Commit | Line | Data |
---|---|---|
d0d6b7c5 | 1 | /* Asynchronous subprocess control for GNU Emacs. |
4a2f9c6a | 2 | Copyright (C) 1985, 86, 87, 88, 93, 94, 95, 96, 1998 |
03832893 | 3 | Free Software Foundation, Inc. |
d0d6b7c5 JB |
4 | |
5 | This file is part of GNU Emacs. | |
6 | ||
7 | GNU Emacs is free software; you can redistribute it and/or modify | |
8 | it under the terms of the GNU General Public License as published by | |
1dc77cc3 | 9 | the Free Software Foundation; either version 2, or (at your option) |
d0d6b7c5 JB |
10 | any later version. |
11 | ||
12 | GNU Emacs is distributed in the hope that it will be useful, | |
13 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
15 | GNU General Public License for more details. | |
16 | ||
17 | You should have received a copy of the GNU General Public License | |
18 | along with GNU Emacs; see the file COPYING. If not, write to | |
3b7ad313 EN |
19 | the Free Software Foundation, Inc., 59 Temple Place - Suite 330, |
20 | Boston, MA 02111-1307, USA. */ | |
d0d6b7c5 JB |
21 | |
22 | ||
23 | #include <signal.h> | |
24 | ||
18160b98 | 25 | #include <config.h> |
d0d6b7c5 | 26 | |
6720a7fb JB |
27 | /* This file is split into two parts by the following preprocessor |
28 | conditional. The 'then' clause contains all of the support for | |
29 | asynchronous subprocesses. The 'else' clause contains stub | |
30 | versions of some of the asynchronous subprocess routines that are | |
31 | often called elsewhere in Emacs, so we don't have to #ifdef the | |
32 | sections that call them. */ | |
33 | ||
34 | \f | |
d0d6b7c5 | 35 | #ifdef subprocesses |
d0d6b7c5 JB |
36 | |
37 | #include <stdio.h> | |
38 | #include <errno.h> | |
39 | #include <setjmp.h> | |
40 | #include <sys/types.h> /* some typedefs are used in sys/file.h */ | |
41 | #include <sys/file.h> | |
42 | #include <sys/stat.h> | |
93b4f699 RS |
43 | #ifdef HAVE_UNISTD_H |
44 | #include <unistd.h> | |
45 | #endif | |
d0d6b7c5 | 46 | |
e98d950b RS |
47 | #ifdef WINDOWSNT |
48 | #include <stdlib.h> | |
49 | #include <fcntl.h> | |
50 | #endif /* not WINDOWSNT */ | |
51 | ||
d0d6b7c5 JB |
52 | #ifdef HAVE_SOCKETS /* TCP connection support, if kernel can do it */ |
53 | #include <sys/socket.h> | |
54 | #include <netdb.h> | |
55 | #include <netinet/in.h> | |
56 | #include <arpa/inet.h> | |
f2cfa9a6 RS |
57 | #ifdef NEED_NET_ERRNO_H |
58 | #include <net/errno.h> | |
59 | #endif /* NEED_NET_ERRNO_H */ | |
d0d6b7c5 JB |
60 | #endif /* HAVE_SOCKETS */ |
61 | ||
1d2c16fa RS |
62 | /* TERM is a poor-man's SLIP, used on Linux. */ |
63 | #ifdef TERM | |
64 | #include <client.h> | |
65 | #endif | |
66 | ||
cf32fea0 PR |
67 | /* On some systems, e.g. DGUX, inet_addr returns a 'struct in_addr'. */ |
68 | #ifdef HAVE_BROKEN_INET_ADDR | |
79967d5e RS |
69 | #define IN_ADDR struct in_addr |
70 | #define NUMERIC_ADDR_ERROR (numeric_addr.s_addr == -1) | |
71 | #else | |
72 | #define IN_ADDR unsigned long | |
73 | #define NUMERIC_ADDR_ERROR (numeric_addr == -1) | |
74 | #endif | |
75 | ||
6df54671 | 76 | #if defined(BSD_SYSTEM) || defined(STRIDE) |
d0d6b7c5 | 77 | #include <sys/ioctl.h> |
0ad77c54 | 78 | #if !defined (O_NDELAY) && defined (HAVE_PTYS) && !defined(USG5) |
d0d6b7c5 JB |
79 | #include <fcntl.h> |
80 | #endif /* HAVE_PTYS and no O_NDELAY */ | |
6df54671 | 81 | #endif /* BSD_SYSTEM || STRIDE */ |
d0d6b7c5 | 82 | |
99e3d726 RS |
83 | #ifdef BROKEN_O_NONBLOCK |
84 | #undef O_NONBLOCK | |
85 | #endif /* BROKEN_O_NONBLOCK */ | |
86 | ||
d0d6b7c5 JB |
87 | #ifdef NEED_BSDTTY |
88 | #include <bsdtty.h> | |
89 | #endif | |
90 | ||
d0d6b7c5 JB |
91 | #ifdef IRIS |
92 | #include <sys/sysmacros.h> /* for "minor" */ | |
93 | #endif /* not IRIS */ | |
94 | ||
95 | #include "systime.h" | |
36ebaafa | 96 | #include "systty.h" |
d0d6b7c5 JB |
97 | |
98 | #include "lisp.h" | |
99 | #include "window.h" | |
100 | #include "buffer.h" | |
0fa1789e KH |
101 | #include "charset.h" |
102 | #include "coding.h" | |
d0d6b7c5 JB |
103 | #include "process.h" |
104 | #include "termhooks.h" | |
105 | #include "termopts.h" | |
106 | #include "commands.h" | |
1dc77cc3 | 107 | #include "frame.h" |
ececcbec | 108 | #include "blockinput.h" |
d0d6b7c5 | 109 | |
0c9960e9 RS |
110 | #define max(a, b) ((a) > (b) ? (a) : (b)) |
111 | ||
dd2281ae | 112 | Lisp_Object Qprocessp; |
d0d6b7c5 | 113 | Lisp_Object Qrun, Qstop, Qsignal, Qopen, Qclosed; |
6545aada | 114 | Lisp_Object Qlast_nonmenu_event; |
d0d6b7c5 JB |
115 | /* Qexit is declared and initialized in eval.c. */ |
116 | ||
117 | /* a process object is a network connection when its childp field is neither | |
de282a05 | 118 | Qt nor Qnil but is instead a cons cell (HOSTNAME PORTNUM). */ |
d0d6b7c5 JB |
119 | |
120 | #ifdef HAVE_SOCKETS | |
de282a05 | 121 | #define NETCONN_P(p) (GC_CONSP (XPROCESS (p)->childp)) |
d0d6b7c5 JB |
122 | #else |
123 | #define NETCONN_P(p) 0 | |
124 | #endif /* HAVE_SOCKETS */ | |
125 | ||
126 | /* Define first descriptor number available for subprocesses. */ | |
127 | #ifdef VMS | |
128 | #define FIRST_PROC_DESC 1 | |
129 | #else /* Not VMS */ | |
130 | #define FIRST_PROC_DESC 3 | |
131 | #endif | |
132 | ||
133 | /* Define SIGCHLD as an alias for SIGCLD. There are many conditionals | |
134 | testing SIGCHLD. */ | |
135 | ||
136 | #if !defined (SIGCHLD) && defined (SIGCLD) | |
137 | #define SIGCHLD SIGCLD | |
138 | #endif /* SIGCLD */ | |
139 | ||
140 | #include "syssignal.h" | |
141 | ||
889255b4 | 142 | #include "syswait.h" |
d0d6b7c5 | 143 | |
b062d1fe RM |
144 | extern int errno; |
145 | extern char *strerror (); | |
146 | #ifdef VMS | |
d0d6b7c5 | 147 | extern char *sys_errlist[]; |
b062d1fe | 148 | #endif |
d0d6b7c5 | 149 | |
5f0929a7 RS |
150 | #ifndef HAVE_H_ERRNO |
151 | extern int h_errno; | |
152 | #endif | |
153 | ||
a86928f7 | 154 | #ifndef SYS_SIGLIST_DECLARED |
d0d6b7c5 JB |
155 | #ifndef VMS |
156 | #ifndef BSD4_1 | |
e98d950b | 157 | #ifndef WINDOWSNT |
084fd64a | 158 | #ifndef LINUX |
d0d6b7c5 | 159 | extern char *sys_siglist[]; |
a0e4d3f3 RS |
160 | #endif /* not LINUX */ |
161 | #else /* BSD4_1 */ | |
d0d6b7c5 JB |
162 | char *sys_siglist[] = |
163 | { | |
164 | "bum signal!!", | |
165 | "hangup", | |
166 | "interrupt", | |
167 | "quit", | |
168 | "illegal instruction", | |
169 | "trace trap", | |
170 | "iot instruction", | |
171 | "emt instruction", | |
172 | "floating point exception", | |
173 | "kill", | |
174 | "bus error", | |
175 | "segmentation violation", | |
176 | "bad argument to system call", | |
177 | "write on a pipe with no one to read it", | |
178 | "alarm clock", | |
179 | "software termination signal from kill", | |
180 | "status signal", | |
181 | "sendable stop signal not from tty", | |
182 | "stop signal from tty", | |
183 | "continue a stopped process", | |
184 | "child status has changed", | |
185 | "background read attempted from control tty", | |
186 | "background write attempted from control tty", | |
187 | "input record available at control tty", | |
188 | "exceeded CPU time limit", | |
189 | "exceeded file size limit" | |
190 | }; | |
e98d950b | 191 | #endif /* not WINDOWSNT */ |
d0d6b7c5 JB |
192 | #endif |
193 | #endif /* VMS */ | |
a86928f7 | 194 | #endif /* ! SYS_SIGLIST_DECLARED */ |
d0d6b7c5 | 195 | |
d0d6b7c5 JB |
196 | /* t means use pty, nil means use a pipe, |
197 | maybe other values to come. */ | |
dd2281ae | 198 | static Lisp_Object Vprocess_connection_type; |
d0d6b7c5 JB |
199 | |
200 | #ifdef SKTPAIR | |
201 | #ifndef HAVE_SOCKETS | |
202 | #include <sys/socket.h> | |
203 | #endif | |
204 | #endif /* SKTPAIR */ | |
205 | ||
17d02632 KH |
206 | /* These next two vars are non-static since sysdep.c uses them in the |
207 | emulation of `select'. */ | |
d0d6b7c5 | 208 | /* Number of events of change of status of a process. */ |
17d02632 | 209 | int process_tick; |
d0d6b7c5 | 210 | /* Number of events for which the user or sentinel has been notified. */ |
17d02632 | 211 | int update_tick; |
d0d6b7c5 | 212 | |
5886acf9 | 213 | #include "sysselect.h" |
d0d6b7c5 | 214 | |
583dcae4 | 215 | /* If we support a window system, turn on the code to poll periodically |
44ade2e9 | 216 | to detect C-g. It isn't actually used when doing interrupt input. */ |
583dcae4 | 217 | #ifdef HAVE_WINDOW_SYSTEM |
44ade2e9 RS |
218 | #define POLL_FOR_INPUT |
219 | #endif | |
220 | ||
a69281ff | 221 | /* Mask of bits indicating the descriptors that we wait for input on. */ |
d0d6b7c5 | 222 | |
dd2281ae RS |
223 | static SELECT_TYPE input_wait_mask; |
224 | ||
a69281ff RS |
225 | /* Mask that excludes keyboard input descriptor (s). */ |
226 | ||
227 | static SELECT_TYPE non_keyboard_wait_mask; | |
228 | ||
b5dc1c83 RS |
229 | /* Mask that excludes process input descriptor (s). */ |
230 | ||
231 | static SELECT_TYPE non_process_wait_mask; | |
232 | ||
7d0e672e RS |
233 | /* The largest descriptor currently in use for a process object. */ |
234 | static int max_process_desc; | |
235 | ||
a69281ff RS |
236 | /* The largest descriptor currently in use for keyboard input. */ |
237 | static int max_keyboard_desc; | |
d0d6b7c5 | 238 | |
dd2281ae RS |
239 | /* Nonzero means delete a process right away if it exits. */ |
240 | static int delete_exited_processes; | |
d0d6b7c5 JB |
241 | |
242 | /* Indexed by descriptor, gives the process (if any) for that descriptor */ | |
41f3aa98 | 243 | Lisp_Object chan_process[MAXDESC]; |
d0d6b7c5 JB |
244 | |
245 | /* Alist of elements (NAME . PROCESS) */ | |
41f3aa98 | 246 | Lisp_Object Vprocess_alist; |
d0d6b7c5 JB |
247 | |
248 | /* Buffered-ahead input char from process, indexed by channel. | |
249 | -1 means empty (no char is buffered). | |
250 | Used on sys V where the only way to tell if there is any | |
251 | output from the process is to read at least one char. | |
252 | Always -1 on systems that support FIONREAD. */ | |
253 | ||
e98d950b RS |
254 | /* Don't make static; need to access externally. */ |
255 | int proc_buffered_char[MAXDESC]; | |
dd2281ae | 256 | |
0fa1789e | 257 | /* Table of `struct coding-system' for each process. */ |
c7580538 KH |
258 | static struct coding_system *proc_decode_coding_system[MAXDESC]; |
259 | static struct coding_system *proc_encode_coding_system[MAXDESC]; | |
0fa1789e | 260 | |
dd2281ae | 261 | static Lisp_Object get_process (); |
93b4f699 | 262 | |
fb4c3627 | 263 | extern EMACS_TIME timer_check (); |
5de50bfb | 264 | extern int timers_run; |
fb4c3627 | 265 | |
93b4f699 RS |
266 | /* Maximum number of bytes to send to a pty without an eof. */ |
267 | static int pty_max_bytes; | |
3b9a3dfa | 268 | |
a932f187 RS |
269 | extern Lisp_Object Vfile_name_coding_system; |
270 | ||
875e6b94 KH |
271 | #ifdef HAVE_PTYS |
272 | /* The file name of the pty opened by allocate_pty. */ | |
3b9a3dfa RS |
273 | |
274 | static char pty_name[24]; | |
875e6b94 | 275 | #endif |
d0d6b7c5 JB |
276 | \f |
277 | /* Compute the Lisp form of the process status, p->status, from | |
278 | the numeric status that was returned by `wait'. */ | |
279 | ||
f9738840 JB |
280 | Lisp_Object status_convert (); |
281 | ||
d0d6b7c5 JB |
282 | update_status (p) |
283 | struct Lisp_Process *p; | |
284 | { | |
285 | union { int i; WAITTYPE wt; } u; | |
286 | u.i = XFASTINT (p->raw_status_low) + (XFASTINT (p->raw_status_high) << 16); | |
287 | p->status = status_convert (u.wt); | |
288 | p->raw_status_low = Qnil; | |
289 | p->raw_status_high = Qnil; | |
290 | } | |
291 | ||
91d10fa8 | 292 | /* Convert a process status word in Unix format to |
d0d6b7c5 JB |
293 | the list that we use internally. */ |
294 | ||
295 | Lisp_Object | |
296 | status_convert (w) | |
297 | WAITTYPE w; | |
298 | { | |
299 | if (WIFSTOPPED (w)) | |
300 | return Fcons (Qstop, Fcons (make_number (WSTOPSIG (w)), Qnil)); | |
301 | else if (WIFEXITED (w)) | |
302 | return Fcons (Qexit, Fcons (make_number (WRETCODE (w)), | |
303 | WCOREDUMP (w) ? Qt : Qnil)); | |
304 | else if (WIFSIGNALED (w)) | |
305 | return Fcons (Qsignal, Fcons (make_number (WTERMSIG (w)), | |
306 | WCOREDUMP (w) ? Qt : Qnil)); | |
307 | else | |
308 | return Qrun; | |
309 | } | |
310 | ||
311 | /* Given a status-list, extract the three pieces of information | |
312 | and store them individually through the three pointers. */ | |
313 | ||
314 | void | |
315 | decode_status (l, symbol, code, coredump) | |
316 | Lisp_Object l; | |
317 | Lisp_Object *symbol; | |
318 | int *code; | |
319 | int *coredump; | |
320 | { | |
321 | Lisp_Object tem; | |
322 | ||
bcd69aea | 323 | if (SYMBOLP (l)) |
d0d6b7c5 JB |
324 | { |
325 | *symbol = l; | |
326 | *code = 0; | |
327 | *coredump = 0; | |
328 | } | |
329 | else | |
330 | { | |
331 | *symbol = XCONS (l)->car; | |
332 | tem = XCONS (l)->cdr; | |
333 | *code = XFASTINT (XCONS (tem)->car); | |
f9738840 | 334 | tem = XCONS (tem)->cdr; |
d0d6b7c5 JB |
335 | *coredump = !NILP (tem); |
336 | } | |
337 | } | |
338 | ||
339 | /* Return a string describing a process status list. */ | |
340 | ||
341 | Lisp_Object | |
342 | status_message (status) | |
343 | Lisp_Object status; | |
344 | { | |
345 | Lisp_Object symbol; | |
346 | int code, coredump; | |
347 | Lisp_Object string, string2; | |
348 | ||
349 | decode_status (status, &symbol, &code, &coredump); | |
350 | ||
351 | if (EQ (symbol, Qsignal) || EQ (symbol, Qstop)) | |
352 | { | |
b97ad9ea RS |
353 | char *signame = 0; |
354 | if (code < NSIG) | |
355 | { | |
b0310da4 | 356 | #ifndef VMS |
ed0cae05 RS |
357 | /* Cast to suppress warning if the table has const char *. */ |
358 | signame = (char *) sys_siglist[code]; | |
b0310da4 | 359 | #else |
b97ad9ea | 360 | signame = sys_errlist[code]; |
b0310da4 | 361 | #endif |
b97ad9ea RS |
362 | } |
363 | if (signame == 0) | |
364 | signame = "unknown"; | |
365 | string = build_string (signame); | |
d0d6b7c5 JB |
366 | string2 = build_string (coredump ? " (core dumped)\n" : "\n"); |
367 | XSTRING (string)->data[0] = DOWNCASE (XSTRING (string)->data[0]); | |
368 | return concat2 (string, string2); | |
369 | } | |
370 | else if (EQ (symbol, Qexit)) | |
371 | { | |
372 | if (code == 0) | |
373 | return build_string ("finished\n"); | |
f2980264 | 374 | string = Fnumber_to_string (make_number (code)); |
d0d6b7c5 JB |
375 | string2 = build_string (coredump ? " (core dumped)\n" : "\n"); |
376 | return concat2 (build_string ("exited abnormally with code "), | |
377 | concat2 (string, string2)); | |
378 | } | |
379 | else | |
380 | return Fcopy_sequence (Fsymbol_name (symbol)); | |
381 | } | |
382 | \f | |
383 | #ifdef HAVE_PTYS | |
d0d6b7c5 | 384 | |
875e6b94 KH |
385 | /* Open an available pty, returning a file descriptor. |
386 | Return -1 on failure. | |
387 | The file name of the terminal corresponding to the pty | |
388 | is left in the variable pty_name. */ | |
389 | ||
d0d6b7c5 JB |
390 | int |
391 | allocate_pty () | |
392 | { | |
393 | struct stat stb; | |
394 | register c, i; | |
395 | int fd; | |
396 | ||
32676c08 JB |
397 | /* Some systems name their pseudoterminals so that there are gaps in |
398 | the usual sequence - for example, on HP9000/S700 systems, there | |
399 | are no pseudoterminals with names ending in 'f'. So we wait for | |
400 | three failures in a row before deciding that we've reached the | |
401 | end of the ptys. */ | |
402 | int failed_count = 0; | |
403 | ||
d0d6b7c5 JB |
404 | #ifdef PTY_ITERATION |
405 | PTY_ITERATION | |
406 | #else | |
407 | for (c = FIRST_PTY_LETTER; c <= 'z'; c++) | |
408 | for (i = 0; i < 16; i++) | |
409 | #endif | |
410 | { | |
411 | #ifdef PTY_NAME_SPRINTF | |
412 | PTY_NAME_SPRINTF | |
d0d6b7c5 JB |
413 | #else |
414 | sprintf (pty_name, "/dev/pty%c%x", c, i); | |
d0d6b7c5 JB |
415 | #endif /* no PTY_NAME_SPRINTF */ |
416 | ||
4d7c105e RS |
417 | #ifdef PTY_OPEN |
418 | PTY_OPEN; | |
419 | #else /* no PTY_OPEN */ | |
32676c08 JB |
420 | #ifdef IRIS |
421 | /* Unusual IRIS code */ | |
422 | *ptyv = open ("/dev/ptc", O_RDWR | O_NDELAY, 0); | |
423 | if (fd < 0) | |
424 | return -1; | |
425 | if (fstat (fd, &stb) < 0) | |
d0d6b7c5 | 426 | return -1; |
4d7c105e | 427 | #else /* not IRIS */ |
32676c08 JB |
428 | if (stat (pty_name, &stb) < 0) |
429 | { | |
430 | failed_count++; | |
431 | if (failed_count >= 3) | |
432 | return -1; | |
433 | } | |
434 | else | |
435 | failed_count = 0; | |
d0d6b7c5 JB |
436 | #ifdef O_NONBLOCK |
437 | fd = open (pty_name, O_RDWR | O_NONBLOCK, 0); | |
438 | #else | |
439 | fd = open (pty_name, O_RDWR | O_NDELAY, 0); | |
440 | #endif | |
4d7c105e RS |
441 | #endif /* not IRIS */ |
442 | #endif /* no PTY_OPEN */ | |
d0d6b7c5 JB |
443 | |
444 | if (fd >= 0) | |
445 | { | |
446 | /* check to make certain that both sides are available | |
447 | this avoids a nasty yet stupid bug in rlogins */ | |
448 | #ifdef PTY_TTY_NAME_SPRINTF | |
449 | PTY_TTY_NAME_SPRINTF | |
d0d6b7c5 JB |
450 | #else |
451 | sprintf (pty_name, "/dev/tty%c%x", c, i); | |
d0d6b7c5 JB |
452 | #endif /* no PTY_TTY_NAME_SPRINTF */ |
453 | #ifndef UNIPLUS | |
454 | if (access (pty_name, 6) != 0) | |
455 | { | |
456 | close (fd); | |
fad97cbe | 457 | #if !defined(IRIS) && !defined(__sgi) |
d0d6b7c5 JB |
458 | continue; |
459 | #else | |
460 | return -1; | |
461 | #endif /* IRIS */ | |
462 | } | |
463 | #endif /* not UNIPLUS */ | |
464 | setup_pty (fd); | |
465 | return fd; | |
466 | } | |
467 | } | |
468 | return -1; | |
469 | } | |
470 | #endif /* HAVE_PTYS */ | |
471 | \f | |
472 | Lisp_Object | |
473 | make_process (name) | |
474 | Lisp_Object name; | |
475 | { | |
23d6bb9c | 476 | struct Lisp_Vector *vec; |
d0d6b7c5 JB |
477 | register Lisp_Object val, tem, name1; |
478 | register struct Lisp_Process *p; | |
479 | char suffix[10]; | |
480 | register int i; | |
481 | ||
23d6bb9c KH |
482 | vec = allocate_vectorlike ((EMACS_INT) VECSIZE (struct Lisp_Process)); |
483 | for (i = 0; i < VECSIZE (struct Lisp_Process); i++) | |
484 | vec->contents[i] = Qnil; | |
485 | vec->size = VECSIZE (struct Lisp_Process); | |
486 | p = (struct Lisp_Process *)vec; | |
487 | ||
1d056e64 KH |
488 | XSETINT (p->infd, -1); |
489 | XSETINT (p->outfd, -1); | |
22719df2 KH |
490 | XSETFASTINT (p->pid, 0); |
491 | XSETFASTINT (p->tick, 0); | |
492 | XSETFASTINT (p->update_tick, 0); | |
d0d6b7c5 JB |
493 | p->raw_status_low = Qnil; |
494 | p->raw_status_high = Qnil; | |
495 | p->status = Qrun; | |
496 | p->mark = Fmake_marker (); | |
497 | ||
498 | /* If name is already in use, modify it until it is unused. */ | |
499 | ||
500 | name1 = name; | |
501 | for (i = 1; ; i++) | |
502 | { | |
503 | tem = Fget_process (name1); | |
504 | if (NILP (tem)) break; | |
505 | sprintf (suffix, "<%d>", i); | |
506 | name1 = concat2 (name, build_string (suffix)); | |
507 | } | |
508 | name = name1; | |
509 | p->name = name; | |
23d6bb9c | 510 | XSETPROCESS (val, p); |
d0d6b7c5 JB |
511 | Vprocess_alist = Fcons (Fcons (name, val), Vprocess_alist); |
512 | return val; | |
513 | } | |
514 | ||
515 | remove_process (proc) | |
516 | register Lisp_Object proc; | |
517 | { | |
518 | register Lisp_Object pair; | |
519 | ||
520 | pair = Frassq (proc, Vprocess_alist); | |
521 | Vprocess_alist = Fdelq (pair, Vprocess_alist); | |
d0d6b7c5 JB |
522 | |
523 | deactivate_process (proc); | |
524 | } | |
525 | \f | |
526 | DEFUN ("processp", Fprocessp, Sprocessp, 1, 1, 0, | |
527 | "Return t if OBJECT is a process.") | |
4ee3e309 EN |
528 | (object) |
529 | Lisp_Object object; | |
d0d6b7c5 | 530 | { |
4ee3e309 | 531 | return PROCESSP (object) ? Qt : Qnil; |
d0d6b7c5 JB |
532 | } |
533 | ||
534 | DEFUN ("get-process", Fget_process, Sget_process, 1, 1, 0, | |
535 | "Return the process named NAME, or nil if there is none.") | |
536 | (name) | |
537 | register Lisp_Object name; | |
538 | { | |
bcd69aea | 539 | if (PROCESSP (name)) |
d0d6b7c5 JB |
540 | return name; |
541 | CHECK_STRING (name, 0); | |
542 | return Fcdr (Fassoc (name, Vprocess_alist)); | |
543 | } | |
544 | ||
545 | DEFUN ("get-buffer-process", Fget_buffer_process, Sget_buffer_process, 1, 1, 0, | |
546 | "Return the (or, a) process associated with BUFFER.\n\ | |
547 | BUFFER may be a buffer or the name of one.") | |
4ee3e309 EN |
548 | (buffer) |
549 | register Lisp_Object buffer; | |
d0d6b7c5 JB |
550 | { |
551 | register Lisp_Object buf, tail, proc; | |
552 | ||
4ee3e309 EN |
553 | if (NILP (buffer)) return Qnil; |
554 | buf = Fget_buffer (buffer); | |
d0d6b7c5 JB |
555 | if (NILP (buf)) return Qnil; |
556 | ||
557 | for (tail = Vprocess_alist; !NILP (tail); tail = Fcdr (tail)) | |
558 | { | |
559 | proc = Fcdr (Fcar (tail)); | |
bcd69aea | 560 | if (PROCESSP (proc) && EQ (XPROCESS (proc)->buffer, buf)) |
d0d6b7c5 JB |
561 | return proc; |
562 | } | |
563 | return Qnil; | |
564 | } | |
565 | ||
ebb9e16f JB |
566 | /* This is how commands for the user decode process arguments. It |
567 | accepts a process, a process name, a buffer, a buffer name, or nil. | |
568 | Buffers denote the first process in the buffer, and nil denotes the | |
569 | current buffer. */ | |
d0d6b7c5 | 570 | |
77b221b1 | 571 | static Lisp_Object |
d0d6b7c5 JB |
572 | get_process (name) |
573 | register Lisp_Object name; | |
574 | { | |
1619761d KH |
575 | register Lisp_Object proc, obj; |
576 | if (STRINGP (name)) | |
577 | { | |
578 | obj = Fget_process (name); | |
579 | if (NILP (obj)) | |
580 | obj = Fget_buffer (name); | |
581 | if (NILP (obj)) | |
582 | error ("Process %s does not exist", XSTRING (name)->data); | |
583 | } | |
584 | else if (NILP (name)) | |
585 | obj = Fcurrent_buffer (); | |
d0d6b7c5 | 586 | else |
1619761d KH |
587 | obj = name; |
588 | ||
589 | /* Now obj should be either a buffer object or a process object. | |
590 | */ | |
591 | if (BUFFERP (obj)) | |
d0d6b7c5 | 592 | { |
1619761d | 593 | proc = Fget_buffer_process (obj); |
d0d6b7c5 | 594 | if (NILP (proc)) |
1619761d | 595 | error ("Buffer %s has no process", XSTRING (XBUFFER (obj)->name)->data); |
d0d6b7c5 | 596 | } |
d0d6b7c5 | 597 | else |
1619761d KH |
598 | { |
599 | CHECK_PROCESS (obj, 0); | |
600 | proc = obj; | |
601 | } | |
602 | return proc; | |
d0d6b7c5 JB |
603 | } |
604 | ||
605 | DEFUN ("delete-process", Fdelete_process, Sdelete_process, 1, 1, 0, | |
606 | "Delete PROCESS: kill it and forget about it immediately.\n\ | |
ebb9e16f JB |
607 | PROCESS may be a process, a buffer, the name of a process or buffer, or\n\ |
608 | nil, indicating the current buffer's process.") | |
4ee3e309 EN |
609 | (process) |
610 | register Lisp_Object process; | |
d0d6b7c5 | 611 | { |
4ee3e309 EN |
612 | process = get_process (process); |
613 | XPROCESS (process)->raw_status_low = Qnil; | |
614 | XPROCESS (process)->raw_status_high = Qnil; | |
615 | if (NETCONN_P (process)) | |
d0d6b7c5 | 616 | { |
4ee3e309 EN |
617 | XPROCESS (process)->status = Fcons (Qexit, Fcons (make_number (0), Qnil)); |
618 | XSETINT (XPROCESS (process)->tick, ++process_tick); | |
d0d6b7c5 | 619 | } |
4ee3e309 | 620 | else if (XINT (XPROCESS (process)->infd) >= 0) |
d0d6b7c5 | 621 | { |
4ee3e309 | 622 | Fkill_process (process, Qnil); |
d0d6b7c5 | 623 | /* Do this now, since remove_process will make sigchld_handler do nothing. */ |
4ee3e309 | 624 | XPROCESS (process)->status |
d0d6b7c5 | 625 | = Fcons (Qsignal, Fcons (make_number (SIGKILL), Qnil)); |
4ee3e309 | 626 | XSETINT (XPROCESS (process)->tick, ++process_tick); |
d0d6b7c5 JB |
627 | status_notify (); |
628 | } | |
