Commit | Line | Data |
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d0d6b7c5 | 1 | /* Asynchronous subprocess control for GNU Emacs. |
4a2f9c6a | 2 | Copyright (C) 1985, 86, 87, 88, 93, 94, 95, 96, 1998 |
03832893 | 3 | Free Software Foundation, Inc. |
d0d6b7c5 JB |
4 | |
5 | This file is part of GNU Emacs. | |
6 | ||
7 | GNU Emacs is free software; you can redistribute it and/or modify | |
8 | it under the terms of the GNU General Public License as published by | |
1dc77cc3 | 9 | the Free Software Foundation; either version 2, or (at your option) |
d0d6b7c5 JB |
10 | any later version. |
11 | ||
12 | GNU Emacs is distributed in the hope that it will be useful, | |
13 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
15 | GNU General Public License for more details. | |
16 | ||
17 | You should have received a copy of the GNU General Public License | |
18 | along with GNU Emacs; see the file COPYING. If not, write to | |
3b7ad313 EN |
19 | the Free Software Foundation, Inc., 59 Temple Place - Suite 330, |
20 | Boston, MA 02111-1307, USA. */ | |
d0d6b7c5 JB |
21 | |
22 | ||
23 | #include <signal.h> | |
24 | ||
18160b98 | 25 | #include <config.h> |
d0d6b7c5 | 26 | |
6720a7fb JB |
27 | /* This file is split into two parts by the following preprocessor |
28 | conditional. The 'then' clause contains all of the support for | |
29 | asynchronous subprocesses. The 'else' clause contains stub | |
30 | versions of some of the asynchronous subprocess routines that are | |
31 | often called elsewhere in Emacs, so we don't have to #ifdef the | |
32 | sections that call them. */ | |
33 | ||
34 | \f | |
d0d6b7c5 | 35 | #ifdef subprocesses |
d0d6b7c5 JB |
36 | |
37 | #include <stdio.h> | |
38 | #include <errno.h> | |
39 | #include <setjmp.h> | |
40 | #include <sys/types.h> /* some typedefs are used in sys/file.h */ | |
41 | #include <sys/file.h> | |
42 | #include <sys/stat.h> | |
93b4f699 RS |
43 | #ifdef HAVE_UNISTD_H |
44 | #include <unistd.h> | |
45 | #endif | |
d0d6b7c5 | 46 | |
e98d950b RS |
47 | #ifdef WINDOWSNT |
48 | #include <stdlib.h> | |
49 | #include <fcntl.h> | |
50 | #endif /* not WINDOWSNT */ | |
51 | ||
d0d6b7c5 JB |
52 | #ifdef HAVE_SOCKETS /* TCP connection support, if kernel can do it */ |
53 | #include <sys/socket.h> | |
54 | #include <netdb.h> | |
55 | #include <netinet/in.h> | |
56 | #include <arpa/inet.h> | |
f2cfa9a6 RS |
57 | #ifdef NEED_NET_ERRNO_H |
58 | #include <net/errno.h> | |
59 | #endif /* NEED_NET_ERRNO_H */ | |
d0d6b7c5 JB |
60 | #endif /* HAVE_SOCKETS */ |
61 | ||
1d2c16fa RS |
62 | /* TERM is a poor-man's SLIP, used on Linux. */ |
63 | #ifdef TERM | |
64 | #include <client.h> | |
65 | #endif | |
66 | ||
cf32fea0 PR |
67 | /* On some systems, e.g. DGUX, inet_addr returns a 'struct in_addr'. */ |
68 | #ifdef HAVE_BROKEN_INET_ADDR | |
79967d5e RS |
69 | #define IN_ADDR struct in_addr |
70 | #define NUMERIC_ADDR_ERROR (numeric_addr.s_addr == -1) | |
71 | #else | |
72 | #define IN_ADDR unsigned long | |
73 | #define NUMERIC_ADDR_ERROR (numeric_addr == -1) | |
74 | #endif | |
75 | ||
6df54671 | 76 | #if defined(BSD_SYSTEM) || defined(STRIDE) |
d0d6b7c5 | 77 | #include <sys/ioctl.h> |
0ad77c54 | 78 | #if !defined (O_NDELAY) && defined (HAVE_PTYS) && !defined(USG5) |
d0d6b7c5 JB |
79 | #include <fcntl.h> |
80 | #endif /* HAVE_PTYS and no O_NDELAY */ | |
6df54671 | 81 | #endif /* BSD_SYSTEM || STRIDE */ |
d0d6b7c5 | 82 | |
99e3d726 RS |
83 | #ifdef BROKEN_O_NONBLOCK |
84 | #undef O_NONBLOCK | |
85 | #endif /* BROKEN_O_NONBLOCK */ | |
86 | ||
d0d6b7c5 JB |
87 | #ifdef NEED_BSDTTY |
88 | #include <bsdtty.h> | |
89 | #endif | |
90 | ||
d0d6b7c5 JB |
91 | #ifdef IRIS |
92 | #include <sys/sysmacros.h> /* for "minor" */ | |
93 | #endif /* not IRIS */ | |
94 | ||
95 | #include "systime.h" | |
36ebaafa | 96 | #include "systty.h" |
d0d6b7c5 JB |
97 | |
98 | #include "lisp.h" | |
99 | #include "window.h" | |
100 | #include "buffer.h" | |
0fa1789e KH |
101 | #include "charset.h" |
102 | #include "coding.h" | |
d0d6b7c5 JB |
103 | #include "process.h" |
104 | #include "termhooks.h" | |
105 | #include "termopts.h" | |
106 | #include "commands.h" | |
1dc77cc3 | 107 | #include "frame.h" |
ececcbec | 108 | #include "blockinput.h" |
dfcf069d AS |
109 | #include "keyboard.h" |
110 | #include "dispextern.h" | |
d0d6b7c5 | 111 | |
0c9960e9 RS |
112 | #define max(a, b) ((a) > (b) ? (a) : (b)) |
113 | ||
dd2281ae | 114 | Lisp_Object Qprocessp; |
d0d6b7c5 | 115 | Lisp_Object Qrun, Qstop, Qsignal, Qopen, Qclosed; |
6545aada | 116 | Lisp_Object Qlast_nonmenu_event; |
d0d6b7c5 JB |
117 | /* Qexit is declared and initialized in eval.c. */ |
118 | ||
119 | /* a process object is a network connection when its childp field is neither | |
de282a05 | 120 | Qt nor Qnil but is instead a cons cell (HOSTNAME PORTNUM). */ |
d0d6b7c5 JB |
121 | |
122 | #ifdef HAVE_SOCKETS | |
de282a05 | 123 | #define NETCONN_P(p) (GC_CONSP (XPROCESS (p)->childp)) |
d0d6b7c5 JB |
124 | #else |
125 | #define NETCONN_P(p) 0 | |
126 | #endif /* HAVE_SOCKETS */ | |
127 | ||
128 | /* Define first descriptor number available for subprocesses. */ | |
129 | #ifdef VMS | |
130 | #define FIRST_PROC_DESC 1 | |
131 | #else /* Not VMS */ | |
132 | #define FIRST_PROC_DESC 3 | |
133 | #endif | |
134 | ||
135 | /* Define SIGCHLD as an alias for SIGCLD. There are many conditionals | |
136 | testing SIGCHLD. */ | |
137 | ||
138 | #if !defined (SIGCHLD) && defined (SIGCLD) | |
139 | #define SIGCHLD SIGCLD | |
140 | #endif /* SIGCLD */ | |
141 | ||
142 | #include "syssignal.h" | |
143 | ||
889255b4 | 144 | #include "syswait.h" |
d0d6b7c5 | 145 | |
41d03b9a GM |
146 | extern void set_waiting_for_input P_ ((EMACS_TIME *)); |
147 | ||
b062d1fe RM |
148 | extern int errno; |
149 | extern char *strerror (); | |
150 | #ifdef VMS | |
d0d6b7c5 | 151 | extern char *sys_errlist[]; |
b062d1fe | 152 | #endif |
d0d6b7c5 | 153 | |
5f0929a7 RS |
154 | #ifndef HAVE_H_ERRNO |
155 | extern int h_errno; | |
156 | #endif | |
157 | ||
a86928f7 | 158 | #ifndef SYS_SIGLIST_DECLARED |
d0d6b7c5 JB |
159 | #ifndef VMS |
160 | #ifndef BSD4_1 | |
e98d950b | 161 | #ifndef WINDOWSNT |
084fd64a | 162 | #ifndef LINUX |
d0d6b7c5 | 163 | extern char *sys_siglist[]; |
a0e4d3f3 RS |
164 | #endif /* not LINUX */ |
165 | #else /* BSD4_1 */ | |
d0d6b7c5 JB |
166 | char *sys_siglist[] = |
167 | { | |
168 | "bum signal!!", | |
169 | "hangup", | |
170 | "interrupt", | |
171 | "quit", | |
172 | "illegal instruction", | |
173 | "trace trap", | |
174 | "iot instruction", | |
175 | "emt instruction", | |
176 | "floating point exception", | |
177 | "kill", | |
178 | "bus error", | |
179 | "segmentation violation", | |
180 | "bad argument to system call", | |
181 | "write on a pipe with no one to read it", | |
182 | "alarm clock", | |
183 | "software termination signal from kill", | |
184 | "status signal", | |
185 | "sendable stop signal not from tty", | |
186 | "stop signal from tty", | |
187 | "continue a stopped process", | |
188 | "child status has changed", | |
189 | "background read attempted from control tty", | |
190 | "background write attempted from control tty", | |
191 | "input record available at control tty", | |
192 | "exceeded CPU time limit", | |
193 | "exceeded file size limit" | |
194 | }; | |
e98d950b | 195 | #endif /* not WINDOWSNT */ |
d0d6b7c5 JB |
196 | #endif |
197 | #endif /* VMS */ | |
a86928f7 | 198 | #endif /* ! SYS_SIGLIST_DECLARED */ |
d0d6b7c5 | 199 | |
d0d6b7c5 JB |
200 | /* t means use pty, nil means use a pipe, |
201 | maybe other values to come. */ | |
dd2281ae | 202 | static Lisp_Object Vprocess_connection_type; |
d0d6b7c5 JB |
203 | |
204 | #ifdef SKTPAIR | |
205 | #ifndef HAVE_SOCKETS | |
206 | #include <sys/socket.h> | |
207 | #endif | |
208 | #endif /* SKTPAIR */ | |
209 | ||
17d02632 KH |
210 | /* These next two vars are non-static since sysdep.c uses them in the |
211 | emulation of `select'. */ | |
d0d6b7c5 | 212 | /* Number of events of change of status of a process. */ |
17d02632 | 213 | int process_tick; |
d0d6b7c5 | 214 | /* Number of events for which the user or sentinel has been notified. */ |
17d02632 | 215 | int update_tick; |
d0d6b7c5 | 216 | |
5886acf9 | 217 | #include "sysselect.h" |
d0d6b7c5 | 218 | |
41d03b9a GM |
219 | extern int keyboard_bit_set P_ ((SELECT_TYPE *)); |
220 | ||
583dcae4 | 221 | /* If we support a window system, turn on the code to poll periodically |
44ade2e9 | 222 | to detect C-g. It isn't actually used when doing interrupt input. */ |
583dcae4 | 223 | #ifdef HAVE_WINDOW_SYSTEM |
44ade2e9 RS |
224 | #define POLL_FOR_INPUT |
225 | #endif | |
226 | ||
a69281ff | 227 | /* Mask of bits indicating the descriptors that we wait for input on. */ |
d0d6b7c5 | 228 | |
dd2281ae RS |
229 | static SELECT_TYPE input_wait_mask; |
230 | ||
a69281ff RS |
231 | /* Mask that excludes keyboard input descriptor (s). */ |
232 | ||
233 | static SELECT_TYPE non_keyboard_wait_mask; | |
234 | ||
b5dc1c83 RS |
235 | /* Mask that excludes process input descriptor (s). */ |
236 | ||
237 | static SELECT_TYPE non_process_wait_mask; | |
238 | ||
7d0e672e RS |
239 | /* The largest descriptor currently in use for a process object. */ |
240 | static int max_process_desc; | |
241 | ||
a69281ff RS |
242 | /* The largest descriptor currently in use for keyboard input. */ |
243 | static int max_keyboard_desc; | |
d0d6b7c5 | 244 | |
dd2281ae RS |
245 | /* Nonzero means delete a process right away if it exits. */ |
246 | static int delete_exited_processes; | |
d0d6b7c5 JB |
247 | |
248 | /* Indexed by descriptor, gives the process (if any) for that descriptor */ | |
41f3aa98 | 249 | Lisp_Object chan_process[MAXDESC]; |
d0d6b7c5 JB |
250 | |
251 | /* Alist of elements (NAME . PROCESS) */ | |
41f3aa98 | 252 | Lisp_Object Vprocess_alist; |
d0d6b7c5 JB |
253 | |
254 | /* Buffered-ahead input char from process, indexed by channel. | |
255 | -1 means empty (no char is buffered). | |
256 | Used on sys V where the only way to tell if there is any | |
257 | output from the process is to read at least one char. | |
258 | Always -1 on systems that support FIONREAD. */ | |
259 | ||
e98d950b RS |
260 | /* Don't make static; need to access externally. */ |
261 | int proc_buffered_char[MAXDESC]; | |
dd2281ae | 262 | |
0fa1789e | 263 | /* Table of `struct coding-system' for each process. */ |
c7580538 KH |
264 | static struct coding_system *proc_decode_coding_system[MAXDESC]; |
265 | static struct coding_system *proc_encode_coding_system[MAXDESC]; | |
0fa1789e | 266 | |
dd2281ae | 267 | static Lisp_Object get_process (); |
93b4f699 | 268 | |
fb4c3627 | 269 | extern EMACS_TIME timer_check (); |
5de50bfb | 270 | extern int timers_run; |
fb4c3627 | 271 | |
93b4f699 RS |
272 | /* Maximum number of bytes to send to a pty without an eof. */ |
273 | static int pty_max_bytes; | |
3b9a3dfa | 274 | |
14dc6093 | 275 | extern Lisp_Object Vfile_name_coding_system, Vdefault_file_name_coding_system; |
a932f187 | 276 | |
875e6b94 KH |
277 | #ifdef HAVE_PTYS |
278 | /* The file name of the pty opened by allocate_pty. */ | |
3b9a3dfa RS |
279 | |
280 | static char pty_name[24]; | |
875e6b94 | 281 | #endif |
d0d6b7c5 JB |
282 | \f |
283 | /* Compute the Lisp form of the process status, p->status, from | |
284 | the numeric status that was returned by `wait'. */ | |
285 | ||
f9738840 JB |
286 | Lisp_Object status_convert (); |
287 | ||
dfcf069d | 288 | void |
d0d6b7c5 JB |
289 | update_status (p) |
290 | struct Lisp_Process *p; | |
291 | { | |
292 | union { int i; WAITTYPE wt; } u; | |
293 | u.i = XFASTINT (p->raw_status_low) + (XFASTINT (p->raw_status_high) << 16); | |
294 | p->status = status_convert (u.wt); | |
295 | p->raw_status_low = Qnil; | |
296 | p->raw_status_high = Qnil; | |
297 | } | |
298 | ||
91d10fa8 | 299 | /* Convert a process status word in Unix format to |
d0d6b7c5 JB |
300 | the list that we use internally. */ |
301 | ||
302 | Lisp_Object | |
303 | status_convert (w) | |
304 | WAITTYPE w; | |
305 | { | |
306 | if (WIFSTOPPED (w)) | |
307 | return Fcons (Qstop, Fcons (make_number (WSTOPSIG (w)), Qnil)); | |
308 | else if (WIFEXITED (w)) | |
309 | return Fcons (Qexit, Fcons (make_number (WRETCODE (w)), | |
310 | WCOREDUMP (w) ? Qt : Qnil)); | |
311 | else if (WIFSIGNALED (w)) | |
312 | return Fcons (Qsignal, Fcons (make_number (WTERMSIG (w)), | |
313 | WCOREDUMP (w) ? Qt : Qnil)); | |
314 | else | |
315 | return Qrun; | |
316 | } | |
317 | ||
318 | /* Given a status-list, extract the three pieces of information | |
319 | and store them individually through the three pointers. */ | |
320 | ||
321 | void | |
322 | decode_status (l, symbol, code, coredump) | |
323 | Lisp_Object l; | |
324 | Lisp_Object *symbol; | |
325 | int *code; | |
326 | int *coredump; | |
327 | { | |
328 | Lisp_Object tem; | |
329 | ||
bcd69aea | 330 | if (SYMBOLP (l)) |
d0d6b7c5 JB |
331 | { |
332 | *symbol = l; | |
333 | *code = 0; | |
334 | *coredump = 0; | |
335 | } | |
336 | else | |
337 | { | |
70949dac KR |
338 | *symbol = XCAR (l); |
339 | tem = XCDR (l); | |
340 | *code = XFASTINT (XCAR (tem)); | |
341 | tem = XCDR (tem); | |
d0d6b7c5 JB |
342 | *coredump = !NILP (tem); |
343 | } | |
344 | } | |
345 | ||
346 | /* Return a string describing a process status list. */ | |
347 | ||
348 | Lisp_Object | |
349 | status_message (status) | |
350 | Lisp_Object status; | |
351 | { | |
352 | Lisp_Object symbol; | |
353 | int code, coredump; | |
354 | Lisp_Object string, string2; | |
355 | ||
356 | decode_status (status, &symbol, &code, &coredump); | |
357 | ||
358 | if (EQ (symbol, Qsignal) || EQ (symbol, Qstop)) | |
359 | { | |
b97ad9ea RS |
360 | char *signame = 0; |
361 | if (code < NSIG) | |
362 | { | |
b0310da4 | 363 | #ifndef VMS |
ed0cae05 RS |
364 | /* Cast to suppress warning if the table has const char *. */ |
365 | signame = (char *) sys_siglist[code]; | |
b0310da4 | 366 | #else |
b97ad9ea | 367 | signame = sys_errlist[code]; |
b0310da4 | 368 | #endif |
b97ad9ea RS |
369 | } |
370 | if (signame == 0) | |
371 | signame = "unknown"; | |
372 | string = build_string (signame); | |
d0d6b7c5 JB |
373 | string2 = build_string (coredump ? " (core dumped)\n" : "\n"); |
374 | XSTRING (string)->data[0] = DOWNCASE (XSTRING (string)->data[0]); | |
375 | return concat2 (string, string2); | |
376 | } | |
377 | else if (EQ (symbol, Qexit)) | |
378 | { | |
379 | if (code == 0) | |
380 | return build_string ("finished\n"); | |
f2980264 | 381 | string = Fnumber_to_string (make_number (code)); |
d0d6b7c5 JB |
382 | string2 = build_string (coredump ? " (core dumped)\n" : "\n"); |
383 | return concat2 (build_string ("exited abnormally with code "), | |
384 | concat2 (string, string2)); | |
385 | } | |
386 | else | |
387 | return Fcopy_sequence (Fsymbol_name (symbol)); | |
388 | } | |
389 | \f | |
390 | #ifdef HAVE_PTYS | |
d0d6b7c5 | 391 | |
875e6b94 KH |
392 | /* Open an available pty, returning a file descriptor. |
393 | Return -1 on failure. | |
394 | The file name of the terminal corresponding to the pty | |
395 | is left in the variable pty_name. */ | |
396 | ||
d0d6b7c5 JB |
397 | int |
398 | allocate_pty () | |
399 | { | |
400 | struct stat stb; | |
dfcf069d | 401 | register int c, i; |
d0d6b7c5 JB |
402 | int fd; |
403 | ||
32676c08 JB |
404 | /* Some systems name their pseudoterminals so that there are gaps in |
405 | the usual sequence - for example, on HP9000/S700 systems, there | |
406 | are no pseudoterminals with names ending in 'f'. So we wait for | |
407 | three failures in a row before deciding that we've reached the | |
408 | end of the ptys. */ | |
409 | int failed_count = 0; | |
410 | ||
d0d6b7c5 JB |
411 | #ifdef PTY_ITERATION |
412 | PTY_ITERATION | |
413 | #else | |
414 | for (c = FIRST_PTY_LETTER; c <= 'z'; c++) | |
415 | for (i = 0; i < 16; i++) | |
416 | #endif | |
417 | { | |
418 | #ifdef PTY_NAME_SPRINTF | |
419 | PTY_NAME_SPRINTF | |
d0d6b7c5 JB |
420 | #else |
421 | sprintf (pty_name, "/dev/pty%c%x", c, i); | |
d0d6b7c5 JB |
422 | #endif /* no PTY_NAME_SPRINTF */ |
423 | ||
4d7c105e RS |
424 | #ifdef PTY_OPEN |
425 | PTY_OPEN; | |
426 | #else /* no PTY_OPEN */ | |
32676c08 JB |
427 | #ifdef IRIS |
428 | /* Unusual IRIS code */ | |
429 | *ptyv = open ("/dev/ptc", O_RDWR | O_NDELAY, 0); | |
430 | if (fd < 0) | |
431 | return -1; | |
432 | if (fstat (fd, &stb) < 0) | |
d0d6b7c5 | 433 | return -1; |
4d7c105e | 434 | #else /* not IRIS */ |
32676c08 JB |
435 | if (stat (pty_name, &stb) < 0) |
436 | { | |
437 | failed_count++; | |
438 | if (failed_count >= 3) | |
439 | return -1; | |
440 | } | |
441 | else | |
442 | failed_count = 0; | |
d0d6b7c5 JB |
443 | #ifdef O_NONBLOCK |
444 | fd = open (pty_name, O_RDWR | O_NONBLOCK, 0); | |
445 | #else | |
446 | fd = open (pty_name, O_RDWR | O_NDELAY, 0); | |
447 | #endif | |
4d7c105e RS |
448 | #endif /* not IRIS */ |
449 | #endif /* no PTY_OPEN */ | |
d0d6b7c5 JB |
450 | |
451 | if (fd >= 0) | |
452 | { | |
453 | /* check to make certain that both sides are available | |
454 | this avoids a nasty yet stupid bug in rlogins */ | |
455 | #ifdef PTY_TTY_NAME_SPRINTF | |
456 | PTY_TTY_NAME_SPRINTF | |
d0d6b7c5 JB |
457 | #else |
458 | sprintf (pty_name, "/dev/tty%c%x", c, i); | |
d0d6b7c5 JB |
459 | #endif /* no PTY_TTY_NAME_SPRINTF */ |
460 | #ifndef UNIPLUS | |
461 | if (access (pty_name, 6) != 0) | |
462 | { | |
463 | close (fd); | |
fad97cbe | 464 | #if !defined(IRIS) && !defined(__sgi) |
d0d6b7c5 JB |
465 | continue; |
466 | #else | |
467 | return -1; | |
468 | #endif /* IRIS */ | |
469 | } | |
470 | #endif /* not UNIPLUS */ | |
471 | setup_pty (fd); | |
472 | return fd; | |
473 | } | |
474 | } | |
475 | return -1; | |
476 | } | |
477 | #endif /* HAVE_PTYS */ | |
478 | \f | |
479 | Lisp_Object | |
480 | make_process (name) | |
481 | Lisp_Object name; | |
482 | { | |
23d6bb9c | 483 | struct Lisp_Vector *vec; |
d0d6b7c5 JB |
484 | register Lisp_Object val, tem, name1; |
485 | register struct Lisp_Process *p; | |
486 | char suffix[10]; | |
487 | register int i; | |
488 | ||
23d6bb9c KH |
489 | vec = allocate_vectorlike ((EMACS_INT) VECSIZE (struct Lisp_Process)); |
490 | for (i = 0; i < VECSIZE (struct Lisp_Process); i++) | |
491 | vec->contents[i] = Qnil; | |
492 | vec->size = VECSIZE (struct Lisp_Process); | |
493 | p = (struct Lisp_Process *)vec; | |
494 | ||
1d056e64 KH |
495 | XSETINT (p->infd, -1); |
496 | XSETINT (p->outfd, -1); | |
22719df2 KH |
497 | XSETFASTINT (p->pid, 0); |
498 | XSETFASTINT (p->tick, 0); | |
499 | XSETFASTINT (p->update_tick, 0); | |
d0d6b7c5 JB |
500 | p->raw_status_low = Qnil; |
501 | p->raw_status_high = Qnil; | |
502 | p->status = Qrun; | |
503 | p->mark = Fmake_marker (); | |
504 | ||
505 | /* If name is already in use, modify it until it is unused. */ | |
506 | ||
507 | name1 = name; | |
508 | for (i = 1; ; i++) | |
509 | { | |
510 | tem = Fget_process (name1); | |
511 | if (NILP (tem)) break; | |
512 | sprintf (suffix, "<%d>", i); | |
513 | name1 = concat2 (name, build_string (suffix)); | |
514 | } | |
515 | name = name1; | |
516 | p->name = name; | |
23d6bb9c | 517 | XSETPROCESS (val, p); |
d0d6b7c5 JB |
518 | Vprocess_alist = Fcons (Fcons (name, val), Vprocess_alist); |
519 | return val; | |
520 | } | |
521 | ||
dfcf069d | 522 | void |
d0d6b7c5 JB |
523 | remove_process (proc) |
524 | register Lisp_Object proc; | |
525 | { | |
526 | register Lisp_Object pair; | |
527 | ||
528 | pair = Frassq (proc, Vprocess_alist); | |
529 | Vprocess_alist = Fdelq (pair, Vprocess_alist); | |
d0d6b7c5 JB |
530 | |
531 | deactivate_process (proc); | |
532 | } | |
533 | \f | |
534 | DEFUN ("processp", Fprocessp, Sprocessp, 1, 1, 0, | |
535 | "Return t if OBJECT is a process.") | |
4ee3e309 EN |
536 | (object) |
537 | Lisp_Object object; | |
d0d6b7c5 | 538 | { |
4ee3e309 | 539 | return PROCESSP (object) ? Qt : Qnil; |
d0d6b7c5 JB |
540 | } |
541 | ||
542 | DEFUN ("get-process", Fget_process, Sget_process, 1, 1, 0, | |
543 | "Return the process named NAME, or nil if there is none.") | |
544 | (name) | |
545 | register Lisp_Object name; | |
546 | { | |
bcd69aea | 547 | if (PROCESSP (name)) |
d0d6b7c5 JB |
548 | return name; |
549 | CHECK_STRING (name, 0); | |
550 | return Fcdr (Fassoc (name, Vprocess_alist)); | |
551 | } | |
552 | ||
553 | DEFUN ("get-buffer-process", Fget_buffer_process, Sget_buffer_process, 1, 1, 0, | |
7744ca33 | 554 | "Return the (or a) process associated with BUFFER.\n\ |
d0d6b7c5 | 555 | BUFFER may be a buffer or the name of one.") |
4ee3e309 EN |
556 | (buffer) |
557 | register Lisp_Object buffer; | |
d0d6b7c5 JB |
558 | { |
559 | register Lisp_Object buf, tail, proc; | |
560 | ||
4ee3e309 EN |
561 | if (NILP (buffer)) return Qnil; |
562 | buf = Fget_buffer (buffer); | |
d0d6b7c5 JB |
563 | if (NILP (buf)) return Qnil; |
564 | ||
565 | for (tail = Vprocess_alist; !NILP (tail); tail = Fcdr (tail)) | |
566 | { | |
567 | proc = Fcdr (Fcar (tail)); | |
bcd69aea | 568 | if (PROCESSP (proc) && EQ (XPROCESS (proc)->buffer, buf)) |
d0d6b7c5 JB |
569 | return proc; |
570 | } | |
571 | return Qnil; | |
572 | } | |
573 | ||
ebb9e16f JB |
574 | /* This is how commands for the user decode process arguments. It |
575 | accepts a process, a process name, a buffer, a buffer name, or nil. | |
576 | Buffers denote the first process in the buffer, and nil denotes the | |
577 | current buffer. */ | |
d0d6b7c5 | 578 | |
77b221b1 | 579 | static Lisp_Object |
d0d6b7c5 JB |
580 | get_process (name) |
581 | register Lisp_Object name; | |
582 | { | |
1619761d KH |
583 | register Lisp_Object proc, obj; |
584 | if (STRINGP (name)) | |
585 | { | |
586 | obj = Fget_process (name); | |
587 | if (NILP (obj)) | |
588 | obj = Fget_buffer (name); | |
589 | if (NILP (obj)) | |
590 | error ("Process %s does not exist", XSTRING (name)->data); | |
591 | } | |
592 | else if (NILP (name)) | |
593 | obj = Fcurrent_buffer (); | |
d0d6b7c5 | 594 | else |
1619761d KH |
595 | obj = name; |
596 | ||
597 | /* Now obj should be either a buffer object or a process object. | |
598 | */ | |
599 | if (BUFFERP (obj)) | |
d0d6b7c5 | 600 | { |
1619761d | 601 | proc = Fget_buffer_process (obj); |
d0d6b7c5 | 602 | if (NILP (proc)) |
1619761d | 603 | error ("Buffer %s has no process", XSTRING (XBUFFER (obj)->name)->data); |
d0d6b7c5 | 604 | } |
d0d6b7c5 | 605 | else |
1619761d KH |
606 | { |
607 | CHECK_PROCESS (obj, 0); | |
608 | proc = obj; | |
609 | } | |
610 | return proc; | |
d0d6b7c5 JB |
611 | } |
612 | ||
613 | DEFUN ("delete-process", Fdelete_process, Sdelete_process, 1, 1, 0, | |
614 | "Delete PROCESS: kill it and forget about it immediately.\n\ | |
ebb9e16f JB |
615 | PROCESS may be a process, a buffer, the name of a process or buffer, or\n\ |
616 | nil, indicating the current buffer's process.") | |
4ee3e309 EN |
617 | (process) |
618 | register Lisp_Object process; | |
d0d6b7c5 | 619 | { |
4ee3e309 EN |
620 | process = get_process (process); |
621 | XPROCESS (process)->raw_status_low = Qnil; | |
622 | XPROCESS (process)->raw_status_high = Qnil; | |
623 | if (NETCONN_P (process)) | |
d0d6b7c5 | 624 | { |
4ee3e309 EN |
625 | XPROCESS (process)->status = Fcons (Qexit, Fcons (make_number (0), Qnil)); |
626 | XSETINT (XPROCESS (process)->tick, ++process_tick); | |
d0d6b7c5 | 627 | } |
4ee3e309 | 628 | else if (XINT (XPROCESS (process)->infd) >= 0) |
d0d6b7c5 | 629 | { |
4ee3e309 | 630 | Fkill_process (process, Qnil); |
d0d6b7c5 | 631 | /* Do this now, since remove_process will make sigchld_handler do nothing. */ |
4ee3e309 | 632 | XPROCESS (process)->status |
d0d6b7c5 | 633 | = Fcons (Qsignal, Fcons (make_number (SIGKILL), Qnil)); |
4ee3e309 | 634 | XSETINT (XPROCESS (process)->tick, ++process_tick); |
d0d6b7c5 JB |
635 | status_notify (); |
636 | } | |
4ee3e309 | 637 | remove_process (process); |
d0d6b7c5 JB |
638 | return Qnil; |
639 | } | |
640 | \f | |
641 | DEFUN ("process-status", Fprocess_status, Sprocess_status, 1, 1, 0, | |
7744ca33 KH |
642 | "Return the status of PROCESS.\n\ |
643 | The returned value is one of the following symbols:\n\ | |
d0d6b7c5 JB |
644 | run -- for a process that is running.\n\ |
645 | stop -- for a process stopped but continuable.\n\ | |
646 | exit -- for a process that has exited.\n\ | |
647 | signal -- for a process that has got a fatal signal.\n\ | |
648 | open -- for a network stream connection that is open.\n\ | |
649 | closed -- for a network stream connection that is closed.\n\ | |
ebb9e16f | 650 | nil -- if arg is a process name and no such process exists.\n\ |
31cd7d00 | 651 | PROCESS may be a process, a buffer, the name of a process, or\n\ |
ebb9e16f | 652 | nil, indicating the current buffer's process.") |
4ee3e309 EN |
653 | (process) |
654 | register Lisp_Object process; | |
d0d6b7c5 JB |
655 | { |
656 | register struct Lisp_Process *p; | |
657 | register Lisp_Object status; | |
343f4114 | 658 | |
4ee3e309 EN |
659 | if (STRINGP (process)) |
660 | process = Fget_process (process); | |
343f4114 | 661 | else |
4ee3e309 | 662 | process = get_process (process); |
343f4114 | 663 | |
4ee3e309 EN |
664 | if (NILP (process)) |
665 | return process; | |
343f4114 | 666 | |
4ee3e309 | 667 | p = XPROCESS (process); |
d0d6b7c5 JB |
668 | if (!NILP (p->raw_status_low)) |
669 | update_status (p); | |
670 | status = p->status; | |
