Commit | Line | Data |
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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 | ||
6df54671 | 76 | #if defined(BSD_SYSTEM) || defined(STRIDE) |
d0d6b7c5 | 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 */ | |
6df54671 | 81 | #endif /* BSD_SYSTEM || 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" | |
0fa1789e KH |
101 | #include "charset.h" |
102 | #include "coding.h" | |
d0d6b7c5 JB |
103 | #include "process.h" |
104 | #include "termhooks.h" | |
105 | #include "termopts.h" | |
106 | #include "commands.h" | |
1dc77cc3 | 107 | #include "frame.h" |
ececcbec | 108 | #include "blockinput.h" |
d0d6b7c5 | 109 | |
dd2281ae | 110 | Lisp_Object Qprocessp; |
d0d6b7c5 | 111 | Lisp_Object Qrun, Qstop, Qsignal, Qopen, Qclosed; |
6545aada | 112 | Lisp_Object Qlast_nonmenu_event; |
d0d6b7c5 JB |
113 | /* Qexit is declared and initialized in eval.c. */ |
114 | ||
115 | /* a process object is a network connection when its childp field is neither | |
de282a05 | 116 | Qt nor Qnil but is instead a cons cell (HOSTNAME PORTNUM). */ |
d0d6b7c5 JB |
117 | |
118 | #ifdef HAVE_SOCKETS | |
de282a05 | 119 | #define NETCONN_P(p) (GC_CONSP (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 | ||
b5dc1c83 RS |
227 | /* Mask that excludes process input descriptor (s). */ |
228 | ||
229 | static SELECT_TYPE non_process_wait_mask; | |
230 | ||
7d0e672e RS |
231 | /* The largest descriptor currently in use for a process object. */ |
232 | static int max_process_desc; | |
233 | ||
a69281ff RS |
234 | /* The largest descriptor currently in use for keyboard input. */ |
235 | static int max_keyboard_desc; | |
d0d6b7c5 | 236 | |
dd2281ae RS |
237 | /* Nonzero means delete a process right away if it exits. */ |
238 | static int delete_exited_processes; | |
d0d6b7c5 JB |
239 | |
240 | /* Indexed by descriptor, gives the process (if any) for that descriptor */ | |
41f3aa98 | 241 | Lisp_Object chan_process[MAXDESC]; |
d0d6b7c5 JB |
242 | |
243 | /* Alist of elements (NAME . PROCESS) */ | |
41f3aa98 | 244 | Lisp_Object Vprocess_alist; |
d0d6b7c5 JB |
245 | |
246 | /* Buffered-ahead input char from process, indexed by channel. | |
247 | -1 means empty (no char is buffered). | |
248 | Used on sys V where the only way to tell if there is any | |
249 | output from the process is to read at least one char. | |
250 | Always -1 on systems that support FIONREAD. */ | |
251 | ||
e98d950b RS |
252 | /* Don't make static; need to access externally. */ |
253 | int proc_buffered_char[MAXDESC]; | |
dd2281ae | 254 | |
0fa1789e | 255 | /* Table of `struct coding-system' for each process. */ |
c7580538 KH |
256 | static struct coding_system *proc_decode_coding_system[MAXDESC]; |
257 | static struct coding_system *proc_encode_coding_system[MAXDESC]; | |
0fa1789e | 258 | |
dd2281ae | 259 | static Lisp_Object get_process (); |
93b4f699 | 260 | |
fb4c3627 | 261 | extern EMACS_TIME timer_check (); |
5de50bfb | 262 | extern int timers_run; |
fb4c3627 | 263 | |
93b4f699 RS |
264 | /* Maximum number of bytes to send to a pty without an eof. */ |
265 | static int pty_max_bytes; | |
3b9a3dfa | 266 | |
875e6b94 KH |
267 | #ifdef HAVE_PTYS |
268 | /* The file name of the pty opened by allocate_pty. */ | |
3b9a3dfa RS |
269 | |
270 | static char pty_name[24]; | |
875e6b94 | 271 | #endif |
d0d6b7c5 JB |
272 | \f |
273 | /* Compute the Lisp form of the process status, p->status, from | |
274 | the numeric status that was returned by `wait'. */ | |
275 | ||
f9738840 JB |
276 | Lisp_Object status_convert (); |
277 | ||
d0d6b7c5 JB |
278 | update_status (p) |
279 | struct Lisp_Process *p; | |
280 | { | |
281 | union { int i; WAITTYPE wt; } u; | |
282 | u.i = XFASTINT (p->raw_status_low) + (XFASTINT (p->raw_status_high) << 16); | |
283 | p->status = status_convert (u.wt); | |
284 | p->raw_status_low = Qnil; | |
285 | p->raw_status_high = Qnil; | |
286 | } | |
287 | ||
91d10fa8 | 288 | /* Convert a process status word in Unix format to |
d0d6b7c5 JB |
289 | the list that we use internally. */ |
290 | ||
291 | Lisp_Object | |
292 | status_convert (w) | |
293 | WAITTYPE w; | |
294 | { | |
295 | if (WIFSTOPPED (w)) | |
296 | return Fcons (Qstop, Fcons (make_number (WSTOPSIG (w)), Qnil)); | |
297 | else if (WIFEXITED (w)) | |
298 | return Fcons (Qexit, Fcons (make_number (WRETCODE (w)), | |
299 | WCOREDUMP (w) ? Qt : Qnil)); | |
300 | else if (WIFSIGNALED (w)) | |
301 | return Fcons (Qsignal, Fcons (make_number (WTERMSIG (w)), | |
302 | WCOREDUMP (w) ? Qt : Qnil)); | |
303 | else | |
304 | return Qrun; | |
305 | } | |
306 | ||
307 | /* Given a status-list, extract the three pieces of information | |
308 | and store them individually through the three pointers. */ | |
309 | ||
310 | void | |
311 | decode_status (l, symbol, code, coredump) | |
312 | Lisp_Object l; | |
313 | Lisp_Object *symbol; | |
314 | int *code; | |
315 | int *coredump; | |
316 | { | |
317 | Lisp_Object tem; | |
318 | ||
bcd69aea | 319 | if (SYMBOLP (l)) |
d0d6b7c5 JB |
320 | { |
321 | *symbol = l; | |
322 | *code = 0; | |
323 | *coredump = 0; | |
324 | } | |
325 | else | |
326 | { | |
327 | *symbol = XCONS (l)->car; | |
328 | tem = XCONS (l)->cdr; | |
329 | *code = XFASTINT (XCONS (tem)->car); | |
f9738840 | 330 | tem = XCONS (tem)->cdr; |
d0d6b7c5 JB |
331 | *coredump = !NILP (tem); |
332 | } | |
333 | } | |
334 | ||
335 | /* Return a string describing a process status list. */ | |
336 | ||
337 | Lisp_Object | |
338 | status_message (status) | |
339 | Lisp_Object status; | |
340 | { | |
341 | Lisp_Object symbol; | |
342 | int code, coredump; | |
343 | Lisp_Object string, string2; | |
344 | ||
345 | decode_status (status, &symbol, &code, &coredump); | |
346 | ||
347 | if (EQ (symbol, Qsignal) || EQ (symbol, Qstop)) | |
348 | { | |
b97ad9ea RS |
349 | char *signame = 0; |
350 | if (code < NSIG) | |
351 | { | |
b0310da4 | 352 | #ifndef VMS |
ed0cae05 RS |
353 | /* Cast to suppress warning if the table has const char *. */ |
354 | signame = (char *) sys_siglist[code]; | |
b0310da4 | 355 | #else |
b97ad9ea | 356 | signame = sys_errlist[code]; |
b0310da4 | 357 | #endif |
b97ad9ea RS |
358 | } |
359 | if (signame == 0) | |
360 | signame = "unknown"; | |
361 | string = build_string (signame); | |
d0d6b7c5 JB |
362 | string2 = build_string (coredump ? " (core dumped)\n" : "\n"); |
363 | XSTRING (string)->data[0] = DOWNCASE (XSTRING (string)->data[0]); | |
364 | return concat2 (string, string2); | |
365 | } | |
366 | else if (EQ (symbol, Qexit)) | |
367 | { | |
368 | if (code == 0) | |
369 | return build_string ("finished\n"); | |
f2980264 | 370 | string = Fnumber_to_string (make_number (code)); |
d0d6b7c5 JB |
371 | string2 = build_string (coredump ? " (core dumped)\n" : "\n"); |
372 | return concat2 (build_string ("exited abnormally with code "), | |
373 | concat2 (string, string2)); | |
374 | } | |
375 | else | |
376 | return Fcopy_sequence (Fsymbol_name (symbol)); | |
377 | } | |
378 | \f | |
379 | #ifdef HAVE_PTYS | |
d0d6b7c5 | 380 | |
875e6b94 KH |
381 | /* Open an available pty, returning a file descriptor. |
382 | Return -1 on failure. | |
383 | The file name of the terminal corresponding to the pty | |
384 | is left in the variable pty_name. */ | |
385 | ||
d0d6b7c5 JB |
386 | int |
387 | allocate_pty () | |
388 | { | |
389 | struct stat stb; | |
390 | register c, i; | |
391 | int fd; | |
392 | ||
32676c08 JB |
393 | /* Some systems name their pseudoterminals so that there are gaps in |
394 | the usual sequence - for example, on HP9000/S700 systems, there | |
395 | are no pseudoterminals with names ending in 'f'. So we wait for | |
396 | three failures in a row before deciding that we've reached the | |
397 | end of the ptys. */ | |
398 | int failed_count = 0; | |
399 | ||
d0d6b7c5 JB |
400 | #ifdef PTY_ITERATION |
401 | PTY_ITERATION | |
402 | #else | |
403 | for (c = FIRST_PTY_LETTER; c <= 'z'; c++) | |
404 | for (i = 0; i < 16; i++) | |
405 | #endif | |
406 | { | |
407 | #ifdef PTY_NAME_SPRINTF | |
408 | PTY_NAME_SPRINTF | |
d0d6b7c5 JB |
409 | #else |
410 | sprintf (pty_name, "/dev/pty%c%x", c, i); | |
d0d6b7c5 JB |
411 | #endif /* no PTY_NAME_SPRINTF */ |
412 | ||
4d7c105e RS |
413 | #ifdef PTY_OPEN |
414 | PTY_OPEN; | |
415 | #else /* no PTY_OPEN */ | |
32676c08 JB |
416 | #ifdef IRIS |
417 | /* Unusual IRIS code */ | |
418 | *ptyv = open ("/dev/ptc", O_RDWR | O_NDELAY, 0); | |
419 | if (fd < 0) | |
420 | return -1; | |
421 | if (fstat (fd, &stb) < 0) | |
d0d6b7c5 | 422 | return -1; |
4d7c105e | 423 | #else /* not IRIS */ |
32676c08 JB |
424 | if (stat (pty_name, &stb) < 0) |
425 | { | |
426 | failed_count++; | |
427 | if (failed_count >= 3) | |
428 | return -1; | |
429 | } | |
430 | else | |
431 | failed_count = 0; | |
d0d6b7c5 JB |
432 | #ifdef O_NONBLOCK |
433 | fd = open (pty_name, O_RDWR | O_NONBLOCK, 0); | |
434 | #else | |
435 | fd = open (pty_name, O_RDWR | O_NDELAY, 0); | |
436 | #endif | |
4d7c105e RS |
437 | #endif /* not IRIS */ |
438 | #endif /* no PTY_OPEN */ | |
d0d6b7c5 JB |
439 | |
440 | if (fd >= 0) | |
441 | { | |
442 | /* check to make certain that both sides are available | |
443 | this avoids a nasty yet stupid bug in rlogins */ | |
444 | #ifdef PTY_TTY_NAME_SPRINTF | |
445 | PTY_TTY_NAME_SPRINTF | |
d0d6b7c5 JB |
446 | #else |
447 | sprintf (pty_name, "/dev/tty%c%x", c, i); | |
d0d6b7c5 JB |
448 | #endif /* no PTY_TTY_NAME_SPRINTF */ |
449 | #ifndef UNIPLUS | |
450 | if (access (pty_name, 6) != 0) | |
451 | { | |
452 | close (fd); | |
fad97cbe | 453 | #if !defined(IRIS) && !defined(__sgi) |
d0d6b7c5 JB |
454 | continue; |
455 | #else | |
456 | return -1; | |
457 | #endif /* IRIS */ | |
458 | } | |
459 | #endif /* not UNIPLUS */ | |
460 | setup_pty (fd); | |
461 | return fd; | |
462 | } | |
463 | } | |
464 | return -1; | |
465 | } | |
466 | #endif /* HAVE_PTYS */ | |
467 | \f | |
468 | Lisp_Object | |
469 | make_process (name) | |
470 | Lisp_Object name; | |
471 | { | |
23d6bb9c | 472 | struct Lisp_Vector *vec; |
d0d6b7c5 JB |
473 | register Lisp_Object val, tem, name1; |
474 | register struct Lisp_Process *p; | |
475 | char suffix[10]; | |
476 | register int i; | |
477 | ||
23d6bb9c KH |
478 | vec = allocate_vectorlike ((EMACS_INT) VECSIZE (struct Lisp_Process)); |
479 | for (i = 0; i < VECSIZE (struct Lisp_Process); i++) | |
480 | vec->contents[i] = Qnil; | |
481 | vec->size = VECSIZE (struct Lisp_Process); | |
482 | p = (struct Lisp_Process *)vec; | |
483 | ||
1d056e64 KH |
484 | XSETINT (p->infd, -1); |
485 | XSETINT (p->outfd, -1); | |
22719df2 KH |
486 | XSETFASTINT (p->pid, 0); |
487 | XSETFASTINT (p->tick, 0); | |
488 | XSETFASTINT (p->update_tick, 0); | |
d0d6b7c5 JB |
489 | p->raw_status_low = Qnil; |
490 | p->raw_status_high = Qnil; | |
491 | p->status = Qrun; | |
492 | p->mark = Fmake_marker (); | |
493 | ||
494 | /* If name is already in use, modify it until it is unused. */ | |
495 | ||
496 | name1 = name; | |
497 | for (i = 1; ; i++) | |
498 | { | |
499 | tem = Fget_process (name1); | |
500 | if (NILP (tem)) break; | |
501 | sprintf (suffix, "<%d>", i); | |
502 | name1 = concat2 (name, build_string (suffix)); | |
503 | } | |
504 | name = name1; | |
505 | p->name = name; | |
23d6bb9c | 506 | XSETPROCESS (val, p); |
d0d6b7c5 JB |
507 | Vprocess_alist = Fcons (Fcons (name, val), Vprocess_alist); |
508 | return val; | |
509 | } | |
510 | ||
511 | remove_process (proc) | |
512 | register Lisp_Object proc; | |
513 | { | |
514 | register Lisp_Object pair; | |
515 | ||
516 | pair = Frassq (proc, Vprocess_alist); | |
517 | Vprocess_alist = Fdelq (pair, Vprocess_alist); | |
d0d6b7c5 JB |
518 | |
519 | deactivate_process (proc); | |
520 | } | |
521 | \f | |
522 | DEFUN ("processp", Fprocessp, Sprocessp, 1, 1, 0, | |
523 | "Return t if OBJECT is a process.") | |
4ee3e309 EN |
524 | (object) |
525 | Lisp_Object object; | |
d0d6b7c5 | 526 | { |
4ee3e309 | 527 | return PROCESSP (object) ? Qt : Qnil; |
d0d6b7c5 JB |
528 | } |
529 | ||
530 | DEFUN ("get-process", Fget_process, Sget_process, 1, 1, 0, | |
531 | "Return the process named NAME, or nil if there is none.") | |
532 | (name) | |
533 | register Lisp_Object name; | |
534 | { | |
bcd69aea | 535 | if (PROCESSP (name)) |
d0d6b7c5 JB |
536 | return name; |
537 | CHECK_STRING (name, 0); | |
538 | return Fcdr (Fassoc (name, Vprocess_alist)); | |
539 | } | |
540 | ||
541 | DEFUN ("get-buffer-process", Fget_buffer_process, Sget_buffer_process, 1, 1, 0, | |
542 | "Return the (or, a) process associated with BUFFER.\n\ | |
543 | BUFFER may be a buffer or the name of one.") | |
4ee3e309 EN |
544 | (buffer) |
545 | register Lisp_Object buffer; | |
d0d6b7c5 JB |
546 | { |
547 | register Lisp_Object buf, tail, proc; | |
548 | ||
4ee3e309 EN |
549 | if (NILP (buffer)) return Qnil; |
550 | buf = Fget_buffer (buffer); | |
d0d6b7c5 JB |
551 | if (NILP (buf)) return Qnil; |
552 | ||
553 | for (tail = Vprocess_alist; !NILP (tail); tail = Fcdr (tail)) | |
554 | { | |
555 | proc = Fcdr (Fcar (tail)); | |
bcd69aea | 556 | if (PROCESSP (proc) && EQ (XPROCESS (proc)->buffer, buf)) |
d0d6b7c5 JB |
557 | return proc; |
558 | } | |
559 | return Qnil; | |
560 | } | |
561 | ||
ebb9e16f JB |
562 | /* This is how commands for the user decode process arguments. It |
563 | accepts a process, a process name, a buffer, a buffer name, or nil. | |
564 | Buffers denote the first process in the buffer, and nil denotes the | |
565 | current buffer. */ | |
d0d6b7c5 | 566 | |
77b221b1 | 567 | static Lisp_Object |
d0d6b7c5 JB |
568 | get_process (name) |
569 | register Lisp_Object name; | |
570 | { | |
1619761d KH |
571 | register Lisp_Object proc, obj; |
572 | if (STRINGP (name)) | |
573 | { | |
574 | obj = Fget_process (name); | |
575 | if (NILP (obj)) | |
576 | obj = Fget_buffer (name); | |
577 | if (NILP (obj)) | |
578 | error ("Process %s does not exist", XSTRING (name)->data); | |
579 | } | |
580 | else if (NILP (name)) | |
581 | obj = Fcurrent_buffer (); | |
d0d6b7c5 | 582 | else |
1619761d KH |
583 | obj = name; |
584 | ||
585 | /* Now obj should be either a buffer object or a process object. | |
586 | */ | |
587 | if (BUFFERP (obj)) | |
d0d6b7c5 | 588 | { |
1619761d | 589 | proc = Fget_buffer_process (obj); |
d0d6b7c5 | 590 | if (NILP (proc)) |
1619761d | 591 | error ("Buffer %s has no process", XSTRING (XBUFFER (obj)->name)->data); |
d0d6b7c5 | 592 | } |
d0d6b7c5 | 593 | else |
1619761d KH |
594 | { |
595 | CHECK_PROCESS (obj, 0); | |
596 | proc = obj; | |
597 | } | |
598 | return proc; | |
d0d6b7c5 JB |
599 | } |
600 | ||
601 | DEFUN ("delete-process", Fdelete_process, Sdelete_process, 1, 1, 0, | |
602 | "Delete PROCESS: kill it and forget about it immediately.\n\ | |
ebb9e16f JB |
603 | PROCESS may be a process, a buffer, the name of a process or buffer, or\n\ |
604 | nil, indicating the current buffer's process.") | |
4ee3e309 EN |
605 | (process) |
606 | register Lisp_Object process; | |
d0d6b7c5 | 607 | { |
4ee3e309 EN |
608 | process = get_process (process); |
609 | XPROCESS (process)->raw_status_low = Qnil; | |
610 | XPROCESS (process)->raw_status_high = Qnil; | |
611 | if (NETCONN_P (process)) | |
d0d6b7c5 | 612 | { |
4ee3e309 EN |
613 | XPROCESS (process)->status = Fcons (Qexit, Fcons (make_number (0), Qnil)); |
614 | XSETINT (XPROCESS (process)->tick, ++process_tick); | |
d0d6b7c5 | 615 | } |
4ee3e309 | 616 | else if (XINT (XPROCESS (process)->infd) >= 0) |
d0d6b7c5 | 617 | { |
4ee3e309 | 618 | Fkill_process (process, Qnil); |
d0d6b7c5 | 619 | /* Do this now, since remove_process will make sigchld_handler do nothing. */ |
4ee3e309 | 620 | XPROCESS (process)->status |
d0d6b7c5 | 621 | = Fcons (Qsignal, Fcons (make_number (SIGKILL), Qnil)); |
4ee3e309 | 622 | XSETINT (XPROCESS (process)->tick, ++process_tick); |
d0d6b7c5 JB |
623 | status_notify (); |
624 | } | |
4ee3e309 | 625 | remove_process (process); |
d0d6b7c5 JB |
626 | return Qnil; |
627 | } | |
628 | \f | |
629 | DEFUN ("process-status", Fprocess_status, Sprocess_status, 1, 1, 0, | |
630 | "Return the status of PROCESS: a symbol, one of these:\n\ | |
631 | run -- for a process that is running.\n\ | |
632 | stop -- for a process stopped but continuable.\n\ | |
633 | exit -- for a process that has exited.\n\ | |
634 | signal -- for a process that has got a fatal signal.\n\ | |
635 | open -- for a network stream connection that is open.\n\ | |
636 | closed -- for a network stream connection that is closed.\n\ | |
ebb9e16f JB |
637 | nil -- if arg is a process name and no such process exists.\n\ |
638 | PROCESS may be a process, a buffer, the name of a process or buffer, or\n\ | |
639 | nil, indicating the current buffer's process.") | |
4ee3e309 EN |
640 | (process) |
641 | register Lisp_Object process; | |
d0d6b7c5 JB |
642 | { |
643 | register struct Lisp_Process *p; | |
644 | register Lisp_Object status; | |
343f4114 | 645 | |
4ee3e309 EN |
646 | if (STRINGP (process)) |
647 | process = Fget_process (process); | |
343f4114 | 648 | else |
4ee3e309 | 649 | process = get_process (process); |
343f4114 | 650 | |
4ee3e309 EN |
651 | if (NILP (process)) |
652 | return process; | |
343f4114 | 653 | |
4ee3e309 | 654 | p = XPROCESS (process); |
d0d6b7c5 JB |
655 | if (!NILP (p->raw_status_low)) |
656 | update_status (p); | |
657 | status = p->status; | |
bcd69aea | 658 | if (CONSP (status)) |
d0d6b7c5 | 659 | status = XCONS (status)->car; |
4ee3e309 | 660 | if (NETCONN_P (process)) |
d0d6b7c5 JB |
661 | { |
662 | if (EQ (status, Qrun)) | |
663 | status = Qopen; | |
664 | else if (EQ (status, Qexit)) | |
665 | status = Qclosed; | |
666 | } | |
667 | return status; | |
668 | } | |
669 | ||
670 | DEFUN ("process-exit-status", Fprocess_exit_status, Sprocess_exit_status, | |
671 | 1, 1, 0, | |
672 | "Return the exit status of PROCESS or the signal number that killed it.\n\ | |
673 | If PROCESS has not yet exited or died, return 0.") | |
4ee3e309 EN |
674 | (process) |
675 | register Lisp_Object process; | |
d0d6b7c5 | 676 | { |
4ee3e309 EN |
677 | CHECK_PROCESS (process, 0); |
678 | if (!NILP (XPROCESS (process)->raw_status_low)) | |
679 | update_status (XPROCESS (process)); | |
680 | if (CONSP (XPROCESS (process)->status)) | |
681 | return XCONS (XCONS (XPROCESS (process)->status)->cdr)->car; | |
d0d6b7c5 JB |
682 | return make_number (0); |
683 | } | |
684 | ||
685 | DEFUN ("process-id", Fprocess_id, Sprocess_id, 1, 1, 0, | |
686 | "Return the process id of PROCESS.\n\ | |
687 | This is the pid of the Unix process which PROCESS uses or talks to.\n\ | |
688 | For a network connection, this value is nil.") | |
4ee3e309 EN |
689 | (process) |
690 | register Lisp_Object process; | |
d0d6b7c5 | 691 | { |
4ee3e309 EN |
692 | CHECK_PROCESS (process, 0); |
693 | return XPROCESS (process)->pid; | |
d0d6b7c5 JB |
694 | } |
695 | ||
696 | DEFUN ("process-name", Fprocess_name, Sprocess_name, 1, 1, 0, | |
697 | "Return the name of PROCESS, as a string.\n\ | |
698 | This is the name of the program invoked in PROCESS,\n\ | |
699 | possibly modified to make it unique among process names.") | |
4ee3e309 EN |
700 | (process) |
701 | register Lisp_Object process; | |
d0d6b7c5 | 702 | { |
4ee3e309 EN |
703 | CHECK_PROCESS (process, 0); |
704 | return XPROCESS (process)->name; | |
d0d6b7c5 JB |
705 | } |
706 | ||
707 | DEFUN ("process-command", Fprocess_command, Sprocess_command, 1, 1, 0, | |
708 | "Return the command that was executed to start PROCESS.\n\ | |
709 | This is a list of strings, the first string being the program executed\n\ | |
710 | and the rest of the strings being the arguments given to it.\n\ | |
711 | For a non-child channel, this is nil.") | |
4ee3e309 EN |
712 | (process) |
713 | register Lisp_Object process; | |
d0d6b7c5 | 714 | { |
4ee3e309 EN |
715 | CHECK_PROCESS (process, 0); |
716 | return XPROCESS (process)->command; | |
d0d6b7c5 JB |
717 | } |
718 | ||
3b9a3dfa RS |
719 | DEFUN ("process-tty-name", Fprocess_tty_name, Sprocess_tty_name, 1, 1, 0, |
720 | "Return the name of the terminal PROCESS uses, or nil if none.\n\ | |
721 | This is the terminal that the process itself reads and writes on,\n\ | |
722 | not the name of the pty that Emacs uses to talk with that terminal.") | |
4ee3e309 EN |
723 | (process) |
724 | register Lisp_Object process; | |
3b9a3dfa | 725 | { |
4ee3e309 EN |
726 | CHECK_PROCESS (process, 0); |
727 | return XPROCESS (process)->tty_name; | |
3b9a3dfa RS |
728 | } |
729 | ||
d0d6b7c5 JB |
730 | DEFUN ("set-process-buffer", Fset_process_buffer, Sset_process_buffer, |
731 | 2, 2, 0, | |
732 | "Set buffer associated with PROCESS to BUFFER (a buffer, or nil).") | |
4ee3e309 EN |
733 | (process, buffer) |
734 | register Lisp_Object process, buffer; | |
d0d6b7c5 | 735 | { |
4ee3e309 | 736 | CHECK_PROCESS (process, 0); |
d0d6b7c5 JB |
737 | if (!NILP (buffer)) |
738 | CHECK_BUFFER (buffer, 1); | |
4ee3e309 | 739 | XPROCESS (process)->buffer = buffer; |
d0d6b7c5 JB |
740 | return buffer; |
741 | } | |
742 | ||
743 | DEFUN ("process-buffer", Fprocess_buffer, Sprocess_buffer, | |
744 | 1, 1, 0, | |
745 | "Return the buffer PROCESS is associated with.\n\ | |
746 | Output from PROCESS is inserted in this buffer\n\ | |
747 | unless PROCESS has a filter.") | |
4ee3e309 EN |
748 | (process) |
749 | register Lisp_Object process; | |
d0d6b7c5 | 750 | { |
4ee3e309 EN |
751 | CHECK_PROCESS (process, 0); |
