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d0d6b7c5 | 1 | /* Asynchronous subprocess control for GNU Emacs. |
03832893 RS |
2 | Copyright (C) 1985, 86, 87, 88, 93, 94, 95, 1996 |
3 | Free Software Foundation, Inc. | |
d0d6b7c5 JB |
4 | |
5 | This file is part of GNU Emacs. | |
6 | ||
7 | GNU Emacs is free software; you can redistribute it and/or modify | |
8 | it under the terms of the GNU General Public License as published by | |
1dc77cc3 | 9 | the Free Software Foundation; either version 2, or (at your option) |
d0d6b7c5 JB |
10 | any later version. |
11 | ||
12 | GNU Emacs is distributed in the hope that it will be useful, | |
13 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
15 | GNU General Public License for more details. | |
16 | ||
17 | You should have received a copy of the GNU General Public License | |
18 | along with GNU Emacs; see the file COPYING. If not, write to | |
3b7ad313 EN |
19 | the Free Software Foundation, Inc., 59 Temple Place - Suite 330, |
20 | Boston, MA 02111-1307, USA. */ | |
d0d6b7c5 JB |
21 | |
22 | ||
23 | #include <signal.h> | |
24 | ||
18160b98 | 25 | #include <config.h> |
d0d6b7c5 | 26 | |
6720a7fb JB |
27 | /* This file is split into two parts by the following preprocessor |
28 | conditional. The 'then' clause contains all of the support for | |
29 | asynchronous subprocesses. The 'else' clause contains stub | |
30 | versions of some of the asynchronous subprocess routines that are | |
31 | often called elsewhere in Emacs, so we don't have to #ifdef the | |
32 | sections that call them. */ | |
33 | ||
34 | \f | |
d0d6b7c5 | 35 | #ifdef subprocesses |
d0d6b7c5 JB |
36 | |
37 | #include <stdio.h> | |
38 | #include <errno.h> | |
39 | #include <setjmp.h> | |
40 | #include <sys/types.h> /* some typedefs are used in sys/file.h */ | |
41 | #include <sys/file.h> | |
42 | #include <sys/stat.h> | |
93b4f699 RS |
43 | #ifdef HAVE_UNISTD_H |
44 | #include <unistd.h> | |
45 | #endif | |
d0d6b7c5 | 46 | |
e98d950b RS |
47 | #ifdef WINDOWSNT |
48 | #include <stdlib.h> | |
49 | #include <fcntl.h> | |
50 | #endif /* not WINDOWSNT */ | |
51 | ||
d0d6b7c5 JB |
52 | #ifdef HAVE_SOCKETS /* TCP connection support, if kernel can do it */ |
53 | #include <sys/socket.h> | |
54 | #include <netdb.h> | |
55 | #include <netinet/in.h> | |
56 | #include <arpa/inet.h> | |
f2cfa9a6 RS |
57 | #ifdef NEED_NET_ERRNO_H |
58 | #include <net/errno.h> | |
59 | #endif /* NEED_NET_ERRNO_H */ | |
d0d6b7c5 JB |
60 | #endif /* HAVE_SOCKETS */ |
61 | ||
1d2c16fa RS |
62 | /* TERM is a poor-man's SLIP, used on Linux. */ |
63 | #ifdef TERM | |
64 | #include <client.h> | |
65 | #endif | |
66 | ||
cf32fea0 PR |
67 | /* On some systems, e.g. DGUX, inet_addr returns a 'struct in_addr'. */ |
68 | #ifdef HAVE_BROKEN_INET_ADDR | |
79967d5e RS |
69 | #define IN_ADDR struct in_addr |
70 | #define NUMERIC_ADDR_ERROR (numeric_addr.s_addr == -1) | |
71 | #else | |
72 | #define IN_ADDR unsigned long | |
73 | #define NUMERIC_ADDR_ERROR (numeric_addr == -1) | |
74 | #endif | |
75 | ||
d0d6b7c5 JB |
76 | #if defined(BSD) || defined(STRIDE) |
77 | #include <sys/ioctl.h> | |
0ad77c54 | 78 | #if !defined (O_NDELAY) && defined (HAVE_PTYS) && !defined(USG5) |
d0d6b7c5 JB |
79 | #include <fcntl.h> |
80 | #endif /* HAVE_PTYS and no O_NDELAY */ | |
81 | #endif /* BSD or STRIDE */ | |
d0d6b7c5 | 82 | |
99e3d726 RS |
83 | #ifdef BROKEN_O_NONBLOCK |
84 | #undef O_NONBLOCK | |
85 | #endif /* BROKEN_O_NONBLOCK */ | |
86 | ||
d0d6b7c5 JB |
87 | #ifdef NEED_BSDTTY |
88 | #include <bsdtty.h> | |
89 | #endif | |
90 | ||
d0d6b7c5 JB |
91 | #ifdef IRIS |
92 | #include <sys/sysmacros.h> /* for "minor" */ | |
93 | #endif /* not IRIS */ | |
94 | ||
95 | #include "systime.h" | |
36ebaafa | 96 | #include "systty.h" |
d0d6b7c5 JB |
97 | |
98 | #include "lisp.h" | |
99 | #include "window.h" | |
100 | #include "buffer.h" | |
101 | #include "process.h" | |
102 | #include "termhooks.h" | |
103 | #include "termopts.h" | |
104 | #include "commands.h" | |
1dc77cc3 | 105 | #include "frame.h" |
d0d6b7c5 | 106 | |
dd2281ae | 107 | Lisp_Object Qprocessp; |
d0d6b7c5 | 108 | Lisp_Object Qrun, Qstop, Qsignal, Qopen, Qclosed; |
6545aada | 109 | Lisp_Object Qlast_nonmenu_event; |
d0d6b7c5 JB |
110 | /* Qexit is declared and initialized in eval.c. */ |
111 | ||
112 | /* a process object is a network connection when its childp field is neither | |
113 | Qt nor Qnil but is instead a string (name of foreign host we | |
114 | are connected to + name of port we are connected to) */ | |
115 | ||
116 | #ifdef HAVE_SOCKETS | |
117 | static Lisp_Object stream_process; | |
118 | ||
b5b502d6 | 119 | #define NETCONN_P(p) (GC_STRINGP (XPROCESS (p)->childp)) |
d0d6b7c5 JB |
120 | #else |
121 | #define NETCONN_P(p) 0 | |
122 | #endif /* HAVE_SOCKETS */ | |
123 | ||
124 | /* Define first descriptor number available for subprocesses. */ | |
125 | #ifdef VMS | |
126 | #define FIRST_PROC_DESC 1 | |
127 | #else /* Not VMS */ | |
128 | #define FIRST_PROC_DESC 3 | |
129 | #endif | |
130 | ||
131 | /* Define SIGCHLD as an alias for SIGCLD. There are many conditionals | |
132 | testing SIGCHLD. */ | |
133 | ||
134 | #if !defined (SIGCHLD) && defined (SIGCLD) | |
135 | #define SIGCHLD SIGCLD | |
136 | #endif /* SIGCLD */ | |
137 | ||
138 | #include "syssignal.h" | |
139 | ||
889255b4 | 140 | #include "syswait.h" |
d0d6b7c5 | 141 | |
b062d1fe RM |
142 | extern int errno; |
143 | extern char *strerror (); | |
144 | #ifdef VMS | |
d0d6b7c5 | 145 | extern char *sys_errlist[]; |
b062d1fe | 146 | #endif |
d0d6b7c5 | 147 | |
5f0929a7 RS |
148 | #ifndef HAVE_H_ERRNO |
149 | extern int h_errno; | |
150 | #endif | |
151 | ||
a86928f7 | 152 | #ifndef SYS_SIGLIST_DECLARED |
d0d6b7c5 JB |
153 | #ifndef VMS |
154 | #ifndef BSD4_1 | |
e98d950b | 155 | #ifndef WINDOWSNT |
084fd64a | 156 | #ifndef LINUX |
d0d6b7c5 | 157 | extern char *sys_siglist[]; |
a0e4d3f3 RS |
158 | #endif /* not LINUX */ |
159 | #else /* BSD4_1 */ | |
d0d6b7c5 JB |
160 | char *sys_siglist[] = |
161 | { | |
162 | "bum signal!!", | |
163 | "hangup", | |
164 | "interrupt", | |
165 | "quit", | |
166 | "illegal instruction", | |
167 | "trace trap", | |
168 | "iot instruction", | |
169 | "emt instruction", | |
170 | "floating point exception", | |
171 | "kill", | |
172 | "bus error", | |
173 | "segmentation violation", | |
174 | "bad argument to system call", | |
175 | "write on a pipe with no one to read it", | |
176 | "alarm clock", | |
177 | "software termination signal from kill", | |
178 | "status signal", | |
179 | "sendable stop signal not from tty", | |
180 | "stop signal from tty", | |
181 | "continue a stopped process", | |
182 | "child status has changed", | |
183 | "background read attempted from control tty", | |
184 | "background write attempted from control tty", | |
185 | "input record available at control tty", | |
186 | "exceeded CPU time limit", | |
187 | "exceeded file size limit" | |
188 | }; | |
e98d950b | 189 | #endif /* not WINDOWSNT */ |
d0d6b7c5 JB |
190 | #endif |
191 | #endif /* VMS */ | |
a86928f7 | 192 | #endif /* ! SYS_SIGLIST_DECLARED */ |
d0d6b7c5 | 193 | |
d0d6b7c5 JB |
194 | /* t means use pty, nil means use a pipe, |
195 | maybe other values to come. */ | |
dd2281ae | 196 | static Lisp_Object Vprocess_connection_type; |
d0d6b7c5 JB |
197 | |
198 | #ifdef SKTPAIR | |
199 | #ifndef HAVE_SOCKETS | |
200 | #include <sys/socket.h> | |
201 | #endif | |
202 | #endif /* SKTPAIR */ | |
203 | ||
17d02632 KH |
204 | /* These next two vars are non-static since sysdep.c uses them in the |
205 | emulation of `select'. */ | |
d0d6b7c5 | 206 | /* Number of events of change of status of a process. */ |
17d02632 | 207 | int process_tick; |
d0d6b7c5 | 208 | /* Number of events for which the user or sentinel has been notified. */ |
17d02632 | 209 | int update_tick; |
d0d6b7c5 | 210 | |
5886acf9 | 211 | #include "sysselect.h" |
d0d6b7c5 | 212 | |
583dcae4 | 213 | /* If we support a window system, turn on the code to poll periodically |
44ade2e9 | 214 | to detect C-g. It isn't actually used when doing interrupt input. */ |
583dcae4 | 215 | #ifdef HAVE_WINDOW_SYSTEM |
44ade2e9 RS |
216 | #define POLL_FOR_INPUT |
217 | #endif | |
218 | ||
a69281ff | 219 | /* Mask of bits indicating the descriptors that we wait for input on. */ |
d0d6b7c5 | 220 | |
dd2281ae RS |
221 | static SELECT_TYPE input_wait_mask; |
222 | ||
a69281ff RS |
223 | /* Mask that excludes keyboard input descriptor (s). */ |
224 | ||
225 | static SELECT_TYPE non_keyboard_wait_mask; | |
226 | ||
7d0e672e RS |
227 | /* The largest descriptor currently in use for a process object. */ |
228 | static int max_process_desc; | |
229 | ||
a69281ff RS |
230 | /* The largest descriptor currently in use for keyboard input. */ |
231 | static int max_keyboard_desc; | |
d0d6b7c5 | 232 | |
dd2281ae RS |
233 | /* Nonzero means delete a process right away if it exits. */ |
234 | static int delete_exited_processes; | |
d0d6b7c5 JB |
235 | |
236 | /* Indexed by descriptor, gives the process (if any) for that descriptor */ | |
41f3aa98 | 237 | Lisp_Object chan_process[MAXDESC]; |
d0d6b7c5 JB |
238 | |
239 | /* Alist of elements (NAME . PROCESS) */ | |
41f3aa98 | 240 | Lisp_Object Vprocess_alist; |
d0d6b7c5 JB |
241 | |
242 | /* Buffered-ahead input char from process, indexed by channel. | |
243 | -1 means empty (no char is buffered). | |
244 | Used on sys V where the only way to tell if there is any | |
245 | output from the process is to read at least one char. | |
246 | Always -1 on systems that support FIONREAD. */ | |
247 | ||
e98d950b RS |
248 | /* Don't make static; need to access externally. */ |
249 | int proc_buffered_char[MAXDESC]; | |
dd2281ae RS |
250 | |
251 | static Lisp_Object get_process (); | |
93b4f699 | 252 | |
fb4c3627 RS |
253 | extern EMACS_TIME timer_check (); |
254 | ||
93b4f699 RS |
255 | /* Maximum number of bytes to send to a pty without an eof. */ |
256 | static int pty_max_bytes; | |
3b9a3dfa | 257 | |
875e6b94 KH |
258 | #ifdef HAVE_PTYS |
259 | /* The file name of the pty opened by allocate_pty. */ | |
3b9a3dfa RS |
260 | |
261 | static char pty_name[24]; | |
875e6b94 | 262 | #endif |
d0d6b7c5 JB |
263 | \f |
264 | /* Compute the Lisp form of the process status, p->status, from | |
265 | the numeric status that was returned by `wait'. */ | |
266 | ||
f9738840 JB |
267 | Lisp_Object status_convert (); |
268 | ||
d0d6b7c5 JB |
269 | update_status (p) |
270 | struct Lisp_Process *p; | |
271 | { | |
272 | union { int i; WAITTYPE wt; } u; | |
273 | u.i = XFASTINT (p->raw_status_low) + (XFASTINT (p->raw_status_high) << 16); | |
274 | p->status = status_convert (u.wt); | |
275 | p->raw_status_low = Qnil; | |
276 | p->raw_status_high = Qnil; | |
277 | } | |
278 | ||
91d10fa8 | 279 | /* Convert a process status word in Unix format to |
d0d6b7c5 JB |
280 | the list that we use internally. */ |
281 | ||
282 | Lisp_Object | |
283 | status_convert (w) | |
284 | WAITTYPE w; | |
285 | { | |
286 | if (WIFSTOPPED (w)) | |
287 | return Fcons (Qstop, Fcons (make_number (WSTOPSIG (w)), Qnil)); | |
288 | else if (WIFEXITED (w)) | |
289 | return Fcons (Qexit, Fcons (make_number (WRETCODE (w)), | |
290 | WCOREDUMP (w) ? Qt : Qnil)); | |
291 | else if (WIFSIGNALED (w)) | |
292 | return Fcons (Qsignal, Fcons (make_number (WTERMSIG (w)), | |
293 | WCOREDUMP (w) ? Qt : Qnil)); | |
294 | else | |
295 | return Qrun; | |
296 | } | |
297 | ||
298 | /* Given a status-list, extract the three pieces of information | |
299 | and store them individually through the three pointers. */ | |
300 | ||
301 | void | |
302 | decode_status (l, symbol, code, coredump) | |
303 | Lisp_Object l; | |
304 | Lisp_Object *symbol; | |
305 | int *code; | |
306 | int *coredump; | |
307 | { | |
308 | Lisp_Object tem; | |
309 | ||
bcd69aea | 310 | if (SYMBOLP (l)) |
d0d6b7c5 JB |
311 | { |
312 | *symbol = l; | |
313 | *code = 0; | |
314 | *coredump = 0; | |
315 | } | |
316 | else | |
317 | { | |
318 | *symbol = XCONS (l)->car; | |
319 | tem = XCONS (l)->cdr; | |
320 | *code = XFASTINT (XCONS (tem)->car); | |
f9738840 | 321 | tem = XCONS (tem)->cdr; |
d0d6b7c5 JB |
322 | *coredump = !NILP (tem); |
323 | } | |
324 | } | |
325 | ||
326 | /* Return a string describing a process status list. */ | |
327 | ||
328 | Lisp_Object | |
329 | status_message (status) | |
330 | Lisp_Object status; | |
331 | { | |
332 | Lisp_Object symbol; | |
333 | int code, coredump; | |
334 | Lisp_Object string, string2; | |
335 | ||
336 | decode_status (status, &symbol, &code, &coredump); | |
337 | ||
338 | if (EQ (symbol, Qsignal) || EQ (symbol, Qstop)) | |
339 | { | |
b97ad9ea RS |
340 | char *signame = 0; |
341 | if (code < NSIG) | |
342 | { | |
b0310da4 | 343 | #ifndef VMS |
ed0cae05 RS |
344 | /* Cast to suppress warning if the table has const char *. */ |
345 | signame = (char *) sys_siglist[code]; | |
b0310da4 | 346 | #else |
b97ad9ea | 347 | signame = sys_errlist[code]; |
b0310da4 | 348 | #endif |
b97ad9ea RS |
349 | } |
350 | if (signame == 0) | |
351 | signame = "unknown"; | |
352 | string = build_string (signame); | |
d0d6b7c5 JB |
353 | string2 = build_string (coredump ? " (core dumped)\n" : "\n"); |
354 | XSTRING (string)->data[0] = DOWNCASE (XSTRING (string)->data[0]); | |
355 | return concat2 (string, string2); | |
356 | } | |
357 | else if (EQ (symbol, Qexit)) | |
358 | { | |
359 | if (code == 0) | |
360 | return build_string ("finished\n"); | |
f2980264 | 361 | string = Fnumber_to_string (make_number (code)); |
d0d6b7c5 JB |
362 | string2 = build_string (coredump ? " (core dumped)\n" : "\n"); |
363 | return concat2 (build_string ("exited abnormally with code "), | |
364 | concat2 (string, string2)); | |
365 | } | |
366 | else | |
367 | return Fcopy_sequence (Fsymbol_name (symbol)); | |
368 | } | |
369 | \f | |
370 | #ifdef HAVE_PTYS | |
d0d6b7c5 | 371 | |
875e6b94 KH |
372 | /* Open an available pty, returning a file descriptor. |
373 | Return -1 on failure. | |
374 | The file name of the terminal corresponding to the pty | |
375 | is left in the variable pty_name. */ | |
376 | ||
d0d6b7c5 JB |
377 | int |
378 | allocate_pty () | |
379 | { | |
380 | struct stat stb; | |
381 | register c, i; | |
382 | int fd; | |
383 | ||
32676c08 JB |
384 | /* Some systems name their pseudoterminals so that there are gaps in |
385 | the usual sequence - for example, on HP9000/S700 systems, there | |
386 | are no pseudoterminals with names ending in 'f'. So we wait for | |
387 | three failures in a row before deciding that we've reached the | |
388 | end of the ptys. */ | |
389 | int failed_count = 0; | |
390 | ||
d0d6b7c5 JB |
391 | #ifdef PTY_ITERATION |
392 | PTY_ITERATION | |
393 | #else | |
394 | for (c = FIRST_PTY_LETTER; c <= 'z'; c++) | |
395 | for (i = 0; i < 16; i++) | |
396 | #endif | |
397 | { | |
398 | #ifdef PTY_NAME_SPRINTF | |
399 | PTY_NAME_SPRINTF | |
d0d6b7c5 JB |
400 | #else |
401 | sprintf (pty_name, "/dev/pty%c%x", c, i); | |
d0d6b7c5 JB |
402 | #endif /* no PTY_NAME_SPRINTF */ |
403 | ||
4d7c105e RS |
404 | #ifdef PTY_OPEN |
405 | PTY_OPEN; | |
406 | #else /* no PTY_OPEN */ | |
32676c08 JB |
407 | #ifdef IRIS |
408 | /* Unusual IRIS code */ | |
409 | *ptyv = open ("/dev/ptc", O_RDWR | O_NDELAY, 0); | |
410 | if (fd < 0) | |
411 | return -1; | |
412 | if (fstat (fd, &stb) < 0) | |
d0d6b7c5 | 413 | return -1; |
4d7c105e | 414 | #else /* not IRIS */ |
32676c08 JB |
415 | if (stat (pty_name, &stb) < 0) |
416 | { | |
417 | failed_count++; | |
418 | if (failed_count >= 3) | |
419 | return -1; | |
420 | } | |
421 | else | |
422 | failed_count = 0; | |
d0d6b7c5 JB |
423 | #ifdef O_NONBLOCK |
424 | fd = open (pty_name, O_RDWR | O_NONBLOCK, 0); | |
425 | #else | |
426 | fd = open (pty_name, O_RDWR | O_NDELAY, 0); | |
427 | #endif | |
4d7c105e RS |
428 | #endif /* not IRIS */ |
429 | #endif /* no PTY_OPEN */ | |
d0d6b7c5 JB |
430 | |
431 | if (fd >= 0) | |
432 | { | |
433 | /* check to make certain that both sides are available | |
434 | this avoids a nasty yet stupid bug in rlogins */ | |
435 | #ifdef PTY_TTY_NAME_SPRINTF | |
436 | PTY_TTY_NAME_SPRINTF | |
d0d6b7c5 JB |
437 | #else |
438 | sprintf (pty_name, "/dev/tty%c%x", c, i); | |
d0d6b7c5 JB |
439 | #endif /* no PTY_TTY_NAME_SPRINTF */ |
440 | #ifndef UNIPLUS | |
441 | if (access (pty_name, 6) != 0) | |
442 | { | |
443 | close (fd); | |
fad97cbe | 444 | #if !defined(IRIS) && !defined(__sgi) |
d0d6b7c5 JB |
445 | continue; |
446 | #else | |
447 | return -1; | |
448 | #endif /* IRIS */ | |
449 | } | |
450 | #endif /* not UNIPLUS */ | |
451 | setup_pty (fd); | |
452 | return fd; | |
453 | } | |
454 | } | |
455 | return -1; | |
456 | } | |
457 | #endif /* HAVE_PTYS */ | |
458 | \f | |
459 | Lisp_Object | |
460 | make_process (name) | |
461 | Lisp_Object name; | |
462 | { | |
23d6bb9c | 463 | struct Lisp_Vector *vec; |
d0d6b7c5 JB |
464 | register Lisp_Object val, tem, name1; |
465 | register struct Lisp_Process *p; | |
466 | char suffix[10]; | |
467 | register int i; | |
468 | ||
23d6bb9c KH |
469 | vec = allocate_vectorlike ((EMACS_INT) VECSIZE (struct Lisp_Process)); |
470 | for (i = 0; i < VECSIZE (struct Lisp_Process); i++) | |
471 | vec->contents[i] = Qnil; | |
472 | vec->size = VECSIZE (struct Lisp_Process); | |
473 | p = (struct Lisp_Process *)vec; | |
474 | ||
1d056e64 KH |
475 | XSETINT (p->infd, -1); |
476 | XSETINT (p->outfd, -1); | |
22719df2 KH |
477 | XSETFASTINT (p->pid, 0); |
478 | XSETFASTINT (p->tick, 0); | |
479 | XSETFASTINT (p->update_tick, 0); | |
d0d6b7c5 JB |
480 | p->raw_status_low = Qnil; |
481 | p->raw_status_high = Qnil; | |
482 | p->status = Qrun; | |
483 | p->mark = Fmake_marker (); | |
484 | ||
485 | /* If name is already in use, modify it until it is unused. */ | |
486 | ||
487 | name1 = name; | |
488 | for (i = 1; ; i++) | |
489 | { | |
490 | tem = Fget_process (name1); | |
491 | if (NILP (tem)) break; | |
492 | sprintf (suffix, "<%d>", i); | |
493 | name1 = concat2 (name, build_string (suffix)); | |
494 | } | |
495 | name = name1; | |
496 | p->name = name; | |
23d6bb9c | 497 | XSETPROCESS (val, p); |
d0d6b7c5 JB |
498 | Vprocess_alist = Fcons (Fcons (name, val), Vprocess_alist); |
499 | return val; | |
500 | } | |
501 | ||
502 | remove_process (proc) | |
503 | register Lisp_Object proc; | |
504 | { | |
505 | register Lisp_Object pair; | |
506 | ||
507 | pair = Frassq (proc, Vprocess_alist); | |
508 | Vprocess_alist = Fdelq (pair, Vprocess_alist); | |
509 | Fset_marker (XPROCESS (proc)->mark, Qnil, Qnil); | |
510 | ||
511 | deactivate_process (proc); | |
512 | } | |
513 | \f | |
514 | DEFUN ("processp", Fprocessp, Sprocessp, 1, 1, 0, | |
515 | "Return t if OBJECT is a process.") | |
4ee3e309 EN |
516 | (object) |
517 | Lisp_Object object; | |
d0d6b7c5 | 518 | { |
4ee3e309 | 519 | return PROCESSP (object) ? Qt : Qnil; |
d0d6b7c5 JB |
520 | } |
521 | ||
522 | DEFUN ("get-process", Fget_process, Sget_process, 1, 1, 0, | |
523 | "Return the process named NAME, or nil if there is none.") | |
524 | (name) | |
525 | register Lisp_Object name; | |