bcd69aea | 671 | if (CONSP (status)) |
70949dac | 672 | status = XCAR (status); |
4ee3e309 | 673 | if (NETCONN_P (process)) |
d0d6b7c5 JB |
674 | { |
675 | if (EQ (status, Qrun)) | |
676 | status = Qopen; | |
677 | else if (EQ (status, Qexit)) | |
678 | status = Qclosed; | |
679 | } | |
680 | return status; | |
681 | } | |
682 | ||
683 | DEFUN ("process-exit-status", Fprocess_exit_status, Sprocess_exit_status, | |
684 | 1, 1, 0, | |
685 | "Return the exit status of PROCESS or the signal number that killed it.\n\ | |
686 | If PROCESS has not yet exited or died, return 0.") | |
4ee3e309 EN |
687 | (process) |
688 | register Lisp_Object process; | |
d0d6b7c5 | 689 | { |
4ee3e309 EN |
690 | CHECK_PROCESS (process, 0); |
691 | if (!NILP (XPROCESS (process)->raw_status_low)) | |
692 | update_status (XPROCESS (process)); | |
693 | if (CONSP (XPROCESS (process)->status)) | |
70949dac | 694 | return XCAR (XCDR (XPROCESS (process)->status)); |
d0d6b7c5 JB |
695 | return make_number (0); |
696 | } | |
697 | ||
698 | DEFUN ("process-id", Fprocess_id, Sprocess_id, 1, 1, 0, | |
699 | "Return the process id of PROCESS.\n\ | |
700 | This is the pid of the Unix process which PROCESS uses or talks to.\n\ | |
701 | For a network connection, this value is nil.") | |
4ee3e309 EN |
702 | (process) |
703 | register Lisp_Object process; | |
d0d6b7c5 | 704 | { |
4ee3e309 EN |
705 | CHECK_PROCESS (process, 0); |
706 | return XPROCESS (process)->pid; | |
d0d6b7c5 JB |
707 | } |
708 | ||
709 | DEFUN ("process-name", Fprocess_name, Sprocess_name, 1, 1, 0, | |
710 | "Return the name of PROCESS, as a string.\n\ | |
711 | This is the name of the program invoked in PROCESS,\n\ | |
712 | possibly modified to make it unique among process names.") | |
4ee3e309 EN |
713 | (process) |
714 | register Lisp_Object process; | |
d0d6b7c5 | 715 | { |
4ee3e309 EN |
716 | CHECK_PROCESS (process, 0); |
717 | return XPROCESS (process)->name; | |
d0d6b7c5 JB |
718 | } |
719 | ||
720 | DEFUN ("process-command", Fprocess_command, Sprocess_command, 1, 1, 0, | |
721 | "Return the command that was executed to start PROCESS.\n\ | |
722 | This is a list of strings, the first string being the program executed\n\ | |
723 | and the rest of the strings being the arguments given to it.\n\ | |
724 | For a non-child channel, this is nil.") | |
4ee3e309 EN |
725 | (process) |
726 | register Lisp_Object process; | |
d0d6b7c5 | 727 | { |
4ee3e309 EN |
728 | CHECK_PROCESS (process, 0); |
729 | return XPROCESS (process)->command; | |
d0d6b7c5 JB |
730 | } |
731 | ||
3b9a3dfa RS |
732 | DEFUN ("process-tty-name", Fprocess_tty_name, Sprocess_tty_name, 1, 1, 0, |
733 | "Return the name of the terminal PROCESS uses, or nil if none.\n\ | |
734 | This is the terminal that the process itself reads and writes on,\n\ | |
735 | not the name of the pty that Emacs uses to talk with that terminal.") | |
4ee3e309 EN |
736 | (process) |
737 | register Lisp_Object process; | |
3b9a3dfa | 738 | { |
4ee3e309 EN |
739 | CHECK_PROCESS (process, 0); |
740 | return XPROCESS (process)->tty_name; | |
3b9a3dfa RS |
741 | } |
742 | ||
d0d6b7c5 JB |
743 | DEFUN ("set-process-buffer", Fset_process_buffer, Sset_process_buffer, |
744 | 2, 2, 0, | |
745 | "Set buffer associated with PROCESS to BUFFER (a buffer, or nil).") | |
4ee3e309 EN |
746 | (process, buffer) |
747 | register Lisp_Object process, buffer; | |
d0d6b7c5 | 748 | { |
4ee3e309 | 749 | CHECK_PROCESS (process, 0); |
d0d6b7c5 JB |
750 | if (!NILP (buffer)) |
751 | CHECK_BUFFER (buffer, 1); | |
4ee3e309 | 752 | XPROCESS (process)->buffer = buffer; |
d0d6b7c5 JB |
753 | return buffer; |
754 | } | |
755 | ||
756 | DEFUN ("process-buffer", Fprocess_buffer, Sprocess_buffer, | |
757 | 1, 1, 0, | |
758 | "Return the buffer PROCESS is associated with.\n\ | |
7744ca33 | 759 | Output from PROCESS is inserted in this buffer unless PROCESS has a filter.") |
4ee3e309 EN |
760 | (process) |
761 | register Lisp_Object process; | |
d0d6b7c5 | 762 | { |
4ee3e309 EN |
763 | CHECK_PROCESS (process, 0); |
764 | return XPROCESS (process)->buffer; | |
d0d6b7c5 JB |
765 | } |
766 | ||
767 | DEFUN ("process-mark", Fprocess_mark, Sprocess_mark, | |
768 | 1, 1, 0, | |
769 | "Return the marker for the end of the last output from PROCESS.") | |
4ee3e309 EN |
770 | (process) |
771 | register Lisp_Object process; | |
d0d6b7c5 | 772 | { |
4ee3e309 EN |
773 | CHECK_PROCESS (process, 0); |
774 | return XPROCESS (process)->mark; | |
d0d6b7c5 JB |
775 | } |
776 | ||
777 | DEFUN ("set-process-filter", Fset_process_filter, Sset_process_filter, | |
778 | 2, 2, 0, | |
779 | "Give PROCESS the filter function FILTER; nil means no filter.\n\ | |
20ddfff7 | 780 | t means stop accepting output from the process.\n\ |
d0d6b7c5 JB |
781 | When a process has a filter, each time it does output\n\ |
782 | the entire string of output is passed to the filter.\n\ | |
783 | The filter gets two arguments: the process and the string of output.\n\ | |
784 | If the process has a filter, its buffer is not used for output.") | |
4ee3e309 EN |
785 | (process, filter) |
786 | register Lisp_Object process, filter; | |
d0d6b7c5 | 787 | { |
4ee3e309 | 788 | CHECK_PROCESS (process, 0); |
20ddfff7 | 789 | if (EQ (filter, Qt)) |
a69281ff | 790 | { |
4ee3e309 EN |
791 | FD_CLR (XINT (XPROCESS (process)->infd), &input_wait_mask); |
792 | FD_CLR (XINT (XPROCESS (process)->infd), &non_keyboard_wait_mask); | |
a69281ff | 793 | } |
4ee3e309 | 794 | else if (EQ (XPROCESS (process)->filter, Qt)) |
a69281ff | 795 | { |
4ee3e309 EN |
796 | FD_SET (XINT (XPROCESS (process)->infd), &input_wait_mask); |
797 | FD_SET (XINT (XPROCESS (process)->infd), &non_keyboard_wait_mask); | |
a69281ff | 798 | } |
4ee3e309 | 799 | XPROCESS (process)->filter = filter; |
d0d6b7c5 JB |
800 | return filter; |
801 | } | |
802 | ||
803 | DEFUN ("process-filter", Fprocess_filter, Sprocess_filter, | |
804 | 1, 1, 0, | |
805 | "Returns the filter function of PROCESS; nil if none.\n\ | |
806 | See `set-process-filter' for more info on filter functions.") | |
4ee3e309 EN |
807 | (process) |
808 | register Lisp_Object process; | |
d0d6b7c5 | 809 | { |
4ee3e309 EN |
810 | CHECK_PROCESS (process, 0); |
811 | return XPROCESS (process)->filter; | |
d0d6b7c5 JB |
812 | } |
813 | ||
814 | DEFUN ("set-process-sentinel", Fset_process_sentinel, Sset_process_sentinel, | |
815 | 2, 2, 0, | |
816 | "Give PROCESS the sentinel SENTINEL; nil for none.\n\ | |
817 | The sentinel is called as a function when the process changes state.\n\ | |
818 | It gets two arguments: the process, and a string describing the change.") | |
4ee3e309 EN |
819 | (process, sentinel) |
820 | register Lisp_Object process, sentinel; | |
d0d6b7c5 | 821 | { |
4ee3e309 EN |
822 | CHECK_PROCESS (process, 0); |
823 | XPROCESS (process)->sentinel = sentinel; | |
d0d6b7c5 JB |
824 | return sentinel; |
825 | } | |
826 | ||
827 | DEFUN ("process-sentinel", Fprocess_sentinel, Sprocess_sentinel, | |
828 | 1, 1, 0, | |
829 | "Return the sentinel of PROCESS; nil if none.\n\ | |
830 | See `set-process-sentinel' for more info on sentinels.") | |
4ee3e309 EN |
831 | (process) |
832 | register Lisp_Object process; | |
d0d6b7c5 | 833 | { |
4ee3e309 EN |
834 | CHECK_PROCESS (process, 0); |
835 | return XPROCESS (process)->sentinel; | |
d0d6b7c5 JB |
836 | } |
837 | ||
396df322 RS |
838 | DEFUN ("set-process-window-size", Fset_process_window_size, |
839 | Sset_process_window_size, 3, 3, 0, | |
840 | "Tell PROCESS that it has logical window size HEIGHT and WIDTH.") | |
4ee3e309 EN |
841 | (process, height, width) |
842 | register Lisp_Object process, height, width; | |
396df322 | 843 | { |
4ee3e309 | 844 | CHECK_PROCESS (process, 0); |
396df322 RS |
845 | CHECK_NATNUM (height, 0); |
846 | CHECK_NATNUM (width, 0); | |
4ee3e309 | 847 | if (set_window_size (XINT (XPROCESS (process)->infd), |
a319f7c1 | 848 | XINT (height), XINT (width)) <= 0) |
396df322 RS |
849 | return Qnil; |
850 | else | |
851 | return Qt; | |
852 | } | |
853 | ||
52a1b894 EZ |
854 | DEFUN ("set-process-inherit-coding-system-flag", |
855 | Fset_process_inherit_coding_system_flag, | |
856 | Sset_process_inherit_coding_system_flag, 2, 2, 0, | |
857 | "Determine whether buffer of PROCESS will inherit coding-system.\n\ | |
858 | If the second argument FLAG is non-nil, then the variable\n\ | |
859 | `buffer-file-coding-system' of the buffer associated with PROCESS\n\ | |
860 | will be bound to the value of the coding system used to decode\n\ | |
861 | the process output.\n\ | |
862 | \n\ | |
863 | This is useful when the coding system specified for the process buffer\n\ | |
864 | leaves either the character code conversion or the end-of-line conversion\n\ | |
865 | unspecified, or if the coding system used to decode the process output\n\ | |
866 | is more appropriate for saving the process buffer.\n\ | |
867 | \n\ | |
868 | Binding the variable `inherit-process-coding-system' to non-nil before\n\ | |
869 | starting the process is an alternative way of setting the inherit flag\n\ | |
870 | for the process which will run.") | |
871 | (process, flag) | |
872 | register Lisp_Object process, flag; | |
873 | { | |
874 | CHECK_PROCESS (process, 0); | |
aa91317a | 875 | XPROCESS (process)->inherit_coding_system_flag = flag; |
52a1b894 EZ |
876 | return flag; |
877 | } | |
878 | ||
879 | DEFUN ("process-inherit-coding-system-flag", | |
880 | Fprocess_inherit_coding_system_flag, Sprocess_inherit_coding_system_flag, | |
881 | 1, 1, 0, | |
882 | "Return the value of inherit-coding-system flag for PROCESS.\n\ | |
883 | If this flag is t, `buffer-file-coding-system' of the buffer\n\ | |
884 | associated with PROCESS will inherit the coding system used to decode\n\ | |
885 | the process output.") | |
886 | (process) | |
887 | register Lisp_Object process; | |
888 | { | |
889 | CHECK_PROCESS (process, 0); | |
aa91317a | 890 | return XPROCESS (process)->inherit_coding_system_flag; |
52a1b894 EZ |
891 | } |
892 | ||
d0d6b7c5 JB |
893 | DEFUN ("process-kill-without-query", Fprocess_kill_without_query, |
894 | Sprocess_kill_without_query, 1, 2, 0, | |
895 | "Say no query needed if PROCESS is running when Emacs is exited.\n\ | |
f2d2dbfe | 896 | Optional second argument if non-nil says to require a query.\n\ |
d0d6b7c5 | 897 | Value is t if a query was formerly required.") |
4ee3e309 EN |
898 | (process, value) |
899 | register Lisp_Object process, value; | |
d0d6b7c5 JB |
900 | { |
901 | Lisp_Object tem; | |
902 | ||
4ee3e309 EN |
903 | CHECK_PROCESS (process, 0); |
904 | tem = XPROCESS (process)->kill_without_query; | |
905 | XPROCESS (process)->kill_without_query = Fnull (value); | |
d0d6b7c5 JB |
906 | |
907 | return Fnull (tem); | |
908 | } | |
312c9964 | 909 | |
de282a05 RS |
910 | DEFUN ("process-contact", Fprocess_contact, Sprocess_contact, |
911 | 1, 1, 0, | |
912 | "Return the contact info of PROCESS; t for a real child.\n\ | |
913 | For a net connection, the value is a cons cell of the form (HOST SERVICE).") | |
914 | (process) | |
915 | register Lisp_Object process; | |
916 | { | |
917 | CHECK_PROCESS (process, 0); | |
918 | return XPROCESS (process)->childp; | |
919 | } | |
920 | ||
312c9964 RS |
921 | #if 0 /* Turned off because we don't currently record this info |
922 | in the process. Perhaps add it. */ | |
923 | DEFUN ("process-connection", Fprocess_connection, Sprocess_connection, 1, 1, 0, | |
7744ca33 KH |
924 | "Return the connection type of PROCESS.\n\ |
925 | The value is nil for a pipe, t or `pty' for a pty, or `stream' for\n\ | |
926 | a socket connection.") | |
312c9964 RS |
927 | (process) |
928 | Lisp_Object process; | |
929 | { | |
930 | return XPROCESS (process)->type; | |
931 | } | |
932 | #endif | |
d0d6b7c5 JB |
933 | \f |
934 | Lisp_Object | |
935 | list_processes_1 () | |
936 | { | |
937 | register Lisp_Object tail, tem; | |
938 | Lisp_Object proc, minspace, tem1; | |
d0d6b7c5 | 939 | register struct Lisp_Process *p; |
d0d6b7c5 JB |
940 | char tembuf[80]; |
941 | ||
22719df2 | 942 | XSETFASTINT (minspace, 1); |
d0d6b7c5 JB |
943 | |
944 | set_buffer_internal (XBUFFER (Vstandard_output)); | |
945 | Fbuffer_disable_undo (Vstandard_output); | |
946 | ||
947 | current_buffer->truncate_lines = Qt; | |
948 | ||
949 | write_string ("\ | |
a9fde32e KH |
950 | Proc Status Buffer Tty Command\n\ |
951 | ---- ------ ------ --- -------\n", -1); | |
d0d6b7c5 JB |
952 | |
953 | for (tail = Vprocess_alist; !NILP (tail); tail = Fcdr (tail)) | |
954 | { | |
955 | Lisp_Object symbol; | |
956 | ||
957 | proc = Fcdr (Fcar (tail)); | |
958 | p = XPROCESS (proc); | |
959 | if (NILP (p->childp)) | |
960 | continue; | |
961 | ||
962 | Finsert (1, &p->name); | |
963 | Findent_to (make_number (13), minspace); | |
964 | ||
965 | if (!NILP (p->raw_status_low)) | |
966 | update_status (p); | |
967 | symbol = p->status; | |
bcd69aea | 968 | if (CONSP (p->status)) |
70949dac | 969 | symbol = XCAR (p->status); |
d0d6b7c5 JB |
970 | |
971 | ||
972 | if (EQ (symbol, Qsignal)) | |
973 | { | |
974 | Lisp_Object tem; | |
975 | tem = Fcar (Fcdr (p->status)); | |
976 | #ifdef VMS | |
977 | if (XINT (tem) < NSIG) | |
b0310da4 | 978 | write_string (sys_errlist [XINT (tem)], -1); |
d0d6b7c5 JB |
979 | else |
980 | #endif | |
981 | Fprinc (symbol, Qnil); | |
982 | } | |
983 | else if (NETCONN_P (proc)) | |
984 | { | |
985 | if (EQ (symbol, Qrun)) | |
986 | write_string ("open", -1); | |
987 | else if (EQ (symbol, Qexit)) | |
988 | write_string ("closed", -1); | |
989 | else | |
990 | Fprinc (symbol, Qnil); | |
991 | } | |
992 | else | |
993 | Fprinc (symbol, Qnil); | |
994 | ||
995 | if (EQ (symbol, Qexit)) | |
996 | { | |
997 | Lisp_Object tem; | |
998 | tem = Fcar (Fcdr (p->status)); | |
999 | if (XFASTINT (tem)) | |
1000 | { | |
3162bafa | 1001 | sprintf (tembuf, " %d", (int) XFASTINT (tem)); |
d0d6b7c5 JB |
1002 | write_string (tembuf, -1); |
1003 | } | |
1004 | } | |
1005 | ||
1006 | if (EQ (symbol, Qsignal) || EQ (symbol, Qexit)) | |
1007 | remove_process (proc); | |
1008 | ||
1009 | Findent_to (make_number (22), minspace); | |
1010 | if (NILP (p->buffer)) | |
1011 | insert_string ("(none)"); | |
1012 | else if (NILP (XBUFFER (p->buffer)->name)) | |
1013 | insert_string ("(Killed)"); | |
1014 | else | |
1015 | Finsert (1, &XBUFFER (p->buffer)->name); | |
1016 | ||
1017 | Findent_to (make_number (37), minspace); | |
1018 | ||
a9fde32e KH |
1019 | if (STRINGP (p->tty_name)) |
1020 | Finsert (1, &p->tty_name); | |
1021 | else | |
1022 | insert_string ("(none)"); | |
1023 | ||
1024 | Findent_to (make_number (49), minspace); | |
1025 | ||
d0d6b7c5 JB |
1026 | if (NETCONN_P (proc)) |
1027 | { | |
1028 | sprintf (tembuf, "(network stream connection to %s)\n", | |
70949dac | 1029 | XSTRING (XCAR (p->childp))->data); |
d0d6b7c5 JB |
1030 | insert_string (tembuf); |
1031 | } | |
1032 | else | |
1033 | { | |
1034 | tem = p->command; | |
1035 | while (1) | |
1036 | { | |
1037 | tem1 = Fcar (tem); | |
1038 | Finsert (1, &tem1); | |
1039 | tem = Fcdr (tem); | |
1040 | if (NILP (tem)) | |
1041 | break; | |
1042 | insert_string (" "); | |
1043 | } | |
1044 | insert_string ("\n"); | |
1045 | } | |
1046 | } | |
1047 | return Qnil; | |
1048 | } | |
1049 | ||
1050 | DEFUN ("list-processes", Flist_processes, Slist_processes, 0, 0, "", | |
1051 | "Display a list of all processes.\n\ | |
7744ca33 KH |
1052 | Any process listed as exited or signaled is actually eliminated\n\ |
1053 | after the listing is made.") | |
d0d6b7c5 JB |
1054 | () |
1055 | { | |
1056 | internal_with_output_to_temp_buffer ("*Process List*", | |
1057 | list_processes_1, Qnil); | |
1058 | return Qnil; | |
1059 | } | |
1060 | ||
1061 | DEFUN ("process-list", Fprocess_list, Sprocess_list, 0, 0, 0, | |
1062 | "Return a list of all processes.") | |
1063 | () | |
1064 | { | |
1065 | return Fmapcar (Qcdr, Vprocess_alist); | |
1066 | } | |
1067 | \f | |
b0310da4 JB |
1068 | /* Starting asynchronous inferior processes. */ |
1069 | ||
1070 | static Lisp_Object start_process_unwind (); | |
1071 | ||
d0d6b7c5 JB |
1072 | DEFUN ("start-process", Fstart_process, Sstart_process, 3, MANY, 0, |
1073 | "Start a program in a subprocess. Return the process object for it.\n\ | |
1074 | Args are NAME BUFFER PROGRAM &rest PROGRAM-ARGS\n\ | |
1075 | NAME is name for process. It is modified if necessary to make it unique.\n\ | |
1076 | BUFFER is the buffer or (buffer-name) to associate with the process.\n\ | |
1077 | Process output goes at end of that buffer, unless you specify\n\ | |
1078 | an output stream or filter function to handle the output.\n\ | |
1079 | BUFFER may be also nil, meaning that this process is not associated\n\ | |
0fa1789e | 1080 | with any buffer.\n\ |
8f1ecd05 | 1081 | Third arg is program file name. It is searched for in PATH.\n\ |
d0d6b7c5 JB |
1082 | Remaining arguments are strings to give program as arguments.") |
1083 | (nargs, args) | |
1084 | int nargs; | |
1085 | register Lisp_Object *args; | |
1086 | { | |
1e30af70 | 1087 | Lisp_Object buffer, name, program, proc, current_dir, tem; |
d0d6b7c5 JB |
1088 | #ifdef VMS |
1089 | register unsigned char *new_argv; | |
1090 | int len; | |
1091 | #else | |
1092 | register unsigned char **new_argv; | |
1093 | #endif | |
1094 | register int i; | |
b0310da4 | 1095 | int count = specpdl_ptr - specpdl; |
d0d6b7c5 JB |
1096 | |
1097 | buffer = args[1]; | |
1098 | if (!NILP (buffer)) | |
1099 | buffer = Fget_buffer_create (buffer); | |
1100 | ||
1e30af70 JB |
1101 | /* Make sure that the child will be able to chdir to the current |
1102 | buffer's current directory, or its unhandled equivalent. We | |
1103 | can't just have the child check for an error when it does the | |
1104 | chdir, since it's in a vfork. | |
1105 | ||
1106 | We have to GCPRO around this because Fexpand_file_name and | |
1107 | Funhandled_file_name_directory might call a file name handling | |
1108 | function. The argument list is protected by the caller, so all | |
1109 | we really have to worry about is buffer. */ | |
1110 | { | |
1111 | struct gcpro gcpro1, gcpro2; | |
1112 | ||
1113 | current_dir = current_buffer->directory; | |
1114 | ||
1115 | GCPRO2 (buffer, current_dir); | |
1116 | ||
7af71e17 RS |
1117 | current_dir |
1118 | = expand_and_dir_to_file (Funhandled_file_name_directory (current_dir), | |
1119 | Qnil); | |
1e30af70 JB |
1120 | if (NILP (Ffile_accessible_directory_p (current_dir))) |
1121 | report_file_error ("Setting current directory", | |
1122 | Fcons (current_buffer->directory, Qnil)); | |
1123 | ||
1124 | UNGCPRO; | |
1125 | } | |
1126 | ||
d0d6b7c5 JB |
1127 | name = args[0]; |
1128 | CHECK_STRING (name, 0); | |
1129 | ||
1130 | program = args[2]; | |
1131 | ||
1132 | CHECK_STRING (program, 2); | |
1133 | ||
1134 | #ifdef VMS | |
1135 | /* Make a one member argv with all args concatenated | |
1136 | together separated by a blank. */ | |
fc932ac6 | 1137 | len = STRING_BYTES (XSTRING (program)) + 2; |
d0d6b7c5 JB |
1138 | for (i = 3; i < nargs; i++) |
1139 | { | |
1140 | tem = args[i]; | |
1141 | CHECK_STRING (tem, i); | |
fc932ac6 | 1142 | len += STRING_BYTES (XSTRING (tem)) + 1; /* count the blank */ |
d0d6b7c5 JB |
1143 | } |
1144 | new_argv = (unsigned char *) alloca (len); | |
1145 | strcpy (new_argv, XSTRING (program)->data); | |
1146 | for (i = 3; i < nargs; i++) | |
1147 | { | |
1148 | tem = args[i]; | |
1149 | CHECK_STRING (tem, i); | |
1150 | strcat (new_argv, " "); | |
1151 | strcat (new_argv, XSTRING (tem)->data); | |
1152 | } | |
b0310da4 JB |
1153 | /* Need to add code here to check for program existence on VMS */ |
1154 | ||
d0d6b7c5 JB |
1155 | #else /* not VMS */ |
1156 | new_argv = (unsigned char **) alloca ((nargs - 1) * sizeof (char *)); | |
1157 | ||
d0d6b7c5 | 1158 | /* If program file name is not absolute, search our path for it */ |
e98d950b RS |
1159 | if (!IS_DIRECTORY_SEP (XSTRING (program)->data[0]) |
1160 | && !(XSTRING (program)->size > 1 | |
1161 | && IS_DEVICE_SEP (XSTRING (program)->data[1]))) | |
d0d6b7c5 | 1162 | { |
3b639868 KH |
1163 | struct gcpro gcpro1, gcpro2, gcpro3, gcpro4; |
1164 | ||
d0d6b7c5 | 1165 | tem = Qnil; |
3b639868 | 1166 | GCPRO4 (name, program, buffer, current_dir); |
5437e9f9 | 1167 | openp (Vexec_path, program, EXEC_SUFFIXES, &tem, 1); |
3b639868 | 1168 | UNGCPRO; |
d0d6b7c5 JB |
1169 | if (NILP (tem)) |
1170 | report_file_error ("Searching for program", Fcons (program, Qnil)); | |
f8a87498 | 1171 | tem = Fexpand_file_name (tem, Qnil); |
d0d6b7c5 JB |
1172 | new_argv[0] = XSTRING (tem)->data; |
1173 | } | |
3b639868 | 1174 | else |
13373f4e RS |
1175 | { |
1176 | if (!NILP (Ffile_directory_p (program))) | |
1177 | error ("Specified program for new process is a directory"); | |
1178 | ||
1179 | new_argv[0] = XSTRING (program)->data; | |
1180 | } | |
3b639868 KH |
1181 | |
1182 | for (i = 3; i < nargs; i++) | |
1183 | { | |
1184 | tem = args[i]; | |
1185 | CHECK_STRING (tem, i); | |
1186 | new_argv[i - 2] = XSTRING (tem)->data; | |
1187 | } | |
1188 | new_argv[i - 2] = 0; | |
d0d6b7c5 JB |
1189 | #endif /* not VMS */ |
1190 | ||
1191 | proc = make_process (name); | |
b0310da4 JB |
1192 | /* If an error occurs and we can't start the process, we want to |
1193 | remove it from the process list. This means that each error | |
1194 | check in create_process doesn't need to call remove_process | |
1195 | itself; it's all taken care of here. */ | |
1196 | record_unwind_protect (start_process_unwind, proc); | |
d0d6b7c5 JB |
1197 | |
1198 | XPROCESS (proc)->childp = Qt; | |
1199 | XPROCESS (proc)->command_channel_p = Qnil; | |
1200 | XPROCESS (proc)->buffer = buffer; | |
1201 | XPROCESS (proc)->sentinel = Qnil; | |
1202 | XPROCESS (proc)->filter = Qnil; | |
1203 | XPROCESS (proc)->command = Flist (nargs - 2, args + 2); | |
1204 | ||
7af71e17 RS |
1205 | /* Make the process marker point into the process buffer (if any). */ |
1206 | if (!NILP (buffer)) | |
d8a2934e RS |
1207 | set_marker_both (XPROCESS (proc)->mark, buffer, |
1208 | BUF_ZV (XBUFFER (buffer)), | |
1209 | BUF_ZV_BYTE (XBUFFER (buffer))); | |
7af71e17 | 1210 | |
67918941 | 1211 | { |
d5d4ae71 KH |
1212 | /* Decide coding systems for communicating with the process. Here |
1213 | we don't setup the structure coding_system nor pay attention to | |
1214 | unibyte mode. They are done in create_process. */ | |
1215 | ||
67918941 RS |
1216 | /* Qt denotes we have not yet called Ffind_operation_coding_system. */ |
1217 | Lisp_Object coding_systems = Qt; | |
1218 | Lisp_Object val, *args2; | |
1219 | struct gcpro gcpro1; | |
1220 | ||
d5d4ae71 KH |
1221 | val = Vcoding_system_for_read; |
1222 | if (NILP (val)) | |
67918941 RS |
1223 | { |
1224 | args2 = (Lisp_Object *) alloca ((nargs + 1) * sizeof *args2); | |
1225 | args2[0] = Qstart_process; | |
1226 | for (i = 0; i < nargs; i++) args2[i + 1] = args[i]; | |
1227 | GCPRO1 (proc); | |
1228 | coding_systems = Ffind_operation_coding_system (nargs + 1, args2); | |
1229 | UNGCPRO; | |
1230 | if (CONSP (coding_systems)) | |
70949dac | 1231 | val = XCAR (coding_systems); |
67918941 | 1232 | else if (CONSP (Vdefault_process_coding_system)) |
70949dac | 1233 | val = XCAR (Vdefault_process_coding_system); |
67918941 RS |
1234 | } |
1235 | XPROCESS (proc)->decode_coding_system = val; | |
1236 | ||
d5d4ae71 KH |
1237 | val = Vcoding_system_for_write; |
1238 | if (NILP (val)) | |
67918941 RS |
1239 | { |
1240 | if (EQ (coding_systems, Qt)) | |
1241 | { | |
1242 | args2 = (Lisp_Object *) alloca ((nargs + 1) * sizeof args2); | |
1243 | args2[0] = Qstart_process; | |
1244 | for (i = 0; i < nargs; i++) args2[i + 1] = args[i]; | |
1245 | GCPRO1 (proc); | |
1246 | coding_systems = Ffind_operation_coding_system (nargs + 1, args2); | |
1247 | UNGCPRO; | |
1248 | } | |
1249 | if (CONSP (coding_systems)) | |
70949dac | 1250 | val = XCDR (coding_systems); |
67918941 | 1251 | else if (CONSP (Vdefault_process_coding_system)) |
70949dac | 1252 | val = XCDR (Vdefault_process_coding_system); |
67918941 RS |
1253 | } |
1254 | XPROCESS (proc)->encode_coding_system = val; | |
1255 | } | |
0fa1789e KH |
1256 | |
1257 | XPROCESS (proc)->decoding_buf = make_uninit_string (0); | |
e7fbaa65 | 1258 | XPROCESS (proc)->decoding_carryover = make_number (0); |
0fa1789e | 1259 | XPROCESS (proc)->encoding_buf = make_uninit_string (0); |
e7fbaa65 | 1260 | XPROCESS (proc)->encoding_carryover = make_number (0); |
0fa1789e | 1261 | |
52a1b894 | 1262 | XPROCESS (proc)->inherit_coding_system_flag |
aa91317a RS |
1263 | = (NILP (buffer) || !inherit_process_coding_system |
1264 | ? Qnil : Qt); | |
52a1b894 | 1265 | |
6b53bb85 | 1266 | create_process (proc, (char **) new_argv, current_dir); |
d0d6b7c5 | 1267 | |
b0310da4 | 1268 | return unbind_to (count, proc); |
d0d6b7c5 JB |
1269 | } |
1270 | ||
b0310da4 | 1271 | /* This function is the unwind_protect form for Fstart_process. If |
8e6208c5 | 1272 | PROC doesn't have its pid set, then we know someone has signaled |
b0310da4 JB |
1273 | an error and the process wasn't started successfully, so we should |
1274 | remove it from the process list. */ | |
1275 | static Lisp_Object | |
1276 | start_process_unwind (proc) | |
1277 | Lisp_Object proc; | |
1278 | { | |
bcd69aea | 1279 | if (!PROCESSP (proc)) |
