Commit | Line | Data |
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d0d6b7c5 | 1 | /* Asynchronous subprocess control for GNU Emacs. |
b062d1fe | 2 | Copyright (C) 1985, 86, 87, 88, 93, 94 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 | ||
199 | /* Number of events of change of status of a process. */ | |
dd2281ae | 200 | static int process_tick; |
d0d6b7c5 JB |
201 | |
202 | /* Number of events for which the user or sentinel has been notified. */ | |
dd2281ae | 203 | static int update_tick; |
d0d6b7c5 | 204 | |
5886acf9 | 205 | #include "sysselect.h" |
d0d6b7c5 | 206 | |
44ade2e9 RS |
207 | /* If we support X Windows, turn on the code to poll periodically |
208 | to detect C-g. It isn't actually used when doing interrupt input. */ | |
209 | #ifdef HAVE_X_WINDOWS | |
210 | #define POLL_FOR_INPUT | |
211 | #endif | |
212 | ||
a69281ff | 213 | /* Mask of bits indicating the descriptors that we wait for input on. */ |
d0d6b7c5 | 214 | |
dd2281ae RS |
215 | static SELECT_TYPE input_wait_mask; |
216 | ||
a69281ff RS |
217 | /* Mask that excludes keyboard input descriptor (s). */ |
218 | ||
219 | static SELECT_TYPE non_keyboard_wait_mask; | |
220 | ||
7d0e672e RS |
221 | /* The largest descriptor currently in use for a process object. */ |
222 | static int max_process_desc; | |
223 | ||
a69281ff RS |
224 | /* The largest descriptor currently in use for keyboard input. */ |
225 | static int max_keyboard_desc; | |
d0d6b7c5 | 226 | |
dd2281ae RS |
227 | /* Nonzero means delete a process right away if it exits. */ |
228 | static int delete_exited_processes; | |
d0d6b7c5 JB |
229 | |
230 | /* Indexed by descriptor, gives the process (if any) for that descriptor */ | |
41f3aa98 | 231 | Lisp_Object chan_process[MAXDESC]; |
d0d6b7c5 JB |
232 | |
233 | /* Alist of elements (NAME . PROCESS) */ | |
41f3aa98 | 234 | Lisp_Object Vprocess_alist; |
d0d6b7c5 JB |
235 | |
236 | /* Buffered-ahead input char from process, indexed by channel. | |
237 | -1 means empty (no char is buffered). | |
238 | Used on sys V where the only way to tell if there is any | |
239 | output from the process is to read at least one char. | |
240 | Always -1 on systems that support FIONREAD. */ | |
241 | ||
e98d950b RS |
242 | /* Don't make static; need to access externally. */ |
243 | int proc_buffered_char[MAXDESC]; | |
dd2281ae RS |
244 | |
245 | static Lisp_Object get_process (); | |
93b4f699 RS |
246 | |
247 | /* Maximum number of bytes to send to a pty without an eof. */ | |
248 | static int pty_max_bytes; | |
3b9a3dfa RS |
249 | |
250 | /* Open an available pty, returning a file descriptor. | |
251 | Return -1 on failure. | |
252 | The file name of the terminal corresponding to the pty | |
253 | is left in the variable pty_name. */ | |
254 | ||
255 | static char pty_name[24]; | |
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 | |
d0d6b7c5 JB |
365 | int |
366 | allocate_pty () | |
367 | { | |
368 | struct stat stb; | |
369 | register c, i; | |
370 | int fd; | |
371 | ||
32676c08 JB |
372 | /* Some systems name their pseudoterminals so that there are gaps in |
373 | the usual sequence - for example, on HP9000/S700 systems, there | |
374 | are no pseudoterminals with names ending in 'f'. So we wait for | |
375 | three failures in a row before deciding that we've reached the | |
376 | end of the ptys. */ | |
377 | int failed_count = 0; | |
378 | ||
d0d6b7c5 JB |
379 | #ifdef PTY_ITERATION |
380 | PTY_ITERATION | |
381 | #else | |
382 | for (c = FIRST_PTY_LETTER; c <= 'z'; c++) | |
383 | for (i = 0; i < 16; i++) | |
384 | #endif | |
385 | { | |
386 | #ifdef PTY_NAME_SPRINTF | |
387 | PTY_NAME_SPRINTF | |
d0d6b7c5 JB |
388 | #else |
389 | sprintf (pty_name, "/dev/pty%c%x", c, i); | |
d0d6b7c5 JB |
390 | #endif /* no PTY_NAME_SPRINTF */ |
391 | ||
4d7c105e RS |
392 | #ifdef PTY_OPEN |
393 | PTY_OPEN; | |
394 | #else /* no PTY_OPEN */ | |
32676c08 JB |
395 | #ifdef IRIS |
396 | /* Unusual IRIS code */ | |
397 | *ptyv = open ("/dev/ptc", O_RDWR | O_NDELAY, 0); | |
398 | if (fd < 0) | |
399 | return -1; | |
400 | if (fstat (fd, &stb) < 0) | |
d0d6b7c5 | 401 | return -1; |
4d7c105e | 402 | #else /* not IRIS */ |
32676c08 JB |
403 | if (stat (pty_name, &stb) < 0) |
404 | { | |
405 | failed_count++; | |
406 | if (failed_count >= 3) | |
407 | return -1; | |
408 | } | |
409 | else | |
410 | failed_count = 0; | |
d0d6b7c5 JB |
411 | #ifdef O_NONBLOCK |
412 | fd = open (pty_name, O_RDWR | O_NONBLOCK, 0); | |
413 | #else | |
414 | fd = open (pty_name, O_RDWR | O_NDELAY, 0); | |
415 | #endif | |
4d7c105e RS |
416 | #endif /* not IRIS */ |
417 | #endif /* no PTY_OPEN */ | |
d0d6b7c5 JB |
418 | |
419 | if (fd >= 0) | |
420 | { | |
421 | /* check to make certain that both sides are available | |
422 | this avoids a nasty yet stupid bug in rlogins */ | |
423 | #ifdef PTY_TTY_NAME_SPRINTF | |
424 | PTY_TTY_NAME_SPRINTF | |
d0d6b7c5 JB |
425 | #else |
426 | sprintf (pty_name, "/dev/tty%c%x", c, i); | |
d0d6b7c5 JB |
427 | #endif /* no PTY_TTY_NAME_SPRINTF */ |
428 | #ifndef UNIPLUS | |
429 | if (access (pty_name, 6) != 0) | |
430 | { | |
431 | close (fd); | |
fad97cbe | 432 | #if !defined(IRIS) && !defined(__sgi) |
d0d6b7c5 JB |
433 | continue; |
434 | #else | |
435 | return -1; | |
436 | #endif /* IRIS */ | |
437 | } | |
438 | #endif /* not UNIPLUS */ | |
439 | setup_pty (fd); | |
440 | return fd; | |
441 | } | |
442 | } | |
443 | return -1; | |
444 | } | |
445 | #endif /* HAVE_PTYS */ | |
446 | \f | |
447 | Lisp_Object | |
448 | make_process (name) | |
449 | Lisp_Object name; | |
450 | { | |
23d6bb9c | 451 | struct Lisp_Vector *vec; |
d0d6b7c5 JB |
452 | register Lisp_Object val, tem, name1; |
453 | register struct Lisp_Process *p; | |
454 | char suffix[10]; | |
455 | register int i; | |
456 | ||
23d6bb9c KH |
457 | vec = allocate_vectorlike ((EMACS_INT) VECSIZE (struct Lisp_Process)); |
458 | for (i = 0; i < VECSIZE (struct Lisp_Process); i++) | |
459 | vec->contents[i] = Qnil; | |
460 | vec->size = VECSIZE (struct Lisp_Process); | |
461 | p = (struct Lisp_Process *)vec; | |
462 | ||
1d056e64 KH |
463 | XSETINT (p->infd, -1); |
464 | XSETINT (p->outfd, -1); | |
22719df2 KH |
465 | XSETFASTINT (p->pid, 0); |
466 | XSETFASTINT (p->tick, 0); | |
467 | XSETFASTINT (p->update_tick, 0); | |
d0d6b7c5 JB |
468 | p->raw_status_low = Qnil; |
469 | p->raw_status_high = Qnil; | |
470 | p->status = Qrun; | |
471 | p->mark = Fmake_marker (); | |
472 | ||
473 | /* If name is already in use, modify it until it is unused. */ | |
474 | ||
475 | name1 = name; | |
476 | for (i = 1; ; i++) | |
477 | { | |
478 | tem = Fget_process (name1); | |
479 | if (NILP (tem)) break; | |
480 | sprintf (suffix, "<%d>", i); | |
481 | name1 = concat2 (name, build_string (suffix)); | |
482 | } | |
483 | name = name1; | |
484 | p->name = name; | |
23d6bb9c | 485 | XSETPROCESS (val, p); |
d0d6b7c5 JB |
486 | Vprocess_alist = Fcons (Fcons (name, val), Vprocess_alist); |
487 | return val; | |
488 | } | |
489 | ||
490 | remove_process (proc) | |
491 | register Lisp_Object proc; | |
492 | { | |
493 | register Lisp_Object pair; | |
494 | ||
495 | pair = Frassq (proc, Vprocess_alist); | |
496 | Vprocess_alist = Fdelq (pair, Vprocess_alist); | |
497 | Fset_marker (XPROCESS (proc)->mark, Qnil, Qnil); | |
498 | ||
499 | deactivate_process (proc); | |
500 | } | |
501 | \f | |
502 | DEFUN ("processp", Fprocessp, Sprocessp, 1, 1, 0, | |
503 | "Return t if OBJECT is a process.") | |
504 | (obj) | |
505 | Lisp_Object obj; | |
506 | { | |
bcd69aea | 507 | return PROCESSP (obj) ? Qt : Qnil; |
d0d6b7c5 JB |
508 | } |
509 | ||
510 | DEFUN ("get-process", Fget_process, Sget_process, 1, 1, 0, | |
511 | "Return the process named NAME, or nil if there is none.") | |
512 | (name) | |
513 | register Lisp_Object name; | |
514 | { | |
bcd69aea | 515 | if (PROCESSP (name)) |
d0d6b7c5 JB |
516 | return name; |
517 | CHECK_STRING (name, 0); | |
518 | return Fcdr (Fassoc (name, Vprocess_alist)); | |
519 | } | |
520 | ||
521 | DEFUN ("get-buffer-process", Fget_buffer_process, Sget_buffer_process, 1, 1, 0, | |
522 | "Return the (or, a) process associated with BUFFER.\n\ | |
523 | BUFFER may be a buffer or the name of one.") | |
524 | (name) | |
525 | register Lisp_Object name; | |
526 | { | |
527 | register Lisp_Object buf, tail, proc; | |
528 | ||
529 | if (NILP (name)) return Qnil; | |
530 | buf = Fget_buffer (name); | |
531 | if (NILP (buf)) return Qnil; | |
532 | ||
533 | for (tail = Vprocess_alist; !NILP (tail); tail = Fcdr (tail)) | |
534 | { | |
535 | proc = Fcdr (Fcar (tail)); | |
bcd69aea | 536 | if (PROCESSP (proc) && EQ (XPROCESS (proc)->buffer, buf)) |
d0d6b7c5 JB |
537 | return proc; |
538 | } | |
539 | return Qnil; | |
540 | } | |
541 | ||
ebb9e16f JB |
542 | /* This is how commands for the user decode process arguments. It |
543 | accepts a process, a process name, a buffer, a buffer name, or nil. | |
544 | Buffers denote the first process in the buffer, and nil denotes the | |
545 | current buffer. */ | |
d0d6b7c5 | 546 | |
77b221b1 | 547 | static Lisp_Object |
d0d6b7c5 JB |
548 | get_process (name) |
549 | register Lisp_Object name; | |
550 | { | |
1619761d KH |
551 | register Lisp_Object proc, obj; |
552 | if (STRINGP (name)) | |
553 | { | |
554 | obj = Fget_process (name); | |
555 | if (NILP (obj)) | |
556 | obj = Fget_buffer (name); | |
557 | if (NILP (obj)) | |
558 | error ("Process %s does not exist", XSTRING (name)->data); | |
559 | } | |
560 | else if (NILP (name)) | |
561 | obj = Fcurrent_buffer (); | |
d0d6b7c5 | 562 | else |
1619761d KH |
563 | obj = name; |
564 | ||
565 | /* Now obj should be either a buffer object or a process object. | |
566 | */ | |
567 | if (BUFFERP (obj)) | |
d0d6b7c5 | 568 | { |
1619761d | 569 | proc = Fget_buffer_process (obj); |
d0d6b7c5 | 570 | if (NILP (proc)) |
1619761d | 571 | error ("Buffer %s has no process", XSTRING (XBUFFER (obj)->name)->data); |
d0d6b7c5 | 572 | } |
d0d6b7c5 | 573 | else |
1619761d KH |
574 | { |
575 | CHECK_PROCESS (obj, 0); | |
576 | proc = obj; | |
577 | } | |
578 | return proc; | |
d0d6b7c5 JB |
579 | } |
580 | ||
581 | DEFUN ("delete-process", Fdelete_process, Sdelete_process, 1, 1, 0, | |
582 | "Delete PROCESS: kill it and forget about it immediately.\n\ | |
ebb9e16f JB |
583 | PROCESS may be a process, a buffer, the name of a process or buffer, or\n\ |
584 | nil, indicating the current buffer's process.") | |
d0d6b7c5 JB |
585 | (proc) |
586 | register Lisp_Object proc; | |
587 | { | |
588 | proc = get_process (proc); | |
589 | XPROCESS (proc)->raw_status_low = Qnil; | |
590 | XPROCESS (proc)->raw_status_high = Qnil; | |
591 | if (NETCONN_P (proc)) | |
592 | { | |
593 | XPROCESS (proc)->status = Fcons (Qexit, Fcons (make_number (0), Qnil)); | |
594 | XSETINT (XPROCESS (proc)->tick, ++process_tick); | |
595 | } | |
6c955bcb | 596 | else if (XINT (XPROCESS (proc)->infd) >= 0) |
d0d6b7c5 JB |
597 | { |
598 | Fkill_process (proc, Qnil); | |
599 | /* Do this now, since remove_process will make sigchld_handler do nothing. */ | |
600 | XPROCESS (proc)->status | |
601 | = Fcons (Qsignal, Fcons (make_number (SIGKILL), Qnil)); | |
602 | XSETINT (XPROCESS (proc)->tick, ++process_tick); | |
603 | status_notify (); | |
604 | } | |
605 | remove_process (proc); | |
606 | return Qnil; | |
607 | } | |
608 | \f | |
609 | DEFUN ("process-status", Fprocess_status, Sprocess_status, 1, 1, 0, | |
610 | "Return the status of PROCESS: a symbol, one of these:\n\ | |
611 | run -- for a process that is running.\n\ | |
612 | stop -- for a process stopped but continuable.\n\ | |
613 | exit -- for a process that has exited.\n\ | |
614 | signal -- for a process that has got a fatal signal.\n\ | |
615 | open -- for a network stream connection that is open.\n\ | |
616 | closed -- for a network stream connection that is closed.\n\ | |
ebb9e16f JB |
617 | nil -- if arg is a process name and no such process exists.\n\ |
618 | PROCESS may be a process, a buffer, the name of a process or buffer, or\n\ | |
619 | nil, indicating the current buffer's process.") | |
d0d6b7c5 JB |
620 | (proc) |
621 | register Lisp_Object proc; | |
622 | { | |
623 | register struct Lisp_Process *p; | |
624 | register Lisp_Object status; | |
343f4114 RS |
625 | |
626 | if (STRINGP (proc)) | |
627 | proc = Fget_process (proc); | |
628 | else | |
629 | proc = get_process (proc); | |
630 | ||
d0d6b7c5 JB |
631 | if (NILP (proc)) |
632 | return proc; | |
343f4114 | 633 | |
d0d6b7c5 JB |
634 | p = XPROCESS (proc); |
635 | if (!NILP (p->raw_status_low)) | |
636 | update_status (p); | |
637 | status = p->status; | |
bcd69aea | 638 | if (CONSP (status)) |
d0d6b7c5 JB |
639 | status = XCONS (status)->car; |
640 | if (NETCONN_P (proc)) | |
641 | { | |
642 | if (EQ (status, Qrun)) | |
643 | status = Qopen; | |
644 | else if (EQ (status, Qexit)) | |
645 | status = Qclosed; | |
646 | } | |
647 | return status; | |
648 | } | |
649 | ||
650 | DEFUN ("process-exit-status", Fprocess_exit_status, Sprocess_exit_status, | |
651 | 1, 1, 0, | |
652 | "Return the exit status of PROCESS or the signal number that killed it.\n\ | |
653 | If PROCESS has not yet exited or died, return 0.") | |
654 | (proc) | |
655 | register Lisp_Object proc; | |
656 | { | |
657 | CHECK_PROCESS (proc, 0); | |
658 | if (!NILP (XPROCESS (proc)->raw_status_low)) | |
659 | update_status (XPROCESS (proc)); | |
bcd69aea | 660 | if (CONSP (XPROCESS (proc)->status)) |
d0d6b7c5 JB |
661 | return XCONS (XCONS (XPROCESS (proc)->status)->cdr)->car; |
662 | return make_number (0); | |
663 | } | |
664 | ||
665 | DEFUN ("process-id", Fprocess_id, Sprocess_id, 1, 1, 0, | |
666 | "Return the process id of PROCESS.\n\ | |
667 | This is the pid of the Unix process which PROCESS uses or talks to.\n\ | |
668 | For a network connection, this value is nil.") | |
669 | (proc) | |
670 | register Lisp_Object proc; | |
671 | { | |
672 | CHECK_PROCESS (proc, 0); | |
673 | return XPROCESS (proc)->pid; | |
674 | } | |
675 | ||
676 | DEFUN ("process-name", Fprocess_name, Sprocess_name, 1, 1, 0, | |
677 | "Return the name of PROCESS, as a string.\n\ | |
678 | This is the name of the program invoked in PROCESS,\n\ | |
679 | possibly modified to make it unique among process names.") | |
680 | (proc) | |
681 | register Lisp_Object proc; | |
682 | { | |
683 | CHECK_PROCESS (proc, 0); | |
684 | return XPROCESS (proc)->name; | |
685 | } | |
686 | ||
687 | DEFUN ("process-command", Fprocess_command, Sprocess_command, 1, 1, 0, | |
688 | "Return the command that was executed to start PROCESS.\n\ | |
689 | This is a list of strings, the first string being the program executed\n\ | |
690 | and the rest of the strings being the arguments given to it.\n\ | |
691 | For a non-child channel, this is nil.") | |
692 | (proc) | |
693 | register Lisp_Object proc; | |
694 | { | |
695 | CHECK_PROCESS (proc, 0); | |
696 | return XPROCESS (proc)->command; | |
697 | } | |
698 | ||
3b9a3dfa RS |
699 | DEFUN ("process-tty-name", Fprocess_tty_name, Sprocess_tty_name, 1, 1, 0, |
700 | "Return the name of the terminal PROCESS uses, or nil if none.\n\ | |
701 | This is the terminal that the process itself reads and writes on,\n\ | |
702 | not the name of the pty that Emacs uses to talk with that terminal.") | |
703 | (proc) | |
704 | register Lisp_Object proc; | |
705 | { | |
706 | CHECK_PROCESS (proc, 0); | |
707 | return XPROCESS (proc)->tty_name; | |
708 | } | |
709 | ||
d0d6b7c5 JB |
710 | DEFUN ("set-process-buffer", Fset_process_buffer, Sset_process_buffer, |
711 | 2, 2, 0, | |
712 | "Set buffer associated with PROCESS to BUFFER (a buffer, or nil).") | |
713 | (proc, buffer) | |
714 | register Lisp_Object proc, buffer; | |
715 | { | |
716 | CHECK_PROCESS (proc, 0); | |
717 | if (!NILP (buffer)) | |
718 | CHECK_BUFFER (buffer, 1); | |
719 | XPROCESS (proc)->buffer = buffer; | |
720 | return buffer; | |
721 | } | |
722 | ||
723 | DEFUN ("process-buffer", Fprocess_buffer, Sprocess_buffer, | |
724 | 1, 1, 0, | |
725 | "Return the buffer PROCESS is associated with.\n\ | |
726 | Output from PROCESS is inserted in this buffer\n\ | |
727 | unless PROCESS has a filter.") | |
728 | (proc) | |
729 | register Lisp_Object proc; | |
