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 | |
0c9960e9 RS |
110 | #define max(a, b) ((a) > (b) ? (a) : (b)) |
111 | ||
dd2281ae | 112 | Lisp_Object Qprocessp; |
d0d6b7c5 | 113 | Lisp_Object Qrun, Qstop, Qsignal, Qopen, Qclosed; |
6545aada | 114 | Lisp_Object Qlast_nonmenu_event; |
d0d6b7c5 JB |
115 | /* Qexit is declared and initialized in eval.c. */ |
116 | ||
117 | /* a process object is a network connection when its childp field is neither | |
de282a05 | 118 | Qt nor Qnil but is instead a cons cell (HOSTNAME PORTNUM). */ |
d0d6b7c5 JB |
119 | |
120 | #ifdef HAVE_SOCKETS | |
de282a05 | 121 | #define NETCONN_P(p) (GC_CONSP (XPROCESS (p)->childp)) |
d0d6b7c5 JB |
122 | #else |
123 | #define NETCONN_P(p) 0 | |
124 | #endif /* HAVE_SOCKETS */ | |
125 | ||
126 | /* Define first descriptor number available for subprocesses. */ | |
127 | #ifdef VMS | |
128 | #define FIRST_PROC_DESC 1 | |
129 | #else /* Not VMS */ | |
130 | #define FIRST_PROC_DESC 3 | |
131 | #endif | |
132 | ||
133 | /* Define SIGCHLD as an alias for SIGCLD. There are many conditionals | |
134 | testing SIGCHLD. */ | |
135 | ||
136 | #if !defined (SIGCHLD) && defined (SIGCLD) | |
137 | #define SIGCHLD SIGCLD | |
138 | #endif /* SIGCLD */ | |
139 | ||
140 | #include "syssignal.h" | |
141 | ||
889255b4 | 142 | #include "syswait.h" |
d0d6b7c5 | 143 | |
b062d1fe RM |
144 | extern int errno; |
145 | extern char *strerror (); | |
146 | #ifdef VMS | |
d0d6b7c5 | 147 | extern char *sys_errlist[]; |
b062d1fe | 148 | #endif |
d0d6b7c5 | 149 | |
5f0929a7 RS |
150 | #ifndef HAVE_H_ERRNO |
151 | extern int h_errno; | |
152 | #endif | |
153 | ||
a86928f7 | 154 | #ifndef SYS_SIGLIST_DECLARED |
d0d6b7c5 JB |
155 | #ifndef VMS |
156 | #ifndef BSD4_1 | |
e98d950b | 157 | #ifndef WINDOWSNT |
084fd64a | 158 | #ifndef LINUX |
d0d6b7c5 | 159 | extern char *sys_siglist[]; |
a0e4d3f3 RS |
160 | #endif /* not LINUX */ |
161 | #else /* BSD4_1 */ | |
d0d6b7c5 JB |
162 | char *sys_siglist[] = |
163 | { | |
164 | "bum signal!!", | |
165 | "hangup", | |
166 | "interrupt", | |
167 | "quit", | |
168 | "illegal instruction", | |
169 | "trace trap", | |
170 | "iot instruction", | |
171 | "emt instruction", | |
172 | "floating point exception", | |
173 | "kill", | |
174 | "bus error", | |
175 | "segmentation violation", | |
176 | "bad argument to system call", | |
177 | "write on a pipe with no one to read it", | |
178 | "alarm clock", | |
179 | "software termination signal from kill", | |
180 | "status signal", | |
181 | "sendable stop signal not from tty", | |
182 | "stop signal from tty", | |
183 | "continue a stopped process", | |
184 | "child status has changed", | |
185 | "background read attempted from control tty", | |
186 | "background write attempted from control tty", | |
187 | "input record available at control tty", | |
188 | "exceeded CPU time limit", | |
189 | "exceeded file size limit" | |
190 | }; | |
e98d950b | 191 | #endif /* not WINDOWSNT */ |
d0d6b7c5 JB |
192 | #endif |
193 | #endif /* VMS */ | |
a86928f7 | 194 | #endif /* ! SYS_SIGLIST_DECLARED */ |
d0d6b7c5 | 195 | |
d0d6b7c5 JB |
196 | /* t means use pty, nil means use a pipe, |
197 | maybe other values to come. */ | |
dd2281ae | 198 | static Lisp_Object Vprocess_connection_type; |
d0d6b7c5 JB |
199 | |
200 | #ifdef SKTPAIR | |
201 | #ifndef HAVE_SOCKETS | |
202 | #include <sys/socket.h> | |
203 | #endif | |
204 | #endif /* SKTPAIR */ | |
205 | ||
17d02632 KH |
206 | /* These next two vars are non-static since sysdep.c uses them in the |
207 | emulation of `select'. */ | |
d0d6b7c5 | 208 | /* Number of events of change of status of a process. */ |
17d02632 | 209 | int process_tick; |
d0d6b7c5 | 210 | /* Number of events for which the user or sentinel has been notified. */ |
17d02632 | 211 | int update_tick; |
d0d6b7c5 | 212 | |
5886acf9 | 213 | #include "sysselect.h" |
d0d6b7c5 | 214 | |
583dcae4 | 215 | /* If we support a window system, turn on the code to poll periodically |
44ade2e9 | 216 | to detect C-g. It isn't actually used when doing interrupt input. */ |
583dcae4 | 217 | #ifdef HAVE_WINDOW_SYSTEM |
44ade2e9 RS |
218 | #define POLL_FOR_INPUT |
219 | #endif | |
220 | ||
a69281ff | 221 | /* Mask of bits indicating the descriptors that we wait for input on. */ |
d0d6b7c5 | 222 | |
dd2281ae RS |
223 | static SELECT_TYPE input_wait_mask; |
224 | ||
a69281ff RS |
225 | /* Mask that excludes keyboard input descriptor (s). */ |
226 | ||
227 | static SELECT_TYPE non_keyboard_wait_mask; | |
228 | ||
b5dc1c83 RS |
229 | /* Mask that excludes process input descriptor (s). */ |
230 | ||
231 | static SELECT_TYPE non_process_wait_mask; | |
232 | ||
7d0e672e RS |
233 | /* The largest descriptor currently in use for a process object. */ |
234 | static int max_process_desc; | |
235 | ||
a69281ff RS |
236 | /* The largest descriptor currently in use for keyboard input. */ |
237 | static int max_keyboard_desc; | |
d0d6b7c5 | 238 | |
dd2281ae RS |
239 | /* Nonzero means delete a process right away if it exits. */ |
240 | static int delete_exited_processes; | |
d0d6b7c5 JB |
241 | |
242 | /* Indexed by descriptor, gives the process (if any) for that descriptor */ | |
41f3aa98 | 243 | Lisp_Object chan_process[MAXDESC]; |
d0d6b7c5 JB |
244 | |
245 | /* Alist of elements (NAME . PROCESS) */ | |
41f3aa98 | 246 | Lisp_Object Vprocess_alist; |
d0d6b7c5 JB |
247 | |
248 | /* Buffered-ahead input char from process, indexed by channel. | |
249 | -1 means empty (no char is buffered). | |
250 | Used on sys V where the only way to tell if there is any | |
251 | output from the process is to read at least one char. | |
252 | Always -1 on systems that support FIONREAD. */ | |
253 | ||
e98d950b RS |
254 | /* Don't make static; need to access externally. */ |
255 | int proc_buffered_char[MAXDESC]; | |
dd2281ae | 256 | |
0fa1789e | 257 | /* Table of `struct coding-system' for each process. */ |
c7580538 KH |
258 | static struct coding_system *proc_decode_coding_system[MAXDESC]; |
259 | static struct coding_system *proc_encode_coding_system[MAXDESC]; | |
0fa1789e | 260 | |
dd2281ae | 261 | static Lisp_Object get_process (); |
93b4f699 | 262 | |
fb4c3627 | 263 | extern EMACS_TIME timer_check (); |
5de50bfb | 264 | extern int timers_run; |
fb4c3627 | 265 | |
93b4f699 RS |
266 | /* Maximum number of bytes to send to a pty without an eof. */ |
267 | static int pty_max_bytes; | |
3b9a3dfa | 268 | |
875e6b94 KH |
269 | #ifdef HAVE_PTYS |
270 | /* The file name of the pty opened by allocate_pty. */ | |
3b9a3dfa RS |
271 | |
272 | static char pty_name[24]; | |
875e6b94 | 273 | #endif |
d0d6b7c5 JB |
274 | \f |
275 | /* Compute the Lisp form of the process status, p->status, from | |
276 | the numeric status that was returned by `wait'. */ | |
277 | ||
f9738840 JB |
278 | Lisp_Object status_convert (); |
279 | ||
d0d6b7c5 JB |
280 | update_status (p) |
281 | struct Lisp_Process *p; | |
282 | { | |
283 | union { int i; WAITTYPE wt; } u; | |
284 | u.i = XFASTINT (p->raw_status_low) + (XFASTINT (p->raw_status_high) << 16); | |
285 | p->status = status_convert (u.wt); | |
286 | p->raw_status_low = Qnil; | |
287 | p->raw_status_high = Qnil; | |
288 | } | |
289 | ||
91d10fa8 | 290 | /* Convert a process status word in Unix format to |
d0d6b7c5 JB |
291 | the list that we use internally. */ |
292 | ||
293 | Lisp_Object | |
294 | status_convert (w) | |
295 | WAITTYPE w; | |
296 | { | |
297 | if (WIFSTOPPED (w)) | |
298 | return Fcons (Qstop, Fcons (make_number (WSTOPSIG (w)), Qnil)); | |
299 | else if (WIFEXITED (w)) | |
300 | return Fcons (Qexit, Fcons (make_number (WRETCODE (w)), | |
301 | WCOREDUMP (w) ? Qt : Qnil)); | |
302 | else if (WIFSIGNALED (w)) | |
303 | return Fcons (Qsignal, Fcons (make_number (WTERMSIG (w)), | |
304 | WCOREDUMP (w) ? Qt : Qnil)); | |
305 | else | |
306 | return Qrun; | |
307 | } | |
308 | ||
309 | /* Given a status-list, extract the three pieces of information | |
310 | and store them individually through the three pointers. */ | |
311 | ||
312 | void | |
313 | decode_status (l, symbol, code, coredump) | |
314 | Lisp_Object l; | |
315 | Lisp_Object *symbol; | |
316 | int *code; | |
317 | int *coredump; | |
318 | { | |
319 | Lisp_Object tem; | |
320 | ||
bcd69aea | 321 | if (SYMBOLP (l)) |
d0d6b7c5 JB |
322 | { |
323 | *symbol = l; | |
324 | *code = 0; | |
325 | *coredump = 0; | |
326 | } | |
327 | else | |
328 | { | |
329 | *symbol = XCONS (l)->car; | |
330 | tem = XCONS (l)->cdr; | |
331 | *code = XFASTINT (XCONS (tem)->car); | |
f9738840 | 332 | tem = XCONS (tem)->cdr; |
d0d6b7c5 JB |
333 | *coredump = !NILP (tem); |
334 | } | |
335 | } | |
336 | ||
337 | /* Return a string describing a process status list. */ | |
338 | ||
339 | Lisp_Object | |
340 | status_message (status) | |
341 | Lisp_Object status; | |
342 | { | |
343 | Lisp_Object symbol; | |
344 | int code, coredump; | |
345 | Lisp_Object string, string2; | |
346 | ||
347 | decode_status (status, &symbol, &code, &coredump); | |
348 | ||
349 | if (EQ (symbol, Qsignal) || EQ (symbol, Qstop)) | |
350 | { | |
b97ad9ea RS |
351 | char *signame = 0; |
352 | if (code < NSIG) | |
353 | { | |
b0310da4 | 354 | #ifndef VMS |
ed0cae05 RS |
355 | /* Cast to suppress warning if the table has const char *. */ |
356 | signame = (char *) sys_siglist[code]; | |
b0310da4 | 357 | #else |
b97ad9ea | 358 | signame = sys_errlist[code]; |
b0310da4 | 359 | #endif |
b97ad9ea RS |
360 | } |
361 | if (signame == 0) | |
362 | signame = "unknown"; | |
363 | string = build_string (signame); | |
d0d6b7c5 JB |
364 | string2 = build_string (coredump ? " (core dumped)\n" : "\n"); |
365 | XSTRING (string)->data[0] = DOWNCASE (XSTRING (string)->data[0]); | |
366 | return concat2 (string, string2); | |
367 | } | |
368 | else if (EQ (symbol, Qexit)) | |
369 | { | |
370 | if (code == 0) | |
371 | return build_string ("finished\n"); | |
f2980264 | 372 | string = Fnumber_to_string (make_number (code)); |
d0d6b7c5 JB |
373 | string2 = build_string (coredump ? " (core dumped)\n" : "\n"); |
374 | return concat2 (build_string ("exited abnormally with code "), | |
375 | concat2 (string, string2)); | |
376 | } | |
377 | else | |
378 | return Fcopy_sequence (Fsymbol_name (symbol)); | |
379 | } | |
380 | \f | |
381 | #ifdef HAVE_PTYS | |
d0d6b7c5 | 382 | |
875e6b94 KH |
383 | /* Open an available pty, returning a file descriptor. |
384 | Return -1 on failure. | |
385 | The file name of the terminal corresponding to the pty | |
386 | is left in the variable pty_name. */ | |
387 | ||
d0d6b7c5 JB |
388 | int |
389 | allocate_pty () | |
390 | { | |
391 | struct stat stb; | |
392 | register c, i; | |
393 | int fd; | |
394 | ||
32676c08 JB |
395 | /* Some systems name their pseudoterminals so that there are gaps in |
396 | the usual sequence - for example, on HP9000/S700 systems, there | |
397 | are no pseudoterminals with names ending in 'f'. So we wait for | |
398 | three failures in a row before deciding that we've reached the | |
399 | end of the ptys. */ | |
400 | int failed_count = 0; | |
401 | ||
d0d6b7c5 JB |
402 | #ifdef PTY_ITERATION |
403 | PTY_ITERATION | |
404 | #else | |
405 | for (c = FIRST_PTY_LETTER; c <= 'z'; c++) | |
406 | for (i = 0; i < 16; i++) | |
407 | #endif | |
408 | { | |
409 | #ifdef PTY_NAME_SPRINTF | |
410 | PTY_NAME_SPRINTF | |
d0d6b7c5 JB |
411 | #else |
412 | sprintf (pty_name, "/dev/pty%c%x", c, i); | |
d0d6b7c5 JB |
413 | #endif /* no PTY_NAME_SPRINTF */ |
414 | ||
4d7c105e RS |
415 | #ifdef PTY_OPEN |
416 | PTY_OPEN; | |
417 | #else /* no PTY_OPEN */ | |
32676c08 JB |
418 | #ifdef IRIS |
419 | /* Unusual IRIS code */ | |
420 | *ptyv = open ("/dev/ptc", O_RDWR | O_NDELAY, 0); | |
421 | if (fd < 0) | |
422 | return -1; | |
423 | if (fstat (fd, &stb) < 0) | |
d0d6b7c5 | 424 | return -1; |
4d7c105e | 425 | #else /* not IRIS */ |
32676c08 JB |
426 | if (stat (pty_name, &stb) < 0) |
427 | { | |
428 | failed_count++; | |
429 | if (failed_count >= 3) | |
430 | return -1; | |
431 | } | |
432 | else | |
433 | failed_count = 0; | |
d0d6b7c5 JB |
434 | #ifdef O_NONBLOCK |
435 | fd = open (pty_name, O_RDWR | O_NONBLOCK, 0); | |
436 | #else | |
437 | fd = open (pty_name, O_RDWR | O_NDELAY, 0); | |
438 | #endif | |
4d7c105e RS |
439 | #endif /* not IRIS */ |
440 | #endif /* no PTY_OPEN */ | |
d0d6b7c5 JB |
441 | |
442 | if (fd >= 0) | |
443 | { | |
444 | /* check to make certain that both sides are available | |
445 | this avoids a nasty yet stupid bug in rlogins */ | |
446 | #ifdef PTY_TTY_NAME_SPRINTF | |
447 | PTY_TTY_NAME_SPRINTF | |
d0d6b7c5 JB |
448 | #else |
449 | sprintf (pty_name, "/dev/tty%c%x", c, i); | |
d0d6b7c5 JB |
450 | #endif /* no PTY_TTY_NAME_SPRINTF */ |
451 | #ifndef UNIPLUS | |
452 | if (access (pty_name, 6) != 0) | |
453 | { | |
454 | close (fd); | |
fad97cbe | 455 | #if !defined(IRIS) && !defined(__sgi) |
d0d6b7c5 JB |
456 | continue; |
457 | #else | |
458 | return -1; | |
459 | #endif /* IRIS */ | |
460 | } | |
461 | #endif /* not UNIPLUS */ | |
462 | setup_pty (fd); | |
463 | return fd; | |
464 | } | |
465 | } | |
466 | return -1; | |
467 | } | |
468 | #endif /* HAVE_PTYS */ | |
469 | \f | |
470 | Lisp_Object | |
471 | make_process (name) | |
472 | Lisp_Object name; | |
473 | { | |
23d6bb9c | 474 | struct Lisp_Vector *vec; |
d0d6b7c5 JB |
475 | register Lisp_Object val, tem, name1; |
476 | register struct Lisp_Process *p; | |
477 | char suffix[10]; | |
478 | register int i; | |
479 | ||
23d6bb9c KH |
480 | vec = allocate_vectorlike ((EMACS_INT) VECSIZE (struct Lisp_Process)); |
481 | for (i = 0; i < VECSIZE (struct Lisp_Process); i++) | |
482 | vec->contents[i] = Qnil; | |
483 | vec->size = VECSIZE (struct Lisp_Process); | |
484 | p = (struct Lisp_Process *)vec; | |
485 | ||
1d056e64 KH |
486 | XSETINT (p->infd, -1); |
487 | XSETINT (p->outfd, -1); | |
22719df2 KH |
488 | XSETFASTINT (p->pid, 0); |
489 | XSETFASTINT (p->tick, 0); | |
490 | XSETFASTINT (p->update_tick, 0); | |
d0d6b7c5 JB |
491 | p->raw_status_low = Qnil; |
492 | p->raw_status_high = Qnil; | |
493 | p->status = Qrun; | |
494 | p->mark = Fmake_marker (); | |
495 | ||
496 | /* If name is already in use, modify it until it is unused. */ | |
497 | ||
498 | name1 = name; | |
499 | for (i = 1; ; i++) | |
500 | { | |
501 | tem = Fget_process (name1); | |
502 | if (NILP (tem)) break; | |
503 | sprintf (suffix, "<%d>", i); | |
504 | name1 = concat2 (name, build_string (suffix)); | |
505 | } | |
506 | name = name1; | |
507 | p->name = name; | |
23d6bb9c | 508 | XSETPROCESS (val, p); |
d0d6b7c5 JB |
509 | Vprocess_alist = Fcons (Fcons (name, val), Vprocess_alist); |
510 | return val; | |
511 | } | |
512 | ||
513 | remove_process (proc) | |
514 | register Lisp_Object proc; | |
515 | { | |
516 | register Lisp_Object pair; | |
517 | ||
518 | pair = Frassq (proc, Vprocess_alist); | |
519 | Vprocess_alist = Fdelq (pair, Vprocess_alist); | |
d0d6b7c5 JB |
520 | |
521 | deactivate_process (proc); | |
522 | } | |
523 | \f | |
524 | DEFUN ("processp", Fprocessp, Sprocessp, 1, 1, 0, | |
525 | "Return t if OBJECT is a process.") | |
4ee3e309 EN |
526 | (object) |
527 | Lisp_Object object; | |
d0d6b7c5 | 528 | { |
4ee3e309 | 529 | return PROCESSP (object) ? Qt : Qnil; |
d0d6b7c5 JB |
530 | } |
531 | ||
532 | DEFUN ("get-process", Fget_process, Sget_process, 1, 1, 0, | |
533 | "Return the process named NAME, or nil if there is none.") | |
534 | (name) | |
535 | register Lisp_Object name; | |
536 | { | |
bcd69aea | 537 | if (PROCESSP (name)) |
d0d6b7c5 JB |
538 | return name; |
539 | CHECK_STRING (name, 0); | |
540 | return Fcdr (Fassoc (name, Vprocess_alist)); | |
541 | } | |
542 | ||
543 | DEFUN ("get-buffer-process", Fget_buffer_process, Sget_buffer_process, 1, 1, 0, | |
544 | "Return the (or, a) process associated with BUFFER.\n\ | |
545 | BUFFER may be a buffer or the name of one.") | |
4ee3e309 EN |
546 | (buffer) |
547 | register Lisp_Object buffer; | |
d0d6b7c5 JB |
548 | { |
549 | register Lisp_Object buf, tail, proc; | |
550 | ||
4ee3e309 EN |
551 | if (NILP (buffer)) return Qnil; |
552 | buf = Fget_buffer (buffer); | |
d0d6b7c5 JB |
553 | if (NILP (buf)) return Qnil; |
554 | ||
555 | for (tail = Vprocess_alist; !NILP (tail); tail = Fcdr (tail)) | |
556 | { | |
557 | proc = Fcdr (Fcar (tail)); | |
bcd69aea | 558 | if (PROCESSP (proc) && EQ (XPROCESS (proc)->buffer, buf)) |
d0d6b7c5 JB |
559 | return proc; |
560 | } | |
561 | return Qnil; | |
562 | } | |
563 | ||
ebb9e16f JB |
564 | /* This is how commands for the user decode process arguments. It |
565 | accepts a process, a process name, a buffer, a buffer name, or nil. | |
566 | Buffers denote the first process in the buffer, and nil denotes the | |
567 | current buffer. */ | |
d0d6b7c5 | 568 | |
77b221b1 | 569 | static Lisp_Object |
d0d6b7c5 JB |
570 | get_process (name) |
571 | register Lisp_Object name; | |
572 | { | |
1619761d KH |
573 | register Lisp_Object proc, obj; |
574 | if (STRINGP (name)) | |
575 | { | |
576 | obj = Fget_process (name); | |
577 | if (NILP (obj)) | |
578 | obj = Fget_buffer (name); | |
579 | if (NILP (obj)) | |
580 | error ("Process %s does not exist", XSTRING (name)->data); | |
581 | } | |
582 | else if (NILP (name)) | |
583 | obj = Fcurrent_buffer (); | |
d0d6b7c5 | 584 | else |
1619761d KH |
585 | obj = name; |
586 | ||
587 | /* Now obj should be either a buffer object or a process object. | |
588 | */ | |
589 | if (BUFFERP (obj)) | |
d0d6b7c5 | 590 | { |
1619761d | 591 | proc = Fget_buffer_process (obj); |
d0d6b7c5 | 592 | if (NILP (proc)) |
1619761d | 593 | error ("Buffer %s has no process", XSTRING (XBUFFER (obj)->name)->data); |
d0d6b7c5 | 594 | } |
d0d6b7c5 | 595 | else |
1619761d KH |
596 | { |
597 | CHECK_PROCESS (obj, 0); | |
598 | proc = obj; | |
599 | } | |
600 | return proc; | |
d0d6b7c5 JB |
601 | } |
602 | ||
603 | DEFUN ("delete-process", Fdelete_process, Sdelete_process, 1, 1, 0, | |
604 | "Delete PROCESS: kill it and forget about it immediately.\n\ | |
ebb9e16f JB |
605 | PROCESS may be a process, a buffer, the name of a process or buffer, or\n\ |
606 | nil, indicating the current buffer's process.") | |
4ee3e309 EN |
607 | (process) |
608 | register Lisp_Object process; | |
d0d6b7c5 | 609 | { |
4ee3e309 EN |
610 | process = get_process (process); |
611 | XPROCESS (process)->raw_status_low = Qnil; | |
612 | XPROCESS (process)->raw_status_high = Qnil; | |
613 | if (NETCONN_P (process)) | |
d0d6b7c5 | 614 | { |
4ee3e309 EN |
615 | XPROCESS (process)->status = Fcons (Qexit, Fcons (make_number (0), Qnil)); |
616 | XSETINT (XPROCESS (process)->tick, ++process_tick); | |
d0d6b7c5 | 617 | } |
4ee3e309 | 618 | else if (XINT (XPROCESS (process)->infd) >= 0) |
d0d6b7c5 | 619 | { |
4ee3e309 | 620 | Fkill_process (process, Qnil); |
d0d6b7c5 | 621 | /* Do this now, since remove_process will make sigchld_handler do nothing. */ |
4ee3e309 | 622 | XPROCESS (process)->status |
d0d6b7c5 | 623 | = Fcons (Qsignal, Fcons (make_number (SIGKILL), Qnil)); |
4ee3e309 | 624 | XSETINT (XPROCESS (process)->tick, ++process_tick); |
d0d6b7c5 JB |
625 | status_notify (); |
626 | } | |
4ee3e309 | 627 | remove_process (process); |
d0d6b7c5 JB |
628 | return Qnil; |
629 | } | |
630 | \f | |
631 | DEFUN ("process-status", Fprocess_status, Sprocess_status, 1, 1, 0, | |
632 | "Return the status of PROCESS: a symbol, one of these:\n\ | |
633 | run -- for a process that is running.\n\ | |
634 | stop -- for a process stopped but continuable.\n\ | |
635 | exit -- for a process that has exited.\n\ | |
636 | signal -- for a process that has got a fatal signal.\n\ | |
637 | open -- for a network stream connection that is open.\n\ | |
638 | closed -- for a network stream connection that is closed.\n\ | |
ebb9e16f JB |
639 | nil -- if arg is a process name and no such process exists.\n\ |
640 | PROCESS may be a process, a buffer, the name of a process or buffer, or\n\ | |
641 | nil, indicating the current buffer's process.") | |
4ee3e309 EN |
642 | (process) |
643 | register Lisp_Object process; | |
d0d6b7c5 JB |
644 | { |
645 | register struct Lisp_Process *p; | |
646 | register Lisp_Object status; | |
343f4114 | 647 | |
4ee3e309 EN |
648 | if (STRINGP (process)) |
649 | process = Fget_process (process); | |
343f4114 | 650 | else |
4ee3e309 | 651 | process = get_process (process); |
343f4114 | 652 | |
4ee3e309 EN |
653 | if (NILP (process)) |
654 | return process; | |
343f4114 | 655 | |
4ee3e309 | 656 | p = XPROCESS (process); |
d0d6b7c5 JB |
657 | if (!NILP (p->raw_status_low)) |
658 | update_status (p); | |
659 | status = p->status; | |
bcd69aea | 660 | if (CONSP (status)) |
d0d6b7c5 | 661 | status = XCONS (status)->car; |
4ee3e309 | 662 | if (NETCONN_P (process)) |
d0d6b7c5 JB |
663 | { |
664 | if (EQ (status, Qrun)) | |
665 | status = Qopen; | |
666 | else if (EQ (status, Qexit)) | |
667 | status = Qclosed; | |
668 | } | |
669 | return status; | |
670 | } | |
671 | ||
672 | DEFUN ("process-exit-status", Fprocess_exit_status, Sprocess_exit_status, | |
673 | 1, 1, 0, | |
674 | "Return the exit status of PROCESS or the signal number that killed it.\n\ | |
675 | If PROCESS has not yet exited or died, return 0.") | |
4ee3e309 EN |
676 | (process) |
677 | register Lisp_Object process; | |
d0d6b7c5 | 678 | { |
4ee3e309 EN |
679 | CHECK_PROCESS (process, 0); |
680 | if (!NILP (XPROCESS (process)->raw_status_low)) | |
681 | update_status (XPROCESS (process)); | |
682 | if (CONSP (XPROCESS (process)->status)) | |
683 | return XCONS (XCONS (XPROCESS (process)->status)->cdr)->car; | |
d0d6b7c5 JB |
684 | return make_number (0); |
685 | } | |
686 | ||
687 | DEFUN ("process-id", Fprocess_id, Sprocess_id, 1, 1, 0, | |
688 | "Return the process id of PROCESS.\n\ | |
689 | This is the pid of the Unix process which PROCESS uses or talks to.\n\ | |
690 | For a network connection, this value is nil.") | |
4ee3e309 EN |
691 | (process) |
692 | register Lisp_Object process; | |
d0d6b7c5 | 693 | { |
4ee3e309 EN |
694 | CHECK_PROCESS (process, 0); |
695 | return XPROCESS (process)->pid; | |
d0d6b7c5 JB |
696 | } |
697 | ||
698 | DEFUN ("process-name", Fprocess_name, Sprocess_name, 1, 1, 0, | |
699 | "Return the name of PROCESS, as a string.\n\ | |
700 | This is the name of the program invoked in PROCESS,\n\ | |
