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d0d6b7c5 | 1 | /* Asynchronous subprocess control for GNU Emacs. |
f8c25f1b | 2 | Copyright (C) 1985, 86, 87, 88, 93, 94, 95 Free Software Foundation, Inc. |
d0d6b7c5 JB |
3 | |
4 | This file is part of GNU Emacs. | |
5 | ||
6 | GNU Emacs is free software; you can redistribute it and/or modify | |
7 | it under the terms of the GNU General Public License as published by | |
1dc77cc3 | 8 | the Free Software Foundation; either version 2, or (at your option) |
d0d6b7c5 JB |
9 | any later version. |
10 | ||
11 | GNU Emacs is distributed in the hope that it will be useful, | |
12 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
14 | GNU General Public License for more details. | |
15 | ||
16 | You should have received a copy of the GNU General Public License | |
17 | along with GNU Emacs; see the file COPYING. If not, write to | |
18 | the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. */ | |
19 | ||
20 | ||
21 | #include <signal.h> | |
22 | ||
18160b98 | 23 | #include <config.h> |
d0d6b7c5 | 24 | |
6720a7fb JB |
25 | /* This file is split into two parts by the following preprocessor |
26 | conditional. The 'then' clause contains all of the support for | |
27 | asynchronous subprocesses. The 'else' clause contains stub | |
28 | versions of some of the asynchronous subprocess routines that are | |
29 | often called elsewhere in Emacs, so we don't have to #ifdef the | |
30 | sections that call them. */ | |
31 | ||
32 | \f | |
d0d6b7c5 | 33 | #ifdef subprocesses |
d0d6b7c5 JB |
34 | |
35 | #include <stdio.h> | |
36 | #include <errno.h> | |
37 | #include <setjmp.h> | |
38 | #include <sys/types.h> /* some typedefs are used in sys/file.h */ | |
39 | #include <sys/file.h> | |
40 | #include <sys/stat.h> | |
93b4f699 RS |
41 | #ifdef HAVE_UNISTD_H |
42 | #include <unistd.h> | |
43 | #endif | |
d0d6b7c5 | 44 | |
e98d950b RS |
45 | #ifdef WINDOWSNT |
46 | #include <stdlib.h> | |
47 | #include <fcntl.h> | |
48 | #endif /* not WINDOWSNT */ | |
49 | ||
d0d6b7c5 JB |
50 | #ifdef HAVE_SOCKETS /* TCP connection support, if kernel can do it */ |
51 | #include <sys/socket.h> | |
52 | #include <netdb.h> | |
53 | #include <netinet/in.h> | |
54 | #include <arpa/inet.h> | |
55 | #endif /* HAVE_SOCKETS */ | |
56 | ||
1d2c16fa RS |
57 | /* TERM is a poor-man's SLIP, used on Linux. */ |
58 | #ifdef TERM | |
59 | #include <client.h> | |
60 | #endif | |
61 | ||
cf32fea0 PR |
62 | /* On some systems, e.g. DGUX, inet_addr returns a 'struct in_addr'. */ |
63 | #ifdef HAVE_BROKEN_INET_ADDR | |
79967d5e RS |
64 | #define IN_ADDR struct in_addr |
65 | #define NUMERIC_ADDR_ERROR (numeric_addr.s_addr == -1) | |
66 | #else | |
67 | #define IN_ADDR unsigned long | |
68 | #define NUMERIC_ADDR_ERROR (numeric_addr == -1) | |
69 | #endif | |
70 | ||
d0d6b7c5 JB |
71 | #if defined(BSD) || defined(STRIDE) |
72 | #include <sys/ioctl.h> | |
0ad77c54 | 73 | #if !defined (O_NDELAY) && defined (HAVE_PTYS) && !defined(USG5) |
d0d6b7c5 JB |
74 | #include <fcntl.h> |
75 | #endif /* HAVE_PTYS and no O_NDELAY */ | |
76 | #endif /* BSD or STRIDE */ | |
d0d6b7c5 | 77 | |
99e3d726 RS |
78 | #ifdef BROKEN_O_NONBLOCK |
79 | #undef O_NONBLOCK | |
80 | #endif /* BROKEN_O_NONBLOCK */ | |
81 | ||
d0d6b7c5 JB |
82 | #ifdef NEED_BSDTTY |
83 | #include <bsdtty.h> | |
84 | #endif | |
85 | ||
d0d6b7c5 JB |
86 | #ifdef IRIS |
87 | #include <sys/sysmacros.h> /* for "minor" */ | |
88 | #endif /* not IRIS */ | |
89 | ||
90 | #include "systime.h" | |
36ebaafa | 91 | #include "systty.h" |
d0d6b7c5 JB |
92 | |
93 | #include "lisp.h" | |
94 | #include "window.h" | |
95 | #include "buffer.h" | |
96 | #include "process.h" | |
97 | #include "termhooks.h" | |
98 | #include "termopts.h" | |
99 | #include "commands.h" | |
1dc77cc3 | 100 | #include "frame.h" |
d0d6b7c5 | 101 | |
dd2281ae | 102 | Lisp_Object Qprocessp; |
d0d6b7c5 | 103 | Lisp_Object Qrun, Qstop, Qsignal, Qopen, Qclosed; |
6545aada | 104 | Lisp_Object Qlast_nonmenu_event; |
d0d6b7c5 JB |
105 | /* Qexit is declared and initialized in eval.c. */ |
106 | ||
107 | /* a process object is a network connection when its childp field is neither | |
108 | Qt nor Qnil but is instead a string (name of foreign host we | |
109 | are connected to + name of port we are connected to) */ | |
110 | ||
111 | #ifdef HAVE_SOCKETS | |
112 | static Lisp_Object stream_process; | |
113 | ||
b5b502d6 | 114 | #define NETCONN_P(p) (GC_STRINGP (XPROCESS (p)->childp)) |
d0d6b7c5 JB |
115 | #else |
116 | #define NETCONN_P(p) 0 | |
117 | #endif /* HAVE_SOCKETS */ | |
118 | ||
119 | /* Define first descriptor number available for subprocesses. */ | |
120 | #ifdef VMS | |
121 | #define FIRST_PROC_DESC 1 | |
122 | #else /* Not VMS */ | |
123 | #define FIRST_PROC_DESC 3 | |
124 | #endif | |
125 | ||
126 | /* Define SIGCHLD as an alias for SIGCLD. There are many conditionals | |
127 | testing SIGCHLD. */ | |
128 | ||
129 | #if !defined (SIGCHLD) && defined (SIGCLD) | |
130 | #define SIGCHLD SIGCLD | |
131 | #endif /* SIGCLD */ | |
132 | ||
133 | #include "syssignal.h" | |
134 | ||
889255b4 | 135 | #include "syswait.h" |
d0d6b7c5 | 136 | |
b062d1fe RM |
137 | extern int errno; |
138 | extern char *strerror (); | |
139 | #ifdef VMS | |
d0d6b7c5 | 140 | extern char *sys_errlist[]; |
b062d1fe | 141 | #endif |
d0d6b7c5 | 142 | |
5f0929a7 RS |
143 | #ifndef HAVE_H_ERRNO |
144 | extern int h_errno; | |
145 | #endif | |
146 | ||
a86928f7 | 147 | #ifndef SYS_SIGLIST_DECLARED |
d0d6b7c5 JB |
148 | #ifndef VMS |
149 | #ifndef BSD4_1 | |
e98d950b | 150 | #ifndef WINDOWSNT |
084fd64a | 151 | #ifndef LINUX |
d0d6b7c5 | 152 | extern char *sys_siglist[]; |
a0e4d3f3 RS |
153 | #endif /* not LINUX */ |
154 | #else /* BSD4_1 */ | |
d0d6b7c5 JB |
155 | char *sys_siglist[] = |
156 | { | |
157 | "bum signal!!", | |
158 | "hangup", | |
159 | "interrupt", | |
160 | "quit", | |
161 | "illegal instruction", | |
162 | "trace trap", | |
163 | "iot instruction", | |
164 | "emt instruction", | |
165 | "floating point exception", | |
166 | "kill", | |
167 | "bus error", | |
168 | "segmentation violation", | |
169 | "bad argument to system call", | |
170 | "write on a pipe with no one to read it", | |
171 | "alarm clock", | |
172 | "software termination signal from kill", | |
173 | "status signal", | |
174 | "sendable stop signal not from tty", | |
175 | "stop signal from tty", | |
176 | "continue a stopped process", | |
177 | "child status has changed", | |
178 | "background read attempted from control tty", | |
179 | "background write attempted from control tty", | |
180 | "input record available at control tty", | |
181 | "exceeded CPU time limit", | |
182 | "exceeded file size limit" | |
183 | }; | |
e98d950b | 184 | #endif /* not WINDOWSNT */ |
d0d6b7c5 JB |
185 | #endif |
186 | #endif /* VMS */ | |
a86928f7 | 187 | #endif /* ! SYS_SIGLIST_DECLARED */ |
d0d6b7c5 | 188 | |
d0d6b7c5 JB |
189 | /* t means use pty, nil means use a pipe, |
190 | maybe other values to come. */ | |
dd2281ae | 191 | static Lisp_Object Vprocess_connection_type; |
d0d6b7c5 JB |
192 | |
193 | #ifdef SKTPAIR | |
194 | #ifndef HAVE_SOCKETS | |
195 | #include <sys/socket.h> | |
196 | #endif | |
197 | #endif /* SKTPAIR */ | |
198 | ||
17d02632 KH |
199 | /* These next two vars are non-static since sysdep.c uses them in the |
200 | emulation of `select'. */ | |
d0d6b7c5 | 201 | /* Number of events of change of status of a process. */ |
17d02632 | 202 | int process_tick; |
d0d6b7c5 | 203 | /* Number of events for which the user or sentinel has been notified. */ |
17d02632 | 204 | int update_tick; |
d0d6b7c5 | 205 | |
5886acf9 | 206 | #include "sysselect.h" |
d0d6b7c5 | 207 | |
44ade2e9 RS |
208 | /* If we support X Windows, turn on the code to poll periodically |
209 | to detect C-g. It isn't actually used when doing interrupt input. */ | |
210 | #ifdef HAVE_X_WINDOWS | |
211 | #define POLL_FOR_INPUT | |
212 | #endif | |
213 | ||
a69281ff | 214 | /* Mask of bits indicating the descriptors that we wait for input on. */ |
d0d6b7c5 | 215 | |
dd2281ae RS |
216 | static SELECT_TYPE input_wait_mask; |
217 | ||
a69281ff RS |
218 | /* Mask that excludes keyboard input descriptor (s). */ |
219 | ||
220 | static SELECT_TYPE non_keyboard_wait_mask; | |
221 | ||
7d0e672e RS |
222 | /* The largest descriptor currently in use for a process object. */ |
223 | static int max_process_desc; | |
224 | ||
a69281ff RS |
225 | /* The largest descriptor currently in use for keyboard input. */ |
226 | static int max_keyboard_desc; | |
d0d6b7c5 | 227 | |
dd2281ae RS |
228 | /* Nonzero means delete a process right away if it exits. */ |
229 | static int delete_exited_processes; | |
d0d6b7c5 JB |
230 | |
231 | /* Indexed by descriptor, gives the process (if any) for that descriptor */ | |
41f3aa98 | 232 | Lisp_Object chan_process[MAXDESC]; |
d0d6b7c5 JB |
233 | |
234 | /* Alist of elements (NAME . PROCESS) */ | |
41f3aa98 | 235 | Lisp_Object Vprocess_alist; |
d0d6b7c5 JB |
236 | |
237 | /* Buffered-ahead input char from process, indexed by channel. | |
238 | -1 means empty (no char is buffered). | |
239 | Used on sys V where the only way to tell if there is any | |
240 | output from the process is to read at least one char. | |
241 | Always -1 on systems that support FIONREAD. */ | |
242 | ||
e98d950b RS |
243 | /* Don't make static; need to access externally. */ |
244 | int proc_buffered_char[MAXDESC]; | |
dd2281ae RS |
245 | |
246 | static Lisp_Object get_process (); | |
93b4f699 RS |
247 | |
248 | /* Maximum number of bytes to send to a pty without an eof. */ | |
249 | static int pty_max_bytes; | |
3b9a3dfa | 250 | |
875e6b94 KH |
251 | #ifdef HAVE_PTYS |
252 | /* The file name of the pty opened by allocate_pty. */ | |
3b9a3dfa RS |
253 | |
254 | static char pty_name[24]; | |
875e6b94 | 255 | #endif |
d0d6b7c5 JB |
256 | \f |
257 | /* Compute the Lisp form of the process status, p->status, from | |
258 | the numeric status that was returned by `wait'. */ | |
259 | ||
f9738840 JB |
260 | Lisp_Object status_convert (); |
261 | ||
d0d6b7c5 JB |
262 | update_status (p) |
263 | struct Lisp_Process *p; | |
264 | { | |
265 | union { int i; WAITTYPE wt; } u; | |
266 | u.i = XFASTINT (p->raw_status_low) + (XFASTINT (p->raw_status_high) << 16); | |
267 | p->status = status_convert (u.wt); | |
268 | p->raw_status_low = Qnil; | |
269 | p->raw_status_high = Qnil; | |
270 | } | |
271 | ||
91d10fa8 | 272 | /* Convert a process status word in Unix format to |
d0d6b7c5 JB |
273 | the list that we use internally. */ |
274 | ||
275 | Lisp_Object | |
276 | status_convert (w) | |
277 | WAITTYPE w; | |
278 | { | |
279 | if (WIFSTOPPED (w)) | |
280 | return Fcons (Qstop, Fcons (make_number (WSTOPSIG (w)), Qnil)); | |
281 | else if (WIFEXITED (w)) | |
282 | return Fcons (Qexit, Fcons (make_number (WRETCODE (w)), | |
283 | WCOREDUMP (w) ? Qt : Qnil)); | |
284 | else if (WIFSIGNALED (w)) | |
285 | return Fcons (Qsignal, Fcons (make_number (WTERMSIG (w)), | |
286 | WCOREDUMP (w) ? Qt : Qnil)); | |
287 | else | |
288 | return Qrun; | |
289 | } | |
290 | ||
291 | /* Given a status-list, extract the three pieces of information | |
292 | and store them individually through the three pointers. */ | |
293 | ||
294 | void | |
295 | decode_status (l, symbol, code, coredump) | |
296 | Lisp_Object l; | |
297 | Lisp_Object *symbol; | |
298 | int *code; | |
299 | int *coredump; | |
300 | { | |
301 | Lisp_Object tem; | |
302 | ||
bcd69aea | 303 | if (SYMBOLP (l)) |
d0d6b7c5 JB |
304 | { |
305 | *symbol = l; | |
306 | *code = 0; | |
307 | *coredump = 0; | |
308 | } | |
309 | else | |
310 | { | |
311 | *symbol = XCONS (l)->car; | |
312 | tem = XCONS (l)->cdr; | |
313 | *code = XFASTINT (XCONS (tem)->car); | |
f9738840 | 314 | tem = XCONS (tem)->cdr; |
d0d6b7c5 JB |
315 | *coredump = !NILP (tem); |
316 | } | |
317 | } | |
318 | ||
319 | /* Return a string describing a process status list. */ | |
320 | ||
321 | Lisp_Object | |
322 | status_message (status) | |
323 | Lisp_Object status; | |
324 | { | |
325 | Lisp_Object symbol; | |
326 | int code, coredump; | |
327 | Lisp_Object string, string2; | |
328 | ||
329 | decode_status (status, &symbol, &code, &coredump); | |
330 | ||
331 | if (EQ (symbol, Qsignal) || EQ (symbol, Qstop)) | |
332 | { | |
b97ad9ea RS |
333 | char *signame = 0; |
334 | if (code < NSIG) | |
335 | { | |
b0310da4 | 336 | #ifndef VMS |
ed0cae05 RS |
337 | /* Cast to suppress warning if the table has const char *. */ |
338 | signame = (char *) sys_siglist[code]; | |
b0310da4 | 339 | #else |
b97ad9ea | 340 | signame = sys_errlist[code]; |
b0310da4 | 341 | #endif |
b97ad9ea RS |
342 | } |
343 | if (signame == 0) | |
344 | signame = "unknown"; | |
345 | string = build_string (signame); | |
d0d6b7c5 JB |
346 | string2 = build_string (coredump ? " (core dumped)\n" : "\n"); |
347 | XSTRING (string)->data[0] = DOWNCASE (XSTRING (string)->data[0]); | |
348 | return concat2 (string, string2); | |
349 | } | |
350 | else if (EQ (symbol, Qexit)) | |
351 | { | |
352 | if (code == 0) | |
353 | return build_string ("finished\n"); | |
f2980264 | 354 | string = Fnumber_to_string (make_number (code)); |
d0d6b7c5 JB |
355 | string2 = build_string (coredump ? " (core dumped)\n" : "\n"); |
356 | return concat2 (build_string ("exited abnormally with code "), | |
357 | concat2 (string, string2)); | |
358 | } | |
359 | else | |
360 | return Fcopy_sequence (Fsymbol_name (symbol)); | |
361 | } | |
362 | \f | |
363 | #ifdef HAVE_PTYS | |
d0d6b7c5 | 364 | |
875e6b94 KH |
365 | /* Open an available pty, returning a file descriptor. |
366 | Return -1 on failure. | |
367 | The file name of the terminal corresponding to the pty | |
368 | is left in the variable pty_name. */ | |
369 | ||
d0d6b7c5 JB |
370 | int |
371 | allocate_pty () | |
372 | { | |
373 | struct stat stb; | |
374 | register c, i; | |
375 | int fd; | |
376 | ||
32676c08 JB |
377 | /* Some systems name their pseudoterminals so that there are gaps in |
378 | the usual sequence - for example, on HP9000/S700 systems, there | |
379 | are no pseudoterminals with names ending in 'f'. So we wait for | |
380 | three failures in a row before deciding that we've reached the | |
381 | end of the ptys. */ | |
382 | int failed_count = 0; | |
383 | ||
d0d6b7c5 JB |
384 | #ifdef PTY_ITERATION |
385 | PTY_ITERATION | |
386 | #else | |
387 | for (c = FIRST_PTY_LETTER; c <= 'z'; c++) | |
388 | for (i = 0; i < 16; i++) | |
389 | #endif | |
390 | { | |
391 | #ifdef PTY_NAME_SPRINTF | |
392 | PTY_NAME_SPRINTF | |
d0d6b7c5 JB |
393 | #else |
394 | sprintf (pty_name, "/dev/pty%c%x", c, i); | |
d0d6b7c5 JB |
395 | #endif /* no PTY_NAME_SPRINTF */ |
396 | ||
4d7c105e RS |
397 | #ifdef PTY_OPEN |
398 | PTY_OPEN; | |
399 | #else /* no PTY_OPEN */ | |
32676c08 JB |
400 | #ifdef IRIS |
401 | /* Unusual IRIS code */ | |
402 | *ptyv = open ("/dev/ptc", O_RDWR | O_NDELAY, 0); | |
403 | if (fd < 0) | |
404 | return -1; | |
405 | if (fstat (fd, &stb) < 0) | |
d0d6b7c5 | 406 | return -1; |
4d7c105e | 407 | #else /* not IRIS */ |
32676c08 JB |
408 | if (stat (pty_name, &stb) < 0) |
409 | { | |
410 | failed_count++; | |
411 | if (failed_count >= 3) | |
412 | return -1; | |
413 | } | |
414 | else | |
415 | failed_count = 0; | |
d0d6b7c5 JB |
416 | #ifdef O_NONBLOCK |
417 | fd = open (pty_name, O_RDWR | O_NONBLOCK, 0); | |
418 | #else | |
419 | fd = open (pty_name, O_RDWR | O_NDELAY, 0); | |
420 | #endif | |
4d7c105e RS |
421 | #endif /* not IRIS */ |
422 | #endif /* no PTY_OPEN */ | |
d0d6b7c5 JB |
423 | |
424 | if (fd >= 0) | |
425 | { | |
426 | /* check to make certain that both sides are available | |
427 | this avoids a nasty yet stupid bug in rlogins */ | |
428 | #ifdef PTY_TTY_NAME_SPRINTF | |
429 | PTY_TTY_NAME_SPRINTF | |
d0d6b7c5 JB |
430 | #else |
431 | sprintf (pty_name, "/dev/tty%c%x", c, i); | |
d0d6b7c5 JB |
432 | #endif /* no PTY_TTY_NAME_SPRINTF */ |
433 | #ifndef UNIPLUS | |
434 | if (access (pty_name, 6) != 0) | |
435 | { | |
436 | close (fd); | |
fad97cbe | 437 | #if !defined(IRIS) && !defined(__sgi) |
d0d6b7c5 JB |
438 | continue; |
439 | #else | |
440 | return -1; | |
441 | #endif /* IRIS */ | |
442 | } | |
443 | #endif /* not UNIPLUS */ | |
444 | setup_pty (fd); | |
445 | return fd; | |
446 | } | |
447 | } | |
448 | return -1; | |
449 | } | |
450 | #endif /* HAVE_PTYS */ | |
451 | \f | |
452 | Lisp_Object | |
453 | make_process (name) | |
454 | Lisp_Object name; | |
455 | { | |
23d6bb9c | 456 | struct Lisp_Vector *vec; |
d0d6b7c5 JB |
457 | register Lisp_Object val, tem, name1; |
458 | register struct Lisp_Process *p; | |
459 | char suffix[10]; | |
460 | register int i; | |
461 | ||
23d6bb9c KH |
462 | vec = allocate_vectorlike ((EMACS_INT) VECSIZE (struct Lisp_Process)); |
463 | for (i = 0; i < VECSIZE (struct Lisp_Process); i++) | |
464 | vec->contents[i] = Qnil; | |
465 | vec->size = VECSIZE (struct Lisp_Process); | |
466 | p = (struct Lisp_Process *)vec; | |
467 | ||
1d056e64 KH |
468 | XSETINT (p->infd, -1); |
469 | XSETINT (p->outfd, -1); | |
22719df2 KH |
470 | XSETFASTINT (p->pid, 0); |
471 | XSETFASTINT (p->tick, 0); | |
472 | XSETFASTINT (p->update_tick, 0); | |
d0d6b7c5 JB |
473 | p->raw_status_low = Qnil; |
474 | p->raw_status_high = Qnil; | |
475 | p->status = Qrun; | |
476 | p->mark = Fmake_marker (); | |
477 | ||
478 | /* If name is already in use, modify it until it is unused. */ | |
479 | ||
480 | name1 = name; | |
481 | for (i = 1; ; i++) | |
482 | { | |
483 | tem = Fget_process (name1); | |
484 | if (NILP (tem)) break; | |
485 | sprintf (suffix, "<%d>", i); | |
486 | name1 = concat2 (name, build_string (suffix)); | |
487 | } | |
488 | name = name1; | |
489 | p->name = name; | |
23d6bb9c | 490 | XSETPROCESS (val, p); |
d0d6b7c5 JB |
491 | Vprocess_alist = Fcons (Fcons (name, val), Vprocess_alist); |
492 | return val; | |
493 | } | |
494 | ||
495 | remove_process (proc) | |
496 | register Lisp_Object proc; | |
497 | { | |
498 | register Lisp_Object pair; | |
499 | ||
500 | pair = Frassq (proc, Vprocess_alist); | |
501 | Vprocess_alist = Fdelq (pair, Vprocess_alist); | |
502 | Fset_marker (XPROCESS (proc)->mark, Qnil, Qnil); | |
503 | ||