730 | { | |
731 | CHECK_PROCESS (proc, 0); | |
732 | return XPROCESS (proc)->buffer; | |
733 | } | |
734 | ||
735 | DEFUN ("process-mark", Fprocess_mark, Sprocess_mark, | |
736 | 1, 1, 0, | |
737 | "Return the marker for the end of the last output from PROCESS.") | |
738 | (proc) | |
739 | register Lisp_Object proc; | |
740 | { | |
741 | CHECK_PROCESS (proc, 0); | |
742 | return XPROCESS (proc)->mark; | |
743 | } | |
744 | ||
745 | DEFUN ("set-process-filter", Fset_process_filter, Sset_process_filter, | |
746 | 2, 2, 0, | |
747 | "Give PROCESS the filter function FILTER; nil means no filter.\n\ | |
20ddfff7 | 748 | t means stop accepting output from the process.\n\ |
d0d6b7c5 JB |
749 | When a process has a filter, each time it does output\n\ |
750 | the entire string of output is passed to the filter.\n\ | |
751 | The filter gets two arguments: the process and the string of output.\n\ | |
752 | If the process has a filter, its buffer is not used for output.") | |
753 | (proc, filter) | |
754 | register Lisp_Object proc, filter; | |
755 | { | |
756 | CHECK_PROCESS (proc, 0); | |
20ddfff7 | 757 | if (EQ (filter, Qt)) |
a69281ff RS |
758 | { |
759 | FD_CLR (XINT (XPROCESS (proc)->infd), &input_wait_mask); | |
760 | FD_CLR (XINT (XPROCESS (proc)->infd), &non_keyboard_wait_mask); | |
761 | } | |
20ddfff7 | 762 | else if (EQ (XPROCESS (proc)->filter, Qt)) |
a69281ff RS |
763 | { |
764 | FD_SET (XINT (XPROCESS (proc)->infd), &input_wait_mask); | |
765 | FD_SET (XINT (XPROCESS (proc)->infd), &non_keyboard_wait_mask); | |
766 | } | |
d0d6b7c5 JB |
767 | XPROCESS (proc)->filter = filter; |
768 | return filter; | |
769 | } | |
770 | ||
771 | DEFUN ("process-filter", Fprocess_filter, Sprocess_filter, | |
772 | 1, 1, 0, | |
773 | "Returns the filter function of PROCESS; nil if none.\n\ | |
774 | See `set-process-filter' for more info on filter functions.") | |
775 | (proc) | |
776 | register Lisp_Object proc; | |
777 | { | |
778 | CHECK_PROCESS (proc, 0); | |
779 | return XPROCESS (proc)->filter; | |
780 | } | |
781 | ||
782 | DEFUN ("set-process-sentinel", Fset_process_sentinel, Sset_process_sentinel, | |
783 | 2, 2, 0, | |
784 | "Give PROCESS the sentinel SENTINEL; nil for none.\n\ | |
785 | The sentinel is called as a function when the process changes state.\n\ | |
786 | It gets two arguments: the process, and a string describing the change.") | |
787 | (proc, sentinel) | |
788 | register Lisp_Object proc, sentinel; | |
789 | { | |
790 | CHECK_PROCESS (proc, 0); | |
791 | XPROCESS (proc)->sentinel = sentinel; | |
792 | return sentinel; | |
793 | } | |
794 | ||
795 | DEFUN ("process-sentinel", Fprocess_sentinel, Sprocess_sentinel, | |
796 | 1, 1, 0, | |
797 | "Return the sentinel of PROCESS; nil if none.\n\ | |
798 | See `set-process-sentinel' for more info on sentinels.") | |
799 | (proc) | |
800 | register Lisp_Object proc; | |
801 | { | |
802 | CHECK_PROCESS (proc, 0); | |
803 | return XPROCESS (proc)->sentinel; | |
804 | } | |
805 | ||
396df322 RS |
806 | DEFUN ("set-process-window-size", Fset_process_window_size, |
807 | Sset_process_window_size, 3, 3, 0, | |
808 | "Tell PROCESS that it has logical window size HEIGHT and WIDTH.") | |
809 | (proc, height, width) | |
810 | register Lisp_Object proc, height, width; | |
811 | { | |
812 | CHECK_PROCESS (proc, 0); | |
813 | CHECK_NATNUM (height, 0); | |
814 | CHECK_NATNUM (width, 0); | |
815 | if (set_window_size (XINT (XPROCESS (proc)->infd), | |
816 | XINT (height), XINT(width)) <= 0) | |
817 | return Qnil; | |
818 | else | |
819 | return Qt; | |
820 | } | |
821 | ||
d0d6b7c5 JB |
822 | DEFUN ("process-kill-without-query", Fprocess_kill_without_query, |
823 | Sprocess_kill_without_query, 1, 2, 0, | |
824 | "Say no query needed if PROCESS is running when Emacs is exited.\n\ | |
f2d2dbfe | 825 | Optional second argument if non-nil says to require a query.\n\ |
d0d6b7c5 JB |
826 | Value is t if a query was formerly required.") |
827 | (proc, value) | |
828 | register Lisp_Object proc, value; | |
829 | { | |
830 | Lisp_Object tem; | |
831 | ||
832 | CHECK_PROCESS (proc, 0); | |
833 | tem = XPROCESS (proc)->kill_without_query; | |
834 | XPROCESS (proc)->kill_without_query = Fnull (value); | |
835 | ||
836 | return Fnull (tem); | |
837 | } | |
312c9964 RS |
838 | |
839 | #if 0 /* Turned off because we don't currently record this info | |
840 | in the process. Perhaps add it. */ | |
841 | DEFUN ("process-connection", Fprocess_connection, Sprocess_connection, 1, 1, 0, | |
842 | "Return the connection type of `PROCESS'.\n\ | |
843 | The value is `nil' for a pipe,\n\ | |
844 | `t' or `pty' for a pty, or `stream' for a socket connection.") | |
845 | (process) | |
846 | Lisp_Object process; | |
847 | { | |
848 | return XPROCESS (process)->type; | |
849 | } | |
850 | #endif | |
d0d6b7c5 JB |
851 | \f |
852 | Lisp_Object | |
853 | list_processes_1 () | |
854 | { | |
855 | register Lisp_Object tail, tem; | |
856 | Lisp_Object proc, minspace, tem1; | |
857 | register struct buffer *old = current_buffer; | |
858 | register struct Lisp_Process *p; | |
859 | register int state; | |
860 | char tembuf[80]; | |
861 | ||
22719df2 | 862 | XSETFASTINT (minspace, 1); |
d0d6b7c5 JB |
863 | |
864 | set_buffer_internal (XBUFFER (Vstandard_output)); | |
865 | Fbuffer_disable_undo (Vstandard_output); | |
866 | ||
867 | current_buffer->truncate_lines = Qt; | |
868 | ||
869 | write_string ("\ | |
a9fde32e KH |
870 | Proc Status Buffer Tty Command\n\ |
871 | ---- ------ ------ --- -------\n", -1); | |
d0d6b7c5 JB |
872 | |
873 | for (tail = Vprocess_alist; !NILP (tail); tail = Fcdr (tail)) | |
874 | { | |
875 | Lisp_Object symbol; | |
876 | ||
877 | proc = Fcdr (Fcar (tail)); | |
878 | p = XPROCESS (proc); | |
879 | if (NILP (p->childp)) | |
880 | continue; | |
881 | ||
882 | Finsert (1, &p->name); | |
883 | Findent_to (make_number (13), minspace); | |
884 | ||
885 | if (!NILP (p->raw_status_low)) | |
886 | update_status (p); | |
887 | symbol = p->status; | |
bcd69aea | 888 | if (CONSP (p->status)) |
d0d6b7c5 JB |
889 | symbol = XCONS (p->status)->car; |
890 | ||
891 | ||
892 | if (EQ (symbol, Qsignal)) | |
893 | { | |
894 | Lisp_Object tem; | |
895 | tem = Fcar (Fcdr (p->status)); | |
896 | #ifdef VMS | |
897 | if (XINT (tem) < NSIG) | |
b0310da4 | 898 | write_string (sys_errlist [XINT (tem)], -1); |
d0d6b7c5 JB |
899 | else |
900 | #endif | |
901 | Fprinc (symbol, Qnil); | |
902 | } | |
903 | else if (NETCONN_P (proc)) | |
904 | { | |
905 | if (EQ (symbol, Qrun)) | |
906 | write_string ("open", -1); | |
907 | else if (EQ (symbol, Qexit)) | |
908 | write_string ("closed", -1); | |
909 | else | |
910 | Fprinc (symbol, Qnil); | |
911 | } | |
912 | else | |
913 | Fprinc (symbol, Qnil); | |
914 | ||
915 | if (EQ (symbol, Qexit)) | |
916 | { | |
917 | Lisp_Object tem; | |
918 | tem = Fcar (Fcdr (p->status)); | |
919 | if (XFASTINT (tem)) | |
920 | { | |
921 | sprintf (tembuf, " %d", XFASTINT (tem)); | |
922 | write_string (tembuf, -1); | |
923 | } | |
924 | } | |
925 | ||
926 | if (EQ (symbol, Qsignal) || EQ (symbol, Qexit)) | |
927 | remove_process (proc); | |
928 | ||
929 | Findent_to (make_number (22), minspace); | |
930 | if (NILP (p->buffer)) | |
931 | insert_string ("(none)"); | |
932 | else if (NILP (XBUFFER (p->buffer)->name)) | |
933 | insert_string ("(Killed)"); | |
934 | else | |
935 | Finsert (1, &XBUFFER (p->buffer)->name); | |
936 | ||
937 | Findent_to (make_number (37), minspace); | |
938 | ||
a9fde32e KH |
939 | if (STRINGP (p->tty_name)) |
940 | Finsert (1, &p->tty_name); | |
941 | else | |
942 | insert_string ("(none)"); | |
943 | ||
944 | Findent_to (make_number (49), minspace); | |
945 | ||
d0d6b7c5 JB |
946 | if (NETCONN_P (proc)) |
947 | { | |
948 | sprintf (tembuf, "(network stream connection to %s)\n", | |
949 | XSTRING (p->childp)->data); | |
950 | insert_string (tembuf); | |
951 | } | |
952 | else | |
953 | { | |
954 | tem = p->command; | |
955 | while (1) | |
956 | { | |
957 | tem1 = Fcar (tem); | |
958 | Finsert (1, &tem1); | |
959 | tem = Fcdr (tem); | |
960 | if (NILP (tem)) | |
961 | break; | |
962 | insert_string (" "); | |
963 | } | |
964 | insert_string ("\n"); | |
965 | } | |
966 | } | |
967 | return Qnil; | |
968 | } | |
969 | ||
970 | DEFUN ("list-processes", Flist_processes, Slist_processes, 0, 0, "", | |
971 | "Display a list of all processes.\n\ | |
972 | \(Any processes listed as Exited or Signaled are actually eliminated\n\ | |
973 | after the listing is made.)") | |
974 | () | |
975 | { | |
976 | internal_with_output_to_temp_buffer ("*Process List*", | |
977 | list_processes_1, Qnil); | |
978 | return Qnil; | |
979 | } | |
980 | ||
981 | DEFUN ("process-list", Fprocess_list, Sprocess_list, 0, 0, 0, | |
982 | "Return a list of all processes.") | |
983 | () | |
984 | { | |
985 | return Fmapcar (Qcdr, Vprocess_alist); | |
986 | } | |
987 | \f | |
b0310da4 JB |
988 | /* Starting asynchronous inferior processes. */ |
989 | ||
990 | static Lisp_Object start_process_unwind (); | |
991 | ||
d0d6b7c5 JB |
992 | DEFUN ("start-process", Fstart_process, Sstart_process, 3, MANY, 0, |
993 | "Start a program in a subprocess. Return the process object for it.\n\ | |
994 | Args are NAME BUFFER PROGRAM &rest PROGRAM-ARGS\n\ | |
995 | NAME is name for process. It is modified if necessary to make it unique.\n\ | |
996 | BUFFER is the buffer or (buffer-name) to associate with the process.\n\ | |
997 | Process output goes at end of that buffer, unless you specify\n\ | |
998 | an output stream or filter function to handle the output.\n\ | |
999 | BUFFER may be also nil, meaning that this process is not associated\n\ | |
1000 | with any buffer\n\ | |
1001 | Third arg is program file name. It is searched for as in the shell.\n\ | |
1002 | Remaining arguments are strings to give program as arguments.") | |
1003 | (nargs, args) | |
1004 | int nargs; | |
1005 | register Lisp_Object *args; | |
1006 | { | |
1e30af70 | 1007 | Lisp_Object buffer, name, program, proc, current_dir, tem; |
d0d6b7c5 JB |
1008 | #ifdef VMS |
1009 | register unsigned char *new_argv; | |
1010 | int len; | |
1011 | #else | |
1012 | register unsigned char **new_argv; | |
1013 | #endif | |
1014 | register int i; | |
b0310da4 | 1015 | int count = specpdl_ptr - specpdl; |
d0d6b7c5 JB |
1016 | |
1017 | buffer = args[1]; | |
1018 | if (!NILP (buffer)) | |
1019 | buffer = Fget_buffer_create (buffer); | |
1020 | ||
1e30af70 JB |
1021 | /* Make sure that the child will be able to chdir to the current |
1022 | buffer's current directory, or its unhandled equivalent. We | |
1023 | can't just have the child check for an error when it does the | |
1024 | chdir, since it's in a vfork. | |
1025 | ||
1026 | We have to GCPRO around this because Fexpand_file_name and | |
1027 | Funhandled_file_name_directory might call a file name handling | |
1028 | function. The argument list is protected by the caller, so all | |
1029 | we really have to worry about is buffer. */ | |
1030 | { | |
1031 | struct gcpro gcpro1, gcpro2; | |
1032 | ||
1033 | current_dir = current_buffer->directory; | |
1034 | ||
1035 | GCPRO2 (buffer, current_dir); | |
1036 | ||
1037 | current_dir = | |
1038 | expand_and_dir_to_file | |
82df4891 | 1039 | (Funhandled_file_name_directory (current_dir), Qnil); |
1e30af70 JB |
1040 | if (NILP (Ffile_accessible_directory_p (current_dir))) |
1041 | report_file_error ("Setting current directory", | |
1042 | Fcons (current_buffer->directory, Qnil)); | |
1043 | ||
1044 | UNGCPRO; | |
1045 | } | |
1046 | ||
d0d6b7c5 JB |
1047 | name = args[0]; |
1048 | CHECK_STRING (name, 0); | |
1049 | ||
1050 | program = args[2]; | |
1051 | ||
1052 | CHECK_STRING (program, 2); | |
1053 | ||
1054 | #ifdef VMS | |
1055 | /* Make a one member argv with all args concatenated | |
1056 | together separated by a blank. */ | |
1057 | len = XSTRING (program)->size + 2; | |
1058 | for (i = 3; i < nargs; i++) | |
1059 | { | |
1060 | tem = args[i]; | |
1061 | CHECK_STRING (tem, i); | |
1062 | len += XSTRING (tem)->size + 1; /* count the blank */ | |
1063 | } | |
1064 | new_argv = (unsigned char *) alloca (len); | |
1065 | strcpy (new_argv, XSTRING (program)->data); | |
1066 | for (i = 3; i < nargs; i++) | |
1067 | { | |
1068 | tem = args[i]; | |
1069 | CHECK_STRING (tem, i); | |
1070 | strcat (new_argv, " "); | |
1071 | strcat (new_argv, XSTRING (tem)->data); | |
1072 | } | |
b0310da4 JB |
1073 | /* Need to add code here to check for program existence on VMS */ |
1074 | ||
d0d6b7c5 JB |
1075 | #else /* not VMS */ |
1076 | new_argv = (unsigned char **) alloca ((nargs - 1) * sizeof (char *)); | |
1077 | ||
d0d6b7c5 | 1078 | /* If program file name is not absolute, search our path for it */ |
e98d950b RS |
1079 | if (!IS_DIRECTORY_SEP (XSTRING (program)->data[0]) |
1080 | && !(XSTRING (program)->size > 1 | |
1081 | && IS_DEVICE_SEP (XSTRING (program)->data[1]))) | |
d0d6b7c5 | 1082 | { |
3b639868 KH |
1083 | struct gcpro gcpro1, gcpro2, gcpro3, gcpro4; |
1084 | ||
d0d6b7c5 | 1085 | tem = Qnil; |
3b639868 | 1086 | GCPRO4 (name, program, buffer, current_dir); |
5437e9f9 | 1087 | openp (Vexec_path, program, EXEC_SUFFIXES, &tem, 1); |
3b639868 | 1088 | UNGCPRO; |
d0d6b7c5 JB |
1089 | if (NILP (tem)) |
1090 | report_file_error ("Searching for program", Fcons (program, Qnil)); | |
1091 | new_argv[0] = XSTRING (tem)->data; | |
1092 | } | |
3b639868 KH |
1093 | else |
1094 | new_argv[0] = XSTRING (program)->data; | |
1095 | ||
1096 | for (i = 3; i < nargs; i++) | |
1097 | { | |
1098 | tem = args[i]; | |
1099 | CHECK_STRING (tem, i); | |
1100 | new_argv[i - 2] = XSTRING (tem)->data; | |
1101 | } | |
1102 | new_argv[i - 2] = 0; | |
d0d6b7c5 JB |
1103 | #endif /* not VMS */ |
1104 | ||
1105 | proc = make_process (name); | |
b0310da4 JB |
1106 | /* If an error occurs and we can't start the process, we want to |
1107 | remove it from the process list. This means that each error | |
1108 | check in create_process doesn't need to call remove_process | |
1109 | itself; it's all taken care of here. */ | |
1110 | record_unwind_protect (start_process_unwind, proc); | |
d0d6b7c5 JB |
1111 | |
1112 | XPROCESS (proc)->childp = Qt; | |
1113 | XPROCESS (proc)->command_channel_p = Qnil; | |
1114 | XPROCESS (proc)->buffer = buffer; | |
1115 | XPROCESS (proc)->sentinel = Qnil; | |
1116 | XPROCESS (proc)->filter = Qnil; | |
1117 | XPROCESS (proc)->command = Flist (nargs - 2, args + 2); | |
1118 | ||
1e30af70 | 1119 | create_process (proc, new_argv, current_dir); |
d0d6b7c5 | 1120 | |
b0310da4 | 1121 | return unbind_to (count, proc); |
d0d6b7c5 JB |
1122 | } |
1123 | ||
b0310da4 JB |
1124 | /* This function is the unwind_protect form for Fstart_process. If |
1125 | PROC doesn't have its pid set, then we know someone has signalled | |
1126 | an error and the process wasn't started successfully, so we should | |
1127 | remove it from the process list. */ | |
1128 | static Lisp_Object | |
1129 | start_process_unwind (proc) | |
1130 | Lisp_Object proc; | |
1131 | { | |
bcd69aea | 1132 | if (!PROCESSP (proc)) |
b0310da4 JB |
1133 | abort (); |
1134 | ||
1135 | /* Was PROC started successfully? */ | |
188d6c4e | 1136 | if (XINT (XPROCESS (proc)->pid) <= 0) |
b0310da4 JB |
1137 | remove_process (proc); |
1138 | ||
1139 | return Qnil; | |
1140 | } | |
1141 | ||
1142 | ||
d0d6b7c5 JB |
1143 | SIGTYPE |
1144 | create_process_1 (signo) | |
1145 | int signo; | |
1146 | { | |
1147 | #ifdef USG | |
1148 | /* USG systems forget handlers when they are used; | |
1149 | must reestablish each time */ | |
1150 | signal (signo, create_process_1); | |
1151 | #endif /* USG */ | |
1152 | } | |
1153 | ||
1154 | #if 0 /* This doesn't work; see the note before sigchld_handler. */ | |
1155 | #ifdef USG | |
1156 | #ifdef SIGCHLD | |
1157 | /* Mimic blocking of signals on system V, which doesn't really have it. */ | |
1158 | ||
1159 | /* Nonzero means we got a SIGCHLD when it was supposed to be blocked. */ | |
1160 | int sigchld_deferred; | |
1161 | ||
1162 | SIGTYPE | |
1163 | create_process_sigchld () | |
1164 | { | |
1165 | signal (SIGCHLD, create_process_sigchld); | |
1166 | ||
1167 | sigchld_deferred = 1; | |
1168 | } | |
1169 | #endif | |
1170 | #endif | |