4ee3e309 | 629 | remove_process (process); |
d0d6b7c5 JB |
630 | return Qnil; |
631 | } | |
632 | \f | |
633 | DEFUN ("process-status", Fprocess_status, Sprocess_status, 1, 1, 0, | |
634 | "Return the status of PROCESS: a symbol, one of these:\n\ | |
635 | run -- for a process that is running.\n\ | |
636 | stop -- for a process stopped but continuable.\n\ | |
637 | exit -- for a process that has exited.\n\ | |
638 | signal -- for a process that has got a fatal signal.\n\ | |
639 | open -- for a network stream connection that is open.\n\ | |
640 | closed -- for a network stream connection that is closed.\n\ | |
ebb9e16f JB |
641 | nil -- if arg is a process name and no such process exists.\n\ |
642 | PROCESS may be a process, a buffer, the name of a process or buffer, or\n\ | |
643 | nil, indicating the current buffer's process.") | |
4ee3e309 EN |
644 | (process) |
645 | register Lisp_Object process; | |
d0d6b7c5 JB |
646 | { |
647 | register struct Lisp_Process *p; | |
648 | register Lisp_Object status; | |
343f4114 | 649 | |
4ee3e309 EN |
650 | if (STRINGP (process)) |
651 | process = Fget_process (process); | |
343f4114 | 652 | else |
4ee3e309 | 653 | process = get_process (process); |
343f4114 | 654 | |
4ee3e309 EN |
655 | if (NILP (process)) |
656 | return process; | |
343f4114 | 657 | |
4ee3e309 | 658 | p = XPROCESS (process); |
d0d6b7c5 JB |
659 | if (!NILP (p->raw_status_low)) |
660 | update_status (p); | |
661 | status = p->status; | |
bcd69aea | 662 | if (CONSP (status)) |
d0d6b7c5 | 663 | status = XCONS (status)->car; |
4ee3e309 | 664 | if (NETCONN_P (process)) |
d0d6b7c5 JB |
665 | { |
666 | if (EQ (status, Qrun)) | |
667 | status = Qopen; | |
668 | else if (EQ (status, Qexit)) | |
669 | status = Qclosed; | |
670 | } | |
671 | return status; | |
672 | } | |
673 | ||
674 | DEFUN ("process-exit-status", Fprocess_exit_status, Sprocess_exit_status, | |
675 | 1, 1, 0, | |
676 | "Return the exit status of PROCESS or the signal number that killed it.\n\ | |
677 | If PROCESS has not yet exited or died, return 0.") | |
4ee3e309 EN |
678 | (process) |
679 | register Lisp_Object process; | |
d0d6b7c5 | 680 | { |
4ee3e309 EN |
681 | CHECK_PROCESS (process, 0); |
682 | if (!NILP (XPROCESS (process)->raw_status_low)) | |
683 | update_status (XPROCESS (process)); | |
684 | if (CONSP (XPROCESS (process)->status)) | |
685 | return XCONS (XCONS (XPROCESS (process)->status)->cdr)->car; | |
d0d6b7c5 JB |
686 | return make_number (0); |
687 | } | |
688 | ||
689 | DEFUN ("process-id", Fprocess_id, Sprocess_id, 1, 1, 0, | |
690 | "Return the process id of PROCESS.\n\ | |
691 | This is the pid of the Unix process which PROCESS uses or talks to.\n\ | |
692 | For a network connection, this value is nil.") | |
4ee3e309 EN |
693 | (process) |
694 | register Lisp_Object process; | |
d0d6b7c5 | 695 | { |
4ee3e309 EN |
696 | CHECK_PROCESS (process, 0); |
697 | return XPROCESS (process)->pid; | |
d0d6b7c5 JB |
698 | } |
699 | ||
700 | DEFUN ("process-name", Fprocess_name, Sprocess_name, 1, 1, 0, | |
701 | "Return the name of PROCESS, as a string.\n\ | |
702 | This is the name of the program invoked in PROCESS,\n\ | |
703 | possibly modified to make it unique among process names.") | |
4ee3e309 EN |
704 | (process) |
705 | register Lisp_Object process; | |
d0d6b7c5 | 706 | { |
4ee3e309 EN |
707 | CHECK_PROCESS (process, 0); |
708 | return XPROCESS (process)->name; | |
d0d6b7c5 JB |
709 | } |
710 | ||
711 | DEFUN ("process-command", Fprocess_command, Sprocess_command, 1, 1, 0, | |
712 | "Return the command that was executed to start PROCESS.\n\ | |
713 | This is a list of strings, the first string being the program executed\n\ | |
714 | and the rest of the strings being the arguments given to it.\n\ | |
715 | For a non-child channel, this is nil.") | |
4ee3e309 EN |
716 | (process) |
717 | register Lisp_Object process; | |
d0d6b7c5 | 718 | { |
4ee3e309 EN |
719 | CHECK_PROCESS (process, 0); |
720 | return XPROCESS (process)->command; | |
d0d6b7c5 JB |
721 | } |
722 | ||
3b9a3dfa RS |
723 | DEFUN ("process-tty-name", Fprocess_tty_name, Sprocess_tty_name, 1, 1, 0, |
724 | "Return the name of the terminal PROCESS uses, or nil if none.\n\ | |
725 | This is the terminal that the process itself reads and writes on,\n\ | |
726 | not the name of the pty that Emacs uses to talk with that terminal.") | |
4ee3e309 EN |
727 | (process) |
728 | register Lisp_Object process; | |
3b9a3dfa | 729 | { |
4ee3e309 EN |
730 | CHECK_PROCESS (process, 0); |
731 | return XPROCESS (process)->tty_name; | |
3b9a3dfa RS |
732 | } |
733 | ||
d0d6b7c5 JB |
734 | DEFUN ("set-process-buffer", Fset_process_buffer, Sset_process_buffer, |
735 | 2, 2, 0, | |
736 | "Set buffer associated with PROCESS to BUFFER (a buffer, or nil).") | |
4ee3e309 EN |
737 | (process, buffer) |
738 | register Lisp_Object process, buffer; | |
d0d6b7c5 | 739 | { |
4ee3e309 | 740 | CHECK_PROCESS (process, 0); |
d0d6b7c5 JB |
741 | if (!NILP (buffer)) |
742 | CHECK_BUFFER (buffer, 1); | |
4ee3e309 | 743 | XPROCESS (process)->buffer = buffer; |
d0d6b7c5 JB |
744 | return buffer; |
745 | } | |
746 | ||
747 | DEFUN ("process-buffer", Fprocess_buffer, Sprocess_buffer, | |
748 | 1, 1, 0, | |
749 | "Return the buffer PROCESS is associated with.\n\ | |
750 | Output from PROCESS is inserted in this buffer\n\ | |
751 | unless PROCESS has a filter.") | |
4ee3e309 EN |
752 | (process) |
753 | register Lisp_Object process; | |
d0d6b7c5 | 754 | { |
4ee3e309 EN |
755 | CHECK_PROCESS (process, 0); |
756 | return XPROCESS (process)->buffer; | |
d0d6b7c5 JB |
757 | } |
758 | ||
759 | DEFUN ("process-mark", Fprocess_mark, Sprocess_mark, | |
760 | 1, 1, 0, | |
761 | "Return the marker for the end of the last output from PROCESS.") | |
4ee3e309 EN |
762 | (process) |
763 | register Lisp_Object process; | |
d0d6b7c5 | 764 | { |
4ee3e309 EN |
765 | CHECK_PROCESS (process, 0); |
766 | return XPROCESS (process)->mark; | |
d0d6b7c5 JB |
767 | } |
768 | ||
769 | DEFUN ("set-process-filter", Fset_process_filter, Sset_process_filter, | |
770 | 2, 2, 0, | |
771 | "Give PROCESS the filter function FILTER; nil means no filter.\n\ | |
20ddfff7 | 772 | t means stop accepting output from the process.\n\ |
d0d6b7c5 JB |
773 | When a process has a filter, each time it does output\n\ |
774 | the entire string of output is passed to the filter.\n\ | |
775 | The filter gets two arguments: the process and the string of output.\n\ | |
776 | If the process has a filter, its buffer is not used for output.") | |
4ee3e309 EN |
777 | (process, filter) |
778 | register Lisp_Object process, filter; | |
d0d6b7c5 | 779 | { |
4ee3e309 | 780 | CHECK_PROCESS (process, 0); |
20ddfff7 | 781 | if (EQ (filter, Qt)) |
a69281ff | 782 | { |
4ee3e309 EN |
783 | FD_CLR (XINT (XPROCESS (process)->infd), &input_wait_mask); |
784 | FD_CLR (XINT (XPROCESS (process)->infd), &non_keyboard_wait_mask); | |
a69281ff | 785 | } |
4ee3e309 | 786 | else if (EQ (XPROCESS (process)->filter, Qt)) |
a69281ff | 787 | { |
4ee3e309 EN |
788 | FD_SET (XINT (XPROCESS (process)->infd), &input_wait_mask); |
789 | FD_SET (XINT (XPROCESS (process)->infd), &non_keyboard_wait_mask); | |
a69281ff | 790 | } |
4ee3e309 | 791 | XPROCESS (process)->filter = filter; |
d0d6b7c5 JB |
792 | return filter; |
793 | } | |
794 | ||
795 | DEFUN ("process-filter", Fprocess_filter, Sprocess_filter, | |
796 | 1, 1, 0, | |
797 | "Returns the filter function of PROCESS; nil if none.\n\ | |
798 | See `set-process-filter' for more info on filter functions.") | |
4ee3e309 EN |
799 | (process) |
800 | register Lisp_Object process; | |
d0d6b7c5 | 801 | { |
4ee3e309 EN |
802 | CHECK_PROCESS (process, 0); |
803 | return XPROCESS (process)->filter; | |
d0d6b7c5 JB |
804 | } |
805 | ||
806 | DEFUN ("set-process-sentinel", Fset_process_sentinel, Sset_process_sentinel, | |
807 | 2, 2, 0, | |
808 | "Give PROCESS the sentinel SENTINEL; nil for none.\n\ | |
809 | The sentinel is called as a function when the process changes state.\n\ | |
810 | It gets two arguments: the process, and a string describing the change.") | |
4ee3e309 EN |
811 | (process, sentinel) |
812 | register Lisp_Object process, sentinel; | |
d0d6b7c5 | 813 | { |
4ee3e309 EN |
814 | CHECK_PROCESS (process, 0); |
815 | XPROCESS (process)->sentinel = sentinel; | |
d0d6b7c5 JB |
816 | return sentinel; |
817 | } | |
818 | ||
819 | DEFUN ("process-sentinel", Fprocess_sentinel, Sprocess_sentinel, | |
820 | 1, 1, 0, | |
821 | "Return the sentinel of PROCESS; nil if none.\n\ | |
822 | See `set-process-sentinel' for more info on sentinels.") | |
4ee3e309 EN |
823 | (process) |
824 | register Lisp_Object process; | |
d0d6b7c5 | 825 | { |
4ee3e309 EN |
826 | CHECK_PROCESS (process, 0); |
827 | return XPROCESS (process)->sentinel; | |
d0d6b7c5 JB |
828 | } |
829 | ||
396df322 RS |
830 | DEFUN ("set-process-window-size", Fset_process_window_size, |
831 | Sset_process_window_size, 3, 3, 0, | |
832 | "Tell PROCESS that it has logical window size HEIGHT and WIDTH.") | |
4ee3e309 EN |
833 | (process, height, width) |
834 | register Lisp_Object process, height, width; | |
396df322 | 835 | { |
4ee3e309 | 836 | CHECK_PROCESS (process, 0); |
396df322 RS |
837 | CHECK_NATNUM (height, 0); |
838 | CHECK_NATNUM (width, 0); | |
4ee3e309 | 839 | if (set_window_size (XINT (XPROCESS (process)->infd), |
396df322 RS |
840 | XINT (height), XINT(width)) <= 0) |
841 | return Qnil; | |
842 | else | |
843 | return Qt; | |
844 | } | |
845 | ||
d0d6b7c5 JB |
846 | DEFUN ("process-kill-without-query", Fprocess_kill_without_query, |
847 | Sprocess_kill_without_query, 1, 2, 0, | |
848 | "Say no query needed if PROCESS is running when Emacs is exited.\n\ | |
f2d2dbfe | 849 | Optional second argument if non-nil says to require a query.\n\ |
d0d6b7c5 | 850 | Value is t if a query was formerly required.") |
4ee3e309 EN |
851 | (process, value) |
852 | register Lisp_Object process, value; | |
d0d6b7c5 JB |
853 | { |
854 | Lisp_Object tem; | |
855 | ||
4ee3e309 EN |
856 | CHECK_PROCESS (process, 0); |
857 | tem = XPROCESS (process)->kill_without_query; | |
858 | XPROCESS (process)->kill_without_query = Fnull (value); | |
d0d6b7c5 JB |
859 | |
860 | return Fnull (tem); | |
861 | } | |
312c9964 | 862 | |
de282a05 RS |
863 | DEFUN ("process-contact", Fprocess_contact, Sprocess_contact, |
864 | 1, 1, 0, | |
865 | "Return the contact info of PROCESS; t for a real child.\n\ | |
866 | For a net connection, the value is a cons cell of the form (HOST SERVICE).") | |
867 | (process) | |
868 | register Lisp_Object process; | |
869 | { | |
870 | CHECK_PROCESS (process, 0); | |
871 | return XPROCESS (process)->childp; | |
872 | } | |
873 | ||
312c9964 RS |
874 | #if 0 /* Turned off because we don't currently record this info |
875 | in the process. Perhaps add it. */ | |
876 | DEFUN ("process-connection", Fprocess_connection, Sprocess_connection, 1, 1, 0, | |
877 | "Return the connection type of `PROCESS'.\n\ | |
878 | The value is `nil' for a pipe,\n\ | |
879 | `t' or `pty' for a pty, or `stream' for a socket connection.") | |
880 | (process) | |
881 | Lisp_Object process; | |
882 | { | |
883 | return XPROCESS (process)->type; | |
884 | } | |
885 | #endif | |
d0d6b7c5 JB |
886 | \f |
887 | Lisp_Object | |
888 | list_processes_1 () | |
889 | { | |
890 | register Lisp_Object tail, tem; | |
891 | Lisp_Object proc, minspace, tem1; | |
892 | register struct buffer *old = current_buffer; | |
893 | register struct Lisp_Process *p; | |
894 | register int state; | |
895 | char tembuf[80]; | |
896 | ||
22719df2 | 897 | XSETFASTINT (minspace, 1); |
d0d6b7c5 JB |
898 | |
899 | set_buffer_internal (XBUFFER (Vstandard_output)); | |
900 | Fbuffer_disable_undo (Vstandard_output); | |
901 | ||
902 | current_buffer->truncate_lines = Qt; | |
903 | ||
904 | write_string ("\ | |
a9fde32e KH |
905 | Proc Status Buffer Tty Command\n\ |
906 | ---- ------ ------ --- -------\n", -1); | |
d0d6b7c5 JB |
907 | |
908 | for (tail = Vprocess_alist; !NILP (tail); tail = Fcdr (tail)) | |
909 | { | |
910 | Lisp_Object symbol; | |
911 | ||
912 | proc = Fcdr (Fcar (tail)); | |
913 | p = XPROCESS (proc); | |
914 | if (NILP (p->childp)) | |
915 | continue; | |
916 | ||
917 | Finsert (1, &p->name); | |
918 | Findent_to (make_number (13), minspace); | |
919 | ||
920 | if (!NILP (p->raw_status_low)) | |
921 | update_status (p); | |
922 | symbol = p->status; | |
bcd69aea | 923 | if (CONSP (p->status)) |
d0d6b7c5 JB |
924 | symbol = XCONS (p->status)->car; |
925 | ||
926 | ||
927 | if (EQ (symbol, Qsignal)) | |
928 | { | |
929 | Lisp_Object tem; | |
930 | tem = Fcar (Fcdr (p->status)); | |
931 | #ifdef VMS | |
932 | if (XINT (tem) < NSIG) | |
b0310da4 | 933 | write_string (sys_errlist [XINT (tem)], -1); |
d0d6b7c5 JB |
934 | else |
935 | #endif | |
936 | Fprinc (symbol, Qnil); | |
937 | } | |
938 | else if (NETCONN_P (proc)) | |
939 | { | |
940 | if (EQ (symbol, Qrun)) | |
941 | write_string ("open", -1); | |
942 | else if (EQ (symbol, Qexit)) | |
943 | write_string ("closed", -1); | |
944 | else | |
945 | Fprinc (symbol, Qnil); | |
946 | } | |
947 | else | |
948 | Fprinc (symbol, Qnil); | |
949 | ||
950 | if (EQ (symbol, Qexit)) | |
951 | { | |
952 | Lisp_Object tem; | |
953 | tem = Fcar (Fcdr (p->status)); | |
954 | if (XFASTINT (tem)) | |
955 | { | |
3162bafa | 956 | sprintf (tembuf, " %d", (int) XFASTINT (tem)); |
d0d6b7c5 JB |
957 | write_string (tembuf, -1); |
958 | } | |
959 | } | |
960 | ||
961 | if (EQ (symbol, Qsignal) || EQ (symbol, Qexit)) | |
962 | remove_process (proc); | |
963 | ||
964 | Findent_to (make_number (22), minspace); | |
965 | if (NILP (p->buffer)) | |
966 | insert_string ("(none)"); | |
967 | else if (NILP (XBUFFER (p->buffer)->name)) | |
968 | insert_string ("(Killed)"); | |
969 | else | |
970 | Finsert (1, &XBUFFER (p->buffer)->name); | |
971 | ||
972 | Findent_to (make_number (37), minspace); | |
973 | ||
a9fde32e KH |
974 | if (STRINGP (p->tty_name)) |
975 | Finsert (1, &p->tty_name); | |
976 | else | |
977 | insert_string ("(none)"); | |
978 | ||
979 | Findent_to (make_number (49), minspace); | |
980 | ||
d0d6b7c5 JB |
981 | if (NETCONN_P (proc)) |
982 | { | |
983 | sprintf (tembuf, "(network stream connection to %s)\n", | |
de282a05 | 984 | XSTRING (XCONS (p->childp)->car)->data); |
d0d6b7c5 JB |
985 | insert_string (tembuf); |
986 | } | |
987 | else | |
988 | { | |
989 | tem = p->command; | |
990 | while (1) | |
991 | { | |
992 | tem1 = Fcar (tem); | |
993 | Finsert (1, &tem1); | |
994 | tem = Fcdr (tem); | |
995 | if (NILP (tem)) | |
996 | break; | |
997 | insert_string (" "); | |
998 | } | |
999 | insert_string ("\n"); | |
1000 | } | |
1001 | } | |
1002 | return Qnil; | |
1003 | } | |
1004 | ||
1005 | DEFUN ("list-processes", Flist_processes, Slist_processes, 0, 0, "", | |
1006 | "Display a list of all processes.\n\ | |
1007 | \(Any processes listed as Exited or Signaled are actually eliminated\n\ | |
1008 | after the listing is made.)") | |
1009 | () | |
1010 | { | |
1011 | internal_with_output_to_temp_buffer ("*Process List*", | |
1012 | list_processes_1, Qnil); | |
1013 | return Qnil; | |
1014 | } | |
1015 | ||
1016 | DEFUN ("process-list", Fprocess_list, Sprocess_list, 0, 0, 0, | |
1017 | "Return a list of all processes.") | |
1018 | () | |
1019 | { | |
1020 | return Fmapcar (Qcdr, Vprocess_alist); | |
1021 | } | |
1022 | \f | |
b0310da4 JB |
1023 | /* Starting asynchronous inferior processes. */ |
1024 | ||
1025 | static Lisp_Object start_process_unwind (); | |
1026 | ||
d0d6b7c5 JB |
1027 | DEFUN ("start-process", Fstart_process, Sstart_process, 3, MANY, 0, |
1028 | "Start a program in a subprocess. Return the process object for it.\n\ | |
1029 | Args are NAME BUFFER PROGRAM &rest PROGRAM-ARGS\n\ | |
1030 | NAME is name for process. It is modified if necessary to make it unique.\n\ | |
1031 | BUFFER is the buffer or (buffer-name) to associate with the process.\n\ | |
1032 | Process output goes at end of that buffer, unless you specify\n\ | |
1033 | an output stream or filter function to handle the output.\n\ | |
1034 | BUFFER may be also nil, meaning that this process is not associated\n\ | |
0fa1789e | 1035 | with any buffer.\n\ |
d0d6b7c5 JB |
1036 | Third arg is program file name. It is searched for as in the shell.\n\ |
1037 | Remaining arguments are strings to give program as arguments.") | |
1038 | (nargs, args) | |
1039 | int nargs; | |
1040 | register Lisp_Object *args; | |
1041 | { | |
1e30af70 | 1042 | Lisp_Object buffer, name, program, proc, current_dir, tem; |
d0d6b7c5 JB |
1043 | #ifdef VMS |
1044 | register unsigned char *new_argv; | |
1045 | int len; | |
1046 | #else | |
1047 | register unsigned char **new_argv; | |
1048 | #endif | |
1049 | register int i; | |
b0310da4 | 1050 | int count = specpdl_ptr - specpdl; |
d0d6b7c5 JB |
1051 | |
1052 | buffer = args[1]; | |
1053 | if (!NILP (buffer)) | |
1054 | buffer = Fget_buffer_create (buffer); | |
1055 | ||
1e30af70 JB |
1056 | /* Make sure that the child will be able to chdir to the current |
1057 | buffer's current directory, or its unhandled equivalent. We | |
1058 | can't just have the child check for an error when it does the | |
1059 | chdir, since it's in a vfork. | |
1060 | ||
1061 | We have to GCPRO around this because Fexpand_file_name and | |
1062 | Funhandled_file_name_directory might call a file name handling | |
1063 | function. The argument list is protected by the caller, so all | |
1064 | we really have to worry about is buffer. */ | |
1065 | { | |
1066 | struct gcpro gcpro1, gcpro2; | |
1067 | ||
1068 | current_dir = current_buffer->directory; | |
1069 | ||
1070 | GCPRO2 (buffer, current_dir); | |
1071 | ||
7af71e17 RS |
1072 | current_dir |
1073 | = expand_and_dir_to_file (Funhandled_file_name_directory (current_dir), | |
1074 | Qnil); | |
1e30af70 JB |
1075 | if (NILP (Ffile_accessible_directory_p (current_dir))) |
1076 | report_file_error ("Setting current directory", | |
1077 | Fcons (current_buffer->directory, Qnil)); | |
1078 | ||
1079 | UNGCPRO; | |
1080 | } | |
1081 | ||
d0d6b7c5 JB |
1082 | name = args[0]; |
1083 | CHECK_STRING (name, 0); | |
1084 | ||
1085 | program = args[2]; | |
1086 | ||
1087 | CHECK_STRING (program, 2); | |
1088 | ||
1089 | #ifdef VMS | |
1090 | /* Make a one member argv with all args concatenated | |
1091 | together separated by a blank. */ | |
1d2fc612 | 1092 | len = XSTRING (program)->size_byte + 2; |
d0d6b7c5 JB |
1093 | for (i = 3; i < nargs; i++) |
1094 | { | |
1095 | tem = args[i]; | |
1096 | CHECK_STRING (tem, i); | |
1d2fc612 | 1097 | len += XSTRING (tem)->size_byte + 1; /* count the blank */ |
d0d6b7c5 JB |
1098 | } |
1099 | new_argv = (unsigned char *) alloca (len); | |
1100 | strcpy (new_argv, XSTRING (program)->data); | |
1101 | for (i = 3; i < nargs; i++) | |
1102 | { | |
1103 | tem = args[i]; | |
1104 | CHECK_STRING (tem, i); | |
1105 | strcat (new_argv, " "); | |
1106 | strcat (new_argv, XSTRING (tem)->data); | |
1107 | } | |
b0310da4 JB |
1108 | /* Need to add code here to check for program existence on VMS */ |
1109 | ||
d0d6b7c5 JB |
1110 | #else /* not VMS */ |
1111 | new_argv = (unsigned char **) alloca ((nargs - 1) * sizeof (char *)); | |
1112 | ||
d0d6b7c5 | 1113 | /* If program file name is not absolute, search our path for it */ |
e98d950b RS |
1114 | if (!IS_DIRECTORY_SEP (XSTRING (program)->data[0]) |
1115 | && !(XSTRING (program)->size > 1 | |
1116 | && IS_DEVICE_SEP (XSTRING (program)->data[1]))) | |
d0d6b7c5 | 1117 | { |
3b639868 KH |
1118 | struct gcpro gcpro1, gcpro2, gcpro3, gcpro4; |
1119 | ||
d0d6b7c5 | 1120 | tem = Qnil; |
3b639868 | 1121 | GCPRO4 (name, program, buffer, current_dir); |
5437e9f9 | 1122 | openp (Vexec_path, program, EXEC_SUFFIXES, &tem, 1); |
3b639868 | 1123 | UNGCPRO; |
d0d6b7c5 JB |
1124 | if (NILP (tem)) |
1125 | report_file_error ("Searching for program", Fcons (program, Qnil)); | |
f8a87498 | 1126 | tem = Fexpand_file_name (tem, Qnil); |
d0d6b7c5 JB |
1127 | new_argv[0] = XSTRING (tem)->data; |
1128 | } | |
3b639868 | 1129 | else |
13373f4e RS |
1130 | { |
1131 | if (!NILP (Ffile_directory_p (program))) | |
1132 | error ("Specified program for new process is a directory"); | |
1133 | ||
1134 | new_argv[0] = XSTRING (program)->data; | |
1135 | } | |
3b639868 KH |
1136 | |
1137 | for (i = 3; i < nargs; i++) | |
1138 | { | |
1139 | tem = args[i]; | |
1140 | CHECK_STRING (tem, i); | |
1141 | new_argv[i - 2] = XSTRING (tem)->data; | |
1142 | } | |
1143 | new_argv[i - 2] = 0; | |
d0d6b7c5 JB |
1144 | #endif /* not VMS */ |
1145 | ||
1146 | proc = make_process (name); | |
b0310da4 JB |
1147 | /* If an error occurs and we can't start the process, we want to |
1148 | remove it from the process list. This means that each error | |
1149 | check in create_process doesn't need to call remove_process | |
1150 | itself; it's all taken care of here. */ | |
1151 | record_unwind_protect (start_process_unwind, proc); | |
d0d6b7c5 JB |
1152 | |
1153 | XPROCESS (proc)->childp = Qt; | |
1154 | XPROCESS (proc)->command_channel_p = Qnil; | |
1155 | XPROCESS (proc)->buffer = buffer; | |
1156 | XPROCESS (proc)->sentinel = Qnil; | |
1157 | XPROCESS (proc)->filter = Qnil; | |
1158 | XPROCESS (proc)->command = Flist (nargs - 2, args + 2); | |
1159 | ||
7af71e17 RS |
1160 | /* Make the process marker point into the process buffer (if any). */ |
1161 | if (!NILP (buffer)) | |
d8a2934e RS |
1162 | set_marker_both (XPROCESS (proc)->mark, buffer, |
1163 | BUF_ZV (XBUFFER (buffer)), | |
1164 | BUF_ZV_BYTE (XBUFFER (buffer))); | |
7af71e17 | 1165 | |
c7580538 KH |
1166 | if (!NILP (buffer) && NILP (XBUFFER (buffer)->enable_multibyte_characters) |
1167 | || NILP (buffer) && NILP (buffer_defaults.enable_multibyte_characters)) | |
1168 | { | |
1169 | XPROCESS (proc)->decode_coding_system = Qnil; | |
1170 | XPROCESS (proc)->encode_coding_system = Qnil; | |
1171 | } | |
1172 | else | |
1173 | { | |
1174 | /* Setup coding systems for communicating with the process. */ | |
715f7577 | 1175 | /* Qt denotes we have not yet called Ffind_operation_coding_system. */ |
c7580538 KH |
1176 | Lisp_Object coding_systems = Qt; |
1177 | Lisp_Object val, *args2; | |
1178 | struct gcpro gcpro1; | |
0fa1789e | 1179 | |
11f84d7d KH |
1180 | if (!NILP (Vcoding_system_for_read)) |
1181 | val = Vcoding_system_for_read; | |
1182 | else if (NILP (current_buffer->enable_multibyte_characters)) | |
e7fbaa65 | 1183 | val = Qraw_text; |
11f84d7d | 1184 | else |
c7580538 KH |
1185 | { |
1186 | args2 = (Lisp_Object *) alloca ((nargs + 1) * sizeof *args2); | |
1187 | args2[0] = Qstart_process; | |
1188 | for (i = 0; i < nargs; i++) args2[i + 1] = args[i]; | |
1189 | GCPRO1 (proc); | |
715f7577 | 1190 | coding_systems = Ffind_operation_coding_system (nargs + 1, args2); |
c7580538 KH |
1191 | UNGCPRO; |
1192 | if (CONSP (coding_systems)) | |
1193 | val = XCONS (coding_systems)->car; | |
83502605 KH |
1194 | else if (CONSP (Vdefault_process_coding_system)) |
1195 | val = XCONS (Vdefault_process_coding_system)->car; | |
11f84d7d KH |
1196 | else |
1197 | val = Qnil; | |
c7580538 KH |
1198 | } |
1199 | XPROCESS (proc)->decode_coding_system = val; | |
0fa1789e | 1200 | |
11f84d7d KH |
1201 | if (!NILP (Vcoding_system_for_write)) |
1202 | val = Vcoding_system_for_write; | |
