Commit | Line | Data |
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86a5659e | 1 | /* Interfaces to system-dependent kernel and library entries. |
ba318903 | 2 | Copyright (C) 1985-1988, 1993-1995, 1999-2014 Free Software |
ab422c4d | 3 | Foundation, Inc. |
86a5659e JB |
4 | |
5 | This file is part of GNU Emacs. | |
6 | ||
9ec0b715 | 7 | GNU Emacs is free software: you can redistribute it and/or modify |
86a5659e | 8 | it under the terms of the GNU General Public License as published by |
9ec0b715 GM |
9 | the Free Software Foundation, either version 3 of the License, or |
10 | (at your option) any later version. | |
86a5659e JB |
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 | |
9ec0b715 | 18 | along with GNU Emacs. If not, see <http://www.gnu.org/licenses/>. */ |
86a5659e | 19 | |
4838e624 | 20 | #include <config.h> |
f162bcc3 | 21 | |
cf29dd84 | 22 | #include <execinfo.h> |
406af475 | 23 | #include "sysstdio.h" |
06e111a6 DN |
24 | #ifdef HAVE_PWD_H |
25 | #include <pwd.h> | |
26 | #include <grp.h> | |
27 | #endif /* HAVE_PWD_H */ | |
06e111a6 | 28 | #include <limits.h> |
d3eb3bfa | 29 | #include <unistd.h> |
53934c98 | 30 | |
620f13b0 | 31 | #include <c-ctype.h> |
d35af63c | 32 | #include <utimens.h> |
67342916 | 33 | |
86a5659e | 34 | #include "lisp.h" |
819b8f00 | 35 | #include "sysselect.h" |
9ac0d9e0 | 36 | #include "blockinput.h" |
86a5659e | 37 | |
7fd8c501 PE |
38 | #if defined DARWIN_OS || defined __FreeBSD__ |
39 | # include <sys/sysctl.h> | |
7dca65a4 PE |
40 | #endif |
41 | ||
42 | #ifdef __FreeBSD__ | |
368a85a4 PE |
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> | |
b91b7e4d EW |
51 | #endif |
52 | ||
fe03522b | 53 | #ifdef WINDOWSNT |
e15b6288 JR |
54 | #define read sys_read |
55 | #define write sys_write | |
62aba0d4 FP |
56 | #ifndef STDERR_FILENO |
57 | #define STDERR_FILENO fileno(GetStdHandle(STD_ERROR_HANDLE)) | |
58 | #endif | |
fe03522b | 59 | #include <windows.h> |
fe03522b RS |
60 | #endif /* not WINDOWSNT */ |
61 | ||
86a5659e JB |
62 | #include <sys/types.h> |
63 | #include <sys/stat.h> | |
64 | #include <errno.h> | |
65 | ||
b05af5d3 PE |
66 | /* Get SI_SRPC_DOMAIN, if it is available. */ |
67 | #ifdef HAVE_SYS_SYSTEMINFO_H | |
68 | #include <sys/systeminfo.h> | |
69 | #endif | |
70 | ||
207bdbdb | 71 | #ifdef MSDOS /* Demacs 1.1.2 91/10/20 Manabu Higashida, MW Aug 1993 */ |
207bdbdb | 72 | #include "msdos.h" |
15614e61 | 73 | #endif |
207bdbdb | 74 | |
7fd8c501 | 75 | #include <sys/param.h> |
bb4bc8e2 | 76 | #include <sys/file.h> |
bb4bc8e2 | 77 | #include <fcntl.h> |
86a5659e | 78 | |
e04a4e0d | 79 | #include "systty.h" |
94c8642a | 80 | #include "syswait.h" |
86a5659e | 81 | |
a7ebc409 | 82 | #ifdef HAVE_SYS_UTSNAME_H |
86a5659e | 83 | #include <sys/utsname.h> |
86a5659e | 84 | #include <memory.h> |
a7ebc409 | 85 | #endif /* HAVE_SYS_UTSNAME_H */ |
86a5659e | 86 | |
e36ec798 | 87 | #include "keyboard.h" |
0137dbf7 | 88 | #include "frame.h" |
86a5659e JB |
89 | #include "window.h" |
90 | #include "termhooks.h" | |
91 | #include "termchar.h" | |
92 | #include "termopts.h" | |
93 | #include "dispextern.h" | |
94 | #include "process.h" | |
0a125897 | 95 | #include "cm.h" /* for reset_sys_modes */ |
86a5659e | 96 | |
fe03522b RS |
97 | #ifdef WINDOWSNT |
98 | #include <direct.h> | |
99 | /* In process.h which conflicts with the local copy. */ | |
100 | #define _P_WAIT 0 | |
43db14bb JB |
101 | int _cdecl _spawnlp (int, const char *, const char *, ...); |
102 | int _cdecl _getpid (void); | |
fe03522b RS |
103 | #endif |
104 | ||
91bac16a JB |
105 | #include "syssignal.h" |
106 | #include "systime.h" | |
86a5659e | 107 | |
653d4f43 PE |
108 | static void emacs_get_tty (int, struct emacs_tty *); |
109 | static int emacs_set_tty (int, struct emacs_tty *, bool); | |
1fa53021 | 110 | |
5a16b9bc PE |
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 | ||
ff2e8052 DN |
116 | /* Declare here, including term.h is problematic on some systems. */ |
117 | extern void tputs (const char *, int, int (*)(int)); | |
118 | ||
91433552 | 119 | static const int baud_convert[] = |
86a5659e JB |
120 | { |
121 | 0, 50, 75, 110, 135, 150, 200, 300, 600, 1200, | |
122 | 1800, 2400, 4800, 9600, 19200, 38400 | |
123 | }; | |
86a5659e | 124 | |
f78f1a83 | 125 | |
3480d92b | 126 | #if !defined (HAVE_GET_CURRENT_DIR_NAME) || defined (BROKEN_GET_CURRENT_DIR_NAME) |
f78f1a83 | 127 | |
b6682dd9 | 128 | /* Return the current working directory. Returns NULL on errors. |
f78f1a83 EZ |
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. */ | |
faa52174 | 131 | char * |
cf84bb53 | 132 | get_current_dir_name (void) |
f78f1a83 EZ |
133 | { |
134 | char *buf; | |
9239d970 | 135 | char *pwd = getenv ("PWD"); |
f78f1a83 | 136 | struct stat dotstat, pwdstat; |
9239d970 | 137 | /* If PWD is accurate, use it instead of calling getcwd. PWD is |
f78f1a83 EZ |
138 | sometimes a nicer name, and using it may avoid a fatal error if a |
139 | parent directory is searchable but not readable. */ | |
9239d970 | 140 | if (pwd |
f78f1a83 EZ |
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 | { | |
38182d90 | 151 | buf = malloc (strlen (pwd) + 1); |
f78f1a83 EZ |
152 | if (!buf) |
153 | return NULL; | |
154 | strcpy (buf, pwd); | |
155 | } | |
f78f1a83 EZ |
156 | else |
157 | { | |
158 | size_t buf_size = 1024; | |
38182d90 | 159 | buf = malloc (buf_size); |
f78f1a83 EZ |
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; | |
38182d90 | 174 | buf = realloc (buf, buf_size); |
f78f1a83 EZ |
175 | if (!buf) |
176 | return NULL; | |
177 | } | |
178 | } | |
f78f1a83 EZ |
179 | return buf; |
180 | } | |
181 | #endif | |
182 | ||
64e971c3 | 183 | \f |
9628b887 | 184 | /* Discard pending input on all input descriptors. */ |
91bac16a | 185 | |
08633194 | 186 | void |
971de7fb | 187 | discard_tty_input (void) |
86a5659e | 188 | { |
fe03522b | 189 | #ifndef WINDOWSNT |
91bac16a | 190 | struct emacs_tty buf; |
86a5659e JB |
191 | |
192 | if (noninteractive) | |
193 | return; | |
194 | ||
fe03522b | 195 | #ifdef MSDOS /* Demacs 1.1.1 91/10/16 HIRANO Satoshi */ |
207bdbdb | 196 | while (dos_keyread () != -1) |
fe03522b | 197 | ; |
207bdbdb | 198 | #else /* not MSDOS */ |
9628b887 | 199 | { |
28d7d09f | 200 | struct tty_display_info *tty; |
9628b887 KL |
201 | for (tty = tty_list; tty; tty = tty->next) |
202 | { | |
0b0d3e0b KL |
203 | if (tty->input) /* Is the device suspended? */ |
204 | { | |
12e610e8 DN |
205 | emacs_get_tty (fileno (tty->input), &buf); |
206 | emacs_set_tty (fileno (tty->input), &buf, 0); | |
0b0d3e0b | 207 | } |
9628b887 KL |
208 | } |
209 | } | |
207bdbdb | 210 | #endif /* not MSDOS */ |
fe03522b | 211 | #endif /* not WINDOWSNT */ |
86a5659e JB |
212 | } |
213 | ||
16c290d8 | 214 | \f |
86a5659e JB |
215 | #ifdef SIGTSTP |
216 | ||
64e971c3 | 217 | /* Arrange for character C to be read as the next input from |
16c290d8 KL |
218 | the terminal. |
219 | XXX What if we have multiple ttys? | |
220 | */ | |
64e971c3 | 221 | |
dfcf069d | 222 | void |
0c2338d8 | 223 | stuff_char (char c) |
86a5659e | 224 | { |
428a555e | 225 | if (! FRAME_TERMCAP_P (SELECTED_FRAME ())) |
23dab951 RS |
226 | return; |
227 | ||
86a5659e JB |
228 | /* Should perhaps error if in batch mode */ |
229 | #ifdef TIOCSTI | |
0b0d3e0b | 230 | ioctl (fileno (CURTTY()->input), TIOCSTI, &c); |
86a5659e | 231 | #else /* no TIOCSTI */ |
71f06467 | 232 | error ("Cannot stuff terminal input characters in this version of Unix"); |
86a5659e JB |
233 | #endif /* no TIOCSTI */ |
234 | } | |
235 | ||
236 | #endif /* SIGTSTP */ | |
64e971c3 | 237 | \f |
08633194 | 238 | void |
16c290d8 | 239 | init_baud_rate (int fd) |
86a5659e | 240 | { |
4c620157 | 241 | int emacs_ospeed; |
67342916 | 242 | |
86a5659e | 243 | if (noninteractive) |
5bdd7bdd | 244 | emacs_ospeed = 0; |
86a5659e JB |
245 | else |
246 | { | |
fe03522b | 247 | #ifdef DOS_NT |
5bdd7bdd | 248 | emacs_ospeed = 15; |
fe03522b | 249 | #else /* not DOS_NT */ |
e04a4e0d | 250 | struct termios sg; |
91bac16a | 251 | |
71f06467 | 252 | sg.c_cflag = B9600; |
16c290d8 | 253 | tcgetattr (fd, &sg); |
5bdd7bdd | 254 | emacs_ospeed = cfgetospeed (&sg); |
fe03522b | 255 | #endif /* not DOS_NT */ |
86a5659e | 256 | } |
177c0ea7 | 257 | |
c72d972c | 258 | baud_rate = (emacs_ospeed < ARRAYELTS (baud_convert) |
5bdd7bdd | 259 | ? baud_convert[emacs_ospeed] : 9600); |
86a5659e JB |
260 | if (baud_rate == 0) |
261 | baud_rate = 1200; | |
262 | } | |
263 | ||
16c290d8 | 264 | \f |
86a5659e | 265 | |
77defa9a | 266 | #ifndef MSDOS |
86a5659e | 267 | |
bb5f74ee PE |
268 | /* Wait for the subprocess with process id CHILD to terminate or change status. |
269 | CHILD must be a child process that has not been reaped. | |
270 | If STATUS is non-null, store the waitpid-style exit status into *STATUS | |
271 | and tell wait_reading_process_output that it needs to look around. | |
272 | Use waitpid-style OPTIONS when waiting. | |
273 | If INTERRUPTIBLE, this function is interruptible by a signal. | |
274 | ||
275 | Return CHILD if successful, 0 if no status is available; | |
276 | the latter is possible only when options & NOHANG. */ | |
277 | static pid_t | |
278 | get_child_status (pid_t child, int *status, int options, bool interruptible) | |
86a5659e | 279 | { |
bb5f74ee PE |
280 | pid_t pid; |
281 | ||
282 | /* Invoke waitpid only with a known process ID; do not invoke | |
283 | waitpid with a nonpositive argument. Otherwise, Emacs might | |
284 | reap an unwanted process by mistake. For example, invoking | |
285 | waitpid (-1, ...) can mess up glib by reaping glib's subprocesses, | |
286 | so that another thread running glib won't find them. */ | |
908589fd | 287 | eassert (child > 0); |
bb5f74ee PE |
288 | |
289 | while ((pid = waitpid (child, status, options)) < 0) | |
86a5659e | 290 | { |
9cdde1e2 PE |
291 | /* Check that CHILD is a child process that has not been reaped, |
292 | and that STATUS and OPTIONS are valid. Otherwise abort, | |
293 | as continuing after this internal error could cause Emacs to | |
294 | become confused and kill innocent-victim processes. */ | |
295 | if (errno != EINTR) | |
296 | emacs_abort (); | |
ac3ac859 | 297 | |
22bae83f EZ |
298 | /* Note: the MS-Windows emulation of waitpid calls QUIT |
299 | internally. */ | |
1ef14cb4 LMI |
300 | if (interruptible) |
301 | QUIT; | |
86a5659e | 302 | } |
86a5659e | 303 | |
bb5f74ee PE |
304 | /* If successful and status is requested, tell wait_reading_process_output |
305 | that it needs to wake up and look around. */ | |
306 | if (pid && status && input_available_clear_time) | |
43aac990 | 307 | *input_available_clear_time = make_timespec (0, 0); |
e7a6747f | 308 | |
bb5f74ee PE |
309 | return pid; |
310 | } | |
311 | ||
312 | /* Wait for the subprocess with process id CHILD to terminate. | |
313 | CHILD must be a child process that has not been reaped. | |
314 | If STATUS is non-null, store the waitpid-style exit status into *STATUS | |
315 | and tell wait_reading_process_output that it needs to look around. | |
316 | If INTERRUPTIBLE, this function is interruptible by a signal. */ | |
e7a6747f | 317 | void |
bb5f74ee | 318 | wait_for_termination (pid_t child, int *status, bool interruptible) |
e7a6747f | 319 | { |
bb5f74ee | 320 | get_child_status (child, status, 0, interruptible); |
e7a6747f AS |
321 | } |
322 | ||
bb5f74ee PE |
323 | /* Report whether the subprocess with process id CHILD has changed status. |
324 | Termination counts as a change of status. | |
325 | CHILD must be a child process that has not been reaped. | |
326 | If STATUS is non-null, store the waitpid-style exit status into *STATUS | |
327 | and tell wait_reading_process_output that it needs to look around. | |
328 | Use waitpid-style OPTIONS to check status, but do not wait. | |
329 | ||
330 | Return CHILD if successful, 0 if no status is available because | |
331 | the process's state has not changed. */ | |
332 | pid_t | |
333 | child_status_changed (pid_t child, int *status, int options) | |
e7a6747f | 334 | { |
bb5f74ee | 335 | return get_child_status (child, status, WNOHANG | options, 0); |
e7a6747f AS |
336 | } |
337 | ||
64e971c3 | 338 | \f |
86a5659e JB |
339 | /* Set up the terminal at the other end of a pseudo-terminal that |
340 | we will be controlling an inferior through. | |
341 | It should not echo or do line-editing, since that is done | |
342 | in Emacs. No padding needed for insertion into an Emacs buffer. */ | |
343 | ||
08633194 | 344 | void |
971de7fb | 345 | child_setup_tty (int out) |
86a5659e | 346 | { |
77defa9a | 347 | #ifndef WINDOWSNT |
91bac16a JB |
348 | struct emacs_tty s; |
349 | ||
12e610e8 | 350 | emacs_get_tty (out, &s); |
91bac16a JB |
351 | s.main.c_oflag |= OPOST; /* Enable output postprocessing */ |
352 | s.main.c_oflag &= ~ONLCR; /* Disable map of NL to CR-NL on output */ | |
9d4e5eea | 353 | #ifdef NLDLY |
07cfc4e7 GM |
354 | /* http://lists.gnu.org/archive/html/emacs-devel/2008-05/msg00406.html |
355 | Some versions of GNU Hurd do not have FFDLY? */ | |
356 | #ifdef FFDLY | |
91bac16a JB |
357 | s.main.c_oflag &= ~(NLDLY|CRDLY|TABDLY|BSDLY|VTDLY|FFDLY); |
358 | /* No output delays */ | |
07cfc4e7 GM |
359 | #else |
360 | s.main.c_oflag &= ~(NLDLY|CRDLY|TABDLY|BSDLY|VTDLY); | |
361 | /* No output delays */ | |
362 | #endif | |
9d4e5eea | 363 | #endif |
91bac16a JB |
364 | s.main.c_lflag &= ~ECHO; /* Disable echo */ |
365 | s.main.c_lflag |= ISIG; /* Enable signals */ | |
9d4e5eea RS |
366 | #ifdef IUCLC |
367 | s.main.c_iflag &= ~IUCLC; /* Disable downcasing on input. */ | |
368 | #endif | |
f7097b2a RS |
369 | #ifdef ISTRIP |
370 | s.main.c_iflag &= ~ISTRIP; /* don't strip 8th bit on input */ | |
371 | #endif | |
23e4c8be | 372 | #ifdef OLCUC |
9d4e5eea RS |
373 | s.main.c_oflag &= ~OLCUC; /* Disable upcasing on output. */ |
374 | #endif | |
f7097b2a | 375 | s.main.c_oflag &= ~TAB3; /* Disable tab expansion */ |
1bf96fb5 | 376 | s.main.c_cflag = (s.main.c_cflag & ~CSIZE) | CS8; /* Don't strip 8th bit */ |
441f6399 RS |
377 | s.main.c_cc[VERASE] = CDISABLE; /* disable erase processing */ |
378 | s.main.c_cc[VKILL] = CDISABLE; /* disable kill processing */ | |
91bac16a | 379 | |
86a5659e | 380 | #ifdef HPUX |
91bac16a | 381 | s.main.c_cflag = (s.main.c_cflag & ~CBAUD) | B9600; /* baud rate sanity */ |
86a5659e | 382 | #endif /* HPUX */ |
91bac16a | 383 | |
dfe598b5 RS |
384 | #ifdef SIGNALS_VIA_CHARACTERS |
385 | /* the QUIT and INTR character are used in process_send_signal | |
386 | so set them here to something useful. */ | |
fa51fa32 | 387 | if (s.main.c_cc[VQUIT] == CDISABLE) |
dfe598b5 | 388 | s.main.c_cc[VQUIT] = '\\'&037; /* Control-\ */ |
fa51fa32 | 389 | if (s.main.c_cc[VINTR] == CDISABLE) |
dfe598b5 RS |
390 | s.main.c_cc[VINTR] = 'C'&037; /* Control-C */ |
391 | #endif /* not SIGNALS_VIA_CHARACTERS */ | |
392 | ||
86a5659e | 393 | #ifdef AIX |
86a5659e JB |
394 | /* Also, PTY overloads NUL and BREAK. |
395 | don't ignore break, but don't signal either, so it looks like NUL. */ | |
91bac16a JB |
396 | s.main.c_iflag &= ~IGNBRK; |
397 | s.main.c_iflag &= ~BRKINT; | |
dfe598b5 RS |
398 | /* rms: Formerly it set s.main.c_cc[VINTR] to 0377 here |
399 | unconditionally. Then a SIGNALS_VIA_CHARACTERS conditional | |
400 | would force it to 0377. That looks like duplicated code. */ | |
91bac16a | 401 | s.main.c_cflag = (s.main.c_cflag & ~CBAUD) | B9600; /* baud rate sanity */ |
86a5659e JB |
402 | #endif /* AIX */ |
403 | ||
aaa0a19a | 404 | /* We originally enabled ICANON (and set VEOF to 04), and then had |
c80e3b4a | 405 | process.c send additional EOF chars to flush the output when faced |
aaa0a19a | 406 | with long lines, but this leads to weird effects when the |
2b0a91e7 SM |
407 | subprocess has disabled ICANON and ends up seeing those spurious |
408 | extra EOFs. So we don't send EOFs any more in | |
aaa0a19a SM |
409 | process.c:send_process. First we tried to disable ICANON by |
410 | default, so if a subsprocess sets up ICANON, it's his problem (or | |
411 | the Elisp package that talks to it) to deal with lines that are | |
412 | too long. But this disables some features, such as the ability | |
413 | to send EOF signals. So we re-enabled ICANON but there is no | |
414 | more "send eof to flush" going on (which is wrong and unportable | |
415 | in itself). The correct way to handle too much output is to | |
416 | buffer what could not be written and then write it again when | |
417 | select returns ok for writing. This has it own set of | |
418 | problems. Write is now asynchronous, is that a problem? How much | |
419 | do we buffer, and what do we do when that limit is reached? */ | |
9a747ba6 JD |
420 | |
421 | s.main.c_lflag |= ICANON; /* Enable line editing and eof processing */ | |
422 | s.main.c_cc[VEOF] = 'D'&037; /* Control-D */ | |
3d15fe78 | 423 | #if 0 /* These settings only apply to non-ICANON mode. */ |
2b0a91e7 SM |
424 | s.main.c_cc[VMIN] = 1; |