1171 | #endif | |
1172 | ||
1173 | #ifndef VMS /* VMS version of this function is in vmsproc.c. */ | |
1e30af70 | 1174 | create_process (process, new_argv, current_dir) |
d0d6b7c5 JB |
1175 | Lisp_Object process; |
1176 | char **new_argv; | |
1e30af70 | 1177 | Lisp_Object current_dir; |
d0d6b7c5 JB |
1178 | { |
1179 | int pid, inchannel, outchannel, forkin, forkout; | |
1180 | int sv[2]; | |
1181 | #ifdef SIGCHLD | |
1182 | SIGTYPE (*sigchld)(); | |
1183 | #endif | |
1184 | int pty_flag = 0; | |
d0d6b7c5 JB |
1185 | extern char **environ; |
1186 | ||
d0d6b7c5 JB |
1187 | inchannel = outchannel = -1; |
1188 | ||
1189 | #ifdef HAVE_PTYS | |
fe45da4e | 1190 | if (!NILP (Vprocess_connection_type)) |
d0d6b7c5 JB |
1191 | outchannel = inchannel = allocate_pty (); |
1192 | ||
d0d6b7c5 JB |
1193 | if (inchannel >= 0) |
1194 | { | |
1195 | #ifndef USG | |
1196 | /* On USG systems it does not work to open the pty's tty here | |
1197 | and then close and reopen it in the child. */ | |
1198 | #ifdef O_NOCTTY | |
1199 | /* Don't let this terminal become our controlling terminal | |
1200 | (in case we don't have one). */ | |
1201 | forkout = forkin = open (pty_name, O_RDWR | O_NOCTTY, 0); | |
1202 | #else | |
1203 | forkout = forkin = open (pty_name, O_RDWR, 0); | |
1204 | #endif | |
1205 | if (forkin < 0) | |
1206 | report_file_error ("Opening pty", Qnil); | |
1207 | #else | |
1208 | forkin = forkout = -1; | |
1209 | #endif /* not USG */ | |
1210 | pty_flag = 1; | |
1211 | } | |
1212 | else | |
1213 | #endif /* HAVE_PTYS */ | |
1214 | #ifdef SKTPAIR | |
1215 | { | |
1216 | if (socketpair (AF_UNIX, SOCK_STREAM, 0, sv) < 0) | |
1217 | report_file_error ("Opening socketpair", Qnil); | |
1218 | outchannel = inchannel = sv[0]; | |
1219 | forkout = forkin = sv[1]; | |
1220 | } | |
1221 | #else /* not SKTPAIR */ | |
1222 | { | |
e98d950b RS |
1223 | #ifdef WINDOWSNT |
1224 | pipe_with_inherited_out (sv); | |
1225 | inchannel = sv[0]; | |
1226 | forkout = sv[1]; | |
1227 | ||
1228 | pipe_with_inherited_in (sv); | |
1229 | forkin = sv[0]; | |
1230 | outchannel = sv[1]; | |
1231 | #else /* not WINDOWSNT */ | |
d0d6b7c5 JB |
1232 | pipe (sv); |
1233 | inchannel = sv[0]; | |
1234 | forkout = sv[1]; | |
1235 | pipe (sv); | |
1236 | outchannel = sv[1]; | |
1237 | forkin = sv[0]; | |
e98d950b | 1238 | #endif /* not WINDOWSNT */ |
d0d6b7c5 JB |
1239 | } |
1240 | #endif /* not SKTPAIR */ | |
1241 | ||
1242 | #if 0 | |
1243 | /* Replaced by close_process_descs */ | |
1244 | set_exclusive_use (inchannel); | |
1245 | set_exclusive_use (outchannel); | |
1246 | #endif | |
1247 | ||
1248 | /* Stride people say it's a mystery why this is needed | |
1249 | as well as the O_NDELAY, but that it fails without this. */ | |
1250 | #if defined (STRIDE) || (defined (pfa) && defined (HAVE_PTYS)) | |
1251 | { | |
1252 | int one = 1; | |
1253 | ioctl (inchannel, FIONBIO, &one); | |
1254 | } | |
1255 | #endif | |
1256 | ||
1257 | #ifdef O_NONBLOCK | |
1258 | fcntl (inchannel, F_SETFL, O_NONBLOCK); | |
1259 | #else | |
1260 | #ifdef O_NDELAY | |
1261 | fcntl (inchannel, F_SETFL, O_NDELAY); | |
1262 | #endif | |
1263 | #endif | |
1264 | ||
1265 | /* Record this as an active process, with its channels. | |
1266 | As a result, child_setup will close Emacs's side of the pipes. */ | |
1267 | chan_process[inchannel] = process; | |
1d056e64 KH |
1268 | XSETINT (XPROCESS (process)->infd, inchannel); |
1269 | XSETINT (XPROCESS (process)->outfd, outchannel); | |
d0d6b7c5 JB |
1270 | /* Record the tty descriptor used in the subprocess. */ |
1271 | if (forkin < 0) | |
1272 | XPROCESS (process)->subtty = Qnil; | |
1273 | else | |
22719df2 | 1274 | XSETFASTINT (XPROCESS (process)->subtty, forkin); |
d0d6b7c5 JB |
1275 | XPROCESS (process)->pty_flag = (pty_flag ? Qt : Qnil); |
1276 | XPROCESS (process)->status = Qrun; | |
1277 | ||
1278 | /* Delay interrupts until we have a chance to store | |
1279 | the new fork's pid in its process structure */ | |
1280 | #ifdef SIGCHLD | |
1281 | #ifdef BSD4_1 | |
1282 | sighold (SIGCHLD); | |
1283 | #else /* not BSD4_1 */ | |
1284 | #if defined (BSD) || defined (UNIPLUS) || defined (HPUX) | |
1285 | sigsetmask (sigmask (SIGCHLD)); | |
1286 | #else /* ordinary USG */ | |
1287 | #if 0 | |
1288 | sigchld_deferred = 0; | |
1289 | sigchld = signal (SIGCHLD, create_process_sigchld); | |
1290 | #endif | |
1291 | #endif /* ordinary USG */ | |
1292 | #endif /* not BSD4_1 */ | |
1293 | #endif /* SIGCHLD */ | |
1294 | ||
3081bf8d | 1295 | FD_SET (inchannel, &input_wait_mask); |
a69281ff | 1296 | FD_SET (inchannel, &non_keyboard_wait_mask); |
3081bf8d KH |
1297 | if (inchannel > max_process_desc) |
1298 | max_process_desc = inchannel; | |
1299 | ||
d0d6b7c5 JB |
1300 | /* Until we store the proper pid, enable sigchld_handler |
1301 | to recognize an unknown pid as standing for this process. | |
1302 | It is very important not to let this `marker' value stay | |
1303 | in the table after this function has returned; if it does | |
1304 | it might cause call-process to hang and subsequent asynchronous | |
1305 | processes to get their return values scrambled. */ | |
1306 | XSETINT (XPROCESS (process)->pid, -1); | |
1307 | ||
1308 | { | |
1309 | /* child_setup must clobber environ on systems with true vfork. | |
1310 | Protect it from permanent change. */ | |
1311 | char **save_environ = environ; | |
1312 | ||
e98d950b | 1313 | #ifndef WINDOWSNT |
d0d6b7c5 JB |
1314 | pid = vfork (); |
1315 | if (pid == 0) | |
e98d950b | 1316 | #endif /* not WINDOWSNT */ |
d0d6b7c5 JB |
1317 | { |
1318 | int xforkin = forkin; | |
1319 | int xforkout = forkout; | |
1320 | ||
1321 | #if 0 /* This was probably a mistake--it duplicates code later on, | |
1322 | but fails to handle all the cases. */ | |
1323 | /* Make sure SIGCHLD is not blocked in the child. */ | |
1324 | sigsetmask (SIGEMPTYMASK); | |
1325 | #endif | |
1326 | ||
1327 | /* Make the pty be the controlling terminal of the process. */ | |
1328 | #ifdef HAVE_PTYS | |
1329 | /* First, disconnect its current controlling terminal. */ | |
1330 | #ifdef HAVE_SETSID | |
7ce48618 RS |
1331 | /* We tried doing setsid only if pty_flag, but it caused |
1332 | process_set_signal to fail on SGI when using a pipe. */ | |
1333 | setsid (); | |
ce4c9c90 | 1334 | /* Make the pty's terminal the controlling terminal. */ |
084fd64a | 1335 | if (pty_flag) |
39e9ebcd | 1336 | { |
39e9ebcd RS |
1337 | #ifdef TIOCSCTTY |
1338 | /* We ignore the return value | |
1339 | because faith@cs.unc.edu says that is necessary on Linux. */ | |
1340 | ioctl (xforkin, TIOCSCTTY, 0); | |
ce4c9c90 | 1341 | #endif |
39e9ebcd | 1342 | } |
d0d6b7c5 | 1343 | #else /* not HAVE_SETSID */ |
c14e53a4 | 1344 | #ifdef USG |
000ab717 | 1345 | /* It's very important to call setpgrp here and no time |
d0d6b7c5 JB |
1346 | afterwards. Otherwise, we lose our controlling tty which |
1347 | is set when we open the pty. */ | |
1348 | setpgrp (); | |
1349 | #endif /* USG */ | |
1350 | #endif /* not HAVE_SETSID */ | |
9bcf8ec6 KH |
1351 | #if defined (HAVE_TERMIOS) && defined (LDISC1) |
1352 | if (pty_flag && xforkin >= 0) | |
1353 | { | |
1354 | struct termios t; | |
1355 | tcgetattr (xforkin, &t); | |
1356 | t.c_lflag = LDISC1; | |
1357 | if (tcsetattr (xforkin, TCSANOW, &t) < 0) | |
1358 | write (1, "create_process/tcsetattr LDISC1 failed\n", 39); | |
1359 | } | |
1360 | #else | |
aafadd9f | 1361 | #if defined (NTTYDISC) && defined (TIOCSETD) |
ff773a4e | 1362 | if (pty_flag && xforkin >= 0) |
afc549fd RS |
1363 | { |
1364 | /* Use new line discipline. */ | |
1365 | int ldisc = NTTYDISC; | |
4458f555 | 1366 | ioctl (xforkin, TIOCSETD, &ldisc); |
afc549fd | 1367 | } |
000ab717 | 1368 | #endif |
9bcf8ec6 | 1369 | #endif |
d0d6b7c5 JB |
1370 | #ifdef TIOCNOTTY |
1371 | /* In 4.3BSD, the TIOCSPGRP bug has been fixed, and now you | |
1372 | can do TIOCSPGRP only to the process's controlling tty. */ | |
1373 | if (pty_flag) | |
1374 | { | |
1375 | /* I wonder: would just ioctl (0, TIOCNOTTY, 0) work here? | |
1376 | I can't test it since I don't have 4.3. */ | |
1377 | int j = open ("/dev/tty", O_RDWR, 0); | |
1378 | ioctl (j, TIOCNOTTY, 0); | |
1379 | close (j); | |
5a570e37 | 1380 | #ifndef USG |
d0d6b7c5 JB |
1381 | /* In order to get a controlling terminal on some versions |
1382 | of BSD, it is necessary to put the process in pgrp 0 | |
1383 | before it opens the terminal. */ | |
3ea1d291 RS |
1384 | #ifdef OSF1 |
1385 | setpgid (0, 0); | |
1386 | #else | |
d0d6b7c5 | 1387 | setpgrp (0, 0); |
3ea1d291 | 1388 | #endif |
d0d6b7c5 JB |
1389 | #endif |
1390 | } | |
1391 | #endif /* TIOCNOTTY */ | |
1392 | ||
1393 | #if !defined (RTU) && !defined (UNIPLUS) | |
1394 | /*** There is a suggestion that this ought to be a | |
1395 | conditional on TIOCSPGRP. */ | |
1396 | /* Now close the pty (if we had it open) and reopen it. | |
1397 | This makes the pty the controlling terminal of the subprocess. */ | |
1398 | if (pty_flag) | |
1399 | { | |
99e3d726 RS |
1400 | #ifdef SET_CHILD_PTY_PGRP |
1401 | int pgrp = getpid (); | |
1402 | #endif | |
1403 | ||
d0d6b7c5 JB |
1404 | /* I wonder if close (open (pty_name, ...)) would work? */ |
1405 | if (xforkin >= 0) | |
1406 | close (xforkin); | |
1407 | xforkout = xforkin = open (pty_name, O_RDWR, 0); | |
1408 | ||
99e3d726 RS |
1409 | #ifdef SET_CHILD_PTY_PGRP |
1410 | ioctl (xforkin, TIOCSPGRP, &pgrp); | |
1411 | ioctl (xforkout, TIOCSPGRP, &pgrp); | |
1412 | #endif | |
1413 | ||
d0d6b7c5 JB |
1414 | if (xforkin < 0) |
1415 | abort (); | |
1416 | } | |
1417 | #endif /* not UNIPLUS and not RTU */ | |
1418 | #ifdef SETUP_SLAVE_PTY | |
13a72104 RS |
1419 | if (pty_flag) |
1420 | { | |
1421 | SETUP_SLAVE_PTY; | |
1422 | } | |
d0d6b7c5 JB |
1423 | #endif /* SETUP_SLAVE_PTY */ |
1424 | #ifdef AIX | |
1425 | /* On AIX, we've disabled SIGHUP above once we start a child on a pty. | |
1426 | Now reenable it in the child, so it will die when we want it to. */ | |
1427 | if (pty_flag) | |
1428 | signal (SIGHUP, SIG_DFL); | |
1429 | #endif | |
1430 | #endif /* HAVE_PTYS */ | |
1431 | ||
1432 | #ifdef SIGCHLD | |
1433 | #ifdef BSD4_1 | |
1434 | sigrelse (SIGCHLD); | |
1435 | #else /* not BSD4_1 */ | |
1436 | #if defined (BSD) || defined (UNIPLUS) || defined (HPUX) | |
1437 | sigsetmask (SIGEMPTYMASK); | |
1438 | #else /* ordinary USG */ | |
63528b78 | 1439 | #if 0 |
d0d6b7c5 | 1440 | signal (SIGCHLD, sigchld); |
63528b78 | 1441 | #endif |
d0d6b7c5 JB |
1442 | #endif /* ordinary USG */ |
1443 | #endif /* not BSD4_1 */ | |
1444 | #endif /* SIGCHLD */ | |
1445 | ||
5e7e1da2 RS |
1446 | signal (SIGINT, SIG_DFL); |
1447 | signal (SIGQUIT, SIG_DFL); | |
1448 | ||
ab01d0a8 RS |
1449 | if (pty_flag) |
1450 | child_setup_tty (xforkout); | |
e98d950b RS |
1451 | #ifdef WINDOWSNT |
1452 | pid = child_setup (xforkin, xforkout, xforkout, | |
1453 | new_argv, 1, current_dir); | |
1454 | #else /* not WINDOWSNT */ | |
d0d6b7c5 | 1455 | child_setup (xforkin, xforkout, xforkout, |
e065a56e | 1456 | new_argv, 1, current_dir); |
e98d950b | 1457 | #endif /* not WINDOWSNT */ |
d0d6b7c5 JB |
1458 | } |
1459 | environ = save_environ; | |
1460 | } | |
1461 | ||
1462 | if (pid < 0) | |
6311cf58 RS |
1463 | { |
1464 | if (forkin >= 0) | |
1465 | close (forkin); | |
1466 | if (forkin != forkout && forkout >= 0) | |
1467 | close (forkout); | |
1468 | report_file_error ("Doing vfork", Qnil); | |
1469 | } | |
b0310da4 | 1470 | |
22719df2 | 1471 | XSETFASTINT (XPROCESS (process)->pid, pid); |
d0d6b7c5 | 1472 | |
e98d950b RS |
1473 | #ifdef WINDOWSNT |
1474 | register_child (pid, inchannel); | |
1475 | #endif /* WINDOWSNT */ | |
1476 | ||
d0d6b7c5 JB |
1477 | /* If the subfork execv fails, and it exits, |
1478 | this close hangs. I don't know why. | |
1479 | So have an interrupt jar it loose. */ | |
1480 | stop_polling (); | |
1481 | signal (SIGALRM, create_process_1); | |
1482 | alarm (1); | |
99e3d726 RS |
1483 | XPROCESS (process)->subtty = Qnil; |
1484 | if (forkin >= 0) | |
1485 | close (forkin); | |
d0d6b7c5 JB |
1486 | alarm (0); |
1487 | start_polling (); | |
1488 | if (forkin != forkout && forkout >= 0) | |
1489 | close (forkout); | |
1490 | ||
3b9a3dfa RS |
1491 | XPROCESS (process)->tty_name = build_string (pty_name); |
1492 | ||
d0d6b7c5 JB |
1493 | #ifdef SIGCHLD |
1494 | #ifdef BSD4_1 | |
1495 | sigrelse (SIGCHLD); | |
1496 | #else /* not BSD4_1 */ | |
1497 | #if defined (BSD) || defined (UNIPLUS) || defined (HPUX) | |
1498 | sigsetmask (SIGEMPTYMASK); | |
1499 | #else /* ordinary USG */ | |
1500 | #if 0 | |
1501 | signal (SIGCHLD, sigchld); | |
1502 | /* Now really handle any of these signals | |
1503 | that came in during this function. */ | |
1504 | if (sigchld_deferred) | |
1505 | kill (getpid (), SIGCHLD); | |
1506 | #endif | |
1507 | #endif /* ordinary USG */ | |
1508 | #endif /* not BSD4_1 */ | |
1509 | #endif /* SIGCHLD */ | |
1510 | } | |
1511 | #endif /* not VMS */ | |
1512 | ||
1513 | #ifdef HAVE_SOCKETS | |
1514 | ||
1515 | /* open a TCP network connection to a given HOST/SERVICE. Treated | |
1516 | exactly like a normal process when reading and writing. Only | |
1517 | differences are in status display and process deletion. A network | |
1518 | connection has no PID; you cannot signal it. All you can do is | |
1519 | deactivate and close it via delete-process */ | |
1520 | ||
1521 | DEFUN ("open-network-stream", Fopen_network_stream, Sopen_network_stream, | |
1522 | 4, 4, 0, | |
1523 | "Open a TCP connection for a service to a host.\n\ | |
1524 | Returns a subprocess-object to represent the connection.\n\ | |
1525 | Input and output work as for subprocesses; `delete-process' closes it.\n\ | |
1526 | Args are NAME BUFFER HOST SERVICE.\n\ | |
1527 | NAME is name for process. It is modified if necessary to make it unique.\n\ | |
1528 | BUFFER is the buffer (or buffer-name) to associate with the process.\n\ | |
1529 | Process output goes at end of that buffer, unless you specify\n\ | |
1530 | an output stream or filter function to handle the output.\n\ | |
1531 | BUFFER may be also nil, meaning that this process is not associated\n\ | |
1532 | with any buffer\n\ | |
1533 | Third arg is name of the host to connect to, or its IP address.\n\ | |
1534 | Fourth arg SERVICE is name of the service desired, or an integer\n\ | |
1535 | specifying a port number to connect to.") | |
1536 | (name, buffer, host, service) | |
1537 | Lisp_Object name, buffer, host, service; | |
1538 | { | |
1539 | Lisp_Object proc; | |
1540 | register int i; | |
1541 | struct sockaddr_in address; | |
1542 | struct servent *svc_info; | |
1543 | struct hostent *host_info_ptr, host_info; | |
1544 | char *(addr_list[2]); | |
79967d5e | 1545 | IN_ADDR numeric_addr; |
d0d6b7c5 JB |
1546 | int s, outch, inch; |
1547 | char errstring[80]; | |
1548 | int port; | |
1549 | struct hostent host_info_fixed; | |
1550 | struct gcpro gcpro1, gcpro2, gcpro3, gcpro4; | |
e333e864 | 1551 | int retry = 0; |
44ade2e9 | 1552 | int count = specpdl_ptr - specpdl; |
d0d6b7c5 JB |
1553 | |
1554 | GCPRO4 (name, buffer, host, service); | |
1555 | CHECK_STRING (name, 0); | |
1556 | CHECK_STRING (host, 0); | |
bcd69aea | 1557 | if (INTEGERP (service)) |
d0d6b7c5 JB |
1558 | port = htons ((unsigned short) XINT (service)); |
1559 | else | |
1560 | { | |
1561 | CHECK_STRING (service, 0); | |
1562 | svc_info = getservbyname (XSTRING (service)->data, "tcp"); | |
1563 | if (svc_info == 0) | |
1564 | error ("Unknown service \"%s\"", XSTRING (service)->data); | |
1565 | port = svc_info->s_port; | |
1566 | } | |
1567 | ||
1d2c16fa | 1568 | #ifndef TERM |
616da37c RS |
1569 | while (1) |
1570 | { | |
5f0929a7 RS |
1571 | #ifdef TRY_AGAIN |
1572 | h_errno = 0; | |
1573 | #endif | |
616da37c RS |
1574 | host_info_ptr = gethostbyname (XSTRING (host)->data); |
1575 | #ifdef TRY_AGAIN | |
1576 | if (! (host_info_ptr == 0 && h_errno == TRY_AGAIN)) | |
1577 | #endif | |
1578 | break; | |
1579 | Fsleep_for (make_number (1), Qnil); | |
1580 | } | |
d0d6b7c5 JB |
1581 | if (host_info_ptr == 0) |
1582 | /* Attempt to interpret host as numeric inet address */ | |
1583 | { | |
393a9679 | 1584 | numeric_addr = inet_addr ((char *) XSTRING (host)->data); |
