| 1473 | 'select') to reset their timeout on some platforms (e.g., |
| 1474 | HP-UX 11), which is not what we want. Also, when Emacs is |
| 1475 | interactive, we don't want SA_RESTART because we need to poll |
| 1476 | for pending input so we need long-running syscalls to be interrupted |
| 1477 | after a signal that sets pending_signals. |
| 1478 | |
| 1479 | Non-interactive keyboard input goes through stdio, where we |
| 1480 | always want restartable system calls. */ |
| 1481 | if (noninteractive) |
| 1482 | return SA_RESTART; |
| 1483 | #endif |
| 1484 | return 0; |
| 1485 | } |
| 1486 | |
| 1487 | /* Store into *ACTION a signal action suitable for Emacs, with handler |
| 1488 | HANDLER. */ |
| 1489 | void |
| 1490 | emacs_sigaction_init (struct sigaction *action, signal_handler_t handler) |
| 1491 | { |
| 1492 | sigemptyset (&action->sa_mask); |
| 1493 | |
| 1494 | /* When handling a signal, block nonfatal system signals that are caught |
| 1495 | by Emacs. This makes race conditions less likely. */ |
| 1496 | sigaddset (&action->sa_mask, SIGALRM); |
| 1497 | #ifdef SIGCHLD |
| 1498 | sigaddset (&action->sa_mask, SIGCHLD); |
| 1499 | #endif |
| 1500 | #ifdef SIGDANGER |
| 1501 | sigaddset (&action->sa_mask, SIGDANGER); |
| 1502 | #endif |
| 1503 | #ifdef PROFILER_CPU_SUPPORT |
| 1504 | sigaddset (&action->sa_mask, SIGPROF); |
| 1505 | #endif |
| 1506 | #ifdef SIGWINCH |
| 1507 | sigaddset (&action->sa_mask, SIGWINCH); |
| 1508 | #endif |
| 1509 | if (! noninteractive) |
| 1510 | { |
| 1511 | sigaddset (&action->sa_mask, SIGINT); |
| 1512 | sigaddset (&action->sa_mask, SIGQUIT); |
| 1513 | #ifdef USABLE_SIGIO |
| 1514 | sigaddset (&action->sa_mask, SIGIO); |
| 1515 | #endif |
| 1516 | } |
| 1517 | |
| 1518 | action->sa_handler = handler; |
| 1519 | action->sa_flags = emacs_sigaction_flags (); |
| 1520 | } |
| 1521 | |
| 1522 | #ifdef FORWARD_SIGNAL_TO_MAIN_THREAD |
| 1523 | static pthread_t main_thread; |
| 1524 | #endif |
| 1525 | |
| 1526 | /* SIG has arrived at the current process. Deliver it to the main |
| 1527 | thread, which should handle it with HANDLER. |
| 1528 | |
| 1529 | If we are on the main thread, handle the signal SIG with HANDLER. |
| 1530 | Otherwise, redirect the signal to the main thread, blocking it from |
| 1531 | this thread. POSIX says any thread can receive a signal that is |
| 1532 | associated with a process, process group, or asynchronous event. |
| 1533 | On GNU/Linux that is not true, but for other systems (FreeBSD at |
| 1534 | least) it is. */ |
| 1535 | void |
| 1536 | deliver_process_signal (int sig, signal_handler_t handler) |
| 1537 | { |
| 1538 | /* Preserve errno, to avoid race conditions with signal handlers that |
| 1539 | might change errno. Races can occur even in single-threaded hosts. */ |
| 1540 | int old_errno = errno; |
| 1541 | |
| 1542 | bool on_main_thread = true; |
| 1543 | #ifdef FORWARD_SIGNAL_TO_MAIN_THREAD |
| 1544 | if (! pthread_equal (pthread_self (), main_thread)) |
| 1545 | { |
| 1546 | sigset_t blocked; |
| 1547 | sigemptyset (&blocked); |
| 1548 | sigaddset (&blocked, sig); |
| 1549 | pthread_sigmask (SIG_BLOCK, &blocked, 0); |
| 1550 | pthread_kill (main_thread, sig); |
| 1551 | on_main_thread = false; |
| 1552 | } |
| 1553 | #endif |
| 1554 | if (on_main_thread) |
| 1555 | handler (sig); |
| 1556 | |
| 1557 | errno = old_errno; |
| 1558 | } |
| 1559 | |
| 1560 | /* Static location to save a fatal backtrace in a thread. |
| 1561 | FIXME: If two subsidiary threads fail simultaneously, the resulting |
| 1562 | backtrace may be garbage. */ |
| 1563 | enum { BACKTRACE_LIMIT_MAX = 500 }; |
| 1564 | static void *thread_backtrace_buffer[BACKTRACE_LIMIT_MAX + 1]; |
| 1565 | static int thread_backtrace_npointers; |
| 1566 | |
| 1567 | /* SIG has arrived at the current thread. |
| 1568 | If we are on the main thread, handle the signal SIG with HANDLER. |
| 1569 | Otherwise, this is a fatal error in the handling thread. */ |
| 1570 | static void |
| 1571 | deliver_thread_signal (int sig, signal_handler_t handler) |
| 1572 | { |
| 1573 | int old_errno = errno; |
| 1574 | |
| 1575 | #ifdef FORWARD_SIGNAL_TO_MAIN_THREAD |
| 1576 | if (! pthread_equal (pthread_self (), main_thread)) |
| 1577 | { |
| 1578 | thread_backtrace_npointers |
| 1579 | = backtrace (thread_backtrace_buffer, BACKTRACE_LIMIT_MAX); |
| 1580 | sigaction (sig, &process_fatal_action, 0); |
| 1581 | pthread_kill (main_thread, sig); |
| 1582 | |
| 1583 | /* Avoid further damage while the main thread is exiting. */ |
| 1584 | while (1) |
| 1585 | sigsuspend (&empty_mask); |
| 1586 | } |
| 1587 | #endif |
| 1588 | |
| 1589 | handler (sig); |
| 1590 | errno = old_errno; |
| 1591 | } |
| 1592 | \f |
| 1593 | #if !HAVE_DECL_SYS_SIGLIST |
| 1594 | # undef sys_siglist |
| 1595 | # ifdef _sys_siglist |
| 1596 | # define sys_siglist _sys_siglist |
| 1597 | # elif HAVE_DECL___SYS_SIGLIST |
| 1598 | # define sys_siglist __sys_siglist |
| 1599 | # else |
| 1600 | # define sys_siglist my_sys_siglist |
| 1601 | static char const *sys_siglist[NSIG]; |
| 1602 | # endif |
| 1603 | #endif |
| 1604 | |
| 1605 | #ifdef _sys_nsig |
| 1606 | # define sys_siglist_entries _sys_nsig |
| 1607 | #else |
| 1608 | # define sys_siglist_entries NSIG |
| 1609 | #endif |
| 1610 | |
| 1611 | /* Handle bus errors, invalid instruction, etc. */ |
| 1612 | static void |
| 1613 | handle_fatal_signal (int sig) |
| 1614 | { |
| 1615 | terminate_due_to_signal (sig, 40); |
| 1616 | } |
| 1617 | |
| 1618 | static void |
| 1619 | deliver_fatal_signal (int sig) |
| 1620 | { |
| 1621 | deliver_process_signal (sig, handle_fatal_signal); |
| 1622 | } |
| 1623 | |
| 1624 | static void |
| 1625 | deliver_fatal_thread_signal (int sig) |
| 1626 | { |
| 1627 | deliver_thread_signal (sig, handle_fatal_signal); |
| 1628 | } |
| 1629 | |
| 1630 | static _Noreturn void |
| 1631 | handle_arith_signal (int sig) |
| 1632 | { |
| 1633 | pthread_sigmask (SIG_SETMASK, &empty_mask, 0); |
| 1634 | xsignal0 (Qarith_error); |
| 1635 | } |
| 1636 | |
| 1637 | static void |
| 1638 | deliver_arith_signal (int sig) |
| 1639 | { |
| 1640 | deliver_thread_signal (sig, handle_arith_signal); |
| 1641 | } |
| 1642 | |
| 1643 | #ifdef SIGDANGER |
| 1644 | |
| 1645 | /* Handler for SIGDANGER. */ |
| 1646 | static void |
| 1647 | handle_danger_signal (int sig) |
| 1648 | { |
| 1649 | malloc_warning ("Operating system warns that virtual memory is running low.\n"); |
| 1650 | |
| 1651 | /* It might be unsafe to call do_auto_save now. */ |
| 1652 | force_auto_save_soon (); |
| 1653 | } |
| 1654 | |
| 1655 | static void |
| 1656 | deliver_danger_signal (int sig) |
| 1657 | { |
| 1658 | deliver_process_signal (sig, handle_danger_signal); |
| 1659 | } |
| 1660 | #endif |
| 1661 | |
| 1662 | /* Treat SIG as a terminating signal, unless it is already ignored and |
| 1663 | we are in --batch mode. Among other things, this makes nohup work. */ |
| 1664 | static void |
| 1665 | maybe_fatal_sig (int sig) |
| 1666 | { |
| 1667 | bool catch_sig = !noninteractive; |
| 1668 | if (!catch_sig) |
| 1669 | { |
| 1670 | struct sigaction old_action; |
| 1671 | sigaction (sig, 0, &old_action); |
| 1672 | catch_sig = old_action.sa_handler != SIG_IGN; |
| 1673 | } |
| 1674 | if (catch_sig) |
| 1675 | sigaction (sig, &process_fatal_action, 0); |
| 1676 | } |
| 1677 | |
| 1678 | void |
| 1679 | init_signals (bool dumping) |
| 1680 | { |
| 1681 | struct sigaction thread_fatal_action; |
| 1682 | struct sigaction action; |
| 1683 | |
| 1684 | sigemptyset (&empty_mask); |
| 1685 | |
| 1686 | #ifdef FORWARD_SIGNAL_TO_MAIN_THREAD |
| 1687 | main_thread = pthread_self (); |
| 1688 | #endif |
| 1689 | |
| 1690 | #if !HAVE_DECL_SYS_SIGLIST && !defined _sys_siglist |
| 1691 | if (! initialized) |
| 1692 | { |
| 1693 | sys_siglist[SIGABRT] = "Aborted"; |
| 1694 | # ifdef SIGAIO |
| 1695 | sys_siglist[SIGAIO] = "LAN I/O interrupt"; |
| 1696 | # endif |
| 1697 | sys_siglist[SIGALRM] = "Alarm clock"; |
| 1698 | # ifdef SIGBUS |
| 1699 | sys_siglist[SIGBUS] = "Bus error"; |
| 1700 | # endif |
| 1701 | # ifdef SIGCHLD |
| 1702 | sys_siglist[SIGCHLD] = "Child status changed"; |
| 1703 | # endif |
| 1704 | # ifdef SIGCONT |
| 1705 | sys_siglist[SIGCONT] = "Continued"; |
| 1706 | # endif |
| 1707 | # ifdef SIGDANGER |
| 1708 | sys_siglist[SIGDANGER] = "Swap space dangerously low"; |
| 1709 | # endif |
| 1710 | # ifdef SIGDGNOTIFY |
| 1711 | sys_siglist[SIGDGNOTIFY] = "Notification message in queue"; |
| 1712 | # endif |
| 1713 | # ifdef SIGEMT |
| 1714 | sys_siglist[SIGEMT] = "Emulation trap"; |
| 1715 | # endif |
| 1716 | sys_siglist[SIGFPE] = "Arithmetic exception"; |
| 1717 | # ifdef SIGFREEZE |
| 1718 | sys_siglist[SIGFREEZE] = "SIGFREEZE"; |
| 1719 | # endif |
| 1720 | # ifdef SIGGRANT |
| 1721 | sys_siglist[SIGGRANT] = "Monitor mode granted"; |
