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d0d6b7c5 | 1 | /* Asynchronous subprocess control for GNU Emacs. |
03832893 RS |
2 | Copyright (C) 1985, 86, 87, 88, 93, 94, 95, 1996 |
3 | Free Software Foundation, Inc. | |
d0d6b7c5 JB |
4 | |
5 | This file is part of GNU Emacs. | |
6 | ||
7 | GNU Emacs is free software; you can redistribute it and/or modify | |
8 | it under the terms of the GNU General Public License as published by | |
1dc77cc3 | 9 | the Free Software Foundation; either version 2, or (at your option) |
d0d6b7c5 JB |
10 | any later version. |
11 | ||
12 | GNU Emacs is distributed in the hope that it will be useful, | |
13 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
15 | GNU General Public License for more details. | |
16 | ||
17 | You should have received a copy of the GNU General Public License | |
18 | along with GNU Emacs; see the file COPYING. If not, write to | |
3b7ad313 EN |
19 | the Free Software Foundation, Inc., 59 Temple Place - Suite 330, |
20 | Boston, MA 02111-1307, USA. */ | |
d0d6b7c5 JB |
21 | |
22 | ||
23 | #include <signal.h> | |
24 | ||
18160b98 | 25 | #include <config.h> |
d0d6b7c5 | 26 | |
6720a7fb JB |
27 | /* This file is split into two parts by the following preprocessor |
28 | conditional. The 'then' clause contains all of the support for | |
29 | asynchronous subprocesses. The 'else' clause contains stub | |
30 | versions of some of the asynchronous subprocess routines that are | |
31 | often called elsewhere in Emacs, so we don't have to #ifdef the | |
32 | sections that call them. */ | |
33 | ||
34 | \f | |
d0d6b7c5 | 35 | #ifdef subprocesses |
d0d6b7c5 JB |
36 | |
37 | #include <stdio.h> | |
38 | #include <errno.h> | |
39 | #include <setjmp.h> | |
40 | #include <sys/types.h> /* some typedefs are used in sys/file.h */ | |
41 | #include <sys/file.h> | |
42 | #include <sys/stat.h> | |
93b4f699 RS |
43 | #ifdef HAVE_UNISTD_H |
44 | #include <unistd.h> | |
45 | #endif | |
d0d6b7c5 | 46 | |
e98d950b RS |
47 | #ifdef WINDOWSNT |
48 | #include <stdlib.h> | |
49 | #include <fcntl.h> | |
50 | #endif /* not WINDOWSNT */ | |
51 | ||
d0d6b7c5 JB |
52 | #ifdef HAVE_SOCKETS /* TCP connection support, if kernel can do it */ |
53 | #include <sys/socket.h> | |
54 | #include <netdb.h> | |
55 | #include <netinet/in.h> | |
56 | #include <arpa/inet.h> | |
f2cfa9a6 RS |
57 | #ifdef NEED_NET_ERRNO_H |
58 | #include <net/errno.h> | |
59 | #endif /* NEED_NET_ERRNO_H */ | |
d0d6b7c5 JB |
60 | #endif /* HAVE_SOCKETS */ |
61 | ||
1d2c16fa RS |
62 | /* TERM is a poor-man's SLIP, used on Linux. */ |
63 | #ifdef TERM | |
64 | #include <client.h> | |
65 | #endif | |
66 | ||
cf32fea0 PR |
67 | /* On some systems, e.g. DGUX, inet_addr returns a 'struct in_addr'. */ |
68 | #ifdef HAVE_BROKEN_INET_ADDR | |
79967d5e RS |
69 | #define IN_ADDR struct in_addr |
70 | #define NUMERIC_ADDR_ERROR (numeric_addr.s_addr == -1) | |
71 | #else | |
72 | #define IN_ADDR unsigned long | |
73 | #define NUMERIC_ADDR_ERROR (numeric_addr == -1) | |
74 | #endif | |
75 | ||
d0d6b7c5 JB |
76 | #if defined(BSD) || defined(STRIDE) |
77 | #include <sys/ioctl.h> | |
0ad77c54 | 78 | #if !defined (O_NDELAY) && defined (HAVE_PTYS) && !defined(USG5) |
d0d6b7c5 JB |
79 | #include <fcntl.h> |
80 | #endif /* HAVE_PTYS and no O_NDELAY */ | |
81 | #endif /* BSD or STRIDE */ | |
d0d6b7c5 | 82 | |
99e3d726 RS |
83 | #ifdef BROKEN_O_NONBLOCK |
84 | #undef O_NONBLOCK | |
85 | #endif /* BROKEN_O_NONBLOCK */ | |
86 | ||
d0d6b7c5 JB |
87 | #ifdef NEED_BSDTTY |
88 | #include <bsdtty.h> | |
89 | #endif | |
90 | ||
d0d6b7c5 JB |
91 | #ifdef IRIS |
92 | #include <sys/sysmacros.h> /* for "minor" */ | |
93 | #endif /* not IRIS */ | |
94 | ||
95 | #include "systime.h" | |
36ebaafa | 96 | #include "systty.h" |
d0d6b7c5 JB |
97 | |
98 | #include "lisp.h" | |
99 | #include "window.h" | |
100 | #include "buffer.h" | |
101 | #include "process.h" | |
102 | #include "termhooks.h" | |
103 | #include "termopts.h" | |
104 | #include "commands.h" | |
1dc77cc3 | 105 | #include "frame.h" |
d0d6b7c5 | 106 | |
dd2281ae | 107 | Lisp_Object Qprocessp; |
d0d6b7c5 | 108 | Lisp_Object Qrun, Qstop, Qsignal, Qopen, Qclosed; |
6545aada | 109 | Lisp_Object Qlast_nonmenu_event; |
d0d6b7c5 JB |
110 | /* Qexit is declared and initialized in eval.c. */ |
111 | ||
112 | /* a process object is a network connection when its childp field is neither | |
113 | Qt nor Qnil but is instead a string (name of foreign host we | |
114 | are connected to + name of port we are connected to) */ | |
115 | ||
116 | #ifdef HAVE_SOCKETS | |
117 | static Lisp_Object stream_process; | |
118 | ||
b5b502d6 | 119 | #define NETCONN_P(p) (GC_STRINGP (XPROCESS (p)->childp)) |
d0d6b7c5 JB |
120 | #else |
121 | #define NETCONN_P(p) 0 | |
122 | #endif /* HAVE_SOCKETS */ | |
123 | ||
124 | /* Define first descriptor number available for subprocesses. */ | |
125 | #ifdef VMS | |
126 | #define FIRST_PROC_DESC 1 | |
127 | #else /* Not VMS */ | |
128 | #define FIRST_PROC_DESC 3 | |
129 | #endif | |
130 | ||
131 | /* Define SIGCHLD as an alias for SIGCLD. There are many conditionals | |
132 | testing SIGCHLD. */ | |
133 | ||
134 | #if !defined (SIGCHLD) && defined (SIGCLD) | |
135 | #define SIGCHLD SIGCLD | |
136 | #endif /* SIGCLD */ | |
137 | ||
138 | #include "syssignal.h" | |
139 | ||
889255b4 | 140 | #include "syswait.h" |
d0d6b7c5 | 141 | |
b062d1fe RM |
142 | extern int errno; |
143 | extern char *strerror (); | |
144 | #ifdef VMS | |
d0d6b7c5 | 145 | extern char *sys_errlist[]; |
b062d1fe | 146 | #endif |
d0d6b7c5 | 147 | |
5f0929a7 RS |
148 | #ifndef HAVE_H_ERRNO |
149 | extern int h_errno; | |
150 | #endif | |
151 | ||
a86928f7 | 152 | #ifndef SYS_SIGLIST_DECLARED |
d0d6b7c5 JB |
153 | #ifndef VMS |
154 | #ifndef BSD4_1 | |
e98d950b | 155 | #ifndef WINDOWSNT |
084fd64a | 156 | #ifndef LINUX |
d0d6b7c5 | 157 | extern char *sys_siglist[]; |
a0e4d3f3 RS |
158 | #endif /* not LINUX */ |
159 | #else /* BSD4_1 */ | |
d0d6b7c5 JB |
160 | char *sys_siglist[] = |
161 | { | |
162 | "bum signal!!", | |
163 | "hangup", | |
164 | "interrupt", | |
165 | "quit", | |
166 | "illegal instruction", | |
167 | "trace trap", | |
168 | "iot instruction", | |
169 | "emt instruction", | |
170 | "floating point exception", | |
171 | "kill", | |
172 | "bus error", | |
173 | "segmentation violation", | |
174 | "bad argument to system call", | |
175 | "write on a pipe with no one to read it", | |
176 | "alarm clock", | |
177 | "software termination signal from kill", | |
178 | "status signal", | |
179 | "sendable stop signal not from tty", | |
180 | "stop signal from tty", | |
181 | "continue a stopped process", | |
182 | "child status has changed", | |
183 | "background read attempted from control tty", | |
184 | "background write attempted from control tty", | |
185 | "input record available at control tty", | |
186 | "exceeded CPU time limit", | |
187 | "exceeded file size limit" | |
188 | }; | |
e98d950b | 189 | #endif /* not WINDOWSNT */ |
d0d6b7c5 JB |
190 | #endif |
191 | #endif /* VMS */ | |
a86928f7 | 192 | #endif /* ! SYS_SIGLIST_DECLARED */ |
d0d6b7c5 | 193 | |
d0d6b7c5 JB |
194 | /* t means use pty, nil means use a pipe, |
195 | maybe other values to come. */ | |
dd2281ae | 196 | static Lisp_Object Vprocess_connection_type; |
d0d6b7c5 JB |
197 | |
198 | #ifdef SKTPAIR | |
199 | #ifndef HAVE_SOCKETS | |
200 | #include <sys/socket.h> | |
201 | #endif | |
202 | #endif /* SKTPAIR */ | |
203 | ||
17d02632 KH |
204 | /* These next two vars are non-static since sysdep.c uses them in the |
205 | emulation of `select'. */ | |
d0d6b7c5 | 206 | /* Number of events of change of status of a process. */ |
17d02632 | 207 | int process_tick; |
d0d6b7c5 | 208 | /* Number of events for which the user or sentinel has been notified. */ |
17d02632 | 209 | int update_tick; |
d0d6b7c5 | 210 | |
5886acf9 | 211 | #include "sysselect.h" |
d0d6b7c5 | 212 | |
583dcae4 | 213 | /* If we support a window system, turn on the code to poll periodically |
44ade2e9 | 214 | to detect C-g. It isn't actually used when doing interrupt input. */ |
583dcae4 | 215 | #ifdef HAVE_WINDOW_SYSTEM |
44ade2e9 RS |
216 | #define POLL_FOR_INPUT |
217 | #endif | |
218 | ||
a69281ff | 219 | /* Mask of bits indicating the descriptors that we wait for input on. */ |
d0d6b7c5 | 220 | |
dd2281ae RS |
221 | static SELECT_TYPE input_wait_mask; |
222 | ||
a69281ff RS |
223 | /* Mask that excludes keyboard input descriptor (s). */ |
224 | ||
225 | static SELECT_TYPE non_keyboard_wait_mask; | |
226 | ||
7d0e672e RS |
227 | /* The largest descriptor currently in use for a process object. */ |
228 | static int max_process_desc; | |
229 | ||
a69281ff RS |
230 | /* The largest descriptor currently in use for keyboard input. */ |
231 | static int max_keyboard_desc; | |
d0d6b7c5 | 232 | |
dd2281ae RS |
233 | /* Nonzero means delete a process right away if it exits. */ |
234 | static int delete_exited_processes; | |
d0d6b7c5 JB |
235 | |
236 | /* Indexed by descriptor, gives the process (if any) for that descriptor */ | |
41f3aa98 | 237 | Lisp_Object chan_process[MAXDESC]; |
d0d6b7c5 JB |
238 | |
239 | /* Alist of elements (NAME . PROCESS) */ | |
41f3aa98 | 240 | Lisp_Object Vprocess_alist; |
d0d6b7c5 JB |
241 | |
242 | /* Buffered-ahead input char from process, indexed by channel. | |
243 | -1 means empty (no char is buffered). | |
244 | Used on sys V where the only way to tell if there is any | |
245 | output from the process is to read at least one char. | |
246 | Always -1 on systems that support FIONREAD. */ | |
247 | ||
e98d950b RS |
248 | /* Don't make static; need to access externally. */ |
249 | int proc_buffered_char[MAXDESC]; | |
dd2281ae RS |
250 | |
251 | static Lisp_Object get_process (); | |
93b4f699 | 252 | |
fb4c3627 | 253 | extern EMACS_TIME timer_check (); |
5de50bfb | 254 | extern int timers_run; |
fb4c3627 | 255 | |
93b4f699 RS |
256 | /* Maximum number of bytes to send to a pty without an eof. */ |
257 | static int pty_max_bytes; | |
3b9a3dfa | 258 | |
875e6b94 KH |
259 | #ifdef HAVE_PTYS |
260 | /* The file name of the pty opened by allocate_pty. */ | |
3b9a3dfa RS |
261 | |
262 | static char pty_name[24]; | |
875e6b94 | 263 | #endif |
d0d6b7c5 JB |
264 | \f |
265 | /* Compute the Lisp form of the process status, p->status, from | |
266 | the numeric status that was returned by `wait'. */ | |
267 | ||
f9738840 JB |
268 | Lisp_Object status_convert (); |
269 | ||
d0d6b7c5 JB |
270 | update_status (p) |
271 | struct Lisp_Process *p; | |
272 | { | |
273 | union { int i; WAITTYPE wt; } u; | |
274 | u.i = XFASTINT (p->raw_status_low) + (XFASTINT (p->raw_status_high) << 16); | |
275 | p->status = status_convert (u.wt); | |
276 | p->raw_status_low = Qnil; | |
277 | p->raw_status_high = Qnil; | |
278 | } | |
279 | ||
91d10fa8 | 280 | /* Convert a process status word in Unix format to |
d0d6b7c5 JB |
281 | the list that we use internally. */ |
282 | ||
283 | Lisp_Object | |
284 | status_convert (w) | |
285 | WAITTYPE w; | |
286 | { | |
287 | if (WIFSTOPPED (w)) | |
288 | return Fcons (Qstop, Fcons (make_number (WSTOPSIG (w)), Qnil)); | |
289 | else if (WIFEXITED (w)) | |
290 | return Fcons (Qexit, Fcons (make_number (WRETCODE (w)), | |
291 | WCOREDUMP (w) ? Qt : Qnil)); | |
292 | else if (WIFSIGNALED (w)) | |
293 | return Fcons (Qsignal, Fcons (make_number (WTERMSIG (w)), | |
294 | WCOREDUMP (w) ? Qt : Qnil)); | |
295 | else | |
296 | return Qrun; | |
297 | } | |
298 | ||
299 | /* Given a status-list, extract the three pieces of information | |
300 | and store them individually through the three pointers. */ | |
301 | ||
302 | void | |
303 | decode_status (l, symbol, code, coredump) | |
304 | Lisp_Object l; | |
305 | Lisp_Object *symbol; | |
306 | int *code; | |
307 | int *coredump; | |
308 | { | |
309 | Lisp_Object tem; | |
310 | ||
bcd69aea | 311 | if (SYMBOLP (l)) |
d0d6b7c5 JB |
312 | { |
313 | *symbol = l; | |
314 | *code = 0; | |
315 | *coredump = 0; | |
316 | } | |
317 | else | |
318 | { | |
319 | *symbol = XCONS (l)->car; | |
320 | tem = XCONS (l)->cdr; | |
321 | *code = XFASTINT (XCONS (tem)->car); | |
f9738840 | 322 | tem = XCONS (tem)->cdr; |
d0d6b7c5 JB |
323 | *coredump = !NILP (tem); |
324 | } | |
325 | } | |
326 | ||
327 | /* Return a string describing a process status list. */ | |
328 | ||
329 | Lisp_Object | |
330 | status_message (status) | |
331 | Lisp_Object status; | |
332 | { | |
333 | Lisp_Object symbol; | |
334 | int code, coredump; | |
335 | Lisp_Object string, string2; | |
336 | ||
337 | decode_status (status, &symbol, &code, &coredump); | |
338 | ||
339 | if (EQ (symbol, Qsignal) || EQ (symbol, Qstop)) | |
340 | { | |
b97ad9ea RS |
341 | char *signame = 0; |
342 | if (code < NSIG) | |
343 | { | |
b0310da4 | 344 | #ifndef VMS |
ed0cae05 RS |
345 | /* Cast to suppress warning if the table has const char *. */ |
346 | signame = (char *) sys_siglist[code]; | |
b0310da4 | 347 | #else |
b97ad9ea | 348 | signame = sys_errlist[code]; |
b0310da4 | 349 | #endif |
b97ad9ea RS |
350 | } |
351 | if (signame == 0) | |
352 | signame = "unknown"; | |
353 | string = build_string (signame); | |
d0d6b7c5 JB |
354 | string2 = build_string (coredump ? " (core dumped)\n" : "\n"); |
355 | XSTRING (string)->data[0] = DOWNCASE (XSTRING (string)->data[0]); | |
356 | return concat2 (string, string2); | |
357 | } | |
358 | else if (EQ (symbol, Qexit)) | |
359 | { | |
360 | if (code == 0) | |
361 | return build_string ("finished\n"); | |
f2980264 | 362 | string = Fnumber_to_string (make_number (code)); |
d0d6b7c5 JB |
363 | string2 = build_string (coredump ? " (core dumped)\n" : "\n"); |
364 | return concat2 (build_string ("exited abnormally with code "), | |
365 | concat2 (string, string2)); | |
366 | } | |
367 | else | |
368 | return Fcopy_sequence (Fsymbol_name (symbol)); | |
369 | } | |
370 | \f | |
371 | #ifdef HAVE_PTYS | |
d0d6b7c5 | 372 | |
875e6b94 KH |
373 | /* Open an available pty, returning a file descriptor. |
374 | Return -1 on failure. | |
375 | The file name of the terminal corresponding to the pty | |
376 | is left in the variable pty_name. */ | |
377 | ||
d0d6b7c5 JB |
378 | int |
379 | allocate_pty () | |
380 | { | |
381 | struct stat stb; | |
382 | register c, i; | |
383 | int fd; | |
384 | ||
32676c08 JB |
385 | /* Some systems name their pseudoterminals so that there are gaps in |
386 | the usual sequence - for example, on HP9000/S700 systems, there | |
387 | are no pseudoterminals with names ending in 'f'. So we wait for | |
388 | three failures in a row before deciding that we've reached the | |
389 | end of the ptys. */ | |
390 | int failed_count = 0; | |
391 | ||
d0d6b7c5 JB |
392 | #ifdef PTY_ITERATION |
393 | PTY_ITERATION | |
394 | #else | |
395 | for (c = FIRST_PTY_LETTER; c <= 'z'; c++) | |
396 | for (i = 0; i < 16; i++) | |
397 | #endif | |
398 | { | |
399 | #ifdef PTY_NAME_SPRINTF | |
400 | PTY_NAME_SPRINTF | |
d0d6b7c5 JB |
401 | #else |
402 | sprintf (pty_name, "/dev/pty%c%x", c, i); | |
d0d6b7c5 JB |
403 | #endif /* no PTY_NAME_SPRINTF */ |
404 | ||
4d7c105e RS |
405 | #ifdef PTY_OPEN |
406 | PTY_OPEN; | |
407 | #else /* no PTY_OPEN */ | |
32676c08 JB |
408 | #ifdef IRIS |
409 | /* Unusual IRIS code */ | |
410 | *ptyv = open ("/dev/ptc", O_RDWR | O_NDELAY, 0); | |
411 | if (fd < 0) | |
412 | return -1; | |
413 | if (fstat (fd, &stb) < 0) | |
d0d6b7c5 | 414 | return -1; |
4d7c105e | 415 | #else /* not IRIS */ |
32676c08 JB |
416 | if (stat (pty_name, &stb) < 0) |
417 | { | |
418 | failed_count++; | |
419 | if (failed_count >= 3) | |
420 | return -1; | |
421 | } | |
422 | else | |
423 | failed_count = 0; | |
d0d6b7c5 JB |
424 | #ifdef O_NONBLOCK |
425 | fd = open (pty_name, O_RDWR | O_NONBLOCK, 0); | |
426 | #else | |
427 | fd = open (pty_name, O_RDWR | O_NDELAY, 0); | |
428 | #endif | |
4d7c105e RS |
429 | #endif /* not IRIS */ |
430 | #endif /* no PTY_OPEN */ | |
d0d6b7c5 JB |
431 | |
432 | if (fd >= 0) | |
433 | { | |
434 | /* check to make certain that both sides are available | |
435 | this avoids a nasty yet stupid bug in rlogins */ | |
436 | #ifdef PTY_TTY_NAME_SPRINTF | |
437 | PTY_TTY_NAME_SPRINTF | |
d0d6b7c5 JB |
438 | #else |
439 | sprintf (pty_name, "/dev/tty%c%x", c, i); | |
d0d6b7c5 JB |
440 | #endif /* no PTY_TTY_NAME_SPRINTF */ |
441 | #ifndef UNIPLUS | |
442 | if (access (pty_name, 6) != 0) | |
443 | { | |
444 | close (fd); | |
fad97cbe | 445 | #if !defined(IRIS) && !defined(__sgi) |
d0d6b7c5 JB |
446 | continue; |
447 | #else | |
448 | return -1; | |
449 | #endif /* IRIS */ | |
450 | } | |
451 | #endif /* not UNIPLUS */ | |
452 | setup_pty (fd); | |
453 | return fd; | |
454 | } | |
455 | } | |
456 | return -1; | |
457 | } | |
458 | #endif /* HAVE_PTYS */ | |
459 | \f | |
460 | Lisp_Object | |
461 | make_process (name) | |
462 | Lisp_Object name; | |
463 | { | |
23d6bb9c | 464 | struct Lisp_Vector *vec; |
d0d6b7c5 JB |
465 | register Lisp_Object val, tem, name1; |
466 | register struct Lisp_Process *p; | |
467 | char suffix[10]; | |
468 | register int i; | |
469 | ||
23d6bb9c KH |
470 | vec = allocate_vectorlike ((EMACS_INT) VECSIZE (struct Lisp_Process)); |
471 | for (i = 0; i < VECSIZE (struct Lisp_Process); i++) | |
472 | vec->contents[i] = Qnil; | |
473 | vec->size = VECSIZE (struct Lisp_Process); | |
474 | p = (struct Lisp_Process *)vec; | |
475 | ||
1d056e64 KH |
476 | XSETINT (p->infd, -1); |
477 | XSETINT (p->outfd, -1); | |
22719df2 KH |
478 | XSETFASTINT (p->pid, 0); |
479 | XSETFASTINT (p->tick, 0); | |
480 | XSETFASTINT (p->update_tick, 0); | |
d0d6b7c5 JB |
481 | p->raw_status_low = Qnil; |
482 | p->raw_status_high = Qnil; | |
483 | p->status = Qrun; | |
484 | p->mark = Fmake_marker (); | |
485 | ||
486 | /* If name is already in use, modify it until it is unused. */ | |
487 | ||
488 | name1 = name; | |
489 | for (i = 1; ; i++) | |
490 | { | |
491 | tem = Fget_process (name1); | |
492 | if (NILP (tem)) break; | |
493 | sprintf (suffix, "<%d>", i); | |
494 | name1 = concat2 (name, build_string (suffix)); | |
495 | } | |
496 | name = name1; | |
497 | p->name = name; | |
23d6bb9c | 498 | XSETPROCESS (val, p); |
d0d6b7c5 JB |
499 | Vprocess_alist = Fcons (Fcons (name, val), Vprocess_alist); |
500 | return val; | |
501 | } | |
502 | ||
503 | remove_process (proc) | |
504 | register Lisp_Object proc; | |
505 | { | |
506 | register Lisp_Object pair; | |
507 | ||
508 | pair = Frassq (proc, Vprocess_alist); | |
509 | Vprocess_alist = Fdelq (pair, Vprocess_alist); | |
d0d6b7c5 JB |
510 | |
511 | deactivate_process (proc); | |
512 | } | |
513 | \f | |
514 | DEFUN ("processp", Fprocessp, Sprocessp, 1, 1, 0, | |
515 | "Return t if OBJECT is a process.") | |
4ee3e309 EN |
516 | (object) |
517 | Lisp_Object object; | |
d0d6b7c5 | 518 | { |
4ee3e309 | 519 | return PROCESSP (object) ? Qt : Qnil; |
d0d6b7c5 JB |
520 | } |
521 | ||
522 | DEFUN ("get-process", Fget_process, Sget_process, 1, 1, 0, | |
523 | "Return the process named NAME, or nil if there is none.") | |
524 | (name) | |
525 | register Lisp_Object name; | |
526 | { | |
bcd69aea | 527 | if (PROCESSP (name)) |
d0d6b7c5 JB |
528 | return name; |
529 | CHECK_STRING (name, 0); | |
530 | return Fcdr (Fassoc (name, Vprocess_alist)); | |
531 | } | |
532 | ||
533 | DEFUN ("get-buffer-process", Fget_buffer_process, Sget_buffer_process, 1, 1, 0, | |
534 | "Return the (or, a) process associated with BUFFER.\n\ | |
535 | BUFFER may be a buffer or the name of one.") | |
4ee3e309 EN |
536 | (buffer) |
537 | register Lisp_Object buffer; | |
d0d6b7c5 JB |
538 | { |
539 | register Lisp_Object buf, tail, proc; | |
540 | ||
4ee3e309 EN |
541 | if (NILP (buffer)) return Qnil; |
542 | buf = Fget_buffer (buffer); | |