b0310da4 JB |
1280 | abort (); |
1281 | ||
1282 | /* Was PROC started successfully? */ | |
188d6c4e | 1283 | if (XINT (XPROCESS (proc)->pid) <= 0) |
b0310da4 JB |
1284 | remove_process (proc); |
1285 | ||
1286 | return Qnil; | |
1287 | } | |
1288 | ||
1289 | ||
d0d6b7c5 JB |
1290 | SIGTYPE |
1291 | create_process_1 (signo) | |
1292 | int signo; | |
1293 | { | |
3c0ee47b | 1294 | #if defined (USG) && !defined (POSIX_SIGNALS) |
d0d6b7c5 JB |
1295 | /* USG systems forget handlers when they are used; |
1296 | must reestablish each time */ | |
1297 | signal (signo, create_process_1); | |
1298 | #endif /* USG */ | |
1299 | } | |
1300 | ||
1301 | #if 0 /* This doesn't work; see the note before sigchld_handler. */ | |
1302 | #ifdef USG | |
1303 | #ifdef SIGCHLD | |
1304 | /* Mimic blocking of signals on system V, which doesn't really have it. */ | |
1305 | ||
1306 | /* Nonzero means we got a SIGCHLD when it was supposed to be blocked. */ | |
1307 | int sigchld_deferred; | |
1308 | ||
1309 | SIGTYPE | |
1310 | create_process_sigchld () | |
1311 | { | |
1312 | signal (SIGCHLD, create_process_sigchld); | |
1313 | ||
1314 | sigchld_deferred = 1; | |
1315 | } | |
1316 | #endif | |
1317 | #endif | |
1318 | #endif | |
1319 | ||
1320 | #ifndef VMS /* VMS version of this function is in vmsproc.c. */ | |
6b53bb85 | 1321 | void |
1e30af70 | 1322 | create_process (process, new_argv, current_dir) |
d0d6b7c5 JB |
1323 | Lisp_Object process; |
1324 | char **new_argv; | |
1e30af70 | 1325 | Lisp_Object current_dir; |
d0d6b7c5 | 1326 | { |
ecd1f654 | 1327 | int pid, inchannel, outchannel; |
d0d6b7c5 | 1328 | int sv[2]; |
0dc70c33 KH |
1329 | #ifdef POSIX_SIGNALS |
1330 | sigset_t procmask; | |
1331 | sigset_t blocked; | |
1332 | struct sigaction sigint_action; | |
1333 | struct sigaction sigquit_action; | |
1334 | #ifdef AIX | |
1335 | struct sigaction sighup_action; | |
1336 | #endif | |
1337 | #else /* !POSIX_SIGNALS */ | |
41d03b9a | 1338 | #if 0 |
d0d6b7c5 JB |
1339 | #ifdef SIGCHLD |
1340 | SIGTYPE (*sigchld)(); | |
1341 | #endif | |
41d03b9a | 1342 | #endif /* 0 */ |
0dc70c33 | 1343 | #endif /* !POSIX_SIGNALS */ |
ecd1f654 KH |
1344 | /* Use volatile to protect variables from being clobbered by longjmp. */ |
1345 | volatile int forkin, forkout; | |
1346 | volatile int pty_flag = 0; | |
d0d6b7c5 | 1347 | extern char **environ; |
d5d4ae71 | 1348 | Lisp_Object buffer = XPROCESS (process)->buffer; |
d0d6b7c5 | 1349 | |
d0d6b7c5 JB |
1350 | inchannel = outchannel = -1; |
1351 | ||
1352 | #ifdef HAVE_PTYS | |
fe45da4e | 1353 | if (!NILP (Vprocess_connection_type)) |
d0d6b7c5 JB |
1354 | outchannel = inchannel = allocate_pty (); |
1355 | ||
d0d6b7c5 JB |
1356 | if (inchannel >= 0) |
1357 | { | |
1358 | #ifndef USG | |
1359 | /* On USG systems it does not work to open the pty's tty here | |
1360 | and then close and reopen it in the child. */ | |
1361 | #ifdef O_NOCTTY | |
1362 | /* Don't let this terminal become our controlling terminal | |
1363 | (in case we don't have one). */ | |
1364 | forkout = forkin = open (pty_name, O_RDWR | O_NOCTTY, 0); | |
1365 | #else | |
1366 | forkout = forkin = open (pty_name, O_RDWR, 0); | |
1367 | #endif | |
1368 | if (forkin < 0) | |
1369 | report_file_error ("Opening pty", Qnil); | |
1370 | #else | |
1371 | forkin = forkout = -1; | |
1372 | #endif /* not USG */ | |
1373 | pty_flag = 1; | |
1374 | } | |
1375 | else | |
1376 | #endif /* HAVE_PTYS */ | |
1377 | #ifdef SKTPAIR | |
1378 | { | |
1379 | if (socketpair (AF_UNIX, SOCK_STREAM, 0, sv) < 0) | |
1380 | report_file_error ("Opening socketpair", Qnil); | |
1381 | outchannel = inchannel = sv[0]; | |
1382 | forkout = forkin = sv[1]; | |
1383 | } | |
1384 | #else /* not SKTPAIR */ | |
1385 | { | |
fc14013c KH |
1386 | int tem; |
1387 | tem = pipe (sv); | |
1388 | if (tem < 0) | |
1389 | report_file_error ("Creating pipe", Qnil); | |
d0d6b7c5 JB |
1390 | inchannel = sv[0]; |
1391 | forkout = sv[1]; | |
fc14013c KH |
1392 | tem = pipe (sv); |
1393 | if (tem < 0) | |
1394 | { | |
1395 | close (inchannel); | |
1396 | close (forkout); | |
1397 | report_file_error ("Creating pipe", Qnil); | |
1398 | } | |
d0d6b7c5 JB |
1399 | outchannel = sv[1]; |
1400 | forkin = sv[0]; | |
1401 | } | |
1402 | #endif /* not SKTPAIR */ | |
1403 | ||
1404 | #if 0 | |
1405 | /* Replaced by close_process_descs */ | |
1406 | set_exclusive_use (inchannel); | |
1407 | set_exclusive_use (outchannel); | |
1408 | #endif | |
1409 | ||
1410 | /* Stride people say it's a mystery why this is needed | |
1411 | as well as the O_NDELAY, but that it fails without this. */ | |
1412 | #if defined (STRIDE) || (defined (pfa) && defined (HAVE_PTYS)) | |
1413 | { | |
1414 | int one = 1; | |
1415 | ioctl (inchannel, FIONBIO, &one); | |
1416 | } | |
1417 | #endif | |
1418 | ||
1419 | #ifdef O_NONBLOCK | |
1420 | fcntl (inchannel, F_SETFL, O_NONBLOCK); | |
03832893 | 1421 | fcntl (outchannel, F_SETFL, O_NONBLOCK); |
d0d6b7c5 JB |
1422 | #else |
1423 | #ifdef O_NDELAY | |
1424 | fcntl (inchannel, F_SETFL, O_NDELAY); | |
03832893 | 1425 | fcntl (outchannel, F_SETFL, O_NDELAY); |
d0d6b7c5 JB |
1426 | #endif |
1427 | #endif | |
1428 | ||
1429 | /* Record this as an active process, with its channels. | |
1430 | As a result, child_setup will close Emacs's side of the pipes. */ | |
1431 | chan_process[inchannel] = process; | |
1d056e64 KH |
1432 | XSETINT (XPROCESS (process)->infd, inchannel); |
1433 | XSETINT (XPROCESS (process)->outfd, outchannel); | |
d0d6b7c5 JB |
1434 | /* Record the tty descriptor used in the subprocess. */ |
1435 | if (forkin < 0) | |
1436 | XPROCESS (process)->subtty = Qnil; | |
1437 | else | |
22719df2 | 1438 | XSETFASTINT (XPROCESS (process)->subtty, forkin); |
d0d6b7c5 JB |
1439 | XPROCESS (process)->pty_flag = (pty_flag ? Qt : Qnil); |
1440 | XPROCESS (process)->status = Qrun; | |
c7580538 KH |
1441 | if (!proc_decode_coding_system[inchannel]) |
1442 | proc_decode_coding_system[inchannel] | |
1443 | = (struct coding_system *) xmalloc (sizeof (struct coding_system)); | |
0fa1789e | 1444 | setup_coding_system (XPROCESS (process)->decode_coding_system, |
c7580538 KH |
1445 | proc_decode_coding_system[inchannel]); |
1446 | if (!proc_encode_coding_system[outchannel]) | |
929a6726 RS |
1447 | proc_encode_coding_system[outchannel] |
1448 | = (struct coding_system *) xmalloc (sizeof (struct coding_system)); | |
0fa1789e | 1449 | setup_coding_system (XPROCESS (process)->encode_coding_system, |
c7580538 | 1450 | proc_encode_coding_system[outchannel]); |
d0d6b7c5 | 1451 | |
41d03b9a | 1452 | if ((!NILP (buffer) && NILP (XBUFFER (buffer)->enable_multibyte_characters)) |
d5d4ae71 KH |
1453 | || (NILP (buffer) && NILP (buffer_defaults.enable_multibyte_characters))) |
1454 | { | |
1455 | /* In unibyte mode, character code conversion should not take | |
1456 | place but EOL conversion should. So, setup raw-text or one | |
1457 | of the subsidiary according to the information just setup. */ | |
10af5b4c | 1458 | if (!NILP (XPROCESS (process)->decode_coding_system)) |
d5d4ae71 | 1459 | setup_raw_text_coding_system (proc_decode_coding_system[inchannel]); |
10af5b4c | 1460 | if (!NILP (XPROCESS (process)->encode_coding_system)) |
7c5e21ab | 1461 | setup_raw_text_coding_system (proc_encode_coding_system[outchannel]); |
d5d4ae71 KH |
1462 | } |
1463 | ||
1a283a4c KH |
1464 | if (CODING_REQUIRE_ENCODING (proc_encode_coding_system[outchannel])) |
1465 | { | |
1466 | /* Here we encode arguments by the coding system used for | |
1467 | sending data to the process. We don't support using | |
1468 | different coding systems for encoding arguments and for | |
1469 | encoding data sent to the process. */ | |
1470 | struct gcpro gcpro1; | |
1471 | int i = 1; | |
1472 | struct coding_system *coding = proc_encode_coding_system[outchannel]; | |
1473 | ||
e7fbaa65 | 1474 | coding->mode |= CODING_MODE_LAST_BLOCK; |
1a283a4c KH |
1475 | GCPRO1 (process); |
1476 | while (new_argv[i] != 0) | |
1477 | { | |
1478 | int len = strlen (new_argv[i]); | |
1479 | int size = encoding_buffer_size (coding, len); | |
1480 | unsigned char *buf = (unsigned char *) alloca (size); | |
1a283a4c | 1481 | |
833d591d | 1482 | encode_coding (coding, (unsigned char *)new_argv[i], buf, len, size); |
e7fbaa65 | 1483 | buf[coding->produced] = 0; |
1a283a4c KH |
1484 | /* We don't have to free new_argv[i] because it points to a |
1485 | Lisp string given as an argument to `start-process'. */ | |
833d591d | 1486 | new_argv[i++] = (char *) buf; |
1a283a4c KH |
1487 | } |
1488 | UNGCPRO; | |
e7fbaa65 | 1489 | coding->mode &= ~CODING_MODE_LAST_BLOCK; |
1a283a4c KH |
1490 | } |
1491 | ||
d0d6b7c5 JB |
1492 | /* Delay interrupts until we have a chance to store |
1493 | the new fork's pid in its process structure */ | |
0dc70c33 KH |
1494 | #ifdef POSIX_SIGNALS |
1495 | sigemptyset (&blocked); | |
1496 | #ifdef SIGCHLD | |
1497 | sigaddset (&blocked, SIGCHLD); | |
1498 | #endif | |
1499 | #ifdef HAVE_VFORK | |
1500 | /* On many hosts (e.g. Solaris 2.4), if a vforked child calls `signal', | |
1501 | this sets the parent's signal handlers as well as the child's. | |
1502 | So delay all interrupts whose handlers the child might munge, | |
1503 | and record the current handlers so they can be restored later. */ | |
1504 | sigaddset (&blocked, SIGINT ); sigaction (SIGINT , 0, &sigint_action ); | |
1505 | sigaddset (&blocked, SIGQUIT); sigaction (SIGQUIT, 0, &sigquit_action); | |
1506 | #ifdef AIX | |
1507 | sigaddset (&blocked, SIGHUP ); sigaction (SIGHUP , 0, &sighup_action ); | |
1508 | #endif | |
1509 | #endif /* HAVE_VFORK */ | |
1510 | sigprocmask (SIG_BLOCK, &blocked, &procmask); | |
1511 | #else /* !POSIX_SIGNALS */ | |
d0d6b7c5 JB |
1512 | #ifdef SIGCHLD |
1513 | #ifdef BSD4_1 | |
1514 | sighold (SIGCHLD); | |
1515 | #else /* not BSD4_1 */ | |
6df54671 | 1516 | #if defined (BSD_SYSTEM) || defined (UNIPLUS) || defined (HPUX) |
d0d6b7c5 JB |
1517 | sigsetmask (sigmask (SIGCHLD)); |
1518 | #else /* ordinary USG */ | |
1519 | #if 0 | |
1520 | sigchld_deferred = 0; | |
1521 | sigchld = signal (SIGCHLD, create_process_sigchld); | |
1522 | #endif | |
1523 | #endif /* ordinary USG */ | |
1524 | #endif /* not BSD4_1 */ | |
1525 | #endif /* SIGCHLD */ | |
0dc70c33 | 1526 | #endif /* !POSIX_SIGNALS */ |
d0d6b7c5 | 1527 | |
3081bf8d | 1528 | FD_SET (inchannel, &input_wait_mask); |
a69281ff | 1529 | FD_SET (inchannel, &non_keyboard_wait_mask); |
3081bf8d KH |
1530 | if (inchannel > max_process_desc) |
1531 | max_process_desc = inchannel; | |
1532 | ||
d0d6b7c5 JB |
1533 | /* Until we store the proper pid, enable sigchld_handler |
1534 | to recognize an unknown pid as standing for this process. | |
1535 | It is very important not to let this `marker' value stay | |
1536 | in the table after this function has returned; if it does | |
1537 | it might cause call-process to hang and subsequent asynchronous | |
1538 | processes to get their return values scrambled. */ | |
1539 | XSETINT (XPROCESS (process)->pid, -1); | |
1540 | ||
ececcbec RS |
1541 | BLOCK_INPUT; |
1542 | ||
d0d6b7c5 JB |
1543 | { |
1544 | /* child_setup must clobber environ on systems with true vfork. | |
1545 | Protect it from permanent change. */ | |
1546 | char **save_environ = environ; | |
1547 | ||
14dc6093 | 1548 | current_dir = ENCODE_FILE (current_dir); |
a932f187 | 1549 | |
e98d950b | 1550 | #ifndef WINDOWSNT |
d0d6b7c5 JB |
1551 | pid = vfork (); |
1552 | if (pid == 0) | |
e98d950b | 1553 | #endif /* not WINDOWSNT */ |
d0d6b7c5 JB |
1554 | { |
1555 | int xforkin = forkin; | |
1556 | int xforkout = forkout; | |
1557 | ||
1558 | #if 0 /* This was probably a mistake--it duplicates code later on, | |
1559 | but fails to handle all the cases. */ | |
1560 | /* Make sure SIGCHLD is not blocked in the child. */ | |
1561 | sigsetmask (SIGEMPTYMASK); | |
1562 | #endif | |
1563 | ||
1564 | /* Make the pty be the controlling terminal of the process. */ | |
1565 | #ifdef HAVE_PTYS | |
1566 | /* First, disconnect its current controlling terminal. */ | |
1567 | #ifdef HAVE_SETSID | |
7ce48618 RS |
1568 | /* We tried doing setsid only if pty_flag, but it caused |
1569 | process_set_signal to fail on SGI when using a pipe. */ | |
1570 | setsid (); | |
ce4c9c90 | 1571 | /* Make the pty's terminal the controlling terminal. */ |
084fd64a | 1572 | if (pty_flag) |
39e9ebcd | 1573 | { |
39e9ebcd RS |
1574 | #ifdef TIOCSCTTY |
1575 | /* We ignore the return value | |
1576 | because faith@cs.unc.edu says that is necessary on Linux. */ | |
1577 | ioctl (xforkin, TIOCSCTTY, 0); | |
ce4c9c90 | 1578 | #endif |
39e9ebcd | 1579 | } |
d0d6b7c5 | 1580 | #else /* not HAVE_SETSID */ |
c14e53a4 | 1581 | #ifdef USG |
000ab717 | 1582 | /* It's very important to call setpgrp here and no time |
d0d6b7c5 JB |
1583 | afterwards. Otherwise, we lose our controlling tty which |
1584 | is set when we open the pty. */ | |
1585 | setpgrp (); | |
1586 | #endif /* USG */ | |
1587 | #endif /* not HAVE_SETSID */ | |
9bcf8ec6 KH |
1588 | #if defined (HAVE_TERMIOS) && defined (LDISC1) |
1589 | if (pty_flag && xforkin >= 0) | |
1590 | { | |
1591 | struct termios t; | |
1592 | tcgetattr (xforkin, &t); | |
1593 | t.c_lflag = LDISC1; | |
1594 | if (tcsetattr (xforkin, TCSANOW, &t) < 0) | |
1595 | write (1, "create_process/tcsetattr LDISC1 failed\n", 39); | |
1596 | } | |
1597 | #else | |
aafadd9f | 1598 | #if defined (NTTYDISC) && defined (TIOCSETD) |
ff773a4e | 1599 | if (pty_flag && xforkin >= 0) |
afc549fd RS |
1600 | { |
1601 | /* Use new line discipline. */ | |
1602 | int ldisc = NTTYDISC; | |
4458f555 | 1603 | ioctl (xforkin, TIOCSETD, &ldisc); |
afc549fd | 1604 | } |
000ab717 | 1605 | #endif |
9bcf8ec6 | 1606 | #endif |
d0d6b7c5 JB |
1607 | #ifdef TIOCNOTTY |
1608 | /* In 4.3BSD, the TIOCSPGRP bug has been fixed, and now you | |
1609 | can do TIOCSPGRP only to the process's controlling tty. */ | |
1610 | if (pty_flag) | |
1611 | { | |
1612 | /* I wonder: would just ioctl (0, TIOCNOTTY, 0) work here? | |
1613 | I can't test it since I don't have 4.3. */ | |
1614 | int j = open ("/dev/tty", O_RDWR, 0); | |
1615 | ioctl (j, TIOCNOTTY, 0); | |
1616 | close (j); | |
5a570e37 | 1617 | #ifndef USG |
d0d6b7c5 JB |
1618 | /* In order to get a controlling terminal on some versions |
1619 | of BSD, it is necessary to put the process in pgrp 0 | |
1620 | before it opens the terminal. */ | |
99c1aeca | 1621 | #ifdef HAVE_SETPGID |
3ea1d291 RS |
1622 | setpgid (0, 0); |
1623 | #else | |
d0d6b7c5 | 1624 | setpgrp (0, 0); |
3ea1d291 | 1625 | #endif |
d0d6b7c5 JB |
1626 | #endif |
1627 | } | |
1628 | #endif /* TIOCNOTTY */ | |
1629 | ||
99153b9e | 1630 | #if !defined (RTU) && !defined (UNIPLUS) && !defined (DONT_REOPEN_PTY) |
d0d6b7c5 | 1631 | /*** There is a suggestion that this ought to be a |
99153b9e RS |
1632 | conditional on TIOCSPGRP, |
1633 | or !(defined (HAVE_SETSID) && defined (TIOCSCTTY)). | |
1634 | Trying the latter gave the wrong results on Debian GNU/Linux 1.1; | |
1635 | that system does seem to need this code, even though | |
1636 | both HAVE_SETSID and TIOCSCTTY are defined. */ | |
d0d6b7c5 JB |
1637 | /* Now close the pty (if we had it open) and reopen it. |
1638 | This makes the pty the controlling terminal of the subprocess. */ | |
1639 | if (pty_flag) | |
1640 | { | |
99e3d726 RS |
1641 | #ifdef SET_CHILD_PTY_PGRP |
1642 | int pgrp = getpid (); | |
1643 | #endif | |
1644 | ||
d0d6b7c5 JB |
1645 | /* I wonder if close (open (pty_name, ...)) would work? */ |
1646 | if (xforkin >= 0) | |
1647 | close (xforkin); | |
1648 | xforkout = xforkin = open (pty_name, O_RDWR, 0); | |
1649 | ||
4aa54ba8 RS |
1650 | if (xforkin < 0) |
1651 | { | |
1652 | write (1, "Couldn't open the pty terminal ", 31); | |
1653 | write (1, pty_name, strlen (pty_name)); | |
1654 | write (1, "\n", 1); | |
1655 | _exit (1); | |
1656 | } | |
1657 | ||
99e3d726 RS |
1658 | #ifdef SET_CHILD_PTY_PGRP |
1659 | ioctl (xforkin, TIOCSPGRP, &pgrp); | |
1660 | ioctl (xforkout, TIOCSPGRP, &pgrp); | |
1661 | #endif | |
d0d6b7c5 | 1662 | } |
99153b9e | 1663 | #endif /* not UNIPLUS and not RTU and not DONT_REOPEN_PTY */ |
e9bf058b | 1664 | |
d0d6b7c5 | 1665 | #ifdef SETUP_SLAVE_PTY |
13a72104 RS |
1666 | if (pty_flag) |
1667 | { | |
1668 | SETUP_SLAVE_PTY; | |
1669 | } | |
d0d6b7c5 JB |
1670 | #endif /* SETUP_SLAVE_PTY */ |
1671 | #ifdef AIX | |
1672 | /* On AIX, we've disabled SIGHUP above once we start a child on a pty. | |
1673 | Now reenable it in the child, so it will die when we want it to. */ | |
1674 | if (pty_flag) | |
1675 | signal (SIGHUP, SIG_DFL); | |
1676 | #endif | |
1677 | #endif /* HAVE_PTYS */ | |
1678 | ||
0dc70c33 KH |
1679 | signal (SIGINT, SIG_DFL); |
1680 | signal (SIGQUIT, SIG_DFL); | |
1681 | ||
1682 | /* Stop blocking signals in the child. */ | |
1683 | #ifdef POSIX_SIGNALS | |
1684 | sigprocmask (SIG_SETMASK, &procmask, 0); | |
1685 | #else /* !POSIX_SIGNALS */ | |
d0d6b7c5 JB |
1686 | #ifdef SIGCHLD |
1687 | #ifdef BSD4_1 | |
1688 | sigrelse (SIGCHLD); | |
1689 | #else /* not BSD4_1 */ | |
6df54671 | 1690 | #if defined (BSD_SYSTEM) || defined (UNIPLUS) || defined (HPUX) |
d0d6b7c5 JB |
1691 | sigsetmask (SIGEMPTYMASK); |
1692 | #else /* ordinary USG */ | |
63528b78 | 1693 | #if 0 |
d0d6b7c5 | 1694 | signal (SIGCHLD, sigchld); |
63528b78 | 1695 | #endif |
d0d6b7c5 JB |
1696 | #endif /* ordinary USG */ |
1697 | #endif /* not BSD4_1 */ | |
1698 | #endif /* SIGCHLD */ | |
0dc70c33 | 1699 | #endif /* !POSIX_SIGNALS */ |
5e7e1da2 | 1700 | |
ab01d0a8 RS |
1701 | if (pty_flag) |
1702 | child_setup_tty (xforkout); | |
e98d950b RS |
1703 | #ifdef WINDOWSNT |
1704 | pid = child_setup (xforkin, xforkout, xforkout, | |
1705 | new_argv, 1, current_dir); | |
1706 | #else /* not WINDOWSNT */ | |
d0d6b7c5 | 1707 | child_setup (xforkin, xforkout, xforkout, |
e065a56e | 1708 | new_argv, 1, current_dir); |
e98d950b | 1709 | #endif /* not WINDOWSNT */ |
d0d6b7c5 JB |
1710 | } |
1711 | environ = save_environ; | |
1712 | } | |
1713 | ||
ececcbec RS |
1714 | UNBLOCK_INPUT; |
1715 | ||
4a127b3b | 1716 | /* This runs in the Emacs process. */ |
d0d6b7c5 | 1717 | if (pid < 0) |
6311cf58 RS |
1718 | { |
1719 | if (forkin >= 0) | |
1720 | close (forkin); | |
1721 | if (forkin != forkout && forkout >= 0) | |
1722 | close (forkout); | |
6311cf58 | 1723 | } |
4a127b3b KH |
1724 | else |
1725 | { | |
1726 | /* vfork succeeded. */ | |
1727 | XSETFASTINT (XPROCESS (process)->pid, pid); | |
d0d6b7c5 | 1728 | |
e98d950b | 1729 | #ifdef WINDOWSNT |
4a127b3b | 1730 | register_child (pid, inchannel); |
e98d950b RS |
1731 | #endif /* WINDOWSNT */ |
1732 | ||
4a127b3b KH |
1733 | /* If the subfork execv fails, and it exits, |
1734 | this close hangs. I don't know why. | |
1735 | So have an interrupt jar it loose. */ | |
1736 | stop_polling (); | |
1737 | signal (SIGALRM, create_process_1); | |
1738 | alarm (1); | |
1739 | XPROCESS (process)->subtty = Qnil; | |
1740 | if (forkin >= 0) | |
1741 | close (forkin); | |
1742 | alarm (0); | |
1743 | start_polling (); | |
1744 | if (forkin != forkout && forkout >= 0) | |
1745 | close (forkout); | |
d0d6b7c5 | 1746 | |
875e6b94 | 1747 | #ifdef HAVE_PTYS |
4a127b3b KH |
1748 | if (pty_flag) |
1749 | XPROCESS (process)->tty_name = build_string (pty_name); | |
1750 | else | |
875e6b94 | 1751 | #endif |
4a127b3b KH |
1752 | XPROCESS (process)->tty_name = Qnil; |
1753 | } | |
3b9a3dfa | 1754 | |
4a127b3b KH |
1755 | /* Restore the signal state whether vfork succeeded or not. |
1756 | (We will signal an error, below, if it failed.) */ | |
0dc70c33 KH |
1757 | #ifdef POSIX_SIGNALS |
1758 | #ifdef HAVE_VFORK | |
1759 | /* Restore the parent's signal handlers. */ | |
1760 | sigaction (SIGINT, &sigint_action, 0); | |
1761 | sigaction (SIGQUIT, &sigquit_action, 0); | |
1762 | #ifdef AIX | |
1763 | sigaction (SIGHUP, &sighup_action, 0); | |
1764 | #endif | |
1765 | #endif /* HAVE_VFORK */ | |
1766 | /* Stop blocking signals in the parent. */ | |
1767 | sigprocmask (SIG_SETMASK, &procmask, 0); | |
1768 | #else /* !POSIX_SIGNALS */ | |
d0d6b7c5 JB |
1769 | #ifdef SIGCHLD |
1770 | #ifdef BSD4_1 | |
1771 | sigrelse (SIGCHLD); | |
1772 | #else /* not BSD4_1 */ | |
6df54671 | 1773 | #if defined (BSD_SYSTEM) || defined (UNIPLUS) || defined (HPUX) |
d0d6b7c5 JB |
1774 | sigsetmask (SIGEMPTYMASK); |
1775 | #else /* ordinary USG */ | |
1776 | #if 0 | |
1777 | signal (SIGCHLD, sigchld); | |
1778 | /* Now really handle any of these signals | |
1779 | that came in during this function. */ | |
1780 | if (sigchld_deferred) | |
1781 | kill (getpid (), SIGCHLD); | |
1782 | #endif | |
1783 | #endif /* ordinary USG */ | |
1784 | #endif /* not BSD4_1 */ | |
1785 | #endif /* SIGCHLD */ | |
0dc70c33 | 1786 | #endif /* !POSIX_SIGNALS */ |
4a127b3b KH |
1787 | |
1788 | /* Now generate the error if vfork failed. */ | |
1789 | if (pid < 0) | |
1790 | report_file_error ("Doing vfork", Qnil); | |
d0d6b7c5 JB |
1791 | } |
1792 | #endif /* not VMS */ | |
1793 | ||
1794 | #ifdef HAVE_SOCKETS | |
1795 | ||
1796 | /* open a TCP network connection to a given HOST/SERVICE. Treated | |
1797 | exactly like a normal process when reading and writing. Only | |
1798 | differences are in status display and process deletion. A network | |
1799 | connection has no PID; you cannot signal it. All you can do is | |
1800 | deactivate and close it via delete-process */ | |
1801 | ||
1802 | DEFUN ("open-network-stream", Fopen_network_stream, Sopen_network_stream, | |
1803 | 4, 4, 0, | |
1804 | "Open a TCP connection for a service to a host.\n\ | |
1805 | Returns a subprocess-object to represent the connection.\n\ | |
1806 | Input and output work as for subprocesses; `delete-process' closes it.\n\ | |
1807 | Args are NAME BUFFER HOST SERVICE.\n\ | |
1808 | NAME is name for process. It is modified if necessary to make it unique.\n\ | |
1809 | BUFFER is the buffer (or buffer-name) to associate with the process.\n\ | |
1810 | Process output goes at end of that buffer, unless you specify\n\ | |
1811 | an output stream or filter function to handle the output.\n\ | |
1812 | BUFFER may be also nil, meaning that this process is not associated\n\ | |
1813 | with any buffer\n\ | |
1814 | Third arg is name of the host to connect to, or its IP address.\n\ | |
1815 | Fourth arg SERVICE is name of the service desired, or an integer\n\ | |
1816 | specifying a port number to connect to.") | |
1817 | (name, buffer, host, service) | |
1818 | Lisp_Object name, buffer, host, service; | |
1819 | { | |
1820 | Lisp_Object proc; | |
a319f7c1 | 1821 | #ifndef HAVE_GETADDRINFO |
d0d6b7c5 JB |
1822 | struct sockaddr_in address; |
1823 | struct servent *svc_info; | |
1824 | struct hostent *host_info_ptr, host_info; | |
1825 | char *(addr_list[2]); | |
79967d5e | 1826 | IN_ADDR numeric_addr; |
a319f7c1 | 1827 | int port; |
418b48fd | 1828 | #else /* HAVE_GETADDRINFO */ |
a319f7c1 KH |
1829 | struct addrinfo hints, *res, *lres; |
1830 | int ret = 0; | |
1831 | int xerrno = 0; | |
418b48fd KH |
1832 | char *portstring, portbuf[128]; |
1833 | #endif /* HAVE_GETADDRINFO */ | |
1834 | int s = -1, outch, inch; | |
d0d6b7c5 | 1835 | struct gcpro gcpro1, gcpro2, gcpro3, gcpro4; |
e333e864 | 1836 | int retry = 0; |
44ade2e9 | 1837 | int count = specpdl_ptr - specpdl; |
5684cd6e | 1838 | int count1; |
d0d6b7c5 | 1839 | |
bff3ed0a RS |
1840 | #ifdef WINDOWSNT |
1841 | /* Ensure socket support is loaded if available. */ | |
1842 | init_winsock (TRUE); | |
1843 | #endif | |
1844 | ||
d0d6b7c5 JB |
1845 | GCPRO4 (name, buffer, host, service); |
1846 | CHECK_STRING (name, 0); | |
1847 | CHECK_STRING (host, 0); | |
a319f7c1 KH |
1848 | |
1849 | #ifdef HAVE_GETADDRINFO | |
1850 | /* | |
1851 | * SERVICE can either be a string or int. | |
1852 | * Convert to a C string for later use by getaddrinfo. | |
1853 | */ | |
1854 | if (INTEGERP (service)) | |
1855 | { | |
1856 | sprintf (portbuf, "%d", XINT (service)); | |
1857 | portstring = portbuf; | |
1858 | } | |
1859 | else | |
1860 | { | |
1861 | CHECK_STRING (service, 0); | |
1862 | portstring = XSTRING (service)->data; | |
1863 | } | |
1864 | #else /* ! HAVE_GETADDRINFO */ | |
bcd69aea | 1865 | if (INTEGERP (service)) |
d0d6b7c5 JB |
1866 | port = htons ((unsigned short) XINT (service)); |
1867 | else | |
1868 | { | |
1869 | CHECK_STRING (service, 0); | |
1870 | svc_info = getservbyname (XSTRING (service)->data, "tcp"); | |
1871 | if (svc_info == 0) | |
1872 | error ("Unknown service \"%s\"", XSTRING (service)->data); | |
1873 | port = svc_info->s_port; | |
1874 | } | |
a319f7c1 KH |
1875 | #endif /* ! HAVE_GETADDRINFO */ |
1876 | ||
d0d6b7c5 | 1877 | |
798b64bb KH |
1878 | /* Slow down polling to every ten seconds. |
1879 | Some kernels have a bug which causes retrying connect to fail | |
1880 | after a connect. Polling can interfere with gethostbyname too. */ | |
1881 | #ifdef POLL_FOR_INPUT | |
1882 | bind_polling_period (10); | |
1883 | #endif | |
1884 | ||
1d2c16fa | 1885 | #ifndef TERM |
a319f7c1 KH |
1886 | #ifdef HAVE_GETADDRINFO |
1887 | { | |
1888 | immediate_quit = 1; | |
1889 | QUIT; | |
1890 | memset (&hints, 0, sizeof (hints)); | |
418b48fd | 1891 | hints.ai_flags = 0; |
a319f7c1 KH |
1892 | hints.ai_family = AF_UNSPEC; |
1893 | hints.ai_socktype = SOCK_STREAM; | |