| 1722 | # endif |
| 1723 | sys_siglist[SIGHUP] = "Hangup"; |
| 1724 | sys_siglist[SIGILL] = "Illegal instruction"; |
| 1725 | sys_siglist[SIGINT] = "Interrupt"; |
| 1726 | # ifdef SIGIO |
| 1727 | sys_siglist[SIGIO] = "I/O possible"; |
| 1728 | # endif |
| 1729 | # ifdef SIGIOINT |
| 1730 | sys_siglist[SIGIOINT] = "I/O intervention required"; |
| 1731 | # endif |
| 1732 | # ifdef SIGIOT |
| 1733 | sys_siglist[SIGIOT] = "IOT trap"; |
| 1734 | # endif |
| 1735 | sys_siglist[SIGKILL] = "Killed"; |
| 1736 | # ifdef SIGLOST |
| 1737 | sys_siglist[SIGLOST] = "Resource lost"; |
| 1738 | # endif |
| 1739 | # ifdef SIGLWP |
| 1740 | sys_siglist[SIGLWP] = "SIGLWP"; |
| 1741 | # endif |
| 1742 | # ifdef SIGMSG |
| 1743 | sys_siglist[SIGMSG] = "Monitor mode data available"; |
| 1744 | # endif |
| 1745 | # ifdef SIGPHONE |
| 1746 | sys_siglist[SIGWIND] = "SIGPHONE"; |
| 1747 | # endif |
| 1748 | sys_siglist[SIGPIPE] = "Broken pipe"; |
| 1749 | # ifdef SIGPOLL |
| 1750 | sys_siglist[SIGPOLL] = "Pollable event occurred"; |
| 1751 | # endif |
| 1752 | # ifdef SIGPROF |
| 1753 | sys_siglist[SIGPROF] = "Profiling timer expired"; |
| 1754 | # endif |
| 1755 | # ifdef SIGPTY |
| 1756 | sys_siglist[SIGPTY] = "PTY I/O interrupt"; |
| 1757 | # endif |
| 1758 | # ifdef SIGPWR |
| 1759 | sys_siglist[SIGPWR] = "Power-fail restart"; |
| 1760 | # endif |
| 1761 | sys_siglist[SIGQUIT] = "Quit"; |
| 1762 | # ifdef SIGRETRACT |
| 1763 | sys_siglist[SIGRETRACT] = "Need to relinquish monitor mode"; |
| 1764 | # endif |
| 1765 | # ifdef SIGSAK |
| 1766 | sys_siglist[SIGSAK] = "Secure attention"; |
| 1767 | # endif |
| 1768 | sys_siglist[SIGSEGV] = "Segmentation violation"; |
| 1769 | # ifdef SIGSOUND |
| 1770 | sys_siglist[SIGSOUND] = "Sound completed"; |
| 1771 | # endif |
| 1772 | # ifdef SIGSTOP |
| 1773 | sys_siglist[SIGSTOP] = "Stopped (signal)"; |
| 1774 | # endif |
| 1775 | # ifdef SIGSTP |
| 1776 | sys_siglist[SIGSTP] = "Stopped (user)"; |
| 1777 | # endif |
| 1778 | # ifdef SIGSYS |
| 1779 | sys_siglist[SIGSYS] = "Bad argument to system call"; |
| 1780 | # endif |
| 1781 | sys_siglist[SIGTERM] = "Terminated"; |
| 1782 | # ifdef SIGTHAW |
| 1783 | sys_siglist[SIGTHAW] = "SIGTHAW"; |
| 1784 | # endif |
| 1785 | # ifdef SIGTRAP |
| 1786 | sys_siglist[SIGTRAP] = "Trace/breakpoint trap"; |
| 1787 | # endif |
| 1788 | # ifdef SIGTSTP |
| 1789 | sys_siglist[SIGTSTP] = "Stopped (user)"; |
| 1790 | # endif |
| 1791 | # ifdef SIGTTIN |
| 1792 | sys_siglist[SIGTTIN] = "Stopped (tty input)"; |
| 1793 | # endif |
| 1794 | # ifdef SIGTTOU |
| 1795 | sys_siglist[SIGTTOU] = "Stopped (tty output)"; |
| 1796 | # endif |
| 1797 | # ifdef SIGURG |
| 1798 | sys_siglist[SIGURG] = "Urgent I/O condition"; |
| 1799 | # endif |
| 1800 | # ifdef SIGUSR1 |
| 1801 | sys_siglist[SIGUSR1] = "User defined signal 1"; |
| 1802 | # endif |
| 1803 | # ifdef SIGUSR2 |
| 1804 | sys_siglist[SIGUSR2] = "User defined signal 2"; |
| 1805 | # endif |
| 1806 | # ifdef SIGVTALRM |
| 1807 | sys_siglist[SIGVTALRM] = "Virtual timer expired"; |
| 1808 | # endif |
| 1809 | # ifdef SIGWAITING |
| 1810 | sys_siglist[SIGWAITING] = "Process's LWPs are blocked"; |
| 1811 | # endif |
| 1812 | # ifdef SIGWINCH |
| 1813 | sys_siglist[SIGWINCH] = "Window size changed"; |
| 1814 | # endif |
| 1815 | # ifdef SIGWIND |
| 1816 | sys_siglist[SIGWIND] = "SIGWIND"; |
| 1817 | # endif |
| 1818 | # ifdef SIGXCPU |
| 1819 | sys_siglist[SIGXCPU] = "CPU time limit exceeded"; |
| 1820 | # endif |
| 1821 | # ifdef SIGXFSZ |
| 1822 | sys_siglist[SIGXFSZ] = "File size limit exceeded"; |
| 1823 | # endif |
| 1824 | } |
| 1825 | #endif /* !HAVE_DECL_SYS_SIGLIST && !_sys_siglist */ |
| 1826 | |
| 1827 | /* Don't alter signal handlers if dumping. On some machines, |
| 1828 | changing signal handlers sets static data that would make signals |
| 1829 | fail to work right when the dumped Emacs is run. */ |
| 1830 | if (dumping) |
| 1831 | return; |
| 1832 | |
| 1833 | sigfillset (&process_fatal_action.sa_mask); |
| 1834 | process_fatal_action.sa_handler = deliver_fatal_signal; |
| 1835 | process_fatal_action.sa_flags = emacs_sigaction_flags (); |
| 1836 | |
| 1837 | sigfillset (&thread_fatal_action.sa_mask); |
| 1838 | thread_fatal_action.sa_handler = deliver_fatal_thread_signal; |
| 1839 | thread_fatal_action.sa_flags = process_fatal_action.sa_flags; |
| 1840 | |
| 1841 | /* SIGINT may need special treatment on MS-Windows. See |
| 1842 | http://lists.gnu.org/archive/html/emacs-devel/2010-09/msg01062.html |
| 1843 | Please update the doc of kill-emacs, kill-emacs-hook, and |
| 1844 | NEWS if you change this. */ |
| 1845 | |
| 1846 | maybe_fatal_sig (SIGHUP); |
| 1847 | maybe_fatal_sig (SIGINT); |
| 1848 | maybe_fatal_sig (SIGTERM); |
| 1849 | |
| 1850 | /* Emacs checks for write errors, so it can safely ignore SIGPIPE. |
| 1851 | However, in batch mode leave SIGPIPE alone, as that causes Emacs |
| 1852 | to behave more like typical batch applications do. */ |
| 1853 | if (! noninteractive) |
| 1854 | signal (SIGPIPE, SIG_IGN); |
| 1855 | |
| 1856 | sigaction (SIGQUIT, &process_fatal_action, 0); |
| 1857 | sigaction (SIGILL, &thread_fatal_action, 0); |
| 1858 | sigaction (SIGTRAP, &thread_fatal_action, 0); |
| 1859 | |
| 1860 | /* Typically SIGFPE is thread-specific and is fatal, like SIGILL. |
| 1861 | But on a non-IEEE host SIGFPE can come from a trap in the Lisp |
| 1862 | interpreter's floating point operations, so treat SIGFPE as an |
| 1863 | arith-error if it arises in the main thread. */ |
| 1864 | if (IEEE_FLOATING_POINT) |
| 1865 | sigaction (SIGFPE, &thread_fatal_action, 0); |
| 1866 | else |
| 1867 | { |
| 1868 | emacs_sigaction_init (&action, deliver_arith_signal); |
| 1869 | sigaction (SIGFPE, &action, 0); |
| 1870 | } |
| 1871 | |
| 1872 | #ifdef SIGUSR1 |
| 1873 | add_user_signal (SIGUSR1, "sigusr1"); |
| 1874 | #endif |
| 1875 | #ifdef SIGUSR2 |
| 1876 | add_user_signal (SIGUSR2, "sigusr2"); |
| 1877 | #endif |
| 1878 | sigaction (SIGABRT, &thread_fatal_action, 0); |
| 1879 | #ifdef SIGPRE |
| 1880 | sigaction (SIGPRE, &thread_fatal_action, 0); |
| 1881 | #endif |
| 1882 | #ifdef SIGORE |
| 1883 | sigaction (SIGORE, &thread_fatal_action, 0); |
| 1884 | #endif |
| 1885 | #ifdef SIGUME |
| 1886 | sigaction (SIGUME, &thread_fatal_action, 0); |
| 1887 | #endif |
| 1888 | #ifdef SIGDLK |
| 1889 | sigaction (SIGDLK, &process_fatal_action, 0); |
| 1890 | #endif |
| 1891 | #ifdef SIGCPULIM |
| 1892 | sigaction (SIGCPULIM, &process_fatal_action, 0); |
| 1893 | #endif |
| 1894 | #ifdef SIGIOT |
| 1895 | sigaction (SIGIOT, &thread_fatal_action, 0); |
| 1896 | #endif |
| 1897 | #ifdef SIGEMT |
| 1898 | sigaction (SIGEMT, &thread_fatal_action, 0); |
| 1899 | #endif |
| 1900 | #ifdef SIGBUS |
| 1901 | sigaction (SIGBUS, &thread_fatal_action, 0); |
| 1902 | #endif |
| 1903 | sigaction (SIGSEGV, &thread_fatal_action, 0); |
| 1904 | #ifdef SIGSYS |
| 1905 | sigaction (SIGSYS, &thread_fatal_action, 0); |
| 1906 | #endif |
| 1907 | sigaction (SIGTERM, &process_fatal_action, 0); |
| 1908 | #ifdef SIGPROF |
| 1909 | signal (SIGPROF, SIG_IGN); |
| 1910 | #endif |
| 1911 | #ifdef SIGVTALRM |
| 1912 | sigaction (SIGVTALRM, &process_fatal_action, 0); |
| 1913 | #endif |
| 1914 | #ifdef SIGXFSZ |
| 1915 | sigaction (SIGXFSZ, &process_fatal_action, 0); |
| 1916 | #endif |
| 1917 | |
| 1918 | #ifdef SIGDANGER |
| 1919 | /* This just means available memory is getting low. */ |
| 1920 | emacs_sigaction_init (&action, deliver_danger_signal); |
| 1921 | sigaction (SIGDANGER, &action, 0); |
| 1922 | #endif |
| 1923 | |
| 1924 | /* AIX-specific signals. */ |
| 1925 | #ifdef SIGGRANT |
| 1926 | sigaction (SIGGRANT, &process_fatal_action, 0); |
| 1927 | #endif |
| 1928 | #ifdef SIGMIGRATE |
| 1929 | sigaction (SIGMIGRATE, &process_fatal_action, 0); |
| 1930 | #endif |
| 1931 | #ifdef SIGMSG |
| 1932 | sigaction (SIGMSG, &process_fatal_action, 0); |
| 1933 | #endif |
| 1934 | #ifdef SIGRETRACT |
| 1935 | sigaction (SIGRETRACT, &process_fatal_action, 0); |
| 1936 | #endif |
| 1937 | #ifdef SIGSAK |
| 1938 | sigaction (SIGSAK, &process_fatal_action, 0); |
| 1939 | #endif |
| 1940 | #ifdef SIGSOUND |
| 1941 | sigaction (SIGSOUND, &process_fatal_action, 0); |
| 1942 | #endif |
| 1943 | #ifdef SIGTALRM |
| 1944 | sigaction (SIGTALRM, &thread_fatal_action, 0); |
| 1945 | #endif |
| 1946 | } |
| 1947 | \f |
| 1948 | #ifndef HAVE_RANDOM |
| 1949 | #ifdef random |
| 1950 | #define HAVE_RANDOM |
| 1951 | #endif |
| 1952 | #endif |
| 1953 | |
| 1954 | /* Figure out how many bits the system's random number generator uses. |
| 1955 | `random' and `lrand48' are assumed to return 31 usable bits. |
| 1956 | BSD `rand' returns a 31 bit value but the low order bits are unusable; |
| 1957 | so we'll shift it and treat it like the 15-bit USG `rand'. */ |
| 1958 | |