526 | { | |
bcd69aea | 527 | if (PROCESSP (name)) |
d0d6b7c5 JB |
528 | return name; |
529 | CHECK_STRING (name, 0); | |
530 | return Fcdr (Fassoc (name, Vprocess_alist)); | |
531 | } | |
532 | ||
533 | DEFUN ("get-buffer-process", Fget_buffer_process, Sget_buffer_process, 1, 1, 0, | |
534 | "Return the (or, a) process associated with BUFFER.\n\ | |
535 | BUFFER may be a buffer or the name of one.") | |
4ee3e309 EN |
536 | (buffer) |
537 | register Lisp_Object buffer; | |
d0d6b7c5 JB |
538 | { |
539 | register Lisp_Object buf, tail, proc; | |
540 | ||
4ee3e309 EN |
541 | if (NILP (buffer)) return Qnil; |
542 | buf = Fget_buffer (buffer); | |
d0d6b7c5 JB |
543 | if (NILP (buf)) return Qnil; |
544 | ||
545 | for (tail = Vprocess_alist; !NILP (tail); tail = Fcdr (tail)) | |
546 | { | |
547 | proc = Fcdr (Fcar (tail)); | |
bcd69aea | 548 | if (PROCESSP (proc) && EQ (XPROCESS (proc)->buffer, buf)) |
d0d6b7c5 JB |
549 | return proc; |
550 | } | |
551 | return Qnil; | |
552 | } | |
553 | ||
ebb9e16f JB |
554 | /* This is how commands for the user decode process arguments. It |
555 | accepts a process, a process name, a buffer, a buffer name, or nil. | |
556 | Buffers denote the first process in the buffer, and nil denotes the | |
557 | current buffer. */ | |
d0d6b7c5 | 558 | |
77b221b1 | 559 | static Lisp_Object |
d0d6b7c5 JB |
560 | get_process (name) |
561 | register Lisp_Object name; | |
562 | { | |
1619761d KH |
563 | register Lisp_Object proc, obj; |
564 | if (STRINGP (name)) | |
565 | { | |
566 | obj = Fget_process (name); | |
567 | if (NILP (obj)) | |
568 | obj = Fget_buffer (name); | |
569 | if (NILP (obj)) | |
570 | error ("Process %s does not exist", XSTRING (name)->data); | |
571 | } | |
572 | else if (NILP (name)) | |
573 | obj = Fcurrent_buffer (); | |
d0d6b7c5 | 574 | else |
1619761d KH |
575 | obj = name; |
576 | ||
577 | /* Now obj should be either a buffer object or a process object. | |
578 | */ | |
579 | if (BUFFERP (obj)) | |
d0d6b7c5 | 580 | { |
1619761d | 581 | proc = Fget_buffer_process (obj); |
d0d6b7c5 | 582 | if (NILP (proc)) |
1619761d | 583 | error ("Buffer %s has no process", XSTRING (XBUFFER (obj)->name)->data); |
d0d6b7c5 | 584 | } |
d0d6b7c5 | 585 | else |
1619761d KH |
586 | { |
587 | CHECK_PROCESS (obj, 0); | |
588 | proc = obj; | |
589 | } | |
590 | return proc; | |
d0d6b7c5 JB |
591 | } |
592 | ||
593 | DEFUN ("delete-process", Fdelete_process, Sdelete_process, 1, 1, 0, | |
594 | "Delete PROCESS: kill it and forget about it immediately.\n\ | |
ebb9e16f JB |
595 | PROCESS may be a process, a buffer, the name of a process or buffer, or\n\ |
596 | nil, indicating the current buffer's process.") | |
4ee3e309 EN |
597 | (process) |
598 | register Lisp_Object process; | |
d0d6b7c5 | 599 | { |
4ee3e309 EN |
600 | process = get_process (process); |
601 | XPROCESS (process)->raw_status_low = Qnil; | |
602 | XPROCESS (process)->raw_status_high = Qnil; | |
603 | if (NETCONN_P (process)) | |
d0d6b7c5 | 604 | { |
4ee3e309 EN |
605 | XPROCESS (process)->status = Fcons (Qexit, Fcons (make_number (0), Qnil)); |
606 | XSETINT (XPROCESS (process)->tick, ++process_tick); | |
d0d6b7c5 | 607 | } |
4ee3e309 | 608 | else if (XINT (XPROCESS (process)->infd) >= 0) |
d0d6b7c5 | 609 | { |
4ee3e309 | 610 | Fkill_process (process, Qnil); |
d0d6b7c5 | 611 | /* Do this now, since remove_process will make sigchld_handler do nothing. */ |
4ee3e309 | 612 | XPROCESS (process)->status |
d0d6b7c5 | 613 | = Fcons (Qsignal, Fcons (make_number (SIGKILL), Qnil)); |
4ee3e309 | 614 | XSETINT (XPROCESS (process)->tick, ++process_tick); |
d0d6b7c5 JB |
615 | status_notify (); |
616 | } | |
4ee3e309 | 617 | remove_process (process); |
d0d6b7c5 JB |
618 | return Qnil; |
619 | } | |
620 | \f | |
621 | DEFUN ("process-status", Fprocess_status, Sprocess_status, 1, 1, 0, | |
622 | "Return the status of PROCESS: a symbol, one of these:\n\ | |
623 | run -- for a process that is running.\n\ | |
624 | stop -- for a process stopped but continuable.\n\ | |
625 | exit -- for a process that has exited.\n\ | |
626 | signal -- for a process that has got a fatal signal.\n\ | |
627 | open -- for a network stream connection that is open.\n\ | |
628 | closed -- for a network stream connection that is closed.\n\ | |
ebb9e16f JB |
629 | nil -- if arg is a process name and no such process exists.\n\ |
630 | PROCESS may be a process, a buffer, the name of a process or buffer, or\n\ | |
631 | nil, indicating the current buffer's process.") | |
4ee3e309 EN |
632 | (process) |
633 | register Lisp_Object process; | |
d0d6b7c5 JB |
634 | { |
635 | register struct Lisp_Process *p; | |
636 | register Lisp_Object status; | |
343f4114 | 637 | |
4ee3e309 EN |
638 | if (STRINGP (process)) |
639 | process = Fget_process (process); | |
343f4114 | 640 | else |
4ee3e309 | 641 | process = get_process (process); |
343f4114 | 642 | |
4ee3e309 EN |
643 | if (NILP (process)) |
644 | return process; | |
343f4114 | 645 | |
4ee3e309 | 646 | p = XPROCESS (process); |
d0d6b7c5 JB |
647 | if (!NILP (p->raw_status_low)) |
648 | update_status (p); | |
649 | status = p->status; | |
bcd69aea | 650 | if (CONSP (status)) |
d0d6b7c5 | 651 | status = XCONS (status)->car; |
4ee3e309 | 652 | if (NETCONN_P (process)) |
d0d6b7c5 JB |
653 | { |
654 | if (EQ (status, Qrun)) | |
655 | status = Qopen; | |
656 | else if (EQ (status, Qexit)) | |
657 | status = Qclosed; | |
658 | } | |
659 | return status; | |
660 | } | |
661 | ||
662 | DEFUN ("process-exit-status", Fprocess_exit_status, Sprocess_exit_status, | |
663 | 1, 1, 0, | |
664 | "Return the exit status of PROCESS or the signal number that killed it.\n\ | |
665 | If PROCESS has not yet exited or died, return 0.") | |
4ee3e309 EN |
666 | (process) |
667 | register Lisp_Object process; | |
d0d6b7c5 | 668 | { |
4ee3e309 EN |
669 | CHECK_PROCESS (process, 0); |
670 | if (!NILP (XPROCESS (process)->raw_status_low)) | |
671 | update_status (XPROCESS (process)); | |
672 | if (CONSP (XPROCESS (process)->status)) | |
673 | return XCONS (XCONS (XPROCESS (process)->status)->cdr)->car; | |
d0d6b7c5 JB |
674 | return make_number (0); |
675 | } | |
676 | ||
677 | DEFUN ("process-id", Fprocess_id, Sprocess_id, 1, 1, 0, | |
678 | "Return the process id of PROCESS.\n\ | |
679 | This is the pid of the Unix process which PROCESS uses or talks to.\n\ | |
680 | For a network connection, this value is nil.") | |
4ee3e309 EN |
681 | (process) |
682 | register Lisp_Object process; | |
d0d6b7c5 | 683 | { |
4ee3e309 EN |
684 | CHECK_PROCESS (process, 0); |
685 | return XPROCESS (process)->pid; | |
d0d6b7c5 JB |
686 | } |
687 | ||
688 | DEFUN ("process-name", Fprocess_name, Sprocess_name, 1, 1, 0, | |
689 | "Return the name of PROCESS, as a string.\n\ | |
690 | This is the name of the program invoked in PROCESS,\n\ | |
691 | possibly modified to make it unique among process names.") | |
4ee3e309 EN |
692 | (process) |
693 | register Lisp_Object process; | |
d0d6b7c5 | 694 | { |
4ee3e309 EN |
695 | CHECK_PROCESS (process, 0); |
696 | return XPROCESS (process)->name; | |
d0d6b7c5 JB |
697 | } |
698 | ||
699 | DEFUN ("process-command", Fprocess_command, Sprocess_command, 1, 1, 0, | |
700 | "Return the command that was executed to start PROCESS.\n\ | |
701 | This is a list of strings, the first string being the program executed\n\ | |
702 | and the rest of the strings being the arguments given to it.\n\ | |
703 | For a non-child channel, this is nil.") | |
4ee3e309 EN |
704 | (process) |
705 | register Lisp_Object process; | |
d0d6b7c5 | 706 | { |
4ee3e309 EN |
707 | CHECK_PROCESS (process, 0); |
708 | return XPROCESS (process)->command; | |
d0d6b7c5 JB |
709 | } |
710 | ||
3b9a3dfa RS |
711 | DEFUN ("process-tty-name", Fprocess_tty_name, Sprocess_tty_name, 1, 1, 0, |
712 | "Return the name of the terminal PROCESS uses, or nil if none.\n\ | |
713 | This is the terminal that the process itself reads and writes on,\n\ | |
714 | not the name of the pty that Emacs uses to talk with that terminal.") | |
4ee3e309 EN |
715 | (process) |
716 | register Lisp_Object process; | |
3b9a3dfa | 717 | { |
4ee3e309 EN |
718 | CHECK_PROCESS (process, 0); |
719 | return XPROCESS (process)->tty_name; | |
3b9a3dfa RS |
720 | } |
721 | ||
d0d6b7c5 JB |
722 | DEFUN ("set-process-buffer", Fset_process_buffer, Sset_process_buffer, |
723 | 2, 2, 0, | |
724 | "Set buffer associated with PROCESS to BUFFER (a buffer, or nil).") | |
4ee3e309 EN |
725 | (process, buffer) |
726 | register Lisp_Object process, buffer; | |
d0d6b7c5 | 727 | { |
4ee3e309 | 728 | CHECK_PROCESS (process, 0); |
d0d6b7c5 JB |
729 | if (!NILP (buffer)) |
730 | CHECK_BUFFER (buffer, 1); | |
4ee3e309 | 731 | XPROCESS (process)->buffer = buffer; |
d0d6b7c5 JB |
732 | return buffer; |
733 | } | |
734 | ||
735 | DEFUN ("process-buffer", Fprocess_buffer, Sprocess_buffer, | |
736 | 1, 1, 0, | |
737 | "Return the buffer PROCESS is associated with.\n\ | |
738 | Output from PROCESS is inserted in this buffer\n\ | |
739 | unless PROCESS has a filter.") | |
4ee3e309 EN |
740 | (process) |
741 | register Lisp_Object process; | |
d0d6b7c5 | 742 | { |
4ee3e309 EN |
743 | CHECK_PROCESS (process, 0); |
744 | return XPROCESS (process)->buffer; | |
d0d6b7c5 JB |
745 | } |
746 | ||
747 | DEFUN ("process-mark", Fprocess_mark, Sprocess_mark, | |
748 | 1, 1, 0, | |
749 | "Return the marker for the end of the last output from PROCESS.") | |
4ee3e309 EN |
750 | (process) |
751 | register Lisp_Object process; | |
d0d6b7c5 | 752 | { |
4ee3e309 EN |
753 | CHECK_PROCESS (process, 0); |
754 | return XPROCESS (process)->mark; | |
d0d6b7c5 JB |
755 | } |
756 | ||
757 | DEFUN ("set-process-filter", Fset_process_filter, Sset_process_filter, | |
758 | 2, 2, 0, | |
759 | "Give PROCESS the filter function FILTER; nil means no filter.\n\ | |
20ddfff7 | 760 | t means stop accepting output from the process.\n\ |
d0d6b7c5 JB |
761 | When a process has a filter, each time it does output\n\ |
762 | the entire string of output is passed to the filter.\n\ | |
763 | The filter gets two arguments: the process and the string of output.\n\ | |
764 | If the process has a filter, its buffer is not used for output.") | |
4ee3e309 EN |
765 | (process, filter) |
766 | register Lisp_Object process, filter; | |
d0d6b7c5 | 767 | { |
4ee3e309 | 768 | CHECK_PROCESS (process, 0); |
20ddfff7 | 769 | if (EQ (filter, Qt)) |
a69281ff | 770 | { |
4ee3e309 EN |
771 | FD_CLR (XINT (XPROCESS (process)->infd), &input_wait_mask); |
772 | FD_CLR (XINT (XPROCESS (process)->infd), &non_keyboard_wait_mask); | |
a69281ff | 773 | } |
4ee3e309 | 774 | else if (EQ (XPROCESS (process)->filter, Qt)) |
a69281ff | 775 | { |
4ee3e309 EN |
776 | FD_SET (XINT (XPROCESS (process)->infd), &input_wait_mask); |
777 | FD_SET (XINT (XPROCESS (process)->infd), &non_keyboard_wait_mask); | |
a69281ff | 778 | } |
4ee3e309 | 779 | XPROCESS (process)->filter = filter; |
d0d6b7c5 JB |
780 | return filter; |
781 | } | |
782 | ||
783 | DEFUN ("process-filter", Fprocess_filter, Sprocess_filter, | |
784 | 1, 1, 0, | |
785 | "Returns the filter function of PROCESS; nil if none.\n\ | |
786 | See `set-process-filter' for more info on filter functions.") | |
4ee3e309 EN |
787 | (process) |
788 | register Lisp_Object process; | |
d0d6b7c5 | 789 | { |
4ee3e309 EN |
790 | CHECK_PROCESS (process, 0); |
791 | return XPROCESS (process)->filter; | |
d0d6b7c5 JB |
792 | } |
793 | ||
794 | DEFUN ("set-process-sentinel", Fset_process_sentinel, Sset_process_sentinel, | |
795 | 2, 2, 0, | |
796 | "Give PROCESS the sentinel SENTINEL; nil for none.\n\ | |
797 | The sentinel is called as a function when the process changes state.\n\ | |
798 | It gets two arguments: the process, and a string describing the change.") | |
4ee3e309 EN |
799 | (process, sentinel) |
800 | register Lisp_Object process, sentinel; | |
d0d6b7c5 | 801 | { |
4ee3e309 EN |
802 | CHECK_PROCESS (process, 0); |
803 | XPROCESS (process)->sentinel = sentinel; | |
d0d6b7c5 JB |
804 | return sentinel; |
805 | } | |
806 | ||
807 | DEFUN ("process-sentinel", Fprocess_sentinel, Sprocess_sentinel, | |
808 | 1, 1, 0, | |
809 | "Return the sentinel of PROCESS; nil if none.\n\ | |
810 | See `set-process-sentinel' for more info on sentinels.") | |
4ee3e309 EN |
811 | (process) |
812 | register Lisp_Object process; | |
d0d6b7c5 | 813 | { |
4ee3e309 EN |
814 | CHECK_PROCESS (process, 0); |
815 | return XPROCESS (process)->sentinel; | |
d0d6b7c5 JB |
816 | } |
817 | ||
396df322 RS |
818 | DEFUN ("set-process-window-size", Fset_process_window_size, |
819 | Sset_process_window_size, 3, 3, 0, | |
820 | "Tell PROCESS that it has logical window size HEIGHT and WIDTH.") | |
4ee3e309 EN |
821 | (process, height, width) |
822 | register Lisp_Object process, height, width; | |
396df322 | 823 | { |
4ee3e309 | 824 | CHECK_PROCESS (process, 0); |
396df322 RS |
825 | CHECK_NATNUM (height, 0); |
826 | CHECK_NATNUM (width, 0); | |
4ee3e309 | 827 | if (set_window_size (XINT (XPROCESS (process)->infd), |
396df322 RS |
828 | XINT (height), XINT(width)) <= 0) |
829 | return Qnil; | |
830 | else | |
831 | return Qt; | |
832 | } | |
833 | ||
d0d6b7c5 JB |
834 | DEFUN ("process-kill-without-query", Fprocess_kill_without_query, |
835 | Sprocess_kill_without_query, 1, 2, 0, | |
836 | "Say no query needed if PROCESS is running when Emacs is exited.\n\ | |
f2d2dbfe | 837 | Optional second argument if non-nil says to require a query.\n\ |
d0d6b7c5 | 838 | Value is t if a query was formerly required.") |
4ee3e309 EN |
839 | (process, value) |
840 | register Lisp_Object process, value; | |
d0d6b7c5 JB |
841 | { |
842 | Lisp_Object tem; | |
843 | ||
4ee3e309 EN |
844 | CHECK_PROCESS (process, 0); |
845 | tem = XPROCESS (process)->kill_without_query; | |
846 | XPROCESS (process)->kill_without_query = Fnull (value); | |
d0d6b7c5 JB |
847 | |
848 | return Fnull (tem); | |
849 | } | |
312c9964 RS |
850 | |
851 | #if 0 /* Turned off because we don't currently record this info | |
852 | in the process. Perhaps add it. */ | |
853 | DEFUN ("process-connection", Fprocess_connection, Sprocess_connection, 1, 1, 0, | |
854 | "Return the connection type of `PROCESS'.\n\ | |
855 | The value is `nil' for a pipe,\n\ | |
856 | `t' or `pty' for a pty, or `stream' for a socket connection.") | |
857 | (process) | |
858 | Lisp_Object process; | |
859 | { | |
860 | return XPROCESS (process)->type; | |
861 | } | |
862 | #endif | |
d0d6b7c5 JB |
863 | \f |
864 | Lisp_Object | |
865 | list_processes_1 () | |
866 | { | |
867 | register Lisp_Object tail, tem; | |
868 | Lisp_Object proc, minspace, tem1; | |
869 | register struct buffer *old = current_buffer; | |
870 | register struct Lisp_Process *p; | |
871 | register int state; | |
872 | char tembuf[80]; | |
873 | ||
22719df2 | 874 | XSETFASTINT (minspace, 1); |
d0d6b7c5 JB |
875 | |
876 | set_buffer_internal (XBUFFER (Vstandard_output)); | |
877 | Fbuffer_disable_undo (Vstandard_output); | |
878 | ||
879 | current_buffer->truncate_lines = Qt; | |
880 | ||
881 | write_string ("\ | |
a9fde32e KH |
882 | Proc Status Buffer Tty Command\n\ |
883 | ---- ------ ------ --- -------\n", -1); | |
d0d6b7c5 JB |
884 | |
885 | for (tail = Vprocess_alist; !NILP (tail); tail = Fcdr (tail)) | |
886 | { | |
887 | Lisp_Object symbol; | |
888 | ||
889 | proc = Fcdr (Fcar (tail)); | |
890 | p = XPROCESS (proc); | |
891 | if (NILP (p->childp)) | |
892 | continue; | |
893 | ||
894 | Finsert (1, &p->name); | |
895 | Findent_to (make_number (13), minspace); | |
896 | ||
897 | if (!NILP (p->raw_status_low)) | |
898 | update_status (p); | |
899 | symbol = p->status; | |
bcd69aea | 900 | if (CONSP (p->status)) |
d0d6b7c5 JB |
901 | symbol = XCONS (p->status)->car; |
902 | ||
903 | ||
904 | if (EQ (symbol, Qsignal)) | |
905 | { | |
906 | Lisp_Object tem; | |
907 | tem = Fcar (Fcdr (p->status)); | |
908 | #ifdef VMS | |
909 | if (XINT (tem) < NSIG) | |
b0310da4 | 910 | write_string (sys_errlist [XINT (tem)], -1); |
d0d6b7c5 JB |
911 | else |
912 | #endif | |
913 | Fprinc (symbol, Qnil); | |
914 | } | |
915 | else if (NETCONN_P (proc)) | |
916 | { | |
917 | if (EQ (symbol, Qrun)) | |
918 | write_string ("open", -1); | |
919 | else if (EQ (symbol, Qexit)) | |
920 | write_string ("closed", -1); | |
921 | else | |
922 | Fprinc (symbol, Qnil); | |
923 | } | |
924 | else | |
925 | Fprinc (symbol, Qnil); | |
926 | ||
927 | if (EQ (symbol, Qexit)) | |
928 | { | |
929 | Lisp_Object tem; | |
930 | tem = Fcar (Fcdr (p->status)); | |
931 | if (XFASTINT (tem)) | |
932 | { | |
3162bafa | 933 | sprintf (tembuf, " %d", (int) XFASTINT (tem)); |
d0d6b7c5 JB |
934 | write_string (tembuf, -1); |
935 | } | |
936 | } | |
937 | ||
938 | if (EQ (symbol, Qsignal) || EQ (symbol, Qexit)) | |
939 | remove_process (proc); | |
940 | ||
941 | Findent_to (make_number (22), minspace); | |
942 | if (NILP (p->buffer)) | |
943 | insert_string ("(none)"); | |
944 | else if (NILP (XBUFFER (p->buffer)->name)) | |
945 | insert_string ("(Killed)"); | |
946 | else | |
947 | Finsert (1, &XBUFFER (p->buffer)->name); | |
948 | ||
949 | Findent_to (make_number (37), minspace); | |
950 | ||
a9fde32e KH |
951 | if (STRINGP (p->tty_name)) |
952 | Finsert (1, &p->tty_name); | |
953 | else | |
954 | insert_string ("(none)"); | |
955 | ||
956 | Findent_to (make_number (49), minspace); | |
957 | ||
d0d6b7c5 JB |
958 | if (NETCONN_P (proc)) |
959 | { | |
960 | sprintf (tembuf, "(network stream connection to %s)\n", | |
961 | XSTRING (p->childp)->data); | |
962 | insert_string (tembuf); | |
963 | } | |
964 | else | |
965 | { | |
966 | tem = p->command; | |
967 | while (1) | |
968 | { | |
969 | tem1 = Fcar (tem); | |
970 | Finsert (1, &tem1); | |
971 | tem = Fcdr (tem); | |
972 | if (NILP (tem)) | |
973 | break; | |
974 | insert_string (" "); | |
975 | } | |
976 | insert_string ("\n"); | |
977 | } | |
978 | } | |
979 | return Qnil; | |
980 | } | |
981 | ||
982 | DEFUN ("list-processes", Flist_processes, Slist_processes, 0, 0, "", | |
983 | "Display a list of all processes.\n\ | |
984 | \(Any processes listed as Exited or Signaled are actually eliminated\n\ | |
985 | after the listing is made.)") | |
986 | () | |
987 | { | |
988 | internal_with_output_to_temp_buffer ("*Process List*", | |
989 | list_processes_1, Qnil); | |
990 | return Qnil; | |
991 | } | |
992 | ||
993 | DEFUN ("process-list", Fprocess_list, Sprocess_list, 0, 0, 0, | |
994 | "Return a list of all processes.") | |
995 | () | |
996 | { | |
997 | return Fmapcar (Qcdr, Vprocess_alist); | |
998 | } | |
999 | \f | |
b0310da4 JB |
1000 | /* Starting asynchronous inferior processes. */ |
1001 | ||
1002 | static Lisp_Object start_process_unwind (); | |
1003 | ||
d0d6b7c5 JB |
1004 | DEFUN ("start-process", Fstart_process, Sstart_process, 3, MANY, 0, |
1005 | "Start a program in a subprocess. Return the process object for it.\n\ | |
1006 | Args are NAME BUFFER PROGRAM &rest PROGRAM-ARGS\n\ | |
1007 | NAME is name for process. It is modified if necessary to make it unique.\n\ | |
