Commit | Line | Data |
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d0d6b7c5 | 1 | /* Asynchronous subprocess control for GNU Emacs. |
68c45bf0 | 2 | Copyright (C) 1985, 86, 87, 88, 93, 94, 95, 96, 98, 1999 |
03832893 | 3 | Free Software Foundation, Inc. |
d0d6b7c5 JB |
4 | |
5 | This file is part of GNU Emacs. | |
6 | ||
7 | GNU Emacs is free software; you can redistribute it and/or modify | |
8 | it under the terms of the GNU General Public License as published by | |
1dc77cc3 | 9 | the Free Software Foundation; either version 2, or (at your option) |
d0d6b7c5 JB |
10 | any later version. |
11 | ||
12 | GNU Emacs is distributed in the hope that it will be useful, | |
13 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
15 | GNU General Public License for more details. | |
16 | ||
17 | You should have received a copy of the GNU General Public License | |
18 | along with GNU Emacs; see the file COPYING. If not, write to | |
3b7ad313 EN |
19 | the Free Software Foundation, Inc., 59 Temple Place - Suite 330, |
20 | Boston, MA 02111-1307, USA. */ | |
d0d6b7c5 JB |
21 | |
22 | ||
827a1788 | 23 | #define _GNU_SOURCE /* to get strsignal declared with glibc 2 */ |
18160b98 | 24 | #include <config.h> |
68c45bf0 PE |
25 | #include <signal.h> |
26 | ||
6720a7fb JB |
27 | /* This file is split into two parts by the following preprocessor |
28 | conditional. The 'then' clause contains all of the support for | |
29 | asynchronous subprocesses. The 'else' clause contains stub | |
30 | versions of some of the asynchronous subprocess routines that are | |
31 | often called elsewhere in Emacs, so we don't have to #ifdef the | |
32 | sections that call them. */ | |
33 | ||
34 | \f | |
d0d6b7c5 | 35 | #ifdef subprocesses |
d0d6b7c5 JB |
36 | |
37 | #include <stdio.h> | |
38 | #include <errno.h> | |
39 | #include <setjmp.h> | |
40 | #include <sys/types.h> /* some typedefs are used in sys/file.h */ | |
41 | #include <sys/file.h> | |
42 | #include <sys/stat.h> | |
93b4f699 RS |
43 | #ifdef HAVE_UNISTD_H |
44 | #include <unistd.h> | |
45 | #endif | |
d0d6b7c5 | 46 | |
e98d950b RS |
47 | #ifdef WINDOWSNT |
48 | #include <stdlib.h> | |
49 | #include <fcntl.h> | |
50 | #endif /* not WINDOWSNT */ | |
51 | ||
d0d6b7c5 JB |
52 | #ifdef HAVE_SOCKETS /* TCP connection support, if kernel can do it */ |
53 | #include <sys/socket.h> | |
54 | #include <netdb.h> | |
55 | #include <netinet/in.h> | |
56 | #include <arpa/inet.h> | |
f2cfa9a6 RS |
57 | #ifdef NEED_NET_ERRNO_H |
58 | #include <net/errno.h> | |
59 | #endif /* NEED_NET_ERRNO_H */ | |
d0d6b7c5 JB |
60 | #endif /* HAVE_SOCKETS */ |
61 | ||
827a1788 | 62 | /* TERM is a poor-man's SLIP, used on GNU/Linux. */ |
1d2c16fa RS |
63 | #ifdef TERM |
64 | #include <client.h> | |
65 | #endif | |
66 | ||
cf32fea0 PR |
67 | /* On some systems, e.g. DGUX, inet_addr returns a 'struct in_addr'. */ |
68 | #ifdef HAVE_BROKEN_INET_ADDR | |
79967d5e RS |
69 | #define IN_ADDR struct in_addr |
70 | #define NUMERIC_ADDR_ERROR (numeric_addr.s_addr == -1) | |
71 | #else | |
72 | #define IN_ADDR unsigned long | |
73 | #define NUMERIC_ADDR_ERROR (numeric_addr == -1) | |
74 | #endif | |
75 | ||
6df54671 | 76 | #if defined(BSD_SYSTEM) || defined(STRIDE) |
d0d6b7c5 | 77 | #include <sys/ioctl.h> |
0ad77c54 | 78 | #if !defined (O_NDELAY) && defined (HAVE_PTYS) && !defined(USG5) |
d0d6b7c5 JB |
79 | #include <fcntl.h> |
80 | #endif /* HAVE_PTYS and no O_NDELAY */ | |
6df54671 | 81 | #endif /* BSD_SYSTEM || STRIDE */ |
d0d6b7c5 | 82 | |
99e3d726 RS |
83 | #ifdef BROKEN_O_NONBLOCK |
84 | #undef O_NONBLOCK | |
85 | #endif /* BROKEN_O_NONBLOCK */ | |
86 | ||
d0d6b7c5 JB |
87 | #ifdef NEED_BSDTTY |
88 | #include <bsdtty.h> | |
89 | #endif | |
90 | ||
d0d6b7c5 JB |
91 | #ifdef IRIS |
92 | #include <sys/sysmacros.h> /* for "minor" */ | |
93 | #endif /* not IRIS */ | |
94 | ||
95 | #include "systime.h" | |
36ebaafa | 96 | #include "systty.h" |
d0d6b7c5 JB |
97 | |
98 | #include "lisp.h" | |
99 | #include "window.h" | |
100 | #include "buffer.h" | |
0fa1789e KH |
101 | #include "charset.h" |
102 | #include "coding.h" | |
d0d6b7c5 JB |
103 | #include "process.h" |
104 | #include "termhooks.h" | |
105 | #include "termopts.h" | |
106 | #include "commands.h" | |
1dc77cc3 | 107 | #include "frame.h" |
ececcbec | 108 | #include "blockinput.h" |
dfcf069d AS |
109 | #include "keyboard.h" |
110 | #include "dispextern.h" | |
e0016554 | 111 | #include "composite.h" |
30904ab7 | 112 | #include "atimer.h" |
d0d6b7c5 | 113 | |
0c9960e9 RS |
114 | #define max(a, b) ((a) > (b) ? (a) : (b)) |
115 | ||
dd2281ae | 116 | Lisp_Object Qprocessp; |
d0d6b7c5 | 117 | Lisp_Object Qrun, Qstop, Qsignal, Qopen, Qclosed; |
6545aada | 118 | Lisp_Object Qlast_nonmenu_event; |
d0d6b7c5 JB |
119 | /* Qexit is declared and initialized in eval.c. */ |
120 | ||
121 | /* a process object is a network connection when its childp field is neither | |
de282a05 | 122 | Qt nor Qnil but is instead a cons cell (HOSTNAME PORTNUM). */ |
d0d6b7c5 JB |
123 | |
124 | #ifdef HAVE_SOCKETS | |
de282a05 | 125 | #define NETCONN_P(p) (GC_CONSP (XPROCESS (p)->childp)) |
d0d6b7c5 JB |
126 | #else |
127 | #define NETCONN_P(p) 0 | |
128 | #endif /* HAVE_SOCKETS */ | |
129 | ||
130 | /* Define first descriptor number available for subprocesses. */ | |
131 | #ifdef VMS | |
132 | #define FIRST_PROC_DESC 1 | |
133 | #else /* Not VMS */ | |
134 | #define FIRST_PROC_DESC 3 | |
135 | #endif | |
136 | ||
137 | /* Define SIGCHLD as an alias for SIGCLD. There are many conditionals | |
138 | testing SIGCHLD. */ | |
139 | ||
140 | #if !defined (SIGCHLD) && defined (SIGCLD) | |
141 | #define SIGCHLD SIGCLD | |
142 | #endif /* SIGCLD */ | |
143 | ||
144 | #include "syssignal.h" | |
145 | ||
889255b4 | 146 | #include "syswait.h" |
d0d6b7c5 | 147 | |
41d03b9a GM |
148 | extern void set_waiting_for_input P_ ((EMACS_TIME *)); |
149 | ||
b062d1fe | 150 | extern int errno; |
b062d1fe | 151 | #ifdef VMS |
d0d6b7c5 | 152 | extern char *sys_errlist[]; |
b062d1fe | 153 | #endif |
d0d6b7c5 | 154 | |
5f0929a7 RS |
155 | #ifndef HAVE_H_ERRNO |
156 | extern int h_errno; | |
157 | #endif | |
158 | ||
d0d6b7c5 JB |
159 | /* t means use pty, nil means use a pipe, |
160 | maybe other values to come. */ | |
dd2281ae | 161 | static Lisp_Object Vprocess_connection_type; |
d0d6b7c5 JB |
162 | |
163 | #ifdef SKTPAIR | |
164 | #ifndef HAVE_SOCKETS | |
165 | #include <sys/socket.h> | |
166 | #endif | |
167 | #endif /* SKTPAIR */ | |
168 | ||
17d02632 KH |
169 | /* These next two vars are non-static since sysdep.c uses them in the |
170 | emulation of `select'. */ | |
d0d6b7c5 | 171 | /* Number of events of change of status of a process. */ |
17d02632 | 172 | int process_tick; |
d0d6b7c5 | 173 | /* Number of events for which the user or sentinel has been notified. */ |
17d02632 | 174 | int update_tick; |
d0d6b7c5 | 175 | |
5886acf9 | 176 | #include "sysselect.h" |
d0d6b7c5 | 177 | |
41d03b9a GM |
178 | extern int keyboard_bit_set P_ ((SELECT_TYPE *)); |
179 | ||
583dcae4 | 180 | /* If we support a window system, turn on the code to poll periodically |
44ade2e9 | 181 | to detect C-g. It isn't actually used when doing interrupt input. */ |
583dcae4 | 182 | #ifdef HAVE_WINDOW_SYSTEM |
44ade2e9 RS |
183 | #define POLL_FOR_INPUT |
184 | #endif | |
185 | ||
a69281ff | 186 | /* Mask of bits indicating the descriptors that we wait for input on. */ |
d0d6b7c5 | 187 | |
dd2281ae RS |
188 | static SELECT_TYPE input_wait_mask; |
189 | ||
a69281ff RS |
190 | /* Mask that excludes keyboard input descriptor (s). */ |
191 | ||
192 | static SELECT_TYPE non_keyboard_wait_mask; | |
193 | ||
b5dc1c83 RS |
194 | /* Mask that excludes process input descriptor (s). */ |
195 | ||
196 | static SELECT_TYPE non_process_wait_mask; | |
197 | ||
7d0e672e RS |
198 | /* The largest descriptor currently in use for a process object. */ |
199 | static int max_process_desc; | |
200 | ||
a69281ff RS |
201 | /* The largest descriptor currently in use for keyboard input. */ |
202 | static int max_keyboard_desc; | |
d0d6b7c5 | 203 | |
dd2281ae RS |
204 | /* Nonzero means delete a process right away if it exits. */ |
205 | static int delete_exited_processes; | |
d0d6b7c5 JB |
206 | |
207 | /* Indexed by descriptor, gives the process (if any) for that descriptor */ | |
41f3aa98 | 208 | Lisp_Object chan_process[MAXDESC]; |
d0d6b7c5 JB |
209 | |
210 | /* Alist of elements (NAME . PROCESS) */ | |
41f3aa98 | 211 | Lisp_Object Vprocess_alist; |
d0d6b7c5 JB |
212 | |
213 | /* Buffered-ahead input char from process, indexed by channel. | |
214 | -1 means empty (no char is buffered). | |
215 | Used on sys V where the only way to tell if there is any | |
216 | output from the process is to read at least one char. | |
217 | Always -1 on systems that support FIONREAD. */ | |
218 | ||
e98d950b RS |
219 | /* Don't make static; need to access externally. */ |
220 | int proc_buffered_char[MAXDESC]; | |
dd2281ae | 221 | |
0fa1789e | 222 | /* Table of `struct coding-system' for each process. */ |
c7580538 KH |
223 | static struct coding_system *proc_decode_coding_system[MAXDESC]; |
224 | static struct coding_system *proc_encode_coding_system[MAXDESC]; | |
0fa1789e | 225 | |
dd2281ae | 226 | static Lisp_Object get_process (); |
93b4f699 | 227 | |
fb4c3627 | 228 | extern EMACS_TIME timer_check (); |
5de50bfb | 229 | extern int timers_run; |
fb4c3627 | 230 | |
93b4f699 RS |
231 | /* Maximum number of bytes to send to a pty without an eof. */ |
232 | static int pty_max_bytes; | |
3b9a3dfa | 233 | |
14dc6093 | 234 | extern Lisp_Object Vfile_name_coding_system, Vdefault_file_name_coding_system; |
a932f187 | 235 | |
875e6b94 KH |
236 | #ifdef HAVE_PTYS |
237 | /* The file name of the pty opened by allocate_pty. */ | |
3b9a3dfa RS |
238 | |
239 | static char pty_name[24]; | |
875e6b94 | 240 | #endif |
d0d6b7c5 JB |
241 | \f |
242 | /* Compute the Lisp form of the process status, p->status, from | |
243 | the numeric status that was returned by `wait'. */ | |
244 | ||
f9738840 JB |
245 | Lisp_Object status_convert (); |
246 | ||
dfcf069d | 247 | void |
d0d6b7c5 JB |
248 | update_status (p) |
249 | struct Lisp_Process *p; | |
250 | { | |
251 | union { int i; WAITTYPE wt; } u; | |
252 | u.i = XFASTINT (p->raw_status_low) + (XFASTINT (p->raw_status_high) << 16); | |
253 | p->status = status_convert (u.wt); | |
254 | p->raw_status_low = Qnil; | |
255 | p->raw_status_high = Qnil; | |
256 | } | |
257 | ||
91d10fa8 | 258 | /* Convert a process status word in Unix format to |
d0d6b7c5 JB |
259 | the list that we use internally. */ |
260 | ||
261 | Lisp_Object | |
262 | status_convert (w) | |
263 | WAITTYPE w; | |
264 | { | |
265 | if (WIFSTOPPED (w)) | |
266 | return Fcons (Qstop, Fcons (make_number (WSTOPSIG (w)), Qnil)); | |
267 | else if (WIFEXITED (w)) | |
268 | return Fcons (Qexit, Fcons (make_number (WRETCODE (w)), | |
269 | WCOREDUMP (w) ? Qt : Qnil)); | |
270 | else if (WIFSIGNALED (w)) | |
271 | return Fcons (Qsignal, Fcons (make_number (WTERMSIG (w)), | |
272 | WCOREDUMP (w) ? Qt : Qnil)); | |
273 | else | |
274 | return Qrun; | |
275 | } | |
276 | ||
277 | /* Given a status-list, extract the three pieces of information | |
278 | and store them individually through the three pointers. */ | |
279 | ||
280 | void | |
281 | decode_status (l, symbol, code, coredump) | |
282 | Lisp_Object l; | |
283 | Lisp_Object *symbol; | |
284 | int *code; | |
285 | int *coredump; | |
286 | { | |
287 | Lisp_Object tem; | |
288 | ||
bcd69aea | 289 | if (SYMBOLP (l)) |
d0d6b7c5 JB |
290 | { |
291 | *symbol = l; | |
292 | *code = 0; | |
293 | *coredump = 0; | |
294 | } | |
295 | else | |
296 | { | |
70949dac KR |
297 | *symbol = XCAR (l); |
298 | tem = XCDR (l); | |
299 | *code = XFASTINT (XCAR (tem)); | |
300 | tem = XCDR (tem); | |
d0d6b7c5 JB |
301 | *coredump = !NILP (tem); |
302 | } | |
303 | } | |
304 | ||
305 | /* Return a string describing a process status list. */ | |
306 | ||
307 | Lisp_Object | |
308 | status_message (status) | |
309 | Lisp_Object status; | |
310 | { | |
311 | Lisp_Object symbol; | |
312 | int code, coredump; | |
313 | Lisp_Object string, string2; | |
314 | ||
315 | decode_status (status, &symbol, &code, &coredump); | |
316 | ||
317 | if (EQ (symbol, Qsignal) || EQ (symbol, Qstop)) | |
318 | { | |
68c45bf0 | 319 | char *signame; |
ca9c0567 | 320 | synchronize_system_messages_locale (); |
68c45bf0 | 321 | signame = strsignal (code); |
b97ad9ea RS |
322 | if (signame == 0) |
323 | signame = "unknown"; | |
324 | string = build_string (signame); | |
d0d6b7c5 JB |
325 | string2 = build_string (coredump ? " (core dumped)\n" : "\n"); |
326 | XSTRING (string)->data[0] = DOWNCASE (XSTRING (string)->data[0]); | |
327 | return concat2 (string, string2); | |
328 | } | |
329 | else if (EQ (symbol, Qexit)) | |
330 | { | |
331 | if (code == 0) | |
332 | return build_string ("finished\n"); | |
f2980264 | 333 | string = Fnumber_to_string (make_number (code)); |
d0d6b7c5 JB |
334 | string2 = build_string (coredump ? " (core dumped)\n" : "\n"); |
335 | return concat2 (build_string ("exited abnormally with code "), | |
336 | concat2 (string, string2)); | |
337 | } | |
338 | else | |
339 | return Fcopy_sequence (Fsymbol_name (symbol)); | |
340 | } | |
341 | \f | |
342 | #ifdef HAVE_PTYS | |
d0d6b7c5 | 343 | |
875e6b94 KH |
344 | /* Open an available pty, returning a file descriptor. |
345 | Return -1 on failure. | |
346 | The file name of the terminal corresponding to the pty | |
347 | is left in the variable pty_name. */ | |
348 | ||
d0d6b7c5 JB |
349 | int |
350 | allocate_pty () | |
351 | { | |
352 | struct stat stb; | |
dfcf069d | 353 | register int c, i; |
d0d6b7c5 JB |
354 | int fd; |
355 | ||
32676c08 JB |
356 | /* Some systems name their pseudoterminals so that there are gaps in |
357 | the usual sequence - for example, on HP9000/S700 systems, there | |
358 | are no pseudoterminals with names ending in 'f'. So we wait for | |
359 | three failures in a row before deciding that we've reached the | |
360 | end of the ptys. */ | |
361 | int failed_count = 0; | |
362 | ||
d0d6b7c5 JB |
363 | #ifdef PTY_ITERATION |
364 | PTY_ITERATION | |
365 | #else | |
366 | for (c = FIRST_PTY_LETTER; c <= 'z'; c++) | |
367 | for (i = 0; i < 16; i++) | |
368 | #endif | |
369 | { | |
370 | #ifdef PTY_NAME_SPRINTF | |
371 | PTY_NAME_SPRINTF | |
d0d6b7c5 JB |
372 | #else |
373 | sprintf (pty_name, "/dev/pty%c%x", c, i); | |
d0d6b7c5 JB |
374 | #endif /* no PTY_NAME_SPRINTF */ |
375 | ||
4d7c105e RS |
376 | #ifdef PTY_OPEN |
377 | PTY_OPEN; | |
378 | #else /* no PTY_OPEN */ | |
32676c08 JB |
379 | #ifdef IRIS |
380 | /* Unusual IRIS code */ | |
68c45bf0 | 381 | *ptyv = emacs_open ("/dev/ptc", O_RDWR | O_NDELAY, 0); |
32676c08 JB |
382 | if (fd < 0) |
383 | return -1; | |
384 | if (fstat (fd, &stb) < 0) | |
d0d6b7c5 | 385 | return -1; |
4d7c105e | 386 | #else /* not IRIS */ |
32676c08 JB |
387 | if (stat (pty_name, &stb) < 0) |
388 | { | |
389 | failed_count++; | |
390 | if (failed_count >= 3) | |
391 | return -1; | |
392 | } | |
393 | else | |
394 | failed_count = 0; | |
d0d6b7c5 | 395 | #ifdef O_NONBLOCK |
68c45bf0 | 396 | fd = emacs_open (pty_name, O_RDWR | O_NONBLOCK, 0); |
d0d6b7c5 | 397 | #else |
68c45bf0 | 398 | fd = emacs_open (pty_name, O_RDWR | O_NDELAY, 0); |
d0d6b7c5 | 399 | #endif |
4d7c105e RS |
400 | #endif /* not IRIS */ |
401 | #endif /* no PTY_OPEN */ | |
d0d6b7c5 JB |
402 | |
403 | if (fd >= 0) | |
404 | { | |
405 | /* check to make certain that both sides are available | |
406 | this avoids a nasty yet stupid bug in rlogins */ | |
407 | #ifdef PTY_TTY_NAME_SPRINTF | |
408 | PTY_TTY_NAME_SPRINTF | |
d0d6b7c5 JB |
409 | #else |
410 | sprintf (pty_name, "/dev/tty%c%x", c, i); | |
d0d6b7c5 JB |
411 | #endif /* no PTY_TTY_NAME_SPRINTF */ |
412 | #ifndef UNIPLUS | |
413 | if (access (pty_name, 6) != 0) | |
414 | { | |
68c45bf0 | 415 | emacs_close (fd); |
fad97cbe | 416 | #if !defined(IRIS) && !defined(__sgi) |
d0d6b7c5 JB |
417 | continue; |
418 | #else | |
419 | return -1; | |
420 | #endif /* IRIS */ | |
421 | } | |
422 | #endif /* not UNIPLUS */ | |
423 | setup_pty (fd); | |
424 | return fd; | |
425 | } | |
426 | } | |
427 | return -1; | |
428 | } | |
429 | #endif /* HAVE_PTYS */ | |
430 | \f | |
431 | Lisp_Object | |
432 | make_process (name) | |
433 | Lisp_Object name; | |
434 | { | |
23d6bb9c | 435 | struct Lisp_Vector *vec; |
d0d6b7c5 JB |
436 | register Lisp_Object val, tem, name1; |
437 | register struct Lisp_Process *p; | |
438 | char suffix[10]; | |
439 | register int i; | |
440 | ||
23d6bb9c KH |
441 | vec = allocate_vectorlike ((EMACS_INT) VECSIZE (struct Lisp_Process)); |
442 | for (i = 0; i < VECSIZE (struct Lisp_Process); i++) | |
443 | vec->contents[i] = Qnil; | |
444 | vec->size = VECSIZE (struct Lisp_Process); | |
445 | p = (struct Lisp_Process *)vec; | |
446 | ||
1d056e64 KH |
447 | XSETINT (p->infd, -1); |
448 | XSETINT (p->outfd, -1); | |
22719df2 KH |
449 | XSETFASTINT (p->pid, 0); |
450 | XSETFASTINT (p->tick, 0); | |
451 | XSETFASTINT (p->update_tick, 0); | |
d0d6b7c5 JB |
452 | p->raw_status_low = Qnil; |
453 | p->raw_status_high = Qnil; | |
454 | p->status = Qrun; | |
455 | p->mark = Fmake_marker (); | |
456 | ||
457 | /* If name is already in use, modify it until it is unused. */ | |
458 | ||
459 | name1 = name; | |
460 | for (i = 1; ; i++) | |
461 | { | |
462 | tem = Fget_process (name1); | |
463 | if (NILP (tem)) break; | |
464 | sprintf (suffix, "<%d>", i); | |
465 | name1 = concat2 (name, build_string (suffix)); | |
466 | } | |
467 | name = name1; | |
468 | p->name = name; | |
23d6bb9c | 469 | XSETPROCESS (val, p); |
d0d6b7c5 JB |
470 | Vprocess_alist = Fcons (Fcons (name, val), Vprocess_alist); |
471 | return val; | |
472 | } | |
473 | ||
dfcf069d | 474 | void |
d0d6b7c5 JB |
475 | remove_process (proc) |
476 | register Lisp_Object proc; | |
477 | { | |
478 | register Lisp_Object pair; | |
479 | ||
480 | pair = Frassq (proc, Vprocess_alist); | |
481 | Vprocess_alist = Fdelq (pair, Vprocess_alist); | |
d0d6b7c5 JB |
482 | |
483 | deactivate_process (proc); | |
484 | } | |
485 | \f | |
486 | DEFUN ("processp", Fprocessp, Sprocessp, 1, 1, 0, | |
487 | "Return t if OBJECT is a process.") | |
4ee3e309 EN |
488 | (object) |
489 | Lisp_Object object; | |
d0d6b7c5 | 490 | { |
4ee3e309 | 491 | return PROCESSP (object) ? Qt : Qnil; |
d0d6b7c5 JB |
492 | } |
493 | ||
494 | DEFUN ("get-process", Fget_process, Sget_process, 1, 1, 0, | |
495 | "Return the process named NAME, or nil if there is none.") | |
496 | (name) | |
497 | register Lisp_Object name; | |
498 | { | |
bcd69aea | 499 | if (PROCESSP (name)) |
d0d6b7c5 JB |
500 | return name; |
501 | CHECK_STRING (name, 0); | |
502 | return Fcdr (Fassoc (name, Vprocess_alist)); | |
503 | } | |
504 | ||
505 | DEFUN ("get-buffer-process", Fget_buffer_process, Sget_buffer_process, 1, 1, 0, | |
7744ca33 | 506 | "Return the (or a) process associated with BUFFER.\n\ |
d0d6b7c5 | 507 | BUFFER may be a buffer or the name of one.") |
4ee3e309 EN |
508 | (buffer) |
509 | register Lisp_Object buffer; | |
d0d6b7c5 JB |
510 | { |
511 | register Lisp_Object buf, tail, proc; | |
512 | ||
4ee3e309 EN |
513 | if (NILP (buffer)) return Qnil; |
514 | buf = Fget_buffer (buffer); | |
d0d6b7c5 JB |
515 | if (NILP (buf)) return Qnil; |
516 | ||
517 | for (tail = Vprocess_alist; !NILP (tail); tail = Fcdr (tail)) | |
518 | { | |
519 | proc = Fcdr (Fcar (tail)); | |
bcd69aea | 520 | if (PROCESSP (proc) && EQ (XPROCESS (proc)->buffer, buf)) |
d0d6b7c5 JB |
521 | return proc; |
522 | } | |
523 | return Qnil; | |
524 | } | |
525 | ||
ebb9e16f JB |
526 | /* This is how commands for the user decode process arguments. It |
527 | accepts a process, a process name, a buffer, a buffer name, or nil. | |
528 | Buffers denote the first process in the buffer, and nil denotes the | |
529 | current buffer. */ | |
d0d6b7c5 | 530 | |
77b221b1 | 531 | static Lisp_Object |
d0d6b7c5 JB |
532 | get_process (name) |
533 | register Lisp_Object name; | |
534 | { | |
1619761d KH |
535 | register Lisp_Object proc, obj; |
536 | if (STRINGP (name)) | |
537 | { | |
538 | obj = Fget_process (name); | |
539 | if (NILP (obj)) | |
540 | obj = Fget_buffer (name); | |
541 | if (NILP (obj)) | |
542 | error ("Process %s does not exist", XSTRING (name)->data); | |
543 | } | |
544 | else if (NILP (name)) | |
545 | obj = Fcurrent_buffer (); | |
d0d6b7c5 | 546 | else |
1619761d KH |
547 | obj = name; |
548 | ||
549 | /* Now obj should be either a buffer object or a process object. | |
550 | */ | |
551 | if (BUFFERP (obj)) | |
d0d6b7c5 | 552 | { |
1619761d | 553 | proc = Fget_buffer_process (obj); |
d0d6b7c5 | 554 | if (NILP (proc)) |
1619761d | 555 | error ("Buffer %s has no process", XSTRING (XBUFFER (obj)->name)->data); |
d0d6b7c5 | 556 | } |
d0d6b7c5 | 557 | else |
1619761d KH |
558 | { |
559 | CHECK_PROCESS (obj, 0); | |
560 | proc = obj; | |
561 | } | |
562 | return proc; | |
d0d6b7c5 JB |
563 | } |
564 | ||
565 | DEFUN ("delete-process", Fdelete_process, Sdelete_process, 1, 1, 0, | |
566 | "Delete PROCESS: kill it and forget about it immediately.\n\ | |
ebb9e16f JB |
567 | PROCESS may be a process, a buffer, the name of a process or buffer, or\n\ |
568 | nil, indicating the current buffer's process.") | |
4ee3e309 EN |
569 | (process) |
570 | register Lisp_Object process; | |
d0d6b7c5 | 571 | { |
4ee3e309 EN |
572 | process = get_process (process); |
573 | XPROCESS (process)->raw_status_low = Qnil; | |
574 | XPROCESS (process)->raw_status_high = Qnil; | |
575 | if (NETCONN_P (process)) | |
d0d6b7c5 | 576 | { |
4ee3e309 EN |
577 | XPROCESS (process)->status = Fcons (Qexit, Fcons (make_number (0), Qnil)); |
578 | XSETINT (XPROCESS (process)->tick, ++process_tick); | |
d0d6b7c5 | 579 | } |
4ee3e309 | 580 | else if (XINT (XPROCESS (process)->infd) >= 0) |
d0d6b7c5 | 581 | { |
4ee3e309 | 582 | Fkill_process (process, Qnil); |
d0d6b7c5 | 583 | /* Do this now, since remove_process will make sigchld_handler do nothing. */ |
4ee3e309 | 584 | XPROCESS (process)->status |
d0d6b7c5 | 585 | = Fcons (Qsignal, Fcons (make_number (SIGKILL), Qnil)); |
4ee3e309 | 586 | XSETINT (XPROCESS (process)->tick, ++process_tick); |
d0d6b7c5 JB |
587 | status_notify (); |
588 | } | |
4ee3e309 | 589 | remove_process (process); |
d0d6b7c5 JB |
590 | return Qnil; |
591 | } | |
592 | \f | |
593 | DEFUN ("process-status", Fprocess_status, Sprocess_status, 1, 1, 0, | |
7744ca33 KH |
594 | "Return the status of PROCESS.\n\ |
595 | The returned value is one of the following symbols:\n\ | |
d0d6b7c5 JB |
596 | run -- for a process that is running.\n\ |
597 | stop -- for a process stopped but continuable.\n\ | |
598 | exit -- for a process that has exited.\n\ | |
599 | signal -- for a process that has got a fatal signal.\n\ | |
600 | open -- for a network stream connection that is open.\n\ | |
601 | closed -- for a network stream connection that is closed.\n\ | |
ebb9e16f | 602 | nil -- if arg is a process name and no such process exists.\n\ |
31cd7d00 | 603 | PROCESS may be a process, a buffer, the name of a process, or\n\ |
ebb9e16f | 604 | nil, indicating the current buffer's process.") |
4ee3e309 EN |
605 | (process) |
606 | register Lisp_Object process; | |
d0d6b7c5 JB |
607 | { |
608 | register struct Lisp_Process *p; | |
609 | register Lisp_Object status; | |
343f4114 | 610 | |
4ee3e309 EN |
611 | if (STRINGP (process)) |
612 | process = Fget_process (process); | |
343f4114 | 613 | else |
4ee3e309 | 614 | process = get_process (process); |
343f4114 | 615 | |
4ee3e309 EN |
616 | if (NILP (process)) |
617 | return process; | |
343f4114 | 618 | |
4ee3e309 | 619 | p = XPROCESS (process); |
d0d6b7c5 JB |
620 | if (!NILP (p->raw_status_low)) |
621 | update_status (p); | |
622 | status = p->status; | |
bcd69aea | 623 | if (CONSP (status)) |
70949dac | 624 | status = XCAR (status); |
4ee3e309 | 625 | if (NETCONN_P (process)) |
d0d6b7c5 JB |
626 | { |
627 | if (EQ (status, Qrun)) | |
628 | status = Qopen; | |
629 | else if (EQ (status, Qexit)) | |
630 | status = Qclosed; | |
631 | } | |
632 | return status; | |
633 | } | |
634 | ||
635 | DEFUN ("process-exit-status", Fprocess_exit_status, Sprocess_exit_status, | |
636 | 1, 1, 0, | |
637 | "Return the exit status of PROCESS or the signal number that killed it.\n\ | |
638 | If PROCESS has not yet exited or died, return 0.") | |
4ee3e309 EN |
639 | (process) |
640 | register Lisp_Object process; | |
d0d6b7c5 | 641 | { |
4ee3e309 EN |
642 | CHECK_PROCESS (process, 0); |
643 | if (!NILP (XPROCESS (process)->raw_status_low)) | |
644 | update_status (XPROCESS (process)); | |
645 | if (CONSP (XPROCESS (process)->status)) | |
70949dac | 646 | return XCAR (XCDR (XPROCESS (process)->status)); |
d0d6b7c5 JB |
647 | return make_number (0); |
648 | } | |
649 | ||
650 | DEFUN ("process-id", Fprocess_id, Sprocess_id, 1, 1, 0, | |
651 | "Return the process id of PROCESS.\n\ | |
652 | This is the pid of the Unix process which PROCESS uses or talks to.\n\ | |
653 | For a network connection, this value is nil.") | |
4ee3e309 EN |
654 | (process) |
655 | register Lisp_Object process; | |
d0d6b7c5 | 656 | { |
4ee3e309 EN |
657 | CHECK_PROCESS (process, 0); |
658 | return XPROCESS (process)->pid; | |
d0d6b7c5 JB |
