Commit | Line | Data |
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d0d6b7c5 | 1 | /* Asynchronous subprocess control for GNU Emacs. |
dd2a17ab KS |
2 | Copyright (C) 1985, 86, 87, 88, 93, 94, 95, 96, 98, 1999, |
3 | 2001, 2002 Free Software Foundation, Inc. | |
d0d6b7c5 JB |
4 | |
5 | This file is part of GNU Emacs. | |
6 | ||
7 | GNU Emacs is free software; you can redistribute it and/or modify | |
8 | it under the terms of the GNU General Public License as published by | |
1dc77cc3 | 9 | the Free Software Foundation; either version 2, or (at your option) |
d0d6b7c5 JB |
10 | any later version. |
11 | ||
12 | GNU Emacs is distributed in the hope that it will be useful, | |
13 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
15 | GNU General Public License for more details. | |
16 | ||
17 | You should have received a copy of the GNU General Public License | |
18 | along with GNU Emacs; see the file COPYING. If not, write to | |
3b7ad313 EN |
19 | the Free Software Foundation, Inc., 59 Temple Place - Suite 330, |
20 | Boston, MA 02111-1307, USA. */ | |
d0d6b7c5 JB |
21 | |
22 | ||
827a1788 | 23 | #define _GNU_SOURCE /* to get strsignal declared with glibc 2 */ |
18160b98 | 24 | #include <config.h> |
68c45bf0 PE |
25 | #include <signal.h> |
26 | ||
6720a7fb JB |
27 | /* This file is split into two parts by the following preprocessor |
28 | conditional. The 'then' clause contains all of the support for | |
29 | asynchronous subprocesses. The 'else' clause contains stub | |
30 | versions of some of the asynchronous subprocess routines that are | |
31 | often called elsewhere in Emacs, so we don't have to #ifdef the | |
32 | sections that call them. */ | |
33 | ||
34 | \f | |
d0d6b7c5 | 35 | #ifdef subprocesses |
d0d6b7c5 JB |
36 | |
37 | #include <stdio.h> | |
38 | #include <errno.h> | |
39 | #include <setjmp.h> | |
40 | #include <sys/types.h> /* some typedefs are used in sys/file.h */ | |
41 | #include <sys/file.h> | |
42 | #include <sys/stat.h> | |
93b4f699 RS |
43 | #ifdef HAVE_UNISTD_H |
44 | #include <unistd.h> | |
45 | #endif | |
d0d6b7c5 | 46 | |
f22ac298 | 47 | #if defined(WINDOWSNT) || defined(UNIX98_PTYS) |
e98d950b RS |
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 */ | |
e690ca94 KS |
60 | |
61 | /* Are local (unix) sockets supported? */ | |
62 | #ifndef NO_SOCKETS_IN_FILE_SYSTEM | |
63 | #if !defined (AF_LOCAL) && defined (AF_UNIX) | |
64 | #define AF_LOCAL AF_UNIX | |
65 | #endif | |
66 | #ifdef AF_LOCAL | |
67 | #define HAVE_LOCAL_SOCKETS | |
68 | #include <sys/un.h> | |
69 | #endif | |
70 | #endif | |
d0d6b7c5 JB |
71 | #endif /* HAVE_SOCKETS */ |
72 | ||
827a1788 | 73 | /* TERM is a poor-man's SLIP, used on GNU/Linux. */ |
1d2c16fa RS |
74 | #ifdef TERM |
75 | #include <client.h> | |
76 | #endif | |
77 | ||
cf32fea0 PR |
78 | /* On some systems, e.g. DGUX, inet_addr returns a 'struct in_addr'. */ |
79 | #ifdef HAVE_BROKEN_INET_ADDR | |
79967d5e RS |
80 | #define IN_ADDR struct in_addr |
81 | #define NUMERIC_ADDR_ERROR (numeric_addr.s_addr == -1) | |
82 | #else | |
83 | #define IN_ADDR unsigned long | |
84 | #define NUMERIC_ADDR_ERROR (numeric_addr == -1) | |
85 | #endif | |
86 | ||
6df54671 | 87 | #if defined(BSD_SYSTEM) || defined(STRIDE) |
d0d6b7c5 | 88 | #include <sys/ioctl.h> |
0ad77c54 | 89 | #if !defined (O_NDELAY) && defined (HAVE_PTYS) && !defined(USG5) |
d0d6b7c5 JB |
90 | #include <fcntl.h> |
91 | #endif /* HAVE_PTYS and no O_NDELAY */ | |
6df54671 | 92 | #endif /* BSD_SYSTEM || STRIDE */ |
d0d6b7c5 | 93 | |
99e3d726 RS |
94 | #ifdef BROKEN_O_NONBLOCK |
95 | #undef O_NONBLOCK | |
96 | #endif /* BROKEN_O_NONBLOCK */ | |
97 | ||
d0d6b7c5 JB |
98 | #ifdef NEED_BSDTTY |
99 | #include <bsdtty.h> | |
100 | #endif | |
101 | ||
d0d6b7c5 JB |
102 | #ifdef IRIS |
103 | #include <sys/sysmacros.h> /* for "minor" */ | |
104 | #endif /* not IRIS */ | |
105 | ||
106 | #include "systime.h" | |
36ebaafa | 107 | #include "systty.h" |
d0d6b7c5 JB |
108 | |
109 | #include "lisp.h" | |
110 | #include "window.h" | |
111 | #include "buffer.h" | |
0fa1789e KH |
112 | #include "charset.h" |
113 | #include "coding.h" | |
d0d6b7c5 JB |
114 | #include "process.h" |
115 | #include "termhooks.h" | |
116 | #include "termopts.h" | |
117 | #include "commands.h" | |
3ec68006 | 118 | #include "keyboard.h" |
1dc77cc3 | 119 | #include "frame.h" |
ececcbec | 120 | #include "blockinput.h" |
dfcf069d | 121 | #include "dispextern.h" |
e0016554 | 122 | #include "composite.h" |
30904ab7 | 123 | #include "atimer.h" |
d0d6b7c5 | 124 | |
dd2281ae | 125 | Lisp_Object Qprocessp; |
dd2a17ab | 126 | Lisp_Object Qrun, Qstop, Qsignal; |
e690ca94 KS |
127 | Lisp_Object Qopen, Qclosed, Qconnect, Qfailed, Qlisten; |
128 | Lisp_Object Qlocal; | |
129 | Lisp_Object QCname, QCbuffer, QChost, QCservice, QCfamily; | |
130 | Lisp_Object QClocal, QCremote, QCcoding; | |
131 | Lisp_Object QCserver, QCdatagram, QCnowait, QCnoquery, QCstop; | |
132 | Lisp_Object QCfilter, QCsentinel, QClog, QCoptions, QCfeature; | |
6545aada | 133 | Lisp_Object Qlast_nonmenu_event; |
d0d6b7c5 JB |
134 | /* Qexit is declared and initialized in eval.c. */ |
135 | ||
136 | /* a process object is a network connection when its childp field is neither | |
de282a05 | 137 | Qt nor Qnil but is instead a cons cell (HOSTNAME PORTNUM). */ |
d0d6b7c5 JB |
138 | |
139 | #ifdef HAVE_SOCKETS | |
de282a05 | 140 | #define NETCONN_P(p) (GC_CONSP (XPROCESS (p)->childp)) |
e690ca94 | 141 | #define NETCONN1_P(p) (GC_CONSP ((p)->childp)) |
d0d6b7c5 JB |
142 | #else |
143 | #define NETCONN_P(p) 0 | |
e690ca94 | 144 | #define NETCONN1_P(p) 0 |
d0d6b7c5 JB |
145 | #endif /* HAVE_SOCKETS */ |
146 | ||
147 | /* Define first descriptor number available for subprocesses. */ | |
148 | #ifdef VMS | |
149 | #define FIRST_PROC_DESC 1 | |
150 | #else /* Not VMS */ | |
151 | #define FIRST_PROC_DESC 3 | |
152 | #endif | |
153 | ||
154 | /* Define SIGCHLD as an alias for SIGCLD. There are many conditionals | |
155 | testing SIGCHLD. */ | |
156 | ||
157 | #if !defined (SIGCHLD) && defined (SIGCLD) | |
158 | #define SIGCHLD SIGCLD | |
159 | #endif /* SIGCLD */ | |
160 | ||
161 | #include "syssignal.h" | |
162 | ||
889255b4 | 163 | #include "syswait.h" |
d0d6b7c5 | 164 | |
41d03b9a GM |
165 | extern void set_waiting_for_input P_ ((EMACS_TIME *)); |
166 | ||
3ec68006 | 167 | #ifndef USE_CRT_DLL |
b062d1fe | 168 | extern int errno; |
3ec68006 | 169 | #endif |
b062d1fe | 170 | #ifdef VMS |
d0d6b7c5 | 171 | extern char *sys_errlist[]; |
b062d1fe | 172 | #endif |
d0d6b7c5 | 173 | |
5f0929a7 RS |
174 | #ifndef HAVE_H_ERRNO |
175 | extern int h_errno; | |
176 | #endif | |
177 | ||
d0d6b7c5 JB |
178 | /* t means use pty, nil means use a pipe, |
179 | maybe other values to come. */ | |
dd2281ae | 180 | static Lisp_Object Vprocess_connection_type; |
d0d6b7c5 JB |
181 | |
182 | #ifdef SKTPAIR | |
183 | #ifndef HAVE_SOCKETS | |
184 | #include <sys/socket.h> | |
185 | #endif | |
186 | #endif /* SKTPAIR */ | |
187 | ||
17d02632 KH |
188 | /* These next two vars are non-static since sysdep.c uses them in the |
189 | emulation of `select'. */ | |
d0d6b7c5 | 190 | /* Number of events of change of status of a process. */ |
17d02632 | 191 | int process_tick; |
d0d6b7c5 | 192 | /* Number of events for which the user or sentinel has been notified. */ |
17d02632 | 193 | int update_tick; |
d0d6b7c5 | 194 | |
dd2a17ab KS |
195 | /* Define NON_BLOCKING_CONNECT if we can support non-blocking connects. */ |
196 | ||
197 | #ifdef BROKEN_NON_BLOCKING_CONNECT | |
198 | #undef NON_BLOCKING_CONNECT | |
199 | #else | |
200 | #ifndef NON_BLOCKING_CONNECT | |
201 | #ifdef HAVE_SOCKETS | |
202 | #ifdef HAVE_SELECT | |
203 | #if defined (HAVE_GETPEERNAME) || defined (GNU_LINUX) | |
204 | #if defined (O_NONBLOCK) || defined (O_NDELAY) | |
205 | #if defined (EWOULDBLOCK) || defined (EINPROGRESS) | |
206 | #define NON_BLOCKING_CONNECT | |
207 | #endif /* EWOULDBLOCK || EINPROGRESS */ | |
208 | #endif /* O_NONBLOCK || O_NDELAY */ | |
209 | #endif /* HAVE_GETPEERNAME || GNU_LINUX */ | |
210 | #endif /* HAVE_SELECT */ | |
211 | #endif /* HAVE_SOCKETS */ | |
212 | #endif /* NON_BLOCKING_CONNECT */ | |
213 | #endif /* BROKEN_NON_BLOCKING_CONNECT */ | |
214 | ||
e690ca94 KS |
215 | /* Define DATAGRAM_SOCKETS if datagrams can be used safely on |
216 | this system. We need to read full packets, so we need a | |
217 | "non-destructive" select. So we require either native select, | |
218 | or emulation of select using FIONREAD. */ | |
219 | ||
220 | #ifdef GNU_LINUX | |
221 | /* These are not yet in configure.in (they will be eventually) | |
222 | -- so add them here temporarily. ++kfs */ | |
223 | #define HAVE_RECVFROM | |
224 | #define HAVE_SENDTO | |
225 | #define HAVE_GETSOCKNAME | |
226 | #endif | |
227 | ||
228 | #ifdef BROKEN_DATAGRAM_SOCKETS | |
229 | #undef DATAGRAM_SOCKETS | |
230 | #else | |
231 | #ifndef DATAGRAM_SOCKETS | |
232 | #ifdef HAVE_SOCKETS | |
233 | #if defined (HAVE_SELECT) || defined (FIONREAD) | |
234 | #if defined (HAVE_SENDTO) && defined (HAVE_RECVFROM) && defined (EMSGSIZE) | |
235 | #define DATAGRAM_SOCKETS | |
236 | #endif /* HAVE_SENDTO && HAVE_RECVFROM && EMSGSIZE */ | |
237 | #endif /* HAVE_SELECT || FIONREAD */ | |
238 | #endif /* HAVE_SOCKETS */ | |
239 | #endif /* DATAGRAM_SOCKETS */ | |
240 | #endif /* BROKEN_DATAGRAM_SOCKETS */ | |
241 | ||
dd2a17ab KS |
242 | #ifdef TERM |
243 | #undef NON_BLOCKING_CONNECT | |
e690ca94 | 244 | #undef DATAGRAM_SOCKETS |
dd2a17ab KS |
245 | #endif |
246 | ||
e690ca94 | 247 | |
5886acf9 | 248 | #include "sysselect.h" |
d0d6b7c5 | 249 | |
41d03b9a GM |
250 | extern int keyboard_bit_set P_ ((SELECT_TYPE *)); |
251 | ||
583dcae4 | 252 | /* If we support a window system, turn on the code to poll periodically |
44ade2e9 | 253 | to detect C-g. It isn't actually used when doing interrupt input. */ |
583dcae4 | 254 | #ifdef HAVE_WINDOW_SYSTEM |
44ade2e9 RS |
255 | #define POLL_FOR_INPUT |
256 | #endif | |
257 | ||
a69281ff | 258 | /* Mask of bits indicating the descriptors that we wait for input on. */ |
d0d6b7c5 | 259 | |
dd2281ae RS |
260 | static SELECT_TYPE input_wait_mask; |
261 | ||
a69281ff RS |
262 | /* Mask that excludes keyboard input descriptor (s). */ |
263 | ||
264 | static SELECT_TYPE non_keyboard_wait_mask; | |
265 | ||
b5dc1c83 RS |
266 | /* Mask that excludes process input descriptor (s). */ |
267 | ||
268 | static SELECT_TYPE non_process_wait_mask; | |
269 | ||
dd2a17ab KS |
270 | /* Mask of bits indicating the descriptors that we wait for connect to |
271 | complete on. Once they complete, they are removed from this mask | |
272 | and added to the input_wait_mask and non_keyboard_wait_mask. */ | |
273 | ||
274 | static SELECT_TYPE connect_wait_mask; | |
275 | ||
276 | /* Number of bits set in connect_wait_mask. */ | |
277 | static int num_pending_connects; | |
278 | ||
7d0e672e RS |
279 | /* The largest descriptor currently in use for a process object. */ |
280 | static int max_process_desc; | |
281 | ||
a69281ff RS |
282 | /* The largest descriptor currently in use for keyboard input. */ |
283 | static int max_keyboard_desc; | |
d0d6b7c5 | 284 | |
dd2281ae RS |
285 | /* Nonzero means delete a process right away if it exits. */ |
286 | static int delete_exited_processes; | |
d0d6b7c5 JB |
287 | |
288 | /* Indexed by descriptor, gives the process (if any) for that descriptor */ | |
41f3aa98 | 289 | Lisp_Object chan_process[MAXDESC]; |
d0d6b7c5 JB |
290 | |
291 | /* Alist of elements (NAME . PROCESS) */ | |
41f3aa98 | 292 | Lisp_Object Vprocess_alist; |
d0d6b7c5 JB |
293 | |
294 | /* Buffered-ahead input char from process, indexed by channel. | |
295 | -1 means empty (no char is buffered). | |
296 | Used on sys V where the only way to tell if there is any | |
297 | output from the process is to read at least one char. | |
298 | Always -1 on systems that support FIONREAD. */ | |
299 | ||
e98d950b RS |
300 | /* Don't make static; need to access externally. */ |
301 | int proc_buffered_char[MAXDESC]; | |
dd2281ae | 302 | |
0fa1789e | 303 | /* Table of `struct coding-system' for each process. */ |
c7580538 KH |
304 | static struct coding_system *proc_decode_coding_system[MAXDESC]; |
305 | static struct coding_system *proc_encode_coding_system[MAXDESC]; | |
0fa1789e | 306 | |
e690ca94 KS |
307 | #ifdef DATAGRAM_SOCKETS |
308 | /* Table of `partner address' for datagram sockets. */ | |
309 | struct sockaddr_and_len { | |
310 | struct sockaddr *sa; | |
311 | int len; | |
312 | } datagram_address[MAXDESC]; | |
313 | #define DATAGRAM_CHAN_P(chan) (datagram_address[chan].sa != 0) | |
314 | #define DATAGRAM_CONN_P(proc) (datagram_address[XPROCESS (proc)->infd].sa != 0) | |
315 | #else | |
316 | #define DATAGRAM_CHAN_P(chan) (0) | |
317 | #define DATAGRAM_CONN_P(proc) (0) | |
318 | #endif | |
319 | ||
dd2281ae | 320 | static Lisp_Object get_process (); |
dd2a17ab | 321 | static void exec_sentinel (); |
93b4f699 | 322 | |
fb4c3627 | 323 | extern EMACS_TIME timer_check (); |
5de50bfb | 324 | extern int timers_run; |
fb4c3627 | 325 | |
93b4f699 RS |
326 | /* Maximum number of bytes to send to a pty without an eof. */ |
327 | static int pty_max_bytes; | |
3b9a3dfa | 328 | |
14dc6093 | 329 | extern Lisp_Object Vfile_name_coding_system, Vdefault_file_name_coding_system; |
a932f187 | 330 | |
875e6b94 KH |
331 | #ifdef HAVE_PTYS |
332 | /* The file name of the pty opened by allocate_pty. */ | |
3b9a3dfa RS |
333 | |
334 | static char pty_name[24]; | |
875e6b94 | 335 | #endif |
d0d6b7c5 JB |
336 | \f |
337 | /* Compute the Lisp form of the process status, p->status, from | |
338 | the numeric status that was returned by `wait'. */ | |
339 | ||
f9738840 JB |
340 | Lisp_Object status_convert (); |
341 | ||
dfcf069d | 342 | void |
d0d6b7c5 JB |
343 | update_status (p) |
344 | struct Lisp_Process *p; | |
345 | { | |
346 | union { int i; WAITTYPE wt; } u; | |
347 | u.i = XFASTINT (p->raw_status_low) + (XFASTINT (p->raw_status_high) << 16); | |
348 | p->status = status_convert (u.wt); | |
349 | p->raw_status_low = Qnil; | |
350 | p->raw_status_high = Qnil; | |
351 | } | |
352 | ||
91d10fa8 | 353 | /* Convert a process status word in Unix format to |
d0d6b7c5 JB |
354 | the list that we use internally. */ |
355 | ||
356 | Lisp_Object | |
357 | status_convert (w) | |
358 | WAITTYPE w; | |
359 | { | |
360 | if (WIFSTOPPED (w)) | |
361 | return Fcons (Qstop, Fcons (make_number (WSTOPSIG (w)), Qnil)); | |
362 | else if (WIFEXITED (w)) | |
363 | return Fcons (Qexit, Fcons (make_number (WRETCODE (w)), | |
364 | WCOREDUMP (w) ? Qt : Qnil)); | |
365 | else if (WIFSIGNALED (w)) | |
366 | return Fcons (Qsignal, Fcons (make_number (WTERMSIG (w)), | |
367 | WCOREDUMP (w) ? Qt : Qnil)); | |
368 | else | |
369 | return Qrun; | |
370 | } | |
371 | ||
372 | /* Given a status-list, extract the three pieces of information | |
373 | and store them individually through the three pointers. */ | |
374 | ||
375 | void | |
376 | decode_status (l, symbol, code, coredump) | |
377 | Lisp_Object l; | |
378 | Lisp_Object *symbol; | |
379 | int *code; | |
380 | int *coredump; | |
381 | { | |
382 | Lisp_Object tem; | |
383 | ||
bcd69aea | 384 | if (SYMBOLP (l)) |
d0d6b7c5 JB |
385 | { |
386 | *symbol = l; | |
387 | *code = 0; | |
388 | *coredump = 0; | |
389 | } | |
390 | else | |
391 | { | |
70949dac KR |
392 | *symbol = XCAR (l); |
393 | tem = XCDR (l); | |
394 | *code = XFASTINT (XCAR (tem)); | |
395 | tem = XCDR (tem); | |
d0d6b7c5 JB |
396 | *coredump = !NILP (tem); |
397 | } | |
398 | } | |
399 | ||
400 | /* Return a string describing a process status list. */ | |
401 | ||
402 | Lisp_Object | |
403 | status_message (status) | |
404 | Lisp_Object status; | |
405 | { | |
406 | Lisp_Object symbol; | |
407 | int code, coredump; | |
408 | Lisp_Object string, string2; | |
409 | ||
410 | decode_status (status, &symbol, &code, &coredump); | |
411 | ||
412 | if (EQ (symbol, Qsignal) || EQ (symbol, Qstop)) | |
413 | { | |
68c45bf0 | 414 | char *signame; |
ca9c0567 | 415 | synchronize_system_messages_locale (); |
68c45bf0 | 416 | signame = strsignal (code); |
b97ad9ea RS |
417 | if (signame == 0) |
418 | signame = "unknown"; | |
419 | string = build_string (signame); | |
d0d6b7c5 JB |
420 | string2 = build_string (coredump ? " (core dumped)\n" : "\n"); |
421 | XSTRING (string)->data[0] = DOWNCASE (XSTRING (string)->data[0]); | |
422 | return concat2 (string, string2); | |
423 | } | |
424 | else if (EQ (symbol, Qexit)) | |
425 | { | |
426 | if (code == 0) | |
427 | return build_string ("finished\n"); | |
f2980264 | 428 | string = Fnumber_to_string (make_number (code)); |
d0d6b7c5 | 429 | string2 = build_string (coredump ? " (core dumped)\n" : "\n"); |
e690ca94 KS |
430 | return concat3 (build_string ("exited abnormally with code "), |
431 | string, string2); | |
d0d6b7c5 | 432 | } |
dd2a17ab KS |
433 | else if (EQ (symbol, Qfailed)) |
434 | { | |
435 | string = Fnumber_to_string (make_number (code)); | |
436 | string2 = build_string ("\n"); | |
e690ca94 KS |
437 | return concat3 (build_string ("failed with code "), |
438 | string, string2); | |
dd2a17ab | 439 | } |
d0d6b7c5 JB |
440 | else |
441 | return Fcopy_sequence (Fsymbol_name (symbol)); | |
442 | } | |
443 | \f | |
444 | #ifdef HAVE_PTYS | |
d0d6b7c5 | 445 | |
875e6b94 KH |
446 | /* Open an available pty, returning a file descriptor. |
447 | Return -1 on failure. | |
448 | The file name of the terminal corresponding to the pty | |
449 | is left in the variable pty_name. */ | |
450 | ||
d0d6b7c5 JB |
451 | int |
452 | allocate_pty () | |
453 | { | |
454 | struct stat stb; | |
dfcf069d | 455 | register int c, i; |
d0d6b7c5 JB |
456 | int fd; |
457 | ||
32676c08 JB |
458 | /* Some systems name their pseudoterminals so that there are gaps in |
459 | the usual sequence - for example, on HP9000/S700 systems, there | |
460 | are no pseudoterminals with names ending in 'f'. So we wait for | |
461 | three failures in a row before deciding that we've reached the | |
462 | end of the ptys. */ | |
463 | int failed_count = 0; | |
464 | ||
d0d6b7c5 JB |
465 | #ifdef PTY_ITERATION |
466 | PTY_ITERATION | |
467 | #else | |
468 | for (c = FIRST_PTY_LETTER; c <= 'z'; c++) | |
469 | for (i = 0; i < 16; i++) | |
470 | #endif | |
471 | { | |
472 | #ifdef PTY_NAME_SPRINTF | |
473 | PTY_NAME_SPRINTF | |
d0d6b7c5 JB |
474 | #else |
475 | sprintf (pty_name, "/dev/pty%c%x", c, i); | |
d0d6b7c5 JB |
476 | #endif /* no PTY_NAME_SPRINTF */ |
477 | ||
4d7c105e RS |
478 | #ifdef PTY_OPEN |
479 | PTY_OPEN; | |
480 | #else /* no PTY_OPEN */ | |
32676c08 JB |
481 | #ifdef IRIS |
482 | /* Unusual IRIS code */ | |
68c45bf0 | 483 | *ptyv = emacs_open ("/dev/ptc", O_RDWR | O_NDELAY, 0); |
32676c08 JB |
484 | if (fd < 0) |
485 | return -1; | |
486 | if (fstat (fd, &stb) < 0) | |
d0d6b7c5 | 487 | return -1; |
4d7c105e | 488 | #else /* not IRIS */ |
32676c08 JB |
489 | if (stat (pty_name, &stb) < 0) |
490 | { | |
491 | failed_count++; | |
492 | if (failed_count >= 3) | |
493 | return -1; | |
494 | } | |
495 | else | |
496 | failed_count = 0; | |
d0d6b7c5 | 497 | #ifdef O_NONBLOCK |
68c45bf0 | 498 | fd = emacs_open (pty_name, O_RDWR | O_NONBLOCK, 0); |
d0d6b7c5 | 499 | #else |
68c45bf0 | 500 | fd = emacs_open (pty_name, O_RDWR | O_NDELAY, 0); |
d0d6b7c5 | 501 | #endif |
4d7c105e RS |
502 | #endif /* not IRIS */ |
503 | #endif /* no PTY_OPEN */ | |
d0d6b7c5 JB |
504 | |
505 | if (fd >= 0) | |
506 | { | |
507 | /* check to make certain that both sides are available | |
508 | this avoids a nasty yet stupid bug in rlogins */ | |
509 | #ifdef PTY_TTY_NAME_SPRINTF | |
510 | PTY_TTY_NAME_SPRINTF | |
d0d6b7c5 JB |
511 | #else |
512 | sprintf (pty_name, "/dev/tty%c%x", c, i); | |
d0d6b7c5 JB |
513 | #endif /* no PTY_TTY_NAME_SPRINTF */ |
514 | #ifndef UNIPLUS | |
515 | if (access (pty_name, 6) != 0) | |
516 | { | |
68c45bf0 | 517 | emacs_close (fd); |
fad97cbe | 518 | #if !defined(IRIS) && !defined(__sgi) |
d0d6b7c5 JB |
519 | continue; |
520 | #else | |
521 | return -1; | |
522 | #endif /* IRIS */ | |
523 | } | |
524 | #endif /* not UNIPLUS */ | |
525 | setup_pty (fd); | |
526 | return fd; | |
527 | } | |
528 | } | |
529 | return -1; | |
530 | } | |
531 | #endif /* HAVE_PTYS */ | |
532 | \f | |
533 | Lisp_Object | |
534 | make_process (name) | |
535 | Lisp_Object name; | |
536 | { | |
537 | register Lisp_Object val, tem, name1; | |
538 | register struct Lisp_Process *p; | |
539 | char suffix[10]; | |
540 | register int i; | |
541 | ||
98423852 | 542 | p = allocate_process (); |
23d6bb9c | 543 | |
1d056e64 KH |
544 | XSETINT (p->infd, -1); |
545 | XSETINT (p->outfd, -1); | |
22719df2 KH |
546 | XSETFASTINT (p->pid, 0); |
547 | XSETFASTINT (p->tick, 0); | |
548 | XSETFASTINT (p->update_tick, 0); | |
d0d6b7c5 JB |
549 | p->raw_status_low = Qnil; |
550 | p->raw_status_high = Qnil; | |
551 | p->status = Qrun; | |
552 | p->mark = Fmake_marker (); | |
553 | ||
554 | /* If name is already in use, modify it until it is unused. */ | |
555 | ||
556 | name1 = name; | |
557 | for (i = 1; ; i++) | |
558 | { | |
559 | tem = Fget_process (name1); | |
560 | if (NILP (tem)) break; | |
561 | sprintf (suffix, "<%d>", i); | |
562 | name1 = concat2 (name, build_string (suffix)); | |
563 | } | |
564 | name = name1; | |
565 | p->name = name; | |
23d6bb9c | 566 | XSETPROCESS (val, p); |
d0d6b7c5 JB |
567 | Vprocess_alist = Fcons (Fcons (name, val), Vprocess_alist); |
568 | return val; | |
569 | } | |
570 | ||
dfcf069d | 571 | void |
d0d6b7c5 JB |
572 | remove_process (proc) |
573 | register Lisp_Object proc; | |
574 | { | |
575 | register Lisp_Object pair; | |
576 | ||
577 | pair = Frassq (proc, Vprocess_alist); | |
578 | Vprocess_alist = Fdelq (pair, Vprocess_alist); | |
d0d6b7c5 JB |
579 | |
580 | deactivate_process (proc); | |
581 | } | |
582 | \f | |
583 | DEFUN ("processp", Fprocessp, Sprocessp, 1, 1, 0, | |
fdb82f93 PJ |
584 | doc: /* Return t if OBJECT is a process. */) |
585 | (object) | |
4ee3e309 | 586 | Lisp_Object object; |
d0d6b7c5 | 587 | { |
4ee3e309 | 588 | return PROCESSP (object) ? Qt : Qnil; |
d0d6b7c5 JB |
589 | } |
590 | ||
591 | DEFUN ("get-process", Fget_process, Sget_process, 1, 1, 0, | |
fdb82f93 PJ |
592 | doc: /* Return the process named NAME, or nil if there is none. */) |
593 | (name) | |
d0d6b7c5 JB |
594 | register Lisp_Object name; |
595 | { | |
bcd69aea | 596 | if (PROCESSP (name)) |
d0d6b7c5 | 597 | return name; |
b7826503 | 598 | CHECK_STRING (name); |
d0d6b7c5 JB |
599 | return Fcdr (Fassoc (name, Vprocess_alist)); |
600 | } | |
601 | ||
602 | DEFUN ("get-buffer-process", Fget_buffer_process, Sget_buffer_process, 1, 1, 0, | |
fdb82f93 PJ |
603 | doc: /* Return the (or a) process associated with BUFFER. |
604 | BUFFER may be a buffer or the name of one. */) | |
605 | (buffer) | |
4ee3e309 | 606 | register Lisp_Object buffer; |
d0d6b7c5 JB |
607 | { |
608 | register Lisp_Object buf, tail, proc; | |
609 | ||
4ee3e309 EN |
610 | if (NILP (buffer)) return Qnil; |
611 | buf = Fget_buffer (buffer); | |
d0d6b7c5 JB |
612 | if (NILP (buf)) return Qnil; |
613 | ||
614 | for (tail = Vprocess_alist; !NILP (tail); tail = Fcdr (tail)) | |
615 | { | |
616 | proc = Fcdr (Fcar (tail)); | |
bcd69aea | 617 | if (PROCESSP (proc) && EQ (XPROCESS (proc)->buffer, buf)) |
d0d6b7c5 JB |
618 | return proc; |
619 | } | |
620 | return Qnil; | |
621 | } | |
622 | ||
ebb9e16f JB |
623 | /* This is how commands for the user decode process arguments. It |
624 | accepts a process, a process name, a buffer, a buffer name, or nil. | |
625 | Buffers denote the first process in the buffer, and nil denotes the | |
626 | current buffer. */ | |
d0d6b7c5 | 627 | |
77b221b1 | 628 | static Lisp_Object |
d0d6b7c5 JB |
629 | get_process (name) |
630 | register Lisp_Object name; | |
631 | { | |
1619761d KH |
632 | register Lisp_Object proc, obj; |
633 | if (STRINGP (name)) | |
634 | { | |
635 | obj = Fget_process (name); | |
636 | if (NILP (obj)) | |
637 | obj = Fget_buffer (name); | |
638 | if (NILP (obj)) | |
639 | error ("Process %s does not exist", XSTRING (name)->data); | |
640 | } | |
641 | else if (NILP (name)) | |
642 | obj = Fcurrent_buffer (); | |
d0d6b7c5 | 643 | else |
1619761d KH |
644 | obj = name; |
645 | ||
646 | /* Now obj should be either a buffer object or a process object. | |
647 | */ | |
648 | if (BUFFERP (obj)) | |
d0d6b7c5 | 649 | { |
1619761d | 650 | proc = Fget_buffer_process (obj); |
d0d6b7c5 | 651 | if (NILP (proc)) |
1619761d | 652 | error ("Buffer %s has no process", XSTRING (XBUFFER (obj)->name)->data); |
d0d6b7c5 | 653 | } |
d0d6b7c5 | 654 | else |
1619761d | 655 | { |
b7826503 | 656 | CHECK_PROCESS (obj); |
1619761d KH |
657 | proc = obj; |
658 | } | |
659 | return proc; | |
d0d6b7c5 JB |
660 | } |
661 | ||
662 | DEFUN ("delete-process", Fdelete_process, Sdelete_process, 1, 1, 0, | |
fdb82f93 PJ |
663 | doc: /* Delete PROCESS: kill it and forget about it immediately. |
664 | PROCESS may be a process, a buffer, the name of a process or buffer, or | |
665 | nil, indicating the current buffer's process. */) | |
666 | (process) | |
4ee3e309 | 667 | register Lisp_Object process; |
d0d6b7c5 | 668 | { |
4ee3e309 EN |
669 | process = get_process (process); |
670 | XPROCESS (process)->raw_status_low = Qnil; | |
671 | XPROCESS (process)->raw_status_high = Qnil; | |
672 | if (NETCONN_P (process)) | |
d0d6b7c5 | 673 | { |
4ee3e309 EN |
674 | XPROCESS (process)->status = Fcons (Qexit, Fcons (make_number (0), Qnil)); |
675 | XSETINT (XPROCESS (process)->tick, ++process_tick); | |
d0d6b7c5 | 676 | } |
4ee3e309 | 677 | else if (XINT (XPROCESS (process)->infd) >= 0) |
d0d6b7c5 | 678 | { |
4ee3e309 | 679 | Fkill_process (process, Qnil); |
d0d6b7c5 | 680 | /* Do this now, since remove_process will make sigchld_handler do nothing. */ |
4ee3e309 | 681 | XPROCESS (process)->status |
d0d6b7c5 | 682 | = Fcons (Qsignal, Fcons (make_number (SIGKILL), Qnil)); |
4ee3e309 | 683 | XSETINT (XPROCESS (process)->tick, ++process_tick); |
d0d6b7c5 JB |
684 | status_notify (); |
685 | } | |
4ee3e309 | 686 | remove_process (process); |
d0d6b7c5 JB |
687 | return Qnil; |
688 | } | |
689 | \f | |
690 | DEFUN ("process-status", Fprocess_status, Sprocess_status, 1, 1, 0, | |
fdb82f93 PJ |
691 | doc: /* Return the status of PROCESS. |
692 | The returned value is one of the following symbols: | |
693 | run -- for a process that is running. | |
694 | stop -- for a process stopped but continuable. | |
695 | exit -- for a process that has exited. | |
696 | signal -- for a process that has got a fatal signal. | |
697 | open -- for a network stream connection that is open. | |
e690ca94 | 698 | listen -- for a network stream server that is listening. |
fdb82f93 | 699 | closed -- for a network stream connection that is closed. |
e4984112 KS |
700 | connect -- when waiting for a non-blocking connection to complete. |
701 | failed -- when a non-blocking connection has failed. | |
fdb82f93 PJ |
702 | nil -- if arg is a process name and no such process exists. |
703 | PROCESS may be a process, a buffer, the name of a process, or | |
704 | nil, indicating the current buffer's process. */) | |
705 | (process) | |
4ee3e309 | 706 | register Lisp_Object process; |