1008 | BUFFER is the buffer or (buffer-name) to associate with the process.\n\ | |
1009 | Process output goes at end of that buffer, unless you specify\n\ | |
1010 | an output stream or filter function to handle the output.\n\ | |
1011 | BUFFER may be also nil, meaning that this process is not associated\n\ | |
1012 | with any buffer\n\ | |
1013 | Third arg is program file name. It is searched for as in the shell.\n\ | |
1014 | Remaining arguments are strings to give program as arguments.") | |
1015 | (nargs, args) | |
1016 | int nargs; | |
1017 | register Lisp_Object *args; | |
1018 | { | |
1e30af70 | 1019 | Lisp_Object buffer, name, program, proc, current_dir, tem; |
d0d6b7c5 JB |
1020 | #ifdef VMS |
1021 | register unsigned char *new_argv; | |
1022 | int len; | |
1023 | #else | |
1024 | register unsigned char **new_argv; | |
1025 | #endif | |
1026 | register int i; | |
b0310da4 | 1027 | int count = specpdl_ptr - specpdl; |
d0d6b7c5 JB |
1028 | |
1029 | buffer = args[1]; | |
1030 | if (!NILP (buffer)) | |
1031 | buffer = Fget_buffer_create (buffer); | |
1032 | ||
1e30af70 JB |
1033 | /* Make sure that the child will be able to chdir to the current |
1034 | buffer's current directory, or its unhandled equivalent. We | |
1035 | can't just have the child check for an error when it does the | |
1036 | chdir, since it's in a vfork. | |
1037 | ||
1038 | We have to GCPRO around this because Fexpand_file_name and | |
1039 | Funhandled_file_name_directory might call a file name handling | |
1040 | function. The argument list is protected by the caller, so all | |
1041 | we really have to worry about is buffer. */ | |
1042 | { | |
1043 | struct gcpro gcpro1, gcpro2; | |
1044 | ||
1045 | current_dir = current_buffer->directory; | |
1046 | ||
1047 | GCPRO2 (buffer, current_dir); | |
1048 | ||
7af71e17 RS |
1049 | current_dir |
1050 | = expand_and_dir_to_file (Funhandled_file_name_directory (current_dir), | |
1051 | Qnil); | |
1e30af70 JB |
1052 | if (NILP (Ffile_accessible_directory_p (current_dir))) |
1053 | report_file_error ("Setting current directory", | |
1054 | Fcons (current_buffer->directory, Qnil)); | |
1055 | ||
1056 | UNGCPRO; | |
1057 | } | |
1058 | ||
d0d6b7c5 JB |
1059 | name = args[0]; |
1060 | CHECK_STRING (name, 0); | |
1061 | ||
1062 | program = args[2]; | |
1063 | ||
1064 | CHECK_STRING (program, 2); | |
1065 | ||
1066 | #ifdef VMS | |
1067 | /* Make a one member argv with all args concatenated | |
1068 | together separated by a blank. */ | |
1069 | len = XSTRING (program)->size + 2; | |
1070 | for (i = 3; i < nargs; i++) | |
1071 | { | |
1072 | tem = args[i]; | |
1073 | CHECK_STRING (tem, i); | |
1074 | len += XSTRING (tem)->size + 1; /* count the blank */ | |
1075 | } | |
1076 | new_argv = (unsigned char *) alloca (len); | |
1077 | strcpy (new_argv, XSTRING (program)->data); | |
1078 | for (i = 3; i < nargs; i++) | |
1079 | { | |
1080 | tem = args[i]; | |
1081 | CHECK_STRING (tem, i); | |
1082 | strcat (new_argv, " "); | |
1083 | strcat (new_argv, XSTRING (tem)->data); | |
1084 | } | |
b0310da4 JB |
1085 | /* Need to add code here to check for program existence on VMS */ |
1086 | ||
d0d6b7c5 JB |
1087 | #else /* not VMS */ |
1088 | new_argv = (unsigned char **) alloca ((nargs - 1) * sizeof (char *)); | |
1089 | ||
d0d6b7c5 | 1090 | /* If program file name is not absolute, search our path for it */ |
e98d950b RS |
1091 | if (!IS_DIRECTORY_SEP (XSTRING (program)->data[0]) |
1092 | && !(XSTRING (program)->size > 1 | |
1093 | && IS_DEVICE_SEP (XSTRING (program)->data[1]))) | |
d0d6b7c5 | 1094 | { |
3b639868 KH |
1095 | struct gcpro gcpro1, gcpro2, gcpro3, gcpro4; |
1096 | ||
d0d6b7c5 | 1097 | tem = Qnil; |
3b639868 | 1098 | GCPRO4 (name, program, buffer, current_dir); |
5437e9f9 | 1099 | openp (Vexec_path, program, EXEC_SUFFIXES, &tem, 1); |
3b639868 | 1100 | UNGCPRO; |
d0d6b7c5 JB |
1101 | if (NILP (tem)) |
1102 | report_file_error ("Searching for program", Fcons (program, Qnil)); | |
f8a87498 | 1103 | tem = Fexpand_file_name (tem, Qnil); |
d0d6b7c5 JB |
1104 | new_argv[0] = XSTRING (tem)->data; |
1105 | } | |
3b639868 | 1106 | else |
13373f4e RS |
1107 | { |
1108 | if (!NILP (Ffile_directory_p (program))) | |
1109 | error ("Specified program for new process is a directory"); | |
1110 | ||
1111 | new_argv[0] = XSTRING (program)->data; | |
1112 | } | |
3b639868 KH |
1113 | |
1114 | for (i = 3; i < nargs; i++) | |
1115 | { | |
1116 | tem = args[i]; | |
1117 | CHECK_STRING (tem, i); | |
1118 | new_argv[i - 2] = XSTRING (tem)->data; | |
1119 | } | |
1120 | new_argv[i - 2] = 0; | |
d0d6b7c5 JB |
1121 | #endif /* not VMS */ |
1122 | ||
1123 | proc = make_process (name); | |
b0310da4 JB |
1124 | /* If an error occurs and we can't start the process, we want to |
1125 | remove it from the process list. This means that each error | |
1126 | check in create_process doesn't need to call remove_process | |
1127 | itself; it's all taken care of here. */ | |
1128 | record_unwind_protect (start_process_unwind, proc); | |
d0d6b7c5 JB |
1129 | |
1130 | XPROCESS (proc)->childp = Qt; | |
1131 | XPROCESS (proc)->command_channel_p = Qnil; | |
1132 | XPROCESS (proc)->buffer = buffer; | |
1133 | XPROCESS (proc)->sentinel = Qnil; | |
1134 | XPROCESS (proc)->filter = Qnil; | |
1135 | XPROCESS (proc)->command = Flist (nargs - 2, args + 2); | |
1136 | ||
7af71e17 RS |
1137 | /* Make the process marker point into the process buffer (if any). */ |
1138 | if (!NILP (buffer)) | |
1139 | Fset_marker (XPROCESS (proc)->mark, | |
1140 | make_number (BUF_ZV (XBUFFER (buffer))), buffer); | |
1141 | ||
1e30af70 | 1142 | create_process (proc, new_argv, current_dir); |
d0d6b7c5 | 1143 | |
b0310da4 | 1144 | return unbind_to (count, proc); |
d0d6b7c5 JB |
1145 | } |
1146 | ||
b0310da4 | 1147 | /* This function is the unwind_protect form for Fstart_process. If |
8e6208c5 | 1148 | PROC doesn't have its pid set, then we know someone has signaled |
b0310da4 JB |
1149 | an error and the process wasn't started successfully, so we should |
1150 | remove it from the process list. */ | |
1151 | static Lisp_Object | |
1152 | start_process_unwind (proc) | |
1153 | Lisp_Object proc; | |
1154 | { | |
bcd69aea | 1155 | if (!PROCESSP (proc)) |
b0310da4 JB |
1156 | abort (); |
1157 | ||
1158 | /* Was PROC started successfully? */ | |
188d6c4e | 1159 | if (XINT (XPROCESS (proc)->pid) <= 0) |
b0310da4 JB |
1160 | remove_process (proc); |
1161 | ||
1162 | return Qnil; | |
1163 | } | |
1164 | ||
1165 | ||
d0d6b7c5 JB |
1166 | SIGTYPE |
1167 | create_process_1 (signo) | |
1168 | int signo; | |
1169 | { | |
1170 | #ifdef USG | |
1171 | /* USG systems forget handlers when they are used; | |
1172 | must reestablish each time */ | |
1173 | signal (signo, create_process_1); | |
1174 | #endif /* USG */ | |
1175 | } | |
1176 | ||
1177 | #if 0 /* This doesn't work; see the note before sigchld_handler. */ | |
1178 | #ifdef USG | |
1179 | #ifdef SIGCHLD | |
1180 | /* Mimic blocking of signals on system V, which doesn't really have it. */ | |
1181 | ||
1182 | /* Nonzero means we got a SIGCHLD when it was supposed to be blocked. */ | |
1183 | int sigchld_deferred; | |
1184 | ||
1185 | SIGTYPE | |
1186 | create_process_sigchld () | |
1187 | { | |
1188 | signal (SIGCHLD, create_process_sigchld); | |
1189 | ||
1190 | sigchld_deferred = 1; | |
1191 | } | |
1192 | #endif | |
1193 | #endif | |
1194 | #endif | |
1195 | ||
1196 | #ifndef VMS /* VMS version of this function is in vmsproc.c. */ | |
1e30af70 | 1197 | create_process (process, new_argv, current_dir) |
d0d6b7c5 JB |
1198 | Lisp_Object process; |
1199 | char **new_argv; | |
1e30af70 | 1200 | Lisp_Object current_dir; |
d0d6b7c5 | 1201 | { |
ecd1f654 | 1202 | int pid, inchannel, outchannel; |
d0d6b7c5 | 1203 | int sv[2]; |
0dc70c33 KH |
1204 | #ifdef POSIX_SIGNALS |
1205 | sigset_t procmask; | |
1206 | sigset_t blocked; | |
1207 | struct sigaction sigint_action; | |
1208 | struct sigaction sigquit_action; | |
1209 | #ifdef AIX | |
1210 | struct sigaction sighup_action; | |
1211 | #endif | |
1212 | #else /* !POSIX_SIGNALS */ | |
d0d6b7c5 JB |
1213 | #ifdef SIGCHLD |
1214 | SIGTYPE (*sigchld)(); | |
1215 | #endif | |
0dc70c33 | 1216 | #endif /* !POSIX_SIGNALS */ |
ecd1f654 KH |
1217 | /* Use volatile to protect variables from being clobbered by longjmp. */ |
1218 | volatile int forkin, forkout; | |
1219 | volatile int pty_flag = 0; | |
d0d6b7c5 JB |
1220 | extern char **environ; |
1221 | ||
d0d6b7c5 JB |
1222 | inchannel = outchannel = -1; |
1223 | ||
1224 | #ifdef HAVE_PTYS | |
fe45da4e | 1225 | if (!NILP (Vprocess_connection_type)) |
d0d6b7c5 JB |
1226 | outchannel = inchannel = allocate_pty (); |
1227 | ||
d0d6b7c5 JB |
1228 | if (inchannel >= 0) |
1229 | { | |
1230 | #ifndef USG | |
1231 | /* On USG systems it does not work to open the pty's tty here | |
1232 | and then close and reopen it in the child. */ | |
1233 | #ifdef O_NOCTTY | |
1234 | /* Don't let this terminal become our controlling terminal | |
1235 | (in case we don't have one). */ | |
1236 | forkout = forkin = open (pty_name, O_RDWR | O_NOCTTY, 0); | |
1237 | #else | |
1238 | forkout = forkin = open (pty_name, O_RDWR, 0); | |
1239 | #endif | |
1240 | if (forkin < 0) | |
1241 | report_file_error ("Opening pty", Qnil); | |
1242 | #else | |
1243 | forkin = forkout = -1; | |
1244 | #endif /* not USG */ | |
1245 | pty_flag = 1; | |
1246 | } | |
1247 | else | |
1248 | #endif /* HAVE_PTYS */ | |
1249 | #ifdef SKTPAIR | |
1250 | { | |
1251 | if (socketpair (AF_UNIX, SOCK_STREAM, 0, sv) < 0) | |
1252 | report_file_error ("Opening socketpair", Qnil); | |
1253 | outchannel = inchannel = sv[0]; | |
1254 | forkout = forkin = sv[1]; | |
1255 | } | |
1256 | #else /* not SKTPAIR */ | |
1257 | { | |
e98d950b RS |
1258 | #ifdef WINDOWSNT |
1259 | pipe_with_inherited_out (sv); | |
1260 | inchannel = sv[0]; | |
1261 | forkout = sv[1]; | |
1262 | ||
1263 | pipe_with_inherited_in (sv); | |
1264 | forkin = sv[0]; | |
1265 | outchannel = sv[1]; | |
1266 | #else /* not WINDOWSNT */ | |
d0d6b7c5 JB |
1267 | pipe (sv); |
1268 | inchannel = sv[0]; | |
1269 | forkout = sv[1]; | |
1270 | pipe (sv); | |
1271 | outchannel = sv[1]; | |
1272 | forkin = sv[0]; | |
e98d950b | 1273 | #endif /* not WINDOWSNT */ |
d0d6b7c5 JB |
1274 | } |
1275 | #endif /* not SKTPAIR */ | |
1276 | ||
1277 | #if 0 | |
1278 | /* Replaced by close_process_descs */ | |
1279 | set_exclusive_use (inchannel); | |
1280 | set_exclusive_use (outchannel); | |
1281 | #endif | |
1282 | ||
1283 | /* Stride people say it's a mystery why this is needed | |
1284 | as well as the O_NDELAY, but that it fails without this. */ | |
1285 | #if defined (STRIDE) || (defined (pfa) && defined (HAVE_PTYS)) | |
1286 | { | |
1287 | int one = 1; | |
1288 | ioctl (inchannel, FIONBIO, &one); | |
1289 | } | |
1290 | #endif | |
1291 | ||
1292 | #ifdef O_NONBLOCK | |
1293 | fcntl (inchannel, F_SETFL, O_NONBLOCK); | |
03832893 | 1294 | fcntl (outchannel, F_SETFL, O_NONBLOCK); |
d0d6b7c5 JB |
1295 | #else |
1296 | #ifdef O_NDELAY | |
1297 | fcntl (inchannel, F_SETFL, O_NDELAY); | |
03832893 | 1298 | fcntl (outchannel, F_SETFL, O_NDELAY); |
d0d6b7c5 JB |
1299 | #endif |
1300 | #endif | |
1301 | ||
1302 | /* Record this as an active process, with its channels. | |
1303 | As a result, child_setup will close Emacs's side of the pipes. */ | |
1304 | chan_process[inchannel] = process; | |
1d056e64 KH |
1305 | XSETINT (XPROCESS (process)->infd, inchannel); |
1306 | XSETINT (XPROCESS (process)->outfd, outchannel); | |
d0d6b7c5 JB |
1307 | /* Record the tty descriptor used in the subprocess. */ |
1308 | if (forkin < 0) | |
1309 | XPROCESS (process)->subtty = Qnil; | |
1310 | else | |
22719df2 | 1311 | XSETFASTINT (XPROCESS (process)->subtty, forkin); |
d0d6b7c5 JB |
1312 | XPROCESS (process)->pty_flag = (pty_flag ? Qt : Qnil); |
1313 | XPROCESS (process)->status = Qrun; | |
1314 | ||
1315 | /* Delay interrupts until we have a chance to store | |
1316 | the new fork's pid in its process structure */ | |
0dc70c33 KH |
1317 | #ifdef POSIX_SIGNALS |
1318 | sigemptyset (&blocked); | |
1319 | #ifdef SIGCHLD | |
1320 | sigaddset (&blocked, SIGCHLD); | |
1321 | #endif | |
1322 | #ifdef HAVE_VFORK | |
1323 | /* On many hosts (e.g. Solaris 2.4), if a vforked child calls `signal', | |
1324 | this sets the parent's signal handlers as well as the child's. | |
1325 | So delay all interrupts whose handlers the child might munge, | |
1326 | and record the current handlers so they can be restored later. */ | |
1327 | sigaddset (&blocked, SIGINT ); sigaction (SIGINT , 0, &sigint_action ); | |
1328 | sigaddset (&blocked, SIGQUIT); sigaction (SIGQUIT, 0, &sigquit_action); | |
1329 | #ifdef AIX | |
1330 | sigaddset (&blocked, SIGHUP ); sigaction (SIGHUP , 0, &sighup_action ); | |
1331 | #endif | |
1332 | #endif /* HAVE_VFORK */ | |
1333 | sigprocmask (SIG_BLOCK, &blocked, &procmask); | |
1334 | #else /* !POSIX_SIGNALS */ | |
d0d6b7c5 JB |
1335 | #ifdef SIGCHLD |
1336 | #ifdef BSD4_1 | |
1337 | sighold (SIGCHLD); | |
1338 | #else /* not BSD4_1 */ | |
1339 | #if defined (BSD) || defined (UNIPLUS) || defined (HPUX) | |
1340 | sigsetmask (sigmask (SIGCHLD)); | |
1341 | #else /* ordinary USG */ | |
1342 | #if 0 | |
1343 | sigchld_deferred = 0; | |
1344 | sigchld = signal (SIGCHLD, create_process_sigchld); | |
1345 | #endif | |
1346 | #endif /* ordinary USG */ | |
1347 | #endif /* not BSD4_1 */ | |
1348 | #endif /* SIGCHLD */ | |
0dc70c33 | 1349 | #endif /* !POSIX_SIGNALS */ |
d0d6b7c5 | 1350 | |
3081bf8d | 1351 | FD_SET (inchannel, &input_wait_mask); |
a69281ff | 1352 | FD_SET (inchannel, &non_keyboard_wait_mask); |
3081bf8d KH |
1353 | if (inchannel > max_process_desc) |
1354 | max_process_desc = inchannel; | |
1355 | ||
d0d6b7c5 JB |
1356 | /* Until we store the proper pid, enable sigchld_handler |
1357 | to recognize an unknown pid as standing for this process. | |
1358 | It is very important not to let this `marker' value stay | |
1359 | in the table after this function has returned; if it does | |
1360 | it might cause call-process to hang and subsequent asynchronous | |
1361 | processes to get their return values scrambled. */ | |
1362 | XSETINT (XPROCESS (process)->pid, -1); | |
1363 | ||
1364 | { | |
1365 | /* child_setup must clobber environ on systems with true vfork. | |
1366 | Protect it from permanent change. */ | |
1367 | char **save_environ = environ; | |
1368 | ||
e98d950b | 1369 | #ifndef WINDOWSNT |
d0d6b7c5 JB |
1370 | pid = vfork (); |
1371 | if (pid == 0) | |
e98d950b | 1372 | #endif /* not WINDOWSNT */ |
d0d6b7c5 JB |
1373 | { |
1374 | int xforkin = forkin; | |
1375 | int xforkout = forkout; | |
1376 | ||
1377 | #if 0 /* This was probably a mistake--it duplicates code later on, | |
1378 | but fails to handle all the cases. */ | |
1379 | /* Make sure SIGCHLD is not blocked in the child. */ | |
1380 | sigsetmask (SIGEMPTYMASK); | |
1381 | #endif | |
1382 | ||
1383 | /* Make the pty be the controlling terminal of the process. */ | |
1384 | #ifdef HAVE_PTYS | |
1385 | /* First, disconnect its current controlling terminal. */ | |
1386 | #ifdef HAVE_SETSID | |
7ce48618 RS |
1387 | /* We tried doing setsid only if pty_flag, but it caused |
1388 | process_set_signal to fail on SGI when using a pipe. */ | |
1389 | setsid (); | |
ce4c9c90 | 1390 | /* Make the pty's terminal the controlling terminal. */ |
084fd64a | 1391 | if (pty_flag) |
39e9ebcd | 1392 | { |
39e9ebcd RS |
1393 | #ifdef TIOCSCTTY |
1394 | /* We ignore the return value | |
1395 | because faith@cs.unc.edu says that is necessary on Linux. */ | |
1396 | ioctl (xforkin, TIOCSCTTY, 0); | |
ce4c9c90 | 1397 | #endif |
39e9ebcd | 1398 | } |
d0d6b7c5 | 1399 | #else /* not HAVE_SETSID */ |
c14e53a4 | 1400 | #ifdef USG |
000ab717 | 1401 | /* It's very important to call setpgrp here and no time |
d0d6b7c5 JB |
1402 | afterwards. Otherwise, we lose our controlling tty which |
1403 | is set when we open the pty. */ | |
1404 | setpgrp (); | |
1405 | #endif /* USG */ | |
1406 | #endif /* not HAVE_SETSID */ | |
9bcf8ec6 KH |
1407 | #if defined (HAVE_TERMIOS) && defined (LDISC1) |
1408 | if (pty_flag && xforkin >= 0) | |
1409 | { | |
1410 | struct termios t; | |
1411 | tcgetattr (xforkin, &t); | |
1412 | t.c_lflag = LDISC1; | |
1413 | if (tcsetattr (xforkin, TCSANOW, &t) < 0) | |
1414 | write (1, "create_process/tcsetattr LDISC1 failed\n", 39); | |
1415 | } | |
1416 | #else | |
aafadd9f | 1417 | #if defined (NTTYDISC) && defined (TIOCSETD) |
ff773a4e | 1418 | if (pty_flag && xforkin >= 0) |
afc549fd RS |
1419 | { |
1420 | /* Use new line discipline. */ | |
1421 | int ldisc = NTTYDISC; | |
4458f555 | 1422 | ioctl (xforkin, TIOCSETD, &ldisc); |
afc549fd | 1423 | } |
000ab717 | 1424 | #endif |
9bcf8ec6 | 1425 | #endif |
d0d6b7c5 JB |
1426 | #ifdef TIOCNOTTY |
1427 | /* In 4.3BSD, the TIOCSPGRP bug has been fixed, and now you | |
1428 | can do TIOCSPGRP only to the process's controlling tty. */ | |
1429 | if (pty_flag) | |
1430 | { | |
1431 | /* I wonder: would just ioctl (0, TIOCNOTTY, 0) work here? | |
1432 | I can't test it since I don't have 4.3. */ | |
1433 | int j = open ("/dev/tty", O_RDWR, 0); | |
1434 | ioctl (j, TIOCNOTTY, 0); | |
1435 | close (j); | |
5a570e37 | 1436 | #ifndef USG |
d0d6b7c5 JB |
1437 | /* In order to get a controlling terminal on some versions |
1438 | of BSD, it is necessary to put the process in pgrp 0 | |
1439 | before it opens the terminal. */ | |
3ea1d291 RS |
1440 | #ifdef OSF1 |
1441 | setpgid (0, 0); | |
1442 | #else | |
d0d6b7c5 | 1443 | setpgrp (0, 0); |
3ea1d291 | 1444 | #endif |
d0d6b7c5 JB |
1445 | #endif |
1446 | } | |
1447 | #endif /* TIOCNOTTY */ | |
1448 | ||
1449 | #if !defined (RTU) && !defined (UNIPLUS) | |
1450 | /*** There is a suggestion that this ought to be a | |
1451 | conditional on TIOCSPGRP. */ | |
1452 | /* Now close the pty (if we had it open) and reopen it. | |
1453 | This makes the pty the controlling terminal of the subprocess. */ | |
1454 | if (pty_flag) | |
1455 | { | |
99e3d726 RS |
1456 | #ifdef SET_CHILD_PTY_PGRP |
1457 | int pgrp = getpid (); | |
1458 | #endif | |
1459 | ||
d0d6b7c5 JB |
1460 | /* I wonder if close (open (pty_name, ...)) would work? */ |
1461 | if (xforkin >= 0) | |
1462 | close (xforkin); | |
1463 | xforkout = xforkin = open (pty_name, O_RDWR, 0); | |
1464 | ||
4aa54ba8 RS |
1465 | if (xforkin < 0) |
1466 | { | |
1467 | write (1, "Couldn't open the pty terminal ", 31); | |
1468 | write (1, pty_name, strlen (pty_name)); | |
1469 | write (1, "\n", 1); | |
1470 | _exit (1); | |
1471 | } | |
1472 | ||
99e3d726 RS |
1473 | #ifdef SET_CHILD_PTY_PGRP |
1474 | ioctl (xforkin, TIOCSPGRP, &pgrp); | |
1475 | ioctl (xforkout, TIOCSPGRP, &pgrp); | |
1476 | #endif | |
d0d6b7c5 JB |
1477 | } |
1478 | #endif /* not UNIPLUS and not RTU */ | |
1479 | #ifdef SETUP_SLAVE_PTY | |
13a72104 RS |
1480 | if (pty_flag) |
1481 | { | |
1482 | SETUP_SLAVE_PTY; | |
1483 | } | |
d0d6b7c5 JB |
1484 | #endif /* SETUP_SLAVE_PTY */ |
1485 | #ifdef AIX | |
1486 | /* On AIX, we've disabled SIGHUP above once we start a child on a pty. | |