701 | possibly modified to make it unique among process names.") | |
4ee3e309 EN |
702 | (process) |
703 | register Lisp_Object process; | |
d0d6b7c5 | 704 | { |
4ee3e309 EN |
705 | CHECK_PROCESS (process, 0); |
706 | return XPROCESS (process)->name; | |
d0d6b7c5 JB |
707 | } |
708 | ||
709 | DEFUN ("process-command", Fprocess_command, Sprocess_command, 1, 1, 0, | |
710 | "Return the command that was executed to start PROCESS.\n\ | |
711 | This is a list of strings, the first string being the program executed\n\ | |
712 | and the rest of the strings being the arguments given to it.\n\ | |
713 | For a non-child channel, this is nil.") | |
4ee3e309 EN |
714 | (process) |
715 | register Lisp_Object process; | |
d0d6b7c5 | 716 | { |
4ee3e309 EN |
717 | CHECK_PROCESS (process, 0); |
718 | return XPROCESS (process)->command; | |
d0d6b7c5 JB |
719 | } |
720 | ||
3b9a3dfa RS |
721 | DEFUN ("process-tty-name", Fprocess_tty_name, Sprocess_tty_name, 1, 1, 0, |
722 | "Return the name of the terminal PROCESS uses, or nil if none.\n\ | |
723 | This is the terminal that the process itself reads and writes on,\n\ | |
724 | not the name of the pty that Emacs uses to talk with that terminal.") | |
4ee3e309 EN |
725 | (process) |
726 | register Lisp_Object process; | |
3b9a3dfa | 727 | { |
4ee3e309 EN |
728 | CHECK_PROCESS (process, 0); |
729 | return XPROCESS (process)->tty_name; | |
3b9a3dfa RS |
730 | } |
731 | ||
d0d6b7c5 JB |
732 | DEFUN ("set-process-buffer", Fset_process_buffer, Sset_process_buffer, |
733 | 2, 2, 0, | |
734 | "Set buffer associated with PROCESS to BUFFER (a buffer, or nil).") | |
4ee3e309 EN |
735 | (process, buffer) |
736 | register Lisp_Object process, buffer; | |
d0d6b7c5 | 737 | { |
4ee3e309 | 738 | CHECK_PROCESS (process, 0); |
d0d6b7c5 JB |
739 | if (!NILP (buffer)) |
740 | CHECK_BUFFER (buffer, 1); | |
4ee3e309 | 741 | XPROCESS (process)->buffer = buffer; |
d0d6b7c5 JB |
742 | return buffer; |
743 | } | |
744 | ||
745 | DEFUN ("process-buffer", Fprocess_buffer, Sprocess_buffer, | |
746 | 1, 1, 0, | |
747 | "Return the buffer PROCESS is associated with.\n\ | |
748 | Output from PROCESS is inserted in this buffer\n\ | |
749 | unless PROCESS has a filter.") | |
4ee3e309 EN |
750 | (process) |
751 | register Lisp_Object process; | |
d0d6b7c5 | 752 | { |
4ee3e309 EN |
753 | CHECK_PROCESS (process, 0); |
754 | return XPROCESS (process)->buffer; | |
d0d6b7c5 JB |
755 | } |
756 | ||
757 | DEFUN ("process-mark", Fprocess_mark, Sprocess_mark, | |
758 | 1, 1, 0, | |
759 | "Return the marker for the end of the last output from PROCESS.") | |
4ee3e309 EN |
760 | (process) |
761 | register Lisp_Object process; | |
d0d6b7c5 | 762 | { |
4ee3e309 EN |
763 | CHECK_PROCESS (process, 0); |
764 | return XPROCESS (process)->mark; | |
d0d6b7c5 JB |
765 | } |
766 | ||
767 | DEFUN ("set-process-filter", Fset_process_filter, Sset_process_filter, | |
768 | 2, 2, 0, | |
769 | "Give PROCESS the filter function FILTER; nil means no filter.\n\ | |
20ddfff7 | 770 | t means stop accepting output from the process.\n\ |
d0d6b7c5 JB |
771 | When a process has a filter, each time it does output\n\ |
772 | the entire string of output is passed to the filter.\n\ | |
773 | The filter gets two arguments: the process and the string of output.\n\ | |
774 | If the process has a filter, its buffer is not used for output.") | |
4ee3e309 EN |
775 | (process, filter) |
776 | register Lisp_Object process, filter; | |
d0d6b7c5 | 777 | { |
4ee3e309 | 778 | CHECK_PROCESS (process, 0); |
20ddfff7 | 779 | if (EQ (filter, Qt)) |
a69281ff | 780 | { |
4ee3e309 EN |
781 | FD_CLR (XINT (XPROCESS (process)->infd), &input_wait_mask); |
782 | FD_CLR (XINT (XPROCESS (process)->infd), &non_keyboard_wait_mask); | |
a69281ff | 783 | } |
4ee3e309 | 784 | else if (EQ (XPROCESS (process)->filter, Qt)) |
a69281ff | 785 | { |
4ee3e309 EN |
786 | FD_SET (XINT (XPROCESS (process)->infd), &input_wait_mask); |
787 | FD_SET (XINT (XPROCESS (process)->infd), &non_keyboard_wait_mask); | |
a69281ff | 788 | } |
4ee3e309 | 789 | XPROCESS (process)->filter = filter; |
d0d6b7c5 JB |
790 | return filter; |
791 | } | |
792 | ||
793 | DEFUN ("process-filter", Fprocess_filter, Sprocess_filter, | |
794 | 1, 1, 0, | |
795 | "Returns the filter function of PROCESS; nil if none.\n\ | |
796 | See `set-process-filter' for more info on filter functions.") | |
4ee3e309 EN |
797 | (process) |
798 | register Lisp_Object process; | |
d0d6b7c5 | 799 | { |
4ee3e309 EN |
800 | CHECK_PROCESS (process, 0); |
801 | return XPROCESS (process)->filter; | |
d0d6b7c5 JB |
802 | } |
803 | ||
804 | DEFUN ("set-process-sentinel", Fset_process_sentinel, Sset_process_sentinel, | |
805 | 2, 2, 0, | |
806 | "Give PROCESS the sentinel SENTINEL; nil for none.\n\ | |
807 | The sentinel is called as a function when the process changes state.\n\ | |
808 | It gets two arguments: the process, and a string describing the change.") | |
4ee3e309 EN |
809 | (process, sentinel) |
810 | register Lisp_Object process, sentinel; | |
d0d6b7c5 | 811 | { |
4ee3e309 EN |
812 | CHECK_PROCESS (process, 0); |
813 | XPROCESS (process)->sentinel = sentinel; | |
d0d6b7c5 JB |
814 | return sentinel; |
815 | } | |
816 | ||
817 | DEFUN ("process-sentinel", Fprocess_sentinel, Sprocess_sentinel, | |
818 | 1, 1, 0, | |
819 | "Return the sentinel of PROCESS; nil if none.\n\ | |
820 | See `set-process-sentinel' for more info on sentinels.") | |
4ee3e309 EN |
821 | (process) |
822 | register Lisp_Object process; | |
d0d6b7c5 | 823 | { |
4ee3e309 EN |
824 | CHECK_PROCESS (process, 0); |
825 | return XPROCESS (process)->sentinel; | |
d0d6b7c5 JB |
826 | } |
827 | ||
396df322 RS |
828 | DEFUN ("set-process-window-size", Fset_process_window_size, |
829 | Sset_process_window_size, 3, 3, 0, | |
830 | "Tell PROCESS that it has logical window size HEIGHT and WIDTH.") | |
4ee3e309 EN |
831 | (process, height, width) |
832 | register Lisp_Object process, height, width; | |
396df322 | 833 | { |
4ee3e309 | 834 | CHECK_PROCESS (process, 0); |
396df322 RS |
835 | CHECK_NATNUM (height, 0); |
836 | CHECK_NATNUM (width, 0); | |
4ee3e309 | 837 | if (set_window_size (XINT (XPROCESS (process)->infd), |
396df322 RS |
838 | XINT (height), XINT(width)) <= 0) |
839 | return Qnil; | |
840 | else | |
841 | return Qt; | |
842 | } | |
843 | ||
d0d6b7c5 JB |
844 | DEFUN ("process-kill-without-query", Fprocess_kill_without_query, |
845 | Sprocess_kill_without_query, 1, 2, 0, | |
846 | "Say no query needed if PROCESS is running when Emacs is exited.\n\ | |
f2d2dbfe | 847 | Optional second argument if non-nil says to require a query.\n\ |
d0d6b7c5 | 848 | Value is t if a query was formerly required.") |
4ee3e309 EN |
849 | (process, value) |
850 | register Lisp_Object process, value; | |
d0d6b7c5 JB |
851 | { |
852 | Lisp_Object tem; | |
853 | ||
4ee3e309 EN |
854 | CHECK_PROCESS (process, 0); |
855 | tem = XPROCESS (process)->kill_without_query; | |
856 | XPROCESS (process)->kill_without_query = Fnull (value); | |
d0d6b7c5 JB |
857 | |
858 | return Fnull (tem); | |
859 | } | |
312c9964 | 860 | |
de282a05 RS |
861 | DEFUN ("process-contact", Fprocess_contact, Sprocess_contact, |
862 | 1, 1, 0, | |
863 | "Return the contact info of PROCESS; t for a real child.\n\ | |
864 | For a net connection, the value is a cons cell of the form (HOST SERVICE).") | |
865 | (process) | |
866 | register Lisp_Object process; | |
867 | { | |
868 | CHECK_PROCESS (process, 0); | |
869 | return XPROCESS (process)->childp; | |
870 | } | |
871 | ||
312c9964 RS |
872 | #if 0 /* Turned off because we don't currently record this info |
873 | in the process. Perhaps add it. */ | |
874 | DEFUN ("process-connection", Fprocess_connection, Sprocess_connection, 1, 1, 0, | |
875 | "Return the connection type of `PROCESS'.\n\ | |
876 | The value is `nil' for a pipe,\n\ | |
877 | `t' or `pty' for a pty, or `stream' for a socket connection.") | |
878 | (process) | |
879 | Lisp_Object process; | |
880 | { | |
881 | return XPROCESS (process)->type; | |
882 | } | |
883 | #endif | |
d0d6b7c5 JB |
884 | \f |
885 | Lisp_Object | |
886 | list_processes_1 () | |
887 | { | |
888 | register Lisp_Object tail, tem; | |
889 | Lisp_Object proc, minspace, tem1; | |
890 | register struct buffer *old = current_buffer; | |
891 | register struct Lisp_Process *p; | |
892 | register int state; | |
893 | char tembuf[80]; | |
894 | ||
22719df2 | 895 | XSETFASTINT (minspace, 1); |
d0d6b7c5 JB |
896 | |
897 | set_buffer_internal (XBUFFER (Vstandard_output)); | |
898 | Fbuffer_disable_undo (Vstandard_output); | |
899 | ||
900 | current_buffer->truncate_lines = Qt; | |
901 | ||
902 | write_string ("\ | |
a9fde32e KH |
903 | Proc Status Buffer Tty Command\n\ |
904 | ---- ------ ------ --- -------\n", -1); | |
d0d6b7c5 JB |
905 | |
906 | for (tail = Vprocess_alist; !NILP (tail); tail = Fcdr (tail)) | |
907 | { | |
908 | Lisp_Object symbol; | |
909 | ||
910 | proc = Fcdr (Fcar (tail)); | |
911 | p = XPROCESS (proc); | |
912 | if (NILP (p->childp)) | |
913 | continue; | |
914 | ||
915 | Finsert (1, &p->name); | |
916 | Findent_to (make_number (13), minspace); | |
917 | ||
918 | if (!NILP (p->raw_status_low)) | |
919 | update_status (p); | |
920 | symbol = p->status; | |
bcd69aea | 921 | if (CONSP (p->status)) |
d0d6b7c5 JB |
922 | symbol = XCONS (p->status)->car; |
923 | ||
924 | ||
925 | if (EQ (symbol, Qsignal)) | |
926 | { | |
927 | Lisp_Object tem; | |
928 | tem = Fcar (Fcdr (p->status)); | |
929 | #ifdef VMS | |
930 | if (XINT (tem) < NSIG) | |
b0310da4 | 931 | write_string (sys_errlist [XINT (tem)], -1); |
d0d6b7c5 JB |
932 | else |
933 | #endif | |
934 | Fprinc (symbol, Qnil); | |
935 | } | |
936 | else if (NETCONN_P (proc)) | |
937 | { | |
938 | if (EQ (symbol, Qrun)) | |
939 | write_string ("open", -1); | |
940 | else if (EQ (symbol, Qexit)) | |
941 | write_string ("closed", -1); | |
942 | else | |
943 | Fprinc (symbol, Qnil); | |
944 | } | |
945 | else | |
946 | Fprinc (symbol, Qnil); | |
947 | ||
948 | if (EQ (symbol, Qexit)) | |
949 | { | |
950 | Lisp_Object tem; | |
951 | tem = Fcar (Fcdr (p->status)); | |
952 | if (XFASTINT (tem)) | |
953 | { | |
3162bafa | 954 | sprintf (tembuf, " %d", (int) XFASTINT (tem)); |
d0d6b7c5 JB |
955 | write_string (tembuf, -1); |
956 | } | |
957 | } | |
958 | ||
959 | if (EQ (symbol, Qsignal) || EQ (symbol, Qexit)) | |
960 | remove_process (proc); | |
961 | ||
962 | Findent_to (make_number (22), minspace); | |
963 | if (NILP (p->buffer)) | |
964 | insert_string ("(none)"); | |
965 | else if (NILP (XBUFFER (p->buffer)->name)) | |
966 | insert_string ("(Killed)"); | |
967 | else | |
968 | Finsert (1, &XBUFFER (p->buffer)->name); | |
969 | ||
970 | Findent_to (make_number (37), minspace); | |
971 | ||
a9fde32e KH |
972 | if (STRINGP (p->tty_name)) |
973 | Finsert (1, &p->tty_name); | |
974 | else | |
975 | insert_string ("(none)"); | |
976 | ||
977 | Findent_to (make_number (49), minspace); | |
978 | ||
d0d6b7c5 JB |
979 | if (NETCONN_P (proc)) |
980 | { | |
981 | sprintf (tembuf, "(network stream connection to %s)\n", | |
de282a05 | 982 | XSTRING (XCONS (p->childp)->car)->data); |
d0d6b7c5 JB |
983 | insert_string (tembuf); |
984 | } | |
985 | else | |
986 | { | |
987 | tem = p->command; | |
988 | while (1) | |
989 | { | |
990 | tem1 = Fcar (tem); | |
991 | Finsert (1, &tem1); | |
992 | tem = Fcdr (tem); | |
993 | if (NILP (tem)) | |
994 | break; | |
995 | insert_string (" "); | |
996 | } | |
997 | insert_string ("\n"); | |
998 | } | |
999 | } | |
1000 | return Qnil; | |
1001 | } | |
1002 | ||
1003 | DEFUN ("list-processes", Flist_processes, Slist_processes, 0, 0, "", | |
1004 | "Display a list of all processes.\n\ | |
1005 | \(Any processes listed as Exited or Signaled are actually eliminated\n\ | |
1006 | after the listing is made.)") | |
1007 | () | |
1008 | { | |
1009 | internal_with_output_to_temp_buffer ("*Process List*", | |
1010 | list_processes_1, Qnil); | |
1011 | return Qnil; | |
1012 | } | |
1013 | ||
1014 | DEFUN ("process-list", Fprocess_list, Sprocess_list, 0, 0, 0, | |
1015 | "Return a list of all processes.") | |
1016 | () | |
1017 | { | |
1018 | return Fmapcar (Qcdr, Vprocess_alist); | |
1019 | } | |
1020 | \f | |
b0310da4 JB |
1021 | /* Starting asynchronous inferior processes. */ |
1022 | ||
1023 | static Lisp_Object start_process_unwind (); | |
1024 | ||
d0d6b7c5 JB |
1025 | DEFUN ("start-process", Fstart_process, Sstart_process, 3, MANY, 0, |
1026 | "Start a program in a subprocess. Return the process object for it.\n\ | |
1027 | Args are NAME BUFFER PROGRAM &rest PROGRAM-ARGS\n\ | |
1028 | NAME is name for process. It is modified if necessary to make it unique.\n\ | |
1029 | BUFFER is the buffer or (buffer-name) to associate with the process.\n\ | |
1030 | Process output goes at end of that buffer, unless you specify\n\ | |
1031 | an output stream or filter function to handle the output.\n\ | |
1032 | BUFFER may be also nil, meaning that this process is not associated\n\ | |
0fa1789e | 1033 | with any buffer.\n\ |
d0d6b7c5 JB |
1034 | Third arg is program file name. It is searched for as in the shell.\n\ |
1035 | Remaining arguments are strings to give program as arguments.") | |
1036 | (nargs, args) | |
1037 | int nargs; | |
1038 | register Lisp_Object *args; | |
1039 | { | |
1e30af70 | 1040 | Lisp_Object buffer, name, program, proc, current_dir, tem; |
d0d6b7c5 JB |
1041 | #ifdef VMS |
1042 | register unsigned char *new_argv; | |
1043 | int len; | |
1044 | #else | |
1045 | register unsigned char **new_argv; | |
1046 | #endif | |
1047 | register int i; | |
b0310da4 | 1048 | int count = specpdl_ptr - specpdl; |
d0d6b7c5 JB |
1049 | |
1050 | buffer = args[1]; | |
1051 | if (!NILP (buffer)) | |
1052 | buffer = Fget_buffer_create (buffer); | |
1053 | ||
1e30af70 JB |
1054 | /* Make sure that the child will be able to chdir to the current |
1055 | buffer's current directory, or its unhandled equivalent. We | |
1056 | can't just have the child check for an error when it does the | |
1057 | chdir, since it's in a vfork. | |
1058 | ||
1059 | We have to GCPRO around this because Fexpand_file_name and | |
1060 | Funhandled_file_name_directory might call a file name handling | |
1061 | function. The argument list is protected by the caller, so all | |
1062 | we really have to worry about is buffer. */ | |
1063 | { | |
1064 | struct gcpro gcpro1, gcpro2; | |
1065 | ||
1066 | current_dir = current_buffer->directory; | |
1067 | ||
1068 | GCPRO2 (buffer, current_dir); | |
1069 | ||
7af71e17 RS |
1070 | current_dir |
1071 | = expand_and_dir_to_file (Funhandled_file_name_directory (current_dir), | |
1072 | Qnil); | |
1e30af70 JB |
1073 | if (NILP (Ffile_accessible_directory_p (current_dir))) |
1074 | report_file_error ("Setting current directory", | |
1075 | Fcons (current_buffer->directory, Qnil)); | |
1076 | ||
1077 | UNGCPRO; | |
1078 | } | |
1079 | ||
d0d6b7c5 JB |
1080 | name = args[0]; |
1081 | CHECK_STRING (name, 0); | |
1082 | ||
1083 | program = args[2]; | |
1084 | ||
1085 | CHECK_STRING (program, 2); | |
1086 | ||
1087 | #ifdef VMS | |
1088 | /* Make a one member argv with all args concatenated | |
1089 | together separated by a blank. */ | |
1090 | len = XSTRING (program)->size + 2; | |
1091 | for (i = 3; i < nargs; i++) | |
1092 | { | |
1093 | tem = args[i]; | |
1094 | CHECK_STRING (tem, i); | |
1095 | len += XSTRING (tem)->size + 1; /* count the blank */ | |
1096 | } | |
1097 | new_argv = (unsigned char *) alloca (len); | |
1098 | strcpy (new_argv, XSTRING (program)->data); | |
1099 | for (i = 3; i < nargs; i++) | |
1100 | { | |
1101 | tem = args[i]; | |
1102 | CHECK_STRING (tem, i); | |
1103 | strcat (new_argv, " "); | |
1104 | strcat (new_argv, XSTRING (tem)->data); | |
1105 | } | |
b0310da4 JB |
1106 | /* Need to add code here to check for program existence on VMS */ |
1107 | ||
d0d6b7c5 JB |
1108 | #else /* not VMS */ |
1109 | new_argv = (unsigned char **) alloca ((nargs - 1) * sizeof (char *)); | |
1110 | ||
d0d6b7c5 | 1111 | /* If program file name is not absolute, search our path for it */ |
e98d950b RS |
1112 | if (!IS_DIRECTORY_SEP (XSTRING (program)->data[0]) |
1113 | && !(XSTRING (program)->size > 1 | |
1114 | && IS_DEVICE_SEP (XSTRING (program)->data[1]))) | |
d0d6b7c5 | 1115 | { |
3b639868 KH |
1116 | struct gcpro gcpro1, gcpro2, gcpro3, gcpro4; |
1117 | ||
d0d6b7c5 | 1118 | tem = Qnil; |
3b639868 | 1119 | GCPRO4 (name, program, buffer, current_dir); |
5437e9f9 | 1120 | openp (Vexec_path, program, EXEC_SUFFIXES, &tem, 1); |
3b639868 | 1121 | UNGCPRO; |
d0d6b7c5 JB |
1122 | if (NILP (tem)) |
1123 | report_file_error ("Searching for program", Fcons (program, Qnil)); | |
f8a87498 | 1124 | tem = Fexpand_file_name (tem, Qnil); |
d0d6b7c5 JB |
1125 | new_argv[0] = XSTRING (tem)->data; |
1126 | } | |
3b639868 | 1127 | else |
13373f4e RS |
1128 | { |
1129 | if (!NILP (Ffile_directory_p (program))) | |
1130 | error ("Specified program for new process is a directory"); | |
1131 | ||
1132 | new_argv[0] = XSTRING (program)->data; | |
1133 | } | |
3b639868 KH |
1134 | |
1135 | for (i = 3; i < nargs; i++) | |
1136 | { | |
1137 | tem = args[i]; | |
1138 | CHECK_STRING (tem, i); | |
1139 | new_argv[i - 2] = XSTRING (tem)->data; | |
1140 | } | |
1141 | new_argv[i - 2] = 0; | |
d0d6b7c5 JB |
1142 | #endif /* not VMS */ |
1143 | ||
1144 | proc = make_process (name); | |
b0310da4 JB |
1145 | /* If an error occurs and we can't start the process, we want to |
1146 | remove it from the process list. This means that each error | |
1147 | check in create_process doesn't need to call remove_process | |
1148 | itself; it's all taken care of here. */ | |
1149 | record_unwind_protect (start_process_unwind, proc); | |
d0d6b7c5 JB |
1150 | |
1151 | XPROCESS (proc)->childp = Qt; | |
1152 | XPROCESS (proc)->command_channel_p = Qnil; | |
1153 | XPROCESS (proc)->buffer = buffer; | |
1154 | XPROCESS (proc)->sentinel = Qnil; | |
1155 | XPROCESS (proc)->filter = Qnil; | |
1156 | XPROCESS (proc)->command = Flist (nargs - 2, args + 2); | |
1157 | ||
7af71e17 RS |
1158 | /* Make the process marker point into the process buffer (if any). */ |
1159 | if (!NILP (buffer)) | |
1160 | Fset_marker (XPROCESS (proc)->mark, | |
1161 | make_number (BUF_ZV (XBUFFER (buffer))), buffer); | |
1162 | ||
c7580538 KH |
1163 | if (!NILP (buffer) && NILP (XBUFFER (buffer)->enable_multibyte_characters) |
1164 | || NILP (buffer) && NILP (buffer_defaults.enable_multibyte_characters)) | |
1165 | { | |
1166 | XPROCESS (proc)->decode_coding_system = Qnil; | |
1167 | XPROCESS (proc)->encode_coding_system = Qnil; | |
1168 | } | |
1169 | else | |
1170 | { | |
1171 | /* Setup coding systems for communicating with the process. */ | |
715f7577 | 1172 | /* Qt denotes we have not yet called Ffind_operation_coding_system. */ |
c7580538 KH |
1173 | Lisp_Object coding_systems = Qt; |
1174 | Lisp_Object val, *args2; | |
1175 | struct gcpro gcpro1; | |
0fa1789e | 1176 | |
11f84d7d KH |
1177 | if (!NILP (Vcoding_system_for_read)) |
1178 | val = Vcoding_system_for_read; | |
1179 | else if (NILP (current_buffer->enable_multibyte_characters)) | |
1180 | val = Qemacs_mule; | |
1181 | else | |
c7580538 KH |
1182 | { |
1183 | args2 = (Lisp_Object *) alloca ((nargs + 1) * sizeof *args2); | |
1184 | args2[0] = Qstart_process; | |
1185 | for (i = 0; i < nargs; i++) args2[i + 1] = args[i]; | |
1186 | GCPRO1 (proc); | |
715f7577 | 1187 | coding_systems = Ffind_operation_coding_system (nargs + 1, args2); |
c7580538 KH |
1188 | UNGCPRO; |
1189 | if (CONSP (coding_systems)) | |
1190 | val = XCONS (coding_systems)->car; | |
83502605 KH |
1191 | else if (CONSP (Vdefault_process_coding_system)) |
1192 | val = XCONS (Vdefault_process_coding_system)->car; | |
11f84d7d KH |
1193 | else |
1194 | val = Qnil; | |
c7580538 KH |
1195 | } |
1196 | XPROCESS (proc)->decode_coding_system = val; | |
0fa1789e | 1197 | |
11f84d7d KH |
1198 | if (!NILP (Vcoding_system_for_write)) |
1199 | val = Vcoding_system_for_write; | |
1200 | else if (NILP (current_buffer->enable_multibyte_characters)) | |
1201 | val = Qnil; | |
1202 | else | |
c7580538 KH |
1203 | { |
1204 | if (EQ (coding_systems, Qt)) | |
1205 | { | |
1206 | args2 = (Lisp_Object *) alloca ((nargs + 1) * sizeof args2); | |
1207 | args2[0] = Qstart_process; | |
1208 | for (i = 0; i < nargs; i++) args2[i + 1] = args[i]; | |
1209 | GCPRO1 (proc); | |
715f7577 KH |
1210 | coding_systems = |
1211 | Ffind_operation_coding_system (nargs + 1, args2); | |
c7580538 KH |
1212 | UNGCPRO; |
1213 | } | |
1214 | if (CONSP (coding_systems)) | |
1215 | val = XCONS (coding_systems)->cdr; | |
83502605 KH |
1216 | else if (CONSP (Vdefault_process_coding_system)) |
1217 | val = XCONS (Vdefault_process_coding_system)->cdr; | |
11f84d7d KH |
1218 | else |
1219 | val = Qnil; | |
c7580538 KH |
1220 | } |
1221 | XPROCESS (proc)->encode_coding_system = val; | |
1222 | } | |
0fa1789e KH |
1223 | |
1224 | XPROCESS (proc)->decoding_buf = make_uninit_string (0); | |
1225 | XPROCESS (proc)->encoding_buf = make_uninit_string (0); | |
1226 | ||
1e30af70 | 1227 | create_process (proc, new_argv, current_dir); |
d0d6b7c5 | 1228 | |
b0310da4 | 1229 | return unbind_to (count, proc); |
d0d6b7c5 JB |
1230 | } |
1231 | ||
b0310da4 | 1232 | /* This function is the unwind_protect form for Fstart_process. If |
8e6208c5 | 1233 | PROC doesn't have its pid set, then we know someone has signaled |
b0310da4 JB |
1234 | an error and the process wasn't started successfully, so we should |
1235 | remove it from the process list. */ | |
1236 | static Lisp_Object | |
1237 | start_process_unwind (proc) | |
1238 | Lisp_Object proc; | |
1239 | { | |
bcd69aea | 1240 | if (!PROCESSP (proc)) |
b0310da4 JB |
1241 | abort (); |
1242 | ||
1243 | /* Was PROC started successfully? */ | |
188d6c4e | 1244 | if (XINT (XPROCESS (proc)->pid) <= 0) |
b0310da4 JB |
1245 | remove_process (proc); |
1246 | ||
1247 | return Qnil; | |
1248 | } | |
1249 | ||
1250 | ||
d0d6b7c5 JB |
1251 | SIGTYPE |
1252 | create_process_1 (signo) | |
1253 | int signo; | |
1254 | { | |
3c0ee47b | 1255 | #if defined (USG) && !defined (POSIX_SIGNALS) |
d0d6b7c5 JB |
1256 | /* USG systems forget handlers when they are used; |