d0d6b7c5 JB |
707 | { |
708 | register struct Lisp_Process *p; | |
709 | register Lisp_Object status; | |
343f4114 | 710 | |
4ee3e309 EN |
711 | if (STRINGP (process)) |
712 | process = Fget_process (process); | |
343f4114 | 713 | else |
4ee3e309 | 714 | process = get_process (process); |
343f4114 | 715 | |
4ee3e309 EN |
716 | if (NILP (process)) |
717 | return process; | |
343f4114 | 718 | |
4ee3e309 | 719 | p = XPROCESS (process); |
d0d6b7c5 JB |
720 | if (!NILP (p->raw_status_low)) |
721 | update_status (p); | |
722 | status = p->status; | |
bcd69aea | 723 | if (CONSP (status)) |
70949dac | 724 | status = XCAR (status); |
e690ca94 | 725 | if (NETCONN1_P (p)) |
d0d6b7c5 | 726 | { |
e690ca94 | 727 | if (EQ (status, Qexit)) |
d0d6b7c5 | 728 | status = Qclosed; |
e690ca94 KS |
729 | else if (EQ (p->command, Qt)) |
730 | status = Qstop; | |
731 | else if (EQ (status, Qrun)) | |
732 | status = Qopen; | |
d0d6b7c5 JB |
733 | } |
734 | return status; | |
735 | } | |
736 | ||
737 | DEFUN ("process-exit-status", Fprocess_exit_status, Sprocess_exit_status, | |
738 | 1, 1, 0, | |
fdb82f93 PJ |
739 | doc: /* Return the exit status of PROCESS or the signal number that killed it. |
740 | If PROCESS has not yet exited or died, return 0. */) | |
741 | (process) | |
4ee3e309 | 742 | register Lisp_Object process; |
d0d6b7c5 | 743 | { |
b7826503 | 744 | CHECK_PROCESS (process); |
4ee3e309 EN |
745 | if (!NILP (XPROCESS (process)->raw_status_low)) |
746 | update_status (XPROCESS (process)); | |
747 | if (CONSP (XPROCESS (process)->status)) | |
70949dac | 748 | return XCAR (XCDR (XPROCESS (process)->status)); |
d0d6b7c5 JB |
749 | return make_number (0); |
750 | } | |
751 | ||
752 | DEFUN ("process-id", Fprocess_id, Sprocess_id, 1, 1, 0, | |
fdb82f93 PJ |
753 | doc: /* Return the process id of PROCESS. |
754 | This is the pid of the Unix process which PROCESS uses or talks to. | |
755 | For a network connection, this value is nil. */) | |
756 | (process) | |
4ee3e309 | 757 | register Lisp_Object process; |
d0d6b7c5 | 758 | { |
b7826503 | 759 | CHECK_PROCESS (process); |
4ee3e309 | 760 | return XPROCESS (process)->pid; |
d0d6b7c5 JB |
761 | } |
762 | ||
763 | DEFUN ("process-name", Fprocess_name, Sprocess_name, 1, 1, 0, | |
fdb82f93 PJ |
764 | doc: /* Return the name of PROCESS, as a string. |
765 | This is the name of the program invoked in PROCESS, | |
766 | possibly modified to make it unique among process names. */) | |
767 | (process) | |
4ee3e309 | 768 | register Lisp_Object process; |
d0d6b7c5 | 769 | { |
b7826503 | 770 | CHECK_PROCESS (process); |
4ee3e309 | 771 | return XPROCESS (process)->name; |
d0d6b7c5 JB |
772 | } |
773 | ||
774 | DEFUN ("process-command", Fprocess_command, Sprocess_command, 1, 1, 0, | |
fdb82f93 PJ |
775 | doc: /* Return the command that was executed to start PROCESS. |
776 | This is a list of strings, the first string being the program executed | |
777 | and the rest of the strings being the arguments given to it. | |
778 | For a non-child channel, this is nil. */) | |
779 | (process) | |
4ee3e309 | 780 | register Lisp_Object process; |
d0d6b7c5 | 781 | { |
b7826503 | 782 | CHECK_PROCESS (process); |
4ee3e309 | 783 | return XPROCESS (process)->command; |
d0d6b7c5 JB |
784 | } |
785 | ||
3b9a3dfa | 786 | DEFUN ("process-tty-name", Fprocess_tty_name, Sprocess_tty_name, 1, 1, 0, |
fdb82f93 PJ |
787 | doc: /* Return the name of the terminal PROCESS uses, or nil if none. |
788 | This is the terminal that the process itself reads and writes on, | |
789 | not the name of the pty that Emacs uses to talk with that terminal. */) | |
790 | (process) | |
4ee3e309 | 791 | register Lisp_Object process; |
3b9a3dfa | 792 | { |
b7826503 | 793 | CHECK_PROCESS (process); |
4ee3e309 | 794 | return XPROCESS (process)->tty_name; |
3b9a3dfa RS |
795 | } |
796 | ||
d0d6b7c5 | 797 | DEFUN ("set-process-buffer", Fset_process_buffer, Sset_process_buffer, |
fdb82f93 PJ |
798 | 2, 2, 0, |
799 | doc: /* Set buffer associated with PROCESS to BUFFER (a buffer, or nil). */) | |
800 | (process, buffer) | |
4ee3e309 | 801 | register Lisp_Object process, buffer; |
d0d6b7c5 | 802 | { |
e690ca94 KS |
803 | struct Lisp_Process *p; |
804 | ||
b7826503 | 805 | CHECK_PROCESS (process); |
d0d6b7c5 | 806 | if (!NILP (buffer)) |
b7826503 | 807 | CHECK_BUFFER (buffer); |
e690ca94 KS |
808 | p = XPROCESS (process); |
809 | p->buffer = buffer; | |
810 | if (NETCONN1_P (p)) | |
811 | p->childp = Fplist_put (p->childp, QCbuffer, buffer); | |
d0d6b7c5 JB |
812 | return buffer; |
813 | } | |
814 | ||
815 | DEFUN ("process-buffer", Fprocess_buffer, Sprocess_buffer, | |
fdb82f93 PJ |
816 | 1, 1, 0, |
817 | doc: /* Return the buffer PROCESS is associated with. | |
818 | Output from PROCESS is inserted in this buffer unless PROCESS has a filter. */) | |
819 | (process) | |
4ee3e309 | 820 | register Lisp_Object process; |
d0d6b7c5 | 821 | { |
b7826503 | 822 | CHECK_PROCESS (process); |
4ee3e309 | 823 | return XPROCESS (process)->buffer; |
d0d6b7c5 JB |
824 | } |
825 | ||
826 | DEFUN ("process-mark", Fprocess_mark, Sprocess_mark, | |
fdb82f93 PJ |
827 | 1, 1, 0, |
828 | doc: /* Return the marker for the end of the last output from PROCESS. */) | |
829 | (process) | |
4ee3e309 | 830 | register Lisp_Object process; |
d0d6b7c5 | 831 | { |
b7826503 | 832 | CHECK_PROCESS (process); |
4ee3e309 | 833 | return XPROCESS (process)->mark; |
d0d6b7c5 JB |
834 | } |
835 | ||
836 | DEFUN ("set-process-filter", Fset_process_filter, Sset_process_filter, | |
fdb82f93 PJ |
837 | 2, 2, 0, |
838 | doc: /* Give PROCESS the filter function FILTER; nil means no filter. | |
839 | t means stop accepting output from the process. | |
840 | When a process has a filter, each time it does output | |
841 | the entire string of output is passed to the filter. | |
842 | The filter gets two arguments: the process and the string of output. | |
843 | If the process has a filter, its buffer is not used for output. */) | |
844 | (process, filter) | |
4ee3e309 | 845 | register Lisp_Object process, filter; |
d0d6b7c5 | 846 | { |
471f86b9 GM |
847 | struct Lisp_Process *p; |
848 | ||
b7826503 | 849 | CHECK_PROCESS (process); |
471f86b9 GM |
850 | p = XPROCESS (process); |
851 | ||
852 | /* Don't signal an error if the process' input file descriptor | |
853 | is closed. This could make debugging Lisp more difficult, | |
854 | for example when doing something like | |
855 | ||
856 | (setq process (start-process ...)) | |
857 | (debug) | |
858 | (set-process-filter process ...) */ | |
859 | ||
860 | if (XINT (p->infd) >= 0) | |
a69281ff | 861 | { |
e690ca94 | 862 | if (EQ (filter, Qt) && !EQ (p->status, Qlisten)) |
471f86b9 GM |
863 | { |
864 | FD_CLR (XINT (p->infd), &input_wait_mask); | |
865 | FD_CLR (XINT (p->infd), &non_keyboard_wait_mask); | |
866 | } | |
e690ca94 KS |
867 | else if (EQ (p->filter, Qt) |
868 | && !EQ (p->command, Qt)) /* Network process not stopped. */ | |
471f86b9 GM |
869 | { |
870 | FD_SET (XINT (p->infd), &input_wait_mask); | |
871 | FD_SET (XINT (p->infd), &non_keyboard_wait_mask); | |
872 | } | |
a69281ff | 873 | } |
471f86b9 GM |
874 | |
875 | p->filter = filter; | |
e690ca94 KS |
876 | if (NETCONN1_P (p)) |
877 | p->childp = Fplist_put (p->childp, QCfilter, filter); | |
d0d6b7c5 JB |
878 | return filter; |
879 | } | |
880 | ||
881 | DEFUN ("process-filter", Fprocess_filter, Sprocess_filter, | |
fdb82f93 PJ |
882 | 1, 1, 0, |
883 | doc: /* Returns the filter function of PROCESS; nil if none. | |
884 | See `set-process-filter' for more info on filter functions. */) | |
885 | (process) | |
4ee3e309 | 886 | register Lisp_Object process; |
d0d6b7c5 | 887 | { |
b7826503 | 888 | CHECK_PROCESS (process); |
4ee3e309 | 889 | return XPROCESS (process)->filter; |
d0d6b7c5 JB |
890 | } |
891 | ||
892 | DEFUN ("set-process-sentinel", Fset_process_sentinel, Sset_process_sentinel, | |
fdb82f93 PJ |
893 | 2, 2, 0, |
894 | doc: /* Give PROCESS the sentinel SENTINEL; nil for none. | |
895 | The sentinel is called as a function when the process changes state. | |
896 | It gets two arguments: the process, and a string describing the change. */) | |
897 | (process, sentinel) | |
4ee3e309 | 898 | register Lisp_Object process, sentinel; |
d0d6b7c5 | 899 | { |
b7826503 | 900 | CHECK_PROCESS (process); |
4ee3e309 | 901 | XPROCESS (process)->sentinel = sentinel; |
d0d6b7c5 JB |
902 | return sentinel; |
903 | } | |
904 | ||
905 | DEFUN ("process-sentinel", Fprocess_sentinel, Sprocess_sentinel, | |
fdb82f93 PJ |
906 | 1, 1, 0, |
907 | doc: /* Return the sentinel of PROCESS; nil if none. | |
908 | See `set-process-sentinel' for more info on sentinels. */) | |
909 | (process) | |
4ee3e309 | 910 | register Lisp_Object process; |
d0d6b7c5 | 911 | { |
b7826503 | 912 | CHECK_PROCESS (process); |
4ee3e309 | 913 | return XPROCESS (process)->sentinel; |
d0d6b7c5 JB |
914 | } |
915 | ||
396df322 | 916 | DEFUN ("set-process-window-size", Fset_process_window_size, |
fdb82f93 PJ |
917 | Sset_process_window_size, 3, 3, 0, |
918 | doc: /* Tell PROCESS that it has logical window size HEIGHT and WIDTH. */) | |
919 | (process, height, width) | |
4ee3e309 | 920 | register Lisp_Object process, height, width; |
396df322 | 921 | { |
b7826503 PJ |
922 | CHECK_PROCESS (process); |
923 | CHECK_NATNUM (height); | |
924 | CHECK_NATNUM (width); | |
471f86b9 | 925 | |
989521fd | 926 | if (XINT (XPROCESS (process)->infd) < 0 |
471f86b9 GM |
927 | || set_window_size (XINT (XPROCESS (process)->infd), |
928 | XINT (height), XINT (width)) <= 0) | |
396df322 RS |
929 | return Qnil; |
930 | else | |
931 | return Qt; | |
932 | } | |
933 | ||
52a1b894 | 934 | DEFUN ("set-process-inherit-coding-system-flag", |
fdb82f93 PJ |
935 | Fset_process_inherit_coding_system_flag, |
936 | Sset_process_inherit_coding_system_flag, 2, 2, 0, | |
937 | doc: /* Determine whether buffer of PROCESS will inherit coding-system. | |
938 | If the second argument FLAG is non-nil, then the variable | |
939 | `buffer-file-coding-system' of the buffer associated with PROCESS | |
940 | will be bound to the value of the coding system used to decode | |
941 | the process output. | |
942 | ||
943 | This is useful when the coding system specified for the process buffer | |
944 | leaves either the character code conversion or the end-of-line conversion | |
945 | unspecified, or if the coding system used to decode the process output | |
946 | is more appropriate for saving the process buffer. | |
947 | ||
948 | Binding the variable `inherit-process-coding-system' to non-nil before | |
949 | starting the process is an alternative way of setting the inherit flag | |
950 | for the process which will run. */) | |
951 | (process, flag) | |
52a1b894 EZ |
952 | register Lisp_Object process, flag; |
953 | { | |
b7826503 | 954 | CHECK_PROCESS (process); |
aa91317a | 955 | XPROCESS (process)->inherit_coding_system_flag = flag; |
52a1b894 EZ |
956 | return flag; |
957 | } | |
958 | ||
959 | DEFUN ("process-inherit-coding-system-flag", | |
fdb82f93 PJ |
960 | Fprocess_inherit_coding_system_flag, Sprocess_inherit_coding_system_flag, |
961 | 1, 1, 0, | |
962 | doc: /* Return the value of inherit-coding-system flag for PROCESS. | |
963 | If this flag is t, `buffer-file-coding-system' of the buffer | |
964 | associated with PROCESS will inherit the coding system used to decode | |
965 | the process output. */) | |
966 | (process) | |
52a1b894 EZ |
967 | register Lisp_Object process; |
968 | { | |
b7826503 | 969 | CHECK_PROCESS (process); |
aa91317a | 970 | return XPROCESS (process)->inherit_coding_system_flag; |
52a1b894 EZ |
971 | } |
972 | ||
e690ca94 KS |
973 | DEFUN ("set-process-query-on-exit-flag", |
974 | Fset_process_query_on_exit_flag, Sset_process_query_on_exit_flag, | |
975 | 2, 2, 0, | |
976 | doc: /* Specify if query is needed for PROCESS when Emacs is exited. | |
977 | If the second argument FLAG is non-nil, emacs will query the user before | |
978 | exiting if PROCESS is running. */) | |
979 | (process, flag) | |
980 | register Lisp_Object process, flag; | |
d0d6b7c5 | 981 | { |
b7826503 | 982 | CHECK_PROCESS (process); |
e690ca94 KS |
983 | XPROCESS (process)->kill_without_query = Fnull (flag); |
984 | return flag; | |
d0d6b7c5 | 985 | } |
312c9964 | 986 | |
e690ca94 KS |
987 | DEFUN ("process-query-on-exit-flag", |
988 | Fprocess_query_on_exit_flag, Sprocess_query_on_exit_flag, | |
fdb82f93 | 989 | 1, 1, 0, |
e690ca94 | 990 | doc: /* Return the current value of query on exit flag for PROCESS. */) |
fdb82f93 | 991 | (process) |
de282a05 RS |
992 | register Lisp_Object process; |
993 | { | |
b7826503 | 994 | CHECK_PROCESS (process); |
e690ca94 KS |
995 | return Fnull (XPROCESS (process)->kill_without_query); |
996 | } | |
997 | ||
998 | #ifdef DATAGRAM_SOCKETS | |
999 | Lisp_Object Fprocess_datagram_address (); | |
1000 | #endif | |
1001 | ||
1002 | DEFUN ("process-contact", Fprocess_contact, Sprocess_contact, | |
1003 | 1, 2, 0, | |
1004 | doc: /* Return the contact info of PROCESS; t for a real child. | |
1005 | For a net connection, the value depends on the optional KEY arg. | |
1006 | If KEY is nil, value is a cons cell of the form (HOST SERVICE), | |
1007 | if KEY is t, the complete contact information for the connection is | |
1008 | returned, else the specific value for the keyword KEY is returned. | |
1009 | See `make-network-process' for a list of keywords. */) | |
1010 | (process, key) | |
1011 | register Lisp_Object process, key; | |
1012 | { | |
1013 | Lisp_Object contact; | |
1014 | ||
1015 | CHECK_PROCESS (process); | |
1016 | contact = XPROCESS (process)->childp; | |
1017 | ||
1018 | #ifdef DATAGRAM_SOCKETS | |
1019 | if (DATAGRAM_CONN_P (process) | |
1020 | && (EQ (key, Qt) || EQ (key, QCremote))) | |
1021 | contact = Fplist_put (contact, QCremote, | |
1022 | Fprocess_datagram_address (process)); | |
1023 | #endif | |
1024 | ||
1025 | if (!NETCONN_P (process) || EQ (key, Qt)) | |
1026 | return contact; | |
1027 | if (NILP (key)) | |
1028 | return Fcons (Fplist_get (contact, QChost), | |
1029 | Fcons (Fplist_get (contact, QCservice), Qnil)); | |
1030 | return Fplist_get (contact, key); | |
de282a05 RS |
1031 | } |
1032 | ||
312c9964 RS |
1033 | #if 0 /* Turned off because we don't currently record this info |
1034 | in the process. Perhaps add it. */ | |
1035 | DEFUN ("process-connection", Fprocess_connection, Sprocess_connection, 1, 1, 0, | |
fdb82f93 PJ |
1036 | doc: /* Return the connection type of PROCESS. |
1037 | The value is nil for a pipe, t or `pty' for a pty, or `stream' for | |
1038 | a socket connection. */) | |
1039 | (process) | |
312c9964 RS |
1040 | Lisp_Object process; |
1041 | { | |
1042 | return XPROCESS (process)->type; | |
1043 | } | |
1044 | #endif | |
d0d6b7c5 JB |
1045 | \f |
1046 | Lisp_Object | |
e690ca94 KS |
1047 | list_processes_1 (query_only) |
1048 | Lisp_Object query_only; | |
d0d6b7c5 JB |
1049 | { |
1050 | register Lisp_Object tail, tem; | |
1051 | Lisp_Object proc, minspace, tem1; | |
d0d6b7c5 | 1052 | register struct Lisp_Process *p; |
e690ca94 KS |
1053 | char tembuf[300]; |
1054 | int w_proc, w_buffer, w_tty; | |
1055 | Lisp_Object i_status, i_buffer, i_tty, i_command; | |
1056 | ||
1057 | w_proc = 4; /* Proc */ | |
1058 | w_buffer = 6; /* Buffer */ | |
1059 | w_tty = 0; /* Omit if no ttys */ | |
1060 | ||
1061 | for (tail = Vprocess_alist; !NILP (tail); tail = Fcdr (tail)) | |
1062 | { | |
1063 | int i; | |
1064 | ||
1065 | proc = Fcdr (Fcar (tail)); | |
1066 | p = XPROCESS (proc); | |
1067 | if (NILP (p->childp)) | |
1068 | continue; | |
1069 | if (!NILP (query_only) && !NILP (p->kill_without_query)) | |
1070 | continue; | |
1071 | if (STRINGP (p->name) | |
1072 | && ( i = XSTRING (p->name)->size, (i > w_proc))) | |
1073 | w_proc = i; | |
1074 | if (!NILP (p->buffer)) | |
1075 | { | |
1076 | if (NILP (XBUFFER (p->buffer)->name) && w_buffer < 8) | |
1077 | w_buffer = 8; /* (Killed) */ | |
1078 | else if ((i = XSTRING (XBUFFER (p->buffer)->name)->size, (i > w_buffer))) | |
1079 | w_buffer = i; | |
1080 | } | |
1081 | if (STRINGP (p->tty_name) | |
1082 | && (i = XSTRING (p->tty_name)->size, (i > w_tty))) | |
1083 | w_tty = i; | |
1084 | } | |
1085 | ||
1086 | XSETFASTINT (i_status, w_proc + 1); | |
1087 | XSETFASTINT (i_buffer, XFASTINT (i_status) + 9); | |
1088 | if (w_tty) | |
1089 | { | |
1090 | XSETFASTINT (i_tty, XFASTINT (i_buffer) + w_buffer + 1); | |
1091 | XSETFASTINT (i_command, XFASTINT (i_buffer) + w_tty + 1); | |
1092 | } else { | |
1093 | i_tty = Qnil; | |
1094 | XSETFASTINT (i_command, XFASTINT (i_buffer) + w_buffer + 1); | |
1095 | } | |
d0d6b7c5 | 1096 | |
22719df2 | 1097 | XSETFASTINT (minspace, 1); |
d0d6b7c5 JB |
1098 | |
1099 | set_buffer_internal (XBUFFER (Vstandard_output)); | |
1100 | Fbuffer_disable_undo (Vstandard_output); | |
1101 | ||
1102 | current_buffer->truncate_lines = Qt; | |
1103 | ||
e690ca94 KS |
1104 | write_string ("Proc", -1); |
1105 | Findent_to (i_status, minspace); write_string ("Status", -1); | |
1106 | Findent_to (i_buffer, minspace); write_string ("Buffer", -1); | |
1107 | if (!NILP (i_tty)) | |
1108 | { | |
1109 | Findent_to (i_tty, minspace); write_string ("Tty", -1); | |
1110 | } | |
1111 | Findent_to (i_command, minspace); write_string ("Command", -1); | |
1112 | write_string ("\n", -1); | |
1113 | ||
1114 | write_string ("----", -1); | |
1115 | Findent_to (i_status, minspace); write_string ("------", -1); | |
1116 | Findent_to (i_buffer, minspace); write_string ("------", -1); | |
1117 | if (!NILP (i_tty)) | |
1118 | { | |
1119 | Findent_to (i_tty, minspace); write_string ("---", -1); | |
1120 | } | |
1121 | Findent_to (i_command, minspace); write_string ("-------", -1); | |
1122 | write_string ("\n", -1); | |
d0d6b7c5 JB |
1123 | |
1124 | for (tail = Vprocess_alist; !NILP (tail); tail = Fcdr (tail)) | |
1125 | { | |
1126 | Lisp_Object symbol; | |
1127 | ||
1128 | proc = Fcdr (Fcar (tail)); | |
1129 | p = XPROCESS (proc); | |
1130 | if (NILP (p->childp)) | |
1131 | continue; | |
e690ca94 KS |
1132 | if (!NILP (query_only) && !NILP (p->kill_without_query)) |
1133 | continue; | |
d0d6b7c5 JB |
1134 | |
1135 | Finsert (1, &p->name); | |
e690ca94 | 1136 | Findent_to (i_status, minspace); |
d0d6b7c5 JB |
1137 | |
1138 | if (!NILP (p->raw_status_low)) | |
1139 | update_status (p); | |
1140 | symbol = p->status; | |
bcd69aea | 1141 | if (CONSP (p->status)) |
70949dac | 1142 | symbol = XCAR (p->status); |
d0d6b7c5 JB |
1143 | |
1144 | ||
1145 | if (EQ (symbol, Qsignal)) | |
1146 | { | |
1147 | Lisp_Object tem; | |
1148 | tem = Fcar (Fcdr (p->status)); | |
1149 | #ifdef VMS | |
1150 | if (XINT (tem) < NSIG) | |
b0310da4 | 1151 | write_string (sys_errlist [XINT (tem)], -1); |
d0d6b7c5 JB |
1152 | else |
1153 | #endif | |
1154 | Fprinc (symbol, Qnil); | |
1155 | } | |
e690ca94 | 1156 | else if (NETCONN1_P (p)) |
d0d6b7c5 | 1157 | { |
e690ca94 | 1158 | if (EQ (symbol, Qexit)) |
d0d6b7c5 | 1159 | write_string ("closed", -1); |
e690ca94 KS |
1160 | else if (EQ (p->command, Qt)) |
1161 | write_string ("stopped", -1); | |
1162 | else if (EQ (symbol, Qrun)) | |
1163 | write_string ("open", -1); | |
d0d6b7c5 JB |
1164 | else |
1165 | Fprinc (symbol, Qnil); | |
1166 | } | |
1167 | else | |
1168 | Fprinc (symbol, Qnil); | |
1169 | ||
1170 | if (EQ (symbol, Qexit)) | |
1171 | { | |
1172 | Lisp_Object tem; | |
1173 | tem = Fcar (Fcdr (p->status)); | |
1174 | if (XFASTINT (tem)) | |
1175 | { | |
3162bafa | 1176 | sprintf (tembuf, " %d", (int) XFASTINT (tem)); |
d0d6b7c5 JB |
1177 | write_string (tembuf, -1); |
1178 | } | |
1179 | } | |
1180 | ||
1181 | if (EQ (symbol, Qsignal) || EQ (symbol, Qexit)) | |
1182 | remove_process (proc); | |
1183 | ||
e690ca94 | 1184 | Findent_to (i_buffer, minspace); |
d0d6b7c5 JB |
1185 | if (NILP (p->buffer)) |
1186 | insert_string ("(none)"); | |
1187 | else if (NILP (XBUFFER (p->buffer)->name)) | |
1188 | insert_string ("(Killed)"); | |
1189 | else | |
1190 | Finsert (1, &XBUFFER (p->buffer)->name); | |
1191 | ||
e690ca94 KS |
1192 | if (!NILP (i_tty)) |
1193 | { | |
1194 | Findent_to (i_tty, minspace); | |
1195 | if (STRINGP (p->tty_name)) | |
1196 | Finsert (1, &p->tty_name); | |
1197 | } | |
a9fde32e | 1198 | |
e690ca94 | 1199 | Findent_to (i_command, minspace); |
a9fde32e | 1200 | |
e690ca94 KS |
1201 | if (EQ (p->status, Qlisten)) |
1202 | { | |
1203 | Lisp_Object port = Fplist_get (p->childp, QCservice); | |
1204 | if (INTEGERP (port)) | |
1205 | port = Fnumber_to_string (port); | |
1206 | sprintf (tembuf, "(network %s server on %s)\n", | |
1207 | (DATAGRAM_CHAN_P (p->infd) ? "datagram" : "stream"), | |
1208 | XSTRING (port)->data); | |
1209 | insert_string (tembuf); | |
1210 | } | |
1211 | else if (NETCONN1_P (p)) | |
d0d6b7c5 | 1212 | { |
e690ca94 KS |
1213 | /* For a local socket, there is no host name, |
1214 | so display service instead. */ | |
1215 | Lisp_Object host = Fplist_get (p->childp, QChost); | |
1216 | if (!STRINGP (host)) | |
1217 | { | |
1218 | host = Fplist_get (p->childp, QCservice); | |
1219 | if (INTEGERP (host)) | |
1220 | host = Fnumber_to_string (host); | |
1221 | } | |
1222 | sprintf (tembuf, "(network %s connection to %s)\n", | |
1223 | (DATAGRAM_CHAN_P (p->infd) ? "datagram" : "stream"), | |
1224 | XSTRING (host)->data); | |
d0d6b7c5 JB |
1225 | insert_string (tembuf); |
1226 | } | |
1227 | else | |
1228 | { | |
1229 | tem = p->command; | |
1230 | while (1) | |
1231 | { | |
1232 | tem1 = Fcar (tem); | |
1233 | Finsert (1, &tem1); | |
1234 | tem = Fcdr (tem); | |
1235 | if (NILP (tem)) | |
1236 | break; | |
1237 | insert_string (" "); | |
1238 | } | |
1239 | insert_string ("\n"); | |
1240 | } | |
1241 | } | |
1242 | return Qnil; | |
1243 | } | |
1244 | ||
e690ca94 | 1245 | DEFUN ("list-processes", Flist_processes, Slist_processes, 0, 1, "P", |
fdb82f93 | 1246 | doc: /* Display a list of all processes. |
e690ca94 KS |
1247 | If optional argument QUERY-ONLY is non-nil, only processes with |
1248 | the query-on-exit flag set will be listed. | |
fdb82f93 PJ |
1249 | Any process listed as exited or signaled is actually eliminated |
1250 | after the listing is made. */) | |
e690ca94 KS |
1251 | (query_only) |
1252 | Lisp_Object query_only; | |
d0d6b7c5 JB |
1253 | { |
1254 | internal_with_output_to_temp_buffer ("*Process List*", | |
e690ca94 | 1255 | list_processes_1, query_only); |
d0d6b7c5 JB |
1256 | return Qnil; |
1257 | } | |
1258 | ||
1259 | DEFUN ("process-list", Fprocess_list, Sprocess_list, 0, 0, 0, | |
fdb82f93 PJ |
1260 | doc: /* Return a list of all processes. */) |
1261 | () | |
d0d6b7c5 JB |
1262 | { |
1263 | return Fmapcar (Qcdr, Vprocess_alist); | |
1264 | } | |
1265 | \f | |
b0310da4 JB |
1266 | /* Starting asynchronous inferior processes. */ |
1267 | ||
1268 | static Lisp_Object start_process_unwind (); | |
1269 | ||
d0d6b7c5 | 1270 | DEFUN ("start-process", Fstart_process, Sstart_process, 3, MANY, 0, |
fdb82f93 PJ |
1271 | doc: /* Start a program in a subprocess. Return the process object for it. |
1272 | NAME is name for process. It is modified if necessary to make it unique. | |
1273 | BUFFER is the buffer or (buffer-name) to associate with the process. | |
1274 | Process output goes at end of that buffer, unless you specify | |
1275 | an output stream or filter function to handle the output. | |
1276 | BUFFER may be also nil, meaning that this process is not associated | |
1277 | with any buffer. | |
1278 | Third arg is program file name. It is searched for in PATH. | |
3ecdf100 PJ |
1279 | Remaining arguments are strings to give program as arguments. |
1280 | usage: (start-process NAME BUFFER PROGRAM &rest PROGRAM-ARGS) */) | |
fdb82f93 | 1281 | (nargs, args) |
d0d6b7c5 JB |
1282 | int nargs; |
1283 | register Lisp_Object *args; | |
1284 | { | |
1e30af70 | 1285 | Lisp_Object buffer, name, program, proc, current_dir, tem; |
d0d6b7c5 JB |
1286 | #ifdef VMS |
1287 | register unsigned char *new_argv; | |
1288 | int len; | |
1289 | #else | |
1290 | register unsigned char **new_argv; | |
1291 | #endif | |
1292 | register int i; | |
b0310da4 | 1293 | int count = specpdl_ptr - specpdl; |
d0d6b7c5 JB |
1294 | |
1295 | buffer = args[1]; | |
1296 | if (!NILP (buffer)) | |
1297 | buffer = Fget_buffer_create (buffer); | |
1298 | ||
1e30af70 JB |
1299 | /* Make sure that the child will be able to chdir to the current |
1300 | buffer's current directory, or its unhandled equivalent. We | |
1301 | can't just have the child check for an error when it does the | |
1302 | chdir, since it's in a vfork. | |
1303 | ||
1304 | We have to GCPRO around this because Fexpand_file_name and | |
1305 | Funhandled_file_name_directory might call a file name handling | |
1306 | function. The argument list is protected by the caller, so all | |
1307 | we really have to worry about is buffer. */ | |
1308 | { | |
1309 | struct gcpro gcpro1, gcpro2; | |
1310 | ||
1311 | current_dir = current_buffer->directory; | |
1312 | ||
1313 | GCPRO2 (buffer, current_dir); | |
1314 | ||
7af71e17 RS |
1315 | current_dir |
1316 | = expand_and_dir_to_file (Funhandled_file_name_directory (current_dir), | |
1317 | Qnil); | |
1e30af70 JB |
1318 | if (NILP (Ffile_accessible_directory_p (current_dir))) |
1319 | report_file_error ("Setting current directory", | |
1320 | Fcons (current_buffer->directory, Qnil)); | |
1321 | ||
1322 | UNGCPRO; | |
1323 | } | |
1324 | ||
d0d6b7c5 | 1325 | name = args[0]; |
b7826503 | 1326 | CHECK_STRING (name); |
d0d6b7c5 JB |
1327 | |
1328 | program = args[2]; | |
1329 | ||
b7826503 | 1330 | CHECK_STRING (program); |
d0d6b7c5 | 1331 | |
d0d6b7c5 | 1332 | proc = make_process (name); |
b0310da4 JB |
1333 | /* If an error occurs and we can't start the process, we want to |
1334 | remove it from the process list. This means that each error | |
1335 | check in create_process doesn't need to call remove_process | |
1336 | itself; it's all taken care of here. */ | |
1337 | record_unwind_protect (start_process_unwind, proc); | |
d0d6b7c5 JB |
1338 | |
1339 | XPROCESS (proc)->childp = Qt; | |
1340 | XPROCESS (proc)->command_channel_p = Qnil; | |
1341 | XPROCESS (proc)->buffer = buffer; | |
1342 | XPROCESS (proc)->sentinel = Qnil; | |
1343 | XPROCESS (proc)->filter = Qnil; | |
1344 | XPROCESS (proc)->command = Flist (nargs - 2, args + 2); | |
1345 | ||
7af71e17 RS |
1346 | /* Make the process marker point into the process buffer (if any). */ |
1347 | if (!NILP (buffer)) | |
d8a2934e RS |
1348 | set_marker_both (XPROCESS (proc)->mark, buffer, |
1349 | BUF_ZV (XBUFFER (buffer)), | |
1350 | BUF_ZV_BYTE (XBUFFER (buffer))); | |
7af71e17 | 1351 | |
67918941 | 1352 | { |
d5d4ae71 KH |
1353 | /* Decide coding systems for communicating with the process. Here |
1354 | we don't setup the structure coding_system nor pay attention to | |
1355 | unibyte mode. They are done in create_process. */ | |
1356 | ||
67918941 RS |
1357 | /* Qt denotes we have not yet called Ffind_operation_coding_system. */ |
1358 | Lisp_Object coding_systems = Qt; | |
1359 | Lisp_Object val, *args2; | |
a4a37e65 | 1360 | struct gcpro gcpro1, gcpro2; |
67918941 | 1361 | |
d5d4ae71 KH |
1362 | val = Vcoding_system_for_read; |
1363 | if (NILP (val)) | |