659 | } |
660 | ||
661 | DEFUN ("process-name", Fprocess_name, Sprocess_name, 1, 1, 0, | |
662 | "Return the name of PROCESS, as a string.\n\ | |
663 | This is the name of the program invoked in PROCESS,\n\ | |
664 | possibly modified to make it unique among process names.") | |
4ee3e309 EN |
665 | (process) |
666 | register Lisp_Object process; | |
d0d6b7c5 | 667 | { |
4ee3e309 EN |
668 | CHECK_PROCESS (process, 0); |
669 | return XPROCESS (process)->name; | |
d0d6b7c5 JB |
670 | } |
671 | ||
672 | DEFUN ("process-command", Fprocess_command, Sprocess_command, 1, 1, 0, | |
673 | "Return the command that was executed to start PROCESS.\n\ | |
674 | This is a list of strings, the first string being the program executed\n\ | |
675 | and the rest of the strings being the arguments given to it.\n\ | |
676 | For a non-child channel, this is nil.") | |
4ee3e309 EN |
677 | (process) |
678 | register Lisp_Object process; | |
d0d6b7c5 | 679 | { |
4ee3e309 EN |
680 | CHECK_PROCESS (process, 0); |
681 | return XPROCESS (process)->command; | |
d0d6b7c5 JB |
682 | } |
683 | ||
3b9a3dfa RS |
684 | DEFUN ("process-tty-name", Fprocess_tty_name, Sprocess_tty_name, 1, 1, 0, |
685 | "Return the name of the terminal PROCESS uses, or nil if none.\n\ | |
686 | This is the terminal that the process itself reads and writes on,\n\ | |
687 | not the name of the pty that Emacs uses to talk with that terminal.") | |
4ee3e309 EN |
688 | (process) |
689 | register Lisp_Object process; | |
3b9a3dfa | 690 | { |
4ee3e309 EN |
691 | CHECK_PROCESS (process, 0); |
692 | return XPROCESS (process)->tty_name; | |
3b9a3dfa RS |
693 | } |
694 | ||
d0d6b7c5 JB |
695 | DEFUN ("set-process-buffer", Fset_process_buffer, Sset_process_buffer, |
696 | 2, 2, 0, | |
697 | "Set buffer associated with PROCESS to BUFFER (a buffer, or nil).") | |
4ee3e309 EN |
698 | (process, buffer) |
699 | register Lisp_Object process, buffer; | |
d0d6b7c5 | 700 | { |
4ee3e309 | 701 | CHECK_PROCESS (process, 0); |
d0d6b7c5 JB |
702 | if (!NILP (buffer)) |
703 | CHECK_BUFFER (buffer, 1); | |
4ee3e309 | 704 | XPROCESS (process)->buffer = buffer; |
d0d6b7c5 JB |
705 | return buffer; |
706 | } | |
707 | ||
708 | DEFUN ("process-buffer", Fprocess_buffer, Sprocess_buffer, | |
709 | 1, 1, 0, | |
710 | "Return the buffer PROCESS is associated with.\n\ | |
7744ca33 | 711 | Output from PROCESS is inserted in this buffer unless PROCESS has a filter.") |
4ee3e309 EN |
712 | (process) |
713 | register Lisp_Object process; | |
d0d6b7c5 | 714 | { |
4ee3e309 EN |
715 | CHECK_PROCESS (process, 0); |
716 | return XPROCESS (process)->buffer; | |
d0d6b7c5 JB |
717 | } |
718 | ||
719 | DEFUN ("process-mark", Fprocess_mark, Sprocess_mark, | |
720 | 1, 1, 0, | |
721 | "Return the marker for the end of the last output from PROCESS.") | |
4ee3e309 EN |
722 | (process) |
723 | register Lisp_Object process; | |
d0d6b7c5 | 724 | { |
4ee3e309 EN |
725 | CHECK_PROCESS (process, 0); |
726 | return XPROCESS (process)->mark; | |
d0d6b7c5 JB |
727 | } |
728 | ||
729 | DEFUN ("set-process-filter", Fset_process_filter, Sset_process_filter, | |
730 | 2, 2, 0, | |
731 | "Give PROCESS the filter function FILTER; nil means no filter.\n\ | |
20ddfff7 | 732 | t means stop accepting output from the process.\n\ |
d0d6b7c5 JB |
733 | When a process has a filter, each time it does output\n\ |
734 | the entire string of output is passed to the filter.\n\ | |
735 | The filter gets two arguments: the process and the string of output.\n\ | |
736 | If the process has a filter, its buffer is not used for output.") | |
4ee3e309 EN |
737 | (process, filter) |
738 | register Lisp_Object process, filter; | |
d0d6b7c5 | 739 | { |
4ee3e309 | 740 | CHECK_PROCESS (process, 0); |
20ddfff7 | 741 | if (EQ (filter, Qt)) |
a69281ff | 742 | { |
4ee3e309 EN |
743 | FD_CLR (XINT (XPROCESS (process)->infd), &input_wait_mask); |
744 | FD_CLR (XINT (XPROCESS (process)->infd), &non_keyboard_wait_mask); | |
a69281ff | 745 | } |
4ee3e309 | 746 | else if (EQ (XPROCESS (process)->filter, Qt)) |
a69281ff | 747 | { |
4ee3e309 EN |
748 | FD_SET (XINT (XPROCESS (process)->infd), &input_wait_mask); |
749 | FD_SET (XINT (XPROCESS (process)->infd), &non_keyboard_wait_mask); | |
a69281ff | 750 | } |
4ee3e309 | 751 | XPROCESS (process)->filter = filter; |
d0d6b7c5 JB |
752 | return filter; |
753 | } | |
754 | ||
755 | DEFUN ("process-filter", Fprocess_filter, Sprocess_filter, | |
756 | 1, 1, 0, | |
757 | "Returns the filter function of PROCESS; nil if none.\n\ | |
758 | See `set-process-filter' for more info on filter functions.") | |
4ee3e309 EN |
759 | (process) |
760 | register Lisp_Object process; | |
d0d6b7c5 | 761 | { |
4ee3e309 EN |
762 | CHECK_PROCESS (process, 0); |
763 | return XPROCESS (process)->filter; | |
d0d6b7c5 JB |
764 | } |
765 | ||
766 | DEFUN ("set-process-sentinel", Fset_process_sentinel, Sset_process_sentinel, | |
767 | 2, 2, 0, | |
768 | "Give PROCESS the sentinel SENTINEL; nil for none.\n\ | |
769 | The sentinel is called as a function when the process changes state.\n\ | |
770 | It gets two arguments: the process, and a string describing the change.") | |
4ee3e309 EN |
771 | (process, sentinel) |
772 | register Lisp_Object process, sentinel; | |
d0d6b7c5 | 773 | { |
4ee3e309 EN |
774 | CHECK_PROCESS (process, 0); |
775 | XPROCESS (process)->sentinel = sentinel; | |
d0d6b7c5 JB |
776 | return sentinel; |
777 | } | |
778 | ||
779 | DEFUN ("process-sentinel", Fprocess_sentinel, Sprocess_sentinel, | |
780 | 1, 1, 0, | |
781 | "Return the sentinel of PROCESS; nil if none.\n\ | |
782 | See `set-process-sentinel' for more info on sentinels.") | |
4ee3e309 EN |
783 | (process) |
784 | register Lisp_Object process; | |
d0d6b7c5 | 785 | { |
4ee3e309 EN |
786 | CHECK_PROCESS (process, 0); |
787 | return XPROCESS (process)->sentinel; | |
d0d6b7c5 JB |
788 | } |
789 | ||
396df322 RS |
790 | DEFUN ("set-process-window-size", Fset_process_window_size, |
791 | Sset_process_window_size, 3, 3, 0, | |
792 | "Tell PROCESS that it has logical window size HEIGHT and WIDTH.") | |
4ee3e309 EN |
793 | (process, height, width) |
794 | register Lisp_Object process, height, width; | |
396df322 | 795 | { |
4ee3e309 | 796 | CHECK_PROCESS (process, 0); |
396df322 RS |
797 | CHECK_NATNUM (height, 0); |
798 | CHECK_NATNUM (width, 0); | |
4ee3e309 | 799 | if (set_window_size (XINT (XPROCESS (process)->infd), |
a319f7c1 | 800 | XINT (height), XINT (width)) <= 0) |
396df322 RS |
801 | return Qnil; |
802 | else | |
803 | return Qt; | |
804 | } | |
805 | ||
52a1b894 EZ |
806 | DEFUN ("set-process-inherit-coding-system-flag", |
807 | Fset_process_inherit_coding_system_flag, | |
808 | Sset_process_inherit_coding_system_flag, 2, 2, 0, | |
809 | "Determine whether buffer of PROCESS will inherit coding-system.\n\ | |
810 | If the second argument FLAG is non-nil, then the variable\n\ | |
811 | `buffer-file-coding-system' of the buffer associated with PROCESS\n\ | |
812 | will be bound to the value of the coding system used to decode\n\ | |
813 | the process output.\n\ | |
814 | \n\ | |
815 | This is useful when the coding system specified for the process buffer\n\ | |
816 | leaves either the character code conversion or the end-of-line conversion\n\ | |
817 | unspecified, or if the coding system used to decode the process output\n\ | |
818 | is more appropriate for saving the process buffer.\n\ | |
819 | \n\ | |
820 | Binding the variable `inherit-process-coding-system' to non-nil before\n\ | |
821 | starting the process is an alternative way of setting the inherit flag\n\ | |
822 | for the process which will run.") | |
823 | (process, flag) | |
824 | register Lisp_Object process, flag; | |
825 | { | |
826 | CHECK_PROCESS (process, 0); | |
aa91317a | 827 | XPROCESS (process)->inherit_coding_system_flag = flag; |
52a1b894 EZ |
828 | return flag; |
829 | } | |
830 | ||
831 | DEFUN ("process-inherit-coding-system-flag", | |
832 | Fprocess_inherit_coding_system_flag, Sprocess_inherit_coding_system_flag, | |
833 | 1, 1, 0, | |
834 | "Return the value of inherit-coding-system flag for PROCESS.\n\ | |
835 | If this flag is t, `buffer-file-coding-system' of the buffer\n\ | |
836 | associated with PROCESS will inherit the coding system used to decode\n\ | |
837 | the process output.") | |
838 | (process) | |
839 | register Lisp_Object process; | |
840 | { | |
841 | CHECK_PROCESS (process, 0); | |
aa91317a | 842 | return XPROCESS (process)->inherit_coding_system_flag; |
52a1b894 EZ |
843 | } |
844 | ||
d0d6b7c5 JB |
845 | DEFUN ("process-kill-without-query", Fprocess_kill_without_query, |
846 | Sprocess_kill_without_query, 1, 2, 0, | |
847 | "Say no query needed if PROCESS is running when Emacs is exited.\n\ | |
f2d2dbfe | 848 | Optional second argument if non-nil says to require a query.\n\ |
d0d6b7c5 | 849 | Value is t if a query was formerly required.") |
4ee3e309 EN |
850 | (process, value) |
851 | register Lisp_Object process, value; | |
d0d6b7c5 JB |
852 | { |
853 | Lisp_Object tem; | |
854 | ||
4ee3e309 EN |
855 | CHECK_PROCESS (process, 0); |
856 | tem = XPROCESS (process)->kill_without_query; | |
857 | XPROCESS (process)->kill_without_query = Fnull (value); | |
d0d6b7c5 JB |
858 | |
859 | return Fnull (tem); | |
860 | } | |
312c9964 | 861 | |
de282a05 RS |
862 | DEFUN ("process-contact", Fprocess_contact, Sprocess_contact, |
863 | 1, 1, 0, | |
864 | "Return the contact info of PROCESS; t for a real child.\n\ | |
865 | For a net connection, the value is a cons cell of the form (HOST SERVICE).") | |
866 | (process) | |
867 | register Lisp_Object process; | |
868 | { | |
869 | CHECK_PROCESS (process, 0); | |
870 | return XPROCESS (process)->childp; | |
871 | } | |
872 | ||
312c9964 RS |
873 | #if 0 /* Turned off because we don't currently record this info |
874 | in the process. Perhaps add it. */ | |
875 | DEFUN ("process-connection", Fprocess_connection, Sprocess_connection, 1, 1, 0, | |
7744ca33 KH |
876 | "Return the connection type of PROCESS.\n\ |
877 | The value is nil for a pipe, t or `pty' for a pty, or `stream' for\n\ | |
878 | a socket connection.") | |
312c9964 RS |
879 | (process) |
880 | Lisp_Object process; | |
881 | { | |
882 | return XPROCESS (process)->type; | |
883 | } | |
884 | #endif | |
d0d6b7c5 JB |
885 | \f |
886 | Lisp_Object | |
887 | list_processes_1 () | |
888 | { | |
889 | register Lisp_Object tail, tem; | |
890 | Lisp_Object proc, minspace, tem1; | |
d0d6b7c5 | 891 | register struct Lisp_Process *p; |
d0d6b7c5 JB |
892 | char tembuf[80]; |
893 | ||
22719df2 | 894 | XSETFASTINT (minspace, 1); |
d0d6b7c5 JB |
895 | |
896 | set_buffer_internal (XBUFFER (Vstandard_output)); | |
897 | Fbuffer_disable_undo (Vstandard_output); | |
898 | ||
899 | current_buffer->truncate_lines = Qt; | |
900 | ||
901 | write_string ("\ | |
a9fde32e KH |
902 | Proc Status Buffer Tty Command\n\ |
903 | ---- ------ ------ --- -------\n", -1); | |
d0d6b7c5 JB |
904 | |
905 | for (tail = Vprocess_alist; !NILP (tail); tail = Fcdr (tail)) | |
906 | { | |
907 | Lisp_Object symbol; | |
908 | ||
909 | proc = Fcdr (Fcar (tail)); | |
910 | p = XPROCESS (proc); | |
911 | if (NILP (p->childp)) | |
912 | continue; | |
913 | ||
914 | Finsert (1, &p->name); | |
915 | Findent_to (make_number (13), minspace); | |
916 | ||
917 | if (!NILP (p->raw_status_low)) | |
918 | update_status (p); | |
919 | symbol = p->status; | |
bcd69aea | 920 | if (CONSP (p->status)) |
70949dac | 921 | symbol = XCAR (p->status); |
d0d6b7c5 JB |
922 | |
923 | ||
924 | if (EQ (symbol, Qsignal)) | |
925 | { | |
926 | Lisp_Object tem; | |
927 | tem = Fcar (Fcdr (p->status)); | |
928 | #ifdef VMS | |
929 | if (XINT (tem) < NSIG) | |
b0310da4 | 930 | write_string (sys_errlist [XINT (tem)], -1); |
d0d6b7c5 JB |
931 | else |
932 | #endif | |
933 | Fprinc (symbol, Qnil); | |
934 | } | |
935 | else if (NETCONN_P (proc)) | |
936 | { | |
937 | if (EQ (symbol, Qrun)) | |
938 | write_string ("open", -1); | |
939 | else if (EQ (symbol, Qexit)) | |
940 | write_string ("closed", -1); | |
941 | else | |
942 | Fprinc (symbol, Qnil); | |
943 | } | |
944 | else | |
945 | Fprinc (symbol, Qnil); | |
946 | ||
947 | if (EQ (symbol, Qexit)) | |
948 | { | |
949 | Lisp_Object tem; | |
950 | tem = Fcar (Fcdr (p->status)); | |
951 | if (XFASTINT (tem)) | |
952 | { | |
3162bafa | 953 | sprintf (tembuf, " %d", (int) XFASTINT (tem)); |
d0d6b7c5 JB |
954 | write_string (tembuf, -1); |
955 | } | |
956 | } | |
957 | ||
958 | if (EQ (symbol, Qsignal) || EQ (symbol, Qexit)) | |
959 | remove_process (proc); | |
960 | ||
961 | Findent_to (make_number (22), minspace); | |
962 | if (NILP (p->buffer)) | |
963 | insert_string ("(none)"); | |
964 | else if (NILP (XBUFFER (p->buffer)->name)) | |
965 | insert_string ("(Killed)"); | |
966 | else | |
967 | Finsert (1, &XBUFFER (p->buffer)->name); | |
968 | ||
969 | Findent_to (make_number (37), minspace); | |
970 | ||
a9fde32e KH |
971 | if (STRINGP (p->tty_name)) |
972 | Finsert (1, &p->tty_name); | |
973 | else | |
974 | insert_string ("(none)"); | |
975 | ||
976 | Findent_to (make_number (49), minspace); | |
977 | ||
d0d6b7c5 JB |
978 | if (NETCONN_P (proc)) |
979 | { | |
980 | sprintf (tembuf, "(network stream connection to %s)\n", | |
70949dac | 981 | XSTRING (XCAR (p->childp))->data); |
d0d6b7c5 JB |
982 | insert_string (tembuf); |
983 | } | |
984 | else | |
985 | { | |
986 | tem = p->command; | |
987 | while (1) | |
988 | { | |
989 | tem1 = Fcar (tem); | |
990 | Finsert (1, &tem1); | |
991 | tem = Fcdr (tem); | |
992 | if (NILP (tem)) | |
993 | break; | |
994 | insert_string (" "); | |
995 | } | |
996 | insert_string ("\n"); | |
997 | } | |
998 | } | |
999 | return Qnil; | |
1000 | } | |
1001 | ||
1002 | DEFUN ("list-processes", Flist_processes, Slist_processes, 0, 0, "", | |
1003 | "Display a list of all processes.\n\ | |
7744ca33 KH |
1004 | Any process listed as exited or signaled is actually eliminated\n\ |
1005 | after the listing is made.") | |
d0d6b7c5 JB |
1006 | () |
1007 | { | |
1008 | internal_with_output_to_temp_buffer ("*Process List*", | |
1009 | list_processes_1, Qnil); | |
1010 | return Qnil; | |
1011 | } | |
1012 | ||
1013 | DEFUN ("process-list", Fprocess_list, Sprocess_list, 0, 0, 0, | |
1014 | "Return a list of all processes.") | |
1015 | () | |
1016 | { | |
1017 | return Fmapcar (Qcdr, Vprocess_alist); | |
1018 | } | |
1019 | \f | |
b0310da4 JB |
1020 | /* Starting asynchronous inferior processes. */ |
1021 | ||
1022 | static Lisp_Object start_process_unwind (); | |
1023 | ||
d0d6b7c5 JB |
1024 | DEFUN ("start-process", Fstart_process, Sstart_process, 3, MANY, 0, |
1025 | "Start a program in a subprocess. Return the process object for it.\n\ | |
d0d6b7c5 JB |
1026 | NAME is name for process. It is modified if necessary to make it unique.\n\ |
1027 | BUFFER is the buffer or (buffer-name) to associate with the process.\n\ | |
1028 | Process output goes at end of that buffer, unless you specify\n\ | |
1029 | an output stream or filter function to handle the output.\n\ | |
1030 | BUFFER may be also nil, meaning that this process is not associated\n\ | |
0fa1789e | 1031 | with any buffer.\n\ |
8f1ecd05 | 1032 | Third arg is program file name. It is searched for in PATH.\n\ |
d0d6b7c5 JB |
1033 | Remaining arguments are strings to give program as arguments.") |
1034 | (nargs, args) | |
1035 | int nargs; | |
1036 | register Lisp_Object *args; | |
1037 | { | |
1e30af70 | 1038 | Lisp_Object buffer, name, program, proc, current_dir, tem; |
d0d6b7c5 JB |
1039 | #ifdef VMS |
1040 | register unsigned char *new_argv; | |
1041 | int len; | |
1042 | #else | |
1043 | register unsigned char **new_argv; | |
1044 | #endif | |
1045 | register int i; | |
b0310da4 | 1046 | int count = specpdl_ptr - specpdl; |
d0d6b7c5 JB |
1047 | |
1048 | buffer = args[1]; | |
1049 | if (!NILP (buffer)) | |
1050 | buffer = Fget_buffer_create (buffer); | |
1051 | ||
1e30af70 JB |
1052 | /* Make sure that the child will be able to chdir to the current |
1053 | buffer's current directory, or its unhandled equivalent. We | |
1054 | can't just have the child check for an error when it does the | |
1055 | chdir, since it's in a vfork. | |
1056 | ||
1057 | We have to GCPRO around this because Fexpand_file_name and | |
1058 | Funhandled_file_name_directory might call a file name handling | |
1059 | function. The argument list is protected by the caller, so all | |
1060 | we really have to worry about is buffer. */ | |
1061 | { | |
1062 | struct gcpro gcpro1, gcpro2; | |
1063 | ||
1064 | current_dir = current_buffer->directory; | |
1065 | ||
1066 | GCPRO2 (buffer, current_dir); | |
1067 | ||
7af71e17 RS |
1068 | current_dir |
1069 | = expand_and_dir_to_file (Funhandled_file_name_directory (current_dir), | |
1070 | Qnil); | |
1e30af70 JB |
1071 | if (NILP (Ffile_accessible_directory_p (current_dir))) |
1072 | report_file_error ("Setting current directory", | |
1073 | Fcons (current_buffer->directory, Qnil)); | |
1074 | ||
1075 | UNGCPRO; | |
1076 | } | |
1077 | ||
d0d6b7c5 JB |
1078 | name = args[0]; |
1079 | CHECK_STRING (name, 0); | |
1080 | ||
1081 | program = args[2]; | |
1082 | ||
1083 | CHECK_STRING (program, 2); | |
1084 | ||
1085 | #ifdef VMS | |
1086 | /* Make a one member argv with all args concatenated | |
1087 | together separated by a blank. */ | |
fc932ac6 | 1088 | len = STRING_BYTES (XSTRING (program)) + 2; |
d0d6b7c5 JB |
1089 | for (i = 3; i < nargs; i++) |
1090 | { | |
1091 | tem = args[i]; | |
1092 | CHECK_STRING (tem, i); | |
fc932ac6 | 1093 | len += STRING_BYTES (XSTRING (tem)) + 1; /* count the blank */ |
d0d6b7c5 JB |
1094 | } |
1095 | new_argv = (unsigned char *) alloca (len); | |
1096 | strcpy (new_argv, XSTRING (program)->data); | |
1097 | for (i = 3; i < nargs; i++) | |
1098 | { | |
1099 | tem = args[i]; | |
1100 | CHECK_STRING (tem, i); | |
1101 | strcat (new_argv, " "); | |
1102 | strcat (new_argv, XSTRING (tem)->data); | |
1103 | } | |
b0310da4 JB |
1104 | /* Need to add code here to check for program existence on VMS */ |
1105 | ||
d0d6b7c5 JB |
1106 | #else /* not VMS */ |
1107 | new_argv = (unsigned char **) alloca ((nargs - 1) * sizeof (char *)); | |
1108 | ||
d0d6b7c5 | 1109 | /* If program file name is not absolute, search our path for it */ |
e98d950b RS |
1110 | if (!IS_DIRECTORY_SEP (XSTRING (program)->data[0]) |
1111 | && !(XSTRING (program)->size > 1 | |
1112 | && IS_DEVICE_SEP (XSTRING (program)->data[1]))) | |
d0d6b7c5 | 1113 | { |
3b639868 KH |
1114 | struct gcpro gcpro1, gcpro2, gcpro3, gcpro4; |
1115 | ||
d0d6b7c5 | 1116 | tem = Qnil; |
3b639868 | 1117 | GCPRO4 (name, program, buffer, current_dir); |
5437e9f9 | 1118 | openp (Vexec_path, program, EXEC_SUFFIXES, &tem, 1); |
3b639868 | 1119 | UNGCPRO; |
d0d6b7c5 JB |
1120 | if (NILP (tem)) |
1121 | report_file_error ("Searching for program", Fcons (program, Qnil)); | |
f8a87498 | 1122 | tem = Fexpand_file_name (tem, Qnil); |
d0d6b7c5 JB |
1123 | new_argv[0] = XSTRING (tem)->data; |
1124 | } | |
3b639868 | 1125 | else |
13373f4e RS |
1126 | { |
1127 | if (!NILP (Ffile_directory_p (program))) | |
1128 | error ("Specified program for new process is a directory"); | |
1129 | ||
1130 | new_argv[0] = XSTRING (program)->data; | |
1131 | } | |
3b639868 KH |
1132 | |
1133 | for (i = 3; i < nargs; i++) | |
1134 | { | |
1135 | tem = args[i]; | |
1136 | CHECK_STRING (tem, i); | |
1137 | new_argv[i - 2] = XSTRING (tem)->data; | |
1138 | } | |
1139 | new_argv[i - 2] = 0; | |
d0d6b7c5 JB |
1140 | #endif /* not VMS */ |
1141 | ||
1142 | proc = make_process (name); | |
b0310da4 JB |
1143 | /* If an error occurs and we can't start the process, we want to |
1144 | remove it from the process list. This means that each error | |
1145 | check in create_process doesn't need to call remove_process | |
1146 | itself; it's all taken care of here. */ | |
1147 | record_unwind_protect (start_process_unwind, proc); | |
d0d6b7c5 JB |
1148 | |
1149 | XPROCESS (proc)->childp = Qt; | |
1150 | XPROCESS (proc)->command_channel_p = Qnil; | |
1151 | XPROCESS (proc)->buffer = buffer; | |
1152 | XPROCESS (proc)->sentinel = Qnil; | |
1153 | XPROCESS (proc)->filter = Qnil; | |
1154 | XPROCESS (proc)->command = Flist (nargs - 2, args + 2); | |
1155 | ||
7af71e17 RS |
1156 | /* Make the process marker point into the process buffer (if any). */ |
1157 | if (!NILP (buffer)) | |
d8a2934e RS |
1158 | set_marker_both (XPROCESS (proc)->mark, buffer, |
1159 | BUF_ZV (XBUFFER (buffer)), | |
1160 | BUF_ZV_BYTE (XBUFFER (buffer))); | |
7af71e17 | 1161 | |
67918941 | 1162 | { |
d5d4ae71 KH |
1163 | /* Decide coding systems for communicating with the process. Here |
1164 | we don't setup the structure coding_system nor pay attention to | |
1165 | unibyte mode. They are done in create_process. */ | |
1166 | ||
67918941 RS |
1167 | /* Qt denotes we have not yet called Ffind_operation_coding_system. */ |
1168 | Lisp_Object coding_systems = Qt; | |
1169 | Lisp_Object val, *args2; | |
1170 | struct gcpro gcpro1; | |
1171 | ||
d5d4ae71 KH |
1172 | val = Vcoding_system_for_read; |
1173 | if (NILP (val)) | |
67918941 RS |
1174 | { |
1175 | args2 = (Lisp_Object *) alloca ((nargs + 1) * sizeof *args2); | |
1176 | args2[0] = Qstart_process; | |
1177 | for (i = 0; i < nargs; i++) args2[i + 1] = args[i]; | |
1178 | GCPRO1 (proc); | |
1179 | coding_systems = Ffind_operation_coding_system (nargs + 1, args2); | |
1180 | UNGCPRO; | |
1181 | if (CONSP (coding_systems)) | |
70949dac | 1182 | val = XCAR (coding_systems); |
67918941 | 1183 | else if (CONSP (Vdefault_process_coding_system)) |
70949dac | 1184 | val = XCAR (Vdefault_process_coding_system); |
67918941 RS |
1185 | } |
1186 | XPROCESS (proc)->decode_coding_system = val; | |
1187 | ||
d5d4ae71 KH |
1188 | val = Vcoding_system_for_write; |
1189 | if (NILP (val)) | |
67918941 RS |
1190 | { |
1191 | if (EQ (coding_systems, Qt)) | |
1192 | { | |
1193 | args2 = (Lisp_Object *) alloca ((nargs + 1) * sizeof args2); | |
1194 | args2[0] = Qstart_process; | |
1195 | for (i = 0; i < nargs; i++) args2[i + 1] = args[i]; | |
1196 | GCPRO1 (proc); | |
1197 | coding_systems = Ffind_operation_coding_system (nargs + 1, args2); | |
1198 | UNGCPRO; | |
1199 | } | |
1200 | if (CONSP (coding_systems)) | |
70949dac | 1201 | val = XCDR (coding_systems); |
67918941 | 1202 | else if (CONSP (Vdefault_process_coding_system)) |
70949dac | 1203 | val = XCDR (Vdefault_process_coding_system); |
67918941 RS |
1204 | } |
1205 | XPROCESS (proc)->encode_coding_system = val; | |
1206 | } | |
0fa1789e KH |
1207 | |
1208 | XPROCESS (proc)->decoding_buf = make_uninit_string (0); | |
e7fbaa65 | 1209 | XPROCESS (proc)->decoding_carryover = make_number (0); |
0fa1789e | 1210 | XPROCESS (proc)->encoding_buf = make_uninit_string (0); |
e7fbaa65 | 1211 | XPROCESS (proc)->encoding_carryover = make_number (0); |
0fa1789e | 1212 | |
52a1b894 | 1213 | XPROCESS (proc)->inherit_coding_system_flag |
aa91317a RS |
1214 | = (NILP (buffer) || !inherit_process_coding_system |
1215 | ? Qnil : Qt); | |
52a1b894 | 1216 | |
6b53bb85 | 1217 | create_process (proc, (char **) new_argv, current_dir); |
d0d6b7c5 | 1218 | |
b0310da4 | 1219 | return unbind_to (count, proc); |
d0d6b7c5 JB |
1220 | } |
1221 | ||
b0310da4 | 1222 | /* This function is the unwind_protect form for Fstart_process. If |
8e6208c5 | 1223 | PROC doesn't have its pid set, then we know someone has signaled |
b0310da4 JB |
1224 | an error and the process wasn't started successfully, so we should |
1225 | remove it from the process list. */ | |
1226 | static Lisp_Object | |
1227 | start_process_unwind (proc) | |
1228 | Lisp_Object proc; | |
1229 | { | |
bcd69aea | 1230 | if (!PROCESSP (proc)) |
b0310da4 JB |
1231 | abort (); |
1232 | ||
1233 | /* Was PROC started successfully? */ | |
188d6c4e | 1234 | if (XINT (XPROCESS (proc)->pid) <= 0) |
b0310da4 JB |
1235 | remove_process (proc); |
1236 | ||
1237 | return Qnil; | |
1238 | } | |
1239 | ||
30904ab7 GM |
1240 | void |
1241 | create_process_1 (timer) | |
1242 | struct atimer *timer; | |
d0d6b7c5 | 1243 | { |
30904ab7 | 1244 | /* Nothing to do. */ |
d0d6b7c5 JB |
1245 | } |
1246 | ||
30904ab7 | 1247 | |
d0d6b7c5 JB |
1248 | #if 0 /* This doesn't work; see the note before sigchld_handler. */ |
1249 | #ifdef USG | |
1250 | #ifdef SIGCHLD | |
1251 | /* Mimic blocking of signals on system V, which doesn't really have it. */ | |
1252 | ||
1253 | /* Nonzero means we got a SIGCHLD when it was supposed to be blocked. */ | |
1254 | int sigchld_deferred; | |
1255 | ||
1256 | SIGTYPE | |
1257 | create_process_sigchld () | |
1258 | { | |
1259 | signal (SIGCHLD, create_process_sigchld); | |
1260 | ||
1261 | sigchld_deferred = 1; | |
1262 | } | |
1263 | #endif | |
1264 | #endif | |
1265 | #endif | |
1266 | ||
1267 | #ifndef VMS /* VMS version of this function is in vmsproc.c. */ | |
6b53bb85 | 1268 | void |
1e30af70 | 1269 | create_process (process, new_argv, current_dir) |
d0d6b7c5 JB |
1270 | Lisp_Object process; |
1271 | char **new_argv; | |
1e30af70 | 1272 | Lisp_Object current_dir; |
d0d6b7c5 | 1273 | { |
ecd1f654 | 1274 | int pid, inchannel, outchannel; |
d0d6b7c5 | 1275 | int sv[2]; |
0dc70c33 KH |
1276 | #ifdef POSIX_SIGNALS |
1277 | sigset_t procmask; | |
1278 | sigset_t blocked; | |
1279 | struct sigaction sigint_action; | |