1487 | Now reenable it in the child, so it will die when we want it to. */ | |
1488 | if (pty_flag) | |
1489 | signal (SIGHUP, SIG_DFL); | |
1490 | #endif | |
1491 | #endif /* HAVE_PTYS */ | |
1492 | ||
0dc70c33 KH |
1493 | signal (SIGINT, SIG_DFL); |
1494 | signal (SIGQUIT, SIG_DFL); | |
1495 | ||
1496 | /* Stop blocking signals in the child. */ | |
1497 | #ifdef POSIX_SIGNALS | |
1498 | sigprocmask (SIG_SETMASK, &procmask, 0); | |
1499 | #else /* !POSIX_SIGNALS */ | |
d0d6b7c5 JB |
1500 | #ifdef SIGCHLD |
1501 | #ifdef BSD4_1 | |
1502 | sigrelse (SIGCHLD); | |
1503 | #else /* not BSD4_1 */ | |
1504 | #if defined (BSD) || defined (UNIPLUS) || defined (HPUX) | |
1505 | sigsetmask (SIGEMPTYMASK); | |
1506 | #else /* ordinary USG */ | |
63528b78 | 1507 | #if 0 |
d0d6b7c5 | 1508 | signal (SIGCHLD, sigchld); |
63528b78 | 1509 | #endif |
d0d6b7c5 JB |
1510 | #endif /* ordinary USG */ |
1511 | #endif /* not BSD4_1 */ | |
1512 | #endif /* SIGCHLD */ | |
0dc70c33 | 1513 | #endif /* !POSIX_SIGNALS */ |
5e7e1da2 | 1514 | |
ab01d0a8 RS |
1515 | if (pty_flag) |
1516 | child_setup_tty (xforkout); | |
e98d950b RS |
1517 | #ifdef WINDOWSNT |
1518 | pid = child_setup (xforkin, xforkout, xforkout, | |
1519 | new_argv, 1, current_dir); | |
1520 | #else /* not WINDOWSNT */ | |
d0d6b7c5 | 1521 | child_setup (xforkin, xforkout, xforkout, |
e065a56e | 1522 | new_argv, 1, current_dir); |
e98d950b | 1523 | #endif /* not WINDOWSNT */ |
d0d6b7c5 JB |
1524 | } |
1525 | environ = save_environ; | |
1526 | } | |
1527 | ||
4a127b3b | 1528 | /* This runs in the Emacs process. */ |
d0d6b7c5 | 1529 | if (pid < 0) |
6311cf58 RS |
1530 | { |
1531 | if (forkin >= 0) | |
1532 | close (forkin); | |
1533 | if (forkin != forkout && forkout >= 0) | |
1534 | close (forkout); | |
6311cf58 | 1535 | } |
4a127b3b KH |
1536 | else |
1537 | { | |
1538 | /* vfork succeeded. */ | |
1539 | XSETFASTINT (XPROCESS (process)->pid, pid); | |
d0d6b7c5 | 1540 | |
e98d950b | 1541 | #ifdef WINDOWSNT |
4a127b3b | 1542 | register_child (pid, inchannel); |
e98d950b RS |
1543 | #endif /* WINDOWSNT */ |
1544 | ||
4a127b3b KH |
1545 | /* If the subfork execv fails, and it exits, |
1546 | this close hangs. I don't know why. | |
1547 | So have an interrupt jar it loose. */ | |
1548 | stop_polling (); | |
1549 | signal (SIGALRM, create_process_1); | |
1550 | alarm (1); | |
1551 | XPROCESS (process)->subtty = Qnil; | |
1552 | if (forkin >= 0) | |
1553 | close (forkin); | |
1554 | alarm (0); | |
1555 | start_polling (); | |
1556 | if (forkin != forkout && forkout >= 0) | |
1557 | close (forkout); | |
d0d6b7c5 | 1558 | |
875e6b94 | 1559 | #ifdef HAVE_PTYS |
4a127b3b KH |
1560 | if (pty_flag) |
1561 | XPROCESS (process)->tty_name = build_string (pty_name); | |
1562 | else | |
875e6b94 | 1563 | #endif |
4a127b3b KH |
1564 | XPROCESS (process)->tty_name = Qnil; |
1565 | } | |
3b9a3dfa | 1566 | |
4a127b3b KH |
1567 | /* Restore the signal state whether vfork succeeded or not. |
1568 | (We will signal an error, below, if it failed.) */ | |
0dc70c33 KH |
1569 | #ifdef POSIX_SIGNALS |
1570 | #ifdef HAVE_VFORK | |
1571 | /* Restore the parent's signal handlers. */ | |
1572 | sigaction (SIGINT, &sigint_action, 0); | |
1573 | sigaction (SIGQUIT, &sigquit_action, 0); | |
1574 | #ifdef AIX | |
1575 | sigaction (SIGHUP, &sighup_action, 0); | |
1576 | #endif | |
1577 | #endif /* HAVE_VFORK */ | |
1578 | /* Stop blocking signals in the parent. */ | |
1579 | sigprocmask (SIG_SETMASK, &procmask, 0); | |
1580 | #else /* !POSIX_SIGNALS */ | |
d0d6b7c5 JB |
1581 | #ifdef SIGCHLD |
1582 | #ifdef BSD4_1 | |
1583 | sigrelse (SIGCHLD); | |
1584 | #else /* not BSD4_1 */ | |
1585 | #if defined (BSD) || defined (UNIPLUS) || defined (HPUX) | |
1586 | sigsetmask (SIGEMPTYMASK); | |
1587 | #else /* ordinary USG */ | |
1588 | #if 0 | |
1589 | signal (SIGCHLD, sigchld); | |
1590 | /* Now really handle any of these signals | |
1591 | that came in during this function. */ | |
1592 | if (sigchld_deferred) | |
1593 | kill (getpid (), SIGCHLD); | |
1594 | #endif | |
1595 | #endif /* ordinary USG */ | |
1596 | #endif /* not BSD4_1 */ | |
1597 | #endif /* SIGCHLD */ | |
0dc70c33 | 1598 | #endif /* !POSIX_SIGNALS */ |
4a127b3b KH |
1599 | |
1600 | /* Now generate the error if vfork failed. */ | |
1601 | if (pid < 0) | |
1602 | report_file_error ("Doing vfork", Qnil); | |
d0d6b7c5 JB |
1603 | } |
1604 | #endif /* not VMS */ | |
1605 | ||
1606 | #ifdef HAVE_SOCKETS | |
1607 | ||
1608 | /* open a TCP network connection to a given HOST/SERVICE. Treated | |
1609 | exactly like a normal process when reading and writing. Only | |
1610 | differences are in status display and process deletion. A network | |
1611 | connection has no PID; you cannot signal it. All you can do is | |
1612 | deactivate and close it via delete-process */ | |
1613 | ||
1614 | DEFUN ("open-network-stream", Fopen_network_stream, Sopen_network_stream, | |
1615 | 4, 4, 0, | |
1616 | "Open a TCP connection for a service to a host.\n\ | |
1617 | Returns a subprocess-object to represent the connection.\n\ | |
1618 | Input and output work as for subprocesses; `delete-process' closes it.\n\ | |
1619 | Args are NAME BUFFER HOST SERVICE.\n\ | |
1620 | NAME is name for process. It is modified if necessary to make it unique.\n\ | |
1621 | BUFFER is the buffer (or buffer-name) to associate with the process.\n\ | |
1622 | Process output goes at end of that buffer, unless you specify\n\ | |
1623 | an output stream or filter function to handle the output.\n\ | |
1624 | BUFFER may be also nil, meaning that this process is not associated\n\ | |
1625 | with any buffer\n\ | |
1626 | Third arg is name of the host to connect to, or its IP address.\n\ | |
1627 | Fourth arg SERVICE is name of the service desired, or an integer\n\ | |
1628 | specifying a port number to connect to.") | |
1629 | (name, buffer, host, service) | |
1630 | Lisp_Object name, buffer, host, service; | |
1631 | { | |
1632 | Lisp_Object proc; | |
1633 | register int i; | |
1634 | struct sockaddr_in address; | |
1635 | struct servent *svc_info; | |
1636 | struct hostent *host_info_ptr, host_info; | |
1637 | char *(addr_list[2]); | |
79967d5e | 1638 | IN_ADDR numeric_addr; |
d0d6b7c5 JB |
1639 | int s, outch, inch; |
1640 | char errstring[80]; | |
1641 | int port; | |
1642 | struct hostent host_info_fixed; | |
1643 | struct gcpro gcpro1, gcpro2, gcpro3, gcpro4; | |
e333e864 | 1644 | int retry = 0; |
44ade2e9 | 1645 | int count = specpdl_ptr - specpdl; |
d0d6b7c5 JB |
1646 | |
1647 | GCPRO4 (name, buffer, host, service); | |
1648 | CHECK_STRING (name, 0); | |
1649 | CHECK_STRING (host, 0); | |
bcd69aea | 1650 | if (INTEGERP (service)) |
d0d6b7c5 JB |
1651 | port = htons ((unsigned short) XINT (service)); |
1652 | else | |
1653 | { | |
1654 | CHECK_STRING (service, 0); | |
1655 | svc_info = getservbyname (XSTRING (service)->data, "tcp"); | |
1656 | if (svc_info == 0) | |
1657 | error ("Unknown service \"%s\"", XSTRING (service)->data); | |
1658 | port = svc_info->s_port; | |
1659 | } | |
1660 | ||
798b64bb KH |
1661 | /* Slow down polling to every ten seconds. |
1662 | Some kernels have a bug which causes retrying connect to fail | |
1663 | after a connect. Polling can interfere with gethostbyname too. */ | |
1664 | #ifdef POLL_FOR_INPUT | |
1665 | bind_polling_period (10); | |
1666 | #endif | |
1667 | ||
1d2c16fa | 1668 | #ifndef TERM |
616da37c RS |
1669 | while (1) |
1670 | { | |
5f0929a7 RS |
1671 | #ifdef TRY_AGAIN |
1672 | h_errno = 0; | |
1673 | #endif | |
616da37c RS |
1674 | host_info_ptr = gethostbyname (XSTRING (host)->data); |
1675 | #ifdef TRY_AGAIN | |
1676 | if (! (host_info_ptr == 0 && h_errno == TRY_AGAIN)) | |
1677 | #endif | |
1678 | break; | |
1679 | Fsleep_for (make_number (1), Qnil); | |
1680 | } | |
d0d6b7c5 JB |
1681 | if (host_info_ptr == 0) |
1682 | /* Attempt to interpret host as numeric inet address */ | |
1683 | { | |
393a9679 | 1684 | numeric_addr = inet_addr ((char *) XSTRING (host)->data); |
79967d5e | 1685 | if (NUMERIC_ADDR_ERROR) |
d0d6b7c5 JB |
1686 | error ("Unknown host \"%s\"", XSTRING (host)->data); |
1687 | ||
1688 | host_info_ptr = &host_info; | |
1689 | host_info.h_name = 0; | |
1690 | host_info.h_aliases = 0; | |
1691 | host_info.h_addrtype = AF_INET; | |
39a21be6 JB |
1692 | #ifdef h_addr |
1693 | /* Older machines have only one address slot called h_addr. | |
1694 | Newer machines have h_addr_list, but #define h_addr to | |
1695 | be its first element. */ | |
1696 | host_info.h_addr_list = &(addr_list[0]); | |
1697 | #endif | |
1698 | host_info.h_addr = (char*)(&numeric_addr); | |
d0d6b7c5 JB |
1699 | addr_list[1] = 0; |
1700 | host_info.h_length = strlen (addr_list[0]); | |
1701 | } | |
1702 | ||
1703 | bzero (&address, sizeof address); | |
1704 | bcopy (host_info_ptr->h_addr, (char *) &address.sin_addr, | |
1705 | host_info_ptr->h_length); | |
1706 | address.sin_family = host_info_ptr->h_addrtype; | |
1707 | address.sin_port = port; | |
1708 | ||
1709 | s = socket (host_info_ptr->h_addrtype, SOCK_STREAM, 0); | |
1710 | if (s < 0) | |
1711 | report_file_error ("error creating socket", Fcons (name, Qnil)); | |
1712 | ||
457a9bee RS |
1713 | /* Kernel bugs (on Ultrix at least) cause lossage (not just EINTR) |
1714 | when connect is interrupted. So let's not let it get interrupted. | |
1715 | Note we do not turn off polling, because polling is only used | |
1716 | when not interrupt_input, and thus not normally used on the systems | |
1717 | which have this bug. On systems which use polling, there's no way | |
1718 | to quit if polling is turned off. */ | |
1719 | if (interrupt_input) | |
1720 | unrequest_sigio (); | |
1721 | ||
d0d6b7c5 | 1722 | loop: |
e333e864 RS |
1723 | if (connect (s, (struct sockaddr *) &address, sizeof address) == -1 |
1724 | && errno != EISCONN) | |
d0d6b7c5 JB |
1725 | { |
1726 | int xerrno = errno; | |
e333e864 | 1727 | |
d0d6b7c5 JB |
1728 | if (errno == EINTR) |
1729 | goto loop; | |
e333e864 RS |
1730 | if (errno == EADDRINUSE && retry < 20) |
1731 | { | |
4590788a RS |
1732 | /* A delay here is needed on some FreeBSD systems, |
1733 | and it is harmless, since this retrying takes time anyway | |
1734 | and should be infrequent. */ | |
1735 | Fsleep_for (make_number (1), Qnil); | |
e333e864 RS |
1736 | retry++; |
1737 | goto loop; | |
1738 | } | |
1739 | ||
d0d6b7c5 | 1740 | close (s); |
457a9bee RS |
1741 | |
1742 | if (interrupt_input) | |
1743 | request_sigio (); | |
1744 | ||
d0d6b7c5 JB |
1745 | errno = xerrno; |
1746 | report_file_error ("connection failed", | |
1747 | Fcons (host, Fcons (name, Qnil))); | |
1748 | } | |
457a9bee | 1749 | |
44ade2e9 RS |
1750 | #ifdef POLL_FOR_INPUT |
1751 | unbind_to (count, Qnil); | |
1752 | #endif | |
1753 | ||
457a9bee RS |
1754 | if (interrupt_input) |
1755 | request_sigio (); | |
1756 | ||
1d2c16fa RS |
1757 | #else /* TERM */ |
1758 | s = connect_server (0); | |
1759 | if (s < 0) | |
1760 | report_file_error ("error creating socket", Fcons (name, Qnil)); | |
1761 | send_command (s, C_PORT, 0, "%s:%d", XSTRING (host)->data, ntohs (port)); | |
1762 | send_command (s, C_DUMB, 1, 0); | |
1763 | #endif /* TERM */ | |
d0d6b7c5 JB |
1764 | |
1765 | inch = s; | |
1766 | outch = dup (s); | |
1767 | if (outch < 0) | |
1768 | report_file_error ("error duplicating socket", Fcons (name, Qnil)); | |
1769 | ||
1770 | if (!NILP (buffer)) | |
1771 | buffer = Fget_buffer_create (buffer); | |
1772 | proc = make_process (name); | |
1773 | ||
1774 | chan_process[inch] = proc; | |
1775 | ||
1776 | #ifdef O_NONBLOCK | |
1777 | fcntl (inch, F_SETFL, O_NONBLOCK); | |
1778 | #else | |
1779 | #ifdef O_NDELAY | |
1780 | fcntl (inch, F_SETFL, O_NDELAY); | |
1781 | #endif | |
1782 | #endif | |
1783 | ||
1784 | XPROCESS (proc)->childp = host; | |
1785 | XPROCESS (proc)->command_channel_p = Qnil; | |
1786 | XPROCESS (proc)->buffer = buffer; | |
1787 | XPROCESS (proc)->sentinel = Qnil; | |
1788 | XPROCESS (proc)->filter = Qnil; | |
1789 | XPROCESS (proc)->command = Qnil; | |
1790 | XPROCESS (proc)->pid = Qnil; | |
1d056e64 KH |
1791 | XSETINT (XPROCESS (proc)->infd, s); |
1792 | XSETINT (XPROCESS (proc)->outfd, outch); | |
d0d6b7c5 JB |
1793 | XPROCESS (proc)->status = Qrun; |
1794 | FD_SET (inch, &input_wait_mask); | |
a69281ff | 1795 | FD_SET (inch, &non_keyboard_wait_mask); |
7d0e672e RS |
1796 | if (inch > max_process_desc) |
1797 | max_process_desc = inch; | |
d0d6b7c5 JB |
1798 | |
1799 | UNGCPRO; | |
1800 | return proc; | |
1801 | } | |
1802 | #endif /* HAVE_SOCKETS */ | |
1803 | ||
1804 | deactivate_process (proc) | |
1805 | Lisp_Object proc; | |
1806 | { | |
1807 | register int inchannel, outchannel; | |
1808 | register struct Lisp_Process *p = XPROCESS (proc); | |
1809 | ||
a9f2c884 RS |
1810 | inchannel = XINT (p->infd); |
1811 | outchannel = XINT (p->outfd); | |
d0d6b7c5 | 1812 | |
a9f2c884 | 1813 | if (inchannel >= 0) |
d0d6b7c5 JB |
1814 | { |
1815 | /* Beware SIGCHLD hereabouts. */ | |
1816 | flush_pending_output (inchannel); | |
1817 | #ifdef VMS | |
1818 | { | |
1819 | VMS_PROC_STUFF *get_vms_process_pointer (), *vs; | |
1820 | sys$dassgn (outchannel); | |
c6c6865d | 1821 | vs = get_vms_process_pointer (p->pid); |
d0d6b7c5 JB |
1822 | if (vs) |
1823 | give_back_vms_process_stuff (vs); | |
1824 | } | |
1825 | #else | |
1826 | close (inchannel); | |
a9f2c884 | 1827 | if (outchannel >= 0 && outchannel != inchannel) |
d0d6b7c5 JB |
1828 | close (outchannel); |
1829 | #endif | |
1830 | ||
1d056e64 KH |
1831 | XSETINT (p->infd, -1); |
1832 | XSETINT (p->outfd, -1); | |
d0d6b7c5 JB |
1833 | chan_process[inchannel] = Qnil; |
1834 | FD_CLR (inchannel, &input_wait_mask); | |
a69281ff | 1835 | FD_CLR (inchannel, &non_keyboard_wait_mask); |
7d0e672e RS |
1836 | if (inchannel == max_process_desc) |
1837 | { | |
1838 | int i; | |
1839 | /* We just closed the highest-numbered process input descriptor, | |
1840 | so recompute the highest-numbered one now. */ | |
1841 | max_process_desc = 0; | |
1842 | for (i = 0; i < MAXDESC; i++) | |
1843 | if (!NILP (chan_process[i])) | |
1844 | max_process_desc = i; | |
1845 | } | |
d0d6b7c5 JB |
1846 | } |
1847 | } | |
1848 | ||
1849 | /* Close all descriptors currently in use for communication | |
1850 | with subprocess. This is used in a newly-forked subprocess | |
1851 | to get rid of irrelevant descriptors. */ | |
1852 | ||
1853 | close_process_descs () | |
1854 | { | |
e98d950b | 1855 | #ifndef WINDOWSNT |
d0d6b7c5 JB |
1856 | int i; |
1857 | for (i = 0; i < MAXDESC; i++) | |
1858 | { | |
1859 | Lisp_Object process; | |
1860 | process = chan_process[i]; | |
1861 | if (!NILP (process)) | |
1862 | { | |
a9f2c884 RS |
1863 | int in = XINT (XPROCESS (process)->infd); |
1864 | int out = XINT (XPROCESS (process)->outfd); | |
1865 | if (in >= 0) | |
d0d6b7c5 | 1866 | close (in); |
a9f2c884 | 1867 | if (out >= 0 && in != out) |
d0d6b7c5 JB |
1868 | close (out); |
1869 | } | |
1870 | } | |
e98d950b | 1871 | #endif |
d0d6b7c5 JB |
1872 | } |
1873 | \f | |
1874 | DEFUN ("accept-process-output", Faccept_process_output, Saccept_process_output, | |
1875 | 0, 3, 0, | |
1876 | "Allow any pending output from subprocesses to be read by Emacs.\n\ | |
1877 | It is read into the process' buffers or given to their filter functions.\n\ | |
1878 | Non-nil arg PROCESS means do not return until some output has been received\n\ | |
1879 | from PROCESS.\n\ | |
1880 | Non-nil second arg TIMEOUT and third arg TIMEOUT-MSECS are number of\n\ | |
1881 | seconds and microseconds to wait; return after that much time whether\n\ | |
1882 | or not there is input.\n\ | |
1883 | Return non-nil iff we received any output before the timeout expired.") | |
4ee3e309 EN |
1884 | (process, timeout, timeout_msecs) |
1885 | register Lisp_Object process, timeout, timeout_msecs; | |
d0d6b7c5 JB |
1886 | { |
1887 | int seconds; | |
1888 | int useconds; | |
1889 | ||
1890 | if (! NILP (timeout_msecs)) | |
1891 | { | |
1892 | CHECK_NUMBER (timeout_msecs, 2); | |
1893 | useconds = XINT (timeout_msecs); | |
bcd69aea | 1894 | if (!INTEGERP (timeout)) |
1d056e64 | 1895 | XSETINT (timeout, 0); |
d0d6b7c5 JB |
1896 | |
1897 | { | |
1898 | int carry = useconds / 1000000; | |
1899 | ||
1900 | XSETINT (timeout, XINT (timeout) + carry); | |
1901 | useconds -= carry * 1000000; | |
1902 | ||
1903 | /* I think this clause is necessary because C doesn't | |
1904 | guarantee a particular rounding direction for negative | |
1905 | integers. */ | |
1906 | if (useconds < 0) | |
1907 | { | |
1908 | XSETINT (timeout, XINT (timeout) - 1); | |
1909 | useconds += 1000000; | |
1910 | } | |
1911 | } | |
1912 | } | |
de946e5a RS |
1913 | else |
1914 | useconds = 0; | |
d0d6b7c5 JB |
1915 | |
1916 | if (! NILP (timeout)) | |
1917 | { | |
1918 | CHECK_NUMBER (timeout, 1); | |
1919 | seconds = XINT (timeout); | |
1920 | if (seconds <= 0) | |
1921 | seconds = -1; | |
1922 | } | |
1923 | else | |
1924 | { | |
4ee3e309 | 1925 | if (NILP (process)) |
d0d6b7c5 JB |
1926 | seconds = -1; |
1927 | else | |
1928 | seconds = 0; | |
1929 | } | |
1930 | ||
4ee3e309 EN |
1931 | if (NILP (process)) |
1932 | XSETFASTINT (process, 0); | |
f76475ad | 1933 | |
d0d6b7c5 | 1934 | return |
4ee3e309 | 1935 | (wait_reading_process_input (seconds, useconds, process, 0) |
d0d6b7c5 JB |
1936 | ? Qt : Qnil); |
1937 | } | |
1938 | ||
1939 | /* This variable is different from waiting_for_input in keyboard.c. | |
1940 | It is used to communicate to a lisp process-filter/sentinel (via the | |
1941 | function Fwaiting_for_user_input_p below) whether emacs was waiting | |
1942 | for user-input when that process-filter was called. | |
1943 | waiting_for_input cannot be used as that is by definition 0 when | |
d430ee71 RS |
1944 | lisp code is being evalled. |
1945 | This is also used in record_asynch_buffer_change. | |
1946 | For that purpose, this must be 0 | |
1947 | when not inside wait_reading_process_input. */ | |
d0d6b7c5 JB |
1948 | static int waiting_for_user_input_p; |
1949 | ||
1950 | /* Read and dispose of subprocess output while waiting for timeout to | |
1951 | elapse and/or keyboard input to be available. | |
1952 | ||
de6fd4b9 | 1953 | TIME_LIMIT is: |
d0d6b7c5 JB |
1954 | timeout in seconds, or |
1955 | zero for no limit, or | |
1956 | -1 means gobble data immediately available but don't wait for any. | |
1957 | ||
de6fd4b9 RS |
1958 | MICROSECS is: |
1959 | an additional duration to wait, measured in microseconds. | |
1960 | If this is nonzero and time_limit is 0, then the timeout | |
1961 | consists of MICROSECS only. | |
6e4f3667 | 1962 | |
de6fd4b9 | 1963 | READ_KBD is a lisp value: |
d0d6b7c5 JB |
1964 | 0 to ignore keyboard input, or |
1965 | 1 to return when input is available, or | |
84aa3ace | 1966 | -1 meaning caller will actually read the input, so don't throw to |
d0d6b7c5 | 1967 | the quit handler, or |
e6194ffc | 1968 | a cons cell, meaning wait until its car is non-nil |
de6fd4b9 | 1969 | (and gobble terminal input into the buffer if any arrives), or |