67918941 RS |
1364 | { |
1365 | args2 = (Lisp_Object *) alloca ((nargs + 1) * sizeof *args2); | |
1366 | args2[0] = Qstart_process; | |
1367 | for (i = 0; i < nargs; i++) args2[i + 1] = args[i]; | |
a4a37e65 | 1368 | GCPRO2 (proc, current_dir); |
67918941 RS |
1369 | coding_systems = Ffind_operation_coding_system (nargs + 1, args2); |
1370 | UNGCPRO; | |
1371 | if (CONSP (coding_systems)) | |
70949dac | 1372 | val = XCAR (coding_systems); |
67918941 | 1373 | else if (CONSP (Vdefault_process_coding_system)) |
70949dac | 1374 | val = XCAR (Vdefault_process_coding_system); |
67918941 RS |
1375 | } |
1376 | XPROCESS (proc)->decode_coding_system = val; | |
1377 | ||
d5d4ae71 KH |
1378 | val = Vcoding_system_for_write; |
1379 | if (NILP (val)) | |
67918941 RS |
1380 | { |
1381 | if (EQ (coding_systems, Qt)) | |
1382 | { | |
1383 | args2 = (Lisp_Object *) alloca ((nargs + 1) * sizeof args2); | |
1384 | args2[0] = Qstart_process; | |
1385 | for (i = 0; i < nargs; i++) args2[i + 1] = args[i]; | |
a4a37e65 | 1386 | GCPRO2 (proc, current_dir); |
67918941 RS |
1387 | coding_systems = Ffind_operation_coding_system (nargs + 1, args2); |
1388 | UNGCPRO; | |
1389 | } | |
1390 | if (CONSP (coding_systems)) | |
70949dac | 1391 | val = XCDR (coding_systems); |
67918941 | 1392 | else if (CONSP (Vdefault_process_coding_system)) |
70949dac | 1393 | val = XCDR (Vdefault_process_coding_system); |
67918941 RS |
1394 | } |
1395 | XPROCESS (proc)->encode_coding_system = val; | |
1396 | } | |
0fa1789e | 1397 | |
a4a37e65 KH |
1398 | #ifdef VMS |
1399 | /* Make a one member argv with all args concatenated | |
1400 | together separated by a blank. */ | |
1401 | len = STRING_BYTES (XSTRING (program)) + 2; | |
1402 | for (i = 3; i < nargs; i++) | |
1403 | { | |
1404 | tem = args[i]; | |
b7826503 | 1405 | CHECK_STRING (tem); |
a4a37e65 KH |
1406 | len += STRING_BYTES (XSTRING (tem)) + 1; /* count the blank */ |
1407 | } | |
1408 | new_argv = (unsigned char *) alloca (len); | |
1409 | strcpy (new_argv, XSTRING (program)->data); | |
1410 | for (i = 3; i < nargs; i++) | |
1411 | { | |
1412 | tem = args[i]; | |
b7826503 | 1413 | CHECK_STRING (tem); |
a4a37e65 KH |
1414 | strcat (new_argv, " "); |
1415 | strcat (new_argv, XSTRING (tem)->data); | |
1416 | } | |
1417 | /* Need to add code here to check for program existence on VMS */ | |
1418 | ||
1419 | #else /* not VMS */ | |
1420 | new_argv = (unsigned char **) alloca ((nargs - 1) * sizeof (char *)); | |
1421 | ||
1422 | /* If program file name is not absolute, search our path for it */ | |
1423 | if (!IS_DIRECTORY_SEP (XSTRING (program)->data[0]) | |
1424 | && !(XSTRING (program)->size > 1 | |
1425 | && IS_DEVICE_SEP (XSTRING (program)->data[1]))) | |
1426 | { | |
1427 | struct gcpro gcpro1, gcpro2, gcpro3, gcpro4; | |
1428 | ||
1429 | tem = Qnil; | |
1430 | GCPRO4 (name, program, buffer, current_dir); | |
c0ec53ad | 1431 | openp (Vexec_path, program, Vexec_suffixes, &tem, 1); |
a4a37e65 KH |
1432 | UNGCPRO; |
1433 | if (NILP (tem)) | |
1434 | report_file_error ("Searching for program", Fcons (program, Qnil)); | |
1435 | tem = Fexpand_file_name (tem, Qnil); | |
1436 | tem = ENCODE_FILE (tem); | |
1437 | new_argv[0] = XSTRING (tem)->data; | |
1438 | } | |
1439 | else | |
1440 | { | |
1441 | if (!NILP (Ffile_directory_p (program))) | |
1442 | error ("Specified program for new process is a directory"); | |
1443 | ||
1444 | tem = ENCODE_FILE (program); | |
1445 | new_argv[0] = XSTRING (tem)->data; | |
1446 | } | |
1447 | ||
1448 | /* Here we encode arguments by the coding system used for sending | |
1449 | data to the process. We don't support using different coding | |
1450 | systems for encoding arguments and for encoding data sent to the | |
1451 | process. */ | |
1452 | ||
1453 | for (i = 3; i < nargs; i++) | |
1454 | { | |
1455 | tem = args[i]; | |
b7826503 | 1456 | CHECK_STRING (tem); |
a4a37e65 KH |
1457 | if (STRING_MULTIBYTE (tem)) |
1458 | tem = (code_convert_string_norecord | |
1459 | (tem, XPROCESS (proc)->encode_coding_system, 1)); | |
1460 | new_argv[i - 2] = XSTRING (tem)->data; | |
1461 | } | |
1462 | new_argv[i - 2] = 0; | |
1463 | #endif /* not VMS */ | |
1464 | ||
0fa1789e | 1465 | XPROCESS (proc)->decoding_buf = make_uninit_string (0); |
e7fbaa65 | 1466 | XPROCESS (proc)->decoding_carryover = make_number (0); |
0fa1789e | 1467 | XPROCESS (proc)->encoding_buf = make_uninit_string (0); |
e7fbaa65 | 1468 | XPROCESS (proc)->encoding_carryover = make_number (0); |
0fa1789e | 1469 | |
52a1b894 | 1470 | XPROCESS (proc)->inherit_coding_system_flag |
aa91317a RS |
1471 | = (NILP (buffer) || !inherit_process_coding_system |
1472 | ? Qnil : Qt); | |
52a1b894 | 1473 | |
6b53bb85 | 1474 | create_process (proc, (char **) new_argv, current_dir); |
d0d6b7c5 | 1475 | |
b0310da4 | 1476 | return unbind_to (count, proc); |
d0d6b7c5 JB |
1477 | } |
1478 | ||
b0310da4 | 1479 | /* This function is the unwind_protect form for Fstart_process. If |
8e6208c5 | 1480 | PROC doesn't have its pid set, then we know someone has signaled |
b0310da4 JB |
1481 | an error and the process wasn't started successfully, so we should |
1482 | remove it from the process list. */ | |
1483 | static Lisp_Object | |
1484 | start_process_unwind (proc) | |
1485 | Lisp_Object proc; | |
1486 | { | |
bcd69aea | 1487 | if (!PROCESSP (proc)) |
b0310da4 JB |
1488 | abort (); |
1489 | ||
1490 | /* Was PROC started successfully? */ | |
188d6c4e | 1491 | if (XINT (XPROCESS (proc)->pid) <= 0) |
b0310da4 JB |
1492 | remove_process (proc); |
1493 | ||
1494 | return Qnil; | |
1495 | } | |
1496 | ||
30904ab7 GM |
1497 | void |
1498 | create_process_1 (timer) | |
1499 | struct atimer *timer; | |
d0d6b7c5 | 1500 | { |
30904ab7 | 1501 | /* Nothing to do. */ |
d0d6b7c5 JB |
1502 | } |
1503 | ||
30904ab7 | 1504 | |
d0d6b7c5 JB |
1505 | #if 0 /* This doesn't work; see the note before sigchld_handler. */ |
1506 | #ifdef USG | |
1507 | #ifdef SIGCHLD | |
1508 | /* Mimic blocking of signals on system V, which doesn't really have it. */ | |
1509 | ||
1510 | /* Nonzero means we got a SIGCHLD when it was supposed to be blocked. */ | |
1511 | int sigchld_deferred; | |
1512 | ||
1513 | SIGTYPE | |
1514 | create_process_sigchld () | |
1515 | { | |
1516 | signal (SIGCHLD, create_process_sigchld); | |
1517 | ||
1518 | sigchld_deferred = 1; | |
1519 | } | |
1520 | #endif | |
1521 | #endif | |
1522 | #endif | |
1523 | ||
1524 | #ifndef VMS /* VMS version of this function is in vmsproc.c. */ | |
6b53bb85 | 1525 | void |
1e30af70 | 1526 | create_process (process, new_argv, current_dir) |
d0d6b7c5 JB |
1527 | Lisp_Object process; |
1528 | char **new_argv; | |
1e30af70 | 1529 | Lisp_Object current_dir; |
d0d6b7c5 | 1530 | { |
ecd1f654 | 1531 | int pid, inchannel, outchannel; |
d0d6b7c5 | 1532 | int sv[2]; |
0dc70c33 KH |
1533 | #ifdef POSIX_SIGNALS |
1534 | sigset_t procmask; | |
1535 | sigset_t blocked; | |
1536 | struct sigaction sigint_action; | |
1537 | struct sigaction sigquit_action; | |
1538 | #ifdef AIX | |
1539 | struct sigaction sighup_action; | |
1540 | #endif | |
1541 | #else /* !POSIX_SIGNALS */ | |
41d03b9a | 1542 | #if 0 |
d0d6b7c5 JB |
1543 | #ifdef SIGCHLD |
1544 | SIGTYPE (*sigchld)(); | |
1545 | #endif | |
41d03b9a | 1546 | #endif /* 0 */ |
0dc70c33 | 1547 | #endif /* !POSIX_SIGNALS */ |
ecd1f654 KH |
1548 | /* Use volatile to protect variables from being clobbered by longjmp. */ |
1549 | volatile int forkin, forkout; | |
1550 | volatile int pty_flag = 0; | |
3ec68006 | 1551 | #ifndef USE_CRT_DLL |
d0d6b7c5 | 1552 | extern char **environ; |
3ec68006 | 1553 | #endif |
d0d6b7c5 | 1554 | |
d0d6b7c5 JB |
1555 | inchannel = outchannel = -1; |
1556 | ||
1557 | #ifdef HAVE_PTYS | |
fe45da4e | 1558 | if (!NILP (Vprocess_connection_type)) |
d0d6b7c5 JB |
1559 | outchannel = inchannel = allocate_pty (); |
1560 | ||
d0d6b7c5 JB |
1561 | if (inchannel >= 0) |
1562 | { | |
1563 | #ifndef USG | |
1564 | /* On USG systems it does not work to open the pty's tty here | |
1565 | and then close and reopen it in the child. */ | |
1566 | #ifdef O_NOCTTY | |
1567 | /* Don't let this terminal become our controlling terminal | |
1568 | (in case we don't have one). */ | |
68c45bf0 | 1569 | forkout = forkin = emacs_open (pty_name, O_RDWR | O_NOCTTY, 0); |
d0d6b7c5 | 1570 | #else |
68c45bf0 | 1571 | forkout = forkin = emacs_open (pty_name, O_RDWR, 0); |
d0d6b7c5 JB |
1572 | #endif |
1573 | if (forkin < 0) | |
1574 | report_file_error ("Opening pty", Qnil); | |
1575 | #else | |
1576 | forkin = forkout = -1; | |
1577 | #endif /* not USG */ | |
1578 | pty_flag = 1; | |
1579 | } | |
1580 | else | |
1581 | #endif /* HAVE_PTYS */ | |
1582 | #ifdef SKTPAIR | |
1583 | { | |
1584 | if (socketpair (AF_UNIX, SOCK_STREAM, 0, sv) < 0) | |
1585 | report_file_error ("Opening socketpair", Qnil); | |
1586 | outchannel = inchannel = sv[0]; | |
1587 | forkout = forkin = sv[1]; | |
1588 | } | |
1589 | #else /* not SKTPAIR */ | |
1590 | { | |
fc14013c KH |
1591 | int tem; |
1592 | tem = pipe (sv); | |
1593 | if (tem < 0) | |
1594 | report_file_error ("Creating pipe", Qnil); | |
d0d6b7c5 JB |
1595 | inchannel = sv[0]; |
1596 | forkout = sv[1]; | |
fc14013c KH |
1597 | tem = pipe (sv); |
1598 | if (tem < 0) | |
1599 | { | |
68c45bf0 PE |
1600 | emacs_close (inchannel); |
1601 | emacs_close (forkout); | |
fc14013c KH |
1602 | report_file_error ("Creating pipe", Qnil); |
1603 | } | |
d0d6b7c5 JB |
1604 | outchannel = sv[1]; |
1605 | forkin = sv[0]; | |
1606 | } | |
1607 | #endif /* not SKTPAIR */ | |
1608 | ||
1609 | #if 0 | |
1610 | /* Replaced by close_process_descs */ | |
1611 | set_exclusive_use (inchannel); | |
1612 | set_exclusive_use (outchannel); | |
1613 | #endif | |
1614 | ||
1615 | /* Stride people say it's a mystery why this is needed | |
1616 | as well as the O_NDELAY, but that it fails without this. */ | |
1617 | #if defined (STRIDE) || (defined (pfa) && defined (HAVE_PTYS)) | |
1618 | { | |
1619 | int one = 1; | |
1620 | ioctl (inchannel, FIONBIO, &one); | |
1621 | } | |
1622 | #endif | |
1623 | ||
1624 | #ifdef O_NONBLOCK | |
1625 | fcntl (inchannel, F_SETFL, O_NONBLOCK); | |
03832893 | 1626 | fcntl (outchannel, F_SETFL, O_NONBLOCK); |
d0d6b7c5 JB |
1627 | #else |
1628 | #ifdef O_NDELAY | |
1629 | fcntl (inchannel, F_SETFL, O_NDELAY); | |
03832893 | 1630 | fcntl (outchannel, F_SETFL, O_NDELAY); |
d0d6b7c5 JB |
1631 | #endif |
1632 | #endif | |
1633 | ||
1634 | /* Record this as an active process, with its channels. | |
1635 | As a result, child_setup will close Emacs's side of the pipes. */ | |
1636 | chan_process[inchannel] = process; | |
1d056e64 KH |
1637 | XSETINT (XPROCESS (process)->infd, inchannel); |
1638 | XSETINT (XPROCESS (process)->outfd, outchannel); | |
d0d6b7c5 JB |
1639 | /* Record the tty descriptor used in the subprocess. */ |
1640 | if (forkin < 0) | |
1641 | XPROCESS (process)->subtty = Qnil; | |
1642 | else | |
22719df2 | 1643 | XSETFASTINT (XPROCESS (process)->subtty, forkin); |
d0d6b7c5 JB |
1644 | XPROCESS (process)->pty_flag = (pty_flag ? Qt : Qnil); |
1645 | XPROCESS (process)->status = Qrun; | |
c7580538 KH |
1646 | if (!proc_decode_coding_system[inchannel]) |
1647 | proc_decode_coding_system[inchannel] | |
1648 | = (struct coding_system *) xmalloc (sizeof (struct coding_system)); | |
0fa1789e | 1649 | setup_coding_system (XPROCESS (process)->decode_coding_system, |
c7580538 KH |
1650 | proc_decode_coding_system[inchannel]); |
1651 | if (!proc_encode_coding_system[outchannel]) | |
929a6726 RS |
1652 | proc_encode_coding_system[outchannel] |
1653 | = (struct coding_system *) xmalloc (sizeof (struct coding_system)); | |
0fa1789e | 1654 | setup_coding_system (XPROCESS (process)->encode_coding_system, |
c7580538 | 1655 | proc_encode_coding_system[outchannel]); |
d0d6b7c5 JB |
1656 | |
1657 | /* Delay interrupts until we have a chance to store | |
1658 | the new fork's pid in its process structure */ | |
0dc70c33 KH |
1659 | #ifdef POSIX_SIGNALS |
1660 | sigemptyset (&blocked); | |
1661 | #ifdef SIGCHLD | |
1662 | sigaddset (&blocked, SIGCHLD); | |
1663 | #endif | |
351e611f | 1664 | #ifdef HAVE_WORKING_VFORK |
0dc70c33 KH |
1665 | /* On many hosts (e.g. Solaris 2.4), if a vforked child calls `signal', |
1666 | this sets the parent's signal handlers as well as the child's. | |
1667 | So delay all interrupts whose handlers the child might munge, | |
1668 | and record the current handlers so they can be restored later. */ | |
1669 | sigaddset (&blocked, SIGINT ); sigaction (SIGINT , 0, &sigint_action ); | |
1670 | sigaddset (&blocked, SIGQUIT); sigaction (SIGQUIT, 0, &sigquit_action); | |
1671 | #ifdef AIX | |
1672 | sigaddset (&blocked, SIGHUP ); sigaction (SIGHUP , 0, &sighup_action ); | |
1673 | #endif | |
351e611f | 1674 | #endif /* HAVE_WORKING_VFORK */ |
0dc70c33 KH |
1675 | sigprocmask (SIG_BLOCK, &blocked, &procmask); |
1676 | #else /* !POSIX_SIGNALS */ | |
d0d6b7c5 JB |
1677 | #ifdef SIGCHLD |
1678 | #ifdef BSD4_1 | |
1679 | sighold (SIGCHLD); | |
1680 | #else /* not BSD4_1 */ | |
6df54671 | 1681 | #if defined (BSD_SYSTEM) || defined (UNIPLUS) || defined (HPUX) |
d0d6b7c5 JB |
1682 | sigsetmask (sigmask (SIGCHLD)); |
1683 | #else /* ordinary USG */ | |
1684 | #if 0 | |
1685 | sigchld_deferred = 0; | |
1686 | sigchld = signal (SIGCHLD, create_process_sigchld); | |
1687 | #endif | |
1688 | #endif /* ordinary USG */ | |
1689 | #endif /* not BSD4_1 */ | |
1690 | #endif /* SIGCHLD */ | |
0dc70c33 | 1691 | #endif /* !POSIX_SIGNALS */ |
d0d6b7c5 | 1692 | |
3081bf8d | 1693 | FD_SET (inchannel, &input_wait_mask); |
a69281ff | 1694 | FD_SET (inchannel, &non_keyboard_wait_mask); |
3081bf8d KH |
1695 | if (inchannel > max_process_desc) |
1696 | max_process_desc = inchannel; | |
1697 | ||
d0d6b7c5 JB |
1698 | /* Until we store the proper pid, enable sigchld_handler |
1699 | to recognize an unknown pid as standing for this process. | |
1700 | It is very important not to let this `marker' value stay | |
1701 | in the table after this function has returned; if it does | |
1702 | it might cause call-process to hang and subsequent asynchronous | |
1703 | processes to get their return values scrambled. */ | |
1704 | XSETINT (XPROCESS (process)->pid, -1); | |
1705 | ||
ececcbec RS |
1706 | BLOCK_INPUT; |
1707 | ||
d0d6b7c5 JB |
1708 | { |
1709 | /* child_setup must clobber environ on systems with true vfork. | |
1710 | Protect it from permanent change. */ | |
1711 | char **save_environ = environ; | |
1712 | ||
14dc6093 | 1713 | current_dir = ENCODE_FILE (current_dir); |
a932f187 | 1714 | |
e98d950b | 1715 | #ifndef WINDOWSNT |
d0d6b7c5 JB |
1716 | pid = vfork (); |
1717 | if (pid == 0) | |
e98d950b | 1718 | #endif /* not WINDOWSNT */ |
d0d6b7c5 JB |
1719 | { |
1720 | int xforkin = forkin; | |
1721 | int xforkout = forkout; | |
1722 | ||
1723 | #if 0 /* This was probably a mistake--it duplicates code later on, | |
1724 | but fails to handle all the cases. */ | |
1725 | /* Make sure SIGCHLD is not blocked in the child. */ | |
1726 | sigsetmask (SIGEMPTYMASK); | |
1727 | #endif | |
1728 | ||
1729 | /* Make the pty be the controlling terminal of the process. */ | |
1730 | #ifdef HAVE_PTYS | |
1731 | /* First, disconnect its current controlling terminal. */ | |
1732 | #ifdef HAVE_SETSID | |
7ce48618 RS |
1733 | /* We tried doing setsid only if pty_flag, but it caused |
1734 | process_set_signal to fail on SGI when using a pipe. */ | |
1735 | setsid (); | |
ce4c9c90 | 1736 | /* Make the pty's terminal the controlling terminal. */ |
084fd64a | 1737 | if (pty_flag) |
39e9ebcd | 1738 | { |
39e9ebcd RS |
1739 | #ifdef TIOCSCTTY |
1740 | /* We ignore the return value | |
1741 | because faith@cs.unc.edu says that is necessary on Linux. */ | |
1742 | ioctl (xforkin, TIOCSCTTY, 0); | |
ce4c9c90 | 1743 | #endif |
39e9ebcd | 1744 | } |
d0d6b7c5 | 1745 | #else /* not HAVE_SETSID */ |
c14e53a4 | 1746 | #ifdef USG |
000ab717 | 1747 | /* It's very important to call setpgrp here and no time |
d0d6b7c5 JB |
1748 | afterwards. Otherwise, we lose our controlling tty which |
1749 | is set when we open the pty. */ | |
1750 | setpgrp (); | |
1751 | #endif /* USG */ | |
1752 | #endif /* not HAVE_SETSID */ | |
9bcf8ec6 KH |
1753 | #if defined (HAVE_TERMIOS) && defined (LDISC1) |
1754 | if (pty_flag && xforkin >= 0) | |
1755 | { | |
1756 | struct termios t; | |
1757 | tcgetattr (xforkin, &t); | |
1758 | t.c_lflag = LDISC1; | |
1759 | if (tcsetattr (xforkin, TCSANOW, &t) < 0) | |
68c45bf0 | 1760 | emacs_write (1, "create_process/tcsetattr LDISC1 failed\n", 39); |
9bcf8ec6 KH |
1761 | } |
1762 | #else | |
aafadd9f | 1763 | #if defined (NTTYDISC) && defined (TIOCSETD) |
ff773a4e | 1764 | if (pty_flag && xforkin >= 0) |
afc549fd RS |
1765 | { |
1766 | /* Use new line discipline. */ | |
1767 | int ldisc = NTTYDISC; | |
4458f555 | 1768 | ioctl (xforkin, TIOCSETD, &ldisc); |
afc549fd | 1769 | } |
000ab717 | 1770 | #endif |
9bcf8ec6 | 1771 | #endif |
d0d6b7c5 JB |
1772 | #ifdef TIOCNOTTY |
1773 | /* In 4.3BSD, the TIOCSPGRP bug has been fixed, and now you | |
1774 | can do TIOCSPGRP only to the process's controlling tty. */ | |
1775 | if (pty_flag) | |
1776 | { | |
1777 | /* I wonder: would just ioctl (0, TIOCNOTTY, 0) work here? | |
1778 | I can't test it since I don't have 4.3. */ | |
68c45bf0 | 1779 | int j = emacs_open ("/dev/tty", O_RDWR, 0); |
d0d6b7c5 | 1780 | ioctl (j, TIOCNOTTY, 0); |
68c45bf0 | 1781 | emacs_close (j); |
5a570e37 | 1782 | #ifndef USG |
d0d6b7c5 JB |
1783 | /* In order to get a controlling terminal on some versions |
1784 | of BSD, it is necessary to put the process in pgrp 0 | |
1785 | before it opens the terminal. */ | |
99c1aeca | 1786 | #ifdef HAVE_SETPGID |
3ea1d291 RS |
1787 | setpgid (0, 0); |
1788 | #else | |
d0d6b7c5 | 1789 | setpgrp (0, 0); |
3ea1d291 | 1790 | #endif |
d0d6b7c5 JB |
1791 | #endif |
1792 | } | |
1793 | #endif /* TIOCNOTTY */ | |
1794 | ||
99153b9e | 1795 | #if !defined (RTU) && !defined (UNIPLUS) && !defined (DONT_REOPEN_PTY) |
d0d6b7c5 | 1796 | /*** There is a suggestion that this ought to be a |
99153b9e RS |
1797 | conditional on TIOCSPGRP, |
1798 | or !(defined (HAVE_SETSID) && defined (TIOCSCTTY)). | |
1799 | Trying the latter gave the wrong results on Debian GNU/Linux 1.1; | |
1800 | that system does seem to need this code, even though | |
1801 | both HAVE_SETSID and TIOCSCTTY are defined. */ | |
d0d6b7c5 JB |
1802 | /* Now close the pty (if we had it open) and reopen it. |
1803 | This makes the pty the controlling terminal of the subprocess. */ | |
1804 | if (pty_flag) | |
1805 | { | |
99e3d726 RS |
1806 | #ifdef SET_CHILD_PTY_PGRP |
1807 | int pgrp = getpid (); | |
1808 | #endif | |
1809 | ||
68c45bf0 PE |
1810 | /* I wonder if emacs_close (emacs_open (pty_name, ...)) |
1811 | would work? */ | |
d0d6b7c5 | 1812 | if (xforkin >= 0) |
68c45bf0 PE |
1813 | emacs_close (xforkin); |
1814 | xforkout = xforkin = emacs_open (pty_name, O_RDWR, 0); | |
d0d6b7c5 | 1815 | |
4aa54ba8 RS |
1816 | if (xforkin < 0) |
1817 | { | |
68c45bf0 PE |
1818 | emacs_write (1, "Couldn't open the pty terminal ", 31); |
1819 | emacs_write (1, pty_name, strlen (pty_name)); | |
1820 | emacs_write (1, "\n", 1); | |
4aa54ba8 RS |
1821 | _exit (1); |
1822 | } | |
1823 | ||
99e3d726 RS |
1824 | #ifdef SET_CHILD_PTY_PGRP |
1825 | ioctl (xforkin, TIOCSPGRP, &pgrp); | |
1826 | ioctl (xforkout, TIOCSPGRP, &pgrp); | |
1827 | #endif | |
d0d6b7c5 | 1828 | } |
99153b9e | 1829 | #endif /* not UNIPLUS and not RTU and not DONT_REOPEN_PTY */ |
e9bf058b | 1830 | |
d0d6b7c5 | 1831 | #ifdef SETUP_SLAVE_PTY |
13a72104 RS |
1832 | if (pty_flag) |
1833 | { | |
1834 | SETUP_SLAVE_PTY; | |
1835 | } | |
d0d6b7c5 JB |
1836 | #endif /* SETUP_SLAVE_PTY */ |
1837 | #ifdef AIX | |
1838 | /* On AIX, we've disabled SIGHUP above once we start a child on a pty. | |
1839 | Now reenable it in the child, so it will die when we want it to. */ | |
1840 | if (pty_flag) | |
1841 | signal (SIGHUP, SIG_DFL); | |
1842 | #endif | |
1843 | #endif /* HAVE_PTYS */ | |
1844 | ||
0dc70c33 KH |
1845 | signal (SIGINT, SIG_DFL); |
1846 | signal (SIGQUIT, SIG_DFL); | |
1847 | ||
1848 | /* Stop blocking signals in the child. */ | |
1849 | #ifdef POSIX_SIGNALS | |
1850 | sigprocmask (SIG_SETMASK, &procmask, 0); | |
1851 | #else /* !POSIX_SIGNALS */ | |
d0d6b7c5 JB |
1852 | #ifdef SIGCHLD |
1853 | #ifdef BSD4_1 | |
1854 | sigrelse (SIGCHLD); | |
1855 | #else /* not BSD4_1 */ | |
6df54671 | 1856 | #if defined (BSD_SYSTEM) || defined (UNIPLUS) || defined (HPUX) |
d0d6b7c5 JB |
1857 | sigsetmask (SIGEMPTYMASK); |
1858 | #else /* ordinary USG */ | |
63528b78 | 1859 | #if 0 |
d0d6b7c5 | 1860 | signal (SIGCHLD, sigchld); |
63528b78 | 1861 | #endif |
d0d6b7c5 JB |
1862 | #endif /* ordinary USG */ |
1863 | #endif /* not BSD4_1 */ | |
1864 | #endif /* SIGCHLD */ | |
0dc70c33 | 1865 | #endif /* !POSIX_SIGNALS */ |
5e7e1da2 | 1866 | |
ab01d0a8 RS |
1867 | if (pty_flag) |
1868 | child_setup_tty (xforkout); | |
e98d950b RS |
1869 | #ifdef WINDOWSNT |
1870 | pid = child_setup (xforkin, xforkout, xforkout, | |
1871 | new_argv, 1, current_dir); | |
1872 | #else /* not WINDOWSNT */ | |
d0d6b7c5 | 1873 | child_setup (xforkin, xforkout, xforkout, |
e065a56e | 1874 | new_argv, 1, current_dir); |
e98d950b | 1875 | #endif /* not WINDOWSNT */ |
d0d6b7c5 JB |
1876 | } |
1877 | environ = save_environ; | |
1878 | } | |
1879 | ||
ececcbec RS |
1880 | UNBLOCK_INPUT; |
1881 | ||
4a127b3b | 1882 | /* This runs in the Emacs process. */ |
d0d6b7c5 | 1883 | if (pid < 0) |
6311cf58 RS |
1884 | { |
1885 | if (forkin >= 0) | |
68c45bf0 | 1886 | emacs_close (forkin); |
6311cf58 | 1887 | if (forkin != forkout && forkout >= 0) |
68c45bf0 | 1888 | emacs_close (forkout); |
6311cf58 | 1889 | } |
4a127b3b KH |
1890 | else |
1891 | { | |
1892 | /* vfork succeeded. */ | |
1893 | XSETFASTINT (XPROCESS (process)->pid, pid); | |
d0d6b7c5 | 1894 | |
e98d950b | 1895 | #ifdef WINDOWSNT |
4a127b3b | 1896 | register_child (pid, inchannel); |
e98d950b RS |
1897 | #endif /* WINDOWSNT */ |
1898 | ||
4a127b3b KH |
1899 | /* If the subfork execv fails, and it exits, |
1900 | this close hangs. I don't know why. | |
1901 | So have an interrupt jar it loose. */ | |
30904ab7 GM |
1902 | { |
1903 | struct atimer *timer; | |
1904 | EMACS_TIME offset; | |
1905 | ||
1906 | stop_polling (); | |
1907 | EMACS_SET_SECS_USECS (offset, 1, 0); | |
1908 | timer = start_atimer (ATIMER_RELATIVE, offset, create_process_1, 0); | |
1909 | ||
1910 | XPROCESS (process)->subtty = Qnil; | |
1911 | if (forkin >= 0) | |
1912 | emacs_close (forkin); | |
1913 | ||
1914 | cancel_atimer (timer); | |
1915 | start_polling (); | |
1916 | } | |
1917 | ||
4a127b3b | 1918 | if (forkin != forkout && forkout >= 0) |
68c45bf0 | 1919 | emacs_close (forkout); |
d0d6b7c5 | 1920 | |
875e6b94 | 1921 | #ifdef HAVE_PTYS |
4a127b3b KH |
1922 | if (pty_flag) |
1923 | XPROCESS (process)->tty_name = build_string (pty_name); | |
1924 | else | |
875e6b94 | 1925 | #endif |
4a127b3b KH |
1926 | XPROCESS (process)->tty_name = Qnil; |
1927 | } | |
3b9a3dfa | 1928 | |
4a127b3b KH |
1929 | /* Restore the signal state whether vfork succeeded or not. |
1930 | (We will signal an error, below, if it failed.) */ | |
0dc70c33 | 1931 | #ifdef POSIX_SIGNALS |
351e611f | 1932 | #ifdef HAVE_WORKING_VFORK |
0dc70c33 KH |
1933 | /* Restore the parent's signal handlers. */ |
1934 | sigaction (SIGINT, &sigint_action, 0); | |
1935 | sigaction (SIGQUIT, &sigquit_action, 0); | |
1936 | #ifdef AIX | |
1937 | sigaction (SIGHUP, &sighup_action, 0); | |
1938 | #endif | |
351e611f | 1939 | #endif /* HAVE_WORKING_VFORK */ |
0dc70c33 KH |
1940 | /* Stop blocking signals in the parent. */ |
1941 | sigprocmask (SIG_SETMASK, &procmask, 0); | |
1942 | #else /* !POSIX_SIGNALS */ | |
d0d6b7c5 JB |
1943 | #ifdef SIGCHLD |
1944 | #ifdef BSD4_1 | |
1945 | sigrelse (SIGCHLD); | |
1946 | #else /* not BSD4_1 */ | |
6df54671 | 1947 | #if defined (BSD_SYSTEM) || defined (UNIPLUS) || defined (HPUX) |
d0d6b7c5 JB |
1948 | sigsetmask (SIGEMPTYMASK); |
1949 | #else /* ordinary USG */ | |
1950 | #if 0 | |
1951 | signal (SIGCHLD, sigchld); | |
1952 | /* Now really handle any of these signals | |
1953 | that came in during this function. */ | |
1954 | if (sigchld_deferred) | |
1955 | kill (getpid (), SIGCHLD); | |
1956 | #endif | |
1957 | #endif /* ordinary USG */ | |
1958 | #endif /* not BSD4_1 */ | |
1959 | #endif /* SIGCHLD */ | |
0dc70c33 | 1960 | #endif /* !POSIX_SIGNALS */ |
4a127b3b KH |
1961 | |
1962 | /* Now generate the error if vfork failed. */ | |
1963 | if (pid < 0) | |
1964 | report_file_error ("Doing vfork", Qnil); | |
d0d6b7c5 JB |
1965 | } |
1966 | #endif /* not VMS */ | |
1967 | ||
e690ca94 | 1968 | \f |
d0d6b7c5 JB |
1969 | #ifdef HAVE_SOCKETS |
1970 | ||
e690ca94 KS |
1971 | /* Convert an internal struct sockaddr to a lisp object (vector or string). |
1972 | The address family of sa is not included in the result. */ | |
1973 | ||
1974 | static Lisp_Object | |
1975 | conv_sockaddr_to_lisp (sa, len) | |
1976 | struct sockaddr *sa; | |
1977 | int len; | |
1978 | { | |
1979 | Lisp_Object address; | |
1980 | int i; | |
1981 | unsigned char *cp; | |
1982 | register struct Lisp_Vector *p; | |
1983 | ||
1984 | switch (sa->sa_family) | |
1985 | { | |
1986 | case AF_INET: | |
1987 | { | |
1988 | struct sockaddr_in *sin = (struct sockaddr_in *) sa; | |
1989 | len = sizeof (sin->sin_addr) + 1; | |
1990 | address = Fmake_vector (make_number (len), Qnil); | |
1991 | p = XVECTOR (address); | |
1992 | p->contents[--len] = make_number (ntohs (sin->sin_port)); | |
1993 | cp = (unsigned char *)&sin->sin_addr; | |
1994 | break; | |
1995 | } | |
1996 | #ifdef HAVE_LOCAL_SOCKETS | |
1997 | case AF_LOCAL: | |
1998 | { | |
1999 | struct sockaddr_un *sun = (struct sockaddr_un *) sa; | |
2000 | for (i = 0; i < sizeof (sun->sun_path); i++) | |
2001 | if (sun->sun_path[i] == 0) | |
2002 | break; | |
2003 | return make_unibyte_string (sun->sun_path, i); | |
2004 | } | |
2005 | #endif | |
2006 | default: | |
2007 | len -= sizeof (sa->sa_family); | |
2008 | address = Fcons (make_number (sa->sa_family), | |
2009 | Fmake_vector (make_number (len), Qnil)); | |
2010 | p = XVECTOR (XCDR (address)); | |
2011 | cp = (unsigned char *) sa + sizeof (sa->sa_family); | |
2012 | break; | |
2013 | } | |
2014 | ||
2015 | i = 0; | |
2016 | while (i < len) | |
2017 | p->contents[i++] = make_number (*cp++); | |
2018 | ||
2019 | return address; | |
2020 | } | |
2021 | ||
2022 | ||
2023 | /* Get family and required size for sockaddr structure to hold ADDRESS. */ | |
2024 | ||
2025 | static int | |
2026 | get_lisp_to_sockaddr_size (address, familyp) | |
2027 | Lisp_Object address; | |
2028 | int *familyp; | |
2029 | { | |
2030 | register struct Lisp_Vector *p; | |
2031 | ||
2032 | if (VECTORP (address)) | |
2033 | { | |
2034 | p = XVECTOR (address); | |
2035 | if (p->size == 5) | |
2036 | { | |
2037 | *familyp = AF_INET; | |
2038 | return sizeof (struct sockaddr_in); | |
2039 | } | |
2040 | } | |
2041 | #ifdef HAVE_LOCAL_SOCKETS | |
2042 | else if (STRINGP (address)) | |
2043 | { | |
2044 | *familyp = AF_LOCAL; | |
2045 | return sizeof (struct sockaddr_un); | |
2046 | } | |
2047 | #endif | |