d0d6b7c5 JB |
543 | if (NILP (buf)) return Qnil; |
544 | ||
545 | for (tail = Vprocess_alist; !NILP (tail); tail = Fcdr (tail)) | |
546 | { | |
547 | proc = Fcdr (Fcar (tail)); | |
bcd69aea | 548 | if (PROCESSP (proc) && EQ (XPROCESS (proc)->buffer, buf)) |
d0d6b7c5 JB |
549 | return proc; |
550 | } | |
551 | return Qnil; | |
552 | } | |
553 | ||
ebb9e16f JB |
554 | /* This is how commands for the user decode process arguments. It |
555 | accepts a process, a process name, a buffer, a buffer name, or nil. | |
556 | Buffers denote the first process in the buffer, and nil denotes the | |
557 | current buffer. */ | |
d0d6b7c5 | 558 | |
77b221b1 | 559 | static Lisp_Object |
d0d6b7c5 JB |
560 | get_process (name) |
561 | register Lisp_Object name; | |
562 | { | |
1619761d KH |
563 | register Lisp_Object proc, obj; |
564 | if (STRINGP (name)) | |
565 | { | |
566 | obj = Fget_process (name); | |
567 | if (NILP (obj)) | |
568 | obj = Fget_buffer (name); | |
569 | if (NILP (obj)) | |
570 | error ("Process %s does not exist", XSTRING (name)->data); | |
571 | } | |
572 | else if (NILP (name)) | |
573 | obj = Fcurrent_buffer (); | |
d0d6b7c5 | 574 | else |
1619761d KH |
575 | obj = name; |
576 | ||
577 | /* Now obj should be either a buffer object or a process object. | |
578 | */ | |
579 | if (BUFFERP (obj)) | |
d0d6b7c5 | 580 | { |
1619761d | 581 | proc = Fget_buffer_process (obj); |
d0d6b7c5 | 582 | if (NILP (proc)) |
1619761d | 583 | error ("Buffer %s has no process", XSTRING (XBUFFER (obj)->name)->data); |
d0d6b7c5 | 584 | } |
d0d6b7c5 | 585 | else |
1619761d KH |
586 | { |
587 | CHECK_PROCESS (obj, 0); | |
588 | proc = obj; | |
589 | } | |
590 | return proc; | |
d0d6b7c5 JB |
591 | } |
592 | ||
593 | DEFUN ("delete-process", Fdelete_process, Sdelete_process, 1, 1, 0, | |
594 | "Delete PROCESS: kill it and forget about it immediately.\n\ | |
ebb9e16f JB |
595 | PROCESS may be a process, a buffer, the name of a process or buffer, or\n\ |
596 | nil, indicating the current buffer's process.") | |
4ee3e309 EN |
597 | (process) |
598 | register Lisp_Object process; | |
d0d6b7c5 | 599 | { |
4ee3e309 EN |
600 | process = get_process (process); |
601 | XPROCESS (process)->raw_status_low = Qnil; | |
602 | XPROCESS (process)->raw_status_high = Qnil; | |
603 | if (NETCONN_P (process)) | |
d0d6b7c5 | 604 | { |
4ee3e309 EN |
605 | XPROCESS (process)->status = Fcons (Qexit, Fcons (make_number (0), Qnil)); |
606 | XSETINT (XPROCESS (process)->tick, ++process_tick); | |
d0d6b7c5 | 607 | } |
4ee3e309 | 608 | else if (XINT (XPROCESS (process)->infd) >= 0) |
d0d6b7c5 | 609 | { |
4ee3e309 | 610 | Fkill_process (process, Qnil); |
d0d6b7c5 | 611 | /* Do this now, since remove_process will make sigchld_handler do nothing. */ |
4ee3e309 | 612 | XPROCESS (process)->status |
d0d6b7c5 | 613 | = Fcons (Qsignal, Fcons (make_number (SIGKILL), Qnil)); |
4ee3e309 | 614 | XSETINT (XPROCESS (process)->tick, ++process_tick); |
d0d6b7c5 JB |
615 | status_notify (); |
616 | } | |
4ee3e309 | 617 | remove_process (process); |
d0d6b7c5 JB |
618 | return Qnil; |
619 | } | |
620 | \f | |
621 | DEFUN ("process-status", Fprocess_status, Sprocess_status, 1, 1, 0, | |
622 | "Return the status of PROCESS: a symbol, one of these:\n\ | |
623 | run -- for a process that is running.\n\ | |
624 | stop -- for a process stopped but continuable.\n\ | |
625 | exit -- for a process that has exited.\n\ | |
626 | signal -- for a process that has got a fatal signal.\n\ | |
627 | open -- for a network stream connection that is open.\n\ | |
628 | closed -- for a network stream connection that is closed.\n\ | |
ebb9e16f JB |
629 | nil -- if arg is a process name and no such process exists.\n\ |
630 | PROCESS may be a process, a buffer, the name of a process or buffer, or\n\ | |
631 | nil, indicating the current buffer's process.") | |
4ee3e309 EN |
632 | (process) |
633 | register Lisp_Object process; | |
d0d6b7c5 JB |
634 | { |
635 | register struct Lisp_Process *p; | |
636 | register Lisp_Object status; | |
343f4114 | 637 | |
4ee3e309 EN |
638 | if (STRINGP (process)) |
639 | process = Fget_process (process); | |
343f4114 | 640 | else |
4ee3e309 | 641 | process = get_process (process); |
343f4114 | 642 | |
4ee3e309 EN |
643 | if (NILP (process)) |
644 | return process; | |
343f4114 | 645 | |
4ee3e309 | 646 | p = XPROCESS (process); |
d0d6b7c5 JB |
647 | if (!NILP (p->raw_status_low)) |
648 | update_status (p); | |
649 | status = p->status; | |
bcd69aea | 650 | if (CONSP (status)) |
d0d6b7c5 | 651 | status = XCONS (status)->car; |
4ee3e309 | 652 | if (NETCONN_P (process)) |
d0d6b7c5 JB |
653 | { |
654 | if (EQ (status, Qrun)) | |
655 | status = Qopen; | |
656 | else if (EQ (status, Qexit)) | |
657 | status = Qclosed; | |
658 | } | |
659 | return status; | |
660 | } | |
661 | ||
662 | DEFUN ("process-exit-status", Fprocess_exit_status, Sprocess_exit_status, | |
663 | 1, 1, 0, | |
664 | "Return the exit status of PROCESS or the signal number that killed it.\n\ | |
665 | If PROCESS has not yet exited or died, return 0.") | |
4ee3e309 EN |
666 | (process) |
667 | register Lisp_Object process; | |
d0d6b7c5 | 668 | { |
4ee3e309 EN |
669 | CHECK_PROCESS (process, 0); |
670 | if (!NILP (XPROCESS (process)->raw_status_low)) | |
671 | update_status (XPROCESS (process)); | |
672 | if (CONSP (XPROCESS (process)->status)) | |
673 | return XCONS (XCONS (XPROCESS (process)->status)->cdr)->car; | |
d0d6b7c5 JB |
674 | return make_number (0); |
675 | } | |
676 | ||
677 | DEFUN ("process-id", Fprocess_id, Sprocess_id, 1, 1, 0, | |
678 | "Return the process id of PROCESS.\n\ | |
679 | This is the pid of the Unix process which PROCESS uses or talks to.\n\ | |
680 | For a network connection, this value is nil.") | |
4ee3e309 EN |
681 | (process) |
682 | register Lisp_Object process; | |
d0d6b7c5 | 683 | { |
4ee3e309 EN |
684 | CHECK_PROCESS (process, 0); |
685 | return XPROCESS (process)->pid; | |
d0d6b7c5 JB |
686 | } |
687 | ||
688 | DEFUN ("process-name", Fprocess_name, Sprocess_name, 1, 1, 0, | |
689 | "Return the name of PROCESS, as a string.\n\ | |
690 | This is the name of the program invoked in PROCESS,\n\ | |
691 | possibly modified to make it unique among process names.") | |
4ee3e309 EN |
692 | (process) |
693 | register Lisp_Object process; | |
d0d6b7c5 | 694 | { |
4ee3e309 EN |
695 | CHECK_PROCESS (process, 0); |
696 | return XPROCESS (process)->name; | |
d0d6b7c5 JB |
697 | } |
698 | ||
699 | DEFUN ("process-command", Fprocess_command, Sprocess_command, 1, 1, 0, | |
700 | "Return the command that was executed to start PROCESS.\n\ | |
701 | This is a list of strings, the first string being the program executed\n\ | |
702 | and the rest of the strings being the arguments given to it.\n\ | |
703 | For a non-child channel, this is nil.") | |
4ee3e309 EN |
704 | (process) |
705 | register Lisp_Object process; | |
d0d6b7c5 | 706 | { |
4ee3e309 EN |
707 | CHECK_PROCESS (process, 0); |
708 | return XPROCESS (process)->command; | |
d0d6b7c5 JB |
709 | } |
710 | ||
3b9a3dfa RS |
711 | DEFUN ("process-tty-name", Fprocess_tty_name, Sprocess_tty_name, 1, 1, 0, |
712 | "Return the name of the terminal PROCESS uses, or nil if none.\n\ | |
713 | This is the terminal that the process itself reads and writes on,\n\ | |
714 | not the name of the pty that Emacs uses to talk with that terminal.") | |
4ee3e309 EN |
715 | (process) |
716 | register Lisp_Object process; | |
3b9a3dfa | 717 | { |
4ee3e309 EN |
718 | CHECK_PROCESS (process, 0); |
719 | return XPROCESS (process)->tty_name; | |
3b9a3dfa RS |
720 | } |
721 | ||
d0d6b7c5 JB |
722 | DEFUN ("set-process-buffer", Fset_process_buffer, Sset_process_buffer, |
723 | 2, 2, 0, | |
724 | "Set buffer associated with PROCESS to BUFFER (a buffer, or nil).") | |
4ee3e309 EN |
725 | (process, buffer) |
726 | register Lisp_Object process, buffer; | |
d0d6b7c5 | 727 | { |
4ee3e309 | 728 | CHECK_PROCESS (process, 0); |
d0d6b7c5 JB |
729 | if (!NILP (buffer)) |
730 | CHECK_BUFFER (buffer, 1); | |
4ee3e309 | 731 | XPROCESS (process)->buffer = buffer; |
d0d6b7c5 JB |
732 | return buffer; |
733 | } | |
734 | ||
735 | DEFUN ("process-buffer", Fprocess_buffer, Sprocess_buffer, | |
736 | 1, 1, 0, | |
737 | "Return the buffer PROCESS is associated with.\n\ | |
738 | Output from PROCESS is inserted in this buffer\n\ | |
739 | unless PROCESS has a filter.") | |
4ee3e309 EN |
740 | (process) |
741 | register Lisp_Object process; | |
d0d6b7c5 | 742 | { |
4ee3e309 EN |
743 | CHECK_PROCESS (process, 0); |
744 | return XPROCESS (process)->buffer; | |
d0d6b7c5 JB |
745 | } |
746 | ||
747 | DEFUN ("process-mark", Fprocess_mark, Sprocess_mark, | |
748 | 1, 1, 0, | |
749 | "Return the marker for the end of the last output from PROCESS.") | |
4ee3e309 EN |
750 | (process) |
751 | register Lisp_Object process; | |
d0d6b7c5 | 752 | { |
4ee3e309 EN |
753 | CHECK_PROCESS (process, 0); |
754 | return XPROCESS (process)->mark; | |
d0d6b7c5 JB |
755 | } |
756 | ||
757 | DEFUN ("set-process-filter", Fset_process_filter, Sset_process_filter, | |
758 | 2, 2, 0, | |
759 | "Give PROCESS the filter function FILTER; nil means no filter.\n\ | |
20ddfff7 | 760 | t means stop accepting output from the process.\n\ |
d0d6b7c5 JB |
761 | When a process has a filter, each time it does output\n\ |
762 | the entire string of output is passed to the filter.\n\ | |
763 | The filter gets two arguments: the process and the string of output.\n\ | |
764 | If the process has a filter, its buffer is not used for output.") | |
4ee3e309 EN |
765 | (process, filter) |
766 | register Lisp_Object process, filter; | |
d0d6b7c5 | 767 | { |
4ee3e309 | 768 | CHECK_PROCESS (process, 0); |
20ddfff7 | 769 | if (EQ (filter, Qt)) |
a69281ff | 770 | { |
4ee3e309 EN |
771 | FD_CLR (XINT (XPROCESS (process)->infd), &input_wait_mask); |
772 | FD_CLR (XINT (XPROCESS (process)->infd), &non_keyboard_wait_mask); | |
a69281ff | 773 | } |
4ee3e309 | 774 | else if (EQ (XPROCESS (process)->filter, Qt)) |
a69281ff | 775 | { |
4ee3e309 EN |
776 | FD_SET (XINT (XPROCESS (process)->infd), &input_wait_mask); |
777 | FD_SET (XINT (XPROCESS (process)->infd), &non_keyboard_wait_mask); | |
a69281ff | 778 | } |
4ee3e309 | 779 | XPROCESS (process)->filter = filter; |
d0d6b7c5 JB |
780 | return filter; |
781 | } | |
782 | ||
783 | DEFUN ("process-filter", Fprocess_filter, Sprocess_filter, | |
784 | 1, 1, 0, | |
785 | "Returns the filter function of PROCESS; nil if none.\n\ | |
786 | See `set-process-filter' for more info on filter functions.") | |
4ee3e309 EN |
787 | (process) |
788 | register Lisp_Object process; | |
d0d6b7c5 | 789 | { |
4ee3e309 EN |
790 | CHECK_PROCESS (process, 0); |
791 | return XPROCESS (process)->filter; | |
d0d6b7c5 JB |
792 | } |
793 | ||
794 | DEFUN ("set-process-sentinel", Fset_process_sentinel, Sset_process_sentinel, | |
795 | 2, 2, 0, | |
796 | "Give PROCESS the sentinel SENTINEL; nil for none.\n\ | |
797 | The sentinel is called as a function when the process changes state.\n\ | |
798 | It gets two arguments: the process, and a string describing the change.") | |
4ee3e309 EN |
799 | (process, sentinel) |
800 | register Lisp_Object process, sentinel; | |
d0d6b7c5 | 801 | { |
4ee3e309 EN |
802 | CHECK_PROCESS (process, 0); |
803 | XPROCESS (process)->sentinel = sentinel; | |
d0d6b7c5 JB |
804 | return sentinel; |
805 | } | |
806 | ||
807 | DEFUN ("process-sentinel", Fprocess_sentinel, Sprocess_sentinel, | |
808 | 1, 1, 0, | |
809 | "Return the sentinel of PROCESS; nil if none.\n\ | |
810 | See `set-process-sentinel' for more info on sentinels.") | |
4ee3e309 EN |
811 | (process) |
812 | register Lisp_Object process; | |
d0d6b7c5 | 813 | { |
4ee3e309 EN |
814 | CHECK_PROCESS (process, 0); |
815 | return XPROCESS (process)->sentinel; | |
d0d6b7c5 JB |
816 | } |
817 | ||
396df322 RS |
818 | DEFUN ("set-process-window-size", Fset_process_window_size, |
819 | Sset_process_window_size, 3, 3, 0, | |
820 | "Tell PROCESS that it has logical window size HEIGHT and WIDTH.") | |
4ee3e309 EN |
821 | (process, height, width) |
822 | register Lisp_Object process, height, width; | |
396df322 | 823 | { |
4ee3e309 | 824 | CHECK_PROCESS (process, 0); |
396df322 RS |
825 | CHECK_NATNUM (height, 0); |
826 | CHECK_NATNUM (width, 0); | |
4ee3e309 | 827 | if (set_window_size (XINT (XPROCESS (process)->infd), |
396df322 RS |
828 | XINT (height), XINT(width)) <= 0) |
829 | return Qnil; | |
830 | else | |
831 | return Qt; | |
832 | } | |
833 | ||
d0d6b7c5 JB |
834 | DEFUN ("process-kill-without-query", Fprocess_kill_without_query, |
835 | Sprocess_kill_without_query, 1, 2, 0, | |
836 | "Say no query needed if PROCESS is running when Emacs is exited.\n\ | |
f2d2dbfe | 837 | Optional second argument if non-nil says to require a query.\n\ |
d0d6b7c5 | 838 | Value is t if a query was formerly required.") |
4ee3e309 EN |
839 | (process, value) |
840 | register Lisp_Object process, value; | |
d0d6b7c5 JB |
841 | { |
842 | Lisp_Object tem; | |
843 | ||
4ee3e309 EN |
844 | CHECK_PROCESS (process, 0); |
845 | tem = XPROCESS (process)->kill_without_query; | |
846 | XPROCESS (process)->kill_without_query = Fnull (value); | |
d0d6b7c5 JB |
847 | |
848 | return Fnull (tem); | |
849 | } | |
312c9964 RS |
850 | |
851 | #if 0 /* Turned off because we don't currently record this info | |
852 | in the process. Perhaps add it. */ | |
853 | DEFUN ("process-connection", Fprocess_connection, Sprocess_connection, 1, 1, 0, | |
854 | "Return the connection type of `PROCESS'.\n\ | |
855 | The value is `nil' for a pipe,\n\ | |
856 | `t' or `pty' for a pty, or `stream' for a socket connection.") | |
857 | (process) | |
858 | Lisp_Object process; | |
859 | { | |
860 | return XPROCESS (process)->type; | |
861 | } | |
862 | #endif | |
d0d6b7c5 JB |
863 | \f |
864 | Lisp_Object | |
865 | list_processes_1 () | |
866 | { | |
867 | register Lisp_Object tail, tem; | |
868 | Lisp_Object proc, minspace, tem1; | |
869 | register struct buffer *old = current_buffer; | |
870 | register struct Lisp_Process *p; | |
871 | register int state; | |
872 | char tembuf[80]; | |
873 | ||
22719df2 | 874 | XSETFASTINT (minspace, 1); |
d0d6b7c5 JB |
875 | |
876 | set_buffer_internal (XBUFFER (Vstandard_output)); | |
877 | Fbuffer_disable_undo (Vstandard_output); | |
878 | ||
879 | current_buffer->truncate_lines = Qt; | |
880 | ||
881 | write_string ("\ | |
a9fde32e KH |
882 | Proc Status Buffer Tty Command\n\ |
883 | ---- ------ ------ --- -------\n", -1); | |
d0d6b7c5 JB |
884 | |
885 | for (tail = Vprocess_alist; !NILP (tail); tail = Fcdr (tail)) | |
886 | { | |
887 | Lisp_Object symbol; | |
888 | ||
889 | proc = Fcdr (Fcar (tail)); | |
890 | p = XPROCESS (proc); | |
891 | if (NILP (p->childp)) | |
892 | continue; | |
893 | ||
894 | Finsert (1, &p->name); | |
895 | Findent_to (make_number (13), minspace); | |
896 | ||
897 | if (!NILP (p->raw_status_low)) | |
898 | update_status (p); | |
899 | symbol = p->status; | |
bcd69aea | 900 | if (CONSP (p->status)) |
d0d6b7c5 JB |
901 | symbol = XCONS (p->status)->car; |
902 | ||
903 | ||
904 | if (EQ (symbol, Qsignal)) | |
905 | { | |
906 | Lisp_Object tem; | |
907 | tem = Fcar (Fcdr (p->status)); | |
908 | #ifdef VMS | |
909 | if (XINT (tem) < NSIG) | |
b0310da4 | 910 | write_string (sys_errlist [XINT (tem)], -1); |
d0d6b7c5 JB |
911 | else |
912 | #endif | |
913 | Fprinc (symbol, Qnil); | |
914 | } | |
915 | else if (NETCONN_P (proc)) | |
916 | { | |
917 | if (EQ (symbol, Qrun)) | |
918 | write_string ("open", -1); | |
919 | else if (EQ (symbol, Qexit)) | |
920 | write_string ("closed", -1); | |
921 | else | |
922 | Fprinc (symbol, Qnil); | |
923 | } | |
924 | else | |
925 | Fprinc (symbol, Qnil); | |
926 | ||
927 | if (EQ (symbol, Qexit)) | |
928 | { | |
929 | Lisp_Object tem; | |
930 | tem = Fcar (Fcdr (p->status)); | |
931 | if (XFASTINT (tem)) | |
932 | { | |
3162bafa | 933 | sprintf (tembuf, " %d", (int) XFASTINT (tem)); |
d0d6b7c5 JB |
934 | write_string (tembuf, -1); |
935 | } | |
936 | } | |
937 | ||
938 | if (EQ (symbol, Qsignal) || EQ (symbol, Qexit)) | |
939 | remove_process (proc); | |
940 | ||
941 | Findent_to (make_number (22), minspace); | |
942 | if (NILP (p->buffer)) | |
943 | insert_string ("(none)"); | |
944 | else if (NILP (XBUFFER (p->buffer)->name)) | |
945 | insert_string ("(Killed)"); | |
946 | else | |
947 | Finsert (1, &XBUFFER (p->buffer)->name); | |
948 | ||
949 | Findent_to (make_number (37), minspace); | |
950 | ||
a9fde32e KH |
951 | if (STRINGP (p->tty_name)) |
952 | Finsert (1, &p->tty_name); | |
953 | else | |
954 | insert_string ("(none)"); | |
955 | ||
956 | Findent_to (make_number (49), minspace); | |
957 | ||
d0d6b7c5 JB |
958 | if (NETCONN_P (proc)) |
959 | { | |
960 | sprintf (tembuf, "(network stream connection to %s)\n", | |
961 | XSTRING (p->childp)->data); | |
962 | insert_string (tembuf); | |
963 | } | |
964 | else | |
965 | { | |
966 | tem = p->command; | |
967 | while (1) | |
968 | { | |
969 | tem1 = Fcar (tem); | |
970 | Finsert (1, &tem1); | |
971 | tem = Fcdr (tem); | |
972 | if (NILP (tem)) | |
973 | break; | |
974 | insert_string (" "); | |
975 | } | |
976 | insert_string ("\n"); | |
977 | } | |
978 | } | |
979 | return Qnil; | |
980 | } | |
981 | ||
982 | DEFUN ("list-processes", Flist_processes, Slist_processes, 0, 0, "", | |
983 | "Display a list of all processes.\n\ | |
984 | \(Any processes listed as Exited or Signaled are actually eliminated\n\ | |
985 | after the listing is made.)") | |
986 | () | |
987 | { | |
988 | internal_with_output_to_temp_buffer ("*Process List*", | |
989 | list_processes_1, Qnil); | |
990 | return Qnil; | |
991 | } | |
992 | ||
993 | DEFUN ("process-list", Fprocess_list, Sprocess_list, 0, 0, 0, | |
994 | "Return a list of all processes.") | |
995 | () | |
996 | { | |
997 | return Fmapcar (Qcdr, Vprocess_alist); | |
998 | } | |
999 | \f | |
b0310da4 JB |
1000 | /* Starting asynchronous inferior processes. */ |
1001 | ||
1002 | static Lisp_Object start_process_unwind (); | |
1003 | ||
d0d6b7c5 JB |
1004 | DEFUN ("start-process", Fstart_process, Sstart_process, 3, MANY, 0, |
1005 | "Start a program in a subprocess. Return the process object for it.\n\ | |
1006 | Args are NAME BUFFER PROGRAM &rest PROGRAM-ARGS\n\ | |
1007 | NAME is name for process. It is modified if necessary to make it unique.\n\ | |
1008 | BUFFER is the buffer or (buffer-name) to associate with the process.\n\ | |
1009 | Process output goes at end of that buffer, unless you specify\n\ | |
1010 | an output stream or filter function to handle the output.\n\ | |
1011 | BUFFER may be also nil, meaning that this process is not associated\n\ | |
1012 | with any buffer\n\ | |
1013 | Third arg is program file name. It is searched for as in the shell.\n\ | |
1014 | Remaining arguments are strings to give program as arguments.") | |
1015 | (nargs, args) | |
1016 | int nargs; | |
1017 | register Lisp_Object *args; | |
1018 | { | |
1e30af70 | 1019 | Lisp_Object buffer, name, program, proc, current_dir, tem; |
d0d6b7c5 JB |
1020 | #ifdef VMS |
1021 | register unsigned char *new_argv; | |
1022 | int len; | |
1023 | #else | |
1024 | register unsigned char **new_argv; | |
1025 | #endif | |
1026 | register int i; | |
b0310da4 | 1027 | int count = specpdl_ptr - specpdl; |
d0d6b7c5 JB |
1028 | |
1029 | buffer = args[1]; | |
1030 | if (!NILP (buffer)) | |
1031 | buffer = Fget_buffer_create (buffer); | |
1032 | ||
1e30af70 JB |
1033 | /* Make sure that the child will be able to chdir to the current |
1034 | buffer's current directory, or its unhandled equivalent. We | |
1035 | can't just have the child check for an error when it does the | |