f76475ad JB |
1970 | a process object, meaning wait until something arrives from that |
1971 | process. The return value is true iff we read some input from | |
1972 | that process. | |
d0d6b7c5 | 1973 | |
de6fd4b9 | 1974 | DO_DISPLAY != 0 means redisplay should be done to show subprocess |
d0d6b7c5 JB |
1975 | output that arrives. |
1976 | ||
de6fd4b9 | 1977 | If READ_KBD is a pointer to a struct Lisp_Process, then the |
d0d6b7c5 JB |
1978 | function returns true iff we received input from that process |
1979 | before the timeout elapsed. | |
eb8c3be9 | 1980 | Otherwise, return true iff we received input from any process. */ |
d0d6b7c5 JB |
1981 | |
1982 | wait_reading_process_input (time_limit, microsecs, read_kbd, do_display) | |
f76475ad JB |
1983 | int time_limit, microsecs; |
1984 | Lisp_Object read_kbd; | |
1985 | int do_display; | |
d0d6b7c5 JB |
1986 | { |
1987 | register int channel, nfds, m; | |
1988 | static SELECT_TYPE Available; | |
1989 | int xerrno; | |
1990 | Lisp_Object proc; | |
1991 | EMACS_TIME timeout, end_time, garbage; | |
1992 | SELECT_TYPE Atemp; | |
a9f2c884 | 1993 | int wait_channel = -1; |
d0d6b7c5 JB |
1994 | struct Lisp_Process *wait_proc = 0; |
1995 | int got_some_input = 0; | |
84aa3ace | 1996 | Lisp_Object *wait_for_cell = 0; |
d0d6b7c5 JB |
1997 | |
1998 | FD_ZERO (&Available); | |
1999 | ||
f76475ad JB |
2000 | /* If read_kbd is a process to watch, set wait_proc and wait_channel |
2001 | accordingly. */ | |
bcd69aea | 2002 | if (PROCESSP (read_kbd)) |
d0d6b7c5 | 2003 | { |
f76475ad | 2004 | wait_proc = XPROCESS (read_kbd); |
a9f2c884 | 2005 | wait_channel = XINT (wait_proc->infd); |
22719df2 | 2006 | XSETFASTINT (read_kbd, 0); |
d0d6b7c5 JB |
2007 | } |
2008 | ||
84aa3ace | 2009 | /* If waiting for non-nil in a cell, record where. */ |
bcd69aea | 2010 | if (CONSP (read_kbd)) |
84aa3ace RS |
2011 | { |
2012 | wait_for_cell = &XCONS (read_kbd)->car; | |
22719df2 | 2013 | XSETFASTINT (read_kbd, 0); |
84aa3ace RS |
2014 | } |
2015 | ||
f76475ad | 2016 | waiting_for_user_input_p = XINT (read_kbd); |
d0d6b7c5 JB |
2017 | |
2018 | /* Since we may need to wait several times, | |
2019 | compute the absolute time to return at. */ | |
2020 | if (time_limit || microsecs) | |
2021 | { | |
2022 | EMACS_GET_TIME (end_time); | |
2023 | EMACS_SET_SECS_USECS (timeout, time_limit, microsecs); | |
2024 | EMACS_ADD_TIME (end_time, end_time, timeout); | |
2025 | } | |
2026 | ||
d0d6b7c5 JB |
2027 | while (1) |
2028 | { | |
2029 | /* If calling from keyboard input, do not quit | |
2030 | since we want to return C-g as an input character. | |
2031 | Otherwise, do pending quit if requested. */ | |
f76475ad | 2032 | if (XINT (read_kbd) >= 0) |
d0d6b7c5 JB |
2033 | QUIT; |
2034 | ||
889255b4 RS |
2035 | /* Exit now if the cell we're waiting for became non-nil. */ |
2036 | if (wait_for_cell && ! NILP (*wait_for_cell)) | |
2037 | break; | |
2038 | ||
d0d6b7c5 JB |
2039 | /* Compute time from now till when time limit is up */ |
2040 | /* Exit if already run out */ | |
2041 | if (time_limit == -1) | |
2042 | { | |
2043 | /* -1 specified for timeout means | |
2044 | gobble output available now | |
2045 | but don't wait at all. */ | |
2046 | ||
2047 | EMACS_SET_SECS_USECS (timeout, 0, 0); | |
2048 | } | |
2049 | else if (time_limit || microsecs) | |
2050 | { | |
2051 | EMACS_GET_TIME (timeout); | |
2052 | EMACS_SUB_TIME (timeout, end_time, timeout); | |
2053 | if (EMACS_TIME_NEG_P (timeout)) | |
2054 | break; | |
2055 | } | |
2056 | else | |
2057 | { | |
2058 | EMACS_SET_SECS_USECS (timeout, 100000, 0); | |
2059 | } | |
2060 | ||
fb4c3627 RS |
2061 | /* If our caller will not immediately handle keyboard events, |
2062 | run timer events directly. | |
2063 | (Callers that will immediately read keyboard events | |
2064 | call timer_delay on their own.) */ | |
2065 | if (read_kbd >= 0) | |
2066 | { | |
2067 | EMACS_TIME timer_delay = timer_check (1); | |
2068 | if (! EMACS_TIME_NEG_P (timer_delay)) | |
2069 | { | |
2070 | EMACS_TIME difference; | |
2071 | EMACS_SUB_TIME (difference, timer_delay, timeout); | |
2072 | if (EMACS_TIME_NEG_P (difference)) | |
2073 | timeout = timer_delay; | |
2074 | } | |
2075 | } | |
2076 | ||
90ab1a81 JB |
2077 | /* Cause C-g and alarm signals to take immediate action, |
2078 | and cause input available signals to zero out timeout. | |
2079 | ||
2080 | It is important that we do this before checking for process | |
2081 | activity. If we get a SIGCHLD after the explicit checks for | |
2082 | process activity, timeout is the only way we will know. */ | |
2083 | if (XINT (read_kbd) < 0) | |
2084 | set_waiting_for_input (&timeout); | |
2085 | ||
6be429b1 JB |
2086 | /* If status of something has changed, and no input is |
2087 | available, notify the user of the change right away. After | |
2088 | this explicit check, we'll let the SIGCHLD handler zap | |
2089 | timeout to get our attention. */ | |
2090 | if (update_tick != process_tick && do_display) | |
2091 | { | |
2092 | Atemp = input_wait_mask; | |
2093 | EMACS_SET_SECS_USECS (timeout, 0, 0); | |
ecd1f654 KH |
2094 | if ((select (MAXDESC, &Atemp, (SELECT_TYPE *)0, (SELECT_TYPE *)0, |
2095 | &timeout) | |
2096 | <= 0)) | |
90ab1a81 JB |
2097 | { |
2098 | /* It's okay for us to do this and then continue with | |
a0e4d3f3 | 2099 | the loop, since timeout has already been zeroed out. */ |
90ab1a81 JB |
2100 | clear_waiting_for_input (); |
2101 | status_notify (); | |
2102 | } | |
6be429b1 JB |
2103 | } |
2104 | ||
2105 | /* Don't wait for output from a non-running process. */ | |
2106 | if (wait_proc != 0 && !NILP (wait_proc->raw_status_low)) | |
2107 | update_status (wait_proc); | |
2108 | if (wait_proc != 0 | |
2109 | && ! EQ (wait_proc->status, Qrun)) | |
9aa2a7f4 JB |
2110 | { |
2111 | clear_waiting_for_input (); | |
2112 | break; | |
2113 | } | |
6be429b1 | 2114 | |
d0d6b7c5 JB |
2115 | /* Wait till there is something to do */ |
2116 | ||
5e7e1da2 | 2117 | if (! XINT (read_kbd) && wait_for_cell == 0) |
a69281ff RS |
2118 | Available = non_keyboard_wait_mask; |
2119 | else | |
2120 | Available = input_wait_mask; | |
d0d6b7c5 | 2121 | |
ff11dfa1 | 2122 | /* If frame size has changed or the window is newly mapped, |
ffd56f97 JB |
2123 | redisplay now, before we start to wait. There is a race |
2124 | condition here; if a SIGIO arrives between now and the select | |
016899c0 JB |
2125 | and indicates that a frame is trashed, the select may block |
2126 | displaying a trashed screen. */ | |
5164ee8e | 2127 | if (frame_garbaged && do_display) |
7286affd RS |
2128 | { |
2129 | clear_waiting_for_input (); | |
2130 | redisplay_preserve_echo_area (); | |
2131 | if (XINT (read_kbd) < 0) | |
7efe788e | 2132 | set_waiting_for_input (&timeout); |
7286affd | 2133 | } |
ffd56f97 | 2134 | |
f76475ad | 2135 | if (XINT (read_kbd) && detect_input_pending ()) |
a9f2c884 RS |
2136 | { |
2137 | nfds = 0; | |
2138 | FD_ZERO (&Available); | |
2139 | } | |
d0d6b7c5 | 2140 | else |
ecd1f654 KH |
2141 | nfds = select (MAXDESC, &Available, (SELECT_TYPE *)0, (SELECT_TYPE *)0, |
2142 | &timeout); | |
6720a7fb | 2143 | |
d0d6b7c5 JB |
2144 | xerrno = errno; |
2145 | ||
2146 | /* Make C-g and alarm signals set flags again */ | |
2147 | clear_waiting_for_input (); | |
2148 | ||
2149 | /* If we woke up due to SIGWINCH, actually change size now. */ | |
2150 | do_pending_window_change (); | |
2151 | ||
ffd56f97 | 2152 | if (time_limit && nfds == 0) /* timeout elapsed */ |
d0d6b7c5 JB |
2153 | break; |
2154 | if (nfds < 0) | |
2155 | { | |
2156 | if (xerrno == EINTR) | |
2157 | FD_ZERO (&Available); | |
b0310da4 JB |
2158 | #ifdef ultrix |
2159 | /* Ultrix select seems to return ENOMEM when it is | |
2160 | interrupted. Treat it just like EINTR. Bleah. Note | |
2161 | that we want to test for the "ultrix" CPP symbol, not | |
2162 | "__ultrix__"; the latter is only defined under GCC, but | |
2163 | not by DEC's bundled CC. -JimB */ | |
8058415c JB |
2164 | else if (xerrno == ENOMEM) |
2165 | FD_ZERO (&Available); | |
2166 | #endif | |
d0d6b7c5 JB |
2167 | #ifdef ALLIANT |
2168 | /* This happens for no known reason on ALLIANT. | |
2169 | I am guessing that this is the right response. -- RMS. */ | |
2170 | else if (xerrno == EFAULT) | |
2171 | FD_ZERO (&Available); | |
2172 | #endif | |
2173 | else if (xerrno == EBADF) | |
2174 | { | |
2175 | #ifdef AIX | |
2176 | /* AIX doesn't handle PTY closure the same way BSD does. On AIX, | |
2177 | the child's closure of the pts gives the parent a SIGHUP, and | |
2178 | the ptc file descriptor is automatically closed, | |
2179 | yielding EBADF here or at select() call above. | |
2180 | So, SIGHUP is ignored (see def of PTY_TTY_NAME_SPRINTF | |
a0e4d3f3 | 2181 | in m/ibmrt-aix.h), and here we just ignore the select error. |
d0d6b7c5 | 2182 | Cleanup occurs c/o status_notify after SIGCLD. */ |
ffd56f97 | 2183 | FD_ZERO (&Available); /* Cannot depend on values returned */ |
d0d6b7c5 JB |
2184 | #else |
2185 | abort (); | |
2186 | #endif | |
2187 | } | |
2188 | else | |
b062d1fe | 2189 | error("select error: %s", strerror (xerrno)); |
d0d6b7c5 | 2190 | } |
26ec91de | 2191 | #if defined(sun) && !defined(USG5_4) |
a69281ff | 2192 | else if (nfds > 0 && keyboard_bit_set (&Available) |
dd2281ae | 2193 | && interrupt_input) |
e0109153 JB |
2194 | /* System sometimes fails to deliver SIGIO. |
2195 | ||
2196 | David J. Mackenzie says that Emacs doesn't compile under | |
2197 | Solaris if this code is enabled, thus the USG5_4 in the CPP | |
2198 | conditional. "I haven't noticed any ill effects so far. | |
2199 | If you find a Solaris expert somewhere, they might know | |
2200 | better." */ | |
d0d6b7c5 JB |
2201 | kill (getpid (), SIGIO); |
2202 | #endif | |
2203 | ||
2204 | /* Check for keyboard input */ | |
2205 | /* If there is any, return immediately | |
2206 | to give it higher priority than subprocesses */ | |
2207 | ||
e6194ffc | 2208 | /* We used to do this if wait_for_cell, |
6cbc22ed | 2209 | but that caused infinite recursion in selection request events. */ |
5e7e1da2 | 2210 | if ((XINT (read_kbd) || wait_for_cell) |
97f3b3d6 | 2211 | && detect_input_pending ()) |
6e103bac RS |
2212 | { |
2213 | swallow_events (); | |
2214 | if (detect_input_pending ()) | |
2215 | break; | |
2216 | } | |
d0d6b7c5 | 2217 | |
84aa3ace RS |
2218 | /* Exit now if the cell we're waiting for became non-nil. */ |
2219 | if (wait_for_cell && ! NILP (*wait_for_cell)) | |
2220 | break; | |
2221 | ||
4746118a | 2222 | #ifdef SIGIO |
d0d6b7c5 JB |
2223 | /* If we think we have keyboard input waiting, but didn't get SIGIO |
2224 | go read it. This can happen with X on BSD after logging out. | |
2225 | In that case, there really is no input and no SIGIO, | |
2226 | but select says there is input. */ | |
2227 | ||
dd2281ae | 2228 | if (XINT (read_kbd) && interrupt_input |
a69281ff | 2229 | && (keyboard_bit_set (&Available))) |
d0d6b7c5 | 2230 | kill (0, SIGIO); |
4746118a | 2231 | #endif |
d0d6b7c5 | 2232 | |
d0d6b7c5 JB |
2233 | if (! wait_proc) |
2234 | got_some_input |= nfds > 0; | |
2235 | ||
32676c08 JB |
2236 | /* If checking input just got us a size-change event from X, |
2237 | obey it now if we should. */ | |
97f3b3d6 | 2238 | if (XINT (read_kbd) || wait_for_cell) |
32676c08 JB |
2239 | do_pending_window_change (); |
2240 | ||
a9f2c884 RS |
2241 | /* Check for data from a process. */ |
2242 | /* Really FIRST_PROC_DESC should be 0 on Unix, | |
2243 | but this is safer in the short run. */ | |
a69281ff | 2244 | for (channel = 0; channel <= max_process_desc; channel++) |
d0d6b7c5 | 2245 | { |
a69281ff RS |
2246 | if (FD_ISSET (channel, &Available) |
2247 | && FD_ISSET (channel, &non_keyboard_wait_mask)) | |
d0d6b7c5 JB |
2248 | { |
2249 | int nread; | |
2250 | ||
2251 | /* If waiting for this channel, arrange to return as | |
2252 | soon as no more input to be processed. No more | |
2253 | waiting. */ | |
2254 | if (wait_channel == channel) | |
2255 | { | |
a9f2c884 | 2256 | wait_channel = -1; |
d0d6b7c5 JB |
2257 | time_limit = -1; |
2258 | got_some_input = 1; | |
2259 | } | |
2260 | proc = chan_process[channel]; | |
2261 | if (NILP (proc)) | |
2262 | continue; | |
2263 | ||
d0d6b7c5 JB |
2264 | /* Read data from the process, starting with our |
2265 | buffered-ahead character if we have one. */ | |
2266 | ||
2267 | nread = read_process_output (proc, channel); | |
2268 | if (nread > 0) | |
2269 | { | |
2270 | /* Since read_process_output can run a filter, | |
2271 | which can call accept-process-output, | |
2272 | don't try to read from any other processes | |
2273 | before doing the select again. */ | |
2274 | FD_ZERO (&Available); | |
2275 | ||
2276 | if (do_display) | |
2277 | redisplay_preserve_echo_area (); | |
2278 | } | |
2279 | #ifdef EWOULDBLOCK | |
2280 | else if (nread == -1 && errno == EWOULDBLOCK) | |
2281 | ; | |
2282 | #else | |
2283 | #ifdef O_NONBLOCK | |
2284 | else if (nread == -1 && errno == EAGAIN) | |
2285 | ; | |
2286 | #else | |
2287 | #ifdef O_NDELAY | |
2288 | else if (nread == -1 && errno == EAGAIN) | |
2289 | ; | |
2290 | /* Note that we cannot distinguish between no input | |
2291 | available now and a closed pipe. | |
2292 | With luck, a closed pipe will be accompanied by | |
2293 | subprocess termination and SIGCHLD. */ | |
2294 | else if (nread == 0 && !NETCONN_P (proc)) | |
2295 | ; | |
ffd56f97 JB |
2296 | #endif /* O_NDELAY */ |
2297 | #endif /* O_NONBLOCK */ | |
2298 | #endif /* EWOULDBLOCK */ | |
d0d6b7c5 JB |
2299 | #ifdef HAVE_PTYS |
2300 | /* On some OSs with ptys, when the process on one end of | |
2301 | a pty exits, the other end gets an error reading with | |
2302 | errno = EIO instead of getting an EOF (0 bytes read). | |
2303 | Therefore, if we get an error reading and errno = | |
2304 | EIO, just continue, because the child process has | |
2305 | exited and should clean itself up soon (e.g. when we | |
2306 | get a SIGCHLD). */ | |
2307 | else if (nread == -1 && errno == EIO) | |
2308 | ; | |
ffd56f97 JB |
2309 | #endif /* HAVE_PTYS */ |
2310 | /* If we can detect process termination, don't consider the process | |
2311 | gone just because its pipe is closed. */ | |
d0d6b7c5 JB |
2312 | #ifdef SIGCHLD |
2313 | else if (nread == 0 && !NETCONN_P (proc)) | |
2314 | ; | |
2315 | #endif | |
2316 | else | |
2317 | { | |
2318 | /* Preserve status of processes already terminated. */ | |
2319 | XSETINT (XPROCESS (proc)->tick, ++process_tick); | |
2320 | deactivate_process (proc); | |
2321 | if (!NILP (XPROCESS (proc)->raw_status_low)) | |
2322 | update_status (XPROCESS (proc)); | |
2323 | if (EQ (XPROCESS (proc)->status, Qrun)) | |
2324 | XPROCESS (proc)->status | |
2325 | = Fcons (Qexit, Fcons (make_number (256), Qnil)); | |
2326 | } | |
2327 | } | |
ffd56f97 JB |
2328 | } /* end for each file descriptor */ |
2329 | } /* end while exit conditions not met */ | |
d0d6b7c5 | 2330 | |
d430ee71 RS |
2331 | waiting_for_user_input_p = 0; |
2332 | ||
ffd56f97 JB |
2333 | /* If calling from keyboard input, do not quit |
2334 | since we want to return C-g as an input character. | |
2335 | Otherwise, do pending quit if requested. */ | |
f76475ad | 2336 | if (XINT (read_kbd) >= 0) |
ffd56f97 JB |
2337 | { |
2338 | /* Prevent input_pending from remaining set if we quit. */ | |
2339 | clear_input_pending (); | |
2340 | QUIT; | |
2341 | } | |
d0d6b7c5 JB |
2342 | |
2343 | return got_some_input; | |
2344 | } | |
2345 | \f | |
3b9a3dfa RS |
2346 | /* Given a list (FUNCTION ARGS...), apply FUNCTION to the ARGS. */ |
2347 | ||
2348 | static Lisp_Object | |
2349 | read_process_output_call (fun_and_args) | |
2350 | Lisp_Object fun_and_args; | |
2351 | { | |
2352 | return apply1 (XCONS (fun_and_args)->car, XCONS (fun_and_args)->cdr); | |
2353 | } | |
2354 | ||
2355 | static Lisp_Object | |
2356 | read_process_output_error_handler (error) | |
2357 | Lisp_Object error; | |
2358 | { | |
2359 | cmd_error_internal (error, "error in process filter: "); | |
2360 | Vinhibit_quit = Qt; | |
2361 | update_echo_area (); | |
833ba342 | 2362 | Fsleep_for (make_number (2), Qnil); |
3b9a3dfa RS |
2363 | } |
2364 | ||
d0d6b7c5 JB |
2365 | /* Read pending output from the process channel, |
2366 | starting with our buffered-ahead character if we have one. | |
2367 | Yield number of characters read. | |
2368 | ||
2369 | This function reads at most 1024 characters. | |
2370 | If you want to read all available subprocess output, | |
2371 | you must call it repeatedly until it returns zero. */ | |
2372 | ||
2373 | read_process_output (proc, channel) | |
2374 | Lisp_Object proc; | |
2375 | register int channel; | |
2376 | { | |
2377 | register int nchars; | |
2378 | #ifdef VMS | |
2379 | char *chars; | |
2380 | #else | |
2381 | char chars[1024]; | |
2382 | #endif | |
2383 | register Lisp_Object outstream; | |
2384 | register struct buffer *old = current_buffer; | |
2385 | register struct Lisp_Process *p = XPROCESS (proc); | |
2386 | register int opoint; | |
2387 | ||
2388 | #ifdef VMS | |
2389 | VMS_PROC_STUFF *vs, *get_vms_process_pointer(); | |
2390 | ||
2391 | vs = get_vms_process_pointer (p->pid); | |
2392 | if (vs) | |
2393 | { | |
2394 | if (!vs->iosb[0]) | |
2395 | return(0); /* Really weird if it does this */ | |
2396 | if (!(vs->iosb[0] & 1)) | |
2397 | return -1; /* I/O error */ | |
2398 | } | |
2399 | else | |
2400 | error ("Could not get VMS process pointer"); | |
2401 | chars = vs->inputBuffer; | |
2402 | nchars = clean_vms_buffer (chars, vs->iosb[1]); | |
2403 | if (nchars <= 0) | |
2404 | { | |
2405 | start_vms_process_read (vs); /* Crank up the next read on the process */ | |
2406 | return 1; /* Nothing worth printing, say we got 1 */ | |
2407 | } | |
2408 | #else /* not VMS */ | |
2409 | ||
2410 | if (proc_buffered_char[channel] < 0) | |
e98d950b RS |
2411 | #ifdef WINDOWSNT |
2412 | nchars = read_child_output (channel, chars, sizeof (chars)); | |
2413 | #else | |
d0d6b7c5 | 2414 | nchars = read (channel, chars, sizeof chars); |
e98d950b | 2415 | #endif |
d0d6b7c5 JB |
2416 | else |
2417 | { | |
2418 | chars[0] = proc_buffered_char[channel]; | |
2419 | proc_buffered_char[channel] = -1; | |
e98d950b RS |
2420 | #ifdef WINDOWSNT |
2421 | nchars = read_child_output (channel, chars + 1, sizeof (chars) - 1); | |
2422 | #else | |
d0d6b7c5 | 2423 | nchars = read (channel, chars + 1, sizeof chars - 1); |
e98d950b | 2424 | #endif |
d0d6b7c5 JB |
2425 | if (nchars < 0) |
2426 | nchars = 1; | |
2427 | else | |
2428 | nchars = nchars + 1; | |
2429 | } | |
2430 | #endif /* not VMS */ | |
2431 | ||
2432 | if (nchars <= 0) return nchars; | |
2433 | ||
2434 | outstream = p->filter; | |
2435 | if (!NILP (outstream)) | |
2436 | { | |
2437 | /* We inhibit quit here instead of just catching it so that | |
2438 | hitting ^G when a filter happens to be running won't screw | |
2439 | it up. */ | |
2440 | int count = specpdl_ptr - specpdl; | |
30c78175 | 2441 | Lisp_Object odeactivate; |
dfc21838 | 2442 | Lisp_Object obuffer, okeymap; |
30c78175 | 2443 | |