| 1959 | #ifndef RAND_BITS |
| 1960 | # ifdef HAVE_RANDOM |
| 1961 | # define RAND_BITS 31 |
| 1962 | # else /* !HAVE_RANDOM */ |
| 1963 | # ifdef HAVE_LRAND48 |
| 1964 | # define RAND_BITS 31 |
| 1965 | # define random lrand48 |
| 1966 | # else /* !HAVE_LRAND48 */ |
| 1967 | # define RAND_BITS 15 |
| 1968 | # if RAND_MAX == 32767 |
| 1969 | # define random rand |
| 1970 | # else /* RAND_MAX != 32767 */ |
| 1971 | # if RAND_MAX == 2147483647 |
| 1972 | # define random() (rand () >> 16) |
| 1973 | # else /* RAND_MAX != 2147483647 */ |
| 1974 | # ifdef USG |
| 1975 | # define random rand |
| 1976 | # else |
| 1977 | # define random() (rand () >> 16) |
| 1978 | # endif /* !USG */ |
| 1979 | # endif /* RAND_MAX != 2147483647 */ |
| 1980 | # endif /* RAND_MAX != 32767 */ |
| 1981 | # endif /* !HAVE_LRAND48 */ |
| 1982 | # endif /* !HAVE_RANDOM */ |
| 1983 | #endif /* !RAND_BITS */ |
| 1984 | |
| 1985 | void |
| 1986 | seed_random (void *seed, ptrdiff_t seed_size) |
| 1987 | { |
| 1988 | #if defined HAVE_RANDOM || ! defined HAVE_LRAND48 |
| 1989 | unsigned int arg = 0; |
| 1990 | #else |
| 1991 | long int arg = 0; |
| 1992 | #endif |
| 1993 | unsigned char *argp = (unsigned char *) &arg; |
| 1994 | unsigned char *seedp = seed; |
| 1995 | ptrdiff_t i; |
| 1996 | for (i = 0; i < seed_size; i++) |
| 1997 | argp[i % sizeof arg] ^= seedp[i]; |
| 1998 | #ifdef HAVE_RANDOM |
| 1999 | srandom (arg); |
| 2000 | #else |
| 2001 | # ifdef HAVE_LRAND48 |
| 2002 | srand48 (arg); |
| 2003 | # else |
| 2004 | srand (arg); |
| 2005 | # endif |
| 2006 | #endif |
| 2007 | } |
| 2008 | |
| 2009 | void |
| 2010 | init_random (void) |
| 2011 | { |
| 2012 | struct timespec t = current_timespec (); |
| 2013 | uintmax_t v = getpid () ^ t.tv_sec ^ t.tv_nsec; |
| 2014 | seed_random (&v, sizeof v); |
| 2015 | } |
| 2016 | |
| 2017 | /* |
| 2018 | * Return a nonnegative random integer out of whatever we've got. |
| 2019 | * It contains enough bits to make a random (signed) Emacs fixnum. |
| 2020 | * This suffices even for a 64-bit architecture with a 15-bit rand. |
| 2021 | */ |
| 2022 | EMACS_INT |
| 2023 | get_random (void) |
| 2024 | { |
| 2025 | EMACS_UINT val = 0; |
| 2026 | int i; |
| 2027 | for (i = 0; i < (FIXNUM_BITS + RAND_BITS - 1) / RAND_BITS; i++) |
| 2028 | val = (random () ^ (val << RAND_BITS) |
| 2029 | ^ (val >> (BITS_PER_EMACS_INT - RAND_BITS))); |
| 2030 | val ^= val >> (BITS_PER_EMACS_INT - FIXNUM_BITS); |
| 2031 | return val & INTMASK; |
| 2032 | } |
| 2033 | |
| 2034 | #ifndef HAVE_SNPRINTF |
| 2035 | /* Approximate snprintf as best we can on ancient hosts that lack it. */ |
| 2036 | int |
| 2037 | snprintf (char *buf, size_t bufsize, char const *format, ...) |
| 2038 | { |
| 2039 | ptrdiff_t size = min (bufsize, PTRDIFF_MAX); |
| 2040 | ptrdiff_t nbytes = size - 1; |
| 2041 | va_list ap; |
| 2042 | |
| 2043 | if (size) |
| 2044 | { |
| 2045 | va_start (ap, format); |
| 2046 | nbytes = doprnt (buf, size, format, 0, ap); |
| 2047 | va_end (ap); |
| 2048 | } |
| 2049 | |
| 2050 | if (nbytes == size - 1) |
| 2051 | { |
| 2052 | /* Calculate the length of the string that would have been created |
| 2053 | had the buffer been large enough. */ |
| 2054 | char stackbuf[4000]; |
| 2055 | char *b = stackbuf; |
| 2056 | ptrdiff_t bsize = sizeof stackbuf; |
| 2057 | va_start (ap, format); |
| 2058 | nbytes = evxprintf (&b, &bsize, stackbuf, -1, format, ap); |
| 2059 | va_end (ap); |
| 2060 | if (b != stackbuf) |
| 2061 | xfree (b); |
| 2062 | } |
| 2063 | |
| 2064 | if (INT_MAX < nbytes) |
| 2065 | { |
| 2066 | #ifdef EOVERFLOW |
| 2067 | errno = EOVERFLOW; |
| 2068 | #else |
| 2069 | errno = EDOM; |
| 2070 | #endif |
| 2071 | return -1; |
| 2072 | } |
| 2073 | return nbytes; |
| 2074 | } |
| 2075 | #endif |
| 2076 | \f |
| 2077 | /* If a backtrace is available, output the top lines of it to stderr. |
| 2078 | Do not output more than BACKTRACE_LIMIT or BACKTRACE_LIMIT_MAX lines. |
| 2079 | This function may be called from a signal handler, so it should |
| 2080 | not invoke async-unsafe functions like malloc. */ |
| 2081 | void |
| 2082 | emacs_backtrace (int backtrace_limit) |
| 2083 | { |
| 2084 | void *main_backtrace_buffer[BACKTRACE_LIMIT_MAX + 1]; |
| 2085 | int bounded_limit = min (backtrace_limit, BACKTRACE_LIMIT_MAX); |
| 2086 | void *buffer; |
| 2087 | int npointers; |
| 2088 | |
| 2089 | if (thread_backtrace_npointers) |
| 2090 | { |
| 2091 | buffer = thread_backtrace_buffer; |
| 2092 | npointers = thread_backtrace_npointers; |
| 2093 | } |
| 2094 | else |
| 2095 | { |
| 2096 | buffer = main_backtrace_buffer; |
| 2097 | npointers = backtrace (buffer, bounded_limit + 1); |
| 2098 | } |
| 2099 | |
| 2100 | if (npointers) |
| 2101 | { |
| 2102 | emacs_write (STDERR_FILENO, "\nBacktrace:\n", 12); |
| 2103 | backtrace_symbols_fd (buffer, npointers, STDERR_FILENO); |
| 2104 | if (bounded_limit < npointers) |
| 2105 | emacs_write (STDERR_FILENO, "...\n", 4); |
| 2106 | } |
| 2107 | } |
| 2108 | \f |
| 2109 | #ifndef HAVE_NTGUI |
| 2110 | void |
| 2111 | emacs_abort (void) |
| 2112 | { |
| 2113 | terminate_due_to_signal (SIGABRT, 40); |
| 2114 | } |
| 2115 | #endif |
| 2116 | |
| 2117 | /* Open FILE for Emacs use, using open flags OFLAG and mode MODE. |
| 2118 | Arrange for subprograms to not inherit the file descriptor. |
| 2119 | Prefer a method that is multithread-safe, if available. |
| 2120 | Do not fail merely because the open was interrupted by a signal. |
| 2121 | Allow the user to quit. */ |
| 2122 | |
| 2123 | int |
| 2124 | emacs_open (const char *file, int oflags, int mode) |
| 2125 | { |
| 2126 | int fd; |
| 2127 | oflags |= O_CLOEXEC; |
| 2128 | while ((fd = open (file, oflags, mode)) < 0 && errno == EINTR) |
| 2129 | QUIT; |
| 2130 | if (! O_CLOEXEC && 0 <= fd) |
| 2131 | fcntl (fd, F_SETFD, FD_CLOEXEC); |
| 2132 | return fd; |
| 2133 | } |
| 2134 | |
| 2135 | /* Open FILE as a stream for Emacs use, with mode MODE. |
| 2136 | Act like emacs_open with respect to threads, signals, and quits. */ |
| 2137 | |
| 2138 | FILE * |
| 2139 | emacs_fopen (char const *file, char const *mode) |
| 2140 | { |
| 2141 | int fd, omode, oflags; |
| 2142 | int bflag = 0; |
| 2143 | char const *m = mode; |
| 2144 | |
| 2145 | switch (*m++) |
| 2146 | { |
| 2147 | case 'r': omode = O_RDONLY; oflags = 0; break; |
| 2148 | case 'w': omode = O_WRONLY; oflags = O_CREAT | O_TRUNC; break; |
| 2149 | case 'a': omode = O_WRONLY; oflags = O_CREAT | O_APPEND; break; |
| 2150 | default: emacs_abort (); |
| 2151 | } |
| 2152 | |
| 2153 | while (*m) |
| 2154 | switch (*m++) |
| 2155 | { |
| 2156 | case '+': omode = O_RDWR; break; |
| 2157 | case 'b': bflag = O_BINARY; break; |
| 2158 | case 't': bflag = O_TEXT; break; |
| 2159 | default: /* Ignore. */ break; |
| 2160 | } |
| 2161 | |
| 2162 | fd = emacs_open (file, omode | oflags | bflag, 0666); |
| 2163 | return fd < 0 ? 0 : fdopen (fd, mode); |
| 2164 | } |
| 2165 | |
| 2166 | /* Create a pipe for Emacs use. */ |
| 2167 | |
| 2168 | int |
| 2169 | emacs_pipe (int fd[2]) |
| 2170 | { |
| 2171 | #ifdef MSDOS |
| 2172 | return pipe (fd); |
| 2173 | #else /* !MSDOS */ |
| 2174 | int result = pipe2 (fd, O_CLOEXEC); |
| 2175 | if (! O_CLOEXEC && result == 0) |
| 2176 | { |
| 2177 | fcntl (fd[0], F_SETFD, FD_CLOEXEC); |
| 2178 | fcntl (fd[1], F_SETFD, FD_CLOEXEC); |
| 2179 | } |
| 2180 | return result; |
| 2181 | #endif /* !MSDOS */ |
| 2182 | } |
| 2183 | |
| 2184 | /* Approximate posix_close and POSIX_CLOSE_RESTART well enough for Emacs. |
| 2185 | For the background behind this mess, please see Austin Group defect 529 |
| 2186 | <http://austingroupbugs.net/view.php?id=529>. */ |
| 2187 | |
| 2188 | #ifndef POSIX_CLOSE_RESTART |
| 2189 | # define POSIX_CLOSE_RESTART 1 |
| 2190 | static int |
| 2191 | posix_close (int fd, int flag) |
| 2192 | { |
| 2193 | /* Only the POSIX_CLOSE_RESTART case is emulated. */ |
| 2194 | eassert (flag == POSIX_CLOSE_RESTART); |
| 2195 | |
| 2196 | /* Things are tricky if close (fd) returns -1 with errno == EINTR |
| 2197 | on a system that does not define POSIX_CLOSE_RESTART. |
| 2198 | |
| 2199 | In this case, in some systems (e.g., GNU/Linux, AIX) FD is |
| 2200 | closed, and retrying the close could inadvertently close a file |
| 2201 | descriptor allocated by some other thread. In other systems |
| 2202 | (e.g., HP/UX) FD is not closed. And in still other systems |
| 2203 | (e.g., OS X, Solaris), maybe FD is closed, maybe not, and in a |
| 2204 | multithreaded program there can be no way to tell. |
| 2205 | |
| 2206 | So, in this case, pretend that the close succeeded. This works |
| 2207 | well on systems like GNU/Linux that close FD. Although it may |
| 2208 | leak a file descriptor on other systems, the leak is unlikely and |
| 2209 | it's better to leak than to close a random victim. */ |
