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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 | |
de282a05 | 113 | Qt nor Qnil but is instead a cons cell (HOSTNAME PORTNUM). */ |
d0d6b7c5 JB |
114 | |
115 | #ifdef HAVE_SOCKETS | |
de282a05 | 116 | #define NETCONN_P(p) (GC_CONSP (XPROCESS (p)->childp)) |
d0d6b7c5 JB |
117 | #else |
118 | #define NETCONN_P(p) 0 | |
119 | #endif /* HAVE_SOCKETS */ | |
120 | ||
121 | /* Define first descriptor number available for subprocesses. */ | |
122 | #ifdef VMS | |
123 | #define FIRST_PROC_DESC 1 | |
124 | #else /* Not VMS */ | |
125 | #define FIRST_PROC_DESC 3 | |
126 | #endif | |
127 | ||
128 | /* Define SIGCHLD as an alias for SIGCLD. There are many conditionals | |
129 | testing SIGCHLD. */ | |
130 | ||
131 | #if !defined (SIGCHLD) && defined (SIGCLD) | |
132 | #define SIGCHLD SIGCLD | |
133 | #endif /* SIGCLD */ | |
134 | ||
135 | #include "syssignal.h" | |
136 | ||
889255b4 | 137 | #include "syswait.h" |
d0d6b7c5 | 138 | |
b062d1fe RM |
139 | extern int errno; |
140 | extern char *strerror (); | |
141 | #ifdef VMS | |
d0d6b7c5 | 142 | extern char *sys_errlist[]; |
b062d1fe | 143 | #endif |
d0d6b7c5 | 144 | |
5f0929a7 RS |
145 | #ifndef HAVE_H_ERRNO |
146 | extern int h_errno; | |
147 | #endif | |
148 | ||
a86928f7 | 149 | #ifndef SYS_SIGLIST_DECLARED |
d0d6b7c5 JB |
150 | #ifndef VMS |
151 | #ifndef BSD4_1 | |
e98d950b | 152 | #ifndef WINDOWSNT |
084fd64a | 153 | #ifndef LINUX |
d0d6b7c5 | 154 | extern char *sys_siglist[]; |
a0e4d3f3 RS |
155 | #endif /* not LINUX */ |
156 | #else /* BSD4_1 */ | |
d0d6b7c5 JB |
157 | char *sys_siglist[] = |
158 | { | |
159 | "bum signal!!", | |
160 | "hangup", | |
161 | "interrupt", | |
162 | "quit", | |
163 | "illegal instruction", | |
164 | "trace trap", | |
165 | "iot instruction", | |
166 | "emt instruction", | |
167 | "floating point exception", | |
168 | "kill", | |
169 | "bus error", | |
170 | "segmentation violation", | |
171 | "bad argument to system call", | |
172 | "write on a pipe with no one to read it", | |
173 | "alarm clock", | |
174 | "software termination signal from kill", | |
175 | "status signal", | |
176 | "sendable stop signal not from tty", | |
177 | "stop signal from tty", | |
178 | "continue a stopped process", | |
179 | "child status has changed", | |
180 | "background read attempted from control tty", | |
181 | "background write attempted from control tty", | |
182 | "input record available at control tty", | |
183 | "exceeded CPU time limit", | |
184 | "exceeded file size limit" | |
185 | }; | |
e98d950b | 186 | #endif /* not WINDOWSNT */ |
d0d6b7c5 JB |
187 | #endif |
188 | #endif /* VMS */ | |
a86928f7 | 189 | #endif /* ! SYS_SIGLIST_DECLARED */ |
d0d6b7c5 | 190 | |
d0d6b7c5 JB |
191 | /* t means use pty, nil means use a pipe, |
192 | maybe other values to come. */ | |
dd2281ae | 193 | static Lisp_Object Vprocess_connection_type; |
d0d6b7c5 JB |
194 | |
195 | #ifdef SKTPAIR | |
196 | #ifndef HAVE_SOCKETS | |
197 | #include <sys/socket.h> | |
198 | #endif | |
199 | #endif /* SKTPAIR */ | |
200 | ||
17d02632 KH |
201 | /* These next two vars are non-static since sysdep.c uses them in the |
202 | emulation of `select'. */ | |
d0d6b7c5 | 203 | /* Number of events of change of status of a process. */ |
17d02632 | 204 | int process_tick; |
d0d6b7c5 | 205 | /* Number of events for which the user or sentinel has been notified. */ |
17d02632 | 206 | int update_tick; |
d0d6b7c5 | 207 | |
5886acf9 | 208 | #include "sysselect.h" |
d0d6b7c5 | 209 | |
583dcae4 | 210 | /* If we support a window system, turn on the code to poll periodically |
44ade2e9 | 211 | to detect C-g. It isn't actually used when doing interrupt input. */ |
583dcae4 | 212 | #ifdef HAVE_WINDOW_SYSTEM |
44ade2e9 RS |
213 | #define POLL_FOR_INPUT |
214 | #endif | |
215 | ||
a69281ff | 216 | /* Mask of bits indicating the descriptors that we wait for input on. */ |
d0d6b7c5 | 217 | |
dd2281ae RS |
218 | static SELECT_TYPE input_wait_mask; |
219 | ||
a69281ff RS |
220 | /* Mask that excludes keyboard input descriptor (s). */ |
221 | ||
222 | static SELECT_TYPE non_keyboard_wait_mask; | |
223 | ||
7d0e672e RS |
224 | /* The largest descriptor currently in use for a process object. */ |
225 | static int max_process_desc; | |
226 | ||
a69281ff RS |
227 | /* The largest descriptor currently in use for keyboard input. */ |
228 | static int max_keyboard_desc; | |
d0d6b7c5 | 229 | |
dd2281ae RS |
230 | /* Nonzero means delete a process right away if it exits. */ |
231 | static int delete_exited_processes; | |
d0d6b7c5 JB |
232 | |
233 | /* Indexed by descriptor, gives the process (if any) for that descriptor */ | |
41f3aa98 | 234 | Lisp_Object chan_process[MAXDESC]; |
d0d6b7c5 JB |
235 | |
236 | /* Alist of elements (NAME . PROCESS) */ | |
41f3aa98 | 237 | Lisp_Object Vprocess_alist; |
d0d6b7c5 JB |
238 | |
239 | /* Buffered-ahead input char from process, indexed by channel. | |
240 | -1 means empty (no char is buffered). | |
241 | Used on sys V where the only way to tell if there is any | |
242 | output from the process is to read at least one char. | |
243 | Always -1 on systems that support FIONREAD. */ | |
244 | ||
e98d950b RS |
245 | /* Don't make static; need to access externally. */ |
246 | int proc_buffered_char[MAXDESC]; | |
dd2281ae RS |
247 | |
248 | static Lisp_Object get_process (); | |
93b4f699 | 249 | |
fb4c3627 | 250 | extern EMACS_TIME timer_check (); |
5de50bfb | 251 | extern int timers_run; |
fb4c3627 | 252 | |
93b4f699 RS |
253 | /* Maximum number of bytes to send to a pty without an eof. */ |
254 | static int pty_max_bytes; | |
3b9a3dfa | 255 | |
875e6b94 KH |
256 | #ifdef HAVE_PTYS |
257 | /* The file name of the pty opened by allocate_pty. */ | |
3b9a3dfa RS |
258 | |
259 | static char pty_name[24]; | |
875e6b94 | 260 | #endif |
d0d6b7c5 JB |
261 | \f |
262 | /* Compute the Lisp form of the process status, p->status, from | |
263 | the numeric status that was returned by `wait'. */ | |
264 | ||
f9738840 JB |
265 | Lisp_Object status_convert (); |
266 | ||
d0d6b7c5 JB |
267 | update_status (p) |
268 | struct Lisp_Process *p; | |
269 | { | |
270 | union { int i; WAITTYPE wt; } u; | |
271 | u.i = XFASTINT (p->raw_status_low) + (XFASTINT (p->raw_status_high) << 16); | |
272 | p->status = status_convert (u.wt); | |
273 | p->raw_status_low = Qnil; | |
274 | p->raw_status_high = Qnil; | |
275 | } | |
276 | ||
91d10fa8 | 277 | /* Convert a process status word in Unix format to |
d0d6b7c5 JB |
278 | the list that we use internally. */ |
279 | ||
280 | Lisp_Object | |
281 | status_convert (w) | |
282 | WAITTYPE w; | |
283 | { | |
284 | if (WIFSTOPPED (w)) | |
285 | return Fcons (Qstop, Fcons (make_number (WSTOPSIG (w)), Qnil)); | |
286 | else if (WIFEXITED (w)) | |
287 | return Fcons (Qexit, Fcons (make_number (WRETCODE (w)), | |
288 | WCOREDUMP (w) ? Qt : Qnil)); | |
289 | else if (WIFSIGNALED (w)) | |
290 | return Fcons (Qsignal, Fcons (make_number (WTERMSIG (w)), | |
291 | WCOREDUMP (w) ? Qt : Qnil)); | |
292 | else | |
293 | return Qrun; | |
294 | } | |
295 | ||
296 | /* Given a status-list, extract the three pieces of information | |
297 | and store them individually through the three pointers. */ | |
298 | ||
299 | void | |
300 | decode_status (l, symbol, code, coredump) | |
301 | Lisp_Object l; | |
302 | Lisp_Object *symbol; | |
303 | int *code; | |
304 | int *coredump; | |
305 | { | |
306 | Lisp_Object tem; | |
307 | ||
bcd69aea | 308 | if (SYMBOLP (l)) |
d0d6b7c5 JB |
309 | { |
310 | *symbol = l; | |
311 | *code = 0; | |
312 | *coredump = 0; | |
313 | } | |
314 | else | |
315 | { | |
316 | *symbol = XCONS (l)->car; | |
317 | tem = XCONS (l)->cdr; | |
318 | *code = XFASTINT (XCONS (tem)->car); | |
f9738840 | 319 | tem = XCONS (tem)->cdr; |
d0d6b7c5 JB |
320 | *coredump = !NILP (tem); |
321 | } | |
322 | } | |
323 | ||
324 | /* Return a string describing a process status list. */ | |
325 | ||
326 | Lisp_Object | |
327 | status_message (status) | |
328 | Lisp_Object status; | |
329 | { | |
330 | Lisp_Object symbol; | |
331 | int code, coredump; | |
332 | Lisp_Object string, string2; | |
333 | ||
334 | decode_status (status, &symbol, &code, &coredump); | |
335 | ||
336 | if (EQ (symbol, Qsignal) || EQ (symbol, Qstop)) | |
337 | { | |
b97ad9ea RS |
338 | char *signame = 0; |
339 | if (code < NSIG) | |
340 | { | |
b0310da4 | 341 | #ifndef VMS |
ed0cae05 RS |
342 | /* Cast to suppress warning if the table has const char *. */ |
343 | signame = (char *) sys_siglist[code]; | |
b0310da4 | 344 | #else |
b97ad9ea | 345 | signame = sys_errlist[code]; |
b0310da4 | 346 | #endif |
b97ad9ea RS |
347 | } |
348 | if (signame == 0) | |
349 | signame = "unknown"; | |
350 | string = build_string (signame); | |
d0d6b7c5 JB |
351 | string2 = build_string (coredump ? " (core dumped)\n" : "\n"); |
352 | XSTRING (string)->data[0] = DOWNCASE (XSTRING (string)->data[0]); | |
353 | return concat2 (string, string2); | |
354 | } | |
355 | else if (EQ (symbol, Qexit)) | |
356 | { | |
357 | if (code == 0) | |
358 | return build_string ("finished\n"); | |
f2980264 | 359 | string = Fnumber_to_string (make_number (code)); |
d0d6b7c5 JB |
360 | string2 = build_string (coredump ? " (core dumped)\n" : "\n"); |
361 | return concat2 (build_string ("exited abnormally with code "), | |
362 | concat2 (string, string2)); | |
363 | } | |
364 | else | |
365 | return Fcopy_sequence (Fsymbol_name (symbol)); | |
366 | } | |
367 | \f | |
368 | #ifdef HAVE_PTYS | |
d0d6b7c5 | 369 | |
875e6b94 KH |
370 | /* Open an available pty, returning a file descriptor. |
371 | Return -1 on failure. | |
372 | The file name of the terminal corresponding to the pty | |
373 | is left in the variable pty_name. */ | |
374 | ||
d0d6b7c5 JB |
375 | int |
376 | allocate_pty () | |
377 | { | |
378 | struct stat stb; | |
379 | register c, i; | |
380 | int fd; | |
381 | ||
32676c08 JB |
382 | /* Some systems name their pseudoterminals so that there are gaps in |
383 | the usual sequence - for example, on HP9000/S700 systems, there | |
384 | are no pseudoterminals with names ending in 'f'. So we wait for | |
385 | three failures in a row before deciding that we've reached the | |
386 | end of the ptys. */ | |
387 | int failed_count = 0; | |
388 | ||
d0d6b7c5 JB |
389 | #ifdef PTY_ITERATION |
390 | PTY_ITERATION | |
391 | #else | |
392 | for (c = FIRST_PTY_LETTER; c <= 'z'; c++) | |
393 | for (i = 0; i < 16; i++) | |
394 | #endif | |
395 | { | |
396 | #ifdef PTY_NAME_SPRINTF | |
397 | PTY_NAME_SPRINTF | |
d0d6b7c5 JB |
398 | #else |
399 | sprintf (pty_name, "/dev/pty%c%x", c, i); | |
d0d6b7c5 JB |
400 | #endif /* no PTY_NAME_SPRINTF */ |
401 | ||
4d7c105e RS |
402 | #ifdef PTY_OPEN |
403 | PTY_OPEN; | |
404 | #else /* no PTY_OPEN */ | |
32676c08 JB |
405 | #ifdef IRIS |
406 | /* Unusual IRIS code */ | |
407 | *ptyv = open ("/dev/ptc", O_RDWR | O_NDELAY, 0); | |
408 | if (fd < 0) | |
409 | return -1; | |
410 | if (fstat (fd, &stb) < 0) | |
d0d6b7c5 | 411 | return -1; |
4d7c105e | 412 | #else /* not IRIS */ |
32676c08 JB |
413 | if (stat (pty_name, &stb) < 0) |
414 | { | |
415 | failed_count++; | |
416 | if (failed_count >= 3) | |
417 | return -1; | |
418 | } | |
419 | else | |
420 | failed_count = 0; | |
d0d6b7c5 JB |
421 | #ifdef O_NONBLOCK |
422 | fd = open (pty_name, O_RDWR | O_NONBLOCK, 0); | |
423 | #else | |
424 | fd = open (pty_name, O_RDWR | O_NDELAY, 0); | |
425 | #endif | |
4d7c105e RS |
426 | #endif /* not IRIS */ |
427 | #endif /* no PTY_OPEN */ | |
d0d6b7c5 JB |
428 | |
429 | if (fd >= 0) | |
430 | { | |
431 | /* check to make certain that both sides are available | |
432 | this avoids a nasty yet stupid bug in rlogins */ | |
433 | #ifdef PTY_TTY_NAME_SPRINTF | |
434 | PTY_TTY_NAME_SPRINTF | |
d0d6b7c5 JB |
435 | #else |
436 | sprintf (pty_name, "/dev/tty%c%x", c, i); | |
d0d6b7c5 JB |
437 | #endif /* no PTY_TTY_NAME_SPRINTF */ |
438 | #ifndef UNIPLUS | |
439 | if (access (pty_name, 6) != 0) | |
440 | { | |
441 | close (fd); | |
fad97cbe | 442 | #if !defined(IRIS) && !defined(__sgi) |
d0d6b7c5 JB |
443 | continue; |
444 | #else | |
445 | return -1; | |
446 | #endif /* IRIS */ | |
447 | } | |
448 | #endif /* not UNIPLUS */ | |
449 | setup_pty (fd); | |
450 | return fd; | |
451 | } | |
452 | } | |
453 | return -1; | |
454 | } | |
455 | #endif /* HAVE_PTYS */ | |
456 | \f | |
457 | Lisp_Object | |
458 | make_process (name) | |
459 | Lisp_Object name; | |
460 | { | |
23d6bb9c | 461 | struct Lisp_Vector *vec; |
d0d6b7c5 JB |
462 | register Lisp_Object val, tem, name1; |
463 | register struct Lisp_Process *p; | |
464 | char suffix[10]; | |
465 | register int i; | |
466 | ||
23d6bb9c KH |
467 | vec = allocate_vectorlike ((EMACS_INT) VECSIZE (struct Lisp_Process)); |
468 | for (i = 0; i < VECSIZE (struct Lisp_Process); i++) | |
469 | vec->contents[i] = Qnil; | |
470 | vec->size = VECSIZE (struct Lisp_Process); | |
471 | p = (struct Lisp_Process *)vec; | |
472 | ||
1d056e64 KH |
473 | XSETINT (p->infd, -1); |
474 | XSETINT (p->outfd, -1); | |
22719df2 KH |
475 | XSETFASTINT (p->pid, 0); |
476 | XSETFASTINT (p->tick, 0); | |
477 | XSETFASTINT (p->update_tick, 0); | |
d0d6b7c5 JB |
478 | p->raw_status_low = Qnil; |
479 | p->raw_status_high = Qnil; | |
480 | p->status = Qrun; | |
481 | p->mark = Fmake_marker (); | |
482 | ||
483 | /* If name is already in use, modify it until it is unused. */ | |
484 | ||
485 | name1 = name; | |
486 | for (i = 1; ; i++) | |
487 | { | |
488 | tem = Fget_process (name1); | |
489 | if (NILP (tem)) break; | |
490 | sprintf (suffix, "<%d>", i); | |
491 | name1 = concat2 (name, build_string (suffix)); | |
492 | } | |
493 | name = name1; | |
494 | p->name = name; | |
23d6bb9c | 495 | XSETPROCESS (val, p); |
d0d6b7c5 JB |
496 | Vprocess_alist = Fcons (Fcons (name, val), Vprocess_alist); |
497 | return val; | |
498 | } | |
499 | ||
500 | remove_process (proc) | |
501 | register Lisp_Object proc; | |
502 | { | |
503 | register Lisp_Object pair; | |
504 | ||
505 | pair = Frassq (proc, Vprocess_alist); | |
506 | Vprocess_alist = Fdelq (pair, Vprocess_alist); | |
d0d6b7c5 JB |
507 | |
508 | deactivate_process (proc); | |
509 | } | |
510 | \f | |
511 | DEFUN ("processp", Fprocessp, Sprocessp, 1, 1, 0, | |
512 | "Return t if OBJECT is a process.") | |
4ee3e309 EN |
513 | (object) |
514 | Lisp_Object object; | |
d0d6b7c5 | 515 | { |
4ee3e309 | 516 | return PROCESSP (object) ? Qt : Qnil; |
d0d6b7c5 JB |
517 | } |
518 | ||
519 | DEFUN ("get-process", Fget_process, Sget_process, 1, 1, 0, | |
520 | "Return the process named NAME, or nil if there is none.") | |
521 | (name) | |
522 | register Lisp_Object name; | |
523 | { | |
bcd69aea | 524 | if (PROCESSP (name)) |
d0d6b7c5 JB |
525 | return name; |
526 | CHECK_STRING (name, 0); | |
527 | return Fcdr (Fassoc (name, Vprocess_alist)); | |
528 | } | |
529 | ||
530 | DEFUN ("get-buffer-process", Fget_buffer_process, Sget_buffer_process, 1, 1, 0, | |
531 | "Return the (or, a) process associated with BUFFER.\n\ | |
532 | BUFFER may be a buffer or the name of one.") | |
4ee3e309 EN |
533 | (buffer) |
534 | register Lisp_Object buffer; | |
d0d6b7c5 JB |
535 | { |
536 | register Lisp_Object buf, tail, proc; | |
537 | ||
4ee3e309 EN |
538 | if (NILP (buffer)) return Qnil; |
539 | buf = Fget_buffer (buffer); | |
d0d6b7c5 JB |
540 | if (NILP (buf)) return Qnil; |
541 | ||
542 | for (tail = Vprocess_alist; !NILP (tail); tail = Fcdr (tail)) | |
543 | { | |
544 | proc = Fcdr (Fcar (tail)); | |
bcd69aea | 545 | if (PROCESSP (proc) && EQ (XPROCESS (proc)->buffer, buf)) |
d0d6b7c5 JB |
546 | return proc; |
547 | } | |
548 | return Qnil; | |
549 | } | |
550 | ||
ebb9e16f JB |
551 | /* This is how commands for the user decode process arguments. It |
552 | accepts a process, a process name, a buffer, a buffer name, or nil. | |
553 | Buffers denote the first process in the buffer, and nil denotes the | |
554 | current buffer. */ | |
d0d6b7c5 | 555 | |
77b221b1 | 556 | static Lisp_Object |
d0d6b7c5 JB |
557 | get_process (name) |
558 | register Lisp_Object name; | |
559 | { | |
1619761d KH |
560 | register Lisp_Object proc, obj; |
561 | if (STRINGP (name)) | |
562 | { | |
563 | obj = Fget_process (name); | |
564 | if (NILP (obj)) | |
565 | obj = Fget_buffer (name); | |
566 | if (NILP (obj)) | |
567 | error ("Process %s does not exist", XSTRING (name)->data); | |
568 | } | |
569 | else if (NILP (name)) | |
570 | obj = Fcurrent_buffer (); | |
d0d6b7c5 | 571 | else |
1619761d KH |
572 | obj = name; |
573 | ||
574 | /* Now obj should be either a buffer object or a process object. | |
575 | */ | |
576 | if (BUFFERP (obj)) | |
d0d6b7c5 | 577 | { |
1619761d | 578 | proc = Fget_buffer_process (obj); |
d0d6b7c5 | 579 | if (NILP (proc)) |
1619761d | 580 | error ("Buffer %s has no process", XSTRING (XBUFFER (obj)->name)->data); |
d0d6b7c5 | 581 | } |
d0d6b7c5 | 582 | else |
1619761d KH |
583 | { |
584 | CHECK_PROCESS (obj, 0); | |
585 | proc = obj; | |
586 | } | |
587 | return proc; | |
d0d6b7c5 JB |
588 | } |
589 | ||
590 | DEFUN ("delete-process", Fdelete_process, Sdelete_process, 1, 1, 0, | |
591 | "Delete PROCESS: kill it and forget about it immediately.\n\ | |
ebb9e16f JB |
592 | PROCESS may be a process, a buffer, the name of a process or buffer, or\n\ |
593 | nil, indicating the current buffer's process.") | |
4ee3e309 EN |
594 | (process) |
595 | register Lisp_Object process; | |
d0d6b7c5 | 596 | { |
4ee3e309 EN |
597 | process = get_process (process); |
598 | XPROCESS (process)->raw_status_low = Qnil; | |
599 | XPROCESS (process)->raw_status_high = Qnil; | |
600 | if (NETCONN_P (process)) | |
d0d6b7c5 | 601 | { |
4ee3e309 EN |
602 | XPROCESS (process)->status = Fcons (Qexit, Fcons (make_number (0), Qnil)); |
603 | XSETINT (XPROCESS (process)->tick, ++process_tick); | |
d0d6b7c5 | 604 | } |
4ee3e309 | 605 | else if (XINT (XPROCESS (process)->infd) >= 0) |
d0d6b7c5 | 606 | { |
4ee3e309 | 607 | Fkill_process (process, Qnil); |
d0d6b7c5 | 608 | /* Do this now, since remove_process will make sigchld_handler do nothing. */ |
4ee3e309 | 609 | XPROCESS (process)->status |
d0d6b7c5 | 610 | = Fcons (Qsignal, Fcons (make_number (SIGKILL), Qnil)); |
4ee3e309 | 611 | XSETINT (XPROCESS (process)->tick, ++process_tick); |
d0d6b7c5 JB |
612 | status_notify (); |
613 | } | |
4ee3e309 | 614 | remove_process (process); |
d0d6b7c5 JB |
615 | return Qnil; |
616 | } | |
617 | \f | |
618 | DEFUN ("process-status", Fprocess_status, Sprocess_status, 1, 1, 0, | |
619 | "Return the status of PROCESS: a symbol, one of these:\n\ | |
620 | run -- for a process that is running.\n\ | |
621 | stop -- for a process stopped but continuable.\n\ | |
622 | exit -- for a process that has exited.\n\ | |
623 | signal -- for a process that has got a fatal signal.\n\ | |
624 | open -- for a network stream connection that is open.\n\ | |
625 | closed -- for a network stream connection that is closed.\n\ | |
ebb9e16f JB |
626 | nil -- if arg is a process name and no such process exists.\n\ |
627 | PROCESS may be a process, a buffer, the name of a process or buffer, or\n\ | |
628 | nil, indicating the current buffer's process.") | |
4ee3e309 EN |
629 | (process) |
630 | register Lisp_Object process; | |
d0d6b7c5 JB |
631 | { |
632 | register struct Lisp_Process *p; | |
633 | register Lisp_Object status; | |
343f4114 | 634 | |