dfc21838 RS |
2444 | /* No need to gcpro these, because all we do with them later |
2445 | is test them for EQness, and none of them should be a string. */ | |
30c78175 | 2446 | odeactivate = Vdeactivate_mark; |
dfc21838 RS |
2447 | XSETBUFFER (obuffer, current_buffer); |
2448 | okeymap = current_buffer->keymap; | |
30c78175 | 2449 | |
d0d6b7c5 | 2450 | specbind (Qinhibit_quit, Qt); |
6545aada | 2451 | specbind (Qlast_nonmenu_event, Qt); |
3b9a3dfa | 2452 | |
7074fde6 | 2453 | running_asynch_code = 1; |
3b9a3dfa RS |
2454 | internal_condition_case_1 (read_process_output_call, |
2455 | Fcons (outstream, | |
2456 | Fcons (proc, | |
7074fde6 FP |
2457 | Fcons (make_string (chars, |
2458 | nchars), | |
3b9a3dfa RS |
2459 | Qnil))), |
2460 | !NILP (Vdebug_on_error) ? Qnil : Qerror, | |
2461 | read_process_output_error_handler); | |
7074fde6 FP |
2462 | running_asynch_code = 0; |
2463 | restore_match_data (); | |
d0d6b7c5 | 2464 | |
592ce97f | 2465 | /* Handling the process output should not deactivate the mark. */ |
30c78175 RS |
2466 | Vdeactivate_mark = odeactivate; |
2467 | ||
7973cfa8 RS |
2468 | #if 0 /* Call record_asynch_buffer_change unconditionally, |
2469 | because we might have changed minor modes or other things | |
2470 | that affect key bindings. */ | |
dfc21838 RS |
2471 | if (! EQ (Fcurrent_buffer (), obuffer) |
2472 | || ! EQ (current_buffer->keymap, okeymap)) | |
7973cfa8 | 2473 | #endif |
927e08be RS |
2474 | /* But do it only if the caller is actually going to read events. |
2475 | Otherwise there's no need to make him wake up, and it could | |
2476 | cause trouble (for example it would make Fsit_for return). */ | |
2477 | if (waiting_for_user_input_p == -1) | |
2478 | record_asynch_buffer_change (); | |
d72534ba | 2479 | |
d0d6b7c5 JB |
2480 | #ifdef VMS |
2481 | start_vms_process_read (vs); | |
2482 | #endif | |
2ea6d561 | 2483 | unbind_to (count, Qnil); |
d0d6b7c5 JB |
2484 | return nchars; |
2485 | } | |
2486 | ||
2487 | /* If no filter, write into buffer if it isn't dead. */ | |
2488 | if (!NILP (p->buffer) && !NILP (XBUFFER (p->buffer)->name)) | |
2489 | { | |
b0310da4 JB |
2490 | Lisp_Object old_read_only; |
2491 | Lisp_Object old_begv, old_zv; | |
30c78175 RS |
2492 | Lisp_Object odeactivate; |
2493 | ||
2494 | odeactivate = Vdeactivate_mark; | |
d0d6b7c5 JB |
2495 | |
2496 | Fset_buffer (p->buffer); | |
2497 | opoint = point; | |
b0310da4 | 2498 | old_read_only = current_buffer->read_only; |
22719df2 KH |
2499 | XSETFASTINT (old_begv, BEGV); |
2500 | XSETFASTINT (old_zv, ZV); | |
b0310da4 JB |
2501 | |
2502 | current_buffer->read_only = Qnil; | |
d0d6b7c5 JB |
2503 | |
2504 | /* Insert new output into buffer | |
2505 | at the current end-of-output marker, | |
2506 | thus preserving logical ordering of input and output. */ | |
2507 | if (XMARKER (p->mark)->buffer) | |
53aad33f | 2508 | SET_PT (clip_to_bounds (BEGV, marker_position (p->mark), ZV)); |
d0d6b7c5 JB |
2509 | else |
2510 | SET_PT (ZV); | |
b0310da4 JB |
2511 | |
2512 | /* If the output marker is outside of the visible region, save | |
2513 | the restriction and widen. */ | |
2514 | if (! (BEGV <= point && point <= ZV)) | |
2515 | Fwiden (); | |
2516 | ||
2517 | /* Make sure opoint floats ahead of any new text, just as point | |
2518 | would. */ | |
d0d6b7c5 JB |
2519 | if (point <= opoint) |
2520 | opoint += nchars; | |
2521 | ||
b0310da4 JB |
2522 | /* Insert after old_begv, but before old_zv. */ |
2523 | if (point < XFASTINT (old_begv)) | |
7c6f34f0 | 2524 | XSETFASTINT (old_begv, XFASTINT (old_begv) + nchars); |
b0310da4 | 2525 | if (point <= XFASTINT (old_zv)) |
7c6f34f0 | 2526 | XSETFASTINT (old_zv, XFASTINT (old_zv) + nchars); |
b0310da4 | 2527 | |
d0d6b7c5 JB |
2528 | /* Insert before markers in case we are inserting where |
2529 | the buffer's mark is, and the user's next command is Meta-y. */ | |
2530 | insert_before_markers (chars, nchars); | |
d0d6b7c5 | 2531 | Fset_marker (p->mark, make_number (point), p->buffer); |
b0310da4 | 2532 | |
d0d6b7c5 JB |
2533 | update_mode_lines++; |
2534 | ||
b0310da4 JB |
2535 | /* If the restriction isn't what it should be, set it. */ |
2536 | if (XFASTINT (old_begv) != BEGV || XFASTINT (old_zv) != ZV) | |
2537 | Fnarrow_to_region (old_begv, old_zv); | |
2538 | ||
592ce97f | 2539 | /* Handling the process output should not deactivate the mark. */ |
30c78175 RS |
2540 | Vdeactivate_mark = odeactivate; |
2541 | ||
b0310da4 | 2542 | current_buffer->read_only = old_read_only; |
d0d6b7c5 JB |
2543 | SET_PT (opoint); |
2544 | set_buffer_internal (old); | |
2545 | } | |
2546 | #ifdef VMS | |
2547 | start_vms_process_read (vs); | |
2548 | #endif | |
2549 | return nchars; | |
2550 | } | |
2551 | ||
2552 | DEFUN ("waiting-for-user-input-p", Fwaiting_for_user_input_p, Swaiting_for_user_input_p, | |
2553 | 0, 0, 0, | |
8b4d685f | 2554 | "Returns non-nil if emacs is waiting for input from the user.\n\ |
d0d6b7c5 JB |
2555 | This is intended for use by asynchronous process output filters and sentinels.") |
2556 | () | |
2557 | { | |
8b4d685f | 2558 | return (waiting_for_user_input_p ? Qt : Qnil); |
d0d6b7c5 JB |
2559 | } |
2560 | \f | |
2561 | /* Sending data to subprocess */ | |
2562 | ||
2563 | jmp_buf send_process_frame; | |
2564 | ||
2565 | SIGTYPE | |
2566 | send_process_trap () | |
2567 | { | |
2568 | #ifdef BSD4_1 | |
2569 | sigrelse (SIGPIPE); | |
2570 | sigrelse (SIGALRM); | |
2571 | #endif /* BSD4_1 */ | |
2572 | longjmp (send_process_frame, 1); | |
2573 | } | |
2574 | ||
4556b700 RS |
2575 | /* Send some data to process PROC. |
2576 | BUF is the beginning of the data; LEN is the number of characters. | |
2577 | OBJECT is the Lisp object that the data comes from. */ | |
2578 | ||
2579 | send_process (proc, buf, len, object) | |
ecd1f654 | 2580 | volatile Lisp_Object proc; |
d0d6b7c5 JB |
2581 | char *buf; |
2582 | int len; | |
4556b700 | 2583 | Lisp_Object object; |
d0d6b7c5 | 2584 | { |
ecd1f654 | 2585 | /* Use volatile to protect variables from being clobbered by longjmp. */ |
d0d6b7c5 | 2586 | int rv; |
ecd1f654 | 2587 | volatile unsigned char *procname = XSTRING (XPROCESS (proc)->name)->data; |
d0d6b7c5 | 2588 | |
d0d6b7c5 JB |
2589 | #ifdef VMS |
2590 | struct Lisp_Process *p = XPROCESS (proc); | |
2591 | VMS_PROC_STUFF *vs, *get_vms_process_pointer(); | |
2592 | #endif /* VMS */ | |
2593 | ||
2594 | if (! NILP (XPROCESS (proc)->raw_status_low)) | |
2595 | update_status (XPROCESS (proc)); | |
2596 | if (! EQ (XPROCESS (proc)->status, Qrun)) | |
2597 | error ("Process %s not running", procname); | |
2598 | ||
2599 | #ifdef VMS | |
2600 | vs = get_vms_process_pointer (p->pid); | |
2601 | if (vs == 0) | |
2602 | error ("Could not find this process: %x", p->pid); | |
2603 | else if (write_to_vms_process (vs, buf, len)) | |
2604 | ; | |
2605 | #else | |
4556b700 RS |
2606 | |
2607 | if (pty_max_bytes == 0) | |
2608 | { | |
2609 | #if defined (HAVE_FPATHCONF) && defined (_PC_MAX_CANON) | |
2610 | pty_max_bytes = fpathconf (XFASTINT (XPROCESS (proc)->outfd), | |
2611 | _PC_MAX_CANON); | |
2612 | if (pty_max_bytes < 0) | |
2613 | pty_max_bytes = 250; | |
2614 | #else | |
2615 | pty_max_bytes = 250; | |
2616 | #endif | |
2617 | /* Deduct one, to leave space for the eof. */ | |
2618 | pty_max_bytes--; | |
2619 | } | |
2620 | ||
d0d6b7c5 JB |
2621 | if (!setjmp (send_process_frame)) |
2622 | while (len > 0) | |
2623 | { | |
2624 | int this = len; | |
4746118a | 2625 | SIGTYPE (*old_sigpipe)(); |
93b4f699 RS |
2626 | int flush_pty = 0; |
2627 | ||
4556b700 RS |
2628 | /* Decide how much data we can send in one batch. |
2629 | Long lines need to be split into multiple batches. */ | |
2630 | if (!NILP (XPROCESS (proc)->pty_flag)) | |
93b4f699 | 2631 | { |
4556b700 RS |
2632 | /* Starting this at zero is always correct when not the first iteration |
2633 | because the previous iteration ended by sending C-d. | |
2634 | It may not be correct for the first iteration | |
2635 | if a partial line was sent in a separate send_process call. | |
2636 | If that proves worth handling, we need to save linepos | |
2637 | in the process object. */ | |
2638 | int linepos = 0; | |
2639 | char *ptr = buf; | |
2640 | char *end = buf + len; | |
2641 | ||
2642 | /* Scan through this text for a line that is too long. */ | |
2643 | while (ptr != end && linepos < pty_max_bytes) | |
2644 | { | |
2645 | if (*ptr == '\n') | |
2646 | linepos = 0; | |
2647 | else | |
2648 | linepos++; | |
2649 | ptr++; | |
2650 | } | |
2651 | /* If we found one, break the line there | |
2652 | and put in a C-d to force the buffer through. */ | |
2653 | this = ptr - buf; | |
93b4f699 RS |
2654 | } |
2655 | ||
4556b700 RS |
2656 | /* Send this batch, using one or more write calls. */ |
2657 | while (this > 0) | |
d0d6b7c5 | 2658 | { |
4556b700 RS |
2659 | old_sigpipe = (SIGTYPE (*) ()) signal (SIGPIPE, send_process_trap); |
2660 | rv = write (XINT (XPROCESS (proc)->outfd), buf, this); | |
2661 | signal (SIGPIPE, old_sigpipe); | |
2662 | ||
2663 | if (rv < 0) | |
2664 | { | |
2665 | if (0 | |
d0d6b7c5 | 2666 | #ifdef EWOULDBLOCK |
4556b700 | 2667 | || errno == EWOULDBLOCK |
d0d6b7c5 JB |
2668 | #endif |
2669 | #ifdef EAGAIN | |
4556b700 | 2670 | || errno == EAGAIN |
d0d6b7c5 | 2671 | #endif |
4556b700 RS |
2672 | ) |
2673 | /* Buffer is full. Wait, accepting input; | |
2674 | that may allow the program | |
2675 | to finish doing output and read more. */ | |
2676 | { | |
2677 | Lisp_Object zero; | |
2678 | int offset; | |
2679 | ||
2680 | /* Running filters might relocate buffers or strings. | |
2681 | Arrange to relocate BUF. */ | |
2682 | if (BUFFERP (object)) | |
2683 | offset = BUF_PTR_CHAR_POS (XBUFFER (object), | |
2684 | (unsigned char *) buf); | |
2685 | else if (STRINGP (object)) | |
2686 | offset = buf - (char *) XSTRING (object)->data; | |
2687 | ||
22719df2 | 2688 | XSETFASTINT (zero, 0); |
4556b700 RS |
2689 | wait_reading_process_input (1, 0, zero, 0); |
2690 | ||
2691 | if (BUFFERP (object)) | |
2692 | buf = (char *) BUF_CHAR_ADDRESS (XBUFFER (object), offset); | |
2693 | else if (STRINGP (object)) | |
2694 | buf = offset + (char *) XSTRING (object)->data; | |
2695 | ||
2696 | rv = 0; | |
2697 | } | |
2698 | else | |
2699 | /* This is a real error. */ | |
2700 | report_file_error ("writing to process", Fcons (proc, Qnil)); | |
d0d6b7c5 | 2701 | } |
4556b700 RS |
2702 | buf += rv; |
2703 | len -= rv; | |
2704 | this -= rv; | |
d0d6b7c5 | 2705 | } |
f76475ad | 2706 | |
4556b700 RS |
2707 | /* If we sent just part of the string, put in an EOF |
2708 | to force it through, before we send the rest. */ | |
2709 | if (len > 0) | |
2710 | Fprocess_send_eof (proc); | |
d0d6b7c5 JB |
2711 | } |
2712 | #endif | |
2713 | else | |
2714 | { | |
2715 | XPROCESS (proc)->raw_status_low = Qnil; | |
2716 | XPROCESS (proc)->raw_status_high = Qnil; | |
2717 | XPROCESS (proc)->status = Fcons (Qexit, Fcons (make_number (256), Qnil)); | |
2718 | XSETINT (XPROCESS (proc)->tick, ++process_tick); | |
2719 | deactivate_process (proc); | |
2720 | #ifdef VMS | |
2721 | error ("Error writing to process %s; closed it", procname); | |
2722 | #else | |
2723 | error ("SIGPIPE raised on process %s; closed it", procname); | |
2724 | #endif | |
2725 | } | |
2726 | } | |
2727 | ||
2728 | DEFUN ("process-send-region", Fprocess_send_region, Sprocess_send_region, | |
2729 | 3, 3, 0, | |
2730 | "Send current contents of region as input to PROCESS.\n\ | |
ebb9e16f JB |
2731 | PROCESS may be a process, a buffer, the name of a process or buffer, or\n\ |
2732 | nil, indicating the current buffer's process.\n\ | |
d0d6b7c5 JB |
2733 | Called from program, takes three arguments, PROCESS, START and END.\n\ |
2734 | If the region is more than 500 characters long,\n\ | |
2735 | it is sent in several bunches. This may happen even for shorter regions.\n\ | |
2736 | Output from processes can arrive in between bunches.") | |
2737 | (process, start, end) | |
2738 | Lisp_Object process, start, end; | |
2739 | { | |
2740 | Lisp_Object proc; | |
2741 | int start1; | |
2742 | ||
2743 | proc = get_process (process); | |
2744 | validate_region (&start, &end); | |
2745 | ||
2746 | if (XINT (start) < GPT && XINT (end) > GPT) | |
2747 | move_gap (start); | |
2748 | ||
2749 | start1 = XINT (start); | |
4556b700 RS |
2750 | send_process (proc, &FETCH_CHAR (start1), XINT (end) - XINT (start), |
2751 | Fcurrent_buffer ()); | |
d0d6b7c5 JB |
2752 | |
2753 | return Qnil; | |
2754 | } | |
2755 | ||
2756 | DEFUN ("process-send-string", Fprocess_send_string, Sprocess_send_string, | |
2757 | 2, 2, 0, | |
2758 | "Send PROCESS the contents of STRING as input.\n\ | |
ebb9e16f JB |
2759 | PROCESS may be a process, a buffer, the name of a process or buffer, or\n\ |
2760 | nil, indicating the current buffer's process.\n\ | |
d0d6b7c5 JB |
2761 | If STRING is more than 500 characters long,\n\ |
2762 | it is sent in several bunches. This may happen even for shorter strings.\n\ | |
2763 | Output from processes can arrive in between bunches.") | |
2764 | (process, string) | |
2765 | Lisp_Object process, string; | |
2766 | { | |
2767 | Lisp_Object proc; | |
2768 | CHECK_STRING (string, 1); | |
2769 | proc = get_process (process); | |
4556b700 | 2770 | send_process (proc, XSTRING (string)->data, XSTRING (string)->size, string); |
d0d6b7c5 JB |
2771 | return Qnil; |
2772 | } | |
2773 | \f | |
2774 | /* send a signal number SIGNO to PROCESS. | |
2775 | CURRENT_GROUP means send to the process group that currently owns | |
2776 | the terminal being used to communicate with PROCESS. | |
2777 | This is used for various commands in shell mode. | |
2778 | If NOMSG is zero, insert signal-announcements into process's buffers | |
b0310da4 JB |
2779 | right away. |
2780 | ||
2781 | If we can, we try to signal PROCESS by sending control characters | |
e333e864 | 2782 | down the pty. This allows us to signal inferiors who have changed |
b0310da4 | 2783 | their uid, for which killpg would return an EPERM error. */ |
d0d6b7c5 | 2784 | |
f9738840 | 2785 | static void |
d0d6b7c5 JB |
2786 | process_send_signal (process, signo, current_group, nomsg) |
2787 | Lisp_Object process; | |
2788 | int signo; | |
2789 | Lisp_Object current_group; | |
2790 | int nomsg; | |
2791 | { | |
2792 | Lisp_Object proc; | |
2793 | register struct Lisp_Process *p; | |
2794 | int gid; | |
2795 | int no_pgrp = 0; | |
2796 | ||
2797 | proc = get_process (process); | |
2798 | p = XPROCESS (proc); | |
2799 | ||
2800 | if (!EQ (p->childp, Qt)) | |
2801 | error ("Process %s is not a subprocess", | |
2802 | XSTRING (p->name)->data); | |
a9f2c884 | 2803 | if (XINT (p->infd) < 0) |
d0d6b7c5 JB |
2804 | error ("Process %s is not active", |
2805 | XSTRING (p->name)->data); | |
2806 | ||
2807 | if (NILP (p->pty_flag)) | |
2808 | current_group = Qnil; | |
2809 | ||
d0d6b7c5 JB |
2810 | /* If we are using pgrps, get a pgrp number and make it negative. */ |
2811 | if (!NILP (current_group)) | |
2812 | { | |
b0310da4 | 2813 | #ifdef SIGNALS_VIA_CHARACTERS |
d0d6b7c5 JB |
2814 | /* If possible, send signals to the entire pgrp |
2815 | by sending an input character to it. */ | |
b0310da4 | 2816 | |
6be429b1 JB |
2817 | /* TERMIOS is the latest and bestest, and seems most likely to |
2818 | work. If the system has it, use it. */ | |
2819 | #ifdef HAVE_TERMIOS | |
2820 | struct termios t; | |
2821 | ||
2822 | switch (signo) | |
2823 | { | |
2824 | case SIGINT: | |
a9f2c884 | 2825 | tcgetattr (XINT (p->infd), &t); |
4556b700 | 2826 | send_process (proc, &t.c_cc[VINTR], 1, Qnil); |
a87b802f | 2827 | return; |
6be429b1 JB |
2828 | |
2829 | case SIGQUIT: | |
a9f2c884 | 2830 | tcgetattr (XINT (p->infd), &t); |
4556b700 | 2831 | send_process (proc, &t.c_cc[VQUIT], 1, Qnil); |
a87b802f | 2832 | return; |
6be429b1 JB |
2833 | |
2834 | case SIGTSTP: | |
a9f2c884 | 2835 | tcgetattr (XINT (p->infd), &t); |
d0adf46f | 2836 | #if defined (VSWTCH) && !defined (PREFER_VSUSP) |
4556b700 | 2837 | send_process (proc, &t.c_cc[VSWTCH], 1, Qnil); |
6be429b1 | 2838 | #else |
4556b700 | 2839 | send_process (proc, &t.c_cc[VSUSP], 1, Qnil); |
6be429b1 | 2840 | #endif |
a87b802f | 2841 | return; |
6be429b1 JB |
2842 | } |
2843 | ||
2844 | #else /* ! HAVE_TERMIOS */ | |
2845 | ||
b0310da4 JB |
2846 | /* On Berkeley descendants, the following IOCTL's retrieve the |
2847 | current control characters. */ | |
d0d6b7c5 | 2848 | #if defined (TIOCGLTC) && defined (TIOCGETC) |
b0310da4 | 2849 | |
d0d6b7c5 JB |
2850 | struct tchars c; |
2851 | struct ltchars lc; | |
2852 | ||
2853 | switch (signo) | |
2854 | { | |
2855 | case SIGINT: | |
a9f2c884 | 2856 | ioctl (XINT (p->infd), TIOCGETC, &c); |
4556b700 | 2857 | send_process (proc, &c.t_intrc, 1, Qnil); |
f9738840 | 2858 | return; |
d0d6b7c5 | 2859 | case SIGQUIT: |
a9f2c884 | 2860 | ioctl (XINT (p->infd), TIOCGETC, &c); |
4556b700 | 2861 | send_process (proc, &c.t_quitc, 1, Qnil); |
f9738840 | 2862 | return; |
0ad77c54 | 2863 | #ifdef SIGTSTP |
d0d6b7c5 | 2864 | case SIGTSTP: |
a9f2c884 | 2865 | ioctl (XINT (p->infd), TIOCGLTC, &lc); |
4556b700 | 2866 | send_process (proc, &lc.t_suspc, 1, Qnil); |
f9738840 | 2867 | return; |
b0310da4 | 2868 | #endif /* ! defined (SIGTSTP) */ |
d0d6b7c5 | 2869 | } |
b0310da4 JB |
2870 | |
2871 | #else /* ! defined (TIOCGLTC) && defined (TIOCGETC) */ | |
2872 | ||
2873 | /* On SYSV descendants, the TCGETA ioctl retrieves the current control | |
2874 | characters. */ | |
2875 | #ifdef TCGETA | |
d0d6b7c5 JB |
2876 | struct termio t; |
2877 | switch (signo) | |
2878 | { | |
2879 | case SIGINT: | |
a9f2c884 | 2880 | ioctl (XINT (p->infd), TCGETA, &t); |
4556b700 | 2881 | send_process (proc, &t.c_cc[VINTR], 1, Qnil); |
f9738840 | 2882 | return; |
d0d6b7c5 | 2883 | case SIGQUIT: |
a9f2c884 | 2884 | ioctl (XINT (p->infd), TCGETA, &t); |
4556b700 | 2885 | send_process (proc, &t.c_cc[VQUIT], 1, Qnil); |
f9738840 | 2886 | return; |
7d79e3b4 | 2887 | #ifdef SIGTSTP |
d0d6b7c5 | 2888 | case SIGTSTP: |
a9f2c884 | 2889 | ioctl (XINT (p->infd), TCGETA, &t); |
4556b700 | 2890 | send_process (proc, &t.c_cc[VSWTCH], 1, Qnil); |
f9738840 | 2891 | return; |
b0310da4 | 2892 | #endif /* ! defined (SIGTSTP) */ |
d0d6b7c5 | 2893 | } |
b0310da4 JB |
2894 | #else /* ! defined (TCGETA) */ |
2895 | Your configuration files are messed up. | |
2896 | /* If your system configuration files define SIGNALS_VIA_CHARACTERS, | |
2897 | you'd better be using one of the alternatives above! */ | |
2898 | #endif /* ! defined (TCGETA) */ | |
2899 | #endif /* ! defined (TIOCGLTC) && defined (TIOCGETC) */ | |
6be429b1 | 2900 | #endif /* ! defined HAVE_TERMIOS */ |
b0310da4 | 2901 | #endif /* ! defined (SIGNALS_VIA_CHARACTERS) */ |
d0d6b7c5 | 2902 | |
301c3fe4 | 2903 | #ifdef TIOCGPGRP |
d0d6b7c5 JB |
2904 | /* Get the pgrp using the tty itself, if we have that. |
2905 | Otherwise, use the pty to get the pgrp. | |
2906 | On pfa systems, saka@pfu.fujitsu.co.JP writes: | |
b0310da4 JB |
2907 | "TIOCGPGRP symbol defined in sys/ioctl.h at E50. |
2908 | But, TIOCGPGRP does not work on E50 ;-P works fine on E60" | |