1280 | struct sigaction sigquit_action; | |
1281 | #ifdef AIX | |
1282 | struct sigaction sighup_action; | |
1283 | #endif | |
1284 | #else /* !POSIX_SIGNALS */ | |
41d03b9a | 1285 | #if 0 |
d0d6b7c5 JB |
1286 | #ifdef SIGCHLD |
1287 | SIGTYPE (*sigchld)(); | |
1288 | #endif | |
41d03b9a | 1289 | #endif /* 0 */ |
0dc70c33 | 1290 | #endif /* !POSIX_SIGNALS */ |
ecd1f654 KH |
1291 | /* Use volatile to protect variables from being clobbered by longjmp. */ |
1292 | volatile int forkin, forkout; | |
1293 | volatile int pty_flag = 0; | |
d0d6b7c5 | 1294 | extern char **environ; |
d5d4ae71 | 1295 | Lisp_Object buffer = XPROCESS (process)->buffer; |
d0d6b7c5 | 1296 | |
d0d6b7c5 JB |
1297 | inchannel = outchannel = -1; |
1298 | ||
1299 | #ifdef HAVE_PTYS | |
fe45da4e | 1300 | if (!NILP (Vprocess_connection_type)) |
d0d6b7c5 JB |
1301 | outchannel = inchannel = allocate_pty (); |
1302 | ||
d0d6b7c5 JB |
1303 | if (inchannel >= 0) |
1304 | { | |
1305 | #ifndef USG | |
1306 | /* On USG systems it does not work to open the pty's tty here | |
1307 | and then close and reopen it in the child. */ | |
1308 | #ifdef O_NOCTTY | |
1309 | /* Don't let this terminal become our controlling terminal | |
1310 | (in case we don't have one). */ | |
68c45bf0 | 1311 | forkout = forkin = emacs_open (pty_name, O_RDWR | O_NOCTTY, 0); |
d0d6b7c5 | 1312 | #else |
68c45bf0 | 1313 | forkout = forkin = emacs_open (pty_name, O_RDWR, 0); |
d0d6b7c5 JB |
1314 | #endif |
1315 | if (forkin < 0) | |
1316 | report_file_error ("Opening pty", Qnil); | |
1317 | #else | |
1318 | forkin = forkout = -1; | |
1319 | #endif /* not USG */ | |
1320 | pty_flag = 1; | |
1321 | } | |
1322 | else | |
1323 | #endif /* HAVE_PTYS */ | |
1324 | #ifdef SKTPAIR | |
1325 | { | |
1326 | if (socketpair (AF_UNIX, SOCK_STREAM, 0, sv) < 0) | |
1327 | report_file_error ("Opening socketpair", Qnil); | |
1328 | outchannel = inchannel = sv[0]; | |
1329 | forkout = forkin = sv[1]; | |
1330 | } | |
1331 | #else /* not SKTPAIR */ | |
1332 | { | |
fc14013c KH |
1333 | int tem; |
1334 | tem = pipe (sv); | |
1335 | if (tem < 0) | |
1336 | report_file_error ("Creating pipe", Qnil); | |
d0d6b7c5 JB |
1337 | inchannel = sv[0]; |
1338 | forkout = sv[1]; | |
fc14013c KH |
1339 | tem = pipe (sv); |
1340 | if (tem < 0) | |
1341 | { | |
68c45bf0 PE |
1342 | emacs_close (inchannel); |
1343 | emacs_close (forkout); | |
fc14013c KH |
1344 | report_file_error ("Creating pipe", Qnil); |
1345 | } | |
d0d6b7c5 JB |
1346 | outchannel = sv[1]; |
1347 | forkin = sv[0]; | |
1348 | } | |
1349 | #endif /* not SKTPAIR */ | |
1350 | ||
1351 | #if 0 | |
1352 | /* Replaced by close_process_descs */ | |
1353 | set_exclusive_use (inchannel); | |
1354 | set_exclusive_use (outchannel); | |
1355 | #endif | |
1356 | ||
1357 | /* Stride people say it's a mystery why this is needed | |
1358 | as well as the O_NDELAY, but that it fails without this. */ | |
1359 | #if defined (STRIDE) || (defined (pfa) && defined (HAVE_PTYS)) | |
1360 | { | |
1361 | int one = 1; | |
1362 | ioctl (inchannel, FIONBIO, &one); | |
1363 | } | |
1364 | #endif | |
1365 | ||
1366 | #ifdef O_NONBLOCK | |
1367 | fcntl (inchannel, F_SETFL, O_NONBLOCK); | |
03832893 | 1368 | fcntl (outchannel, F_SETFL, O_NONBLOCK); |
d0d6b7c5 JB |
1369 | #else |
1370 | #ifdef O_NDELAY | |
1371 | fcntl (inchannel, F_SETFL, O_NDELAY); | |
03832893 | 1372 | fcntl (outchannel, F_SETFL, O_NDELAY); |
d0d6b7c5 JB |
1373 | #endif |
1374 | #endif | |
1375 | ||
1376 | /* Record this as an active process, with its channels. | |
1377 | As a result, child_setup will close Emacs's side of the pipes. */ | |
1378 | chan_process[inchannel] = process; | |
1d056e64 KH |
1379 | XSETINT (XPROCESS (process)->infd, inchannel); |
1380 | XSETINT (XPROCESS (process)->outfd, outchannel); | |
d0d6b7c5 JB |
1381 | /* Record the tty descriptor used in the subprocess. */ |
1382 | if (forkin < 0) | |
1383 | XPROCESS (process)->subtty = Qnil; | |
1384 | else | |
22719df2 | 1385 | XSETFASTINT (XPROCESS (process)->subtty, forkin); |
d0d6b7c5 JB |
1386 | XPROCESS (process)->pty_flag = (pty_flag ? Qt : Qnil); |
1387 | XPROCESS (process)->status = Qrun; | |
c7580538 KH |
1388 | if (!proc_decode_coding_system[inchannel]) |
1389 | proc_decode_coding_system[inchannel] | |
1390 | = (struct coding_system *) xmalloc (sizeof (struct coding_system)); | |
0fa1789e | 1391 | setup_coding_system (XPROCESS (process)->decode_coding_system, |
c7580538 KH |
1392 | proc_decode_coding_system[inchannel]); |
1393 | if (!proc_encode_coding_system[outchannel]) | |
929a6726 RS |
1394 | proc_encode_coding_system[outchannel] |
1395 | = (struct coding_system *) xmalloc (sizeof (struct coding_system)); | |
0fa1789e | 1396 | setup_coding_system (XPROCESS (process)->encode_coding_system, |
c7580538 | 1397 | proc_encode_coding_system[outchannel]); |
d0d6b7c5 | 1398 | |
41d03b9a | 1399 | if ((!NILP (buffer) && NILP (XBUFFER (buffer)->enable_multibyte_characters)) |
d5d4ae71 KH |
1400 | || (NILP (buffer) && NILP (buffer_defaults.enable_multibyte_characters))) |
1401 | { | |
1402 | /* In unibyte mode, character code conversion should not take | |
1403 | place but EOL conversion should. So, setup raw-text or one | |
1404 | of the subsidiary according to the information just setup. */ | |
10af5b4c | 1405 | if (!NILP (XPROCESS (process)->decode_coding_system)) |
d5d4ae71 | 1406 | setup_raw_text_coding_system (proc_decode_coding_system[inchannel]); |
10af5b4c | 1407 | if (!NILP (XPROCESS (process)->encode_coding_system)) |
7c5e21ab | 1408 | setup_raw_text_coding_system (proc_encode_coding_system[outchannel]); |
d5d4ae71 KH |
1409 | } |
1410 | ||
1a283a4c KH |
1411 | if (CODING_REQUIRE_ENCODING (proc_encode_coding_system[outchannel])) |
1412 | { | |
1413 | /* Here we encode arguments by the coding system used for | |
1414 | sending data to the process. We don't support using | |
1415 | different coding systems for encoding arguments and for | |
1416 | encoding data sent to the process. */ | |
1417 | struct gcpro gcpro1; | |
1418 | int i = 1; | |
1419 | struct coding_system *coding = proc_encode_coding_system[outchannel]; | |
1420 | ||
e7fbaa65 | 1421 | coding->mode |= CODING_MODE_LAST_BLOCK; |
1a283a4c KH |
1422 | GCPRO1 (process); |
1423 | while (new_argv[i] != 0) | |
1424 | { | |
1425 | int len = strlen (new_argv[i]); | |
1426 | int size = encoding_buffer_size (coding, len); | |
1427 | unsigned char *buf = (unsigned char *) alloca (size); | |
1a283a4c | 1428 | |
833d591d | 1429 | encode_coding (coding, (unsigned char *)new_argv[i], buf, len, size); |
e7fbaa65 | 1430 | buf[coding->produced] = 0; |
1a283a4c KH |
1431 | /* We don't have to free new_argv[i] because it points to a |
1432 | Lisp string given as an argument to `start-process'. */ | |
833d591d | 1433 | new_argv[i++] = (char *) buf; |
1a283a4c KH |
1434 | } |
1435 | UNGCPRO; | |
e7fbaa65 | 1436 | coding->mode &= ~CODING_MODE_LAST_BLOCK; |
1a283a4c KH |
1437 | } |
1438 | ||
d0d6b7c5 JB |
1439 | /* Delay interrupts until we have a chance to store |
1440 | the new fork's pid in its process structure */ | |
0dc70c33 KH |
1441 | #ifdef POSIX_SIGNALS |
1442 | sigemptyset (&blocked); | |
1443 | #ifdef SIGCHLD | |
1444 | sigaddset (&blocked, SIGCHLD); | |
1445 | #endif | |
1446 | #ifdef HAVE_VFORK | |
1447 | /* On many hosts (e.g. Solaris 2.4), if a vforked child calls `signal', | |
1448 | this sets the parent's signal handlers as well as the child's. | |
1449 | So delay all interrupts whose handlers the child might munge, | |
1450 | and record the current handlers so they can be restored later. */ | |
1451 | sigaddset (&blocked, SIGINT ); sigaction (SIGINT , 0, &sigint_action ); | |
1452 | sigaddset (&blocked, SIGQUIT); sigaction (SIGQUIT, 0, &sigquit_action); | |
1453 | #ifdef AIX | |
1454 | sigaddset (&blocked, SIGHUP ); sigaction (SIGHUP , 0, &sighup_action ); | |
1455 | #endif | |
1456 | #endif /* HAVE_VFORK */ | |
1457 | sigprocmask (SIG_BLOCK, &blocked, &procmask); | |
1458 | #else /* !POSIX_SIGNALS */ | |
d0d6b7c5 JB |
1459 | #ifdef SIGCHLD |
1460 | #ifdef BSD4_1 | |
1461 | sighold (SIGCHLD); | |
1462 | #else /* not BSD4_1 */ | |
6df54671 | 1463 | #if defined (BSD_SYSTEM) || defined (UNIPLUS) || defined (HPUX) |
d0d6b7c5 JB |
1464 | sigsetmask (sigmask (SIGCHLD)); |
1465 | #else /* ordinary USG */ | |
1466 | #if 0 | |
1467 | sigchld_deferred = 0; | |
1468 | sigchld = signal (SIGCHLD, create_process_sigchld); | |
1469 | #endif | |
1470 | #endif /* ordinary USG */ | |
1471 | #endif /* not BSD4_1 */ | |
1472 | #endif /* SIGCHLD */ | |
0dc70c33 | 1473 | #endif /* !POSIX_SIGNALS */ |
d0d6b7c5 | 1474 | |
3081bf8d | 1475 | FD_SET (inchannel, &input_wait_mask); |
a69281ff | 1476 | FD_SET (inchannel, &non_keyboard_wait_mask); |
3081bf8d KH |
1477 | if (inchannel > max_process_desc) |
1478 | max_process_desc = inchannel; | |
1479 | ||
d0d6b7c5 JB |
1480 | /* Until we store the proper pid, enable sigchld_handler |
1481 | to recognize an unknown pid as standing for this process. | |
1482 | It is very important not to let this `marker' value stay | |
1483 | in the table after this function has returned; if it does | |
1484 | it might cause call-process to hang and subsequent asynchronous | |
1485 | processes to get their return values scrambled. */ | |
1486 | XSETINT (XPROCESS (process)->pid, -1); | |
1487 | ||
ececcbec RS |
1488 | BLOCK_INPUT; |
1489 | ||
d0d6b7c5 JB |
1490 | { |
1491 | /* child_setup must clobber environ on systems with true vfork. | |
1492 | Protect it from permanent change. */ | |
1493 | char **save_environ = environ; | |
1494 | ||
14dc6093 | 1495 | current_dir = ENCODE_FILE (current_dir); |
a932f187 | 1496 | |
e98d950b | 1497 | #ifndef WINDOWSNT |
d0d6b7c5 JB |
1498 | pid = vfork (); |
1499 | if (pid == 0) | |
e98d950b | 1500 | #endif /* not WINDOWSNT */ |
d0d6b7c5 JB |
1501 | { |
1502 | int xforkin = forkin; | |
1503 | int xforkout = forkout; | |
1504 | ||
1505 | #if 0 /* This was probably a mistake--it duplicates code later on, | |
1506 | but fails to handle all the cases. */ | |
1507 | /* Make sure SIGCHLD is not blocked in the child. */ | |
1508 | sigsetmask (SIGEMPTYMASK); | |
1509 | #endif | |
1510 | ||
1511 | /* Make the pty be the controlling terminal of the process. */ | |
1512 | #ifdef HAVE_PTYS | |
1513 | /* First, disconnect its current controlling terminal. */ | |
1514 | #ifdef HAVE_SETSID | |
7ce48618 RS |
1515 | /* We tried doing setsid only if pty_flag, but it caused |
1516 | process_set_signal to fail on SGI when using a pipe. */ | |
1517 | setsid (); | |
ce4c9c90 | 1518 | /* Make the pty's terminal the controlling terminal. */ |
084fd64a | 1519 | if (pty_flag) |
39e9ebcd | 1520 | { |
39e9ebcd RS |
1521 | #ifdef TIOCSCTTY |
1522 | /* We ignore the return value | |
1523 | because faith@cs.unc.edu says that is necessary on Linux. */ | |
1524 | ioctl (xforkin, TIOCSCTTY, 0); | |
ce4c9c90 | 1525 | #endif |
39e9ebcd | 1526 | } |
d0d6b7c5 | 1527 | #else /* not HAVE_SETSID */ |
c14e53a4 | 1528 | #ifdef USG |
000ab717 | 1529 | /* It's very important to call setpgrp here and no time |
d0d6b7c5 JB |
1530 | afterwards. Otherwise, we lose our controlling tty which |
1531 | is set when we open the pty. */ | |
1532 | setpgrp (); | |
1533 | #endif /* USG */ | |
1534 | #endif /* not HAVE_SETSID */ | |
9bcf8ec6 KH |
1535 | #if defined (HAVE_TERMIOS) && defined (LDISC1) |
1536 | if (pty_flag && xforkin >= 0) | |
1537 | { | |
1538 | struct termios t; | |
1539 | tcgetattr (xforkin, &t); | |
1540 | t.c_lflag = LDISC1; | |
1541 | if (tcsetattr (xforkin, TCSANOW, &t) < 0) | |
68c45bf0 | 1542 | emacs_write (1, "create_process/tcsetattr LDISC1 failed\n", 39); |
9bcf8ec6 KH |
1543 | } |
1544 | #else | |
aafadd9f | 1545 | #if defined (NTTYDISC) && defined (TIOCSETD) |
ff773a4e | 1546 | if (pty_flag && xforkin >= 0) |
afc549fd RS |
1547 | { |
1548 | /* Use new line discipline. */ | |
1549 | int ldisc = NTTYDISC; | |
4458f555 | 1550 | ioctl (xforkin, TIOCSETD, &ldisc); |
afc549fd | 1551 | } |
000ab717 | 1552 | #endif |
9bcf8ec6 | 1553 | #endif |
d0d6b7c5 JB |
1554 | #ifdef TIOCNOTTY |
1555 | /* In 4.3BSD, the TIOCSPGRP bug has been fixed, and now you | |
1556 | can do TIOCSPGRP only to the process's controlling tty. */ | |
1557 | if (pty_flag) | |
1558 | { | |
1559 | /* I wonder: would just ioctl (0, TIOCNOTTY, 0) work here? | |
1560 | I can't test it since I don't have 4.3. */ | |
68c45bf0 | 1561 | int j = emacs_open ("/dev/tty", O_RDWR, 0); |
d0d6b7c5 | 1562 | ioctl (j, TIOCNOTTY, 0); |
68c45bf0 | 1563 | emacs_close (j); |
5a570e37 | 1564 | #ifndef USG |
d0d6b7c5 JB |
1565 | /* In order to get a controlling terminal on some versions |
1566 | of BSD, it is necessary to put the process in pgrp 0 | |
1567 | before it opens the terminal. */ | |
99c1aeca | 1568 | #ifdef HAVE_SETPGID |
3ea1d291 RS |
1569 | setpgid (0, 0); |
1570 | #else | |
d0d6b7c5 | 1571 | setpgrp (0, 0); |
3ea1d291 | 1572 | #endif |
d0d6b7c5 JB |
1573 | #endif |
1574 | } | |
1575 | #endif /* TIOCNOTTY */ | |
1576 | ||
99153b9e | 1577 | #if !defined (RTU) && !defined (UNIPLUS) && !defined (DONT_REOPEN_PTY) |
d0d6b7c5 | 1578 | /*** There is a suggestion that this ought to be a |
99153b9e RS |
1579 | conditional on TIOCSPGRP, |
1580 | or !(defined (HAVE_SETSID) && defined (TIOCSCTTY)). | |
1581 | Trying the latter gave the wrong results on Debian GNU/Linux 1.1; | |
1582 | that system does seem to need this code, even though | |
1583 | both HAVE_SETSID and TIOCSCTTY are defined. */ | |
d0d6b7c5 JB |
1584 | /* Now close the pty (if we had it open) and reopen it. |
1585 | This makes the pty the controlling terminal of the subprocess. */ | |
1586 | if (pty_flag) | |
1587 | { | |
99e3d726 RS |
1588 | #ifdef SET_CHILD_PTY_PGRP |
1589 | int pgrp = getpid (); | |
1590 | #endif | |
1591 | ||
68c45bf0 PE |
1592 | /* I wonder if emacs_close (emacs_open (pty_name, ...)) |
1593 | would work? */ | |
d0d6b7c5 | 1594 | if (xforkin >= 0) |
68c45bf0 PE |
1595 | emacs_close (xforkin); |
1596 | xforkout = xforkin = emacs_open (pty_name, O_RDWR, 0); | |
d0d6b7c5 | 1597 | |
4aa54ba8 RS |
1598 | if (xforkin < 0) |
1599 | { | |
68c45bf0 PE |
1600 | emacs_write (1, "Couldn't open the pty terminal ", 31); |
1601 | emacs_write (1, pty_name, strlen (pty_name)); | |
1602 | emacs_write (1, "\n", 1); | |
4aa54ba8 RS |
1603 | _exit (1); |
1604 | } | |
1605 | ||
99e3d726 RS |
1606 | #ifdef SET_CHILD_PTY_PGRP |
1607 | ioctl (xforkin, TIOCSPGRP, &pgrp); | |
1608 | ioctl (xforkout, TIOCSPGRP, &pgrp); | |
1609 | #endif | |
d0d6b7c5 | 1610 | } |
99153b9e | 1611 | #endif /* not UNIPLUS and not RTU and not DONT_REOPEN_PTY */ |
e9bf058b | 1612 | |
d0d6b7c5 | 1613 | #ifdef SETUP_SLAVE_PTY |
13a72104 RS |
1614 | if (pty_flag) |
1615 | { | |
1616 | SETUP_SLAVE_PTY; | |
1617 | } | |
d0d6b7c5 JB |
1618 | #endif /* SETUP_SLAVE_PTY */ |
1619 | #ifdef AIX | |
1620 | /* On AIX, we've disabled SIGHUP above once we start a child on a pty. | |
1621 | Now reenable it in the child, so it will die when we want it to. */ | |
1622 | if (pty_flag) | |
1623 | signal (SIGHUP, SIG_DFL); | |
1624 | #endif | |
1625 | #endif /* HAVE_PTYS */ | |
1626 | ||
0dc70c33 KH |
1627 | signal (SIGINT, SIG_DFL); |
1628 | signal (SIGQUIT, SIG_DFL); | |
1629 | ||
1630 | /* Stop blocking signals in the child. */ | |
1631 | #ifdef POSIX_SIGNALS | |
1632 | sigprocmask (SIG_SETMASK, &procmask, 0); | |
1633 | #else /* !POSIX_SIGNALS */ | |
d0d6b7c5 JB |
1634 | #ifdef SIGCHLD |
1635 | #ifdef BSD4_1 | |
1636 | sigrelse (SIGCHLD); | |
1637 | #else /* not BSD4_1 */ | |
6df54671 | 1638 | #if defined (BSD_SYSTEM) || defined (UNIPLUS) || defined (HPUX) |
d0d6b7c5 JB |
1639 | sigsetmask (SIGEMPTYMASK); |
1640 | #else /* ordinary USG */ | |
63528b78 | 1641 | #if 0 |
d0d6b7c5 | 1642 | signal (SIGCHLD, sigchld); |
63528b78 | 1643 | #endif |
d0d6b7c5 JB |
1644 | #endif /* ordinary USG */ |
1645 | #endif /* not BSD4_1 */ | |
1646 | #endif /* SIGCHLD */ | |
0dc70c33 | 1647 | #endif /* !POSIX_SIGNALS */ |
5e7e1da2 | 1648 | |
ab01d0a8 RS |
1649 | if (pty_flag) |
1650 | child_setup_tty (xforkout); | |
e98d950b RS |
1651 | #ifdef WINDOWSNT |
1652 | pid = child_setup (xforkin, xforkout, xforkout, | |
1653 | new_argv, 1, current_dir); | |
1654 | #else /* not WINDOWSNT */ | |
d0d6b7c5 | 1655 | child_setup (xforkin, xforkout, xforkout, |
e065a56e | 1656 | new_argv, 1, current_dir); |
e98d950b | 1657 | #endif /* not WINDOWSNT */ |
d0d6b7c5 JB |
1658 | } |
1659 | environ = save_environ; | |
1660 | } | |
1661 | ||
ececcbec RS |
1662 | UNBLOCK_INPUT; |
1663 | ||
4a127b3b | 1664 | /* This runs in the Emacs process. */ |
d0d6b7c5 | 1665 | if (pid < 0) |
6311cf58 RS |
1666 | { |
1667 | if (forkin >= 0) | |
68c45bf0 | 1668 | emacs_close (forkin); |
6311cf58 | 1669 | if (forkin != forkout && forkout >= 0) |
68c45bf0 | 1670 | emacs_close (forkout); |
6311cf58 | 1671 | } |
4a127b3b KH |
1672 | else |
1673 | { | |
1674 | /* vfork succeeded. */ | |
1675 | XSETFASTINT (XPROCESS (process)->pid, pid); | |
d0d6b7c5 | 1676 | |
e98d950b | 1677 | #ifdef WINDOWSNT |
4a127b3b | 1678 | register_child (pid, inchannel); |
e98d950b RS |
1679 | #endif /* WINDOWSNT */ |
1680 | ||
4a127b3b KH |
1681 | /* If the subfork execv fails, and it exits, |
1682 | this close hangs. I don't know why. | |
1683 | So have an interrupt jar it loose. */ | |
30904ab7 GM |
1684 | { |
1685 | struct atimer *timer; | |
1686 | EMACS_TIME offset; | |
1687 | ||
1688 | stop_polling (); | |
1689 | EMACS_SET_SECS_USECS (offset, 1, 0); | |
1690 | timer = start_atimer (ATIMER_RELATIVE, offset, create_process_1, 0); | |
1691 | ||
1692 | XPROCESS (process)->subtty = Qnil; | |
1693 | if (forkin >= 0) | |
1694 | emacs_close (forkin); | |
1695 | ||
1696 | cancel_atimer (timer); | |
1697 | start_polling (); | |
1698 | } | |
1699 | ||
4a127b3b | 1700 | if (forkin != forkout && forkout >= 0) |
68c45bf0 | 1701 | emacs_close (forkout); |
d0d6b7c5 | 1702 | |
875e6b94 | 1703 | #ifdef HAVE_PTYS |
4a127b3b KH |
1704 | if (pty_flag) |
1705 | XPROCESS (process)->tty_name = build_string (pty_name); | |
1706 | else | |
875e6b94 | 1707 | #endif |
4a127b3b KH |
1708 | XPROCESS (process)->tty_name = Qnil; |
1709 | } | |
3b9a3dfa | 1710 | |
4a127b3b KH |
1711 | /* Restore the signal state whether vfork succeeded or not. |
1712 | (We will signal an error, below, if it failed.) */ | |
0dc70c33 KH |
1713 | #ifdef POSIX_SIGNALS |
1714 | #ifdef HAVE_VFORK | |
1715 | /* Restore the parent's signal handlers. */ | |
1716 | sigaction (SIGINT, &sigint_action, 0); | |
1717 | sigaction (SIGQUIT, &sigquit_action, 0); | |
1718 | #ifdef AIX | |
1719 | sigaction (SIGHUP, &sighup_action, 0); | |
1720 | #endif | |
1721 | #endif /* HAVE_VFORK */ | |
1722 | /* Stop blocking signals in the parent. */ | |
1723 | sigprocmask (SIG_SETMASK, &procmask, 0); | |
1724 | #else /* !POSIX_SIGNALS */ | |
d0d6b7c5 JB |
1725 | #ifdef SIGCHLD |
1726 | #ifdef BSD4_1 | |
1727 | sigrelse (SIGCHLD); | |
1728 | #else /* not BSD4_1 */ | |
6df54671 | 1729 | #if defined (BSD_SYSTEM) || defined (UNIPLUS) || defined (HPUX) |
d0d6b7c5 JB |
1730 | sigsetmask (SIGEMPTYMASK); |
1731 | #else /* ordinary USG */ | |
1732 | #if 0 | |
1733 | signal (SIGCHLD, sigchld); | |
1734 | /* Now really handle any of these signals | |
1735 | that came in during this function. */ | |
1736 | if (sigchld_deferred) | |
1737 | kill (getpid (), SIGCHLD); | |
1738 | #endif | |
1739 | #endif /* ordinary USG */ | |
1740 | #endif /* not BSD4_1 */ | |
1741 | #endif /* SIGCHLD */ | |
0dc70c33 | 1742 | #endif /* !POSIX_SIGNALS */ |
4a127b3b KH |
1743 | |
1744 | /* Now generate the error if vfork failed. */ | |
1745 | if (pid < 0) | |
1746 | report_file_error ("Doing vfork", Qnil); | |
d0d6b7c5 JB |
1747 | } |
1748 | #endif /* not VMS */ | |
1749 | ||
1750 | #ifdef HAVE_SOCKETS | |
1751 | ||
1752 | /* open a TCP network connection to a given HOST/SERVICE. Treated | |
1753 | exactly like a normal process when reading and writing. Only | |
1754 | differences are in status display and process deletion. A network | |
1755 | connection has no PID; you cannot signal it. All you can do is | |
1756 | deactivate and close it via delete-process */ | |
1757 | ||
1758 | DEFUN ("open-network-stream", Fopen_network_stream, Sopen_network_stream, | |
1759 | 4, 4, 0, | |
1760 | "Open a TCP connection for a service to a host.\n\ | |
1761 | Returns a subprocess-object to represent the connection.\n\ | |
1762 | Input and output work as for subprocesses; `delete-process' closes it.\n\ | |
1763 | Args are NAME BUFFER HOST SERVICE.\n\ | |
1764 | NAME is name for process. It is modified if necessary to make it unique.\n\ | |
1765 | BUFFER is the buffer (or buffer-name) to associate with the process.\n\ | |
1766 | Process output goes at end of that buffer, unless you specify\n\ | |
1767 | an output stream or filter function to handle the output.\n\ | |
1768 | BUFFER may be also nil, meaning that this process is not associated\n\ | |
1769 | with any buffer\n\ | |
1770 | Third arg is name of the host to connect to, or its IP address.\n\ | |
1771 | Fourth arg SERVICE is name of the service desired, or an integer\n\ | |
1772 | specifying a port number to connect to.") | |
1773 | (name, buffer, host, service) | |
1774 | Lisp_Object name, buffer, host, service; | |
1775 | { | |
1776 | Lisp_Object proc; | |
a319f7c1 | 1777 | #ifndef HAVE_GETADDRINFO |
d0d6b7c5 JB |
1778 | struct sockaddr_in address; |
1779 | struct servent *svc_info; | |
1780 | struct hostent *host_info_ptr, host_info; | |
1781 | char *(addr_list[2]); | |
79967d5e | 1782 | IN_ADDR numeric_addr; |
a319f7c1 | 1783 | int port; |
418b48fd | 1784 | #else /* HAVE_GETADDRINFO */ |
a319f7c1 KH |
1785 | struct addrinfo hints, *res, *lres; |
1786 | int ret = 0; | |
1787 | int xerrno = 0; | |
418b48fd KH |
1788 | char *portstring, portbuf[128]; |
1789 | #endif /* HAVE_GETADDRINFO */ | |
1790 | int s = -1, outch, inch; | |
d0d6b7c5 | 1791 | struct gcpro gcpro1, gcpro2, gcpro3, gcpro4; |
e333e864 | 1792 | int retry = 0; |
44ade2e9 | 1793 | int count = specpdl_ptr - specpdl; |
5684cd6e | 1794 | int count1; |
d0d6b7c5 | 1795 | |
bff3ed0a RS |
1796 | #ifdef WINDOWSNT |
1797 | /* Ensure socket support is loaded if available. */ | |
1798 | init_winsock (TRUE); | |
1799 | #endif | |
1800 | ||
d0d6b7c5 JB |
1801 | GCPRO4 (name, buffer, host, service); |
1802 | CHECK_STRING (name, 0); | |
1803 | CHECK_STRING (host, 0); | |
a319f7c1 KH |
1804 | |
1805 | #ifdef HAVE_GETADDRINFO | |
1806 | /* | |
1807 | * SERVICE can either be a string or int. | |
1808 | * Convert to a C string for later use by getaddrinfo. | |
1809 | */ | |
1810 | if (INTEGERP (service)) | |
1811 | { | |
1812 | sprintf (portbuf, "%d", XINT (service)); | |
1813 | portstring = portbuf; | |
1814 | } | |
1815 | else | |
1816 | { | |
1817 | CHECK_STRING (service, 0); | |
1818 | portstring = XSTRING (service)->data; | |
1819 | } | |
1820 | #else /* ! HAVE_GETADDRINFO */ | |
bcd69aea | 1821 | if (INTEGERP (service)) |
d0d6b7c5 JB |
1822 | port = htons ((unsigned short) XINT (service)); |
1823 | else | |
1824 | { | |
1825 | CHECK_STRING (service, 0); | |
1826 | svc_info = getservbyname (XSTRING (service)->data, "tcp"); | |
1827 | if (svc_info == 0) | |
1828 | error ("Unknown service \"%s\"", XSTRING (service)->data); | |
1829 | port = svc_info->s_port; | |
1830 | } | |
a319f7c1 KH |
1831 | #endif /* ! HAVE_GETADDRINFO */ |
1832 | ||
d0d6b7c5 | 1833 | |
798b64bb KH |
1834 | /* Slow down polling to every ten seconds. |
1835 | Some kernels have a bug which causes retrying connect to fail | |
1836 | after a connect. Polling can interfere with gethostbyname too. */ | |
1837 | #ifdef POLL_FOR_INPUT | |
4cf3fa08 | 1838 | record_unwind_protect (unwind_stop_other_atimers, Qnil); |
798b64bb KH |
1839 | bind_polling_period (10); |
1840 | #endif | |
1841 | ||
1d2c16fa | 1842 | #ifndef TERM |
a319f7c1 KH |
1843 | #ifdef HAVE_GETADDRINFO |
1844 | { | |
1845 | immediate_quit = 1; | |
1846 | QUIT; | |
1847 | memset (&hints, 0, sizeof (hints)); | |
418b48fd | 1848 | hints.ai_flags = 0; |
a319f7c1 KH |
1849 | hints.ai_family = AF_UNSPEC; |
1850 | hints.ai_socktype = SOCK_STREAM; | |
1851 | hints.ai_protocol = 0; | |
1852 | ret = getaddrinfo (XSTRING (host)->data, portstring, &hints, &res); | |
a319f7c1 KH |
1853 | if (ret) |
1854 | { | |
1855 | error ("%s/%s %s", XSTRING (host)->data, portstring, | |
1db972cb | 1856 | strerror (ret)); |
a319f7c1 KH |
1857 | } |
1858 | immediate_quit = 0; | |
1859 | } | |
1860 | ||
5684cd6e AS |
1861 | s = -1; |
1862 | count1 = specpdl_ptr - specpdl; | |
1863 | record_unwind_protect (close_file_unwind, make_number (s)); | |
1864 | ||
418b48fd | 1865 | for (lres = res; lres; lres = lres->ai_next) |
a319f7c1 KH |
1866 | { |
1867 | s = socket (lres->ai_family, lres->ai_socktype, lres->ai_protocol); | |
1868 | if (s < 0) | |
418b48fd | 1869 | continue; |
a319f7c1 KH |
1870 | |
1871 | /* Kernel bugs (on Ultrix at least) cause lossage (not just EINTR) | |
1872 | when connect is interrupted. So let's not let it get interrupted. | |
1873 | Note we do not turn off polling, because polling is only used | |
1874 | when not interrupt_input, and thus not normally used on the systems | |
1875 | which have this bug. On systems which use polling, there's no way | |
1876 | to quit if polling is turned off. */ | |