4ee3e309 EN |
635 | if (STRINGP (process)) |
636 | process = Fget_process (process); | |
343f4114 | 637 | else |
4ee3e309 | 638 | process = get_process (process); |
343f4114 | 639 | |
4ee3e309 EN |
640 | if (NILP (process)) |
641 | return process; | |
343f4114 | 642 | |
4ee3e309 | 643 | p = XPROCESS (process); |
d0d6b7c5 JB |
644 | if (!NILP (p->raw_status_low)) |
645 | update_status (p); | |
646 | status = p->status; | |
bcd69aea | 647 | if (CONSP (status)) |
d0d6b7c5 | 648 | status = XCONS (status)->car; |
4ee3e309 | 649 | if (NETCONN_P (process)) |
d0d6b7c5 JB |
650 | { |
651 | if (EQ (status, Qrun)) | |
652 | status = Qopen; | |
653 | else if (EQ (status, Qexit)) | |
654 | status = Qclosed; | |
655 | } | |
656 | return status; | |
657 | } | |
658 | ||
659 | DEFUN ("process-exit-status", Fprocess_exit_status, Sprocess_exit_status, | |
660 | 1, 1, 0, | |
661 | "Return the exit status of PROCESS or the signal number that killed it.\n\ | |
662 | If PROCESS has not yet exited or died, return 0.") | |
4ee3e309 EN |
663 | (process) |
664 | register Lisp_Object process; | |
d0d6b7c5 | 665 | { |
4ee3e309 EN |
666 | CHECK_PROCESS (process, 0); |
667 | if (!NILP (XPROCESS (process)->raw_status_low)) | |
668 | update_status (XPROCESS (process)); | |
669 | if (CONSP (XPROCESS (process)->status)) | |
670 | return XCONS (XCONS (XPROCESS (process)->status)->cdr)->car; | |
d0d6b7c5 JB |
671 | return make_number (0); |
672 | } | |
673 | ||
674 | DEFUN ("process-id", Fprocess_id, Sprocess_id, 1, 1, 0, | |
675 | "Return the process id of PROCESS.\n\ | |
676 | This is the pid of the Unix process which PROCESS uses or talks to.\n\ | |
677 | For a network connection, this value is nil.") | |
4ee3e309 EN |
678 | (process) |
679 | register Lisp_Object process; | |
d0d6b7c5 | 680 | { |
4ee3e309 EN |
681 | CHECK_PROCESS (process, 0); |
682 | return XPROCESS (process)->pid; | |
d0d6b7c5 JB |
683 | } |
684 | ||
685 | DEFUN ("process-name", Fprocess_name, Sprocess_name, 1, 1, 0, | |
686 | "Return the name of PROCESS, as a string.\n\ | |
687 | This is the name of the program invoked in PROCESS,\n\ | |
688 | possibly modified to make it unique among process names.") | |
4ee3e309 EN |
689 | (process) |
690 | register Lisp_Object process; | |
d0d6b7c5 | 691 | { |
4ee3e309 EN |
692 | CHECK_PROCESS (process, 0); |
693 | return XPROCESS (process)->name; | |
d0d6b7c5 JB |
694 | } |
695 | ||
696 | DEFUN ("process-command", Fprocess_command, Sprocess_command, 1, 1, 0, | |
697 | "Return the command that was executed to start PROCESS.\n\ | |
698 | This is a list of strings, the first string being the program executed\n\ | |
699 | and the rest of the strings being the arguments given to it.\n\ | |
700 | For a non-child channel, this is nil.") | |
4ee3e309 EN |
701 | (process) |
702 | register Lisp_Object process; | |
d0d6b7c5 | 703 | { |
4ee3e309 EN |
704 | CHECK_PROCESS (process, 0); |
705 | return XPROCESS (process)->command; | |
d0d6b7c5 JB |
706 | } |
707 | ||
3b9a3dfa RS |
708 | DEFUN ("process-tty-name", Fprocess_tty_name, Sprocess_tty_name, 1, 1, 0, |
709 | "Return the name of the terminal PROCESS uses, or nil if none.\n\ | |
710 | This is the terminal that the process itself reads and writes on,\n\ | |
711 | not the name of the pty that Emacs uses to talk with that terminal.") | |
4ee3e309 EN |
712 | (process) |
713 | register Lisp_Object process; | |
3b9a3dfa | 714 | { |
4ee3e309 EN |
715 | CHECK_PROCESS (process, 0); |
716 | return XPROCESS (process)->tty_name; | |
3b9a3dfa RS |
717 | } |
718 | ||
d0d6b7c5 JB |
719 | DEFUN ("set-process-buffer", Fset_process_buffer, Sset_process_buffer, |
720 | 2, 2, 0, | |
721 | "Set buffer associated with PROCESS to BUFFER (a buffer, or nil).") | |
4ee3e309 EN |
722 | (process, buffer) |
723 | register Lisp_Object process, buffer; | |
d0d6b7c5 | 724 | { |
4ee3e309 | 725 | CHECK_PROCESS (process, 0); |
d0d6b7c5 JB |
726 | if (!NILP (buffer)) |
727 | CHECK_BUFFER (buffer, 1); | |
4ee3e309 | 728 | XPROCESS (process)->buffer = buffer; |
d0d6b7c5 JB |
729 | return buffer; |
730 | } | |
731 | ||
732 | DEFUN ("process-buffer", Fprocess_buffer, Sprocess_buffer, | |
733 | 1, 1, 0, | |
734 | "Return the buffer PROCESS is associated with.\n\ | |
735 | Output from PROCESS is inserted in this buffer\n\ | |
736 | unless PROCESS has a filter.") | |
4ee3e309 EN |
737 | (process) |
738 | register Lisp_Object process; | |
d0d6b7c5 | 739 | { |
4ee3e309 EN |
740 | CHECK_PROCESS (process, 0); |
741 | return XPROCESS (process)->buffer; | |
d0d6b7c5 JB |
742 | } |
743 | ||
744 | DEFUN ("process-mark", Fprocess_mark, Sprocess_mark, | |
745 | 1, 1, 0, | |
746 | "Return the marker for the end of the last output from PROCESS.") | |
4ee3e309 EN |
747 | (process) |
748 | register Lisp_Object process; | |
d0d6b7c5 | 749 | { |
4ee3e309 EN |
750 | CHECK_PROCESS (process, 0); |
751 | return XPROCESS (process)->mark; | |
d0d6b7c5 JB |
752 | } |
753 | ||
754 | DEFUN ("set-process-filter", Fset_process_filter, Sset_process_filter, | |
755 | 2, 2, 0, | |
756 | "Give PROCESS the filter function FILTER; nil means no filter.\n\ | |
20ddfff7 | 757 | t means stop accepting output from the process.\n\ |
d0d6b7c5 JB |
758 | When a process has a filter, each time it does output\n\ |
759 | the entire string of output is passed to the filter.\n\ | |
760 | The filter gets two arguments: the process and the string of output.\n\ | |
761 | If the process has a filter, its buffer is not used for output.") | |
4ee3e309 EN |
762 | (process, filter) |
763 | register Lisp_Object process, filter; | |
d0d6b7c5 | 764 | { |
4ee3e309 | 765 | CHECK_PROCESS (process, 0); |
20ddfff7 | 766 | if (EQ (filter, Qt)) |
a69281ff | 767 | { |
4ee3e309 EN |
768 | FD_CLR (XINT (XPROCESS (process)->infd), &input_wait_mask); |
769 | FD_CLR (XINT (XPROCESS (process)->infd), &non_keyboard_wait_mask); | |
a69281ff | 770 | } |
4ee3e309 | 771 | else if (EQ (XPROCESS (process)->filter, Qt)) |
a69281ff | 772 | { |
4ee3e309 EN |
773 | FD_SET (XINT (XPROCESS (process)->infd), &input_wait_mask); |
774 | FD_SET (XINT (XPROCESS (process)->infd), &non_keyboard_wait_mask); | |
a69281ff | 775 | } |
4ee3e309 | 776 | XPROCESS (process)->filter = filter; |
d0d6b7c5 JB |
777 | return filter; |
778 | } | |
779 | ||
780 | DEFUN ("process-filter", Fprocess_filter, Sprocess_filter, | |
781 | 1, 1, 0, | |
782 | "Returns the filter function of PROCESS; nil if none.\n\ | |
783 | See `set-process-filter' for more info on filter functions.") | |
4ee3e309 EN |
784 | (process) |
785 | register Lisp_Object process; | |
d0d6b7c5 | 786 | { |
4ee3e309 EN |
787 | CHECK_PROCESS (process, 0); |
788 | return XPROCESS (process)->filter; | |
d0d6b7c5 JB |
789 | } |
790 | ||
791 | DEFUN ("set-process-sentinel", Fset_process_sentinel, Sset_process_sentinel, | |
792 | 2, 2, 0, | |
793 | "Give PROCESS the sentinel SENTINEL; nil for none.\n\ | |
794 | The sentinel is called as a function when the process changes state.\n\ | |
795 | It gets two arguments: the process, and a string describing the change.") | |
4ee3e309 EN |
796 | (process, sentinel) |
797 | register Lisp_Object process, sentinel; | |
d0d6b7c5 | 798 | { |
4ee3e309 EN |
799 | CHECK_PROCESS (process, 0); |
800 | XPROCESS (process)->sentinel = sentinel; | |
d0d6b7c5 JB |
801 | return sentinel; |
802 | } | |
803 | ||
804 | DEFUN ("process-sentinel", Fprocess_sentinel, Sprocess_sentinel, | |
805 | 1, 1, 0, | |
806 | "Return the sentinel of PROCESS; nil if none.\n\ | |
807 | See `set-process-sentinel' for more info on sentinels.") | |
4ee3e309 EN |
808 | (process) |
809 | register Lisp_Object process; | |
d0d6b7c5 | 810 | { |
4ee3e309 EN |
811 | CHECK_PROCESS (process, 0); |
812 | return XPROCESS (process)->sentinel; | |
d0d6b7c5 JB |
813 | } |
814 | ||
396df322 RS |
815 | DEFUN ("set-process-window-size", Fset_process_window_size, |
816 | Sset_process_window_size, 3, 3, 0, | |
817 | "Tell PROCESS that it has logical window size HEIGHT and WIDTH.") | |
4ee3e309 EN |
818 | (process, height, width) |
819 | register Lisp_Object process, height, width; | |
396df322 | 820 | { |
4ee3e309 | 821 | CHECK_PROCESS (process, 0); |
396df322 RS |
822 | CHECK_NATNUM (height, 0); |
823 | CHECK_NATNUM (width, 0); | |
4ee3e309 | 824 | if (set_window_size (XINT (XPROCESS (process)->infd), |
396df322 RS |
825 | XINT (height), XINT(width)) <= 0) |
826 | return Qnil; | |
827 | else | |
828 | return Qt; | |
829 | } | |
830 | ||
d0d6b7c5 JB |
831 | DEFUN ("process-kill-without-query", Fprocess_kill_without_query, |
832 | Sprocess_kill_without_query, 1, 2, 0, | |
833 | "Say no query needed if PROCESS is running when Emacs is exited.\n\ | |
f2d2dbfe | 834 | Optional second argument if non-nil says to require a query.\n\ |
d0d6b7c5 | 835 | Value is t if a query was formerly required.") |
4ee3e309 EN |
836 | (process, value) |
837 | register Lisp_Object process, value; | |
d0d6b7c5 JB |
838 | { |
839 | Lisp_Object tem; | |
840 | ||
4ee3e309 EN |
841 | CHECK_PROCESS (process, 0); |
842 | tem = XPROCESS (process)->kill_without_query; | |
843 | XPROCESS (process)->kill_without_query = Fnull (value); | |
d0d6b7c5 JB |
844 | |
845 | return Fnull (tem); | |
846 | } | |
312c9964 | 847 | |
de282a05 RS |
848 | DEFUN ("process-contact", Fprocess_contact, Sprocess_contact, |
849 | 1, 1, 0, | |
850 | "Return the contact info of PROCESS; t for a real child.\n\ | |
851 | For a net connection, the value is a cons cell of the form (HOST SERVICE).") | |
852 | (process) | |
853 | register Lisp_Object process; | |
854 | { | |
855 | CHECK_PROCESS (process, 0); | |
856 | return XPROCESS (process)->childp; | |
857 | } | |
858 | ||
312c9964 RS |
859 | #if 0 /* Turned off because we don't currently record this info |
860 | in the process. Perhaps add it. */ | |
861 | DEFUN ("process-connection", Fprocess_connection, Sprocess_connection, 1, 1, 0, | |
862 | "Return the connection type of `PROCESS'.\n\ | |
863 | The value is `nil' for a pipe,\n\ | |
864 | `t' or `pty' for a pty, or `stream' for a socket connection.") | |
865 | (process) | |
866 | Lisp_Object process; | |
867 | { | |
868 | return XPROCESS (process)->type; | |
869 | } | |
870 | #endif | |
d0d6b7c5 JB |
871 | \f |
872 | Lisp_Object | |
873 | list_processes_1 () | |
874 | { | |
875 | register Lisp_Object tail, tem; | |
876 | Lisp_Object proc, minspace, tem1; | |
877 | register struct buffer *old = current_buffer; | |
878 | register struct Lisp_Process *p; | |
879 | register int state; | |
880 | char tembuf[80]; | |
881 | ||
22719df2 | 882 | XSETFASTINT (minspace, 1); |
d0d6b7c5 JB |
883 | |
884 | set_buffer_internal (XBUFFER (Vstandard_output)); | |
885 | Fbuffer_disable_undo (Vstandard_output); | |
886 | ||
887 | current_buffer->truncate_lines = Qt; | |
888 | ||
889 | write_string ("\ | |
a9fde32e KH |
890 | Proc Status Buffer Tty Command\n\ |
891 | ---- ------ ------ --- -------\n", -1); | |
d0d6b7c5 JB |
892 | |
893 | for (tail = Vprocess_alist; !NILP (tail); tail = Fcdr (tail)) | |
894 | { | |
895 | Lisp_Object symbol; | |
896 | ||
897 | proc = Fcdr (Fcar (tail)); | |
898 | p = XPROCESS (proc); | |
899 | if (NILP (p->childp)) | |
900 | continue; | |
901 | ||
902 | Finsert (1, &p->name); | |
903 | Findent_to (make_number (13), minspace); | |
904 | ||
905 | if (!NILP (p->raw_status_low)) | |
906 | update_status (p); | |
907 | symbol = p->status; | |
bcd69aea | 908 | if (CONSP (p->status)) |
d0d6b7c5 JB |
909 | symbol = XCONS (p->status)->car; |
910 | ||
911 | ||
912 | if (EQ (symbol, Qsignal)) | |
913 | { | |
914 | Lisp_Object tem; | |
915 | tem = Fcar (Fcdr (p->status)); | |
916 | #ifdef VMS | |
917 | if (XINT (tem) < NSIG) | |
b0310da4 | 918 | write_string (sys_errlist [XINT (tem)], -1); |
d0d6b7c5 JB |
919 | else |
920 | #endif | |
921 | Fprinc (symbol, Qnil); | |
922 | } | |
923 | else if (NETCONN_P (proc)) | |
924 | { | |
925 | if (EQ (symbol, Qrun)) | |
926 | write_string ("open", -1); | |
927 | else if (EQ (symbol, Qexit)) | |
928 | write_string ("closed", -1); | |
929 | else | |
930 | Fprinc (symbol, Qnil); | |
931 | } | |
932 | else | |
933 | Fprinc (symbol, Qnil); | |
934 | ||
935 | if (EQ (symbol, Qexit)) | |
936 | { | |
937 | Lisp_Object tem; | |
938 | tem = Fcar (Fcdr (p->status)); | |
939 | if (XFASTINT (tem)) | |
940 | { | |
3162bafa | 941 | sprintf (tembuf, " %d", (int) XFASTINT (tem)); |
d0d6b7c5 JB |
942 | write_string (tembuf, -1); |
943 | } | |
944 | } | |
945 | ||
946 | if (EQ (symbol, Qsignal) || EQ (symbol, Qexit)) | |
947 | remove_process (proc); | |
948 | ||
949 | Findent_to (make_number (22), minspace); | |
950 | if (NILP (p->buffer)) | |
951 | insert_string ("(none)"); | |
952 | else if (NILP (XBUFFER (p->buffer)->name)) | |
953 | insert_string ("(Killed)"); | |
954 | else | |
955 | Finsert (1, &XBUFFER (p->buffer)->name); | |
956 | ||
957 | Findent_to (make_number (37), minspace); | |
958 | ||
a9fde32e KH |
959 | if (STRINGP (p->tty_name)) |
960 | Finsert (1, &p->tty_name); | |
961 | else | |
962 | insert_string ("(none)"); | |
963 | ||
964 | Findent_to (make_number (49), minspace); | |
965 | ||
d0d6b7c5 JB |
966 | if (NETCONN_P (proc)) |
967 | { | |
968 | sprintf (tembuf, "(network stream connection to %s)\n", | |
de282a05 | 969 | XSTRING (XCONS (p->childp)->car)->data); |
d0d6b7c5 JB |
970 | insert_string (tembuf); |
971 | } | |
972 | else | |
973 | { | |
974 | tem = p->command; | |
975 | while (1) | |
976 | { | |
977 | tem1 = Fcar (tem); | |
978 | Finsert (1, &tem1); | |
979 | tem = Fcdr (tem); | |
980 | if (NILP (tem)) | |
981 | break; | |
982 | insert_string (" "); | |
983 | } | |
984 | insert_string ("\n"); | |
985 | } | |
986 | } | |
987 | return Qnil; | |
988 | } | |
989 | ||
990 | DEFUN ("list-processes", Flist_processes, Slist_processes, 0, 0, "", | |
991 | "Display a list of all processes.\n\ | |
992 | \(Any processes listed as Exited or Signaled are actually eliminated\n\ | |
993 | after the listing is made.)") | |
994 | () | |
995 | { | |
996 | internal_with_output_to_temp_buffer ("*Process List*", | |
997 | list_processes_1, Qnil); | |
998 | return Qnil; | |
999 | } | |
1000 | ||
1001 | DEFUN ("process-list", Fprocess_list, Sprocess_list, 0, 0, 0, | |
1002 | "Return a list of all processes.") | |
1003 | () | |
1004 | { | |
1005 | return Fmapcar (Qcdr, Vprocess_alist); | |
1006 | } | |
1007 | \f | |
b0310da4 JB |
1008 | /* Starting asynchronous inferior processes. */ |
1009 | ||
1010 | static Lisp_Object start_process_unwind (); | |
1011 | ||
d0d6b7c5 JB |
1012 | DEFUN ("start-process", Fstart_process, Sstart_process, 3, MANY, 0, |
1013 | "Start a program in a subprocess. Return the process object for it.\n\ | |
1014 | Args are NAME BUFFER PROGRAM &rest PROGRAM-ARGS\n\ | |
1015 | NAME is name for process. It is modified if necessary to make it unique.\n\ | |
1016 | BUFFER is the buffer or (buffer-name) to associate with the process.\n\ | |
1017 | Process output goes at end of that buffer, unless you specify\n\ | |
1018 | an output stream or filter function to handle the output.\n\ | |
1019 | BUFFER may be also nil, meaning that this process is not associated\n\ | |
1020 | with any buffer\n\ | |
1021 | Third arg is program file name. It is searched for as in the shell.\n\ | |
1022 | Remaining arguments are strings to give program as arguments.") | |
1023 | (nargs, args) | |
1024 | int nargs; | |
1025 | register Lisp_Object *args; | |
1026 | { | |
1e30af70 | 1027 | Lisp_Object buffer, name, program, proc, current_dir, tem; |
d0d6b7c5 JB |
1028 | #ifdef VMS |
1029 | register unsigned char *new_argv; | |
1030 | int len; | |
1031 | #else | |
1032 | register unsigned char **new_argv; | |
1033 | #endif | |
1034 | register int i; | |
b0310da4 | 1035 | int count = specpdl_ptr - specpdl; |
d0d6b7c5 JB |
1036 | |
1037 | buffer = args[1]; | |
1038 | if (!NILP (buffer)) | |
1039 | buffer = Fget_buffer_create (buffer); | |
1040 | ||
1e30af70 JB |
1041 | /* Make sure that the child will be able to chdir to the current |
1042 | buffer's current directory, or its unhandled equivalent. We | |
1043 | can't just have the child check for an error when it does the | |
1044 | chdir, since it's in a vfork. | |
1045 | ||
1046 | We have to GCPRO around this because Fexpand_file_name and | |
1047 | Funhandled_file_name_directory might call a file name handling | |
1048 | function. The argument list is protected by the caller, so all | |
1049 | we really have to worry about is buffer. */ | |
1050 | { | |
1051 | struct gcpro gcpro1, gcpro2; | |
1052 | ||
1053 | current_dir = current_buffer->directory; | |
1054 | ||
1055 | GCPRO2 (buffer, current_dir); | |
1056 | ||
7af71e17 RS |
1057 | current_dir |
1058 | = expand_and_dir_to_file (Funhandled_file_name_directory (current_dir), | |
1059 | Qnil); | |
1e30af70 JB |
1060 | if (NILP (Ffile_accessible_directory_p (current_dir))) |
1061 | report_file_error ("Setting current directory", | |
1062 | Fcons (current_buffer->directory, Qnil)); | |
1063 | ||
1064 | UNGCPRO; | |
1065 | } | |
1066 | ||
d0d6b7c5 JB |
1067 | name = args[0]; |
1068 | CHECK_STRING (name, 0); | |
1069 | ||
1070 | program = args[2]; | |
1071 | ||
1072 | CHECK_STRING (program, 2); | |
1073 | ||
1074 | #ifdef VMS | |
1075 | /* Make a one member argv with all args concatenated | |
1076 | together separated by a blank. */ | |
1077 | len = XSTRING (program)->size + 2; | |
1078 | for (i = 3; i < nargs; i++) | |
1079 | { | |
1080 | tem = args[i]; | |
1081 | CHECK_STRING (tem, i); | |
1082 | len += XSTRING (tem)->size + 1; /* count the blank */ | |
1083 | } | |
1084 | new_argv = (unsigned char *) alloca (len); | |
1085 | strcpy (new_argv, XSTRING (program)->data); | |
1086 | for (i = 3; i < nargs; i++) | |
1087 | { | |
1088 | tem = args[i]; | |
1089 | CHECK_STRING (tem, i); | |
1090 | strcat (new_argv, " "); | |
1091 | strcat (new_argv, XSTRING (tem)->data); | |
1092 | } | |
b0310da4 JB |
1093 | /* Need to add code here to check for program existence on VMS */ |
1094 | ||
d0d6b7c5 JB |
1095 | #else /* not VMS */ |
1096 | new_argv = (unsigned char **) alloca ((nargs - 1) * sizeof (char *)); | |
1097 | ||
d0d6b7c5 | 1098 | /* If program file name is not absolute, search our path for it */ |
e98d950b RS |
1099 | if (!IS_DIRECTORY_SEP (XSTRING (program)->data[0]) |
1100 | && !(XSTRING (program)->size > 1 | |
1101 | && IS_DEVICE_SEP (XSTRING (program)->data[1]))) | |
d0d6b7c5 | 1102 | { |
3b639868 KH |
1103 | struct gcpro gcpro1, gcpro2, gcpro3, gcpro4; |
1104 | ||
d0d6b7c5 | 1105 | tem = Qnil; |
3b639868 | 1106 | GCPRO4 (name, program, buffer, current_dir); |
5437e9f9 | 1107 | openp (Vexec_path, program, EXEC_SUFFIXES, &tem, 1); |
3b639868 | 1108 | UNGCPRO; |
d0d6b7c5 JB |
1109 | if (NILP (tem)) |
1110 | report_file_error ("Searching for program", Fcons (program, Qnil)); | |
f8a87498 | 1111 | tem = Fexpand_file_name (tem, Qnil); |
d0d6b7c5 JB |
1112 | new_argv[0] = XSTRING (tem)->data; |
1113 | } | |
3b639868 | 1114 | else |
13373f4e RS |
1115 | { |
1116 | if (!NILP (Ffile_directory_p (program))) | |
1117 | error ("Specified program for new process is a directory"); | |
1118 | ||
1119 | new_argv[0] = XSTRING (program)->data; | |
1120 | } | |
3b639868 KH |
1121 | |
1122 | for (i = 3; i < nargs; i++) | |
1123 | { | |
1124 | tem = args[i]; | |
1125 | CHECK_STRING (tem, i); | |
1126 | new_argv[i - 2] = XSTRING (tem)->data; | |
1127 | } | |