d0d6b7c5 JB |
2909 | His patch indicates that if TIOCGPGRP returns an error, then |
2910 | we should just assume that p->pid is also the process group id. */ | |
2911 | { | |
2912 | int err; | |
2913 | ||
2914 | if (!NILP (p->subtty)) | |
2915 | err = ioctl (XFASTINT (p->subtty), TIOCGPGRP, &gid); | |
2916 | else | |
a9f2c884 | 2917 | err = ioctl (XINT (p->infd), TIOCGPGRP, &gid); |
d0d6b7c5 JB |
2918 | |
2919 | #ifdef pfa | |
2920 | if (err == -1) | |
2921 | gid = - XFASTINT (p->pid); | |
301c3fe4 | 2922 | #endif /* ! defined (pfa) */ |
d0d6b7c5 JB |
2923 | } |
2924 | if (gid == -1) | |
2925 | no_pgrp = 1; | |
2926 | else | |
2927 | gid = - gid; | |
b0310da4 | 2928 | #else /* ! defined (TIOCGPGRP ) */ |
301c3fe4 JB |
2929 | /* Can't select pgrps on this system, so we know that |
2930 | the child itself heads the pgrp. */ | |
2931 | gid = - XFASTINT (p->pid); | |
2932 | #endif /* ! defined (TIOCGPGRP ) */ | |
d0d6b7c5 JB |
2933 | } |
2934 | else | |
2935 | gid = - XFASTINT (p->pid); | |
d0d6b7c5 JB |
2936 | |
2937 | switch (signo) | |
2938 | { | |
2939 | #ifdef SIGCONT | |
2940 | case SIGCONT: | |
2941 | p->raw_status_low = Qnil; | |
2942 | p->raw_status_high = Qnil; | |
2943 | p->status = Qrun; | |
2944 | XSETINT (p->tick, ++process_tick); | |
2945 | if (!nomsg) | |
2946 | status_notify (); | |
2947 | break; | |
301c3fe4 | 2948 | #endif /* ! defined (SIGCONT) */ |
d0d6b7c5 JB |
2949 | case SIGINT: |
2950 | #ifdef VMS | |
4556b700 | 2951 | send_process (proc, "\003", 1, Qnil); /* ^C */ |
d0d6b7c5 JB |
2952 | goto whoosh; |
2953 | #endif | |
2954 | case SIGQUIT: | |
2955 | #ifdef VMS | |
4556b700 | 2956 | send_process (proc, "\031", 1, Qnil); /* ^Y */ |
d0d6b7c5 JB |
2957 | goto whoosh; |
2958 | #endif | |
2959 | case SIGKILL: | |
2960 | #ifdef VMS | |
2961 | sys$forcex (&(XFASTINT (p->pid)), 0, 1); | |
2962 | whoosh: | |
2963 | #endif | |
a9f2c884 | 2964 | flush_pending_output (XINT (p->infd)); |
d0d6b7c5 JB |
2965 | break; |
2966 | } | |
2967 | ||
2968 | /* If we don't have process groups, send the signal to the immediate | |
2969 | subprocess. That isn't really right, but it's better than any | |
2970 | obvious alternative. */ | |
2971 | if (no_pgrp) | |
2972 | { | |
2973 | kill (XFASTINT (p->pid), signo); | |
2974 | return; | |
2975 | } | |
2976 | ||
2977 | /* gid may be a pid, or minus a pgrp's number */ | |
2978 | #ifdef TIOCSIGSEND | |
2979 | if (!NILP (current_group)) | |
a9f2c884 | 2980 | ioctl (XINT (p->infd), TIOCSIGSEND, signo); |
d0d6b7c5 JB |
2981 | else |
2982 | { | |
2983 | gid = - XFASTINT (p->pid); | |
2984 | kill (gid, signo); | |
2985 | } | |
301c3fe4 | 2986 | #else /* ! defined (TIOCSIGSEND) */ |
d0d6b7c5 | 2987 | EMACS_KILLPG (-gid, signo); |
301c3fe4 | 2988 | #endif /* ! defined (TIOCSIGSEND) */ |
d0d6b7c5 JB |
2989 | } |
2990 | ||
2991 | DEFUN ("interrupt-process", Finterrupt_process, Sinterrupt_process, 0, 2, 0, | |
2992 | "Interrupt process PROCESS. May be process or name of one.\n\ | |
ebb9e16f | 2993 | PROCESS may be a process, a buffer, or the name of a process or buffer.\n\ |
e333e864 | 2994 | nil or no arg means current buffer's process.\n\ |
d0d6b7c5 JB |
2995 | Second arg CURRENT-GROUP non-nil means send signal to\n\ |
2996 | the current process-group of the process's controlling terminal\n\ | |
2997 | rather than to the process's own process group.\n\ | |
2998 | If the process is a shell, this means interrupt current subjob\n\ | |
2999 | rather than the shell.") | |
3000 | (process, current_group) | |
3001 | Lisp_Object process, current_group; | |
3002 | { | |
3003 | process_send_signal (process, SIGINT, current_group, 0); | |
3004 | return process; | |
3005 | } | |
3006 | ||
3007 | DEFUN ("kill-process", Fkill_process, Skill_process, 0, 2, 0, | |
3008 | "Kill process PROCESS. May be process or name of one.\n\ | |
3009 | See function `interrupt-process' for more details on usage.") | |
3010 | (process, current_group) | |
3011 | Lisp_Object process, current_group; | |
3012 | { | |
3013 | process_send_signal (process, SIGKILL, current_group, 0); | |
3014 | return process; | |
3015 | } | |
3016 | ||
3017 | DEFUN ("quit-process", Fquit_process, Squit_process, 0, 2, 0, | |
3018 | "Send QUIT signal to process PROCESS. May be process or name of one.\n\ | |
3019 | See function `interrupt-process' for more details on usage.") | |
3020 | (process, current_group) | |
3021 | Lisp_Object process, current_group; | |
3022 | { | |
3023 | process_send_signal (process, SIGQUIT, current_group, 0); | |
3024 | return process; | |
3025 | } | |
3026 | ||
3027 | DEFUN ("stop-process", Fstop_process, Sstop_process, 0, 2, 0, | |
3028 | "Stop process PROCESS. May be process or name of one.\n\ | |
3029 | See function `interrupt-process' for more details on usage.") | |
3030 | (process, current_group) | |
3031 | Lisp_Object process, current_group; | |
3032 | { | |
3033 | #ifndef SIGTSTP | |
3034 | error ("no SIGTSTP support"); | |
3035 | #else | |
3036 | process_send_signal (process, SIGTSTP, current_group, 0); | |
3037 | #endif | |
3038 | return process; | |
3039 | } | |
3040 | ||
3041 | DEFUN ("continue-process", Fcontinue_process, Scontinue_process, 0, 2, 0, | |
3042 | "Continue process PROCESS. May be process or name of one.\n\ | |
3043 | See function `interrupt-process' for more details on usage.") | |
3044 | (process, current_group) | |
3045 | Lisp_Object process, current_group; | |
3046 | { | |
3047 | #ifdef SIGCONT | |
3048 | process_send_signal (process, SIGCONT, current_group, 0); | |
3049 | #else | |
3050 | error ("no SIGCONT support"); | |
3051 | #endif | |
3052 | return process; | |
3053 | } | |
3054 | ||
3055 | DEFUN ("signal-process", Fsignal_process, Ssignal_process, | |
3056 | 2, 2, "nProcess number: \nnSignal code: ", | |
4766242d RS |
3057 | "Send the process with process id PID the signal with code SIGCODE.\n\ |
3058 | PID must be an integer. The process need not be a child of this Emacs.\n\ | |
3059 | SIGCODE may be an integer, or a symbol whose name is a signal name.") | |
3060 | (pid, sigcode) | |
3061 | Lisp_Object pid, sigcode; | |
d0d6b7c5 JB |
3062 | { |
3063 | CHECK_NUMBER (pid, 0); | |
4766242d RS |
3064 | |
3065 | #define handle_signal(NAME, VALUE) \ | |
3066 | else if (!strcmp (name, NAME)) \ | |
3067 | XSETINT (sigcode, VALUE) | |
3068 | ||
3069 | if (INTEGERP (sigcode)) | |
3070 | ; | |
3071 | else | |
3072 | { | |
3073 | unsigned char *name; | |
3074 | ||
3075 | CHECK_SYMBOL (sigcode, 1); | |
3076 | name = XSYMBOL (sigcode)->name->data; | |
3077 | ||
3078 | if (0) | |
3079 | ; | |
3080 | #ifdef SIGHUP | |
3081 | handle_signal ("SIGHUP", SIGHUP); | |
3082 | #endif | |
3083 | #ifdef SIGINT | |
3084 | handle_signal ("SIGINT", SIGINT); | |
3085 | #endif | |
3086 | #ifdef SIGQUIT | |
3087 | handle_signal ("SIGQUIT", SIGQUIT); | |
3088 | #endif | |
3089 | #ifdef SIGILL | |
3090 | handle_signal ("SIGILL", SIGILL); | |
3091 | #endif | |
3092 | #ifdef SIGABRT | |
3093 | handle_signal ("SIGABRT", SIGABRT); | |
3094 | #endif | |
3095 | #ifdef SIGEMT | |
3096 | handle_signal ("SIGEMT", SIGEMT); | |
3097 | #endif | |
3098 | #ifdef SIGKILL | |
3099 | handle_signal ("SIGKILL", SIGKILL); | |
3100 | #endif | |
3101 | #ifdef SIGFPE | |
3102 | handle_signal ("SIGFPE", SIGFPE); | |
3103 | #endif | |
3104 | #ifdef SIGBUS | |
3105 | handle_signal ("SIGBUS", SIGBUS); | |
3106 | #endif | |
3107 | #ifdef SIGSEGV | |
3108 | handle_signal ("SIGSEGV", SIGSEGV); | |
3109 | #endif | |
3110 | #ifdef SIGSYS | |
3111 | handle_signal ("SIGSYS", SIGSYS); | |
3112 | #endif | |
3113 | #ifdef SIGPIPE | |
3114 | handle_signal ("SIGPIPE", SIGPIPE); | |
3115 | #endif | |
3116 | #ifdef SIGALRM | |
3117 | handle_signal ("SIGALRM", SIGALRM); | |
3118 | #endif | |
3119 | #ifdef SIGTERM | |
3120 | handle_signal ("SIGTERM", SIGTERM); | |
3121 | #endif | |
3122 | #ifdef SIGURG | |
3123 | handle_signal ("SIGURG", SIGURG); | |
3124 | #endif | |
3125 | #ifdef SIGSTOP | |
3126 | handle_signal ("SIGSTOP", SIGSTOP); | |
3127 | #endif | |
3128 | #ifdef SIGTSTP | |
3129 | handle_signal ("SIGTSTP", SIGTSTP); | |
3130 | #endif | |
3131 | #ifdef SIGCONT | |
3132 | handle_signal ("SIGCONT", SIGCONT); | |
3133 | #endif | |
3134 | #ifdef SIGCHLD | |
3135 | handle_signal ("SIGCHLD", SIGCHLD); | |
3136 | #endif | |
3137 | #ifdef SIGTTIN | |
3138 | handle_signal ("SIGTTIN", SIGTTIN); | |
3139 | #endif | |
3140 | #ifdef SIGTTOU | |
3141 | handle_signal ("SIGTTOU", SIGTTOU); | |
3142 | #endif | |
3143 | #ifdef SIGIO | |
3144 | handle_signal ("SIGIO", SIGIO); | |
3145 | #endif | |
3146 | #ifdef SIGXCPU | |
3147 | handle_signal ("SIGXCPU", SIGXCPU); | |
3148 | #endif | |
3149 | #ifdef SIGXFSZ | |
3150 | handle_signal ("SIGXFSZ", SIGXFSZ); | |
3151 | #endif | |
3152 | #ifdef SIGVTALRM | |
3153 | handle_signal ("SIGVTALRM", SIGVTALRM); | |
3154 | #endif | |
3155 | #ifdef SIGPROF | |
3156 | handle_signal ("SIGPROF", SIGPROF); | |
3157 | #endif | |
3158 | #ifdef SIGWINCH | |
3159 | handle_signal ("SIGWINCH", SIGWINCH); | |
3160 | #endif | |
3161 | #ifdef SIGINFO | |
3162 | handle_signal ("SIGINFO", SIGINFO); | |
3163 | #endif | |
3164 | #ifdef SIGUSR1 | |
3165 | handle_signal ("SIGUSR1", SIGUSR1); | |
3166 | #endif | |
3167 | #ifdef SIGUSR2 | |
3168 | handle_signal ("SIGUSR2", SIGUSR2); | |
3169 | #endif | |
3170 | else | |
9fa195a2 | 3171 | error ("Undefined signal name %s", name); |
4766242d RS |
3172 | } |
3173 | ||
3174 | #undef handle_signal | |
3175 | ||
e98d950b RS |
3176 | #ifdef WINDOWSNT |
3177 | /* Only works for kill-type signals */ | |
4766242d | 3178 | return make_number (win32_kill_process (XINT (pid), XINT (sigcode))); |
e98d950b | 3179 | #else |
4766242d | 3180 | return make_number (kill (XINT (pid), XINT (sigcode))); |
e98d950b | 3181 | #endif |
d0d6b7c5 JB |
3182 | } |
3183 | ||
3184 | DEFUN ("process-send-eof", Fprocess_send_eof, Sprocess_send_eof, 0, 1, 0, | |
3185 | "Make PROCESS see end-of-file in its input.\n\ | |
3186 | Eof comes after any text already sent to it.\n\ | |
ebb9e16f | 3187 | PROCESS may be a process, a buffer, the name of a process or buffer, or\n\ |
d33a00f2 RS |
3188 | nil, indicating the current buffer's process.\n\ |
3189 | If PROCESS is a network connection, or is a process communicating\n\ | |
3190 | through a pipe (as opposed to a pty), then you cannot send any more\n\ | |
3191 | text to PROCESS after you call this function.") | |
d0d6b7c5 JB |
3192 | (process) |
3193 | Lisp_Object process; | |
3194 | { | |
3195 | Lisp_Object proc; | |
3196 | ||
3197 | proc = get_process (process); | |
577d03d5 RS |
3198 | |
3199 | /* Make sure the process is really alive. */ | |
3200 | if (! NILP (XPROCESS (proc)->raw_status_low)) | |
3201 | update_status (XPROCESS (proc)); | |
3202 | if (! EQ (XPROCESS (proc)->status, Qrun)) | |
dcf970e6 | 3203 | error ("Process %s not running", XSTRING (XPROCESS (proc)->name)->data); |
577d03d5 | 3204 | |
d0d6b7c5 | 3205 | #ifdef VMS |
4556b700 | 3206 | send_process (proc, "\032", 1, Qnil); /* ^z */ |
d0d6b7c5 JB |
3207 | #else |
3208 | if (!NILP (XPROCESS (proc)->pty_flag)) | |
4556b700 | 3209 | send_process (proc, "\004", 1, Qnil); |
d0d6b7c5 JB |
3210 | else |
3211 | { | |
a9f2c884 | 3212 | close (XINT (XPROCESS (proc)->outfd)); |
1d056e64 | 3213 | XSETINT (XPROCESS (proc)->outfd, open (NULL_DEVICE, O_WRONLY)); |
d0d6b7c5 JB |
3214 | } |
3215 | #endif /* VMS */ | |
d0d6b7c5 JB |
3216 | return process; |
3217 | } | |
3218 | ||
3219 | /* Kill all processes associated with `buffer'. | |
3220 | If `buffer' is nil, kill all processes */ | |
3221 | ||
3222 | kill_buffer_processes (buffer) | |
3223 | Lisp_Object buffer; | |
3224 | { | |
3225 | Lisp_Object tail, proc; | |
3226 | ||
b5b502d6 | 3227 | for (tail = Vprocess_alist; GC_CONSP (tail); tail = XCONS (tail)->cdr) |
d0d6b7c5 JB |
3228 | { |
3229 | proc = XCONS (XCONS (tail)->car)->cdr; | |
b5b502d6 | 3230 | if (GC_PROCESSP (proc) |
d0d6b7c5 JB |
3231 | && (NILP (buffer) || EQ (XPROCESS (proc)->buffer, buffer))) |
3232 | { | |
3233 | if (NETCONN_P (proc)) | |
e1ab4959 | 3234 | Fdelete_process (proc); |
a9f2c884 | 3235 | else if (XINT (XPROCESS (proc)->infd) >= 0) |
d0d6b7c5 JB |
3236 | process_send_signal (proc, SIGHUP, Qnil, 1); |
3237 | } | |
3238 | } | |
3239 | } | |
3240 | \f | |
3241 | /* On receipt of a signal that a child status has changed, | |
3242 | loop asking about children with changed statuses until | |
3243 | the system says there are no more. | |
3244 | All we do is change the status; | |
3245 | we do not run sentinels or print notifications. | |
3246 | That is saved for the next time keyboard input is done, | |
3247 | in order to avoid timing errors. */ | |
3248 | ||
3249 | /** WARNING: this can be called during garbage collection. | |
3250 | Therefore, it must not be fooled by the presence of mark bits in | |
3251 | Lisp objects. */ | |
3252 | ||
3253 | /** USG WARNING: Although it is not obvious from the documentation | |
3254 | in signal(2), on a USG system the SIGCLD handler MUST NOT call | |
3255 | signal() before executing at least one wait(), otherwise the handler | |
3256 | will be called again, resulting in an infinite loop. The relevant | |
3257 | portion of the documentation reads "SIGCLD signals will be queued | |
3258 | and the signal-catching function will be continually reentered until | |
3259 | the queue is empty". Invoking signal() causes the kernel to reexamine | |
3260 | the SIGCLD queue. Fred Fish, UniSoft Systems Inc. */ | |
3261 | ||
3262 | SIGTYPE | |
3263 | sigchld_handler (signo) | |
3264 | int signo; | |
3265 | { | |
3266 | int old_errno = errno; | |
3267 | Lisp_Object proc; | |
3268 | register struct Lisp_Process *p; | |
6be429b1 | 3269 | extern EMACS_TIME *input_available_clear_time; |
d0d6b7c5 JB |
3270 | |
3271 | #ifdef BSD4_1 | |
3272 | extern int sigheld; | |
3273 | sigheld |= sigbit (SIGCHLD); | |
3274 | #endif | |
3275 | ||
3276 | while (1) | |
3277 | { | |
3278 | register int pid; | |
3279 | WAITTYPE w; | |
3280 | Lisp_Object tail; | |
3281 | ||
3282 | #ifdef WNOHANG | |
3283 | #ifndef WUNTRACED | |
3284 | #define WUNTRACED 0 | |
3285 | #endif /* no WUNTRACED */ | |
3286 | /* Keep trying to get a status until we get a definitive result. */ | |
3287 | do | |
3288 | { | |
3289 | errno = 0; | |
3290 | pid = wait3 (&w, WNOHANG | WUNTRACED, 0); | |
3291 | } | |
3292 | while (pid <= 0 && errno == EINTR); | |
3293 | ||
3294 | if (pid <= 0) | |
3295 | { | |
3296 | /* A real failure. We have done all our job, so return. */ | |
3297 | ||
3298 | /* USG systems forget handlers when they are used; | |
3299 | must reestablish each time */ | |
3300 | #ifdef USG | |
3301 | signal (signo, sigchld_handler); /* WARNING - must come after wait3() */ | |
3302 | #endif | |
3303 | #ifdef BSD4_1 | |
3304 | sigheld &= ~sigbit (SIGCHLD); | |
3305 | sigrelse (SIGCHLD); | |
3306 | #endif | |
3307 | errno = old_errno; | |
3308 | return; | |
3309 | } | |
3310 | #else | |
3311 | pid = wait (&w); | |
3312 | #endif /* no WNOHANG */ | |
3313 | ||
3314 | /* Find the process that signaled us, and record its status. */ | |
3315 | ||
3316 | p = 0; | |
3317 | for (tail = Vprocess_alist; XSYMBOL (tail) != XSYMBOL (Qnil); tail = XCONS (tail)->cdr) | |
3318 | { | |
3319 | proc = XCONS (XCONS (tail)->car)->cdr; | |
3320 | p = XPROCESS (proc); | |
3321 | if (EQ (p->childp, Qt) && XFASTINT (p->pid) == pid) | |
3322 | break; | |
3323 | p = 0; | |
3324 | } | |
3325 | ||
3326 | /* Look for an asynchronous process whose pid hasn't been filled | |
3327 | in yet. */ | |
3328 | if (p == 0) | |
3329 | for (tail = Vprocess_alist; XSYMBOL (tail) != XSYMBOL (Qnil); tail = XCONS (tail)->cdr) | |
3330 | { | |
3331 | proc = XCONS (XCONS (tail)->car)->cdr; | |
3332 | p = XPROCESS (proc); | |
bcd69aea | 3333 | if (INTEGERP (p->pid) && XINT (p->pid) == -1) |
d0d6b7c5 JB |
3334 | break; |
3335 | p = 0; | |
3336 | } | |
3337 | ||
3338 | /* Change the status of the process that was found. */ | |
3339 | if (p != 0) | |
3340 | { | |
3341 | union { int i; WAITTYPE wt; } u; | |
e98d950b | 3342 | int clear_desc_flag = 0; |
d0d6b7c5 JB |
3343 | |
3344 | XSETINT (p->tick, ++process_tick); | |
3345 | u.wt = w; | |
5fc0154c RS |
3346 | XSETINT (p->raw_status_low, u.i & 0xffff); |
3347 | XSETINT (p->raw_status_high, u.i >> 16); | |
d0d6b7c5 JB |
3348 | |
3349 | /* If process has terminated, stop waiting for its output. */ | |
e98d950b RS |
3350 | if ((WIFSIGNALED (w) || WIFEXITED (w)) |
3351 | && XINT (p->infd) >= 0) | |
3352 | clear_desc_flag = 1; | |
3353 | ||
3354 | /* We use clear_desc_flag to avoid a compiler bug in Microsoft C. */ | |
3355 | if (clear_desc_flag) | |
3356 | { | |
3357 | FD_CLR (XINT (p->infd), &input_wait_mask); | |
3358 | FD_CLR (XINT (p->infd), &non_keyboard_wait_mask); | |
3359 | } | |
6be429b1 JB |
3360 | |
3361 | /* Tell wait_reading_process_input that it needs to wake up and | |
3362 | look around. */ | |
3363 | if (input_available_clear_time) | |
3364 | EMACS_SET_SECS_USECS (*input_available_clear_time, 0, 0); | |
d0d6b7c5 JB |
3365 | } |
3366 | ||
3367 | /* There was no asynchronous process found for that id. Check | |
3368 | if we have a synchronous process. */ | |
3369 | else | |
3370 | { | |
3371 | synch_process_alive = 0; | |
3372 | ||
3373 | /* Report the status of the synchronous process. */ | |
3374 | if (WIFEXITED (w)) | |
3375 | synch_process_retcode = WRETCODE (w); | |
3376 | else if (WIFSIGNALED (w)) | |
b97ad9ea RS |
3377 | { |
3378 | int code = WTERMSIG (w); | |
3379 | char *signame = 0; | |
3380 | ||
3381 | if (code < NSIG) | |
3382 | { | |
b0310da4 | 3383 | #ifndef VMS |
ed0cae05 RS |
3384 | /* Suppress warning if the table has const char *. */ |
3385 | signame = (char *) sys_siglist[code]; | |
b0310da4 | 3386 | #else |
b97ad9ea | 3387 | signame = sys_errlist[code]; |
b0310da4 | 3388 | #endif |
b97ad9ea RS |
3389 | } |
3390 | if (signame == 0) | |
3391 | signame = "unknown"; | |
3392 | ||
3393 | synch_process_death = signame; | |
3394 | } | |
6be429b1 JB |
3395 | |
3396 | /* Tell wait_reading_process_input that it needs to wake up and | |
3397 | look around. */ | |
3398 | if (input_available_clear_time) | |
3399 | EMACS_SET_SECS_USECS (*input_available_clear_time, 0, 0); | |
d0d6b7c5 JB |
3400 | } |
3401 | ||
3402 | /* On some systems, we must return right away. | |
3403 | If any more processes want to signal us, we will | |
3404 | get another signal. | |
3405 | Otherwise (on systems that have WNOHANG), loop around | |
3406 | to use up all the processes that have something to tell us. */ | |
e98d950b | 3407 | #if defined (USG) && ! (defined (HPUX) && defined (WNOHANG)) || defined (WINDOWSNT) |
d0d6b7c5 JB |
3408 | #ifdef USG |
3409 | signal (signo, sigchld_handler); | |
3410 | #endif | |
3411 | errno = old_errno; | |
3412 | return; | |
3413 | #endif /* USG, but not HPUX with WNOHANG */ | |
3414 | } | |
3415 | } | |
3416 | \f | |
3417 | ||
3418 | static Lisp_Object | |
3419 | exec_sentinel_unwind (data) | |
3420 | Lisp_Object data; | |
3421 | { | |