1203 | else if (NILP (current_buffer->enable_multibyte_characters)) | |
1204 | val = Qnil; | |
1205 | else | |
c7580538 KH |
1206 | { |
1207 | if (EQ (coding_systems, Qt)) | |
1208 | { | |
1209 | args2 = (Lisp_Object *) alloca ((nargs + 1) * sizeof args2); | |
1210 | args2[0] = Qstart_process; | |
1211 | for (i = 0; i < nargs; i++) args2[i + 1] = args[i]; | |
1212 | GCPRO1 (proc); | |
715f7577 KH |
1213 | coding_systems = |
1214 | Ffind_operation_coding_system (nargs + 1, args2); | |
c7580538 KH |
1215 | UNGCPRO; |
1216 | } | |
1217 | if (CONSP (coding_systems)) | |
1218 | val = XCONS (coding_systems)->cdr; | |
83502605 KH |
1219 | else if (CONSP (Vdefault_process_coding_system)) |
1220 | val = XCONS (Vdefault_process_coding_system)->cdr; | |
11f84d7d KH |
1221 | else |
1222 | val = Qnil; | |
c7580538 KH |
1223 | } |
1224 | XPROCESS (proc)->encode_coding_system = val; | |
1225 | } | |
0fa1789e KH |
1226 | |
1227 | XPROCESS (proc)->decoding_buf = make_uninit_string (0); | |
e7fbaa65 | 1228 | XPROCESS (proc)->decoding_carryover = make_number (0); |
0fa1789e | 1229 | XPROCESS (proc)->encoding_buf = make_uninit_string (0); |
e7fbaa65 | 1230 | XPROCESS (proc)->encoding_carryover = make_number (0); |
0fa1789e | 1231 | |
6b53bb85 | 1232 | create_process (proc, (char **) new_argv, current_dir); |
d0d6b7c5 | 1233 | |
b0310da4 | 1234 | return unbind_to (count, proc); |
d0d6b7c5 JB |
1235 | } |
1236 | ||
b0310da4 | 1237 | /* This function is the unwind_protect form for Fstart_process. If |
8e6208c5 | 1238 | PROC doesn't have its pid set, then we know someone has signaled |
b0310da4 JB |
1239 | an error and the process wasn't started successfully, so we should |
1240 | remove it from the process list. */ | |
1241 | static Lisp_Object | |
1242 | start_process_unwind (proc) | |
1243 | Lisp_Object proc; | |
1244 | { | |
bcd69aea | 1245 | if (!PROCESSP (proc)) |
b0310da4 JB |
1246 | abort (); |
1247 | ||
1248 | /* Was PROC started successfully? */ | |
188d6c4e | 1249 | if (XINT (XPROCESS (proc)->pid) <= 0) |
b0310da4 JB |
1250 | remove_process (proc); |
1251 | ||
1252 | return Qnil; | |
1253 | } | |
1254 | ||
1255 | ||
d0d6b7c5 JB |
1256 | SIGTYPE |
1257 | create_process_1 (signo) | |
1258 | int signo; | |
1259 | { | |
3c0ee47b | 1260 | #if defined (USG) && !defined (POSIX_SIGNALS) |
d0d6b7c5 JB |
1261 | /* USG systems forget handlers when they are used; |
1262 | must reestablish each time */ | |
1263 | signal (signo, create_process_1); | |
1264 | #endif /* USG */ | |
1265 | } | |
1266 | ||
1267 | #if 0 /* This doesn't work; see the note before sigchld_handler. */ | |
1268 | #ifdef USG | |
1269 | #ifdef SIGCHLD | |
1270 | /* Mimic blocking of signals on system V, which doesn't really have it. */ | |
1271 | ||
1272 | /* Nonzero means we got a SIGCHLD when it was supposed to be blocked. */ | |
1273 | int sigchld_deferred; | |
1274 | ||
1275 | SIGTYPE | |
1276 | create_process_sigchld () | |
1277 | { | |
1278 | signal (SIGCHLD, create_process_sigchld); | |
1279 | ||
1280 | sigchld_deferred = 1; | |
1281 | } | |
1282 | #endif | |
1283 | #endif | |
1284 | #endif | |
1285 | ||
1286 | #ifndef VMS /* VMS version of this function is in vmsproc.c. */ | |
6b53bb85 | 1287 | void |
1e30af70 | 1288 | create_process (process, new_argv, current_dir) |
d0d6b7c5 JB |
1289 | Lisp_Object process; |
1290 | char **new_argv; | |
1e30af70 | 1291 | Lisp_Object current_dir; |
d0d6b7c5 | 1292 | { |
ecd1f654 | 1293 | int pid, inchannel, outchannel; |
d0d6b7c5 | 1294 | int sv[2]; |
0dc70c33 KH |
1295 | #ifdef POSIX_SIGNALS |
1296 | sigset_t procmask; | |
1297 | sigset_t blocked; | |
1298 | struct sigaction sigint_action; | |
1299 | struct sigaction sigquit_action; | |
1300 | #ifdef AIX | |
1301 | struct sigaction sighup_action; | |
1302 | #endif | |
1303 | #else /* !POSIX_SIGNALS */ | |
d0d6b7c5 JB |
1304 | #ifdef SIGCHLD |
1305 | SIGTYPE (*sigchld)(); | |
1306 | #endif | |
0dc70c33 | 1307 | #endif /* !POSIX_SIGNALS */ |
ecd1f654 KH |
1308 | /* Use volatile to protect variables from being clobbered by longjmp. */ |
1309 | volatile int forkin, forkout; | |
1310 | volatile int pty_flag = 0; | |
d0d6b7c5 JB |
1311 | extern char **environ; |
1312 | ||
d0d6b7c5 JB |
1313 | inchannel = outchannel = -1; |
1314 | ||
1315 | #ifdef HAVE_PTYS | |
fe45da4e | 1316 | if (!NILP (Vprocess_connection_type)) |
d0d6b7c5 JB |
1317 | outchannel = inchannel = allocate_pty (); |
1318 | ||
d0d6b7c5 JB |
1319 | if (inchannel >= 0) |
1320 | { | |
1321 | #ifndef USG | |
1322 | /* On USG systems it does not work to open the pty's tty here | |
1323 | and then close and reopen it in the child. */ | |
1324 | #ifdef O_NOCTTY | |
1325 | /* Don't let this terminal become our controlling terminal | |
1326 | (in case we don't have one). */ | |
1327 | forkout = forkin = open (pty_name, O_RDWR | O_NOCTTY, 0); | |
1328 | #else | |
1329 | forkout = forkin = open (pty_name, O_RDWR, 0); | |
1330 | #endif | |
1331 | if (forkin < 0) | |
1332 | report_file_error ("Opening pty", Qnil); | |
1333 | #else | |
1334 | forkin = forkout = -1; | |
1335 | #endif /* not USG */ | |
1336 | pty_flag = 1; | |
1337 | } | |
1338 | else | |
1339 | #endif /* HAVE_PTYS */ | |
1340 | #ifdef SKTPAIR | |
1341 | { | |
1342 | if (socketpair (AF_UNIX, SOCK_STREAM, 0, sv) < 0) | |
1343 | report_file_error ("Opening socketpair", Qnil); | |
1344 | outchannel = inchannel = sv[0]; | |
1345 | forkout = forkin = sv[1]; | |
1346 | } | |
1347 | #else /* not SKTPAIR */ | |
1348 | { | |
1349 | pipe (sv); | |
1350 | inchannel = sv[0]; | |
1351 | forkout = sv[1]; | |
1352 | pipe (sv); | |
1353 | outchannel = sv[1]; | |
1354 | forkin = sv[0]; | |
1355 | } | |
1356 | #endif /* not SKTPAIR */ | |
1357 | ||
1358 | #if 0 | |
1359 | /* Replaced by close_process_descs */ | |
1360 | set_exclusive_use (inchannel); | |
1361 | set_exclusive_use (outchannel); | |
1362 | #endif | |
1363 | ||
1364 | /* Stride people say it's a mystery why this is needed | |
1365 | as well as the O_NDELAY, but that it fails without this. */ | |
1366 | #if defined (STRIDE) || (defined (pfa) && defined (HAVE_PTYS)) | |
1367 | { | |
1368 | int one = 1; | |
1369 | ioctl (inchannel, FIONBIO, &one); | |
1370 | } | |
1371 | #endif | |
1372 | ||
1373 | #ifdef O_NONBLOCK | |
1374 | fcntl (inchannel, F_SETFL, O_NONBLOCK); | |
03832893 | 1375 | fcntl (outchannel, F_SETFL, O_NONBLOCK); |
d0d6b7c5 JB |
1376 | #else |
1377 | #ifdef O_NDELAY | |
1378 | fcntl (inchannel, F_SETFL, O_NDELAY); | |
03832893 | 1379 | fcntl (outchannel, F_SETFL, O_NDELAY); |
d0d6b7c5 JB |
1380 | #endif |
1381 | #endif | |
1382 | ||
1383 | /* Record this as an active process, with its channels. | |
1384 | As a result, child_setup will close Emacs's side of the pipes. */ | |
1385 | chan_process[inchannel] = process; | |
1d056e64 KH |
1386 | XSETINT (XPROCESS (process)->infd, inchannel); |
1387 | XSETINT (XPROCESS (process)->outfd, outchannel); | |
d0d6b7c5 JB |
1388 | /* Record the tty descriptor used in the subprocess. */ |
1389 | if (forkin < 0) | |
1390 | XPROCESS (process)->subtty = Qnil; | |
1391 | else | |
22719df2 | 1392 | XSETFASTINT (XPROCESS (process)->subtty, forkin); |
d0d6b7c5 JB |
1393 | XPROCESS (process)->pty_flag = (pty_flag ? Qt : Qnil); |
1394 | XPROCESS (process)->status = Qrun; | |
c7580538 KH |
1395 | if (!proc_decode_coding_system[inchannel]) |
1396 | proc_decode_coding_system[inchannel] | |
1397 | = (struct coding_system *) xmalloc (sizeof (struct coding_system)); | |
0fa1789e | 1398 | setup_coding_system (XPROCESS (process)->decode_coding_system, |
c7580538 KH |
1399 | proc_decode_coding_system[inchannel]); |
1400 | if (!proc_encode_coding_system[outchannel]) | |
1401 | proc_encode_coding_system[outchannel] | |
1402 | = (struct coding_system *) xmalloc (sizeof (struct coding_system)); | |
0fa1789e | 1403 | setup_coding_system (XPROCESS (process)->encode_coding_system, |
c7580538 | 1404 | proc_encode_coding_system[outchannel]); |
d0d6b7c5 | 1405 | |
1a283a4c KH |
1406 | if (CODING_REQUIRE_ENCODING (proc_encode_coding_system[outchannel])) |
1407 | { | |
1408 | /* Here we encode arguments by the coding system used for | |
1409 | sending data to the process. We don't support using | |
1410 | different coding systems for encoding arguments and for | |
1411 | encoding data sent to the process. */ | |
1412 | struct gcpro gcpro1; | |
1413 | int i = 1; | |
1414 | struct coding_system *coding = proc_encode_coding_system[outchannel]; | |
1415 | ||
e7fbaa65 | 1416 | coding->mode |= CODING_MODE_LAST_BLOCK; |
1a283a4c KH |
1417 | GCPRO1 (process); |
1418 | while (new_argv[i] != 0) | |
1419 | { | |
1420 | int len = strlen (new_argv[i]); | |
1421 | int size = encoding_buffer_size (coding, len); | |
1422 | unsigned char *buf = (unsigned char *) alloca (size); | |
1a283a4c | 1423 | |
e7fbaa65 KH |
1424 | encode_coding (coding, new_argv[i], buf, len, size); |
1425 | buf[coding->produced] = 0; | |
1a283a4c KH |
1426 | /* We don't have to free new_argv[i] because it points to a |
1427 | Lisp string given as an argument to `start-process'. */ | |
1428 | new_argv[i++] = buf; | |
1429 | } | |
1430 | UNGCPRO; | |
e7fbaa65 | 1431 | coding->mode &= ~CODING_MODE_LAST_BLOCK; |
1a283a4c KH |
1432 | } |
1433 | ||
d0d6b7c5 JB |
1434 | /* Delay interrupts until we have a chance to store |
1435 | the new fork's pid in its process structure */ | |
0dc70c33 KH |
1436 | #ifdef POSIX_SIGNALS |
1437 | sigemptyset (&blocked); | |
1438 | #ifdef SIGCHLD | |
1439 | sigaddset (&blocked, SIGCHLD); | |
1440 | #endif | |
1441 | #ifdef HAVE_VFORK | |
1442 | /* On many hosts (e.g. Solaris 2.4), if a vforked child calls `signal', | |
1443 | this sets the parent's signal handlers as well as the child's. | |
1444 | So delay all interrupts whose handlers the child might munge, | |
1445 | and record the current handlers so they can be restored later. */ | |
1446 | sigaddset (&blocked, SIGINT ); sigaction (SIGINT , 0, &sigint_action ); | |
1447 | sigaddset (&blocked, SIGQUIT); sigaction (SIGQUIT, 0, &sigquit_action); | |
1448 | #ifdef AIX | |
1449 | sigaddset (&blocked, SIGHUP ); sigaction (SIGHUP , 0, &sighup_action ); | |
1450 | #endif | |
1451 | #endif /* HAVE_VFORK */ | |
1452 | sigprocmask (SIG_BLOCK, &blocked, &procmask); | |
1453 | #else /* !POSIX_SIGNALS */ | |
d0d6b7c5 JB |
1454 | #ifdef SIGCHLD |
1455 | #ifdef BSD4_1 | |
1456 | sighold (SIGCHLD); | |
1457 | #else /* not BSD4_1 */ | |
6df54671 | 1458 | #if defined (BSD_SYSTEM) || defined (UNIPLUS) || defined (HPUX) |
d0d6b7c5 JB |
1459 | sigsetmask (sigmask (SIGCHLD)); |
1460 | #else /* ordinary USG */ | |
1461 | #if 0 | |
1462 | sigchld_deferred = 0; | |
1463 | sigchld = signal (SIGCHLD, create_process_sigchld); | |
1464 | #endif | |
1465 | #endif /* ordinary USG */ | |
1466 | #endif /* not BSD4_1 */ | |
1467 | #endif /* SIGCHLD */ | |
0dc70c33 | 1468 | #endif /* !POSIX_SIGNALS */ |
d0d6b7c5 | 1469 | |
3081bf8d | 1470 | FD_SET (inchannel, &input_wait_mask); |
a69281ff | 1471 | FD_SET (inchannel, &non_keyboard_wait_mask); |
3081bf8d KH |
1472 | if (inchannel > max_process_desc) |
1473 | max_process_desc = inchannel; | |
1474 | ||
d0d6b7c5 JB |
1475 | /* Until we store the proper pid, enable sigchld_handler |
1476 | to recognize an unknown pid as standing for this process. | |
1477 | It is very important not to let this `marker' value stay | |
1478 | in the table after this function has returned; if it does | |
1479 | it might cause call-process to hang and subsequent asynchronous | |
1480 | processes to get their return values scrambled. */ | |
1481 | XSETINT (XPROCESS (process)->pid, -1); | |
1482 | ||
ececcbec RS |
1483 | BLOCK_INPUT; |
1484 | ||
d0d6b7c5 JB |
1485 | { |
1486 | /* child_setup must clobber environ on systems with true vfork. | |
1487 | Protect it from permanent change. */ | |
1488 | char **save_environ = environ; | |
1489 | ||
a932f187 RS |
1490 | current_dir |
1491 | = Fencode_coding_string (current_dir, Vfile_name_coding_system, Qt); | |
1492 | ||
e98d950b | 1493 | #ifndef WINDOWSNT |
d0d6b7c5 JB |
1494 | pid = vfork (); |
1495 | if (pid == 0) | |
e98d950b | 1496 | #endif /* not WINDOWSNT */ |
d0d6b7c5 JB |
1497 | { |
1498 | int xforkin = forkin; | |
1499 | int xforkout = forkout; | |
1500 | ||
1501 | #if 0 /* This was probably a mistake--it duplicates code later on, | |
1502 | but fails to handle all the cases. */ | |
1503 | /* Make sure SIGCHLD is not blocked in the child. */ | |
1504 | sigsetmask (SIGEMPTYMASK); | |
1505 | #endif | |
1506 | ||
1507 | /* Make the pty be the controlling terminal of the process. */ | |
1508 | #ifdef HAVE_PTYS | |
1509 | /* First, disconnect its current controlling terminal. */ | |
1510 | #ifdef HAVE_SETSID | |
7ce48618 RS |
1511 | /* We tried doing setsid only if pty_flag, but it caused |
1512 | process_set_signal to fail on SGI when using a pipe. */ | |
1513 | setsid (); | |
ce4c9c90 | 1514 | /* Make the pty's terminal the controlling terminal. */ |
084fd64a | 1515 | if (pty_flag) |
39e9ebcd | 1516 | { |
39e9ebcd RS |
1517 | #ifdef TIOCSCTTY |
1518 | /* We ignore the return value | |
1519 | because faith@cs.unc.edu says that is necessary on Linux. */ | |
1520 | ioctl (xforkin, TIOCSCTTY, 0); | |
ce4c9c90 | 1521 | #endif |
39e9ebcd | 1522 | } |
d0d6b7c5 | 1523 | #else /* not HAVE_SETSID */ |
c14e53a4 | 1524 | #ifdef USG |
000ab717 | 1525 | /* It's very important to call setpgrp here and no time |
d0d6b7c5 JB |
1526 | afterwards. Otherwise, we lose our controlling tty which |
1527 | is set when we open the pty. */ | |
1528 | setpgrp (); | |
1529 | #endif /* USG */ | |
1530 | #endif /* not HAVE_SETSID */ | |
9bcf8ec6 KH |
1531 | #if defined (HAVE_TERMIOS) && defined (LDISC1) |
1532 | if (pty_flag && xforkin >= 0) | |
1533 | { | |
1534 | struct termios t; | |
1535 | tcgetattr (xforkin, &t); | |
1536 | t.c_lflag = LDISC1; | |
1537 | if (tcsetattr (xforkin, TCSANOW, &t) < 0) | |
1538 | write (1, "create_process/tcsetattr LDISC1 failed\n", 39); | |
1539 | } | |
1540 | #else | |
aafadd9f | 1541 | #if defined (NTTYDISC) && defined (TIOCSETD) |
ff773a4e | 1542 | if (pty_flag && xforkin >= 0) |
afc549fd RS |
1543 | { |
1544 | /* Use new line discipline. */ | |
1545 | int ldisc = NTTYDISC; | |
4458f555 | 1546 | ioctl (xforkin, TIOCSETD, &ldisc); |
afc549fd | 1547 | } |
000ab717 | 1548 | #endif |
9bcf8ec6 | 1549 | #endif |
d0d6b7c5 JB |
1550 | #ifdef TIOCNOTTY |
1551 | /* In 4.3BSD, the TIOCSPGRP bug has been fixed, and now you | |
1552 | can do TIOCSPGRP only to the process's controlling tty. */ | |
1553 | if (pty_flag) | |
1554 | { | |
1555 | /* I wonder: would just ioctl (0, TIOCNOTTY, 0) work here? | |
1556 | I can't test it since I don't have 4.3. */ | |
1557 | int j = open ("/dev/tty", O_RDWR, 0); | |
1558 | ioctl (j, TIOCNOTTY, 0); | |
1559 | close (j); | |
5a570e37 | 1560 | #ifndef USG |
d0d6b7c5 JB |
1561 | /* In order to get a controlling terminal on some versions |
1562 | of BSD, it is necessary to put the process in pgrp 0 | |
1563 | before it opens the terminal. */ | |
99c1aeca | 1564 | #ifdef HAVE_SETPGID |
3ea1d291 RS |
1565 | setpgid (0, 0); |
1566 | #else | |
d0d6b7c5 | 1567 | setpgrp (0, 0); |
3ea1d291 | 1568 | #endif |
d0d6b7c5 JB |
1569 | #endif |
1570 | } | |
1571 | #endif /* TIOCNOTTY */ | |
1572 | ||
99153b9e | 1573 | #if !defined (RTU) && !defined (UNIPLUS) && !defined (DONT_REOPEN_PTY) |
d0d6b7c5 | 1574 | /*** There is a suggestion that this ought to be a |
99153b9e RS |
1575 | conditional on TIOCSPGRP, |
1576 | or !(defined (HAVE_SETSID) && defined (TIOCSCTTY)). | |
1577 | Trying the latter gave the wrong results on Debian GNU/Linux 1.1; | |
1578 | that system does seem to need this code, even though | |
1579 | both HAVE_SETSID and TIOCSCTTY are defined. */ | |
d0d6b7c5 JB |
1580 | /* Now close the pty (if we had it open) and reopen it. |
1581 | This makes the pty the controlling terminal of the subprocess. */ | |
1582 | if (pty_flag) | |
1583 | { | |
99e3d726 RS |
1584 | #ifdef SET_CHILD_PTY_PGRP |
1585 | int pgrp = getpid (); | |
1586 | #endif | |
1587 | ||
d0d6b7c5 JB |
1588 | /* I wonder if close (open (pty_name, ...)) would work? */ |
1589 | if (xforkin >= 0) | |
1590 | close (xforkin); | |
1591 | xforkout = xforkin = open (pty_name, O_RDWR, 0); | |
1592 | ||
4aa54ba8 RS |
1593 | if (xforkin < 0) |
1594 | { | |
1595 | write (1, "Couldn't open the pty terminal ", 31); | |
1596 | write (1, pty_name, strlen (pty_name)); | |
1597 | write (1, "\n", 1); | |
1598 | _exit (1); | |
1599 | } | |
1600 | ||
99e3d726 RS |
1601 | #ifdef SET_CHILD_PTY_PGRP |
1602 | ioctl (xforkin, TIOCSPGRP, &pgrp); | |
1603 | ioctl (xforkout, TIOCSPGRP, &pgrp); | |
1604 | #endif | |
d0d6b7c5 | 1605 | } |
99153b9e | 1606 | #endif /* not UNIPLUS and not RTU and not DONT_REOPEN_PTY */ |
e9bf058b | 1607 | |
d0d6b7c5 | 1608 | #ifdef SETUP_SLAVE_PTY |
13a72104 RS |
1609 | if (pty_flag) |
1610 | { | |
1611 | SETUP_SLAVE_PTY; | |
1612 | } | |
d0d6b7c5 JB |
1613 | #endif /* SETUP_SLAVE_PTY */ |
1614 | #ifdef AIX | |
1615 | /* On AIX, we've disabled SIGHUP above once we start a child on a pty. | |
1616 | Now reenable it in the child, so it will die when we want it to. */ | |
1617 | if (pty_flag) | |
1618 | signal (SIGHUP, SIG_DFL); | |
1619 | #endif | |
1620 | #endif /* HAVE_PTYS */ | |
1621 | ||
0dc70c33 KH |
1622 | signal (SIGINT, SIG_DFL); |
1623 | signal (SIGQUIT, SIG_DFL); | |
1624 | ||
1625 | /* Stop blocking signals in the child. */ | |
1626 | #ifdef POSIX_SIGNALS | |
1627 | sigprocmask (SIG_SETMASK, &procmask, 0); | |
1628 | #else /* !POSIX_SIGNALS */ | |
d0d6b7c5 JB |
1629 | #ifdef SIGCHLD |
1630 | #ifdef BSD4_1 | |
1631 | sigrelse (SIGCHLD); | |
1632 | #else /* not BSD4_1 */ | |
6df54671 | 1633 | #if defined (BSD_SYSTEM) || defined (UNIPLUS) || defined (HPUX) |
d0d6b7c5 JB |
1634 | sigsetmask (SIGEMPTYMASK); |
1635 | #else /* ordinary USG */ | |
63528b78 | 1636 | #if 0 |
d0d6b7c5 | 1637 | signal (SIGCHLD, sigchld); |
63528b78 | 1638 | #endif |
d0d6b7c5 JB |
1639 | #endif /* ordinary USG */ |
1640 | #endif /* not BSD4_1 */ | |
1641 | #endif /* SIGCHLD */ | |
0dc70c33 | 1642 | #endif /* !POSIX_SIGNALS */ |
5e7e1da2 | 1643 | |
ab01d0a8 RS |
1644 | if (pty_flag) |
1645 | child_setup_tty (xforkout); | |
e98d950b RS |
1646 | #ifdef WINDOWSNT |
1647 | pid = child_setup (xforkin, xforkout, xforkout, | |
1648 | new_argv, 1, current_dir); | |
1649 | #else /* not WINDOWSNT */ | |
d0d6b7c5 | 1650 | child_setup (xforkin, xforkout, xforkout, |
e065a56e | 1651 | new_argv, 1, current_dir); |
e98d950b | 1652 | #endif /* not WINDOWSNT */ |
d0d6b7c5 JB |
1653 | } |
1654 | environ = save_environ; | |
1655 | } | |
1656 | ||
ececcbec RS |
1657 | UNBLOCK_INPUT; |
1658 | ||
4a127b3b | 1659 | /* This runs in the Emacs process. */ |
d0d6b7c5 | 1660 | if (pid < 0) |
6311cf58 RS |
1661 | { |
1662 | if (forkin >= 0) | |
1663 | close (forkin); | |
1664 | if (forkin != forkout && forkout >= 0) | |
1665 | close (forkout); | |
6311cf58 | 1666 | } |
4a127b3b KH |
1667 | else |
1668 | { | |
1669 | /* vfork succeeded. */ | |
1670 | XSETFASTINT (XPROCESS (process)->pid, pid); | |
d0d6b7c5 | 1671 | |
e98d950b | 1672 | #ifdef WINDOWSNT |
4a127b3b | 1673 | register_child (pid, inchannel); |
e98d950b RS |
1674 | #endif /* WINDOWSNT */ |
1675 | ||
4a127b3b KH |
1676 | /* If the subfork execv fails, and it exits, |
1677 | this close hangs. I don't know why. | |
1678 | So have an interrupt jar it loose. */ | |
1679 | stop_polling (); | |
1680 | signal (SIGALRM, create_process_1); | |
1681 | alarm (1); | |
1682 | XPROCESS (process)->subtty = Qnil; | |
1683 | if (forkin >= 0) | |
1684 | close (forkin); | |
1685 | alarm (0); | |
1686 | start_polling (); | |
1687 | if (forkin != forkout && forkout >= 0) | |
1688 | close (forkout); | |
d0d6b7c5 | 1689 | |
875e6b94 | 1690 | #ifdef HAVE_PTYS |
4a127b3b KH |
1691 | if (pty_flag) |
1692 | XPROCESS (process)->tty_name = build_string (pty_name); | |
1693 | else | |
875e6b94 | 1694 | #endif |
4a127b3b KH |
1695 | XPROCESS (process)->tty_name = Qnil; |
1696 | } | |
3b9a3dfa | 1697 | |
4a127b3b KH |
1698 | /* Restore the signal state whether vfork succeeded or not. |
1699 | (We will signal an error, below, if it failed.) */ | |
0dc70c33 KH |
1700 | #ifdef POSIX_SIGNALS |
1701 | #ifdef HAVE_VFORK | |
1702 | /* Restore the parent's signal handlers. */ | |
1703 | sigaction (SIGINT, &sigint_action, 0); | |
1704 | sigaction (SIGQUIT, &sigquit_action, 0); | |
1705 | #ifdef AIX | |
1706 | sigaction (SIGHUP, &sighup_action, 0); | |
1707 | #endif | |
1708 | #endif /* HAVE_VFORK */ | |
1709 | /* Stop blocking signals in the parent. */ | |
1710 | sigprocmask (SIG_SETMASK, &procmask, 0); | |
1711 | #else /* !POSIX_SIGNALS */ | |
d0d6b7c5 JB |
1712 | #ifdef SIGCHLD |
1713 | #ifdef BSD4_1 | |
1714 | sigrelse (SIGCHLD); | |
1715 | #else /* not BSD4_1 */ | |
6df54671 | 1716 | #if defined (BSD_SYSTEM) || defined (UNIPLUS) || defined (HPUX) |
d0d6b7c5 JB |
1717 | sigsetmask (SIGEMPTYMASK); |
1718 | #else /* ordinary USG */ | |
1719 | #if 0 | |
1720 | signal (SIGCHLD, sigchld); | |
1721 | /* Now really handle any of these signals | |
1722 | that came in during this function. */ | |
1723 | if (sigchld_deferred) | |
1724 | kill (getpid (), SIGCHLD); | |
1725 | #endif | |
1726 | #endif /* ordinary USG */ | |
1727 | #endif /* not BSD4_1 */ | |
1728 | #endif /* SIGCHLD */ | |
0dc70c33 | 1729 | #endif /* !POSIX_SIGNALS */ |
4a127b3b KH |
1730 | |
1731 | /* Now generate the error if vfork failed. */ | |
1732 | if (pid < 0) | |
1733 | report_file_error ("Doing vfork", Qnil); | |
d0d6b7c5 JB |
1734 | } |
1735 | #endif /* not VMS */ | |
1736 | ||
1737 | #ifdef HAVE_SOCKETS | |
1738 | ||
1739 | /* open a TCP network connection to a given HOST/SERVICE. Treated | |
1740 | exactly like a normal process when reading and writing. Only | |
1741 | differences are in status display and process deletion. A network | |
1742 | connection has no PID; you cannot signal it. All you can do is | |
1743 | deactivate and close it via delete-process */ | |
1744 | ||
1745 | DEFUN ("open-network-stream", Fopen_network_stream, Sopen_network_stream, | |
1746 | 4, 4, 0, | |
1747 | "Open a TCP connection for a service to a host.\n\ | |
1748 | Returns a subprocess-object to represent the connection.\n\ | |
1749 | Input and output work as for subprocesses; `delete-process' closes it.\n\ | |
1750 | Args are NAME BUFFER HOST SERVICE.\n\ | |
1751 | NAME is name for process. It is modified if necessary to make it unique.\n\ | |
1752 | BUFFER is the buffer (or buffer-name) to associate with the process.\n\ | |
1753 | Process output goes at end of that buffer, unless you specify\n\ | |
1754 | an output stream or filter function to handle the output.\n\ | |
1755 | BUFFER may be also nil, meaning that this process is not associated\n\ | |
1756 | with any buffer\n\ | |
1757 | Third arg is name of the host to connect to, or its IP address.\n\ | |
1758 | Fourth arg SERVICE is name of the service desired, or an integer\n\ | |
1759 | specifying a port number to connect to.") | |
1760 | (name, buffer, host, service) | |
1761 | Lisp_Object name, buffer, host, service; | |
1762 | { | |
1763 | Lisp_Object proc; | |
1764 | register int i; | |
1765 | struct sockaddr_in address; | |
1766 | struct servent *svc_info; | |
1767 | struct hostent *host_info_ptr, host_info; | |
1768 | char *(addr_list[2]); | |