1257 | must reestablish each time */ | |
1258 | signal (signo, create_process_1); | |
1259 | #endif /* USG */ | |
1260 | } | |
1261 | ||
1262 | #if 0 /* This doesn't work; see the note before sigchld_handler. */ | |
1263 | #ifdef USG | |
1264 | #ifdef SIGCHLD | |
1265 | /* Mimic blocking of signals on system V, which doesn't really have it. */ | |
1266 | ||
1267 | /* Nonzero means we got a SIGCHLD when it was supposed to be blocked. */ | |
1268 | int sigchld_deferred; | |
1269 | ||
1270 | SIGTYPE | |
1271 | create_process_sigchld () | |
1272 | { | |
1273 | signal (SIGCHLD, create_process_sigchld); | |
1274 | ||
1275 | sigchld_deferred = 1; | |
1276 | } | |
1277 | #endif | |
1278 | #endif | |
1279 | #endif | |
1280 | ||
1281 | #ifndef VMS /* VMS version of this function is in vmsproc.c. */ | |
1e30af70 | 1282 | create_process (process, new_argv, current_dir) |
d0d6b7c5 JB |
1283 | Lisp_Object process; |
1284 | char **new_argv; | |
1e30af70 | 1285 | Lisp_Object current_dir; |
d0d6b7c5 | 1286 | { |
ecd1f654 | 1287 | int pid, inchannel, outchannel; |
d0d6b7c5 | 1288 | int sv[2]; |
0dc70c33 KH |
1289 | #ifdef POSIX_SIGNALS |
1290 | sigset_t procmask; | |
1291 | sigset_t blocked; | |
1292 | struct sigaction sigint_action; | |
1293 | struct sigaction sigquit_action; | |
1294 | #ifdef AIX | |
1295 | struct sigaction sighup_action; | |
1296 | #endif | |
1297 | #else /* !POSIX_SIGNALS */ | |
d0d6b7c5 JB |
1298 | #ifdef SIGCHLD |
1299 | SIGTYPE (*sigchld)(); | |
1300 | #endif | |
0dc70c33 | 1301 | #endif /* !POSIX_SIGNALS */ |
ecd1f654 KH |
1302 | /* Use volatile to protect variables from being clobbered by longjmp. */ |
1303 | volatile int forkin, forkout; | |
1304 | volatile int pty_flag = 0; | |
d0d6b7c5 JB |
1305 | extern char **environ; |
1306 | ||
d0d6b7c5 JB |
1307 | inchannel = outchannel = -1; |
1308 | ||
1309 | #ifdef HAVE_PTYS | |
fe45da4e | 1310 | if (!NILP (Vprocess_connection_type)) |
d0d6b7c5 JB |
1311 | outchannel = inchannel = allocate_pty (); |
1312 | ||
d0d6b7c5 JB |
1313 | if (inchannel >= 0) |
1314 | { | |
1315 | #ifndef USG | |
1316 | /* On USG systems it does not work to open the pty's tty here | |
1317 | and then close and reopen it in the child. */ | |
1318 | #ifdef O_NOCTTY | |
1319 | /* Don't let this terminal become our controlling terminal | |
1320 | (in case we don't have one). */ | |
1321 | forkout = forkin = open (pty_name, O_RDWR | O_NOCTTY, 0); | |
1322 | #else | |
1323 | forkout = forkin = open (pty_name, O_RDWR, 0); | |
1324 | #endif | |
1325 | if (forkin < 0) | |
1326 | report_file_error ("Opening pty", Qnil); | |
1327 | #else | |
1328 | forkin = forkout = -1; | |
1329 | #endif /* not USG */ | |
1330 | pty_flag = 1; | |
1331 | } | |
1332 | else | |
1333 | #endif /* HAVE_PTYS */ | |
1334 | #ifdef SKTPAIR | |
1335 | { | |
1336 | if (socketpair (AF_UNIX, SOCK_STREAM, 0, sv) < 0) | |
1337 | report_file_error ("Opening socketpair", Qnil); | |
1338 | outchannel = inchannel = sv[0]; | |
1339 | forkout = forkin = sv[1]; | |
1340 | } | |
1341 | #else /* not SKTPAIR */ | |
1342 | { | |
1343 | pipe (sv); | |
1344 | inchannel = sv[0]; | |
1345 | forkout = sv[1]; | |
1346 | pipe (sv); | |
1347 | outchannel = sv[1]; | |
1348 | forkin = sv[0]; | |
1349 | } | |
1350 | #endif /* not SKTPAIR */ | |
1351 | ||
1352 | #if 0 | |
1353 | /* Replaced by close_process_descs */ | |
1354 | set_exclusive_use (inchannel); | |
1355 | set_exclusive_use (outchannel); | |
1356 | #endif | |
1357 | ||
1358 | /* Stride people say it's a mystery why this is needed | |
1359 | as well as the O_NDELAY, but that it fails without this. */ | |
1360 | #if defined (STRIDE) || (defined (pfa) && defined (HAVE_PTYS)) | |
1361 | { | |
1362 | int one = 1; | |
1363 | ioctl (inchannel, FIONBIO, &one); | |
1364 | } | |
1365 | #endif | |
1366 | ||
1367 | #ifdef O_NONBLOCK | |
1368 | fcntl (inchannel, F_SETFL, O_NONBLOCK); | |
03832893 | 1369 | fcntl (outchannel, F_SETFL, O_NONBLOCK); |
d0d6b7c5 JB |
1370 | #else |
1371 | #ifdef O_NDELAY | |
1372 | fcntl (inchannel, F_SETFL, O_NDELAY); | |
03832893 | 1373 | fcntl (outchannel, F_SETFL, O_NDELAY); |
d0d6b7c5 JB |
1374 | #endif |
1375 | #endif | |
1376 | ||
1377 | /* Record this as an active process, with its channels. | |
1378 | As a result, child_setup will close Emacs's side of the pipes. */ | |
1379 | chan_process[inchannel] = process; | |
1d056e64 KH |
1380 | XSETINT (XPROCESS (process)->infd, inchannel); |
1381 | XSETINT (XPROCESS (process)->outfd, outchannel); | |
d0d6b7c5 JB |
1382 | /* Record the tty descriptor used in the subprocess. */ |
1383 | if (forkin < 0) | |
1384 | XPROCESS (process)->subtty = Qnil; | |
1385 | else | |
22719df2 | 1386 | XSETFASTINT (XPROCESS (process)->subtty, forkin); |
d0d6b7c5 JB |
1387 | XPROCESS (process)->pty_flag = (pty_flag ? Qt : Qnil); |
1388 | XPROCESS (process)->status = Qrun; | |
c7580538 KH |
1389 | if (!proc_decode_coding_system[inchannel]) |
1390 | proc_decode_coding_system[inchannel] | |
1391 | = (struct coding_system *) xmalloc (sizeof (struct coding_system)); | |
0fa1789e | 1392 | setup_coding_system (XPROCESS (process)->decode_coding_system, |
c7580538 KH |
1393 | proc_decode_coding_system[inchannel]); |
1394 | if (!proc_encode_coding_system[outchannel]) | |
1395 | proc_encode_coding_system[outchannel] | |
1396 | = (struct coding_system *) xmalloc (sizeof (struct coding_system)); | |
0fa1789e | 1397 | setup_coding_system (XPROCESS (process)->encode_coding_system, |
c7580538 | 1398 | proc_encode_coding_system[outchannel]); |
d0d6b7c5 JB |
1399 | |
1400 | /* Delay interrupts until we have a chance to store | |
1401 | the new fork's pid in its process structure */ | |
0dc70c33 KH |
1402 | #ifdef POSIX_SIGNALS |
1403 | sigemptyset (&blocked); | |
1404 | #ifdef SIGCHLD | |
1405 | sigaddset (&blocked, SIGCHLD); | |
1406 | #endif | |
1407 | #ifdef HAVE_VFORK | |
1408 | /* On many hosts (e.g. Solaris 2.4), if a vforked child calls `signal', | |
1409 | this sets the parent's signal handlers as well as the child's. | |
1410 | So delay all interrupts whose handlers the child might munge, | |
1411 | and record the current handlers so they can be restored later. */ | |
1412 | sigaddset (&blocked, SIGINT ); sigaction (SIGINT , 0, &sigint_action ); | |
1413 | sigaddset (&blocked, SIGQUIT); sigaction (SIGQUIT, 0, &sigquit_action); | |
1414 | #ifdef AIX | |
1415 | sigaddset (&blocked, SIGHUP ); sigaction (SIGHUP , 0, &sighup_action ); | |
1416 | #endif | |
1417 | #endif /* HAVE_VFORK */ | |
1418 | sigprocmask (SIG_BLOCK, &blocked, &procmask); | |
1419 | #else /* !POSIX_SIGNALS */ | |
d0d6b7c5 JB |
1420 | #ifdef SIGCHLD |
1421 | #ifdef BSD4_1 | |
1422 | sighold (SIGCHLD); | |
1423 | #else /* not BSD4_1 */ | |
6df54671 | 1424 | #if defined (BSD_SYSTEM) || defined (UNIPLUS) || defined (HPUX) |
d0d6b7c5 JB |
1425 | sigsetmask (sigmask (SIGCHLD)); |
1426 | #else /* ordinary USG */ | |
1427 | #if 0 | |
1428 | sigchld_deferred = 0; | |
1429 | sigchld = signal (SIGCHLD, create_process_sigchld); | |
1430 | #endif | |
1431 | #endif /* ordinary USG */ | |
1432 | #endif /* not BSD4_1 */ | |
1433 | #endif /* SIGCHLD */ | |
0dc70c33 | 1434 | #endif /* !POSIX_SIGNALS */ |
d0d6b7c5 | 1435 | |
3081bf8d | 1436 | FD_SET (inchannel, &input_wait_mask); |
a69281ff | 1437 | FD_SET (inchannel, &non_keyboard_wait_mask); |
3081bf8d KH |
1438 | if (inchannel > max_process_desc) |
1439 | max_process_desc = inchannel; | |
1440 | ||
d0d6b7c5 JB |
1441 | /* Until we store the proper pid, enable sigchld_handler |
1442 | to recognize an unknown pid as standing for this process. | |
1443 | It is very important not to let this `marker' value stay | |
1444 | in the table after this function has returned; if it does | |
1445 | it might cause call-process to hang and subsequent asynchronous | |
1446 | processes to get their return values scrambled. */ | |
1447 | XSETINT (XPROCESS (process)->pid, -1); | |
1448 | ||
ececcbec RS |
1449 | BLOCK_INPUT; |
1450 | ||
d0d6b7c5 JB |
1451 | { |
1452 | /* child_setup must clobber environ on systems with true vfork. | |
1453 | Protect it from permanent change. */ | |
1454 | char **save_environ = environ; | |
1455 | ||
e98d950b | 1456 | #ifndef WINDOWSNT |
d0d6b7c5 JB |
1457 | pid = vfork (); |
1458 | if (pid == 0) | |
e98d950b | 1459 | #endif /* not WINDOWSNT */ |
d0d6b7c5 JB |
1460 | { |
1461 | int xforkin = forkin; | |
1462 | int xforkout = forkout; | |
1463 | ||
1464 | #if 0 /* This was probably a mistake--it duplicates code later on, | |
1465 | but fails to handle all the cases. */ | |
1466 | /* Make sure SIGCHLD is not blocked in the child. */ | |
1467 | sigsetmask (SIGEMPTYMASK); | |
1468 | #endif | |
1469 | ||
1470 | /* Make the pty be the controlling terminal of the process. */ | |
1471 | #ifdef HAVE_PTYS | |
1472 | /* First, disconnect its current controlling terminal. */ | |
1473 | #ifdef HAVE_SETSID | |
7ce48618 RS |
1474 | /* We tried doing setsid only if pty_flag, but it caused |
1475 | process_set_signal to fail on SGI when using a pipe. */ | |
1476 | setsid (); | |
ce4c9c90 | 1477 | /* Make the pty's terminal the controlling terminal. */ |
084fd64a | 1478 | if (pty_flag) |
39e9ebcd | 1479 | { |
39e9ebcd RS |
1480 | #ifdef TIOCSCTTY |
1481 | /* We ignore the return value | |
1482 | because faith@cs.unc.edu says that is necessary on Linux. */ | |
1483 | ioctl (xforkin, TIOCSCTTY, 0); | |
ce4c9c90 | 1484 | #endif |
39e9ebcd | 1485 | } |
d0d6b7c5 | 1486 | #else /* not HAVE_SETSID */ |
c14e53a4 | 1487 | #ifdef USG |
000ab717 | 1488 | /* It's very important to call setpgrp here and no time |
d0d6b7c5 JB |
1489 | afterwards. Otherwise, we lose our controlling tty which |
1490 | is set when we open the pty. */ | |
1491 | setpgrp (); | |
1492 | #endif /* USG */ | |
1493 | #endif /* not HAVE_SETSID */ | |
9bcf8ec6 KH |
1494 | #if defined (HAVE_TERMIOS) && defined (LDISC1) |
1495 | if (pty_flag && xforkin >= 0) | |
1496 | { | |
1497 | struct termios t; | |
1498 | tcgetattr (xforkin, &t); | |
1499 | t.c_lflag = LDISC1; | |
1500 | if (tcsetattr (xforkin, TCSANOW, &t) < 0) | |
1501 | write (1, "create_process/tcsetattr LDISC1 failed\n", 39); | |
1502 | } | |
1503 | #else | |
aafadd9f | 1504 | #if defined (NTTYDISC) && defined (TIOCSETD) |
ff773a4e | 1505 | if (pty_flag && xforkin >= 0) |
afc549fd RS |
1506 | { |
1507 | /* Use new line discipline. */ | |
1508 | int ldisc = NTTYDISC; | |
4458f555 | 1509 | ioctl (xforkin, TIOCSETD, &ldisc); |
afc549fd | 1510 | } |
000ab717 | 1511 | #endif |
9bcf8ec6 | 1512 | #endif |
d0d6b7c5 JB |
1513 | #ifdef TIOCNOTTY |
1514 | /* In 4.3BSD, the TIOCSPGRP bug has been fixed, and now you | |
1515 | can do TIOCSPGRP only to the process's controlling tty. */ | |
1516 | if (pty_flag) | |
1517 | { | |
1518 | /* I wonder: would just ioctl (0, TIOCNOTTY, 0) work here? | |
1519 | I can't test it since I don't have 4.3. */ | |
1520 | int j = open ("/dev/tty", O_RDWR, 0); | |
1521 | ioctl (j, TIOCNOTTY, 0); | |
1522 | close (j); | |
5a570e37 | 1523 | #ifndef USG |
d0d6b7c5 JB |
1524 | /* In order to get a controlling terminal on some versions |
1525 | of BSD, it is necessary to put the process in pgrp 0 | |
1526 | before it opens the terminal. */ | |
99c1aeca | 1527 | #ifdef HAVE_SETPGID |
3ea1d291 RS |
1528 | setpgid (0, 0); |
1529 | #else | |
d0d6b7c5 | 1530 | setpgrp (0, 0); |
3ea1d291 | 1531 | #endif |
d0d6b7c5 JB |
1532 | #endif |
1533 | } | |
1534 | #endif /* TIOCNOTTY */ | |
1535 | ||
99153b9e | 1536 | #if !defined (RTU) && !defined (UNIPLUS) && !defined (DONT_REOPEN_PTY) |
d0d6b7c5 | 1537 | /*** There is a suggestion that this ought to be a |
99153b9e RS |
1538 | conditional on TIOCSPGRP, |
1539 | or !(defined (HAVE_SETSID) && defined (TIOCSCTTY)). | |
1540 | Trying the latter gave the wrong results on Debian GNU/Linux 1.1; | |
1541 | that system does seem to need this code, even though | |
1542 | both HAVE_SETSID and TIOCSCTTY are defined. */ | |
d0d6b7c5 JB |
1543 | /* Now close the pty (if we had it open) and reopen it. |
1544 | This makes the pty the controlling terminal of the subprocess. */ | |
1545 | if (pty_flag) | |
1546 | { | |
99e3d726 RS |
1547 | #ifdef SET_CHILD_PTY_PGRP |
1548 | int pgrp = getpid (); | |
1549 | #endif | |
1550 | ||
d0d6b7c5 JB |
1551 | /* I wonder if close (open (pty_name, ...)) would work? */ |
1552 | if (xforkin >= 0) | |
1553 | close (xforkin); | |
1554 | xforkout = xforkin = open (pty_name, O_RDWR, 0); | |
1555 | ||
4aa54ba8 RS |
1556 | if (xforkin < 0) |
1557 | { | |
1558 | write (1, "Couldn't open the pty terminal ", 31); | |
1559 | write (1, pty_name, strlen (pty_name)); | |
1560 | write (1, "\n", 1); | |
1561 | _exit (1); | |
1562 | } | |
1563 | ||
99e3d726 RS |
1564 | #ifdef SET_CHILD_PTY_PGRP |
1565 | ioctl (xforkin, TIOCSPGRP, &pgrp); | |
1566 | ioctl (xforkout, TIOCSPGRP, &pgrp); | |
1567 | #endif | |
d0d6b7c5 | 1568 | } |
99153b9e | 1569 | #endif /* not UNIPLUS and not RTU and not DONT_REOPEN_PTY */ |
e9bf058b | 1570 | |
d0d6b7c5 | 1571 | #ifdef SETUP_SLAVE_PTY |
13a72104 RS |
1572 | if (pty_flag) |
1573 | { | |
1574 | SETUP_SLAVE_PTY; | |
1575 | } | |
d0d6b7c5 JB |
1576 | #endif /* SETUP_SLAVE_PTY */ |
1577 | #ifdef AIX | |
1578 | /* On AIX, we've disabled SIGHUP above once we start a child on a pty. | |
1579 | Now reenable it in the child, so it will die when we want it to. */ | |
1580 | if (pty_flag) | |
1581 | signal (SIGHUP, SIG_DFL); | |
1582 | #endif | |
1583 | #endif /* HAVE_PTYS */ | |
1584 | ||
0dc70c33 KH |
1585 | signal (SIGINT, SIG_DFL); |
1586 | signal (SIGQUIT, SIG_DFL); | |
1587 | ||
1588 | /* Stop blocking signals in the child. */ | |
1589 | #ifdef POSIX_SIGNALS | |
1590 | sigprocmask (SIG_SETMASK, &procmask, 0); | |
1591 | #else /* !POSIX_SIGNALS */ | |
d0d6b7c5 JB |
1592 | #ifdef SIGCHLD |
1593 | #ifdef BSD4_1 | |
1594 | sigrelse (SIGCHLD); | |
1595 | #else /* not BSD4_1 */ | |
6df54671 | 1596 | #if defined (BSD_SYSTEM) || defined (UNIPLUS) || defined (HPUX) |
d0d6b7c5 JB |
1597 | sigsetmask (SIGEMPTYMASK); |
1598 | #else /* ordinary USG */ | |
63528b78 | 1599 | #if 0 |
d0d6b7c5 | 1600 | signal (SIGCHLD, sigchld); |
63528b78 | 1601 | #endif |
d0d6b7c5 JB |
1602 | #endif /* ordinary USG */ |
1603 | #endif /* not BSD4_1 */ | |
1604 | #endif /* SIGCHLD */ | |
0dc70c33 | 1605 | #endif /* !POSIX_SIGNALS */ |
5e7e1da2 | 1606 | |
ab01d0a8 RS |
1607 | if (pty_flag) |
1608 | child_setup_tty (xforkout); | |
e98d950b RS |
1609 | #ifdef WINDOWSNT |
1610 | pid = child_setup (xforkin, xforkout, xforkout, | |
1611 | new_argv, 1, current_dir); | |
1612 | #else /* not WINDOWSNT */ | |
d0d6b7c5 | 1613 | child_setup (xforkin, xforkout, xforkout, |
e065a56e | 1614 | new_argv, 1, current_dir); |
e98d950b | 1615 | #endif /* not WINDOWSNT */ |
d0d6b7c5 JB |
1616 | } |
1617 | environ = save_environ; | |
1618 | } | |
1619 | ||
ececcbec RS |
1620 | UNBLOCK_INPUT; |
1621 | ||
4a127b3b | 1622 | /* This runs in the Emacs process. */ |
d0d6b7c5 | 1623 | if (pid < 0) |
6311cf58 RS |
1624 | { |
1625 | if (forkin >= 0) | |
1626 | close (forkin); | |
1627 | if (forkin != forkout && forkout >= 0) | |
1628 | close (forkout); | |
6311cf58 | 1629 | } |
4a127b3b KH |
1630 | else |
1631 | { | |
1632 | /* vfork succeeded. */ | |
1633 | XSETFASTINT (XPROCESS (process)->pid, pid); | |
d0d6b7c5 | 1634 | |
e98d950b | 1635 | #ifdef WINDOWSNT |
4a127b3b | 1636 | register_child (pid, inchannel); |
e98d950b RS |
1637 | #endif /* WINDOWSNT */ |
1638 | ||
4a127b3b KH |
1639 | /* If the subfork execv fails, and it exits, |
1640 | this close hangs. I don't know why. | |
1641 | So have an interrupt jar it loose. */ | |
1642 | stop_polling (); | |
1643 | signal (SIGALRM, create_process_1); | |
1644 | alarm (1); | |
1645 | XPROCESS (process)->subtty = Qnil; | |
1646 | if (forkin >= 0) | |
1647 | close (forkin); | |
1648 | alarm (0); | |
1649 | start_polling (); | |
1650 | if (forkin != forkout && forkout >= 0) | |
1651 | close (forkout); | |
d0d6b7c5 | 1652 | |
875e6b94 | 1653 | #ifdef HAVE_PTYS |
4a127b3b KH |
1654 | if (pty_flag) |
1655 | XPROCESS (process)->tty_name = build_string (pty_name); | |
1656 | else | |
875e6b94 | 1657 | #endif |
4a127b3b KH |
1658 | XPROCESS (process)->tty_name = Qnil; |
1659 | } | |
3b9a3dfa | 1660 | |
4a127b3b KH |
1661 | /* Restore the signal state whether vfork succeeded or not. |
1662 | (We will signal an error, below, if it failed.) */ | |
0dc70c33 KH |
1663 | #ifdef POSIX_SIGNALS |
1664 | #ifdef HAVE_VFORK | |
1665 | /* Restore the parent's signal handlers. */ | |
1666 | sigaction (SIGINT, &sigint_action, 0); | |
1667 | sigaction (SIGQUIT, &sigquit_action, 0); | |
1668 | #ifdef AIX | |
1669 | sigaction (SIGHUP, &sighup_action, 0); | |
1670 | #endif | |
1671 | #endif /* HAVE_VFORK */ | |
1672 | /* Stop blocking signals in the parent. */ | |
1673 | sigprocmask (SIG_SETMASK, &procmask, 0); | |
1674 | #else /* !POSIX_SIGNALS */ | |
d0d6b7c5 JB |
1675 | #ifdef SIGCHLD |
1676 | #ifdef BSD4_1 | |
1677 | sigrelse (SIGCHLD); | |
1678 | #else /* not BSD4_1 */ | |
6df54671 | 1679 | #if defined (BSD_SYSTEM) || defined (UNIPLUS) || defined (HPUX) |
d0d6b7c5 JB |
1680 | sigsetmask (SIGEMPTYMASK); |
1681 | #else /* ordinary USG */ | |
1682 | #if 0 | |
1683 | signal (SIGCHLD, sigchld); | |
1684 | /* Now really handle any of these signals | |
1685 | that came in during this function. */ | |
1686 | if (sigchld_deferred) | |
1687 | kill (getpid (), SIGCHLD); | |
1688 | #endif | |
1689 | #endif /* ordinary USG */ | |
1690 | #endif /* not BSD4_1 */ | |
1691 | #endif /* SIGCHLD */ | |
0dc70c33 | 1692 | #endif /* !POSIX_SIGNALS */ |
4a127b3b KH |
1693 | |
1694 | /* Now generate the error if vfork failed. */ | |
1695 | if (pid < 0) | |
1696 | report_file_error ("Doing vfork", Qnil); | |
d0d6b7c5 JB |
1697 | } |
1698 | #endif /* not VMS */ | |
1699 | ||
1700 | #ifdef HAVE_SOCKETS | |
1701 | ||
1702 | /* open a TCP network connection to a given HOST/SERVICE. Treated | |
1703 | exactly like a normal process when reading and writing. Only | |
1704 | differences are in status display and process deletion. A network | |
1705 | connection has no PID; you cannot signal it. All you can do is | |
1706 | deactivate and close it via delete-process */ | |
1707 | ||
1708 | DEFUN ("open-network-stream", Fopen_network_stream, Sopen_network_stream, | |
1709 | 4, 4, 0, | |
1710 | "Open a TCP connection for a service to a host.\n\ | |
1711 | Returns a subprocess-object to represent the connection.\n\ | |
1712 | Input and output work as for subprocesses; `delete-process' closes it.\n\ | |
1713 | Args are NAME BUFFER HOST SERVICE.\n\ | |
1714 | NAME is name for process. It is modified if necessary to make it unique.\n\ | |
1715 | BUFFER is the buffer (or buffer-name) to associate with the process.\n\ | |
1716 | Process output goes at end of that buffer, unless you specify\n\ | |
1717 | an output stream or filter function to handle the output.\n\ | |
1718 | BUFFER may be also nil, meaning that this process is not associated\n\ | |
1719 | with any buffer\n\ | |
1720 | Third arg is name of the host to connect to, or its IP address.\n\ | |
1721 | Fourth arg SERVICE is name of the service desired, or an integer\n\ | |
1722 | specifying a port number to connect to.") | |
1723 | (name, buffer, host, service) | |
1724 | Lisp_Object name, buffer, host, service; | |
1725 | { | |
1726 | Lisp_Object proc; | |
1727 | register int i; | |
1728 | struct sockaddr_in address; | |
1729 | struct servent *svc_info; | |
1730 | struct hostent *host_info_ptr, host_info; | |
1731 | char *(addr_list[2]); | |
79967d5e | 1732 | IN_ADDR numeric_addr; |
d0d6b7c5 JB |
1733 | int s, outch, inch; |
1734 | char errstring[80]; | |
1735 | int port; | |
1736 | struct hostent host_info_fixed; | |
1737 | struct gcpro gcpro1, gcpro2, gcpro3, gcpro4; | |
e333e864 | 1738 | int retry = 0; |
44ade2e9 | 1739 | int count = specpdl_ptr - specpdl; |
d0d6b7c5 | 1740 | |
bff3ed0a RS |
1741 | #ifdef WINDOWSNT |
1742 | /* Ensure socket support is loaded if available. */ | |
1743 | init_winsock (TRUE); | |
1744 | #endif | |
1745 | ||
d0d6b7c5 JB |
1746 | GCPRO4 (name, buffer, host, service); |
1747 | CHECK_STRING (name, 0); | |
1748 | CHECK_STRING (host, 0); | |
bcd69aea | 1749 | if (INTEGERP (service)) |
d0d6b7c5 JB |
1750 | port = htons ((unsigned short) XINT (service)); |
1751 | else | |
1752 | { | |
1753 | CHECK_STRING (service, 0); | |
1754 | svc_info = getservbyname (XSTRING (service)->data, "tcp"); | |
1755 | if (svc_info == 0) | |
1756 | error ("Unknown service \"%s\"", XSTRING (service)->data); | |
1757 | port = svc_info->s_port; | |
1758 | } | |
1759 | ||
798b64bb KH |
1760 | /* Slow down polling to every ten seconds. |
1761 | Some kernels have a bug which causes retrying connect to fail | |
1762 | after a connect. Polling can interfere with gethostbyname too. */ | |
1763 | #ifdef POLL_FOR_INPUT | |
1764 | bind_polling_period (10); | |
1765 | #endif | |
1766 | ||
1d2c16fa | 1767 | #ifndef TERM |
616da37c RS |
1768 | while (1) |
1769 | { | |
5f0929a7 RS |
1770 | #ifdef TRY_AGAIN |
1771 | h_errno = 0; | |
1772 | #endif | |
5d6c2aa3 RS |
1773 | immediate_quit = 1; |
1774 | QUIT; | |
616da37c | 1775 | host_info_ptr = gethostbyname (XSTRING (host)->data); |
5d6c2aa3 | 1776 | immediate_quit = 0; |
616da37c RS |
1777 | #ifdef TRY_AGAIN |
1778 | if (! (host_info_ptr == 0 && h_errno == TRY_AGAIN)) | |
1779 | #endif | |
1780 | break; | |
1781 | Fsleep_for (make_number (1), Qnil); | |
1782 | } | |
d0d6b7c5 JB |
1783 | if (host_info_ptr == 0) |
1784 | /* Attempt to interpret host as numeric inet address */ | |
1785 | { | |
393a9679 | 1786 | numeric_addr = inet_addr ((char *) XSTRING (host)->data); |
79967d5e | 1787 | if (NUMERIC_ADDR_ERROR) |
d0d6b7c5 JB |
1788 | error ("Unknown host \"%s\"", XSTRING (host)->data); |
1789 | ||
1790 | host_info_ptr = &host_info; | |
1791 | host_info.h_name = 0; | |
1792 | host_info.h_aliases = 0; | |
1793 | host_info.h_addrtype = AF_INET; | |
39a21be6 JB |
1794 | #ifdef h_addr |
1795 | /* Older machines have only one address slot called h_addr. | |
1796 | Newer machines have h_addr_list, but #define h_addr to | |
1797 | be its first element. */ | |
1798 | host_info.h_addr_list = &(addr_list[0]); | |
1799 | #endif | |