79967d5e | 1585 | if (NUMERIC_ADDR_ERROR) |
d0d6b7c5 JB |
1586 | error ("Unknown host \"%s\"", XSTRING (host)->data); |
1587 | ||
1588 | host_info_ptr = &host_info; | |
1589 | host_info.h_name = 0; | |
1590 | host_info.h_aliases = 0; | |
1591 | host_info.h_addrtype = AF_INET; | |
39a21be6 JB |
1592 | #ifdef h_addr |
1593 | /* Older machines have only one address slot called h_addr. | |
1594 | Newer machines have h_addr_list, but #define h_addr to | |
1595 | be its first element. */ | |
1596 | host_info.h_addr_list = &(addr_list[0]); | |
1597 | #endif | |
1598 | host_info.h_addr = (char*)(&numeric_addr); | |
d0d6b7c5 JB |
1599 | addr_list[1] = 0; |
1600 | host_info.h_length = strlen (addr_list[0]); | |
1601 | } | |
1602 | ||
1603 | bzero (&address, sizeof address); | |
1604 | bcopy (host_info_ptr->h_addr, (char *) &address.sin_addr, | |
1605 | host_info_ptr->h_length); | |
1606 | address.sin_family = host_info_ptr->h_addrtype; | |
1607 | address.sin_port = port; | |
1608 | ||
1609 | s = socket (host_info_ptr->h_addrtype, SOCK_STREAM, 0); | |
1610 | if (s < 0) | |
1611 | report_file_error ("error creating socket", Fcons (name, Qnil)); | |
1612 | ||
457a9bee RS |
1613 | /* Kernel bugs (on Ultrix at least) cause lossage (not just EINTR) |
1614 | when connect is interrupted. So let's not let it get interrupted. | |
1615 | Note we do not turn off polling, because polling is only used | |
1616 | when not interrupt_input, and thus not normally used on the systems | |
1617 | which have this bug. On systems which use polling, there's no way | |
1618 | to quit if polling is turned off. */ | |
1619 | if (interrupt_input) | |
1620 | unrequest_sigio (); | |
1621 | ||
44ade2e9 RS |
1622 | /* Slow down polling to every ten seconds. |
1623 | Some kernels have a bug which causes retrying connect to fail | |
1624 | after a connect. */ | |
1625 | #ifdef POLL_FOR_INPUT | |
1626 | bind_polling_period (10); | |
1627 | #endif | |
1628 | ||
d0d6b7c5 | 1629 | loop: |
e333e864 RS |
1630 | if (connect (s, (struct sockaddr *) &address, sizeof address) == -1 |
1631 | && errno != EISCONN) | |
d0d6b7c5 JB |
1632 | { |
1633 | int xerrno = errno; | |
e333e864 | 1634 | |
d0d6b7c5 JB |
1635 | if (errno == EINTR) |
1636 | goto loop; | |
e333e864 RS |
1637 | if (errno == EADDRINUSE && retry < 20) |
1638 | { | |
1639 | retry++; | |
1640 | goto loop; | |
1641 | } | |
1642 | ||
d0d6b7c5 | 1643 | close (s); |
457a9bee RS |
1644 | |
1645 | if (interrupt_input) | |
1646 | request_sigio (); | |
1647 | ||
d0d6b7c5 JB |
1648 | errno = xerrno; |
1649 | report_file_error ("connection failed", | |
1650 | Fcons (host, Fcons (name, Qnil))); | |
1651 | } | |
457a9bee | 1652 | |
44ade2e9 RS |
1653 | #ifdef POLL_FOR_INPUT |
1654 | unbind_to (count, Qnil); | |
1655 | #endif | |
1656 | ||
457a9bee RS |
1657 | if (interrupt_input) |
1658 | request_sigio (); | |
1659 | ||
1d2c16fa RS |
1660 | #else /* TERM */ |
1661 | s = connect_server (0); | |
1662 | if (s < 0) | |
1663 | report_file_error ("error creating socket", Fcons (name, Qnil)); | |
1664 | send_command (s, C_PORT, 0, "%s:%d", XSTRING (host)->data, ntohs (port)); | |
1665 | send_command (s, C_DUMB, 1, 0); | |
1666 | #endif /* TERM */ | |
d0d6b7c5 JB |
1667 | |
1668 | inch = s; | |
1669 | outch = dup (s); | |
1670 | if (outch < 0) | |
1671 | report_file_error ("error duplicating socket", Fcons (name, Qnil)); | |
1672 | ||
1673 | if (!NILP (buffer)) | |
1674 | buffer = Fget_buffer_create (buffer); | |
1675 | proc = make_process (name); | |
1676 | ||
1677 | chan_process[inch] = proc; | |
1678 | ||
1679 | #ifdef O_NONBLOCK | |
1680 | fcntl (inch, F_SETFL, O_NONBLOCK); | |
1681 | #else | |
1682 | #ifdef O_NDELAY | |
1683 | fcntl (inch, F_SETFL, O_NDELAY); | |
1684 | #endif | |
1685 | #endif | |
1686 | ||
1687 | XPROCESS (proc)->childp = host; | |
1688 | XPROCESS (proc)->command_channel_p = Qnil; | |
1689 | XPROCESS (proc)->buffer = buffer; | |
1690 | XPROCESS (proc)->sentinel = Qnil; | |
1691 | XPROCESS (proc)->filter = Qnil; | |
1692 | XPROCESS (proc)->command = Qnil; | |
1693 | XPROCESS (proc)->pid = Qnil; | |
1d056e64 KH |
1694 | XSETINT (XPROCESS (proc)->infd, s); |
1695 | XSETINT (XPROCESS (proc)->outfd, outch); | |
d0d6b7c5 JB |
1696 | XPROCESS (proc)->status = Qrun; |
1697 | FD_SET (inch, &input_wait_mask); | |
a69281ff | 1698 | FD_SET (inch, &non_keyboard_wait_mask); |
7d0e672e RS |
1699 | if (inch > max_process_desc) |
1700 | max_process_desc = inch; | |
d0d6b7c5 JB |
1701 | |
1702 | UNGCPRO; | |
1703 | return proc; | |
1704 | } | |
1705 | #endif /* HAVE_SOCKETS */ | |
1706 | ||
1707 | deactivate_process (proc) | |
1708 | Lisp_Object proc; | |
1709 | { | |
1710 | register int inchannel, outchannel; | |
1711 | register struct Lisp_Process *p = XPROCESS (proc); | |
1712 | ||
a9f2c884 RS |
1713 | inchannel = XINT (p->infd); |
1714 | outchannel = XINT (p->outfd); | |
d0d6b7c5 | 1715 | |
a9f2c884 | 1716 | if (inchannel >= 0) |
d0d6b7c5 JB |
1717 | { |
1718 | /* Beware SIGCHLD hereabouts. */ | |
1719 | flush_pending_output (inchannel); | |
1720 | #ifdef VMS | |
1721 | { | |
1722 | VMS_PROC_STUFF *get_vms_process_pointer (), *vs; | |
1723 | sys$dassgn (outchannel); | |
c6c6865d | 1724 | vs = get_vms_process_pointer (p->pid); |
d0d6b7c5 JB |
1725 | if (vs) |
1726 | give_back_vms_process_stuff (vs); | |
1727 | } | |
1728 | #else | |
1729 | close (inchannel); | |
a9f2c884 | 1730 | if (outchannel >= 0 && outchannel != inchannel) |
d0d6b7c5 JB |
1731 | close (outchannel); |
1732 | #endif | |
1733 | ||
1d056e64 KH |
1734 | XSETINT (p->infd, -1); |
1735 | XSETINT (p->outfd, -1); | |
d0d6b7c5 JB |
1736 | chan_process[inchannel] = Qnil; |
1737 | FD_CLR (inchannel, &input_wait_mask); | |
a69281ff | 1738 | FD_CLR (inchannel, &non_keyboard_wait_mask); |
7d0e672e RS |
1739 | if (inchannel == max_process_desc) |
1740 | { | |
1741 | int i; | |
1742 | /* We just closed the highest-numbered process input descriptor, | |
1743 | so recompute the highest-numbered one now. */ | |
1744 | max_process_desc = 0; | |
1745 | for (i = 0; i < MAXDESC; i++) | |
1746 | if (!NILP (chan_process[i])) | |
1747 | max_process_desc = i; | |
1748 | } | |
d0d6b7c5 JB |
1749 | } |
1750 | } | |
1751 | ||
1752 | /* Close all descriptors currently in use for communication | |
1753 | with subprocess. This is used in a newly-forked subprocess | |
1754 | to get rid of irrelevant descriptors. */ | |
1755 | ||
1756 | close_process_descs () | |
1757 | { | |
e98d950b | 1758 | #ifndef WINDOWSNT |
d0d6b7c5 JB |
1759 | int i; |
1760 | for (i = 0; i < MAXDESC; i++) | |
1761 | { | |
1762 | Lisp_Object process; | |
1763 | process = chan_process[i]; | |
1764 | if (!NILP (process)) | |
1765 | { | |
a9f2c884 RS |
1766 | int in = XINT (XPROCESS (process)->infd); |
1767 | int out = XINT (XPROCESS (process)->outfd); | |
1768 | if (in >= 0) | |
d0d6b7c5 | 1769 | close (in); |
a9f2c884 | 1770 | if (out >= 0 && in != out) |
d0d6b7c5 JB |
1771 | close (out); |
1772 | } | |
1773 | } | |
e98d950b | 1774 | #endif |
d0d6b7c5 JB |
1775 | } |
1776 | \f | |
1777 | DEFUN ("accept-process-output", Faccept_process_output, Saccept_process_output, | |
1778 | 0, 3, 0, | |
1779 | "Allow any pending output from subprocesses to be read by Emacs.\n\ | |
1780 | It is read into the process' buffers or given to their filter functions.\n\ | |
1781 | Non-nil arg PROCESS means do not return until some output has been received\n\ | |
1782 | from PROCESS.\n\ | |
1783 | Non-nil second arg TIMEOUT and third arg TIMEOUT-MSECS are number of\n\ | |
1784 | seconds and microseconds to wait; return after that much time whether\n\ | |
1785 | or not there is input.\n\ | |
1786 | Return non-nil iff we received any output before the timeout expired.") | |
1787 | (proc, timeout, timeout_msecs) | |
1788 | register Lisp_Object proc, timeout, timeout_msecs; | |
1789 | { | |
1790 | int seconds; | |
1791 | int useconds; | |
1792 | ||
1793 | if (! NILP (timeout_msecs)) | |
1794 | { | |
1795 | CHECK_NUMBER (timeout_msecs, 2); | |
1796 | useconds = XINT (timeout_msecs); | |
bcd69aea | 1797 | if (!INTEGERP (timeout)) |
1d056e64 | 1798 | XSETINT (timeout, 0); |
d0d6b7c5 JB |
1799 | |
1800 | { | |
1801 | int carry = useconds / 1000000; | |
1802 | ||
1803 | XSETINT (timeout, XINT (timeout) + carry); | |
1804 | useconds -= carry * 1000000; | |
1805 | ||
1806 | /* I think this clause is necessary because C doesn't | |
1807 | guarantee a particular rounding direction for negative | |
1808 | integers. */ | |
1809 | if (useconds < 0) | |
1810 | { | |
1811 | XSETINT (timeout, XINT (timeout) - 1); | |
1812 | useconds += 1000000; | |
1813 | } | |
1814 | } | |
1815 | } | |
de946e5a RS |
1816 | else |
1817 | useconds = 0; | |
d0d6b7c5 JB |
1818 | |
1819 | if (! NILP (timeout)) | |
1820 | { | |
1821 | CHECK_NUMBER (timeout, 1); | |
1822 | seconds = XINT (timeout); | |
1823 | if (seconds <= 0) | |
1824 | seconds = -1; | |
1825 | } | |
1826 | else | |
1827 | { | |
1828 | if (NILP (proc)) | |
1829 | seconds = -1; | |
1830 | else | |
1831 | seconds = 0; | |
1832 | } | |
1833 | ||
f76475ad | 1834 | if (NILP (proc)) |
22719df2 | 1835 | XSETFASTINT (proc, 0); |
f76475ad | 1836 | |
d0d6b7c5 | 1837 | return |
f76475ad | 1838 | (wait_reading_process_input (seconds, useconds, proc, 0) |
d0d6b7c5 JB |
1839 | ? Qt : Qnil); |
1840 | } | |
1841 | ||
1842 | /* This variable is different from waiting_for_input in keyboard.c. | |
1843 | It is used to communicate to a lisp process-filter/sentinel (via the | |
1844 | function Fwaiting_for_user_input_p below) whether emacs was waiting | |
1845 | for user-input when that process-filter was called. | |
1846 | waiting_for_input cannot be used as that is by definition 0 when | |
d430ee71 RS |
1847 | lisp code is being evalled. |
1848 | This is also used in record_asynch_buffer_change. | |
1849 | For that purpose, this must be 0 | |
1850 | when not inside wait_reading_process_input. */ | |
d0d6b7c5 JB |
1851 | static int waiting_for_user_input_p; |
1852 | ||
1853 | /* Read and dispose of subprocess output while waiting for timeout to | |
1854 | elapse and/or keyboard input to be available. | |
1855 | ||
de6fd4b9 | 1856 | TIME_LIMIT is: |
d0d6b7c5 JB |
1857 | timeout in seconds, or |
1858 | zero for no limit, or | |
1859 | -1 means gobble data immediately available but don't wait for any. | |
1860 | ||
de6fd4b9 RS |
1861 | MICROSECS is: |
1862 | an additional duration to wait, measured in microseconds. | |
1863 | If this is nonzero and time_limit is 0, then the timeout | |
1864 | consists of MICROSECS only. | |
6e4f3667 | 1865 | |
de6fd4b9 | 1866 | READ_KBD is a lisp value: |
d0d6b7c5 JB |
1867 | 0 to ignore keyboard input, or |
1868 | 1 to return when input is available, or | |
84aa3ace | 1869 | -1 meaning caller will actually read the input, so don't throw to |
d0d6b7c5 | 1870 | the quit handler, or |
e6194ffc | 1871 | a cons cell, meaning wait until its car is non-nil |
de6fd4b9 | 1872 | (and gobble terminal input into the buffer if any arrives), or |
f76475ad JB |
1873 | a process object, meaning wait until something arrives from that |
1874 | process. The return value is true iff we read some input from | |
1875 | that process. | |
d0d6b7c5 | 1876 | |
de6fd4b9 | 1877 | DO_DISPLAY != 0 means redisplay should be done to show subprocess |
d0d6b7c5 JB |
1878 | output that arrives. |
1879 | ||
de6fd4b9 | 1880 | If READ_KBD is a pointer to a struct Lisp_Process, then the |
d0d6b7c5 JB |
1881 | function returns true iff we received input from that process |
1882 | before the timeout elapsed. | |
eb8c3be9 | 1883 | Otherwise, return true iff we received input from any process. */ |
d0d6b7c5 JB |
1884 | |
1885 | wait_reading_process_input (time_limit, microsecs, read_kbd, do_display) | |
f76475ad JB |
1886 | int time_limit, microsecs; |
1887 | Lisp_Object read_kbd; | |
1888 | int do_display; | |
d0d6b7c5 JB |
1889 | { |
1890 | register int channel, nfds, m; | |
1891 | static SELECT_TYPE Available; | |
1892 | int xerrno; | |
1893 | Lisp_Object proc; | |
1894 | EMACS_TIME timeout, end_time, garbage; | |
1895 | SELECT_TYPE Atemp; | |
a9f2c884 | 1896 | int wait_channel = -1; |
d0d6b7c5 JB |
1897 | struct Lisp_Process *wait_proc = 0; |
1898 | int got_some_input = 0; | |
84aa3ace | 1899 | Lisp_Object *wait_for_cell = 0; |
d0d6b7c5 JB |
1900 | |
1901 | FD_ZERO (&Available); | |
1902 | ||
f76475ad JB |
1903 | /* If read_kbd is a process to watch, set wait_proc and wait_channel |
1904 | accordingly. */ | |
bcd69aea | 1905 | if (PROCESSP (read_kbd)) |
d0d6b7c5 | 1906 | { |
f76475ad | 1907 | wait_proc = XPROCESS (read_kbd); |
a9f2c884 | 1908 | wait_channel = XINT (wait_proc->infd); |
22719df2 | 1909 | XSETFASTINT (read_kbd, 0); |
d0d6b7c5 JB |
1910 | } |
1911 | ||
84aa3ace | 1912 | /* If waiting for non-nil in a cell, record where. */ |
bcd69aea | 1913 | if (CONSP (read_kbd)) |
84aa3ace RS |
1914 | { |
1915 | wait_for_cell = &XCONS (read_kbd)->car; | |
22719df2 | 1916 | XSETFASTINT (read_kbd, 0); |
84aa3ace RS |
1917 | } |
1918 | ||
f76475ad | 1919 | waiting_for_user_input_p = XINT (read_kbd); |
d0d6b7c5 JB |
1920 | |
1921 | /* Since we may need to wait several times, | |
1922 | compute the absolute time to return at. */ | |
1923 | if (time_limit || microsecs) | |
1924 | { | |
1925 | EMACS_GET_TIME (end_time); | |
1926 | EMACS_SET_SECS_USECS (timeout, time_limit, microsecs); | |
1927 | EMACS_ADD_TIME (end_time, end_time, timeout); | |
1928 | } | |
1929 | ||
99e3d726 RS |
1930 | /* It would not be safe to call this below, |
1931 | where we call redisplay_preserve_echo_area. */ | |
8b4d685f RS |
1932 | if (do_display && frame_garbaged) |
1933 | prepare_menu_bars (); | |
99e3d726 | 1934 | |
d0d6b7c5 JB |
1935 | while (1) |
1936 | { | |
1937 | /* If calling from keyboard input, do not quit | |
1938 | since we want to return C-g as an input character. | |
1939 | Otherwise, do pending quit if requested. */ | |
f76475ad | 1940 | if (XINT (read_kbd) >= 0) |
d0d6b7c5 JB |
1941 | QUIT; |
1942 | ||
889255b4 RS |
1943 | /* Exit now if the cell we're waiting for became non-nil. */ |
1944 | if (wait_for_cell && ! NILP (*wait_for_cell)) | |
1945 | break; | |
1946 | ||
d0d6b7c5 JB |
1947 | /* Compute time from now till when time limit is up */ |
1948 | /* Exit if already run out */ | |
1949 | if (time_limit == -1) | |
1950 | { | |
1951 | /* -1 specified for timeout means | |
1952 | gobble output available now | |
1953 | but don't wait at all. */ | |
1954 | ||
1955 | EMACS_SET_SECS_USECS (timeout, 0, 0); | |
1956 | } | |
1957 | else if (time_limit || microsecs) | |
1958 | { | |
1959 | EMACS_GET_TIME (timeout); | |
1960 | EMACS_SUB_TIME (timeout, end_time, timeout); | |
1961 | if (EMACS_TIME_NEG_P (timeout)) | |
1962 | break; | |
1963 | } | |
1964 | else | |
1965 | { | |
1966 | EMACS_SET_SECS_USECS (timeout, 100000, 0); | |
1967 | } | |
1968 | ||
90ab1a81 JB |
1969 | /* Cause C-g and alarm signals to take immediate action, |
1970 | and cause input available signals to zero out timeout. | |
1971 | ||
1972 | It is important that we do this before checking for process | |
1973 | activity. If we get a SIGCHLD after the explicit checks for | |
1974 | process activity, timeout is the only way we will know. */ | |
1975 | if (XINT (read_kbd) < 0) | |
1976 | set_waiting_for_input (&timeout); | |
1977 | ||
6be429b1 JB |
1978 | /* If status of something has changed, and no input is |
1979 | available, notify the user of the change right away. After | |
1980 | this explicit check, we'll let the SIGCHLD handler zap | |
1981 | timeout to get our attention. */ | |
1982 | if (update_tick != process_tick && do_display) | |
1983 | { | |
1984 | Atemp = input_wait_mask; | |
1985 | EMACS_SET_SECS_USECS (timeout, 0, 0); | |
1986 | if (select (MAXDESC, &Atemp, 0, 0, &timeout) <= 0) | |
90ab1a81 JB |
1987 | { |
1988 | /* It's okay for us to do this and then continue with | |
a0e4d3f3 | 1989 | the loop, since timeout has already been zeroed out. */ |
90ab1a81 JB |
1990 | clear_waiting_for_input (); |
1991 | status_notify (); | |
1992 | } | |
6be429b1 JB |
1993 | } |
1994 | ||
1995 | /* Don't wait for output from a non-running process. */ | |
1996 | if (wait_proc != 0 && !NILP (wait_proc->raw_status_low)) | |
