Commit | Line | Data |
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d0d6b7c5 | 1 | /* Asynchronous subprocess control for GNU Emacs. |
c6c5df7f | 2 | Copyright (C) 1985, 1986, 1987, 1988, 1993 Free Software Foundation, Inc. |
d0d6b7c5 JB |
3 | |
4 | This file is part of GNU Emacs. | |
5 | ||
6 | GNU Emacs is free software; you can redistribute it and/or modify | |
7 | it under the terms of the GNU General Public License as published by | |
1dc77cc3 | 8 | the Free Software Foundation; either version 2, or (at your option) |
d0d6b7c5 JB |
9 | any later version. |
10 | ||
11 | GNU Emacs is distributed in the hope that it will be useful, | |
12 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
14 | GNU General Public License for more details. | |
15 | ||
16 | You should have received a copy of the GNU General Public License | |
17 | along with GNU Emacs; see the file COPYING. If not, write to | |
18 | the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. */ | |
19 | ||
20 | ||
21 | #include <signal.h> | |
22 | ||
18160b98 | 23 | #include <config.h> |
d0d6b7c5 | 24 | |
6720a7fb JB |
25 | /* This file is split into two parts by the following preprocessor |
26 | conditional. The 'then' clause contains all of the support for | |
27 | asynchronous subprocesses. The 'else' clause contains stub | |
28 | versions of some of the asynchronous subprocess routines that are | |
29 | often called elsewhere in Emacs, so we don't have to #ifdef the | |
30 | sections that call them. */ | |
31 | ||
32 | \f | |
d0d6b7c5 | 33 | #ifdef subprocesses |
d0d6b7c5 JB |
34 | |
35 | #include <stdio.h> | |
36 | #include <errno.h> | |
37 | #include <setjmp.h> | |
38 | #include <sys/types.h> /* some typedefs are used in sys/file.h */ | |
39 | #include <sys/file.h> | |
40 | #include <sys/stat.h> | |
41 | ||
42 | #ifdef HAVE_SOCKETS /* TCP connection support, if kernel can do it */ | |
43 | #include <sys/socket.h> | |
44 | #include <netdb.h> | |
45 | #include <netinet/in.h> | |
46 | #include <arpa/inet.h> | |
47 | #endif /* HAVE_SOCKETS */ | |
48 | ||
1d2c16fa RS |
49 | /* TERM is a poor-man's SLIP, used on Linux. */ |
50 | #ifdef TERM | |
51 | #include <client.h> | |
52 | #endif | |
53 | ||
79967d5e RS |
54 | /* DGUX inet_addr returns a 'struct in_addr'. */ |
55 | #ifdef DGUX | |
56 | #define IN_ADDR struct in_addr | |
57 | #define NUMERIC_ADDR_ERROR (numeric_addr.s_addr == -1) | |
58 | #else | |
59 | #define IN_ADDR unsigned long | |
60 | #define NUMERIC_ADDR_ERROR (numeric_addr == -1) | |
61 | #endif | |
62 | ||
d0d6b7c5 JB |
63 | #if defined(BSD) || defined(STRIDE) |
64 | #include <sys/ioctl.h> | |
0ad77c54 | 65 | #if !defined (O_NDELAY) && defined (HAVE_PTYS) && !defined(USG5) |
d0d6b7c5 JB |
66 | #include <fcntl.h> |
67 | #endif /* HAVE_PTYS and no O_NDELAY */ | |
68 | #endif /* BSD or STRIDE */ | |
d0d6b7c5 | 69 | |
99e3d726 RS |
70 | #ifdef BROKEN_O_NONBLOCK |
71 | #undef O_NONBLOCK | |
72 | #endif /* BROKEN_O_NONBLOCK */ | |
73 | ||
d0d6b7c5 JB |
74 | #ifdef NEED_BSDTTY |
75 | #include <bsdtty.h> | |
76 | #endif | |
77 | ||
d0d6b7c5 JB |
78 | #ifdef IRIS |
79 | #include <sys/sysmacros.h> /* for "minor" */ | |
80 | #endif /* not IRIS */ | |
81 | ||
82 | #include "systime.h" | |
36ebaafa | 83 | #include "systty.h" |
d0d6b7c5 JB |
84 | |
85 | #include "lisp.h" | |
86 | #include "window.h" | |
87 | #include "buffer.h" | |
88 | #include "process.h" | |
89 | #include "termhooks.h" | |
90 | #include "termopts.h" | |
91 | #include "commands.h" | |
1dc77cc3 | 92 | #include "frame.h" |
d0d6b7c5 | 93 | |
dd2281ae | 94 | Lisp_Object Qprocessp; |
d0d6b7c5 JB |
95 | Lisp_Object Qrun, Qstop, Qsignal, Qopen, Qclosed; |
96 | /* Qexit is declared and initialized in eval.c. */ | |
97 | ||
98 | /* a process object is a network connection when its childp field is neither | |
99 | Qt nor Qnil but is instead a string (name of foreign host we | |
100 | are connected to + name of port we are connected to) */ | |
101 | ||
102 | #ifdef HAVE_SOCKETS | |
103 | static Lisp_Object stream_process; | |
104 | ||
105 | #define NETCONN_P(p) (XGCTYPE (XPROCESS (p)->childp) == Lisp_String) | |
106 | #else | |
107 | #define NETCONN_P(p) 0 | |
108 | #endif /* HAVE_SOCKETS */ | |
109 | ||
110 | /* Define first descriptor number available for subprocesses. */ | |
111 | #ifdef VMS | |
112 | #define FIRST_PROC_DESC 1 | |
113 | #else /* Not VMS */ | |
114 | #define FIRST_PROC_DESC 3 | |
115 | #endif | |
116 | ||
117 | /* Define SIGCHLD as an alias for SIGCLD. There are many conditionals | |
118 | testing SIGCHLD. */ | |
119 | ||
120 | #if !defined (SIGCHLD) && defined (SIGCLD) | |
121 | #define SIGCHLD SIGCLD | |
122 | #endif /* SIGCLD */ | |
123 | ||
124 | #include "syssignal.h" | |
125 | ||
889255b4 | 126 | #include "syswait.h" |
d0d6b7c5 JB |
127 | |
128 | extern errno; | |
129 | extern sys_nerr; | |
130 | extern char *sys_errlist[]; | |
131 | ||
132 | #ifndef VMS | |
133 | #ifndef BSD4_1 | |
084fd64a | 134 | #ifndef LINUX |
d0d6b7c5 | 135 | extern char *sys_siglist[]; |
084fd64a | 136 | #endif |
d0d6b7c5 JB |
137 | #else |
138 | char *sys_siglist[] = | |
139 | { | |
140 | "bum signal!!", | |
141 | "hangup", | |
142 | "interrupt", | |
143 | "quit", | |
144 | "illegal instruction", | |
145 | "trace trap", | |
146 | "iot instruction", | |
147 | "emt instruction", | |
148 | "floating point exception", | |
149 | "kill", | |
150 | "bus error", | |
151 | "segmentation violation", | |
152 | "bad argument to system call", | |
153 | "write on a pipe with no one to read it", | |
154 | "alarm clock", | |
155 | "software termination signal from kill", | |
156 | "status signal", | |
157 | "sendable stop signal not from tty", | |
158 | "stop signal from tty", | |
159 | "continue a stopped process", | |
160 | "child status has changed", | |
161 | "background read attempted from control tty", | |
162 | "background write attempted from control tty", | |
163 | "input record available at control tty", | |
164 | "exceeded CPU time limit", | |
165 | "exceeded file size limit" | |
166 | }; | |
167 | #endif | |
168 | #endif /* VMS */ | |
169 | ||
d0d6b7c5 JB |
170 | /* t means use pty, nil means use a pipe, |
171 | maybe other values to come. */ | |
dd2281ae | 172 | static Lisp_Object Vprocess_connection_type; |
d0d6b7c5 JB |
173 | |
174 | #ifdef SKTPAIR | |
175 | #ifndef HAVE_SOCKETS | |
176 | #include <sys/socket.h> | |
177 | #endif | |
178 | #endif /* SKTPAIR */ | |
179 | ||
180 | /* Number of events of change of status of a process. */ | |
dd2281ae | 181 | static int process_tick; |
d0d6b7c5 JB |
182 | |
183 | /* Number of events for which the user or sentinel has been notified. */ | |
dd2281ae | 184 | static int update_tick; |
d0d6b7c5 JB |
185 | |
186 | #ifdef FD_SET | |
187 | /* We could get this from param.h, but better not to depend on finding that. | |
188 | And better not to risk that it might define other symbols used in this | |
189 | file. */ | |
334c4f2f RS |
190 | #ifdef FD_SETSIZE |
191 | #define MAXDESC FD_SETSIZE | |
192 | #else | |
d0d6b7c5 | 193 | #define MAXDESC 64 |
334c4f2f | 194 | #endif |
d0d6b7c5 JB |
195 | #define SELECT_TYPE fd_set |
196 | #else /* no FD_SET */ | |
197 | #define MAXDESC 32 | |
198 | #define SELECT_TYPE int | |
199 | ||
200 | /* Define the macros to access a single-int bitmap of descriptors. */ | |
201 | #define FD_SET(n, p) (*(p) |= (1 << (n))) | |
202 | #define FD_CLR(n, p) (*(p) &= ~(1 << (n))) | |
203 | #define FD_ISSET(n, p) (*(p) & (1 << (n))) | |
204 | #define FD_ZERO(p) (*(p) = 0) | |
205 | #endif /* no FD_SET */ | |
206 | ||
207 | /* Mask of bits indicating the descriptors that we wait for input on */ | |
208 | ||
dd2281ae RS |
209 | static SELECT_TYPE input_wait_mask; |
210 | ||
211 | /* Descriptor to use for keyboard input. */ | |
212 | static int keyboard_descriptor; | |
d0d6b7c5 | 213 | |
dd2281ae RS |
214 | /* Nonzero means delete a process right away if it exits. */ |
215 | static int delete_exited_processes; | |
d0d6b7c5 JB |
216 | |
217 | /* Indexed by descriptor, gives the process (if any) for that descriptor */ | |
dd2281ae | 218 | static Lisp_Object chan_process[MAXDESC]; |
d0d6b7c5 JB |
219 | |
220 | /* Alist of elements (NAME . PROCESS) */ | |
dd2281ae | 221 | static Lisp_Object Vprocess_alist; |
d0d6b7c5 JB |
222 | |
223 | /* Buffered-ahead input char from process, indexed by channel. | |
224 | -1 means empty (no char is buffered). | |
225 | Used on sys V where the only way to tell if there is any | |
226 | output from the process is to read at least one char. | |
227 | Always -1 on systems that support FIONREAD. */ | |
228 | ||
dd2281ae RS |
229 | static int proc_buffered_char[MAXDESC]; |
230 | ||
231 | static Lisp_Object get_process (); | |
d0d6b7c5 JB |
232 | \f |
233 | /* Compute the Lisp form of the process status, p->status, from | |
234 | the numeric status that was returned by `wait'. */ | |
235 | ||
f9738840 JB |
236 | Lisp_Object status_convert (); |
237 | ||
d0d6b7c5 JB |
238 | update_status (p) |
239 | struct Lisp_Process *p; | |
240 | { | |
241 | union { int i; WAITTYPE wt; } u; | |
242 | u.i = XFASTINT (p->raw_status_low) + (XFASTINT (p->raw_status_high) << 16); | |
243 | p->status = status_convert (u.wt); | |
244 | p->raw_status_low = Qnil; | |
245 | p->raw_status_high = Qnil; | |
246 | } | |
247 | ||
91d10fa8 | 248 | /* Convert a process status word in Unix format to |
d0d6b7c5 JB |
249 | the list that we use internally. */ |
250 | ||
251 | Lisp_Object | |
252 | status_convert (w) | |
253 | WAITTYPE w; | |
254 | { | |
255 | if (WIFSTOPPED (w)) | |
256 | return Fcons (Qstop, Fcons (make_number (WSTOPSIG (w)), Qnil)); | |
257 | else if (WIFEXITED (w)) | |
258 | return Fcons (Qexit, Fcons (make_number (WRETCODE (w)), | |
259 | WCOREDUMP (w) ? Qt : Qnil)); | |
260 | else if (WIFSIGNALED (w)) | |
261 | return Fcons (Qsignal, Fcons (make_number (WTERMSIG (w)), | |
262 | WCOREDUMP (w) ? Qt : Qnil)); | |
263 | else | |
264 | return Qrun; | |
265 | } | |
266 | ||
267 | /* Given a status-list, extract the three pieces of information | |
268 | and store them individually through the three pointers. */ | |
269 | ||
270 | void | |
271 | decode_status (l, symbol, code, coredump) | |
272 | Lisp_Object l; | |
273 | Lisp_Object *symbol; | |
274 | int *code; | |
275 | int *coredump; | |
276 | { | |
277 | Lisp_Object tem; | |
278 | ||
279 | if (XTYPE (l) == Lisp_Symbol) | |
280 | { | |
281 | *symbol = l; | |
282 | *code = 0; | |
283 | *coredump = 0; | |
284 | } | |
285 | else | |
286 | { | |
287 | *symbol = XCONS (l)->car; | |
288 | tem = XCONS (l)->cdr; | |
289 | *code = XFASTINT (XCONS (tem)->car); | |
f9738840 | 290 | tem = XCONS (tem)->cdr; |
d0d6b7c5 JB |
291 | *coredump = !NILP (tem); |
292 | } | |
293 | } | |
294 | ||
295 | /* Return a string describing a process status list. */ | |
296 | ||
297 | Lisp_Object | |
298 | status_message (status) | |
299 | Lisp_Object status; | |
300 | { | |
301 | Lisp_Object symbol; | |
302 | int code, coredump; | |
303 | Lisp_Object string, string2; | |
304 | ||
305 | decode_status (status, &symbol, &code, &coredump); | |
306 | ||
307 | if (EQ (symbol, Qsignal) || EQ (symbol, Qstop)) | |
308 | { | |
b0310da4 | 309 | #ifndef VMS |
d0d6b7c5 | 310 | string = build_string (code < NSIG ? sys_siglist[code] : "unknown"); |
b0310da4 JB |
311 | #else |
312 | string = build_string (code < NSIG ? sys_errlist[code] : "unknown"); | |
313 | #endif | |
d0d6b7c5 JB |
314 | string2 = build_string (coredump ? " (core dumped)\n" : "\n"); |
315 | XSTRING (string)->data[0] = DOWNCASE (XSTRING (string)->data[0]); | |
316 | return concat2 (string, string2); | |
317 | } | |
318 | else if (EQ (symbol, Qexit)) | |
319 | { | |
320 | if (code == 0) | |
321 | return build_string ("finished\n"); | |
f2980264 | 322 | string = Fnumber_to_string (make_number (code)); |
d0d6b7c5 JB |
323 | string2 = build_string (coredump ? " (core dumped)\n" : "\n"); |
324 | return concat2 (build_string ("exited abnormally with code "), | |
325 | concat2 (string, string2)); | |
326 | } | |
327 | else | |
328 | return Fcopy_sequence (Fsymbol_name (symbol)); | |
329 | } | |
330 | \f | |
331 | #ifdef HAVE_PTYS | |
d0d6b7c5 JB |
332 | |
333 | /* Open an available pty, returning a file descriptor. | |
334 | Return -1 on failure. | |
335 | The file name of the terminal corresponding to the pty | |
336 | is left in the variable pty_name. */ | |
337 | ||
338 | char pty_name[24]; | |
339 | ||
340 | int | |
341 | allocate_pty () | |
342 | { | |
343 | struct stat stb; | |
344 | register c, i; | |
345 | int fd; | |
346 | ||
32676c08 JB |
347 | /* Some systems name their pseudoterminals so that there are gaps in |
348 | the usual sequence - for example, on HP9000/S700 systems, there | |
349 | are no pseudoterminals with names ending in 'f'. So we wait for | |
350 | three failures in a row before deciding that we've reached the | |
351 | end of the ptys. */ | |
352 | int failed_count = 0; | |
353 | ||
d0d6b7c5 JB |
354 | #ifdef PTY_ITERATION |
355 | PTY_ITERATION | |
356 | #else | |
357 | for (c = FIRST_PTY_LETTER; c <= 'z'; c++) | |
358 | for (i = 0; i < 16; i++) | |
359 | #endif | |
360 | { | |
361 | #ifdef PTY_NAME_SPRINTF | |
362 | PTY_NAME_SPRINTF | |
d0d6b7c5 JB |
363 | #else |
364 | sprintf (pty_name, "/dev/pty%c%x", c, i); | |
d0d6b7c5 JB |
365 | #endif /* no PTY_NAME_SPRINTF */ |
366 | ||
4d7c105e RS |
367 | #ifdef PTY_OPEN |
368 | PTY_OPEN; | |
369 | #else /* no PTY_OPEN */ | |
32676c08 JB |
370 | #ifdef IRIS |
371 | /* Unusual IRIS code */ | |
372 | *ptyv = open ("/dev/ptc", O_RDWR | O_NDELAY, 0); | |
373 | if (fd < 0) | |
374 | return -1; | |
375 | if (fstat (fd, &stb) < 0) | |
d0d6b7c5 | 376 | return -1; |
4d7c105e | 377 | #else /* not IRIS */ |
32676c08 JB |
378 | if (stat (pty_name, &stb) < 0) |
379 | { | |
380 | failed_count++; | |
381 | if (failed_count >= 3) | |
382 | return -1; | |
383 | } | |
384 | else | |
385 | failed_count = 0; | |
d0d6b7c5 JB |
386 | #ifdef O_NONBLOCK |
387 | fd = open (pty_name, O_RDWR | O_NONBLOCK, 0); | |
388 | #else | |
389 | fd = open (pty_name, O_RDWR | O_NDELAY, 0); | |
390 | #endif | |
4d7c105e RS |
391 | #endif /* not IRIS */ |
392 | #endif /* no PTY_OPEN */ | |
d0d6b7c5 JB |
393 | |
394 | if (fd >= 0) | |
395 | { | |
396 | /* check to make certain that both sides are available | |
397 | this avoids a nasty yet stupid bug in rlogins */ | |
398 | #ifdef PTY_TTY_NAME_SPRINTF | |
399 | PTY_TTY_NAME_SPRINTF | |
d0d6b7c5 JB |
400 | #else |
401 | sprintf (pty_name, "/dev/tty%c%x", c, i); | |
d0d6b7c5 JB |
402 | #endif /* no PTY_TTY_NAME_SPRINTF */ |
403 | #ifndef UNIPLUS | |
404 | if (access (pty_name, 6) != 0) | |
405 | { | |
406 | close (fd); | |
fad97cbe | 407 | #if !defined(IRIS) && !defined(__sgi) |
d0d6b7c5 JB |
408 | continue; |
409 | #else | |
410 | return -1; | |
411 | #endif /* IRIS */ | |
412 | } | |
413 | #endif /* not UNIPLUS */ | |
414 | setup_pty (fd); | |
415 | return fd; | |
416 | } | |
417 | } | |
418 | return -1; | |
419 | } | |
420 | #endif /* HAVE_PTYS */ | |
421 | \f | |
422 | Lisp_Object | |
423 | make_process (name) | |
424 | Lisp_Object name; | |
425 | { | |
426 | register Lisp_Object val, tem, name1; | |
427 | register struct Lisp_Process *p; | |
428 | char suffix[10]; | |
429 | register int i; | |
430 | ||
431 | /* size of process structure includes the vector header, | |
432 | so deduct for that. But struct Lisp_Vector includes the first | |