752 | return XPROCESS (process)->buffer; | |
d0d6b7c5 JB |
753 | } |
754 | ||
755 | DEFUN ("process-mark", Fprocess_mark, Sprocess_mark, | |
756 | 1, 1, 0, | |
757 | "Return the marker for the end of the last output from PROCESS.") | |
4ee3e309 EN |
758 | (process) |
759 | register Lisp_Object process; | |
d0d6b7c5 | 760 | { |
4ee3e309 EN |
761 | CHECK_PROCESS (process, 0); |
762 | return XPROCESS (process)->mark; | |
d0d6b7c5 JB |
763 | } |
764 | ||
765 | DEFUN ("set-process-filter", Fset_process_filter, Sset_process_filter, | |
766 | 2, 2, 0, | |
767 | "Give PROCESS the filter function FILTER; nil means no filter.\n\ | |
20ddfff7 | 768 | t means stop accepting output from the process.\n\ |
d0d6b7c5 JB |
769 | When a process has a filter, each time it does output\n\ |
770 | the entire string of output is passed to the filter.\n\ | |
771 | The filter gets two arguments: the process and the string of output.\n\ | |
772 | If the process has a filter, its buffer is not used for output.") | |
4ee3e309 EN |
773 | (process, filter) |
774 | register Lisp_Object process, filter; | |
d0d6b7c5 | 775 | { |
4ee3e309 | 776 | CHECK_PROCESS (process, 0); |
20ddfff7 | 777 | if (EQ (filter, Qt)) |
a69281ff | 778 | { |
4ee3e309 EN |
779 | FD_CLR (XINT (XPROCESS (process)->infd), &input_wait_mask); |
780 | FD_CLR (XINT (XPROCESS (process)->infd), &non_keyboard_wait_mask); | |
a69281ff | 781 | } |
4ee3e309 | 782 | else if (EQ (XPROCESS (process)->filter, Qt)) |
a69281ff | 783 | { |
4ee3e309 EN |
784 | FD_SET (XINT (XPROCESS (process)->infd), &input_wait_mask); |
785 | FD_SET (XINT (XPROCESS (process)->infd), &non_keyboard_wait_mask); | |
a69281ff | 786 | } |
4ee3e309 | 787 | XPROCESS (process)->filter = filter; |
d0d6b7c5 JB |
788 | return filter; |
789 | } | |
790 | ||
791 | DEFUN ("process-filter", Fprocess_filter, Sprocess_filter, | |
792 | 1, 1, 0, | |
793 | "Returns the filter function of PROCESS; nil if none.\n\ | |
794 | See `set-process-filter' for more info on filter functions.") | |
4ee3e309 EN |
795 | (process) |
796 | register Lisp_Object process; | |
d0d6b7c5 | 797 | { |
4ee3e309 EN |
798 | CHECK_PROCESS (process, 0); |
799 | return XPROCESS (process)->filter; | |
d0d6b7c5 JB |
800 | } |
801 | ||
802 | DEFUN ("set-process-sentinel", Fset_process_sentinel, Sset_process_sentinel, | |
803 | 2, 2, 0, | |
804 | "Give PROCESS the sentinel SENTINEL; nil for none.\n\ | |
805 | The sentinel is called as a function when the process changes state.\n\ | |
806 | It gets two arguments: the process, and a string describing the change.") | |
4ee3e309 EN |
807 | (process, sentinel) |
808 | register Lisp_Object process, sentinel; | |
d0d6b7c5 | 809 | { |
4ee3e309 EN |
810 | CHECK_PROCESS (process, 0); |
811 | XPROCESS (process)->sentinel = sentinel; | |
d0d6b7c5 JB |
812 | return sentinel; |
813 | } | |
814 | ||
815 | DEFUN ("process-sentinel", Fprocess_sentinel, Sprocess_sentinel, | |
816 | 1, 1, 0, | |
817 | "Return the sentinel of PROCESS; nil if none.\n\ | |
818 | See `set-process-sentinel' for more info on sentinels.") | |
4ee3e309 EN |
819 | (process) |
820 | register Lisp_Object process; | |
d0d6b7c5 | 821 | { |
4ee3e309 EN |
822 | CHECK_PROCESS (process, 0); |
823 | return XPROCESS (process)->sentinel; | |
d0d6b7c5 JB |
824 | } |
825 | ||
396df322 RS |
826 | DEFUN ("set-process-window-size", Fset_process_window_size, |
827 | Sset_process_window_size, 3, 3, 0, | |
828 | "Tell PROCESS that it has logical window size HEIGHT and WIDTH.") | |
4ee3e309 EN |
829 | (process, height, width) |
830 | register Lisp_Object process, height, width; | |
396df322 | 831 | { |
4ee3e309 | 832 | CHECK_PROCESS (process, 0); |
396df322 RS |
833 | CHECK_NATNUM (height, 0); |
834 | CHECK_NATNUM (width, 0); | |
4ee3e309 | 835 | if (set_window_size (XINT (XPROCESS (process)->infd), |
396df322 RS |
836 | XINT (height), XINT(width)) <= 0) |
837 | return Qnil; | |
838 | else | |
839 | return Qt; | |
840 | } | |
841 | ||
d0d6b7c5 JB |
842 | DEFUN ("process-kill-without-query", Fprocess_kill_without_query, |
843 | Sprocess_kill_without_query, 1, 2, 0, | |
844 | "Say no query needed if PROCESS is running when Emacs is exited.\n\ | |
f2d2dbfe | 845 | Optional second argument if non-nil says to require a query.\n\ |
d0d6b7c5 | 846 | Value is t if a query was formerly required.") |
4ee3e309 EN |
847 | (process, value) |
848 | register Lisp_Object process, value; | |
d0d6b7c5 JB |
849 | { |
850 | Lisp_Object tem; | |
851 | ||
4ee3e309 EN |
852 | CHECK_PROCESS (process, 0); |
853 | tem = XPROCESS (process)->kill_without_query; | |
854 | XPROCESS (process)->kill_without_query = Fnull (value); | |
d0d6b7c5 JB |
855 | |
856 | return Fnull (tem); | |
857 | } | |
312c9964 | 858 | |
de282a05 RS |
859 | DEFUN ("process-contact", Fprocess_contact, Sprocess_contact, |
860 | 1, 1, 0, | |
861 | "Return the contact info of PROCESS; t for a real child.\n\ | |
862 | For a net connection, the value is a cons cell of the form (HOST SERVICE).") | |
863 | (process) | |
864 | register Lisp_Object process; | |
865 | { | |
866 | CHECK_PROCESS (process, 0); | |
867 | return XPROCESS (process)->childp; | |
868 | } | |
869 | ||
312c9964 RS |
870 | #if 0 /* Turned off because we don't currently record this info |
871 | in the process. Perhaps add it. */ | |
872 | DEFUN ("process-connection", Fprocess_connection, Sprocess_connection, 1, 1, 0, | |
873 | "Return the connection type of `PROCESS'.\n\ | |
874 | The value is `nil' for a pipe,\n\ | |
875 | `t' or `pty' for a pty, or `stream' for a socket connection.") | |
876 | (process) | |
877 | Lisp_Object process; | |
878 | { | |
879 | return XPROCESS (process)->type; | |
880 | } | |
881 | #endif | |
d0d6b7c5 JB |
882 | \f |
883 | Lisp_Object | |
884 | list_processes_1 () | |
885 | { | |
886 | register Lisp_Object tail, tem; | |
887 | Lisp_Object proc, minspace, tem1; | |
888 | register struct buffer *old = current_buffer; | |
889 | register struct Lisp_Process *p; | |
890 | register int state; | |
891 | char tembuf[80]; | |
892 | ||
22719df2 | 893 | XSETFASTINT (minspace, 1); |
d0d6b7c5 JB |
894 | |
895 | set_buffer_internal (XBUFFER (Vstandard_output)); | |
896 | Fbuffer_disable_undo (Vstandard_output); | |
897 | ||
898 | current_buffer->truncate_lines = Qt; | |
899 | ||
900 | write_string ("\ | |
a9fde32e KH |
901 | Proc Status Buffer Tty Command\n\ |
902 | ---- ------ ------ --- -------\n", -1); | |
d0d6b7c5 JB |
903 | |
904 | for (tail = Vprocess_alist; !NILP (tail); tail = Fcdr (tail)) | |
905 | { | |
906 | Lisp_Object symbol; | |
907 | ||
908 | proc = Fcdr (Fcar (tail)); | |
909 | p = XPROCESS (proc); | |
910 | if (NILP (p->childp)) | |
911 | continue; | |
912 | ||
913 | Finsert (1, &p->name); | |
914 | Findent_to (make_number (13), minspace); | |
915 | ||
916 | if (!NILP (p->raw_status_low)) | |
917 | update_status (p); | |
918 | symbol = p->status; | |
bcd69aea | 919 | if (CONSP (p->status)) |
d0d6b7c5 JB |
920 | symbol = XCONS (p->status)->car; |
921 | ||
922 | ||
923 | if (EQ (symbol, Qsignal)) | |
924 | { | |
925 | Lisp_Object tem; | |
926 | tem = Fcar (Fcdr (p->status)); | |
927 | #ifdef VMS | |
928 | if (XINT (tem) < NSIG) | |
b0310da4 | 929 | write_string (sys_errlist [XINT (tem)], -1); |
d0d6b7c5 JB |
930 | else |
931 | #endif | |
932 | Fprinc (symbol, Qnil); | |
933 | } | |
934 | else if (NETCONN_P (proc)) | |
935 | { | |
936 | if (EQ (symbol, Qrun)) | |
937 | write_string ("open", -1); | |
938 | else if (EQ (symbol, Qexit)) | |
939 | write_string ("closed", -1); | |
940 | else | |
941 | Fprinc (symbol, Qnil); | |
942 | } | |
943 | else | |
944 | Fprinc (symbol, Qnil); | |
945 | ||
946 | if (EQ (symbol, Qexit)) | |
947 | { | |
948 | Lisp_Object tem; | |
949 | tem = Fcar (Fcdr (p->status)); | |
950 | if (XFASTINT (tem)) | |
951 | { | |
3162bafa | 952 | sprintf (tembuf, " %d", (int) XFASTINT (tem)); |
d0d6b7c5 JB |
953 | write_string (tembuf, -1); |
954 | } | |
955 | } | |
956 | ||
957 | if (EQ (symbol, Qsignal) || EQ (symbol, Qexit)) | |
958 | remove_process (proc); | |
959 | ||
960 | Findent_to (make_number (22), minspace); | |
961 | if (NILP (p->buffer)) | |
962 | insert_string ("(none)"); | |
963 | else if (NILP (XBUFFER (p->buffer)->name)) | |
964 | insert_string ("(Killed)"); | |
965 | else | |
966 | Finsert (1, &XBUFFER (p->buffer)->name); | |
967 | ||
968 | Findent_to (make_number (37), minspace); | |
969 | ||
a9fde32e KH |
970 | if (STRINGP (p->tty_name)) |
971 | Finsert (1, &p->tty_name); | |
972 | else | |
973 | insert_string ("(none)"); | |
974 | ||
975 | Findent_to (make_number (49), minspace); | |
976 | ||
d0d6b7c5 JB |
977 | if (NETCONN_P (proc)) |
978 | { | |
979 | sprintf (tembuf, "(network stream connection to %s)\n", | |
de282a05 | 980 | XSTRING (XCONS (p->childp)->car)->data); |
d0d6b7c5 JB |
981 | insert_string (tembuf); |
982 | } | |
983 | else | |
984 | { | |
985 | tem = p->command; | |
986 | while (1) | |
987 | { | |
988 | tem1 = Fcar (tem); | |
989 | Finsert (1, &tem1); | |
990 | tem = Fcdr (tem); | |
991 | if (NILP (tem)) | |
992 | break; | |
993 | insert_string (" "); | |
994 | } | |
995 | insert_string ("\n"); | |
996 | } | |
997 | } | |
998 | return Qnil; | |
999 | } | |
1000 | ||
1001 | DEFUN ("list-processes", Flist_processes, Slist_processes, 0, 0, "", | |
1002 | "Display a list of all processes.\n\ | |
1003 | \(Any processes listed as Exited or Signaled are actually eliminated\n\ | |
1004 | after the listing is made.)") | |
1005 | () | |
1006 | { | |
1007 | internal_with_output_to_temp_buffer ("*Process List*", | |
1008 | list_processes_1, Qnil); | |
1009 | return Qnil; | |
1010 | } | |
1011 | ||
1012 | DEFUN ("process-list", Fprocess_list, Sprocess_list, 0, 0, 0, | |
1013 | "Return a list of all processes.") | |
1014 | () | |
1015 | { | |
1016 | return Fmapcar (Qcdr, Vprocess_alist); | |
1017 | } | |
1018 | \f | |
b0310da4 JB |
1019 | /* Starting asynchronous inferior processes. */ |
1020 | ||
1021 | static Lisp_Object start_process_unwind (); | |
1022 | ||
d0d6b7c5 JB |
1023 | DEFUN ("start-process", Fstart_process, Sstart_process, 3, MANY, 0, |
1024 | "Start a program in a subprocess. Return the process object for it.\n\ | |
1025 | Args are NAME BUFFER PROGRAM &rest PROGRAM-ARGS\n\ | |
1026 | NAME is name for process. It is modified if necessary to make it unique.\n\ | |
1027 | BUFFER is the buffer or (buffer-name) to associate with the process.\n\ | |
1028 | Process output goes at end of that buffer, unless you specify\n\ | |
1029 | an output stream or filter function to handle the output.\n\ | |
1030 | BUFFER may be also nil, meaning that this process is not associated\n\ | |
0fa1789e | 1031 | with any buffer.\n\ |
d0d6b7c5 JB |
1032 | Third arg is program file name. It is searched for as in the shell.\n\ |
1033 | Remaining arguments are strings to give program as arguments.") | |
1034 | (nargs, args) | |
1035 | int nargs; | |
1036 | register Lisp_Object *args; | |
1037 | { | |
1e30af70 | 1038 | Lisp_Object buffer, name, program, proc, current_dir, tem; |
d0d6b7c5 JB |
1039 | #ifdef VMS |
1040 | register unsigned char *new_argv; | |
1041 | int len; | |
1042 | #else | |
1043 | register unsigned char **new_argv; | |
1044 | #endif | |
1045 | register int i; | |
b0310da4 | 1046 | int count = specpdl_ptr - specpdl; |
d0d6b7c5 JB |
1047 | |
1048 | buffer = args[1]; | |
1049 | if (!NILP (buffer)) | |
1050 | buffer = Fget_buffer_create (buffer); | |
1051 | ||
1e30af70 JB |
1052 | /* Make sure that the child will be able to chdir to the current |
1053 | buffer's current directory, or its unhandled equivalent. We | |
1054 | can't just have the child check for an error when it does the | |
1055 | chdir, since it's in a vfork. | |
1056 | ||
1057 | We have to GCPRO around this because Fexpand_file_name and | |
1058 | Funhandled_file_name_directory might call a file name handling | |
1059 | function. The argument list is protected by the caller, so all | |
1060 | we really have to worry about is buffer. */ | |
1061 | { | |
1062 | struct gcpro gcpro1, gcpro2; | |
1063 | ||
1064 | current_dir = current_buffer->directory; | |
1065 | ||
1066 | GCPRO2 (buffer, current_dir); | |
1067 | ||
7af71e17 RS |
1068 | current_dir |
1069 | = expand_and_dir_to_file (Funhandled_file_name_directory (current_dir), | |
1070 | Qnil); | |
1e30af70 JB |
1071 | if (NILP (Ffile_accessible_directory_p (current_dir))) |
1072 | report_file_error ("Setting current directory", | |
1073 | Fcons (current_buffer->directory, Qnil)); | |
1074 | ||
1075 | UNGCPRO; | |
1076 | } | |
1077 | ||
d0d6b7c5 JB |
1078 | name = args[0]; |
1079 | CHECK_STRING (name, 0); | |
1080 | ||
1081 | program = args[2]; | |
1082 | ||
1083 | CHECK_STRING (program, 2); | |
1084 | ||
1085 | #ifdef VMS | |
1086 | /* Make a one member argv with all args concatenated | |
1087 | together separated by a blank. */ | |
1088 | len = XSTRING (program)->size + 2; | |
1089 | for (i = 3; i < nargs; i++) | |
1090 | { | |
1091 | tem = args[i]; | |
1092 | CHECK_STRING (tem, i); | |
1093 | len += XSTRING (tem)->size + 1; /* count the blank */ | |
1094 | } | |
1095 | new_argv = (unsigned char *) alloca (len); | |
1096 | strcpy (new_argv, XSTRING (program)->data); | |
1097 | for (i = 3; i < nargs; i++) | |
1098 | { | |
1099 | tem = args[i]; | |
1100 | CHECK_STRING (tem, i); | |
1101 | strcat (new_argv, " "); | |
1102 | strcat (new_argv, XSTRING (tem)->data); | |
1103 | } | |
b0310da4 JB |
1104 | /* Need to add code here to check for program existence on VMS */ |
1105 | ||
d0d6b7c5 JB |
1106 | #else /* not VMS */ |
1107 | new_argv = (unsigned char **) alloca ((nargs - 1) * sizeof (char *)); | |
1108 | ||
d0d6b7c5 | 1109 | /* If program file name is not absolute, search our path for it */ |
e98d950b RS |
1110 | if (!IS_DIRECTORY_SEP (XSTRING (program)->data[0]) |
1111 | && !(XSTRING (program)->size > 1 | |
1112 | && IS_DEVICE_SEP (XSTRING (program)->data[1]))) | |
d0d6b7c5 | 1113 | { |
3b639868 KH |
1114 | struct gcpro gcpro1, gcpro2, gcpro3, gcpro4; |
1115 | ||
d0d6b7c5 | 1116 | tem = Qnil; |
3b639868 | 1117 | GCPRO4 (name, program, buffer, current_dir); |
5437e9f9 | 1118 | openp (Vexec_path, program, EXEC_SUFFIXES, &tem, 1); |
3b639868 | 1119 | UNGCPRO; |
d0d6b7c5 JB |
1120 | if (NILP (tem)) |
1121 | report_file_error ("Searching for program", Fcons (program, Qnil)); | |
f8a87498 | 1122 | tem = Fexpand_file_name (tem, Qnil); |
d0d6b7c5 JB |
1123 | new_argv[0] = XSTRING (tem)->data; |
1124 | } | |
3b639868 | 1125 | else |
13373f4e RS |
1126 | { |
1127 | if (!NILP (Ffile_directory_p (program))) | |
1128 | error ("Specified program for new process is a directory"); | |
1129 | ||
1130 | new_argv[0] = XSTRING (program)->data; | |
1131 | } | |
3b639868 KH |
1132 | |
1133 | for (i = 3; i < nargs; i++) | |
1134 | { | |
1135 | tem = args[i]; | |
1136 | CHECK_STRING (tem, i); | |
1137 | new_argv[i - 2] = XSTRING (tem)->data; | |
1138 | } | |
1139 | new_argv[i - 2] = 0; | |
d0d6b7c5 JB |
1140 | #endif /* not VMS */ |
1141 | ||
1142 | proc = make_process (name); | |
b0310da4 JB |
1143 | /* If an error occurs and we can't start the process, we want to |
1144 | remove it from the process list. This means that each error | |
1145 | check in create_process doesn't need to call remove_process | |
1146 | itself; it's all taken care of here. */ | |
1147 | record_unwind_protect (start_process_unwind, proc); | |
d0d6b7c5 JB |
1148 | |
1149 | XPROCESS (proc)->childp = Qt; | |
1150 | XPROCESS (proc)->command_channel_p = Qnil; | |
1151 | XPROCESS (proc)->buffer = buffer; | |
1152 | XPROCESS (proc)->sentinel = Qnil; | |
1153 | XPROCESS (proc)->filter = Qnil; | |
1154 | XPROCESS (proc)->command = Flist (nargs - 2, args + 2); | |
1155 | ||
7af71e17 RS |
1156 | /* Make the process marker point into the process buffer (if any). */ |
1157 | if (!NILP (buffer)) | |
1158 | Fset_marker (XPROCESS (proc)->mark, | |
1159 | make_number (BUF_ZV (XBUFFER (buffer))), buffer); | |
1160 | ||
c7580538 KH |
1161 | if (!NILP (buffer) && NILP (XBUFFER (buffer)->enable_multibyte_characters) |
1162 | || NILP (buffer) && NILP (buffer_defaults.enable_multibyte_characters)) | |
1163 | { | |
1164 | XPROCESS (proc)->decode_coding_system = Qnil; | |
1165 | XPROCESS (proc)->encode_coding_system = Qnil; | |
1166 | } | |
1167 | else | |
1168 | { | |
1169 | /* Setup coding systems for communicating with the process. */ | |
1170 | /* Qt denotes that we have not yet called Ffind_coding_system. */ | |
1171 | Lisp_Object coding_systems = Qt; | |
1172 | Lisp_Object val, *args2; | |
1173 | struct gcpro gcpro1; | |
0fa1789e | 1174 | |
c7580538 KH |
1175 | if (NILP (val = Vcoding_system_for_read)) |
1176 | { | |
1177 | args2 = (Lisp_Object *) alloca ((nargs + 1) * sizeof *args2); | |
1178 | args2[0] = Qstart_process; | |
1179 | for (i = 0; i < nargs; i++) args2[i + 1] = args[i]; | |
1180 | GCPRO1 (proc); | |
1181 | coding_systems = Ffind_coding_system (nargs + 1, args2); | |
1182 | UNGCPRO; | |
1183 | if (CONSP (coding_systems)) | |
1184 | val = XCONS (coding_systems)->car; | |
83502605 KH |
1185 | else if (CONSP (Vdefault_process_coding_system)) |
1186 | val = XCONS (Vdefault_process_coding_system)->car; | |
c7580538 KH |
1187 | } |
1188 | XPROCESS (proc)->decode_coding_system = val; | |
0fa1789e | 1189 | |
c7580538 KH |
1190 | if (NILP (val = Vcoding_system_for_write)) |
1191 | { | |
1192 | if (EQ (coding_systems, Qt)) | |
1193 | { | |
1194 | args2 = (Lisp_Object *) alloca ((nargs + 1) * sizeof args2); | |
1195 | args2[0] = Qstart_process; | |
1196 | for (i = 0; i < nargs; i++) args2[i + 1] = args[i]; | |
1197 | GCPRO1 (proc); | |
1198 | coding_systems = Ffind_coding_system (nargs + 1, args2); | |
1199 | UNGCPRO; | |
1200 | } | |
1201 | if (CONSP (coding_systems)) | |
1202 | val = XCONS (coding_systems)->cdr; | |
83502605 KH |
1203 | else if (CONSP (Vdefault_process_coding_system)) |
1204 | val = XCONS (Vdefault_process_coding_system)->cdr; | |
c7580538 KH |
1205 | } |
1206 | XPROCESS (proc)->encode_coding_system = val; | |
1207 | } | |
0fa1789e KH |
1208 | |
1209 | XPROCESS (proc)->decoding_buf = make_uninit_string (0); | |
1210 | XPROCESS (proc)->encoding_buf = make_uninit_string (0); | |
1211 | ||
1e30af70 | 1212 | create_process (proc, new_argv, current_dir); |
d0d6b7c5 | 1213 | |
b0310da4 | 1214 | return unbind_to (count, proc); |
d0d6b7c5 JB |
1215 | } |
1216 | ||
b0310da4 | 1217 | /* This function is the unwind_protect form for Fstart_process. If |
8e6208c5 | 1218 | PROC doesn't have its pid set, then we know someone has signaled |
b0310da4 JB |
1219 | an error and the process wasn't started successfully, so we should |
1220 | remove it from the process list. */ | |
1221 | static Lisp_Object | |
1222 | start_process_unwind (proc) | |
1223 | Lisp_Object proc; | |
1224 | { | |
bcd69aea | 1225 | if (!PROCESSP (proc)) |
b0310da4 JB |
1226 | abort (); |
1227 | ||
1228 | /* Was PROC started successfully? */ | |
188d6c4e | 1229 | if (XINT (XPROCESS (proc)->pid) <= 0) |
b0310da4 JB |
1230 | remove_process (proc); |
1231 | ||
1232 | return Qnil; | |
1233 | } | |
1234 | ||
1235 | ||
d0d6b7c5 JB |
1236 | SIGTYPE |
1237 | create_process_1 (signo) | |
1238 | int signo; | |
1239 | { | |
3c0ee47b | 1240 | #if defined (USG) && !defined (POSIX_SIGNALS) |
d0d6b7c5 JB |
1241 | /* USG systems forget handlers when they are used; |
1242 | must reestablish each time */ | |
1243 | signal (signo, create_process_1); | |
1244 | #endif /* USG */ | |
1245 | } | |
1246 | ||
1247 | #if 0 /* This doesn't work; see the note before sigchld_handler. */ | |
1248 | #ifdef USG | |
1249 | #ifdef SIGCHLD | |
1250 | /* Mimic blocking of signals on system V, which doesn't really have it. */ | |
1251 | ||
1252 | /* Nonzero means we got a SIGCHLD when it was supposed to be blocked. */ | |
1253 | int sigchld_deferred; | |
1254 | ||
1255 | SIGTYPE | |
1256 | create_process_sigchld () | |
1257 | { | |
1258 | signal (SIGCHLD, create_process_sigchld); | |
1259 | ||
1260 | sigchld_deferred = 1; | |
1261 | } | |
1262 | #endif | |
1263 | #endif | |
1264 | #endif | |
1265 | ||
1266 | #ifndef VMS /* VMS version of this function is in vmsproc.c. */ | |
1e30af70 | 1267 | create_process (process, new_argv, current_dir) |
d0d6b7c5 JB |
1268 | Lisp_Object process; |
1269 | char **new_argv; | |
1e30af70 | 1270 | Lisp_Object current_dir; |
d0d6b7c5 | 1271 | { |
ecd1f654 | 1272 | int pid, inchannel, outchannel; |
d0d6b7c5 | 1273 | int sv[2]; |
0dc70c33 KH |
1274 | #ifdef POSIX_SIGNALS |
1275 | sigset_t procmask; | |
1276 | sigset_t blocked; | |
1277 | struct sigaction sigint_action; | |
1278 | struct sigaction sigquit_action; | |
1279 | #ifdef AIX | |
1280 | struct sigaction sighup_action; | |
1281 | #endif | |
1282 | #else /* !POSIX_SIGNALS */ | |
d0d6b7c5 JB |
1283 | #ifdef SIGCHLD |
1284 | SIGTYPE (*sigchld)(); | |
1285 | #endif | |
0dc70c33 | 1286 | #endif /* !POSIX_SIGNALS */ |
ecd1f654 KH |
1287 | /* Use volatile to protect variables from being clobbered by longjmp. */ |
1288 | volatile int forkin, forkout; | |
1289 | volatile int pty_flag = 0; | |
d0d6b7c5 JB |
1290 | extern char **environ; |
1291 | ||
d0d6b7c5 JB |
1292 | inchannel = outchannel = -1; |
1293 | ||
1294 | #ifdef HAVE_PTYS | |
fe45da4e | 1295 | if (!NILP (Vprocess_connection_type)) |
d0d6b7c5 JB |
1296 | outchannel = inchannel = allocate_pty (); |
1297 | ||
d0d6b7c5 JB |