1128 | new_argv[i - 2] = 0; | |
d0d6b7c5 JB |
1129 | #endif /* not VMS */ |
1130 | ||
1131 | proc = make_process (name); | |
b0310da4 JB |
1132 | /* If an error occurs and we can't start the process, we want to |
1133 | remove it from the process list. This means that each error | |
1134 | check in create_process doesn't need to call remove_process | |
1135 | itself; it's all taken care of here. */ | |
1136 | record_unwind_protect (start_process_unwind, proc); | |
d0d6b7c5 JB |
1137 | |
1138 | XPROCESS (proc)->childp = Qt; | |
1139 | XPROCESS (proc)->command_channel_p = Qnil; | |
1140 | XPROCESS (proc)->buffer = buffer; | |
1141 | XPROCESS (proc)->sentinel = Qnil; | |
1142 | XPROCESS (proc)->filter = Qnil; | |
1143 | XPROCESS (proc)->command = Flist (nargs - 2, args + 2); | |
1144 | ||
7af71e17 RS |
1145 | /* Make the process marker point into the process buffer (if any). */ |
1146 | if (!NILP (buffer)) | |
1147 | Fset_marker (XPROCESS (proc)->mark, | |
1148 | make_number (BUF_ZV (XBUFFER (buffer))), buffer); | |
1149 | ||
1e30af70 | 1150 | create_process (proc, new_argv, current_dir); |
d0d6b7c5 | 1151 | |
b0310da4 | 1152 | return unbind_to (count, proc); |
d0d6b7c5 JB |
1153 | } |
1154 | ||
b0310da4 | 1155 | /* This function is the unwind_protect form for Fstart_process. If |
8e6208c5 | 1156 | PROC doesn't have its pid set, then we know someone has signaled |
b0310da4 JB |
1157 | an error and the process wasn't started successfully, so we should |
1158 | remove it from the process list. */ | |
1159 | static Lisp_Object | |
1160 | start_process_unwind (proc) | |
1161 | Lisp_Object proc; | |
1162 | { | |
bcd69aea | 1163 | if (!PROCESSP (proc)) |
b0310da4 JB |
1164 | abort (); |
1165 | ||
1166 | /* Was PROC started successfully? */ | |
188d6c4e | 1167 | if (XINT (XPROCESS (proc)->pid) <= 0) |
b0310da4 JB |
1168 | remove_process (proc); |
1169 | ||
1170 | return Qnil; | |
1171 | } | |
1172 | ||
1173 | ||
d0d6b7c5 JB |
1174 | SIGTYPE |
1175 | create_process_1 (signo) | |
1176 | int signo; | |
1177 | { | |
3c0ee47b | 1178 | #if defined (USG) && !defined (POSIX_SIGNALS) |
d0d6b7c5 JB |
1179 | /* USG systems forget handlers when they are used; |
1180 | must reestablish each time */ | |
1181 | signal (signo, create_process_1); | |
1182 | #endif /* USG */ | |
1183 | } | |
1184 | ||
1185 | #if 0 /* This doesn't work; see the note before sigchld_handler. */ | |
1186 | #ifdef USG | |
1187 | #ifdef SIGCHLD | |
1188 | /* Mimic blocking of signals on system V, which doesn't really have it. */ | |
1189 | ||
1190 | /* Nonzero means we got a SIGCHLD when it was supposed to be blocked. */ | |
1191 | int sigchld_deferred; | |
1192 | ||
1193 | SIGTYPE | |
1194 | create_process_sigchld () | |
1195 | { | |
1196 | signal (SIGCHLD, create_process_sigchld); | |
1197 | ||
1198 | sigchld_deferred = 1; | |
1199 | } | |
1200 | #endif | |
1201 | #endif | |
1202 | #endif | |
1203 | ||
1204 | #ifndef VMS /* VMS version of this function is in vmsproc.c. */ | |
1e30af70 | 1205 | create_process (process, new_argv, current_dir) |
d0d6b7c5 JB |
1206 | Lisp_Object process; |
1207 | char **new_argv; | |
1e30af70 | 1208 | Lisp_Object current_dir; |
d0d6b7c5 | 1209 | { |
ecd1f654 | 1210 | int pid, inchannel, outchannel; |
d0d6b7c5 | 1211 | int sv[2]; |
0dc70c33 KH |
1212 | #ifdef POSIX_SIGNALS |
1213 | sigset_t procmask; | |
1214 | sigset_t blocked; | |
1215 | struct sigaction sigint_action; | |
1216 | struct sigaction sigquit_action; | |
1217 | #ifdef AIX | |
1218 | struct sigaction sighup_action; | |
1219 | #endif | |
1220 | #else /* !POSIX_SIGNALS */ | |
d0d6b7c5 JB |
1221 | #ifdef SIGCHLD |
1222 | SIGTYPE (*sigchld)(); | |
1223 | #endif | |
0dc70c33 | 1224 | #endif /* !POSIX_SIGNALS */ |
ecd1f654 KH |
1225 | /* Use volatile to protect variables from being clobbered by longjmp. */ |
1226 | volatile int forkin, forkout; | |
1227 | volatile int pty_flag = 0; | |
d0d6b7c5 JB |
1228 | extern char **environ; |
1229 | ||
d0d6b7c5 JB |
1230 | inchannel = outchannel = -1; |
1231 | ||
1232 | #ifdef HAVE_PTYS | |
fe45da4e | 1233 | if (!NILP (Vprocess_connection_type)) |
d0d6b7c5 JB |
1234 | outchannel = inchannel = allocate_pty (); |
1235 | ||
d0d6b7c5 JB |
1236 | if (inchannel >= 0) |
1237 | { | |
1238 | #ifndef USG | |
1239 | /* On USG systems it does not work to open the pty's tty here | |
1240 | and then close and reopen it in the child. */ | |
1241 | #ifdef O_NOCTTY | |
1242 | /* Don't let this terminal become our controlling terminal | |
1243 | (in case we don't have one). */ | |
1244 | forkout = forkin = open (pty_name, O_RDWR | O_NOCTTY, 0); | |
1245 | #else | |
1246 | forkout = forkin = open (pty_name, O_RDWR, 0); | |
1247 | #endif | |
1248 | if (forkin < 0) | |
1249 | report_file_error ("Opening pty", Qnil); | |
1250 | #else | |
1251 | forkin = forkout = -1; | |
1252 | #endif /* not USG */ | |
1253 | pty_flag = 1; | |
1254 | } | |
1255 | else | |
1256 | #endif /* HAVE_PTYS */ | |
1257 | #ifdef SKTPAIR | |
1258 | { | |
1259 | if (socketpair (AF_UNIX, SOCK_STREAM, 0, sv) < 0) | |
1260 | report_file_error ("Opening socketpair", Qnil); | |
1261 | outchannel = inchannel = sv[0]; | |
1262 | forkout = forkin = sv[1]; | |
1263 | } | |
1264 | #else /* not SKTPAIR */ | |
1265 | { | |
1266 | pipe (sv); | |
1267 | inchannel = sv[0]; | |
1268 | forkout = sv[1]; | |
1269 | pipe (sv); | |
1270 | outchannel = sv[1]; | |
1271 | forkin = sv[0]; | |
1272 | } | |
1273 | #endif /* not SKTPAIR */ | |
1274 | ||
1275 | #if 0 | |
1276 | /* Replaced by close_process_descs */ | |
1277 | set_exclusive_use (inchannel); | |
1278 | set_exclusive_use (outchannel); | |
1279 | #endif | |
1280 | ||
1281 | /* Stride people say it's a mystery why this is needed | |
1282 | as well as the O_NDELAY, but that it fails without this. */ | |
1283 | #if defined (STRIDE) || (defined (pfa) && defined (HAVE_PTYS)) | |
1284 | { | |
1285 | int one = 1; | |
1286 | ioctl (inchannel, FIONBIO, &one); | |
1287 | } | |
1288 | #endif | |
1289 | ||
1290 | #ifdef O_NONBLOCK | |
1291 | fcntl (inchannel, F_SETFL, O_NONBLOCK); | |
03832893 | 1292 | fcntl (outchannel, F_SETFL, O_NONBLOCK); |
d0d6b7c5 JB |
1293 | #else |
1294 | #ifdef O_NDELAY | |
1295 | fcntl (inchannel, F_SETFL, O_NDELAY); | |
03832893 | 1296 | fcntl (outchannel, F_SETFL, O_NDELAY); |
d0d6b7c5 JB |
1297 | #endif |
1298 | #endif | |
1299 | ||
1300 | /* Record this as an active process, with its channels. | |
1301 | As a result, child_setup will close Emacs's side of the pipes. */ | |
1302 | chan_process[inchannel] = process; | |
1d056e64 KH |
1303 | XSETINT (XPROCESS (process)->infd, inchannel); |
1304 | XSETINT (XPROCESS (process)->outfd, outchannel); | |
d0d6b7c5 JB |
1305 | /* Record the tty descriptor used in the subprocess. */ |
1306 | if (forkin < 0) | |
1307 | XPROCESS (process)->subtty = Qnil; | |
1308 | else | |
22719df2 | 1309 | XSETFASTINT (XPROCESS (process)->subtty, forkin); |
d0d6b7c5 JB |
1310 | XPROCESS (process)->pty_flag = (pty_flag ? Qt : Qnil); |
1311 | XPROCESS (process)->status = Qrun; | |
1312 | ||
1313 | /* Delay interrupts until we have a chance to store | |
1314 | the new fork's pid in its process structure */ | |
0dc70c33 KH |
1315 | #ifdef POSIX_SIGNALS |
1316 | sigemptyset (&blocked); | |
1317 | #ifdef SIGCHLD | |
1318 | sigaddset (&blocked, SIGCHLD); | |
1319 | #endif | |
1320 | #ifdef HAVE_VFORK | |
1321 | /* On many hosts (e.g. Solaris 2.4), if a vforked child calls `signal', | |
1322 | this sets the parent's signal handlers as well as the child's. | |
1323 | So delay all interrupts whose handlers the child might munge, | |
1324 | and record the current handlers so they can be restored later. */ | |
1325 | sigaddset (&blocked, SIGINT ); sigaction (SIGINT , 0, &sigint_action ); | |
1326 | sigaddset (&blocked, SIGQUIT); sigaction (SIGQUIT, 0, &sigquit_action); | |
1327 | #ifdef AIX | |
1328 | sigaddset (&blocked, SIGHUP ); sigaction (SIGHUP , 0, &sighup_action ); | |
1329 | #endif | |
1330 | #endif /* HAVE_VFORK */ | |
1331 | sigprocmask (SIG_BLOCK, &blocked, &procmask); | |
1332 | #else /* !POSIX_SIGNALS */ | |
d0d6b7c5 JB |
1333 | #ifdef SIGCHLD |
1334 | #ifdef BSD4_1 | |
1335 | sighold (SIGCHLD); | |
1336 | #else /* not BSD4_1 */ | |
1337 | #if defined (BSD) || defined (UNIPLUS) || defined (HPUX) | |
1338 | sigsetmask (sigmask (SIGCHLD)); | |
1339 | #else /* ordinary USG */ | |
1340 | #if 0 | |
1341 | sigchld_deferred = 0; | |
1342 | sigchld = signal (SIGCHLD, create_process_sigchld); | |
1343 | #endif | |
1344 | #endif /* ordinary USG */ | |
1345 | #endif /* not BSD4_1 */ | |
1346 | #endif /* SIGCHLD */ | |
0dc70c33 | 1347 | #endif /* !POSIX_SIGNALS */ |
d0d6b7c5 | 1348 | |
3081bf8d | 1349 | FD_SET (inchannel, &input_wait_mask); |
a69281ff | 1350 | FD_SET (inchannel, &non_keyboard_wait_mask); |
3081bf8d KH |
1351 | if (inchannel > max_process_desc) |
1352 | max_process_desc = inchannel; | |
1353 | ||
d0d6b7c5 JB |
1354 | /* Until we store the proper pid, enable sigchld_handler |
1355 | to recognize an unknown pid as standing for this process. | |
1356 | It is very important not to let this `marker' value stay | |
1357 | in the table after this function has returned; if it does | |
1358 | it might cause call-process to hang and subsequent asynchronous | |
1359 | processes to get their return values scrambled. */ | |
1360 | XSETINT (XPROCESS (process)->pid, -1); | |
1361 | ||
1362 | { | |
1363 | /* child_setup must clobber environ on systems with true vfork. | |
1364 | Protect it from permanent change. */ | |
1365 | char **save_environ = environ; | |
1366 | ||
e98d950b | 1367 | #ifndef WINDOWSNT |
d0d6b7c5 JB |
1368 | pid = vfork (); |
1369 | if (pid == 0) | |
e98d950b | 1370 | #endif /* not WINDOWSNT */ |
d0d6b7c5 JB |
1371 | { |
1372 | int xforkin = forkin; | |
1373 | int xforkout = forkout; | |
1374 | ||
1375 | #if 0 /* This was probably a mistake--it duplicates code later on, | |
1376 | but fails to handle all the cases. */ | |
1377 | /* Make sure SIGCHLD is not blocked in the child. */ | |
1378 | sigsetmask (SIGEMPTYMASK); | |
1379 | #endif | |
1380 | ||
1381 | /* Make the pty be the controlling terminal of the process. */ | |
1382 | #ifdef HAVE_PTYS | |
1383 | /* First, disconnect its current controlling terminal. */ | |
1384 | #ifdef HAVE_SETSID | |
7ce48618 RS |
1385 | /* We tried doing setsid only if pty_flag, but it caused |
1386 | process_set_signal to fail on SGI when using a pipe. */ | |
1387 | setsid (); | |
ce4c9c90 | 1388 | /* Make the pty's terminal the controlling terminal. */ |
084fd64a | 1389 | if (pty_flag) |
39e9ebcd | 1390 | { |
39e9ebcd RS |
1391 | #ifdef TIOCSCTTY |
1392 | /* We ignore the return value | |
1393 | because faith@cs.unc.edu says that is necessary on Linux. */ | |
1394 | ioctl (xforkin, TIOCSCTTY, 0); | |
ce4c9c90 | 1395 | #endif |
39e9ebcd | 1396 | } |
d0d6b7c5 | 1397 | #else /* not HAVE_SETSID */ |
c14e53a4 | 1398 | #ifdef USG |
000ab717 | 1399 | /* It's very important to call setpgrp here and no time |
d0d6b7c5 JB |
1400 | afterwards. Otherwise, we lose our controlling tty which |
1401 | is set when we open the pty. */ | |
1402 | setpgrp (); | |
1403 | #endif /* USG */ | |
1404 | #endif /* not HAVE_SETSID */ | |
9bcf8ec6 KH |
1405 | #if defined (HAVE_TERMIOS) && defined (LDISC1) |
1406 | if (pty_flag && xforkin >= 0) | |
1407 | { | |
1408 | struct termios t; | |
1409 | tcgetattr (xforkin, &t); | |
1410 | t.c_lflag = LDISC1; | |
1411 | if (tcsetattr (xforkin, TCSANOW, &t) < 0) | |
1412 | write (1, "create_process/tcsetattr LDISC1 failed\n", 39); | |
1413 | } | |
1414 | #else | |
aafadd9f | 1415 | #if defined (NTTYDISC) && defined (TIOCSETD) |
ff773a4e | 1416 | if (pty_flag && xforkin >= 0) |
afc549fd RS |
1417 | { |
1418 | /* Use new line discipline. */ | |
1419 | int ldisc = NTTYDISC; | |
4458f555 | 1420 | ioctl (xforkin, TIOCSETD, &ldisc); |
afc549fd | 1421 | } |
000ab717 | 1422 | #endif |
9bcf8ec6 | 1423 | #endif |
d0d6b7c5 JB |
1424 | #ifdef TIOCNOTTY |
1425 | /* In 4.3BSD, the TIOCSPGRP bug has been fixed, and now you | |
1426 | can do TIOCSPGRP only to the process's controlling tty. */ | |
1427 | if (pty_flag) | |
1428 | { | |
1429 | /* I wonder: would just ioctl (0, TIOCNOTTY, 0) work here? | |
1430 | I can't test it since I don't have 4.3. */ | |
1431 | int j = open ("/dev/tty", O_RDWR, 0); | |
1432 | ioctl (j, TIOCNOTTY, 0); | |
1433 | close (j); | |
5a570e37 | 1434 | #ifndef USG |
d0d6b7c5 JB |
1435 | /* In order to get a controlling terminal on some versions |
1436 | of BSD, it is necessary to put the process in pgrp 0 | |
1437 | before it opens the terminal. */ | |
99c1aeca | 1438 | #ifdef HAVE_SETPGID |
3ea1d291 RS |
1439 | setpgid (0, 0); |
1440 | #else | |
d0d6b7c5 | 1441 | setpgrp (0, 0); |
3ea1d291 | 1442 | #endif |
d0d6b7c5 JB |
1443 | #endif |
1444 | } | |
1445 | #endif /* TIOCNOTTY */ | |
1446 | ||
99153b9e | 1447 | #if !defined (RTU) && !defined (UNIPLUS) && !defined (DONT_REOPEN_PTY) |
d0d6b7c5 | 1448 | /*** There is a suggestion that this ought to be a |
99153b9e RS |
1449 | conditional on TIOCSPGRP, |
1450 | or !(defined (HAVE_SETSID) && defined (TIOCSCTTY)). | |
1451 | Trying the latter gave the wrong results on Debian GNU/Linux 1.1; | |
1452 | that system does seem to need this code, even though | |
1453 | both HAVE_SETSID and TIOCSCTTY are defined. */ | |
d0d6b7c5 JB |
1454 | /* Now close the pty (if we had it open) and reopen it. |
1455 | This makes the pty the controlling terminal of the subprocess. */ | |
1456 | if (pty_flag) | |
1457 | { | |
99e3d726 RS |
1458 | #ifdef SET_CHILD_PTY_PGRP |
1459 | int pgrp = getpid (); | |
1460 | #endif | |
1461 | ||
d0d6b7c5 JB |
1462 | /* I wonder if close (open (pty_name, ...)) would work? */ |
1463 | if (xforkin >= 0) | |
1464 | close (xforkin); | |
1465 | xforkout = xforkin = open (pty_name, O_RDWR, 0); | |
1466 | ||
4aa54ba8 RS |
1467 | if (xforkin < 0) |
1468 | { | |
1469 | write (1, "Couldn't open the pty terminal ", 31); | |
1470 | write (1, pty_name, strlen (pty_name)); | |
1471 | write (1, "\n", 1); | |
1472 | _exit (1); | |
1473 | } | |
1474 | ||
99e3d726 RS |
1475 | #ifdef SET_CHILD_PTY_PGRP |
1476 | ioctl (xforkin, TIOCSPGRP, &pgrp); | |
1477 | ioctl (xforkout, TIOCSPGRP, &pgrp); | |
1478 | #endif | |
d0d6b7c5 | 1479 | } |
99153b9e | 1480 | #endif /* not UNIPLUS and not RTU and not DONT_REOPEN_PTY */ |
e9bf058b | 1481 | |
d0d6b7c5 | 1482 | #ifdef SETUP_SLAVE_PTY |
13a72104 RS |
1483 | if (pty_flag) |
1484 | { | |
1485 | SETUP_SLAVE_PTY; | |
1486 | } | |
d0d6b7c5 JB |
1487 | #endif /* SETUP_SLAVE_PTY */ |
1488 | #ifdef AIX | |
1489 | /* On AIX, we've disabled SIGHUP above once we start a child on a pty. | |
1490 | Now reenable it in the child, so it will die when we want it to. */ | |
1491 | if (pty_flag) | |
1492 | signal (SIGHUP, SIG_DFL); | |
1493 | #endif | |
1494 | #endif /* HAVE_PTYS */ | |
1495 | ||
0dc70c33 KH |
1496 | signal (SIGINT, SIG_DFL); |
1497 | signal (SIGQUIT, SIG_DFL); | |
1498 | ||
1499 | /* Stop blocking signals in the child. */ | |
1500 | #ifdef POSIX_SIGNALS | |
1501 | sigprocmask (SIG_SETMASK, &procmask, 0); | |
1502 | #else /* !POSIX_SIGNALS */ | |
d0d6b7c5 JB |
1503 | #ifdef SIGCHLD |
1504 | #ifdef BSD4_1 | |
1505 | sigrelse (SIGCHLD); | |
1506 | #else /* not BSD4_1 */ | |
1507 | #if defined (BSD) || defined (UNIPLUS) || defined (HPUX) | |
1508 | sigsetmask (SIGEMPTYMASK); | |
1509 | #else /* ordinary USG */ | |
63528b78 | 1510 | #if 0 |
d0d6b7c5 | 1511 | signal (SIGCHLD, sigchld); |
63528b78 | 1512 | #endif |
d0d6b7c5 JB |
1513 | #endif /* ordinary USG */ |
1514 | #endif /* not BSD4_1 */ | |
1515 | #endif /* SIGCHLD */ | |
0dc70c33 | 1516 | #endif /* !POSIX_SIGNALS */ |
5e7e1da2 | 1517 | |
ab01d0a8 RS |
1518 | if (pty_flag) |
1519 | child_setup_tty (xforkout); | |
e98d950b RS |
1520 | #ifdef WINDOWSNT |
1521 | pid = child_setup (xforkin, xforkout, xforkout, | |
1522 | new_argv, 1, current_dir); | |
1523 | #else /* not WINDOWSNT */ | |
d0d6b7c5 | 1524 | child_setup (xforkin, xforkout, xforkout, |
e065a56e | 1525 | new_argv, 1, current_dir); |
e98d950b | 1526 | #endif /* not WINDOWSNT */ |
d0d6b7c5 JB |
1527 | } |
1528 | environ = save_environ; | |
1529 | } | |
1530 | ||
4a127b3b | 1531 | /* This runs in the Emacs process. */ |
d0d6b7c5 | 1532 | if (pid < 0) |
6311cf58 RS |
1533 | { |
1534 | if (forkin >= 0) | |
1535 | close (forkin); | |
1536 | if (forkin != forkout && forkout >= 0) | |
1537 | close (forkout); | |
6311cf58 | 1538 | } |
4a127b3b KH |
1539 | else |
1540 | { | |
1541 | /* vfork succeeded. */ | |
1542 | XSETFASTINT (XPROCESS (process)->pid, pid); | |
d0d6b7c5 | 1543 | |
e98d950b | 1544 | #ifdef WINDOWSNT |
4a127b3b | 1545 | register_child (pid, inchannel); |
e98d950b RS |
1546 | #endif /* WINDOWSNT */ |
1547 | ||
4a127b3b KH |
1548 | /* If the subfork execv fails, and it exits, |
1549 | this close hangs. I don't know why. | |
1550 | So have an interrupt jar it loose. */ | |
1551 | stop_polling (); | |
1552 | signal (SIGALRM, create_process_1); | |
1553 | alarm (1); | |
1554 | XPROCESS (process)->subtty = Qnil; | |
1555 | if (forkin >= 0) | |
1556 | close (forkin); | |
1557 | alarm (0); | |
1558 | start_polling (); | |
1559 | if (forkin != forkout && forkout >= 0) | |
1560 | close (forkout); | |
d0d6b7c5 | 1561 | |
875e6b94 | 1562 | #ifdef HAVE_PTYS |
4a127b3b KH |
1563 | if (pty_flag) |
1564 | XPROCESS (process)->tty_name = build_string (pty_name); | |
1565 | else | |
875e6b94 | 1566 | #endif |
4a127b3b KH |
1567 | XPROCESS (process)->tty_name = Qnil; |
1568 | } | |
3b9a3dfa | 1569 | |
4a127b3b KH |
1570 | /* Restore the signal state whether vfork succeeded or not. |
1571 | (We will signal an error, below, if it failed.) */ | |
0dc70c33 KH |
1572 | #ifdef POSIX_SIGNALS |
1573 | #ifdef HAVE_VFORK | |
1574 | /* Restore the parent's signal handlers. */ | |
1575 | sigaction (SIGINT, &sigint_action, 0); | |
1576 | sigaction (SIGQUIT, &sigquit_action, 0); | |
1577 | #ifdef AIX | |
1578 | sigaction (SIGHUP, &sighup_action, 0); | |
1579 | #endif | |
1580 | #endif /* HAVE_VFORK */ | |
1581 | /* Stop blocking signals in the parent. */ | |
1582 | sigprocmask (SIG_SETMASK, &procmask, 0); | |
1583 | #else /* !POSIX_SIGNALS */ | |
d0d6b7c5 JB |
1584 | #ifdef SIGCHLD |
1585 | #ifdef BSD4_1 | |
1586 | sigrelse (SIGCHLD); | |
1587 | #else /* not BSD4_1 */ | |
1588 | #if defined (BSD) || defined (UNIPLUS) || defined (HPUX) | |
1589 | sigsetmask (SIGEMPTYMASK); | |
1590 | #else /* ordinary USG */ | |
1591 | #if 0 | |
1592 | signal (SIGCHLD, sigchld); | |
1593 | /* Now really handle any of these signals | |
1594 | that came in during this function. */ | |
1595 | if (sigchld_deferred) | |
1596 | kill (getpid (), SIGCHLD); | |
1597 | #endif | |
1598 | #endif /* ordinary USG */ | |
1599 | #endif /* not BSD4_1 */ | |
1600 | #endif /* SIGCHLD */ | |
0dc70c33 | 1601 | #endif /* !POSIX_SIGNALS */ |
4a127b3b KH |
1602 | |
1603 | /* Now generate the error if vfork failed. */ | |
1604 | if (pid < 0) | |
1605 | report_file_error ("Doing vfork", Qnil); | |
d0d6b7c5 JB |
1606 | } |
1607 | #endif /* not VMS */ | |
1608 | ||
1609 | #ifdef HAVE_SOCKETS | |
1610 | ||
1611 | /* open a TCP network connection to a given HOST/SERVICE. Treated | |
1612 | exactly like a normal process when reading and writing. Only | |
1613 | differences are in status display and process deletion. A network | |
