Commit | Line | Data |
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d0d6b7c5 | 1 | /* Asynchronous subprocess control for GNU Emacs. |
03832893 RS |
2 | Copyright (C) 1985, 86, 87, 88, 93, 94, 95, 1996 |
3 | Free Software Foundation, Inc. | |
d0d6b7c5 JB |
4 | |
5 | This file is part of GNU Emacs. | |
6 | ||
7 | GNU Emacs is free software; you can redistribute it and/or modify | |
8 | it under the terms of the GNU General Public License as published by | |
1dc77cc3 | 9 | the Free Software Foundation; either version 2, or (at your option) |
d0d6b7c5 JB |
10 | any later version. |
11 | ||
12 | GNU Emacs is distributed in the hope that it will be useful, | |
13 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
15 | GNU General Public License for more details. | |
16 | ||
17 | You should have received a copy of the GNU General Public License | |
18 | along with GNU Emacs; see the file COPYING. If not, write to | |
3b7ad313 EN |
19 | the Free Software Foundation, Inc., 59 Temple Place - Suite 330, |
20 | Boston, MA 02111-1307, USA. */ | |
d0d6b7c5 JB |
21 | |
22 | ||
23 | #include <signal.h> | |
24 | ||
18160b98 | 25 | #include <config.h> |
d0d6b7c5 | 26 | |
6720a7fb JB |
27 | /* This file is split into two parts by the following preprocessor |
28 | conditional. The 'then' clause contains all of the support for | |
29 | asynchronous subprocesses. The 'else' clause contains stub | |
30 | versions of some of the asynchronous subprocess routines that are | |
31 | often called elsewhere in Emacs, so we don't have to #ifdef the | |
32 | sections that call them. */ | |
33 | ||
34 | \f | |
d0d6b7c5 | 35 | #ifdef subprocesses |
d0d6b7c5 JB |
36 | |
37 | #include <stdio.h> | |
38 | #include <errno.h> | |
39 | #include <setjmp.h> | |
40 | #include <sys/types.h> /* some typedefs are used in sys/file.h */ | |
41 | #include <sys/file.h> | |
42 | #include <sys/stat.h> | |
93b4f699 RS |
43 | #ifdef HAVE_UNISTD_H |
44 | #include <unistd.h> | |
45 | #endif | |
d0d6b7c5 | 46 | |
e98d950b RS |
47 | #ifdef WINDOWSNT |
48 | #include <stdlib.h> | |
49 | #include <fcntl.h> | |
50 | #endif /* not WINDOWSNT */ | |
51 | ||
d0d6b7c5 JB |
52 | #ifdef HAVE_SOCKETS /* TCP connection support, if kernel can do it */ |
53 | #include <sys/socket.h> | |
54 | #include <netdb.h> | |
55 | #include <netinet/in.h> | |
56 | #include <arpa/inet.h> | |
f2cfa9a6 RS |
57 | #ifdef NEED_NET_ERRNO_H |
58 | #include <net/errno.h> | |
59 | #endif /* NEED_NET_ERRNO_H */ | |
d0d6b7c5 JB |
60 | #endif /* HAVE_SOCKETS */ |
61 | ||
1d2c16fa RS |
62 | /* TERM is a poor-man's SLIP, used on Linux. */ |
63 | #ifdef TERM | |
64 | #include <client.h> | |
65 | #endif | |
66 | ||
cf32fea0 PR |
67 | /* On some systems, e.g. DGUX, inet_addr returns a 'struct in_addr'. */ |
68 | #ifdef HAVE_BROKEN_INET_ADDR | |
79967d5e RS |
69 | #define IN_ADDR struct in_addr |
70 | #define NUMERIC_ADDR_ERROR (numeric_addr.s_addr == -1) | |
71 | #else | |
72 | #define IN_ADDR unsigned long | |
73 | #define NUMERIC_ADDR_ERROR (numeric_addr == -1) | |
74 | #endif | |
75 | ||
6df54671 | 76 | #if defined(BSD_SYSTEM) || defined(STRIDE) |
d0d6b7c5 | 77 | #include <sys/ioctl.h> |
0ad77c54 | 78 | #if !defined (O_NDELAY) && defined (HAVE_PTYS) && !defined(USG5) |
d0d6b7c5 JB |
79 | #include <fcntl.h> |
80 | #endif /* HAVE_PTYS and no O_NDELAY */ | |
6df54671 | 81 | #endif /* BSD_SYSTEM || STRIDE */ |
d0d6b7c5 | 82 | |
99e3d726 RS |
83 | #ifdef BROKEN_O_NONBLOCK |
84 | #undef O_NONBLOCK | |
85 | #endif /* BROKEN_O_NONBLOCK */ | |
86 | ||
d0d6b7c5 JB |
87 | #ifdef NEED_BSDTTY |
88 | #include <bsdtty.h> | |
89 | #endif | |
90 | ||
d0d6b7c5 JB |
91 | #ifdef IRIS |
92 | #include <sys/sysmacros.h> /* for "minor" */ | |
93 | #endif /* not IRIS */ | |
94 | ||
95 | #include "systime.h" | |
36ebaafa | 96 | #include "systty.h" |
d0d6b7c5 JB |
97 | |
98 | #include "lisp.h" | |
99 | #include "window.h" | |
100 | #include "buffer.h" | |
0fa1789e KH |
101 | #include "charset.h" |
102 | #include "coding.h" | |
d0d6b7c5 JB |
103 | #include "process.h" |
104 | #include "termhooks.h" | |
105 | #include "termopts.h" | |
106 | #include "commands.h" | |
1dc77cc3 | 107 | #include "frame.h" |
ececcbec | 108 | #include "blockinput.h" |
d0d6b7c5 | 109 | |
0c9960e9 RS |
110 | #define max(a, b) ((a) > (b) ? (a) : (b)) |
111 | ||
dd2281ae | 112 | Lisp_Object Qprocessp; |
d0d6b7c5 | 113 | Lisp_Object Qrun, Qstop, Qsignal, Qopen, Qclosed; |
6545aada | 114 | Lisp_Object Qlast_nonmenu_event; |
d0d6b7c5 JB |
115 | /* Qexit is declared and initialized in eval.c. */ |
116 | ||
117 | /* a process object is a network connection when its childp field is neither | |
de282a05 | 118 | Qt nor Qnil but is instead a cons cell (HOSTNAME PORTNUM). */ |
d0d6b7c5 JB |
119 | |
120 | #ifdef HAVE_SOCKETS | |
de282a05 | 121 | #define NETCONN_P(p) (GC_CONSP (XPROCESS (p)->childp)) |
d0d6b7c5 JB |
122 | #else |
123 | #define NETCONN_P(p) 0 | |
124 | #endif /* HAVE_SOCKETS */ | |
125 | ||
126 | /* Define first descriptor number available for subprocesses. */ | |
127 | #ifdef VMS | |
128 | #define FIRST_PROC_DESC 1 | |
129 | #else /* Not VMS */ | |
130 | #define FIRST_PROC_DESC 3 | |
131 | #endif | |
132 | ||
133 | /* Define SIGCHLD as an alias for SIGCLD. There are many conditionals | |
134 | testing SIGCHLD. */ | |
135 | ||
136 | #if !defined (SIGCHLD) && defined (SIGCLD) | |
137 | #define SIGCHLD SIGCLD | |
138 | #endif /* SIGCLD */ | |
139 | ||
140 | #include "syssignal.h" | |
141 | ||
889255b4 | 142 | #include "syswait.h" |
d0d6b7c5 | 143 | |
b062d1fe RM |
144 | extern int errno; |
145 | extern char *strerror (); | |
146 | #ifdef VMS | |
d0d6b7c5 | 147 | extern char *sys_errlist[]; |
b062d1fe | 148 | #endif |
d0d6b7c5 | 149 | |
5f0929a7 RS |
150 | #ifndef HAVE_H_ERRNO |
151 | extern int h_errno; | |
152 | #endif | |
153 | ||
a86928f7 | 154 | #ifndef SYS_SIGLIST_DECLARED |
d0d6b7c5 JB |
155 | #ifndef VMS |
156 | #ifndef BSD4_1 | |
e98d950b | 157 | #ifndef WINDOWSNT |
084fd64a | 158 | #ifndef LINUX |
d0d6b7c5 | 159 | extern char *sys_siglist[]; |
a0e4d3f3 RS |
160 | #endif /* not LINUX */ |
161 | #else /* BSD4_1 */ | |
d0d6b7c5 JB |
162 | char *sys_siglist[] = |
163 | { | |
164 | "bum signal!!", | |
165 | "hangup", | |
166 | "interrupt", | |
167 | "quit", | |
168 | "illegal instruction", | |
169 | "trace trap", | |
170 | "iot instruction", | |
171 | "emt instruction", | |
172 | "floating point exception", | |
173 | "kill", | |
174 | "bus error", | |
175 | "segmentation violation", | |
176 | "bad argument to system call", | |
177 | "write on a pipe with no one to read it", | |
178 | "alarm clock", | |
179 | "software termination signal from kill", | |
180 | "status signal", | |
181 | "sendable stop signal not from tty", | |
182 | "stop signal from tty", | |
183 | "continue a stopped process", | |
184 | "child status has changed", | |
185 | "background read attempted from control tty", | |
186 | "background write attempted from control tty", | |
187 | "input record available at control tty", | |
188 | "exceeded CPU time limit", | |
189 | "exceeded file size limit" | |
190 | }; | |
e98d950b | 191 | #endif /* not WINDOWSNT */ |
d0d6b7c5 JB |
192 | #endif |
193 | #endif /* VMS */ | |
a86928f7 | 194 | #endif /* ! SYS_SIGLIST_DECLARED */ |
d0d6b7c5 | 195 | |
d0d6b7c5 JB |
196 | /* t means use pty, nil means use a pipe, |
197 | maybe other values to come. */ | |
dd2281ae | 198 | static Lisp_Object Vprocess_connection_type; |
d0d6b7c5 JB |
199 | |
200 | #ifdef SKTPAIR | |
201 | #ifndef HAVE_SOCKETS | |
202 | #include <sys/socket.h> | |
203 | #endif | |
204 | #endif /* SKTPAIR */ | |
205 | ||
17d02632 KH |
206 | /* These next two vars are non-static since sysdep.c uses them in the |
207 | emulation of `select'. */ | |
d0d6b7c5 | 208 | /* Number of events of change of status of a process. */ |
17d02632 | 209 | int process_tick; |
d0d6b7c5 | 210 | /* Number of events for which the user or sentinel has been notified. */ |
17d02632 | 211 | int update_tick; |
d0d6b7c5 | 212 | |
5886acf9 | 213 | #include "sysselect.h" |
d0d6b7c5 | 214 | |
583dcae4 | 215 | /* If we support a window system, turn on the code to poll periodically |
44ade2e9 | 216 | to detect C-g. It isn't actually used when doing interrupt input. */ |
583dcae4 | 217 | #ifdef HAVE_WINDOW_SYSTEM |
44ade2e9 RS |
218 | #define POLL_FOR_INPUT |
219 | #endif | |
220 | ||
a69281ff | 221 | /* Mask of bits indicating the descriptors that we wait for input on. */ |
d0d6b7c5 | 222 | |
dd2281ae RS |
223 | static SELECT_TYPE input_wait_mask; |
224 | ||
a69281ff RS |
225 | /* Mask that excludes keyboard input descriptor (s). */ |
226 | ||
227 | static SELECT_TYPE non_keyboard_wait_mask; | |
228 | ||
b5dc1c83 RS |
229 | /* Mask that excludes process input descriptor (s). */ |
230 | ||
231 | static SELECT_TYPE non_process_wait_mask; | |
232 | ||
7d0e672e RS |
233 | /* The largest descriptor currently in use for a process object. */ |
234 | static int max_process_desc; | |
235 | ||
a69281ff RS |
236 | /* The largest descriptor currently in use for keyboard input. */ |
237 | static int max_keyboard_desc; | |
d0d6b7c5 | 238 | |
dd2281ae RS |
239 | /* Nonzero means delete a process right away if it exits. */ |
240 | static int delete_exited_processes; | |
d0d6b7c5 JB |
241 | |
242 | /* Indexed by descriptor, gives the process (if any) for that descriptor */ | |
41f3aa98 | 243 | Lisp_Object chan_process[MAXDESC]; |
d0d6b7c5 JB |
244 | |
245 | /* Alist of elements (NAME . PROCESS) */ | |
41f3aa98 | 246 | Lisp_Object Vprocess_alist; |
d0d6b7c5 JB |
247 | |
248 | /* Buffered-ahead input char from process, indexed by channel. | |
249 | -1 means empty (no char is buffered). | |
250 | Used on sys V where the only way to tell if there is any | |
251 | output from the process is to read at least one char. | |
252 | Always -1 on systems that support FIONREAD. */ | |
253 | ||
e98d950b RS |
254 | /* Don't make static; need to access externally. */ |
255 | int proc_buffered_char[MAXDESC]; | |
dd2281ae | 256 | |
0fa1789e | 257 | /* Table of `struct coding-system' for each process. */ |
c7580538 KH |
258 | static struct coding_system *proc_decode_coding_system[MAXDESC]; |
259 | static struct coding_system *proc_encode_coding_system[MAXDESC]; | |
0fa1789e | 260 | |
dd2281ae | 261 | static Lisp_Object get_process (); |
93b4f699 | 262 | |
fb4c3627 | 263 | extern EMACS_TIME timer_check (); |
5de50bfb | 264 | extern int timers_run; |
fb4c3627 | 265 | |
93b4f699 RS |
266 | /* Maximum number of bytes to send to a pty without an eof. */ |
267 | static int pty_max_bytes; | |
3b9a3dfa | 268 | |
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. */ | |
1092 | len = XSTRING (program)->size + 2; | |
1093 | for (i = 3; i < nargs; i++) | |
1094 | { | |
1095 | tem = args[i]; | |
1096 | CHECK_STRING (tem, i); | |
1097 | len += XSTRING (tem)->size + 1; /* count the blank */ | |
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)) | |
1162 | Fset_marker (XPROCESS (proc)->mark, | |
1163 | make_number (BUF_ZV (XBUFFER (buffer))), buffer); | |
1164 | ||
c7580538 KH |
1165 | if (!NILP (buffer) && NILP (XBUFFER (buffer)->enable_multibyte_characters) |
1166 | || NILP (buffer) && NILP (buffer_defaults.enable_multibyte_characters)) | |
1167 | { | |
1168 | XPROCESS (proc)->decode_coding_system = Qnil; | |
1169 | XPROCESS (proc)->encode_coding_system = Qnil; | |
1170 | } | |
1171 | else | |
1172 | { | |
1173 | /* Setup coding systems for communicating with the process. */ | |
715f7577 | 1174 | /* Qt denotes we have not yet called Ffind_operation_coding_system. */ |
c7580538 KH |
1175 | Lisp_Object coding_systems = Qt; |
1176 | Lisp_Object val, *args2; | |
1177 | struct gcpro gcpro1; | |
0fa1789e | 1178 | |
11f84d7d KH |
1179 | if (!NILP (Vcoding_system_for_read)) |
1180 | val = Vcoding_system_for_read; | |
1181 | else if (NILP (current_buffer->enable_multibyte_characters)) | |
1182 | val = Qemacs_mule; | |
1183 | else | |
c7580538 KH |
1184 | { |
1185 | args2 = (Lisp_Object *) alloca ((nargs + 1) * sizeof *args2); | |
1186 | args2[0] = Qstart_process; | |
1187 | for (i = 0; i < nargs; i++) args2[i + 1] = args[i]; | |
1188 | GCPRO1 (proc); | |
715f7577 | 1189 | coding_systems = Ffind_operation_coding_system (nargs + 1, args2); |
c7580538 KH |
1190 | UNGCPRO; |
1191 | if (CONSP (coding_systems)) | |
1192 | val = XCONS (coding_systems)->car; | |
83502605 KH |
1193 | else if (CONSP (Vdefault_process_coding_system)) |
1194 | val = XCONS (Vdefault_process_coding_system)->car; | |
11f84d7d KH |
1195 | else |
1196 | val = Qnil; | |
c7580538 KH |
1197 | } |
1198 | XPROCESS (proc)->decode_coding_system = val; | |
0fa1789e | 1199 | |
11f84d7d KH |
1200 | if (!NILP (Vcoding_system_for_write)) |
1201 | val = Vcoding_system_for_write; | |
1202 | else if (NILP (current_buffer->enable_multibyte_characters)) | |
1203 | val = Qnil; | |
1204 | else | |
c7580538 KH |
1205 | { |
1206 | if (EQ (coding_systems, Qt)) | |
1207 | { | |
1208 | args2 = (Lisp_Object *) alloca ((nargs + 1) * sizeof args2); | |
1209 | args2[0] = Qstart_process; | |
1210 | for (i = 0; i < nargs; i++) args2[i + 1] = args[i]; | |
1211 | GCPRO1 (proc); | |
715f7577 KH |
1212 | coding_systems = |
1213 | Ffind_operation_coding_system (nargs + 1, args2); | |
c7580538 KH |
1214 | UNGCPRO; |
1215 | } | |
1216 | if (CONSP (coding_systems)) | |
1217 | val = XCONS (coding_systems)->cdr; | |
83502605 KH |
1218 | else if (CONSP (Vdefault_process_coding_system)) |
1219 | val = XCONS (Vdefault_process_coding_system)->cdr; | |
11f84d7d KH |
1220 | else |
1221 | val = Qnil; | |
c7580538 KH |
1222 | } |
1223 | XPROCESS (proc)->encode_coding_system = val; | |
1224 | } | |
0fa1789e KH |
1225 | |
1226 | XPROCESS (proc)->decoding_buf = make_uninit_string (0); | |
1227 | XPROCESS (proc)->encoding_buf = make_uninit_string (0); | |
1228 | ||
1e30af70 | 1229 | create_process (proc, new_argv, current_dir); |
d0d6b7c5 | 1230 | |
b0310da4 | 1231 | return unbind_to (count, proc); |
d0d6b7c5 JB |
1232 | } |
1233 | ||
b0310da4 | 1234 | /* This function is the unwind_protect form for Fstart_process. If |
8e6208c5 | 1235 | PROC doesn't have its pid set, then we know someone has signaled |
b0310da4 JB |
1236 | an error and the process wasn't started successfully, so we should |
1237 | remove it from the process list. */ | |
1238 | static Lisp_Object | |
1239 | start_process_unwind (proc) | |
1240 | Lisp_Object proc; | |
1241 | { | |
bcd69aea | 1242 | if (!PROCESSP (proc)) |
b0310da4 JB |
1243 | abort (); |
1244 | ||
1245 | /* Was PROC started successfully? */ | |
188d6c4e | 1246 | if (XINT (XPROCESS (proc)->pid) <= 0) |
b0310da4 JB |
1247 | remove_process (proc); |
1248 | ||
1249 | return Qnil; | |
1250 | } | |
1251 | ||
1252 | ||
d0d6b7c5 JB |
1253 | SIGTYPE |
1254 | create_process_1 (signo) | |
1255 | int signo; | |
1256 | { | |
3c0ee47b | 1257 | #if defined (USG) && !defined (POSIX_SIGNALS) |
d0d6b7c5 JB |
1258 | /* USG systems forget handlers when they are used; |
1259 | must reestablish each time */ | |
1260 | signal (signo, create_process_1); | |
1261 | #endif /* USG */ | |
1262 | } | |
1263 | ||
1264 | #if 0 /* This doesn't work; see the note before sigchld_handler. */ | |
1265 | #ifdef USG | |
1266 | #ifdef SIGCHLD | |
1267 | /* Mimic blocking of signals on system V, which doesn't really have it. */ | |
1268 | ||
1269 | /* Nonzero means we got a SIGCHLD when it was supposed to be blocked. */ | |
1270 | int sigchld_deferred; | |
1271 | ||
1272 | SIGTYPE | |
1273 | create_process_sigchld () | |
1274 | { | |
1275 | signal (SIGCHLD, create_process_sigchld); | |
1276 | ||
1277 | sigchld_deferred = 1; | |
1278 | } | |
1279 | #endif | |
1280 | #endif | |
1281 | #endif | |
1282 | ||
1283 | #ifndef VMS /* VMS version of this function is in vmsproc.c. */ | |
1e30af70 | 1284 | create_process (process, new_argv, current_dir) |
d0d6b7c5 JB |
1285 | Lisp_Object process; |
1286 | char **new_argv; | |
1e30af70 | 1287 | Lisp_Object current_dir; |
d0d6b7c5 | 1288 | { |
ecd1f654 | 1289 | int pid, inchannel, outchannel; |
d0d6b7c5 | 1290 | int sv[2]; |
0dc70c33 KH |
1291 | #ifdef POSIX_SIGNALS |
1292 | sigset_t procmask; | |
1293 | sigset_t blocked; | |
1294 | struct sigaction sigint_action; | |
1295 | struct sigaction sigquit_action; | |
1296 | #ifdef AIX | |
1297 | struct sigaction sighup_action; | |
1298 | #endif | |
1299 | #else /* !POSIX_SIGNALS */ | |
d0d6b7c5 JB |
1300 | #ifdef SIGCHLD |
1301 | SIGTYPE (*sigchld)(); | |
1302 | #endif | |
0dc70c33 | 1303 | #endif /* !POSIX_SIGNALS */ |
ecd1f654 KH |
1304 | /* Use volatile to protect variables from being clobbered by longjmp. */ |
1305 | volatile int forkin, forkout; | |
1306 | volatile int pty_flag = 0; | |
d0d6b7c5 JB |
1307 | extern char **environ; |
1308 | ||
d0d6b7c5 JB |
1309 | inchannel = outchannel = -1; |
1310 | ||
1311 | #ifdef HAVE_PTYS | |
fe45da4e | 1312 | if (!NILP (Vprocess_connection_type)) |
d0d6b7c5 JB |
1313 | outchannel = inchannel = allocate_pty (); |
1314 | ||
d0d6b7c5 JB |
1315 | if (inchannel >= 0) |
1316 | { | |
1317 | #ifndef USG | |
1318 | /* On USG systems it does not work to open the pty's tty here | |
1319 | and then close and reopen it in the child. */ | |
1320 | #ifdef O_NOCTTY | |
1321 | /* Don't let this terminal become our controlling terminal | |
1322 | (in case we don't have one). */ | |
1323 | forkout = forkin = open (pty_name, O_RDWR | O_NOCTTY, 0); | |
1324 | #else | |
1325 | forkout = forkin = open (pty_name, O_RDWR, 0); | |
1326 | #endif | |
1327 | if (forkin < 0) | |
1328 | report_file_error ("Opening pty", Qnil); | |
1329 | #else | |
1330 | forkin = forkout = -1; | |
1331 | #endif /* not USG */ | |
1332 | pty_flag = 1; | |
1333 | } | |
1334 | else | |
1335 | #endif /* HAVE_PTYS */ | |
1336 | #ifdef SKTPAIR | |
1337 | { | |
1338 | if (socketpair (AF_UNIX, SOCK_STREAM, 0, sv) < 0) | |
1339 | report_file_error ("Opening socketpair", Qnil); | |
1340 | outchannel = inchannel = sv[0]; | |
1341 | forkout = forkin = sv[1]; | |
1342 | } | |
1343 | #else /* not SKTPAIR */ | |
1344 | { | |
1345 | pipe (sv); | |
1346 | inchannel = sv[0]; | |
1347 | forkout = sv[1]; | |
1348 | pipe (sv); | |
1349 | outchannel = sv[1]; | |
1350 | forkin = sv[0]; | |
1351 | } | |
1352 | #endif /* not SKTPAIR */ | |
1353 | ||
1354 | #if 0 | |
1355 | /* Replaced by close_process_descs */ | |
1356 | set_exclusive_use (inchannel); | |
1357 | set_exclusive_use (outchannel); | |
1358 | #endif | |
1359 | ||
1360 | /* Stride people say it's a mystery why this is needed | |