| 2210 | return close (fd) == 0 || errno == EINTR ? 0 : -1; |
| 2211 | } |
| 2212 | #endif |
| 2213 | |
| 2214 | /* Close FD, retrying if interrupted. If successful, return 0; |
| 2215 | otherwise, return -1 and set errno to a non-EINTR value. Consider |
| 2216 | an EINPROGRESS error to be successful, as that's merely a signal |
| 2217 | arriving. FD is always closed when this function returns, even |
| 2218 | when it returns -1. |
| 2219 | |
| 2220 | Do not call this function if FD is nonnegative and might already be closed, |
| 2221 | as that might close an innocent victim opened by some other thread. */ |
| 2222 | |
| 2223 | int |
| 2224 | emacs_close (int fd) |
| 2225 | { |
| 2226 | while (1) |
| 2227 | { |
| 2228 | int r = posix_close (fd, POSIX_CLOSE_RESTART); |
| 2229 | if (r == 0) |
| 2230 | return r; |
| 2231 | if (!POSIX_CLOSE_RESTART || errno != EINTR) |
| 2232 | { |
| 2233 | eassert (errno != EBADF || fd < 0); |
| 2234 | return errno == EINPROGRESS ? 0 : r; |
| 2235 | } |
| 2236 | } |
| 2237 | } |
| 2238 | |
| 2239 | /* Maximum number of bytes to read or write in a single system call. |
| 2240 | This works around a serious bug in Linux kernels before 2.6.16; see |
| 2241 | <https://bugzilla.redhat.com/show_bug.cgi?format=multiple&id=612839>. |
| 2242 | It's likely to work around similar bugs in other operating systems, so do it |
| 2243 | on all platforms. Round INT_MAX down to a page size, with the conservative |
| 2244 | assumption that page sizes are at most 2**18 bytes (any kernel with a |
| 2245 | page size larger than that shouldn't have the bug). */ |
| 2246 | #ifndef MAX_RW_COUNT |
| 2247 | #define MAX_RW_COUNT (INT_MAX >> 18 << 18) |
| 2248 | #endif |
| 2249 | |
| 2250 | /* Read from FILEDESC to a buffer BUF with size NBYTE, retrying if interrupted. |
| 2251 | Return the number of bytes read, which might be less than NBYTE. |
| 2252 | On error, set errno and return -1. */ |
| 2253 | ptrdiff_t |
| 2254 | emacs_read (int fildes, void *buf, ptrdiff_t nbyte) |
| 2255 | { |
| 2256 | ssize_t rtnval; |
| 2257 | |
| 2258 | /* There is no need to check against MAX_RW_COUNT, since no caller ever |
| 2259 | passes a size that large to emacs_read. */ |
| 2260 | |
| 2261 | while ((rtnval = read (fildes, buf, nbyte)) == -1 |
| 2262 | && (errno == EINTR)) |
| 2263 | QUIT; |
| 2264 | return (rtnval); |
| 2265 | } |
| 2266 | |
| 2267 | /* Write to FILEDES from a buffer BUF with size NBYTE, retrying if interrupted |
| 2268 | or if a partial write occurs. If interrupted, process pending |
| 2269 | signals if PROCESS SIGNALS. Return the number of bytes written, setting |
| 2270 | errno if this is less than NBYTE. */ |
| 2271 | static ptrdiff_t |
| 2272 | emacs_full_write (int fildes, char const *buf, ptrdiff_t nbyte, |
| 2273 | bool process_signals) |
| 2274 | { |
| 2275 | ptrdiff_t bytes_written = 0; |
| 2276 | |
| 2277 | while (nbyte > 0) |
| 2278 | { |
| 2279 | ssize_t n = write (fildes, buf, min (nbyte, MAX_RW_COUNT)); |
| 2280 | |
| 2281 | if (n < 0) |
| 2282 | { |
| 2283 | if (errno == EINTR) |
| 2284 | { |
| 2285 | /* I originally used `QUIT' but that might causes files to |
| 2286 | be truncated if you hit C-g in the middle of it. --Stef */ |
| 2287 | if (process_signals && pending_signals) |
| 2288 | process_pending_signals (); |
| 2289 | continue; |
| 2290 | } |
| 2291 | else |
| 2292 | break; |
| 2293 | } |
| 2294 | |
| 2295 | buf += n; |
| 2296 | nbyte -= n; |
| 2297 | bytes_written += n; |
| 2298 | } |
| 2299 | |
| 2300 | return bytes_written; |
| 2301 | } |
| 2302 | |
| 2303 | /* Write to FILEDES from a buffer BUF with size NBYTE, retrying if |
| 2304 | interrupted or if a partial write occurs. Return the number of |
| 2305 | bytes written, setting errno if this is less than NBYTE. */ |
| 2306 | ptrdiff_t |
| 2307 | emacs_write (int fildes, void const *buf, ptrdiff_t nbyte) |
| 2308 | { |
| 2309 | return emacs_full_write (fildes, buf, nbyte, 0); |
| 2310 | } |
| 2311 | |
| 2312 | /* Like emacs_write, but also process pending signals if interrupted. */ |
| 2313 | ptrdiff_t |
| 2314 | emacs_write_sig (int fildes, void const *buf, ptrdiff_t nbyte) |
| 2315 | { |
| 2316 | return emacs_full_write (fildes, buf, nbyte, 1); |
| 2317 | } |
| 2318 | |
| 2319 | /* Write a diagnostic to standard error that contains MESSAGE and a |
| 2320 | string derived from errno. Preserve errno. Do not buffer stderr. |
| 2321 | Do not process pending signals if interrupted. */ |
| 2322 | void |
| 2323 | emacs_perror (char const *message) |
| 2324 | { |
| 2325 | int err = errno; |
| 2326 | char const *error_string = strerror (err); |
| 2327 | char const *command = (initial_argv && initial_argv[0] |
| 2328 | ? initial_argv[0] : "emacs"); |
| 2329 | /* Write it out all at once, if it's short; this is less likely to |
| 2330 | be interleaved with other output. */ |
| 2331 | char buf[BUFSIZ]; |
| 2332 | int nbytes = snprintf (buf, sizeof buf, "%s: %s: %s\n", |
| 2333 | command, message, error_string); |
| 2334 | if (0 <= nbytes && nbytes < BUFSIZ) |
| 2335 | emacs_write (STDERR_FILENO, buf, nbytes); |
| 2336 | else |
| 2337 | { |
| 2338 | emacs_write (STDERR_FILENO, command, strlen (command)); |
| 2339 | emacs_write (STDERR_FILENO, ": ", 2); |
| 2340 | emacs_write (STDERR_FILENO, message, strlen (message)); |
| 2341 | emacs_write (STDERR_FILENO, ": ", 2); |
| 2342 | emacs_write (STDERR_FILENO, error_string, strlen (error_string)); |
| 2343 | emacs_write (STDERR_FILENO, "\n", 1); |
| 2344 | } |
| 2345 | errno = err; |
| 2346 | } |
| 2347 | \f |
| 2348 | /* Return a struct timeval that is roughly equivalent to T. |
| 2349 | Use the least timeval not less than T. |
| 2350 | Return an extremal value if the result would overflow. */ |
| 2351 | struct timeval |
| 2352 | make_timeval (struct timespec t) |
| 2353 | { |
| 2354 | struct timeval tv; |
| 2355 | tv.tv_sec = t.tv_sec; |
| 2356 | tv.tv_usec = t.tv_nsec / 1000; |
| 2357 | |
| 2358 | if (t.tv_nsec % 1000 != 0) |
| 2359 | { |
| 2360 | if (tv.tv_usec < 999999) |
| 2361 | tv.tv_usec++; |
| 2362 | else if (tv.tv_sec < TYPE_MAXIMUM (time_t)) |
| 2363 | { |
| 2364 | tv.tv_sec++; |
| 2365 | tv.tv_usec = 0; |
| 2366 | } |
| 2367 | } |
| 2368 | |
| 2369 | return tv; |
| 2370 | } |
| 2371 | |
| 2372 | /* Set the access and modification time stamps of FD (a.k.a. FILE) to be |
| 2373 | ATIME and MTIME, respectively. |
| 2374 | FD must be either negative -- in which case it is ignored -- |
| 2375 | or a file descriptor that is open on FILE. |
| 2376 | If FD is nonnegative, then FILE can be NULL. */ |
| 2377 | int |
| 2378 | set_file_times (int fd, const char *filename, |
| 2379 | struct timespec atime, struct timespec mtime) |
| 2380 | { |
| 2381 | struct timespec timespec[2]; |
| 2382 | timespec[0] = atime; |
| 2383 | timespec[1] = mtime; |
| 2384 | return fdutimens (fd, filename, timespec); |
| 2385 | } |
| 2386 | \f |
| 2387 | /* Like strsignal, except async-signal-safe, and this function typically |
| 2388 | returns a string in the C locale rather than the current locale. */ |
| 2389 | char const * |
| 2390 | safe_strsignal (int code) |
| 2391 | { |
| 2392 | char const *signame = 0; |
| 2393 | |
| 2394 | if (0 <= code && code < sys_siglist_entries) |
| 2395 | signame = sys_siglist[code]; |
| 2396 | if (! signame) |
| 2397 | signame = "Unknown signal"; |
| 2398 | |
| 2399 | return signame; |
| 2400 | } |
| 2401 | \f |
| 2402 | #ifndef DOS_NT |
| 2403 | /* For make-serial-process */ |
| 2404 | int |
| 2405 | serial_open (Lisp_Object port) |
| 2406 | { |
| 2407 | int fd = emacs_open (SSDATA (port), O_RDWR | O_NOCTTY | O_NONBLOCK, 0); |
| 2408 | if (fd < 0) |
| 2409 | report_file_error ("Opening serial port", port); |
| 2410 | #ifdef TIOCEXCL |
| 2411 | ioctl (fd, TIOCEXCL, (char *) 0); |
| 2412 | #endif |
| 2413 | |
| 2414 | return fd; |
| 2415 | } |
| 2416 | |
| 2417 | #if !defined (HAVE_CFMAKERAW) |
| 2418 | /* Workaround for targets which are missing cfmakeraw. */ |
| 2419 | /* Pasted from man page. */ |
| 2420 | static void |
| 2421 | cfmakeraw (struct termios *termios_p) |
| 2422 | { |
| 2423 | termios_p->c_iflag &= ~(IGNBRK|BRKINT|PARMRK|ISTRIP|INLCR|IGNCR|ICRNL|IXON); |
| 2424 | termios_p->c_oflag &= ~OPOST; |
| 2425 | termios_p->c_lflag &= ~(ECHO|ECHONL|ICANON|ISIG|IEXTEN); |
| 2426 | termios_p->c_cflag &= ~(CSIZE|PARENB); |
| 2427 | termios_p->c_cflag |= CS8; |
| 2428 | } |
| 2429 | #endif /* !defined (HAVE_CFMAKERAW */ |
| 2430 | |
| 2431 | #if !defined (HAVE_CFSETSPEED) |
| 2432 | /* Workaround for targets which are missing cfsetspeed. */ |
| 2433 | static int |
| 2434 | cfsetspeed (struct termios *termios_p, speed_t vitesse) |
| 2435 | { |
| 2436 | return (cfsetispeed (termios_p, vitesse) |
| 2437 | + cfsetospeed (termios_p, vitesse)); |
| 2438 | } |
| 2439 | #endif |
| 2440 | |