1894 | hints.ai_protocol = 0; | |
1895 | ret = getaddrinfo (XSTRING (host)->data, portstring, &hints, &res); | |
a319f7c1 KH |
1896 | if (ret) |
1897 | { | |
1898 | error ("%s/%s %s", XSTRING (host)->data, portstring, | |
1db972cb | 1899 | strerror (ret)); |
a319f7c1 KH |
1900 | } |
1901 | immediate_quit = 0; | |
1902 | } | |
1903 | ||
5684cd6e AS |
1904 | s = -1; |
1905 | count1 = specpdl_ptr - specpdl; | |
1906 | record_unwind_protect (close_file_unwind, make_number (s)); | |
1907 | ||
418b48fd | 1908 | for (lres = res; lres; lres = lres->ai_next) |
a319f7c1 KH |
1909 | { |
1910 | s = socket (lres->ai_family, lres->ai_socktype, lres->ai_protocol); | |
1911 | if (s < 0) | |
418b48fd | 1912 | continue; |
a319f7c1 KH |
1913 | |
1914 | /* Kernel bugs (on Ultrix at least) cause lossage (not just EINTR) | |
1915 | when connect is interrupted. So let's not let it get interrupted. | |
1916 | Note we do not turn off polling, because polling is only used | |
1917 | when not interrupt_input, and thus not normally used on the systems | |
1918 | which have this bug. On systems which use polling, there's no way | |
1919 | to quit if polling is turned off. */ | |
1920 | if (interrupt_input) | |
1921 | unrequest_sigio (); | |
1922 | ||
a319f7c1 KH |
1923 | immediate_quit = 1; |
1924 | QUIT; | |
1925 | ||
1926 | ret = connect (s, lres->ai_addr, lres->ai_addrlen); | |
418b48fd | 1927 | if (ret == 0) |
a319f7c1 | 1928 | break; |
418b48fd KH |
1929 | close (s); |
1930 | s = -1; | |
1931 | } | |
1932 | ||
a319f7c1 | 1933 | freeaddrinfo (res); |
418b48fd | 1934 | if (s < 0) |
a319f7c1 KH |
1935 | { |
1936 | if (interrupt_input) | |
1937 | request_sigio (); | |
1938 | ||
1939 | errno = xerrno; | |
1940 | report_file_error ("connection failed", | |
1941 | Fcons (host, Fcons (name, Qnil))); | |
1942 | } | |
1943 | #else /* ! HAVE_GETADDRINFO */ | |
1944 | ||
616da37c RS |
1945 | while (1) |
1946 | { | |
5f0929a7 RS |
1947 | #ifdef TRY_AGAIN |
1948 | h_errno = 0; | |
1949 | #endif | |
5d6c2aa3 RS |
1950 | immediate_quit = 1; |
1951 | QUIT; | |
616da37c | 1952 | host_info_ptr = gethostbyname (XSTRING (host)->data); |
5d6c2aa3 | 1953 | immediate_quit = 0; |
616da37c RS |
1954 | #ifdef TRY_AGAIN |
1955 | if (! (host_info_ptr == 0 && h_errno == TRY_AGAIN)) | |
1956 | #endif | |
1957 | break; | |
1958 | Fsleep_for (make_number (1), Qnil); | |
1959 | } | |
d0d6b7c5 JB |
1960 | if (host_info_ptr == 0) |
1961 | /* Attempt to interpret host as numeric inet address */ | |
1962 | { | |
393a9679 | 1963 | numeric_addr = inet_addr ((char *) XSTRING (host)->data); |
79967d5e | 1964 | if (NUMERIC_ADDR_ERROR) |
d0d6b7c5 JB |
1965 | error ("Unknown host \"%s\"", XSTRING (host)->data); |
1966 | ||
1967 | host_info_ptr = &host_info; | |
1968 | host_info.h_name = 0; | |
1969 | host_info.h_aliases = 0; | |
1970 | host_info.h_addrtype = AF_INET; | |
39a21be6 JB |
1971 | #ifdef h_addr |
1972 | /* Older machines have only one address slot called h_addr. | |
1973 | Newer machines have h_addr_list, but #define h_addr to | |
1974 | be its first element. */ | |
1975 | host_info.h_addr_list = &(addr_list[0]); | |
1976 | #endif | |
1977 | host_info.h_addr = (char*)(&numeric_addr); | |
d0d6b7c5 | 1978 | addr_list[1] = 0; |
8777fbe2 RS |
1979 | /* numeric_addr isn't null-terminated; it has fixed length. */ |
1980 | host_info.h_length = sizeof (numeric_addr); | |
d0d6b7c5 JB |
1981 | } |
1982 | ||
1983 | bzero (&address, sizeof address); | |
1984 | bcopy (host_info_ptr->h_addr, (char *) &address.sin_addr, | |
1985 | host_info_ptr->h_length); | |
1986 | address.sin_family = host_info_ptr->h_addrtype; | |
1987 | address.sin_port = port; | |
1988 | ||
1989 | s = socket (host_info_ptr->h_addrtype, SOCK_STREAM, 0); | |
1990 | if (s < 0) | |
1991 | report_file_error ("error creating socket", Fcons (name, Qnil)); | |
1992 | ||
5684cd6e AS |
1993 | count1 = specpdl_ptr - specpdl; |
1994 | record_unwind_protect (close_file_unwind, make_number (s)); | |
1995 | ||
457a9bee RS |
1996 | /* Kernel bugs (on Ultrix at least) cause lossage (not just EINTR) |
1997 | when connect is interrupted. So let's not let it get interrupted. | |
1998 | Note we do not turn off polling, because polling is only used | |
1999 | when not interrupt_input, and thus not normally used on the systems | |
2000 | which have this bug. On systems which use polling, there's no way | |
2001 | to quit if polling is turned off. */ | |
2002 | if (interrupt_input) | |
2003 | unrequest_sigio (); | |
2004 | ||
d0d6b7c5 | 2005 | loop: |
0f2ee0c1 RS |
2006 | |
2007 | immediate_quit = 1; | |
2008 | QUIT; | |
2009 | ||
e333e864 RS |
2010 | if (connect (s, (struct sockaddr *) &address, sizeof address) == -1 |
2011 | && errno != EISCONN) | |
d0d6b7c5 JB |
2012 | { |
2013 | int xerrno = errno; | |
e333e864 | 2014 | |
0f2ee0c1 RS |
2015 | immediate_quit = 0; |
2016 | ||
d0d6b7c5 JB |
2017 | if (errno == EINTR) |
2018 | goto loop; | |
e333e864 RS |
2019 | if (errno == EADDRINUSE && retry < 20) |
2020 | { | |
4590788a RS |
2021 | /* A delay here is needed on some FreeBSD systems, |
2022 | and it is harmless, since this retrying takes time anyway | |
2023 | and should be infrequent. */ | |
2024 | Fsleep_for (make_number (1), Qnil); | |
e333e864 RS |
2025 | retry++; |
2026 | goto loop; | |
2027 | } | |
2028 | ||
5684cd6e AS |
2029 | /* Discard the unwind protect. */ |
2030 | specpdl_ptr = specpdl + count1; | |
2031 | ||
d0d6b7c5 | 2032 | close (s); |
457a9bee RS |
2033 | |
2034 | if (interrupt_input) | |
2035 | request_sigio (); | |
2036 | ||
d0d6b7c5 JB |
2037 | errno = xerrno; |
2038 | report_file_error ("connection failed", | |
2039 | Fcons (host, Fcons (name, Qnil))); | |
2040 | } | |
a319f7c1 | 2041 | #endif /* ! HAVE_GETADDRINFO */ |
457a9bee | 2042 | |
0f2ee0c1 RS |
2043 | immediate_quit = 0; |
2044 | ||
5684cd6e AS |
2045 | /* Discard the unwind protect. */ |
2046 | specpdl_ptr = specpdl + count1; | |
2047 | ||
44ade2e9 RS |
2048 | #ifdef POLL_FOR_INPUT |
2049 | unbind_to (count, Qnil); | |
2050 | #endif | |
2051 | ||
457a9bee RS |
2052 | if (interrupt_input) |
2053 | request_sigio (); | |
2054 | ||
1d2c16fa RS |
2055 | #else /* TERM */ |
2056 | s = connect_server (0); | |
2057 | if (s < 0) | |
2058 | report_file_error ("error creating socket", Fcons (name, Qnil)); | |
2059 | send_command (s, C_PORT, 0, "%s:%d", XSTRING (host)->data, ntohs (port)); | |
2060 | send_command (s, C_DUMB, 1, 0); | |
2061 | #endif /* TERM */ | |
d0d6b7c5 JB |
2062 | |
2063 | inch = s; | |
59f23005 | 2064 | outch = s; |
d0d6b7c5 JB |
2065 | |
2066 | if (!NILP (buffer)) | |
2067 | buffer = Fget_buffer_create (buffer); | |
2068 | proc = make_process (name); | |
2069 | ||
2070 | chan_process[inch] = proc; | |
2071 | ||
2072 | #ifdef O_NONBLOCK | |
2073 | fcntl (inch, F_SETFL, O_NONBLOCK); | |
2074 | #else | |
2075 | #ifdef O_NDELAY | |
2076 | fcntl (inch, F_SETFL, O_NDELAY); | |
2077 | #endif | |
2078 | #endif | |
2079 | ||
de282a05 | 2080 | XPROCESS (proc)->childp = Fcons (host, Fcons (service, Qnil)); |
d0d6b7c5 JB |
2081 | XPROCESS (proc)->command_channel_p = Qnil; |
2082 | XPROCESS (proc)->buffer = buffer; | |
2083 | XPROCESS (proc)->sentinel = Qnil; | |
2084 | XPROCESS (proc)->filter = Qnil; | |
2085 | XPROCESS (proc)->command = Qnil; | |
2086 | XPROCESS (proc)->pid = Qnil; | |
7795ff9b | 2087 | XSETINT (XPROCESS (proc)->infd, inch); |
1d056e64 | 2088 | XSETINT (XPROCESS (proc)->outfd, outch); |
d0d6b7c5 JB |
2089 | XPROCESS (proc)->status = Qrun; |
2090 | FD_SET (inch, &input_wait_mask); | |
a69281ff | 2091 | FD_SET (inch, &non_keyboard_wait_mask); |
7d0e672e RS |
2092 | if (inch > max_process_desc) |
2093 | max_process_desc = inch; | |
d0d6b7c5 | 2094 | |
67918941 RS |
2095 | { |
2096 | /* Setup coding systems for communicating with the network stream. */ | |
2097 | struct gcpro gcpro1; | |
2098 | /* Qt denotes we have not yet called Ffind_operation_coding_system. */ | |
2099 | Lisp_Object coding_systems = Qt; | |
2100 | Lisp_Object args[5], val; | |
2101 | ||
2102 | if (!NILP (Vcoding_system_for_read)) | |
2103 | val = Vcoding_system_for_read; | |
41d03b9a GM |
2104 | else if ((!NILP (buffer) && NILP (XBUFFER (buffer)->enable_multibyte_characters)) |
2105 | || (NILP (buffer) && NILP (buffer_defaults.enable_multibyte_characters))) | |
67918941 RS |
2106 | /* We dare not decode end-of-line format by setting VAL to |
2107 | Qraw_text, because the existing Emacs Lisp libraries | |
2108 | assume that they receive bare code including a sequene of | |
2109 | CR LF. */ | |
2110 | val = Qnil; | |
2111 | else | |
2112 | { | |
2113 | args[0] = Qopen_network_stream, args[1] = name, | |
2114 | args[2] = buffer, args[3] = host, args[4] = service; | |
2115 | GCPRO1 (proc); | |
2116 | coding_systems = Ffind_operation_coding_system (5, args); | |
2117 | UNGCPRO; | |
2118 | if (CONSP (coding_systems)) | |
70949dac | 2119 | val = XCAR (coding_systems); |
67918941 | 2120 | else if (CONSP (Vdefault_process_coding_system)) |
70949dac | 2121 | val = XCAR (Vdefault_process_coding_system); |
67918941 RS |
2122 | else |
2123 | val = Qnil; | |
2124 | } | |
2125 | XPROCESS (proc)->decode_coding_system = val; | |
0fa1789e | 2126 | |
67918941 RS |
2127 | if (!NILP (Vcoding_system_for_write)) |
2128 | val = Vcoding_system_for_write; | |
2129 | else if (NILP (current_buffer->enable_multibyte_characters)) | |
2130 | val = Qnil; | |
2131 | else | |
2132 | { | |
2133 | if (EQ (coding_systems, Qt)) | |
2134 | { | |
2135 | args[0] = Qopen_network_stream, args[1] = name, | |
2136 | args[2] = buffer, args[3] = host, args[4] = service; | |
2137 | GCPRO1 (proc); | |
2138 | coding_systems = Ffind_operation_coding_system (5, args); | |
2139 | UNGCPRO; | |
2140 | } | |
2141 | if (CONSP (coding_systems)) | |
70949dac | 2142 | val = XCDR (coding_systems); |
67918941 | 2143 | else if (CONSP (Vdefault_process_coding_system)) |
70949dac | 2144 | val = XCDR (Vdefault_process_coding_system); |
67918941 RS |
2145 | else |
2146 | val = Qnil; | |
2147 | } | |
2148 | XPROCESS (proc)->encode_coding_system = val; | |
2149 | } | |
0fa1789e | 2150 | |
c7580538 KH |
2151 | if (!proc_decode_coding_system[inch]) |
2152 | proc_decode_coding_system[inch] | |
2153 | = (struct coding_system *) xmalloc (sizeof (struct coding_system)); | |
0fa1789e | 2154 | setup_coding_system (XPROCESS (proc)->decode_coding_system, |
c7580538 KH |
2155 | proc_decode_coding_system[inch]); |
2156 | if (!proc_encode_coding_system[outch]) | |
2157 | proc_encode_coding_system[outch] | |
2158 | = (struct coding_system *) xmalloc (sizeof (struct coding_system)); | |
0fa1789e | 2159 | setup_coding_system (XPROCESS (proc)->encode_coding_system, |
c7580538 | 2160 | proc_encode_coding_system[outch]); |
0fa1789e KH |
2161 | |
2162 | XPROCESS (proc)->decoding_buf = make_uninit_string (0); | |
e7fbaa65 | 2163 | XPROCESS (proc)->decoding_carryover = make_number (0); |
0fa1789e | 2164 | XPROCESS (proc)->encoding_buf = make_uninit_string (0); |
e7fbaa65 | 2165 | XPROCESS (proc)->encoding_carryover = make_number (0); |
0fa1789e | 2166 | |
aa91317a RS |
2167 | XPROCESS (proc)->inherit_coding_system_flag |
2168 | = (NILP (buffer) || !inherit_process_coding_system | |
2169 | ? Qnil : Qt); | |
52a1b894 | 2170 | |
d0d6b7c5 JB |
2171 | UNGCPRO; |
2172 | return proc; | |
2173 | } | |
2174 | #endif /* HAVE_SOCKETS */ | |
2175 | ||
6b53bb85 | 2176 | void |
d0d6b7c5 JB |
2177 | deactivate_process (proc) |
2178 | Lisp_Object proc; | |
2179 | { | |
2180 | register int inchannel, outchannel; | |
2181 | register struct Lisp_Process *p = XPROCESS (proc); | |
2182 | ||
a9f2c884 RS |
2183 | inchannel = XINT (p->infd); |
2184 | outchannel = XINT (p->outfd); | |
d0d6b7c5 | 2185 | |
a9f2c884 | 2186 | if (inchannel >= 0) |
d0d6b7c5 JB |
2187 | { |
2188 | /* Beware SIGCHLD hereabouts. */ | |
2189 | flush_pending_output (inchannel); | |
2190 | #ifdef VMS | |
2191 | { | |
2192 | VMS_PROC_STUFF *get_vms_process_pointer (), *vs; | |
2193 | sys$dassgn (outchannel); | |
c6c6865d | 2194 | vs = get_vms_process_pointer (p->pid); |
d0d6b7c5 JB |
2195 | if (vs) |
2196 | give_back_vms_process_stuff (vs); | |
2197 | } | |
2198 | #else | |
2199 | close (inchannel); | |
a9f2c884 | 2200 | if (outchannel >= 0 && outchannel != inchannel) |
d0d6b7c5 JB |
2201 | close (outchannel); |
2202 | #endif | |
2203 | ||
1d056e64 KH |
2204 | XSETINT (p->infd, -1); |
2205 | XSETINT (p->outfd, -1); | |
d0d6b7c5 JB |
2206 | chan_process[inchannel] = Qnil; |
2207 | FD_CLR (inchannel, &input_wait_mask); | |
a69281ff | 2208 | FD_CLR (inchannel, &non_keyboard_wait_mask); |
7d0e672e RS |
2209 | if (inchannel == max_process_desc) |
2210 | { | |
2211 | int i; | |
2212 | /* We just closed the highest-numbered process input descriptor, | |
2213 | so recompute the highest-numbered one now. */ | |
2214 | max_process_desc = 0; | |
2215 | for (i = 0; i < MAXDESC; i++) | |
2216 | if (!NILP (chan_process[i])) | |
2217 | max_process_desc = i; | |
2218 | } | |
d0d6b7c5 JB |
2219 | } |
2220 | } | |
2221 | ||
2222 | /* Close all descriptors currently in use for communication | |
2223 | with subprocess. This is used in a newly-forked subprocess | |
2224 | to get rid of irrelevant descriptors. */ | |
2225 | ||
6b53bb85 | 2226 | void |
d0d6b7c5 JB |
2227 | close_process_descs () |
2228 | { | |
e98d950b | 2229 | #ifndef WINDOWSNT |
d0d6b7c5 JB |
2230 | int i; |
2231 | for (i = 0; i < MAXDESC; i++) | |
2232 | { | |
2233 | Lisp_Object process; | |
2234 | process = chan_process[i]; | |
2235 | if (!NILP (process)) | |
2236 | { | |
a9f2c884 RS |
2237 | int in = XINT (XPROCESS (process)->infd); |
2238 | int out = XINT (XPROCESS (process)->outfd); | |
2239 | if (in >= 0) | |
d0d6b7c5 | 2240 | close (in); |
a9f2c884 | 2241 | if (out >= 0 && in != out) |
d0d6b7c5 JB |
2242 | close (out); |
2243 | } | |
2244 | } | |
e98d950b | 2245 | #endif |
d0d6b7c5 JB |
2246 | } |
2247 | \f | |
2248 | DEFUN ("accept-process-output", Faccept_process_output, Saccept_process_output, | |
2249 | 0, 3, 0, | |
2250 | "Allow any pending output from subprocesses to be read by Emacs.\n\ | |
2251 | It is read into the process' buffers or given to their filter functions.\n\ | |
2252 | Non-nil arg PROCESS means do not return until some output has been received\n\ | |
2253 | from PROCESS.\n\ | |
2254 | Non-nil second arg TIMEOUT and third arg TIMEOUT-MSECS are number of\n\ | |
2255 | seconds and microseconds to wait; return after that much time whether\n\ | |
2256 | or not there is input.\n\ | |
2257 | Return non-nil iff we received any output before the timeout expired.") | |
4ee3e309 EN |
2258 | (process, timeout, timeout_msecs) |
2259 | register Lisp_Object process, timeout, timeout_msecs; | |
d0d6b7c5 JB |
2260 | { |
2261 | int seconds; | |
2262 | int useconds; | |
2263 | ||
0748d150 RS |
2264 | if (! NILP (process)) |
2265 | CHECK_PROCESS (process, 0); | |
2266 | ||
d0d6b7c5 JB |
2267 | if (! NILP (timeout_msecs)) |
2268 | { | |
2269 | CHECK_NUMBER (timeout_msecs, 2); | |
2270 | useconds = XINT (timeout_msecs); | |
bcd69aea | 2271 | if (!INTEGERP (timeout)) |
1d056e64 | 2272 | XSETINT (timeout, 0); |
d0d6b7c5 JB |
2273 | |
2274 | { | |
2275 | int carry = useconds / 1000000; | |
2276 | ||
2277 | XSETINT (timeout, XINT (timeout) + carry); | |
2278 | useconds -= carry * 1000000; | |
2279 | ||
2280 | /* I think this clause is necessary because C doesn't | |
2281 | guarantee a particular rounding direction for negative | |
2282 | integers. */ | |
2283 | if (useconds < 0) | |
2284 | { | |
2285 | XSETINT (timeout, XINT (timeout) - 1); | |
2286 | useconds += 1000000; | |
2287 | } | |
2288 | } | |
2289 | } | |
de946e5a RS |
2290 | else |
2291 | useconds = 0; | |
d0d6b7c5 JB |
2292 | |
2293 | if (! NILP (timeout)) | |
2294 | { | |
2295 | CHECK_NUMBER (timeout, 1); | |
2296 | seconds = XINT (timeout); | |
ada9a4fd | 2297 | if (seconds < 0 || (seconds == 0 && useconds == 0)) |
d0d6b7c5 JB |
2298 | seconds = -1; |
2299 | } | |
2300 | else | |
2301 | { | |
4ee3e309 | 2302 | if (NILP (process)) |
d0d6b7c5 JB |
2303 | seconds = -1; |
2304 | else | |
2305 | seconds = 0; | |
2306 | } | |
2307 | ||
4ee3e309 EN |
2308 | if (NILP (process)) |
2309 | XSETFASTINT (process, 0); | |
f76475ad | 2310 | |
d0d6b7c5 | 2311 | return |
4ee3e309 | 2312 | (wait_reading_process_input (seconds, useconds, process, 0) |
d0d6b7c5 JB |
2313 | ? Qt : Qnil); |
2314 | } | |
2315 | ||
2316 | /* This variable is different from waiting_for_input in keyboard.c. | |
2317 | It is used to communicate to a lisp process-filter/sentinel (via the | |
2318 | function Fwaiting_for_user_input_p below) whether emacs was waiting | |
2319 | for user-input when that process-filter was called. | |
2320 | waiting_for_input cannot be used as that is by definition 0 when | |
d430ee71 RS |
2321 | lisp code is being evalled. |
2322 | This is also used in record_asynch_buffer_change. | |
2323 | For that purpose, this must be 0 | |
2324 | when not inside wait_reading_process_input. */ | |
d0d6b7c5 JB |
2325 | static int waiting_for_user_input_p; |
2326 | ||
c573ae8e | 2327 | /* This is here so breakpoints can be put on it. */ |
dfcf069d | 2328 | static void |
c573ae8e RS |
2329 | wait_reading_process_input_1 () |
2330 | { | |
2331 | } | |
2332 | ||
d0d6b7c5 JB |
2333 | /* Read and dispose of subprocess output while waiting for timeout to |
2334 | elapse and/or keyboard input to be available. | |
2335 | ||
de6fd4b9 | 2336 | TIME_LIMIT is: |
d0d6b7c5 JB |
2337 | timeout in seconds, or |
2338 | zero for no limit, or | |
2339 | -1 means gobble data immediately available but don't wait for any. | |
2340 | ||
de6fd4b9 RS |
2341 | MICROSECS is: |
2342 | an additional duration to wait, measured in microseconds. | |
2343 | If this is nonzero and time_limit is 0, then the timeout | |
2344 | consists of MICROSECS only. | |
6e4f3667 | 2345 | |
de6fd4b9 | 2346 | READ_KBD is a lisp value: |
d0d6b7c5 JB |
2347 | 0 to ignore keyboard input, or |
2348 | 1 to return when input is available, or | |
84aa3ace | 2349 | -1 meaning caller will actually read the input, so don't throw to |
d0d6b7c5 | 2350 | the quit handler, or |
e6194ffc | 2351 | a cons cell, meaning wait until its car is non-nil |
de6fd4b9 | 2352 | (and gobble terminal input into the buffer if any arrives), or |
f76475ad JB |
2353 | a process object, meaning wait until something arrives from that |
2354 | process. The return value is true iff we read some input from | |
2355 | that process. | |
d0d6b7c5 | 2356 | |
de6fd4b9 | 2357 | DO_DISPLAY != 0 means redisplay should be done to show subprocess |
d0d6b7c5 JB |
2358 | output that arrives. |
2359 | ||
de6fd4b9 | 2360 | If READ_KBD is a pointer to a struct Lisp_Process, then the |
d0d6b7c5 JB |
2361 | function returns true iff we received input from that process |
2362 | before the timeout elapsed. | |
eb8c3be9 | 2363 | Otherwise, return true iff we received input from any process. */ |
d0d6b7c5 | 2364 | |
dfcf069d | 2365 | int |
d0d6b7c5 | 2366 | wait_reading_process_input (time_limit, microsecs, read_kbd, do_display) |
f76475ad JB |
2367 | int time_limit, microsecs; |
2368 | Lisp_Object read_kbd; | |
2369 | int do_display; | |
d0d6b7c5 | 2370 | { |
41d03b9a | 2371 | register int channel, nfds; |
d0d6b7c5 JB |
2372 | static SELECT_TYPE Available; |
2373 | int xerrno; | |
2374 | Lisp_Object proc; | |
41d03b9a | 2375 | EMACS_TIME timeout, end_time; |
d0d6b7c5 | 2376 | SELECT_TYPE Atemp; |
a9f2c884 | 2377 | int wait_channel = -1; |
d0d6b7c5 JB |
2378 | struct Lisp_Process *wait_proc = 0; |
2379 | int got_some_input = 0; | |
84aa3ace | 2380 | Lisp_Object *wait_for_cell = 0; |
d0d6b7c5 JB |
2381 | |
2382 | FD_ZERO (&Available); | |
2383 | ||
f76475ad JB |
2384 | /* If read_kbd is a process to watch, set wait_proc and wait_channel |
2385 | accordingly. */ | |
bcd69aea | 2386 | if (PROCESSP (read_kbd)) |
d0d6b7c5 | 2387 | { |
f76475ad | 2388 | wait_proc = XPROCESS (read_kbd); |
a9f2c884 | 2389 | wait_channel = XINT (wait_proc->infd); |
22719df2 | 2390 | XSETFASTINT (read_kbd, 0); |
d0d6b7c5 JB |
2391 | } |
2392 | ||
84aa3ace | 2393 | /* If waiting for non-nil in a cell, record where. */ |
bcd69aea | 2394 | if (CONSP (read_kbd)) |
84aa3ace | 2395 | { |
70949dac | 2396 | wait_for_cell = &XCAR (read_kbd); |
22719df2 | 2397 | XSETFASTINT (read_kbd, 0); |
84aa3ace RS |
2398 | } |
2399 | ||
f76475ad | 2400 | waiting_for_user_input_p = XINT (read_kbd); |
d0d6b7c5 JB |
2401 | |
2402 | /* Since we may need to wait several times, | |
2403 | compute the absolute time to return at. */ | |
2404 | if (time_limit || microsecs) | |
2405 | { | |
2406 | EMACS_GET_TIME (end_time); | |
2407 | EMACS_SET_SECS_USECS (timeout, time_limit, microsecs); | |
2408 | EMACS_ADD_TIME (end_time, end_time, timeout); | |
2409 | } | |
e07d5449 KH |
2410 | #ifdef hpux |
2411 | /* AlainF 5-Jul-1996 | |
2412 | HP-UX 10.10 seem to have problems with signals coming in | |
2413 | Causes "poll: interrupted system call" messages when Emacs is run | |
2414 | in an X window | |
2415 | Turn off periodic alarms (in case they are in use) */ | |
2416 | stop_polling (); | |
2417 | #endif | |
d0d6b7c5 | 2418 | |
d0d6b7c5 JB |
2419 | while (1) |
2420 | { | |
c0239a0b RS |
2421 | int timeout_reduced_for_timers = 0; |
2422 | ||
efa2a55c GM |
2423 | #ifdef HAVE_X_WINDOWS |
2424 | if (display_busy_cursor_p) | |
2425 | Fx_hide_busy_cursor (Qnil); | |
2426 | #endif | |
2427 | ||
d0d6b7c5 JB |
2428 | /* If calling from keyboard input, do not quit |
2429 | since we want to return C-g as an input character. | |
2430 | Otherwise, do pending quit if requested. */ | |
f76475ad | 2431 | if (XINT (read_kbd) >= 0) |
d0d6b7c5 JB |
2432 | QUIT; |
2433 | ||
889255b4 RS |
2434 | /* Exit now if the cell we're waiting for became non-nil. */ |
2435 | if (wait_for_cell && ! NILP (*wait_for_cell)) | |
2436 | break; | |
2437 | ||
d0d6b7c5 JB |
2438 | /* Compute time from now till when time limit is up */ |
2439 | /* Exit if already run out */ | |
2440 | if (time_limit == -1) | |
2441 | { | |
2442 | /* -1 specified for timeout means | |
2443 | gobble output available now | |
2444 | but don't wait at all. */ | |
2445 | ||
2446 | EMACS_SET_SECS_USECS (timeout, 0, 0); | |
2447 | } | |
2448 | else if (time_limit || microsecs) | |
2449 | { | |
2450 | EMACS_GET_TIME (timeout); | |
2451 | EMACS_SUB_TIME (timeout, end_time, timeout); | |
2452 | if (EMACS_TIME_NEG_P (timeout)) | |
2453 | break; | |
2454 | } | |
2455 | else | |
2456 | { | |
2457 | EMACS_SET_SECS_USECS (timeout, 100000, 0); | |
2458 | } | |
2459 | ||
f854a00b RS |
2460 | /* Normally we run timers here. |
2461 | But not if wait_for_cell; in those cases, | |
2462 | the wait is supposed to be short, | |
2463 | and those callers cannot handle running arbitrary Lisp code here. */ | |
2464 | if (! wait_for_cell) | |
fb4c3627 | 2465 | { |
c0239a0b | 2466 | EMACS_TIME timer_delay; |
c573ae8e RS |
2467 | int old_timers_run; |
2468 | ||
2469 | retry: | |
2470 | old_timers_run = timers_run; | |
c0239a0b | 2471 | timer_delay = timer_check (1); |
5de50bfb | 2472 | if (timers_run != old_timers_run && do_display) |
c573ae8e RS |
2473 | { |
2474 | redisplay_preserve_echo_area (); | |
2475 | /* We must retry, since a timer may have requeued itself | |
2476 | and that could alter the time_delay. */ | |
2477 | goto retry; | |
2478 | } | |
2479 | ||
69645afc RS |
2480 | /* If there is unread keyboard input, also return. */ |
2481 | if (XINT (read_kbd) != 0 | |
2482 | && requeued_events_pending_p ()) | |
2483 | break; | |
2484 | ||
c0239a0b | 2485 | if (! EMACS_TIME_NEG_P (timer_delay) && time_limit != -1) |
fb4c3627 RS |
2486 | { |
2487 | EMACS_TIME difference; | |
2488 | EMACS_SUB_TIME (difference, timer_delay, timeout); | |
2489 | if (EMACS_TIME_NEG_P (difference)) | |
c0239a0b RS |
2490 | { |
2491 | timeout = timer_delay; | |
2492 | timeout_reduced_for_timers = 1; | |
2493 | } | |
fb4c3627 | 2494 | } |
4abca5e7 RS |
2495 | /* If time_limit is -1, we are not going to wait at all. */ |
2496 | else if (time_limit != -1) | |
c573ae8e RS |
2497 | { |
2498 | /* This is so a breakpoint can be put here. */ | |
2499 | wait_reading_process_input_1 (); | |
2500 | } | |
fb4c3627 RS |
2501 | } |
2502 | ||
90ab1a81 JB |
2503 | /* Cause C-g and alarm signals to take immediate action, |
2504 | and cause input available signals to zero out timeout. | |
2505 | ||
2506 | It is important that we do this before checking for process | |
2507 | activity. If we get a SIGCHLD after the explicit checks for | |
2508 | process activity, timeout is the only way we will know. */ | |
2509 | if (XINT (read_kbd) < 0) | |
2510 | set_waiting_for_input (&timeout); | |
2511 | ||
6be429b1 JB |
2512 | /* If status of something has changed, and no input is |
2513 | available, notify the user of the change right away. After | |
2514 | this explicit check, we'll let the SIGCHLD handler zap | |
2515 | timeout to get our attention. */ | |
2516 | if (update_tick != process_tick && do_display) | |
2517 | { | |
2518 | Atemp = input_wait_mask; | |
2519 | EMACS_SET_SECS_USECS (timeout, 0, 0); | |
0c9960e9 RS |
2520 | if ((select (max (max_process_desc, max_keyboard_desc) + 1, |
2521 | &Atemp, (SELECT_TYPE *)0, (SELECT_TYPE *)0, | |
ecd1f654 KH |
2522 | &timeout) |
2523 | <= 0)) | |
90ab1a81 JB |