1036 | chdir, since it's in a vfork. | |
1037 | ||
1038 | We have to GCPRO around this because Fexpand_file_name and | |
1039 | Funhandled_file_name_directory might call a file name handling | |
1040 | function. The argument list is protected by the caller, so all | |
1041 | we really have to worry about is buffer. */ | |
1042 | { | |
1043 | struct gcpro gcpro1, gcpro2; | |
1044 | ||
1045 | current_dir = current_buffer->directory; | |
1046 | ||
1047 | GCPRO2 (buffer, current_dir); | |
1048 | ||
7af71e17 RS |
1049 | current_dir |
1050 | = expand_and_dir_to_file (Funhandled_file_name_directory (current_dir), | |
1051 | Qnil); | |
1e30af70 JB |
1052 | if (NILP (Ffile_accessible_directory_p (current_dir))) |
1053 | report_file_error ("Setting current directory", | |
1054 | Fcons (current_buffer->directory, Qnil)); | |
1055 | ||
1056 | UNGCPRO; | |
1057 | } | |
1058 | ||
d0d6b7c5 JB |
1059 | name = args[0]; |
1060 | CHECK_STRING (name, 0); | |
1061 | ||
1062 | program = args[2]; | |
1063 | ||
1064 | CHECK_STRING (program, 2); | |
1065 | ||
1066 | #ifdef VMS | |
1067 | /* Make a one member argv with all args concatenated | |
1068 | together separated by a blank. */ | |
1069 | len = XSTRING (program)->size + 2; | |
1070 | for (i = 3; i < nargs; i++) | |
1071 | { | |
1072 | tem = args[i]; | |
1073 | CHECK_STRING (tem, i); | |
1074 | len += XSTRING (tem)->size + 1; /* count the blank */ | |
1075 | } | |
1076 | new_argv = (unsigned char *) alloca (len); | |
1077 | strcpy (new_argv, XSTRING (program)->data); | |
1078 | for (i = 3; i < nargs; i++) | |
1079 | { | |
1080 | tem = args[i]; | |
1081 | CHECK_STRING (tem, i); | |
1082 | strcat (new_argv, " "); | |
1083 | strcat (new_argv, XSTRING (tem)->data); | |
1084 | } | |
b0310da4 JB |
1085 | /* Need to add code here to check for program existence on VMS */ |
1086 | ||
d0d6b7c5 JB |
1087 | #else /* not VMS */ |
1088 | new_argv = (unsigned char **) alloca ((nargs - 1) * sizeof (char *)); | |
1089 | ||
d0d6b7c5 | 1090 | /* If program file name is not absolute, search our path for it */ |
e98d950b RS |
1091 | if (!IS_DIRECTORY_SEP (XSTRING (program)->data[0]) |
1092 | && !(XSTRING (program)->size > 1 | |
1093 | && IS_DEVICE_SEP (XSTRING (program)->data[1]))) | |
d0d6b7c5 | 1094 | { |
3b639868 KH |
1095 | struct gcpro gcpro1, gcpro2, gcpro3, gcpro4; |
1096 | ||
d0d6b7c5 | 1097 | tem = Qnil; |
3b639868 | 1098 | GCPRO4 (name, program, buffer, current_dir); |
5437e9f9 | 1099 | openp (Vexec_path, program, EXEC_SUFFIXES, &tem, 1); |
3b639868 | 1100 | UNGCPRO; |
d0d6b7c5 JB |
1101 | if (NILP (tem)) |
1102 | report_file_error ("Searching for program", Fcons (program, Qnil)); | |
f8a87498 | 1103 | tem = Fexpand_file_name (tem, Qnil); |
d0d6b7c5 JB |
1104 | new_argv[0] = XSTRING (tem)->data; |
1105 | } | |
3b639868 | 1106 | else |
13373f4e RS |
1107 | { |
1108 | if (!NILP (Ffile_directory_p (program))) | |
1109 | error ("Specified program for new process is a directory"); | |
1110 | ||
1111 | new_argv[0] = XSTRING (program)->data; | |
1112 | } | |
3b639868 KH |
1113 | |
1114 | for (i = 3; i < nargs; i++) | |
1115 | { | |
1116 | tem = args[i]; | |
1117 | CHECK_STRING (tem, i); | |
1118 | new_argv[i - 2] = XSTRING (tem)->data; | |
1119 | } | |
1120 | new_argv[i - 2] = 0; | |
d0d6b7c5 JB |
1121 | #endif /* not VMS */ |
1122 | ||
1123 | proc = make_process (name); | |
b0310da4 JB |
1124 | /* If an error occurs and we can't start the process, we want to |
1125 | remove it from the process list. This means that each error | |
1126 | check in create_process doesn't need to call remove_process | |
1127 | itself; it's all taken care of here. */ | |
1128 | record_unwind_protect (start_process_unwind, proc); | |
d0d6b7c5 JB |
1129 | |
1130 | XPROCESS (proc)->childp = Qt; | |
1131 | XPROCESS (proc)->command_channel_p = Qnil; | |
1132 | XPROCESS (proc)->buffer = buffer; | |
1133 | XPROCESS (proc)->sentinel = Qnil; | |
1134 | XPROCESS (proc)->filter = Qnil; | |
1135 | XPROCESS (proc)->command = Flist (nargs - 2, args + 2); | |
1136 | ||
7af71e17 RS |
1137 | /* Make the process marker point into the process buffer (if any). */ |
1138 | if (!NILP (buffer)) | |
1139 | Fset_marker (XPROCESS (proc)->mark, | |
1140 | make_number (BUF_ZV (XBUFFER (buffer))), buffer); | |
1141 | ||
1e30af70 | 1142 | create_process (proc, new_argv, current_dir); |
d0d6b7c5 | 1143 | |
b0310da4 | 1144 | return unbind_to (count, proc); |
d0d6b7c5 JB |
1145 | } |
1146 | ||
b0310da4 | 1147 | /* This function is the unwind_protect form for Fstart_process. If |
8e6208c5 | 1148 | PROC doesn't have its pid set, then we know someone has signaled |
b0310da4 JB |
1149 | an error and the process wasn't started successfully, so we should |
1150 | remove it from the process list. */ | |
1151 | static Lisp_Object | |
1152 | start_process_unwind (proc) | |
1153 | Lisp_Object proc; | |
1154 | { | |
bcd69aea | 1155 | if (!PROCESSP (proc)) |
b0310da4 JB |
1156 | abort (); |
1157 | ||
1158 | /* Was PROC started successfully? */ | |
188d6c4e | 1159 | if (XINT (XPROCESS (proc)->pid) <= 0) |
b0310da4 JB |
1160 | remove_process (proc); |
1161 | ||
1162 | return Qnil; | |
1163 | } | |
1164 | ||
1165 | ||
d0d6b7c5 JB |
1166 | SIGTYPE |
1167 | create_process_1 (signo) | |
1168 | int signo; | |
1169 | { | |
1170 | #ifdef USG | |
1171 | /* USG systems forget handlers when they are used; | |
1172 | must reestablish each time */ | |
1173 | signal (signo, create_process_1); | |
1174 | #endif /* USG */ | |
1175 | } | |
1176 | ||
1177 | #if 0 /* This doesn't work; see the note before sigchld_handler. */ | |
1178 | #ifdef USG | |
1179 | #ifdef SIGCHLD | |
1180 | /* Mimic blocking of signals on system V, which doesn't really have it. */ | |
1181 | ||
1182 | /* Nonzero means we got a SIGCHLD when it was supposed to be blocked. */ | |
1183 | int sigchld_deferred; | |
1184 | ||
1185 | SIGTYPE | |
1186 | create_process_sigchld () | |
1187 | { | |
1188 | signal (SIGCHLD, create_process_sigchld); | |
1189 | ||
1190 | sigchld_deferred = 1; | |
1191 | } | |
1192 | #endif | |
1193 | #endif | |
1194 | #endif | |
1195 | ||
1196 | #ifndef VMS /* VMS version of this function is in vmsproc.c. */ | |
1e30af70 | 1197 | create_process (process, new_argv, current_dir) |
d0d6b7c5 JB |
1198 | Lisp_Object process; |
1199 | char **new_argv; | |
1e30af70 | 1200 | Lisp_Object current_dir; |
d0d6b7c5 | 1201 | { |
ecd1f654 | 1202 | int pid, inchannel, outchannel; |
d0d6b7c5 | 1203 | int sv[2]; |
0dc70c33 KH |
1204 | #ifdef POSIX_SIGNALS |
1205 | sigset_t procmask; | |
1206 | sigset_t blocked; | |
1207 | struct sigaction sigint_action; | |
1208 | struct sigaction sigquit_action; | |
1209 | #ifdef AIX | |
1210 | struct sigaction sighup_action; | |
1211 | #endif | |
1212 | #else /* !POSIX_SIGNALS */ | |
d0d6b7c5 JB |
1213 | #ifdef SIGCHLD |
1214 | SIGTYPE (*sigchld)(); | |
1215 | #endif | |
0dc70c33 | 1216 | #endif /* !POSIX_SIGNALS */ |
ecd1f654 KH |
1217 | /* Use volatile to protect variables from being clobbered by longjmp. */ |
1218 | volatile int forkin, forkout; | |
1219 | volatile int pty_flag = 0; | |
d0d6b7c5 JB |
1220 | extern char **environ; |
1221 | ||
d0d6b7c5 JB |
1222 | inchannel = outchannel = -1; |
1223 | ||
1224 | #ifdef HAVE_PTYS | |
fe45da4e | 1225 | if (!NILP (Vprocess_connection_type)) |
d0d6b7c5 JB |
1226 | outchannel = inchannel = allocate_pty (); |
1227 | ||
d0d6b7c5 JB |
1228 | if (inchannel >= 0) |
1229 | { | |
1230 | #ifndef USG | |
1231 | /* On USG systems it does not work to open the pty's tty here | |
1232 | and then close and reopen it in the child. */ | |
1233 | #ifdef O_NOCTTY | |
1234 | /* Don't let this terminal become our controlling terminal | |
1235 | (in case we don't have one). */ | |
1236 | forkout = forkin = open (pty_name, O_RDWR | O_NOCTTY, 0); | |
1237 | #else | |
1238 | forkout = forkin = open (pty_name, O_RDWR, 0); | |
1239 | #endif | |
1240 | if (forkin < 0) | |
1241 | report_file_error ("Opening pty", Qnil); | |
1242 | #else | |
1243 | forkin = forkout = -1; | |
1244 | #endif /* not USG */ | |
1245 | pty_flag = 1; | |
1246 | } | |
1247 | else | |
1248 | #endif /* HAVE_PTYS */ | |
1249 | #ifdef SKTPAIR | |
1250 | { | |
1251 | if (socketpair (AF_UNIX, SOCK_STREAM, 0, sv) < 0) | |
1252 | report_file_error ("Opening socketpair", Qnil); | |
1253 | outchannel = inchannel = sv[0]; | |
1254 | forkout = forkin = sv[1]; | |
1255 | } | |
1256 | #else /* not SKTPAIR */ | |
1257 | { | |
1258 | pipe (sv); | |
1259 | inchannel = sv[0]; | |
1260 | forkout = sv[1]; | |
1261 | pipe (sv); | |
1262 | outchannel = sv[1]; | |
1263 | forkin = sv[0]; | |
1264 | } | |
1265 | #endif /* not SKTPAIR */ | |
1266 | ||
1267 | #if 0 | |
1268 | /* Replaced by close_process_descs */ | |
1269 | set_exclusive_use (inchannel); | |
1270 | set_exclusive_use (outchannel); | |
1271 | #endif | |
1272 | ||
1273 | /* Stride people say it's a mystery why this is needed | |
1274 | as well as the O_NDELAY, but that it fails without this. */ | |
1275 | #if defined (STRIDE) || (defined (pfa) && defined (HAVE_PTYS)) | |
1276 | { | |
1277 | int one = 1; | |
1278 | ioctl (inchannel, FIONBIO, &one); | |
1279 | } | |
1280 | #endif | |
1281 | ||
1282 | #ifdef O_NONBLOCK | |
1283 | fcntl (inchannel, F_SETFL, O_NONBLOCK); | |
03832893 | 1284 | fcntl (outchannel, F_SETFL, O_NONBLOCK); |
d0d6b7c5 JB |
1285 | #else |
1286 | #ifdef O_NDELAY | |
1287 | fcntl (inchannel, F_SETFL, O_NDELAY); | |
03832893 | 1288 | fcntl (outchannel, F_SETFL, O_NDELAY); |
d0d6b7c5 JB |
1289 | #endif |
1290 | #endif | |
1291 | ||
1292 | /* Record this as an active process, with its channels. | |
1293 | As a result, child_setup will close Emacs's side of the pipes. */ | |
1294 | chan_process[inchannel] = process; | |
1d056e64 KH |
1295 | XSETINT (XPROCESS (process)->infd, inchannel); |
1296 | XSETINT (XPROCESS (process)->outfd, outchannel); | |
d0d6b7c5 JB |
1297 | /* Record the tty descriptor used in the subprocess. */ |
1298 | if (forkin < 0) | |
1299 | XPROCESS (process)->subtty = Qnil; | |
1300 | else | |
22719df2 | 1301 | XSETFASTINT (XPROCESS (process)->subtty, forkin); |
d0d6b7c5 JB |
1302 | XPROCESS (process)->pty_flag = (pty_flag ? Qt : Qnil); |
1303 | XPROCESS (process)->status = Qrun; | |
1304 | ||
1305 | /* Delay interrupts until we have a chance to store | |
1306 | the new fork's pid in its process structure */ | |
0dc70c33 KH |
1307 | #ifdef POSIX_SIGNALS |
1308 | sigemptyset (&blocked); | |
1309 | #ifdef SIGCHLD | |
1310 | sigaddset (&blocked, SIGCHLD); | |
1311 | #endif | |
1312 | #ifdef HAVE_VFORK | |
1313 | /* On many hosts (e.g. Solaris 2.4), if a vforked child calls `signal', | |
1314 | this sets the parent's signal handlers as well as the child's. | |
1315 | So delay all interrupts whose handlers the child might munge, | |
1316 | and record the current handlers so they can be restored later. */ | |
1317 | sigaddset (&blocked, SIGINT ); sigaction (SIGINT , 0, &sigint_action ); | |
1318 | sigaddset (&blocked, SIGQUIT); sigaction (SIGQUIT, 0, &sigquit_action); | |
1319 | #ifdef AIX | |
1320 | sigaddset (&blocked, SIGHUP ); sigaction (SIGHUP , 0, &sighup_action ); | |
1321 | #endif | |
1322 | #endif /* HAVE_VFORK */ | |
1323 | sigprocmask (SIG_BLOCK, &blocked, &procmask); | |
1324 | #else /* !POSIX_SIGNALS */ | |
d0d6b7c5 JB |
1325 | #ifdef SIGCHLD |
1326 | #ifdef BSD4_1 | |
1327 | sighold (SIGCHLD); | |
1328 | #else /* not BSD4_1 */ | |
1329 | #if defined (BSD) || defined (UNIPLUS) || defined (HPUX) | |
1330 | sigsetmask (sigmask (SIGCHLD)); | |
1331 | #else /* ordinary USG */ | |
1332 | #if 0 | |
1333 | sigchld_deferred = 0; | |
1334 | sigchld = signal (SIGCHLD, create_process_sigchld); | |
1335 | #endif | |
1336 | #endif /* ordinary USG */ | |
1337 | #endif /* not BSD4_1 */ | |
1338 | #endif /* SIGCHLD */ | |
0dc70c33 | 1339 | #endif /* !POSIX_SIGNALS */ |
d0d6b7c5 | 1340 | |
3081bf8d | 1341 | FD_SET (inchannel, &input_wait_mask); |
a69281ff | 1342 | FD_SET (inchannel, &non_keyboard_wait_mask); |
3081bf8d KH |
1343 | if (inchannel > max_process_desc) |
1344 | max_process_desc = inchannel; | |
1345 | ||
d0d6b7c5 JB |
1346 | /* Until we store the proper pid, enable sigchld_handler |
1347 | to recognize an unknown pid as standing for this process. | |
1348 | It is very important not to let this `marker' value stay | |
1349 | in the table after this function has returned; if it does | |
1350 | it might cause call-process to hang and subsequent asynchronous | |
1351 | processes to get their return values scrambled. */ | |
1352 | XSETINT (XPROCESS (process)->pid, -1); | |
1353 | ||
1354 | { | |
1355 | /* child_setup must clobber environ on systems with true vfork. | |
1356 | Protect it from permanent change. */ | |
1357 | char **save_environ = environ; | |
1358 | ||
e98d950b | 1359 | #ifndef WINDOWSNT |
d0d6b7c5 JB |
1360 | pid = vfork (); |
1361 | if (pid == 0) | |
e98d950b | 1362 | #endif /* not WINDOWSNT */ |
d0d6b7c5 JB |
1363 | { |
1364 | int xforkin = forkin; | |
1365 | int xforkout = forkout; | |
1366 | ||
1367 | #if 0 /* This was probably a mistake--it duplicates code later on, | |
1368 | but fails to handle all the cases. */ | |
1369 | /* Make sure SIGCHLD is not blocked in the child. */ | |
1370 | sigsetmask (SIGEMPTYMASK); | |
1371 | #endif | |
1372 | ||
1373 | /* Make the pty be the controlling terminal of the process. */ | |
1374 | #ifdef HAVE_PTYS | |
1375 | /* First, disconnect its current controlling terminal. */ | |
1376 | #ifdef HAVE_SETSID | |
7ce48618 RS |
1377 | /* We tried doing setsid only if pty_flag, but it caused |
1378 | process_set_signal to fail on SGI when using a pipe. */ | |
1379 | setsid (); | |
ce4c9c90 | 1380 | /* Make the pty's terminal the controlling terminal. */ |
084fd64a | 1381 | if (pty_flag) |
39e9ebcd | 1382 | { |
39e9ebcd RS |
1383 | #ifdef TIOCSCTTY |
1384 | /* We ignore the return value | |
1385 | because faith@cs.unc.edu says that is necessary on Linux. */ | |
1386 | ioctl (xforkin, TIOCSCTTY, 0); | |
ce4c9c90 | 1387 | #endif |
39e9ebcd | 1388 | } |
d0d6b7c5 | 1389 | #else /* not HAVE_SETSID */ |
c14e53a4 | 1390 | #ifdef USG |
000ab717 | 1391 | /* It's very important to call setpgrp here and no time |
d0d6b7c5 JB |
1392 | afterwards. Otherwise, we lose our controlling tty which |
1393 | is set when we open the pty. */ | |
1394 | setpgrp (); | |
1395 | #endif /* USG */ | |
1396 | #endif /* not HAVE_SETSID */ | |
9bcf8ec6 KH |
1397 | #if defined (HAVE_TERMIOS) && defined (LDISC1) |
1398 | if (pty_flag && xforkin >= 0) | |
1399 | { | |
1400 | struct termios t; | |
1401 | tcgetattr (xforkin, &t); | |
1402 | t.c_lflag = LDISC1; | |
1403 | if (tcsetattr (xforkin, TCSANOW, &t) < 0) | |
1404 | write (1, "create_process/tcsetattr LDISC1 failed\n", 39); | |
1405 | } | |
1406 | #else | |
aafadd9f | 1407 | #if defined (NTTYDISC) && defined (TIOCSETD) |
ff773a4e | 1408 | if (pty_flag && xforkin >= 0) |
afc549fd RS |
1409 | { |
1410 | /* Use new line discipline. */ | |
1411 | int ldisc = NTTYDISC; | |
4458f555 | 1412 | ioctl (xforkin, TIOCSETD, &ldisc); |
afc549fd | 1413 | } |
000ab717 | 1414 | #endif |
9bcf8ec6 | 1415 | #endif |
d0d6b7c5 JB |
1416 | #ifdef TIOCNOTTY |
1417 | /* In 4.3BSD, the TIOCSPGRP bug has been fixed, and now you | |
1418 | can do TIOCSPGRP only to the process's controlling tty. */ | |
1419 | if (pty_flag) | |
1420 | { | |
1421 | /* I wonder: would just ioctl (0, TIOCNOTTY, 0) work here? | |
1422 | I can't test it since I don't have 4.3. */ | |
1423 | int j = open ("/dev/tty", O_RDWR, 0); | |
1424 | ioctl (j, TIOCNOTTY, 0); | |
1425 | close (j); | |
5a570e37 | 1426 | #ifndef USG |
d0d6b7c5 JB |
1427 | /* In order to get a controlling terminal on some versions |
1428 | of BSD, it is necessary to put the process in pgrp 0 | |
1429 | before it opens the terminal. */ | |
3ea1d291 RS |
1430 | #ifdef OSF1 |
1431 | setpgid (0, 0); | |
1432 | #else | |
d0d6b7c5 | 1433 | setpgrp (0, 0); |
3ea1d291 | 1434 | #endif |
d0d6b7c5 JB |
1435 | #endif |
1436 | } | |
1437 | #endif /* TIOCNOTTY */ | |
1438 | ||
e9bf058b | 1439 | #if !defined (RTU) && !defined (UNIPLUS) && !defined (DONT_REOPEN_PTY) |
d0d6b7c5 JB |
1440 | /*** There is a suggestion that this ought to be a |
1441 | conditional on TIOCSPGRP. */ | |
1442 | /* Now close the pty (if we had it open) and reopen it. | |
1443 | This makes the pty the controlling terminal of the subprocess. */ | |
1444 | if (pty_flag) | |
1445 | { | |
99e3d726 RS |
1446 | #ifdef SET_CHILD_PTY_PGRP |
1447 | int pgrp = getpid (); | |
1448 | #endif | |
1449 | ||
d0d6b7c5 JB |
1450 | /* I wonder if close (open (pty_name, ...)) would work? */ |
1451 | if (xforkin >= 0) | |
1452 | close (xforkin); | |
1453 | xforkout = xforkin = open (pty_name, O_RDWR, 0); | |
1454 | ||
4aa54ba8 RS |
1455 | if (xforkin < 0) |
1456 | { | |
1457 | write (1, "Couldn't open the pty terminal ", 31); | |
1458 | write (1, pty_name, strlen (pty_name)); | |
1459 | write (1, "\n", 1); | |
1460 | _exit (1); | |
1461 | } | |
1462 | ||
99e3d726 RS |
1463 | #ifdef SET_CHILD_PTY_PGRP |
1464 | ioctl (xforkin, TIOCSPGRP, &pgrp); | |
1465 | ioctl (xforkout, TIOCSPGRP, &pgrp); | |
1466 | #endif | |
d0d6b7c5 | 1467 | } |
e9bf058b RS |
1468 | #endif /* not UNIPLUS and not RTU and not DONT_REOPEN_PTY */ |
1469 | ||
d0d6b7c5 | 1470 | #ifdef SETUP_SLAVE_PTY |
13a72104 RS |
1471 | if (pty_flag) |
1472 | { | |
1473 | SETUP_SLAVE_PTY; | |
1474 | } | |
d0d6b7c5 JB |
1475 | #endif /* SETUP_SLAVE_PTY */ |
1476 | #ifdef AIX | |
1477 | /* On AIX, we've disabled SIGHUP above once we start a child on a pty. | |
1478 | Now reenable it in the child, so it will die when we want it to. */ | |
1479 | if (pty_flag) | |
1480 | signal (SIGHUP, SIG_DFL); | |
1481 | #endif | |
1482 | #endif /* HAVE_PTYS */ | |
1483 | ||
0dc70c33 KH |
1484 | signal (SIGINT, SIG_DFL); |
1485 | signal (SIGQUIT, SIG_DFL); | |
1486 | ||
1487 | /* Stop blocking signals in the child. */ | |
1488 | #ifdef POSIX_SIGNALS | |
1489 | sigprocmask (SIG_SETMASK, &procmask, 0); | |
1490 | #else /* !POSIX_SIGNALS */ | |
d0d6b7c5 JB |
1491 | #ifdef SIGCHLD |
1492 | #ifdef BSD4_1 | |
1493 | sigrelse (SIGCHLD); | |
1494 | #else /* not BSD4_1 */ | |
1495 | #if defined (BSD) || defined (UNIPLUS) || defined (HPUX) | |
1496 | sigsetmask (SIGEMPTYMASK); | |
1497 | #else /* ordinary USG */ | |
63528b78 | 1498 | #if 0 |
d0d6b7c5 | 1499 | signal (SIGCHLD, sigchld); |
63528b78 | 1500 | #endif |
d0d6b7c5 JB |
1501 | #endif /* ordinary USG */ |
1502 | #endif /* not BSD4_1 */ | |
1503 | #endif /* SIGCHLD */ | |
0dc70c33 | 1504 | #endif /* !POSIX_SIGNALS */ |
5e7e1da2 | 1505 | |
ab01d0a8 RS |
1506 | if (pty_flag) |
1507 | child_setup_tty (xforkout); | |
e98d950b RS |
1508 | #ifdef WINDOWSNT |
1509 | pid = child_setup (xforkin, xforkout, xforkout, | |
1510 | new_argv, 1, current_dir); | |
1511 | #else /* not WINDOWSNT */ | |
d0d6b7c5 | 1512 | child_setup (xforkin, xforkout, xforkout, |
e065a56e | 1513 | new_argv, 1, current_dir); |
e98d950b | 1514 | #endif /* not WINDOWSNT */ |
d0d6b7c5 JB |
1515 | } |
1516 | environ = save_environ; | |
1517 | } | |
1518 | ||
4a127b3b | 1519 | /* This runs in the Emacs process. */ |
d0d6b7c5 | 1520 | if (pid < 0) |
6311cf58 RS |
1521 | { |
1522 | if (forkin >= 0) | |
1523 | close (forkin); | |
1524 | if (forkin != forkout && forkout >= 0) | |
1525 | close (forkout); | |
6311cf58 | 1526 | } |
4a127b3b KH |
1527 | else |
1528 | { | |
1529 | /* vfork succeeded. */ | |
1530 | XSETFASTINT (XPROCESS (process)->pid, pid); | |
d0d6b7c5 | 1531 | |
e98d950b | 1532 | #ifdef WINDOWSNT |
4a127b3b | 1533 | register_child (pid, inchannel); |
e98d950b RS |
1534 | #endif /* WINDOWSNT */ |
1535 | ||
4a127b3b KH |
1536 | /* If the subfork execv fails, and it exits, |