1614 | connection has no PID; you cannot signal it. All you can do is | |
1615 | deactivate and close it via delete-process */ | |
1616 | ||
1617 | DEFUN ("open-network-stream", Fopen_network_stream, Sopen_network_stream, | |
1618 | 4, 4, 0, | |
1619 | "Open a TCP connection for a service to a host.\n\ | |
1620 | Returns a subprocess-object to represent the connection.\n\ | |
1621 | Input and output work as for subprocesses; `delete-process' closes it.\n\ | |
1622 | Args are NAME BUFFER HOST SERVICE.\n\ | |
1623 | NAME is name for process. It is modified if necessary to make it unique.\n\ | |
1624 | BUFFER is the buffer (or buffer-name) to associate with the process.\n\ | |
1625 | Process output goes at end of that buffer, unless you specify\n\ | |
1626 | an output stream or filter function to handle the output.\n\ | |
1627 | BUFFER may be also nil, meaning that this process is not associated\n\ | |
1628 | with any buffer\n\ | |
1629 | Third arg is name of the host to connect to, or its IP address.\n\ | |
1630 | Fourth arg SERVICE is name of the service desired, or an integer\n\ | |
1631 | specifying a port number to connect to.") | |
1632 | (name, buffer, host, service) | |
1633 | Lisp_Object name, buffer, host, service; | |
1634 | { | |
1635 | Lisp_Object proc; | |
1636 | register int i; | |
1637 | struct sockaddr_in address; | |
1638 | struct servent *svc_info; | |
1639 | struct hostent *host_info_ptr, host_info; | |
1640 | char *(addr_list[2]); | |
79967d5e | 1641 | IN_ADDR numeric_addr; |
d0d6b7c5 JB |
1642 | int s, outch, inch; |
1643 | char errstring[80]; | |
1644 | int port; | |
1645 | struct hostent host_info_fixed; | |
1646 | struct gcpro gcpro1, gcpro2, gcpro3, gcpro4; | |
e333e864 | 1647 | int retry = 0; |
44ade2e9 | 1648 | int count = specpdl_ptr - specpdl; |
d0d6b7c5 | 1649 | |
bff3ed0a RS |
1650 | #ifdef WINDOWSNT |
1651 | /* Ensure socket support is loaded if available. */ | |
1652 | init_winsock (TRUE); | |
1653 | #endif | |
1654 | ||
d0d6b7c5 JB |
1655 | GCPRO4 (name, buffer, host, service); |
1656 | CHECK_STRING (name, 0); | |
1657 | CHECK_STRING (host, 0); | |
bcd69aea | 1658 | if (INTEGERP (service)) |
d0d6b7c5 JB |
1659 | port = htons ((unsigned short) XINT (service)); |
1660 | else | |
1661 | { | |
1662 | CHECK_STRING (service, 0); | |
1663 | svc_info = getservbyname (XSTRING (service)->data, "tcp"); | |
1664 | if (svc_info == 0) | |
1665 | error ("Unknown service \"%s\"", XSTRING (service)->data); | |
1666 | port = svc_info->s_port; | |
1667 | } | |
1668 | ||
798b64bb KH |
1669 | /* Slow down polling to every ten seconds. |
1670 | Some kernels have a bug which causes retrying connect to fail | |
1671 | after a connect. Polling can interfere with gethostbyname too. */ | |
1672 | #ifdef POLL_FOR_INPUT | |
1673 | bind_polling_period (10); | |
1674 | #endif | |
1675 | ||
1d2c16fa | 1676 | #ifndef TERM |
616da37c RS |
1677 | while (1) |
1678 | { | |
5f0929a7 RS |
1679 | #ifdef TRY_AGAIN |
1680 | h_errno = 0; | |
1681 | #endif | |
5d6c2aa3 RS |
1682 | immediate_quit = 1; |
1683 | QUIT; | |
616da37c | 1684 | host_info_ptr = gethostbyname (XSTRING (host)->data); |
5d6c2aa3 | 1685 | immediate_quit = 0; |
616da37c RS |
1686 | #ifdef TRY_AGAIN |
1687 | if (! (host_info_ptr == 0 && h_errno == TRY_AGAIN)) | |
1688 | #endif | |
1689 | break; | |
1690 | Fsleep_for (make_number (1), Qnil); | |
1691 | } | |
d0d6b7c5 JB |
1692 | if (host_info_ptr == 0) |
1693 | /* Attempt to interpret host as numeric inet address */ | |
1694 | { | |
393a9679 | 1695 | numeric_addr = inet_addr ((char *) XSTRING (host)->data); |
79967d5e | 1696 | if (NUMERIC_ADDR_ERROR) |
d0d6b7c5 JB |
1697 | error ("Unknown host \"%s\"", XSTRING (host)->data); |
1698 | ||
1699 | host_info_ptr = &host_info; | |
1700 | host_info.h_name = 0; | |
1701 | host_info.h_aliases = 0; | |
1702 | host_info.h_addrtype = AF_INET; | |
39a21be6 JB |
1703 | #ifdef h_addr |
1704 | /* Older machines have only one address slot called h_addr. | |
1705 | Newer machines have h_addr_list, but #define h_addr to | |
1706 | be its first element. */ | |
1707 | host_info.h_addr_list = &(addr_list[0]); | |
1708 | #endif | |
1709 | host_info.h_addr = (char*)(&numeric_addr); | |
d0d6b7c5 | 1710 | addr_list[1] = 0; |
8777fbe2 RS |
1711 | /* numeric_addr isn't null-terminated; it has fixed length. */ |
1712 | host_info.h_length = sizeof (numeric_addr); | |
d0d6b7c5 JB |
1713 | } |
1714 | ||
1715 | bzero (&address, sizeof address); | |
1716 | bcopy (host_info_ptr->h_addr, (char *) &address.sin_addr, | |
1717 | host_info_ptr->h_length); | |
1718 | address.sin_family = host_info_ptr->h_addrtype; | |
1719 | address.sin_port = port; | |
1720 | ||
1721 | s = socket (host_info_ptr->h_addrtype, SOCK_STREAM, 0); | |
1722 | if (s < 0) | |
1723 | report_file_error ("error creating socket", Fcons (name, Qnil)); | |
1724 | ||
457a9bee RS |
1725 | /* Kernel bugs (on Ultrix at least) cause lossage (not just EINTR) |
1726 | when connect is interrupted. So let's not let it get interrupted. | |
1727 | Note we do not turn off polling, because polling is only used | |
1728 | when not interrupt_input, and thus not normally used on the systems | |
1729 | which have this bug. On systems which use polling, there's no way | |
1730 | to quit if polling is turned off. */ | |
1731 | if (interrupt_input) | |
1732 | unrequest_sigio (); | |
1733 | ||
d0d6b7c5 | 1734 | loop: |
0f2ee0c1 RS |
1735 | |
1736 | immediate_quit = 1; | |
1737 | QUIT; | |
1738 | ||
e333e864 RS |
1739 | if (connect (s, (struct sockaddr *) &address, sizeof address) == -1 |
1740 | && errno != EISCONN) | |
d0d6b7c5 JB |
1741 | { |
1742 | int xerrno = errno; | |
e333e864 | 1743 | |
0f2ee0c1 RS |
1744 | immediate_quit = 0; |
1745 | ||
d0d6b7c5 JB |
1746 | if (errno == EINTR) |
1747 | goto loop; | |
e333e864 RS |
1748 | if (errno == EADDRINUSE && retry < 20) |
1749 | { | |
4590788a RS |
1750 | /* A delay here is needed on some FreeBSD systems, |
1751 | and it is harmless, since this retrying takes time anyway | |
1752 | and should be infrequent. */ | |
1753 | Fsleep_for (make_number (1), Qnil); | |
e333e864 RS |
1754 | retry++; |
1755 | goto loop; | |
1756 | } | |
1757 | ||
d0d6b7c5 | 1758 | close (s); |
457a9bee RS |
1759 | |
1760 | if (interrupt_input) | |
1761 | request_sigio (); | |
1762 | ||
d0d6b7c5 JB |
1763 | errno = xerrno; |
1764 | report_file_error ("connection failed", | |
1765 | Fcons (host, Fcons (name, Qnil))); | |
1766 | } | |
457a9bee | 1767 | |
0f2ee0c1 RS |
1768 | immediate_quit = 0; |
1769 | ||
44ade2e9 RS |
1770 | #ifdef POLL_FOR_INPUT |
1771 | unbind_to (count, Qnil); | |
1772 | #endif | |
1773 | ||
457a9bee RS |
1774 | if (interrupt_input) |
1775 | request_sigio (); | |
1776 | ||
1d2c16fa RS |
1777 | #else /* TERM */ |
1778 | s = connect_server (0); | |
1779 | if (s < 0) | |
1780 | report_file_error ("error creating socket", Fcons (name, Qnil)); | |
1781 | send_command (s, C_PORT, 0, "%s:%d", XSTRING (host)->data, ntohs (port)); | |
1782 | send_command (s, C_DUMB, 1, 0); | |
1783 | #endif /* TERM */ | |
d0d6b7c5 JB |
1784 | |
1785 | inch = s; | |
1786 | outch = dup (s); | |
1787 | if (outch < 0) | |
1788 | report_file_error ("error duplicating socket", Fcons (name, Qnil)); | |
1789 | ||
1790 | if (!NILP (buffer)) | |
1791 | buffer = Fget_buffer_create (buffer); | |
1792 | proc = make_process (name); | |
1793 | ||
1794 | chan_process[inch] = proc; | |
1795 | ||
1796 | #ifdef O_NONBLOCK | |
1797 | fcntl (inch, F_SETFL, O_NONBLOCK); | |
1798 | #else | |
1799 | #ifdef O_NDELAY | |
1800 | fcntl (inch, F_SETFL, O_NDELAY); | |
1801 | #endif | |
1802 | #endif | |
1803 | ||
de282a05 | 1804 | XPROCESS (proc)->childp = Fcons (host, Fcons (service, Qnil)); |
d0d6b7c5 JB |
1805 | XPROCESS (proc)->command_channel_p = Qnil; |
1806 | XPROCESS (proc)->buffer = buffer; | |
1807 | XPROCESS (proc)->sentinel = Qnil; | |
1808 | XPROCESS (proc)->filter = Qnil; | |
1809 | XPROCESS (proc)->command = Qnil; | |
1810 | XPROCESS (proc)->pid = Qnil; | |
7795ff9b | 1811 | XSETINT (XPROCESS (proc)->infd, inch); |
1d056e64 | 1812 | XSETINT (XPROCESS (proc)->outfd, outch); |
d0d6b7c5 JB |
1813 | XPROCESS (proc)->status = Qrun; |
1814 | FD_SET (inch, &input_wait_mask); | |
a69281ff | 1815 | FD_SET (inch, &non_keyboard_wait_mask); |
7d0e672e RS |
1816 | if (inch > max_process_desc) |
1817 | max_process_desc = inch; | |
d0d6b7c5 JB |
1818 | |
1819 | UNGCPRO; | |
1820 | return proc; | |
1821 | } | |
1822 | #endif /* HAVE_SOCKETS */ | |
1823 | ||
1824 | deactivate_process (proc) | |
1825 | Lisp_Object proc; | |
1826 | { | |
1827 | register int inchannel, outchannel; | |
1828 | register struct Lisp_Process *p = XPROCESS (proc); | |
1829 | ||
a9f2c884 RS |
1830 | inchannel = XINT (p->infd); |
1831 | outchannel = XINT (p->outfd); | |
d0d6b7c5 | 1832 | |
a9f2c884 | 1833 | if (inchannel >= 0) |
d0d6b7c5 JB |
1834 | { |
1835 | /* Beware SIGCHLD hereabouts. */ | |
1836 | flush_pending_output (inchannel); | |
1837 | #ifdef VMS | |
1838 | { | |
1839 | VMS_PROC_STUFF *get_vms_process_pointer (), *vs; | |
1840 | sys$dassgn (outchannel); | |
c6c6865d | 1841 | vs = get_vms_process_pointer (p->pid); |
d0d6b7c5 JB |
1842 | if (vs) |
1843 | give_back_vms_process_stuff (vs); | |
1844 | } | |
1845 | #else | |
1846 | close (inchannel); | |
a9f2c884 | 1847 | if (outchannel >= 0 && outchannel != inchannel) |
d0d6b7c5 JB |
1848 | close (outchannel); |
1849 | #endif | |
1850 | ||
1d056e64 KH |
1851 | XSETINT (p->infd, -1); |
1852 | XSETINT (p->outfd, -1); | |
d0d6b7c5 JB |
1853 | chan_process[inchannel] = Qnil; |
1854 | FD_CLR (inchannel, &input_wait_mask); | |
a69281ff | 1855 | FD_CLR (inchannel, &non_keyboard_wait_mask); |
7d0e672e RS |
1856 | if (inchannel == max_process_desc) |
1857 | { | |
1858 | int i; | |
1859 | /* We just closed the highest-numbered process input descriptor, | |
1860 | so recompute the highest-numbered one now. */ | |
1861 | max_process_desc = 0; | |
1862 | for (i = 0; i < MAXDESC; i++) | |
1863 | if (!NILP (chan_process[i])) | |
1864 | max_process_desc = i; | |
1865 | } | |
d0d6b7c5 JB |
1866 | } |
1867 | } | |
1868 | ||
1869 | /* Close all descriptors currently in use for communication | |
1870 | with subprocess. This is used in a newly-forked subprocess | |
1871 | to get rid of irrelevant descriptors. */ | |
1872 | ||
1873 | close_process_descs () | |
1874 | { | |
e98d950b | 1875 | #ifndef WINDOWSNT |
d0d6b7c5 JB |
1876 | int i; |
1877 | for (i = 0; i < MAXDESC; i++) | |
1878 | { | |
1879 | Lisp_Object process; | |
1880 | process = chan_process[i]; | |
1881 | if (!NILP (process)) | |
1882 | { | |
a9f2c884 RS |
1883 | int in = XINT (XPROCESS (process)->infd); |
1884 | int out = XINT (XPROCESS (process)->outfd); | |
1885 | if (in >= 0) | |
d0d6b7c5 | 1886 | close (in); |
a9f2c884 | 1887 | if (out >= 0 && in != out) |
d0d6b7c5 JB |
1888 | close (out); |
1889 | } | |
1890 | } | |
e98d950b | 1891 | #endif |
d0d6b7c5 JB |
1892 | } |
1893 | \f | |
1894 | DEFUN ("accept-process-output", Faccept_process_output, Saccept_process_output, | |
1895 | 0, 3, 0, | |
1896 | "Allow any pending output from subprocesses to be read by Emacs.\n\ | |
1897 | It is read into the process' buffers or given to their filter functions.\n\ | |
1898 | Non-nil arg PROCESS means do not return until some output has been received\n\ | |
1899 | from PROCESS.\n\ | |
1900 | Non-nil second arg TIMEOUT and third arg TIMEOUT-MSECS are number of\n\ | |
1901 | seconds and microseconds to wait; return after that much time whether\n\ | |
1902 | or not there is input.\n\ | |
1903 | Return non-nil iff we received any output before the timeout expired.") | |
4ee3e309 EN |
1904 | (process, timeout, timeout_msecs) |
1905 | register Lisp_Object process, timeout, timeout_msecs; | |
d0d6b7c5 JB |
1906 | { |
1907 | int seconds; | |
1908 | int useconds; | |
1909 | ||
1910 | if (! NILP (timeout_msecs)) | |
1911 | { | |
1912 | CHECK_NUMBER (timeout_msecs, 2); | |
1913 | useconds = XINT (timeout_msecs); | |
bcd69aea | 1914 | if (!INTEGERP (timeout)) |
1d056e64 | 1915 | XSETINT (timeout, 0); |
d0d6b7c5 JB |
1916 | |
1917 | { | |
1918 | int carry = useconds / 1000000; | |
1919 | ||
1920 | XSETINT (timeout, XINT (timeout) + carry); | |
1921 | useconds -= carry * 1000000; | |
1922 | ||
1923 | /* I think this clause is necessary because C doesn't | |
1924 | guarantee a particular rounding direction for negative | |
1925 | integers. */ | |
1926 | if (useconds < 0) | |
1927 | { | |
1928 | XSETINT (timeout, XINT (timeout) - 1); | |
1929 | useconds += 1000000; | |
1930 | } | |
1931 | } | |
1932 | } | |
de946e5a RS |
1933 | else |
1934 | useconds = 0; | |
d0d6b7c5 JB |
1935 | |
1936 | if (! NILP (timeout)) | |
1937 | { | |
1938 | CHECK_NUMBER (timeout, 1); | |
1939 | seconds = XINT (timeout); | |
ada9a4fd | 1940 | if (seconds < 0 || (seconds == 0 && useconds == 0)) |
d0d6b7c5 JB |
1941 | seconds = -1; |
1942 | } | |
1943 | else | |
1944 | { | |
4ee3e309 | 1945 | if (NILP (process)) |
d0d6b7c5 JB |
1946 | seconds = -1; |
1947 | else | |
1948 | seconds = 0; | |
1949 | } | |
1950 | ||
4ee3e309 EN |
1951 | if (NILP (process)) |
1952 | XSETFASTINT (process, 0); | |
f76475ad | 1953 | |
d0d6b7c5 | 1954 | return |
4ee3e309 | 1955 | (wait_reading_process_input (seconds, useconds, process, 0) |
d0d6b7c5 JB |
1956 | ? Qt : Qnil); |
1957 | } | |
1958 | ||
1959 | /* This variable is different from waiting_for_input in keyboard.c. | |
1960 | It is used to communicate to a lisp process-filter/sentinel (via the | |
1961 | function Fwaiting_for_user_input_p below) whether emacs was waiting | |
1962 | for user-input when that process-filter was called. | |
1963 | waiting_for_input cannot be used as that is by definition 0 when | |
d430ee71 RS |
1964 | lisp code is being evalled. |
1965 | This is also used in record_asynch_buffer_change. | |
1966 | For that purpose, this must be 0 | |
1967 | when not inside wait_reading_process_input. */ | |
d0d6b7c5 JB |
1968 | static int waiting_for_user_input_p; |
1969 | ||
c573ae8e RS |
1970 | /* This is here so breakpoints can be put on it. */ |
1971 | static | |
1972 | wait_reading_process_input_1 () | |
1973 | { | |
1974 | } | |
1975 | ||
d0d6b7c5 JB |
1976 | /* Read and dispose of subprocess output while waiting for timeout to |
1977 | elapse and/or keyboard input to be available. | |
1978 | ||
de6fd4b9 | 1979 | TIME_LIMIT is: |
d0d6b7c5 JB |
1980 | timeout in seconds, or |
1981 | zero for no limit, or | |
1982 | -1 means gobble data immediately available but don't wait for any. | |
1983 | ||
de6fd4b9 RS |
1984 | MICROSECS is: |
1985 | an additional duration to wait, measured in microseconds. | |
1986 | If this is nonzero and time_limit is 0, then the timeout | |
1987 | consists of MICROSECS only. | |
6e4f3667 | 1988 | |
de6fd4b9 | 1989 | READ_KBD is a lisp value: |
d0d6b7c5 JB |
1990 | 0 to ignore keyboard input, or |
1991 | 1 to return when input is available, or | |
84aa3ace | 1992 | -1 meaning caller will actually read the input, so don't throw to |
d0d6b7c5 | 1993 | the quit handler, or |
e6194ffc | 1994 | a cons cell, meaning wait until its car is non-nil |
de6fd4b9 | 1995 | (and gobble terminal input into the buffer if any arrives), or |
f76475ad JB |
1996 | a process object, meaning wait until something arrives from that |
1997 | process. The return value is true iff we read some input from | |
1998 | that process. | |
d0d6b7c5 | 1999 | |
de6fd4b9 | 2000 | DO_DISPLAY != 0 means redisplay should be done to show subprocess |
d0d6b7c5 JB |
2001 | output that arrives. |
2002 | ||
de6fd4b9 | 2003 | If READ_KBD is a pointer to a struct Lisp_Process, then the |
d0d6b7c5 JB |
2004 | function returns true iff we received input from that process |
2005 | before the timeout elapsed. | |
eb8c3be9 | 2006 | Otherwise, return true iff we received input from any process. */ |
d0d6b7c5 JB |
2007 | |
2008 | wait_reading_process_input (time_limit, microsecs, read_kbd, do_display) | |
f76475ad JB |
2009 | int time_limit, microsecs; |
2010 | Lisp_Object read_kbd; | |
2011 | int do_display; | |
d0d6b7c5 JB |
2012 | { |
2013 | register int channel, nfds, m; | |
2014 | static SELECT_TYPE Available; | |
2015 | int xerrno; | |
2016 | Lisp_Object proc; | |
2017 | EMACS_TIME timeout, end_time, garbage; | |
2018 | SELECT_TYPE Atemp; | |
a9f2c884 | 2019 | int wait_channel = -1; |
d0d6b7c5 JB |
2020 | struct Lisp_Process *wait_proc = 0; |
2021 | int got_some_input = 0; | |
84aa3ace | 2022 | Lisp_Object *wait_for_cell = 0; |
d0d6b7c5 JB |
2023 | |
2024 | FD_ZERO (&Available); | |
2025 | ||
f76475ad JB |
2026 | /* If read_kbd is a process to watch, set wait_proc and wait_channel |
2027 | accordingly. */ | |
bcd69aea | 2028 | if (PROCESSP (read_kbd)) |
d0d6b7c5 | 2029 | { |
f76475ad | 2030 | wait_proc = XPROCESS (read_kbd); |
a9f2c884 | 2031 | wait_channel = XINT (wait_proc->infd); |
22719df2 | 2032 | XSETFASTINT (read_kbd, 0); |
d0d6b7c5 JB |
2033 | } |
2034 | ||
84aa3ace | 2035 | /* If waiting for non-nil in a cell, record where. */ |
bcd69aea | 2036 | if (CONSP (read_kbd)) |
84aa3ace RS |
2037 | { |
2038 | wait_for_cell = &XCONS (read_kbd)->car; | |
22719df2 | 2039 | XSETFASTINT (read_kbd, 0); |
84aa3ace RS |
2040 | } |
2041 | ||
f76475ad | 2042 | waiting_for_user_input_p = XINT (read_kbd); |
d0d6b7c5 JB |
2043 | |
2044 | /* Since we may need to wait several times, | |
2045 | compute the absolute time to return at. */ | |
2046 | if (time_limit || microsecs) | |
2047 | { | |
2048 | EMACS_GET_TIME (end_time); | |
2049 | EMACS_SET_SECS_USECS (timeout, time_limit, microsecs); | |
2050 | EMACS_ADD_TIME (end_time, end_time, timeout); | |
2051 | } | |
e07d5449 KH |
2052 | #ifdef hpux |
2053 | /* AlainF 5-Jul-1996 | |
2054 | HP-UX 10.10 seem to have problems with signals coming in | |
2055 | Causes "poll: interrupted system call" messages when Emacs is run | |
2056 | in an X window | |
2057 | Turn off periodic alarms (in case they are in use) */ | |
2058 | stop_polling (); | |
2059 | #endif | |
d0d6b7c5 | 2060 | |
d0d6b7c5 JB |
2061 | while (1) |
2062 | { | |
c0239a0b RS |
2063 | int timeout_reduced_for_timers = 0; |
2064 | ||
d0d6b7c5 JB |
2065 | /* If calling from keyboard input, do not quit |
2066 | since we want to return C-g as an input character. | |
2067 | Otherwise, do pending quit if requested. */ | |
f76475ad | 2068 | if (XINT (read_kbd) >= 0) |
d0d6b7c5 JB |
2069 | QUIT; |
2070 | ||
889255b4 RS |
2071 | /* Exit now if the cell we're waiting for became non-nil. */ |
2072 | if (wait_for_cell && ! NILP (*wait_for_cell)) | |
2073 | break; | |
2074 | ||
d0d6b7c5 JB |
2075 | /* Compute time from now till when time limit is up */ |
2076 | /* Exit if already run out */ | |
2077 | if (time_limit == -1) | |
2078 | { | |
2079 | /* -1 specified for timeout means | |
2080 | gobble output available now | |
2081 | but don't wait at all. */ | |
2082 | ||
2083 | EMACS_SET_SECS_USECS (timeout, 0, 0); | |
2084 | } | |
2085 | else if (time_limit || microsecs) | |
2086 | { | |
2087 | EMACS_GET_TIME (timeout); | |
2088 | EMACS_SUB_TIME (timeout, end_time, timeout); | |
2089 | if (EMACS_TIME_NEG_P (timeout)) | |
2090 | break; | |
2091 | } | |
2092 | else | |
2093 | { | |
2094 | EMACS_SET_SECS_USECS (timeout, 100000, 0); | |
2095 | } | |
2096 | ||
f854a00b RS |
2097 | /* Normally we run timers here. |
2098 | But not if wait_for_cell; in those cases, | |
2099 | the wait is supposed to be short, | |