504 | deactivate_process (proc); | |
505 | } | |
506 | \f | |
507 | DEFUN ("processp", Fprocessp, Sprocessp, 1, 1, 0, | |
508 | "Return t if OBJECT is a process.") | |
509 | (obj) | |
510 | Lisp_Object obj; | |
511 | { | |
bcd69aea | 512 | return PROCESSP (obj) ? Qt : Qnil; |
d0d6b7c5 JB |
513 | } |
514 | ||
515 | DEFUN ("get-process", Fget_process, Sget_process, 1, 1, 0, | |
516 | "Return the process named NAME, or nil if there is none.") | |
517 | (name) | |
518 | register Lisp_Object name; | |
519 | { | |
bcd69aea | 520 | if (PROCESSP (name)) |
d0d6b7c5 JB |
521 | return name; |
522 | CHECK_STRING (name, 0); | |
523 | return Fcdr (Fassoc (name, Vprocess_alist)); | |
524 | } | |
525 | ||
526 | DEFUN ("get-buffer-process", Fget_buffer_process, Sget_buffer_process, 1, 1, 0, | |
527 | "Return the (or, a) process associated with BUFFER.\n\ | |
528 | BUFFER may be a buffer or the name of one.") | |
529 | (name) | |
530 | register Lisp_Object name; | |
531 | { | |
532 | register Lisp_Object buf, tail, proc; | |
533 | ||
534 | if (NILP (name)) return Qnil; | |
535 | buf = Fget_buffer (name); | |
536 | if (NILP (buf)) return Qnil; | |
537 | ||
538 | for (tail = Vprocess_alist; !NILP (tail); tail = Fcdr (tail)) | |
539 | { | |
540 | proc = Fcdr (Fcar (tail)); | |
bcd69aea | 541 | if (PROCESSP (proc) && EQ (XPROCESS (proc)->buffer, buf)) |
d0d6b7c5 JB |
542 | return proc; |
543 | } | |
544 | return Qnil; | |
545 | } | |
546 | ||
ebb9e16f JB |
547 | /* This is how commands for the user decode process arguments. It |
548 | accepts a process, a process name, a buffer, a buffer name, or nil. | |
549 | Buffers denote the first process in the buffer, and nil denotes the | |
550 | current buffer. */ | |
d0d6b7c5 | 551 | |
77b221b1 | 552 | static Lisp_Object |
d0d6b7c5 JB |
553 | get_process (name) |
554 | register Lisp_Object name; | |
555 | { | |
1619761d KH |
556 | register Lisp_Object proc, obj; |
557 | if (STRINGP (name)) | |
558 | { | |
559 | obj = Fget_process (name); | |
560 | if (NILP (obj)) | |
561 | obj = Fget_buffer (name); | |
562 | if (NILP (obj)) | |
563 | error ("Process %s does not exist", XSTRING (name)->data); | |
564 | } | |
565 | else if (NILP (name)) | |
566 | obj = Fcurrent_buffer (); | |
d0d6b7c5 | 567 | else |
1619761d KH |
568 | obj = name; |
569 | ||
570 | /* Now obj should be either a buffer object or a process object. | |
571 | */ | |
572 | if (BUFFERP (obj)) | |
d0d6b7c5 | 573 | { |
1619761d | 574 | proc = Fget_buffer_process (obj); |
d0d6b7c5 | 575 | if (NILP (proc)) |
1619761d | 576 | error ("Buffer %s has no process", XSTRING (XBUFFER (obj)->name)->data); |
d0d6b7c5 | 577 | } |
d0d6b7c5 | 578 | else |
1619761d KH |
579 | { |
580 | CHECK_PROCESS (obj, 0); | |
581 | proc = obj; | |
582 | } | |
583 | return proc; | |
d0d6b7c5 JB |
584 | } |
585 | ||
586 | DEFUN ("delete-process", Fdelete_process, Sdelete_process, 1, 1, 0, | |
587 | "Delete PROCESS: kill it and forget about it immediately.\n\ | |
ebb9e16f JB |
588 | PROCESS may be a process, a buffer, the name of a process or buffer, or\n\ |
589 | nil, indicating the current buffer's process.") | |
d0d6b7c5 JB |
590 | (proc) |
591 | register Lisp_Object proc; | |
592 | { | |
593 | proc = get_process (proc); | |
594 | XPROCESS (proc)->raw_status_low = Qnil; | |
595 | XPROCESS (proc)->raw_status_high = Qnil; | |
596 | if (NETCONN_P (proc)) | |
597 | { | |
598 | XPROCESS (proc)->status = Fcons (Qexit, Fcons (make_number (0), Qnil)); | |
599 | XSETINT (XPROCESS (proc)->tick, ++process_tick); | |
600 | } | |
6c955bcb | 601 | else if (XINT (XPROCESS (proc)->infd) >= 0) |
d0d6b7c5 JB |
602 | { |
603 | Fkill_process (proc, Qnil); | |
604 | /* Do this now, since remove_process will make sigchld_handler do nothing. */ | |
605 | XPROCESS (proc)->status | |
606 | = Fcons (Qsignal, Fcons (make_number (SIGKILL), Qnil)); | |
607 | XSETINT (XPROCESS (proc)->tick, ++process_tick); | |
608 | status_notify (); | |
609 | } | |
610 | remove_process (proc); | |
611 | return Qnil; | |
612 | } | |
613 | \f | |
614 | DEFUN ("process-status", Fprocess_status, Sprocess_status, 1, 1, 0, | |
615 | "Return the status of PROCESS: a symbol, one of these:\n\ | |
616 | run -- for a process that is running.\n\ | |
617 | stop -- for a process stopped but continuable.\n\ | |
618 | exit -- for a process that has exited.\n\ | |
619 | signal -- for a process that has got a fatal signal.\n\ | |
620 | open -- for a network stream connection that is open.\n\ | |
621 | closed -- for a network stream connection that is closed.\n\ | |
ebb9e16f JB |
622 | nil -- if arg is a process name and no such process exists.\n\ |
623 | PROCESS may be a process, a buffer, the name of a process or buffer, or\n\ | |
624 | nil, indicating the current buffer's process.") | |
d0d6b7c5 JB |
625 | (proc) |
626 | register Lisp_Object proc; | |
627 | { | |
628 | register struct Lisp_Process *p; | |
629 | register Lisp_Object status; | |
343f4114 RS |
630 | |
631 | if (STRINGP (proc)) | |
632 | proc = Fget_process (proc); | |
633 | else | |
634 | proc = get_process (proc); | |
635 | ||
d0d6b7c5 JB |
636 | if (NILP (proc)) |
637 | return proc; | |
343f4114 | 638 | |
d0d6b7c5 JB |
639 | p = XPROCESS (proc); |
640 | if (!NILP (p->raw_status_low)) | |
641 | update_status (p); | |
642 | status = p->status; | |
bcd69aea | 643 | if (CONSP (status)) |
d0d6b7c5 JB |
644 | status = XCONS (status)->car; |
645 | if (NETCONN_P (proc)) | |
646 | { | |
647 | if (EQ (status, Qrun)) | |
648 | status = Qopen; | |
649 | else if (EQ (status, Qexit)) | |
650 | status = Qclosed; | |
651 | } | |
652 | return status; | |
653 | } | |
654 | ||
655 | DEFUN ("process-exit-status", Fprocess_exit_status, Sprocess_exit_status, | |
656 | 1, 1, 0, | |
657 | "Return the exit status of PROCESS or the signal number that killed it.\n\ | |
658 | If PROCESS has not yet exited or died, return 0.") | |
659 | (proc) | |
660 | register Lisp_Object proc; | |
661 | { | |
662 | CHECK_PROCESS (proc, 0); | |
663 | if (!NILP (XPROCESS (proc)->raw_status_low)) | |
664 | update_status (XPROCESS (proc)); | |
bcd69aea | 665 | if (CONSP (XPROCESS (proc)->status)) |
d0d6b7c5 JB |
666 | return XCONS (XCONS (XPROCESS (proc)->status)->cdr)->car; |
667 | return make_number (0); | |
668 | } | |
669 | ||
670 | DEFUN ("process-id", Fprocess_id, Sprocess_id, 1, 1, 0, | |
671 | "Return the process id of PROCESS.\n\ | |
672 | This is the pid of the Unix process which PROCESS uses or talks to.\n\ | |
673 | For a network connection, this value is nil.") | |
674 | (proc) | |
675 | register Lisp_Object proc; | |
676 | { | |
677 | CHECK_PROCESS (proc, 0); | |
678 | return XPROCESS (proc)->pid; | |
679 | } | |
680 | ||
681 | DEFUN ("process-name", Fprocess_name, Sprocess_name, 1, 1, 0, | |
682 | "Return the name of PROCESS, as a string.\n\ | |
683 | This is the name of the program invoked in PROCESS,\n\ | |
684 | possibly modified to make it unique among process names.") | |
685 | (proc) | |
686 | register Lisp_Object proc; | |
687 | { | |
688 | CHECK_PROCESS (proc, 0); | |
689 | return XPROCESS (proc)->name; | |
690 | } | |
691 | ||
692 | DEFUN ("process-command", Fprocess_command, Sprocess_command, 1, 1, 0, | |
693 | "Return the command that was executed to start PROCESS.\n\ | |
694 | This is a list of strings, the first string being the program executed\n\ | |
695 | and the rest of the strings being the arguments given to it.\n\ | |
696 | For a non-child channel, this is nil.") | |
697 | (proc) | |
698 | register Lisp_Object proc; | |
699 | { | |
700 | CHECK_PROCESS (proc, 0); | |
701 | return XPROCESS (proc)->command; | |
702 | } | |
703 | ||
3b9a3dfa RS |
704 | DEFUN ("process-tty-name", Fprocess_tty_name, Sprocess_tty_name, 1, 1, 0, |
705 | "Return the name of the terminal PROCESS uses, or nil if none.\n\ | |
706 | This is the terminal that the process itself reads and writes on,\n\ | |
707 | not the name of the pty that Emacs uses to talk with that terminal.") | |
708 | (proc) | |
709 | register Lisp_Object proc; | |
710 | { | |
711 | CHECK_PROCESS (proc, 0); | |
712 | return XPROCESS (proc)->tty_name; | |
713 | } | |
714 | ||
d0d6b7c5 JB |
715 | DEFUN ("set-process-buffer", Fset_process_buffer, Sset_process_buffer, |
716 | 2, 2, 0, | |
717 | "Set buffer associated with PROCESS to BUFFER (a buffer, or nil).") | |
718 | (proc, buffer) | |
719 | register Lisp_Object proc, buffer; | |
720 | { | |
721 | CHECK_PROCESS (proc, 0); | |
722 | if (!NILP (buffer)) | |
723 | CHECK_BUFFER (buffer, 1); | |
724 | XPROCESS (proc)->buffer = buffer; | |
725 | return buffer; | |
726 | } | |
727 | ||
728 | DEFUN ("process-buffer", Fprocess_buffer, Sprocess_buffer, | |
729 | 1, 1, 0, | |
730 | "Return the buffer PROCESS is associated with.\n\ | |
731 | Output from PROCESS is inserted in this buffer\n\ | |
732 | unless PROCESS has a filter.") | |
733 | (proc) | |
734 | register Lisp_Object proc; | |
735 | { | |
736 | CHECK_PROCESS (proc, 0); | |
737 | return XPROCESS (proc)->buffer; | |
738 | } | |
739 | ||
740 | DEFUN ("process-mark", Fprocess_mark, Sprocess_mark, | |
741 | 1, 1, 0, | |
742 | "Return the marker for the end of the last output from PROCESS.") | |
743 | (proc) | |
744 | register Lisp_Object proc; | |
745 | { | |
746 | CHECK_PROCESS (proc, 0); | |
747 | return XPROCESS (proc)->mark; | |
748 | } | |
749 | ||
750 | DEFUN ("set-process-filter", Fset_process_filter, Sset_process_filter, | |
751 | 2, 2, 0, | |
752 | "Give PROCESS the filter function FILTER; nil means no filter.\n\ | |
20ddfff7 | 753 | t means stop accepting output from the process.\n\ |
d0d6b7c5 JB |
754 | When a process has a filter, each time it does output\n\ |
755 | the entire string of output is passed to the filter.\n\ | |
756 | The filter gets two arguments: the process and the string of output.\n\ | |
757 | If the process has a filter, its buffer is not used for output.") | |
758 | (proc, filter) | |
759 | register Lisp_Object proc, filter; | |
760 | { | |
761 | CHECK_PROCESS (proc, 0); | |
20ddfff7 | 762 | if (EQ (filter, Qt)) |
a69281ff RS |
763 | { |
764 | FD_CLR (XINT (XPROCESS (proc)->infd), &input_wait_mask); | |
765 | FD_CLR (XINT (XPROCESS (proc)->infd), &non_keyboard_wait_mask); | |
766 | } | |
20ddfff7 | 767 | else if (EQ (XPROCESS (proc)->filter, Qt)) |
a69281ff RS |
768 | { |
769 | FD_SET (XINT (XPROCESS (proc)->infd), &input_wait_mask); | |
770 | FD_SET (XINT (XPROCESS (proc)->infd), &non_keyboard_wait_mask); | |
771 | } | |
d0d6b7c5 JB |
772 | XPROCESS (proc)->filter = filter; |
773 | return filter; | |
774 | } | |
775 | ||
776 | DEFUN ("process-filter", Fprocess_filter, Sprocess_filter, | |
777 | 1, 1, 0, | |
778 | "Returns the filter function of PROCESS; nil if none.\n\ | |
779 | See `set-process-filter' for more info on filter functions.") | |
780 | (proc) | |
781 | register Lisp_Object proc; | |
782 | { | |
783 | CHECK_PROCESS (proc, 0); | |
784 | return XPROCESS (proc)->filter; | |
785 | } | |
786 | ||
787 | DEFUN ("set-process-sentinel", Fset_process_sentinel, Sset_process_sentinel, | |
788 | 2, 2, 0, | |
789 | "Give PROCESS the sentinel SENTINEL; nil for none.\n\ | |
790 | The sentinel is called as a function when the process changes state.\n\ | |
791 | It gets two arguments: the process, and a string describing the change.") | |
792 | (proc, sentinel) | |
793 | register Lisp_Object proc, sentinel; | |
794 | { | |
795 | CHECK_PROCESS (proc, 0); | |
796 | XPROCESS (proc)->sentinel = sentinel; | |
797 | return sentinel; | |
798 | } | |
799 | ||
800 | DEFUN ("process-sentinel", Fprocess_sentinel, Sprocess_sentinel, | |
801 | 1, 1, 0, | |
802 | "Return the sentinel of PROCESS; nil if none.\n\ | |
803 | See `set-process-sentinel' for more info on sentinels.") | |
804 | (proc) | |
805 | register Lisp_Object proc; | |
806 | { | |
807 | CHECK_PROCESS (proc, 0); | |
808 | return XPROCESS (proc)->sentinel; | |
809 | } | |
810 | ||
396df322 RS |
811 | DEFUN ("set-process-window-size", Fset_process_window_size, |
812 | Sset_process_window_size, 3, 3, 0, | |
813 | "Tell PROCESS that it has logical window size HEIGHT and WIDTH.") | |
814 | (proc, height, width) | |
815 | register Lisp_Object proc, height, width; | |
816 | { | |
817 | CHECK_PROCESS (proc, 0); | |
818 | CHECK_NATNUM (height, 0); | |
819 | CHECK_NATNUM (width, 0); | |
820 | if (set_window_size (XINT (XPROCESS (proc)->infd), | |
821 | XINT (height), XINT(width)) <= 0) | |
822 | return Qnil; | |
823 | else | |
824 | return Qt; | |
825 | } | |
826 | ||
d0d6b7c5 JB |
827 | DEFUN ("process-kill-without-query", Fprocess_kill_without_query, |
828 | Sprocess_kill_without_query, 1, 2, 0, | |
829 | "Say no query needed if PROCESS is running when Emacs is exited.\n\ | |
f2d2dbfe | 830 | Optional second argument if non-nil says to require a query.\n\ |
d0d6b7c5 JB |
831 | Value is t if a query was formerly required.") |
832 | (proc, value) | |
833 | register Lisp_Object proc, value; | |
834 | { | |
835 | Lisp_Object tem; | |
836 | ||
837 | CHECK_PROCESS (proc, 0); | |
838 | tem = XPROCESS (proc)->kill_without_query; | |
839 | XPROCESS (proc)->kill_without_query = Fnull (value); | |
840 | ||
841 | return Fnull (tem); | |
842 | } | |
312c9964 RS |
843 | |
844 | #if 0 /* Turned off because we don't currently record this info | |
845 | in the process. Perhaps add it. */ | |
846 | DEFUN ("process-connection", Fprocess_connection, Sprocess_connection, 1, 1, 0, | |
847 | "Return the connection type of `PROCESS'.\n\ | |
848 | The value is `nil' for a pipe,\n\ | |
849 | `t' or `pty' for a pty, or `stream' for a socket connection.") | |
850 | (process) | |
851 | Lisp_Object process; | |
852 | { | |
853 | return XPROCESS (process)->type; | |
854 | } | |
855 | #endif | |
d0d6b7c5 JB |
856 | \f |
857 | Lisp_Object | |
858 | list_processes_1 () | |
859 | { | |
860 | register Lisp_Object tail, tem; | |
861 | Lisp_Object proc, minspace, tem1; | |
862 | register struct buffer *old = current_buffer; | |
863 | register struct Lisp_Process *p; | |
864 | register int state; | |
865 | char tembuf[80]; | |
866 | ||
22719df2 | 867 | XSETFASTINT (minspace, 1); |
d0d6b7c5 JB |
868 | |
869 | set_buffer_internal (XBUFFER (Vstandard_output)); | |
870 | Fbuffer_disable_undo (Vstandard_output); | |
871 | ||
872 | current_buffer->truncate_lines = Qt; | |
873 | ||
874 | write_string ("\ | |
a9fde32e KH |
875 | Proc Status Buffer Tty Command\n\ |
876 | ---- ------ ------ --- -------\n", -1); | |
d0d6b7c5 JB |
877 | |
878 | for (tail = Vprocess_alist; !NILP (tail); tail = Fcdr (tail)) | |
879 | { | |
880 | Lisp_Object symbol; | |
881 | ||
882 | proc = Fcdr (Fcar (tail)); | |
883 | p = XPROCESS (proc); | |
884 | if (NILP (p->childp)) | |
885 | continue; | |
886 | ||
887 | Finsert (1, &p->name); | |
888 | Findent_to (make_number (13), minspace); | |
889 | ||
890 | if (!NILP (p->raw_status_low)) | |
891 | update_status (p); | |
892 | symbol = p->status; | |
bcd69aea | 893 | if (CONSP (p->status)) |
d0d6b7c5 JB |
894 | symbol = XCONS (p->status)->car; |
895 | ||
896 | ||
897 | if (EQ (symbol, Qsignal)) | |
898 | { | |
899 | Lisp_Object tem; | |
900 | tem = Fcar (Fcdr (p->status)); | |
901 | #ifdef VMS | |
902 | if (XINT (tem) < NSIG) | |
b0310da4 | 903 | write_string (sys_errlist [XINT (tem)], -1); |
d0d6b7c5 JB |
904 | else |
905 | #endif | |
906 | Fprinc (symbol, Qnil); | |
907 | } | |
908 | else if (NETCONN_P (proc)) | |
909 | { | |
910 | if (EQ (symbol, Qrun)) | |
911 | write_string ("open", -1); | |
912 | else if (EQ (symbol, Qexit)) | |
913 | write_string ("closed", -1); | |
914 | else | |
915 | Fprinc (symbol, Qnil); | |
916 | } | |
917 | else | |
918 | Fprinc (symbol, Qnil); | |
919 | ||
920 | if (EQ (symbol, Qexit)) | |
921 | { | |
922 | Lisp_Object tem; | |
923 | tem = Fcar (Fcdr (p->status)); | |
924 | if (XFASTINT (tem)) | |
925 | { | |
926 | sprintf (tembuf, " %d", XFASTINT (tem)); | |
927 | write_string (tembuf, -1); | |
928 | } | |
929 | } | |
930 | ||
931 | if (EQ (symbol, Qsignal) || EQ (symbol, Qexit)) | |
932 | remove_process (proc); | |
933 | ||
934 | Findent_to (make_number (22), minspace); | |
935 | if (NILP (p->buffer)) | |
936 | insert_string ("(none)"); | |
937 | else if (NILP (XBUFFER (p->buffer)->name)) | |
938 | insert_string ("(Killed)"); | |
939 | else | |
940 | Finsert (1, &XBUFFER (p->buffer)->name); | |
941 | ||
942 | Findent_to (make_number (37), minspace); | |
943 | ||
a9fde32e KH |
944 | if (STRINGP (p->tty_name)) |
945 | Finsert (1, &p->tty_name); | |
946 | else | |
947 | insert_string ("(none)"); | |
948 | ||
949 | Findent_to (make_number (49), minspace); | |
950 | ||
d0d6b7c5 JB |
951 | if (NETCONN_P (proc)) |
952 | { | |
953 | sprintf (tembuf, "(network stream connection to %s)\n", | |
954 | XSTRING (p->childp)->data); | |
955 | insert_string (tembuf); | |
956 | } | |
957 | else | |
958 | { | |
959 | tem = p->command; | |
960 | while (1) | |
961 | { | |
962 | tem1 = Fcar (tem); | |
963 | Finsert (1, &tem1); | |
964 | tem = Fcdr (tem); | |
965 | if (NILP (tem)) | |
966 | break; | |
967 | insert_string (" "); | |
968 | } | |
969 | insert_string ("\n"); | |
970 | } | |
971 | } | |
972 | return Qnil; | |
973 | } | |
974 | ||
975 | DEFUN ("list-processes", Flist_processes, Slist_processes, 0, 0, "", | |
976 | "Display a list of all processes.\n\ | |
977 | \(Any processes listed as Exited or Signaled are actually eliminated\n\ | |
978 | after the listing is made.)") | |
979 | () | |
980 | { | |
981 | internal_with_output_to_temp_buffer ("*Process List*", | |
982 | list_processes_1, Qnil); | |
983 | return Qnil; | |
984 | } | |
985 | ||
986 | DEFUN ("process-list", Fprocess_list, Sprocess_list, 0, 0, 0, | |
987 | "Return a list of all processes.") | |
988 | () | |
989 | { | |
990 | return Fmapcar (Qcdr, Vprocess_alist); | |
991 | } | |
992 | \f | |
b0310da4 JB |
993 | /* Starting asynchronous inferior processes. */ |
994 | ||
995 | static Lisp_Object start_process_unwind (); | |
996 | ||
d0d6b7c5 JB |
997 | DEFUN ("start-process", Fstart_process, Sstart_process, 3, MANY, 0, |
998 | "Start a program in a subprocess. Return the process object for it.\n\ | |
999 | Args are NAME BUFFER PROGRAM &rest PROGRAM-ARGS\n\ | |