1800 | host_info.h_addr = (char*)(&numeric_addr); | |
d0d6b7c5 | 1801 | addr_list[1] = 0; |
8777fbe2 RS |
1802 | /* numeric_addr isn't null-terminated; it has fixed length. */ |
1803 | host_info.h_length = sizeof (numeric_addr); | |
d0d6b7c5 JB |
1804 | } |
1805 | ||
1806 | bzero (&address, sizeof address); | |
1807 | bcopy (host_info_ptr->h_addr, (char *) &address.sin_addr, | |
1808 | host_info_ptr->h_length); | |
1809 | address.sin_family = host_info_ptr->h_addrtype; | |
1810 | address.sin_port = port; | |
1811 | ||
1812 | s = socket (host_info_ptr->h_addrtype, SOCK_STREAM, 0); | |
1813 | if (s < 0) | |
1814 | report_file_error ("error creating socket", Fcons (name, Qnil)); | |
1815 | ||
457a9bee RS |
1816 | /* Kernel bugs (on Ultrix at least) cause lossage (not just EINTR) |
1817 | when connect is interrupted. So let's not let it get interrupted. | |
1818 | Note we do not turn off polling, because polling is only used | |
1819 | when not interrupt_input, and thus not normally used on the systems | |
1820 | which have this bug. On systems which use polling, there's no way | |
1821 | to quit if polling is turned off. */ | |
1822 | if (interrupt_input) | |
1823 | unrequest_sigio (); | |
1824 | ||
d0d6b7c5 | 1825 | loop: |
0f2ee0c1 RS |
1826 | |
1827 | immediate_quit = 1; | |
1828 | QUIT; | |
1829 | ||
e333e864 RS |
1830 | if (connect (s, (struct sockaddr *) &address, sizeof address) == -1 |
1831 | && errno != EISCONN) | |
d0d6b7c5 JB |
1832 | { |
1833 | int xerrno = errno; | |
e333e864 | 1834 | |
0f2ee0c1 RS |
1835 | immediate_quit = 0; |
1836 | ||
d0d6b7c5 JB |
1837 | if (errno == EINTR) |
1838 | goto loop; | |
e333e864 RS |
1839 | if (errno == EADDRINUSE && retry < 20) |
1840 | { | |
4590788a RS |
1841 | /* A delay here is needed on some FreeBSD systems, |
1842 | and it is harmless, since this retrying takes time anyway | |
1843 | and should be infrequent. */ | |
1844 | Fsleep_for (make_number (1), Qnil); | |
e333e864 RS |
1845 | retry++; |
1846 | goto loop; | |
1847 | } | |
1848 | ||
d0d6b7c5 | 1849 | close (s); |
457a9bee RS |
1850 | |
1851 | if (interrupt_input) | |
1852 | request_sigio (); | |
1853 | ||
d0d6b7c5 JB |
1854 | errno = xerrno; |
1855 | report_file_error ("connection failed", | |
1856 | Fcons (host, Fcons (name, Qnil))); | |
1857 | } | |
457a9bee | 1858 | |
0f2ee0c1 RS |
1859 | immediate_quit = 0; |
1860 | ||
44ade2e9 RS |
1861 | #ifdef POLL_FOR_INPUT |
1862 | unbind_to (count, Qnil); | |
1863 | #endif | |
1864 | ||
457a9bee RS |
1865 | if (interrupt_input) |
1866 | request_sigio (); | |
1867 | ||
1d2c16fa RS |
1868 | #else /* TERM */ |
1869 | s = connect_server (0); | |
1870 | if (s < 0) | |
1871 | report_file_error ("error creating socket", Fcons (name, Qnil)); | |
1872 | send_command (s, C_PORT, 0, "%s:%d", XSTRING (host)->data, ntohs (port)); | |
1873 | send_command (s, C_DUMB, 1, 0); | |
1874 | #endif /* TERM */ | |
d0d6b7c5 JB |
1875 | |
1876 | inch = s; | |
59f23005 | 1877 | outch = s; |
d0d6b7c5 JB |
1878 | |
1879 | if (!NILP (buffer)) | |
1880 | buffer = Fget_buffer_create (buffer); | |
1881 | proc = make_process (name); | |
1882 | ||
1883 | chan_process[inch] = proc; | |
1884 | ||
1885 | #ifdef O_NONBLOCK | |
1886 | fcntl (inch, F_SETFL, O_NONBLOCK); | |
1887 | #else | |
1888 | #ifdef O_NDELAY | |
1889 | fcntl (inch, F_SETFL, O_NDELAY); | |
1890 | #endif | |
1891 | #endif | |
1892 | ||
de282a05 | 1893 | XPROCESS (proc)->childp = Fcons (host, Fcons (service, Qnil)); |
d0d6b7c5 JB |
1894 | XPROCESS (proc)->command_channel_p = Qnil; |
1895 | XPROCESS (proc)->buffer = buffer; | |
1896 | XPROCESS (proc)->sentinel = Qnil; | |
1897 | XPROCESS (proc)->filter = Qnil; | |
1898 | XPROCESS (proc)->command = Qnil; | |
1899 | XPROCESS (proc)->pid = Qnil; | |
7795ff9b | 1900 | XSETINT (XPROCESS (proc)->infd, inch); |
1d056e64 | 1901 | XSETINT (XPROCESS (proc)->outfd, outch); |
d0d6b7c5 JB |
1902 | XPROCESS (proc)->status = Qrun; |
1903 | FD_SET (inch, &input_wait_mask); | |
a69281ff | 1904 | FD_SET (inch, &non_keyboard_wait_mask); |
7d0e672e RS |
1905 | if (inch > max_process_desc) |
1906 | max_process_desc = inch; | |
d0d6b7c5 | 1907 | |
c7580538 KH |
1908 | if (!NILP (buffer) && NILP (XBUFFER (buffer)->enable_multibyte_characters) |
1909 | || NILP (buffer) && NILP (buffer_defaults.enable_multibyte_characters)) | |
1910 | { | |
1911 | XPROCESS (proc)->decode_coding_system = Qnil; | |
1912 | XPROCESS (proc)->encode_coding_system = Qnil; | |
1913 | } | |
1914 | else | |
1915 | { | |
1916 | /* Setup coding systems for communicating with the network stream. */ | |
1917 | struct gcpro gcpro1; | |
715f7577 | 1918 | /* Qt denotes we have not yet called Ffind_operation_coding_system. */ |
c7580538 KH |
1919 | Lisp_Object coding_systems = Qt; |
1920 | Lisp_Object args[5], val; | |
0fa1789e | 1921 | |
11f84d7d KH |
1922 | if (!NILP (Vcoding_system_for_read)) |
1923 | val = Vcoding_system_for_read; | |
1924 | else if (NILP (current_buffer->enable_multibyte_characters)) | |
1925 | /* We dare not decode end-of-line format by setting VAL to | |
1926 | Qemacs_mule, because the existing Emacs Lisp libraries | |
1927 | assume that they receive bare code including a sequene of | |
1928 | CR LF. */ | |
1929 | val = Qnil; | |
1930 | else | |
c7580538 KH |
1931 | { |
1932 | args[0] = Qopen_network_stream, args[1] = name, | |
1933 | args[2] = buffer, args[3] = host, args[4] = service; | |
1934 | GCPRO1 (proc); | |
715f7577 | 1935 | coding_systems = Ffind_operation_coding_system (5, args); |
c7580538 | 1936 | UNGCPRO; |
83502605 KH |
1937 | if (CONSP (coding_systems)) |
1938 | val = XCONS (coding_systems)->car; | |
1939 | else if (CONSP (Vdefault_process_coding_system)) | |
1940 | val = XCONS (Vdefault_process_coding_system)->car; | |
11f84d7d KH |
1941 | else |
1942 | val = Qnil; | |
c7580538 KH |
1943 | } |
1944 | XPROCESS (proc)->decode_coding_system = val; | |
0fa1789e | 1945 | |
11f84d7d KH |
1946 | if (!NILP (Vcoding_system_for_write)) |
1947 | val = Vcoding_system_for_write; | |
1948 | else if (NILP (current_buffer->enable_multibyte_characters)) | |
1949 | val = Qnil; | |
1950 | else | |
c7580538 KH |
1951 | { |
1952 | if (EQ (coding_systems, Qt)) | |
1953 | { | |
1954 | args[0] = Qopen_network_stream, args[1] = name, | |
1955 | args[2] = buffer, args[3] = host, args[4] = service; | |
1956 | GCPRO1 (proc); | |
715f7577 | 1957 | coding_systems = Ffind_operation_coding_system (5, args); |
c7580538 KH |
1958 | UNGCPRO; |
1959 | } | |
83502605 KH |
1960 | if (CONSP (coding_systems)) |
1961 | val = XCONS (coding_systems)->cdr; | |
1962 | else if (CONSP (Vdefault_process_coding_system)) | |
1963 | val = XCONS (Vdefault_process_coding_system)->cdr; | |
11f84d7d KH |
1964 | else |
1965 | val = Qnil; | |
c7580538 KH |
1966 | } |
1967 | XPROCESS (proc)->encode_coding_system = val; | |
1968 | } | |
0fa1789e | 1969 | |
c7580538 KH |
1970 | if (!proc_decode_coding_system[inch]) |
1971 | proc_decode_coding_system[inch] | |
1972 | = (struct coding_system *) xmalloc (sizeof (struct coding_system)); | |
0fa1789e | 1973 | setup_coding_system (XPROCESS (proc)->decode_coding_system, |
c7580538 KH |
1974 | proc_decode_coding_system[inch]); |
1975 | if (!proc_encode_coding_system[outch]) | |
1976 | proc_encode_coding_system[outch] | |
1977 | = (struct coding_system *) xmalloc (sizeof (struct coding_system)); | |
0fa1789e | 1978 | setup_coding_system (XPROCESS (proc)->encode_coding_system, |
c7580538 | 1979 | proc_encode_coding_system[outch]); |
0fa1789e KH |
1980 | |
1981 | XPROCESS (proc)->decoding_buf = make_uninit_string (0); | |
1982 | XPROCESS (proc)->encoding_buf = make_uninit_string (0); | |
1983 | ||
d0d6b7c5 JB |
1984 | UNGCPRO; |
1985 | return proc; | |
1986 | } | |
1987 | #endif /* HAVE_SOCKETS */ | |
1988 | ||
1989 | deactivate_process (proc) | |
1990 | Lisp_Object proc; | |
1991 | { | |
1992 | register int inchannel, outchannel; | |
1993 | register struct Lisp_Process *p = XPROCESS (proc); | |
1994 | ||
a9f2c884 RS |
1995 | inchannel = XINT (p->infd); |
1996 | outchannel = XINT (p->outfd); | |
d0d6b7c5 | 1997 | |
a9f2c884 | 1998 | if (inchannel >= 0) |
d0d6b7c5 JB |
1999 | { |
2000 | /* Beware SIGCHLD hereabouts. */ | |
2001 | flush_pending_output (inchannel); | |
2002 | #ifdef VMS | |
2003 | { | |
2004 | VMS_PROC_STUFF *get_vms_process_pointer (), *vs; | |
2005 | sys$dassgn (outchannel); | |
c6c6865d | 2006 | vs = get_vms_process_pointer (p->pid); |
d0d6b7c5 JB |
2007 | if (vs) |
2008 | give_back_vms_process_stuff (vs); | |
2009 | } | |
2010 | #else | |
2011 | close (inchannel); | |
a9f2c884 | 2012 | if (outchannel >= 0 && outchannel != inchannel) |
d0d6b7c5 JB |
2013 | close (outchannel); |
2014 | #endif | |
2015 | ||
1d056e64 KH |
2016 | XSETINT (p->infd, -1); |
2017 | XSETINT (p->outfd, -1); | |
d0d6b7c5 JB |
2018 | chan_process[inchannel] = Qnil; |
2019 | FD_CLR (inchannel, &input_wait_mask); | |
a69281ff | 2020 | FD_CLR (inchannel, &non_keyboard_wait_mask); |
7d0e672e RS |
2021 | if (inchannel == max_process_desc) |
2022 | { | |
2023 | int i; | |
2024 | /* We just closed the highest-numbered process input descriptor, | |
2025 | so recompute the highest-numbered one now. */ | |
2026 | max_process_desc = 0; | |
2027 | for (i = 0; i < MAXDESC; i++) | |
2028 | if (!NILP (chan_process[i])) | |
2029 | max_process_desc = i; | |
2030 | } | |
d0d6b7c5 JB |
2031 | } |
2032 | } | |
2033 | ||
2034 | /* Close all descriptors currently in use for communication | |
2035 | with subprocess. This is used in a newly-forked subprocess | |
2036 | to get rid of irrelevant descriptors. */ | |
2037 | ||
2038 | close_process_descs () | |
2039 | { | |
e98d950b | 2040 | #ifndef WINDOWSNT |
d0d6b7c5 JB |
2041 | int i; |
2042 | for (i = 0; i < MAXDESC; i++) | |
2043 | { | |
2044 | Lisp_Object process; | |
2045 | process = chan_process[i]; | |
2046 | if (!NILP (process)) | |
2047 | { | |
a9f2c884 RS |
2048 | int in = XINT (XPROCESS (process)->infd); |
2049 | int out = XINT (XPROCESS (process)->outfd); | |
2050 | if (in >= 0) | |
d0d6b7c5 | 2051 | close (in); |
a9f2c884 | 2052 | if (out >= 0 && in != out) |
d0d6b7c5 JB |
2053 | close (out); |
2054 | } | |
2055 | } | |
e98d950b | 2056 | #endif |
d0d6b7c5 JB |
2057 | } |
2058 | \f | |
2059 | DEFUN ("accept-process-output", Faccept_process_output, Saccept_process_output, | |
2060 | 0, 3, 0, | |
2061 | "Allow any pending output from subprocesses to be read by Emacs.\n\ | |
2062 | It is read into the process' buffers or given to their filter functions.\n\ | |
2063 | Non-nil arg PROCESS means do not return until some output has been received\n\ | |
2064 | from PROCESS.\n\ | |
2065 | Non-nil second arg TIMEOUT and third arg TIMEOUT-MSECS are number of\n\ | |
2066 | seconds and microseconds to wait; return after that much time whether\n\ | |
2067 | or not there is input.\n\ | |
2068 | Return non-nil iff we received any output before the timeout expired.") | |
4ee3e309 EN |
2069 | (process, timeout, timeout_msecs) |
2070 | register Lisp_Object process, timeout, timeout_msecs; | |
d0d6b7c5 JB |
2071 | { |
2072 | int seconds; | |
2073 | int useconds; | |
2074 | ||
2075 | if (! NILP (timeout_msecs)) | |
2076 | { | |
2077 | CHECK_NUMBER (timeout_msecs, 2); | |
2078 | useconds = XINT (timeout_msecs); | |
bcd69aea | 2079 | if (!INTEGERP (timeout)) |
1d056e64 | 2080 | XSETINT (timeout, 0); |
d0d6b7c5 JB |
2081 | |
2082 | { | |
2083 | int carry = useconds / 1000000; | |
2084 | ||
2085 | XSETINT (timeout, XINT (timeout) + carry); | |
2086 | useconds -= carry * 1000000; | |
2087 | ||
2088 | /* I think this clause is necessary because C doesn't | |
2089 | guarantee a particular rounding direction for negative | |
2090 | integers. */ | |
2091 | if (useconds < 0) | |
2092 | { | |
2093 | XSETINT (timeout, XINT (timeout) - 1); | |
2094 | useconds += 1000000; | |
2095 | } | |
2096 | } | |
2097 | } | |
de946e5a RS |
2098 | else |
2099 | useconds = 0; | |
d0d6b7c5 JB |
2100 | |
2101 | if (! NILP (timeout)) | |
2102 | { | |
2103 | CHECK_NUMBER (timeout, 1); | |
2104 | seconds = XINT (timeout); | |
ada9a4fd | 2105 | if (seconds < 0 || (seconds == 0 && useconds == 0)) |
d0d6b7c5 JB |
2106 | seconds = -1; |
2107 | } | |
2108 | else | |
2109 | { | |
4ee3e309 | 2110 | if (NILP (process)) |
d0d6b7c5 JB |
2111 | seconds = -1; |
2112 | else | |
2113 | seconds = 0; | |
2114 | } | |
2115 | ||
4ee3e309 EN |
2116 | if (NILP (process)) |
2117 | XSETFASTINT (process, 0); | |
f76475ad | 2118 | |
d0d6b7c5 | 2119 | return |
4ee3e309 | 2120 | (wait_reading_process_input (seconds, useconds, process, 0) |
d0d6b7c5 JB |
2121 | ? Qt : Qnil); |
2122 | } | |
2123 | ||
2124 | /* This variable is different from waiting_for_input in keyboard.c. | |
2125 | It is used to communicate to a lisp process-filter/sentinel (via the | |
2126 | function Fwaiting_for_user_input_p below) whether emacs was waiting | |
2127 | for user-input when that process-filter was called. | |
2128 | waiting_for_input cannot be used as that is by definition 0 when | |
d430ee71 RS |
2129 | lisp code is being evalled. |
2130 | This is also used in record_asynch_buffer_change. | |
2131 | For that purpose, this must be 0 | |
2132 | when not inside wait_reading_process_input. */ | |
d0d6b7c5 JB |
2133 | static int waiting_for_user_input_p; |
2134 | ||
c573ae8e RS |
2135 | /* This is here so breakpoints can be put on it. */ |
2136 | static | |
2137 | wait_reading_process_input_1 () | |
2138 | { | |
2139 | } | |
2140 | ||
d0d6b7c5 JB |
2141 | /* Read and dispose of subprocess output while waiting for timeout to |
2142 | elapse and/or keyboard input to be available. | |
2143 | ||
de6fd4b9 | 2144 | TIME_LIMIT is: |
d0d6b7c5 JB |
2145 | timeout in seconds, or |
2146 | zero for no limit, or | |
2147 | -1 means gobble data immediately available but don't wait for any. | |
2148 | ||
de6fd4b9 RS |
2149 | MICROSECS is: |
2150 | an additional duration to wait, measured in microseconds. | |
2151 | If this is nonzero and time_limit is 0, then the timeout | |
2152 | consists of MICROSECS only. | |
6e4f3667 | 2153 | |
de6fd4b9 | 2154 | READ_KBD is a lisp value: |
d0d6b7c5 JB |
2155 | 0 to ignore keyboard input, or |
2156 | 1 to return when input is available, or | |
84aa3ace | 2157 | -1 meaning caller will actually read the input, so don't throw to |
d0d6b7c5 | 2158 | the quit handler, or |
e6194ffc | 2159 | a cons cell, meaning wait until its car is non-nil |
de6fd4b9 | 2160 | (and gobble terminal input into the buffer if any arrives), or |
f76475ad JB |
2161 | a process object, meaning wait until something arrives from that |
2162 | process. The return value is true iff we read some input from | |
2163 | that process. | |
d0d6b7c5 | 2164 | |
de6fd4b9 | 2165 | DO_DISPLAY != 0 means redisplay should be done to show subprocess |
d0d6b7c5 JB |
2166 | output that arrives. |
2167 | ||
de6fd4b9 | 2168 | If READ_KBD is a pointer to a struct Lisp_Process, then the |
d0d6b7c5 JB |
2169 | function returns true iff we received input from that process |
2170 | before the timeout elapsed. | |
eb8c3be9 | 2171 | Otherwise, return true iff we received input from any process. */ |
d0d6b7c5 JB |
2172 | |
2173 | wait_reading_process_input (time_limit, microsecs, read_kbd, do_display) | |
f76475ad JB |
2174 | int time_limit, microsecs; |
2175 | Lisp_Object read_kbd; | |
2176 | int do_display; | |
d0d6b7c5 JB |
2177 | { |
2178 | register int channel, nfds, m; | |
2179 | static SELECT_TYPE Available; | |
2180 | int xerrno; | |
2181 | Lisp_Object proc; | |
2182 | EMACS_TIME timeout, end_time, garbage; | |
2183 | SELECT_TYPE Atemp; | |
a9f2c884 | 2184 | int wait_channel = -1; |
d0d6b7c5 JB |
2185 | struct Lisp_Process *wait_proc = 0; |
2186 | int got_some_input = 0; | |
84aa3ace | 2187 | Lisp_Object *wait_for_cell = 0; |
d0d6b7c5 JB |
2188 | |
2189 | FD_ZERO (&Available); | |
2190 | ||
f76475ad JB |
2191 | /* If read_kbd is a process to watch, set wait_proc and wait_channel |
2192 | accordingly. */ | |
bcd69aea | 2193 | if (PROCESSP (read_kbd)) |
d0d6b7c5 | 2194 | { |
f76475ad | 2195 | wait_proc = XPROCESS (read_kbd); |
a9f2c884 | 2196 | wait_channel = XINT (wait_proc->infd); |
22719df2 | 2197 | XSETFASTINT (read_kbd, 0); |
d0d6b7c5 JB |
2198 | } |
2199 | ||
84aa3ace | 2200 | /* If waiting for non-nil in a cell, record where. */ |
bcd69aea | 2201 | if (CONSP (read_kbd)) |
84aa3ace RS |
2202 | { |
2203 | wait_for_cell = &XCONS (read_kbd)->car; | |
22719df2 | 2204 | XSETFASTINT (read_kbd, 0); |
84aa3ace RS |
2205 | } |
2206 | ||
f76475ad | 2207 | waiting_for_user_input_p = XINT (read_kbd); |
d0d6b7c5 JB |
2208 | |
2209 | /* Since we may need to wait several times, | |
2210 | compute the absolute time to return at. */ | |
2211 | if (time_limit || microsecs) | |
2212 | { | |
2213 | EMACS_GET_TIME (end_time); | |
2214 | EMACS_SET_SECS_USECS (timeout, time_limit, microsecs); | |
2215 | EMACS_ADD_TIME (end_time, end_time, timeout); | |
2216 | } | |
e07d5449 KH |
2217 | #ifdef hpux |
2218 | /* AlainF 5-Jul-1996 | |
2219 | HP-UX 10.10 seem to have problems with signals coming in | |
2220 | Causes "poll: interrupted system call" messages when Emacs is run | |
2221 | in an X window | |
2222 | Turn off periodic alarms (in case they are in use) */ | |
2223 | stop_polling (); | |
2224 | #endif | |
d0d6b7c5 | 2225 | |
d0d6b7c5 JB |
2226 | while (1) |
2227 | { | |
c0239a0b RS |
2228 | int timeout_reduced_for_timers = 0; |
2229 | ||
d0d6b7c5 JB |
2230 | /* If calling from keyboard input, do not quit |
2231 | since we want to return C-g as an input character. | |
2232 | Otherwise, do pending quit if requested. */ | |
f76475ad | 2233 | if (XINT (read_kbd) >= 0) |
d0d6b7c5 JB |
2234 | QUIT; |
2235 | ||
889255b4 RS |
2236 | /* Exit now if the cell we're waiting for became non-nil. */ |
2237 | if (wait_for_cell && ! NILP (*wait_for_cell)) | |
2238 | break; | |
2239 | ||
d0d6b7c5 JB |
2240 | /* Compute time from now till when time limit is up */ |
2241 | /* Exit if already run out */ | |
2242 | if (time_limit == -1) | |
2243 | { | |
2244 | /* -1 specified for timeout means | |
2245 | gobble output available now | |
2246 | but don't wait at all. */ | |
2247 | ||
2248 | EMACS_SET_SECS_USECS (timeout, 0, 0); | |
2249 | } | |
2250 | else if (time_limit || microsecs) | |
2251 | { | |
2252 | EMACS_GET_TIME (timeout); | |
2253 | EMACS_SUB_TIME (timeout, end_time, timeout); | |
2254 | if (EMACS_TIME_NEG_P (timeout)) | |
2255 | break; | |
2256 | } | |
2257 | else | |
2258 | { | |
2259 | EMACS_SET_SECS_USECS (timeout, 100000, 0); | |
2260 | } | |
2261 | ||
f854a00b RS |
2262 | /* Normally we run timers here. |
2263 | But not if wait_for_cell; in those cases, | |
2264 | the wait is supposed to be short, | |
2265 | and those callers cannot handle running arbitrary Lisp code here. */ | |
2266 | if (! wait_for_cell) | |
fb4c3627 | 2267 | { |
c0239a0b | 2268 | EMACS_TIME timer_delay; |
c573ae8e RS |
2269 | int old_timers_run; |
2270 | ||
2271 | retry: | |
2272 | old_timers_run = timers_run; | |
c0239a0b | 2273 | timer_delay = timer_check (1); |
5de50bfb | 2274 | if (timers_run != old_timers_run && do_display) |
c573ae8e RS |
2275 | { |
2276 | redisplay_preserve_echo_area (); | |
2277 | /* We must retry, since a timer may have requeued itself | |
2278 | and that could alter the time_delay. */ | |
2279 | goto retry; | |
2280 | } | |
2281 | ||
69645afc RS |
2282 | /* If there is unread keyboard input, also return. */ |
2283 | if (XINT (read_kbd) != 0 | |
2284 | && requeued_events_pending_p ()) | |
2285 | break; | |
2286 | ||
c0239a0b | 2287 | if (! EMACS_TIME_NEG_P (timer_delay) && time_limit != -1) |
fb4c3627 RS |
2288 | { |
2289 | EMACS_TIME difference; | |
2290 | EMACS_SUB_TIME (difference, timer_delay, timeout); | |
2291 | if (EMACS_TIME_NEG_P (difference)) | |
c0239a0b RS |
2292 | { |
2293 | timeout = timer_delay; | |
2294 | timeout_reduced_for_timers = 1; | |
2295 | } | |
fb4c3627 | 2296 | } |
4abca5e7 RS |
2297 | /* If time_limit is -1, we are not going to wait at all. */ |
2298 | else if (time_limit != -1) | |
c573ae8e RS |
2299 | { |
2300 | /* This is so a breakpoint can be put here. */ | |
2301 | wait_reading_process_input_1 (); | |
2302 | } | |
fb4c3627 RS |
2303 | } |
2304 | ||
90ab1a81 JB |
2305 | /* Cause C-g and alarm signals to take immediate action, |
2306 | and cause input available signals to zero out timeout. | |
2307 | ||
2308 | It is important that we do this before checking for process | |
2309 | activity. If we get a SIGCHLD after the explicit checks for | |
2310 | process activity, timeout is the only way we will know. */ | |
2311 | if (XINT (read_kbd) < 0) | |
2312 | set_waiting_for_input (&timeout); | |
2313 | ||
6be429b1 JB |
2314 | /* If status of something has changed, and no input is |
2315 | available, notify the user of the change right away. After | |
2316 | this explicit check, we'll let the SIGCHLD handler zap | |
2317 | timeout to get our attention. */ | |
2318 | if (update_tick != process_tick && do_display) | |
2319 | { | |
2320 | Atemp = input_wait_mask; | |
2321 | EMACS_SET_SECS_USECS (timeout, 0, 0); | |
0c9960e9 RS |
2322 | if ((select (max (max_process_desc, max_keyboard_desc) + 1, |
2323 | &Atemp, (SELECT_TYPE *)0, (SELECT_TYPE *)0, | |
ecd1f654 KH |
2324 | &timeout) |
2325 | <= 0)) | |
90ab1a81 JB |
2326 | { |
2327 | /* It's okay for us to do this and then continue with | |
a0e4d3f3 | 2328 | the loop, since timeout has already been zeroed out. */ |
90ab1a81 JB |
2329 | clear_waiting_for_input (); |
2330 | status_notify (); | |
2331 | } | |
6be429b1 JB |
2332 | } |
2333 | ||
2334 | /* Don't wait for output from a non-running process. */ | |
2335 | if (wait_proc != 0 && !NILP (wait_proc->raw_status_low)) | |
2336 | update_status (wait_proc); | |
2337 | if (wait_proc != 0 | |
2338 | && ! EQ (wait_proc->status, Qrun)) | |
9aa2a7f4 | 2339 | { |
215b45e9 | 2340 | int nread, total_nread = 0; |
7ce63188 | 2341 | |
9aa2a7f4 | 2342 | clear_waiting_for_input (); |
7ce63188 RS |
2343 | XSETPROCESS (proc, wait_proc); |
2344 | ||
2345 | /* Read data from the process, until we exhaust it. */ | |
1c0707fd | 2346 | while (XINT (wait_proc->infd) >= 0 |
97a084c1 RS |
2347 | && (nread |
2348 | = read_process_output (proc, XINT (wait_proc->infd)))) | |