1298 | if (inchannel >= 0) |
1299 | { | |
1300 | #ifndef USG | |
1301 | /* On USG systems it does not work to open the pty's tty here | |
1302 | and then close and reopen it in the child. */ | |
1303 | #ifdef O_NOCTTY | |
1304 | /* Don't let this terminal become our controlling terminal | |
1305 | (in case we don't have one). */ | |
1306 | forkout = forkin = open (pty_name, O_RDWR | O_NOCTTY, 0); | |
1307 | #else | |
1308 | forkout = forkin = open (pty_name, O_RDWR, 0); | |
1309 | #endif | |
1310 | if (forkin < 0) | |
1311 | report_file_error ("Opening pty", Qnil); | |
1312 | #else | |
1313 | forkin = forkout = -1; | |
1314 | #endif /* not USG */ | |
1315 | pty_flag = 1; | |
1316 | } | |
1317 | else | |
1318 | #endif /* HAVE_PTYS */ | |
1319 | #ifdef SKTPAIR | |
1320 | { | |
1321 | if (socketpair (AF_UNIX, SOCK_STREAM, 0, sv) < 0) | |
1322 | report_file_error ("Opening socketpair", Qnil); | |
1323 | outchannel = inchannel = sv[0]; | |
1324 | forkout = forkin = sv[1]; | |
1325 | } | |
1326 | #else /* not SKTPAIR */ | |
1327 | { | |
1328 | pipe (sv); | |
1329 | inchannel = sv[0]; | |
1330 | forkout = sv[1]; | |
1331 | pipe (sv); | |
1332 | outchannel = sv[1]; | |
1333 | forkin = sv[0]; | |
1334 | } | |
1335 | #endif /* not SKTPAIR */ | |
1336 | ||
1337 | #if 0 | |
1338 | /* Replaced by close_process_descs */ | |
1339 | set_exclusive_use (inchannel); | |
1340 | set_exclusive_use (outchannel); | |
1341 | #endif | |
1342 | ||
1343 | /* Stride people say it's a mystery why this is needed | |
1344 | as well as the O_NDELAY, but that it fails without this. */ | |
1345 | #if defined (STRIDE) || (defined (pfa) && defined (HAVE_PTYS)) | |
1346 | { | |
1347 | int one = 1; | |
1348 | ioctl (inchannel, FIONBIO, &one); | |
1349 | } | |
1350 | #endif | |
1351 | ||
1352 | #ifdef O_NONBLOCK | |
1353 | fcntl (inchannel, F_SETFL, O_NONBLOCK); | |
03832893 | 1354 | fcntl (outchannel, F_SETFL, O_NONBLOCK); |
d0d6b7c5 JB |
1355 | #else |
1356 | #ifdef O_NDELAY | |
1357 | fcntl (inchannel, F_SETFL, O_NDELAY); | |
03832893 | 1358 | fcntl (outchannel, F_SETFL, O_NDELAY); |
d0d6b7c5 JB |
1359 | #endif |
1360 | #endif | |
1361 | ||
1362 | /* Record this as an active process, with its channels. | |
1363 | As a result, child_setup will close Emacs's side of the pipes. */ | |
1364 | chan_process[inchannel] = process; | |
1d056e64 KH |
1365 | XSETINT (XPROCESS (process)->infd, inchannel); |
1366 | XSETINT (XPROCESS (process)->outfd, outchannel); | |
d0d6b7c5 JB |
1367 | /* Record the tty descriptor used in the subprocess. */ |
1368 | if (forkin < 0) | |
1369 | XPROCESS (process)->subtty = Qnil; | |
1370 | else | |
22719df2 | 1371 | XSETFASTINT (XPROCESS (process)->subtty, forkin); |
d0d6b7c5 JB |
1372 | XPROCESS (process)->pty_flag = (pty_flag ? Qt : Qnil); |
1373 | XPROCESS (process)->status = Qrun; | |
c7580538 KH |
1374 | if (!proc_decode_coding_system[inchannel]) |
1375 | proc_decode_coding_system[inchannel] | |
1376 | = (struct coding_system *) xmalloc (sizeof (struct coding_system)); | |
0fa1789e | 1377 | setup_coding_system (XPROCESS (process)->decode_coding_system, |
c7580538 KH |
1378 | proc_decode_coding_system[inchannel]); |
1379 | if (!proc_encode_coding_system[outchannel]) | |
1380 | proc_encode_coding_system[outchannel] | |
1381 | = (struct coding_system *) xmalloc (sizeof (struct coding_system)); | |
0fa1789e | 1382 | setup_coding_system (XPROCESS (process)->encode_coding_system, |
c7580538 | 1383 | proc_encode_coding_system[outchannel]); |
d0d6b7c5 JB |
1384 | |
1385 | /* Delay interrupts until we have a chance to store | |
1386 | the new fork's pid in its process structure */ | |
0dc70c33 KH |
1387 | #ifdef POSIX_SIGNALS |
1388 | sigemptyset (&blocked); | |
1389 | #ifdef SIGCHLD | |
1390 | sigaddset (&blocked, SIGCHLD); | |
1391 | #endif | |
1392 | #ifdef HAVE_VFORK | |
1393 | /* On many hosts (e.g. Solaris 2.4), if a vforked child calls `signal', | |
1394 | this sets the parent's signal handlers as well as the child's. | |
1395 | So delay all interrupts whose handlers the child might munge, | |
1396 | and record the current handlers so they can be restored later. */ | |
1397 | sigaddset (&blocked, SIGINT ); sigaction (SIGINT , 0, &sigint_action ); | |
1398 | sigaddset (&blocked, SIGQUIT); sigaction (SIGQUIT, 0, &sigquit_action); | |
1399 | #ifdef AIX | |
1400 | sigaddset (&blocked, SIGHUP ); sigaction (SIGHUP , 0, &sighup_action ); | |
1401 | #endif | |
1402 | #endif /* HAVE_VFORK */ | |
1403 | sigprocmask (SIG_BLOCK, &blocked, &procmask); | |
1404 | #else /* !POSIX_SIGNALS */ | |
d0d6b7c5 JB |
1405 | #ifdef SIGCHLD |
1406 | #ifdef BSD4_1 | |
1407 | sighold (SIGCHLD); | |
1408 | #else /* not BSD4_1 */ | |
6df54671 | 1409 | #if defined (BSD_SYSTEM) || defined (UNIPLUS) || defined (HPUX) |
d0d6b7c5 JB |
1410 | sigsetmask (sigmask (SIGCHLD)); |
1411 | #else /* ordinary USG */ | |
1412 | #if 0 | |
1413 | sigchld_deferred = 0; | |
1414 | sigchld = signal (SIGCHLD, create_process_sigchld); | |
1415 | #endif | |
1416 | #endif /* ordinary USG */ | |
1417 | #endif /* not BSD4_1 */ | |
1418 | #endif /* SIGCHLD */ | |
0dc70c33 | 1419 | #endif /* !POSIX_SIGNALS */ |
d0d6b7c5 | 1420 | |
3081bf8d | 1421 | FD_SET (inchannel, &input_wait_mask); |
a69281ff | 1422 | FD_SET (inchannel, &non_keyboard_wait_mask); |
3081bf8d KH |
1423 | if (inchannel > max_process_desc) |
1424 | max_process_desc = inchannel; | |
1425 | ||
d0d6b7c5 JB |
1426 | /* Until we store the proper pid, enable sigchld_handler |
1427 | to recognize an unknown pid as standing for this process. | |
1428 | It is very important not to let this `marker' value stay | |
1429 | in the table after this function has returned; if it does | |
1430 | it might cause call-process to hang and subsequent asynchronous | |
1431 | processes to get their return values scrambled. */ | |
1432 | XSETINT (XPROCESS (process)->pid, -1); | |
1433 | ||
ececcbec RS |
1434 | BLOCK_INPUT; |
1435 | ||
d0d6b7c5 JB |
1436 | { |
1437 | /* child_setup must clobber environ on systems with true vfork. | |
1438 | Protect it from permanent change. */ | |
1439 | char **save_environ = environ; | |
1440 | ||
e98d950b | 1441 | #ifndef WINDOWSNT |
d0d6b7c5 JB |
1442 | pid = vfork (); |
1443 | if (pid == 0) | |
e98d950b | 1444 | #endif /* not WINDOWSNT */ |
d0d6b7c5 JB |
1445 | { |
1446 | int xforkin = forkin; | |
1447 | int xforkout = forkout; | |
1448 | ||
1449 | #if 0 /* This was probably a mistake--it duplicates code later on, | |
1450 | but fails to handle all the cases. */ | |
1451 | /* Make sure SIGCHLD is not blocked in the child. */ | |
1452 | sigsetmask (SIGEMPTYMASK); | |
1453 | #endif | |
1454 | ||
1455 | /* Make the pty be the controlling terminal of the process. */ | |
1456 | #ifdef HAVE_PTYS | |
1457 | /* First, disconnect its current controlling terminal. */ | |
1458 | #ifdef HAVE_SETSID | |
7ce48618 RS |
1459 | /* We tried doing setsid only if pty_flag, but it caused |
1460 | process_set_signal to fail on SGI when using a pipe. */ | |
1461 | setsid (); | |
ce4c9c90 | 1462 | /* Make the pty's terminal the controlling terminal. */ |
084fd64a | 1463 | if (pty_flag) |
39e9ebcd | 1464 | { |
39e9ebcd RS |
1465 | #ifdef TIOCSCTTY |
1466 | /* We ignore the return value | |
1467 | because faith@cs.unc.edu says that is necessary on Linux. */ | |
1468 | ioctl (xforkin, TIOCSCTTY, 0); | |
ce4c9c90 | 1469 | #endif |
39e9ebcd | 1470 | } |
d0d6b7c5 | 1471 | #else /* not HAVE_SETSID */ |
c14e53a4 | 1472 | #ifdef USG |
000ab717 | 1473 | /* It's very important to call setpgrp here and no time |
d0d6b7c5 JB |
1474 | afterwards. Otherwise, we lose our controlling tty which |
1475 | is set when we open the pty. */ | |
1476 | setpgrp (); | |
1477 | #endif /* USG */ | |
1478 | #endif /* not HAVE_SETSID */ | |
9bcf8ec6 KH |
1479 | #if defined (HAVE_TERMIOS) && defined (LDISC1) |
1480 | if (pty_flag && xforkin >= 0) | |
1481 | { | |
1482 | struct termios t; | |
1483 | tcgetattr (xforkin, &t); | |
1484 | t.c_lflag = LDISC1; | |
1485 | if (tcsetattr (xforkin, TCSANOW, &t) < 0) | |
1486 | write (1, "create_process/tcsetattr LDISC1 failed\n", 39); | |
1487 | } | |
1488 | #else | |
aafadd9f | 1489 | #if defined (NTTYDISC) && defined (TIOCSETD) |
ff773a4e | 1490 | if (pty_flag && xforkin >= 0) |
afc549fd RS |
1491 | { |
1492 | /* Use new line discipline. */ | |
1493 | int ldisc = NTTYDISC; | |
4458f555 | 1494 | ioctl (xforkin, TIOCSETD, &ldisc); |
afc549fd | 1495 | } |
000ab717 | 1496 | #endif |
9bcf8ec6 | 1497 | #endif |
d0d6b7c5 JB |
1498 | #ifdef TIOCNOTTY |
1499 | /* In 4.3BSD, the TIOCSPGRP bug has been fixed, and now you | |
1500 | can do TIOCSPGRP only to the process's controlling tty. */ | |
1501 | if (pty_flag) | |
1502 | { | |
1503 | /* I wonder: would just ioctl (0, TIOCNOTTY, 0) work here? | |
1504 | I can't test it since I don't have 4.3. */ | |
1505 | int j = open ("/dev/tty", O_RDWR, 0); | |
1506 | ioctl (j, TIOCNOTTY, 0); | |
1507 | close (j); | |
5a570e37 | 1508 | #ifndef USG |
d0d6b7c5 JB |
1509 | /* In order to get a controlling terminal on some versions |
1510 | of BSD, it is necessary to put the process in pgrp 0 | |
1511 | before it opens the terminal. */ | |
99c1aeca | 1512 | #ifdef HAVE_SETPGID |
3ea1d291 RS |
1513 | setpgid (0, 0); |
1514 | #else | |
d0d6b7c5 | 1515 | setpgrp (0, 0); |
3ea1d291 | 1516 | #endif |
d0d6b7c5 JB |
1517 | #endif |
1518 | } | |
1519 | #endif /* TIOCNOTTY */ | |
1520 | ||
99153b9e | 1521 | #if !defined (RTU) && !defined (UNIPLUS) && !defined (DONT_REOPEN_PTY) |
d0d6b7c5 | 1522 | /*** There is a suggestion that this ought to be a |
99153b9e RS |
1523 | conditional on TIOCSPGRP, |
1524 | or !(defined (HAVE_SETSID) && defined (TIOCSCTTY)). | |
1525 | Trying the latter gave the wrong results on Debian GNU/Linux 1.1; | |
1526 | that system does seem to need this code, even though | |
1527 | both HAVE_SETSID and TIOCSCTTY are defined. */ | |
d0d6b7c5 JB |
1528 | /* Now close the pty (if we had it open) and reopen it. |
1529 | This makes the pty the controlling terminal of the subprocess. */ | |
1530 | if (pty_flag) | |
1531 | { | |
99e3d726 RS |
1532 | #ifdef SET_CHILD_PTY_PGRP |
1533 | int pgrp = getpid (); | |
1534 | #endif | |
1535 | ||
d0d6b7c5 JB |
1536 | /* I wonder if close (open (pty_name, ...)) would work? */ |
1537 | if (xforkin >= 0) | |
1538 | close (xforkin); | |
1539 | xforkout = xforkin = open (pty_name, O_RDWR, 0); | |
1540 | ||
4aa54ba8 RS |
1541 | if (xforkin < 0) |
1542 | { | |
1543 | write (1, "Couldn't open the pty terminal ", 31); | |
1544 | write (1, pty_name, strlen (pty_name)); | |
1545 | write (1, "\n", 1); | |
1546 | _exit (1); | |
1547 | } | |
1548 | ||
99e3d726 RS |
1549 | #ifdef SET_CHILD_PTY_PGRP |
1550 | ioctl (xforkin, TIOCSPGRP, &pgrp); | |
1551 | ioctl (xforkout, TIOCSPGRP, &pgrp); | |
1552 | #endif | |
d0d6b7c5 | 1553 | } |
99153b9e | 1554 | #endif /* not UNIPLUS and not RTU and not DONT_REOPEN_PTY */ |
e9bf058b | 1555 | |
d0d6b7c5 | 1556 | #ifdef SETUP_SLAVE_PTY |
13a72104 RS |
1557 | if (pty_flag) |
1558 | { | |
1559 | SETUP_SLAVE_PTY; | |
1560 | } | |
d0d6b7c5 JB |
1561 | #endif /* SETUP_SLAVE_PTY */ |
1562 | #ifdef AIX | |
1563 | /* On AIX, we've disabled SIGHUP above once we start a child on a pty. | |
1564 | Now reenable it in the child, so it will die when we want it to. */ | |
1565 | if (pty_flag) | |
1566 | signal (SIGHUP, SIG_DFL); | |
1567 | #endif | |
1568 | #endif /* HAVE_PTYS */ | |
1569 | ||
0dc70c33 KH |
1570 | signal (SIGINT, SIG_DFL); |
1571 | signal (SIGQUIT, SIG_DFL); | |
1572 | ||
1573 | /* Stop blocking signals in the child. */ | |
1574 | #ifdef POSIX_SIGNALS | |
1575 | sigprocmask (SIG_SETMASK, &procmask, 0); | |
1576 | #else /* !POSIX_SIGNALS */ | |
d0d6b7c5 JB |
1577 | #ifdef SIGCHLD |
1578 | #ifdef BSD4_1 | |
1579 | sigrelse (SIGCHLD); | |
1580 | #else /* not BSD4_1 */ | |
6df54671 | 1581 | #if defined (BSD_SYSTEM) || defined (UNIPLUS) || defined (HPUX) |
d0d6b7c5 JB |
1582 | sigsetmask (SIGEMPTYMASK); |
1583 | #else /* ordinary USG */ | |
63528b78 | 1584 | #if 0 |
d0d6b7c5 | 1585 | signal (SIGCHLD, sigchld); |
63528b78 | 1586 | #endif |
d0d6b7c5 JB |
1587 | #endif /* ordinary USG */ |
1588 | #endif /* not BSD4_1 */ | |
1589 | #endif /* SIGCHLD */ | |
0dc70c33 | 1590 | #endif /* !POSIX_SIGNALS */ |
5e7e1da2 | 1591 | |
ab01d0a8 RS |
1592 | if (pty_flag) |
1593 | child_setup_tty (xforkout); | |
e98d950b RS |
1594 | #ifdef WINDOWSNT |
1595 | pid = child_setup (xforkin, xforkout, xforkout, | |
1596 | new_argv, 1, current_dir); | |
1597 | #else /* not WINDOWSNT */ | |
d0d6b7c5 | 1598 | child_setup (xforkin, xforkout, xforkout, |
e065a56e | 1599 | new_argv, 1, current_dir); |
e98d950b | 1600 | #endif /* not WINDOWSNT */ |
d0d6b7c5 JB |
1601 | } |
1602 | environ = save_environ; | |
1603 | } | |
1604 | ||
ececcbec RS |
1605 | UNBLOCK_INPUT; |
1606 | ||
4a127b3b | 1607 | /* This runs in the Emacs process. */ |
d0d6b7c5 | 1608 | if (pid < 0) |
6311cf58 RS |
1609 | { |
1610 | if (forkin >= 0) | |
1611 | close (forkin); | |
1612 | if (forkin != forkout && forkout >= 0) | |
1613 | close (forkout); | |
6311cf58 | 1614 | } |
4a127b3b KH |
1615 | else |
1616 | { | |
1617 | /* vfork succeeded. */ | |
1618 | XSETFASTINT (XPROCESS (process)->pid, pid); | |
d0d6b7c5 | 1619 | |
e98d950b | 1620 | #ifdef WINDOWSNT |
4a127b3b | 1621 | register_child (pid, inchannel); |
e98d950b RS |
1622 | #endif /* WINDOWSNT */ |
1623 | ||
4a127b3b KH |
1624 | /* If the subfork execv fails, and it exits, |
1625 | this close hangs. I don't know why. | |
1626 | So have an interrupt jar it loose. */ | |
1627 | stop_polling (); | |
1628 | signal (SIGALRM, create_process_1); | |
1629 | alarm (1); | |
1630 | XPROCESS (process)->subtty = Qnil; | |
1631 | if (forkin >= 0) | |
1632 | close (forkin); | |
1633 | alarm (0); | |
1634 | start_polling (); | |
1635 | if (forkin != forkout && forkout >= 0) | |
1636 | close (forkout); | |
d0d6b7c5 | 1637 | |
875e6b94 | 1638 | #ifdef HAVE_PTYS |
4a127b3b KH |
1639 | if (pty_flag) |
1640 | XPROCESS (process)->tty_name = build_string (pty_name); | |
1641 | else | |
875e6b94 | 1642 | #endif |
4a127b3b KH |
1643 | XPROCESS (process)->tty_name = Qnil; |
1644 | } | |
3b9a3dfa | 1645 | |
4a127b3b KH |
1646 | /* Restore the signal state whether vfork succeeded or not. |
1647 | (We will signal an error, below, if it failed.) */ | |
0dc70c33 KH |
1648 | #ifdef POSIX_SIGNALS |
1649 | #ifdef HAVE_VFORK | |
1650 | /* Restore the parent's signal handlers. */ | |
1651 | sigaction (SIGINT, &sigint_action, 0); | |
1652 | sigaction (SIGQUIT, &sigquit_action, 0); | |
1653 | #ifdef AIX | |
1654 | sigaction (SIGHUP, &sighup_action, 0); | |
1655 | #endif | |
1656 | #endif /* HAVE_VFORK */ | |
1657 | /* Stop blocking signals in the parent. */ | |
1658 | sigprocmask (SIG_SETMASK, &procmask, 0); | |
1659 | #else /* !POSIX_SIGNALS */ | |
d0d6b7c5 JB |
1660 | #ifdef SIGCHLD |
1661 | #ifdef BSD4_1 | |
1662 | sigrelse (SIGCHLD); | |
1663 | #else /* not BSD4_1 */ | |
6df54671 | 1664 | #if defined (BSD_SYSTEM) || defined (UNIPLUS) || defined (HPUX) |
d0d6b7c5 JB |
1665 | sigsetmask (SIGEMPTYMASK); |
1666 | #else /* ordinary USG */ | |
1667 | #if 0 | |
1668 | signal (SIGCHLD, sigchld); | |
1669 | /* Now really handle any of these signals | |
1670 | that came in during this function. */ | |
1671 | if (sigchld_deferred) | |
1672 | kill (getpid (), SIGCHLD); | |
1673 | #endif | |
1674 | #endif /* ordinary USG */ | |
1675 | #endif /* not BSD4_1 */ | |
1676 | #endif /* SIGCHLD */ | |
0dc70c33 | 1677 | #endif /* !POSIX_SIGNALS */ |
4a127b3b KH |
1678 | |
1679 | /* Now generate the error if vfork failed. */ | |
1680 | if (pid < 0) | |
1681 | report_file_error ("Doing vfork", Qnil); | |
d0d6b7c5 JB |
1682 | } |
1683 | #endif /* not VMS */ | |
1684 | ||
1685 | #ifdef HAVE_SOCKETS | |
1686 | ||
1687 | /* open a TCP network connection to a given HOST/SERVICE. Treated | |
1688 | exactly like a normal process when reading and writing. Only | |
1689 | differences are in status display and process deletion. A network | |
1690 | connection has no PID; you cannot signal it. All you can do is | |
1691 | deactivate and close it via delete-process */ | |
1692 | ||
1693 | DEFUN ("open-network-stream", Fopen_network_stream, Sopen_network_stream, | |
1694 | 4, 4, 0, | |
1695 | "Open a TCP connection for a service to a host.\n\ | |
1696 | Returns a subprocess-object to represent the connection.\n\ | |
1697 | Input and output work as for subprocesses; `delete-process' closes it.\n\ | |
1698 | Args are NAME BUFFER HOST SERVICE.\n\ | |
1699 | NAME is name for process. It is modified if necessary to make it unique.\n\ | |
1700 | BUFFER is the buffer (or buffer-name) to associate with the process.\n\ | |
1701 | Process output goes at end of that buffer, unless you specify\n\ | |
1702 | an output stream or filter function to handle the output.\n\ | |
1703 | BUFFER may be also nil, meaning that this process is not associated\n\ | |
1704 | with any buffer\n\ | |
1705 | Third arg is name of the host to connect to, or its IP address.\n\ | |
1706 | Fourth arg SERVICE is name of the service desired, or an integer\n\ | |
1707 | specifying a port number to connect to.") | |
1708 | (name, buffer, host, service) | |
1709 | Lisp_Object name, buffer, host, service; | |
1710 | { | |
1711 | Lisp_Object proc; | |
1712 | register int i; | |
1713 | struct sockaddr_in address; | |
1714 | struct servent *svc_info; | |
1715 | struct hostent *host_info_ptr, host_info; | |
1716 | char *(addr_list[2]); | |
79967d5e | 1717 | IN_ADDR numeric_addr; |
d0d6b7c5 JB |
1718 | int s, outch, inch; |
1719 | char errstring[80]; | |
1720 | int port; | |
1721 | struct hostent host_info_fixed; | |
1722 | struct gcpro gcpro1, gcpro2, gcpro3, gcpro4; | |
e333e864 | 1723 | int retry = 0; |
44ade2e9 | 1724 | int count = specpdl_ptr - specpdl; |
d0d6b7c5 | 1725 | |
bff3ed0a RS |
1726 | #ifdef WINDOWSNT |
1727 | /* Ensure socket support is loaded if available. */ | |
1728 | init_winsock (TRUE); | |
1729 | #endif | |
1730 | ||
d0d6b7c5 JB |
1731 | GCPRO4 (name, buffer, host, service); |
1732 | CHECK_STRING (name, 0); | |
1733 | CHECK_STRING (host, 0); | |
bcd69aea | 1734 | if (INTEGERP (service)) |
d0d6b7c5 JB |
1735 | port = htons ((unsigned short) XINT (service)); |
1736 | else | |
1737 | { | |
1738 | CHECK_STRING (service, 0); | |
1739 | svc_info = getservbyname (XSTRING (service)->data, "tcp"); | |
1740 | if (svc_info == 0) | |
1741 | error ("Unknown service \"%s\"", XSTRING (service)->data); | |
1742 | port = svc_info->s_port; | |
1743 | } | |
1744 | ||
798b64bb KH |
1745 | /* Slow down polling to every ten seconds. |
1746 | Some kernels have a bug which causes retrying connect to fail | |
1747 | after a connect. Polling can interfere with gethostbyname too. */ | |
1748 | #ifdef POLL_FOR_INPUT | |
1749 | bind_polling_period (10); | |
1750 | #endif | |
1751 | ||
1d2c16fa | 1752 | #ifndef TERM |
616da37c RS |
1753 | while (1) |
1754 | { | |
5f0929a7 RS |
1755 | #ifdef TRY_AGAIN |
1756 | h_errno = 0; | |
1757 | #endif | |
5d6c2aa3 RS |
1758 | immediate_quit = 1; |
1759 | QUIT; | |
616da37c | 1760 | host_info_ptr = gethostbyname (XSTRING (host)->data); |
5d6c2aa3 | 1761 | immediate_quit = 0; |
616da37c RS |
1762 | #ifdef TRY_AGAIN |
1763 | if (! (host_info_ptr == 0 && h_errno == TRY_AGAIN)) | |
1764 | #endif | |
1765 | break; | |
1766 | Fsleep_for (make_number (1), Qnil); | |
1767 | } | |
d0d6b7c5 JB |
1768 | if (host_info_ptr == 0) |
1769 | /* Attempt to interpret host as numeric inet address */ | |
1770 | { | |
393a9679 | 1771 | numeric_addr = inet_addr ((char *) XSTRING (host)->data); |
79967d5e | 1772 | if (NUMERIC_ADDR_ERROR) |
d0d6b7c5 JB |
1773 | error ("Unknown host \"%s\"", XSTRING (host)->data); |
1774 | ||
1775 | host_info_ptr = &host_info; | |
1776 | host_info.h_name = 0; | |
1777 | host_info.h_aliases = 0; | |
1778 | host_info.h_addrtype = AF_INET; | |
39a21be6 JB |
1779 | #ifdef h_addr |
1780 | /* Older machines have only one address slot called h_addr. | |
1781 | Newer machines have h_addr_list, but #define h_addr to | |
1782 | be its first element. */ | |
1783 | host_info.h_addr_list = &(addr_list[0]); | |
1784 | #endif | |
1785 | host_info.h_addr = (char*)(&numeric_addr); | |
d0d6b7c5 | 1786 | addr_list[1] = 0; |
8777fbe2 RS |
1787 | /* numeric_addr isn't null-terminated; it has fixed length. */ |
1788 | host_info.h_length = sizeof (numeric_addr); | |
d0d6b7c5 JB |
1789 | } |
1790 | ||
1791 | bzero (&address, sizeof address); | |
1792 | bcopy (host_info_ptr->h_addr, (char *) &address.sin_addr, | |
1793 | host_info_ptr->h_length); | |
1794 | address.sin_family = host_info_ptr->h_addrtype; | |
1795 | address.sin_port = port; | |
1796 | ||
1797 | s = socket (host_info_ptr->h_addrtype, SOCK_STREAM, 0); | |
1798 | if (s < 0) | |
1799 | report_file_error ("error creating socket", Fcons (name, Qnil)); | |
1800 | ||
457a9bee RS |
1801 | /* Kernel bugs (on Ultrix at least) cause lossage (not just EINTR) |
1802 | when connect is interrupted. So let's not let it get interrupted. | |
1803 | Note we do not turn off polling, because polling is only used | |
1804 | when not interrupt_input, and thus not normally used on the systems | |
1805 | which have this bug. On systems which use polling, there's no way | |
1806 | to quit if polling is turned off. */ | |
1807 | if (interrupt_input) | |
1808 | unrequest_sigio (); | |