2524 | { |
2525 | /* It's okay for us to do this and then continue with | |
a0e4d3f3 | 2526 | the loop, since timeout has already been zeroed out. */ |
90ab1a81 JB |
2527 | clear_waiting_for_input (); |
2528 | status_notify (); | |
2529 | } | |
6be429b1 JB |
2530 | } |
2531 | ||
2532 | /* Don't wait for output from a non-running process. */ | |
2533 | if (wait_proc != 0 && !NILP (wait_proc->raw_status_low)) | |
2534 | update_status (wait_proc); | |
2535 | if (wait_proc != 0 | |
2536 | && ! EQ (wait_proc->status, Qrun)) | |
9aa2a7f4 | 2537 | { |
215b45e9 | 2538 | int nread, total_nread = 0; |
7ce63188 | 2539 | |
9aa2a7f4 | 2540 | clear_waiting_for_input (); |
7ce63188 RS |
2541 | XSETPROCESS (proc, wait_proc); |
2542 | ||
2543 | /* Read data from the process, until we exhaust it. */ | |
1c0707fd | 2544 | while (XINT (wait_proc->infd) >= 0 |
97a084c1 RS |
2545 | && (nread |
2546 | = read_process_output (proc, XINT (wait_proc->infd)))) | |
215b45e9 RS |
2547 | { |
2548 | if (0 < nread) | |
2549 | total_nread += nread; | |
2550 | #ifdef EIO | |
2551 | else if (nread == -1 && EIO == errno) | |
2552 | break; | |
2553 | #endif | |
2554 | } | |
7ce63188 RS |
2555 | if (total_nread > 0 && do_display) |
2556 | redisplay_preserve_echo_area (); | |
2557 | ||
9aa2a7f4 JB |
2558 | break; |
2559 | } | |
6be429b1 | 2560 | |
d0d6b7c5 JB |
2561 | /* Wait till there is something to do */ |
2562 | ||
b5dc1c83 RS |
2563 | if (wait_for_cell) |
2564 | Available = non_process_wait_mask; | |
2565 | else if (! XINT (read_kbd)) | |
a69281ff RS |
2566 | Available = non_keyboard_wait_mask; |
2567 | else | |
2568 | Available = input_wait_mask; | |
d0d6b7c5 | 2569 | |
ff11dfa1 | 2570 | /* If frame size has changed or the window is newly mapped, |
ffd56f97 JB |
2571 | redisplay now, before we start to wait. There is a race |
2572 | condition here; if a SIGIO arrives between now and the select | |
016899c0 JB |
2573 | and indicates that a frame is trashed, the select may block |
2574 | displaying a trashed screen. */ | |
5164ee8e | 2575 | if (frame_garbaged && do_display) |
7286affd RS |
2576 | { |
2577 | clear_waiting_for_input (); | |
2578 | redisplay_preserve_echo_area (); | |
2579 | if (XINT (read_kbd) < 0) | |
7efe788e | 2580 | set_waiting_for_input (&timeout); |
7286affd | 2581 | } |
ffd56f97 | 2582 | |
0a65b032 RS |
2583 | if (XINT (read_kbd) && detect_input_pending ()) |
2584 | { | |
2585 | nfds = 0; | |
2586 | FD_ZERO (&Available); | |
2587 | } | |
2588 | else | |
0c9960e9 RS |
2589 | nfds = select (max (max_process_desc, max_keyboard_desc) + 1, |
2590 | &Available, (SELECT_TYPE *)0, (SELECT_TYPE *)0, | |
0a65b032 | 2591 | &timeout); |
6720a7fb | 2592 | |
d0d6b7c5 JB |
2593 | xerrno = errno; |
2594 | ||
2595 | /* Make C-g and alarm signals set flags again */ | |
2596 | clear_waiting_for_input (); | |
2597 | ||
2598 | /* If we woke up due to SIGWINCH, actually change size now. */ | |
2b653806 | 2599 | do_pending_window_change (0); |
d0d6b7c5 | 2600 | |
c0239a0b RS |
2601 | if (time_limit && nfds == 0 && ! timeout_reduced_for_timers) |
2602 | /* We wanted the full specified time, so return now. */ | |
d0d6b7c5 JB |
2603 | break; |
2604 | if (nfds < 0) | |
2605 | { | |
2606 | if (xerrno == EINTR) | |
2607 | FD_ZERO (&Available); | |
b0310da4 JB |
2608 | #ifdef ultrix |
2609 | /* Ultrix select seems to return ENOMEM when it is | |
2610 | interrupted. Treat it just like EINTR. Bleah. Note | |
2611 | that we want to test for the "ultrix" CPP symbol, not | |
2612 | "__ultrix__"; the latter is only defined under GCC, but | |
2613 | not by DEC's bundled CC. -JimB */ | |
8058415c JB |
2614 | else if (xerrno == ENOMEM) |
2615 | FD_ZERO (&Available); | |
2616 | #endif | |
d0d6b7c5 JB |
2617 | #ifdef ALLIANT |
2618 | /* This happens for no known reason on ALLIANT. | |
2619 | I am guessing that this is the right response. -- RMS. */ | |
2620 | else if (xerrno == EFAULT) | |
2621 | FD_ZERO (&Available); | |
2622 | #endif | |
2623 | else if (xerrno == EBADF) | |
2624 | { | |
2625 | #ifdef AIX | |
2626 | /* AIX doesn't handle PTY closure the same way BSD does. On AIX, | |
2627 | the child's closure of the pts gives the parent a SIGHUP, and | |
2628 | the ptc file descriptor is automatically closed, | |
2629 | yielding EBADF here or at select() call above. | |
2630 | So, SIGHUP is ignored (see def of PTY_TTY_NAME_SPRINTF | |
a0e4d3f3 | 2631 | in m/ibmrt-aix.h), and here we just ignore the select error. |
d0d6b7c5 | 2632 | Cleanup occurs c/o status_notify after SIGCLD. */ |
ffd56f97 | 2633 | FD_ZERO (&Available); /* Cannot depend on values returned */ |
d0d6b7c5 JB |
2634 | #else |
2635 | abort (); | |
2636 | #endif | |
2637 | } | |
2638 | else | |
6ed6233b | 2639 | error ("select error: %s", strerror (xerrno)); |
d0d6b7c5 | 2640 | } |
26ec91de | 2641 | #if defined(sun) && !defined(USG5_4) |
a69281ff | 2642 | else if (nfds > 0 && keyboard_bit_set (&Available) |
dd2281ae | 2643 | && interrupt_input) |
e0109153 JB |
2644 | /* System sometimes fails to deliver SIGIO. |
2645 | ||
2646 | David J. Mackenzie says that Emacs doesn't compile under | |
2647 | Solaris if this code is enabled, thus the USG5_4 in the CPP | |
2648 | conditional. "I haven't noticed any ill effects so far. | |
2649 | If you find a Solaris expert somewhere, they might know | |
2650 | better." */ | |
d0d6b7c5 JB |
2651 | kill (getpid (), SIGIO); |
2652 | #endif | |
2653 | ||
5d5beb62 RS |
2654 | #if 0 /* When polling is used, interrupt_input is 0, |
2655 | so get_input_pending should read the input. | |
2656 | So this should not be needed. */ | |
2657 | /* If we are using polling for input, | |
2658 | and we see input available, make it get read now. | |
2659 | Otherwise it might not actually get read for a second. | |
2660 | And on hpux, since we turn off polling in wait_reading_process_input, | |
2661 | it might never get read at all if we don't spend much time | |
2662 | outside of wait_reading_process_input. */ | |
2663 | if (XINT (read_kbd) && interrupt_input | |
2664 | && keyboard_bit_set (&Available) | |
2665 | && input_polling_used ()) | |
2666 | kill (getpid (), SIGALRM); | |
2667 | #endif | |
2668 | ||
d0d6b7c5 JB |
2669 | /* Check for keyboard input */ |
2670 | /* If there is any, return immediately | |
2671 | to give it higher priority than subprocesses */ | |
2672 | ||
77e1b3d4 | 2673 | if (XINT (read_kbd) != 0 |
5d6c2aa3 | 2674 | && detect_input_pending_run_timers (do_display)) |
6ed6233b KH |
2675 | { |
2676 | swallow_events (do_display); | |
5d6c2aa3 | 2677 | if (detect_input_pending_run_timers (do_display)) |
6ed6233b KH |
2678 | break; |
2679 | } | |
2680 | ||
69645afc RS |
2681 | /* If there is unread keyboard input, also return. */ |
2682 | if (XINT (read_kbd) != 0 | |
2683 | && requeued_events_pending_p ()) | |
2684 | break; | |
2685 | ||
77e1b3d4 RS |
2686 | /* If we are not checking for keyboard input now, |
2687 | do process events (but don't run any timers). | |
2688 | This is so that X events will be processed. | |
0c9960e9 | 2689 | Otherwise they may have to wait until polling takes place. |
77e1b3d4 RS |
2690 | That would causes delays in pasting selections, for example. |
2691 | ||
2692 | (We used to do this only if wait_for_cell.) */ | |
2693 | if (XINT (read_kbd) == 0 && detect_input_pending ()) | |
f854a00b RS |
2694 | { |
2695 | swallow_events (do_display); | |
0c9960e9 | 2696 | #if 0 /* Exiting when read_kbd doesn't request that seems wrong, though. */ |
f854a00b RS |
2697 | if (detect_input_pending ()) |
2698 | break; | |
5d5beb62 | 2699 | #endif |
0c9960e9 | 2700 | } |
f854a00b | 2701 | |
84aa3ace RS |
2702 | /* Exit now if the cell we're waiting for became non-nil. */ |
2703 | if (wait_for_cell && ! NILP (*wait_for_cell)) | |
2704 | break; | |
2705 | ||
4746118a | 2706 | #ifdef SIGIO |
5d5beb62 | 2707 | /* If we think we have keyboard input waiting, but didn't get SIGIO, |
d0d6b7c5 JB |
2708 | go read it. This can happen with X on BSD after logging out. |
2709 | In that case, there really is no input and no SIGIO, | |
2710 | but select says there is input. */ | |
2711 | ||
dd2281ae | 2712 | if (XINT (read_kbd) && interrupt_input |
5d5beb62 | 2713 | && keyboard_bit_set (&Available)) |
e643c5be | 2714 | kill (getpid (), SIGIO); |
4746118a | 2715 | #endif |
d0d6b7c5 | 2716 | |
d0d6b7c5 JB |
2717 | if (! wait_proc) |
2718 | got_some_input |= nfds > 0; | |
2719 | ||
32676c08 JB |
2720 | /* If checking input just got us a size-change event from X, |
2721 | obey it now if we should. */ | |
97f3b3d6 | 2722 | if (XINT (read_kbd) || wait_for_cell) |
2b653806 | 2723 | do_pending_window_change (0); |
32676c08 | 2724 | |
a9f2c884 RS |
2725 | /* Check for data from a process. */ |
2726 | /* Really FIRST_PROC_DESC should be 0 on Unix, | |
2727 | but this is safer in the short run. */ | |
a69281ff | 2728 | for (channel = 0; channel <= max_process_desc; channel++) |
d0d6b7c5 | 2729 | { |
a69281ff RS |
2730 | if (FD_ISSET (channel, &Available) |
2731 | && FD_ISSET (channel, &non_keyboard_wait_mask)) | |
d0d6b7c5 JB |
2732 | { |
2733 | int nread; | |
2734 | ||
2735 | /* If waiting for this channel, arrange to return as | |
2736 | soon as no more input to be processed. No more | |
2737 | waiting. */ | |
2738 | if (wait_channel == channel) | |
2739 | { | |
a9f2c884 | 2740 | wait_channel = -1; |
d0d6b7c5 JB |
2741 | time_limit = -1; |
2742 | got_some_input = 1; | |
2743 | } | |
2744 | proc = chan_process[channel]; | |
2745 | if (NILP (proc)) | |
2746 | continue; | |
2747 | ||
d0d6b7c5 JB |
2748 | /* Read data from the process, starting with our |
2749 | buffered-ahead character if we have one. */ | |
2750 | ||
2751 | nread = read_process_output (proc, channel); | |
2752 | if (nread > 0) | |
2753 | { | |
2754 | /* Since read_process_output can run a filter, | |
2755 | which can call accept-process-output, | |
2756 | don't try to read from any other processes | |
2757 | before doing the select again. */ | |
2758 | FD_ZERO (&Available); | |
2759 | ||
2760 | if (do_display) | |
2761 | redisplay_preserve_echo_area (); | |
2762 | } | |
2763 | #ifdef EWOULDBLOCK | |
2764 | else if (nread == -1 && errno == EWOULDBLOCK) | |
2765 | ; | |
0b75e9a4 | 2766 | #endif |
89d7280d RS |
2767 | /* ISC 4.1 defines both EWOULDBLOCK and O_NONBLOCK, |
2768 | and Emacs uses O_NONBLOCK, so what we get is EAGAIN. */ | |
d0d6b7c5 JB |
2769 | #ifdef O_NONBLOCK |
2770 | else if (nread == -1 && errno == EAGAIN) | |
2771 | ; | |
2772 | #else | |
2773 | #ifdef O_NDELAY | |
2774 | else if (nread == -1 && errno == EAGAIN) | |
2775 | ; | |
2776 | /* Note that we cannot distinguish between no input | |
2777 | available now and a closed pipe. | |
2778 | With luck, a closed pipe will be accompanied by | |
2779 | subprocess termination and SIGCHLD. */ | |
2780 | else if (nread == 0 && !NETCONN_P (proc)) | |
2781 | ; | |
ffd56f97 JB |
2782 | #endif /* O_NDELAY */ |
2783 | #endif /* O_NONBLOCK */ | |
d0d6b7c5 JB |
2784 | #ifdef HAVE_PTYS |
2785 | /* On some OSs with ptys, when the process on one end of | |
2786 | a pty exits, the other end gets an error reading with | |
2787 | errno = EIO instead of getting an EOF (0 bytes read). | |
2788 | Therefore, if we get an error reading and errno = | |
2789 | EIO, just continue, because the child process has | |
2790 | exited and should clean itself up soon (e.g. when we | |
5651af6d RS |
2791 | get a SIGCHLD). |
2792 | ||
2793 | However, it has been known to happen that the SIGCHLD | |
2794 | got lost. So raise the signl again just in case. | |
2795 | It can't hurt. */ | |
d0d6b7c5 | 2796 | else if (nread == -1 && errno == EIO) |
5651af6d | 2797 | kill (getpid (), SIGCHLD); |
ffd56f97 JB |
2798 | #endif /* HAVE_PTYS */ |
2799 | /* If we can detect process termination, don't consider the process | |
2800 | gone just because its pipe is closed. */ | |
d0d6b7c5 JB |
2801 | #ifdef SIGCHLD |
2802 | else if (nread == 0 && !NETCONN_P (proc)) | |
2803 | ; | |
2804 | #endif | |
2805 | else | |
2806 | { | |
2807 | /* Preserve status of processes already terminated. */ | |
2808 | XSETINT (XPROCESS (proc)->tick, ++process_tick); | |
2809 | deactivate_process (proc); | |
2810 | if (!NILP (XPROCESS (proc)->raw_status_low)) | |
2811 | update_status (XPROCESS (proc)); | |
2812 | if (EQ (XPROCESS (proc)->status, Qrun)) | |
2813 | XPROCESS (proc)->status | |
2814 | = Fcons (Qexit, Fcons (make_number (256), Qnil)); | |
2815 | } | |
2816 | } | |
ffd56f97 JB |
2817 | } /* end for each file descriptor */ |
2818 | } /* end while exit conditions not met */ | |
d0d6b7c5 | 2819 | |
d430ee71 RS |
2820 | waiting_for_user_input_p = 0; |
2821 | ||
ffd56f97 JB |
2822 | /* If calling from keyboard input, do not quit |
2823 | since we want to return C-g as an input character. | |
2824 | Otherwise, do pending quit if requested. */ | |
f76475ad | 2825 | if (XINT (read_kbd) >= 0) |
ffd56f97 JB |
2826 | { |
2827 | /* Prevent input_pending from remaining set if we quit. */ | |
2828 | clear_input_pending (); | |
2829 | QUIT; | |
2830 | } | |
e07d5449 KH |
2831 | #ifdef hpux |
2832 | /* AlainF 5-Jul-1996 | |
2833 | HP-UX 10.10 seems to have problems with signals coming in | |
2834 | Causes "poll: interrupted system call" messages when Emacs is run | |
2835 | in an X window | |
2836 | Turn periodic alarms back on */ | |
5d5beb62 | 2837 | start_polling (); |
e07d5449 | 2838 | #endif |
efa2a55c GM |
2839 | |
2840 | #ifdef HAVE_X_WINDOWS | |
2841 | if (display_busy_cursor_p) | |
2842 | if (!inhibit_busy_cursor) | |
2843 | Fx_show_busy_cursor (); | |
2844 | #endif | |
e07d5449 | 2845 | |
d0d6b7c5 JB |
2846 | return got_some_input; |
2847 | } | |
2848 | \f | |
3b9a3dfa RS |
2849 | /* Given a list (FUNCTION ARGS...), apply FUNCTION to the ARGS. */ |
2850 | ||
2851 | static Lisp_Object | |
2852 | read_process_output_call (fun_and_args) | |
2853 | Lisp_Object fun_and_args; | |
2854 | { | |
70949dac | 2855 | return apply1 (XCAR (fun_and_args), XCDR (fun_and_args)); |
3b9a3dfa RS |
2856 | } |
2857 | ||
2858 | static Lisp_Object | |
2859 | read_process_output_error_handler (error) | |
2860 | Lisp_Object error; | |
2861 | { | |
2862 | cmd_error_internal (error, "error in process filter: "); | |
2863 | Vinhibit_quit = Qt; | |
2864 | update_echo_area (); | |
833ba342 | 2865 | Fsleep_for (make_number (2), Qnil); |
3b9a3dfa RS |
2866 | } |
2867 | ||
d0d6b7c5 JB |
2868 | /* Read pending output from the process channel, |
2869 | starting with our buffered-ahead character if we have one. | |
0fa1789e | 2870 | Yield number of decoded characters read. |
d0d6b7c5 JB |
2871 | |
2872 | This function reads at most 1024 characters. | |
2873 | If you want to read all available subprocess output, | |
0fa1789e KH |
2874 | you must call it repeatedly until it returns zero. |
2875 | ||
2876 | The characters read are decoded according to PROC's coding-system | |
2877 | for decoding. */ | |
d0d6b7c5 | 2878 | |
dfcf069d | 2879 | int |
d0d6b7c5 JB |
2880 | read_process_output (proc, channel) |
2881 | Lisp_Object proc; | |
2882 | register int channel; | |
2883 | { | |
1d2fc612 | 2884 | register int nchars, nbytes; |
d0d6b7c5 | 2885 | char *chars; |
0fa1789e KH |
2886 | #ifdef VMS |
2887 | int chars_allocated = 0; /* If 1, `chars' should be freed later. */ | |
d0d6b7c5 | 2888 | #else |
0fa1789e | 2889 | char buf[1024]; |
d0d6b7c5 JB |
2890 | #endif |
2891 | register Lisp_Object outstream; | |
2892 | register struct buffer *old = current_buffer; | |
2893 | register struct Lisp_Process *p = XPROCESS (proc); | |
2894 | register int opoint; | |
c7580538 | 2895 | struct coding_system *coding = proc_decode_coding_system[channel]; |
0fa1789e KH |
2896 | int chars_in_decoding_buf = 0; /* If 1, `chars' points |
2897 | XSTRING (p->decoding_buf)->data. */ | |
e7fbaa65 | 2898 | int carryover = XINT (p->decoding_carryover); |
d0d6b7c5 JB |
2899 | |
2900 | #ifdef VMS | |
2901 | VMS_PROC_STUFF *vs, *get_vms_process_pointer(); | |
2902 | ||
2903 | vs = get_vms_process_pointer (p->pid); | |
2904 | if (vs) | |
2905 | { | |
2906 | if (!vs->iosb[0]) | |
a319f7c1 | 2907 | return (0); /* Really weird if it does this */ |
d0d6b7c5 JB |
2908 | if (!(vs->iosb[0] & 1)) |
2909 | return -1; /* I/O error */ | |
2910 | } | |
2911 | else | |
2912 | error ("Could not get VMS process pointer"); | |
2913 | chars = vs->inputBuffer; | |
1d2fc612 RS |
2914 | nbytes = clean_vms_buffer (chars, vs->iosb[1]); |
2915 | if (nbytes <= 0) | |
d0d6b7c5 JB |
2916 | { |
2917 | start_vms_process_read (vs); /* Crank up the next read on the process */ | |
2918 | return 1; /* Nothing worth printing, say we got 1 */ | |
2919 | } | |
e7fbaa65 | 2920 | if (carryover > 0) |
0fa1789e | 2921 | { |
e7fbaa65 KH |
2922 | /* The data carried over in the previous decoding (which are at |
2923 | the tail of decoding buffer) should be prepended to the new | |
2924 | data read to decode all together. */ | |
2925 | char *buf = (char *) xmalloc (nbytes + carryover); | |
2926 | ||
2927 | bcopy (XSTRING (p->decoding_buf)->data | |
fc932ac6 | 2928 | + STRING_BYTES (XSTRING (p->decoding_buf)) - carryover, |
e7fbaa65 KH |
2929 | buf, carryover); |
2930 | bcopy (chars, buf + carryover, nbytes); | |
0fa1789e KH |
2931 | chars = buf; |
2932 | chars_allocated = 1; | |
2933 | } | |
d0d6b7c5 JB |
2934 | #else /* not VMS */ |
2935 | ||
e7fbaa65 KH |
2936 | if (carryover) |
2937 | /* See the comment above. */ | |
2938 | bcopy (XSTRING (p->decoding_buf)->data | |
fc932ac6 | 2939 | + STRING_BYTES (XSTRING (p->decoding_buf)) - carryover, |
e7fbaa65 | 2940 | buf, carryover); |
0fa1789e | 2941 | |
d0d6b7c5 | 2942 | if (proc_buffered_char[channel] < 0) |
e7fbaa65 | 2943 | nbytes = read (channel, buf + carryover, (sizeof buf) - carryover); |
d0d6b7c5 JB |
2944 | else |
2945 | { | |
e7fbaa65 | 2946 | buf[carryover] = proc_buffered_char[channel]; |
d0d6b7c5 | 2947 | proc_buffered_char[channel] = -1; |
e7fbaa65 KH |
2948 | nbytes = read (channel, buf + carryover + 1, |
2949 | (sizeof buf) - carryover - 1); | |
1d2fc612 RS |
2950 | if (nbytes < 0) |
2951 | nbytes = 1; | |
d0d6b7c5 | 2952 | else |
1d2fc612 | 2953 | nbytes = nbytes + 1; |
d0d6b7c5 | 2954 | } |
0fa1789e | 2955 | chars = buf; |
d0d6b7c5 JB |
2956 | #endif /* not VMS */ |
2957 | ||
ca65341e KH |
2958 | XSETINT (p->decoding_carryover, 0); |
2959 | ||
1d2fc612 | 2960 | /* At this point, NBYTES holds number of characters just received |
0fa1789e | 2961 | (including the one in proc_buffered_char[channel]). */ |
de7fbd09 KH |
2962 | if (nbytes <= 0) |
2963 | { | |
2964 | if (nbytes < 0 || coding->mode & CODING_MODE_LAST_BLOCK) | |
2965 | return nbytes; | |
2966 | coding->mode |= CODING_MODE_LAST_BLOCK; | |
2967 | } | |
d0d6b7c5 | 2968 | |
1d2fc612 | 2969 | /* Now set NBYTES how many bytes we must decode. */ |
e7fbaa65 KH |
2970 | nbytes += carryover; |
2971 | nchars = nbytes; | |
0fa1789e | 2972 | |
e7fbaa65 | 2973 | if (CODING_MAY_REQUIRE_DECODING (coding)) |
0fa1789e | 2974 | { |
1d2fc612 | 2975 | int require = decoding_buffer_size (coding, nbytes); |
e7fbaa65 | 2976 | int result; |
0fa1789e | 2977 | |
fc932ac6 | 2978 | if (STRING_BYTES (XSTRING (p->decoding_buf)) < require) |
0fa1789e | 2979 | p->decoding_buf = make_uninit_string (require); |
e7fbaa65 | 2980 | result = decode_coding (coding, chars, XSTRING (p->decoding_buf)->data, |
fc932ac6 | 2981 | nbytes, STRING_BYTES (XSTRING (p->decoding_buf))); |
e7fbaa65 | 2982 | carryover = nbytes - coding->consumed; |
ca65341e KH |
2983 | if (carryover > 0) |
2984 | { | |
55fd5048 KH |
2985 | /* Copy the carryover bytes to the end of p->decoding_buf, to |
2986 | be processed on the next read. Since decoding_buffer_size | |
2987 | asks for an extra amount of space beyond the maximum | |
2988 | expected for the output, there should always be sufficient | |
2989 | space for the carryover (which is by definition a sequence | |
2990 | of bytes that was not long enough to be decoded, and thus | |
2991 | has a bounded length). */ | |
2992 | if (STRING_BYTES (XSTRING (p->decoding_buf)) | |
2993 | < coding->produced + carryover) | |
2994 | abort (); | |
2995 | bcopy (chars + coding->consumed, | |
2996 | XSTRING (p->decoding_buf)->data | |
2997 | + STRING_BYTES (XSTRING (p->decoding_buf)) - carryover, | |
ca65341e KH |
2998 | carryover); |
2999 | XSETINT (p->decoding_carryover, carryover); | |
3000 | } | |
0fa1789e | 3001 | |
e7fbaa65 | 3002 | /* A new coding system might be found by `decode_coding'. */ |
0fa1789e KH |
3003 | if (!EQ (p->decode_coding_system, coding->symbol)) |
3004 | { | |
3005 | p->decode_coding_system = coding->symbol; | |
77e1b3d4 RS |
3006 | |
3007 | /* Don't call setup_coding_system for | |
3008 | proc_decode_coding_system[channel] here. It is done in | |
3009 | detect_coding called via decode_coding above. */ | |
3010 | ||
e7fbaa65 | 3011 | /* If a coding system for encoding is not yet decided, we set |
486b111b KH |
3012 | it as the same as coding-system for decoding. |
3013 | ||
3014 | But, before doing that we must check if | |
3015 | proc_encode_coding_system[p->outfd] surely points to a | |
3016 | valid memory because p->outfd will be changed once EOF is | |
3017 | sent to the process. */ | |
3018 | if (NILP (p->encode_coding_system) | |
e6d6dff2 | 3019 | && proc_encode_coding_system[XINT (p->outfd)]) |
0fa1789e KH |
3020 | { |
3021 | p->encode_coding_system = coding->symbol; | |
3022 | setup_coding_system (coding->symbol, | |
e6d6dff2 | 3023 | proc_encode_coding_system[XINT (p->outfd)]); |
0fa1789e KH |
3024 | } |
3025 | } | |
1d2fc612 | 3026 | |
0fa1789e KH |
3027 | #ifdef VMS |
3028 | /* Now we don't need the contents of `chars'. */ | |
3029 | if (chars_allocated) | |
3030 | free (chars); | |
3031 | #endif | |
e7fbaa65 | 3032 | if (coding->produced == 0) |
0fa1789e | 3033 | return 0; |
d7223684 | 3034 | chars = (char *) XSTRING (p->decoding_buf)->data; |
e7fbaa65 | 3035 | nbytes = coding->produced; |
0d023da1 KH |
3036 | nchars = (coding->fake_multibyte |
3037 | ? multibyte_chars_in_text (chars, nbytes) | |
3038 | : coding->produced_char); | |
0fa1789e KH |
3039 | chars_in_decoding_buf = 1; |
3040 | } | |
8bc49fd1 | 3041 | else |
0fa1789e | 3042 | { |
8bc49fd1 KH |
3043 | #ifdef VMS |
3044 | if (chars_allocated) | |
3045 | { | |
3046 | /* Although we don't have to decode the received data, we | |
3047 | must move it to an area which we don't have to free. */ | |
3048 | if (! STRINGP (p->decoding_buf) | |
3049 | || STRING_BYTES (XSTRING (p->decoding_buf)) < nbytes) | |
3050 | p->decoding_buf = make_uninit_string (nbytes); | |
3051 | bcopy (chars, XSTRING (p->decoding_buf)->data, nbytes); | |
3052 | free (chars); | |
3053 | chars = XSTRING (p->decoding_buf)->data; | |
3054 | chars_in_decoding_buf = 1; | |
3055 | } | |
3056 | #endif | |
0d023da1 | 3057 | nchars = multibyte_chars_in_text (chars, nbytes); |
0fa1789e | 3058 | } |
0fa1789e | 3059 | |
486b111b KH |
3060 | Vlast_coding_system_used = coding->symbol; |
3061 | ||
52a1b894 EZ |
3062 | /* If the caller required, let the process associated buffer |
3063 | inherit the coding-system used to decode the process output. */ | |
aa91317a | 3064 | if (! NILP (p->inherit_coding_system_flag) |
52a1b894 EZ |
3065 | && !NILP (p->buffer) && !NILP (XBUFFER (p->buffer)->name)) |
3066 | { | |
3067 | struct buffer *prev_buf = current_buffer; | |
3068 | ||
3069 | Fset_buffer (p->buffer); | |
3070 | call1 (intern ("after-insert-file-set-buffer-file-coding-system"), | |
3071 | make_number (nbytes)); | |
3072 | set_buffer_internal (prev_buf); | |
3073 | } | |
3074 | ||
1d2fc612 | 3075 | /* Read and dispose of the process output. */ |
d0d6b7c5 JB |
3076 | outstream = p->filter; |
3077 | if (!NILP (outstream)) | |
3078 | { | |
3079 | /* We inhibit quit here instead of just catching it so that | |
3080 | hitting ^G when a filter happens to be running won't screw | |
3081 | it up. */ | |
3082 | int count = specpdl_ptr - specpdl; | |
30c78175 | 3083 | Lisp_Object odeactivate; |
dfc21838 | 3084 | Lisp_Object obuffer, okeymap; |
1d2fc612 | 3085 | Lisp_Object text; |
4da2f5be | 3086 | int outer_running_asynch_code = running_asynch_code; |
bbce7d72 | 3087 | int waiting = waiting_for_user_input_p; |
30c78175 | 3088 | |
dfc21838 RS |
3089 | /* No need to gcpro these, because all we do with them later |
3090 | is test them for EQness, and none of them should be a string. */ | |
30c78175 | 3091 | odeactivate = Vdeactivate_mark; |
dfc21838 RS |
3092 | XSETBUFFER (obuffer, current_buffer); |
3093 | okeymap = current_buffer->keymap; | |
30c78175 | 3094 | |
d0d6b7c5 | 3095 | specbind (Qinhibit_quit, Qt); |
6545aada | 3096 | specbind (Qlast_nonmenu_event, Qt); |
3b9a3dfa | 3097 | |
4da2f5be RS |
3098 | /* In case we get recursively called, |
3099 | and we already saved the match data nonrecursively, | |
3100 | save the same match data in safely recursive fashion. */ | |
3101 | if (outer_running_asynch_code) | |
3102 | { | |
3103 | Lisp_Object tem; | |
3104 | /* Don't clobber the CURRENT match data, either! */ | |
dd130227 | 3105 | tem = Fmatch_data (Qnil, Qnil); |
4da2f5be | 3106 | restore_match_data (); |
8f1ecd05 RS |
3107 | record_unwind_protect (Fset_match_data, Fmatch_data (Qnil, Qnil)); |
3108 | Fset_match_data (tem); | |
4da2f5be RS |
3109 | } |
3110 | ||