215b45e9 RS |
2349 | { |
2350 | if (0 < nread) | |
2351 | total_nread += nread; | |
2352 | #ifdef EIO | |
2353 | else if (nread == -1 && EIO == errno) | |
2354 | break; | |
2355 | #endif | |
2356 | } | |
7ce63188 RS |
2357 | if (total_nread > 0 && do_display) |
2358 | redisplay_preserve_echo_area (); | |
2359 | ||
9aa2a7f4 JB |
2360 | break; |
2361 | } | |
6be429b1 | 2362 | |
d0d6b7c5 JB |
2363 | /* Wait till there is something to do */ |
2364 | ||
b5dc1c83 RS |
2365 | if (wait_for_cell) |
2366 | Available = non_process_wait_mask; | |
2367 | else if (! XINT (read_kbd)) | |
a69281ff RS |
2368 | Available = non_keyboard_wait_mask; |
2369 | else | |
2370 | Available = input_wait_mask; | |
d0d6b7c5 | 2371 | |
ff11dfa1 | 2372 | /* If frame size has changed or the window is newly mapped, |
ffd56f97 JB |
2373 | redisplay now, before we start to wait. There is a race |
2374 | condition here; if a SIGIO arrives between now and the select | |
016899c0 JB |
2375 | and indicates that a frame is trashed, the select may block |
2376 | displaying a trashed screen. */ | |
5164ee8e | 2377 | if (frame_garbaged && do_display) |
7286affd RS |
2378 | { |
2379 | clear_waiting_for_input (); | |
2380 | redisplay_preserve_echo_area (); | |
2381 | if (XINT (read_kbd) < 0) | |
7efe788e | 2382 | set_waiting_for_input (&timeout); |
7286affd | 2383 | } |
ffd56f97 | 2384 | |
0a65b032 RS |
2385 | if (XINT (read_kbd) && detect_input_pending ()) |
2386 | { | |
2387 | nfds = 0; | |
2388 | FD_ZERO (&Available); | |
2389 | } | |
2390 | else | |
0c9960e9 RS |
2391 | nfds = select (max (max_process_desc, max_keyboard_desc) + 1, |
2392 | &Available, (SELECT_TYPE *)0, (SELECT_TYPE *)0, | |
0a65b032 | 2393 | &timeout); |
6720a7fb | 2394 | |
d0d6b7c5 JB |
2395 | xerrno = errno; |
2396 | ||
2397 | /* Make C-g and alarm signals set flags again */ | |
2398 | clear_waiting_for_input (); | |
2399 | ||
2400 | /* If we woke up due to SIGWINCH, actually change size now. */ | |
2401 | do_pending_window_change (); | |
2402 | ||
c0239a0b RS |
2403 | if (time_limit && nfds == 0 && ! timeout_reduced_for_timers) |
2404 | /* We wanted the full specified time, so return now. */ | |
d0d6b7c5 JB |
2405 | break; |
2406 | if (nfds < 0) | |
2407 | { | |
2408 | if (xerrno == EINTR) | |
2409 | FD_ZERO (&Available); | |
b0310da4 JB |
2410 | #ifdef ultrix |
2411 | /* Ultrix select seems to return ENOMEM when it is | |
2412 | interrupted. Treat it just like EINTR. Bleah. Note | |
2413 | that we want to test for the "ultrix" CPP symbol, not | |
2414 | "__ultrix__"; the latter is only defined under GCC, but | |
2415 | not by DEC's bundled CC. -JimB */ | |
8058415c JB |
2416 | else if (xerrno == ENOMEM) |
2417 | FD_ZERO (&Available); | |
2418 | #endif | |
d0d6b7c5 JB |
2419 | #ifdef ALLIANT |
2420 | /* This happens for no known reason on ALLIANT. | |
2421 | I am guessing that this is the right response. -- RMS. */ | |
2422 | else if (xerrno == EFAULT) | |
2423 | FD_ZERO (&Available); | |
2424 | #endif | |
2425 | else if (xerrno == EBADF) | |
2426 | { | |
2427 | #ifdef AIX | |
2428 | /* AIX doesn't handle PTY closure the same way BSD does. On AIX, | |
2429 | the child's closure of the pts gives the parent a SIGHUP, and | |
2430 | the ptc file descriptor is automatically closed, | |
2431 | yielding EBADF here or at select() call above. | |
2432 | So, SIGHUP is ignored (see def of PTY_TTY_NAME_SPRINTF | |
a0e4d3f3 | 2433 | in m/ibmrt-aix.h), and here we just ignore the select error. |
d0d6b7c5 | 2434 | Cleanup occurs c/o status_notify after SIGCLD. */ |
ffd56f97 | 2435 | FD_ZERO (&Available); /* Cannot depend on values returned */ |
d0d6b7c5 JB |
2436 | #else |
2437 | abort (); | |
2438 | #endif | |
2439 | } | |
2440 | else | |
6ed6233b | 2441 | error ("select error: %s", strerror (xerrno)); |
d0d6b7c5 | 2442 | } |
26ec91de | 2443 | #if defined(sun) && !defined(USG5_4) |
a69281ff | 2444 | else if (nfds > 0 && keyboard_bit_set (&Available) |
dd2281ae | 2445 | && interrupt_input) |
e0109153 JB |
2446 | /* System sometimes fails to deliver SIGIO. |
2447 | ||
2448 | David J. Mackenzie says that Emacs doesn't compile under | |
2449 | Solaris if this code is enabled, thus the USG5_4 in the CPP | |
2450 | conditional. "I haven't noticed any ill effects so far. | |
2451 | If you find a Solaris expert somewhere, they might know | |
2452 | better." */ | |
d0d6b7c5 JB |
2453 | kill (getpid (), SIGIO); |
2454 | #endif | |
2455 | ||
5d5beb62 RS |
2456 | #if 0 /* When polling is used, interrupt_input is 0, |
2457 | so get_input_pending should read the input. | |
2458 | So this should not be needed. */ | |
2459 | /* If we are using polling for input, | |
2460 | and we see input available, make it get read now. | |
2461 | Otherwise it might not actually get read for a second. | |
2462 | And on hpux, since we turn off polling in wait_reading_process_input, | |
2463 | it might never get read at all if we don't spend much time | |
2464 | outside of wait_reading_process_input. */ | |
2465 | if (XINT (read_kbd) && interrupt_input | |
2466 | && keyboard_bit_set (&Available) | |
2467 | && input_polling_used ()) | |
2468 | kill (getpid (), SIGALRM); | |
2469 | #endif | |
2470 | ||
d0d6b7c5 JB |
2471 | /* Check for keyboard input */ |
2472 | /* If there is any, return immediately | |
2473 | to give it higher priority than subprocesses */ | |
2474 | ||
77e1b3d4 | 2475 | if (XINT (read_kbd) != 0 |
5d6c2aa3 | 2476 | && detect_input_pending_run_timers (do_display)) |
6ed6233b KH |
2477 | { |
2478 | swallow_events (do_display); | |
5d6c2aa3 | 2479 | if (detect_input_pending_run_timers (do_display)) |
6ed6233b KH |
2480 | break; |
2481 | } | |
2482 | ||
69645afc RS |
2483 | /* If there is unread keyboard input, also return. */ |
2484 | if (XINT (read_kbd) != 0 | |
2485 | && requeued_events_pending_p ()) | |
2486 | break; | |
2487 | ||
77e1b3d4 RS |
2488 | /* If we are not checking for keyboard input now, |
2489 | do process events (but don't run any timers). | |
2490 | This is so that X events will be processed. | |
0c9960e9 | 2491 | Otherwise they may have to wait until polling takes place. |
77e1b3d4 RS |
2492 | That would causes delays in pasting selections, for example. |
2493 | ||
2494 | (We used to do this only if wait_for_cell.) */ | |
2495 | if (XINT (read_kbd) == 0 && detect_input_pending ()) | |
f854a00b RS |
2496 | { |
2497 | swallow_events (do_display); | |
0c9960e9 | 2498 | #if 0 /* Exiting when read_kbd doesn't request that seems wrong, though. */ |
f854a00b RS |
2499 | if (detect_input_pending ()) |
2500 | break; | |
5d5beb62 | 2501 | #endif |
0c9960e9 | 2502 | } |
f854a00b | 2503 | |
84aa3ace RS |
2504 | /* Exit now if the cell we're waiting for became non-nil. */ |
2505 | if (wait_for_cell && ! NILP (*wait_for_cell)) | |
2506 | break; | |
2507 | ||
4746118a | 2508 | #ifdef SIGIO |
5d5beb62 | 2509 | /* If we think we have keyboard input waiting, but didn't get SIGIO, |
d0d6b7c5 JB |
2510 | go read it. This can happen with X on BSD after logging out. |
2511 | In that case, there really is no input and no SIGIO, | |
2512 | but select says there is input. */ | |
2513 | ||
dd2281ae | 2514 | if (XINT (read_kbd) && interrupt_input |
5d5beb62 | 2515 | && keyboard_bit_set (&Available)) |
e643c5be | 2516 | kill (getpid (), SIGIO); |
4746118a | 2517 | #endif |
d0d6b7c5 | 2518 | |
d0d6b7c5 JB |
2519 | if (! wait_proc) |
2520 | got_some_input |= nfds > 0; | |
2521 | ||
32676c08 JB |
2522 | /* If checking input just got us a size-change event from X, |
2523 | obey it now if we should. */ | |
97f3b3d6 | 2524 | if (XINT (read_kbd) || wait_for_cell) |
32676c08 JB |
2525 | do_pending_window_change (); |
2526 | ||
a9f2c884 RS |
2527 | /* Check for data from a process. */ |
2528 | /* Really FIRST_PROC_DESC should be 0 on Unix, | |
2529 | but this is safer in the short run. */ | |
a69281ff | 2530 | for (channel = 0; channel <= max_process_desc; channel++) |
d0d6b7c5 | 2531 | { |
a69281ff RS |
2532 | if (FD_ISSET (channel, &Available) |
2533 | && FD_ISSET (channel, &non_keyboard_wait_mask)) | |
d0d6b7c5 JB |
2534 | { |
2535 | int nread; | |
2536 | ||
2537 | /* If waiting for this channel, arrange to return as | |
2538 | soon as no more input to be processed. No more | |
2539 | waiting. */ | |
2540 | if (wait_channel == channel) | |
2541 | { | |
a9f2c884 | 2542 | wait_channel = -1; |
d0d6b7c5 JB |
2543 | time_limit = -1; |
2544 | got_some_input = 1; | |
2545 | } | |
2546 | proc = chan_process[channel]; | |
2547 | if (NILP (proc)) | |
2548 | continue; | |
2549 | ||
d0d6b7c5 JB |
2550 | /* Read data from the process, starting with our |
2551 | buffered-ahead character if we have one. */ | |
2552 | ||
2553 | nread = read_process_output (proc, channel); | |
2554 | if (nread > 0) | |
2555 | { | |
2556 | /* Since read_process_output can run a filter, | |
2557 | which can call accept-process-output, | |
2558 | don't try to read from any other processes | |
2559 | before doing the select again. */ | |
2560 | FD_ZERO (&Available); | |
2561 | ||
2562 | if (do_display) | |
2563 | redisplay_preserve_echo_area (); | |
2564 | } | |
2565 | #ifdef EWOULDBLOCK | |
2566 | else if (nread == -1 && errno == EWOULDBLOCK) | |
2567 | ; | |
0b75e9a4 | 2568 | #endif |
89d7280d RS |
2569 | /* ISC 4.1 defines both EWOULDBLOCK and O_NONBLOCK, |
2570 | and Emacs uses O_NONBLOCK, so what we get is EAGAIN. */ | |
d0d6b7c5 JB |
2571 | #ifdef O_NONBLOCK |
2572 | else if (nread == -1 && errno == EAGAIN) | |
2573 | ; | |
2574 | #else | |
2575 | #ifdef O_NDELAY | |
2576 | else if (nread == -1 && errno == EAGAIN) | |
2577 | ; | |
2578 | /* Note that we cannot distinguish between no input | |
2579 | available now and a closed pipe. | |
2580 | With luck, a closed pipe will be accompanied by | |
2581 | subprocess termination and SIGCHLD. */ | |
2582 | else if (nread == 0 && !NETCONN_P (proc)) | |
2583 | ; | |
ffd56f97 JB |
2584 | #endif /* O_NDELAY */ |
2585 | #endif /* O_NONBLOCK */ | |
d0d6b7c5 JB |
2586 | #ifdef HAVE_PTYS |
2587 | /* On some OSs with ptys, when the process on one end of | |
2588 | a pty exits, the other end gets an error reading with | |
2589 | errno = EIO instead of getting an EOF (0 bytes read). | |
2590 | Therefore, if we get an error reading and errno = | |
2591 | EIO, just continue, because the child process has | |
2592 | exited and should clean itself up soon (e.g. when we | |
2593 | get a SIGCHLD). */ | |
2594 | else if (nread == -1 && errno == EIO) | |
2595 | ; | |
ffd56f97 JB |
2596 | #endif /* HAVE_PTYS */ |
2597 | /* If we can detect process termination, don't consider the process | |
2598 | gone just because its pipe is closed. */ | |
d0d6b7c5 JB |
2599 | #ifdef SIGCHLD |
2600 | else if (nread == 0 && !NETCONN_P (proc)) | |
2601 | ; | |
2602 | #endif | |
2603 | else | |
2604 | { | |
2605 | /* Preserve status of processes already terminated. */ | |
2606 | XSETINT (XPROCESS (proc)->tick, ++process_tick); | |
2607 | deactivate_process (proc); | |
2608 | if (!NILP (XPROCESS (proc)->raw_status_low)) | |
2609 | update_status (XPROCESS (proc)); | |
2610 | if (EQ (XPROCESS (proc)->status, Qrun)) | |
2611 | XPROCESS (proc)->status | |
2612 | = Fcons (Qexit, Fcons (make_number (256), Qnil)); | |
2613 | } | |
2614 | } | |
ffd56f97 JB |
2615 | } /* end for each file descriptor */ |
2616 | } /* end while exit conditions not met */ | |
d0d6b7c5 | 2617 | |
d430ee71 RS |
2618 | waiting_for_user_input_p = 0; |
2619 | ||
ffd56f97 JB |
2620 | /* If calling from keyboard input, do not quit |
2621 | since we want to return C-g as an input character. | |
2622 | Otherwise, do pending quit if requested. */ | |
f76475ad | 2623 | if (XINT (read_kbd) >= 0) |
ffd56f97 JB |
2624 | { |
2625 | /* Prevent input_pending from remaining set if we quit. */ | |
2626 | clear_input_pending (); | |
2627 | QUIT; | |
2628 | } | |
e07d5449 KH |
2629 | #ifdef hpux |
2630 | /* AlainF 5-Jul-1996 | |
2631 | HP-UX 10.10 seems to have problems with signals coming in | |
2632 | Causes "poll: interrupted system call" messages when Emacs is run | |
2633 | in an X window | |
2634 | Turn periodic alarms back on */ | |
5d5beb62 | 2635 | start_polling (); |
e07d5449 KH |
2636 | #endif |
2637 | ||
d0d6b7c5 JB |
2638 | return got_some_input; |
2639 | } | |
2640 | \f | |
3b9a3dfa RS |
2641 | /* Given a list (FUNCTION ARGS...), apply FUNCTION to the ARGS. */ |
2642 | ||
2643 | static Lisp_Object | |
2644 | read_process_output_call (fun_and_args) | |
2645 | Lisp_Object fun_and_args; | |
2646 | { | |
2647 | return apply1 (XCONS (fun_and_args)->car, XCONS (fun_and_args)->cdr); | |
2648 | } | |
2649 | ||
2650 | static Lisp_Object | |
2651 | read_process_output_error_handler (error) | |
2652 | Lisp_Object error; | |
2653 | { | |
2654 | cmd_error_internal (error, "error in process filter: "); | |
2655 | Vinhibit_quit = Qt; | |
2656 | update_echo_area (); | |
833ba342 | 2657 | Fsleep_for (make_number (2), Qnil); |
3b9a3dfa RS |
2658 | } |
2659 | ||
d0d6b7c5 JB |
2660 | /* Read pending output from the process channel, |
2661 | starting with our buffered-ahead character if we have one. | |
0fa1789e | 2662 | Yield number of decoded characters read. |
d0d6b7c5 JB |
2663 | |
2664 | This function reads at most 1024 characters. | |
2665 | If you want to read all available subprocess output, | |
0fa1789e KH |
2666 | you must call it repeatedly until it returns zero. |
2667 | ||
2668 | The characters read are decoded according to PROC's coding-system | |
2669 | for decoding. */ | |
d0d6b7c5 JB |
2670 | |
2671 | read_process_output (proc, channel) | |
2672 | Lisp_Object proc; | |
2673 | register int channel; | |
2674 | { | |
2675 | register int nchars; | |
d0d6b7c5 | 2676 | char *chars; |
0fa1789e KH |
2677 | #ifdef VMS |
2678 | int chars_allocated = 0; /* If 1, `chars' should be freed later. */ | |
d0d6b7c5 | 2679 | #else |
0fa1789e | 2680 | char buf[1024]; |
d0d6b7c5 JB |
2681 | #endif |
2682 | register Lisp_Object outstream; | |
2683 | register struct buffer *old = current_buffer; | |
2684 | register struct Lisp_Process *p = XPROCESS (proc); | |
2685 | register int opoint; | |
c7580538 | 2686 | struct coding_system *coding = proc_decode_coding_system[channel]; |
0fa1789e KH |
2687 | int chars_in_decoding_buf = 0; /* If 1, `chars' points |
2688 | XSTRING (p->decoding_buf)->data. */ | |
d0d6b7c5 JB |
2689 | |
2690 | #ifdef VMS | |
2691 | VMS_PROC_STUFF *vs, *get_vms_process_pointer(); | |
2692 | ||
2693 | vs = get_vms_process_pointer (p->pid); | |
2694 | if (vs) | |
2695 | { | |
2696 | if (!vs->iosb[0]) | |
2697 | return(0); /* Really weird if it does this */ | |
2698 | if (!(vs->iosb[0] & 1)) | |
2699 | return -1; /* I/O error */ | |
2700 | } | |
2701 | else | |
2702 | error ("Could not get VMS process pointer"); | |
2703 | chars = vs->inputBuffer; | |
2704 | nchars = clean_vms_buffer (chars, vs->iosb[1]); | |
2705 | if (nchars <= 0) | |
2706 | { | |
2707 | start_vms_process_read (vs); /* Crank up the next read on the process */ | |
2708 | return 1; /* Nothing worth printing, say we got 1 */ | |
2709 | } | |
0fa1789e KH |
2710 | if (coding->carryover_size) |
2711 | { | |
2712 | /* The data carried over in the previous decoding should be | |
2713 | prepended to the new data read to decode all together. */ | |
2714 | char *buf = (char *) xmalloc (nchars + coding->carryover_size); | |
2715 | ||
2716 | bcopy (coding->carryover, buf, coding->carryover_size); | |
2717 | bcopy (chars, buf + coding->carryover_size, nchars); | |
2718 | chars = buf; | |
2719 | chars_allocated = 1; | |
2720 | } | |
d0d6b7c5 JB |
2721 | #else /* not VMS */ |
2722 | ||
0fa1789e KH |
2723 | if (coding->carryover_size) |
2724 | /* The data carried over in the previous decoding should be | |
2725 | prepended to the new data read to decode all together. */ | |
2726 | bcopy (coding->carryover, buf, coding->carryover_size); | |
2727 | ||
d0d6b7c5 | 2728 | if (proc_buffered_char[channel] < 0) |
1bac7c84 RS |
2729 | nchars = read (channel, buf + coding->carryover_size, |
2730 | (sizeof buf) - coding->carryover_size); | |
d0d6b7c5 JB |
2731 | else |
2732 | { | |
0fa1789e | 2733 | buf[coding->carryover_size] = proc_buffered_char[channel]; |
d0d6b7c5 | 2734 | proc_buffered_char[channel] = -1; |
1bac7c84 RS |
2735 | nchars = read (channel, buf + coding->carryover_size + 1, |
2736 | (sizeof buf) - coding->carryover_size - 1); | |
d0d6b7c5 JB |
2737 | if (nchars < 0) |
2738 | nchars = 1; | |
2739 | else | |
2740 | nchars = nchars + 1; | |
2741 | } | |
0fa1789e | 2742 | chars = buf; |
d0d6b7c5 JB |
2743 | #endif /* not VMS */ |
2744 | ||
0fa1789e KH |
2745 | /* At this point, NCHARS holds number of characters just received |
2746 | (including the one in proc_buffered_char[channel]). */ | |
d0d6b7c5 JB |
2747 | if (nchars <= 0) return nchars; |
2748 | ||
0fa1789e KH |
2749 | /* Now set NCHARS how many bytes we must decode. */ |
2750 | nchars += coding->carryover_size; | |
2751 | ||
71a4b3e8 | 2752 | if (! CODING_REQUIRE_NO_CONVERSION (coding)) |
0fa1789e KH |
2753 | { |
2754 | int require = decoding_buffer_size (coding, nchars); | |
2755 | int consumed, produced; | |
2756 | ||
2757 | if (XSTRING (p->decoding_buf)->size < require) | |
2758 | p->decoding_buf = make_uninit_string (require); | |
2759 | produced = decode_coding (coding, chars, XSTRING (p->decoding_buf)->data, | |
2760 | nchars, XSTRING (p->decoding_buf)->size, | |
2761 | &consumed); | |
2762 | ||
2763 | /* New coding-system might be found by `decode_coding'. */ | |
2764 | if (!EQ (p->decode_coding_system, coding->symbol)) | |
2765 | { | |
2766 | p->decode_coding_system = coding->symbol; | |
77e1b3d4 RS |
2767 | |
2768 | /* Don't call setup_coding_system for | |
2769 | proc_decode_coding_system[channel] here. It is done in | |
2770 | detect_coding called via decode_coding above. */ | |
2771 | ||
0fa1789e KH |
2772 | /* If coding-system for encoding is not yet decided, we set it |
2773 | as the same as coding-system for decoding. */ | |
2774 | if (NILP (p->encode_coding_system)) | |
2775 | { | |
2776 | p->encode_coding_system = coding->symbol; | |
2777 | setup_coding_system (coding->symbol, | |
e9c509cd | 2778 | proc_encode_coding_system[p->outfd]); |
0fa1789e KH |
2779 | } |
2780 | } | |
2781 | #ifdef VMS | |
2782 | /* Now we don't need the contents of `chars'. */ | |
2783 | if (chars_allocated) | |
2784 | free (chars); | |
2785 | #endif | |
2786 | if (produced == 0) | |
2787 | return 0; | |
d7223684 | 2788 | chars = (char *) XSTRING (p->decoding_buf)->data; |
0fa1789e KH |
2789 | nchars = produced; |
2790 | chars_in_decoding_buf = 1; | |
2791 | } | |
2792 | #ifdef VMS | |
2793 | else if (chars_allocated) | |
2794 | { | |
2795 | /* Although we don't have to decode the received data, we must | |
2796 | move it to an area which we don't have to free. */ | |
2797 | if (! STRINGP (p->decoding_buf) | |
2798 | || XSTRING (p->decoding_buf)->size < nchars) | |
2799 | p->decoding_buf = make_uninit_string (nchars); | |
2800 | bcopy (chars, XSTRING (p->decoding_buf)->data, nchars); | |
2801 | free (chars); | |
2802 | chars = XSTRING (p->decoding_buf)->data; | |
2803 | chars_in_decoding_buf = 1; | |
2804 | } | |
2805 | #endif | |
2806 | ||
d0d6b7c5 JB |
2807 | outstream = p->filter; |
2808 | if (!NILP (outstream)) | |
2809 | { | |
2810 | /* We inhibit quit here instead of just catching it so that | |
2811 | hitting ^G when a filter happens to be running won't screw | |
2812 | it up. */ | |
2813 | int count = specpdl_ptr - specpdl; | |
30c78175 | 2814 | Lisp_Object odeactivate; |
dfc21838 | 2815 | Lisp_Object obuffer, okeymap; |
4da2f5be | 2816 | int outer_running_asynch_code = running_asynch_code; |
30c78175 | 2817 | |
dfc21838 RS |
2818 | /* No need to gcpro these, because all we do with them later |
2819 | is test them for EQness, and none of them should be a string. */ | |
30c78175 | 2820 | odeactivate = Vdeactivate_mark; |
dfc21838 RS |
2821 | XSETBUFFER (obuffer, current_buffer); |
2822 | okeymap = current_buffer->keymap; | |
30c78175 | 2823 | |
d0d6b7c5 | 2824 | specbind (Qinhibit_quit, Qt); |
6545aada | 2825 | specbind (Qlast_nonmenu_event, Qt); |
3b9a3dfa | 2826 | |
4da2f5be RS |
2827 | /* In case we get recursively called, |
2828 | and we already saved the match data nonrecursively, | |
2829 | save the same match data in safely recursive fashion. */ | |
2830 | if (outer_running_asynch_code) | |
2831 | { | |
2832 | Lisp_Object tem; | |
2833 | /* Don't clobber the CURRENT match data, either! */ | |
dd130227 | 2834 | tem = Fmatch_data (Qnil, Qnil); |
4da2f5be | 2835 | restore_match_data (); |
dd130227 | 2836 | record_unwind_protect (Fstore_match_data, Fmatch_data (Qnil, Qnil)); |
4da2f5be RS |
2837 | Fstore_match_data (tem); |
2838 | } | |
2839 | ||
2840 | /* For speed, if a search happens within this code, | |
2841 | save the match data in a special nonrecursive fashion. */ | |
7074fde6 | 2842 | running_asynch_code = 1; |
4da2f5be RS |
2843 | |
2844 | /* Read and dispose of the process output. */ | |
3b9a3dfa RS |
2845 | internal_condition_case_1 (read_process_output_call, |
2846 | Fcons (outstream, | |
2847 | Fcons (proc, | |
7074fde6 FP |
2848 | Fcons (make_string (chars, |
2849 | nchars), | |
3b9a3dfa RS |
2850 | Qnil))), |
2851 | !NILP (Vdebug_on_error) ? Qnil : Qerror, | |
2852 | read_process_output_error_handler); | |
4da2f5be RS |
2853 | |
2854 | /* If we saved the match data nonrecursively, restore it now. */ | |
7074fde6 | 2855 | restore_match_data (); |
4da2f5be | 2856 | running_asynch_code = outer_running_asynch_code; |
d0d6b7c5 | 2857 | |
592ce97f | 2858 | /* Handling the process output should not deactivate the mark. */ |
30c78175 RS |
2859 | Vdeactivate_mark = odeactivate; |
2860 | ||
7973cfa8 RS |
2861 | #if 0 /* Call record_asynch_buffer_change unconditionally, |
2862 | because we might have changed minor modes or other things | |
2863 | that affect key bindings. */ | |
dfc21838 RS |
2864 | if (! EQ (Fcurrent_buffer (), obuffer) |
2865 | || ! EQ (current_buffer->keymap, okeymap)) | |
7973cfa8 | 2866 | #endif |
927e08be RS |
2867 | /* But do it only if the caller is actually going to read events. |
2868 | Otherwise there's no need to make him wake up, and it could | |