1537 | this close hangs. I don't know why. | |
1538 | So have an interrupt jar it loose. */ | |
1539 | stop_polling (); | |
1540 | signal (SIGALRM, create_process_1); | |
1541 | alarm (1); | |
1542 | XPROCESS (process)->subtty = Qnil; | |
1543 | if (forkin >= 0) | |
1544 | close (forkin); | |
1545 | alarm (0); | |
1546 | start_polling (); | |
1547 | if (forkin != forkout && forkout >= 0) | |
1548 | close (forkout); | |
d0d6b7c5 | 1549 | |
875e6b94 | 1550 | #ifdef HAVE_PTYS |
4a127b3b KH |
1551 | if (pty_flag) |
1552 | XPROCESS (process)->tty_name = build_string (pty_name); | |
1553 | else | |
875e6b94 | 1554 | #endif |
4a127b3b KH |
1555 | XPROCESS (process)->tty_name = Qnil; |
1556 | } | |
3b9a3dfa | 1557 | |
4a127b3b KH |
1558 | /* Restore the signal state whether vfork succeeded or not. |
1559 | (We will signal an error, below, if it failed.) */ | |
0dc70c33 KH |
1560 | #ifdef POSIX_SIGNALS |
1561 | #ifdef HAVE_VFORK | |
1562 | /* Restore the parent's signal handlers. */ | |
1563 | sigaction (SIGINT, &sigint_action, 0); | |
1564 | sigaction (SIGQUIT, &sigquit_action, 0); | |
1565 | #ifdef AIX | |
1566 | sigaction (SIGHUP, &sighup_action, 0); | |
1567 | #endif | |
1568 | #endif /* HAVE_VFORK */ | |
1569 | /* Stop blocking signals in the parent. */ | |
1570 | sigprocmask (SIG_SETMASK, &procmask, 0); | |
1571 | #else /* !POSIX_SIGNALS */ | |
d0d6b7c5 JB |
1572 | #ifdef SIGCHLD |
1573 | #ifdef BSD4_1 | |
1574 | sigrelse (SIGCHLD); | |
1575 | #else /* not BSD4_1 */ | |
1576 | #if defined (BSD) || defined (UNIPLUS) || defined (HPUX) | |
1577 | sigsetmask (SIGEMPTYMASK); | |
1578 | #else /* ordinary USG */ | |
1579 | #if 0 | |
1580 | signal (SIGCHLD, sigchld); | |
1581 | /* Now really handle any of these signals | |
1582 | that came in during this function. */ | |
1583 | if (sigchld_deferred) | |
1584 | kill (getpid (), SIGCHLD); | |
1585 | #endif | |
1586 | #endif /* ordinary USG */ | |
1587 | #endif /* not BSD4_1 */ | |
1588 | #endif /* SIGCHLD */ | |
0dc70c33 | 1589 | #endif /* !POSIX_SIGNALS */ |
4a127b3b KH |
1590 | |
1591 | /* Now generate the error if vfork failed. */ | |
1592 | if (pid < 0) | |
1593 | report_file_error ("Doing vfork", Qnil); | |
d0d6b7c5 JB |
1594 | } |
1595 | #endif /* not VMS */ | |
1596 | ||
1597 | #ifdef HAVE_SOCKETS | |
1598 | ||
1599 | /* open a TCP network connection to a given HOST/SERVICE. Treated | |
1600 | exactly like a normal process when reading and writing. Only | |
1601 | differences are in status display and process deletion. A network | |
1602 | connection has no PID; you cannot signal it. All you can do is | |
1603 | deactivate and close it via delete-process */ | |
1604 | ||
1605 | DEFUN ("open-network-stream", Fopen_network_stream, Sopen_network_stream, | |
1606 | 4, 4, 0, | |
1607 | "Open a TCP connection for a service to a host.\n\ | |
1608 | Returns a subprocess-object to represent the connection.\n\ | |
1609 | Input and output work as for subprocesses; `delete-process' closes it.\n\ | |
1610 | Args are NAME BUFFER HOST SERVICE.\n\ | |
1611 | NAME is name for process. It is modified if necessary to make it unique.\n\ | |
1612 | BUFFER is the buffer (or buffer-name) to associate with the process.\n\ | |
1613 | Process output goes at end of that buffer, unless you specify\n\ | |
1614 | an output stream or filter function to handle the output.\n\ | |
1615 | BUFFER may be also nil, meaning that this process is not associated\n\ | |
1616 | with any buffer\n\ | |
1617 | Third arg is name of the host to connect to, or its IP address.\n\ | |
1618 | Fourth arg SERVICE is name of the service desired, or an integer\n\ | |
1619 | specifying a port number to connect to.") | |
1620 | (name, buffer, host, service) | |
1621 | Lisp_Object name, buffer, host, service; | |
1622 | { | |
1623 | Lisp_Object proc; | |
1624 | register int i; | |
1625 | struct sockaddr_in address; | |
1626 | struct servent *svc_info; | |
1627 | struct hostent *host_info_ptr, host_info; | |
1628 | char *(addr_list[2]); | |
79967d5e | 1629 | IN_ADDR numeric_addr; |
d0d6b7c5 JB |
1630 | int s, outch, inch; |
1631 | char errstring[80]; | |
1632 | int port; | |
1633 | struct hostent host_info_fixed; | |
1634 | struct gcpro gcpro1, gcpro2, gcpro3, gcpro4; | |
e333e864 | 1635 | int retry = 0; |
44ade2e9 | 1636 | int count = specpdl_ptr - specpdl; |
d0d6b7c5 | 1637 | |
bff3ed0a RS |
1638 | #ifdef WINDOWSNT |
1639 | /* Ensure socket support is loaded if available. */ | |
1640 | init_winsock (TRUE); | |
1641 | #endif | |
1642 | ||
d0d6b7c5 JB |
1643 | GCPRO4 (name, buffer, host, service); |
1644 | CHECK_STRING (name, 0); | |
1645 | CHECK_STRING (host, 0); | |
bcd69aea | 1646 | if (INTEGERP (service)) |
d0d6b7c5 JB |
1647 | port = htons ((unsigned short) XINT (service)); |
1648 | else | |
1649 | { | |
1650 | CHECK_STRING (service, 0); | |
1651 | svc_info = getservbyname (XSTRING (service)->data, "tcp"); | |
1652 | if (svc_info == 0) | |
1653 | error ("Unknown service \"%s\"", XSTRING (service)->data); | |
1654 | port = svc_info->s_port; | |
1655 | } | |
1656 | ||
798b64bb KH |
1657 | /* Slow down polling to every ten seconds. |
1658 | Some kernels have a bug which causes retrying connect to fail | |
1659 | after a connect. Polling can interfere with gethostbyname too. */ | |
1660 | #ifdef POLL_FOR_INPUT | |
1661 | bind_polling_period (10); | |
1662 | #endif | |
1663 | ||
1d2c16fa | 1664 | #ifndef TERM |
616da37c RS |
1665 | while (1) |
1666 | { | |
5f0929a7 RS |
1667 | #ifdef TRY_AGAIN |
1668 | h_errno = 0; | |
1669 | #endif | |
5d6c2aa3 RS |
1670 | immediate_quit = 1; |
1671 | QUIT; | |
616da37c | 1672 | host_info_ptr = gethostbyname (XSTRING (host)->data); |
5d6c2aa3 | 1673 | immediate_quit = 0; |
616da37c RS |
1674 | #ifdef TRY_AGAIN |
1675 | if (! (host_info_ptr == 0 && h_errno == TRY_AGAIN)) | |
1676 | #endif | |
1677 | break; | |
1678 | Fsleep_for (make_number (1), Qnil); | |
1679 | } | |
d0d6b7c5 JB |
1680 | if (host_info_ptr == 0) |
1681 | /* Attempt to interpret host as numeric inet address */ | |
1682 | { | |
393a9679 | 1683 | numeric_addr = inet_addr ((char *) XSTRING (host)->data); |
79967d5e | 1684 | if (NUMERIC_ADDR_ERROR) |
d0d6b7c5 JB |
1685 | error ("Unknown host \"%s\"", XSTRING (host)->data); |
1686 | ||
1687 | host_info_ptr = &host_info; | |
1688 | host_info.h_name = 0; | |
1689 | host_info.h_aliases = 0; | |
1690 | host_info.h_addrtype = AF_INET; | |
39a21be6 JB |
1691 | #ifdef h_addr |
1692 | /* Older machines have only one address slot called h_addr. | |
1693 | Newer machines have h_addr_list, but #define h_addr to | |
1694 | be its first element. */ | |
1695 | host_info.h_addr_list = &(addr_list[0]); | |
1696 | #endif | |
1697 | host_info.h_addr = (char*)(&numeric_addr); | |
d0d6b7c5 | 1698 | addr_list[1] = 0; |
8777fbe2 RS |
1699 | /* numeric_addr isn't null-terminated; it has fixed length. */ |
1700 | host_info.h_length = sizeof (numeric_addr); | |
d0d6b7c5 JB |
1701 | } |
1702 | ||
1703 | bzero (&address, sizeof address); | |
1704 | bcopy (host_info_ptr->h_addr, (char *) &address.sin_addr, | |
1705 | host_info_ptr->h_length); | |
1706 | address.sin_family = host_info_ptr->h_addrtype; | |
1707 | address.sin_port = port; | |
1708 | ||
1709 | s = socket (host_info_ptr->h_addrtype, SOCK_STREAM, 0); | |
1710 | if (s < 0) | |
1711 | report_file_error ("error creating socket", Fcons (name, Qnil)); | |
1712 | ||
457a9bee RS |
1713 | /* Kernel bugs (on Ultrix at least) cause lossage (not just EINTR) |
1714 | when connect is interrupted. So let's not let it get interrupted. | |
1715 | Note we do not turn off polling, because polling is only used | |
1716 | when not interrupt_input, and thus not normally used on the systems | |
1717 | which have this bug. On systems which use polling, there's no way | |
1718 | to quit if polling is turned off. */ | |
1719 | if (interrupt_input) | |
1720 | unrequest_sigio (); | |
1721 | ||
d0d6b7c5 | 1722 | loop: |
0f2ee0c1 RS |
1723 | |
1724 | immediate_quit = 1; | |
1725 | QUIT; | |
1726 | ||
e333e864 RS |
1727 | if (connect (s, (struct sockaddr *) &address, sizeof address) == -1 |
1728 | && errno != EISCONN) | |
d0d6b7c5 JB |
1729 | { |
1730 | int xerrno = errno; | |
e333e864 | 1731 | |
0f2ee0c1 RS |
1732 | immediate_quit = 0; |
1733 | ||
d0d6b7c5 JB |
1734 | if (errno == EINTR) |
1735 | goto loop; | |
e333e864 RS |
1736 | if (errno == EADDRINUSE && retry < 20) |
1737 | { | |
4590788a RS |
1738 | /* A delay here is needed on some FreeBSD systems, |
1739 | and it is harmless, since this retrying takes time anyway | |
1740 | and should be infrequent. */ | |
1741 | Fsleep_for (make_number (1), Qnil); | |
e333e864 RS |
1742 | retry++; |
1743 | goto loop; | |
1744 | } | |
1745 | ||
d0d6b7c5 | 1746 | close (s); |
457a9bee RS |
1747 | |
1748 | if (interrupt_input) | |
1749 | request_sigio (); | |
1750 | ||
d0d6b7c5 JB |
1751 | errno = xerrno; |
1752 | report_file_error ("connection failed", | |
1753 | Fcons (host, Fcons (name, Qnil))); | |
1754 | } | |
457a9bee | 1755 | |
0f2ee0c1 RS |
1756 | immediate_quit = 0; |
1757 | ||
44ade2e9 RS |
1758 | #ifdef POLL_FOR_INPUT |
1759 | unbind_to (count, Qnil); | |
1760 | #endif | |
1761 | ||
457a9bee RS |
1762 | if (interrupt_input) |
1763 | request_sigio (); | |
1764 | ||
1d2c16fa RS |
1765 | #else /* TERM */ |
1766 | s = connect_server (0); | |
1767 | if (s < 0) | |
1768 | report_file_error ("error creating socket", Fcons (name, Qnil)); | |
1769 | send_command (s, C_PORT, 0, "%s:%d", XSTRING (host)->data, ntohs (port)); | |
1770 | send_command (s, C_DUMB, 1, 0); | |
1771 | #endif /* TERM */ | |
d0d6b7c5 JB |
1772 | |
1773 | inch = s; | |
1774 | outch = dup (s); | |
1775 | if (outch < 0) | |
1776 | report_file_error ("error duplicating socket", Fcons (name, Qnil)); | |
1777 | ||
1778 | if (!NILP (buffer)) | |
1779 | buffer = Fget_buffer_create (buffer); | |
1780 | proc = make_process (name); | |
1781 | ||
1782 | chan_process[inch] = proc; | |
1783 | ||
1784 | #ifdef O_NONBLOCK | |
1785 | fcntl (inch, F_SETFL, O_NONBLOCK); | |
1786 | #else | |
1787 | #ifdef O_NDELAY | |
1788 | fcntl (inch, F_SETFL, O_NDELAY); | |
1789 | #endif | |
1790 | #endif | |
1791 | ||
1792 | XPROCESS (proc)->childp = host; | |
1793 | XPROCESS (proc)->command_channel_p = Qnil; | |
1794 | XPROCESS (proc)->buffer = buffer; | |
1795 | XPROCESS (proc)->sentinel = Qnil; | |
1796 | XPROCESS (proc)->filter = Qnil; | |
1797 | XPROCESS (proc)->command = Qnil; | |
1798 | XPROCESS (proc)->pid = Qnil; | |
7795ff9b | 1799 | XSETINT (XPROCESS (proc)->infd, inch); |
1d056e64 | 1800 | XSETINT (XPROCESS (proc)->outfd, outch); |
d0d6b7c5 JB |
1801 | XPROCESS (proc)->status = Qrun; |
1802 | FD_SET (inch, &input_wait_mask); | |
a69281ff | 1803 | FD_SET (inch, &non_keyboard_wait_mask); |
7d0e672e RS |
1804 | if (inch > max_process_desc) |
1805 | max_process_desc = inch; | |
d0d6b7c5 JB |
1806 | |
1807 | UNGCPRO; | |
1808 | return proc; | |
1809 | } | |
1810 | #endif /* HAVE_SOCKETS */ | |
1811 | ||
1812 | deactivate_process (proc) | |
1813 | Lisp_Object proc; | |
1814 | { | |
1815 | register int inchannel, outchannel; | |
1816 | register struct Lisp_Process *p = XPROCESS (proc); | |
1817 | ||
a9f2c884 RS |
1818 | inchannel = XINT (p->infd); |
1819 | outchannel = XINT (p->outfd); | |
d0d6b7c5 | 1820 | |
a9f2c884 | 1821 | if (inchannel >= 0) |
d0d6b7c5 JB |
1822 | { |
1823 | /* Beware SIGCHLD hereabouts. */ | |
1824 | flush_pending_output (inchannel); | |
1825 | #ifdef VMS | |
1826 | { | |
1827 | VMS_PROC_STUFF *get_vms_process_pointer (), *vs; | |
1828 | sys$dassgn (outchannel); | |
c6c6865d | 1829 | vs = get_vms_process_pointer (p->pid); |
d0d6b7c5 JB |
1830 | if (vs) |
1831 | give_back_vms_process_stuff (vs); | |
1832 | } | |
1833 | #else | |
1834 | close (inchannel); | |
a9f2c884 | 1835 | if (outchannel >= 0 && outchannel != inchannel) |
d0d6b7c5 JB |
1836 | close (outchannel); |
1837 | #endif | |
1838 | ||
1d056e64 KH |
1839 | XSETINT (p->infd, -1); |
1840 | XSETINT (p->outfd, -1); | |
d0d6b7c5 JB |
1841 | chan_process[inchannel] = Qnil; |
1842 | FD_CLR (inchannel, &input_wait_mask); | |
a69281ff | 1843 | FD_CLR (inchannel, &non_keyboard_wait_mask); |
7d0e672e RS |
1844 | if (inchannel == max_process_desc) |
1845 | { | |
1846 | int i; | |
1847 | /* We just closed the highest-numbered process input descriptor, | |
1848 | so recompute the highest-numbered one now. */ | |
1849 | max_process_desc = 0; | |
1850 | for (i = 0; i < MAXDESC; i++) | |
1851 | if (!NILP (chan_process[i])) | |
1852 | max_process_desc = i; | |
1853 | } | |
d0d6b7c5 JB |
1854 | } |
1855 | } | |
1856 | ||
1857 | /* Close all descriptors currently in use for communication | |
1858 | with subprocess. This is used in a newly-forked subprocess | |
1859 | to get rid of irrelevant descriptors. */ | |
1860 | ||
1861 | close_process_descs () | |
1862 | { | |
e98d950b | 1863 | #ifndef WINDOWSNT |
d0d6b7c5 JB |
1864 | int i; |
1865 | for (i = 0; i < MAXDESC; i++) | |
1866 | { | |
1867 | Lisp_Object process; | |
1868 | process = chan_process[i]; | |
1869 | if (!NILP (process)) | |
1870 | { | |
a9f2c884 RS |
1871 | int in = XINT (XPROCESS (process)->infd); |
1872 | int out = XINT (XPROCESS (process)->outfd); | |
1873 | if (in >= 0) | |
d0d6b7c5 | 1874 | close (in); |
a9f2c884 | 1875 | if (out >= 0 && in != out) |
d0d6b7c5 JB |
1876 | close (out); |
1877 | } | |
1878 | } | |
e98d950b | 1879 | #endif |
d0d6b7c5 JB |
1880 | } |
1881 | \f | |
1882 | DEFUN ("accept-process-output", Faccept_process_output, Saccept_process_output, | |
1883 | 0, 3, 0, | |
1884 | "Allow any pending output from subprocesses to be read by Emacs.\n\ | |
1885 | It is read into the process' buffers or given to their filter functions.\n\ | |
1886 | Non-nil arg PROCESS means do not return until some output has been received\n\ | |
1887 | from PROCESS.\n\ | |
1888 | Non-nil second arg TIMEOUT and third arg TIMEOUT-MSECS are number of\n\ | |
1889 | seconds and microseconds to wait; return after that much time whether\n\ | |
1890 | or not there is input.\n\ | |
1891 | Return non-nil iff we received any output before the timeout expired.") | |
4ee3e309 EN |
1892 | (process, timeout, timeout_msecs) |
1893 | register Lisp_Object process, timeout, timeout_msecs; | |
d0d6b7c5 JB |
1894 | { |
1895 | int seconds; | |
1896 | int useconds; | |
1897 | ||
1898 | if (! NILP (timeout_msecs)) | |
1899 | { | |
1900 | CHECK_NUMBER (timeout_msecs, 2); | |
1901 | useconds = XINT (timeout_msecs); | |
bcd69aea | 1902 | if (!INTEGERP (timeout)) |
1d056e64 | 1903 | XSETINT (timeout, 0); |
d0d6b7c5 JB |
1904 | |
1905 | { | |
1906 | int carry = useconds / 1000000; | |
1907 | ||
1908 | XSETINT (timeout, XINT (timeout) + carry); | |
1909 | useconds -= carry * 1000000; | |
1910 | ||
1911 | /* I think this clause is necessary because C doesn't | |
1912 | guarantee a particular rounding direction for negative | |
1913 | integers. */ | |
1914 | if (useconds < 0) | |
1915 | { | |
1916 | XSETINT (timeout, XINT (timeout) - 1); | |
1917 | useconds += 1000000; | |
1918 | } | |
1919 | } | |
1920 | } | |
de946e5a RS |
1921 | else |
1922 | useconds = 0; | |
d0d6b7c5 JB |
1923 | |
1924 | if (! NILP (timeout)) | |
1925 | { | |
1926 | CHECK_NUMBER (timeout, 1); | |
1927 | seconds = XINT (timeout); | |
ada9a4fd | 1928 | if (seconds < 0 || (seconds == 0 && useconds == 0)) |
d0d6b7c5 JB |
1929 | seconds = -1; |
1930 | } | |
1931 | else | |
1932 | { | |
4ee3e309 | 1933 | if (NILP (process)) |
d0d6b7c5 JB |
1934 | seconds = -1; |
1935 | else | |
1936 | seconds = 0; | |
1937 | } | |
1938 | ||
4ee3e309 EN |
1939 | if (NILP (process)) |
1940 | XSETFASTINT (process, 0); | |
f76475ad | 1941 | |
d0d6b7c5 | 1942 | return |
4ee3e309 | 1943 | (wait_reading_process_input (seconds, useconds, process, 0) |
d0d6b7c5 JB |
1944 | ? Qt : Qnil); |
1945 | } | |
1946 | ||
1947 | /* This variable is different from waiting_for_input in keyboard.c. | |
1948 | It is used to communicate to a lisp process-filter/sentinel (via the | |
1949 | function Fwaiting_for_user_input_p below) whether emacs was waiting | |
1950 | for user-input when that process-filter was called. | |
1951 | waiting_for_input cannot be used as that is by definition 0 when | |
d430ee71 RS |
1952 | lisp code is being evalled. |
1953 | This is also used in record_asynch_buffer_change. | |
1954 | For that purpose, this must be 0 | |
1955 | when not inside wait_reading_process_input. */ | |
d0d6b7c5 JB |
1956 | static int waiting_for_user_input_p; |
1957 | ||
c573ae8e RS |
1958 | /* This is here so breakpoints can be put on it. */ |
1959 | static | |
1960 | wait_reading_process_input_1 () | |
1961 | { | |
1962 | } | |
1963 | ||
d0d6b7c5 JB |
1964 | /* Read and dispose of subprocess output while waiting for timeout to |
1965 | elapse and/or keyboard input to be available. | |
1966 | ||
de6fd4b9 | 1967 | TIME_LIMIT is: |
d0d6b7c5 JB |
1968 | timeout in seconds, or |
1969 | zero for no limit, or | |
1970 | -1 means gobble data immediately available but don't wait for any. | |
1971 | ||
de6fd4b9 RS |
1972 | MICROSECS is: |
1973 | an additional duration to wait, measured in microseconds. | |
1974 | If this is nonzero and time_limit is 0, then the timeout | |
1975 | consists of MICROSECS only. | |
6e4f3667 | 1976 | |
de6fd4b9 | 1977 | READ_KBD is a lisp value: |
d0d6b7c5 JB |
1978 | 0 to ignore keyboard input, or |
1979 | 1 to return when input is available, or | |
84aa3ace | 1980 | -1 meaning caller will actually read the input, so don't throw to |
d0d6b7c5 | 1981 | the quit handler, or |
e6194ffc | 1982 | a cons cell, meaning wait until its car is non-nil |
de6fd4b9 | 1983 | (and gobble terminal input into the buffer if any arrives), or |
f76475ad JB |
1984 | a process object, meaning wait until something arrives from that |
1985 | process. The return value is true iff we read some input from | |
1986 | that process. | |
d0d6b7c5 | 1987 | |
de6fd4b9 | 1988 | DO_DISPLAY != 0 means redisplay should be done to show subprocess |
d0d6b7c5 JB |
1989 | output that arrives. |
1990 | ||
de6fd4b9 | 1991 | If READ_KBD is a pointer to a struct Lisp_Process, then the |
d0d6b7c5 JB |
1992 | function returns true iff we received input from that process |
1993 | before the timeout elapsed. | |
eb8c3be9 | 1994 | Otherwise, return true iff we received input from any process. */ |
d0d6b7c5 JB |
1995 | |
1996 | wait_reading_process_input (time_limit, microsecs, read_kbd, do_display) | |
f76475ad JB |
1997 | int time_limit, microsecs; |
1998 | Lisp_Object read_kbd; | |
1999 | int do_display; | |
d0d6b7c5 JB |
2000 | { |
2001 | register int channel, nfds, m; | |
2002 | static SELECT_TYPE Available; | |
2003 | int xerrno; | |
2004 | Lisp_Object proc; | |
2005 | EMACS_TIME timeout, end_time, garbage; | |
2006 | SELECT_TYPE Atemp; | |
a9f2c884 | 2007 | int wait_channel = -1; |
d0d6b7c5 JB |
2008 | struct Lisp_Process *wait_proc = 0; |
2009 | int got_some_input = 0; | |
84aa3ace | 2010 | Lisp_Object *wait_for_cell = 0; |
d0d6b7c5 JB |
2011 | |
2012 | FD_ZERO (&Available); | |
2013 | ||
f76475ad JB |
2014 | /* If read_kbd is a process to watch, set wait_proc and wait_channel |
2015 | accordingly. */ | |
bcd69aea | 2016 | if (PROCESSP (read_kbd)) |
d0d6b7c5 | 2017 | { |
f76475ad | 2018 | wait_proc = XPROCESS (read_kbd); |
a9f2c884 | 2019 | wait_channel = XINT (wait_proc->infd); |
22719df2 | 2020 | XSETFASTINT (read_kbd, 0); |
d0d6b7c5 JB |
2021 | } |
2022 | ||
84aa3ace | 2023 | /* If waiting for non-nil in a cell, record where. */ |
bcd69aea | 2024 | if (CONSP (read_kbd)) |
84aa3ace RS |
2025 | { |
2026 | wait_for_cell = &XCONS (read_kbd)->car; | |
22719df2 | 2027 | XSETFASTINT (read_kbd, 0); |
84aa3ace RS |
2028 | } |
2029 | ||