1809 | ||
d0d6b7c5 | 1810 | loop: |
0f2ee0c1 RS |
1811 | |
1812 | immediate_quit = 1; | |
1813 | QUIT; | |
1814 | ||
e333e864 RS |
1815 | if (connect (s, (struct sockaddr *) &address, sizeof address) == -1 |
1816 | && errno != EISCONN) | |
d0d6b7c5 JB |
1817 | { |
1818 | int xerrno = errno; | |
e333e864 | 1819 | |
0f2ee0c1 RS |
1820 | immediate_quit = 0; |
1821 | ||
d0d6b7c5 JB |
1822 | if (errno == EINTR) |
1823 | goto loop; | |
e333e864 RS |
1824 | if (errno == EADDRINUSE && retry < 20) |
1825 | { | |
4590788a RS |
1826 | /* A delay here is needed on some FreeBSD systems, |
1827 | and it is harmless, since this retrying takes time anyway | |
1828 | and should be infrequent. */ | |
1829 | Fsleep_for (make_number (1), Qnil); | |
e333e864 RS |
1830 | retry++; |
1831 | goto loop; | |
1832 | } | |
1833 | ||
d0d6b7c5 | 1834 | close (s); |
457a9bee RS |
1835 | |
1836 | if (interrupt_input) | |
1837 | request_sigio (); | |
1838 | ||
d0d6b7c5 JB |
1839 | errno = xerrno; |
1840 | report_file_error ("connection failed", | |
1841 | Fcons (host, Fcons (name, Qnil))); | |
1842 | } | |
457a9bee | 1843 | |
0f2ee0c1 RS |
1844 | immediate_quit = 0; |
1845 | ||
44ade2e9 RS |
1846 | #ifdef POLL_FOR_INPUT |
1847 | unbind_to (count, Qnil); | |
1848 | #endif | |
1849 | ||
457a9bee RS |
1850 | if (interrupt_input) |
1851 | request_sigio (); | |
1852 | ||
1d2c16fa RS |
1853 | #else /* TERM */ |
1854 | s = connect_server (0); | |
1855 | if (s < 0) | |
1856 | report_file_error ("error creating socket", Fcons (name, Qnil)); | |
1857 | send_command (s, C_PORT, 0, "%s:%d", XSTRING (host)->data, ntohs (port)); | |
1858 | send_command (s, C_DUMB, 1, 0); | |
1859 | #endif /* TERM */ | |
d0d6b7c5 JB |
1860 | |
1861 | inch = s; | |
59f23005 | 1862 | outch = s; |
d0d6b7c5 JB |
1863 | |
1864 | if (!NILP (buffer)) | |
1865 | buffer = Fget_buffer_create (buffer); | |
1866 | proc = make_process (name); | |
1867 | ||
1868 | chan_process[inch] = proc; | |
1869 | ||
1870 | #ifdef O_NONBLOCK | |
1871 | fcntl (inch, F_SETFL, O_NONBLOCK); | |
1872 | #else | |
1873 | #ifdef O_NDELAY | |
1874 | fcntl (inch, F_SETFL, O_NDELAY); | |
1875 | #endif | |
1876 | #endif | |
1877 | ||
de282a05 | 1878 | XPROCESS (proc)->childp = Fcons (host, Fcons (service, Qnil)); |
d0d6b7c5 JB |
1879 | XPROCESS (proc)->command_channel_p = Qnil; |
1880 | XPROCESS (proc)->buffer = buffer; | |
1881 | XPROCESS (proc)->sentinel = Qnil; | |
1882 | XPROCESS (proc)->filter = Qnil; | |
1883 | XPROCESS (proc)->command = Qnil; | |
1884 | XPROCESS (proc)->pid = Qnil; | |
7795ff9b | 1885 | XSETINT (XPROCESS (proc)->infd, inch); |
1d056e64 | 1886 | XSETINT (XPROCESS (proc)->outfd, outch); |
d0d6b7c5 JB |
1887 | XPROCESS (proc)->status = Qrun; |
1888 | FD_SET (inch, &input_wait_mask); | |
a69281ff | 1889 | FD_SET (inch, &non_keyboard_wait_mask); |
7d0e672e RS |
1890 | if (inch > max_process_desc) |
1891 | max_process_desc = inch; | |
d0d6b7c5 | 1892 | |
c7580538 KH |
1893 | if (!NILP (buffer) && NILP (XBUFFER (buffer)->enable_multibyte_characters) |
1894 | || NILP (buffer) && NILP (buffer_defaults.enable_multibyte_characters)) | |
1895 | { | |
1896 | XPROCESS (proc)->decode_coding_system = Qnil; | |
1897 | XPROCESS (proc)->encode_coding_system = Qnil; | |
1898 | } | |
1899 | else | |
1900 | { | |
1901 | /* Setup coding systems for communicating with the network stream. */ | |
1902 | struct gcpro gcpro1; | |
1903 | /* Qt denotes that we have not yet called Ffind_coding_system. */ | |
1904 | Lisp_Object coding_systems = Qt; | |
1905 | Lisp_Object args[5], val; | |
0fa1789e | 1906 | |
c7580538 KH |
1907 | if (NILP (val = Vcoding_system_for_read)) |
1908 | { | |
1909 | args[0] = Qopen_network_stream, args[1] = name, | |
1910 | args[2] = buffer, args[3] = host, args[4] = service; | |
1911 | GCPRO1 (proc); | |
1912 | coding_systems = Ffind_coding_system (5, args); | |
1913 | UNGCPRO; | |
83502605 KH |
1914 | if (CONSP (coding_systems)) |
1915 | val = XCONS (coding_systems)->car; | |
1916 | else if (CONSP (Vdefault_process_coding_system)) | |
1917 | val = XCONS (Vdefault_process_coding_system)->car; | |
c7580538 KH |
1918 | } |
1919 | XPROCESS (proc)->decode_coding_system = val; | |
0fa1789e | 1920 | |
c7580538 KH |
1921 | if (NILP (val = Vcoding_system_for_write)) |
1922 | { | |
1923 | if (EQ (coding_systems, Qt)) | |
1924 | { | |
1925 | args[0] = Qopen_network_stream, args[1] = name, | |
1926 | args[2] = buffer, args[3] = host, args[4] = service; | |
1927 | GCPRO1 (proc); | |
1928 | coding_systems = Ffind_coding_system (5, args); | |
1929 | UNGCPRO; | |
1930 | } | |
83502605 KH |
1931 | if (CONSP (coding_systems)) |
1932 | val = XCONS (coding_systems)->cdr; | |
1933 | else if (CONSP (Vdefault_process_coding_system)) | |
1934 | val = XCONS (Vdefault_process_coding_system)->cdr; | |
c7580538 KH |
1935 | } |
1936 | XPROCESS (proc)->encode_coding_system = val; | |
1937 | } | |
0fa1789e | 1938 | |
c7580538 KH |
1939 | if (!proc_decode_coding_system[inch]) |
1940 | proc_decode_coding_system[inch] | |
1941 | = (struct coding_system *) xmalloc (sizeof (struct coding_system)); | |
0fa1789e | 1942 | setup_coding_system (XPROCESS (proc)->decode_coding_system, |
c7580538 KH |
1943 | proc_decode_coding_system[inch]); |
1944 | if (!proc_encode_coding_system[outch]) | |
1945 | proc_encode_coding_system[outch] | |
1946 | = (struct coding_system *) xmalloc (sizeof (struct coding_system)); | |
0fa1789e | 1947 | setup_coding_system (XPROCESS (proc)->encode_coding_system, |
c7580538 | 1948 | proc_encode_coding_system[outch]); |
0fa1789e KH |
1949 | |
1950 | XPROCESS (proc)->decoding_buf = make_uninit_string (0); | |
1951 | XPROCESS (proc)->encoding_buf = make_uninit_string (0); | |
1952 | ||
d0d6b7c5 JB |
1953 | UNGCPRO; |
1954 | return proc; | |
1955 | } | |
1956 | #endif /* HAVE_SOCKETS */ | |
1957 | ||
1958 | deactivate_process (proc) | |
1959 | Lisp_Object proc; | |
1960 | { | |
1961 | register int inchannel, outchannel; | |
1962 | register struct Lisp_Process *p = XPROCESS (proc); | |
1963 | ||
a9f2c884 RS |
1964 | inchannel = XINT (p->infd); |
1965 | outchannel = XINT (p->outfd); | |
d0d6b7c5 | 1966 | |
a9f2c884 | 1967 | if (inchannel >= 0) |
d0d6b7c5 JB |
1968 | { |
1969 | /* Beware SIGCHLD hereabouts. */ | |
1970 | flush_pending_output (inchannel); | |
1971 | #ifdef VMS | |
1972 | { | |
1973 | VMS_PROC_STUFF *get_vms_process_pointer (), *vs; | |
1974 | sys$dassgn (outchannel); | |
c6c6865d | 1975 | vs = get_vms_process_pointer (p->pid); |
d0d6b7c5 JB |
1976 | if (vs) |
1977 | give_back_vms_process_stuff (vs); | |
1978 | } | |
1979 | #else | |
1980 | close (inchannel); | |
a9f2c884 | 1981 | if (outchannel >= 0 && outchannel != inchannel) |
d0d6b7c5 JB |
1982 | close (outchannel); |
1983 | #endif | |
1984 | ||
1d056e64 KH |
1985 | XSETINT (p->infd, -1); |
1986 | XSETINT (p->outfd, -1); | |
d0d6b7c5 JB |
1987 | chan_process[inchannel] = Qnil; |
1988 | FD_CLR (inchannel, &input_wait_mask); | |
a69281ff | 1989 | FD_CLR (inchannel, &non_keyboard_wait_mask); |
7d0e672e RS |
1990 | if (inchannel == max_process_desc) |
1991 | { | |
1992 | int i; | |
1993 | /* We just closed the highest-numbered process input descriptor, | |
1994 | so recompute the highest-numbered one now. */ | |
1995 | max_process_desc = 0; | |
1996 | for (i = 0; i < MAXDESC; i++) | |
1997 | if (!NILP (chan_process[i])) | |
1998 | max_process_desc = i; | |
1999 | } | |
d0d6b7c5 JB |
2000 | } |
2001 | } | |
2002 | ||
2003 | /* Close all descriptors currently in use for communication | |
2004 | with subprocess. This is used in a newly-forked subprocess | |
2005 | to get rid of irrelevant descriptors. */ | |
2006 | ||
2007 | close_process_descs () | |
2008 | { | |
e98d950b | 2009 | #ifndef WINDOWSNT |
d0d6b7c5 JB |
2010 | int i; |
2011 | for (i = 0; i < MAXDESC; i++) | |
2012 | { | |
2013 | Lisp_Object process; | |
2014 | process = chan_process[i]; | |
2015 | if (!NILP (process)) | |
2016 | { | |
a9f2c884 RS |
2017 | int in = XINT (XPROCESS (process)->infd); |
2018 | int out = XINT (XPROCESS (process)->outfd); | |
2019 | if (in >= 0) | |
d0d6b7c5 | 2020 | close (in); |
a9f2c884 | 2021 | if (out >= 0 && in != out) |
d0d6b7c5 JB |
2022 | close (out); |
2023 | } | |
2024 | } | |
e98d950b | 2025 | #endif |
d0d6b7c5 JB |
2026 | } |
2027 | \f | |
2028 | DEFUN ("accept-process-output", Faccept_process_output, Saccept_process_output, | |
2029 | 0, 3, 0, | |
2030 | "Allow any pending output from subprocesses to be read by Emacs.\n\ | |
2031 | It is read into the process' buffers or given to their filter functions.\n\ | |
2032 | Non-nil arg PROCESS means do not return until some output has been received\n\ | |
2033 | from PROCESS.\n\ | |
2034 | Non-nil second arg TIMEOUT and third arg TIMEOUT-MSECS are number of\n\ | |
2035 | seconds and microseconds to wait; return after that much time whether\n\ | |
2036 | or not there is input.\n\ | |
2037 | Return non-nil iff we received any output before the timeout expired.") | |
4ee3e309 EN |
2038 | (process, timeout, timeout_msecs) |
2039 | register Lisp_Object process, timeout, timeout_msecs; | |
d0d6b7c5 JB |
2040 | { |
2041 | int seconds; | |
2042 | int useconds; | |
2043 | ||
2044 | if (! NILP (timeout_msecs)) | |
2045 | { | |
2046 | CHECK_NUMBER (timeout_msecs, 2); | |
2047 | useconds = XINT (timeout_msecs); | |
bcd69aea | 2048 | if (!INTEGERP (timeout)) |
1d056e64 | 2049 | XSETINT (timeout, 0); |
d0d6b7c5 JB |
2050 | |
2051 | { | |
2052 | int carry = useconds / 1000000; | |
2053 | ||
2054 | XSETINT (timeout, XINT (timeout) + carry); | |
2055 | useconds -= carry * 1000000; | |
2056 | ||
2057 | /* I think this clause is necessary because C doesn't | |
2058 | guarantee a particular rounding direction for negative | |
2059 | integers. */ | |
2060 | if (useconds < 0) | |
2061 | { | |
2062 | XSETINT (timeout, XINT (timeout) - 1); | |
2063 | useconds += 1000000; | |
2064 | } | |
2065 | } | |
2066 | } | |
de946e5a RS |
2067 | else |
2068 | useconds = 0; | |
d0d6b7c5 JB |
2069 | |
2070 | if (! NILP (timeout)) | |
2071 | { | |
2072 | CHECK_NUMBER (timeout, 1); | |
2073 | seconds = XINT (timeout); | |
ada9a4fd | 2074 | if (seconds < 0 || (seconds == 0 && useconds == 0)) |
d0d6b7c5 JB |
2075 | seconds = -1; |
2076 | } | |
2077 | else | |
2078 | { | |
4ee3e309 | 2079 | if (NILP (process)) |
d0d6b7c5 JB |
2080 | seconds = -1; |
2081 | else | |
2082 | seconds = 0; | |
2083 | } | |
2084 | ||
4ee3e309 EN |
2085 | if (NILP (process)) |
2086 | XSETFASTINT (process, 0); | |
f76475ad | 2087 | |
d0d6b7c5 | 2088 | return |
4ee3e309 | 2089 | (wait_reading_process_input (seconds, useconds, process, 0) |
d0d6b7c5 JB |
2090 | ? Qt : Qnil); |
2091 | } | |
2092 | ||
2093 | /* This variable is different from waiting_for_input in keyboard.c. | |
2094 | It is used to communicate to a lisp process-filter/sentinel (via the | |
2095 | function Fwaiting_for_user_input_p below) whether emacs was waiting | |
2096 | for user-input when that process-filter was called. | |
2097 | waiting_for_input cannot be used as that is by definition 0 when | |
d430ee71 RS |
2098 | lisp code is being evalled. |
2099 | This is also used in record_asynch_buffer_change. | |
2100 | For that purpose, this must be 0 | |
2101 | when not inside wait_reading_process_input. */ | |
d0d6b7c5 JB |
2102 | static int waiting_for_user_input_p; |
2103 | ||
c573ae8e RS |
2104 | /* This is here so breakpoints can be put on it. */ |
2105 | static | |
2106 | wait_reading_process_input_1 () | |
2107 | { | |
2108 | } | |
2109 | ||
d0d6b7c5 JB |
2110 | /* Read and dispose of subprocess output while waiting for timeout to |
2111 | elapse and/or keyboard input to be available. | |
2112 | ||
de6fd4b9 | 2113 | TIME_LIMIT is: |
d0d6b7c5 JB |
2114 | timeout in seconds, or |
2115 | zero for no limit, or | |
2116 | -1 means gobble data immediately available but don't wait for any. | |
2117 | ||
de6fd4b9 RS |
2118 | MICROSECS is: |
2119 | an additional duration to wait, measured in microseconds. | |
2120 | If this is nonzero and time_limit is 0, then the timeout | |
2121 | consists of MICROSECS only. | |
6e4f3667 | 2122 | |
de6fd4b9 | 2123 | READ_KBD is a lisp value: |
d0d6b7c5 JB |
2124 | 0 to ignore keyboard input, or |
2125 | 1 to return when input is available, or | |
84aa3ace | 2126 | -1 meaning caller will actually read the input, so don't throw to |
d0d6b7c5 | 2127 | the quit handler, or |
e6194ffc | 2128 | a cons cell, meaning wait until its car is non-nil |
de6fd4b9 | 2129 | (and gobble terminal input into the buffer if any arrives), or |
f76475ad JB |
2130 | a process object, meaning wait until something arrives from that |
2131 | process. The return value is true iff we read some input from | |
2132 | that process. | |
d0d6b7c5 | 2133 | |
de6fd4b9 | 2134 | DO_DISPLAY != 0 means redisplay should be done to show subprocess |
d0d6b7c5 JB |
2135 | output that arrives. |
2136 | ||
de6fd4b9 | 2137 | If READ_KBD is a pointer to a struct Lisp_Process, then the |
d0d6b7c5 JB |
2138 | function returns true iff we received input from that process |
2139 | before the timeout elapsed. | |
eb8c3be9 | 2140 | Otherwise, return true iff we received input from any process. */ |
d0d6b7c5 JB |
2141 | |
2142 | wait_reading_process_input (time_limit, microsecs, read_kbd, do_display) | |
f76475ad JB |
2143 | int time_limit, microsecs; |
2144 | Lisp_Object read_kbd; | |
2145 | int do_display; | |
d0d6b7c5 JB |
2146 | { |
2147 | register int channel, nfds, m; | |
2148 | static SELECT_TYPE Available; | |
2149 | int xerrno; | |
2150 | Lisp_Object proc; | |
2151 | EMACS_TIME timeout, end_time, garbage; | |
2152 | SELECT_TYPE Atemp; | |
a9f2c884 | 2153 | int wait_channel = -1; |
d0d6b7c5 JB |
2154 | struct Lisp_Process *wait_proc = 0; |
2155 | int got_some_input = 0; | |
84aa3ace | 2156 | Lisp_Object *wait_for_cell = 0; |
d0d6b7c5 JB |
2157 | |
2158 | FD_ZERO (&Available); | |
2159 | ||
f76475ad JB |
2160 | /* If read_kbd is a process to watch, set wait_proc and wait_channel |
2161 | accordingly. */ | |
bcd69aea | 2162 | if (PROCESSP (read_kbd)) |
d0d6b7c5 | 2163 | { |
f76475ad | 2164 | wait_proc = XPROCESS (read_kbd); |
a9f2c884 | 2165 | wait_channel = XINT (wait_proc->infd); |
22719df2 | 2166 | XSETFASTINT (read_kbd, 0); |
d0d6b7c5 JB |
2167 | } |
2168 | ||
84aa3ace | 2169 | /* If waiting for non-nil in a cell, record where. */ |
bcd69aea | 2170 | if (CONSP (read_kbd)) |
84aa3ace RS |
2171 | { |
2172 | wait_for_cell = &XCONS (read_kbd)->car; | |
22719df2 | 2173 | XSETFASTINT (read_kbd, 0); |
84aa3ace RS |
2174 | } |
2175 | ||
f76475ad | 2176 | waiting_for_user_input_p = XINT (read_kbd); |
d0d6b7c5 JB |
2177 | |
2178 | /* Since we may need to wait several times, | |
2179 | compute the absolute time to return at. */ | |
2180 | if (time_limit || microsecs) | |
2181 | { | |
2182 | EMACS_GET_TIME (end_time); | |
2183 | EMACS_SET_SECS_USECS (timeout, time_limit, microsecs); | |
2184 | EMACS_ADD_TIME (end_time, end_time, timeout); | |
2185 | } | |
e07d5449 KH |
2186 | #ifdef hpux |
2187 | /* AlainF 5-Jul-1996 | |
2188 | HP-UX 10.10 seem to have problems with signals coming in | |
2189 | Causes "poll: interrupted system call" messages when Emacs is run | |
2190 | in an X window | |
2191 | Turn off periodic alarms (in case they are in use) */ | |
2192 | stop_polling (); | |
2193 | #endif | |
d0d6b7c5 | 2194 | |
d0d6b7c5 JB |
2195 | while (1) |
2196 | { | |
c0239a0b RS |
2197 | int timeout_reduced_for_timers = 0; |
2198 | ||
d0d6b7c5 JB |
2199 | /* If calling from keyboard input, do not quit |
2200 | since we want to return C-g as an input character. | |
2201 | Otherwise, do pending quit if requested. */ | |
f76475ad | 2202 | if (XINT (read_kbd) >= 0) |
d0d6b7c5 JB |
2203 | QUIT; |
2204 | ||
889255b4 RS |
2205 | /* Exit now if the cell we're waiting for became non-nil. */ |
2206 | if (wait_for_cell && ! NILP (*wait_for_cell)) | |
2207 | break; | |
2208 | ||
d0d6b7c5 JB |
2209 | /* Compute time from now till when time limit is up */ |
2210 | /* Exit if already run out */ | |
2211 | if (time_limit == -1) | |
2212 | { | |
2213 | /* -1 specified for timeout means | |
2214 | gobble output available now | |
2215 | but don't wait at all. */ | |
2216 | ||
2217 | EMACS_SET_SECS_USECS (timeout, 0, 0); | |
2218 | } | |
2219 | else if (time_limit || microsecs) | |
2220 | { | |
2221 | EMACS_GET_TIME (timeout); | |
2222 | EMACS_SUB_TIME (timeout, end_time, timeout); | |
2223 | if (EMACS_TIME_NEG_P (timeout)) | |
2224 | break; | |
2225 | } | |
2226 | else | |
2227 | { | |
2228 | EMACS_SET_SECS_USECS (timeout, 100000, 0); | |
2229 | } | |
2230 | ||
f854a00b RS |
2231 | /* Normally we run timers here. |
2232 | But not if wait_for_cell; in those cases, | |
2233 | the wait is supposed to be short, | |
2234 | and those callers cannot handle running arbitrary Lisp code here. */ | |
2235 | if (! wait_for_cell) | |
fb4c3627 | 2236 | { |
c0239a0b | 2237 | EMACS_TIME timer_delay; |
c573ae8e RS |
2238 | int old_timers_run; |
2239 | ||
2240 | retry: | |
2241 | old_timers_run = timers_run; | |
c0239a0b | 2242 | timer_delay = timer_check (1); |
5de50bfb | 2243 | if (timers_run != old_timers_run && do_display) |
c573ae8e RS |
2244 | { |
2245 | redisplay_preserve_echo_area (); | |
2246 | /* We must retry, since a timer may have requeued itself | |
2247 | and that could alter the time_delay. */ | |
2248 | goto retry; | |
2249 | } | |
2250 | ||
69645afc RS |
2251 | /* If there is unread keyboard input, also return. */ |
2252 | if (XINT (read_kbd) != 0 | |
2253 | && requeued_events_pending_p ()) | |
2254 | break; | |
2255 | ||
c0239a0b | 2256 | if (! EMACS_TIME_NEG_P (timer_delay) && time_limit != -1) |
fb4c3627 RS |
2257 | { |
2258 | EMACS_TIME difference; | |
2259 | EMACS_SUB_TIME (difference, timer_delay, timeout); | |
2260 | if (EMACS_TIME_NEG_P (difference)) | |
c0239a0b RS |
2261 | { |
2262 | timeout = timer_delay; | |
2263 | timeout_reduced_for_timers = 1; | |
2264 | } | |
fb4c3627 | 2265 | } |
4abca5e7 RS |
2266 | /* If time_limit is -1, we are not going to wait at all. */ |
2267 | else if (time_limit != -1) | |
c573ae8e RS |
2268 | { |
2269 | /* This is so a breakpoint can be put here. */ | |
2270 | wait_reading_process_input_1 (); | |
2271 | } | |
fb4c3627 RS |
2272 | } |
2273 | ||
90ab1a81 JB |
2274 | /* Cause C-g and alarm signals to take immediate action, |
2275 | and cause input available signals to zero out timeout. | |
2276 | ||
2277 | It is important that we do this before checking for process | |
2278 | activity. If we get a SIGCHLD after the explicit checks for | |
2279 | process activity, timeout is the only way we will know. */ | |
2280 | if (XINT (read_kbd) < 0) | |
2281 | set_waiting_for_input (&timeout); | |
2282 | ||
6be429b1 JB |
2283 | /* If status of something has changed, and no input is |
2284 | available, notify the user of the change right away. After | |
2285 | this explicit check, we'll let the SIGCHLD handler zap | |
2286 | timeout to get our attention. */ | |
2287 | if (update_tick != process_tick && do_display) | |
2288 | { | |
2289 | Atemp = input_wait_mask; | |
2290 | EMACS_SET_SECS_USECS (timeout, 0, 0); | |
ecd1f654 KH |
2291 | if ((select (MAXDESC, &Atemp, (SELECT_TYPE *)0, (SELECT_TYPE *)0, |
2292 | &timeout) | |
2293 | <= 0)) | |
90ab1a81 JB |
2294 | { |
2295 | /* It's okay for us to do this and then continue with | |
a0e4d3f3 | 2296 | the loop, since timeout has already been zeroed out. */ |
90ab1a81 JB |
2297 | clear_waiting_for_input (); |
2298 | status_notify (); | |
2299 | } | |
6be429b1 JB |
2300 | } |
2301 | ||
2302 | /* Don't wait for output from a non-running process. */ | |
2303 | if (wait_proc != 0 && !NILP (wait_proc->raw_status_low)) | |
2304 | update_status (wait_proc); | |
2305 | if (wait_proc != 0 | |
2306 | && ! EQ (wait_proc->status, Qrun)) | |
9aa2a7f4 | 2307 | { |
7ce63188 RS |
2308 | int nread, total_nread; |
2309 | ||
9aa2a7f4 | 2310 | clear_waiting_for_input (); |
7ce63188 RS |
2311 | XSETPROCESS (proc, wait_proc); |
2312 | ||
2313 | /* Read data from the process, until we exhaust it. */ | |
1c0707fd RS |
2314 | while (XINT (wait_proc->infd) >= 0 |
2315 | && nread = read_process_output (proc, XINT (wait_proc->infd))) | |
7ce63188 RS |
2316 | total_nread += nread; |
2317 | if (total_nread > 0 && do_display) | |
2318 | redisplay_preserve_echo_area (); | |
2319 | ||
9aa2a7f4 JB |
2320 | break; |
2321 | } | |
6be429b1 | 2322 | |
d0d6b7c5 JB |
2323 | /* Wait till there is something to do */ |
2324 | ||
b5dc1c83 RS |
2325 | if (wait_for_cell) |
2326 | Available = non_process_wait_mask; | |
2327 | else if (! XINT (read_kbd)) | |
a69281ff RS |
2328 | Available = non_keyboard_wait_mask; |
2329 | else | |
2330 | Available = input_wait_mask; | |
d0d6b7c5 | 2331 | |
ff11dfa1 | 2332 | /* If frame size has changed or the window is newly mapped, |
ffd56f97 JB |
2333 | redisplay now, before we start to wait. There is a race |
2334 | condition here; if a SIGIO arrives between now and the select | |
016899c0 JB |
2335 | and indicates that a frame is trashed, the select may block |
2336 | displaying a trashed screen. */ | |
5164ee8e | 2337 | if (frame_garbaged && do_display) |
7286affd RS |
2338 | { |
2339 | clear_waiting_for_input (); | |
2340 | redisplay_preserve_echo_area (); | |
2341 | if (XINT (read_kbd) < 0) | |
7efe788e | 2342 | set_waiting_for_input (&timeout); |