2869 | cause trouble (for example it would make Fsit_for return). */ | |
2870 | if (waiting_for_user_input_p == -1) | |
2871 | record_asynch_buffer_change (); | |
d72534ba | 2872 | |
d0d6b7c5 JB |
2873 | #ifdef VMS |
2874 | start_vms_process_read (vs); | |
2875 | #endif | |
2ea6d561 | 2876 | unbind_to (count, Qnil); |
d0d6b7c5 JB |
2877 | return nchars; |
2878 | } | |
2879 | ||
2880 | /* If no filter, write into buffer if it isn't dead. */ | |
2881 | if (!NILP (p->buffer) && !NILP (XBUFFER (p->buffer)->name)) | |
2882 | { | |
b0310da4 | 2883 | Lisp_Object old_read_only; |
12ca5cdf | 2884 | int old_begv, old_zv; |
30c78175 | 2885 | Lisp_Object odeactivate; |
12ca5cdf | 2886 | int before; |
30c78175 RS |
2887 | |
2888 | odeactivate = Vdeactivate_mark; | |
d0d6b7c5 JB |
2889 | |
2890 | Fset_buffer (p->buffer); | |
6ec8bbd2 | 2891 | opoint = PT; |
b0310da4 | 2892 | old_read_only = current_buffer->read_only; |
12ca5cdf RS |
2893 | old_begv = BEGV; |
2894 | old_zv = ZV; | |
b0310da4 JB |
2895 | |
2896 | current_buffer->read_only = Qnil; | |
d0d6b7c5 JB |
2897 | |
2898 | /* Insert new output into buffer | |
2899 | at the current end-of-output marker, | |
2900 | thus preserving logical ordering of input and output. */ | |
2901 | if (XMARKER (p->mark)->buffer) | |
53aad33f | 2902 | SET_PT (clip_to_bounds (BEGV, marker_position (p->mark), ZV)); |
d0d6b7c5 JB |
2903 | else |
2904 | SET_PT (ZV); | |
12ca5cdf | 2905 | before = PT; |
b0310da4 JB |
2906 | |
2907 | /* If the output marker is outside of the visible region, save | |
2908 | the restriction and widen. */ | |
6ec8bbd2 | 2909 | if (! (BEGV <= PT && PT <= ZV)) |
b0310da4 JB |
2910 | Fwiden (); |
2911 | ||
d0d6b7c5 JB |
2912 | /* Insert before markers in case we are inserting where |
2913 | the buffer's mark is, and the user's next command is Meta-y. */ | |
0fa1789e KH |
2914 | if (chars_in_decoding_buf) |
2915 | insert_from_string_before_markers (p->decoding_buf, 0, nchars, 0); | |
2916 | else | |
2917 | insert_before_markers (chars, nchars); | |
6ec8bbd2 | 2918 | Fset_marker (p->mark, make_number (PT), p->buffer); |
b0310da4 | 2919 | |
d0d6b7c5 JB |
2920 | update_mode_lines++; |
2921 | ||
12ca5cdf RS |
2922 | /* Make sure opoint and the old restrictions |
2923 | float ahead of any new text just as point would. */ | |
2924 | if (opoint >= before) | |
2925 | opoint += PT - before; | |
2926 | if (old_begv > before) | |
2927 | old_begv += PT - before; | |
2928 | if (old_zv >= before) | |
2929 | old_zv += PT - before; | |
2930 | ||
b0310da4 | 2931 | /* If the restriction isn't what it should be, set it. */ |
12ca5cdf RS |
2932 | if (old_begv != BEGV || old_zv != ZV) |
2933 | Fnarrow_to_region (make_number (old_begv), make_number (old_zv)); | |
b0310da4 | 2934 | |
592ce97f | 2935 | /* Handling the process output should not deactivate the mark. */ |
30c78175 RS |
2936 | Vdeactivate_mark = odeactivate; |
2937 | ||
b0310da4 | 2938 | current_buffer->read_only = old_read_only; |
d0d6b7c5 JB |
2939 | SET_PT (opoint); |
2940 | set_buffer_internal (old); | |
2941 | } | |
2942 | #ifdef VMS | |
2943 | start_vms_process_read (vs); | |
2944 | #endif | |
2945 | return nchars; | |
2946 | } | |
2947 | ||
2948 | DEFUN ("waiting-for-user-input-p", Fwaiting_for_user_input_p, Swaiting_for_user_input_p, | |
2949 | 0, 0, 0, | |
8b4d685f | 2950 | "Returns non-nil if emacs is waiting for input from the user.\n\ |
d0d6b7c5 JB |
2951 | This is intended for use by asynchronous process output filters and sentinels.") |
2952 | () | |
2953 | { | |
8b4d685f | 2954 | return (waiting_for_user_input_p ? Qt : Qnil); |
d0d6b7c5 JB |
2955 | } |
2956 | \f | |
2957 | /* Sending data to subprocess */ | |
2958 | ||
2959 | jmp_buf send_process_frame; | |
2960 | ||
2961 | SIGTYPE | |
2962 | send_process_trap () | |
2963 | { | |
2964 | #ifdef BSD4_1 | |
2965 | sigrelse (SIGPIPE); | |
2966 | sigrelse (SIGALRM); | |
2967 | #endif /* BSD4_1 */ | |
2968 | longjmp (send_process_frame, 1); | |
2969 | } | |
2970 | ||
4556b700 RS |
2971 | /* Send some data to process PROC. |
2972 | BUF is the beginning of the data; LEN is the number of characters. | |
0fa1789e KH |
2973 | OBJECT is the Lisp object that the data comes from. |
2974 | ||
2975 | The data is encoded by PROC's coding-system for encoding before it | |
2976 | is sent. But if the data ends at the middle of multi-byte | |
2977 | representation, that incomplete sequence of bytes are sent without | |
2978 | being encoded. Should we store them in a buffer to prepend them to | |
2979 | the data send later? */ | |
4556b700 RS |
2980 | |
2981 | send_process (proc, buf, len, object) | |
ecd1f654 | 2982 | volatile Lisp_Object proc; |
b684d043 | 2983 | unsigned char *buf; |
d0d6b7c5 | 2984 | int len; |
4556b700 | 2985 | Lisp_Object object; |
d0d6b7c5 | 2986 | { |
ecd1f654 | 2987 | /* Use volatile to protect variables from being clobbered by longjmp. */ |
d0d6b7c5 | 2988 | int rv; |
ecd1f654 | 2989 | volatile unsigned char *procname = XSTRING (XPROCESS (proc)->name)->data; |
0fa1789e | 2990 | struct coding_system *coding; |
6044e593 RS |
2991 | struct gcpro gcpro1; |
2992 | ||
2993 | GCPRO1 (object); | |
d0d6b7c5 | 2994 | |
d0d6b7c5 JB |
2995 | #ifdef VMS |
2996 | struct Lisp_Process *p = XPROCESS (proc); | |
2997 | VMS_PROC_STUFF *vs, *get_vms_process_pointer(); | |
2998 | #endif /* VMS */ | |
2999 | ||
3000 | if (! NILP (XPROCESS (proc)->raw_status_low)) | |
3001 | update_status (XPROCESS (proc)); | |
3002 | if (! EQ (XPROCESS (proc)->status, Qrun)) | |
3003 | error ("Process %s not running", procname); | |
0fa1789e KH |
3004 | if (XINT (XPROCESS (proc)->outfd) < 0) |
3005 | error ("Output file descriptor of %s is closed", procname); | |
3006 | ||
c7580538 | 3007 | coding = proc_encode_coding_system[XINT (XPROCESS (proc)->outfd)]; |
71a4b3e8 | 3008 | if (! CODING_MAY_REQUIRE_NO_CONVERSION (coding)) |
0fa1789e KH |
3009 | { |
3010 | int require = encoding_buffer_size (coding, len); | |
3011 | int offset, dummy; | |
b684d043 | 3012 | unsigned char *temp_buf = NULL; |
0fa1789e KH |
3013 | |
3014 | /* Remember the offset of data because a string or a buffer may | |
3015 | be relocated. Setting OFFSET to -1 means we don't have to | |
3016 | care relocation. */ | |
3017 | offset = (BUFFERP (object) | |
b684d043 | 3018 | ? BUF_PTR_CHAR_POS (XBUFFER (object), buf) |
0fa1789e | 3019 | : (STRINGP (object) |
b684d043 | 3020 | ? offset = buf - XSTRING (object)->data |
0fa1789e KH |
3021 | : -1)); |
3022 | ||
3023 | if (coding->carryover_size > 0) | |
3024 | { | |
b684d043 | 3025 | temp_buf = (unsigned char *) xmalloc (len + coding->carryover_size); |
0fa1789e KH |
3026 | |
3027 | if (offset >= 0) | |
3028 | { | |
3029 | if (BUFFERP (object)) | |
b684d043 | 3030 | buf = BUF_CHAR_ADDRESS (XBUFFER (object), offset); |
0fa1789e | 3031 | else if (STRINGP (object)) |
b684d043 | 3032 | buf = offset + XSTRING (object)->data; |
0fa1789e KH |
3033 | /* Now we don't have to care relocation. */ |
3034 | offset = -1; | |
3035 | } | |
3036 | bcopy (coding->carryover, temp_buf, coding->carryover_size); | |
3037 | bcopy (buf, temp_buf + coding->carryover_size, len); | |
3038 | buf = temp_buf; | |
3039 | } | |
3040 | ||
3041 | if (XSTRING (XPROCESS (proc)->encoding_buf)->size < require) | |
3042 | { | |
3043 | XPROCESS (proc)->encoding_buf = make_uninit_string (require); | |
3044 | ||
3045 | if (offset >= 0) | |
3046 | { | |
3047 | if (BUFFERP (object)) | |
b684d043 | 3048 | buf = BUF_CHAR_ADDRESS (XBUFFER (object), offset); |
0fa1789e | 3049 | else if (STRINGP (object)) |
b684d043 | 3050 | buf = offset + XSTRING (object)->data; |
0fa1789e KH |
3051 | } |
3052 | } | |
3053 | object = XPROCESS (proc)->encoding_buf; | |
3054 | len = encode_coding (coding, buf, XSTRING (object)->data, | |
3055 | len, XSTRING (object)->size, &dummy); | |
3056 | buf = XSTRING (object)->data; | |
3057 | if (temp_buf) | |
3058 | xfree (temp_buf); | |
3059 | } | |
d0d6b7c5 JB |
3060 | |
3061 | #ifdef VMS | |
3062 | vs = get_vms_process_pointer (p->pid); | |
3063 | if (vs == 0) | |
3064 | error ("Could not find this process: %x", p->pid); | |
3065 | else if (write_to_vms_process (vs, buf, len)) | |
3066 | ; | |
3067 | #else | |
4556b700 RS |
3068 | |
3069 | if (pty_max_bytes == 0) | |
3070 | { | |
3071 | #if defined (HAVE_FPATHCONF) && defined (_PC_MAX_CANON) | |
3072 | pty_max_bytes = fpathconf (XFASTINT (XPROCESS (proc)->outfd), | |
3073 | _PC_MAX_CANON); | |
3074 | if (pty_max_bytes < 0) | |
3075 | pty_max_bytes = 250; | |
3076 | #else | |
3077 | pty_max_bytes = 250; | |
3078 | #endif | |
3079 | /* Deduct one, to leave space for the eof. */ | |
3080 | pty_max_bytes--; | |
3081 | } | |
3082 | ||
d0d6b7c5 JB |
3083 | if (!setjmp (send_process_frame)) |
3084 | while (len > 0) | |
3085 | { | |
3086 | int this = len; | |
4746118a | 3087 | SIGTYPE (*old_sigpipe)(); |
93b4f699 RS |
3088 | int flush_pty = 0; |
3089 | ||
4556b700 RS |
3090 | /* Decide how much data we can send in one batch. |
3091 | Long lines need to be split into multiple batches. */ | |
3092 | if (!NILP (XPROCESS (proc)->pty_flag)) | |
93b4f699 | 3093 | { |
4556b700 RS |
3094 | /* Starting this at zero is always correct when not the first iteration |
3095 | because the previous iteration ended by sending C-d. | |
3096 | It may not be correct for the first iteration | |
3097 | if a partial line was sent in a separate send_process call. | |
3098 | If that proves worth handling, we need to save linepos | |
3099 | in the process object. */ | |
3100 | int linepos = 0; | |
b684d043 RS |
3101 | unsigned char *ptr = buf; |
3102 | unsigned char *end = buf + len; | |
4556b700 RS |
3103 | |
3104 | /* Scan through this text for a line that is too long. */ | |
3105 | while (ptr != end && linepos < pty_max_bytes) | |
3106 | { | |
3107 | if (*ptr == '\n') | |
3108 | linepos = 0; | |
3109 | else | |
3110 | linepos++; | |
3111 | ptr++; | |
3112 | } | |
3113 | /* If we found one, break the line there | |
3114 | and put in a C-d to force the buffer through. */ | |
3115 | this = ptr - buf; | |
93b4f699 RS |
3116 | } |
3117 | ||
4556b700 RS |
3118 | /* Send this batch, using one or more write calls. */ |
3119 | while (this > 0) | |
d0d6b7c5 | 3120 | { |
4556b700 RS |
3121 | old_sigpipe = (SIGTYPE (*) ()) signal (SIGPIPE, send_process_trap); |
3122 | rv = write (XINT (XPROCESS (proc)->outfd), buf, this); | |
3123 | signal (SIGPIPE, old_sigpipe); | |
3124 | ||
3125 | if (rv < 0) | |
3126 | { | |
3127 | if (0 | |
d0d6b7c5 | 3128 | #ifdef EWOULDBLOCK |
4556b700 | 3129 | || errno == EWOULDBLOCK |
d0d6b7c5 JB |
3130 | #endif |
3131 | #ifdef EAGAIN | |
4556b700 | 3132 | || errno == EAGAIN |
d0d6b7c5 | 3133 | #endif |
4556b700 RS |
3134 | ) |
3135 | /* Buffer is full. Wait, accepting input; | |
3136 | that may allow the program | |
3137 | to finish doing output and read more. */ | |
3138 | { | |
3139 | Lisp_Object zero; | |
3140 | int offset; | |
3141 | ||
3142 | /* Running filters might relocate buffers or strings. | |
3143 | Arrange to relocate BUF. */ | |
3144 | if (BUFFERP (object)) | |
b684d043 | 3145 | offset = BUF_PTR_CHAR_POS (XBUFFER (object), buf); |
4556b700 | 3146 | else if (STRINGP (object)) |
b684d043 | 3147 | offset = buf - XSTRING (object)->data; |
4556b700 | 3148 | |
22719df2 | 3149 | XSETFASTINT (zero, 0); |
f3e6605c RS |
3150 | #ifdef EMACS_HAS_USECS |
3151 | wait_reading_process_input (0, 20000, zero, 0); | |
3152 | #else | |
4556b700 | 3153 | wait_reading_process_input (1, 0, zero, 0); |
f3e6605c | 3154 | #endif |
4556b700 RS |
3155 | |
3156 | if (BUFFERP (object)) | |
b684d043 | 3157 | buf = BUF_CHAR_ADDRESS (XBUFFER (object), offset); |
4556b700 | 3158 | else if (STRINGP (object)) |
b684d043 | 3159 | buf = offset + XSTRING (object)->data; |
4556b700 RS |
3160 | |
3161 | rv = 0; | |
3162 | } | |
3163 | else | |
3164 | /* This is a real error. */ | |
3165 | report_file_error ("writing to process", Fcons (proc, Qnil)); | |
d0d6b7c5 | 3166 | } |
4556b700 RS |
3167 | buf += rv; |
3168 | len -= rv; | |
3169 | this -= rv; | |
d0d6b7c5 | 3170 | } |
f76475ad | 3171 | |
4556b700 RS |
3172 | /* If we sent just part of the string, put in an EOF |
3173 | to force it through, before we send the rest. */ | |
3174 | if (len > 0) | |
3175 | Fprocess_send_eof (proc); | |
d0d6b7c5 JB |
3176 | } |
3177 | #endif | |
3178 | else | |
3179 | { | |
3180 | XPROCESS (proc)->raw_status_low = Qnil; | |
3181 | XPROCESS (proc)->raw_status_high = Qnil; | |
3182 | XPROCESS (proc)->status = Fcons (Qexit, Fcons (make_number (256), Qnil)); | |
3183 | XSETINT (XPROCESS (proc)->tick, ++process_tick); | |
3184 | deactivate_process (proc); | |
3185 | #ifdef VMS | |
3186 | error ("Error writing to process %s; closed it", procname); | |
3187 | #else | |
3188 | error ("SIGPIPE raised on process %s; closed it", procname); | |
3189 | #endif | |
3190 | } | |
6044e593 RS |
3191 | |
3192 | UNGCPRO; | |
d0d6b7c5 JB |
3193 | } |
3194 | ||
3195 | DEFUN ("process-send-region", Fprocess_send_region, Sprocess_send_region, | |
3196 | 3, 3, 0, | |
3197 | "Send current contents of region as input to PROCESS.\n\ | |
ebb9e16f JB |
3198 | PROCESS may be a process, a buffer, the name of a process or buffer, or\n\ |
3199 | nil, indicating the current buffer's process.\n\ | |
d0d6b7c5 JB |
3200 | Called from program, takes three arguments, PROCESS, START and END.\n\ |
3201 | If the region is more than 500 characters long,\n\ | |
3202 | it is sent in several bunches. This may happen even for shorter regions.\n\ | |
3203 | Output from processes can arrive in between bunches.") | |
3204 | (process, start, end) | |
3205 | Lisp_Object process, start, end; | |
3206 | { | |
3207 | Lisp_Object proc; | |
3208 | int start1; | |
3209 | ||
3210 | proc = get_process (process); | |
3211 | validate_region (&start, &end); | |
3212 | ||
3213 | if (XINT (start) < GPT && XINT (end) > GPT) | |
4da6dec8 | 3214 | move_gap (XINT (start)); |
d0d6b7c5 JB |
3215 | |
3216 | start1 = XINT (start); | |
0fa1789e | 3217 | send_process (proc, POS_ADDR (start1), XINT (end) - XINT (start), |
4556b700 | 3218 | Fcurrent_buffer ()); |
d0d6b7c5 JB |
3219 | |
3220 | return Qnil; | |
3221 | } | |
3222 | ||
3223 | DEFUN ("process-send-string", Fprocess_send_string, Sprocess_send_string, | |
3224 | 2, 2, 0, | |
3225 | "Send PROCESS the contents of STRING as input.\n\ | |
ebb9e16f JB |
3226 | PROCESS may be a process, a buffer, the name of a process or buffer, or\n\ |
3227 | nil, indicating the current buffer's process.\n\ | |
d0d6b7c5 JB |
3228 | If STRING is more than 500 characters long,\n\ |
3229 | it is sent in several bunches. This may happen even for shorter strings.\n\ | |
3230 | Output from processes can arrive in between bunches.") | |
3231 | (process, string) | |
3232 | Lisp_Object process, string; | |
3233 | { | |
3234 | Lisp_Object proc; | |
3235 | CHECK_STRING (string, 1); | |
3236 | proc = get_process (process); | |
4556b700 | 3237 | send_process (proc, XSTRING (string)->data, XSTRING (string)->size, string); |
d0d6b7c5 JB |
3238 | return Qnil; |
3239 | } | |
3240 | \f | |
3241 | /* send a signal number SIGNO to PROCESS. | |
3242 | CURRENT_GROUP means send to the process group that currently owns | |
3243 | the terminal being used to communicate with PROCESS. | |
3244 | This is used for various commands in shell mode. | |
3245 | If NOMSG is zero, insert signal-announcements into process's buffers | |
b0310da4 JB |
3246 | right away. |
3247 | ||
3248 | If we can, we try to signal PROCESS by sending control characters | |
e333e864 | 3249 | down the pty. This allows us to signal inferiors who have changed |
b0310da4 | 3250 | their uid, for which killpg would return an EPERM error. */ |
d0d6b7c5 | 3251 | |
f9738840 | 3252 | static void |
d0d6b7c5 JB |
3253 | process_send_signal (process, signo, current_group, nomsg) |
3254 | Lisp_Object process; | |
3255 | int signo; | |
3256 | Lisp_Object current_group; | |
3257 | int nomsg; | |
3258 | { | |
3259 | Lisp_Object proc; | |
3260 | register struct Lisp_Process *p; | |
3261 | int gid; | |
3262 | int no_pgrp = 0; | |
3263 | ||
3264 | proc = get_process (process); | |
3265 | p = XPROCESS (proc); | |
3266 | ||
3267 | if (!EQ (p->childp, Qt)) | |
3268 | error ("Process %s is not a subprocess", | |
3269 | XSTRING (p->name)->data); | |
a9f2c884 | 3270 | if (XINT (p->infd) < 0) |
d0d6b7c5 JB |
3271 | error ("Process %s is not active", |
3272 | XSTRING (p->name)->data); | |
3273 | ||
3274 | if (NILP (p->pty_flag)) | |
3275 | current_group = Qnil; | |
3276 | ||
d0d6b7c5 JB |
3277 | /* If we are using pgrps, get a pgrp number and make it negative. */ |
3278 | if (!NILP (current_group)) | |
3279 | { | |
b0310da4 | 3280 | #ifdef SIGNALS_VIA_CHARACTERS |
d0d6b7c5 JB |
3281 | /* If possible, send signals to the entire pgrp |
3282 | by sending an input character to it. */ | |
b0310da4 | 3283 | |
6be429b1 JB |
3284 | /* TERMIOS is the latest and bestest, and seems most likely to |
3285 | work. If the system has it, use it. */ | |
3286 | #ifdef HAVE_TERMIOS | |
3287 | struct termios t; | |
3288 | ||
3289 | switch (signo) | |
3290 | { | |
3291 | case SIGINT: | |
a9f2c884 | 3292 | tcgetattr (XINT (p->infd), &t); |
4556b700 | 3293 | send_process (proc, &t.c_cc[VINTR], 1, Qnil); |
a87b802f | 3294 | return; |
6be429b1 JB |
3295 | |
3296 | case SIGQUIT: | |
a9f2c884 | 3297 | tcgetattr (XINT (p->infd), &t); |
4556b700 | 3298 | send_process (proc, &t.c_cc[VQUIT], 1, Qnil); |
a87b802f | 3299 | return; |
6be429b1 JB |
3300 | |
3301 | case SIGTSTP: | |
a9f2c884 | 3302 | tcgetattr (XINT (p->infd), &t); |
d0adf46f | 3303 | #if defined (VSWTCH) && !defined (PREFER_VSUSP) |
4556b700 | 3304 | send_process (proc, &t.c_cc[VSWTCH], 1, Qnil); |
6be429b1 | 3305 | #else |
4556b700 | 3306 | send_process (proc, &t.c_cc[VSUSP], 1, Qnil); |
6be429b1 | 3307 | #endif |
a87b802f | 3308 | return; |
6be429b1 JB |
3309 | } |
3310 | ||
3311 | #else /* ! HAVE_TERMIOS */ | |
3312 | ||
b0310da4 JB |
3313 | /* On Berkeley descendants, the following IOCTL's retrieve the |
3314 | current control characters. */ | |
d0d6b7c5 | 3315 | #if defined (TIOCGLTC) && defined (TIOCGETC) |
b0310da4 | 3316 | |
d0d6b7c5 JB |
3317 | struct tchars c; |
3318 | struct ltchars lc; | |
3319 | ||
3320 | switch (signo) | |
3321 | { | |
3322 | case SIGINT: | |
a9f2c884 | 3323 | ioctl (XINT (p->infd), TIOCGETC, &c); |
4556b700 | 3324 | send_process (proc, &c.t_intrc, 1, Qnil); |
f9738840 | 3325 | return; |
d0d6b7c5 | 3326 | case SIGQUIT: |
a9f2c884 | 3327 | ioctl (XINT (p->infd), TIOCGETC, &c); |
4556b700 | 3328 | send_process (proc, &c.t_quitc, 1, Qnil); |
f9738840 | 3329 | return; |
0ad77c54 | 3330 | #ifdef SIGTSTP |
d0d6b7c5 | 3331 | case SIGTSTP: |
a9f2c884 | 3332 | ioctl (XINT (p->infd), TIOCGLTC, &lc); |
4556b700 | 3333 | send_process (proc, &lc.t_suspc, 1, Qnil); |
f9738840 | 3334 | return; |
b0310da4 | 3335 | #endif /* ! defined (SIGTSTP) */ |
d0d6b7c5 | 3336 | } |
b0310da4 JB |
3337 | |
3338 | #else /* ! defined (TIOCGLTC) && defined (TIOCGETC) */ | |
3339 | ||
3340 | /* On SYSV descendants, the TCGETA ioctl retrieves the current control | |
3341 | characters. */ | |
3342 | #ifdef TCGETA | |
d0d6b7c5 JB |
3343 | struct termio t; |
3344 | switch (signo) | |
3345 | { | |
3346 | case SIGINT: | |
a9f2c884 | 3347 | ioctl (XINT (p->infd), TCGETA, &t); |
4556b700 | 3348 | send_process (proc, &t.c_cc[VINTR], 1, Qnil); |
f9738840 | 3349 | return; |
d0d6b7c5 | 3350 | case SIGQUIT: |
a9f2c884 | 3351 | ioctl (XINT (p->infd), TCGETA, &t); |
4556b700 | 3352 | send_process (proc, &t.c_cc[VQUIT], 1, Qnil); |
f9738840 | 3353 | return; |
7d79e3b4 | 3354 | #ifdef SIGTSTP |
d0d6b7c5 | 3355 | case SIGTSTP: |
a9f2c884 | 3356 | ioctl (XINT (p->infd), TCGETA, &t); |
4556b700 | 3357 | send_process (proc, &t.c_cc[VSWTCH], 1, Qnil); |
f9738840 | 3358 | return; |
b0310da4 | 3359 | #endif /* ! defined (SIGTSTP) */ |
d0d6b7c5 | 3360 | } |
b0310da4 JB |
3361 | #else /* ! defined (TCGETA) */ |
3362 | Your configuration files are messed up. | |
3363 | /* If your system configuration files define SIGNALS_VIA_CHARACTERS, | |
3364 | you'd better be using one of the alternatives above! */ | |
3365 | #endif /* ! defined (TCGETA) */ | |
3366 | #endif /* ! defined (TIOCGLTC) && defined (TIOCGETC) */ | |
6be429b1 | 3367 | #endif /* ! defined HAVE_TERMIOS */ |
b0310da4 | 3368 | #endif /* ! defined (SIGNALS_VIA_CHARACTERS) */ |
d0d6b7c5 | 3369 | |
301c3fe4 | 3370 | #ifdef TIOCGPGRP |
d0d6b7c5 JB |
3371 | /* Get the pgrp using the tty itself, if we have that. |
3372 | Otherwise, use the pty to get the pgrp. | |
3373 | On pfa systems, saka@pfu.fujitsu.co.JP writes: | |
b0310da4 JB |
3374 | "TIOCGPGRP symbol defined in sys/ioctl.h at E50. |
3375 | But, TIOCGPGRP does not work on E50 ;-P works fine on E60" | |
d0d6b7c5 JB |
3376 | His patch indicates that if TIOCGPGRP returns an error, then |
3377 | we should just assume that p->pid is also the process group id. */ | |
3378 | { | |
3379 | int err; | |
3380 | ||
3381 | if (!NILP (p->subtty)) | |
3382 | err = ioctl (XFASTINT (p->subtty), TIOCGPGRP, &gid); | |
3383 | else | |
a9f2c884 | 3384 | err = ioctl (XINT (p->infd), TIOCGPGRP, &gid); |
d0d6b7c5 JB |
3385 | |
3386 | #ifdef pfa | |
3387 | if (err == -1) | |
3388 | gid = - XFASTINT (p->pid); | |
301c3fe4 | 3389 | #endif /* ! defined (pfa) */ |
d0d6b7c5 JB |
3390 | } |
3391 | if (gid == -1) | |
3392 | no_pgrp = 1; | |
3393 | else | |
3394 | gid = - gid; | |
b0310da4 | 3395 | #else /* ! defined (TIOCGPGRP ) */ |
301c3fe4 JB |
3396 | /* Can't select pgrps on this system, so we know that |
3397 | the child itself heads the pgrp. */ | |
3398 | gid = - XFASTINT (p->pid); | |
3399 | #endif /* ! defined (TIOCGPGRP ) */ | |
d0d6b7c5 JB |
3400 | } |
3401 | else | |
3402 | gid = - XFASTINT (p->pid); | |
d0d6b7c5 JB |
3403 | |
3404 | switch (signo) | |
3405 | { | |
3406 | #ifdef SIGCONT | |
3407 | case SIGCONT: | |
3408 | p->raw_status_low = Qnil; | |
3409 | p->raw_status_high = Qnil; | |
3410 | p->status = Qrun; | |
3411 | XSETINT (p->tick, ++process_tick); | |
3412 | if (!nomsg) | |
3413 | status_notify (); | |
3414 | break; | |
301c3fe4 | 3415 | #endif /* ! defined (SIGCONT) */ |
d0d6b7c5 JB |
3416 | case SIGINT: |
3417 | #ifdef VMS | |