433 | element, thus deducts too much, so add it back. */ | |
434 | val = Fmake_vector (make_number ((sizeof (struct Lisp_Process) | |
435 | - sizeof (struct Lisp_Vector) | |
436 | + sizeof (Lisp_Object)) | |
437 | / sizeof (Lisp_Object)), | |
438 | Qnil); | |
439 | XSETTYPE (val, Lisp_Process); | |
440 | ||
441 | p = XPROCESS (val); | |
a9f2c884 RS |
442 | XSET (p->infd, Lisp_Int, -1); |
443 | XSET (p->outfd, Lisp_Int, -1); | |
d0d6b7c5 JB |
444 | XFASTINT (p->pid) = 0; |
445 | XFASTINT (p->tick) = 0; | |
446 | XFASTINT (p->update_tick) = 0; | |
447 | p->raw_status_low = Qnil; | |
448 | p->raw_status_high = Qnil; | |
449 | p->status = Qrun; | |
450 | p->mark = Fmake_marker (); | |
451 | ||
452 | /* If name is already in use, modify it until it is unused. */ | |
453 | ||
454 | name1 = name; | |
455 | for (i = 1; ; i++) | |
456 | { | |
457 | tem = Fget_process (name1); | |
458 | if (NILP (tem)) break; | |
459 | sprintf (suffix, "<%d>", i); | |
460 | name1 = concat2 (name, build_string (suffix)); | |
461 | } | |
462 | name = name1; | |
463 | p->name = name; | |
464 | Vprocess_alist = Fcons (Fcons (name, val), Vprocess_alist); | |
465 | return val; | |
466 | } | |
467 | ||
468 | remove_process (proc) | |
469 | register Lisp_Object proc; | |
470 | { | |
471 | register Lisp_Object pair; | |
472 | ||
473 | pair = Frassq (proc, Vprocess_alist); | |
474 | Vprocess_alist = Fdelq (pair, Vprocess_alist); | |
475 | Fset_marker (XPROCESS (proc)->mark, Qnil, Qnil); | |
476 | ||
477 | deactivate_process (proc); | |
478 | } | |
479 | \f | |
480 | DEFUN ("processp", Fprocessp, Sprocessp, 1, 1, 0, | |
481 | "Return t if OBJECT is a process.") | |
482 | (obj) | |
483 | Lisp_Object obj; | |
484 | { | |
485 | return XTYPE (obj) == Lisp_Process ? Qt : Qnil; | |
486 | } | |
487 | ||
488 | DEFUN ("get-process", Fget_process, Sget_process, 1, 1, 0, | |
489 | "Return the process named NAME, or nil if there is none.") | |
490 | (name) | |
491 | register Lisp_Object name; | |
492 | { | |
493 | if (XTYPE (name) == Lisp_Process) | |
494 | return name; | |
495 | CHECK_STRING (name, 0); | |
496 | return Fcdr (Fassoc (name, Vprocess_alist)); | |
497 | } | |
498 | ||
499 | DEFUN ("get-buffer-process", Fget_buffer_process, Sget_buffer_process, 1, 1, 0, | |
500 | "Return the (or, a) process associated with BUFFER.\n\ | |
501 | BUFFER may be a buffer or the name of one.") | |
502 | (name) | |
503 | register Lisp_Object name; | |
504 | { | |
505 | register Lisp_Object buf, tail, proc; | |
506 | ||
507 | if (NILP (name)) return Qnil; | |
508 | buf = Fget_buffer (name); | |
509 | if (NILP (buf)) return Qnil; | |
510 | ||
511 | for (tail = Vprocess_alist; !NILP (tail); tail = Fcdr (tail)) | |
512 | { | |
513 | proc = Fcdr (Fcar (tail)); | |
514 | if (XTYPE (proc) == Lisp_Process && EQ (XPROCESS (proc)->buffer, buf)) | |
515 | return proc; | |
516 | } | |
517 | return Qnil; | |
518 | } | |
519 | ||
ebb9e16f JB |
520 | /* This is how commands for the user decode process arguments. It |
521 | accepts a process, a process name, a buffer, a buffer name, or nil. | |
522 | Buffers denote the first process in the buffer, and nil denotes the | |
523 | current buffer. */ | |
d0d6b7c5 | 524 | |
77b221b1 | 525 | static Lisp_Object |
d0d6b7c5 JB |
526 | get_process (name) |
527 | register Lisp_Object name; | |
528 | { | |
529 | register Lisp_Object proc; | |
530 | if (NILP (name)) | |
531 | proc = Fget_buffer_process (Fcurrent_buffer ()); | |
532 | else | |
533 | { | |
534 | proc = Fget_process (name); | |
535 | if (NILP (proc)) | |
536 | proc = Fget_buffer_process (Fget_buffer (name)); | |
537 | } | |
538 | ||
539 | if (!NILP (proc)) | |
540 | return proc; | |
541 | ||
542 | if (NILP (name)) | |
543 | error ("Current buffer has no process"); | |
544 | else | |
545 | error ("Process %s does not exist", XSTRING (name)->data); | |
546 | /* NOTREACHED */ | |
547 | } | |
548 | ||
549 | DEFUN ("delete-process", Fdelete_process, Sdelete_process, 1, 1, 0, | |
550 | "Delete PROCESS: kill it and forget about it immediately.\n\ | |
ebb9e16f JB |
551 | PROCESS may be a process, a buffer, the name of a process or buffer, or\n\ |
552 | nil, indicating the current buffer's process.") | |
d0d6b7c5 JB |
553 | (proc) |
554 | register Lisp_Object proc; | |
555 | { | |
556 | proc = get_process (proc); | |
557 | XPROCESS (proc)->raw_status_low = Qnil; | |
558 | XPROCESS (proc)->raw_status_high = Qnil; | |
559 | if (NETCONN_P (proc)) | |
560 | { | |
561 | XPROCESS (proc)->status = Fcons (Qexit, Fcons (make_number (0), Qnil)); | |
562 | XSETINT (XPROCESS (proc)->tick, ++process_tick); | |
563 | } | |
6c955bcb | 564 | else if (XINT (XPROCESS (proc)->infd) >= 0) |
d0d6b7c5 JB |
565 | { |
566 | Fkill_process (proc, Qnil); | |
567 | /* Do this now, since remove_process will make sigchld_handler do nothing. */ | |
568 | XPROCESS (proc)->status | |
569 | = Fcons (Qsignal, Fcons (make_number (SIGKILL), Qnil)); | |
570 | XSETINT (XPROCESS (proc)->tick, ++process_tick); | |
571 | status_notify (); | |
572 | } | |
573 | remove_process (proc); | |
574 | return Qnil; | |
575 | } | |
576 | \f | |
577 | DEFUN ("process-status", Fprocess_status, Sprocess_status, 1, 1, 0, | |
578 | "Return the status of PROCESS: a symbol, one of these:\n\ | |
579 | run -- for a process that is running.\n\ | |
580 | stop -- for a process stopped but continuable.\n\ | |
581 | exit -- for a process that has exited.\n\ | |
582 | signal -- for a process that has got a fatal signal.\n\ | |
583 | open -- for a network stream connection that is open.\n\ | |
584 | closed -- for a network stream connection that is closed.\n\ | |
ebb9e16f JB |
585 | nil -- if arg is a process name and no such process exists.\n\ |
586 | PROCESS may be a process, a buffer, the name of a process or buffer, or\n\ | |
587 | nil, indicating the current buffer's process.") | |
d0d6b7c5 JB |
588 | (proc) |
589 | register Lisp_Object proc; | |
590 | { | |
591 | register struct Lisp_Process *p; | |
592 | register Lisp_Object status; | |
99e3d726 | 593 | proc = get_process (proc); |
d0d6b7c5 JB |
594 | if (NILP (proc)) |
595 | return proc; | |
596 | p = XPROCESS (proc); | |
597 | if (!NILP (p->raw_status_low)) | |
598 | update_status (p); | |
599 | status = p->status; | |
600 | if (XTYPE (status) == Lisp_Cons) | |
601 | status = XCONS (status)->car; | |
602 | if (NETCONN_P (proc)) | |
603 | { | |
604 | if (EQ (status, Qrun)) | |
605 | status = Qopen; | |
606 | else if (EQ (status, Qexit)) | |
607 | status = Qclosed; | |
608 | } | |
609 | return status; | |
610 | } | |
611 | ||
612 | DEFUN ("process-exit-status", Fprocess_exit_status, Sprocess_exit_status, | |
613 | 1, 1, 0, | |
614 | "Return the exit status of PROCESS or the signal number that killed it.\n\ | |
615 | If PROCESS has not yet exited or died, return 0.") | |
616 | (proc) | |
617 | register Lisp_Object proc; | |
618 | { | |
619 | CHECK_PROCESS (proc, 0); | |
620 | if (!NILP (XPROCESS (proc)->raw_status_low)) | |
621 | update_status (XPROCESS (proc)); | |
622 | if (XTYPE (XPROCESS (proc)->status) == Lisp_Cons) | |
623 | return XCONS (XCONS (XPROCESS (proc)->status)->cdr)->car; | |
624 | return make_number (0); | |
625 | } | |
626 | ||
627 | DEFUN ("process-id", Fprocess_id, Sprocess_id, 1, 1, 0, | |
628 | "Return the process id of PROCESS.\n\ | |
629 | This is the pid of the Unix process which PROCESS uses or talks to.\n\ | |
630 | For a network connection, this value is nil.") | |
631 | (proc) | |
632 | register Lisp_Object proc; | |
633 | { | |
634 | CHECK_PROCESS (proc, 0); | |
635 | return XPROCESS (proc)->pid; | |
636 | } | |
637 | ||
638 | DEFUN ("process-name", Fprocess_name, Sprocess_name, 1, 1, 0, | |
639 | "Return the name of PROCESS, as a string.\n\ | |
640 | This is the name of the program invoked in PROCESS,\n\ | |
641 | possibly modified to make it unique among process names.") | |
642 | (proc) | |
643 | register Lisp_Object proc; | |
644 | { | |
645 | CHECK_PROCESS (proc, 0); | |
646 | return XPROCESS (proc)->name; | |
647 | } | |
648 | ||
649 | DEFUN ("process-command", Fprocess_command, Sprocess_command, 1, 1, 0, | |
650 | "Return the command that was executed to start PROCESS.\n\ | |
651 | This is a list of strings, the first string being the program executed\n\ | |
652 | and the rest of the strings being the arguments given to it.\n\ | |
653 | For a non-child channel, this is nil.") | |
654 | (proc) | |
655 | register Lisp_Object proc; | |
656 | { | |
657 | CHECK_PROCESS (proc, 0); | |
658 | return XPROCESS (proc)->command; | |
659 | } | |
660 | ||
661 | DEFUN ("set-process-buffer", Fset_process_buffer, Sset_process_buffer, | |
662 | 2, 2, 0, | |
663 | "Set buffer associated with PROCESS to BUFFER (a buffer, or nil).") | |
664 | (proc, buffer) | |
665 | register Lisp_Object proc, buffer; | |
666 | { | |
667 | CHECK_PROCESS (proc, 0); | |
668 | if (!NILP (buffer)) | |
669 | CHECK_BUFFER (buffer, 1); | |
670 | XPROCESS (proc)->buffer = buffer; | |
671 | return buffer; | |
672 | } | |
673 | ||
674 | DEFUN ("process-buffer", Fprocess_buffer, Sprocess_buffer, | |
675 | 1, 1, 0, | |
676 | "Return the buffer PROCESS is associated with.\n\ | |
677 | Output from PROCESS is inserted in this buffer\n\ | |
678 | unless PROCESS has a filter.") | |
679 | (proc) | |
680 | register Lisp_Object proc; | |
681 | { | |
682 | CHECK_PROCESS (proc, 0); | |
683 | return XPROCESS (proc)->buffer; | |
684 | } | |
685 | ||
686 | DEFUN ("process-mark", Fprocess_mark, Sprocess_mark, | |
687 | 1, 1, 0, | |
688 | "Return the marker for the end of the last output from PROCESS.") | |
689 | (proc) | |
690 | register Lisp_Object proc; | |
691 | { | |
692 | CHECK_PROCESS (proc, 0); | |
693 | return XPROCESS (proc)->mark; | |
694 | } | |
695 | ||
696 | DEFUN ("set-process-filter", Fset_process_filter, Sset_process_filter, | |
697 | 2, 2, 0, | |
698 | "Give PROCESS the filter function FILTER; nil means no filter.\n\ | |
20ddfff7 | 699 | t means stop accepting output from the process.\n\ |
d0d6b7c5 JB |
700 | When a process has a filter, each time it does output\n\ |
701 | the entire string of output is passed to the filter.\n\ | |
702 | The filter gets two arguments: the process and the string of output.\n\ | |
703 | If the process has a filter, its buffer is not used for output.") | |
704 | (proc, filter) | |
705 | register Lisp_Object proc, filter; | |
706 | { | |
707 | CHECK_PROCESS (proc, 0); | |
20ddfff7 | 708 | if (EQ (filter, Qt)) |
a9f2c884 | 709 | FD_CLR (XINT (XPROCESS (proc)->infd), &input_wait_mask); |
20ddfff7 | 710 | else if (EQ (XPROCESS (proc)->filter, Qt)) |
a9f2c884 | 711 | FD_SET (XINT (XPROCESS (proc)->infd), &input_wait_mask); |
d0d6b7c5 JB |
712 | XPROCESS (proc)->filter = filter; |
713 | return filter; | |
714 | } | |
715 | ||
716 | DEFUN ("process-filter", Fprocess_filter, Sprocess_filter, | |
717 | 1, 1, 0, | |
718 | "Returns the filter function of PROCESS; nil if none.\n\ | |
719 | See `set-process-filter' for more info on filter functions.") | |
720 | (proc) | |
721 | register Lisp_Object proc; | |
722 | { | |
723 | CHECK_PROCESS (proc, 0); | |
724 | return XPROCESS (proc)->filter; | |
725 | } | |
726 | ||
727 | DEFUN ("set-process-sentinel", Fset_process_sentinel, Sset_process_sentinel, | |
728 | 2, 2, 0, | |
729 | "Give PROCESS the sentinel SENTINEL; nil for none.\n\ | |
730 | The sentinel is called as a function when the process changes state.\n\ | |
731 | It gets two arguments: the process, and a string describing the change.") | |
732 | (proc, sentinel) | |
733 | register Lisp_Object proc, sentinel; | |
734 | { | |
735 | CHECK_PROCESS (proc, 0); | |
736 | XPROCESS (proc)->sentinel = sentinel; | |
737 | return sentinel; | |
738 | } | |
739 | ||
740 | DEFUN ("process-sentinel", Fprocess_sentinel, Sprocess_sentinel, | |
741 | 1, 1, 0, | |
742 | "Return the sentinel of PROCESS; nil if none.\n\ | |
743 | See `set-process-sentinel' for more info on sentinels.") | |
744 | (proc) | |
745 | register Lisp_Object proc; | |
746 | { | |
747 | CHECK_PROCESS (proc, 0); | |
748 | return XPROCESS (proc)->sentinel; | |
749 | } | |
750 | ||
751 | DEFUN ("process-kill-without-query", Fprocess_kill_without_query, | |
752 | Sprocess_kill_without_query, 1, 2, 0, | |
753 | "Say no query needed if PROCESS is running when Emacs is exited.\n\ | |
754 | Optional second argument if non-nill says to require a query.\n\ | |
755 | Value is t if a query was formerly required.") | |
756 | (proc, value) | |
757 | register Lisp_Object proc, value; | |
758 | { | |
759 | Lisp_Object tem; | |
760 | ||
761 | CHECK_PROCESS (proc, 0); | |
762 | tem = XPROCESS (proc)->kill_without_query; | |
763 | XPROCESS (proc)->kill_without_query = Fnull (value); | |
764 | ||
765 | return Fnull (tem); | |
766 | } | |
312c9964 RS |
767 | |
768 | #if 0 /* Turned off because we don't currently record this info | |
769 | in the process. Perhaps add it. */ | |
770 | DEFUN ("process-connection", Fprocess_connection, Sprocess_connection, 1, 1, 0, | |
771 | "Return the connection type of `PROCESS'.\n\ | |
772 | The value is `nil' for a pipe,\n\ | |
773 | `t' or `pty' for a pty, or `stream' for a socket connection.") | |
774 | (process) | |
775 | Lisp_Object process; | |
776 | { | |
777 | return XPROCESS (process)->type; | |
778 | } | |
779 | #endif | |
d0d6b7c5 JB |
780 | \f |
781 | Lisp_Object | |
782 | list_processes_1 () | |
783 | { | |
784 | register Lisp_Object tail, tem; | |
785 | Lisp_Object proc, minspace, tem1; | |
786 | register struct buffer *old = current_buffer; | |
787 | register struct Lisp_Process *p; | |
788 | register int state; | |
789 | char tembuf[80]; | |
790 | ||
791 | XFASTINT (minspace) = 1; | |
792 | ||
793 | set_buffer_internal (XBUFFER (Vstandard_output)); | |
794 | Fbuffer_disable_undo (Vstandard_output); | |
795 | ||
796 | current_buffer->truncate_lines = Qt; | |
797 | ||
798 | write_string ("\ | |
799 | Proc Status Buffer Command\n\ | |
800 | ---- ------ ------ -------\n", -1); | |
801 | ||
802 | for (tail = Vprocess_alist; !NILP (tail); tail = Fcdr (tail)) | |
803 | { | |
804 | Lisp_Object symbol; | |
805 | ||
806 | proc = Fcdr (Fcar (tail)); | |
807 | p = XPROCESS (proc); | |
808 | if (NILP (p->childp)) | |
809 | continue; | |
810 | ||
811 | Finsert (1, &p->name); | |
812 | Findent_to (make_number (13), minspace); | |
813 | ||
814 | if (!NILP (p->raw_status_low)) | |
815 | update_status (p); | |
816 | symbol = p->status; | |
817 | if (XTYPE (p->status) == Lisp_Cons) | |
818 | symbol = XCONS (p->status)->car; | |
819 | ||
820 | ||
821 | if (EQ (symbol, Qsignal)) | |
822 | { | |
823 | Lisp_Object tem; | |
824 | tem = Fcar (Fcdr (p->status)); | |
825 | #ifdef VMS | |
826 | if (XINT (tem) < NSIG) | |
b0310da4 | 827 | write_string (sys_errlist [XINT (tem)], -1); |
d0d6b7c5 JB |
828 | else |
829 | #endif | |
830 | Fprinc (symbol, Qnil); | |
831 | } | |
832 | else if (NETCONN_P (proc)) | |
833 | { | |
834 | if (EQ (symbol, Qrun)) | |
835 | write_string ("open", -1); | |
836 | else if (EQ (symbol, Qexit)) | |
837 | write_string ("closed", -1); | |
838 | else | |
839 | Fprinc (symbol, Qnil); | |
840 | } | |
841 | else | |
842 | Fprinc (symbol, Qnil); | |
843 | ||
844 | if (EQ (symbol, Qexit)) | |
845 | { | |
846 | Lisp_Object tem; | |
847 | tem = Fcar (Fcdr (p->status)); | |
848 | if (XFASTINT (tem)) | |
849 | { | |
850 | sprintf (tembuf, " %d", XFASTINT (tem)); | |
851 | write_string (tembuf, -1); | |