425 | s.main.c_cc[VTIME] = 0; | |
aaa0a19a | 426 | #endif |
2b0a91e7 | 427 | |
12e610e8 | 428 | emacs_set_tty (out, &s, 0); |
77defa9a | 429 | #endif /* not WINDOWSNT */ |
86a5659e | 430 | } |
57507bf8 | 431 | #endif /* not MSDOS */ |
86a5659e | 432 | |
64e971c3 | 433 | \f |
2fe28299 | 434 | /* Record a signal code and the action for it. */ |
86a5659e JB |
435 | struct save_signal |
436 | { | |
437 | int code; | |
2fe28299 | 438 | struct sigaction action; |
86a5659e JB |
439 | }; |
440 | ||
f57e2426 J |
441 | static void save_signal_handlers (struct save_signal *); |
442 | static void restore_signal_handlers (struct save_signal *); | |
35a05cca | 443 | |
86a5659e JB |
444 | /* Suspend the Emacs process; give terminal to its superior. */ |
445 | ||
08633194 | 446 | void |
971de7fb | 447 | sys_suspend (void) |
86a5659e | 448 | { |
d983a10b PE |
449 | #ifndef DOS_NT |
450 | kill (0, SIGTSTP); | |
451 | #else | |
86a5659e JB |
452 | /* On a system where suspending is not implemented, |
453 | instead fork a subshell and let it talk directly to the terminal | |
454 | while we wait. */ | |
a0932daa KH |
455 | sys_subshell (); |
456 | ||
d983a10b | 457 | #endif |
a0932daa KH |
458 | } |
459 | ||
460 | /* Fork a subshell. */ | |
461 | ||
08633194 | 462 | void |
971de7fb | 463 | sys_subshell (void) |
a0932daa | 464 | { |
ad00c243 | 465 | #ifdef DOS_NT /* Demacs 1.1.2 91/10/20 Manabu Higashida */ |
a0932daa | 466 | int st; |
5c4a19a9 | 467 | #ifdef MSDOS |
a0932daa | 468 | char oldwd[MAXPATHLEN+1]; /* Fixed length is safe on MSDOS. */ |
5c4a19a9 EZ |
469 | #else |
470 | char oldwd[MAX_UTF8_PATH]; | |
471 | #endif | |
a0932daa | 472 | #endif |
5fbab051 | 473 | pid_t pid; |
bb5f74ee | 474 | int status; |
86a5659e | 475 | struct save_signal saved_handlers[5]; |
c365c355 PE |
476 | char *str = SSDATA (encode_current_directory ()); |
477 | ||
478 | #ifdef DOS_NT | |
479 | pid = 0; | |
480 | #else | |
481 | { | |
482 | char *volatile str_volatile = str; | |
483 | pid = vfork (); | |
484 | str = str_volatile; | |
485 | } | |
486 | #endif | |
487 | ||
488 | if (pid < 0) | |
489 | error ("Can't spawn subshell"); | |
86a5659e JB |
490 | |
491 | saved_handlers[0].code = SIGINT; | |
492 | saved_handlers[1].code = SIGQUIT; | |
493 | saved_handlers[2].code = SIGTERM; | |
4a4bbad2 | 494 | #ifdef USABLE_SIGIO |
86a5659e JB |
495 | saved_handlers[3].code = SIGIO; |
496 | saved_handlers[4].code = 0; | |
497 | #else | |
498 | saved_handlers[3].code = 0; | |
499 | #endif | |
500 | ||
ad00c243 | 501 | #ifdef DOS_NT |
718ca3cf | 502 | save_signal_handlers (saved_handlers); |
7964ba9e RS |
503 | #endif |
504 | ||
86a5659e JB |
505 | if (pid == 0) |
506 | { | |
8ea90aa3 | 507 | const char *sh = 0; |
86a5659e | 508 | |
ad00c243 | 509 | #ifdef DOS_NT /* MW, Aug 1993 */ |
9239d970 | 510 | getcwd (oldwd, sizeof oldwd); |
7964ba9e | 511 | if (sh == 0) |
83be8524 | 512 | sh = egetenv ("SUSPEND"); /* KFS, 1994-12-14 */ |
207bdbdb | 513 | #endif |
7964ba9e | 514 | if (sh == 0) |
83be8524 | 515 | sh = egetenv ("SHELL"); |
86a5659e JB |
516 | if (sh == 0) |
517 | sh = "sh"; | |
207bdbdb | 518 | |
86a5659e | 519 | /* Use our buffer's default directory for the subshell. */ |
c365c355 | 520 | if (chdir (str) != 0) |
32299e33 PE |
521 | { |
522 | #ifndef DOS_NT | |
c365c355 | 523 | emacs_perror (str); |
4ebbdd67 | 524 | _exit (EXIT_CANCELED); |
32299e33 PE |
525 | #endif |
526 | } | |
efa04277 | 527 | |
fe03522b | 528 | #ifdef MSDOS /* Demacs 1.1.2 91/10/20 Manabu Higashida */ |
c0917202 | 529 | { |
48178f9a EZ |
530 | char *epwd = getenv ("PWD"); |
531 | char old_pwd[MAXPATHLEN+1+4]; | |
c0917202 EZ |
532 | |
533 | /* If PWD is set, pass it with corrected value. */ | |
48178f9a | 534 | if (epwd) |
c0917202 | 535 | { |
48178f9a | 536 | strcpy (old_pwd, epwd); |
c0917202 EZ |
537 | setenv ("PWD", str, 1); |
538 | } | |
539 | st = system (sh); | |
32299e33 | 540 | chdir (oldwd); /* FIXME: Do the right thing on chdir failure. */ |
48178f9a | 541 | if (epwd) |
c0917202 EZ |
542 | putenv (old_pwd); /* restore previous value */ |
543 | } | |
207bdbdb | 544 | #else /* not MSDOS */ |
fe03522b | 545 | #ifdef WINDOWSNT |
fe03522b RS |
546 | /* Waits for process completion */ |
547 | pid = _spawnlp (_P_WAIT, sh, sh, NULL); | |
32299e33 | 548 | chdir (oldwd); /* FIXME: Do the right thing on chdir failure. */ |
fe03522b RS |
549 | if (pid == -1) |
550 | write (1, "Can't execute subshell", 22); | |
fe03522b | 551 | #else /* not WINDOWSNT */ |
e120ea40 | 552 | execlp (sh, sh, (char *) 0); |
4ebbdd67 PE |
553 | emacs_perror (sh); |
554 | _exit (errno == ENOENT ? EXIT_ENOENT : EXIT_CANNOT_INVOKE); | |
fe03522b | 555 | #endif /* not WINDOWSNT */ |
207bdbdb | 556 | #endif /* not MSDOS */ |
86a5659e JB |
557 | } |
558 | ||
718ca3cf | 559 | /* Do this now if we did not do it before. */ |
ed68db4d | 560 | #ifndef MSDOS |
86a5659e | 561 | save_signal_handlers (saved_handlers); |
718ca3cf RS |
562 | #endif |
563 | ||
ad00c243 | 564 | #ifndef DOS_NT |
bb5f74ee | 565 | wait_for_termination (pid, &status, 0); |
7964ba9e | 566 | #endif |
86a5659e | 567 | restore_signal_handlers (saved_handlers); |
86a5659e JB |
568 | } |
569 | ||
35a05cca | 570 | static void |
971de7fb | 571 | save_signal_handlers (struct save_signal *saved_handlers) |
86a5659e JB |
572 | { |
573 | while (saved_handlers->code) | |
574 | { | |
2fe28299 PE |
575 | struct sigaction action; |
576 | emacs_sigaction_init (&action, SIG_IGN); | |
577 | sigaction (saved_handlers->code, &action, &saved_handlers->action); | |
86a5659e JB |
578 | saved_handlers++; |
579 | } | |
580 | } | |
581 | ||
35a05cca | 582 | static void |
971de7fb | 583 | restore_signal_handlers (struct save_signal *saved_handlers) |
86a5659e JB |
584 | { |
585 | while (saved_handlers->code) | |
586 | { | |
2fe28299 | 587 | sigaction (saved_handlers->code, &saved_handlers->action, 0); |
86a5659e JB |
588 | saved_handlers++; |
589 | } | |
590 | } | |
591 | \f | |
4a4bbad2 | 592 | #ifdef USABLE_SIGIO |
d486344e | 593 | static int old_fcntl_flags[FD_SETSIZE]; |
4a4bbad2 | 594 | #endif |
86a5659e | 595 | |
08633194 | 596 | void |
971de7fb | 597 | init_sigio (int fd) |
86a5659e | 598 | { |
4a4bbad2 | 599 | #ifdef USABLE_SIGIO |
819b8f00 KL |
600 | old_fcntl_flags[fd] = fcntl (fd, F_GETFL, 0) & ~FASYNC; |
601 | fcntl (fd, F_SETFL, old_fcntl_flags[fd] | FASYNC); | |
23dab951 | 602 | interrupts_deferred = 0; |
4a4bbad2 | 603 | #endif |
86a5659e JB |
604 | } |
605 | ||
5af73b0f | 606 | #ifndef DOS_NT |
604efe86 | 607 | static void |
971de7fb | 608 | reset_sigio (int fd) |
86a5659e | 609 | { |
4a4bbad2 | 610 | #ifdef USABLE_SIGIO |
819b8f00 | 611 | fcntl (fd, F_SETFL, old_fcntl_flags[fd]); |
4d553a13 | 612 | #endif |
86a5659e | 613 | } |
5af73b0f | 614 | #endif |
86a5659e | 615 | |
08633194 | 616 | void |
971de7fb | 617 | request_sigio (void) |
86a5659e | 618 | { |
4a4bbad2 | 619 | #ifdef USABLE_SIGIO |
2fe28299 PE |
620 | sigset_t unblocked; |
621 | ||
6bbba5a6 | 622 | if (noninteractive) |
23dab951 RS |
623 | return; |
624 | ||
2fe28299 | 625 | sigemptyset (&unblocked); |
4a4bbad2 | 626 | # ifdef SIGWINCH |
2fe28299 | 627 | sigaddset (&unblocked, SIGWINCH); |
4a4bbad2 | 628 | # endif |
2fe28299 PE |
629 | sigaddset (&unblocked, SIGIO); |
630 | pthread_sigmask (SIG_UNBLOCK, &unblocked, 0); | |
86a5659e JB |
631 | |
632 | interrupts_deferred = 0; | |
4a4bbad2 | 633 | #endif |
86a5659e JB |
634 | } |
635 | ||
08633194 | 636 | void |
0a125897 | 637 | unrequest_sigio (void) |
cf84bb53 | 638 | { |
4a4bbad2 | 639 | #ifdef USABLE_SIGIO |
2fe28299 PE |
640 | sigset_t blocked; |
641 | ||
6bbba5a6 KL |
642 | if (noninteractive) |
643 | return; | |
644 | ||
2fe28299 | 645 | sigemptyset (&blocked); |
4a4bbad2 | 646 | # ifdef SIGWINCH |
2fe28299 | 647 | sigaddset (&blocked, SIGWINCH); |
4a4bbad2 | 648 | # endif |
2fe28299 PE |
649 | sigaddset (&blocked, SIGIO); |
650 | pthread_sigmask (SIG_BLOCK, &blocked, 0); | |
86a5659e | 651 | interrupts_deferred = 1; |
4a4bbad2 | 652 | #endif |
86a5659e | 653 | } |
177c0ea7 | 654 | |
08633194 | 655 | void |
4a4bbad2 | 656 | ignore_sigio (void) |
86a5659e | 657 | { |
4a4bbad2 PE |
658 | #ifdef USABLE_SIGIO |
659 | signal (SIGIO, SIG_IGN); | |
660 | #endif | |
86a5659e | 661 | } |
5c2b9423 PE |
662 | \f |
663 | #ifndef MSDOS | |
664 | /* Block SIGCHLD. */ | |
665 | ||
666 | void | |
667 | block_child_signal (sigset_t *oldset) | |
668 | { | |
669 | sigset_t blocked; | |
670 | sigemptyset (&blocked); | |
671 | sigaddset (&blocked, SIGCHLD); | |
672 | sigaddset (&blocked, SIGINT); | |
673 | pthread_sigmask (SIG_BLOCK, &blocked, oldset); | |
674 | } | |
675 | ||
676 | /* Unblock SIGCHLD. */ | |
677 | ||
678 | void | |
679 | unblock_child_signal (sigset_t const *oldset) | |
680 | { | |
681 | pthread_sigmask (SIG_SETMASK, oldset, 0); | |
682 | } | |
feb67dfe | 683 | |
5c2b9423 | 684 | #endif /* !MSDOS */ |
9ae8f997 | 685 | \f |
322aea6d PE |
686 | /* Saving and restoring the process group of Emacs's terminal. */ |
687 | ||
688 | /* The process group of which Emacs was a member when it initially | |
689 | started. | |
690 | ||
691 | If Emacs was in its own process group (i.e. inherited_pgroup == | |
692 | getpid ()), then we know we're running under a shell with job | |
693 | control (Emacs would never be run as part of a pipeline). | |
694 | Everything is fine. | |
695 | ||
696 | If Emacs was not in its own process group, then we know we're | |
697 | running under a shell (or a caller) that doesn't know how to | |
698 | separate itself from Emacs (like sh). Emacs must be in its own | |
699 | process group in order to receive SIGIO correctly. In this | |
700 | situation, we put ourselves in our own pgroup, forcibly set the | |
701 | tty's pgroup to our pgroup, and make sure to restore and reinstate | |
702 | the tty's pgroup just like any other terminal setting. If | |
703 | inherited_group was not the tty's pgroup, then we'll get a | |
704 | SIGTTmumble when we try to change the tty's pgroup, and a CONT if | |
705 | it goes foreground in the future, which is what should happen. */ | |
706 | ||
707 | static pid_t inherited_pgroup; | |
708 | ||
709 | void | |
710 | init_foreground_group (void) | |
711 | { | |
dd0333b6 | 712 | pid_t pgrp = getpgrp (); |
322aea6d PE |
713 | inherited_pgroup = getpid () == pgrp ? 0 : pgrp; |
714 | } | |
715 | ||
b8956427 PE |
716 | /* Block and unblock SIGTTOU. */ |
717 | ||
718 | void | |
1e952f0a | 719 | block_tty_out_signal (sigset_t *oldset) |
b8956427 PE |
720 | { |
721 | #ifdef SIGTTOU | |
722 | sigset_t blocked; | |
723 | sigemptyset (&blocked); | |
724 | sigaddset (&blocked, SIGTTOU); | |
1e952f0a | 725 | pthread_sigmask (SIG_BLOCK, &blocked, oldset); |
b8956427 PE |
726 | #endif |
727 | } | |
728 | ||
729 | void | |
1e952f0a | 730 | unblock_tty_out_signal (sigset_t const *oldset) |
b8956427 PE |
731 | { |
732 | #ifdef SIGTTOU | |
1e952f0a | 733 | pthread_sigmask (SIG_SETMASK, oldset, 0); |
b8956427 PE |
734 | #endif |
735 | } | |
736 | ||
322aea6d PE |
737 | /* Safely set a controlling terminal FD's process group to PGID. |
738 | If we are not in the foreground already, POSIX requires tcsetpgrp | |
739 | to deliver a SIGTTOU signal, which would stop us. This is an | |
740 | annoyance, so temporarily ignore the signal. | |
741 | ||
742 | In practice, platforms lacking SIGTTOU also lack tcsetpgrp, so | |
743 | skip all this unless SIGTTOU is defined. */ | |
744 | static void | |
745 | tcsetpgrp_without_stopping (int fd, pid_t pgid) | |
746 | { | |
747 | #ifdef SIGTTOU | |
1e952f0a | 748 | sigset_t oldset; |
322aea6d | 749 | block_input (); |
1e952f0a | 750 | block_tty_out_signal (&oldset); |
322aea6d | 751 | tcsetpgrp (fd, pgid); |
1e952f0a | 752 | unblock_tty_out_signal (&oldset); |
322aea6d PE |
753 | unblock_input (); |
754 | #endif | |
755 | } | |
756 | ||
757 | /* Split off the foreground process group to Emacs alone. When we are | |
758 | in the foreground, but not started in our own process group, | |
759 | redirect the tty device handle FD to point to our own process | |
760 | group. FD must be the file descriptor of the controlling tty. */ | |
761 | static void | |
762 | narrow_foreground_group (int fd) | |
763 | { | |
764 | if (inherited_pgroup && setpgid (0, 0) == 0) | |
765 | tcsetpgrp_without_stopping (fd, getpid ()); | |
766 | } | |
767 | ||
768 | /* Set the tty to our original foreground group. */ | |
769 | static void | |
770 | widen_foreground_group (int fd) | |
771 | { | |
772 | if (inherited_pgroup && setpgid (0, inherited_pgroup) == 0) | |
773 | tcsetpgrp_without_stopping (fd, inherited_pgroup); | |
774 | } | |
775 | \f | |
68936329 JB |
776 | /* Getting and setting emacs_tty structures. */ |
777 | ||
653d4f43 PE |
778 | /* Set *TC to the parameters associated with the terminal FD, |
779 | or clear it if the parameters are not available. */ | |
780 | static void | |
971de7fb | 781 | emacs_get_tty (int fd, struct emacs_tty *settings) |
68936329 JB |
782 | { |
783 | /* Retrieve the primary parameters - baud rate, character size, etcetera. */ | |
a7ebc409 | 784 | #ifndef DOS_NT |
68936329 | 785 | /* We have those nifty POSIX tcmumbleattr functions. */ |
72af86bd | 786 | memset (&settings->main, 0, sizeof (settings->main)); |
653d4f43 | 787 | tcgetattr (fd, &settings->main); |
68936329 | 788 | #endif |
68936329 JB |
789 | } |
790 | ||
791 | ||
792 | /* Set the parameters of the tty on FD according to the contents of | |
653d4f43 PE |
793 | *SETTINGS. If FLUSHP, discard input. |
794 | Return 0 if all went well, and -1 (setting errno) if anything failed. */ | |
394049ec | 795 | |
653d4f43 PE |
796 | static int |
797 | emacs_set_tty (int fd, struct emacs_tty *settings, bool flushp) | |
68936329 JB |
798 | { |
799 | /* Set the primary parameters - baud rate, character size, etcetera. */ | |
a7ebc409 | 800 | #ifndef DOS_NT |
e6cc3307 | 801 | int i; |
68936329 JB |
802 | /* We have those nifty POSIX tcmumbleattr functions. |
803 | William J. Smith <wjs@wiis.wang.com> writes: | |
c4ea52a6 | 804 | "POSIX 1003.1 defines tcsetattr to return success if it was |
68936329 JB |
805 | able to perform any of the requested actions, even if some |
806 | of the requested actions could not be performed. | |
807 | We must read settings back to ensure tty setup properly. | |
808 | AIX requires this to keep tty from hanging occasionally." */ | |
eb8c3be9 | 809 | /* This make sure that we don't loop indefinitely in here. */ |
e6cc3307 | 810 | for (i = 0 ; i < 10 ; i++) |
394049ec | 811 | if (tcsetattr (fd, flushp ? TCSAFLUSH : TCSADRAIN, &settings->main) < 0) |
68936329 JB |
812 | { |
813 | if (errno == EINTR) | |
814 | continue; | |
815 | else | |
816 | return -1; | |
817 | } | |
818 | else | |
819 | { | |
820 | struct termios new; | |
821 | ||
72af86bd | 822 | memset (&new, 0, sizeof (new)); |
68936329 JB |
823 | /* Get the current settings, and see if they're what we asked for. */ |
824 | tcgetattr (fd, &new); | |
e6cc3307 RS |
825 | /* We cannot use memcmp on the whole structure here because under |
826 | * aix386 the termios structure has some reserved field that may | |
827 | * not be filled in. | |
828 | */ | |
829 | if ( new.c_iflag == settings->main.c_iflag | |
830 | && new.c_oflag == settings->main.c_oflag | |
831 | && new.c_cflag == settings->main.c_cflag | |
832 | && new.c_lflag == settings->main.c_lflag | |
c4ea52a6 | 833 | && memcmp (new.c_cc, settings->main.c_cc, NCCS) == 0) |
68936329 | 834 | break; |
e6cc3307 RS |
835 | else |
836 | continue; | |
68936329 | 837 | } |
68936329 | 838 | #endif |
177c0ea7 | 839 | |
68936329 JB |
840 | /* We have survived the tempest. */ |
841 | return 0; | |
842 | } | |
843 | ||
844 | \f | |
86a5659e JB |
845 | |
846 | #ifdef F_SETOWN | |
d486344e | 847 | static int old_fcntl_owner[FD_SETSIZE]; |
86a5659e JB |
848 | #endif /* F_SETOWN */ |
849 | ||
86a5659e JB |
850 | /* This may also be defined in stdio, |
851 | but if so, this does no harm, | |
852 | and using the same name avoids wasting the other one's space. */ | |
853 | ||
9d9a7716 | 854 | #if defined (USG) |
86a5659e JB |
855 | unsigned char _sobuf[BUFSIZ+8]; |
856 | #else | |
857 | char _sobuf[BUFSIZ]; | |
858 | #endif | |
177c0ea7 | 859 | |
da8e1115 KL |
860 | /* Initialize the terminal mode on all tty devices that are currently |
861 | open. */ | |
862 | ||
08633194 | 863 | void |
28d440ab KL |
864 | init_all_sys_modes (void) |
865 | { | |
28d7d09f | 866 | struct tty_display_info *tty; |
16c290d8 | 867 | for (tty = tty_list; tty; tty = tty->next) |
28d440ab | 868 | init_sys_modes (tty); |
28d440ab KL |
869 | } |
870 | ||
da8e1115 KL |
871 | /* Initialize the terminal mode on the given tty device. */ |
872 | ||
28d440ab | 873 | void |
971de7fb | 874 | init_sys_modes (struct tty_display_info *tty_out) |
86a5659e | 875 | { |
91bac16a | 876 | struct emacs_tty tty; |
e112cc37 | 877 | Lisp_Object terminal; |
91bac16a | 878 | |
4ec5cb58 RS |
879 | Vtty_erase_char = Qnil; |