f76475ad | 2030 | waiting_for_user_input_p = XINT (read_kbd); |
d0d6b7c5 JB |
2031 | |
2032 | /* Since we may need to wait several times, | |
2033 | compute the absolute time to return at. */ | |
2034 | if (time_limit || microsecs) | |
2035 | { | |
2036 | EMACS_GET_TIME (end_time); | |
2037 | EMACS_SET_SECS_USECS (timeout, time_limit, microsecs); | |
2038 | EMACS_ADD_TIME (end_time, end_time, timeout); | |
2039 | } | |
2040 | ||
d0d6b7c5 JB |
2041 | while (1) |
2042 | { | |
c0239a0b RS |
2043 | int timeout_reduced_for_timers = 0; |
2044 | ||
d0d6b7c5 JB |
2045 | /* If calling from keyboard input, do not quit |
2046 | since we want to return C-g as an input character. | |
2047 | Otherwise, do pending quit if requested. */ | |
f76475ad | 2048 | if (XINT (read_kbd) >= 0) |
d0d6b7c5 JB |
2049 | QUIT; |
2050 | ||
889255b4 RS |
2051 | /* Exit now if the cell we're waiting for became non-nil. */ |
2052 | if (wait_for_cell && ! NILP (*wait_for_cell)) | |
2053 | break; | |
2054 | ||
d0d6b7c5 JB |
2055 | /* Compute time from now till when time limit is up */ |
2056 | /* Exit if already run out */ | |
2057 | if (time_limit == -1) | |
2058 | { | |
2059 | /* -1 specified for timeout means | |
2060 | gobble output available now | |
2061 | but don't wait at all. */ | |
2062 | ||
2063 | EMACS_SET_SECS_USECS (timeout, 0, 0); | |
2064 | } | |
2065 | else if (time_limit || microsecs) | |
2066 | { | |
2067 | EMACS_GET_TIME (timeout); | |
2068 | EMACS_SUB_TIME (timeout, end_time, timeout); | |
2069 | if (EMACS_TIME_NEG_P (timeout)) | |
2070 | break; | |
2071 | } | |
2072 | else | |
2073 | { | |
2074 | EMACS_SET_SECS_USECS (timeout, 100000, 0); | |
2075 | } | |
2076 | ||
f854a00b RS |
2077 | /* Normally we run timers here. |
2078 | But not if wait_for_cell; in those cases, | |
2079 | the wait is supposed to be short, | |
2080 | and those callers cannot handle running arbitrary Lisp code here. */ | |
2081 | if (! wait_for_cell) | |
fb4c3627 | 2082 | { |
c0239a0b | 2083 | EMACS_TIME timer_delay; |
c573ae8e RS |
2084 | int old_timers_run; |
2085 | ||
2086 | retry: | |
2087 | old_timers_run = timers_run; | |
c0239a0b | 2088 | timer_delay = timer_check (1); |
5de50bfb | 2089 | if (timers_run != old_timers_run && do_display) |
c573ae8e RS |
2090 | { |
2091 | redisplay_preserve_echo_area (); | |
2092 | /* We must retry, since a timer may have requeued itself | |
2093 | and that could alter the time_delay. */ | |
2094 | goto retry; | |
2095 | } | |
2096 | ||
c0239a0b | 2097 | if (! EMACS_TIME_NEG_P (timer_delay) && time_limit != -1) |
fb4c3627 RS |
2098 | { |
2099 | EMACS_TIME difference; | |
2100 | EMACS_SUB_TIME (difference, timer_delay, timeout); | |
2101 | if (EMACS_TIME_NEG_P (difference)) | |
c0239a0b RS |
2102 | { |
2103 | timeout = timer_delay; | |
2104 | timeout_reduced_for_timers = 1; | |
2105 | } | |
fb4c3627 | 2106 | } |
4abca5e7 RS |
2107 | /* If time_limit is -1, we are not going to wait at all. */ |
2108 | else if (time_limit != -1) | |
c573ae8e RS |
2109 | { |
2110 | /* This is so a breakpoint can be put here. */ | |
2111 | wait_reading_process_input_1 (); | |
2112 | } | |
fb4c3627 RS |
2113 | } |
2114 | ||
90ab1a81 JB |
2115 | /* Cause C-g and alarm signals to take immediate action, |
2116 | and cause input available signals to zero out timeout. | |
2117 | ||
2118 | It is important that we do this before checking for process | |
2119 | activity. If we get a SIGCHLD after the explicit checks for | |
2120 | process activity, timeout is the only way we will know. */ | |
2121 | if (XINT (read_kbd) < 0) | |
2122 | set_waiting_for_input (&timeout); | |
2123 | ||
6be429b1 JB |
2124 | /* If status of something has changed, and no input is |
2125 | available, notify the user of the change right away. After | |
2126 | this explicit check, we'll let the SIGCHLD handler zap | |
2127 | timeout to get our attention. */ | |
2128 | if (update_tick != process_tick && do_display) | |
2129 | { | |
2130 | Atemp = input_wait_mask; | |
2131 | EMACS_SET_SECS_USECS (timeout, 0, 0); | |
ecd1f654 KH |
2132 | if ((select (MAXDESC, &Atemp, (SELECT_TYPE *)0, (SELECT_TYPE *)0, |
2133 | &timeout) | |
2134 | <= 0)) | |
90ab1a81 JB |
2135 | { |
2136 | /* It's okay for us to do this and then continue with | |
a0e4d3f3 | 2137 | the loop, since timeout has already been zeroed out. */ |
90ab1a81 JB |
2138 | clear_waiting_for_input (); |
2139 | status_notify (); | |
2140 | } | |
6be429b1 JB |
2141 | } |
2142 | ||
2143 | /* Don't wait for output from a non-running process. */ | |
2144 | if (wait_proc != 0 && !NILP (wait_proc->raw_status_low)) | |
2145 | update_status (wait_proc); | |
2146 | if (wait_proc != 0 | |
2147 | && ! EQ (wait_proc->status, Qrun)) | |
9aa2a7f4 JB |
2148 | { |
2149 | clear_waiting_for_input (); | |
2150 | break; | |
2151 | } | |
6be429b1 | 2152 | |
d0d6b7c5 JB |
2153 | /* Wait till there is something to do */ |
2154 | ||
5e7e1da2 | 2155 | if (! XINT (read_kbd) && wait_for_cell == 0) |
a69281ff RS |
2156 | Available = non_keyboard_wait_mask; |
2157 | else | |
2158 | Available = input_wait_mask; | |
d0d6b7c5 | 2159 | |
ff11dfa1 | 2160 | /* If frame size has changed or the window is newly mapped, |
ffd56f97 JB |
2161 | redisplay now, before we start to wait. There is a race |
2162 | condition here; if a SIGIO arrives between now and the select | |
016899c0 JB |
2163 | and indicates that a frame is trashed, the select may block |
2164 | displaying a trashed screen. */ | |
5164ee8e | 2165 | if (frame_garbaged && do_display) |
7286affd RS |
2166 | { |
2167 | clear_waiting_for_input (); | |
2168 | redisplay_preserve_echo_area (); | |
2169 | if (XINT (read_kbd) < 0) | |
7efe788e | 2170 | set_waiting_for_input (&timeout); |
7286affd | 2171 | } |
ffd56f97 | 2172 | |
0a65b032 RS |
2173 | if (XINT (read_kbd) && detect_input_pending ()) |
2174 | { | |
2175 | nfds = 0; | |
2176 | FD_ZERO (&Available); | |
2177 | } | |
2178 | else | |
2179 | nfds = select (MAXDESC, &Available, (SELECT_TYPE *)0, (SELECT_TYPE *)0, | |
2180 | &timeout); | |
6720a7fb | 2181 | |
d0d6b7c5 JB |
2182 | xerrno = errno; |
2183 | ||
2184 | /* Make C-g and alarm signals set flags again */ | |
2185 | clear_waiting_for_input (); | |
2186 | ||
2187 | /* If we woke up due to SIGWINCH, actually change size now. */ | |
2188 | do_pending_window_change (); | |
2189 | ||
c0239a0b RS |
2190 | if (time_limit && nfds == 0 && ! timeout_reduced_for_timers) |
2191 | /* We wanted the full specified time, so return now. */ | |
d0d6b7c5 JB |
2192 | break; |
2193 | if (nfds < 0) | |
2194 | { | |
2195 | if (xerrno == EINTR) | |
2196 | FD_ZERO (&Available); | |
b0310da4 JB |
2197 | #ifdef ultrix |
2198 | /* Ultrix select seems to return ENOMEM when it is | |
2199 | interrupted. Treat it just like EINTR. Bleah. Note | |
2200 | that we want to test for the "ultrix" CPP symbol, not | |
2201 | "__ultrix__"; the latter is only defined under GCC, but | |
2202 | not by DEC's bundled CC. -JimB */ | |
8058415c JB |
2203 | else if (xerrno == ENOMEM) |
2204 | FD_ZERO (&Available); | |
2205 | #endif | |
d0d6b7c5 JB |
2206 | #ifdef ALLIANT |
2207 | /* This happens for no known reason on ALLIANT. | |
2208 | I am guessing that this is the right response. -- RMS. */ | |
2209 | else if (xerrno == EFAULT) | |
2210 | FD_ZERO (&Available); | |
2211 | #endif | |
2212 | else if (xerrno == EBADF) | |
2213 | { | |
2214 | #ifdef AIX | |
2215 | /* AIX doesn't handle PTY closure the same way BSD does. On AIX, | |
2216 | the child's closure of the pts gives the parent a SIGHUP, and | |
2217 | the ptc file descriptor is automatically closed, | |
2218 | yielding EBADF here or at select() call above. | |
2219 | So, SIGHUP is ignored (see def of PTY_TTY_NAME_SPRINTF | |
a0e4d3f3 | 2220 | in m/ibmrt-aix.h), and here we just ignore the select error. |
d0d6b7c5 | 2221 | Cleanup occurs c/o status_notify after SIGCLD. */ |
ffd56f97 | 2222 | FD_ZERO (&Available); /* Cannot depend on values returned */ |
d0d6b7c5 JB |
2223 | #else |
2224 | abort (); | |
2225 | #endif | |
2226 | } | |
2227 | else | |
6ed6233b | 2228 | error ("select error: %s", strerror (xerrno)); |
d0d6b7c5 | 2229 | } |
26ec91de | 2230 | #if defined(sun) && !defined(USG5_4) |
a69281ff | 2231 | else if (nfds > 0 && keyboard_bit_set (&Available) |
dd2281ae | 2232 | && interrupt_input) |
e0109153 JB |
2233 | /* System sometimes fails to deliver SIGIO. |
2234 | ||
2235 | David J. Mackenzie says that Emacs doesn't compile under | |
2236 | Solaris if this code is enabled, thus the USG5_4 in the CPP | |
2237 | conditional. "I haven't noticed any ill effects so far. | |
2238 | If you find a Solaris expert somewhere, they might know | |
2239 | better." */ | |
d0d6b7c5 JB |
2240 | kill (getpid (), SIGIO); |
2241 | #endif | |
2242 | ||
2243 | /* Check for keyboard input */ | |
2244 | /* If there is any, return immediately | |
2245 | to give it higher priority than subprocesses */ | |
2246 | ||
f854a00b | 2247 | if ((XINT (read_kbd) != 0) |
5d6c2aa3 | 2248 | && detect_input_pending_run_timers (do_display)) |
6ed6233b KH |
2249 | { |
2250 | swallow_events (do_display); | |
5d6c2aa3 | 2251 | if (detect_input_pending_run_timers (do_display)) |
6ed6233b KH |
2252 | break; |
2253 | } | |
2254 | ||
f854a00b RS |
2255 | /* If wait_for_cell. check for keyboard input |
2256 | but don't run any timers. | |
2257 | ??? (It seems wrong to me to check for keyboard | |
2258 | input at all when wait_for_cell, but the code | |
2259 | has been this way since July 1994. | |
2260 | Try changing this after version 19.31.) */ | |
2261 | if (wait_for_cell | |
2262 | && detect_input_pending ()) | |
2263 | { | |
2264 | swallow_events (do_display); | |
2265 | if (detect_input_pending ()) | |
2266 | break; | |
2267 | } | |
2268 | ||
84aa3ace RS |
2269 | /* Exit now if the cell we're waiting for became non-nil. */ |
2270 | if (wait_for_cell && ! NILP (*wait_for_cell)) | |
2271 | break; | |
2272 | ||
4746118a | 2273 | #ifdef SIGIO |
d0d6b7c5 JB |
2274 | /* If we think we have keyboard input waiting, but didn't get SIGIO |
2275 | go read it. This can happen with X on BSD after logging out. | |
2276 | In that case, there really is no input and no SIGIO, | |
2277 | but select says there is input. */ | |
2278 | ||
dd2281ae | 2279 | if (XINT (read_kbd) && interrupt_input |
a69281ff | 2280 | && (keyboard_bit_set (&Available))) |
e643c5be | 2281 | kill (getpid (), SIGIO); |
4746118a | 2282 | #endif |
d0d6b7c5 | 2283 | |
d0d6b7c5 JB |
2284 | if (! wait_proc) |
2285 | got_some_input |= nfds > 0; | |
2286 | ||
32676c08 JB |
2287 | /* If checking input just got us a size-change event from X, |
2288 | obey it now if we should. */ | |
97f3b3d6 | 2289 | if (XINT (read_kbd) || wait_for_cell) |
32676c08 JB |
2290 | do_pending_window_change (); |
2291 | ||
a9f2c884 RS |
2292 | /* Check for data from a process. */ |
2293 | /* Really FIRST_PROC_DESC should be 0 on Unix, | |
2294 | but this is safer in the short run. */ | |
a69281ff | 2295 | for (channel = 0; channel <= max_process_desc; channel++) |
d0d6b7c5 | 2296 | { |
a69281ff RS |
2297 | if (FD_ISSET (channel, &Available) |
2298 | && FD_ISSET (channel, &non_keyboard_wait_mask)) | |
d0d6b7c5 JB |
2299 | { |
2300 | int nread; | |
2301 | ||
2302 | /* If waiting for this channel, arrange to return as | |
2303 | soon as no more input to be processed. No more | |
2304 | waiting. */ | |
2305 | if (wait_channel == channel) | |
2306 | { | |
a9f2c884 | 2307 | wait_channel = -1; |
d0d6b7c5 JB |
2308 | time_limit = -1; |
2309 | got_some_input = 1; | |
2310 | } | |
2311 | proc = chan_process[channel]; | |
2312 | if (NILP (proc)) | |
2313 | continue; | |
2314 | ||
d0d6b7c5 JB |
2315 | /* Read data from the process, starting with our |
2316 | buffered-ahead character if we have one. */ | |
2317 | ||
2318 | nread = read_process_output (proc, channel); | |
2319 | if (nread > 0) | |
2320 | { | |
2321 | /* Since read_process_output can run a filter, | |
2322 | which can call accept-process-output, | |
2323 | don't try to read from any other processes | |
2324 | before doing the select again. */ | |
2325 | FD_ZERO (&Available); | |
2326 | ||
2327 | if (do_display) | |
2328 | redisplay_preserve_echo_area (); | |
2329 | } | |
2330 | #ifdef EWOULDBLOCK | |
2331 | else if (nread == -1 && errno == EWOULDBLOCK) | |
2332 | ; | |
0b75e9a4 | 2333 | #endif |
d0d6b7c5 JB |
2334 | #ifdef O_NONBLOCK |
2335 | else if (nread == -1 && errno == EAGAIN) | |
2336 | ; | |
2337 | #else | |
2338 | #ifdef O_NDELAY | |
2339 | else if (nread == -1 && errno == EAGAIN) | |
2340 | ; | |
2341 | /* Note that we cannot distinguish between no input | |
2342 | available now and a closed pipe. | |
2343 | With luck, a closed pipe will be accompanied by | |
2344 | subprocess termination and SIGCHLD. */ | |
2345 | else if (nread == 0 && !NETCONN_P (proc)) | |
2346 | ; | |
ffd56f97 JB |
2347 | #endif /* O_NDELAY */ |
2348 | #endif /* O_NONBLOCK */ | |
d0d6b7c5 JB |
2349 | #ifdef HAVE_PTYS |
2350 | /* On some OSs with ptys, when the process on one end of | |
2351 | a pty exits, the other end gets an error reading with | |
2352 | errno = EIO instead of getting an EOF (0 bytes read). | |
2353 | Therefore, if we get an error reading and errno = | |
2354 | EIO, just continue, because the child process has | |
2355 | exited and should clean itself up soon (e.g. when we | |
2356 | get a SIGCHLD). */ | |
2357 | else if (nread == -1 && errno == EIO) | |
2358 | ; | |
ffd56f97 JB |
2359 | #endif /* HAVE_PTYS */ |
2360 | /* If we can detect process termination, don't consider the process | |
2361 | gone just because its pipe is closed. */ | |
d0d6b7c5 JB |
2362 | #ifdef SIGCHLD |
2363 | else if (nread == 0 && !NETCONN_P (proc)) | |
2364 | ; | |
2365 | #endif | |
2366 | else | |
2367 | { | |
2368 | /* Preserve status of processes already terminated. */ | |
2369 | XSETINT (XPROCESS (proc)->tick, ++process_tick); | |
2370 | deactivate_process (proc); | |
2371 | if (!NILP (XPROCESS (proc)->raw_status_low)) | |
2372 | update_status (XPROCESS (proc)); | |
2373 | if (EQ (XPROCESS (proc)->status, Qrun)) | |
2374 | XPROCESS (proc)->status | |
2375 | = Fcons (Qexit, Fcons (make_number (256), Qnil)); | |
2376 | } | |
2377 | } | |
ffd56f97 JB |
2378 | } /* end for each file descriptor */ |
2379 | } /* end while exit conditions not met */ | |
d0d6b7c5 | 2380 | |
d430ee71 RS |
2381 | waiting_for_user_input_p = 0; |
2382 | ||
ffd56f97 JB |
2383 | /* If calling from keyboard input, do not quit |
2384 | since we want to return C-g as an input character. | |
2385 | Otherwise, do pending quit if requested. */ | |
f76475ad | 2386 | if (XINT (read_kbd) >= 0) |
ffd56f97 JB |
2387 | { |
2388 | /* Prevent input_pending from remaining set if we quit. */ | |
2389 | clear_input_pending (); | |
2390 | QUIT; | |
2391 | } | |
d0d6b7c5 JB |
2392 | |
2393 | return got_some_input; | |
2394 | } | |
2395 | \f | |
3b9a3dfa RS |
2396 | /* Given a list (FUNCTION ARGS...), apply FUNCTION to the ARGS. */ |
2397 | ||
2398 | static Lisp_Object | |
2399 | read_process_output_call (fun_and_args) | |
2400 | Lisp_Object fun_and_args; | |
2401 | { | |
2402 | return apply1 (XCONS (fun_and_args)->car, XCONS (fun_and_args)->cdr); | |
2403 | } | |
2404 | ||
2405 | static Lisp_Object | |
2406 | read_process_output_error_handler (error) | |
2407 | Lisp_Object error; | |
2408 | { | |
2409 | cmd_error_internal (error, "error in process filter: "); | |
2410 | Vinhibit_quit = Qt; | |
2411 | update_echo_area (); | |
833ba342 | 2412 | Fsleep_for (make_number (2), Qnil); |
3b9a3dfa RS |
2413 | } |
2414 | ||
d0d6b7c5 JB |
2415 | /* Read pending output from the process channel, |
2416 | starting with our buffered-ahead character if we have one. | |
2417 | Yield number of characters read. | |
2418 | ||
2419 | This function reads at most 1024 characters. | |
2420 | If you want to read all available subprocess output, | |
2421 | you must call it repeatedly until it returns zero. */ | |
2422 | ||
2423 | read_process_output (proc, channel) | |
2424 | Lisp_Object proc; | |
2425 | register int channel; | |
2426 | { | |
2427 | register int nchars; | |
2428 | #ifdef VMS | |
2429 | char *chars; | |
2430 | #else | |
2431 | char chars[1024]; | |
2432 | #endif | |
2433 | register Lisp_Object outstream; | |
2434 | register struct buffer *old = current_buffer; | |
2435 | register struct Lisp_Process *p = XPROCESS (proc); | |
2436 | register int opoint; | |
2437 | ||
2438 | #ifdef VMS | |
2439 | VMS_PROC_STUFF *vs, *get_vms_process_pointer(); | |
2440 | ||
2441 | vs = get_vms_process_pointer (p->pid); | |
2442 | if (vs) | |
2443 | { | |
2444 | if (!vs->iosb[0]) | |
2445 | return(0); /* Really weird if it does this */ | |
2446 | if (!(vs->iosb[0] & 1)) | |
2447 | return -1; /* I/O error */ | |
2448 | } | |
2449 | else | |
2450 | error ("Could not get VMS process pointer"); | |
2451 | chars = vs->inputBuffer; | |
2452 | nchars = clean_vms_buffer (chars, vs->iosb[1]); | |
2453 | if (nchars <= 0) | |
2454 | { | |
2455 | start_vms_process_read (vs); /* Crank up the next read on the process */ | |
2456 | return 1; /* Nothing worth printing, say we got 1 */ | |
2457 | } | |
2458 | #else /* not VMS */ | |
2459 | ||
2460 | if (proc_buffered_char[channel] < 0) | |
7795ff9b | 2461 | nchars = read (channel, chars, sizeof (chars)); |
d0d6b7c5 JB |
2462 | else |
2463 | { | |
2464 | chars[0] = proc_buffered_char[channel]; | |
2465 | proc_buffered_char[channel] = -1; | |
7795ff9b | 2466 | nchars = read (channel, chars + 1, sizeof (chars) - 1); |
d0d6b7c5 JB |
2467 | if (nchars < 0) |
2468 | nchars = 1; | |
2469 | else | |
2470 | nchars = nchars + 1; | |
2471 | } | |
2472 | #endif /* not VMS */ | |
2473 | ||
2474 | if (nchars <= 0) return nchars; | |
2475 | ||
2476 | outstream = p->filter; | |
2477 | if (!NILP (outstream)) | |
2478 | { | |
2479 | /* We inhibit quit here instead of just catching it so that | |
2480 | hitting ^G when a filter happens to be running won't screw | |
2481 | it up. */ | |
2482 | int count = specpdl_ptr - specpdl; | |
30c78175 | 2483 | Lisp_Object odeactivate; |
dfc21838 | 2484 | Lisp_Object obuffer, okeymap; |
30c78175 | 2485 | |
dfc21838 RS |
2486 | /* No need to gcpro these, because all we do with them later |
2487 | is test them for EQness, and none of them should be a string. */ | |
30c78175 | 2488 | odeactivate = Vdeactivate_mark; |
dfc21838 RS |
2489 | XSETBUFFER (obuffer, current_buffer); |
2490 | okeymap = current_buffer->keymap; | |
30c78175 | 2491 | |
d0d6b7c5 | 2492 | specbind (Qinhibit_quit, Qt); |
6545aada | 2493 | specbind (Qlast_nonmenu_event, Qt); |
3b9a3dfa | 2494 | |
7074fde6 | 2495 | running_asynch_code = 1; |
3b9a3dfa RS |
2496 | internal_condition_case_1 (read_process_output_call, |
2497 | Fcons (outstream, | |
2498 | Fcons (proc, | |
7074fde6 FP |
2499 | Fcons (make_string (chars, |
2500 | nchars), | |
3b9a3dfa RS |
2501 | Qnil))), |
2502 | !NILP (Vdebug_on_error) ? Qnil : Qerror, | |
2503 | read_process_output_error_handler); | |
7074fde6 FP |
2504 | running_asynch_code = 0; |
2505 | restore_match_data (); | |
d0d6b7c5 | 2506 | |
592ce97f | 2507 | /* Handling the process output should not deactivate the mark. */ |
30c78175 RS |
2508 | Vdeactivate_mark = odeactivate; |
2509 | ||
7973cfa8 RS |
2510 | #if 0 /* Call record_asynch_buffer_change unconditionally, |
2511 | because we might have changed minor modes or other things | |
2512 | that affect key bindings. */ | |
dfc21838 RS |
2513 | if (! EQ (Fcurrent_buffer (), obuffer) |
2514 | || ! EQ (current_buffer->keymap, okeymap)) | |
7973cfa8 | 2515 | #endif |
927e08be RS |
2516 | /* But do it only if the caller is actually going to read events. |