1000 | NAME is name for process. It is modified if necessary to make it unique.\n\ | |
1001 | BUFFER is the buffer or (buffer-name) to associate with the process.\n\ | |
1002 | Process output goes at end of that buffer, unless you specify\n\ | |
1003 | an output stream or filter function to handle the output.\n\ | |
1004 | BUFFER may be also nil, meaning that this process is not associated\n\ | |
1005 | with any buffer\n\ | |
1006 | Third arg is program file name. It is searched for as in the shell.\n\ | |
1007 | Remaining arguments are strings to give program as arguments.") | |
1008 | (nargs, args) | |
1009 | int nargs; | |
1010 | register Lisp_Object *args; | |
1011 | { | |
1e30af70 | 1012 | Lisp_Object buffer, name, program, proc, current_dir, tem; |
d0d6b7c5 JB |
1013 | #ifdef VMS |
1014 | register unsigned char *new_argv; | |
1015 | int len; | |
1016 | #else | |
1017 | register unsigned char **new_argv; | |
1018 | #endif | |
1019 | register int i; | |
b0310da4 | 1020 | int count = specpdl_ptr - specpdl; |
d0d6b7c5 JB |
1021 | |
1022 | buffer = args[1]; | |
1023 | if (!NILP (buffer)) | |
1024 | buffer = Fget_buffer_create (buffer); | |
1025 | ||
1e30af70 JB |
1026 | /* Make sure that the child will be able to chdir to the current |
1027 | buffer's current directory, or its unhandled equivalent. We | |
1028 | can't just have the child check for an error when it does the | |
1029 | chdir, since it's in a vfork. | |
1030 | ||
1031 | We have to GCPRO around this because Fexpand_file_name and | |
1032 | Funhandled_file_name_directory might call a file name handling | |
1033 | function. The argument list is protected by the caller, so all | |
1034 | we really have to worry about is buffer. */ | |
1035 | { | |
1036 | struct gcpro gcpro1, gcpro2; | |
1037 | ||
1038 | current_dir = current_buffer->directory; | |
1039 | ||
1040 | GCPRO2 (buffer, current_dir); | |
1041 | ||
7af71e17 RS |
1042 | current_dir |
1043 | = expand_and_dir_to_file (Funhandled_file_name_directory (current_dir), | |
1044 | Qnil); | |
1e30af70 JB |
1045 | if (NILP (Ffile_accessible_directory_p (current_dir))) |
1046 | report_file_error ("Setting current directory", | |
1047 | Fcons (current_buffer->directory, Qnil)); | |
1048 | ||
1049 | UNGCPRO; | |
1050 | } | |
1051 | ||
d0d6b7c5 JB |
1052 | name = args[0]; |
1053 | CHECK_STRING (name, 0); | |
1054 | ||
1055 | program = args[2]; | |
1056 | ||
1057 | CHECK_STRING (program, 2); | |
1058 | ||
1059 | #ifdef VMS | |
1060 | /* Make a one member argv with all args concatenated | |
1061 | together separated by a blank. */ | |
1062 | len = XSTRING (program)->size + 2; | |
1063 | for (i = 3; i < nargs; i++) | |
1064 | { | |
1065 | tem = args[i]; | |
1066 | CHECK_STRING (tem, i); | |
1067 | len += XSTRING (tem)->size + 1; /* count the blank */ | |
1068 | } | |
1069 | new_argv = (unsigned char *) alloca (len); | |
1070 | strcpy (new_argv, XSTRING (program)->data); | |
1071 | for (i = 3; i < nargs; i++) | |
1072 | { | |
1073 | tem = args[i]; | |
1074 | CHECK_STRING (tem, i); | |
1075 | strcat (new_argv, " "); | |
1076 | strcat (new_argv, XSTRING (tem)->data); | |
1077 | } | |
b0310da4 JB |
1078 | /* Need to add code here to check for program existence on VMS */ |
1079 | ||
d0d6b7c5 JB |
1080 | #else /* not VMS */ |
1081 | new_argv = (unsigned char **) alloca ((nargs - 1) * sizeof (char *)); | |
1082 | ||
d0d6b7c5 | 1083 | /* If program file name is not absolute, search our path for it */ |
e98d950b RS |
1084 | if (!IS_DIRECTORY_SEP (XSTRING (program)->data[0]) |
1085 | && !(XSTRING (program)->size > 1 | |
1086 | && IS_DEVICE_SEP (XSTRING (program)->data[1]))) | |
d0d6b7c5 | 1087 | { |
3b639868 KH |
1088 | struct gcpro gcpro1, gcpro2, gcpro3, gcpro4; |
1089 | ||
d0d6b7c5 | 1090 | tem = Qnil; |
3b639868 | 1091 | GCPRO4 (name, program, buffer, current_dir); |
5437e9f9 | 1092 | openp (Vexec_path, program, EXEC_SUFFIXES, &tem, 1); |
3b639868 | 1093 | UNGCPRO; |
d0d6b7c5 JB |
1094 | if (NILP (tem)) |
1095 | report_file_error ("Searching for program", Fcons (program, Qnil)); | |
1096 | new_argv[0] = XSTRING (tem)->data; | |
1097 | } | |
3b639868 KH |
1098 | else |
1099 | new_argv[0] = XSTRING (program)->data; | |
1100 | ||
1101 | for (i = 3; i < nargs; i++) | |
1102 | { | |
1103 | tem = args[i]; | |
1104 | CHECK_STRING (tem, i); | |
1105 | new_argv[i - 2] = XSTRING (tem)->data; | |
1106 | } | |
1107 | new_argv[i - 2] = 0; | |
d0d6b7c5 JB |
1108 | #endif /* not VMS */ |
1109 | ||
1110 | proc = make_process (name); | |
b0310da4 JB |
1111 | /* If an error occurs and we can't start the process, we want to |
1112 | remove it from the process list. This means that each error | |
1113 | check in create_process doesn't need to call remove_process | |
1114 | itself; it's all taken care of here. */ | |
1115 | record_unwind_protect (start_process_unwind, proc); | |
d0d6b7c5 JB |
1116 | |
1117 | XPROCESS (proc)->childp = Qt; | |
1118 | XPROCESS (proc)->command_channel_p = Qnil; | |
1119 | XPROCESS (proc)->buffer = buffer; | |
1120 | XPROCESS (proc)->sentinel = Qnil; | |
1121 | XPROCESS (proc)->filter = Qnil; | |
1122 | XPROCESS (proc)->command = Flist (nargs - 2, args + 2); | |
1123 | ||
7af71e17 RS |
1124 | /* Make the process marker point into the process buffer (if any). */ |
1125 | if (!NILP (buffer)) | |
1126 | Fset_marker (XPROCESS (proc)->mark, | |
1127 | make_number (BUF_ZV (XBUFFER (buffer))), buffer); | |
1128 | ||
1e30af70 | 1129 | create_process (proc, new_argv, current_dir); |
d0d6b7c5 | 1130 | |
b0310da4 | 1131 | return unbind_to (count, proc); |
d0d6b7c5 JB |
1132 | } |
1133 | ||
b0310da4 JB |
1134 | /* This function is the unwind_protect form for Fstart_process. If |
1135 | PROC doesn't have its pid set, then we know someone has signalled | |
1136 | an error and the process wasn't started successfully, so we should | |
1137 | remove it from the process list. */ | |
1138 | static Lisp_Object | |
1139 | start_process_unwind (proc) | |
1140 | Lisp_Object proc; | |
1141 | { | |
bcd69aea | 1142 | if (!PROCESSP (proc)) |
b0310da4 JB |
1143 | abort (); |
1144 | ||
1145 | /* Was PROC started successfully? */ | |
188d6c4e | 1146 | if (XINT (XPROCESS (proc)->pid) <= 0) |
b0310da4 JB |
1147 | remove_process (proc); |
1148 | ||
1149 | return Qnil; | |
1150 | } | |
1151 | ||
1152 | ||
d0d6b7c5 JB |
1153 | SIGTYPE |
1154 | create_process_1 (signo) | |
1155 | int signo; | |
1156 | { | |
1157 | #ifdef USG | |
1158 | /* USG systems forget handlers when they are used; | |
1159 | must reestablish each time */ | |
1160 | signal (signo, create_process_1); | |
1161 | #endif /* USG */ | |
1162 | } | |
1163 | ||
1164 | #if 0 /* This doesn't work; see the note before sigchld_handler. */ | |
1165 | #ifdef USG | |
1166 | #ifdef SIGCHLD | |
1167 | /* Mimic blocking of signals on system V, which doesn't really have it. */ | |
1168 | ||
1169 | /* Nonzero means we got a SIGCHLD when it was supposed to be blocked. */ | |
1170 | int sigchld_deferred; | |
1171 | ||
1172 | SIGTYPE | |
1173 | create_process_sigchld () | |
1174 | { | |
1175 | signal (SIGCHLD, create_process_sigchld); | |
1176 | ||
1177 | sigchld_deferred = 1; | |
1178 | } | |
1179 | #endif | |
1180 | #endif | |
1181 | #endif | |
1182 | ||
1183 | #ifndef VMS /* VMS version of this function is in vmsproc.c. */ | |
1e30af70 | 1184 | create_process (process, new_argv, current_dir) |
d0d6b7c5 JB |
1185 | Lisp_Object process; |
1186 | char **new_argv; | |
1e30af70 | 1187 | Lisp_Object current_dir; |
d0d6b7c5 JB |
1188 | { |
1189 | int pid, inchannel, outchannel, forkin, forkout; | |
1190 | int sv[2]; | |
1191 | #ifdef SIGCHLD | |
1192 | SIGTYPE (*sigchld)(); | |
1193 | #endif | |
1194 | int pty_flag = 0; | |
d0d6b7c5 JB |
1195 | extern char **environ; |
1196 | ||
d0d6b7c5 JB |
1197 | inchannel = outchannel = -1; |
1198 | ||
1199 | #ifdef HAVE_PTYS | |
fe45da4e | 1200 | if (!NILP (Vprocess_connection_type)) |
d0d6b7c5 JB |
1201 | outchannel = inchannel = allocate_pty (); |
1202 | ||
d0d6b7c5 JB |
1203 | if (inchannel >= 0) |
1204 | { | |
1205 | #ifndef USG | |
1206 | /* On USG systems it does not work to open the pty's tty here | |
1207 | and then close and reopen it in the child. */ | |
1208 | #ifdef O_NOCTTY | |
1209 | /* Don't let this terminal become our controlling terminal | |
1210 | (in case we don't have one). */ | |
1211 | forkout = forkin = open (pty_name, O_RDWR | O_NOCTTY, 0); | |
1212 | #else | |
1213 | forkout = forkin = open (pty_name, O_RDWR, 0); | |
1214 | #endif | |
1215 | if (forkin < 0) | |
1216 | report_file_error ("Opening pty", Qnil); | |
1217 | #else | |
1218 | forkin = forkout = -1; | |
1219 | #endif /* not USG */ | |
1220 | pty_flag = 1; | |
1221 | } | |
1222 | else | |
1223 | #endif /* HAVE_PTYS */ | |
1224 | #ifdef SKTPAIR | |
1225 | { | |
1226 | if (socketpair (AF_UNIX, SOCK_STREAM, 0, sv) < 0) | |
1227 | report_file_error ("Opening socketpair", Qnil); | |
1228 | outchannel = inchannel = sv[0]; | |
1229 | forkout = forkin = sv[1]; | |
1230 | } | |
1231 | #else /* not SKTPAIR */ | |
1232 | { | |
e98d950b RS |
1233 | #ifdef WINDOWSNT |
1234 | pipe_with_inherited_out (sv); | |
1235 | inchannel = sv[0]; | |
1236 | forkout = sv[1]; | |
1237 | ||
1238 | pipe_with_inherited_in (sv); | |
1239 | forkin = sv[0]; | |
1240 | outchannel = sv[1]; | |
1241 | #else /* not WINDOWSNT */ | |
d0d6b7c5 JB |
1242 | pipe (sv); |
1243 | inchannel = sv[0]; | |
1244 | forkout = sv[1]; | |
1245 | pipe (sv); | |
1246 | outchannel = sv[1]; | |
1247 | forkin = sv[0]; | |
e98d950b | 1248 | #endif /* not WINDOWSNT */ |
d0d6b7c5 JB |
1249 | } |
1250 | #endif /* not SKTPAIR */ | |
1251 | ||
1252 | #if 0 | |
1253 | /* Replaced by close_process_descs */ | |
1254 | set_exclusive_use (inchannel); | |
1255 | set_exclusive_use (outchannel); | |
1256 | #endif | |
1257 | ||
1258 | /* Stride people say it's a mystery why this is needed | |
1259 | as well as the O_NDELAY, but that it fails without this. */ | |
1260 | #if defined (STRIDE) || (defined (pfa) && defined (HAVE_PTYS)) | |
1261 | { | |
1262 | int one = 1; | |
1263 | ioctl (inchannel, FIONBIO, &one); | |
1264 | } | |
1265 | #endif | |
1266 | ||
1267 | #ifdef O_NONBLOCK | |
1268 | fcntl (inchannel, F_SETFL, O_NONBLOCK); | |
1269 | #else | |
1270 | #ifdef O_NDELAY | |
1271 | fcntl (inchannel, F_SETFL, O_NDELAY); | |
1272 | #endif | |
1273 | #endif | |
1274 | ||
1275 | /* Record this as an active process, with its channels. | |
1276 | As a result, child_setup will close Emacs's side of the pipes. */ | |
1277 | chan_process[inchannel] = process; | |
1d056e64 KH |
1278 | XSETINT (XPROCESS (process)->infd, inchannel); |
1279 | XSETINT (XPROCESS (process)->outfd, outchannel); | |
d0d6b7c5 JB |
1280 | /* Record the tty descriptor used in the subprocess. */ |
1281 | if (forkin < 0) | |
1282 | XPROCESS (process)->subtty = Qnil; | |
1283 | else | |
22719df2 | 1284 | XSETFASTINT (XPROCESS (process)->subtty, forkin); |
d0d6b7c5 JB |
1285 | XPROCESS (process)->pty_flag = (pty_flag ? Qt : Qnil); |
1286 | XPROCESS (process)->status = Qrun; | |
1287 | ||
1288 | /* Delay interrupts until we have a chance to store | |
1289 | the new fork's pid in its process structure */ | |
1290 | #ifdef SIGCHLD | |
1291 | #ifdef BSD4_1 | |
1292 | sighold (SIGCHLD); | |
1293 | #else /* not BSD4_1 */ | |
1294 | #if defined (BSD) || defined (UNIPLUS) || defined (HPUX) | |
1295 | sigsetmask (sigmask (SIGCHLD)); | |
1296 | #else /* ordinary USG */ | |
1297 | #if 0 | |
1298 | sigchld_deferred = 0; | |
1299 | sigchld = signal (SIGCHLD, create_process_sigchld); | |
1300 | #endif | |
1301 | #endif /* ordinary USG */ | |
1302 | #endif /* not BSD4_1 */ | |
1303 | #endif /* SIGCHLD */ | |
1304 | ||
3081bf8d | 1305 | FD_SET (inchannel, &input_wait_mask); |
a69281ff | 1306 | FD_SET (inchannel, &non_keyboard_wait_mask); |
3081bf8d KH |
1307 | if (inchannel > max_process_desc) |
1308 | max_process_desc = inchannel; | |
1309 | ||
d0d6b7c5 JB |
1310 | /* Until we store the proper pid, enable sigchld_handler |
1311 | to recognize an unknown pid as standing for this process. | |
1312 | It is very important not to let this `marker' value stay | |
1313 | in the table after this function has returned; if it does | |
1314 | it might cause call-process to hang and subsequent asynchronous | |
1315 | processes to get their return values scrambled. */ | |
1316 | XSETINT (XPROCESS (process)->pid, -1); | |
1317 | ||
1318 | { | |
1319 | /* child_setup must clobber environ on systems with true vfork. | |
1320 | Protect it from permanent change. */ | |
1321 | char **save_environ = environ; | |
1322 | ||
e98d950b | 1323 | #ifndef WINDOWSNT |
d0d6b7c5 JB |
1324 | pid = vfork (); |
1325 | if (pid == 0) | |
e98d950b | 1326 | #endif /* not WINDOWSNT */ |
d0d6b7c5 JB |
1327 | { |
1328 | int xforkin = forkin; | |
1329 | int xforkout = forkout; | |
1330 | ||
1331 | #if 0 /* This was probably a mistake--it duplicates code later on, | |
1332 | but fails to handle all the cases. */ | |
1333 | /* Make sure SIGCHLD is not blocked in the child. */ | |
1334 | sigsetmask (SIGEMPTYMASK); | |
1335 | #endif | |
1336 | ||
1337 | /* Make the pty be the controlling terminal of the process. */ | |
1338 | #ifdef HAVE_PTYS | |
1339 | /* First, disconnect its current controlling terminal. */ | |
1340 | #ifdef HAVE_SETSID | |
7ce48618 RS |
1341 | /* We tried doing setsid only if pty_flag, but it caused |
1342 | process_set_signal to fail on SGI when using a pipe. */ | |
1343 | setsid (); | |
ce4c9c90 | 1344 | /* Make the pty's terminal the controlling terminal. */ |
084fd64a | 1345 | if (pty_flag) |
39e9ebcd | 1346 | { |
39e9ebcd RS |
1347 | #ifdef TIOCSCTTY |
1348 | /* We ignore the return value | |
1349 | because faith@cs.unc.edu says that is necessary on Linux. */ | |
1350 | ioctl (xforkin, TIOCSCTTY, 0); | |
ce4c9c90 | 1351 | #endif |
39e9ebcd | 1352 | } |
d0d6b7c5 | 1353 | #else /* not HAVE_SETSID */ |
c14e53a4 | 1354 | #ifdef USG |
000ab717 | 1355 | /* It's very important to call setpgrp here and no time |
d0d6b7c5 JB |
1356 | afterwards. Otherwise, we lose our controlling tty which |
1357 | is set when we open the pty. */ | |
1358 | setpgrp (); | |
1359 | #endif /* USG */ | |
1360 | #endif /* not HAVE_SETSID */ | |
9bcf8ec6 KH |
1361 | #if defined (HAVE_TERMIOS) && defined (LDISC1) |
1362 | if (pty_flag && xforkin >= 0) | |
1363 | { | |
1364 | struct termios t; | |
1365 | tcgetattr (xforkin, &t); | |
1366 | t.c_lflag = LDISC1; | |
1367 | if (tcsetattr (xforkin, TCSANOW, &t) < 0) | |
1368 | write (1, "create_process/tcsetattr LDISC1 failed\n", 39); | |
1369 | } | |
1370 | #else | |
aafadd9f | 1371 | #if defined (NTTYDISC) && defined (TIOCSETD) |
ff773a4e | 1372 | if (pty_flag && xforkin >= 0) |
afc549fd RS |
1373 | { |
1374 | /* Use new line discipline. */ | |
1375 | int ldisc = NTTYDISC; | |
4458f555 | 1376 | ioctl (xforkin, TIOCSETD, &ldisc); |
afc549fd | 1377 | } |
000ab717 | 1378 | #endif |
9bcf8ec6 | 1379 | #endif |
d0d6b7c5 JB |
1380 | #ifdef TIOCNOTTY |
1381 | /* In 4.3BSD, the TIOCSPGRP bug has been fixed, and now you | |
1382 | can do TIOCSPGRP only to the process's controlling tty. */ | |
1383 | if (pty_flag) | |
1384 | { | |
1385 | /* I wonder: would just ioctl (0, TIOCNOTTY, 0) work here? | |
1386 | I can't test it since I don't have 4.3. */ | |
1387 | int j = open ("/dev/tty", O_RDWR, 0); | |
1388 | ioctl (j, TIOCNOTTY, 0); | |
1389 | close (j); | |
5a570e37 | 1390 | #ifndef USG |
d0d6b7c5 JB |
1391 | /* In order to get a controlling terminal on some versions |
1392 | of BSD, it is necessary to put the process in pgrp 0 | |
1393 | before it opens the terminal. */ | |
3ea1d291 RS |
1394 | #ifdef OSF1 |
1395 | setpgid (0, 0); | |
1396 | #else | |
d0d6b7c5 | 1397 | setpgrp (0, 0); |
3ea1d291 | 1398 | #endif |
d0d6b7c5 JB |
1399 | #endif |
1400 | } | |
1401 | #endif /* TIOCNOTTY */ | |
1402 | ||
1403 | #if !defined (RTU) && !defined (UNIPLUS) | |
1404 | /*** There is a suggestion that this ought to be a | |
1405 | conditional on TIOCSPGRP. */ | |
1406 | /* Now close the pty (if we had it open) and reopen it. | |
1407 | This makes the pty the controlling terminal of the subprocess. */ | |
1408 | if (pty_flag) | |
1409 | { | |
99e3d726 RS |
1410 | #ifdef SET_CHILD_PTY_PGRP |
1411 | int pgrp = getpid (); | |
1412 | #endif | |
1413 | ||
d0d6b7c5 JB |
1414 | /* I wonder if close (open (pty_name, ...)) would work? */ |
1415 | if (xforkin >= 0) | |
1416 | close (xforkin); | |
1417 | xforkout = xforkin = open (pty_name, O_RDWR, 0); | |
1418 | ||
4aa54ba8 RS |
1419 | if (xforkin < 0) |
1420 | { | |
1421 | write (1, "Couldn't open the pty terminal ", 31); | |
1422 | write (1, pty_name, strlen (pty_name)); | |
1423 | write (1, "\n", 1); | |
1424 | _exit (1); | |
1425 | } | |
1426 | ||
99e3d726 RS |
1427 | #ifdef SET_CHILD_PTY_PGRP |
1428 | ioctl (xforkin, TIOCSPGRP, &pgrp); | |
1429 | ioctl (xforkout, TIOCSPGRP, &pgrp); | |
1430 | #endif | |
d0d6b7c5 JB |
1431 | } |
1432 | #endif /* not UNIPLUS and not RTU */ | |
1433 | #ifdef SETUP_SLAVE_PTY | |
13a72104 RS |
1434 | if (pty_flag) |
1435 | { | |
1436 | SETUP_SLAVE_PTY; | |
1437 | } | |
d0d6b7c5 JB |
1438 | #endif /* SETUP_SLAVE_PTY */ |
1439 | #ifdef AIX | |
1440 | /* On AIX, we've disabled SIGHUP above once we start a child on a pty. | |
1441 | Now reenable it in the child, so it will die when we want it to. */ | |
1442 | if (pty_flag) | |
1443 | signal (SIGHUP, SIG_DFL); | |
1444 | #endif | |
1445 | #endif /* HAVE_PTYS */ | |
1446 | ||
1447 | #ifdef SIGCHLD | |
1448 | #ifdef BSD4_1 | |
1449 | sigrelse (SIGCHLD); | |
1450 | #else /* not BSD4_1 */ | |
1451 | #if defined (BSD) || defined (UNIPLUS) || defined (HPUX) | |
1452 | sigsetmask (SIGEMPTYMASK); | |
1453 | #else /* ordinary USG */ | |
63528b78 | 1454 | #if 0 |
d0d6b7c5 | 1455 | signal (SIGCHLD, sigchld); |
63528b78 | 1456 | #endif |
d0d6b7c5 JB |
1457 | #endif /* ordinary USG */ |
1458 | #endif /* not BSD4_1 */ | |
1459 | #endif /* SIGCHLD */ | |
1460 | ||
5e7e1da2 RS |
1461 | signal (SIGINT, SIG_DFL); |
1462 | signal (SIGQUIT, SIG_DFL); | |
1463 | ||
ab01d0a8 RS |
1464 | if (pty_flag) |
1465 | child_setup_tty (xforkout); | |
e98d950b RS |
1466 | #ifdef WINDOWSNT |