2100 | and those callers cannot handle running arbitrary Lisp code here. */ | |
2101 | if (! wait_for_cell) | |
fb4c3627 | 2102 | { |
c0239a0b | 2103 | EMACS_TIME timer_delay; |
c573ae8e RS |
2104 | int old_timers_run; |
2105 | ||
2106 | retry: | |
2107 | old_timers_run = timers_run; | |
c0239a0b | 2108 | timer_delay = timer_check (1); |
5de50bfb | 2109 | if (timers_run != old_timers_run && do_display) |
c573ae8e RS |
2110 | { |
2111 | redisplay_preserve_echo_area (); | |
2112 | /* We must retry, since a timer may have requeued itself | |
2113 | and that could alter the time_delay. */ | |
2114 | goto retry; | |
2115 | } | |
2116 | ||
c0239a0b | 2117 | if (! EMACS_TIME_NEG_P (timer_delay) && time_limit != -1) |
fb4c3627 RS |
2118 | { |
2119 | EMACS_TIME difference; | |
2120 | EMACS_SUB_TIME (difference, timer_delay, timeout); | |
2121 | if (EMACS_TIME_NEG_P (difference)) | |
c0239a0b RS |
2122 | { |
2123 | timeout = timer_delay; | |
2124 | timeout_reduced_for_timers = 1; | |
2125 | } | |
fb4c3627 | 2126 | } |
4abca5e7 RS |
2127 | /* If time_limit is -1, we are not going to wait at all. */ |
2128 | else if (time_limit != -1) | |
c573ae8e RS |
2129 | { |
2130 | /* This is so a breakpoint can be put here. */ | |
2131 | wait_reading_process_input_1 (); | |
2132 | } | |
fb4c3627 RS |
2133 | } |
2134 | ||
90ab1a81 JB |
2135 | /* Cause C-g and alarm signals to take immediate action, |
2136 | and cause input available signals to zero out timeout. | |
2137 | ||
2138 | It is important that we do this before checking for process | |
2139 | activity. If we get a SIGCHLD after the explicit checks for | |
2140 | process activity, timeout is the only way we will know. */ | |
2141 | if (XINT (read_kbd) < 0) | |
2142 | set_waiting_for_input (&timeout); | |
2143 | ||
6be429b1 JB |
2144 | /* If status of something has changed, and no input is |
2145 | available, notify the user of the change right away. After | |
2146 | this explicit check, we'll let the SIGCHLD handler zap | |
2147 | timeout to get our attention. */ | |
2148 | if (update_tick != process_tick && do_display) | |
2149 | { | |
2150 | Atemp = input_wait_mask; | |
2151 | EMACS_SET_SECS_USECS (timeout, 0, 0); | |
ecd1f654 KH |
2152 | if ((select (MAXDESC, &Atemp, (SELECT_TYPE *)0, (SELECT_TYPE *)0, |
2153 | &timeout) | |
2154 | <= 0)) | |
90ab1a81 JB |
2155 | { |
2156 | /* It's okay for us to do this and then continue with | |
a0e4d3f3 | 2157 | the loop, since timeout has already been zeroed out. */ |
90ab1a81 JB |
2158 | clear_waiting_for_input (); |
2159 | status_notify (); | |
2160 | } | |
6be429b1 JB |
2161 | } |
2162 | ||
2163 | /* Don't wait for output from a non-running process. */ | |
2164 | if (wait_proc != 0 && !NILP (wait_proc->raw_status_low)) | |
2165 | update_status (wait_proc); | |
2166 | if (wait_proc != 0 | |
2167 | && ! EQ (wait_proc->status, Qrun)) | |
9aa2a7f4 JB |
2168 | { |
2169 | clear_waiting_for_input (); | |
2170 | break; | |
2171 | } | |
6be429b1 | 2172 | |
d0d6b7c5 JB |
2173 | /* Wait till there is something to do */ |
2174 | ||
5e7e1da2 | 2175 | if (! XINT (read_kbd) && wait_for_cell == 0) |
a69281ff RS |
2176 | Available = non_keyboard_wait_mask; |
2177 | else | |
2178 | Available = input_wait_mask; | |
d0d6b7c5 | 2179 | |
ff11dfa1 | 2180 | /* If frame size has changed or the window is newly mapped, |
ffd56f97 JB |
2181 | redisplay now, before we start to wait. There is a race |
2182 | condition here; if a SIGIO arrives between now and the select | |
016899c0 JB |
2183 | and indicates that a frame is trashed, the select may block |
2184 | displaying a trashed screen. */ | |
5164ee8e | 2185 | if (frame_garbaged && do_display) |
7286affd RS |
2186 | { |
2187 | clear_waiting_for_input (); | |
2188 | redisplay_preserve_echo_area (); | |
2189 | if (XINT (read_kbd) < 0) | |
7efe788e | 2190 | set_waiting_for_input (&timeout); |
7286affd | 2191 | } |
ffd56f97 | 2192 | |
0a65b032 RS |
2193 | if (XINT (read_kbd) && detect_input_pending ()) |
2194 | { | |
2195 | nfds = 0; | |
2196 | FD_ZERO (&Available); | |
2197 | } | |
2198 | else | |
2199 | nfds = select (MAXDESC, &Available, (SELECT_TYPE *)0, (SELECT_TYPE *)0, | |
2200 | &timeout); | |
6720a7fb | 2201 | |
d0d6b7c5 JB |
2202 | xerrno = errno; |
2203 | ||
2204 | /* Make C-g and alarm signals set flags again */ | |
2205 | clear_waiting_for_input (); | |
2206 | ||
2207 | /* If we woke up due to SIGWINCH, actually change size now. */ | |
2208 | do_pending_window_change (); | |
2209 | ||
c0239a0b RS |
2210 | if (time_limit && nfds == 0 && ! timeout_reduced_for_timers) |
2211 | /* We wanted the full specified time, so return now. */ | |
d0d6b7c5 JB |
2212 | break; |
2213 | if (nfds < 0) | |
2214 | { | |
2215 | if (xerrno == EINTR) | |
2216 | FD_ZERO (&Available); | |
b0310da4 JB |
2217 | #ifdef ultrix |
2218 | /* Ultrix select seems to return ENOMEM when it is | |
2219 | interrupted. Treat it just like EINTR. Bleah. Note | |
2220 | that we want to test for the "ultrix" CPP symbol, not | |
2221 | "__ultrix__"; the latter is only defined under GCC, but | |
2222 | not by DEC's bundled CC. -JimB */ | |
8058415c JB |
2223 | else if (xerrno == ENOMEM) |
2224 | FD_ZERO (&Available); | |
2225 | #endif | |
d0d6b7c5 JB |
2226 | #ifdef ALLIANT |
2227 | /* This happens for no known reason on ALLIANT. | |
2228 | I am guessing that this is the right response. -- RMS. */ | |
2229 | else if (xerrno == EFAULT) | |
2230 | FD_ZERO (&Available); | |
2231 | #endif | |
2232 | else if (xerrno == EBADF) | |
2233 | { | |
2234 | #ifdef AIX | |
2235 | /* AIX doesn't handle PTY closure the same way BSD does. On AIX, | |
2236 | the child's closure of the pts gives the parent a SIGHUP, and | |
2237 | the ptc file descriptor is automatically closed, | |
2238 | yielding EBADF here or at select() call above. | |
2239 | So, SIGHUP is ignored (see def of PTY_TTY_NAME_SPRINTF | |
a0e4d3f3 | 2240 | in m/ibmrt-aix.h), and here we just ignore the select error. |
d0d6b7c5 | 2241 | Cleanup occurs c/o status_notify after SIGCLD. */ |
ffd56f97 | 2242 | FD_ZERO (&Available); /* Cannot depend on values returned */ |
d0d6b7c5 JB |
2243 | #else |
2244 | abort (); | |
2245 | #endif | |
2246 | } | |
2247 | else | |
6ed6233b | 2248 | error ("select error: %s", strerror (xerrno)); |
d0d6b7c5 | 2249 | } |
26ec91de | 2250 | #if defined(sun) && !defined(USG5_4) |
a69281ff | 2251 | else if (nfds > 0 && keyboard_bit_set (&Available) |
dd2281ae | 2252 | && interrupt_input) |
e0109153 JB |
2253 | /* System sometimes fails to deliver SIGIO. |
2254 | ||
2255 | David J. Mackenzie says that Emacs doesn't compile under | |
2256 | Solaris if this code is enabled, thus the USG5_4 in the CPP | |
2257 | conditional. "I haven't noticed any ill effects so far. | |
2258 | If you find a Solaris expert somewhere, they might know | |
2259 | better." */ | |
d0d6b7c5 JB |
2260 | kill (getpid (), SIGIO); |
2261 | #endif | |
2262 | ||
2263 | /* Check for keyboard input */ | |
2264 | /* If there is any, return immediately | |
2265 | to give it higher priority than subprocesses */ | |
2266 | ||
f854a00b | 2267 | if ((XINT (read_kbd) != 0) |
5d6c2aa3 | 2268 | && detect_input_pending_run_timers (do_display)) |
6ed6233b KH |
2269 | { |
2270 | swallow_events (do_display); | |
5d6c2aa3 | 2271 | if (detect_input_pending_run_timers (do_display)) |
6ed6233b KH |
2272 | break; |
2273 | } | |
2274 | ||
f854a00b RS |
2275 | /* If wait_for_cell. check for keyboard input |
2276 | but don't run any timers. | |
2277 | ??? (It seems wrong to me to check for keyboard | |
2278 | input at all when wait_for_cell, but the code | |
2279 | has been this way since July 1994. | |
2280 | Try changing this after version 19.31.) */ | |
2281 | if (wait_for_cell | |
2282 | && detect_input_pending ()) | |
2283 | { | |
2284 | swallow_events (do_display); | |
2285 | if (detect_input_pending ()) | |
2286 | break; | |
2287 | } | |
2288 | ||
84aa3ace RS |
2289 | /* Exit now if the cell we're waiting for became non-nil. */ |
2290 | if (wait_for_cell && ! NILP (*wait_for_cell)) | |
2291 | break; | |
2292 | ||
4746118a | 2293 | #ifdef SIGIO |
d0d6b7c5 JB |
2294 | /* If we think we have keyboard input waiting, but didn't get SIGIO |
2295 | go read it. This can happen with X on BSD after logging out. | |
2296 | In that case, there really is no input and no SIGIO, | |
2297 | but select says there is input. */ | |
2298 | ||
dd2281ae | 2299 | if (XINT (read_kbd) && interrupt_input |
a69281ff | 2300 | && (keyboard_bit_set (&Available))) |
e643c5be | 2301 | kill (getpid (), SIGIO); |
4746118a | 2302 | #endif |
d0d6b7c5 | 2303 | |
d0d6b7c5 JB |
2304 | if (! wait_proc) |
2305 | got_some_input |= nfds > 0; | |
2306 | ||
32676c08 JB |
2307 | /* If checking input just got us a size-change event from X, |
2308 | obey it now if we should. */ | |
97f3b3d6 | 2309 | if (XINT (read_kbd) || wait_for_cell) |
32676c08 JB |
2310 | do_pending_window_change (); |
2311 | ||
a9f2c884 RS |
2312 | /* Check for data from a process. */ |
2313 | /* Really FIRST_PROC_DESC should be 0 on Unix, | |
2314 | but this is safer in the short run. */ | |
a69281ff | 2315 | for (channel = 0; channel <= max_process_desc; channel++) |
d0d6b7c5 | 2316 | { |
a69281ff RS |
2317 | if (FD_ISSET (channel, &Available) |
2318 | && FD_ISSET (channel, &non_keyboard_wait_mask)) | |
d0d6b7c5 JB |
2319 | { |
2320 | int nread; | |
2321 | ||
2322 | /* If waiting for this channel, arrange to return as | |
2323 | soon as no more input to be processed. No more | |
2324 | waiting. */ | |
2325 | if (wait_channel == channel) | |
2326 | { | |
a9f2c884 | 2327 | wait_channel = -1; |
d0d6b7c5 JB |
2328 | time_limit = -1; |
2329 | got_some_input = 1; | |
2330 | } | |
2331 | proc = chan_process[channel]; | |
2332 | if (NILP (proc)) | |
2333 | continue; | |
2334 | ||
d0d6b7c5 JB |
2335 | /* Read data from the process, starting with our |
2336 | buffered-ahead character if we have one. */ | |
2337 | ||
2338 | nread = read_process_output (proc, channel); | |
2339 | if (nread > 0) | |
2340 | { | |
2341 | /* Since read_process_output can run a filter, | |
2342 | which can call accept-process-output, | |
2343 | don't try to read from any other processes | |
2344 | before doing the select again. */ | |
2345 | FD_ZERO (&Available); | |
2346 | ||
2347 | if (do_display) | |
2348 | redisplay_preserve_echo_area (); | |
2349 | } | |
2350 | #ifdef EWOULDBLOCK | |
2351 | else if (nread == -1 && errno == EWOULDBLOCK) | |
2352 | ; | |
0b75e9a4 | 2353 | #endif |
89d7280d RS |
2354 | /* ISC 4.1 defines both EWOULDBLOCK and O_NONBLOCK, |
2355 | and Emacs uses O_NONBLOCK, so what we get is EAGAIN. */ | |
d0d6b7c5 JB |
2356 | #ifdef O_NONBLOCK |
2357 | else if (nread == -1 && errno == EAGAIN) | |
2358 | ; | |
2359 | #else | |
2360 | #ifdef O_NDELAY | |
2361 | else if (nread == -1 && errno == EAGAIN) | |
2362 | ; | |
2363 | /* Note that we cannot distinguish between no input | |
2364 | available now and a closed pipe. | |
2365 | With luck, a closed pipe will be accompanied by | |
2366 | subprocess termination and SIGCHLD. */ | |
2367 | else if (nread == 0 && !NETCONN_P (proc)) | |
2368 | ; | |
ffd56f97 JB |
2369 | #endif /* O_NDELAY */ |
2370 | #endif /* O_NONBLOCK */ | |
d0d6b7c5 JB |
2371 | #ifdef HAVE_PTYS |
2372 | /* On some OSs with ptys, when the process on one end of | |
2373 | a pty exits, the other end gets an error reading with | |
2374 | errno = EIO instead of getting an EOF (0 bytes read). | |
2375 | Therefore, if we get an error reading and errno = | |
2376 | EIO, just continue, because the child process has | |
2377 | exited and should clean itself up soon (e.g. when we | |
2378 | get a SIGCHLD). */ | |
2379 | else if (nread == -1 && errno == EIO) | |
2380 | ; | |
ffd56f97 JB |
2381 | #endif /* HAVE_PTYS */ |
2382 | /* If we can detect process termination, don't consider the process | |
2383 | gone just because its pipe is closed. */ | |
d0d6b7c5 JB |
2384 | #ifdef SIGCHLD |
2385 | else if (nread == 0 && !NETCONN_P (proc)) | |
2386 | ; | |
2387 | #endif | |
2388 | else | |
2389 | { | |
2390 | /* Preserve status of processes already terminated. */ | |
2391 | XSETINT (XPROCESS (proc)->tick, ++process_tick); | |
2392 | deactivate_process (proc); | |
2393 | if (!NILP (XPROCESS (proc)->raw_status_low)) | |
2394 | update_status (XPROCESS (proc)); | |
2395 | if (EQ (XPROCESS (proc)->status, Qrun)) | |
2396 | XPROCESS (proc)->status | |
2397 | = Fcons (Qexit, Fcons (make_number (256), Qnil)); | |
2398 | } | |
2399 | } | |
ffd56f97 JB |
2400 | } /* end for each file descriptor */ |
2401 | } /* end while exit conditions not met */ | |
d0d6b7c5 | 2402 | |
d430ee71 RS |
2403 | waiting_for_user_input_p = 0; |
2404 | ||
ffd56f97 JB |
2405 | /* If calling from keyboard input, do not quit |
2406 | since we want to return C-g as an input character. | |
2407 | Otherwise, do pending quit if requested. */ | |
f76475ad | 2408 | if (XINT (read_kbd) >= 0) |
ffd56f97 JB |
2409 | { |
2410 | /* Prevent input_pending from remaining set if we quit. */ | |
2411 | clear_input_pending (); | |
2412 | QUIT; | |
2413 | } | |
e07d5449 KH |
2414 | #ifdef hpux |
2415 | /* AlainF 5-Jul-1996 | |
2416 | HP-UX 10.10 seems to have problems with signals coming in | |
2417 | Causes "poll: interrupted system call" messages when Emacs is run | |
2418 | in an X window | |
2419 | Turn periodic alarms back on */ | |
2420 | start_polling(); | |
2421 | #endif | |
2422 | ||
d0d6b7c5 JB |
2423 | return got_some_input; |
2424 | } | |
2425 | \f | |
3b9a3dfa RS |
2426 | /* Given a list (FUNCTION ARGS...), apply FUNCTION to the ARGS. */ |
2427 | ||
2428 | static Lisp_Object | |
2429 | read_process_output_call (fun_and_args) | |
2430 | Lisp_Object fun_and_args; | |
2431 | { | |
2432 | return apply1 (XCONS (fun_and_args)->car, XCONS (fun_and_args)->cdr); | |
2433 | } | |
2434 | ||
2435 | static Lisp_Object | |
2436 | read_process_output_error_handler (error) | |
2437 | Lisp_Object error; | |
2438 | { | |
2439 | cmd_error_internal (error, "error in process filter: "); | |
2440 | Vinhibit_quit = Qt; | |
2441 | update_echo_area (); | |
833ba342 | 2442 | Fsleep_for (make_number (2), Qnil); |
3b9a3dfa RS |
2443 | } |
2444 | ||
d0d6b7c5 JB |
2445 | /* Read pending output from the process channel, |
2446 | starting with our buffered-ahead character if we have one. | |
2447 | Yield number of characters read. | |
2448 | ||
2449 | This function reads at most 1024 characters. | |
2450 | If you want to read all available subprocess output, | |
2451 | you must call it repeatedly until it returns zero. */ | |
2452 | ||
2453 | read_process_output (proc, channel) | |
2454 | Lisp_Object proc; | |
2455 | register int channel; | |
2456 | { | |
2457 | register int nchars; | |
2458 | #ifdef VMS | |
2459 | char *chars; | |
2460 | #else | |
2461 | char chars[1024]; | |
2462 | #endif | |
2463 | register Lisp_Object outstream; | |
2464 | register struct buffer *old = current_buffer; | |
2465 | register struct Lisp_Process *p = XPROCESS (proc); | |
2466 | register int opoint; | |
2467 | ||
2468 | #ifdef VMS | |
2469 | VMS_PROC_STUFF *vs, *get_vms_process_pointer(); | |
2470 | ||
2471 | vs = get_vms_process_pointer (p->pid); | |
2472 | if (vs) | |
2473 | { | |
2474 | if (!vs->iosb[0]) | |
2475 | return(0); /* Really weird if it does this */ | |
2476 | if (!(vs->iosb[0] & 1)) | |
2477 | return -1; /* I/O error */ | |
2478 | } | |
2479 | else | |
2480 | error ("Could not get VMS process pointer"); | |
2481 | chars = vs->inputBuffer; | |
2482 | nchars = clean_vms_buffer (chars, vs->iosb[1]); | |
2483 | if (nchars <= 0) | |
2484 | { | |
2485 | start_vms_process_read (vs); /* Crank up the next read on the process */ | |
2486 | return 1; /* Nothing worth printing, say we got 1 */ | |
2487 | } | |
2488 | #else /* not VMS */ | |
2489 | ||
2490 | if (proc_buffered_char[channel] < 0) | |
7795ff9b | 2491 | nchars = read (channel, chars, sizeof (chars)); |
d0d6b7c5 JB |
2492 | else |
2493 | { | |
2494 | chars[0] = proc_buffered_char[channel]; | |
2495 | proc_buffered_char[channel] = -1; | |
7795ff9b | 2496 | nchars = read (channel, chars + 1, sizeof (chars) - 1); |
d0d6b7c5 JB |
2497 | if (nchars < 0) |
2498 | nchars = 1; | |
2499 | else | |
2500 | nchars = nchars + 1; | |
2501 | } | |
2502 | #endif /* not VMS */ | |
2503 | ||
2504 | if (nchars <= 0) return nchars; | |
2505 | ||
2506 | outstream = p->filter; | |
2507 | if (!NILP (outstream)) | |
2508 | { | |
2509 | /* We inhibit quit here instead of just catching it so that | |
2510 | hitting ^G when a filter happens to be running won't screw | |
2511 | it up. */ | |
2512 | int count = specpdl_ptr - specpdl; | |
30c78175 | 2513 | Lisp_Object odeactivate; |
dfc21838 | 2514 | Lisp_Object obuffer, okeymap; |
30c78175 | 2515 | |
dfc21838 RS |
2516 | /* No need to gcpro these, because all we do with them later |
2517 | is test them for EQness, and none of them should be a string. */ | |
30c78175 | 2518 | odeactivate = Vdeactivate_mark; |
dfc21838 RS |
2519 | XSETBUFFER (obuffer, current_buffer); |
2520 | okeymap = current_buffer->keymap; | |
30c78175 | 2521 | |
d0d6b7c5 | 2522 | specbind (Qinhibit_quit, Qt); |
6545aada | 2523 | specbind (Qlast_nonmenu_event, Qt); |
3b9a3dfa | 2524 | |
7074fde6 | 2525 | running_asynch_code = 1; |
3b9a3dfa RS |
2526 | internal_condition_case_1 (read_process_output_call, |
2527 | Fcons (outstream, | |
2528 | Fcons (proc, | |
7074fde6 FP |
2529 | Fcons (make_string (chars, |
2530 | nchars), | |
3b9a3dfa RS |
2531 | Qnil))), |
2532 | !NILP (Vdebug_on_error) ? Qnil : Qerror, | |
2533 | read_process_output_error_handler); | |
7074fde6 FP |
2534 | running_asynch_code = 0; |
2535 | restore_match_data (); | |
d0d6b7c5 | 2536 | |
592ce97f | 2537 | /* Handling the process output should not deactivate the mark. */ |
30c78175 RS |
2538 | Vdeactivate_mark = odeactivate; |
2539 | ||
7973cfa8 RS |
2540 | #if 0 /* Call record_asynch_buffer_change unconditionally, |
2541 | because we might have changed minor modes or other things | |
2542 | that affect key bindings. */ | |
dfc21838 RS |
2543 | if (! EQ (Fcurrent_buffer (), obuffer) |
2544 | || ! EQ (current_buffer->keymap, okeymap)) | |
7973cfa8 | 2545 | #endif |
927e08be RS |
2546 | /* But do it only if the caller is actually going to read events. |
2547 | Otherwise there's no need to make him wake up, and it could | |
2548 | cause trouble (for example it would make Fsit_for return). */ | |
2549 | if (waiting_for_user_input_p == -1) | |
2550 | record_asynch_buffer_change (); | |
d72534ba | 2551 | |
d0d6b7c5 JB |
2552 | #ifdef VMS |
2553 | start_vms_process_read (vs); | |
2554 | #endif | |
2ea6d561 | 2555 | unbind_to (count, Qnil); |
d0d6b7c5 JB |
2556 | return nchars; |
2557 | } | |
2558 | ||
2559 | /* If no filter, write into buffer if it isn't dead. */ | |
2560 | if (!NILP (p->buffer) && !NILP (XBUFFER (p->buffer)->name)) | |
2561 | { | |
b0310da4 JB |
2562 | Lisp_Object old_read_only; |
2563 | Lisp_Object old_begv, old_zv; | |
30c78175 RS |
2564 | Lisp_Object odeactivate; |
2565 | ||
2566 | odeactivate = Vdeactivate_mark; | |
d0d6b7c5 JB |
2567 | |
2568 | Fset_buffer (p->buffer); | |
6ec8bbd2 | 2569 | opoint = PT; |
b0310da4 | 2570 | old_read_only = current_buffer->read_only; |
22719df2 KH |
2571 | XSETFASTINT (old_begv, BEGV); |
2572 | XSETFASTINT (old_zv, ZV); | |