7286affd | 2343 | } |
ffd56f97 | 2344 | |
0a65b032 RS |
2345 | if (XINT (read_kbd) && detect_input_pending ()) |
2346 | { | |
2347 | nfds = 0; | |
2348 | FD_ZERO (&Available); | |
2349 | } | |
2350 | else | |
2351 | nfds = select (MAXDESC, &Available, (SELECT_TYPE *)0, (SELECT_TYPE *)0, | |
2352 | &timeout); | |
6720a7fb | 2353 | |
d0d6b7c5 JB |
2354 | xerrno = errno; |
2355 | ||
2356 | /* Make C-g and alarm signals set flags again */ | |
2357 | clear_waiting_for_input (); | |
2358 | ||
2359 | /* If we woke up due to SIGWINCH, actually change size now. */ | |
2360 | do_pending_window_change (); | |
2361 | ||
c0239a0b RS |
2362 | if (time_limit && nfds == 0 && ! timeout_reduced_for_timers) |
2363 | /* We wanted the full specified time, so return now. */ | |
d0d6b7c5 JB |
2364 | break; |
2365 | if (nfds < 0) | |
2366 | { | |
2367 | if (xerrno == EINTR) | |
2368 | FD_ZERO (&Available); | |
b0310da4 JB |
2369 | #ifdef ultrix |
2370 | /* Ultrix select seems to return ENOMEM when it is | |
2371 | interrupted. Treat it just like EINTR. Bleah. Note | |
2372 | that we want to test for the "ultrix" CPP symbol, not | |
2373 | "__ultrix__"; the latter is only defined under GCC, but | |
2374 | not by DEC's bundled CC. -JimB */ | |
8058415c JB |
2375 | else if (xerrno == ENOMEM) |
2376 | FD_ZERO (&Available); | |
2377 | #endif | |
d0d6b7c5 JB |
2378 | #ifdef ALLIANT |
2379 | /* This happens for no known reason on ALLIANT. | |
2380 | I am guessing that this is the right response. -- RMS. */ | |
2381 | else if (xerrno == EFAULT) | |
2382 | FD_ZERO (&Available); | |
2383 | #endif | |
2384 | else if (xerrno == EBADF) | |
2385 | { | |
2386 | #ifdef AIX | |
2387 | /* AIX doesn't handle PTY closure the same way BSD does. On AIX, | |
2388 | the child's closure of the pts gives the parent a SIGHUP, and | |
2389 | the ptc file descriptor is automatically closed, | |
2390 | yielding EBADF here or at select() call above. | |
2391 | So, SIGHUP is ignored (see def of PTY_TTY_NAME_SPRINTF | |
a0e4d3f3 | 2392 | in m/ibmrt-aix.h), and here we just ignore the select error. |
d0d6b7c5 | 2393 | Cleanup occurs c/o status_notify after SIGCLD. */ |
ffd56f97 | 2394 | FD_ZERO (&Available); /* Cannot depend on values returned */ |
d0d6b7c5 JB |
2395 | #else |
2396 | abort (); | |
2397 | #endif | |
2398 | } | |
2399 | else | |
6ed6233b | 2400 | error ("select error: %s", strerror (xerrno)); |
d0d6b7c5 | 2401 | } |
26ec91de | 2402 | #if defined(sun) && !defined(USG5_4) |
a69281ff | 2403 | else if (nfds > 0 && keyboard_bit_set (&Available) |
dd2281ae | 2404 | && interrupt_input) |
e0109153 JB |
2405 | /* System sometimes fails to deliver SIGIO. |
2406 | ||
2407 | David J. Mackenzie says that Emacs doesn't compile under | |
2408 | Solaris if this code is enabled, thus the USG5_4 in the CPP | |
2409 | conditional. "I haven't noticed any ill effects so far. | |
2410 | If you find a Solaris expert somewhere, they might know | |
2411 | better." */ | |
d0d6b7c5 JB |
2412 | kill (getpid (), SIGIO); |
2413 | #endif | |
2414 | ||
2415 | /* Check for keyboard input */ | |
2416 | /* If there is any, return immediately | |
2417 | to give it higher priority than subprocesses */ | |
2418 | ||
f854a00b | 2419 | if ((XINT (read_kbd) != 0) |
5d6c2aa3 | 2420 | && detect_input_pending_run_timers (do_display)) |
6ed6233b KH |
2421 | { |
2422 | swallow_events (do_display); | |
5d6c2aa3 | 2423 | if (detect_input_pending_run_timers (do_display)) |
6ed6233b KH |
2424 | break; |
2425 | } | |
2426 | ||
69645afc RS |
2427 | /* If there is unread keyboard input, also return. */ |
2428 | if (XINT (read_kbd) != 0 | |
2429 | && requeued_events_pending_p ()) | |
2430 | break; | |
2431 | ||
f854a00b RS |
2432 | /* If wait_for_cell. check for keyboard input |
2433 | but don't run any timers. | |
2434 | ??? (It seems wrong to me to check for keyboard | |
2435 | input at all when wait_for_cell, but the code | |
2436 | has been this way since July 1994. | |
2437 | Try changing this after version 19.31.) */ | |
2438 | if (wait_for_cell | |
2439 | && detect_input_pending ()) | |
2440 | { | |
2441 | swallow_events (do_display); | |
2442 | if (detect_input_pending ()) | |
2443 | break; | |
2444 | } | |
2445 | ||
84aa3ace RS |
2446 | /* Exit now if the cell we're waiting for became non-nil. */ |
2447 | if (wait_for_cell && ! NILP (*wait_for_cell)) | |
2448 | break; | |
2449 | ||
4746118a | 2450 | #ifdef SIGIO |
d0d6b7c5 JB |
2451 | /* If we think we have keyboard input waiting, but didn't get SIGIO |
2452 | go read it. This can happen with X on BSD after logging out. | |
2453 | In that case, there really is no input and no SIGIO, | |
2454 | but select says there is input. */ | |
2455 | ||
dd2281ae | 2456 | if (XINT (read_kbd) && interrupt_input |
a69281ff | 2457 | && (keyboard_bit_set (&Available))) |
e643c5be | 2458 | kill (getpid (), SIGIO); |
4746118a | 2459 | #endif |
d0d6b7c5 | 2460 | |
d0d6b7c5 JB |
2461 | if (! wait_proc) |
2462 | got_some_input |= nfds > 0; | |
2463 | ||
32676c08 JB |
2464 | /* If checking input just got us a size-change event from X, |
2465 | obey it now if we should. */ | |
97f3b3d6 | 2466 | if (XINT (read_kbd) || wait_for_cell) |
32676c08 JB |
2467 | do_pending_window_change (); |
2468 | ||
a9f2c884 RS |
2469 | /* Check for data from a process. */ |
2470 | /* Really FIRST_PROC_DESC should be 0 on Unix, | |
2471 | but this is safer in the short run. */ | |
a69281ff | 2472 | for (channel = 0; channel <= max_process_desc; channel++) |
d0d6b7c5 | 2473 | { |
a69281ff RS |
2474 | if (FD_ISSET (channel, &Available) |
2475 | && FD_ISSET (channel, &non_keyboard_wait_mask)) | |
d0d6b7c5 JB |
2476 | { |
2477 | int nread; | |
2478 | ||
2479 | /* If waiting for this channel, arrange to return as | |
2480 | soon as no more input to be processed. No more | |
2481 | waiting. */ | |
2482 | if (wait_channel == channel) | |
2483 | { | |
a9f2c884 | 2484 | wait_channel = -1; |
d0d6b7c5 JB |
2485 | time_limit = -1; |
2486 | got_some_input = 1; | |
2487 | } | |
2488 | proc = chan_process[channel]; | |
2489 | if (NILP (proc)) | |
2490 | continue; | |
2491 | ||
d0d6b7c5 JB |
2492 | /* Read data from the process, starting with our |
2493 | buffered-ahead character if we have one. */ | |
2494 | ||
2495 | nread = read_process_output (proc, channel); | |
2496 | if (nread > 0) | |
2497 | { | |
2498 | /* Since read_process_output can run a filter, | |
2499 | which can call accept-process-output, | |
2500 | don't try to read from any other processes | |
2501 | before doing the select again. */ | |
2502 | FD_ZERO (&Available); | |
2503 | ||
2504 | if (do_display) | |
2505 | redisplay_preserve_echo_area (); | |
2506 | } | |
2507 | #ifdef EWOULDBLOCK | |
2508 | else if (nread == -1 && errno == EWOULDBLOCK) | |
2509 | ; | |
0b75e9a4 | 2510 | #endif |
89d7280d RS |
2511 | /* ISC 4.1 defines both EWOULDBLOCK and O_NONBLOCK, |
2512 | and Emacs uses O_NONBLOCK, so what we get is EAGAIN. */ | |
d0d6b7c5 JB |
2513 | #ifdef O_NONBLOCK |
2514 | else if (nread == -1 && errno == EAGAIN) | |
2515 | ; | |
2516 | #else | |
2517 | #ifdef O_NDELAY | |
2518 | else if (nread == -1 && errno == EAGAIN) | |
2519 | ; | |
2520 | /* Note that we cannot distinguish between no input | |
2521 | available now and a closed pipe. | |
2522 | With luck, a closed pipe will be accompanied by | |
2523 | subprocess termination and SIGCHLD. */ | |
2524 | else if (nread == 0 && !NETCONN_P (proc)) | |
2525 | ; | |
ffd56f97 JB |
2526 | #endif /* O_NDELAY */ |
2527 | #endif /* O_NONBLOCK */ | |
d0d6b7c5 JB |
2528 | #ifdef HAVE_PTYS |
2529 | /* On some OSs with ptys, when the process on one end of | |
2530 | a pty exits, the other end gets an error reading with | |
2531 | errno = EIO instead of getting an EOF (0 bytes read). | |
2532 | Therefore, if we get an error reading and errno = | |
2533 | EIO, just continue, because the child process has | |
2534 | exited and should clean itself up soon (e.g. when we | |
2535 | get a SIGCHLD). */ | |
2536 | else if (nread == -1 && errno == EIO) | |
2537 | ; | |
ffd56f97 JB |
2538 | #endif /* HAVE_PTYS */ |
2539 | /* If we can detect process termination, don't consider the process | |
2540 | gone just because its pipe is closed. */ | |
d0d6b7c5 JB |
2541 | #ifdef SIGCHLD |
2542 | else if (nread == 0 && !NETCONN_P (proc)) | |
2543 | ; | |
2544 | #endif | |
2545 | else | |
2546 | { | |
2547 | /* Preserve status of processes already terminated. */ | |
2548 | XSETINT (XPROCESS (proc)->tick, ++process_tick); | |
2549 | deactivate_process (proc); | |
2550 | if (!NILP (XPROCESS (proc)->raw_status_low)) | |
2551 | update_status (XPROCESS (proc)); | |
2552 | if (EQ (XPROCESS (proc)->status, Qrun)) | |
2553 | XPROCESS (proc)->status | |
2554 | = Fcons (Qexit, Fcons (make_number (256), Qnil)); | |
2555 | } | |
2556 | } | |
ffd56f97 JB |
2557 | } /* end for each file descriptor */ |
2558 | } /* end while exit conditions not met */ | |
d0d6b7c5 | 2559 | |
d430ee71 RS |
2560 | waiting_for_user_input_p = 0; |
2561 | ||
ffd56f97 JB |
2562 | /* If calling from keyboard input, do not quit |
2563 | since we want to return C-g as an input character. | |
2564 | Otherwise, do pending quit if requested. */ | |
f76475ad | 2565 | if (XINT (read_kbd) >= 0) |
ffd56f97 JB |
2566 | { |
2567 | /* Prevent input_pending from remaining set if we quit. */ | |
2568 | clear_input_pending (); | |
2569 | QUIT; | |
2570 | } | |
e07d5449 KH |
2571 | #ifdef hpux |
2572 | /* AlainF 5-Jul-1996 | |
2573 | HP-UX 10.10 seems to have problems with signals coming in | |
2574 | Causes "poll: interrupted system call" messages when Emacs is run | |
2575 | in an X window | |
2576 | Turn periodic alarms back on */ | |
2577 | start_polling(); | |
2578 | #endif | |
2579 | ||
d0d6b7c5 JB |
2580 | return got_some_input; |
2581 | } | |
2582 | \f | |
3b9a3dfa RS |
2583 | /* Given a list (FUNCTION ARGS...), apply FUNCTION to the ARGS. */ |
2584 | ||
2585 | static Lisp_Object | |
2586 | read_process_output_call (fun_and_args) | |
2587 | Lisp_Object fun_and_args; | |
2588 | { | |
2589 | return apply1 (XCONS (fun_and_args)->car, XCONS (fun_and_args)->cdr); | |
2590 | } | |
2591 | ||
2592 | static Lisp_Object | |
2593 | read_process_output_error_handler (error) | |
2594 | Lisp_Object error; | |
2595 | { | |
2596 | cmd_error_internal (error, "error in process filter: "); | |
2597 | Vinhibit_quit = Qt; | |
2598 | update_echo_area (); | |
833ba342 | 2599 | Fsleep_for (make_number (2), Qnil); |
3b9a3dfa RS |
2600 | } |
2601 | ||
0fa1789e KH |
2602 | #ifdef WINDOWSNT |
2603 | #define READ_CHILD_OUTPUT read_child_output | |
2604 | #else | |
2605 | #define READ_CHILD_OUTPUT read | |
2606 | #endif | |
2607 | ||
d0d6b7c5 JB |
2608 | /* Read pending output from the process channel, |
2609 | starting with our buffered-ahead character if we have one. | |
0fa1789e | 2610 | Yield number of decoded characters read. |
d0d6b7c5 JB |
2611 | |
2612 | This function reads at most 1024 characters. | |
2613 | If you want to read all available subprocess output, | |
0fa1789e KH |
2614 | you must call it repeatedly until it returns zero. |
2615 | ||
2616 | The characters read are decoded according to PROC's coding-system | |
2617 | for decoding. */ | |
d0d6b7c5 JB |
2618 | |
2619 | read_process_output (proc, channel) | |
2620 | Lisp_Object proc; | |
2621 | register int channel; | |
2622 | { | |
2623 | register int nchars; | |
d0d6b7c5 | 2624 | char *chars; |
0fa1789e KH |
2625 | #ifdef VMS |
2626 | int chars_allocated = 0; /* If 1, `chars' should be freed later. */ | |
d0d6b7c5 | 2627 | #else |
0fa1789e | 2628 | char buf[1024]; |
d0d6b7c5 JB |
2629 | #endif |
2630 | register Lisp_Object outstream; | |
2631 | register struct buffer *old = current_buffer; | |
2632 | register struct Lisp_Process *p = XPROCESS (proc); | |
2633 | register int opoint; | |
c7580538 | 2634 | struct coding_system *coding = proc_decode_coding_system[channel]; |
0fa1789e KH |
2635 | int chars_in_decoding_buf = 0; /* If 1, `chars' points |
2636 | XSTRING (p->decoding_buf)->data. */ | |
d0d6b7c5 JB |
2637 | |
2638 | #ifdef VMS | |
2639 | VMS_PROC_STUFF *vs, *get_vms_process_pointer(); | |
2640 | ||
2641 | vs = get_vms_process_pointer (p->pid); | |
2642 | if (vs) | |
2643 | { | |
2644 | if (!vs->iosb[0]) | |
2645 | return(0); /* Really weird if it does this */ | |
2646 | if (!(vs->iosb[0] & 1)) | |
2647 | return -1; /* I/O error */ | |
2648 | } | |
2649 | else | |
2650 | error ("Could not get VMS process pointer"); | |
2651 | chars = vs->inputBuffer; | |
2652 | nchars = clean_vms_buffer (chars, vs->iosb[1]); | |
2653 | if (nchars <= 0) | |
2654 | { | |
2655 | start_vms_process_read (vs); /* Crank up the next read on the process */ | |
2656 | return 1; /* Nothing worth printing, say we got 1 */ | |
2657 | } | |
0fa1789e KH |
2658 | if (coding->carryover_size) |
2659 | { | |
2660 | /* The data carried over in the previous decoding should be | |
2661 | prepended to the new data read to decode all together. */ | |
2662 | char *buf = (char *) xmalloc (nchars + coding->carryover_size); | |
2663 | ||
2664 | bcopy (coding->carryover, buf, coding->carryover_size); | |
2665 | bcopy (chars, buf + coding->carryover_size, nchars); | |
2666 | chars = buf; | |
2667 | chars_allocated = 1; | |
2668 | } | |
d0d6b7c5 JB |
2669 | #else /* not VMS */ |
2670 | ||
0fa1789e KH |
2671 | if (coding->carryover_size) |
2672 | /* The data carried over in the previous decoding should be | |
2673 | prepended to the new data read to decode all together. */ | |
2674 | bcopy (coding->carryover, buf, coding->carryover_size); | |
2675 | ||
d0d6b7c5 | 2676 | if (proc_buffered_char[channel] < 0) |
0fa1789e KH |
2677 | nchars = READ_CHILD_OUTPUT (channel, buf + coding->carryover_size, |
2678 | (sizeof buf) - coding->carryover_size); | |
d0d6b7c5 JB |
2679 | else |
2680 | { | |
0fa1789e | 2681 | buf[coding->carryover_size] = proc_buffered_char[channel]; |
d0d6b7c5 | 2682 | proc_buffered_char[channel] = -1; |
0fa1789e KH |
2683 | nchars = READ_CHILD_OUTPUT (channel, buf + coding->carryover_size + 1, |
2684 | (sizeof buf) - coding->carryover_size - 1); | |
d0d6b7c5 JB |
2685 | if (nchars < 0) |
2686 | nchars = 1; | |
2687 | else | |
2688 | nchars = nchars + 1; | |
2689 | } | |
0fa1789e | 2690 | chars = buf; |
d0d6b7c5 JB |
2691 | #endif /* not VMS */ |
2692 | ||
0fa1789e KH |
2693 | /* At this point, NCHARS holds number of characters just received |
2694 | (including the one in proc_buffered_char[channel]). */ | |
d0d6b7c5 JB |
2695 | if (nchars <= 0) return nchars; |
2696 | ||
0fa1789e KH |
2697 | /* Now set NCHARS how many bytes we must decode. */ |
2698 | nchars += coding->carryover_size; | |
2699 | ||
2700 | if (CODING_REQUIRE_CONVERSION (coding)) | |
2701 | { | |
2702 | int require = decoding_buffer_size (coding, nchars); | |
2703 | int consumed, produced; | |
2704 | ||
2705 | if (XSTRING (p->decoding_buf)->size < require) | |
2706 | p->decoding_buf = make_uninit_string (require); | |
2707 | produced = decode_coding (coding, chars, XSTRING (p->decoding_buf)->data, | |
2708 | nchars, XSTRING (p->decoding_buf)->size, | |
2709 | &consumed); | |
2710 | ||
2711 | /* New coding-system might be found by `decode_coding'. */ | |
2712 | if (!EQ (p->decode_coding_system, coding->symbol)) | |
2713 | { | |
2714 | p->decode_coding_system = coding->symbol; | |
2715 | setup_coding_system (coding->symbol, | |
c7580538 | 2716 | proc_decode_coding_system[channel]); |
0fa1789e KH |
2717 | /* If coding-system for encoding is not yet decided, we set it |
2718 | as the same as coding-system for decoding. */ | |
2719 | if (NILP (p->encode_coding_system)) | |
2720 | { | |
2721 | p->encode_coding_system = coding->symbol; | |
2722 | setup_coding_system (coding->symbol, | |
c7580538 | 2723 | proc_encode_coding_system[channel]); |
0fa1789e KH |
2724 | } |
2725 | } | |
2726 | #ifdef VMS | |
2727 | /* Now we don't need the contents of `chars'. */ | |
2728 | if (chars_allocated) | |
2729 | free (chars); | |
2730 | #endif | |
2731 | if (produced == 0) | |
2732 | return 0; | |
2733 | chars = XSTRING (p->decoding_buf)->data; | |
2734 | nchars = produced; | |
2735 | chars_in_decoding_buf = 1; | |
2736 | } | |
2737 | #ifdef VMS | |
2738 | else if (chars_allocated) | |
2739 | { | |
2740 | /* Although we don't have to decode the received data, we must | |
2741 | move it to an area which we don't have to free. */ | |
2742 | if (! STRINGP (p->decoding_buf) | |
2743 | || XSTRING (p->decoding_buf)->size < nchars) | |
2744 | p->decoding_buf = make_uninit_string (nchars); | |
2745 | bcopy (chars, XSTRING (p->decoding_buf)->data, nchars); | |
2746 | free (chars); | |
2747 | chars = XSTRING (p->decoding_buf)->data; | |
2748 | chars_in_decoding_buf = 1; | |
2749 | } | |
2750 | #endif | |
2751 | ||
d0d6b7c5 JB |
2752 | outstream = p->filter; |
2753 | if (!NILP (outstream)) | |
2754 | { | |
2755 | /* We inhibit quit here instead of just catching it so that | |
2756 | hitting ^G when a filter happens to be running won't screw | |
2757 | it up. */ | |
2758 | int count = specpdl_ptr - specpdl; | |
30c78175 | 2759 | Lisp_Object odeactivate; |
dfc21838 | 2760 | Lisp_Object obuffer, okeymap; |
4da2f5be | 2761 | int outer_running_asynch_code = running_asynch_code; |
30c78175 | 2762 | |
dfc21838 RS |
2763 | /* No need to gcpro these, because all we do with them later |
2764 | is test them for EQness, and none of them should be a string. */ | |
30c78175 | 2765 | odeactivate = Vdeactivate_mark; |
dfc21838 RS |
2766 | XSETBUFFER (obuffer, current_buffer); |
2767 | okeymap = current_buffer->keymap; | |
30c78175 | 2768 | |
d0d6b7c5 | 2769 | specbind (Qinhibit_quit, Qt); |
6545aada | 2770 | specbind (Qlast_nonmenu_event, Qt); |
3b9a3dfa | 2771 | |
4da2f5be RS |
2772 | /* In case we get recursively called, |
2773 | and we already saved the match data nonrecursively, | |
2774 | save the same match data in safely recursive fashion. */ | |
2775 | if (outer_running_asynch_code) | |
2776 | { | |
2777 | Lisp_Object tem; | |
2778 | /* Don't clobber the CURRENT match data, either! */ | |
dd130227 | 2779 | tem = Fmatch_data (Qnil, Qnil); |
4da2f5be | 2780 | restore_match_data (); |
dd130227 | 2781 | record_unwind_protect (Fstore_match_data, Fmatch_data (Qnil, Qnil)); |
4da2f5be RS |
2782 | Fstore_match_data (tem); |
2783 | } | |
2784 | ||
2785 | /* For speed, if a search happens within this code, | |
2786 | save the match data in a special nonrecursive fashion. */ | |
7074fde6 | 2787 | running_asynch_code = 1; |
4da2f5be RS |
2788 | |
2789 | /* Read and dispose of the process output. */ | |
3b9a3dfa RS |
2790 | internal_condition_case_1 (read_process_output_call, |
2791 | Fcons (outstream, | |
2792 | Fcons (proc, | |
7074fde6 FP |
2793 | Fcons (make_string (chars, |
2794 | nchars), | |
3b9a3dfa RS |
2795 | Qnil))), |
2796 | !NILP (Vdebug_on_error) ? Qnil : Qerror, | |
2797 | read_process_output_error_handler); | |
4da2f5be RS |
2798 | |
2799 | /* If we saved the match data nonrecursively, restore it now. */ | |
7074fde6 | 2800 | restore_match_data (); |
4da2f5be | 2801 | running_asynch_code = outer_running_asynch_code; |
d0d6b7c5 | 2802 | |
592ce97f | 2803 | /* Handling the process output should not deactivate the mark. */ |
30c78175 RS |
2804 | Vdeactivate_mark = odeactivate; |
2805 | ||
7973cfa8 RS |
2806 | #if 0 /* Call record_asynch_buffer_change unconditionally, |
2807 | because we might have changed minor modes or other things | |
2808 | that affect key bindings. */ | |
dfc21838 RS |
2809 | if (! EQ (Fcurrent_buffer (), obuffer) |
2810 | || ! EQ (current_buffer->keymap, okeymap)) | |
7973cfa8 | 2811 | #endif |
927e08be RS |
2812 | /* But do it only if the caller is actually going to read events. |
2813 | Otherwise there's no need to make him wake up, and it could | |
2814 | cause trouble (for example it would make Fsit_for return). */ | |
2815 | if (waiting_for_user_input_p == -1) | |
2816 | record_asynch_buffer_change (); | |
d72534ba | 2817 | |
d0d6b7c5 JB |
2818 | #ifdef VMS |
2819 | start_vms_process_read (vs); | |
2820 | #endif | |
2ea6d561 | 2821 | unbind_to (count, Qnil); |
d0d6b7c5 JB |
2822 | return nchars; |
2823 | } | |
2824 | ||
2825 | /* If no filter, write into buffer if it isn't dead. */ | |
2826 | if (!NILP (p->buffer) && !NILP (XBUFFER (p->buffer)->name)) | |
2827 | { | |
b0310da4 | 2828 | Lisp_Object old_read_only; |
12ca5cdf | 2829 | int old_begv, old_zv; |
30c78175 | 2830 | Lisp_Object odeactivate; |
12ca5cdf | 2831 | int before; |
30c78175 RS |
2832 | |
2833 | odeactivate = Vdeactivate_mark; | |
d0d6b7c5 JB |
2834 | |
2835 | Fset_buffer (p->buffer); | |
6ec8bbd2 | 2836 | opoint = PT; |
b0310da4 | 2837 | old_read_only = current_buffer->read_only; |
12ca5cdf RS |
2838 | old_begv = BEGV; |
2839 | old_zv = ZV; | |
b0310da4 JB |
2840 | |
2841 | current_buffer->read_only = Qnil; | |
d0d6b7c5 JB |
2842 | |
2843 | /* Insert new output into buffer | |
2844 | at the current end-of-output marker, | |
2845 | thus preserving logical ordering of input and output. */ | |
2846 | if (XMARKER (p->mark)->buffer) | |
53aad33f | 2847 | SET_PT (clip_to_bounds (BEGV, marker_position (p->mark), ZV)); |
d0d6b7c5 JB |
2848 | else |
2849 | SET_PT (ZV); | |
12ca5cdf | 2850 | before = PT; |
b0310da4 JB |
2851 | |
2852 | /* If the output marker is outside of the visible region, save | |