79967d5e | 1769 | IN_ADDR numeric_addr; |
d0d6b7c5 JB |
1770 | int s, outch, inch; |
1771 | char errstring[80]; | |
1772 | int port; | |
1773 | struct hostent host_info_fixed; | |
1774 | struct gcpro gcpro1, gcpro2, gcpro3, gcpro4; | |
e333e864 | 1775 | int retry = 0; |
44ade2e9 | 1776 | int count = specpdl_ptr - specpdl; |
d0d6b7c5 | 1777 | |
bff3ed0a RS |
1778 | #ifdef WINDOWSNT |
1779 | /* Ensure socket support is loaded if available. */ | |
1780 | init_winsock (TRUE); | |
1781 | #endif | |
1782 | ||
d0d6b7c5 JB |
1783 | GCPRO4 (name, buffer, host, service); |
1784 | CHECK_STRING (name, 0); | |
1785 | CHECK_STRING (host, 0); | |
bcd69aea | 1786 | if (INTEGERP (service)) |
d0d6b7c5 JB |
1787 | port = htons ((unsigned short) XINT (service)); |
1788 | else | |
1789 | { | |
1790 | CHECK_STRING (service, 0); | |
1791 | svc_info = getservbyname (XSTRING (service)->data, "tcp"); | |
1792 | if (svc_info == 0) | |
1793 | error ("Unknown service \"%s\"", XSTRING (service)->data); | |
1794 | port = svc_info->s_port; | |
1795 | } | |
1796 | ||
798b64bb KH |
1797 | /* Slow down polling to every ten seconds. |
1798 | Some kernels have a bug which causes retrying connect to fail | |
1799 | after a connect. Polling can interfere with gethostbyname too. */ | |
1800 | #ifdef POLL_FOR_INPUT | |
1801 | bind_polling_period (10); | |
1802 | #endif | |
1803 | ||
1d2c16fa | 1804 | #ifndef TERM |
616da37c RS |
1805 | while (1) |
1806 | { | |
5f0929a7 RS |
1807 | #ifdef TRY_AGAIN |
1808 | h_errno = 0; | |
1809 | #endif | |
5d6c2aa3 RS |
1810 | immediate_quit = 1; |
1811 | QUIT; | |
616da37c | 1812 | host_info_ptr = gethostbyname (XSTRING (host)->data); |
5d6c2aa3 | 1813 | immediate_quit = 0; |
616da37c RS |
1814 | #ifdef TRY_AGAIN |
1815 | if (! (host_info_ptr == 0 && h_errno == TRY_AGAIN)) | |
1816 | #endif | |
1817 | break; | |
1818 | Fsleep_for (make_number (1), Qnil); | |
1819 | } | |
d0d6b7c5 JB |
1820 | if (host_info_ptr == 0) |
1821 | /* Attempt to interpret host as numeric inet address */ | |
1822 | { | |
393a9679 | 1823 | numeric_addr = inet_addr ((char *) XSTRING (host)->data); |
79967d5e | 1824 | if (NUMERIC_ADDR_ERROR) |
d0d6b7c5 JB |
1825 | error ("Unknown host \"%s\"", XSTRING (host)->data); |
1826 | ||
1827 | host_info_ptr = &host_info; | |
1828 | host_info.h_name = 0; | |
1829 | host_info.h_aliases = 0; | |
1830 | host_info.h_addrtype = AF_INET; | |
39a21be6 JB |
1831 | #ifdef h_addr |
1832 | /* Older machines have only one address slot called h_addr. | |
1833 | Newer machines have h_addr_list, but #define h_addr to | |
1834 | be its first element. */ | |
1835 | host_info.h_addr_list = &(addr_list[0]); | |
1836 | #endif | |
1837 | host_info.h_addr = (char*)(&numeric_addr); | |
d0d6b7c5 | 1838 | addr_list[1] = 0; |
8777fbe2 RS |
1839 | /* numeric_addr isn't null-terminated; it has fixed length. */ |
1840 | host_info.h_length = sizeof (numeric_addr); | |
d0d6b7c5 JB |
1841 | } |
1842 | ||
1843 | bzero (&address, sizeof address); | |
1844 | bcopy (host_info_ptr->h_addr, (char *) &address.sin_addr, | |
1845 | host_info_ptr->h_length); | |
1846 | address.sin_family = host_info_ptr->h_addrtype; | |
1847 | address.sin_port = port; | |
1848 | ||
1849 | s = socket (host_info_ptr->h_addrtype, SOCK_STREAM, 0); | |
1850 | if (s < 0) | |
1851 | report_file_error ("error creating socket", Fcons (name, Qnil)); | |
1852 | ||
457a9bee RS |
1853 | /* Kernel bugs (on Ultrix at least) cause lossage (not just EINTR) |
1854 | when connect is interrupted. So let's not let it get interrupted. | |
1855 | Note we do not turn off polling, because polling is only used | |
1856 | when not interrupt_input, and thus not normally used on the systems | |
1857 | which have this bug. On systems which use polling, there's no way | |
1858 | to quit if polling is turned off. */ | |
1859 | if (interrupt_input) | |
1860 | unrequest_sigio (); | |
1861 | ||
d0d6b7c5 | 1862 | loop: |
0f2ee0c1 RS |
1863 | |
1864 | immediate_quit = 1; | |
1865 | QUIT; | |
1866 | ||
e333e864 RS |
1867 | if (connect (s, (struct sockaddr *) &address, sizeof address) == -1 |
1868 | && errno != EISCONN) | |
d0d6b7c5 JB |
1869 | { |
1870 | int xerrno = errno; | |
e333e864 | 1871 | |
0f2ee0c1 RS |
1872 | immediate_quit = 0; |
1873 | ||
d0d6b7c5 JB |
1874 | if (errno == EINTR) |
1875 | goto loop; | |
e333e864 RS |
1876 | if (errno == EADDRINUSE && retry < 20) |
1877 | { | |
4590788a RS |
1878 | /* A delay here is needed on some FreeBSD systems, |
1879 | and it is harmless, since this retrying takes time anyway | |
1880 | and should be infrequent. */ | |
1881 | Fsleep_for (make_number (1), Qnil); | |
e333e864 RS |
1882 | retry++; |
1883 | goto loop; | |
1884 | } | |
1885 | ||
d0d6b7c5 | 1886 | close (s); |
457a9bee RS |
1887 | |
1888 | if (interrupt_input) | |
1889 | request_sigio (); | |
1890 | ||
d0d6b7c5 JB |
1891 | errno = xerrno; |
1892 | report_file_error ("connection failed", | |
1893 | Fcons (host, Fcons (name, Qnil))); | |
1894 | } | |
457a9bee | 1895 | |
0f2ee0c1 RS |
1896 | immediate_quit = 0; |
1897 | ||
44ade2e9 RS |
1898 | #ifdef POLL_FOR_INPUT |
1899 | unbind_to (count, Qnil); | |
1900 | #endif | |
1901 | ||
457a9bee RS |
1902 | if (interrupt_input) |
1903 | request_sigio (); | |
1904 | ||
1d2c16fa RS |
1905 | #else /* TERM */ |
1906 | s = connect_server (0); | |
1907 | if (s < 0) | |
1908 | report_file_error ("error creating socket", Fcons (name, Qnil)); | |
1909 | send_command (s, C_PORT, 0, "%s:%d", XSTRING (host)->data, ntohs (port)); | |
1910 | send_command (s, C_DUMB, 1, 0); | |
1911 | #endif /* TERM */ | |
d0d6b7c5 JB |
1912 | |
1913 | inch = s; | |
59f23005 | 1914 | outch = s; |
d0d6b7c5 JB |
1915 | |
1916 | if (!NILP (buffer)) | |
1917 | buffer = Fget_buffer_create (buffer); | |
1918 | proc = make_process (name); | |
1919 | ||
1920 | chan_process[inch] = proc; | |
1921 | ||
1922 | #ifdef O_NONBLOCK | |
1923 | fcntl (inch, F_SETFL, O_NONBLOCK); | |
1924 | #else | |
1925 | #ifdef O_NDELAY | |
1926 | fcntl (inch, F_SETFL, O_NDELAY); | |
1927 | #endif | |
1928 | #endif | |
1929 | ||
de282a05 | 1930 | XPROCESS (proc)->childp = Fcons (host, Fcons (service, Qnil)); |
d0d6b7c5 JB |
1931 | XPROCESS (proc)->command_channel_p = Qnil; |
1932 | XPROCESS (proc)->buffer = buffer; | |
1933 | XPROCESS (proc)->sentinel = Qnil; | |
1934 | XPROCESS (proc)->filter = Qnil; | |
1935 | XPROCESS (proc)->command = Qnil; | |
1936 | XPROCESS (proc)->pid = Qnil; | |
7795ff9b | 1937 | XSETINT (XPROCESS (proc)->infd, inch); |
1d056e64 | 1938 | XSETINT (XPROCESS (proc)->outfd, outch); |
d0d6b7c5 JB |
1939 | XPROCESS (proc)->status = Qrun; |
1940 | FD_SET (inch, &input_wait_mask); | |
a69281ff | 1941 | FD_SET (inch, &non_keyboard_wait_mask); |
7d0e672e RS |
1942 | if (inch > max_process_desc) |
1943 | max_process_desc = inch; | |
d0d6b7c5 | 1944 | |
c7580538 KH |
1945 | if (!NILP (buffer) && NILP (XBUFFER (buffer)->enable_multibyte_characters) |
1946 | || NILP (buffer) && NILP (buffer_defaults.enable_multibyte_characters)) | |
1947 | { | |
1948 | XPROCESS (proc)->decode_coding_system = Qnil; | |
1949 | XPROCESS (proc)->encode_coding_system = Qnil; | |
1950 | } | |
1951 | else | |
1952 | { | |
1953 | /* Setup coding systems for communicating with the network stream. */ | |
1954 | struct gcpro gcpro1; | |
715f7577 | 1955 | /* Qt denotes we have not yet called Ffind_operation_coding_system. */ |
c7580538 KH |
1956 | Lisp_Object coding_systems = Qt; |
1957 | Lisp_Object args[5], val; | |
0fa1789e | 1958 | |
11f84d7d KH |
1959 | if (!NILP (Vcoding_system_for_read)) |
1960 | val = Vcoding_system_for_read; | |
1961 | else if (NILP (current_buffer->enable_multibyte_characters)) | |
1962 | /* We dare not decode end-of-line format by setting VAL to | |
e7fbaa65 | 1963 | Qraw_text, because the existing Emacs Lisp libraries |
11f84d7d KH |
1964 | assume that they receive bare code including a sequene of |
1965 | CR LF. */ | |
1966 | val = Qnil; | |
1967 | else | |
c7580538 KH |
1968 | { |
1969 | args[0] = Qopen_network_stream, args[1] = name, | |
1970 | args[2] = buffer, args[3] = host, args[4] = service; | |
1971 | GCPRO1 (proc); | |
715f7577 | 1972 | coding_systems = Ffind_operation_coding_system (5, args); |
c7580538 | 1973 | UNGCPRO; |
83502605 KH |
1974 | if (CONSP (coding_systems)) |
1975 | val = XCONS (coding_systems)->car; | |
1976 | else if (CONSP (Vdefault_process_coding_system)) | |
1977 | val = XCONS (Vdefault_process_coding_system)->car; | |
11f84d7d KH |
1978 | else |
1979 | val = Qnil; | |
c7580538 KH |
1980 | } |
1981 | XPROCESS (proc)->decode_coding_system = val; | |
0fa1789e | 1982 | |
11f84d7d KH |
1983 | if (!NILP (Vcoding_system_for_write)) |
1984 | val = Vcoding_system_for_write; | |
1985 | else if (NILP (current_buffer->enable_multibyte_characters)) | |
1986 | val = Qnil; | |
1987 | else | |
c7580538 KH |
1988 | { |
1989 | if (EQ (coding_systems, Qt)) | |
1990 | { | |
1991 | args[0] = Qopen_network_stream, args[1] = name, | |
1992 | args[2] = buffer, args[3] = host, args[4] = service; | |
1993 | GCPRO1 (proc); | |
715f7577 | 1994 | coding_systems = Ffind_operation_coding_system (5, args); |
c7580538 KH |
1995 | UNGCPRO; |
1996 | } | |
83502605 KH |
1997 | if (CONSP (coding_systems)) |
1998 | val = XCONS (coding_systems)->cdr; | |
1999 | else if (CONSP (Vdefault_process_coding_system)) | |
2000 | val = XCONS (Vdefault_process_coding_system)->cdr; | |
11f84d7d KH |
2001 | else |
2002 | val = Qnil; | |
c7580538 KH |
2003 | } |
2004 | XPROCESS (proc)->encode_coding_system = val; | |
2005 | } | |
0fa1789e | 2006 | |
c7580538 KH |
2007 | if (!proc_decode_coding_system[inch]) |
2008 | proc_decode_coding_system[inch] | |
2009 | = (struct coding_system *) xmalloc (sizeof (struct coding_system)); | |
0fa1789e | 2010 | setup_coding_system (XPROCESS (proc)->decode_coding_system, |
c7580538 KH |
2011 | proc_decode_coding_system[inch]); |
2012 | if (!proc_encode_coding_system[outch]) | |
2013 | proc_encode_coding_system[outch] | |
2014 | = (struct coding_system *) xmalloc (sizeof (struct coding_system)); | |
0fa1789e | 2015 | setup_coding_system (XPROCESS (proc)->encode_coding_system, |
c7580538 | 2016 | proc_encode_coding_system[outch]); |
0fa1789e KH |
2017 | |
2018 | XPROCESS (proc)->decoding_buf = make_uninit_string (0); | |
e7fbaa65 | 2019 | XPROCESS (proc)->decoding_carryover = make_number (0); |
0fa1789e | 2020 | XPROCESS (proc)->encoding_buf = make_uninit_string (0); |
e7fbaa65 | 2021 | XPROCESS (proc)->encoding_carryover = make_number (0); |
0fa1789e | 2022 | |
d0d6b7c5 JB |
2023 | UNGCPRO; |
2024 | return proc; | |
2025 | } | |
2026 | #endif /* HAVE_SOCKETS */ | |
2027 | ||
6b53bb85 | 2028 | void |
d0d6b7c5 JB |
2029 | deactivate_process (proc) |
2030 | Lisp_Object proc; | |
2031 | { | |
2032 | register int inchannel, outchannel; | |
2033 | register struct Lisp_Process *p = XPROCESS (proc); | |
2034 | ||
a9f2c884 RS |
2035 | inchannel = XINT (p->infd); |
2036 | outchannel = XINT (p->outfd); | |
d0d6b7c5 | 2037 | |
a9f2c884 | 2038 | if (inchannel >= 0) |
d0d6b7c5 JB |
2039 | { |
2040 | /* Beware SIGCHLD hereabouts. */ | |
2041 | flush_pending_output (inchannel); | |
2042 | #ifdef VMS | |
2043 | { | |
2044 | VMS_PROC_STUFF *get_vms_process_pointer (), *vs; | |
2045 | sys$dassgn (outchannel); | |
c6c6865d | 2046 | vs = get_vms_process_pointer (p->pid); |
d0d6b7c5 JB |
2047 | if (vs) |
2048 | give_back_vms_process_stuff (vs); | |
2049 | } | |
2050 | #else | |
2051 | close (inchannel); | |
a9f2c884 | 2052 | if (outchannel >= 0 && outchannel != inchannel) |
d0d6b7c5 JB |
2053 | close (outchannel); |
2054 | #endif | |
2055 | ||
1d056e64 KH |
2056 | XSETINT (p->infd, -1); |
2057 | XSETINT (p->outfd, -1); | |
d0d6b7c5 JB |
2058 | chan_process[inchannel] = Qnil; |
2059 | FD_CLR (inchannel, &input_wait_mask); | |
a69281ff | 2060 | FD_CLR (inchannel, &non_keyboard_wait_mask); |
7d0e672e RS |
2061 | if (inchannel == max_process_desc) |
2062 | { | |
2063 | int i; | |
2064 | /* We just closed the highest-numbered process input descriptor, | |
2065 | so recompute the highest-numbered one now. */ | |
2066 | max_process_desc = 0; | |
2067 | for (i = 0; i < MAXDESC; i++) | |
2068 | if (!NILP (chan_process[i])) | |
2069 | max_process_desc = i; | |
2070 | } | |
d0d6b7c5 JB |
2071 | } |
2072 | } | |
2073 | ||
2074 | /* Close all descriptors currently in use for communication | |
2075 | with subprocess. This is used in a newly-forked subprocess | |
2076 | to get rid of irrelevant descriptors. */ | |
2077 | ||
6b53bb85 | 2078 | void |
d0d6b7c5 JB |
2079 | close_process_descs () |
2080 | { | |
e98d950b | 2081 | #ifndef WINDOWSNT |
d0d6b7c5 JB |
2082 | int i; |
2083 | for (i = 0; i < MAXDESC; i++) | |
2084 | { | |
2085 | Lisp_Object process; | |
2086 | process = chan_process[i]; | |
2087 | if (!NILP (process)) | |
2088 | { | |
a9f2c884 RS |
2089 | int in = XINT (XPROCESS (process)->infd); |
2090 | int out = XINT (XPROCESS (process)->outfd); | |
2091 | if (in >= 0) | |
d0d6b7c5 | 2092 | close (in); |
a9f2c884 | 2093 | if (out >= 0 && in != out) |
d0d6b7c5 JB |
2094 | close (out); |
2095 | } | |
2096 | } | |
e98d950b | 2097 | #endif |
d0d6b7c5 JB |
2098 | } |
2099 | \f | |
2100 | DEFUN ("accept-process-output", Faccept_process_output, Saccept_process_output, | |
2101 | 0, 3, 0, | |
2102 | "Allow any pending output from subprocesses to be read by Emacs.\n\ | |
2103 | It is read into the process' buffers or given to their filter functions.\n\ | |
2104 | Non-nil arg PROCESS means do not return until some output has been received\n\ | |
2105 | from PROCESS.\n\ | |
2106 | Non-nil second arg TIMEOUT and third arg TIMEOUT-MSECS are number of\n\ | |
2107 | seconds and microseconds to wait; return after that much time whether\n\ | |
2108 | or not there is input.\n\ | |
2109 | Return non-nil iff we received any output before the timeout expired.") | |
4ee3e309 EN |
2110 | (process, timeout, timeout_msecs) |
2111 | register Lisp_Object process, timeout, timeout_msecs; | |
d0d6b7c5 JB |
2112 | { |
2113 | int seconds; | |
2114 | int useconds; | |
2115 | ||
2116 | if (! NILP (timeout_msecs)) | |
2117 | { | |
2118 | CHECK_NUMBER (timeout_msecs, 2); | |
2119 | useconds = XINT (timeout_msecs); | |
bcd69aea | 2120 | if (!INTEGERP (timeout)) |
1d056e64 | 2121 | XSETINT (timeout, 0); |
d0d6b7c5 JB |
2122 | |
2123 | { | |
2124 | int carry = useconds / 1000000; | |
2125 | ||
2126 | XSETINT (timeout, XINT (timeout) + carry); | |
2127 | useconds -= carry * 1000000; | |
2128 | ||
2129 | /* I think this clause is necessary because C doesn't | |
2130 | guarantee a particular rounding direction for negative | |
2131 | integers. */ | |
2132 | if (useconds < 0) | |
2133 | { | |
2134 | XSETINT (timeout, XINT (timeout) - 1); | |
2135 | useconds += 1000000; | |
2136 | } | |
2137 | } | |
2138 | } | |
de946e5a RS |
2139 | else |
2140 | useconds = 0; | |
d0d6b7c5 JB |
2141 | |
2142 | if (! NILP (timeout)) | |
2143 | { | |
2144 | CHECK_NUMBER (timeout, 1); | |
2145 | seconds = XINT (timeout); | |
ada9a4fd | 2146 | if (seconds < 0 || (seconds == 0 && useconds == 0)) |
d0d6b7c5 JB |
2147 | seconds = -1; |
2148 | } | |
2149 | else | |
2150 | { | |
4ee3e309 | 2151 | if (NILP (process)) |
d0d6b7c5 JB |
2152 | seconds = -1; |
2153 | else | |
2154 | seconds = 0; | |
2155 | } | |
2156 | ||
4ee3e309 EN |
2157 | if (NILP (process)) |
2158 | XSETFASTINT (process, 0); | |
f76475ad | 2159 | |
d0d6b7c5 | 2160 | return |
4ee3e309 | 2161 | (wait_reading_process_input (seconds, useconds, process, 0) |
d0d6b7c5 JB |
2162 | ? Qt : Qnil); |
2163 | } | |
2164 | ||
2165 | /* This variable is different from waiting_for_input in keyboard.c. | |
2166 | It is used to communicate to a lisp process-filter/sentinel (via the | |
2167 | function Fwaiting_for_user_input_p below) whether emacs was waiting | |
2168 | for user-input when that process-filter was called. | |
2169 | waiting_for_input cannot be used as that is by definition 0 when | |
d430ee71 RS |
2170 | lisp code is being evalled. |
2171 | This is also used in record_asynch_buffer_change. | |
2172 | For that purpose, this must be 0 | |
2173 | when not inside wait_reading_process_input. */ | |
d0d6b7c5 JB |
2174 | static int waiting_for_user_input_p; |
2175 | ||
c573ae8e RS |
2176 | /* This is here so breakpoints can be put on it. */ |
2177 | static | |
2178 | wait_reading_process_input_1 () | |
2179 | { | |
2180 | } | |
2181 | ||
d0d6b7c5 JB |
2182 | /* Read and dispose of subprocess output while waiting for timeout to |
2183 | elapse and/or keyboard input to be available. | |
2184 | ||
de6fd4b9 | 2185 | TIME_LIMIT is: |
d0d6b7c5 JB |
2186 | timeout in seconds, or |
2187 | zero for no limit, or | |
2188 | -1 means gobble data immediately available but don't wait for any. | |
2189 | ||
de6fd4b9 RS |
2190 | MICROSECS is: |
2191 | an additional duration to wait, measured in microseconds. | |
2192 | If this is nonzero and time_limit is 0, then the timeout | |
2193 | consists of MICROSECS only. | |
6e4f3667 | 2194 | |
de6fd4b9 | 2195 | READ_KBD is a lisp value: |
d0d6b7c5 JB |
2196 | 0 to ignore keyboard input, or |
2197 | 1 to return when input is available, or | |
84aa3ace | 2198 | -1 meaning caller will actually read the input, so don't throw to |
d0d6b7c5 | 2199 | the quit handler, or |
e6194ffc | 2200 | a cons cell, meaning wait until its car is non-nil |
de6fd4b9 | 2201 | (and gobble terminal input into the buffer if any arrives), or |
f76475ad JB |
2202 | a process object, meaning wait until something arrives from that |
2203 | process. The return value is true iff we read some input from | |
2204 | that process. | |
d0d6b7c5 | 2205 | |
de6fd4b9 | 2206 | DO_DISPLAY != 0 means redisplay should be done to show subprocess |
d0d6b7c5 JB |
2207 | output that arrives. |
2208 | ||
de6fd4b9 | 2209 | If READ_KBD is a pointer to a struct Lisp_Process, then the |
d0d6b7c5 JB |
2210 | function returns true iff we received input from that process |
2211 | before the timeout elapsed. | |
eb8c3be9 | 2212 | Otherwise, return true iff we received input from any process. */ |
d0d6b7c5 JB |
2213 | |
2214 | wait_reading_process_input (time_limit, microsecs, read_kbd, do_display) | |
f76475ad JB |
2215 | int time_limit, microsecs; |
2216 | Lisp_Object read_kbd; | |
2217 | int do_display; | |
d0d6b7c5 JB |
2218 | { |
2219 | register int channel, nfds, m; | |
2220 | static SELECT_TYPE Available; | |
2221 | int xerrno; | |
2222 | Lisp_Object proc; | |
2223 | EMACS_TIME timeout, end_time, garbage; | |
2224 | SELECT_TYPE Atemp; | |
a9f2c884 | 2225 | int wait_channel = -1; |
d0d6b7c5 JB |
2226 | struct Lisp_Process *wait_proc = 0; |
2227 | int got_some_input = 0; | |
84aa3ace | 2228 | Lisp_Object *wait_for_cell = 0; |
d0d6b7c5 JB |
2229 | |
2230 | FD_ZERO (&Available); | |
2231 | ||
f76475ad JB |
2232 | /* If read_kbd is a process to watch, set wait_proc and wait_channel |
2233 | accordingly. */ | |
bcd69aea | 2234 | if (PROCESSP (read_kbd)) |
d0d6b7c5 | 2235 | { |
f76475ad | 2236 | wait_proc = XPROCESS (read_kbd); |
a9f2c884 | 2237 | wait_channel = XINT (wait_proc->infd); |
22719df2 | 2238 | XSETFASTINT (read_kbd, 0); |
d0d6b7c5 JB |
2239 | } |
2240 | ||
84aa3ace | 2241 | /* If waiting for non-nil in a cell, record where. */ |
bcd69aea | 2242 | if (CONSP (read_kbd)) |
84aa3ace RS |
2243 | { |
2244 | wait_for_cell = &XCONS (read_kbd)->car; | |
22719df2 | 2245 | XSETFASTINT (read_kbd, 0); |
84aa3ace RS |
2246 | } |
2247 | ||
f76475ad | 2248 | waiting_for_user_input_p = XINT (read_kbd); |
d0d6b7c5 JB |
2249 | |
2250 | /* Since we may need to wait several times, | |
2251 | compute the absolute time to return at. */ | |
2252 | if (time_limit || microsecs) | |
2253 | { | |
2254 | EMACS_GET_TIME (end_time); | |
2255 | EMACS_SET_SECS_USECS (timeout, time_limit, microsecs); | |
2256 | EMACS_ADD_TIME (end_time, end_time, timeout); | |
2257 | } | |
e07d5449 KH |
2258 | #ifdef hpux |
2259 | /* AlainF 5-Jul-1996 | |
2260 | HP-UX 10.10 seem to have problems with signals coming in | |
2261 | Causes "poll: interrupted system call" messages when Emacs is run | |
2262 | in an X window | |
2263 | Turn off periodic alarms (in case they are in use) */ | |
2264 | stop_polling (); | |
2265 | #endif | |
d0d6b7c5 | 2266 | |
d0d6b7c5 JB |
2267 | while (1) |
2268 | { | |
c0239a0b RS |
2269 | int timeout_reduced_for_timers = 0; |
2270 | ||
d0d6b7c5 JB |
2271 | /* If calling from keyboard input, do not quit |
2272 | since we want to return C-g as an input character. | |
2273 | Otherwise, do pending quit if requested. */ | |
f76475ad | 2274 | if (XINT (read_kbd) >= 0) |
d0d6b7c5 JB |
2275 | QUIT; |
2276 | ||
889255b4 RS |
2277 | /* Exit now if the cell we're waiting for became non-nil. */ |
2278 | if (wait_for_cell && ! NILP (*wait_for_cell)) | |
2279 | break; | |
2280 | ||
d0d6b7c5 JB |
2281 | /* Compute time from now till when time limit is up */ |
2282 | /* Exit if already run out */ | |
2283 | if (time_limit == -1) | |
2284 | { | |
2285 | /* -1 specified for timeout means | |
2286 | gobble output available now | |
2287 | but don't wait at all. */ | |
2288 | ||
2289 | EMACS_SET_SECS_USECS (timeout, 0, 0); | |
2290 | } | |
2291 | else if (time_limit || microsecs) | |
2292 | { | |
2293 | EMACS_GET_TIME (timeout); | |
2294 | EMACS_SUB_TIME (timeout, end_time, timeout); | |
2295 | if (EMACS_TIME_NEG_P (timeout)) | |
2296 | break; | |
2297 | } | |
2298 | else | |
2299 | { | |
2300 | EMACS_SET_SECS_USECS (timeout, 100000, 0); | |
2301 | } | |
2302 | ||
f854a00b RS |
2303 | /* Normally we run timers here. |
2304 | But not if wait_for_cell; in those cases, | |
2305 | the wait is supposed to be short, | |
2306 | and those callers cannot handle running arbitrary Lisp code here. */ | |
2307 | if (! wait_for_cell) | |
fb4c3627 | 2308 | { |
c0239a0b | 2309 | EMACS_TIME timer_delay; |
c573ae8e RS |
2310 | int old_timers_run; |
2311 | ||
2312 | retry: | |
2313 | old_timers_run = timers_run; | |
c0239a0b | 2314 | timer_delay = timer_check (1); |
5de50bfb | 2315 | if (timers_run != old_timers_run && do_display) |
c573ae8e RS |
2316 | { |
2317 | redisplay_preserve_echo_area (); | |
2318 | /* We must retry, since a timer may have requeued itself | |
2319 | and that could alter the time_delay. */ | |
2320 | goto retry; | |
2321 | } | |
2322 | ||
69645afc RS |
2323 | /* If there is unread keyboard input, also return. */ |
2324 | if (XINT (read_kbd) != 0 | |
2325 | && requeued_events_pending_p ()) | |
2326 | break; | |
2327 | ||
c0239a0b | 2328 | if (! EMACS_TIME_NEG_P (timer_delay) && time_limit != -1) |
fb4c3627 RS |
2329 | { |
2330 | EMACS_TIME difference; | |
2331 | EMACS_SUB_TIME (difference, timer_delay, timeout); | |
2332 | if (EMACS_TIME_NEG_P (difference)) | |
c0239a0b RS |
2333 | { |
2334 | timeout = timer_delay; | |
2335 | timeout_reduced_for_timers = 1; | |
2336 | } | |
fb4c3627 | 2337 | } |
4abca5e7 RS |
2338 | /* If time_limit is -1, we are not going to wait at all. */ |
2339 | else if (time_limit != -1) | |
c573ae8e RS |
2340 | { |
2341 | /* This is so a breakpoint can be put here. */ | |
2342 | wait_reading_process_input_1 (); | |
2343 | } | |
fb4c3627 RS |
2344 | } |
2345 | ||
90ab1a81 JB |
2346 | /* Cause C-g and alarm signals to take immediate action, |
2347 | and cause input available signals to zero out timeout. | |
2348 | ||
2349 | It is important that we do this before checking for process | |