4556b700 | 3418 | send_process (proc, "\003", 1, Qnil); /* ^C */ |
d0d6b7c5 JB |
3419 | goto whoosh; |
3420 | #endif | |
3421 | case SIGQUIT: | |
3422 | #ifdef VMS | |
4556b700 | 3423 | send_process (proc, "\031", 1, Qnil); /* ^Y */ |
d0d6b7c5 JB |
3424 | goto whoosh; |
3425 | #endif | |
3426 | case SIGKILL: | |
3427 | #ifdef VMS | |
3428 | sys$forcex (&(XFASTINT (p->pid)), 0, 1); | |
3429 | whoosh: | |
3430 | #endif | |
a9f2c884 | 3431 | flush_pending_output (XINT (p->infd)); |
d0d6b7c5 JB |
3432 | break; |
3433 | } | |
3434 | ||
3435 | /* If we don't have process groups, send the signal to the immediate | |
3436 | subprocess. That isn't really right, but it's better than any | |
3437 | obvious alternative. */ | |
3438 | if (no_pgrp) | |
3439 | { | |
3440 | kill (XFASTINT (p->pid), signo); | |
3441 | return; | |
3442 | } | |
3443 | ||
3444 | /* gid may be a pid, or minus a pgrp's number */ | |
3445 | #ifdef TIOCSIGSEND | |
3446 | if (!NILP (current_group)) | |
a9f2c884 | 3447 | ioctl (XINT (p->infd), TIOCSIGSEND, signo); |
d0d6b7c5 JB |
3448 | else |
3449 | { | |
3450 | gid = - XFASTINT (p->pid); | |
3451 | kill (gid, signo); | |
3452 | } | |
301c3fe4 | 3453 | #else /* ! defined (TIOCSIGSEND) */ |
d0d6b7c5 | 3454 | EMACS_KILLPG (-gid, signo); |
301c3fe4 | 3455 | #endif /* ! defined (TIOCSIGSEND) */ |
d0d6b7c5 JB |
3456 | } |
3457 | ||
3458 | DEFUN ("interrupt-process", Finterrupt_process, Sinterrupt_process, 0, 2, 0, | |
3459 | "Interrupt process PROCESS. May be process or name of one.\n\ | |
ebb9e16f | 3460 | PROCESS may be a process, a buffer, or the name of a process or buffer.\n\ |
e333e864 | 3461 | nil or no arg means current buffer's process.\n\ |
d0d6b7c5 JB |
3462 | Second arg CURRENT-GROUP non-nil means send signal to\n\ |
3463 | the current process-group of the process's controlling terminal\n\ | |
3464 | rather than to the process's own process group.\n\ | |
3465 | If the process is a shell, this means interrupt current subjob\n\ | |
3466 | rather than the shell.") | |
3467 | (process, current_group) | |
3468 | Lisp_Object process, current_group; | |
3469 | { | |
3470 | process_send_signal (process, SIGINT, current_group, 0); | |
3471 | return process; | |
3472 | } | |
3473 | ||
3474 | DEFUN ("kill-process", Fkill_process, Skill_process, 0, 2, 0, | |
3475 | "Kill process PROCESS. May be process or name of one.\n\ | |
3476 | See function `interrupt-process' for more details on usage.") | |
3477 | (process, current_group) | |
3478 | Lisp_Object process, current_group; | |
3479 | { | |
3480 | process_send_signal (process, SIGKILL, current_group, 0); | |
3481 | return process; | |
3482 | } | |
3483 | ||
3484 | DEFUN ("quit-process", Fquit_process, Squit_process, 0, 2, 0, | |
3485 | "Send QUIT signal to process PROCESS. May be process or name of one.\n\ | |
3486 | See function `interrupt-process' for more details on usage.") | |
3487 | (process, current_group) | |
3488 | Lisp_Object process, current_group; | |
3489 | { | |
3490 | process_send_signal (process, SIGQUIT, current_group, 0); | |
3491 | return process; | |
3492 | } | |
3493 | ||
3494 | DEFUN ("stop-process", Fstop_process, Sstop_process, 0, 2, 0, | |
3495 | "Stop process PROCESS. May be process or name of one.\n\ | |
3496 | See function `interrupt-process' for more details on usage.") | |
3497 | (process, current_group) | |
3498 | Lisp_Object process, current_group; | |
3499 | { | |
3500 | #ifndef SIGTSTP | |
3501 | error ("no SIGTSTP support"); | |
3502 | #else | |
3503 | process_send_signal (process, SIGTSTP, current_group, 0); | |
3504 | #endif | |
3505 | return process; | |
3506 | } | |
3507 | ||
3508 | DEFUN ("continue-process", Fcontinue_process, Scontinue_process, 0, 2, 0, | |
3509 | "Continue process PROCESS. May be process or name of one.\n\ | |
3510 | See function `interrupt-process' for more details on usage.") | |
3511 | (process, current_group) | |
3512 | Lisp_Object process, current_group; | |
3513 | { | |
3514 | #ifdef SIGCONT | |
3515 | process_send_signal (process, SIGCONT, current_group, 0); | |
3516 | #else | |
3517 | error ("no SIGCONT support"); | |
3518 | #endif | |
3519 | return process; | |
3520 | } | |
3521 | ||
3522 | DEFUN ("signal-process", Fsignal_process, Ssignal_process, | |
3523 | 2, 2, "nProcess number: \nnSignal code: ", | |
4766242d RS |
3524 | "Send the process with process id PID the signal with code SIGCODE.\n\ |
3525 | PID must be an integer. The process need not be a child of this Emacs.\n\ | |
3526 | SIGCODE may be an integer, or a symbol whose name is a signal name.") | |
3527 | (pid, sigcode) | |
3528 | Lisp_Object pid, sigcode; | |
d0d6b7c5 JB |
3529 | { |
3530 | CHECK_NUMBER (pid, 0); | |
4766242d RS |
3531 | |
3532 | #define handle_signal(NAME, VALUE) \ | |
3533 | else if (!strcmp (name, NAME)) \ | |
3534 | XSETINT (sigcode, VALUE) | |
3535 | ||
3536 | if (INTEGERP (sigcode)) | |
3537 | ; | |
3538 | else | |
3539 | { | |
3540 | unsigned char *name; | |
3541 | ||
3542 | CHECK_SYMBOL (sigcode, 1); | |
3543 | name = XSYMBOL (sigcode)->name->data; | |
3544 | ||
3545 | if (0) | |
3546 | ; | |
3547 | #ifdef SIGHUP | |
3548 | handle_signal ("SIGHUP", SIGHUP); | |
3549 | #endif | |
3550 | #ifdef SIGINT | |
3551 | handle_signal ("SIGINT", SIGINT); | |
3552 | #endif | |
3553 | #ifdef SIGQUIT | |
3554 | handle_signal ("SIGQUIT", SIGQUIT); | |
3555 | #endif | |
3556 | #ifdef SIGILL | |
3557 | handle_signal ("SIGILL", SIGILL); | |
3558 | #endif | |
3559 | #ifdef SIGABRT | |
3560 | handle_signal ("SIGABRT", SIGABRT); | |
3561 | #endif | |
3562 | #ifdef SIGEMT | |
3563 | handle_signal ("SIGEMT", SIGEMT); | |
3564 | #endif | |
3565 | #ifdef SIGKILL | |
3566 | handle_signal ("SIGKILL", SIGKILL); | |
3567 | #endif | |
3568 | #ifdef SIGFPE | |
3569 | handle_signal ("SIGFPE", SIGFPE); | |
3570 | #endif | |
3571 | #ifdef SIGBUS | |
3572 | handle_signal ("SIGBUS", SIGBUS); | |
3573 | #endif | |
3574 | #ifdef SIGSEGV | |
3575 | handle_signal ("SIGSEGV", SIGSEGV); | |
3576 | #endif | |
3577 | #ifdef SIGSYS | |
3578 | handle_signal ("SIGSYS", SIGSYS); | |
3579 | #endif | |
3580 | #ifdef SIGPIPE | |
3581 | handle_signal ("SIGPIPE", SIGPIPE); | |
3582 | #endif | |
3583 | #ifdef SIGALRM | |
3584 | handle_signal ("SIGALRM", SIGALRM); | |
3585 | #endif | |
3586 | #ifdef SIGTERM | |
3587 | handle_signal ("SIGTERM", SIGTERM); | |
3588 | #endif | |
3589 | #ifdef SIGURG | |
3590 | handle_signal ("SIGURG", SIGURG); | |
3591 | #endif | |
3592 | #ifdef SIGSTOP | |
3593 | handle_signal ("SIGSTOP", SIGSTOP); | |
3594 | #endif | |
3595 | #ifdef SIGTSTP | |
3596 | handle_signal ("SIGTSTP", SIGTSTP); | |
3597 | #endif | |
3598 | #ifdef SIGCONT | |
3599 | handle_signal ("SIGCONT", SIGCONT); | |
3600 | #endif | |
3601 | #ifdef SIGCHLD | |
3602 | handle_signal ("SIGCHLD", SIGCHLD); | |
3603 | #endif | |
3604 | #ifdef SIGTTIN | |
3605 | handle_signal ("SIGTTIN", SIGTTIN); | |
3606 | #endif | |
3607 | #ifdef SIGTTOU | |
3608 | handle_signal ("SIGTTOU", SIGTTOU); | |
3609 | #endif | |
3610 | #ifdef SIGIO | |
3611 | handle_signal ("SIGIO", SIGIO); | |
3612 | #endif | |
3613 | #ifdef SIGXCPU | |
3614 | handle_signal ("SIGXCPU", SIGXCPU); | |
3615 | #endif | |
3616 | #ifdef SIGXFSZ | |
3617 | handle_signal ("SIGXFSZ", SIGXFSZ); | |
3618 | #endif | |
3619 | #ifdef SIGVTALRM | |
3620 | handle_signal ("SIGVTALRM", SIGVTALRM); | |
3621 | #endif | |
3622 | #ifdef SIGPROF | |
3623 | handle_signal ("SIGPROF", SIGPROF); | |
3624 | #endif | |
3625 | #ifdef SIGWINCH | |
3626 | handle_signal ("SIGWINCH", SIGWINCH); | |
3627 | #endif | |
3628 | #ifdef SIGINFO | |
3629 | handle_signal ("SIGINFO", SIGINFO); | |
3630 | #endif | |
3631 | #ifdef SIGUSR1 | |
3632 | handle_signal ("SIGUSR1", SIGUSR1); | |
3633 | #endif | |
3634 | #ifdef SIGUSR2 | |
3635 | handle_signal ("SIGUSR2", SIGUSR2); | |
3636 | #endif | |
3637 | else | |
9fa195a2 | 3638 | error ("Undefined signal name %s", name); |
4766242d RS |
3639 | } |
3640 | ||
3641 | #undef handle_signal | |
3642 | ||
4766242d | 3643 | return make_number (kill (XINT (pid), XINT (sigcode))); |
d0d6b7c5 JB |
3644 | } |
3645 | ||
3646 | DEFUN ("process-send-eof", Fprocess_send_eof, Sprocess_send_eof, 0, 1, 0, | |
3647 | "Make PROCESS see end-of-file in its input.\n\ | |
3648 | Eof comes after any text already sent to it.\n\ | |
ebb9e16f | 3649 | PROCESS may be a process, a buffer, the name of a process or buffer, or\n\ |
d33a00f2 RS |
3650 | nil, indicating the current buffer's process.\n\ |
3651 | If PROCESS is a network connection, or is a process communicating\n\ | |
3652 | through a pipe (as opposed to a pty), then you cannot send any more\n\ | |
3653 | text to PROCESS after you call this function.") | |
d0d6b7c5 JB |
3654 | (process) |
3655 | Lisp_Object process; | |
3656 | { | |
3657 | Lisp_Object proc; | |
3658 | ||
3659 | proc = get_process (process); | |
577d03d5 RS |
3660 | |
3661 | /* Make sure the process is really alive. */ | |
3662 | if (! NILP (XPROCESS (proc)->raw_status_low)) | |
3663 | update_status (XPROCESS (proc)); | |
3664 | if (! EQ (XPROCESS (proc)->status, Qrun)) | |
dcf970e6 | 3665 | error ("Process %s not running", XSTRING (XPROCESS (proc)->name)->data); |
577d03d5 | 3666 | |
d0d6b7c5 | 3667 | #ifdef VMS |
4556b700 | 3668 | send_process (proc, "\032", 1, Qnil); /* ^z */ |
d0d6b7c5 JB |
3669 | #else |
3670 | if (!NILP (XPROCESS (proc)->pty_flag)) | |
4556b700 | 3671 | send_process (proc, "\004", 1, Qnil); |
d0d6b7c5 JB |
3672 | else |
3673 | { | |
93853f3d | 3674 | #ifdef HAVE_SHUTDOWN |
02f55c4b RS |
3675 | /* If this is a network connection, or socketpair is used |
3676 | for communication with the subprocess, call shutdown to cause EOF. | |
3677 | (In some old system, shutdown to socketpair doesn't work. | |
3678 | Then we just can't win.) */ | |
3679 | if (NILP (XPROCESS (proc)->pid) | |
3680 | || XINT (XPROCESS (proc)->outfd) == XINT (XPROCESS (proc)->infd)) | |
3681 | shutdown (XINT (XPROCESS (proc)->outfd), 1); | |
3682 | /* In case of socketpair, outfd == infd, so don't close it. */ | |
3683 | if (XINT (XPROCESS (proc)->outfd) != XINT (XPROCESS (proc)->infd)) | |
3684 | close (XINT (XPROCESS (proc)->outfd)); | |
93853f3d RS |
3685 | #else /* not HAVE_SHUTDOWN */ |
3686 | close (XINT (XPROCESS (proc)->outfd)); | |
3687 | #endif /* not HAVE_SHUTDOWN */ | |
1d056e64 | 3688 | XSETINT (XPROCESS (proc)->outfd, open (NULL_DEVICE, O_WRONLY)); |
d0d6b7c5 JB |
3689 | } |
3690 | #endif /* VMS */ | |
d0d6b7c5 JB |
3691 | return process; |
3692 | } | |
3693 | ||
3694 | /* Kill all processes associated with `buffer'. | |
3695 | If `buffer' is nil, kill all processes */ | |
3696 | ||
3697 | kill_buffer_processes (buffer) | |
3698 | Lisp_Object buffer; | |
3699 | { | |
3700 | Lisp_Object tail, proc; | |
3701 | ||
b5b502d6 | 3702 | for (tail = Vprocess_alist; GC_CONSP (tail); tail = XCONS (tail)->cdr) |
d0d6b7c5 JB |
3703 | { |
3704 | proc = XCONS (XCONS (tail)->car)->cdr; | |
b5b502d6 | 3705 | if (GC_PROCESSP (proc) |
d0d6b7c5 JB |
3706 | && (NILP (buffer) || EQ (XPROCESS (proc)->buffer, buffer))) |
3707 | { | |
3708 | if (NETCONN_P (proc)) | |
e1ab4959 | 3709 | Fdelete_process (proc); |
a9f2c884 | 3710 | else if (XINT (XPROCESS (proc)->infd) >= 0) |
d0d6b7c5 JB |
3711 | process_send_signal (proc, SIGHUP, Qnil, 1); |
3712 | } | |
3713 | } | |
3714 | } | |
3715 | \f | |
3716 | /* On receipt of a signal that a child status has changed, | |
3717 | loop asking about children with changed statuses until | |
3718 | the system says there are no more. | |
3719 | All we do is change the status; | |
3720 | we do not run sentinels or print notifications. | |
3721 | That is saved for the next time keyboard input is done, | |
3722 | in order to avoid timing errors. */ | |
3723 | ||
3724 | /** WARNING: this can be called during garbage collection. | |
3725 | Therefore, it must not be fooled by the presence of mark bits in | |
3726 | Lisp objects. */ | |
3727 | ||
3728 | /** USG WARNING: Although it is not obvious from the documentation | |
3729 | in signal(2), on a USG system the SIGCLD handler MUST NOT call | |
3730 | signal() before executing at least one wait(), otherwise the handler | |
3731 | will be called again, resulting in an infinite loop. The relevant | |
3732 | portion of the documentation reads "SIGCLD signals will be queued | |
3733 | and the signal-catching function will be continually reentered until | |
3734 | the queue is empty". Invoking signal() causes the kernel to reexamine | |
3735 | the SIGCLD queue. Fred Fish, UniSoft Systems Inc. */ | |
3736 | ||
3737 | SIGTYPE | |
3738 | sigchld_handler (signo) | |
3739 | int signo; | |
3740 | { | |
3741 | int old_errno = errno; | |
3742 | Lisp_Object proc; | |
3743 | register struct Lisp_Process *p; | |
6be429b1 | 3744 | extern EMACS_TIME *input_available_clear_time; |
d0d6b7c5 JB |
3745 | |
3746 | #ifdef BSD4_1 | |
3747 | extern int sigheld; | |
3748 | sigheld |= sigbit (SIGCHLD); | |
3749 | #endif | |
3750 | ||
3751 | while (1) | |
3752 | { | |
3753 | register int pid; | |
3754 | WAITTYPE w; | |
3755 | Lisp_Object tail; | |
3756 | ||
3757 | #ifdef WNOHANG | |
3758 | #ifndef WUNTRACED | |
3759 | #define WUNTRACED 0 | |
3760 | #endif /* no WUNTRACED */ | |
3761 | /* Keep trying to get a status until we get a definitive result. */ | |
3762 | do | |
3763 | { | |
3764 | errno = 0; | |
3765 | pid = wait3 (&w, WNOHANG | WUNTRACED, 0); | |
3766 | } | |
3767 | while (pid <= 0 && errno == EINTR); | |
3768 | ||
3769 | if (pid <= 0) | |
3770 | { | |
3771 | /* A real failure. We have done all our job, so return. */ | |
3772 | ||
3773 | /* USG systems forget handlers when they are used; | |
3774 | must reestablish each time */ | |
3c0ee47b | 3775 | #if defined (USG) && !defined (POSIX_SIGNALS) |
d0d6b7c5 JB |
3776 | signal (signo, sigchld_handler); /* WARNING - must come after wait3() */ |
3777 | #endif | |
3778 | #ifdef BSD4_1 | |
3779 | sigheld &= ~sigbit (SIGCHLD); | |
3780 | sigrelse (SIGCHLD); | |
3781 | #endif | |
3782 | errno = old_errno; | |
3783 | return; | |
3784 | } | |
3785 | #else | |
3786 | pid = wait (&w); | |
3787 | #endif /* no WNOHANG */ | |
3788 | ||
3789 | /* Find the process that signaled us, and record its status. */ | |
3790 | ||
3791 | p = 0; | |
7968cc2d | 3792 | for (tail = Vprocess_alist; CONSP (tail); tail = XCONS (tail)->cdr) |
d0d6b7c5 JB |
3793 | { |
3794 | proc = XCONS (XCONS (tail)->car)->cdr; | |
3795 | p = XPROCESS (proc); | |
3796 | if (EQ (p->childp, Qt) && XFASTINT (p->pid) == pid) | |
3797 | break; | |
3798 | p = 0; | |
3799 | } | |
3800 | ||
3801 | /* Look for an asynchronous process whose pid hasn't been filled | |
3802 | in yet. */ | |
3803 | if (p == 0) | |
7968cc2d | 3804 | for (tail = Vprocess_alist; CONSP (tail); tail = XCONS (tail)->cdr) |
d0d6b7c5 JB |
3805 | { |
3806 | proc = XCONS (XCONS (tail)->car)->cdr; | |
3807 | p = XPROCESS (proc); | |
bcd69aea | 3808 | if (INTEGERP (p->pid) && XINT (p->pid) == -1) |
d0d6b7c5 JB |
3809 | break; |
3810 | p = 0; | |
3811 | } | |
3812 | ||
3813 | /* Change the status of the process that was found. */ | |
3814 | if (p != 0) | |
3815 | { | |
3816 | union { int i; WAITTYPE wt; } u; | |
e98d950b | 3817 | int clear_desc_flag = 0; |
d0d6b7c5 JB |
3818 | |
3819 | XSETINT (p->tick, ++process_tick); | |
3820 | u.wt = w; | |
5fc0154c RS |
3821 | XSETINT (p->raw_status_low, u.i & 0xffff); |
3822 | XSETINT (p->raw_status_high, u.i >> 16); | |
d0d6b7c5 JB |
3823 | |
3824 | /* If process has terminated, stop waiting for its output. */ | |
e98d950b RS |
3825 | if ((WIFSIGNALED (w) || WIFEXITED (w)) |
3826 | && XINT (p->infd) >= 0) | |
3827 | clear_desc_flag = 1; | |
3828 | ||
3829 | /* We use clear_desc_flag to avoid a compiler bug in Microsoft C. */ | |
3830 | if (clear_desc_flag) | |
3831 | { | |
3832 | FD_CLR (XINT (p->infd), &input_wait_mask); | |
3833 | FD_CLR (XINT (p->infd), &non_keyboard_wait_mask); | |
3834 | } | |
6be429b1 JB |
3835 | |
3836 | /* Tell wait_reading_process_input that it needs to wake up and | |
3837 | look around. */ | |
3838 | if (input_available_clear_time) | |
3839 | EMACS_SET_SECS_USECS (*input_available_clear_time, 0, 0); | |
d0d6b7c5 JB |
3840 | } |
3841 | ||
3842 | /* There was no asynchronous process found for that id. Check | |
3843 | if we have a synchronous process. */ | |
3844 | else | |
3845 | { | |
3846 | synch_process_alive = 0; | |
3847 | ||
3848 | /* Report the status of the synchronous process. */ | |
3849 | if (WIFEXITED (w)) | |
3850 | synch_process_retcode = WRETCODE (w); | |
3851 | else if (WIFSIGNALED (w)) | |
b97ad9ea RS |
3852 | { |
3853 | int code = WTERMSIG (w); | |
3854 | char *signame = 0; | |
3855 | ||
3856 | if (code < NSIG) | |
3857 | { | |
b0310da4 | 3858 | #ifndef VMS |
ed0cae05 RS |
3859 | /* Suppress warning if the table has const char *. */ |
3860 | signame = (char *) sys_siglist[code]; | |
b0310da4 | 3861 | #else |
b97ad9ea | 3862 | signame = sys_errlist[code]; |
b0310da4 | 3863 | #endif |
b97ad9ea RS |
3864 | } |
3865 | if (signame == 0) | |
3866 | signame = "unknown"; | |
3867 | ||
3868 | synch_process_death = signame; | |
3869 | } | |
6be429b1 JB |
3870 | |
3871 | /* Tell wait_reading_process_input that it needs to wake up and | |
3872 | look around. */ | |
3873 | if (input_available_clear_time) | |
3874 | EMACS_SET_SECS_USECS (*input_available_clear_time, 0, 0); | |
d0d6b7c5 JB |
3875 | } |
3876 | ||
3877 | /* On some systems, we must return right away. | |
3878 | If any more processes want to signal us, we will | |
3879 | get another signal. | |
3880 | Otherwise (on systems that have WNOHANG), loop around | |
3881 | to use up all the processes that have something to tell us. */ | |
e98d950b | 3882 | #if defined (USG) && ! (defined (HPUX) && defined (WNOHANG)) || defined (WINDOWSNT) |
3c0ee47b | 3883 | #if defined (USG) && ! defined (POSIX_SIGNALS) |
d0d6b7c5 JB |
3884 | signal (signo, sigchld_handler); |
3885 | #endif | |
3886 | errno = old_errno; | |
3887 | return; | |
3888 | #endif /* USG, but not HPUX with WNOHANG */ | |
3889 | } | |
3890 | } | |
3891 | \f | |
3892 | ||
3893 | static Lisp_Object | |
3894 | exec_sentinel_unwind (data) | |
3895 | Lisp_Object data; | |
3896 | { | |
3897 | XPROCESS (XCONS (data)->car)->sentinel = XCONS (data)->cdr; | |
3898 | return Qnil; | |
3899 | } | |
3900 | ||
3b9a3dfa RS |
3901 | static Lisp_Object |
3902 | exec_sentinel_error_handler (error) | |
3903 | Lisp_Object error; | |
3904 | { | |
3905 | cmd_error_internal (error, "error in process sentinel: "); | |
3906 | Vinhibit_quit = Qt; | |
3907 | update_echo_area (); | |
833ba342 | 3908 | Fsleep_for (make_number (2), Qnil); |
3b9a3dfa RS |
3909 | } |
3910 | ||
d0d6b7c5 JB |
3911 | static void |
3912 | exec_sentinel (proc, reason) | |
3913 | Lisp_Object proc, reason; | |
3914 | { | |
dfc21838 | 3915 | Lisp_Object sentinel, obuffer, odeactivate, okeymap; |
d0d6b7c5 JB |
3916 | register struct Lisp_Process *p = XPROCESS (proc); |
3917 | int count = specpdl_ptr - specpdl; | |
4da2f5be | 3918 | int outer_running_asynch_code = running_asynch_code; |
d0d6b7c5 | 3919 | |
dfc21838 RS |
3920 | /* No need to gcpro these, because all we do with them later |
3921 | is test them for EQness, and none of them should be a string. */ | |
8fb3cf64 | 3922 | odeactivate = Vdeactivate_mark; |
dfc21838 RS |
3923 | XSETBUFFER (obuffer, current_buffer); |
3924 | okeymap = current_buffer->keymap; | |
3925 | ||
d0d6b7c5 JB |
3926 | sentinel = p->sentinel; |
3927 | if (NILP (sentinel)) | |
3928 | return; | |
3929 | ||
3930 | /* Zilch the sentinel while it's running, to avoid recursive invocations; | |
3931 | assure that it gets restored no matter how the sentinel exits. */ | |
3932 | p->sentinel = Qnil; | |
3933 | record_unwind_protect (exec_sentinel_unwind, Fcons (proc, sentinel)); | |
3934 | /* Inhibit quit so that random quits don't screw up a running filter. */ | |
3935 | specbind (Qinhibit_quit, Qt); | |
6545aada | 3936 | specbind (Qlast_nonmenu_event, Qt); |
3b9a3dfa | 3937 | |
4da2f5be RS |
3938 | /* In case we get recursively called, |
3939 | and we already saved the match data nonrecursively, | |
3940 | save the same match data in safely recursive fashion. */ | |
3941 | if (outer_running_asynch_code) | |
3942 | { | |
3943 | Lisp_Object tem; | |
dd130227 | 3944 | tem = Fmatch_data (Qnil, Qnil); |
4da2f5be | 3945 | restore_match_data (); |
dd130227 | 3946 | record_unwind_protect (Fstore_match_data, Fmatch_data (Qnil, Qnil)); |
4da2f5be RS |
3947 | Fstore_match_data (tem); |
3948 | } | |
3949 | ||
3950 | /* For speed, if a search happens within this code, | |
3951 | save the match data in a special nonrecursive fashion. */ | |
7074fde6 | 3952 | running_asynch_code = 1; |
4da2f5be | 3953 | |
3b9a3dfa RS |
3954 | internal_condition_case_1 (read_process_output_call, |
3955 | Fcons (sentinel, | |
3956 | Fcons (proc, Fcons (reason, Qnil))), | |
3957 | !NILP (Vdebug_on_error) ? Qnil : Qerror, | |
3958 | exec_sentinel_error_handler); | |
4da2f5be RS |
3959 | |
3960 | /* If we saved the match data nonrecursively, restore it now. */ | |
7074fde6 | 3961 | restore_match_data (); |
4da2f5be | 3962 | running_asynch_code = outer_running_asynch_code; |
8fb3cf64 KH |
3963 | |
3964 | Vdeactivate_mark = odeactivate; | |
7973cfa8 | 3965 | #if 0 |
dfc21838 RS |
3966 | if (! EQ (Fcurrent_buffer (), obuffer) |
3967 | || ! EQ (current_buffer->keymap, okeymap)) | |
7973cfa8 | 3968 | #endif |
927e08be RS |
3969 | /* But do it only if the caller is actually going to read events. |
3970 | Otherwise there's no need to make him wake up, and it could | |
3971 | cause trouble (for example it would make Fsit_for return). */ | |
3972 | if (waiting_for_user_input_p == -1) | |
3973 | record_asynch_buffer_change (); | |
8fb3cf64 | 3974 | |
2ea6d561 | 3975 | unbind_to (count, Qnil); |
d0d6b7c5 JB |
3976 | } |
3977 | ||
3978 | /* Report all recent events of a change in process status | |
3979 | (either run the sentinel or output a message). | |
3980 | This is done while Emacs is waiting for keyboard input. */ | |
3981 | ||
3982 | status_notify () | |
3983 | { | |
3984 | register Lisp_Object proc, buffer; | |
2e4149a8 | 3985 | Lisp_Object tail, msg; |
d0d6b7c5 JB |
3986 | struct gcpro gcpro1, gcpro2; |
3987 | ||