2517 | Otherwise there's no need to make him wake up, and it could | |
2518 | cause trouble (for example it would make Fsit_for return). */ | |
2519 | if (waiting_for_user_input_p == -1) | |
2520 | record_asynch_buffer_change (); | |
d72534ba | 2521 | |
d0d6b7c5 JB |
2522 | #ifdef VMS |
2523 | start_vms_process_read (vs); | |
2524 | #endif | |
2ea6d561 | 2525 | unbind_to (count, Qnil); |
d0d6b7c5 JB |
2526 | return nchars; |
2527 | } | |
2528 | ||
2529 | /* If no filter, write into buffer if it isn't dead. */ | |
2530 | if (!NILP (p->buffer) && !NILP (XBUFFER (p->buffer)->name)) | |
2531 | { | |
b0310da4 JB |
2532 | Lisp_Object old_read_only; |
2533 | Lisp_Object old_begv, old_zv; | |
30c78175 RS |
2534 | Lisp_Object odeactivate; |
2535 | ||
2536 | odeactivate = Vdeactivate_mark; | |
d0d6b7c5 JB |
2537 | |
2538 | Fset_buffer (p->buffer); | |
2539 | opoint = point; | |
b0310da4 | 2540 | old_read_only = current_buffer->read_only; |
22719df2 KH |
2541 | XSETFASTINT (old_begv, BEGV); |
2542 | XSETFASTINT (old_zv, ZV); | |
b0310da4 JB |
2543 | |
2544 | current_buffer->read_only = Qnil; | |
d0d6b7c5 JB |
2545 | |
2546 | /* Insert new output into buffer | |
2547 | at the current end-of-output marker, | |
2548 | thus preserving logical ordering of input and output. */ | |
2549 | if (XMARKER (p->mark)->buffer) | |
53aad33f | 2550 | SET_PT (clip_to_bounds (BEGV, marker_position (p->mark), ZV)); |
d0d6b7c5 JB |
2551 | else |
2552 | SET_PT (ZV); | |
b0310da4 JB |
2553 | |
2554 | /* If the output marker is outside of the visible region, save | |
2555 | the restriction and widen. */ | |
2556 | if (! (BEGV <= point && point <= ZV)) | |
2557 | Fwiden (); | |
2558 | ||
2559 | /* Make sure opoint floats ahead of any new text, just as point | |
2560 | would. */ | |
d0d6b7c5 JB |
2561 | if (point <= opoint) |
2562 | opoint += nchars; | |
2563 | ||
b0310da4 JB |
2564 | /* Insert after old_begv, but before old_zv. */ |
2565 | if (point < XFASTINT (old_begv)) | |
7c6f34f0 | 2566 | XSETFASTINT (old_begv, XFASTINT (old_begv) + nchars); |
b0310da4 | 2567 | if (point <= XFASTINT (old_zv)) |
7c6f34f0 | 2568 | XSETFASTINT (old_zv, XFASTINT (old_zv) + nchars); |
b0310da4 | 2569 | |
d0d6b7c5 JB |
2570 | /* Insert before markers in case we are inserting where |
2571 | the buffer's mark is, and the user's next command is Meta-y. */ | |
2572 | insert_before_markers (chars, nchars); | |
d0d6b7c5 | 2573 | Fset_marker (p->mark, make_number (point), p->buffer); |
b0310da4 | 2574 | |
d0d6b7c5 JB |
2575 | update_mode_lines++; |
2576 | ||
b0310da4 JB |
2577 | /* If the restriction isn't what it should be, set it. */ |
2578 | if (XFASTINT (old_begv) != BEGV || XFASTINT (old_zv) != ZV) | |
2579 | Fnarrow_to_region (old_begv, old_zv); | |
2580 | ||
592ce97f | 2581 | /* Handling the process output should not deactivate the mark. */ |
30c78175 RS |
2582 | Vdeactivate_mark = odeactivate; |
2583 | ||
b0310da4 | 2584 | current_buffer->read_only = old_read_only; |
d0d6b7c5 JB |
2585 | SET_PT (opoint); |
2586 | set_buffer_internal (old); | |
2587 | } | |
2588 | #ifdef VMS | |
2589 | start_vms_process_read (vs); | |
2590 | #endif | |
2591 | return nchars; | |
2592 | } | |
2593 | ||
2594 | DEFUN ("waiting-for-user-input-p", Fwaiting_for_user_input_p, Swaiting_for_user_input_p, | |
2595 | 0, 0, 0, | |
8b4d685f | 2596 | "Returns non-nil if emacs is waiting for input from the user.\n\ |
d0d6b7c5 JB |
2597 | This is intended for use by asynchronous process output filters and sentinels.") |
2598 | () | |
2599 | { | |
8b4d685f | 2600 | return (waiting_for_user_input_p ? Qt : Qnil); |
d0d6b7c5 JB |
2601 | } |
2602 | \f | |
2603 | /* Sending data to subprocess */ | |
2604 | ||
2605 | jmp_buf send_process_frame; | |
2606 | ||
2607 | SIGTYPE | |
2608 | send_process_trap () | |
2609 | { | |
2610 | #ifdef BSD4_1 | |
2611 | sigrelse (SIGPIPE); | |
2612 | sigrelse (SIGALRM); | |
2613 | #endif /* BSD4_1 */ | |
2614 | longjmp (send_process_frame, 1); | |
2615 | } | |
2616 | ||
4556b700 RS |
2617 | /* Send some data to process PROC. |
2618 | BUF is the beginning of the data; LEN is the number of characters. | |
2619 | OBJECT is the Lisp object that the data comes from. */ | |
2620 | ||
2621 | send_process (proc, buf, len, object) | |
ecd1f654 | 2622 | volatile Lisp_Object proc; |
d0d6b7c5 JB |
2623 | char *buf; |
2624 | int len; | |
4556b700 | 2625 | Lisp_Object object; |
d0d6b7c5 | 2626 | { |
ecd1f654 | 2627 | /* Use volatile to protect variables from being clobbered by longjmp. */ |
d0d6b7c5 | 2628 | int rv; |
ecd1f654 | 2629 | volatile unsigned char *procname = XSTRING (XPROCESS (proc)->name)->data; |
d0d6b7c5 | 2630 | |
d0d6b7c5 JB |
2631 | #ifdef VMS |
2632 | struct Lisp_Process *p = XPROCESS (proc); | |
2633 | VMS_PROC_STUFF *vs, *get_vms_process_pointer(); | |
2634 | #endif /* VMS */ | |
2635 | ||
2636 | if (! NILP (XPROCESS (proc)->raw_status_low)) | |
2637 | update_status (XPROCESS (proc)); | |
2638 | if (! EQ (XPROCESS (proc)->status, Qrun)) | |
2639 | error ("Process %s not running", procname); | |
2640 | ||
2641 | #ifdef VMS | |
2642 | vs = get_vms_process_pointer (p->pid); | |
2643 | if (vs == 0) | |
2644 | error ("Could not find this process: %x", p->pid); | |
2645 | else if (write_to_vms_process (vs, buf, len)) | |
2646 | ; | |
2647 | #else | |
4556b700 RS |
2648 | |
2649 | if (pty_max_bytes == 0) | |
2650 | { | |
2651 | #if defined (HAVE_FPATHCONF) && defined (_PC_MAX_CANON) | |
2652 | pty_max_bytes = fpathconf (XFASTINT (XPROCESS (proc)->outfd), | |
2653 | _PC_MAX_CANON); | |
2654 | if (pty_max_bytes < 0) | |
2655 | pty_max_bytes = 250; | |
2656 | #else | |
2657 | pty_max_bytes = 250; | |
2658 | #endif | |
2659 | /* Deduct one, to leave space for the eof. */ | |
2660 | pty_max_bytes--; | |
2661 | } | |
2662 | ||
d0d6b7c5 JB |
2663 | if (!setjmp (send_process_frame)) |
2664 | while (len > 0) | |
2665 | { | |
2666 | int this = len; | |
4746118a | 2667 | SIGTYPE (*old_sigpipe)(); |
93b4f699 RS |
2668 | int flush_pty = 0; |
2669 | ||
4556b700 RS |
2670 | /* Decide how much data we can send in one batch. |
2671 | Long lines need to be split into multiple batches. */ | |
2672 | if (!NILP (XPROCESS (proc)->pty_flag)) | |
93b4f699 | 2673 | { |
4556b700 RS |
2674 | /* Starting this at zero is always correct when not the first iteration |
2675 | because the previous iteration ended by sending C-d. | |
2676 | It may not be correct for the first iteration | |
2677 | if a partial line was sent in a separate send_process call. | |
2678 | If that proves worth handling, we need to save linepos | |
2679 | in the process object. */ | |
2680 | int linepos = 0; | |
2681 | char *ptr = buf; | |
2682 | char *end = buf + len; | |
2683 | ||
2684 | /* Scan through this text for a line that is too long. */ | |
2685 | while (ptr != end && linepos < pty_max_bytes) | |
2686 | { | |
2687 | if (*ptr == '\n') | |
2688 | linepos = 0; | |
2689 | else | |
2690 | linepos++; | |
2691 | ptr++; | |
2692 | } | |
2693 | /* If we found one, break the line there | |
2694 | and put in a C-d to force the buffer through. */ | |
2695 | this = ptr - buf; | |
93b4f699 RS |
2696 | } |
2697 | ||
4556b700 RS |
2698 | /* Send this batch, using one or more write calls. */ |
2699 | while (this > 0) | |
d0d6b7c5 | 2700 | { |
4556b700 RS |
2701 | old_sigpipe = (SIGTYPE (*) ()) signal (SIGPIPE, send_process_trap); |
2702 | rv = write (XINT (XPROCESS (proc)->outfd), buf, this); | |
2703 | signal (SIGPIPE, old_sigpipe); | |
2704 | ||
2705 | if (rv < 0) | |
2706 | { | |
2707 | if (0 | |
d0d6b7c5 | 2708 | #ifdef EWOULDBLOCK |
4556b700 | 2709 | || errno == EWOULDBLOCK |
d0d6b7c5 JB |
2710 | #endif |
2711 | #ifdef EAGAIN | |
4556b700 | 2712 | || errno == EAGAIN |
d0d6b7c5 | 2713 | #endif |
4556b700 RS |
2714 | ) |
2715 | /* Buffer is full. Wait, accepting input; | |
2716 | that may allow the program | |
2717 | to finish doing output and read more. */ | |
2718 | { | |
2719 | Lisp_Object zero; | |
2720 | int offset; | |
2721 | ||
2722 | /* Running filters might relocate buffers or strings. | |
2723 | Arrange to relocate BUF. */ | |
2724 | if (BUFFERP (object)) | |
2725 | offset = BUF_PTR_CHAR_POS (XBUFFER (object), | |
2726 | (unsigned char *) buf); | |
2727 | else if (STRINGP (object)) | |
2728 | offset = buf - (char *) XSTRING (object)->data; | |
2729 | ||
22719df2 | 2730 | XSETFASTINT (zero, 0); |
4556b700 RS |
2731 | wait_reading_process_input (1, 0, zero, 0); |
2732 | ||
2733 | if (BUFFERP (object)) | |
2734 | buf = (char *) BUF_CHAR_ADDRESS (XBUFFER (object), offset); | |
2735 | else if (STRINGP (object)) | |
2736 | buf = offset + (char *) XSTRING (object)->data; | |
2737 | ||
2738 | rv = 0; | |
2739 | } | |
2740 | else | |
2741 | /* This is a real error. */ | |
2742 | report_file_error ("writing to process", Fcons (proc, Qnil)); | |
d0d6b7c5 | 2743 | } |
4556b700 RS |
2744 | buf += rv; |
2745 | len -= rv; | |
2746 | this -= rv; | |
d0d6b7c5 | 2747 | } |
f76475ad | 2748 | |
4556b700 RS |
2749 | /* If we sent just part of the string, put in an EOF |
2750 | to force it through, before we send the rest. */ | |
2751 | if (len > 0) | |
2752 | Fprocess_send_eof (proc); | |
d0d6b7c5 JB |
2753 | } |
2754 | #endif | |
2755 | else | |
2756 | { | |
2757 | XPROCESS (proc)->raw_status_low = Qnil; | |
2758 | XPROCESS (proc)->raw_status_high = Qnil; | |
2759 | XPROCESS (proc)->status = Fcons (Qexit, Fcons (make_number (256), Qnil)); | |
2760 | XSETINT (XPROCESS (proc)->tick, ++process_tick); | |
2761 | deactivate_process (proc); | |
2762 | #ifdef VMS | |
2763 | error ("Error writing to process %s; closed it", procname); | |
2764 | #else | |
2765 | error ("SIGPIPE raised on process %s; closed it", procname); | |
2766 | #endif | |
2767 | } | |
2768 | } | |
2769 | ||
2770 | DEFUN ("process-send-region", Fprocess_send_region, Sprocess_send_region, | |
2771 | 3, 3, 0, | |
2772 | "Send current contents of region as input to PROCESS.\n\ | |
ebb9e16f JB |
2773 | PROCESS may be a process, a buffer, the name of a process or buffer, or\n\ |
2774 | nil, indicating the current buffer's process.\n\ | |
d0d6b7c5 JB |
2775 | Called from program, takes three arguments, PROCESS, START and END.\n\ |
2776 | If the region is more than 500 characters long,\n\ | |
2777 | it is sent in several bunches. This may happen even for shorter regions.\n\ | |
2778 | Output from processes can arrive in between bunches.") | |
2779 | (process, start, end) | |
2780 | Lisp_Object process, start, end; | |
2781 | { | |
2782 | Lisp_Object proc; | |
2783 | int start1; | |
2784 | ||
2785 | proc = get_process (process); | |
2786 | validate_region (&start, &end); | |
2787 | ||
2788 | if (XINT (start) < GPT && XINT (end) > GPT) | |
2789 | move_gap (start); | |
2790 | ||
2791 | start1 = XINT (start); | |
4556b700 RS |
2792 | send_process (proc, &FETCH_CHAR (start1), XINT (end) - XINT (start), |
2793 | Fcurrent_buffer ()); | |
d0d6b7c5 JB |
2794 | |
2795 | return Qnil; | |
2796 | } | |
2797 | ||
2798 | DEFUN ("process-send-string", Fprocess_send_string, Sprocess_send_string, | |
2799 | 2, 2, 0, | |
2800 | "Send PROCESS the contents of STRING as input.\n\ | |
ebb9e16f JB |
2801 | PROCESS may be a process, a buffer, the name of a process or buffer, or\n\ |
2802 | nil, indicating the current buffer's process.\n\ | |
d0d6b7c5 JB |
2803 | If STRING is more than 500 characters long,\n\ |
2804 | it is sent in several bunches. This may happen even for shorter strings.\n\ | |
2805 | Output from processes can arrive in between bunches.") | |
2806 | (process, string) | |
2807 | Lisp_Object process, string; | |
2808 | { | |
2809 | Lisp_Object proc; | |
2810 | CHECK_STRING (string, 1); | |
2811 | proc = get_process (process); | |
4556b700 | 2812 | send_process (proc, XSTRING (string)->data, XSTRING (string)->size, string); |
d0d6b7c5 JB |
2813 | return Qnil; |
2814 | } | |
2815 | \f | |
2816 | /* send a signal number SIGNO to PROCESS. | |
2817 | CURRENT_GROUP means send to the process group that currently owns | |
2818 | the terminal being used to communicate with PROCESS. | |
2819 | This is used for various commands in shell mode. | |
2820 | If NOMSG is zero, insert signal-announcements into process's buffers | |
b0310da4 JB |
2821 | right away. |
2822 | ||
2823 | If we can, we try to signal PROCESS by sending control characters | |
e333e864 | 2824 | down the pty. This allows us to signal inferiors who have changed |
b0310da4 | 2825 | their uid, for which killpg would return an EPERM error. */ |
d0d6b7c5 | 2826 | |
f9738840 | 2827 | static void |
d0d6b7c5 JB |
2828 | process_send_signal (process, signo, current_group, nomsg) |
2829 | Lisp_Object process; | |
2830 | int signo; | |
2831 | Lisp_Object current_group; | |
2832 | int nomsg; | |
2833 | { | |
2834 | Lisp_Object proc; | |
2835 | register struct Lisp_Process *p; | |
2836 | int gid; | |
2837 | int no_pgrp = 0; | |
2838 | ||
2839 | proc = get_process (process); | |
2840 | p = XPROCESS (proc); | |
2841 | ||
2842 | if (!EQ (p->childp, Qt)) | |
2843 | error ("Process %s is not a subprocess", | |
2844 | XSTRING (p->name)->data); | |
a9f2c884 | 2845 | if (XINT (p->infd) < 0) |
d0d6b7c5 JB |
2846 | error ("Process %s is not active", |
2847 | XSTRING (p->name)->data); | |
2848 | ||
2849 | if (NILP (p->pty_flag)) | |
2850 | current_group = Qnil; | |
2851 | ||
d0d6b7c5 JB |
2852 | /* If we are using pgrps, get a pgrp number and make it negative. */ |
2853 | if (!NILP (current_group)) | |
2854 | { | |
b0310da4 | 2855 | #ifdef SIGNALS_VIA_CHARACTERS |
d0d6b7c5 JB |
2856 | /* If possible, send signals to the entire pgrp |
2857 | by sending an input character to it. */ | |
b0310da4 | 2858 | |
6be429b1 JB |
2859 | /* TERMIOS is the latest and bestest, and seems most likely to |
2860 | work. If the system has it, use it. */ | |
2861 | #ifdef HAVE_TERMIOS | |
2862 | struct termios t; | |
2863 | ||
2864 | switch (signo) | |
2865 | { | |
2866 | case SIGINT: | |
a9f2c884 | 2867 | tcgetattr (XINT (p->infd), &t); |
4556b700 | 2868 | send_process (proc, &t.c_cc[VINTR], 1, Qnil); |
a87b802f | 2869 | return; |
6be429b1 JB |
2870 | |
2871 | case SIGQUIT: | |
a9f2c884 | 2872 | tcgetattr (XINT (p->infd), &t); |
4556b700 | 2873 | send_process (proc, &t.c_cc[VQUIT], 1, Qnil); |
a87b802f | 2874 | return; |
6be429b1 JB |
2875 | |
2876 | case SIGTSTP: | |
a9f2c884 | 2877 | tcgetattr (XINT (p->infd), &t); |
d0adf46f | 2878 | #if defined (VSWTCH) && !defined (PREFER_VSUSP) |
4556b700 | 2879 | send_process (proc, &t.c_cc[VSWTCH], 1, Qnil); |
6be429b1 | 2880 | #else |
4556b700 | 2881 | send_process (proc, &t.c_cc[VSUSP], 1, Qnil); |
6be429b1 | 2882 | #endif |
a87b802f | 2883 | return; |
6be429b1 JB |
2884 | } |
2885 | ||
2886 | #else /* ! HAVE_TERMIOS */ | |
2887 | ||
b0310da4 JB |
2888 | /* On Berkeley descendants, the following IOCTL's retrieve the |
2889 | current control characters. */ | |
d0d6b7c5 | 2890 | #if defined (TIOCGLTC) && defined (TIOCGETC) |
b0310da4 | 2891 | |
d0d6b7c5 JB |
2892 | struct tchars c; |
2893 | struct ltchars lc; | |
2894 | ||
2895 | switch (signo) | |
2896 | { | |
2897 | case SIGINT: | |
a9f2c884 | 2898 | ioctl (XINT (p->infd), TIOCGETC, &c); |
4556b700 | 2899 | send_process (proc, &c.t_intrc, 1, Qnil); |
f9738840 | 2900 | return; |
d0d6b7c5 | 2901 | case SIGQUIT: |
a9f2c884 | 2902 | ioctl (XINT (p->infd), TIOCGETC, &c); |
4556b700 | 2903 | send_process (proc, &c.t_quitc, 1, Qnil); |
f9738840 | 2904 | return; |
0ad77c54 | 2905 | #ifdef SIGTSTP |
d0d6b7c5 | 2906 | case SIGTSTP: |
a9f2c884 | 2907 | ioctl (XINT (p->infd), TIOCGLTC, &lc); |
4556b700 | 2908 | send_process (proc, &lc.t_suspc, 1, Qnil); |
f9738840 | 2909 | return; |
b0310da4 | 2910 | #endif /* ! defined (SIGTSTP) */ |
d0d6b7c5 | 2911 | } |
b0310da4 JB |
2912 | |
2913 | #else /* ! defined (TIOCGLTC) && defined (TIOCGETC) */ | |
2914 | ||
2915 | /* On SYSV descendants, the TCGETA ioctl retrieves the current control | |
2916 | characters. */ | |
2917 | #ifdef TCGETA | |
d0d6b7c5 JB |
2918 | struct termio t; |
2919 | switch (signo) | |
2920 | { | |
2921 | case SIGINT: | |
a9f2c884 | 2922 | ioctl (XINT (p->infd), TCGETA, &t); |
4556b700 | 2923 | send_process (proc, &t.c_cc[VINTR], 1, Qnil); |
f9738840 | 2924 | return; |
d0d6b7c5 | 2925 | case SIGQUIT: |
a9f2c884 | 2926 | ioctl (XINT (p->infd), TCGETA, &t); |
4556b700 | 2927 | send_process (proc, &t.c_cc[VQUIT], 1, Qnil); |
f9738840 | 2928 | return; |
7d79e3b4 | 2929 | #ifdef SIGTSTP |
d0d6b7c5 | 2930 | case SIGTSTP: |
a9f2c884 | 2931 | ioctl (XINT (p->infd), TCGETA, &t); |
4556b700 | 2932 | send_process (proc, &t.c_cc[VSWTCH], 1, Qnil); |
f9738840 | 2933 | return; |
b0310da4 | 2934 | #endif /* ! defined (SIGTSTP) */ |
d0d6b7c5 | 2935 | } |
b0310da4 JB |
2936 | #else /* ! defined (TCGETA) */ |
2937 | Your configuration files are messed up. | |
2938 | /* If your system configuration files define SIGNALS_VIA_CHARACTERS, | |
2939 | you'd better be using one of the alternatives above! */ | |
2940 | #endif /* ! defined (TCGETA) */ | |
2941 | #endif /* ! defined (TIOCGLTC) && defined (TIOCGETC) */ | |
6be429b1 | 2942 | #endif /* ! defined HAVE_TERMIOS */ |
b0310da4 | 2943 | #endif /* ! defined (SIGNALS_VIA_CHARACTERS) */ |
d0d6b7c5 | 2944 | |
301c3fe4 | 2945 | #ifdef TIOCGPGRP |
d0d6b7c5 JB |
2946 | /* Get the pgrp using the tty itself, if we have that. |
2947 | Otherwise, use the pty to get the pgrp. | |
2948 | On pfa systems, saka@pfu.fujitsu.co.JP writes: | |
b0310da4 JB |
2949 | "TIOCGPGRP symbol defined in sys/ioctl.h at E50. |
2950 | But, TIOCGPGRP does not work on E50 ;-P works fine on E60" | |
d0d6b7c5 JB |
2951 | His patch indicates that if TIOCGPGRP returns an error, then |
2952 | we should just assume that p->pid is also the process group id. */ | |
2953 | { | |
2954 | int err; | |
2955 | ||
2956 | if (!NILP (p->subtty)) | |
2957 | err = ioctl (XFASTINT (p->subtty), TIOCGPGRP, &gid); | |
2958 | else | |
a9f2c884 | 2959 | err = ioctl (XINT (p->infd), TIOCGPGRP, &gid); |
d0d6b7c5 JB |
2960 | |
2961 | #ifdef pfa | |
2962 | if (err == -1) | |
2963 | gid = - XFASTINT (p->pid); | |
301c3fe4 | 2964 | #endif /* ! defined (pfa) */ |
d0d6b7c5 JB |
2965 | } |
2966 | if (gid == -1) | |
2967 | no_pgrp = 1; | |
2968 | else | |
2969 | gid = - gid; | |
b0310da4 | 2970 | #else /* ! defined (TIOCGPGRP ) */ |
301c3fe4 JB |
2971 | /* Can't select pgrps on this system, so we know that |
2972 | the child itself heads the pgrp. */ | |
2973 | gid = - XFASTINT (p->pid); | |
2974 | #endif /* ! defined (TIOCGPGRP ) */ | |
d0d6b7c5 JB |
2975 | } |
2976 | else | |
2977 | gid = - XFASTINT (p->pid); | |
d0d6b7c5 JB |
2978 | |
2979 | switch (signo) | |
2980 | { | |
2981 | #ifdef SIGCONT | |
2982 | case SIGCONT: | |
2983 | p->raw_status_low = Qnil; | |
2984 | p->raw_status_high = Qnil; | |
2985 | p->status = Qrun; | |
2986 | XSETINT (p->tick, ++process_tick); | |
2987 | if (!nomsg) | |
2988 | status_notify (); | |
2989 | break; | |
301c3fe4 | 2990 | #endif /* ! defined (SIGCONT) */ |
d0d6b7c5 JB |
2991 | case SIGINT: |
2992 | #ifdef VMS | |
4556b700 | 2993 | send_process (proc, "\003", 1, Qnil); /* ^C */ |
d0d6b7c5 JB |
2994 | goto whoosh; |
2995 | #endif | |
2996 | case SIGQUIT: | |
2997 | #ifdef VMS | |
4556b700 | 2998 | send_process (proc, "\031", 1, Qnil); /* ^Y */ |
d0d6b7c5 JB |
2999 | goto whoosh; |
3000 | #endif | |
3001 | case SIGKILL: | |
3002 | #ifdef VMS | |
3003 | sys$forcex (&(XFASTINT (p->pid)), 0, 1); | |
3004 | whoosh: | |
3005 | #endif | |
a9f2c884 | 3006 | flush_pending_output (XINT (p->infd)); |
d0d6b7c5 JB |
3007 | break; |
3008 | } | |
3009 | ||
3010 | /* If we don't have process groups, send the signal to the immediate | |
3011 | subprocess. That isn't really right, but it's better than any | |