1877 | if (interrupt_input) | |
1878 | unrequest_sigio (); | |
1879 | ||
a319f7c1 KH |
1880 | immediate_quit = 1; |
1881 | QUIT; | |
1882 | ||
1883 | ret = connect (s, lres->ai_addr, lres->ai_addrlen); | |
418b48fd | 1884 | if (ret == 0) |
a319f7c1 | 1885 | break; |
68c45bf0 | 1886 | emacs_close (s); |
418b48fd KH |
1887 | s = -1; |
1888 | } | |
1889 | ||
a319f7c1 | 1890 | freeaddrinfo (res); |
418b48fd | 1891 | if (s < 0) |
a319f7c1 KH |
1892 | { |
1893 | if (interrupt_input) | |
1894 | request_sigio (); | |
1895 | ||
1896 | errno = xerrno; | |
1897 | report_file_error ("connection failed", | |
1898 | Fcons (host, Fcons (name, Qnil))); | |
1899 | } | |
1900 | #else /* ! HAVE_GETADDRINFO */ | |
1901 | ||
616da37c RS |
1902 | while (1) |
1903 | { | |
45f93416 | 1904 | #if 0 |
5f0929a7 RS |
1905 | #ifdef TRY_AGAIN |
1906 | h_errno = 0; | |
45f93416 | 1907 | #endif |
5f0929a7 | 1908 | #endif |
5d6c2aa3 RS |
1909 | immediate_quit = 1; |
1910 | QUIT; | |
616da37c | 1911 | host_info_ptr = gethostbyname (XSTRING (host)->data); |
5d6c2aa3 | 1912 | immediate_quit = 0; |
45f93416 | 1913 | #if 0 |
616da37c RS |
1914 | #ifdef TRY_AGAIN |
1915 | if (! (host_info_ptr == 0 && h_errno == TRY_AGAIN)) | |
45f93416 | 1916 | #endif |
616da37c RS |
1917 | #endif |
1918 | break; | |
1919 | Fsleep_for (make_number (1), Qnil); | |
1920 | } | |
d0d6b7c5 JB |
1921 | if (host_info_ptr == 0) |
1922 | /* Attempt to interpret host as numeric inet address */ | |
1923 | { | |
393a9679 | 1924 | numeric_addr = inet_addr ((char *) XSTRING (host)->data); |
79967d5e | 1925 | if (NUMERIC_ADDR_ERROR) |
d0d6b7c5 JB |
1926 | error ("Unknown host \"%s\"", XSTRING (host)->data); |
1927 | ||
1928 | host_info_ptr = &host_info; | |
1929 | host_info.h_name = 0; | |
1930 | host_info.h_aliases = 0; | |
1931 | host_info.h_addrtype = AF_INET; | |
39a21be6 JB |
1932 | #ifdef h_addr |
1933 | /* Older machines have only one address slot called h_addr. | |
1934 | Newer machines have h_addr_list, but #define h_addr to | |
1935 | be its first element. */ | |
1936 | host_info.h_addr_list = &(addr_list[0]); | |
1937 | #endif | |
1938 | host_info.h_addr = (char*)(&numeric_addr); | |
d0d6b7c5 | 1939 | addr_list[1] = 0; |
8777fbe2 RS |
1940 | /* numeric_addr isn't null-terminated; it has fixed length. */ |
1941 | host_info.h_length = sizeof (numeric_addr); | |
d0d6b7c5 JB |
1942 | } |
1943 | ||
1944 | bzero (&address, sizeof address); | |
1945 | bcopy (host_info_ptr->h_addr, (char *) &address.sin_addr, | |
1946 | host_info_ptr->h_length); | |
1947 | address.sin_family = host_info_ptr->h_addrtype; | |
1948 | address.sin_port = port; | |
1949 | ||
1950 | s = socket (host_info_ptr->h_addrtype, SOCK_STREAM, 0); | |
1951 | if (s < 0) | |
1952 | report_file_error ("error creating socket", Fcons (name, Qnil)); | |
1953 | ||
5684cd6e AS |
1954 | count1 = specpdl_ptr - specpdl; |
1955 | record_unwind_protect (close_file_unwind, make_number (s)); | |
1956 | ||
457a9bee RS |
1957 | /* Kernel bugs (on Ultrix at least) cause lossage (not just EINTR) |
1958 | when connect is interrupted. So let's not let it get interrupted. | |
1959 | Note we do not turn off polling, because polling is only used | |
1960 | when not interrupt_input, and thus not normally used on the systems | |
1961 | which have this bug. On systems which use polling, there's no way | |
1962 | to quit if polling is turned off. */ | |
1963 | if (interrupt_input) | |
1964 | unrequest_sigio (); | |
1965 | ||
d0d6b7c5 | 1966 | loop: |
0f2ee0c1 RS |
1967 | |
1968 | immediate_quit = 1; | |
1969 | QUIT; | |
1970 | ||
e333e864 RS |
1971 | if (connect (s, (struct sockaddr *) &address, sizeof address) == -1 |
1972 | && errno != EISCONN) | |
d0d6b7c5 JB |
1973 | { |
1974 | int xerrno = errno; | |
e333e864 | 1975 | |
0f2ee0c1 RS |
1976 | immediate_quit = 0; |
1977 | ||
d0d6b7c5 JB |
1978 | if (errno == EINTR) |
1979 | goto loop; | |
e333e864 RS |
1980 | if (errno == EADDRINUSE && retry < 20) |
1981 | { | |
4590788a RS |
1982 | /* A delay here is needed on some FreeBSD systems, |
1983 | and it is harmless, since this retrying takes time anyway | |
1984 | and should be infrequent. */ | |
1985 | Fsleep_for (make_number (1), Qnil); | |
e333e864 RS |
1986 | retry++; |
1987 | goto loop; | |
1988 | } | |
1989 | ||
5684cd6e AS |
1990 | /* Discard the unwind protect. */ |
1991 | specpdl_ptr = specpdl + count1; | |
1992 | ||
68c45bf0 | 1993 | emacs_close (s); |
457a9bee RS |
1994 | |
1995 | if (interrupt_input) | |
1996 | request_sigio (); | |
1997 | ||
d0d6b7c5 JB |
1998 | errno = xerrno; |
1999 | report_file_error ("connection failed", | |
2000 | Fcons (host, Fcons (name, Qnil))); | |
2001 | } | |
a319f7c1 | 2002 | #endif /* ! HAVE_GETADDRINFO */ |
457a9bee | 2003 | |
0f2ee0c1 RS |
2004 | immediate_quit = 0; |
2005 | ||
5684cd6e AS |
2006 | /* Discard the unwind protect. */ |
2007 | specpdl_ptr = specpdl + count1; | |
2008 | ||
44ade2e9 RS |
2009 | #ifdef POLL_FOR_INPUT |
2010 | unbind_to (count, Qnil); | |
2011 | #endif | |
2012 | ||
457a9bee RS |
2013 | if (interrupt_input) |
2014 | request_sigio (); | |
2015 | ||
1d2c16fa RS |
2016 | #else /* TERM */ |
2017 | s = connect_server (0); | |
2018 | if (s < 0) | |
2019 | report_file_error ("error creating socket", Fcons (name, Qnil)); | |
2020 | send_command (s, C_PORT, 0, "%s:%d", XSTRING (host)->data, ntohs (port)); | |
2021 | send_command (s, C_DUMB, 1, 0); | |
2022 | #endif /* TERM */ | |
d0d6b7c5 JB |
2023 | |
2024 | inch = s; | |
59f23005 | 2025 | outch = s; |
d0d6b7c5 JB |
2026 | |
2027 | if (!NILP (buffer)) | |
2028 | buffer = Fget_buffer_create (buffer); | |
2029 | proc = make_process (name); | |
2030 | ||
2031 | chan_process[inch] = proc; | |
2032 | ||
2033 | #ifdef O_NONBLOCK | |
2034 | fcntl (inch, F_SETFL, O_NONBLOCK); | |
2035 | #else | |
2036 | #ifdef O_NDELAY | |
2037 | fcntl (inch, F_SETFL, O_NDELAY); | |
2038 | #endif | |
2039 | #endif | |
2040 | ||
de282a05 | 2041 | XPROCESS (proc)->childp = Fcons (host, Fcons (service, Qnil)); |
d0d6b7c5 JB |
2042 | XPROCESS (proc)->command_channel_p = Qnil; |
2043 | XPROCESS (proc)->buffer = buffer; | |
2044 | XPROCESS (proc)->sentinel = Qnil; | |
2045 | XPROCESS (proc)->filter = Qnil; | |
2046 | XPROCESS (proc)->command = Qnil; | |
2047 | XPROCESS (proc)->pid = Qnil; | |
7795ff9b | 2048 | XSETINT (XPROCESS (proc)->infd, inch); |
1d056e64 | 2049 | XSETINT (XPROCESS (proc)->outfd, outch); |
d0d6b7c5 JB |
2050 | XPROCESS (proc)->status = Qrun; |
2051 | FD_SET (inch, &input_wait_mask); | |
a69281ff | 2052 | FD_SET (inch, &non_keyboard_wait_mask); |
7d0e672e RS |
2053 | if (inch > max_process_desc) |
2054 | max_process_desc = inch; | |
d0d6b7c5 | 2055 | |
67918941 RS |
2056 | { |
2057 | /* Setup coding systems for communicating with the network stream. */ | |
2058 | struct gcpro gcpro1; | |
2059 | /* Qt denotes we have not yet called Ffind_operation_coding_system. */ | |
2060 | Lisp_Object coding_systems = Qt; | |
2061 | Lisp_Object args[5], val; | |
2062 | ||
2063 | if (!NILP (Vcoding_system_for_read)) | |
2064 | val = Vcoding_system_for_read; | |
41d03b9a GM |
2065 | else if ((!NILP (buffer) && NILP (XBUFFER (buffer)->enable_multibyte_characters)) |
2066 | || (NILP (buffer) && NILP (buffer_defaults.enable_multibyte_characters))) | |
67918941 RS |
2067 | /* We dare not decode end-of-line format by setting VAL to |
2068 | Qraw_text, because the existing Emacs Lisp libraries | |
2069 | assume that they receive bare code including a sequene of | |
2070 | CR LF. */ | |
2071 | val = Qnil; | |
2072 | else | |
2073 | { | |
2074 | args[0] = Qopen_network_stream, args[1] = name, | |
2075 | args[2] = buffer, args[3] = host, args[4] = service; | |
2076 | GCPRO1 (proc); | |
2077 | coding_systems = Ffind_operation_coding_system (5, args); | |
2078 | UNGCPRO; | |
2079 | if (CONSP (coding_systems)) | |
70949dac | 2080 | val = XCAR (coding_systems); |
67918941 | 2081 | else if (CONSP (Vdefault_process_coding_system)) |
70949dac | 2082 | val = XCAR (Vdefault_process_coding_system); |
67918941 RS |
2083 | else |
2084 | val = Qnil; | |
2085 | } | |
2086 | XPROCESS (proc)->decode_coding_system = val; | |
0fa1789e | 2087 | |
67918941 RS |
2088 | if (!NILP (Vcoding_system_for_write)) |
2089 | val = Vcoding_system_for_write; | |
2090 | else if (NILP (current_buffer->enable_multibyte_characters)) | |
2091 | val = Qnil; | |
2092 | else | |
2093 | { | |
2094 | if (EQ (coding_systems, Qt)) | |
2095 | { | |
2096 | args[0] = Qopen_network_stream, args[1] = name, | |
2097 | args[2] = buffer, args[3] = host, args[4] = service; | |
2098 | GCPRO1 (proc); | |
2099 | coding_systems = Ffind_operation_coding_system (5, args); | |
2100 | UNGCPRO; | |
2101 | } | |
2102 | if (CONSP (coding_systems)) | |
70949dac | 2103 | val = XCDR (coding_systems); |
67918941 | 2104 | else if (CONSP (Vdefault_process_coding_system)) |
70949dac | 2105 | val = XCDR (Vdefault_process_coding_system); |
67918941 RS |
2106 | else |
2107 | val = Qnil; | |
2108 | } | |
2109 | XPROCESS (proc)->encode_coding_system = val; | |
2110 | } | |
0fa1789e | 2111 | |
c7580538 KH |
2112 | if (!proc_decode_coding_system[inch]) |
2113 | proc_decode_coding_system[inch] | |
2114 | = (struct coding_system *) xmalloc (sizeof (struct coding_system)); | |
0fa1789e | 2115 | setup_coding_system (XPROCESS (proc)->decode_coding_system, |
c7580538 KH |
2116 | proc_decode_coding_system[inch]); |
2117 | if (!proc_encode_coding_system[outch]) | |
2118 | proc_encode_coding_system[outch] | |
2119 | = (struct coding_system *) xmalloc (sizeof (struct coding_system)); | |
0fa1789e | 2120 | setup_coding_system (XPROCESS (proc)->encode_coding_system, |
c7580538 | 2121 | proc_encode_coding_system[outch]); |
0fa1789e KH |
2122 | |
2123 | XPROCESS (proc)->decoding_buf = make_uninit_string (0); | |
e7fbaa65 | 2124 | XPROCESS (proc)->decoding_carryover = make_number (0); |
0fa1789e | 2125 | XPROCESS (proc)->encoding_buf = make_uninit_string (0); |
e7fbaa65 | 2126 | XPROCESS (proc)->encoding_carryover = make_number (0); |
0fa1789e | 2127 | |
aa91317a RS |
2128 | XPROCESS (proc)->inherit_coding_system_flag |
2129 | = (NILP (buffer) || !inherit_process_coding_system | |
2130 | ? Qnil : Qt); | |
52a1b894 | 2131 | |
d0d6b7c5 JB |
2132 | UNGCPRO; |
2133 | return proc; | |
2134 | } | |
2135 | #endif /* HAVE_SOCKETS */ | |
2136 | ||
6b53bb85 | 2137 | void |
d0d6b7c5 JB |
2138 | deactivate_process (proc) |
2139 | Lisp_Object proc; | |
2140 | { | |
2141 | register int inchannel, outchannel; | |
2142 | register struct Lisp_Process *p = XPROCESS (proc); | |
2143 | ||
a9f2c884 RS |
2144 | inchannel = XINT (p->infd); |
2145 | outchannel = XINT (p->outfd); | |
d0d6b7c5 | 2146 | |
a9f2c884 | 2147 | if (inchannel >= 0) |
d0d6b7c5 JB |
2148 | { |
2149 | /* Beware SIGCHLD hereabouts. */ | |
2150 | flush_pending_output (inchannel); | |
2151 | #ifdef VMS | |
2152 | { | |
2153 | VMS_PROC_STUFF *get_vms_process_pointer (), *vs; | |
2154 | sys$dassgn (outchannel); | |
c6c6865d | 2155 | vs = get_vms_process_pointer (p->pid); |
d0d6b7c5 JB |
2156 | if (vs) |
2157 | give_back_vms_process_stuff (vs); | |
2158 | } | |
2159 | #else | |
68c45bf0 | 2160 | emacs_close (inchannel); |
a9f2c884 | 2161 | if (outchannel >= 0 && outchannel != inchannel) |
68c45bf0 | 2162 | emacs_close (outchannel); |
d0d6b7c5 JB |
2163 | #endif |
2164 | ||
1d056e64 KH |
2165 | XSETINT (p->infd, -1); |
2166 | XSETINT (p->outfd, -1); | |
d0d6b7c5 JB |
2167 | chan_process[inchannel] = Qnil; |
2168 | FD_CLR (inchannel, &input_wait_mask); | |
a69281ff | 2169 | FD_CLR (inchannel, &non_keyboard_wait_mask); |
7d0e672e RS |
2170 | if (inchannel == max_process_desc) |
2171 | { | |
2172 | int i; | |
2173 | /* We just closed the highest-numbered process input descriptor, | |
2174 | so recompute the highest-numbered one now. */ | |
2175 | max_process_desc = 0; | |
2176 | for (i = 0; i < MAXDESC; i++) | |
2177 | if (!NILP (chan_process[i])) | |
2178 | max_process_desc = i; | |
2179 | } | |
d0d6b7c5 JB |
2180 | } |
2181 | } | |
2182 | ||
2183 | /* Close all descriptors currently in use for communication | |
2184 | with subprocess. This is used in a newly-forked subprocess | |
2185 | to get rid of irrelevant descriptors. */ | |
2186 | ||
6b53bb85 | 2187 | void |
d0d6b7c5 JB |
2188 | close_process_descs () |
2189 | { | |
e98d950b | 2190 | #ifndef WINDOWSNT |
d0d6b7c5 JB |
2191 | int i; |
2192 | for (i = 0; i < MAXDESC; i++) | |
2193 | { | |
2194 | Lisp_Object process; | |
2195 | process = chan_process[i]; | |
2196 | if (!NILP (process)) | |
2197 | { | |
a9f2c884 RS |
2198 | int in = XINT (XPROCESS (process)->infd); |
2199 | int out = XINT (XPROCESS (process)->outfd); | |
2200 | if (in >= 0) | |
68c45bf0 | 2201 | emacs_close (in); |
a9f2c884 | 2202 | if (out >= 0 && in != out) |
68c45bf0 | 2203 | emacs_close (out); |
d0d6b7c5 JB |
2204 | } |
2205 | } | |
e98d950b | 2206 | #endif |
d0d6b7c5 JB |
2207 | } |
2208 | \f | |
2209 | DEFUN ("accept-process-output", Faccept_process_output, Saccept_process_output, | |
2210 | 0, 3, 0, | |
2211 | "Allow any pending output from subprocesses to be read by Emacs.\n\ | |
2212 | It is read into the process' buffers or given to their filter functions.\n\ | |
2213 | Non-nil arg PROCESS means do not return until some output has been received\n\ | |
2214 | from PROCESS.\n\ | |
2215 | Non-nil second arg TIMEOUT and third arg TIMEOUT-MSECS are number of\n\ | |
2216 | seconds and microseconds to wait; return after that much time whether\n\ | |
2217 | or not there is input.\n\ | |
2218 | Return non-nil iff we received any output before the timeout expired.") | |
4ee3e309 EN |
2219 | (process, timeout, timeout_msecs) |
2220 | register Lisp_Object process, timeout, timeout_msecs; | |
d0d6b7c5 JB |
2221 | { |
2222 | int seconds; | |
2223 | int useconds; | |
2224 | ||
0748d150 RS |
2225 | if (! NILP (process)) |
2226 | CHECK_PROCESS (process, 0); | |
2227 | ||
d0d6b7c5 JB |
2228 | if (! NILP (timeout_msecs)) |
2229 | { | |
2230 | CHECK_NUMBER (timeout_msecs, 2); | |
2231 | useconds = XINT (timeout_msecs); | |
bcd69aea | 2232 | if (!INTEGERP (timeout)) |
1d056e64 | 2233 | XSETINT (timeout, 0); |
d0d6b7c5 JB |
2234 | |
2235 | { | |
2236 | int carry = useconds / 1000000; | |
2237 | ||
2238 | XSETINT (timeout, XINT (timeout) + carry); | |
2239 | useconds -= carry * 1000000; | |
2240 | ||
2241 | /* I think this clause is necessary because C doesn't | |
2242 | guarantee a particular rounding direction for negative | |
2243 | integers. */ | |
2244 | if (useconds < 0) | |
2245 | { | |
2246 | XSETINT (timeout, XINT (timeout) - 1); | |
2247 | useconds += 1000000; | |
2248 | } | |
2249 | } | |
2250 | } | |
de946e5a RS |
2251 | else |
2252 | useconds = 0; | |
d0d6b7c5 JB |
2253 | |
2254 | if (! NILP (timeout)) | |
2255 | { | |
2256 | CHECK_NUMBER (timeout, 1); | |
2257 | seconds = XINT (timeout); | |
ada9a4fd | 2258 | if (seconds < 0 || (seconds == 0 && useconds == 0)) |
d0d6b7c5 JB |
2259 | seconds = -1; |
2260 | } | |
2261 | else | |
2262 | { | |
4ee3e309 | 2263 | if (NILP (process)) |
d0d6b7c5 JB |
2264 | seconds = -1; |
2265 | else | |
2266 | seconds = 0; | |
2267 | } | |
2268 | ||
4ee3e309 EN |
2269 | if (NILP (process)) |
2270 | XSETFASTINT (process, 0); | |
f76475ad | 2271 | |
d0d6b7c5 | 2272 | return |
4ee3e309 | 2273 | (wait_reading_process_input (seconds, useconds, process, 0) |
d0d6b7c5 JB |
2274 | ? Qt : Qnil); |
2275 | } | |
2276 | ||
2277 | /* This variable is different from waiting_for_input in keyboard.c. | |
2278 | It is used to communicate to a lisp process-filter/sentinel (via the | |
2279 | function Fwaiting_for_user_input_p below) whether emacs was waiting | |
2280 | for user-input when that process-filter was called. | |
2281 | waiting_for_input cannot be used as that is by definition 0 when | |
d430ee71 RS |
2282 | lisp code is being evalled. |
2283 | This is also used in record_asynch_buffer_change. | |
2284 | For that purpose, this must be 0 | |
2285 | when not inside wait_reading_process_input. */ | |
d0d6b7c5 JB |
2286 | static int waiting_for_user_input_p; |
2287 | ||
c573ae8e | 2288 | /* This is here so breakpoints can be put on it. */ |
dfcf069d | 2289 | static void |
c573ae8e RS |
2290 | wait_reading_process_input_1 () |
2291 | { | |
2292 | } | |
2293 | ||
d0d6b7c5 JB |
2294 | /* Read and dispose of subprocess output while waiting for timeout to |
2295 | elapse and/or keyboard input to be available. | |
2296 | ||
de6fd4b9 | 2297 | TIME_LIMIT is: |
d0d6b7c5 JB |
2298 | timeout in seconds, or |
2299 | zero for no limit, or | |
2300 | -1 means gobble data immediately available but don't wait for any. | |
2301 | ||
de6fd4b9 RS |
2302 | MICROSECS is: |
2303 | an additional duration to wait, measured in microseconds. | |
2304 | If this is nonzero and time_limit is 0, then the timeout | |
2305 | consists of MICROSECS only. | |
6e4f3667 | 2306 | |
de6fd4b9 | 2307 | READ_KBD is a lisp value: |
d0d6b7c5 JB |
2308 | 0 to ignore keyboard input, or |
2309 | 1 to return when input is available, or | |
84aa3ace | 2310 | -1 meaning caller will actually read the input, so don't throw to |
d0d6b7c5 | 2311 | the quit handler, or |
e6194ffc | 2312 | a cons cell, meaning wait until its car is non-nil |
de6fd4b9 | 2313 | (and gobble terminal input into the buffer if any arrives), or |
f76475ad JB |
2314 | a process object, meaning wait until something arrives from that |
2315 | process. The return value is true iff we read some input from | |
2316 | that process. | |
d0d6b7c5 | 2317 | |
de6fd4b9 | 2318 | DO_DISPLAY != 0 means redisplay should be done to show subprocess |
d0d6b7c5 JB |
2319 | output that arrives. |
2320 | ||
de6fd4b9 | 2321 | If READ_KBD is a pointer to a struct Lisp_Process, then the |
d0d6b7c5 JB |
2322 | function returns true iff we received input from that process |
2323 | before the timeout elapsed. | |
eb8c3be9 | 2324 | Otherwise, return true iff we received input from any process. */ |
d0d6b7c5 | 2325 | |
dfcf069d | 2326 | int |
d0d6b7c5 | 2327 | wait_reading_process_input (time_limit, microsecs, read_kbd, do_display) |
f76475ad JB |
2328 | int time_limit, microsecs; |
2329 | Lisp_Object read_kbd; | |
2330 | int do_display; | |
d0d6b7c5 | 2331 | { |
41d03b9a | 2332 | register int channel, nfds; |
d0d6b7c5 JB |
2333 | static SELECT_TYPE Available; |
2334 | int xerrno; | |
2335 | Lisp_Object proc; | |
41d03b9a | 2336 | EMACS_TIME timeout, end_time; |
d0d6b7c5 | 2337 | SELECT_TYPE Atemp; |
a9f2c884 | 2338 | int wait_channel = -1; |
d0d6b7c5 JB |
2339 | struct Lisp_Process *wait_proc = 0; |
2340 | int got_some_input = 0; | |
84aa3ace | 2341 | Lisp_Object *wait_for_cell = 0; |
d0d6b7c5 JB |
2342 | |
2343 | FD_ZERO (&Available); | |
2344 | ||
f76475ad JB |
2345 | /* If read_kbd is a process to watch, set wait_proc and wait_channel |
2346 | accordingly. */ | |
bcd69aea | 2347 | if (PROCESSP (read_kbd)) |
d0d6b7c5 | 2348 | { |
f76475ad | 2349 | wait_proc = XPROCESS (read_kbd); |
a9f2c884 | 2350 | wait_channel = XINT (wait_proc->infd); |
22719df2 | 2351 | XSETFASTINT (read_kbd, 0); |
d0d6b7c5 JB |
2352 | } |
2353 | ||
84aa3ace | 2354 | /* If waiting for non-nil in a cell, record where. */ |
bcd69aea | 2355 | if (CONSP (read_kbd)) |
84aa3ace | 2356 | { |
70949dac | 2357 | wait_for_cell = &XCAR (read_kbd); |
22719df2 | 2358 | XSETFASTINT (read_kbd, 0); |
84aa3ace RS |
2359 | } |
2360 | ||
f76475ad | 2361 | waiting_for_user_input_p = XINT (read_kbd); |
d0d6b7c5 JB |
2362 | |
2363 | /* Since we may need to wait several times, | |
2364 | compute the absolute time to return at. */ | |
2365 | if (time_limit || microsecs) | |
2366 | { | |
2367 | EMACS_GET_TIME (end_time); | |
2368 | EMACS_SET_SECS_USECS (timeout, time_limit, microsecs); | |
2369 | EMACS_ADD_TIME (end_time, end_time, timeout); | |
2370 | } | |
e07d5449 KH |
2371 | #ifdef hpux |
2372 | /* AlainF 5-Jul-1996 | |
2373 | HP-UX 10.10 seem to have problems with signals coming in | |
2374 | Causes "poll: interrupted system call" messages when Emacs is run | |
2375 | in an X window | |
2376 | Turn off periodic alarms (in case they are in use) */ | |
30904ab7 | 2377 | turn_on_atimers (0); |
e07d5449 | 2378 | #endif |
d0d6b7c5 | 2379 | |
d0d6b7c5 JB |
2380 | while (1) |
2381 | { | |
c0239a0b RS |
2382 | int timeout_reduced_for_timers = 0; |
2383 | ||
d0d6b7c5 JB |
2384 | /* If calling from keyboard input, do not quit |
2385 | since we want to return C-g as an input character. | |
2386 | Otherwise, do pending quit if requested. */ | |
f76475ad | 2387 | if (XINT (read_kbd) >= 0) |
d0d6b7c5 JB |
2388 | QUIT; |
2389 | ||
889255b4 RS |
2390 | /* Exit now if the cell we're waiting for became non-nil. */ |
2391 | if (wait_for_cell && ! NILP (*wait_for_cell)) | |
2392 | break; | |
2393 | ||
d0d6b7c5 JB |
2394 | /* Compute time from now till when time limit is up */ |
2395 | /* Exit if already run out */ | |
2396 | if (time_limit == -1) | |
2397 | { | |
2398 | /* -1 specified for timeout means | |
2399 | gobble output available now | |
2400 | but don't wait at all. */ | |
2401 | ||
2402 | EMACS_SET_SECS_USECS (timeout, 0, 0); | |
2403 | } | |
2404 | else if (time_limit || microsecs) | |
2405 | { | |
2406 | EMACS_GET_TIME (timeout); | |
2407 | EMACS_SUB_TIME (timeout, end_time, timeout); | |
2408 | if (EMACS_TIME_NEG_P (timeout)) | |
2409 | break; | |
2410 | } | |
2411 | else | |
2412 | { | |
2413 | EMACS_SET_SECS_USECS (timeout, 100000, 0); | |
2414 | } | |
2415 | ||
f854a00b RS |
2416 | /* Normally we run timers here. |
2417 | But not if wait_for_cell; in those cases, | |
2418 | the wait is supposed to be short, | |
2419 | and those callers cannot handle running arbitrary Lisp code here. */ | |
2420 | if (! wait_for_cell) | |
fb4c3627 | 2421 | { |
c0239a0b | 2422 | EMACS_TIME timer_delay; |
c573ae8e RS |
2423 | int old_timers_run; |
2424 | ||
2425 | retry: | |
2426 | old_timers_run = timers_run; | |
c0239a0b | 2427 | timer_delay = timer_check (1); |
5de50bfb | 2428 | if (timers_run != old_timers_run && do_display) |
c573ae8e RS |
2429 | { |
2430 | redisplay_preserve_echo_area (); | |
2431 | /* We must retry, since a timer may have requeued itself | |
2432 | and that could alter the time_delay. */ | |
2433 | goto retry; | |
2434 | } | |
2435 | ||
69645afc RS |
2436 | /* If there is unread keyboard input, also return. */ |
2437 | if (XINT (read_kbd) != 0 | |
2438 | && requeued_events_pending_p ()) | |
2439 | break; | |
2440 | ||
c0239a0b | 2441 | if (! EMACS_TIME_NEG_P (timer_delay) && time_limit != -1) |
fb4c3627 RS |
2442 | { |
2443 | EMACS_TIME difference; | |
2444 | EMACS_SUB_TIME (difference, timer_delay, timeout); | |
2445 | if (EMACS_TIME_NEG_P (difference)) | |
c0239a0b RS |
2446 | { |
2447 | timeout = timer_delay; | |
2448 | timeout_reduced_for_timers = 1; | |
2449 | } | |
fb4c3627 | 2450 | } |
4abca5e7 RS |
2451 | /* If time_limit is -1, we are not going to wait at all. */ |
2452 | else if (time_limit != -1) | |
c573ae8e RS |
2453 | { |
2454 | /* This is so a breakpoint can be put here. */ | |
2455 | wait_reading_process_input_1 (); | |
2456 | } | |
fb4c3627 RS |
2457 | } |
2458 | ||
90ab1a81 JB |
2459 | /* Cause C-g and alarm signals to take immediate action, |
2460 | and cause input available signals to zero out timeout. | |
2461 | ||
2462 | It is important that we do this before checking for process | |
2463 | activity. If we get a SIGCHLD after the explicit checks for | |
2464 | process activity, timeout is the only way we will know. */ | |
2465 | if (XINT (read_kbd) < 0) | |
2466 | set_waiting_for_input (&timeout); | |
2467 | ||
6be429b1 JB |
2468 | /* If status of something has changed, and no input is |
2469 | available, notify the user of the change right away. After | |
2470 | this explicit check, we'll let the SIGCHLD handler zap | |
2471 | timeout to get our attention. */ | |
2472 | if (update_tick != process_tick && do_display) | |
2473 | { | |
2474 | Atemp = input_wait_mask; | |
2475 | EMACS_SET_SECS_USECS (timeout, 0, 0); | |
0c9960e9 RS |
2476 | if ((select (max (max_process_desc, max_keyboard_desc) + 1, |
2477 | &Atemp, (SELECT_TYPE *)0, (SELECT_TYPE *)0, | |
ecd1f654 KH |
2478 | &timeout) |
2479 | <= 0)) | |
90ab1a81 JB |
2480 | { |
2481 | /* It's okay for us to do this and then continue with | |
a0e4d3f3 | 2482 | the loop, since timeout has already been zeroed out. */ |
90ab1a81 JB |
2483 | clear_waiting_for_input (); |
2484 | status_notify (); | |
2485 | } | |
6be429b1 JB |
2486 | } |
2487 | ||
2488 | /* Don't wait for output from a non-running process. */ | |
2489 | if (wait_proc != 0 && !NILP (wait_proc->raw_status_low)) | |
2490 | update_status (wait_proc); | |
2491 | if (wait_proc != 0 | |
2492 | && ! EQ (wait_proc->status, Qrun)) | |
9aa2a7f4 | 2493 | { |
215b45e9 | 2494 | int nread, total_nread = 0; |
7ce63188 | 2495 | |
9aa2a7f4 | 2496 | clear_waiting_for_input (); |
7ce63188 RS |
2497 | XSETPROCESS (proc, wait_proc); |
2498 | ||
2499 | /* Read data from the process, until we exhaust it. */ | |
e1b37c34 | 2500 | while (XINT (wait_proc->infd) >= 0) |
215b45e9 | 2501 | { |
e1b37c34 GM |
2502 | nread = read_process_output (proc, XINT (wait_proc->infd)); |
2503 | ||
2504 | if (nread == 0) | |
2505 | break; | |
2506 | ||
215b45e9 RS |
2507 | if (0 < nread) |
2508 | total_nread += nread; | |
2509 | #ifdef EIO | |