| 2441 | /* For serial-process-configure */ |
| 2442 | void |
| 2443 | serial_configure (struct Lisp_Process *p, |
| 2444 | Lisp_Object contact) |
| 2445 | { |
| 2446 | Lisp_Object childp2 = Qnil; |
| 2447 | Lisp_Object tem = Qnil; |
| 2448 | struct termios attr; |
| 2449 | int err; |
| 2450 | char summary[4] = "???"; /* This usually becomes "8N1". */ |
| 2451 | |
| 2452 | childp2 = Fcopy_sequence (p->childp); |
| 2453 | |
| 2454 | /* Read port attributes and prepare default configuration. */ |
| 2455 | err = tcgetattr (p->outfd, &attr); |
| 2456 | if (err != 0) |
| 2457 | report_file_error ("Failed tcgetattr", Qnil); |
| 2458 | cfmakeraw (&attr); |
| 2459 | #if defined (CLOCAL) |
| 2460 | attr.c_cflag |= CLOCAL; |
| 2461 | #endif |
| 2462 | #if defined (CREAD) |
| 2463 | attr.c_cflag |= CREAD; |
| 2464 | #endif |
| 2465 | |
| 2466 | /* Configure speed. */ |
| 2467 | if (!NILP (Fplist_member (contact, QCspeed))) |
| 2468 | tem = Fplist_get (contact, QCspeed); |
| 2469 | else |
| 2470 | tem = Fplist_get (p->childp, QCspeed); |
| 2471 | CHECK_NUMBER (tem); |
| 2472 | err = cfsetspeed (&attr, XINT (tem)); |
| 2473 | if (err != 0) |
| 2474 | report_file_error ("Failed cfsetspeed", tem); |
| 2475 | childp2 = Fplist_put (childp2, QCspeed, tem); |
| 2476 | |
| 2477 | /* Configure bytesize. */ |
| 2478 | if (!NILP (Fplist_member (contact, QCbytesize))) |
| 2479 | tem = Fplist_get (contact, QCbytesize); |
| 2480 | else |
| 2481 | tem = Fplist_get (p->childp, QCbytesize); |
| 2482 | if (NILP (tem)) |
| 2483 | tem = make_number (8); |
| 2484 | CHECK_NUMBER (tem); |
| 2485 | if (XINT (tem) != 7 && XINT (tem) != 8) |
| 2486 | error (":bytesize must be nil (8), 7, or 8"); |
| 2487 | summary[0] = XINT (tem) + '0'; |
| 2488 | #if defined (CSIZE) && defined (CS7) && defined (CS8) |
| 2489 | attr.c_cflag &= ~CSIZE; |
| 2490 | attr.c_cflag |= ((XINT (tem) == 7) ? CS7 : CS8); |
| 2491 | #else |
| 2492 | /* Don't error on bytesize 8, which should be set by cfmakeraw. */ |
| 2493 | if (XINT (tem) != 8) |
| 2494 | error ("Bytesize cannot be changed"); |
| 2495 | #endif |
| 2496 | childp2 = Fplist_put (childp2, QCbytesize, tem); |
| 2497 | |
| 2498 | /* Configure parity. */ |
| 2499 | if (!NILP (Fplist_member (contact, QCparity))) |
| 2500 | tem = Fplist_get (contact, QCparity); |
| 2501 | else |
| 2502 | tem = Fplist_get (p->childp, QCparity); |
| 2503 | if (!NILP (tem) && !EQ (tem, Qeven) && !EQ (tem, Qodd)) |
| 2504 | error (":parity must be nil (no parity), `even', or `odd'"); |
| 2505 | #if defined (PARENB) && defined (PARODD) && defined (IGNPAR) && defined (INPCK) |
| 2506 | attr.c_cflag &= ~(PARENB | PARODD); |
| 2507 | attr.c_iflag &= ~(IGNPAR | INPCK); |
| 2508 | if (NILP (tem)) |
| 2509 | { |
| 2510 | summary[1] = 'N'; |
| 2511 | } |
| 2512 | else if (EQ (tem, Qeven)) |
| 2513 | { |
| 2514 | summary[1] = 'E'; |
| 2515 | attr.c_cflag |= PARENB; |
| 2516 | attr.c_iflag |= (IGNPAR | INPCK); |
| 2517 | } |
| 2518 | else if (EQ (tem, Qodd)) |
| 2519 | { |
| 2520 | summary[1] = 'O'; |
| 2521 | attr.c_cflag |= (PARENB | PARODD); |
| 2522 | attr.c_iflag |= (IGNPAR | INPCK); |
| 2523 | } |
| 2524 | #else |
| 2525 | /* Don't error on no parity, which should be set by cfmakeraw. */ |
| 2526 | if (!NILP (tem)) |
| 2527 | error ("Parity cannot be configured"); |
| 2528 | #endif |
| 2529 | childp2 = Fplist_put (childp2, QCparity, tem); |
| 2530 | |
| 2531 | /* Configure stopbits. */ |
| 2532 | if (!NILP (Fplist_member (contact, QCstopbits))) |
| 2533 | tem = Fplist_get (contact, QCstopbits); |
| 2534 | else |
| 2535 | tem = Fplist_get (p->childp, QCstopbits); |
| 2536 | if (NILP (tem)) |
| 2537 | tem = make_number (1); |
| 2538 | CHECK_NUMBER (tem); |
| 2539 | if (XINT (tem) != 1 && XINT (tem) != 2) |
| 2540 | error (":stopbits must be nil (1 stopbit), 1, or 2"); |
| 2541 | summary[2] = XINT (tem) + '0'; |
| 2542 | #if defined (CSTOPB) |
| 2543 | attr.c_cflag &= ~CSTOPB; |
| 2544 | if (XINT (tem) == 2) |
| 2545 | attr.c_cflag |= CSTOPB; |
| 2546 | #else |
| 2547 | /* Don't error on 1 stopbit, which should be set by cfmakeraw. */ |
| 2548 | if (XINT (tem) != 1) |
| 2549 | error ("Stopbits cannot be configured"); |
| 2550 | #endif |
| 2551 | childp2 = Fplist_put (childp2, QCstopbits, tem); |
| 2552 | |
| 2553 | /* Configure flowcontrol. */ |
| 2554 | if (!NILP (Fplist_member (contact, QCflowcontrol))) |
| 2555 | tem = Fplist_get (contact, QCflowcontrol); |
| 2556 | else |
| 2557 | tem = Fplist_get (p->childp, QCflowcontrol); |
| 2558 | if (!NILP (tem) && !EQ (tem, Qhw) && !EQ (tem, Qsw)) |
| 2559 | error (":flowcontrol must be nil (no flowcontrol), `hw', or `sw'"); |
| 2560 | #if defined (CRTSCTS) |
| 2561 | attr.c_cflag &= ~CRTSCTS; |
| 2562 | #endif |
| 2563 | #if defined (CNEW_RTSCTS) |
| 2564 | attr.c_cflag &= ~CNEW_RTSCTS; |
| 2565 | #endif |
| 2566 | #if defined (IXON) && defined (IXOFF) |
| 2567 | attr.c_iflag &= ~(IXON | IXOFF); |
| 2568 | #endif |
| 2569 | if (NILP (tem)) |
| 2570 | { |
| 2571 | /* Already configured. */ |
| 2572 | } |
| 2573 | else if (EQ (tem, Qhw)) |
| 2574 | { |
| 2575 | #if defined (CRTSCTS) |
| 2576 | attr.c_cflag |= CRTSCTS; |
| 2577 | #elif defined (CNEW_RTSCTS) |
| 2578 | attr.c_cflag |= CNEW_RTSCTS; |
| 2579 | #else |
| 2580 | error ("Hardware flowcontrol (RTS/CTS) not supported"); |
| 2581 | #endif |
| 2582 | } |
| 2583 | else if (EQ (tem, Qsw)) |
| 2584 | { |
| 2585 | #if defined (IXON) && defined (IXOFF) |
| 2586 | attr.c_iflag |= (IXON | IXOFF); |
| 2587 | #else |
| 2588 | error ("Software flowcontrol (XON/XOFF) not supported"); |
| 2589 | #endif |
| 2590 | } |
| 2591 | childp2 = Fplist_put (childp2, QCflowcontrol, tem); |
| 2592 | |
| 2593 | /* Activate configuration. */ |
| 2594 | err = tcsetattr (p->outfd, TCSANOW, &attr); |
| 2595 | if (err != 0) |
| 2596 | report_file_error ("Failed tcsetattr", Qnil); |
| 2597 | |
| 2598 | childp2 = Fplist_put (childp2, QCsummary, build_string (summary)); |
| 2599 | pset_childp (p, childp2); |
| 2600 | } |
| 2601 | #endif /* not DOS_NT */ |
| 2602 | \f |
| 2603 | /* System depended enumeration of and access to system processes a-la ps(1). */ |
| 2604 | |
| 2605 | #ifdef HAVE_PROCFS |
| 2606 | |
| 2607 | /* Process enumeration and access via /proc. */ |
| 2608 | |
| 2609 | Lisp_Object |
| 2610 | list_system_processes (void) |
| 2611 | { |
| 2612 | Lisp_Object procdir, match, proclist, next; |
| 2613 | struct gcpro gcpro1, gcpro2; |
| 2614 | register Lisp_Object tail; |
| 2615 | |
| 2616 | GCPRO2 (procdir, match); |
| 2617 | /* For every process on the system, there's a directory in the |
| 2618 | "/proc" pseudo-directory whose name is the numeric ID of that |
| 2619 | process. */ |
| 2620 | procdir = build_string ("/proc"); |
| 2621 | match = build_string ("[0-9]+"); |
| 2622 | proclist = directory_files_internal (procdir, Qnil, match, Qt, 0, Qnil); |
| 2623 | |
| 2624 | /* `proclist' gives process IDs as strings. Destructively convert |
| 2625 | each string into a number. */ |
| 2626 | for (tail = proclist; CONSP (tail); tail = next) |
| 2627 | { |
| 2628 | next = XCDR (tail); |
| 2629 | XSETCAR (tail, Fstring_to_number (XCAR (tail), Qnil)); |
| 2630 | } |
| 2631 | UNGCPRO; |
| 2632 | |
| 2633 | /* directory_files_internal returns the files in reverse order; undo |
| 2634 | that. */ |
| 2635 | proclist = Fnreverse (proclist); |
| 2636 | return proclist; |
| 2637 | } |
| 2638 | |
| 2639 | #elif defined DARWIN_OS || defined __FreeBSD__ |
| 2640 | |
| 2641 | Lisp_Object |
| 2642 | list_system_processes (void) |
| 2643 | { |
| 2644 | #ifdef DARWIN_OS |
| 2645 | int mib[] = {CTL_KERN, KERN_PROC, KERN_PROC_ALL}; |
| 2646 | #else |
| 2647 | int mib[] = {CTL_KERN, KERN_PROC, KERN_PROC_PROC}; |
| 2648 | #endif |
| 2649 | size_t len; |
| 2650 | struct kinfo_proc *procs; |
| 2651 | size_t i; |
| 2652 | |
| 2653 | struct gcpro gcpro1; |
| 2654 | Lisp_Object proclist = Qnil; |
| 2655 | |
| 2656 | if (sysctl (mib, 3, NULL, &len, NULL, 0) != 0) |
| 2657 | return proclist; |
| 2658 | |
| 2659 | procs = xmalloc (len); |
| 2660 | if (sysctl (mib, 3, procs, &len, NULL, 0) != 0) |
| 2661 | { |
| 2662 | xfree (procs); |
| 2663 | return proclist; |
| 2664 | } |
| 2665 | |
| 2666 | GCPRO1 (proclist); |
| 2667 | len /= sizeof (struct kinfo_proc); |
| 2668 | for (i = 0; i < len; i++) |
| 2669 | { |
| 2670 | #ifdef DARWIN_OS |
| 2671 | proclist = Fcons (make_fixnum_or_float (procs[i].kp_proc.p_pid), proclist); |
| 2672 | #else |
| 2673 | proclist = Fcons (make_fixnum_or_float (procs[i].ki_pid), proclist); |
| 2674 | #endif |
| 2675 | } |
| 2676 | UNGCPRO; |
| 2677 | |
| 2678 | xfree (procs); |
| 2679 | |
| 2680 | return proclist; |
| 2681 | } |
| 2682 | |
| 2683 | /* The WINDOWSNT implementation is in w32.c. |
| 2684 | The MSDOS implementation is in dosfns.c. */ |
| 2685 | #elif !defined (WINDOWSNT) && !defined (MSDOS) |
| 2686 | |