2048 | else if (CONSP (address) && INTEGERP (XCAR (address)) && VECTORP (XCDR (address))) | |
2049 | { | |
2050 | struct sockaddr *sa; | |
2051 | *familyp = XINT (XCAR (address)); | |
2052 | p = XVECTOR (XCDR (address)); | |
2053 | return p->size + sizeof (sa->sa_family); | |
2054 | } | |
2055 | return 0; | |
2056 | } | |
2057 | ||
2058 | /* Convert an address object (vector or string) to an internal sockaddr. | |
2059 | Format of address has already been validated by size_lisp_to_sockaddr. */ | |
2060 | ||
2061 | static void | |
2062 | conv_lisp_to_sockaddr (family, address, sa, len) | |
2063 | int family; | |
2064 | Lisp_Object address; | |
2065 | struct sockaddr *sa; | |
2066 | int len; | |
2067 | { | |
2068 | register struct Lisp_Vector *p; | |
2069 | register unsigned char *cp; | |
2070 | register int i; | |
2071 | ||
2072 | bzero (sa, len); | |
2073 | sa->sa_family = family; | |
2074 | ||
2075 | if (VECTORP (address)) | |
2076 | { | |
2077 | p = XVECTOR (address); | |
2078 | if (family == AF_INET) | |
2079 | { | |
2080 | struct sockaddr_in *sin = (struct sockaddr_in *) sa; | |
2081 | len = sizeof (sin->sin_addr) + 1; | |
2082 | i = XINT (p->contents[--len]); | |
2083 | sin->sin_port = htons (i); | |
2084 | cp = (unsigned char *)&sin->sin_addr; | |
2085 | } | |
2086 | } | |
2087 | else if (STRINGP (address)) | |
2088 | { | |
2089 | #ifdef HAVE_LOCAL_SOCKETS | |
2090 | if (family == AF_LOCAL) | |
2091 | { | |
2092 | struct sockaddr_un *sun = (struct sockaddr_un *) sa; | |
2093 | cp = XSTRING (address)->data; | |
2094 | for (i = 0; i < sizeof (sun->sun_path) && *cp; i++) | |
2095 | sun->sun_path[i] = *cp++; | |
2096 | } | |
2097 | #endif | |
2098 | return; | |
2099 | } | |
2100 | else | |
2101 | { | |
2102 | p = XVECTOR (XCDR (address)); | |
2103 | cp = (unsigned char *)sa + sizeof (sa->sa_family); | |
2104 | } | |
2105 | ||
2106 | for (i = 0; i < len; i++) | |
2107 | if (INTEGERP (p->contents[i])) | |
2108 | *cp++ = XFASTINT (p->contents[i]) & 0xff; | |
2109 | } | |
2110 | ||
2111 | #ifdef DATAGRAM_SOCKETS | |
2112 | DEFUN ("process-datagram-address", Fprocess_datagram_address, Sprocess_datagram_address, | |
2113 | 1, 1, 0, | |
2114 | doc: /* Get the current datagram address associated with PROCESS. */) | |
2115 | (process) | |
2116 | Lisp_Object process; | |
2117 | { | |
2118 | int channel; | |
2119 | ||
2120 | CHECK_PROCESS (process); | |
2121 | ||
2122 | if (!DATAGRAM_CONN_P (process)) | |
2123 | return Qnil; | |
2124 | ||
2125 | channel = XPROCESS (process)->infd; | |
2126 | return conv_sockaddr_to_lisp (datagram_address[channel].sa, | |
2127 | datagram_address[channel].len); | |
2128 | } | |
2129 | ||
2130 | DEFUN ("set-process-datagram-address", Fset_process_datagram_address, Sset_process_datagram_address, | |
2131 | 2, 2, 0, | |
2132 | doc: /* Set the datagram address for PROCESS to ADDRESS. | |
2133 | Returns nil upon error setting address, ADDRESS otherwise. */) | |
2134 | (process, address) | |
2135 | Lisp_Object process, address; | |
2136 | { | |
2137 | int channel; | |
2138 | int family, len; | |
2139 | ||
2140 | CHECK_PROCESS (process); | |
2141 | ||
2142 | if (!DATAGRAM_CONN_P (process)) | |
2143 | return Qnil; | |
2144 | ||
2145 | channel = XPROCESS (process)->infd; | |
2146 | ||
2147 | len = get_lisp_to_sockaddr_size (address, &family); | |
2148 | if (datagram_address[channel].len != len) | |
2149 | return Qnil; | |
2150 | conv_lisp_to_sockaddr (family, address, datagram_address[channel].sa, len); | |
2151 | return address; | |
2152 | } | |
2153 | #endif | |
2154 | \f | |
2155 | ||
2156 | static struct socket_options { | |
2157 | /* The name of this option. Should be lowercase version of option | |
2158 | name without SO_ prefix. */ | |
2159 | char *name; | |
2160 | /* Length of name. */ | |
2161 | int nlen; | |
2162 | /* Option level SOL_... */ | |
2163 | int optlevel; | |
2164 | /* Option number SO_... */ | |
2165 | int optnum; | |
2166 | enum { SOPT_UNKNOWN, SOPT_BOOL, SOPT_INT, SOPT_STR, SOPT_LINGER } opttype; | |
2167 | } socket_options[] = | |
2168 | { | |
2169 | #ifdef SO_BINDTODEVICE | |
2170 | { "bindtodevice", 12, SOL_SOCKET, SO_BINDTODEVICE, SOPT_STR }, | |
2171 | #endif | |
2172 | #ifdef SO_BROADCAST | |
2173 | { "broadcast", 9, SOL_SOCKET, SO_BROADCAST, SOPT_BOOL }, | |
2174 | #endif | |
2175 | #ifdef SO_DONTROUTE | |
2176 | { "dontroute", 9, SOL_SOCKET, SO_DONTROUTE, SOPT_BOOL }, | |
2177 | #endif | |
2178 | #ifdef SO_KEEPALIVE | |
2179 | { "keepalive", 9, SOL_SOCKET, SO_KEEPALIVE, SOPT_BOOL }, | |
2180 | #endif | |
2181 | #ifdef SO_LINGER | |
2182 | { "linger", 6, SOL_SOCKET, SO_LINGER, SOPT_LINGER }, | |
2183 | #endif | |
2184 | #ifdef SO_OOBINLINE | |
2185 | { "oobinline", 9, SOL_SOCKET, SO_OOBINLINE, SOPT_BOOL }, | |
2186 | #endif | |
2187 | #ifdef SO_PRIORITY | |
2188 | { "priority", 8, SOL_SOCKET, SO_PRIORITY, SOPT_INT }, | |
2189 | #endif | |
2190 | #ifdef SO_REUSEADDR | |
2191 | { "reuseaddr", 9, SOL_SOCKET, SO_REUSEADDR, SOPT_BOOL }, | |
2192 | #endif | |
2193 | { 0, 0, 0, 0, SOPT_UNKNOWN } | |
2194 | }; | |
2195 | ||
2196 | /* Process list of socket options OPTS on socket S. | |
2197 | Only check if options are supported is S < 0. | |
2198 | If NO_ERROR is non-zero, continue silently if an option | |
2199 | cannot be set. | |
2200 | ||
2201 | Each element specifies one option. An element is either a string | |
2202 | "OPTION=VALUE" or a cons (OPTION . VALUE) where OPTION is a string | |
2203 | or a symbol. */ | |
2204 | ||
2205 | static int | |
2206 | set_socket_options (s, opts, no_error) | |
2207 | int s; | |
2208 | Lisp_Object opts; | |
2209 | int no_error; | |
2210 | { | |
2211 | if (!CONSP (opts)) | |
2212 | opts = Fcons (opts, Qnil); | |
2213 | ||
2214 | while (CONSP (opts)) | |
2215 | { | |
2216 | Lisp_Object opt; | |
2217 | Lisp_Object val; | |
2218 | char *name, *arg; | |
2219 | struct socket_options *sopt; | |
e690ca94 KS |
2220 | int ret = 0; |
2221 | ||
2222 | opt = XCAR (opts); | |
2223 | opts = XCDR (opts); | |
2224 | ||
2225 | name = 0; | |
2226 | val = Qt; | |
2227 | if (CONSP (opt)) | |
2228 | { | |
2229 | val = XCDR (opt); | |
2230 | opt = XCAR (opt); | |
2231 | } | |
2232 | if (STRINGP (opt)) | |
2233 | name = (char *) XSTRING (opt)->data; | |
2234 | else if (SYMBOLP (opt)) | |
2235 | name = (char *) XSYMBOL (opt)->name->data; | |
2236 | else { | |
2237 | error ("Mal-formed option list"); | |
2238 | return 0; | |
2239 | } | |
2240 | ||
2241 | if (strncmp (name, "no", 2) == 0) | |
2242 | { | |
2243 | val = Qnil; | |
2244 | name += 2; | |
2245 | } | |
2246 | ||
2247 | arg = 0; | |
2248 | for (sopt = socket_options; sopt->name; sopt++) | |
2249 | if (strncmp (name, sopt->name, sopt->nlen) == 0) | |
2250 | { | |
2251 | if (name[sopt->nlen] == 0) | |
2252 | break; | |
2253 | if (name[sopt->nlen] == '=') | |
2254 | { | |
2255 | arg = name + sopt->nlen + 1; | |
2256 | break; | |
2257 | } | |
2258 | } | |
2259 | ||
2260 | switch (sopt->opttype) | |
2261 | { | |
2262 | case SOPT_BOOL: | |
2263 | { | |
2264 | int optval; | |
2265 | if (s < 0) | |
2266 | return 1; | |
2267 | if (arg) | |
2268 | optval = (*arg == '0' || *arg == 'n') ? 0 : 1; | |
2269 | else if (INTEGERP (val)) | |
2270 | optval = XINT (val) == 0 ? 0 : 1; | |
2271 | else | |
2272 | optval = NILP (val) ? 0 : 1; | |
2273 | ret = setsockopt (s, sopt->optlevel, sopt->optnum, | |
2274 | &optval, sizeof (optval)); | |
2275 | break; | |
2276 | } | |
2277 | ||
2278 | case SOPT_INT: | |
2279 | { | |
2280 | int optval; | |
2281 | if (arg) | |
2282 | optval = atoi(arg); | |
2283 | else if (INTEGERP (val)) | |
2284 | optval = XINT (val); | |
2285 | else | |
2286 | error ("Bad option argument for %s", name); | |
2287 | if (s < 0) | |
2288 | return 1; | |
2289 | ret = setsockopt (s, sopt->optlevel, sopt->optnum, | |
2290 | &optval, sizeof (optval)); | |
2291 | break; | |
2292 | } | |
2293 | ||
2294 | case SOPT_STR: | |
2295 | { | |
2296 | if (!arg) | |
2297 | { | |
2298 | if (NILP (val)) | |
2299 | arg = ""; | |
2300 | else if (STRINGP (val)) | |
2301 | arg = (char *) XSTRING (val)->data; | |
2302 | else if (XSYMBOL (val)) | |
2303 | arg = (char *) XSYMBOL (val)->name->data; | |
2304 | else | |
2305 | error ("Invalid argument to %s option", name); | |
2306 | } | |
2307 | ret = setsockopt (s, sopt->optlevel, sopt->optnum, | |
2308 | arg, strlen (arg)); | |
2309 | } | |
2310 | ||
2311 | #ifdef SO_LINGER | |
2312 | case SOPT_LINGER: | |
2313 | { | |
2314 | struct linger linger; | |
2315 | ||
2316 | linger.l_onoff = 1; | |
2317 | linger.l_linger = 0; | |
2318 | ||
2319 | if (s < 0) | |
2320 | return 1; | |
2321 | ||
2322 | if (arg) | |
2323 | { | |
2324 | if (*arg == 'n' || *arg == 't' || *arg == 'y') | |
2325 | linger.l_onoff = (*arg == 'n') ? 0 : 1; | |
2326 | else | |
2327 | linger.l_linger = atoi(arg); | |
2328 | } | |
2329 | else if (INTEGERP (val)) | |
2330 | linger.l_linger = XINT (val); | |
2331 | else | |
2332 | linger.l_onoff = NILP (val) ? 0 : 1; | |
2333 | ret = setsockopt (s, sopt->optlevel, sopt->optnum, | |
2334 | &linger, sizeof (linger)); | |
2335 | break; | |
2336 | } | |
2337 | #endif | |
2338 | default: | |
2339 | if (s < 0) | |
2340 | return 0; | |
2341 | if (no_error) | |
2342 | continue; | |
2343 | error ("Unsupported option: %s", name); | |
2344 | } | |
2345 | if (ret < 0 && ! no_error) | |
2346 | report_file_error ("Cannot set network option: %s", opt); | |
2347 | } | |
2348 | return 1; | |
2349 | } | |
2350 | ||
2351 | DEFUN ("set-network-process-options", | |
2352 | Fset_network_process_options, Sset_network_process_options, | |
2353 | 1, MANY, 0, | |
2354 | doc: /* Set one or more options for network process PROCESS. | |
2355 | Arguments are PROCESS &rest OPTIONS. | |
2356 | Each option is either a string "OPT=VALUE" or a cons (OPT . VALUE). | |
2357 | A boolean value is false if it either zero or nil, true otherwise. | |
2358 | ||
2359 | The following options are known. Consult the relevant system manual | |
2360 | pages for more information. | |
2361 | ||
2362 | bindtodevice=NAME -- bind to interface NAME, or remove binding if nil. | |
2363 | broadcast=BOOL -- Allow send and receive of datagram broadcasts. | |
2364 | dontroute=BOOL -- Only send to directly connected hosts. | |
2365 | keepalive=BOOL -- Send keep-alive messages on network stream. | |
2366 | linger=BOOL or TIMEOUT -- Send queued messages before closing. | |
2367 | oobinline=BOOL -- Place out-of-band data in receive data stream. | |
2368 | priority=INT -- Set protocol defined priority for sent packets. | |
2369 | reuseaddr=BOOL -- Allow reusing a recently used address. */) | |
2370 | (nargs, args) | |
2371 | int nargs; | |
2372 | Lisp_Object *args; | |
2373 | { | |
2374 | Lisp_Object process; | |
2375 | Lisp_Object opts; | |
2376 | ||
2377 | process = args[0]; | |
2378 | CHECK_PROCESS (process); | |
2379 | if (nargs > 1 && XPROCESS (process)->infd >= 0) | |
2380 | { | |
2381 | opts = Flist (nargs, args); | |
2382 | set_socket_options (XPROCESS (process)->infd, opts, 0); | |
2383 | } | |
2384 | return process; | |
2385 | } | |
2386 | \f | |
2387 | /* Check whether a given KEY VALUE pair is supported on this system. */ | |
2388 | ||
2389 | static int | |
2390 | network_process_featurep (key, value) | |
2391 | Lisp_Object key, value; | |
2392 | { | |
2393 | ||
2394 | if (EQ (key, QCnowait)) | |
2395 | { | |
2396 | #ifdef NON_BLOCKING_CONNECT | |
2397 | return 1; | |
2398 | #else | |
2399 | return NILP (value); | |
2400 | #endif | |
2401 | } | |
2402 | ||
2403 | if (EQ (key, QCdatagram)) | |
2404 | { | |
2405 | #ifdef DATAGRAM_SOCKETS | |
2406 | return 1; | |
2407 | #else | |
2408 | return NILP (value); | |
2409 | #endif | |
2410 | } | |
2411 | ||
2412 | if (EQ (key, QCfamily)) | |
2413 | { | |
2414 | if (NILP (value)) | |
2415 | return 1; | |
2416 | #ifdef HAVE_LOCAL_SOCKETS | |
2417 | if (EQ (key, Qlocal)) | |
2418 | return 1; | |
2419 | #endif | |
2420 | return 0; | |
2421 | } | |
2422 | ||
2423 | if (EQ (key, QCname)) | |
2424 | return STRINGP (value); | |
2425 | ||
2426 | if (EQ (key, QCbuffer)) | |
2427 | return (NILP (value) || STRINGP (value) || BUFFERP (value)); | |
2428 | ||
2429 | if (EQ (key, QClocal) || EQ (key, QCremote)) | |
2430 | { | |
2431 | int family; | |
2432 | return get_lisp_to_sockaddr_size (value, &family); | |
2433 | } | |
2434 | ||
2435 | if (EQ (key, QChost)) | |
2436 | return (NILP (value) || STRINGP (value)); | |
2437 | ||
2438 | if (EQ (key, QCservice)) | |
2439 | { | |
2440 | #ifdef HAVE_GETSOCKNAME | |
2441 | if (EQ (value, Qt)) | |
2442 | return 1; | |
2443 | #endif | |
2444 | return (INTEGERP (value) || STRINGP (value)); | |
2445 | } | |
2446 | ||
2447 | if (EQ (key, QCserver)) | |
2448 | { | |
2449 | #ifndef TERM | |
2450 | return 1; | |
2451 | #else | |
2452 | return NILP (value); | |
2453 | #endif | |
2454 | } | |
2455 | ||
2456 | if (EQ (key, QCoptions)) | |
2457 | return set_socket_options (-1, value, 0); | |
2458 | ||
2459 | if (EQ (key, QCcoding)) | |
2460 | return 1; | |
2461 | if (EQ (key, QCsentinel)) | |
2462 | return 1; | |
2463 | if (EQ (key, QCfilter)) | |
2464 | return 1; | |
2465 | if (EQ (key, QClog)) | |
2466 | return 1; | |
2467 | if (EQ (key, QCnoquery)) | |
2468 | return 1; | |
2469 | if (EQ (key, QCstop)) | |
2470 | return 1; | |
2471 | ||
2472 | return 0; | |
2473 | } | |
2474 | ||
2475 | /* A version of request_sigio suitable for a record_unwind_protect. */ | |
2476 | ||
2477 | Lisp_Object | |
2478 | unwind_request_sigio (dummy) | |
2479 | Lisp_Object dummy; | |
2480 | { | |
2481 | if (interrupt_input) | |
2482 | request_sigio (); | |
2483 | return Qnil; | |
2484 | } | |
2485 | ||
2486 | /* Create a network stream/datagram client/server process. Treated | |
2487 | exactly like a normal process when reading and writing. Primary | |
d0d6b7c5 JB |
2488 | differences are in status display and process deletion. A network |
2489 | connection has no PID; you cannot signal it. All you can do is | |
e690ca94 KS |
2490 | stop/continue it and deactivate/close it via delete-process */ |
2491 | ||
2492 | DEFUN ("make-network-process", Fmake_network_process, Smake_network_process, | |
2493 | 0, MANY, 0, | |
2494 | doc: /* Create and return a network server or client process. | |
2495 | ||
fa9d4315 | 2496 | In Emacs, network connections are represented by process objects, so |
e690ca94 KS |
2497 | input and output work as for subprocesses and `delete-process' closes |
2498 | a network connection. However, a network process has no process id, | |
2499 | it cannot be signalled, and the status codes are different from normal | |
2500 | processes. | |
2501 | ||
2502 | Arguments are specified as keyword/argument pairs. The following | |
2503 | arguments are defined: | |
2504 | ||
2505 | :name NAME -- NAME is name for process. It is modified if necessary | |
2506 | to make it unique. | |
2507 | ||
2508 | :buffer BUFFER -- BUFFER is the buffer (or buffer-name) to associate | |
2509 | with the process. Process output goes at end of that buffer, unless | |
2510 | you specify an output stream or filter function to handle the output. | |
2511 | BUFFER may be also nil, meaning that this process is not associated | |
2512 | with any buffer. | |
2513 | ||
2514 | :host HOST -- HOST is name of the host to connect to, or its IP | |
2515 | address. The symbol `local' specifies the local host. If specified | |
2516 | for a server process, it must be a valid name or address for the local | |
2517 | host, and only clients connecting to that address will be accepted. | |
2518 | ||
2519 | :service SERVICE -- SERVICE is name of the service desired, or an | |
2520 | integer specifying a port number to connect to. If SERVICE is t, | |
2521 | a random port number is selected for the server. | |
2522 | ||
2523 | :family FAMILY -- FAMILY is the address (and protocol) family for the | |
2524 | service specified by HOST and SERVICE. The default address family is | |
2525 | Inet (or IPv4) for the host and port number specified by HOST and | |
2526 | SERVICE. Other address families supported are: | |
2527 | local -- for a local (i.e. UNIX) address specified by SERVICE. | |
2528 | ||
2529 | :local ADDRESS -- ADDRESS is the local address used for the connection. | |
2530 | This parameter is ignored when opening a client process. When specified | |
2531 | for a server process, the FAMILY, HOST and SERVICE args are ignored. | |
2532 | ||
2533 | :remote ADDRESS -- ADDRESS is the remote partner's address for the | |
2534 | connection. This parameter is ignored when opening a stream server | |
2535 | process. For a datagram server process, it specifies the initial | |
2536 | setting of the remote datagram address. When specified for a client | |
2537 | process, the FAMILY, HOST, and SERVICE args are ignored. | |
2538 | ||
2539 | The format of ADDRESS depends on the address family: | |
2540 | - An IPv4 address is represented as an vector of integers [A B C D P] | |
2541 | corresponding to numeric IP address A.B.C.D and port number P. | |
2542 | - A local address is represented as a string with the address in the | |
2543 | local address space. | |
2544 | - An "unsupported family" address is represented by a cons (F . AV) | |
2545 | where F is the family number and AV is a vector containing the socket | |
2546 | address data with one element per address data byte. Do not rely on | |
2547 | this format in portable code, as it may depend on implementation | |
2548 | defined constants, data sizes, and data structure alignment. | |
2549 | ||
2550 | :coding CODING -- CODING is coding system for this process. | |
2551 | ||
2552 | :datagram BOOL -- Create a datagram type connection if BOOL is | |
2553 | non-nil. Default is a stream type connection. | |
2554 | ||
2555 | :options OPTIONS -- Set the specified options for the network process. | |
2556 | See `set-process-options' for details. | |
2557 | ||
2558 | :nowait BOOL -- If BOOL is non-nil for a stream type client process, | |
2559 | return without waiting for the connection to complete; instead, the | |
2560 | sentinel function will be called with second arg matching "open" (if | |
2561 | successful) or "failed" when the connect completes. Default is to use | |
2562 | a blocking connect (i.e. wait) for stream type connections. | |
2563 | ||
2564 | :noquery BOOL -- Query the user unless BOOL is non-nil, and process is | |
2565 | running when emacs is exited. | |
2566 | ||
2567 | :stop BOOL -- Start process in the `stopped' state if BOOL non-nil. | |
2568 | In the stopped state, a server process does not accept new | |
2569 | connections, and a client process does not handle incoming traffic. | |
2570 | The stopped state is cleared by `continue-process' and set by | |
2571 | `stop-process'. | |
2572 | ||
2573 | :filter FILTER -- Install FILTER as the process filter. | |
2574 | ||
2575 | :sentinel SENTINEL -- Install SENTINEL as the process sentinel. | |
2576 | ||
2577 | :log LOG -- Install LOG as the server process log function. This | |
2578 | function is called as when the server accepts a network connection from a | |
2579 | client. The arguments are SERVER, CLIENT, and MESSAGE, where SERVER | |
2580 | is the server process, CLIENT is the new process for the connection, | |
2581 | and MESSAGE is a string. | |
2582 | ||
2583 | :server BOOL -- if BOOL is non-nil, create a server process for the | |
2584 | specified FAMILY, SERVICE, and connection type (stream or datagram). | |
2585 | Default is a client process. | |
2586 | ||
2587 | A server process will listen for and accept connections from | |
2588 | clients. When a client connection is accepted, a new network process | |
2589 | is created for the connection with the following parameters: | |
2590 | - The client's process name is constructed by concatenating the server | |
2591 | process' NAME and a client identification string. | |
2592 | - If the FILTER argument is non-nil, the client process will not get a | |
2593 | separate process buffer; otherwise, the client's process buffer is a newly | |
2594 | created buffer named after the server process' BUFFER name or process | |
2595 | NAME concatenated with the client identification string. | |
2596 | - The connection type and the process filter and sentinel parameters are | |
2597 | inherited from the server process' TYPE, FILTER and SENTINEL. | |
2598 | - The client process' contact info is set according to the client's | |
2599 | addressing information (typically an IP address and a port number). | |
2600 | ||
2601 | Notice that the FILTER and SENTINEL args are never used directly by | |
2602 | the server process. Also, the BUFFER argument is not used directly by | |
2603 | the server process, but via `network-server-log-function' hook, a log | |
2604 | of the accepted (and failed) connections may be recorded in the server | |
2605 | process' buffer. | |
2606 | ||
2607 | The following special call returns t iff a given KEY VALUE | |
2608 | pair is supported on this system: | |
fa9d4315 PJ |
2609 | (make-network-process :feature KEY VALUE) |
2610 | ||
2611 | usage: (make-network-process &rest ARGS) */) | |
e690ca94 KS |
2612 | (nargs, args) |
2613 | int nargs; | |
2614 | Lisp_Object *args; | |
d0d6b7c5 JB |
2615 | { |
2616 | Lisp_Object proc; | |
e690ca94 KS |
2617 | Lisp_Object contact; |
2618 | struct Lisp_Process *p; | |
70dbdb36 | 2619 | #ifdef HAVE_GETADDRINFO |
e690ca94 KS |
2620 | struct addrinfo ai, *res, *lres; |
2621 | struct addrinfo hints; | |
2622 | char *portstring, portbuf[128]; | |
70dbdb36 | 2623 | #else /* HAVE_GETADDRINFO */ |
dd2a17ab KS |
2624 | struct _emacs_addrinfo |
2625 | { | |
2626 | int ai_family; | |
2627 | int ai_socktype; | |
2628 | int ai_protocol; | |
2629 | int ai_addrlen; | |
2630 | struct sockaddr *ai_addr; | |
2631 | struct _emacs_addrinfo *ai_next; | |
2632 | } ai, *res, *lres; | |
418b48fd | 2633 | #endif /* HAVE_GETADDRINFO */ |
e690ca94 KS |
2634 | struct sockaddr_in address_in; |
2635 | #ifdef HAVE_LOCAL_SOCKETS | |
2636 | struct sockaddr_un address_un; | |
2637 | #endif | |
2638 | int port; | |
dd2a17ab KS |
2639 | int ret = 0; |
2640 | int xerrno = 0; | |
418b48fd | 2641 | int s = -1, outch, inch; |
e690ca94 | 2642 | struct gcpro gcpro1; |
e333e864 | 2643 | int retry = 0; |
44ade2e9 | 2644 | int count = specpdl_ptr - specpdl; |
5684cd6e | 2645 | int count1; |
e690ca94 KS |
2646 | Lisp_Object QCaddress; /* one of QClocal or QCremote */ |
2647 | Lisp_Object tem; | |
2648 | Lisp_Object name, buffer, host, service, address; | |
2649 | Lisp_Object filter, sentinel; | |
2650 | int is_non_blocking_client = 0; | |
2651 | int is_server = 0; | |
2652 | int socktype = SOCK_STREAM; | |
2653 | int family = -1; | |
2654 | ||
2655 | if (nargs == 0) | |
2656 | return Qnil; | |
dd2a17ab | 2657 | |
e690ca94 KS |
2658 | /* Handle :feature KEY VALUE query. */ |
2659 | if (EQ (args[0], QCfeature)) | |
dd2a17ab | 2660 | { |
e690ca94 KS |
2661 | if (nargs != 3) |
2662 | return Qnil; | |
2663 | return network_process_featurep (args[1], args[2]) ? Qt : Qnil; | |
dd2a17ab | 2664 | } |
d0d6b7c5 | 2665 | |
e690ca94 KS |
2666 | /* Save arguments for process-contact and clone-process. */ |
2667 | contact = Flist (nargs, args); | |
2668 | GCPRO1 (contact); | |
2669 | ||
bff3ed0a RS |
2670 | #ifdef WINDOWSNT |
2671 | /* Ensure socket support is loaded if available. */ | |
2672 | init_winsock (TRUE); | |
2673 | #endif | |
2674 | ||
e690ca94 KS |
2675 | /* :datagram BOOL */ |
2676 | tem = Fplist_get (contact, QCdatagram); | |
2677 | if (!NILP (tem)) | |
2678 | { | |
2679 | #ifndef DATAGRAM_SOCKETS | |
2680 | error ("Datagram connections not supported"); | |
2681 | #else | |
2682 | socktype = SOCK_DGRAM; | |
2683 | #endif | |
2684 | } | |
2685 | ||
2686 | /* :server BOOL */ | |
2687 | tem = Fplist_get (contact, QCserver); | |
2688 | if (!NILP (tem)) | |
2689 | { | |
2690 | #ifdef TERM | |
2691 | error ("Network servers not supported"); | |
2692 | #else | |
2693 | is_server = 1; | |
2694 | #endif | |
2695 | } | |
2696 | ||
2697 | /* Make QCaddress an alias for :local (server) or :remote (client). */ | |
2698 | QCaddress = is_server ? QClocal : QCremote; | |
2699 | ||
2700 | /* :wait BOOL */ | |
2701 | if (!is_server && socktype == SOCK_STREAM | |
2702 | && (tem = Fplist_get (contact, QCnowait), !NILP (tem))) | |
2703 | { | |
2704 | #ifndef NON_BLOCKING_CONNECT | |
2705 | error ("Non-blocking connect not supported"); | |
2706 | #else | |
2707 | is_non_blocking_client = 1; | |
2708 | #endif | |
2709 | } | |
2710 | ||
2711 | name = Fplist_get (contact, QCname); | |
2712 | buffer = Fplist_get (contact, QCbuffer); | |
2713 | filter = Fplist_get (contact, QCfilter); | |
2714 | sentinel = Fplist_get (contact, QCsentinel); | |
2715 | ||
b7826503 | 2716 | CHECK_STRING (name); |
e690ca94 KS |
2717 | |
2718 | #ifdef TERM | |
2719 | /* Let's handle TERM before things get complicated ... */ | |
2720 | host = Fplist_get (contact, QChost); | |
b7826503 | 2721 | CHECK_STRING (host); |
e690ca94 KS |
2722 | |
2723 | service = Fplist_get (contact, QCservice); | |
2724 | if (INTEGERP (service)) | |
2725 | port = htons ((unsigned short) XINT (service)); | |
2726 | else | |
2727 | { | |
2728 | struct servent *svc_info; | |
2729 | CHECK_STRING (service); | |
2730 | svc_info = getservbyname (XSTRING (service)->data, "tcp"); | |
2731 | if (svc_info == 0) | |
2732 | error ("Unknown service: %s", XSTRING (service)->data); | |
2733 | port = svc_info->s_port; | |
2734 | } | |
2735 | ||
2736 | s = connect_server (0); | |
2737 | if (s < 0) | |
2738 | report_file_error ("error creating socket", Fcons (name, Qnil)); | |
2739 | send_command (s, C_PORT, 0, "%s:%d", XSTRING (host)->data, ntohs (port)); | |
2740 | send_command (s, C_DUMB, 1, 0); | |
2741 | ||
2742 | #else /* not TERM */ | |
2743 | ||
2744 | /* Initialize addrinfo structure in case we don't use getaddrinfo. */ | |
2745 | ai.ai_socktype = socktype; | |
2746 | ai.ai_protocol = 0; | |
2747 | ai.ai_next = NULL; | |
2748 | res = &ai; | |
a319f7c1 | 2749 | |
e690ca94 KS |
2750 | /* :local ADDRESS or :remote ADDRESS */ |
2751 | address = Fplist_get (contact, QCaddress); | |
2752 | if (!NILP (address)) | |
a319f7c1 | 2753 | { |
e690ca94 KS |
2754 | host = service = Qnil; |
2755 | ||
2756 | if (!(ai.ai_addrlen = get_lisp_to_sockaddr_size (address, &family))) | |
2757 | error ("Malformed :address"); | |
2758 | ai.ai_family = family; | |
2759 | ai.ai_addr = alloca (ai.ai_addrlen); | |
2760 | conv_lisp_to_sockaddr (family, address, ai.ai_addr, ai.ai_addrlen); | |
2761 | goto open_socket; | |
a319f7c1 | 2762 | } |
e690ca94 KS |
2763 | |
2764 | /* :family FAMILY -- nil (for Inet), local, or integer. */ | |
2765 | tem = Fplist_get (contact, QCfamily); | |
2766 | if (INTEGERP (tem)) | |
2767 | family = XINT (tem); | |
a319f7c1 KH |
2768 | else |
2769 | { | |
e690ca94 KS |
2770 | if (NILP (tem)) |
2771 | family = AF_INET; | |
2772 | #ifdef HAVE_LOCAL_SOCKETS | |
2773 | else if (EQ (tem, Qlocal)) | |
2774 | family = AF_LOCAL; | |
2775 | #endif | |
a319f7c1 | 2776 | } |
e690ca94 KS |
2777 | if (family < 0) |
2778 | error ("Unknown address family"); | |
2779 | ai.ai_family = family; | |
2780 | ||
2781 | /* :service SERVICE -- string, integer (port number), or t (random port). */ | |