1997 | update_status (wait_proc); | |
1998 | if (wait_proc != 0 | |
1999 | && ! EQ (wait_proc->status, Qrun)) | |
9aa2a7f4 JB |
2000 | { |
2001 | clear_waiting_for_input (); | |
2002 | break; | |
2003 | } | |
6be429b1 | 2004 | |
d0d6b7c5 JB |
2005 | /* Wait till there is something to do */ |
2006 | ||
5e7e1da2 | 2007 | if (! XINT (read_kbd) && wait_for_cell == 0) |
a69281ff RS |
2008 | Available = non_keyboard_wait_mask; |
2009 | else | |
2010 | Available = input_wait_mask; | |
d0d6b7c5 | 2011 | |
ff11dfa1 | 2012 | /* If frame size has changed or the window is newly mapped, |
ffd56f97 JB |
2013 | redisplay now, before we start to wait. There is a race |
2014 | condition here; if a SIGIO arrives between now and the select | |
016899c0 JB |
2015 | and indicates that a frame is trashed, the select may block |
2016 | displaying a trashed screen. */ | |
5164ee8e | 2017 | if (frame_garbaged && do_display) |
ffd56f97 JB |
2018 | redisplay_preserve_echo_area (); |
2019 | ||
f76475ad | 2020 | if (XINT (read_kbd) && detect_input_pending ()) |
a9f2c884 RS |
2021 | { |
2022 | nfds = 0; | |
2023 | FD_ZERO (&Available); | |
2024 | } | |
d0d6b7c5 | 2025 | else |
d0d6b7c5 | 2026 | nfds = select (MAXDESC, &Available, 0, 0, &timeout); |
6720a7fb | 2027 | |
d0d6b7c5 JB |
2028 | xerrno = errno; |
2029 | ||
2030 | /* Make C-g and alarm signals set flags again */ | |
2031 | clear_waiting_for_input (); | |
2032 | ||
2033 | /* If we woke up due to SIGWINCH, actually change size now. */ | |
2034 | do_pending_window_change (); | |
2035 | ||
ffd56f97 | 2036 | if (time_limit && nfds == 0) /* timeout elapsed */ |
d0d6b7c5 JB |
2037 | break; |
2038 | if (nfds < 0) | |
2039 | { | |
2040 | if (xerrno == EINTR) | |
2041 | FD_ZERO (&Available); | |
b0310da4 JB |
2042 | #ifdef ultrix |
2043 | /* Ultrix select seems to return ENOMEM when it is | |
2044 | interrupted. Treat it just like EINTR. Bleah. Note | |
2045 | that we want to test for the "ultrix" CPP symbol, not | |
2046 | "__ultrix__"; the latter is only defined under GCC, but | |
2047 | not by DEC's bundled CC. -JimB */ | |
8058415c JB |
2048 | else if (xerrno == ENOMEM) |
2049 | FD_ZERO (&Available); | |
2050 | #endif | |
d0d6b7c5 JB |
2051 | #ifdef ALLIANT |
2052 | /* This happens for no known reason on ALLIANT. | |
2053 | I am guessing that this is the right response. -- RMS. */ | |
2054 | else if (xerrno == EFAULT) | |
2055 | FD_ZERO (&Available); | |
2056 | #endif | |
2057 | else if (xerrno == EBADF) | |
2058 | { | |
2059 | #ifdef AIX | |
2060 | /* AIX doesn't handle PTY closure the same way BSD does. On AIX, | |
2061 | the child's closure of the pts gives the parent a SIGHUP, and | |
2062 | the ptc file descriptor is automatically closed, | |
2063 | yielding EBADF here or at select() call above. | |
2064 | So, SIGHUP is ignored (see def of PTY_TTY_NAME_SPRINTF | |
a0e4d3f3 | 2065 | in m/ibmrt-aix.h), and here we just ignore the select error. |
d0d6b7c5 | 2066 | Cleanup occurs c/o status_notify after SIGCLD. */ |
ffd56f97 | 2067 | FD_ZERO (&Available); /* Cannot depend on values returned */ |
d0d6b7c5 JB |
2068 | #else |
2069 | abort (); | |
2070 | #endif | |
2071 | } | |
2072 | else | |
b062d1fe | 2073 | error("select error: %s", strerror (xerrno)); |
d0d6b7c5 | 2074 | } |
26ec91de | 2075 | #if defined(sun) && !defined(USG5_4) |
a69281ff | 2076 | else if (nfds > 0 && keyboard_bit_set (&Available) |
dd2281ae | 2077 | && interrupt_input) |
e0109153 JB |
2078 | /* System sometimes fails to deliver SIGIO. |
2079 | ||
2080 | David J. Mackenzie says that Emacs doesn't compile under | |
2081 | Solaris if this code is enabled, thus the USG5_4 in the CPP | |
2082 | conditional. "I haven't noticed any ill effects so far. | |
2083 | If you find a Solaris expert somewhere, they might know | |
2084 | better." */ | |
d0d6b7c5 JB |
2085 | kill (getpid (), SIGIO); |
2086 | #endif | |
2087 | ||
2088 | /* Check for keyboard input */ | |
2089 | /* If there is any, return immediately | |
2090 | to give it higher priority than subprocesses */ | |
2091 | ||
e6194ffc | 2092 | /* We used to do this if wait_for_cell, |
6cbc22ed | 2093 | but that caused infinite recursion in selection request events. */ |
5e7e1da2 | 2094 | if ((XINT (read_kbd) || wait_for_cell) |
97f3b3d6 | 2095 | && detect_input_pending ()) |
6e103bac RS |
2096 | { |
2097 | swallow_events (); | |
2098 | if (detect_input_pending ()) | |
2099 | break; | |
2100 | } | |
d0d6b7c5 | 2101 | |
84aa3ace RS |
2102 | /* Exit now if the cell we're waiting for became non-nil. */ |
2103 | if (wait_for_cell && ! NILP (*wait_for_cell)) | |
2104 | break; | |
2105 | ||
4746118a | 2106 | #ifdef SIGIO |
d0d6b7c5 JB |
2107 | /* If we think we have keyboard input waiting, but didn't get SIGIO |
2108 | go read it. This can happen with X on BSD after logging out. | |
2109 | In that case, there really is no input and no SIGIO, | |
2110 | but select says there is input. */ | |
2111 | ||
dd2281ae | 2112 | if (XINT (read_kbd) && interrupt_input |
a69281ff | 2113 | && (keyboard_bit_set (&Available))) |
d0d6b7c5 | 2114 | kill (0, SIGIO); |
4746118a | 2115 | #endif |
d0d6b7c5 | 2116 | |
d0d6b7c5 JB |
2117 | if (! wait_proc) |
2118 | got_some_input |= nfds > 0; | |
2119 | ||
32676c08 JB |
2120 | /* If checking input just got us a size-change event from X, |
2121 | obey it now if we should. */ | |
97f3b3d6 | 2122 | if (XINT (read_kbd) || wait_for_cell) |
32676c08 JB |
2123 | do_pending_window_change (); |
2124 | ||
a9f2c884 RS |
2125 | /* Check for data from a process. */ |
2126 | /* Really FIRST_PROC_DESC should be 0 on Unix, | |
2127 | but this is safer in the short run. */ | |
a69281ff | 2128 | for (channel = 0; channel <= max_process_desc; channel++) |
d0d6b7c5 | 2129 | { |
a69281ff RS |
2130 | if (FD_ISSET (channel, &Available) |
2131 | && FD_ISSET (channel, &non_keyboard_wait_mask)) | |
d0d6b7c5 JB |
2132 | { |
2133 | int nread; | |
2134 | ||
2135 | /* If waiting for this channel, arrange to return as | |
2136 | soon as no more input to be processed. No more | |
2137 | waiting. */ | |
2138 | if (wait_channel == channel) | |
2139 | { | |
a9f2c884 | 2140 | wait_channel = -1; |
d0d6b7c5 JB |
2141 | time_limit = -1; |
2142 | got_some_input = 1; | |
2143 | } | |
2144 | proc = chan_process[channel]; | |
2145 | if (NILP (proc)) | |
2146 | continue; | |
2147 | ||
d0d6b7c5 JB |
2148 | /* Read data from the process, starting with our |
2149 | buffered-ahead character if we have one. */ | |
2150 | ||
2151 | nread = read_process_output (proc, channel); | |
2152 | if (nread > 0) | |
2153 | { | |
2154 | /* Since read_process_output can run a filter, | |
2155 | which can call accept-process-output, | |
2156 | don't try to read from any other processes | |
2157 | before doing the select again. */ | |
2158 | FD_ZERO (&Available); | |
2159 | ||
2160 | if (do_display) | |
2161 | redisplay_preserve_echo_area (); | |
2162 | } | |
2163 | #ifdef EWOULDBLOCK | |
2164 | else if (nread == -1 && errno == EWOULDBLOCK) | |
2165 | ; | |
2166 | #else | |
2167 | #ifdef O_NONBLOCK | |
2168 | else if (nread == -1 && errno == EAGAIN) | |
2169 | ; | |
2170 | #else | |
2171 | #ifdef O_NDELAY | |
2172 | else if (nread == -1 && errno == EAGAIN) | |
2173 | ; | |
2174 | /* Note that we cannot distinguish between no input | |
2175 | available now and a closed pipe. | |
2176 | With luck, a closed pipe will be accompanied by | |
2177 | subprocess termination and SIGCHLD. */ | |
2178 | else if (nread == 0 && !NETCONN_P (proc)) | |
2179 | ; | |
ffd56f97 JB |
2180 | #endif /* O_NDELAY */ |
2181 | #endif /* O_NONBLOCK */ | |
2182 | #endif /* EWOULDBLOCK */ | |
d0d6b7c5 JB |
2183 | #ifdef HAVE_PTYS |
2184 | /* On some OSs with ptys, when the process on one end of | |
2185 | a pty exits, the other end gets an error reading with | |
2186 | errno = EIO instead of getting an EOF (0 bytes read). | |
2187 | Therefore, if we get an error reading and errno = | |
2188 | EIO, just continue, because the child process has | |
2189 | exited and should clean itself up soon (e.g. when we | |
2190 | get a SIGCHLD). */ | |
2191 | else if (nread == -1 && errno == EIO) | |
2192 | ; | |
ffd56f97 JB |
2193 | #endif /* HAVE_PTYS */ |
2194 | /* If we can detect process termination, don't consider the process | |
2195 | gone just because its pipe is closed. */ | |
d0d6b7c5 JB |
2196 | #ifdef SIGCHLD |
2197 | else if (nread == 0 && !NETCONN_P (proc)) | |
2198 | ; | |
2199 | #endif | |
2200 | else | |
2201 | { | |
2202 | /* Preserve status of processes already terminated. */ | |
2203 | XSETINT (XPROCESS (proc)->tick, ++process_tick); | |
2204 | deactivate_process (proc); | |
2205 | if (!NILP (XPROCESS (proc)->raw_status_low)) | |
2206 | update_status (XPROCESS (proc)); | |
2207 | if (EQ (XPROCESS (proc)->status, Qrun)) | |
2208 | XPROCESS (proc)->status | |
2209 | = Fcons (Qexit, Fcons (make_number (256), Qnil)); | |
2210 | } | |
2211 | } | |
ffd56f97 JB |
2212 | } /* end for each file descriptor */ |
2213 | } /* end while exit conditions not met */ | |
d0d6b7c5 | 2214 | |
d430ee71 RS |
2215 | waiting_for_user_input_p = 0; |
2216 | ||
ffd56f97 JB |
2217 | /* If calling from keyboard input, do not quit |
2218 | since we want to return C-g as an input character. | |
2219 | Otherwise, do pending quit if requested. */ | |
f76475ad | 2220 | if (XINT (read_kbd) >= 0) |
ffd56f97 JB |
2221 | { |
2222 | /* Prevent input_pending from remaining set if we quit. */ | |
2223 | clear_input_pending (); | |
2224 | QUIT; | |
2225 | } | |
d0d6b7c5 JB |
2226 | |
2227 | return got_some_input; | |
2228 | } | |
2229 | \f | |
3b9a3dfa RS |
2230 | /* Given a list (FUNCTION ARGS...), apply FUNCTION to the ARGS. */ |
2231 | ||
2232 | static Lisp_Object | |
2233 | read_process_output_call (fun_and_args) | |
2234 | Lisp_Object fun_and_args; | |
2235 | { | |
2236 | return apply1 (XCONS (fun_and_args)->car, XCONS (fun_and_args)->cdr); | |
2237 | } | |
2238 | ||
2239 | static Lisp_Object | |
2240 | read_process_output_error_handler (error) | |
2241 | Lisp_Object error; | |
2242 | { | |
2243 | cmd_error_internal (error, "error in process filter: "); | |
2244 | Vinhibit_quit = Qt; | |
2245 | update_echo_area (); | |
2246 | Fsleep_for (make_number (2)); | |
2247 | } | |
2248 | ||
d0d6b7c5 JB |
2249 | /* Read pending output from the process channel, |
2250 | starting with our buffered-ahead character if we have one. | |
2251 | Yield number of characters read. | |
2252 | ||
2253 | This function reads at most 1024 characters. | |
2254 | If you want to read all available subprocess output, | |
2255 | you must call it repeatedly until it returns zero. */ | |
2256 | ||
2257 | read_process_output (proc, channel) | |
2258 | Lisp_Object proc; | |
2259 | register int channel; | |
2260 | { | |
2261 | register int nchars; | |
2262 | #ifdef VMS | |
2263 | char *chars; | |
2264 | #else | |
2265 | char chars[1024]; | |
2266 | #endif | |
2267 | register Lisp_Object outstream; | |
2268 | register struct buffer *old = current_buffer; | |
2269 | register struct Lisp_Process *p = XPROCESS (proc); | |
2270 | register int opoint; | |
2271 | ||
2272 | #ifdef VMS | |
2273 | VMS_PROC_STUFF *vs, *get_vms_process_pointer(); | |
2274 | ||
2275 | vs = get_vms_process_pointer (p->pid); | |
2276 | if (vs) | |
2277 | { | |
2278 | if (!vs->iosb[0]) | |
2279 | return(0); /* Really weird if it does this */ | |
2280 | if (!(vs->iosb[0] & 1)) | |
2281 | return -1; /* I/O error */ | |
2282 | } | |
2283 | else | |
2284 | error ("Could not get VMS process pointer"); | |
2285 | chars = vs->inputBuffer; | |
2286 | nchars = clean_vms_buffer (chars, vs->iosb[1]); | |
2287 | if (nchars <= 0) | |
2288 | { | |
2289 | start_vms_process_read (vs); /* Crank up the next read on the process */ | |
2290 | return 1; /* Nothing worth printing, say we got 1 */ | |
2291 | } | |
2292 | #else /* not VMS */ | |
2293 | ||
2294 | if (proc_buffered_char[channel] < 0) | |
e98d950b RS |
2295 | #ifdef WINDOWSNT |
2296 | nchars = read_child_output (channel, chars, sizeof (chars)); | |
2297 | #else | |
d0d6b7c5 | 2298 | nchars = read (channel, chars, sizeof chars); |
e98d950b | 2299 | #endif |
d0d6b7c5 JB |
2300 | else |
2301 | { | |
2302 | chars[0] = proc_buffered_char[channel]; | |
2303 | proc_buffered_char[channel] = -1; | |
e98d950b RS |
2304 | #ifdef WINDOWSNT |
2305 | nchars = read_child_output (channel, chars + 1, sizeof (chars) - 1); | |
2306 | #else | |
d0d6b7c5 | 2307 | nchars = read (channel, chars + 1, sizeof chars - 1); |
e98d950b | 2308 | #endif |
d0d6b7c5 JB |
2309 | if (nchars < 0) |
2310 | nchars = 1; | |
2311 | else | |
2312 | nchars = nchars + 1; | |
2313 | } | |
2314 | #endif /* not VMS */ | |
2315 | ||
2316 | if (nchars <= 0) return nchars; | |
2317 | ||
2318 | outstream = p->filter; | |
2319 | if (!NILP (outstream)) | |
2320 | { | |
2321 | /* We inhibit quit here instead of just catching it so that | |
2322 | hitting ^G when a filter happens to be running won't screw | |
2323 | it up. */ | |
2324 | int count = specpdl_ptr - specpdl; | |
30c78175 | 2325 | Lisp_Object odeactivate; |
d72534ba | 2326 | Lisp_Object obuffer; |
30c78175 RS |
2327 | |
2328 | odeactivate = Vdeactivate_mark; | |
d72534ba | 2329 | obuffer = Fcurrent_buffer (); |
30c78175 | 2330 | |
d0d6b7c5 | 2331 | specbind (Qinhibit_quit, Qt); |
6545aada | 2332 | specbind (Qlast_nonmenu_event, Qt); |
3b9a3dfa | 2333 | |
7074fde6 | 2334 | running_asynch_code = 1; |
3b9a3dfa RS |
2335 | internal_condition_case_1 (read_process_output_call, |
2336 | Fcons (outstream, | |
2337 | Fcons (proc, | |
7074fde6 FP |
2338 | Fcons (make_string (chars, |
2339 | nchars), | |
3b9a3dfa RS |
2340 | Qnil))), |
2341 | !NILP (Vdebug_on_error) ? Qnil : Qerror, | |
2342 | read_process_output_error_handler); | |
7074fde6 FP |
2343 | running_asynch_code = 0; |
2344 | restore_match_data (); | |
d0d6b7c5 | 2345 | |
592ce97f | 2346 | /* Handling the process output should not deactivate the mark. */ |
30c78175 RS |
2347 | Vdeactivate_mark = odeactivate; |
2348 | ||
d72534ba KH |
2349 | if (! EQ (Fcurrent_buffer (), obuffer)) |
2350 | record_asynch_buffer_change (); | |
2351 | ||
8b4d685f RS |
2352 | if (waiting_for_user_input_p) |
2353 | prepare_menu_bars (); | |
2354 | ||
d0d6b7c5 JB |
2355 | #ifdef VMS |
2356 | start_vms_process_read (vs); | |
2357 | #endif | |
2ea6d561 | 2358 | unbind_to (count, Qnil); |
d0d6b7c5 JB |
2359 | return nchars; |
2360 | } | |
2361 | ||
2362 | /* If no filter, write into buffer if it isn't dead. */ | |
2363 | if (!NILP (p->buffer) && !NILP (XBUFFER (p->buffer)->name)) | |
2364 | { | |
b0310da4 JB |
2365 | Lisp_Object old_read_only; |
2366 | Lisp_Object old_begv, old_zv; | |
30c78175 RS |
2367 | Lisp_Object odeactivate; |
2368 | ||
2369 | odeactivate = Vdeactivate_mark; | |
d0d6b7c5 JB |
2370 | |
2371 | Fset_buffer (p->buffer); | |
2372 | opoint = point; | |
b0310da4 | 2373 | old_read_only = current_buffer->read_only; |
22719df2 KH |
2374 | XSETFASTINT (old_begv, BEGV); |
2375 | XSETFASTINT (old_zv, ZV); | |
b0310da4 JB |
2376 | |
2377 | current_buffer->read_only = Qnil; | |
d0d6b7c5 JB |
2378 | |
2379 | /* Insert new output into buffer | |
2380 | at the current end-of-output marker, | |
2381 | thus preserving logical ordering of input and output. */ | |
2382 | if (XMARKER (p->mark)->buffer) | |
53aad33f | 2383 | SET_PT (clip_to_bounds (BEGV, marker_position (p->mark), ZV)); |
d0d6b7c5 JB |
2384 | else |
2385 | SET_PT (ZV); | |
b0310da4 JB |
2386 | |
2387 | /* If the output marker is outside of the visible region, save | |
2388 | the restriction and widen. */ | |
2389 | if (! (BEGV <= point && point <= ZV)) | |
2390 | Fwiden (); | |
2391 | ||
2392 | /* Make sure opoint floats ahead of any new text, just as point | |
2393 | would. */ | |
d0d6b7c5 JB |
2394 | if (point <= opoint) |
2395 | opoint += nchars; | |
2396 | ||
b0310da4 JB |
2397 | /* Insert after old_begv, but before old_zv. */ |
2398 | if (point < XFASTINT (old_begv)) | |
7c6f34f0 | 2399 | XSETFASTINT (old_begv, XFASTINT (old_begv) + nchars); |
b0310da4 | 2400 | if (point <= XFASTINT (old_zv)) |
7c6f34f0 | 2401 | XSETFASTINT (old_zv, XFASTINT (old_zv) + nchars); |
b0310da4 | 2402 | |
d0d6b7c5 JB |
2403 | /* Insert before markers in case we are inserting where |