1361 | as well as the O_NDELAY, but that it fails without this. */ | |
1362 | #if defined (STRIDE) || (defined (pfa) && defined (HAVE_PTYS)) | |
1363 | { | |
1364 | int one = 1; | |
1365 | ioctl (inchannel, FIONBIO, &one); | |
1366 | } | |
1367 | #endif | |
1368 | ||
1369 | #ifdef O_NONBLOCK | |
1370 | fcntl (inchannel, F_SETFL, O_NONBLOCK); | |
03832893 | 1371 | fcntl (outchannel, F_SETFL, O_NONBLOCK); |
d0d6b7c5 JB |
1372 | #else |
1373 | #ifdef O_NDELAY | |
1374 | fcntl (inchannel, F_SETFL, O_NDELAY); | |
03832893 | 1375 | fcntl (outchannel, F_SETFL, O_NDELAY); |
d0d6b7c5 JB |
1376 | #endif |
1377 | #endif | |
1378 | ||
1379 | /* Record this as an active process, with its channels. | |
1380 | As a result, child_setup will close Emacs's side of the pipes. */ | |
1381 | chan_process[inchannel] = process; | |
1d056e64 KH |
1382 | XSETINT (XPROCESS (process)->infd, inchannel); |
1383 | XSETINT (XPROCESS (process)->outfd, outchannel); | |
d0d6b7c5 JB |
1384 | /* Record the tty descriptor used in the subprocess. */ |
1385 | if (forkin < 0) | |
1386 | XPROCESS (process)->subtty = Qnil; | |
1387 | else | |
22719df2 | 1388 | XSETFASTINT (XPROCESS (process)->subtty, forkin); |
d0d6b7c5 JB |
1389 | XPROCESS (process)->pty_flag = (pty_flag ? Qt : Qnil); |
1390 | XPROCESS (process)->status = Qrun; | |
c7580538 KH |
1391 | if (!proc_decode_coding_system[inchannel]) |
1392 | proc_decode_coding_system[inchannel] | |
1393 | = (struct coding_system *) xmalloc (sizeof (struct coding_system)); | |
0fa1789e | 1394 | setup_coding_system (XPROCESS (process)->decode_coding_system, |
c7580538 KH |
1395 | proc_decode_coding_system[inchannel]); |
1396 | if (!proc_encode_coding_system[outchannel]) | |
1397 | proc_encode_coding_system[outchannel] | |
1398 | = (struct coding_system *) xmalloc (sizeof (struct coding_system)); | |
0fa1789e | 1399 | setup_coding_system (XPROCESS (process)->encode_coding_system, |
c7580538 | 1400 | proc_encode_coding_system[outchannel]); |
d0d6b7c5 JB |
1401 | |
1402 | /* Delay interrupts until we have a chance to store | |
1403 | the new fork's pid in its process structure */ | |
0dc70c33 KH |
1404 | #ifdef POSIX_SIGNALS |
1405 | sigemptyset (&blocked); | |
1406 | #ifdef SIGCHLD | |
1407 | sigaddset (&blocked, SIGCHLD); | |
1408 | #endif | |
1409 | #ifdef HAVE_VFORK | |
1410 | /* On many hosts (e.g. Solaris 2.4), if a vforked child calls `signal', | |
1411 | this sets the parent's signal handlers as well as the child's. | |
1412 | So delay all interrupts whose handlers the child might munge, | |
1413 | and record the current handlers so they can be restored later. */ | |
1414 | sigaddset (&blocked, SIGINT ); sigaction (SIGINT , 0, &sigint_action ); | |
1415 | sigaddset (&blocked, SIGQUIT); sigaction (SIGQUIT, 0, &sigquit_action); | |
1416 | #ifdef AIX | |
1417 | sigaddset (&blocked, SIGHUP ); sigaction (SIGHUP , 0, &sighup_action ); | |
1418 | #endif | |
1419 | #endif /* HAVE_VFORK */ | |
1420 | sigprocmask (SIG_BLOCK, &blocked, &procmask); | |
1421 | #else /* !POSIX_SIGNALS */ | |
d0d6b7c5 JB |
1422 | #ifdef SIGCHLD |
1423 | #ifdef BSD4_1 | |
1424 | sighold (SIGCHLD); | |
1425 | #else /* not BSD4_1 */ | |
6df54671 | 1426 | #if defined (BSD_SYSTEM) || defined (UNIPLUS) || defined (HPUX) |
d0d6b7c5 JB |
1427 | sigsetmask (sigmask (SIGCHLD)); |
1428 | #else /* ordinary USG */ | |
1429 | #if 0 | |
1430 | sigchld_deferred = 0; | |
1431 | sigchld = signal (SIGCHLD, create_process_sigchld); | |
1432 | #endif | |
1433 | #endif /* ordinary USG */ | |
1434 | #endif /* not BSD4_1 */ | |
1435 | #endif /* SIGCHLD */ | |
0dc70c33 | 1436 | #endif /* !POSIX_SIGNALS */ |
d0d6b7c5 | 1437 | |
3081bf8d | 1438 | FD_SET (inchannel, &input_wait_mask); |
a69281ff | 1439 | FD_SET (inchannel, &non_keyboard_wait_mask); |
3081bf8d KH |
1440 | if (inchannel > max_process_desc) |
1441 | max_process_desc = inchannel; | |
1442 | ||
d0d6b7c5 JB |
1443 | /* Until we store the proper pid, enable sigchld_handler |
1444 | to recognize an unknown pid as standing for this process. | |
1445 | It is very important not to let this `marker' value stay | |
1446 | in the table after this function has returned; if it does | |
1447 | it might cause call-process to hang and subsequent asynchronous | |
1448 | processes to get their return values scrambled. */ | |
1449 | XSETINT (XPROCESS (process)->pid, -1); | |
1450 | ||
ececcbec RS |
1451 | BLOCK_INPUT; |
1452 | ||
d0d6b7c5 JB |
1453 | { |
1454 | /* child_setup must clobber environ on systems with true vfork. | |
1455 | Protect it from permanent change. */ | |
1456 | char **save_environ = environ; | |
1457 | ||
a932f187 RS |
1458 | current_dir |
1459 | = Fencode_coding_string (current_dir, Vfile_name_coding_system, Qt); | |
1460 | ||
e98d950b | 1461 | #ifndef WINDOWSNT |
d0d6b7c5 JB |
1462 | pid = vfork (); |
1463 | if (pid == 0) | |
e98d950b | 1464 | #endif /* not WINDOWSNT */ |
d0d6b7c5 JB |
1465 | { |
1466 | int xforkin = forkin; | |
1467 | int xforkout = forkout; | |
1468 | ||
1469 | #if 0 /* This was probably a mistake--it duplicates code later on, | |
1470 | but fails to handle all the cases. */ | |
1471 | /* Make sure SIGCHLD is not blocked in the child. */ | |
1472 | sigsetmask (SIGEMPTYMASK); | |
1473 | #endif | |
1474 | ||
1475 | /* Make the pty be the controlling terminal of the process. */ | |
1476 | #ifdef HAVE_PTYS | |
1477 | /* First, disconnect its current controlling terminal. */ | |
1478 | #ifdef HAVE_SETSID | |
7ce48618 RS |
1479 | /* We tried doing setsid only if pty_flag, but it caused |
1480 | process_set_signal to fail on SGI when using a pipe. */ | |
1481 | setsid (); | |
ce4c9c90 | 1482 | /* Make the pty's terminal the controlling terminal. */ |
084fd64a | 1483 | if (pty_flag) |
39e9ebcd | 1484 | { |
39e9ebcd RS |
1485 | #ifdef TIOCSCTTY |
1486 | /* We ignore the return value | |
1487 | because faith@cs.unc.edu says that is necessary on Linux. */ | |
1488 | ioctl (xforkin, TIOCSCTTY, 0); | |
ce4c9c90 | 1489 | #endif |
39e9ebcd | 1490 | } |
d0d6b7c5 | 1491 | #else /* not HAVE_SETSID */ |
c14e53a4 | 1492 | #ifdef USG |
000ab717 | 1493 | /* It's very important to call setpgrp here and no time |
d0d6b7c5 JB |
1494 | afterwards. Otherwise, we lose our controlling tty which |
1495 | is set when we open the pty. */ | |
1496 | setpgrp (); | |
1497 | #endif /* USG */ | |
1498 | #endif /* not HAVE_SETSID */ | |
9bcf8ec6 KH |
1499 | #if defined (HAVE_TERMIOS) && defined (LDISC1) |
1500 | if (pty_flag && xforkin >= 0) | |
1501 | { | |
1502 | struct termios t; | |
1503 | tcgetattr (xforkin, &t); | |
1504 | t.c_lflag = LDISC1; | |
1505 | if (tcsetattr (xforkin, TCSANOW, &t) < 0) | |
1506 | write (1, "create_process/tcsetattr LDISC1 failed\n", 39); | |
1507 | } | |
1508 | #else | |
aafadd9f | 1509 | #if defined (NTTYDISC) && defined (TIOCSETD) |
ff773a4e | 1510 | if (pty_flag && xforkin >= 0) |
afc549fd RS |
1511 | { |
1512 | /* Use new line discipline. */ | |
1513 | int ldisc = NTTYDISC; | |
4458f555 | 1514 | ioctl (xforkin, TIOCSETD, &ldisc); |
afc549fd | 1515 | } |
000ab717 | 1516 | #endif |
9bcf8ec6 | 1517 | #endif |
d0d6b7c5 JB |
1518 | #ifdef TIOCNOTTY |
1519 | /* In 4.3BSD, the TIOCSPGRP bug has been fixed, and now you | |
1520 | can do TIOCSPGRP only to the process's controlling tty. */ | |
1521 | if (pty_flag) | |
1522 | { | |
1523 | /* I wonder: would just ioctl (0, TIOCNOTTY, 0) work here? | |
1524 | I can't test it since I don't have 4.3. */ | |
1525 | int j = open ("/dev/tty", O_RDWR, 0); | |
1526 | ioctl (j, TIOCNOTTY, 0); | |
1527 | close (j); | |
5a570e37 | 1528 | #ifndef USG |
d0d6b7c5 JB |
1529 | /* In order to get a controlling terminal on some versions |
1530 | of BSD, it is necessary to put the process in pgrp 0 | |
1531 | before it opens the terminal. */ | |
99c1aeca | 1532 | #ifdef HAVE_SETPGID |
3ea1d291 RS |
1533 | setpgid (0, 0); |
1534 | #else | |
d0d6b7c5 | 1535 | setpgrp (0, 0); |
3ea1d291 | 1536 | #endif |
d0d6b7c5 JB |
1537 | #endif |
1538 | } | |
1539 | #endif /* TIOCNOTTY */ | |
1540 | ||
99153b9e | 1541 | #if !defined (RTU) && !defined (UNIPLUS) && !defined (DONT_REOPEN_PTY) |
d0d6b7c5 | 1542 | /*** There is a suggestion that this ought to be a |
99153b9e RS |
1543 | conditional on TIOCSPGRP, |
1544 | or !(defined (HAVE_SETSID) && defined (TIOCSCTTY)). | |
1545 | Trying the latter gave the wrong results on Debian GNU/Linux 1.1; | |
1546 | that system does seem to need this code, even though | |
1547 | both HAVE_SETSID and TIOCSCTTY are defined. */ | |
d0d6b7c5 JB |
1548 | /* Now close the pty (if we had it open) and reopen it. |
1549 | This makes the pty the controlling terminal of the subprocess. */ | |
1550 | if (pty_flag) | |
1551 | { | |
99e3d726 RS |
1552 | #ifdef SET_CHILD_PTY_PGRP |
1553 | int pgrp = getpid (); | |
1554 | #endif | |
1555 | ||
d0d6b7c5 JB |
1556 | /* I wonder if close (open (pty_name, ...)) would work? */ |
1557 | if (xforkin >= 0) | |
1558 | close (xforkin); | |
1559 | xforkout = xforkin = open (pty_name, O_RDWR, 0); | |
1560 | ||
4aa54ba8 RS |
1561 | if (xforkin < 0) |
1562 | { | |
1563 | write (1, "Couldn't open the pty terminal ", 31); | |
1564 | write (1, pty_name, strlen (pty_name)); | |
1565 | write (1, "\n", 1); | |
1566 | _exit (1); | |
1567 | } | |
1568 | ||
99e3d726 RS |
1569 | #ifdef SET_CHILD_PTY_PGRP |
1570 | ioctl (xforkin, TIOCSPGRP, &pgrp); | |
1571 | ioctl (xforkout, TIOCSPGRP, &pgrp); | |
1572 | #endif | |
d0d6b7c5 | 1573 | } |
99153b9e | 1574 | #endif /* not UNIPLUS and not RTU and not DONT_REOPEN_PTY */ |
e9bf058b | 1575 | |
d0d6b7c5 | 1576 | #ifdef SETUP_SLAVE_PTY |
13a72104 RS |
1577 | if (pty_flag) |
1578 | { | |
1579 | SETUP_SLAVE_PTY; | |
1580 | } | |
d0d6b7c5 JB |
1581 | #endif /* SETUP_SLAVE_PTY */ |
1582 | #ifdef AIX | |
1583 | /* On AIX, we've disabled SIGHUP above once we start a child on a pty. | |
1584 | Now reenable it in the child, so it will die when we want it to. */ | |
1585 | if (pty_flag) | |
1586 | signal (SIGHUP, SIG_DFL); | |
1587 | #endif | |
1588 | #endif /* HAVE_PTYS */ | |
1589 | ||
0dc70c33 KH |
1590 | signal (SIGINT, SIG_DFL); |
1591 | signal (SIGQUIT, SIG_DFL); | |
1592 | ||
1593 | /* Stop blocking signals in the child. */ | |
1594 | #ifdef POSIX_SIGNALS | |
1595 | sigprocmask (SIG_SETMASK, &procmask, 0); | |
1596 | #else /* !POSIX_SIGNALS */ | |
d0d6b7c5 JB |
1597 | #ifdef SIGCHLD |
1598 | #ifdef BSD4_1 | |
1599 | sigrelse (SIGCHLD); | |
1600 | #else /* not BSD4_1 */ | |
6df54671 | 1601 | #if defined (BSD_SYSTEM) || defined (UNIPLUS) || defined (HPUX) |
d0d6b7c5 JB |
1602 | sigsetmask (SIGEMPTYMASK); |
1603 | #else /* ordinary USG */ | |
63528b78 | 1604 | #if 0 |
d0d6b7c5 | 1605 | signal (SIGCHLD, sigchld); |
63528b78 | 1606 | #endif |
d0d6b7c5 JB |
1607 | #endif /* ordinary USG */ |
1608 | #endif /* not BSD4_1 */ | |
1609 | #endif /* SIGCHLD */ | |
0dc70c33 | 1610 | #endif /* !POSIX_SIGNALS */ |
5e7e1da2 | 1611 | |
ab01d0a8 RS |
1612 | if (pty_flag) |
1613 | child_setup_tty (xforkout); | |
e98d950b RS |
1614 | #ifdef WINDOWSNT |
1615 | pid = child_setup (xforkin, xforkout, xforkout, | |
1616 | new_argv, 1, current_dir); | |
1617 | #else /* not WINDOWSNT */ | |
d0d6b7c5 | 1618 | child_setup (xforkin, xforkout, xforkout, |
e065a56e | 1619 | new_argv, 1, current_dir); |
e98d950b | 1620 | #endif /* not WINDOWSNT */ |
d0d6b7c5 JB |
1621 | } |
1622 | environ = save_environ; | |
1623 | } | |
1624 | ||
ececcbec RS |
1625 | UNBLOCK_INPUT; |
1626 | ||
4a127b3b | 1627 | /* This runs in the Emacs process. */ |
d0d6b7c5 | 1628 | if (pid < 0) |
6311cf58 RS |
1629 | { |
1630 | if (forkin >= 0) | |
1631 | close (forkin); | |
1632 | if (forkin != forkout && forkout >= 0) | |
1633 | close (forkout); | |
6311cf58 | 1634 | } |
4a127b3b KH |
1635 | else |
1636 | { | |
1637 | /* vfork succeeded. */ | |
1638 | XSETFASTINT (XPROCESS (process)->pid, pid); | |
d0d6b7c5 | 1639 | |
e98d950b | 1640 | #ifdef WINDOWSNT |
4a127b3b | 1641 | register_child (pid, inchannel); |
e98d950b RS |
1642 | #endif /* WINDOWSNT */ |
1643 | ||
4a127b3b KH |
1644 | /* If the subfork execv fails, and it exits, |
1645 | this close hangs. I don't know why. | |
1646 | So have an interrupt jar it loose. */ | |
1647 | stop_polling (); | |
1648 | signal (SIGALRM, create_process_1); | |
1649 | alarm (1); | |
1650 | XPROCESS (process)->subtty = Qnil; | |
1651 | if (forkin >= 0) | |
1652 | close (forkin); | |
1653 | alarm (0); | |
1654 | start_polling (); | |
1655 | if (forkin != forkout && forkout >= 0) | |
1656 | close (forkout); | |
d0d6b7c5 | 1657 | |
875e6b94 | 1658 | #ifdef HAVE_PTYS |
4a127b3b KH |
1659 | if (pty_flag) |
1660 | XPROCESS (process)->tty_name = build_string (pty_name); | |
1661 | else | |
875e6b94 | 1662 | #endif |
4a127b3b KH |
1663 | XPROCESS (process)->tty_name = Qnil; |
1664 | } | |
3b9a3dfa | 1665 | |
4a127b3b KH |
1666 | /* Restore the signal state whether vfork succeeded or not. |
1667 | (We will signal an error, below, if it failed.) */ | |
0dc70c33 KH |
1668 | #ifdef POSIX_SIGNALS |
1669 | #ifdef HAVE_VFORK | |
1670 | /* Restore the parent's signal handlers. */ | |
1671 | sigaction (SIGINT, &sigint_action, 0); | |
1672 | sigaction (SIGQUIT, &sigquit_action, 0); | |
1673 | #ifdef AIX | |
1674 | sigaction (SIGHUP, &sighup_action, 0); | |
1675 | #endif | |
1676 | #endif /* HAVE_VFORK */ | |
1677 | /* Stop blocking signals in the parent. */ | |
1678 | sigprocmask (SIG_SETMASK, &procmask, 0); | |
1679 | #else /* !POSIX_SIGNALS */ | |
d0d6b7c5 JB |
1680 | #ifdef SIGCHLD |
1681 | #ifdef BSD4_1 | |
1682 | sigrelse (SIGCHLD); | |
1683 | #else /* not BSD4_1 */ | |
6df54671 | 1684 | #if defined (BSD_SYSTEM) || defined (UNIPLUS) || defined (HPUX) |
d0d6b7c5 JB |
1685 | sigsetmask (SIGEMPTYMASK); |
1686 | #else /* ordinary USG */ | |
1687 | #if 0 | |
1688 | signal (SIGCHLD, sigchld); | |
1689 | /* Now really handle any of these signals | |
1690 | that came in during this function. */ | |
1691 | if (sigchld_deferred) | |
1692 | kill (getpid (), SIGCHLD); | |
1693 | #endif | |
1694 | #endif /* ordinary USG */ | |
1695 | #endif /* not BSD4_1 */ | |
1696 | #endif /* SIGCHLD */ | |
0dc70c33 | 1697 | #endif /* !POSIX_SIGNALS */ |
4a127b3b KH |
1698 | |
1699 | /* Now generate the error if vfork failed. */ | |
1700 | if (pid < 0) | |
1701 | report_file_error ("Doing vfork", Qnil); | |
d0d6b7c5 JB |
1702 | } |
1703 | #endif /* not VMS */ | |
1704 | ||
1705 | #ifdef HAVE_SOCKETS | |
1706 | ||
1707 | /* open a TCP network connection to a given HOST/SERVICE. Treated | |
1708 | exactly like a normal process when reading and writing. Only | |
1709 | differences are in status display and process deletion. A network | |
1710 | connection has no PID; you cannot signal it. All you can do is | |
1711 | deactivate and close it via delete-process */ | |
1712 | ||
1713 | DEFUN ("open-network-stream", Fopen_network_stream, Sopen_network_stream, | |
1714 | 4, 4, 0, | |
1715 | "Open a TCP connection for a service to a host.\n\ | |
1716 | Returns a subprocess-object to represent the connection.\n\ | |
1717 | Input and output work as for subprocesses; `delete-process' closes it.\n\ | |
1718 | Args are NAME BUFFER HOST SERVICE.\n\ | |
1719 | NAME is name for process. It is modified if necessary to make it unique.\n\ | |
1720 | BUFFER is the buffer (or buffer-name) to associate with the process.\n\ | |
1721 | Process output goes at end of that buffer, unless you specify\n\ | |
1722 | an output stream or filter function to handle the output.\n\ | |
1723 | BUFFER may be also nil, meaning that this process is not associated\n\ | |
1724 | with any buffer\n\ | |
1725 | Third arg is name of the host to connect to, or its IP address.\n\ | |
1726 | Fourth arg SERVICE is name of the service desired, or an integer\n\ | |
1727 | specifying a port number to connect to.") | |
1728 | (name, buffer, host, service) | |
1729 | Lisp_Object name, buffer, host, service; | |
1730 | { | |
1731 | Lisp_Object proc; | |
1732 | register int i; | |
1733 | struct sockaddr_in address; | |
1734 | struct servent *svc_info; | |
1735 | struct hostent *host_info_ptr, host_info; | |
1736 | char *(addr_list[2]); | |
79967d5e | 1737 | IN_ADDR numeric_addr; |
d0d6b7c5 JB |
1738 | int s, outch, inch; |
1739 | char errstring[80]; | |
1740 | int port; | |
1741 | struct hostent host_info_fixed; | |
1742 | struct gcpro gcpro1, gcpro2, gcpro3, gcpro4; | |
e333e864 | 1743 | int retry = 0; |
44ade2e9 | 1744 | int count = specpdl_ptr - specpdl; |
d0d6b7c5 | 1745 | |
bff3ed0a RS |
1746 | #ifdef WINDOWSNT |
1747 | /* Ensure socket support is loaded if available. */ | |
1748 | init_winsock (TRUE); | |
1749 | #endif | |
1750 | ||
d0d6b7c5 JB |
1751 | GCPRO4 (name, buffer, host, service); |
1752 | CHECK_STRING (name, 0); | |
1753 | CHECK_STRING (host, 0); | |
bcd69aea | 1754 | if (INTEGERP (service)) |
d0d6b7c5 JB |
1755 | port = htons ((unsigned short) XINT (service)); |
1756 | else | |
1757 | { | |
1758 | CHECK_STRING (service, 0); | |
1759 | svc_info = getservbyname (XSTRING (service)->data, "tcp"); | |
1760 | if (svc_info == 0) | |
1761 | error ("Unknown service \"%s\"", XSTRING (service)->data); | |
1762 | port = svc_info->s_port; | |
1763 | } | |
1764 | ||
798b64bb KH |
1765 | /* Slow down polling to every ten seconds. |
1766 | Some kernels have a bug which causes retrying connect to fail | |
1767 | after a connect. Polling can interfere with gethostbyname too. */ | |
1768 | #ifdef POLL_FOR_INPUT | |
1769 | bind_polling_period (10); | |
1770 | #endif | |
1771 | ||
1d2c16fa | 1772 | #ifndef TERM |
616da37c RS |
1773 | while (1) |
1774 | { | |
5f0929a7 RS |
1775 | #ifdef TRY_AGAIN |
1776 | h_errno = 0; | |
1777 | #endif | |
5d6c2aa3 RS |
1778 | immediate_quit = 1; |
1779 | QUIT; | |
616da37c | 1780 | host_info_ptr = gethostbyname (XSTRING (host)->data); |
5d6c2aa3 | 1781 | immediate_quit = 0; |
616da37c RS |
1782 | #ifdef TRY_AGAIN |
1783 | if (! (host_info_ptr == 0 && h_errno == TRY_AGAIN)) | |
1784 | #endif | |
1785 | break; | |
1786 | Fsleep_for (make_number (1), Qnil); | |
1787 | } | |
d0d6b7c5 JB |
1788 | if (host_info_ptr == 0) |
1789 | /* Attempt to interpret host as numeric inet address */ | |
1790 | { | |
393a9679 | 1791 | numeric_addr = inet_addr ((char *) XSTRING (host)->data); |
79967d5e | 1792 | if (NUMERIC_ADDR_ERROR) |
d0d6b7c5 JB |
1793 | error ("Unknown host \"%s\"", XSTRING (host)->data); |
1794 | ||
1795 | host_info_ptr = &host_info; | |
1796 | host_info.h_name = 0; | |
1797 | host_info.h_aliases = 0; | |
1798 | host_info.h_addrtype = AF_INET; | |
39a21be6 JB |
1799 | #ifdef h_addr |
1800 | /* Older machines have only one address slot called h_addr. | |