2782 | service = Fplist_get (contact, QCservice); | |
2783 | ||
2784 | #ifdef HAVE_LOCAL_SOCKETS | |
2785 | if (family == AF_LOCAL) | |
d0d6b7c5 | 2786 | { |
e690ca94 KS |
2787 | /* Host is not used. */ |
2788 | host = Qnil; | |
b7826503 | 2789 | CHECK_STRING (service); |
e690ca94 KS |
2790 | bzero (&address_un, sizeof address_un); |
2791 | address_un.sun_family = AF_LOCAL; | |
2792 | strncpy (address_un.sun_path, XSTRING (service)->data, sizeof address_un.sun_path); | |
2793 | ai.ai_addr = (struct sockaddr *) &address_un; | |
2794 | ai.ai_addrlen = sizeof address_un; | |
2795 | goto open_socket; | |
d0d6b7c5 | 2796 | } |
e690ca94 | 2797 | #endif |
a319f7c1 | 2798 | |
e690ca94 KS |
2799 | /* :host HOST -- hostname, ip address, or 'local for localhost. */ |
2800 | host = Fplist_get (contact, QChost); | |
2801 | if (!NILP (host)) | |
2802 | { | |
2803 | if (EQ (host, Qlocal)) | |
2804 | host = build_string ("localhost"); | |
2805 | CHECK_STRING (host); | |
2806 | } | |
d0d6b7c5 | 2807 | |
798b64bb KH |
2808 | /* Slow down polling to every ten seconds. |
2809 | Some kernels have a bug which causes retrying connect to fail | |
2810 | after a connect. Polling can interfere with gethostbyname too. */ | |
2811 | #ifdef POLL_FOR_INPUT | |
e690ca94 KS |
2812 | if (socktype == SOCK_STREAM) |
2813 | { | |
2814 | record_unwind_protect (unwind_stop_other_atimers, Qnil); | |
2815 | bind_polling_period (10); | |
2816 | } | |
798b64bb KH |
2817 | #endif |
2818 | ||
a319f7c1 | 2819 | #ifdef HAVE_GETADDRINFO |
e690ca94 KS |
2820 | /* If we have a host, use getaddrinfo to resolve both host and service. |
2821 | Otherwise, use getservbyname to lookup the service. */ | |
2822 | if (!NILP (host)) | |
2823 | { | |
2824 | ||
2825 | /* SERVICE can either be a string or int. | |
2826 | Convert to a C string for later use by getaddrinfo. */ | |
2827 | if (EQ (service, Qt)) | |
2828 | portstring = "0"; | |
2829 | else if (INTEGERP (service)) | |
2830 | { | |
2831 | sprintf (portbuf, "%ld", (long) XINT (service)); | |
2832 | portstring = portbuf; | |
2833 | } | |
2834 | else | |
2835 | { | |
2836 | CHECK_STRING (service); | |
2837 | portstring = XSTRING (service)->data; | |
2838 | } | |
2839 | ||
2840 | immediate_quit = 1; | |
2841 | QUIT; | |
2842 | memset (&hints, 0, sizeof (hints)); | |
2843 | hints.ai_flags = 0; | |
2844 | hints.ai_family = NILP (Fplist_member (contact, QCfamily)) ? AF_UNSPEC : family; | |
2845 | hints.ai_socktype = socktype; | |
2846 | hints.ai_protocol = 0; | |
2847 | ret = getaddrinfo (XSTRING (host)->data, portstring, &hints, &res); | |
2848 | if (ret) | |
f6270f62 | 2849 | #ifdef HAVE_GAI_STRERROR |
e690ca94 | 2850 | error ("%s/%s %s", XSTRING (host)->data, portstring, gai_strerror(ret)); |
f6270f62 | 2851 | #else |
e690ca94 | 2852 | error ("%s/%s getaddrinfo error %d", XSTRING (host)->data, portstring, ret); |
f6270f62 | 2853 | #endif |
e690ca94 | 2854 | immediate_quit = 0; |
a319f7c1 | 2855 | |
e690ca94 KS |
2856 | goto open_socket; |
2857 | } | |
2858 | #endif /* HAVE_GETADDRINFO */ | |
a319f7c1 | 2859 | |
e690ca94 KS |
2860 | /* We end up here if getaddrinfo is not defined, or in case no hostname |
2861 | has been specified (e.g. for a local server process). */ | |
2862 | ||
2863 | if (EQ (service, Qt)) | |
2864 | port = 0; | |
2865 | else if (INTEGERP (service)) | |
2866 | port = htons ((unsigned short) XINT (service)); | |
2867 | else | |
616da37c | 2868 | { |
e690ca94 KS |
2869 | struct servent *svc_info; |
2870 | CHECK_STRING (service); | |
2871 | svc_info = getservbyname (XSTRING (service)->data, | |
2872 | (socktype == SOCK_DGRAM ? "udp" : "tcp")); | |
2873 | if (svc_info == 0) | |
2874 | error ("Unknown service: %s", XSTRING (service)->data); | |
2875 | port = svc_info->s_port; | |
2876 | } | |
2877 | ||
2878 | bzero (&address_in, sizeof address_in); | |
2879 | address_in.sin_family = family; | |
2880 | address_in.sin_addr.s_addr = INADDR_ANY; | |
2881 | address_in.sin_port = port; | |
2882 | ||
2883 | #ifndef HAVE_GETADDRINFO | |
2884 | if (!NILP (host)) | |
2885 | { | |
2886 | struct hostent *host_info_ptr; | |
2887 | ||
2888 | /* gethostbyname may fail with TRY_AGAIN, but we don't honour that, | |
2889 | as it may `hang' emacs for a very long time. */ | |
5d6c2aa3 RS |
2890 | immediate_quit = 1; |
2891 | QUIT; | |
616da37c | 2892 | host_info_ptr = gethostbyname (XSTRING (host)->data); |
5d6c2aa3 | 2893 | immediate_quit = 0; |
70dbdb36 | 2894 | |
e690ca94 KS |
2895 | if (host_info_ptr) |
2896 | { | |
2897 | bcopy (host_info_ptr->h_addr, (char *) &address_in.sin_addr, | |
2898 | host_info_ptr->h_length); | |
2899 | family = host_info_ptr->h_addrtype; | |
2900 | address_in.sin_family = family; | |
2901 | } | |
2902 | else | |
2903 | /* Attempt to interpret host as numeric inet address */ | |
2904 | { | |
2905 | IN_ADDR numeric_addr; | |
2906 | numeric_addr = inet_addr ((char *) XSTRING (host)->data); | |
2907 | if (NUMERIC_ADDR_ERROR) | |
2908 | error ("Unknown host \"%s\"", XSTRING (host)->data); | |
d0d6b7c5 | 2909 | |
e690ca94 KS |
2910 | bcopy ((char *)&numeric_addr, (char *) &address_in.sin_addr, |
2911 | sizeof (address_in.sin_addr)); | |
2912 | } | |
d0d6b7c5 | 2913 | |
e690ca94 | 2914 | } |
dd2a17ab | 2915 | #endif /* not HAVE_GETADDRINFO */ |
d0d6b7c5 | 2916 | |
e690ca94 KS |
2917 | ai.ai_family = family; |
2918 | ai.ai_addr = (struct sockaddr *) &address_in; | |
2919 | ai.ai_addrlen = sizeof address_in; | |
2920 | ||
2921 | open_socket: | |
2922 | ||
2923 | /* Kernel bugs (on Ultrix at least) cause lossage (not just EINTR) | |
2924 | when connect is interrupted. So let's not let it get interrupted. | |
2925 | Note we do not turn off polling, because polling is only used | |
2926 | when not interrupt_input, and thus not normally used on the systems | |
2927 | which have this bug. On systems which use polling, there's no way | |
2928 | to quit if polling is turned off. */ | |
2929 | if (interrupt_input | |
2930 | && !is_server && socktype == SOCK_STREAM) | |
2931 | { | |
2932 | /* Comment from KFS: The original open-network-stream code | |
2933 | didn't unwind protect this, but it seems like the proper | |
2934 | thing to do. In any case, I don't see how it could harm to | |
2935 | do this -- and it makes cleanup (using unbind_to) easier. */ | |
2936 | record_unwind_protect (unwind_request_sigio, Qnil); | |
2937 | unrequest_sigio (); | |
2938 | } | |
2939 | ||
dd2a17ab | 2940 | /* Do this in case we never enter the for-loop below. */ |
5684cd6e | 2941 | count1 = specpdl_ptr - specpdl; |
dd2a17ab | 2942 | s = -1; |
457a9bee | 2943 | |
dd2a17ab KS |
2944 | for (lres = res; lres; lres = lres->ai_next) |
2945 | { | |
2946 | s = socket (lres->ai_family, lres->ai_socktype, lres->ai_protocol); | |
2947 | if (s < 0) | |
2948 | { | |
2949 | xerrno = errno; | |
2950 | continue; | |
2951 | } | |
0f2ee0c1 | 2952 | |
e690ca94 KS |
2953 | #ifdef DATAGRAM_SOCKETS |
2954 | if (!is_server && socktype == SOCK_DGRAM) | |
2955 | break; | |
2956 | #endif /* DATAGRAM_SOCKETS */ | |
2957 | ||
dd2a17ab | 2958 | #ifdef NON_BLOCKING_CONNECT |
e690ca94 | 2959 | if (is_non_blocking_client) |
dd2a17ab KS |
2960 | { |
2961 | #ifdef O_NONBLOCK | |
2962 | ret = fcntl (s, F_SETFL, O_NONBLOCK); | |
2963 | #else | |
2964 | ret = fcntl (s, F_SETFL, O_NDELAY); | |
2965 | #endif | |
2966 | if (ret < 0) | |
2967 | { | |
2968 | xerrno = errno; | |
2969 | emacs_close (s); | |
2970 | s = -1; | |
2971 | continue; | |
2972 | } | |
2973 | } | |
2974 | #endif | |
e690ca94 | 2975 | |
dd2a17ab | 2976 | /* Make us close S if quit. */ |
dd2a17ab KS |
2977 | record_unwind_protect (close_file_unwind, make_number (s)); |
2978 | ||
e690ca94 KS |
2979 | if (is_server) |
2980 | { | |
2981 | /* Configure as a server socket. */ | |
2982 | #ifdef HAVE_LOCAL_SOCKETS | |
2983 | if (family != AF_LOCAL) | |
2984 | #endif | |
2985 | { | |
2986 | int optval = 1; | |
2987 | if (setsockopt (s, SOL_SOCKET, SO_REUSEADDR, &optval, sizeof optval)) | |
2988 | report_file_error ("Cannot set reuse option on server socket.", Qnil); | |
2989 | } | |
2990 | ||
2991 | if (bind (s, lres->ai_addr, lres->ai_addrlen)) | |
2992 | report_file_error ("Cannot bind server socket", Qnil); | |
2993 | ||
2994 | #ifdef HAVE_GETSOCKNAME | |
2995 | if (EQ (service, Qt)) | |
2996 | { | |
2997 | struct sockaddr_in sa1; | |
2998 | int len1 = sizeof (sa1); | |
2999 | if (getsockname (s, (struct sockaddr *)&sa1, &len1) == 0) | |
3000 | { | |
3001 | ((struct sockaddr_in *)(lres->ai_addr))->sin_port = sa1.sin_port; | |
3002 | service = make_number (sa1.sin_port); | |
3003 | contact = Fplist_put (contact, QCservice, service); | |
3004 | } | |
3005 | } | |
3006 | #endif | |
3007 | ||
3008 | if (socktype == SOCK_STREAM && listen (s, 5)) | |
3009 | report_file_error ("Cannot listen on server socket", Qnil); | |
3010 | ||
3011 | break; | |
3012 | } | |
3013 | ||
3014 | retry_connect: | |
dd2a17ab KS |
3015 | |
3016 | immediate_quit = 1; | |
3017 | QUIT; | |
3018 | ||
3019 | /* This turns off all alarm-based interrupts; the | |
3020 | bind_polling_period call above doesn't always turn all the | |
3021 | short-interval ones off, especially if interrupt_input is | |
3022 | set. | |
3023 | ||
3024 | It'd be nice to be able to control the connect timeout | |
3025 | though. Would non-blocking connect calls be portable? | |
3026 | ||
3027 | This used to be conditioned by HAVE_GETADDRINFO. Why? */ | |
3028 | ||
f40f9848 | 3029 | turn_on_atimers (0); |
dd2a17ab KS |
3030 | |
3031 | ret = connect (s, lres->ai_addr, lres->ai_addrlen); | |
3032 | xerrno = errno; | |
3033 | ||
f40f9848 | 3034 | turn_on_atimers (1); |
dd2a17ab KS |
3035 | |
3036 | if (ret == 0 || xerrno == EISCONN) | |
3037 | { | |
dd2a17ab KS |
3038 | /* The unwind-protect will be discarded afterwards. |
3039 | Likewise for immediate_quit. */ | |
3040 | break; | |
3041 | } | |
3042 | ||
3043 | #ifdef NON_BLOCKING_CONNECT | |
3044 | #ifdef EINPROGRESS | |
e690ca94 | 3045 | if (is_non_blocking_client && xerrno == EINPROGRESS) |
dd2a17ab KS |
3046 | break; |
3047 | #else | |
3048 | #ifdef EWOULDBLOCK | |
e690ca94 | 3049 | if (is_non_blocking_client && xerrno == EWOULDBLOCK) |
dd2a17ab KS |
3050 | break; |
3051 | #endif | |
3052 | #endif | |
3053 | #endif | |
e333e864 | 3054 | |
0f2ee0c1 RS |
3055 | immediate_quit = 0; |
3056 | ||
dd2a17ab | 3057 | if (xerrno == EINTR) |
e690ca94 | 3058 | goto retry_connect; |
dd2a17ab | 3059 | if (xerrno == EADDRINUSE && retry < 20) |
e333e864 | 3060 | { |
4590788a RS |
3061 | /* A delay here is needed on some FreeBSD systems, |
3062 | and it is harmless, since this retrying takes time anyway | |
3063 | and should be infrequent. */ | |
3064 | Fsleep_for (make_number (1), Qnil); | |
e333e864 | 3065 | retry++; |
e690ca94 | 3066 | goto retry_connect; |
e333e864 RS |
3067 | } |
3068 | ||
dd2a17ab | 3069 | /* Discard the unwind protect closing S. */ |
5684cd6e | 3070 | specpdl_ptr = specpdl + count1; |
68c45bf0 | 3071 | emacs_close (s); |
dd2a17ab KS |
3072 | s = -1; |
3073 | } | |
457a9bee | 3074 | |
e690ca94 KS |
3075 | if (s >= 0) |
3076 | { | |
3077 | #ifdef DATAGRAM_SOCKETS | |
3078 | if (socktype == SOCK_DGRAM) | |
3079 | { | |
3080 | if (datagram_address[s].sa) | |
3081 | abort (); | |
3082 | datagram_address[s].sa = (struct sockaddr *) xmalloc (lres->ai_addrlen); | |
3083 | datagram_address[s].len = lres->ai_addrlen; | |
3084 | if (is_server) | |
3085 | { | |
3086 | Lisp_Object remote; | |
3087 | bzero (datagram_address[s].sa, lres->ai_addrlen); | |
3088 | if (remote = Fplist_get (contact, QCremote), !NILP (remote)) | |
3089 | { | |
3090 | int rfamily, rlen; | |
3091 | rlen = get_lisp_to_sockaddr_size (remote, &rfamily); | |
3092 | if (rfamily == lres->ai_family && rlen == lres->ai_addrlen) | |
3093 | conv_lisp_to_sockaddr (rfamily, remote, | |
3094 | datagram_address[s].sa, rlen); | |
3095 | } | |
3096 | } | |
3097 | else | |
3098 | bcopy (lres->ai_addr, datagram_address[s].sa, lres->ai_addrlen); | |
3099 | } | |
3100 | #endif | |
3101 | contact = Fplist_put (contact, QCaddress, | |
3102 | conv_sockaddr_to_lisp (lres->ai_addr, lres->ai_addrlen)); | |
3103 | } | |
3104 | ||
dd2a17ab | 3105 | #ifdef HAVE_GETADDRINFO |
e690ca94 KS |
3106 | if (res != &ai) |
3107 | freeaddrinfo (res); | |
dd2a17ab KS |
3108 | #endif |
3109 | ||
e690ca94 KS |
3110 | immediate_quit = 0; |
3111 | ||
3112 | /* Discard the unwind protect for closing S, if any. */ | |
3113 | specpdl_ptr = specpdl + count1; | |
3114 | ||
3115 | /* Unwind bind_polling_period and request_sigio. */ | |
3116 | unbind_to (count, Qnil); | |
3117 | ||
dd2a17ab KS |
3118 | if (s < 0) |
3119 | { | |
dd2a17ab KS |
3120 | /* If non-blocking got this far - and failed - assume non-blocking is |
3121 | not supported after all. This is probably a wrong assumption, but | |
e690ca94 KS |
3122 | the normal blocking calls to open-network-stream handles this error |
3123 | better. */ | |
3124 | if (is_non_blocking_client) | |
dd2a17ab | 3125 | return Qnil; |
dd2a17ab | 3126 | |
d0d6b7c5 | 3127 | errno = xerrno; |
e690ca94 KS |
3128 | if (is_server) |
3129 | report_file_error ("make server process failed", contact); | |
3130 | else | |
3131 | report_file_error ("make client process failed", contact); | |
d0d6b7c5 | 3132 | } |
44ade2e9 | 3133 | |
e690ca94 KS |
3134 | tem = Fplist_get (contact, QCoptions); |
3135 | if (!NILP (tem)) | |
3136 | set_socket_options (s, tem, 1); | |
457a9bee | 3137 | |
e690ca94 | 3138 | #endif /* not TERM */ |
d0d6b7c5 JB |
3139 | |
3140 | inch = s; | |
59f23005 | 3141 | outch = s; |
d0d6b7c5 JB |
3142 | |
3143 | if (!NILP (buffer)) | |
3144 | buffer = Fget_buffer_create (buffer); | |
3145 | proc = make_process (name); | |
3146 | ||
3147 | chan_process[inch] = proc; | |
3148 | ||
3149 | #ifdef O_NONBLOCK | |
3150 | fcntl (inch, F_SETFL, O_NONBLOCK); | |
3151 | #else | |
3152 | #ifdef O_NDELAY | |
3153 | fcntl (inch, F_SETFL, O_NDELAY); | |
3154 | #endif | |
3155 | #endif | |
3156 | ||
e690ca94 KS |
3157 | p = XPROCESS (proc); |
3158 | ||
3159 | p->childp = contact; | |
3160 | p->buffer = buffer; | |
3161 | p->sentinel = sentinel; | |
3162 | p->filter = filter; | |
3163 | p->log = Fplist_get (contact, QClog); | |
3164 | if (tem = Fplist_get (contact, QCnoquery), !NILP (tem)) | |
3165 | p->kill_without_query = Qt; | |
3166 | if ((tem = Fplist_get (contact, QCstop), !NILP (tem))) | |
3167 | p->command = Qt; | |
3168 | p->pid = Qnil; | |
3169 | XSETINT (p->infd, inch); | |
3170 | XSETINT (p->outfd, outch); | |
3171 | if (is_server && socktype == SOCK_STREAM) | |
3172 | p->status = Qlisten; | |
dd2a17ab KS |
3173 | |
3174 | #ifdef NON_BLOCKING_CONNECT | |
e690ca94 | 3175 | if (is_non_blocking_client) |
dd2a17ab KS |
3176 | { |
3177 | /* We may get here if connect did succeed immediately. However, | |
3178 | in that case, we still need to signal this like a non-blocking | |
3179 | connection. */ | |
e690ca94 | 3180 | p->status = Qconnect; |
dd2a17ab KS |
3181 | if (!FD_ISSET (inch, &connect_wait_mask)) |
3182 | { | |
3183 | FD_SET (inch, &connect_wait_mask); | |
3184 | num_pending_connects++; | |
3185 | } | |
3186 | } | |
3187 | else | |
3188 | #endif | |
e690ca94 KS |
3189 | /* A server may have a client filter setting of Qt, but it must |
3190 | still listen for incoming connects unless it is stopped. */ | |
3191 | if ((!EQ (p->filter, Qt) && !EQ (p->command, Qt)) | |
3192 | || (EQ (p->status, Qlisten) && NILP (p->command))) | |
dd2a17ab KS |
3193 | { |
3194 | FD_SET (inch, &input_wait_mask); | |
3195 | FD_SET (inch, &non_keyboard_wait_mask); | |
3196 | } | |
3197 | ||
7d0e672e RS |
3198 | if (inch > max_process_desc) |
3199 | max_process_desc = inch; | |
d0d6b7c5 | 3200 | |
e690ca94 KS |
3201 | tem = Fplist_member (contact, QCcoding); |
3202 | if (!NILP (tem) && (!CONSP (tem) || !CONSP (XCDR (tem)))) | |
3203 | tem = Qnil; /* No error message (too late!). */ | |
3204 | ||
67918941 RS |
3205 | { |
3206 | /* Setup coding systems for communicating with the network stream. */ | |
3207 | struct gcpro gcpro1; | |
3208 | /* Qt denotes we have not yet called Ffind_operation_coding_system. */ | |
3209 | Lisp_Object coding_systems = Qt; | |
3210 | Lisp_Object args[5], val; | |
3211 | ||
e690ca94 KS |
3212 | if (!NILP (tem)) |
3213 | val = XCAR (XCDR (tem)); | |
3214 | else if (!NILP (Vcoding_system_for_read)) | |
67918941 | 3215 | val = Vcoding_system_for_read; |
41d03b9a GM |
3216 | else if ((!NILP (buffer) && NILP (XBUFFER (buffer)->enable_multibyte_characters)) |
3217 | || (NILP (buffer) && NILP (buffer_defaults.enable_multibyte_characters))) | |
67918941 RS |
3218 | /* We dare not decode end-of-line format by setting VAL to |
3219 | Qraw_text, because the existing Emacs Lisp libraries | |
3220 | assume that they receive bare code including a sequene of | |
3221 | CR LF. */ | |
3222 | val = Qnil; | |
3223 | else | |
3224 | { | |
3225 | args[0] = Qopen_network_stream, args[1] = name, | |
3226 | args[2] = buffer, args[3] = host, args[4] = service; | |
3227 | GCPRO1 (proc); | |
3228 | coding_systems = Ffind_operation_coding_system (5, args); | |
3229 | UNGCPRO; | |
3230 | if (CONSP (coding_systems)) | |
70949dac | 3231 | val = XCAR (coding_systems); |
67918941 | 3232 | else if (CONSP (Vdefault_process_coding_system)) |
70949dac | 3233 | val = XCAR (Vdefault_process_coding_system); |
67918941 RS |
3234 | else |
3235 | val = Qnil; | |
3236 | } | |
e690ca94 | 3237 | p->decode_coding_system = val; |
0fa1789e | 3238 | |
e690ca94 KS |
3239 | if (!NILP (tem)) |
3240 | val = XCAR (XCDR (tem)); | |
3241 | else if (!NILP (Vcoding_system_for_write)) | |
67918941 RS |
3242 | val = Vcoding_system_for_write; |
3243 | else if (NILP (current_buffer->enable_multibyte_characters)) | |
3244 | val = Qnil; | |
3245 | else | |
3246 | { | |
3247 | if (EQ (coding_systems, Qt)) | |
3248 | { | |
3249 | args[0] = Qopen_network_stream, args[1] = name, | |
3250 | args[2] = buffer, args[3] = host, args[4] = service; | |
3251 | GCPRO1 (proc); | |
3252 | coding_systems = Ffind_operation_coding_system (5, args); | |
3253 | UNGCPRO; | |
3254 | } | |
3255 | if (CONSP (coding_systems)) | |
70949dac | 3256 | val = XCDR (coding_systems); |
67918941 | 3257 | else if (CONSP (Vdefault_process_coding_system)) |
70949dac | 3258 | val = XCDR (Vdefault_process_coding_system); |
67918941 RS |
3259 | else |
3260 | val = Qnil; | |
3261 | } | |
e690ca94 | 3262 | p->encode_coding_system = val; |
67918941 | 3263 | } |
0fa1789e | 3264 | |
c7580538 KH |
3265 | if (!proc_decode_coding_system[inch]) |
3266 | proc_decode_coding_system[inch] | |
3267 | = (struct coding_system *) xmalloc (sizeof (struct coding_system)); | |
e690ca94 | 3268 | setup_coding_system (p->decode_coding_system, |
c7580538 KH |
3269 | proc_decode_coding_system[inch]); |
3270 | if (!proc_encode_coding_system[outch]) | |
3271 | proc_encode_coding_system[outch] | |
3272 | = (struct coding_system *) xmalloc (sizeof (struct coding_system)); | |
e690ca94 | 3273 | setup_coding_system (p->encode_coding_system, |
c7580538 | 3274 | proc_encode_coding_system[outch]); |
0fa1789e | 3275 | |
e690ca94 KS |
3276 | p->decoding_buf = make_uninit_string (0); |
3277 | p->decoding_carryover = make_number (0); | |
3278 | p->encoding_buf = make_uninit_string (0); | |
3279 | p->encoding_carryover = make_number (0); | |
0fa1789e | 3280 | |
e690ca94 KS |
3281 | p->inherit_coding_system_flag |
3282 | = (!NILP (tem) || NILP (buffer) || !inherit_process_coding_system | |
aa91317a | 3283 | ? Qnil : Qt); |
52a1b894 | 3284 | |
d0d6b7c5 JB |
3285 | UNGCPRO; |
3286 | return proc; | |
3287 | } | |
3288 | #endif /* HAVE_SOCKETS */ | |
3289 | ||
6b53bb85 | 3290 | void |
d0d6b7c5 JB |
3291 | deactivate_process (proc) |
3292 | Lisp_Object proc; | |
3293 | { | |
3294 | register int inchannel, outchannel; | |
3295 | register struct Lisp_Process *p = XPROCESS (proc); | |
3296 | ||
a9f2c884 RS |
3297 | inchannel = XINT (p->infd); |
3298 | outchannel = XINT (p->outfd); | |
d0d6b7c5 | 3299 | |
a9f2c884 | 3300 | if (inchannel >= 0) |
d0d6b7c5 JB |
3301 | { |
3302 | /* Beware SIGCHLD hereabouts. */ | |
3303 | flush_pending_output (inchannel); | |
3304 | #ifdef VMS | |
3305 | { | |
3306 | VMS_PROC_STUFF *get_vms_process_pointer (), *vs; | |
3307 | sys$dassgn (outchannel); | |
c6c6865d | 3308 | vs = get_vms_process_pointer (p->pid); |
d0d6b7c5 JB |
3309 | if (vs) |
3310 | give_back_vms_process_stuff (vs); | |
3311 | } | |
3312 | #else | |
68c45bf0 | 3313 | emacs_close (inchannel); |
a9f2c884 | 3314 | if (outchannel >= 0 && outchannel != inchannel) |
68c45bf0 | 3315 | emacs_close (outchannel); |
d0d6b7c5 JB |
3316 | #endif |
3317 | ||
1d056e64 KH |
3318 | XSETINT (p->infd, -1); |
3319 | XSETINT (p->outfd, -1); | |
e690ca94 KS |
3320 | #ifdef DATAGRAM_SOCKETS |
3321 | if (DATAGRAM_CHAN_P (inchannel)) | |
3322 | { | |
3323 | xfree (datagram_address[inchannel].sa); | |
3324 | datagram_address[inchannel].sa = 0; | |
3325 | datagram_address[inchannel].len = 0; | |
3326 | } | |
3327 | #endif | |
d0d6b7c5 JB |
3328 | chan_process[inchannel] = Qnil; |
3329 | FD_CLR (inchannel, &input_wait_mask); | |
a69281ff | 3330 | FD_CLR (inchannel, &non_keyboard_wait_mask); |
dd2a17ab KS |
3331 | if (FD_ISSET (inchannel, &connect_wait_mask)) |
3332 | { | |
3333 | FD_CLR (inchannel, &connect_wait_mask); | |
3334 | if (--num_pending_connects < 0) | |
3335 | abort (); | |
3336 | } | |
7d0e672e RS |
3337 | if (inchannel == max_process_desc) |
3338 | { | |
3339 | int i; | |
3340 | /* We just closed the highest-numbered process input descriptor, | |
3341 | so recompute the highest-numbered one now. */ | |
3342 | max_process_desc = 0; | |
3343 | for (i = 0; i < MAXDESC; i++) | |
3344 | if (!NILP (chan_process[i])) | |
3345 | max_process_desc = i; | |
3346 | } | |
d0d6b7c5 JB |
3347 | } |
3348 | } | |
3349 | ||
3350 | /* Close all descriptors currently in use for communication | |
3351 | with subprocess. This is used in a newly-forked subprocess | |
3352 | to get rid of irrelevant descriptors. */ | |
3353 | ||
6b53bb85 | 3354 | void |
d0d6b7c5 JB |
3355 | close_process_descs () |
3356 | { | |
e98d950b | 3357 | #ifndef WINDOWSNT |
d0d6b7c5 JB |
3358 | int i; |
3359 | for (i = 0; i < MAXDESC; i++) | |
3360 | { | |
3361 | Lisp_Object process; | |
3362 | process = chan_process[i]; | |
3363 | if (!NILP (process)) | |
3364 | { | |
a9f2c884 RS |
3365 | int in = XINT (XPROCESS (process)->infd); |
3366 | int out = XINT (XPROCESS (process)->outfd); | |
3367 | if (in >= 0) | |
68c45bf0 | 3368 | emacs_close (in); |
a9f2c884 | 3369 | if (out >= 0 && in != out) |
68c45bf0 | 3370 | emacs_close (out); |
d0d6b7c5 JB |
3371 | } |
3372 | } | |
e98d950b | 3373 | #endif |
d0d6b7c5 JB |
3374 | } |
3375 | \f | |
3376 | DEFUN ("accept-process-output", Faccept_process_output, Saccept_process_output, | |
fdb82f93 PJ |
3377 | 0, 3, 0, |
3378 | doc: /* Allow any pending output from subprocesses to be read by Emacs. | |
3379 | It is read into the process' buffers or given to their filter functions. | |
3380 | Non-nil arg PROCESS means do not return until some output has been received | |
3381 | from PROCESS. | |
3382 | Non-nil second arg TIMEOUT and third arg TIMEOUT-MSECS are number of | |
3383 | seconds and microseconds to wait; return after that much time whether | |
3384 | or not there is input. | |
3385 | Return non-nil iff we received any output before the timeout expired. */) | |
3386 | (process, timeout, timeout_msecs) | |
4ee3e309 | 3387 | register Lisp_Object process, timeout, timeout_msecs; |
d0d6b7c5 JB |
3388 | { |
3389 | int seconds; | |
3390 | int useconds; | |
3391 | ||
0748d150 | 3392 | if (! NILP (process)) |
b7826503 | 3393 | CHECK_PROCESS (process); |
0748d150 | 3394 | |
d0d6b7c5 JB |
3395 | if (! NILP (timeout_msecs)) |
3396 | { | |
b7826503 | 3397 | CHECK_NUMBER (timeout_msecs); |
d0d6b7c5 | 3398 | useconds = XINT (timeout_msecs); |
bcd69aea | 3399 | if (!INTEGERP (timeout)) |
1d056e64 | 3400 | XSETINT (timeout, 0); |
d0d6b7c5 JB |
3401 | |
3402 | { | |
3403 | int carry = useconds / 1000000; | |
3404 | ||
3405 | XSETINT (timeout, XINT (timeout) + carry); | |
3406 | useconds -= carry * 1000000; | |
3407 | ||
3408 | /* I think this clause is necessary because C doesn't | |
3409 | guarantee a particular rounding direction for negative | |
3410 | integers. */ | |
3411 | if (useconds < 0) | |
3412 | { | |
3413 | XSETINT (timeout, XINT (timeout) - 1); | |
3414 | useconds += 1000000; | |
3415 | } | |
3416 | } | |
3417 | } | |
de946e5a RS |
3418 | else |
3419 | useconds = 0; | |
d0d6b7c5 JB |
3420 | |
3421 | if (! NILP (timeout)) | |
3422 | { | |
b7826503 | 3423 | CHECK_NUMBER (timeout); |
d0d6b7c5 | 3424 | seconds = XINT (timeout); |
ada9a4fd | 3425 | if (seconds < 0 || (seconds == 0 && useconds == 0)) |
d0d6b7c5 JB |
3426 | seconds = -1; |
3427 | } | |
3428 | else | |
3429 | { | |
4ee3e309 | 3430 | if (NILP (process)) |
d0d6b7c5 JB |
3431 | seconds = -1; |
3432 | else | |
3433 | seconds = 0; | |
3434 | } | |
3435 | ||
4ee3e309 EN |
3436 | if (NILP (process)) |
3437 | XSETFASTINT (process, 0); | |
f76475ad | 3438 | |
d0d6b7c5 | 3439 | return |
4ee3e309 | 3440 | (wait_reading_process_input (seconds, useconds, process, 0) |
d0d6b7c5 JB |
3441 | ? Qt : Qnil); |
3442 | } | |
3443 | ||
e690ca94 KS |
3444 | /* Accept a connection for server process SERVER on CHANNEL. */ |
3445 | ||
3446 | static int connect_counter = 0; | |
3447 | ||
3448 | static void | |
3449 | server_accept_connection (server, channel) | |
3450 | Lisp_Object server; | |
3451 | int channel; | |
3452 | { | |
3453 | Lisp_Object proc, caller, name, buffer; | |
3454 | Lisp_Object contact, host, service; | |
3455 | struct Lisp_Process *ps= XPROCESS (server); | |
3456 | struct Lisp_Process *p; | |
3457 | int s; | |
3458 | union u_sockaddr { | |
3459 | struct sockaddr sa; | |
3460 | struct sockaddr_in in; | |
3461 | #ifdef HAVE_LOCAL_SOCKETS | |
3462 | struct sockaddr_un un; | |
3463 | #endif | |
3464 | } saddr; | |
3465 | int len = sizeof saddr; | |
3466 | ||
3467 | s = accept (channel, &saddr.sa, &len); | |
3468 | ||
3469 | if (s < 0) | |
3470 | { | |
3471 | int code = errno; | |
3472 | ||
3473 | if (code == EAGAIN) | |
3474 | return; | |
3475 | #ifdef EWOULDBLOCK | |
3476 | if (code == EWOULDBLOCK) | |
3477 | return; | |
3478 | #endif | |
3479 | ||
3480 | if (!NILP (ps->log)) | |
3481 | call3 (ps->log, server, Qnil, | |
3482 | concat3 (build_string ("accept failed with code"), | |
3483 | Fnumber_to_string (make_number (code)), | |
3484 | build_string ("\n"))); | |
3485 | return; | |
3486 | } | |
3487 | ||
3488 | connect_counter++; | |
3489 | ||
3490 | /* Setup a new process to handle the connection. */ | |
3491 | ||
3492 | /* Generate a unique identification of the caller, and build contact | |
3493 | information for this process. */ | |
3494 | host = Qt; | |
3495 | service = Qnil; | |
3496 | switch (saddr.sa.sa_family) | |
3497 | { | |
3498 | case AF_INET: | |
3499 | { | |
3500 | Lisp_Object args[5]; | |
3501 | unsigned char *ip = (unsigned char *)&saddr.in.sin_addr.s_addr; | |
3502 | args[0] = build_string ("%d.%d.%d.%d"); | |
3503 | args[1] = make_number (*ip++); | |
3504 | args[2] = make_number (*ip++); | |