852 | } | |
853 | } | |
854 | ||
855 | if (EQ (symbol, Qsignal) || EQ (symbol, Qexit)) | |
856 | remove_process (proc); | |
857 | ||
858 | Findent_to (make_number (22), minspace); | |
859 | if (NILP (p->buffer)) | |
860 | insert_string ("(none)"); | |
861 | else if (NILP (XBUFFER (p->buffer)->name)) | |
862 | insert_string ("(Killed)"); | |
863 | else | |
864 | Finsert (1, &XBUFFER (p->buffer)->name); | |
865 | ||
866 | Findent_to (make_number (37), minspace); | |
867 | ||
868 | if (NETCONN_P (proc)) | |
869 | { | |
870 | sprintf (tembuf, "(network stream connection to %s)\n", | |
871 | XSTRING (p->childp)->data); | |
872 | insert_string (tembuf); | |
873 | } | |
874 | else | |
875 | { | |
876 | tem = p->command; | |
877 | while (1) | |
878 | { | |
879 | tem1 = Fcar (tem); | |
880 | Finsert (1, &tem1); | |
881 | tem = Fcdr (tem); | |
882 | if (NILP (tem)) | |
883 | break; | |
884 | insert_string (" "); | |
885 | } | |
886 | insert_string ("\n"); | |
887 | } | |
888 | } | |
889 | return Qnil; | |
890 | } | |
891 | ||
892 | DEFUN ("list-processes", Flist_processes, Slist_processes, 0, 0, "", | |
893 | "Display a list of all processes.\n\ | |
894 | \(Any processes listed as Exited or Signaled are actually eliminated\n\ | |
895 | after the listing is made.)") | |
896 | () | |
897 | { | |
898 | internal_with_output_to_temp_buffer ("*Process List*", | |
899 | list_processes_1, Qnil); | |
900 | return Qnil; | |
901 | } | |
902 | ||
903 | DEFUN ("process-list", Fprocess_list, Sprocess_list, 0, 0, 0, | |
904 | "Return a list of all processes.") | |
905 | () | |
906 | { | |
907 | return Fmapcar (Qcdr, Vprocess_alist); | |
908 | } | |
909 | \f | |
b0310da4 JB |
910 | /* Starting asynchronous inferior processes. */ |
911 | ||
912 | static Lisp_Object start_process_unwind (); | |
913 | ||
d0d6b7c5 JB |
914 | DEFUN ("start-process", Fstart_process, Sstart_process, 3, MANY, 0, |
915 | "Start a program in a subprocess. Return the process object for it.\n\ | |
916 | Args are NAME BUFFER PROGRAM &rest PROGRAM-ARGS\n\ | |
917 | NAME is name for process. It is modified if necessary to make it unique.\n\ | |
918 | BUFFER is the buffer or (buffer-name) to associate with the process.\n\ | |
919 | Process output goes at end of that buffer, unless you specify\n\ | |
920 | an output stream or filter function to handle the output.\n\ | |
921 | BUFFER may be also nil, meaning that this process is not associated\n\ | |
922 | with any buffer\n\ | |
923 | Third arg is program file name. It is searched for as in the shell.\n\ | |
924 | Remaining arguments are strings to give program as arguments.") | |
925 | (nargs, args) | |
926 | int nargs; | |
927 | register Lisp_Object *args; | |
928 | { | |
1e30af70 | 929 | Lisp_Object buffer, name, program, proc, current_dir, tem; |
d0d6b7c5 JB |
930 | #ifdef VMS |
931 | register unsigned char *new_argv; | |
932 | int len; | |
933 | #else | |
934 | register unsigned char **new_argv; | |
935 | #endif | |
936 | register int i; | |
b0310da4 | 937 | int count = specpdl_ptr - specpdl; |
d0d6b7c5 JB |
938 | |
939 | buffer = args[1]; | |
940 | if (!NILP (buffer)) | |
941 | buffer = Fget_buffer_create (buffer); | |
942 | ||
1e30af70 JB |
943 | /* Make sure that the child will be able to chdir to the current |
944 | buffer's current directory, or its unhandled equivalent. We | |
945 | can't just have the child check for an error when it does the | |
946 | chdir, since it's in a vfork. | |
947 | ||
948 | We have to GCPRO around this because Fexpand_file_name and | |
949 | Funhandled_file_name_directory might call a file name handling | |
950 | function. The argument list is protected by the caller, so all | |
951 | we really have to worry about is buffer. */ | |
952 | { | |
953 | struct gcpro gcpro1, gcpro2; | |
954 | ||
955 | current_dir = current_buffer->directory; | |
956 | ||
957 | GCPRO2 (buffer, current_dir); | |
958 | ||
959 | current_dir = | |
960 | expand_and_dir_to_file | |
82df4891 | 961 | (Funhandled_file_name_directory (current_dir), Qnil); |
1e30af70 JB |
962 | if (NILP (Ffile_accessible_directory_p (current_dir))) |
963 | report_file_error ("Setting current directory", | |
964 | Fcons (current_buffer->directory, Qnil)); | |
965 | ||
966 | UNGCPRO; | |
967 | } | |
968 | ||
d0d6b7c5 JB |
969 | name = args[0]; |
970 | CHECK_STRING (name, 0); | |
971 | ||
972 | program = args[2]; | |
973 | ||
974 | CHECK_STRING (program, 2); | |
975 | ||
976 | #ifdef VMS | |
977 | /* Make a one member argv with all args concatenated | |
978 | together separated by a blank. */ | |
979 | len = XSTRING (program)->size + 2; | |
980 | for (i = 3; i < nargs; i++) | |
981 | { | |
982 | tem = args[i]; | |
983 | CHECK_STRING (tem, i); | |
984 | len += XSTRING (tem)->size + 1; /* count the blank */ | |
985 | } | |
986 | new_argv = (unsigned char *) alloca (len); | |
987 | strcpy (new_argv, XSTRING (program)->data); | |
988 | for (i = 3; i < nargs; i++) | |
989 | { | |
990 | tem = args[i]; | |
991 | CHECK_STRING (tem, i); | |
992 | strcat (new_argv, " "); | |
993 | strcat (new_argv, XSTRING (tem)->data); | |
994 | } | |
b0310da4 JB |
995 | /* Need to add code here to check for program existence on VMS */ |
996 | ||
d0d6b7c5 JB |
997 | #else /* not VMS */ |
998 | new_argv = (unsigned char **) alloca ((nargs - 1) * sizeof (char *)); | |
999 | ||
1000 | for (i = 3; i < nargs; i++) | |
1001 | { | |
1002 | tem = args[i]; | |
1003 | CHECK_STRING (tem, i); | |
1004 | new_argv[i - 2] = XSTRING (tem)->data; | |
1005 | } | |
1006 | new_argv[i - 2] = 0; | |
1007 | new_argv[0] = XSTRING (program)->data; | |
1008 | ||
1009 | /* If program file name is not absolute, search our path for it */ | |
1010 | if (new_argv[0][0] != '/') | |
1011 | { | |
1012 | tem = Qnil; | |
5437e9f9 | 1013 | openp (Vexec_path, program, EXEC_SUFFIXES, &tem, 1); |
d0d6b7c5 JB |
1014 | if (NILP (tem)) |
1015 | report_file_error ("Searching for program", Fcons (program, Qnil)); | |
1016 | new_argv[0] = XSTRING (tem)->data; | |
1017 | } | |
1018 | #endif /* not VMS */ | |
1019 | ||
1020 | proc = make_process (name); | |
b0310da4 JB |
1021 | /* If an error occurs and we can't start the process, we want to |
1022 | remove it from the process list. This means that each error | |
1023 | check in create_process doesn't need to call remove_process | |
1024 | itself; it's all taken care of here. */ | |
1025 | record_unwind_protect (start_process_unwind, proc); | |
d0d6b7c5 JB |
1026 | |
1027 | XPROCESS (proc)->childp = Qt; | |
1028 | XPROCESS (proc)->command_channel_p = Qnil; | |
1029 | XPROCESS (proc)->buffer = buffer; | |
1030 | XPROCESS (proc)->sentinel = Qnil; | |
1031 | XPROCESS (proc)->filter = Qnil; | |
1032 | XPROCESS (proc)->command = Flist (nargs - 2, args + 2); | |
1033 | ||
1e30af70 | 1034 | create_process (proc, new_argv, current_dir); |
d0d6b7c5 | 1035 | |
b0310da4 | 1036 | return unbind_to (count, proc); |
d0d6b7c5 JB |
1037 | } |
1038 | ||
b0310da4 JB |
1039 | /* This function is the unwind_protect form for Fstart_process. If |
1040 | PROC doesn't have its pid set, then we know someone has signalled | |
1041 | an error and the process wasn't started successfully, so we should | |
1042 | remove it from the process list. */ | |
1043 | static Lisp_Object | |
1044 | start_process_unwind (proc) | |
1045 | Lisp_Object proc; | |
1046 | { | |
1047 | if (XTYPE (proc) != Lisp_Process) | |
1048 | abort (); | |
1049 | ||
1050 | /* Was PROC started successfully? */ | |
188d6c4e | 1051 | if (XINT (XPROCESS (proc)->pid) <= 0) |
b0310da4 JB |
1052 | remove_process (proc); |
1053 | ||
1054 | return Qnil; | |
1055 | } | |
1056 | ||
1057 | ||
d0d6b7c5 JB |
1058 | SIGTYPE |
1059 | create_process_1 (signo) | |
1060 | int signo; | |
1061 | { | |
1062 | #ifdef USG | |
1063 | /* USG systems forget handlers when they are used; | |
1064 | must reestablish each time */ | |
1065 | signal (signo, create_process_1); | |
1066 | #endif /* USG */ | |
1067 | } | |
1068 | ||
1069 | #if 0 /* This doesn't work; see the note before sigchld_handler. */ | |
1070 | #ifdef USG | |
1071 | #ifdef SIGCHLD | |
1072 | /* Mimic blocking of signals on system V, which doesn't really have it. */ | |
1073 | ||
1074 | /* Nonzero means we got a SIGCHLD when it was supposed to be blocked. */ | |
1075 | int sigchld_deferred; | |
1076 | ||
1077 | SIGTYPE | |
1078 | create_process_sigchld () | |
1079 | { | |
1080 | signal (SIGCHLD, create_process_sigchld); | |
1081 | ||
1082 | sigchld_deferred = 1; | |
1083 | } | |
1084 | #endif | |
1085 | #endif | |
1086 | #endif | |
1087 | ||
1088 | #ifndef VMS /* VMS version of this function is in vmsproc.c. */ | |
1e30af70 | 1089 | create_process (process, new_argv, current_dir) |
d0d6b7c5 JB |
1090 | Lisp_Object process; |
1091 | char **new_argv; | |
1e30af70 | 1092 | Lisp_Object current_dir; |
d0d6b7c5 JB |
1093 | { |
1094 | int pid, inchannel, outchannel, forkin, forkout; | |
1095 | int sv[2]; | |
1096 | #ifdef SIGCHLD | |
1097 | SIGTYPE (*sigchld)(); | |
1098 | #endif | |
1099 | int pty_flag = 0; | |
d0d6b7c5 JB |
1100 | extern char **environ; |
1101 | ||
d0d6b7c5 JB |
1102 | inchannel = outchannel = -1; |
1103 | ||
1104 | #ifdef HAVE_PTYS | |
1105 | if (EQ (Vprocess_connection_type, Qt)) | |
1106 | outchannel = inchannel = allocate_pty (); | |
1107 | ||
d0d6b7c5 JB |
1108 | if (inchannel >= 0) |
1109 | { | |
1110 | #ifndef USG | |
1111 | /* On USG systems it does not work to open the pty's tty here | |
1112 | and then close and reopen it in the child. */ | |
1113 | #ifdef O_NOCTTY | |
1114 | /* Don't let this terminal become our controlling terminal | |
1115 | (in case we don't have one). */ | |
1116 | forkout = forkin = open (pty_name, O_RDWR | O_NOCTTY, 0); | |
1117 | #else | |
1118 | forkout = forkin = open (pty_name, O_RDWR, 0); | |
1119 | #endif | |
1120 | if (forkin < 0) | |
1121 | report_file_error ("Opening pty", Qnil); | |
1122 | #else | |
1123 | forkin = forkout = -1; | |
1124 | #endif /* not USG */ | |
1125 | pty_flag = 1; | |
1126 | } | |
1127 | else | |
1128 | #endif /* HAVE_PTYS */ | |
1129 | #ifdef SKTPAIR | |
1130 | { | |
1131 | if (socketpair (AF_UNIX, SOCK_STREAM, 0, sv) < 0) | |
1132 | report_file_error ("Opening socketpair", Qnil); | |
1133 | outchannel = inchannel = sv[0]; | |
1134 | forkout = forkin = sv[1]; | |
1135 | } | |
1136 | #else /* not SKTPAIR */ | |
1137 | { | |
1138 | pipe (sv); | |
1139 | inchannel = sv[0]; | |
1140 | forkout = sv[1]; | |
1141 | pipe (sv); | |
1142 | outchannel = sv[1]; | |
1143 | forkin = sv[0]; | |
1144 | } | |
1145 | #endif /* not SKTPAIR */ | |
1146 | ||
1147 | #if 0 | |
1148 | /* Replaced by close_process_descs */ | |
1149 | set_exclusive_use (inchannel); | |
1150 | set_exclusive_use (outchannel); | |
1151 | #endif | |
1152 | ||
1153 | /* Stride people say it's a mystery why this is needed | |
1154 | as well as the O_NDELAY, but that it fails without this. */ | |
1155 | #if defined (STRIDE) || (defined (pfa) && defined (HAVE_PTYS)) | |
1156 | { | |
1157 | int one = 1; | |
1158 | ioctl (inchannel, FIONBIO, &one); | |
1159 | } | |
1160 | #endif | |
1161 | ||
1162 | #ifdef O_NONBLOCK | |
1163 | fcntl (inchannel, F_SETFL, O_NONBLOCK); | |
1164 | #else | |
1165 | #ifdef O_NDELAY | |
1166 | fcntl (inchannel, F_SETFL, O_NDELAY); | |
1167 | #endif | |
1168 | #endif | |
1169 | ||
1170 | /* Record this as an active process, with its channels. | |
1171 | As a result, child_setup will close Emacs's side of the pipes. */ | |
1172 | chan_process[inchannel] = process; | |
a9f2c884 RS |
1173 | XSET (XPROCESS (process)->infd, Lisp_Int, inchannel); |
1174 | XSET (XPROCESS (process)->outfd, Lisp_Int, outchannel); | |
d0d6b7c5 JB |
1175 | /* Record the tty descriptor used in the subprocess. */ |
1176 | if (forkin < 0) | |
1177 | XPROCESS (process)->subtty = Qnil; | |
1178 | else | |
1179 | XFASTINT (XPROCESS (process)->subtty) = forkin; | |
1180 | XPROCESS (process)->pty_flag = (pty_flag ? Qt : Qnil); | |
1181 | XPROCESS (process)->status = Qrun; | |
1182 | ||
1183 | /* Delay interrupts until we have a chance to store | |
1184 | the new fork's pid in its process structure */ | |
1185 | #ifdef SIGCHLD | |
1186 | #ifdef BSD4_1 | |
1187 | sighold (SIGCHLD); | |
1188 | #else /* not BSD4_1 */ | |
1189 | #if defined (BSD) || defined (UNIPLUS) || defined (HPUX) | |
1190 | sigsetmask (sigmask (SIGCHLD)); | |
1191 | #else /* ordinary USG */ | |
1192 | #if 0 | |
1193 | sigchld_deferred = 0; | |
1194 | sigchld = signal (SIGCHLD, create_process_sigchld); | |
1195 | #endif | |
1196 | #endif /* ordinary USG */ | |
1197 | #endif /* not BSD4_1 */ | |
1198 | #endif /* SIGCHLD */ | |
1199 | ||
1200 | /* Until we store the proper pid, enable sigchld_handler | |
1201 | to recognize an unknown pid as standing for this process. | |
1202 | It is very important not to let this `marker' value stay | |
1203 | in the table after this function has returned; if it does | |
1204 | it might cause call-process to hang and subsequent asynchronous | |
1205 | processes to get their return values scrambled. */ | |
1206 | XSETINT (XPROCESS (process)->pid, -1); | |
1207 | ||
1208 | { | |
1209 | /* child_setup must clobber environ on systems with true vfork. | |
1210 | Protect it from permanent change. */ | |
1211 | char **save_environ = environ; | |
1212 | ||
1213 | pid = vfork (); | |
1214 | if (pid == 0) | |
1215 | { | |
1216 | int xforkin = forkin; | |
1217 | int xforkout = forkout; | |
1218 | ||
1219 | #if 0 /* This was probably a mistake--it duplicates code later on, | |
1220 | but fails to handle all the cases. */ | |
1221 | /* Make sure SIGCHLD is not blocked in the child. */ | |
1222 | sigsetmask (SIGEMPTYMASK); | |
1223 | #endif | |
1224 | ||
1225 | /* Make the pty be the controlling terminal of the process. */ | |
1226 | #ifdef HAVE_PTYS | |
1227 | /* First, disconnect its current controlling terminal. */ | |
1228 | #ifdef HAVE_SETSID | |
1229 | setsid (); | |
ce4c9c90 RS |
1230 | #ifdef TIOCSCTTY |
1231 | /* Make the pty's terminal the controlling terminal. */ | |
084fd64a RS |
1232 | if (pty_flag) |
1233 | /* We ignore the return value | |
1234 | because faith@cs.unc.edu says that is necessary on Linux. */ | |
1235 | ioctl (xforkin, TIOCSCTTY, 0); | |
ce4c9c90 | 1236 | #endif |
d0d6b7c5 | 1237 | #else /* not HAVE_SETSID */ |
c14e53a4 | 1238 | #ifdef USG |
000ab717 | 1239 | /* It's very important to call setpgrp here and no time |
d0d6b7c5 JB |
1240 | afterwards. Otherwise, we lose our controlling tty which |
1241 | is set when we open the pty. */ | |
1242 | setpgrp (); | |
1243 | #endif /* USG */ | |
1244 | #endif /* not HAVE_SETSID */ | |
000ab717 RS |
1245 | #ifdef NTTYDISC |
1246 | { | |
1247 | /* Use new line discipline. */ | |
1248 | int ldisc = NTTYDISC; | |
1249 | if (ioctl (xforkin, TIOCSETD, &ldisc) < 0) | |
1250 | write (1, "create_process/TIOCSETD failed\n", 31); | |
1251 | } | |
1252 | #endif | |
d0d6b7c5 JB |
1253 | #ifdef TIOCNOTTY |
1254 | /* In 4.3BSD, the TIOCSPGRP bug has been fixed, and now you | |
1255 | can do TIOCSPGRP only to the process's controlling tty. */ | |
1256 | if (pty_flag) | |
1257 | { | |
1258 | /* I wonder: would just ioctl (0, TIOCNOTTY, 0) work here? | |
1259 | I can't test it since I don't have 4.3. */ | |
1260 | int j = open ("/dev/tty", O_RDWR, 0); | |
1261 | ioctl (j, TIOCNOTTY, 0); | |
1262 | close (j); | |
5a570e37 | 1263 | #ifndef USG |
d0d6b7c5 JB |
1264 | /* In order to get a controlling terminal on some versions |