2350 | activity. If we get a SIGCHLD after the explicit checks for | |
2351 | process activity, timeout is the only way we will know. */ | |
2352 | if (XINT (read_kbd) < 0) | |
2353 | set_waiting_for_input (&timeout); | |
2354 | ||
6be429b1 JB |
2355 | /* If status of something has changed, and no input is |
2356 | available, notify the user of the change right away. After | |
2357 | this explicit check, we'll let the SIGCHLD handler zap | |
2358 | timeout to get our attention. */ | |
2359 | if (update_tick != process_tick && do_display) | |
2360 | { | |
2361 | Atemp = input_wait_mask; | |
2362 | EMACS_SET_SECS_USECS (timeout, 0, 0); | |
0c9960e9 RS |
2363 | if ((select (max (max_process_desc, max_keyboard_desc) + 1, |
2364 | &Atemp, (SELECT_TYPE *)0, (SELECT_TYPE *)0, | |
ecd1f654 KH |
2365 | &timeout) |
2366 | <= 0)) | |
90ab1a81 JB |
2367 | { |
2368 | /* It's okay for us to do this and then continue with | |
a0e4d3f3 | 2369 | the loop, since timeout has already been zeroed out. */ |
90ab1a81 JB |
2370 | clear_waiting_for_input (); |
2371 | status_notify (); | |
2372 | } | |
6be429b1 JB |
2373 | } |
2374 | ||
2375 | /* Don't wait for output from a non-running process. */ | |
2376 | if (wait_proc != 0 && !NILP (wait_proc->raw_status_low)) | |
2377 | update_status (wait_proc); | |
2378 | if (wait_proc != 0 | |
2379 | && ! EQ (wait_proc->status, Qrun)) | |
9aa2a7f4 | 2380 | { |
215b45e9 | 2381 | int nread, total_nread = 0; |
7ce63188 | 2382 | |
9aa2a7f4 | 2383 | clear_waiting_for_input (); |
7ce63188 RS |
2384 | XSETPROCESS (proc, wait_proc); |
2385 | ||
2386 | /* Read data from the process, until we exhaust it. */ | |
1c0707fd | 2387 | while (XINT (wait_proc->infd) >= 0 |
97a084c1 RS |
2388 | && (nread |
2389 | = read_process_output (proc, XINT (wait_proc->infd)))) | |
215b45e9 RS |
2390 | { |
2391 | if (0 < nread) | |
2392 | total_nread += nread; | |
2393 | #ifdef EIO | |
2394 | else if (nread == -1 && EIO == errno) | |
2395 | break; | |
2396 | #endif | |
2397 | } | |
7ce63188 RS |
2398 | if (total_nread > 0 && do_display) |
2399 | redisplay_preserve_echo_area (); | |
2400 | ||
9aa2a7f4 JB |
2401 | break; |
2402 | } | |
6be429b1 | 2403 | |
d0d6b7c5 JB |
2404 | /* Wait till there is something to do */ |
2405 | ||
b5dc1c83 RS |
2406 | if (wait_for_cell) |
2407 | Available = non_process_wait_mask; | |
2408 | else if (! XINT (read_kbd)) | |
a69281ff RS |
2409 | Available = non_keyboard_wait_mask; |
2410 | else | |
2411 | Available = input_wait_mask; | |
d0d6b7c5 | 2412 | |
ff11dfa1 | 2413 | /* If frame size has changed or the window is newly mapped, |
ffd56f97 JB |
2414 | redisplay now, before we start to wait. There is a race |
2415 | condition here; if a SIGIO arrives between now and the select | |
016899c0 JB |
2416 | and indicates that a frame is trashed, the select may block |
2417 | displaying a trashed screen. */ | |
5164ee8e | 2418 | if (frame_garbaged && do_display) |
7286affd RS |
2419 | { |
2420 | clear_waiting_for_input (); | |
2421 | redisplay_preserve_echo_area (); | |
2422 | if (XINT (read_kbd) < 0) | |
7efe788e | 2423 | set_waiting_for_input (&timeout); |
7286affd | 2424 | } |
ffd56f97 | 2425 | |
0a65b032 RS |
2426 | if (XINT (read_kbd) && detect_input_pending ()) |
2427 | { | |
2428 | nfds = 0; | |
2429 | FD_ZERO (&Available); | |
2430 | } | |
2431 | else | |
0c9960e9 RS |
2432 | nfds = select (max (max_process_desc, max_keyboard_desc) + 1, |
2433 | &Available, (SELECT_TYPE *)0, (SELECT_TYPE *)0, | |
0a65b032 | 2434 | &timeout); |
6720a7fb | 2435 | |
d0d6b7c5 JB |
2436 | xerrno = errno; |
2437 | ||
2438 | /* Make C-g and alarm signals set flags again */ | |
2439 | clear_waiting_for_input (); | |
2440 | ||
2441 | /* If we woke up due to SIGWINCH, actually change size now. */ | |
2442 | do_pending_window_change (); | |
2443 | ||
c0239a0b RS |
2444 | if (time_limit && nfds == 0 && ! timeout_reduced_for_timers) |
2445 | /* We wanted the full specified time, so return now. */ | |
d0d6b7c5 JB |
2446 | break; |
2447 | if (nfds < 0) | |
2448 | { | |
2449 | if (xerrno == EINTR) | |
2450 | FD_ZERO (&Available); | |
b0310da4 JB |
2451 | #ifdef ultrix |
2452 | /* Ultrix select seems to return ENOMEM when it is | |
2453 | interrupted. Treat it just like EINTR. Bleah. Note | |
2454 | that we want to test for the "ultrix" CPP symbol, not | |
2455 | "__ultrix__"; the latter is only defined under GCC, but | |
2456 | not by DEC's bundled CC. -JimB */ | |
8058415c JB |
2457 | else if (xerrno == ENOMEM) |
2458 | FD_ZERO (&Available); | |
2459 | #endif | |
d0d6b7c5 JB |
2460 | #ifdef ALLIANT |
2461 | /* This happens for no known reason on ALLIANT. | |
2462 | I am guessing that this is the right response. -- RMS. */ | |
2463 | else if (xerrno == EFAULT) | |
2464 | FD_ZERO (&Available); | |
2465 | #endif | |
2466 | else if (xerrno == EBADF) | |
2467 | { | |
2468 | #ifdef AIX | |
2469 | /* AIX doesn't handle PTY closure the same way BSD does. On AIX, | |
2470 | the child's closure of the pts gives the parent a SIGHUP, and | |
2471 | the ptc file descriptor is automatically closed, | |
2472 | yielding EBADF here or at select() call above. | |
2473 | So, SIGHUP is ignored (see def of PTY_TTY_NAME_SPRINTF | |
a0e4d3f3 | 2474 | in m/ibmrt-aix.h), and here we just ignore the select error. |
d0d6b7c5 | 2475 | Cleanup occurs c/o status_notify after SIGCLD. */ |
ffd56f97 | 2476 | FD_ZERO (&Available); /* Cannot depend on values returned */ |
d0d6b7c5 JB |
2477 | #else |
2478 | abort (); | |
2479 | #endif | |
2480 | } | |
2481 | else | |
6ed6233b | 2482 | error ("select error: %s", strerror (xerrno)); |
d0d6b7c5 | 2483 | } |
26ec91de | 2484 | #if defined(sun) && !defined(USG5_4) |
a69281ff | 2485 | else if (nfds > 0 && keyboard_bit_set (&Available) |
dd2281ae | 2486 | && interrupt_input) |
e0109153 JB |
2487 | /* System sometimes fails to deliver SIGIO. |
2488 | ||
2489 | David J. Mackenzie says that Emacs doesn't compile under | |
2490 | Solaris if this code is enabled, thus the USG5_4 in the CPP | |
2491 | conditional. "I haven't noticed any ill effects so far. | |
2492 | If you find a Solaris expert somewhere, they might know | |
2493 | better." */ | |
d0d6b7c5 JB |
2494 | kill (getpid (), SIGIO); |
2495 | #endif | |
2496 | ||
5d5beb62 RS |
2497 | #if 0 /* When polling is used, interrupt_input is 0, |
2498 | so get_input_pending should read the input. | |
2499 | So this should not be needed. */ | |
2500 | /* If we are using polling for input, | |
2501 | and we see input available, make it get read now. | |
2502 | Otherwise it might not actually get read for a second. | |
2503 | And on hpux, since we turn off polling in wait_reading_process_input, | |
2504 | it might never get read at all if we don't spend much time | |
2505 | outside of wait_reading_process_input. */ | |
2506 | if (XINT (read_kbd) && interrupt_input | |
2507 | && keyboard_bit_set (&Available) | |
2508 | && input_polling_used ()) | |
2509 | kill (getpid (), SIGALRM); | |
2510 | #endif | |
2511 | ||
d0d6b7c5 JB |
2512 | /* Check for keyboard input */ |
2513 | /* If there is any, return immediately | |
2514 | to give it higher priority than subprocesses */ | |
2515 | ||
77e1b3d4 | 2516 | if (XINT (read_kbd) != 0 |
5d6c2aa3 | 2517 | && detect_input_pending_run_timers (do_display)) |
6ed6233b KH |
2518 | { |
2519 | swallow_events (do_display); | |
5d6c2aa3 | 2520 | if (detect_input_pending_run_timers (do_display)) |
6ed6233b KH |
2521 | break; |
2522 | } | |
2523 | ||
69645afc RS |
2524 | /* If there is unread keyboard input, also return. */ |
2525 | if (XINT (read_kbd) != 0 | |
2526 | && requeued_events_pending_p ()) | |
2527 | break; | |
2528 | ||
77e1b3d4 RS |
2529 | /* If we are not checking for keyboard input now, |
2530 | do process events (but don't run any timers). | |
2531 | This is so that X events will be processed. | |
0c9960e9 | 2532 | Otherwise they may have to wait until polling takes place. |
77e1b3d4 RS |
2533 | That would causes delays in pasting selections, for example. |
2534 | ||
2535 | (We used to do this only if wait_for_cell.) */ | |
2536 | if (XINT (read_kbd) == 0 && detect_input_pending ()) | |
f854a00b RS |
2537 | { |
2538 | swallow_events (do_display); | |
0c9960e9 | 2539 | #if 0 /* Exiting when read_kbd doesn't request that seems wrong, though. */ |
f854a00b RS |
2540 | if (detect_input_pending ()) |
2541 | break; | |
5d5beb62 | 2542 | #endif |
0c9960e9 | 2543 | } |
f854a00b | 2544 | |
84aa3ace RS |
2545 | /* Exit now if the cell we're waiting for became non-nil. */ |
2546 | if (wait_for_cell && ! NILP (*wait_for_cell)) | |
2547 | break; | |
2548 | ||
4746118a | 2549 | #ifdef SIGIO |
5d5beb62 | 2550 | /* If we think we have keyboard input waiting, but didn't get SIGIO, |
d0d6b7c5 JB |
2551 | go read it. This can happen with X on BSD after logging out. |
2552 | In that case, there really is no input and no SIGIO, | |
2553 | but select says there is input. */ | |
2554 | ||
dd2281ae | 2555 | if (XINT (read_kbd) && interrupt_input |
5d5beb62 | 2556 | && keyboard_bit_set (&Available)) |
e643c5be | 2557 | kill (getpid (), SIGIO); |
4746118a | 2558 | #endif |
d0d6b7c5 | 2559 | |
d0d6b7c5 JB |
2560 | if (! wait_proc) |
2561 | got_some_input |= nfds > 0; | |
2562 | ||
32676c08 JB |
2563 | /* If checking input just got us a size-change event from X, |
2564 | obey it now if we should. */ | |
97f3b3d6 | 2565 | if (XINT (read_kbd) || wait_for_cell) |
32676c08 JB |
2566 | do_pending_window_change (); |
2567 | ||
a9f2c884 RS |
2568 | /* Check for data from a process. */ |
2569 | /* Really FIRST_PROC_DESC should be 0 on Unix, | |
2570 | but this is safer in the short run. */ | |
a69281ff | 2571 | for (channel = 0; channel <= max_process_desc; channel++) |
d0d6b7c5 | 2572 | { |
a69281ff RS |
2573 | if (FD_ISSET (channel, &Available) |
2574 | && FD_ISSET (channel, &non_keyboard_wait_mask)) | |
d0d6b7c5 JB |
2575 | { |
2576 | int nread; | |
2577 | ||
2578 | /* If waiting for this channel, arrange to return as | |
2579 | soon as no more input to be processed. No more | |
2580 | waiting. */ | |
2581 | if (wait_channel == channel) | |
2582 | { | |
a9f2c884 | 2583 | wait_channel = -1; |
d0d6b7c5 JB |
2584 | time_limit = -1; |
2585 | got_some_input = 1; | |
2586 | } | |
2587 | proc = chan_process[channel]; | |
2588 | if (NILP (proc)) | |
2589 | continue; | |
2590 | ||
d0d6b7c5 JB |
2591 | /* Read data from the process, starting with our |
2592 | buffered-ahead character if we have one. */ | |
2593 | ||
2594 | nread = read_process_output (proc, channel); | |
2595 | if (nread > 0) | |
2596 | { | |
2597 | /* Since read_process_output can run a filter, | |
2598 | which can call accept-process-output, | |
2599 | don't try to read from any other processes | |
2600 | before doing the select again. */ | |
2601 | FD_ZERO (&Available); | |
2602 | ||
2603 | if (do_display) | |
2604 | redisplay_preserve_echo_area (); | |
2605 | } | |
2606 | #ifdef EWOULDBLOCK | |
2607 | else if (nread == -1 && errno == EWOULDBLOCK) | |
2608 | ; | |
0b75e9a4 | 2609 | #endif |
89d7280d RS |
2610 | /* ISC 4.1 defines both EWOULDBLOCK and O_NONBLOCK, |
2611 | and Emacs uses O_NONBLOCK, so what we get is EAGAIN. */ | |
d0d6b7c5 JB |
2612 | #ifdef O_NONBLOCK |
2613 | else if (nread == -1 && errno == EAGAIN) | |
2614 | ; | |
2615 | #else | |
2616 | #ifdef O_NDELAY | |
2617 | else if (nread == -1 && errno == EAGAIN) | |
2618 | ; | |
2619 | /* Note that we cannot distinguish between no input | |
2620 | available now and a closed pipe. | |
2621 | With luck, a closed pipe will be accompanied by | |
2622 | subprocess termination and SIGCHLD. */ | |
2623 | else if (nread == 0 && !NETCONN_P (proc)) | |
2624 | ; | |
ffd56f97 JB |
2625 | #endif /* O_NDELAY */ |
2626 | #endif /* O_NONBLOCK */ | |
d0d6b7c5 JB |
2627 | #ifdef HAVE_PTYS |
2628 | /* On some OSs with ptys, when the process on one end of | |
2629 | a pty exits, the other end gets an error reading with | |
2630 | errno = EIO instead of getting an EOF (0 bytes read). | |
2631 | Therefore, if we get an error reading and errno = | |
2632 | EIO, just continue, because the child process has | |
2633 | exited and should clean itself up soon (e.g. when we | |
2634 | get a SIGCHLD). */ | |
2635 | else if (nread == -1 && errno == EIO) | |
2636 | ; | |
ffd56f97 JB |
2637 | #endif /* HAVE_PTYS */ |
2638 | /* If we can detect process termination, don't consider the process | |
2639 | gone just because its pipe is closed. */ | |
d0d6b7c5 JB |
2640 | #ifdef SIGCHLD |
2641 | else if (nread == 0 && !NETCONN_P (proc)) | |
2642 | ; | |
2643 | #endif | |
2644 | else | |
2645 | { | |
2646 | /* Preserve status of processes already terminated. */ | |
2647 | XSETINT (XPROCESS (proc)->tick, ++process_tick); | |
2648 | deactivate_process (proc); | |
2649 | if (!NILP (XPROCESS (proc)->raw_status_low)) | |
2650 | update_status (XPROCESS (proc)); | |
2651 | if (EQ (XPROCESS (proc)->status, Qrun)) | |
2652 | XPROCESS (proc)->status | |
2653 | = Fcons (Qexit, Fcons (make_number (256), Qnil)); | |
2654 | } | |
2655 | } | |
ffd56f97 JB |
2656 | } /* end for each file descriptor */ |
2657 | } /* end while exit conditions not met */ | |
d0d6b7c5 | 2658 | |
d430ee71 RS |
2659 | waiting_for_user_input_p = 0; |
2660 | ||
ffd56f97 JB |
2661 | /* If calling from keyboard input, do not quit |
2662 | since we want to return C-g as an input character. | |
2663 | Otherwise, do pending quit if requested. */ | |
f76475ad | 2664 | if (XINT (read_kbd) >= 0) |
ffd56f97 JB |
2665 | { |
2666 | /* Prevent input_pending from remaining set if we quit. */ | |
2667 | clear_input_pending (); | |
2668 | QUIT; | |
2669 | } | |
e07d5449 KH |
2670 | #ifdef hpux |
2671 | /* AlainF 5-Jul-1996 | |
2672 | HP-UX 10.10 seems to have problems with signals coming in | |
2673 | Causes "poll: interrupted system call" messages when Emacs is run | |
2674 | in an X window | |
2675 | Turn periodic alarms back on */ | |
5d5beb62 | 2676 | start_polling (); |
e07d5449 KH |
2677 | #endif |
2678 | ||
d0d6b7c5 JB |
2679 | return got_some_input; |
2680 | } | |
2681 | \f | |
3b9a3dfa RS |
2682 | /* Given a list (FUNCTION ARGS...), apply FUNCTION to the ARGS. */ |
2683 | ||
2684 | static Lisp_Object | |
2685 | read_process_output_call (fun_and_args) | |
2686 | Lisp_Object fun_and_args; | |
2687 | { | |
2688 | return apply1 (XCONS (fun_and_args)->car, XCONS (fun_and_args)->cdr); | |
2689 | } | |
2690 | ||
2691 | static Lisp_Object | |
2692 | read_process_output_error_handler (error) | |
2693 | Lisp_Object error; | |
2694 | { | |
2695 | cmd_error_internal (error, "error in process filter: "); | |
2696 | Vinhibit_quit = Qt; | |
2697 | update_echo_area (); | |
833ba342 | 2698 | Fsleep_for (make_number (2), Qnil); |
3b9a3dfa RS |
2699 | } |
2700 | ||
d0d6b7c5 JB |
2701 | /* Read pending output from the process channel, |
2702 | starting with our buffered-ahead character if we have one. | |
0fa1789e | 2703 | Yield number of decoded characters read. |
d0d6b7c5 JB |
2704 | |
2705 | This function reads at most 1024 characters. | |
2706 | If you want to read all available subprocess output, | |
0fa1789e KH |
2707 | you must call it repeatedly until it returns zero. |
2708 | ||
2709 | The characters read are decoded according to PROC's coding-system | |
2710 | for decoding. */ | |
d0d6b7c5 JB |
2711 | |
2712 | read_process_output (proc, channel) | |
2713 | Lisp_Object proc; | |
2714 | register int channel; | |
2715 | { | |
1d2fc612 | 2716 | register int nchars, nbytes; |
d0d6b7c5 | 2717 | char *chars; |
0fa1789e KH |
2718 | #ifdef VMS |
2719 | int chars_allocated = 0; /* If 1, `chars' should be freed later. */ | |
d0d6b7c5 | 2720 | #else |
0fa1789e | 2721 | char buf[1024]; |
d0d6b7c5 JB |
2722 | #endif |
2723 | register Lisp_Object outstream; | |
2724 | register struct buffer *old = current_buffer; | |
2725 | register struct Lisp_Process *p = XPROCESS (proc); | |
2726 | register int opoint; | |
c7580538 | 2727 | struct coding_system *coding = proc_decode_coding_system[channel]; |
0fa1789e KH |
2728 | int chars_in_decoding_buf = 0; /* If 1, `chars' points |
2729 | XSTRING (p->decoding_buf)->data. */ | |
e7fbaa65 | 2730 | int carryover = XINT (p->decoding_carryover); |
d0d6b7c5 JB |
2731 | |
2732 | #ifdef VMS | |
2733 | VMS_PROC_STUFF *vs, *get_vms_process_pointer(); | |
2734 | ||
2735 | vs = get_vms_process_pointer (p->pid); | |
2736 | if (vs) | |
2737 | { | |
2738 | if (!vs->iosb[0]) | |
2739 | return(0); /* Really weird if it does this */ | |
2740 | if (!(vs->iosb[0] & 1)) | |
2741 | return -1; /* I/O error */ | |
2742 | } | |
2743 | else | |
2744 | error ("Could not get VMS process pointer"); | |
2745 | chars = vs->inputBuffer; | |
1d2fc612 RS |
2746 | nbytes = clean_vms_buffer (chars, vs->iosb[1]); |
2747 | if (nbytes <= 0) | |
d0d6b7c5 JB |
2748 | { |
2749 | start_vms_process_read (vs); /* Crank up the next read on the process */ | |
2750 | return 1; /* Nothing worth printing, say we got 1 */ | |
2751 | } | |
e7fbaa65 | 2752 | if (carryover > 0) |
0fa1789e | 2753 | { |
e7fbaa65 KH |
2754 | /* The data carried over in the previous decoding (which are at |
2755 | the tail of decoding buffer) should be prepended to the new | |
2756 | data read to decode all together. */ | |
2757 | char *buf = (char *) xmalloc (nbytes + carryover); | |
2758 | ||
2759 | bcopy (XSTRING (p->decoding_buf)->data | |
2760 | + XSTRING (p->decoding_buf)->size_byte - carryover, | |
2761 | buf, carryover); | |
2762 | bcopy (chars, buf + carryover, nbytes); | |
0fa1789e KH |
2763 | chars = buf; |
2764 | chars_allocated = 1; | |
2765 | } | |
d0d6b7c5 JB |
2766 | #else /* not VMS */ |
2767 | ||
e7fbaa65 KH |
2768 | if (carryover) |
2769 | /* See the comment above. */ | |
2770 | bcopy (XSTRING (p->decoding_buf)->data | |
2771 | + XSTRING (p->decoding_buf)->size_byte - carryover, | |
2772 | buf, carryover); | |
0fa1789e | 2773 | |
d0d6b7c5 | 2774 | if (proc_buffered_char[channel] < 0) |
e7fbaa65 | 2775 | nbytes = read (channel, buf + carryover, (sizeof buf) - carryover); |
d0d6b7c5 JB |
2776 | else |
2777 | { | |
e7fbaa65 | 2778 | buf[carryover] = proc_buffered_char[channel]; |
d0d6b7c5 | 2779 | proc_buffered_char[channel] = -1; |
e7fbaa65 KH |
2780 | nbytes = read (channel, buf + carryover + 1, |
2781 | (sizeof buf) - carryover - 1); | |
1d2fc612 RS |
2782 | if (nbytes < 0) |
2783 | nbytes = 1; | |
d0d6b7c5 | 2784 | else |
1d2fc612 | 2785 | nbytes = nbytes + 1; |
d0d6b7c5 | 2786 | } |
0fa1789e | 2787 | chars = buf; |
d0d6b7c5 JB |
2788 | #endif /* not VMS */ |
2789 | ||
1d2fc612 | 2790 | /* At this point, NBYTES holds number of characters just received |
0fa1789e | 2791 | (including the one in proc_buffered_char[channel]). */ |
1d2fc612 | 2792 | if (nbytes <= 0) return nbytes; |
d0d6b7c5 | 2793 | |
1d2fc612 | 2794 | /* Now set NBYTES how many bytes we must decode. */ |
e7fbaa65 KH |
2795 | nbytes += carryover; |
2796 | nchars = nbytes; | |
0fa1789e | 2797 | |
e7fbaa65 | 2798 | if (CODING_MAY_REQUIRE_DECODING (coding)) |
0fa1789e | 2799 | { |
1d2fc612 | 2800 | int require = decoding_buffer_size (coding, nbytes); |
e7fbaa65 | 2801 | int result; |
0fa1789e | 2802 | |
1d2fc612 | 2803 | if (XSTRING (p->decoding_buf)->size_byte < require) |
0fa1789e | 2804 | p->decoding_buf = make_uninit_string (require); |
e7fbaa65 KH |
2805 | result = decode_coding (coding, chars, XSTRING (p->decoding_buf)->data, |
2806 | nbytes, XSTRING (p->decoding_buf)->size_byte); | |
2807 | carryover = nbytes - coding->consumed; | |
0fa1789e | 2808 | |
e7fbaa65 | 2809 | /* A new coding system might be found by `decode_coding'. */ |
0fa1789e KH |
2810 | if (!EQ (p->decode_coding_system, coding->symbol)) |
2811 | { | |
2812 | p->decode_coding_system = coding->symbol; | |
77e1b3d4 RS |
2813 | |
2814 | /* Don't call setup_coding_system for | |
2815 | proc_decode_coding_system[channel] here. It is done in | |
2816 | detect_coding called via decode_coding above. */ | |
2817 | ||
e7fbaa65 | 2818 | /* If a coding system for encoding is not yet decided, we set |
486b111b KH |
2819 | it as the same as coding-system for decoding. |
2820 | ||
2821 | But, before doing that we must check if | |
2822 | proc_encode_coding_system[p->outfd] surely points to a | |
2823 | valid memory because p->outfd will be changed once EOF is | |
2824 | sent to the process. */ | |
2825 | if (NILP (p->encode_coding_system) | |
2826 | && proc_encode_coding_system[p->outfd]) | |
0fa1789e KH |
2827 | { |
2828 | p->encode_coding_system = coding->symbol; | |
2829 | setup_coding_system (coding->symbol, | |
e9c509cd | 2830 | proc_encode_coding_system[p->outfd]); |
0fa1789e KH |
2831 | } |
2832 | } | |
1d2fc612 | 2833 | |
0fa1789e KH |
2834 | #ifdef VMS |
2835 | /* Now we don't need the contents of `chars'. */ | |
2836 | if (chars_allocated) | |
2837 | free (chars); | |
2838 | #endif | |
e7fbaa65 | 2839 | if (coding->produced == 0) |
0fa1789e | 2840 | return 0; |
d7223684 | 2841 | chars = (char *) XSTRING (p->decoding_buf)->data; |
e7fbaa65 KH |
2842 | nbytes = coding->produced; |
2843 | nchars = coding->produced_char; | |
0fa1789e KH |
2844 | chars_in_decoding_buf = 1; |
2845 | } | |
2846 | #ifdef VMS | |
2847 | else if (chars_allocated) | |
2848 | { | |
2849 | /* Although we don't have to decode the received data, we must | |
2850 | move it to an area which we don't have to free. */ | |
2851 | if (! STRINGP (p->decoding_buf) | |
1d2fc612 RS |
2852 | || XSTRING (p->decoding_buf)->size < nbytes) |
2853 | p->decoding_buf = make_uninit_string (nbytes); | |
2854 | bcopy (chars, XSTRING (p->decoding_buf)->data, nbytes); | |
0fa1789e KH |
2855 | free (chars); |
2856 | chars = XSTRING (p->decoding_buf)->data; | |
2857 | chars_in_decoding_buf = 1; | |
e7fbaa65 | 2858 | carryover = 0; |
0fa1789e KH |
2859 | } |
2860 | #endif | |
2861 | ||
e7fbaa65 | 2862 | XSETINT (p->decoding_carryover, carryover); |
486b111b KH |
2863 | Vlast_coding_system_used = coding->symbol; |
2864 | ||
1d2fc612 | 2865 | /* Read and dispose of the process output. */ |
d0d6b7c5 JB |
2866 | outstream = p->filter; |
2867 | if (!NILP (outstream)) | |
2868 | { | |
2869 | /* We inhibit quit here instead of just catching it so that | |
2870 | hitting ^G when a filter happens to be running won't screw | |
2871 | it up. */ | |
2872 | int count = specpdl_ptr - specpdl; | |
30c78175 | 2873 | Lisp_Object odeactivate; |
dfc21838 | 2874 | Lisp_Object obuffer, okeymap; |
1d2fc612 | 2875 | Lisp_Object text; |
4da2f5be | 2876 | int outer_running_asynch_code = running_asynch_code; |
30c78175 | 2877 | |
dfc21838 RS |
2878 | /* No need to gcpro these, because all we do with them later |
2879 | is test them for EQness, and none of them should be a string. */ | |
30c78175 | 2880 | odeactivate = Vdeactivate_mark; |
dfc21838 RS |
2881 | XSETBUFFER (obuffer, current_buffer); |
2882 | okeymap = current_buffer->keymap; | |
30c78175 | 2883 | |
d0d6b7c5 | 2884 | specbind (Qinhibit_quit, Qt); |
6545aada | 2885 | specbind (Qlast_nonmenu_event, Qt); |
3b9a3dfa | 2886 | |
4da2f5be RS |
2887 | /* In case we get recursively called, |
2888 | and we already saved the match data nonrecursively, | |
2889 | save the same match data in safely recursive fashion. */ | |
2890 | if (outer_running_asynch_code) | |
2891 | { | |
2892 | Lisp_Object tem; | |