2404 | the buffer's mark is, and the user's next command is Meta-y. */ | |
2405 | insert_before_markers (chars, nchars); | |
d0d6b7c5 | 2406 | Fset_marker (p->mark, make_number (point), p->buffer); |
b0310da4 | 2407 | |
d0d6b7c5 JB |
2408 | update_mode_lines++; |
2409 | ||
b0310da4 JB |
2410 | /* If the restriction isn't what it should be, set it. */ |
2411 | if (XFASTINT (old_begv) != BEGV || XFASTINT (old_zv) != ZV) | |
2412 | Fnarrow_to_region (old_begv, old_zv); | |
2413 | ||
592ce97f | 2414 | /* Handling the process output should not deactivate the mark. */ |
30c78175 RS |
2415 | Vdeactivate_mark = odeactivate; |
2416 | ||
b0310da4 | 2417 | current_buffer->read_only = old_read_only; |
d0d6b7c5 JB |
2418 | SET_PT (opoint); |
2419 | set_buffer_internal (old); | |
2420 | } | |
2421 | #ifdef VMS | |
2422 | start_vms_process_read (vs); | |
2423 | #endif | |
2424 | return nchars; | |
2425 | } | |
2426 | ||
2427 | DEFUN ("waiting-for-user-input-p", Fwaiting_for_user_input_p, Swaiting_for_user_input_p, | |
2428 | 0, 0, 0, | |
8b4d685f | 2429 | "Returns non-nil if emacs is waiting for input from the user.\n\ |
d0d6b7c5 JB |
2430 | This is intended for use by asynchronous process output filters and sentinels.") |
2431 | () | |
2432 | { | |
8b4d685f | 2433 | return (waiting_for_user_input_p ? Qt : Qnil); |
d0d6b7c5 JB |
2434 | } |
2435 | \f | |
2436 | /* Sending data to subprocess */ | |
2437 | ||
2438 | jmp_buf send_process_frame; | |
2439 | ||
2440 | SIGTYPE | |
2441 | send_process_trap () | |
2442 | { | |
2443 | #ifdef BSD4_1 | |
2444 | sigrelse (SIGPIPE); | |
2445 | sigrelse (SIGALRM); | |
2446 | #endif /* BSD4_1 */ | |
2447 | longjmp (send_process_frame, 1); | |
2448 | } | |
2449 | ||
4556b700 RS |
2450 | /* Send some data to process PROC. |
2451 | BUF is the beginning of the data; LEN is the number of characters. | |
2452 | OBJECT is the Lisp object that the data comes from. */ | |
2453 | ||
2454 | send_process (proc, buf, len, object) | |
d0d6b7c5 JB |
2455 | Lisp_Object proc; |
2456 | char *buf; | |
2457 | int len; | |
4556b700 | 2458 | Lisp_Object object; |
d0d6b7c5 JB |
2459 | { |
2460 | /* Don't use register vars; longjmp can lose them. */ | |
2461 | int rv; | |
2462 | unsigned char *procname = XSTRING (XPROCESS (proc)->name)->data; | |
2463 | ||
d0d6b7c5 JB |
2464 | #ifdef VMS |
2465 | struct Lisp_Process *p = XPROCESS (proc); | |
2466 | VMS_PROC_STUFF *vs, *get_vms_process_pointer(); | |
2467 | #endif /* VMS */ | |
2468 | ||
2469 | if (! NILP (XPROCESS (proc)->raw_status_low)) | |
2470 | update_status (XPROCESS (proc)); | |
2471 | if (! EQ (XPROCESS (proc)->status, Qrun)) | |
2472 | error ("Process %s not running", procname); | |
2473 | ||
2474 | #ifdef VMS | |
2475 | vs = get_vms_process_pointer (p->pid); | |
2476 | if (vs == 0) | |
2477 | error ("Could not find this process: %x", p->pid); | |
2478 | else if (write_to_vms_process (vs, buf, len)) | |
2479 | ; | |
2480 | #else | |
4556b700 RS |
2481 | |
2482 | if (pty_max_bytes == 0) | |
2483 | { | |
2484 | #if defined (HAVE_FPATHCONF) && defined (_PC_MAX_CANON) | |
2485 | pty_max_bytes = fpathconf (XFASTINT (XPROCESS (proc)->outfd), | |
2486 | _PC_MAX_CANON); | |
2487 | if (pty_max_bytes < 0) | |
2488 | pty_max_bytes = 250; | |
2489 | #else | |
2490 | pty_max_bytes = 250; | |
2491 | #endif | |
2492 | /* Deduct one, to leave space for the eof. */ | |
2493 | pty_max_bytes--; | |
2494 | } | |
2495 | ||
d0d6b7c5 JB |
2496 | if (!setjmp (send_process_frame)) |
2497 | while (len > 0) | |
2498 | { | |
2499 | int this = len; | |
4746118a | 2500 | SIGTYPE (*old_sigpipe)(); |
93b4f699 RS |
2501 | int flush_pty = 0; |
2502 | ||
4556b700 RS |
2503 | /* Decide how much data we can send in one batch. |
2504 | Long lines need to be split into multiple batches. */ | |
2505 | if (!NILP (XPROCESS (proc)->pty_flag)) | |
93b4f699 | 2506 | { |
4556b700 RS |
2507 | /* Starting this at zero is always correct when not the first iteration |
2508 | because the previous iteration ended by sending C-d. | |
2509 | It may not be correct for the first iteration | |
2510 | if a partial line was sent in a separate send_process call. | |
2511 | If that proves worth handling, we need to save linepos | |
2512 | in the process object. */ | |
2513 | int linepos = 0; | |
2514 | char *ptr = buf; | |
2515 | char *end = buf + len; | |
2516 | ||
2517 | /* Scan through this text for a line that is too long. */ | |
2518 | while (ptr != end && linepos < pty_max_bytes) | |
2519 | { | |
2520 | if (*ptr == '\n') | |
2521 | linepos = 0; | |
2522 | else | |
2523 | linepos++; | |
2524 | ptr++; | |
2525 | } | |
2526 | /* If we found one, break the line there | |
2527 | and put in a C-d to force the buffer through. */ | |
2528 | this = ptr - buf; | |
93b4f699 RS |
2529 | } |
2530 | ||
4556b700 RS |
2531 | /* Send this batch, using one or more write calls. */ |
2532 | while (this > 0) | |
d0d6b7c5 | 2533 | { |
4556b700 RS |
2534 | old_sigpipe = (SIGTYPE (*) ()) signal (SIGPIPE, send_process_trap); |
2535 | rv = write (XINT (XPROCESS (proc)->outfd), buf, this); | |
2536 | signal (SIGPIPE, old_sigpipe); | |
2537 | ||
2538 | if (rv < 0) | |
2539 | { | |
2540 | if (0 | |
d0d6b7c5 | 2541 | #ifdef EWOULDBLOCK |
4556b700 | 2542 | || errno == EWOULDBLOCK |
d0d6b7c5 JB |
2543 | #endif |
2544 | #ifdef EAGAIN | |
4556b700 | 2545 | || errno == EAGAIN |
d0d6b7c5 | 2546 | #endif |
4556b700 RS |
2547 | ) |
2548 | /* Buffer is full. Wait, accepting input; | |
2549 | that may allow the program | |
2550 | to finish doing output and read more. */ | |
2551 | { | |
2552 | Lisp_Object zero; | |
2553 | int offset; | |
2554 | ||
2555 | /* Running filters might relocate buffers or strings. | |
2556 | Arrange to relocate BUF. */ | |
2557 | if (BUFFERP (object)) | |
2558 | offset = BUF_PTR_CHAR_POS (XBUFFER (object), | |
2559 | (unsigned char *) buf); | |
2560 | else if (STRINGP (object)) | |
2561 | offset = buf - (char *) XSTRING (object)->data; | |
2562 | ||
22719df2 | 2563 | XSETFASTINT (zero, 0); |
4556b700 RS |
2564 | wait_reading_process_input (1, 0, zero, 0); |
2565 | ||
2566 | if (BUFFERP (object)) | |
2567 | buf = (char *) BUF_CHAR_ADDRESS (XBUFFER (object), offset); | |
2568 | else if (STRINGP (object)) | |
2569 | buf = offset + (char *) XSTRING (object)->data; | |
2570 | ||
2571 | rv = 0; | |
2572 | } | |
2573 | else | |
2574 | /* This is a real error. */ | |
2575 | report_file_error ("writing to process", Fcons (proc, Qnil)); | |
d0d6b7c5 | 2576 | } |
4556b700 RS |
2577 | buf += rv; |
2578 | len -= rv; | |
2579 | this -= rv; | |
d0d6b7c5 | 2580 | } |
f76475ad | 2581 | |
4556b700 RS |
2582 | /* If we sent just part of the string, put in an EOF |
2583 | to force it through, before we send the rest. */ | |
2584 | if (len > 0) | |
2585 | Fprocess_send_eof (proc); | |
d0d6b7c5 JB |
2586 | } |
2587 | #endif | |
2588 | else | |
2589 | { | |
2590 | XPROCESS (proc)->raw_status_low = Qnil; | |
2591 | XPROCESS (proc)->raw_status_high = Qnil; | |
2592 | XPROCESS (proc)->status = Fcons (Qexit, Fcons (make_number (256), Qnil)); | |
2593 | XSETINT (XPROCESS (proc)->tick, ++process_tick); | |
2594 | deactivate_process (proc); | |
2595 | #ifdef VMS | |
2596 | error ("Error writing to process %s; closed it", procname); | |
2597 | #else | |
2598 | error ("SIGPIPE raised on process %s; closed it", procname); | |
2599 | #endif | |
2600 | } | |
2601 | } | |
2602 | ||
2603 | DEFUN ("process-send-region", Fprocess_send_region, Sprocess_send_region, | |
2604 | 3, 3, 0, | |
2605 | "Send current contents of region as input to PROCESS.\n\ | |
ebb9e16f JB |
2606 | PROCESS may be a process, a buffer, the name of a process or buffer, or\n\ |
2607 | nil, indicating the current buffer's process.\n\ | |
d0d6b7c5 JB |
2608 | Called from program, takes three arguments, PROCESS, START and END.\n\ |
2609 | If the region is more than 500 characters long,\n\ | |
2610 | it is sent in several bunches. This may happen even for shorter regions.\n\ | |
2611 | Output from processes can arrive in between bunches.") | |
2612 | (process, start, end) | |
2613 | Lisp_Object process, start, end; | |
2614 | { | |
2615 | Lisp_Object proc; | |
2616 | int start1; | |
2617 | ||
2618 | proc = get_process (process); | |
2619 | validate_region (&start, &end); | |
2620 | ||
2621 | if (XINT (start) < GPT && XINT (end) > GPT) | |
2622 | move_gap (start); | |
2623 | ||
2624 | start1 = XINT (start); | |
4556b700 RS |
2625 | send_process (proc, &FETCH_CHAR (start1), XINT (end) - XINT (start), |
2626 | Fcurrent_buffer ()); | |
d0d6b7c5 JB |
2627 | |
2628 | return Qnil; | |
2629 | } | |
2630 | ||
2631 | DEFUN ("process-send-string", Fprocess_send_string, Sprocess_send_string, | |
2632 | 2, 2, 0, | |
2633 | "Send PROCESS the contents of STRING as input.\n\ | |
ebb9e16f JB |
2634 | PROCESS may be a process, a buffer, the name of a process or buffer, or\n\ |
2635 | nil, indicating the current buffer's process.\n\ | |
d0d6b7c5 JB |
2636 | If STRING is more than 500 characters long,\n\ |
2637 | it is sent in several bunches. This may happen even for shorter strings.\n\ | |
2638 | Output from processes can arrive in between bunches.") | |
2639 | (process, string) | |
2640 | Lisp_Object process, string; | |
2641 | { | |
2642 | Lisp_Object proc; | |
2643 | CHECK_STRING (string, 1); | |
2644 | proc = get_process (process); | |
4556b700 | 2645 | send_process (proc, XSTRING (string)->data, XSTRING (string)->size, string); |
d0d6b7c5 JB |
2646 | return Qnil; |
2647 | } | |
2648 | \f | |
2649 | /* send a signal number SIGNO to PROCESS. | |
2650 | CURRENT_GROUP means send to the process group that currently owns | |
2651 | the terminal being used to communicate with PROCESS. | |
2652 | This is used for various commands in shell mode. | |
2653 | If NOMSG is zero, insert signal-announcements into process's buffers | |
b0310da4 JB |
2654 | right away. |
2655 | ||
2656 | If we can, we try to signal PROCESS by sending control characters | |
e333e864 | 2657 | down the pty. This allows us to signal inferiors who have changed |
b0310da4 | 2658 | their uid, for which killpg would return an EPERM error. */ |
d0d6b7c5 | 2659 | |
f9738840 | 2660 | static void |
d0d6b7c5 JB |
2661 | process_send_signal (process, signo, current_group, nomsg) |
2662 | Lisp_Object process; | |
2663 | int signo; | |
2664 | Lisp_Object current_group; | |
2665 | int nomsg; | |
2666 | { | |
2667 | Lisp_Object proc; | |
2668 | register struct Lisp_Process *p; | |
2669 | int gid; | |
2670 | int no_pgrp = 0; | |
2671 | ||
2672 | proc = get_process (process); | |
2673 | p = XPROCESS (proc); | |
2674 | ||
2675 | if (!EQ (p->childp, Qt)) | |
2676 | error ("Process %s is not a subprocess", | |
2677 | XSTRING (p->name)->data); | |
a9f2c884 | 2678 | if (XINT (p->infd) < 0) |
d0d6b7c5 JB |
2679 | error ("Process %s is not active", |
2680 | XSTRING (p->name)->data); | |
2681 | ||
2682 | if (NILP (p->pty_flag)) | |
2683 | current_group = Qnil; | |
2684 | ||
d0d6b7c5 JB |
2685 | /* If we are using pgrps, get a pgrp number and make it negative. */ |
2686 | if (!NILP (current_group)) | |
2687 | { | |
b0310da4 | 2688 | #ifdef SIGNALS_VIA_CHARACTERS |
d0d6b7c5 JB |
2689 | /* If possible, send signals to the entire pgrp |
2690 | by sending an input character to it. */ | |
b0310da4 | 2691 | |
6be429b1 JB |
2692 | /* TERMIOS is the latest and bestest, and seems most likely to |
2693 | work. If the system has it, use it. */ | |
2694 | #ifdef HAVE_TERMIOS | |
2695 | struct termios t; | |
2696 | ||
2697 | switch (signo) | |
2698 | { | |
2699 | case SIGINT: | |
a9f2c884 | 2700 | tcgetattr (XINT (p->infd), &t); |
4556b700 | 2701 | send_process (proc, &t.c_cc[VINTR], 1, Qnil); |
a87b802f | 2702 | return; |
6be429b1 JB |
2703 | |
2704 | case SIGQUIT: | |
a9f2c884 | 2705 | tcgetattr (XINT (p->infd), &t); |
4556b700 | 2706 | send_process (proc, &t.c_cc[VQUIT], 1, Qnil); |
a87b802f | 2707 | return; |
6be429b1 JB |
2708 | |
2709 | case SIGTSTP: | |
a9f2c884 | 2710 | tcgetattr (XINT (p->infd), &t); |
d0adf46f | 2711 | #if defined (VSWTCH) && !defined (PREFER_VSUSP) |
4556b700 | 2712 | send_process (proc, &t.c_cc[VSWTCH], 1, Qnil); |
6be429b1 | 2713 | #else |
4556b700 | 2714 | send_process (proc, &t.c_cc[VSUSP], 1, Qnil); |
6be429b1 | 2715 | #endif |
a87b802f | 2716 | return; |
6be429b1 JB |
2717 | } |
2718 | ||
2719 | #else /* ! HAVE_TERMIOS */ | |
2720 | ||
b0310da4 JB |
2721 | /* On Berkeley descendants, the following IOCTL's retrieve the |
2722 | current control characters. */ | |
d0d6b7c5 | 2723 | #if defined (TIOCGLTC) && defined (TIOCGETC) |
b0310da4 | 2724 | |
d0d6b7c5 JB |
2725 | struct tchars c; |
2726 | struct ltchars lc; | |
2727 | ||
2728 | switch (signo) | |
2729 | { | |
2730 | case SIGINT: | |
a9f2c884 | 2731 | ioctl (XINT (p->infd), TIOCGETC, &c); |
4556b700 | 2732 | send_process (proc, &c.t_intrc, 1, Qnil); |
f9738840 | 2733 | return; |
d0d6b7c5 | 2734 | case SIGQUIT: |
a9f2c884 | 2735 | ioctl (XINT (p->infd), TIOCGETC, &c); |
4556b700 | 2736 | send_process (proc, &c.t_quitc, 1, Qnil); |
f9738840 | 2737 | return; |
0ad77c54 | 2738 | #ifdef SIGTSTP |
d0d6b7c5 | 2739 | case SIGTSTP: |
a9f2c884 | 2740 | ioctl (XINT (p->infd), TIOCGLTC, &lc); |
4556b700 | 2741 | send_process (proc, &lc.t_suspc, 1, Qnil); |
f9738840 | 2742 | return; |
b0310da4 | 2743 | #endif /* ! defined (SIGTSTP) */ |
d0d6b7c5 | 2744 | } |
b0310da4 JB |
2745 | |
2746 | #else /* ! defined (TIOCGLTC) && defined (TIOCGETC) */ | |
2747 | ||
2748 | /* On SYSV descendants, the TCGETA ioctl retrieves the current control | |
2749 | characters. */ | |
2750 | #ifdef TCGETA | |
d0d6b7c5 JB |
2751 | struct termio t; |
2752 | switch (signo) | |
2753 | { | |
2754 | case SIGINT: | |
a9f2c884 | 2755 | ioctl (XINT (p->infd), TCGETA, &t); |
4556b700 | 2756 | send_process (proc, &t.c_cc[VINTR], 1, Qnil); |
f9738840 | 2757 | return; |
d0d6b7c5 | 2758 | case SIGQUIT: |
a9f2c884 | 2759 | ioctl (XINT (p->infd), TCGETA, &t); |
4556b700 | 2760 | send_process (proc, &t.c_cc[VQUIT], 1, Qnil); |
f9738840 | 2761 | return; |
7d79e3b4 | 2762 | #ifdef SIGTSTP |
d0d6b7c5 | 2763 | case SIGTSTP: |
a9f2c884 | 2764 | ioctl (XINT (p->infd), TCGETA, &t); |
4556b700 | 2765 | send_process (proc, &t.c_cc[VSWTCH], 1, Qnil); |
f9738840 | 2766 | return; |
b0310da4 | 2767 | #endif /* ! defined (SIGTSTP) */ |
d0d6b7c5 | 2768 | } |
b0310da4 JB |
2769 | #else /* ! defined (TCGETA) */ |
2770 | Your configuration files are messed up. | |
2771 | /* If your system configuration files define SIGNALS_VIA_CHARACTERS, | |
2772 | you'd better be using one of the alternatives above! */ | |
2773 | #endif /* ! defined (TCGETA) */ | |
2774 | #endif /* ! defined (TIOCGLTC) && defined (TIOCGETC) */ | |
6be429b1 | 2775 | #endif /* ! defined HAVE_TERMIOS */ |
b0310da4 | 2776 | #endif /* ! defined (SIGNALS_VIA_CHARACTERS) */ |
d0d6b7c5 | 2777 | |
301c3fe4 | 2778 | #ifdef TIOCGPGRP |
d0d6b7c5 JB |
2779 | /* Get the pgrp using the tty itself, if we have that. |
2780 | Otherwise, use the pty to get the pgrp. | |
2781 | On pfa systems, saka@pfu.fujitsu.co.JP writes: | |
b0310da4 JB |
2782 | "TIOCGPGRP symbol defined in sys/ioctl.h at E50. |
2783 | But, TIOCGPGRP does not work on E50 ;-P works fine on E60" | |
d0d6b7c5 JB |
2784 | His patch indicates that if TIOCGPGRP returns an error, then |
2785 | we should just assume that p->pid is also the process group id. */ | |
2786 | { | |
2787 | int err; | |
2788 | ||
2789 | if (!NILP (p->subtty)) | |
2790 | err = ioctl (XFASTINT (p->subtty), TIOCGPGRP, &gid); | |
2791 | else | |
a9f2c884 | 2792 | err = ioctl (XINT (p->infd), TIOCGPGRP, &gid); |
d0d6b7c5 JB |
2793 | |
2794 | #ifdef pfa | |
2795 | if (err == -1) | |
2796 | gid = - XFASTINT (p->pid); | |
301c3fe4 | 2797 | #endif /* ! defined (pfa) */ |
d0d6b7c5 JB |
2798 | } |
2799 | if (gid == -1) | |
2800 | no_pgrp = 1; | |
2801 | else | |
2802 | gid = - gid; | |
b0310da4 | 2803 | #else /* ! defined (TIOCGPGRP ) */ |
301c3fe4 JB |
2804 | /* Can't select pgrps on this system, so we know that |
2805 | the child itself heads the pgrp. */ | |
2806 | gid = - XFASTINT (p->pid); | |
2807 | #endif /* ! defined (TIOCGPGRP ) */ | |
d0d6b7c5 JB |
2808 | } |
2809 | else | |