1801 | Newer machines have h_addr_list, but #define h_addr to | |
1802 | be its first element. */ | |
1803 | host_info.h_addr_list = &(addr_list[0]); | |
1804 | #endif | |
1805 | host_info.h_addr = (char*)(&numeric_addr); | |
d0d6b7c5 | 1806 | addr_list[1] = 0; |
8777fbe2 RS |
1807 | /* numeric_addr isn't null-terminated; it has fixed length. */ |
1808 | host_info.h_length = sizeof (numeric_addr); | |
d0d6b7c5 JB |
1809 | } |
1810 | ||
1811 | bzero (&address, sizeof address); | |
1812 | bcopy (host_info_ptr->h_addr, (char *) &address.sin_addr, | |
1813 | host_info_ptr->h_length); | |
1814 | address.sin_family = host_info_ptr->h_addrtype; | |
1815 | address.sin_port = port; | |
1816 | ||
1817 | s = socket (host_info_ptr->h_addrtype, SOCK_STREAM, 0); | |
1818 | if (s < 0) | |
1819 | report_file_error ("error creating socket", Fcons (name, Qnil)); | |
1820 | ||
457a9bee RS |
1821 | /* Kernel bugs (on Ultrix at least) cause lossage (not just EINTR) |
1822 | when connect is interrupted. So let's not let it get interrupted. | |
1823 | Note we do not turn off polling, because polling is only used | |
1824 | when not interrupt_input, and thus not normally used on the systems | |
1825 | which have this bug. On systems which use polling, there's no way | |
1826 | to quit if polling is turned off. */ | |
1827 | if (interrupt_input) | |
1828 | unrequest_sigio (); | |
1829 | ||
d0d6b7c5 | 1830 | loop: |
0f2ee0c1 RS |
1831 | |
1832 | immediate_quit = 1; | |
1833 | QUIT; | |
1834 | ||
e333e864 RS |
1835 | if (connect (s, (struct sockaddr *) &address, sizeof address) == -1 |
1836 | && errno != EISCONN) | |
d0d6b7c5 JB |
1837 | { |
1838 | int xerrno = errno; | |
e333e864 | 1839 | |
0f2ee0c1 RS |
1840 | immediate_quit = 0; |
1841 | ||
d0d6b7c5 JB |
1842 | if (errno == EINTR) |
1843 | goto loop; | |
e333e864 RS |
1844 | if (errno == EADDRINUSE && retry < 20) |
1845 | { | |
4590788a RS |
1846 | /* A delay here is needed on some FreeBSD systems, |
1847 | and it is harmless, since this retrying takes time anyway | |
1848 | and should be infrequent. */ | |
1849 | Fsleep_for (make_number (1), Qnil); | |
e333e864 RS |
1850 | retry++; |
1851 | goto loop; | |
1852 | } | |
1853 | ||
d0d6b7c5 | 1854 | close (s); |
457a9bee RS |
1855 | |
1856 | if (interrupt_input) | |
1857 | request_sigio (); | |
1858 | ||
d0d6b7c5 JB |
1859 | errno = xerrno; |
1860 | report_file_error ("connection failed", | |
1861 | Fcons (host, Fcons (name, Qnil))); | |
1862 | } | |
457a9bee | 1863 | |
0f2ee0c1 RS |
1864 | immediate_quit = 0; |
1865 | ||
44ade2e9 RS |
1866 | #ifdef POLL_FOR_INPUT |
1867 | unbind_to (count, Qnil); | |
1868 | #endif | |
1869 | ||
457a9bee RS |
1870 | if (interrupt_input) |
1871 | request_sigio (); | |
1872 | ||
1d2c16fa RS |
1873 | #else /* TERM */ |
1874 | s = connect_server (0); | |
1875 | if (s < 0) | |
1876 | report_file_error ("error creating socket", Fcons (name, Qnil)); | |
1877 | send_command (s, C_PORT, 0, "%s:%d", XSTRING (host)->data, ntohs (port)); | |
1878 | send_command (s, C_DUMB, 1, 0); | |
1879 | #endif /* TERM */ | |
d0d6b7c5 JB |
1880 | |
1881 | inch = s; | |
59f23005 | 1882 | outch = s; |
d0d6b7c5 JB |
1883 | |
1884 | if (!NILP (buffer)) | |
1885 | buffer = Fget_buffer_create (buffer); | |
1886 | proc = make_process (name); | |
1887 | ||
1888 | chan_process[inch] = proc; | |
1889 | ||
1890 | #ifdef O_NONBLOCK | |
1891 | fcntl (inch, F_SETFL, O_NONBLOCK); | |
1892 | #else | |
1893 | #ifdef O_NDELAY | |
1894 | fcntl (inch, F_SETFL, O_NDELAY); | |
1895 | #endif | |
1896 | #endif | |
1897 | ||
de282a05 | 1898 | XPROCESS (proc)->childp = Fcons (host, Fcons (service, Qnil)); |
d0d6b7c5 JB |
1899 | XPROCESS (proc)->command_channel_p = Qnil; |
1900 | XPROCESS (proc)->buffer = buffer; | |
1901 | XPROCESS (proc)->sentinel = Qnil; | |
1902 | XPROCESS (proc)->filter = Qnil; | |
1903 | XPROCESS (proc)->command = Qnil; | |
1904 | XPROCESS (proc)->pid = Qnil; | |
7795ff9b | 1905 | XSETINT (XPROCESS (proc)->infd, inch); |
1d056e64 | 1906 | XSETINT (XPROCESS (proc)->outfd, outch); |
d0d6b7c5 JB |
1907 | XPROCESS (proc)->status = Qrun; |
1908 | FD_SET (inch, &input_wait_mask); | |
a69281ff | 1909 | FD_SET (inch, &non_keyboard_wait_mask); |
7d0e672e RS |
1910 | if (inch > max_process_desc) |
1911 | max_process_desc = inch; | |
d0d6b7c5 | 1912 | |
c7580538 KH |
1913 | if (!NILP (buffer) && NILP (XBUFFER (buffer)->enable_multibyte_characters) |
1914 | || NILP (buffer) && NILP (buffer_defaults.enable_multibyte_characters)) | |
1915 | { | |
1916 | XPROCESS (proc)->decode_coding_system = Qnil; | |
1917 | XPROCESS (proc)->encode_coding_system = Qnil; | |
1918 | } | |
1919 | else | |
1920 | { | |
1921 | /* Setup coding systems for communicating with the network stream. */ | |
1922 | struct gcpro gcpro1; | |
715f7577 | 1923 | /* Qt denotes we have not yet called Ffind_operation_coding_system. */ |
c7580538 KH |
1924 | Lisp_Object coding_systems = Qt; |
1925 | Lisp_Object args[5], val; | |
0fa1789e | 1926 | |
11f84d7d KH |
1927 | if (!NILP (Vcoding_system_for_read)) |
1928 | val = Vcoding_system_for_read; | |
1929 | else if (NILP (current_buffer->enable_multibyte_characters)) | |
1930 | /* We dare not decode end-of-line format by setting VAL to | |
1931 | Qemacs_mule, because the existing Emacs Lisp libraries | |
1932 | assume that they receive bare code including a sequene of | |
1933 | CR LF. */ | |
1934 | val = Qnil; | |
1935 | else | |
c7580538 KH |
1936 | { |
1937 | args[0] = Qopen_network_stream, args[1] = name, | |
1938 | args[2] = buffer, args[3] = host, args[4] = service; | |
1939 | GCPRO1 (proc); | |
715f7577 | 1940 | coding_systems = Ffind_operation_coding_system (5, args); |
c7580538 | 1941 | UNGCPRO; |
83502605 KH |
1942 | if (CONSP (coding_systems)) |
1943 | val = XCONS (coding_systems)->car; | |
1944 | else if (CONSP (Vdefault_process_coding_system)) | |
1945 | val = XCONS (Vdefault_process_coding_system)->car; | |
11f84d7d KH |
1946 | else |
1947 | val = Qnil; | |
c7580538 KH |
1948 | } |
1949 | XPROCESS (proc)->decode_coding_system = val; | |
0fa1789e | 1950 | |
11f84d7d KH |
1951 | if (!NILP (Vcoding_system_for_write)) |
1952 | val = Vcoding_system_for_write; | |
1953 | else if (NILP (current_buffer->enable_multibyte_characters)) | |
1954 | val = Qnil; | |
1955 | else | |
c7580538 KH |
1956 | { |
1957 | if (EQ (coding_systems, Qt)) | |
1958 | { | |
1959 | args[0] = Qopen_network_stream, args[1] = name, | |
1960 | args[2] = buffer, args[3] = host, args[4] = service; | |
1961 | GCPRO1 (proc); | |
715f7577 | 1962 | coding_systems = Ffind_operation_coding_system (5, args); |
c7580538 KH |
1963 | UNGCPRO; |
1964 | } | |
83502605 KH |
1965 | if (CONSP (coding_systems)) |
1966 | val = XCONS (coding_systems)->cdr; | |
1967 | else if (CONSP (Vdefault_process_coding_system)) | |
1968 | val = XCONS (Vdefault_process_coding_system)->cdr; | |
11f84d7d KH |
1969 | else |
1970 | val = Qnil; | |
c7580538 KH |
1971 | } |
1972 | XPROCESS (proc)->encode_coding_system = val; | |
1973 | } | |
0fa1789e | 1974 | |
c7580538 KH |
1975 | if (!proc_decode_coding_system[inch]) |
1976 | proc_decode_coding_system[inch] | |
1977 | = (struct coding_system *) xmalloc (sizeof (struct coding_system)); | |
0fa1789e | 1978 | setup_coding_system (XPROCESS (proc)->decode_coding_system, |
c7580538 KH |
1979 | proc_decode_coding_system[inch]); |
1980 | if (!proc_encode_coding_system[outch]) | |
1981 | proc_encode_coding_system[outch] | |
1982 | = (struct coding_system *) xmalloc (sizeof (struct coding_system)); | |
0fa1789e | 1983 | setup_coding_system (XPROCESS (proc)->encode_coding_system, |
c7580538 | 1984 | proc_encode_coding_system[outch]); |
0fa1789e KH |
1985 | |
1986 | XPROCESS (proc)->decoding_buf = make_uninit_string (0); | |
1987 | XPROCESS (proc)->encoding_buf = make_uninit_string (0); | |
1988 | ||
d0d6b7c5 JB |
1989 | UNGCPRO; |
1990 | return proc; | |
1991 | } | |
1992 | #endif /* HAVE_SOCKETS */ | |
1993 | ||
1994 | deactivate_process (proc) | |
1995 | Lisp_Object proc; | |
1996 | { | |
1997 | register int inchannel, outchannel; | |
1998 | register struct Lisp_Process *p = XPROCESS (proc); | |
1999 | ||
a9f2c884 RS |
2000 | inchannel = XINT (p->infd); |
2001 | outchannel = XINT (p->outfd); | |
d0d6b7c5 | 2002 | |
a9f2c884 | 2003 | if (inchannel >= 0) |
d0d6b7c5 JB |
2004 | { |
2005 | /* Beware SIGCHLD hereabouts. */ | |
2006 | flush_pending_output (inchannel); | |
2007 | #ifdef VMS | |
2008 | { | |
2009 | VMS_PROC_STUFF *get_vms_process_pointer (), *vs; | |
2010 | sys$dassgn (outchannel); | |
c6c6865d | 2011 | vs = get_vms_process_pointer (p->pid); |
d0d6b7c5 JB |
2012 | if (vs) |
2013 | give_back_vms_process_stuff (vs); | |
2014 | } | |
2015 | #else | |
2016 | close (inchannel); | |
a9f2c884 | 2017 | if (outchannel >= 0 && outchannel != inchannel) |
d0d6b7c5 JB |
2018 | close (outchannel); |
2019 | #endif | |
2020 | ||
1d056e64 KH |
2021 | XSETINT (p->infd, -1); |
2022 | XSETINT (p->outfd, -1); | |
d0d6b7c5 JB |
2023 | chan_process[inchannel] = Qnil; |
2024 | FD_CLR (inchannel, &input_wait_mask); | |
a69281ff | 2025 | FD_CLR (inchannel, &non_keyboard_wait_mask); |
7d0e672e RS |
2026 | if (inchannel == max_process_desc) |
2027 | { | |
2028 | int i; | |
2029 | /* We just closed the highest-numbered process input descriptor, | |
2030 | so recompute the highest-numbered one now. */ | |
2031 | max_process_desc = 0; | |
2032 | for (i = 0; i < MAXDESC; i++) | |
2033 | if (!NILP (chan_process[i])) | |
2034 | max_process_desc = i; | |
2035 | } | |
d0d6b7c5 JB |
2036 | } |
2037 | } | |
2038 | ||
2039 | /* Close all descriptors currently in use for communication | |
2040 | with subprocess. This is used in a newly-forked subprocess | |
2041 | to get rid of irrelevant descriptors. */ | |
2042 | ||
2043 | close_process_descs () | |
2044 | { | |
e98d950b | 2045 | #ifndef WINDOWSNT |
d0d6b7c5 JB |
2046 | int i; |
2047 | for (i = 0; i < MAXDESC; i++) | |
2048 | { | |
2049 | Lisp_Object process; | |
2050 | process = chan_process[i]; | |
2051 | if (!NILP (process)) | |
2052 | { | |
a9f2c884 RS |
2053 | int in = XINT (XPROCESS (process)->infd); |
2054 | int out = XINT (XPROCESS (process)->outfd); | |
2055 | if (in >= 0) | |
d0d6b7c5 | 2056 | close (in); |
a9f2c884 | 2057 | if (out >= 0 && in != out) |
d0d6b7c5 JB |
2058 | close (out); |
2059 | } | |
2060 | } | |
e98d950b | 2061 | #endif |
d0d6b7c5 JB |
2062 | } |
2063 | \f | |
2064 | DEFUN ("accept-process-output", Faccept_process_output, Saccept_process_output, | |
2065 | 0, 3, 0, | |
2066 | "Allow any pending output from subprocesses to be read by Emacs.\n\ | |
2067 | It is read into the process' buffers or given to their filter functions.\n\ | |
2068 | Non-nil arg PROCESS means do not return until some output has been received\n\ | |
2069 | from PROCESS.\n\ | |
2070 | Non-nil second arg TIMEOUT and third arg TIMEOUT-MSECS are number of\n\ | |
2071 | seconds and microseconds to wait; return after that much time whether\n\ | |
2072 | or not there is input.\n\ | |
2073 | Return non-nil iff we received any output before the timeout expired.") | |
4ee3e309 EN |
2074 | (process, timeout, timeout_msecs) |
2075 | register Lisp_Object process, timeout, timeout_msecs; | |
d0d6b7c5 JB |
2076 | { |
2077 | int seconds; | |
2078 | int useconds; | |
2079 | ||
2080 | if (! NILP (timeout_msecs)) | |
2081 | { | |
2082 | CHECK_NUMBER (timeout_msecs, 2); | |
2083 | useconds = XINT (timeout_msecs); | |
bcd69aea | 2084 | if (!INTEGERP (timeout)) |
1d056e64 | 2085 | XSETINT (timeout, 0); |
d0d6b7c5 JB |
2086 | |
2087 | { | |
2088 | int carry = useconds / 1000000; | |
2089 | ||
2090 | XSETINT (timeout, XINT (timeout) + carry); | |
2091 | useconds -= carry * 1000000; | |
2092 | ||
2093 | /* I think this clause is necessary because C doesn't | |
2094 | guarantee a particular rounding direction for negative | |
2095 | integers. */ | |
2096 | if (useconds < 0) | |
2097 | { | |
2098 | XSETINT (timeout, XINT (timeout) - 1); | |
2099 | useconds += 1000000; | |
2100 | } | |
2101 | } | |
2102 | } | |
de946e5a RS |
2103 | else |
2104 | useconds = 0; | |
d0d6b7c5 JB |
2105 | |
2106 | if (! NILP (timeout)) | |
2107 | { | |
2108 | CHECK_NUMBER (timeout, 1); | |
2109 | seconds = XINT (timeout); | |
ada9a4fd | 2110 | if (seconds < 0 || (seconds == 0 && useconds == 0)) |
d0d6b7c5 JB |
2111 | seconds = -1; |
2112 | } | |
2113 | else | |
2114 | { | |
4ee3e309 | 2115 | if (NILP (process)) |
d0d6b7c5 JB |
2116 | seconds = -1; |
2117 | else | |
2118 | seconds = 0; | |
2119 | } | |
2120 | ||
4ee3e309 EN |
2121 | if (NILP (process)) |
2122 | XSETFASTINT (process, 0); | |
f76475ad | 2123 | |
d0d6b7c5 | 2124 | return |
4ee3e309 | 2125 | (wait_reading_process_input (seconds, useconds, process, 0) |
d0d6b7c5 JB |
2126 | ? Qt : Qnil); |
2127 | } | |
2128 | ||
2129 | /* This variable is different from waiting_for_input in keyboard.c. | |
2130 | It is used to communicate to a lisp process-filter/sentinel (via the | |
2131 | function Fwaiting_for_user_input_p below) whether emacs was waiting | |
2132 | for user-input when that process-filter was called. | |
2133 | waiting_for_input cannot be used as that is by definition 0 when | |
d430ee71 RS |
2134 | lisp code is being evalled. |
2135 | This is also used in record_asynch_buffer_change. | |
2136 | For that purpose, this must be 0 | |
2137 | when not inside wait_reading_process_input. */ | |
d0d6b7c5 JB |
2138 | static int waiting_for_user_input_p; |
2139 | ||
c573ae8e RS |
2140 | /* This is here so breakpoints can be put on it. */ |
2141 | static | |
2142 | wait_reading_process_input_1 () | |
2143 | { | |
2144 | } | |
2145 | ||
d0d6b7c5 JB |
2146 | /* Read and dispose of subprocess output while waiting for timeout to |
2147 | elapse and/or keyboard input to be available. | |
2148 | ||
de6fd4b9 | 2149 | TIME_LIMIT is: |
d0d6b7c5 JB |
2150 | timeout in seconds, or |
2151 | zero for no limit, or | |
2152 | -1 means gobble data immediately available but don't wait for any. | |
2153 | ||
de6fd4b9 RS |
2154 | MICROSECS is: |
2155 | an additional duration to wait, measured in microseconds. | |
2156 | If this is nonzero and time_limit is 0, then the timeout | |
2157 | consists of MICROSECS only. | |
6e4f3667 | 2158 | |
de6fd4b9 | 2159 | READ_KBD is a lisp value: |
d0d6b7c5 JB |
2160 | 0 to ignore keyboard input, or |
2161 | 1 to return when input is available, or | |
84aa3ace | 2162 | -1 meaning caller will actually read the input, so don't throw to |
d0d6b7c5 | 2163 | the quit handler, or |
e6194ffc | 2164 | a cons cell, meaning wait until its car is non-nil |
de6fd4b9 | 2165 | (and gobble terminal input into the buffer if any arrives), or |
f76475ad JB |
2166 | a process object, meaning wait until something arrives from that |
2167 | process. The return value is true iff we read some input from | |
2168 | that process. | |
d0d6b7c5 | 2169 | |
de6fd4b9 | 2170 | DO_DISPLAY != 0 means redisplay should be done to show subprocess |
d0d6b7c5 JB |
2171 | output that arrives. |
2172 | ||
de6fd4b9 | 2173 | If READ_KBD is a pointer to a struct Lisp_Process, then the |
d0d6b7c5 JB |
2174 | function returns true iff we received input from that process |
2175 | before the timeout elapsed. | |
eb8c3be9 | 2176 | Otherwise, return true iff we received input from any process. */ |
d0d6b7c5 JB |
2177 | |
2178 | wait_reading_process_input (time_limit, microsecs, read_kbd, do_display) | |
f76475ad JB |
2179 | int time_limit, microsecs; |
2180 | Lisp_Object read_kbd; | |
2181 | int do_display; | |
d0d6b7c5 JB |
2182 | { |
2183 | register int channel, nfds, m; | |
2184 | static SELECT_TYPE Available; | |
2185 | int xerrno; | |
2186 | Lisp_Object proc; | |
2187 | EMACS_TIME timeout, end_time, garbage; | |
2188 | SELECT_TYPE Atemp; | |
a9f2c884 | 2189 | int wait_channel = -1; |
d0d6b7c5 JB |
2190 | struct Lisp_Process *wait_proc = 0; |
2191 | int got_some_input = 0; | |
84aa3ace | 2192 | Lisp_Object *wait_for_cell = 0; |
d0d6b7c5 JB |
2193 | |
2194 | FD_ZERO (&Available); | |
2195 | ||
f76475ad JB |
2196 | /* If read_kbd is a process to watch, set wait_proc and wait_channel |
2197 | accordingly. */ | |
bcd69aea | 2198 | if (PROCESSP (read_kbd)) |
d0d6b7c5 | 2199 | { |
f76475ad | 2200 | wait_proc = XPROCESS (read_kbd); |
a9f2c884 | 2201 | wait_channel = XINT (wait_proc->infd); |
22719df2 | 2202 | XSETFASTINT (read_kbd, 0); |
d0d6b7c5 JB |
2203 | } |
2204 | ||
84aa3ace | 2205 | /* If waiting for non-nil in a cell, record where. */ |
bcd69aea | 2206 | if (CONSP (read_kbd)) |
84aa3ace RS |
2207 | { |
2208 | wait_for_cell = &XCONS (read_kbd)->car; | |
22719df2 | 2209 | XSETFASTINT (read_kbd, 0); |
84aa3ace RS |
2210 | } |
2211 | ||
f76475ad | 2212 | waiting_for_user_input_p = XINT (read_kbd); |
d0d6b7c5 JB |
2213 | |
2214 | /* Since we may need to wait several times, | |
2215 | compute the absolute time to return at. */ | |
2216 | if (time_limit || microsecs) | |
2217 | { | |
2218 | EMACS_GET_TIME (end_time); | |
2219 | EMACS_SET_SECS_USECS (timeout, time_limit, microsecs); | |
2220 | EMACS_ADD_TIME (end_time, end_time, timeout); | |
2221 | } | |
e07d5449 KH |
2222 | #ifdef hpux |
2223 | /* AlainF 5-Jul-1996 | |
2224 | HP-UX 10.10 seem to have problems with signals coming in | |
2225 | Causes "poll: interrupted system call" messages when Emacs is run | |
2226 | in an X window | |
2227 | Turn off periodic alarms (in case they are in use) */ | |
2228 | stop_polling (); | |
2229 | #endif | |
d0d6b7c5 | 2230 | |
d0d6b7c5 JB |
2231 | while (1) |
2232 | { | |
c0239a0b RS |
2233 | int timeout_reduced_for_timers = 0; |
2234 | ||
d0d6b7c5 JB |
2235 | /* If calling from keyboard input, do not quit |
2236 | since we want to return C-g as an input character. | |
2237 | Otherwise, do pending quit if requested. */ | |
f76475ad | 2238 | if (XINT (read_kbd) >= 0) |
d0d6b7c5 JB |
2239 | QUIT; |
2240 | ||
889255b4 RS |
2241 | /* Exit now if the cell we're waiting for became non-nil. */ |
2242 | if (wait_for_cell && ! NILP (*wait_for_cell)) | |
2243 | break; | |
2244 | ||
d0d6b7c5 JB |
2245 | /* Compute time from now till when time limit is up */ |
2246 | /* Exit if already run out */ | |
2247 | if (time_limit == -1) | |
2248 | { | |
2249 | /* -1 specified for timeout means | |
2250 | gobble output available now | |
2251 | but don't wait at all. */ | |
2252 | ||
2253 | EMACS_SET_SECS_USECS (timeout, 0, 0); | |
2254 | } | |
2255 | else if (time_limit || microsecs) | |
2256 | { | |
2257 | EMACS_GET_TIME (timeout); | |
2258 | EMACS_SUB_TIME (timeout, end_time, timeout); | |