2893 | /* Don't clobber the CURRENT match data, either! */ | |
dd130227 | 2894 | tem = Fmatch_data (Qnil, Qnil); |
4da2f5be | 2895 | restore_match_data (); |
dd130227 | 2896 | record_unwind_protect (Fstore_match_data, Fmatch_data (Qnil, Qnil)); |
4da2f5be RS |
2897 | Fstore_match_data (tem); |
2898 | } | |
2899 | ||
2900 | /* For speed, if a search happens within this code, | |
2901 | save the match data in a special nonrecursive fashion. */ | |
7074fde6 | 2902 | running_asynch_code = 1; |
4da2f5be | 2903 | |
1d2fc612 | 2904 | text = make_multibyte_string (chars, nchars, nbytes); |
3b9a3dfa RS |
2905 | internal_condition_case_1 (read_process_output_call, |
2906 | Fcons (outstream, | |
1d2fc612 | 2907 | Fcons (proc, Fcons (text, Qnil))), |
3b9a3dfa RS |
2908 | !NILP (Vdebug_on_error) ? Qnil : Qerror, |
2909 | read_process_output_error_handler); | |
4da2f5be RS |
2910 | |
2911 | /* If we saved the match data nonrecursively, restore it now. */ | |
7074fde6 | 2912 | restore_match_data (); |
4da2f5be | 2913 | running_asynch_code = outer_running_asynch_code; |
d0d6b7c5 | 2914 | |
592ce97f | 2915 | /* Handling the process output should not deactivate the mark. */ |
30c78175 RS |
2916 | Vdeactivate_mark = odeactivate; |
2917 | ||
7973cfa8 RS |
2918 | #if 0 /* Call record_asynch_buffer_change unconditionally, |
2919 | because we might have changed minor modes or other things | |
2920 | that affect key bindings. */ | |
dfc21838 RS |
2921 | if (! EQ (Fcurrent_buffer (), obuffer) |
2922 | || ! EQ (current_buffer->keymap, okeymap)) | |
7973cfa8 | 2923 | #endif |
927e08be RS |
2924 | /* But do it only if the caller is actually going to read events. |
2925 | Otherwise there's no need to make him wake up, and it could | |
2926 | cause trouble (for example it would make Fsit_for return). */ | |
2927 | if (waiting_for_user_input_p == -1) | |
2928 | record_asynch_buffer_change (); | |
d72534ba | 2929 | |
d0d6b7c5 JB |
2930 | #ifdef VMS |
2931 | start_vms_process_read (vs); | |
2932 | #endif | |
2ea6d561 | 2933 | unbind_to (count, Qnil); |
d0d6b7c5 JB |
2934 | return nchars; |
2935 | } | |
2936 | ||
2937 | /* If no filter, write into buffer if it isn't dead. */ | |
2938 | if (!NILP (p->buffer) && !NILP (XBUFFER (p->buffer)->name)) | |
2939 | { | |
b0310da4 | 2940 | Lisp_Object old_read_only; |
12ca5cdf | 2941 | int old_begv, old_zv; |
d8a2934e | 2942 | int old_begv_byte, old_zv_byte; |
30c78175 | 2943 | Lisp_Object odeactivate; |
d8a2934e RS |
2944 | int before, before_byte; |
2945 | int opoint_byte; | |
30c78175 RS |
2946 | |
2947 | odeactivate = Vdeactivate_mark; | |
d0d6b7c5 JB |
2948 | |
2949 | Fset_buffer (p->buffer); | |
6ec8bbd2 | 2950 | opoint = PT; |
d8a2934e | 2951 | opoint_byte = PT_BYTE; |
b0310da4 | 2952 | old_read_only = current_buffer->read_only; |
12ca5cdf RS |
2953 | old_begv = BEGV; |
2954 | old_zv = ZV; | |
d8a2934e RS |
2955 | old_begv_byte = BEGV_BYTE; |
2956 | old_zv_byte = ZV_BYTE; | |
b0310da4 JB |
2957 | |
2958 | current_buffer->read_only = Qnil; | |
d0d6b7c5 JB |
2959 | |
2960 | /* Insert new output into buffer | |
2961 | at the current end-of-output marker, | |
2962 | thus preserving logical ordering of input and output. */ | |
2963 | if (XMARKER (p->mark)->buffer) | |
d8a2934e RS |
2964 | SET_PT_BOTH (clip_to_bounds (BEGV, marker_position (p->mark), ZV), |
2965 | clip_to_bounds (BEGV_BYTE, marker_byte_position (p->mark), | |
2966 | ZV_BYTE)); | |
d0d6b7c5 | 2967 | else |
d8a2934e | 2968 | SET_PT_BOTH (ZV, ZV_BYTE); |
12ca5cdf | 2969 | before = PT; |
d8a2934e | 2970 | before_byte = PT_BYTE; |
b0310da4 JB |
2971 | |
2972 | /* If the output marker is outside of the visible region, save | |
2973 | the restriction and widen. */ | |
6ec8bbd2 | 2974 | if (! (BEGV <= PT && PT <= ZV)) |
b0310da4 JB |
2975 | Fwiden (); |
2976 | ||
d0d6b7c5 JB |
2977 | /* Insert before markers in case we are inserting where |
2978 | the buffer's mark is, and the user's next command is Meta-y. */ | |
0fa1789e | 2979 | if (chars_in_decoding_buf) |
1d2fc612 RS |
2980 | insert_from_string_before_markers (p->decoding_buf, 0, 0, |
2981 | nchars, nbytes, 0); | |
0fa1789e | 2982 | else |
1d2fc612 | 2983 | insert_1_both (chars, nchars, nbytes, 0, 1, 1); |
d8a2934e | 2984 | set_marker_both (p->mark, p->buffer, PT, PT_BYTE); |
b0310da4 | 2985 | |
d0d6b7c5 JB |
2986 | update_mode_lines++; |
2987 | ||
12ca5cdf RS |
2988 | /* Make sure opoint and the old restrictions |
2989 | float ahead of any new text just as point would. */ | |
2990 | if (opoint >= before) | |
d8a2934e RS |
2991 | { |
2992 | opoint += PT - before; | |
2993 | opoint_byte += PT_BYTE - before_byte; | |
2994 | } | |
12ca5cdf | 2995 | if (old_begv > before) |
d8a2934e RS |
2996 | { |
2997 | old_begv += PT - before; | |
2998 | old_begv_byte += PT_BYTE - before_byte; | |
2999 | } | |
12ca5cdf | 3000 | if (old_zv >= before) |
d8a2934e RS |
3001 | { |
3002 | old_zv += PT - before; | |
3003 | old_zv_byte += PT_BYTE - before_byte; | |
3004 | } | |
12ca5cdf | 3005 | |
b0310da4 | 3006 | /* If the restriction isn't what it should be, set it. */ |
12ca5cdf RS |
3007 | if (old_begv != BEGV || old_zv != ZV) |
3008 | Fnarrow_to_region (make_number (old_begv), make_number (old_zv)); | |
b0310da4 | 3009 | |
592ce97f | 3010 | /* Handling the process output should not deactivate the mark. */ |
30c78175 RS |
3011 | Vdeactivate_mark = odeactivate; |
3012 | ||
b0310da4 | 3013 | current_buffer->read_only = old_read_only; |
d8a2934e | 3014 | SET_PT_BOTH (opoint, opoint_byte); |
d0d6b7c5 JB |
3015 | set_buffer_internal (old); |
3016 | } | |
3017 | #ifdef VMS | |
3018 | start_vms_process_read (vs); | |
3019 | #endif | |
1d2fc612 | 3020 | return nbytes; |
d0d6b7c5 JB |
3021 | } |
3022 | ||
3023 | DEFUN ("waiting-for-user-input-p", Fwaiting_for_user_input_p, Swaiting_for_user_input_p, | |
3024 | 0, 0, 0, | |
8b4d685f | 3025 | "Returns non-nil if emacs is waiting for input from the user.\n\ |
d0d6b7c5 JB |
3026 | This is intended for use by asynchronous process output filters and sentinels.") |
3027 | () | |
3028 | { | |
8b4d685f | 3029 | return (waiting_for_user_input_p ? Qt : Qnil); |
d0d6b7c5 JB |
3030 | } |
3031 | \f | |
3032 | /* Sending data to subprocess */ | |
3033 | ||
3034 | jmp_buf send_process_frame; | |
3035 | ||
3036 | SIGTYPE | |
3037 | send_process_trap () | |
3038 | { | |
3039 | #ifdef BSD4_1 | |
3040 | sigrelse (SIGPIPE); | |
3041 | sigrelse (SIGALRM); | |
3042 | #endif /* BSD4_1 */ | |
3043 | longjmp (send_process_frame, 1); | |
3044 | } | |
3045 | ||
4556b700 RS |
3046 | /* Send some data to process PROC. |
3047 | BUF is the beginning of the data; LEN is the number of characters. | |
0fa1789e KH |
3048 | OBJECT is the Lisp object that the data comes from. |
3049 | ||
3050 | The data is encoded by PROC's coding-system for encoding before it | |
3051 | is sent. But if the data ends at the middle of multi-byte | |
3052 | representation, that incomplete sequence of bytes are sent without | |
3053 | being encoded. Should we store them in a buffer to prepend them to | |
3054 | the data send later? */ | |
4556b700 RS |
3055 | |
3056 | send_process (proc, buf, len, object) | |
ecd1f654 | 3057 | volatile Lisp_Object proc; |
b684d043 | 3058 | unsigned char *buf; |
d0d6b7c5 | 3059 | int len; |
4556b700 | 3060 | Lisp_Object object; |
d0d6b7c5 | 3061 | { |
ecd1f654 | 3062 | /* Use volatile to protect variables from being clobbered by longjmp. */ |
d0d6b7c5 | 3063 | int rv; |
ecd1f654 | 3064 | volatile unsigned char *procname = XSTRING (XPROCESS (proc)->name)->data; |
0fa1789e | 3065 | struct coding_system *coding; |
6044e593 | 3066 | struct gcpro gcpro1; |
e7fbaa65 | 3067 | int carryover = XINT (XPROCESS (proc)->encoding_carryover); |
6044e593 RS |
3068 | |
3069 | GCPRO1 (object); | |
d0d6b7c5 | 3070 | |
d0d6b7c5 JB |
3071 | #ifdef VMS |
3072 | struct Lisp_Process *p = XPROCESS (proc); | |
3073 | VMS_PROC_STUFF *vs, *get_vms_process_pointer(); | |
3074 | #endif /* VMS */ | |
3075 | ||
3076 | if (! NILP (XPROCESS (proc)->raw_status_low)) | |
3077 | update_status (XPROCESS (proc)); | |
3078 | if (! EQ (XPROCESS (proc)->status, Qrun)) | |
3079 | error ("Process %s not running", procname); | |
0fa1789e KH |
3080 | if (XINT (XPROCESS (proc)->outfd) < 0) |
3081 | error ("Output file descriptor of %s is closed", procname); | |
3082 | ||
c7580538 | 3083 | coding = proc_encode_coding_system[XINT (XPROCESS (proc)->outfd)]; |
486b111b KH |
3084 | Vlast_coding_system_used = coding->symbol; |
3085 | ||
1a283a4c | 3086 | if (CODING_REQUIRE_ENCODING (coding)) |
0fa1789e KH |
3087 | { |
3088 | int require = encoding_buffer_size (coding, len); | |
3089 | int offset, dummy; | |
b684d043 | 3090 | unsigned char *temp_buf = NULL; |
0fa1789e KH |
3091 | |
3092 | /* Remember the offset of data because a string or a buffer may | |
3093 | be relocated. Setting OFFSET to -1 means we don't have to | |
3094 | care relocation. */ | |
3095 | offset = (BUFFERP (object) | |
d8a2934e | 3096 | ? BUF_PTR_BYTE_POS (XBUFFER (object), buf) |
0fa1789e | 3097 | : (STRINGP (object) |
b684d043 | 3098 | ? offset = buf - XSTRING (object)->data |
0fa1789e KH |
3099 | : -1)); |
3100 | ||
e7fbaa65 | 3101 | if (carryover > 0) |
0fa1789e | 3102 | { |
e7fbaa65 | 3103 | temp_buf = (unsigned char *) xmalloc (len + carryover); |
0fa1789e KH |
3104 | |
3105 | if (offset >= 0) | |
3106 | { | |
3107 | if (BUFFERP (object)) | |
d8a2934e | 3108 | buf = BUF_BYTE_ADDRESS (XBUFFER (object), offset); |
0fa1789e | 3109 | else if (STRINGP (object)) |
b684d043 | 3110 | buf = offset + XSTRING (object)->data; |
0fa1789e KH |
3111 | /* Now we don't have to care relocation. */ |
3112 | offset = -1; | |
3113 | } | |
e7fbaa65 KH |
3114 | bcopy ((XSTRING (XPROCESS (proc)->encoding_buf)->data |
3115 | + XSTRING (XPROCESS (proc)->encoding_buf)->size_byte | |
3116 | - carryover), | |
3117 | temp_buf, | |
3118 | carryover); | |
3119 | bcopy (buf, temp_buf + carryover, len); | |
0fa1789e KH |
3120 | buf = temp_buf; |
3121 | } | |
3122 | ||
1d2fc612 | 3123 | if (XSTRING (XPROCESS (proc)->encoding_buf)->size_byte < require) |
0fa1789e KH |
3124 | { |
3125 | XPROCESS (proc)->encoding_buf = make_uninit_string (require); | |
3126 | ||
3127 | if (offset >= 0) | |
3128 | { | |
3129 | if (BUFFERP (object)) | |
d8a2934e | 3130 | buf = BUF_BYTE_ADDRESS (XBUFFER (object), offset); |
0fa1789e | 3131 | else if (STRINGP (object)) |
b684d043 | 3132 | buf = offset + XSTRING (object)->data; |
0fa1789e KH |
3133 | } |
3134 | } | |
3135 | object = XPROCESS (proc)->encoding_buf; | |
e7fbaa65 KH |
3136 | encode_coding (coding, buf, XSTRING (object)->data, |
3137 | len, XSTRING (object)->size_byte); | |
3138 | len = coding->produced; | |
0fa1789e KH |
3139 | buf = XSTRING (object)->data; |
3140 | if (temp_buf) | |
3141 | xfree (temp_buf); | |
3142 | } | |
d0d6b7c5 JB |
3143 | |
3144 | #ifdef VMS | |
3145 | vs = get_vms_process_pointer (p->pid); | |
3146 | if (vs == 0) | |
3147 | error ("Could not find this process: %x", p->pid); | |
3148 | else if (write_to_vms_process (vs, buf, len)) | |
3149 | ; | |
3150 | #else | |
4556b700 RS |
3151 | |
3152 | if (pty_max_bytes == 0) | |
3153 | { | |
3154 | #if defined (HAVE_FPATHCONF) && defined (_PC_MAX_CANON) | |
3155 | pty_max_bytes = fpathconf (XFASTINT (XPROCESS (proc)->outfd), | |
3156 | _PC_MAX_CANON); | |
3157 | if (pty_max_bytes < 0) | |
3158 | pty_max_bytes = 250; | |
3159 | #else | |
3160 | pty_max_bytes = 250; | |
3161 | #endif | |
3162 | /* Deduct one, to leave space for the eof. */ | |
3163 | pty_max_bytes--; | |
3164 | } | |
3165 | ||
d0d6b7c5 JB |
3166 | if (!setjmp (send_process_frame)) |
3167 | while (len > 0) | |
3168 | { | |
3169 | int this = len; | |
4746118a | 3170 | SIGTYPE (*old_sigpipe)(); |
93b4f699 RS |
3171 | int flush_pty = 0; |
3172 | ||
4556b700 RS |
3173 | /* Decide how much data we can send in one batch. |
3174 | Long lines need to be split into multiple batches. */ | |
3175 | if (!NILP (XPROCESS (proc)->pty_flag)) | |
93b4f699 | 3176 | { |
4556b700 RS |
3177 | /* Starting this at zero is always correct when not the first iteration |
3178 | because the previous iteration ended by sending C-d. | |
3179 | It may not be correct for the first iteration | |
3180 | if a partial line was sent in a separate send_process call. | |
3181 | If that proves worth handling, we need to save linepos | |
3182 | in the process object. */ | |
3183 | int linepos = 0; | |
b684d043 RS |
3184 | unsigned char *ptr = buf; |
3185 | unsigned char *end = buf + len; | |
4556b700 RS |
3186 | |
3187 | /* Scan through this text for a line that is too long. */ | |
3188 | while (ptr != end && linepos < pty_max_bytes) | |
3189 | { | |
3190 | if (*ptr == '\n') | |
3191 | linepos = 0; | |
3192 | else | |
3193 | linepos++; | |
3194 | ptr++; | |
3195 | } | |
3196 | /* If we found one, break the line there | |
3197 | and put in a C-d to force the buffer through. */ | |
3198 | this = ptr - buf; | |
93b4f699 RS |
3199 | } |
3200 | ||
4556b700 RS |
3201 | /* Send this batch, using one or more write calls. */ |
3202 | while (this > 0) | |
d0d6b7c5 | 3203 | { |
4556b700 RS |
3204 | old_sigpipe = (SIGTYPE (*) ()) signal (SIGPIPE, send_process_trap); |
3205 | rv = write (XINT (XPROCESS (proc)->outfd), buf, this); | |
3206 | signal (SIGPIPE, old_sigpipe); | |
3207 | ||
3208 | if (rv < 0) | |
3209 | { | |
3210 | if (0 | |
d0d6b7c5 | 3211 | #ifdef EWOULDBLOCK |
4556b700 | 3212 | || errno == EWOULDBLOCK |
d0d6b7c5 JB |
3213 | #endif |
3214 | #ifdef EAGAIN | |
4556b700 | 3215 | || errno == EAGAIN |
d0d6b7c5 | 3216 | #endif |
4556b700 RS |
3217 | ) |
3218 | /* Buffer is full. Wait, accepting input; | |
3219 | that may allow the program | |
3220 | to finish doing output and read more. */ | |
3221 | { | |
3222 | Lisp_Object zero; | |
3223 | int offset; | |
3224 | ||
3225 | /* Running filters might relocate buffers or strings. | |
3226 | Arrange to relocate BUF. */ | |
3227 | if (BUFFERP (object)) | |
d8a2934e | 3228 | offset = BUF_PTR_BYTE_POS (XBUFFER (object), buf); |
4556b700 | 3229 | else if (STRINGP (object)) |
b684d043 | 3230 | offset = buf - XSTRING (object)->data; |
4556b700 | 3231 | |
22719df2 | 3232 | XSETFASTINT (zero, 0); |
f3e6605c RS |
3233 | #ifdef EMACS_HAS_USECS |
3234 | wait_reading_process_input (0, 20000, zero, 0); | |
3235 | #else | |
4556b700 | 3236 | wait_reading_process_input (1, 0, zero, 0); |
f3e6605c | 3237 | #endif |
4556b700 RS |
3238 | |
3239 | if (BUFFERP (object)) | |
d8a2934e | 3240 | buf = BUF_BYTE_ADDRESS (XBUFFER (object), offset); |
4556b700 | 3241 | else if (STRINGP (object)) |
b684d043 | 3242 | buf = offset + XSTRING (object)->data; |
4556b700 RS |
3243 | |
3244 | rv = 0; | |
3245 | } | |
3246 | else | |
3247 | /* This is a real error. */ | |
3248 | report_file_error ("writing to process", Fcons (proc, Qnil)); | |
d0d6b7c5 | 3249 | } |
4556b700 RS |
3250 | buf += rv; |
3251 | len -= rv; | |
3252 | this -= rv; | |
d0d6b7c5 | 3253 | } |
f76475ad | 3254 | |
4556b700 RS |
3255 | /* If we sent just part of the string, put in an EOF |
3256 | to force it through, before we send the rest. */ | |
3257 | if (len > 0) | |
3258 | Fprocess_send_eof (proc); | |
d0d6b7c5 JB |
3259 | } |
3260 | #endif | |
3261 | else | |
3262 | { | |
3263 | XPROCESS (proc)->raw_status_low = Qnil; | |
3264 | XPROCESS (proc)->raw_status_high = Qnil; | |
3265 | XPROCESS (proc)->status = Fcons (Qexit, Fcons (make_number (256), Qnil)); | |
3266 | XSETINT (XPROCESS (proc)->tick, ++process_tick); | |
3267 | deactivate_process (proc); | |
3268 | #ifdef VMS | |
3269 | error ("Error writing to process %s; closed it", procname); | |
3270 | #else | |
3271 | error ("SIGPIPE raised on process %s; closed it", procname); | |
3272 | #endif | |
3273 | } | |
6044e593 RS |
3274 | |
3275 | UNGCPRO; | |
d0d6b7c5 JB |
3276 | } |
3277 | ||
3278 | DEFUN ("process-send-region", Fprocess_send_region, Sprocess_send_region, | |
3279 | 3, 3, 0, | |
3280 | "Send current contents of region as input to PROCESS.\n\ | |
ebb9e16f JB |
3281 | PROCESS may be a process, a buffer, the name of a process or buffer, or\n\ |
3282 | nil, indicating the current buffer's process.\n\ | |
d0d6b7c5 JB |
3283 | Called from program, takes three arguments, PROCESS, START and END.\n\ |
3284 | If the region is more than 500 characters long,\n\ | |
3285 | it is sent in several bunches. This may happen even for shorter regions.\n\ | |
3286 | Output from processes can arrive in between bunches.") | |
3287 | (process, start, end) | |
3288 | Lisp_Object process, start, end; | |
3289 | { | |
3290 | Lisp_Object proc; | |
d8a2934e | 3291 | int start1, end1; |
d0d6b7c5 JB |
3292 | |
3293 | proc = get_process (process); | |
3294 | validate_region (&start, &end); | |
3295 | ||
3296 | if (XINT (start) < GPT && XINT (end) > GPT) | |
4da6dec8 | 3297 | move_gap (XINT (start)); |
d0d6b7c5 | 3298 | |
d8a2934e RS |
3299 | start1 = CHAR_TO_BYTE (XINT (start)); |
3300 | end1 = CHAR_TO_BYTE (XINT (end)); | |
3301 | send_process (proc, BYTE_POS_ADDR (start1), end1 - start1, | |
4556b700 | 3302 | Fcurrent_buffer ()); |
d0d6b7c5 JB |
3303 | |
3304 | return Qnil; | |
3305 | } | |
3306 | ||
3307 | DEFUN ("process-send-string", Fprocess_send_string, Sprocess_send_string, | |
3308 | 2, 2, 0, | |
3309 | "Send PROCESS the contents of STRING as input.\n\ | |
ebb9e16f JB |
3310 | PROCESS may be a process, a buffer, the name of a process or buffer, or\n\ |
3311 | nil, indicating the current buffer's process.\n\ | |
d0d6b7c5 JB |
3312 | If STRING is more than 500 characters long,\n\ |
3313 | it is sent in several bunches. This may happen even for shorter strings.\n\ | |
3314 | Output from processes can arrive in between bunches.") | |
3315 | (process, string) | |
3316 | Lisp_Object process, string; | |
3317 | { | |
3318 | Lisp_Object proc; | |
3319 | CHECK_STRING (string, 1); | |
3320 | proc = get_process (process); | |
1d2fc612 RS |
3321 | send_process (proc, XSTRING (string)->data, |
3322 | XSTRING (string)->size_byte, string); | |
d0d6b7c5 JB |
3323 | return Qnil; |
3324 | } | |
3325 | \f | |
3326 | /* send a signal number SIGNO to PROCESS. | |
3327 | CURRENT_GROUP means send to the process group that currently owns | |
3328 | the terminal being used to communicate with PROCESS. | |
3329 | This is used for various commands in shell mode. | |
3330 | If NOMSG is zero, insert signal-announcements into process's buffers | |
b0310da4 JB |
3331 | right away. |
3332 | ||
3333 | If we can, we try to signal PROCESS by sending control characters | |
e333e864 | 3334 | down the pty. This allows us to signal inferiors who have changed |
b0310da4 | 3335 | their uid, for which killpg would return an EPERM error. */ |
d0d6b7c5 | 3336 | |
f9738840 | 3337 | static void |
d0d6b7c5 JB |
3338 | process_send_signal (process, signo, current_group, nomsg) |
3339 | Lisp_Object process; | |
3340 | int signo; | |
3341 | Lisp_Object current_group; | |
3342 | int nomsg; | |
3343 | { | |
3344 | Lisp_Object proc; | |
3345 | register struct Lisp_Process *p; | |
3346 | int gid; | |
3347 | int no_pgrp = 0; | |
3348 | ||
3349 | proc = get_process (process); | |
3350 | p = XPROCESS (proc); | |
3351 | ||
3352 | if (!EQ (p->childp, Qt)) | |
3353 | error ("Process %s is not a subprocess", | |
3354 | XSTRING (p->name)->data); | |
a9f2c884 | 3355 | if (XINT (p->infd) < 0) |
d0d6b7c5 JB |
3356 | error ("Process %s is not active", |
3357 | XSTRING (p->name)->data); | |
3358 | ||
3359 | if (NILP (p->pty_flag)) | |
3360 | current_group = Qnil; | |
3361 | ||
d0d6b7c5 JB |
3362 | /* If we are using pgrps, get a pgrp number and make it negative. */ |
3363 | if (!NILP (current_group)) | |
3364 | { | |
b0310da4 | 3365 | #ifdef SIGNALS_VIA_CHARACTERS |
d0d6b7c5 JB |
3366 | /* If possible, send signals to the entire pgrp |
3367 | by sending an input character to it. */ | |
b0310da4 | 3368 | |
6be429b1 JB |
3369 | /* TERMIOS is the latest and bestest, and seems most likely to |
3370 | work. If the system has it, use it. */ | |
3371 | #ifdef HAVE_TERMIOS | |
3372 | struct termios t; | |
3373 | ||
3374 | switch (signo) | |
3375 | { | |
3376 | case SIGINT: | |
a9f2c884 | 3377 | tcgetattr (XINT (p->infd), &t); |
4556b700 | 3378 | send_process (proc, &t.c_cc[VINTR], 1, Qnil); |
a87b802f | 3379 | return; |
6be429b1 JB |
3380 | |
3381 | case SIGQUIT: | |
a9f2c884 | 3382 | tcgetattr (XINT (p->infd), &t); |
4556b700 | 3383 | send_process (proc, &t.c_cc[VQUIT], 1, Qnil); |
a87b802f | 3384 | return; |
6be429b1 JB |
3385 | |
3386 | case SIGTSTP: | |
a9f2c884 | 3387 | tcgetattr (XINT (p->infd), &t); |
d0adf46f | 3388 | #if defined (VSWTCH) && !defined (PREFER_VSUSP) |
4556b700 | 3389 | send_process (proc, &t.c_cc[VSWTCH], 1, Qnil); |
6be429b1 | 3390 | #else |
4556b700 | 3391 | send_process (proc, &t.c_cc[VSUSP], 1, Qnil); |
6be429b1 | 3392 | #endif |
a87b802f | 3393 | return; |
6be429b1 JB |
3394 | } |
3395 | ||
3396 | #else /* ! HAVE_TERMIOS */ | |
3397 | ||
b0310da4 JB |
3398 | /* On Berkeley descendants, the following IOCTL's retrieve the |
3399 | current control characters. */ | |
d0d6b7c5 | 3400 | #if defined (TIOCGLTC) && defined (TIOCGETC) |
b0310da4 | 3401 | |
d0d6b7c5 JB |
3402 | struct tchars c; |
3403 | struct ltchars lc; | |
3404 | ||
3405 | switch (signo) | |
3406 | { | |
3407 | case SIGINT: | |
a9f2c884 | 3408 | ioctl (XINT (p->infd), TIOCGETC, &c); |
4556b700 | 3409 | send_process (proc, &c.t_intrc, 1, Qnil); |
f9738840 | 3410 | return; |
d0d6b7c5 | 3411 | case SIGQUIT: |
a9f2c884 | 3412 | ioctl (XINT (p->infd), TIOCGETC, &c); |
4556b700 | 3413 | send_process (proc, &c.t_quitc, 1, Qnil); |
f9738840 | 3414 | return; |
0ad77c54 | 3415 | #ifdef SIGTSTP |
d0d6b7c5 | 3416 | case SIGTSTP: |
a9f2c884 | 3417 | ioctl (XINT (p->infd), TIOCGLTC, &lc); |
4556b700 | 3418 | send_process (proc, &lc.t_suspc, 1, Qnil); |
f9738840 | 3419 | return; |
b0310da4 | 3420 | #endif /* ! defined (SIGTSTP) */ |
d0d6b7c5 | 3421 | } |
b0310da4 JB |
3422 | |
3423 | #else /* ! defined (TIOCGLTC) && defined (TIOCGETC) */ | |
3424 | ||
3425 | /* On SYSV descendants, the TCGETA ioctl retrieves the current control | |
3426 | characters. */ | |
3427 | #ifdef TCGETA | |
d0d6b7c5 JB |
3428 | struct termio t; |
3429 | switch (signo) | |
3430 | { | |
3431 | case SIGINT: | |
a9f2c884 | 3432 | ioctl (XINT (p->infd), TCGETA, &t); |
4556b700 | 3433 | send_process (proc, &t.c_cc[VINTR], 1, Qnil); |
f9738840 | 3434 | return; |
d0d6b7c5 | 3435 | case SIGQUIT: |
a9f2c884 | 3436 | ioctl (XINT (p->infd), TCGETA, &t); |
4556b700 | 3437 | send_process (proc, &t.c_cc[VQUIT], 1, Qnil); |
f9738840 | 3438 | return; |
7d79e3b4 | 3439 | #ifdef SIGTSTP |
d0d6b7c5 | 3440 | case SIGTSTP: |
a9f2c884 | 3441 | ioctl (XINT (p->infd), TCGETA, &t); |
4556b700 | 3442 | send_process (proc, &t.c_cc[VSWTCH], 1, Qnil); |
f9738840 | 3443 | return; |
b0310da4 | 3444 | #endif /* ! defined (SIGTSTP) */ |
d0d6b7c5 | 3445 | } |
b0310da4 JB |
3446 | #else /* ! defined (TCGETA) */ |
3447 | Your configuration files are messed up. | |
3448 | /* If your system configuration files define SIGNALS_VIA_CHARACTERS, | |
3449 | you'd better be using one of the alternatives above! */ | |
3450 | #endif /* ! defined (TCGETA) */ | |
3451 | #endif /* ! defined (TIOCGLTC) && defined (TIOCGETC) */ | |
6be429b1 | 3452 | #endif /* ! defined HAVE_TERMIOS */ |
b0310da4 | 3453 | #endif /* ! defined (SIGNALS_VIA_CHARACTERS) */ |