880 | ||
86a5659e JB |
881 | if (noninteractive) |
882 | return; | |
883 | ||
0b0d3e0b KL |
884 | if (!tty_out->output) |
885 | return; /* The tty is suspended. */ | |
cf84bb53 | 886 | |
322aea6d PE |
887 | narrow_foreground_group (fileno (tty_out->input)); |
888 | ||
2246281f | 889 | if (! tty_out->old_tty) |
38182d90 | 890 | tty_out->old_tty = xmalloc (sizeof *tty_out->old_tty); |
cf84bb53 | 891 | |
12e610e8 | 892 | emacs_get_tty (fileno (tty_out->input), tty_out->old_tty); |
23dab951 | 893 | |
2246281f | 894 | tty = *tty_out->old_tty; |
86a5659e | 895 | |
a7ebc409 | 896 | #if !defined (DOS_NT) |
2246281f | 897 | XSETINT (Vtty_erase_char, tty.main.c_cc[VERASE]); |
4ec5cb58 | 898 | |
2246281f KL |
899 | tty.main.c_iflag |= (IGNBRK); /* Ignore break condition */ |
900 | tty.main.c_iflag &= ~ICRNL; /* Disable map of CR to NL on input */ | |
7f371164 RS |
901 | #ifdef INLCR /* I'm just being cautious, |
902 | since I can't check how widespread INLCR is--rms. */ | |
2246281f | 903 | tty.main.c_iflag &= ~INLCR; /* Disable map of NL to CR on input */ |
7f371164 | 904 | #endif |
86a5659e | 905 | #ifdef ISTRIP |
2246281f | 906 | tty.main.c_iflag &= ~ISTRIP; /* don't strip 8th bit on input */ |
86a5659e | 907 | #endif |
2246281f KL |
908 | tty.main.c_lflag &= ~ECHO; /* Disable echo */ |
909 | tty.main.c_lflag &= ~ICANON; /* Disable erase/kill processing */ | |
e2b40c23 | 910 | #ifdef IEXTEN |
2246281f | 911 | tty.main.c_lflag &= ~IEXTEN; /* Disable other editing characters. */ |
e2b40c23 | 912 | #endif |
2246281f KL |
913 | tty.main.c_lflag |= ISIG; /* Enable signals */ |
914 | if (tty_out->flow_control) | |
915 | { | |
916 | tty.main.c_iflag |= IXON; /* Enable start/stop output control */ | |
86a5659e | 917 | #ifdef IXANY |
2246281f | 918 | tty.main.c_iflag &= ~IXANY; |
86a5659e | 919 | #endif /* IXANY */ |
2246281f KL |
920 | } |
921 | else | |
922 | tty.main.c_iflag &= ~IXON; /* Disable start/stop output control */ | |
923 | tty.main.c_oflag &= ~ONLCR; /* Disable map of NL to CR-NL | |
924 | on output */ | |
925 | tty.main.c_oflag &= ~TAB3; /* Disable tab expansion */ | |
86a5659e | 926 | #ifdef CS8 |
2246281f KL |
927 | if (tty_out->meta_key) |
928 | { | |
929 | tty.main.c_cflag |= CS8; /* allow 8th bit on input */ | |
930 | tty.main.c_cflag &= ~PARENB;/* Don't check parity */ | |
931 | } | |
86a5659e | 932 | #endif |
e112cc37 ET |
933 | |
934 | XSETTERMINAL(terminal, tty_out->terminal); | |
935 | if (!NILP (Fcontrolling_tty_p (terminal))) | |
2246281f KL |
936 | { |
937 | tty.main.c_cc[VINTR] = quit_char; /* C-g (usually) gives SIGINT */ | |
938 | /* Set up C-g for both SIGQUIT and SIGINT. | |
939 | We don't know which we will get, but we handle both alike | |
940 | so which one it really gives us does not matter. */ | |
941 | tty.main.c_cc[VQUIT] = quit_char; | |
942 | } | |
943 | else | |
944 | { | |
945 | /* We normally don't get interrupt or quit signals from tty | |
946 | devices other than our controlling terminal; therefore, | |
947 | we must handle C-g as normal input. Unfortunately, this | |
948 | means that the interrupt and quit feature must be | |
949 | disabled on secondary ttys, or we would not even see the | |
950 | keypress. | |
cf84bb53 | 951 | |
2246281f KL |
952 | Note that even though emacsclient could have special code |
953 | to pass SIGINT to Emacs, we should _not_ enable | |
954 | interrupt/quit keys for emacsclient frames. This means | |
955 | that we can't break out of loops in C code from a | |
956 | secondary tty frame, but we can always decide what | |
957 | display the C-g came from, which is more important from a | |
958 | usability point of view. (Consider the case when two | |
959 | people work together using the same Emacs instance.) */ | |
960 | tty.main.c_cc[VINTR] = CDISABLE; | |
961 | tty.main.c_cc[VQUIT] = CDISABLE; | |
962 | } | |
963 | tty.main.c_cc[VMIN] = 1; /* Input should wait for at least 1 char */ | |
964 | tty.main.c_cc[VTIME] = 0; /* no matter how long that takes. */ | |
86a5659e | 965 | #ifdef VSWTCH |
2246281f | 966 | tty.main.c_cc[VSWTCH] = CDISABLE; /* Turn off shell layering use |
91bac16a | 967 | of C-z */ |
86a5659e | 968 | #endif /* VSWTCH */ |
cf84bb53 | 969 | |
86a5659e | 970 | #ifdef VSUSP |
a7ebc409 | 971 | tty.main.c_cc[VSUSP] = CDISABLE; /* Turn off handling of C-z. */ |
86a5659e JB |
972 | #endif /* VSUSP */ |
973 | #ifdef V_DSUSP | |
a7ebc409 | 974 | tty.main.c_cc[V_DSUSP] = CDISABLE; /* Turn off handling of C-y. */ |
86a5659e | 975 | #endif /* V_DSUSP */ |
e2b40c23 | 976 | #ifdef VDSUSP /* Some systems have VDSUSP, some have V_DSUSP. */ |
2246281f | 977 | tty.main.c_cc[VDSUSP] = CDISABLE; |
e2b40c23 | 978 | #endif /* VDSUSP */ |
92c995de | 979 | #ifdef VLNEXT |
2246281f | 980 | tty.main.c_cc[VLNEXT] = CDISABLE; |
92c995de RS |
981 | #endif /* VLNEXT */ |
982 | #ifdef VREPRINT | |
2246281f | 983 | tty.main.c_cc[VREPRINT] = CDISABLE; |
92c995de RS |
984 | #endif /* VREPRINT */ |
985 | #ifdef VWERASE | |
2246281f | 986 | tty.main.c_cc[VWERASE] = CDISABLE; |
92c995de RS |
987 | #endif /* VWERASE */ |
988 | #ifdef VDISCARD | |
2246281f | 989 | tty.main.c_cc[VDISCARD] = CDISABLE; |
92c995de | 990 | #endif /* VDISCARD */ |
c179a6d1 | 991 | |
2246281f KL |
992 | if (tty_out->flow_control) |
993 | { | |
421dd92f | 994 | #ifdef VSTART |
2246281f | 995 | tty.main.c_cc[VSTART] = '\021'; |
421dd92f RS |
996 | #endif /* VSTART */ |
997 | #ifdef VSTOP | |
2246281f | 998 | tty.main.c_cc[VSTOP] = '\023'; |
421dd92f | 999 | #endif /* VSTOP */ |
2246281f KL |
1000 | } |
1001 | else | |
1002 | { | |
c179a6d1 | 1003 | #ifdef VSTART |
2246281f | 1004 | tty.main.c_cc[VSTART] = CDISABLE; |
c179a6d1 RS |
1005 | #endif /* VSTART */ |
1006 | #ifdef VSTOP | |
2246281f | 1007 | tty.main.c_cc[VSTOP] = CDISABLE; |
c179a6d1 | 1008 | #endif /* VSTOP */ |
2246281f | 1009 | } |
c179a6d1 | 1010 | |
86a5659e | 1011 | #ifdef AIX |
f5272227 KL |
1012 | tty.main.c_cc[VSTRT] = CDISABLE; |
1013 | tty.main.c_cc[VSTOP] = CDISABLE; | |
1014 | tty.main.c_cc[VSUSP] = CDISABLE; | |
1015 | tty.main.c_cc[VDSUSP] = CDISABLE; | |
2246281f KL |
1016 | if (tty_out->flow_control) |
1017 | { | |
ac567c95 | 1018 | #ifdef VSTART |
2246281f | 1019 | tty.main.c_cc[VSTART] = '\021'; |
ac567c95 RS |
1020 | #endif /* VSTART */ |
1021 | #ifdef VSTOP | |
2246281f | 1022 | tty.main.c_cc[VSTOP] = '\023'; |
ac567c95 | 1023 | #endif /* VSTOP */ |
2246281f KL |
1024 | } |
1025 | /* Also, PTY overloads NUL and BREAK. | |
1026 | don't ignore break, but don't signal either, so it looks like NUL. | |
1027 | This really serves a purpose only if running in an XTERM window | |
1028 | or via TELNET or the like, but does no harm elsewhere. */ | |
1029 | tty.main.c_iflag &= ~IGNBRK; | |
1030 | tty.main.c_iflag &= ~BRKINT; | |
86a5659e | 1031 | #endif |
fe03522b | 1032 | #endif /* not DOS_NT */ |
cf84bb53 | 1033 | |
207bdbdb | 1034 | #ifdef MSDOS /* Demacs 1.1.2 91/10/20 Manabu Higashida, MW Aug 1993 */ |
2246281f KL |
1035 | if (!tty_out->term_initted) |
1036 | internal_terminal_init (); | |
4e389d32 | 1037 | dos_ttraw (tty_out); |
207bdbdb | 1038 | #endif |
91bac16a | 1039 | |
12e610e8 | 1040 | emacs_set_tty (fileno (tty_out->input), &tty, 0); |
86a5659e | 1041 | |
2246281f KL |
1042 | /* This code added to insure that, if flow-control is not to be used, |
1043 | we have an unlocked terminal at the start. */ | |
91bac16a | 1044 | |
86a5659e | 1045 | #ifdef TCXONC |
0b0d3e0b | 1046 | if (!tty_out->flow_control) ioctl (fileno (tty_out->input), TCXONC, 1); |
86a5659e | 1047 | #endif |
86a5659e | 1048 | #ifdef TIOCSTART |
0b0d3e0b | 1049 | if (!tty_out->flow_control) ioctl (fileno (tty_out->input), TIOCSTART, 0); |
86a5659e | 1050 | #endif |
86a5659e | 1051 | |
a7ebc409 | 1052 | #if !defined (DOS_NT) |
51417996 | 1053 | #ifdef TCOON |
0b0d3e0b | 1054 | if (!tty_out->flow_control) tcflow (fileno (tty_out->input), TCOON); |
d228f207 | 1055 | #endif |
51417996 | 1056 | #endif |
d228f207 | 1057 | |
49cdacda | 1058 | #ifdef F_GETOWN |
2246281f | 1059 | if (interrupt_input) |
86a5659e | 1060 | { |
0b0d3e0b KL |
1061 | old_fcntl_owner[fileno (tty_out->input)] = |
1062 | fcntl (fileno (tty_out->input), F_GETOWN, 0); | |
1063 | fcntl (fileno (tty_out->input), F_SETOWN, getpid ()); | |
1064 | init_sigio (fileno (tty_out->input)); | |
7e5a23bd | 1065 | #ifdef HAVE_GPM |
75a8734b | 1066 | if (gpm_tty == tty_out) |
3e748bcb | 1067 | { |
75a8734b | 1068 | /* Arrange for mouse events to give us SIGIO signals. */ |
3e748bcb | 1069 | fcntl (gpm_fd, F_SETOWN, getpid ()); |
57669cf1 | 1070 | fcntl (gpm_fd, F_SETFL, fcntl (gpm_fd, F_GETFL, 0) | O_NONBLOCK); |
3e748bcb NR |
1071 | init_sigio (gpm_fd); |
1072 | } | |
7e5a23bd | 1073 | #endif /* HAVE_GPM */ |
86a5659e JB |
1074 | } |
1075 | #endif /* F_GETOWN */ | |
86a5659e | 1076 | |
86a5659e JB |
1077 | #ifdef _IOFBF |
1078 | /* This symbol is defined on recent USG systems. | |
1079 | Someone says without this call USG won't really buffer the file | |
1080 | even with a call to setbuf. */ | |
0b0d3e0b | 1081 | setvbuf (tty_out->output, (char *) _sobuf, _IOFBF, sizeof _sobuf); |
86a5659e | 1082 | #else |
0b0d3e0b | 1083 | setbuf (tty_out->output, (char *) _sobuf); |
86a5659e | 1084 | #endif |
4d553a13 | 1085 | |
69fb5031 JR |
1086 | if (tty_out->terminal->set_terminal_modes_hook) |
1087 | tty_out->terminal->set_terminal_modes_hook (tty_out->terminal); | |
4b311aaf | 1088 | |
9628b887 KL |
1089 | if (!tty_out->term_initted) |
1090 | { | |
1091 | Lisp_Object tail, frame; | |
1092 | FOR_EACH_FRAME (tail, frame) | |
1093 | { | |
daf01701 | 1094 | /* XXX This needs to be revised. */ |
9628b887 KL |
1095 | if (FRAME_TERMCAP_P (XFRAME (frame)) |
1096 | && FRAME_TTY (XFRAME (frame)) == tty_out) | |
1097 | init_frame_faces (XFRAME (frame)); | |
1098 | } | |
1099 | } | |
045942b2 | 1100 | |
9628b887 | 1101 | if (tty_out->term_initted && no_redraw_on_reenter) |
86a5659e | 1102 | { |
855a0da7 SM |
1103 | /* We used to call "direct_output_forward_char(0)" here, |
1104 | but it's not clear why, since it may not do anything anyway. */ | |
86a5659e JB |
1105 | } |
1106 | else | |
1107 | { | |
9628b887 | 1108 | Lisp_Object tail, frame; |
0137dbf7 | 1109 | frame_garbaged = 1; |
9628b887 KL |
1110 | FOR_EACH_FRAME (tail, frame) |
1111 | { | |
7ab98847 EZ |
1112 | if ((FRAME_TERMCAP_P (XFRAME (frame)) |
1113 | || FRAME_MSDOS_P (XFRAME (frame))) | |
9628b887 KL |
1114 | && FRAME_TTY (XFRAME (frame)) == tty_out) |
1115 | FRAME_GARBAGED_P (XFRAME (frame)) = 1; | |
1116 | } | |
86a5659e | 1117 | } |
91bac16a | 1118 | |
9628b887 | 1119 | tty_out->term_initted = 1; |
86a5659e JB |
1120 | } |
1121 | ||
653d4f43 | 1122 | /* Return true if safe to use tabs in output. |
86a5659e | 1123 | At the time this is called, init_sys_modes has not been done yet. */ |
177c0ea7 | 1124 | |
653d4f43 | 1125 | bool |
16c290d8 | 1126 | tabs_safe_p (int fd) |
86a5659e | 1127 | { |
6548cf00 | 1128 | struct emacs_tty etty; |
91bac16a | 1129 | |
12e610e8 DN |
1130 | emacs_get_tty (fd, &etty); |
1131 | #ifndef DOS_NT | |
1132 | #ifdef TABDLY | |
1133 | return ((etty.main.c_oflag & TABDLY) != TAB3); | |
1134 | #else /* not TABDLY */ | |
1135 | return 1; | |
1136 | #endif /* not TABDLY */ | |
1137 | #else /* DOS_NT */ | |
1138 | return 0; | |
1139 | #endif /* DOS_NT */ | |
86a5659e | 1140 | } |
73d5358f | 1141 | \f |
86a5659e | 1142 | /* Get terminal size from system. |
73d5358f RS |
1143 | Store number of lines into *HEIGHTP and width into *WIDTHP. |
1144 | We store 0 if there's no valid information. */ | |
86a5659e | 1145 | |
08633194 | 1146 | void |
16c290d8 | 1147 | get_tty_size (int fd, int *widthp, int *heightp) |
86a5659e | 1148 | { |
e16e55d4 | 1149 | #if defined TIOCGWINSZ |
91bac16a JB |
1150 | |
1151 | /* BSD-style. */ | |
86a5659e | 1152 | struct winsize size; |
91bac16a | 1153 | |
16c290d8 | 1154 | if (ioctl (fd, TIOCGWINSZ, &size) == -1) |
91bac16a JB |
1155 | *widthp = *heightp = 0; |
1156 | else | |
1157 | { | |
1158 | *widthp = size.ws_col; | |
1159 | *heightp = size.ws_row; | |
1160 | } | |
1161 | ||
e16e55d4 | 1162 | #elif defined TIOCGSIZE |
91bac16a JB |
1163 | |
1164 | /* SunOS - style. */ | |
177c0ea7 | 1165 | struct ttysize size; |
91bac16a | 1166 | |
16c290d8 | 1167 | if (ioctl (fd, TIOCGSIZE, &size) == -1) |
91bac16a JB |
1168 | *widthp = *heightp = 0; |
1169 | else | |
1170 | { | |
1171 | *widthp = size.ts_cols; | |
1172 | *heightp = size.ts_lines; | |
1173 | } | |
1174 | ||
e16e55d4 JB |
1175 | #elif defined WINDOWSNT |
1176 | ||
1177 | CONSOLE_SCREEN_BUFFER_INFO info; | |
1178 | if (GetConsoleScreenBufferInfo (GetStdHandle (STD_OUTPUT_HANDLE), &info)) | |
1179 | { | |
1180 | *widthp = info.srWindow.Right - info.srWindow.Left + 1; | |
1181 | *heightp = info.srWindow.Bottom - info.srWindow.Top + 1; | |
1182 | } | |
1183 | else | |
1184 | *widthp = *heightp = 0; | |
1185 | ||
1186 | #elif defined MSDOS | |
1187 | ||
207bdbdb RS |
1188 | *widthp = ScreenCols (); |
1189 | *heightp = ScreenRows (); | |
e16e55d4 | 1190 | |
86a5659e | 1191 | #else /* system doesn't know size */ |
e16e55d4 | 1192 | |
86a5659e JB |
1193 | *widthp = 0; |
1194 | *heightp = 0; | |
e16e55d4 | 1195 | |
207bdbdb | 1196 | #endif |
86a5659e | 1197 | } |
91bac16a | 1198 | |
73d5358f | 1199 | /* Set the logical window size associated with descriptor FD |
9c05bccf PE |
1200 | to HEIGHT and WIDTH. This is used mainly with ptys. |
1201 | Return a negative value on failure. */ | |
73d5358f RS |
1202 | |
1203 | int | |
971de7fb | 1204 | set_window_size (int fd, int height, int width) |
73d5358f RS |
1205 | { |
1206 | #ifdef TIOCSWINSZ | |
1207 | ||
1208 | /* BSD-style. */ | |
1209 | struct winsize size; | |
1210 | size.ws_row = height; | |
1211 | size.ws_col = width; | |
1212 | ||
9c05bccf | 1213 | return ioctl (fd, TIOCSWINSZ, &size); |
73d5358f RS |
1214 | |
1215 | #else | |
1216 | #ifdef TIOCSSIZE | |
1217 | ||
1218 | /* SunOS - style. */ | |
177c0ea7 | 1219 | struct ttysize size; |
73d5358f RS |
1220 | size.ts_lines = height; |
1221 | size.ts_cols = width; | |
1222 | ||
9c05bccf | 1223 | return ioctl (fd, TIOCGSIZE, &size); |
73d5358f RS |
1224 | #else |
1225 | return -1; | |
1226 | #endif /* not SunOS-style */ | |
1227 | #endif /* not BSD-style */ | |
1228 | } | |
1229 | ||
86a5659e | 1230 | \f |
da8e1115 KL |
1231 | |
1232 | /* Prepare all terminal devices for exiting Emacs. */ | |
1233 | ||
28d440ab KL |
1234 | void |
1235 | reset_all_sys_modes (void) | |
1236 | { | |
28d7d09f | 1237 | struct tty_display_info *tty; |
16c290d8 | 1238 | for (tty = tty_list; tty; tty = tty->next) |
28d440ab | 1239 | reset_sys_modes (tty); |
28d440ab KL |
1240 | } |
1241 | ||
0a125897 | 1242 | /* Prepare the terminal for closing it; move the cursor to the |
0137dbf7 | 1243 | bottom of the frame, turn off interrupt-driven I/O, etc. */ |
da8e1115 | 1244 | |
08633194 | 1245 | void |
971de7fb | 1246 | reset_sys_modes (struct tty_display_info *tty_out) |
86a5659e JB |
1247 | { |
1248 | if (noninteractive) | |
1249 | { | |
1250 | fflush (stdout); | |
1251 | return; | |
1252 | } | |
9628b887 | 1253 | if (!tty_out->term_initted) |
86a5659e | 1254 | return; |
da8e1115 | 1255 | |
0b0d3e0b KL |
1256 | if (!tty_out->output) |
1257 | return; /* The tty is suspended. */ | |
cf84bb53 | 1258 | |
da8e1115 KL |
1259 | /* Go to and clear the last line of the terminal. */ |
1260 | ||
0a125897 | 1261 | cmgoto (tty_out, FrameRows (tty_out) - 1, 0); |
cf84bb53 | 1262 | |
da8e1115 KL |
1263 | /* Code adapted from tty_clear_end_of_line. */ |
1264 | if (tty_out->TS_clr_line) | |
1265 | { | |
1266 | emacs_tputs (tty_out, tty_out->TS_clr_line, 1, cmputc); | |
1267 | } | |
1268 | else | |
1269 | { /* have to do it the hard way */ | |
1270 | int i; | |
ed8dad6b | 1271 | tty_turn_off_insert (tty_out); |
cf84bb53 | 1272 | |
da8e1115 | 1273 | for (i = curX (tty_out); i < FrameCols (tty_out) - 1; i++) |
0b0d3e0b KL |
1274 | { |
1275 | fputc (' ', tty_out->output); | |
1276 | } | |
da8e1115 | 1277 | } |
cf84bb53 | 1278 | |
0a125897 | 1279 | cmgoto (tty_out, FrameRows (tty_out) - 1, 0); |
819b8f00 | 1280 | fflush (tty_out->output); |
cf84bb53 | 1281 | |
69fb5031 JR |
1282 | if (tty_out->terminal->reset_terminal_modes_hook) |
1283 | tty_out->terminal->reset_terminal_modes_hook (tty_out->terminal); | |
2f98e6e3 | 1284 | |
86a5659e | 1285 | /* Avoid possible loss of output when changing terminal modes. */ |
47d7532e PE |
1286 | while (fdatasync (fileno (tty_out->output)) != 0 && errno == EINTR) |
1287 | continue; | |
91bac16a | 1288 | |
49cdacda PE |
1289 | #ifndef DOS_NT |
1290 | #ifdef F_SETOWN | |
86a5659e JB |
1291 | if (interrupt_input) |
1292 | { | |
0b0d3e0b KL |
1293 | reset_sigio (fileno (tty_out->input)); |
1294 | fcntl (fileno (tty_out->input), F_SETOWN, | |
1295 | old_fcntl_owner[fileno (tty_out->input)]); | |
86a5659e JB |
1296 | } |
1297 | #endif /* F_SETOWN */ | |
0b0d3e0b | 1298 | fcntl (fileno (tty_out->input), F_SETFL, |