2259 | if (EMACS_TIME_NEG_P (timeout)) | |
2260 | break; | |
2261 | } | |
2262 | else | |
2263 | { | |
2264 | EMACS_SET_SECS_USECS (timeout, 100000, 0); | |
2265 | } | |
2266 | ||
f854a00b RS |
2267 | /* Normally we run timers here. |
2268 | But not if wait_for_cell; in those cases, | |
2269 | the wait is supposed to be short, | |
2270 | and those callers cannot handle running arbitrary Lisp code here. */ | |
2271 | if (! wait_for_cell) | |
fb4c3627 | 2272 | { |
c0239a0b | 2273 | EMACS_TIME timer_delay; |
c573ae8e RS |
2274 | int old_timers_run; |
2275 | ||
2276 | retry: | |
2277 | old_timers_run = timers_run; | |
c0239a0b | 2278 | timer_delay = timer_check (1); |
5de50bfb | 2279 | if (timers_run != old_timers_run && do_display) |
c573ae8e RS |
2280 | { |
2281 | redisplay_preserve_echo_area (); | |
2282 | /* We must retry, since a timer may have requeued itself | |
2283 | and that could alter the time_delay. */ | |
2284 | goto retry; | |
2285 | } | |
2286 | ||
69645afc RS |
2287 | /* If there is unread keyboard input, also return. */ |
2288 | if (XINT (read_kbd) != 0 | |
2289 | && requeued_events_pending_p ()) | |
2290 | break; | |
2291 | ||
c0239a0b | 2292 | if (! EMACS_TIME_NEG_P (timer_delay) && time_limit != -1) |
fb4c3627 RS |
2293 | { |
2294 | EMACS_TIME difference; | |
2295 | EMACS_SUB_TIME (difference, timer_delay, timeout); | |
2296 | if (EMACS_TIME_NEG_P (difference)) | |
c0239a0b RS |
2297 | { |
2298 | timeout = timer_delay; | |
2299 | timeout_reduced_for_timers = 1; | |
2300 | } | |
fb4c3627 | 2301 | } |
4abca5e7 RS |
2302 | /* If time_limit is -1, we are not going to wait at all. */ |
2303 | else if (time_limit != -1) | |
c573ae8e RS |
2304 | { |
2305 | /* This is so a breakpoint can be put here. */ | |
2306 | wait_reading_process_input_1 (); | |
2307 | } | |
fb4c3627 RS |
2308 | } |
2309 | ||
90ab1a81 JB |
2310 | /* Cause C-g and alarm signals to take immediate action, |
2311 | and cause input available signals to zero out timeout. | |
2312 | ||
2313 | It is important that we do this before checking for process | |
2314 | activity. If we get a SIGCHLD after the explicit checks for | |
2315 | process activity, timeout is the only way we will know. */ | |
2316 | if (XINT (read_kbd) < 0) | |
2317 | set_waiting_for_input (&timeout); | |
2318 | ||
6be429b1 JB |
2319 | /* If status of something has changed, and no input is |
2320 | available, notify the user of the change right away. After | |
2321 | this explicit check, we'll let the SIGCHLD handler zap | |
2322 | timeout to get our attention. */ | |
2323 | if (update_tick != process_tick && do_display) | |
2324 | { | |
2325 | Atemp = input_wait_mask; | |
2326 | EMACS_SET_SECS_USECS (timeout, 0, 0); | |
0c9960e9 RS |
2327 | if ((select (max (max_process_desc, max_keyboard_desc) + 1, |
2328 | &Atemp, (SELECT_TYPE *)0, (SELECT_TYPE *)0, | |
ecd1f654 KH |
2329 | &timeout) |
2330 | <= 0)) | |
90ab1a81 JB |
2331 | { |
2332 | /* It's okay for us to do this and then continue with | |
a0e4d3f3 | 2333 | the loop, since timeout has already been zeroed out. */ |
90ab1a81 JB |
2334 | clear_waiting_for_input (); |
2335 | status_notify (); | |
2336 | } | |
6be429b1 JB |
2337 | } |
2338 | ||
2339 | /* Don't wait for output from a non-running process. */ | |
2340 | if (wait_proc != 0 && !NILP (wait_proc->raw_status_low)) | |
2341 | update_status (wait_proc); | |
2342 | if (wait_proc != 0 | |
2343 | && ! EQ (wait_proc->status, Qrun)) | |
9aa2a7f4 | 2344 | { |
215b45e9 | 2345 | int nread, total_nread = 0; |
7ce63188 | 2346 | |
9aa2a7f4 | 2347 | clear_waiting_for_input (); |
7ce63188 RS |
2348 | XSETPROCESS (proc, wait_proc); |
2349 | ||
2350 | /* Read data from the process, until we exhaust it. */ | |
1c0707fd | 2351 | while (XINT (wait_proc->infd) >= 0 |
97a084c1 RS |
2352 | && (nread |
2353 | = read_process_output (proc, XINT (wait_proc->infd)))) | |
215b45e9 RS |
2354 | { |
2355 | if (0 < nread) | |
2356 | total_nread += nread; | |
2357 | #ifdef EIO | |
2358 | else if (nread == -1 && EIO == errno) | |
2359 | break; | |
2360 | #endif | |
2361 | } | |
7ce63188 RS |
2362 | if (total_nread > 0 && do_display) |
2363 | redisplay_preserve_echo_area (); | |
2364 | ||
9aa2a7f4 JB |
2365 | break; |
2366 | } | |
6be429b1 | 2367 | |
d0d6b7c5 JB |
2368 | /* Wait till there is something to do */ |
2369 | ||
b5dc1c83 RS |
2370 | if (wait_for_cell) |
2371 | Available = non_process_wait_mask; | |
2372 | else if (! XINT (read_kbd)) | |
a69281ff RS |
2373 | Available = non_keyboard_wait_mask; |
2374 | else | |
2375 | Available = input_wait_mask; | |
d0d6b7c5 | 2376 | |
ff11dfa1 | 2377 | /* If frame size has changed or the window is newly mapped, |
ffd56f97 JB |
2378 | redisplay now, before we start to wait. There is a race |
2379 | condition here; if a SIGIO arrives between now and the select | |
016899c0 JB |
2380 | and indicates that a frame is trashed, the select may block |
2381 | displaying a trashed screen. */ | |
5164ee8e | 2382 | if (frame_garbaged && do_display) |
7286affd RS |
2383 | { |
2384 | clear_waiting_for_input (); | |
2385 | redisplay_preserve_echo_area (); | |
2386 | if (XINT (read_kbd) < 0) | |
7efe788e | 2387 | set_waiting_for_input (&timeout); |
7286affd | 2388 | } |
ffd56f97 | 2389 | |
0a65b032 RS |
2390 | if (XINT (read_kbd) && detect_input_pending ()) |
2391 | { | |
2392 | nfds = 0; | |
2393 | FD_ZERO (&Available); | |
2394 | } | |
2395 | else | |
0c9960e9 RS |
2396 | nfds = select (max (max_process_desc, max_keyboard_desc) + 1, |
2397 | &Available, (SELECT_TYPE *)0, (SELECT_TYPE *)0, | |
0a65b032 | 2398 | &timeout); |
6720a7fb | 2399 | |
d0d6b7c5 JB |
2400 | xerrno = errno; |
2401 | ||
2402 | /* Make C-g and alarm signals set flags again */ | |
2403 | clear_waiting_for_input (); | |
2404 | ||
2405 | /* If we woke up due to SIGWINCH, actually change size now. */ | |
2406 | do_pending_window_change (); | |
2407 | ||
c0239a0b RS |
2408 | if (time_limit && nfds == 0 && ! timeout_reduced_for_timers) |
2409 | /* We wanted the full specified time, so return now. */ | |
d0d6b7c5 JB |
2410 | break; |
2411 | if (nfds < 0) | |
2412 | { | |
2413 | if (xerrno == EINTR) | |
2414 | FD_ZERO (&Available); | |
b0310da4 JB |
2415 | #ifdef ultrix |
2416 | /* Ultrix select seems to return ENOMEM when it is | |
2417 | interrupted. Treat it just like EINTR. Bleah. Note | |
2418 | that we want to test for the "ultrix" CPP symbol, not | |
2419 | "__ultrix__"; the latter is only defined under GCC, but | |
2420 | not by DEC's bundled CC. -JimB */ | |
8058415c JB |
2421 | else if (xerrno == ENOMEM) |
2422 | FD_ZERO (&Available); | |
2423 | #endif | |
d0d6b7c5 JB |
2424 | #ifdef ALLIANT |
2425 | /* This happens for no known reason on ALLIANT. | |
2426 | I am guessing that this is the right response. -- RMS. */ | |
2427 | else if (xerrno == EFAULT) | |
2428 | FD_ZERO (&Available); | |
2429 | #endif | |
2430 | else if (xerrno == EBADF) | |
2431 | { | |
2432 | #ifdef AIX | |
2433 | /* AIX doesn't handle PTY closure the same way BSD does. On AIX, | |
2434 | the child's closure of the pts gives the parent a SIGHUP, and | |
2435 | the ptc file descriptor is automatically closed, | |
2436 | yielding EBADF here or at select() call above. | |
2437 | So, SIGHUP is ignored (see def of PTY_TTY_NAME_SPRINTF | |
a0e4d3f3 | 2438 | in m/ibmrt-aix.h), and here we just ignore the select error. |
d0d6b7c5 | 2439 | Cleanup occurs c/o status_notify after SIGCLD. */ |
ffd56f97 | 2440 | FD_ZERO (&Available); /* Cannot depend on values returned */ |
d0d6b7c5 JB |
2441 | #else |
2442 | abort (); | |
2443 | #endif | |
2444 | } | |
2445 | else | |
6ed6233b | 2446 | error ("select error: %s", strerror (xerrno)); |
d0d6b7c5 | 2447 | } |
26ec91de | 2448 | #if defined(sun) && !defined(USG5_4) |
a69281ff | 2449 | else if (nfds > 0 && keyboard_bit_set (&Available) |
dd2281ae | 2450 | && interrupt_input) |
e0109153 JB |
2451 | /* System sometimes fails to deliver SIGIO. |
2452 | ||
2453 | David J. Mackenzie says that Emacs doesn't compile under | |
2454 | Solaris if this code is enabled, thus the USG5_4 in the CPP | |
2455 | conditional. "I haven't noticed any ill effects so far. | |
2456 | If you find a Solaris expert somewhere, they might know | |
2457 | better." */ | |
d0d6b7c5 JB |
2458 | kill (getpid (), SIGIO); |
2459 | #endif | |
2460 | ||
5d5beb62 RS |
2461 | #if 0 /* When polling is used, interrupt_input is 0, |
2462 | so get_input_pending should read the input. | |
2463 | So this should not be needed. */ | |
2464 | /* If we are using polling for input, | |
2465 | and we see input available, make it get read now. | |
2466 | Otherwise it might not actually get read for a second. | |
2467 | And on hpux, since we turn off polling in wait_reading_process_input, | |
2468 | it might never get read at all if we don't spend much time | |
2469 | outside of wait_reading_process_input. */ | |
2470 | if (XINT (read_kbd) && interrupt_input | |
2471 | && keyboard_bit_set (&Available) | |
2472 | && input_polling_used ()) | |
2473 | kill (getpid (), SIGALRM); | |
2474 | #endif | |
2475 | ||
d0d6b7c5 JB |
2476 | /* Check for keyboard input */ |
2477 | /* If there is any, return immediately | |
2478 | to give it higher priority than subprocesses */ | |
2479 | ||
77e1b3d4 | 2480 | if (XINT (read_kbd) != 0 |
5d6c2aa3 | 2481 | && detect_input_pending_run_timers (do_display)) |
6ed6233b KH |
2482 | { |
2483 | swallow_events (do_display); | |
5d6c2aa3 | 2484 | if (detect_input_pending_run_timers (do_display)) |
6ed6233b KH |
2485 | break; |
2486 | } | |
2487 | ||
69645afc RS |
2488 | /* If there is unread keyboard input, also return. */ |
2489 | if (XINT (read_kbd) != 0 | |
2490 | && requeued_events_pending_p ()) | |
2491 | break; | |
2492 | ||
77e1b3d4 RS |
2493 | /* If we are not checking for keyboard input now, |
2494 | do process events (but don't run any timers). | |
2495 | This is so that X events will be processed. | |
0c9960e9 | 2496 | Otherwise they may have to wait until polling takes place. |
77e1b3d4 RS |
2497 | That would causes delays in pasting selections, for example. |
2498 | ||
2499 | (We used to do this only if wait_for_cell.) */ | |
2500 | if (XINT (read_kbd) == 0 && detect_input_pending ()) | |
f854a00b RS |
2501 | { |
2502 | swallow_events (do_display); | |
0c9960e9 | 2503 | #if 0 /* Exiting when read_kbd doesn't request that seems wrong, though. */ |
f854a00b RS |
2504 | if (detect_input_pending ()) |
2505 | break; | |
5d5beb62 | 2506 | #endif |
0c9960e9 | 2507 | } |
f854a00b | 2508 | |
84aa3ace RS |
2509 | /* Exit now if the cell we're waiting for became non-nil. */ |
2510 | if (wait_for_cell && ! NILP (*wait_for_cell)) | |
2511 | break; | |
2512 | ||
4746118a | 2513 | #ifdef SIGIO |
5d5beb62 | 2514 | /* If we think we have keyboard input waiting, but didn't get SIGIO, |
d0d6b7c5 JB |
2515 | go read it. This can happen with X on BSD after logging out. |
2516 | In that case, there really is no input and no SIGIO, | |
2517 | but select says there is input. */ | |
2518 | ||
dd2281ae | 2519 | if (XINT (read_kbd) && interrupt_input |
5d5beb62 | 2520 | && keyboard_bit_set (&Available)) |
e643c5be | 2521 | kill (getpid (), SIGIO); |
4746118a | 2522 | #endif |
d0d6b7c5 | 2523 | |
d0d6b7c5 JB |
2524 | if (! wait_proc) |
2525 | got_some_input |= nfds > 0; | |
2526 | ||
32676c08 JB |
2527 | /* If checking input just got us a size-change event from X, |
2528 | obey it now if we should. */ | |
97f3b3d6 | 2529 | if (XINT (read_kbd) || wait_for_cell) |
32676c08 JB |
2530 | do_pending_window_change (); |
2531 | ||
a9f2c884 RS |
2532 | /* Check for data from a process. */ |
2533 | /* Really FIRST_PROC_DESC should be 0 on Unix, | |
2534 | but this is safer in the short run. */ | |
a69281ff | 2535 | for (channel = 0; channel <= max_process_desc; channel++) |
d0d6b7c5 | 2536 | { |
a69281ff RS |
2537 | if (FD_ISSET (channel, &Available) |
2538 | && FD_ISSET (channel, &non_keyboard_wait_mask)) | |
d0d6b7c5 JB |
2539 | { |
2540 | int nread; | |
2541 | ||
2542 | /* If waiting for this channel, arrange to return as | |
2543 | soon as no more input to be processed. No more | |
2544 | waiting. */ | |
2545 | if (wait_channel == channel) | |
2546 | { | |
a9f2c884 | 2547 | wait_channel = -1; |
d0d6b7c5 JB |
2548 | time_limit = -1; |
2549 | got_some_input = 1; | |
2550 | } | |
2551 | proc = chan_process[channel]; | |
2552 | if (NILP (proc)) | |
2553 | continue; | |
2554 | ||
d0d6b7c5 JB |
2555 | /* Read data from the process, starting with our |
2556 | buffered-ahead character if we have one. */ | |
2557 | ||
2558 | nread = read_process_output (proc, channel); | |
2559 | if (nread > 0) | |
2560 | { | |
2561 | /* Since read_process_output can run a filter, | |
2562 | which can call accept-process-output, | |
2563 | don't try to read from any other processes | |
2564 | before doing the select again. */ | |
2565 | FD_ZERO (&Available); | |
2566 | ||
2567 | if (do_display) | |
2568 | redisplay_preserve_echo_area (); | |
2569 | } | |
2570 | #ifdef EWOULDBLOCK | |
2571 | else if (nread == -1 && errno == EWOULDBLOCK) | |
2572 | ; | |
0b75e9a4 | 2573 | #endif |
89d7280d RS |
2574 | /* ISC 4.1 defines both EWOULDBLOCK and O_NONBLOCK, |
2575 | and Emacs uses O_NONBLOCK, so what we get is EAGAIN. */ | |
d0d6b7c5 JB |
2576 | #ifdef O_NONBLOCK |
2577 | else if (nread == -1 && errno == EAGAIN) | |
2578 | ; | |
2579 | #else | |
2580 | #ifdef O_NDELAY | |
2581 | else if (nread == -1 && errno == EAGAIN) | |
2582 | ; | |
2583 | /* Note that we cannot distinguish between no input | |
2584 | available now and a closed pipe. | |
2585 | With luck, a closed pipe will be accompanied by | |
2586 | subprocess termination and SIGCHLD. */ | |
2587 | else if (nread == 0 && !NETCONN_P (proc)) | |
2588 | ; | |
ffd56f97 JB |
2589 | #endif /* O_NDELAY */ |
2590 | #endif /* O_NONBLOCK */ | |
d0d6b7c5 JB |
2591 | #ifdef HAVE_PTYS |
2592 | /* On some OSs with ptys, when the process on one end of | |
2593 | a pty exits, the other end gets an error reading with | |
2594 | errno = EIO instead of getting an EOF (0 bytes read). | |
2595 | Therefore, if we get an error reading and errno = | |
2596 | EIO, just continue, because the child process has | |
2597 | exited and should clean itself up soon (e.g. when we | |
2598 | get a SIGCHLD). */ | |
2599 | else if (nread == -1 && errno == EIO) | |
2600 | ; | |
ffd56f97 JB |
2601 | #endif /* HAVE_PTYS */ |
2602 | /* If we can detect process termination, don't consider the process | |
2603 | gone just because its pipe is closed. */ | |
d0d6b7c5 JB |
2604 | #ifdef SIGCHLD |
2605 | else if (nread == 0 && !NETCONN_P (proc)) | |
2606 | ; | |
2607 | #endif | |
2608 | else | |
2609 | { | |
2610 | /* Preserve status of processes already terminated. */ | |
2611 | XSETINT (XPROCESS (proc)->tick, ++process_tick); | |
2612 | deactivate_process (proc); | |
2613 | if (!NILP (XPROCESS (proc)->raw_status_low)) | |
2614 | update_status (XPROCESS (proc)); | |
2615 | if (EQ (XPROCESS (proc)->status, Qrun)) | |
2616 | XPROCESS (proc)->status | |
2617 | = Fcons (Qexit, Fcons (make_number (256), Qnil)); | |
2618 | } | |
2619 | } | |
ffd56f97 JB |
2620 | } /* end for each file descriptor */ |
2621 | } /* end while exit conditions not met */ | |
d0d6b7c5 | 2622 | |
d430ee71 RS |
2623 | waiting_for_user_input_p = 0; |
2624 | ||
ffd56f97 JB |
2625 | /* If calling from keyboard input, do not quit |
2626 | since we want to return C-g as an input character. | |
2627 | Otherwise, do pending quit if requested. */ | |
f76475ad | 2628 | if (XINT (read_kbd) >= 0) |
ffd56f97 JB |
2629 | { |
2630 | /* Prevent input_pending from remaining set if we quit. */ | |
2631 | clear_input_pending (); | |
2632 | QUIT; | |
2633 | } | |
e07d5449 KH |
2634 | #ifdef hpux |
2635 | /* AlainF 5-Jul-1996 | |
2636 | HP-UX 10.10 seems to have problems with signals coming in | |
2637 | Causes "poll: interrupted system call" messages when Emacs is run | |
2638 | in an X window | |
2639 | Turn periodic alarms back on */ | |
5d5beb62 | 2640 | start_polling (); |
e07d5449 KH |
2641 | #endif |
2642 | ||
d0d6b7c5 JB |
2643 | return got_some_input; |
2644 | } | |
2645 | \f | |
3b9a3dfa RS |
2646 | /* Given a list (FUNCTION ARGS...), apply FUNCTION to the ARGS. */ |
2647 | ||
2648 | static Lisp_Object | |
2649 | read_process_output_call (fun_and_args) | |
2650 | Lisp_Object fun_and_args; | |
2651 | { | |
2652 | return apply1 (XCONS (fun_and_args)->car, XCONS (fun_and_args)->cdr); | |
2653 | } | |
2654 | ||
2655 | static Lisp_Object | |
2656 | read_process_output_error_handler (error) | |
2657 | Lisp_Object error; | |
2658 | { | |
2659 | cmd_error_internal (error, "error in process filter: "); | |
2660 | Vinhibit_quit = Qt; | |
2661 | update_echo_area (); | |
833ba342 | 2662 | Fsleep_for (make_number (2), Qnil); |
3b9a3dfa RS |
2663 | } |
2664 | ||
d0d6b7c5 JB |
2665 | /* Read pending output from the process channel, |
2666 | starting with our buffered-ahead character if we have one. | |
0fa1789e | 2667 | Yield number of decoded characters read. |
d0d6b7c5 JB |
2668 | |
2669 | This function reads at most 1024 characters. | |
2670 | If you want to read all available subprocess output, | |
0fa1789e KH |
2671 | you must call it repeatedly until it returns zero. |
2672 | ||
2673 | The characters read are decoded according to PROC's coding-system | |
2674 | for decoding. */ | |
d0d6b7c5 JB |
2675 | |
2676 | read_process_output (proc, channel) | |
2677 | Lisp_Object proc; | |
2678 | register int channel; | |
2679 | { | |
2680 | register int nchars; | |
d0d6b7c5 | 2681 | char *chars; |
0fa1789e KH |
2682 | #ifdef VMS |
2683 | int chars_allocated = 0; /* If 1, `chars' should be freed later. */ | |
d0d6b7c5 | 2684 | #else |
0fa1789e | 2685 | char buf[1024]; |
d0d6b7c5 JB |
2686 | #endif |
2687 | register Lisp_Object outstream; | |
2688 | register struct buffer *old = current_buffer; | |
2689 | register struct Lisp_Process *p = XPROCESS (proc); | |
2690 | register int opoint; | |
c7580538 | 2691 | struct coding_system *coding = proc_decode_coding_system[channel]; |
0fa1789e KH |
2692 | int chars_in_decoding_buf = 0; /* If 1, `chars' points |
2693 | XSTRING (p->decoding_buf)->data. */ | |
d0d6b7c5 JB |
2694 | |
2695 | #ifdef VMS | |
2696 | VMS_PROC_STUFF *vs, *get_vms_process_pointer(); | |
2697 | ||
2698 | vs = get_vms_process_pointer (p->pid); | |
2699 | if (vs) | |
2700 | { | |
2701 | if (!vs->iosb[0]) | |
2702 | return(0); /* Really weird if it does this */ | |
2703 | if (!(vs->iosb[0] & 1)) | |
2704 | return -1; /* I/O error */ | |