| 2687 | Lisp_Object |
| 2688 | list_system_processes (void) |
| 2689 | { |
| 2690 | return Qnil; |
| 2691 | } |
| 2692 | |
| 2693 | #endif /* !defined (WINDOWSNT) */ |
| 2694 | |
| 2695 | #if defined GNU_LINUX && defined HAVE_LONG_LONG_INT |
| 2696 | static struct timespec |
| 2697 | time_from_jiffies (unsigned long long tval, long hz) |
| 2698 | { |
| 2699 | unsigned long long s = tval / hz; |
| 2700 | unsigned long long frac = tval % hz; |
| 2701 | int ns; |
| 2702 | |
| 2703 | if (TYPE_MAXIMUM (time_t) < s) |
| 2704 | time_overflow (); |
| 2705 | if (LONG_MAX - 1 <= ULLONG_MAX / TIMESPEC_RESOLUTION |
| 2706 | || frac <= ULLONG_MAX / TIMESPEC_RESOLUTION) |
| 2707 | ns = frac * TIMESPEC_RESOLUTION / hz; |
| 2708 | else |
| 2709 | { |
| 2710 | /* This is reachable only in the unlikely case that HZ * HZ |
| 2711 | exceeds ULLONG_MAX. It calculates an approximation that is |
| 2712 | guaranteed to be in range. */ |
| 2713 | long hz_per_ns = (hz / TIMESPEC_RESOLUTION |
| 2714 | + (hz % TIMESPEC_RESOLUTION != 0)); |
| 2715 | ns = frac / hz_per_ns; |
| 2716 | } |
| 2717 | |
| 2718 | return make_timespec (s, ns); |
| 2719 | } |
| 2720 | |
| 2721 | static Lisp_Object |
| 2722 | ltime_from_jiffies (unsigned long long tval, long hz) |
| 2723 | { |
| 2724 | struct timespec t = time_from_jiffies (tval, hz); |
| 2725 | return make_lisp_time (t); |
| 2726 | } |
| 2727 | |
| 2728 | static struct timespec |
| 2729 | get_up_time (void) |
| 2730 | { |
| 2731 | FILE *fup; |
| 2732 | struct timespec up = make_timespec (0, 0); |
| 2733 | |
| 2734 | block_input (); |
| 2735 | fup = emacs_fopen ("/proc/uptime", "r"); |
| 2736 | |
| 2737 | if (fup) |
| 2738 | { |
| 2739 | unsigned long long upsec, upfrac, idlesec, idlefrac; |
| 2740 | int upfrac_start, upfrac_end, idlefrac_start, idlefrac_end; |
| 2741 | |
| 2742 | if (fscanf (fup, "%llu.%n%llu%n %llu.%n%llu%n", |
| 2743 | &upsec, &upfrac_start, &upfrac, &upfrac_end, |
| 2744 | &idlesec, &idlefrac_start, &idlefrac, &idlefrac_end) |
| 2745 | == 4) |
| 2746 | { |
| 2747 | if (TYPE_MAXIMUM (time_t) < upsec) |
| 2748 | { |
| 2749 | upsec = TYPE_MAXIMUM (time_t); |
| 2750 | upfrac = TIMESPEC_RESOLUTION - 1; |
| 2751 | } |
| 2752 | else |
| 2753 | { |
| 2754 | int upfraclen = upfrac_end - upfrac_start; |
| 2755 | for (; upfraclen < LOG10_TIMESPEC_RESOLUTION; upfraclen++) |
| 2756 | upfrac *= 10; |
| 2757 | for (; LOG10_TIMESPEC_RESOLUTION < upfraclen; upfraclen--) |
| 2758 | upfrac /= 10; |
| 2759 | upfrac = min (upfrac, TIMESPEC_RESOLUTION - 1); |
| 2760 | } |
| 2761 | up = make_timespec (upsec, upfrac); |
| 2762 | } |
| 2763 | fclose (fup); |
| 2764 | } |
| 2765 | unblock_input (); |
| 2766 | |
| 2767 | return up; |
| 2768 | } |
| 2769 | |
| 2770 | #define MAJOR(d) (((unsigned)(d) >> 8) & 0xfff) |
| 2771 | #define MINOR(d) (((unsigned)(d) & 0xff) | (((unsigned)(d) & 0xfff00000) >> 12)) |
| 2772 | |
| 2773 | static Lisp_Object |
| 2774 | procfs_ttyname (int rdev) |
| 2775 | { |
| 2776 | FILE *fdev; |
| 2777 | char name[PATH_MAX]; |
| 2778 | |
| 2779 | block_input (); |
| 2780 | fdev = emacs_fopen ("/proc/tty/drivers", "r"); |
| 2781 | name[0] = 0; |
| 2782 | |
| 2783 | if (fdev) |
| 2784 | { |
| 2785 | unsigned major; |
| 2786 | unsigned long minor_beg, minor_end; |
| 2787 | char minor[25]; /* 2 32-bit numbers + dash */ |
| 2788 | char *endp; |
| 2789 | |
| 2790 | for (; !feof (fdev) && !ferror (fdev); name[0] = 0) |
| 2791 | { |
| 2792 | if (fscanf (fdev, "%*s %s %u %s %*s\n", name, &major, minor) >= 3 |
| 2793 | && major == MAJOR (rdev)) |
| 2794 | { |
| 2795 | minor_beg = strtoul (minor, &endp, 0); |
| 2796 | if (*endp == '\0') |
| 2797 | minor_end = minor_beg; |
| 2798 | else if (*endp == '-') |
| 2799 | minor_end = strtoul (endp + 1, &endp, 0); |
| 2800 | else |
| 2801 | continue; |
| 2802 | |
| 2803 | if (MINOR (rdev) >= minor_beg && MINOR (rdev) <= minor_end) |
| 2804 | { |
| 2805 | sprintf (name + strlen (name), "%u", MINOR (rdev)); |
| 2806 | break; |
| 2807 | } |
| 2808 | } |
| 2809 | } |
| 2810 | fclose (fdev); |
| 2811 | } |
| 2812 | unblock_input (); |
| 2813 | return build_string (name); |
| 2814 | } |
| 2815 | |
| 2816 | static uintmax_t |
| 2817 | procfs_get_total_memory (void) |
| 2818 | { |
| 2819 | FILE *fmem; |
| 2820 | uintmax_t retval = 2 * 1024 * 1024; /* default: 2 GiB */ |
| 2821 | int c; |
| 2822 | |
| 2823 | block_input (); |
| 2824 | fmem = emacs_fopen ("/proc/meminfo", "r"); |
| 2825 | |
| 2826 | if (fmem) |
| 2827 | { |
| 2828 | uintmax_t entry_value; |
| 2829 | bool done; |
| 2830 | |
| 2831 | do |
| 2832 | switch (fscanf (fmem, "MemTotal: %"SCNuMAX, &entry_value)) |
| 2833 | { |
| 2834 | case 1: |
| 2835 | retval = entry_value; |
| 2836 | done = 1; |
| 2837 | break; |
| 2838 | |
| 2839 | case 0: |
| 2840 | while ((c = getc (fmem)) != EOF && c != '\n') |
| 2841 | continue; |
| 2842 | done = c == EOF; |
| 2843 | break; |
| 2844 | |
| 2845 | default: |
| 2846 | done = 1; |
| 2847 | break; |
| 2848 | } |
| 2849 | while (!done); |
| 2850 | |
| 2851 | fclose (fmem); |
| 2852 | } |
| 2853 | unblock_input (); |
| 2854 | return retval; |
| 2855 | } |
| 2856 | |
| 2857 | Lisp_Object |
| 2858 | system_process_attributes (Lisp_Object pid) |
| 2859 | { |
| 2860 | char procfn[PATH_MAX], fn[PATH_MAX]; |
| 2861 | struct stat st; |
| 2862 | struct passwd *pw; |
| 2863 | struct group *gr; |
| 2864 | long clocks_per_sec; |
| 2865 | char *procfn_end; |
| 2866 | char procbuf[1025], *p, *q; |
| 2867 | int fd; |
| 2868 | ssize_t nread; |
| 2869 | static char const default_cmd[] = "???"; |
| 2870 | const char *cmd = default_cmd; |
| 2871 | int cmdsize = sizeof default_cmd - 1; |
| 2872 | char *cmdline = NULL; |
| 2873 | ptrdiff_t cmdline_size; |
| 2874 | char c; |
| 2875 | printmax_t proc_id; |
| 2876 | int ppid, pgrp, sess, tty, tpgid, thcount; |
| 2877 | uid_t uid; |
| 2878 | gid_t gid; |
| 2879 | unsigned long long u_time, s_time, cutime, cstime, start; |
| 2880 | long priority, niceness, rss; |
| 2881 | unsigned long minflt, majflt, cminflt, cmajflt, vsize; |
| 2882 | struct timespec tnow, tstart, tboot, telapsed, us_time; |
| 2883 | double pcpu, pmem; |
| 2884 | Lisp_Object attrs = Qnil; |
| 2885 | Lisp_Object cmd_str, decoded_cmd; |
| 2886 | ptrdiff_t count; |
| 2887 | struct gcpro gcpro1, gcpro2; |
| 2888 | |
| 2889 | CHECK_NUMBER_OR_FLOAT (pid); |
| 2890 | CONS_TO_INTEGER (pid, pid_t, proc_id); |
| 2891 | sprintf (procfn, "/proc/%"pMd, proc_id); |
| 2892 | if (stat (procfn, &st) < 0) |
| 2893 | return attrs; |
| 2894 | |
| 2895 | GCPRO2 (attrs, decoded_cmd); |
| 2896 | |
| 2897 | /* euid egid */ |
| 2898 | uid = st.st_uid; |
| 2899 | attrs = Fcons (Fcons (Qeuid, make_fixnum_or_float (uid)), attrs); |
| 2900 | block_input (); |
| 2901 | pw = getpwuid (uid); |
| 2902 | unblock_input (); |
| 2903 | if (pw) |
| 2904 | attrs = Fcons (Fcons (Quser, build_string (pw->pw_name)), attrs); |
| 2905 | |
| 2906 | gid = st.st_gid; |
| 2907 | attrs = Fcons (Fcons (Qegid, make_fixnum_or_float (gid)), attrs); |
| 2908 | block_input (); |
| 2909 | gr = getgrgid (gid); |
| 2910 | unblock_input (); |
| 2911 | if (gr) |
| 2912 | attrs = Fcons (Fcons (Qgroup, build_string (gr->gr_name)), attrs); |
| 2913 | |
| 2914 | dynwind_begin (); |
| 2915 | strcpy (fn, procfn); |
| 2916 | procfn_end = fn + strlen (fn); |
| 2917 | strcpy (procfn_end, "/stat"); |
| 2918 | fd = emacs_open (fn, O_RDONLY, 0); |
| 2919 | if (fd < 0) |
| 2920 | nread = 0; |
| 2921 | else |
| 2922 | { |
| 2923 | record_unwind_protect_int (close_file_unwind, fd); |
| 2924 | nread = emacs_read (fd, procbuf, sizeof procbuf - 1); |
| 2925 | } |
| 2926 | if (0 < nread) |
| 2927 | { |
| 2928 | procbuf[nread] = '\0'; |
| 2929 | p = procbuf; |
| 2930 | |
| 2931 | p = strchr (p, '('); |
| 2932 | if (p != NULL) |
| 2933 | { |
| 2934 | q = strrchr (p + 1, ')'); |
| 2935 | /* comm */ |
| 2936 | if (q != NULL) |
| 2937 | { |
| 2938 | cmd = p + 1; |
| 2939 | cmdsize = q - cmd; |
| 2940 | } |
| 2941 | } |
| 2942 | else |
| 2943 | q = NULL; |
| 2944 | /* Command name is encoded in locale-coding-system; decode it. */ |
| 2945 | cmd_str = make_unibyte_string (cmd, cmdsize); |
| 2946 | decoded_cmd = code_convert_string_norecord (cmd_str, |
| 2947 | Vlocale_coding_system, 0); |
| 2948 | attrs = Fcons (Fcons (Qcomm, decoded_cmd), attrs); |
| 2949 | |
| 2950 | /* state ppid pgrp sess tty tpgid . minflt cminflt majflt cmajflt |
| 2951 | utime stime cutime cstime priority nice thcount . start vsize rss */ |
| 2952 | if (q |
| 2953 | && (sscanf (q + 2, ("%c %d %d %d %d %d %*u %lu %lu %lu %lu " |
| 2954 | "%Lu %Lu %Lu %Lu %ld %ld %d %*d %Lu %lu %ld"), |
| 2955 | &c, &ppid, &pgrp, &sess, &tty, &tpgid, |
| 2956 | &minflt, &cminflt, &majflt, &cmajflt, |
| 2957 | &u_time, &s_time, &cutime, &cstime, |
| 2958 | &priority, &niceness, &thcount, &start, &vsize, &rss) |
| 2959 | == 20)) |