49cdacda | 1299 | fcntl (fileno (tty_out->input), F_GETFL, 0) & ~O_NONBLOCK); |
a6b00318 | 1300 | #endif |
91bac16a | 1301 | |
fca177d4 | 1302 | if (tty_out->old_tty) |
12e610e8 | 1303 | while (emacs_set_tty (fileno (tty_out->input), |
fca177d4 | 1304 | tty_out->old_tty, 0) < 0 && errno == EINTR) |
7e32a4fb | 1305 | ; |
86a5659e | 1306 | |
207bdbdb RS |
1307 | #ifdef MSDOS /* Demacs 1.1.2 91/10/20 Manabu Higashida */ |
1308 | dos_ttcooked (); | |
1309 | #endif | |
1310 | ||
322aea6d | 1311 | widen_foreground_group (fileno (tty_out->input)); |
86a5659e JB |
1312 | } |
1313 | \f | |
1314 | #ifdef HAVE_PTYS | |
1315 | ||
1316 | /* Set up the proper status flags for use of a pty. */ | |
1317 | ||
08633194 | 1318 | void |
971de7fb | 1319 | setup_pty (int fd) |
86a5659e JB |
1320 | { |
1321 | /* I'm told that TOICREMOTE does not mean control chars | |
1322 | "can't be sent" but rather that they don't have | |
1323 | input-editing or signaling effects. | |
1324 | That should be good, because we have other ways | |
1325 | to do those things in Emacs. | |
1326 | However, telnet mode seems not to work on 4.2. | |
1327 | So TIOCREMOTE is turned off now. */ | |
1328 | ||
1329 | /* Under hp-ux, if TIOCREMOTE is turned on, some calls | |
1330 | will hang. In particular, the "timeout" feature (which | |
1331 | causes a read to return if there is no data available) | |
1332 | does this. Also it is known that telnet mode will hang | |
1333 | in such a way that Emacs must be stopped (perhaps this | |
1334 | is the same problem). | |
177c0ea7 | 1335 | |
86a5659e JB |
1336 | If TIOCREMOTE is turned off, then there is a bug in |
1337 | hp-ux which sometimes loses data. Apparently the | |
1338 | code which blocks the master process when the internal | |
1339 | buffer fills up does not work. Other than this, | |
1340 | though, everything else seems to work fine. | |
177c0ea7 | 1341 | |
86a5659e JB |
1342 | Since the latter lossage is more benign, we may as well |
1343 | lose that way. -- cph */ | |
1344 | #ifdef FIONBIO | |
5e617bc2 | 1345 | #if defined (UNIX98_PTYS) |
86a5659e JB |
1346 | { |
1347 | int on = 1; | |
1348 | ioctl (fd, FIONBIO, &on); | |
1349 | } | |
1350 | #endif | |
1351 | #endif | |
86a5659e JB |
1352 | } |
1353 | #endif /* HAVE_PTYS */ | |
1354 | \f | |
f8a80313 RS |
1355 | #ifdef HAVE_SOCKETS |
1356 | #include <sys/socket.h> | |
1357 | #include <netdb.h> | |
1358 | #endif /* HAVE_SOCKETS */ | |
f8a80313 | 1359 | |
8581cd64 KH |
1360 | #ifdef TRY_AGAIN |
1361 | #ifndef HAVE_H_ERRNO | |
1362 | extern int h_errno; | |
1363 | #endif | |
1364 | #endif /* TRY_AGAIN */ | |
1365 | ||
c0c86835 | 1366 | void |
971de7fb | 1367 | init_system_name (void) |
86a5659e | 1368 | { |
210b2b4f | 1369 | #ifndef HAVE_GETHOSTNAME |
c0c86835 KH |
1370 | struct utsname uts; |
1371 | uname (&uts); | |
1372 | Vsystem_name = build_string (uts.nodename); | |
67004ffb | 1373 | #else /* HAVE_GETHOSTNAME */ |
653d4f43 PE |
1374 | char *hostname_alloc = NULL; |
1375 | char hostname_buf[256]; | |
1376 | ptrdiff_t hostname_size = sizeof hostname_buf; | |
1377 | char *hostname = hostname_buf; | |
c0c86835 KH |
1378 | |
1379 | /* Try to get the host name; if the buffer is too short, try | |
1380 | again. Apparently, the only indication gethostname gives of | |
1381 | whether the buffer was large enough is the presence or absence | |
1382 | of a '\0' in the string. Eech. */ | |
1383 | for (;;) | |
1384 | { | |
1385 | gethostname (hostname, hostname_size - 1); | |
1386 | hostname[hostname_size - 1] = '\0'; | |
1387 | ||
1388 | /* Was the buffer large enough for the '\0'? */ | |
1389 | if (strlen (hostname) < hostname_size - 1) | |
1390 | break; | |
1391 | ||
653d4f43 PE |
1392 | hostname = hostname_alloc = xpalloc (hostname_alloc, &hostname_size, 1, |
1393 | min (PTRDIFF_MAX, SIZE_MAX), 1); | |
c0c86835 | 1394 | } |
67004ffb | 1395 | #ifdef HAVE_SOCKETS |
c0c86835 KH |
1396 | /* Turn the hostname into the official, fully-qualified hostname. |
1397 | Don't do this if we're going to dump; this can confuse system | |
1398 | libraries on some machines and make the dumped emacs core dump. */ | |
67004ffb | 1399 | #ifndef CANNOT_DUMP |
c0c86835 | 1400 | if (initialized) |
67004ffb | 1401 | #endif /* not CANNOT_DUMP */ |
8966b757 | 1402 | if (! strchr (hostname, '.')) |
960d894c | 1403 | { |
960d894c | 1404 | int count; |
3d66b985 JD |
1405 | #ifdef HAVE_GETADDRINFO |
1406 | struct addrinfo *res; | |
1407 | struct addrinfo hints; | |
1408 | int ret; | |
1409 | ||
cf84bb53 | 1410 | memset (&hints, 0, sizeof (hints)); |
3d66b985 JD |
1411 | hints.ai_socktype = SOCK_STREAM; |
1412 | hints.ai_flags = AI_CANONNAME; | |
1413 | ||
960d894c KH |
1414 | for (count = 0;; count++) |
1415 | { | |
3d66b985 JD |
1416 | if ((ret = getaddrinfo (hostname, NULL, &hints, &res)) == 0 |
1417 | || ret != EAI_AGAIN) | |
1418 | break; | |
1419 | ||
1420 | if (count >= 5) | |
1421 | break; | |
1422 | Fsleep_for (make_number (1), Qnil); | |
1423 | } | |
1424 | ||
1425 | if (ret == 0) | |
1426 | { | |
1427 | struct addrinfo *it = res; | |
1428 | while (it) | |
1429 | { | |
1430 | char *fqdn = it->ai_canonname; | |
8966b757 | 1431 | if (fqdn && strchr (fqdn, '.') |
3d66b985 JD |
1432 | && strcmp (fqdn, "localhost.localdomain") != 0) |
1433 | break; | |
1434 | it = it->ai_next; | |
1435 | } | |
1436 | if (it) | |
1437 | { | |
653d4f43 PE |
1438 | ptrdiff_t len = strlen (it->ai_canonname); |
1439 | if (hostname_size <= len) | |
1440 | { | |
1441 | hostname_size = len + 1; | |
1442 | hostname = hostname_alloc = xrealloc (hostname_alloc, | |
1443 | hostname_size); | |
1444 | } | |
3d66b985 JD |
1445 | strcpy (hostname, it->ai_canonname); |
1446 | } | |
1447 | freeaddrinfo (res); | |
1448 | } | |
1449 | #else /* !HAVE_GETADDRINFO */ | |
1450 | struct hostent *hp; | |
1451 | for (count = 0;; count++) | |
1452 | { | |
1453 | ||
e24f1d55 | 1454 | #ifdef TRY_AGAIN |
960d894c | 1455 | h_errno = 0; |
e24f1d55 | 1456 | #endif |
960d894c | 1457 | hp = gethostbyname (hostname); |
efa04277 | 1458 | #ifdef TRY_AGAIN |
960d894c KH |
1459 | if (! (hp == 0 && h_errno == TRY_AGAIN)) |
1460 | #endif | |
3d66b985 | 1461 | |
960d894c | 1462 | break; |
3d66b985 | 1463 | |
960d894c KH |
1464 | if (count >= 5) |
1465 | break; | |
1466 | Fsleep_for (make_number (1), Qnil); | |
1467 | } | |
3d66b985 | 1468 | |
960d894c KH |
1469 | if (hp) |
1470 | { | |
1471 | char *fqdn = (char *) hp->h_name; | |
960d894c | 1472 | |
8966b757 | 1473 | if (!strchr (fqdn, '.')) |
960d894c KH |
1474 | { |
1475 | /* We still don't have a fully qualified domain name. | |
1476 | Try to find one in the list of alternate names */ | |
1477 | char **alias = hp->h_aliases; | |
923721f4 | 1478 | while (*alias |
8966b757 | 1479 | && (!strchr (*alias, '.') |
923721f4 | 1480 | || !strcmp (*alias, "localhost.localdomain"))) |
960d894c KH |
1481 | alias++; |
1482 | if (*alias) | |
1483 | fqdn = *alias; | |
1484 | } | |
1485 | hostname = fqdn; | |
960d894c | 1486 | } |
3d66b985 | 1487 | #endif /* !HAVE_GETADDRINFO */ |
960d894c | 1488 | } |
67004ffb | 1489 | #endif /* HAVE_SOCKETS */ |
c0c86835 | 1490 | Vsystem_name = build_string (hostname); |
653d4f43 | 1491 | xfree (hostname_alloc); |
67004ffb | 1492 | #endif /* HAVE_GETHOSTNAME */ |
c0c86835 | 1493 | { |
653d4f43 PE |
1494 | char *p; |
1495 | for (p = SSDATA (Vsystem_name); *p; p++) | |
c0c86835 KH |
1496 | if (*p == ' ' || *p == '\t') |
1497 | *p = '-'; | |
1498 | } | |
67004ffb | 1499 | } |
86a5659e | 1500 | \f |
1fa53021 | 1501 | sigset_t empty_mask; |
86a5659e | 1502 | |
4d7e6e51 PE |
1503 | static struct sigaction process_fatal_action; |
1504 | ||
1505 | static int | |
1506 | emacs_sigaction_flags (void) | |
86a5659e | 1507 | { |
4d7e6e51 | 1508 | #ifdef SA_RESTART |
0caaedb1 PE |
1509 | /* SA_RESTART causes interruptible functions with timeouts (e.g., |
1510 | 'select') to reset their timeout on some platforms (e.g., | |
1511 | HP-UX 11), which is not what we want. Also, when Emacs is | |
1512 | interactive, we don't want SA_RESTART because we need to poll | |
275464e7 | 1513 | for pending input so we need long-running syscalls to be interrupted |
4d7e6e51 PE |
1514 | after a signal that sets pending_signals. |
1515 | ||
1516 | Non-interactive keyboard input goes through stdio, where we | |
1517 | always want restartable system calls. */ | |
ef874e3d | 1518 | if (noninteractive) |
4d7e6e51 | 1519 | return SA_RESTART; |
e065a56e | 1520 | #endif |
4d7e6e51 PE |
1521 | return 0; |
1522 | } | |
1523 | ||
1524 | /* Store into *ACTION a signal action suitable for Emacs, with handler | |
1525 | HANDLER. */ | |
1526 | void | |
1527 | emacs_sigaction_init (struct sigaction *action, signal_handler_t handler) | |
1528 | { | |
1529 | sigemptyset (&action->sa_mask); | |
1530 | ||
1531 | /* When handling a signal, block nonfatal system signals that are caught | |
1532 | by Emacs. This makes race conditions less likely. */ | |
1533 | sigaddset (&action->sa_mask, SIGALRM); | |
bf6b4923 | 1534 | #ifdef SIGCHLD |
4d7e6e51 | 1535 | sigaddset (&action->sa_mask, SIGCHLD); |
bf6b4923 | 1536 | #endif |
4d7e6e51 PE |
1537 | #ifdef SIGDANGER |
1538 | sigaddset (&action->sa_mask, SIGDANGER); | |
1539 | #endif | |
d89460ed PE |
1540 | #ifdef PROFILER_CPU_SUPPORT |
1541 | sigaddset (&action->sa_mask, SIGPROF); | |
1542 | #endif | |
4d7e6e51 PE |
1543 | #ifdef SIGWINCH |
1544 | sigaddset (&action->sa_mask, SIGWINCH); | |
1545 | #endif | |
1546 | if (! noninteractive) | |
1547 | { | |
1548 | sigaddset (&action->sa_mask, SIGINT); | |
1549 | sigaddset (&action->sa_mask, SIGQUIT); | |
1550 | #ifdef USABLE_SIGIO | |
1551 | sigaddset (&action->sa_mask, SIGIO); | |
1552 | #endif | |
1553 | } | |
1554 | ||
4d7e6e51 PE |
1555 | action->sa_handler = handler; |
1556 | action->sa_flags = emacs_sigaction_flags (); | |
86a5659e JB |
1557 | } |
1558 | ||
20ef56db | 1559 | #ifdef FORWARD_SIGNAL_TO_MAIN_THREAD |
0caaedb1 | 1560 | static pthread_t main_thread; |
20ef56db PE |
1561 | #endif |
1562 | ||
4d7e6e51 PE |
1563 | /* SIG has arrived at the current process. Deliver it to the main |
1564 | thread, which should handle it with HANDLER. | |
1565 | ||
1566 | If we are on the main thread, handle the signal SIG with HANDLER. | |
20ef56db PE |
1567 | Otherwise, redirect the signal to the main thread, blocking it from |
1568 | this thread. POSIX says any thread can receive a signal that is | |
1569 | associated with a process, process group, or asynchronous event. | |
1570 | On GNU/Linux that is not true, but for other systems (FreeBSD at | |
1571 | least) it is. */ | |
1572 | void | |
4d7e6e51 | 1573 | deliver_process_signal (int sig, signal_handler_t handler) |
20ef56db PE |
1574 | { |
1575 | /* Preserve errno, to avoid race conditions with signal handlers that | |
1576 | might change errno. Races can occur even in single-threaded hosts. */ | |
1577 | int old_errno = errno; | |
1578 | ||
1579 | bool on_main_thread = true; | |
1580 | #ifdef FORWARD_SIGNAL_TO_MAIN_THREAD | |
1581 | if (! pthread_equal (pthread_self (), main_thread)) | |
1582 | { | |
1583 | sigset_t blocked; | |
1584 | sigemptyset (&blocked); | |
1585 | sigaddset (&blocked, sig); | |
1586 | pthread_sigmask (SIG_BLOCK, &blocked, 0); | |
1587 | pthread_kill (main_thread, sig); | |
1588 | on_main_thread = false; | |
1589 | } | |
1590 | #endif | |
1591 | if (on_main_thread) | |
1592 | handler (sig); | |
1593 | ||
1594 | errno = old_errno; | |
1595 | } | |
4d7e6e51 PE |
1596 | |
1597 | /* Static location to save a fatal backtrace in a thread. | |
1598 | FIXME: If two subsidiary threads fail simultaneously, the resulting | |
1599 | backtrace may be garbage. */ | |
1600 | enum { BACKTRACE_LIMIT_MAX = 500 }; | |
1601 | static void *thread_backtrace_buffer[BACKTRACE_LIMIT_MAX + 1]; | |
1602 | static int thread_backtrace_npointers; | |
1603 | ||
1604 | /* SIG has arrived at the current thread. | |
1605 | If we are on the main thread, handle the signal SIG with HANDLER. | |
1606 | Otherwise, this is a fatal error in the handling thread. */ | |
1607 | static void | |
1608 | deliver_thread_signal (int sig, signal_handler_t handler) | |
1609 | { | |
1610 | int old_errno = errno; | |
1611 | ||
1612 | #ifdef FORWARD_SIGNAL_TO_MAIN_THREAD | |
1613 | if (! pthread_equal (pthread_self (), main_thread)) | |
1614 | { | |
1615 | thread_backtrace_npointers | |
1616 | = backtrace (thread_backtrace_buffer, BACKTRACE_LIMIT_MAX); | |
1617 | sigaction (sig, &process_fatal_action, 0); | |
1618 | pthread_kill (main_thread, sig); | |
1619 | ||
1620 | /* Avoid further damage while the main thread is exiting. */ | |
1621 | while (1) | |
1622 | sigsuspend (&empty_mask); | |
1623 | } | |
1624 | #endif | |
1625 | ||
1626 | handler (sig); | |
1627 | errno = old_errno; | |
1628 | } | |
86a5659e | 1629 | \f |
aa1ba90e PE |
1630 | #if !HAVE_DECL_SYS_SIGLIST |
1631 | # undef sys_siglist | |
c622b48f PE |
1632 | # ifdef _sys_siglist |
1633 | # define sys_siglist _sys_siglist | |
9bd36682 | 1634 | # elif HAVE_DECL___SYS_SIGLIST |
57f8c490 | 1635 | # define sys_siglist __sys_siglist |
c622b48f PE |
1636 | # else |
1637 | # define sys_siglist my_sys_siglist | |
aa1ba90e | 1638 | static char const *sys_siglist[NSIG]; |
c622b48f PE |
1639 | # endif |
1640 | #endif | |
1641 | ||
1642 | #ifdef _sys_nsig | |
1643 | # define sys_siglist_entries _sys_nsig | |
1644 | #else | |
1645 | # define sys_siglist_entries NSIG | |
ca9c0567 PE |
1646 | #endif |
1647 | ||
4d7e6e51 PE |
1648 | /* Handle bus errors, invalid instruction, etc. */ |
1649 | static void | |
1650 | handle_fatal_signal (int sig) | |
1651 | { | |
9d4dcdc9 | 1652 | terminate_due_to_signal (sig, 40); |
4d7e6e51 PE |
1653 | } |
1654 | ||
1655 | static void | |
1656 | deliver_fatal_signal (int sig) | |
1657 | { | |
1658 | deliver_process_signal (sig, handle_fatal_signal); | |
1659 | } | |
1660 | ||
1661 | static void | |
1662 | deliver_fatal_thread_signal (int sig) | |
1663 | { | |
1664 | deliver_thread_signal (sig, handle_fatal_signal); | |
1665 | } | |
1666 | ||
1667 | static _Noreturn void | |
1668 | handle_arith_signal (int sig) | |
1669 | { | |
8cf1e6e6 | 1670 | pthread_sigmask (SIG_SETMASK, &empty_mask, 0); |
4d7e6e51 PE |
1671 | xsignal0 (Qarith_error); |
1672 | } | |
1673 | ||
1674 | static void | |
1675 | deliver_arith_signal (int sig) | |
1676 | { | |
1677 | deliver_thread_signal (sig, handle_arith_signal); | |
1678 | } | |
1679 | ||
b6f960a0 PE |
1680 | #ifdef SIGDANGER |
1681 | ||
1682 | /* Handler for SIGDANGER. */ | |
1683 | static void | |
1684 | handle_danger_signal (int sig) | |
1685 | { | |
1686 | malloc_warning ("Operating system warns that virtual memory is running low.\n"); | |
1687 | ||
1688 | /* It might be unsafe to call do_auto_save now. */ | |
1689 | force_auto_save_soon (); | |
1690 | } | |
1691 | ||
1692 | static void | |
1693 | deliver_danger_signal (int sig) | |
1694 | { | |
1695 | deliver_process_signal (sig, handle_danger_signal); | |
1696 | } | |
1697 | #endif | |
1698 | ||
4d7e6e51 PE |
1699 | /* Treat SIG as a terminating signal, unless it is already ignored and |
1700 | we are in --batch mode. Among other things, this makes nohup work. */ | |
1701 | static void | |
1702 | maybe_fatal_sig (int sig) | |
1703 | { | |
1704 | bool catch_sig = !noninteractive; | |
1705 | if (!catch_sig) | |
1706 | { | |
1707 | struct sigaction old_action; | |
1708 | sigaction (sig, 0, &old_action); | |
1709 | catch_sig = old_action.sa_handler != SIG_IGN; | |
1710 | } | |
1711 | if (catch_sig) | |
1712 | sigaction (sig, &process_fatal_action, 0); | |
1713 | } | |
1714 | ||
ca9c0567 | 1715 | void |
4d7e6e51 | 1716 | init_signals (bool dumping) |
ca9c0567 | 1717 | { |
4d7e6e51 PE |
1718 | struct sigaction thread_fatal_action; |
1719 | struct sigaction action; | |
1720 | ||
ca9c0567 | 1721 | sigemptyset (&empty_mask); |
ca9c0567 | 1722 | |
20ef56db PE |
1723 | #ifdef FORWARD_SIGNAL_TO_MAIN_THREAD |
1724 | main_thread = pthread_self (); | |
1725 | #endif | |
1726 | ||
c622b48f | 1727 | #if !HAVE_DECL_SYS_SIGLIST && !defined _sys_siglist |
ca9c0567 PE |
1728 | if (! initialized) |
1729 | { | |
ca9c0567 | 1730 | sys_siglist[SIGABRT] = "Aborted"; |
ca9c0567 PE |
1731 | # ifdef SIGAIO |
1732 | sys_siglist[SIGAIO] = "LAN I/O interrupt"; | |
1733 | # endif | |
ca9c0567 | 1734 | sys_siglist[SIGALRM] = "Alarm clock"; |
ca9c0567 PE |
1735 | # ifdef SIGBUS |
1736 | sys_siglist[SIGBUS] = "Bus error"; | |
1737 | # endif | |
bf6b4923 | 1738 | # ifdef SIGCHLD |
ca9c0567 | 1739 | sys_siglist[SIGCHLD] = "Child status changed"; |
bf6b4923 | 1740 | # endif |
ca9c0567 PE |
1741 | # ifdef SIGCONT |
1742 | sys_siglist[SIGCONT] = "Continued"; | |
1743 | # endif | |
1744 | # ifdef SIGDANGER | |
1745 | sys_siglist[SIGDANGER] = "Swap space dangerously low"; | |
1746 | # endif | |
1747 | # ifdef SIGDGNOTIFY | |
1748 | sys_siglist[SIGDGNOTIFY] = "Notification message in queue"; | |
1749 | # endif | |
1750 | # ifdef SIGEMT | |
1751 | sys_siglist[SIGEMT] = "Emulation trap"; | |