2705 | } | |
2706 | else | |
2707 | error ("Could not get VMS process pointer"); | |
2708 | chars = vs->inputBuffer; | |
2709 | nchars = clean_vms_buffer (chars, vs->iosb[1]); | |
2710 | if (nchars <= 0) | |
2711 | { | |
2712 | start_vms_process_read (vs); /* Crank up the next read on the process */ | |
2713 | return 1; /* Nothing worth printing, say we got 1 */ | |
2714 | } | |
0fa1789e KH |
2715 | if (coding->carryover_size) |
2716 | { | |
2717 | /* The data carried over in the previous decoding should be | |
2718 | prepended to the new data read to decode all together. */ | |
2719 | char *buf = (char *) xmalloc (nchars + coding->carryover_size); | |
2720 | ||
2721 | bcopy (coding->carryover, buf, coding->carryover_size); | |
2722 | bcopy (chars, buf + coding->carryover_size, nchars); | |
2723 | chars = buf; | |
2724 | chars_allocated = 1; | |
2725 | } | |
d0d6b7c5 JB |
2726 | #else /* not VMS */ |
2727 | ||
0fa1789e KH |
2728 | if (coding->carryover_size) |
2729 | /* The data carried over in the previous decoding should be | |
2730 | prepended to the new data read to decode all together. */ | |
2731 | bcopy (coding->carryover, buf, coding->carryover_size); | |
2732 | ||
d0d6b7c5 | 2733 | if (proc_buffered_char[channel] < 0) |
1bac7c84 RS |
2734 | nchars = read (channel, buf + coding->carryover_size, |
2735 | (sizeof buf) - coding->carryover_size); | |
d0d6b7c5 JB |
2736 | else |
2737 | { | |
0fa1789e | 2738 | buf[coding->carryover_size] = proc_buffered_char[channel]; |
d0d6b7c5 | 2739 | proc_buffered_char[channel] = -1; |
1bac7c84 RS |
2740 | nchars = read (channel, buf + coding->carryover_size + 1, |
2741 | (sizeof buf) - coding->carryover_size - 1); | |
d0d6b7c5 JB |
2742 | if (nchars < 0) |
2743 | nchars = 1; | |
2744 | else | |
2745 | nchars = nchars + 1; | |
2746 | } | |
0fa1789e | 2747 | chars = buf; |
d0d6b7c5 JB |
2748 | #endif /* not VMS */ |
2749 | ||
0fa1789e KH |
2750 | /* At this point, NCHARS holds number of characters just received |
2751 | (including the one in proc_buffered_char[channel]). */ | |
d0d6b7c5 JB |
2752 | if (nchars <= 0) return nchars; |
2753 | ||
0fa1789e KH |
2754 | /* Now set NCHARS how many bytes we must decode. */ |
2755 | nchars += coding->carryover_size; | |
2756 | ||
71a4b3e8 | 2757 | if (! CODING_REQUIRE_NO_CONVERSION (coding)) |
0fa1789e KH |
2758 | { |
2759 | int require = decoding_buffer_size (coding, nchars); | |
2760 | int consumed, produced; | |
2761 | ||
2762 | if (XSTRING (p->decoding_buf)->size < require) | |
2763 | p->decoding_buf = make_uninit_string (require); | |
2764 | produced = decode_coding (coding, chars, XSTRING (p->decoding_buf)->data, | |
2765 | nchars, XSTRING (p->decoding_buf)->size, | |
2766 | &consumed); | |
2767 | ||
2768 | /* New coding-system might be found by `decode_coding'. */ | |
2769 | if (!EQ (p->decode_coding_system, coding->symbol)) | |
2770 | { | |
2771 | p->decode_coding_system = coding->symbol; | |
77e1b3d4 RS |
2772 | |
2773 | /* Don't call setup_coding_system for | |
2774 | proc_decode_coding_system[channel] here. It is done in | |
2775 | detect_coding called via decode_coding above. */ | |
2776 | ||
0fa1789e KH |
2777 | /* If coding-system for encoding is not yet decided, we set it |
2778 | as the same as coding-system for decoding. */ | |
2779 | if (NILP (p->encode_coding_system)) | |
2780 | { | |
2781 | p->encode_coding_system = coding->symbol; | |
2782 | setup_coding_system (coding->symbol, | |
e9c509cd | 2783 | proc_encode_coding_system[p->outfd]); |
0fa1789e KH |
2784 | } |
2785 | } | |
2786 | #ifdef VMS | |
2787 | /* Now we don't need the contents of `chars'. */ | |
2788 | if (chars_allocated) | |
2789 | free (chars); | |
2790 | #endif | |
2791 | if (produced == 0) | |
2792 | return 0; | |
d7223684 | 2793 | chars = (char *) XSTRING (p->decoding_buf)->data; |
0fa1789e KH |
2794 | nchars = produced; |
2795 | chars_in_decoding_buf = 1; | |
2796 | } | |
2797 | #ifdef VMS | |
2798 | else if (chars_allocated) | |
2799 | { | |
2800 | /* Although we don't have to decode the received data, we must | |
2801 | move it to an area which we don't have to free. */ | |
2802 | if (! STRINGP (p->decoding_buf) | |
2803 | || XSTRING (p->decoding_buf)->size < nchars) | |
2804 | p->decoding_buf = make_uninit_string (nchars); | |
2805 | bcopy (chars, XSTRING (p->decoding_buf)->data, nchars); | |
2806 | free (chars); | |
2807 | chars = XSTRING (p->decoding_buf)->data; | |
2808 | chars_in_decoding_buf = 1; | |
2809 | } | |
2810 | #endif | |
2811 | ||
d0d6b7c5 JB |
2812 | outstream = p->filter; |
2813 | if (!NILP (outstream)) | |
2814 | { | |
2815 | /* We inhibit quit here instead of just catching it so that | |
2816 | hitting ^G when a filter happens to be running won't screw | |
2817 | it up. */ | |
2818 | int count = specpdl_ptr - specpdl; | |
30c78175 | 2819 | Lisp_Object odeactivate; |
dfc21838 | 2820 | Lisp_Object obuffer, okeymap; |
4da2f5be | 2821 | int outer_running_asynch_code = running_asynch_code; |
30c78175 | 2822 | |
dfc21838 RS |
2823 | /* No need to gcpro these, because all we do with them later |
2824 | is test them for EQness, and none of them should be a string. */ | |
30c78175 | 2825 | odeactivate = Vdeactivate_mark; |
dfc21838 RS |
2826 | XSETBUFFER (obuffer, current_buffer); |
2827 | okeymap = current_buffer->keymap; | |
30c78175 | 2828 | |
d0d6b7c5 | 2829 | specbind (Qinhibit_quit, Qt); |
6545aada | 2830 | specbind (Qlast_nonmenu_event, Qt); |
3b9a3dfa | 2831 | |
4da2f5be RS |
2832 | /* In case we get recursively called, |
2833 | and we already saved the match data nonrecursively, | |
2834 | save the same match data in safely recursive fashion. */ | |
2835 | if (outer_running_asynch_code) | |
2836 | { | |
2837 | Lisp_Object tem; | |
2838 | /* Don't clobber the CURRENT match data, either! */ | |
dd130227 | 2839 | tem = Fmatch_data (Qnil, Qnil); |
4da2f5be | 2840 | restore_match_data (); |
dd130227 | 2841 | record_unwind_protect (Fstore_match_data, Fmatch_data (Qnil, Qnil)); |
4da2f5be RS |
2842 | Fstore_match_data (tem); |
2843 | } | |
2844 | ||
2845 | /* For speed, if a search happens within this code, | |
2846 | save the match data in a special nonrecursive fashion. */ | |
7074fde6 | 2847 | running_asynch_code = 1; |
4da2f5be RS |
2848 | |
2849 | /* Read and dispose of the process output. */ | |
3b9a3dfa RS |
2850 | internal_condition_case_1 (read_process_output_call, |
2851 | Fcons (outstream, | |
2852 | Fcons (proc, | |
7074fde6 FP |
2853 | Fcons (make_string (chars, |
2854 | nchars), | |
3b9a3dfa RS |
2855 | Qnil))), |
2856 | !NILP (Vdebug_on_error) ? Qnil : Qerror, | |
2857 | read_process_output_error_handler); | |
4da2f5be RS |
2858 | |
2859 | /* If we saved the match data nonrecursively, restore it now. */ | |
7074fde6 | 2860 | restore_match_data (); |
4da2f5be | 2861 | running_asynch_code = outer_running_asynch_code; |
d0d6b7c5 | 2862 | |
592ce97f | 2863 | /* Handling the process output should not deactivate the mark. */ |
30c78175 RS |
2864 | Vdeactivate_mark = odeactivate; |
2865 | ||
7973cfa8 RS |
2866 | #if 0 /* Call record_asynch_buffer_change unconditionally, |
2867 | because we might have changed minor modes or other things | |
2868 | that affect key bindings. */ | |
dfc21838 RS |
2869 | if (! EQ (Fcurrent_buffer (), obuffer) |
2870 | || ! EQ (current_buffer->keymap, okeymap)) | |
7973cfa8 | 2871 | #endif |
927e08be RS |
2872 | /* But do it only if the caller is actually going to read events. |
2873 | Otherwise there's no need to make him wake up, and it could | |
2874 | cause trouble (for example it would make Fsit_for return). */ | |
2875 | if (waiting_for_user_input_p == -1) | |
2876 | record_asynch_buffer_change (); | |
d72534ba | 2877 | |
d0d6b7c5 JB |
2878 | #ifdef VMS |
2879 | start_vms_process_read (vs); | |
2880 | #endif | |
2ea6d561 | 2881 | unbind_to (count, Qnil); |
d0d6b7c5 JB |
2882 | return nchars; |
2883 | } | |
2884 | ||
2885 | /* If no filter, write into buffer if it isn't dead. */ | |
2886 | if (!NILP (p->buffer) && !NILP (XBUFFER (p->buffer)->name)) | |
2887 | { | |
b0310da4 | 2888 | Lisp_Object old_read_only; |
12ca5cdf | 2889 | int old_begv, old_zv; |
30c78175 | 2890 | Lisp_Object odeactivate; |
12ca5cdf | 2891 | int before; |
30c78175 RS |
2892 | |
2893 | odeactivate = Vdeactivate_mark; | |
d0d6b7c5 JB |
2894 | |
2895 | Fset_buffer (p->buffer); | |
6ec8bbd2 | 2896 | opoint = PT; |
b0310da4 | 2897 | old_read_only = current_buffer->read_only; |
12ca5cdf RS |
2898 | old_begv = BEGV; |
2899 | old_zv = ZV; | |
b0310da4 JB |
2900 | |
2901 | current_buffer->read_only = Qnil; | |
d0d6b7c5 JB |
2902 | |
2903 | /* Insert new output into buffer | |
2904 | at the current end-of-output marker, | |
2905 | thus preserving logical ordering of input and output. */ | |
2906 | if (XMARKER (p->mark)->buffer) | |
53aad33f | 2907 | SET_PT (clip_to_bounds (BEGV, marker_position (p->mark), ZV)); |
d0d6b7c5 JB |
2908 | else |
2909 | SET_PT (ZV); | |
12ca5cdf | 2910 | before = PT; |
b0310da4 JB |
2911 | |
2912 | /* If the output marker is outside of the visible region, save | |
2913 | the restriction and widen. */ | |
6ec8bbd2 | 2914 | if (! (BEGV <= PT && PT <= ZV)) |
b0310da4 JB |
2915 | Fwiden (); |
2916 | ||
d0d6b7c5 JB |
2917 | /* Insert before markers in case we are inserting where |
2918 | the buffer's mark is, and the user's next command is Meta-y. */ | |
0fa1789e KH |
2919 | if (chars_in_decoding_buf) |
2920 | insert_from_string_before_markers (p->decoding_buf, 0, nchars, 0); | |
2921 | else | |
2922 | insert_before_markers (chars, nchars); | |
6ec8bbd2 | 2923 | Fset_marker (p->mark, make_number (PT), p->buffer); |
b0310da4 | 2924 | |
d0d6b7c5 JB |
2925 | update_mode_lines++; |
2926 | ||
12ca5cdf RS |
2927 | /* Make sure opoint and the old restrictions |
2928 | float ahead of any new text just as point would. */ | |
2929 | if (opoint >= before) | |
2930 | opoint += PT - before; | |
2931 | if (old_begv > before) | |
2932 | old_begv += PT - before; | |
2933 | if (old_zv >= before) | |
2934 | old_zv += PT - before; | |
2935 | ||
b0310da4 | 2936 | /* If the restriction isn't what it should be, set it. */ |
12ca5cdf RS |
2937 | if (old_begv != BEGV || old_zv != ZV) |
2938 | Fnarrow_to_region (make_number (old_begv), make_number (old_zv)); | |
b0310da4 | 2939 | |
592ce97f | 2940 | /* Handling the process output should not deactivate the mark. */ |
30c78175 RS |
2941 | Vdeactivate_mark = odeactivate; |
2942 | ||
b0310da4 | 2943 | current_buffer->read_only = old_read_only; |
d0d6b7c5 JB |
2944 | SET_PT (opoint); |
2945 | set_buffer_internal (old); | |
2946 | } | |
2947 | #ifdef VMS | |
2948 | start_vms_process_read (vs); | |
2949 | #endif | |
2950 | return nchars; | |
2951 | } | |
2952 | ||
2953 | DEFUN ("waiting-for-user-input-p", Fwaiting_for_user_input_p, Swaiting_for_user_input_p, | |
2954 | 0, 0, 0, | |
8b4d685f | 2955 | "Returns non-nil if emacs is waiting for input from the user.\n\ |
d0d6b7c5 JB |
2956 | This is intended for use by asynchronous process output filters and sentinels.") |
2957 | () | |
2958 | { | |
8b4d685f | 2959 | return (waiting_for_user_input_p ? Qt : Qnil); |
d0d6b7c5 JB |
2960 | } |
2961 | \f | |
2962 | /* Sending data to subprocess */ | |
2963 | ||
2964 | jmp_buf send_process_frame; | |
2965 | ||
2966 | SIGTYPE | |
2967 | send_process_trap () | |
2968 | { | |
2969 | #ifdef BSD4_1 | |
2970 | sigrelse (SIGPIPE); | |
2971 | sigrelse (SIGALRM); | |
2972 | #endif /* BSD4_1 */ | |
2973 | longjmp (send_process_frame, 1); | |
2974 | } | |
2975 | ||
4556b700 RS |
2976 | /* Send some data to process PROC. |
2977 | BUF is the beginning of the data; LEN is the number of characters. | |
0fa1789e KH |
2978 | OBJECT is the Lisp object that the data comes from. |
2979 | ||
2980 | The data is encoded by PROC's coding-system for encoding before it | |
2981 | is sent. But if the data ends at the middle of multi-byte | |
2982 | representation, that incomplete sequence of bytes are sent without | |
2983 | being encoded. Should we store them in a buffer to prepend them to | |
2984 | the data send later? */ | |
4556b700 RS |
2985 | |
2986 | send_process (proc, buf, len, object) | |
ecd1f654 | 2987 | volatile Lisp_Object proc; |
b684d043 | 2988 | unsigned char *buf; |
d0d6b7c5 | 2989 | int len; |
4556b700 | 2990 | Lisp_Object object; |
d0d6b7c5 | 2991 | { |
ecd1f654 | 2992 | /* Use volatile to protect variables from being clobbered by longjmp. */ |
d0d6b7c5 | 2993 | int rv; |
ecd1f654 | 2994 | volatile unsigned char *procname = XSTRING (XPROCESS (proc)->name)->data; |
0fa1789e | 2995 | struct coding_system *coding; |
6044e593 RS |
2996 | struct gcpro gcpro1; |
2997 | ||
2998 | GCPRO1 (object); | |
d0d6b7c5 | 2999 | |
d0d6b7c5 JB |
3000 | #ifdef VMS |
3001 | struct Lisp_Process *p = XPROCESS (proc); | |
3002 | VMS_PROC_STUFF *vs, *get_vms_process_pointer(); | |
3003 | #endif /* VMS */ | |
3004 | ||
3005 | if (! NILP (XPROCESS (proc)->raw_status_low)) | |
3006 | update_status (XPROCESS (proc)); | |
3007 | if (! EQ (XPROCESS (proc)->status, Qrun)) | |
3008 | error ("Process %s not running", procname); | |
0fa1789e KH |
3009 | if (XINT (XPROCESS (proc)->outfd) < 0) |
3010 | error ("Output file descriptor of %s is closed", procname); | |
3011 | ||
c7580538 | 3012 | coding = proc_encode_coding_system[XINT (XPROCESS (proc)->outfd)]; |
71a4b3e8 | 3013 | if (! CODING_MAY_REQUIRE_NO_CONVERSION (coding)) |
0fa1789e KH |
3014 | { |
3015 | int require = encoding_buffer_size (coding, len); | |
3016 | int offset, dummy; | |
b684d043 | 3017 | unsigned char *temp_buf = NULL; |
0fa1789e KH |
3018 | |
3019 | /* Remember the offset of data because a string or a buffer may | |
3020 | be relocated. Setting OFFSET to -1 means we don't have to | |
3021 | care relocation. */ | |
3022 | offset = (BUFFERP (object) | |
b684d043 | 3023 | ? BUF_PTR_CHAR_POS (XBUFFER (object), buf) |
0fa1789e | 3024 | : (STRINGP (object) |
b684d043 | 3025 | ? offset = buf - XSTRING (object)->data |
0fa1789e KH |
3026 | : -1)); |
3027 | ||
3028 | if (coding->carryover_size > 0) | |
3029 | { | |
b684d043 | 3030 | temp_buf = (unsigned char *) xmalloc (len + coding->carryover_size); |
0fa1789e KH |
3031 | |
3032 | if (offset >= 0) | |
3033 | { | |
3034 | if (BUFFERP (object)) | |
b684d043 | 3035 | buf = BUF_CHAR_ADDRESS (XBUFFER (object), offset); |
0fa1789e | 3036 | else if (STRINGP (object)) |
b684d043 | 3037 | buf = offset + XSTRING (object)->data; |
0fa1789e KH |
3038 | /* Now we don't have to care relocation. */ |
3039 | offset = -1; | |
3040 | } | |
3041 | bcopy (coding->carryover, temp_buf, coding->carryover_size); | |
3042 | bcopy (buf, temp_buf + coding->carryover_size, len); | |
3043 | buf = temp_buf; | |
3044 | } | |
3045 | ||
3046 | if (XSTRING (XPROCESS (proc)->encoding_buf)->size < require) | |
3047 | { | |
3048 | XPROCESS (proc)->encoding_buf = make_uninit_string (require); | |
3049 | ||
3050 | if (offset >= 0) | |
3051 | { | |
3052 | if (BUFFERP (object)) | |
b684d043 | 3053 | buf = BUF_CHAR_ADDRESS (XBUFFER (object), offset); |
0fa1789e | 3054 | else if (STRINGP (object)) |
b684d043 | 3055 | buf = offset + XSTRING (object)->data; |
0fa1789e KH |
3056 | } |
3057 | } | |
3058 | object = XPROCESS (proc)->encoding_buf; | |
3059 | len = encode_coding (coding, buf, XSTRING (object)->data, | |
3060 | len, XSTRING (object)->size, &dummy); | |
3061 | buf = XSTRING (object)->data; | |
3062 | if (temp_buf) | |
3063 | xfree (temp_buf); | |
3064 | } | |
d0d6b7c5 JB |
3065 | |
3066 | #ifdef VMS | |
3067 | vs = get_vms_process_pointer (p->pid); | |
3068 | if (vs == 0) | |
3069 | error ("Could not find this process: %x", p->pid); | |
3070 | else if (write_to_vms_process (vs, buf, len)) | |
3071 | ; | |
3072 | #else | |
4556b700 RS |
3073 | |
3074 | if (pty_max_bytes == 0) | |
3075 | { | |
3076 | #if defined (HAVE_FPATHCONF) && defined (_PC_MAX_CANON) | |
3077 | pty_max_bytes = fpathconf (XFASTINT (XPROCESS (proc)->outfd), | |
3078 | _PC_MAX_CANON); | |
3079 | if (pty_max_bytes < 0) | |
3080 | pty_max_bytes = 250; | |
3081 | #else | |
3082 | pty_max_bytes = 250; | |
3083 | #endif | |
3084 | /* Deduct one, to leave space for the eof. */ | |
3085 | pty_max_bytes--; | |
3086 | } | |
3087 | ||
d0d6b7c5 JB |
3088 | if (!setjmp (send_process_frame)) |
3089 | while (len > 0) | |
3090 | { | |
3091 | int this = len; | |
4746118a | 3092 | SIGTYPE (*old_sigpipe)(); |
93b4f699 RS |
3093 | int flush_pty = 0; |
3094 | ||
4556b700 RS |
3095 | /* Decide how much data we can send in one batch. |
3096 | Long lines need to be split into multiple batches. */ | |
3097 | if (!NILP (XPROCESS (proc)->pty_flag)) | |
93b4f699 | 3098 | { |
4556b700 RS |
3099 | /* Starting this at zero is always correct when not the first iteration |
3100 | because the previous iteration ended by sending C-d. | |
3101 | It may not be correct for the first iteration | |
3102 | if a partial line was sent in a separate send_process call. | |
3103 | If that proves worth handling, we need to save linepos | |
3104 | in the process object. */ | |
3105 | int linepos = 0; | |
b684d043 RS |
3106 | unsigned char *ptr = buf; |
3107 | unsigned char *end = buf + len; | |
4556b700 RS |
3108 | |
3109 | /* Scan through this text for a line that is too long. */ | |
3110 | while (ptr != end && linepos < pty_max_bytes) | |
3111 | { | |
3112 | if (*ptr == '\n') | |
3113 | linepos = 0; | |
3114 | else | |
3115 | linepos++; | |
3116 | ptr++; | |
3117 | } | |
3118 | /* If we found one, break the line there | |
3119 | and put in a C-d to force the buffer through. */ | |
3120 | this = ptr - buf; | |
93b4f699 RS |
3121 | } |
3122 | ||
4556b700 RS |
3123 | /* Send this batch, using one or more write calls. */ |
3124 | while (this > 0) | |
d0d6b7c5 | 3125 | { |
4556b700 RS |
3126 | old_sigpipe = (SIGTYPE (*) ()) signal (SIGPIPE, send_process_trap); |
3127 | rv = write (XINT (XPROCESS (proc)->outfd), buf, this); | |
3128 | signal (SIGPIPE, old_sigpipe); | |
3129 | ||
3130 | if (rv < 0) | |
3131 | { | |
3132 | if (0 | |
d0d6b7c5 | 3133 | #ifdef EWOULDBLOCK |
4556b700 | 3134 | || errno == EWOULDBLOCK |
d0d6b7c5 JB |
3135 | #endif |
3136 | #ifdef EAGAIN | |
4556b700 | 3137 | || errno == EAGAIN |
d0d6b7c5 | 3138 | #endif |
4556b700 RS |
3139 | ) |
3140 | /* Buffer is full. Wait, accepting input; | |
3141 | that may allow the program | |
3142 | to finish doing output and read more. */ | |
3143 | { | |
3144 | Lisp_Object zero; | |
3145 | int offset; | |
3146 | ||
3147 | /* Running filters might relocate buffers or strings. | |
3148 | Arrange to relocate BUF. */ | |