1467 | pid = child_setup (xforkin, xforkout, xforkout, | |
1468 | new_argv, 1, current_dir); | |
1469 | #else /* not WINDOWSNT */ | |
d0d6b7c5 | 1470 | child_setup (xforkin, xforkout, xforkout, |
e065a56e | 1471 | new_argv, 1, current_dir); |
e98d950b | 1472 | #endif /* not WINDOWSNT */ |
d0d6b7c5 JB |
1473 | } |
1474 | environ = save_environ; | |
1475 | } | |
1476 | ||
1477 | if (pid < 0) | |
6311cf58 RS |
1478 | { |
1479 | if (forkin >= 0) | |
1480 | close (forkin); | |
1481 | if (forkin != forkout && forkout >= 0) | |
1482 | close (forkout); | |
1483 | report_file_error ("Doing vfork", Qnil); | |
1484 | } | |
b0310da4 | 1485 | |
22719df2 | 1486 | XSETFASTINT (XPROCESS (process)->pid, pid); |
d0d6b7c5 | 1487 | |
e98d950b RS |
1488 | #ifdef WINDOWSNT |
1489 | register_child (pid, inchannel); | |
1490 | #endif /* WINDOWSNT */ | |
1491 | ||
d0d6b7c5 JB |
1492 | /* If the subfork execv fails, and it exits, |
1493 | this close hangs. I don't know why. | |
1494 | So have an interrupt jar it loose. */ | |
1495 | stop_polling (); | |
1496 | signal (SIGALRM, create_process_1); | |
1497 | alarm (1); | |
99e3d726 RS |
1498 | XPROCESS (process)->subtty = Qnil; |
1499 | if (forkin >= 0) | |
1500 | close (forkin); | |
d0d6b7c5 JB |
1501 | alarm (0); |
1502 | start_polling (); | |
1503 | if (forkin != forkout && forkout >= 0) | |
1504 | close (forkout); | |
1505 | ||
875e6b94 KH |
1506 | #ifdef HAVE_PTYS |
1507 | if (pty_flag) | |
1508 | XPROCESS (process)->tty_name = build_string (pty_name); | |
1509 | else | |
1510 | #endif | |
1511 | XPROCESS (process)->tty_name = Qnil; | |
3b9a3dfa | 1512 | |
d0d6b7c5 JB |
1513 | #ifdef SIGCHLD |
1514 | #ifdef BSD4_1 | |
1515 | sigrelse (SIGCHLD); | |
1516 | #else /* not BSD4_1 */ | |
1517 | #if defined (BSD) || defined (UNIPLUS) || defined (HPUX) | |
1518 | sigsetmask (SIGEMPTYMASK); | |
1519 | #else /* ordinary USG */ | |
1520 | #if 0 | |
1521 | signal (SIGCHLD, sigchld); | |
1522 | /* Now really handle any of these signals | |
1523 | that came in during this function. */ | |
1524 | if (sigchld_deferred) | |
1525 | kill (getpid (), SIGCHLD); | |
1526 | #endif | |
1527 | #endif /* ordinary USG */ | |
1528 | #endif /* not BSD4_1 */ | |
1529 | #endif /* SIGCHLD */ | |
1530 | } | |
1531 | #endif /* not VMS */ | |
1532 | ||
1533 | #ifdef HAVE_SOCKETS | |
1534 | ||
1535 | /* open a TCP network connection to a given HOST/SERVICE. Treated | |
1536 | exactly like a normal process when reading and writing. Only | |
1537 | differences are in status display and process deletion. A network | |
1538 | connection has no PID; you cannot signal it. All you can do is | |
1539 | deactivate and close it via delete-process */ | |
1540 | ||
1541 | DEFUN ("open-network-stream", Fopen_network_stream, Sopen_network_stream, | |
1542 | 4, 4, 0, | |
1543 | "Open a TCP connection for a service to a host.\n\ | |
1544 | Returns a subprocess-object to represent the connection.\n\ | |
1545 | Input and output work as for subprocesses; `delete-process' closes it.\n\ | |
1546 | Args are NAME BUFFER HOST SERVICE.\n\ | |
1547 | NAME is name for process. It is modified if necessary to make it unique.\n\ | |
1548 | BUFFER is the buffer (or buffer-name) to associate with the process.\n\ | |
1549 | Process output goes at end of that buffer, unless you specify\n\ | |
1550 | an output stream or filter function to handle the output.\n\ | |
1551 | BUFFER may be also nil, meaning that this process is not associated\n\ | |
1552 | with any buffer\n\ | |
1553 | Third arg is name of the host to connect to, or its IP address.\n\ | |
1554 | Fourth arg SERVICE is name of the service desired, or an integer\n\ | |
1555 | specifying a port number to connect to.") | |
1556 | (name, buffer, host, service) | |
1557 | Lisp_Object name, buffer, host, service; | |
1558 | { | |
1559 | Lisp_Object proc; | |
1560 | register int i; | |
1561 | struct sockaddr_in address; | |
1562 | struct servent *svc_info; | |
1563 | struct hostent *host_info_ptr, host_info; | |
1564 | char *(addr_list[2]); | |
79967d5e | 1565 | IN_ADDR numeric_addr; |
d0d6b7c5 JB |
1566 | int s, outch, inch; |
1567 | char errstring[80]; | |
1568 | int port; | |
1569 | struct hostent host_info_fixed; | |
1570 | struct gcpro gcpro1, gcpro2, gcpro3, gcpro4; | |
e333e864 | 1571 | int retry = 0; |
44ade2e9 | 1572 | int count = specpdl_ptr - specpdl; |
d0d6b7c5 JB |
1573 | |
1574 | GCPRO4 (name, buffer, host, service); | |
1575 | CHECK_STRING (name, 0); | |
1576 | CHECK_STRING (host, 0); | |
bcd69aea | 1577 | if (INTEGERP (service)) |
d0d6b7c5 JB |
1578 | port = htons ((unsigned short) XINT (service)); |
1579 | else | |
1580 | { | |
1581 | CHECK_STRING (service, 0); | |
1582 | svc_info = getservbyname (XSTRING (service)->data, "tcp"); | |
1583 | if (svc_info == 0) | |
1584 | error ("Unknown service \"%s\"", XSTRING (service)->data); | |
1585 | port = svc_info->s_port; | |
1586 | } | |
1587 | ||
1d2c16fa | 1588 | #ifndef TERM |
616da37c RS |
1589 | while (1) |
1590 | { | |
5f0929a7 RS |
1591 | #ifdef TRY_AGAIN |
1592 | h_errno = 0; | |
1593 | #endif | |
616da37c RS |
1594 | host_info_ptr = gethostbyname (XSTRING (host)->data); |
1595 | #ifdef TRY_AGAIN | |
1596 | if (! (host_info_ptr == 0 && h_errno == TRY_AGAIN)) | |
1597 | #endif | |
1598 | break; | |
1599 | Fsleep_for (make_number (1), Qnil); | |
1600 | } | |
d0d6b7c5 JB |
1601 | if (host_info_ptr == 0) |
1602 | /* Attempt to interpret host as numeric inet address */ | |
1603 | { | |
393a9679 | 1604 | numeric_addr = inet_addr ((char *) XSTRING (host)->data); |
79967d5e | 1605 | if (NUMERIC_ADDR_ERROR) |
d0d6b7c5 JB |
1606 | error ("Unknown host \"%s\"", XSTRING (host)->data); |
1607 | ||
1608 | host_info_ptr = &host_info; | |
1609 | host_info.h_name = 0; | |
1610 | host_info.h_aliases = 0; | |
1611 | host_info.h_addrtype = AF_INET; | |
39a21be6 JB |
1612 | #ifdef h_addr |
1613 | /* Older machines have only one address slot called h_addr. | |
1614 | Newer machines have h_addr_list, but #define h_addr to | |
1615 | be its first element. */ | |
1616 | host_info.h_addr_list = &(addr_list[0]); | |
1617 | #endif | |
1618 | host_info.h_addr = (char*)(&numeric_addr); | |
d0d6b7c5 JB |
1619 | addr_list[1] = 0; |
1620 | host_info.h_length = strlen (addr_list[0]); | |
1621 | } | |
1622 | ||
1623 | bzero (&address, sizeof address); | |
1624 | bcopy (host_info_ptr->h_addr, (char *) &address.sin_addr, | |
1625 | host_info_ptr->h_length); | |
1626 | address.sin_family = host_info_ptr->h_addrtype; | |
1627 | address.sin_port = port; | |
1628 | ||
1629 | s = socket (host_info_ptr->h_addrtype, SOCK_STREAM, 0); | |
1630 | if (s < 0) | |
1631 | report_file_error ("error creating socket", Fcons (name, Qnil)); | |
1632 | ||
457a9bee RS |
1633 | /* Kernel bugs (on Ultrix at least) cause lossage (not just EINTR) |
1634 | when connect is interrupted. So let's not let it get interrupted. | |
1635 | Note we do not turn off polling, because polling is only used | |
1636 | when not interrupt_input, and thus not normally used on the systems | |
1637 | which have this bug. On systems which use polling, there's no way | |
1638 | to quit if polling is turned off. */ | |
1639 | if (interrupt_input) | |
1640 | unrequest_sigio (); | |
1641 | ||
44ade2e9 RS |
1642 | /* Slow down polling to every ten seconds. |
1643 | Some kernels have a bug which causes retrying connect to fail | |
1644 | after a connect. */ | |
1645 | #ifdef POLL_FOR_INPUT | |
1646 | bind_polling_period (10); | |
1647 | #endif | |
1648 | ||
d0d6b7c5 | 1649 | loop: |
e333e864 RS |
1650 | if (connect (s, (struct sockaddr *) &address, sizeof address) == -1 |
1651 | && errno != EISCONN) | |
d0d6b7c5 JB |
1652 | { |
1653 | int xerrno = errno; | |
e333e864 | 1654 | |
d0d6b7c5 JB |
1655 | if (errno == EINTR) |
1656 | goto loop; | |
e333e864 RS |
1657 | if (errno == EADDRINUSE && retry < 20) |
1658 | { | |
1659 | retry++; | |
1660 | goto loop; | |
1661 | } | |
1662 | ||
d0d6b7c5 | 1663 | close (s); |
457a9bee RS |
1664 | |
1665 | if (interrupt_input) | |
1666 | request_sigio (); | |
1667 | ||
d0d6b7c5 JB |
1668 | errno = xerrno; |
1669 | report_file_error ("connection failed", | |
1670 | Fcons (host, Fcons (name, Qnil))); | |
1671 | } | |
457a9bee | 1672 | |
44ade2e9 RS |
1673 | #ifdef POLL_FOR_INPUT |
1674 | unbind_to (count, Qnil); | |
1675 | #endif | |
1676 | ||
457a9bee RS |
1677 | if (interrupt_input) |
1678 | request_sigio (); | |
1679 | ||
1d2c16fa RS |
1680 | #else /* TERM */ |
1681 | s = connect_server (0); | |
1682 | if (s < 0) | |
1683 | report_file_error ("error creating socket", Fcons (name, Qnil)); | |
1684 | send_command (s, C_PORT, 0, "%s:%d", XSTRING (host)->data, ntohs (port)); | |
1685 | send_command (s, C_DUMB, 1, 0); | |
1686 | #endif /* TERM */ | |
d0d6b7c5 JB |
1687 | |
1688 | inch = s; | |
1689 | outch = dup (s); | |
1690 | if (outch < 0) | |
1691 | report_file_error ("error duplicating socket", Fcons (name, Qnil)); | |
1692 | ||
1693 | if (!NILP (buffer)) | |
1694 | buffer = Fget_buffer_create (buffer); | |
1695 | proc = make_process (name); | |
1696 | ||
1697 | chan_process[inch] = proc; | |
1698 | ||
1699 | #ifdef O_NONBLOCK | |
1700 | fcntl (inch, F_SETFL, O_NONBLOCK); | |
1701 | #else | |
1702 | #ifdef O_NDELAY | |
1703 | fcntl (inch, F_SETFL, O_NDELAY); | |
1704 | #endif | |
1705 | #endif | |
1706 | ||
1707 | XPROCESS (proc)->childp = host; | |
1708 | XPROCESS (proc)->command_channel_p = Qnil; | |
1709 | XPROCESS (proc)->buffer = buffer; | |
1710 | XPROCESS (proc)->sentinel = Qnil; | |
1711 | XPROCESS (proc)->filter = Qnil; | |
1712 | XPROCESS (proc)->command = Qnil; | |
1713 | XPROCESS (proc)->pid = Qnil; | |
1d056e64 KH |
1714 | XSETINT (XPROCESS (proc)->infd, s); |
1715 | XSETINT (XPROCESS (proc)->outfd, outch); | |
d0d6b7c5 JB |
1716 | XPROCESS (proc)->status = Qrun; |
1717 | FD_SET (inch, &input_wait_mask); | |
a69281ff | 1718 | FD_SET (inch, &non_keyboard_wait_mask); |
7d0e672e RS |
1719 | if (inch > max_process_desc) |
1720 | max_process_desc = inch; | |
d0d6b7c5 JB |
1721 | |
1722 | UNGCPRO; | |
1723 | return proc; | |
1724 | } | |
1725 | #endif /* HAVE_SOCKETS */ | |
1726 | ||
1727 | deactivate_process (proc) | |
1728 | Lisp_Object proc; | |
1729 | { | |
1730 | register int inchannel, outchannel; | |
1731 | register struct Lisp_Process *p = XPROCESS (proc); | |
1732 | ||
a9f2c884 RS |
1733 | inchannel = XINT (p->infd); |
1734 | outchannel = XINT (p->outfd); | |
d0d6b7c5 | 1735 | |
a9f2c884 | 1736 | if (inchannel >= 0) |
d0d6b7c5 JB |
1737 | { |
1738 | /* Beware SIGCHLD hereabouts. */ | |
1739 | flush_pending_output (inchannel); | |
1740 | #ifdef VMS | |
1741 | { | |
1742 | VMS_PROC_STUFF *get_vms_process_pointer (), *vs; | |
1743 | sys$dassgn (outchannel); | |
c6c6865d | 1744 | vs = get_vms_process_pointer (p->pid); |
d0d6b7c5 JB |
1745 | if (vs) |
1746 | give_back_vms_process_stuff (vs); | |
1747 | } | |
1748 | #else | |
1749 | close (inchannel); | |
a9f2c884 | 1750 | if (outchannel >= 0 && outchannel != inchannel) |
d0d6b7c5 JB |
1751 | close (outchannel); |
1752 | #endif | |
1753 | ||
1d056e64 KH |
1754 | XSETINT (p->infd, -1); |
1755 | XSETINT (p->outfd, -1); | |
d0d6b7c5 JB |
1756 | chan_process[inchannel] = Qnil; |
1757 | FD_CLR (inchannel, &input_wait_mask); | |
a69281ff | 1758 | FD_CLR (inchannel, &non_keyboard_wait_mask); |
7d0e672e RS |
1759 | if (inchannel == max_process_desc) |
1760 | { | |
1761 | int i; | |
1762 | /* We just closed the highest-numbered process input descriptor, | |
1763 | so recompute the highest-numbered one now. */ | |
1764 | max_process_desc = 0; | |
1765 | for (i = 0; i < MAXDESC; i++) | |
1766 | if (!NILP (chan_process[i])) | |
1767 | max_process_desc = i; | |
1768 | } | |
d0d6b7c5 JB |
1769 | } |
1770 | } | |
1771 | ||
1772 | /* Close all descriptors currently in use for communication | |
1773 | with subprocess. This is used in a newly-forked subprocess | |
1774 | to get rid of irrelevant descriptors. */ | |
1775 | ||
1776 | close_process_descs () | |
1777 | { | |
e98d950b | 1778 | #ifndef WINDOWSNT |
d0d6b7c5 JB |
1779 | int i; |
1780 | for (i = 0; i < MAXDESC; i++) | |
1781 | { | |
1782 | Lisp_Object process; | |
1783 | process = chan_process[i]; | |
1784 | if (!NILP (process)) | |
1785 | { | |
a9f2c884 RS |
1786 | int in = XINT (XPROCESS (process)->infd); |
1787 | int out = XINT (XPROCESS (process)->outfd); | |
1788 | if (in >= 0) | |
d0d6b7c5 | 1789 | close (in); |
a9f2c884 | 1790 | if (out >= 0 && in != out) |
d0d6b7c5 JB |
1791 | close (out); |
1792 | } | |
1793 | } | |
e98d950b | 1794 | #endif |
d0d6b7c5 JB |
1795 | } |
1796 | \f | |
1797 | DEFUN ("accept-process-output", Faccept_process_output, Saccept_process_output, | |
1798 | 0, 3, 0, | |
1799 | "Allow any pending output from subprocesses to be read by Emacs.\n\ | |
1800 | It is read into the process' buffers or given to their filter functions.\n\ | |
1801 | Non-nil arg PROCESS means do not return until some output has been received\n\ | |
1802 | from PROCESS.\n\ | |
1803 | Non-nil second arg TIMEOUT and third arg TIMEOUT-MSECS are number of\n\ | |
1804 | seconds and microseconds to wait; return after that much time whether\n\ | |
1805 | or not there is input.\n\ | |
1806 | Return non-nil iff we received any output before the timeout expired.") | |
1807 | (proc, timeout, timeout_msecs) | |
1808 | register Lisp_Object proc, timeout, timeout_msecs; | |
1809 | { | |
1810 | int seconds; | |
1811 | int useconds; | |
1812 | ||
1813 | if (! NILP (timeout_msecs)) | |
1814 | { | |
1815 | CHECK_NUMBER (timeout_msecs, 2); | |
1816 | useconds = XINT (timeout_msecs); | |
bcd69aea | 1817 | if (!INTEGERP (timeout)) |
1d056e64 | 1818 | XSETINT (timeout, 0); |
d0d6b7c5 JB |
1819 | |
1820 | { | |
1821 | int carry = useconds / 1000000; | |
1822 | ||
1823 | XSETINT (timeout, XINT (timeout) + carry); | |
1824 | useconds -= carry * 1000000; | |
1825 | ||
1826 | /* I think this clause is necessary because C doesn't | |
1827 | guarantee a particular rounding direction for negative | |
1828 | integers. */ | |
1829 | if (useconds < 0) | |
1830 | { | |
1831 | XSETINT (timeout, XINT (timeout) - 1); | |
1832 | useconds += 1000000; | |
1833 | } | |
1834 | } | |
1835 | } | |
de946e5a RS |
1836 | else |
1837 | useconds = 0; | |
d0d6b7c5 JB |
1838 | |
1839 | if (! NILP (timeout)) | |
1840 | { | |
1841 | CHECK_NUMBER (timeout, 1); | |
1842 | seconds = XINT (timeout); | |
1843 | if (seconds <= 0) | |
1844 | seconds = -1; | |
1845 | } | |
1846 | else | |
1847 | { | |
1848 | if (NILP (proc)) | |
1849 | seconds = -1; | |
1850 | else | |
1851 | seconds = 0; | |
1852 | } | |
1853 | ||
f76475ad | 1854 | if (NILP (proc)) |
22719df2 | 1855 | XSETFASTINT (proc, 0); |
f76475ad | 1856 | |
d0d6b7c5 | 1857 | return |
f76475ad | 1858 | (wait_reading_process_input (seconds, useconds, proc, 0) |
d0d6b7c5 JB |
1859 | ? Qt : Qnil); |
1860 | } | |
1861 | ||
1862 | /* This variable is different from waiting_for_input in keyboard.c. | |
1863 | It is used to communicate to a lisp process-filter/sentinel (via the | |
1864 | function Fwaiting_for_user_input_p below) whether emacs was waiting | |
1865 | for user-input when that process-filter was called. | |
1866 | waiting_for_input cannot be used as that is by definition 0 when | |
d430ee71 RS |
1867 | lisp code is being evalled. |
1868 | This is also used in record_asynch_buffer_change. | |
1869 | For that purpose, this must be 0 | |
1870 | when not inside wait_reading_process_input. */ | |
d0d6b7c5 JB |
1871 | static int waiting_for_user_input_p; |
1872 | ||
1873 | /* Read and dispose of subprocess output while waiting for timeout to | |
1874 | elapse and/or keyboard input to be available. | |
1875 | ||
de6fd4b9 | 1876 | TIME_LIMIT is: |
d0d6b7c5 JB |
1877 | timeout in seconds, or |
1878 | zero for no limit, or | |
1879 | -1 means gobble data immediately available but don't wait for any. | |
1880 | ||
de6fd4b9 RS |
1881 | MICROSECS is: |
1882 | an additional duration to wait, measured in microseconds. | |
1883 | If this is nonzero and time_limit is 0, then the timeout | |
1884 | consists of MICROSECS only. | |
6e4f3667 | 1885 | |
de6fd4b9 | 1886 | READ_KBD is a lisp value: |
d0d6b7c5 JB |
1887 | 0 to ignore keyboard input, or |
1888 | 1 to return when input is available, or | |
84aa3ace | 1889 | -1 meaning caller will actually read the input, so don't throw to |
d0d6b7c5 | 1890 | the quit handler, or |
e6194ffc | 1891 | a cons cell, meaning wait until its car is non-nil |
de6fd4b9 | 1892 | (and gobble terminal input into the buffer if any arrives), or |
f76475ad JB |
1893 | a process object, meaning wait until something arrives from that |
1894 | process. The return value is true iff we read some input from | |
1895 | that process. | |
d0d6b7c5 | 1896 | |
de6fd4b9 | 1897 | DO_DISPLAY != 0 means redisplay should be done to show subprocess |
d0d6b7c5 JB |
1898 | output that arrives. |
1899 | ||
de6fd4b9 | 1900 | If READ_KBD is a pointer to a struct Lisp_Process, then the |
d0d6b7c5 JB |
1901 | function returns true iff we received input from that process |
1902 | before the timeout elapsed. | |
eb8c3be9 | 1903 | Otherwise, return true iff we received input from any process. */ |
d0d6b7c5 JB |
1904 | |
1905 | wait_reading_process_input (time_limit, microsecs, read_kbd, do_display) | |
f76475ad JB |
1906 | int time_limit, microsecs; |
1907 | Lisp_Object read_kbd; | |
1908 | int do_display; | |
d0d6b7c5 JB |
1909 | { |
1910 | register int channel, nfds, m; | |
1911 | static SELECT_TYPE Available; | |
1912 | int xerrno; | |
1913 | Lisp_Object proc; | |
1914 | EMACS_TIME timeout, end_time, garbage; | |
1915 | SELECT_TYPE Atemp; | |
a9f2c884 | 1916 | int wait_channel = -1; |
d0d6b7c5 JB |
1917 | struct Lisp_Process *wait_proc = 0; |
1918 | int got_some_input = 0; | |
84aa3ace | 1919 | Lisp_Object *wait_for_cell = 0; |
d0d6b7c5 JB |
1920 | |
1921 | FD_ZERO (&Available); | |
1922 | ||
f76475ad JB |
1923 | /* If read_kbd is a process to watch, set wait_proc and wait_channel |
1924 | accordingly. */ | |
bcd69aea | 1925 | if (PROCESSP (read_kbd)) |
d0d6b7c5 | 1926 | { |
f76475ad | 1927 | wait_proc = XPROCESS (read_kbd); |
a9f2c884 | 1928 | wait_channel = XINT (wait_proc->infd); |