3111 | /* For speed, if a search happens within this code, | |
3112 | save the match data in a special nonrecursive fashion. */ | |
7074fde6 | 3113 | running_asynch_code = 1; |
4da2f5be | 3114 | |
51c6067d KH |
3115 | /* The multibyteness of a string given to the filter is decided |
3116 | by which coding system we used for decoding. */ | |
3117 | if (coding->type == coding_type_no_conversion | |
3118 | || coding->type == coding_type_raw_text) | |
3119 | text = make_unibyte_string (chars, nbytes); | |
3120 | else | |
3121 | text = make_multibyte_string (chars, nchars, nbytes); | |
3122 | ||
3b9a3dfa RS |
3123 | internal_condition_case_1 (read_process_output_call, |
3124 | Fcons (outstream, | |
1d2fc612 | 3125 | Fcons (proc, Fcons (text, Qnil))), |
3b9a3dfa RS |
3126 | !NILP (Vdebug_on_error) ? Qnil : Qerror, |
3127 | read_process_output_error_handler); | |
4da2f5be RS |
3128 | |
3129 | /* If we saved the match data nonrecursively, restore it now. */ | |
7074fde6 | 3130 | restore_match_data (); |
4da2f5be | 3131 | running_asynch_code = outer_running_asynch_code; |
d0d6b7c5 | 3132 | |
592ce97f | 3133 | /* Handling the process output should not deactivate the mark. */ |
30c78175 RS |
3134 | Vdeactivate_mark = odeactivate; |
3135 | ||
bbce7d72 RS |
3136 | /* Restore waiting_for_user_input_p as it was |
3137 | when we were called, in case the filter clobbered it. */ | |
3138 | waiting_for_user_input_p = waiting; | |
3139 | ||
7973cfa8 RS |
3140 | #if 0 /* Call record_asynch_buffer_change unconditionally, |
3141 | because we might have changed minor modes or other things | |
3142 | that affect key bindings. */ | |
dfc21838 RS |
3143 | if (! EQ (Fcurrent_buffer (), obuffer) |
3144 | || ! EQ (current_buffer->keymap, okeymap)) | |
7973cfa8 | 3145 | #endif |
927e08be RS |
3146 | /* But do it only if the caller is actually going to read events. |
3147 | Otherwise there's no need to make him wake up, and it could | |
3148 | cause trouble (for example it would make Fsit_for return). */ | |
3149 | if (waiting_for_user_input_p == -1) | |
3150 | record_asynch_buffer_change (); | |
d72534ba | 3151 | |
d0d6b7c5 JB |
3152 | #ifdef VMS |
3153 | start_vms_process_read (vs); | |
3154 | #endif | |
2ea6d561 | 3155 | unbind_to (count, Qnil); |
d0d6b7c5 JB |
3156 | return nchars; |
3157 | } | |
3158 | ||
3159 | /* If no filter, write into buffer if it isn't dead. */ | |
3160 | if (!NILP (p->buffer) && !NILP (XBUFFER (p->buffer)->name)) | |
3161 | { | |
b0310da4 | 3162 | Lisp_Object old_read_only; |
12ca5cdf | 3163 | int old_begv, old_zv; |
d8a2934e | 3164 | int old_begv_byte, old_zv_byte; |
30c78175 | 3165 | Lisp_Object odeactivate; |
d8a2934e RS |
3166 | int before, before_byte; |
3167 | int opoint_byte; | |
30c78175 RS |
3168 | |
3169 | odeactivate = Vdeactivate_mark; | |
d0d6b7c5 JB |
3170 | |
3171 | Fset_buffer (p->buffer); | |
6ec8bbd2 | 3172 | opoint = PT; |
d8a2934e | 3173 | opoint_byte = PT_BYTE; |
b0310da4 | 3174 | old_read_only = current_buffer->read_only; |
12ca5cdf RS |
3175 | old_begv = BEGV; |
3176 | old_zv = ZV; | |
d8a2934e RS |
3177 | old_begv_byte = BEGV_BYTE; |
3178 | old_zv_byte = ZV_BYTE; | |
b0310da4 JB |
3179 | |
3180 | current_buffer->read_only = Qnil; | |
d0d6b7c5 JB |
3181 | |
3182 | /* Insert new output into buffer | |
3183 | at the current end-of-output marker, | |
3184 | thus preserving logical ordering of input and output. */ | |
3185 | if (XMARKER (p->mark)->buffer) | |
d8a2934e RS |
3186 | SET_PT_BOTH (clip_to_bounds (BEGV, marker_position (p->mark), ZV), |
3187 | clip_to_bounds (BEGV_BYTE, marker_byte_position (p->mark), | |
3188 | ZV_BYTE)); | |
d0d6b7c5 | 3189 | else |
d8a2934e | 3190 | SET_PT_BOTH (ZV, ZV_BYTE); |
12ca5cdf | 3191 | before = PT; |
d8a2934e | 3192 | before_byte = PT_BYTE; |
b0310da4 JB |
3193 | |
3194 | /* If the output marker is outside of the visible region, save | |
3195 | the restriction and widen. */ | |
6ec8bbd2 | 3196 | if (! (BEGV <= PT && PT <= ZV)) |
b0310da4 JB |
3197 | Fwiden (); |
3198 | ||
8bc49fd1 KH |
3199 | if (NILP (current_buffer->enable_multibyte_characters)) |
3200 | nchars = nbytes; | |
3201 | ||
d0d6b7c5 JB |
3202 | /* Insert before markers in case we are inserting where |
3203 | the buffer's mark is, and the user's next command is Meta-y. */ | |
0fa1789e | 3204 | if (chars_in_decoding_buf) |
0d023da1 KH |
3205 | { |
3206 | /* Since multibyteness of p->docoding_buf is corrupted, we | |
3207 | can't use insert_from_string_before_markers. */ | |
3208 | char *temp_buf; | |
3209 | ||
3210 | temp_buf = (char *) alloca (nbytes); | |
3211 | bcopy (XSTRING (p->decoding_buf)->data, temp_buf, nbytes); | |
3212 | insert_before_markers (temp_buf, nbytes); | |
3213 | } | |
0fa1789e | 3214 | else |
1741e72d RS |
3215 | { |
3216 | insert_1_both (chars, nchars, nbytes, 0, 1, 1); | |
3217 | signal_after_change (opoint, 0, PT - opoint); | |
3218 | } | |
d8a2934e | 3219 | set_marker_both (p->mark, p->buffer, PT, PT_BYTE); |
b0310da4 | 3220 | |
d0d6b7c5 JB |
3221 | update_mode_lines++; |
3222 | ||
12ca5cdf RS |
3223 | /* Make sure opoint and the old restrictions |
3224 | float ahead of any new text just as point would. */ | |
3225 | if (opoint >= before) | |
d8a2934e RS |
3226 | { |
3227 | opoint += PT - before; | |
3228 | opoint_byte += PT_BYTE - before_byte; | |
3229 | } | |
12ca5cdf | 3230 | if (old_begv > before) |
d8a2934e RS |
3231 | { |
3232 | old_begv += PT - before; | |
3233 | old_begv_byte += PT_BYTE - before_byte; | |
3234 | } | |
12ca5cdf | 3235 | if (old_zv >= before) |
d8a2934e RS |
3236 | { |
3237 | old_zv += PT - before; | |
3238 | old_zv_byte += PT_BYTE - before_byte; | |
3239 | } | |
12ca5cdf | 3240 | |
b0310da4 | 3241 | /* If the restriction isn't what it should be, set it. */ |
12ca5cdf RS |
3242 | if (old_begv != BEGV || old_zv != ZV) |
3243 | Fnarrow_to_region (make_number (old_begv), make_number (old_zv)); | |
b0310da4 | 3244 | |
592ce97f | 3245 | /* Handling the process output should not deactivate the mark. */ |
30c78175 RS |
3246 | Vdeactivate_mark = odeactivate; |
3247 | ||
b0310da4 | 3248 | current_buffer->read_only = old_read_only; |
d8a2934e | 3249 | SET_PT_BOTH (opoint, opoint_byte); |
d0d6b7c5 JB |
3250 | set_buffer_internal (old); |
3251 | } | |
3252 | #ifdef VMS | |
3253 | start_vms_process_read (vs); | |
3254 | #endif | |
1d2fc612 | 3255 | return nbytes; |
d0d6b7c5 JB |
3256 | } |
3257 | ||
3258 | DEFUN ("waiting-for-user-input-p", Fwaiting_for_user_input_p, Swaiting_for_user_input_p, | |
3259 | 0, 0, 0, | |
8b4d685f | 3260 | "Returns non-nil if emacs is waiting for input from the user.\n\ |
d0d6b7c5 JB |
3261 | This is intended for use by asynchronous process output filters and sentinels.") |
3262 | () | |
3263 | { | |
8b4d685f | 3264 | return (waiting_for_user_input_p ? Qt : Qnil); |
d0d6b7c5 JB |
3265 | } |
3266 | \f | |
3267 | /* Sending data to subprocess */ | |
3268 | ||
3269 | jmp_buf send_process_frame; | |
3270 | ||
3271 | SIGTYPE | |
3272 | send_process_trap () | |
3273 | { | |
3274 | #ifdef BSD4_1 | |
3275 | sigrelse (SIGPIPE); | |
3276 | sigrelse (SIGALRM); | |
3277 | #endif /* BSD4_1 */ | |
3278 | longjmp (send_process_frame, 1); | |
3279 | } | |
3280 | ||
4556b700 RS |
3281 | /* Send some data to process PROC. |
3282 | BUF is the beginning of the data; LEN is the number of characters. | |
0fa1789e KH |
3283 | OBJECT is the Lisp object that the data comes from. |
3284 | ||
3285 | The data is encoded by PROC's coding-system for encoding before it | |
3286 | is sent. But if the data ends at the middle of multi-byte | |
3287 | representation, that incomplete sequence of bytes are sent without | |
3288 | being encoded. Should we store them in a buffer to prepend them to | |
3289 | the data send later? */ | |
4556b700 | 3290 | |
dfcf069d | 3291 | void |
4556b700 | 3292 | send_process (proc, buf, len, object) |
ecd1f654 | 3293 | volatile Lisp_Object proc; |
b684d043 | 3294 | unsigned char *buf; |
d0d6b7c5 | 3295 | int len; |
4556b700 | 3296 | Lisp_Object object; |
d0d6b7c5 | 3297 | { |
ecd1f654 | 3298 | /* Use volatile to protect variables from being clobbered by longjmp. */ |
d0d6b7c5 | 3299 | int rv; |
ecd1f654 | 3300 | volatile unsigned char *procname = XSTRING (XPROCESS (proc)->name)->data; |
0fa1789e | 3301 | struct coding_system *coding; |
6044e593 | 3302 | struct gcpro gcpro1; |
e7fbaa65 | 3303 | int carryover = XINT (XPROCESS (proc)->encoding_carryover); |
6044e593 RS |
3304 | |
3305 | GCPRO1 (object); | |
d0d6b7c5 | 3306 | |
d0d6b7c5 JB |
3307 | #ifdef VMS |
3308 | struct Lisp_Process *p = XPROCESS (proc); | |
3309 | VMS_PROC_STUFF *vs, *get_vms_process_pointer(); | |
3310 | #endif /* VMS */ | |
3311 | ||
3312 | if (! NILP (XPROCESS (proc)->raw_status_low)) | |
3313 | update_status (XPROCESS (proc)); | |
3314 | if (! EQ (XPROCESS (proc)->status, Qrun)) | |
3315 | error ("Process %s not running", procname); | |
0fa1789e KH |
3316 | if (XINT (XPROCESS (proc)->outfd) < 0) |
3317 | error ("Output file descriptor of %s is closed", procname); | |
3318 | ||
c7580538 | 3319 | coding = proc_encode_coding_system[XINT (XPROCESS (proc)->outfd)]; |
486b111b KH |
3320 | Vlast_coding_system_used = coding->symbol; |
3321 | ||
1a283a4c | 3322 | if (CODING_REQUIRE_ENCODING (coding)) |
0fa1789e KH |
3323 | { |
3324 | int require = encoding_buffer_size (coding, len); | |
41d03b9a | 3325 | int offset; |
b684d043 | 3326 | unsigned char *temp_buf = NULL; |
0fa1789e KH |
3327 | |
3328 | /* Remember the offset of data because a string or a buffer may | |
3329 | be relocated. Setting OFFSET to -1 means we don't have to | |
9660863d | 3330 | care about relocation. */ |
0fa1789e | 3331 | offset = (BUFFERP (object) |
d8a2934e | 3332 | ? BUF_PTR_BYTE_POS (XBUFFER (object), buf) |
0fa1789e | 3333 | : (STRINGP (object) |
9660863d | 3334 | ? buf - XSTRING (object)->data |
0fa1789e KH |
3335 | : -1)); |
3336 | ||
e7fbaa65 | 3337 | if (carryover > 0) |
0fa1789e | 3338 | { |
e7fbaa65 | 3339 | temp_buf = (unsigned char *) xmalloc (len + carryover); |
0fa1789e KH |
3340 | |
3341 | if (offset >= 0) | |
3342 | { | |
3343 | if (BUFFERP (object)) | |
d8a2934e | 3344 | buf = BUF_BYTE_ADDRESS (XBUFFER (object), offset); |
0fa1789e | 3345 | else if (STRINGP (object)) |
b684d043 | 3346 | buf = offset + XSTRING (object)->data; |
9660863d | 3347 | /* Now we don't have to care about relocation. */ |
0fa1789e KH |
3348 | offset = -1; |
3349 | } | |
e7fbaa65 | 3350 | bcopy ((XSTRING (XPROCESS (proc)->encoding_buf)->data |
fc932ac6 | 3351 | + STRING_BYTES (XSTRING (XPROCESS (proc)->encoding_buf)) |
e7fbaa65 KH |
3352 | - carryover), |
3353 | temp_buf, | |
3354 | carryover); | |
3355 | bcopy (buf, temp_buf + carryover, len); | |
0fa1789e KH |
3356 | buf = temp_buf; |
3357 | } | |
3358 | ||
fc932ac6 | 3359 | if (STRING_BYTES (XSTRING (XPROCESS (proc)->encoding_buf)) < require) |
0fa1789e KH |
3360 | { |
3361 | XPROCESS (proc)->encoding_buf = make_uninit_string (require); | |
3362 | ||
3363 | if (offset >= 0) | |
3364 | { | |
3365 | if (BUFFERP (object)) | |
d8a2934e | 3366 | buf = BUF_BYTE_ADDRESS (XBUFFER (object), offset); |
0fa1789e | 3367 | else if (STRINGP (object)) |
b684d043 | 3368 | buf = offset + XSTRING (object)->data; |
0fa1789e KH |
3369 | } |
3370 | } | |
3371 | object = XPROCESS (proc)->encoding_buf; | |
e7fbaa65 | 3372 | encode_coding (coding, buf, XSTRING (object)->data, |
fc932ac6 | 3373 | len, STRING_BYTES (XSTRING (object))); |
e7fbaa65 | 3374 | len = coding->produced; |
0fa1789e KH |
3375 | buf = XSTRING (object)->data; |
3376 | if (temp_buf) | |
3377 | xfree (temp_buf); | |
3378 | } | |
d0d6b7c5 JB |
3379 | |
3380 | #ifdef VMS | |
3381 | vs = get_vms_process_pointer (p->pid); | |
3382 | if (vs == 0) | |
3383 | error ("Could not find this process: %x", p->pid); | |
3384 | else if (write_to_vms_process (vs, buf, len)) | |
3385 | ; | |
3386 | #else | |
4556b700 RS |
3387 | |
3388 | if (pty_max_bytes == 0) | |
3389 | { | |
3390 | #if defined (HAVE_FPATHCONF) && defined (_PC_MAX_CANON) | |
3391 | pty_max_bytes = fpathconf (XFASTINT (XPROCESS (proc)->outfd), | |
3392 | _PC_MAX_CANON); | |
3393 | if (pty_max_bytes < 0) | |
3394 | pty_max_bytes = 250; | |
3395 | #else | |
3396 | pty_max_bytes = 250; | |
3397 | #endif | |
3398 | /* Deduct one, to leave space for the eof. */ | |
3399 | pty_max_bytes--; | |
3400 | } | |
3401 | ||
d0d6b7c5 JB |
3402 | if (!setjmp (send_process_frame)) |
3403 | while (len > 0) | |
3404 | { | |
3405 | int this = len; | |
4746118a | 3406 | SIGTYPE (*old_sigpipe)(); |
93b4f699 | 3407 | |
4556b700 RS |
3408 | /* Decide how much data we can send in one batch. |
3409 | Long lines need to be split into multiple batches. */ | |
3410 | if (!NILP (XPROCESS (proc)->pty_flag)) | |
93b4f699 | 3411 | { |
4556b700 RS |
3412 | /* Starting this at zero is always correct when not the first iteration |
3413 | because the previous iteration ended by sending C-d. | |
3414 | It may not be correct for the first iteration | |
3415 | if a partial line was sent in a separate send_process call. | |
3416 | If that proves worth handling, we need to save linepos | |
3417 | in the process object. */ | |
3418 | int linepos = 0; | |
b684d043 RS |
3419 | unsigned char *ptr = buf; |
3420 | unsigned char *end = buf + len; | |
4556b700 RS |
3421 | |
3422 | /* Scan through this text for a line that is too long. */ | |
3423 | while (ptr != end && linepos < pty_max_bytes) | |
3424 | { | |
3425 | if (*ptr == '\n') | |
3426 | linepos = 0; | |
3427 | else | |
3428 | linepos++; | |
3429 | ptr++; | |
3430 | } | |
3431 | /* If we found one, break the line there | |
3432 | and put in a C-d to force the buffer through. */ | |
3433 | this = ptr - buf; | |
93b4f699 RS |
3434 | } |
3435 | ||
4556b700 RS |
3436 | /* Send this batch, using one or more write calls. */ |
3437 | while (this > 0) | |
d0d6b7c5 | 3438 | { |
4556b700 RS |
3439 | old_sigpipe = (SIGTYPE (*) ()) signal (SIGPIPE, send_process_trap); |
3440 | rv = write (XINT (XPROCESS (proc)->outfd), buf, this); | |
3441 | signal (SIGPIPE, old_sigpipe); | |
3442 | ||
3443 | if (rv < 0) | |
3444 | { | |
3445 | if (0 | |
d0d6b7c5 | 3446 | #ifdef EWOULDBLOCK |
4556b700 | 3447 | || errno == EWOULDBLOCK |
d0d6b7c5 JB |
3448 | #endif |
3449 | #ifdef EAGAIN | |
4556b700 | 3450 | || errno == EAGAIN |
d0d6b7c5 | 3451 | #endif |
4556b700 RS |
3452 | ) |
3453 | /* Buffer is full. Wait, accepting input; | |
3454 | that may allow the program | |
3455 | to finish doing output and read more. */ | |
3456 | { | |
3457 | Lisp_Object zero; | |
3458 | int offset; | |
3459 | ||
3460 | /* Running filters might relocate buffers or strings. | |
3461 | Arrange to relocate BUF. */ | |
3462 | if (BUFFERP (object)) | |
d8a2934e | 3463 | offset = BUF_PTR_BYTE_POS (XBUFFER (object), buf); |
4556b700 | 3464 | else if (STRINGP (object)) |
b684d043 | 3465 | offset = buf - XSTRING (object)->data; |
4556b700 | 3466 | |
22719df2 | 3467 | XSETFASTINT (zero, 0); |
f3e6605c RS |
3468 | #ifdef EMACS_HAS_USECS |
3469 | wait_reading_process_input (0, 20000, zero, 0); | |
3470 | #else | |
4556b700 | 3471 | wait_reading_process_input (1, 0, zero, 0); |
f3e6605c | 3472 | #endif |
4556b700 RS |
3473 | |
3474 | if (BUFFERP (object)) | |
d8a2934e | 3475 | buf = BUF_BYTE_ADDRESS (XBUFFER (object), offset); |
4556b700 | 3476 | else if (STRINGP (object)) |
b684d043 | 3477 | buf = offset + XSTRING (object)->data; |
4556b700 RS |
3478 | |
3479 | rv = 0; | |
3480 | } | |
3481 | else | |
3482 | /* This is a real error. */ | |
3483 | report_file_error ("writing to process", Fcons (proc, Qnil)); | |
d0d6b7c5 | 3484 | } |
4556b700 RS |
3485 | buf += rv; |
3486 | len -= rv; | |
3487 | this -= rv; | |
d0d6b7c5 | 3488 | } |
f76475ad | 3489 | |
4556b700 RS |
3490 | /* If we sent just part of the string, put in an EOF |
3491 | to force it through, before we send the rest. */ | |
3492 | if (len > 0) | |
3493 | Fprocess_send_eof (proc); | |
d0d6b7c5 JB |
3494 | } |
3495 | #endif | |
3496 | else | |
3497 | { | |
3498 | XPROCESS (proc)->raw_status_low = Qnil; | |
3499 | XPROCESS (proc)->raw_status_high = Qnil; | |
3500 | XPROCESS (proc)->status = Fcons (Qexit, Fcons (make_number (256), Qnil)); | |
3501 | XSETINT (XPROCESS (proc)->tick, ++process_tick); | |
3502 | deactivate_process (proc); | |
3503 | #ifdef VMS | |
3504 | error ("Error writing to process %s; closed it", procname); | |
3505 | #else | |
3506 | error ("SIGPIPE raised on process %s; closed it", procname); | |
3507 | #endif | |
3508 | } | |
6044e593 RS |
3509 | |
3510 | UNGCPRO; | |
d0d6b7c5 JB |
3511 | } |
3512 | ||
3513 | DEFUN ("process-send-region", Fprocess_send_region, Sprocess_send_region, | |
3514 | 3, 3, 0, | |
3515 | "Send current contents of region as input to PROCESS.\n\ | |
ebb9e16f JB |
3516 | PROCESS may be a process, a buffer, the name of a process or buffer, or\n\ |
3517 | nil, indicating the current buffer's process.\n\ | |
d0d6b7c5 JB |
3518 | Called from program, takes three arguments, PROCESS, START and END.\n\ |
3519 | If the region is more than 500 characters long,\n\ | |
3520 | it is sent in several bunches. This may happen even for shorter regions.\n\ | |
3521 | Output from processes can arrive in between bunches.") | |
3522 | (process, start, end) | |
3523 | Lisp_Object process, start, end; | |
3524 | { | |
3525 | Lisp_Object proc; | |
d8a2934e | 3526 | int start1, end1; |
d0d6b7c5 JB |
3527 | |
3528 | proc = get_process (process); | |
3529 | validate_region (&start, &end); | |
3530 | ||
3531 | if (XINT (start) < GPT && XINT (end) > GPT) | |
4da6dec8 | 3532 | move_gap (XINT (start)); |
d0d6b7c5 | 3533 | |
d8a2934e RS |
3534 | start1 = CHAR_TO_BYTE (XINT (start)); |
3535 | end1 = CHAR_TO_BYTE (XINT (end)); | |
3536 | send_process (proc, BYTE_POS_ADDR (start1), end1 - start1, | |
4556b700 | 3537 | Fcurrent_buffer ()); |
d0d6b7c5 JB |
3538 | |
3539 | return Qnil; | |
3540 | } | |
3541 | ||
3542 | DEFUN ("process-send-string", Fprocess_send_string, Sprocess_send_string, | |
3543 | 2, 2, 0, | |
3544 | "Send PROCESS the contents of STRING as input.\n\ | |
ebb9e16f JB |
3545 | PROCESS may be a process, a buffer, the name of a process or buffer, or\n\ |
3546 | nil, indicating the current buffer's process.\n\ | |
d0d6b7c5 JB |
3547 | If STRING is more than 500 characters long,\n\ |
3548 | it is sent in several bunches. This may happen even for shorter strings.\n\ | |
3549 | Output from processes can arrive in between bunches.") | |
3550 | (process, string) | |
3551 | Lisp_Object process, string; | |
3552 | { | |
3553 | Lisp_Object proc; | |
3554 | CHECK_STRING (string, 1); | |
3555 | proc = get_process (process); | |
1d2fc612 | 3556 | send_process (proc, XSTRING (string)->data, |
fc932ac6 | 3557 | STRING_BYTES (XSTRING (string)), string); |
d0d6b7c5 JB |
3558 | return Qnil; |
3559 | } | |
3560 | \f | |
b81ea5ef RS |
3561 | DEFUN ("process-running-child-p", Fprocess_running_child_p, |
3562 | Sprocess_running_child_p, 0, 1, 0, | |
3563 | "Return t if PROCESS has given the terminal to a child.\n\ | |
3564 | If the operating system does not make it possible to find out,\n\ | |
3565 | return t unconditionally.") | |
3566 | (process) | |
3567 | Lisp_Object process; | |
3568 | { | |
3569 | /* Initialize in case ioctl doesn't exist or gives an error, | |
3570 | in a way that will cause returning t. */ | |
3571 | int gid = 0; | |
3572 | Lisp_Object proc; | |
3573 | struct Lisp_Process *p; | |
3574 | ||
3575 | proc = get_process (process); | |
3576 | p = XPROCESS (proc); | |
3577 | ||
3578 | if (!EQ (p->childp, Qt)) | |
3579 | error ("Process %s is not a subprocess", | |
3580 | XSTRING (p->name)->data); | |
3581 | if (XINT (p->infd) < 0) | |
3582 | error ("Process %s is not active", | |
3583 | XSTRING (p->name)->data); | |
3584 | ||
3585 | #ifdef TIOCGPGRP | |
3586 | if (!NILP (p->subtty)) | |
3587 | ioctl (XFASTINT (p->subtty), TIOCGPGRP, &gid); | |
3588 | else | |
3589 | ioctl (XINT (p->infd), TIOCGPGRP, &gid); | |
3590 | #endif /* defined (TIOCGPGRP ) */ | |
3591 | ||
3592 | if (gid == XFASTINT (p->pid)) | |
3593 | return Qnil; | |
3594 | return Qt; | |
3595 | } | |
3596 | \f | |
d0d6b7c5 | 3597 | /* send a signal number SIGNO to PROCESS. |
b81ea5ef RS |
3598 | If CURRENT_GROUP is t, that means send to the process group |
3599 | that currently owns the terminal being used to communicate with PROCESS. | |
d0d6b7c5 | 3600 | This is used for various commands in shell mode. |
b81ea5ef RS |
3601 | If CURRENT_GROUP is lambda, that means send to the process group |
3602 | that currently owns the terminal, but only if it is NOT the shell itself. | |
3603 | ||
d0d6b7c5 | 3604 | If NOMSG is zero, insert signal-announcements into process's buffers |
b0310da4 JB |
3605 | right away. |
3606 | ||
3607 | If we can, we try to signal PROCESS by sending control characters | |
e333e864 | 3608 | down the pty. This allows us to signal inferiors who have changed |
b0310da4 | 3609 | their uid, for which killpg would return an EPERM error. */ |
d0d6b7c5 | 3610 | |
f9738840 | 3611 | static void |
d0d6b7c5 JB |
3612 | process_send_signal (process, signo, current_group, nomsg) |
3613 | Lisp_Object process; | |
3614 | int signo; | |
3615 | Lisp_Object current_group; | |
3616 | int nomsg; | |
3617 | { | |
3618 | Lisp_Object proc; | |
3619 | register struct Lisp_Process *p; | |
3620 | int gid; | |
3621 | int no_pgrp = 0; | |
3622 | ||
3623 | proc = get_process (process); | |
3624 | p = XPROCESS (proc); | |
3625 | ||
3626 | if (!EQ (p->childp, Qt)) | |
3627 | error ("Process %s is not a subprocess", | |
3628 | XSTRING (p->name)->data); | |
a9f2c884 | 3629 | if (XINT (p->infd) < 0) |
d0d6b7c5 JB |
3630 | error ("Process %s is not active", |
3631 | XSTRING (p->name)->data); | |
3632 | ||
3633 | if (NILP (p->pty_flag)) | |
3634 | current_group = Qnil; | |
3635 | ||
d0d6b7c5 JB |
3636 | /* If we are using pgrps, get a pgrp number and make it negative. */ |
3637 | if (!NILP (current_group)) | |
3638 | { | |
b0310da4 | 3639 | #ifdef SIGNALS_VIA_CHARACTERS |
d0d6b7c5 JB |
3640 | /* If possible, send signals to the entire pgrp |
3641 | by sending an input character to it. */ | |
b0310da4 | 3642 | |
6be429b1 JB |
3643 | /* TERMIOS is the latest and bestest, and seems most likely to |
3644 | work. If the system has it, use it. */ | |
3645 | #ifdef HAVE_TERMIOS | |
3646 | struct termios t; | |
3647 | ||
3648 | switch (signo) | |
3649 | { | |
3650 | case SIGINT: | |
a9f2c884 | 3651 | tcgetattr (XINT (p->infd), &t); |
4556b700 | 3652 | send_process (proc, &t.c_cc[VINTR], 1, Qnil); |
a87b802f | 3653 | return; |
6be429b1 JB |
3654 | |
3655 | case SIGQUIT: | |
a9f2c884 | 3656 | tcgetattr (XINT (p->infd), &t); |
4556b700 | 3657 | send_process (proc, &t.c_cc[VQUIT], 1, Qnil); |
a87b802f | 3658 | return; |
6be429b1 JB |
3659 | |
3660 | case SIGTSTP: | |
a9f2c884 | 3661 | tcgetattr (XINT (p->infd), &t); |
d0adf46f | 3662 | #if defined (VSWTCH) && !defined (PREFER_VSUSP) |
4556b700 | 3663 | send_process (proc, &t.c_cc[VSWTCH], 1, Qnil); |
6be429b1 | 3664 | #else |
4556b700 | 3665 | send_process (proc, &t.c_cc[VSUSP], 1, Qnil); |
6be429b1 | 3666 | #endif |
a87b802f | 3667 | return; |
6be429b1 JB |
3668 | } |
3669 | ||
3670 | #else /* ! HAVE_TERMIOS */ | |
3671 | ||
b0310da4 JB |
3672 | /* On Berkeley descendants, the following IOCTL's retrieve the |
3673 | current control characters. */ | |
d0d6b7c5 | 3674 | #if defined (TIOCGLTC) && defined (TIOCGETC) |
b0310da4 | 3675 | |
d0d6b7c5 JB |
3676 | struct tchars c; |
3677 | struct ltchars lc; | |
3678 | ||
3679 | switch (signo) | |
3680 | { | |
3681 | case SIGINT: | |
a9f2c884 | 3682 | ioctl (XINT (p->infd), TIOCGETC, &c); |
4556b700 | 3683 | send_process (proc, &c.t_intrc, 1, Qnil); |
f9738840 | 3684 | return; |
d0d6b7c5 | 3685 | case SIGQUIT: |
a9f2c884 | 3686 | ioctl (XINT (p->infd), TIOCGETC, &c); |
4556b700 | 3687 | send_process (proc, &c.t_quitc, 1, Qnil); |
f9738840 | 3688 | return; |
0ad77c54 | 3689 | #ifdef SIGTSTP |
d0d6b7c5 | 3690 | case SIGTSTP: |
a9f2c884 | 3691 | ioctl (XINT (p->infd), TIOCGLTC, &lc); |
4556b700 | 3692 | send_process (proc, &lc.t_suspc, 1, Qnil); |
f9738840 | 3693 | return; |
b0310da4 | 3694 | #endif /* ! defined (SIGTSTP) */ |
d0d6b7c5 | 3695 | } |
b0310da4 JB |
3696 | |
3697 | #else /* ! defined (TIOCGLTC) && defined (TIOCGETC) */ | |
3698 | ||
3699 | /* On SYSV descendants, the TCGETA ioctl retrieves the current control | |
3700 | characters. */ | |
3701 | #ifdef TCGETA | |
d0d6b7c5 JB |
3702 | struct termio t; |
3703 | switch (signo) | |
3704 | { | |
3705 | case SIGINT: | |
a9f2c884 | 3706 | ioctl (XINT (p->infd), TCGETA, &t); |
4556b700 | 3707 | send_process (proc, &t.c_cc[VINTR], 1, Qnil); |
f9738840 | 3708 | return; |
d0d6b7c5 | 3709 | case SIGQUIT: |
a9f2c884 | 3710 | ioctl (XINT (p->infd), TCGETA, &t); |
4556b700 | 3711 | send_process (proc, &t.c_cc[VQUIT], 1, Qnil); |
f9738840 | 3712 | return; |
7d79e3b4 | 3713 | #ifdef SIGTSTP |
d0d6b7c5 | 3714 | case SIGTSTP: |
a9f2c884 | 3715 | ioctl (XINT (p->infd), TCGETA, &t); |
4556b700 | 3716 | send_process (proc, &t.c_cc[VSWTCH], 1, Qnil); |
f9738840 | 3717 | return; |
b0310da4 | 3718 | #endif /* ! defined (SIGTSTP) */ |
d0d6b7c5 | 3719 | } |
b0310da4 JB |
3720 | #else /* ! defined (TCGETA) */ |
3721 | Your configuration files are messed up. | |