3505 | args[3] = make_number (*ip++); | |
3506 | args[4] = make_number (*ip++); | |
3507 | host = Fformat (5, args); | |
3508 | service = make_number (ntohs (saddr.in.sin_port)); | |
3509 | ||
3510 | args[0] = build_string (" <%s:%d>"); | |
3511 | args[1] = host; | |
3512 | args[2] = service; | |
3513 | caller = Fformat (3, args); | |
3514 | } | |
3515 | break; | |
3516 | ||
3517 | #ifdef HAVE_LOCAL_SOCKETS | |
3518 | case AF_LOCAL: | |
3519 | #endif | |
3520 | default: | |
3521 | caller = Fnumber_to_string (make_number (connect_counter)); | |
3522 | caller = concat3 (build_string (" <*"), caller, build_string ("*>")); | |
3523 | break; | |
3524 | } | |
3525 | ||
3526 | /* Create a new buffer name for this process if it doesn't have a | |
3527 | filter. The new buffer name is based on the buffer name or | |
3528 | process name of the server process concatenated with the caller | |
3529 | identification. */ | |
3530 | ||
3531 | if (!NILP (ps->filter) && !EQ (ps->filter, Qt)) | |
3532 | buffer = Qnil; | |
3533 | else | |
3534 | { | |
3535 | buffer = ps->buffer; | |
3536 | if (!NILP (buffer)) | |
3537 | buffer = Fbuffer_name (buffer); | |
3538 | else | |
3539 | buffer = ps->name; | |
3540 | if (!NILP (buffer)) | |
3541 | { | |
3542 | buffer = concat2 (buffer, caller); | |
3543 | buffer = Fget_buffer_create (buffer); | |
3544 | } | |
3545 | } | |
3546 | ||
3547 | /* Generate a unique name for the new server process. Combine the | |
3548 | server process name with the caller identification. */ | |
3549 | ||
3550 | name = concat2 (ps->name, caller); | |
3551 | proc = make_process (name); | |
3552 | ||
3553 | chan_process[s] = proc; | |
3554 | ||
3555 | #ifdef O_NONBLOCK | |
3556 | fcntl (s, F_SETFL, O_NONBLOCK); | |
3557 | #else | |
3558 | #ifdef O_NDELAY | |
3559 | fcntl (s, F_SETFL, O_NDELAY); | |
3560 | #endif | |
3561 | #endif | |
3562 | ||
3563 | p = XPROCESS (proc); | |
3564 | ||
3565 | /* Build new contact information for this setup. */ | |
3566 | contact = Fcopy_sequence (ps->childp); | |
3567 | contact = Fplist_put (contact, QCserver, Qnil); | |
3568 | contact = Fplist_put (contact, QChost, host); | |
3569 | if (!NILP (service)) | |
3570 | contact = Fplist_put (contact, QCservice, service); | |
3571 | contact = Fplist_put (contact, QCremote, | |
3572 | conv_sockaddr_to_lisp (&saddr.sa, len)); | |
3573 | #ifdef HAVE_GETSOCKNAME | |
3574 | len = sizeof saddr; | |
3575 | if (getsockname (channel, &saddr.sa, &len) == 0) | |
3576 | contact = Fplist_put (contact, QClocal, | |
3577 | conv_sockaddr_to_lisp (&saddr.sa, len)); | |
3578 | #endif | |
3579 | ||
3580 | p->childp = contact; | |
3581 | p->buffer = buffer; | |
3582 | p->sentinel = ps->sentinel; | |
3583 | p->filter = ps->filter; | |
3584 | p->command = Qnil; | |
3585 | p->pid = Qnil; | |
3586 | XSETINT (p->infd, s); | |
3587 | XSETINT (p->outfd, s); | |
3588 | p->status = Qrun; | |
3589 | ||
3590 | /* Client processes for accepted connections are not stopped initially. */ | |
3591 | if (!EQ (p->filter, Qt)) | |
3592 | { | |
3593 | FD_SET (s, &input_wait_mask); | |
3594 | FD_SET (s, &non_keyboard_wait_mask); | |
3595 | } | |
3596 | ||
3597 | if (s > max_process_desc) | |
3598 | max_process_desc = s; | |
3599 | ||
3600 | /* Setup coding system for new process based on server process. | |
3601 | This seems to be the proper thing to do, as the coding system | |
3602 | of the new process should reflect the settings at the time the | |
3603 | server socket was opened; not the current settings. */ | |
3604 | ||
3605 | p->decode_coding_system = ps->decode_coding_system; | |
3606 | p->encode_coding_system = ps->encode_coding_system; | |
3607 | ||
3608 | if (!proc_decode_coding_system[s]) | |
3609 | proc_decode_coding_system[s] | |
3610 | = (struct coding_system *) xmalloc (sizeof (struct coding_system)); | |
3611 | setup_coding_system (p->decode_coding_system, | |
3612 | proc_decode_coding_system[s]); | |
3613 | if (!proc_encode_coding_system[s]) | |
3614 | proc_encode_coding_system[s] | |
3615 | = (struct coding_system *) xmalloc (sizeof (struct coding_system)); | |
3616 | setup_coding_system (p->encode_coding_system, | |
3617 | proc_encode_coding_system[s]); | |
3618 | ||
3619 | p->decoding_buf = make_uninit_string (0); | |
3620 | p->decoding_carryover = make_number (0); | |
3621 | p->encoding_buf = make_uninit_string (0); | |
3622 | p->encoding_carryover = make_number (0); | |
3623 | ||
3624 | p->inherit_coding_system_flag | |
3625 | = (NILP (buffer) ? Qnil : ps->inherit_coding_system_flag); | |
3626 | ||
3627 | if (!NILP (ps->log)) | |
3628 | call3 (ps->log, server, proc, | |
3629 | concat3 (build_string ("accept from "), | |
3630 | (STRINGP (host) ? host : build_string ("-")), | |
3631 | build_string ("\n"))); | |
3632 | ||
3633 | if (p->sentinel) | |
3634 | exec_sentinel (proc, | |
3635 | concat3 (build_string ("open from "), | |
3636 | (STRINGP (host) ? host : build_string ("-")), | |
3637 | build_string ("\n"))); | |
3638 | } | |
3639 | ||
d0d6b7c5 JB |
3640 | /* This variable is different from waiting_for_input in keyboard.c. |
3641 | It is used to communicate to a lisp process-filter/sentinel (via the | |
3642 | function Fwaiting_for_user_input_p below) whether emacs was waiting | |
3643 | for user-input when that process-filter was called. | |
3644 | waiting_for_input cannot be used as that is by definition 0 when | |
d430ee71 RS |
3645 | lisp code is being evalled. |
3646 | This is also used in record_asynch_buffer_change. | |
3647 | For that purpose, this must be 0 | |
3648 | when not inside wait_reading_process_input. */ | |
d0d6b7c5 JB |
3649 | static int waiting_for_user_input_p; |
3650 | ||
c573ae8e | 3651 | /* This is here so breakpoints can be put on it. */ |
dfcf069d | 3652 | static void |
c573ae8e RS |
3653 | wait_reading_process_input_1 () |
3654 | { | |
3655 | } | |
3656 | ||
d0d6b7c5 JB |
3657 | /* Read and dispose of subprocess output while waiting for timeout to |
3658 | elapse and/or keyboard input to be available. | |
3659 | ||
de6fd4b9 | 3660 | TIME_LIMIT is: |
d0d6b7c5 JB |
3661 | timeout in seconds, or |
3662 | zero for no limit, or | |
3663 | -1 means gobble data immediately available but don't wait for any. | |
3664 | ||
de6fd4b9 RS |
3665 | MICROSECS is: |
3666 | an additional duration to wait, measured in microseconds. | |
3667 | If this is nonzero and time_limit is 0, then the timeout | |
3668 | consists of MICROSECS only. | |
6e4f3667 | 3669 | |
de6fd4b9 | 3670 | READ_KBD is a lisp value: |
d0d6b7c5 JB |
3671 | 0 to ignore keyboard input, or |
3672 | 1 to return when input is available, or | |
84aa3ace | 3673 | -1 meaning caller will actually read the input, so don't throw to |
d0d6b7c5 | 3674 | the quit handler, or |
e6194ffc | 3675 | a cons cell, meaning wait until its car is non-nil |
de6fd4b9 | 3676 | (and gobble terminal input into the buffer if any arrives), or |
f76475ad JB |
3677 | a process object, meaning wait until something arrives from that |
3678 | process. The return value is true iff we read some input from | |
3679 | that process. | |
d0d6b7c5 | 3680 | |
de6fd4b9 | 3681 | DO_DISPLAY != 0 means redisplay should be done to show subprocess |
d0d6b7c5 JB |
3682 | output that arrives. |
3683 | ||
de6fd4b9 | 3684 | If READ_KBD is a pointer to a struct Lisp_Process, then the |
d0d6b7c5 JB |
3685 | function returns true iff we received input from that process |
3686 | before the timeout elapsed. | |
eb8c3be9 | 3687 | Otherwise, return true iff we received input from any process. */ |
d0d6b7c5 | 3688 | |
dfcf069d | 3689 | int |
d0d6b7c5 | 3690 | wait_reading_process_input (time_limit, microsecs, read_kbd, do_display) |
f76475ad JB |
3691 | int time_limit, microsecs; |
3692 | Lisp_Object read_kbd; | |
3693 | int do_display; | |
d0d6b7c5 | 3694 | { |
41d03b9a | 3695 | register int channel, nfds; |
d0d6b7c5 | 3696 | static SELECT_TYPE Available; |
dd2a17ab KS |
3697 | static SELECT_TYPE Connecting; |
3698 | int check_connect, no_avail; | |
d0d6b7c5 JB |
3699 | int xerrno; |
3700 | Lisp_Object proc; | |
41d03b9a | 3701 | EMACS_TIME timeout, end_time; |
a9f2c884 | 3702 | int wait_channel = -1; |
d0d6b7c5 JB |
3703 | struct Lisp_Process *wait_proc = 0; |
3704 | int got_some_input = 0; | |
f3fbd155 KR |
3705 | /* Either nil or a cons cell, the car of which is of interest and |
3706 | may be changed outside of this routine. */ | |
3707 | Lisp_Object wait_for_cell = Qnil; | |
d0d6b7c5 JB |
3708 | |
3709 | FD_ZERO (&Available); | |
dd2a17ab | 3710 | FD_ZERO (&Connecting); |
d0d6b7c5 | 3711 | |
f76475ad JB |
3712 | /* If read_kbd is a process to watch, set wait_proc and wait_channel |
3713 | accordingly. */ | |
bcd69aea | 3714 | if (PROCESSP (read_kbd)) |
d0d6b7c5 | 3715 | { |
f76475ad | 3716 | wait_proc = XPROCESS (read_kbd); |
a9f2c884 | 3717 | wait_channel = XINT (wait_proc->infd); |
22719df2 | 3718 | XSETFASTINT (read_kbd, 0); |
d0d6b7c5 JB |
3719 | } |
3720 | ||
84aa3ace | 3721 | /* If waiting for non-nil in a cell, record where. */ |
bcd69aea | 3722 | if (CONSP (read_kbd)) |
84aa3ace | 3723 | { |
f3fbd155 | 3724 | wait_for_cell = read_kbd; |
22719df2 | 3725 | XSETFASTINT (read_kbd, 0); |
84aa3ace RS |
3726 | } |
3727 | ||
f76475ad | 3728 | waiting_for_user_input_p = XINT (read_kbd); |
d0d6b7c5 JB |
3729 | |
3730 | /* Since we may need to wait several times, | |
3731 | compute the absolute time to return at. */ | |
3732 | if (time_limit || microsecs) | |
3733 | { | |
3734 | EMACS_GET_TIME (end_time); | |
3735 | EMACS_SET_SECS_USECS (timeout, time_limit, microsecs); | |
3736 | EMACS_ADD_TIME (end_time, end_time, timeout); | |
3737 | } | |
e07d5449 KH |
3738 | #ifdef hpux |
3739 | /* AlainF 5-Jul-1996 | |
3740 | HP-UX 10.10 seem to have problems with signals coming in | |
3741 | Causes "poll: interrupted system call" messages when Emacs is run | |
3742 | in an X window | |
3743 | Turn off periodic alarms (in case they are in use) */ | |
30904ab7 | 3744 | turn_on_atimers (0); |
e07d5449 | 3745 | #endif |
d0d6b7c5 | 3746 | |
d0d6b7c5 JB |
3747 | while (1) |
3748 | { | |
c0239a0b RS |
3749 | int timeout_reduced_for_timers = 0; |
3750 | ||
d0d6b7c5 JB |
3751 | /* If calling from keyboard input, do not quit |
3752 | since we want to return C-g as an input character. | |
3753 | Otherwise, do pending quit if requested. */ | |
f76475ad | 3754 | if (XINT (read_kbd) >= 0) |
d0d6b7c5 JB |
3755 | QUIT; |
3756 | ||
889255b4 | 3757 | /* Exit now if the cell we're waiting for became non-nil. */ |
f3fbd155 | 3758 | if (! NILP (wait_for_cell) && ! NILP (XCAR (wait_for_cell))) |
889255b4 RS |
3759 | break; |
3760 | ||
d0d6b7c5 JB |
3761 | /* Compute time from now till when time limit is up */ |
3762 | /* Exit if already run out */ | |
3763 | if (time_limit == -1) | |
3764 | { | |
3765 | /* -1 specified for timeout means | |
3766 | gobble output available now | |
3767 | but don't wait at all. */ | |
3768 | ||
3769 | EMACS_SET_SECS_USECS (timeout, 0, 0); | |
3770 | } | |
3771 | else if (time_limit || microsecs) | |
3772 | { | |
3773 | EMACS_GET_TIME (timeout); | |
3774 | EMACS_SUB_TIME (timeout, end_time, timeout); | |
3775 | if (EMACS_TIME_NEG_P (timeout)) | |
3776 | break; | |
3777 | } | |
3778 | else | |
3779 | { | |
3780 | EMACS_SET_SECS_USECS (timeout, 100000, 0); | |
3781 | } | |
3782 | ||
f854a00b RS |
3783 | /* Normally we run timers here. |
3784 | But not if wait_for_cell; in those cases, | |
3785 | the wait is supposed to be short, | |
3786 | and those callers cannot handle running arbitrary Lisp code here. */ | |
f3fbd155 | 3787 | if (NILP (wait_for_cell)) |
fb4c3627 | 3788 | { |
c0239a0b | 3789 | EMACS_TIME timer_delay; |
c573ae8e | 3790 | |
9baacf76 | 3791 | do |
c573ae8e | 3792 | { |
9baacf76 | 3793 | int old_timers_run = timers_run; |
c88164fe | 3794 | struct buffer *old_buffer = current_buffer; |
a2fab450 | 3795 | |
9baacf76 | 3796 | timer_delay = timer_check (1); |
a2fab450 GM |
3797 | |
3798 | /* If a timer has run, this might have changed buffers | |
3799 | an alike. Make read_key_sequence aware of that. */ | |
3800 | if (timers_run != old_timers_run | |
c88164fe | 3801 | && old_buffer != current_buffer |
a2fab450 GM |
3802 | && waiting_for_user_input_p == -1) |
3803 | record_asynch_buffer_change (); | |
3804 | ||
9baacf76 GM |
3805 | if (timers_run != old_timers_run && do_display) |
3806 | /* We must retry, since a timer may have requeued itself | |
3807 | and that could alter the time_delay. */ | |
3007ebfb | 3808 | redisplay_preserve_echo_area (9); |
9baacf76 GM |
3809 | else |
3810 | break; | |
c573ae8e | 3811 | } |
9baacf76 | 3812 | while (!detect_input_pending ()); |
c573ae8e | 3813 | |
69645afc RS |
3814 | /* If there is unread keyboard input, also return. */ |
3815 | if (XINT (read_kbd) != 0 | |
3816 | && requeued_events_pending_p ()) | |
3817 | break; | |
3818 | ||
c0239a0b | 3819 | if (! EMACS_TIME_NEG_P (timer_delay) && time_limit != -1) |
fb4c3627 RS |
3820 | { |
3821 | EMACS_TIME difference; | |
3822 | EMACS_SUB_TIME (difference, timer_delay, timeout); | |
3823 | if (EMACS_TIME_NEG_P (difference)) | |
c0239a0b RS |
3824 | { |
3825 | timeout = timer_delay; | |
3826 | timeout_reduced_for_timers = 1; | |
3827 | } | |
fb4c3627 | 3828 | } |
4abca5e7 RS |
3829 | /* If time_limit is -1, we are not going to wait at all. */ |
3830 | else if (time_limit != -1) | |
c573ae8e RS |
3831 | { |
3832 | /* This is so a breakpoint can be put here. */ | |
3833 | wait_reading_process_input_1 (); | |
3834 | } | |
fb4c3627 RS |
3835 | } |
3836 | ||
90ab1a81 JB |
3837 | /* Cause C-g and alarm signals to take immediate action, |
3838 | and cause input available signals to zero out timeout. | |
3839 | ||
3840 | It is important that we do this before checking for process | |
3841 | activity. If we get a SIGCHLD after the explicit checks for | |
3842 | process activity, timeout is the only way we will know. */ | |
3843 | if (XINT (read_kbd) < 0) | |
3844 | set_waiting_for_input (&timeout); | |
3845 | ||
6be429b1 JB |
3846 | /* If status of something has changed, and no input is |
3847 | available, notify the user of the change right away. After | |
3848 | this explicit check, we'll let the SIGCHLD handler zap | |
3849 | timeout to get our attention. */ | |
3850 | if (update_tick != process_tick && do_display) | |
3851 | { | |
dd2a17ab KS |
3852 | SELECT_TYPE Atemp, Ctemp; |
3853 | ||
6be429b1 | 3854 | Atemp = input_wait_mask; |
dd2a17ab | 3855 | Ctemp = connect_wait_mask; |
6be429b1 | 3856 | EMACS_SET_SECS_USECS (timeout, 0, 0); |
0c9960e9 | 3857 | if ((select (max (max_process_desc, max_keyboard_desc) + 1, |
dd2a17ab KS |
3858 | &Atemp, |
3859 | (num_pending_connects > 0 ? &Ctemp : (SELECT_TYPE *)0), | |
3860 | (SELECT_TYPE *)0, &timeout) | |
ecd1f654 | 3861 | <= 0)) |
90ab1a81 JB |
3862 | { |
3863 | /* It's okay for us to do this and then continue with | |
a0e4d3f3 | 3864 | the loop, since timeout has already been zeroed out. */ |
90ab1a81 JB |
3865 | clear_waiting_for_input (); |
3866 | status_notify (); | |
3867 | } | |
6be429b1 JB |
3868 | } |
3869 | ||
dd2a17ab KS |
3870 | /* Don't wait for output from a non-running process. Just |
3871 | read whatever data has already been received. */ | |
6be429b1 JB |
3872 | if (wait_proc != 0 && !NILP (wait_proc->raw_status_low)) |
3873 | update_status (wait_proc); | |
3874 | if (wait_proc != 0 | |
dd2a17ab KS |
3875 | && ! EQ (wait_proc->status, Qrun) |
3876 | && ! EQ (wait_proc->status, Qconnect)) | |
9aa2a7f4 | 3877 | { |
215b45e9 | 3878 | int nread, total_nread = 0; |
7ce63188 | 3879 | |
9aa2a7f4 | 3880 | clear_waiting_for_input (); |
7ce63188 RS |
3881 | XSETPROCESS (proc, wait_proc); |
3882 | ||
3883 | /* Read data from the process, until we exhaust it. */ | |
e1b37c34 | 3884 | while (XINT (wait_proc->infd) >= 0) |
215b45e9 | 3885 | { |
e1b37c34 GM |
3886 | nread = read_process_output (proc, XINT (wait_proc->infd)); |
3887 | ||
3888 | if (nread == 0) | |
3889 | break; | |
3890 | ||
215b45e9 RS |
3891 | if (0 < nread) |
3892 | total_nread += nread; | |
3893 | #ifdef EIO | |
3894 | else if (nread == -1 && EIO == errno) | |
3895 | break; | |
e1b37c34 GM |
3896 | #endif |
3897 | #ifdef EAGAIN | |
3898 | else if (nread == -1 && EAGAIN == errno) | |
3899 | break; | |
3900 | #endif | |
3901 | #ifdef EWOULDBLOCK | |
3902 | else if (nread == -1 && EWOULDBLOCK == errno) | |
3903 | break; | |
215b45e9 RS |
3904 | #endif |
3905 | } | |
7ce63188 | 3906 | if (total_nread > 0 && do_display) |
3007ebfb | 3907 | redisplay_preserve_echo_area (10); |
7ce63188 | 3908 | |
9aa2a7f4 JB |
3909 | break; |
3910 | } | |
6be429b1 | 3911 | |
d0d6b7c5 JB |
3912 | /* Wait till there is something to do */ |
3913 | ||
f3fbd155 | 3914 | if (!NILP (wait_for_cell)) |
dd2a17ab KS |
3915 | { |
3916 | Available = non_process_wait_mask; | |
3917 | check_connect = 0; | |
3918 | } | |
a69281ff | 3919 | else |
dd2a17ab KS |
3920 | { |
3921 | if (! XINT (read_kbd)) | |
3922 | Available = non_keyboard_wait_mask; | |
3923 | else | |
3924 | Available = input_wait_mask; | |
3925 | check_connect = (num_pending_connects > 0); | |
3926 | } | |
d0d6b7c5 | 3927 | |
ff11dfa1 | 3928 | /* If frame size has changed or the window is newly mapped, |
ffd56f97 JB |
3929 | redisplay now, before we start to wait. There is a race |
3930 | condition here; if a SIGIO arrives between now and the select | |
016899c0 JB |
3931 | and indicates that a frame is trashed, the select may block |
3932 | displaying a trashed screen. */ | |
5164ee8e | 3933 | if (frame_garbaged && do_display) |
7286affd RS |
3934 | { |
3935 | clear_waiting_for_input (); | |
3007ebfb | 3936 | redisplay_preserve_echo_area (11); |
7286affd | 3937 | if (XINT (read_kbd) < 0) |
7efe788e | 3938 | set_waiting_for_input (&timeout); |
7286affd | 3939 | } |
ffd56f97 | 3940 | |
dd2a17ab | 3941 | no_avail = 0; |
0a65b032 RS |
3942 | if (XINT (read_kbd) && detect_input_pending ()) |
3943 | { | |
3944 | nfds = 0; | |
dd2a17ab | 3945 | no_avail = 1; |
0a65b032 RS |
3946 | } |
3947 | else | |
dd2a17ab KS |
3948 | { |
3949 | if (check_connect) | |
3950 | Connecting = connect_wait_mask; | |
3951 | nfds = select (max (max_process_desc, max_keyboard_desc) + 1, | |
3952 | &Available, | |
3953 | (check_connect ? &Connecting : (SELECT_TYPE *)0), | |
3954 | (SELECT_TYPE *)0, &timeout); | |
3955 | } | |
6720a7fb | 3956 | |
d0d6b7c5 JB |
3957 | xerrno = errno; |
3958 | ||
3959 | /* Make C-g and alarm signals set flags again */ | |
3960 | clear_waiting_for_input (); | |
3961 | ||
3962 | /* If we woke up due to SIGWINCH, actually change size now. */ | |
2b653806 | 3963 | do_pending_window_change (0); |
d0d6b7c5 | 3964 | |
c0239a0b RS |
3965 | if (time_limit && nfds == 0 && ! timeout_reduced_for_timers) |
3966 | /* We wanted the full specified time, so return now. */ | |
d0d6b7c5 JB |
3967 | break; |
3968 | if (nfds < 0) | |
3969 | { | |
3970 | if (xerrno == EINTR) | |
dd2a17ab | 3971 | no_avail = 1; |
b0310da4 JB |
3972 | #ifdef ultrix |
3973 | /* Ultrix select seems to return ENOMEM when it is | |
3974 | interrupted. Treat it just like EINTR. Bleah. Note | |
3975 | that we want to test for the "ultrix" CPP symbol, not | |
3976 | "__ultrix__"; the latter is only defined under GCC, but | |
3977 | not by DEC's bundled CC. -JimB */ | |
8058415c | 3978 | else if (xerrno == ENOMEM) |
dd2a17ab | 3979 | no_avail = 1; |
8058415c | 3980 | #endif |
d0d6b7c5 JB |
3981 | #ifdef ALLIANT |
3982 | /* This happens for no known reason on ALLIANT. | |
3983 | I am guessing that this is the right response. -- RMS. */ | |
3984 | else if (xerrno == EFAULT) | |
dd2a17ab | 3985 | no_avail = 1; |
d0d6b7c5 JB |
3986 | #endif |
3987 | else if (xerrno == EBADF) | |
3988 | { | |
3989 | #ifdef AIX | |
3990 | /* AIX doesn't handle PTY closure the same way BSD does. On AIX, | |
3991 | the child's closure of the pts gives the parent a SIGHUP, and | |
3992 | the ptc file descriptor is automatically closed, | |
3993 | yielding EBADF here or at select() call above. | |
3994 | So, SIGHUP is ignored (see def of PTY_TTY_NAME_SPRINTF | |
a0e4d3f3 | 3995 | in m/ibmrt-aix.h), and here we just ignore the select error. |
d0d6b7c5 | 3996 | Cleanup occurs c/o status_notify after SIGCLD. */ |
dd2a17ab | 3997 | no_avail = 1; /* Cannot depend on values returned */ |
d0d6b7c5 JB |
3998 | #else |
3999 | abort (); | |
4000 | #endif | |
4001 | } | |
4002 | else | |
68c45bf0 | 4003 | error ("select error: %s", emacs_strerror (xerrno)); |
d0d6b7c5 | 4004 | } |
dd2a17ab KS |
4005 | |
4006 | if (no_avail) | |
4007 | { | |
4008 | FD_ZERO (&Available); | |
4009 | check_connect = 0; | |
4010 | } | |
4011 | ||
26ec91de | 4012 | #if defined(sun) && !defined(USG5_4) |
dd2a17ab KS |
4013 | if (nfds > 0 && keyboard_bit_set (&Available) |
4014 | && interrupt_input) | |
e0109153 JB |
4015 | /* System sometimes fails to deliver SIGIO. |
4016 | ||
4017 | David J. Mackenzie says that Emacs doesn't compile under | |
4018 | Solaris if this code is enabled, thus the USG5_4 in the CPP | |
4019 | conditional. "I haven't noticed any ill effects so far. | |
4020 | If you find a Solaris expert somewhere, they might know | |
4021 | better." */ | |
d0d6b7c5 JB |
4022 | kill (getpid (), SIGIO); |
4023 | #endif | |
4024 | ||
5d5beb62 RS |
4025 | #if 0 /* When polling is used, interrupt_input is 0, |
4026 | so get_input_pending should read the input. | |
4027 | So this should not be needed. */ | |
4028 | /* If we are using polling for input, | |
4029 | and we see input available, make it get read now. | |
4030 | Otherwise it might not actually get read for a second. | |
4031 | And on hpux, since we turn off polling in wait_reading_process_input, | |
4032 | it might never get read at all if we don't spend much time | |
4033 | outside of wait_reading_process_input. */ | |
4034 | if (XINT (read_kbd) && interrupt_input | |
4035 | && keyboard_bit_set (&Available) | |
4036 | && input_polling_used ()) | |
4037 | kill (getpid (), SIGALRM); | |
4038 | #endif | |
4039 | ||
d0d6b7c5 JB |
4040 | /* Check for keyboard input */ |
4041 | /* If there is any, return immediately | |
4042 | to give it higher priority than subprocesses */ | |
4043 | ||
a2fab450 | 4044 | if (XINT (read_kbd) != 0) |
6ed6233b | 4045 | { |
a2fab450 | 4046 | int old_timers_run = timers_run; |
c88164fe | 4047 | struct buffer *old_buffer = current_buffer; |
a2fab450 GM |
4048 | int leave = 0; |
4049 | ||
5d6c2aa3 | 4050 | if (detect_input_pending_run_timers (do_display)) |
a2fab450 GM |
4051 | { |
4052 | swallow_events (do_display); | |
4053 | if (detect_input_pending_run_timers (do_display)) | |
4054 | leave = 1; | |
4055 | } | |
6ed6233b | 4056 | |
a2fab450 GM |
4057 | /* If a timer has run, this might have changed buffers |
4058 | an alike. Make read_key_sequence aware of that. */ | |
4059 | if (timers_run != old_timers_run | |
c88164fe GM |
4060 | && waiting_for_user_input_p == -1 |
4061 | && old_buffer != current_buffer) | |
a2fab450 GM |
4062 | record_asynch_buffer_change (); |
4063 | ||
4064 | if (leave) | |
4065 | break; | |
4066 | } | |
4067 | ||
69645afc RS |
4068 | /* If there is unread keyboard input, also return. */ |
4069 | if (XINT (read_kbd) != 0 | |
4070 | && requeued_events_pending_p ()) | |
4071 | break; | |
4072 | ||
77e1b3d4 RS |
4073 | /* If we are not checking for keyboard input now, |
4074 | do process events (but don't run any timers). | |
4075 | This is so that X events will be processed. | |
0c9960e9 | 4076 | Otherwise they may have to wait until polling takes place. |
77e1b3d4 RS |
4077 | That would causes delays in pasting selections, for example. |
4078 | ||
4079 | (We used to do this only if wait_for_cell.) */ | |
4080 | if (XINT (read_kbd) == 0 && detect_input_pending ()) | |
f854a00b RS |
4081 | { |
4082 | swallow_events (do_display); | |
0c9960e9 | 4083 | #if 0 /* Exiting when read_kbd doesn't request that seems wrong, though. */ |
f854a00b RS |
4084 | if (detect_input_pending ()) |
4085 | break; | |
5d5beb62 | 4086 | #endif |
0c9960e9 | 4087 | } |
f854a00b | 4088 | |
84aa3ace | 4089 | /* Exit now if the cell we're waiting for became non-nil. */ |
f3fbd155 | 4090 | if (! NILP (wait_for_cell) && ! NILP (XCAR (wait_for_cell))) |
84aa3ace RS |
4091 | break; |
4092 | ||
4746118a | 4093 | #ifdef SIGIO |
5d5beb62 | 4094 | /* If we think we have keyboard input waiting, but didn't get SIGIO, |
d0d6b7c5 JB |
4095 | go read it. This can happen with X on BSD after logging out. |
4096 | In that case, there really is no input and no SIGIO, | |
4097 | but select says there is input. */ | |
4098 | ||
dd2281ae | 4099 | if (XINT (read_kbd) && interrupt_input |
5d5beb62 | 4100 | && keyboard_bit_set (&Available)) |
e643c5be | 4101 | kill (getpid (), SIGIO); |
4746118a | 4102 | #endif |
d0d6b7c5 | 4103 | |
d0d6b7c5 JB |
4104 | if (! wait_proc) |
4105 | got_some_input |= nfds > 0; | |
4106 | ||
32676c08 JB |
4107 | /* If checking input just got us a size-change event from X, |
4108 | obey it now if we should. */ | |
f3fbd155 | 4109 | if (XINT (read_kbd) || ! NILP (wait_for_cell)) |
2b653806 | 4110 | do_pending_window_change (0); |
32676c08 | 4111 | |
a9f2c884 | 4112 | /* Check for data from a process. */ |
dd2a17ab KS |
4113 | if (no_avail || nfds == 0) |
4114 | continue; | |
4115 | ||
a9f2c884 RS |
4116 | /* Really FIRST_PROC_DESC should be 0 on Unix, |
4117 | but this is safer in the short run. */ | |
a69281ff | 4118 | for (channel = 0; channel <= max_process_desc; channel++) |
d0d6b7c5 | 4119 | { |
a69281ff RS |
4120 | if (FD_ISSET (channel, &Available) |
4121 | && FD_ISSET (channel, &non_keyboard_wait_mask)) | |
d0d6b7c5 JB |
4122 | { |
4123 | int nread; | |
4124 | ||
4125 | /* If waiting for this channel, arrange to return as | |
4126 | soon as no more input to be processed. No more | |
4127 | waiting. */ | |
4128 | if (wait_channel == channel) | |
4129 | { | |
a9f2c884 | 4130 | wait_channel = -1; |
d0d6b7c5 JB |
4131 | time_limit = -1; |
4132 | got_some_input = 1; | |
4133 | } | |
4134 | proc = chan_process[channel]; | |
4135 | if (NILP (proc)) | |
4136 | continue; | |
4137 | ||
e690ca94 KS |
4138 | /* If this is a server stream socket, accept connection. */ |
4139 | if (EQ (XPROCESS (proc)->status, Qlisten)) | |
4140 | { | |
4141 | server_accept_connection (proc, channel); | |
4142 | continue; | |
4143 | } | |
4144 | ||
d0d6b7c5 JB |
4145 | /* Read data from the process, starting with our |
4146 | buffered-ahead character if we have one. */ | |
4147 | ||
4148 | nread = read_process_output (proc, channel); | |
4149 | if (nread > 0) | |
4150 | { | |
4151 | /* Since read_process_output can run a filter, | |
4152 | which can call accept-process-output, | |
4153 | don't try to read from any other processes | |
4154 | before doing the select again. */ | |
4155 | FD_ZERO (&Available); | |
4156 | ||
4157 | if (do_display) | |
3007ebfb | 4158 | redisplay_preserve_echo_area (12); |
d0d6b7c5 JB |
4159 | } |
4160 | #ifdef EWOULDBLOCK | |
4161 | else if (nread == -1 && errno == EWOULDBLOCK) | |
4162 | ; | |
0b75e9a4 | 4163 | #endif |
89d7280d RS |
4164 | /* ISC 4.1 defines both EWOULDBLOCK and O_NONBLOCK, |
4165 | and Emacs uses O_NONBLOCK, so what we get is EAGAIN. */ | |
d0d6b7c5 JB |
4166 | #ifdef O_NONBLOCK |