d0d6b7c5 | 3454 | |
301c3fe4 | 3455 | #ifdef TIOCGPGRP |
d0d6b7c5 JB |
3456 | /* Get the pgrp using the tty itself, if we have that. |
3457 | Otherwise, use the pty to get the pgrp. | |
3458 | On pfa systems, saka@pfu.fujitsu.co.JP writes: | |
b0310da4 JB |
3459 | "TIOCGPGRP symbol defined in sys/ioctl.h at E50. |
3460 | But, TIOCGPGRP does not work on E50 ;-P works fine on E60" | |
d0d6b7c5 JB |
3461 | His patch indicates that if TIOCGPGRP returns an error, then |
3462 | we should just assume that p->pid is also the process group id. */ | |
3463 | { | |
3464 | int err; | |
3465 | ||
3466 | if (!NILP (p->subtty)) | |
3467 | err = ioctl (XFASTINT (p->subtty), TIOCGPGRP, &gid); | |
3468 | else | |
a9f2c884 | 3469 | err = ioctl (XINT (p->infd), TIOCGPGRP, &gid); |
d0d6b7c5 JB |
3470 | |
3471 | #ifdef pfa | |
3472 | if (err == -1) | |
3473 | gid = - XFASTINT (p->pid); | |
301c3fe4 | 3474 | #endif /* ! defined (pfa) */ |
d0d6b7c5 JB |
3475 | } |
3476 | if (gid == -1) | |
3477 | no_pgrp = 1; | |
3478 | else | |
3479 | gid = - gid; | |
b0310da4 | 3480 | #else /* ! defined (TIOCGPGRP ) */ |
301c3fe4 JB |
3481 | /* Can't select pgrps on this system, so we know that |
3482 | the child itself heads the pgrp. */ | |
3483 | gid = - XFASTINT (p->pid); | |
3484 | #endif /* ! defined (TIOCGPGRP ) */ | |
d0d6b7c5 JB |
3485 | } |
3486 | else | |
3487 | gid = - XFASTINT (p->pid); | |
d0d6b7c5 JB |
3488 | |
3489 | switch (signo) | |
3490 | { | |
3491 | #ifdef SIGCONT | |
3492 | case SIGCONT: | |
3493 | p->raw_status_low = Qnil; | |
3494 | p->raw_status_high = Qnil; | |
3495 | p->status = Qrun; | |
3496 | XSETINT (p->tick, ++process_tick); | |
3497 | if (!nomsg) | |
3498 | status_notify (); | |
3499 | break; | |
301c3fe4 | 3500 | #endif /* ! defined (SIGCONT) */ |
d0d6b7c5 JB |
3501 | case SIGINT: |
3502 | #ifdef VMS | |
4556b700 | 3503 | send_process (proc, "\003", 1, Qnil); /* ^C */ |
d0d6b7c5 JB |
3504 | goto whoosh; |
3505 | #endif | |
3506 | case SIGQUIT: | |
3507 | #ifdef VMS | |
4556b700 | 3508 | send_process (proc, "\031", 1, Qnil); /* ^Y */ |
d0d6b7c5 JB |
3509 | goto whoosh; |
3510 | #endif | |
3511 | case SIGKILL: | |
3512 | #ifdef VMS | |
3513 | sys$forcex (&(XFASTINT (p->pid)), 0, 1); | |
3514 | whoosh: | |
3515 | #endif | |
a9f2c884 | 3516 | flush_pending_output (XINT (p->infd)); |
d0d6b7c5 JB |
3517 | break; |
3518 | } | |
3519 | ||
3520 | /* If we don't have process groups, send the signal to the immediate | |
3521 | subprocess. That isn't really right, but it's better than any | |
3522 | obvious alternative. */ | |
3523 | if (no_pgrp) | |
3524 | { | |
3525 | kill (XFASTINT (p->pid), signo); | |
3526 | return; | |
3527 | } | |
3528 | ||
3529 | /* gid may be a pid, or minus a pgrp's number */ | |
3530 | #ifdef TIOCSIGSEND | |
3531 | if (!NILP (current_group)) | |
a9f2c884 | 3532 | ioctl (XINT (p->infd), TIOCSIGSEND, signo); |
d0d6b7c5 JB |
3533 | else |
3534 | { | |
3535 | gid = - XFASTINT (p->pid); | |
3536 | kill (gid, signo); | |
3537 | } | |
301c3fe4 | 3538 | #else /* ! defined (TIOCSIGSEND) */ |
d0d6b7c5 | 3539 | EMACS_KILLPG (-gid, signo); |
301c3fe4 | 3540 | #endif /* ! defined (TIOCSIGSEND) */ |
d0d6b7c5 JB |
3541 | } |
3542 | ||
3543 | DEFUN ("interrupt-process", Finterrupt_process, Sinterrupt_process, 0, 2, 0, | |
3544 | "Interrupt process PROCESS. May be process or name of one.\n\ | |
ebb9e16f | 3545 | PROCESS may be a process, a buffer, or the name of a process or buffer.\n\ |
e333e864 | 3546 | nil or no arg means current buffer's process.\n\ |
d0d6b7c5 JB |
3547 | Second arg CURRENT-GROUP non-nil means send signal to\n\ |
3548 | the current process-group of the process's controlling terminal\n\ | |
3549 | rather than to the process's own process group.\n\ | |
3550 | If the process is a shell, this means interrupt current subjob\n\ | |
3551 | rather than the shell.") | |
3552 | (process, current_group) | |
3553 | Lisp_Object process, current_group; | |
3554 | { | |
3555 | process_send_signal (process, SIGINT, current_group, 0); | |
3556 | return process; | |
3557 | } | |
3558 | ||
3559 | DEFUN ("kill-process", Fkill_process, Skill_process, 0, 2, 0, | |
3560 | "Kill process PROCESS. May be process or name of one.\n\ | |
3561 | See function `interrupt-process' for more details on usage.") | |
3562 | (process, current_group) | |
3563 | Lisp_Object process, current_group; | |
3564 | { | |
3565 | process_send_signal (process, SIGKILL, current_group, 0); | |
3566 | return process; | |
3567 | } | |
3568 | ||
3569 | DEFUN ("quit-process", Fquit_process, Squit_process, 0, 2, 0, | |
3570 | "Send QUIT signal to process PROCESS. May be process or name of one.\n\ | |
3571 | See function `interrupt-process' for more details on usage.") | |
3572 | (process, current_group) | |
3573 | Lisp_Object process, current_group; | |
3574 | { | |
3575 | process_send_signal (process, SIGQUIT, current_group, 0); | |
3576 | return process; | |
3577 | } | |
3578 | ||
3579 | DEFUN ("stop-process", Fstop_process, Sstop_process, 0, 2, 0, | |
3580 | "Stop process PROCESS. May be process or name of one.\n\ | |
3581 | See function `interrupt-process' for more details on usage.") | |
3582 | (process, current_group) | |
3583 | Lisp_Object process, current_group; | |
3584 | { | |
3585 | #ifndef SIGTSTP | |
3586 | error ("no SIGTSTP support"); | |
3587 | #else | |
3588 | process_send_signal (process, SIGTSTP, current_group, 0); | |
3589 | #endif | |
3590 | return process; | |
3591 | } | |
3592 | ||
3593 | DEFUN ("continue-process", Fcontinue_process, Scontinue_process, 0, 2, 0, | |
3594 | "Continue process PROCESS. May be process or name of one.\n\ | |
3595 | See function `interrupt-process' for more details on usage.") | |
3596 | (process, current_group) | |
3597 | Lisp_Object process, current_group; | |
3598 | { | |
3599 | #ifdef SIGCONT | |
3600 | process_send_signal (process, SIGCONT, current_group, 0); | |
3601 | #else | |
3602 | error ("no SIGCONT support"); | |
3603 | #endif | |
3604 | return process; | |
3605 | } | |
3606 | ||
3607 | DEFUN ("signal-process", Fsignal_process, Ssignal_process, | |
3608 | 2, 2, "nProcess number: \nnSignal code: ", | |
4766242d RS |
3609 | "Send the process with process id PID the signal with code SIGCODE.\n\ |
3610 | PID must be an integer. The process need not be a child of this Emacs.\n\ | |
3611 | SIGCODE may be an integer, or a symbol whose name is a signal name.") | |
3612 | (pid, sigcode) | |
3613 | Lisp_Object pid, sigcode; | |
d0d6b7c5 JB |
3614 | { |
3615 | CHECK_NUMBER (pid, 0); | |
4766242d RS |
3616 | |
3617 | #define handle_signal(NAME, VALUE) \ | |
3618 | else if (!strcmp (name, NAME)) \ | |
3619 | XSETINT (sigcode, VALUE) | |
3620 | ||
3621 | if (INTEGERP (sigcode)) | |
3622 | ; | |
3623 | else | |
3624 | { | |
3625 | unsigned char *name; | |
3626 | ||
3627 | CHECK_SYMBOL (sigcode, 1); | |
3628 | name = XSYMBOL (sigcode)->name->data; | |
3629 | ||
3630 | if (0) | |
3631 | ; | |
3632 | #ifdef SIGHUP | |
3633 | handle_signal ("SIGHUP", SIGHUP); | |
3634 | #endif | |
3635 | #ifdef SIGINT | |
3636 | handle_signal ("SIGINT", SIGINT); | |
3637 | #endif | |
3638 | #ifdef SIGQUIT | |
3639 | handle_signal ("SIGQUIT", SIGQUIT); | |
3640 | #endif | |
3641 | #ifdef SIGILL | |
3642 | handle_signal ("SIGILL", SIGILL); | |
3643 | #endif | |
3644 | #ifdef SIGABRT | |
3645 | handle_signal ("SIGABRT", SIGABRT); | |
3646 | #endif | |
3647 | #ifdef SIGEMT | |
3648 | handle_signal ("SIGEMT", SIGEMT); | |
3649 | #endif | |
3650 | #ifdef SIGKILL | |
3651 | handle_signal ("SIGKILL", SIGKILL); | |
3652 | #endif | |
3653 | #ifdef SIGFPE | |
3654 | handle_signal ("SIGFPE", SIGFPE); | |
3655 | #endif | |
3656 | #ifdef SIGBUS | |
3657 | handle_signal ("SIGBUS", SIGBUS); | |
3658 | #endif | |
3659 | #ifdef SIGSEGV | |
3660 | handle_signal ("SIGSEGV", SIGSEGV); | |
3661 | #endif | |
3662 | #ifdef SIGSYS | |
3663 | handle_signal ("SIGSYS", SIGSYS); | |
3664 | #endif | |
3665 | #ifdef SIGPIPE | |
3666 | handle_signal ("SIGPIPE", SIGPIPE); | |
3667 | #endif | |
3668 | #ifdef SIGALRM | |
3669 | handle_signal ("SIGALRM", SIGALRM); | |
3670 | #endif | |
3671 | #ifdef SIGTERM | |
3672 | handle_signal ("SIGTERM", SIGTERM); | |
3673 | #endif | |
3674 | #ifdef SIGURG | |
3675 | handle_signal ("SIGURG", SIGURG); | |
3676 | #endif | |
3677 | #ifdef SIGSTOP | |
3678 | handle_signal ("SIGSTOP", SIGSTOP); | |
3679 | #endif | |
3680 | #ifdef SIGTSTP | |
3681 | handle_signal ("SIGTSTP", SIGTSTP); | |
3682 | #endif | |
3683 | #ifdef SIGCONT | |
3684 | handle_signal ("SIGCONT", SIGCONT); | |
3685 | #endif | |
3686 | #ifdef SIGCHLD | |
3687 | handle_signal ("SIGCHLD", SIGCHLD); | |
3688 | #endif | |
3689 | #ifdef SIGTTIN | |
3690 | handle_signal ("SIGTTIN", SIGTTIN); | |
3691 | #endif | |
3692 | #ifdef SIGTTOU | |
3693 | handle_signal ("SIGTTOU", SIGTTOU); | |
3694 | #endif | |
3695 | #ifdef SIGIO | |
3696 | handle_signal ("SIGIO", SIGIO); | |
3697 | #endif | |
3698 | #ifdef SIGXCPU | |
3699 | handle_signal ("SIGXCPU", SIGXCPU); | |
3700 | #endif | |
3701 | #ifdef SIGXFSZ | |
3702 | handle_signal ("SIGXFSZ", SIGXFSZ); | |
3703 | #endif | |
3704 | #ifdef SIGVTALRM | |
3705 | handle_signal ("SIGVTALRM", SIGVTALRM); | |
3706 | #endif | |
3707 | #ifdef SIGPROF | |
3708 | handle_signal ("SIGPROF", SIGPROF); | |
3709 | #endif | |
3710 | #ifdef SIGWINCH | |
3711 | handle_signal ("SIGWINCH", SIGWINCH); | |
3712 | #endif | |
3713 | #ifdef SIGINFO | |
3714 | handle_signal ("SIGINFO", SIGINFO); | |
3715 | #endif | |
3716 | #ifdef SIGUSR1 | |
3717 | handle_signal ("SIGUSR1", SIGUSR1); | |
3718 | #endif | |
3719 | #ifdef SIGUSR2 | |
3720 | handle_signal ("SIGUSR2", SIGUSR2); | |
3721 | #endif | |
3722 | else | |
9fa195a2 | 3723 | error ("Undefined signal name %s", name); |
4766242d RS |
3724 | } |
3725 | ||
3726 | #undef handle_signal | |
3727 | ||
4766242d | 3728 | return make_number (kill (XINT (pid), XINT (sigcode))); |
d0d6b7c5 JB |
3729 | } |
3730 | ||
3731 | DEFUN ("process-send-eof", Fprocess_send_eof, Sprocess_send_eof, 0, 1, 0, | |
3732 | "Make PROCESS see end-of-file in its input.\n\ | |
3733 | Eof comes after any text already sent to it.\n\ | |
ebb9e16f | 3734 | PROCESS may be a process, a buffer, the name of a process or buffer, or\n\ |
d33a00f2 RS |
3735 | nil, indicating the current buffer's process.\n\ |
3736 | If PROCESS is a network connection, or is a process communicating\n\ | |
3737 | through a pipe (as opposed to a pty), then you cannot send any more\n\ | |
3738 | text to PROCESS after you call this function.") | |
d0d6b7c5 JB |
3739 | (process) |
3740 | Lisp_Object process; | |
3741 | { | |
3742 | Lisp_Object proc; | |
3743 | ||
3744 | proc = get_process (process); | |
577d03d5 RS |
3745 | |
3746 | /* Make sure the process is really alive. */ | |
3747 | if (! NILP (XPROCESS (proc)->raw_status_low)) | |
3748 | update_status (XPROCESS (proc)); | |
3749 | if (! EQ (XPROCESS (proc)->status, Qrun)) | |
dcf970e6 | 3750 | error ("Process %s not running", XSTRING (XPROCESS (proc)->name)->data); |
577d03d5 | 3751 | |
d0d6b7c5 | 3752 | #ifdef VMS |
4556b700 | 3753 | send_process (proc, "\032", 1, Qnil); /* ^z */ |
d0d6b7c5 JB |
3754 | #else |
3755 | if (!NILP (XPROCESS (proc)->pty_flag)) | |
4556b700 | 3756 | send_process (proc, "\004", 1, Qnil); |
d0d6b7c5 JB |
3757 | else |
3758 | { | |
93853f3d | 3759 | #ifdef HAVE_SHUTDOWN |
02f55c4b RS |
3760 | /* If this is a network connection, or socketpair is used |
3761 | for communication with the subprocess, call shutdown to cause EOF. | |
3762 | (In some old system, shutdown to socketpair doesn't work. | |
3763 | Then we just can't win.) */ | |
3764 | if (NILP (XPROCESS (proc)->pid) | |
3765 | || XINT (XPROCESS (proc)->outfd) == XINT (XPROCESS (proc)->infd)) | |
3766 | shutdown (XINT (XPROCESS (proc)->outfd), 1); | |
3767 | /* In case of socketpair, outfd == infd, so don't close it. */ | |
3768 | if (XINT (XPROCESS (proc)->outfd) != XINT (XPROCESS (proc)->infd)) | |
3769 | close (XINT (XPROCESS (proc)->outfd)); | |
93853f3d RS |
3770 | #else /* not HAVE_SHUTDOWN */ |
3771 | close (XINT (XPROCESS (proc)->outfd)); | |
3772 | #endif /* not HAVE_SHUTDOWN */ | |
1d056e64 | 3773 | XSETINT (XPROCESS (proc)->outfd, open (NULL_DEVICE, O_WRONLY)); |
d0d6b7c5 JB |
3774 | } |
3775 | #endif /* VMS */ | |
d0d6b7c5 JB |
3776 | return process; |
3777 | } | |
3778 | ||
3779 | /* Kill all processes associated with `buffer'. | |
3780 | If `buffer' is nil, kill all processes */ | |
3781 | ||
6b53bb85 | 3782 | void |
d0d6b7c5 JB |
3783 | kill_buffer_processes (buffer) |
3784 | Lisp_Object buffer; | |
3785 | { | |
3786 | Lisp_Object tail, proc; | |
3787 | ||
b5b502d6 | 3788 | for (tail = Vprocess_alist; GC_CONSP (tail); tail = XCONS (tail)->cdr) |
d0d6b7c5 JB |
3789 | { |
3790 | proc = XCONS (XCONS (tail)->car)->cdr; | |
b5b502d6 | 3791 | if (GC_PROCESSP (proc) |
d0d6b7c5 JB |
3792 | && (NILP (buffer) || EQ (XPROCESS (proc)->buffer, buffer))) |
3793 | { | |
3794 | if (NETCONN_P (proc)) | |
e1ab4959 | 3795 | Fdelete_process (proc); |
a9f2c884 | 3796 | else if (XINT (XPROCESS (proc)->infd) >= 0) |
d0d6b7c5 JB |
3797 | process_send_signal (proc, SIGHUP, Qnil, 1); |
3798 | } | |
3799 | } | |
3800 | } | |
3801 | \f | |
3802 | /* On receipt of a signal that a child status has changed, | |
3803 | loop asking about children with changed statuses until | |
3804 | the system says there are no more. | |
3805 | All we do is change the status; | |
3806 | we do not run sentinels or print notifications. | |
3807 | That is saved for the next time keyboard input is done, | |
3808 | in order to avoid timing errors. */ | |
3809 | ||
3810 | /** WARNING: this can be called during garbage collection. | |
3811 | Therefore, it must not be fooled by the presence of mark bits in | |
3812 | Lisp objects. */ | |
3813 | ||
3814 | /** USG WARNING: Although it is not obvious from the documentation | |
3815 | in signal(2), on a USG system the SIGCLD handler MUST NOT call | |
3816 | signal() before executing at least one wait(), otherwise the handler | |
3817 | will be called again, resulting in an infinite loop. The relevant | |
3818 | portion of the documentation reads "SIGCLD signals will be queued | |
3819 | and the signal-catching function will be continually reentered until | |
3820 | the queue is empty". Invoking signal() causes the kernel to reexamine | |
3821 | the SIGCLD queue. Fred Fish, UniSoft Systems Inc. */ | |
3822 | ||
3823 | SIGTYPE | |
3824 | sigchld_handler (signo) | |
3825 | int signo; | |
3826 | { | |
3827 | int old_errno = errno; | |
3828 | Lisp_Object proc; | |
3829 | register struct Lisp_Process *p; | |
6be429b1 | 3830 | extern EMACS_TIME *input_available_clear_time; |
d0d6b7c5 JB |
3831 | |
3832 | #ifdef BSD4_1 | |
3833 | extern int sigheld; | |
3834 | sigheld |= sigbit (SIGCHLD); | |
3835 | #endif | |
3836 | ||
3837 | while (1) | |
3838 | { | |
3839 | register int pid; | |
3840 | WAITTYPE w; | |
3841 | Lisp_Object tail; | |
3842 | ||
3843 | #ifdef WNOHANG | |
3844 | #ifndef WUNTRACED | |
3845 | #define WUNTRACED 0 | |
3846 | #endif /* no WUNTRACED */ | |
3847 | /* Keep trying to get a status until we get a definitive result. */ | |
3848 | do | |
3849 | { | |
3850 | errno = 0; | |
3851 | pid = wait3 (&w, WNOHANG | WUNTRACED, 0); | |
3852 | } | |
3853 | while (pid <= 0 && errno == EINTR); | |
3854 | ||
3855 | if (pid <= 0) | |
3856 | { | |
3857 | /* A real failure. We have done all our job, so return. */ | |
3858 | ||
3859 | /* USG systems forget handlers when they are used; | |
3860 | must reestablish each time */ | |
3c0ee47b | 3861 | #if defined (USG) && !defined (POSIX_SIGNALS) |
d0d6b7c5 JB |
3862 | signal (signo, sigchld_handler); /* WARNING - must come after wait3() */ |
3863 | #endif | |
3864 | #ifdef BSD4_1 | |
3865 | sigheld &= ~sigbit (SIGCHLD); | |
3866 | sigrelse (SIGCHLD); | |
3867 | #endif | |
3868 | errno = old_errno; | |
3869 | return; | |
3870 | } | |
3871 | #else | |
3872 | pid = wait (&w); | |
3873 | #endif /* no WNOHANG */ | |
3874 | ||
3875 | /* Find the process that signaled us, and record its status. */ | |
3876 | ||
3877 | p = 0; | |
7968cc2d | 3878 | for (tail = Vprocess_alist; CONSP (tail); tail = XCONS (tail)->cdr) |
d0d6b7c5 JB |
3879 | { |
3880 | proc = XCONS (XCONS (tail)->car)->cdr; | |
3881 | p = XPROCESS (proc); | |
3882 | if (EQ (p->childp, Qt) && XFASTINT (p->pid) == pid) | |
3883 | break; | |
3884 | p = 0; | |
3885 | } | |
3886 | ||
3887 | /* Look for an asynchronous process whose pid hasn't been filled | |
3888 | in yet. */ | |
3889 | if (p == 0) | |
7968cc2d | 3890 | for (tail = Vprocess_alist; CONSP (tail); tail = XCONS (tail)->cdr) |
d0d6b7c5 JB |
3891 | { |
3892 | proc = XCONS (XCONS (tail)->car)->cdr; | |
3893 | p = XPROCESS (proc); | |
bcd69aea | 3894 | if (INTEGERP (p->pid) && XINT (p->pid) == -1) |
d0d6b7c5 JB |
3895 | break; |
3896 | p = 0; | |
3897 | } | |
3898 | ||
3899 | /* Change the status of the process that was found. */ | |
3900 | if (p != 0) | |
3901 | { | |
3902 | union { int i; WAITTYPE wt; } u; | |
e98d950b | 3903 | int clear_desc_flag = 0; |
d0d6b7c5 JB |
3904 | |
3905 | XSETINT (p->tick, ++process_tick); | |
3906 | u.wt = w; | |
5fc0154c RS |
3907 | XSETINT (p->raw_status_low, u.i & 0xffff); |
3908 | XSETINT (p->raw_status_high, u.i >> 16); | |
d0d6b7c5 JB |
3909 | |
3910 | /* If process has terminated, stop waiting for its output. */ | |
e98d950b RS |
3911 | if ((WIFSIGNALED (w) || WIFEXITED (w)) |
3912 | && XINT (p->infd) >= 0) | |
3913 | clear_desc_flag = 1; | |
3914 | ||
3915 | /* We use clear_desc_flag to avoid a compiler bug in Microsoft C. */ | |
3916 | if (clear_desc_flag) | |
3917 | { | |
3918 | FD_CLR (XINT (p->infd), &input_wait_mask); | |
3919 | FD_CLR (XINT (p->infd), &non_keyboard_wait_mask); | |
3920 | } | |
6be429b1 JB |
3921 | |
3922 | /* Tell wait_reading_process_input that it needs to wake up and | |
3923 | look around. */ | |
3924 | if (input_available_clear_time) | |
3925 | EMACS_SET_SECS_USECS (*input_available_clear_time, 0, 0); | |
d0d6b7c5 JB |
3926 | } |
3927 | ||
3928 | /* There was no asynchronous process found for that id. Check | |
3929 | if we have a synchronous process. */ | |
3930 | else | |
3931 | { | |
3932 | synch_process_alive = 0; | |
3933 | ||
3934 | /* Report the status of the synchronous process. */ | |
3935 | if (WIFEXITED (w)) | |
3936 | synch_process_retcode = WRETCODE (w); | |
3937 | else if (WIFSIGNALED (w)) | |
b97ad9ea RS |
3938 | { |
3939 | int code = WTERMSIG (w); | |
3940 | char *signame = 0; | |
3941 | ||
3942 | if (code < NSIG) | |
3943 | { | |
b0310da4 | 3944 | #ifndef VMS |
ed0cae05 RS |
3945 | /* Suppress warning if the table has const char *. */ |
3946 | signame = (char *) sys_siglist[code]; | |
b0310da4 | 3947 | #else |
b97ad9ea | 3948 | signame = sys_errlist[code]; |
b0310da4 | 3949 | #endif |
b97ad9ea RS |
3950 | } |
3951 | if (signame == 0) | |
3952 | signame = "unknown"; | |
3953 | ||
3954 | synch_process_death = signame; | |
3955 | } | |
6be429b1 JB |
3956 | |
3957 | /* Tell wait_reading_process_input that it needs to wake up and | |
3958 | look around. */ | |
3959 | if (input_available_clear_time) | |
3960 | EMACS_SET_SECS_USECS (*input_available_clear_time, 0, 0); | |
d0d6b7c5 JB |
3961 | } |
3962 | ||
3963 | /* On some systems, we must return right away. | |
3964 | If any more processes want to signal us, we will | |
3965 | get another signal. | |
3966 | Otherwise (on systems that have WNOHANG), loop around | |
3967 | to use up all the processes that have something to tell us. */ | |
e98d950b | 3968 | #if defined (USG) && ! (defined (HPUX) && defined (WNOHANG)) || defined (WINDOWSNT) |
3c0ee47b | 3969 | #if defined (USG) && ! defined (POSIX_SIGNALS) |
d0d6b7c5 JB |
3970 | signal (signo, sigchld_handler); |
3971 | #endif | |
3972 | errno = old_errno; | |
3973 | return; | |
3974 | #endif /* USG, but not HPUX with WNOHANG */ | |
3975 | } | |
3976 | } | |
3977 | \f | |
3978 | ||
3979 | static Lisp_Object | |
3980 | exec_sentinel_unwind (data) | |
3981 | Lisp_Object data; | |
3982 | { | |
3983 | XPROCESS (XCONS (data)->car)->sentinel = XCONS (data)->cdr; | |
3984 | return Qnil; | |
3985 | } | |
3986 | ||
3b9a3dfa RS |
3987 | static Lisp_Object |
3988 | exec_sentinel_error_handler (error) | |
3989 | Lisp_Object error; | |
3990 | { | |
3991 | cmd_error_internal (error, "error in process sentinel: "); | |
3992 | Vinhibit_quit = Qt; | |
3993 | update_echo_area (); | |
833ba342 | 3994 | Fsleep_for (make_number (2), Qnil); |
3b9a3dfa RS |
3995 | } |
3996 | ||
d0d6b7c5 JB |
3997 | static void |
3998 | exec_sentinel (proc, reason) | |
3999 | Lisp_Object proc, reason; | |
4000 | { | |
dfc21838 | 4001 | Lisp_Object sentinel, obuffer, odeactivate, okeymap; |
d0d6b7c5 JB |
4002 | register struct Lisp_Process *p = XPROCESS (proc); |
4003 | int count = specpdl_ptr - specpdl; | |
4da2f5be | 4004 | int outer_running_asynch_code = running_asynch_code; |
d0d6b7c5 | 4005 | |
dfc21838 RS |
4006 | /* No need to gcpro these, because all we do with them later |
4007 | is test them for EQness, and none of them should be a string. */ | |
8fb3cf64 | 4008 | odeactivate = Vdeactivate_mark; |
dfc21838 RS |
4009 | XSETBUFFER (obuffer, current_buffer); |
4010 | okeymap = current_buffer->keymap; | |
4011 | ||
d0d6b7c5 JB |
4012 | sentinel = p->sentinel; |
4013 | if (NILP (sentinel)) | |
4014 | return; | |
4015 | ||
4016 | /* Zilch the sentinel while it's running, to avoid recursive invocations; | |
4017 | assure that it gets restored no matter how the sentinel exits. */ | |
4018 | p->sentinel = Qnil; | |
4019 | record_unwind_protect (exec_sentinel_unwind, Fcons (proc, sentinel)); | |
4020 | /* Inhibit quit so that random quits don't screw up a running filter. */ | |
4021 | specbind (Qinhibit_quit, Qt); | |
6545aada | 4022 | specbind (Qlast_nonmenu_event, Qt); |
3b9a3dfa | 4023 | |
4da2f5be RS |
4024 | /* In case we get recursively called, |
4025 | and we already saved the match data nonrecursively, | |
4026 | save the same match data in safely recursive fashion. */ | |
4027 | if (outer_running_asynch_code) | |
4028 | { | |
4029 | Lisp_Object tem; | |
dd130227 | 4030 | tem = Fmatch_data (Qnil, Qnil); |
4da2f5be | 4031 | restore_match_data (); |
dd130227 | 4032 | record_unwind_protect (Fstore_match_data, Fmatch_data (Qnil, Qnil)); |
4da2f5be RS |
4033 | Fstore_match_data (tem); |
4034 | } | |
4035 | ||
4036 | /* For speed, if a search happens within this code, | |
4037 | save the match data in a special nonrecursive fashion. */ | |
7074fde6 | 4038 | running_asynch_code = 1; |
4da2f5be | 4039 | |
3b9a3dfa RS |
4040 | internal_condition_case_1 (read_process_output_call, |
4041 | Fcons (sentinel, | |
4042 | Fcons (proc, Fcons (reason, Qnil))), | |
4043 | !NILP (Vdebug_on_error) ? Qnil : Qerror, | |
4044 | exec_sentinel_error_handler); | |
4da2f5be RS |
4045 | |
4046 | /* If we saved the match data nonrecursively, restore it now. */ | |
7074fde6 | 4047 | restore_match_data (); |
4da2f5be | 4048 | running_asynch_code = outer_running_asynch_code; |
8fb3cf64 KH |
4049 | |
4050 | Vdeactivate_mark = odeactivate; | |
7973cfa8 | 4051 | #if 0 |
dfc21838 RS |
4052 | if (! EQ (Fcurrent_buffer (), obuffer) |
4053 | || ! EQ (current_buffer->keymap, okeymap)) | |
7973cfa8 | 4054 | #endif |
927e08be RS |