3722 | /* If your system configuration files define SIGNALS_VIA_CHARACTERS, | |
3723 | you'd better be using one of the alternatives above! */ | |
3724 | #endif /* ! defined (TCGETA) */ | |
3725 | #endif /* ! defined (TIOCGLTC) && defined (TIOCGETC) */ | |
6be429b1 | 3726 | #endif /* ! defined HAVE_TERMIOS */ |
b0310da4 | 3727 | #endif /* ! defined (SIGNALS_VIA_CHARACTERS) */ |
d0d6b7c5 | 3728 | |
301c3fe4 | 3729 | #ifdef TIOCGPGRP |
d0d6b7c5 JB |
3730 | /* Get the pgrp using the tty itself, if we have that. |
3731 | Otherwise, use the pty to get the pgrp. | |
3732 | On pfa systems, saka@pfu.fujitsu.co.JP writes: | |
b0310da4 JB |
3733 | "TIOCGPGRP symbol defined in sys/ioctl.h at E50. |
3734 | But, TIOCGPGRP does not work on E50 ;-P works fine on E60" | |
d0d6b7c5 JB |
3735 | His patch indicates that if TIOCGPGRP returns an error, then |
3736 | we should just assume that p->pid is also the process group id. */ | |
3737 | { | |
3738 | int err; | |
3739 | ||
3740 | if (!NILP (p->subtty)) | |
3741 | err = ioctl (XFASTINT (p->subtty), TIOCGPGRP, &gid); | |
3742 | else | |
a9f2c884 | 3743 | err = ioctl (XINT (p->infd), TIOCGPGRP, &gid); |
d0d6b7c5 JB |
3744 | |
3745 | #ifdef pfa | |
3746 | if (err == -1) | |
3747 | gid = - XFASTINT (p->pid); | |
301c3fe4 | 3748 | #endif /* ! defined (pfa) */ |
d0d6b7c5 JB |
3749 | } |
3750 | if (gid == -1) | |
3751 | no_pgrp = 1; | |
3752 | else | |
3753 | gid = - gid; | |
b0310da4 | 3754 | #else /* ! defined (TIOCGPGRP ) */ |
301c3fe4 JB |
3755 | /* Can't select pgrps on this system, so we know that |
3756 | the child itself heads the pgrp. */ | |
3757 | gid = - XFASTINT (p->pid); | |
3758 | #endif /* ! defined (TIOCGPGRP ) */ | |
b81ea5ef RS |
3759 | |
3760 | /* If current_group is lambda, and the shell owns the terminal, | |
3761 | don't send any signal. */ | |
3762 | if (EQ (current_group, Qlambda) && gid == - XFASTINT (p->pid)) | |
3763 | return; | |
d0d6b7c5 JB |
3764 | } |
3765 | else | |
3766 | gid = - XFASTINT (p->pid); | |
d0d6b7c5 JB |
3767 | |
3768 | switch (signo) | |
3769 | { | |
3770 | #ifdef SIGCONT | |
3771 | case SIGCONT: | |
3772 | p->raw_status_low = Qnil; | |
3773 | p->raw_status_high = Qnil; | |
3774 | p->status = Qrun; | |
3775 | XSETINT (p->tick, ++process_tick); | |
3776 | if (!nomsg) | |
3777 | status_notify (); | |
3778 | break; | |
301c3fe4 | 3779 | #endif /* ! defined (SIGCONT) */ |
d0d6b7c5 JB |
3780 | case SIGINT: |
3781 | #ifdef VMS | |
4556b700 | 3782 | send_process (proc, "\003", 1, Qnil); /* ^C */ |
d0d6b7c5 JB |
3783 | goto whoosh; |
3784 | #endif | |
3785 | case SIGQUIT: | |
3786 | #ifdef VMS | |
4556b700 | 3787 | send_process (proc, "\031", 1, Qnil); /* ^Y */ |
d0d6b7c5 JB |
3788 | goto whoosh; |
3789 | #endif | |
3790 | case SIGKILL: | |
3791 | #ifdef VMS | |
3792 | sys$forcex (&(XFASTINT (p->pid)), 0, 1); | |
3793 | whoosh: | |
3794 | #endif | |
a9f2c884 | 3795 | flush_pending_output (XINT (p->infd)); |
d0d6b7c5 JB |
3796 | break; |
3797 | } | |
3798 | ||
3799 | /* If we don't have process groups, send the signal to the immediate | |
3800 | subprocess. That isn't really right, but it's better than any | |
3801 | obvious alternative. */ | |
3802 | if (no_pgrp) | |
3803 | { | |
3804 | kill (XFASTINT (p->pid), signo); | |
3805 | return; | |
3806 | } | |
3807 | ||
3808 | /* gid may be a pid, or minus a pgrp's number */ | |
3809 | #ifdef TIOCSIGSEND | |
3810 | if (!NILP (current_group)) | |
a9f2c884 | 3811 | ioctl (XINT (p->infd), TIOCSIGSEND, signo); |
d0d6b7c5 JB |
3812 | else |
3813 | { | |
3814 | gid = - XFASTINT (p->pid); | |
3815 | kill (gid, signo); | |
3816 | } | |
301c3fe4 | 3817 | #else /* ! defined (TIOCSIGSEND) */ |
d0d6b7c5 | 3818 | EMACS_KILLPG (-gid, signo); |
301c3fe4 | 3819 | #endif /* ! defined (TIOCSIGSEND) */ |
d0d6b7c5 JB |
3820 | } |
3821 | ||
3822 | DEFUN ("interrupt-process", Finterrupt_process, Sinterrupt_process, 0, 2, 0, | |
7744ca33 | 3823 | "Interrupt process PROCESS.\n\ |
ebb9e16f | 3824 | PROCESS may be a process, a buffer, or the name of a process or buffer.\n\ |
e333e864 | 3825 | nil or no arg means current buffer's process.\n\ |
d0d6b7c5 JB |
3826 | Second arg CURRENT-GROUP non-nil means send signal to\n\ |
3827 | the current process-group of the process's controlling terminal\n\ | |
3828 | rather than to the process's own process group.\n\ | |
3829 | If the process is a shell, this means interrupt current subjob\n\ | |
b81ea5ef RS |
3830 | rather than the shell.\n\ |
3831 | \n\ | |
3832 | If CURRENT-GROUP is `lambda', and if the shell owns the terminal,\n\ | |
3833 | don't send the signal.") | |
d0d6b7c5 JB |
3834 | (process, current_group) |
3835 | Lisp_Object process, current_group; | |
3836 | { | |
3837 | process_send_signal (process, SIGINT, current_group, 0); | |
3838 | return process; | |
3839 | } | |
3840 | ||
3841 | DEFUN ("kill-process", Fkill_process, Skill_process, 0, 2, 0, | |
3842 | "Kill process PROCESS. May be process or name of one.\n\ | |
3843 | See function `interrupt-process' for more details on usage.") | |
3844 | (process, current_group) | |
3845 | Lisp_Object process, current_group; | |
3846 | { | |
3847 | process_send_signal (process, SIGKILL, current_group, 0); | |
3848 | return process; | |
3849 | } | |
3850 | ||
3851 | DEFUN ("quit-process", Fquit_process, Squit_process, 0, 2, 0, | |
3852 | "Send QUIT signal to process PROCESS. May be process or name of one.\n\ | |
3853 | See function `interrupt-process' for more details on usage.") | |
3854 | (process, current_group) | |
3855 | Lisp_Object process, current_group; | |
3856 | { | |
3857 | process_send_signal (process, SIGQUIT, current_group, 0); | |
3858 | return process; | |
3859 | } | |
3860 | ||
3861 | DEFUN ("stop-process", Fstop_process, Sstop_process, 0, 2, 0, | |
3862 | "Stop process PROCESS. May be process or name of one.\n\ | |
3863 | See function `interrupt-process' for more details on usage.") | |
3864 | (process, current_group) | |
3865 | Lisp_Object process, current_group; | |
3866 | { | |
3867 | #ifndef SIGTSTP | |
3868 | error ("no SIGTSTP support"); | |
3869 | #else | |
3870 | process_send_signal (process, SIGTSTP, current_group, 0); | |
3871 | #endif | |
3872 | return process; | |
3873 | } | |
3874 | ||
3875 | DEFUN ("continue-process", Fcontinue_process, Scontinue_process, 0, 2, 0, | |
3876 | "Continue process PROCESS. May be process or name of one.\n\ | |
3877 | See function `interrupt-process' for more details on usage.") | |
3878 | (process, current_group) | |
3879 | Lisp_Object process, current_group; | |
3880 | { | |
3881 | #ifdef SIGCONT | |
3882 | process_send_signal (process, SIGCONT, current_group, 0); | |
3883 | #else | |
3884 | error ("no SIGCONT support"); | |
3885 | #endif | |
3886 | return process; | |
3887 | } | |
3888 | ||
3889 | DEFUN ("signal-process", Fsignal_process, Ssignal_process, | |
3890 | 2, 2, "nProcess number: \nnSignal code: ", | |
4766242d RS |
3891 | "Send the process with process id PID the signal with code SIGCODE.\n\ |
3892 | PID must be an integer. The process need not be a child of this Emacs.\n\ | |
3893 | SIGCODE may be an integer, or a symbol whose name is a signal name.") | |
3894 | (pid, sigcode) | |
3895 | Lisp_Object pid, sigcode; | |
d0d6b7c5 JB |
3896 | { |
3897 | CHECK_NUMBER (pid, 0); | |
4766242d RS |
3898 | |
3899 | #define handle_signal(NAME, VALUE) \ | |
3900 | else if (!strcmp (name, NAME)) \ | |
3901 | XSETINT (sigcode, VALUE) | |
3902 | ||
3903 | if (INTEGERP (sigcode)) | |
3904 | ; | |
3905 | else | |
3906 | { | |
3907 | unsigned char *name; | |
3908 | ||
3909 | CHECK_SYMBOL (sigcode, 1); | |
3910 | name = XSYMBOL (sigcode)->name->data; | |
3911 | ||
3912 | if (0) | |
3913 | ; | |
3914 | #ifdef SIGHUP | |
3915 | handle_signal ("SIGHUP", SIGHUP); | |
3916 | #endif | |
3917 | #ifdef SIGINT | |
3918 | handle_signal ("SIGINT", SIGINT); | |
3919 | #endif | |
3920 | #ifdef SIGQUIT | |
3921 | handle_signal ("SIGQUIT", SIGQUIT); | |
3922 | #endif | |
3923 | #ifdef SIGILL | |
3924 | handle_signal ("SIGILL", SIGILL); | |
3925 | #endif | |
3926 | #ifdef SIGABRT | |
3927 | handle_signal ("SIGABRT", SIGABRT); | |
3928 | #endif | |
3929 | #ifdef SIGEMT | |
3930 | handle_signal ("SIGEMT", SIGEMT); | |
3931 | #endif | |
3932 | #ifdef SIGKILL | |
3933 | handle_signal ("SIGKILL", SIGKILL); | |
3934 | #endif | |
3935 | #ifdef SIGFPE | |
3936 | handle_signal ("SIGFPE", SIGFPE); | |
3937 | #endif | |
3938 | #ifdef SIGBUS | |
3939 | handle_signal ("SIGBUS", SIGBUS); | |
3940 | #endif | |
3941 | #ifdef SIGSEGV | |
3942 | handle_signal ("SIGSEGV", SIGSEGV); | |
3943 | #endif | |
3944 | #ifdef SIGSYS | |
3945 | handle_signal ("SIGSYS", SIGSYS); | |
3946 | #endif | |
3947 | #ifdef SIGPIPE | |
3948 | handle_signal ("SIGPIPE", SIGPIPE); | |
3949 | #endif | |
3950 | #ifdef SIGALRM | |
3951 | handle_signal ("SIGALRM", SIGALRM); | |
3952 | #endif | |
3953 | #ifdef SIGTERM | |
3954 | handle_signal ("SIGTERM", SIGTERM); | |
3955 | #endif | |
3956 | #ifdef SIGURG | |
3957 | handle_signal ("SIGURG", SIGURG); | |
3958 | #endif | |
3959 | #ifdef SIGSTOP | |
3960 | handle_signal ("SIGSTOP", SIGSTOP); | |
3961 | #endif | |
3962 | #ifdef SIGTSTP | |
3963 | handle_signal ("SIGTSTP", SIGTSTP); | |
3964 | #endif | |
3965 | #ifdef SIGCONT | |
3966 | handle_signal ("SIGCONT", SIGCONT); | |
3967 | #endif | |
3968 | #ifdef SIGCHLD | |
3969 | handle_signal ("SIGCHLD", SIGCHLD); | |
3970 | #endif | |
3971 | #ifdef SIGTTIN | |
3972 | handle_signal ("SIGTTIN", SIGTTIN); | |
3973 | #endif | |
3974 | #ifdef SIGTTOU | |
3975 | handle_signal ("SIGTTOU", SIGTTOU); | |
3976 | #endif | |
3977 | #ifdef SIGIO | |
3978 | handle_signal ("SIGIO", SIGIO); | |
3979 | #endif | |
3980 | #ifdef SIGXCPU | |
3981 | handle_signal ("SIGXCPU", SIGXCPU); | |
3982 | #endif | |
3983 | #ifdef SIGXFSZ | |
3984 | handle_signal ("SIGXFSZ", SIGXFSZ); | |
3985 | #endif | |
3986 | #ifdef SIGVTALRM | |
3987 | handle_signal ("SIGVTALRM", SIGVTALRM); | |
3988 | #endif | |
3989 | #ifdef SIGPROF | |
3990 | handle_signal ("SIGPROF", SIGPROF); | |
3991 | #endif | |
3992 | #ifdef SIGWINCH | |
3993 | handle_signal ("SIGWINCH", SIGWINCH); | |
3994 | #endif | |
3995 | #ifdef SIGINFO | |
3996 | handle_signal ("SIGINFO", SIGINFO); | |
3997 | #endif | |
3998 | #ifdef SIGUSR1 | |
3999 | handle_signal ("SIGUSR1", SIGUSR1); | |
4000 | #endif | |
4001 | #ifdef SIGUSR2 | |
4002 | handle_signal ("SIGUSR2", SIGUSR2); | |
4003 | #endif | |
4004 | else | |
9fa195a2 | 4005 | error ("Undefined signal name %s", name); |
4766242d RS |
4006 | } |
4007 | ||
4008 | #undef handle_signal | |
4009 | ||
4766242d | 4010 | return make_number (kill (XINT (pid), XINT (sigcode))); |
d0d6b7c5 JB |
4011 | } |
4012 | ||
4013 | DEFUN ("process-send-eof", Fprocess_send_eof, Sprocess_send_eof, 0, 1, 0, | |
4014 | "Make PROCESS see end-of-file in its input.\n\ | |
7744ca33 | 4015 | EOF comes after any text already sent to it.\n\ |
ebb9e16f | 4016 | PROCESS may be a process, a buffer, the name of a process or buffer, or\n\ |
d33a00f2 RS |
4017 | nil, indicating the current buffer's process.\n\ |
4018 | If PROCESS is a network connection, or is a process communicating\n\ | |
4019 | through a pipe (as opposed to a pty), then you cannot send any more\n\ | |
4020 | text to PROCESS after you call this function.") | |
d0d6b7c5 JB |
4021 | (process) |
4022 | Lisp_Object process; | |
4023 | { | |
4024 | Lisp_Object proc; | |
de7fbd09 | 4025 | struct coding_system *coding; |
d0d6b7c5 JB |
4026 | |
4027 | proc = get_process (process); | |
de7fbd09 | 4028 | coding = proc_encode_coding_system[XINT (XPROCESS (proc)->outfd)]; |
577d03d5 RS |
4029 | |
4030 | /* Make sure the process is really alive. */ | |
4031 | if (! NILP (XPROCESS (proc)->raw_status_low)) | |
4032 | update_status (XPROCESS (proc)); | |
4033 | if (! EQ (XPROCESS (proc)->status, Qrun)) | |
dcf970e6 | 4034 | error ("Process %s not running", XSTRING (XPROCESS (proc)->name)->data); |
577d03d5 | 4035 | |
de7fbd09 KH |
4036 | if (CODING_REQUIRE_FLUSHING (coding)) |
4037 | { | |
4038 | coding->mode |= CODING_MODE_LAST_BLOCK; | |
4039 | send_process (proc, "", 0, Qnil); | |
4040 | } | |
4041 | ||
d0d6b7c5 | 4042 | #ifdef VMS |
4556b700 | 4043 | send_process (proc, "\032", 1, Qnil); /* ^z */ |
d0d6b7c5 JB |
4044 | #else |
4045 | if (!NILP (XPROCESS (proc)->pty_flag)) | |
4556b700 | 4046 | send_process (proc, "\004", 1, Qnil); |
d0d6b7c5 JB |
4047 | else |
4048 | { | |
4525f571 RS |
4049 | int old_outfd, new_outfd; |
4050 | ||
93853f3d | 4051 | #ifdef HAVE_SHUTDOWN |
02f55c4b RS |
4052 | /* If this is a network connection, or socketpair is used |
4053 | for communication with the subprocess, call shutdown to cause EOF. | |
4054 | (In some old system, shutdown to socketpair doesn't work. | |
4055 | Then we just can't win.) */ | |
4056 | if (NILP (XPROCESS (proc)->pid) | |
4057 | || XINT (XPROCESS (proc)->outfd) == XINT (XPROCESS (proc)->infd)) | |
4058 | shutdown (XINT (XPROCESS (proc)->outfd), 1); | |
4059 | /* In case of socketpair, outfd == infd, so don't close it. */ | |
4060 | if (XINT (XPROCESS (proc)->outfd) != XINT (XPROCESS (proc)->infd)) | |
4061 | close (XINT (XPROCESS (proc)->outfd)); | |
93853f3d RS |
4062 | #else /* not HAVE_SHUTDOWN */ |
4063 | close (XINT (XPROCESS (proc)->outfd)); | |
4064 | #endif /* not HAVE_SHUTDOWN */ | |
4525f571 RS |
4065 | new_outfd = open (NULL_DEVICE, O_WRONLY); |
4066 | old_outfd = XINT (XPROCESS (proc)->outfd); | |
4067 | ||
4068 | if (!proc_encode_coding_system[new_outfd]) | |
4069 | proc_encode_coding_system[new_outfd] | |
4070 | = (struct coding_system *) xmalloc (sizeof (struct coding_system)); | |
4071 | bcopy (proc_encode_coding_system[old_outfd], | |
4072 | proc_encode_coding_system[new_outfd], | |
4073 | sizeof (struct coding_system)); | |
4074 | bzero (proc_encode_coding_system[old_outfd], | |
4075 | sizeof (struct coding_system)); | |
4076 | ||
4077 | XSETINT (XPROCESS (proc)->outfd, new_outfd); | |
d0d6b7c5 JB |
4078 | } |
4079 | #endif /* VMS */ | |
d0d6b7c5 JB |
4080 | return process; |
4081 | } | |
4082 | ||
4083 | /* Kill all processes associated with `buffer'. | |
4084 | If `buffer' is nil, kill all processes */ | |
4085 | ||
6b53bb85 | 4086 | void |
d0d6b7c5 JB |
4087 | kill_buffer_processes (buffer) |
4088 | Lisp_Object buffer; | |
4089 | { | |
4090 | Lisp_Object tail, proc; | |
4091 | ||
70949dac | 4092 | for (tail = Vprocess_alist; GC_CONSP (tail); tail = XCDR (tail)) |
d0d6b7c5 | 4093 | { |
70949dac | 4094 | proc = XCDR (XCAR (tail)); |
b5b502d6 | 4095 | if (GC_PROCESSP (proc) |
d0d6b7c5 JB |
4096 | && (NILP (buffer) || EQ (XPROCESS (proc)->buffer, buffer))) |
4097 | { | |
4098 | if (NETCONN_P (proc)) | |
e1ab4959 | 4099 | Fdelete_process (proc); |
a9f2c884 | 4100 | else if (XINT (XPROCESS (proc)->infd) >= 0) |
d0d6b7c5 JB |
4101 | process_send_signal (proc, SIGHUP, Qnil, 1); |
4102 | } | |
4103 | } | |
4104 | } | |
4105 | \f | |
4106 | /* On receipt of a signal that a child status has changed, | |
4107 | loop asking about children with changed statuses until | |
4108 | the system says there are no more. | |
4109 | All we do is change the status; | |
4110 | we do not run sentinels or print notifications. | |
4111 | That is saved for the next time keyboard input is done, | |
4112 | in order to avoid timing errors. */ | |
4113 | ||
4114 | /** WARNING: this can be called during garbage collection. | |
4115 | Therefore, it must not be fooled by the presence of mark bits in | |
4116 | Lisp objects. */ | |
4117 | ||
4118 | /** USG WARNING: Although it is not obvious from the documentation | |
4119 | in signal(2), on a USG system the SIGCLD handler MUST NOT call | |
4120 | signal() before executing at least one wait(), otherwise the handler | |
4121 | will be called again, resulting in an infinite loop. The relevant | |
4122 | portion of the documentation reads "SIGCLD signals will be queued | |
4123 | and the signal-catching function will be continually reentered until | |
4124 | the queue is empty". Invoking signal() causes the kernel to reexamine | |
4125 | the SIGCLD queue. Fred Fish, UniSoft Systems Inc. */ | |
4126 | ||
4127 | SIGTYPE | |
4128 | sigchld_handler (signo) | |
4129 | int signo; | |
4130 | { | |
4131 | int old_errno = errno; | |
4132 | Lisp_Object proc; | |
4133 | register struct Lisp_Process *p; | |
6be429b1 | 4134 | extern EMACS_TIME *input_available_clear_time; |
d0d6b7c5 JB |
4135 | |
4136 | #ifdef BSD4_1 | |
4137 | extern int sigheld; | |
4138 | sigheld |= sigbit (SIGCHLD); | |
4139 | #endif | |
4140 | ||
4141 | while (1) | |
4142 | { | |
4143 | register int pid; | |
4144 | WAITTYPE w; | |
4145 | Lisp_Object tail; | |
4146 | ||
4147 | #ifdef WNOHANG | |
4148 | #ifndef WUNTRACED | |
4149 | #define WUNTRACED 0 | |
4150 | #endif /* no WUNTRACED */ | |
4151 | /* Keep trying to get a status until we get a definitive result. */ | |
4152 | do | |
4153 | { | |
4154 | errno = 0; | |
4155 | pid = wait3 (&w, WNOHANG | WUNTRACED, 0); | |
4156 | } | |
4157 | while (pid <= 0 && errno == EINTR); | |
4158 | ||
4159 | if (pid <= 0) | |
4160 | { | |
4161 | /* A real failure. We have done all our job, so return. */ | |
4162 | ||
4163 | /* USG systems forget handlers when they are used; | |
4164 | must reestablish each time */ | |
3c0ee47b | 4165 | #if defined (USG) && !defined (POSIX_SIGNALS) |
d0d6b7c5 JB |
4166 | signal (signo, sigchld_handler); /* WARNING - must come after wait3() */ |
4167 | #endif | |
4168 | #ifdef BSD4_1 | |
4169 | sigheld &= ~sigbit (SIGCHLD); | |
4170 | sigrelse (SIGCHLD); | |
4171 | #endif | |
4172 | errno = old_errno; | |
4173 | return; | |
4174 | } | |
4175 | #else | |
4176 | pid = wait (&w); | |
4177 | #endif /* no WNOHANG */ | |
4178 | ||
4179 | /* Find the process that signaled us, and record its status. */ | |
4180 | ||
4181 | p = 0; | |
70949dac | 4182 | for (tail = Vprocess_alist; CONSP (tail); tail = XCDR (tail)) |
d0d6b7c5 | 4183 | { |
70949dac | 4184 | proc = XCDR (XCAR (tail)); |
d0d6b7c5 JB |
4185 | p = XPROCESS (proc); |
4186 | if (EQ (p->childp, Qt) && XFASTINT (p->pid) == pid) | |
4187 | break; | |
4188 | p = 0; | |
4189 | } | |
4190 | ||
4191 | /* Look for an asynchronous process whose pid hasn't been filled | |
4192 | in yet. */ | |
4193 | if (p == 0) | |
70949dac | 4194 | for (tail = Vprocess_alist; CONSP (tail); tail = XCDR (tail)) |
d0d6b7c5 | 4195 | { |
70949dac | 4196 | proc = XCDR (XCAR (tail)); |
d0d6b7c5 | 4197 | p = XPROCESS (proc); |
bcd69aea | 4198 | if (INTEGERP (p->pid) && XINT (p->pid) == -1) |
d0d6b7c5 JB |
4199 | break; |
4200 | p = 0; | |
4201 | } | |
4202 | ||
4203 | /* Change the status of the process that was found. */ | |
4204 | if (p != 0) | |
4205 | { | |
4206 | union { int i; WAITTYPE wt; } u; | |
e98d950b | 4207 | int clear_desc_flag = 0; |
d0d6b7c5 JB |
4208 | |
4209 | XSETINT (p->tick, ++process_tick); | |
4210 | u.wt = w; | |
5fc0154c RS |
4211 | XSETINT (p->raw_status_low, u.i & 0xffff); |
4212 | XSETINT (p->raw_status_high, u.i >> 16); | |
d0d6b7c5 JB |
4213 | |
4214 | /* If process has terminated, stop waiting for its output. */ | |
e98d950b RS |
4215 | if ((WIFSIGNALED (w) || WIFEXITED (w)) |
4216 | && XINT (p->infd) >= 0) | |
4217 | clear_desc_flag = 1; | |
4218 | ||
4219 | /* We use clear_desc_flag to avoid a compiler bug in Microsoft C. */ | |
4220 | if (clear_desc_flag) | |
4221 | { | |
4222 | FD_CLR (XINT (p->infd), &input_wait_mask); | |
4223 | FD_CLR (XINT (p->infd), &non_keyboard_wait_mask); | |
4224 | } | |
6be429b1 JB |
4225 | |
4226 | /* Tell wait_reading_process_input that it needs to wake up and | |
4227 | look around. */ | |
4228 | if (input_available_clear_time) | |
4229 | EMACS_SET_SECS_USECS (*input_available_clear_time, 0, 0); | |
d0d6b7c5 JB |
4230 | } |
4231 | ||
4232 | /* There was no asynchronous process found for that id. Check | |
4233 | if we have a synchronous process. */ | |
4234 | else | |
4235 | { | |
4236 | synch_process_alive = 0; | |
4237 | ||
4238 | /* Report the status of the synchronous process. */ | |
4239 | if (WIFEXITED (w)) | |
4240 | synch_process_retcode = WRETCODE (w); | |
4241 | else if (WIFSIGNALED (w)) | |
b97ad9ea RS |
4242 | { |
4243 | int code = WTERMSIG (w); | |
4244 | char *signame = 0; | |
4245 | ||
4246 | if (code < NSIG) | |
4247 | { | |
b0310da4 | 4248 | #ifndef VMS |
ed0cae05 RS |
4249 | /* Suppress warning if the table has const char *. */ |
4250 | signame = (char *) sys_siglist[code]; | |
b0310da4 | 4251 | #else |
b97ad9ea | 4252 | signame = sys_errlist[code]; |
b0310da4 | 4253 | #endif |
b97ad9ea RS |
4254 | } |
4255 | if (signame == 0) | |
4256 | signame = "unknown"; | |
4257 | ||
4258 | synch_process_death = signame; | |
4259 | } | |
6be429b1 JB |
4260 | |
4261 | /* Tell wait_reading_process_input that it needs to wake up and | |
4262 | look around. */ | |
4263 | if (input_available_clear_time) | |
4264 | EMACS_SET_SECS_USECS (*input_available_clear_time, 0, 0); | |
d0d6b7c5 JB |
4265 | } |
4266 | ||
4267 | /* On some systems, we must return right away. | |
4268 | If any more processes want to signal us, we will | |
4269 | get another signal. | |
4270 | Otherwise (on systems that have WNOHANG), loop around | |
4271 | to use up all the processes that have something to tell us. */ | |
e98d950b | 4272 | #if defined (USG) && ! (defined (HPUX) && defined (WNOHANG)) || defined (WINDOWSNT) |
3c0ee47b | 4273 | #if defined (USG) && ! defined (POSIX_SIGNALS) |
d0d6b7c5 JB |
4274 | signal (signo, sigchld_handler); |
4275 | #endif | |
4276 | errno = old_errno; | |
4277 | return; | |
4278 | #endif /* USG, but not HPUX with WNOHANG */ | |
4279 | } | |
4280 | } | |
4281 | \f | |
4282 | ||
4283 | static Lisp_Object | |
4284 | exec_sentinel_unwind (data) | |
4285 | Lisp_Object data; | |
4286 | { | |
70949dac | 4287 | XPROCESS (XCAR (data))->sentinel = XCDR (data); |
d0d6b7c5 JB |
4288 | return Qnil; |
4289 | } | |
4290 | ||
3b9a3dfa RS |
4291 | static Lisp_Object |
4292 | exec_sentinel_error_handler (error) | |
4293 | Lisp_Object error; | |
4294 | { | |
4295 | cmd_error_internal (error, "error in process sentinel: "); | |
4296 | Vinhibit_quit = Qt; | |
4297 | update_echo_area (); | |
833ba342 | 4298 | Fsleep_for (make_number (2), Qnil); |
3b9a3dfa RS |
4299 | } |
4300 | ||
d0d6b7c5 JB |
4301 | static void |
4302 | exec_sentinel (proc, reason) | |
4303 | Lisp_Object proc, reason; | |
4304 | { | |
dfc21838 | 4305 | Lisp_Object sentinel, obuffer, odeactivate, okeymap; |
d0d6b7c5 JB |
4306 | register struct Lisp_Process *p = XPROCESS (proc); |
4307 | int count = specpdl_ptr - specpdl; | |
4da2f5be | 4308 | int outer_running_asynch_code = running_asynch_code; |
bbce7d72 | 4309 | int waiting = waiting_for_user_input_p; |
d0d6b7c5 | 4310 | |
dfc21838 RS |
4311 | /* No need to gcpro these, because all we do with them later |
4312 | is test them for EQness, and none of them should be a string. */ | |
8fb3cf64 | 4313 | odeactivate = Vdeactivate_mark; |
dfc21838 RS |
4314 | XSETBUFFER (obuffer, current_buffer); |
4315 | okeymap = current_buffer->keymap; | |
4316 | ||
d0d6b7c5 JB |
4317 | sentinel = p->sentinel; |
4318 | if (NILP (sentinel)) | |
4319 | return; | |
4320 | ||
4321 | /* Zilch the sentinel while it's running, to avoid recursive invocations; | |
4322 | assure that it gets restored no matter how the sentinel exits. */ | |
4323 | p->sentinel = Qnil; | |
4324 | record_unwind_protect (exec_sentinel_unwind, Fcons (proc, sentinel)); | |
4325 | /* Inhibit quit so that random quits don't screw up a running filter. */ | |
4326 | specbind (Qinhibit_quit, Qt); | |
6545aada | 4327 | specbind (Qlast_nonmenu_event, Qt); |
3b9a3dfa | 4328 | |
4da2f5be RS |
4329 | /* In case we get recursively called, |
4330 | and we already saved the match data nonrecursively, | |
4331 | save the same match data in safely recursive fashion. */ | |
4332 | if (outer_running_asynch_code) | |
4333 | { | |
4334 | Lisp_Object tem; | |
dd130227 | 4335 | tem = Fmatch_data (Qnil, Qnil); |
4da2f5be | 4336 | restore_match_data (); |
8f1ecd05 RS |
4337 | record_unwind_protect (Fset_match_data, Fmatch_data (Qnil, Qnil)); |
4338 | Fset_match_data (tem); | |
4da2f5be RS |
4339 | } |
4340 | ||
4341 | /* For speed, if a search happens within this code, | |
4342 | save the match data in a special nonrecursive fashion. */ | |
7074fde6 | 4343 | running_asynch_code = 1; |
4da2f5be | 4344 | |
3b9a3dfa RS |
4345 | internal_condition_case_1 (read_process_output_call, |
4346 | Fcons (sentinel, | |
4347 | Fcons (proc, Fcons (reason, Qnil))), | |
4348 | !NILP (Vdebug_on_error) ? Qnil : Qerror, | |
4349 | exec_sentinel_error_handler); | |
4da2f5be RS |
4350 | |
4351 | /* If we saved the match data nonrecursively, restore it now. */ | |
7074fde6 | 4352 | restore_match_data (); |
4da2f5be | 4353 | running_asynch_code = outer_running_asynch_code; |
8fb3cf64 KH |
4354 | |
4355 | Vdeactivate_mark = odeactivate; | |
bbce7d72 RS |
4356 | |
4357 | /* Restore waiting_for_user_input_p as it was | |
4358 | when we were called, in case the filter clobbered it. */ | |
4359 | waiting_for_user_input_p = waiting; | |
4360 | ||
7973cfa8 | 4361 | #if 0 |
dfc21838 RS |
4362 | if (! EQ (Fcurrent_buffer (), obuffer) |
4363 | || ! EQ (current_buffer->keymap, okeymap)) | |
7973cfa8 | 4364 | #endif |
927e08be RS |