22719df2 | 1929 | XSETFASTINT (read_kbd, 0); |
d0d6b7c5 JB |
1930 | } |
1931 | ||
84aa3ace | 1932 | /* If waiting for non-nil in a cell, record where. */ |
bcd69aea | 1933 | if (CONSP (read_kbd)) |
84aa3ace RS |
1934 | { |
1935 | wait_for_cell = &XCONS (read_kbd)->car; | |
22719df2 | 1936 | XSETFASTINT (read_kbd, 0); |
84aa3ace RS |
1937 | } |
1938 | ||
f76475ad | 1939 | waiting_for_user_input_p = XINT (read_kbd); |
d0d6b7c5 JB |
1940 | |
1941 | /* Since we may need to wait several times, | |
1942 | compute the absolute time to return at. */ | |
1943 | if (time_limit || microsecs) | |
1944 | { | |
1945 | EMACS_GET_TIME (end_time); | |
1946 | EMACS_SET_SECS_USECS (timeout, time_limit, microsecs); | |
1947 | EMACS_ADD_TIME (end_time, end_time, timeout); | |
1948 | } | |
1949 | ||
99e3d726 RS |
1950 | /* It would not be safe to call this below, |
1951 | where we call redisplay_preserve_echo_area. */ | |
8b4d685f RS |
1952 | if (do_display && frame_garbaged) |
1953 | prepare_menu_bars (); | |
99e3d726 | 1954 | |
d0d6b7c5 JB |
1955 | while (1) |
1956 | { | |
1957 | /* If calling from keyboard input, do not quit | |
1958 | since we want to return C-g as an input character. | |
1959 | Otherwise, do pending quit if requested. */ | |
f76475ad | 1960 | if (XINT (read_kbd) >= 0) |
d0d6b7c5 JB |
1961 | QUIT; |
1962 | ||
889255b4 RS |
1963 | /* Exit now if the cell we're waiting for became non-nil. */ |
1964 | if (wait_for_cell && ! NILP (*wait_for_cell)) | |
1965 | break; | |
1966 | ||
d0d6b7c5 JB |
1967 | /* Compute time from now till when time limit is up */ |
1968 | /* Exit if already run out */ | |
1969 | if (time_limit == -1) | |
1970 | { | |
1971 | /* -1 specified for timeout means | |
1972 | gobble output available now | |
1973 | but don't wait at all. */ | |
1974 | ||
1975 | EMACS_SET_SECS_USECS (timeout, 0, 0); | |
1976 | } | |
1977 | else if (time_limit || microsecs) | |
1978 | { | |
1979 | EMACS_GET_TIME (timeout); | |
1980 | EMACS_SUB_TIME (timeout, end_time, timeout); | |
1981 | if (EMACS_TIME_NEG_P (timeout)) | |
1982 | break; | |
1983 | } | |
1984 | else | |
1985 | { | |
1986 | EMACS_SET_SECS_USECS (timeout, 100000, 0); | |
1987 | } | |
1988 | ||
90ab1a81 JB |
1989 | /* Cause C-g and alarm signals to take immediate action, |
1990 | and cause input available signals to zero out timeout. | |
1991 | ||
1992 | It is important that we do this before checking for process | |
1993 | activity. If we get a SIGCHLD after the explicit checks for | |
1994 | process activity, timeout is the only way we will know. */ | |
1995 | if (XINT (read_kbd) < 0) | |
1996 | set_waiting_for_input (&timeout); | |
1997 | ||
6be429b1 JB |
1998 | /* If status of something has changed, and no input is |
1999 | available, notify the user of the change right away. After | |
2000 | this explicit check, we'll let the SIGCHLD handler zap | |
2001 | timeout to get our attention. */ | |
2002 | if (update_tick != process_tick && do_display) | |
2003 | { | |
2004 | Atemp = input_wait_mask; | |
2005 | EMACS_SET_SECS_USECS (timeout, 0, 0); | |
2006 | if (select (MAXDESC, &Atemp, 0, 0, &timeout) <= 0) | |
90ab1a81 JB |
2007 | { |
2008 | /* It's okay for us to do this and then continue with | |
a0e4d3f3 | 2009 | the loop, since timeout has already been zeroed out. */ |
90ab1a81 JB |
2010 | clear_waiting_for_input (); |
2011 | status_notify (); | |
2012 | } | |
6be429b1 JB |
2013 | } |
2014 | ||
2015 | /* Don't wait for output from a non-running process. */ | |
2016 | if (wait_proc != 0 && !NILP (wait_proc->raw_status_low)) | |
2017 | update_status (wait_proc); | |
2018 | if (wait_proc != 0 | |
2019 | && ! EQ (wait_proc->status, Qrun)) | |
9aa2a7f4 JB |
2020 | { |
2021 | clear_waiting_for_input (); | |
2022 | break; | |
2023 | } | |
6be429b1 | 2024 | |
d0d6b7c5 JB |
2025 | /* Wait till there is something to do */ |
2026 | ||
5e7e1da2 | 2027 | if (! XINT (read_kbd) && wait_for_cell == 0) |
a69281ff RS |
2028 | Available = non_keyboard_wait_mask; |
2029 | else | |
2030 | Available = input_wait_mask; | |
d0d6b7c5 | 2031 | |
ff11dfa1 | 2032 | /* If frame size has changed or the window is newly mapped, |
ffd56f97 JB |
2033 | redisplay now, before we start to wait. There is a race |
2034 | condition here; if a SIGIO arrives between now and the select | |
016899c0 JB |
2035 | and indicates that a frame is trashed, the select may block |
2036 | displaying a trashed screen. */ | |
5164ee8e | 2037 | if (frame_garbaged && do_display) |
ffd56f97 JB |
2038 | redisplay_preserve_echo_area (); |
2039 | ||
f76475ad | 2040 | if (XINT (read_kbd) && detect_input_pending ()) |
a9f2c884 RS |
2041 | { |
2042 | nfds = 0; | |
2043 | FD_ZERO (&Available); | |
2044 | } | |
d0d6b7c5 | 2045 | else |
d0d6b7c5 | 2046 | nfds = select (MAXDESC, &Available, 0, 0, &timeout); |
6720a7fb | 2047 | |
d0d6b7c5 JB |
2048 | xerrno = errno; |
2049 | ||
2050 | /* Make C-g and alarm signals set flags again */ | |
2051 | clear_waiting_for_input (); | |
2052 | ||
2053 | /* If we woke up due to SIGWINCH, actually change size now. */ | |
2054 | do_pending_window_change (); | |
2055 | ||
ffd56f97 | 2056 | if (time_limit && nfds == 0) /* timeout elapsed */ |
d0d6b7c5 JB |
2057 | break; |
2058 | if (nfds < 0) | |
2059 | { | |
2060 | if (xerrno == EINTR) | |
2061 | FD_ZERO (&Available); | |
b0310da4 JB |
2062 | #ifdef ultrix |
2063 | /* Ultrix select seems to return ENOMEM when it is | |
2064 | interrupted. Treat it just like EINTR. Bleah. Note | |
2065 | that we want to test for the "ultrix" CPP symbol, not | |
2066 | "__ultrix__"; the latter is only defined under GCC, but | |
2067 | not by DEC's bundled CC. -JimB */ | |
8058415c JB |
2068 | else if (xerrno == ENOMEM) |
2069 | FD_ZERO (&Available); | |
2070 | #endif | |
d0d6b7c5 JB |
2071 | #ifdef ALLIANT |
2072 | /* This happens for no known reason on ALLIANT. | |
2073 | I am guessing that this is the right response. -- RMS. */ | |
2074 | else if (xerrno == EFAULT) | |
2075 | FD_ZERO (&Available); | |
2076 | #endif | |
2077 | else if (xerrno == EBADF) | |
2078 | { | |
2079 | #ifdef AIX | |
2080 | /* AIX doesn't handle PTY closure the same way BSD does. On AIX, | |
2081 | the child's closure of the pts gives the parent a SIGHUP, and | |
2082 | the ptc file descriptor is automatically closed, | |
2083 | yielding EBADF here or at select() call above. | |
2084 | So, SIGHUP is ignored (see def of PTY_TTY_NAME_SPRINTF | |
a0e4d3f3 | 2085 | in m/ibmrt-aix.h), and here we just ignore the select error. |
d0d6b7c5 | 2086 | Cleanup occurs c/o status_notify after SIGCLD. */ |
ffd56f97 | 2087 | FD_ZERO (&Available); /* Cannot depend on values returned */ |
d0d6b7c5 JB |
2088 | #else |
2089 | abort (); | |
2090 | #endif | |
2091 | } | |
2092 | else | |
b062d1fe | 2093 | error("select error: %s", strerror (xerrno)); |
d0d6b7c5 | 2094 | } |
26ec91de | 2095 | #if defined(sun) && !defined(USG5_4) |
a69281ff | 2096 | else if (nfds > 0 && keyboard_bit_set (&Available) |
dd2281ae | 2097 | && interrupt_input) |
e0109153 JB |
2098 | /* System sometimes fails to deliver SIGIO. |
2099 | ||
2100 | David J. Mackenzie says that Emacs doesn't compile under | |
2101 | Solaris if this code is enabled, thus the USG5_4 in the CPP | |
2102 | conditional. "I haven't noticed any ill effects so far. | |
2103 | If you find a Solaris expert somewhere, they might know | |
2104 | better." */ | |
d0d6b7c5 JB |
2105 | kill (getpid (), SIGIO); |
2106 | #endif | |
2107 | ||
2108 | /* Check for keyboard input */ | |
2109 | /* If there is any, return immediately | |
2110 | to give it higher priority than subprocesses */ | |
2111 | ||
e6194ffc | 2112 | /* We used to do this if wait_for_cell, |
6cbc22ed | 2113 | but that caused infinite recursion in selection request events. */ |
5e7e1da2 | 2114 | if ((XINT (read_kbd) || wait_for_cell) |
97f3b3d6 | 2115 | && detect_input_pending ()) |
6e103bac RS |
2116 | { |
2117 | swallow_events (); | |
2118 | if (detect_input_pending ()) | |
2119 | break; | |
2120 | } | |
d0d6b7c5 | 2121 | |
84aa3ace RS |
2122 | /* Exit now if the cell we're waiting for became non-nil. */ |
2123 | if (wait_for_cell && ! NILP (*wait_for_cell)) | |
2124 | break; | |
2125 | ||
4746118a | 2126 | #ifdef SIGIO |
d0d6b7c5 JB |
2127 | /* If we think we have keyboard input waiting, but didn't get SIGIO |
2128 | go read it. This can happen with X on BSD after logging out. | |
2129 | In that case, there really is no input and no SIGIO, | |
2130 | but select says there is input. */ | |
2131 | ||
dd2281ae | 2132 | if (XINT (read_kbd) && interrupt_input |
a69281ff | 2133 | && (keyboard_bit_set (&Available))) |
d0d6b7c5 | 2134 | kill (0, SIGIO); |
4746118a | 2135 | #endif |
d0d6b7c5 | 2136 | |
d0d6b7c5 JB |
2137 | if (! wait_proc) |
2138 | got_some_input |= nfds > 0; | |
2139 | ||
32676c08 JB |
2140 | /* If checking input just got us a size-change event from X, |
2141 | obey it now if we should. */ | |
97f3b3d6 | 2142 | if (XINT (read_kbd) || wait_for_cell) |
32676c08 JB |
2143 | do_pending_window_change (); |
2144 | ||
a9f2c884 RS |
2145 | /* Check for data from a process. */ |
2146 | /* Really FIRST_PROC_DESC should be 0 on Unix, | |
2147 | but this is safer in the short run. */ | |
a69281ff | 2148 | for (channel = 0; channel <= max_process_desc; channel++) |
d0d6b7c5 | 2149 | { |
a69281ff RS |
2150 | if (FD_ISSET (channel, &Available) |
2151 | && FD_ISSET (channel, &non_keyboard_wait_mask)) | |
d0d6b7c5 JB |
2152 | { |
2153 | int nread; | |
2154 | ||
2155 | /* If waiting for this channel, arrange to return as | |
2156 | soon as no more input to be processed. No more | |
2157 | waiting. */ | |
2158 | if (wait_channel == channel) | |
2159 | { | |
a9f2c884 | 2160 | wait_channel = -1; |
d0d6b7c5 JB |
2161 | time_limit = -1; |
2162 | got_some_input = 1; | |
2163 | } | |
2164 | proc = chan_process[channel]; | |
2165 | if (NILP (proc)) | |
2166 | continue; | |
2167 | ||
d0d6b7c5 JB |
2168 | /* Read data from the process, starting with our |
2169 | buffered-ahead character if we have one. */ | |
2170 | ||
2171 | nread = read_process_output (proc, channel); | |
2172 | if (nread > 0) | |
2173 | { | |
2174 | /* Since read_process_output can run a filter, | |
2175 | which can call accept-process-output, | |
2176 | don't try to read from any other processes | |
2177 | before doing the select again. */ | |
2178 | FD_ZERO (&Available); | |
2179 | ||
2180 | if (do_display) | |
2181 | redisplay_preserve_echo_area (); | |
2182 | } | |
2183 | #ifdef EWOULDBLOCK | |
2184 | else if (nread == -1 && errno == EWOULDBLOCK) | |
2185 | ; | |
2186 | #else | |
2187 | #ifdef O_NONBLOCK | |
2188 | else if (nread == -1 && errno == EAGAIN) | |
2189 | ; | |
2190 | #else | |
2191 | #ifdef O_NDELAY | |
2192 | else if (nread == -1 && errno == EAGAIN) | |
2193 | ; | |
2194 | /* Note that we cannot distinguish between no input | |
2195 | available now and a closed pipe. | |
2196 | With luck, a closed pipe will be accompanied by | |
2197 | subprocess termination and SIGCHLD. */ | |
2198 | else if (nread == 0 && !NETCONN_P (proc)) | |
2199 | ; | |
ffd56f97 JB |
2200 | #endif /* O_NDELAY */ |
2201 | #endif /* O_NONBLOCK */ | |
2202 | #endif /* EWOULDBLOCK */ | |
d0d6b7c5 JB |
2203 | #ifdef HAVE_PTYS |
2204 | /* On some OSs with ptys, when the process on one end of | |
2205 | a pty exits, the other end gets an error reading with | |
2206 | errno = EIO instead of getting an EOF (0 bytes read). | |
2207 | Therefore, if we get an error reading and errno = | |
2208 | EIO, just continue, because the child process has | |
2209 | exited and should clean itself up soon (e.g. when we | |
2210 | get a SIGCHLD). */ | |
2211 | else if (nread == -1 && errno == EIO) | |
2212 | ; | |
ffd56f97 JB |
2213 | #endif /* HAVE_PTYS */ |
2214 | /* If we can detect process termination, don't consider the process | |
2215 | gone just because its pipe is closed. */ | |
d0d6b7c5 JB |
2216 | #ifdef SIGCHLD |
2217 | else if (nread == 0 && !NETCONN_P (proc)) | |
2218 | ; | |
2219 | #endif | |
2220 | else | |
2221 | { | |
2222 | /* Preserve status of processes already terminated. */ | |
2223 | XSETINT (XPROCESS (proc)->tick, ++process_tick); | |
2224 | deactivate_process (proc); | |
2225 | if (!NILP (XPROCESS (proc)->raw_status_low)) | |
2226 | update_status (XPROCESS (proc)); | |
2227 | if (EQ (XPROCESS (proc)->status, Qrun)) | |
2228 | XPROCESS (proc)->status | |
2229 | = Fcons (Qexit, Fcons (make_number (256), Qnil)); | |
2230 | } | |
2231 | } | |
ffd56f97 JB |
2232 | } /* end for each file descriptor */ |
2233 | } /* end while exit conditions not met */ | |
d0d6b7c5 | 2234 | |
d430ee71 RS |
2235 | waiting_for_user_input_p = 0; |
2236 | ||
ffd56f97 JB |
2237 | /* If calling from keyboard input, do not quit |
2238 | since we want to return C-g as an input character. | |
2239 | Otherwise, do pending quit if requested. */ | |
f76475ad | 2240 | if (XINT (read_kbd) >= 0) |
ffd56f97 JB |
2241 | { |
2242 | /* Prevent input_pending from remaining set if we quit. */ | |
2243 | clear_input_pending (); | |
2244 | QUIT; | |
2245 | } | |
d0d6b7c5 JB |
2246 | |
2247 | return got_some_input; | |
2248 | } | |
2249 | \f | |
3b9a3dfa RS |
2250 | /* Given a list (FUNCTION ARGS...), apply FUNCTION to the ARGS. */ |
2251 | ||
2252 | static Lisp_Object | |
2253 | read_process_output_call (fun_and_args) | |
2254 | Lisp_Object fun_and_args; | |
2255 | { | |
2256 | return apply1 (XCONS (fun_and_args)->car, XCONS (fun_and_args)->cdr); | |
2257 | } | |
2258 | ||
2259 | static Lisp_Object | |
2260 | read_process_output_error_handler (error) | |
2261 | Lisp_Object error; | |
2262 | { | |
2263 | cmd_error_internal (error, "error in process filter: "); | |
2264 | Vinhibit_quit = Qt; | |
2265 | update_echo_area (); | |
833ba342 | 2266 | Fsleep_for (make_number (2), Qnil); |
3b9a3dfa RS |
2267 | } |
2268 | ||
d0d6b7c5 JB |
2269 | /* Read pending output from the process channel, |
2270 | starting with our buffered-ahead character if we have one. | |
2271 | Yield number of characters read. | |
2272 | ||
2273 | This function reads at most 1024 characters. | |
2274 | If you want to read all available subprocess output, | |
2275 | you must call it repeatedly until it returns zero. */ | |
2276 | ||
2277 | read_process_output (proc, channel) | |
2278 | Lisp_Object proc; | |
2279 | register int channel; | |
2280 | { | |
2281 | register int nchars; | |
2282 | #ifdef VMS | |
2283 | char *chars; | |
2284 | #else | |
2285 | char chars[1024]; | |
2286 | #endif | |
2287 | register Lisp_Object outstream; | |
2288 | register struct buffer *old = current_buffer; | |
2289 | register struct Lisp_Process *p = XPROCESS (proc); | |
2290 | register int opoint; | |
2291 | ||
2292 | #ifdef VMS | |
2293 | VMS_PROC_STUFF *vs, *get_vms_process_pointer(); | |
2294 | ||
2295 | vs = get_vms_process_pointer (p->pid); | |
2296 | if (vs) | |
2297 | { | |
2298 | if (!vs->iosb[0]) | |
2299 | return(0); /* Really weird if it does this */ | |
2300 | if (!(vs->iosb[0] & 1)) | |
2301 | return -1; /* I/O error */ | |
2302 | } | |
2303 | else | |
2304 | error ("Could not get VMS process pointer"); | |
2305 | chars = vs->inputBuffer; | |
2306 | nchars = clean_vms_buffer (chars, vs->iosb[1]); | |
2307 | if (nchars <= 0) | |
2308 | { | |
2309 | start_vms_process_read (vs); /* Crank up the next read on the process */ | |
2310 | return 1; /* Nothing worth printing, say we got 1 */ | |
2311 | } | |
2312 | #else /* not VMS */ | |
2313 | ||
2314 | if (proc_buffered_char[channel] < 0) | |
e98d950b RS |
2315 | #ifdef WINDOWSNT |
2316 | nchars = read_child_output (channel, chars, sizeof (chars)); | |
2317 | #else | |
d0d6b7c5 | 2318 | nchars = read (channel, chars, sizeof chars); |
e98d950b | 2319 | #endif |
d0d6b7c5 JB |
2320 | else |
2321 | { | |
2322 | chars[0] = proc_buffered_char[channel]; | |
2323 | proc_buffered_char[channel] = -1; | |
e98d950b RS |
2324 | #ifdef WINDOWSNT |
2325 | nchars = read_child_output (channel, chars + 1, sizeof (chars) - 1); | |
2326 | #else | |
d0d6b7c5 | 2327 | nchars = read (channel, chars + 1, sizeof chars - 1); |
e98d950b | 2328 | #endif |
d0d6b7c5 JB |
2329 | if (nchars < 0) |
2330 | nchars = 1; | |
2331 | else | |
2332 | nchars = nchars + 1; | |
2333 | } | |
2334 | #endif /* not VMS */ | |
2335 | ||
2336 | if (nchars <= 0) return nchars; | |
2337 | ||
2338 | outstream = p->filter; | |
2339 | if (!NILP (outstream)) | |
2340 | { | |
2341 | /* We inhibit quit here instead of just catching it so that | |
2342 | hitting ^G when a filter happens to be running won't screw | |
2343 | it up. */ | |
2344 | int count = specpdl_ptr - specpdl; | |
30c78175 | 2345 | Lisp_Object odeactivate; |
dfc21838 | 2346 | Lisp_Object obuffer, okeymap; |
30c78175 | 2347 | |
dfc21838 RS |
2348 | /* No need to gcpro these, because all we do with them later |
2349 | is test them for EQness, and none of them should be a string. */ | |
30c78175 | 2350 | odeactivate = Vdeactivate_mark; |
dfc21838 RS |
2351 | XSETBUFFER (obuffer, current_buffer); |
2352 | okeymap = current_buffer->keymap; | |
30c78175 | 2353 | |
d0d6b7c5 | 2354 | specbind (Qinhibit_quit, Qt); |
6545aada | 2355 | specbind (Qlast_nonmenu_event, Qt); |
3b9a3dfa | 2356 | |
7074fde6 | 2357 | running_asynch_code = 1; |
3b9a3dfa RS |
2358 | internal_condition_case_1 (read_process_output_call, |
2359 | Fcons (outstream, | |
2360 | Fcons (proc, | |
7074fde6 FP |
2361 | Fcons (make_string (chars, |
2362 | nchars), | |
3b9a3dfa RS |
2363 | Qnil))), |
2364 | !NILP (Vdebug_on_error) ? Qnil : Qerror, | |
2365 | read_process_output_error_handler); | |
7074fde6 FP |
2366 | running_asynch_code = 0; |
2367 | restore_match_data (); | |
d0d6b7c5 | 2368 | |
592ce97f | 2369 | /* Handling the process output should not deactivate the mark. */ |
30c78175 RS |
2370 | Vdeactivate_mark = odeactivate; |
2371 | ||
dfc21838 RS |
2372 | if (! EQ (Fcurrent_buffer (), obuffer) |
2373 | || ! EQ (current_buffer->keymap, okeymap)) | |
d72534ba KH |
2374 | record_asynch_buffer_change (); |
2375 | ||
8b4d685f RS |
2376 | if (waiting_for_user_input_p) |
2377 | prepare_menu_bars (); | |
2378 | ||
d0d6b7c5 JB |
2379 | #ifdef VMS |