4055 | /* But do it only if the caller is actually going to read events. |
4056 | Otherwise there's no need to make him wake up, and it could | |
4057 | cause trouble (for example it would make Fsit_for return). */ | |
4058 | if (waiting_for_user_input_p == -1) | |
4059 | record_asynch_buffer_change (); | |
8fb3cf64 | 4060 | |
2ea6d561 | 4061 | unbind_to (count, Qnil); |
d0d6b7c5 JB |
4062 | } |
4063 | ||
4064 | /* Report all recent events of a change in process status | |
4065 | (either run the sentinel or output a message). | |
4066 | This is done while Emacs is waiting for keyboard input. */ | |
4067 | ||
6b53bb85 | 4068 | void |
d0d6b7c5 JB |
4069 | status_notify () |
4070 | { | |
4071 | register Lisp_Object proc, buffer; | |
2e4149a8 | 4072 | Lisp_Object tail, msg; |
d0d6b7c5 JB |
4073 | struct gcpro gcpro1, gcpro2; |
4074 | ||
2e4149a8 KH |
4075 | tail = Qnil; |
4076 | msg = Qnil; | |
d0d6b7c5 JB |
4077 | /* We need to gcpro tail; if read_process_output calls a filter |
4078 | which deletes a process and removes the cons to which tail points | |
4079 | from Vprocess_alist, and then causes a GC, tail is an unprotected | |
4080 | reference. */ | |
4081 | GCPRO2 (tail, msg); | |
4082 | ||
30623085 RS |
4083 | /* Set this now, so that if new processes are created by sentinels |
4084 | that we run, we get called again to handle their status changes. */ | |
4085 | update_tick = process_tick; | |
4086 | ||
4087 | for (tail = Vprocess_alist; !NILP (tail); tail = Fcdr (tail)) | |
d0d6b7c5 | 4088 | { |
30623085 RS |
4089 | Lisp_Object symbol; |
4090 | register struct Lisp_Process *p; | |
4091 | ||
4092 | proc = Fcdr (Fcar (tail)); | |
4093 | p = XPROCESS (proc); | |
4094 | ||
4095 | if (XINT (p->tick) != XINT (p->update_tick)) | |
d0d6b7c5 | 4096 | { |
30623085 | 4097 | XSETINT (p->update_tick, XINT (p->tick)); |
d0d6b7c5 | 4098 | |
30623085 | 4099 | /* If process is still active, read any output that remains. */ |
4da2f5be RS |
4100 | while (! EQ (p->filter, Qt) |
4101 | && XINT (p->infd) >= 0 | |
4102 | && read_process_output (proc, XINT (p->infd)) > 0); | |
d0d6b7c5 | 4103 | |
30623085 | 4104 | buffer = p->buffer; |
d0d6b7c5 | 4105 | |
30623085 RS |
4106 | /* Get the text to use for the message. */ |
4107 | if (!NILP (p->raw_status_low)) | |
4108 | update_status (p); | |
4109 | msg = status_message (p->status); | |
d0d6b7c5 | 4110 | |
30623085 RS |
4111 | /* If process is terminated, deactivate it or delete it. */ |
4112 | symbol = p->status; | |
4113 | if (CONSP (p->status)) | |
4114 | symbol = XCONS (p->status)->car; | |
d0d6b7c5 | 4115 | |
30623085 RS |
4116 | if (EQ (symbol, Qsignal) || EQ (symbol, Qexit) |
4117 | || EQ (symbol, Qclosed)) | |
4118 | { | |
4119 | if (delete_exited_processes) | |
4120 | remove_process (proc); | |
4121 | else | |
4122 | deactivate_process (proc); | |
4123 | } | |
d0d6b7c5 | 4124 | |
0ad61fe7 RS |
4125 | /* The actions above may have further incremented p->tick. |
4126 | So set p->update_tick again | |
4127 | so that an error in the sentinel will not cause | |
4128 | this code to be run again. */ | |
4129 | XSETINT (p->update_tick, XINT (p->tick)); | |
30623085 RS |
4130 | /* Now output the message suitably. */ |
4131 | if (!NILP (p->sentinel)) | |
4132 | exec_sentinel (proc, msg); | |
4133 | /* Don't bother with a message in the buffer | |
4134 | when a process becomes runnable. */ | |
4135 | else if (!EQ (symbol, Qrun) && !NILP (buffer)) | |
4136 | { | |
4137 | Lisp_Object ro, tem; | |
4138 | struct buffer *old = current_buffer; | |
d8a2934e RS |
4139 | int opoint, opoint_byte; |
4140 | int before, before_byte; | |
2e4149a8 | 4141 | |
30623085 | 4142 | ro = XBUFFER (buffer)->read_only; |
d0d6b7c5 | 4143 | |
30623085 RS |
4144 | /* Avoid error if buffer is deleted |
4145 | (probably that's why the process is dead, too) */ | |
4146 | if (NILP (XBUFFER (buffer)->name)) | |
4147 | continue; | |
4148 | Fset_buffer (buffer); | |
12ca5cdf | 4149 | |
6ec8bbd2 | 4150 | opoint = PT; |
d8a2934e | 4151 | opoint_byte = PT_BYTE; |
30623085 RS |
4152 | /* Insert new output into buffer |
4153 | at the current end-of-output marker, | |
4154 | thus preserving logical ordering of input and output. */ | |
4155 | if (XMARKER (p->mark)->buffer) | |
d8a2934e | 4156 | Fgoto_char (p->mark); |
30623085 | 4157 | else |
d8a2934e | 4158 | SET_PT_BOTH (ZV, ZV_BYTE); |
12ca5cdf RS |
4159 | |
4160 | before = PT; | |
d8a2934e | 4161 | before_byte = PT_BYTE; |
30623085 RS |
4162 | |
4163 | tem = current_buffer->read_only; | |
4164 | current_buffer->read_only = Qnil; | |
4165 | insert_string ("\nProcess "); | |
4166 | Finsert (1, &p->name); | |
4167 | insert_string (" "); | |
4168 | Finsert (1, &msg); | |
4169 | current_buffer->read_only = tem; | |
d8a2934e | 4170 | set_marker_both (p->mark, p->buffer, PT, PT_BYTE); |
30623085 | 4171 | |
12ca5cdf | 4172 | if (opoint >= before) |
d8a2934e RS |
4173 | SET_PT_BOTH (opoint + (PT - before), |
4174 | opoint_byte + (PT_BYTE - before_byte)); | |
12ca5cdf | 4175 | else |
d8a2934e | 4176 | SET_PT_BOTH (opoint, opoint_byte); |
12ca5cdf | 4177 | |
30623085 | 4178 | set_buffer_internal (old); |
d0d6b7c5 | 4179 | } |
30623085 RS |
4180 | } |
4181 | } /* end for */ | |
d0d6b7c5 JB |
4182 | |
4183 | update_mode_lines++; /* in case buffers use %s in mode-line-format */ | |
4184 | redisplay_preserve_echo_area (); | |
4185 | ||
d0d6b7c5 JB |
4186 | UNGCPRO; |
4187 | } | |
0fa1789e KH |
4188 | |
4189 | \f | |
4190 | DEFUN ("set-process-coding-system", Fset_process_coding_system, | |
4191 | Sset_process_coding_system, 1, 3, 0, | |
a95c35f6 | 4192 | "Set coding systems of PROCESS to DECODING (input from the process) and\n\ |
0fa1789e KH |
4193 | ENCODING (output to the process).") |
4194 | (proc, decoding, encoding) | |
4195 | register Lisp_Object proc, decoding, encoding; | |
4196 | { | |
4197 | register struct Lisp_Process *p; | |
4198 | ||
4199 | CHECK_PROCESS (proc, 0); | |
4200 | p = XPROCESS (proc); | |
4201 | if (XINT (p->infd) < 0) | |
4202 | error ("Input file descriptor of %s closed", XSTRING (p->name)->data); | |
4203 | if (XINT (p->outfd) < 0) | |
4204 | error ("Output file descriptor of %s closed", XSTRING (p->name)->data); | |
4205 | ||
4206 | p->decode_coding_system = Fcheck_coding_system (decoding); | |
4207 | p->encode_coding_system = Fcheck_coding_system (encoding); | |
4208 | setup_coding_system (decoding, | |
c7580538 | 4209 | proc_decode_coding_system[XINT (p->infd)]); |
0fa1789e | 4210 | setup_coding_system (encoding, |
c7580538 | 4211 | proc_encode_coding_system[XINT (p->outfd)]); |
0fa1789e KH |
4212 | |
4213 | return Qnil; | |
4214 | } | |
4215 | ||
4216 | DEFUN ("process-coding-system", | |
4217 | Fprocess_coding_system, Sprocess_coding_system, 1, 1, 0, | |
a95c35f6 | 4218 | "Return a cons of coding systems for decoding and encoding of PROCESS.") |
0fa1789e KH |
4219 | (proc) |
4220 | register Lisp_Object proc; | |
4221 | { | |
4222 | CHECK_PROCESS (proc, 0); | |
4223 | return Fcons (XPROCESS (proc)->decode_coding_system, | |
4224 | XPROCESS (proc)->encode_coding_system); | |
4225 | } | |
d0d6b7c5 | 4226 | \f |
a69281ff RS |
4227 | /* The first time this is called, assume keyboard input comes from DESC |
4228 | instead of from where we used to expect it. | |
4229 | Subsequent calls mean assume input keyboard can come from DESC | |
4230 | in addition to other places. */ | |
4231 | ||
4232 | static int add_keyboard_wait_descriptor_called_flag; | |
4233 | ||
4234 | void | |
4235 | add_keyboard_wait_descriptor (desc) | |
4236 | int desc; | |
4237 | { | |
4238 | if (! add_keyboard_wait_descriptor_called_flag) | |
4239 | FD_CLR (0, &input_wait_mask); | |
4240 | add_keyboard_wait_descriptor_called_flag = 1; | |
4241 | FD_SET (desc, &input_wait_mask); | |
b5dc1c83 | 4242 | FD_SET (desc, &non_process_wait_mask); |
a69281ff RS |
4243 | if (desc > max_keyboard_desc) |
4244 | max_keyboard_desc = desc; | |
4245 | } | |
4246 | ||
4247 | /* From now on, do not expect DESC to give keyboard input. */ | |
4248 | ||
4249 | void | |
4250 | delete_keyboard_wait_descriptor (desc) | |
4251 | int desc; | |
4252 | { | |
4253 | int fd; | |
4254 | int lim = max_keyboard_desc; | |
4255 | ||
4256 | FD_CLR (desc, &input_wait_mask); | |
b5dc1c83 | 4257 | FD_CLR (desc, &non_process_wait_mask); |
a69281ff RS |
4258 | |
4259 | if (desc == max_keyboard_desc) | |
4260 | for (fd = 0; fd < lim; fd++) | |
4261 | if (FD_ISSET (fd, &input_wait_mask) | |
4262 | && !FD_ISSET (fd, &non_keyboard_wait_mask)) | |
4263 | max_keyboard_desc = fd; | |
4264 | } | |
4265 | ||
4266 | /* Return nonzero if *MASK has a bit set | |
4267 | that corresponds to one of the keyboard input descriptors. */ | |
4268 | ||
4269 | int | |
4270 | keyboard_bit_set (mask) | |
4271 | SELECT_TYPE *mask; | |
4272 | { | |
4273 | int fd; | |
4274 | ||
ee8e09af | 4275 | for (fd = 0; fd <= max_keyboard_desc; fd++) |
a69281ff RS |
4276 | if (FD_ISSET (fd, mask) && FD_ISSET (fd, &input_wait_mask) |
4277 | && !FD_ISSET (fd, &non_keyboard_wait_mask)) | |
4278 | return 1; | |
4279 | ||
4280 | return 0; | |
4281 | } | |
4282 | \f | |
d0d6b7c5 JB |
4283 | init_process () |
4284 | { | |
4285 | register int i; | |
4286 | ||
4287 | #ifdef SIGCHLD | |
4288 | #ifndef CANNOT_DUMP | |
4289 | if (! noninteractive || initialized) | |
4290 | #endif | |
4291 | signal (SIGCHLD, sigchld_handler); | |
4292 | #endif | |
4293 | ||
4294 | FD_ZERO (&input_wait_mask); | |
a69281ff | 4295 | FD_ZERO (&non_keyboard_wait_mask); |
b5dc1c83 | 4296 | FD_ZERO (&non_process_wait_mask); |
7d0e672e | 4297 | max_process_desc = 0; |
dd2281ae | 4298 | |
a69281ff | 4299 | FD_SET (0, &input_wait_mask); |
dd2281ae | 4300 | |
d0d6b7c5 JB |
4301 | Vprocess_alist = Qnil; |
4302 | for (i = 0; i < MAXDESC; i++) | |
4303 | { | |
4304 | chan_process[i] = Qnil; | |
4305 | proc_buffered_char[i] = -1; | |
4306 | } | |
c7580538 KH |
4307 | bzero (proc_decode_coding_system, sizeof proc_decode_coding_system); |
4308 | bzero (proc_encode_coding_system, sizeof proc_encode_coding_system); | |
d0d6b7c5 | 4309 | } |
312c9964 | 4310 | |
d0d6b7c5 JB |
4311 | syms_of_process () |
4312 | { | |
d0d6b7c5 JB |
4313 | Qprocessp = intern ("processp"); |
4314 | staticpro (&Qprocessp); | |
4315 | Qrun = intern ("run"); | |
4316 | staticpro (&Qrun); | |
4317 | Qstop = intern ("stop"); | |
4318 | staticpro (&Qstop); | |
4319 | Qsignal = intern ("signal"); | |
4320 | staticpro (&Qsignal); | |
4321 | ||
4322 | /* Qexit is already staticpro'd by syms_of_eval; don't staticpro it | |
4323 | here again. | |
4324 | ||
4325 | Qexit = intern ("exit"); | |
4326 | staticpro (&Qexit); */ | |
4327 | ||
4328 | Qopen = intern ("open"); | |
4329 | staticpro (&Qopen); | |
4330 | Qclosed = intern ("closed"); | |
4331 | staticpro (&Qclosed); | |
4332 | ||
6545aada RS |
4333 | Qlast_nonmenu_event = intern ("last-nonmenu-event"); |
4334 | staticpro (&Qlast_nonmenu_event); | |
4335 | ||
d0d6b7c5 JB |
4336 | staticpro (&Vprocess_alist); |
4337 | ||
4338 | DEFVAR_BOOL ("delete-exited-processes", &delete_exited_processes, | |
4339 | "*Non-nil means delete processes immediately when they exit.\n\ | |
4340 | nil means don't delete them until `list-processes' is run."); | |
4341 | ||
4342 | delete_exited_processes = 1; | |
4343 | ||
4344 | DEFVAR_LISP ("process-connection-type", &Vprocess_connection_type, | |
4345 | "Control type of device used to communicate with subprocesses.\n\ | |
e333e864 RS |
4346 | Values are nil to use a pipe, or t or `pty' to use a pty.\n\ |
4347 | The value has no effect if the system has no ptys or if all ptys are busy:\n\ | |
4348 | then a pipe is used in any case.\n\ | |
4349 | The value takes effect when `start-process' is called."); | |
d0d6b7c5 JB |
4350 | Vprocess_connection_type = Qt; |
4351 | ||
4352 | defsubr (&Sprocessp); | |
4353 | defsubr (&Sget_process); | |
4354 | defsubr (&Sget_buffer_process); | |
4355 | defsubr (&Sdelete_process); | |
4356 | defsubr (&Sprocess_status); | |
4357 | defsubr (&Sprocess_exit_status); | |
4358 | defsubr (&Sprocess_id); | |
4359 | defsubr (&Sprocess_name); | |
3b9a3dfa | 4360 | defsubr (&Sprocess_tty_name); |
d0d6b7c5 JB |
4361 | defsubr (&Sprocess_command); |
4362 | defsubr (&Sset_process_buffer); | |
4363 | defsubr (&Sprocess_buffer); | |
4364 | defsubr (&Sprocess_mark); | |
4365 | defsubr (&Sset_process_filter); | |
4366 | defsubr (&Sprocess_filter); | |
4367 | defsubr (&Sset_process_sentinel); | |
4368 | defsubr (&Sprocess_sentinel); | |
de282a05 | 4369 | defsubr (&Sset_process_window_size); |
d0d6b7c5 | 4370 | defsubr (&Sprocess_kill_without_query); |
de282a05 | 4371 | defsubr (&Sprocess_contact); |
d0d6b7c5 JB |
4372 | defsubr (&Slist_processes); |
4373 | defsubr (&Sprocess_list); | |
4374 | defsubr (&Sstart_process); | |
4375 | #ifdef HAVE_SOCKETS | |
4376 | defsubr (&Sopen_network_stream); | |
4377 | #endif /* HAVE_SOCKETS */ | |
4378 | defsubr (&Saccept_process_output); | |
4379 | defsubr (&Sprocess_send_region); | |
4380 | defsubr (&Sprocess_send_string); | |
4381 | defsubr (&Sinterrupt_process); | |
4382 | defsubr (&Skill_process); | |
4383 | defsubr (&Squit_process); | |
4384 | defsubr (&Sstop_process); | |
4385 | defsubr (&Scontinue_process); | |
4386 | defsubr (&Sprocess_send_eof); | |
4387 | defsubr (&Ssignal_process); | |
4388 | defsubr (&Swaiting_for_user_input_p); | |
4389 | /* defsubr (&Sprocess_connection); */ | |
0fa1789e KH |
4390 | defsubr (&Sset_process_coding_system); |
4391 | defsubr (&Sprocess_coding_system); | |
d0d6b7c5 JB |
4392 | } |
4393 | ||
6720a7fb JB |
4394 | \f |
4395 | #else /* not subprocesses */ | |
4396 | ||
4397 | #include <sys/types.h> | |
4398 | #include <errno.h> | |
4399 | ||
4400 | #include "lisp.h" | |
4401 | #include "systime.h" | |
4402 | #include "termopts.h" | |
81afb6d1 | 4403 | #include "sysselect.h" |
6720a7fb | 4404 | |
ff11dfa1 | 4405 | extern int frame_garbaged; |
6720a7fb | 4406 | |
f694e5d2 KH |
4407 | extern EMACS_TIME timer_check (); |
4408 | extern int timers_run; | |
6720a7fb JB |
4409 | |
4410 | /* As described above, except assuming that there are no subprocesses: | |
4411 | ||
4412 | Wait for timeout to elapse and/or keyboard input to be available. | |
4413 | ||
4414 | time_limit is: | |
4415 | timeout in seconds, or | |
4416 | zero for no limit, or | |
4417 | -1 means gobble data immediately available but don't wait for any. | |
4418 | ||
f76475ad | 4419 | read_kbd is a Lisp_Object: |
6720a7fb JB |
4420 | 0 to ignore keyboard input, or |
4421 | 1 to return when input is available, or | |
4422 | -1 means caller will actually read the input, so don't throw to | |
4423 | the quit handler. | |
0a65b032 RS |
4424 | a cons cell, meaning wait until its car is non-nil |
4425 | (and gobble terminal input into the buffer if any arrives), or | |
6720a7fb JB |
4426 | We know that read_kbd will never be a Lisp_Process, since |
4427 | `subprocesses' isn't defined. | |
4428 | ||
4429 | do_display != 0 means redisplay should be done to show subprocess | |
5164ee8e | 4430 | output that arrives. |
6720a7fb | 4431 | |
eb8c3be9 | 4432 | Return true iff we received input from any process. */ |
6720a7fb JB |
4433 | |
4434 | int | |
4435 | wait_reading_process_input (time_limit, microsecs, read_kbd, do_display) | |
f76475ad JB |
4436 | int time_limit, microsecs; |
4437 | Lisp_Object read_kbd; | |
4438 | int do_display; | |
6720a7fb | 4439 | { |
f694e5d2 | 4440 | EMACS_TIME end_time, timeout; |
8db121c4 | 4441 | SELECT_TYPE waitchannels; |
f694e5d2 | 4442 | int xerrno; |
0a65b032 RS |
4443 | Lisp_Object *wait_for_cell = 0; |
4444 | ||
4445 | /* If waiting for non-nil in a cell, record where. */ | |
4446 | if (CONSP (read_kbd)) | |
4447 | { | |
4448 | wait_for_cell = &XCONS (read_kbd)->car; | |
4449 | XSETFASTINT (read_kbd, 0); | |
4450 | } | |
6720a7fb JB |
4451 | |
4452 | /* What does time_limit really mean? */ | |
4453 | if (time_limit || microsecs) | |
4454 | { | |
6720a7fb JB |
4455 | if (time_limit == -1) |
4456 | /* In fact, it's zero. */ | |
4457 | EMACS_SET_SECS_USECS (timeout, 0, 0); | |
4458 | else | |
4459 | EMACS_SET_SECS_USECS (timeout, time_limit, microsecs); | |
4460 | ||
4461 | /* How far in the future is that? */ | |
4462 | EMACS_GET_TIME (end_time); | |
4463 | EMACS_ADD_TIME (end_time, end_time, timeout); | |
4464 | } | |
4465 | else | |
4466 | /* It's infinite. */ | |
f694e5d2 | 4467 | EMACS_SET_SECS_USECS (timeout, 100000, 0); |
6720a7fb JB |
4468 | |
4469 | /* Turn off periodic alarms (in case they are in use) | |
4470 | because the select emulator uses alarms. */ | |
4471 | stop_polling (); | |
4472 | ||
4473 | for (;;) | |
4474 | { | |
4475 | int nfds; | |
bae8d137 | 4476 | int timeout_reduced_for_timers = 0; |
6720a7fb | 4477 | |
6720a7fb JB |
4478 | /* If calling from keyboard input, do not quit |
4479 | since we want to return C-g as an input character. | |
4480 | Otherwise, do pending quit if requested. */ | |
f76475ad | 4481 | if (XINT (read_kbd) >= 0) |
6720a7fb JB |
4482 | QUIT; |
4483 | ||
0a65b032 RS |
4484 | /* Exit now if the cell we're waiting for became non-nil. */ |
4485 | if (wait_for_cell && ! NILP (*wait_for_cell)) | |
4486 | break; | |
4487 | ||
bae8d137 RS |
4488 | /* Compute time from now till when time limit is up */ |
4489 | /* Exit if already run out */ | |
f694e5d2 | 4490 | if (time_limit > 0 || microsecs) |
6720a7fb | 4491 | { |
f694e5d2 KH |
4492 | EMACS_GET_TIME (timeout); |
4493 | EMACS_SUB_TIME (timeout, end_time, timeout); | |
4494 | if (EMACS_TIME_NEG_P (timeout)) | |
6720a7fb JB |
4495 | break; |
4496 | } | |
4497 | ||
bae8d137 RS |
4498 | /* If our caller will not immediately handle keyboard events, |
4499 | run timer events directly. | |
4500 | (Callers that will immediately read keyboard events | |
4501 | call timer_delay on their own.) */ | |
f854a00b | 4502 | if (! wait_for_cell) |
bae8d137 RS |
4503 | { |
4504 | EMACS_TIME timer_delay; | |
0a65b032 RS |
4505 | int old_timers_run; |
4506 | ||
4507 | retry: | |
4508 | old_timers_run = timers_run; | |
bae8d137 RS |
4509 | timer_delay = timer_check (1); |
4510 | if (timers_run != old_timers_run && do_display) | |
0a65b032 RS |
4511 | { |
4512 | redisplay_preserve_echo_area (); | |
4513 | /* We must retry, since a timer may have requeued itself | |
4514 | and that could alter the time delay. */ | |
4515 | goto retry; | |
4516 | } | |
4517 | ||
f694e5d2 | 4518 | if (! EMACS_TIME_NEG_P (timer_delay) && time_limit != -1) |
bae8d137 RS |
4519 | { |
4520 | EMACS_TIME difference; | |
f694e5d2 | 4521 | EMACS_SUB_TIME (difference, timer_delay, timeout); |
bae8d137 RS |
4522 | if (EMACS_TIME_NEG_P (difference)) |
4523 | { | |
f694e5d2 | 4524 | timeout = timer_delay; |
bae8d137 RS |
4525 | timeout_reduced_for_timers = 1; |
4526 | } | |
4527 | } | |
4528 | } | |
4529 | ||
6720a7fb JB |
4530 | /* Cause C-g and alarm signals to take immediate action, |
4531 | and cause input available signals to zero out timeout. */ | |
f76475ad | 4532 | if (XINT (read_kbd) < 0) |
6720a7fb JB |
4533 | set_waiting_for_input (&timeout); |
4534 | ||
0a65b032 RS |
4535 | /* Wait till there is something to do. */ |
4536 | ||
4537 | if (! XINT (read_kbd) && wait_for_cell == 0) | |
4538 | FD_ZERO (&waitchannels); | |
4539 | else | |
4540 | FD_SET (0, &waitchannels); | |
4541 | ||
ff11dfa1 | 4542 | /* If a frame has been newly mapped and needs updating, |
6720a7fb | 4543 | reprocess its display stuff. */ |
5164ee8e | 4544 | if (frame_garbaged && do_display) |
0a65b032 RS |
4545 | { |
4546 | clear_waiting_for_input (); | |
4547 | redisplay_preserve_echo_area (); | |
4548 | if (XINT (read_kbd) < 0) | |
4549 | set_waiting_for_input (&timeout); | |
4550 | } | |
6720a7fb | 4551 | |
1861b214 RS |
4552 | if (XINT (read_kbd) && detect_input_pending ()) |
4553 | { | |
4554 | nfds = 0; | |
4555 | FD_ZERO (&waitchannels); | |
4556 | } | |
4557 | else | |
4558 | nfds = select (1, &waitchannels, (SELECT_TYPE *)0, (SELECT_TYPE *)0, | |
4559 | &timeout); | |
f694e5d2 KH |
4560 | |
4561 | xerrno = errno; | |
6720a7fb JB |
4562 | |
4563 | /* Make C-g and alarm signals set flags again */ | |
4564 | clear_waiting_for_input (); | |
4565 | ||
4566 | /* If we woke up due to SIGWINCH, actually change size now. */ | |
4567 | do_pending_window_change (); | |
4568 | ||
f694e5d2 KH |
4569 | if (time_limit && nfds == 0 && ! timeout_reduced_for_timers) |
4570 | /* We waited the full specified time, so return now. */ | |
4571 | break; | |
4572 | ||
6720a7fb JB |
4573 | if (nfds == -1) |
4574 | { | |
4575 | /* If the system call was interrupted, then go around the | |
4576 | loop again. */ | |
f694e5d2 | 4577 | if (xerrno == EINTR) |
8db121c4 | 4578 | FD_ZERO (&waitchannels); |
f694e5d2 KH |
4579 | else |
4580 | error ("select error: %s", strerror (xerrno)); | |
6720a7fb JB |
4581 | } |
4582 | #ifdef sun | |
4583 | else if (nfds > 0 && (waitchannels & 1) && interrupt_input) | |
4584 | /* System sometimes fails to deliver SIGIO. */ | |
4585 | kill (getpid (), SIGIO); | |
4586 | #endif | |
7324d660 | 4587 | #ifdef SIGIO |
f76475ad | 4588 | if (XINT (read_kbd) && interrupt_input && (waitchannels & 1)) |
e643c5be | 4589 | kill (getpid (), SIGIO); |
7324d660 | 4590 | #endif |
6720a7fb | 4591 | |
f694e5d2 KH |
4592 | /* Check for keyboard input */ |
4593 | ||
f854a00b | 4594 | if ((XINT (read_kbd) != 0) |
f694e5d2 KH |
4595 | && detect_input_pending_run_timers (do_display)) |
4596 | { | |
4597 | swallow_events (do_display); | |
4598 | if (detect_input_pending_run_timers (do_display)) | |
4599 | break; | |
4600 | } | |
0a65b032 | 4601 | |
f854a00b RS |
4602 | /* If wait_for_cell. check for keyboard input |
4603 | but don't run any timers. | |
4604 | ??? (It seems wrong to me to check for keyboard | |
4605 | input at all when wait_for_cell, but the code | |
4606 | has been this way since July 1994. | |
4607 | Try changing this after version 19.31.) */ | |
4608 | if (wait_for_cell | |
4609 | && detect_input_pending ()) | |
4610 | { | |
4611 | swallow_events (do_display); | |
4612 | if (detect_input_pending ()) | |
4613 | break; | |
4614 | } | |
4615 | ||
0a65b032 RS |
4616 | /* Exit now if the cell we're waiting for became non-nil. */ |
4617 | if (wait_for_cell && ! NILP (*wait_for_cell)) | |
4618 | break; | |
6720a7fb JB |
4619 | } |
4620 | ||
a87b802f JB |
4621 | start_polling (); |
4622 | ||
6720a7fb JB |
4623 | return 0; |
4624 | } | |
4625 | ||
4626 | ||
4627 | DEFUN ("get-buffer-process", Fget_buffer_process, Sget_buffer_process, 1, 1, 0, | |
51ab806a | 4628 | /* Don't confuse make-docfile by having two doc strings for this function. |
312c9964 RS |
4629 | make-docfile does not pay attention to #if, for good reason! */ |
4630 | 0) | |
6720a7fb JB |
4631 | (name) |
4632 | register Lisp_Object name; | |
4633 | { | |
4634 | return Qnil; | |
4635 | } | |
4636 | ||
4637 | /* Kill all processes associated with `buffer'. | |
4638 | If `buffer' is nil, kill all processes. | |
4639 | Since we have no subprocesses, this does nothing. */ | |
4640 | ||
4641 | kill_buffer_processes (buffer) | |
4642 | Lisp_Object buffer; | |
4643 | { | |
4644 | } | |
4645 | ||
4646 | init_process () | |
4647 | { | |
4648 | } | |
4649 | ||
4650 | syms_of_process () | |
4651 | { | |
4652 | defsubr (&Sget_buffer_process); | |
4653 | } | |
4654 | ||
4655 | \f | |
4656 | #endif /* not subprocesses */ |