2510 | else if (nread == -1 && EIO == errno) | |
2511 | break; | |
e1b37c34 GM |
2512 | #endif |
2513 | #ifdef EAGAIN | |
2514 | else if (nread == -1 && EAGAIN == errno) | |
2515 | break; | |
2516 | #endif | |
2517 | #ifdef EWOULDBLOCK | |
2518 | else if (nread == -1 && EWOULDBLOCK == errno) | |
2519 | break; | |
215b45e9 RS |
2520 | #endif |
2521 | } | |
7ce63188 RS |
2522 | if (total_nread > 0 && do_display) |
2523 | redisplay_preserve_echo_area (); | |
2524 | ||
9aa2a7f4 JB |
2525 | break; |
2526 | } | |
6be429b1 | 2527 | |
d0d6b7c5 JB |
2528 | /* Wait till there is something to do */ |
2529 | ||
b5dc1c83 RS |
2530 | if (wait_for_cell) |
2531 | Available = non_process_wait_mask; | |
2532 | else if (! XINT (read_kbd)) | |
a69281ff RS |
2533 | Available = non_keyboard_wait_mask; |
2534 | else | |
2535 | Available = input_wait_mask; | |
d0d6b7c5 | 2536 | |
ff11dfa1 | 2537 | /* If frame size has changed or the window is newly mapped, |
ffd56f97 JB |
2538 | redisplay now, before we start to wait. There is a race |
2539 | condition here; if a SIGIO arrives between now and the select | |
016899c0 JB |
2540 | and indicates that a frame is trashed, the select may block |
2541 | displaying a trashed screen. */ | |
5164ee8e | 2542 | if (frame_garbaged && do_display) |
7286affd RS |
2543 | { |
2544 | clear_waiting_for_input (); | |
2545 | redisplay_preserve_echo_area (); | |
2546 | if (XINT (read_kbd) < 0) | |
7efe788e | 2547 | set_waiting_for_input (&timeout); |
7286affd | 2548 | } |
ffd56f97 | 2549 | |
0a65b032 RS |
2550 | if (XINT (read_kbd) && detect_input_pending ()) |
2551 | { | |
2552 | nfds = 0; | |
2553 | FD_ZERO (&Available); | |
2554 | } | |
2555 | else | |
0c9960e9 RS |
2556 | nfds = select (max (max_process_desc, max_keyboard_desc) + 1, |
2557 | &Available, (SELECT_TYPE *)0, (SELECT_TYPE *)0, | |
0a65b032 | 2558 | &timeout); |
6720a7fb | 2559 | |
d0d6b7c5 JB |
2560 | xerrno = errno; |
2561 | ||
2562 | /* Make C-g and alarm signals set flags again */ | |
2563 | clear_waiting_for_input (); | |
2564 | ||
2565 | /* If we woke up due to SIGWINCH, actually change size now. */ | |
2b653806 | 2566 | do_pending_window_change (0); |
d0d6b7c5 | 2567 | |
c0239a0b RS |
2568 | if (time_limit && nfds == 0 && ! timeout_reduced_for_timers) |
2569 | /* We wanted the full specified time, so return now. */ | |
d0d6b7c5 JB |
2570 | break; |
2571 | if (nfds < 0) | |
2572 | { | |
2573 | if (xerrno == EINTR) | |
2574 | FD_ZERO (&Available); | |
b0310da4 JB |
2575 | #ifdef ultrix |
2576 | /* Ultrix select seems to return ENOMEM when it is | |
2577 | interrupted. Treat it just like EINTR. Bleah. Note | |
2578 | that we want to test for the "ultrix" CPP symbol, not | |
2579 | "__ultrix__"; the latter is only defined under GCC, but | |
2580 | not by DEC's bundled CC. -JimB */ | |
8058415c JB |
2581 | else if (xerrno == ENOMEM) |
2582 | FD_ZERO (&Available); | |
2583 | #endif | |
d0d6b7c5 JB |
2584 | #ifdef ALLIANT |
2585 | /* This happens for no known reason on ALLIANT. | |
2586 | I am guessing that this is the right response. -- RMS. */ | |
2587 | else if (xerrno == EFAULT) | |
2588 | FD_ZERO (&Available); | |
2589 | #endif | |
2590 | else if (xerrno == EBADF) | |
2591 | { | |
2592 | #ifdef AIX | |
2593 | /* AIX doesn't handle PTY closure the same way BSD does. On AIX, | |
2594 | the child's closure of the pts gives the parent a SIGHUP, and | |
2595 | the ptc file descriptor is automatically closed, | |
2596 | yielding EBADF here or at select() call above. | |
2597 | So, SIGHUP is ignored (see def of PTY_TTY_NAME_SPRINTF | |
a0e4d3f3 | 2598 | in m/ibmrt-aix.h), and here we just ignore the select error. |
d0d6b7c5 | 2599 | Cleanup occurs c/o status_notify after SIGCLD. */ |
ffd56f97 | 2600 | FD_ZERO (&Available); /* Cannot depend on values returned */ |
d0d6b7c5 JB |
2601 | #else |
2602 | abort (); | |
2603 | #endif | |
2604 | } | |
2605 | else | |
68c45bf0 | 2606 | error ("select error: %s", emacs_strerror (xerrno)); |
d0d6b7c5 | 2607 | } |
26ec91de | 2608 | #if defined(sun) && !defined(USG5_4) |
a69281ff | 2609 | else if (nfds > 0 && keyboard_bit_set (&Available) |
dd2281ae | 2610 | && interrupt_input) |
e0109153 JB |
2611 | /* System sometimes fails to deliver SIGIO. |
2612 | ||
2613 | David J. Mackenzie says that Emacs doesn't compile under | |
2614 | Solaris if this code is enabled, thus the USG5_4 in the CPP | |
2615 | conditional. "I haven't noticed any ill effects so far. | |
2616 | If you find a Solaris expert somewhere, they might know | |
2617 | better." */ | |
d0d6b7c5 JB |
2618 | kill (getpid (), SIGIO); |
2619 | #endif | |
2620 | ||
5d5beb62 RS |
2621 | #if 0 /* When polling is used, interrupt_input is 0, |
2622 | so get_input_pending should read the input. | |
2623 | So this should not be needed. */ | |
2624 | /* If we are using polling for input, | |
2625 | and we see input available, make it get read now. | |
2626 | Otherwise it might not actually get read for a second. | |
2627 | And on hpux, since we turn off polling in wait_reading_process_input, | |
2628 | it might never get read at all if we don't spend much time | |
2629 | outside of wait_reading_process_input. */ | |
2630 | if (XINT (read_kbd) && interrupt_input | |
2631 | && keyboard_bit_set (&Available) | |
2632 | && input_polling_used ()) | |
2633 | kill (getpid (), SIGALRM); | |
2634 | #endif | |
2635 | ||
d0d6b7c5 JB |
2636 | /* Check for keyboard input */ |
2637 | /* If there is any, return immediately | |
2638 | to give it higher priority than subprocesses */ | |
2639 | ||
77e1b3d4 | 2640 | if (XINT (read_kbd) != 0 |
5d6c2aa3 | 2641 | && detect_input_pending_run_timers (do_display)) |
6ed6233b KH |
2642 | { |
2643 | swallow_events (do_display); | |
5d6c2aa3 | 2644 | if (detect_input_pending_run_timers (do_display)) |
6ed6233b KH |
2645 | break; |
2646 | } | |
2647 | ||
69645afc RS |
2648 | /* If there is unread keyboard input, also return. */ |
2649 | if (XINT (read_kbd) != 0 | |
2650 | && requeued_events_pending_p ()) | |
2651 | break; | |
2652 | ||
77e1b3d4 RS |
2653 | /* If we are not checking for keyboard input now, |
2654 | do process events (but don't run any timers). | |
2655 | This is so that X events will be processed. | |
0c9960e9 | 2656 | Otherwise they may have to wait until polling takes place. |
77e1b3d4 RS |
2657 | That would causes delays in pasting selections, for example. |
2658 | ||
2659 | (We used to do this only if wait_for_cell.) */ | |
2660 | if (XINT (read_kbd) == 0 && detect_input_pending ()) | |
f854a00b RS |
2661 | { |
2662 | swallow_events (do_display); | |
0c9960e9 | 2663 | #if 0 /* Exiting when read_kbd doesn't request that seems wrong, though. */ |
f854a00b RS |
2664 | if (detect_input_pending ()) |
2665 | break; | |
5d5beb62 | 2666 | #endif |
0c9960e9 | 2667 | } |
f854a00b | 2668 | |
84aa3ace RS |
2669 | /* Exit now if the cell we're waiting for became non-nil. */ |
2670 | if (wait_for_cell && ! NILP (*wait_for_cell)) | |
2671 | break; | |
2672 | ||
4746118a | 2673 | #ifdef SIGIO |
5d5beb62 | 2674 | /* If we think we have keyboard input waiting, but didn't get SIGIO, |
d0d6b7c5 JB |
2675 | go read it. This can happen with X on BSD after logging out. |
2676 | In that case, there really is no input and no SIGIO, | |
2677 | but select says there is input. */ | |
2678 | ||
dd2281ae | 2679 | if (XINT (read_kbd) && interrupt_input |
5d5beb62 | 2680 | && keyboard_bit_set (&Available)) |
e643c5be | 2681 | kill (getpid (), SIGIO); |
4746118a | 2682 | #endif |
d0d6b7c5 | 2683 | |
d0d6b7c5 JB |
2684 | if (! wait_proc) |
2685 | got_some_input |= nfds > 0; | |
2686 | ||
32676c08 JB |
2687 | /* If checking input just got us a size-change event from X, |
2688 | obey it now if we should. */ | |
97f3b3d6 | 2689 | if (XINT (read_kbd) || wait_for_cell) |
2b653806 | 2690 | do_pending_window_change (0); |
32676c08 | 2691 | |
a9f2c884 RS |
2692 | /* Check for data from a process. */ |
2693 | /* Really FIRST_PROC_DESC should be 0 on Unix, | |
2694 | but this is safer in the short run. */ | |
a69281ff | 2695 | for (channel = 0; channel <= max_process_desc; channel++) |
d0d6b7c5 | 2696 | { |
a69281ff RS |
2697 | if (FD_ISSET (channel, &Available) |
2698 | && FD_ISSET (channel, &non_keyboard_wait_mask)) | |
d0d6b7c5 JB |
2699 | { |
2700 | int nread; | |
2701 | ||
2702 | /* If waiting for this channel, arrange to return as | |
2703 | soon as no more input to be processed. No more | |
2704 | waiting. */ | |
2705 | if (wait_channel == channel) | |
2706 | { | |
a9f2c884 | 2707 | wait_channel = -1; |
d0d6b7c5 JB |
2708 | time_limit = -1; |
2709 | got_some_input = 1; | |
2710 | } | |
2711 | proc = chan_process[channel]; | |
2712 | if (NILP (proc)) | |
2713 | continue; | |
2714 | ||
d0d6b7c5 JB |
2715 | /* Read data from the process, starting with our |
2716 | buffered-ahead character if we have one. */ | |
2717 | ||
2718 | nread = read_process_output (proc, channel); | |
2719 | if (nread > 0) | |
2720 | { | |
2721 | /* Since read_process_output can run a filter, | |
2722 | which can call accept-process-output, | |
2723 | don't try to read from any other processes | |
2724 | before doing the select again. */ | |
2725 | FD_ZERO (&Available); | |
2726 | ||
2727 | if (do_display) | |
2728 | redisplay_preserve_echo_area (); | |
2729 | } | |
2730 | #ifdef EWOULDBLOCK | |
2731 | else if (nread == -1 && errno == EWOULDBLOCK) | |
2732 | ; | |
0b75e9a4 | 2733 | #endif |
89d7280d RS |
2734 | /* ISC 4.1 defines both EWOULDBLOCK and O_NONBLOCK, |
2735 | and Emacs uses O_NONBLOCK, so what we get is EAGAIN. */ | |
d0d6b7c5 JB |
2736 | #ifdef O_NONBLOCK |
2737 | else if (nread == -1 && errno == EAGAIN) | |
2738 | ; | |
2739 | #else | |
2740 | #ifdef O_NDELAY | |
2741 | else if (nread == -1 && errno == EAGAIN) | |
2742 | ; | |
2743 | /* Note that we cannot distinguish between no input | |
2744 | available now and a closed pipe. | |
2745 | With luck, a closed pipe will be accompanied by | |
2746 | subprocess termination and SIGCHLD. */ | |
2747 | else if (nread == 0 && !NETCONN_P (proc)) | |
2748 | ; | |
ffd56f97 JB |
2749 | #endif /* O_NDELAY */ |
2750 | #endif /* O_NONBLOCK */ | |
d0d6b7c5 JB |
2751 | #ifdef HAVE_PTYS |
2752 | /* On some OSs with ptys, when the process on one end of | |
2753 | a pty exits, the other end gets an error reading with | |
2754 | errno = EIO instead of getting an EOF (0 bytes read). | |
2755 | Therefore, if we get an error reading and errno = | |
2756 | EIO, just continue, because the child process has | |
2757 | exited and should clean itself up soon (e.g. when we | |
5651af6d RS |
2758 | get a SIGCHLD). |
2759 | ||
2760 | However, it has been known to happen that the SIGCHLD | |
2761 | got lost. So raise the signl again just in case. | |
2762 | It can't hurt. */ | |
d0d6b7c5 | 2763 | else if (nread == -1 && errno == EIO) |
5651af6d | 2764 | kill (getpid (), SIGCHLD); |
ffd56f97 JB |
2765 | #endif /* HAVE_PTYS */ |
2766 | /* If we can detect process termination, don't consider the process | |
2767 | gone just because its pipe is closed. */ | |
d0d6b7c5 JB |
2768 | #ifdef SIGCHLD |
2769 | else if (nread == 0 && !NETCONN_P (proc)) | |
2770 | ; | |
2771 | #endif | |
2772 | else | |
2773 | { | |
2774 | /* Preserve status of processes already terminated. */ | |
2775 | XSETINT (XPROCESS (proc)->tick, ++process_tick); | |
2776 | deactivate_process (proc); | |
2777 | if (!NILP (XPROCESS (proc)->raw_status_low)) | |
2778 | update_status (XPROCESS (proc)); | |
2779 | if (EQ (XPROCESS (proc)->status, Qrun)) | |
2780 | XPROCESS (proc)->status | |
2781 | = Fcons (Qexit, Fcons (make_number (256), Qnil)); | |
2782 | } | |
2783 | } | |
ffd56f97 JB |
2784 | } /* end for each file descriptor */ |
2785 | } /* end while exit conditions not met */ | |
d0d6b7c5 | 2786 | |
d430ee71 RS |
2787 | waiting_for_user_input_p = 0; |
2788 | ||
ffd56f97 JB |
2789 | /* If calling from keyboard input, do not quit |
2790 | since we want to return C-g as an input character. | |
2791 | Otherwise, do pending quit if requested. */ | |
f76475ad | 2792 | if (XINT (read_kbd) >= 0) |
ffd56f97 JB |
2793 | { |
2794 | /* Prevent input_pending from remaining set if we quit. */ | |
2795 | clear_input_pending (); | |
2796 | QUIT; | |
2797 | } | |
e07d5449 KH |
2798 | #ifdef hpux |
2799 | /* AlainF 5-Jul-1996 | |
2800 | HP-UX 10.10 seems to have problems with signals coming in | |
2801 | Causes "poll: interrupted system call" messages when Emacs is run | |
2802 | in an X window | |
2803 | Turn periodic alarms back on */ | |
5d5beb62 | 2804 | start_polling (); |
e07d5449 | 2805 | #endif |
efa2a55c | 2806 | |
d0d6b7c5 JB |
2807 | return got_some_input; |
2808 | } | |
2809 | \f | |
3b9a3dfa RS |
2810 | /* Given a list (FUNCTION ARGS...), apply FUNCTION to the ARGS. */ |
2811 | ||
2812 | static Lisp_Object | |
2813 | read_process_output_call (fun_and_args) | |
2814 | Lisp_Object fun_and_args; | |
2815 | { | |
70949dac | 2816 | return apply1 (XCAR (fun_and_args), XCDR (fun_and_args)); |
3b9a3dfa RS |
2817 | } |
2818 | ||
2819 | static Lisp_Object | |
2820 | read_process_output_error_handler (error) | |
2821 | Lisp_Object error; | |
2822 | { | |
2823 | cmd_error_internal (error, "error in process filter: "); | |
2824 | Vinhibit_quit = Qt; | |
2825 | update_echo_area (); | |
833ba342 | 2826 | Fsleep_for (make_number (2), Qnil); |
8c983bf2 | 2827 | return Qt; |
3b9a3dfa RS |
2828 | } |
2829 | ||
d0d6b7c5 JB |
2830 | /* Read pending output from the process channel, |
2831 | starting with our buffered-ahead character if we have one. | |
0fa1789e | 2832 | Yield number of decoded characters read. |
d0d6b7c5 JB |
2833 | |
2834 | This function reads at most 1024 characters. | |
2835 | If you want to read all available subprocess output, | |
0fa1789e KH |
2836 | you must call it repeatedly until it returns zero. |
2837 | ||
2838 | The characters read are decoded according to PROC's coding-system | |
2839 | for decoding. */ | |
d0d6b7c5 | 2840 | |
dfcf069d | 2841 | int |
d0d6b7c5 JB |
2842 | read_process_output (proc, channel) |
2843 | Lisp_Object proc; | |
2844 | register int channel; | |
2845 | { | |
1d2fc612 | 2846 | register int nchars, nbytes; |
d0d6b7c5 | 2847 | char *chars; |
0fa1789e KH |
2848 | #ifdef VMS |
2849 | int chars_allocated = 0; /* If 1, `chars' should be freed later. */ | |
d0d6b7c5 | 2850 | #else |
0fa1789e | 2851 | char buf[1024]; |
d0d6b7c5 JB |
2852 | #endif |
2853 | register Lisp_Object outstream; | |
2854 | register struct buffer *old = current_buffer; | |
2855 | register struct Lisp_Process *p = XPROCESS (proc); | |
2856 | register int opoint; | |
c7580538 | 2857 | struct coding_system *coding = proc_decode_coding_system[channel]; |
0fa1789e KH |
2858 | int chars_in_decoding_buf = 0; /* If 1, `chars' points |
2859 | XSTRING (p->decoding_buf)->data. */ | |
e7fbaa65 | 2860 | int carryover = XINT (p->decoding_carryover); |
d0d6b7c5 JB |
2861 | |
2862 | #ifdef VMS | |
2863 | VMS_PROC_STUFF *vs, *get_vms_process_pointer(); | |
2864 | ||
2865 | vs = get_vms_process_pointer (p->pid); | |
2866 | if (vs) | |
2867 | { | |
2868 | if (!vs->iosb[0]) | |
a319f7c1 | 2869 | return (0); /* Really weird if it does this */ |
d0d6b7c5 JB |
2870 | if (!(vs->iosb[0] & 1)) |
2871 | return -1; /* I/O error */ | |
2872 | } | |
2873 | else | |
2874 | error ("Could not get VMS process pointer"); | |
2875 | chars = vs->inputBuffer; | |
1d2fc612 RS |
2876 | nbytes = clean_vms_buffer (chars, vs->iosb[1]); |
2877 | if (nbytes <= 0) | |
d0d6b7c5 JB |
2878 | { |
2879 | start_vms_process_read (vs); /* Crank up the next read on the process */ | |
2880 | return 1; /* Nothing worth printing, say we got 1 */ | |
2881 | } | |
e7fbaa65 | 2882 | if (carryover > 0) |
0fa1789e | 2883 | { |
e7fbaa65 KH |
2884 | /* The data carried over in the previous decoding (which are at |
2885 | the tail of decoding buffer) should be prepended to the new | |
2886 | data read to decode all together. */ | |
2887 | char *buf = (char *) xmalloc (nbytes + carryover); | |
2888 | ||
2889 | bcopy (XSTRING (p->decoding_buf)->data | |
fc932ac6 | 2890 | + STRING_BYTES (XSTRING (p->decoding_buf)) - carryover, |
e7fbaa65 KH |
2891 | buf, carryover); |
2892 | bcopy (chars, buf + carryover, nbytes); | |
0fa1789e KH |
2893 | chars = buf; |
2894 | chars_allocated = 1; | |
2895 | } | |
d0d6b7c5 JB |
2896 | #else /* not VMS */ |
2897 | ||
e7fbaa65 KH |
2898 | if (carryover) |
2899 | /* See the comment above. */ | |
2900 | bcopy (XSTRING (p->decoding_buf)->data | |
fc932ac6 | 2901 | + STRING_BYTES (XSTRING (p->decoding_buf)) - carryover, |
e7fbaa65 | 2902 | buf, carryover); |
0fa1789e | 2903 | |
d0d6b7c5 | 2904 | if (proc_buffered_char[channel] < 0) |
68c45bf0 | 2905 | nbytes = emacs_read (channel, buf + carryover, (sizeof buf) - carryover); |
d0d6b7c5 JB |
2906 | else |
2907 | { | |
e7fbaa65 | 2908 | buf[carryover] = proc_buffered_char[channel]; |
d0d6b7c5 | 2909 | proc_buffered_char[channel] = -1; |
68c45bf0 PE |
2910 | nbytes = emacs_read (channel, buf + carryover + 1, |
2911 | (sizeof buf) - carryover - 1); | |
1d2fc612 RS |
2912 | if (nbytes < 0) |
2913 | nbytes = 1; | |
d0d6b7c5 | 2914 | else |
1d2fc612 | 2915 | nbytes = nbytes + 1; |
d0d6b7c5 | 2916 | } |
0fa1789e | 2917 | chars = buf; |
d0d6b7c5 JB |
2918 | #endif /* not VMS */ |
2919 | ||
ca65341e KH |
2920 | XSETINT (p->decoding_carryover, 0); |
2921 | ||
1d2fc612 | 2922 | /* At this point, NBYTES holds number of characters just received |
0fa1789e | 2923 | (including the one in proc_buffered_char[channel]). */ |
de7fbd09 KH |
2924 | if (nbytes <= 0) |
2925 | { | |
2926 | if (nbytes < 0 || coding->mode & CODING_MODE_LAST_BLOCK) | |
2927 | return nbytes; | |
2928 | coding->mode |= CODING_MODE_LAST_BLOCK; | |
2929 | } | |
d0d6b7c5 | 2930 | |
1d2fc612 | 2931 | /* Now set NBYTES how many bytes we must decode. */ |
e7fbaa65 KH |
2932 | nbytes += carryover; |
2933 | nchars = nbytes; | |
0fa1789e | 2934 | |
e7fbaa65 | 2935 | if (CODING_MAY_REQUIRE_DECODING (coding)) |
0fa1789e | 2936 | { |
1d2fc612 | 2937 | int require = decoding_buffer_size (coding, nbytes); |
e7fbaa65 | 2938 | int result; |
0fa1789e | 2939 | |
fc932ac6 | 2940 | if (STRING_BYTES (XSTRING (p->decoding_buf)) < require) |
0fa1789e | 2941 | p->decoding_buf = make_uninit_string (require); |
e7fbaa65 | 2942 | result = decode_coding (coding, chars, XSTRING (p->decoding_buf)->data, |
fc932ac6 | 2943 | nbytes, STRING_BYTES (XSTRING (p->decoding_buf))); |
e7fbaa65 | 2944 | carryover = nbytes - coding->consumed; |
ca65341e KH |
2945 | if (carryover > 0) |
2946 | { | |
55fd5048 KH |
2947 | /* Copy the carryover bytes to the end of p->decoding_buf, to |
2948 | be processed on the next read. Since decoding_buffer_size | |
2949 | asks for an extra amount of space beyond the maximum | |
2950 | expected for the output, there should always be sufficient | |
2951 | space for the carryover (which is by definition a sequence | |
2952 | of bytes that was not long enough to be decoded, and thus | |
2953 | has a bounded length). */ | |
2954 | if (STRING_BYTES (XSTRING (p->decoding_buf)) | |
2955 | < coding->produced + carryover) | |
2956 | abort (); | |
2957 | bcopy (chars + coding->consumed, | |
2958 | XSTRING (p->decoding_buf)->data | |
2959 | + STRING_BYTES (XSTRING (p->decoding_buf)) - carryover, | |
ca65341e KH |
2960 | carryover); |
2961 | XSETINT (p->decoding_carryover, carryover); | |
2962 | } | |
0fa1789e | 2963 | |
e7fbaa65 | 2964 | /* A new coding system might be found by `decode_coding'. */ |
0fa1789e KH |
2965 | if (!EQ (p->decode_coding_system, coding->symbol)) |
2966 | { | |
2967 | p->decode_coding_system = coding->symbol; | |
77e1b3d4 RS |
2968 | |
2969 | /* Don't call setup_coding_system for | |
2970 | proc_decode_coding_system[channel] here. It is done in | |
2971 | detect_coding called via decode_coding above. */ | |
2972 | ||
e7fbaa65 | 2973 | /* If a coding system for encoding is not yet decided, we set |
486b111b KH |
2974 | it as the same as coding-system for decoding. |
2975 | ||
2976 | But, before doing that we must check if | |
2977 | proc_encode_coding_system[p->outfd] surely points to a | |
2978 | valid memory because p->outfd will be changed once EOF is | |
2979 | sent to the process. */ | |
2980 | if (NILP (p->encode_coding_system) | |
e6d6dff2 | 2981 | && proc_encode_coding_system[XINT (p->outfd)]) |
0fa1789e KH |
2982 | { |
2983 | p->encode_coding_system = coding->symbol; | |
2984 | setup_coding_system (coding->symbol, | |
e6d6dff2 | 2985 | proc_encode_coding_system[XINT (p->outfd)]); |
0fa1789e KH |
2986 | } |
2987 | } | |
1d2fc612 | 2988 | |
0fa1789e KH |
2989 | #ifdef VMS |
2990 | /* Now we don't need the contents of `chars'. */ | |
2991 | if (chars_allocated) | |
2992 | free (chars); | |
2993 | #endif | |
e7fbaa65 | 2994 | if (coding->produced == 0) |
0fa1789e | 2995 | return 0; |
d7223684 | 2996 | chars = (char *) XSTRING (p->decoding_buf)->data; |
e7fbaa65 | 2997 | nbytes = coding->produced; |
0d023da1 KH |
2998 | nchars = (coding->fake_multibyte |
2999 | ? multibyte_chars_in_text (chars, nbytes) | |
3000 | : coding->produced_char); | |
0fa1789e KH |
3001 | chars_in_decoding_buf = 1; |
3002 | } | |
8bc49fd1 | 3003 | else |
0fa1789e | 3004 | { |
8bc49fd1 KH |
3005 | #ifdef VMS |
3006 | if (chars_allocated) | |
3007 | { | |
3008 | /* Although we don't have to decode the received data, we | |
3009 | must move it to an area which we don't have to free. */ | |
3010 | if (! STRINGP (p->decoding_buf) | |
3011 | || STRING_BYTES (XSTRING (p->decoding_buf)) < nbytes) | |
3012 | p->decoding_buf = make_uninit_string (nbytes); | |
3013 | bcopy (chars, XSTRING (p->decoding_buf)->data, nbytes); | |
3014 | free (chars); | |
3015 | chars = XSTRING (p->decoding_buf)->data; | |
3016 | chars_in_decoding_buf = 1; | |
3017 | } | |
3018 | #endif | |
0d023da1 | 3019 | nchars = multibyte_chars_in_text (chars, nbytes); |
0fa1789e | 3020 | } |
0fa1789e | 3021 | |
486b111b KH |
3022 | Vlast_coding_system_used = coding->symbol; |
3023 | ||
52a1b894 EZ |
3024 | /* If the caller required, let the process associated buffer |
3025 | inherit the coding-system used to decode the process output. */ | |
aa91317a | 3026 | if (! NILP (p->inherit_coding_system_flag) |
52a1b894 EZ |
3027 | && !NILP (p->buffer) && !NILP (XBUFFER (p->buffer)->name)) |
3028 | { | |
3029 | struct buffer *prev_buf = current_buffer; | |
3030 | ||
3031 | Fset_buffer (p->buffer); | |
3032 | call1 (intern ("after-insert-file-set-buffer-file-coding-system"), | |
3033 | make_number (nbytes)); | |
3034 | set_buffer_internal (prev_buf); | |
3035 | } | |
3036 | ||
1d2fc612 | 3037 | /* Read and dispose of the process output. */ |
d0d6b7c5 JB |
3038 | outstream = p->filter; |
3039 | if (!NILP (outstream)) | |
3040 | { | |
3041 | /* We inhibit quit here instead of just catching it so that | |
3042 | hitting ^G when a filter happens to be running won't screw | |
3043 | it up. */ | |
3044 | int count = specpdl_ptr - specpdl; | |
30c78175 | 3045 | Lisp_Object odeactivate; |
dfc21838 | 3046 | Lisp_Object obuffer, okeymap; |
1d2fc612 | 3047 | Lisp_Object text; |
4da2f5be | 3048 | int outer_running_asynch_code = running_asynch_code; |
bbce7d72 | 3049 | int waiting = waiting_for_user_input_p; |
30c78175 | 3050 | |
dfc21838 RS |
3051 | /* No need to gcpro these, because all we do with them later |
3052 | is test them for EQness, and none of them should be a string. */ | |
30c78175 | 3053 | odeactivate = Vdeactivate_mark; |
dfc21838 RS |
3054 | XSETBUFFER (obuffer, current_buffer); |
3055 | okeymap = current_buffer->keymap; | |
30c78175 | 3056 | |
d0d6b7c5 | 3057 | specbind (Qinhibit_quit, Qt); |
6545aada | 3058 | specbind (Qlast_nonmenu_event, Qt); |
3b9a3dfa | 3059 | |
4da2f5be RS |
3060 | /* In case we get recursively called, |
3061 | and we already saved the match data nonrecursively, | |
3062 | save the same match data in safely recursive fashion. */ | |
3063 | if (outer_running_asynch_code) | |
3064 | { | |
3065 | Lisp_Object tem; | |
3066 | /* Don't clobber the CURRENT match data, either! */ | |
dd130227 | 3067 | tem = Fmatch_data (Qnil, Qnil); |
4da2f5be | 3068 | restore_match_data (); |
8f1ecd05 RS |
3069 | record_unwind_protect (Fset_match_data, Fmatch_data (Qnil, Qnil)); |
3070 | Fset_match_data (tem); | |
4da2f5be RS |
3071 | } |
3072 | ||
3073 | /* For speed, if a search happens within this code, | |
3074 | save the match data in a special nonrecursive fashion. */ | |
7074fde6 | 3075 | running_asynch_code = 1; |
4da2f5be | 3076 | |
51c6067d KH |
3077 | /* The multibyteness of a string given to the filter is decided |
3078 | by which coding system we used for decoding. */ | |
3079 | if (coding->type == coding_type_no_conversion | |
3080 | || coding->type == coding_type_raw_text) | |
3081 | text = make_unibyte_string (chars, nbytes); | |
3082 | else | |
3083 | text = make_multibyte_string (chars, nchars, nbytes); | |
3084 | ||
3b9a3dfa RS |
3085 | internal_condition_case_1 (read_process_output_call, |
3086 | Fcons (outstream, | |
1d2fc612 | 3087 | Fcons (proc, Fcons (text, Qnil))), |
3b9a3dfa RS |
3088 | !NILP (Vdebug_on_error) ? Qnil : Qerror, |
3089 | read_process_output_error_handler); | |
4da2f5be RS |
3090 | |
3091 | /* If we saved the match data nonrecursively, restore it now. */ | |
7074fde6 | 3092 | restore_match_data (); |