1265 | of BSD, it is necessary to put the process in pgrp 0 | |
1266 | before it opens the terminal. */ | |
1267 | setpgrp (0, 0); | |
1268 | #endif | |
1269 | } | |
1270 | #endif /* TIOCNOTTY */ | |
1271 | ||
1272 | #if !defined (RTU) && !defined (UNIPLUS) | |
1273 | /*** There is a suggestion that this ought to be a | |
1274 | conditional on TIOCSPGRP. */ | |
1275 | /* Now close the pty (if we had it open) and reopen it. | |
1276 | This makes the pty the controlling terminal of the subprocess. */ | |
1277 | if (pty_flag) | |
1278 | { | |
99e3d726 RS |
1279 | #ifdef SET_CHILD_PTY_PGRP |
1280 | int pgrp = getpid (); | |
1281 | #endif | |
1282 | ||
d0d6b7c5 JB |
1283 | /* I wonder if close (open (pty_name, ...)) would work? */ |
1284 | if (xforkin >= 0) | |
1285 | close (xforkin); | |
1286 | xforkout = xforkin = open (pty_name, O_RDWR, 0); | |
1287 | ||
99e3d726 RS |
1288 | #ifdef SET_CHILD_PTY_PGRP |
1289 | ioctl (xforkin, TIOCSPGRP, &pgrp); | |
1290 | ioctl (xforkout, TIOCSPGRP, &pgrp); | |
1291 | #endif | |
1292 | ||
d0d6b7c5 JB |
1293 | if (xforkin < 0) |
1294 | abort (); | |
1295 | } | |
1296 | #endif /* not UNIPLUS and not RTU */ | |
1297 | #ifdef SETUP_SLAVE_PTY | |
1298 | SETUP_SLAVE_PTY; | |
1299 | #endif /* SETUP_SLAVE_PTY */ | |
1300 | #ifdef AIX | |
1301 | /* On AIX, we've disabled SIGHUP above once we start a child on a pty. | |
1302 | Now reenable it in the child, so it will die when we want it to. */ | |
1303 | if (pty_flag) | |
1304 | signal (SIGHUP, SIG_DFL); | |
1305 | #endif | |
1306 | #endif /* HAVE_PTYS */ | |
1307 | ||
1308 | #ifdef SIGCHLD | |
1309 | #ifdef BSD4_1 | |
1310 | sigrelse (SIGCHLD); | |
1311 | #else /* not BSD4_1 */ | |
1312 | #if defined (BSD) || defined (UNIPLUS) || defined (HPUX) | |
1313 | sigsetmask (SIGEMPTYMASK); | |
1314 | #else /* ordinary USG */ | |
63528b78 | 1315 | #if 0 |
d0d6b7c5 | 1316 | signal (SIGCHLD, sigchld); |
63528b78 | 1317 | #endif |
d0d6b7c5 JB |
1318 | #endif /* ordinary USG */ |
1319 | #endif /* not BSD4_1 */ | |
1320 | #endif /* SIGCHLD */ | |
1321 | ||
1322 | child_setup_tty (xforkout); | |
1323 | child_setup (xforkin, xforkout, xforkout, | |
e065a56e | 1324 | new_argv, 1, current_dir); |
d0d6b7c5 JB |
1325 | } |
1326 | environ = save_environ; | |
1327 | } | |
1328 | ||
1329 | if (pid < 0) | |
b0310da4 JB |
1330 | report_file_error ("Doing vfork", Qnil); |
1331 | ||
d0d6b7c5 JB |
1332 | XFASTINT (XPROCESS (process)->pid) = pid; |
1333 | ||
1334 | FD_SET (inchannel, &input_wait_mask); | |
1335 | ||
1336 | /* If the subfork execv fails, and it exits, | |
1337 | this close hangs. I don't know why. | |
1338 | So have an interrupt jar it loose. */ | |
1339 | stop_polling (); | |
1340 | signal (SIGALRM, create_process_1); | |
1341 | alarm (1); | |
99e3d726 RS |
1342 | XPROCESS (process)->subtty = Qnil; |
1343 | if (forkin >= 0) | |
1344 | close (forkin); | |
d0d6b7c5 JB |
1345 | alarm (0); |
1346 | start_polling (); | |
1347 | if (forkin != forkout && forkout >= 0) | |
1348 | close (forkout); | |
1349 | ||
1350 | #ifdef SIGCHLD | |
1351 | #ifdef BSD4_1 | |
1352 | sigrelse (SIGCHLD); | |
1353 | #else /* not BSD4_1 */ | |
1354 | #if defined (BSD) || defined (UNIPLUS) || defined (HPUX) | |
1355 | sigsetmask (SIGEMPTYMASK); | |
1356 | #else /* ordinary USG */ | |
1357 | #if 0 | |
1358 | signal (SIGCHLD, sigchld); | |
1359 | /* Now really handle any of these signals | |
1360 | that came in during this function. */ | |
1361 | if (sigchld_deferred) | |
1362 | kill (getpid (), SIGCHLD); | |
1363 | #endif | |
1364 | #endif /* ordinary USG */ | |
1365 | #endif /* not BSD4_1 */ | |
1366 | #endif /* SIGCHLD */ | |
1367 | } | |
1368 | #endif /* not VMS */ | |
1369 | ||
1370 | #ifdef HAVE_SOCKETS | |
1371 | ||
1372 | /* open a TCP network connection to a given HOST/SERVICE. Treated | |
1373 | exactly like a normal process when reading and writing. Only | |
1374 | differences are in status display and process deletion. A network | |
1375 | connection has no PID; you cannot signal it. All you can do is | |
1376 | deactivate and close it via delete-process */ | |
1377 | ||
1378 | DEFUN ("open-network-stream", Fopen_network_stream, Sopen_network_stream, | |
1379 | 4, 4, 0, | |
1380 | "Open a TCP connection for a service to a host.\n\ | |
1381 | Returns a subprocess-object to represent the connection.\n\ | |
1382 | Input and output work as for subprocesses; `delete-process' closes it.\n\ | |
1383 | Args are NAME BUFFER HOST SERVICE.\n\ | |
1384 | NAME is name for process. It is modified if necessary to make it unique.\n\ | |
1385 | BUFFER is the buffer (or buffer-name) to associate with the process.\n\ | |
1386 | Process output goes at end of that buffer, unless you specify\n\ | |
1387 | an output stream or filter function to handle the output.\n\ | |
1388 | BUFFER may be also nil, meaning that this process is not associated\n\ | |
1389 | with any buffer\n\ | |
1390 | Third arg is name of the host to connect to, or its IP address.\n\ | |
1391 | Fourth arg SERVICE is name of the service desired, or an integer\n\ | |
1392 | specifying a port number to connect to.") | |
1393 | (name, buffer, host, service) | |
1394 | Lisp_Object name, buffer, host, service; | |
1395 | { | |
1396 | Lisp_Object proc; | |
1397 | register int i; | |
1398 | struct sockaddr_in address; | |
1399 | struct servent *svc_info; | |
1400 | struct hostent *host_info_ptr, host_info; | |
1401 | char *(addr_list[2]); | |
79967d5e | 1402 | IN_ADDR numeric_addr; |
d0d6b7c5 JB |
1403 | int s, outch, inch; |
1404 | char errstring[80]; | |
1405 | int port; | |
1406 | struct hostent host_info_fixed; | |
1407 | struct gcpro gcpro1, gcpro2, gcpro3, gcpro4; | |
1408 | ||
1409 | GCPRO4 (name, buffer, host, service); | |
1410 | CHECK_STRING (name, 0); | |
1411 | CHECK_STRING (host, 0); | |
1412 | if (XTYPE(service) == Lisp_Int) | |
1413 | port = htons ((unsigned short) XINT (service)); | |
1414 | else | |
1415 | { | |
1416 | CHECK_STRING (service, 0); | |
1417 | svc_info = getservbyname (XSTRING (service)->data, "tcp"); | |
1418 | if (svc_info == 0) | |
1419 | error ("Unknown service \"%s\"", XSTRING (service)->data); | |
1420 | port = svc_info->s_port; | |
1421 | } | |
1422 | ||
1d2c16fa | 1423 | #ifndef TERM |
d0d6b7c5 JB |
1424 | host_info_ptr = gethostbyname (XSTRING (host)->data); |
1425 | if (host_info_ptr == 0) | |
1426 | /* Attempt to interpret host as numeric inet address */ | |
1427 | { | |
393a9679 | 1428 | numeric_addr = inet_addr ((char *) XSTRING (host)->data); |
79967d5e | 1429 | if (NUMERIC_ADDR_ERROR) |
d0d6b7c5 JB |
1430 | error ("Unknown host \"%s\"", XSTRING (host)->data); |
1431 | ||
1432 | host_info_ptr = &host_info; | |
1433 | host_info.h_name = 0; | |
1434 | host_info.h_aliases = 0; | |
1435 | host_info.h_addrtype = AF_INET; | |
39a21be6 JB |
1436 | #ifdef h_addr |
1437 | /* Older machines have only one address slot called h_addr. | |
1438 | Newer machines have h_addr_list, but #define h_addr to | |
1439 | be its first element. */ | |
1440 | host_info.h_addr_list = &(addr_list[0]); | |
1441 | #endif | |
1442 | host_info.h_addr = (char*)(&numeric_addr); | |
d0d6b7c5 JB |
1443 | addr_list[1] = 0; |
1444 | host_info.h_length = strlen (addr_list[0]); | |
1445 | } | |
1446 | ||
1447 | bzero (&address, sizeof address); | |
1448 | bcopy (host_info_ptr->h_addr, (char *) &address.sin_addr, | |
1449 | host_info_ptr->h_length); | |
1450 | address.sin_family = host_info_ptr->h_addrtype; | |
1451 | address.sin_port = port; | |
1452 | ||
1453 | s = socket (host_info_ptr->h_addrtype, SOCK_STREAM, 0); | |
1454 | if (s < 0) | |
1455 | report_file_error ("error creating socket", Fcons (name, Qnil)); | |
1456 | ||
457a9bee RS |
1457 | /* Kernel bugs (on Ultrix at least) cause lossage (not just EINTR) |
1458 | when connect is interrupted. So let's not let it get interrupted. | |
1459 | Note we do not turn off polling, because polling is only used | |
1460 | when not interrupt_input, and thus not normally used on the systems | |
1461 | which have this bug. On systems which use polling, there's no way | |
1462 | to quit if polling is turned off. */ | |
1463 | if (interrupt_input) | |
1464 | unrequest_sigio (); | |
1465 | ||
d0d6b7c5 | 1466 | loop: |
63826237 | 1467 | if (connect (s, (struct sockaddr *) &address, sizeof address) == -1) |
d0d6b7c5 JB |
1468 | { |
1469 | int xerrno = errno; | |
1470 | if (errno == EINTR) | |
1471 | goto loop; | |
1472 | close (s); | |
457a9bee RS |
1473 | |
1474 | if (interrupt_input) | |
1475 | request_sigio (); | |
1476 | ||
d0d6b7c5 JB |
1477 | errno = xerrno; |
1478 | report_file_error ("connection failed", | |
1479 | Fcons (host, Fcons (name, Qnil))); | |
1480 | } | |
457a9bee RS |
1481 | |
1482 | if (interrupt_input) | |
1483 | request_sigio (); | |
1484 | ||
1d2c16fa RS |
1485 | #else /* TERM */ |
1486 | s = connect_server (0); | |
1487 | if (s < 0) | |
1488 | report_file_error ("error creating socket", Fcons (name, Qnil)); | |
1489 | send_command (s, C_PORT, 0, "%s:%d", XSTRING (host)->data, ntohs (port)); | |
1490 | send_command (s, C_DUMB, 1, 0); | |
1491 | #endif /* TERM */ | |
d0d6b7c5 JB |
1492 | |
1493 | inch = s; | |
1494 | outch = dup (s); | |
1495 | if (outch < 0) | |
1496 | report_file_error ("error duplicating socket", Fcons (name, Qnil)); | |
1497 | ||
1498 | if (!NILP (buffer)) | |
1499 | buffer = Fget_buffer_create (buffer); | |
1500 | proc = make_process (name); | |
1501 | ||
1502 | chan_process[inch] = proc; | |
1503 | ||
1504 | #ifdef O_NONBLOCK | |
1505 | fcntl (inch, F_SETFL, O_NONBLOCK); | |
1506 | #else | |
1507 | #ifdef O_NDELAY | |
1508 | fcntl (inch, F_SETFL, O_NDELAY); | |
1509 | #endif | |
1510 | #endif | |
1511 | ||
1512 | XPROCESS (proc)->childp = host; | |
1513 | XPROCESS (proc)->command_channel_p = Qnil; | |
1514 | XPROCESS (proc)->buffer = buffer; | |
1515 | XPROCESS (proc)->sentinel = Qnil; | |
1516 | XPROCESS (proc)->filter = Qnil; | |
1517 | XPROCESS (proc)->command = Qnil; | |
1518 | XPROCESS (proc)->pid = Qnil; | |
a9f2c884 RS |
1519 | XSET (XPROCESS (proc)->infd, Lisp_Int, s); |
1520 | XSET (XPROCESS (proc)->outfd, Lisp_Int, outch); | |
d0d6b7c5 JB |
1521 | XPROCESS (proc)->status = Qrun; |
1522 | FD_SET (inch, &input_wait_mask); | |
1523 | ||
1524 | UNGCPRO; | |
1525 | return proc; | |
1526 | } | |
1527 | #endif /* HAVE_SOCKETS */ | |
1528 | ||
1529 | deactivate_process (proc) | |
1530 | Lisp_Object proc; | |
1531 | { | |
1532 | register int inchannel, outchannel; | |
1533 | register struct Lisp_Process *p = XPROCESS (proc); | |
1534 | ||
a9f2c884 RS |
1535 | inchannel = XINT (p->infd); |
1536 | outchannel = XINT (p->outfd); | |
d0d6b7c5 | 1537 | |
a9f2c884 | 1538 | if (inchannel >= 0) |
d0d6b7c5 JB |
1539 | { |
1540 | /* Beware SIGCHLD hereabouts. */ | |
1541 | flush_pending_output (inchannel); | |
1542 | #ifdef VMS | |
1543 | { | |
1544 | VMS_PROC_STUFF *get_vms_process_pointer (), *vs; | |
1545 | sys$dassgn (outchannel); | |
c6c6865d | 1546 | vs = get_vms_process_pointer (p->pid); |
d0d6b7c5 JB |
1547 | if (vs) |
1548 | give_back_vms_process_stuff (vs); | |
1549 | } | |
1550 | #else | |
1551 | close (inchannel); | |
a9f2c884 | 1552 | if (outchannel >= 0 && outchannel != inchannel) |
d0d6b7c5 JB |
1553 | close (outchannel); |
1554 | #endif | |
1555 | ||
a9f2c884 RS |
1556 | XSET (p->infd, Lisp_Int, -1); |
1557 | XSET (p->outfd, Lisp_Int, -1); | |
d0d6b7c5 JB |
1558 | chan_process[inchannel] = Qnil; |
1559 | FD_CLR (inchannel, &input_wait_mask); | |
1560 | } | |
1561 | } | |
1562 | ||
1563 | /* Close all descriptors currently in use for communication | |
1564 | with subprocess. This is used in a newly-forked subprocess | |
1565 | to get rid of irrelevant descriptors. */ | |
1566 | ||
1567 | close_process_descs () | |
1568 | { | |
1569 | int i; | |
1570 | for (i = 0; i < MAXDESC; i++) | |
1571 | { | |
1572 | Lisp_Object process; | |
1573 | process = chan_process[i]; | |
1574 | if (!NILP (process)) | |
1575 | { | |
a9f2c884 RS |
1576 | int in = XINT (XPROCESS (process)->infd); |
1577 | int out = XINT (XPROCESS (process)->outfd); | |
1578 | if (in >= 0) | |
d0d6b7c5 | 1579 | close (in); |
a9f2c884 | 1580 | if (out >= 0 && in != out) |
d0d6b7c5 JB |
1581 | close (out); |
1582 | } | |
1583 | } | |
1584 | } | |
1585 | \f | |
1586 | DEFUN ("accept-process-output", Faccept_process_output, Saccept_process_output, | |
1587 | 0, 3, 0, | |
1588 | "Allow any pending output from subprocesses to be read by Emacs.\n\ | |
1589 | It is read into the process' buffers or given to their filter functions.\n\ | |
1590 | Non-nil arg PROCESS means do not return until some output has been received\n\ | |
1591 | from PROCESS.\n\ | |
1592 | Non-nil second arg TIMEOUT and third arg TIMEOUT-MSECS are number of\n\ | |
1593 | seconds and microseconds to wait; return after that much time whether\n\ | |
1594 | or not there is input.\n\ | |
1595 | Return non-nil iff we received any output before the timeout expired.") | |
1596 | (proc, timeout, timeout_msecs) | |
1597 | register Lisp_Object proc, timeout, timeout_msecs; | |
1598 | { | |
1599 | int seconds; | |
1600 | int useconds; | |
1601 | ||
1602 | if (! NILP (timeout_msecs)) | |
1603 | { | |
1604 | CHECK_NUMBER (timeout_msecs, 2); | |
1605 | useconds = XINT (timeout_msecs); | |
1606 | if (XTYPE (timeout) != Lisp_Int) | |
1607 | XSET (timeout, Lisp_Int, 0); | |
1608 | ||
1609 | { | |
1610 | int carry = useconds / 1000000; | |
1611 | ||
1612 | XSETINT (timeout, XINT (timeout) + carry); | |
1613 | useconds -= carry * 1000000; | |
1614 | ||
1615 | /* I think this clause is necessary because C doesn't | |
1616 | guarantee a particular rounding direction for negative | |
1617 | integers. */ | |
1618 | if (useconds < 0) | |
1619 | { | |
1620 | XSETINT (timeout, XINT (timeout) - 1); | |
1621 | useconds += 1000000; | |
1622 | } | |
1623 | } | |
1624 | } | |
de946e5a RS |
1625 | else |
1626 | useconds = 0; | |
d0d6b7c5 JB |
1627 | |
1628 | if (! NILP (timeout)) | |
1629 | { | |
1630 | CHECK_NUMBER (timeout, 1); | |
1631 | seconds = XINT (timeout); | |
1632 | if (seconds <= 0) | |
1633 | seconds = -1; | |
1634 | } | |
1635 | else | |
1636 | { | |
1637 | if (NILP (proc)) | |
1638 | seconds = -1; | |
1639 | else | |
1640 | seconds = 0; | |
1641 | } | |
1642 | ||
f76475ad JB |
1643 | if (NILP (proc)) |
1644 | XFASTINT (proc) = 0; | |
1645 | ||
d0d6b7c5 | 1646 | return |
f76475ad | 1647 | (wait_reading_process_input (seconds, useconds, proc, 0) |
d0d6b7c5 JB |
1648 | ? Qt : Qnil); |
1649 | } | |
1650 | ||
1651 | /* This variable is different from waiting_for_input in keyboard.c. | |
1652 | It is used to communicate to a lisp process-filter/sentinel (via the | |
1653 | function Fwaiting_for_user_input_p below) whether emacs was waiting | |
1654 | for user-input when that process-filter was called. | |
1655 | waiting_for_input cannot be used as that is by definition 0 when | |
1656 | lisp code is being evalled */ | |
1657 | static int waiting_for_user_input_p; | |
1658 | ||
1659 | /* Read and dispose of subprocess output while waiting for timeout to | |
1660 | elapse and/or keyboard input to be available. | |
1661 | ||
de6fd4b9 | 1662 | TIME_LIMIT is: |
d0d6b7c5 JB |
1663 | timeout in seconds, or |
1664 | zero for no limit, or | |
1665 | -1 means gobble data immediately available but don't wait for any. | |
1666 | ||
de6fd4b9 RS |
1667 | MICROSECS is: |
1668 | an additional duration to wait, measured in microseconds. | |