2380 | start_vms_process_read (vs); | |
2381 | #endif | |
2ea6d561 | 2382 | unbind_to (count, Qnil); |
d0d6b7c5 JB |
2383 | return nchars; |
2384 | } | |
2385 | ||
2386 | /* If no filter, write into buffer if it isn't dead. */ | |
2387 | if (!NILP (p->buffer) && !NILP (XBUFFER (p->buffer)->name)) | |
2388 | { | |
b0310da4 JB |
2389 | Lisp_Object old_read_only; |
2390 | Lisp_Object old_begv, old_zv; | |
30c78175 RS |
2391 | Lisp_Object odeactivate; |
2392 | ||
2393 | odeactivate = Vdeactivate_mark; | |
d0d6b7c5 JB |
2394 | |
2395 | Fset_buffer (p->buffer); | |
2396 | opoint = point; | |
b0310da4 | 2397 | old_read_only = current_buffer->read_only; |
22719df2 KH |
2398 | XSETFASTINT (old_begv, BEGV); |
2399 | XSETFASTINT (old_zv, ZV); | |
b0310da4 JB |
2400 | |
2401 | current_buffer->read_only = Qnil; | |
d0d6b7c5 JB |
2402 | |
2403 | /* Insert new output into buffer | |
2404 | at the current end-of-output marker, | |
2405 | thus preserving logical ordering of input and output. */ | |
2406 | if (XMARKER (p->mark)->buffer) | |
53aad33f | 2407 | SET_PT (clip_to_bounds (BEGV, marker_position (p->mark), ZV)); |
d0d6b7c5 JB |
2408 | else |
2409 | SET_PT (ZV); | |
b0310da4 JB |
2410 | |
2411 | /* If the output marker is outside of the visible region, save | |
2412 | the restriction and widen. */ | |
2413 | if (! (BEGV <= point && point <= ZV)) | |
2414 | Fwiden (); | |
2415 | ||
2416 | /* Make sure opoint floats ahead of any new text, just as point | |
2417 | would. */ | |
d0d6b7c5 JB |
2418 | if (point <= opoint) |
2419 | opoint += nchars; | |
2420 | ||
b0310da4 JB |
2421 | /* Insert after old_begv, but before old_zv. */ |
2422 | if (point < XFASTINT (old_begv)) | |
7c6f34f0 | 2423 | XSETFASTINT (old_begv, XFASTINT (old_begv) + nchars); |
b0310da4 | 2424 | if (point <= XFASTINT (old_zv)) |
7c6f34f0 | 2425 | XSETFASTINT (old_zv, XFASTINT (old_zv) + nchars); |
b0310da4 | 2426 | |
d0d6b7c5 JB |
2427 | /* Insert before markers in case we are inserting where |
2428 | the buffer's mark is, and the user's next command is Meta-y. */ | |
2429 | insert_before_markers (chars, nchars); | |
d0d6b7c5 | 2430 | Fset_marker (p->mark, make_number (point), p->buffer); |
b0310da4 | 2431 | |
d0d6b7c5 JB |
2432 | update_mode_lines++; |
2433 | ||
b0310da4 JB |
2434 | /* If the restriction isn't what it should be, set it. */ |
2435 | if (XFASTINT (old_begv) != BEGV || XFASTINT (old_zv) != ZV) | |
2436 | Fnarrow_to_region (old_begv, old_zv); | |
2437 | ||
592ce97f | 2438 | /* Handling the process output should not deactivate the mark. */ |
30c78175 RS |
2439 | Vdeactivate_mark = odeactivate; |
2440 | ||
b0310da4 | 2441 | current_buffer->read_only = old_read_only; |
d0d6b7c5 JB |
2442 | SET_PT (opoint); |
2443 | set_buffer_internal (old); | |
2444 | } | |
2445 | #ifdef VMS | |
2446 | start_vms_process_read (vs); | |
2447 | #endif | |
2448 | return nchars; | |
2449 | } | |
2450 | ||
2451 | DEFUN ("waiting-for-user-input-p", Fwaiting_for_user_input_p, Swaiting_for_user_input_p, | |
2452 | 0, 0, 0, | |
8b4d685f | 2453 | "Returns non-nil if emacs is waiting for input from the user.\n\ |
d0d6b7c5 JB |
2454 | This is intended for use by asynchronous process output filters and sentinels.") |
2455 | () | |
2456 | { | |
8b4d685f | 2457 | return (waiting_for_user_input_p ? Qt : Qnil); |
d0d6b7c5 JB |
2458 | } |
2459 | \f | |
2460 | /* Sending data to subprocess */ | |
2461 | ||
2462 | jmp_buf send_process_frame; | |
2463 | ||
2464 | SIGTYPE | |
2465 | send_process_trap () | |
2466 | { | |
2467 | #ifdef BSD4_1 | |
2468 | sigrelse (SIGPIPE); | |
2469 | sigrelse (SIGALRM); | |
2470 | #endif /* BSD4_1 */ | |
2471 | longjmp (send_process_frame, 1); | |
2472 | } | |
2473 | ||
4556b700 RS |
2474 | /* Send some data to process PROC. |
2475 | BUF is the beginning of the data; LEN is the number of characters. | |
2476 | OBJECT is the Lisp object that the data comes from. */ | |
2477 | ||
2478 | send_process (proc, buf, len, object) | |
d0d6b7c5 JB |
2479 | Lisp_Object proc; |
2480 | char *buf; | |
2481 | int len; | |
4556b700 | 2482 | Lisp_Object object; |
d0d6b7c5 JB |
2483 | { |
2484 | /* Don't use register vars; longjmp can lose them. */ | |
2485 | int rv; | |
2486 | unsigned char *procname = XSTRING (XPROCESS (proc)->name)->data; | |
2487 | ||
d0d6b7c5 JB |
2488 | #ifdef VMS |
2489 | struct Lisp_Process *p = XPROCESS (proc); | |
2490 | VMS_PROC_STUFF *vs, *get_vms_process_pointer(); | |
2491 | #endif /* VMS */ | |
2492 | ||
2493 | if (! NILP (XPROCESS (proc)->raw_status_low)) | |
2494 | update_status (XPROCESS (proc)); | |
2495 | if (! EQ (XPROCESS (proc)->status, Qrun)) | |
2496 | error ("Process %s not running", procname); | |
2497 | ||
2498 | #ifdef VMS | |
2499 | vs = get_vms_process_pointer (p->pid); | |
2500 | if (vs == 0) | |
2501 | error ("Could not find this process: %x", p->pid); | |
2502 | else if (write_to_vms_process (vs, buf, len)) | |
2503 | ; | |
2504 | #else | |
4556b700 RS |
2505 | |
2506 | if (pty_max_bytes == 0) | |
2507 | { | |
2508 | #if defined (HAVE_FPATHCONF) && defined (_PC_MAX_CANON) | |
2509 | pty_max_bytes = fpathconf (XFASTINT (XPROCESS (proc)->outfd), | |
2510 | _PC_MAX_CANON); | |
2511 | if (pty_max_bytes < 0) | |
2512 | pty_max_bytes = 250; | |
2513 | #else | |
2514 | pty_max_bytes = 250; | |
2515 | #endif | |
2516 | /* Deduct one, to leave space for the eof. */ | |
2517 | pty_max_bytes--; | |
2518 | } | |
2519 | ||
d0d6b7c5 JB |
2520 | if (!setjmp (send_process_frame)) |
2521 | while (len > 0) | |
2522 | { | |
2523 | int this = len; | |
4746118a | 2524 | SIGTYPE (*old_sigpipe)(); |
93b4f699 RS |
2525 | int flush_pty = 0; |
2526 | ||
4556b700 RS |
2527 | /* Decide how much data we can send in one batch. |
2528 | Long lines need to be split into multiple batches. */ | |
2529 | if (!NILP (XPROCESS (proc)->pty_flag)) | |
93b4f699 | 2530 | { |
4556b700 RS |
2531 | /* Starting this at zero is always correct when not the first iteration |
2532 | because the previous iteration ended by sending C-d. | |
2533 | It may not be correct for the first iteration | |
2534 | if a partial line was sent in a separate send_process call. | |
2535 | If that proves worth handling, we need to save linepos | |
2536 | in the process object. */ | |
2537 | int linepos = 0; | |
2538 | char *ptr = buf; | |
2539 | char *end = buf + len; | |
2540 | ||
2541 | /* Scan through this text for a line that is too long. */ | |
2542 | while (ptr != end && linepos < pty_max_bytes) | |
2543 | { | |
2544 | if (*ptr == '\n') | |
2545 | linepos = 0; | |
2546 | else | |
2547 | linepos++; | |
2548 | ptr++; | |
2549 | } | |
2550 | /* If we found one, break the line there | |
2551 | and put in a C-d to force the buffer through. */ | |
2552 | this = ptr - buf; | |
93b4f699 RS |
2553 | } |
2554 | ||
4556b700 RS |
2555 | /* Send this batch, using one or more write calls. */ |
2556 | while (this > 0) | |
d0d6b7c5 | 2557 | { |
4556b700 RS |
2558 | old_sigpipe = (SIGTYPE (*) ()) signal (SIGPIPE, send_process_trap); |
2559 | rv = write (XINT (XPROCESS (proc)->outfd), buf, this); | |
2560 | signal (SIGPIPE, old_sigpipe); | |
2561 | ||
2562 | if (rv < 0) | |
2563 | { | |
2564 | if (0 | |
d0d6b7c5 | 2565 | #ifdef EWOULDBLOCK |
4556b700 | 2566 | || errno == EWOULDBLOCK |
d0d6b7c5 JB |
2567 | #endif |
2568 | #ifdef EAGAIN | |
4556b700 | 2569 | || errno == EAGAIN |
d0d6b7c5 | 2570 | #endif |
4556b700 RS |
2571 | ) |
2572 | /* Buffer is full. Wait, accepting input; | |
2573 | that may allow the program | |
2574 | to finish doing output and read more. */ | |
2575 | { | |
2576 | Lisp_Object zero; | |
2577 | int offset; | |
2578 | ||
2579 | /* Running filters might relocate buffers or strings. | |
2580 | Arrange to relocate BUF. */ | |
2581 | if (BUFFERP (object)) | |
2582 | offset = BUF_PTR_CHAR_POS (XBUFFER (object), | |
2583 | (unsigned char *) buf); | |
2584 | else if (STRINGP (object)) | |
2585 | offset = buf - (char *) XSTRING (object)->data; | |
2586 | ||
22719df2 | 2587 | XSETFASTINT (zero, 0); |
4556b700 RS |
2588 | wait_reading_process_input (1, 0, zero, 0); |
2589 | ||
2590 | if (BUFFERP (object)) | |
2591 | buf = (char *) BUF_CHAR_ADDRESS (XBUFFER (object), offset); | |
2592 | else if (STRINGP (object)) | |
2593 | buf = offset + (char *) XSTRING (object)->data; | |
2594 | ||
2595 | rv = 0; | |
2596 | } | |
2597 | else | |
2598 | /* This is a real error. */ | |
2599 | report_file_error ("writing to process", Fcons (proc, Qnil)); | |
d0d6b7c5 | 2600 | } |
4556b700 RS |
2601 | buf += rv; |
2602 | len -= rv; | |
2603 | this -= rv; | |
d0d6b7c5 | 2604 | } |
f76475ad | 2605 | |
4556b700 RS |
2606 | /* If we sent just part of the string, put in an EOF |
2607 | to force it through, before we send the rest. */ | |
2608 | if (len > 0) | |
2609 | Fprocess_send_eof (proc); | |
d0d6b7c5 JB |
2610 | } |
2611 | #endif | |
2612 | else | |
2613 | { | |
2614 | XPROCESS (proc)->raw_status_low = Qnil; | |
2615 | XPROCESS (proc)->raw_status_high = Qnil; | |
2616 | XPROCESS (proc)->status = Fcons (Qexit, Fcons (make_number (256), Qnil)); | |
2617 | XSETINT (XPROCESS (proc)->tick, ++process_tick); | |
2618 | deactivate_process (proc); | |
2619 | #ifdef VMS | |
2620 | error ("Error writing to process %s; closed it", procname); | |
2621 | #else | |
2622 | error ("SIGPIPE raised on process %s; closed it", procname); | |
2623 | #endif | |
2624 | } | |
2625 | } | |
2626 | ||
2627 | DEFUN ("process-send-region", Fprocess_send_region, Sprocess_send_region, | |
2628 | 3, 3, 0, | |
2629 | "Send current contents of region as input to PROCESS.\n\ | |
ebb9e16f JB |
2630 | PROCESS may be a process, a buffer, the name of a process or buffer, or\n\ |
2631 | nil, indicating the current buffer's process.\n\ | |
d0d6b7c5 JB |
2632 | Called from program, takes three arguments, PROCESS, START and END.\n\ |
2633 | If the region is more than 500 characters long,\n\ | |
2634 | it is sent in several bunches. This may happen even for shorter regions.\n\ | |
2635 | Output from processes can arrive in between bunches.") | |
2636 | (process, start, end) | |
2637 | Lisp_Object process, start, end; | |
2638 | { | |
2639 | Lisp_Object proc; | |
2640 | int start1; | |
2641 | ||
2642 | proc = get_process (process); | |
2643 | validate_region (&start, &end); | |
2644 | ||
2645 | if (XINT (start) < GPT && XINT (end) > GPT) | |
2646 | move_gap (start); | |
2647 | ||
2648 | start1 = XINT (start); | |
4556b700 RS |
2649 | send_process (proc, &FETCH_CHAR (start1), XINT (end) - XINT (start), |
2650 | Fcurrent_buffer ()); | |
d0d6b7c5 JB |
2651 | |
2652 | return Qnil; | |
2653 | } | |
2654 | ||
2655 | DEFUN ("process-send-string", Fprocess_send_string, Sprocess_send_string, | |
2656 | 2, 2, 0, | |
2657 | "Send PROCESS the contents of STRING as input.\n\ | |
ebb9e16f JB |
2658 | PROCESS may be a process, a buffer, the name of a process or buffer, or\n\ |
2659 | nil, indicating the current buffer's process.\n\ | |
d0d6b7c5 JB |
2660 | If STRING is more than 500 characters long,\n\ |
2661 | it is sent in several bunches. This may happen even for shorter strings.\n\ | |
2662 | Output from processes can arrive in between bunches.") | |
2663 | (process, string) | |
2664 | Lisp_Object process, string; | |
2665 | { | |
2666 | Lisp_Object proc; | |
2667 | CHECK_STRING (string, 1); | |
2668 | proc = get_process (process); | |
4556b700 | 2669 | send_process (proc, XSTRING (string)->data, XSTRING (string)->size, string); |
d0d6b7c5 JB |
2670 | return Qnil; |
2671 | } | |
2672 | \f | |
2673 | /* send a signal number SIGNO to PROCESS. | |
2674 | CURRENT_GROUP means send to the process group that currently owns | |
2675 | the terminal being used to communicate with PROCESS. | |
2676 | This is used for various commands in shell mode. | |
2677 | If NOMSG is zero, insert signal-announcements into process's buffers | |
b0310da4 JB |
2678 | right away. |
2679 | ||
2680 | If we can, we try to signal PROCESS by sending control characters | |
e333e864 | 2681 | down the pty. This allows us to signal inferiors who have changed |
b0310da4 | 2682 | their uid, for which killpg would return an EPERM error. */ |
d0d6b7c5 | 2683 | |
f9738840 | 2684 | static void |
d0d6b7c5 JB |
2685 | process_send_signal (process, signo, current_group, nomsg) |
2686 | Lisp_Object process; | |
2687 | int signo; | |
2688 | Lisp_Object current_group; | |
2689 | int nomsg; | |
2690 | { | |
2691 | Lisp_Object proc; | |
2692 | register struct Lisp_Process *p; | |
2693 | int gid; | |
2694 | int no_pgrp = 0; | |
2695 | ||
2696 | proc = get_process (process); | |
2697 | p = XPROCESS (proc); | |
2698 | ||
2699 | if (!EQ (p->childp, Qt)) | |
2700 | error ("Process %s is not a subprocess", | |
2701 | XSTRING (p->name)->data); | |
a9f2c884 | 2702 | if (XINT (p->infd) < 0) |
d0d6b7c5 JB |
2703 | error ("Process %s is not active", |
2704 | XSTRING (p->name)->data); | |
2705 | ||
2706 | if (NILP (p->pty_flag)) | |
2707 | current_group = Qnil; | |
2708 | ||
d0d6b7c5 JB |
2709 | /* If we are using pgrps, get a pgrp number and make it negative. */ |
2710 | if (!NILP (current_group)) | |
2711 | { | |
b0310da4 | 2712 | #ifdef SIGNALS_VIA_CHARACTERS |
d0d6b7c5 JB |
2713 | /* If possible, send signals to the entire pgrp |
2714 | by sending an input character to it. */ | |
b0310da4 | 2715 | |
6be429b1 JB |
2716 | /* TERMIOS is the latest and bestest, and seems most likely to |
2717 | work. If the system has it, use it. */ | |
2718 | #ifdef HAVE_TERMIOS | |
2719 | struct termios t; | |
2720 | ||
2721 | switch (signo) | |
2722 | { | |
2723 | case SIGINT: | |
a9f2c884 | 2724 | tcgetattr (XINT (p->infd), &t); |
4556b700 | 2725 | send_process (proc, &t.c_cc[VINTR], 1, Qnil); |
a87b802f | 2726 | return; |
6be429b1 JB |
2727 | |
2728 | case SIGQUIT: | |
a9f2c884 | 2729 | tcgetattr (XINT (p->infd), &t); |
4556b700 | 2730 | send_process (proc, &t.c_cc[VQUIT], 1, Qnil); |
a87b802f | 2731 | return; |
6be429b1 JB |
2732 | |
2733 | case SIGTSTP: | |
a9f2c884 | 2734 | tcgetattr (XINT (p->infd), &t); |
d0adf46f | 2735 | #if defined (VSWTCH) && !defined (PREFER_VSUSP) |
4556b700 | 2736 | send_process (proc, &t.c_cc[VSWTCH], 1, Qnil); |
6be429b1 | 2737 | #else |
4556b700 | 2738 | send_process (proc, &t.c_cc[VSUSP], 1, Qnil); |
6be429b1 | 2739 | #endif |
a87b802f | 2740 | return; |
6be429b1 JB |
2741 | } |
2742 | ||
2743 | #else /* ! HAVE_TERMIOS */ | |
2744 | ||
b0310da4 JB |
2745 | /* On Berkeley descendants, the following IOCTL's retrieve the |
2746 | current control characters. */ | |
d0d6b7c5 | 2747 | #if defined (TIOCGLTC) && defined (TIOCGETC) |
b0310da4 | 2748 | |
d0d6b7c5 JB |
2749 | struct tchars c; |
2750 | struct ltchars lc; | |
2751 | ||
2752 | switch (signo) | |
2753 | { | |
2754 | case SIGINT: | |
a9f2c884 | 2755 | ioctl (XINT (p->infd), TIOCGETC, &c); |
4556b700 | 2756 | send_process (proc, &c.t_intrc, 1, Qnil); |
f9738840 | 2757 | return; |
d0d6b7c5 | 2758 | case SIGQUIT: |
a9f2c884 | 2759 | ioctl (XINT (p->infd), TIOCGETC, &c); |
4556b700 | 2760 | send_process (proc, &c.t_quitc, 1, Qnil); |
f9738840 | 2761 | return; |
0ad77c54 | 2762 | #ifdef SIGTSTP |
d0d6b7c5 | 2763 | case SIGTSTP: |
a9f2c884 | 2764 | ioctl (XINT (p->infd), TIOCGLTC, &lc); |
4556b700 | 2765 | send_process (proc, &lc.t_suspc, 1, Qnil); |
f9738840 | 2766 | return; |
b0310da4 | 2767 | #endif /* ! defined (SIGTSTP) */ |
d0d6b7c5 | 2768 | } |
b0310da4 JB |
2769 | |
2770 | #else /* ! defined (TIOCGLTC) && defined (TIOCGETC) */ | |
2771 | ||
2772 | /* On SYSV descendants, the TCGETA ioctl retrieves the current control | |
2773 | characters. */ | |
2774 | #ifdef TCGETA | |
d0d6b7c5 JB |
2775 | struct termio t; |
2776 | switch (signo) | |
2777 | { | |
2778 | case SIGINT: | |
a9f2c884 | 2779 | ioctl (XINT (p->infd), TCGETA, &t); |
4556b700 | 2780 | send_process (proc, &t.c_cc[VINTR], 1, Qnil); |
f9738840 | 2781 | return; |
d0d6b7c5 | 2782 | case SIGQUIT: |
a9f2c884 | 2783 | ioctl (XINT (p->infd), TCGETA, &t); |
4556b700 | 2784 | send_process (proc, &t.c_cc[VQUIT], 1, Qnil); |
f9738840 | 2785 | return; |
7d79e3b4 | 2786 | #ifdef SIGTSTP |
d0d6b7c5 | 2787 | case SIGTSTP: |
a9f2c884 | 2788 | ioctl (XINT (p->infd), TCGETA, &t); |
4556b700 | 2789 | send_process (proc, &t.c_cc[VSWTCH], 1, Qnil); |
f9738840 | 2790 | return; |
b0310da4 | 2791 | #endif /* ! defined (SIGTSTP) */ |
d0d6b7c5 | 2792 | } |
b0310da4 JB |
2793 | #else /* ! defined (TCGETA) */ |
2794 | Your configuration files are messed up. | |
2795 | /* If your system configuration files define SIGNALS_VIA_CHARACTERS, | |
2796 | you'd better be using one of the alternatives above! */ | |
2797 | #endif /* ! defined (TCGETA) */ | |
2798 | #endif /* ! defined (TIOCGLTC) && defined (TIOCGETC) */ | |
6be429b1 | 2799 | #endif /* ! defined HAVE_TERMIOS */ |
b0310da4 | 2800 | #endif /* ! defined (SIGNALS_VIA_CHARACTERS) */ |
d0d6b7c5 | 2801 | |
301c3fe4 | 2802 | #ifdef TIOCGPGRP |
d0d6b7c5 JB |
2803 | /* Get the pgrp using the tty itself, if we have that. |
2804 | Otherwise, use the pty to get the pgrp. | |
2805 | On pfa systems, saka@pfu.fujitsu.co.JP writes: | |
b0310da4 JB |
2806 | "TIOCGPGRP symbol defined in sys/ioctl.h at E50. |
2807 | But, TIOCGPGRP does not work on E50 ;-P works fine on E60" | |
d0d6b7c5 JB |
2808 | His patch indicates that if TIOCGPGRP returns an error, then |
2809 | we should just assume that p->pid is also the process group id. */ | |
2810 | { | |
2811 | int err; | |
2812 | ||
2813 | if (!NILP (p->subtty)) | |
2814 | err = ioctl (XFASTINT (p->subtty), TIOCGPGRP, &gid); | |
2815 | else | |
a9f2c884 | 2816 | err = ioctl (XINT (p->infd), TIOCGPGRP, &gid); |
d0d6b7c5 JB |
2817 | |
2818 | #ifdef pfa | |
2819 | if (err == -1) | |
2820 | gid = - XFASTINT (p->pid); | |
301c3fe4 | 2821 | #endif /* ! defined (pfa) */ |
d0d6b7c5 JB |
2822 | } |
2823 | if (gid == -1) | |
2824 | no_pgrp = 1; | |
2825 | else | |
2826 | gid = - gid; | |
b0310da4 | 2827 | #else /* ! defined (TIOCGPGRP ) */ |
301c3fe4 JB |
2828 | /* Can't select pgrps on this system, so we know that |
2829 | the child itself heads the pgrp. */ | |
2830 | gid = - XFASTINT (p->pid); | |
2831 | #endif /* ! defined (TIOCGPGRP ) */ | |
d0d6b7c5 JB |
2832 | } |
2833 | else | |
2834 | gid = - XFASTINT (p->pid); | |