3012 | obvious alternative. */ | |
3013 | if (no_pgrp) | |
3014 | { | |
3015 | kill (XFASTINT (p->pid), signo); | |
3016 | return; | |
3017 | } | |
3018 | ||
3019 | /* gid may be a pid, or minus a pgrp's number */ | |
3020 | #ifdef TIOCSIGSEND | |
3021 | if (!NILP (current_group)) | |
a9f2c884 | 3022 | ioctl (XINT (p->infd), TIOCSIGSEND, signo); |
d0d6b7c5 JB |
3023 | else |
3024 | { | |
3025 | gid = - XFASTINT (p->pid); | |
3026 | kill (gid, signo); | |
3027 | } | |
301c3fe4 | 3028 | #else /* ! defined (TIOCSIGSEND) */ |
d0d6b7c5 | 3029 | EMACS_KILLPG (-gid, signo); |
301c3fe4 | 3030 | #endif /* ! defined (TIOCSIGSEND) */ |
d0d6b7c5 JB |
3031 | } |
3032 | ||
3033 | DEFUN ("interrupt-process", Finterrupt_process, Sinterrupt_process, 0, 2, 0, | |
3034 | "Interrupt process PROCESS. May be process or name of one.\n\ | |
ebb9e16f | 3035 | PROCESS may be a process, a buffer, or the name of a process or buffer.\n\ |
e333e864 | 3036 | nil or no arg means current buffer's process.\n\ |
d0d6b7c5 JB |
3037 | Second arg CURRENT-GROUP non-nil means send signal to\n\ |
3038 | the current process-group of the process's controlling terminal\n\ | |
3039 | rather than to the process's own process group.\n\ | |
3040 | If the process is a shell, this means interrupt current subjob\n\ | |
3041 | rather than the shell.") | |
3042 | (process, current_group) | |
3043 | Lisp_Object process, current_group; | |
3044 | { | |
3045 | process_send_signal (process, SIGINT, current_group, 0); | |
3046 | return process; | |
3047 | } | |
3048 | ||
3049 | DEFUN ("kill-process", Fkill_process, Skill_process, 0, 2, 0, | |
3050 | "Kill process PROCESS. May be process or name of one.\n\ | |
3051 | See function `interrupt-process' for more details on usage.") | |
3052 | (process, current_group) | |
3053 | Lisp_Object process, current_group; | |
3054 | { | |
3055 | process_send_signal (process, SIGKILL, current_group, 0); | |
3056 | return process; | |
3057 | } | |
3058 | ||
3059 | DEFUN ("quit-process", Fquit_process, Squit_process, 0, 2, 0, | |
3060 | "Send QUIT signal to process PROCESS. May be process or name of one.\n\ | |
3061 | See function `interrupt-process' for more details on usage.") | |
3062 | (process, current_group) | |
3063 | Lisp_Object process, current_group; | |
3064 | { | |
3065 | process_send_signal (process, SIGQUIT, current_group, 0); | |
3066 | return process; | |
3067 | } | |
3068 | ||
3069 | DEFUN ("stop-process", Fstop_process, Sstop_process, 0, 2, 0, | |
3070 | "Stop process PROCESS. May be process or name of one.\n\ | |
3071 | See function `interrupt-process' for more details on usage.") | |
3072 | (process, current_group) | |
3073 | Lisp_Object process, current_group; | |
3074 | { | |
3075 | #ifndef SIGTSTP | |
3076 | error ("no SIGTSTP support"); | |
3077 | #else | |
3078 | process_send_signal (process, SIGTSTP, current_group, 0); | |
3079 | #endif | |
3080 | return process; | |
3081 | } | |
3082 | ||
3083 | DEFUN ("continue-process", Fcontinue_process, Scontinue_process, 0, 2, 0, | |
3084 | "Continue process PROCESS. May be process or name of one.\n\ | |
3085 | See function `interrupt-process' for more details on usage.") | |
3086 | (process, current_group) | |
3087 | Lisp_Object process, current_group; | |
3088 | { | |
3089 | #ifdef SIGCONT | |
3090 | process_send_signal (process, SIGCONT, current_group, 0); | |
3091 | #else | |
3092 | error ("no SIGCONT support"); | |
3093 | #endif | |
3094 | return process; | |
3095 | } | |
3096 | ||
3097 | DEFUN ("signal-process", Fsignal_process, Ssignal_process, | |
3098 | 2, 2, "nProcess number: \nnSignal code: ", | |
4766242d RS |
3099 | "Send the process with process id PID the signal with code SIGCODE.\n\ |
3100 | PID must be an integer. The process need not be a child of this Emacs.\n\ | |
3101 | SIGCODE may be an integer, or a symbol whose name is a signal name.") | |
3102 | (pid, sigcode) | |
3103 | Lisp_Object pid, sigcode; | |
d0d6b7c5 JB |
3104 | { |
3105 | CHECK_NUMBER (pid, 0); | |
4766242d RS |
3106 | |
3107 | #define handle_signal(NAME, VALUE) \ | |
3108 | else if (!strcmp (name, NAME)) \ | |
3109 | XSETINT (sigcode, VALUE) | |
3110 | ||
3111 | if (INTEGERP (sigcode)) | |
3112 | ; | |
3113 | else | |
3114 | { | |
3115 | unsigned char *name; | |
3116 | ||
3117 | CHECK_SYMBOL (sigcode, 1); | |
3118 | name = XSYMBOL (sigcode)->name->data; | |
3119 | ||
3120 | if (0) | |
3121 | ; | |
3122 | #ifdef SIGHUP | |
3123 | handle_signal ("SIGHUP", SIGHUP); | |
3124 | #endif | |
3125 | #ifdef SIGINT | |
3126 | handle_signal ("SIGINT", SIGINT); | |
3127 | #endif | |
3128 | #ifdef SIGQUIT | |
3129 | handle_signal ("SIGQUIT", SIGQUIT); | |
3130 | #endif | |
3131 | #ifdef SIGILL | |
3132 | handle_signal ("SIGILL", SIGILL); | |
3133 | #endif | |
3134 | #ifdef SIGABRT | |
3135 | handle_signal ("SIGABRT", SIGABRT); | |
3136 | #endif | |
3137 | #ifdef SIGEMT | |
3138 | handle_signal ("SIGEMT", SIGEMT); | |
3139 | #endif | |
3140 | #ifdef SIGKILL | |
3141 | handle_signal ("SIGKILL", SIGKILL); | |
3142 | #endif | |
3143 | #ifdef SIGFPE | |
3144 | handle_signal ("SIGFPE", SIGFPE); | |
3145 | #endif | |
3146 | #ifdef SIGBUS | |
3147 | handle_signal ("SIGBUS", SIGBUS); | |
3148 | #endif | |
3149 | #ifdef SIGSEGV | |
3150 | handle_signal ("SIGSEGV", SIGSEGV); | |
3151 | #endif | |
3152 | #ifdef SIGSYS | |
3153 | handle_signal ("SIGSYS", SIGSYS); | |
3154 | #endif | |
3155 | #ifdef SIGPIPE | |
3156 | handle_signal ("SIGPIPE", SIGPIPE); | |
3157 | #endif | |
3158 | #ifdef SIGALRM | |
3159 | handle_signal ("SIGALRM", SIGALRM); | |
3160 | #endif | |
3161 | #ifdef SIGTERM | |
3162 | handle_signal ("SIGTERM", SIGTERM); | |
3163 | #endif | |
3164 | #ifdef SIGURG | |
3165 | handle_signal ("SIGURG", SIGURG); | |
3166 | #endif | |
3167 | #ifdef SIGSTOP | |
3168 | handle_signal ("SIGSTOP", SIGSTOP); | |
3169 | #endif | |
3170 | #ifdef SIGTSTP | |
3171 | handle_signal ("SIGTSTP", SIGTSTP); | |
3172 | #endif | |
3173 | #ifdef SIGCONT | |
3174 | handle_signal ("SIGCONT", SIGCONT); | |
3175 | #endif | |
3176 | #ifdef SIGCHLD | |
3177 | handle_signal ("SIGCHLD", SIGCHLD); | |
3178 | #endif | |
3179 | #ifdef SIGTTIN | |
3180 | handle_signal ("SIGTTIN", SIGTTIN); | |
3181 | #endif | |
3182 | #ifdef SIGTTOU | |
3183 | handle_signal ("SIGTTOU", SIGTTOU); | |
3184 | #endif | |
3185 | #ifdef SIGIO | |
3186 | handle_signal ("SIGIO", SIGIO); | |
3187 | #endif | |
3188 | #ifdef SIGXCPU | |
3189 | handle_signal ("SIGXCPU", SIGXCPU); | |
3190 | #endif | |
3191 | #ifdef SIGXFSZ | |
3192 | handle_signal ("SIGXFSZ", SIGXFSZ); | |
3193 | #endif | |
3194 | #ifdef SIGVTALRM | |
3195 | handle_signal ("SIGVTALRM", SIGVTALRM); | |
3196 | #endif | |
3197 | #ifdef SIGPROF | |
3198 | handle_signal ("SIGPROF", SIGPROF); | |
3199 | #endif | |
3200 | #ifdef SIGWINCH | |
3201 | handle_signal ("SIGWINCH", SIGWINCH); | |
3202 | #endif | |
3203 | #ifdef SIGINFO | |
3204 | handle_signal ("SIGINFO", SIGINFO); | |
3205 | #endif | |
3206 | #ifdef SIGUSR1 | |
3207 | handle_signal ("SIGUSR1", SIGUSR1); | |
3208 | #endif | |
3209 | #ifdef SIGUSR2 | |
3210 | handle_signal ("SIGUSR2", SIGUSR2); | |
3211 | #endif | |
3212 | else | |
9fa195a2 | 3213 | error ("Undefined signal name %s", name); |
4766242d RS |
3214 | } |
3215 | ||
3216 | #undef handle_signal | |
3217 | ||
4766242d | 3218 | return make_number (kill (XINT (pid), XINT (sigcode))); |
d0d6b7c5 JB |
3219 | } |
3220 | ||
3221 | DEFUN ("process-send-eof", Fprocess_send_eof, Sprocess_send_eof, 0, 1, 0, | |
3222 | "Make PROCESS see end-of-file in its input.\n\ | |
3223 | Eof comes after any text already sent to it.\n\ | |
ebb9e16f | 3224 | PROCESS may be a process, a buffer, the name of a process or buffer, or\n\ |
d33a00f2 RS |
3225 | nil, indicating the current buffer's process.\n\ |
3226 | If PROCESS is a network connection, or is a process communicating\n\ | |
3227 | through a pipe (as opposed to a pty), then you cannot send any more\n\ | |
3228 | text to PROCESS after you call this function.") | |
d0d6b7c5 JB |
3229 | (process) |
3230 | Lisp_Object process; | |
3231 | { | |
3232 | Lisp_Object proc; | |
3233 | ||
3234 | proc = get_process (process); | |
577d03d5 RS |
3235 | |
3236 | /* Make sure the process is really alive. */ | |
3237 | if (! NILP (XPROCESS (proc)->raw_status_low)) | |
3238 | update_status (XPROCESS (proc)); | |
3239 | if (! EQ (XPROCESS (proc)->status, Qrun)) | |
dcf970e6 | 3240 | error ("Process %s not running", XSTRING (XPROCESS (proc)->name)->data); |
577d03d5 | 3241 | |
d0d6b7c5 | 3242 | #ifdef VMS |
4556b700 | 3243 | send_process (proc, "\032", 1, Qnil); /* ^z */ |
d0d6b7c5 JB |
3244 | #else |
3245 | if (!NILP (XPROCESS (proc)->pty_flag)) | |
4556b700 | 3246 | send_process (proc, "\004", 1, Qnil); |
d0d6b7c5 JB |
3247 | else |
3248 | { | |
a9f2c884 | 3249 | close (XINT (XPROCESS (proc)->outfd)); |
1d056e64 | 3250 | XSETINT (XPROCESS (proc)->outfd, open (NULL_DEVICE, O_WRONLY)); |
d0d6b7c5 JB |
3251 | } |
3252 | #endif /* VMS */ | |
d0d6b7c5 JB |
3253 | return process; |
3254 | } | |
3255 | ||
3256 | /* Kill all processes associated with `buffer'. | |
3257 | If `buffer' is nil, kill all processes */ | |
3258 | ||
3259 | kill_buffer_processes (buffer) | |
3260 | Lisp_Object buffer; | |
3261 | { | |
3262 | Lisp_Object tail, proc; | |
3263 | ||
b5b502d6 | 3264 | for (tail = Vprocess_alist; GC_CONSP (tail); tail = XCONS (tail)->cdr) |
d0d6b7c5 JB |
3265 | { |
3266 | proc = XCONS (XCONS (tail)->car)->cdr; | |
b5b502d6 | 3267 | if (GC_PROCESSP (proc) |
d0d6b7c5 JB |
3268 | && (NILP (buffer) || EQ (XPROCESS (proc)->buffer, buffer))) |
3269 | { | |
3270 | if (NETCONN_P (proc)) | |
e1ab4959 | 3271 | Fdelete_process (proc); |
a9f2c884 | 3272 | else if (XINT (XPROCESS (proc)->infd) >= 0) |
d0d6b7c5 JB |
3273 | process_send_signal (proc, SIGHUP, Qnil, 1); |
3274 | } | |
3275 | } | |
3276 | } | |
3277 | \f | |
3278 | /* On receipt of a signal that a child status has changed, | |
3279 | loop asking about children with changed statuses until | |
3280 | the system says there are no more. | |
3281 | All we do is change the status; | |
3282 | we do not run sentinels or print notifications. | |
3283 | That is saved for the next time keyboard input is done, | |
3284 | in order to avoid timing errors. */ | |
3285 | ||
3286 | /** WARNING: this can be called during garbage collection. | |
3287 | Therefore, it must not be fooled by the presence of mark bits in | |
3288 | Lisp objects. */ | |
3289 | ||
3290 | /** USG WARNING: Although it is not obvious from the documentation | |
3291 | in signal(2), on a USG system the SIGCLD handler MUST NOT call | |
3292 | signal() before executing at least one wait(), otherwise the handler | |
3293 | will be called again, resulting in an infinite loop. The relevant | |
3294 | portion of the documentation reads "SIGCLD signals will be queued | |
3295 | and the signal-catching function will be continually reentered until | |
3296 | the queue is empty". Invoking signal() causes the kernel to reexamine | |
3297 | the SIGCLD queue. Fred Fish, UniSoft Systems Inc. */ | |
3298 | ||
3299 | SIGTYPE | |
3300 | sigchld_handler (signo) | |
3301 | int signo; | |
3302 | { | |
3303 | int old_errno = errno; | |
3304 | Lisp_Object proc; | |
3305 | register struct Lisp_Process *p; | |
6be429b1 | 3306 | extern EMACS_TIME *input_available_clear_time; |
d0d6b7c5 JB |
3307 | |
3308 | #ifdef BSD4_1 | |
3309 | extern int sigheld; | |
3310 | sigheld |= sigbit (SIGCHLD); | |
3311 | #endif | |
3312 | ||
3313 | while (1) | |
3314 | { | |
3315 | register int pid; | |
3316 | WAITTYPE w; | |
3317 | Lisp_Object tail; | |
3318 | ||
3319 | #ifdef WNOHANG | |
3320 | #ifndef WUNTRACED | |
3321 | #define WUNTRACED 0 | |
3322 | #endif /* no WUNTRACED */ | |
3323 | /* Keep trying to get a status until we get a definitive result. */ | |
3324 | do | |
3325 | { | |
3326 | errno = 0; | |
3327 | pid = wait3 (&w, WNOHANG | WUNTRACED, 0); | |
3328 | } | |
3329 | while (pid <= 0 && errno == EINTR); | |
3330 | ||
3331 | if (pid <= 0) | |
3332 | { | |
3333 | /* A real failure. We have done all our job, so return. */ | |
3334 | ||
3335 | /* USG systems forget handlers when they are used; | |
3336 | must reestablish each time */ | |
3337 | #ifdef USG | |
3338 | signal (signo, sigchld_handler); /* WARNING - must come after wait3() */ | |
3339 | #endif | |
3340 | #ifdef BSD4_1 | |
3341 | sigheld &= ~sigbit (SIGCHLD); | |
3342 | sigrelse (SIGCHLD); | |
3343 | #endif | |
3344 | errno = old_errno; | |
3345 | return; | |
3346 | } | |
3347 | #else | |
3348 | pid = wait (&w); | |
3349 | #endif /* no WNOHANG */ | |
3350 | ||
3351 | /* Find the process that signaled us, and record its status. */ | |
3352 | ||
3353 | p = 0; | |
7968cc2d | 3354 | for (tail = Vprocess_alist; CONSP (tail); tail = XCONS (tail)->cdr) |
d0d6b7c5 JB |
3355 | { |
3356 | proc = XCONS (XCONS (tail)->car)->cdr; | |
3357 | p = XPROCESS (proc); | |
3358 | if (EQ (p->childp, Qt) && XFASTINT (p->pid) == pid) | |
3359 | break; | |
3360 | p = 0; | |
3361 | } | |
3362 | ||
3363 | /* Look for an asynchronous process whose pid hasn't been filled | |
3364 | in yet. */ | |
3365 | if (p == 0) | |
7968cc2d | 3366 | for (tail = Vprocess_alist; CONSP (tail); tail = XCONS (tail)->cdr) |
d0d6b7c5 JB |
3367 | { |
3368 | proc = XCONS (XCONS (tail)->car)->cdr; | |
3369 | p = XPROCESS (proc); | |
bcd69aea | 3370 | if (INTEGERP (p->pid) && XINT (p->pid) == -1) |
d0d6b7c5 JB |
3371 | break; |
3372 | p = 0; | |
3373 | } | |
3374 | ||
3375 | /* Change the status of the process that was found. */ | |
3376 | if (p != 0) | |
3377 | { | |
3378 | union { int i; WAITTYPE wt; } u; | |
e98d950b | 3379 | int clear_desc_flag = 0; |
d0d6b7c5 JB |
3380 | |
3381 | XSETINT (p->tick, ++process_tick); | |
3382 | u.wt = w; | |
5fc0154c RS |
3383 | XSETINT (p->raw_status_low, u.i & 0xffff); |
3384 | XSETINT (p->raw_status_high, u.i >> 16); | |
d0d6b7c5 JB |
3385 | |
3386 | /* If process has terminated, stop waiting for its output. */ | |
e98d950b RS |
3387 | if ((WIFSIGNALED (w) || WIFEXITED (w)) |
3388 | && XINT (p->infd) >= 0) | |
3389 | clear_desc_flag = 1; | |
3390 | ||
3391 | /* We use clear_desc_flag to avoid a compiler bug in Microsoft C. */ | |
3392 | if (clear_desc_flag) | |
3393 | { | |
3394 | FD_CLR (XINT (p->infd), &input_wait_mask); | |
3395 | FD_CLR (XINT (p->infd), &non_keyboard_wait_mask); | |
3396 | } | |
6be429b1 JB |
3397 | |
3398 | /* Tell wait_reading_process_input that it needs to wake up and | |
3399 | look around. */ | |
3400 | if (input_available_clear_time) | |
3401 | EMACS_SET_SECS_USECS (*input_available_clear_time, 0, 0); | |
d0d6b7c5 JB |
3402 | } |
3403 | ||
3404 | /* There was no asynchronous process found for that id. Check | |
3405 | if we have a synchronous process. */ | |
3406 | else | |
3407 | { | |
3408 | synch_process_alive = 0; | |
3409 | ||
3410 | /* Report the status of the synchronous process. */ | |
3411 | if (WIFEXITED (w)) | |
3412 | synch_process_retcode = WRETCODE (w); | |
3413 | else if (WIFSIGNALED (w)) | |
b97ad9ea RS |
3414 | { |
3415 | int code = WTERMSIG (w); | |
3416 | char *signame = 0; | |
3417 | ||
3418 | if (code < NSIG) | |
3419 | { | |
b0310da4 | 3420 | #ifndef VMS |
ed0cae05 RS |
3421 | /* Suppress warning if the table has const char *. */ |
3422 | signame = (char *) sys_siglist[code]; | |
b0310da4 | 3423 | #else |
b97ad9ea | 3424 | signame = sys_errlist[code]; |
b0310da4 | 3425 | #endif |
b97ad9ea RS |
3426 | } |
3427 | if (signame == 0) | |
3428 | signame = "unknown"; | |
3429 | ||
3430 | synch_process_death = signame; | |
3431 | } | |
6be429b1 JB |
3432 | |
3433 | /* Tell wait_reading_process_input that it needs to wake up and | |
3434 | look around. */ | |
3435 | if (input_available_clear_time) | |
3436 | EMACS_SET_SECS_USECS (*input_available_clear_time, 0, 0); | |
d0d6b7c5 JB |
3437 | } |
3438 | ||
3439 | /* On some systems, we must return right away. | |
3440 | If any more processes want to signal us, we will | |
3441 | get another signal. | |
3442 | Otherwise (on systems that have WNOHANG), loop around | |
3443 | to use up all the processes that have something to tell us. */ | |
e98d950b | 3444 | #if defined (USG) && ! (defined (HPUX) && defined (WNOHANG)) || defined (WINDOWSNT) |
d0d6b7c5 JB |
3445 | #ifdef USG |
3446 | signal (signo, sigchld_handler); | |
3447 | #endif | |
3448 | errno = old_errno; | |
3449 | return; | |
3450 | #endif /* USG, but not HPUX with WNOHANG */ | |
3451 | } | |
3452 | } | |
3453 | \f | |
3454 | ||
3455 | static Lisp_Object | |
3456 | exec_sentinel_unwind (data) | |
3457 | Lisp_Object data; | |
3458 | { | |
3459 | XPROCESS (XCONS (data)->car)->sentinel = XCONS (data)->cdr; | |
3460 | return Qnil; | |
3461 | } | |
3462 | ||
3b9a3dfa RS |
3463 | static Lisp_Object |
3464 | exec_sentinel_error_handler (error) | |
3465 | Lisp_Object error; | |
3466 | { | |
3467 | cmd_error_internal (error, "error in process sentinel: "); | |
3468 | Vinhibit_quit = Qt; | |
3469 | update_echo_area (); | |
833ba342 | 3470 | Fsleep_for (make_number (2), Qnil); |
3b9a3dfa RS |
3471 | } |
3472 | ||
d0d6b7c5 JB |
3473 | static void |
3474 | exec_sentinel (proc, reason) | |
3475 | Lisp_Object proc, reason; | |
3476 | { | |
dfc21838 | 3477 | Lisp_Object sentinel, obuffer, odeactivate, okeymap; |
d0d6b7c5 JB |
3478 | register struct Lisp_Process *p = XPROCESS (proc); |
3479 | int count = specpdl_ptr - specpdl; | |
3480 | ||
dfc21838 RS |
3481 | /* No need to gcpro these, because all we do with them later |
3482 | is test them for EQness, and none of them should be a string. */ | |
8fb3cf64 | 3483 | odeactivate = Vdeactivate_mark; |
dfc21838 RS |
3484 | XSETBUFFER (obuffer, current_buffer); |
3485 | okeymap = current_buffer->keymap; | |
3486 | ||
d0d6b7c5 JB |
3487 | sentinel = p->sentinel; |
3488 | if (NILP (sentinel)) | |
3489 | return; | |
3490 | ||
3491 | /* Zilch the sentinel while it's running, to avoid recursive invocations; | |
3492 | assure that it gets restored no matter how the sentinel exits. */ | |
3493 | p->sentinel = Qnil; | |
3494 | record_unwind_protect (exec_sentinel_unwind, Fcons (proc, sentinel)); | |
3495 | /* Inhibit quit so that random quits don't screw up a running filter. */ | |
3496 | specbind (Qinhibit_quit, Qt); | |
6545aada | 3497 | specbind (Qlast_nonmenu_event, Qt); |
3b9a3dfa | 3498 | |
7074fde6 | 3499 | running_asynch_code = 1; |
3b9a3dfa RS |
3500 | internal_condition_case_1 (read_process_output_call, |
3501 | Fcons (sentinel, | |
3502 | Fcons (proc, Fcons (reason, Qnil))), | |
3503 | !NILP (Vdebug_on_error) ? Qnil : Qerror, | |
3504 | exec_sentinel_error_handler); | |
7074fde6 FP |
3505 | running_asynch_code = 0; |
3506 | restore_match_data (); | |
8fb3cf64 KH |
3507 | |
3508 | Vdeactivate_mark = odeactivate; | |
7973cfa8 | 3509 | #if 0 |
dfc21838 RS |
3510 | if (! EQ (Fcurrent_buffer (), obuffer) |
3511 | || ! EQ (current_buffer->keymap, okeymap)) | |
7973cfa8 | 3512 | #endif |
927e08be RS |
3513 | /* But do it only if the caller is actually going to read events. |
3514 | Otherwise there's no need to make him wake up, and it could | |
3515 | cause trouble (for example it would make Fsit_for return). */ | |
3516 | if (waiting_for_user_input_p == -1) | |
3517 | record_asynch_buffer_change (); | |
8fb3cf64 | 3518 | |
2ea6d561 | 3519 | unbind_to (count, Qnil); |
d0d6b7c5 JB |
3520 | } |
3521 | ||
3522 | /* Report all recent events of a change in process status | |
3523 | (either run the sentinel or output a message). | |
3524 | This is done while Emacs is waiting for keyboard input. */ | |
3525 | ||
3526 | status_notify () | |
3527 | { | |
3528 | register Lisp_Object proc, buffer; | |
2e4149a8 | 3529 | Lisp_Object tail, msg; |