4da2f5be | 3093 | running_asynch_code = outer_running_asynch_code; |
d0d6b7c5 | 3094 | |
592ce97f | 3095 | /* Handling the process output should not deactivate the mark. */ |
30c78175 RS |
3096 | Vdeactivate_mark = odeactivate; |
3097 | ||
bbce7d72 RS |
3098 | /* Restore waiting_for_user_input_p as it was |
3099 | when we were called, in case the filter clobbered it. */ | |
3100 | waiting_for_user_input_p = waiting; | |
3101 | ||
7973cfa8 RS |
3102 | #if 0 /* Call record_asynch_buffer_change unconditionally, |
3103 | because we might have changed minor modes or other things | |
3104 | that affect key bindings. */ | |
dfc21838 RS |
3105 | if (! EQ (Fcurrent_buffer (), obuffer) |
3106 | || ! EQ (current_buffer->keymap, okeymap)) | |
7973cfa8 | 3107 | #endif |
927e08be RS |
3108 | /* But do it only if the caller is actually going to read events. |
3109 | Otherwise there's no need to make him wake up, and it could | |
3110 | cause trouble (for example it would make Fsit_for return). */ | |
3111 | if (waiting_for_user_input_p == -1) | |
3112 | record_asynch_buffer_change (); | |
d72534ba | 3113 | |
d0d6b7c5 JB |
3114 | #ifdef VMS |
3115 | start_vms_process_read (vs); | |
3116 | #endif | |
2ea6d561 | 3117 | unbind_to (count, Qnil); |
d0d6b7c5 JB |
3118 | return nchars; |
3119 | } | |
3120 | ||
3121 | /* If no filter, write into buffer if it isn't dead. */ | |
3122 | if (!NILP (p->buffer) && !NILP (XBUFFER (p->buffer)->name)) | |
3123 | { | |
b0310da4 | 3124 | Lisp_Object old_read_only; |
12ca5cdf | 3125 | int old_begv, old_zv; |
d8a2934e | 3126 | int old_begv_byte, old_zv_byte; |
30c78175 | 3127 | Lisp_Object odeactivate; |
d8a2934e RS |
3128 | int before, before_byte; |
3129 | int opoint_byte; | |
30c78175 RS |
3130 | |
3131 | odeactivate = Vdeactivate_mark; | |
d0d6b7c5 JB |
3132 | |
3133 | Fset_buffer (p->buffer); | |
6ec8bbd2 | 3134 | opoint = PT; |
d8a2934e | 3135 | opoint_byte = PT_BYTE; |
b0310da4 | 3136 | old_read_only = current_buffer->read_only; |
12ca5cdf RS |
3137 | old_begv = BEGV; |
3138 | old_zv = ZV; | |
d8a2934e RS |
3139 | old_begv_byte = BEGV_BYTE; |
3140 | old_zv_byte = ZV_BYTE; | |
b0310da4 JB |
3141 | |
3142 | current_buffer->read_only = Qnil; | |
d0d6b7c5 JB |
3143 | |
3144 | /* Insert new output into buffer | |
3145 | at the current end-of-output marker, | |
3146 | thus preserving logical ordering of input and output. */ | |
3147 | if (XMARKER (p->mark)->buffer) | |
d8a2934e RS |
3148 | SET_PT_BOTH (clip_to_bounds (BEGV, marker_position (p->mark), ZV), |
3149 | clip_to_bounds (BEGV_BYTE, marker_byte_position (p->mark), | |
3150 | ZV_BYTE)); | |
d0d6b7c5 | 3151 | else |
d8a2934e | 3152 | SET_PT_BOTH (ZV, ZV_BYTE); |
12ca5cdf | 3153 | before = PT; |
d8a2934e | 3154 | before_byte = PT_BYTE; |
b0310da4 JB |
3155 | |
3156 | /* If the output marker is outside of the visible region, save | |
3157 | the restriction and widen. */ | |
6ec8bbd2 | 3158 | if (! (BEGV <= PT && PT <= ZV)) |
b0310da4 JB |
3159 | Fwiden (); |
3160 | ||
8bc49fd1 KH |
3161 | if (NILP (current_buffer->enable_multibyte_characters)) |
3162 | nchars = nbytes; | |
3163 | ||
d0d6b7c5 JB |
3164 | /* Insert before markers in case we are inserting where |
3165 | the buffer's mark is, and the user's next command is Meta-y. */ | |
0fa1789e | 3166 | if (chars_in_decoding_buf) |
0d023da1 KH |
3167 | { |
3168 | /* Since multibyteness of p->docoding_buf is corrupted, we | |
3169 | can't use insert_from_string_before_markers. */ | |
3170 | char *temp_buf; | |
3171 | ||
3172 | temp_buf = (char *) alloca (nbytes); | |
3173 | bcopy (XSTRING (p->decoding_buf)->data, temp_buf, nbytes); | |
3174 | insert_before_markers (temp_buf, nbytes); | |
3175 | } | |
0fa1789e | 3176 | else |
1741e72d RS |
3177 | { |
3178 | insert_1_both (chars, nchars, nbytes, 0, 1, 1); | |
1c89844b | 3179 | signal_after_change (before, 0, PT - before); |
f9b537ec | 3180 | update_compositions (before, PT, CHECK_BORDER); |
1741e72d | 3181 | } |
d8a2934e | 3182 | set_marker_both (p->mark, p->buffer, PT, PT_BYTE); |
b0310da4 | 3183 | |
d0d6b7c5 JB |
3184 | update_mode_lines++; |
3185 | ||
12ca5cdf RS |
3186 | /* Make sure opoint and the old restrictions |
3187 | float ahead of any new text just as point would. */ | |
3188 | if (opoint >= before) | |
d8a2934e RS |
3189 | { |
3190 | opoint += PT - before; | |
3191 | opoint_byte += PT_BYTE - before_byte; | |
3192 | } | |
12ca5cdf | 3193 | if (old_begv > before) |
d8a2934e RS |
3194 | { |
3195 | old_begv += PT - before; | |
3196 | old_begv_byte += PT_BYTE - before_byte; | |
3197 | } | |
12ca5cdf | 3198 | if (old_zv >= before) |
d8a2934e RS |
3199 | { |
3200 | old_zv += PT - before; | |
3201 | old_zv_byte += PT_BYTE - before_byte; | |
3202 | } | |
12ca5cdf | 3203 | |
b0310da4 | 3204 | /* If the restriction isn't what it should be, set it. */ |
12ca5cdf RS |
3205 | if (old_begv != BEGV || old_zv != ZV) |
3206 | Fnarrow_to_region (make_number (old_begv), make_number (old_zv)); | |
b0310da4 | 3207 | |
592ce97f | 3208 | /* Handling the process output should not deactivate the mark. */ |
30c78175 RS |
3209 | Vdeactivate_mark = odeactivate; |
3210 | ||
b0310da4 | 3211 | current_buffer->read_only = old_read_only; |
d8a2934e | 3212 | SET_PT_BOTH (opoint, opoint_byte); |
d0d6b7c5 JB |
3213 | set_buffer_internal (old); |
3214 | } | |
3215 | #ifdef VMS | |
3216 | start_vms_process_read (vs); | |
3217 | #endif | |
1d2fc612 | 3218 | return nbytes; |
d0d6b7c5 JB |
3219 | } |
3220 | ||
3221 | DEFUN ("waiting-for-user-input-p", Fwaiting_for_user_input_p, Swaiting_for_user_input_p, | |
3222 | 0, 0, 0, | |
8b4d685f | 3223 | "Returns non-nil if emacs is waiting for input from the user.\n\ |
d0d6b7c5 JB |
3224 | This is intended for use by asynchronous process output filters and sentinels.") |
3225 | () | |
3226 | { | |
8b4d685f | 3227 | return (waiting_for_user_input_p ? Qt : Qnil); |
d0d6b7c5 JB |
3228 | } |
3229 | \f | |
3230 | /* Sending data to subprocess */ | |
3231 | ||
3232 | jmp_buf send_process_frame; | |
3233 | ||
3234 | SIGTYPE | |
3235 | send_process_trap () | |
3236 | { | |
3237 | #ifdef BSD4_1 | |
3238 | sigrelse (SIGPIPE); | |
3239 | sigrelse (SIGALRM); | |
3240 | #endif /* BSD4_1 */ | |
3241 | longjmp (send_process_frame, 1); | |
3242 | } | |
3243 | ||
4556b700 RS |
3244 | /* Send some data to process PROC. |
3245 | BUF is the beginning of the data; LEN is the number of characters. | |
0fa1789e KH |
3246 | OBJECT is the Lisp object that the data comes from. |
3247 | ||
3248 | The data is encoded by PROC's coding-system for encoding before it | |
3249 | is sent. But if the data ends at the middle of multi-byte | |
3250 | representation, that incomplete sequence of bytes are sent without | |
3251 | being encoded. Should we store them in a buffer to prepend them to | |
3252 | the data send later? */ | |
4556b700 | 3253 | |
dfcf069d | 3254 | void |
4556b700 | 3255 | send_process (proc, buf, len, object) |
ecd1f654 | 3256 | volatile Lisp_Object proc; |
b684d043 | 3257 | unsigned char *buf; |
d0d6b7c5 | 3258 | int len; |
4556b700 | 3259 | Lisp_Object object; |
d0d6b7c5 | 3260 | { |
ecd1f654 | 3261 | /* Use volatile to protect variables from being clobbered by longjmp. */ |
d0d6b7c5 | 3262 | int rv; |
ecd1f654 | 3263 | volatile unsigned char *procname = XSTRING (XPROCESS (proc)->name)->data; |
0fa1789e | 3264 | struct coding_system *coding; |
6044e593 | 3265 | struct gcpro gcpro1; |
e7fbaa65 | 3266 | int carryover = XINT (XPROCESS (proc)->encoding_carryover); |
6044e593 RS |
3267 | |
3268 | GCPRO1 (object); | |
d0d6b7c5 | 3269 | |
d0d6b7c5 JB |
3270 | #ifdef VMS |
3271 | struct Lisp_Process *p = XPROCESS (proc); | |
3272 | VMS_PROC_STUFF *vs, *get_vms_process_pointer(); | |
3273 | #endif /* VMS */ | |
3274 | ||
3275 | if (! NILP (XPROCESS (proc)->raw_status_low)) | |
3276 | update_status (XPROCESS (proc)); | |
3277 | if (! EQ (XPROCESS (proc)->status, Qrun)) | |
3278 | error ("Process %s not running", procname); | |
0fa1789e KH |
3279 | if (XINT (XPROCESS (proc)->outfd) < 0) |
3280 | error ("Output file descriptor of %s is closed", procname); | |
3281 | ||
c7580538 | 3282 | coding = proc_encode_coding_system[XINT (XPROCESS (proc)->outfd)]; |
486b111b KH |
3283 | Vlast_coding_system_used = coding->symbol; |
3284 | ||
1a283a4c | 3285 | if (CODING_REQUIRE_ENCODING (coding)) |
0fa1789e KH |
3286 | { |
3287 | int require = encoding_buffer_size (coding, len); | |
41d03b9a | 3288 | int offset; |
b684d043 | 3289 | unsigned char *temp_buf = NULL; |
0fa1789e KH |
3290 | |
3291 | /* Remember the offset of data because a string or a buffer may | |
3292 | be relocated. Setting OFFSET to -1 means we don't have to | |
9660863d | 3293 | care about relocation. */ |
0fa1789e | 3294 | offset = (BUFFERP (object) |
d8a2934e | 3295 | ? BUF_PTR_BYTE_POS (XBUFFER (object), buf) |
0fa1789e | 3296 | : (STRINGP (object) |
9660863d | 3297 | ? buf - XSTRING (object)->data |
0fa1789e KH |
3298 | : -1)); |
3299 | ||
e7fbaa65 | 3300 | if (carryover > 0) |
0fa1789e | 3301 | { |
e7fbaa65 | 3302 | temp_buf = (unsigned char *) xmalloc (len + carryover); |
0fa1789e KH |
3303 | |
3304 | if (offset >= 0) | |
3305 | { | |
3306 | if (BUFFERP (object)) | |
d8a2934e | 3307 | buf = BUF_BYTE_ADDRESS (XBUFFER (object), offset); |
0fa1789e | 3308 | else if (STRINGP (object)) |
b684d043 | 3309 | buf = offset + XSTRING (object)->data; |
9660863d | 3310 | /* Now we don't have to care about relocation. */ |
0fa1789e KH |
3311 | offset = -1; |
3312 | } | |
e7fbaa65 | 3313 | bcopy ((XSTRING (XPROCESS (proc)->encoding_buf)->data |
fc932ac6 | 3314 | + STRING_BYTES (XSTRING (XPROCESS (proc)->encoding_buf)) |
e7fbaa65 KH |
3315 | - carryover), |
3316 | temp_buf, | |
3317 | carryover); | |
3318 | bcopy (buf, temp_buf + carryover, len); | |
0fa1789e KH |
3319 | buf = temp_buf; |
3320 | } | |
3321 | ||
fc932ac6 | 3322 | if (STRING_BYTES (XSTRING (XPROCESS (proc)->encoding_buf)) < require) |
0fa1789e KH |
3323 | { |
3324 | XPROCESS (proc)->encoding_buf = make_uninit_string (require); | |
3325 | ||
3326 | if (offset >= 0) | |
3327 | { | |
3328 | if (BUFFERP (object)) | |
d8a2934e | 3329 | buf = BUF_BYTE_ADDRESS (XBUFFER (object), offset); |
0fa1789e | 3330 | else if (STRINGP (object)) |
b684d043 | 3331 | buf = offset + XSTRING (object)->data; |
0fa1789e KH |
3332 | } |
3333 | } | |
3334 | object = XPROCESS (proc)->encoding_buf; | |
e7fbaa65 | 3335 | encode_coding (coding, buf, XSTRING (object)->data, |
fc932ac6 | 3336 | len, STRING_BYTES (XSTRING (object))); |
e7fbaa65 | 3337 | len = coding->produced; |
0fa1789e KH |
3338 | buf = XSTRING (object)->data; |
3339 | if (temp_buf) | |
3340 | xfree (temp_buf); | |
3341 | } | |
d0d6b7c5 JB |
3342 | |
3343 | #ifdef VMS | |
3344 | vs = get_vms_process_pointer (p->pid); | |
3345 | if (vs == 0) | |
3346 | error ("Could not find this process: %x", p->pid); | |
3347 | else if (write_to_vms_process (vs, buf, len)) | |
3348 | ; | |
3349 | #else | |
4556b700 RS |
3350 | |
3351 | if (pty_max_bytes == 0) | |
3352 | { | |
3353 | #if defined (HAVE_FPATHCONF) && defined (_PC_MAX_CANON) | |
3354 | pty_max_bytes = fpathconf (XFASTINT (XPROCESS (proc)->outfd), | |
3355 | _PC_MAX_CANON); | |
3356 | if (pty_max_bytes < 0) | |
3357 | pty_max_bytes = 250; | |
3358 | #else | |
3359 | pty_max_bytes = 250; | |
3360 | #endif | |
3361 | /* Deduct one, to leave space for the eof. */ | |
3362 | pty_max_bytes--; | |
3363 | } | |
3364 | ||
d0d6b7c5 JB |
3365 | if (!setjmp (send_process_frame)) |
3366 | while (len > 0) | |
3367 | { | |
3368 | int this = len; | |
4746118a | 3369 | SIGTYPE (*old_sigpipe)(); |
93b4f699 | 3370 | |
4556b700 RS |
3371 | /* Decide how much data we can send in one batch. |
3372 | Long lines need to be split into multiple batches. */ | |
3373 | if (!NILP (XPROCESS (proc)->pty_flag)) | |
93b4f699 | 3374 | { |
4556b700 RS |
3375 | /* Starting this at zero is always correct when not the first iteration |
3376 | because the previous iteration ended by sending C-d. | |
3377 | It may not be correct for the first iteration | |
3378 | if a partial line was sent in a separate send_process call. | |
3379 | If that proves worth handling, we need to save linepos | |
3380 | in the process object. */ | |
3381 | int linepos = 0; | |
b684d043 RS |
3382 | unsigned char *ptr = buf; |
3383 | unsigned char *end = buf + len; | |
4556b700 RS |
3384 | |
3385 | /* Scan through this text for a line that is too long. */ | |
3386 | while (ptr != end && linepos < pty_max_bytes) | |
3387 | { | |
3388 | if (*ptr == '\n') | |
3389 | linepos = 0; | |
3390 | else | |
3391 | linepos++; | |
3392 | ptr++; | |
3393 | } | |
3394 | /* If we found one, break the line there | |
3395 | and put in a C-d to force the buffer through. */ | |
3396 | this = ptr - buf; | |
93b4f699 RS |
3397 | } |
3398 | ||
4556b700 RS |
3399 | /* Send this batch, using one or more write calls. */ |
3400 | while (this > 0) | |
d0d6b7c5 | 3401 | { |
4556b700 | 3402 | old_sigpipe = (SIGTYPE (*) ()) signal (SIGPIPE, send_process_trap); |
68c45bf0 | 3403 | rv = emacs_write (XINT (XPROCESS (proc)->outfd), buf, this); |
4556b700 RS |
3404 | signal (SIGPIPE, old_sigpipe); |
3405 | ||
3406 | if (rv < 0) | |
3407 | { | |
3408 | if (0 | |
d0d6b7c5 | 3409 | #ifdef EWOULDBLOCK |
4556b700 | 3410 | || errno == EWOULDBLOCK |
d0d6b7c5 JB |
3411 | #endif |
3412 | #ifdef EAGAIN | |
4556b700 | 3413 | || errno == EAGAIN |
d0d6b7c5 | 3414 | #endif |
4556b700 RS |
3415 | ) |
3416 | /* Buffer is full. Wait, accepting input; | |
3417 | that may allow the program | |
3418 | to finish doing output and read more. */ | |
3419 | { | |
3420 | Lisp_Object zero; | |
3421 | int offset; | |
3422 | ||
3433b6bd GM |
3423 | #ifdef BROKEN_PTY_READ_AFTER_EAGAIN |
3424 | /* A gross hack to work around a bug in FreeBSD. | |
3425 | In the following sequence, read(2) returns | |
3426 | bogus data: | |
3427 | ||
3428 | write(2) 1022 bytes | |
3429 | write(2) 954 bytes, get EAGAIN | |
3430 | read(2) 1024 bytes in process_read_output | |
3431 | read(2) 11 bytes in process_read_output | |
3432 | ||
3433 | That is, read(2) returns more bytes than have | |
3434 | ever been written successfully. The 1033 bytes | |
3435 | read are the 1022 bytes written successfully | |
3436 | after processing (for example with CRs added if | |
3437 | the terminal is set up that way which it is | |
3438 | here). The same bytes will be seen again in a | |
3439 | later read(2), without the CRs. */ | |
3440 | ||
3441 | if (errno == EAGAIN) | |
3442 | { | |
3443 | int flags = FWRITE; | |
3444 | ioctl (XINT (XPROCESS (proc)->outfd), TIOCFLUSH, | |
3445 | &flags); | |
3446 | } | |
3447 | #endif /* BROKEN_PTY_READ_AFTER_EAGAIN */ | |
3448 | ||
4556b700 RS |
3449 | /* Running filters might relocate buffers or strings. |
3450 | Arrange to relocate BUF. */ | |
3451 | if (BUFFERP (object)) | |
d8a2934e | 3452 | offset = BUF_PTR_BYTE_POS (XBUFFER (object), buf); |
4556b700 | 3453 | else if (STRINGP (object)) |
b684d043 | 3454 | offset = buf - XSTRING (object)->data; |
4556b700 | 3455 | |
22719df2 | 3456 | XSETFASTINT (zero, 0); |
f3e6605c RS |
3457 | #ifdef EMACS_HAS_USECS |
3458 | wait_reading_process_input (0, 20000, zero, 0); | |
3459 | #else | |
4556b700 | 3460 | wait_reading_process_input (1, 0, zero, 0); |
f3e6605c | 3461 | #endif |
4556b700 RS |
3462 | |
3463 | if (BUFFERP (object)) | |
d8a2934e | 3464 | buf = BUF_BYTE_ADDRESS (XBUFFER (object), offset); |
4556b700 | 3465 | else if (STRINGP (object)) |
b684d043 | 3466 | buf = offset + XSTRING (object)->data; |
4556b700 RS |
3467 | |
3468 | rv = 0; | |
3469 | } | |
3470 | else | |
3471 | /* This is a real error. */ | |
3472 | report_file_error ("writing to process", Fcons (proc, Qnil)); | |
d0d6b7c5 | 3473 | } |
4556b700 RS |
3474 | buf += rv; |
3475 | len -= rv; | |
3476 | this -= rv; | |
d0d6b7c5 | 3477 | } |
f76475ad | 3478 | |
4556b700 RS |
3479 | /* If we sent just part of the string, put in an EOF |
3480 | to force it through, before we send the rest. */ | |
3481 | if (len > 0) | |
3482 | Fprocess_send_eof (proc); | |
d0d6b7c5 JB |
3483 | } |
3484 | #endif | |
3485 | else | |
3486 | { | |
3487 | XPROCESS (proc)->raw_status_low = Qnil; | |
3488 | XPROCESS (proc)->raw_status_high = Qnil; | |
3489 | XPROCESS (proc)->status = Fcons (Qexit, Fcons (make_number (256), Qnil)); | |
3490 | XSETINT (XPROCESS (proc)->tick, ++process_tick); | |
3491 | deactivate_process (proc); | |
3492 | #ifdef VMS | |
3493 | error ("Error writing to process %s; closed it", procname); | |
3494 | #else | |
3495 | error ("SIGPIPE raised on process %s; closed it", procname); | |
3496 | #endif | |
3497 | } | |
6044e593 RS |
3498 | |
3499 | UNGCPRO; | |
d0d6b7c5 JB |
3500 | } |
3501 | ||
3502 | DEFUN ("process-send-region", Fprocess_send_region, Sprocess_send_region, | |
3503 | 3, 3, 0, | |
3504 | "Send current contents of region as input to PROCESS.\n\ | |
ebb9e16f JB |
3505 | PROCESS may be a process, a buffer, the name of a process or buffer, or\n\ |
3506 | nil, indicating the current buffer's process.\n\ | |
d0d6b7c5 JB |
3507 | Called from program, takes three arguments, PROCESS, START and END.\n\ |
3508 | If the region is more than 500 characters long,\n\ | |
3509 | it is sent in several bunches. This may happen even for shorter regions.\n\ | |
3510 | Output from processes can arrive in between bunches.") | |
3511 | (process, start, end) | |
3512 | Lisp_Object process, start, end; | |
3513 | { | |
3514 | Lisp_Object proc; | |
d8a2934e | 3515 | int start1, end1; |
d0d6b7c5 JB |
3516 | |
3517 | proc = get_process (process); | |
3518 | validate_region (&start, &end); | |
3519 | ||
3520 | if (XINT (start) < GPT && XINT (end) > GPT) | |
4da6dec8 | 3521 | move_gap (XINT (start)); |
d0d6b7c5 | 3522 | |
d8a2934e RS |
3523 | start1 = CHAR_TO_BYTE (XINT (start)); |
3524 | end1 = CHAR_TO_BYTE (XINT (end)); | |
3525 | send_process (proc, BYTE_POS_ADDR (start1), end1 - start1, | |
4556b700 | 3526 | Fcurrent_buffer ()); |
d0d6b7c5 JB |
3527 | |
3528 | return Qnil; | |
3529 | } | |
3530 | ||
3531 | DEFUN ("process-send-string", Fprocess_send_string, Sprocess_send_string, | |
3532 | 2, 2, 0, | |
3533 | "Send PROCESS the contents of STRING as input.\n\ | |
ebb9e16f JB |
3534 | PROCESS may be a process, a buffer, the name of a process or buffer, or\n\ |
3535 | nil, indicating the current buffer's process.\n\ | |
d0d6b7c5 JB |
3536 | If STRING is more than 500 characters long,\n\ |
3537 | it is sent in several bunches. This may happen even for shorter strings.\n\ | |
3538 | Output from processes can arrive in between bunches.") | |
3539 | (process, string) | |
3540 | Lisp_Object process, string; | |
3541 | { | |
3542 | Lisp_Object proc; | |
3543 | CHECK_STRING (string, 1); | |
3544 | proc = get_process (process); | |
1d2fc612 | 3545 | send_process (proc, XSTRING (string)->data, |
fc932ac6 | 3546 | STRING_BYTES (XSTRING (string)), string); |
d0d6b7c5 JB |
3547 | return Qnil; |
3548 | } | |
3549 | \f | |
b81ea5ef RS |
3550 | DEFUN ("process-running-child-p", Fprocess_running_child_p, |
3551 | Sprocess_running_child_p, 0, 1, 0, | |
3552 | "Return t if PROCESS has given the terminal to a child.\n\ | |
3553 | If the operating system does not make it possible to find out,\n\ | |
3554 | return t unconditionally.") | |
3555 | (process) | |
3556 | Lisp_Object process; | |
3557 | { | |
3558 | /* Initialize in case ioctl doesn't exist or gives an error, | |
3559 | in a way that will cause returning t. */ | |
3560 | int gid = 0; | |
3561 | Lisp_Object proc; | |
3562 | struct Lisp_Process *p; | |
3563 | ||
3564 | proc = get_process (process); | |
3565 | p = XPROCESS (proc); | |
3566 | ||
3567 | if (!EQ (p->childp, Qt)) | |
3568 | error ("Process %s is not a subprocess", | |
3569 | XSTRING (p->name)->data); | |
3570 | if (XINT (p->infd) < 0) | |
3571 | error ("Process %s is not active", | |
3572 | XSTRING (p->name)->data); | |
3573 | ||
3574 | #ifdef TIOCGPGRP | |
3575 | if (!NILP (p->subtty)) | |
3576 | ioctl (XFASTINT (p->subtty), TIOCGPGRP, &gid); | |
3577 | else | |
3578 | ioctl (XINT (p->infd), TIOCGPGRP, &gid); | |
3579 | #endif /* defined (TIOCGPGRP ) */ | |
3580 | ||
3581 | if (gid == XFASTINT (p->pid)) | |
3582 | return Qnil; | |
3583 | return Qt; | |
3584 | } | |
3585 | \f | |
d0d6b7c5 | 3586 | /* send a signal number SIGNO to PROCESS. |
b81ea5ef RS |
3587 | If CURRENT_GROUP is t, that means send to the process group |
3588 | that currently owns the terminal being used to communicate with PROCESS. | |
d0d6b7c5 | 3589 | This is used for various commands in shell mode. |
b81ea5ef RS |
3590 | If CURRENT_GROUP is lambda, that means send to the process group |
3591 | that currently owns the terminal, but only if it is NOT the shell itself. | |
3592 | ||
d0d6b7c5 | 3593 | If NOMSG is zero, insert signal-announcements into process's buffers |
b0310da4 JB |
3594 | right away. |
3595 | ||
3596 | If we can, we try to signal PROCESS by sending control characters | |
e333e864 | 3597 | down the pty. This allows us to signal inferiors who have changed |
b0310da4 | 3598 | their uid, for which killpg would return an EPERM error. */ |
d0d6b7c5 | 3599 | |
f9738840 | 3600 | static void |
d0d6b7c5 JB |
3601 | process_send_signal (process, signo, current_group, nomsg) |
3602 | Lisp_Object process; | |
3603 | int signo; | |
3604 | Lisp_Object current_group; | |
3605 | int nomsg; | |
3606 | { | |
3607 | Lisp_Object proc; | |
3608 | register struct Lisp_Process *p; | |
3609 | int gid; | |
3610 | int no_pgrp = 0; | |
3611 | ||
3612 | proc = get_process (process); | |
3613 | p = XPROCESS (proc); | |
3614 | ||
3615 | if (!EQ (p->childp, Qt)) | |
3616 | error ("Process %s is not a subprocess", | |
3617 | XSTRING (p->name)->data); | |
a9f2c884 | 3618 | if (XINT (p->infd) < 0) |
d0d6b7c5 JB |
3619 | error ("Process %s is not active", |
3620 | XSTRING (p->name)->data); | |
3621 | ||
3622 | if (NILP (p->pty_flag)) | |
3623 | current_group = Qnil; | |
3624 | ||
d0d6b7c5 JB |
3625 | /* If we are using pgrps, get a pgrp number and make it negative. */ |
3626 | if (!NILP (current_group)) | |
3627 | { | |
b0310da4 | 3628 | #ifdef SIGNALS_VIA_CHARACTERS |
d0d6b7c5 JB |
3629 | /* If possible, send signals to the entire pgrp |
3630 | by sending an input character to it. */ | |
b0310da4 | 3631 | |
6be429b1 JB |
3632 | /* TERMIOS is the latest and bestest, and seems most likely to |
3633 | work. If the system has it, use it. */ | |
3634 | #ifdef HAVE_TERMIOS | |
3635 | struct termios t; | |
3636 | ||
3637 | switch (signo) | |
3638 | { | |
3639 | case SIGINT: | |
a9f2c884 | 3640 | tcgetattr (XINT (p->infd), &t); |
4556b700 | 3641 | send_process (proc, &t.c_cc[VINTR], 1, Qnil); |
a87b802f | 3642 | return; |
6be429b1 JB |
3643 | |
3644 | case SIGQUIT: | |
a9f2c884 | 3645 | tcgetattr (XINT (p->infd), &t); |
4556b700 | 3646 | send_process (proc, &t.c_cc[VQUIT], 1, Qnil); |
a87b802f | 3647 | return; |
6be429b1 JB |
3648 | |
3649 | case SIGTSTP: | |
a9f2c884 | 3650 | tcgetattr (XINT (p->infd), &t); |
d0adf46f | 3651 | #if defined (VSWTCH) && !defined (PREFER_VSUSP) |
4556b700 | 3652 | send_process (proc, &t.c_cc[VSWTCH], 1, Qnil); |
6be429b1 | 3653 | #else |
4556b700 | 3654 | send_process (proc, &t.c_cc[VSUSP], 1, Qnil); |
6be429b1 | 3655 | #endif |
a87b802f | 3656 | return; |
6be429b1 JB |
3657 | } |
3658 | ||
3659 | #else /* ! HAVE_TERMIOS */ | |
3660 | ||
b0310da4 JB |
3661 | /* On Berkeley descendants, the following IOCTL's retrieve the |
3662 | current control characters. */ | |
d0d6b7c5 | 3663 | #if defined (TIOCGLTC) && defined (TIOCGETC) |
b0310da4 | 3664 | |
d0d6b7c5 JB |
3665 | struct tchars c; |
3666 | struct ltchars lc; | |
3667 | ||
3668 | switch (signo) | |
3669 | { | |
3670 | case SIGINT: | |
a9f2c884 | 3671 | ioctl (XINT (p->infd), TIOCGETC, &c); |
4556b700 | 3672 | send_process (proc, &c.t_intrc, 1, Qnil); |
f9738840 | 3673 | return; |
d0d6b7c5 | 3674 | case SIGQUIT: |
a9f2c884 | 3675 | ioctl (XINT (p->infd), TIOCGETC, &c); |
4556b700 | 3676 | send_process (proc, &c.t_quitc, 1, Qnil); |
f9738840 | 3677 | return; |
0ad77c54 | 3678 | #ifdef SIGTSTP |
d0d6b7c5 | 3679 | case SIGTSTP: |
a9f2c884 | 3680 | ioctl (XINT (p->infd), TIOCGLTC, &lc); |
4556b700 | 3681 | send_process (proc, &lc.t_suspc, 1, Qnil); |
f9738840 | 3682 | return; |
b0310da4 | 3683 | #endif /* ! defined (SIGTSTP) */ |
d0d6b7c5 | 3684 | } |
b0310da4 JB |
3685 | |
3686 | #else /* ! defined (TIOCGLTC) && defined (TIOCGETC) */ | |
3687 | ||
3688 | /* On SYSV descendants, the TCGETA ioctl retrieves the current control | |
3689 | characters. */ | |
3690 | #ifdef TCGETA | |
d0d6b7c5 JB |
3691 | struct termio t; |
3692 | switch (signo) | |
3693 | { | |
3694 | case SIGINT: | |
a9f2c884 | 3695 | ioctl (XINT (p->infd), TCGETA, &t); |
4556b700 | 3696 | send_process (proc, &t.c_cc[VINTR], 1, Qnil); |
f9738840 | 3697 | return; |
d0d6b7c5 | 3698 | case SIGQUIT: |
a9f2c884 | 3699 | ioctl (XINT (p->infd), TCGETA, &t); |
4556b700 | 3700 | send_process (proc, &t.c_cc[VQUIT], 1, Qnil); |
f9738840 | 3701 | return; |
7d79e3b4 | 3702 | #ifdef SIGTSTP |
d0d6b7c5 | 3703 | case SIGTSTP: |
a9f2c884 | 3704 | ioctl (XINT (p->infd), TCGETA, &t); |
4556b700 | 3705 | send_process (proc, &t.c_cc[VSWTCH], 1, Qnil); |
f9738840 | 3706 | return; |
b0310da4 | 3707 | #endif /* ! defined (SIGTSTP) */ |