4365 | /* But do it only if the caller is actually going to read events. |
4366 | Otherwise there's no need to make him wake up, and it could | |
4367 | cause trouble (for example it would make Fsit_for return). */ | |
4368 | if (waiting_for_user_input_p == -1) | |
4369 | record_asynch_buffer_change (); | |
8fb3cf64 | 4370 | |
2ea6d561 | 4371 | unbind_to (count, Qnil); |
d0d6b7c5 JB |
4372 | } |
4373 | ||
4374 | /* Report all recent events of a change in process status | |
4375 | (either run the sentinel or output a message). | |
4376 | This is done while Emacs is waiting for keyboard input. */ | |
4377 | ||
6b53bb85 | 4378 | void |
d0d6b7c5 JB |
4379 | status_notify () |
4380 | { | |
4381 | register Lisp_Object proc, buffer; | |
2e4149a8 | 4382 | Lisp_Object tail, msg; |
d0d6b7c5 JB |
4383 | struct gcpro gcpro1, gcpro2; |
4384 | ||
2e4149a8 KH |
4385 | tail = Qnil; |
4386 | msg = Qnil; | |
d0d6b7c5 JB |
4387 | /* We need to gcpro tail; if read_process_output calls a filter |
4388 | which deletes a process and removes the cons to which tail points | |
4389 | from Vprocess_alist, and then causes a GC, tail is an unprotected | |
4390 | reference. */ | |
4391 | GCPRO2 (tail, msg); | |
4392 | ||
30623085 RS |
4393 | /* Set this now, so that if new processes are created by sentinels |
4394 | that we run, we get called again to handle their status changes. */ | |
4395 | update_tick = process_tick; | |
4396 | ||
4397 | for (tail = Vprocess_alist; !NILP (tail); tail = Fcdr (tail)) | |
d0d6b7c5 | 4398 | { |
30623085 RS |
4399 | Lisp_Object symbol; |
4400 | register struct Lisp_Process *p; | |
4401 | ||
4402 | proc = Fcdr (Fcar (tail)); | |
4403 | p = XPROCESS (proc); | |
4404 | ||
4405 | if (XINT (p->tick) != XINT (p->update_tick)) | |
d0d6b7c5 | 4406 | { |
30623085 | 4407 | XSETINT (p->update_tick, XINT (p->tick)); |
d0d6b7c5 | 4408 | |
30623085 | 4409 | /* If process is still active, read any output that remains. */ |
4da2f5be RS |
4410 | while (! EQ (p->filter, Qt) |
4411 | && XINT (p->infd) >= 0 | |
4412 | && read_process_output (proc, XINT (p->infd)) > 0); | |
d0d6b7c5 | 4413 | |
30623085 | 4414 | buffer = p->buffer; |
d0d6b7c5 | 4415 | |
30623085 RS |
4416 | /* Get the text to use for the message. */ |
4417 | if (!NILP (p->raw_status_low)) | |
4418 | update_status (p); | |
4419 | msg = status_message (p->status); | |
d0d6b7c5 | 4420 | |
30623085 RS |
4421 | /* If process is terminated, deactivate it or delete it. */ |
4422 | symbol = p->status; | |
4423 | if (CONSP (p->status)) | |
70949dac | 4424 | symbol = XCAR (p->status); |
d0d6b7c5 | 4425 | |
30623085 RS |
4426 | if (EQ (symbol, Qsignal) || EQ (symbol, Qexit) |
4427 | || EQ (symbol, Qclosed)) | |
4428 | { | |
4429 | if (delete_exited_processes) | |
4430 | remove_process (proc); | |
4431 | else | |
4432 | deactivate_process (proc); | |
4433 | } | |
d0d6b7c5 | 4434 | |
0ad61fe7 RS |
4435 | /* The actions above may have further incremented p->tick. |
4436 | So set p->update_tick again | |
4437 | so that an error in the sentinel will not cause | |
4438 | this code to be run again. */ | |
4439 | XSETINT (p->update_tick, XINT (p->tick)); | |
30623085 RS |
4440 | /* Now output the message suitably. */ |
4441 | if (!NILP (p->sentinel)) | |
4442 | exec_sentinel (proc, msg); | |
4443 | /* Don't bother with a message in the buffer | |
4444 | when a process becomes runnable. */ | |
4445 | else if (!EQ (symbol, Qrun) && !NILP (buffer)) | |
4446 | { | |
4447 | Lisp_Object ro, tem; | |
4448 | struct buffer *old = current_buffer; | |
d8a2934e RS |
4449 | int opoint, opoint_byte; |
4450 | int before, before_byte; | |
2e4149a8 | 4451 | |
30623085 | 4452 | ro = XBUFFER (buffer)->read_only; |
d0d6b7c5 | 4453 | |
30623085 RS |
4454 | /* Avoid error if buffer is deleted |
4455 | (probably that's why the process is dead, too) */ | |
4456 | if (NILP (XBUFFER (buffer)->name)) | |
4457 | continue; | |
4458 | Fset_buffer (buffer); | |
12ca5cdf | 4459 | |
6ec8bbd2 | 4460 | opoint = PT; |
d8a2934e | 4461 | opoint_byte = PT_BYTE; |
30623085 RS |
4462 | /* Insert new output into buffer |
4463 | at the current end-of-output marker, | |
4464 | thus preserving logical ordering of input and output. */ | |
4465 | if (XMARKER (p->mark)->buffer) | |
d8a2934e | 4466 | Fgoto_char (p->mark); |
30623085 | 4467 | else |
d8a2934e | 4468 | SET_PT_BOTH (ZV, ZV_BYTE); |
12ca5cdf RS |
4469 | |
4470 | before = PT; | |
d8a2934e | 4471 | before_byte = PT_BYTE; |
30623085 RS |
4472 | |
4473 | tem = current_buffer->read_only; | |
4474 | current_buffer->read_only = Qnil; | |
4475 | insert_string ("\nProcess "); | |
4476 | Finsert (1, &p->name); | |
4477 | insert_string (" "); | |
4478 | Finsert (1, &msg); | |
4479 | current_buffer->read_only = tem; | |
d8a2934e | 4480 | set_marker_both (p->mark, p->buffer, PT, PT_BYTE); |
30623085 | 4481 | |
12ca5cdf | 4482 | if (opoint >= before) |
d8a2934e RS |
4483 | SET_PT_BOTH (opoint + (PT - before), |
4484 | opoint_byte + (PT_BYTE - before_byte)); | |
12ca5cdf | 4485 | else |
d8a2934e | 4486 | SET_PT_BOTH (opoint, opoint_byte); |
12ca5cdf | 4487 | |
30623085 | 4488 | set_buffer_internal (old); |
d0d6b7c5 | 4489 | } |
30623085 RS |
4490 | } |
4491 | } /* end for */ | |
d0d6b7c5 JB |
4492 | |
4493 | update_mode_lines++; /* in case buffers use %s in mode-line-format */ | |
4494 | redisplay_preserve_echo_area (); | |
4495 | ||
d0d6b7c5 JB |
4496 | UNGCPRO; |
4497 | } | |
0fa1789e KH |
4498 | |
4499 | \f | |
4500 | DEFUN ("set-process-coding-system", Fset_process_coding_system, | |
4501 | Sset_process_coding_system, 1, 3, 0, | |
7744ca33 KH |
4502 | "Set coding systems of PROCESS to DECODING and ENCODING.\n\ |
4503 | DECODING will be used to decode subprocess output and ENCODING to\n\ | |
4504 | encode subprocess input.") | |
0fa1789e KH |
4505 | (proc, decoding, encoding) |
4506 | register Lisp_Object proc, decoding, encoding; | |
4507 | { | |
4508 | register struct Lisp_Process *p; | |
4509 | ||
4510 | CHECK_PROCESS (proc, 0); | |
4511 | p = XPROCESS (proc); | |
4512 | if (XINT (p->infd) < 0) | |
4513 | error ("Input file descriptor of %s closed", XSTRING (p->name)->data); | |
4514 | if (XINT (p->outfd) < 0) | |
4515 | error ("Output file descriptor of %s closed", XSTRING (p->name)->data); | |
4516 | ||
4517 | p->decode_coding_system = Fcheck_coding_system (decoding); | |
4518 | p->encode_coding_system = Fcheck_coding_system (encoding); | |
4519 | setup_coding_system (decoding, | |
c7580538 | 4520 | proc_decode_coding_system[XINT (p->infd)]); |
0fa1789e | 4521 | setup_coding_system (encoding, |
c7580538 | 4522 | proc_encode_coding_system[XINT (p->outfd)]); |
0fa1789e KH |
4523 | |
4524 | return Qnil; | |
4525 | } | |
4526 | ||
4527 | DEFUN ("process-coding-system", | |
4528 | Fprocess_coding_system, Sprocess_coding_system, 1, 1, 0, | |
a95c35f6 | 4529 | "Return a cons of coding systems for decoding and encoding of PROCESS.") |
0fa1789e KH |
4530 | (proc) |
4531 | register Lisp_Object proc; | |
4532 | { | |
4533 | CHECK_PROCESS (proc, 0); | |
4534 | return Fcons (XPROCESS (proc)->decode_coding_system, | |
4535 | XPROCESS (proc)->encode_coding_system); | |
4536 | } | |
d0d6b7c5 | 4537 | \f |
a69281ff RS |
4538 | /* The first time this is called, assume keyboard input comes from DESC |
4539 | instead of from where we used to expect it. | |
4540 | Subsequent calls mean assume input keyboard can come from DESC | |
4541 | in addition to other places. */ | |
4542 | ||
4543 | static int add_keyboard_wait_descriptor_called_flag; | |
4544 | ||
4545 | void | |
4546 | add_keyboard_wait_descriptor (desc) | |
4547 | int desc; | |
4548 | { | |
4549 | if (! add_keyboard_wait_descriptor_called_flag) | |
4550 | FD_CLR (0, &input_wait_mask); | |
4551 | add_keyboard_wait_descriptor_called_flag = 1; | |
4552 | FD_SET (desc, &input_wait_mask); | |
b5dc1c83 | 4553 | FD_SET (desc, &non_process_wait_mask); |
a69281ff RS |
4554 | if (desc > max_keyboard_desc) |
4555 | max_keyboard_desc = desc; | |
4556 | } | |
4557 | ||
4558 | /* From now on, do not expect DESC to give keyboard input. */ | |
4559 | ||
4560 | void | |
4561 | delete_keyboard_wait_descriptor (desc) | |
4562 | int desc; | |
4563 | { | |
4564 | int fd; | |
4565 | int lim = max_keyboard_desc; | |
4566 | ||
4567 | FD_CLR (desc, &input_wait_mask); | |
b5dc1c83 | 4568 | FD_CLR (desc, &non_process_wait_mask); |
a69281ff RS |
4569 | |
4570 | if (desc == max_keyboard_desc) | |
4571 | for (fd = 0; fd < lim; fd++) | |
4572 | if (FD_ISSET (fd, &input_wait_mask) | |
4573 | && !FD_ISSET (fd, &non_keyboard_wait_mask)) | |
4574 | max_keyboard_desc = fd; | |
4575 | } | |
4576 | ||
4577 | /* Return nonzero if *MASK has a bit set | |
4578 | that corresponds to one of the keyboard input descriptors. */ | |
4579 | ||
4580 | int | |
4581 | keyboard_bit_set (mask) | |
4582 | SELECT_TYPE *mask; | |
4583 | { | |
4584 | int fd; | |
4585 | ||
ee8e09af | 4586 | for (fd = 0; fd <= max_keyboard_desc; fd++) |
a69281ff RS |
4587 | if (FD_ISSET (fd, mask) && FD_ISSET (fd, &input_wait_mask) |
4588 | && !FD_ISSET (fd, &non_keyboard_wait_mask)) | |
4589 | return 1; | |
4590 | ||
4591 | return 0; | |
4592 | } | |
4593 | \f | |
dfcf069d | 4594 | void |
d0d6b7c5 JB |
4595 | init_process () |
4596 | { | |
4597 | register int i; | |
4598 | ||
4599 | #ifdef SIGCHLD | |
4600 | #ifndef CANNOT_DUMP | |
4601 | if (! noninteractive || initialized) | |
4602 | #endif | |
4603 | signal (SIGCHLD, sigchld_handler); | |
4604 | #endif | |
4605 | ||
4606 | FD_ZERO (&input_wait_mask); | |
a69281ff | 4607 | FD_ZERO (&non_keyboard_wait_mask); |
b5dc1c83 | 4608 | FD_ZERO (&non_process_wait_mask); |
7d0e672e | 4609 | max_process_desc = 0; |
dd2281ae | 4610 | |
a69281ff | 4611 | FD_SET (0, &input_wait_mask); |
dd2281ae | 4612 | |
d0d6b7c5 JB |
4613 | Vprocess_alist = Qnil; |
4614 | for (i = 0; i < MAXDESC; i++) | |
4615 | { | |
4616 | chan_process[i] = Qnil; | |
4617 | proc_buffered_char[i] = -1; | |
4618 | } | |
c7580538 KH |
4619 | bzero (proc_decode_coding_system, sizeof proc_decode_coding_system); |
4620 | bzero (proc_encode_coding_system, sizeof proc_encode_coding_system); | |
77c070f3 KH |
4621 | |
4622 | Vdefault_process_coding_system | |
4623 | = (NILP (buffer_defaults.enable_multibyte_characters) | |
4624 | ? Fcons (Qraw_text, Qnil) | |
4625 | : Fcons (Qemacs_mule, Qnil)); | |
d0d6b7c5 | 4626 | } |
312c9964 | 4627 | |
dfcf069d | 4628 | void |
d0d6b7c5 JB |
4629 | syms_of_process () |
4630 | { | |
d0d6b7c5 JB |
4631 | Qprocessp = intern ("processp"); |
4632 | staticpro (&Qprocessp); | |
4633 | Qrun = intern ("run"); | |
4634 | staticpro (&Qrun); | |
4635 | Qstop = intern ("stop"); | |
4636 | staticpro (&Qstop); | |
4637 | Qsignal = intern ("signal"); | |
4638 | staticpro (&Qsignal); | |
4639 | ||
4640 | /* Qexit is already staticpro'd by syms_of_eval; don't staticpro it | |
4641 | here again. | |
4642 | ||
4643 | Qexit = intern ("exit"); | |
4644 | staticpro (&Qexit); */ | |
4645 | ||
4646 | Qopen = intern ("open"); | |
4647 | staticpro (&Qopen); | |
4648 | Qclosed = intern ("closed"); | |
4649 | staticpro (&Qclosed); | |
4650 | ||
6545aada RS |
4651 | Qlast_nonmenu_event = intern ("last-nonmenu-event"); |
4652 | staticpro (&Qlast_nonmenu_event); | |
4653 | ||
d0d6b7c5 JB |
4654 | staticpro (&Vprocess_alist); |
4655 | ||
4656 | DEFVAR_BOOL ("delete-exited-processes", &delete_exited_processes, | |
4657 | "*Non-nil means delete processes immediately when they exit.\n\ | |
4658 | nil means don't delete them until `list-processes' is run."); | |
4659 | ||
4660 | delete_exited_processes = 1; | |
4661 | ||
4662 | DEFVAR_LISP ("process-connection-type", &Vprocess_connection_type, | |
4663 | "Control type of device used to communicate with subprocesses.\n\ | |
e333e864 RS |
4664 | Values are nil to use a pipe, or t or `pty' to use a pty.\n\ |
4665 | The value has no effect if the system has no ptys or if all ptys are busy:\n\ | |
4666 | then a pipe is used in any case.\n\ | |
4667 | The value takes effect when `start-process' is called."); | |
d0d6b7c5 JB |
4668 | Vprocess_connection_type = Qt; |
4669 | ||
4670 | defsubr (&Sprocessp); | |
4671 | defsubr (&Sget_process); | |
4672 | defsubr (&Sget_buffer_process); | |
4673 | defsubr (&Sdelete_process); | |
4674 | defsubr (&Sprocess_status); | |
4675 | defsubr (&Sprocess_exit_status); | |
4676 | defsubr (&Sprocess_id); | |
4677 | defsubr (&Sprocess_name); | |
3b9a3dfa | 4678 | defsubr (&Sprocess_tty_name); |
d0d6b7c5 JB |
4679 | defsubr (&Sprocess_command); |
4680 | defsubr (&Sset_process_buffer); | |
4681 | defsubr (&Sprocess_buffer); | |
4682 | defsubr (&Sprocess_mark); | |
4683 | defsubr (&Sset_process_filter); | |
4684 | defsubr (&Sprocess_filter); | |
4685 | defsubr (&Sset_process_sentinel); | |
4686 | defsubr (&Sprocess_sentinel); | |
de282a05 | 4687 | defsubr (&Sset_process_window_size); |
52a1b894 EZ |
4688 | defsubr (&Sset_process_inherit_coding_system_flag); |
4689 | defsubr (&Sprocess_inherit_coding_system_flag); | |
d0d6b7c5 | 4690 | defsubr (&Sprocess_kill_without_query); |
de282a05 | 4691 | defsubr (&Sprocess_contact); |
d0d6b7c5 JB |
4692 | defsubr (&Slist_processes); |
4693 | defsubr (&Sprocess_list); | |
4694 | defsubr (&Sstart_process); | |
4695 | #ifdef HAVE_SOCKETS | |
4696 | defsubr (&Sopen_network_stream); | |
4697 | #endif /* HAVE_SOCKETS */ | |
4698 | defsubr (&Saccept_process_output); | |
4699 | defsubr (&Sprocess_send_region); | |
4700 | defsubr (&Sprocess_send_string); | |
4701 | defsubr (&Sinterrupt_process); | |
4702 | defsubr (&Skill_process); | |
4703 | defsubr (&Squit_process); | |
4704 | defsubr (&Sstop_process); | |
4705 | defsubr (&Scontinue_process); | |
b81ea5ef | 4706 | defsubr (&Sprocess_running_child_p); |
d0d6b7c5 JB |
4707 | defsubr (&Sprocess_send_eof); |
4708 | defsubr (&Ssignal_process); | |
4709 | defsubr (&Swaiting_for_user_input_p); | |
4710 | /* defsubr (&Sprocess_connection); */ | |
0fa1789e KH |
4711 | defsubr (&Sset_process_coding_system); |
4712 | defsubr (&Sprocess_coding_system); | |
d0d6b7c5 JB |
4713 | } |
4714 | ||
6720a7fb JB |
4715 | \f |
4716 | #else /* not subprocesses */ | |
4717 | ||
4718 | #include <sys/types.h> | |
4719 | #include <errno.h> | |
4720 | ||
4721 | #include "lisp.h" | |
4722 | #include "systime.h" | |
52a1b894 EZ |
4723 | #include "charset.h" |
4724 | #include "coding.h" | |
6720a7fb | 4725 | #include "termopts.h" |
81afb6d1 | 4726 | #include "sysselect.h" |
6720a7fb | 4727 | |
ff11dfa1 | 4728 | extern int frame_garbaged; |
6720a7fb | 4729 | |
f694e5d2 KH |
4730 | extern EMACS_TIME timer_check (); |
4731 | extern int timers_run; | |
6720a7fb JB |
4732 | |
4733 | /* As described above, except assuming that there are no subprocesses: | |
4734 | ||
4735 | Wait for timeout to elapse and/or keyboard input to be available. | |
4736 | ||
4737 | time_limit is: | |
4738 | timeout in seconds, or | |
4739 | zero for no limit, or | |
4740 | -1 means gobble data immediately available but don't wait for any. | |
4741 | ||
f76475ad | 4742 | read_kbd is a Lisp_Object: |
6720a7fb JB |
4743 | 0 to ignore keyboard input, or |
4744 | 1 to return when input is available, or | |
4745 | -1 means caller will actually read the input, so don't throw to | |
4746 | the quit handler. | |
0a65b032 RS |
4747 | a cons cell, meaning wait until its car is non-nil |
4748 | (and gobble terminal input into the buffer if any arrives), or | |
6720a7fb JB |
4749 | We know that read_kbd will never be a Lisp_Process, since |
4750 | `subprocesses' isn't defined. | |
4751 | ||
4752 | do_display != 0 means redisplay should be done to show subprocess | |
5164ee8e | 4753 | output that arrives. |
6720a7fb | 4754 | |
eb8c3be9 | 4755 | Return true iff we received input from any process. */ |
6720a7fb JB |
4756 | |
4757 | int | |
4758 | wait_reading_process_input (time_limit, microsecs, read_kbd, do_display) | |
f76475ad JB |
4759 | int time_limit, microsecs; |
4760 | Lisp_Object read_kbd; | |
4761 | int do_display; | |
6720a7fb | 4762 | { |
52fd88d3 | 4763 | register int nfds; |
f694e5d2 | 4764 | EMACS_TIME end_time, timeout; |
8db121c4 | 4765 | SELECT_TYPE waitchannels; |
f694e5d2 | 4766 | int xerrno; |
0a65b032 RS |
4767 | Lisp_Object *wait_for_cell = 0; |
4768 | ||
4769 | /* If waiting for non-nil in a cell, record where. */ | |
4770 | if (CONSP (read_kbd)) | |
4771 | { | |
70949dac | 4772 | wait_for_cell = &XCAR (read_kbd); |
0a65b032 RS |
4773 | XSETFASTINT (read_kbd, 0); |
4774 | } | |
6720a7fb JB |
4775 | |
4776 | /* What does time_limit really mean? */ | |
4777 | if (time_limit || microsecs) | |
4778 | { | |
6720a7fb | 4779 | EMACS_GET_TIME (end_time); |
52fd88d3 | 4780 | EMACS_SET_SECS_USECS (timeout, time_limit, microsecs); |
6720a7fb JB |
4781 | EMACS_ADD_TIME (end_time, end_time, timeout); |
4782 | } | |
6720a7fb JB |
4783 | |
4784 | /* Turn off periodic alarms (in case they are in use) | |
4785 | because the select emulator uses alarms. */ | |
4786 | stop_polling (); | |
4787 | ||
52fd88d3 | 4788 | while (1) |
6720a7fb | 4789 | { |
bae8d137 | 4790 | int timeout_reduced_for_timers = 0; |
6720a7fb | 4791 | |
6720a7fb JB |
4792 | /* If calling from keyboard input, do not quit |
4793 | since we want to return C-g as an input character. | |
4794 | Otherwise, do pending quit if requested. */ | |
f76475ad | 4795 | if (XINT (read_kbd) >= 0) |
6720a7fb JB |
4796 | QUIT; |
4797 | ||
0a65b032 RS |
4798 | /* Exit now if the cell we're waiting for became non-nil. */ |
4799 | if (wait_for_cell && ! NILP (*wait_for_cell)) | |
4800 | break; | |
4801 | ||
bae8d137 RS |
4802 | /* Compute time from now till when time limit is up */ |
4803 | /* Exit if already run out */ | |
52fd88d3 EZ |
4804 | if (time_limit == -1) |
4805 | { | |
4806 | /* -1 specified for timeout means | |
4807 | gobble output available now | |
4808 | but don't wait at all. */ | |
4809 | ||
4810 | EMACS_SET_SECS_USECS (timeout, 0, 0); | |
4811 | } | |
4812 | else if (time_limit || microsecs) | |
6720a7fb | 4813 | { |
f694e5d2 KH |
4814 | EMACS_GET_TIME (timeout); |
4815 | EMACS_SUB_TIME (timeout, end_time, timeout); | |
4816 | if (EMACS_TIME_NEG_P (timeout)) | |
6720a7fb JB |
4817 | break; |
4818 | } | |
52fd88d3 EZ |
4819 | else |
4820 | { | |
4821 | EMACS_SET_SECS_USECS (timeout, 100000, 0); | |
4822 | } | |
6720a7fb | 4823 | |
bae8d137 RS |
4824 | /* If our caller will not immediately handle keyboard events, |
4825 | run timer events directly. | |
4826 | (Callers that will immediately read keyboard events | |
4827 | call timer_delay on their own.) */ | |
f854a00b | 4828 | if (! wait_for_cell) |
bae8d137 RS |
4829 | { |
4830 | EMACS_TIME timer_delay; | |
0a65b032 RS |
4831 | int old_timers_run; |
4832 | ||
4833 | retry: | |
4834 | old_timers_run = timers_run; | |
bae8d137 RS |
4835 | timer_delay = timer_check (1); |
4836 | if (timers_run != old_timers_run && do_display) | |
0a65b032 RS |
4837 | { |
4838 | redisplay_preserve_echo_area (); | |
4839 | /* We must retry, since a timer may have requeued itself | |
4840 | and that could alter the time delay. */ | |
4841 | goto retry; | |
4842 | } | |
4843 | ||
52fd88d3 EZ |
4844 | /* If there is unread keyboard input, also return. */ |
4845 | if (XINT (read_kbd) != 0 | |
4846 | && requeued_events_pending_p ()) | |
4847 | break; | |
4848 | ||
f694e5d2 | 4849 | if (! EMACS_TIME_NEG_P (timer_delay) && time_limit != -1) |
bae8d137 RS |
4850 | { |
4851 | EMACS_TIME difference; | |
f694e5d2 | 4852 | EMACS_SUB_TIME (difference, timer_delay, timeout); |
bae8d137 RS |
4853 | if (EMACS_TIME_NEG_P (difference)) |
4854 | { | |
f694e5d2 | 4855 | timeout = timer_delay; |
bae8d137 RS |
4856 | timeout_reduced_for_timers = 1; |
4857 | } | |
4858 | } | |
4859 | } | |
4860 | ||
6720a7fb JB |
4861 | /* Cause C-g and alarm signals to take immediate action, |
4862 | and cause input available signals to zero out timeout. */ | |
f76475ad | 4863 | if (XINT (read_kbd) < 0) |
6720a7fb JB |
4864 | set_waiting_for_input (&timeout); |
4865 | ||
0a65b032 RS |
4866 | /* Wait till there is something to do. */ |
4867 | ||
4868 | if (! XINT (read_kbd) && wait_for_cell == 0) | |
4869 | FD_ZERO (&waitchannels); | |
4870 | else | |
4871 | FD_SET (0, &waitchannels); | |
4872 | ||
ff11dfa1 | 4873 | /* If a frame has been newly mapped and needs updating, |
6720a7fb | 4874 | reprocess its display stuff. */ |
5164ee8e | 4875 | if (frame_garbaged && do_display) |
0a65b032 RS |
4876 | { |
4877 | clear_waiting_for_input (); | |
4878 | redisplay_preserve_echo_area (); | |
4879 | if (XINT (read_kbd) < 0) | |
4880 | set_waiting_for_input (&timeout); | |
4881 | } | |
6720a7fb | 4882 | |
1861b214 RS |
4883 | if (XINT (read_kbd) && detect_input_pending ()) |
4884 | { | |
4885 | nfds = 0; | |
4886 | FD_ZERO (&waitchannels); | |
4887 | } | |
4888 | else | |
4889 | nfds = select (1, &waitchannels, (SELECT_TYPE *)0, (SELECT_TYPE *)0, | |
4890 | &timeout); | |
f694e5d2 KH |
4891 | |
4892 | xerrno = errno; | |
6720a7fb JB |
4893 | |
4894 | /* Make C-g and alarm signals set flags again */ | |
4895 | clear_waiting_for_input (); | |
4896 | ||
4897 | /* If we woke up due to SIGWINCH, actually change size now. */ | |
2b653806 | 4898 | do_pending_window_change (0); |
6720a7fb | 4899 | |
f694e5d2 KH |
4900 | if (time_limit && nfds == 0 && ! timeout_reduced_for_timers) |
4901 | /* We waited the full specified time, so return now. */ | |
4902 | break; | |
4903 | ||
6720a7fb JB |
4904 | if (nfds == -1) |
4905 | { | |
4906 | /* If the system call was interrupted, then go around the | |
4907 | loop again. */ | |
f694e5d2 | 4908 | if (xerrno == EINTR) |
8db121c4 | 4909 | FD_ZERO (&waitchannels); |
f694e5d2 KH |
4910 | else |
4911 | error ("select error: %s", strerror (xerrno)); | |
6720a7fb JB |
4912 | } |
4913 | #ifdef sun | |
4914 | else if (nfds > 0 && (waitchannels & 1) && interrupt_input) | |
4915 | /* System sometimes fails to deliver SIGIO. */ | |
4916 | kill (getpid (), SIGIO); | |
4917 | #endif | |
7324d660 | 4918 | #ifdef SIGIO |
f76475ad | 4919 | if (XINT (read_kbd) && interrupt_input && (waitchannels & 1)) |
e643c5be | 4920 | kill (getpid (), SIGIO); |
7324d660 | 4921 | #endif |
6720a7fb | 4922 | |
f694e5d2 KH |
4923 | /* Check for keyboard input */ |
4924 | ||
f854a00b | 4925 | if ((XINT (read_kbd) != 0) |
f694e5d2 KH |
4926 | && detect_input_pending_run_timers (do_display)) |
4927 | { | |
4928 | swallow_events (do_display); | |
4929 | if (detect_input_pending_run_timers (do_display)) | |
4930 | break; | |
4931 | } | |
0a65b032 | 4932 | |
52fd88d3 EZ |
4933 | /* If there is unread keyboard input, also return. */ |
4934 | if (XINT (read_kbd) != 0 | |
4935 | && requeued_events_pending_p ()) | |
4936 | break; | |
4937 | ||
f854a00b RS |
4938 | /* If wait_for_cell. check for keyboard input |
4939 | but don't run any timers. | |
4940 | ??? (It seems wrong to me to check for keyboard | |
4941 | input at all when wait_for_cell, but the code | |
4942 | has been this way since July 1994. | |
4943 | Try changing this after version 19.31.) */ | |
4944 | if (wait_for_cell | |
4945 | && detect_input_pending ()) | |
4946 | { | |
4947 | swallow_events (do_display); | |
4948 | if (detect_input_pending ()) | |
4949 | break; | |
4950 | } | |
4951 | ||
0a65b032 RS |
4952 | /* Exit now if the cell we're waiting for became non-nil. */ |
4953 | if (wait_for_cell && ! NILP (*wait_for_cell)) | |
4954 | break; | |
6720a7fb JB |
4955 | } |
4956 | ||
a87b802f JB |
4957 | start_polling (); |
4958 | ||
6720a7fb JB |
4959 | return 0; |
4960 | } | |
4961 | ||
4962 | ||
4963 | DEFUN ("get-buffer-process", Fget_buffer_process, Sget_buffer_process, 1, 1, 0, | |
51ab806a | 4964 | /* Don't confuse make-docfile by having two doc strings for this function. |
312c9964 RS |
4965 | make-docfile does not pay attention to #if, for good reason! */ |
4966 | 0) | |
6720a7fb JB |
4967 | (name) |
4968 | register Lisp_Object name; | |
4969 | { | |
4970 | return Qnil; | |
4971 | } | |
4972 | ||
52a1b894 EZ |
4973 | DEFUN ("process-inherit-coding-system-flag", |
4974 | Fprocess_inherit_coding_system_flag, Sprocess_inherit_coding_system_flag, | |
4975 | 1, 1, 0, | |
4976 | /* Don't confuse make-docfile by having two doc strings for this function. | |
4977 | make-docfile does not pay attention to #if, for good reason! */ | |
4978 | 0) | |
4979 | (process) | |
4980 | register Lisp_Object process; | |
4981 | { | |
4982 | /* Ignore the argument and return the value of | |
4983 | inherit-process-coding-system. */ | |
4984 | return inherit_process_coding_system ? Qt : Qnil; | |
4985 | } | |
4986 | ||
6720a7fb JB |
4987 | /* Kill all processes associated with `buffer'. |
4988 | If `buffer' is nil, kill all processes. | |
4989 | Since we have no subprocesses, this does nothing. */ | |
4990 | ||
d9bb0c32 | 4991 | void |
6720a7fb JB |
4992 | kill_buffer_processes (buffer) |
4993 | Lisp_Object buffer; | |
4994 | { | |
4995 | } | |
4996 | ||
02b9b4fd | 4997 | void |
6720a7fb JB |
4998 | init_process () |
4999 | { | |
5000 | } | |
5001 | ||
02b9b4fd | 5002 | void |
6720a7fb JB |
5003 | syms_of_process () |
5004 | { | |
5005 | defsubr (&Sget_buffer_process); | |
52a1b894 | 5006 | defsubr (&Sprocess_inherit_coding_system_flag); |
6720a7fb JB |
5007 | } |
5008 | ||
5009 | \f | |
5010 | #endif /* not subprocesses */ |