1669 | If this is nonzero and time_limit is 0, then the timeout | |
1670 | consists of MICROSECS only. | |
6e4f3667 | 1671 | |
de6fd4b9 | 1672 | READ_KBD is a lisp value: |
d0d6b7c5 JB |
1673 | 0 to ignore keyboard input, or |
1674 | 1 to return when input is available, or | |
84aa3ace | 1675 | -1 meaning caller will actually read the input, so don't throw to |
d0d6b7c5 | 1676 | the quit handler, or |
de6fd4b9 RS |
1677 | a cons cell, meaning wait wait until its car is non-nil |
1678 | (and gobble terminal input into the buffer if any arrives), or | |
f76475ad JB |
1679 | a process object, meaning wait until something arrives from that |
1680 | process. The return value is true iff we read some input from | |
1681 | that process. | |
d0d6b7c5 | 1682 | |
de6fd4b9 | 1683 | DO_DISPLAY != 0 means redisplay should be done to show subprocess |
d0d6b7c5 JB |
1684 | output that arrives. |
1685 | ||
de6fd4b9 | 1686 | If READ_KBD is a pointer to a struct Lisp_Process, then the |
d0d6b7c5 JB |
1687 | function returns true iff we received input from that process |
1688 | before the timeout elapsed. | |
eb8c3be9 | 1689 | Otherwise, return true iff we received input from any process. */ |
d0d6b7c5 JB |
1690 | |
1691 | wait_reading_process_input (time_limit, microsecs, read_kbd, do_display) | |
f76475ad JB |
1692 | int time_limit, microsecs; |
1693 | Lisp_Object read_kbd; | |
1694 | int do_display; | |
d0d6b7c5 JB |
1695 | { |
1696 | register int channel, nfds, m; | |
1697 | static SELECT_TYPE Available; | |
1698 | int xerrno; | |
1699 | Lisp_Object proc; | |
1700 | EMACS_TIME timeout, end_time, garbage; | |
1701 | SELECT_TYPE Atemp; | |
a9f2c884 | 1702 | int wait_channel = -1; |
d0d6b7c5 JB |
1703 | struct Lisp_Process *wait_proc = 0; |
1704 | int got_some_input = 0; | |
84aa3ace | 1705 | Lisp_Object *wait_for_cell = 0; |
d0d6b7c5 JB |
1706 | |
1707 | FD_ZERO (&Available); | |
1708 | ||
f76475ad JB |
1709 | /* If read_kbd is a process to watch, set wait_proc and wait_channel |
1710 | accordingly. */ | |
1711 | if (XTYPE (read_kbd) == Lisp_Process) | |
d0d6b7c5 | 1712 | { |
f76475ad | 1713 | wait_proc = XPROCESS (read_kbd); |
a9f2c884 | 1714 | wait_channel = XINT (wait_proc->infd); |
f76475ad | 1715 | XFASTINT (read_kbd) = 0; |
d0d6b7c5 JB |
1716 | } |
1717 | ||
84aa3ace RS |
1718 | /* If waiting for non-nil in a cell, record where. */ |
1719 | if (XTYPE (read_kbd) == Lisp_Cons) | |
1720 | { | |
1721 | wait_for_cell = &XCONS (read_kbd)->car; | |
1722 | XFASTINT (read_kbd) = 0; | |
1723 | } | |
1724 | ||
f76475ad | 1725 | waiting_for_user_input_p = XINT (read_kbd); |
d0d6b7c5 JB |
1726 | |
1727 | /* Since we may need to wait several times, | |
1728 | compute the absolute time to return at. */ | |
1729 | if (time_limit || microsecs) | |
1730 | { | |
1731 | EMACS_GET_TIME (end_time); | |
1732 | EMACS_SET_SECS_USECS (timeout, time_limit, microsecs); | |
1733 | EMACS_ADD_TIME (end_time, end_time, timeout); | |
1734 | } | |
1735 | ||
99e3d726 RS |
1736 | /* It would not be safe to call this below, |
1737 | where we call redisplay_preserve_echo_area. */ | |
1738 | prepare_menu_bars (); | |
1739 | ||
d0d6b7c5 JB |
1740 | while (1) |
1741 | { | |
1742 | /* If calling from keyboard input, do not quit | |
1743 | since we want to return C-g as an input character. | |
1744 | Otherwise, do pending quit if requested. */ | |
f76475ad | 1745 | if (XINT (read_kbd) >= 0) |
d0d6b7c5 JB |
1746 | QUIT; |
1747 | ||
889255b4 RS |
1748 | /* Exit now if the cell we're waiting for became non-nil. */ |
1749 | if (wait_for_cell && ! NILP (*wait_for_cell)) | |
1750 | break; | |
1751 | ||
d0d6b7c5 JB |
1752 | /* Compute time from now till when time limit is up */ |
1753 | /* Exit if already run out */ | |
1754 | if (time_limit == -1) | |
1755 | { | |
1756 | /* -1 specified for timeout means | |
1757 | gobble output available now | |
1758 | but don't wait at all. */ | |
1759 | ||
1760 | EMACS_SET_SECS_USECS (timeout, 0, 0); | |
1761 | } | |
1762 | else if (time_limit || microsecs) | |
1763 | { | |
1764 | EMACS_GET_TIME (timeout); | |
1765 | EMACS_SUB_TIME (timeout, end_time, timeout); | |
1766 | if (EMACS_TIME_NEG_P (timeout)) | |
1767 | break; | |
1768 | } | |
1769 | else | |
1770 | { | |
1771 | EMACS_SET_SECS_USECS (timeout, 100000, 0); | |
1772 | } | |
1773 | ||
90ab1a81 JB |
1774 | /* Cause C-g and alarm signals to take immediate action, |
1775 | and cause input available signals to zero out timeout. | |
1776 | ||
1777 | It is important that we do this before checking for process | |
1778 | activity. If we get a SIGCHLD after the explicit checks for | |
1779 | process activity, timeout is the only way we will know. */ | |
1780 | if (XINT (read_kbd) < 0) | |
1781 | set_waiting_for_input (&timeout); | |
1782 | ||
6be429b1 JB |
1783 | /* If status of something has changed, and no input is |
1784 | available, notify the user of the change right away. After | |
1785 | this explicit check, we'll let the SIGCHLD handler zap | |
1786 | timeout to get our attention. */ | |
1787 | if (update_tick != process_tick && do_display) | |
1788 | { | |
1789 | Atemp = input_wait_mask; | |
1790 | EMACS_SET_SECS_USECS (timeout, 0, 0); | |
1791 | if (select (MAXDESC, &Atemp, 0, 0, &timeout) <= 0) | |
90ab1a81 JB |
1792 | { |
1793 | /* It's okay for us to do this and then continue with | |
1794 | the loop, since timeout has already been zeroed out. */ | |
1795 | clear_waiting_for_input (); | |
1796 | status_notify (); | |
1797 | } | |
6be429b1 JB |
1798 | } |
1799 | ||
1800 | /* Don't wait for output from a non-running process. */ | |
1801 | if (wait_proc != 0 && !NILP (wait_proc->raw_status_low)) | |
1802 | update_status (wait_proc); | |
1803 | if (wait_proc != 0 | |
1804 | && ! EQ (wait_proc->status, Qrun)) | |
9aa2a7f4 JB |
1805 | { |
1806 | clear_waiting_for_input (); | |
1807 | break; | |
1808 | } | |
6be429b1 | 1809 | |
d0d6b7c5 JB |
1810 | /* Wait till there is something to do */ |
1811 | ||
1812 | Available = input_wait_mask; | |
6cbc22ed RS |
1813 | /* We used to have && wait_for_cell == 0 |
1814 | but that led to lossage handling selection_request events: | |
1815 | within one, we would start to handle another. */ | |
1816 | if (! XINT (read_kbd)) | |
dd2281ae | 1817 | FD_CLR (keyboard_descriptor, &Available); |
d0d6b7c5 | 1818 | |
ff11dfa1 | 1819 | /* If frame size has changed or the window is newly mapped, |
ffd56f97 JB |
1820 | redisplay now, before we start to wait. There is a race |
1821 | condition here; if a SIGIO arrives between now and the select | |
016899c0 JB |
1822 | and indicates that a frame is trashed, the select may block |
1823 | displaying a trashed screen. */ | |
ff11dfa1 | 1824 | if (frame_garbaged) |
ffd56f97 JB |
1825 | redisplay_preserve_echo_area (); |
1826 | ||
f76475ad | 1827 | if (XINT (read_kbd) && detect_input_pending ()) |
a9f2c884 RS |
1828 | { |
1829 | nfds = 0; | |
1830 | FD_ZERO (&Available); | |
1831 | } | |
d0d6b7c5 | 1832 | else |
d0d6b7c5 | 1833 | nfds = select (MAXDESC, &Available, 0, 0, &timeout); |
6720a7fb | 1834 | |
d0d6b7c5 JB |
1835 | xerrno = errno; |
1836 | ||
1837 | /* Make C-g and alarm signals set flags again */ | |
1838 | clear_waiting_for_input (); | |
1839 | ||
1840 | /* If we woke up due to SIGWINCH, actually change size now. */ | |
1841 | do_pending_window_change (); | |
1842 | ||
ffd56f97 | 1843 | if (time_limit && nfds == 0) /* timeout elapsed */ |
d0d6b7c5 JB |
1844 | break; |
1845 | if (nfds < 0) | |
1846 | { | |
1847 | if (xerrno == EINTR) | |
1848 | FD_ZERO (&Available); | |
b0310da4 JB |
1849 | #ifdef ultrix |
1850 | /* Ultrix select seems to return ENOMEM when it is | |
1851 | interrupted. Treat it just like EINTR. Bleah. Note | |
1852 | that we want to test for the "ultrix" CPP symbol, not | |
1853 | "__ultrix__"; the latter is only defined under GCC, but | |
1854 | not by DEC's bundled CC. -JimB */ | |
8058415c JB |
1855 | else if (xerrno == ENOMEM) |
1856 | FD_ZERO (&Available); | |
1857 | #endif | |
d0d6b7c5 JB |
1858 | #ifdef ALLIANT |
1859 | /* This happens for no known reason on ALLIANT. | |
1860 | I am guessing that this is the right response. -- RMS. */ | |
1861 | else if (xerrno == EFAULT) | |
1862 | FD_ZERO (&Available); | |
1863 | #endif | |
1864 | else if (xerrno == EBADF) | |
1865 | { | |
1866 | #ifdef AIX | |
1867 | /* AIX doesn't handle PTY closure the same way BSD does. On AIX, | |
1868 | the child's closure of the pts gives the parent a SIGHUP, and | |
1869 | the ptc file descriptor is automatically closed, | |
1870 | yielding EBADF here or at select() call above. | |
1871 | So, SIGHUP is ignored (see def of PTY_TTY_NAME_SPRINTF | |
1872 | in m-ibmrt-aix.h), and here we just ignore the select error. | |
1873 | Cleanup occurs c/o status_notify after SIGCLD. */ | |
ffd56f97 | 1874 | FD_ZERO (&Available); /* Cannot depend on values returned */ |
d0d6b7c5 JB |
1875 | #else |
1876 | abort (); | |
1877 | #endif | |
1878 | } | |
1879 | else | |
1880 | error("select error: %s", sys_errlist[xerrno]); | |
1881 | } | |
26ec91de | 1882 | #if defined(sun) && !defined(USG5_4) |
dd2281ae RS |
1883 | else if (nfds > 0 && FD_ISSET (keyboard_descriptor, &Available) |
1884 | && interrupt_input) | |
e0109153 JB |
1885 | /* System sometimes fails to deliver SIGIO. |
1886 | ||
1887 | David J. Mackenzie says that Emacs doesn't compile under | |
1888 | Solaris if this code is enabled, thus the USG5_4 in the CPP | |
1889 | conditional. "I haven't noticed any ill effects so far. | |
1890 | If you find a Solaris expert somewhere, they might know | |
1891 | better." */ | |
d0d6b7c5 JB |
1892 | kill (getpid (), SIGIO); |
1893 | #endif | |
1894 | ||
1895 | /* Check for keyboard input */ | |
1896 | /* If there is any, return immediately | |
1897 | to give it higher priority than subprocesses */ | |
1898 | ||
6cbc22ed RS |
1899 | /* We used to do his if wait_for_cell, |
1900 | but that caused infinite recursion in selection request events. */ | |
1901 | if ((XINT (read_kbd)) | |
97f3b3d6 | 1902 | && detect_input_pending ()) |
6e103bac RS |
1903 | { |
1904 | swallow_events (); | |
1905 | if (detect_input_pending ()) | |
1906 | break; | |
1907 | } | |
d0d6b7c5 | 1908 | |
84aa3ace RS |
1909 | /* Exit now if the cell we're waiting for became non-nil. */ |
1910 | if (wait_for_cell && ! NILP (*wait_for_cell)) | |
1911 | break; | |
1912 | ||
4746118a | 1913 | #ifdef SIGIO |
d0d6b7c5 JB |
1914 | /* If we think we have keyboard input waiting, but didn't get SIGIO |
1915 | go read it. This can happen with X on BSD after logging out. | |
1916 | In that case, there really is no input and no SIGIO, | |
1917 | but select says there is input. */ | |
1918 | ||
dd2281ae RS |
1919 | if (XINT (read_kbd) && interrupt_input |
1920 | && (FD_ISSET (keyboard_descriptor, &Available))) | |
d0d6b7c5 | 1921 | kill (0, SIGIO); |
4746118a | 1922 | #endif |
d0d6b7c5 | 1923 | |
d0d6b7c5 JB |
1924 | if (! wait_proc) |
1925 | got_some_input |= nfds > 0; | |
1926 | ||
32676c08 JB |
1927 | /* If checking input just got us a size-change event from X, |
1928 | obey it now if we should. */ | |
97f3b3d6 | 1929 | if (XINT (read_kbd) || wait_for_cell) |
32676c08 JB |
1930 | do_pending_window_change (); |
1931 | ||
a9f2c884 RS |
1932 | /* Check for data from a process. */ |
1933 | /* Really FIRST_PROC_DESC should be 0 on Unix, | |
1934 | but this is safer in the short run. */ | |
1935 | for (channel = keyboard_descriptor == 0 ? FIRST_PROC_DESC : 0; | |
1936 | channel < MAXDESC; channel++) | |
d0d6b7c5 JB |
1937 | { |
1938 | if (FD_ISSET (channel, &Available)) | |
1939 | { | |
1940 | int nread; | |
1941 | ||
1942 | /* If waiting for this channel, arrange to return as | |
1943 | soon as no more input to be processed. No more | |
1944 | waiting. */ | |
1945 | if (wait_channel == channel) | |
1946 | { | |
a9f2c884 | 1947 | wait_channel = -1; |
d0d6b7c5 JB |
1948 | time_limit = -1; |
1949 | got_some_input = 1; | |
1950 | } | |
1951 | proc = chan_process[channel]; | |
1952 | if (NILP (proc)) | |
1953 | continue; | |
1954 | ||
d0d6b7c5 JB |
1955 | /* Read data from the process, starting with our |
1956 | buffered-ahead character if we have one. */ | |
1957 | ||
1958 | nread = read_process_output (proc, channel); | |
1959 | if (nread > 0) | |
1960 | { | |
1961 | /* Since read_process_output can run a filter, | |
1962 | which can call accept-process-output, | |
1963 | don't try to read from any other processes | |
1964 | before doing the select again. */ | |
1965 | FD_ZERO (&Available); | |
1966 | ||
1967 | if (do_display) | |
1968 | redisplay_preserve_echo_area (); | |
1969 | } | |
1970 | #ifdef EWOULDBLOCK | |
1971 | else if (nread == -1 && errno == EWOULDBLOCK) | |
1972 | ; | |
1973 | #else | |
1974 | #ifdef O_NONBLOCK | |
1975 | else if (nread == -1 && errno == EAGAIN) | |
1976 | ; | |
1977 | #else | |
1978 | #ifdef O_NDELAY | |
1979 | else if (nread == -1 && errno == EAGAIN) | |
1980 | ; | |
1981 | /* Note that we cannot distinguish between no input | |
1982 | available now and a closed pipe. | |
1983 | With luck, a closed pipe will be accompanied by | |
1984 | subprocess termination and SIGCHLD. */ | |
1985 | else if (nread == 0 && !NETCONN_P (proc)) | |
1986 | ; | |
ffd56f97 JB |
1987 | #endif /* O_NDELAY */ |
1988 | #endif /* O_NONBLOCK */ | |
1989 | #endif /* EWOULDBLOCK */ | |
d0d6b7c5 JB |
1990 | #ifdef HAVE_PTYS |
1991 | /* On some OSs with ptys, when the process on one end of | |
1992 | a pty exits, the other end gets an error reading with | |
1993 | errno = EIO instead of getting an EOF (0 bytes read). | |
1994 | Therefore, if we get an error reading and errno = | |
1995 | EIO, just continue, because the child process has | |
1996 | exited and should clean itself up soon (e.g. when we | |
1997 | get a SIGCHLD). */ | |
1998 | else if (nread == -1 && errno == EIO) | |
1999 | ; | |
ffd56f97 JB |
2000 | #endif /* HAVE_PTYS */ |
2001 | /* If we can detect process termination, don't consider the process | |
2002 | gone just because its pipe is closed. */ | |
d0d6b7c5 JB |
2003 | #ifdef SIGCHLD |
2004 | else if (nread == 0 && !NETCONN_P (proc)) | |
2005 | ; | |
2006 | #endif | |
2007 | else | |
2008 | { | |
2009 | /* Preserve status of processes already terminated. */ | |
2010 | XSETINT (XPROCESS (proc)->tick, ++process_tick); | |
2011 | deactivate_process (proc); | |
2012 | if (!NILP (XPROCESS (proc)->raw_status_low)) | |
2013 | update_status (XPROCESS (proc)); | |
2014 | if (EQ (XPROCESS (proc)->status, Qrun)) | |
2015 | XPROCESS (proc)->status | |
2016 | = Fcons (Qexit, Fcons (make_number (256), Qnil)); | |
2017 | } | |
2018 | } | |
ffd56f97 JB |
2019 | } /* end for each file descriptor */ |
2020 | } /* end while exit conditions not met */ | |
d0d6b7c5 | 2021 | |
ffd56f97 JB |
2022 | /* If calling from keyboard input, do not quit |
2023 | since we want to return C-g as an input character. | |
2024 | Otherwise, do pending quit if requested. */ | |
f76475ad | 2025 | if (XINT (read_kbd) >= 0) |
ffd56f97 JB |
2026 | { |
2027 | /* Prevent input_pending from remaining set if we quit. */ | |
2028 | clear_input_pending (); | |
2029 | QUIT; | |
2030 | } | |
d0d6b7c5 JB |
2031 | |
2032 | return got_some_input; | |
2033 | } | |
2034 | \f | |
2035 | /* Read pending output from the process channel, | |
2036 | starting with our buffered-ahead character if we have one. | |
2037 | Yield number of characters read. | |