2810 | gid = - XFASTINT (p->pid); | |
d0d6b7c5 JB |
2811 | |
2812 | switch (signo) | |
2813 | { | |
2814 | #ifdef SIGCONT | |
2815 | case SIGCONT: | |
2816 | p->raw_status_low = Qnil; | |
2817 | p->raw_status_high = Qnil; | |
2818 | p->status = Qrun; | |
2819 | XSETINT (p->tick, ++process_tick); | |
2820 | if (!nomsg) | |
2821 | status_notify (); | |
2822 | break; | |
301c3fe4 | 2823 | #endif /* ! defined (SIGCONT) */ |
d0d6b7c5 JB |
2824 | case SIGINT: |
2825 | #ifdef VMS | |
4556b700 | 2826 | send_process (proc, "\003", 1, Qnil); /* ^C */ |
d0d6b7c5 JB |
2827 | goto whoosh; |
2828 | #endif | |
2829 | case SIGQUIT: | |
2830 | #ifdef VMS | |
4556b700 | 2831 | send_process (proc, "\031", 1, Qnil); /* ^Y */ |
d0d6b7c5 JB |
2832 | goto whoosh; |
2833 | #endif | |
2834 | case SIGKILL: | |
2835 | #ifdef VMS | |
2836 | sys$forcex (&(XFASTINT (p->pid)), 0, 1); | |
2837 | whoosh: | |
2838 | #endif | |
a9f2c884 | 2839 | flush_pending_output (XINT (p->infd)); |
d0d6b7c5 JB |
2840 | break; |
2841 | } | |
2842 | ||
2843 | /* If we don't have process groups, send the signal to the immediate | |
2844 | subprocess. That isn't really right, but it's better than any | |
2845 | obvious alternative. */ | |
2846 | if (no_pgrp) | |
2847 | { | |
2848 | kill (XFASTINT (p->pid), signo); | |
2849 | return; | |
2850 | } | |
2851 | ||
2852 | /* gid may be a pid, or minus a pgrp's number */ | |
2853 | #ifdef TIOCSIGSEND | |
2854 | if (!NILP (current_group)) | |
a9f2c884 | 2855 | ioctl (XINT (p->infd), TIOCSIGSEND, signo); |
d0d6b7c5 JB |
2856 | else |
2857 | { | |
2858 | gid = - XFASTINT (p->pid); | |
2859 | kill (gid, signo); | |
2860 | } | |
301c3fe4 | 2861 | #else /* ! defined (TIOCSIGSEND) */ |
d0d6b7c5 | 2862 | EMACS_KILLPG (-gid, signo); |
301c3fe4 | 2863 | #endif /* ! defined (TIOCSIGSEND) */ |
d0d6b7c5 JB |
2864 | } |
2865 | ||
2866 | DEFUN ("interrupt-process", Finterrupt_process, Sinterrupt_process, 0, 2, 0, | |
2867 | "Interrupt process PROCESS. May be process or name of one.\n\ | |
ebb9e16f | 2868 | PROCESS may be a process, a buffer, or the name of a process or buffer.\n\ |
e333e864 | 2869 | nil or no arg means current buffer's process.\n\ |
d0d6b7c5 JB |
2870 | Second arg CURRENT-GROUP non-nil means send signal to\n\ |
2871 | the current process-group of the process's controlling terminal\n\ | |
2872 | rather than to the process's own process group.\n\ | |
2873 | If the process is a shell, this means interrupt current subjob\n\ | |
2874 | rather than the shell.") | |
2875 | (process, current_group) | |
2876 | Lisp_Object process, current_group; | |
2877 | { | |
2878 | process_send_signal (process, SIGINT, current_group, 0); | |
2879 | return process; | |
2880 | } | |
2881 | ||
2882 | DEFUN ("kill-process", Fkill_process, Skill_process, 0, 2, 0, | |
2883 | "Kill process PROCESS. May be process or name of one.\n\ | |
2884 | See function `interrupt-process' for more details on usage.") | |
2885 | (process, current_group) | |
2886 | Lisp_Object process, current_group; | |
2887 | { | |
2888 | process_send_signal (process, SIGKILL, current_group, 0); | |
2889 | return process; | |
2890 | } | |
2891 | ||
2892 | DEFUN ("quit-process", Fquit_process, Squit_process, 0, 2, 0, | |
2893 | "Send QUIT signal to process PROCESS. May be process or name of one.\n\ | |
2894 | See function `interrupt-process' for more details on usage.") | |
2895 | (process, current_group) | |
2896 | Lisp_Object process, current_group; | |
2897 | { | |
2898 | process_send_signal (process, SIGQUIT, current_group, 0); | |
2899 | return process; | |
2900 | } | |
2901 | ||
2902 | DEFUN ("stop-process", Fstop_process, Sstop_process, 0, 2, 0, | |
2903 | "Stop process PROCESS. May be process or name of one.\n\ | |
2904 | See function `interrupt-process' for more details on usage.") | |
2905 | (process, current_group) | |
2906 | Lisp_Object process, current_group; | |
2907 | { | |
2908 | #ifndef SIGTSTP | |
2909 | error ("no SIGTSTP support"); | |
2910 | #else | |
2911 | process_send_signal (process, SIGTSTP, current_group, 0); | |
2912 | #endif | |
2913 | return process; | |
2914 | } | |
2915 | ||
2916 | DEFUN ("continue-process", Fcontinue_process, Scontinue_process, 0, 2, 0, | |
2917 | "Continue 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 | #ifdef SIGCONT | |
2923 | process_send_signal (process, SIGCONT, current_group, 0); | |
2924 | #else | |
2925 | error ("no SIGCONT support"); | |
2926 | #endif | |
2927 | return process; | |
2928 | } | |
2929 | ||
2930 | DEFUN ("signal-process", Fsignal_process, Ssignal_process, | |
2931 | 2, 2, "nProcess number: \nnSignal code: ", | |
2932 | "Send the process with number PID the signal with code CODE.\n\ | |
2933 | Both PID and CODE are integers.") | |
2934 | (pid, sig) | |
2935 | Lisp_Object pid, sig; | |
2936 | { | |
2937 | CHECK_NUMBER (pid, 0); | |
2938 | CHECK_NUMBER (sig, 1); | |
e98d950b RS |
2939 | #ifdef WINDOWSNT |
2940 | /* Only works for kill-type signals */ | |
2941 | return make_number (win32_kill_process (XINT (pid), XINT (sig))); | |
2942 | #else | |
d0d6b7c5 | 2943 | return make_number (kill (XINT (pid), XINT (sig))); |
e98d950b | 2944 | #endif |
d0d6b7c5 JB |
2945 | } |
2946 | ||
2947 | DEFUN ("process-send-eof", Fprocess_send_eof, Sprocess_send_eof, 0, 1, 0, | |
2948 | "Make PROCESS see end-of-file in its input.\n\ | |
2949 | Eof comes after any text already sent to it.\n\ | |
ebb9e16f | 2950 | PROCESS may be a process, a buffer, the name of a process or buffer, or\n\ |
d33a00f2 RS |
2951 | nil, indicating the current buffer's process.\n\ |
2952 | If PROCESS is a network connection, or is a process communicating\n\ | |
2953 | through a pipe (as opposed to a pty), then you cannot send any more\n\ | |
2954 | text to PROCESS after you call this function.") | |
d0d6b7c5 JB |
2955 | (process) |
2956 | Lisp_Object process; | |
2957 | { | |
2958 | Lisp_Object proc; | |
2959 | ||
2960 | proc = get_process (process); | |
577d03d5 RS |
2961 | |
2962 | /* Make sure the process is really alive. */ | |
2963 | if (! NILP (XPROCESS (proc)->raw_status_low)) | |
2964 | update_status (XPROCESS (proc)); | |
2965 | if (! EQ (XPROCESS (proc)->status, Qrun)) | |
dcf970e6 | 2966 | error ("Process %s not running", XSTRING (XPROCESS (proc)->name)->data); |
577d03d5 | 2967 | |
d0d6b7c5 | 2968 | #ifdef VMS |
4556b700 | 2969 | send_process (proc, "\032", 1, Qnil); /* ^z */ |
d0d6b7c5 JB |
2970 | #else |
2971 | if (!NILP (XPROCESS (proc)->pty_flag)) | |
4556b700 | 2972 | send_process (proc, "\004", 1, Qnil); |
d0d6b7c5 JB |
2973 | else |
2974 | { | |
a9f2c884 | 2975 | close (XINT (XPROCESS (proc)->outfd)); |
1d056e64 | 2976 | XSETINT (XPROCESS (proc)->outfd, open (NULL_DEVICE, O_WRONLY)); |
d0d6b7c5 JB |
2977 | } |
2978 | #endif /* VMS */ | |
d0d6b7c5 JB |
2979 | return process; |
2980 | } | |
2981 | ||
2982 | /* Kill all processes associated with `buffer'. | |
2983 | If `buffer' is nil, kill all processes */ | |
2984 | ||
2985 | kill_buffer_processes (buffer) | |
2986 | Lisp_Object buffer; | |
2987 | { | |
2988 | Lisp_Object tail, proc; | |
2989 | ||
b5b502d6 | 2990 | for (tail = Vprocess_alist; GC_CONSP (tail); tail = XCONS (tail)->cdr) |
d0d6b7c5 JB |
2991 | { |
2992 | proc = XCONS (XCONS (tail)->car)->cdr; | |
b5b502d6 | 2993 | if (GC_PROCESSP (proc) |
d0d6b7c5 JB |
2994 | && (NILP (buffer) || EQ (XPROCESS (proc)->buffer, buffer))) |
2995 | { | |
2996 | if (NETCONN_P (proc)) | |
e1ab4959 | 2997 | Fdelete_process (proc); |
a9f2c884 | 2998 | else if (XINT (XPROCESS (proc)->infd) >= 0) |
d0d6b7c5 JB |
2999 | process_send_signal (proc, SIGHUP, Qnil, 1); |
3000 | } | |
3001 | } | |
3002 | } | |
3003 | \f | |
3004 | /* On receipt of a signal that a child status has changed, | |
3005 | loop asking about children with changed statuses until | |
3006 | the system says there are no more. | |
3007 | All we do is change the status; | |
3008 | we do not run sentinels or print notifications. | |
3009 | That is saved for the next time keyboard input is done, | |
3010 | in order to avoid timing errors. */ | |
3011 | ||
3012 | /** WARNING: this can be called during garbage collection. | |
3013 | Therefore, it must not be fooled by the presence of mark bits in | |
3014 | Lisp objects. */ | |
3015 | ||
3016 | /** USG WARNING: Although it is not obvious from the documentation | |
3017 | in signal(2), on a USG system the SIGCLD handler MUST NOT call | |
3018 | signal() before executing at least one wait(), otherwise the handler | |
3019 | will be called again, resulting in an infinite loop. The relevant | |
3020 | portion of the documentation reads "SIGCLD signals will be queued | |
3021 | and the signal-catching function will be continually reentered until | |
3022 | the queue is empty". Invoking signal() causes the kernel to reexamine | |
3023 | the SIGCLD queue. Fred Fish, UniSoft Systems Inc. */ | |
3024 | ||
3025 | SIGTYPE | |
3026 | sigchld_handler (signo) | |
3027 | int signo; | |
3028 | { | |
3029 | int old_errno = errno; | |
3030 | Lisp_Object proc; | |
3031 | register struct Lisp_Process *p; | |
6be429b1 | 3032 | extern EMACS_TIME *input_available_clear_time; |
d0d6b7c5 JB |
3033 | |
3034 | #ifdef BSD4_1 | |
3035 | extern int sigheld; | |
3036 | sigheld |= sigbit (SIGCHLD); | |
3037 | #endif | |
3038 | ||
3039 | while (1) | |
3040 | { | |
3041 | register int pid; | |
3042 | WAITTYPE w; | |
3043 | Lisp_Object tail; | |
3044 | ||
3045 | #ifdef WNOHANG | |
3046 | #ifndef WUNTRACED | |
3047 | #define WUNTRACED 0 | |
3048 | #endif /* no WUNTRACED */ | |
3049 | /* Keep trying to get a status until we get a definitive result. */ | |
3050 | do | |
3051 | { | |
3052 | errno = 0; | |
3053 | pid = wait3 (&w, WNOHANG | WUNTRACED, 0); | |
3054 | } | |
3055 | while (pid <= 0 && errno == EINTR); | |
3056 | ||
3057 | if (pid <= 0) | |
3058 | { | |
3059 | /* A real failure. We have done all our job, so return. */ | |
3060 | ||
3061 | /* USG systems forget handlers when they are used; | |
3062 | must reestablish each time */ | |
3063 | #ifdef USG | |
3064 | signal (signo, sigchld_handler); /* WARNING - must come after wait3() */ | |
3065 | #endif | |
3066 | #ifdef BSD4_1 | |
3067 | sigheld &= ~sigbit (SIGCHLD); | |
3068 | sigrelse (SIGCHLD); | |
3069 | #endif | |
3070 | errno = old_errno; | |
3071 | return; | |
3072 | } | |
3073 | #else | |
3074 | pid = wait (&w); | |
3075 | #endif /* no WNOHANG */ | |
3076 | ||
3077 | /* Find the process that signaled us, and record its status. */ | |
3078 | ||
3079 | p = 0; | |
3080 | for (tail = Vprocess_alist; XSYMBOL (tail) != XSYMBOL (Qnil); tail = XCONS (tail)->cdr) | |
3081 | { | |
3082 | proc = XCONS (XCONS (tail)->car)->cdr; | |
3083 | p = XPROCESS (proc); | |
3084 | if (EQ (p->childp, Qt) && XFASTINT (p->pid) == pid) | |
3085 | break; | |
3086 | p = 0; | |
3087 | } | |
3088 | ||
3089 | /* Look for an asynchronous process whose pid hasn't been filled | |
3090 | in yet. */ | |
3091 | if (p == 0) | |
3092 | for (tail = Vprocess_alist; XSYMBOL (tail) != XSYMBOL (Qnil); tail = XCONS (tail)->cdr) | |
3093 | { | |
3094 | proc = XCONS (XCONS (tail)->car)->cdr; | |
3095 | p = XPROCESS (proc); | |
bcd69aea | 3096 | if (INTEGERP (p->pid) && XINT (p->pid) == -1) |
d0d6b7c5 JB |
3097 | break; |
3098 | p = 0; | |
3099 | } | |
3100 | ||
3101 | /* Change the status of the process that was found. */ | |
3102 | if (p != 0) | |
3103 | { | |
3104 | union { int i; WAITTYPE wt; } u; | |
e98d950b | 3105 | int clear_desc_flag = 0; |
d0d6b7c5 JB |
3106 | |
3107 | XSETINT (p->tick, ++process_tick); | |
3108 | u.wt = w; | |
22719df2 KH |
3109 | XSETFASTINT (p->raw_status_low, u.i & 0xffff); |
3110 | XSETFASTINT (p->raw_status_high, u.i >> 16); | |
d0d6b7c5 JB |
3111 | |
3112 | /* If process has terminated, stop waiting for its output. */ | |
e98d950b RS |
3113 | if ((WIFSIGNALED (w) || WIFEXITED (w)) |
3114 | && XINT (p->infd) >= 0) | |
3115 | clear_desc_flag = 1; | |
3116 | ||
3117 | /* We use clear_desc_flag to avoid a compiler bug in Microsoft C. */ | |
3118 | if (clear_desc_flag) | |
3119 | { | |
3120 | FD_CLR (XINT (p->infd), &input_wait_mask); | |
3121 | FD_CLR (XINT (p->infd), &non_keyboard_wait_mask); | |
3122 | } | |
6be429b1 JB |
3123 | |
3124 | /* Tell wait_reading_process_input that it needs to wake up and | |
3125 | look around. */ | |
3126 | if (input_available_clear_time) | |
3127 | EMACS_SET_SECS_USECS (*input_available_clear_time, 0, 0); | |
d0d6b7c5 JB |
3128 | } |
3129 | ||
3130 | /* There was no asynchronous process found for that id. Check | |
3131 | if we have a synchronous process. */ | |
3132 | else | |
3133 | { | |
3134 | synch_process_alive = 0; | |
3135 | ||
3136 | /* Report the status of the synchronous process. */ | |
3137 | if (WIFEXITED (w)) | |
3138 | synch_process_retcode = WRETCODE (w); | |
3139 | else if (WIFSIGNALED (w)) | |
b97ad9ea RS |
3140 | { |
3141 | int code = WTERMSIG (w); | |
3142 | char *signame = 0; | |
3143 | ||
3144 | if (code < NSIG) | |
3145 | { | |
b0310da4 | 3146 | #ifndef VMS |
ed0cae05 RS |
3147 | /* Suppress warning if the table has const char *. */ |
3148 | signame = (char *) sys_siglist[code]; | |
b0310da4 | 3149 | #else |
b97ad9ea | 3150 | signame = sys_errlist[code]; |
b0310da4 | 3151 | #endif |
b97ad9ea RS |
3152 | } |
3153 | if (signame == 0) | |
3154 | signame = "unknown"; | |
3155 | ||
3156 | synch_process_death = signame; | |
3157 | } | |
6be429b1 JB |
3158 | |
3159 | /* Tell wait_reading_process_input that it needs to wake up and | |
3160 | look around. */ | |
3161 | if (input_available_clear_time) | |
3162 | EMACS_SET_SECS_USECS (*input_available_clear_time, 0, 0); | |
d0d6b7c5 JB |
3163 | } |
3164 | ||
3165 | /* On some systems, we must return right away. | |
3166 | If any more processes want to signal us, we will | |
3167 | get another signal. | |
3168 | Otherwise (on systems that have WNOHANG), loop around | |
3169 | to use up all the processes that have something to tell us. */ | |
e98d950b | 3170 | #if defined (USG) && ! (defined (HPUX) && defined (WNOHANG)) || defined (WINDOWSNT) |
d0d6b7c5 JB |
3171 | #ifdef USG |
3172 | signal (signo, sigchld_handler); | |
3173 | #endif | |
3174 | errno = old_errno; | |
3175 | return; | |
3176 | #endif /* USG, but not HPUX with WNOHANG */ | |
3177 | } | |
3178 | } | |
3179 | \f | |
3180 | ||
3181 | static Lisp_Object | |
3182 | exec_sentinel_unwind (data) | |
3183 | Lisp_Object data; | |
3184 | { | |
3185 | XPROCESS (XCONS (data)->car)->sentinel = XCONS (data)->cdr; | |
3186 | return Qnil; | |
3187 | } | |
3188 | ||
3b9a3dfa RS |
3189 | static Lisp_Object |
3190 | exec_sentinel_error_handler (error) | |
3191 | Lisp_Object error; | |
3192 | { | |
3193 | cmd_error_internal (error, "error in process sentinel: "); | |
3194 | Vinhibit_quit = Qt; | |
3195 | update_echo_area (); | |
3196 | Fsleep_for (make_number (2)); | |
3197 | } | |
3198 | ||
d0d6b7c5 JB |
3199 | static void |
3200 | exec_sentinel (proc, reason) | |
3201 | Lisp_Object proc, reason; | |
3202 | { | |
8fb3cf64 | 3203 | Lisp_Object sentinel, obuffer, odeactivate; |
d0d6b7c5 JB |
3204 | register struct Lisp_Process *p = XPROCESS (proc); |
3205 | int count = specpdl_ptr - specpdl; | |
3206 | ||
8fb3cf64 KH |
3207 | odeactivate = Vdeactivate_mark; |
3208 | obuffer = Fcurrent_buffer (); | |
d0d6b7c5 JB |
3209 | sentinel = p->sentinel; |
3210 | if (NILP (sentinel)) | |
3211 | return; | |
3212 | ||
3213 | /* Zilch the sentinel while it's running, to avoid recursive invocations; | |
3214 | assure that it gets restored no matter how the sentinel exits. */ | |
3215 | p->sentinel = Qnil; | |
3216 | record_unwind_protect (exec_sentinel_unwind, Fcons (proc, sentinel)); | |
3217 | /* Inhibit quit so that random quits don't screw up a running filter. */ | |
3218 | specbind (Qinhibit_quit, Qt); | |
6545aada | 3219 | specbind (Qlast_nonmenu_event, Qt); |
3b9a3dfa | 3220 | |
7074fde6 | 3221 | running_asynch_code = 1; |
3b9a3dfa RS |
3222 | internal_condition_case_1 (read_process_output_call, |
3223 | Fcons (sentinel, | |
3224 | Fcons (proc, Fcons (reason, Qnil))), | |
3225 | !NILP (Vdebug_on_error) ? Qnil : Qerror, | |
3226 | exec_sentinel_error_handler); | |
7074fde6 FP |
3227 | running_asynch_code = 0; |