3149 | if (BUFFERP (object)) | |
b684d043 | 3150 | offset = BUF_PTR_CHAR_POS (XBUFFER (object), buf); |
4556b700 | 3151 | else if (STRINGP (object)) |
b684d043 | 3152 | offset = buf - XSTRING (object)->data; |
4556b700 | 3153 | |
22719df2 | 3154 | XSETFASTINT (zero, 0); |
f3e6605c RS |
3155 | #ifdef EMACS_HAS_USECS |
3156 | wait_reading_process_input (0, 20000, zero, 0); | |
3157 | #else | |
4556b700 | 3158 | wait_reading_process_input (1, 0, zero, 0); |
f3e6605c | 3159 | #endif |
4556b700 RS |
3160 | |
3161 | if (BUFFERP (object)) | |
b684d043 | 3162 | buf = BUF_CHAR_ADDRESS (XBUFFER (object), offset); |
4556b700 | 3163 | else if (STRINGP (object)) |
b684d043 | 3164 | buf = offset + XSTRING (object)->data; |
4556b700 RS |
3165 | |
3166 | rv = 0; | |
3167 | } | |
3168 | else | |
3169 | /* This is a real error. */ | |
3170 | report_file_error ("writing to process", Fcons (proc, Qnil)); | |
d0d6b7c5 | 3171 | } |
4556b700 RS |
3172 | buf += rv; |
3173 | len -= rv; | |
3174 | this -= rv; | |
d0d6b7c5 | 3175 | } |
f76475ad | 3176 | |
4556b700 RS |
3177 | /* If we sent just part of the string, put in an EOF |
3178 | to force it through, before we send the rest. */ | |
3179 | if (len > 0) | |
3180 | Fprocess_send_eof (proc); | |
d0d6b7c5 JB |
3181 | } |
3182 | #endif | |
3183 | else | |
3184 | { | |
3185 | XPROCESS (proc)->raw_status_low = Qnil; | |
3186 | XPROCESS (proc)->raw_status_high = Qnil; | |
3187 | XPROCESS (proc)->status = Fcons (Qexit, Fcons (make_number (256), Qnil)); | |
3188 | XSETINT (XPROCESS (proc)->tick, ++process_tick); | |
3189 | deactivate_process (proc); | |
3190 | #ifdef VMS | |
3191 | error ("Error writing to process %s; closed it", procname); | |
3192 | #else | |
3193 | error ("SIGPIPE raised on process %s; closed it", procname); | |
3194 | #endif | |
3195 | } | |
6044e593 RS |
3196 | |
3197 | UNGCPRO; | |
d0d6b7c5 JB |
3198 | } |
3199 | ||
3200 | DEFUN ("process-send-region", Fprocess_send_region, Sprocess_send_region, | |
3201 | 3, 3, 0, | |
3202 | "Send current contents of region as input to PROCESS.\n\ | |
ebb9e16f JB |
3203 | PROCESS may be a process, a buffer, the name of a process or buffer, or\n\ |
3204 | nil, indicating the current buffer's process.\n\ | |
d0d6b7c5 JB |
3205 | Called from program, takes three arguments, PROCESS, START and END.\n\ |
3206 | If the region is more than 500 characters long,\n\ | |
3207 | it is sent in several bunches. This may happen even for shorter regions.\n\ | |
3208 | Output from processes can arrive in between bunches.") | |
3209 | (process, start, end) | |
3210 | Lisp_Object process, start, end; | |
3211 | { | |
3212 | Lisp_Object proc; | |
3213 | int start1; | |
3214 | ||
3215 | proc = get_process (process); | |
3216 | validate_region (&start, &end); | |
3217 | ||
3218 | if (XINT (start) < GPT && XINT (end) > GPT) | |
4da6dec8 | 3219 | move_gap (XINT (start)); |
d0d6b7c5 JB |
3220 | |
3221 | start1 = XINT (start); | |
0fa1789e | 3222 | send_process (proc, POS_ADDR (start1), XINT (end) - XINT (start), |
4556b700 | 3223 | Fcurrent_buffer ()); |
d0d6b7c5 JB |
3224 | |
3225 | return Qnil; | |
3226 | } | |
3227 | ||
3228 | DEFUN ("process-send-string", Fprocess_send_string, Sprocess_send_string, | |
3229 | 2, 2, 0, | |
3230 | "Send PROCESS the contents of STRING as input.\n\ | |
ebb9e16f JB |
3231 | PROCESS may be a process, a buffer, the name of a process or buffer, or\n\ |
3232 | nil, indicating the current buffer's process.\n\ | |
d0d6b7c5 JB |
3233 | If STRING is more than 500 characters long,\n\ |
3234 | it is sent in several bunches. This may happen even for shorter strings.\n\ | |
3235 | Output from processes can arrive in between bunches.") | |
3236 | (process, string) | |
3237 | Lisp_Object process, string; | |
3238 | { | |
3239 | Lisp_Object proc; | |
3240 | CHECK_STRING (string, 1); | |
3241 | proc = get_process (process); | |
4556b700 | 3242 | send_process (proc, XSTRING (string)->data, XSTRING (string)->size, string); |
d0d6b7c5 JB |
3243 | return Qnil; |
3244 | } | |
3245 | \f | |
3246 | /* send a signal number SIGNO to PROCESS. | |
3247 | CURRENT_GROUP means send to the process group that currently owns | |
3248 | the terminal being used to communicate with PROCESS. | |
3249 | This is used for various commands in shell mode. | |
3250 | If NOMSG is zero, insert signal-announcements into process's buffers | |
b0310da4 JB |
3251 | right away. |
3252 | ||
3253 | If we can, we try to signal PROCESS by sending control characters | |
e333e864 | 3254 | down the pty. This allows us to signal inferiors who have changed |
b0310da4 | 3255 | their uid, for which killpg would return an EPERM error. */ |
d0d6b7c5 | 3256 | |
f9738840 | 3257 | static void |
d0d6b7c5 JB |
3258 | process_send_signal (process, signo, current_group, nomsg) |
3259 | Lisp_Object process; | |
3260 | int signo; | |
3261 | Lisp_Object current_group; | |
3262 | int nomsg; | |
3263 | { | |
3264 | Lisp_Object proc; | |
3265 | register struct Lisp_Process *p; | |
3266 | int gid; | |
3267 | int no_pgrp = 0; | |
3268 | ||
3269 | proc = get_process (process); | |
3270 | p = XPROCESS (proc); | |
3271 | ||
3272 | if (!EQ (p->childp, Qt)) | |
3273 | error ("Process %s is not a subprocess", | |
3274 | XSTRING (p->name)->data); | |
a9f2c884 | 3275 | if (XINT (p->infd) < 0) |
d0d6b7c5 JB |
3276 | error ("Process %s is not active", |
3277 | XSTRING (p->name)->data); | |
3278 | ||
3279 | if (NILP (p->pty_flag)) | |
3280 | current_group = Qnil; | |
3281 | ||
d0d6b7c5 JB |
3282 | /* If we are using pgrps, get a pgrp number and make it negative. */ |
3283 | if (!NILP (current_group)) | |
3284 | { | |
b0310da4 | 3285 | #ifdef SIGNALS_VIA_CHARACTERS |
d0d6b7c5 JB |
3286 | /* If possible, send signals to the entire pgrp |
3287 | by sending an input character to it. */ | |
b0310da4 | 3288 | |
6be429b1 JB |
3289 | /* TERMIOS is the latest and bestest, and seems most likely to |
3290 | work. If the system has it, use it. */ | |
3291 | #ifdef HAVE_TERMIOS | |
3292 | struct termios t; | |
3293 | ||
3294 | switch (signo) | |
3295 | { | |
3296 | case SIGINT: | |
a9f2c884 | 3297 | tcgetattr (XINT (p->infd), &t); |
4556b700 | 3298 | send_process (proc, &t.c_cc[VINTR], 1, Qnil); |
a87b802f | 3299 | return; |
6be429b1 JB |
3300 | |
3301 | case SIGQUIT: | |
a9f2c884 | 3302 | tcgetattr (XINT (p->infd), &t); |
4556b700 | 3303 | send_process (proc, &t.c_cc[VQUIT], 1, Qnil); |
a87b802f | 3304 | return; |
6be429b1 JB |
3305 | |
3306 | case SIGTSTP: | |
a9f2c884 | 3307 | tcgetattr (XINT (p->infd), &t); |
d0adf46f | 3308 | #if defined (VSWTCH) && !defined (PREFER_VSUSP) |
4556b700 | 3309 | send_process (proc, &t.c_cc[VSWTCH], 1, Qnil); |
6be429b1 | 3310 | #else |
4556b700 | 3311 | send_process (proc, &t.c_cc[VSUSP], 1, Qnil); |
6be429b1 | 3312 | #endif |
a87b802f | 3313 | return; |
6be429b1 JB |
3314 | } |
3315 | ||
3316 | #else /* ! HAVE_TERMIOS */ | |
3317 | ||
b0310da4 JB |
3318 | /* On Berkeley descendants, the following IOCTL's retrieve the |
3319 | current control characters. */ | |
d0d6b7c5 | 3320 | #if defined (TIOCGLTC) && defined (TIOCGETC) |
b0310da4 | 3321 | |
d0d6b7c5 JB |
3322 | struct tchars c; |
3323 | struct ltchars lc; | |
3324 | ||
3325 | switch (signo) | |
3326 | { | |
3327 | case SIGINT: | |
a9f2c884 | 3328 | ioctl (XINT (p->infd), TIOCGETC, &c); |
4556b700 | 3329 | send_process (proc, &c.t_intrc, 1, Qnil); |
f9738840 | 3330 | return; |
d0d6b7c5 | 3331 | case SIGQUIT: |
a9f2c884 | 3332 | ioctl (XINT (p->infd), TIOCGETC, &c); |
4556b700 | 3333 | send_process (proc, &c.t_quitc, 1, Qnil); |
f9738840 | 3334 | return; |
0ad77c54 | 3335 | #ifdef SIGTSTP |
d0d6b7c5 | 3336 | case SIGTSTP: |
a9f2c884 | 3337 | ioctl (XINT (p->infd), TIOCGLTC, &lc); |
4556b700 | 3338 | send_process (proc, &lc.t_suspc, 1, Qnil); |
f9738840 | 3339 | return; |
b0310da4 | 3340 | #endif /* ! defined (SIGTSTP) */ |
d0d6b7c5 | 3341 | } |
b0310da4 JB |
3342 | |
3343 | #else /* ! defined (TIOCGLTC) && defined (TIOCGETC) */ | |
3344 | ||
3345 | /* On SYSV descendants, the TCGETA ioctl retrieves the current control | |
3346 | characters. */ | |
3347 | #ifdef TCGETA | |
d0d6b7c5 JB |
3348 | struct termio t; |
3349 | switch (signo) | |
3350 | { | |
3351 | case SIGINT: | |
a9f2c884 | 3352 | ioctl (XINT (p->infd), TCGETA, &t); |
4556b700 | 3353 | send_process (proc, &t.c_cc[VINTR], 1, Qnil); |
f9738840 | 3354 | return; |
d0d6b7c5 | 3355 | case SIGQUIT: |
a9f2c884 | 3356 | ioctl (XINT (p->infd), TCGETA, &t); |
4556b700 | 3357 | send_process (proc, &t.c_cc[VQUIT], 1, Qnil); |
f9738840 | 3358 | return; |
7d79e3b4 | 3359 | #ifdef SIGTSTP |
d0d6b7c5 | 3360 | case SIGTSTP: |
a9f2c884 | 3361 | ioctl (XINT (p->infd), TCGETA, &t); |
4556b700 | 3362 | send_process (proc, &t.c_cc[VSWTCH], 1, Qnil); |
f9738840 | 3363 | return; |
b0310da4 | 3364 | #endif /* ! defined (SIGTSTP) */ |
d0d6b7c5 | 3365 | } |
b0310da4 JB |
3366 | #else /* ! defined (TCGETA) */ |
3367 | Your configuration files are messed up. | |
3368 | /* If your system configuration files define SIGNALS_VIA_CHARACTERS, | |
3369 | you'd better be using one of the alternatives above! */ | |
3370 | #endif /* ! defined (TCGETA) */ | |
3371 | #endif /* ! defined (TIOCGLTC) && defined (TIOCGETC) */ | |
6be429b1 | 3372 | #endif /* ! defined HAVE_TERMIOS */ |
b0310da4 | 3373 | #endif /* ! defined (SIGNALS_VIA_CHARACTERS) */ |
d0d6b7c5 | 3374 | |
301c3fe4 | 3375 | #ifdef TIOCGPGRP |
d0d6b7c5 JB |
3376 | /* Get the pgrp using the tty itself, if we have that. |
3377 | Otherwise, use the pty to get the pgrp. | |
3378 | On pfa systems, saka@pfu.fujitsu.co.JP writes: | |
b0310da4 JB |
3379 | "TIOCGPGRP symbol defined in sys/ioctl.h at E50. |
3380 | But, TIOCGPGRP does not work on E50 ;-P works fine on E60" | |
d0d6b7c5 JB |
3381 | His patch indicates that if TIOCGPGRP returns an error, then |
3382 | we should just assume that p->pid is also the process group id. */ | |
3383 | { | |
3384 | int err; | |
3385 | ||
3386 | if (!NILP (p->subtty)) | |
3387 | err = ioctl (XFASTINT (p->subtty), TIOCGPGRP, &gid); | |
3388 | else | |
a9f2c884 | 3389 | err = ioctl (XINT (p->infd), TIOCGPGRP, &gid); |
d0d6b7c5 JB |
3390 | |
3391 | #ifdef pfa | |
3392 | if (err == -1) | |
3393 | gid = - XFASTINT (p->pid); | |
301c3fe4 | 3394 | #endif /* ! defined (pfa) */ |
d0d6b7c5 JB |
3395 | } |
3396 | if (gid == -1) | |
3397 | no_pgrp = 1; | |
3398 | else | |
3399 | gid = - gid; | |
b0310da4 | 3400 | #else /* ! defined (TIOCGPGRP ) */ |
301c3fe4 JB |
3401 | /* Can't select pgrps on this system, so we know that |
3402 | the child itself heads the pgrp. */ | |
3403 | gid = - XFASTINT (p->pid); | |
3404 | #endif /* ! defined (TIOCGPGRP ) */ | |
d0d6b7c5 JB |
3405 | } |
3406 | else | |
3407 | gid = - XFASTINT (p->pid); | |
d0d6b7c5 JB |
3408 | |
3409 | switch (signo) | |
3410 | { | |
3411 | #ifdef SIGCONT | |
3412 | case SIGCONT: | |
3413 | p->raw_status_low = Qnil; | |
3414 | p->raw_status_high = Qnil; | |
3415 | p->status = Qrun; | |
3416 | XSETINT (p->tick, ++process_tick); | |
3417 | if (!nomsg) | |
3418 | status_notify (); | |
3419 | break; | |
301c3fe4 | 3420 | #endif /* ! defined (SIGCONT) */ |
d0d6b7c5 JB |
3421 | case SIGINT: |
3422 | #ifdef VMS | |
4556b700 | 3423 | send_process (proc, "\003", 1, Qnil); /* ^C */ |
d0d6b7c5 JB |
3424 | goto whoosh; |
3425 | #endif | |
3426 | case SIGQUIT: | |
3427 | #ifdef VMS | |
4556b700 | 3428 | send_process (proc, "\031", 1, Qnil); /* ^Y */ |
d0d6b7c5 JB |
3429 | goto whoosh; |
3430 | #endif | |
3431 | case SIGKILL: | |
3432 | #ifdef VMS | |
3433 | sys$forcex (&(XFASTINT (p->pid)), 0, 1); | |
3434 | whoosh: | |
3435 | #endif | |
a9f2c884 | 3436 | flush_pending_output (XINT (p->infd)); |
d0d6b7c5 JB |
3437 | break; |
3438 | } | |
3439 | ||
3440 | /* If we don't have process groups, send the signal to the immediate | |
3441 | subprocess. That isn't really right, but it's better than any | |
3442 | obvious alternative. */ | |
3443 | if (no_pgrp) | |
3444 | { | |
3445 | kill (XFASTINT (p->pid), signo); | |
3446 | return; | |
3447 | } | |
3448 | ||
3449 | /* gid may be a pid, or minus a pgrp's number */ | |
3450 | #ifdef TIOCSIGSEND | |
3451 | if (!NILP (current_group)) | |
a9f2c884 | 3452 | ioctl (XINT (p->infd), TIOCSIGSEND, signo); |
d0d6b7c5 JB |
3453 | else |
3454 | { | |
3455 | gid = - XFASTINT (p->pid); | |
3456 | kill (gid, signo); | |
3457 | } | |
301c3fe4 | 3458 | #else /* ! defined (TIOCSIGSEND) */ |
d0d6b7c5 | 3459 | EMACS_KILLPG (-gid, signo); |
301c3fe4 | 3460 | #endif /* ! defined (TIOCSIGSEND) */ |
d0d6b7c5 JB |
3461 | } |
3462 | ||
3463 | DEFUN ("interrupt-process", Finterrupt_process, Sinterrupt_process, 0, 2, 0, | |
3464 | "Interrupt process PROCESS. May be process or name of one.\n\ | |
ebb9e16f | 3465 | PROCESS may be a process, a buffer, or the name of a process or buffer.\n\ |
e333e864 | 3466 | nil or no arg means current buffer's process.\n\ |
d0d6b7c5 JB |
3467 | Second arg CURRENT-GROUP non-nil means send signal to\n\ |
3468 | the current process-group of the process's controlling terminal\n\ | |
3469 | rather than to the process's own process group.\n\ | |
3470 | If the process is a shell, this means interrupt current subjob\n\ | |
3471 | rather than the shell.") | |
3472 | (process, current_group) | |
3473 | Lisp_Object process, current_group; | |
3474 | { | |
3475 | process_send_signal (process, SIGINT, current_group, 0); | |
3476 | return process; | |
3477 | } | |
3478 | ||
3479 | DEFUN ("kill-process", Fkill_process, Skill_process, 0, 2, 0, | |
3480 | "Kill process PROCESS. May be process or name of one.\n\ | |
3481 | See function `interrupt-process' for more details on usage.") | |
3482 | (process, current_group) | |
3483 | Lisp_Object process, current_group; | |
3484 | { | |
3485 | process_send_signal (process, SIGKILL, current_group, 0); | |
3486 | return process; | |
3487 | } | |
3488 | ||
3489 | DEFUN ("quit-process", Fquit_process, Squit_process, 0, 2, 0, | |
3490 | "Send QUIT signal to process PROCESS. May be process or name of one.\n\ | |
3491 | See function `interrupt-process' for more details on usage.") | |
3492 | (process, current_group) | |
3493 | Lisp_Object process, current_group; | |
3494 | { | |
3495 | process_send_signal (process, SIGQUIT, current_group, 0); | |
3496 | return process; | |
3497 | } | |
3498 | ||
3499 | DEFUN ("stop-process", Fstop_process, Sstop_process, 0, 2, 0, | |
3500 | "Stop process PROCESS. May be process or name of one.\n\ | |
3501 | See function `interrupt-process' for more details on usage.") | |
3502 | (process, current_group) | |
3503 | Lisp_Object process, current_group; | |
3504 | { | |
3505 | #ifndef SIGTSTP | |
3506 | error ("no SIGTSTP support"); | |
3507 | #else | |
3508 | process_send_signal (process, SIGTSTP, current_group, 0); | |
3509 | #endif | |
3510 | return process; | |
3511 | } | |
3512 | ||
3513 | DEFUN ("continue-process", Fcontinue_process, Scontinue_process, 0, 2, 0, | |
3514 | "Continue process PROCESS. May be process or name of one.\n\ | |
3515 | See function `interrupt-process' for more details on usage.") | |
3516 | (process, current_group) | |
3517 | Lisp_Object process, current_group; | |
3518 | { | |
3519 | #ifdef SIGCONT | |
3520 | process_send_signal (process, SIGCONT, current_group, 0); | |
3521 | #else | |
3522 | error ("no SIGCONT support"); | |
3523 | #endif | |
3524 | return process; | |
3525 | } | |
3526 | ||
3527 | DEFUN ("signal-process", Fsignal_process, Ssignal_process, | |
3528 | 2, 2, "nProcess number: \nnSignal code: ", | |
4766242d RS |
3529 | "Send the process with process id PID the signal with code SIGCODE.\n\ |
3530 | PID must be an integer. The process need not be a child of this Emacs.\n\ | |
3531 | SIGCODE may be an integer, or a symbol whose name is a signal name.") | |
3532 | (pid, sigcode) | |
3533 | Lisp_Object pid, sigcode; | |
d0d6b7c5 JB |
3534 | { |
3535 | CHECK_NUMBER (pid, 0); | |
4766242d RS |
3536 | |
3537 | #define handle_signal(NAME, VALUE) \ | |
3538 | else if (!strcmp (name, NAME)) \ | |
3539 | XSETINT (sigcode, VALUE) | |
3540 | ||
3541 | if (INTEGERP (sigcode)) | |
3542 | ; | |
3543 | else | |
3544 | { | |
3545 | unsigned char *name; | |
3546 | ||
3547 | CHECK_SYMBOL (sigcode, 1); | |
3548 | name = XSYMBOL (sigcode)->name->data; | |
3549 | ||
3550 | if (0) | |
3551 | ; | |
3552 | #ifdef SIGHUP | |
3553 | handle_signal ("SIGHUP", SIGHUP); | |
3554 | #endif | |
3555 | #ifdef SIGINT | |
3556 | handle_signal ("SIGINT", SIGINT); | |
3557 | #endif | |
3558 | #ifdef SIGQUIT | |
3559 | handle_signal ("SIGQUIT", SIGQUIT); | |
3560 | #endif | |
3561 | #ifdef SIGILL | |
3562 | handle_signal ("SIGILL", SIGILL); | |
3563 | #endif | |
3564 | #ifdef SIGABRT | |
3565 | handle_signal ("SIGABRT", SIGABRT); | |
3566 | #endif | |
3567 | #ifdef SIGEMT | |
3568 | handle_signal ("SIGEMT", SIGEMT); | |
3569 | #endif | |
3570 | #ifdef SIGKILL | |
3571 | handle_signal ("SIGKILL", SIGKILL); | |
3572 | #endif | |
3573 | #ifdef SIGFPE | |
3574 | handle_signal ("SIGFPE", SIGFPE); | |
3575 | #endif | |
3576 | #ifdef SIGBUS | |
3577 | handle_signal ("SIGBUS", SIGBUS); | |
3578 | #endif | |
3579 | #ifdef SIGSEGV | |
3580 | handle_signal ("SIGSEGV", SIGSEGV); | |
3581 | #endif | |
3582 | #ifdef SIGSYS | |
3583 | handle_signal ("SIGSYS", SIGSYS); | |
3584 | #endif | |
3585 | #ifdef SIGPIPE | |
3586 | handle_signal ("SIGPIPE", SIGPIPE); | |
3587 | #endif | |
3588 | #ifdef SIGALRM | |
3589 | handle_signal ("SIGALRM", SIGALRM); | |
3590 | #endif | |
3591 | #ifdef SIGTERM | |
3592 | handle_signal ("SIGTERM", SIGTERM); | |
3593 | #endif | |
3594 | #ifdef SIGURG | |
3595 | handle_signal ("SIGURG", SIGURG); | |
3596 | #endif | |
3597 | #ifdef SIGSTOP | |
3598 | handle_signal ("SIGSTOP", SIGSTOP); | |
3599 | #endif | |
3600 | #ifdef SIGTSTP | |
3601 | handle_signal ("SIGTSTP", SIGTSTP); | |
3602 | #endif | |
3603 | #ifdef SIGCONT | |
3604 | handle_signal ("SIGCONT", SIGCONT); | |
3605 | #endif | |
3606 | #ifdef SIGCHLD | |
3607 | handle_signal ("SIGCHLD", SIGCHLD); | |
3608 | #endif | |
3609 | #ifdef SIGTTIN | |
3610 | handle_signal ("SIGTTIN", SIGTTIN); | |
3611 | #endif | |
3612 | #ifdef SIGTTOU | |
3613 | handle_signal ("SIGTTOU", SIGTTOU); | |
3614 | #endif | |
3615 | #ifdef SIGIO | |
3616 | handle_signal ("SIGIO", SIGIO); | |
3617 | #endif | |
3618 | #ifdef SIGXCPU | |
3619 | handle_signal ("SIGXCPU", SIGXCPU); | |
3620 | #endif | |
3621 | #ifdef SIGXFSZ | |
3622 | handle_signal ("SIGXFSZ", SIGXFSZ); | |
3623 | #endif | |
3624 | #ifdef SIGVTALRM | |
3625 | handle_signal ("SIGVTALRM", SIGVTALRM); | |