1752 | # endif | |
ca9c0567 | 1753 | sys_siglist[SIGFPE] = "Arithmetic exception"; |
ca9c0567 PE |
1754 | # ifdef SIGFREEZE |
1755 | sys_siglist[SIGFREEZE] = "SIGFREEZE"; | |
1756 | # endif | |
1757 | # ifdef SIGGRANT | |
1758 | sys_siglist[SIGGRANT] = "Monitor mode granted"; | |
1759 | # endif | |
ca9c0567 | 1760 | sys_siglist[SIGHUP] = "Hangup"; |
ca9c0567 | 1761 | sys_siglist[SIGILL] = "Illegal instruction"; |
ca9c0567 | 1762 | sys_siglist[SIGINT] = "Interrupt"; |
ca9c0567 PE |
1763 | # ifdef SIGIO |
1764 | sys_siglist[SIGIO] = "I/O possible"; | |
1765 | # endif | |
1766 | # ifdef SIGIOINT | |
1767 | sys_siglist[SIGIOINT] = "I/O intervention required"; | |
1768 | # endif | |
1769 | # ifdef SIGIOT | |
1770 | sys_siglist[SIGIOT] = "IOT trap"; | |
1771 | # endif | |
ca9c0567 | 1772 | sys_siglist[SIGKILL] = "Killed"; |
ca9c0567 PE |
1773 | # ifdef SIGLOST |
1774 | sys_siglist[SIGLOST] = "Resource lost"; | |
1775 | # endif | |
1776 | # ifdef SIGLWP | |
1777 | sys_siglist[SIGLWP] = "SIGLWP"; | |
1778 | # endif | |
1779 | # ifdef SIGMSG | |
1780 | sys_siglist[SIGMSG] = "Monitor mode data available"; | |
1781 | # endif | |
1782 | # ifdef SIGPHONE | |
1783 | sys_siglist[SIGWIND] = "SIGPHONE"; | |
1784 | # endif | |
ca9c0567 | 1785 | sys_siglist[SIGPIPE] = "Broken pipe"; |
ca9c0567 PE |
1786 | # ifdef SIGPOLL |
1787 | sys_siglist[SIGPOLL] = "Pollable event occurred"; | |
1788 | # endif | |
1789 | # ifdef SIGPROF | |
1790 | sys_siglist[SIGPROF] = "Profiling timer expired"; | |
1791 | # endif | |
1792 | # ifdef SIGPTY | |
1793 | sys_siglist[SIGPTY] = "PTY I/O interrupt"; | |
1794 | # endif | |
1795 | # ifdef SIGPWR | |
1796 | sys_siglist[SIGPWR] = "Power-fail restart"; | |
1797 | # endif | |
ca9c0567 | 1798 | sys_siglist[SIGQUIT] = "Quit"; |
ca9c0567 | 1799 | # ifdef SIGRETRACT |
40ba43b4 | 1800 | sys_siglist[SIGRETRACT] = "Need to relinquish monitor mode"; |
ca9c0567 PE |
1801 | # endif |
1802 | # ifdef SIGSAK | |
1803 | sys_siglist[SIGSAK] = "Secure attention"; | |
1804 | # endif | |
ca9c0567 | 1805 | sys_siglist[SIGSEGV] = "Segmentation violation"; |
ca9c0567 PE |
1806 | # ifdef SIGSOUND |
1807 | sys_siglist[SIGSOUND] = "Sound completed"; | |
1808 | # endif | |
1809 | # ifdef SIGSTOP | |
1810 | sys_siglist[SIGSTOP] = "Stopped (signal)"; | |
1811 | # endif | |
1812 | # ifdef SIGSTP | |
1813 | sys_siglist[SIGSTP] = "Stopped (user)"; | |
1814 | # endif | |
1815 | # ifdef SIGSYS | |
1816 | sys_siglist[SIGSYS] = "Bad argument to system call"; | |
1817 | # endif | |
ca9c0567 | 1818 | sys_siglist[SIGTERM] = "Terminated"; |
ca9c0567 PE |
1819 | # ifdef SIGTHAW |
1820 | sys_siglist[SIGTHAW] = "SIGTHAW"; | |
1821 | # endif | |
1822 | # ifdef SIGTRAP | |
1823 | sys_siglist[SIGTRAP] = "Trace/breakpoint trap"; | |
1824 | # endif | |
1825 | # ifdef SIGTSTP | |
1826 | sys_siglist[SIGTSTP] = "Stopped (user)"; | |
1827 | # endif | |
1828 | # ifdef SIGTTIN | |
1829 | sys_siglist[SIGTTIN] = "Stopped (tty input)"; | |
1830 | # endif | |
1831 | # ifdef SIGTTOU | |
1832 | sys_siglist[SIGTTOU] = "Stopped (tty output)"; | |
1833 | # endif | |
1834 | # ifdef SIGURG | |
1835 | sys_siglist[SIGURG] = "Urgent I/O condition"; | |
1836 | # endif | |
1837 | # ifdef SIGUSR1 | |
1838 | sys_siglist[SIGUSR1] = "User defined signal 1"; | |
1839 | # endif | |
1840 | # ifdef SIGUSR2 | |
1841 | sys_siglist[SIGUSR2] = "User defined signal 2"; | |
1842 | # endif | |
1843 | # ifdef SIGVTALRM | |
1844 | sys_siglist[SIGVTALRM] = "Virtual timer expired"; | |
1845 | # endif | |
1846 | # ifdef SIGWAITING | |
1847 | sys_siglist[SIGWAITING] = "Process's LWPs are blocked"; | |
1848 | # endif | |
1849 | # ifdef SIGWINCH | |
1850 | sys_siglist[SIGWINCH] = "Window size changed"; | |
1851 | # endif | |
1852 | # ifdef SIGWIND | |
1853 | sys_siglist[SIGWIND] = "SIGWIND"; | |
1854 | # endif | |
1855 | # ifdef SIGXCPU | |
1856 | sys_siglist[SIGXCPU] = "CPU time limit exceeded"; | |
1857 | # endif | |
1858 | # ifdef SIGXFSZ | |
1859 | sys_siglist[SIGXFSZ] = "File size limit exceeded"; | |
1860 | # endif | |
1861 | } | |
c622b48f | 1862 | #endif /* !HAVE_DECL_SYS_SIGLIST && !_sys_siglist */ |
4d7e6e51 PE |
1863 | |
1864 | /* Don't alter signal handlers if dumping. On some machines, | |
1865 | changing signal handlers sets static data that would make signals | |
1866 | fail to work right when the dumped Emacs is run. */ | |
1867 | if (dumping) | |
1868 | return; | |
1869 | ||
1870 | sigfillset (&process_fatal_action.sa_mask); | |
1871 | process_fatal_action.sa_handler = deliver_fatal_signal; | |
62a1d661 | 1872 | process_fatal_action.sa_flags = emacs_sigaction_flags (); |
4d7e6e51 PE |
1873 | |
1874 | sigfillset (&thread_fatal_action.sa_mask); | |
1875 | thread_fatal_action.sa_handler = deliver_fatal_thread_signal; | |
1876 | thread_fatal_action.sa_flags = process_fatal_action.sa_flags; | |
1877 | ||
1878 | /* SIGINT may need special treatment on MS-Windows. See | |
1879 | http://lists.gnu.org/archive/html/emacs-devel/2010-09/msg01062.html | |
1880 | Please update the doc of kill-emacs, kill-emacs-hook, and | |
1881 | NEWS if you change this. */ | |
1882 | ||
1883 | maybe_fatal_sig (SIGHUP); | |
1884 | maybe_fatal_sig (SIGINT); | |
1885 | maybe_fatal_sig (SIGTERM); | |
1886 | ||
1887 | /* Emacs checks for write errors, so it can safely ignore SIGPIPE. | |
1888 | However, in batch mode leave SIGPIPE alone, as that causes Emacs | |
1889 | to behave more like typical batch applications do. */ | |
1890 | if (! noninteractive) | |
1891 | signal (SIGPIPE, SIG_IGN); | |
1892 | ||
1893 | sigaction (SIGQUIT, &process_fatal_action, 0); | |
1894 | sigaction (SIGILL, &thread_fatal_action, 0); | |
1895 | sigaction (SIGTRAP, &thread_fatal_action, 0); | |
1896 | ||
1897 | /* Typically SIGFPE is thread-specific and is fatal, like SIGILL. | |
1898 | But on a non-IEEE host SIGFPE can come from a trap in the Lisp | |
1899 | interpreter's floating point operations, so treat SIGFPE as an | |
1900 | arith-error if it arises in the main thread. */ | |
1901 | if (IEEE_FLOATING_POINT) | |
1902 | sigaction (SIGFPE, &thread_fatal_action, 0); | |
1903 | else | |
1904 | { | |
1905 | emacs_sigaction_init (&action, deliver_arith_signal); | |
1906 | sigaction (SIGFPE, &action, 0); | |
1907 | } | |
1908 | ||
1909 | #ifdef SIGUSR1 | |
1910 | add_user_signal (SIGUSR1, "sigusr1"); | |
1911 | #endif | |
1912 | #ifdef SIGUSR2 | |
1913 | add_user_signal (SIGUSR2, "sigusr2"); | |
1914 | #endif | |
1915 | sigaction (SIGABRT, &thread_fatal_action, 0); | |
1916 | #ifdef SIGPRE | |
1917 | sigaction (SIGPRE, &thread_fatal_action, 0); | |
1918 | #endif | |
1919 | #ifdef SIGORE | |
1920 | sigaction (SIGORE, &thread_fatal_action, 0); | |
1921 | #endif | |
1922 | #ifdef SIGUME | |
1923 | sigaction (SIGUME, &thread_fatal_action, 0); | |
1924 | #endif | |
1925 | #ifdef SIGDLK | |
1926 | sigaction (SIGDLK, &process_fatal_action, 0); | |
1927 | #endif | |
1928 | #ifdef SIGCPULIM | |
1929 | sigaction (SIGCPULIM, &process_fatal_action, 0); | |
1930 | #endif | |
1931 | #ifdef SIGIOT | |
1932 | sigaction (SIGIOT, &thread_fatal_action, 0); | |
1933 | #endif | |
1934 | #ifdef SIGEMT | |
1935 | sigaction (SIGEMT, &thread_fatal_action, 0); | |
1936 | #endif | |
1937 | #ifdef SIGBUS | |
1938 | sigaction (SIGBUS, &thread_fatal_action, 0); | |
1939 | #endif | |
1940 | sigaction (SIGSEGV, &thread_fatal_action, 0); | |
1941 | #ifdef SIGSYS | |
1942 | sigaction (SIGSYS, &thread_fatal_action, 0); | |
1943 | #endif | |
1944 | sigaction (SIGTERM, &process_fatal_action, 0); | |
1945 | #ifdef SIGPROF | |
d89460ed | 1946 | signal (SIGPROF, SIG_IGN); |
4d7e6e51 PE |
1947 | #endif |
1948 | #ifdef SIGVTALRM | |
1949 | sigaction (SIGVTALRM, &process_fatal_action, 0); | |
1950 | #endif | |
1951 | #ifdef SIGXCPU | |
1952 | sigaction (SIGXCPU, &process_fatal_action, 0); | |
1953 | #endif | |
1954 | #ifdef SIGXFSZ | |
1955 | sigaction (SIGXFSZ, &process_fatal_action, 0); | |
1956 | #endif | |
1957 | ||
1958 | #ifdef SIGDANGER | |
1959 | /* This just means available memory is getting low. */ | |
1960 | emacs_sigaction_init (&action, deliver_danger_signal); | |
1961 | sigaction (SIGDANGER, &action, 0); | |
1962 | #endif | |
1963 | ||
1964 | /* AIX-specific signals. */ | |
1965 | #ifdef SIGGRANT | |
1966 | sigaction (SIGGRANT, &process_fatal_action, 0); | |
1967 | #endif | |
1968 | #ifdef SIGMIGRATE | |
1969 | sigaction (SIGMIGRATE, &process_fatal_action, 0); | |
1970 | #endif | |
1971 | #ifdef SIGMSG | |
1972 | sigaction (SIGMSG, &process_fatal_action, 0); | |
1973 | #endif | |
1974 | #ifdef SIGRETRACT | |
1975 | sigaction (SIGRETRACT, &process_fatal_action, 0); | |
1976 | #endif | |
1977 | #ifdef SIGSAK | |
1978 | sigaction (SIGSAK, &process_fatal_action, 0); | |
1979 | #endif | |
1980 | #ifdef SIGSOUND | |
1981 | sigaction (SIGSOUND, &process_fatal_action, 0); | |
1982 | #endif | |
1983 | #ifdef SIGTALRM | |
1984 | sigaction (SIGTALRM, &thread_fatal_action, 0); | |
1985 | #endif | |
ca9c0567 PE |
1986 | } |
1987 | \f | |
9927a7b1 | 1988 | #ifndef HAVE_RANDOM |
4bb8c8b7 KH |
1989 | #ifdef random |
1990 | #define HAVE_RANDOM | |
1991 | #endif | |
1992 | #endif | |
1993 | ||
1994 | /* Figure out how many bits the system's random number generator uses. | |
1995 | `random' and `lrand48' are assumed to return 31 usable bits. | |
1996 | BSD `rand' returns a 31 bit value but the low order bits are unusable; | |
1997 | so we'll shift it and treat it like the 15-bit USG `rand'. */ | |
1998 | ||
1999 | #ifndef RAND_BITS | |
2000 | # ifdef HAVE_RANDOM | |
2001 | # define RAND_BITS 31 | |
2002 | # else /* !HAVE_RANDOM */ | |
2003 | # ifdef HAVE_LRAND48 | |
2004 | # define RAND_BITS 31 | |
2005 | # define random lrand48 | |
2006 | # else /* !HAVE_LRAND48 */ | |
2007 | # define RAND_BITS 15 | |
2008 | # if RAND_MAX == 32767 | |
2009 | # define random rand | |
2010 | # else /* RAND_MAX != 32767 */ | |
2011 | # if RAND_MAX == 2147483647 | |
2012 | # define random() (rand () >> 16) | |
2013 | # else /* RAND_MAX != 2147483647 */ | |
2014 | # ifdef USG | |
2015 | # define random rand | |
2016 | # else | |
2017 | # define random() (rand () >> 16) | |
2a633456 | 2018 | # endif /* !USG */ |
4bb8c8b7 KH |
2019 | # endif /* RAND_MAX != 2147483647 */ |
2020 | # endif /* RAND_MAX != 32767 */ | |
2021 | # endif /* !HAVE_LRAND48 */ | |
2022 | # endif /* !HAVE_RANDOM */ | |
2023 | #endif /* !RAND_BITS */ | |
2e46c7c6 | 2024 | |
4bb8c8b7 | 2025 | void |
0e23ef9d | 2026 | seed_random (void *seed, ptrdiff_t seed_size) |
86a5659e | 2027 | { |
33634217 | 2028 | #if defined HAVE_RANDOM || ! defined HAVE_LRAND48 |
0e23ef9d PE |
2029 | unsigned int arg = 0; |
2030 | #else | |
2031 | long int arg = 0; | |
2032 | #endif | |
2033 | unsigned char *argp = (unsigned char *) &arg; | |
2034 | unsigned char *seedp = seed; | |
2035 | ptrdiff_t i; | |
2036 | for (i = 0; i < seed_size; i++) | |
2037 | argp[i % sizeof arg] ^= seedp[i]; | |
4bb8c8b7 | 2038 | #ifdef HAVE_RANDOM |
0e23ef9d | 2039 | srandom (arg); |
f8b53a82 | 2040 | #else |
4bb8c8b7 | 2041 | # ifdef HAVE_LRAND48 |
76425a49 | 2042 | srand48 (arg); |
4bb8c8b7 | 2043 | # else |
0e23ef9d | 2044 | srand (arg); |
4bb8c8b7 | 2045 | # endif |
2e46c7c6 | 2046 | #endif |
86a5659e JB |
2047 | } |
2048 | ||
0e23ef9d PE |
2049 | void |
2050 | init_random (void) | |
2051 | { | |
43aac990 PE |
2052 | struct timespec t = current_timespec (); |
2053 | uintmax_t v = getpid () ^ t.tv_sec ^ t.tv_nsec; | |
0e23ef9d PE |
2054 | seed_random (&v, sizeof v); |
2055 | } | |
2056 | ||
4bb8c8b7 | 2057 | /* |
d8ed26bd PE |
2058 | * Return a nonnegative random integer out of whatever we've got. |
2059 | * It contains enough bits to make a random (signed) Emacs fixnum. | |
4bb8c8b7 KH |
2060 | * This suffices even for a 64-bit architecture with a 15-bit rand. |
2061 | */ | |
ede49d71 | 2062 | EMACS_INT |
971de7fb | 2063 | get_random (void) |
4bb8c8b7 | 2064 | { |
ede49d71 PE |
2065 | EMACS_UINT val = 0; |
2066 | int i; | |
d8ed26bd PE |
2067 | for (i = 0; i < (FIXNUM_BITS + RAND_BITS - 1) / RAND_BITS; i++) |
2068 | val = (random () ^ (val << RAND_BITS) | |
2069 | ^ (val >> (BITS_PER_EMACS_INT - RAND_BITS))); | |
2070 | val ^= val >> (BITS_PER_EMACS_INT - FIXNUM_BITS); | |
2071 | return val & INTMASK; | |
4bb8c8b7 | 2072 | } |
7088d1ca | 2073 | |
55e5faa1 PE |
2074 | #ifndef HAVE_SNPRINTF |
2075 | /* Approximate snprintf as best we can on ancient hosts that lack it. */ | |
2076 | int | |
2077 | snprintf (char *buf, size_t bufsize, char const *format, ...) | |
2078 | { | |
2079 | ptrdiff_t size = min (bufsize, PTRDIFF_MAX); | |
2080 | ptrdiff_t nbytes = size - 1; | |
2081 | va_list ap; | |
2082 | ||
2083 | if (size) | |
2084 | { | |
2085 | va_start (ap, format); | |
2086 | nbytes = doprnt (buf, size, format, 0, ap); | |
2087 | va_end (ap); | |
2088 | } | |
2089 | ||
2090 | if (nbytes == size - 1) | |
2091 | { | |
2092 | /* Calculate the length of the string that would have been created | |
2093 | had the buffer been large enough. */ | |
2094 | char stackbuf[4000]; | |
2095 | char *b = stackbuf; | |
2096 | ptrdiff_t bsize = sizeof stackbuf; | |
2097 | va_start (ap, format); | |
2098 | nbytes = evxprintf (&b, &bsize, stackbuf, -1, format, ap); | |
2099 | va_end (ap); | |
2100 | if (b != stackbuf) | |
2101 | xfree (b); | |
2102 | } | |
2103 | ||
2104 | if (INT_MAX < nbytes) | |
2105 | { | |
31bed486 | 2106 | #ifdef EOVERFLOW |
55e5faa1 | 2107 | errno = EOVERFLOW; |
31bed486 EZ |
2108 | #else |
2109 | errno = EDOM; | |
2110 | #endif | |
55e5faa1 PE |
2111 | return -1; |
2112 | } | |
2113 | return nbytes; | |
2114 | } | |
2115 | #endif | |
86a5659e | 2116 | \f |
cf29dd84 PE |
2117 | /* If a backtrace is available, output the top lines of it to stderr. |
2118 | Do not output more than BACKTRACE_LIMIT or BACKTRACE_LIMIT_MAX lines. | |
2119 | This function may be called from a signal handler, so it should | |
2120 | not invoke async-unsafe functions like malloc. */ | |
2121 | void | |
2122 | emacs_backtrace (int backtrace_limit) | |
2123 | { | |
4d7e6e51 | 2124 | void *main_backtrace_buffer[BACKTRACE_LIMIT_MAX + 1]; |
cf29dd84 | 2125 | int bounded_limit = min (backtrace_limit, BACKTRACE_LIMIT_MAX); |
4d7e6e51 PE |
2126 | void *buffer; |
2127 | int npointers; | |
2128 | ||
2129 | if (thread_backtrace_npointers) | |
2130 | { | |
2131 | buffer = thread_backtrace_buffer; | |
2132 | npointers = thread_backtrace_npointers; | |
2133 | } | |
2134 | else | |
2135 | { | |
2136 | buffer = main_backtrace_buffer; | |
2137 | npointers = backtrace (buffer, bounded_limit + 1); | |
2138 | } | |
2139 | ||
cf29dd84 | 2140 | if (npointers) |
4d7e6e51 | 2141 | { |
4ebbdd67 | 2142 | emacs_write (STDERR_FILENO, "\nBacktrace:\n", 12); |
4d7e6e51 PE |
2143 | backtrace_symbols_fd (buffer, npointers, STDERR_FILENO); |
2144 | if (bounded_limit < npointers) | |
4ebbdd67 | 2145 | emacs_write (STDERR_FILENO, "...\n", 4); |
4d7e6e51 | 2146 | } |
cf29dd84 PE |
2147 | } |
2148 | \f | |
1088b922 | 2149 | #ifndef HAVE_NTGUI |
1088b922 PE |
2150 | void |
2151 | emacs_abort (void) | |
2152 | { | |
17fdfc15 | 2153 | terminate_due_to_signal (SIGABRT, 40); |
1088b922 PE |
2154 | } |
2155 | #endif | |
2156 | ||
406af475 | 2157 | /* Open FILE for Emacs use, using open flags OFLAG and mode MODE. |
067428c1 PE |
2158 | Arrange for subprograms to not inherit the file descriptor. |
2159 | Prefer a method that is multithread-safe, if available. | |
406af475 PE |
2160 | Do not fail merely because the open was interrupted by a signal. |
2161 | Allow the user to quit. */ | |
2162 | ||
86a5659e | 2163 | int |
406af475 | 2164 | emacs_open (const char *file, int oflags, int mode) |
86a5659e | 2165 | { |
406af475 | 2166 | int fd; |
067428c1 | 2167 | oflags |= O_CLOEXEC; |
406af475 PE |
2168 | while ((fd = open (file, oflags, mode)) < 0 && errno == EINTR) |
2169 | QUIT; | |
067428c1 PE |
2170 | if (! O_CLOEXEC && 0 <= fd) |
2171 | fcntl (fd, F_SETFD, FD_CLOEXEC); | |
406af475 PE |
2172 | return fd; |
2173 | } | |
68c45bf0 | 2174 | |
406af475 PE |
2175 | /* Open FILE as a stream for Emacs use, with mode MODE. |
2176 | Act like emacs_open with respect to threads, signals, and quits. */ | |
2177 | ||
2178 | FILE * | |
2179 | emacs_fopen (char const *file, char const *mode) | |
2180 | { | |
067428c1 PE |
2181 | int fd, omode, oflags; |
2182 | int bflag = 0; | |
2183 | char const *m = mode; | |
2184 | ||
2185 | switch (*m++) | |
2186 | { | |
2187 | case 'r': omode = O_RDONLY; oflags = 0; break; | |
2188 | case 'w': omode = O_WRONLY; oflags = O_CREAT | O_TRUNC; break; | |
2189 | case 'a': omode = O_WRONLY; oflags = O_CREAT | O_APPEND; break; | |
2190 | default: emacs_abort (); | |
2191 | } | |
2192 | ||
2193 | while (*m) | |
2194 | switch (*m++) | |
2195 | { | |
2196 | case '+': omode = O_RDWR; break; | |
2197 | case 'b': bflag = O_BINARY; break; | |
2198 | case 't': bflag = O_TEXT; break; | |
2199 | default: /* Ignore. */ break; | |
2200 | } | |
2201 | ||