4167 | else if (nread == -1 && errno == EAGAIN) | |
4168 | ; | |
4169 | #else | |
4170 | #ifdef O_NDELAY | |
4171 | else if (nread == -1 && errno == EAGAIN) | |
4172 | ; | |
4173 | /* Note that we cannot distinguish between no input | |
4174 | available now and a closed pipe. | |
4175 | With luck, a closed pipe will be accompanied by | |
4176 | subprocess termination and SIGCHLD. */ | |
4177 | else if (nread == 0 && !NETCONN_P (proc)) | |
4178 | ; | |
ffd56f97 JB |
4179 | #endif /* O_NDELAY */ |
4180 | #endif /* O_NONBLOCK */ | |
d0d6b7c5 JB |
4181 | #ifdef HAVE_PTYS |
4182 | /* On some OSs with ptys, when the process on one end of | |
4183 | a pty exits, the other end gets an error reading with | |
4184 | errno = EIO instead of getting an EOF (0 bytes read). | |
4185 | Therefore, if we get an error reading and errno = | |
4186 | EIO, just continue, because the child process has | |
4187 | exited and should clean itself up soon (e.g. when we | |
5651af6d RS |
4188 | get a SIGCHLD). |
4189 | ||
4190 | However, it has been known to happen that the SIGCHLD | |
4191 | got lost. So raise the signl again just in case. | |
4192 | It can't hurt. */ | |
d0d6b7c5 | 4193 | else if (nread == -1 && errno == EIO) |
5651af6d | 4194 | kill (getpid (), SIGCHLD); |
ffd56f97 JB |
4195 | #endif /* HAVE_PTYS */ |
4196 | /* If we can detect process termination, don't consider the process | |
4197 | gone just because its pipe is closed. */ | |
d0d6b7c5 JB |
4198 | #ifdef SIGCHLD |
4199 | else if (nread == 0 && !NETCONN_P (proc)) | |
4200 | ; | |
4201 | #endif | |
4202 | else | |
4203 | { | |
4204 | /* Preserve status of processes already terminated. */ | |
4205 | XSETINT (XPROCESS (proc)->tick, ++process_tick); | |
4206 | deactivate_process (proc); | |
4207 | if (!NILP (XPROCESS (proc)->raw_status_low)) | |
4208 | update_status (XPROCESS (proc)); | |
4209 | if (EQ (XPROCESS (proc)->status, Qrun)) | |
4210 | XPROCESS (proc)->status | |
4211 | = Fcons (Qexit, Fcons (make_number (256), Qnil)); | |
4212 | } | |
4213 | } | |
dd2a17ab KS |
4214 | #ifdef NON_BLOCKING_CONNECT |
4215 | if (check_connect && FD_ISSET (channel, &Connecting)) | |
4216 | { | |
4217 | struct Lisp_Process *p; | |
4218 | struct sockaddr pname; | |
e690ca94 | 4219 | int pnamelen = sizeof(pname); |
dd2a17ab KS |
4220 | |
4221 | FD_CLR (channel, &connect_wait_mask); | |
4222 | if (--num_pending_connects < 0) | |
4223 | abort (); | |
4224 | ||
4225 | proc = chan_process[channel]; | |
4226 | if (NILP (proc)) | |
4227 | continue; | |
4228 | ||
4229 | p = XPROCESS (proc); | |
4230 | ||
4231 | #ifdef GNU_LINUX | |
4232 | /* getsockopt(,,SO_ERROR,,) is said to hang on some systems. | |
4233 | So only use it on systems where it is known to work. */ | |
4234 | { | |
e690ca94 | 4235 | int xlen = sizeof(xerrno); |
dd2a17ab KS |
4236 | if (getsockopt(channel, SOL_SOCKET, SO_ERROR, &xerrno, &xlen)) |
4237 | xerrno = errno; | |
4238 | } | |
4239 | #else | |
4240 | /* If connection failed, getpeername will fail. */ | |
4241 | xerrno = 0; | |
4242 | if (getpeername(channel, &pname, &pnamelen) < 0) | |
4243 | { | |
4244 | /* Obtain connect failure code through error slippage. */ | |
4245 | char dummy; | |
4246 | xerrno = errno; | |
4247 | if (errno == ENOTCONN && read(channel, &dummy, 1) < 0) | |
4248 | xerrno = errno; | |
4249 | } | |
4250 | #endif | |
4251 | if (xerrno) | |
4252 | { | |
4253 | XSETINT (p->tick, ++process_tick); | |
4254 | p->status = Fcons (Qfailed, Fcons (make_number (xerrno), Qnil)); | |
4255 | deactivate_process (proc); | |
4256 | } | |
4257 | else | |
4258 | { | |
4259 | p->status = Qrun; | |
4260 | /* Execute the sentinel here. If we had relied on | |
4261 | status_notify to do it later, it will read input | |
4262 | from the process before calling the sentinel. */ | |
4263 | exec_sentinel (proc, build_string ("open\n")); | |
e690ca94 | 4264 | if (!EQ (p->filter, Qt) && !EQ (p->command, Qt)) |
dd2a17ab KS |
4265 | { |
4266 | FD_SET (XINT (p->infd), &input_wait_mask); | |
4267 | FD_SET (XINT (p->infd), &non_keyboard_wait_mask); | |
4268 | } | |
4269 | } | |
4270 | } | |
4271 | #endif /* NON_BLOCKING_CONNECT */ | |
ffd56f97 JB |
4272 | } /* end for each file descriptor */ |
4273 | } /* end while exit conditions not met */ | |
d0d6b7c5 | 4274 | |
d430ee71 RS |
4275 | waiting_for_user_input_p = 0; |
4276 | ||
ffd56f97 JB |
4277 | /* If calling from keyboard input, do not quit |
4278 | since we want to return C-g as an input character. | |
4279 | Otherwise, do pending quit if requested. */ | |
f76475ad | 4280 | if (XINT (read_kbd) >= 0) |
ffd56f97 JB |
4281 | { |
4282 | /* Prevent input_pending from remaining set if we quit. */ | |
4283 | clear_input_pending (); | |
4284 | QUIT; | |
4285 | } | |
e07d5449 KH |
4286 | #ifdef hpux |
4287 | /* AlainF 5-Jul-1996 | |
4288 | HP-UX 10.10 seems to have problems with signals coming in | |
4289 | Causes "poll: interrupted system call" messages when Emacs is run | |
4290 | in an X window | |
4291 | Turn periodic alarms back on */ | |
5d5beb62 | 4292 | start_polling (); |
e07d5449 | 4293 | #endif |
efa2a55c | 4294 | |
d0d6b7c5 JB |
4295 | return got_some_input; |
4296 | } | |
4297 | \f | |
3b9a3dfa RS |
4298 | /* Given a list (FUNCTION ARGS...), apply FUNCTION to the ARGS. */ |
4299 | ||
4300 | static Lisp_Object | |
4301 | read_process_output_call (fun_and_args) | |
4302 | Lisp_Object fun_and_args; | |
4303 | { | |
70949dac | 4304 | return apply1 (XCAR (fun_and_args), XCDR (fun_and_args)); |
3b9a3dfa RS |
4305 | } |
4306 | ||
4307 | static Lisp_Object | |
4308 | read_process_output_error_handler (error) | |
4309 | Lisp_Object error; | |
4310 | { | |
4311 | cmd_error_internal (error, "error in process filter: "); | |
4312 | Vinhibit_quit = Qt; | |
4313 | update_echo_area (); | |
833ba342 | 4314 | Fsleep_for (make_number (2), Qnil); |
8c983bf2 | 4315 | return Qt; |
3b9a3dfa RS |
4316 | } |
4317 | ||
d0d6b7c5 JB |
4318 | /* Read pending output from the process channel, |
4319 | starting with our buffered-ahead character if we have one. | |
0fa1789e | 4320 | Yield number of decoded characters read. |
d0d6b7c5 JB |
4321 | |
4322 | This function reads at most 1024 characters. | |
4323 | If you want to read all available subprocess output, | |
0fa1789e KH |
4324 | you must call it repeatedly until it returns zero. |
4325 | ||
4326 | The characters read are decoded according to PROC's coding-system | |
4327 | for decoding. */ | |
d0d6b7c5 | 4328 | |
dfcf069d | 4329 | int |
d0d6b7c5 JB |
4330 | read_process_output (proc, channel) |
4331 | Lisp_Object proc; | |
4332 | register int channel; | |
4333 | { | |
1d2fc612 | 4334 | register int nchars, nbytes; |
d0d6b7c5 | 4335 | char *chars; |
d0d6b7c5 JB |
4336 | register Lisp_Object outstream; |
4337 | register struct buffer *old = current_buffer; | |
4338 | register struct Lisp_Process *p = XPROCESS (proc); | |
4339 | register int opoint; | |
c7580538 | 4340 | struct coding_system *coding = proc_decode_coding_system[channel]; |
e7fbaa65 | 4341 | int carryover = XINT (p->decoding_carryover); |
e690ca94 | 4342 | int readmax = 1024; |
d0d6b7c5 JB |
4343 | |
4344 | #ifdef VMS | |
4345 | VMS_PROC_STUFF *vs, *get_vms_process_pointer(); | |
4346 | ||
4347 | vs = get_vms_process_pointer (p->pid); | |
4348 | if (vs) | |
4349 | { | |
4350 | if (!vs->iosb[0]) | |
a319f7c1 | 4351 | return (0); /* Really weird if it does this */ |
d0d6b7c5 JB |
4352 | if (!(vs->iosb[0] & 1)) |
4353 | return -1; /* I/O error */ | |
4354 | } | |
4355 | else | |
4356 | error ("Could not get VMS process pointer"); | |
4357 | chars = vs->inputBuffer; | |
1d2fc612 RS |
4358 | nbytes = clean_vms_buffer (chars, vs->iosb[1]); |
4359 | if (nbytes <= 0) | |
d0d6b7c5 JB |
4360 | { |
4361 | start_vms_process_read (vs); /* Crank up the next read on the process */ | |
4362 | return 1; /* Nothing worth printing, say we got 1 */ | |
4363 | } | |
e7fbaa65 | 4364 | if (carryover > 0) |
0fa1789e | 4365 | { |
e7fbaa65 KH |
4366 | /* The data carried over in the previous decoding (which are at |
4367 | the tail of decoding buffer) should be prepended to the new | |
4368 | data read to decode all together. */ | |
ed7a4b2d KH |
4369 | chars = (char *) alloca (nbytes + carryover); |
4370 | bcopy (XSTRING (p->decoding_buf)->data, buf, carryover); | |
4371 | bcopy (vs->inputBuffer, chars + carryover, nbytes); | |
0fa1789e | 4372 | } |
d0d6b7c5 | 4373 | #else /* not VMS */ |
e690ca94 KS |
4374 | |
4375 | #ifdef DATAGRAM_SOCKETS | |
4376 | /* A datagram is one packet; allow at least 1500+ bytes of data | |
4377 | corresponding to the typical Ethernet frame size. */ | |
4378 | if (DATAGRAM_CHAN_P (channel)) | |
4379 | { | |
4380 | /* carryover = 0; */ /* Does carryover make sense for datagrams? */ | |
4381 | readmax += 1024; | |
4382 | } | |
4383 | #endif | |
4384 | ||
4385 | chars = (char *) alloca (carryover + readmax); | |
e7fbaa65 KH |
4386 | if (carryover) |
4387 | /* See the comment above. */ | |
ed7a4b2d | 4388 | bcopy (XSTRING (p->decoding_buf)->data, chars, carryover); |
0fa1789e | 4389 | |
e690ca94 KS |
4390 | #ifdef DATAGRAM_SOCKETS |
4391 | /* We have a working select, so proc_buffered_char is always -1. */ | |
4392 | if (DATAGRAM_CHAN_P (channel)) | |
4393 | { | |
4394 | int len = datagram_address[channel].len; | |
4395 | nbytes = recvfrom (channel, chars + carryover, readmax - carryover, | |
4396 | 0, datagram_address[channel].sa, &len); | |
4397 | } | |
4398 | else | |
4399 | #endif | |
d0d6b7c5 | 4400 | if (proc_buffered_char[channel] < 0) |
e690ca94 | 4401 | nbytes = emacs_read (channel, chars + carryover, readmax - carryover); |
d0d6b7c5 JB |
4402 | else |
4403 | { | |
ed7a4b2d | 4404 | chars[carryover] = proc_buffered_char[channel]; |
d0d6b7c5 | 4405 | proc_buffered_char[channel] = -1; |
e690ca94 | 4406 | nbytes = emacs_read (channel, chars + carryover + 1, readmax - 1 - carryover); |
1d2fc612 RS |
4407 | if (nbytes < 0) |
4408 | nbytes = 1; | |
d0d6b7c5 | 4409 | else |
1d2fc612 | 4410 | nbytes = nbytes + 1; |
d0d6b7c5 JB |
4411 | } |
4412 | #endif /* not VMS */ | |
4413 | ||
ca65341e KH |
4414 | XSETINT (p->decoding_carryover, 0); |
4415 | ||
ed7a4b2d | 4416 | /* At this point, NBYTES holds number of bytes just received |
0fa1789e | 4417 | (including the one in proc_buffered_char[channel]). */ |
de7fbd09 KH |
4418 | if (nbytes <= 0) |
4419 | { | |
4420 | if (nbytes < 0 || coding->mode & CODING_MODE_LAST_BLOCK) | |
4421 | return nbytes; | |
4422 | coding->mode |= CODING_MODE_LAST_BLOCK; | |
4423 | } | |
d0d6b7c5 | 4424 | |
1d2fc612 | 4425 | /* Now set NBYTES how many bytes we must decode. */ |
e7fbaa65 | 4426 | nbytes += carryover; |
0fa1789e | 4427 | |
1d2fc612 | 4428 | /* Read and dispose of the process output. */ |
d0d6b7c5 JB |
4429 | outstream = p->filter; |
4430 | if (!NILP (outstream)) | |
4431 | { | |
4432 | /* We inhibit quit here instead of just catching it so that | |
4433 | hitting ^G when a filter happens to be running won't screw | |
4434 | it up. */ | |
4435 | int count = specpdl_ptr - specpdl; | |
30c78175 | 4436 | Lisp_Object odeactivate; |
dfc21838 | 4437 | Lisp_Object obuffer, okeymap; |
1d2fc612 | 4438 | Lisp_Object text; |
4da2f5be | 4439 | int outer_running_asynch_code = running_asynch_code; |
bbce7d72 | 4440 | int waiting = waiting_for_user_input_p; |
30c78175 | 4441 | |
dfc21838 RS |
4442 | /* No need to gcpro these, because all we do with them later |
4443 | is test them for EQness, and none of them should be a string. */ | |
30c78175 | 4444 | odeactivate = Vdeactivate_mark; |
dfc21838 RS |
4445 | XSETBUFFER (obuffer, current_buffer); |
4446 | okeymap = current_buffer->keymap; | |
30c78175 | 4447 | |
d0d6b7c5 | 4448 | specbind (Qinhibit_quit, Qt); |
6545aada | 4449 | specbind (Qlast_nonmenu_event, Qt); |
3b9a3dfa | 4450 | |
4da2f5be RS |
4451 | /* In case we get recursively called, |
4452 | and we already saved the match data nonrecursively, | |
4453 | save the same match data in safely recursive fashion. */ | |
4454 | if (outer_running_asynch_code) | |
4455 | { | |
4456 | Lisp_Object tem; | |
4457 | /* Don't clobber the CURRENT match data, either! */ | |
dd130227 | 4458 | tem = Fmatch_data (Qnil, Qnil); |
4da2f5be | 4459 | restore_match_data (); |
8f1ecd05 RS |
4460 | record_unwind_protect (Fset_match_data, Fmatch_data (Qnil, Qnil)); |
4461 | Fset_match_data (tem); | |
4da2f5be RS |
4462 | } |
4463 | ||
4464 | /* For speed, if a search happens within this code, | |
4465 | save the match data in a special nonrecursive fashion. */ | |
7074fde6 | 4466 | running_asynch_code = 1; |
4da2f5be | 4467 | |
ed7a4b2d KH |
4468 | text = decode_coding_string (make_unibyte_string (chars, nbytes), |
4469 | coding, 0); | |
278bfdd6 KH |
4470 | if (NILP (buffer_defaults.enable_multibyte_characters)) |
4471 | /* We had better return unibyte string. */ | |
4472 | text = string_make_unibyte (text); | |
4473 | ||
082a1df2 | 4474 | Vlast_coding_system_used = coding->symbol; |
ed7a4b2d KH |
4475 | /* A new coding system might be found. */ |
4476 | if (!EQ (p->decode_coding_system, coding->symbol)) | |
4477 | { | |
4478 | p->decode_coding_system = coding->symbol; | |
4479 | ||
4480 | /* Don't call setup_coding_system for | |
4481 | proc_decode_coding_system[channel] here. It is done in | |
4482 | detect_coding called via decode_coding above. */ | |
4483 | ||
4484 | /* If a coding system for encoding is not yet decided, we set | |
4485 | it as the same as coding-system for decoding. | |
4486 | ||
4487 | But, before doing that we must check if | |
4488 | proc_encode_coding_system[p->outfd] surely points to a | |
4489 | valid memory because p->outfd will be changed once EOF is | |
4490 | sent to the process. */ | |
4491 | if (NILP (p->encode_coding_system) | |
4492 | && proc_encode_coding_system[XINT (p->outfd)]) | |
4493 | { | |
4494 | p->encode_coding_system = coding->symbol; | |
4495 | setup_coding_system (coding->symbol, | |
4496 | proc_encode_coding_system[XINT (p->outfd)]); | |
4497 | } | |
4498 | } | |
51c6067d | 4499 | |
ed7a4b2d KH |
4500 | carryover = nbytes - coding->consumed; |
4501 | bcopy (chars + coding->consumed, XSTRING (p->decoding_buf)->data, | |
4502 | carryover); | |
4503 | XSETINT (p->decoding_carryover, carryover); | |
4504 | nbytes = STRING_BYTES (XSTRING (text)); | |
4505 | nchars = XSTRING (text)->size; | |
dd97db06 KH |
4506 | if (nbytes > 0) |
4507 | internal_condition_case_1 (read_process_output_call, | |
4508 | Fcons (outstream, | |
4509 | Fcons (proc, Fcons (text, Qnil))), | |
4510 | !NILP (Vdebug_on_error) ? Qnil : Qerror, | |
4511 | read_process_output_error_handler); | |
4da2f5be RS |
4512 | |
4513 | /* If we saved the match data nonrecursively, restore it now. */ | |
7074fde6 | 4514 | restore_match_data (); |
4da2f5be | 4515 | running_asynch_code = outer_running_asynch_code; |
d0d6b7c5 | 4516 | |
592ce97f | 4517 | /* Handling the process output should not deactivate the mark. */ |
30c78175 RS |
4518 | Vdeactivate_mark = odeactivate; |
4519 | ||
bbce7d72 RS |
4520 | /* Restore waiting_for_user_input_p as it was |
4521 | when we were called, in case the filter clobbered it. */ | |
4522 | waiting_for_user_input_p = waiting; | |
4523 | ||
7973cfa8 RS |
4524 | #if 0 /* Call record_asynch_buffer_change unconditionally, |
4525 | because we might have changed minor modes or other things | |
4526 | that affect key bindings. */ | |
dfc21838 RS |
4527 | if (! EQ (Fcurrent_buffer (), obuffer) |
4528 | || ! EQ (current_buffer->keymap, okeymap)) | |
7973cfa8 | 4529 | #endif |
927e08be RS |
4530 | /* But do it only if the caller is actually going to read events. |
4531 | Otherwise there's no need to make him wake up, and it could | |
4532 | cause trouble (for example it would make Fsit_for return). */ | |
4533 | if (waiting_for_user_input_p == -1) | |
4534 | record_asynch_buffer_change (); | |
d72534ba | 4535 | |
d0d6b7c5 JB |
4536 | #ifdef VMS |
4537 | start_vms_process_read (vs); | |
4538 | #endif | |
2ea6d561 | 4539 | unbind_to (count, Qnil); |
d0d6b7c5 JB |
4540 | return nchars; |
4541 | } | |
4542 | ||
4543 | /* If no filter, write into buffer if it isn't dead. */ | |
4544 | if (!NILP (p->buffer) && !NILP (XBUFFER (p->buffer)->name)) | |
4545 | { | |
b0310da4 | 4546 | Lisp_Object old_read_only; |
12ca5cdf | 4547 | int old_begv, old_zv; |
d8a2934e | 4548 | int old_begv_byte, old_zv_byte; |
30c78175 | 4549 | Lisp_Object odeactivate; |
d8a2934e RS |
4550 | int before, before_byte; |
4551 | int opoint_byte; | |
ed7a4b2d | 4552 | Lisp_Object text; |
926b7e5e | 4553 | struct buffer *b; |
30c78175 RS |
4554 | |
4555 | odeactivate = Vdeactivate_mark; | |
d0d6b7c5 JB |
4556 | |
4557 | Fset_buffer (p->buffer); | |
6ec8bbd2 | 4558 | opoint = PT; |
d8a2934e | 4559 | opoint_byte = PT_BYTE; |
b0310da4 | 4560 | old_read_only = current_buffer->read_only; |
12ca5cdf RS |
4561 | old_begv = BEGV; |
4562 | old_zv = ZV; | |
d8a2934e RS |
4563 | old_begv_byte = BEGV_BYTE; |
4564 | old_zv_byte = ZV_BYTE; | |
b0310da4 JB |
4565 | |
4566 | current_buffer->read_only = Qnil; | |
d0d6b7c5 JB |
4567 | |
4568 | /* Insert new output into buffer | |
4569 | at the current end-of-output marker, | |
4570 | thus preserving logical ordering of input and output. */ | |
4571 | if (XMARKER (p->mark)->buffer) | |
d8a2934e RS |
4572 | SET_PT_BOTH (clip_to_bounds (BEGV, marker_position (p->mark), ZV), |
4573 | clip_to_bounds (BEGV_BYTE, marker_byte_position (p->mark), | |
4574 | ZV_BYTE)); | |
d0d6b7c5 | 4575 | else |
d8a2934e | 4576 | SET_PT_BOTH (ZV, ZV_BYTE); |
12ca5cdf | 4577 | before = PT; |
d8a2934e | 4578 | before_byte = PT_BYTE; |
b0310da4 JB |
4579 | |
4580 | /* If the output marker is outside of the visible region, save | |
4581 | the restriction and widen. */ | |
6ec8bbd2 | 4582 | if (! (BEGV <= PT && PT <= ZV)) |
b0310da4 JB |
4583 | Fwiden (); |
4584 | ||
ed7a4b2d KH |
4585 | text = decode_coding_string (make_unibyte_string (chars, nbytes), |
4586 | coding, 0); | |
082a1df2 | 4587 | Vlast_coding_system_used = coding->symbol; |
ed7a4b2d KH |
4588 | /* A new coding system might be found. See the comment in the |
4589 | similar code in the previous `if' block. */ | |
4590 | if (!EQ (p->decode_coding_system, coding->symbol)) | |
4591 | { | |
4592 | p->decode_coding_system = coding->symbol; | |
4593 | if (NILP (p->encode_coding_system) | |
4594 | && proc_encode_coding_system[XINT (p->outfd)]) | |
4595 | { | |
4596 | p->encode_coding_system = coding->symbol; | |
4597 | setup_coding_system (coding->symbol, | |
4598 | proc_encode_coding_system[XINT (p->outfd)]); | |
4599 | } | |
4600 | } | |
4601 | carryover = nbytes - coding->consumed; | |
4602 | bcopy (chars + coding->consumed, XSTRING (p->decoding_buf)->data, | |
4603 | carryover); | |
4604 | XSETINT (p->decoding_carryover, carryover); | |
d69864bf KH |
4605 | /* Adjust the multibyteness of TEXT to that of the buffer. */ |
4606 | if (NILP (current_buffer->enable_multibyte_characters) | |
4607 | != ! STRING_MULTIBYTE (text)) | |
4608 | text = (STRING_MULTIBYTE (text) | |
57bb5c37 KH |
4609 | ? Fstring_as_unibyte (text) |
4610 | : Fstring_as_multibyte (text)); | |
ed7a4b2d KH |
4611 | nbytes = STRING_BYTES (XSTRING (text)); |
4612 | nchars = XSTRING (text)->size; | |
57bb5c37 KH |
4613 | /* Insert before markers in case we are inserting where |
4614 | the buffer's mark is, and the user's next command is Meta-y. */ | |
ed7a4b2d | 4615 | insert_from_string_before_markers (text, 0, 0, nchars, nbytes, 0); |
0d023da1 | 4616 | |
926b7e5e GM |
4617 | /* Make sure the process marker's position is valid when the |
4618 | process buffer is changed in the signal_after_change above. | |
4619 | W3 is known to do that. */ | |
4620 | if (BUFFERP (p->buffer) | |
4621 | && (b = XBUFFER (p->buffer), b != current_buffer)) | |
4622 | set_marker_both (p->mark, p->buffer, BUF_PT (b), BUF_PT_BYTE (b)); | |
4623 | else | |
4624 | set_marker_both (p->mark, p->buffer, PT, PT_BYTE); | |
b0310da4 | 4625 | |
d0d6b7c5 JB |
4626 | update_mode_lines++; |
4627 | ||
12ca5cdf RS |
4628 | /* Make sure opoint and the old restrictions |
4629 | float ahead of any new text just as point would. */ | |
4630 | if (opoint >= before) | |
d8a2934e RS |
4631 | { |
4632 | opoint += PT - before; | |
4633 | opoint_byte += PT_BYTE - before_byte; | |
4634 | } | |
12ca5cdf | 4635 | if (old_begv > before) |
d8a2934e RS |
4636 | { |
4637 | old_begv += PT - before; | |
4638 | old_begv_byte += PT_BYTE - before_byte; | |
4639 | } | |
12ca5cdf | 4640 | if (old_zv >= before) |
d8a2934e RS |
4641 | { |
4642 | old_zv += PT - before; | |
4643 | old_zv_byte += PT_BYTE - before_byte; | |
4644 | } | |
12ca5cdf | 4645 | |
b0310da4 | 4646 | /* If the restriction isn't what it should be, set it. */ |
12ca5cdf RS |
4647 | if (old_begv != BEGV || old_zv != ZV) |
4648 | Fnarrow_to_region (make_number (old_begv), make_number (old_zv)); | |
b0310da4 | 4649 | |
592ce97f | 4650 | /* Handling the process output should not deactivate the mark. */ |
30c78175 RS |
4651 | Vdeactivate_mark = odeactivate; |
4652 | ||
b0310da4 | 4653 | current_buffer->read_only = old_read_only; |
d8a2934e | 4654 | SET_PT_BOTH (opoint, opoint_byte); |
d0d6b7c5 JB |
4655 | set_buffer_internal (old); |
4656 | } | |
4657 | #ifdef VMS | |
4658 | start_vms_process_read (vs); | |
4659 | #endif | |
1d2fc612 | 4660 | return nbytes; |
d0d6b7c5 JB |
4661 | } |
4662 | ||
4663 | DEFUN ("waiting-for-user-input-p", Fwaiting_for_user_input_p, Swaiting_for_user_input_p, | |
4664 | 0, 0, 0, | |
fdb82f93 PJ |
4665 | doc: /* Returns non-nil if emacs is waiting for input from the user. |
4666 | This is intended for use by asynchronous process output filters and sentinels. */) | |
4667 | () | |
d0d6b7c5 | 4668 | { |
8b4d685f | 4669 | return (waiting_for_user_input_p ? Qt : Qnil); |
d0d6b7c5 JB |
4670 | } |
4671 | \f | |
4672 | /* Sending data to subprocess */ | |
4673 | ||
4674 | jmp_buf send_process_frame; | |
0daad115 | 4675 | Lisp_Object process_sent_to; |
d0d6b7c5 JB |
4676 | |
4677 | SIGTYPE | |
4678 | send_process_trap () | |
4679 | { | |
4680 | #ifdef BSD4_1 | |
4681 | sigrelse (SIGPIPE); | |
4682 | sigrelse (SIGALRM); | |
4683 | #endif /* BSD4_1 */ | |
4684 | longjmp (send_process_frame, 1); | |
4685 | } | |
4686 | ||
4556b700 RS |
4687 | /* Send some data to process PROC. |
4688 | BUF is the beginning of the data; LEN is the number of characters. | |
a92e4183 KH |
4689 | OBJECT is the Lisp object that the data comes from. If OBJECT is |
4690 | nil or t, it means that the data comes from C string. | |
0fa1789e | 4691 | |
a92e4183 KH |
4692 | If OBJECT is not nil, the data is encoded by PROC's coding-system |
4693 | for encoding before it is sent. | |
1fb0098c GM |
4694 | |
4695 | This function can evaluate Lisp code and can garbage collect. */ | |
4556b700 | 4696 | |
dfcf069d | 4697 | void |
4556b700 | 4698 | send_process (proc, buf, len, object) |
ecd1f654 | 4699 | volatile Lisp_Object proc; |
0daad115 GM |
4700 | unsigned char *volatile buf; |
4701 | volatile int len; | |
4702 | volatile Lisp_Object object; | |
d0d6b7c5 | 4703 | { |
ecd1f654 | 4704 | /* Use volatile to protect variables from being clobbered by longjmp. */ |
d0d6b7c5 | 4705 | int rv; |
0fa1789e | 4706 | struct coding_system *coding; |
6044e593 RS |
4707 | struct gcpro gcpro1; |
4708 | ||
4709 | GCPRO1 (object); | |
d0d6b7c5 | 4710 | |
d0d6b7c5 JB |
4711 | #ifdef VMS |
4712 | struct Lisp_Process *p = XPROCESS (proc); | |
4713 | VMS_PROC_STUFF *vs, *get_vms_process_pointer(); | |
4714 | #endif /* VMS */ | |
4715 | ||
4716 | if (! NILP (XPROCESS (proc)->raw_status_low)) | |
4717 | update_status (XPROCESS (proc)); | |
4718 | if (! EQ (XPROCESS (proc)->status, Qrun)) | |
4dd8a783 GM |
4719 | error ("Process %s not running", |
4720 | XSTRING (XPROCESS (proc)->name)->data); | |
0fa1789e | 4721 | if (XINT (XPROCESS (proc)->outfd) < 0) |
4dd8a783 GM |
4722 | error ("Output file descriptor of %s is closed", |
4723 | XSTRING (XPROCESS (proc)->name)->data); | |
0fa1789e | 4724 | |
c7580538 | 4725 | coding = proc_encode_coding_system[XINT (XPROCESS (proc)->outfd)]; |
486b111b KH |
4726 | Vlast_coding_system_used = coding->symbol; |
4727 | ||
ed7a4b2d KH |
4728 | if ((STRINGP (object) && STRING_MULTIBYTE (object)) |
4729 | || (BUFFERP (object) | |
a92e4183 KH |
4730 | && !NILP (XBUFFER (object)->enable_multibyte_characters)) |
4731 | || EQ (object, Qt)) | |
278bfdd6 | 4732 | { |
278bfdd6 KH |
4733 | if (!EQ (coding->symbol, XPROCESS (proc)->encode_coding_system)) |
4734 | /* The coding system for encoding was changed to raw-text | |
4735 | because we sent a unibyte text previously. Now we are | |
4736 | sending a multibyte text, thus we must encode it by the | |
4737 | original coding system specified for the current | |
4738 | process. */ | |
fbb70ad9 EZ |
4739 | setup_coding_system (XPROCESS (proc)->encode_coding_system, coding); |
4740 | /* src_multibyte should be set to 1 _after_ a call to | |
4741 | setup_coding_system, since it resets src_multibyte to | |
4742 | zero. */ | |
4743 | coding->src_multibyte = 1; | |
278bfdd6 KH |
4744 | } |
4745 | else | |
4746 | { | |
a92e4183 KH |
4747 | /* For sending a unibyte text, character code conversion should |
4748 | not take place but EOL conversion should. So, setup raw-text | |
4749 | or one of the subsidiary if we have not yet done it. */ | |
4750 | if (coding->type != coding_type_raw_text) | |
4751 | { | |
4752 | if (CODING_REQUIRE_FLUSHING (coding)) | |
4753 | { | |
4754 | /* But, before changing the coding, we must flush out data. */ | |
4755 | coding->mode |= CODING_MODE_LAST_BLOCK; | |
4756 | send_process (proc, "", 0, Qt); | |
4757 | } | |
4758 | coding->src_multibyte = 0; | |
4759 | setup_raw_text_coding_system (coding); | |
4760 | } | |
278bfdd6 | 4761 | } |
a4a37e65 KH |
4762 | coding->dst_multibyte = 0; |
4763 | ||
ed7a4b2d | 4764 | if (CODING_REQUIRE_ENCODING (coding)) |
0fa1789e KH |
4765 | { |
4766 | int require = encoding_buffer_size (coding, len); | |
0daad115 | 4767 | int from_byte = -1, from = -1, to = -1; |
b684d043 | 4768 | unsigned char *temp_buf = NULL; |
0fa1789e | 4769 | |
ed7a4b2d | 4770 | if (BUFFERP (object)) |
0fa1789e | 4771 | { |
ed7a4b2d KH |
4772 | from_byte = BUF_PTR_BYTE_POS (XBUFFER (object), buf); |
4773 | from = buf_bytepos_to_charpos (XBUFFER (object), from_byte); | |
4774 | to = buf_bytepos_to_charpos (XBUFFER (object), from_byte + len); | |
4775 | } | |
4776 | else if (STRINGP (object)) | |
4777 | { | |
4778 | from_byte = buf - XSTRING (object)->data; | |
4779 | from = string_byte_to_char (object, from_byte); | |
4780 | to = string_byte_to_char (object, from_byte + len); | |
0fa1789e KH |
4781 | } |
4782 | ||
452294c2 GM |
4783 | if (coding->composing != COMPOSITION_DISABLED) |
4784 | { | |
4785 | if (from_byte >= 0) | |
4786 | coding_save_composition (coding, from, to, object); | |
4787 | else | |
4788 | coding->composing = COMPOSITION_DISABLED; | |
4789 | } | |
ed7a4b2d | 4790 | |
fc932ac6 | 4791 | if (STRING_BYTES (XSTRING (XPROCESS (proc)->encoding_buf)) < require) |
ed7a4b2d KH |
4792 | XPROCESS (proc)->encoding_buf = make_uninit_string (require); |
4793 | ||
4794 | if (from_byte >= 0) | |
4795 | buf = (BUFFERP (object) | |
4796 | ? BUF_BYTE_ADDRESS (XBUFFER (object), from_byte) | |