| 2960 | { |
| 2961 | char state_str[2]; |
| 2962 | state_str[0] = c; |
| 2963 | state_str[1] = '\0'; |
| 2964 | attrs = Fcons (Fcons (Qstate, build_string (state_str)), attrs); |
| 2965 | attrs = Fcons (Fcons (Qppid, make_fixnum_or_float (ppid)), attrs); |
| 2966 | attrs = Fcons (Fcons (Qpgrp, make_fixnum_or_float (pgrp)), attrs); |
| 2967 | attrs = Fcons (Fcons (Qsess, make_fixnum_or_float (sess)), attrs); |
| 2968 | attrs = Fcons (Fcons (Qttname, procfs_ttyname (tty)), attrs); |
| 2969 | attrs = Fcons (Fcons (Qtpgid, make_fixnum_or_float (tpgid)), attrs); |
| 2970 | attrs = Fcons (Fcons (Qminflt, make_fixnum_or_float (minflt)), attrs); |
| 2971 | attrs = Fcons (Fcons (Qmajflt, make_fixnum_or_float (majflt)), attrs); |
| 2972 | attrs = Fcons (Fcons (Qcminflt, make_fixnum_or_float (cminflt)), |
| 2973 | attrs); |
| 2974 | attrs = Fcons (Fcons (Qcmajflt, make_fixnum_or_float (cmajflt)), |
| 2975 | attrs); |
| 2976 | clocks_per_sec = sysconf (_SC_CLK_TCK); |
| 2977 | if (clocks_per_sec < 0) |
| 2978 | clocks_per_sec = 100; |
| 2979 | attrs = Fcons (Fcons (Qutime, |
| 2980 | ltime_from_jiffies (u_time, clocks_per_sec)), |
| 2981 | attrs); |
| 2982 | attrs = Fcons (Fcons (Qstime, |
| 2983 | ltime_from_jiffies (s_time, clocks_per_sec)), |
| 2984 | attrs); |
| 2985 | attrs = Fcons (Fcons (Qtime, |
| 2986 | ltime_from_jiffies (s_time + u_time, |
| 2987 | clocks_per_sec)), |
| 2988 | attrs); |
| 2989 | attrs = Fcons (Fcons (Qcutime, |
| 2990 | ltime_from_jiffies (cutime, clocks_per_sec)), |
| 2991 | attrs); |
| 2992 | attrs = Fcons (Fcons (Qcstime, |
| 2993 | ltime_from_jiffies (cstime, clocks_per_sec)), |
| 2994 | attrs); |
| 2995 | attrs = Fcons (Fcons (Qctime, |
| 2996 | ltime_from_jiffies (cstime + cutime, |
| 2997 | clocks_per_sec)), |
| 2998 | attrs); |
| 2999 | attrs = Fcons (Fcons (Qpri, make_number (priority)), attrs); |
| 3000 | attrs = Fcons (Fcons (Qnice, make_number (niceness)), attrs); |
| 3001 | attrs = Fcons (Fcons (Qthcount, make_fixnum_or_float (thcount)), |
| 3002 | attrs); |
| 3003 | tnow = current_timespec (); |
| 3004 | telapsed = get_up_time (); |
| 3005 | tboot = timespec_sub (tnow, telapsed); |
| 3006 | tstart = time_from_jiffies (start, clocks_per_sec); |
| 3007 | tstart = timespec_add (tboot, tstart); |
| 3008 | attrs = Fcons (Fcons (Qstart, make_lisp_time (tstart)), attrs); |
| 3009 | attrs = Fcons (Fcons (Qvsize, make_fixnum_or_float (vsize / 1024)), |
| 3010 | attrs); |
| 3011 | attrs = Fcons (Fcons (Qrss, make_fixnum_or_float (4 * rss)), attrs); |
| 3012 | telapsed = timespec_sub (tnow, tstart); |
| 3013 | attrs = Fcons (Fcons (Qetime, make_lisp_time (telapsed)), attrs); |
| 3014 | us_time = time_from_jiffies (u_time + s_time, clocks_per_sec); |
| 3015 | pcpu = timespectod (us_time) / timespectod (telapsed); |
| 3016 | if (pcpu > 1.0) |
| 3017 | pcpu = 1.0; |
| 3018 | attrs = Fcons (Fcons (Qpcpu, make_float (100 * pcpu)), attrs); |
| 3019 | pmem = 4.0 * 100 * rss / procfs_get_total_memory (); |
| 3020 | if (pmem > 100) |
| 3021 | pmem = 100; |
| 3022 | attrs = Fcons (Fcons (Qpmem, make_float (pmem)), attrs); |
| 3023 | } |
| 3024 | } |
| 3025 | dynwind_end (); |
| 3026 | |
| 3027 | /* args */ |
| 3028 | strcpy (procfn_end, "/cmdline"); |
| 3029 | fd = emacs_open (fn, O_RDONLY, 0); |
| 3030 | if (fd >= 0) |
| 3031 | { |
| 3032 | ptrdiff_t readsize, nread_incr; |
| 3033 | dynwind_begin (); |
| 3034 | record_unwind_protect_int (close_file_unwind, fd); |
| 3035 | nread = cmdline_size = 0; |
| 3036 | |
| 3037 | do |
| 3038 | { |
| 3039 | cmdline = xpalloc (cmdline, &cmdline_size, 2, STRING_BYTES_BOUND, 1); |
| 3040 | |
| 3041 | /* Leave room even if every byte needs escaping below. */ |
| 3042 | readsize = (cmdline_size >> 1) - nread; |
| 3043 | |
| 3044 | nread_incr = emacs_read (fd, cmdline + nread, readsize); |
| 3045 | nread += max (0, nread_incr); |
| 3046 | } |
| 3047 | while (nread_incr == readsize); |
| 3048 | |
| 3049 | if (nread) |
| 3050 | { |
| 3051 | /* We don't want trailing null characters. */ |
| 3052 | for (p = cmdline + nread; cmdline < p && !p[-1]; p--) |
| 3053 | continue; |
| 3054 | |
| 3055 | /* Escape-quote whitespace and backslashes. */ |
| 3056 | q = cmdline + cmdline_size; |
| 3057 | while (cmdline < p) |
| 3058 | { |
| 3059 | char c = *--p; |
| 3060 | *--q = c ? c : ' '; |
| 3061 | if (c_isspace (c) || c == '\\') |
| 3062 | *--q = '\\'; |
| 3063 | } |
| 3064 | |
| 3065 | nread = cmdline + cmdline_size - q; |
| 3066 | } |
| 3067 | |
| 3068 | if (!nread) |
| 3069 | { |
| 3070 | nread = cmdsize + 2; |
| 3071 | cmdline_size = nread + 1; |
| 3072 | q = cmdline = xrealloc (cmdline, cmdline_size); |
| 3073 | sprintf (cmdline, "[%.*s]", cmdsize, cmd); |
| 3074 | } |
| 3075 | /* Command line is encoded in locale-coding-system; decode it. */ |
| 3076 | cmd_str = make_unibyte_string (q, nread); |
| 3077 | decoded_cmd = code_convert_string_norecord (cmd_str, |
| 3078 | Vlocale_coding_system, 0); |
| 3079 | dynwind_end (); |
| 3080 | attrs = Fcons (Fcons (Qargs, decoded_cmd), attrs); |
| 3081 | } |
| 3082 | |
| 3083 | UNGCPRO; |
| 3084 | return attrs; |
| 3085 | } |
| 3086 | |
| 3087 | #elif defined (SOLARIS2) && defined (HAVE_PROCFS) |
| 3088 | |
| 3089 | /* The <procfs.h> header does not like to be included if _LP64 is defined and |
| 3090 | __FILE_OFFSET_BITS == 64. This is an ugly workaround that. */ |
| 3091 | #if !defined (_LP64) && defined (_FILE_OFFSET_BITS) && (_FILE_OFFSET_BITS == 64) |
| 3092 | #define PROCFS_FILE_OFFSET_BITS_HACK 1 |
| 3093 | #undef _FILE_OFFSET_BITS |
| 3094 | #else |
| 3095 | #define PROCFS_FILE_OFFSET_BITS_HACK 0 |
| 3096 | #endif |
| 3097 | |
| 3098 | #include <procfs.h> |
| 3099 | |
| 3100 | #if PROCFS_FILE_OFFSET_BITS_HACK == 1 |
| 3101 | #define _FILE_OFFSET_BITS 64 |
| 3102 | #ifdef _FILE_OFFSET_BITS /* Avoid unused-macro warnings. */ |
| 3103 | #endif |
| 3104 | #endif /* PROCFS_FILE_OFFSET_BITS_HACK == 1 */ |
| 3105 | |
| 3106 | Lisp_Object |
| 3107 | system_process_attributes (Lisp_Object pid) |
| 3108 | { |
| 3109 | char procfn[PATH_MAX], fn[PATH_MAX]; |
| 3110 | struct stat st; |
| 3111 | struct passwd *pw; |
| 3112 | struct group *gr; |
| 3113 | char *procfn_end; |
| 3114 | struct psinfo pinfo; |
| 3115 | int fd; |
| 3116 | ssize_t nread; |
| 3117 | printmax_t proc_id; |
| 3118 | uid_t uid; |
| 3119 | gid_t gid; |
| 3120 | Lisp_Object attrs = Qnil; |
| 3121 | Lisp_Object decoded_cmd; |
| 3122 | struct gcpro gcpro1, gcpro2; |
| 3123 | ptrdiff_t count; |
| 3124 | |
| 3125 | CHECK_NUMBER_OR_FLOAT (pid); |
| 3126 | CONS_TO_INTEGER (pid, pid_t, proc_id); |
| 3127 | sprintf (procfn, "/proc/%"pMd, proc_id); |
| 3128 | if (stat (procfn, &st) < 0) |
| 3129 | return attrs; |
| 3130 | |
| 3131 | GCPRO2 (attrs, decoded_cmd); |
| 3132 | |
| 3133 | /* euid egid */ |
| 3134 | uid = st.st_uid; |
| 3135 | attrs = Fcons (Fcons (Qeuid, make_fixnum_or_float (uid)), attrs); |
| 3136 | block_input (); |
| 3137 | pw = getpwuid (uid); |
| 3138 | unblock_input (); |
| 3139 | if (pw) |
| 3140 | attrs = Fcons (Fcons (Quser, build_string (pw->pw_name)), attrs); |
| 3141 | |
| 3142 | gid = st.st_gid; |
| 3143 | attrs = Fcons (Fcons (Qegid, make_fixnum_or_float (gid)), attrs); |
| 3144 | block_input (); |
| 3145 | gr = getgrgid (gid); |
| 3146 | unblock_input (); |
| 3147 | if (gr) |
| 3148 | attrs = Fcons (Fcons (Qgroup, build_string (gr->gr_name)), attrs); |
| 3149 | |
| 3150 | dynwind_begin (); |
| 3151 | strcpy (fn, procfn); |
| 3152 | procfn_end = fn + strlen (fn); |
| 3153 | strcpy (procfn_end, "/psinfo"); |
| 3154 | fd = emacs_open (fn, O_RDONLY, 0); |
| 3155 | if (fd < 0) |
| 3156 | nread = 0; |
| 3157 | else |
| 3158 | { |
| 3159 | record_unwind_protect (close_file_unwind, fd); |
| 3160 | nread = emacs_read (fd, &pinfo, sizeof pinfo); |
| 3161 | } |
| 3162 | |
| 3163 | if (nread == sizeof pinfo) |
| 3164 | { |
| 3165 | attrs = Fcons (Fcons (Qppid, make_fixnum_or_float (pinfo.pr_ppid)), attrs); |
| 3166 | attrs = Fcons (Fcons (Qpgrp, make_fixnum_or_float (pinfo.pr_pgid)), attrs); |
| 3167 | attrs = Fcons (Fcons (Qsess, make_fixnum_or_float (pinfo.pr_sid)), attrs); |
| 3168 | |
| 3169 | { |
| 3170 | char state_str[2]; |
| 3171 | state_str[0] = pinfo.pr_lwp.pr_sname; |
| 3172 | state_str[1] = '\0'; |
| 3173 | attrs = Fcons (Fcons (Qstate, build_string (state_str)), attrs); |
| 3174 | } |
| 3175 | |
| 3176 | /* FIXME: missing Qttyname. psinfo.pr_ttydev is a dev_t, |
| 3177 | need to get a string from it. */ |
| 3178 | |
| 3179 | /* FIXME: missing: Qtpgid */ |
| 3180 | |
| 3181 | /* FIXME: missing: |
| 3182 | Qminflt |
| 3183 | Qmajflt |
| 3184 | Qcminflt |
| 3185 | Qcmajflt |
| 3186 | |
| 3187 | Qutime |
| 3188 | Qcutime |
| 3189 | Qstime |
| 3190 | Qcstime |
| 3191 | Are they available? */ |
| 3192 | |
| 3193 | attrs = Fcons (Fcons (Qtime, make_lisp_time (pinfo.pr_time)), attrs); |