b0310da4 JB |
2573 | |
2574 | current_buffer->read_only = Qnil; | |
d0d6b7c5 JB |
2575 | |
2576 | /* Insert new output into buffer | |
2577 | at the current end-of-output marker, | |
2578 | thus preserving logical ordering of input and output. */ | |
2579 | if (XMARKER (p->mark)->buffer) | |
53aad33f | 2580 | SET_PT (clip_to_bounds (BEGV, marker_position (p->mark), ZV)); |
d0d6b7c5 JB |
2581 | else |
2582 | SET_PT (ZV); | |
b0310da4 JB |
2583 | |
2584 | /* If the output marker is outside of the visible region, save | |
2585 | the restriction and widen. */ | |
6ec8bbd2 | 2586 | if (! (BEGV <= PT && PT <= ZV)) |
b0310da4 JB |
2587 | Fwiden (); |
2588 | ||
2589 | /* Make sure opoint floats ahead of any new text, just as point | |
2590 | would. */ | |
6ec8bbd2 | 2591 | if (PT <= opoint) |
d0d6b7c5 JB |
2592 | opoint += nchars; |
2593 | ||
b0310da4 | 2594 | /* Insert after old_begv, but before old_zv. */ |
6ec8bbd2 | 2595 | if (PT < XFASTINT (old_begv)) |
7c6f34f0 | 2596 | XSETFASTINT (old_begv, XFASTINT (old_begv) + nchars); |
6ec8bbd2 | 2597 | if (PT <= XFASTINT (old_zv)) |
7c6f34f0 | 2598 | XSETFASTINT (old_zv, XFASTINT (old_zv) + nchars); |
b0310da4 | 2599 | |
d0d6b7c5 JB |
2600 | /* Insert before markers in case we are inserting where |
2601 | the buffer's mark is, and the user's next command is Meta-y. */ | |
2602 | insert_before_markers (chars, nchars); | |
6ec8bbd2 | 2603 | Fset_marker (p->mark, make_number (PT), p->buffer); |
b0310da4 | 2604 | |
d0d6b7c5 JB |
2605 | update_mode_lines++; |
2606 | ||
b0310da4 JB |
2607 | /* If the restriction isn't what it should be, set it. */ |
2608 | if (XFASTINT (old_begv) != BEGV || XFASTINT (old_zv) != ZV) | |
2609 | Fnarrow_to_region (old_begv, old_zv); | |
2610 | ||
592ce97f | 2611 | /* Handling the process output should not deactivate the mark. */ |
30c78175 RS |
2612 | Vdeactivate_mark = odeactivate; |
2613 | ||
b0310da4 | 2614 | current_buffer->read_only = old_read_only; |
d0d6b7c5 JB |
2615 | SET_PT (opoint); |
2616 | set_buffer_internal (old); | |
2617 | } | |
2618 | #ifdef VMS | |
2619 | start_vms_process_read (vs); | |
2620 | #endif | |
2621 | return nchars; | |
2622 | } | |
2623 | ||
2624 | DEFUN ("waiting-for-user-input-p", Fwaiting_for_user_input_p, Swaiting_for_user_input_p, | |
2625 | 0, 0, 0, | |
8b4d685f | 2626 | "Returns non-nil if emacs is waiting for input from the user.\n\ |
d0d6b7c5 JB |
2627 | This is intended for use by asynchronous process output filters and sentinels.") |
2628 | () | |
2629 | { | |
8b4d685f | 2630 | return (waiting_for_user_input_p ? Qt : Qnil); |
d0d6b7c5 JB |
2631 | } |
2632 | \f | |
2633 | /* Sending data to subprocess */ | |
2634 | ||
2635 | jmp_buf send_process_frame; | |
2636 | ||
2637 | SIGTYPE | |
2638 | send_process_trap () | |
2639 | { | |
2640 | #ifdef BSD4_1 | |
2641 | sigrelse (SIGPIPE); | |
2642 | sigrelse (SIGALRM); | |
2643 | #endif /* BSD4_1 */ | |
2644 | longjmp (send_process_frame, 1); | |
2645 | } | |
2646 | ||
4556b700 RS |
2647 | /* Send some data to process PROC. |
2648 | BUF is the beginning of the data; LEN is the number of characters. | |
2649 | OBJECT is the Lisp object that the data comes from. */ | |
2650 | ||
2651 | send_process (proc, buf, len, object) | |
ecd1f654 | 2652 | volatile Lisp_Object proc; |
d0d6b7c5 JB |
2653 | char *buf; |
2654 | int len; | |
4556b700 | 2655 | Lisp_Object object; |
d0d6b7c5 | 2656 | { |
ecd1f654 | 2657 | /* Use volatile to protect variables from being clobbered by longjmp. */ |
d0d6b7c5 | 2658 | int rv; |
ecd1f654 | 2659 | volatile unsigned char *procname = XSTRING (XPROCESS (proc)->name)->data; |
6044e593 RS |
2660 | struct gcpro gcpro1; |
2661 | ||
2662 | GCPRO1 (object); | |
d0d6b7c5 | 2663 | |
d0d6b7c5 JB |
2664 | #ifdef VMS |
2665 | struct Lisp_Process *p = XPROCESS (proc); | |
2666 | VMS_PROC_STUFF *vs, *get_vms_process_pointer(); | |
2667 | #endif /* VMS */ | |
2668 | ||
2669 | if (! NILP (XPROCESS (proc)->raw_status_low)) | |
2670 | update_status (XPROCESS (proc)); | |
2671 | if (! EQ (XPROCESS (proc)->status, Qrun)) | |
2672 | error ("Process %s not running", procname); | |
2673 | ||
2674 | #ifdef VMS | |
2675 | vs = get_vms_process_pointer (p->pid); | |
2676 | if (vs == 0) | |
2677 | error ("Could not find this process: %x", p->pid); | |
2678 | else if (write_to_vms_process (vs, buf, len)) | |
2679 | ; | |
2680 | #else | |
4556b700 RS |
2681 | |
2682 | if (pty_max_bytes == 0) | |
2683 | { | |
2684 | #if defined (HAVE_FPATHCONF) && defined (_PC_MAX_CANON) | |
2685 | pty_max_bytes = fpathconf (XFASTINT (XPROCESS (proc)->outfd), | |
2686 | _PC_MAX_CANON); | |
2687 | if (pty_max_bytes < 0) | |
2688 | pty_max_bytes = 250; | |
2689 | #else | |
2690 | pty_max_bytes = 250; | |
2691 | #endif | |
2692 | /* Deduct one, to leave space for the eof. */ | |
2693 | pty_max_bytes--; | |
2694 | } | |
2695 | ||
d0d6b7c5 JB |
2696 | if (!setjmp (send_process_frame)) |
2697 | while (len > 0) | |
2698 | { | |
2699 | int this = len; | |
4746118a | 2700 | SIGTYPE (*old_sigpipe)(); |
93b4f699 RS |
2701 | int flush_pty = 0; |
2702 | ||
4556b700 RS |
2703 | /* Decide how much data we can send in one batch. |
2704 | Long lines need to be split into multiple batches. */ | |
2705 | if (!NILP (XPROCESS (proc)->pty_flag)) | |
93b4f699 | 2706 | { |
4556b700 RS |
2707 | /* Starting this at zero is always correct when not the first iteration |
2708 | because the previous iteration ended by sending C-d. | |
2709 | It may not be correct for the first iteration | |
2710 | if a partial line was sent in a separate send_process call. | |
2711 | If that proves worth handling, we need to save linepos | |
2712 | in the process object. */ | |
2713 | int linepos = 0; | |
2714 | char *ptr = buf; | |
2715 | char *end = buf + len; | |
2716 | ||
2717 | /* Scan through this text for a line that is too long. */ | |
2718 | while (ptr != end && linepos < pty_max_bytes) | |
2719 | { | |
2720 | if (*ptr == '\n') | |
2721 | linepos = 0; | |
2722 | else | |
2723 | linepos++; | |
2724 | ptr++; | |
2725 | } | |
2726 | /* If we found one, break the line there | |
2727 | and put in a C-d to force the buffer through. */ | |
2728 | this = ptr - buf; | |
93b4f699 RS |
2729 | } |
2730 | ||
4556b700 RS |
2731 | /* Send this batch, using one or more write calls. */ |
2732 | while (this > 0) | |
d0d6b7c5 | 2733 | { |
4556b700 RS |
2734 | old_sigpipe = (SIGTYPE (*) ()) signal (SIGPIPE, send_process_trap); |
2735 | rv = write (XINT (XPROCESS (proc)->outfd), buf, this); | |
2736 | signal (SIGPIPE, old_sigpipe); | |
2737 | ||
2738 | if (rv < 0) | |
2739 | { | |
2740 | if (0 | |
d0d6b7c5 | 2741 | #ifdef EWOULDBLOCK |
4556b700 | 2742 | || errno == EWOULDBLOCK |
d0d6b7c5 JB |
2743 | #endif |
2744 | #ifdef EAGAIN | |
4556b700 | 2745 | || errno == EAGAIN |
d0d6b7c5 | 2746 | #endif |
4556b700 RS |
2747 | ) |
2748 | /* Buffer is full. Wait, accepting input; | |
2749 | that may allow the program | |
2750 | to finish doing output and read more. */ | |
2751 | { | |
2752 | Lisp_Object zero; | |
2753 | int offset; | |
2754 | ||
2755 | /* Running filters might relocate buffers or strings. | |
2756 | Arrange to relocate BUF. */ | |
2757 | if (BUFFERP (object)) | |
2758 | offset = BUF_PTR_CHAR_POS (XBUFFER (object), | |
2759 | (unsigned char *) buf); | |
2760 | else if (STRINGP (object)) | |
2761 | offset = buf - (char *) XSTRING (object)->data; | |
2762 | ||
22719df2 | 2763 | XSETFASTINT (zero, 0); |
4556b700 RS |
2764 | wait_reading_process_input (1, 0, zero, 0); |
2765 | ||
2766 | if (BUFFERP (object)) | |
2767 | buf = (char *) BUF_CHAR_ADDRESS (XBUFFER (object), offset); | |
2768 | else if (STRINGP (object)) | |
2769 | buf = offset + (char *) XSTRING (object)->data; | |
2770 | ||
2771 | rv = 0; | |
2772 | } | |
2773 | else | |
2774 | /* This is a real error. */ | |
2775 | report_file_error ("writing to process", Fcons (proc, Qnil)); | |
d0d6b7c5 | 2776 | } |
4556b700 RS |
2777 | buf += rv; |
2778 | len -= rv; | |
2779 | this -= rv; | |
d0d6b7c5 | 2780 | } |
f76475ad | 2781 | |
4556b700 RS |
2782 | /* If we sent just part of the string, put in an EOF |
2783 | to force it through, before we send the rest. */ | |
2784 | if (len > 0) | |
2785 | Fprocess_send_eof (proc); | |
d0d6b7c5 JB |
2786 | } |
2787 | #endif | |
2788 | else | |
2789 | { | |
2790 | XPROCESS (proc)->raw_status_low = Qnil; | |
2791 | XPROCESS (proc)->raw_status_high = Qnil; | |
2792 | XPROCESS (proc)->status = Fcons (Qexit, Fcons (make_number (256), Qnil)); | |
2793 | XSETINT (XPROCESS (proc)->tick, ++process_tick); | |
2794 | deactivate_process (proc); | |
2795 | #ifdef VMS | |
2796 | error ("Error writing to process %s; closed it", procname); | |
2797 | #else | |
2798 | error ("SIGPIPE raised on process %s; closed it", procname); | |
2799 | #endif | |
2800 | } | |
6044e593 RS |
2801 | |
2802 | UNGCPRO; | |
d0d6b7c5 JB |
2803 | } |
2804 | ||
2805 | DEFUN ("process-send-region", Fprocess_send_region, Sprocess_send_region, | |
2806 | 3, 3, 0, | |
2807 | "Send current contents of region as input to PROCESS.\n\ | |
ebb9e16f JB |
2808 | PROCESS may be a process, a buffer, the name of a process or buffer, or\n\ |
2809 | nil, indicating the current buffer's process.\n\ | |
d0d6b7c5 JB |
2810 | Called from program, takes three arguments, PROCESS, START and END.\n\ |
2811 | If the region is more than 500 characters long,\n\ | |
2812 | it is sent in several bunches. This may happen even for shorter regions.\n\ | |
2813 | Output from processes can arrive in between bunches.") | |
2814 | (process, start, end) | |
2815 | Lisp_Object process, start, end; | |
2816 | { | |
2817 | Lisp_Object proc; | |
2818 | int start1; | |
2819 | ||
2820 | proc = get_process (process); | |
2821 | validate_region (&start, &end); | |
2822 | ||
2823 | if (XINT (start) < GPT && XINT (end) > GPT) | |
2824 | move_gap (start); | |
2825 | ||
2826 | start1 = XINT (start); | |
4556b700 RS |
2827 | send_process (proc, &FETCH_CHAR (start1), XINT (end) - XINT (start), |
2828 | Fcurrent_buffer ()); | |
d0d6b7c5 JB |
2829 | |
2830 | return Qnil; | |
2831 | } | |
2832 | ||
2833 | DEFUN ("process-send-string", Fprocess_send_string, Sprocess_send_string, | |
2834 | 2, 2, 0, | |
2835 | "Send PROCESS the contents of STRING as input.\n\ | |
ebb9e16f JB |
2836 | PROCESS may be a process, a buffer, the name of a process or buffer, or\n\ |
2837 | nil, indicating the current buffer's process.\n\ | |
d0d6b7c5 JB |
2838 | If STRING is more than 500 characters long,\n\ |
2839 | it is sent in several bunches. This may happen even for shorter strings.\n\ | |
2840 | Output from processes can arrive in between bunches.") | |
2841 | (process, string) | |
2842 | Lisp_Object process, string; | |
2843 | { | |
2844 | Lisp_Object proc; | |
2845 | CHECK_STRING (string, 1); | |
2846 | proc = get_process (process); | |
4556b700 | 2847 | send_process (proc, XSTRING (string)->data, XSTRING (string)->size, string); |
d0d6b7c5 JB |
2848 | return Qnil; |
2849 | } | |
2850 | \f | |
2851 | /* send a signal number SIGNO to PROCESS. | |
2852 | CURRENT_GROUP means send to the process group that currently owns | |
2853 | the terminal being used to communicate with PROCESS. | |
2854 | This is used for various commands in shell mode. | |
2855 | If NOMSG is zero, insert signal-announcements into process's buffers | |
b0310da4 JB |
2856 | right away. |
2857 | ||
2858 | If we can, we try to signal PROCESS by sending control characters | |
e333e864 | 2859 | down the pty. This allows us to signal inferiors who have changed |
b0310da4 | 2860 | their uid, for which killpg would return an EPERM error. */ |
d0d6b7c5 | 2861 | |
f9738840 | 2862 | static void |
d0d6b7c5 JB |
2863 | process_send_signal (process, signo, current_group, nomsg) |
2864 | Lisp_Object process; | |
2865 | int signo; | |
2866 | Lisp_Object current_group; | |
2867 | int nomsg; | |
2868 | { | |
2869 | Lisp_Object proc; | |
2870 | register struct Lisp_Process *p; | |
2871 | int gid; | |
2872 | int no_pgrp = 0; | |
2873 | ||
2874 | proc = get_process (process); | |
2875 | p = XPROCESS (proc); | |
2876 | ||
2877 | if (!EQ (p->childp, Qt)) | |
2878 | error ("Process %s is not a subprocess", | |
2879 | XSTRING (p->name)->data); | |
a9f2c884 | 2880 | if (XINT (p->infd) < 0) |
d0d6b7c5 JB |
2881 | error ("Process %s is not active", |
2882 | XSTRING (p->name)->data); | |
2883 | ||
2884 | if (NILP (p->pty_flag)) | |
2885 | current_group = Qnil; | |
2886 | ||
d0d6b7c5 JB |
2887 | /* If we are using pgrps, get a pgrp number and make it negative. */ |
2888 | if (!NILP (current_group)) | |
2889 | { | |
b0310da4 | 2890 | #ifdef SIGNALS_VIA_CHARACTERS |
d0d6b7c5 JB |
2891 | /* If possible, send signals to the entire pgrp |
2892 | by sending an input character to it. */ | |
b0310da4 | 2893 | |
6be429b1 JB |
2894 | /* TERMIOS is the latest and bestest, and seems most likely to |
2895 | work. If the system has it, use it. */ | |
2896 | #ifdef HAVE_TERMIOS | |
2897 | struct termios t; | |
2898 | ||
2899 | switch (signo) | |
2900 | { | |
2901 | case SIGINT: | |
a9f2c884 | 2902 | tcgetattr (XINT (p->infd), &t); |
4556b700 | 2903 | send_process (proc, &t.c_cc[VINTR], 1, Qnil); |
a87b802f | 2904 | return; |
6be429b1 JB |
2905 | |
2906 | case SIGQUIT: | |
a9f2c884 | 2907 | tcgetattr (XINT (p->infd), &t); |
4556b700 | 2908 | send_process (proc, &t.c_cc[VQUIT], 1, Qnil); |
a87b802f | 2909 | return; |
6be429b1 JB |
2910 | |
2911 | case SIGTSTP: | |
a9f2c884 | 2912 | tcgetattr (XINT (p->infd), &t); |
d0adf46f | 2913 | #if defined (VSWTCH) && !defined (PREFER_VSUSP) |
4556b700 | 2914 | send_process (proc, &t.c_cc[VSWTCH], 1, Qnil); |
6be429b1 | 2915 | #else |
4556b700 | 2916 | send_process (proc, &t.c_cc[VSUSP], 1, Qnil); |
6be429b1 | 2917 | #endif |
a87b802f | 2918 | return; |
6be429b1 JB |
2919 | } |
2920 | ||
2921 | #else /* ! HAVE_TERMIOS */ | |
2922 | ||
b0310da4 JB |
2923 | /* On Berkeley descendants, the following IOCTL's retrieve the |
2924 | current control characters. */ | |
d0d6b7c5 | 2925 | #if defined (TIOCGLTC) && defined (TIOCGETC) |
b0310da4 | 2926 | |
d0d6b7c5 JB |
2927 | struct tchars c; |
2928 | struct ltchars lc; | |
2929 | ||
2930 | switch (signo) | |
2931 | { | |
2932 | case SIGINT: | |
a9f2c884 | 2933 | ioctl (XINT (p->infd), TIOCGETC, &c); |
4556b700 | 2934 | send_process (proc, &c.t_intrc, 1, Qnil); |
f9738840 | 2935 | return; |
d0d6b7c5 | 2936 | case SIGQUIT: |
a9f2c884 | 2937 | ioctl (XINT (p->infd), TIOCGETC, &c); |
4556b700 | 2938 | send_process (proc, &c.t_quitc, 1, Qnil); |
f9738840 | 2939 | return; |
0ad77c54 | 2940 | #ifdef SIGTSTP |
d0d6b7c5 | 2941 | case SIGTSTP: |
a9f2c884 | 2942 | ioctl (XINT (p->infd), TIOCGLTC, &lc); |
4556b700 | 2943 | send_process (proc, &lc.t_suspc, 1, Qnil); |
f9738840 | 2944 | return; |
b0310da4 | 2945 | #endif /* ! defined (SIGTSTP) */ |
d0d6b7c5 | 2946 | } |
b0310da4 JB |
2947 | |
2948 | #else /* ! defined (TIOCGLTC) && defined (TIOCGETC) */ | |
2949 | ||
2950 | /* On SYSV descendants, the TCGETA ioctl retrieves the current control | |
2951 | characters. */ | |
2952 | #ifdef TCGETA | |
d0d6b7c5 JB |
2953 | struct termio t; |
2954 | switch (signo) | |
2955 | { | |
2956 | case SIGINT: | |
a9f2c884 | 2957 | ioctl (XINT (p->infd), TCGETA, &t); |
4556b700 | 2958 | send_process (proc, &t.c_cc[VINTR], 1, Qnil); |
f9738840 | 2959 | return; |
d0d6b7c5 | 2960 | case SIGQUIT: |
a9f2c884 | 2961 | ioctl (XINT (p->infd), TCGETA, &t); |
4556b700 | 2962 | send_process (proc, &t.c_cc[VQUIT], 1, Qnil); |
f9738840 | 2963 | return; |
7d79e3b4 | 2964 | #ifdef SIGTSTP |
d0d6b7c5 | 2965 | case SIGTSTP: |
a9f2c884 | 2966 | ioctl (XINT (p->infd), TCGETA, &t); |
4556b700 | 2967 | send_process (proc, &t.c_cc[VSWTCH], 1, Qnil); |
f9738840 | 2968 | return; |
b0310da4 | 2969 | #endif /* ! defined (SIGTSTP) */ |
d0d6b7c5 | 2970 | } |
b0310da4 JB |
2971 | #else /* ! defined (TCGETA) */ |
2972 | Your configuration files are messed up. | |
2973 | /* If your system configuration files define SIGNALS_VIA_CHARACTERS, | |
2974 | you'd better be using one of the alternatives above! */ | |
2975 | #endif /* ! defined (TCGETA) */ | |
2976 | #endif /* ! defined (TIOCGLTC) && defined (TIOCGETC) */ | |
6be429b1 | 2977 | #endif /* ! defined HAVE_TERMIOS */ |
b0310da4 | 2978 | #endif /* ! defined (SIGNALS_VIA_CHARACTERS) */ |
d0d6b7c5 | 2979 | |
301c3fe4 | 2980 | #ifdef TIOCGPGRP |
d0d6b7c5 JB |
2981 | /* Get the pgrp using the tty itself, if we have that. |
2982 | Otherwise, use the pty to get the pgrp. | |
2983 | On pfa systems, saka@pfu.fujitsu.co.JP writes: | |
b0310da4 JB |
2984 | "TIOCGPGRP symbol defined in sys/ioctl.h at E50. |
2985 | But, TIOCGPGRP does not work on E50 ;-P works fine on E60" | |
d0d6b7c5 JB |
2986 | His patch indicates that if TIOCGPGRP returns an error, then |
2987 | we should just assume that p->pid is also the process group id. */ | |
2988 | { | |
2989 | int err; | |
2990 | ||
2991 | if (!NILP (p->subtty)) | |
2992 | err = ioctl (XFASTINT (p->subtty), TIOCGPGRP, &gid); | |
2993 | else | |
a9f2c884 | 2994 | err = ioctl (XINT (p->infd), TIOCGPGRP, &gid); |
d0d6b7c5 JB |
2995 | |
2996 | #ifdef pfa | |
2997 | if (err == -1) | |
2998 | gid = - XFASTINT (p->pid); | |
301c3fe4 | 2999 | #endif /* ! defined (pfa) */ |
d0d6b7c5 JB |
3000 | } |
3001 | if (gid == -1) | |
3002 | no_pgrp = 1; | |
3003 | else | |
3004 | gid = - gid; | |
b0310da4 | 3005 | #else /* ! defined (TIOCGPGRP ) */ |
301c3fe4 JB |
3006 | /* Can't select pgrps on this system, so we know that |
3007 | the child itself heads the pgrp. */ | |
3008 | gid = - XFASTINT (p->pid); | |
3009 | #endif /* ! defined (TIOCGPGRP ) */ | |
d0d6b7c5 JB |
3010 | } |
3011 | else | |
3012 | gid = - XFASTINT (p->pid); | |
d0d6b7c5 JB |
3013 | |
3014 | switch (signo) | |
3015 | { | |
3016 | #ifdef SIGCONT | |
3017 | case SIGCONT: | |
3018 | p->raw_status_low = Qnil; | |
3019 | p->raw_status_high = Qnil; | |
3020 | p->status = Qrun; | |
3021 | XSETINT (p->tick, ++process_tick); | |
3022 | if (!nomsg) | |
3023 | status_notify (); | |
3024 | break; | |
301c3fe4 | 3025 | #endif /* ! defined (SIGCONT) */ |
d0d6b7c5 JB |
3026 | case SIGINT: |
3027 | #ifdef VMS | |
4556b700 | 3028 | send_process (proc, "\003", 1, Qnil); /* ^C */ |
d0d6b7c5 JB |
3029 | goto whoosh; |
3030 | #endif | |
3031 | case SIGQUIT: | |
3032 | #ifdef VMS | |
4556b700 | 3033 | send_process (proc, "\031", 1, Qnil); /* ^Y */ |
d0d6b7c5 JB |
3034 | goto whoosh; |
3035 | #endif | |
3036 | case SIGKILL: | |
3037 | #ifdef VMS | |
3038 | sys$forcex (&(XFASTINT (p->pid)), 0, 1); | |
3039 | whoosh: | |
3040 | #endif | |
a9f2c884 | 3041 | flush_pending_output (XINT (p->infd)); |
d0d6b7c5 JB |
3042 | break; |
3043 | } | |
3044 | ||
3045 | /* If we don't have process groups, send the signal to the immediate | |
3046 | subprocess. That isn't really right, but it's better than any | |
3047 | obvious alternative. */ | |
3048 | if (no_pgrp) | |
3049 | { | |
3050 | kill (XFASTINT (p->pid), signo); | |
3051 | return; | |
3052 | } | |
3053 | ||
3054 | /* gid may be a pid, or minus a pgrp's number */ | |
3055 | #ifdef TIOCSIGSEND | |
3056 | if (!NILP (current_group)) | |
a9f2c884 | 3057 | ioctl (XINT (p->infd), TIOCSIGSEND, signo); |
d0d6b7c5 JB |
3058 | else |
3059 | { | |
3060 | gid = - XFASTINT (p->pid); | |
3061 | kill (gid, signo); | |
3062 | } | |
301c3fe4 | 3063 | #else /* ! defined (TIOCSIGSEND) */ |