d0d6b7c5 | 3708 | } |
b0310da4 JB |
3709 | #else /* ! defined (TCGETA) */ |
3710 | Your configuration files are messed up. | |
3711 | /* If your system configuration files define SIGNALS_VIA_CHARACTERS, | |
3712 | you'd better be using one of the alternatives above! */ | |
3713 | #endif /* ! defined (TCGETA) */ | |
3714 | #endif /* ! defined (TIOCGLTC) && defined (TIOCGETC) */ | |
6be429b1 | 3715 | #endif /* ! defined HAVE_TERMIOS */ |
b0310da4 | 3716 | #endif /* ! defined (SIGNALS_VIA_CHARACTERS) */ |
d0d6b7c5 | 3717 | |
301c3fe4 | 3718 | #ifdef TIOCGPGRP |
d0d6b7c5 JB |
3719 | /* Get the pgrp using the tty itself, if we have that. |
3720 | Otherwise, use the pty to get the pgrp. | |
3721 | On pfa systems, saka@pfu.fujitsu.co.JP writes: | |
b0310da4 JB |
3722 | "TIOCGPGRP symbol defined in sys/ioctl.h at E50. |
3723 | But, TIOCGPGRP does not work on E50 ;-P works fine on E60" | |
d0d6b7c5 JB |
3724 | His patch indicates that if TIOCGPGRP returns an error, then |
3725 | we should just assume that p->pid is also the process group id. */ | |
3726 | { | |
3727 | int err; | |
3728 | ||
3729 | if (!NILP (p->subtty)) | |
3730 | err = ioctl (XFASTINT (p->subtty), TIOCGPGRP, &gid); | |
3731 | else | |
a9f2c884 | 3732 | err = ioctl (XINT (p->infd), TIOCGPGRP, &gid); |
d0d6b7c5 JB |
3733 | |
3734 | #ifdef pfa | |
3735 | if (err == -1) | |
3736 | gid = - XFASTINT (p->pid); | |
301c3fe4 | 3737 | #endif /* ! defined (pfa) */ |
d0d6b7c5 JB |
3738 | } |
3739 | if (gid == -1) | |
3740 | no_pgrp = 1; | |
3741 | else | |
3742 | gid = - gid; | |
b0310da4 | 3743 | #else /* ! defined (TIOCGPGRP ) */ |
301c3fe4 JB |
3744 | /* Can't select pgrps on this system, so we know that |
3745 | the child itself heads the pgrp. */ | |
3746 | gid = - XFASTINT (p->pid); | |
3747 | #endif /* ! defined (TIOCGPGRP ) */ | |
b81ea5ef RS |
3748 | |
3749 | /* If current_group is lambda, and the shell owns the terminal, | |
3750 | don't send any signal. */ | |
3751 | if (EQ (current_group, Qlambda) && gid == - XFASTINT (p->pid)) | |
3752 | return; | |
d0d6b7c5 JB |
3753 | } |
3754 | else | |
3755 | gid = - XFASTINT (p->pid); | |
d0d6b7c5 JB |
3756 | |
3757 | switch (signo) | |
3758 | { | |
3759 | #ifdef SIGCONT | |
3760 | case SIGCONT: | |
3761 | p->raw_status_low = Qnil; | |
3762 | p->raw_status_high = Qnil; | |
3763 | p->status = Qrun; | |
3764 | XSETINT (p->tick, ++process_tick); | |
3765 | if (!nomsg) | |
3766 | status_notify (); | |
3767 | break; | |
301c3fe4 | 3768 | #endif /* ! defined (SIGCONT) */ |
d0d6b7c5 JB |
3769 | case SIGINT: |
3770 | #ifdef VMS | |
4556b700 | 3771 | send_process (proc, "\003", 1, Qnil); /* ^C */ |
d0d6b7c5 JB |
3772 | goto whoosh; |
3773 | #endif | |
3774 | case SIGQUIT: | |
3775 | #ifdef VMS | |
4556b700 | 3776 | send_process (proc, "\031", 1, Qnil); /* ^Y */ |
d0d6b7c5 JB |
3777 | goto whoosh; |
3778 | #endif | |
3779 | case SIGKILL: | |
3780 | #ifdef VMS | |
3781 | sys$forcex (&(XFASTINT (p->pid)), 0, 1); | |
3782 | whoosh: | |
3783 | #endif | |
a9f2c884 | 3784 | flush_pending_output (XINT (p->infd)); |
d0d6b7c5 JB |
3785 | break; |
3786 | } | |
3787 | ||
3788 | /* If we don't have process groups, send the signal to the immediate | |
3789 | subprocess. That isn't really right, but it's better than any | |
3790 | obvious alternative. */ | |
3791 | if (no_pgrp) | |
3792 | { | |
3793 | kill (XFASTINT (p->pid), signo); | |
3794 | return; | |
3795 | } | |
3796 | ||
3797 | /* gid may be a pid, or minus a pgrp's number */ | |
3798 | #ifdef TIOCSIGSEND | |
3799 | if (!NILP (current_group)) | |
a9f2c884 | 3800 | ioctl (XINT (p->infd), TIOCSIGSEND, signo); |
d0d6b7c5 JB |
3801 | else |
3802 | { | |
3803 | gid = - XFASTINT (p->pid); | |
3804 | kill (gid, signo); | |
3805 | } | |
301c3fe4 | 3806 | #else /* ! defined (TIOCSIGSEND) */ |
d0d6b7c5 | 3807 | EMACS_KILLPG (-gid, signo); |
301c3fe4 | 3808 | #endif /* ! defined (TIOCSIGSEND) */ |
d0d6b7c5 JB |
3809 | } |
3810 | ||
3811 | DEFUN ("interrupt-process", Finterrupt_process, Sinterrupt_process, 0, 2, 0, | |
7744ca33 | 3812 | "Interrupt process PROCESS.\n\ |
ebb9e16f | 3813 | PROCESS may be a process, a buffer, or the name of a process or buffer.\n\ |
e333e864 | 3814 | nil or no arg means current buffer's process.\n\ |
d0d6b7c5 JB |
3815 | Second arg CURRENT-GROUP non-nil means send signal to\n\ |
3816 | the current process-group of the process's controlling terminal\n\ | |
3817 | rather than to the process's own process group.\n\ | |
3818 | If the process is a shell, this means interrupt current subjob\n\ | |
b81ea5ef RS |
3819 | rather than the shell.\n\ |
3820 | \n\ | |
3821 | If CURRENT-GROUP is `lambda', and if the shell owns the terminal,\n\ | |
3822 | don't send the signal.") | |
d0d6b7c5 JB |
3823 | (process, current_group) |
3824 | Lisp_Object process, current_group; | |
3825 | { | |
3826 | process_send_signal (process, SIGINT, current_group, 0); | |
3827 | return process; | |
3828 | } | |
3829 | ||
3830 | DEFUN ("kill-process", Fkill_process, Skill_process, 0, 2, 0, | |
3831 | "Kill process PROCESS. May be process or name of one.\n\ | |
3832 | See function `interrupt-process' for more details on usage.") | |
3833 | (process, current_group) | |
3834 | Lisp_Object process, current_group; | |
3835 | { | |
3836 | process_send_signal (process, SIGKILL, current_group, 0); | |
3837 | return process; | |
3838 | } | |
3839 | ||
3840 | DEFUN ("quit-process", Fquit_process, Squit_process, 0, 2, 0, | |
3841 | "Send QUIT signal to process PROCESS. May be process or name of one.\n\ | |
3842 | See function `interrupt-process' for more details on usage.") | |
3843 | (process, current_group) | |
3844 | Lisp_Object process, current_group; | |
3845 | { | |
3846 | process_send_signal (process, SIGQUIT, current_group, 0); | |
3847 | return process; | |
3848 | } | |
3849 | ||
3850 | DEFUN ("stop-process", Fstop_process, Sstop_process, 0, 2, 0, | |
3851 | "Stop process PROCESS. May be process or name of one.\n\ | |
3852 | See function `interrupt-process' for more details on usage.") | |
3853 | (process, current_group) | |
3854 | Lisp_Object process, current_group; | |
3855 | { | |
3856 | #ifndef SIGTSTP | |
3857 | error ("no SIGTSTP support"); | |
3858 | #else | |
3859 | process_send_signal (process, SIGTSTP, current_group, 0); | |
3860 | #endif | |
3861 | return process; | |
3862 | } | |
3863 | ||
3864 | DEFUN ("continue-process", Fcontinue_process, Scontinue_process, 0, 2, 0, | |
3865 | "Continue process PROCESS. May be process or name of one.\n\ | |
3866 | See function `interrupt-process' for more details on usage.") | |
3867 | (process, current_group) | |
3868 | Lisp_Object process, current_group; | |
3869 | { | |
3870 | #ifdef SIGCONT | |
3871 | process_send_signal (process, SIGCONT, current_group, 0); | |
3872 | #else | |
3873 | error ("no SIGCONT support"); | |
3874 | #endif | |
3875 | return process; | |
3876 | } | |
3877 | ||
3878 | DEFUN ("signal-process", Fsignal_process, Ssignal_process, | |
3879 | 2, 2, "nProcess number: \nnSignal code: ", | |
4766242d RS |
3880 | "Send the process with process id PID the signal with code SIGCODE.\n\ |
3881 | PID must be an integer. The process need not be a child of this Emacs.\n\ | |
3882 | SIGCODE may be an integer, or a symbol whose name is a signal name.") | |
3883 | (pid, sigcode) | |
3884 | Lisp_Object pid, sigcode; | |
d0d6b7c5 JB |
3885 | { |
3886 | CHECK_NUMBER (pid, 0); | |
4766242d RS |
3887 | |
3888 | #define handle_signal(NAME, VALUE) \ | |
3889 | else if (!strcmp (name, NAME)) \ | |
3890 | XSETINT (sigcode, VALUE) | |
3891 | ||
3892 | if (INTEGERP (sigcode)) | |
3893 | ; | |
3894 | else | |
3895 | { | |
3896 | unsigned char *name; | |
3897 | ||
3898 | CHECK_SYMBOL (sigcode, 1); | |
3899 | name = XSYMBOL (sigcode)->name->data; | |
3900 | ||
3901 | if (0) | |
3902 | ; | |
3903 | #ifdef SIGHUP | |
3904 | handle_signal ("SIGHUP", SIGHUP); | |
3905 | #endif | |
3906 | #ifdef SIGINT | |
3907 | handle_signal ("SIGINT", SIGINT); | |
3908 | #endif | |
3909 | #ifdef SIGQUIT | |
3910 | handle_signal ("SIGQUIT", SIGQUIT); | |
3911 | #endif | |
3912 | #ifdef SIGILL | |
3913 | handle_signal ("SIGILL", SIGILL); | |
3914 | #endif | |
3915 | #ifdef SIGABRT | |
3916 | handle_signal ("SIGABRT", SIGABRT); | |
3917 | #endif | |
3918 | #ifdef SIGEMT | |
3919 | handle_signal ("SIGEMT", SIGEMT); | |
3920 | #endif | |
3921 | #ifdef SIGKILL | |
3922 | handle_signal ("SIGKILL", SIGKILL); | |
3923 | #endif | |
3924 | #ifdef SIGFPE | |
3925 | handle_signal ("SIGFPE", SIGFPE); | |
3926 | #endif | |
3927 | #ifdef SIGBUS | |
3928 | handle_signal ("SIGBUS", SIGBUS); | |
3929 | #endif | |
3930 | #ifdef SIGSEGV | |
3931 | handle_signal ("SIGSEGV", SIGSEGV); | |
3932 | #endif | |
3933 | #ifdef SIGSYS | |
3934 | handle_signal ("SIGSYS", SIGSYS); | |
3935 | #endif | |
3936 | #ifdef SIGPIPE | |
3937 | handle_signal ("SIGPIPE", SIGPIPE); | |
3938 | #endif | |
3939 | #ifdef SIGALRM | |
3940 | handle_signal ("SIGALRM", SIGALRM); | |
3941 | #endif | |
3942 | #ifdef SIGTERM | |
3943 | handle_signal ("SIGTERM", SIGTERM); | |
3944 | #endif | |
3945 | #ifdef SIGURG | |
3946 | handle_signal ("SIGURG", SIGURG); | |
3947 | #endif | |
3948 | #ifdef SIGSTOP | |
3949 | handle_signal ("SIGSTOP", SIGSTOP); | |
3950 | #endif | |
3951 | #ifdef SIGTSTP | |
3952 | handle_signal ("SIGTSTP", SIGTSTP); | |
3953 | #endif | |
3954 | #ifdef SIGCONT | |
3955 | handle_signal ("SIGCONT", SIGCONT); | |
3956 | #endif | |
3957 | #ifdef SIGCHLD | |
3958 | handle_signal ("SIGCHLD", SIGCHLD); | |
3959 | #endif | |
3960 | #ifdef SIGTTIN | |
3961 | handle_signal ("SIGTTIN", SIGTTIN); | |
3962 | #endif | |
3963 | #ifdef SIGTTOU | |
3964 | handle_signal ("SIGTTOU", SIGTTOU); | |
3965 | #endif | |
3966 | #ifdef SIGIO | |
3967 | handle_signal ("SIGIO", SIGIO); | |
3968 | #endif | |
3969 | #ifdef SIGXCPU | |
3970 | handle_signal ("SIGXCPU", SIGXCPU); | |
3971 | #endif | |
3972 | #ifdef SIGXFSZ | |
3973 | handle_signal ("SIGXFSZ", SIGXFSZ); | |
3974 | #endif | |
3975 | #ifdef SIGVTALRM | |
3976 | handle_signal ("SIGVTALRM", SIGVTALRM); | |
3977 | #endif | |
3978 | #ifdef SIGPROF | |
3979 | handle_signal ("SIGPROF", SIGPROF); | |
3980 | #endif | |
3981 | #ifdef SIGWINCH | |
3982 | handle_signal ("SIGWINCH", SIGWINCH); | |
3983 | #endif | |
3984 | #ifdef SIGINFO | |
3985 | handle_signal ("SIGINFO", SIGINFO); | |
3986 | #endif | |
3987 | #ifdef SIGUSR1 | |
3988 | handle_signal ("SIGUSR1", SIGUSR1); | |
3989 | #endif | |
3990 | #ifdef SIGUSR2 | |
3991 | handle_signal ("SIGUSR2", SIGUSR2); | |
3992 | #endif | |
3993 | else | |
9fa195a2 | 3994 | error ("Undefined signal name %s", name); |
4766242d RS |
3995 | } |
3996 | ||
3997 | #undef handle_signal | |
3998 | ||
4766242d | 3999 | return make_number (kill (XINT (pid), XINT (sigcode))); |
d0d6b7c5 JB |
4000 | } |
4001 | ||
4002 | DEFUN ("process-send-eof", Fprocess_send_eof, Sprocess_send_eof, 0, 1, 0, | |
4003 | "Make PROCESS see end-of-file in its input.\n\ | |
7744ca33 | 4004 | EOF comes after any text already sent to it.\n\ |
ebb9e16f | 4005 | PROCESS may be a process, a buffer, the name of a process or buffer, or\n\ |
d33a00f2 RS |
4006 | nil, indicating the current buffer's process.\n\ |
4007 | If PROCESS is a network connection, or is a process communicating\n\ | |
4008 | through a pipe (as opposed to a pty), then you cannot send any more\n\ | |
4009 | text to PROCESS after you call this function.") | |
d0d6b7c5 JB |
4010 | (process) |
4011 | Lisp_Object process; | |
4012 | { | |
4013 | Lisp_Object proc; | |
de7fbd09 | 4014 | struct coding_system *coding; |
d0d6b7c5 JB |
4015 | |
4016 | proc = get_process (process); | |
de7fbd09 | 4017 | coding = proc_encode_coding_system[XINT (XPROCESS (proc)->outfd)]; |
577d03d5 RS |
4018 | |
4019 | /* Make sure the process is really alive. */ | |
4020 | if (! NILP (XPROCESS (proc)->raw_status_low)) | |
4021 | update_status (XPROCESS (proc)); | |
4022 | if (! EQ (XPROCESS (proc)->status, Qrun)) | |
dcf970e6 | 4023 | error ("Process %s not running", XSTRING (XPROCESS (proc)->name)->data); |
577d03d5 | 4024 | |
de7fbd09 KH |
4025 | if (CODING_REQUIRE_FLUSHING (coding)) |
4026 | { | |
4027 | coding->mode |= CODING_MODE_LAST_BLOCK; | |
4028 | send_process (proc, "", 0, Qnil); | |
4029 | } | |
4030 | ||
d0d6b7c5 | 4031 | #ifdef VMS |
4556b700 | 4032 | send_process (proc, "\032", 1, Qnil); /* ^z */ |
d0d6b7c5 JB |
4033 | #else |
4034 | if (!NILP (XPROCESS (proc)->pty_flag)) | |
4556b700 | 4035 | send_process (proc, "\004", 1, Qnil); |
d0d6b7c5 JB |
4036 | else |
4037 | { | |
4525f571 RS |
4038 | int old_outfd, new_outfd; |
4039 | ||
93853f3d | 4040 | #ifdef HAVE_SHUTDOWN |
02f55c4b RS |
4041 | /* If this is a network connection, or socketpair is used |
4042 | for communication with the subprocess, call shutdown to cause EOF. | |
4043 | (In some old system, shutdown to socketpair doesn't work. | |
4044 | Then we just can't win.) */ | |
4045 | if (NILP (XPROCESS (proc)->pid) | |
4046 | || XINT (XPROCESS (proc)->outfd) == XINT (XPROCESS (proc)->infd)) | |
4047 | shutdown (XINT (XPROCESS (proc)->outfd), 1); | |
4048 | /* In case of socketpair, outfd == infd, so don't close it. */ | |
4049 | if (XINT (XPROCESS (proc)->outfd) != XINT (XPROCESS (proc)->infd)) | |
68c45bf0 | 4050 | emacs_close (XINT (XPROCESS (proc)->outfd)); |
93853f3d | 4051 | #else /* not HAVE_SHUTDOWN */ |
68c45bf0 | 4052 | emacs_close (XINT (XPROCESS (proc)->outfd)); |
93853f3d | 4053 | #endif /* not HAVE_SHUTDOWN */ |
68c45bf0 | 4054 | new_outfd = emacs_open (NULL_DEVICE, O_WRONLY, 0); |
4525f571 RS |
4055 | old_outfd = XINT (XPROCESS (proc)->outfd); |
4056 | ||
4057 | if (!proc_encode_coding_system[new_outfd]) | |
4058 | proc_encode_coding_system[new_outfd] | |
4059 | = (struct coding_system *) xmalloc (sizeof (struct coding_system)); | |
4060 | bcopy (proc_encode_coding_system[old_outfd], | |
4061 | proc_encode_coding_system[new_outfd], | |
4062 | sizeof (struct coding_system)); | |
4063 | bzero (proc_encode_coding_system[old_outfd], | |
4064 | sizeof (struct coding_system)); | |
4065 | ||
4066 | XSETINT (XPROCESS (proc)->outfd, new_outfd); | |
d0d6b7c5 JB |
4067 | } |
4068 | #endif /* VMS */ | |
d0d6b7c5 JB |
4069 | return process; |
4070 | } | |
4071 | ||
4072 | /* Kill all processes associated with `buffer'. | |
4073 | If `buffer' is nil, kill all processes */ | |
4074 | ||
6b53bb85 | 4075 | void |
d0d6b7c5 JB |
4076 | kill_buffer_processes (buffer) |
4077 | Lisp_Object buffer; | |
4078 | { | |
4079 | Lisp_Object tail, proc; | |
4080 | ||
70949dac | 4081 | for (tail = Vprocess_alist; GC_CONSP (tail); tail = XCDR (tail)) |
d0d6b7c5 | 4082 | { |
70949dac | 4083 | proc = XCDR (XCAR (tail)); |
b5b502d6 | 4084 | if (GC_PROCESSP (proc) |
d0d6b7c5 JB |
4085 | && (NILP (buffer) || EQ (XPROCESS (proc)->buffer, buffer))) |
4086 | { | |
4087 | if (NETCONN_P (proc)) | |
e1ab4959 | 4088 | Fdelete_process (proc); |
a9f2c884 | 4089 | else if (XINT (XPROCESS (proc)->infd) >= 0) |
d0d6b7c5 JB |
4090 | process_send_signal (proc, SIGHUP, Qnil, 1); |
4091 | } | |
4092 | } | |
4093 | } | |
4094 | \f | |
4095 | /* On receipt of a signal that a child status has changed, | |
4096 | loop asking about children with changed statuses until | |
4097 | the system says there are no more. | |
4098 | All we do is change the status; | |
4099 | we do not run sentinels or print notifications. | |
4100 | That is saved for the next time keyboard input is done, | |
4101 | in order to avoid timing errors. */ | |
4102 | ||
4103 | /** WARNING: this can be called during garbage collection. | |
4104 | Therefore, it must not be fooled by the presence of mark bits in | |
4105 | Lisp objects. */ | |
4106 | ||
4107 | /** USG WARNING: Although it is not obvious from the documentation | |
4108 | in signal(2), on a USG system the SIGCLD handler MUST NOT call | |
4109 | signal() before executing at least one wait(), otherwise the handler | |
4110 | will be called again, resulting in an infinite loop. The relevant | |
4111 | portion of the documentation reads "SIGCLD signals will be queued | |
4112 | and the signal-catching function will be continually reentered until | |
4113 | the queue is empty". Invoking signal() causes the kernel to reexamine | |
4114 | the SIGCLD queue. Fred Fish, UniSoft Systems Inc. */ | |
4115 | ||
4116 | SIGTYPE | |
4117 | sigchld_handler (signo) | |
4118 | int signo; | |
4119 | { | |
4120 | int old_errno = errno; | |
4121 | Lisp_Object proc; | |
4122 | register struct Lisp_Process *p; | |
6be429b1 | 4123 | extern EMACS_TIME *input_available_clear_time; |
d0d6b7c5 JB |
4124 | |
4125 | #ifdef BSD4_1 | |
4126 | extern int sigheld; | |
4127 | sigheld |= sigbit (SIGCHLD); | |
4128 | #endif | |
4129 | ||
4130 | while (1) | |
4131 | { | |
4132 | register int pid; | |
4133 | WAITTYPE w; | |
4134 | Lisp_Object tail; | |
4135 | ||
4136 | #ifdef WNOHANG | |
4137 | #ifndef WUNTRACED | |
4138 | #define WUNTRACED 0 | |
4139 | #endif /* no WUNTRACED */ | |
4140 | /* Keep trying to get a status until we get a definitive result. */ | |
4141 | do | |
4142 | { | |
4143 | errno = 0; | |
4144 | pid = wait3 (&w, WNOHANG | WUNTRACED, 0); | |
4145 | } | |
4146 | while (pid <= 0 && errno == EINTR); | |
4147 | ||
4148 | if (pid <= 0) | |
4149 | { | |
4150 | /* A real failure. We have done all our job, so return. */ | |
4151 | ||
4152 | /* USG systems forget handlers when they are used; | |
4153 | must reestablish each time */ | |
3c0ee47b | 4154 | #if defined (USG) && !defined (POSIX_SIGNALS) |
d0d6b7c5 JB |
4155 | signal (signo, sigchld_handler); /* WARNING - must come after wait3() */ |
4156 | #endif | |
4157 | #ifdef BSD4_1 | |
4158 | sigheld &= ~sigbit (SIGCHLD); | |
4159 | sigrelse (SIGCHLD); | |
4160 | #endif | |
4161 | errno = old_errno; | |
4162 | return; | |
4163 | } | |
4164 | #else | |
4165 | pid = wait (&w); | |
4166 | #endif /* no WNOHANG */ | |
4167 | ||
4168 | /* Find the process that signaled us, and record its status. */ | |
4169 | ||
4170 | p = 0; | |
70949dac | 4171 | for (tail = Vprocess_alist; CONSP (tail); tail = XCDR (tail)) |
d0d6b7c5 | 4172 | { |
70949dac | 4173 | proc = XCDR (XCAR (tail)); |
d0d6b7c5 JB |
4174 | p = XPROCESS (proc); |
4175 | if (EQ (p->childp, Qt) && XFASTINT (p->pid) == pid) | |
4176 | break; | |
4177 | p = 0; | |
4178 | } | |
4179 | ||
4180 | /* Look for an asynchronous process whose pid hasn't been filled | |
4181 | in yet. */ | |
4182 | if (p == 0) | |
70949dac | 4183 | for (tail = Vprocess_alist; CONSP (tail); tail = XCDR (tail)) |
d0d6b7c5 | 4184 | { |
70949dac | 4185 | proc = XCDR (XCAR (tail)); |
d0d6b7c5 | 4186 | p = XPROCESS (proc); |
bcd69aea | 4187 | if (INTEGERP (p->pid) && XINT (p->pid) == -1) |
d0d6b7c5 JB |
4188 | break; |
4189 | p = 0; | |
4190 | } | |
4191 | ||
4192 | /* Change the status of the process that was found. */ | |
4193 | if (p != 0) | |
4194 | { | |
4195 | union { int i; WAITTYPE wt; } u; | |
e98d950b | 4196 | int clear_desc_flag = 0; |
d0d6b7c5 JB |
4197 | |
4198 | XSETINT (p->tick, ++process_tick); | |
4199 | u.wt = w; | |
5fc0154c RS |
4200 | XSETINT (p->raw_status_low, u.i & 0xffff); |
4201 | XSETINT (p->raw_status_high, u.i >> 16); | |
d0d6b7c5 JB |
4202 | |
4203 | /* If process has terminated, stop waiting for its output. */ | |
e98d950b RS |
4204 | if ((WIFSIGNALED (w) || WIFEXITED (w)) |
4205 | && XINT (p->infd) >= 0) | |
4206 | clear_desc_flag = 1; | |
4207 | ||
4208 | /* We use clear_desc_flag to avoid a compiler bug in Microsoft C. */ | |
4209 | if (clear_desc_flag) | |
4210 | { | |
4211 | FD_CLR (XINT (p->infd), &input_wait_mask); | |
4212 | FD_CLR (XINT (p->infd), &non_keyboard_wait_mask); | |
4213 | } | |
6be429b1 JB |
4214 | |
4215 | /* Tell wait_reading_process_input that it needs to wake up and | |
4216 | look around. */ | |
4217 | if (input_available_clear_time) | |
4218 | EMACS_SET_SECS_USECS (*input_available_clear_time, 0, 0); | |
d0d6b7c5 JB |
4219 | } |
4220 | ||
4221 | /* There was no asynchronous process found for that id. Check | |
4222 | if we have a synchronous process. */ | |
4223 | else | |
4224 | { | |
4225 | synch_process_alive = 0; | |
4226 | ||
4227 | /* Report the status of the synchronous process. */ | |
4228 | if (WIFEXITED (w)) | |
4229 | synch_process_retcode = WRETCODE (w); | |
4230 | else if (WIFSIGNALED (w)) | |
b97ad9ea RS |
4231 | { |
4232 | int code = WTERMSIG (w); | |
68c45bf0 PE |
4233 | char *signame; |
4234 | ||
ca9c0567 | 4235 | synchronize_system_messages_locale (); |
68c45bf0 | 4236 | signame = strsignal (code); |
b97ad9ea | 4237 | |
b97ad9ea RS |
4238 | if (signame == 0) |
4239 | signame = "unknown"; | |
4240 | ||
4241 | synch_process_death = signame; | |
4242 | } | |
6be429b1 JB |
4243 | |
4244 | /* Tell wait_reading_process_input that it needs to wake up and | |
4245 | look around. */ | |
4246 | if (input_available_clear_time) | |
4247 | EMACS_SET_SECS_USECS (*input_available_clear_time, 0, 0); | |
d0d6b7c5 JB |
4248 | } |
4249 | ||
4250 | /* On some systems, we must return right away. | |
4251 | If any more processes want to signal us, we will | |
4252 | get another signal. | |
4253 | Otherwise (on systems that have WNOHANG), loop around | |
4254 | to use up all the processes that have something to tell us. */ | |
e98d950b | 4255 | #if defined (USG) && ! (defined (HPUX) && defined (WNOHANG)) || defined (WINDOWSNT) |
3c0ee47b | 4256 | #if defined (USG) && ! defined (POSIX_SIGNALS) |
d0d6b7c5 JB |
4257 | signal (signo, sigchld_handler); |
4258 | #endif | |
4259 | errno = old_errno; | |
4260 | return; | |
4261 | #endif /* USG, but not HPUX with WNOHANG */ | |
4262 | } | |
4263 | } | |
4264 | \f | |
4265 | ||
4266 | static Lisp_Object | |
4267 | exec_sentinel_unwind (data) | |
4268 | Lisp_Object data; | |
4269 | { | |
70949dac | 4270 | XPROCESS (XCAR (data))->sentinel = XCDR (data); |
d0d6b7c5 JB |
4271 | return Qnil; |
4272 | } | |
4273 | ||
3b9a3dfa RS |
4274 | static Lisp_Object |
4275 | exec_sentinel_error_handler (error) | |
4276 | Lisp_Object error; | |
4277 | { | |
4278 | cmd_error_internal (error, "error in process sentinel: "); | |
4279 | Vinhibit_quit = Qt; | |
4280 | update_echo_area (); | |
833ba342 | 4281 | Fsleep_for (make_number (2), Qnil); |
8c983bf2 | 4282 | return Qt; |
3b9a3dfa RS |
4283 | } |
4284 | ||
d0d6b7c5 JB |
4285 | static void |
4286 | exec_sentinel (proc, reason) | |
4287 | Lisp_Object proc, reason; | |
4288 | { | |
dfc21838 | 4289 | Lisp_Object sentinel, obuffer, odeactivate, okeymap; |
d0d6b7c5 JB |
4290 | register struct Lisp_Process *p = XPROCESS (proc); |
4291 | int count = specpdl_ptr - specpdl; | |
4da2f5be | 4292 | int outer_running_asynch_code = running_asynch_code; |
bbce7d72 | 4293 | int waiting = waiting_for_user_input_p; |
d0d6b7c5 | 4294 | |
dfc21838 RS |
4295 | /* No need to gcpro these, because all we do with them later |
4296 | is test them for EQness, and none of them should be a string. */ | |
8fb3cf64 | 4297 | odeactivate = Vdeactivate_mark; |
dfc21838 RS |
4298 | XSETBUFFER (obuffer, current_buffer); |
4299 | okeymap = current_buffer->keymap; | |
4300 | ||
d0d6b7c5 JB |
4301 | sentinel = p->sentinel; |
4302 | if (NILP (sentinel)) | |
4303 | return; | |
4304 | ||
4305 | /* Zilch the sentinel while it's running, to avoid recursive invocations; | |
4306 | assure that it gets restored no matter how the sentinel exits. */ | |
4307 | p->sentinel = Qnil; | |
4308 | record_unwind_protect (exec_sentinel_unwind, Fcons (proc, sentinel)); | |
4309 | /* Inhibit quit so that random quits don't screw up a running filter. */ | |
4310 | specbind (Qinhibit_quit, Qt); | |
6545aada | 4311 | specbind (Qlast_nonmenu_event, Qt); |
3b9a3dfa | 4312 | |
4da2f5be RS |
4313 | /* In case we get recursively called, |
4314 | and we already saved the match data nonrecursively, | |
4315 | save the same match data in safely recursive fashion. */ | |
4316 | if (outer_running_asynch_code) | |
4317 | { | |
4318 | Lisp_Object tem; | |
dd130227 | 4319 | tem = Fmatch_data (Qnil, Qnil); |
4da2f5be | 4320 | restore_match_data (); |
8f1ecd05 RS |
4321 | record_unwind_protect (Fset_match_data, Fmatch_data (Qnil, Qnil)); |
4322 | Fset_match_data (tem); | |
4da2f5be RS |
4323 | } |
4324 | ||
4325 | /* For speed, if a search happens within this code, | |
4326 | save the match data in a special nonrecursive fashion. */ | |
7074fde6 | 4327 | running_asynch_code = 1; |
4da2f5be | 4328 | |
3b9a3dfa RS |
4329 | internal_condition_case_1 (read_process_output_call, |
4330 | Fcons (sentinel, | |
4331 | Fcons (proc, Fcons (reason, Qnil))), | |
4332 | !NILP (Vdebug_on_error) ? Qnil : Qerror, | |
4333 | exec_sentinel_error_handler); | |
4da2f5be RS |
4334 | |
4335 | /* If we saved the match data nonrecursively, restore it now. */ | |
7074fde6 | 4336 | restore_match_data (); |
4da2f5be | 4337 | running_asynch_code = outer_running_asynch_code; |
8fb3cf64 KH |
4338 | |
4339 | Vdeactivate_mark = odeactivate; | |
bbce7d72 RS |
4340 | |
4341 | /* Restore waiting_for_user_input_p as it was | |
4342 | when we were called, in case the filter clobbered it. */ | |
4343 | waiting_for_user_input_p = waiting; | |
4344 | ||
7973cfa8 | 4345 | #if 0 |
dfc21838 RS |
4346 | if (! EQ (Fcurrent_buffer (), obuffer) |
4347 | || ! EQ (current_buffer->keymap, okeymap)) | |
7973cfa8 | 4348 | #endif |
927e08be RS |