2038 | ||
2039 | This function reads at most 1024 characters. | |
2040 | If you want to read all available subprocess output, | |
2041 | you must call it repeatedly until it returns zero. */ | |
2042 | ||
2043 | read_process_output (proc, channel) | |
2044 | Lisp_Object proc; | |
2045 | register int channel; | |
2046 | { | |
2047 | register int nchars; | |
2048 | #ifdef VMS | |
2049 | char *chars; | |
2050 | #else | |
2051 | char chars[1024]; | |
2052 | #endif | |
2053 | register Lisp_Object outstream; | |
2054 | register struct buffer *old = current_buffer; | |
2055 | register struct Lisp_Process *p = XPROCESS (proc); | |
2056 | register int opoint; | |
2057 | ||
2058 | #ifdef VMS | |
2059 | VMS_PROC_STUFF *vs, *get_vms_process_pointer(); | |
2060 | ||
2061 | vs = get_vms_process_pointer (p->pid); | |
2062 | if (vs) | |
2063 | { | |
2064 | if (!vs->iosb[0]) | |
2065 | return(0); /* Really weird if it does this */ | |
2066 | if (!(vs->iosb[0] & 1)) | |
2067 | return -1; /* I/O error */ | |
2068 | } | |
2069 | else | |
2070 | error ("Could not get VMS process pointer"); | |
2071 | chars = vs->inputBuffer; | |
2072 | nchars = clean_vms_buffer (chars, vs->iosb[1]); | |
2073 | if (nchars <= 0) | |
2074 | { | |
2075 | start_vms_process_read (vs); /* Crank up the next read on the process */ | |
2076 | return 1; /* Nothing worth printing, say we got 1 */ | |
2077 | } | |
2078 | #else /* not VMS */ | |
2079 | ||
2080 | if (proc_buffered_char[channel] < 0) | |
2081 | nchars = read (channel, chars, sizeof chars); | |
2082 | else | |
2083 | { | |
2084 | chars[0] = proc_buffered_char[channel]; | |
2085 | proc_buffered_char[channel] = -1; | |
2086 | nchars = read (channel, chars + 1, sizeof chars - 1); | |
2087 | if (nchars < 0) | |
2088 | nchars = 1; | |
2089 | else | |
2090 | nchars = nchars + 1; | |
2091 | } | |
2092 | #endif /* not VMS */ | |
2093 | ||
2094 | if (nchars <= 0) return nchars; | |
2095 | ||
2096 | outstream = p->filter; | |
2097 | if (!NILP (outstream)) | |
2098 | { | |
2099 | /* We inhibit quit here instead of just catching it so that | |
2100 | hitting ^G when a filter happens to be running won't screw | |
2101 | it up. */ | |
2102 | int count = specpdl_ptr - specpdl; | |
30c78175 RS |
2103 | Lisp_Object odeactivate; |
2104 | ||
2105 | odeactivate = Vdeactivate_mark; | |
2106 | ||
d0d6b7c5 JB |
2107 | specbind (Qinhibit_quit, Qt); |
2108 | call2 (outstream, proc, make_string (chars, nchars)); | |
2109 | ||
592ce97f | 2110 | /* Handling the process output should not deactivate the mark. */ |
30c78175 RS |
2111 | Vdeactivate_mark = odeactivate; |
2112 | ||
d0d6b7c5 JB |
2113 | #ifdef VMS |
2114 | start_vms_process_read (vs); | |
2115 | #endif | |
2116 | unbind_to (count); | |
2117 | return nchars; | |
2118 | } | |
2119 | ||
2120 | /* If no filter, write into buffer if it isn't dead. */ | |
2121 | if (!NILP (p->buffer) && !NILP (XBUFFER (p->buffer)->name)) | |
2122 | { | |
b0310da4 JB |
2123 | Lisp_Object old_read_only; |
2124 | Lisp_Object old_begv, old_zv; | |
30c78175 RS |
2125 | Lisp_Object odeactivate; |
2126 | ||
2127 | odeactivate = Vdeactivate_mark; | |
d0d6b7c5 JB |
2128 | |
2129 | Fset_buffer (p->buffer); | |
2130 | opoint = point; | |
b0310da4 JB |
2131 | old_read_only = current_buffer->read_only; |
2132 | XFASTINT (old_begv) = BEGV; | |
2133 | XFASTINT (old_zv) = ZV; | |
2134 | ||
2135 | current_buffer->read_only = Qnil; | |
d0d6b7c5 JB |
2136 | |
2137 | /* Insert new output into buffer | |
2138 | at the current end-of-output marker, | |
2139 | thus preserving logical ordering of input and output. */ | |
2140 | if (XMARKER (p->mark)->buffer) | |
53aad33f | 2141 | SET_PT (clip_to_bounds (BEGV, marker_position (p->mark), ZV)); |
d0d6b7c5 JB |
2142 | else |
2143 | SET_PT (ZV); | |
b0310da4 JB |
2144 | |
2145 | /* If the output marker is outside of the visible region, save | |
2146 | the restriction and widen. */ | |
2147 | if (! (BEGV <= point && point <= ZV)) | |
2148 | Fwiden (); | |
2149 | ||
2150 | /* Make sure opoint floats ahead of any new text, just as point | |
2151 | would. */ | |
d0d6b7c5 JB |
2152 | if (point <= opoint) |
2153 | opoint += nchars; | |
2154 | ||
b0310da4 JB |
2155 | /* Insert after old_begv, but before old_zv. */ |
2156 | if (point < XFASTINT (old_begv)) | |
2157 | XFASTINT (old_begv) += nchars; | |
2158 | if (point <= XFASTINT (old_zv)) | |
2159 | XFASTINT (old_zv) += nchars; | |
2160 | ||
d0d6b7c5 JB |
2161 | /* Insert before markers in case we are inserting where |
2162 | the buffer's mark is, and the user's next command is Meta-y. */ | |
2163 | insert_before_markers (chars, nchars); | |
d0d6b7c5 | 2164 | Fset_marker (p->mark, make_number (point), p->buffer); |
b0310da4 | 2165 | |
d0d6b7c5 JB |
2166 | update_mode_lines++; |
2167 | ||
b0310da4 JB |
2168 | /* If the restriction isn't what it should be, set it. */ |
2169 | if (XFASTINT (old_begv) != BEGV || XFASTINT (old_zv) != ZV) | |
2170 | Fnarrow_to_region (old_begv, old_zv); | |
2171 | ||
592ce97f | 2172 | /* Handling the process output should not deactivate the mark. */ |
30c78175 RS |
2173 | Vdeactivate_mark = odeactivate; |
2174 | ||
b0310da4 | 2175 | current_buffer->read_only = old_read_only; |
d0d6b7c5 JB |
2176 | SET_PT (opoint); |
2177 | set_buffer_internal (old); | |
2178 | } | |
2179 | #ifdef VMS | |
2180 | start_vms_process_read (vs); | |
2181 | #endif | |
2182 | return nchars; | |
2183 | } | |
2184 | ||
2185 | DEFUN ("waiting-for-user-input-p", Fwaiting_for_user_input_p, Swaiting_for_user_input_p, | |
2186 | 0, 0, 0, | |
2187 | "Returns non-NIL if emacs is waiting for input from the user.\n\ | |
2188 | This is intended for use by asynchronous process output filters and sentinels.") | |
2189 | () | |
2190 | { | |
2191 | return ((waiting_for_user_input_p) ? Qt : Qnil); | |
2192 | } | |
2193 | \f | |
2194 | /* Sending data to subprocess */ | |
2195 | ||
2196 | jmp_buf send_process_frame; | |
2197 | ||
2198 | SIGTYPE | |
2199 | send_process_trap () | |
2200 | { | |
2201 | #ifdef BSD4_1 | |
2202 | sigrelse (SIGPIPE); | |
2203 | sigrelse (SIGALRM); | |
2204 | #endif /* BSD4_1 */ | |
2205 | longjmp (send_process_frame, 1); | |
2206 | } | |
2207 | ||
2208 | send_process (proc, buf, len) | |
2209 | Lisp_Object proc; | |
2210 | char *buf; | |
2211 | int len; | |
2212 | { | |
2213 | /* Don't use register vars; longjmp can lose them. */ | |
2214 | int rv; | |
2215 | unsigned char *procname = XSTRING (XPROCESS (proc)->name)->data; | |
2216 | ||
2217 | ||
2218 | #ifdef VMS | |
2219 | struct Lisp_Process *p = XPROCESS (proc); | |
2220 | VMS_PROC_STUFF *vs, *get_vms_process_pointer(); | |
2221 | #endif /* VMS */ | |
2222 | ||
2223 | if (! NILP (XPROCESS (proc)->raw_status_low)) | |
2224 | update_status (XPROCESS (proc)); | |
2225 | if (! EQ (XPROCESS (proc)->status, Qrun)) | |
2226 | error ("Process %s not running", procname); | |
2227 | ||
2228 | #ifdef VMS | |
2229 | vs = get_vms_process_pointer (p->pid); | |
2230 | if (vs == 0) | |
2231 | error ("Could not find this process: %x", p->pid); | |
2232 | else if (write_to_vms_process (vs, buf, len)) | |
2233 | ; | |
2234 | #else | |
2235 | if (!setjmp (send_process_frame)) | |
2236 | while (len > 0) | |
2237 | { | |
2238 | int this = len; | |
4746118a JB |
2239 | SIGTYPE (*old_sigpipe)(); |
2240 | ||
d0d6b7c5 JB |
2241 | /* Don't send more than 500 bytes at a time. */ |
2242 | if (this > 500) | |
2243 | this = 500; | |
508b171c | 2244 | old_sigpipe = (SIGTYPE (*) ()) signal (SIGPIPE, send_process_trap); |
a9f2c884 | 2245 | rv = write (XINT (XPROCESS (proc)->outfd), buf, this); |
4746118a | 2246 | signal (SIGPIPE, old_sigpipe); |
d0d6b7c5 JB |
2247 | if (rv < 0) |
2248 | { | |
2249 | if (0 | |
2250 | #ifdef EWOULDBLOCK | |
2251 | || errno == EWOULDBLOCK | |
2252 | #endif | |
2253 | #ifdef EAGAIN | |
2254 | || errno == EAGAIN | |
2255 | #endif | |
2256 | ) | |
2257 | { | |
2258 | /* It would be nice to accept process output here, | |
2259 | but that is difficult. For example, it could | |
2260 | garbage what we are sending if that is from a buffer. */ | |
2261 | immediate_quit = 1; | |
2262 | QUIT; | |
2263 | sleep (1); | |
2264 | immediate_quit = 0; | |
2265 | continue; | |
2266 | } | |
2267 | report_file_error ("writing to process", Fcons (proc, Qnil)); | |
2268 | } | |
2269 | buf += rv; | |
2270 | len -= rv; | |
2271 | /* Allow input from processes between bursts of sending. | |
2272 | Otherwise things may get stopped up. */ | |
2273 | if (len > 0) | |
f76475ad JB |
2274 | { |
2275 | Lisp_Object zero; | |
2276 | ||
2277 | XFASTINT (zero) = 0; | |
2278 | wait_reading_process_input (-1, 0, zero, 0); | |
2279 | } | |
d0d6b7c5 JB |
2280 | } |
2281 | #endif | |
2282 | else | |
2283 | { | |
2284 | XPROCESS (proc)->raw_status_low = Qnil; | |
2285 | XPROCESS (proc)->raw_status_high = Qnil; | |
2286 | XPROCESS (proc)->status = Fcons (Qexit, Fcons (make_number (256), Qnil)); | |
2287 | XSETINT (XPROCESS (proc)->tick, ++process_tick); | |
2288 | deactivate_process (proc); | |
2289 | #ifdef VMS | |
2290 | error ("Error writing to process %s; closed it", procname); | |
2291 | #else | |
2292 | error ("SIGPIPE raised on process %s; closed it", procname); | |
2293 | #endif | |
2294 | } | |
2295 | } | |
2296 | ||
2297 | DEFUN ("process-send-region", Fprocess_send_region, Sprocess_send_region, | |
2298 | 3, 3, 0, | |
2299 | "Send current contents of region as input to PROCESS.\n\ | |
ebb9e16f JB |
2300 | PROCESS may be a process, a buffer, the name of a process or buffer, or\n\ |
2301 | nil, indicating the current buffer's process.\n\ | |
d0d6b7c5 JB |
2302 | Called from program, takes three arguments, PROCESS, START and END.\n\ |
2303 | If the region is more than 500 characters long,\n\ | |
2304 | it is sent in several bunches. This may happen even for shorter regions.\n\ | |
2305 | Output from processes can arrive in between bunches.") | |
2306 | (process, start, end) | |
2307 | Lisp_Object process, start, end; | |
2308 | { | |
2309 | Lisp_Object proc; | |
2310 | int start1; | |
2311 | ||
2312 | proc = get_process (process); | |
2313 | validate_region (&start, &end); | |
2314 | ||
2315 | if (XINT (start) < GPT && XINT (end) > GPT) | |
2316 | move_gap (start); | |
2317 | ||
2318 | start1 = XINT (start); | |
2319 | send_process (proc, &FETCH_CHAR (start1), XINT (end) - XINT (start)); | |
2320 | ||
2321 | return Qnil; | |
2322 | } | |
2323 | ||
2324 | DEFUN ("process-send-string", Fprocess_send_string, Sprocess_send_string, | |
2325 | 2, 2, 0, | |
2326 | "Send PROCESS the contents of STRING as input.\n\ | |
ebb9e16f JB |
2327 | PROCESS may be a process, a buffer, the name of a process or buffer, or\n\ |
2328 | nil, indicating the current buffer's process.\n\ | |
d0d6b7c5 JB |
2329 | If STRING is more than 500 characters long,\n\ |
2330 | it is sent in several bunches. This may happen even for shorter strings.\n\ | |
2331 | Output from processes can arrive in between bunches.") | |
2332 | (process, string) | |
2333 | Lisp_Object process, string; | |
2334 | { | |
2335 | Lisp_Object proc; | |
2336 | CHECK_STRING (string, 1); | |
2337 | proc = get_process (process); | |
2338 | send_process (proc, XSTRING (string)->data, XSTRING (string)->size); | |
2339 | return Qnil; | |
2340 | } | |
2341 | \f | |
2342 | /* send a signal number SIGNO to PROCESS. | |
2343 | CURRENT_GROUP means send to the process group that currently owns | |
2344 | the terminal being used to communicate with PROCESS. | |
2345 | This is used for various commands in shell mode. | |
2346 | If NOMSG is zero, insert signal-announcements into process's buffers | |
b0310da4 JB |
2347 | right away. |
2348 | ||
2349 | If we can, we try to signal PROCESS by sending control characters | |
2350 | down the pipe. This allows us to signal inferiors who have changed | |
2351 | their uid, for which killpg would return an EPERM error. */ | |
d0d6b7c5 | 2352 | |
f9738840 | 2353 | static void |
d0d6b7c5 JB |
2354 | process_send_signal (process, signo, current_group, nomsg) |
2355 | Lisp_Object process; | |
2356 | int signo; | |
2357 | Lisp_Object current_group; | |
2358 | int nomsg; | |
2359 | { | |
2360 | Lisp_Object proc; | |
2361 | register struct Lisp_Process *p; | |
2362 | int gid; | |
2363 | int no_pgrp = 0; | |
2364 | ||
2365 | proc = get_process (process); | |
2366 | p = XPROCESS (proc); | |
2367 | ||
2368 | if (!EQ (p->childp, Qt)) | |
2369 | error ("Process %s is not a subprocess", | |
2370 | XSTRING (p->name)->data); | |
a9f2c884 | 2371 | if (XINT (p->infd) < 0) |
d0d6b7c5 JB |
2372 | error ("Process %s is not active", |
2373 | XSTRING (p->name)->data); | |
2374 | ||
2375 | if (NILP (p->pty_flag)) | |
2376 | current_group = Qnil; | |
2377 | ||
d0d6b7c5 JB |
2378 | /* If we are using pgrps, get a pgrp number and make it negative. */ |
2379 | if (!NILP (current_group)) | |
2380 | { | |
b0310da4 | 2381 | #ifdef SIGNALS_VIA_CHARACTERS |
d0d6b7c5 JB |
2382 | /* If possible, send signals to the entire pgrp |
2383 | by sending an input character to it. */ | |
b0310da4 | 2384 | |
6be429b1 JB |
2385 | /* TERMIOS is the latest and bestest, and seems most likely to |
2386 | work. If the system has it, use it. */ | |
2387 | #ifdef HAVE_TERMIOS | |
2388 | struct termios t; | |
2389 | ||
2390 | switch (signo) | |
2391 | { | |
2392 | case SIGINT: | |
a9f2c884 | 2393 | tcgetattr (XINT (p->infd), &t); |
6be429b1 | 2394 | send_process (proc, &t.c_cc[VINTR], 1); |
a87b802f | 2395 | return; |
6be429b1 JB |
2396 | |
2397 | case SIGQUIT: | |
a9f2c884 | 2398 | tcgetattr (XINT (p->infd), &t); |
6be429b1 | 2399 | send_process (proc, &t.c_cc[VQUIT], 1); |
a87b802f | 2400 | return; |
6be429b1 JB |
2401 | |
2402 | case SIGTSTP: | |
a9f2c884 | 2403 | tcgetattr (XINT (p->infd), &t); |
c14e53a4 | 2404 | #if defined (VSWTCH) && !defined (IRIX5) |
6be429b1 JB |
2405 | send_process (proc, &t.c_cc[VSWTCH], 1); |
2406 | #else | |
2407 | send_process (proc, &t.c_cc[VSUSP], 1); | |
2408 | #endif | |
a87b802f | 2409 | return; |
6be429b1 JB |
2410 | } |
2411 | ||
2412 | #else /* ! HAVE_TERMIOS */ | |
2413 | ||
b0310da4 JB |
2414 | /* On Berkeley descendants, the following IOCTL's retrieve the |
2415 | current control characters. */ | |
d0d6b7c5 | 2416 | #if defined (TIOCGLTC) && defined (TIOCGETC) |
b0310da4 | 2417 | |
d0d6b7c5 JB |
2418 | struct tchars c; |
2419 | struct ltchars lc; | |
2420 | ||
2421 | switch (signo) | |
2422 | { | |
2423 | case SIGINT: | |
a9f2c884 | 2424 | ioctl (XINT (p->infd), TIOCGETC, &c); |
d0d6b7c5 | 2425 | send_process (proc, &c.t_intrc, 1); |
f9738840 | 2426 | return; |
d0d6b7c5 | 2427 | case SIGQUIT: |
a9f2c884 | 2428 | ioctl (XINT (p->infd), TIOCGETC, &c); |
d0d6b7c5 | 2429 | send_process (proc, &c.t_quitc, 1); |
f9738840 | 2430 | return; |
0ad77c54 | 2431 | #ifdef SIGTSTP |
d0d6b7c5 | 2432 | case SIGTSTP: |
a9f2c884 | 2433 | ioctl (XINT (p->infd), TIOCGLTC, &lc); |
d0d6b7c5 | 2434 | send_process (proc, &lc.t_suspc, 1); |
f9738840 | 2435 | return; |
b0310da4 | 2436 | #endif /* ! defined (SIGTSTP) */ |
d0d6b7c5 | 2437 | } |
b0310da4 JB |
2438 | |
2439 | #else /* ! defined (TIOCGLTC) && defined (TIOCGETC) */ | |
2440 | ||
2441 | /* On SYSV descendants, the TCGETA ioctl retrieves the current control | |
2442 | characters. */ | |
2443 | #ifdef TCGETA | |
d0d6b7c5 JB |
2444 | struct termio t; |
2445 | switch (signo) | |
2446 | { | |
2447 | case SIGINT: | |
a9f2c884 | 2448 | ioctl (XINT (p->infd), TCGETA, &t); |