2853 | the restriction and widen. */ | |
6ec8bbd2 | 2854 | if (! (BEGV <= PT && PT <= ZV)) |
b0310da4 JB |
2855 | Fwiden (); |
2856 | ||
d0d6b7c5 JB |
2857 | /* Insert before markers in case we are inserting where |
2858 | the buffer's mark is, and the user's next command is Meta-y. */ | |
0fa1789e KH |
2859 | if (chars_in_decoding_buf) |
2860 | insert_from_string_before_markers (p->decoding_buf, 0, nchars, 0); | |
2861 | else | |
2862 | insert_before_markers (chars, nchars); | |
6ec8bbd2 | 2863 | Fset_marker (p->mark, make_number (PT), p->buffer); |
b0310da4 | 2864 | |
d0d6b7c5 JB |
2865 | update_mode_lines++; |
2866 | ||
12ca5cdf RS |
2867 | /* Make sure opoint and the old restrictions |
2868 | float ahead of any new text just as point would. */ | |
2869 | if (opoint >= before) | |
2870 | opoint += PT - before; | |
2871 | if (old_begv > before) | |
2872 | old_begv += PT - before; | |
2873 | if (old_zv >= before) | |
2874 | old_zv += PT - before; | |
2875 | ||
b0310da4 | 2876 | /* If the restriction isn't what it should be, set it. */ |
12ca5cdf RS |
2877 | if (old_begv != BEGV || old_zv != ZV) |
2878 | Fnarrow_to_region (make_number (old_begv), make_number (old_zv)); | |
b0310da4 | 2879 | |
592ce97f | 2880 | /* Handling the process output should not deactivate the mark. */ |
30c78175 RS |
2881 | Vdeactivate_mark = odeactivate; |
2882 | ||
b0310da4 | 2883 | current_buffer->read_only = old_read_only; |
d0d6b7c5 JB |
2884 | SET_PT (opoint); |
2885 | set_buffer_internal (old); | |
2886 | } | |
2887 | #ifdef VMS | |
2888 | start_vms_process_read (vs); | |
2889 | #endif | |
2890 | return nchars; | |
2891 | } | |
2892 | ||
2893 | DEFUN ("waiting-for-user-input-p", Fwaiting_for_user_input_p, Swaiting_for_user_input_p, | |
2894 | 0, 0, 0, | |
8b4d685f | 2895 | "Returns non-nil if emacs is waiting for input from the user.\n\ |
d0d6b7c5 JB |
2896 | This is intended for use by asynchronous process output filters and sentinels.") |
2897 | () | |
2898 | { | |
8b4d685f | 2899 | return (waiting_for_user_input_p ? Qt : Qnil); |
d0d6b7c5 JB |
2900 | } |
2901 | \f | |
2902 | /* Sending data to subprocess */ | |
2903 | ||
2904 | jmp_buf send_process_frame; | |
2905 | ||
2906 | SIGTYPE | |
2907 | send_process_trap () | |
2908 | { | |
2909 | #ifdef BSD4_1 | |
2910 | sigrelse (SIGPIPE); | |
2911 | sigrelse (SIGALRM); | |
2912 | #endif /* BSD4_1 */ | |
2913 | longjmp (send_process_frame, 1); | |
2914 | } | |
2915 | ||
4556b700 RS |
2916 | /* Send some data to process PROC. |
2917 | BUF is the beginning of the data; LEN is the number of characters. | |
0fa1789e KH |
2918 | OBJECT is the Lisp object that the data comes from. |
2919 | ||
2920 | The data is encoded by PROC's coding-system for encoding before it | |
2921 | is sent. But if the data ends at the middle of multi-byte | |
2922 | representation, that incomplete sequence of bytes are sent without | |
2923 | being encoded. Should we store them in a buffer to prepend them to | |
2924 | the data send later? */ | |
4556b700 RS |
2925 | |
2926 | send_process (proc, buf, len, object) | |
ecd1f654 | 2927 | volatile Lisp_Object proc; |
d0d6b7c5 JB |
2928 | char *buf; |
2929 | int len; | |
4556b700 | 2930 | Lisp_Object object; |
d0d6b7c5 | 2931 | { |
ecd1f654 | 2932 | /* Use volatile to protect variables from being clobbered by longjmp. */ |
d0d6b7c5 | 2933 | int rv; |
ecd1f654 | 2934 | volatile unsigned char *procname = XSTRING (XPROCESS (proc)->name)->data; |
0fa1789e | 2935 | struct coding_system *coding; |
6044e593 RS |
2936 | struct gcpro gcpro1; |
2937 | ||
2938 | GCPRO1 (object); | |
d0d6b7c5 | 2939 | |
d0d6b7c5 JB |
2940 | #ifdef VMS |
2941 | struct Lisp_Process *p = XPROCESS (proc); | |
2942 | VMS_PROC_STUFF *vs, *get_vms_process_pointer(); | |
2943 | #endif /* VMS */ | |
2944 | ||
2945 | if (! NILP (XPROCESS (proc)->raw_status_low)) | |
2946 | update_status (XPROCESS (proc)); | |
2947 | if (! EQ (XPROCESS (proc)->status, Qrun)) | |
2948 | error ("Process %s not running", procname); | |
0fa1789e KH |
2949 | if (XINT (XPROCESS (proc)->outfd) < 0) |
2950 | error ("Output file descriptor of %s is closed", procname); | |
2951 | ||
c7580538 | 2952 | coding = proc_encode_coding_system[XINT (XPROCESS (proc)->outfd)]; |
0fa1789e KH |
2953 | if (CODING_REQUIRE_CONVERSION (coding)) |
2954 | { | |
2955 | int require = encoding_buffer_size (coding, len); | |
2956 | int offset, dummy; | |
2957 | char *temp_buf = NULL; | |
2958 | ||
2959 | /* Remember the offset of data because a string or a buffer may | |
2960 | be relocated. Setting OFFSET to -1 means we don't have to | |
2961 | care relocation. */ | |
2962 | offset = (BUFFERP (object) | |
2963 | ? BUF_PTR_CHAR_POS (XBUFFER (object), (unsigned char *) buf) | |
2964 | : (STRINGP (object) | |
2965 | ? offset = buf - (char *) XSTRING (object)->data | |
2966 | : -1)); | |
2967 | ||
2968 | if (coding->carryover_size > 0) | |
2969 | { | |
2970 | temp_buf = (char *) xmalloc (len + coding->carryover_size); | |
2971 | ||
2972 | if (offset >= 0) | |
2973 | { | |
2974 | if (BUFFERP (object)) | |
2975 | buf = (char *) BUF_CHAR_ADDRESS (XBUFFER (object), offset); | |
2976 | else if (STRINGP (object)) | |
2977 | buf = offset + (char *) XSTRING (object)->data; | |
2978 | /* Now we don't have to care relocation. */ | |
2979 | offset = -1; | |
2980 | } | |
2981 | bcopy (coding->carryover, temp_buf, coding->carryover_size); | |
2982 | bcopy (buf, temp_buf + coding->carryover_size, len); | |
2983 | buf = temp_buf; | |
2984 | } | |
2985 | ||
2986 | if (XSTRING (XPROCESS (proc)->encoding_buf)->size < require) | |
2987 | { | |
2988 | XPROCESS (proc)->encoding_buf = make_uninit_string (require); | |
2989 | ||
2990 | if (offset >= 0) | |
2991 | { | |
2992 | if (BUFFERP (object)) | |
2993 | buf = (char *) BUF_CHAR_ADDRESS (XBUFFER (object), offset); | |
2994 | else if (STRINGP (object)) | |
2995 | buf = offset + (char *) XSTRING (object)->data; | |
2996 | } | |
2997 | } | |
2998 | object = XPROCESS (proc)->encoding_buf; | |
2999 | len = encode_coding (coding, buf, XSTRING (object)->data, | |
3000 | len, XSTRING (object)->size, &dummy); | |
3001 | buf = XSTRING (object)->data; | |
3002 | if (temp_buf) | |
3003 | xfree (temp_buf); | |
3004 | } | |
d0d6b7c5 JB |
3005 | |
3006 | #ifdef VMS | |
3007 | vs = get_vms_process_pointer (p->pid); | |
3008 | if (vs == 0) | |
3009 | error ("Could not find this process: %x", p->pid); | |
3010 | else if (write_to_vms_process (vs, buf, len)) | |
3011 | ; | |
3012 | #else | |
4556b700 RS |
3013 | |
3014 | if (pty_max_bytes == 0) | |
3015 | { | |
3016 | #if defined (HAVE_FPATHCONF) && defined (_PC_MAX_CANON) | |
3017 | pty_max_bytes = fpathconf (XFASTINT (XPROCESS (proc)->outfd), | |
3018 | _PC_MAX_CANON); | |
3019 | if (pty_max_bytes < 0) | |
3020 | pty_max_bytes = 250; | |
3021 | #else | |
3022 | pty_max_bytes = 250; | |
3023 | #endif | |
3024 | /* Deduct one, to leave space for the eof. */ | |
3025 | pty_max_bytes--; | |
3026 | } | |
3027 | ||
d0d6b7c5 JB |
3028 | if (!setjmp (send_process_frame)) |
3029 | while (len > 0) | |
3030 | { | |
3031 | int this = len; | |
4746118a | 3032 | SIGTYPE (*old_sigpipe)(); |
93b4f699 RS |
3033 | int flush_pty = 0; |
3034 | ||
4556b700 RS |
3035 | /* Decide how much data we can send in one batch. |
3036 | Long lines need to be split into multiple batches. */ | |
3037 | if (!NILP (XPROCESS (proc)->pty_flag)) | |
93b4f699 | 3038 | { |
4556b700 RS |
3039 | /* Starting this at zero is always correct when not the first iteration |
3040 | because the previous iteration ended by sending C-d. | |
3041 | It may not be correct for the first iteration | |
3042 | if a partial line was sent in a separate send_process call. | |
3043 | If that proves worth handling, we need to save linepos | |
3044 | in the process object. */ | |
3045 | int linepos = 0; | |
3046 | char *ptr = buf; | |
3047 | char *end = buf + len; | |
3048 | ||
3049 | /* Scan through this text for a line that is too long. */ | |
3050 | while (ptr != end && linepos < pty_max_bytes) | |
3051 | { | |
3052 | if (*ptr == '\n') | |
3053 | linepos = 0; | |
3054 | else | |
3055 | linepos++; | |
3056 | ptr++; | |
3057 | } | |
3058 | /* If we found one, break the line there | |
3059 | and put in a C-d to force the buffer through. */ | |
3060 | this = ptr - buf; | |
93b4f699 RS |
3061 | } |
3062 | ||
4556b700 RS |
3063 | /* Send this batch, using one or more write calls. */ |
3064 | while (this > 0) | |
d0d6b7c5 | 3065 | { |
4556b700 RS |
3066 | old_sigpipe = (SIGTYPE (*) ()) signal (SIGPIPE, send_process_trap); |
3067 | rv = write (XINT (XPROCESS (proc)->outfd), buf, this); | |
3068 | signal (SIGPIPE, old_sigpipe); | |
3069 | ||
3070 | if (rv < 0) | |
3071 | { | |
3072 | if (0 | |
d0d6b7c5 | 3073 | #ifdef EWOULDBLOCK |
4556b700 | 3074 | || errno == EWOULDBLOCK |
d0d6b7c5 JB |
3075 | #endif |
3076 | #ifdef EAGAIN | |
4556b700 | 3077 | || errno == EAGAIN |
d0d6b7c5 | 3078 | #endif |
4556b700 RS |
3079 | ) |
3080 | /* Buffer is full. Wait, accepting input; | |
3081 | that may allow the program | |
3082 | to finish doing output and read more. */ | |
3083 | { | |
3084 | Lisp_Object zero; | |
3085 | int offset; | |
3086 | ||
3087 | /* Running filters might relocate buffers or strings. | |
3088 | Arrange to relocate BUF. */ | |
3089 | if (BUFFERP (object)) | |
3090 | offset = BUF_PTR_CHAR_POS (XBUFFER (object), | |
3091 | (unsigned char *) buf); | |
3092 | else if (STRINGP (object)) | |
3093 | offset = buf - (char *) XSTRING (object)->data; | |
3094 | ||
22719df2 | 3095 | XSETFASTINT (zero, 0); |
f3e6605c RS |
3096 | #ifdef EMACS_HAS_USECS |
3097 | wait_reading_process_input (0, 20000, zero, 0); | |
3098 | #else | |
4556b700 | 3099 | wait_reading_process_input (1, 0, zero, 0); |
f3e6605c | 3100 | #endif |
4556b700 RS |
3101 | |
3102 | if (BUFFERP (object)) | |
3103 | buf = (char *) BUF_CHAR_ADDRESS (XBUFFER (object), offset); | |
3104 | else if (STRINGP (object)) | |
3105 | buf = offset + (char *) XSTRING (object)->data; | |
3106 | ||
3107 | rv = 0; | |
3108 | } | |
3109 | else | |
3110 | /* This is a real error. */ | |
3111 | report_file_error ("writing to process", Fcons (proc, Qnil)); | |
d0d6b7c5 | 3112 | } |
4556b700 RS |
3113 | buf += rv; |
3114 | len -= rv; | |
3115 | this -= rv; | |
d0d6b7c5 | 3116 | } |
f76475ad | 3117 | |
4556b700 RS |
3118 | /* If we sent just part of the string, put in an EOF |
3119 | to force it through, before we send the rest. */ | |
3120 | if (len > 0) | |
3121 | Fprocess_send_eof (proc); | |
d0d6b7c5 JB |
3122 | } |
3123 | #endif | |
3124 | else | |
3125 | { | |
3126 | XPROCESS (proc)->raw_status_low = Qnil; | |
3127 | XPROCESS (proc)->raw_status_high = Qnil; | |
3128 | XPROCESS (proc)->status = Fcons (Qexit, Fcons (make_number (256), Qnil)); | |
3129 | XSETINT (XPROCESS (proc)->tick, ++process_tick); | |
3130 | deactivate_process (proc); | |
3131 | #ifdef VMS | |
3132 | error ("Error writing to process %s; closed it", procname); | |
3133 | #else | |
3134 | error ("SIGPIPE raised on process %s; closed it", procname); | |
3135 | #endif | |
3136 | } | |
6044e593 RS |
3137 | |
3138 | UNGCPRO; | |
d0d6b7c5 JB |
3139 | } |
3140 | ||
3141 | DEFUN ("process-send-region", Fprocess_send_region, Sprocess_send_region, | |
3142 | 3, 3, 0, | |
3143 | "Send current contents of region as input to PROCESS.\n\ | |
ebb9e16f JB |
3144 | PROCESS may be a process, a buffer, the name of a process or buffer, or\n\ |
3145 | nil, indicating the current buffer's process.\n\ | |
d0d6b7c5 JB |
3146 | Called from program, takes three arguments, PROCESS, START and END.\n\ |
3147 | If the region is more than 500 characters long,\n\ | |
3148 | it is sent in several bunches. This may happen even for shorter regions.\n\ | |
3149 | Output from processes can arrive in between bunches.") | |
3150 | (process, start, end) | |
3151 | Lisp_Object process, start, end; | |
3152 | { | |
3153 | Lisp_Object proc; | |
3154 | int start1; | |
3155 | ||
3156 | proc = get_process (process); | |
3157 | validate_region (&start, &end); | |
3158 | ||
3159 | if (XINT (start) < GPT && XINT (end) > GPT) | |
3160 | move_gap (start); | |
3161 | ||
3162 | start1 = XINT (start); | |
0fa1789e | 3163 | send_process (proc, POS_ADDR (start1), XINT (end) - XINT (start), |
4556b700 | 3164 | Fcurrent_buffer ()); |
d0d6b7c5 JB |
3165 | |
3166 | return Qnil; | |
3167 | } | |
3168 | ||
3169 | DEFUN ("process-send-string", Fprocess_send_string, Sprocess_send_string, | |
3170 | 2, 2, 0, | |
3171 | "Send PROCESS the contents of STRING as input.\n\ | |
ebb9e16f JB |
3172 | PROCESS may be a process, a buffer, the name of a process or buffer, or\n\ |
3173 | nil, indicating the current buffer's process.\n\ | |
d0d6b7c5 JB |
3174 | If STRING is more than 500 characters long,\n\ |
3175 | it is sent in several bunches. This may happen even for shorter strings.\n\ | |
3176 | Output from processes can arrive in between bunches.") | |
3177 | (process, string) | |
3178 | Lisp_Object process, string; | |
3179 | { | |
3180 | Lisp_Object proc; | |
3181 | CHECK_STRING (string, 1); | |
3182 | proc = get_process (process); | |
4556b700 | 3183 | send_process (proc, XSTRING (string)->data, XSTRING (string)->size, string); |
d0d6b7c5 JB |
3184 | return Qnil; |
3185 | } | |
3186 | \f | |
3187 | /* send a signal number SIGNO to PROCESS. | |
3188 | CURRENT_GROUP means send to the process group that currently owns | |
3189 | the terminal being used to communicate with PROCESS. | |
3190 | This is used for various commands in shell mode. | |
3191 | If NOMSG is zero, insert signal-announcements into process's buffers | |
b0310da4 JB |
3192 | right away. |
3193 | ||
3194 | If we can, we try to signal PROCESS by sending control characters | |
e333e864 | 3195 | down the pty. This allows us to signal inferiors who have changed |
b0310da4 | 3196 | their uid, for which killpg would return an EPERM error. */ |
d0d6b7c5 | 3197 | |
f9738840 | 3198 | static void |
d0d6b7c5 JB |
3199 | process_send_signal (process, signo, current_group, nomsg) |
3200 | Lisp_Object process; | |
3201 | int signo; | |
3202 | Lisp_Object current_group; | |
3203 | int nomsg; | |
3204 | { | |
3205 | Lisp_Object proc; | |
3206 | register struct Lisp_Process *p; | |
3207 | int gid; | |
3208 | int no_pgrp = 0; | |
3209 | ||
3210 | proc = get_process (process); | |
3211 | p = XPROCESS (proc); | |
3212 | ||
3213 | if (!EQ (p->childp, Qt)) | |
3214 | error ("Process %s is not a subprocess", | |
3215 | XSTRING (p->name)->data); | |
a9f2c884 | 3216 | if (XINT (p->infd) < 0) |
d0d6b7c5 JB |
3217 | error ("Process %s is not active", |
3218 | XSTRING (p->name)->data); | |
3219 | ||
3220 | if (NILP (p->pty_flag)) | |
3221 | current_group = Qnil; | |
3222 | ||
d0d6b7c5 JB |
3223 | /* If we are using pgrps, get a pgrp number and make it negative. */ |
3224 | if (!NILP (current_group)) | |
3225 | { | |
b0310da4 | 3226 | #ifdef SIGNALS_VIA_CHARACTERS |
d0d6b7c5 JB |
3227 | /* If possible, send signals to the entire pgrp |
3228 | by sending an input character to it. */ | |
b0310da4 | 3229 | |
6be429b1 JB |
3230 | /* TERMIOS is the latest and bestest, and seems most likely to |
3231 | work. If the system has it, use it. */ | |
3232 | #ifdef HAVE_TERMIOS | |
3233 | struct termios t; | |
3234 | ||
3235 | switch (signo) | |
3236 | { | |
3237 | case SIGINT: | |
a9f2c884 | 3238 | tcgetattr (XINT (p->infd), &t); |
4556b700 | 3239 | send_process (proc, &t.c_cc[VINTR], 1, Qnil); |
a87b802f | 3240 | return; |
6be429b1 JB |
3241 | |
3242 | case SIGQUIT: | |
a9f2c884 | 3243 | tcgetattr (XINT (p->infd), &t); |
4556b700 | 3244 | send_process (proc, &t.c_cc[VQUIT], 1, Qnil); |
a87b802f | 3245 | return; |
6be429b1 JB |
3246 | |
3247 | case SIGTSTP: | |
a9f2c884 | 3248 | tcgetattr (XINT (p->infd), &t); |
d0adf46f | 3249 | #if defined (VSWTCH) && !defined (PREFER_VSUSP) |
4556b700 | 3250 | send_process (proc, &t.c_cc[VSWTCH], 1, Qnil); |
6be429b1 | 3251 | #else |
4556b700 | 3252 | send_process (proc, &t.c_cc[VSUSP], 1, Qnil); |
6be429b1 | 3253 | #endif |
a87b802f | 3254 | return; |
6be429b1 JB |
3255 | } |
3256 | ||
3257 | #else /* ! HAVE_TERMIOS */ | |
3258 | ||
b0310da4 JB |
3259 | /* On Berkeley descendants, the following IOCTL's retrieve the |
3260 | current control characters. */ | |
d0d6b7c5 | 3261 | #if defined (TIOCGLTC) && defined (TIOCGETC) |
b0310da4 | 3262 | |
d0d6b7c5 JB |
3263 | struct tchars c; |
3264 | struct ltchars lc; | |
3265 | ||
3266 | switch (signo) | |
3267 | { | |
3268 | case SIGINT: | |
a9f2c884 | 3269 | ioctl (XINT (p->infd), TIOCGETC, &c); |
4556b700 | 3270 | send_process (proc, &c.t_intrc, 1, Qnil); |
f9738840 | 3271 | return; |
d0d6b7c5 | 3272 | case SIGQUIT: |
a9f2c884 | 3273 | ioctl (XINT (p->infd), TIOCGETC, &c); |
4556b700 | 3274 | send_process (proc, &c.t_quitc, 1, Qnil); |
f9738840 | 3275 | return; |
0ad77c54 | 3276 | #ifdef SIGTSTP |
d0d6b7c5 | 3277 | case SIGTSTP: |
a9f2c884 | 3278 | ioctl (XINT (p->infd), TIOCGLTC, &lc); |
4556b700 | 3279 | send_process (proc, &lc.t_suspc, 1, Qnil); |
f9738840 | 3280 | return; |
b0310da4 | 3281 | #endif /* ! defined (SIGTSTP) */ |
d0d6b7c5 | 3282 | } |
b0310da4 JB |
3283 | |
3284 | #else /* ! defined (TIOCGLTC) && defined (TIOCGETC) */ | |
3285 | ||
3286 | /* On SYSV descendants, the TCGETA ioctl retrieves the current control | |
3287 | characters. */ | |
3288 | #ifdef TCGETA | |
d0d6b7c5 JB |
3289 | struct termio t; |
3290 | switch (signo) | |
3291 | { | |
3292 | case SIGINT: | |
a9f2c884 | 3293 | ioctl (XINT (p->infd), TCGETA, &t); |
4556b700 | 3294 | send_process (proc, &t.c_cc[VINTR], 1, Qnil); |
f9738840 | 3295 | return; |
d0d6b7c5 | 3296 | case SIGQUIT: |
a9f2c884 | 3297 | ioctl (XINT (p->infd), TCGETA, &t); |
4556b700 | 3298 | send_process (proc, &t.c_cc[VQUIT], 1, Qnil); |
f9738840 | 3299 | return; |
7d79e3b4 | 3300 | #ifdef SIGTSTP |
d0d6b7c5 | 3301 | case SIGTSTP: |
a9f2c884 | 3302 | ioctl (XINT (p->infd), TCGETA, &t); |
4556b700 | 3303 | send_process (proc, &t.c_cc[VSWTCH], 1, Qnil); |
f9738840 | 3304 | return; |
b0310da4 | 3305 | #endif /* ! defined (SIGTSTP) */ |
d0d6b7c5 | 3306 | } |
b0310da4 JB |
3307 | #else /* ! defined (TCGETA) */ |
3308 | Your configuration files are messed up. | |
3309 | /* If your system configuration files define SIGNALS_VIA_CHARACTERS, | |
3310 | you'd better be using one of the alternatives above! */ | |
3311 | #endif /* ! defined (TCGETA) */ | |
3312 | #endif /* ! defined (TIOCGLTC) && defined (TIOCGETC) */ | |
6be429b1 | 3313 | #endif /* ! defined HAVE_TERMIOS */ |
b0310da4 | 3314 | #endif /* ! defined (SIGNALS_VIA_CHARACTERS) */ |
d0d6b7c5 | 3315 | |
301c3fe4 | 3316 | #ifdef TIOCGPGRP |
d0d6b7c5 JB |
3317 | /* Get the pgrp using the tty itself, if we have that. |
3318 | Otherwise, use the pty to get the pgrp. | |
3319 | On pfa systems, saka@pfu.fujitsu.co.JP writes: | |
b0310da4 JB |
3320 | "TIOCGPGRP symbol defined in sys/ioctl.h at E50. |
3321 | But, TIOCGPGRP does not work on E50 ;-P works fine on E60" | |
d0d6b7c5 JB |
3322 | His patch indicates that if TIOCGPGRP returns an error, then |
3323 | we should just assume that p->pid is also the process group id. */ | |
3324 | { | |
3325 | int err; | |
3326 | ||
3327 | if (!NILP (p->subtty)) | |
3328 | err = ioctl (XFASTINT (p->subtty), TIOCGPGRP, &gid); | |
3329 | else | |
a9f2c884 | 3330 | err = ioctl (XINT (p->infd), TIOCGPGRP, &gid); |
d0d6b7c5 JB |
3331 | |
3332 | #ifdef pfa | |
3333 | if (err == -1) | |
3334 | gid = - XFASTINT (p->pid); | |
301c3fe4 | 3335 | #endif /* ! defined (pfa) */ |
d0d6b7c5 JB |
3336 | } |
3337 | if (gid == -1) | |
3338 | no_pgrp = 1; | |
3339 | else | |
3340 | gid = - gid; | |
b0310da4 | 3341 | #else /* ! defined (TIOCGPGRP ) */ |
301c3fe4 JB |
3342 | /* Can't select pgrps on this system, so we know that |
3343 | the child itself heads the pgrp. */ | |
3344 | gid = - XFASTINT (p->pid); | |
3345 | #endif /* ! defined (TIOCGPGRP ) */ | |
d0d6b7c5 JB |
3346 | } |
3347 | else | |
3348 | gid = - XFASTINT (p->pid); | |
d0d6b7c5 JB |
3349 | |
3350 | switch (signo) | |
3351 | { | |
3352 | #ifdef SIGCONT | |
3353 | case SIGCONT: | |
3354 | p->raw_status_low = Qnil; | |
3355 | p->raw_status_high = Qnil; | |
3356 | p->status = Qrun; | |
3357 | XSETINT (p->tick, ++process_tick); | |
3358 | if (!nomsg) | |
3359 | status_notify (); | |
3360 | break; | |
301c3fe4 | 3361 | #endif /* ! defined (SIGCONT) */ |
d0d6b7c5 JB |
3362 | case SIGINT: |
3363 | #ifdef VMS | |
4556b700 | 3364 | send_process (proc, "\003", 1, Qnil); /* ^C */ |
d0d6b7c5 JB |
3365 | goto whoosh; |
3366 | #endif | |
3367 | case SIGQUIT: | |
3368 | #ifdef VMS | |
4556b700 | 3369 | send_process (proc, "\031", 1, Qnil); /* ^Y */ |
d0d6b7c5 JB |
3370 | goto whoosh; |
3371 | #endif | |
3372 | case SIGKILL: | |
3373 | #ifdef VMS | |
3374 | sys$forcex (&(XFASTINT (p->pid)), 0, 1); | |
3375 | whoosh: | |
3376 | #endif | |
a9f2c884 | 3377 | flush_pending_output (XINT (p->infd)); |
d0d6b7c5 JB |
3378 | break; |
3379 | } | |
3380 | ||
3381 | /* If we don't have process groups, send the signal to the immediate | |
3382 | subprocess. That isn't really right, but it's better than any | |
3383 | obvious alternative. */ | |
3384 | if (no_pgrp) | |
3385 | { | |
3386 | kill (XFASTINT (p->pid), signo); | |
3387 | return; | |
3388 | } | |
3389 | ||
3390 | /* gid may be a pid, or minus a pgrp's number */ | |