3626 | #endif | |
3627 | #ifdef SIGPROF | |
3628 | handle_signal ("SIGPROF", SIGPROF); | |
3629 | #endif | |
3630 | #ifdef SIGWINCH | |
3631 | handle_signal ("SIGWINCH", SIGWINCH); | |
3632 | #endif | |
3633 | #ifdef SIGINFO | |
3634 | handle_signal ("SIGINFO", SIGINFO); | |
3635 | #endif | |
3636 | #ifdef SIGUSR1 | |
3637 | handle_signal ("SIGUSR1", SIGUSR1); | |
3638 | #endif | |
3639 | #ifdef SIGUSR2 | |
3640 | handle_signal ("SIGUSR2", SIGUSR2); | |
3641 | #endif | |
3642 | else | |
9fa195a2 | 3643 | error ("Undefined signal name %s", name); |
4766242d RS |
3644 | } |
3645 | ||
3646 | #undef handle_signal | |
3647 | ||
4766242d | 3648 | return make_number (kill (XINT (pid), XINT (sigcode))); |
d0d6b7c5 JB |
3649 | } |
3650 | ||
3651 | DEFUN ("process-send-eof", Fprocess_send_eof, Sprocess_send_eof, 0, 1, 0, | |
3652 | "Make PROCESS see end-of-file in its input.\n\ | |
3653 | Eof comes after any text already sent to it.\n\ | |
ebb9e16f | 3654 | PROCESS may be a process, a buffer, the name of a process or buffer, or\n\ |
d33a00f2 RS |
3655 | nil, indicating the current buffer's process.\n\ |
3656 | If PROCESS is a network connection, or is a process communicating\n\ | |
3657 | through a pipe (as opposed to a pty), then you cannot send any more\n\ | |
3658 | text to PROCESS after you call this function.") | |
d0d6b7c5 JB |
3659 | (process) |
3660 | Lisp_Object process; | |
3661 | { | |
3662 | Lisp_Object proc; | |
3663 | ||
3664 | proc = get_process (process); | |
577d03d5 RS |
3665 | |
3666 | /* Make sure the process is really alive. */ | |
3667 | if (! NILP (XPROCESS (proc)->raw_status_low)) | |
3668 | update_status (XPROCESS (proc)); | |
3669 | if (! EQ (XPROCESS (proc)->status, Qrun)) | |
dcf970e6 | 3670 | error ("Process %s not running", XSTRING (XPROCESS (proc)->name)->data); |
577d03d5 | 3671 | |
d0d6b7c5 | 3672 | #ifdef VMS |
4556b700 | 3673 | send_process (proc, "\032", 1, Qnil); /* ^z */ |
d0d6b7c5 JB |
3674 | #else |
3675 | if (!NILP (XPROCESS (proc)->pty_flag)) | |
4556b700 | 3676 | send_process (proc, "\004", 1, Qnil); |
d0d6b7c5 JB |
3677 | else |
3678 | { | |
93853f3d | 3679 | #ifdef HAVE_SHUTDOWN |
02f55c4b RS |
3680 | /* If this is a network connection, or socketpair is used |
3681 | for communication with the subprocess, call shutdown to cause EOF. | |
3682 | (In some old system, shutdown to socketpair doesn't work. | |
3683 | Then we just can't win.) */ | |
3684 | if (NILP (XPROCESS (proc)->pid) | |
3685 | || XINT (XPROCESS (proc)->outfd) == XINT (XPROCESS (proc)->infd)) | |
3686 | shutdown (XINT (XPROCESS (proc)->outfd), 1); | |
3687 | /* In case of socketpair, outfd == infd, so don't close it. */ | |
3688 | if (XINT (XPROCESS (proc)->outfd) != XINT (XPROCESS (proc)->infd)) | |
3689 | close (XINT (XPROCESS (proc)->outfd)); | |
93853f3d RS |
3690 | #else /* not HAVE_SHUTDOWN */ |
3691 | close (XINT (XPROCESS (proc)->outfd)); | |
3692 | #endif /* not HAVE_SHUTDOWN */ | |
1d056e64 | 3693 | XSETINT (XPROCESS (proc)->outfd, open (NULL_DEVICE, O_WRONLY)); |
d0d6b7c5 JB |
3694 | } |
3695 | #endif /* VMS */ | |
d0d6b7c5 JB |
3696 | return process; |
3697 | } | |
3698 | ||
3699 | /* Kill all processes associated with `buffer'. | |
3700 | If `buffer' is nil, kill all processes */ | |
3701 | ||
3702 | kill_buffer_processes (buffer) | |
3703 | Lisp_Object buffer; | |
3704 | { | |
3705 | Lisp_Object tail, proc; | |
3706 | ||
b5b502d6 | 3707 | for (tail = Vprocess_alist; GC_CONSP (tail); tail = XCONS (tail)->cdr) |
d0d6b7c5 JB |
3708 | { |
3709 | proc = XCONS (XCONS (tail)->car)->cdr; | |
b5b502d6 | 3710 | if (GC_PROCESSP (proc) |
d0d6b7c5 JB |
3711 | && (NILP (buffer) || EQ (XPROCESS (proc)->buffer, buffer))) |
3712 | { | |
3713 | if (NETCONN_P (proc)) | |
e1ab4959 | 3714 | Fdelete_process (proc); |
a9f2c884 | 3715 | else if (XINT (XPROCESS (proc)->infd) >= 0) |
d0d6b7c5 JB |
3716 | process_send_signal (proc, SIGHUP, Qnil, 1); |
3717 | } | |
3718 | } | |
3719 | } | |
3720 | \f | |
3721 | /* On receipt of a signal that a child status has changed, | |
3722 | loop asking about children with changed statuses until | |
3723 | the system says there are no more. | |
3724 | All we do is change the status; | |
3725 | we do not run sentinels or print notifications. | |
3726 | That is saved for the next time keyboard input is done, | |
3727 | in order to avoid timing errors. */ | |
3728 | ||
3729 | /** WARNING: this can be called during garbage collection. | |
3730 | Therefore, it must not be fooled by the presence of mark bits in | |
3731 | Lisp objects. */ | |
3732 | ||
3733 | /** USG WARNING: Although it is not obvious from the documentation | |
3734 | in signal(2), on a USG system the SIGCLD handler MUST NOT call | |
3735 | signal() before executing at least one wait(), otherwise the handler | |
3736 | will be called again, resulting in an infinite loop. The relevant | |
3737 | portion of the documentation reads "SIGCLD signals will be queued | |
3738 | and the signal-catching function will be continually reentered until | |
3739 | the queue is empty". Invoking signal() causes the kernel to reexamine | |
3740 | the SIGCLD queue. Fred Fish, UniSoft Systems Inc. */ | |
3741 | ||
3742 | SIGTYPE | |
3743 | sigchld_handler (signo) | |
3744 | int signo; | |
3745 | { | |
3746 | int old_errno = errno; | |
3747 | Lisp_Object proc; | |
3748 | register struct Lisp_Process *p; | |
6be429b1 | 3749 | extern EMACS_TIME *input_available_clear_time; |
d0d6b7c5 JB |
3750 | |
3751 | #ifdef BSD4_1 | |
3752 | extern int sigheld; | |
3753 | sigheld |= sigbit (SIGCHLD); | |
3754 | #endif | |
3755 | ||
3756 | while (1) | |
3757 | { | |
3758 | register int pid; | |
3759 | WAITTYPE w; | |
3760 | Lisp_Object tail; | |
3761 | ||
3762 | #ifdef WNOHANG | |
3763 | #ifndef WUNTRACED | |
3764 | #define WUNTRACED 0 | |
3765 | #endif /* no WUNTRACED */ | |
3766 | /* Keep trying to get a status until we get a definitive result. */ | |
3767 | do | |
3768 | { | |
3769 | errno = 0; | |
3770 | pid = wait3 (&w, WNOHANG | WUNTRACED, 0); | |
3771 | } | |
3772 | while (pid <= 0 && errno == EINTR); | |
3773 | ||
3774 | if (pid <= 0) | |
3775 | { | |
3776 | /* A real failure. We have done all our job, so return. */ | |
3777 | ||
3778 | /* USG systems forget handlers when they are used; | |
3779 | must reestablish each time */ | |
3c0ee47b | 3780 | #if defined (USG) && !defined (POSIX_SIGNALS) |
d0d6b7c5 JB |
3781 | signal (signo, sigchld_handler); /* WARNING - must come after wait3() */ |
3782 | #endif | |
3783 | #ifdef BSD4_1 | |
3784 | sigheld &= ~sigbit (SIGCHLD); | |
3785 | sigrelse (SIGCHLD); | |
3786 | #endif | |
3787 | errno = old_errno; | |
3788 | return; | |
3789 | } | |
3790 | #else | |
3791 | pid = wait (&w); | |
3792 | #endif /* no WNOHANG */ | |
3793 | ||
3794 | /* Find the process that signaled us, and record its status. */ | |
3795 | ||
3796 | p = 0; | |
7968cc2d | 3797 | for (tail = Vprocess_alist; CONSP (tail); tail = XCONS (tail)->cdr) |
d0d6b7c5 JB |
3798 | { |
3799 | proc = XCONS (XCONS (tail)->car)->cdr; | |
3800 | p = XPROCESS (proc); | |
3801 | if (EQ (p->childp, Qt) && XFASTINT (p->pid) == pid) | |
3802 | break; | |
3803 | p = 0; | |
3804 | } | |
3805 | ||
3806 | /* Look for an asynchronous process whose pid hasn't been filled | |
3807 | in yet. */ | |
3808 | if (p == 0) | |
7968cc2d | 3809 | for (tail = Vprocess_alist; CONSP (tail); tail = XCONS (tail)->cdr) |
d0d6b7c5 JB |
3810 | { |
3811 | proc = XCONS (XCONS (tail)->car)->cdr; | |
3812 | p = XPROCESS (proc); | |
bcd69aea | 3813 | if (INTEGERP (p->pid) && XINT (p->pid) == -1) |
d0d6b7c5 JB |
3814 | break; |
3815 | p = 0; | |
3816 | } | |
3817 | ||
3818 | /* Change the status of the process that was found. */ | |
3819 | if (p != 0) | |
3820 | { | |
3821 | union { int i; WAITTYPE wt; } u; | |
e98d950b | 3822 | int clear_desc_flag = 0; |
d0d6b7c5 JB |
3823 | |
3824 | XSETINT (p->tick, ++process_tick); | |
3825 | u.wt = w; | |
5fc0154c RS |
3826 | XSETINT (p->raw_status_low, u.i & 0xffff); |
3827 | XSETINT (p->raw_status_high, u.i >> 16); | |
d0d6b7c5 JB |
3828 | |
3829 | /* If process has terminated, stop waiting for its output. */ | |
e98d950b RS |
3830 | if ((WIFSIGNALED (w) || WIFEXITED (w)) |
3831 | && XINT (p->infd) >= 0) | |
3832 | clear_desc_flag = 1; | |
3833 | ||
3834 | /* We use clear_desc_flag to avoid a compiler bug in Microsoft C. */ | |
3835 | if (clear_desc_flag) | |
3836 | { | |
3837 | FD_CLR (XINT (p->infd), &input_wait_mask); | |
3838 | FD_CLR (XINT (p->infd), &non_keyboard_wait_mask); | |
3839 | } | |
6be429b1 JB |
3840 | |
3841 | /* Tell wait_reading_process_input that it needs to wake up and | |
3842 | look around. */ | |
3843 | if (input_available_clear_time) | |
3844 | EMACS_SET_SECS_USECS (*input_available_clear_time, 0, 0); | |
d0d6b7c5 JB |
3845 | } |
3846 | ||
3847 | /* There was no asynchronous process found for that id. Check | |
3848 | if we have a synchronous process. */ | |
3849 | else | |
3850 | { | |
3851 | synch_process_alive = 0; | |
3852 | ||
3853 | /* Report the status of the synchronous process. */ | |
3854 | if (WIFEXITED (w)) | |
3855 | synch_process_retcode = WRETCODE (w); | |
3856 | else if (WIFSIGNALED (w)) | |
b97ad9ea RS |
3857 | { |
3858 | int code = WTERMSIG (w); | |
3859 | char *signame = 0; | |
3860 | ||
3861 | if (code < NSIG) | |
3862 | { | |
b0310da4 | 3863 | #ifndef VMS |
ed0cae05 RS |
3864 | /* Suppress warning if the table has const char *. */ |
3865 | signame = (char *) sys_siglist[code]; | |
b0310da4 | 3866 | #else |
b97ad9ea | 3867 | signame = sys_errlist[code]; |
b0310da4 | 3868 | #endif |
b97ad9ea RS |
3869 | } |
3870 | if (signame == 0) | |
3871 | signame = "unknown"; | |
3872 | ||
3873 | synch_process_death = signame; | |
3874 | } | |
6be429b1 JB |
3875 | |
3876 | /* Tell wait_reading_process_input that it needs to wake up and | |
3877 | look around. */ | |
3878 | if (input_available_clear_time) | |
3879 | EMACS_SET_SECS_USECS (*input_available_clear_time, 0, 0); | |
d0d6b7c5 JB |
3880 | } |
3881 | ||
3882 | /* On some systems, we must return right away. | |
3883 | If any more processes want to signal us, we will | |
3884 | get another signal. | |
3885 | Otherwise (on systems that have WNOHANG), loop around | |
3886 | to use up all the processes that have something to tell us. */ | |
e98d950b | 3887 | #if defined (USG) && ! (defined (HPUX) && defined (WNOHANG)) || defined (WINDOWSNT) |
3c0ee47b | 3888 | #if defined (USG) && ! defined (POSIX_SIGNALS) |
d0d6b7c5 JB |
3889 | signal (signo, sigchld_handler); |
3890 | #endif | |
3891 | errno = old_errno; | |
3892 | return; | |
3893 | #endif /* USG, but not HPUX with WNOHANG */ | |
3894 | } | |
3895 | } | |
3896 | \f | |
3897 | ||
3898 | static Lisp_Object | |
3899 | exec_sentinel_unwind (data) | |
3900 | Lisp_Object data; | |
3901 | { | |
3902 | XPROCESS (XCONS (data)->car)->sentinel = XCONS (data)->cdr; | |
3903 | return Qnil; | |
3904 | } | |
3905 | ||
3b9a3dfa RS |
3906 | static Lisp_Object |
3907 | exec_sentinel_error_handler (error) | |
3908 | Lisp_Object error; | |
3909 | { | |
3910 | cmd_error_internal (error, "error in process sentinel: "); | |
3911 | Vinhibit_quit = Qt; | |
3912 | update_echo_area (); | |
833ba342 | 3913 | Fsleep_for (make_number (2), Qnil); |
3b9a3dfa RS |
3914 | } |
3915 | ||
d0d6b7c5 JB |
3916 | static void |
3917 | exec_sentinel (proc, reason) | |
3918 | Lisp_Object proc, reason; | |
3919 | { | |
dfc21838 | 3920 | Lisp_Object sentinel, obuffer, odeactivate, okeymap; |
d0d6b7c5 JB |
3921 | register struct Lisp_Process *p = XPROCESS (proc); |
3922 | int count = specpdl_ptr - specpdl; | |
4da2f5be | 3923 | int outer_running_asynch_code = running_asynch_code; |
d0d6b7c5 | 3924 | |
dfc21838 RS |
3925 | /* No need to gcpro these, because all we do with them later |
3926 | is test them for EQness, and none of them should be a string. */ | |
8fb3cf64 | 3927 | odeactivate = Vdeactivate_mark; |
dfc21838 RS |
3928 | XSETBUFFER (obuffer, current_buffer); |
3929 | okeymap = current_buffer->keymap; | |
3930 | ||
d0d6b7c5 JB |
3931 | sentinel = p->sentinel; |
3932 | if (NILP (sentinel)) | |
3933 | return; | |
3934 | ||
3935 | /* Zilch the sentinel while it's running, to avoid recursive invocations; | |
3936 | assure that it gets restored no matter how the sentinel exits. */ | |
3937 | p->sentinel = Qnil; | |
3938 | record_unwind_protect (exec_sentinel_unwind, Fcons (proc, sentinel)); | |
3939 | /* Inhibit quit so that random quits don't screw up a running filter. */ | |
3940 | specbind (Qinhibit_quit, Qt); | |
6545aada | 3941 | specbind (Qlast_nonmenu_event, Qt); |
3b9a3dfa | 3942 | |
4da2f5be RS |
3943 | /* In case we get recursively called, |
3944 | and we already saved the match data nonrecursively, | |
3945 | save the same match data in safely recursive fashion. */ | |
3946 | if (outer_running_asynch_code) | |
3947 | { | |
3948 | Lisp_Object tem; | |
dd130227 | 3949 | tem = Fmatch_data (Qnil, Qnil); |
4da2f5be | 3950 | restore_match_data (); |
dd130227 | 3951 | record_unwind_protect (Fstore_match_data, Fmatch_data (Qnil, Qnil)); |
4da2f5be RS |
3952 | Fstore_match_data (tem); |
3953 | } | |
3954 | ||
3955 | /* For speed, if a search happens within this code, | |
3956 | save the match data in a special nonrecursive fashion. */ | |
7074fde6 | 3957 | running_asynch_code = 1; |
4da2f5be | 3958 | |
3b9a3dfa RS |
3959 | internal_condition_case_1 (read_process_output_call, |
3960 | Fcons (sentinel, | |
3961 | Fcons (proc, Fcons (reason, Qnil))), | |
3962 | !NILP (Vdebug_on_error) ? Qnil : Qerror, | |
3963 | exec_sentinel_error_handler); | |
4da2f5be RS |
3964 | |
3965 | /* If we saved the match data nonrecursively, restore it now. */ | |
7074fde6 | 3966 | restore_match_data (); |
4da2f5be | 3967 | running_asynch_code = outer_running_asynch_code; |
8fb3cf64 KH |
3968 | |
3969 | Vdeactivate_mark = odeactivate; | |
7973cfa8 | 3970 | #if 0 |
dfc21838 RS |
3971 | if (! EQ (Fcurrent_buffer (), obuffer) |
3972 | || ! EQ (current_buffer->keymap, okeymap)) | |
7973cfa8 | 3973 | #endif |
927e08be RS |
3974 | /* But do it only if the caller is actually going to read events. |
3975 | Otherwise there's no need to make him wake up, and it could | |
3976 | cause trouble (for example it would make Fsit_for return). */ | |
3977 | if (waiting_for_user_input_p == -1) | |
3978 | record_asynch_buffer_change (); | |
8fb3cf64 | 3979 | |
2ea6d561 | 3980 | unbind_to (count, Qnil); |
d0d6b7c5 JB |
3981 | } |
3982 | ||
3983 | /* Report all recent events of a change in process status | |
3984 | (either run the sentinel or output a message). | |
3985 | This is done while Emacs is waiting for keyboard input. */ | |
3986 | ||
3987 | status_notify () | |
3988 | { | |
3989 | register Lisp_Object proc, buffer; | |
2e4149a8 | 3990 | Lisp_Object tail, msg; |
d0d6b7c5 JB |
3991 | struct gcpro gcpro1, gcpro2; |
3992 | ||
2e4149a8 KH |
3993 | tail = Qnil; |
3994 | msg = Qnil; | |
d0d6b7c5 JB |
3995 | /* We need to gcpro tail; if read_process_output calls a filter |
3996 | which deletes a process and removes the cons to which tail points | |
3997 | from Vprocess_alist, and then causes a GC, tail is an unprotected | |
3998 | reference. */ | |
3999 | GCPRO2 (tail, msg); | |
4000 | ||
30623085 RS |
4001 | /* Set this now, so that if new processes are created by sentinels |
4002 | that we run, we get called again to handle their status changes. */ | |
4003 | update_tick = process_tick; | |
4004 | ||
4005 | for (tail = Vprocess_alist; !NILP (tail); tail = Fcdr (tail)) | |
d0d6b7c5 | 4006 | { |
30623085 RS |
4007 | Lisp_Object symbol; |
4008 | register struct Lisp_Process *p; | |
4009 | ||
4010 | proc = Fcdr (Fcar (tail)); | |
4011 | p = XPROCESS (proc); | |
4012 | ||
4013 | if (XINT (p->tick) != XINT (p->update_tick)) | |
d0d6b7c5 | 4014 | { |
30623085 | 4015 | XSETINT (p->update_tick, XINT (p->tick)); |
d0d6b7c5 | 4016 | |
30623085 | 4017 | /* If process is still active, read any output that remains. */ |
4da2f5be RS |
4018 | while (! EQ (p->filter, Qt) |
4019 | && XINT (p->infd) >= 0 | |
4020 | && read_process_output (proc, XINT (p->infd)) > 0); | |
d0d6b7c5 | 4021 | |
30623085 | 4022 | buffer = p->buffer; |
d0d6b7c5 | 4023 | |
30623085 RS |
4024 | /* Get the text to use for the message. */ |
4025 | if (!NILP (p->raw_status_low)) | |
4026 | update_status (p); | |
4027 | msg = status_message (p->status); | |
d0d6b7c5 | 4028 | |
30623085 RS |
4029 | /* If process is terminated, deactivate it or delete it. */ |
4030 | symbol = p->status; | |
4031 | if (CONSP (p->status)) | |
4032 | symbol = XCONS (p->status)->car; | |
d0d6b7c5 | 4033 | |
30623085 RS |
4034 | if (EQ (symbol, Qsignal) || EQ (symbol, Qexit) |
4035 | || EQ (symbol, Qclosed)) | |
4036 | { | |
4037 | if (delete_exited_processes) | |
4038 | remove_process (proc); | |
4039 | else | |
4040 | deactivate_process (proc); | |
4041 | } | |
d0d6b7c5 | 4042 | |
0ad61fe7 RS |
4043 | /* The actions above may have further incremented p->tick. |
4044 | So set p->update_tick again | |
4045 | so that an error in the sentinel will not cause | |
4046 | this code to be run again. */ | |
4047 | XSETINT (p->update_tick, XINT (p->tick)); | |
30623085 RS |
4048 | /* Now output the message suitably. */ |
4049 | if (!NILP (p->sentinel)) | |
4050 | exec_sentinel (proc, msg); | |
4051 | /* Don't bother with a message in the buffer | |
4052 | when a process becomes runnable. */ | |
4053 | else if (!EQ (symbol, Qrun) && !NILP (buffer)) | |
4054 | { | |
4055 | Lisp_Object ro, tem; | |
4056 | struct buffer *old = current_buffer; | |
4057 | int opoint; | |
12ca5cdf | 4058 | int before; |
2e4149a8 | 4059 | |
30623085 | 4060 | ro = XBUFFER (buffer)->read_only; |
d0d6b7c5 | 4061 | |
30623085 RS |
4062 | /* Avoid error if buffer is deleted |
4063 | (probably that's why the process is dead, too) */ | |
4064 | if (NILP (XBUFFER (buffer)->name)) | |
4065 | continue; | |
4066 | Fset_buffer (buffer); | |
12ca5cdf | 4067 | |
6ec8bbd2 | 4068 | opoint = PT; |
30623085 RS |
4069 | /* Insert new output into buffer |
4070 | at the current end-of-output marker, | |
4071 | thus preserving logical ordering of input and output. */ | |
4072 | if (XMARKER (p->mark)->buffer) | |
4073 | SET_PT (marker_position (p->mark)); | |
4074 | else | |
4075 | SET_PT (ZV); | |
12ca5cdf RS |
4076 | |
4077 | before = PT; | |
30623085 RS |
4078 | |
4079 | tem = current_buffer->read_only; | |
4080 | current_buffer->read_only = Qnil; | |
4081 | insert_string ("\nProcess "); | |
4082 | Finsert (1, &p->name); | |
4083 | insert_string (" "); | |