2202 | fd = emacs_open (file, omode | oflags | bflag, 0666); | |
2203 | return fd < 0 ? 0 : fdopen (fd, mode); | |
86a5659e JB |
2204 | } |
2205 | ||
c7ddc792 PE |
2206 | /* Create a pipe for Emacs use. */ |
2207 | ||
2208 | int | |
2209 | emacs_pipe (int fd[2]) | |
2210 | { | |
bf6b4923 EZ |
2211 | #ifdef MSDOS |
2212 | return pipe (fd); | |
2213 | #else /* !MSDOS */ | |
c7ddc792 PE |
2214 | int result = pipe2 (fd, O_CLOEXEC); |
2215 | if (! O_CLOEXEC && result == 0) | |
2216 | { | |
2217 | fcntl (fd[0], F_SETFD, FD_CLOEXEC); | |
2218 | fcntl (fd[1], F_SETFD, FD_CLOEXEC); | |
2219 | } | |
2220 | return result; | |
bf6b4923 | 2221 | #endif /* !MSDOS */ |
c7ddc792 PE |
2222 | } |
2223 | ||
bacba3c2 PE |
2224 | /* Approximate posix_close and POSIX_CLOSE_RESTART well enough for Emacs. |
2225 | For the background behind this mess, please see Austin Group defect 529 | |
2226 | <http://austingroupbugs.net/view.php?id=529>. */ | |
2227 | ||
2228 | #ifndef POSIX_CLOSE_RESTART | |
2229 | # define POSIX_CLOSE_RESTART 1 | |
2230 | static int | |
2231 | posix_close (int fd, int flag) | |
86a5659e | 2232 | { |
bacba3c2 PE |
2233 | /* Only the POSIX_CLOSE_RESTART case is emulated. */ |
2234 | eassert (flag == POSIX_CLOSE_RESTART); | |
2235 | ||
2236 | /* Things are tricky if close (fd) returns -1 with errno == EINTR | |
2237 | on a system that does not define POSIX_CLOSE_RESTART. | |
2238 | ||
2239 | In this case, in some systems (e.g., GNU/Linux, AIX) FD is | |
2240 | closed, and retrying the close could inadvertently close a file | |
2241 | descriptor allocated by some other thread. In other systems | |
2242 | (e.g., HP/UX) FD is not closed. And in still other systems | |
2243 | (e.g., OS X, Solaris), maybe FD is closed, maybe not, and in a | |
2244 | multithreaded program there can be no way to tell. | |
2245 | ||
2246 | So, in this case, pretend that the close succeeded. This works | |
2247 | well on systems like GNU/Linux that close FD. Although it may | |
2248 | leak a file descriptor on other systems, the leak is unlikely and | |
2249 | it's better to leak than to close a random victim. */ | |
2250 | return close (fd) == 0 || errno == EINTR ? 0 : -1; | |
2251 | } | |
2252 | #endif | |
86a5659e | 2253 | |
bacba3c2 PE |
2254 | /* Close FD, retrying if interrupted. If successful, return 0; |
2255 | otherwise, return -1 and set errno to a non-EINTR value. Consider | |
2256 | an EINPROGRESS error to be successful, as that's merely a signal | |
2257 | arriving. FD is always closed when this function returns, even | |
2258 | when it returns -1. | |
fe111daf | 2259 | |
7e649856 PE |
2260 | Do not call this function if FD is nonnegative and might already be closed, |
2261 | as that might close an innocent victim opened by some other thread. */ | |
fe111daf | 2262 | |
bacba3c2 PE |
2263 | int |
2264 | emacs_close (int fd) | |
2265 | { | |
2266 | while (1) | |
2267 | { | |
2268 | int r = posix_close (fd, POSIX_CLOSE_RESTART); | |
2269 | if (r == 0) | |
2270 | return r; | |
2271 | if (!POSIX_CLOSE_RESTART || errno != EINTR) | |
2272 | { | |
7e649856 | 2273 | eassert (errno != EBADF || fd < 0); |
bacba3c2 PE |
2274 | return errno == EINPROGRESS ? 0 : r; |
2275 | } | |
2276 | } | |
86a5659e JB |
2277 | } |
2278 | ||
1963a2e0 PE |
2279 | /* Maximum number of bytes to read or write in a single system call. |
2280 | This works around a serious bug in Linux kernels before 2.6.16; see | |
2281 | <https://bugzilla.redhat.com/show_bug.cgi?format=multiple&id=612839>. | |
2282 | It's likely to work around similar bugs in other operating systems, so do it | |
2283 | on all platforms. Round INT_MAX down to a page size, with the conservative | |
2284 | assumption that page sizes are at most 2**18 bytes (any kernel with a | |
2285 | page size larger than that shouldn't have the bug). */ | |
2286 | #ifndef MAX_RW_COUNT | |
2287 | #define MAX_RW_COUNT (INT_MAX >> 18 << 18) | |
2288 | #endif | |
2289 | ||
273a5f82 PE |
2290 | /* Read from FILEDESC to a buffer BUF with size NBYTE, retrying if interrupted. |
2291 | Return the number of bytes read, which might be less than NBYTE. | |
2292 | On error, set errno and return -1. */ | |
d311d28c | 2293 | ptrdiff_t |
223752d7 | 2294 | emacs_read (int fildes, void *buf, ptrdiff_t nbyte) |
86a5659e | 2295 | { |
223752d7 | 2296 | ssize_t rtnval; |
177c0ea7 | 2297 | |
71b41406 PE |
2298 | /* There is no need to check against MAX_RW_COUNT, since no caller ever |
2299 | passes a size that large to emacs_read. */ | |
2300 | ||
2301 | while ((rtnval = read (fildes, buf, nbyte)) == -1 | |
275464e7 SM |
2302 | && (errno == EINTR)) |
2303 | QUIT; | |
86a5659e JB |
2304 | return (rtnval); |
2305 | } | |
2306 | ||
273a5f82 | 2307 | /* Write to FILEDES from a buffer BUF with size NBYTE, retrying if interrupted |
4ebbdd67 PE |
2308 | or if a partial write occurs. If interrupted, process pending |
2309 | signals if PROCESS SIGNALS. Return the number of bytes written, setting | |
273a5f82 | 2310 | errno if this is less than NBYTE. */ |
4ebbdd67 PE |
2311 | static ptrdiff_t |
2312 | emacs_full_write (int fildes, char const *buf, ptrdiff_t nbyte, | |
2313 | bool process_signals) | |
86a5659e | 2314 | { |
4ebbdd67 | 2315 | ptrdiff_t bytes_written = 0; |
b95520f5 | 2316 | |
273a5f82 | 2317 | while (nbyte > 0) |
b95520f5 | 2318 | { |
4ebbdd67 | 2319 | ssize_t n = write (fildes, buf, min (nbyte, MAX_RW_COUNT)); |
b95520f5 | 2320 | |
4ebbdd67 | 2321 | if (n < 0) |
b95520f5 BF |
2322 | { |
2323 | if (errno == EINTR) | |
77220eeb | 2324 | { |
77220eeb SM |
2325 | /* I originally used `QUIT' but that might causes files to |
2326 | be truncated if you hit C-g in the middle of it. --Stef */ | |
4ebbdd67 | 2327 | if (process_signals && pending_signals) |
4d7e6e51 | 2328 | process_pending_signals (); |
77220eeb SM |
2329 | continue; |
2330 | } | |
b95520f5 | 2331 | else |
273a5f82 | 2332 | break; |
b95520f5 BF |
2333 | } |
2334 | ||
4ebbdd67 PE |
2335 | buf += n; |
2336 | nbyte -= n; | |
2337 | bytes_written += n; | |
b95520f5 | 2338 | } |
273a5f82 | 2339 | |
4ebbdd67 PE |
2340 | return bytes_written; |
2341 | } | |
2342 | ||
2343 | /* Write to FILEDES from a buffer BUF with size NBYTE, retrying if | |
2344 | interrupted or if a partial write occurs. Return the number of | |
2345 | bytes written, setting errno if this is less than NBYTE. */ | |
2346 | ptrdiff_t | |
223752d7 | 2347 | emacs_write (int fildes, void const *buf, ptrdiff_t nbyte) |
4ebbdd67 PE |
2348 | { |
2349 | return emacs_full_write (fildes, buf, nbyte, 0); | |
2350 | } | |
2351 | ||
2352 | /* Like emacs_write, but also process pending signals if interrupted. */ | |
2353 | ptrdiff_t | |
223752d7 | 2354 | emacs_write_sig (int fildes, void const *buf, ptrdiff_t nbyte) |
4ebbdd67 PE |
2355 | { |
2356 | return emacs_full_write (fildes, buf, nbyte, 1); | |
2357 | } | |
2358 | ||
2359 | /* Write a diagnostic to standard error that contains MESSAGE and a | |
2360 | string derived from errno. Preserve errno. Do not buffer stderr. | |
2361 | Do not process pending signals if interrupted. */ | |
2362 | void | |
2363 | emacs_perror (char const *message) | |
2364 | { | |
2365 | int err = errno; | |
2366 | char const *error_string = strerror (err); | |
2367 | char const *command = (initial_argv && initial_argv[0] | |
2368 | ? initial_argv[0] : "emacs"); | |
2369 | /* Write it out all at once, if it's short; this is less likely to | |
2370 | be interleaved with other output. */ | |
2371 | char buf[BUFSIZ]; | |
2372 | int nbytes = snprintf (buf, sizeof buf, "%s: %s: %s\n", | |
2373 | command, message, error_string); | |
2374 | if (0 <= nbytes && nbytes < BUFSIZ) | |
2375 | emacs_write (STDERR_FILENO, buf, nbytes); | |
2376 | else | |
2377 | { | |
2378 | emacs_write (STDERR_FILENO, command, strlen (command)); | |
2379 | emacs_write (STDERR_FILENO, ": ", 2); | |
2380 | emacs_write (STDERR_FILENO, message, strlen (message)); | |
2381 | emacs_write (STDERR_FILENO, ": ", 2); | |
2382 | emacs_write (STDERR_FILENO, error_string, strlen (error_string)); | |
2383 | emacs_write (STDERR_FILENO, "\n", 1); | |
2384 | } | |
2385 | errno = err; | |
86a5659e | 2386 | } |
86a5659e | 2387 | \f |
d35af63c PE |
2388 | /* Return a struct timeval that is roughly equivalent to T. |
2389 | Use the least timeval not less than T. | |
2390 | Return an extremal value if the result would overflow. */ | |
2391 | struct timeval | |
43aac990 | 2392 | make_timeval (struct timespec t) |
d35af63c PE |
2393 | { |
2394 | struct timeval tv; | |
2395 | tv.tv_sec = t.tv_sec; | |
2396 | tv.tv_usec = t.tv_nsec / 1000; | |
2397 | ||
2398 | if (t.tv_nsec % 1000 != 0) | |
2399 | { | |
2400 | if (tv.tv_usec < 999999) | |
2401 | tv.tv_usec++; | |
2402 | else if (tv.tv_sec < TYPE_MAXIMUM (time_t)) | |
2403 | { | |
2404 | tv.tv_sec++; | |
2405 | tv.tv_usec = 0; | |
2406 | } | |
2407 | } | |
2408 | ||
2409 | return tv; | |
2410 | } | |
2411 | ||
2412 | /* Set the access and modification time stamps of FD (a.k.a. FILE) to be | |
2413 | ATIME and MTIME, respectively. | |
2414 | FD must be either negative -- in which case it is ignored -- | |
2415 | or a file descriptor that is open on FILE. | |
2416 | If FD is nonnegative, then FILE can be NULL. */ | |
53ea491a | 2417 | int |
d35af63c | 2418 | set_file_times (int fd, const char *filename, |
43aac990 | 2419 | struct timespec atime, struct timespec mtime) |
d35af63c PE |
2420 | { |
2421 | struct timespec timespec[2]; | |
2422 | timespec[0] = atime; | |
2423 | timespec[1] = mtime; | |
2424 | return fdutimens (fd, filename, timespec); | |
53ea491a KH |
2425 | } |
2426 | \f | |
aa1ba90e PE |
2427 | /* Like strsignal, except async-signal-safe, and this function typically |
2428 | returns a string in the C locale rather than the current locale. */ | |
2429 | char const * | |
2430 | safe_strsignal (int code) | |
68c45bf0 | 2431 | { |
aa1ba90e | 2432 | char const *signame = 0; |
68c45bf0 | 2433 | |
c622b48f | 2434 | if (0 <= code && code < sys_siglist_entries) |
aa1ba90e PE |
2435 | signame = sys_siglist[code]; |
2436 | if (! signame) | |
2437 | signame = "Unknown signal"; | |
c4ea52a6 | 2438 | |
68c45bf0 PE |
2439 | return signame; |
2440 | } | |
d888760c | 2441 | \f |
a7ebc409 | 2442 | #ifndef DOS_NT |
d888760c | 2443 | /* For make-serial-process */ |
cf84bb53 | 2444 | int |
4e604a5d | 2445 | serial_open (Lisp_Object port) |
d888760c | 2446 | { |
4e604a5d | 2447 | int fd = emacs_open (SSDATA (port), O_RDWR | O_NOCTTY | O_NONBLOCK, 0); |
d888760c | 2448 | if (fd < 0) |
4e604a5d | 2449 | report_file_error ("Opening serial port", port); |
d888760c GM |
2450 | #ifdef TIOCEXCL |
2451 | ioctl (fd, TIOCEXCL, (char *) 0); | |
2452 | #endif | |
2453 | ||
2454 | return fd; | |
2455 | } | |
759d3f32 SM |
2456 | |
2457 | #if !defined (HAVE_CFMAKERAW) | |
2458 | /* Workaround for targets which are missing cfmakeraw. */ | |
2459 | /* Pasted from man page. */ | |
cf84bb53 JB |
2460 | static void |
2461 | cfmakeraw (struct termios *termios_p) | |
759d3f32 SM |
2462 | { |
2463 | termios_p->c_iflag &= ~(IGNBRK|BRKINT|PARMRK|ISTRIP|INLCR|IGNCR|ICRNL|IXON); | |
2464 | termios_p->c_oflag &= ~OPOST; | |
2465 | termios_p->c_lflag &= ~(ECHO|ECHONL|ICANON|ISIG|IEXTEN); | |
2466 | termios_p->c_cflag &= ~(CSIZE|PARENB); | |
2467 | termios_p->c_cflag |= CS8; | |
2468 | } | |
2469 | #endif /* !defined (HAVE_CFMAKERAW */ | |
2470 | ||
2471 | #if !defined (HAVE_CFSETSPEED) | |
2472 | /* Workaround for targets which are missing cfsetspeed. */ | |
cf84bb53 JB |
2473 | static int |
2474 | cfsetspeed (struct termios *termios_p, speed_t vitesse) | |
759d3f32 SM |
2475 | { |
2476 | return (cfsetispeed (termios_p, vitesse) | |
2477 | + cfsetospeed (termios_p, vitesse)); | |
2478 | } | |
2479 | #endif | |
2480 | ||
d888760c GM |
2481 | /* For serial-process-configure */ |
2482 | void | |
2483 | serial_configure (struct Lisp_Process *p, | |
cf84bb53 | 2484 | Lisp_Object contact) |
d888760c GM |
2485 | { |
2486 | Lisp_Object childp2 = Qnil; | |
2487 | Lisp_Object tem = Qnil; | |
2488 | struct termios attr; | |
9c05bccf | 2489 | int err; |
d888760c GM |
2490 | char summary[4] = "???"; /* This usually becomes "8N1". */ |
2491 | ||
4d2b044c | 2492 | childp2 = Fcopy_sequence (p->childp); |
d888760c GM |
2493 | |
2494 | /* Read port attributes and prepare default configuration. */ | |
2495 | err = tcgetattr (p->outfd, &attr); | |
2496 | if (err != 0) | |
4e604a5d | 2497 | report_file_error ("Failed tcgetattr", Qnil); |
d888760c GM |
2498 | cfmakeraw (&attr); |
2499 | #if defined (CLOCAL) | |
2500 | attr.c_cflag |= CLOCAL; | |
2501 | #endif | |
2502 | #if defined (CREAD) | |
6d1921be | 2503 | attr.c_cflag |= CREAD; |
d888760c GM |
2504 | #endif |
2505 | ||
2506 | /* Configure speed. */ | |
2507 | if (!NILP (Fplist_member (contact, QCspeed))) | |
2508 | tem = Fplist_get (contact, QCspeed); | |
2509 | else | |
4d2b044c | 2510 | tem = Fplist_get (p->childp, QCspeed); |
d888760c GM |
2511 | CHECK_NUMBER (tem); |
2512 | err = cfsetspeed (&attr, XINT (tem)); | |
2513 | if (err != 0) | |
4e604a5d | 2514 | report_file_error ("Failed cfsetspeed", tem); |
d888760c GM |
2515 | childp2 = Fplist_put (childp2, QCspeed, tem); |
2516 | ||
2517 | /* Configure bytesize. */ | |
2518 | if (!NILP (Fplist_member (contact, QCbytesize))) | |
2519 | tem = Fplist_get (contact, QCbytesize); | |
2520 | else | |
4d2b044c | 2521 | tem = Fplist_get (p->childp, QCbytesize); |
d888760c GM |
2522 | if (NILP (tem)) |
2523 | tem = make_number (8); | |
2524 | CHECK_NUMBER (tem); | |
2525 | if (XINT (tem) != 7 && XINT (tem) != 8) | |
2526 | error (":bytesize must be nil (8), 7, or 8"); | |
cf84bb53 | 2527 | summary[0] = XINT (tem) + '0'; |
d888760c GM |
2528 | #if defined (CSIZE) && defined (CS7) && defined (CS8) |
2529 | attr.c_cflag &= ~CSIZE; | |
2530 | attr.c_cflag |= ((XINT (tem) == 7) ? CS7 : CS8); | |
2531 | #else | |
16bad4dd | 2532 | /* Don't error on bytesize 8, which should be set by cfmakeraw. */ |
d888760c GM |
2533 | if (XINT (tem) != 8) |
2534 | error ("Bytesize cannot be changed"); | |
2535 | #endif | |
2536 | childp2 = Fplist_put (childp2, QCbytesize, tem); | |
2537 | ||
2538 | /* Configure parity. */ | |
2539 | if (!NILP (Fplist_member (contact, QCparity))) | |
2540 | tem = Fplist_get (contact, QCparity); | |
2541 | else | |
4d2b044c | 2542 | tem = Fplist_get (p->childp, QCparity); |
d888760c GM |
2543 | if (!NILP (tem) && !EQ (tem, Qeven) && !EQ (tem, Qodd)) |
2544 | error (":parity must be nil (no parity), `even', or `odd'"); | |
2545 | #if defined (PARENB) && defined (PARODD) && defined (IGNPAR) && defined (INPCK) | |
2546 | attr.c_cflag &= ~(PARENB | PARODD); | |
2547 | attr.c_iflag &= ~(IGNPAR | INPCK); | |
2548 | if (NILP (tem)) | |
2549 | { | |
2550 | summary[1] = 'N'; | |
2551 | } | |
2552 | else if (EQ (tem, Qeven)) | |
2553 | { | |
2554 | summary[1] = 'E'; | |
2555 | attr.c_cflag |= PARENB; | |
2556 | attr.c_iflag |= (IGNPAR | INPCK); | |
2557 | } | |
2558 | else if (EQ (tem, Qodd)) | |
2559 | { | |
2560 | summary[1] = 'O'; | |
2561 | attr.c_cflag |= (PARENB | PARODD); | |
2562 | attr.c_iflag |= (IGNPAR | INPCK); | |
2563 | } | |
2564 | #else | |
16bad4dd | 2565 | /* Don't error on no parity, which should be set by cfmakeraw. */ |
d888760c GM |
2566 | if (!NILP (tem)) |
2567 | error ("Parity cannot be configured"); | |
2568 | #endif | |
2569 | childp2 = Fplist_put (childp2, QCparity, tem); | |
2570 | ||
2571 | /* Configure stopbits. */ | |
2572 | if (!NILP (Fplist_member (contact, QCstopbits))) | |
2573 | tem = Fplist_get (contact, QCstopbits); | |
2574 | else | |
4d2b044c | 2575 | tem = Fplist_get (p->childp, QCstopbits); |
d888760c GM |
2576 | if (NILP (tem)) |
2577 | tem = make_number (1); | |
2578 | CHECK_NUMBER (tem); | |
2579 | if (XINT (tem) != 1 && XINT (tem) != 2) | |
2580 | error (":stopbits must be nil (1 stopbit), 1, or 2"); | |
2581 | summary[2] = XINT (tem) + '0'; | |
2582 | #if defined (CSTOPB) | |
2583 | attr.c_cflag &= ~CSTOPB; | |
2584 | if (XINT (tem) == 2) | |
2585 | attr.c_cflag |= CSTOPB; | |
2586 | #else | |
16bad4dd | 2587 | /* Don't error on 1 stopbit, which should be set by cfmakeraw. */ |
d888760c GM |
2588 | if (XINT (tem) != 1) |
2589 | error ("Stopbits cannot be configured"); | |
2590 | #endif | |
2591 | childp2 = Fplist_put (childp2, QCstopbits, tem); | |
2592 | ||
2593 | /* Configure flowcontrol. */ | |
2594 | if (!NILP (Fplist_member (contact, QCflowcontrol))) | |
2595 | tem = Fplist_get (contact, QCflowcontrol); | |
2596 | else | |
4d2b044c | 2597 | tem = Fplist_get (p->childp, QCflowcontrol); |
d888760c GM |
2598 | if (!NILP (tem) && !EQ (tem, Qhw) && !EQ (tem, Qsw)) |
2599 | error (":flowcontrol must be nil (no flowcontrol), `hw', or `sw'"); | |
2600 | #if defined (CRTSCTS) | |
2601 | attr.c_cflag &= ~CRTSCTS; | |
2602 | #endif | |
2603 | #if defined (CNEW_RTSCTS) | |
2604 | attr.c_cflag &= ~CNEW_RTSCTS; | |
2605 | #endif | |
2606 | #if defined (IXON) && defined (IXOFF) | |
2607 | attr.c_iflag &= ~(IXON | IXOFF); | |