3391 | #ifdef TIOCSIGSEND | |
3392 | if (!NILP (current_group)) | |
a9f2c884 | 3393 | ioctl (XINT (p->infd), TIOCSIGSEND, signo); |
d0d6b7c5 JB |
3394 | else |
3395 | { | |
3396 | gid = - XFASTINT (p->pid); | |
3397 | kill (gid, signo); | |
3398 | } | |
301c3fe4 | 3399 | #else /* ! defined (TIOCSIGSEND) */ |
d0d6b7c5 | 3400 | EMACS_KILLPG (-gid, signo); |
301c3fe4 | 3401 | #endif /* ! defined (TIOCSIGSEND) */ |
d0d6b7c5 JB |
3402 | } |
3403 | ||
3404 | DEFUN ("interrupt-process", Finterrupt_process, Sinterrupt_process, 0, 2, 0, | |
3405 | "Interrupt process PROCESS. May be process or name of one.\n\ | |
ebb9e16f | 3406 | PROCESS may be a process, a buffer, or the name of a process or buffer.\n\ |
e333e864 | 3407 | nil or no arg means current buffer's process.\n\ |
d0d6b7c5 JB |
3408 | Second arg CURRENT-GROUP non-nil means send signal to\n\ |
3409 | the current process-group of the process's controlling terminal\n\ | |
3410 | rather than to the process's own process group.\n\ | |
3411 | If the process is a shell, this means interrupt current subjob\n\ | |
3412 | rather than the shell.") | |
3413 | (process, current_group) | |
3414 | Lisp_Object process, current_group; | |
3415 | { | |
3416 | process_send_signal (process, SIGINT, current_group, 0); | |
3417 | return process; | |
3418 | } | |
3419 | ||
3420 | DEFUN ("kill-process", Fkill_process, Skill_process, 0, 2, 0, | |
3421 | "Kill process PROCESS. May be process or name of one.\n\ | |
3422 | See function `interrupt-process' for more details on usage.") | |
3423 | (process, current_group) | |
3424 | Lisp_Object process, current_group; | |
3425 | { | |
3426 | process_send_signal (process, SIGKILL, current_group, 0); | |
3427 | return process; | |
3428 | } | |
3429 | ||
3430 | DEFUN ("quit-process", Fquit_process, Squit_process, 0, 2, 0, | |
3431 | "Send QUIT signal to process PROCESS. May be process or name of one.\n\ | |
3432 | See function `interrupt-process' for more details on usage.") | |
3433 | (process, current_group) | |
3434 | Lisp_Object process, current_group; | |
3435 | { | |
3436 | process_send_signal (process, SIGQUIT, current_group, 0); | |
3437 | return process; | |
3438 | } | |
3439 | ||
3440 | DEFUN ("stop-process", Fstop_process, Sstop_process, 0, 2, 0, | |
3441 | "Stop process PROCESS. May be process or name of one.\n\ | |
3442 | See function `interrupt-process' for more details on usage.") | |
3443 | (process, current_group) | |
3444 | Lisp_Object process, current_group; | |
3445 | { | |
3446 | #ifndef SIGTSTP | |
3447 | error ("no SIGTSTP support"); | |
3448 | #else | |
3449 | process_send_signal (process, SIGTSTP, current_group, 0); | |
3450 | #endif | |
3451 | return process; | |
3452 | } | |
3453 | ||
3454 | DEFUN ("continue-process", Fcontinue_process, Scontinue_process, 0, 2, 0, | |
3455 | "Continue process PROCESS. May be process or name of one.\n\ | |
3456 | See function `interrupt-process' for more details on usage.") | |
3457 | (process, current_group) | |
3458 | Lisp_Object process, current_group; | |
3459 | { | |
3460 | #ifdef SIGCONT | |
3461 | process_send_signal (process, SIGCONT, current_group, 0); | |
3462 | #else | |
3463 | error ("no SIGCONT support"); | |
3464 | #endif | |
3465 | return process; | |
3466 | } | |
3467 | ||
3468 | DEFUN ("signal-process", Fsignal_process, Ssignal_process, | |
3469 | 2, 2, "nProcess number: \nnSignal code: ", | |
4766242d RS |
3470 | "Send the process with process id PID the signal with code SIGCODE.\n\ |
3471 | PID must be an integer. The process need not be a child of this Emacs.\n\ | |
3472 | SIGCODE may be an integer, or a symbol whose name is a signal name.") | |
3473 | (pid, sigcode) | |
3474 | Lisp_Object pid, sigcode; | |
d0d6b7c5 JB |
3475 | { |
3476 | CHECK_NUMBER (pid, 0); | |
4766242d RS |
3477 | |
3478 | #define handle_signal(NAME, VALUE) \ | |
3479 | else if (!strcmp (name, NAME)) \ | |
3480 | XSETINT (sigcode, VALUE) | |
3481 | ||
3482 | if (INTEGERP (sigcode)) | |
3483 | ; | |
3484 | else | |
3485 | { | |
3486 | unsigned char *name; | |
3487 | ||
3488 | CHECK_SYMBOL (sigcode, 1); | |
3489 | name = XSYMBOL (sigcode)->name->data; | |
3490 | ||
3491 | if (0) | |
3492 | ; | |
3493 | #ifdef SIGHUP | |
3494 | handle_signal ("SIGHUP", SIGHUP); | |
3495 | #endif | |
3496 | #ifdef SIGINT | |
3497 | handle_signal ("SIGINT", SIGINT); | |
3498 | #endif | |
3499 | #ifdef SIGQUIT | |
3500 | handle_signal ("SIGQUIT", SIGQUIT); | |
3501 | #endif | |
3502 | #ifdef SIGILL | |
3503 | handle_signal ("SIGILL", SIGILL); | |
3504 | #endif | |
3505 | #ifdef SIGABRT | |
3506 | handle_signal ("SIGABRT", SIGABRT); | |
3507 | #endif | |
3508 | #ifdef SIGEMT | |
3509 | handle_signal ("SIGEMT", SIGEMT); | |
3510 | #endif | |
3511 | #ifdef SIGKILL | |
3512 | handle_signal ("SIGKILL", SIGKILL); | |
3513 | #endif | |
3514 | #ifdef SIGFPE | |
3515 | handle_signal ("SIGFPE", SIGFPE); | |
3516 | #endif | |
3517 | #ifdef SIGBUS | |
3518 | handle_signal ("SIGBUS", SIGBUS); | |
3519 | #endif | |
3520 | #ifdef SIGSEGV | |
3521 | handle_signal ("SIGSEGV", SIGSEGV); | |
3522 | #endif | |
3523 | #ifdef SIGSYS | |
3524 | handle_signal ("SIGSYS", SIGSYS); | |
3525 | #endif | |
3526 | #ifdef SIGPIPE | |
3527 | handle_signal ("SIGPIPE", SIGPIPE); | |
3528 | #endif | |
3529 | #ifdef SIGALRM | |
3530 | handle_signal ("SIGALRM", SIGALRM); | |
3531 | #endif | |
3532 | #ifdef SIGTERM | |
3533 | handle_signal ("SIGTERM", SIGTERM); | |
3534 | #endif | |
3535 | #ifdef SIGURG | |
3536 | handle_signal ("SIGURG", SIGURG); | |
3537 | #endif | |
3538 | #ifdef SIGSTOP | |
3539 | handle_signal ("SIGSTOP", SIGSTOP); | |
3540 | #endif | |
3541 | #ifdef SIGTSTP | |
3542 | handle_signal ("SIGTSTP", SIGTSTP); | |
3543 | #endif | |
3544 | #ifdef SIGCONT | |
3545 | handle_signal ("SIGCONT", SIGCONT); | |
3546 | #endif | |
3547 | #ifdef SIGCHLD | |
3548 | handle_signal ("SIGCHLD", SIGCHLD); | |
3549 | #endif | |
3550 | #ifdef SIGTTIN | |
3551 | handle_signal ("SIGTTIN", SIGTTIN); | |
3552 | #endif | |
3553 | #ifdef SIGTTOU | |
3554 | handle_signal ("SIGTTOU", SIGTTOU); | |
3555 | #endif | |
3556 | #ifdef SIGIO | |
3557 | handle_signal ("SIGIO", SIGIO); | |
3558 | #endif | |
3559 | #ifdef SIGXCPU | |
3560 | handle_signal ("SIGXCPU", SIGXCPU); | |
3561 | #endif | |
3562 | #ifdef SIGXFSZ | |
3563 | handle_signal ("SIGXFSZ", SIGXFSZ); | |
3564 | #endif | |
3565 | #ifdef SIGVTALRM | |
3566 | handle_signal ("SIGVTALRM", SIGVTALRM); | |
3567 | #endif | |
3568 | #ifdef SIGPROF | |
3569 | handle_signal ("SIGPROF", SIGPROF); | |
3570 | #endif | |
3571 | #ifdef SIGWINCH | |
3572 | handle_signal ("SIGWINCH", SIGWINCH); | |
3573 | #endif | |
3574 | #ifdef SIGINFO | |
3575 | handle_signal ("SIGINFO", SIGINFO); | |
3576 | #endif | |
3577 | #ifdef SIGUSR1 | |
3578 | handle_signal ("SIGUSR1", SIGUSR1); | |
3579 | #endif | |
3580 | #ifdef SIGUSR2 | |
3581 | handle_signal ("SIGUSR2", SIGUSR2); | |
3582 | #endif | |
3583 | else | |
9fa195a2 | 3584 | error ("Undefined signal name %s", name); |
4766242d RS |
3585 | } |
3586 | ||
3587 | #undef handle_signal | |
3588 | ||
4766242d | 3589 | return make_number (kill (XINT (pid), XINT (sigcode))); |
d0d6b7c5 JB |
3590 | } |
3591 | ||
3592 | DEFUN ("process-send-eof", Fprocess_send_eof, Sprocess_send_eof, 0, 1, 0, | |
3593 | "Make PROCESS see end-of-file in its input.\n\ | |
3594 | Eof comes after any text already sent to it.\n\ | |
ebb9e16f | 3595 | PROCESS may be a process, a buffer, the name of a process or buffer, or\n\ |
d33a00f2 RS |
3596 | nil, indicating the current buffer's process.\n\ |
3597 | If PROCESS is a network connection, or is a process communicating\n\ | |
3598 | through a pipe (as opposed to a pty), then you cannot send any more\n\ | |
3599 | text to PROCESS after you call this function.") | |
d0d6b7c5 JB |
3600 | (process) |
3601 | Lisp_Object process; | |
3602 | { | |
3603 | Lisp_Object proc; | |
3604 | ||
3605 | proc = get_process (process); | |
577d03d5 RS |
3606 | |
3607 | /* Make sure the process is really alive. */ | |
3608 | if (! NILP (XPROCESS (proc)->raw_status_low)) | |
3609 | update_status (XPROCESS (proc)); | |
3610 | if (! EQ (XPROCESS (proc)->status, Qrun)) | |
dcf970e6 | 3611 | error ("Process %s not running", XSTRING (XPROCESS (proc)->name)->data); |
577d03d5 | 3612 | |
d0d6b7c5 | 3613 | #ifdef VMS |
4556b700 | 3614 | send_process (proc, "\032", 1, Qnil); /* ^z */ |
d0d6b7c5 JB |
3615 | #else |
3616 | if (!NILP (XPROCESS (proc)->pty_flag)) | |
4556b700 | 3617 | send_process (proc, "\004", 1, Qnil); |
d0d6b7c5 JB |
3618 | else |
3619 | { | |
a9f2c884 | 3620 | close (XINT (XPROCESS (proc)->outfd)); |
1d056e64 | 3621 | XSETINT (XPROCESS (proc)->outfd, open (NULL_DEVICE, O_WRONLY)); |
d0d6b7c5 JB |
3622 | } |
3623 | #endif /* VMS */ | |
d0d6b7c5 JB |
3624 | return process; |
3625 | } | |
3626 | ||
3627 | /* Kill all processes associated with `buffer'. | |
3628 | If `buffer' is nil, kill all processes */ | |
3629 | ||
3630 | kill_buffer_processes (buffer) | |
3631 | Lisp_Object buffer; | |
3632 | { | |
3633 | Lisp_Object tail, proc; | |
3634 | ||
b5b502d6 | 3635 | for (tail = Vprocess_alist; GC_CONSP (tail); tail = XCONS (tail)->cdr) |
d0d6b7c5 JB |
3636 | { |
3637 | proc = XCONS (XCONS (tail)->car)->cdr; | |
b5b502d6 | 3638 | if (GC_PROCESSP (proc) |
d0d6b7c5 JB |
3639 | && (NILP (buffer) || EQ (XPROCESS (proc)->buffer, buffer))) |
3640 | { | |
3641 | if (NETCONN_P (proc)) | |
e1ab4959 | 3642 | Fdelete_process (proc); |
a9f2c884 | 3643 | else if (XINT (XPROCESS (proc)->infd) >= 0) |
d0d6b7c5 JB |
3644 | process_send_signal (proc, SIGHUP, Qnil, 1); |
3645 | } | |
3646 | } | |
3647 | } | |
3648 | \f | |
3649 | /* On receipt of a signal that a child status has changed, | |
3650 | loop asking about children with changed statuses until | |
3651 | the system says there are no more. | |
3652 | All we do is change the status; | |
3653 | we do not run sentinels or print notifications. | |
3654 | That is saved for the next time keyboard input is done, | |
3655 | in order to avoid timing errors. */ | |
3656 | ||
3657 | /** WARNING: this can be called during garbage collection. | |
3658 | Therefore, it must not be fooled by the presence of mark bits in | |
3659 | Lisp objects. */ | |
3660 | ||
3661 | /** USG WARNING: Although it is not obvious from the documentation | |
3662 | in signal(2), on a USG system the SIGCLD handler MUST NOT call | |
3663 | signal() before executing at least one wait(), otherwise the handler | |
3664 | will be called again, resulting in an infinite loop. The relevant | |
3665 | portion of the documentation reads "SIGCLD signals will be queued | |
3666 | and the signal-catching function will be continually reentered until | |
3667 | the queue is empty". Invoking signal() causes the kernel to reexamine | |
3668 | the SIGCLD queue. Fred Fish, UniSoft Systems Inc. */ | |
3669 | ||
3670 | SIGTYPE | |
3671 | sigchld_handler (signo) | |
3672 | int signo; | |
3673 | { | |
3674 | int old_errno = errno; | |
3675 | Lisp_Object proc; | |
3676 | register struct Lisp_Process *p; | |
6be429b1 | 3677 | extern EMACS_TIME *input_available_clear_time; |
d0d6b7c5 JB |
3678 | |
3679 | #ifdef BSD4_1 | |
3680 | extern int sigheld; | |
3681 | sigheld |= sigbit (SIGCHLD); | |
3682 | #endif | |
3683 | ||
3684 | while (1) | |
3685 | { | |
3686 | register int pid; | |
3687 | WAITTYPE w; | |
3688 | Lisp_Object tail; | |
3689 | ||
3690 | #ifdef WNOHANG | |
3691 | #ifndef WUNTRACED | |
3692 | #define WUNTRACED 0 | |
3693 | #endif /* no WUNTRACED */ | |
3694 | /* Keep trying to get a status until we get a definitive result. */ | |
3695 | do | |
3696 | { | |
3697 | errno = 0; | |
3698 | pid = wait3 (&w, WNOHANG | WUNTRACED, 0); | |
3699 | } | |
3700 | while (pid <= 0 && errno == EINTR); | |
3701 | ||
3702 | if (pid <= 0) | |
3703 | { | |
3704 | /* A real failure. We have done all our job, so return. */ | |
3705 | ||
3706 | /* USG systems forget handlers when they are used; | |
3707 | must reestablish each time */ | |
3c0ee47b | 3708 | #if defined (USG) && !defined (POSIX_SIGNALS) |
d0d6b7c5 JB |
3709 | signal (signo, sigchld_handler); /* WARNING - must come after wait3() */ |
3710 | #endif | |
3711 | #ifdef BSD4_1 | |
3712 | sigheld &= ~sigbit (SIGCHLD); | |
3713 | sigrelse (SIGCHLD); | |
3714 | #endif | |
3715 | errno = old_errno; | |
3716 | return; | |
3717 | } | |
3718 | #else | |
3719 | pid = wait (&w); | |
3720 | #endif /* no WNOHANG */ | |
3721 | ||
3722 | /* Find the process that signaled us, and record its status. */ | |
3723 | ||
3724 | p = 0; | |
7968cc2d | 3725 | for (tail = Vprocess_alist; CONSP (tail); tail = XCONS (tail)->cdr) |
d0d6b7c5 JB |
3726 | { |
3727 | proc = XCONS (XCONS (tail)->car)->cdr; | |
3728 | p = XPROCESS (proc); | |
3729 | if (EQ (p->childp, Qt) && XFASTINT (p->pid) == pid) | |
3730 | break; | |
3731 | p = 0; | |
3732 | } | |
3733 | ||
3734 | /* Look for an asynchronous process whose pid hasn't been filled | |
3735 | in yet. */ | |
3736 | if (p == 0) | |
7968cc2d | 3737 | for (tail = Vprocess_alist; CONSP (tail); tail = XCONS (tail)->cdr) |
d0d6b7c5 JB |
3738 | { |
3739 | proc = XCONS (XCONS (tail)->car)->cdr; | |
3740 | p = XPROCESS (proc); | |
bcd69aea | 3741 | if (INTEGERP (p->pid) && XINT (p->pid) == -1) |
d0d6b7c5 JB |
3742 | break; |
3743 | p = 0; | |
3744 | } | |
3745 | ||
3746 | /* Change the status of the process that was found. */ | |
3747 | if (p != 0) | |
3748 | { | |
3749 | union { int i; WAITTYPE wt; } u; | |
e98d950b | 3750 | int clear_desc_flag = 0; |
d0d6b7c5 JB |
3751 | |
3752 | XSETINT (p->tick, ++process_tick); | |
3753 | u.wt = w; | |
5fc0154c RS |
3754 | XSETINT (p->raw_status_low, u.i & 0xffff); |
3755 | XSETINT (p->raw_status_high, u.i >> 16); | |
d0d6b7c5 JB |
3756 | |
3757 | /* If process has terminated, stop waiting for its output. */ | |
e98d950b RS |
3758 | if ((WIFSIGNALED (w) || WIFEXITED (w)) |
3759 | && XINT (p->infd) >= 0) | |
3760 | clear_desc_flag = 1; | |
3761 | ||
3762 | /* We use clear_desc_flag to avoid a compiler bug in Microsoft C. */ | |
3763 | if (clear_desc_flag) | |
3764 | { | |
3765 | FD_CLR (XINT (p->infd), &input_wait_mask); | |
3766 | FD_CLR (XINT (p->infd), &non_keyboard_wait_mask); | |
3767 | } | |
6be429b1 JB |
3768 | |
3769 | /* Tell wait_reading_process_input that it needs to wake up and | |
3770 | look around. */ | |
3771 | if (input_available_clear_time) | |
3772 | EMACS_SET_SECS_USECS (*input_available_clear_time, 0, 0); | |
d0d6b7c5 JB |
3773 | } |
3774 | ||
3775 | /* There was no asynchronous process found for that id. Check | |
3776 | if we have a synchronous process. */ | |
3777 | else | |
3778 | { | |
3779 | synch_process_alive = 0; | |
3780 | ||
3781 | /* Report the status of the synchronous process. */ | |
3782 | if (WIFEXITED (w)) | |
3783 | synch_process_retcode = WRETCODE (w); | |
3784 | else if (WIFSIGNALED (w)) | |
b97ad9ea RS |
3785 | { |
3786 | int code = WTERMSIG (w); | |
3787 | char *signame = 0; | |
3788 | ||
3789 | if (code < NSIG) | |
3790 | { | |
b0310da4 | 3791 | #ifndef VMS |
ed0cae05 RS |
3792 | /* Suppress warning if the table has const char *. */ |
3793 | signame = (char *) sys_siglist[code]; | |
b0310da4 | 3794 | #else |
b97ad9ea | 3795 | signame = sys_errlist[code]; |
b0310da4 | 3796 | #endif |
b97ad9ea RS |
3797 | } |
3798 | if (signame == 0) | |
3799 | signame = "unknown"; | |
3800 | ||
3801 | synch_process_death = signame; | |
3802 | } | |
6be429b1 JB |
3803 | |
3804 | /* Tell wait_reading_process_input that it needs to wake up and | |
3805 | look around. */ | |
3806 | if (input_available_clear_time) | |
3807 | EMACS_SET_SECS_USECS (*input_available_clear_time, 0, 0); | |
d0d6b7c5 JB |
3808 | } |
3809 | ||
3810 | /* On some systems, we must return right away. | |
3811 | If any more processes want to signal us, we will | |
3812 | get another signal. | |
3813 | Otherwise (on systems that have WNOHANG), loop around | |
3814 | to use up all the processes that have something to tell us. */ | |
e98d950b | 3815 | #if defined (USG) && ! (defined (HPUX) && defined (WNOHANG)) || defined (WINDOWSNT) |
3c0ee47b | 3816 | #if defined (USG) && ! defined (POSIX_SIGNALS) |
d0d6b7c5 JB |
3817 | signal (signo, sigchld_handler); |
3818 | #endif | |
3819 | errno = old_errno; | |
3820 | return; | |
3821 | #endif /* USG, but not HPUX with WNOHANG */ | |
3822 | } | |
3823 | } | |
3824 | \f | |
3825 | ||
3826 | static Lisp_Object | |
3827 | exec_sentinel_unwind (data) | |
3828 | Lisp_Object data; | |
3829 | { | |
3830 | XPROCESS (XCONS (data)->car)->sentinel = XCONS (data)->cdr; | |
3831 | return Qnil; | |
3832 | } | |
3833 | ||
3b9a3dfa RS |
3834 | static Lisp_Object |
3835 | exec_sentinel_error_handler (error) | |
3836 | Lisp_Object error; | |
3837 | { | |
3838 | cmd_error_internal (error, "error in process sentinel: "); | |
3839 | Vinhibit_quit = Qt; | |
3840 | update_echo_area (); | |
833ba342 | 3841 | Fsleep_for (make_number (2), Qnil); |
3b9a3dfa RS |
3842 | } |
3843 | ||
d0d6b7c5 JB |
3844 | static void |
3845 | exec_sentinel (proc, reason) | |
3846 | Lisp_Object proc, reason; | |
3847 | { | |
dfc21838 | 3848 | Lisp_Object sentinel, obuffer, odeactivate, okeymap; |
d0d6b7c5 JB |
3849 | register struct Lisp_Process *p = XPROCESS (proc); |
3850 | int count = specpdl_ptr - specpdl; | |
4da2f5be | 3851 | int outer_running_asynch_code = running_asynch_code; |
d0d6b7c5 | 3852 | |
dfc21838 RS |
3853 | /* No need to gcpro these, because all we do with them later |
3854 | is test them for EQness, and none of them should be a string. */ | |
8fb3cf64 | 3855 | odeactivate = Vdeactivate_mark; |
dfc21838 RS |
3856 | XSETBUFFER (obuffer, current_buffer); |
3857 | okeymap = current_buffer->keymap; | |
3858 | ||
d0d6b7c5 JB |
3859 | sentinel = p->sentinel; |
3860 | if (NILP (sentinel)) | |
3861 | return; | |
3862 | ||
3863 | /* Zilch the sentinel while it's running, to avoid recursive invocations; | |
3864 | assure that it gets restored no matter how the sentinel exits. */ | |
3865 | p->sentinel = Qnil; | |
3866 | record_unwind_protect (exec_sentinel_unwind, Fcons (proc, sentinel)); | |
3867 | /* Inhibit quit so that random quits don't screw up a running filter. */ | |
3868 | specbind (Qinhibit_quit, Qt); | |
6545aada | 3869 | specbind (Qlast_nonmenu_event, Qt); |
3b9a3dfa | 3870 | |
4da2f5be RS |
3871 | /* In case we get recursively called, |
3872 | and we already saved the match data nonrecursively, | |
3873 | save the same match data in safely recursive fashion. */ | |
3874 | if (outer_running_asynch_code) | |
3875 | { | |
3876 | Lisp_Object tem; | |
dd130227 | 3877 | tem = Fmatch_data (Qnil, Qnil); |
4da2f5be | 3878 | restore_match_data (); |
dd130227 | 3879 | record_unwind_protect (Fstore_match_data, Fmatch_data (Qnil, Qnil)); |
4da2f5be RS |
3880 | Fstore_match_data (tem); |
3881 | } | |
3882 | ||
3883 | /* For speed, if a search happens within this code, | |
3884 | save the match data in a special nonrecursive fashion. */ | |
7074fde6 | 3885 | running_asynch_code = 1; |
4da2f5be | 3886 | |
3b9a3dfa RS |
3887 | internal_condition_case_1 (read_process_output_call, |
3888 | Fcons (sentinel, | |
3889 | Fcons (proc, Fcons (reason, Qnil))), | |
3890 | !NILP (Vdebug_on_error) ? Qnil : Qerror, | |
3891 | exec_sentinel_error_handler); | |
4da2f5be RS |
3892 | |
3893 | /* If we saved the match data nonrecursively, restore it now. */ | |
7074fde6 | 3894 | restore_match_data (); |
4da2f5be | 3895 | running_asynch_code = outer_running_asynch_code; |
8fb3cf64 KH |
3896 | |
3897 | Vdeactivate_mark = odeactivate; | |
7973cfa8 | 3898 | #if 0 |
dfc21838 RS |
3899 | if (! EQ (Fcurrent_buffer (), obuffer) |
3900 | || ! EQ (current_buffer->keymap, okeymap)) | |
7973cfa8 | 3901 | #endif |
927e08be RS |
3902 | /* But do it only if the caller is actually going to read events. |
3903 | Otherwise there's no need to make him wake up, and it could | |
3904 | cause trouble (for example it would make Fsit_for return). */ | |
3905 | if (waiting_for_user_input_p == -1) | |
3906 | record_asynch_buffer_change (); | |
8fb3cf64 | 3907 | |
2ea6d561 | 3908 | unbind_to (count, Qnil); |
d0d6b7c5 JB |
3909 | } |
3910 | ||
3911 | /* Report all recent events of a change in process status | |
3912 | (either run the sentinel or output a message). | |
3913 | This is done while Emacs is waiting for keyboard input. */ | |
3914 | ||
3915 | status_notify () | |
3916 | { | |
3917 | register Lisp_Object proc, buffer; | |
2e4149a8 | 3918 | Lisp_Object tail, msg; |
d0d6b7c5 JB |
3919 | struct gcpro gcpro1, gcpro2; |
3920 | ||
2e4149a8 KH |
3921 | tail = Qnil; |
3922 | msg = Qnil; | |
d0d6b7c5 JB |
3923 | /* We need to gcpro tail; if read_process_output calls a filter |
3924 | which deletes a process and removes the cons to which tail points | |
3925 | from Vprocess_alist, and then causes a GC, tail is an unprotected | |
3926 | reference. */ | |
3927 | GCPRO2 (tail, msg); | |
3928 | ||
30623085 RS |
3929 | /* Set this now, so that if new processes are created by sentinels |
3930 | that we run, we get called again to handle their status changes. */ | |
3931 | update_tick = process_tick; | |
3932 | ||
3933 | for (tail = Vprocess_alist; !NILP (tail); tail = Fcdr (tail)) | |
d0d6b7c5 | 3934 | { |
30623085 RS |
3935 | Lisp_Object symbol; |
3936 | register struct Lisp_Process *p; | |
3937 | ||
3938 | proc = Fcdr (Fcar (tail)); | |