d0d6b7c5 JB |
2835 | |
2836 | switch (signo) | |
2837 | { | |
2838 | #ifdef SIGCONT | |
2839 | case SIGCONT: | |
2840 | p->raw_status_low = Qnil; | |
2841 | p->raw_status_high = Qnil; | |
2842 | p->status = Qrun; | |
2843 | XSETINT (p->tick, ++process_tick); | |
2844 | if (!nomsg) | |
2845 | status_notify (); | |
2846 | break; | |
301c3fe4 | 2847 | #endif /* ! defined (SIGCONT) */ |
d0d6b7c5 JB |
2848 | case SIGINT: |
2849 | #ifdef VMS | |
4556b700 | 2850 | send_process (proc, "\003", 1, Qnil); /* ^C */ |
d0d6b7c5 JB |
2851 | goto whoosh; |
2852 | #endif | |
2853 | case SIGQUIT: | |
2854 | #ifdef VMS | |
4556b700 | 2855 | send_process (proc, "\031", 1, Qnil); /* ^Y */ |
d0d6b7c5 JB |
2856 | goto whoosh; |
2857 | #endif | |
2858 | case SIGKILL: | |
2859 | #ifdef VMS | |
2860 | sys$forcex (&(XFASTINT (p->pid)), 0, 1); | |
2861 | whoosh: | |
2862 | #endif | |
a9f2c884 | 2863 | flush_pending_output (XINT (p->infd)); |
d0d6b7c5 JB |
2864 | break; |
2865 | } | |
2866 | ||
2867 | /* If we don't have process groups, send the signal to the immediate | |
2868 | subprocess. That isn't really right, but it's better than any | |
2869 | obvious alternative. */ | |
2870 | if (no_pgrp) | |
2871 | { | |
2872 | kill (XFASTINT (p->pid), signo); | |
2873 | return; | |
2874 | } | |
2875 | ||
2876 | /* gid may be a pid, or minus a pgrp's number */ | |
2877 | #ifdef TIOCSIGSEND | |
2878 | if (!NILP (current_group)) | |
a9f2c884 | 2879 | ioctl (XINT (p->infd), TIOCSIGSEND, signo); |
d0d6b7c5 JB |
2880 | else |
2881 | { | |
2882 | gid = - XFASTINT (p->pid); | |
2883 | kill (gid, signo); | |
2884 | } | |
301c3fe4 | 2885 | #else /* ! defined (TIOCSIGSEND) */ |
d0d6b7c5 | 2886 | EMACS_KILLPG (-gid, signo); |
301c3fe4 | 2887 | #endif /* ! defined (TIOCSIGSEND) */ |
d0d6b7c5 JB |
2888 | } |
2889 | ||
2890 | DEFUN ("interrupt-process", Finterrupt_process, Sinterrupt_process, 0, 2, 0, | |
2891 | "Interrupt process PROCESS. May be process or name of one.\n\ | |
ebb9e16f | 2892 | PROCESS may be a process, a buffer, or the name of a process or buffer.\n\ |
e333e864 | 2893 | nil or no arg means current buffer's process.\n\ |
d0d6b7c5 JB |
2894 | Second arg CURRENT-GROUP non-nil means send signal to\n\ |
2895 | the current process-group of the process's controlling terminal\n\ | |
2896 | rather than to the process's own process group.\n\ | |
2897 | If the process is a shell, this means interrupt current subjob\n\ | |
2898 | rather than the shell.") | |
2899 | (process, current_group) | |
2900 | Lisp_Object process, current_group; | |
2901 | { | |
2902 | process_send_signal (process, SIGINT, current_group, 0); | |
2903 | return process; | |
2904 | } | |
2905 | ||
2906 | DEFUN ("kill-process", Fkill_process, Skill_process, 0, 2, 0, | |
2907 | "Kill process PROCESS. May be process or name of one.\n\ | |
2908 | See function `interrupt-process' for more details on usage.") | |
2909 | (process, current_group) | |
2910 | Lisp_Object process, current_group; | |
2911 | { | |
2912 | process_send_signal (process, SIGKILL, current_group, 0); | |
2913 | return process; | |
2914 | } | |
2915 | ||
2916 | DEFUN ("quit-process", Fquit_process, Squit_process, 0, 2, 0, | |
2917 | "Send QUIT signal to process PROCESS. May be process or name of one.\n\ | |
2918 | See function `interrupt-process' for more details on usage.") | |
2919 | (process, current_group) | |
2920 | Lisp_Object process, current_group; | |
2921 | { | |
2922 | process_send_signal (process, SIGQUIT, current_group, 0); | |
2923 | return process; | |
2924 | } | |
2925 | ||
2926 | DEFUN ("stop-process", Fstop_process, Sstop_process, 0, 2, 0, | |
2927 | "Stop process PROCESS. May be process or name of one.\n\ | |
2928 | See function `interrupt-process' for more details on usage.") | |
2929 | (process, current_group) | |
2930 | Lisp_Object process, current_group; | |
2931 | { | |
2932 | #ifndef SIGTSTP | |
2933 | error ("no SIGTSTP support"); | |
2934 | #else | |
2935 | process_send_signal (process, SIGTSTP, current_group, 0); | |
2936 | #endif | |
2937 | return process; | |
2938 | } | |
2939 | ||
2940 | DEFUN ("continue-process", Fcontinue_process, Scontinue_process, 0, 2, 0, | |
2941 | "Continue process PROCESS. May be process or name of one.\n\ | |
2942 | See function `interrupt-process' for more details on usage.") | |
2943 | (process, current_group) | |
2944 | Lisp_Object process, current_group; | |
2945 | { | |
2946 | #ifdef SIGCONT | |
2947 | process_send_signal (process, SIGCONT, current_group, 0); | |
2948 | #else | |
2949 | error ("no SIGCONT support"); | |
2950 | #endif | |
2951 | return process; | |
2952 | } | |
2953 | ||
2954 | DEFUN ("signal-process", Fsignal_process, Ssignal_process, | |
2955 | 2, 2, "nProcess number: \nnSignal code: ", | |
4766242d RS |
2956 | "Send the process with process id PID the signal with code SIGCODE.\n\ |
2957 | PID must be an integer. The process need not be a child of this Emacs.\n\ | |
2958 | SIGCODE may be an integer, or a symbol whose name is a signal name.") | |
2959 | (pid, sigcode) | |
2960 | Lisp_Object pid, sigcode; | |
d0d6b7c5 JB |
2961 | { |
2962 | CHECK_NUMBER (pid, 0); | |
4766242d RS |
2963 | |
2964 | #define handle_signal(NAME, VALUE) \ | |
2965 | else if (!strcmp (name, NAME)) \ | |
2966 | XSETINT (sigcode, VALUE) | |
2967 | ||
2968 | if (INTEGERP (sigcode)) | |
2969 | ; | |
2970 | else | |
2971 | { | |
2972 | unsigned char *name; | |
2973 | ||
2974 | CHECK_SYMBOL (sigcode, 1); | |
2975 | name = XSYMBOL (sigcode)->name->data; | |
2976 | ||
2977 | if (0) | |
2978 | ; | |
2979 | #ifdef SIGHUP | |
2980 | handle_signal ("SIGHUP", SIGHUP); | |
2981 | #endif | |
2982 | #ifdef SIGINT | |
2983 | handle_signal ("SIGINT", SIGINT); | |
2984 | #endif | |
2985 | #ifdef SIGQUIT | |
2986 | handle_signal ("SIGQUIT", SIGQUIT); | |
2987 | #endif | |
2988 | #ifdef SIGILL | |
2989 | handle_signal ("SIGILL", SIGILL); | |
2990 | #endif | |
2991 | #ifdef SIGABRT | |
2992 | handle_signal ("SIGABRT", SIGABRT); | |
2993 | #endif | |
2994 | #ifdef SIGEMT | |
2995 | handle_signal ("SIGEMT", SIGEMT); | |
2996 | #endif | |
2997 | #ifdef SIGKILL | |
2998 | handle_signal ("SIGKILL", SIGKILL); | |
2999 | #endif | |
3000 | #ifdef SIGFPE | |
3001 | handle_signal ("SIGFPE", SIGFPE); | |
3002 | #endif | |
3003 | #ifdef SIGBUS | |
3004 | handle_signal ("SIGBUS", SIGBUS); | |
3005 | #endif | |
3006 | #ifdef SIGSEGV | |
3007 | handle_signal ("SIGSEGV", SIGSEGV); | |
3008 | #endif | |
3009 | #ifdef SIGSYS | |
3010 | handle_signal ("SIGSYS", SIGSYS); | |
3011 | #endif | |
3012 | #ifdef SIGPIPE | |
3013 | handle_signal ("SIGPIPE", SIGPIPE); | |
3014 | #endif | |
3015 | #ifdef SIGALRM | |
3016 | handle_signal ("SIGALRM", SIGALRM); | |
3017 | #endif | |
3018 | #ifdef SIGTERM | |
3019 | handle_signal ("SIGTERM", SIGTERM); | |
3020 | #endif | |
3021 | #ifdef SIGURG | |
3022 | handle_signal ("SIGURG", SIGURG); | |
3023 | #endif | |
3024 | #ifdef SIGSTOP | |
3025 | handle_signal ("SIGSTOP", SIGSTOP); | |
3026 | #endif | |
3027 | #ifdef SIGTSTP | |
3028 | handle_signal ("SIGTSTP", SIGTSTP); | |
3029 | #endif | |
3030 | #ifdef SIGCONT | |
3031 | handle_signal ("SIGCONT", SIGCONT); | |
3032 | #endif | |
3033 | #ifdef SIGCHLD | |
3034 | handle_signal ("SIGCHLD", SIGCHLD); | |
3035 | #endif | |
3036 | #ifdef SIGTTIN | |
3037 | handle_signal ("SIGTTIN", SIGTTIN); | |
3038 | #endif | |
3039 | #ifdef SIGTTOU | |
3040 | handle_signal ("SIGTTOU", SIGTTOU); | |
3041 | #endif | |
3042 | #ifdef SIGIO | |
3043 | handle_signal ("SIGIO", SIGIO); | |
3044 | #endif | |
3045 | #ifdef SIGXCPU | |
3046 | handle_signal ("SIGXCPU", SIGXCPU); | |
3047 | #endif | |
3048 | #ifdef SIGXFSZ | |
3049 | handle_signal ("SIGXFSZ", SIGXFSZ); | |
3050 | #endif | |
3051 | #ifdef SIGVTALRM | |
3052 | handle_signal ("SIGVTALRM", SIGVTALRM); | |
3053 | #endif | |
3054 | #ifdef SIGPROF | |
3055 | handle_signal ("SIGPROF", SIGPROF); | |
3056 | #endif | |
3057 | #ifdef SIGWINCH | |
3058 | handle_signal ("SIGWINCH", SIGWINCH); | |
3059 | #endif | |
3060 | #ifdef SIGINFO | |
3061 | handle_signal ("SIGINFO", SIGINFO); | |
3062 | #endif | |
3063 | #ifdef SIGUSR1 | |
3064 | handle_signal ("SIGUSR1", SIGUSR1); | |
3065 | #endif | |
3066 | #ifdef SIGUSR2 | |
3067 | handle_signal ("SIGUSR2", SIGUSR2); | |
3068 | #endif | |
3069 | else | |
9fa195a2 | 3070 | error ("Undefined signal name %s", name); |
4766242d RS |
3071 | } |
3072 | ||
3073 | #undef handle_signal | |
3074 | ||
e98d950b RS |
3075 | #ifdef WINDOWSNT |
3076 | /* Only works for kill-type signals */ | |
4766242d | 3077 | return make_number (win32_kill_process (XINT (pid), XINT (sigcode))); |
e98d950b | 3078 | #else |
4766242d | 3079 | return make_number (kill (XINT (pid), XINT (sigcode))); |
e98d950b | 3080 | #endif |
d0d6b7c5 JB |
3081 | } |
3082 | ||
3083 | DEFUN ("process-send-eof", Fprocess_send_eof, Sprocess_send_eof, 0, 1, 0, | |
3084 | "Make PROCESS see end-of-file in its input.\n\ | |
3085 | Eof comes after any text already sent to it.\n\ | |
ebb9e16f | 3086 | PROCESS may be a process, a buffer, the name of a process or buffer, or\n\ |
d33a00f2 RS |
3087 | nil, indicating the current buffer's process.\n\ |
3088 | If PROCESS is a network connection, or is a process communicating\n\ | |
3089 | through a pipe (as opposed to a pty), then you cannot send any more\n\ | |
3090 | text to PROCESS after you call this function.") | |
d0d6b7c5 JB |
3091 | (process) |
3092 | Lisp_Object process; | |
3093 | { | |
3094 | Lisp_Object proc; | |
3095 | ||
3096 | proc = get_process (process); | |
577d03d5 RS |
3097 | |
3098 | /* Make sure the process is really alive. */ | |
3099 | if (! NILP (XPROCESS (proc)->raw_status_low)) | |
3100 | update_status (XPROCESS (proc)); | |
3101 | if (! EQ (XPROCESS (proc)->status, Qrun)) | |
dcf970e6 | 3102 | error ("Process %s not running", XSTRING (XPROCESS (proc)->name)->data); |
577d03d5 | 3103 | |
d0d6b7c5 | 3104 | #ifdef VMS |
4556b700 | 3105 | send_process (proc, "\032", 1, Qnil); /* ^z */ |
d0d6b7c5 JB |
3106 | #else |
3107 | if (!NILP (XPROCESS (proc)->pty_flag)) | |
4556b700 | 3108 | send_process (proc, "\004", 1, Qnil); |
d0d6b7c5 JB |
3109 | else |
3110 | { | |
a9f2c884 | 3111 | close (XINT (XPROCESS (proc)->outfd)); |
1d056e64 | 3112 | XSETINT (XPROCESS (proc)->outfd, open (NULL_DEVICE, O_WRONLY)); |
d0d6b7c5 JB |
3113 | } |
3114 | #endif /* VMS */ | |
d0d6b7c5 JB |
3115 | return process; |
3116 | } | |
3117 | ||
3118 | /* Kill all processes associated with `buffer'. | |
3119 | If `buffer' is nil, kill all processes */ | |
3120 | ||
3121 | kill_buffer_processes (buffer) | |
3122 | Lisp_Object buffer; | |
3123 | { | |
3124 | Lisp_Object tail, proc; | |
3125 | ||
b5b502d6 | 3126 | for (tail = Vprocess_alist; GC_CONSP (tail); tail = XCONS (tail)->cdr) |
d0d6b7c5 JB |
3127 | { |
3128 | proc = XCONS (XCONS (tail)->car)->cdr; | |
b5b502d6 | 3129 | if (GC_PROCESSP (proc) |
d0d6b7c5 JB |
3130 | && (NILP (buffer) || EQ (XPROCESS (proc)->buffer, buffer))) |
3131 | { | |
3132 | if (NETCONN_P (proc)) | |
e1ab4959 | 3133 | Fdelete_process (proc); |
a9f2c884 | 3134 | else if (XINT (XPROCESS (proc)->infd) >= 0) |
d0d6b7c5 JB |
3135 | process_send_signal (proc, SIGHUP, Qnil, 1); |
3136 | } | |
3137 | } | |
3138 | } | |
3139 | \f | |
3140 | /* On receipt of a signal that a child status has changed, | |
3141 | loop asking about children with changed statuses until | |
3142 | the system says there are no more. | |
3143 | All we do is change the status; | |
3144 | we do not run sentinels or print notifications. | |
3145 | That is saved for the next time keyboard input is done, | |
3146 | in order to avoid timing errors. */ | |
3147 | ||
3148 | /** WARNING: this can be called during garbage collection. | |
3149 | Therefore, it must not be fooled by the presence of mark bits in | |
3150 | Lisp objects. */ | |
3151 | ||
3152 | /** USG WARNING: Although it is not obvious from the documentation | |
3153 | in signal(2), on a USG system the SIGCLD handler MUST NOT call | |
3154 | signal() before executing at least one wait(), otherwise the handler | |
3155 | will be called again, resulting in an infinite loop. The relevant | |
3156 | portion of the documentation reads "SIGCLD signals will be queued | |
3157 | and the signal-catching function will be continually reentered until | |
3158 | the queue is empty". Invoking signal() causes the kernel to reexamine | |
3159 | the SIGCLD queue. Fred Fish, UniSoft Systems Inc. */ | |
3160 | ||
3161 | SIGTYPE | |
3162 | sigchld_handler (signo) | |
3163 | int signo; | |
3164 | { | |
3165 | int old_errno = errno; | |
3166 | Lisp_Object proc; | |
3167 | register struct Lisp_Process *p; | |
6be429b1 | 3168 | extern EMACS_TIME *input_available_clear_time; |
d0d6b7c5 JB |
3169 | |
3170 | #ifdef BSD4_1 | |
3171 | extern int sigheld; | |
3172 | sigheld |= sigbit (SIGCHLD); | |
3173 | #endif | |
3174 | ||
3175 | while (1) | |
3176 | { | |
3177 | register int pid; | |
3178 | WAITTYPE w; | |
3179 | Lisp_Object tail; | |
3180 | ||
3181 | #ifdef WNOHANG | |
3182 | #ifndef WUNTRACED | |
3183 | #define WUNTRACED 0 | |
3184 | #endif /* no WUNTRACED */ | |
3185 | /* Keep trying to get a status until we get a definitive result. */ | |
3186 | do | |
3187 | { | |
3188 | errno = 0; | |
3189 | pid = wait3 (&w, WNOHANG | WUNTRACED, 0); | |
3190 | } | |
3191 | while (pid <= 0 && errno == EINTR); | |
3192 | ||
3193 | if (pid <= 0) | |
3194 | { | |
3195 | /* A real failure. We have done all our job, so return. */ | |
3196 | ||
3197 | /* USG systems forget handlers when they are used; | |
3198 | must reestablish each time */ | |
3199 | #ifdef USG | |
3200 | signal (signo, sigchld_handler); /* WARNING - must come after wait3() */ | |
3201 | #endif | |
3202 | #ifdef BSD4_1 | |
3203 | sigheld &= ~sigbit (SIGCHLD); | |
3204 | sigrelse (SIGCHLD); | |
3205 | #endif | |
3206 | errno = old_errno; | |
3207 | return; | |
3208 | } | |
3209 | #else | |
3210 | pid = wait (&w); | |
3211 | #endif /* no WNOHANG */ | |
3212 | ||
3213 | /* Find the process that signaled us, and record its status. */ | |
3214 | ||
3215 | p = 0; | |
3216 | for (tail = Vprocess_alist; XSYMBOL (tail) != XSYMBOL (Qnil); tail = XCONS (tail)->cdr) | |
3217 | { | |
3218 | proc = XCONS (XCONS (tail)->car)->cdr; | |
3219 | p = XPROCESS (proc); | |
3220 | if (EQ (p->childp, Qt) && XFASTINT (p->pid) == pid) | |
3221 | break; | |
3222 | p = 0; | |
3223 | } | |
3224 | ||
3225 | /* Look for an asynchronous process whose pid hasn't been filled | |
3226 | in yet. */ | |
3227 | if (p == 0) | |
3228 | for (tail = Vprocess_alist; XSYMBOL (tail) != XSYMBOL (Qnil); tail = XCONS (tail)->cdr) | |
3229 | { | |
3230 | proc = XCONS (XCONS (tail)->car)->cdr; | |
3231 | p = XPROCESS (proc); | |
bcd69aea | 3232 | if (INTEGERP (p->pid) && XINT (p->pid) == -1) |
d0d6b7c5 JB |
3233 | break; |
3234 | p = 0; | |
3235 | } | |
3236 | ||
3237 | /* Change the status of the process that was found. */ | |
3238 | if (p != 0) | |
3239 | { | |
3240 | union { int i; WAITTYPE wt; } u; | |
e98d950b | 3241 | int clear_desc_flag = 0; |
d0d6b7c5 JB |
3242 | |
3243 | XSETINT (p->tick, ++process_tick); | |
3244 | u.wt = w; | |
22719df2 KH |
3245 | XSETFASTINT (p->raw_status_low, u.i & 0xffff); |
3246 | XSETFASTINT (p->raw_status_high, u.i >> 16); | |
d0d6b7c5 JB |
3247 | |
3248 | /* If process has terminated, stop waiting for its output. */ | |
e98d950b RS |
3249 | if ((WIFSIGNALED (w) || WIFEXITED (w)) |
3250 | && XINT (p->infd) >= 0) | |
3251 | clear_desc_flag = 1; | |
3252 | ||
3253 | /* We use clear_desc_flag to avoid a compiler bug in Microsoft C. */ | |
3254 | if (clear_desc_flag) | |
3255 | { | |
3256 | FD_CLR (XINT (p->infd), &input_wait_mask); | |
3257 | FD_CLR (XINT (p->infd), &non_keyboard_wait_mask); | |
3258 | } | |
6be429b1 JB |
3259 | |
3260 | /* Tell wait_reading_process_input that it needs to wake up and | |
3261 | look around. */ | |
3262 | if (input_available_clear_time) | |
3263 | EMACS_SET_SECS_USECS (*input_available_clear_time, 0, 0); | |
d0d6b7c5 JB |
3264 | } |
3265 | ||
3266 | /* There was no asynchronous process found for that id. Check | |
3267 | if we have a synchronous process. */ | |
3268 | else | |
3269 | { | |
3270 | synch_process_alive = 0; | |
3271 | ||
3272 | /* Report the status of the synchronous process. */ | |
3273 | if (WIFEXITED (w)) | |
3274 | synch_process_retcode = WRETCODE (w); | |
3275 | else if (WIFSIGNALED (w)) | |
b97ad9ea RS |
3276 | { |
3277 | int code = WTERMSIG (w); | |
3278 | char *signame = 0; | |
3279 | ||
3280 | if (code < NSIG) | |
3281 | { | |
b0310da4 | 3282 | #ifndef VMS |
ed0cae05 RS |
3283 | /* Suppress warning if the table has const char *. */ |
3284 | signame = (char *) sys_siglist[code]; | |
b0310da4 | 3285 | #else |
b97ad9ea | 3286 | signame = sys_errlist[code]; |
b0310da4 | 3287 | #endif |
b97ad9ea RS |
3288 | } |
3289 | if (signame == 0) | |
3290 | signame = "unknown"; | |
3291 | ||
3292 | synch_process_death = signame; | |
3293 | } | |
6be429b1 JB |
3294 | |
3295 | /* Tell wait_reading_process_input that it needs to wake up and | |
3296 | look around. */ | |
3297 | if (input_available_clear_time) | |
3298 | EMACS_SET_SECS_USECS (*input_available_clear_time, 0, 0); | |
d0d6b7c5 JB |
3299 | } |
3300 | ||
3301 | /* On some systems, we must return right away. | |
3302 | If any more processes want to signal us, we will | |
3303 | get another signal. | |
3304 | Otherwise (on systems that have WNOHANG), loop around | |
3305 | to use up all the processes that have something to tell us. */ | |
e98d950b | 3306 | #if defined (USG) && ! (defined (HPUX) && defined (WNOHANG)) || defined (WINDOWSNT) |
d0d6b7c5 JB |
3307 | #ifdef USG |
3308 | signal (signo, sigchld_handler); | |
3309 | #endif | |
3310 | errno = old_errno; | |
3311 | return; | |
3312 | #endif /* USG, but not HPUX with WNOHANG */ | |
3313 | } | |
3314 | } | |
3315 | \f | |
3316 | ||
3317 | static Lisp_Object | |
3318 | exec_sentinel_unwind (data) | |
3319 | Lisp_Object data; | |
3320 | { | |
3321 | XPROCESS (XCONS (data)->car)->sentinel = XCONS (data)->cdr; | |
3322 | return Qnil; | |
3323 | } | |
3324 | ||
3b9a3dfa RS |
3325 | static Lisp_Object |