3228 | restore_match_data (); | |
8fb3cf64 KH |
3229 | |
3230 | Vdeactivate_mark = odeactivate; | |
3231 | if (! EQ (Fcurrent_buffer (), obuffer)) | |
3232 | record_asynch_buffer_change (); | |
3233 | ||
8b4d685f RS |
3234 | if (waiting_for_user_input_p) |
3235 | prepare_menu_bars (); | |
2ea6d561 | 3236 | unbind_to (count, Qnil); |
d0d6b7c5 JB |
3237 | } |
3238 | ||
3239 | /* Report all recent events of a change in process status | |
3240 | (either run the sentinel or output a message). | |
3241 | This is done while Emacs is waiting for keyboard input. */ | |
3242 | ||
3243 | status_notify () | |
3244 | { | |
3245 | register Lisp_Object proc, buffer; | |
2e4149a8 | 3246 | Lisp_Object tail, msg; |
d0d6b7c5 JB |
3247 | struct gcpro gcpro1, gcpro2; |
3248 | ||
2e4149a8 KH |
3249 | tail = Qnil; |
3250 | msg = Qnil; | |
d0d6b7c5 JB |
3251 | /* We need to gcpro tail; if read_process_output calls a filter |
3252 | which deletes a process and removes the cons to which tail points | |
3253 | from Vprocess_alist, and then causes a GC, tail is an unprotected | |
3254 | reference. */ | |
3255 | GCPRO2 (tail, msg); | |
3256 | ||
3257 | for (tail = Vprocess_alist; !NILP (tail); tail = Fcdr (tail)) | |
3258 | { | |
3259 | Lisp_Object symbol; | |
3260 | register struct Lisp_Process *p; | |
3261 | ||
3262 | proc = Fcdr (Fcar (tail)); | |
3263 | p = XPROCESS (proc); | |
3264 | ||
3265 | if (XINT (p->tick) != XINT (p->update_tick)) | |
3266 | { | |
3267 | XSETINT (p->update_tick, XINT (p->tick)); | |
3268 | ||
3269 | /* If process is still active, read any output that remains. */ | |
a9f2c884 | 3270 | if (XINT (p->infd) >= 0) |
20ddfff7 | 3271 | while (! EQ (p->filter, Qt) |
a9f2c884 | 3272 | && read_process_output (proc, XINT (p->infd)) > 0); |
d0d6b7c5 JB |
3273 | |
3274 | buffer = p->buffer; | |
3275 | ||
3276 | /* Get the text to use for the message. */ | |
3277 | if (!NILP (p->raw_status_low)) | |
3278 | update_status (p); | |
3279 | msg = status_message (p->status); | |
3280 | ||
3281 | /* If process is terminated, deactivate it or delete it. */ | |
3282 | symbol = p->status; | |
bcd69aea | 3283 | if (CONSP (p->status)) |
d0d6b7c5 JB |
3284 | symbol = XCONS (p->status)->car; |
3285 | ||
3286 | if (EQ (symbol, Qsignal) || EQ (symbol, Qexit) | |
3287 | || EQ (symbol, Qclosed)) | |
3288 | { | |
3289 | if (delete_exited_processes) | |
3290 | remove_process (proc); | |
3291 | else | |
3292 | deactivate_process (proc); | |
3293 | } | |
3294 | ||
3295 | /* Now output the message suitably. */ | |
3296 | if (!NILP (p->sentinel)) | |
3297 | exec_sentinel (proc, msg); | |
3298 | /* Don't bother with a message in the buffer | |
3299 | when a process becomes runnable. */ | |
3300 | else if (!EQ (symbol, Qrun) && !NILP (buffer)) | |
3301 | { | |
2e4149a8 | 3302 | Lisp_Object ro, tem; |
d0d6b7c5 JB |
3303 | struct buffer *old = current_buffer; |
3304 | int opoint; | |
3305 | ||
2e4149a8 KH |
3306 | ro = XBUFFER (buffer)->read_only; |
3307 | ||
d0d6b7c5 JB |
3308 | /* Avoid error if buffer is deleted |
3309 | (probably that's why the process is dead, too) */ | |
3310 | if (NILP (XBUFFER (buffer)->name)) | |
3311 | continue; | |
3312 | Fset_buffer (buffer); | |
3313 | opoint = point; | |
3314 | /* Insert new output into buffer | |
3315 | at the current end-of-output marker, | |
3316 | thus preserving logical ordering of input and output. */ | |
3317 | if (XMARKER (p->mark)->buffer) | |
3318 | SET_PT (marker_position (p->mark)); | |
3319 | else | |
3320 | SET_PT (ZV); | |
3321 | if (point <= opoint) | |
3322 | opoint += XSTRING (msg)->size + XSTRING (p->name)->size + 10; | |
3323 | ||
3324 | tem = current_buffer->read_only; | |
3325 | current_buffer->read_only = Qnil; | |
3326 | insert_string ("\nProcess "); | |
3327 | Finsert (1, &p->name); | |
3328 | insert_string (" "); | |
3329 | Finsert (1, &msg); | |
3330 | current_buffer->read_only = tem; | |
3331 | Fset_marker (p->mark, make_number (point), p->buffer); | |
3332 | ||
3333 | SET_PT (opoint); | |
3334 | set_buffer_internal (old); | |
3335 | } | |
3336 | } | |
3337 | } /* end for */ | |
3338 | ||
3339 | update_mode_lines++; /* in case buffers use %s in mode-line-format */ | |
3340 | redisplay_preserve_echo_area (); | |
3341 | ||
3342 | update_tick = process_tick; | |
3343 | ||
3344 | UNGCPRO; | |
3345 | } | |
3346 | \f | |
a69281ff RS |
3347 | /* The first time this is called, assume keyboard input comes from DESC |
3348 | instead of from where we used to expect it. | |
3349 | Subsequent calls mean assume input keyboard can come from DESC | |
3350 | in addition to other places. */ | |
3351 | ||
3352 | static int add_keyboard_wait_descriptor_called_flag; | |
3353 | ||
3354 | void | |
3355 | add_keyboard_wait_descriptor (desc) | |
3356 | int desc; | |
3357 | { | |
3358 | if (! add_keyboard_wait_descriptor_called_flag) | |
3359 | FD_CLR (0, &input_wait_mask); | |
3360 | add_keyboard_wait_descriptor_called_flag = 1; | |
3361 | FD_SET (desc, &input_wait_mask); | |
3362 | if (desc > max_keyboard_desc) | |
3363 | max_keyboard_desc = desc; | |
3364 | } | |
3365 | ||
3366 | /* From now on, do not expect DESC to give keyboard input. */ | |
3367 | ||
3368 | void | |
3369 | delete_keyboard_wait_descriptor (desc) | |
3370 | int desc; | |
3371 | { | |
3372 | int fd; | |
3373 | int lim = max_keyboard_desc; | |
3374 | ||
3375 | FD_CLR (desc, &input_wait_mask); | |
3376 | ||
3377 | if (desc == max_keyboard_desc) | |
3378 | for (fd = 0; fd < lim; fd++) | |
3379 | if (FD_ISSET (fd, &input_wait_mask) | |
3380 | && !FD_ISSET (fd, &non_keyboard_wait_mask)) | |
3381 | max_keyboard_desc = fd; | |
3382 | } | |
3383 | ||
3384 | /* Return nonzero if *MASK has a bit set | |
3385 | that corresponds to one of the keyboard input descriptors. */ | |
3386 | ||
3387 | int | |
3388 | keyboard_bit_set (mask) | |
3389 | SELECT_TYPE *mask; | |
3390 | { | |
3391 | int fd; | |
3392 | ||
3393 | for (fd = 0; fd < max_keyboard_desc; fd++) | |
3394 | if (FD_ISSET (fd, mask) && FD_ISSET (fd, &input_wait_mask) | |
3395 | && !FD_ISSET (fd, &non_keyboard_wait_mask)) | |
3396 | return 1; | |
3397 | ||
3398 | return 0; | |
3399 | } | |
3400 | \f | |
d0d6b7c5 JB |
3401 | init_process () |
3402 | { | |
3403 | register int i; | |
3404 | ||
3405 | #ifdef SIGCHLD | |
3406 | #ifndef CANNOT_DUMP | |
3407 | if (! noninteractive || initialized) | |
3408 | #endif | |
3409 | signal (SIGCHLD, sigchld_handler); | |
3410 | #endif | |
3411 | ||
3412 | FD_ZERO (&input_wait_mask); | |
a69281ff | 3413 | FD_ZERO (&non_keyboard_wait_mask); |
7d0e672e | 3414 | max_process_desc = 0; |
dd2281ae | 3415 | |
a69281ff | 3416 | FD_SET (0, &input_wait_mask); |
dd2281ae | 3417 | |
d0d6b7c5 JB |
3418 | Vprocess_alist = Qnil; |
3419 | for (i = 0; i < MAXDESC; i++) | |
3420 | { | |
3421 | chan_process[i] = Qnil; | |
3422 | proc_buffered_char[i] = -1; | |
3423 | } | |
3424 | } | |
312c9964 | 3425 | |
d0d6b7c5 JB |
3426 | syms_of_process () |
3427 | { | |
d0d6b7c5 JB |
3428 | #ifdef HAVE_SOCKETS |
3429 | stream_process = intern ("stream"); | |
3430 | #endif | |
3431 | Qprocessp = intern ("processp"); | |
3432 | staticpro (&Qprocessp); | |
3433 | Qrun = intern ("run"); | |
3434 | staticpro (&Qrun); | |
3435 | Qstop = intern ("stop"); | |
3436 | staticpro (&Qstop); | |
3437 | Qsignal = intern ("signal"); | |
3438 | staticpro (&Qsignal); | |
3439 | ||
3440 | /* Qexit is already staticpro'd by syms_of_eval; don't staticpro it | |
3441 | here again. | |
3442 | ||
3443 | Qexit = intern ("exit"); | |
3444 | staticpro (&Qexit); */ | |
3445 | ||
3446 | Qopen = intern ("open"); | |
3447 | staticpro (&Qopen); | |
3448 | Qclosed = intern ("closed"); | |
3449 | staticpro (&Qclosed); | |
3450 | ||
6545aada RS |
3451 | Qlast_nonmenu_event = intern ("last-nonmenu-event"); |
3452 | staticpro (&Qlast_nonmenu_event); | |
3453 | ||
d0d6b7c5 JB |
3454 | staticpro (&Vprocess_alist); |
3455 | ||
3456 | DEFVAR_BOOL ("delete-exited-processes", &delete_exited_processes, | |
3457 | "*Non-nil means delete processes immediately when they exit.\n\ | |
3458 | nil means don't delete them until `list-processes' is run."); | |
3459 | ||
3460 | delete_exited_processes = 1; | |
3461 | ||
3462 | DEFVAR_LISP ("process-connection-type", &Vprocess_connection_type, | |
3463 | "Control type of device used to communicate with subprocesses.\n\ | |
e333e864 RS |
3464 | Values are nil to use a pipe, or t or `pty' to use a pty.\n\ |
3465 | The value has no effect if the system has no ptys or if all ptys are busy:\n\ | |
3466 | then a pipe is used in any case.\n\ | |
3467 | The value takes effect when `start-process' is called."); | |
d0d6b7c5 JB |
3468 | Vprocess_connection_type = Qt; |
3469 | ||
3470 | defsubr (&Sprocessp); | |
3471 | defsubr (&Sget_process); | |
3472 | defsubr (&Sget_buffer_process); | |
3473 | defsubr (&Sdelete_process); | |
3474 | defsubr (&Sprocess_status); | |
3475 | defsubr (&Sprocess_exit_status); | |
3476 | defsubr (&Sprocess_id); | |
3477 | defsubr (&Sprocess_name); | |
3b9a3dfa | 3478 | defsubr (&Sprocess_tty_name); |
d0d6b7c5 JB |
3479 | defsubr (&Sprocess_command); |
3480 | defsubr (&Sset_process_buffer); | |
3481 | defsubr (&Sprocess_buffer); | |
3482 | defsubr (&Sprocess_mark); | |
3483 | defsubr (&Sset_process_filter); | |
3484 | defsubr (&Sprocess_filter); | |
3485 | defsubr (&Sset_process_sentinel); | |
396df322 | 3486 | defsubr (&Sset_process_window_size); |
d0d6b7c5 JB |
3487 | defsubr (&Sprocess_sentinel); |
3488 | defsubr (&Sprocess_kill_without_query); | |
3489 | defsubr (&Slist_processes); | |
3490 | defsubr (&Sprocess_list); | |
3491 | defsubr (&Sstart_process); | |
3492 | #ifdef HAVE_SOCKETS | |
3493 | defsubr (&Sopen_network_stream); | |
3494 | #endif /* HAVE_SOCKETS */ | |
3495 | defsubr (&Saccept_process_output); | |
3496 | defsubr (&Sprocess_send_region); | |
3497 | defsubr (&Sprocess_send_string); | |
3498 | defsubr (&Sinterrupt_process); | |
3499 | defsubr (&Skill_process); | |
3500 | defsubr (&Squit_process); | |
3501 | defsubr (&Sstop_process); | |
3502 | defsubr (&Scontinue_process); | |
3503 | defsubr (&Sprocess_send_eof); | |
3504 | defsubr (&Ssignal_process); | |
3505 | defsubr (&Swaiting_for_user_input_p); | |
3506 | /* defsubr (&Sprocess_connection); */ | |
3507 | } | |
3508 | ||
6720a7fb JB |
3509 | \f |
3510 | #else /* not subprocesses */ | |
3511 | ||
3512 | #include <sys/types.h> | |
3513 | #include <errno.h> | |
3514 | ||
3515 | #include "lisp.h" | |
3516 | #include "systime.h" | |
3517 | #include "termopts.h" | |
3518 | ||
ff11dfa1 | 3519 | extern int frame_garbaged; |
6720a7fb JB |
3520 | |
3521 | ||
3522 | /* As described above, except assuming that there are no subprocesses: | |
3523 | ||
3524 | Wait for timeout to elapse and/or keyboard input to be available. | |
3525 | ||
3526 | time_limit is: | |
3527 | timeout in seconds, or | |
3528 | zero for no limit, or | |
3529 | -1 means gobble data immediately available but don't wait for any. | |
3530 | ||
f76475ad | 3531 | read_kbd is a Lisp_Object: |
6720a7fb JB |
3532 | 0 to ignore keyboard input, or |
3533 | 1 to return when input is available, or | |
3534 | -1 means caller will actually read the input, so don't throw to | |
3535 | the quit handler. | |
3536 | We know that read_kbd will never be a Lisp_Process, since | |
3537 | `subprocesses' isn't defined. | |
3538 | ||
3539 | do_display != 0 means redisplay should be done to show subprocess | |
5164ee8e | 3540 | output that arrives. |
6720a7fb | 3541 | |
eb8c3be9 | 3542 | Return true iff we received input from any process. */ |
6720a7fb JB |
3543 | |
3544 | int | |
3545 | wait_reading_process_input (time_limit, microsecs, read_kbd, do_display) | |
f76475ad JB |
3546 | int time_limit, microsecs; |
3547 | Lisp_Object read_kbd; | |
3548 | int do_display; | |
6720a7fb JB |
3549 | { |
3550 | EMACS_TIME end_time, timeout, *timeout_p; | |
3551 | int waitchannels; | |
3552 | ||
3553 | /* What does time_limit really mean? */ | |
3554 | if (time_limit || microsecs) | |
3555 | { | |
3556 | /* It's not infinite. */ | |
3557 | timeout_p = &timeout; | |
3558 | ||
3559 | if (time_limit == -1) | |
3560 | /* In fact, it's zero. */ | |
3561 | EMACS_SET_SECS_USECS (timeout, 0, 0); | |
3562 | else | |
3563 | EMACS_SET_SECS_USECS (timeout, time_limit, microsecs); | |
3564 | ||
3565 | /* How far in the future is that? */ | |
3566 | EMACS_GET_TIME (end_time); | |
3567 | EMACS_ADD_TIME (end_time, end_time, timeout); | |
3568 | } | |
3569 | else | |
3570 | /* It's infinite. */ | |
3571 | timeout_p = 0; | |
3572 | ||
99e3d726 RS |
3573 | /* This must come before stop_polling. */ |
3574 | prepare_menu_bars (); | |
3575 | ||
6720a7fb JB |
3576 | /* Turn off periodic alarms (in case they are in use) |
3577 | because the select emulator uses alarms. */ | |
3578 | stop_polling (); | |
3579 | ||
3580 | for (;;) | |
3581 | { | |
3582 | int nfds; | |
3583 | ||
f76475ad | 3584 | waitchannels = XINT (read_kbd) ? 1 : 0; |
6720a7fb JB |
3585 | |
3586 | /* If calling from keyboard input, do not quit | |
3587 | since we want to return C-g as an input character. | |
3588 | Otherwise, do pending quit if requested. */ | |
f76475ad | 3589 | if (XINT (read_kbd) >= 0) |
6720a7fb JB |
3590 | QUIT; |
3591 | ||
3592 | if (timeout_p) | |
3593 | { | |
3594 | EMACS_GET_TIME (*timeout_p); | |
3595 | EMACS_SUB_TIME (*timeout_p, end_time, *timeout_p); | |
3596 | if (EMACS_TIME_NEG_P (*timeout_p)) | |
3597 | break; | |
3598 | } | |
3599 | ||
3600 | /* Cause C-g and alarm signals to take immediate action, | |
3601 | and cause input available signals to zero out timeout. */ | |
f76475ad | 3602 | if (XINT (read_kbd) < 0) |
6720a7fb JB |
3603 | set_waiting_for_input (&timeout); |
3604 | ||
ff11dfa1 | 3605 | /* If a frame has been newly mapped and needs updating, |
6720a7fb | 3606 | reprocess its display stuff. */ |
5164ee8e | 3607 | if (frame_garbaged && do_display) |
6720a7fb JB |
3608 | redisplay_preserve_echo_area (); |
3609 | ||
f76475ad | 3610 | if (XINT (read_kbd) && detect_input_pending ()) |
6720a7fb JB |
3611 | nfds = 0; |
3612 | else | |
3613 | nfds = select (1, &waitchannels, 0, 0, timeout_p); | |
3614 | ||
3615 | /* Make C-g and alarm signals set flags again */ | |
3616 | clear_waiting_for_input (); | |
3617 | ||
3618 | /* If we woke up due to SIGWINCH, actually change size now. */ | |
3619 | do_pending_window_change (); | |
3620 | ||
3621 | if (nfds == -1) | |
3622 | { | |
3623 | /* If the system call was interrupted, then go around the | |
3624 | loop again. */ | |
3625 | if (errno == EINTR) | |
3626 | waitchannels = 0; | |
3627 | } | |
3628 | #ifdef sun | |
3629 | else if (nfds > 0 && (waitchannels & 1) && interrupt_input) | |
3630 | /* System sometimes fails to deliver SIGIO. */ | |
3631 | kill (getpid (), SIGIO); | |
3632 | #endif | |
7324d660 | 3633 | #ifdef SIGIO |
f76475ad | 3634 | if (XINT (read_kbd) && interrupt_input && (waitchannels & 1)) |
6720a7fb | 3635 | kill (0, SIGIO); |
7324d660 | 3636 | #endif |
6720a7fb JB |
3637 | |
3638 | /* If we have timed out (nfds == 0) or found some input (nfds > 0), | |
3639 | we should exit. */ | |
3640 | if (nfds >= 0) | |
3641 | break; | |
3642 | } | |
3643 | ||
a87b802f JB |
3644 | start_polling (); |
3645 | ||
6720a7fb JB |
3646 | return 0; |
3647 | } | |
3648 | ||
3649 | ||
3650 | DEFUN ("get-buffer-process", Fget_buffer_process, Sget_buffer_process, 1, 1, 0, | |
51ab806a | 3651 | /* Don't confuse make-docfile by having two doc strings for this function. |
312c9964 RS |
3652 | make-docfile does not pay attention to #if, for good reason! */ |
3653 | 0) | |
6720a7fb JB |
3654 | (name) |
3655 | register Lisp_Object name; | |
3656 | { | |
3657 | return Qnil; | |
3658 | } | |
3659 | ||
3660 | /* Kill all processes associated with `buffer'. | |
3661 | If `buffer' is nil, kill all processes. | |
3662 | Since we have no subprocesses, this does nothing. */ | |
3663 | ||
3664 | kill_buffer_processes (buffer) | |
3665 | Lisp_Object buffer; | |
3666 | { | |
3667 | } | |
3668 | ||
3669 | init_process () | |
3670 | { | |
3671 | } | |
3672 | ||
3673 | syms_of_process () | |
3674 | { | |
3675 | defsubr (&Sget_buffer_process); | |
3676 | } | |
3677 | ||
3678 | \f | |
3679 | #endif /* not subprocesses */ |