2608 | #endif | |
2609 | if (NILP (tem)) | |
2610 | { | |
2611 | /* Already configured. */ | |
2612 | } | |
2613 | else if (EQ (tem, Qhw)) | |
2614 | { | |
2615 | #if defined (CRTSCTS) | |
2616 | attr.c_cflag |= CRTSCTS; | |
2617 | #elif defined (CNEW_RTSCTS) | |
2618 | attr.c_cflag |= CNEW_RTSCTS; | |
2619 | #else | |
2620 | error ("Hardware flowcontrol (RTS/CTS) not supported"); | |
2621 | #endif | |
2622 | } | |
2623 | else if (EQ (tem, Qsw)) | |
2624 | { | |
2625 | #if defined (IXON) && defined (IXOFF) | |
2626 | attr.c_iflag |= (IXON | IXOFF); | |
2627 | #else | |
2628 | error ("Software flowcontrol (XON/XOFF) not supported"); | |
2629 | #endif | |
2630 | } | |
2631 | childp2 = Fplist_put (childp2, QCflowcontrol, tem); | |
2632 | ||
2633 | /* Activate configuration. */ | |
2634 | err = tcsetattr (p->outfd, TCSANOW, &attr); | |
2635 | if (err != 0) | |
4e604a5d | 2636 | report_file_error ("Failed tcsetattr", Qnil); |
d888760c GM |
2637 | |
2638 | childp2 = Fplist_put (childp2, QCsummary, build_string (summary)); | |
6a09a33b | 2639 | pset_childp (p, childp2); |
d888760c | 2640 | } |
a7ebc409 | 2641 | #endif /* not DOS_NT */ |
06e111a6 DN |
2642 | \f |
2643 | /* System depended enumeration of and access to system processes a-la ps(1). */ | |
2644 | ||
2645 | #ifdef HAVE_PROCFS | |
2646 | ||
2647 | /* Process enumeration and access via /proc. */ | |
2648 | ||
2649 | Lisp_Object | |
971de7fb | 2650 | list_system_processes (void) |
06e111a6 DN |
2651 | { |
2652 | Lisp_Object procdir, match, proclist, next; | |
2653 | struct gcpro gcpro1, gcpro2; | |
2654 | register Lisp_Object tail; | |
2655 | ||
2656 | GCPRO2 (procdir, match); | |
2657 | /* For every process on the system, there's a directory in the | |
2658 | "/proc" pseudo-directory whose name is the numeric ID of that | |
2659 | process. */ | |
2660 | procdir = build_string ("/proc"); | |
2661 | match = build_string ("[0-9]+"); | |
86ec63ba | 2662 | proclist = directory_files_internal (procdir, Qnil, match, Qt, 0, Qnil); |
06e111a6 DN |
2663 | |
2664 | /* `proclist' gives process IDs as strings. Destructively convert | |
2665 | each string into a number. */ | |
2666 | for (tail = proclist; CONSP (tail); tail = next) | |
2667 | { | |
2668 | next = XCDR (tail); | |
2669 | XSETCAR (tail, Fstring_to_number (XCAR (tail), Qnil)); | |
2670 | } | |
2671 | UNGCPRO; | |
2672 | ||
2673 | /* directory_files_internal returns the files in reverse order; undo | |
2674 | that. */ | |
2675 | proclist = Fnreverse (proclist); | |
2676 | return proclist; | |
2677 | } | |
2678 | ||
0845a75c | 2679 | #elif defined DARWIN_OS || defined __FreeBSD__ |
725eb027 | 2680 | |
b91b7e4d | 2681 | Lisp_Object |
5790543d | 2682 | list_system_processes (void) |
b91b7e4d | 2683 | { |
0845a75c | 2684 | #ifdef DARWIN_OS |
f01769f9 LL |
2685 | int mib[] = {CTL_KERN, KERN_PROC, KERN_PROC_ALL}; |
2686 | #else | |
b91b7e4d | 2687 | int mib[] = {CTL_KERN, KERN_PROC, KERN_PROC_PROC}; |
f01769f9 | 2688 | #endif |
b91b7e4d EW |
2689 | size_t len; |
2690 | struct kinfo_proc *procs; | |
2691 | size_t i; | |
2692 | ||
2693 | struct gcpro gcpro1; | |
2694 | Lisp_Object proclist = Qnil; | |
2695 | ||
2696 | if (sysctl (mib, 3, NULL, &len, NULL, 0) != 0) | |
2697 | return proclist; | |
5790543d | 2698 | |
b91b7e4d EW |
2699 | procs = xmalloc (len); |
2700 | if (sysctl (mib, 3, procs, &len, NULL, 0) != 0) | |
2701 | { | |
2702 | xfree (procs); | |
2703 | return proclist; | |
2704 | } | |
5790543d | 2705 | |
b91b7e4d EW |
2706 | GCPRO1 (proclist); |
2707 | len /= sizeof (struct kinfo_proc); | |
2708 | for (i = 0; i < len; i++) | |
f01769f9 | 2709 | { |
0845a75c | 2710 | #ifdef DARWIN_OS |
f01769f9 LL |
2711 | proclist = Fcons (make_fixnum_or_float (procs[i].kp_proc.p_pid), proclist); |
2712 | #else | |
2713 | proclist = Fcons (make_fixnum_or_float (procs[i].ki_pid), proclist); | |
2714 | #endif | |
2715 | } | |
b91b7e4d | 2716 | UNGCPRO; |
5790543d | 2717 | |
b91b7e4d EW |
2718 | xfree (procs); |
2719 | ||
2720 | return proclist; | |
2721 | } | |
2722 | ||
f8d23104 DN |
2723 | /* The WINDOWSNT implementation is in w32.c. |
2724 | The MSDOS implementation is in dosfns.c. */ | |
c4605e09 | 2725 | #elif !defined (WINDOWSNT) && !defined (MSDOS) |
06e111a6 DN |
2726 | |
2727 | Lisp_Object | |
cf84bb53 | 2728 | list_system_processes (void) |
06e111a6 DN |
2729 | { |
2730 | return Qnil; | |
2731 | } | |
91c85b70 EZ |
2732 | |
2733 | #endif /* !defined (WINDOWSNT) */ | |
06e111a6 | 2734 | |
29abe551 | 2735 | #if defined GNU_LINUX && defined HAVE_LONG_LONG_INT |
43aac990 | 2736 | static struct timespec |
d35af63c PE |
2737 | time_from_jiffies (unsigned long long tval, long hz) |
2738 | { | |
2739 | unsigned long long s = tval / hz; | |
2740 | unsigned long long frac = tval % hz; | |
2741 | int ns; | |
d35af63c PE |
2742 | |
2743 | if (TYPE_MAXIMUM (time_t) < s) | |
2744 | time_overflow (); | |
43aac990 PE |
2745 | if (LONG_MAX - 1 <= ULLONG_MAX / TIMESPEC_RESOLUTION |
2746 | || frac <= ULLONG_MAX / TIMESPEC_RESOLUTION) | |
2747 | ns = frac * TIMESPEC_RESOLUTION / hz; | |
06e111a6 | 2748 | else |
d35af63c PE |
2749 | { |
2750 | /* This is reachable only in the unlikely case that HZ * HZ | |
2751 | exceeds ULLONG_MAX. It calculates an approximation that is | |
2752 | guaranteed to be in range. */ | |
43aac990 PE |
2753 | long hz_per_ns = (hz / TIMESPEC_RESOLUTION |
2754 | + (hz % TIMESPEC_RESOLUTION != 0)); | |
d35af63c PE |
2755 | ns = frac / hz_per_ns; |
2756 | } | |
2757 | ||
43aac990 | 2758 | return make_timespec (s, ns); |
06e111a6 DN |
2759 | } |
2760 | ||
2761 | static Lisp_Object | |
2762 | ltime_from_jiffies (unsigned long long tval, long hz) | |
2763 | { | |
43aac990 | 2764 | struct timespec t = time_from_jiffies (tval, hz); |
d35af63c | 2765 | return make_lisp_time (t); |
06e111a6 DN |
2766 | } |
2767 | ||
43aac990 | 2768 | static struct timespec |
d35af63c | 2769 | get_up_time (void) |
06e111a6 DN |
2770 | { |
2771 | FILE *fup; | |
43aac990 | 2772 | struct timespec up = make_timespec (0, 0); |
06e111a6 | 2773 | |
4d7e6e51 | 2774 | block_input (); |
406af475 | 2775 | fup = emacs_fopen ("/proc/uptime", "r"); |
06e111a6 DN |
2776 | |
2777 | if (fup) | |
2778 | { | |
d35af63c PE |
2779 | unsigned long long upsec, upfrac, idlesec, idlefrac; |
2780 | int upfrac_start, upfrac_end, idlefrac_start, idlefrac_end; | |
06e111a6 | 2781 | |
d35af63c PE |
2782 | if (fscanf (fup, "%llu.%n%llu%n %llu.%n%llu%n", |
2783 | &upsec, &upfrac_start, &upfrac, &upfrac_end, | |
2784 | &idlesec, &idlefrac_start, &idlefrac, &idlefrac_end) | |
2785 | == 4) | |
06e111a6 | 2786 | { |
d35af63c PE |
2787 | if (TYPE_MAXIMUM (time_t) < upsec) |
2788 | { | |
2789 | upsec = TYPE_MAXIMUM (time_t); | |
43aac990 | 2790 | upfrac = TIMESPEC_RESOLUTION - 1; |
d35af63c PE |
2791 | } |
2792 | else | |
2793 | { | |
2794 | int upfraclen = upfrac_end - upfrac_start; | |
43aac990 | 2795 | for (; upfraclen < LOG10_TIMESPEC_RESOLUTION; upfraclen++) |
d35af63c | 2796 | upfrac *= 10; |
43aac990 | 2797 | for (; LOG10_TIMESPEC_RESOLUTION < upfraclen; upfraclen--) |
d35af63c | 2798 | upfrac /= 10; |
43aac990 | 2799 | upfrac = min (upfrac, TIMESPEC_RESOLUTION - 1); |
d35af63c | 2800 | } |
43aac990 | 2801 | up = make_timespec (upsec, upfrac); |
06e111a6 DN |
2802 | } |
2803 | fclose (fup); | |
2804 | } | |
4d7e6e51 | 2805 | unblock_input (); |
d35af63c PE |
2806 | |
2807 | return up; | |
06e111a6 DN |
2808 | } |
2809 | ||
2810 | #define MAJOR(d) (((unsigned)(d) >> 8) & 0xfff) | |
2811 | #define MINOR(d) (((unsigned)(d) & 0xff) | (((unsigned)(d) & 0xfff00000) >> 12)) | |
2812 | ||
2813 | static Lisp_Object | |
f4f634e8 | 2814 | procfs_ttyname (int rdev) |
06e111a6 | 2815 | { |
ab9980cd | 2816 | FILE *fdev; |
06e111a6 DN |
2817 | char name[PATH_MAX]; |
2818 | ||
4d7e6e51 | 2819 | block_input (); |
406af475 | 2820 | fdev = emacs_fopen ("/proc/tty/drivers", "r"); |
ab9980cd | 2821 | name[0] = 0; |
06e111a6 DN |
2822 | |
2823 | if (fdev) | |
2824 | { | |
2825 | unsigned major; | |
2826 | unsigned long minor_beg, minor_end; | |
2827 | char minor[25]; /* 2 32-bit numbers + dash */ | |
2828 | char *endp; | |
2829 | ||
ab9980cd | 2830 | for (; !feof (fdev) && !ferror (fdev); name[0] = 0) |
06e111a6 | 2831 | { |
908589fd | 2832 | if (fscanf (fdev, "%*s %s %u %s %*s\n", name, &major, minor) >= 3 |
06e111a6 DN |
2833 | && major == MAJOR (rdev)) |
2834 | { | |
2835 | minor_beg = strtoul (minor, &endp, 0); | |
2836 | if (*endp == '\0') | |
2837 | minor_end = minor_beg; | |
2838 | else if (*endp == '-') | |
2839 | minor_end = strtoul (endp + 1, &endp, 0); | |
2840 | else | |
2841 | continue; | |
2842 | ||
2843 | if (MINOR (rdev) >= minor_beg && MINOR (rdev) <= minor_end) | |
2844 | { | |
10d66ec0 | 2845 | sprintf (name + strlen (name), "%u", MINOR (rdev)); |
06e111a6 DN |
2846 | break; |
2847 | } | |
2848 | } | |
2849 | } | |
2850 | fclose (fdev); | |
2851 | } | |
4d7e6e51 | 2852 | unblock_input (); |
06e111a6 DN |
2853 | return build_string (name); |
2854 | } | |
2855 | ||
9c05bccf | 2856 | static uintmax_t |
06e111a6 DN |
2857 | procfs_get_total_memory (void) |
2858 | { | |
ab9980cd | 2859 | FILE *fmem; |
9c05bccf PE |
2860 | uintmax_t retval = 2 * 1024 * 1024; /* default: 2 GiB */ |
2861 | int c; | |
06e111a6 | 2862 | |
4d7e6e51 | 2863 | block_input (); |
406af475 | 2864 | fmem = emacs_fopen ("/proc/meminfo", "r"); |
06e111a6 DN |
2865 | |
2866 | if (fmem) | |
2867 | { | |
9c05bccf PE |
2868 | uintmax_t entry_value; |
2869 | bool done; | |
2870 | ||
2871 | do | |
2872 | switch (fscanf (fmem, "MemTotal: %"SCNuMAX, &entry_value)) | |
2873 | { | |
2874 | case 1: | |
2875 | retval = entry_value; | |
2876 | done = 1; | |
2877 | break; | |
2878 | ||
2879 | case 0: | |
2880 | while ((c = getc (fmem)) != EOF && c != '\n') | |
2881 | continue; | |
2882 | done = c == EOF; | |
2883 | break; | |
2884 | ||
2885 | default: | |
2886 | done = 1; | |
2887 | break; | |
2888 | } | |
2889 | while (!done); | |
06e111a6 | 2890 | |
06e111a6 DN |
2891 | fclose (fmem); |
2892 | } | |
4d7e6e51 | 2893 | unblock_input (); |
06e111a6 DN |
2894 | return retval; |
2895 | } | |
2896 | ||
2897 | Lisp_Object | |
f4f634e8 | 2898 | system_process_attributes (Lisp_Object pid) |
06e111a6 DN |
2899 | { |
2900 | char procfn[PATH_MAX], fn[PATH_MAX]; | |
2901 | struct stat st; | |
2902 | struct passwd *pw; | |
2903 | struct group *gr; | |
2904 | long clocks_per_sec; | |
2905 | char *procfn_end; | |
2906 | char procbuf[1025], *p, *q; | |
2907 | int fd; | |
2908 | ssize_t nread; | |
e99a530f PE |
2909 | static char const default_cmd[] = "???"; |
2910 | const char *cmd = default_cmd; | |
2911 | int cmdsize = sizeof default_cmd - 1; | |
06e111a6 | 2912 | char *cmdline = NULL; |
e99a530f | 2913 | ptrdiff_t cmdline_size; |
ab9980cd | 2914 | char c; |
d311d28c PE |
2915 | printmax_t proc_id; |
2916 | int ppid, pgrp, sess, tty, tpgid, thcount; | |
2917 | uid_t uid; | |
2918 | gid_t gid; | |
a70072c9 PE |
2919 | unsigned long long u_time, s_time, cutime, cstime, start; |
2920 | long priority, niceness, rss; | |
06e111a6 | 2921 | unsigned long minflt, majflt, cminflt, cmajflt, vsize; |
43aac990 | 2922 | struct timespec tnow, tstart, tboot, telapsed, us_time; |
06e111a6 DN |
2923 | double pcpu, pmem; |
2924 | Lisp_Object attrs = Qnil; | |
ab9980cd PE |
2925 | Lisp_Object cmd_str, decoded_cmd; |
2926 | ptrdiff_t count; | |
06e111a6 | 2927 | struct gcpro gcpro1, gcpro2; |
06e111a6 DN |
2928 | |
2929 | CHECK_NUMBER_OR_FLOAT (pid); | |
225a2cff | 2930 | CONS_TO_INTEGER (pid, pid_t, proc_id); |
d311d28c | 2931 | sprintf (procfn, "/proc/%"pMd, proc_id); |
06e111a6 DN |
2932 | if (stat (procfn, &st) < 0) |
2933 | return attrs; | |
2934 | ||
2935 | GCPRO2 (attrs, decoded_cmd); | |
2936 | ||
2937 | /* euid egid */ | |
2938 | uid = st.st_uid; | |
d311d28c | 2939 | attrs = Fcons (Fcons (Qeuid, make_fixnum_or_float (uid)), attrs); |
4d7e6e51 | 2940 | block_input (); |
06e111a6 | 2941 | pw = getpwuid (uid); |
4d7e6e51 | 2942 | unblock_input (); |
06e111a6 DN |
2943 | if (pw) |
2944 | attrs = Fcons (Fcons (Quser, build_string (pw->pw_name)), attrs); | |
2945 | ||
2946 | gid = st.st_gid; | |
d311d28c | 2947 | attrs = Fcons (Fcons (Qegid, make_fixnum_or_float (gid)), attrs); |
4d7e6e51 | 2948 | block_input (); |
06e111a6 | 2949 | gr = getgrgid (gid); |
4d7e6e51 | 2950 | unblock_input (); |
06e111a6 DN |
2951 | if (gr) |
2952 | attrs = Fcons (Fcons (Qgroup, build_string (gr->gr_name)), attrs); | |
2953 | ||
ab9980cd | 2954 | count = SPECPDL_INDEX (); |
06e111a6 DN |
2955 | strcpy (fn, procfn); |
2956 | procfn_end = fn + strlen (fn); | |
2957 | strcpy (procfn_end, "/stat"); | |
2958 | fd = emacs_open (fn, O_RDONLY, 0); | |
ab9980cd PE |
2959 | if (fd < 0) |
2960 | nread = 0; | |
2961 | else | |
2962 | { | |
2963 | record_unwind_protect_int (close_file_unwind, fd); | |
2964 | nread = emacs_read (fd, procbuf, sizeof procbuf - 1); | |
2965 | } | |
2966 | if (0 < nread) | |
06e111a6 DN |
2967 | { |
2968 | procbuf[nread] = '\0'; | |
2969 | p = procbuf; | |
2970 | ||
2971 | p = strchr (p, '('); | |
2972 | if (p != NULL) | |
2973 | { | |
2974 | q = strrchr (p + 1, ')'); | |
2975 | /* comm */ | |
2976 | if (q != NULL) | |
2977 | { | |
2978 | cmd = p + 1; | |
2979 | cmdsize = q - cmd; | |
2980 | } | |
2981 | } | |
2982 | else | |
2983 | q = NULL; | |
06e111a6 DN |
2984 | /* Command name is encoded in locale-coding-system; decode it. */ |
2985 | cmd_str = make_unibyte_string (cmd, cmdsize); | |
2986 | decoded_cmd = code_convert_string_norecord (cmd_str, | |
2987 | Vlocale_coding_system, 0); | |
2988 | attrs = Fcons (Fcons (Qcomm, decoded_cmd), attrs); | |
2989 | ||
ab9980cd PE |
2990 | /* state ppid pgrp sess tty tpgid . minflt cminflt majflt cmajflt |
2991 | utime stime cutime cstime priority nice thcount . start vsize rss */ | |
2992 | if (q | |
2993 | && (sscanf (q + 2, ("%c %d %d %d %d %d %*u %lu %lu %lu %lu " | |
2994 | "%Lu %Lu %Lu %Lu %ld %ld %d %*d %Lu %lu %ld"), | |
2995 | &c, &ppid, &pgrp, &sess, &tty, &tpgid, | |
2996 | &minflt, &cminflt, &majflt, &cmajflt, | |
2997 | &u_time, &s_time, &cutime, &cstime, | |
2998 | &priority, &niceness, &thcount, &start, &vsize, &rss) | |
2999 | == 20)) | |
06e111a6 | 3000 | { |
ab9980cd PE |
3001 | char state_str[2]; |
3002 | state_str[0] = c; | |
3003 | state_str[1] = '\0'; | |
3004 | attrs = Fcons (Fcons (Qstate, build_string (state_str)), attrs); | |
3005 | attrs = Fcons (Fcons (Qppid, make_fixnum_or_float (ppid)), attrs); | |
3006 | attrs = Fcons (Fcons (Qpgrp, make_fixnum_or_float (pgrp)), attrs); | |
3007 | attrs = Fcons (Fcons (Qsess, make_fixnum_or_float (sess)), attrs); | |
06e111a6 | 3008 | attrs = Fcons (Fcons (Qttname, procfs_ttyname (tty)), attrs); |
ab9980cd | 3009 | attrs = Fcons (Fcons (Qtpgid, make_fixnum_or_float (tpgid)), attrs); |
06e111a6 DN |
3010 | attrs = Fcons (Fcons (Qminflt, make_fixnum_or_float (minflt)), attrs); |
3011 | attrs = Fcons (Fcons (Qmajflt, make_fixnum_or_float (majflt)), attrs); | |
ab9980cd PE |
3012 | attrs = Fcons (Fcons (Qcminflt, make_fixnum_or_float (cminflt)), |
3013 | attrs); | |
3014 | attrs = Fcons (Fcons (Qcmajflt, make_fixnum_or_float (cmajflt)), | |
3015 | attrs); | |
06e111a6 DN |
3016 | clocks_per_sec = sysconf (_SC_CLK_TCK); |
3017 | if (clocks_per_sec < 0) | |
3018 | clocks_per_sec = 100; | |
3019 | attrs = Fcons (Fcons (Qutime, | |
a70072c9 | 3020 | ltime_from_jiffies (u_time, clocks_per_sec)), |
06e111a6 DN |
3021 | attrs); |
3022 | attrs = Fcons (Fcons (Qstime, | |
a70072c9 | 3023 | ltime_from_jiffies (s_time, clocks_per_sec)), |
06e111a6 | 3024 | attrs); |
ac1e4171 | 3025 | attrs = Fcons (Fcons (Qtime, |
a70072c9 PE |
3026 | ltime_from_jiffies (s_time + u_time, |
3027 | clocks_per_sec)), | |
ac1e4171 | 3028 | attrs); |
06e111a6 DN |
3029 | attrs = Fcons (Fcons (Qcutime, |
3030 | ltime_from_jiffies (cutime, clocks_per_sec)), | |
3031 | attrs); | |
3032 | attrs = Fcons (Fcons (Qcstime, | |
3033 | ltime_from_jiffies (cstime, clocks_per_sec)), | |
ac1e4171 EZ |
3034 | attrs); |
3035 | attrs = Fcons (Fcons (Qctime, | |
ab9980cd PE |
3036 | ltime_from_jiffies (cstime + cutime, |
3037 | clocks_per_sec)), | |
06e111a6 DN |
3038 | attrs); |
3039 | attrs = Fcons (Fcons (Qpri, make_number (priority)), attrs); | |
a70072c9 | 3040 | attrs = Fcons (Fcons (Qnice, make_number (niceness)), attrs); |
ab9980cd PE |
3041 | attrs = Fcons (Fcons (Qthcount, make_fixnum_or_float (thcount)), |
3042 | attrs); | |
43aac990 | 3043 | tnow = current_timespec (); |
d35af63c | 3044 | telapsed = get_up_time (); |
43aac990 | 3045 | tboot = timespec_sub (tnow, telapsed); |
d35af63c | 3046 | tstart = time_from_jiffies (start, clocks_per_sec); |
43aac990 | 3047 | tstart = timespec_add (tboot, tstart); |
d35af63c | 3048 | attrs = Fcons (Fcons (Qstart, make_lisp_time (tstart)), attrs); |
ab9980cd PE |
3049 | attrs = Fcons (Fcons (Qvsize, make_fixnum_or_float (vsize / 1024)), |
3050 | attrs); | |