4084 | Finsert (1, &msg); | |
4085 | current_buffer->read_only = tem; | |
6ec8bbd2 | 4086 | Fset_marker (p->mark, make_number (PT), p->buffer); |
30623085 | 4087 | |
12ca5cdf RS |
4088 | if (opoint >= before) |
4089 | SET_PT (opoint + (PT - before)); | |
4090 | else | |
4091 | SET_PT (opoint); | |
4092 | ||
30623085 | 4093 | set_buffer_internal (old); |
d0d6b7c5 | 4094 | } |
30623085 RS |
4095 | } |
4096 | } /* end for */ | |
d0d6b7c5 JB |
4097 | |
4098 | update_mode_lines++; /* in case buffers use %s in mode-line-format */ | |
4099 | redisplay_preserve_echo_area (); | |
4100 | ||
d0d6b7c5 JB |
4101 | UNGCPRO; |
4102 | } | |
0fa1789e KH |
4103 | |
4104 | \f | |
4105 | DEFUN ("set-process-coding-system", Fset_process_coding_system, | |
4106 | Sset_process_coding_system, 1, 3, 0, | |
a95c35f6 | 4107 | "Set coding systems of PROCESS to DECODING (input from the process) and\n\ |
0fa1789e KH |
4108 | ENCODING (output to the process).") |
4109 | (proc, decoding, encoding) | |
4110 | register Lisp_Object proc, decoding, encoding; | |
4111 | { | |
4112 | register struct Lisp_Process *p; | |
4113 | ||
4114 | CHECK_PROCESS (proc, 0); | |
4115 | p = XPROCESS (proc); | |
4116 | if (XINT (p->infd) < 0) | |
4117 | error ("Input file descriptor of %s closed", XSTRING (p->name)->data); | |
4118 | if (XINT (p->outfd) < 0) | |
4119 | error ("Output file descriptor of %s closed", XSTRING (p->name)->data); | |
4120 | ||
4121 | p->decode_coding_system = Fcheck_coding_system (decoding); | |
4122 | p->encode_coding_system = Fcheck_coding_system (encoding); | |
4123 | setup_coding_system (decoding, | |
c7580538 | 4124 | proc_decode_coding_system[XINT (p->infd)]); |
0fa1789e | 4125 | setup_coding_system (encoding, |
c7580538 | 4126 | proc_encode_coding_system[XINT (p->outfd)]); |
0fa1789e KH |
4127 | |
4128 | return Qnil; | |
4129 | } | |
4130 | ||
4131 | DEFUN ("process-coding-system", | |
4132 | Fprocess_coding_system, Sprocess_coding_system, 1, 1, 0, | |
a95c35f6 | 4133 | "Return a cons of coding systems for decoding and encoding of PROCESS.") |
0fa1789e KH |
4134 | (proc) |
4135 | register Lisp_Object proc; | |
4136 | { | |
4137 | CHECK_PROCESS (proc, 0); | |
4138 | return Fcons (XPROCESS (proc)->decode_coding_system, | |
4139 | XPROCESS (proc)->encode_coding_system); | |
4140 | } | |
d0d6b7c5 | 4141 | \f |
a69281ff RS |
4142 | /* The first time this is called, assume keyboard input comes from DESC |
4143 | instead of from where we used to expect it. | |
4144 | Subsequent calls mean assume input keyboard can come from DESC | |
4145 | in addition to other places. */ | |
4146 | ||
4147 | static int add_keyboard_wait_descriptor_called_flag; | |
4148 | ||
4149 | void | |
4150 | add_keyboard_wait_descriptor (desc) | |
4151 | int desc; | |
4152 | { | |
4153 | if (! add_keyboard_wait_descriptor_called_flag) | |
4154 | FD_CLR (0, &input_wait_mask); | |
4155 | add_keyboard_wait_descriptor_called_flag = 1; | |
4156 | FD_SET (desc, &input_wait_mask); | |
b5dc1c83 | 4157 | FD_SET (desc, &non_process_wait_mask); |
a69281ff RS |
4158 | if (desc > max_keyboard_desc) |
4159 | max_keyboard_desc = desc; | |
4160 | } | |
4161 | ||
4162 | /* From now on, do not expect DESC to give keyboard input. */ | |
4163 | ||
4164 | void | |
4165 | delete_keyboard_wait_descriptor (desc) | |
4166 | int desc; | |
4167 | { | |
4168 | int fd; | |
4169 | int lim = max_keyboard_desc; | |
4170 | ||
4171 | FD_CLR (desc, &input_wait_mask); | |
b5dc1c83 | 4172 | FD_CLR (desc, &non_process_wait_mask); |
a69281ff RS |
4173 | |
4174 | if (desc == max_keyboard_desc) | |
4175 | for (fd = 0; fd < lim; fd++) | |
4176 | if (FD_ISSET (fd, &input_wait_mask) | |
4177 | && !FD_ISSET (fd, &non_keyboard_wait_mask)) | |
4178 | max_keyboard_desc = fd; | |
4179 | } | |
4180 | ||
4181 | /* Return nonzero if *MASK has a bit set | |
4182 | that corresponds to one of the keyboard input descriptors. */ | |
4183 | ||
4184 | int | |
4185 | keyboard_bit_set (mask) | |
4186 | SELECT_TYPE *mask; | |
4187 | { | |
4188 | int fd; | |
4189 | ||
ee8e09af | 4190 | for (fd = 0; fd <= max_keyboard_desc; fd++) |
a69281ff RS |
4191 | if (FD_ISSET (fd, mask) && FD_ISSET (fd, &input_wait_mask) |
4192 | && !FD_ISSET (fd, &non_keyboard_wait_mask)) | |
4193 | return 1; | |
4194 | ||
4195 | return 0; | |
4196 | } | |
4197 | \f | |
d0d6b7c5 JB |
4198 | init_process () |
4199 | { | |
4200 | register int i; | |
4201 | ||
4202 | #ifdef SIGCHLD | |
4203 | #ifndef CANNOT_DUMP | |
4204 | if (! noninteractive || initialized) | |
4205 | #endif | |
4206 | signal (SIGCHLD, sigchld_handler); | |
4207 | #endif | |
4208 | ||
4209 | FD_ZERO (&input_wait_mask); | |
a69281ff | 4210 | FD_ZERO (&non_keyboard_wait_mask); |
b5dc1c83 | 4211 | FD_ZERO (&non_process_wait_mask); |
7d0e672e | 4212 | max_process_desc = 0; |
dd2281ae | 4213 | |
a69281ff | 4214 | FD_SET (0, &input_wait_mask); |
dd2281ae | 4215 | |
d0d6b7c5 JB |
4216 | Vprocess_alist = Qnil; |
4217 | for (i = 0; i < MAXDESC; i++) | |
4218 | { | |
4219 | chan_process[i] = Qnil; | |
4220 | proc_buffered_char[i] = -1; | |
4221 | } | |
c7580538 KH |
4222 | bzero (proc_decode_coding_system, sizeof proc_decode_coding_system); |
4223 | bzero (proc_encode_coding_system, sizeof proc_encode_coding_system); | |
d0d6b7c5 | 4224 | } |
312c9964 | 4225 | |
d0d6b7c5 JB |
4226 | syms_of_process () |
4227 | { | |
d0d6b7c5 JB |
4228 | Qprocessp = intern ("processp"); |
4229 | staticpro (&Qprocessp); | |
4230 | Qrun = intern ("run"); | |
4231 | staticpro (&Qrun); | |
4232 | Qstop = intern ("stop"); | |
4233 | staticpro (&Qstop); | |
4234 | Qsignal = intern ("signal"); | |
4235 | staticpro (&Qsignal); | |
4236 | ||
4237 | /* Qexit is already staticpro'd by syms_of_eval; don't staticpro it | |
4238 | here again. | |
4239 | ||
4240 | Qexit = intern ("exit"); | |
4241 | staticpro (&Qexit); */ | |
4242 | ||
4243 | Qopen = intern ("open"); | |
4244 | staticpro (&Qopen); | |
4245 | Qclosed = intern ("closed"); | |
4246 | staticpro (&Qclosed); | |
4247 | ||
6545aada RS |
4248 | Qlast_nonmenu_event = intern ("last-nonmenu-event"); |
4249 | staticpro (&Qlast_nonmenu_event); | |
4250 | ||
d0d6b7c5 JB |
4251 | staticpro (&Vprocess_alist); |
4252 | ||
4253 | DEFVAR_BOOL ("delete-exited-processes", &delete_exited_processes, | |
4254 | "*Non-nil means delete processes immediately when they exit.\n\ | |
4255 | nil means don't delete them until `list-processes' is run."); | |
4256 | ||
4257 | delete_exited_processes = 1; | |
4258 | ||
4259 | DEFVAR_LISP ("process-connection-type", &Vprocess_connection_type, | |
4260 | "Control type of device used to communicate with subprocesses.\n\ | |
e333e864 RS |
4261 | Values are nil to use a pipe, or t or `pty' to use a pty.\n\ |
4262 | The value has no effect if the system has no ptys or if all ptys are busy:\n\ | |
4263 | then a pipe is used in any case.\n\ | |
4264 | The value takes effect when `start-process' is called."); | |
d0d6b7c5 JB |
4265 | Vprocess_connection_type = Qt; |
4266 | ||
4267 | defsubr (&Sprocessp); | |
4268 | defsubr (&Sget_process); | |
4269 | defsubr (&Sget_buffer_process); | |
4270 | defsubr (&Sdelete_process); | |
4271 | defsubr (&Sprocess_status); | |
4272 | defsubr (&Sprocess_exit_status); | |
4273 | defsubr (&Sprocess_id); | |
4274 | defsubr (&Sprocess_name); | |
3b9a3dfa | 4275 | defsubr (&Sprocess_tty_name); |
d0d6b7c5 JB |
4276 | defsubr (&Sprocess_command); |
4277 | defsubr (&Sset_process_buffer); | |
4278 | defsubr (&Sprocess_buffer); | |
4279 | defsubr (&Sprocess_mark); | |
4280 | defsubr (&Sset_process_filter); | |
4281 | defsubr (&Sprocess_filter); | |
4282 | defsubr (&Sset_process_sentinel); | |
4283 | defsubr (&Sprocess_sentinel); | |
de282a05 | 4284 | defsubr (&Sset_process_window_size); |
d0d6b7c5 | 4285 | defsubr (&Sprocess_kill_without_query); |
de282a05 | 4286 | defsubr (&Sprocess_contact); |
d0d6b7c5 JB |
4287 | defsubr (&Slist_processes); |
4288 | defsubr (&Sprocess_list); | |
4289 | defsubr (&Sstart_process); | |
4290 | #ifdef HAVE_SOCKETS | |
4291 | defsubr (&Sopen_network_stream); | |
4292 | #endif /* HAVE_SOCKETS */ | |
4293 | defsubr (&Saccept_process_output); | |
4294 | defsubr (&Sprocess_send_region); | |
4295 | defsubr (&Sprocess_send_string); | |
4296 | defsubr (&Sinterrupt_process); | |
4297 | defsubr (&Skill_process); | |
4298 | defsubr (&Squit_process); | |
4299 | defsubr (&Sstop_process); | |
4300 | defsubr (&Scontinue_process); | |
4301 | defsubr (&Sprocess_send_eof); | |
4302 | defsubr (&Ssignal_process); | |
4303 | defsubr (&Swaiting_for_user_input_p); | |
4304 | /* defsubr (&Sprocess_connection); */ | |
0fa1789e KH |
4305 | defsubr (&Sset_process_coding_system); |
4306 | defsubr (&Sprocess_coding_system); | |
d0d6b7c5 JB |
4307 | } |
4308 | ||
6720a7fb JB |
4309 | \f |
4310 | #else /* not subprocesses */ | |
4311 | ||
4312 | #include <sys/types.h> | |
4313 | #include <errno.h> | |
4314 | ||
4315 | #include "lisp.h" | |
4316 | #include "systime.h" | |
4317 | #include "termopts.h" | |
81afb6d1 | 4318 | #include "sysselect.h" |
6720a7fb | 4319 | |
ff11dfa1 | 4320 | extern int frame_garbaged; |
6720a7fb | 4321 | |
f694e5d2 KH |
4322 | extern EMACS_TIME timer_check (); |
4323 | extern int timers_run; | |
6720a7fb JB |
4324 | |
4325 | /* As described above, except assuming that there are no subprocesses: | |
4326 | ||
4327 | Wait for timeout to elapse and/or keyboard input to be available. | |
4328 | ||
4329 | time_limit is: | |
4330 | timeout in seconds, or | |
4331 | zero for no limit, or | |
4332 | -1 means gobble data immediately available but don't wait for any. | |
4333 | ||
f76475ad | 4334 | read_kbd is a Lisp_Object: |
6720a7fb JB |
4335 | 0 to ignore keyboard input, or |
4336 | 1 to return when input is available, or | |
4337 | -1 means caller will actually read the input, so don't throw to | |
4338 | the quit handler. | |
0a65b032 RS |
4339 | a cons cell, meaning wait until its car is non-nil |
4340 | (and gobble terminal input into the buffer if any arrives), or | |
6720a7fb JB |
4341 | We know that read_kbd will never be a Lisp_Process, since |
4342 | `subprocesses' isn't defined. | |
4343 | ||
4344 | do_display != 0 means redisplay should be done to show subprocess | |
5164ee8e | 4345 | output that arrives. |
6720a7fb | 4346 | |
eb8c3be9 | 4347 | Return true iff we received input from any process. */ |
6720a7fb JB |
4348 | |
4349 | int | |
4350 | wait_reading_process_input (time_limit, microsecs, read_kbd, do_display) | |
f76475ad JB |
4351 | int time_limit, microsecs; |
4352 | Lisp_Object read_kbd; | |
4353 | int do_display; | |
6720a7fb | 4354 | { |
f694e5d2 | 4355 | EMACS_TIME end_time, timeout; |
8db121c4 | 4356 | SELECT_TYPE waitchannels; |
f694e5d2 | 4357 | int xerrno; |
0a65b032 RS |
4358 | Lisp_Object *wait_for_cell = 0; |
4359 | ||
4360 | /* If waiting for non-nil in a cell, record where. */ | |
4361 | if (CONSP (read_kbd)) | |
4362 | { | |
4363 | wait_for_cell = &XCONS (read_kbd)->car; | |
4364 | XSETFASTINT (read_kbd, 0); | |
4365 | } | |
6720a7fb JB |
4366 | |
4367 | /* What does time_limit really mean? */ | |
4368 | if (time_limit || microsecs) | |
4369 | { | |
6720a7fb JB |
4370 | if (time_limit == -1) |
4371 | /* In fact, it's zero. */ | |
4372 | EMACS_SET_SECS_USECS (timeout, 0, 0); | |
4373 | else | |
4374 | EMACS_SET_SECS_USECS (timeout, time_limit, microsecs); | |
4375 | ||
4376 | /* How far in the future is that? */ | |
4377 | EMACS_GET_TIME (end_time); | |
4378 | EMACS_ADD_TIME (end_time, end_time, timeout); | |
4379 | } | |
4380 | else | |
4381 | /* It's infinite. */ | |
f694e5d2 | 4382 | EMACS_SET_SECS_USECS (timeout, 100000, 0); |
6720a7fb JB |
4383 | |
4384 | /* Turn off periodic alarms (in case they are in use) | |
4385 | because the select emulator uses alarms. */ | |
4386 | stop_polling (); | |
4387 | ||
4388 | for (;;) | |
4389 | { | |
4390 | int nfds; | |
bae8d137 | 4391 | int timeout_reduced_for_timers = 0; |
6720a7fb | 4392 | |
6720a7fb JB |
4393 | /* If calling from keyboard input, do not quit |
4394 | since we want to return C-g as an input character. | |
4395 | Otherwise, do pending quit if requested. */ | |
f76475ad | 4396 | if (XINT (read_kbd) >= 0) |
6720a7fb JB |
4397 | QUIT; |
4398 | ||
0a65b032 RS |
4399 | /* Exit now if the cell we're waiting for became non-nil. */ |
4400 | if (wait_for_cell && ! NILP (*wait_for_cell)) | |
4401 | break; | |
4402 | ||
bae8d137 RS |
4403 | /* Compute time from now till when time limit is up */ |
4404 | /* Exit if already run out */ | |
f694e5d2 | 4405 | if (time_limit > 0 || microsecs) |
6720a7fb | 4406 | { |
f694e5d2 KH |
4407 | EMACS_GET_TIME (timeout); |
4408 | EMACS_SUB_TIME (timeout, end_time, timeout); | |
4409 | if (EMACS_TIME_NEG_P (timeout)) | |
6720a7fb JB |
4410 | break; |
4411 | } | |
4412 | ||
bae8d137 RS |
4413 | /* If our caller will not immediately handle keyboard events, |
4414 | run timer events directly. | |
4415 | (Callers that will immediately read keyboard events | |
4416 | call timer_delay on their own.) */ | |
f854a00b | 4417 | if (! wait_for_cell) |
bae8d137 RS |
4418 | { |
4419 | EMACS_TIME timer_delay; | |
0a65b032 RS |
4420 | int old_timers_run; |
4421 | ||
4422 | retry: | |
4423 | old_timers_run = timers_run; | |
bae8d137 RS |
4424 | timer_delay = timer_check (1); |
4425 | if (timers_run != old_timers_run && do_display) | |
0a65b032 RS |
4426 | { |
4427 | redisplay_preserve_echo_area (); | |
4428 | /* We must retry, since a timer may have requeued itself | |
4429 | and that could alter the time delay. */ | |
4430 | goto retry; | |
4431 | } | |
4432 | ||
f694e5d2 | 4433 | if (! EMACS_TIME_NEG_P (timer_delay) && time_limit != -1) |
bae8d137 RS |
4434 | { |
4435 | EMACS_TIME difference; | |
f694e5d2 | 4436 | EMACS_SUB_TIME (difference, timer_delay, timeout); |
bae8d137 RS |
4437 | if (EMACS_TIME_NEG_P (difference)) |
4438 | { | |
f694e5d2 | 4439 | timeout = timer_delay; |
bae8d137 RS |
4440 | timeout_reduced_for_timers = 1; |
4441 | } | |
4442 | } | |
4443 | } | |
4444 | ||
6720a7fb JB |
4445 | /* Cause C-g and alarm signals to take immediate action, |
4446 | and cause input available signals to zero out timeout. */ | |
f76475ad | 4447 | if (XINT (read_kbd) < 0) |
6720a7fb JB |
4448 | set_waiting_for_input (&timeout); |
4449 | ||
0a65b032 RS |
4450 | /* Wait till there is something to do. */ |
4451 | ||
4452 | if (! XINT (read_kbd) && wait_for_cell == 0) | |
4453 | FD_ZERO (&waitchannels); | |
4454 | else | |
4455 | FD_SET (0, &waitchannels); | |
4456 | ||
ff11dfa1 | 4457 | /* If a frame has been newly mapped and needs updating, |
6720a7fb | 4458 | reprocess its display stuff. */ |
5164ee8e | 4459 | if (frame_garbaged && do_display) |
0a65b032 RS |
4460 | { |
4461 | clear_waiting_for_input (); | |
4462 | redisplay_preserve_echo_area (); | |
4463 | if (XINT (read_kbd) < 0) | |
4464 | set_waiting_for_input (&timeout); | |
4465 | } | |
6720a7fb | 4466 | |
1861b214 RS |
4467 | if (XINT (read_kbd) && detect_input_pending ()) |
4468 | { | |
4469 | nfds = 0; | |
4470 | FD_ZERO (&waitchannels); | |
4471 | } | |
4472 | else | |
4473 | nfds = select (1, &waitchannels, (SELECT_TYPE *)0, (SELECT_TYPE *)0, | |
4474 | &timeout); | |
f694e5d2 KH |
4475 | |
4476 | xerrno = errno; | |
6720a7fb JB |
4477 | |
4478 | /* Make C-g and alarm signals set flags again */ | |
4479 | clear_waiting_for_input (); | |
4480 | ||
4481 | /* If we woke up due to SIGWINCH, actually change size now. */ | |
4482 | do_pending_window_change (); | |
4483 | ||
f694e5d2 KH |
4484 | if (time_limit && nfds == 0 && ! timeout_reduced_for_timers) |
4485 | /* We waited the full specified time, so return now. */ | |
4486 | break; | |
4487 | ||
6720a7fb JB |
4488 | if (nfds == -1) |
4489 | { | |
4490 | /* If the system call was interrupted, then go around the | |
4491 | loop again. */ | |
f694e5d2 | 4492 | if (xerrno == EINTR) |
8db121c4 | 4493 | FD_ZERO (&waitchannels); |
f694e5d2 KH |
4494 | else |
4495 | error ("select error: %s", strerror (xerrno)); | |
6720a7fb JB |
4496 | } |
4497 | #ifdef sun | |
4498 | else if (nfds > 0 && (waitchannels & 1) && interrupt_input) | |
4499 | /* System sometimes fails to deliver SIGIO. */ | |
4500 | kill (getpid (), SIGIO); | |
4501 | #endif | |
7324d660 | 4502 | #ifdef SIGIO |
f76475ad | 4503 | if (XINT (read_kbd) && interrupt_input && (waitchannels & 1)) |
e643c5be | 4504 | kill (getpid (), SIGIO); |
7324d660 | 4505 | #endif |
6720a7fb | 4506 | |
f694e5d2 KH |
4507 | /* Check for keyboard input */ |
4508 | ||
f854a00b | 4509 | if ((XINT (read_kbd) != 0) |
f694e5d2 KH |
4510 | && detect_input_pending_run_timers (do_display)) |
4511 | { | |
4512 | swallow_events (do_display); | |
4513 | if (detect_input_pending_run_timers (do_display)) | |
4514 | break; | |
4515 | } | |
0a65b032 | 4516 | |
f854a00b RS |
4517 | /* If wait_for_cell. check for keyboard input |
4518 | but don't run any timers. | |
4519 | ??? (It seems wrong to me to check for keyboard | |
4520 | input at all when wait_for_cell, but the code | |
4521 | has been this way since July 1994. | |
4522 | Try changing this after version 19.31.) */ | |
4523 | if (wait_for_cell | |
4524 | && detect_input_pending ()) | |
4525 | { | |
4526 | swallow_events (do_display); | |
4527 | if (detect_input_pending ()) | |
4528 | break; | |
4529 | } | |
4530 | ||
0a65b032 RS |
4531 | /* Exit now if the cell we're waiting for became non-nil. */ |
4532 | if (wait_for_cell && ! NILP (*wait_for_cell)) | |
4533 | break; | |
6720a7fb JB |
4534 | } |
4535 | ||
a87b802f JB |
4536 | start_polling (); |
4537 | ||
6720a7fb JB |
4538 | return 0; |
4539 | } | |
4540 | ||
4541 | ||
4542 | DEFUN ("get-buffer-process", Fget_buffer_process, Sget_buffer_process, 1, 1, 0, | |
51ab806a | 4543 | /* Don't confuse make-docfile by having two doc strings for this function. |
312c9964 RS |
4544 | make-docfile does not pay attention to #if, for good reason! */ |
4545 | 0) | |
6720a7fb JB |
4546 | (name) |
4547 | register Lisp_Object name; | |
4548 | { | |
4549 | return Qnil; | |
4550 | } | |
4551 | ||
4552 | /* Kill all processes associated with `buffer'. | |
4553 | If `buffer' is nil, kill all processes. | |
4554 | Since we have no subprocesses, this does nothing. */ | |
4555 | ||
4556 | kill_buffer_processes (buffer) | |
4557 | Lisp_Object buffer; | |
4558 | { | |
4559 | } | |
4560 | ||
4561 | init_process () | |
4562 | { | |
4563 | } | |
4564 | ||
4565 | syms_of_process () | |
4566 | { | |
4567 | defsubr (&Sget_buffer_process); | |
4568 | } | |
4569 | ||
4570 | \f | |
4571 | #endif /* not subprocesses */ |