| 3194 | attrs = Fcons (Fcons (Qctime, make_lisp_time (pinfo.pr_ctime)), attrs); |
| 3195 | attrs = Fcons (Fcons (Qpri, make_number (pinfo.pr_lwp.pr_pri)), attrs); |
| 3196 | attrs = Fcons (Fcons (Qnice, make_number (pinfo.pr_lwp.pr_nice)), attrs); |
| 3197 | attrs = Fcons (Fcons (Qthcount, make_fixnum_or_float (pinfo.pr_nlwp)), |
| 3198 | attrs); |
| 3199 | |
| 3200 | attrs = Fcons (Fcons (Qstart, make_lisp_time (pinfo.pr_start)), attrs); |
| 3201 | attrs = Fcons (Fcons (Qvsize, make_fixnum_or_float (pinfo.pr_size)), |
| 3202 | attrs); |
| 3203 | attrs = Fcons (Fcons (Qrss, make_fixnum_or_float (pinfo.pr_rssize)), |
| 3204 | attrs); |
| 3205 | |
| 3206 | /* pr_pctcpu and pr_pctmem are unsigned integers in the |
| 3207 | range 0 .. 2**15, representing 0.0 .. 1.0. */ |
| 3208 | attrs = Fcons (Fcons (Qpcpu, |
| 3209 | make_float (100.0 / 0x8000 * pinfo.pr_pctcpu)), |
| 3210 | attrs); |
| 3211 | attrs = Fcons (Fcons (Qpmem, |
| 3212 | make_float (100.0 / 0x8000 * pinfo.pr_pctmem)), |
| 3213 | attrs); |
| 3214 | |
| 3215 | decoded_cmd = (code_convert_string_norecord |
| 3216 | (build_unibyte_string (pinfo.pr_fname), |
| 3217 | Vlocale_coding_system, 0)); |
| 3218 | attrs = Fcons (Fcons (Qcomm, decoded_cmd), attrs); |
| 3219 | decoded_cmd = (code_convert_string_norecord |
| 3220 | (build_unibyte_string (pinfo.pr_psargs), |
| 3221 | Vlocale_coding_system, 0)); |
| 3222 | attrs = Fcons (Fcons (Qargs, decoded_cmd), attrs); |
| 3223 | } |
| 3224 | dynwind_end (); |
| 3225 | UNGCPRO; |
| 3226 | return attrs; |
| 3227 | } |
| 3228 | |
| 3229 | #elif defined __FreeBSD__ |
| 3230 | |
| 3231 | static struct timespec |
| 3232 | timeval_to_timespec (struct timeval t) |
| 3233 | { |
| 3234 | return make_timespec (t.tv_sec, t.tv_usec * 1000); |
| 3235 | } |
| 3236 | |
| 3237 | static Lisp_Object |
| 3238 | make_lisp_timeval (struct timeval t) |
| 3239 | { |
| 3240 | return make_lisp_time (timeval_to_timespec (t)); |
| 3241 | } |
| 3242 | |
| 3243 | Lisp_Object |
| 3244 | system_process_attributes (Lisp_Object pid) |
| 3245 | { |
| 3246 | int proc_id; |
| 3247 | int pagesize = getpagesize (); |
| 3248 | unsigned long npages; |
| 3249 | int fscale; |
| 3250 | struct passwd *pw; |
| 3251 | struct group *gr; |
| 3252 | char *ttyname; |
| 3253 | size_t len; |
| 3254 | char args[MAXPATHLEN]; |
| 3255 | struct timespec t, now; |
| 3256 | |
| 3257 | int mib[4] = {CTL_KERN, KERN_PROC, KERN_PROC_PID}; |
| 3258 | struct kinfo_proc proc; |
| 3259 | size_t proclen = sizeof proc; |
| 3260 | |
| 3261 | struct gcpro gcpro1, gcpro2; |
| 3262 | Lisp_Object attrs = Qnil; |
| 3263 | Lisp_Object decoded_comm; |
| 3264 | |
| 3265 | CHECK_NUMBER_OR_FLOAT (pid); |
| 3266 | CONS_TO_INTEGER (pid, int, proc_id); |
| 3267 | mib[3] = proc_id; |
| 3268 | |
| 3269 | if (sysctl (mib, 4, &proc, &proclen, NULL, 0) != 0) |
| 3270 | return attrs; |
| 3271 | |
| 3272 | GCPRO2 (attrs, decoded_comm); |
| 3273 | |
| 3274 | attrs = Fcons (Fcons (Qeuid, make_fixnum_or_float (proc.ki_uid)), attrs); |
| 3275 | |
| 3276 | block_input (); |
| 3277 | pw = getpwuid (proc.ki_uid); |
| 3278 | unblock_input (); |
| 3279 | if (pw) |
| 3280 | attrs = Fcons (Fcons (Quser, build_string (pw->pw_name)), attrs); |
| 3281 | |
| 3282 | attrs = Fcons (Fcons (Qegid, make_fixnum_or_float (proc.ki_svgid)), attrs); |
| 3283 | |
| 3284 | block_input (); |
| 3285 | gr = getgrgid (proc.ki_svgid); |
| 3286 | unblock_input (); |
| 3287 | if (gr) |
| 3288 | attrs = Fcons (Fcons (Qgroup, build_string (gr->gr_name)), attrs); |
| 3289 | |
| 3290 | decoded_comm = (code_convert_string_norecord |
| 3291 | (build_unibyte_string (proc.ki_comm), |
| 3292 | Vlocale_coding_system, 0)); |
| 3293 | |
| 3294 | attrs = Fcons (Fcons (Qcomm, decoded_comm), attrs); |
| 3295 | { |
| 3296 | char state[2] = {'\0', '\0'}; |
| 3297 | switch (proc.ki_stat) |
| 3298 | { |
| 3299 | case SRUN: |
| 3300 | state[0] = 'R'; |
| 3301 | break; |
| 3302 | |
| 3303 | case SSLEEP: |
| 3304 | state[0] = 'S'; |
| 3305 | break; |
| 3306 | |
| 3307 | case SLOCK: |
| 3308 | state[0] = 'D'; |
| 3309 | break; |
| 3310 | |
| 3311 | case SZOMB: |
| 3312 | state[0] = 'Z'; |
| 3313 | break; |
| 3314 | |
| 3315 | case SSTOP: |
| 3316 | state[0] = 'T'; |
| 3317 | break; |
| 3318 | } |
| 3319 | attrs = Fcons (Fcons (Qstate, build_string (state)), attrs); |
| 3320 | } |
| 3321 | |
| 3322 | attrs = Fcons (Fcons (Qppid, make_fixnum_or_float (proc.ki_ppid)), attrs); |
| 3323 | attrs = Fcons (Fcons (Qpgrp, make_fixnum_or_float (proc.ki_pgid)), attrs); |
| 3324 | attrs = Fcons (Fcons (Qsess, make_fixnum_or_float (proc.ki_sid)), attrs); |
| 3325 | |
| 3326 | block_input (); |
| 3327 | ttyname = proc.ki_tdev == NODEV ? NULL : devname (proc.ki_tdev, S_IFCHR); |
| 3328 | unblock_input (); |
| 3329 | if (ttyname) |
| 3330 | attrs = Fcons (Fcons (Qtty, build_string (ttyname)), attrs); |
| 3331 | |
| 3332 | attrs = Fcons (Fcons (Qtpgid, make_fixnum_or_float (proc.ki_tpgid)), attrs); |
| 3333 | attrs = Fcons (Fcons (Qminflt, make_fixnum_or_float (proc.ki_rusage.ru_minflt)), attrs); |
| 3334 | attrs = Fcons (Fcons (Qmajflt, make_fixnum_or_float (proc.ki_rusage.ru_majflt)), attrs); |
| 3335 | attrs = Fcons (Fcons (Qcminflt, make_number (proc.ki_rusage_ch.ru_minflt)), attrs); |
| 3336 | attrs = Fcons (Fcons (Qcmajflt, make_number (proc.ki_rusage_ch.ru_majflt)), attrs); |
| 3337 | |
| 3338 | attrs = Fcons (Fcons (Qutime, make_lisp_timeval (proc.ki_rusage.ru_utime)), |
| 3339 | attrs); |
| 3340 | attrs = Fcons (Fcons (Qstime, make_lisp_timeval (proc.ki_rusage.ru_stime)), |
| 3341 | attrs); |
| 3342 | t = timespec_add (timeval_to_timespec (proc.ki_rusage.ru_utime), |
| 3343 | timeval_to_timespec (proc.ki_rusage.ru_stime)); |
| 3344 | attrs = Fcons (Fcons (Qtime, make_lisp_time (t)), attrs); |
| 3345 | |
| 3346 | attrs = Fcons (Fcons (Qcutime, |
| 3347 | make_lisp_timeval (proc.ki_rusage_ch.ru_utime)), |
| 3348 | attrs); |
| 3349 | attrs = Fcons (Fcons (Qcstime, |
| 3350 | make_lisp_timeval (proc.ki_rusage_ch.ru_utime)), |
| 3351 | attrs); |
| 3352 | t = timespec_add (timeval_to_timespec (proc.ki_rusage_ch.ru_utime), |
| 3353 | timeval_to_timespec (proc.ki_rusage_ch.ru_stime)); |
| 3354 | attrs = Fcons (Fcons (Qctime, make_lisp_time (t)), attrs); |
| 3355 | |
| 3356 | attrs = Fcons (Fcons (Qthcount, make_fixnum_or_float (proc.ki_numthreads)), |
| 3357 | attrs); |
| 3358 | attrs = Fcons (Fcons (Qpri, make_number (proc.ki_pri.pri_native)), attrs); |
| 3359 | attrs = Fcons (Fcons (Qnice, make_number (proc.ki_nice)), attrs); |
| 3360 | attrs = Fcons (Fcons (Qstart, make_lisp_timeval (proc.ki_start)), attrs); |
| 3361 | attrs = Fcons (Fcons (Qvsize, make_number (proc.ki_size >> 10)), attrs); |
| 3362 | attrs = Fcons (Fcons (Qrss, make_number (proc.ki_rssize * pagesize >> 10)), |
| 3363 | attrs); |
| 3364 | |
| 3365 | now = current_timespec (); |
| 3366 | t = timespec_sub (now, timeval_to_timespec (proc.ki_start)); |
| 3367 | attrs = Fcons (Fcons (Qetime, make_lisp_time (t)), attrs); |
| 3368 | |
| 3369 | len = sizeof fscale; |
| 3370 | if (sysctlbyname ("kern.fscale", &fscale, &len, NULL, 0) == 0) |
| 3371 | { |
| 3372 | double pcpu; |
| 3373 | fixpt_t ccpu; |
| 3374 | len = sizeof ccpu; |
| 3375 | if (sysctlbyname ("kern.ccpu", &ccpu, &len, NULL, 0) == 0) |
| 3376 | { |
| 3377 | pcpu = (100.0 * proc.ki_pctcpu / fscale |
| 3378 | / (1 - exp (proc.ki_swtime * log ((double) ccpu / fscale)))); |
| 3379 | attrs = Fcons (Fcons (Qpcpu, make_fixnum_or_float (pcpu)), attrs); |
| 3380 | } |
| 3381 | } |
| 3382 | |
| 3383 | len = sizeof npages; |
| 3384 | if (sysctlbyname ("hw.availpages", &npages, &len, NULL, 0) == 0) |
| 3385 | { |
| 3386 | double pmem = (proc.ki_flag & P_INMEM |
| 3387 | ? 100.0 * proc.ki_rssize / npages |
| 3388 | : 0); |
| 3389 | attrs = Fcons (Fcons (Qpmem, make_fixnum_or_float (pmem)), attrs); |
| 3390 | } |
| 3391 | |
| 3392 | mib[2] = KERN_PROC_ARGS; |
| 3393 | len = MAXPATHLEN; |
| 3394 | if (sysctl (mib, 4, args, &len, NULL, 0) == 0) |
| 3395 | { |
| 3396 | int i; |
| 3397 | for (i = 0; i < len; i++) |
| 3398 | { |
| 3399 | if (! args[i] && i < len - 1) |
| 3400 | args[i] = ' '; |
| 3401 | } |
| 3402 | |
| 3403 | decoded_comm = |
| 3404 | (code_convert_string_norecord |
| 3405 | (build_unibyte_string (args), |
| 3406 | Vlocale_coding_system, 0)); |
| 3407 | |
| 3408 | attrs = Fcons (Fcons (Qargs, decoded_comm), attrs); |
| 3409 | } |
| 3410 | |
| 3411 | UNGCPRO; |
| 3412 | return attrs; |
| 3413 | } |
| 3414 | |
| 3415 | /* The WINDOWSNT implementation is in w32.c. |
| 3416 | The MSDOS implementation is in dosfns.c. */ |
| 3417 | #elif !defined (WINDOWSNT) && !defined (MSDOS) |
| 3418 | |
| 3419 | Lisp_Object |
| 3420 | system_process_attributes (Lisp_Object pid) |
| 3421 | { |
| 3422 | return Qnil; |
| 3423 | } |
| 3424 | |
| 3425 | #endif /* !defined (WINDOWSNT) */ |