2e4149a8 KH |
3988 | tail = Qnil; |
3989 | msg = Qnil; | |
d0d6b7c5 JB |
3990 | /* We need to gcpro tail; if read_process_output calls a filter |
3991 | which deletes a process and removes the cons to which tail points | |
3992 | from Vprocess_alist, and then causes a GC, tail is an unprotected | |
3993 | reference. */ | |
3994 | GCPRO2 (tail, msg); | |
3995 | ||
30623085 RS |
3996 | /* Set this now, so that if new processes are created by sentinels |
3997 | that we run, we get called again to handle their status changes. */ | |
3998 | update_tick = process_tick; | |
3999 | ||
4000 | for (tail = Vprocess_alist; !NILP (tail); tail = Fcdr (tail)) | |
d0d6b7c5 | 4001 | { |
30623085 RS |
4002 | Lisp_Object symbol; |
4003 | register struct Lisp_Process *p; | |
4004 | ||
4005 | proc = Fcdr (Fcar (tail)); | |
4006 | p = XPROCESS (proc); | |
4007 | ||
4008 | if (XINT (p->tick) != XINT (p->update_tick)) | |
d0d6b7c5 | 4009 | { |
30623085 | 4010 | XSETINT (p->update_tick, XINT (p->tick)); |
d0d6b7c5 | 4011 | |
30623085 | 4012 | /* If process is still active, read any output that remains. */ |
4da2f5be RS |
4013 | while (! EQ (p->filter, Qt) |
4014 | && XINT (p->infd) >= 0 | |
4015 | && read_process_output (proc, XINT (p->infd)) > 0); | |
d0d6b7c5 | 4016 | |
30623085 | 4017 | buffer = p->buffer; |
d0d6b7c5 | 4018 | |
30623085 RS |
4019 | /* Get the text to use for the message. */ |
4020 | if (!NILP (p->raw_status_low)) | |
4021 | update_status (p); | |
4022 | msg = status_message (p->status); | |
d0d6b7c5 | 4023 | |
30623085 RS |
4024 | /* If process is terminated, deactivate it or delete it. */ |
4025 | symbol = p->status; | |
4026 | if (CONSP (p->status)) | |
4027 | symbol = XCONS (p->status)->car; | |
d0d6b7c5 | 4028 | |
30623085 RS |
4029 | if (EQ (symbol, Qsignal) || EQ (symbol, Qexit) |
4030 | || EQ (symbol, Qclosed)) | |
4031 | { | |
4032 | if (delete_exited_processes) | |
4033 | remove_process (proc); | |
4034 | else | |
4035 | deactivate_process (proc); | |
4036 | } | |
d0d6b7c5 | 4037 | |
0ad61fe7 RS |
4038 | /* The actions above may have further incremented p->tick. |
4039 | So set p->update_tick again | |
4040 | so that an error in the sentinel will not cause | |
4041 | this code to be run again. */ | |
4042 | XSETINT (p->update_tick, XINT (p->tick)); | |
30623085 RS |
4043 | /* Now output the message suitably. */ |
4044 | if (!NILP (p->sentinel)) | |
4045 | exec_sentinel (proc, msg); | |
4046 | /* Don't bother with a message in the buffer | |
4047 | when a process becomes runnable. */ | |
4048 | else if (!EQ (symbol, Qrun) && !NILP (buffer)) | |
4049 | { | |
4050 | Lisp_Object ro, tem; | |
4051 | struct buffer *old = current_buffer; | |
4052 | int opoint; | |
12ca5cdf | 4053 | int before; |
2e4149a8 | 4054 | |
30623085 | 4055 | ro = XBUFFER (buffer)->read_only; |
d0d6b7c5 | 4056 | |
30623085 RS |
4057 | /* Avoid error if buffer is deleted |
4058 | (probably that's why the process is dead, too) */ | |
4059 | if (NILP (XBUFFER (buffer)->name)) | |
4060 | continue; | |
4061 | Fset_buffer (buffer); | |
12ca5cdf | 4062 | |
6ec8bbd2 | 4063 | opoint = PT; |
30623085 RS |
4064 | /* Insert new output into buffer |
4065 | at the current end-of-output marker, | |
4066 | thus preserving logical ordering of input and output. */ | |
4067 | if (XMARKER (p->mark)->buffer) | |
4068 | SET_PT (marker_position (p->mark)); | |
4069 | else | |
4070 | SET_PT (ZV); | |
12ca5cdf RS |
4071 | |
4072 | before = PT; | |
30623085 RS |
4073 | |
4074 | tem = current_buffer->read_only; | |
4075 | current_buffer->read_only = Qnil; | |
4076 | insert_string ("\nProcess "); | |
4077 | Finsert (1, &p->name); | |
4078 | insert_string (" "); | |
4079 | Finsert (1, &msg); | |
4080 | current_buffer->read_only = tem; | |
6ec8bbd2 | 4081 | Fset_marker (p->mark, make_number (PT), p->buffer); |
30623085 | 4082 | |
12ca5cdf RS |
4083 | if (opoint >= before) |
4084 | SET_PT (opoint + (PT - before)); | |
4085 | else | |
4086 | SET_PT (opoint); | |
4087 | ||
30623085 | 4088 | set_buffer_internal (old); |
d0d6b7c5 | 4089 | } |
30623085 RS |
4090 | } |
4091 | } /* end for */ | |
d0d6b7c5 JB |
4092 | |
4093 | update_mode_lines++; /* in case buffers use %s in mode-line-format */ | |
4094 | redisplay_preserve_echo_area (); | |
4095 | ||
d0d6b7c5 JB |
4096 | UNGCPRO; |
4097 | } | |
0fa1789e KH |
4098 | |
4099 | \f | |
4100 | DEFUN ("set-process-coding-system", Fset_process_coding_system, | |
4101 | Sset_process_coding_system, 1, 3, 0, | |
a95c35f6 | 4102 | "Set coding systems of PROCESS to DECODING (input from the process) and\n\ |
0fa1789e KH |
4103 | ENCODING (output to the process).") |
4104 | (proc, decoding, encoding) | |
4105 | register Lisp_Object proc, decoding, encoding; | |
4106 | { | |
4107 | register struct Lisp_Process *p; | |
4108 | ||
4109 | CHECK_PROCESS (proc, 0); | |
4110 | p = XPROCESS (proc); | |
4111 | if (XINT (p->infd) < 0) | |
4112 | error ("Input file descriptor of %s closed", XSTRING (p->name)->data); | |
4113 | if (XINT (p->outfd) < 0) | |
4114 | error ("Output file descriptor of %s closed", XSTRING (p->name)->data); | |
4115 | ||
4116 | p->decode_coding_system = Fcheck_coding_system (decoding); | |
4117 | p->encode_coding_system = Fcheck_coding_system (encoding); | |
4118 | setup_coding_system (decoding, | |
c7580538 | 4119 | proc_decode_coding_system[XINT (p->infd)]); |
0fa1789e | 4120 | setup_coding_system (encoding, |
c7580538 | 4121 | proc_encode_coding_system[XINT (p->outfd)]); |
0fa1789e KH |
4122 | |
4123 | return Qnil; | |
4124 | } | |
4125 | ||
4126 | DEFUN ("process-coding-system", | |
4127 | Fprocess_coding_system, Sprocess_coding_system, 1, 1, 0, | |
a95c35f6 | 4128 | "Return a cons of coding systems for decoding and encoding of PROCESS.") |
0fa1789e KH |
4129 | (proc) |
4130 | register Lisp_Object proc; | |
4131 | { | |
4132 | CHECK_PROCESS (proc, 0); | |
4133 | return Fcons (XPROCESS (proc)->decode_coding_system, | |
4134 | XPROCESS (proc)->encode_coding_system); | |
4135 | } | |
d0d6b7c5 | 4136 | \f |
a69281ff RS |
4137 | /* The first time this is called, assume keyboard input comes from DESC |
4138 | instead of from where we used to expect it. | |
4139 | Subsequent calls mean assume input keyboard can come from DESC | |
4140 | in addition to other places. */ | |
4141 | ||
4142 | static int add_keyboard_wait_descriptor_called_flag; | |
4143 | ||
4144 | void | |
4145 | add_keyboard_wait_descriptor (desc) | |
4146 | int desc; | |
4147 | { | |
4148 | if (! add_keyboard_wait_descriptor_called_flag) | |
4149 | FD_CLR (0, &input_wait_mask); | |
4150 | add_keyboard_wait_descriptor_called_flag = 1; | |
4151 | FD_SET (desc, &input_wait_mask); | |
b5dc1c83 | 4152 | FD_SET (desc, &non_process_wait_mask); |
a69281ff RS |
4153 | if (desc > max_keyboard_desc) |
4154 | max_keyboard_desc = desc; | |
4155 | } | |
4156 | ||
4157 | /* From now on, do not expect DESC to give keyboard input. */ | |
4158 | ||
4159 | void | |
4160 | delete_keyboard_wait_descriptor (desc) | |
4161 | int desc; | |
4162 | { | |
4163 | int fd; | |
4164 | int lim = max_keyboard_desc; | |
4165 | ||
4166 | FD_CLR (desc, &input_wait_mask); | |
b5dc1c83 | 4167 | FD_CLR (desc, &non_process_wait_mask); |
a69281ff RS |
4168 | |
4169 | if (desc == max_keyboard_desc) | |
4170 | for (fd = 0; fd < lim; fd++) | |
4171 | if (FD_ISSET (fd, &input_wait_mask) | |
4172 | && !FD_ISSET (fd, &non_keyboard_wait_mask)) | |
4173 | max_keyboard_desc = fd; | |
4174 | } | |
4175 | ||
4176 | /* Return nonzero if *MASK has a bit set | |
4177 | that corresponds to one of the keyboard input descriptors. */ | |
4178 | ||
4179 | int | |
4180 | keyboard_bit_set (mask) | |
4181 | SELECT_TYPE *mask; | |
4182 | { | |
4183 | int fd; | |
4184 | ||
ee8e09af | 4185 | for (fd = 0; fd <= max_keyboard_desc; fd++) |
a69281ff RS |
4186 | if (FD_ISSET (fd, mask) && FD_ISSET (fd, &input_wait_mask) |
4187 | && !FD_ISSET (fd, &non_keyboard_wait_mask)) | |
4188 | return 1; | |
4189 | ||
4190 | return 0; | |
4191 | } | |
4192 | \f | |
d0d6b7c5 JB |
4193 | init_process () |
4194 | { | |
4195 | register int i; | |
4196 | ||
4197 | #ifdef SIGCHLD | |
4198 | #ifndef CANNOT_DUMP | |
4199 | if (! noninteractive || initialized) | |
4200 | #endif | |
4201 | signal (SIGCHLD, sigchld_handler); | |
4202 | #endif | |
4203 | ||
4204 | FD_ZERO (&input_wait_mask); | |
a69281ff | 4205 | FD_ZERO (&non_keyboard_wait_mask); |
b5dc1c83 | 4206 | FD_ZERO (&non_process_wait_mask); |
7d0e672e | 4207 | max_process_desc = 0; |
dd2281ae | 4208 | |
a69281ff | 4209 | FD_SET (0, &input_wait_mask); |
dd2281ae | 4210 | |
d0d6b7c5 JB |
4211 | Vprocess_alist = Qnil; |
4212 | for (i = 0; i < MAXDESC; i++) | |
4213 | { | |
4214 | chan_process[i] = Qnil; | |
4215 | proc_buffered_char[i] = -1; | |
4216 | } | |
c7580538 KH |
4217 | bzero (proc_decode_coding_system, sizeof proc_decode_coding_system); |
4218 | bzero (proc_encode_coding_system, sizeof proc_encode_coding_system); | |
d0d6b7c5 | 4219 | } |
312c9964 | 4220 | |
d0d6b7c5 JB |
4221 | syms_of_process () |
4222 | { | |
d0d6b7c5 JB |
4223 | Qprocessp = intern ("processp"); |
4224 | staticpro (&Qprocessp); | |
4225 | Qrun = intern ("run"); | |
4226 | staticpro (&Qrun); | |
4227 | Qstop = intern ("stop"); | |
4228 | staticpro (&Qstop); | |
4229 | Qsignal = intern ("signal"); | |
4230 | staticpro (&Qsignal); | |
4231 | ||
4232 | /* Qexit is already staticpro'd by syms_of_eval; don't staticpro it | |
4233 | here again. | |
4234 | ||
4235 | Qexit = intern ("exit"); | |
4236 | staticpro (&Qexit); */ | |
4237 | ||
4238 | Qopen = intern ("open"); | |
4239 | staticpro (&Qopen); | |
4240 | Qclosed = intern ("closed"); | |
4241 | staticpro (&Qclosed); | |
4242 | ||
6545aada RS |
4243 | Qlast_nonmenu_event = intern ("last-nonmenu-event"); |
4244 | staticpro (&Qlast_nonmenu_event); | |
4245 | ||
d0d6b7c5 JB |
4246 | staticpro (&Vprocess_alist); |
4247 | ||
4248 | DEFVAR_BOOL ("delete-exited-processes", &delete_exited_processes, | |
4249 | "*Non-nil means delete processes immediately when they exit.\n\ | |
4250 | nil means don't delete them until `list-processes' is run."); | |
4251 | ||
4252 | delete_exited_processes = 1; | |
4253 | ||
4254 | DEFVAR_LISP ("process-connection-type", &Vprocess_connection_type, | |
4255 | "Control type of device used to communicate with subprocesses.\n\ | |
e333e864 RS |
4256 | Values are nil to use a pipe, or t or `pty' to use a pty.\n\ |
4257 | The value has no effect if the system has no ptys or if all ptys are busy:\n\ | |
4258 | then a pipe is used in any case.\n\ | |
4259 | The value takes effect when `start-process' is called."); | |
d0d6b7c5 JB |
4260 | Vprocess_connection_type = Qt; |
4261 | ||
4262 | defsubr (&Sprocessp); | |
4263 | defsubr (&Sget_process); | |
4264 | defsubr (&Sget_buffer_process); | |
4265 | defsubr (&Sdelete_process); | |
4266 | defsubr (&Sprocess_status); | |
4267 | defsubr (&Sprocess_exit_status); | |
4268 | defsubr (&Sprocess_id); | |
4269 | defsubr (&Sprocess_name); | |
3b9a3dfa | 4270 | defsubr (&Sprocess_tty_name); |
d0d6b7c5 JB |
4271 | defsubr (&Sprocess_command); |
4272 | defsubr (&Sset_process_buffer); | |
4273 | defsubr (&Sprocess_buffer); | |
4274 | defsubr (&Sprocess_mark); | |
4275 | defsubr (&Sset_process_filter); | |
4276 | defsubr (&Sprocess_filter); | |
4277 | defsubr (&Sset_process_sentinel); | |
4278 | defsubr (&Sprocess_sentinel); | |
de282a05 | 4279 | defsubr (&Sset_process_window_size); |
d0d6b7c5 | 4280 | defsubr (&Sprocess_kill_without_query); |
de282a05 | 4281 | defsubr (&Sprocess_contact); |
d0d6b7c5 JB |
4282 | defsubr (&Slist_processes); |
4283 | defsubr (&Sprocess_list); | |
4284 | defsubr (&Sstart_process); | |
4285 | #ifdef HAVE_SOCKETS | |
4286 | defsubr (&Sopen_network_stream); | |
4287 | #endif /* HAVE_SOCKETS */ | |
4288 | defsubr (&Saccept_process_output); | |
4289 | defsubr (&Sprocess_send_region); | |
4290 | defsubr (&Sprocess_send_string); | |
4291 | defsubr (&Sinterrupt_process); | |
4292 | defsubr (&Skill_process); | |
4293 | defsubr (&Squit_process); | |
4294 | defsubr (&Sstop_process); | |
4295 | defsubr (&Scontinue_process); | |
4296 | defsubr (&Sprocess_send_eof); | |
4297 | defsubr (&Ssignal_process); | |
4298 | defsubr (&Swaiting_for_user_input_p); | |
4299 | /* defsubr (&Sprocess_connection); */ | |
0fa1789e KH |
4300 | defsubr (&Sset_process_coding_system); |
4301 | defsubr (&Sprocess_coding_system); | |
d0d6b7c5 JB |
4302 | } |
4303 | ||
6720a7fb JB |
4304 | \f |
4305 | #else /* not subprocesses */ | |
4306 | ||
4307 | #include <sys/types.h> | |
4308 | #include <errno.h> | |
4309 | ||
4310 | #include "lisp.h" | |
4311 | #include "systime.h" | |
4312 | #include "termopts.h" | |
81afb6d1 | 4313 | #include "sysselect.h" |
6720a7fb | 4314 | |
ff11dfa1 | 4315 | extern int frame_garbaged; |
6720a7fb | 4316 | |
f694e5d2 KH |
4317 | extern EMACS_TIME timer_check (); |
4318 | extern int timers_run; | |
6720a7fb JB |
4319 | |
4320 | /* As described above, except assuming that there are no subprocesses: | |
4321 | ||
4322 | Wait for timeout to elapse and/or keyboard input to be available. | |
4323 | ||
4324 | time_limit is: | |
4325 | timeout in seconds, or | |
4326 | zero for no limit, or | |
4327 | -1 means gobble data immediately available but don't wait for any. | |
4328 | ||
f76475ad | 4329 | read_kbd is a Lisp_Object: |
6720a7fb JB |
4330 | 0 to ignore keyboard input, or |
4331 | 1 to return when input is available, or | |
4332 | -1 means caller will actually read the input, so don't throw to | |
4333 | the quit handler. | |
0a65b032 RS |
4334 | a cons cell, meaning wait until its car is non-nil |
4335 | (and gobble terminal input into the buffer if any arrives), or | |
6720a7fb JB |
4336 | We know that read_kbd will never be a Lisp_Process, since |
4337 | `subprocesses' isn't defined. | |
4338 | ||
4339 | do_display != 0 means redisplay should be done to show subprocess | |
5164ee8e | 4340 | output that arrives. |
6720a7fb | 4341 | |
eb8c3be9 | 4342 | Return true iff we received input from any process. */ |
6720a7fb JB |
4343 | |
4344 | int | |
4345 | wait_reading_process_input (time_limit, microsecs, read_kbd, do_display) | |
f76475ad JB |
4346 | int time_limit, microsecs; |
4347 | Lisp_Object read_kbd; | |
4348 | int do_display; | |
6720a7fb | 4349 | { |
f694e5d2 | 4350 | EMACS_TIME end_time, timeout; |
8db121c4 | 4351 | SELECT_TYPE waitchannels; |
f694e5d2 | 4352 | int xerrno; |
0a65b032 RS |
4353 | Lisp_Object *wait_for_cell = 0; |
4354 | ||
4355 | /* If waiting for non-nil in a cell, record where. */ | |
4356 | if (CONSP (read_kbd)) | |
4357 | { | |
4358 | wait_for_cell = &XCONS (read_kbd)->car; | |
4359 | XSETFASTINT (read_kbd, 0); | |
4360 | } | |
6720a7fb JB |
4361 | |
4362 | /* What does time_limit really mean? */ | |
4363 | if (time_limit || microsecs) | |
4364 | { | |
6720a7fb JB |
4365 | if (time_limit == -1) |
4366 | /* In fact, it's zero. */ | |
4367 | EMACS_SET_SECS_USECS (timeout, 0, 0); | |
4368 | else | |
4369 | EMACS_SET_SECS_USECS (timeout, time_limit, microsecs); | |
4370 | ||
4371 | /* How far in the future is that? */ | |
4372 | EMACS_GET_TIME (end_time); | |
4373 | EMACS_ADD_TIME (end_time, end_time, timeout); | |
4374 | } | |
4375 | else | |
4376 | /* It's infinite. */ | |
f694e5d2 | 4377 | EMACS_SET_SECS_USECS (timeout, 100000, 0); |
6720a7fb JB |
4378 | |
4379 | /* Turn off periodic alarms (in case they are in use) | |
4380 | because the select emulator uses alarms. */ | |
4381 | stop_polling (); | |
4382 | ||
4383 | for (;;) | |
4384 | { | |
4385 | int nfds; | |
bae8d137 | 4386 | int timeout_reduced_for_timers = 0; |
6720a7fb | 4387 | |
6720a7fb JB |
4388 | /* If calling from keyboard input, do not quit |
4389 | since we want to return C-g as an input character. | |
4390 | Otherwise, do pending quit if requested. */ | |
f76475ad | 4391 | if (XINT (read_kbd) >= 0) |
6720a7fb JB |
4392 | QUIT; |
4393 | ||
0a65b032 RS |
4394 | /* Exit now if the cell we're waiting for became non-nil. */ |
4395 | if (wait_for_cell && ! NILP (*wait_for_cell)) | |
4396 | break; | |
4397 | ||
bae8d137 RS |
4398 | /* Compute time from now till when time limit is up */ |
4399 | /* Exit if already run out */ | |
f694e5d2 | 4400 | if (time_limit > 0 || microsecs) |
6720a7fb | 4401 | { |
f694e5d2 KH |
4402 | EMACS_GET_TIME (timeout); |
4403 | EMACS_SUB_TIME (timeout, end_time, timeout); | |
4404 | if (EMACS_TIME_NEG_P (timeout)) | |
6720a7fb JB |
4405 | break; |
4406 | } | |
4407 | ||
bae8d137 RS |
4408 | /* If our caller will not immediately handle keyboard events, |
4409 | run timer events directly. | |
4410 | (Callers that will immediately read keyboard events | |
4411 | call timer_delay on their own.) */ | |
f854a00b | 4412 | if (! wait_for_cell) |
bae8d137 RS |
4413 | { |
4414 | EMACS_TIME timer_delay; | |
0a65b032 RS |
4415 | int old_timers_run; |
4416 | ||
4417 | retry: | |
4418 | old_timers_run = timers_run; | |
bae8d137 RS |
4419 | timer_delay = timer_check (1); |
4420 | if (timers_run != old_timers_run && do_display) | |
0a65b032 RS |
4421 | { |
4422 | redisplay_preserve_echo_area (); | |
4423 | /* We must retry, since a timer may have requeued itself | |
4424 | and that could alter the time delay. */ | |
4425 | goto retry; | |
4426 | } | |
4427 | ||
f694e5d2 | 4428 | if (! EMACS_TIME_NEG_P (timer_delay) && time_limit != -1) |
bae8d137 RS |
4429 | { |
4430 | EMACS_TIME difference; | |
f694e5d2 | 4431 | EMACS_SUB_TIME (difference, timer_delay, timeout); |
bae8d137 RS |
4432 | if (EMACS_TIME_NEG_P (difference)) |
4433 | { | |
f694e5d2 | 4434 | timeout = timer_delay; |
bae8d137 RS |
4435 | timeout_reduced_for_timers = 1; |
4436 | } | |
4437 | } | |
4438 | } | |
4439 | ||
6720a7fb JB |
4440 | /* Cause C-g and alarm signals to take immediate action, |
4441 | and cause input available signals to zero out timeout. */ | |
f76475ad | 4442 | if (XINT (read_kbd) < 0) |
6720a7fb JB |
4443 | set_waiting_for_input (&timeout); |
4444 | ||
0a65b032 RS |
4445 | /* Wait till there is something to do. */ |
4446 | ||
4447 | if (! XINT (read_kbd) && wait_for_cell == 0) | |
4448 | FD_ZERO (&waitchannels); | |
4449 | else | |
4450 | FD_SET (0, &waitchannels); | |
4451 | ||
ff11dfa1 | 4452 | /* If a frame has been newly mapped and needs updating, |
6720a7fb | 4453 | reprocess its display stuff. */ |
5164ee8e | 4454 | if (frame_garbaged && do_display) |
0a65b032 RS |
4455 | { |
4456 | clear_waiting_for_input (); | |
4457 | redisplay_preserve_echo_area (); | |
4458 | if (XINT (read_kbd) < 0) | |
4459 | set_waiting_for_input (&timeout); | |
4460 | } | |
6720a7fb | 4461 | |
1861b214 RS |
4462 | if (XINT (read_kbd) && detect_input_pending ()) |
4463 | { | |
4464 | nfds = 0; | |
4465 | FD_ZERO (&waitchannels); | |
4466 | } | |
4467 | else | |
4468 | nfds = select (1, &waitchannels, (SELECT_TYPE *)0, (SELECT_TYPE *)0, | |
4469 | &timeout); | |
f694e5d2 KH |
4470 | |
4471 | xerrno = errno; | |
6720a7fb JB |
4472 | |
4473 | /* Make C-g and alarm signals set flags again */ | |
4474 | clear_waiting_for_input (); | |
4475 | ||
4476 | /* If we woke up due to SIGWINCH, actually change size now. */ | |
4477 | do_pending_window_change (); | |
4478 | ||
f694e5d2 KH |
4479 | if (time_limit && nfds == 0 && ! timeout_reduced_for_timers) |
4480 | /* We waited the full specified time, so return now. */ | |
4481 | break; | |
4482 | ||
6720a7fb JB |
4483 | if (nfds == -1) |
4484 | { | |
4485 | /* If the system call was interrupted, then go around the | |
4486 | loop again. */ | |
f694e5d2 | 4487 | if (xerrno == EINTR) |
8db121c4 | 4488 | FD_ZERO (&waitchannels); |
f694e5d2 KH |
4489 | else |
4490 | error ("select error: %s", strerror (xerrno)); | |
6720a7fb JB |
4491 | } |
4492 | #ifdef sun | |
4493 | else if (nfds > 0 && (waitchannels & 1) && interrupt_input) | |
4494 | /* System sometimes fails to deliver SIGIO. */ | |
4495 | kill (getpid (), SIGIO); | |
4496 | #endif | |
7324d660 | 4497 | #ifdef SIGIO |
f76475ad | 4498 | if (XINT (read_kbd) && interrupt_input && (waitchannels & 1)) |
e643c5be | 4499 | kill (getpid (), SIGIO); |
7324d660 | 4500 | #endif |
6720a7fb | 4501 | |
f694e5d2 KH |
4502 | /* Check for keyboard input */ |
4503 | ||
f854a00b | 4504 | if ((XINT (read_kbd) != 0) |
f694e5d2 KH |
4505 | && detect_input_pending_run_timers (do_display)) |
4506 | { | |
4507 | swallow_events (do_display); | |
4508 | if (detect_input_pending_run_timers (do_display)) | |
4509 | break; | |
4510 | } | |
0a65b032 | 4511 | |
f854a00b RS |
4512 | /* If wait_for_cell. check for keyboard input |
4513 | but don't run any timers. | |
4514 | ??? (It seems wrong to me to check for keyboard | |
4515 | input at all when wait_for_cell, but the code | |
4516 | has been this way since July 1994. | |
4517 | Try changing this after version 19.31.) */ | |
4518 | if (wait_for_cell | |
4519 | && detect_input_pending ()) | |
4520 | { | |
4521 | swallow_events (do_display); | |
4522 | if (detect_input_pending ()) | |
4523 | break; | |
4524 | } | |
4525 | ||
0a65b032 RS |
4526 | /* Exit now if the cell we're waiting for became non-nil. */ |
4527 | if (wait_for_cell && ! NILP (*wait_for_cell)) | |
4528 | break; | |
6720a7fb JB |
4529 | } |
4530 | ||
a87b802f JB |
4531 | start_polling (); |
4532 | ||
6720a7fb JB |
4533 | return 0; |
4534 | } | |
4535 | ||
4536 | ||
4537 | DEFUN ("get-buffer-process", Fget_buffer_process, Sget_buffer_process, 1, 1, 0, | |
51ab806a | 4538 | /* Don't confuse make-docfile by having two doc strings for this function. |
312c9964 RS |
4539 | make-docfile does not pay attention to #if, for good reason! */ |
4540 | 0) | |
6720a7fb JB |
4541 | (name) |
4542 | register Lisp_Object name; | |
4543 | { | |
4544 | return Qnil; | |
4545 | } | |
4546 | ||
4547 | /* Kill all processes associated with `buffer'. | |
4548 | If `buffer' is nil, kill all processes. | |
4549 | Since we have no subprocesses, this does nothing. */ | |
4550 | ||
4551 | kill_buffer_processes (buffer) | |
4552 | Lisp_Object buffer; | |
4553 | { | |
4554 | } | |
4555 | ||
4556 | init_process () | |
4557 | { | |
4558 | } | |
4559 | ||
4560 | syms_of_process () | |
4561 | { | |
4562 | defsubr (&Sget_buffer_process); | |
4563 | } | |
4564 | ||
4565 | \f | |
4566 | #endif /* not subprocesses */ |