d0d6b7c5 JB |
3530 | struct gcpro gcpro1, gcpro2; |
3531 | ||
2e4149a8 KH |
3532 | tail = Qnil; |
3533 | msg = Qnil; | |
d0d6b7c5 JB |
3534 | /* We need to gcpro tail; if read_process_output calls a filter |
3535 | which deletes a process and removes the cons to which tail points | |
3536 | from Vprocess_alist, and then causes a GC, tail is an unprotected | |
3537 | reference. */ | |
3538 | GCPRO2 (tail, msg); | |
3539 | ||
30623085 RS |
3540 | /* Set this now, so that if new processes are created by sentinels |
3541 | that we run, we get called again to handle their status changes. */ | |
3542 | update_tick = process_tick; | |
3543 | ||
3544 | for (tail = Vprocess_alist; !NILP (tail); tail = Fcdr (tail)) | |
d0d6b7c5 | 3545 | { |
30623085 RS |
3546 | Lisp_Object symbol; |
3547 | register struct Lisp_Process *p; | |
3548 | ||
3549 | proc = Fcdr (Fcar (tail)); | |
3550 | p = XPROCESS (proc); | |
3551 | ||
3552 | if (XINT (p->tick) != XINT (p->update_tick)) | |
d0d6b7c5 | 3553 | { |
30623085 | 3554 | XSETINT (p->update_tick, XINT (p->tick)); |
d0d6b7c5 | 3555 | |
30623085 RS |
3556 | /* If process is still active, read any output that remains. */ |
3557 | if (XINT (p->infd) >= 0) | |
3558 | while (! EQ (p->filter, Qt) | |
3559 | && read_process_output (proc, XINT (p->infd)) > 0); | |
d0d6b7c5 | 3560 | |
30623085 | 3561 | buffer = p->buffer; |
d0d6b7c5 | 3562 | |
30623085 RS |
3563 | /* Get the text to use for the message. */ |
3564 | if (!NILP (p->raw_status_low)) | |
3565 | update_status (p); | |
3566 | msg = status_message (p->status); | |
d0d6b7c5 | 3567 | |
30623085 RS |
3568 | /* If process is terminated, deactivate it or delete it. */ |
3569 | symbol = p->status; | |
3570 | if (CONSP (p->status)) | |
3571 | symbol = XCONS (p->status)->car; | |
d0d6b7c5 | 3572 | |
30623085 RS |
3573 | if (EQ (symbol, Qsignal) || EQ (symbol, Qexit) |
3574 | || EQ (symbol, Qclosed)) | |
3575 | { | |
3576 | if (delete_exited_processes) | |
3577 | remove_process (proc); | |
3578 | else | |
3579 | deactivate_process (proc); | |
3580 | } | |
d0d6b7c5 | 3581 | |
30623085 RS |
3582 | /* Now output the message suitably. */ |
3583 | if (!NILP (p->sentinel)) | |
3584 | exec_sentinel (proc, msg); | |
3585 | /* Don't bother with a message in the buffer | |
3586 | when a process becomes runnable. */ | |
3587 | else if (!EQ (symbol, Qrun) && !NILP (buffer)) | |
3588 | { | |
3589 | Lisp_Object ro, tem; | |
3590 | struct buffer *old = current_buffer; | |
3591 | int opoint; | |
2e4149a8 | 3592 | |
30623085 | 3593 | ro = XBUFFER (buffer)->read_only; |
d0d6b7c5 | 3594 | |
30623085 RS |
3595 | /* Avoid error if buffer is deleted |
3596 | (probably that's why the process is dead, too) */ | |
3597 | if (NILP (XBUFFER (buffer)->name)) | |
3598 | continue; | |
3599 | Fset_buffer (buffer); | |
3600 | opoint = point; | |
3601 | /* Insert new output into buffer | |
3602 | at the current end-of-output marker, | |
3603 | thus preserving logical ordering of input and output. */ | |
3604 | if (XMARKER (p->mark)->buffer) | |
3605 | SET_PT (marker_position (p->mark)); | |
3606 | else | |
3607 | SET_PT (ZV); | |
3608 | if (point <= opoint) | |
3609 | opoint += XSTRING (msg)->size + XSTRING (p->name)->size + 10; | |
3610 | ||
3611 | tem = current_buffer->read_only; | |
3612 | current_buffer->read_only = Qnil; | |
3613 | insert_string ("\nProcess "); | |
3614 | Finsert (1, &p->name); | |
3615 | insert_string (" "); | |
3616 | Finsert (1, &msg); | |
3617 | current_buffer->read_only = tem; | |
3618 | Fset_marker (p->mark, make_number (point), p->buffer); | |
3619 | ||
3620 | SET_PT (opoint); | |
3621 | set_buffer_internal (old); | |
d0d6b7c5 | 3622 | } |
30623085 RS |
3623 | } |
3624 | } /* end for */ | |
d0d6b7c5 JB |
3625 | |
3626 | update_mode_lines++; /* in case buffers use %s in mode-line-format */ | |
3627 | redisplay_preserve_echo_area (); | |
3628 | ||
d0d6b7c5 JB |
3629 | UNGCPRO; |
3630 | } | |
3631 | \f | |
a69281ff RS |
3632 | /* The first time this is called, assume keyboard input comes from DESC |
3633 | instead of from where we used to expect it. | |
3634 | Subsequent calls mean assume input keyboard can come from DESC | |
3635 | in addition to other places. */ | |
3636 | ||
3637 | static int add_keyboard_wait_descriptor_called_flag; | |
3638 | ||
3639 | void | |
3640 | add_keyboard_wait_descriptor (desc) | |
3641 | int desc; | |
3642 | { | |
3643 | if (! add_keyboard_wait_descriptor_called_flag) | |
3644 | FD_CLR (0, &input_wait_mask); | |
3645 | add_keyboard_wait_descriptor_called_flag = 1; | |
3646 | FD_SET (desc, &input_wait_mask); | |
3647 | if (desc > max_keyboard_desc) | |
3648 | max_keyboard_desc = desc; | |
3649 | } | |
3650 | ||
3651 | /* From now on, do not expect DESC to give keyboard input. */ | |
3652 | ||
3653 | void | |
3654 | delete_keyboard_wait_descriptor (desc) | |
3655 | int desc; | |
3656 | { | |
3657 | int fd; | |
3658 | int lim = max_keyboard_desc; | |
3659 | ||
3660 | FD_CLR (desc, &input_wait_mask); | |
3661 | ||
3662 | if (desc == max_keyboard_desc) | |
3663 | for (fd = 0; fd < lim; fd++) | |
3664 | if (FD_ISSET (fd, &input_wait_mask) | |
3665 | && !FD_ISSET (fd, &non_keyboard_wait_mask)) | |
3666 | max_keyboard_desc = fd; | |
3667 | } | |
3668 | ||
3669 | /* Return nonzero if *MASK has a bit set | |
3670 | that corresponds to one of the keyboard input descriptors. */ | |
3671 | ||
3672 | int | |
3673 | keyboard_bit_set (mask) | |
3674 | SELECT_TYPE *mask; | |
3675 | { | |
3676 | int fd; | |
3677 | ||
ee8e09af | 3678 | for (fd = 0; fd <= max_keyboard_desc; fd++) |
a69281ff RS |
3679 | if (FD_ISSET (fd, mask) && FD_ISSET (fd, &input_wait_mask) |
3680 | && !FD_ISSET (fd, &non_keyboard_wait_mask)) | |
3681 | return 1; | |
3682 | ||
3683 | return 0; | |
3684 | } | |
3685 | \f | |
d0d6b7c5 JB |
3686 | init_process () |
3687 | { | |
3688 | register int i; | |
3689 | ||
3690 | #ifdef SIGCHLD | |
3691 | #ifndef CANNOT_DUMP | |
3692 | if (! noninteractive || initialized) | |
3693 | #endif | |
3694 | signal (SIGCHLD, sigchld_handler); | |
3695 | #endif | |
3696 | ||
3697 | FD_ZERO (&input_wait_mask); | |
a69281ff | 3698 | FD_ZERO (&non_keyboard_wait_mask); |
7d0e672e | 3699 | max_process_desc = 0; |
dd2281ae | 3700 | |
a69281ff | 3701 | FD_SET (0, &input_wait_mask); |
dd2281ae | 3702 | |
d0d6b7c5 JB |
3703 | Vprocess_alist = Qnil; |
3704 | for (i = 0; i < MAXDESC; i++) | |
3705 | { | |
3706 | chan_process[i] = Qnil; | |
3707 | proc_buffered_char[i] = -1; | |
3708 | } | |
3709 | } | |
312c9964 | 3710 | |
d0d6b7c5 JB |
3711 | syms_of_process () |
3712 | { | |
d0d6b7c5 JB |
3713 | #ifdef HAVE_SOCKETS |
3714 | stream_process = intern ("stream"); | |
3715 | #endif | |
3716 | Qprocessp = intern ("processp"); | |
3717 | staticpro (&Qprocessp); | |
3718 | Qrun = intern ("run"); | |
3719 | staticpro (&Qrun); | |
3720 | Qstop = intern ("stop"); | |
3721 | staticpro (&Qstop); | |
3722 | Qsignal = intern ("signal"); | |
3723 | staticpro (&Qsignal); | |
3724 | ||
3725 | /* Qexit is already staticpro'd by syms_of_eval; don't staticpro it | |
3726 | here again. | |
3727 | ||
3728 | Qexit = intern ("exit"); | |
3729 | staticpro (&Qexit); */ | |
3730 | ||
3731 | Qopen = intern ("open"); | |
3732 | staticpro (&Qopen); | |
3733 | Qclosed = intern ("closed"); | |
3734 | staticpro (&Qclosed); | |
3735 | ||
6545aada RS |
3736 | Qlast_nonmenu_event = intern ("last-nonmenu-event"); |
3737 | staticpro (&Qlast_nonmenu_event); | |
3738 | ||
d0d6b7c5 JB |
3739 | staticpro (&Vprocess_alist); |
3740 | ||
3741 | DEFVAR_BOOL ("delete-exited-processes", &delete_exited_processes, | |
3742 | "*Non-nil means delete processes immediately when they exit.\n\ | |
3743 | nil means don't delete them until `list-processes' is run."); | |
3744 | ||
3745 | delete_exited_processes = 1; | |
3746 | ||
3747 | DEFVAR_LISP ("process-connection-type", &Vprocess_connection_type, | |
3748 | "Control type of device used to communicate with subprocesses.\n\ | |
e333e864 RS |
3749 | Values are nil to use a pipe, or t or `pty' to use a pty.\n\ |
3750 | The value has no effect if the system has no ptys or if all ptys are busy:\n\ | |
3751 | then a pipe is used in any case.\n\ | |
3752 | The value takes effect when `start-process' is called."); | |
d0d6b7c5 JB |
3753 | Vprocess_connection_type = Qt; |
3754 | ||
3755 | defsubr (&Sprocessp); | |
3756 | defsubr (&Sget_process); | |
3757 | defsubr (&Sget_buffer_process); | |
3758 | defsubr (&Sdelete_process); | |
3759 | defsubr (&Sprocess_status); | |
3760 | defsubr (&Sprocess_exit_status); | |
3761 | defsubr (&Sprocess_id); | |
3762 | defsubr (&Sprocess_name); | |
3b9a3dfa | 3763 | defsubr (&Sprocess_tty_name); |
d0d6b7c5 JB |
3764 | defsubr (&Sprocess_command); |
3765 | defsubr (&Sset_process_buffer); | |
3766 | defsubr (&Sprocess_buffer); | |
3767 | defsubr (&Sprocess_mark); | |
3768 | defsubr (&Sset_process_filter); | |
3769 | defsubr (&Sprocess_filter); | |
3770 | defsubr (&Sset_process_sentinel); | |
396df322 | 3771 | defsubr (&Sset_process_window_size); |
d0d6b7c5 JB |
3772 | defsubr (&Sprocess_sentinel); |
3773 | defsubr (&Sprocess_kill_without_query); | |
3774 | defsubr (&Slist_processes); | |
3775 | defsubr (&Sprocess_list); | |
3776 | defsubr (&Sstart_process); | |
3777 | #ifdef HAVE_SOCKETS | |
3778 | defsubr (&Sopen_network_stream); | |
3779 | #endif /* HAVE_SOCKETS */ | |
3780 | defsubr (&Saccept_process_output); | |
3781 | defsubr (&Sprocess_send_region); | |
3782 | defsubr (&Sprocess_send_string); | |
3783 | defsubr (&Sinterrupt_process); | |
3784 | defsubr (&Skill_process); | |
3785 | defsubr (&Squit_process); | |
3786 | defsubr (&Sstop_process); | |
3787 | defsubr (&Scontinue_process); | |
3788 | defsubr (&Sprocess_send_eof); | |
3789 | defsubr (&Ssignal_process); | |
3790 | defsubr (&Swaiting_for_user_input_p); | |
3791 | /* defsubr (&Sprocess_connection); */ | |
3792 | } | |
3793 | ||
6720a7fb JB |
3794 | \f |
3795 | #else /* not subprocesses */ | |
3796 | ||
3797 | #include <sys/types.h> | |
3798 | #include <errno.h> | |
3799 | ||
3800 | #include "lisp.h" | |
3801 | #include "systime.h" | |
3802 | #include "termopts.h" | |
81afb6d1 | 3803 | #include "sysselect.h" |
6720a7fb | 3804 | |
ff11dfa1 | 3805 | extern int frame_garbaged; |
6720a7fb | 3806 | |
f694e5d2 KH |
3807 | extern EMACS_TIME timer_check (); |
3808 | extern int timers_run; | |
6720a7fb JB |
3809 | |
3810 | /* As described above, except assuming that there are no subprocesses: | |
3811 | ||
3812 | Wait for timeout to elapse and/or keyboard input to be available. | |
3813 | ||
3814 | time_limit is: | |
3815 | timeout in seconds, or | |
3816 | zero for no limit, or | |
3817 | -1 means gobble data immediately available but don't wait for any. | |
3818 | ||
f76475ad | 3819 | read_kbd is a Lisp_Object: |
6720a7fb JB |
3820 | 0 to ignore keyboard input, or |
3821 | 1 to return when input is available, or | |
3822 | -1 means caller will actually read the input, so don't throw to | |
3823 | the quit handler. | |
0a65b032 RS |
3824 | a cons cell, meaning wait until its car is non-nil |
3825 | (and gobble terminal input into the buffer if any arrives), or | |
6720a7fb JB |
3826 | We know that read_kbd will never be a Lisp_Process, since |
3827 | `subprocesses' isn't defined. | |
3828 | ||
3829 | do_display != 0 means redisplay should be done to show subprocess | |
5164ee8e | 3830 | output that arrives. |
6720a7fb | 3831 | |
eb8c3be9 | 3832 | Return true iff we received input from any process. */ |
6720a7fb JB |
3833 | |
3834 | int | |
3835 | wait_reading_process_input (time_limit, microsecs, read_kbd, do_display) | |
f76475ad JB |
3836 | int time_limit, microsecs; |
3837 | Lisp_Object read_kbd; | |
3838 | int do_display; | |
6720a7fb | 3839 | { |
f694e5d2 | 3840 | EMACS_TIME end_time, timeout; |
8db121c4 | 3841 | SELECT_TYPE waitchannels; |
f694e5d2 | 3842 | int xerrno; |
0a65b032 RS |
3843 | Lisp_Object *wait_for_cell = 0; |
3844 | ||
3845 | /* If waiting for non-nil in a cell, record where. */ | |
3846 | if (CONSP (read_kbd)) | |
3847 | { | |
3848 | wait_for_cell = &XCONS (read_kbd)->car; | |
3849 | XSETFASTINT (read_kbd, 0); | |
3850 | } | |
6720a7fb JB |
3851 | |
3852 | /* What does time_limit really mean? */ | |
3853 | if (time_limit || microsecs) | |
3854 | { | |
6720a7fb JB |
3855 | if (time_limit == -1) |
3856 | /* In fact, it's zero. */ | |
3857 | EMACS_SET_SECS_USECS (timeout, 0, 0); | |
3858 | else | |
3859 | EMACS_SET_SECS_USECS (timeout, time_limit, microsecs); | |
3860 | ||
3861 | /* How far in the future is that? */ | |
3862 | EMACS_GET_TIME (end_time); | |
3863 | EMACS_ADD_TIME (end_time, end_time, timeout); | |
3864 | } | |
3865 | else | |
3866 | /* It's infinite. */ | |
f694e5d2 | 3867 | EMACS_SET_SECS_USECS (timeout, 100000, 0); |
6720a7fb JB |
3868 | |
3869 | /* Turn off periodic alarms (in case they are in use) | |
3870 | because the select emulator uses alarms. */ | |
3871 | stop_polling (); | |
3872 | ||
3873 | for (;;) | |
3874 | { | |
3875 | int nfds; | |
bae8d137 | 3876 | int timeout_reduced_for_timers = 0; |
6720a7fb | 3877 | |
6720a7fb JB |
3878 | /* If calling from keyboard input, do not quit |
3879 | since we want to return C-g as an input character. | |
3880 | Otherwise, do pending quit if requested. */ | |
f76475ad | 3881 | if (XINT (read_kbd) >= 0) |
6720a7fb JB |
3882 | QUIT; |
3883 | ||
0a65b032 RS |
3884 | /* Exit now if the cell we're waiting for became non-nil. */ |
3885 | if (wait_for_cell && ! NILP (*wait_for_cell)) | |
3886 | break; | |
3887 | ||
bae8d137 RS |
3888 | /* Compute time from now till when time limit is up */ |
3889 | /* Exit if already run out */ | |
f694e5d2 | 3890 | if (time_limit > 0 || microsecs) |
6720a7fb | 3891 | { |
f694e5d2 KH |
3892 | EMACS_GET_TIME (timeout); |
3893 | EMACS_SUB_TIME (timeout, end_time, timeout); | |
3894 | if (EMACS_TIME_NEG_P (timeout)) | |
6720a7fb JB |
3895 | break; |
3896 | } | |
3897 | ||
bae8d137 RS |
3898 | /* If our caller will not immediately handle keyboard events, |
3899 | run timer events directly. | |
3900 | (Callers that will immediately read keyboard events | |
3901 | call timer_delay on their own.) */ | |
f854a00b | 3902 | if (! wait_for_cell) |
bae8d137 RS |
3903 | { |
3904 | EMACS_TIME timer_delay; | |
0a65b032 RS |
3905 | int old_timers_run; |
3906 | ||
3907 | retry: | |
3908 | old_timers_run = timers_run; | |
bae8d137 RS |
3909 | timer_delay = timer_check (1); |
3910 | if (timers_run != old_timers_run && do_display) | |
0a65b032 RS |
3911 | { |
3912 | redisplay_preserve_echo_area (); | |
3913 | /* We must retry, since a timer may have requeued itself | |
3914 | and that could alter the time delay. */ | |
3915 | goto retry; | |
3916 | } | |
3917 | ||
f694e5d2 | 3918 | if (! EMACS_TIME_NEG_P (timer_delay) && time_limit != -1) |
bae8d137 RS |
3919 | { |
3920 | EMACS_TIME difference; | |
f694e5d2 | 3921 | EMACS_SUB_TIME (difference, timer_delay, timeout); |
bae8d137 RS |
3922 | if (EMACS_TIME_NEG_P (difference)) |
3923 | { | |
f694e5d2 | 3924 | timeout = timer_delay; |
bae8d137 RS |
3925 | timeout_reduced_for_timers = 1; |
3926 | } | |
3927 | } | |
3928 | } | |
3929 | ||
6720a7fb JB |
3930 | /* Cause C-g and alarm signals to take immediate action, |
3931 | and cause input available signals to zero out timeout. */ | |
f76475ad | 3932 | if (XINT (read_kbd) < 0) |
6720a7fb JB |
3933 | set_waiting_for_input (&timeout); |
3934 | ||
0a65b032 RS |
3935 | /* Wait till there is something to do. */ |
3936 | ||
3937 | if (! XINT (read_kbd) && wait_for_cell == 0) | |
3938 | FD_ZERO (&waitchannels); | |
3939 | else | |
3940 | FD_SET (0, &waitchannels); | |
3941 | ||
ff11dfa1 | 3942 | /* If a frame has been newly mapped and needs updating, |
6720a7fb | 3943 | reprocess its display stuff. */ |
5164ee8e | 3944 | if (frame_garbaged && do_display) |
0a65b032 RS |
3945 | { |
3946 | clear_waiting_for_input (); | |
3947 | redisplay_preserve_echo_area (); | |
3948 | if (XINT (read_kbd) < 0) | |
3949 | set_waiting_for_input (&timeout); | |
3950 | } | |
6720a7fb | 3951 | |
1861b214 RS |
3952 | if (XINT (read_kbd) && detect_input_pending ()) |
3953 | { | |
3954 | nfds = 0; | |
3955 | FD_ZERO (&waitchannels); | |
3956 | } | |
3957 | else | |
3958 | nfds = select (1, &waitchannels, (SELECT_TYPE *)0, (SELECT_TYPE *)0, | |
3959 | &timeout); | |
f694e5d2 KH |
3960 | |
3961 | xerrno = errno; | |
6720a7fb JB |
3962 | |
3963 | /* Make C-g and alarm signals set flags again */ | |
3964 | clear_waiting_for_input (); | |
3965 | ||
3966 | /* If we woke up due to SIGWINCH, actually change size now. */ | |
3967 | do_pending_window_change (); | |
3968 | ||
f694e5d2 KH |
3969 | if (time_limit && nfds == 0 && ! timeout_reduced_for_timers) |
3970 | /* We waited the full specified time, so return now. */ | |
3971 | break; | |
3972 | ||
6720a7fb JB |
3973 | if (nfds == -1) |
3974 | { | |
3975 | /* If the system call was interrupted, then go around the | |
3976 | loop again. */ | |
f694e5d2 | 3977 | if (xerrno == EINTR) |
8db121c4 | 3978 | FD_ZERO (&waitchannels); |
f694e5d2 KH |
3979 | else |
3980 | error ("select error: %s", strerror (xerrno)); | |
6720a7fb JB |
3981 | } |
3982 | #ifdef sun | |
3983 | else if (nfds > 0 && (waitchannels & 1) && interrupt_input) | |
3984 | /* System sometimes fails to deliver SIGIO. */ | |
3985 | kill (getpid (), SIGIO); | |
3986 | #endif | |
7324d660 | 3987 | #ifdef SIGIO |
f76475ad | 3988 | if (XINT (read_kbd) && interrupt_input && (waitchannels & 1)) |
e643c5be | 3989 | kill (getpid (), SIGIO); |
7324d660 | 3990 | #endif |
6720a7fb | 3991 | |
f694e5d2 KH |
3992 | /* Check for keyboard input */ |
3993 | ||
f854a00b | 3994 | if ((XINT (read_kbd) != 0) |
f694e5d2 KH |
3995 | && detect_input_pending_run_timers (do_display)) |
3996 | { | |
3997 | swallow_events (do_display); | |
3998 | if (detect_input_pending_run_timers (do_display)) | |
3999 | break; | |
4000 | } | |
0a65b032 | 4001 | |
f854a00b RS |
4002 | /* If wait_for_cell. check for keyboard input |
4003 | but don't run any timers. | |
4004 | ??? (It seems wrong to me to check for keyboard | |
4005 | input at all when wait_for_cell, but the code | |
4006 | has been this way since July 1994. | |
4007 | Try changing this after version 19.31.) */ | |
4008 | if (wait_for_cell | |
4009 | && detect_input_pending ()) | |
4010 | { | |
4011 | swallow_events (do_display); | |
4012 | if (detect_input_pending ()) | |
4013 | break; | |
4014 | } | |
4015 | ||
0a65b032 RS |
4016 | /* Exit now if the cell we're waiting for became non-nil. */ |
4017 | if (wait_for_cell && ! NILP (*wait_for_cell)) | |
4018 | break; | |
6720a7fb JB |
4019 | } |
4020 | ||
a87b802f JB |
4021 | start_polling (); |
4022 | ||
6720a7fb JB |
4023 | return 0; |
4024 | } | |
4025 | ||
4026 | ||
4027 | DEFUN ("get-buffer-process", Fget_buffer_process, Sget_buffer_process, 1, 1, 0, | |
51ab806a | 4028 | /* Don't confuse make-docfile by having two doc strings for this function. |
312c9964 RS |
4029 | make-docfile does not pay attention to #if, for good reason! */ |
4030 | 0) | |
6720a7fb JB |
4031 | (name) |
4032 | register Lisp_Object name; | |
4033 | { | |
4034 | return Qnil; | |
4035 | } | |
4036 | ||
4037 | /* Kill all processes associated with `buffer'. | |
4038 | If `buffer' is nil, kill all processes. | |
4039 | Since we have no subprocesses, this does nothing. */ | |
4040 | ||
4041 | kill_buffer_processes (buffer) | |
4042 | Lisp_Object buffer; | |
4043 | { | |
4044 | } | |
4045 | ||
4046 | init_process () | |
4047 | { | |
4048 | } | |
4049 | ||
4050 | syms_of_process () | |
4051 | { | |
4052 | defsubr (&Sget_buffer_process); | |
4053 | } | |
4054 | ||
4055 | \f | |
4056 | #endif /* not subprocesses */ |