d0d6b7c5 | 2449 | send_process (proc, &t.c_cc[VINTR], 1); |
f9738840 | 2450 | return; |
d0d6b7c5 | 2451 | case SIGQUIT: |
a9f2c884 | 2452 | ioctl (XINT (p->infd), TCGETA, &t); |
d0d6b7c5 | 2453 | send_process (proc, &t.c_cc[VQUIT], 1); |
f9738840 | 2454 | return; |
7d79e3b4 | 2455 | #ifdef SIGTSTP |
d0d6b7c5 | 2456 | case SIGTSTP: |
a9f2c884 | 2457 | ioctl (XINT (p->infd), TCGETA, &t); |
d0d6b7c5 | 2458 | send_process (proc, &t.c_cc[VSWTCH], 1); |
f9738840 | 2459 | return; |
b0310da4 | 2460 | #endif /* ! defined (SIGTSTP) */ |
d0d6b7c5 | 2461 | } |
b0310da4 JB |
2462 | #else /* ! defined (TCGETA) */ |
2463 | Your configuration files are messed up. | |
2464 | /* If your system configuration files define SIGNALS_VIA_CHARACTERS, | |
2465 | you'd better be using one of the alternatives above! */ | |
2466 | #endif /* ! defined (TCGETA) */ | |
2467 | #endif /* ! defined (TIOCGLTC) && defined (TIOCGETC) */ | |
6be429b1 | 2468 | #endif /* ! defined HAVE_TERMIOS */ |
b0310da4 | 2469 | #endif /* ! defined (SIGNALS_VIA_CHARACTERS) */ |
d0d6b7c5 | 2470 | |
301c3fe4 | 2471 | #ifdef TIOCGPGRP |
d0d6b7c5 JB |
2472 | /* Get the pgrp using the tty itself, if we have that. |
2473 | Otherwise, use the pty to get the pgrp. | |
2474 | On pfa systems, saka@pfu.fujitsu.co.JP writes: | |
b0310da4 JB |
2475 | "TIOCGPGRP symbol defined in sys/ioctl.h at E50. |
2476 | But, TIOCGPGRP does not work on E50 ;-P works fine on E60" | |
d0d6b7c5 JB |
2477 | His patch indicates that if TIOCGPGRP returns an error, then |
2478 | we should just assume that p->pid is also the process group id. */ | |
2479 | { | |
2480 | int err; | |
2481 | ||
2482 | if (!NILP (p->subtty)) | |
2483 | err = ioctl (XFASTINT (p->subtty), TIOCGPGRP, &gid); | |
2484 | else | |
a9f2c884 | 2485 | err = ioctl (XINT (p->infd), TIOCGPGRP, &gid); |
d0d6b7c5 JB |
2486 | |
2487 | #ifdef pfa | |
2488 | if (err == -1) | |
2489 | gid = - XFASTINT (p->pid); | |
301c3fe4 | 2490 | #endif /* ! defined (pfa) */ |
d0d6b7c5 JB |
2491 | } |
2492 | if (gid == -1) | |
2493 | no_pgrp = 1; | |
2494 | else | |
2495 | gid = - gid; | |
b0310da4 | 2496 | #else /* ! defined (TIOCGPGRP ) */ |
301c3fe4 JB |
2497 | /* Can't select pgrps on this system, so we know that |
2498 | the child itself heads the pgrp. */ | |
2499 | gid = - XFASTINT (p->pid); | |
2500 | #endif /* ! defined (TIOCGPGRP ) */ | |
d0d6b7c5 JB |
2501 | } |
2502 | else | |
2503 | gid = - XFASTINT (p->pid); | |
d0d6b7c5 JB |
2504 | |
2505 | switch (signo) | |
2506 | { | |
2507 | #ifdef SIGCONT | |
2508 | case SIGCONT: | |
2509 | p->raw_status_low = Qnil; | |
2510 | p->raw_status_high = Qnil; | |
2511 | p->status = Qrun; | |
2512 | XSETINT (p->tick, ++process_tick); | |
2513 | if (!nomsg) | |
2514 | status_notify (); | |
2515 | break; | |
301c3fe4 | 2516 | #endif /* ! defined (SIGCONT) */ |
d0d6b7c5 JB |
2517 | case SIGINT: |
2518 | #ifdef VMS | |
2519 | send_process (proc, "\003", 1); /* ^C */ | |
2520 | goto whoosh; | |
2521 | #endif | |
2522 | case SIGQUIT: | |
2523 | #ifdef VMS | |
2524 | send_process (proc, "\031", 1); /* ^Y */ | |
2525 | goto whoosh; | |
2526 | #endif | |
2527 | case SIGKILL: | |
2528 | #ifdef VMS | |
2529 | sys$forcex (&(XFASTINT (p->pid)), 0, 1); | |
2530 | whoosh: | |
2531 | #endif | |
a9f2c884 | 2532 | flush_pending_output (XINT (p->infd)); |
d0d6b7c5 JB |
2533 | break; |
2534 | } | |
2535 | ||
2536 | /* If we don't have process groups, send the signal to the immediate | |
2537 | subprocess. That isn't really right, but it's better than any | |
2538 | obvious alternative. */ | |
2539 | if (no_pgrp) | |
2540 | { | |
2541 | kill (XFASTINT (p->pid), signo); | |
2542 | return; | |
2543 | } | |
2544 | ||
2545 | /* gid may be a pid, or minus a pgrp's number */ | |
2546 | #ifdef TIOCSIGSEND | |
2547 | if (!NILP (current_group)) | |
a9f2c884 | 2548 | ioctl (XINT (p->infd), TIOCSIGSEND, signo); |
d0d6b7c5 JB |
2549 | else |
2550 | { | |
2551 | gid = - XFASTINT (p->pid); | |
2552 | kill (gid, signo); | |
2553 | } | |
301c3fe4 | 2554 | #else /* ! defined (TIOCSIGSEND) */ |
d0d6b7c5 | 2555 | EMACS_KILLPG (-gid, signo); |
301c3fe4 | 2556 | #endif /* ! defined (TIOCSIGSEND) */ |
d0d6b7c5 JB |
2557 | } |
2558 | ||
2559 | DEFUN ("interrupt-process", Finterrupt_process, Sinterrupt_process, 0, 2, 0, | |
2560 | "Interrupt process PROCESS. May be process or name of one.\n\ | |
ebb9e16f | 2561 | PROCESS may be a process, a buffer, or the name of a process or buffer.\n\ |
d0d6b7c5 JB |
2562 | Nil or no arg means current buffer's process.\n\ |
2563 | Second arg CURRENT-GROUP non-nil means send signal to\n\ | |
2564 | the current process-group of the process's controlling terminal\n\ | |
2565 | rather than to the process's own process group.\n\ | |
2566 | If the process is a shell, this means interrupt current subjob\n\ | |
2567 | rather than the shell.") | |
2568 | (process, current_group) | |
2569 | Lisp_Object process, current_group; | |
2570 | { | |
2571 | process_send_signal (process, SIGINT, current_group, 0); | |
2572 | return process; | |
2573 | } | |
2574 | ||
2575 | DEFUN ("kill-process", Fkill_process, Skill_process, 0, 2, 0, | |
2576 | "Kill process PROCESS. May be process or name of one.\n\ | |
2577 | See function `interrupt-process' for more details on usage.") | |
2578 | (process, current_group) | |
2579 | Lisp_Object process, current_group; | |
2580 | { | |
2581 | process_send_signal (process, SIGKILL, current_group, 0); | |
2582 | return process; | |
2583 | } | |
2584 | ||
2585 | DEFUN ("quit-process", Fquit_process, Squit_process, 0, 2, 0, | |
2586 | "Send QUIT signal to process PROCESS. May be process or name of one.\n\ | |
2587 | See function `interrupt-process' for more details on usage.") | |
2588 | (process, current_group) | |
2589 | Lisp_Object process, current_group; | |
2590 | { | |
2591 | process_send_signal (process, SIGQUIT, current_group, 0); | |
2592 | return process; | |
2593 | } | |
2594 | ||
2595 | DEFUN ("stop-process", Fstop_process, Sstop_process, 0, 2, 0, | |
2596 | "Stop process PROCESS. May be process or name of one.\n\ | |
2597 | See function `interrupt-process' for more details on usage.") | |
2598 | (process, current_group) | |
2599 | Lisp_Object process, current_group; | |
2600 | { | |
2601 | #ifndef SIGTSTP | |
2602 | error ("no SIGTSTP support"); | |
2603 | #else | |
2604 | process_send_signal (process, SIGTSTP, current_group, 0); | |
2605 | #endif | |
2606 | return process; | |
2607 | } | |
2608 | ||
2609 | DEFUN ("continue-process", Fcontinue_process, Scontinue_process, 0, 2, 0, | |
2610 | "Continue process PROCESS. May be process or name of one.\n\ | |
2611 | See function `interrupt-process' for more details on usage.") | |
2612 | (process, current_group) | |
2613 | Lisp_Object process, current_group; | |
2614 | { | |
2615 | #ifdef SIGCONT | |
2616 | process_send_signal (process, SIGCONT, current_group, 0); | |
2617 | #else | |
2618 | error ("no SIGCONT support"); | |
2619 | #endif | |
2620 | return process; | |
2621 | } | |
2622 | ||
2623 | DEFUN ("signal-process", Fsignal_process, Ssignal_process, | |
2624 | 2, 2, "nProcess number: \nnSignal code: ", | |
2625 | "Send the process with number PID the signal with code CODE.\n\ | |
2626 | Both PID and CODE are integers.") | |
2627 | (pid, sig) | |
2628 | Lisp_Object pid, sig; | |
2629 | { | |
2630 | CHECK_NUMBER (pid, 0); | |
2631 | CHECK_NUMBER (sig, 1); | |
2632 | return make_number (kill (XINT (pid), XINT (sig))); | |
2633 | } | |
2634 | ||
2635 | DEFUN ("process-send-eof", Fprocess_send_eof, Sprocess_send_eof, 0, 1, 0, | |
2636 | "Make PROCESS see end-of-file in its input.\n\ | |
2637 | Eof comes after any text already sent to it.\n\ | |
ebb9e16f JB |
2638 | PROCESS may be a process, a buffer, the name of a process or buffer, or\n\ |
2639 | nil, indicating the current buffer's process.") | |
d0d6b7c5 JB |
2640 | (process) |
2641 | Lisp_Object process; | |
2642 | { | |
2643 | Lisp_Object proc; | |
2644 | ||
2645 | proc = get_process (process); | |
577d03d5 RS |
2646 | |
2647 | /* Make sure the process is really alive. */ | |
2648 | if (! NILP (XPROCESS (proc)->raw_status_low)) | |
2649 | update_status (XPROCESS (proc)); | |
2650 | if (! EQ (XPROCESS (proc)->status, Qrun)) | |
dcf970e6 | 2651 | error ("Process %s not running", XSTRING (XPROCESS (proc)->name)->data); |
577d03d5 | 2652 | |
d0d6b7c5 JB |
2653 | /* Sending a zero-length record is supposed to mean eof |
2654 | when TIOCREMOTE is turned on. */ | |
2655 | #ifdef DID_REMOTE | |
2656 | { | |
2657 | char buf[1]; | |
a9f2c884 | 2658 | write (XINT (XPROCESS (proc)->outfd), buf, 0); |
d0d6b7c5 JB |
2659 | } |
2660 | #else /* did not do TOICREMOTE */ | |
2661 | #ifdef VMS | |
2662 | send_process (proc, "\032", 1); /* ^z */ | |
2663 | #else | |
2664 | if (!NILP (XPROCESS (proc)->pty_flag)) | |
2665 | send_process (proc, "\004", 1); | |
2666 | else | |
2667 | { | |
a9f2c884 RS |
2668 | close (XINT (XPROCESS (proc)->outfd)); |
2669 | XSET (XPROCESS (proc)->outfd, Lisp_Int, open (NULL_DEVICE, O_WRONLY)); | |
d0d6b7c5 JB |
2670 | } |
2671 | #endif /* VMS */ | |
2672 | #endif /* did not do TOICREMOTE */ | |
2673 | return process; | |
2674 | } | |
2675 | ||
2676 | /* Kill all processes associated with `buffer'. | |
2677 | If `buffer' is nil, kill all processes */ | |
2678 | ||
2679 | kill_buffer_processes (buffer) | |
2680 | Lisp_Object buffer; | |
2681 | { | |
2682 | Lisp_Object tail, proc; | |
2683 | ||
2684 | for (tail = Vprocess_alist; XGCTYPE (tail) == Lisp_Cons; | |
2685 | tail = XCONS (tail)->cdr) | |
2686 | { | |
2687 | proc = XCONS (XCONS (tail)->car)->cdr; | |
2688 | if (XGCTYPE (proc) == Lisp_Process | |
2689 | && (NILP (buffer) || EQ (XPROCESS (proc)->buffer, buffer))) | |
2690 | { | |
2691 | if (NETCONN_P (proc)) | |
2692 | deactivate_process (proc); | |
a9f2c884 | 2693 | else if (XINT (XPROCESS (proc)->infd) >= 0) |
d0d6b7c5 JB |
2694 | process_send_signal (proc, SIGHUP, Qnil, 1); |
2695 | } | |
2696 | } | |
2697 | } | |
2698 | \f | |
2699 | /* On receipt of a signal that a child status has changed, | |
2700 | loop asking about children with changed statuses until | |
2701 | the system says there are no more. | |
2702 | All we do is change the status; | |
2703 | we do not run sentinels or print notifications. | |
2704 | That is saved for the next time keyboard input is done, | |
2705 | in order to avoid timing errors. */ | |
2706 | ||
2707 | /** WARNING: this can be called during garbage collection. | |
2708 | Therefore, it must not be fooled by the presence of mark bits in | |
2709 | Lisp objects. */ | |
2710 | ||
2711 | /** USG WARNING: Although it is not obvious from the documentation | |
2712 | in signal(2), on a USG system the SIGCLD handler MUST NOT call | |
2713 | signal() before executing at least one wait(), otherwise the handler | |
2714 | will be called again, resulting in an infinite loop. The relevant | |
2715 | portion of the documentation reads "SIGCLD signals will be queued | |
2716 | and the signal-catching function will be continually reentered until | |
2717 | the queue is empty". Invoking signal() causes the kernel to reexamine | |
2718 | the SIGCLD queue. Fred Fish, UniSoft Systems Inc. */ | |
2719 | ||
2720 | SIGTYPE | |
2721 | sigchld_handler (signo) | |
2722 | int signo; | |
2723 | { | |
2724 | int old_errno = errno; | |
2725 | Lisp_Object proc; | |
2726 | register struct Lisp_Process *p; | |
6be429b1 | 2727 | extern EMACS_TIME *input_available_clear_time; |
d0d6b7c5 JB |
2728 | |
2729 | #ifdef BSD4_1 | |
2730 | extern int sigheld; | |
2731 | sigheld |= sigbit (SIGCHLD); | |
2732 | #endif | |
2733 | ||
2734 | while (1) | |
2735 | { | |
2736 | register int pid; | |
2737 | WAITTYPE w; | |
2738 | Lisp_Object tail; | |
2739 | ||
2740 | #ifdef WNOHANG | |
2741 | #ifndef WUNTRACED | |
2742 | #define WUNTRACED 0 | |
2743 | #endif /* no WUNTRACED */ | |
2744 | /* Keep trying to get a status until we get a definitive result. */ | |
2745 | do | |
2746 | { | |
2747 | errno = 0; | |
2748 | pid = wait3 (&w, WNOHANG | WUNTRACED, 0); | |
2749 | } | |
2750 | while (pid <= 0 && errno == EINTR); | |
2751 | ||
2752 | if (pid <= 0) | |
2753 | { | |
2754 | /* A real failure. We have done all our job, so return. */ | |
2755 | ||
2756 | /* USG systems forget handlers when they are used; | |
2757 | must reestablish each time */ | |
2758 | #ifdef USG | |
2759 | signal (signo, sigchld_handler); /* WARNING - must come after wait3() */ | |
2760 | #endif | |
2761 | #ifdef BSD4_1 | |
2762 | sigheld &= ~sigbit (SIGCHLD); | |
2763 | sigrelse (SIGCHLD); | |
2764 | #endif | |
2765 | errno = old_errno; | |
2766 | return; | |
2767 | } | |
2768 | #else | |
2769 | pid = wait (&w); | |
2770 | #endif /* no WNOHANG */ | |
2771 | ||
2772 | /* Find the process that signaled us, and record its status. */ | |
2773 | ||
2774 | p = 0; | |
2775 | for (tail = Vprocess_alist; XSYMBOL (tail) != XSYMBOL (Qnil); tail = XCONS (tail)->cdr) | |
2776 | { | |
2777 | proc = XCONS (XCONS (tail)->car)->cdr; | |
2778 | p = XPROCESS (proc); | |
2779 | if (EQ (p->childp, Qt) && XFASTINT (p->pid) == pid) | |
2780 | break; | |
2781 | p = 0; | |
2782 | } | |
2783 | ||
2784 | /* Look for an asynchronous process whose pid hasn't been filled | |
2785 | in yet. */ | |
2786 | if (p == 0) | |
2787 | for (tail = Vprocess_alist; XSYMBOL (tail) != XSYMBOL (Qnil); tail = XCONS (tail)->cdr) | |
2788 | { | |
2789 | proc = XCONS (XCONS (tail)->car)->cdr; | |
2790 | p = XPROCESS (proc); | |
2791 | if (XTYPE (p->pid) == Lisp_Int && XINT (p->pid) == -1) | |
2792 | break; | |
2793 | p = 0; | |
2794 | } | |
2795 | ||
2796 | /* Change the status of the process that was found. */ | |
2797 | if (p != 0) | |
2798 | { | |
2799 | union { int i; WAITTYPE wt; } u; | |
2800 | ||
2801 | XSETINT (p->tick, ++process_tick); | |
2802 | u.wt = w; | |
2803 | XFASTINT (p->raw_status_low) = u.i & 0xffff; | |
2804 | XFASTINT (p->raw_status_high) = u.i >> 16; | |
2805 | ||
2806 | /* If process has terminated, stop waiting for its output. */ | |
2807 | if (WIFSIGNALED (w) || WIFEXITED (w)) | |
a9f2c884 RS |
2808 | if (XINT (p->infd) >= 0) |
2809 | FD_CLR (XINT (p->infd), &input_wait_mask); | |
6be429b1 JB |
2810 | |
2811 | /* Tell wait_reading_process_input that it needs to wake up and | |
2812 | look around. */ | |
2813 | if (input_available_clear_time) | |
2814 | EMACS_SET_SECS_USECS (*input_available_clear_time, 0, 0); | |
d0d6b7c5 JB |
2815 | } |
2816 | ||
2817 | /* There was no asynchronous process found for that id. Check | |
2818 | if we have a synchronous process. */ | |
2819 | else | |
2820 | { | |
2821 | synch_process_alive = 0; | |
2822 | ||
2823 | /* Report the status of the synchronous process. */ | |
2824 | if (WIFEXITED (w)) | |
2825 | synch_process_retcode = WRETCODE (w); | |
2826 | else if (WIFSIGNALED (w)) | |
b0310da4 | 2827 | #ifndef VMS |
95e8068d | 2828 | synch_process_death = (char *) sys_siglist[WTERMSIG (w)]; |
b0310da4 JB |
2829 | #else |
2830 | synch_process_death = sys_errlist[WTERMSIG (w)]; | |
2831 | #endif | |
6be429b1 JB |
2832 | |
2833 | /* Tell wait_reading_process_input that it needs to wake up and | |
2834 | look around. */ | |
2835 | if (input_available_clear_time) | |
2836 | EMACS_SET_SECS_USECS (*input_available_clear_time, 0, 0); | |
d0d6b7c5 JB |
2837 | } |
2838 | ||
2839 | /* On some systems, we must return right away. | |
2840 | If any more processes want to signal us, we will | |