4349 | /* But do it only if the caller is actually going to read events. |
4350 | Otherwise there's no need to make him wake up, and it could | |
4351 | cause trouble (for example it would make Fsit_for return). */ | |
4352 | if (waiting_for_user_input_p == -1) | |
4353 | record_asynch_buffer_change (); | |
8fb3cf64 | 4354 | |
2ea6d561 | 4355 | unbind_to (count, Qnil); |
d0d6b7c5 JB |
4356 | } |
4357 | ||
4358 | /* Report all recent events of a change in process status | |
4359 | (either run the sentinel or output a message). | |
4360 | This is done while Emacs is waiting for keyboard input. */ | |
4361 | ||
6b53bb85 | 4362 | void |
d0d6b7c5 JB |
4363 | status_notify () |
4364 | { | |
4365 | register Lisp_Object proc, buffer; | |
2e4149a8 | 4366 | Lisp_Object tail, msg; |
d0d6b7c5 JB |
4367 | struct gcpro gcpro1, gcpro2; |
4368 | ||
2e4149a8 KH |
4369 | tail = Qnil; |
4370 | msg = Qnil; | |
d0d6b7c5 JB |
4371 | /* We need to gcpro tail; if read_process_output calls a filter |
4372 | which deletes a process and removes the cons to which tail points | |
4373 | from Vprocess_alist, and then causes a GC, tail is an unprotected | |
4374 | reference. */ | |
4375 | GCPRO2 (tail, msg); | |
4376 | ||
30623085 RS |
4377 | /* Set this now, so that if new processes are created by sentinels |
4378 | that we run, we get called again to handle their status changes. */ | |
4379 | update_tick = process_tick; | |
4380 | ||
4381 | for (tail = Vprocess_alist; !NILP (tail); tail = Fcdr (tail)) | |
d0d6b7c5 | 4382 | { |
30623085 RS |
4383 | Lisp_Object symbol; |
4384 | register struct Lisp_Process *p; | |
4385 | ||
4386 | proc = Fcdr (Fcar (tail)); | |
4387 | p = XPROCESS (proc); | |
4388 | ||
4389 | if (XINT (p->tick) != XINT (p->update_tick)) | |
d0d6b7c5 | 4390 | { |
30623085 | 4391 | XSETINT (p->update_tick, XINT (p->tick)); |
d0d6b7c5 | 4392 | |
30623085 | 4393 | /* If process is still active, read any output that remains. */ |
4da2f5be RS |
4394 | while (! EQ (p->filter, Qt) |
4395 | && XINT (p->infd) >= 0 | |
4396 | && read_process_output (proc, XINT (p->infd)) > 0); | |
d0d6b7c5 | 4397 | |
30623085 | 4398 | buffer = p->buffer; |
d0d6b7c5 | 4399 | |
30623085 RS |
4400 | /* Get the text to use for the message. */ |
4401 | if (!NILP (p->raw_status_low)) | |
4402 | update_status (p); | |
4403 | msg = status_message (p->status); | |
d0d6b7c5 | 4404 | |
30623085 RS |
4405 | /* If process is terminated, deactivate it or delete it. */ |
4406 | symbol = p->status; | |
4407 | if (CONSP (p->status)) | |
70949dac | 4408 | symbol = XCAR (p->status); |
d0d6b7c5 | 4409 | |
30623085 RS |
4410 | if (EQ (symbol, Qsignal) || EQ (symbol, Qexit) |
4411 | || EQ (symbol, Qclosed)) | |
4412 | { | |
4413 | if (delete_exited_processes) | |
4414 | remove_process (proc); | |
4415 | else | |
4416 | deactivate_process (proc); | |
4417 | } | |
d0d6b7c5 | 4418 | |
0ad61fe7 RS |
4419 | /* The actions above may have further incremented p->tick. |
4420 | So set p->update_tick again | |
4421 | so that an error in the sentinel will not cause | |
4422 | this code to be run again. */ | |
4423 | XSETINT (p->update_tick, XINT (p->tick)); | |
30623085 RS |
4424 | /* Now output the message suitably. */ |
4425 | if (!NILP (p->sentinel)) | |
4426 | exec_sentinel (proc, msg); | |
4427 | /* Don't bother with a message in the buffer | |
4428 | when a process becomes runnable. */ | |
4429 | else if (!EQ (symbol, Qrun) && !NILP (buffer)) | |
4430 | { | |
4431 | Lisp_Object ro, tem; | |
4432 | struct buffer *old = current_buffer; | |
d8a2934e RS |
4433 | int opoint, opoint_byte; |
4434 | int before, before_byte; | |
2e4149a8 | 4435 | |
30623085 | 4436 | ro = XBUFFER (buffer)->read_only; |
d0d6b7c5 | 4437 | |
30623085 RS |
4438 | /* Avoid error if buffer is deleted |
4439 | (probably that's why the process is dead, too) */ | |
4440 | if (NILP (XBUFFER (buffer)->name)) | |
4441 | continue; | |
4442 | Fset_buffer (buffer); | |
12ca5cdf | 4443 | |
6ec8bbd2 | 4444 | opoint = PT; |
d8a2934e | 4445 | opoint_byte = PT_BYTE; |
30623085 RS |
4446 | /* Insert new output into buffer |
4447 | at the current end-of-output marker, | |
4448 | thus preserving logical ordering of input and output. */ | |
4449 | if (XMARKER (p->mark)->buffer) | |
d8a2934e | 4450 | Fgoto_char (p->mark); |
30623085 | 4451 | else |
d8a2934e | 4452 | SET_PT_BOTH (ZV, ZV_BYTE); |
12ca5cdf RS |
4453 | |
4454 | before = PT; | |
d8a2934e | 4455 | before_byte = PT_BYTE; |
30623085 RS |
4456 | |
4457 | tem = current_buffer->read_only; | |
4458 | current_buffer->read_only = Qnil; | |
4459 | insert_string ("\nProcess "); | |
4460 | Finsert (1, &p->name); | |
4461 | insert_string (" "); | |
4462 | Finsert (1, &msg); | |
4463 | current_buffer->read_only = tem; | |
d8a2934e | 4464 | set_marker_both (p->mark, p->buffer, PT, PT_BYTE); |
30623085 | 4465 | |
12ca5cdf | 4466 | if (opoint >= before) |
d8a2934e RS |
4467 | SET_PT_BOTH (opoint + (PT - before), |
4468 | opoint_byte + (PT_BYTE - before_byte)); | |
12ca5cdf | 4469 | else |
d8a2934e | 4470 | SET_PT_BOTH (opoint, opoint_byte); |
12ca5cdf | 4471 | |
30623085 | 4472 | set_buffer_internal (old); |
d0d6b7c5 | 4473 | } |
30623085 RS |
4474 | } |
4475 | } /* end for */ | |
d0d6b7c5 JB |
4476 | |
4477 | update_mode_lines++; /* in case buffers use %s in mode-line-format */ | |
4478 | redisplay_preserve_echo_area (); | |
4479 | ||
d0d6b7c5 JB |
4480 | UNGCPRO; |
4481 | } | |
0fa1789e KH |
4482 | |
4483 | \f | |
4484 | DEFUN ("set-process-coding-system", Fset_process_coding_system, | |
4485 | Sset_process_coding_system, 1, 3, 0, | |
7744ca33 KH |
4486 | "Set coding systems of PROCESS to DECODING and ENCODING.\n\ |
4487 | DECODING will be used to decode subprocess output and ENCODING to\n\ | |
4488 | encode subprocess input.") | |
0fa1789e KH |
4489 | (proc, decoding, encoding) |
4490 | register Lisp_Object proc, decoding, encoding; | |
4491 | { | |
4492 | register struct Lisp_Process *p; | |
4493 | ||
4494 | CHECK_PROCESS (proc, 0); | |
4495 | p = XPROCESS (proc); | |
4496 | if (XINT (p->infd) < 0) | |
4497 | error ("Input file descriptor of %s closed", XSTRING (p->name)->data); | |
4498 | if (XINT (p->outfd) < 0) | |
4499 | error ("Output file descriptor of %s closed", XSTRING (p->name)->data); | |
4500 | ||
4501 | p->decode_coding_system = Fcheck_coding_system (decoding); | |
4502 | p->encode_coding_system = Fcheck_coding_system (encoding); | |
4503 | setup_coding_system (decoding, | |
c7580538 | 4504 | proc_decode_coding_system[XINT (p->infd)]); |
0fa1789e | 4505 | setup_coding_system (encoding, |
c7580538 | 4506 | proc_encode_coding_system[XINT (p->outfd)]); |
0fa1789e KH |
4507 | |
4508 | return Qnil; | |
4509 | } | |
4510 | ||
4511 | DEFUN ("process-coding-system", | |
4512 | Fprocess_coding_system, Sprocess_coding_system, 1, 1, 0, | |
a95c35f6 | 4513 | "Return a cons of coding systems for decoding and encoding of PROCESS.") |
0fa1789e KH |
4514 | (proc) |
4515 | register Lisp_Object proc; | |
4516 | { | |
4517 | CHECK_PROCESS (proc, 0); | |
4518 | return Fcons (XPROCESS (proc)->decode_coding_system, | |
4519 | XPROCESS (proc)->encode_coding_system); | |
4520 | } | |
d0d6b7c5 | 4521 | \f |
a69281ff RS |
4522 | /* The first time this is called, assume keyboard input comes from DESC |
4523 | instead of from where we used to expect it. | |
4524 | Subsequent calls mean assume input keyboard can come from DESC | |
4525 | in addition to other places. */ | |
4526 | ||
4527 | static int add_keyboard_wait_descriptor_called_flag; | |
4528 | ||
4529 | void | |
4530 | add_keyboard_wait_descriptor (desc) | |
4531 | int desc; | |
4532 | { | |
4533 | if (! add_keyboard_wait_descriptor_called_flag) | |
4534 | FD_CLR (0, &input_wait_mask); | |
4535 | add_keyboard_wait_descriptor_called_flag = 1; | |
4536 | FD_SET (desc, &input_wait_mask); | |
b5dc1c83 | 4537 | FD_SET (desc, &non_process_wait_mask); |
a69281ff RS |
4538 | if (desc > max_keyboard_desc) |
4539 | max_keyboard_desc = desc; | |
4540 | } | |
4541 | ||
4542 | /* From now on, do not expect DESC to give keyboard input. */ | |
4543 | ||
4544 | void | |
4545 | delete_keyboard_wait_descriptor (desc) | |
4546 | int desc; | |
4547 | { | |
4548 | int fd; | |
4549 | int lim = max_keyboard_desc; | |
4550 | ||
4551 | FD_CLR (desc, &input_wait_mask); | |
b5dc1c83 | 4552 | FD_CLR (desc, &non_process_wait_mask); |
a69281ff RS |
4553 | |
4554 | if (desc == max_keyboard_desc) | |
4555 | for (fd = 0; fd < lim; fd++) | |
4556 | if (FD_ISSET (fd, &input_wait_mask) | |
4557 | && !FD_ISSET (fd, &non_keyboard_wait_mask)) | |
4558 | max_keyboard_desc = fd; | |
4559 | } | |
4560 | ||
4561 | /* Return nonzero if *MASK has a bit set | |
4562 | that corresponds to one of the keyboard input descriptors. */ | |
4563 | ||
4564 | int | |
4565 | keyboard_bit_set (mask) | |
4566 | SELECT_TYPE *mask; | |
4567 | { | |
4568 | int fd; | |
4569 | ||
ee8e09af | 4570 | for (fd = 0; fd <= max_keyboard_desc; fd++) |
a69281ff RS |
4571 | if (FD_ISSET (fd, mask) && FD_ISSET (fd, &input_wait_mask) |
4572 | && !FD_ISSET (fd, &non_keyboard_wait_mask)) | |
4573 | return 1; | |
4574 | ||
4575 | return 0; | |
4576 | } | |
4577 | \f | |
dfcf069d | 4578 | void |
d0d6b7c5 JB |
4579 | init_process () |
4580 | { | |
4581 | register int i; | |
4582 | ||
4583 | #ifdef SIGCHLD | |
4584 | #ifndef CANNOT_DUMP | |
4585 | if (! noninteractive || initialized) | |
4586 | #endif | |
4587 | signal (SIGCHLD, sigchld_handler); | |
4588 | #endif | |
4589 | ||
4590 | FD_ZERO (&input_wait_mask); | |
a69281ff | 4591 | FD_ZERO (&non_keyboard_wait_mask); |
b5dc1c83 | 4592 | FD_ZERO (&non_process_wait_mask); |
7d0e672e | 4593 | max_process_desc = 0; |
dd2281ae | 4594 | |
a69281ff | 4595 | FD_SET (0, &input_wait_mask); |
dd2281ae | 4596 | |
d0d6b7c5 JB |
4597 | Vprocess_alist = Qnil; |
4598 | for (i = 0; i < MAXDESC; i++) | |
4599 | { | |
4600 | chan_process[i] = Qnil; | |
4601 | proc_buffered_char[i] = -1; | |
4602 | } | |
c7580538 KH |
4603 | bzero (proc_decode_coding_system, sizeof proc_decode_coding_system); |
4604 | bzero (proc_encode_coding_system, sizeof proc_encode_coding_system); | |
77c070f3 KH |
4605 | |
4606 | Vdefault_process_coding_system | |
4607 | = (NILP (buffer_defaults.enable_multibyte_characters) | |
4608 | ? Fcons (Qraw_text, Qnil) | |
4609 | : Fcons (Qemacs_mule, Qnil)); | |
d0d6b7c5 | 4610 | } |
312c9964 | 4611 | |
dfcf069d | 4612 | void |
d0d6b7c5 JB |
4613 | syms_of_process () |
4614 | { | |
d0d6b7c5 JB |
4615 | Qprocessp = intern ("processp"); |
4616 | staticpro (&Qprocessp); | |
4617 | Qrun = intern ("run"); | |
4618 | staticpro (&Qrun); | |
4619 | Qstop = intern ("stop"); | |
4620 | staticpro (&Qstop); | |
4621 | Qsignal = intern ("signal"); | |
4622 | staticpro (&Qsignal); | |
4623 | ||
4624 | /* Qexit is already staticpro'd by syms_of_eval; don't staticpro it | |
4625 | here again. | |
4626 | ||
4627 | Qexit = intern ("exit"); | |
4628 | staticpro (&Qexit); */ | |
4629 | ||
4630 | Qopen = intern ("open"); | |
4631 | staticpro (&Qopen); | |
4632 | Qclosed = intern ("closed"); | |
4633 | staticpro (&Qclosed); | |
4634 | ||
6545aada RS |
4635 | Qlast_nonmenu_event = intern ("last-nonmenu-event"); |
4636 | staticpro (&Qlast_nonmenu_event); | |
4637 | ||
d0d6b7c5 JB |
4638 | staticpro (&Vprocess_alist); |
4639 | ||
4640 | DEFVAR_BOOL ("delete-exited-processes", &delete_exited_processes, | |
4641 | "*Non-nil means delete processes immediately when they exit.\n\ | |
4642 | nil means don't delete them until `list-processes' is run."); | |
4643 | ||
4644 | delete_exited_processes = 1; | |
4645 | ||
4646 | DEFVAR_LISP ("process-connection-type", &Vprocess_connection_type, | |
4647 | "Control type of device used to communicate with subprocesses.\n\ | |
e333e864 RS |
4648 | Values are nil to use a pipe, or t or `pty' to use a pty.\n\ |
4649 | The value has no effect if the system has no ptys or if all ptys are busy:\n\ | |
4650 | then a pipe is used in any case.\n\ | |
4651 | The value takes effect when `start-process' is called."); | |
d0d6b7c5 JB |
4652 | Vprocess_connection_type = Qt; |
4653 | ||
4654 | defsubr (&Sprocessp); | |
4655 | defsubr (&Sget_process); | |
4656 | defsubr (&Sget_buffer_process); | |
4657 | defsubr (&Sdelete_process); | |
4658 | defsubr (&Sprocess_status); | |
4659 | defsubr (&Sprocess_exit_status); | |
4660 | defsubr (&Sprocess_id); | |
4661 | defsubr (&Sprocess_name); | |
3b9a3dfa | 4662 | defsubr (&Sprocess_tty_name); |
d0d6b7c5 JB |
4663 | defsubr (&Sprocess_command); |
4664 | defsubr (&Sset_process_buffer); | |
4665 | defsubr (&Sprocess_buffer); | |
4666 | defsubr (&Sprocess_mark); | |
4667 | defsubr (&Sset_process_filter); | |
4668 | defsubr (&Sprocess_filter); | |
4669 | defsubr (&Sset_process_sentinel); | |
4670 | defsubr (&Sprocess_sentinel); | |
de282a05 | 4671 | defsubr (&Sset_process_window_size); |
52a1b894 EZ |
4672 | defsubr (&Sset_process_inherit_coding_system_flag); |
4673 | defsubr (&Sprocess_inherit_coding_system_flag); | |
d0d6b7c5 | 4674 | defsubr (&Sprocess_kill_without_query); |
de282a05 | 4675 | defsubr (&Sprocess_contact); |
d0d6b7c5 JB |
4676 | defsubr (&Slist_processes); |
4677 | defsubr (&Sprocess_list); | |
4678 | defsubr (&Sstart_process); | |
4679 | #ifdef HAVE_SOCKETS | |
4680 | defsubr (&Sopen_network_stream); | |
4681 | #endif /* HAVE_SOCKETS */ | |
4682 | defsubr (&Saccept_process_output); | |
4683 | defsubr (&Sprocess_send_region); | |
4684 | defsubr (&Sprocess_send_string); | |
4685 | defsubr (&Sinterrupt_process); | |
4686 | defsubr (&Skill_process); | |
4687 | defsubr (&Squit_process); | |
4688 | defsubr (&Sstop_process); | |
4689 | defsubr (&Scontinue_process); | |
b81ea5ef | 4690 | defsubr (&Sprocess_running_child_p); |
d0d6b7c5 JB |
4691 | defsubr (&Sprocess_send_eof); |
4692 | defsubr (&Ssignal_process); | |
4693 | defsubr (&Swaiting_for_user_input_p); | |
4694 | /* defsubr (&Sprocess_connection); */ | |
0fa1789e KH |
4695 | defsubr (&Sset_process_coding_system); |
4696 | defsubr (&Sprocess_coding_system); | |
d0d6b7c5 JB |
4697 | } |
4698 | ||
6720a7fb JB |
4699 | \f |
4700 | #else /* not subprocesses */ | |
4701 | ||
4702 | #include <sys/types.h> | |
4703 | #include <errno.h> | |
4704 | ||
4705 | #include "lisp.h" | |
4706 | #include "systime.h" | |
52a1b894 EZ |
4707 | #include "charset.h" |
4708 | #include "coding.h" | |
6720a7fb | 4709 | #include "termopts.h" |
81afb6d1 | 4710 | #include "sysselect.h" |
6720a7fb | 4711 | |
ff11dfa1 | 4712 | extern int frame_garbaged; |
6720a7fb | 4713 | |
f694e5d2 KH |
4714 | extern EMACS_TIME timer_check (); |
4715 | extern int timers_run; | |
6720a7fb JB |
4716 | |
4717 | /* As described above, except assuming that there are no subprocesses: | |
4718 | ||
4719 | Wait for timeout to elapse and/or keyboard input to be available. | |
4720 | ||
4721 | time_limit is: | |
4722 | timeout in seconds, or | |
4723 | zero for no limit, or | |
4724 | -1 means gobble data immediately available but don't wait for any. | |
4725 | ||
f76475ad | 4726 | read_kbd is a Lisp_Object: |
6720a7fb JB |
4727 | 0 to ignore keyboard input, or |
4728 | 1 to return when input is available, or | |
4729 | -1 means caller will actually read the input, so don't throw to | |
4730 | the quit handler. | |
0a65b032 RS |
4731 | a cons cell, meaning wait until its car is non-nil |
4732 | (and gobble terminal input into the buffer if any arrives), or | |
6720a7fb JB |
4733 | We know that read_kbd will never be a Lisp_Process, since |
4734 | `subprocesses' isn't defined. | |
4735 | ||
4736 | do_display != 0 means redisplay should be done to show subprocess | |
5164ee8e | 4737 | output that arrives. |
6720a7fb | 4738 | |
eb8c3be9 | 4739 | Return true iff we received input from any process. */ |
6720a7fb JB |
4740 | |
4741 | int | |
4742 | wait_reading_process_input (time_limit, microsecs, read_kbd, do_display) | |
f76475ad JB |
4743 | int time_limit, microsecs; |
4744 | Lisp_Object read_kbd; | |
4745 | int do_display; | |
6720a7fb | 4746 | { |
52fd88d3 | 4747 | register int nfds; |
f694e5d2 | 4748 | EMACS_TIME end_time, timeout; |
8db121c4 | 4749 | SELECT_TYPE waitchannels; |
f694e5d2 | 4750 | int xerrno; |
0a65b032 RS |
4751 | Lisp_Object *wait_for_cell = 0; |
4752 | ||
4753 | /* If waiting for non-nil in a cell, record where. */ | |
4754 | if (CONSP (read_kbd)) | |
4755 | { | |
70949dac | 4756 | wait_for_cell = &XCAR (read_kbd); |
0a65b032 RS |
4757 | XSETFASTINT (read_kbd, 0); |
4758 | } | |
6720a7fb JB |
4759 | |
4760 | /* What does time_limit really mean? */ | |
4761 | if (time_limit || microsecs) | |
4762 | { | |
6720a7fb | 4763 | EMACS_GET_TIME (end_time); |
52fd88d3 | 4764 | EMACS_SET_SECS_USECS (timeout, time_limit, microsecs); |
6720a7fb JB |
4765 | EMACS_ADD_TIME (end_time, end_time, timeout); |
4766 | } | |
6720a7fb JB |
4767 | |
4768 | /* Turn off periodic alarms (in case they are in use) | |
4769 | because the select emulator uses alarms. */ | |
30904ab7 | 4770 | turn_on_atimers (0); |
6720a7fb | 4771 | |
52fd88d3 | 4772 | while (1) |
6720a7fb | 4773 | { |
bae8d137 | 4774 | int timeout_reduced_for_timers = 0; |
6720a7fb | 4775 | |
6720a7fb JB |
4776 | /* If calling from keyboard input, do not quit |
4777 | since we want to return C-g as an input character. | |
4778 | Otherwise, do pending quit if requested. */ | |
f76475ad | 4779 | if (XINT (read_kbd) >= 0) |
6720a7fb JB |
4780 | QUIT; |
4781 | ||
0a65b032 RS |
4782 | /* Exit now if the cell we're waiting for became non-nil. */ |
4783 | if (wait_for_cell && ! NILP (*wait_for_cell)) | |
4784 | break; | |
4785 | ||
bae8d137 RS |
4786 | /* Compute time from now till when time limit is up */ |
4787 | /* Exit if already run out */ | |
52fd88d3 EZ |
4788 | if (time_limit == -1) |
4789 | { | |
4790 | /* -1 specified for timeout means | |
4791 | gobble output available now | |
4792 | but don't wait at all. */ | |
4793 | ||
4794 | EMACS_SET_SECS_USECS (timeout, 0, 0); | |
4795 | } | |
4796 | else if (time_limit || microsecs) | |
6720a7fb | 4797 | { |
f694e5d2 KH |
4798 | EMACS_GET_TIME (timeout); |
4799 | EMACS_SUB_TIME (timeout, end_time, timeout); | |
4800 | if (EMACS_TIME_NEG_P (timeout)) | |
6720a7fb JB |
4801 | break; |
4802 | } | |
52fd88d3 EZ |
4803 | else |
4804 | { | |
4805 | EMACS_SET_SECS_USECS (timeout, 100000, 0); | |
4806 | } | |
6720a7fb | 4807 | |
bae8d137 RS |
4808 | /* If our caller will not immediately handle keyboard events, |
4809 | run timer events directly. | |
4810 | (Callers that will immediately read keyboard events | |
4811 | call timer_delay on their own.) */ | |
f854a00b | 4812 | if (! wait_for_cell) |
bae8d137 RS |
4813 | { |
4814 | EMACS_TIME timer_delay; | |
0a65b032 RS |
4815 | int old_timers_run; |
4816 | ||
4817 | retry: | |
4818 | old_timers_run = timers_run; | |
bae8d137 RS |
4819 | timer_delay = timer_check (1); |
4820 | if (timers_run != old_timers_run && do_display) | |
0a65b032 RS |
4821 | { |
4822 | redisplay_preserve_echo_area (); | |
4823 | /* We must retry, since a timer may have requeued itself | |
4824 | and that could alter the time delay. */ | |
4825 | goto retry; | |
4826 | } | |
4827 | ||
52fd88d3 EZ |
4828 | /* If there is unread keyboard input, also return. */ |
4829 | if (XINT (read_kbd) != 0 | |
4830 | && requeued_events_pending_p ()) | |
4831 | break; | |
4832 | ||
f694e5d2 | 4833 | if (! EMACS_TIME_NEG_P (timer_delay) && time_limit != -1) |
bae8d137 RS |
4834 | { |
4835 | EMACS_TIME difference; | |
f694e5d2 | 4836 | EMACS_SUB_TIME (difference, timer_delay, timeout); |
bae8d137 RS |
4837 | if (EMACS_TIME_NEG_P (difference)) |
4838 | { | |
f694e5d2 | 4839 | timeout = timer_delay; |
bae8d137 RS |
4840 | timeout_reduced_for_timers = 1; |
4841 | } | |
4842 | } | |
4843 | } | |
4844 | ||
6720a7fb JB |
4845 | /* Cause C-g and alarm signals to take immediate action, |
4846 | and cause input available signals to zero out timeout. */ | |
f76475ad | 4847 | if (XINT (read_kbd) < 0) |
6720a7fb JB |
4848 | set_waiting_for_input (&timeout); |
4849 | ||
0a65b032 RS |
4850 | /* Wait till there is something to do. */ |
4851 | ||
4852 | if (! XINT (read_kbd) && wait_for_cell == 0) | |
4853 | FD_ZERO (&waitchannels); | |
4854 | else | |
4855 | FD_SET (0, &waitchannels); | |
4856 | ||
ff11dfa1 | 4857 | /* If a frame has been newly mapped and needs updating, |
6720a7fb | 4858 | reprocess its display stuff. */ |
5164ee8e | 4859 | if (frame_garbaged && do_display) |
0a65b032 RS |
4860 | { |
4861 | clear_waiting_for_input (); | |
4862 | redisplay_preserve_echo_area (); | |
4863 | if (XINT (read_kbd) < 0) | |
4864 | set_waiting_for_input (&timeout); | |
4865 | } | |
6720a7fb | 4866 | |
1861b214 RS |
4867 | if (XINT (read_kbd) && detect_input_pending ()) |
4868 | { | |
4869 | nfds = 0; | |
4870 | FD_ZERO (&waitchannels); | |
4871 | } | |
4872 | else | |
4873 | nfds = select (1, &waitchannels, (SELECT_TYPE *)0, (SELECT_TYPE *)0, | |
4874 | &timeout); | |
f694e5d2 KH |
4875 | |
4876 | xerrno = errno; | |
6720a7fb JB |
4877 | |
4878 | /* Make C-g and alarm signals set flags again */ | |
4879 | clear_waiting_for_input (); | |
4880 | ||
4881 | /* If we woke up due to SIGWINCH, actually change size now. */ | |
2b653806 | 4882 | do_pending_window_change (0); |
6720a7fb | 4883 | |
f694e5d2 KH |
4884 | if (time_limit && nfds == 0 && ! timeout_reduced_for_timers) |
4885 | /* We waited the full specified time, so return now. */ | |
4886 | break; | |
4887 | ||
6720a7fb JB |
4888 | if (nfds == -1) |
4889 | { | |
4890 | /* If the system call was interrupted, then go around the | |
4891 | loop again. */ | |
f694e5d2 | 4892 | if (xerrno == EINTR) |
8db121c4 | 4893 | FD_ZERO (&waitchannels); |
f694e5d2 | 4894 | else |
68c45bf0 | 4895 | error ("select error: %s", emacs_strerror (xerrno)); |
6720a7fb JB |
4896 | } |
4897 | #ifdef sun | |
4898 | else if (nfds > 0 && (waitchannels & 1) && interrupt_input) | |
4899 | /* System sometimes fails to deliver SIGIO. */ | |
4900 | kill (getpid (), SIGIO); | |
4901 | #endif | |
7324d660 | 4902 | #ifdef SIGIO |
f76475ad | 4903 | if (XINT (read_kbd) && interrupt_input && (waitchannels & 1)) |
e643c5be | 4904 | kill (getpid (), SIGIO); |
7324d660 | 4905 | #endif |
6720a7fb | 4906 | |
f694e5d2 KH |
4907 | /* Check for keyboard input */ |
4908 | ||
f854a00b | 4909 | if ((XINT (read_kbd) != 0) |
f694e5d2 KH |
4910 | && detect_input_pending_run_timers (do_display)) |
4911 | { | |
4912 | swallow_events (do_display); | |
4913 | if (detect_input_pending_run_timers (do_display)) | |
4914 | break; | |
4915 | } | |
0a65b032 | 4916 | |
52fd88d3 EZ |
4917 | /* If there is unread keyboard input, also return. */ |
4918 | if (XINT (read_kbd) != 0 | |
4919 | && requeued_events_pending_p ()) | |
4920 | break; | |
4921 | ||
f854a00b RS |
4922 | /* If wait_for_cell. check for keyboard input |
4923 | but don't run any timers. | |
4924 | ??? (It seems wrong to me to check for keyboard | |
4925 | input at all when wait_for_cell, but the code | |
4926 | has been this way since July 1994. | |
4927 | Try changing this after version 19.31.) */ | |
4928 | if (wait_for_cell | |
4929 | && detect_input_pending ()) | |
4930 | { | |
4931 | swallow_events (do_display); | |
4932 | if (detect_input_pending ()) | |
4933 | break; | |
4934 | } | |
4935 | ||
0a65b032 RS |
4936 | /* Exit now if the cell we're waiting for became non-nil. */ |
4937 | if (wait_for_cell && ! NILP (*wait_for_cell)) | |
4938 | break; | |
6720a7fb JB |
4939 | } |
4940 | ||
a87b802f JB |
4941 | start_polling (); |
4942 | ||
6720a7fb JB |
4943 | return 0; |
4944 | } | |
4945 | ||
4946 | ||
4947 | DEFUN ("get-buffer-process", Fget_buffer_process, Sget_buffer_process, 1, 1, 0, | |
51ab806a | 4948 | /* Don't confuse make-docfile by having two doc strings for this function. |
312c9964 RS |
4949 | make-docfile does not pay attention to #if, for good reason! */ |
4950 | 0) | |
6720a7fb JB |
4951 | (name) |
4952 | register Lisp_Object name; | |
4953 | { | |
4954 | return Qnil; | |
4955 | } | |
4956 | ||
52a1b894 EZ |
4957 | DEFUN ("process-inherit-coding-system-flag", |
4958 | Fprocess_inherit_coding_system_flag, Sprocess_inherit_coding_system_flag, | |
4959 | 1, 1, 0, | |
4960 | /* Don't confuse make-docfile by having two doc strings for this function. | |
4961 | make-docfile does not pay attention to #if, for good reason! */ | |
4962 | 0) | |
4963 | (process) | |
4964 | register Lisp_Object process; | |
4965 | { | |
4966 | /* Ignore the argument and return the value of | |
4967 | inherit-process-coding-system. */ | |
4968 | return inherit_process_coding_system ? Qt : Qnil; | |
4969 | } | |
4970 | ||
6720a7fb JB |
4971 | /* Kill all processes associated with `buffer'. |
4972 | If `buffer' is nil, kill all processes. | |
4973 | Since we have no subprocesses, this does nothing. */ | |
4974 | ||
d9bb0c32 | 4975 | void |
6720a7fb JB |
4976 | kill_buffer_processes (buffer) |
4977 | Lisp_Object buffer; | |
4978 | { | |
4979 | } | |
4980 | ||
02b9b4fd | 4981 | void |
6720a7fb JB |
4982 | init_process () |
4983 | { | |
4984 | } | |
4985 | ||
02b9b4fd | 4986 | void |
6720a7fb JB |
4987 | syms_of_process () |
4988 | { | |
4989 | defsubr (&Sget_buffer_process); | |
52a1b894 | 4990 | defsubr (&Sprocess_inherit_coding_system_flag); |
6720a7fb JB |
4991 | } |
4992 | ||
4993 | \f | |
4994 | #endif /* not subprocesses */ |