d0d6b7c5 | 3064 | EMACS_KILLPG (-gid, signo); |
301c3fe4 | 3065 | #endif /* ! defined (TIOCSIGSEND) */ |
d0d6b7c5 JB |
3066 | } |
3067 | ||
3068 | DEFUN ("interrupt-process", Finterrupt_process, Sinterrupt_process, 0, 2, 0, | |
3069 | "Interrupt process PROCESS. May be process or name of one.\n\ | |
ebb9e16f | 3070 | PROCESS may be a process, a buffer, or the name of a process or buffer.\n\ |
e333e864 | 3071 | nil or no arg means current buffer's process.\n\ |
d0d6b7c5 JB |
3072 | Second arg CURRENT-GROUP non-nil means send signal to\n\ |
3073 | the current process-group of the process's controlling terminal\n\ | |
3074 | rather than to the process's own process group.\n\ | |
3075 | If the process is a shell, this means interrupt current subjob\n\ | |
3076 | rather than the shell.") | |
3077 | (process, current_group) | |
3078 | Lisp_Object process, current_group; | |
3079 | { | |
3080 | process_send_signal (process, SIGINT, current_group, 0); | |
3081 | return process; | |
3082 | } | |
3083 | ||
3084 | DEFUN ("kill-process", Fkill_process, Skill_process, 0, 2, 0, | |
3085 | "Kill process PROCESS. May be process or name of one.\n\ | |
3086 | See function `interrupt-process' for more details on usage.") | |
3087 | (process, current_group) | |
3088 | Lisp_Object process, current_group; | |
3089 | { | |
3090 | process_send_signal (process, SIGKILL, current_group, 0); | |
3091 | return process; | |
3092 | } | |
3093 | ||
3094 | DEFUN ("quit-process", Fquit_process, Squit_process, 0, 2, 0, | |
3095 | "Send QUIT signal to process PROCESS. May be process or name of one.\n\ | |
3096 | See function `interrupt-process' for more details on usage.") | |
3097 | (process, current_group) | |
3098 | Lisp_Object process, current_group; | |
3099 | { | |
3100 | process_send_signal (process, SIGQUIT, current_group, 0); | |
3101 | return process; | |
3102 | } | |
3103 | ||
3104 | DEFUN ("stop-process", Fstop_process, Sstop_process, 0, 2, 0, | |
3105 | "Stop process PROCESS. May be process or name of one.\n\ | |
3106 | See function `interrupt-process' for more details on usage.") | |
3107 | (process, current_group) | |
3108 | Lisp_Object process, current_group; | |
3109 | { | |
3110 | #ifndef SIGTSTP | |
3111 | error ("no SIGTSTP support"); | |
3112 | #else | |
3113 | process_send_signal (process, SIGTSTP, current_group, 0); | |
3114 | #endif | |
3115 | return process; | |
3116 | } | |
3117 | ||
3118 | DEFUN ("continue-process", Fcontinue_process, Scontinue_process, 0, 2, 0, | |
3119 | "Continue process PROCESS. May be process or name of one.\n\ | |
3120 | See function `interrupt-process' for more details on usage.") | |
3121 | (process, current_group) | |
3122 | Lisp_Object process, current_group; | |
3123 | { | |
3124 | #ifdef SIGCONT | |
3125 | process_send_signal (process, SIGCONT, current_group, 0); | |
3126 | #else | |
3127 | error ("no SIGCONT support"); | |
3128 | #endif | |
3129 | return process; | |
3130 | } | |
3131 | ||
3132 | DEFUN ("signal-process", Fsignal_process, Ssignal_process, | |
3133 | 2, 2, "nProcess number: \nnSignal code: ", | |
4766242d RS |
3134 | "Send the process with process id PID the signal with code SIGCODE.\n\ |
3135 | PID must be an integer. The process need not be a child of this Emacs.\n\ | |
3136 | SIGCODE may be an integer, or a symbol whose name is a signal name.") | |
3137 | (pid, sigcode) | |
3138 | Lisp_Object pid, sigcode; | |
d0d6b7c5 JB |
3139 | { |
3140 | CHECK_NUMBER (pid, 0); | |
4766242d RS |
3141 | |
3142 | #define handle_signal(NAME, VALUE) \ | |
3143 | else if (!strcmp (name, NAME)) \ | |
3144 | XSETINT (sigcode, VALUE) | |
3145 | ||
3146 | if (INTEGERP (sigcode)) | |
3147 | ; | |
3148 | else | |
3149 | { | |
3150 | unsigned char *name; | |
3151 | ||
3152 | CHECK_SYMBOL (sigcode, 1); | |
3153 | name = XSYMBOL (sigcode)->name->data; | |
3154 | ||
3155 | if (0) | |
3156 | ; | |
3157 | #ifdef SIGHUP | |
3158 | handle_signal ("SIGHUP", SIGHUP); | |
3159 | #endif | |
3160 | #ifdef SIGINT | |
3161 | handle_signal ("SIGINT", SIGINT); | |
3162 | #endif | |
3163 | #ifdef SIGQUIT | |
3164 | handle_signal ("SIGQUIT", SIGQUIT); | |
3165 | #endif | |
3166 | #ifdef SIGILL | |
3167 | handle_signal ("SIGILL", SIGILL); | |
3168 | #endif | |
3169 | #ifdef SIGABRT | |
3170 | handle_signal ("SIGABRT", SIGABRT); | |
3171 | #endif | |
3172 | #ifdef SIGEMT | |
3173 | handle_signal ("SIGEMT", SIGEMT); | |
3174 | #endif | |
3175 | #ifdef SIGKILL | |
3176 | handle_signal ("SIGKILL", SIGKILL); | |
3177 | #endif | |
3178 | #ifdef SIGFPE | |
3179 | handle_signal ("SIGFPE", SIGFPE); | |
3180 | #endif | |
3181 | #ifdef SIGBUS | |
3182 | handle_signal ("SIGBUS", SIGBUS); | |
3183 | #endif | |
3184 | #ifdef SIGSEGV | |
3185 | handle_signal ("SIGSEGV", SIGSEGV); | |
3186 | #endif | |
3187 | #ifdef SIGSYS | |
3188 | handle_signal ("SIGSYS", SIGSYS); | |
3189 | #endif | |
3190 | #ifdef SIGPIPE | |
3191 | handle_signal ("SIGPIPE", SIGPIPE); | |
3192 | #endif | |
3193 | #ifdef SIGALRM | |
3194 | handle_signal ("SIGALRM", SIGALRM); | |
3195 | #endif | |
3196 | #ifdef SIGTERM | |
3197 | handle_signal ("SIGTERM", SIGTERM); | |
3198 | #endif | |
3199 | #ifdef SIGURG | |
3200 | handle_signal ("SIGURG", SIGURG); | |
3201 | #endif | |
3202 | #ifdef SIGSTOP | |
3203 | handle_signal ("SIGSTOP", SIGSTOP); | |
3204 | #endif | |
3205 | #ifdef SIGTSTP | |
3206 | handle_signal ("SIGTSTP", SIGTSTP); | |
3207 | #endif | |
3208 | #ifdef SIGCONT | |
3209 | handle_signal ("SIGCONT", SIGCONT); | |
3210 | #endif | |
3211 | #ifdef SIGCHLD | |
3212 | handle_signal ("SIGCHLD", SIGCHLD); | |
3213 | #endif | |
3214 | #ifdef SIGTTIN | |
3215 | handle_signal ("SIGTTIN", SIGTTIN); | |
3216 | #endif | |
3217 | #ifdef SIGTTOU | |
3218 | handle_signal ("SIGTTOU", SIGTTOU); | |
3219 | #endif | |
3220 | #ifdef SIGIO | |
3221 | handle_signal ("SIGIO", SIGIO); | |
3222 | #endif | |
3223 | #ifdef SIGXCPU | |
3224 | handle_signal ("SIGXCPU", SIGXCPU); | |
3225 | #endif | |
3226 | #ifdef SIGXFSZ | |
3227 | handle_signal ("SIGXFSZ", SIGXFSZ); | |
3228 | #endif | |
3229 | #ifdef SIGVTALRM | |
3230 | handle_signal ("SIGVTALRM", SIGVTALRM); | |
3231 | #endif | |
3232 | #ifdef SIGPROF | |
3233 | handle_signal ("SIGPROF", SIGPROF); | |
3234 | #endif | |
3235 | #ifdef SIGWINCH | |
3236 | handle_signal ("SIGWINCH", SIGWINCH); | |
3237 | #endif | |
3238 | #ifdef SIGINFO | |
3239 | handle_signal ("SIGINFO", SIGINFO); | |
3240 | #endif | |
3241 | #ifdef SIGUSR1 | |
3242 | handle_signal ("SIGUSR1", SIGUSR1); | |
3243 | #endif | |
3244 | #ifdef SIGUSR2 | |
3245 | handle_signal ("SIGUSR2", SIGUSR2); | |
3246 | #endif | |
3247 | else | |
9fa195a2 | 3248 | error ("Undefined signal name %s", name); |
4766242d RS |
3249 | } |
3250 | ||
3251 | #undef handle_signal | |
3252 | ||
4766242d | 3253 | return make_number (kill (XINT (pid), XINT (sigcode))); |
d0d6b7c5 JB |
3254 | } |
3255 | ||
3256 | DEFUN ("process-send-eof", Fprocess_send_eof, Sprocess_send_eof, 0, 1, 0, | |
3257 | "Make PROCESS see end-of-file in its input.\n\ | |
3258 | Eof comes after any text already sent to it.\n\ | |
ebb9e16f | 3259 | PROCESS may be a process, a buffer, the name of a process or buffer, or\n\ |
d33a00f2 RS |
3260 | nil, indicating the current buffer's process.\n\ |
3261 | If PROCESS is a network connection, or is a process communicating\n\ | |
3262 | through a pipe (as opposed to a pty), then you cannot send any more\n\ | |
3263 | text to PROCESS after you call this function.") | |
d0d6b7c5 JB |
3264 | (process) |
3265 | Lisp_Object process; | |
3266 | { | |
3267 | Lisp_Object proc; | |
3268 | ||
3269 | proc = get_process (process); | |
577d03d5 RS |
3270 | |
3271 | /* Make sure the process is really alive. */ | |
3272 | if (! NILP (XPROCESS (proc)->raw_status_low)) | |
3273 | update_status (XPROCESS (proc)); | |
3274 | if (! EQ (XPROCESS (proc)->status, Qrun)) | |
dcf970e6 | 3275 | error ("Process %s not running", XSTRING (XPROCESS (proc)->name)->data); |
577d03d5 | 3276 | |
d0d6b7c5 | 3277 | #ifdef VMS |
4556b700 | 3278 | send_process (proc, "\032", 1, Qnil); /* ^z */ |
d0d6b7c5 JB |
3279 | #else |
3280 | if (!NILP (XPROCESS (proc)->pty_flag)) | |
4556b700 | 3281 | send_process (proc, "\004", 1, Qnil); |
d0d6b7c5 JB |
3282 | else |
3283 | { | |
a9f2c884 | 3284 | close (XINT (XPROCESS (proc)->outfd)); |
1d056e64 | 3285 | XSETINT (XPROCESS (proc)->outfd, open (NULL_DEVICE, O_WRONLY)); |
d0d6b7c5 JB |
3286 | } |
3287 | #endif /* VMS */ | |
d0d6b7c5 JB |
3288 | return process; |
3289 | } | |
3290 | ||
3291 | /* Kill all processes associated with `buffer'. | |
3292 | If `buffer' is nil, kill all processes */ | |
3293 | ||
3294 | kill_buffer_processes (buffer) | |
3295 | Lisp_Object buffer; | |
3296 | { | |
3297 | Lisp_Object tail, proc; | |
3298 | ||
b5b502d6 | 3299 | for (tail = Vprocess_alist; GC_CONSP (tail); tail = XCONS (tail)->cdr) |
d0d6b7c5 JB |
3300 | { |
3301 | proc = XCONS (XCONS (tail)->car)->cdr; | |
b5b502d6 | 3302 | if (GC_PROCESSP (proc) |
d0d6b7c5 JB |
3303 | && (NILP (buffer) || EQ (XPROCESS (proc)->buffer, buffer))) |
3304 | { | |
3305 | if (NETCONN_P (proc)) | |
e1ab4959 | 3306 | Fdelete_process (proc); |
a9f2c884 | 3307 | else if (XINT (XPROCESS (proc)->infd) >= 0) |
d0d6b7c5 JB |
3308 | process_send_signal (proc, SIGHUP, Qnil, 1); |
3309 | } | |
3310 | } | |
3311 | } | |
3312 | \f | |
3313 | /* On receipt of a signal that a child status has changed, | |
3314 | loop asking about children with changed statuses until | |
3315 | the system says there are no more. | |
3316 | All we do is change the status; | |
3317 | we do not run sentinels or print notifications. | |
3318 | That is saved for the next time keyboard input is done, | |
3319 | in order to avoid timing errors. */ | |
3320 | ||
3321 | /** WARNING: this can be called during garbage collection. | |
3322 | Therefore, it must not be fooled by the presence of mark bits in | |
3323 | Lisp objects. */ | |
3324 | ||
3325 | /** USG WARNING: Although it is not obvious from the documentation | |
3326 | in signal(2), on a USG system the SIGCLD handler MUST NOT call | |
3327 | signal() before executing at least one wait(), otherwise the handler | |
3328 | will be called again, resulting in an infinite loop. The relevant | |
3329 | portion of the documentation reads "SIGCLD signals will be queued | |
3330 | and the signal-catching function will be continually reentered until | |
3331 | the queue is empty". Invoking signal() causes the kernel to reexamine | |
3332 | the SIGCLD queue. Fred Fish, UniSoft Systems Inc. */ | |
3333 | ||
3334 | SIGTYPE | |
3335 | sigchld_handler (signo) | |
3336 | int signo; | |
3337 | { | |
3338 | int old_errno = errno; | |
3339 | Lisp_Object proc; | |
3340 | register struct Lisp_Process *p; | |
6be429b1 | 3341 | extern EMACS_TIME *input_available_clear_time; |
d0d6b7c5 JB |
3342 | |
3343 | #ifdef BSD4_1 | |
3344 | extern int sigheld; | |
3345 | sigheld |= sigbit (SIGCHLD); | |
3346 | #endif | |
3347 | ||
3348 | while (1) | |
3349 | { | |
3350 | register int pid; | |
3351 | WAITTYPE w; | |
3352 | Lisp_Object tail; | |
3353 | ||
3354 | #ifdef WNOHANG | |
3355 | #ifndef WUNTRACED | |
3356 | #define WUNTRACED 0 | |
3357 | #endif /* no WUNTRACED */ | |
3358 | /* Keep trying to get a status until we get a definitive result. */ | |
3359 | do | |
3360 | { | |
3361 | errno = 0; | |
3362 | pid = wait3 (&w, WNOHANG | WUNTRACED, 0); | |
3363 | } | |
3364 | while (pid <= 0 && errno == EINTR); | |
3365 | ||
3366 | if (pid <= 0) | |
3367 | { | |
3368 | /* A real failure. We have done all our job, so return. */ | |
3369 | ||
3370 | /* USG systems forget handlers when they are used; | |
3371 | must reestablish each time */ | |
3c0ee47b | 3372 | #if defined (USG) && !defined (POSIX_SIGNALS) |
d0d6b7c5 JB |
3373 | signal (signo, sigchld_handler); /* WARNING - must come after wait3() */ |
3374 | #endif | |
3375 | #ifdef BSD4_1 | |
3376 | sigheld &= ~sigbit (SIGCHLD); | |
3377 | sigrelse (SIGCHLD); | |
3378 | #endif | |
3379 | errno = old_errno; | |
3380 | return; | |
3381 | } | |
3382 | #else | |
3383 | pid = wait (&w); | |
3384 | #endif /* no WNOHANG */ | |
3385 | ||
3386 | /* Find the process that signaled us, and record its status. */ | |
3387 | ||
3388 | p = 0; | |
7968cc2d | 3389 | for (tail = Vprocess_alist; CONSP (tail); tail = XCONS (tail)->cdr) |
d0d6b7c5 JB |
3390 | { |
3391 | proc = XCONS (XCONS (tail)->car)->cdr; | |
3392 | p = XPROCESS (proc); | |
3393 | if (EQ (p->childp, Qt) && XFASTINT (p->pid) == pid) | |
3394 | break; | |
3395 | p = 0; | |
3396 | } | |
3397 | ||
3398 | /* Look for an asynchronous process whose pid hasn't been filled | |
3399 | in yet. */ | |
3400 | if (p == 0) | |
7968cc2d | 3401 | for (tail = Vprocess_alist; CONSP (tail); tail = XCONS (tail)->cdr) |
d0d6b7c5 JB |
3402 | { |
3403 | proc = XCONS (XCONS (tail)->car)->cdr; | |
3404 | p = XPROCESS (proc); | |
bcd69aea | 3405 | if (INTEGERP (p->pid) && XINT (p->pid) == -1) |
d0d6b7c5 JB |
3406 | break; |
3407 | p = 0; | |
3408 | } | |
3409 | ||
3410 | /* Change the status of the process that was found. */ | |
3411 | if (p != 0) | |
3412 | { | |
3413 | union { int i; WAITTYPE wt; } u; | |
e98d950b | 3414 | int clear_desc_flag = 0; |
d0d6b7c5 JB |
3415 | |
3416 | XSETINT (p->tick, ++process_tick); | |
3417 | u.wt = w; | |
5fc0154c RS |
3418 | XSETINT (p->raw_status_low, u.i & 0xffff); |
3419 | XSETINT (p->raw_status_high, u.i >> 16); | |
d0d6b7c5 JB |
3420 | |
3421 | /* If process has terminated, stop waiting for its output. */ | |
e98d950b RS |
3422 | if ((WIFSIGNALED (w) || WIFEXITED (w)) |
3423 | && XINT (p->infd) >= 0) | |
3424 | clear_desc_flag = 1; | |
3425 | ||
3426 | /* We use clear_desc_flag to avoid a compiler bug in Microsoft C. */ | |
3427 | if (clear_desc_flag) | |
3428 | { | |
3429 | FD_CLR (XINT (p->infd), &input_wait_mask); | |
3430 | FD_CLR (XINT (p->infd), &non_keyboard_wait_mask); | |
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 | /* There was no asynchronous process found for that id. Check | |
3440 | if we have a synchronous process. */ | |
3441 | else | |
3442 | { | |
3443 | synch_process_alive = 0; | |
3444 | ||
3445 | /* Report the status of the synchronous process. */ | |
3446 | if (WIFEXITED (w)) | |
3447 | synch_process_retcode = WRETCODE (w); | |
3448 | else if (WIFSIGNALED (w)) | |
b97ad9ea RS |
3449 | { |
3450 | int code = WTERMSIG (w); | |
3451 | char *signame = 0; | |
3452 | ||
3453 | if (code < NSIG) | |
3454 | { | |
b0310da4 | 3455 | #ifndef VMS |
ed0cae05 RS |
3456 | /* Suppress warning if the table has const char *. */ |
3457 | signame = (char *) sys_siglist[code]; | |
b0310da4 | 3458 | #else |
b97ad9ea | 3459 | signame = sys_errlist[code]; |
b0310da4 | 3460 | #endif |
b97ad9ea RS |
3461 | } |
3462 | if (signame == 0) | |
3463 | signame = "unknown"; | |
3464 | ||
3465 | synch_process_death = signame; | |
3466 | } | |
6be429b1 JB |
3467 | |
3468 | /* Tell wait_reading_process_input that it needs to wake up and | |
3469 | look around. */ | |
3470 | if (input_available_clear_time) | |
3471 | EMACS_SET_SECS_USECS (*input_available_clear_time, 0, 0); | |
d0d6b7c5 JB |
3472 | } |
3473 | ||
3474 | /* On some systems, we must return right away. | |
3475 | If any more processes want to signal us, we will | |
3476 | get another signal. | |
3477 | Otherwise (on systems that have WNOHANG), loop around | |
3478 | to use up all the processes that have something to tell us. */ | |
e98d950b | 3479 | #if defined (USG) && ! (defined (HPUX) && defined (WNOHANG)) || defined (WINDOWSNT) |
3c0ee47b | 3480 | #if defined (USG) && ! defined (POSIX_SIGNALS) |
d0d6b7c5 JB |
3481 | signal (signo, sigchld_handler); |
3482 | #endif | |
3483 | errno = old_errno; | |
3484 | return; | |
3485 | #endif /* USG, but not HPUX with WNOHANG */ | |
3486 | } | |
3487 | } | |
3488 | \f | |
3489 | ||
3490 | static Lisp_Object | |
3491 | exec_sentinel_unwind (data) | |
3492 | Lisp_Object data; | |
3493 | { | |
3494 | XPROCESS (XCONS (data)->car)->sentinel = XCONS (data)->cdr; | |
3495 | return Qnil; | |
3496 | } | |
3497 | ||
3b9a3dfa RS |
3498 | static Lisp_Object |
3499 | exec_sentinel_error_handler (error) | |
3500 | Lisp_Object error; | |
3501 | { | |
3502 | cmd_error_internal (error, "error in process sentinel: "); | |
3503 | Vinhibit_quit = Qt; | |
3504 | update_echo_area (); | |
833ba342 | 3505 | Fsleep_for (make_number (2), Qnil); |
3b9a3dfa RS |
3506 | } |
3507 | ||
d0d6b7c5 JB |
3508 | static void |
3509 | exec_sentinel (proc, reason) | |
3510 | Lisp_Object proc, reason; | |
3511 | { | |
dfc21838 | 3512 | Lisp_Object sentinel, obuffer, odeactivate, okeymap; |
d0d6b7c5 JB |
3513 | register struct Lisp_Process *p = XPROCESS (proc); |
3514 | int count = specpdl_ptr - specpdl; | |
3515 | ||
dfc21838 RS |
3516 | /* No need to gcpro these, because all we do with them later |
3517 | is test them for EQness, and none of them should be a string. */ | |
8fb3cf64 | 3518 | odeactivate = Vdeactivate_mark; |
dfc21838 RS |
3519 | XSETBUFFER (obuffer, current_buffer); |
3520 | okeymap = current_buffer->keymap; | |
3521 | ||
d0d6b7c5 JB |
3522 | sentinel = p->sentinel; |
3523 | if (NILP (sentinel)) | |
3524 | return; | |
3525 | ||
3526 | /* Zilch the sentinel while it's running, to avoid recursive invocations; | |
3527 | assure that it gets restored no matter how the sentinel exits. */ | |
3528 | p->sentinel = Qnil; | |
3529 | record_unwind_protect (exec_sentinel_unwind, Fcons (proc, sentinel)); | |
3530 | /* Inhibit quit so that random quits don't screw up a running filter. */ | |
3531 | specbind (Qinhibit_quit, Qt); | |
6545aada | 3532 | specbind (Qlast_nonmenu_event, Qt); |
3b9a3dfa | 3533 | |
7074fde6 | 3534 | running_asynch_code = 1; |
3b9a3dfa RS |
3535 | internal_condition_case_1 (read_process_output_call, |
3536 | Fcons (sentinel, | |
3537 | Fcons (proc, Fcons (reason, Qnil))), | |
3538 | !NILP (Vdebug_on_error) ? Qnil : Qerror, | |
3539 | exec_sentinel_error_handler); | |
7074fde6 FP |
3540 | running_asynch_code = 0; |
3541 | restore_match_data (); | |
8fb3cf64 KH |
3542 | |
3543 | Vdeactivate_mark = odeactivate; | |
7973cfa8 | 3544 | #if 0 |
dfc21838 RS |
3545 | if (! EQ (Fcurrent_buffer (), obuffer) |
3546 | || ! EQ (current_buffer->keymap, okeymap)) | |
7973cfa8 | 3547 | #endif |
927e08be RS |
3548 | /* But do it only if the caller is actually going to read events. |
3549 | Otherwise there's no need to make him wake up, and it could | |
3550 | cause trouble (for example it would make Fsit_for return). */ | |
3551 | if (waiting_for_user_input_p == -1) | |
3552 | record_asynch_buffer_change (); | |
8fb3cf64 | 3553 | |
2ea6d561 | 3554 | unbind_to (count, Qnil); |
d0d6b7c5 JB |
3555 | } |
3556 | ||
3557 | /* Report all recent events of a change in process status | |
3558 | (either run the sentinel or output a message). | |
3559 | This is done while Emacs is waiting for keyboard input. */ | |
3560 | ||
3561 | status_notify () | |
3562 | { | |
3563 | register Lisp_Object proc, buffer; | |
2e4149a8 | 3564 | Lisp_Object tail, msg; |
d0d6b7c5 JB |
3565 | struct gcpro gcpro1, gcpro2; |
3566 | ||
2e4149a8 KH |
3567 | tail = Qnil; |
3568 | msg = Qnil; | |
d0d6b7c5 JB |
3569 | /* We need to gcpro tail; if read_process_output calls a filter |
3570 | which deletes a process and removes the cons to which tail points | |
3571 | from Vprocess_alist, and then causes a GC, tail is an unprotected | |