2841 | get another signal. | |
2842 | Otherwise (on systems that have WNOHANG), loop around | |
2843 | to use up all the processes that have something to tell us. */ | |
2844 | #if defined (USG) && ! (defined (HPUX) && defined (WNOHANG)) | |
2845 | #ifdef USG | |
2846 | signal (signo, sigchld_handler); | |
2847 | #endif | |
2848 | errno = old_errno; | |
2849 | return; | |
2850 | #endif /* USG, but not HPUX with WNOHANG */ | |
2851 | } | |
2852 | } | |
2853 | \f | |
2854 | ||
2855 | static Lisp_Object | |
2856 | exec_sentinel_unwind (data) | |
2857 | Lisp_Object data; | |
2858 | { | |
2859 | XPROCESS (XCONS (data)->car)->sentinel = XCONS (data)->cdr; | |
2860 | return Qnil; | |
2861 | } | |
2862 | ||
2863 | static void | |
2864 | exec_sentinel (proc, reason) | |
2865 | Lisp_Object proc, reason; | |
2866 | { | |
2867 | Lisp_Object sentinel; | |
2868 | register struct Lisp_Process *p = XPROCESS (proc); | |
2869 | int count = specpdl_ptr - specpdl; | |
2870 | ||
2871 | sentinel = p->sentinel; | |
2872 | if (NILP (sentinel)) | |
2873 | return; | |
2874 | ||
2875 | /* Zilch the sentinel while it's running, to avoid recursive invocations; | |
2876 | assure that it gets restored no matter how the sentinel exits. */ | |
2877 | p->sentinel = Qnil; | |
2878 | record_unwind_protect (exec_sentinel_unwind, Fcons (proc, sentinel)); | |
2879 | /* Inhibit quit so that random quits don't screw up a running filter. */ | |
2880 | specbind (Qinhibit_quit, Qt); | |
2881 | call2 (sentinel, proc, reason); | |
2882 | unbind_to (count); | |
2883 | } | |
2884 | ||
2885 | /* Report all recent events of a change in process status | |
2886 | (either run the sentinel or output a message). | |
2887 | This is done while Emacs is waiting for keyboard input. */ | |
2888 | ||
2889 | status_notify () | |
2890 | { | |
2891 | register Lisp_Object proc, buffer; | |
2892 | Lisp_Object tail = Qnil; | |
2893 | Lisp_Object msg = Qnil; | |
2894 | struct gcpro gcpro1, gcpro2; | |
2895 | ||
2896 | /* We need to gcpro tail; if read_process_output calls a filter | |
2897 | which deletes a process and removes the cons to which tail points | |
2898 | from Vprocess_alist, and then causes a GC, tail is an unprotected | |
2899 | reference. */ | |
2900 | GCPRO2 (tail, msg); | |
2901 | ||
2902 | for (tail = Vprocess_alist; !NILP (tail); tail = Fcdr (tail)) | |
2903 | { | |
2904 | Lisp_Object symbol; | |
2905 | register struct Lisp_Process *p; | |
2906 | ||
2907 | proc = Fcdr (Fcar (tail)); | |
2908 | p = XPROCESS (proc); | |
2909 | ||
2910 | if (XINT (p->tick) != XINT (p->update_tick)) | |
2911 | { | |
2912 | XSETINT (p->update_tick, XINT (p->tick)); | |
2913 | ||
2914 | /* If process is still active, read any output that remains. */ | |
a9f2c884 | 2915 | if (XINT (p->infd) >= 0) |
20ddfff7 | 2916 | while (! EQ (p->filter, Qt) |
a9f2c884 | 2917 | && read_process_output (proc, XINT (p->infd)) > 0); |
d0d6b7c5 JB |
2918 | |
2919 | buffer = p->buffer; | |
2920 | ||
2921 | /* Get the text to use for the message. */ | |
2922 | if (!NILP (p->raw_status_low)) | |
2923 | update_status (p); | |
2924 | msg = status_message (p->status); | |
2925 | ||
2926 | /* If process is terminated, deactivate it or delete it. */ | |
2927 | symbol = p->status; | |
2928 | if (XTYPE (p->status) == Lisp_Cons) | |
2929 | symbol = XCONS (p->status)->car; | |
2930 | ||
2931 | if (EQ (symbol, Qsignal) || EQ (symbol, Qexit) | |
2932 | || EQ (symbol, Qclosed)) | |
2933 | { | |
2934 | if (delete_exited_processes) | |
2935 | remove_process (proc); | |
2936 | else | |
2937 | deactivate_process (proc); | |
2938 | } | |
2939 | ||
2940 | /* Now output the message suitably. */ | |
2941 | if (!NILP (p->sentinel)) | |
2942 | exec_sentinel (proc, msg); | |
2943 | /* Don't bother with a message in the buffer | |
2944 | when a process becomes runnable. */ | |
2945 | else if (!EQ (symbol, Qrun) && !NILP (buffer)) | |
2946 | { | |
2947 | Lisp_Object ro = XBUFFER (buffer)->read_only; | |
2948 | Lisp_Object tem; | |
2949 | struct buffer *old = current_buffer; | |
2950 | int opoint; | |
2951 | ||
2952 | /* Avoid error if buffer is deleted | |
2953 | (probably that's why the process is dead, too) */ | |
2954 | if (NILP (XBUFFER (buffer)->name)) | |
2955 | continue; | |
2956 | Fset_buffer (buffer); | |
2957 | opoint = point; | |
2958 | /* Insert new output into buffer | |
2959 | at the current end-of-output marker, | |
2960 | thus preserving logical ordering of input and output. */ | |
2961 | if (XMARKER (p->mark)->buffer) | |
2962 | SET_PT (marker_position (p->mark)); | |
2963 | else | |
2964 | SET_PT (ZV); | |
2965 | if (point <= opoint) | |
2966 | opoint += XSTRING (msg)->size + XSTRING (p->name)->size + 10; | |
2967 | ||
2968 | tem = current_buffer->read_only; | |
2969 | current_buffer->read_only = Qnil; | |
2970 | insert_string ("\nProcess "); | |
2971 | Finsert (1, &p->name); | |
2972 | insert_string (" "); | |
2973 | Finsert (1, &msg); | |
2974 | current_buffer->read_only = tem; | |
2975 | Fset_marker (p->mark, make_number (point), p->buffer); | |
2976 | ||
2977 | SET_PT (opoint); | |
2978 | set_buffer_internal (old); | |
2979 | } | |
2980 | } | |
2981 | } /* end for */ | |
2982 | ||
2983 | update_mode_lines++; /* in case buffers use %s in mode-line-format */ | |
2984 | redisplay_preserve_echo_area (); | |
2985 | ||
2986 | update_tick = process_tick; | |
2987 | ||
2988 | UNGCPRO; | |
2989 | } | |
2990 | \f | |
2991 | init_process () | |
2992 | { | |
2993 | register int i; | |
2994 | ||
2995 | #ifdef SIGCHLD | |
2996 | #ifndef CANNOT_DUMP | |
2997 | if (! noninteractive || initialized) | |
2998 | #endif | |
2999 | signal (SIGCHLD, sigchld_handler); | |
3000 | #endif | |
3001 | ||
3002 | FD_ZERO (&input_wait_mask); | |
dd2281ae RS |
3003 | |
3004 | keyboard_descriptor = 0; | |
3005 | FD_SET (keyboard_descriptor, &input_wait_mask); | |
3006 | ||
d0d6b7c5 JB |
3007 | Vprocess_alist = Qnil; |
3008 | for (i = 0; i < MAXDESC; i++) | |
3009 | { | |
3010 | chan_process[i] = Qnil; | |
3011 | proc_buffered_char[i] = -1; | |
3012 | } | |
3013 | } | |
312c9964 | 3014 | |
dd2281ae RS |
3015 | /* From now on, assume keyboard input comes from descriptor DESC. */ |
3016 | ||
3017 | void | |
3018 | change_keyboard_wait_descriptor (desc) | |
3019 | int desc; | |
3020 | { | |
3021 | FD_CLR (keyboard_descriptor, &input_wait_mask); | |
3022 | keyboard_descriptor = desc; | |
3023 | FD_SET (keyboard_descriptor, &input_wait_mask); | |
3024 | } | |
3025 | ||
d0d6b7c5 JB |
3026 | syms_of_process () |
3027 | { | |
d0d6b7c5 JB |
3028 | #ifdef HAVE_SOCKETS |
3029 | stream_process = intern ("stream"); | |
3030 | #endif | |
3031 | Qprocessp = intern ("processp"); | |
3032 | staticpro (&Qprocessp); | |
3033 | Qrun = intern ("run"); | |
3034 | staticpro (&Qrun); | |
3035 | Qstop = intern ("stop"); | |
3036 | staticpro (&Qstop); | |
3037 | Qsignal = intern ("signal"); | |
3038 | staticpro (&Qsignal); | |
3039 | ||
3040 | /* Qexit is already staticpro'd by syms_of_eval; don't staticpro it | |
3041 | here again. | |
3042 | ||
3043 | Qexit = intern ("exit"); | |
3044 | staticpro (&Qexit); */ | |
3045 | ||
3046 | Qopen = intern ("open"); | |
3047 | staticpro (&Qopen); | |
3048 | Qclosed = intern ("closed"); | |
3049 | staticpro (&Qclosed); | |
3050 | ||
3051 | staticpro (&Vprocess_alist); | |
3052 | ||
3053 | DEFVAR_BOOL ("delete-exited-processes", &delete_exited_processes, | |
3054 | "*Non-nil means delete processes immediately when they exit.\n\ | |
3055 | nil means don't delete them until `list-processes' is run."); | |
3056 | ||
3057 | delete_exited_processes = 1; | |
3058 | ||
3059 | DEFVAR_LISP ("process-connection-type", &Vprocess_connection_type, | |
3060 | "Control type of device used to communicate with subprocesses.\n\ | |
3061 | Values are nil to use a pipe, and t or 'pty for a pty. Note that if\n\ | |
3062 | pty's are not available, this variable will be ignored. The value takes\n\ | |
3063 | effect when `start-process' is called."); | |
3064 | Vprocess_connection_type = Qt; | |
3065 | ||
3066 | defsubr (&Sprocessp); | |
3067 | defsubr (&Sget_process); | |
3068 | defsubr (&Sget_buffer_process); | |
3069 | defsubr (&Sdelete_process); | |
3070 | defsubr (&Sprocess_status); | |
3071 | defsubr (&Sprocess_exit_status); | |
3072 | defsubr (&Sprocess_id); | |
3073 | defsubr (&Sprocess_name); | |
3074 | defsubr (&Sprocess_command); | |
3075 | defsubr (&Sset_process_buffer); | |
3076 | defsubr (&Sprocess_buffer); | |
3077 | defsubr (&Sprocess_mark); | |
3078 | defsubr (&Sset_process_filter); | |
3079 | defsubr (&Sprocess_filter); | |
3080 | defsubr (&Sset_process_sentinel); | |
3081 | defsubr (&Sprocess_sentinel); | |
3082 | defsubr (&Sprocess_kill_without_query); | |
3083 | defsubr (&Slist_processes); | |
3084 | defsubr (&Sprocess_list); | |
3085 | defsubr (&Sstart_process); | |
3086 | #ifdef HAVE_SOCKETS | |
3087 | defsubr (&Sopen_network_stream); | |
3088 | #endif /* HAVE_SOCKETS */ | |
3089 | defsubr (&Saccept_process_output); | |
3090 | defsubr (&Sprocess_send_region); | |
3091 | defsubr (&Sprocess_send_string); | |
3092 | defsubr (&Sinterrupt_process); | |
3093 | defsubr (&Skill_process); | |
3094 | defsubr (&Squit_process); | |
3095 | defsubr (&Sstop_process); | |
3096 | defsubr (&Scontinue_process); | |
3097 | defsubr (&Sprocess_send_eof); | |
3098 | defsubr (&Ssignal_process); | |
3099 | defsubr (&Swaiting_for_user_input_p); | |
3100 | /* defsubr (&Sprocess_connection); */ | |
3101 | } | |
3102 | ||
6720a7fb JB |
3103 | \f |
3104 | #else /* not subprocesses */ | |
3105 | ||
3106 | #include <sys/types.h> | |
3107 | #include <errno.h> | |
3108 | ||
3109 | #include "lisp.h" | |
3110 | #include "systime.h" | |
3111 | #include "termopts.h" | |
3112 | ||
ff11dfa1 | 3113 | extern int frame_garbaged; |
6720a7fb JB |
3114 | |
3115 | ||
3116 | /* As described above, except assuming that there are no subprocesses: | |
3117 | ||
3118 | Wait for timeout to elapse and/or keyboard input to be available. | |
3119 | ||
3120 | time_limit is: | |
3121 | timeout in seconds, or | |
3122 | zero for no limit, or | |
3123 | -1 means gobble data immediately available but don't wait for any. | |
3124 | ||
f76475ad | 3125 | read_kbd is a Lisp_Object: |
6720a7fb JB |
3126 | 0 to ignore keyboard input, or |
3127 | 1 to return when input is available, or | |
3128 | -1 means caller will actually read the input, so don't throw to | |
3129 | the quit handler. | |
3130 | We know that read_kbd will never be a Lisp_Process, since | |
3131 | `subprocesses' isn't defined. | |
3132 | ||
3133 | do_display != 0 means redisplay should be done to show subprocess | |
3134 | output that arrives. This version of the function ignores it. | |
3135 | ||
eb8c3be9 | 3136 | Return true iff we received input from any process. */ |
6720a7fb JB |
3137 | |
3138 | int | |
3139 | wait_reading_process_input (time_limit, microsecs, read_kbd, do_display) | |
f76475ad JB |
3140 | int time_limit, microsecs; |
3141 | Lisp_Object read_kbd; | |
3142 | int do_display; | |
6720a7fb JB |
3143 | { |
3144 | EMACS_TIME end_time, timeout, *timeout_p; | |
3145 | int waitchannels; | |
3146 | ||
3147 | /* What does time_limit really mean? */ | |
3148 | if (time_limit || microsecs) | |
3149 | { | |
3150 | /* It's not infinite. */ | |
3151 | timeout_p = &timeout; | |
3152 | ||
3153 | if (time_limit == -1) | |
3154 | /* In fact, it's zero. */ | |
3155 | EMACS_SET_SECS_USECS (timeout, 0, 0); | |
3156 | else | |
3157 | EMACS_SET_SECS_USECS (timeout, time_limit, microsecs); | |
3158 | ||
3159 | /* How far in the future is that? */ | |
3160 | EMACS_GET_TIME (end_time); | |
3161 | EMACS_ADD_TIME (end_time, end_time, timeout); | |
3162 | } | |
3163 | else | |
3164 | /* It's infinite. */ | |
3165 | timeout_p = 0; | |
3166 | ||
99e3d726 RS |
3167 | /* This must come before stop_polling. */ |
3168 | prepare_menu_bars (); | |
3169 | ||
6720a7fb JB |
3170 | /* Turn off periodic alarms (in case they are in use) |
3171 | because the select emulator uses alarms. */ | |
3172 | stop_polling (); | |
3173 | ||
3174 | for (;;) | |
3175 | { | |
3176 | int nfds; | |
3177 | ||
f76475ad | 3178 | waitchannels = XINT (read_kbd) ? 1 : 0; |
6720a7fb JB |
3179 | |
3180 | /* If calling from keyboard input, do not quit | |
3181 | since we want to return C-g as an input character. | |
3182 | Otherwise, do pending quit if requested. */ | |
f76475ad | 3183 | if (XINT (read_kbd) >= 0) |
6720a7fb JB |
3184 | QUIT; |
3185 | ||
3186 | if (timeout_p) | |
3187 | { | |
3188 | EMACS_GET_TIME (*timeout_p); | |
3189 | EMACS_SUB_TIME (*timeout_p, end_time, *timeout_p); | |
3190 | if (EMACS_TIME_NEG_P (*timeout_p)) | |
3191 | break; | |
3192 | } | |
3193 | ||
3194 | /* Cause C-g and alarm signals to take immediate action, | |
3195 | and cause input available signals to zero out timeout. */ | |
f76475ad | 3196 | if (XINT (read_kbd) < 0) |
6720a7fb JB |
3197 | set_waiting_for_input (&timeout); |
3198 | ||
ff11dfa1 | 3199 | /* If a frame has been newly mapped and needs updating, |
6720a7fb | 3200 | reprocess its display stuff. */ |
ff11dfa1 | 3201 | if (frame_garbaged) |
6720a7fb JB |
3202 | redisplay_preserve_echo_area (); |
3203 | ||
f76475ad | 3204 | if (XINT (read_kbd) && detect_input_pending ()) |
6720a7fb JB |
3205 | nfds = 0; |
3206 | else | |
3207 | nfds = select (1, &waitchannels, 0, 0, timeout_p); | |
3208 | ||
3209 | /* Make C-g and alarm signals set flags again */ | |
3210 | clear_waiting_for_input (); | |
3211 | ||
3212 | /* If we woke up due to SIGWINCH, actually change size now. */ | |
3213 | do_pending_window_change (); | |
3214 | ||
3215 | if (nfds == -1) | |
3216 | { | |
3217 | /* If the system call was interrupted, then go around the | |
3218 | loop again. */ | |
3219 | if (errno == EINTR) | |
3220 | waitchannels = 0; | |
3221 | } | |
3222 | #ifdef sun | |
3223 | else if (nfds > 0 && (waitchannels & 1) && interrupt_input) | |
3224 | /* System sometimes fails to deliver SIGIO. */ | |
3225 | kill (getpid (), SIGIO); | |
3226 | #endif | |
7324d660 | 3227 | #ifdef SIGIO |
f76475ad | 3228 | if (XINT (read_kbd) && interrupt_input && (waitchannels & 1)) |
6720a7fb | 3229 | kill (0, SIGIO); |
7324d660 | 3230 | #endif |
6720a7fb JB |
3231 | |
3232 | /* If we have timed out (nfds == 0) or found some input (nfds > 0), | |
3233 | we should exit. */ | |
3234 | if (nfds >= 0) | |
3235 | break; | |
3236 | } | |
3237 | ||
a87b802f JB |
3238 | start_polling (); |
3239 | ||
6720a7fb JB |
3240 | return 0; |
3241 | } | |
3242 | ||
3243 | ||
3244 | DEFUN ("get-buffer-process", Fget_buffer_process, Sget_buffer_process, 1, 1, 0, | |
312c9964 RS |
3245 | /* Don't confused make-docfile by having two doc strings for this function. |
3246 | make-docfile does not pay attention to #if, for good reason! */ | |
3247 | 0) | |
6720a7fb JB |
3248 | (name) |
3249 | register Lisp_Object name; | |
3250 | { | |
3251 | return Qnil; | |
3252 | } | |
3253 | ||
3254 | /* Kill all processes associated with `buffer'. | |
3255 | If `buffer' is nil, kill all processes. | |
3256 | Since we have no subprocesses, this does nothing. */ | |
3257 | ||
3258 | kill_buffer_processes (buffer) | |
3259 | Lisp_Object buffer; | |
3260 | { | |
3261 | } | |
3262 | ||
3263 | init_process () | |
3264 | { | |
3265 | } | |
3266 | ||
3267 | syms_of_process () | |
3268 | { | |
3269 | defsubr (&Sget_buffer_process); | |
3270 | } | |
3271 | ||
3272 | \f | |
3273 | #endif /* not subprocesses */ |