3051 | attrs = Fcons (Fcons (Qrss, make_fixnum_or_float (4 * rss)), attrs); | |
43aac990 | 3052 | telapsed = timespec_sub (tnow, tstart); |
d35af63c PE |
3053 | attrs = Fcons (Fcons (Qetime, make_lisp_time (telapsed)), attrs); |
3054 | us_time = time_from_jiffies (u_time + s_time, clocks_per_sec); | |
43aac990 | 3055 | pcpu = timespectod (us_time) / timespectod (telapsed); |
06e111a6 DN |
3056 | if (pcpu > 1.0) |
3057 | pcpu = 1.0; | |
3058 | attrs = Fcons (Fcons (Qpcpu, make_float (100 * pcpu)), attrs); | |
3059 | pmem = 4.0 * 100 * rss / procfs_get_total_memory (); | |
3060 | if (pmem > 100) | |
3061 | pmem = 100; | |
3062 | attrs = Fcons (Fcons (Qpmem, make_float (pmem)), attrs); | |
3063 | } | |
3064 | } | |
ab9980cd | 3065 | unbind_to (count, Qnil); |
06e111a6 DN |
3066 | |
3067 | /* args */ | |
3068 | strcpy (procfn_end, "/cmdline"); | |
3069 | fd = emacs_open (fn, O_RDONLY, 0); | |
3070 | if (fd >= 0) | |
3071 | { | |
ab9980cd PE |
3072 | ptrdiff_t readsize, nread_incr; |
3073 | record_unwind_protect_int (close_file_unwind, fd); | |
3074 | record_unwind_protect_nothing (); | |
3075 | nread = cmdline_size = 0; | |
3076 | ||
3077 | do | |
06e111a6 | 3078 | { |
ab9980cd PE |
3079 | cmdline = xpalloc (cmdline, &cmdline_size, 2, STRING_BYTES_BOUND, 1); |
3080 | set_unwind_protect_ptr (count + 1, xfree, cmdline); | |
3081 | ||
3082 | /* Leave room even if every byte needs escaping below. */ | |
3083 | readsize = (cmdline_size >> 1) - nread; | |
3084 | ||
3085 | nread_incr = emacs_read (fd, cmdline + nread, readsize); | |
3086 | nread += max (0, nread_incr); | |
06e111a6 | 3087 | } |
ab9980cd PE |
3088 | while (nread_incr == readsize); |
3089 | ||
3090 | if (nread) | |
06e111a6 | 3091 | { |
06e111a6 | 3092 | /* We don't want trailing null characters. */ |
ab9980cd PE |
3093 | for (p = cmdline + nread; cmdline < p && !p[-1]; p--) |
3094 | continue; | |
3095 | ||
3096 | /* Escape-quote whitespace and backslashes. */ | |
3097 | q = cmdline + cmdline_size; | |
3098 | while (cmdline < p) | |
06e111a6 | 3099 | { |
ab9980cd PE |
3100 | char c = *--p; |
3101 | *--q = c ? c : ' '; | |
3102 | if (c_isspace (c) || c == '\\') | |
3103 | *--q = '\\'; | |
06e111a6 | 3104 | } |
ab9980cd PE |
3105 | |
3106 | nread = cmdline + cmdline_size - q; | |
06e111a6 | 3107 | } |
ab9980cd PE |
3108 | |
3109 | if (!nread) | |
06e111a6 | 3110 | { |
ab9980cd PE |
3111 | nread = cmdsize + 2; |
3112 | cmdline_size = nread + 1; | |
3113 | q = cmdline = xrealloc (cmdline, cmdline_size); | |
3114 | set_unwind_protect_ptr (count + 1, xfree, cmdline); | |
e99a530f | 3115 | sprintf (cmdline, "[%.*s]", cmdsize, cmd); |
06e111a6 | 3116 | } |
06e111a6 | 3117 | /* Command line is encoded in locale-coding-system; decode it. */ |
ab9980cd | 3118 | cmd_str = make_unibyte_string (q, nread); |
06e111a6 DN |
3119 | decoded_cmd = code_convert_string_norecord (cmd_str, |
3120 | Vlocale_coding_system, 0); | |
ab9980cd | 3121 | unbind_to (count, Qnil); |
06e111a6 DN |
3122 | attrs = Fcons (Fcons (Qargs, decoded_cmd), attrs); |
3123 | } | |
3124 | ||
3125 | UNGCPRO; | |
3126 | return attrs; | |
3127 | } | |
91c85b70 | 3128 | |
f4f634e8 DN |
3129 | #elif defined (SOLARIS2) && defined (HAVE_PROCFS) |
3130 | ||
3131 | /* The <procfs.h> header does not like to be included if _LP64 is defined and | |
3132 | __FILE_OFFSET_BITS == 64. This is an ugly workaround that. */ | |
3133 | #if !defined (_LP64) && defined (_FILE_OFFSET_BITS) && (_FILE_OFFSET_BITS == 64) | |
3134 | #define PROCFS_FILE_OFFSET_BITS_HACK 1 | |
3135 | #undef _FILE_OFFSET_BITS | |
3136 | #else | |
3137 | #define PROCFS_FILE_OFFSET_BITS_HACK 0 | |
3138 | #endif | |
3139 | ||
3140 | #include <procfs.h> | |
3141 | ||
3142 | #if PROCFS_FILE_OFFSET_BITS_HACK == 1 | |
3143 | #define _FILE_OFFSET_BITS 64 | |
90efadd1 PE |
3144 | #ifdef _FILE_OFFSET_BITS /* Avoid unused-macro warnings. */ |
3145 | #endif | |
f4f634e8 DN |
3146 | #endif /* PROCFS_FILE_OFFSET_BITS_HACK == 1 */ |
3147 | ||
3148 | Lisp_Object | |
3149 | system_process_attributes (Lisp_Object pid) | |
3150 | { | |
3151 | char procfn[PATH_MAX], fn[PATH_MAX]; | |
3152 | struct stat st; | |
3153 | struct passwd *pw; | |
3154 | struct group *gr; | |
3155 | char *procfn_end; | |
3156 | struct psinfo pinfo; | |
3157 | int fd; | |
3158 | ssize_t nread; | |
d311d28c PE |
3159 | printmax_t proc_id; |
3160 | uid_t uid; | |
3161 | gid_t gid; | |
f4f634e8 | 3162 | Lisp_Object attrs = Qnil; |
ab9980cd | 3163 | Lisp_Object decoded_cmd; |
f4f634e8 | 3164 | struct gcpro gcpro1, gcpro2; |
ab9980cd | 3165 | ptrdiff_t count; |
f4f634e8 DN |
3166 | |
3167 | CHECK_NUMBER_OR_FLOAT (pid); | |
225a2cff | 3168 | CONS_TO_INTEGER (pid, pid_t, proc_id); |
d311d28c | 3169 | sprintf (procfn, "/proc/%"pMd, proc_id); |
f4f634e8 DN |
3170 | if (stat (procfn, &st) < 0) |
3171 | return attrs; | |
3172 | ||
3173 | GCPRO2 (attrs, decoded_cmd); | |
3174 | ||
3175 | /* euid egid */ | |
3176 | uid = st.st_uid; | |
d311d28c | 3177 | attrs = Fcons (Fcons (Qeuid, make_fixnum_or_float (uid)), attrs); |
4d7e6e51 | 3178 | block_input (); |
f4f634e8 | 3179 | pw = getpwuid (uid); |
4d7e6e51 | 3180 | unblock_input (); |
f4f634e8 DN |
3181 | if (pw) |
3182 | attrs = Fcons (Fcons (Quser, build_string (pw->pw_name)), attrs); | |
3183 | ||
3184 | gid = st.st_gid; | |
d311d28c | 3185 | attrs = Fcons (Fcons (Qegid, make_fixnum_or_float (gid)), attrs); |
4d7e6e51 | 3186 | block_input (); |
f4f634e8 | 3187 | gr = getgrgid (gid); |
4d7e6e51 | 3188 | unblock_input (); |
f4f634e8 DN |
3189 | if (gr) |
3190 | attrs = Fcons (Fcons (Qgroup, build_string (gr->gr_name)), attrs); | |
3191 | ||
ab9980cd | 3192 | count = SPECPDL_INDEX (); |
f4f634e8 DN |
3193 | strcpy (fn, procfn); |
3194 | procfn_end = fn + strlen (fn); | |
3195 | strcpy (procfn_end, "/psinfo"); | |
3196 | fd = emacs_open (fn, O_RDONLY, 0); | |
ab9980cd PE |
3197 | if (fd < 0) |
3198 | nread = 0; | |
3199 | else | |
f4f634e8 | 3200 | { |
ab9980cd PE |
3201 | record_unwind_protect (close_file_unwind, fd); |
3202 | nread = emacs_read (fd, &pinfo, sizeof pinfo); | |
f4f634e8 DN |
3203 | } |
3204 | ||
ab9980cd PE |
3205 | if (nread == sizeof pinfo) |
3206 | { | |
3207 | attrs = Fcons (Fcons (Qppid, make_fixnum_or_float (pinfo.pr_ppid)), attrs); | |
3208 | attrs = Fcons (Fcons (Qpgrp, make_fixnum_or_float (pinfo.pr_pgid)), attrs); | |
3209 | attrs = Fcons (Fcons (Qsess, make_fixnum_or_float (pinfo.pr_sid)), attrs); | |
3210 | ||
3211 | { | |
3212 | char state_str[2]; | |
3213 | state_str[0] = pinfo.pr_lwp.pr_sname; | |
3214 | state_str[1] = '\0'; | |
3215 | attrs = Fcons (Fcons (Qstate, build_string (state_str)), attrs); | |
3216 | } | |
2d2d05d8 | 3217 | |
ab9980cd PE |
3218 | /* FIXME: missing Qttyname. psinfo.pr_ttydev is a dev_t, |
3219 | need to get a string from it. */ | |
3220 | ||
3221 | /* FIXME: missing: Qtpgid */ | |
3222 | ||
3223 | /* FIXME: missing: | |
3224 | Qminflt | |
3225 | Qmajflt | |
3226 | Qcminflt | |
3227 | Qcmajflt | |
3228 | ||
3229 | Qutime | |
3230 | Qcutime | |
3231 | Qstime | |
3232 | Qcstime | |
3233 | Are they available? */ | |
3234 | ||
3235 | attrs = Fcons (Fcons (Qtime, make_lisp_time (pinfo.pr_time)), attrs); | |
3236 | attrs = Fcons (Fcons (Qctime, make_lisp_time (pinfo.pr_ctime)), attrs); | |
3237 | attrs = Fcons (Fcons (Qpri, make_number (pinfo.pr_lwp.pr_pri)), attrs); | |
3238 | attrs = Fcons (Fcons (Qnice, make_number (pinfo.pr_lwp.pr_nice)), attrs); | |
3239 | attrs = Fcons (Fcons (Qthcount, make_fixnum_or_float (pinfo.pr_nlwp)), | |
3240 | attrs); | |
3241 | ||
3242 | attrs = Fcons (Fcons (Qstart, make_lisp_time (pinfo.pr_start)), attrs); | |
3243 | attrs = Fcons (Fcons (Qvsize, make_fixnum_or_float (pinfo.pr_size)), | |
3244 | attrs); | |
3245 | attrs = Fcons (Fcons (Qrss, make_fixnum_or_float (pinfo.pr_rssize)), | |
3246 | attrs); | |
3247 | ||
3248 | /* pr_pctcpu and pr_pctmem are unsigned integers in the | |
3249 | range 0 .. 2**15, representing 0.0 .. 1.0. */ | |
3250 | attrs = Fcons (Fcons (Qpcpu, | |
3251 | make_float (100.0 / 0x8000 * pinfo.pr_pctcpu)), | |
3252 | attrs); | |
3253 | attrs = Fcons (Fcons (Qpmem, | |
3254 | make_float (100.0 / 0x8000 * pinfo.pr_pctmem)), | |
3255 | attrs); | |
3256 | ||
3257 | decoded_cmd = (code_convert_string_norecord | |
309f24d1 | 3258 | (build_unibyte_string (pinfo.pr_fname), |
ab9980cd PE |
3259 | Vlocale_coding_system, 0)); |
3260 | attrs = Fcons (Fcons (Qcomm, decoded_cmd), attrs); | |
3261 | decoded_cmd = (code_convert_string_norecord | |
309f24d1 | 3262 | (build_unibyte_string (pinfo.pr_psargs), |
ab9980cd PE |
3263 | Vlocale_coding_system, 0)); |
3264 | attrs = Fcons (Fcons (Qargs, decoded_cmd), attrs); | |
3265 | } | |
3266 | unbind_to (count, Qnil); | |
f4f634e8 DN |
3267 | UNGCPRO; |
3268 | return attrs; | |
3269 | } | |
06e111a6 | 3270 | |
5790543d | 3271 | #elif defined __FreeBSD__ |
b91b7e4d | 3272 | |
43aac990 PE |
3273 | static struct timespec |
3274 | timeval_to_timespec (struct timeval t) | |
d054f3fb | 3275 | { |
43aac990 | 3276 | return make_timespec (t.tv_sec, t.tv_usec * 1000); |
d054f3fb PE |
3277 | } |
3278 | ||
3279 | static Lisp_Object | |
db7b8d06 | 3280 | make_lisp_timeval (struct timeval t) |
d054f3fb | 3281 | { |
43aac990 | 3282 | return make_lisp_time (timeval_to_timespec (t)); |
d054f3fb PE |
3283 | } |
3284 | ||
b91b7e4d EW |
3285 | Lisp_Object |
3286 | system_process_attributes (Lisp_Object pid) | |
3287 | { | |
3288 | int proc_id; | |
5790543d | 3289 | int pagesize = getpagesize (); |
9c05bccf | 3290 | unsigned long npages; |
b91b7e4d EW |
3291 | int fscale; |
3292 | struct passwd *pw; | |
3293 | struct group *gr; | |
3294 | char *ttyname; | |
3295 | size_t len; | |
3296 | char args[MAXPATHLEN]; | |
43aac990 | 3297 | struct timespec t, now; |
5790543d | 3298 | |
b91b7e4d EW |
3299 | int mib[4] = {CTL_KERN, KERN_PROC, KERN_PROC_PID}; |
3300 | struct kinfo_proc proc; | |
5790543d | 3301 | size_t proclen = sizeof proc; |
b91b7e4d EW |
3302 | |
3303 | struct gcpro gcpro1, gcpro2; | |
3304 | Lisp_Object attrs = Qnil; | |
3305 | Lisp_Object decoded_comm; | |
5790543d | 3306 | |
b91b7e4d | 3307 | CHECK_NUMBER_OR_FLOAT (pid); |
af52196c | 3308 | CONS_TO_INTEGER (pid, int, proc_id); |
b91b7e4d | 3309 | mib[3] = proc_id; |
5790543d | 3310 | |
b91b7e4d EW |
3311 | if (sysctl (mib, 4, &proc, &proclen, NULL, 0) != 0) |
3312 | return attrs; | |
3313 | ||
3314 | GCPRO2 (attrs, decoded_comm); | |
5790543d PE |
3315 | |
3316 | attrs = Fcons (Fcons (Qeuid, make_fixnum_or_float (proc.ki_uid)), attrs); | |
3317 | ||
4d7e6e51 | 3318 | block_input (); |
b91b7e4d | 3319 | pw = getpwuid (proc.ki_uid); |
4d7e6e51 | 3320 | unblock_input (); |
b91b7e4d EW |
3321 | if (pw) |
3322 | attrs = Fcons (Fcons (Quser, build_string (pw->pw_name)), attrs); | |
3323 | ||
5790543d | 3324 | attrs = Fcons (Fcons (Qegid, make_fixnum_or_float (proc.ki_svgid)), attrs); |
b91b7e4d | 3325 | |
4d7e6e51 | 3326 | block_input (); |
b91b7e4d | 3327 | gr = getgrgid (proc.ki_svgid); |
4d7e6e51 | 3328 | unblock_input (); |
b91b7e4d EW |
3329 | if (gr) |
3330 | attrs = Fcons (Fcons (Qgroup, build_string (gr->gr_name)), attrs); | |
3331 | ||
309f24d1 DA |
3332 | decoded_comm = (code_convert_string_norecord |
3333 | (build_unibyte_string (proc.ki_comm), | |
3334 | Vlocale_coding_system, 0)); | |
5790543d | 3335 | |
b91b7e4d EW |
3336 | attrs = Fcons (Fcons (Qcomm, decoded_comm), attrs); |
3337 | { | |
3338 | char state[2] = {'\0', '\0'}; | |
3339 | switch (proc.ki_stat) | |
3340 | { | |
3341 | case SRUN: | |
3342 | state[0] = 'R'; | |
3343 | break; | |
3344 | ||
3345 | case SSLEEP: | |
3346 | state[0] = 'S'; | |
3347 | break; | |
5790543d | 3348 | |
b91b7e4d EW |
3349 | case SLOCK: |
3350 | state[0] = 'D'; | |
3351 | break; | |
3352 | ||
3353 | case SZOMB: | |
3354 | state[0] = 'Z'; | |
3355 | break; | |
5790543d | 3356 | |
b91b7e4d EW |
3357 | case SSTOP: |
3358 | state[0] = 'T'; | |
3359 | break; | |
3360 | } | |
3361 | attrs = Fcons (Fcons (Qstate, build_string (state)), attrs); | |
3362 | } | |
5790543d | 3363 | |
b91b7e4d EW |
3364 | attrs = Fcons (Fcons (Qppid, make_fixnum_or_float (proc.ki_ppid)), attrs); |
3365 | attrs = Fcons (Fcons (Qpgrp, make_fixnum_or_float (proc.ki_pgid)), attrs); | |
3366 | attrs = Fcons (Fcons (Qsess, make_fixnum_or_float (proc.ki_sid)), attrs); | |
3367 | ||
4d7e6e51 | 3368 | block_input (); |
b91b7e4d | 3369 | ttyname = proc.ki_tdev == NODEV ? NULL : devname (proc.ki_tdev, S_IFCHR); |
4d7e6e51 | 3370 | unblock_input (); |
b91b7e4d EW |
3371 | if (ttyname) |
3372 | attrs = Fcons (Fcons (Qtty, build_string (ttyname)), attrs); | |
5790543d | 3373 | |
b91b7e4d EW |
3374 | attrs = Fcons (Fcons (Qtpgid, make_fixnum_or_float (proc.ki_tpgid)), attrs); |
3375 | attrs = Fcons (Fcons (Qminflt, make_fixnum_or_float (proc.ki_rusage.ru_minflt)), attrs); | |
3376 | attrs = Fcons (Fcons (Qmajflt, make_fixnum_or_float (proc.ki_rusage.ru_majflt)), attrs); | |
3377 | attrs = Fcons (Fcons (Qcminflt, make_number (proc.ki_rusage_ch.ru_minflt)), attrs); | |
3378 | attrs = Fcons (Fcons (Qcmajflt, make_number (proc.ki_rusage_ch.ru_majflt)), attrs); | |
3379 | ||
db7b8d06 PE |
3380 | attrs = Fcons (Fcons (Qutime, make_lisp_timeval (proc.ki_rusage.ru_utime)), |
3381 | attrs); | |
3382 | attrs = Fcons (Fcons (Qstime, make_lisp_timeval (proc.ki_rusage.ru_stime)), | |
3383 | attrs); | |
43aac990 PE |
3384 | t = timespec_add (timeval_to_timespec (proc.ki_rusage.ru_utime), |
3385 | timeval_to_timespec (proc.ki_rusage.ru_stime)); | |
db7b8d06 | 3386 | attrs = Fcons (Fcons (Qtime, make_lisp_time (t)), attrs); |
b91b7e4d | 3387 | |
db7b8d06 PE |
3388 | attrs = Fcons (Fcons (Qcutime, |
3389 | make_lisp_timeval (proc.ki_rusage_ch.ru_utime)), | |
3390 | attrs); | |
3391 | attrs = Fcons (Fcons (Qcstime, | |
3392 | make_lisp_timeval (proc.ki_rusage_ch.ru_utime)), | |
3393 | attrs); | |
43aac990 PE |
3394 | t = timespec_add (timeval_to_timespec (proc.ki_rusage_ch.ru_utime), |
3395 | timeval_to_timespec (proc.ki_rusage_ch.ru_stime)); | |
db7b8d06 | 3396 | attrs = Fcons (Fcons (Qctime, make_lisp_time (t)), attrs); |
b91b7e4d | 3397 | |
5790543d PE |
3398 | attrs = Fcons (Fcons (Qthcount, make_fixnum_or_float (proc.ki_numthreads)), |
3399 | attrs); | |
b91b7e4d EW |
3400 | attrs = Fcons (Fcons (Qpri, make_number (proc.ki_pri.pri_native)), attrs); |
3401 | attrs = Fcons (Fcons (Qnice, make_number (proc.ki_nice)), attrs); | |
db7b8d06 | 3402 | attrs = Fcons (Fcons (Qstart, make_lisp_timeval (proc.ki_start)), attrs); |
b91b7e4d | 3403 | attrs = Fcons (Fcons (Qvsize, make_number (proc.ki_size >> 10)), attrs); |
5790543d PE |
3404 | attrs = Fcons (Fcons (Qrss, make_number (proc.ki_rssize * pagesize >> 10)), |
3405 | attrs); | |
b91b7e4d | 3406 | |
43aac990 PE |
3407 | now = current_timespec (); |
3408 | t = timespec_sub (now, timeval_to_timespec (proc.ki_start)); | |
db7b8d06 | 3409 | attrs = Fcons (Fcons (Qetime, make_lisp_time (t)), attrs); |
b91b7e4d | 3410 | |
5790543d | 3411 | len = sizeof fscale; |
b91b7e4d EW |
3412 | if (sysctlbyname ("kern.fscale", &fscale, &len, NULL, 0) == 0) |
3413 | { | |
5790543d | 3414 | double pcpu; |
b91b7e4d | 3415 | fixpt_t ccpu; |
5790543d | 3416 | len = sizeof ccpu; |
b91b7e4d EW |
3417 | if (sysctlbyname ("kern.ccpu", &ccpu, &len, NULL, 0) == 0) |
3418 | { | |
5790543d PE |
3419 | pcpu = (100.0 * proc.ki_pctcpu / fscale |
3420 | / (1 - exp (proc.ki_swtime * log ((double) ccpu / fscale)))); | |
3421 | attrs = Fcons (Fcons (Qpcpu, make_fixnum_or_float (pcpu)), attrs); | |
b91b7e4d EW |
3422 | } |
3423 | } | |
3424 | ||
5790543d | 3425 | len = sizeof npages; |
b91b7e4d EW |
3426 | if (sysctlbyname ("hw.availpages", &npages, &len, NULL, 0) == 0) |
3427 | { | |
5790543d PE |
3428 | double pmem = (proc.ki_flag & P_INMEM |
3429 | ? 100.0 * proc.ki_rssize / npages | |
3430 | : 0); | |
3431 | attrs = Fcons (Fcons (Qpmem, make_fixnum_or_float (pmem)), attrs); | |
b91b7e4d EW |
3432 | } |
3433 | ||
3434 | mib[2] = KERN_PROC_ARGS; | |
3435 | len = MAXPATHLEN; | |
3436 | if (sysctl (mib, 4, args, &len, NULL, 0) == 0) | |
3437 | { | |
3438 | int i; | |
3439 | for (i = 0; i < len; i++) | |
3440 | { | |
3441 | if (! args[i] && i < len - 1) | |
3442 | args[i] = ' '; | |
3443 | } | |
3444 | ||
5790543d PE |
3445 | decoded_comm = |
3446 | (code_convert_string_norecord | |
d7ea76b4 | 3447 | (build_unibyte_string (args), |
5790543d | 3448 | Vlocale_coding_system, 0)); |
b91b7e4d EW |
3449 | |
3450 | attrs = Fcons (Fcons (Qargs, decoded_comm), attrs); | |
3451 | } | |
5790543d | 3452 | |
b91b7e4d EW |
3453 | UNGCPRO; |
3454 | return attrs; | |
3455 | } | |
3456 | ||
f8d23104 DN |
3457 | /* The WINDOWSNT implementation is in w32.c. |
3458 | The MSDOS implementation is in dosfns.c. */ | |
c4605e09 | 3459 | #elif !defined (WINDOWSNT) && !defined (MSDOS) |
06e111a6 DN |
3460 | |
3461 | Lisp_Object | |
3462 | system_process_attributes (Lisp_Object pid) | |
3463 | { | |
9dcbe89b | 3464 | return Qnil; |
06e111a6 DN |
3465 | } |
3466 | ||
3467 | #endif /* !defined (WINDOWSNT) */ |