3326 | exec_sentinel_error_handler (error) | |
3327 | Lisp_Object error; | |
3328 | { | |
3329 | cmd_error_internal (error, "error in process sentinel: "); | |
3330 | Vinhibit_quit = Qt; | |
3331 | update_echo_area (); | |
833ba342 | 3332 | Fsleep_for (make_number (2), Qnil); |
3b9a3dfa RS |
3333 | } |
3334 | ||
d0d6b7c5 JB |
3335 | static void |
3336 | exec_sentinel (proc, reason) | |
3337 | Lisp_Object proc, reason; | |
3338 | { | |
dfc21838 | 3339 | Lisp_Object sentinel, obuffer, odeactivate, okeymap; |
d0d6b7c5 JB |
3340 | register struct Lisp_Process *p = XPROCESS (proc); |
3341 | int count = specpdl_ptr - specpdl; | |
3342 | ||
dfc21838 RS |
3343 | /* No need to gcpro these, because all we do with them later |
3344 | is test them for EQness, and none of them should be a string. */ | |
8fb3cf64 | 3345 | odeactivate = Vdeactivate_mark; |
dfc21838 RS |
3346 | XSETBUFFER (obuffer, current_buffer); |
3347 | okeymap = current_buffer->keymap; | |
3348 | ||
d0d6b7c5 JB |
3349 | sentinel = p->sentinel; |
3350 | if (NILP (sentinel)) | |
3351 | return; | |
3352 | ||
3353 | /* Zilch the sentinel while it's running, to avoid recursive invocations; | |
3354 | assure that it gets restored no matter how the sentinel exits. */ | |
3355 | p->sentinel = Qnil; | |
3356 | record_unwind_protect (exec_sentinel_unwind, Fcons (proc, sentinel)); | |
3357 | /* Inhibit quit so that random quits don't screw up a running filter. */ | |
3358 | specbind (Qinhibit_quit, Qt); | |
6545aada | 3359 | specbind (Qlast_nonmenu_event, Qt); |
3b9a3dfa | 3360 | |
7074fde6 | 3361 | running_asynch_code = 1; |
3b9a3dfa RS |
3362 | internal_condition_case_1 (read_process_output_call, |
3363 | Fcons (sentinel, | |
3364 | Fcons (proc, Fcons (reason, Qnil))), | |
3365 | !NILP (Vdebug_on_error) ? Qnil : Qerror, | |
3366 | exec_sentinel_error_handler); | |
7074fde6 FP |
3367 | running_asynch_code = 0; |
3368 | restore_match_data (); | |
8fb3cf64 KH |
3369 | |
3370 | Vdeactivate_mark = odeactivate; | |
dfc21838 RS |
3371 | if (! EQ (Fcurrent_buffer (), obuffer) |
3372 | || ! EQ (current_buffer->keymap, okeymap)) | |
8fb3cf64 KH |
3373 | record_asynch_buffer_change (); |
3374 | ||
8b4d685f RS |
3375 | if (waiting_for_user_input_p) |
3376 | prepare_menu_bars (); | |
2ea6d561 | 3377 | unbind_to (count, Qnil); |
d0d6b7c5 JB |
3378 | } |
3379 | ||
3380 | /* Report all recent events of a change in process status | |
3381 | (either run the sentinel or output a message). | |
3382 | This is done while Emacs is waiting for keyboard input. */ | |
3383 | ||
3384 | status_notify () | |
3385 | { | |
3386 | register Lisp_Object proc, buffer; | |
2e4149a8 | 3387 | Lisp_Object tail, msg; |
d0d6b7c5 JB |
3388 | struct gcpro gcpro1, gcpro2; |
3389 | ||
2e4149a8 KH |
3390 | tail = Qnil; |
3391 | msg = Qnil; | |
d0d6b7c5 JB |
3392 | /* We need to gcpro tail; if read_process_output calls a filter |
3393 | which deletes a process and removes the cons to which tail points | |
3394 | from Vprocess_alist, and then causes a GC, tail is an unprotected | |
3395 | reference. */ | |
3396 | GCPRO2 (tail, msg); | |
3397 | ||
3398 | for (tail = Vprocess_alist; !NILP (tail); tail = Fcdr (tail)) | |
3399 | { | |
3400 | Lisp_Object symbol; | |
3401 | register struct Lisp_Process *p; | |
3402 | ||
3403 | proc = Fcdr (Fcar (tail)); | |
3404 | p = XPROCESS (proc); | |
3405 | ||
3406 | if (XINT (p->tick) != XINT (p->update_tick)) | |
3407 | { | |
3408 | XSETINT (p->update_tick, XINT (p->tick)); | |
3409 | ||
3410 | /* If process is still active, read any output that remains. */ | |
a9f2c884 | 3411 | if (XINT (p->infd) >= 0) |
20ddfff7 | 3412 | while (! EQ (p->filter, Qt) |
a9f2c884 | 3413 | && read_process_output (proc, XINT (p->infd)) > 0); |
d0d6b7c5 JB |
3414 | |
3415 | buffer = p->buffer; | |
3416 | ||
3417 | /* Get the text to use for the message. */ | |
3418 | if (!NILP (p->raw_status_low)) | |
3419 | update_status (p); | |
3420 | msg = status_message (p->status); | |
3421 | ||
3422 | /* If process is terminated, deactivate it or delete it. */ | |
3423 | symbol = p->status; | |
bcd69aea | 3424 | if (CONSP (p->status)) |
d0d6b7c5 JB |
3425 | symbol = XCONS (p->status)->car; |
3426 | ||
3427 | if (EQ (symbol, Qsignal) || EQ (symbol, Qexit) | |
3428 | || EQ (symbol, Qclosed)) | |
3429 | { | |
3430 | if (delete_exited_processes) | |
3431 | remove_process (proc); | |
3432 | else | |
3433 | deactivate_process (proc); | |
3434 | } | |
3435 | ||
3436 | /* Now output the message suitably. */ | |
3437 | if (!NILP (p->sentinel)) | |
3438 | exec_sentinel (proc, msg); | |
3439 | /* Don't bother with a message in the buffer | |
3440 | when a process becomes runnable. */ | |
3441 | else if (!EQ (symbol, Qrun) && !NILP (buffer)) | |
3442 | { | |
2e4149a8 | 3443 | Lisp_Object ro, tem; |
d0d6b7c5 JB |
3444 | struct buffer *old = current_buffer; |
3445 | int opoint; | |
3446 | ||
2e4149a8 KH |
3447 | ro = XBUFFER (buffer)->read_only; |
3448 | ||
d0d6b7c5 JB |
3449 | /* Avoid error if buffer is deleted |
3450 | (probably that's why the process is dead, too) */ | |
3451 | if (NILP (XBUFFER (buffer)->name)) | |
3452 | continue; | |
3453 | Fset_buffer (buffer); | |
3454 | opoint = point; | |
3455 | /* Insert new output into buffer | |
3456 | at the current end-of-output marker, | |
3457 | thus preserving logical ordering of input and output. */ | |
3458 | if (XMARKER (p->mark)->buffer) | |
3459 | SET_PT (marker_position (p->mark)); | |
3460 | else | |
3461 | SET_PT (ZV); | |
3462 | if (point <= opoint) | |
3463 | opoint += XSTRING (msg)->size + XSTRING (p->name)->size + 10; | |
3464 | ||
3465 | tem = current_buffer->read_only; | |
3466 | current_buffer->read_only = Qnil; | |
3467 | insert_string ("\nProcess "); | |
3468 | Finsert (1, &p->name); | |
3469 | insert_string (" "); | |
3470 | Finsert (1, &msg); | |
3471 | current_buffer->read_only = tem; | |
3472 | Fset_marker (p->mark, make_number (point), p->buffer); | |
3473 | ||
3474 | SET_PT (opoint); | |
3475 | set_buffer_internal (old); | |
3476 | } | |
3477 | } | |
3478 | } /* end for */ | |
3479 | ||
3480 | update_mode_lines++; /* in case buffers use %s in mode-line-format */ | |
3481 | redisplay_preserve_echo_area (); | |
3482 | ||
3483 | update_tick = process_tick; | |
3484 | ||
3485 | UNGCPRO; | |
3486 | } | |
3487 | \f | |
a69281ff RS |
3488 | /* The first time this is called, assume keyboard input comes from DESC |
3489 | instead of from where we used to expect it. | |
3490 | Subsequent calls mean assume input keyboard can come from DESC | |
3491 | in addition to other places. */ | |
3492 | ||
3493 | static int add_keyboard_wait_descriptor_called_flag; | |
3494 | ||
3495 | void | |
3496 | add_keyboard_wait_descriptor (desc) | |
3497 | int desc; | |
3498 | { | |
3499 | if (! add_keyboard_wait_descriptor_called_flag) | |
3500 | FD_CLR (0, &input_wait_mask); | |
3501 | add_keyboard_wait_descriptor_called_flag = 1; | |
3502 | FD_SET (desc, &input_wait_mask); | |
3503 | if (desc > max_keyboard_desc) | |
3504 | max_keyboard_desc = desc; | |
3505 | } | |
3506 | ||
3507 | /* From now on, do not expect DESC to give keyboard input. */ | |
3508 | ||
3509 | void | |
3510 | delete_keyboard_wait_descriptor (desc) | |
3511 | int desc; | |
3512 | { | |
3513 | int fd; | |
3514 | int lim = max_keyboard_desc; | |
3515 | ||
3516 | FD_CLR (desc, &input_wait_mask); | |
3517 | ||
3518 | if (desc == max_keyboard_desc) | |
3519 | for (fd = 0; fd < lim; fd++) | |
3520 | if (FD_ISSET (fd, &input_wait_mask) | |
3521 | && !FD_ISSET (fd, &non_keyboard_wait_mask)) | |
3522 | max_keyboard_desc = fd; | |
3523 | } | |
3524 | ||
3525 | /* Return nonzero if *MASK has a bit set | |
3526 | that corresponds to one of the keyboard input descriptors. */ | |
3527 | ||
3528 | int | |
3529 | keyboard_bit_set (mask) | |
3530 | SELECT_TYPE *mask; | |
3531 | { | |
3532 | int fd; | |
3533 | ||
3534 | for (fd = 0; fd < max_keyboard_desc; fd++) | |
3535 | if (FD_ISSET (fd, mask) && FD_ISSET (fd, &input_wait_mask) | |
3536 | && !FD_ISSET (fd, &non_keyboard_wait_mask)) | |
3537 | return 1; | |
3538 | ||
3539 | return 0; | |
3540 | } | |
3541 | \f | |
d0d6b7c5 JB |
3542 | init_process () |
3543 | { | |
3544 | register int i; | |
3545 | ||
3546 | #ifdef SIGCHLD | |
3547 | #ifndef CANNOT_DUMP | |
3548 | if (! noninteractive || initialized) | |
3549 | #endif | |
3550 | signal (SIGCHLD, sigchld_handler); | |
3551 | #endif | |
3552 | ||
3553 | FD_ZERO (&input_wait_mask); | |
a69281ff | 3554 | FD_ZERO (&non_keyboard_wait_mask); |
7d0e672e | 3555 | max_process_desc = 0; |
dd2281ae | 3556 | |
a69281ff | 3557 | FD_SET (0, &input_wait_mask); |
dd2281ae | 3558 | |
d0d6b7c5 JB |
3559 | Vprocess_alist = Qnil; |
3560 | for (i = 0; i < MAXDESC; i++) | |
3561 | { | |
3562 | chan_process[i] = Qnil; | |
3563 | proc_buffered_char[i] = -1; | |
3564 | } | |
3565 | } | |
312c9964 | 3566 | |
d0d6b7c5 JB |
3567 | syms_of_process () |
3568 | { | |
d0d6b7c5 JB |
3569 | #ifdef HAVE_SOCKETS |
3570 | stream_process = intern ("stream"); | |
3571 | #endif | |
3572 | Qprocessp = intern ("processp"); | |
3573 | staticpro (&Qprocessp); | |
3574 | Qrun = intern ("run"); | |
3575 | staticpro (&Qrun); | |
3576 | Qstop = intern ("stop"); | |
3577 | staticpro (&Qstop); | |
3578 | Qsignal = intern ("signal"); | |
3579 | staticpro (&Qsignal); | |
3580 | ||
3581 | /* Qexit is already staticpro'd by syms_of_eval; don't staticpro it | |
3582 | here again. | |
3583 | ||
3584 | Qexit = intern ("exit"); | |
3585 | staticpro (&Qexit); */ | |
3586 | ||
3587 | Qopen = intern ("open"); | |
3588 | staticpro (&Qopen); | |
3589 | Qclosed = intern ("closed"); | |
3590 | staticpro (&Qclosed); | |
3591 | ||
6545aada RS |
3592 | Qlast_nonmenu_event = intern ("last-nonmenu-event"); |
3593 | staticpro (&Qlast_nonmenu_event); | |
3594 | ||
d0d6b7c5 JB |
3595 | staticpro (&Vprocess_alist); |
3596 | ||
3597 | DEFVAR_BOOL ("delete-exited-processes", &delete_exited_processes, | |
3598 | "*Non-nil means delete processes immediately when they exit.\n\ | |
3599 | nil means don't delete them until `list-processes' is run."); | |
3600 | ||
3601 | delete_exited_processes = 1; | |
3602 | ||
3603 | DEFVAR_LISP ("process-connection-type", &Vprocess_connection_type, | |
3604 | "Control type of device used to communicate with subprocesses.\n\ | |
e333e864 RS |
3605 | Values are nil to use a pipe, or t or `pty' to use a pty.\n\ |
3606 | The value has no effect if the system has no ptys or if all ptys are busy:\n\ | |
3607 | then a pipe is used in any case.\n\ | |
3608 | The value takes effect when `start-process' is called."); | |
d0d6b7c5 JB |
3609 | Vprocess_connection_type = Qt; |
3610 | ||
3611 | defsubr (&Sprocessp); | |
3612 | defsubr (&Sget_process); | |
3613 | defsubr (&Sget_buffer_process); | |
3614 | defsubr (&Sdelete_process); | |
3615 | defsubr (&Sprocess_status); | |
3616 | defsubr (&Sprocess_exit_status); | |
3617 | defsubr (&Sprocess_id); | |
3618 | defsubr (&Sprocess_name); | |
3b9a3dfa | 3619 | defsubr (&Sprocess_tty_name); |
d0d6b7c5 JB |
3620 | defsubr (&Sprocess_command); |
3621 | defsubr (&Sset_process_buffer); | |
3622 | defsubr (&Sprocess_buffer); | |
3623 | defsubr (&Sprocess_mark); | |
3624 | defsubr (&Sset_process_filter); | |
3625 | defsubr (&Sprocess_filter); | |
3626 | defsubr (&Sset_process_sentinel); | |
396df322 | 3627 | defsubr (&Sset_process_window_size); |
d0d6b7c5 JB |
3628 | defsubr (&Sprocess_sentinel); |
3629 | defsubr (&Sprocess_kill_without_query); | |
3630 | defsubr (&Slist_processes); | |
3631 | defsubr (&Sprocess_list); | |
3632 | defsubr (&Sstart_process); | |
3633 | #ifdef HAVE_SOCKETS | |
3634 | defsubr (&Sopen_network_stream); | |
3635 | #endif /* HAVE_SOCKETS */ | |
3636 | defsubr (&Saccept_process_output); | |
3637 | defsubr (&Sprocess_send_region); | |
3638 | defsubr (&Sprocess_send_string); | |
3639 | defsubr (&Sinterrupt_process); | |
3640 | defsubr (&Skill_process); | |
3641 | defsubr (&Squit_process); | |
3642 | defsubr (&Sstop_process); | |
3643 | defsubr (&Scontinue_process); | |
3644 | defsubr (&Sprocess_send_eof); | |
3645 | defsubr (&Ssignal_process); | |
3646 | defsubr (&Swaiting_for_user_input_p); | |
3647 | /* defsubr (&Sprocess_connection); */ | |
3648 | } | |
3649 | ||
6720a7fb JB |
3650 | \f |
3651 | #else /* not subprocesses */ | |
3652 | ||
3653 | #include <sys/types.h> | |
3654 | #include <errno.h> | |
3655 | ||
3656 | #include "lisp.h" | |
3657 | #include "systime.h" | |
3658 | #include "termopts.h" | |
3659 | ||
ff11dfa1 | 3660 | extern int frame_garbaged; |
6720a7fb JB |
3661 | |
3662 | ||
3663 | /* As described above, except assuming that there are no subprocesses: | |
3664 | ||
3665 | Wait for timeout to elapse and/or keyboard input to be available. | |
3666 | ||
3667 | time_limit is: | |
3668 | timeout in seconds, or | |
3669 | zero for no limit, or | |
3670 | -1 means gobble data immediately available but don't wait for any. | |
3671 | ||
f76475ad | 3672 | read_kbd is a Lisp_Object: |
6720a7fb JB |
3673 | 0 to ignore keyboard input, or |
3674 | 1 to return when input is available, or | |
3675 | -1 means caller will actually read the input, so don't throw to | |
3676 | the quit handler. | |
3677 | We know that read_kbd will never be a Lisp_Process, since | |
3678 | `subprocesses' isn't defined. | |
3679 | ||
3680 | do_display != 0 means redisplay should be done to show subprocess | |
5164ee8e | 3681 | output that arrives. |
6720a7fb | 3682 | |
eb8c3be9 | 3683 | Return true iff we received input from any process. */ |
6720a7fb JB |
3684 | |
3685 | int | |
3686 | wait_reading_process_input (time_limit, microsecs, read_kbd, do_display) | |
f76475ad JB |
3687 | int time_limit, microsecs; |
3688 | Lisp_Object read_kbd; | |
3689 | int do_display; | |
6720a7fb JB |
3690 | { |
3691 | EMACS_TIME end_time, timeout, *timeout_p; | |
3692 | int waitchannels; | |
3693 | ||
3694 | /* What does time_limit really mean? */ | |
3695 | if (time_limit || microsecs) | |
3696 | { | |
3697 | /* It's not infinite. */ | |
3698 | timeout_p = &timeout; | |
3699 | ||
3700 | if (time_limit == -1) | |
3701 | /* In fact, it's zero. */ | |
3702 | EMACS_SET_SECS_USECS (timeout, 0, 0); | |
3703 | else | |
3704 | EMACS_SET_SECS_USECS (timeout, time_limit, microsecs); | |
3705 | ||
3706 | /* How far in the future is that? */ | |
3707 | EMACS_GET_TIME (end_time); | |
3708 | EMACS_ADD_TIME (end_time, end_time, timeout); | |
3709 | } | |
3710 | else | |
3711 | /* It's infinite. */ | |
3712 | timeout_p = 0; | |
3713 | ||
99e3d726 RS |
3714 | /* This must come before stop_polling. */ |
3715 | prepare_menu_bars (); | |
3716 | ||
6720a7fb JB |
3717 | /* Turn off periodic alarms (in case they are in use) |
3718 | because the select emulator uses alarms. */ | |
3719 | stop_polling (); | |
3720 | ||
3721 | for (;;) | |
3722 | { | |
3723 | int nfds; | |
3724 | ||
f76475ad | 3725 | waitchannels = XINT (read_kbd) ? 1 : 0; |
6720a7fb JB |
3726 | |
3727 | /* If calling from keyboard input, do not quit | |
3728 | since we want to return C-g as an input character. | |
3729 | Otherwise, do pending quit if requested. */ | |
f76475ad | 3730 | if (XINT (read_kbd) >= 0) |
6720a7fb JB |
3731 | QUIT; |
3732 | ||
3733 | if (timeout_p) | |
3734 | { | |
3735 | EMACS_GET_TIME (*timeout_p); | |
3736 | EMACS_SUB_TIME (*timeout_p, end_time, *timeout_p); | |
3737 | if (EMACS_TIME_NEG_P (*timeout_p)) | |
3738 | break; | |
3739 | } | |
3740 | ||
3741 | /* Cause C-g and alarm signals to take immediate action, | |
3742 | and cause input available signals to zero out timeout. */ | |
f76475ad | 3743 | if (XINT (read_kbd) < 0) |
6720a7fb JB |
3744 | set_waiting_for_input (&timeout); |
3745 | ||
ff11dfa1 | 3746 | /* If a frame has been newly mapped and needs updating, |
6720a7fb | 3747 | reprocess its display stuff. */ |
5164ee8e | 3748 | if (frame_garbaged && do_display) |
6720a7fb JB |
3749 | redisplay_preserve_echo_area (); |
3750 | ||
f76475ad | 3751 | if (XINT (read_kbd) && detect_input_pending ()) |
6720a7fb JB |
3752 | nfds = 0; |
3753 | else | |
3754 | nfds = select (1, &waitchannels, 0, 0, timeout_p); | |
3755 | ||
3756 | /* Make C-g and alarm signals set flags again */ | |
3757 | clear_waiting_for_input (); | |
3758 | ||
3759 | /* If we woke up due to SIGWINCH, actually change size now. */ | |
3760 | do_pending_window_change (); | |
3761 | ||
3762 | if (nfds == -1) | |
3763 | { | |
3764 | /* If the system call was interrupted, then go around the | |
3765 | loop again. */ | |
3766 | if (errno == EINTR) | |
3767 | waitchannels = 0; | |
3768 | } | |
3769 | #ifdef sun | |
3770 | else if (nfds > 0 && (waitchannels & 1) && interrupt_input) | |
3771 | /* System sometimes fails to deliver SIGIO. */ | |
3772 | kill (getpid (), SIGIO); | |
3773 | #endif | |
7324d660 | 3774 | #ifdef SIGIO |
f76475ad | 3775 | if (XINT (read_kbd) && interrupt_input && (waitchannels & 1)) |
6720a7fb | 3776 | kill (0, SIGIO); |
7324d660 | 3777 | #endif |
6720a7fb JB |
3778 | |
3779 | /* If we have timed out (nfds == 0) or found some input (nfds > 0), | |
3780 | we should exit. */ | |
3781 | if (nfds >= 0) | |
3782 | break; | |
3783 | } | |
3784 | ||
a87b802f JB |
3785 | start_polling (); |
3786 | ||
6720a7fb JB |
3787 | return 0; |
3788 | } | |
3789 | ||
3790 | ||
3791 | DEFUN ("get-buffer-process", Fget_buffer_process, Sget_buffer_process, 1, 1, 0, | |
51ab806a | 3792 | /* Don't confuse make-docfile by having two doc strings for this function. |
312c9964 RS |
3793 | make-docfile does not pay attention to #if, for good reason! */ |
3794 | 0) | |
6720a7fb JB |
3795 | (name) |
3796 | register Lisp_Object name; | |
3797 | { | |
3798 | return Qnil; | |
3799 | } | |
3800 | ||
3801 | /* Kill all processes associated with `buffer'. | |
3802 | If `buffer' is nil, kill all processes. | |
3803 | Since we have no subprocesses, this does nothing. */ | |
3804 | ||
3805 | kill_buffer_processes (buffer) | |
3806 | Lisp_Object buffer; | |
3807 | { | |
3808 | } | |
3809 | ||
3810 | init_process () | |
3811 | { | |
3812 | } | |
3813 | ||
3814 | syms_of_process () | |
3815 | { | |
3816 | defsubr (&Sget_buffer_process); | |
3817 | } | |
3818 | ||
3819 | \f | |
3820 | #endif /* not subprocesses */ |