3572 | reference. */ | |
3573 | GCPRO2 (tail, msg); | |
3574 | ||
30623085 RS |
3575 | /* Set this now, so that if new processes are created by sentinels |
3576 | that we run, we get called again to handle their status changes. */ | |
3577 | update_tick = process_tick; | |
3578 | ||
3579 | for (tail = Vprocess_alist; !NILP (tail); tail = Fcdr (tail)) | |
d0d6b7c5 | 3580 | { |
30623085 RS |
3581 | Lisp_Object symbol; |
3582 | register struct Lisp_Process *p; | |
3583 | ||
3584 | proc = Fcdr (Fcar (tail)); | |
3585 | p = XPROCESS (proc); | |
3586 | ||
3587 | if (XINT (p->tick) != XINT (p->update_tick)) | |
d0d6b7c5 | 3588 | { |
30623085 | 3589 | XSETINT (p->update_tick, XINT (p->tick)); |
d0d6b7c5 | 3590 | |
30623085 RS |
3591 | /* If process is still active, read any output that remains. */ |
3592 | if (XINT (p->infd) >= 0) | |
3593 | while (! EQ (p->filter, Qt) | |
3594 | && read_process_output (proc, XINT (p->infd)) > 0); | |
d0d6b7c5 | 3595 | |
30623085 | 3596 | buffer = p->buffer; |
d0d6b7c5 | 3597 | |
30623085 RS |
3598 | /* Get the text to use for the message. */ |
3599 | if (!NILP (p->raw_status_low)) | |
3600 | update_status (p); | |
3601 | msg = status_message (p->status); | |
d0d6b7c5 | 3602 | |
30623085 RS |
3603 | /* If process is terminated, deactivate it or delete it. */ |
3604 | symbol = p->status; | |
3605 | if (CONSP (p->status)) | |
3606 | symbol = XCONS (p->status)->car; | |
d0d6b7c5 | 3607 | |
30623085 RS |
3608 | if (EQ (symbol, Qsignal) || EQ (symbol, Qexit) |
3609 | || EQ (symbol, Qclosed)) | |
3610 | { | |
3611 | if (delete_exited_processes) | |
3612 | remove_process (proc); | |
3613 | else | |
3614 | deactivate_process (proc); | |
3615 | } | |
d0d6b7c5 | 3616 | |
30623085 RS |
3617 | /* Now output the message suitably. */ |
3618 | if (!NILP (p->sentinel)) | |
3619 | exec_sentinel (proc, msg); | |
3620 | /* Don't bother with a message in the buffer | |
3621 | when a process becomes runnable. */ | |
3622 | else if (!EQ (symbol, Qrun) && !NILP (buffer)) | |
3623 | { | |
3624 | Lisp_Object ro, tem; | |
3625 | struct buffer *old = current_buffer; | |
3626 | int opoint; | |
2e4149a8 | 3627 | |
30623085 | 3628 | ro = XBUFFER (buffer)->read_only; |
d0d6b7c5 | 3629 | |
30623085 RS |
3630 | /* Avoid error if buffer is deleted |
3631 | (probably that's why the process is dead, too) */ | |
3632 | if (NILP (XBUFFER (buffer)->name)) | |
3633 | continue; | |
3634 | Fset_buffer (buffer); | |
6ec8bbd2 | 3635 | opoint = PT; |
30623085 RS |
3636 | /* Insert new output into buffer |
3637 | at the current end-of-output marker, | |
3638 | thus preserving logical ordering of input and output. */ | |
3639 | if (XMARKER (p->mark)->buffer) | |
3640 | SET_PT (marker_position (p->mark)); | |
3641 | else | |
3642 | SET_PT (ZV); | |
6ec8bbd2 | 3643 | if (PT <= opoint) |
30623085 RS |
3644 | opoint += XSTRING (msg)->size + XSTRING (p->name)->size + 10; |
3645 | ||
3646 | tem = current_buffer->read_only; | |
3647 | current_buffer->read_only = Qnil; | |
3648 | insert_string ("\nProcess "); | |
3649 | Finsert (1, &p->name); | |
3650 | insert_string (" "); | |
3651 | Finsert (1, &msg); | |
3652 | current_buffer->read_only = tem; | |
6ec8bbd2 | 3653 | Fset_marker (p->mark, make_number (PT), p->buffer); |
30623085 RS |
3654 | |
3655 | SET_PT (opoint); | |
3656 | set_buffer_internal (old); | |
d0d6b7c5 | 3657 | } |
30623085 RS |
3658 | } |
3659 | } /* end for */ | |
d0d6b7c5 JB |
3660 | |
3661 | update_mode_lines++; /* in case buffers use %s in mode-line-format */ | |
3662 | redisplay_preserve_echo_area (); | |
3663 | ||
d0d6b7c5 JB |
3664 | UNGCPRO; |
3665 | } | |
3666 | \f | |
a69281ff RS |
3667 | /* The first time this is called, assume keyboard input comes from DESC |
3668 | instead of from where we used to expect it. | |
3669 | Subsequent calls mean assume input keyboard can come from DESC | |
3670 | in addition to other places. */ | |
3671 | ||
3672 | static int add_keyboard_wait_descriptor_called_flag; | |
3673 | ||
3674 | void | |
3675 | add_keyboard_wait_descriptor (desc) | |
3676 | int desc; | |
3677 | { | |
3678 | if (! add_keyboard_wait_descriptor_called_flag) | |
3679 | FD_CLR (0, &input_wait_mask); | |
3680 | add_keyboard_wait_descriptor_called_flag = 1; | |
3681 | FD_SET (desc, &input_wait_mask); | |
3682 | if (desc > max_keyboard_desc) | |
3683 | max_keyboard_desc = desc; | |
3684 | } | |
3685 | ||
3686 | /* From now on, do not expect DESC to give keyboard input. */ | |
3687 | ||
3688 | void | |
3689 | delete_keyboard_wait_descriptor (desc) | |
3690 | int desc; | |
3691 | { | |
3692 | int fd; | |
3693 | int lim = max_keyboard_desc; | |
3694 | ||
3695 | FD_CLR (desc, &input_wait_mask); | |
3696 | ||
3697 | if (desc == max_keyboard_desc) | |
3698 | for (fd = 0; fd < lim; fd++) | |
3699 | if (FD_ISSET (fd, &input_wait_mask) | |
3700 | && !FD_ISSET (fd, &non_keyboard_wait_mask)) | |
3701 | max_keyboard_desc = fd; | |
3702 | } | |
3703 | ||
3704 | /* Return nonzero if *MASK has a bit set | |
3705 | that corresponds to one of the keyboard input descriptors. */ | |
3706 | ||
3707 | int | |
3708 | keyboard_bit_set (mask) | |
3709 | SELECT_TYPE *mask; | |
3710 | { | |
3711 | int fd; | |
3712 | ||
ee8e09af | 3713 | for (fd = 0; fd <= max_keyboard_desc; fd++) |
a69281ff RS |
3714 | if (FD_ISSET (fd, mask) && FD_ISSET (fd, &input_wait_mask) |
3715 | && !FD_ISSET (fd, &non_keyboard_wait_mask)) | |
3716 | return 1; | |
3717 | ||
3718 | return 0; | |
3719 | } | |
3720 | \f | |
d0d6b7c5 JB |
3721 | init_process () |
3722 | { | |
3723 | register int i; | |
3724 | ||
3725 | #ifdef SIGCHLD | |
3726 | #ifndef CANNOT_DUMP | |
3727 | if (! noninteractive || initialized) | |
3728 | #endif | |
3729 | signal (SIGCHLD, sigchld_handler); | |
3730 | #endif | |
3731 | ||
3732 | FD_ZERO (&input_wait_mask); | |
a69281ff | 3733 | FD_ZERO (&non_keyboard_wait_mask); |
7d0e672e | 3734 | max_process_desc = 0; |
dd2281ae | 3735 | |
a69281ff | 3736 | FD_SET (0, &input_wait_mask); |
dd2281ae | 3737 | |
d0d6b7c5 JB |
3738 | Vprocess_alist = Qnil; |
3739 | for (i = 0; i < MAXDESC; i++) | |
3740 | { | |
3741 | chan_process[i] = Qnil; | |
3742 | proc_buffered_char[i] = -1; | |
3743 | } | |
3744 | } | |
312c9964 | 3745 | |
d0d6b7c5 JB |
3746 | syms_of_process () |
3747 | { | |
d0d6b7c5 JB |
3748 | Qprocessp = intern ("processp"); |
3749 | staticpro (&Qprocessp); | |
3750 | Qrun = intern ("run"); | |
3751 | staticpro (&Qrun); | |
3752 | Qstop = intern ("stop"); | |
3753 | staticpro (&Qstop); | |
3754 | Qsignal = intern ("signal"); | |
3755 | staticpro (&Qsignal); | |
3756 | ||
3757 | /* Qexit is already staticpro'd by syms_of_eval; don't staticpro it | |
3758 | here again. | |
3759 | ||
3760 | Qexit = intern ("exit"); | |
3761 | staticpro (&Qexit); */ | |
3762 | ||
3763 | Qopen = intern ("open"); | |
3764 | staticpro (&Qopen); | |
3765 | Qclosed = intern ("closed"); | |
3766 | staticpro (&Qclosed); | |
3767 | ||
6545aada RS |
3768 | Qlast_nonmenu_event = intern ("last-nonmenu-event"); |
3769 | staticpro (&Qlast_nonmenu_event); | |
3770 | ||
d0d6b7c5 JB |
3771 | staticpro (&Vprocess_alist); |
3772 | ||
3773 | DEFVAR_BOOL ("delete-exited-processes", &delete_exited_processes, | |
3774 | "*Non-nil means delete processes immediately when they exit.\n\ | |
3775 | nil means don't delete them until `list-processes' is run."); | |
3776 | ||
3777 | delete_exited_processes = 1; | |
3778 | ||
3779 | DEFVAR_LISP ("process-connection-type", &Vprocess_connection_type, | |
3780 | "Control type of device used to communicate with subprocesses.\n\ | |
e333e864 RS |
3781 | Values are nil to use a pipe, or t or `pty' to use a pty.\n\ |
3782 | The value has no effect if the system has no ptys or if all ptys are busy:\n\ | |
3783 | then a pipe is used in any case.\n\ | |
3784 | The value takes effect when `start-process' is called."); | |
d0d6b7c5 JB |
3785 | Vprocess_connection_type = Qt; |
3786 | ||
3787 | defsubr (&Sprocessp); | |
3788 | defsubr (&Sget_process); | |
3789 | defsubr (&Sget_buffer_process); | |
3790 | defsubr (&Sdelete_process); | |
3791 | defsubr (&Sprocess_status); | |
3792 | defsubr (&Sprocess_exit_status); | |
3793 | defsubr (&Sprocess_id); | |
3794 | defsubr (&Sprocess_name); | |
3b9a3dfa | 3795 | defsubr (&Sprocess_tty_name); |
d0d6b7c5 JB |
3796 | defsubr (&Sprocess_command); |
3797 | defsubr (&Sset_process_buffer); | |
3798 | defsubr (&Sprocess_buffer); | |
3799 | defsubr (&Sprocess_mark); | |
3800 | defsubr (&Sset_process_filter); | |
3801 | defsubr (&Sprocess_filter); | |
3802 | defsubr (&Sset_process_sentinel); | |
3803 | defsubr (&Sprocess_sentinel); | |
de282a05 | 3804 | defsubr (&Sset_process_window_size); |
d0d6b7c5 | 3805 | defsubr (&Sprocess_kill_without_query); |
de282a05 | 3806 | defsubr (&Sprocess_contact); |
d0d6b7c5 JB |
3807 | defsubr (&Slist_processes); |
3808 | defsubr (&Sprocess_list); | |
3809 | defsubr (&Sstart_process); | |
3810 | #ifdef HAVE_SOCKETS | |
3811 | defsubr (&Sopen_network_stream); | |
3812 | #endif /* HAVE_SOCKETS */ | |
3813 | defsubr (&Saccept_process_output); | |
3814 | defsubr (&Sprocess_send_region); | |
3815 | defsubr (&Sprocess_send_string); | |
3816 | defsubr (&Sinterrupt_process); | |
3817 | defsubr (&Skill_process); | |
3818 | defsubr (&Squit_process); | |
3819 | defsubr (&Sstop_process); | |
3820 | defsubr (&Scontinue_process); | |
3821 | defsubr (&Sprocess_send_eof); | |
3822 | defsubr (&Ssignal_process); | |
3823 | defsubr (&Swaiting_for_user_input_p); | |
3824 | /* defsubr (&Sprocess_connection); */ | |
3825 | } | |
3826 | ||
6720a7fb JB |
3827 | \f |
3828 | #else /* not subprocesses */ | |
3829 | ||
3830 | #include <sys/types.h> | |
3831 | #include <errno.h> | |
3832 | ||
3833 | #include "lisp.h" | |
3834 | #include "systime.h" | |
3835 | #include "termopts.h" | |
81afb6d1 | 3836 | #include "sysselect.h" |
6720a7fb | 3837 | |
ff11dfa1 | 3838 | extern int frame_garbaged; |
6720a7fb | 3839 | |
f694e5d2 KH |
3840 | extern EMACS_TIME timer_check (); |
3841 | extern int timers_run; | |
6720a7fb JB |
3842 | |
3843 | /* As described above, except assuming that there are no subprocesses: | |
3844 | ||
3845 | Wait for timeout to elapse and/or keyboard input to be available. | |
3846 | ||
3847 | time_limit is: | |
3848 | timeout in seconds, or | |
3849 | zero for no limit, or | |
3850 | -1 means gobble data immediately available but don't wait for any. | |
3851 | ||
f76475ad | 3852 | read_kbd is a Lisp_Object: |
6720a7fb JB |
3853 | 0 to ignore keyboard input, or |
3854 | 1 to return when input is available, or | |
3855 | -1 means caller will actually read the input, so don't throw to | |
3856 | the quit handler. | |
0a65b032 RS |
3857 | a cons cell, meaning wait until its car is non-nil |
3858 | (and gobble terminal input into the buffer if any arrives), or | |
6720a7fb JB |
3859 | We know that read_kbd will never be a Lisp_Process, since |
3860 | `subprocesses' isn't defined. | |
3861 | ||
3862 | do_display != 0 means redisplay should be done to show subprocess | |
5164ee8e | 3863 | output that arrives. |
6720a7fb | 3864 | |
eb8c3be9 | 3865 | Return true iff we received input from any process. */ |
6720a7fb JB |
3866 | |
3867 | int | |
3868 | wait_reading_process_input (time_limit, microsecs, read_kbd, do_display) | |
f76475ad JB |
3869 | int time_limit, microsecs; |
3870 | Lisp_Object read_kbd; | |
3871 | int do_display; | |
6720a7fb | 3872 | { |
f694e5d2 | 3873 | EMACS_TIME end_time, timeout; |
8db121c4 | 3874 | SELECT_TYPE waitchannels; |
f694e5d2 | 3875 | int xerrno; |
0a65b032 RS |
3876 | Lisp_Object *wait_for_cell = 0; |
3877 | ||
3878 | /* If waiting for non-nil in a cell, record where. */ | |
3879 | if (CONSP (read_kbd)) | |
3880 | { | |
3881 | wait_for_cell = &XCONS (read_kbd)->car; | |
3882 | XSETFASTINT (read_kbd, 0); | |
3883 | } | |
6720a7fb JB |
3884 | |
3885 | /* What does time_limit really mean? */ | |
3886 | if (time_limit || microsecs) | |
3887 | { | |
6720a7fb JB |
3888 | if (time_limit == -1) |
3889 | /* In fact, it's zero. */ | |
3890 | EMACS_SET_SECS_USECS (timeout, 0, 0); | |
3891 | else | |
3892 | EMACS_SET_SECS_USECS (timeout, time_limit, microsecs); | |
3893 | ||
3894 | /* How far in the future is that? */ | |
3895 | EMACS_GET_TIME (end_time); | |
3896 | EMACS_ADD_TIME (end_time, end_time, timeout); | |
3897 | } | |
3898 | else | |
3899 | /* It's infinite. */ | |
f694e5d2 | 3900 | EMACS_SET_SECS_USECS (timeout, 100000, 0); |
6720a7fb JB |
3901 | |
3902 | /* Turn off periodic alarms (in case they are in use) | |
3903 | because the select emulator uses alarms. */ | |
3904 | stop_polling (); | |
3905 | ||
3906 | for (;;) | |
3907 | { | |
3908 | int nfds; | |
bae8d137 | 3909 | int timeout_reduced_for_timers = 0; |
6720a7fb | 3910 | |
6720a7fb JB |
3911 | /* If calling from keyboard input, do not quit |
3912 | since we want to return C-g as an input character. | |
3913 | Otherwise, do pending quit if requested. */ | |
f76475ad | 3914 | if (XINT (read_kbd) >= 0) |
6720a7fb JB |
3915 | QUIT; |
3916 | ||
0a65b032 RS |
3917 | /* Exit now if the cell we're waiting for became non-nil. */ |
3918 | if (wait_for_cell && ! NILP (*wait_for_cell)) | |
3919 | break; | |
3920 | ||
bae8d137 RS |
3921 | /* Compute time from now till when time limit is up */ |
3922 | /* Exit if already run out */ | |
f694e5d2 | 3923 | if (time_limit > 0 || microsecs) |
6720a7fb | 3924 | { |
f694e5d2 KH |
3925 | EMACS_GET_TIME (timeout); |
3926 | EMACS_SUB_TIME (timeout, end_time, timeout); | |
3927 | if (EMACS_TIME_NEG_P (timeout)) | |
6720a7fb JB |
3928 | break; |
3929 | } | |
3930 | ||
bae8d137 RS |
3931 | /* If our caller will not immediately handle keyboard events, |
3932 | run timer events directly. | |
3933 | (Callers that will immediately read keyboard events | |
3934 | call timer_delay on their own.) */ | |
f854a00b | 3935 | if (! wait_for_cell) |
bae8d137 RS |
3936 | { |
3937 | EMACS_TIME timer_delay; | |
0a65b032 RS |
3938 | int old_timers_run; |
3939 | ||
3940 | retry: | |
3941 | old_timers_run = timers_run; | |
bae8d137 RS |
3942 | timer_delay = timer_check (1); |
3943 | if (timers_run != old_timers_run && do_display) | |
0a65b032 RS |
3944 | { |
3945 | redisplay_preserve_echo_area (); | |
3946 | /* We must retry, since a timer may have requeued itself | |
3947 | and that could alter the time delay. */ | |
3948 | goto retry; | |
3949 | } | |
3950 | ||
f694e5d2 | 3951 | if (! EMACS_TIME_NEG_P (timer_delay) && time_limit != -1) |
bae8d137 RS |
3952 | { |
3953 | EMACS_TIME difference; | |
f694e5d2 | 3954 | EMACS_SUB_TIME (difference, timer_delay, timeout); |
bae8d137 RS |
3955 | if (EMACS_TIME_NEG_P (difference)) |
3956 | { | |
f694e5d2 | 3957 | timeout = timer_delay; |
bae8d137 RS |
3958 | timeout_reduced_for_timers = 1; |
3959 | } | |
3960 | } | |
3961 | } | |
3962 | ||
6720a7fb JB |
3963 | /* Cause C-g and alarm signals to take immediate action, |
3964 | and cause input available signals to zero out timeout. */ | |
f76475ad | 3965 | if (XINT (read_kbd) < 0) |
6720a7fb JB |
3966 | set_waiting_for_input (&timeout); |
3967 | ||
0a65b032 RS |
3968 | /* Wait till there is something to do. */ |
3969 | ||
3970 | if (! XINT (read_kbd) && wait_for_cell == 0) | |
3971 | FD_ZERO (&waitchannels); | |
3972 | else | |
3973 | FD_SET (0, &waitchannels); | |
3974 | ||
ff11dfa1 | 3975 | /* If a frame has been newly mapped and needs updating, |
6720a7fb | 3976 | reprocess its display stuff. */ |
5164ee8e | 3977 | if (frame_garbaged && do_display) |
0a65b032 RS |
3978 | { |
3979 | clear_waiting_for_input (); | |
3980 | redisplay_preserve_echo_area (); | |
3981 | if (XINT (read_kbd) < 0) | |
3982 | set_waiting_for_input (&timeout); | |
3983 | } | |
6720a7fb | 3984 | |
1861b214 RS |
3985 | if (XINT (read_kbd) && detect_input_pending ()) |
3986 | { | |
3987 | nfds = 0; | |
3988 | FD_ZERO (&waitchannels); | |
3989 | } | |
3990 | else | |
3991 | nfds = select (1, &waitchannels, (SELECT_TYPE *)0, (SELECT_TYPE *)0, | |
3992 | &timeout); | |
f694e5d2 KH |
3993 | |
3994 | xerrno = errno; | |
6720a7fb JB |
3995 | |
3996 | /* Make C-g and alarm signals set flags again */ | |
3997 | clear_waiting_for_input (); | |
3998 | ||
3999 | /* If we woke up due to SIGWINCH, actually change size now. */ | |
4000 | do_pending_window_change (); | |
4001 | ||
f694e5d2 KH |
4002 | if (time_limit && nfds == 0 && ! timeout_reduced_for_timers) |
4003 | /* We waited the full specified time, so return now. */ | |
4004 | break; | |
4005 | ||
6720a7fb JB |
4006 | if (nfds == -1) |
4007 | { | |
4008 | /* If the system call was interrupted, then go around the | |
4009 | loop again. */ | |
f694e5d2 | 4010 | if (xerrno == EINTR) |
8db121c4 | 4011 | FD_ZERO (&waitchannels); |
f694e5d2 KH |
4012 | else |
4013 | error ("select error: %s", strerror (xerrno)); | |
6720a7fb JB |
4014 | } |
4015 | #ifdef sun | |
4016 | else if (nfds > 0 && (waitchannels & 1) && interrupt_input) | |
4017 | /* System sometimes fails to deliver SIGIO. */ | |
4018 | kill (getpid (), SIGIO); | |
4019 | #endif | |
7324d660 | 4020 | #ifdef SIGIO |
f76475ad | 4021 | if (XINT (read_kbd) && interrupt_input && (waitchannels & 1)) |
e643c5be | 4022 | kill (getpid (), SIGIO); |
7324d660 | 4023 | #endif |
6720a7fb | 4024 | |
f694e5d2 KH |
4025 | /* Check for keyboard input */ |
4026 | ||
f854a00b | 4027 | if ((XINT (read_kbd) != 0) |
f694e5d2 KH |
4028 | && detect_input_pending_run_timers (do_display)) |
4029 | { | |
4030 | swallow_events (do_display); | |
4031 | if (detect_input_pending_run_timers (do_display)) | |
4032 | break; | |
4033 | } | |
0a65b032 | 4034 | |
f854a00b RS |
4035 | /* If wait_for_cell. check for keyboard input |
4036 | but don't run any timers. | |
4037 | ??? (It seems wrong to me to check for keyboard | |
4038 | input at all when wait_for_cell, but the code | |
4039 | has been this way since July 1994. | |
4040 | Try changing this after version 19.31.) */ | |
4041 | if (wait_for_cell | |
4042 | && detect_input_pending ()) | |
4043 | { | |
4044 | swallow_events (do_display); | |
4045 | if (detect_input_pending ()) | |
4046 | break; | |
4047 | } | |
4048 | ||
0a65b032 RS |
4049 | /* Exit now if the cell we're waiting for became non-nil. */ |
4050 | if (wait_for_cell && ! NILP (*wait_for_cell)) | |
4051 | break; | |
6720a7fb JB |
4052 | } |
4053 | ||
a87b802f JB |
4054 | start_polling (); |
4055 | ||
6720a7fb JB |
4056 | return 0; |
4057 | } | |
4058 | ||
4059 | ||
4060 | DEFUN ("get-buffer-process", Fget_buffer_process, Sget_buffer_process, 1, 1, 0, | |
51ab806a | 4061 | /* Don't confuse make-docfile by having two doc strings for this function. |
312c9964 RS |
4062 | make-docfile does not pay attention to #if, for good reason! */ |
4063 | 0) | |
6720a7fb JB |
4064 | (name) |
4065 | register Lisp_Object name; | |
4066 | { | |
4067 | return Qnil; | |
4068 | } | |
4069 | ||
4070 | /* Kill all processes associated with `buffer'. | |
4071 | If `buffer' is nil, kill all processes. | |
4072 | Since we have no subprocesses, this does nothing. */ | |
4073 | ||
4074 | kill_buffer_processes (buffer) | |
4075 | Lisp_Object buffer; | |
4076 | { | |
4077 | } | |
4078 | ||
4079 | init_process () | |
4080 | { | |
4081 | } | |
4082 | ||
4083 | syms_of_process () | |
4084 | { | |
4085 | defsubr (&Sget_buffer_process); | |
4086 | } | |
4087 | ||
4088 | \f | |
4089 | #endif /* not subprocesses */ |