3422 | XPROCESS (XCONS (data)->car)->sentinel = XCONS (data)->cdr; | |
3423 | return Qnil; | |
3424 | } | |
3425 | ||
3b9a3dfa RS |
3426 | static Lisp_Object |
3427 | exec_sentinel_error_handler (error) | |
3428 | Lisp_Object error; | |
3429 | { | |
3430 | cmd_error_internal (error, "error in process sentinel: "); | |
3431 | Vinhibit_quit = Qt; | |
3432 | update_echo_area (); | |
833ba342 | 3433 | Fsleep_for (make_number (2), Qnil); |
3b9a3dfa RS |
3434 | } |
3435 | ||
d0d6b7c5 JB |
3436 | static void |
3437 | exec_sentinel (proc, reason) | |
3438 | Lisp_Object proc, reason; | |
3439 | { | |
dfc21838 | 3440 | Lisp_Object sentinel, obuffer, odeactivate, okeymap; |
d0d6b7c5 JB |
3441 | register struct Lisp_Process *p = XPROCESS (proc); |
3442 | int count = specpdl_ptr - specpdl; | |
3443 | ||
dfc21838 RS |
3444 | /* No need to gcpro these, because all we do with them later |
3445 | is test them for EQness, and none of them should be a string. */ | |
8fb3cf64 | 3446 | odeactivate = Vdeactivate_mark; |
dfc21838 RS |
3447 | XSETBUFFER (obuffer, current_buffer); |
3448 | okeymap = current_buffer->keymap; | |
3449 | ||
d0d6b7c5 JB |
3450 | sentinel = p->sentinel; |
3451 | if (NILP (sentinel)) | |
3452 | return; | |
3453 | ||
3454 | /* Zilch the sentinel while it's running, to avoid recursive invocations; | |
3455 | assure that it gets restored no matter how the sentinel exits. */ | |
3456 | p->sentinel = Qnil; | |
3457 | record_unwind_protect (exec_sentinel_unwind, Fcons (proc, sentinel)); | |
3458 | /* Inhibit quit so that random quits don't screw up a running filter. */ | |
3459 | specbind (Qinhibit_quit, Qt); | |
6545aada | 3460 | specbind (Qlast_nonmenu_event, Qt); |
3b9a3dfa | 3461 | |
7074fde6 | 3462 | running_asynch_code = 1; |
3b9a3dfa RS |
3463 | internal_condition_case_1 (read_process_output_call, |
3464 | Fcons (sentinel, | |
3465 | Fcons (proc, Fcons (reason, Qnil))), | |
3466 | !NILP (Vdebug_on_error) ? Qnil : Qerror, | |
3467 | exec_sentinel_error_handler); | |
7074fde6 FP |
3468 | running_asynch_code = 0; |
3469 | restore_match_data (); | |
8fb3cf64 KH |
3470 | |
3471 | Vdeactivate_mark = odeactivate; | |
7973cfa8 | 3472 | #if 0 |
dfc21838 RS |
3473 | if (! EQ (Fcurrent_buffer (), obuffer) |
3474 | || ! EQ (current_buffer->keymap, okeymap)) | |
7973cfa8 | 3475 | #endif |
927e08be RS |
3476 | /* But do it only if the caller is actually going to read events. |
3477 | Otherwise there's no need to make him wake up, and it could | |
3478 | cause trouble (for example it would make Fsit_for return). */ | |
3479 | if (waiting_for_user_input_p == -1) | |
3480 | record_asynch_buffer_change (); | |
8fb3cf64 | 3481 | |
2ea6d561 | 3482 | unbind_to (count, Qnil); |
d0d6b7c5 JB |
3483 | } |
3484 | ||
3485 | /* Report all recent events of a change in process status | |
3486 | (either run the sentinel or output a message). | |
3487 | This is done while Emacs is waiting for keyboard input. */ | |
3488 | ||
3489 | status_notify () | |
3490 | { | |
3491 | register Lisp_Object proc, buffer; | |
2e4149a8 | 3492 | Lisp_Object tail, msg; |
d0d6b7c5 JB |
3493 | struct gcpro gcpro1, gcpro2; |
3494 | ||
2e4149a8 KH |
3495 | tail = Qnil; |
3496 | msg = Qnil; | |
d0d6b7c5 JB |
3497 | /* We need to gcpro tail; if read_process_output calls a filter |
3498 | which deletes a process and removes the cons to which tail points | |
3499 | from Vprocess_alist, and then causes a GC, tail is an unprotected | |
3500 | reference. */ | |
3501 | GCPRO2 (tail, msg); | |
3502 | ||
30623085 RS |
3503 | /* Set this now, so that if new processes are created by sentinels |
3504 | that we run, we get called again to handle their status changes. */ | |
3505 | update_tick = process_tick; | |
3506 | ||
3507 | for (tail = Vprocess_alist; !NILP (tail); tail = Fcdr (tail)) | |
d0d6b7c5 | 3508 | { |
30623085 RS |
3509 | Lisp_Object symbol; |
3510 | register struct Lisp_Process *p; | |
3511 | ||
3512 | proc = Fcdr (Fcar (tail)); | |
3513 | p = XPROCESS (proc); | |
3514 | ||
3515 | if (XINT (p->tick) != XINT (p->update_tick)) | |
d0d6b7c5 | 3516 | { |
30623085 | 3517 | XSETINT (p->update_tick, XINT (p->tick)); |
d0d6b7c5 | 3518 | |
30623085 RS |
3519 | /* If process is still active, read any output that remains. */ |
3520 | if (XINT (p->infd) >= 0) | |
3521 | while (! EQ (p->filter, Qt) | |
3522 | && read_process_output (proc, XINT (p->infd)) > 0); | |
d0d6b7c5 | 3523 | |
30623085 | 3524 | buffer = p->buffer; |
d0d6b7c5 | 3525 | |
30623085 RS |
3526 | /* Get the text to use for the message. */ |
3527 | if (!NILP (p->raw_status_low)) | |
3528 | update_status (p); | |
3529 | msg = status_message (p->status); | |
d0d6b7c5 | 3530 | |
30623085 RS |
3531 | /* If process is terminated, deactivate it or delete it. */ |
3532 | symbol = p->status; | |
3533 | if (CONSP (p->status)) | |
3534 | symbol = XCONS (p->status)->car; | |
d0d6b7c5 | 3535 | |
30623085 RS |
3536 | if (EQ (symbol, Qsignal) || EQ (symbol, Qexit) |
3537 | || EQ (symbol, Qclosed)) | |
3538 | { | |
3539 | if (delete_exited_processes) | |
3540 | remove_process (proc); | |
3541 | else | |
3542 | deactivate_process (proc); | |
3543 | } | |
d0d6b7c5 | 3544 | |
30623085 RS |
3545 | /* Now output the message suitably. */ |
3546 | if (!NILP (p->sentinel)) | |
3547 | exec_sentinel (proc, msg); | |
3548 | /* Don't bother with a message in the buffer | |
3549 | when a process becomes runnable. */ | |
3550 | else if (!EQ (symbol, Qrun) && !NILP (buffer)) | |
3551 | { | |
3552 | Lisp_Object ro, tem; | |
3553 | struct buffer *old = current_buffer; | |
3554 | int opoint; | |
2e4149a8 | 3555 | |
30623085 | 3556 | ro = XBUFFER (buffer)->read_only; |
d0d6b7c5 | 3557 | |
30623085 RS |
3558 | /* Avoid error if buffer is deleted |
3559 | (probably that's why the process is dead, too) */ | |
3560 | if (NILP (XBUFFER (buffer)->name)) | |
3561 | continue; | |
3562 | Fset_buffer (buffer); | |
3563 | opoint = point; | |
3564 | /* Insert new output into buffer | |
3565 | at the current end-of-output marker, | |
3566 | thus preserving logical ordering of input and output. */ | |
3567 | if (XMARKER (p->mark)->buffer) | |
3568 | SET_PT (marker_position (p->mark)); | |
3569 | else | |
3570 | SET_PT (ZV); | |
3571 | if (point <= opoint) | |
3572 | opoint += XSTRING (msg)->size + XSTRING (p->name)->size + 10; | |
3573 | ||
3574 | tem = current_buffer->read_only; | |
3575 | current_buffer->read_only = Qnil; | |
3576 | insert_string ("\nProcess "); | |
3577 | Finsert (1, &p->name); | |
3578 | insert_string (" "); | |
3579 | Finsert (1, &msg); | |
3580 | current_buffer->read_only = tem; | |
3581 | Fset_marker (p->mark, make_number (point), p->buffer); | |
3582 | ||
3583 | SET_PT (opoint); | |
3584 | set_buffer_internal (old); | |
d0d6b7c5 | 3585 | } |
30623085 RS |
3586 | } |
3587 | } /* end for */ | |
d0d6b7c5 JB |
3588 | |
3589 | update_mode_lines++; /* in case buffers use %s in mode-line-format */ | |
3590 | redisplay_preserve_echo_area (); | |
3591 | ||
d0d6b7c5 JB |
3592 | UNGCPRO; |
3593 | } | |
3594 | \f | |
a69281ff RS |
3595 | /* The first time this is called, assume keyboard input comes from DESC |
3596 | instead of from where we used to expect it. | |
3597 | Subsequent calls mean assume input keyboard can come from DESC | |
3598 | in addition to other places. */ | |
3599 | ||
3600 | static int add_keyboard_wait_descriptor_called_flag; | |
3601 | ||
3602 | void | |
3603 | add_keyboard_wait_descriptor (desc) | |
3604 | int desc; | |
3605 | { | |
3606 | if (! add_keyboard_wait_descriptor_called_flag) | |
3607 | FD_CLR (0, &input_wait_mask); | |
3608 | add_keyboard_wait_descriptor_called_flag = 1; | |
3609 | FD_SET (desc, &input_wait_mask); | |
3610 | if (desc > max_keyboard_desc) | |
3611 | max_keyboard_desc = desc; | |
3612 | } | |
3613 | ||
3614 | /* From now on, do not expect DESC to give keyboard input. */ | |
3615 | ||
3616 | void | |
3617 | delete_keyboard_wait_descriptor (desc) | |
3618 | int desc; | |
3619 | { | |
3620 | int fd; | |
3621 | int lim = max_keyboard_desc; | |
3622 | ||
3623 | FD_CLR (desc, &input_wait_mask); | |
3624 | ||
3625 | if (desc == max_keyboard_desc) | |
3626 | for (fd = 0; fd < lim; fd++) | |
3627 | if (FD_ISSET (fd, &input_wait_mask) | |
3628 | && !FD_ISSET (fd, &non_keyboard_wait_mask)) | |
3629 | max_keyboard_desc = fd; | |
3630 | } | |
3631 | ||
3632 | /* Return nonzero if *MASK has a bit set | |
3633 | that corresponds to one of the keyboard input descriptors. */ | |
3634 | ||
3635 | int | |
3636 | keyboard_bit_set (mask) | |
3637 | SELECT_TYPE *mask; | |
3638 | { | |
3639 | int fd; | |
3640 | ||
ee8e09af | 3641 | for (fd = 0; fd <= max_keyboard_desc; fd++) |
a69281ff RS |
3642 | if (FD_ISSET (fd, mask) && FD_ISSET (fd, &input_wait_mask) |
3643 | && !FD_ISSET (fd, &non_keyboard_wait_mask)) | |
3644 | return 1; | |
3645 | ||
3646 | return 0; | |
3647 | } | |
3648 | \f | |
d0d6b7c5 JB |
3649 | init_process () |
3650 | { | |
3651 | register int i; | |
3652 | ||
3653 | #ifdef SIGCHLD | |
3654 | #ifndef CANNOT_DUMP | |
3655 | if (! noninteractive || initialized) | |
3656 | #endif | |
3657 | signal (SIGCHLD, sigchld_handler); | |
3658 | #endif | |
3659 | ||
3660 | FD_ZERO (&input_wait_mask); | |
a69281ff | 3661 | FD_ZERO (&non_keyboard_wait_mask); |
7d0e672e | 3662 | max_process_desc = 0; |
dd2281ae | 3663 | |
a69281ff | 3664 | FD_SET (0, &input_wait_mask); |
dd2281ae | 3665 | |
d0d6b7c5 JB |
3666 | Vprocess_alist = Qnil; |
3667 | for (i = 0; i < MAXDESC; i++) | |
3668 | { | |
3669 | chan_process[i] = Qnil; | |
3670 | proc_buffered_char[i] = -1; | |
3671 | } | |
3672 | } | |
312c9964 | 3673 | |
d0d6b7c5 JB |
3674 | syms_of_process () |
3675 | { | |
d0d6b7c5 JB |
3676 | #ifdef HAVE_SOCKETS |
3677 | stream_process = intern ("stream"); | |
3678 | #endif | |
3679 | Qprocessp = intern ("processp"); | |
3680 | staticpro (&Qprocessp); | |
3681 | Qrun = intern ("run"); | |
3682 | staticpro (&Qrun); | |
3683 | Qstop = intern ("stop"); | |
3684 | staticpro (&Qstop); | |
3685 | Qsignal = intern ("signal"); | |
3686 | staticpro (&Qsignal); | |
3687 | ||
3688 | /* Qexit is already staticpro'd by syms_of_eval; don't staticpro it | |
3689 | here again. | |
3690 | ||
3691 | Qexit = intern ("exit"); | |
3692 | staticpro (&Qexit); */ | |
3693 | ||
3694 | Qopen = intern ("open"); | |
3695 | staticpro (&Qopen); | |
3696 | Qclosed = intern ("closed"); | |
3697 | staticpro (&Qclosed); | |
3698 | ||
6545aada RS |
3699 | Qlast_nonmenu_event = intern ("last-nonmenu-event"); |
3700 | staticpro (&Qlast_nonmenu_event); | |
3701 | ||
d0d6b7c5 JB |
3702 | staticpro (&Vprocess_alist); |
3703 | ||
3704 | DEFVAR_BOOL ("delete-exited-processes", &delete_exited_processes, | |
3705 | "*Non-nil means delete processes immediately when they exit.\n\ | |
3706 | nil means don't delete them until `list-processes' is run."); | |
3707 | ||
3708 | delete_exited_processes = 1; | |
3709 | ||
3710 | DEFVAR_LISP ("process-connection-type", &Vprocess_connection_type, | |
3711 | "Control type of device used to communicate with subprocesses.\n\ | |
e333e864 RS |
3712 | Values are nil to use a pipe, or t or `pty' to use a pty.\n\ |
3713 | The value has no effect if the system has no ptys or if all ptys are busy:\n\ | |
3714 | then a pipe is used in any case.\n\ | |
3715 | The value takes effect when `start-process' is called."); | |
d0d6b7c5 JB |
3716 | Vprocess_connection_type = Qt; |
3717 | ||
3718 | defsubr (&Sprocessp); | |
3719 | defsubr (&Sget_process); | |
3720 | defsubr (&Sget_buffer_process); | |
3721 | defsubr (&Sdelete_process); | |
3722 | defsubr (&Sprocess_status); | |
3723 | defsubr (&Sprocess_exit_status); | |
3724 | defsubr (&Sprocess_id); | |
3725 | defsubr (&Sprocess_name); | |
3b9a3dfa | 3726 | defsubr (&Sprocess_tty_name); |
d0d6b7c5 JB |
3727 | defsubr (&Sprocess_command); |
3728 | defsubr (&Sset_process_buffer); | |
3729 | defsubr (&Sprocess_buffer); | |
3730 | defsubr (&Sprocess_mark); | |
3731 | defsubr (&Sset_process_filter); | |
3732 | defsubr (&Sprocess_filter); | |
3733 | defsubr (&Sset_process_sentinel); | |
396df322 | 3734 | defsubr (&Sset_process_window_size); |
d0d6b7c5 JB |
3735 | defsubr (&Sprocess_sentinel); |
3736 | defsubr (&Sprocess_kill_without_query); | |
3737 | defsubr (&Slist_processes); | |
3738 | defsubr (&Sprocess_list); | |
3739 | defsubr (&Sstart_process); | |
3740 | #ifdef HAVE_SOCKETS | |
3741 | defsubr (&Sopen_network_stream); | |
3742 | #endif /* HAVE_SOCKETS */ | |
3743 | defsubr (&Saccept_process_output); | |
3744 | defsubr (&Sprocess_send_region); | |
3745 | defsubr (&Sprocess_send_string); | |
3746 | defsubr (&Sinterrupt_process); | |
3747 | defsubr (&Skill_process); | |
3748 | defsubr (&Squit_process); | |
3749 | defsubr (&Sstop_process); | |
3750 | defsubr (&Scontinue_process); | |
3751 | defsubr (&Sprocess_send_eof); | |
3752 | defsubr (&Ssignal_process); | |
3753 | defsubr (&Swaiting_for_user_input_p); | |
3754 | /* defsubr (&Sprocess_connection); */ | |
3755 | } | |
3756 | ||
6720a7fb JB |
3757 | \f |
3758 | #else /* not subprocesses */ | |
3759 | ||
3760 | #include <sys/types.h> | |
3761 | #include <errno.h> | |
3762 | ||
3763 | #include "lisp.h" | |
3764 | #include "systime.h" | |
3765 | #include "termopts.h" | |
81afb6d1 | 3766 | #include "sysselect.h" |
6720a7fb | 3767 | |
ff11dfa1 | 3768 | extern int frame_garbaged; |
6720a7fb JB |
3769 | |
3770 | ||
3771 | /* As described above, except assuming that there are no subprocesses: | |
3772 | ||
3773 | Wait for timeout to elapse and/or keyboard input to be available. | |
3774 | ||
3775 | time_limit is: | |
3776 | timeout in seconds, or | |
3777 | zero for no limit, or | |
3778 | -1 means gobble data immediately available but don't wait for any. | |
3779 | ||
f76475ad | 3780 | read_kbd is a Lisp_Object: |
6720a7fb JB |
3781 | 0 to ignore keyboard input, or |
3782 | 1 to return when input is available, or | |
3783 | -1 means caller will actually read the input, so don't throw to | |
3784 | the quit handler. | |
3785 | We know that read_kbd will never be a Lisp_Process, since | |
3786 | `subprocesses' isn't defined. | |
3787 | ||
3788 | do_display != 0 means redisplay should be done to show subprocess | |
5164ee8e | 3789 | output that arrives. |
6720a7fb | 3790 | |
eb8c3be9 | 3791 | Return true iff we received input from any process. */ |
6720a7fb JB |
3792 | |
3793 | int | |
3794 | wait_reading_process_input (time_limit, microsecs, read_kbd, do_display) | |
f76475ad JB |
3795 | int time_limit, microsecs; |
3796 | Lisp_Object read_kbd; | |
3797 | int do_display; | |
6720a7fb JB |
3798 | { |
3799 | EMACS_TIME end_time, timeout, *timeout_p; | |
8db121c4 | 3800 | SELECT_TYPE waitchannels; |
6720a7fb JB |
3801 | |
3802 | /* What does time_limit really mean? */ | |
3803 | if (time_limit || microsecs) | |
3804 | { | |
3805 | /* It's not infinite. */ | |
3806 | timeout_p = &timeout; | |
3807 | ||
3808 | if (time_limit == -1) | |
3809 | /* In fact, it's zero. */ | |
3810 | EMACS_SET_SECS_USECS (timeout, 0, 0); | |
3811 | else | |
3812 | EMACS_SET_SECS_USECS (timeout, time_limit, microsecs); | |
3813 | ||
3814 | /* How far in the future is that? */ | |
3815 | EMACS_GET_TIME (end_time); | |
3816 | EMACS_ADD_TIME (end_time, end_time, timeout); | |
3817 | } | |
3818 | else | |
3819 | /* It's infinite. */ | |
3820 | timeout_p = 0; | |
3821 | ||
3822 | /* Turn off periodic alarms (in case they are in use) | |
3823 | because the select emulator uses alarms. */ | |
3824 | stop_polling (); | |
3825 | ||
3826 | for (;;) | |
3827 | { | |
3828 | int nfds; | |
3829 | ||
8db121c4 KH |
3830 | if (XINT (read_kbd)) |
3831 | FD_SET (0, &waitchannels); | |
3832 | else | |
3833 | FD_ZERO (&waitchannels); | |
6720a7fb JB |
3834 | |
3835 | /* If calling from keyboard input, do not quit | |
3836 | since we want to return C-g as an input character. | |
3837 | Otherwise, do pending quit if requested. */ | |
f76475ad | 3838 | if (XINT (read_kbd) >= 0) |
6720a7fb JB |
3839 | QUIT; |
3840 | ||
3841 | if (timeout_p) | |
3842 | { | |
3843 | EMACS_GET_TIME (*timeout_p); | |
3844 | EMACS_SUB_TIME (*timeout_p, end_time, *timeout_p); | |
3845 | if (EMACS_TIME_NEG_P (*timeout_p)) | |
3846 | break; | |
3847 | } | |
3848 | ||
3849 | /* Cause C-g and alarm signals to take immediate action, | |
3850 | and cause input available signals to zero out timeout. */ | |
f76475ad | 3851 | if (XINT (read_kbd) < 0) |
6720a7fb JB |
3852 | set_waiting_for_input (&timeout); |
3853 | ||
ff11dfa1 | 3854 | /* If a frame has been newly mapped and needs updating, |
6720a7fb | 3855 | reprocess its display stuff. */ |
5164ee8e | 3856 | if (frame_garbaged && do_display) |
6720a7fb JB |
3857 | redisplay_preserve_echo_area (); |
3858 | ||
f76475ad | 3859 | if (XINT (read_kbd) && detect_input_pending ()) |
6720a7fb JB |
3860 | nfds = 0; |
3861 | else | |
ecd1f654 KH |
3862 | nfds = select (1, &waitchannels, (SELECT_TYPE *)0, (SELECT_TYPE *)0, |
3863 | timeout_p); | |
6720a7fb JB |
3864 | |
3865 | /* Make C-g and alarm signals set flags again */ | |
3866 | clear_waiting_for_input (); | |
3867 | ||
3868 | /* If we woke up due to SIGWINCH, actually change size now. */ | |
3869 | do_pending_window_change (); | |
3870 | ||
3871 | if (nfds == -1) | |
3872 | { | |
3873 | /* If the system call was interrupted, then go around the | |
3874 | loop again. */ | |
3875 | if (errno == EINTR) | |
8db121c4 | 3876 | FD_ZERO (&waitchannels); |
6720a7fb JB |
3877 | } |
3878 | #ifdef sun | |
3879 | else if (nfds > 0 && (waitchannels & 1) && interrupt_input) | |
3880 | /* System sometimes fails to deliver SIGIO. */ | |
3881 | kill (getpid (), SIGIO); | |
3882 | #endif | |
7324d660 | 3883 | #ifdef SIGIO |
f76475ad | 3884 | if (XINT (read_kbd) && interrupt_input && (waitchannels & 1)) |
6720a7fb | 3885 | kill (0, SIGIO); |
7324d660 | 3886 | #endif |
6720a7fb JB |
3887 | |
3888 | /* If we have timed out (nfds == 0) or found some input (nfds > 0), | |
3889 | we should exit. */ | |
3890 | if (nfds >= 0) | |
3891 | break; | |
3892 | } | |
3893 | ||
a87b802f JB |
3894 | start_polling (); |
3895 | ||
6720a7fb JB |
3896 | return 0; |
3897 | } | |
3898 | ||
3899 | ||
3900 | DEFUN ("get-buffer-process", Fget_buffer_process, Sget_buffer_process, 1, 1, 0, | |
51ab806a | 3901 | /* Don't confuse make-docfile by having two doc strings for this function. |
312c9964 RS |
3902 | make-docfile does not pay attention to #if, for good reason! */ |
3903 | 0) | |
6720a7fb JB |
3904 | (name) |
3905 | register Lisp_Object name; | |
3906 | { | |
3907 | return Qnil; | |
3908 | } | |
3909 | ||
3910 | /* Kill all processes associated with `buffer'. | |
3911 | If `buffer' is nil, kill all processes. | |
3912 | Since we have no subprocesses, this does nothing. */ | |
3913 | ||
3914 | kill_buffer_processes (buffer) | |
3915 | Lisp_Object buffer; | |
3916 | { | |
3917 | } | |
3918 | ||
3919 | init_process () | |
3920 | { | |
3921 | } | |
3922 | ||
3923 | syms_of_process () | |
3924 | { | |
3925 | defsubr (&Sget_buffer_process); | |
3926 | } | |
3927 | ||
3928 | \f | |
3929 | #endif /* not subprocesses */ |