3939 | p = XPROCESS (proc); | |
3940 | ||
3941 | if (XINT (p->tick) != XINT (p->update_tick)) | |
d0d6b7c5 | 3942 | { |
30623085 | 3943 | XSETINT (p->update_tick, XINT (p->tick)); |
d0d6b7c5 | 3944 | |
30623085 | 3945 | /* If process is still active, read any output that remains. */ |
4da2f5be RS |
3946 | while (! EQ (p->filter, Qt) |
3947 | && XINT (p->infd) >= 0 | |
3948 | && read_process_output (proc, XINT (p->infd)) > 0); | |
d0d6b7c5 | 3949 | |
30623085 | 3950 | buffer = p->buffer; |
d0d6b7c5 | 3951 | |
30623085 RS |
3952 | /* Get the text to use for the message. */ |
3953 | if (!NILP (p->raw_status_low)) | |
3954 | update_status (p); | |
3955 | msg = status_message (p->status); | |
d0d6b7c5 | 3956 | |
30623085 RS |
3957 | /* If process is terminated, deactivate it or delete it. */ |
3958 | symbol = p->status; | |
3959 | if (CONSP (p->status)) | |
3960 | symbol = XCONS (p->status)->car; | |
d0d6b7c5 | 3961 | |
30623085 RS |
3962 | if (EQ (symbol, Qsignal) || EQ (symbol, Qexit) |
3963 | || EQ (symbol, Qclosed)) | |
3964 | { | |
3965 | if (delete_exited_processes) | |
3966 | remove_process (proc); | |
3967 | else | |
3968 | deactivate_process (proc); | |
3969 | } | |
d0d6b7c5 | 3970 | |
0ad61fe7 RS |
3971 | /* The actions above may have further incremented p->tick. |
3972 | So set p->update_tick again | |
3973 | so that an error in the sentinel will not cause | |
3974 | this code to be run again. */ | |
3975 | XSETINT (p->update_tick, XINT (p->tick)); | |
30623085 RS |
3976 | /* Now output the message suitably. */ |
3977 | if (!NILP (p->sentinel)) | |
3978 | exec_sentinel (proc, msg); | |
3979 | /* Don't bother with a message in the buffer | |
3980 | when a process becomes runnable. */ | |
3981 | else if (!EQ (symbol, Qrun) && !NILP (buffer)) | |
3982 | { | |
3983 | Lisp_Object ro, tem; | |
3984 | struct buffer *old = current_buffer; | |
3985 | int opoint; | |
12ca5cdf | 3986 | int before; |
2e4149a8 | 3987 | |
30623085 | 3988 | ro = XBUFFER (buffer)->read_only; |
d0d6b7c5 | 3989 | |
30623085 RS |
3990 | /* Avoid error if buffer is deleted |
3991 | (probably that's why the process is dead, too) */ | |
3992 | if (NILP (XBUFFER (buffer)->name)) | |
3993 | continue; | |
3994 | Fset_buffer (buffer); | |
12ca5cdf | 3995 | |
6ec8bbd2 | 3996 | opoint = PT; |
30623085 RS |
3997 | /* Insert new output into buffer |
3998 | at the current end-of-output marker, | |
3999 | thus preserving logical ordering of input and output. */ | |
4000 | if (XMARKER (p->mark)->buffer) | |
4001 | SET_PT (marker_position (p->mark)); | |
4002 | else | |
4003 | SET_PT (ZV); | |
12ca5cdf RS |
4004 | |
4005 | before = PT; | |
30623085 RS |
4006 | |
4007 | tem = current_buffer->read_only; | |
4008 | current_buffer->read_only = Qnil; | |
4009 | insert_string ("\nProcess "); | |
4010 | Finsert (1, &p->name); | |
4011 | insert_string (" "); | |
4012 | Finsert (1, &msg); | |
4013 | current_buffer->read_only = tem; | |
6ec8bbd2 | 4014 | Fset_marker (p->mark, make_number (PT), p->buffer); |
30623085 | 4015 | |
12ca5cdf RS |
4016 | if (opoint >= before) |
4017 | SET_PT (opoint + (PT - before)); | |
4018 | else | |
4019 | SET_PT (opoint); | |
4020 | ||
30623085 | 4021 | set_buffer_internal (old); |
d0d6b7c5 | 4022 | } |
30623085 RS |
4023 | } |
4024 | } /* end for */ | |
d0d6b7c5 JB |
4025 | |
4026 | update_mode_lines++; /* in case buffers use %s in mode-line-format */ | |
4027 | redisplay_preserve_echo_area (); | |
4028 | ||
d0d6b7c5 JB |
4029 | UNGCPRO; |
4030 | } | |
0fa1789e KH |
4031 | |
4032 | \f | |
4033 | DEFUN ("set-process-coding-system", Fset_process_coding_system, | |
4034 | Sset_process_coding_system, 1, 3, 0, | |
4035 | "Set coding-systems of PROCESS to DECODING (input from the process) and\n\ | |
4036 | ENCODING (output to the process).") | |
4037 | (proc, decoding, encoding) | |
4038 | register Lisp_Object proc, decoding, encoding; | |
4039 | { | |
4040 | register struct Lisp_Process *p; | |
4041 | ||
4042 | CHECK_PROCESS (proc, 0); | |
4043 | p = XPROCESS (proc); | |
4044 | if (XINT (p->infd) < 0) | |
4045 | error ("Input file descriptor of %s closed", XSTRING (p->name)->data); | |
4046 | if (XINT (p->outfd) < 0) | |
4047 | error ("Output file descriptor of %s closed", XSTRING (p->name)->data); | |
4048 | ||
4049 | p->decode_coding_system = Fcheck_coding_system (decoding); | |
4050 | p->encode_coding_system = Fcheck_coding_system (encoding); | |
4051 | setup_coding_system (decoding, | |
c7580538 | 4052 | proc_decode_coding_system[XINT (p->infd)]); |
0fa1789e | 4053 | setup_coding_system (encoding, |
c7580538 | 4054 | proc_encode_coding_system[XINT (p->outfd)]); |
0fa1789e KH |
4055 | |
4056 | return Qnil; | |
4057 | } | |
4058 | ||
4059 | DEFUN ("process-coding-system", | |
4060 | Fprocess_coding_system, Sprocess_coding_system, 1, 1, 0, | |
4061 | "Return a cons of coding-system for decoding and encoding of PROCESS.") | |
4062 | (proc) | |
4063 | register Lisp_Object proc; | |
4064 | { | |
4065 | CHECK_PROCESS (proc, 0); | |
4066 | return Fcons (XPROCESS (proc)->decode_coding_system, | |
4067 | XPROCESS (proc)->encode_coding_system); | |
4068 | } | |
d0d6b7c5 | 4069 | \f |
a69281ff RS |
4070 | /* The first time this is called, assume keyboard input comes from DESC |
4071 | instead of from where we used to expect it. | |
4072 | Subsequent calls mean assume input keyboard can come from DESC | |
4073 | in addition to other places. */ | |
4074 | ||
4075 | static int add_keyboard_wait_descriptor_called_flag; | |
4076 | ||
4077 | void | |
4078 | add_keyboard_wait_descriptor (desc) | |
4079 | int desc; | |
4080 | { | |
4081 | if (! add_keyboard_wait_descriptor_called_flag) | |
4082 | FD_CLR (0, &input_wait_mask); | |
4083 | add_keyboard_wait_descriptor_called_flag = 1; | |
4084 | FD_SET (desc, &input_wait_mask); | |
b5dc1c83 | 4085 | FD_SET (desc, &non_process_wait_mask); |
a69281ff RS |
4086 | if (desc > max_keyboard_desc) |
4087 | max_keyboard_desc = desc; | |
4088 | } | |
4089 | ||
4090 | /* From now on, do not expect DESC to give keyboard input. */ | |
4091 | ||
4092 | void | |
4093 | delete_keyboard_wait_descriptor (desc) | |
4094 | int desc; | |
4095 | { | |
4096 | int fd; | |
4097 | int lim = max_keyboard_desc; | |
4098 | ||
4099 | FD_CLR (desc, &input_wait_mask); | |
b5dc1c83 | 4100 | FD_CLR (desc, &non_process_wait_mask); |
a69281ff RS |
4101 | |
4102 | if (desc == max_keyboard_desc) | |
4103 | for (fd = 0; fd < lim; fd++) | |
4104 | if (FD_ISSET (fd, &input_wait_mask) | |
4105 | && !FD_ISSET (fd, &non_keyboard_wait_mask)) | |
4106 | max_keyboard_desc = fd; | |
4107 | } | |
4108 | ||
4109 | /* Return nonzero if *MASK has a bit set | |
4110 | that corresponds to one of the keyboard input descriptors. */ | |
4111 | ||
4112 | int | |
4113 | keyboard_bit_set (mask) | |
4114 | SELECT_TYPE *mask; | |
4115 | { | |
4116 | int fd; | |
4117 | ||
ee8e09af | 4118 | for (fd = 0; fd <= max_keyboard_desc; fd++) |
a69281ff RS |
4119 | if (FD_ISSET (fd, mask) && FD_ISSET (fd, &input_wait_mask) |
4120 | && !FD_ISSET (fd, &non_keyboard_wait_mask)) | |
4121 | return 1; | |
4122 | ||
4123 | return 0; | |
4124 | } | |
4125 | \f | |
d0d6b7c5 JB |
4126 | init_process () |
4127 | { | |
4128 | register int i; | |
4129 | ||
4130 | #ifdef SIGCHLD | |
4131 | #ifndef CANNOT_DUMP | |
4132 | if (! noninteractive || initialized) | |
4133 | #endif | |
4134 | signal (SIGCHLD, sigchld_handler); | |
4135 | #endif | |
4136 | ||
4137 | FD_ZERO (&input_wait_mask); | |
a69281ff | 4138 | FD_ZERO (&non_keyboard_wait_mask); |
b5dc1c83 | 4139 | FD_ZERO (&non_process_wait_mask); |
7d0e672e | 4140 | max_process_desc = 0; |
dd2281ae | 4141 | |
a69281ff | 4142 | FD_SET (0, &input_wait_mask); |
dd2281ae | 4143 | |
d0d6b7c5 JB |
4144 | Vprocess_alist = Qnil; |
4145 | for (i = 0; i < MAXDESC; i++) | |
4146 | { | |
4147 | chan_process[i] = Qnil; | |
4148 | proc_buffered_char[i] = -1; | |
4149 | } | |
c7580538 KH |
4150 | bzero (proc_decode_coding_system, sizeof proc_decode_coding_system); |
4151 | bzero (proc_encode_coding_system, sizeof proc_encode_coding_system); | |
d0d6b7c5 | 4152 | } |
312c9964 | 4153 | |
d0d6b7c5 JB |
4154 | syms_of_process () |
4155 | { | |
d0d6b7c5 JB |
4156 | Qprocessp = intern ("processp"); |
4157 | staticpro (&Qprocessp); | |
4158 | Qrun = intern ("run"); | |
4159 | staticpro (&Qrun); | |
4160 | Qstop = intern ("stop"); | |
4161 | staticpro (&Qstop); | |
4162 | Qsignal = intern ("signal"); | |
4163 | staticpro (&Qsignal); | |
4164 | ||
4165 | /* Qexit is already staticpro'd by syms_of_eval; don't staticpro it | |
4166 | here again. | |
4167 | ||
4168 | Qexit = intern ("exit"); | |
4169 | staticpro (&Qexit); */ | |
4170 | ||
4171 | Qopen = intern ("open"); | |
4172 | staticpro (&Qopen); | |
4173 | Qclosed = intern ("closed"); | |
4174 | staticpro (&Qclosed); | |
4175 | ||
6545aada RS |
4176 | Qlast_nonmenu_event = intern ("last-nonmenu-event"); |
4177 | staticpro (&Qlast_nonmenu_event); | |
4178 | ||
d0d6b7c5 JB |
4179 | staticpro (&Vprocess_alist); |
4180 | ||
4181 | DEFVAR_BOOL ("delete-exited-processes", &delete_exited_processes, | |
4182 | "*Non-nil means delete processes immediately when they exit.\n\ | |
4183 | nil means don't delete them until `list-processes' is run."); | |
4184 | ||
4185 | delete_exited_processes = 1; | |
4186 | ||
4187 | DEFVAR_LISP ("process-connection-type", &Vprocess_connection_type, | |
4188 | "Control type of device used to communicate with subprocesses.\n\ | |
e333e864 RS |
4189 | Values are nil to use a pipe, or t or `pty' to use a pty.\n\ |
4190 | The value has no effect if the system has no ptys or if all ptys are busy:\n\ | |
4191 | then a pipe is used in any case.\n\ | |
4192 | The value takes effect when `start-process' is called."); | |
d0d6b7c5 JB |
4193 | Vprocess_connection_type = Qt; |
4194 | ||
4195 | defsubr (&Sprocessp); | |
4196 | defsubr (&Sget_process); | |
4197 | defsubr (&Sget_buffer_process); | |
4198 | defsubr (&Sdelete_process); | |
4199 | defsubr (&Sprocess_status); | |
4200 | defsubr (&Sprocess_exit_status); | |
4201 | defsubr (&Sprocess_id); | |
4202 | defsubr (&Sprocess_name); | |
3b9a3dfa | 4203 | defsubr (&Sprocess_tty_name); |
d0d6b7c5 JB |
4204 | defsubr (&Sprocess_command); |
4205 | defsubr (&Sset_process_buffer); | |
4206 | defsubr (&Sprocess_buffer); | |
4207 | defsubr (&Sprocess_mark); | |
4208 | defsubr (&Sset_process_filter); | |
4209 | defsubr (&Sprocess_filter); | |
4210 | defsubr (&Sset_process_sentinel); | |
4211 | defsubr (&Sprocess_sentinel); | |
de282a05 | 4212 | defsubr (&Sset_process_window_size); |
d0d6b7c5 | 4213 | defsubr (&Sprocess_kill_without_query); |
de282a05 | 4214 | defsubr (&Sprocess_contact); |
d0d6b7c5 JB |
4215 | defsubr (&Slist_processes); |
4216 | defsubr (&Sprocess_list); | |
4217 | defsubr (&Sstart_process); | |
4218 | #ifdef HAVE_SOCKETS | |
4219 | defsubr (&Sopen_network_stream); | |
4220 | #endif /* HAVE_SOCKETS */ | |
4221 | defsubr (&Saccept_process_output); | |
4222 | defsubr (&Sprocess_send_region); | |
4223 | defsubr (&Sprocess_send_string); | |
4224 | defsubr (&Sinterrupt_process); | |
4225 | defsubr (&Skill_process); | |
4226 | defsubr (&Squit_process); | |
4227 | defsubr (&Sstop_process); | |
4228 | defsubr (&Scontinue_process); | |
4229 | defsubr (&Sprocess_send_eof); | |
4230 | defsubr (&Ssignal_process); | |
4231 | defsubr (&Swaiting_for_user_input_p); | |
4232 | /* defsubr (&Sprocess_connection); */ | |
0fa1789e KH |
4233 | defsubr (&Sset_process_coding_system); |
4234 | defsubr (&Sprocess_coding_system); | |
d0d6b7c5 JB |
4235 | } |
4236 | ||
6720a7fb JB |
4237 | \f |
4238 | #else /* not subprocesses */ | |
4239 | ||
4240 | #include <sys/types.h> | |
4241 | #include <errno.h> | |
4242 | ||
4243 | #include "lisp.h" | |
4244 | #include "systime.h" | |
4245 | #include "termopts.h" | |
81afb6d1 | 4246 | #include "sysselect.h" |
6720a7fb | 4247 | |
ff11dfa1 | 4248 | extern int frame_garbaged; |
6720a7fb | 4249 | |
f694e5d2 KH |
4250 | extern EMACS_TIME timer_check (); |
4251 | extern int timers_run; | |
6720a7fb JB |
4252 | |
4253 | /* As described above, except assuming that there are no subprocesses: | |
4254 | ||
4255 | Wait for timeout to elapse and/or keyboard input to be available. | |
4256 | ||
4257 | time_limit is: | |
4258 | timeout in seconds, or | |
4259 | zero for no limit, or | |
4260 | -1 means gobble data immediately available but don't wait for any. | |
4261 | ||
f76475ad | 4262 | read_kbd is a Lisp_Object: |
6720a7fb JB |
4263 | 0 to ignore keyboard input, or |
4264 | 1 to return when input is available, or | |
4265 | -1 means caller will actually read the input, so don't throw to | |
4266 | the quit handler. | |
0a65b032 RS |
4267 | a cons cell, meaning wait until its car is non-nil |
4268 | (and gobble terminal input into the buffer if any arrives), or | |
6720a7fb JB |
4269 | We know that read_kbd will never be a Lisp_Process, since |
4270 | `subprocesses' isn't defined. | |
4271 | ||
4272 | do_display != 0 means redisplay should be done to show subprocess | |
5164ee8e | 4273 | output that arrives. |
6720a7fb | 4274 | |
eb8c3be9 | 4275 | Return true iff we received input from any process. */ |
6720a7fb JB |
4276 | |
4277 | int | |
4278 | wait_reading_process_input (time_limit, microsecs, read_kbd, do_display) | |
f76475ad JB |
4279 | int time_limit, microsecs; |
4280 | Lisp_Object read_kbd; | |
4281 | int do_display; | |
6720a7fb | 4282 | { |
f694e5d2 | 4283 | EMACS_TIME end_time, timeout; |
8db121c4 | 4284 | SELECT_TYPE waitchannels; |
f694e5d2 | 4285 | int xerrno; |
0a65b032 RS |
4286 | Lisp_Object *wait_for_cell = 0; |
4287 | ||
4288 | /* If waiting for non-nil in a cell, record where. */ | |
4289 | if (CONSP (read_kbd)) | |
4290 | { | |
4291 | wait_for_cell = &XCONS (read_kbd)->car; | |
4292 | XSETFASTINT (read_kbd, 0); | |
4293 | } | |
6720a7fb JB |
4294 | |
4295 | /* What does time_limit really mean? */ | |
4296 | if (time_limit || microsecs) | |
4297 | { | |
6720a7fb JB |
4298 | if (time_limit == -1) |
4299 | /* In fact, it's zero. */ | |
4300 | EMACS_SET_SECS_USECS (timeout, 0, 0); | |
4301 | else | |
4302 | EMACS_SET_SECS_USECS (timeout, time_limit, microsecs); | |
4303 | ||
4304 | /* How far in the future is that? */ | |
4305 | EMACS_GET_TIME (end_time); | |
4306 | EMACS_ADD_TIME (end_time, end_time, timeout); | |
4307 | } | |
4308 | else | |
4309 | /* It's infinite. */ | |
f694e5d2 | 4310 | EMACS_SET_SECS_USECS (timeout, 100000, 0); |
6720a7fb JB |
4311 | |
4312 | /* Turn off periodic alarms (in case they are in use) | |
4313 | because the select emulator uses alarms. */ | |
4314 | stop_polling (); | |
4315 | ||
4316 | for (;;) | |
4317 | { | |
4318 | int nfds; | |
bae8d137 | 4319 | int timeout_reduced_for_timers = 0; |
6720a7fb | 4320 | |
6720a7fb JB |
4321 | /* If calling from keyboard input, do not quit |
4322 | since we want to return C-g as an input character. | |
4323 | Otherwise, do pending quit if requested. */ | |
f76475ad | 4324 | if (XINT (read_kbd) >= 0) |
6720a7fb JB |
4325 | QUIT; |
4326 | ||
0a65b032 RS |
4327 | /* Exit now if the cell we're waiting for became non-nil. */ |
4328 | if (wait_for_cell && ! NILP (*wait_for_cell)) | |
4329 | break; | |
4330 | ||
bae8d137 RS |
4331 | /* Compute time from now till when time limit is up */ |
4332 | /* Exit if already run out */ | |
f694e5d2 | 4333 | if (time_limit > 0 || microsecs) |
6720a7fb | 4334 | { |
f694e5d2 KH |
4335 | EMACS_GET_TIME (timeout); |
4336 | EMACS_SUB_TIME (timeout, end_time, timeout); | |
4337 | if (EMACS_TIME_NEG_P (timeout)) | |
6720a7fb JB |
4338 | break; |
4339 | } | |
4340 | ||
bae8d137 RS |
4341 | /* If our caller will not immediately handle keyboard events, |
4342 | run timer events directly. | |
4343 | (Callers that will immediately read keyboard events | |
4344 | call timer_delay on their own.) */ | |
f854a00b | 4345 | if (! wait_for_cell) |
bae8d137 RS |
4346 | { |
4347 | EMACS_TIME timer_delay; | |
0a65b032 RS |
4348 | int old_timers_run; |
4349 | ||
4350 | retry: | |
4351 | old_timers_run = timers_run; | |
bae8d137 RS |
4352 | timer_delay = timer_check (1); |
4353 | if (timers_run != old_timers_run && do_display) | |
0a65b032 RS |
4354 | { |
4355 | redisplay_preserve_echo_area (); | |
4356 | /* We must retry, since a timer may have requeued itself | |
4357 | and that could alter the time delay. */ | |
4358 | goto retry; | |
4359 | } | |
4360 | ||
f694e5d2 | 4361 | if (! EMACS_TIME_NEG_P (timer_delay) && time_limit != -1) |
bae8d137 RS |
4362 | { |
4363 | EMACS_TIME difference; | |
f694e5d2 | 4364 | EMACS_SUB_TIME (difference, timer_delay, timeout); |
bae8d137 RS |
4365 | if (EMACS_TIME_NEG_P (difference)) |
4366 | { | |
f694e5d2 | 4367 | timeout = timer_delay; |
bae8d137 RS |
4368 | timeout_reduced_for_timers = 1; |
4369 | } | |
4370 | } | |
4371 | } | |
4372 | ||
6720a7fb JB |
4373 | /* Cause C-g and alarm signals to take immediate action, |
4374 | and cause input available signals to zero out timeout. */ | |
f76475ad | 4375 | if (XINT (read_kbd) < 0) |
6720a7fb JB |
4376 | set_waiting_for_input (&timeout); |
4377 | ||
0a65b032 RS |
4378 | /* Wait till there is something to do. */ |
4379 | ||
4380 | if (! XINT (read_kbd) && wait_for_cell == 0) | |
4381 | FD_ZERO (&waitchannels); | |
4382 | else | |
4383 | FD_SET (0, &waitchannels); | |
4384 | ||
ff11dfa1 | 4385 | /* If a frame has been newly mapped and needs updating, |
6720a7fb | 4386 | reprocess its display stuff. */ |
5164ee8e | 4387 | if (frame_garbaged && do_display) |
0a65b032 RS |
4388 | { |
4389 | clear_waiting_for_input (); | |
4390 | redisplay_preserve_echo_area (); | |
4391 | if (XINT (read_kbd) < 0) | |
4392 | set_waiting_for_input (&timeout); | |
4393 | } | |
6720a7fb | 4394 | |
1861b214 RS |
4395 | if (XINT (read_kbd) && detect_input_pending ()) |
4396 | { | |
4397 | nfds = 0; | |
4398 | FD_ZERO (&waitchannels); | |
4399 | } | |
4400 | else | |
4401 | nfds = select (1, &waitchannels, (SELECT_TYPE *)0, (SELECT_TYPE *)0, | |
4402 | &timeout); | |
f694e5d2 KH |
4403 | |
4404 | xerrno = errno; | |
6720a7fb JB |
4405 | |
4406 | /* Make C-g and alarm signals set flags again */ | |
4407 | clear_waiting_for_input (); | |
4408 | ||
4409 | /* If we woke up due to SIGWINCH, actually change size now. */ | |
4410 | do_pending_window_change (); | |
4411 | ||
f694e5d2 KH |
4412 | if (time_limit && nfds == 0 && ! timeout_reduced_for_timers) |
4413 | /* We waited the full specified time, so return now. */ | |
4414 | break; | |
4415 | ||
6720a7fb JB |
4416 | if (nfds == -1) |
4417 | { | |
4418 | /* If the system call was interrupted, then go around the | |
4419 | loop again. */ | |
f694e5d2 | 4420 | if (xerrno == EINTR) |
8db121c4 | 4421 | FD_ZERO (&waitchannels); |
f694e5d2 KH |
4422 | else |
4423 | error ("select error: %s", strerror (xerrno)); | |
6720a7fb JB |
4424 | } |
4425 | #ifdef sun | |
4426 | else if (nfds > 0 && (waitchannels & 1) && interrupt_input) | |
4427 | /* System sometimes fails to deliver SIGIO. */ | |
4428 | kill (getpid (), SIGIO); | |
4429 | #endif | |
7324d660 | 4430 | #ifdef SIGIO |
f76475ad | 4431 | if (XINT (read_kbd) && interrupt_input && (waitchannels & 1)) |
e643c5be | 4432 | kill (getpid (), SIGIO); |
7324d660 | 4433 | #endif |
6720a7fb | 4434 | |
f694e5d2 KH |
4435 | /* Check for keyboard input */ |
4436 | ||
f854a00b | 4437 | if ((XINT (read_kbd) != 0) |
f694e5d2 KH |
4438 | && detect_input_pending_run_timers (do_display)) |
4439 | { | |
4440 | swallow_events (do_display); | |
4441 | if (detect_input_pending_run_timers (do_display)) | |
4442 | break; | |
4443 | } | |
0a65b032 | 4444 | |
f854a00b RS |
4445 | /* If wait_for_cell. check for keyboard input |
4446 | but don't run any timers. | |
4447 | ??? (It seems wrong to me to check for keyboard | |
4448 | input at all when wait_for_cell, but the code | |
4449 | has been this way since July 1994. | |
4450 | Try changing this after version 19.31.) */ | |
4451 | if (wait_for_cell | |
4452 | && detect_input_pending ()) | |
4453 | { | |
4454 | swallow_events (do_display); | |
4455 | if (detect_input_pending ()) | |
4456 | break; | |
4457 | } | |
4458 | ||
0a65b032 RS |
4459 | /* Exit now if the cell we're waiting for became non-nil. */ |
4460 | if (wait_for_cell && ! NILP (*wait_for_cell)) | |
4461 | break; | |
6720a7fb JB |
4462 | } |
4463 | ||
a87b802f JB |
4464 | start_polling (); |
4465 | ||
6720a7fb JB |
4466 | return 0; |
4467 | } | |
4468 | ||
4469 | ||
4470 | DEFUN ("get-buffer-process", Fget_buffer_process, Sget_buffer_process, 1, 1, 0, | |
51ab806a | 4471 | /* Don't confuse make-docfile by having two doc strings for this function. |
312c9964 RS |
4472 | make-docfile does not pay attention to #if, for good reason! */ |
4473 | 0) | |
6720a7fb JB |
4474 | (name) |
4475 | register Lisp_Object name; | |
4476 | { | |
4477 | return Qnil; | |
4478 | } | |
4479 | ||
4480 | /* Kill all processes associated with `buffer'. | |
4481 | If `buffer' is nil, kill all processes. | |
4482 | Since we have no subprocesses, this does nothing. */ | |
4483 | ||
4484 | kill_buffer_processes (buffer) | |
4485 | Lisp_Object buffer; | |
4486 | { | |
4487 | } | |
4488 | ||
4489 | init_process () | |
4490 | { | |
4491 | } | |
4492 | ||
4493 | syms_of_process () | |
4494 | { | |
4495 | defsubr (&Sget_buffer_process); | |
4496 | } | |
4497 | ||
4498 | \f | |
4499 | #endif /* not subprocesses */ |