4797 | : XSTRING (object)->data + from_byte); | |
0fa1789e | 4798 | |
0fa1789e | 4799 | object = XPROCESS (proc)->encoding_buf; |
0daad115 | 4800 | encode_coding (coding, (char *) buf, XSTRING (object)->data, |
fc932ac6 | 4801 | len, STRING_BYTES (XSTRING (object))); |
e7fbaa65 | 4802 | len = coding->produced; |
0fa1789e KH |
4803 | buf = XSTRING (object)->data; |
4804 | if (temp_buf) | |
4805 | xfree (temp_buf); | |
4806 | } | |
d0d6b7c5 JB |
4807 | |
4808 | #ifdef VMS | |
4809 | vs = get_vms_process_pointer (p->pid); | |
4810 | if (vs == 0) | |
4811 | error ("Could not find this process: %x", p->pid); | |
4812 | else if (write_to_vms_process (vs, buf, len)) | |
4813 | ; | |
0daad115 | 4814 | #else /* not VMS */ |
4556b700 RS |
4815 | |
4816 | if (pty_max_bytes == 0) | |
4817 | { | |
4818 | #if defined (HAVE_FPATHCONF) && defined (_PC_MAX_CANON) | |
4819 | pty_max_bytes = fpathconf (XFASTINT (XPROCESS (proc)->outfd), | |
4820 | _PC_MAX_CANON); | |
4821 | if (pty_max_bytes < 0) | |
4822 | pty_max_bytes = 250; | |
4823 | #else | |
4824 | pty_max_bytes = 250; | |
4825 | #endif | |
4826 | /* Deduct one, to leave space for the eof. */ | |
4827 | pty_max_bytes--; | |
4828 | } | |
4829 | ||
0daad115 GM |
4830 | /* 2000-09-21: Emacs 20.7, sparc-sun-solaris-2.6, GCC 2.95.2, |
4831 | CFLAGS="-g -O": The value of the parameter `proc' is clobbered | |
4832 | when returning with longjmp despite being declared volatile. */ | |
d0d6b7c5 | 4833 | if (!setjmp (send_process_frame)) |
0daad115 GM |
4834 | { |
4835 | process_sent_to = proc; | |
4836 | while (len > 0) | |
4837 | { | |
4838 | int this = len; | |
4839 | SIGTYPE (*old_sigpipe)(); | |
93b4f699 | 4840 | |
0daad115 GM |
4841 | /* Decide how much data we can send in one batch. |
4842 | Long lines need to be split into multiple batches. */ | |
4843 | if (!NILP (XPROCESS (proc)->pty_flag)) | |
4844 | { | |
c0ec53ad SM |
4845 | /* Starting this at zero is always correct when not the first |
4846 | iteration because the previous iteration ended by sending C-d. | |
0daad115 GM |
4847 | It may not be correct for the first iteration |
4848 | if a partial line was sent in a separate send_process call. | |
4849 | If that proves worth handling, we need to save linepos | |
4850 | in the process object. */ | |
4851 | int linepos = 0; | |
4852 | unsigned char *ptr = (unsigned char *) buf; | |
4853 | unsigned char *end = (unsigned char *) buf + len; | |
4854 | ||
4855 | /* Scan through this text for a line that is too long. */ | |
4856 | while (ptr != end && linepos < pty_max_bytes) | |
4857 | { | |
4858 | if (*ptr == '\n') | |
4859 | linepos = 0; | |
4860 | else | |
4861 | linepos++; | |
4862 | ptr++; | |
4863 | } | |
4864 | /* If we found one, break the line there | |
4865 | and put in a C-d to force the buffer through. */ | |
4866 | this = ptr - buf; | |
4867 | } | |
93b4f699 | 4868 | |
0daad115 GM |
4869 | /* Send this batch, using one or more write calls. */ |
4870 | while (this > 0) | |
4871 | { | |
e690ca94 | 4872 | int outfd = XINT (XPROCESS (proc)->outfd); |
0daad115 | 4873 | old_sigpipe = (SIGTYPE (*) ()) signal (SIGPIPE, send_process_trap); |
e690ca94 KS |
4874 | #ifdef DATAGRAM_SOCKETS |
4875 | if (DATAGRAM_CHAN_P (outfd)) | |
4876 | { | |
4877 | rv = sendto (outfd, (char *) buf, this, | |
4878 | 0, datagram_address[outfd].sa, | |
4879 | datagram_address[outfd].len); | |
4880 | if (rv < 0 && errno == EMSGSIZE) | |
4881 | report_file_error ("sending datagram", Fcons (proc, Qnil)); | |
4882 | } | |
4883 | else | |
4884 | #endif | |
4885 | rv = emacs_write (outfd, (char *) buf, this); | |
0daad115 | 4886 | signal (SIGPIPE, old_sigpipe); |
4556b700 | 4887 | |
0daad115 GM |
4888 | if (rv < 0) |
4889 | { | |
4890 | if (0 | |
d0d6b7c5 | 4891 | #ifdef EWOULDBLOCK |
0daad115 | 4892 | || errno == EWOULDBLOCK |
d0d6b7c5 JB |
4893 | #endif |
4894 | #ifdef EAGAIN | |
0daad115 | 4895 | || errno == EAGAIN |
d0d6b7c5 | 4896 | #endif |
0daad115 GM |
4897 | ) |
4898 | /* Buffer is full. Wait, accepting input; | |
4899 | that may allow the program | |
4900 | to finish doing output and read more. */ | |
4901 | { | |
4902 | Lisp_Object zero; | |
4903 | int offset = 0; | |
4556b700 | 4904 | |
3433b6bd | 4905 | #ifdef BROKEN_PTY_READ_AFTER_EAGAIN |
0daad115 GM |
4906 | /* A gross hack to work around a bug in FreeBSD. |
4907 | In the following sequence, read(2) returns | |
4908 | bogus data: | |
4909 | ||
4910 | write(2) 1022 bytes | |
4911 | write(2) 954 bytes, get EAGAIN | |
4912 | read(2) 1024 bytes in process_read_output | |
4913 | read(2) 11 bytes in process_read_output | |
4914 | ||
4915 | That is, read(2) returns more bytes than have | |
4916 | ever been written successfully. The 1033 bytes | |
4917 | read are the 1022 bytes written successfully | |
4918 | after processing (for example with CRs added if | |
4919 | the terminal is set up that way which it is | |
4920 | here). The same bytes will be seen again in a | |
4921 | later read(2), without the CRs. */ | |
3433b6bd | 4922 | |
0daad115 GM |
4923 | if (errno == EAGAIN) |
4924 | { | |
4925 | int flags = FWRITE; | |
4926 | ioctl (XINT (XPROCESS (proc)->outfd), TIOCFLUSH, | |
4927 | &flags); | |
4928 | } | |
3433b6bd GM |
4929 | #endif /* BROKEN_PTY_READ_AFTER_EAGAIN */ |
4930 | ||
0daad115 GM |
4931 | /* Running filters might relocate buffers or strings. |
4932 | Arrange to relocate BUF. */ | |
4933 | if (BUFFERP (object)) | |
4934 | offset = BUF_PTR_BYTE_POS (XBUFFER (object), buf); | |
4935 | else if (STRINGP (object)) | |
4936 | offset = buf - XSTRING (object)->data; | |
4937 | ||
4938 | XSETFASTINT (zero, 0); | |
f3e6605c | 4939 | #ifdef EMACS_HAS_USECS |
0daad115 | 4940 | wait_reading_process_input (0, 20000, zero, 0); |
f3e6605c | 4941 | #else |
0daad115 | 4942 | wait_reading_process_input (1, 0, zero, 0); |
f3e6605c | 4943 | #endif |
4556b700 | 4944 | |
0daad115 GM |
4945 | if (BUFFERP (object)) |
4946 | buf = BUF_BYTE_ADDRESS (XBUFFER (object), offset); | |
4947 | else if (STRINGP (object)) | |
4948 | buf = offset + XSTRING (object)->data; | |
4556b700 | 4949 | |
0daad115 GM |
4950 | rv = 0; |
4951 | } | |
4952 | else | |
4953 | /* This is a real error. */ | |
4954 | report_file_error ("writing to process", Fcons (proc, Qnil)); | |
4955 | } | |
4956 | buf += rv; | |
4957 | len -= rv; | |
4958 | this -= rv; | |
4959 | } | |
f76475ad | 4960 | |
0daad115 GM |
4961 | /* If we sent just part of the string, put in an EOF |
4962 | to force it through, before we send the rest. */ | |
4963 | if (len > 0) | |
4964 | Fprocess_send_eof (proc); | |
4965 | } | |
4966 | } | |
4967 | #endif /* not VMS */ | |
d0d6b7c5 JB |
4968 | else |
4969 | { | |
0daad115 GM |
4970 | #ifndef VMS |
4971 | proc = process_sent_to; | |
4972 | #endif | |
d0d6b7c5 JB |
4973 | XPROCESS (proc)->raw_status_low = Qnil; |
4974 | XPROCESS (proc)->raw_status_high = Qnil; | |
4975 | XPROCESS (proc)->status = Fcons (Qexit, Fcons (make_number (256), Qnil)); | |
4976 | XSETINT (XPROCESS (proc)->tick, ++process_tick); | |
4977 | deactivate_process (proc); | |
4978 | #ifdef VMS | |
4dd8a783 GM |
4979 | error ("Error writing to process %s; closed it", |
4980 | XSTRING (XPROCESS (proc)->name)->data); | |
d0d6b7c5 | 4981 | #else |
4dd8a783 GM |
4982 | error ("SIGPIPE raised on process %s; closed it", |
4983 | XSTRING (XPROCESS (proc)->name)->data); | |
d0d6b7c5 JB |
4984 | #endif |
4985 | } | |
6044e593 RS |
4986 | |
4987 | UNGCPRO; | |
d0d6b7c5 JB |
4988 | } |
4989 | ||
4990 | DEFUN ("process-send-region", Fprocess_send_region, Sprocess_send_region, | |
fdb82f93 PJ |
4991 | 3, 3, 0, |
4992 | doc: /* Send current contents of region as input to PROCESS. | |
4993 | PROCESS may be a process, a buffer, the name of a process or buffer, or | |
4994 | nil, indicating the current buffer's process. | |
4995 | Called from program, takes three arguments, PROCESS, START and END. | |
4996 | If the region is more than 500 characters long, | |
4997 | it is sent in several bunches. This may happen even for shorter regions. | |
4998 | Output from processes can arrive in between bunches. */) | |
4999 | (process, start, end) | |
d0d6b7c5 JB |
5000 | Lisp_Object process, start, end; |
5001 | { | |
5002 | Lisp_Object proc; | |
d8a2934e | 5003 | int start1, end1; |
d0d6b7c5 JB |
5004 | |
5005 | proc = get_process (process); | |
5006 | validate_region (&start, &end); | |
5007 | ||
5008 | if (XINT (start) < GPT && XINT (end) > GPT) | |
4da6dec8 | 5009 | move_gap (XINT (start)); |
d0d6b7c5 | 5010 | |
d8a2934e RS |
5011 | start1 = CHAR_TO_BYTE (XINT (start)); |
5012 | end1 = CHAR_TO_BYTE (XINT (end)); | |
5013 | send_process (proc, BYTE_POS_ADDR (start1), end1 - start1, | |
4556b700 | 5014 | Fcurrent_buffer ()); |
d0d6b7c5 JB |
5015 | |
5016 | return Qnil; | |
5017 | } | |
5018 | ||
5019 | DEFUN ("process-send-string", Fprocess_send_string, Sprocess_send_string, | |
fdb82f93 PJ |
5020 | 2, 2, 0, |
5021 | doc: /* Send PROCESS the contents of STRING as input. | |
5022 | PROCESS may be a process, a buffer, the name of a process or buffer, or | |
5023 | nil, indicating the current buffer's process. | |
5024 | If STRING is more than 500 characters long, | |
5025 | it is sent in several bunches. This may happen even for shorter strings. | |
5026 | Output from processes can arrive in between bunches. */) | |
5027 | (process, string) | |
d0d6b7c5 JB |
5028 | Lisp_Object process, string; |
5029 | { | |
5030 | Lisp_Object proc; | |
b7826503 | 5031 | CHECK_STRING (string); |
d0d6b7c5 | 5032 | proc = get_process (process); |
1d2fc612 | 5033 | send_process (proc, XSTRING (string)->data, |
fc932ac6 | 5034 | STRING_BYTES (XSTRING (string)), string); |
d0d6b7c5 JB |
5035 | return Qnil; |
5036 | } | |
5037 | \f | |
b81ea5ef RS |
5038 | DEFUN ("process-running-child-p", Fprocess_running_child_p, |
5039 | Sprocess_running_child_p, 0, 1, 0, | |
fdb82f93 PJ |
5040 | doc: /* Return t if PROCESS has given the terminal to a child. |
5041 | If the operating system does not make it possible to find out, | |
5042 | return t unconditionally. */) | |
5043 | (process) | |
b81ea5ef RS |
5044 | Lisp_Object process; |
5045 | { | |
5046 | /* Initialize in case ioctl doesn't exist or gives an error, | |
5047 | in a way that will cause returning t. */ | |
5048 | int gid = 0; | |
5049 | Lisp_Object proc; | |
5050 | struct Lisp_Process *p; | |
5051 | ||
5052 | proc = get_process (process); | |
5053 | p = XPROCESS (proc); | |
5054 | ||
5055 | if (!EQ (p->childp, Qt)) | |
5056 | error ("Process %s is not a subprocess", | |
5057 | XSTRING (p->name)->data); | |
5058 | if (XINT (p->infd) < 0) | |
5059 | error ("Process %s is not active", | |
5060 | XSTRING (p->name)->data); | |
5061 | ||
5062 | #ifdef TIOCGPGRP | |
5063 | if (!NILP (p->subtty)) | |
5064 | ioctl (XFASTINT (p->subtty), TIOCGPGRP, &gid); | |
5065 | else | |
5066 | ioctl (XINT (p->infd), TIOCGPGRP, &gid); | |
5067 | #endif /* defined (TIOCGPGRP ) */ | |
5068 | ||
5069 | if (gid == XFASTINT (p->pid)) | |
5070 | return Qnil; | |
5071 | return Qt; | |
5072 | } | |
5073 | \f | |
d0d6b7c5 | 5074 | /* send a signal number SIGNO to PROCESS. |
b81ea5ef RS |
5075 | If CURRENT_GROUP is t, that means send to the process group |
5076 | that currently owns the terminal being used to communicate with PROCESS. | |
d0d6b7c5 | 5077 | This is used for various commands in shell mode. |
b81ea5ef RS |
5078 | If CURRENT_GROUP is lambda, that means send to the process group |
5079 | that currently owns the terminal, but only if it is NOT the shell itself. | |
5080 | ||
d0d6b7c5 | 5081 | If NOMSG is zero, insert signal-announcements into process's buffers |
b0310da4 JB |
5082 | right away. |
5083 | ||
5084 | If we can, we try to signal PROCESS by sending control characters | |
e333e864 | 5085 | down the pty. This allows us to signal inferiors who have changed |
b0310da4 | 5086 | their uid, for which killpg would return an EPERM error. */ |
d0d6b7c5 | 5087 | |
f9738840 | 5088 | static void |
d0d6b7c5 JB |
5089 | process_send_signal (process, signo, current_group, nomsg) |
5090 | Lisp_Object process; | |
5091 | int signo; | |
5092 | Lisp_Object current_group; | |
5093 | int nomsg; | |
5094 | { | |
5095 | Lisp_Object proc; | |
5096 | register struct Lisp_Process *p; | |
5097 | int gid; | |
5098 | int no_pgrp = 0; | |
5099 | ||
5100 | proc = get_process (process); | |
5101 | p = XPROCESS (proc); | |
5102 | ||
5103 | if (!EQ (p->childp, Qt)) | |
5104 | error ("Process %s is not a subprocess", | |
5105 | XSTRING (p->name)->data); | |
a9f2c884 | 5106 | if (XINT (p->infd) < 0) |
d0d6b7c5 JB |
5107 | error ("Process %s is not active", |
5108 | XSTRING (p->name)->data); | |
5109 | ||
5110 | if (NILP (p->pty_flag)) | |
5111 | current_group = Qnil; | |
5112 | ||
d0d6b7c5 JB |
5113 | /* If we are using pgrps, get a pgrp number and make it negative. */ |
5114 | if (!NILP (current_group)) | |
5115 | { | |
b0310da4 | 5116 | #ifdef SIGNALS_VIA_CHARACTERS |
d0d6b7c5 JB |
5117 | /* If possible, send signals to the entire pgrp |
5118 | by sending an input character to it. */ | |
b0310da4 | 5119 | |
6be429b1 JB |
5120 | /* TERMIOS is the latest and bestest, and seems most likely to |
5121 | work. If the system has it, use it. */ | |
5122 | #ifdef HAVE_TERMIOS | |
5123 | struct termios t; | |
5124 | ||
5125 | switch (signo) | |
5126 | { | |
5127 | case SIGINT: | |
a9f2c884 | 5128 | tcgetattr (XINT (p->infd), &t); |
4556b700 | 5129 | send_process (proc, &t.c_cc[VINTR], 1, Qnil); |
a87b802f | 5130 | return; |
6be429b1 JB |
5131 | |
5132 | case SIGQUIT: | |
a9f2c884 | 5133 | tcgetattr (XINT (p->infd), &t); |
4556b700 | 5134 | send_process (proc, &t.c_cc[VQUIT], 1, Qnil); |
a87b802f | 5135 | return; |
6be429b1 JB |
5136 | |
5137 | case SIGTSTP: | |
a9f2c884 | 5138 | tcgetattr (XINT (p->infd), &t); |
d0adf46f | 5139 | #if defined (VSWTCH) && !defined (PREFER_VSUSP) |
4556b700 | 5140 | send_process (proc, &t.c_cc[VSWTCH], 1, Qnil); |
6be429b1 | 5141 | #else |
4556b700 | 5142 | send_process (proc, &t.c_cc[VSUSP], 1, Qnil); |
6be429b1 | 5143 | #endif |
a87b802f | 5144 | return; |
6be429b1 JB |
5145 | } |
5146 | ||
5147 | #else /* ! HAVE_TERMIOS */ | |
5148 | ||
b0310da4 JB |
5149 | /* On Berkeley descendants, the following IOCTL's retrieve the |
5150 | current control characters. */ | |
d0d6b7c5 | 5151 | #if defined (TIOCGLTC) && defined (TIOCGETC) |
b0310da4 | 5152 | |
d0d6b7c5 JB |
5153 | struct tchars c; |
5154 | struct ltchars lc; | |
5155 | ||
5156 | switch (signo) | |
5157 | { | |
5158 | case SIGINT: | |
a9f2c884 | 5159 | ioctl (XINT (p->infd), TIOCGETC, &c); |
4556b700 | 5160 | send_process (proc, &c.t_intrc, 1, Qnil); |
f9738840 | 5161 | return; |
d0d6b7c5 | 5162 | case SIGQUIT: |
a9f2c884 | 5163 | ioctl (XINT (p->infd), TIOCGETC, &c); |
4556b700 | 5164 | send_process (proc, &c.t_quitc, 1, Qnil); |
f9738840 | 5165 | return; |
0ad77c54 | 5166 | #ifdef SIGTSTP |
d0d6b7c5 | 5167 | case SIGTSTP: |
a9f2c884 | 5168 | ioctl (XINT (p->infd), TIOCGLTC, &lc); |
4556b700 | 5169 | send_process (proc, &lc.t_suspc, 1, Qnil); |
f9738840 | 5170 | return; |
b0310da4 | 5171 | #endif /* ! defined (SIGTSTP) */ |
d0d6b7c5 | 5172 | } |
b0310da4 JB |
5173 | |
5174 | #else /* ! defined (TIOCGLTC) && defined (TIOCGETC) */ | |
5175 | ||
5176 | /* On SYSV descendants, the TCGETA ioctl retrieves the current control | |
5177 | characters. */ | |
5178 | #ifdef TCGETA | |
d0d6b7c5 JB |
5179 | struct termio t; |
5180 | switch (signo) | |
5181 | { | |
5182 | case SIGINT: | |
a9f2c884 | 5183 | ioctl (XINT (p->infd), TCGETA, &t); |
4556b700 | 5184 | send_process (proc, &t.c_cc[VINTR], 1, Qnil); |
f9738840 | 5185 | return; |
d0d6b7c5 | 5186 | case SIGQUIT: |
a9f2c884 | 5187 | ioctl (XINT (p->infd), TCGETA, &t); |
4556b700 | 5188 | send_process (proc, &t.c_cc[VQUIT], 1, Qnil); |
f9738840 | 5189 | return; |
7d79e3b4 | 5190 | #ifdef SIGTSTP |
d0d6b7c5 | 5191 | case SIGTSTP: |
a9f2c884 | 5192 | ioctl (XINT (p->infd), TCGETA, &t); |
4556b700 | 5193 | send_process (proc, &t.c_cc[VSWTCH], 1, Qnil); |
f9738840 | 5194 | return; |
b0310da4 | 5195 | #endif /* ! defined (SIGTSTP) */ |
d0d6b7c5 | 5196 | } |
b0310da4 JB |
5197 | #else /* ! defined (TCGETA) */ |
5198 | Your configuration files are messed up. | |
5199 | /* If your system configuration files define SIGNALS_VIA_CHARACTERS, | |
5200 | you'd better be using one of the alternatives above! */ | |
5201 | #endif /* ! defined (TCGETA) */ | |
5202 | #endif /* ! defined (TIOCGLTC) && defined (TIOCGETC) */ | |
6be429b1 | 5203 | #endif /* ! defined HAVE_TERMIOS */ |
b0310da4 | 5204 | #endif /* ! defined (SIGNALS_VIA_CHARACTERS) */ |
d0d6b7c5 | 5205 | |
301c3fe4 | 5206 | #ifdef TIOCGPGRP |
d0d6b7c5 JB |
5207 | /* Get the pgrp using the tty itself, if we have that. |
5208 | Otherwise, use the pty to get the pgrp. | |
5209 | On pfa systems, saka@pfu.fujitsu.co.JP writes: | |
b0310da4 JB |
5210 | "TIOCGPGRP symbol defined in sys/ioctl.h at E50. |
5211 | But, TIOCGPGRP does not work on E50 ;-P works fine on E60" | |
d0d6b7c5 JB |
5212 | His patch indicates that if TIOCGPGRP returns an error, then |
5213 | we should just assume that p->pid is also the process group id. */ | |
5214 | { | |
5215 | int err; | |
5216 | ||
5217 | if (!NILP (p->subtty)) | |
5218 | err = ioctl (XFASTINT (p->subtty), TIOCGPGRP, &gid); | |
5219 | else | |
a9f2c884 | 5220 | err = ioctl (XINT (p->infd), TIOCGPGRP, &gid); |
d0d6b7c5 JB |
5221 | |
5222 | #ifdef pfa | |
5223 | if (err == -1) | |
5224 | gid = - XFASTINT (p->pid); | |
301c3fe4 | 5225 | #endif /* ! defined (pfa) */ |
d0d6b7c5 JB |
5226 | } |
5227 | if (gid == -1) | |
5228 | no_pgrp = 1; | |
5229 | else | |
5230 | gid = - gid; | |
b0310da4 | 5231 | #else /* ! defined (TIOCGPGRP ) */ |
301c3fe4 JB |
5232 | /* Can't select pgrps on this system, so we know that |
5233 | the child itself heads the pgrp. */ | |
5234 | gid = - XFASTINT (p->pid); | |
5235 | #endif /* ! defined (TIOCGPGRP ) */ | |
b81ea5ef RS |
5236 | |
5237 | /* If current_group is lambda, and the shell owns the terminal, | |
5238 | don't send any signal. */ | |
5239 | if (EQ (current_group, Qlambda) && gid == - XFASTINT (p->pid)) | |
5240 | return; | |
d0d6b7c5 JB |
5241 | } |
5242 | else | |
5243 | gid = - XFASTINT (p->pid); | |
d0d6b7c5 JB |
5244 | |
5245 | switch (signo) | |
5246 | { | |
5247 | #ifdef SIGCONT | |
5248 | case SIGCONT: | |
5249 | p->raw_status_low = Qnil; | |
5250 | p->raw_status_high = Qnil; | |
5251 | p->status = Qrun; | |
5252 | XSETINT (p->tick, ++process_tick); | |
5253 | if (!nomsg) | |
5254 | status_notify (); | |
5255 | break; | |
301c3fe4 | 5256 | #endif /* ! defined (SIGCONT) */ |
d0d6b7c5 JB |
5257 | case SIGINT: |
5258 | #ifdef VMS | |
4556b700 | 5259 | send_process (proc, "\003", 1, Qnil); /* ^C */ |
d0d6b7c5 JB |
5260 | goto whoosh; |
5261 | #endif | |
5262 | case SIGQUIT: | |
5263 | #ifdef VMS | |
4556b700 | 5264 | send_process (proc, "\031", 1, Qnil); /* ^Y */ |
d0d6b7c5 JB |
5265 | goto whoosh; |
5266 | #endif | |
5267 | case SIGKILL: | |
5268 | #ifdef VMS | |
5269 | sys$forcex (&(XFASTINT (p->pid)), 0, 1); | |
5270 | whoosh: | |
5271 | #endif | |
a9f2c884 | 5272 | flush_pending_output (XINT (p->infd)); |
d0d6b7c5 JB |
5273 | break; |
5274 | } | |
5275 | ||
5276 | /* If we don't have process groups, send the signal to the immediate | |
5277 | subprocess. That isn't really right, but it's better than any | |
5278 | obvious alternative. */ | |
5279 | if (no_pgrp) | |
5280 | { | |
5281 | kill (XFASTINT (p->pid), signo); | |
5282 | return; | |
5283 | } | |
5284 | ||
5285 | /* gid may be a pid, or minus a pgrp's number */ | |
5286 | #ifdef TIOCSIGSEND | |
5287 | if (!NILP (current_group)) | |
a9f2c884 | 5288 | ioctl (XINT (p->infd), TIOCSIGSEND, signo); |
d0d6b7c5 JB |
5289 | else |
5290 | { | |
5291 | gid = - XFASTINT (p->pid); | |
5292 | kill (gid, signo); | |
5293 | } | |
301c3fe4 | 5294 | #else /* ! defined (TIOCSIGSEND) */ |
d0d6b7c5 | 5295 | EMACS_KILLPG (-gid, signo); |
301c3fe4 | 5296 | #endif /* ! defined (TIOCSIGSEND) */ |
d0d6b7c5 JB |
5297 | } |
5298 | ||
5299 | DEFUN ("interrupt-process", Finterrupt_process, Sinterrupt_process, 0, 2, 0, | |
fdb82f93 PJ |
5300 | doc: /* Interrupt process PROCESS. |
5301 | PROCESS may be a process, a buffer, or the name of a process or buffer. | |
5302 | nil or no arg means current buffer's process. | |
5303 | Second arg CURRENT-GROUP non-nil means send signal to | |
5304 | the current process-group of the process's controlling terminal | |
5305 | rather than to the process's own process group. | |
5306 | If the process is a shell, this means interrupt current subjob | |
5307 | rather than the shell. | |
5308 | ||
5309 | If CURRENT-GROUP is `lambda', and if the shell owns the terminal, | |
5310 | don't send the signal. */) | |
5311 | (process, current_group) | |
d0d6b7c5 JB |
5312 | Lisp_Object process, current_group; |
5313 | { | |
5314 | process_send_signal (process, SIGINT, current_group, 0); | |
5315 | return process; | |
5316 | } | |
5317 | ||
5318 | DEFUN ("kill-process", Fkill_process, Skill_process, 0, 2, 0, | |
fdb82f93 PJ |
5319 | doc: /* Kill process PROCESS. May be process or name of one. |
5320 | See function `interrupt-process' for more details on usage. */) | |
5321 | (process, current_group) | |
d0d6b7c5 JB |
5322 | Lisp_Object process, current_group; |
5323 | { | |
5324 | process_send_signal (process, SIGKILL, current_group, 0); | |
5325 | return process; | |
5326 | } | |
5327 | ||
5328 | DEFUN ("quit-process", Fquit_process, Squit_process, 0, 2, 0, | |
fdb82f93 PJ |
5329 | doc: /* Send QUIT signal to process PROCESS. May be process or name of one. |
5330 | See function `interrupt-process' for more details on usage. */) | |
5331 | (process, current_group) | |
d0d6b7c5 JB |
5332 | Lisp_Object process, current_group; |
5333 | { | |
5334 | process_send_signal (process, SIGQUIT, current_group, 0); | |
5335 | return process; | |
5336 | } | |
5337 | ||
5338 | DEFUN ("stop-process", Fstop_process, Sstop_process, 0, 2, 0, | |
fdb82f93 | 5339 | doc: /* Stop process PROCESS. May be process or name of one. |
e690ca94 KS |
5340 | See function `interrupt-process' for more details on usage. |
5341 | If PROCESS is a network process, inhibit handling of incoming traffic. */) | |
fdb82f93 | 5342 | (process, current_group) |
d0d6b7c5 JB |
5343 | Lisp_Object process, current_group; |
5344 | { | |
e690ca94 KS |
5345 | #ifdef HAVE_SOCKETS |
5346 | if (PROCESSP (process) && NETCONN_P (process)) | |
5347 | { | |
5348 | struct Lisp_Process *p; | |
5349 | ||
5350 | p = XPROCESS (process); | |
5351 | if (NILP (p->command) | |
5352 | && XINT (p->infd) >= 0) | |
5353 | { | |
5354 | FD_CLR (XINT (p->infd), &input_wait_mask); | |
5355 | FD_CLR (XINT (p->infd), &non_keyboard_wait_mask); | |
5356 | } | |
5357 | p->command = Qt; | |
5358 | return process; | |
5359 | } | |
5360 | #endif | |
d0d6b7c5 JB |
5361 | #ifndef SIGTSTP |
5362 | error ("no SIGTSTP support"); | |
5363 | #else | |
5364 | process_send_signal (process, SIGTSTP, current_group, 0); | |
5365 | #endif | |
5366 | return process; | |
5367 | } | |
5368 | ||
5369 | DEFUN ("continue-process", Fcontinue_process, Scontinue_process, 0, 2, 0, | |
fdb82f93 | 5370 | doc: /* Continue process PROCESS. May be process or name of one. |
e690ca94 KS |
5371 | See function `interrupt-process' for more details on usage. |
5372 | If PROCESS is a network process, resume handling of incoming traffic. */) | |
fdb82f93 | 5373 | (process, current_group) |
d0d6b7c5 JB |
5374 | Lisp_Object process, current_group; |
5375 | { | |
e690ca94 KS |
5376 | #ifdef HAVE_SOCKETS |
5377 | if (PROCESSP (process) && NETCONN_P (process)) | |
5378 | { | |
5379 | struct Lisp_Process *p; | |
5380 | ||
5381 | p = XPROCESS (process); | |
5382 | if (EQ (p->command, Qt) | |
5383 | && XINT (p->infd) >= 0 | |
5384 | && (!EQ (p->filter, Qt) || EQ (p->status, Qlisten))) | |
5385 | { | |
5386 | FD_SET (XINT (p->infd), &input_wait_mask); | |
5387 | FD_SET (XINT (p->infd), &non_keyboard_wait_mask); | |
5388 | } | |
5389 | p->command = Qnil; | |
5390 | return process; | |
5391 | } | |
5392 | #endif | |
d0d6b7c5 JB |
5393 | #ifdef SIGCONT |
5394 | process_send_signal (process, SIGCONT, current_group, 0); | |
5395 | #else | |
5396 | error ("no SIGCONT support"); | |
5397 | #endif | |
5398 | return process; | |
5399 | } | |
5400 | ||
5401 | DEFUN ("signal-process", Fsignal_process, Ssignal_process, | |
fdb82f93 PJ |
5402 | 2, 2, "nProcess number: \nnSignal code: ", |
5403 | doc: /* Send the process with process id PID the signal with code SIGCODE. | |
5404 | PID must be an integer. The process need not be a child of this Emacs. | |
5405 | SIGCODE may be an integer, or a symbol whose name is a signal name. */) | |
5406 | (pid, sigcode) | |
4766242d | 5407 | Lisp_Object pid, sigcode; |
d0d6b7c5 | 5408 | { |
b7826503 | 5409 | CHECK_NUMBER (pid); |
4766242d RS |
5410 | |
5411 | #define handle_signal(NAME, VALUE) \ | |
5412 | else if (!strcmp (name, NAME)) \ | |
5413 | XSETINT (sigcode, VALUE) | |
5414 | ||
5415 | if (INTEGERP (sigcode)) | |
5416 | ; | |
5417 | else | |
5418 | { | |
5419 | unsigned char *name; | |
5420 | ||
b7826503 | 5421 | CHECK_SYMBOL (sigcode); |
4766242d RS |
5422 | name = XSYMBOL (sigcode)->name->data; |
5423 | ||
5424 | if (0) | |
5425 | ; | |
5426 | #ifdef SIGHUP | |
5427 | handle_signal ("SIGHUP", SIGHUP); | |
5428 | #endif | |
5429 | #ifdef SIGINT | |
5430 | handle_signal ("SIGINT", SIGINT); | |
5431 | #endif | |
5432 | #ifdef SIGQUIT | |
5433 | handle_signal ("SIGQUIT", SIGQUIT); | |
5434 | #endif | |
5435 | #ifdef SIGILL | |
5436 | handle_signal ("SIGILL", SIGILL); | |
5437 | #endif | |
5438 | #ifdef SIGABRT | |
5439 | handle_signal ("SIGABRT", SIGABRT); | |
5440 | #endif | |
5441 | #ifdef SIGEMT | |
5442 | handle_signal ("SIGEMT", SIGEMT); | |
5443 | #endif | |
5444 | #ifdef SIGKILL | |
5445 | handle_signal ("SIGKILL", SIGKILL); | |
5446 | #endif | |
5447 | #ifdef SIGFPE | |
5448 | handle_signal ("SIGFPE", SIGFPE); | |
5449 | #endif | |
5450 | #ifdef SIGBUS | |
5451 | handle_signal ("SIGBUS", SIGBUS); | |
5452 | #endif | |
5453 | #ifdef SIGSEGV | |
5454 | handle_signal ("SIGSEGV", SIGSEGV); | |
5455 | #endif | |
5456 | #ifdef SIGSYS | |
5457 | handle_signal ("SIGSYS", SIGSYS); | |
5458 | #endif | |
5459 | #ifdef SIGPIPE | |
5460 | handle_signal ("SIGPIPE", SIGPIPE); | |
5461 | #endif | |
5462 | #ifdef SIGALRM | |
5463 | handle_signal ("SIGALRM", SIGALRM); | |
5464 | #endif | |
5465 | #ifdef SIGTERM | |
5466 | handle_signal ("SIGTERM", SIGTERM); | |
5467 | #endif | |
5468 | #ifdef SIGURG | |
5469 | handle_signal ("SIGURG", SIGURG); | |
5470 | #endif | |
5471 | #ifdef SIGSTOP | |
5472 | handle_signal ("SIGSTOP", SIGSTOP); | |
5473 | #endif | |
5474 | #ifdef SIGTSTP | |
5475 | handle_signal ("SIGTSTP", SIGTSTP); | |
5476 | #endif | |
5477 | #ifdef SIGCONT | |
5478 | handle_signal ("SIGCONT", SIGCONT); | |
5479 | #endif | |
5480 | #ifdef SIGCHLD | |
5481 | handle_signal ("SIGCHLD", SIGCHLD); | |
5482 | #endif | |
5483 | #ifdef SIGTTIN | |
5484 | handle_signal ("SIGTTIN", SIGTTIN); | |
5485 | #endif | |
5486 | #ifdef SIGTTOU | |
5487 | handle_signal ("SIGTTOU", SIGTTOU); | |
5488 | #endif | |
5489 | #ifdef SIGIO | |
5490 | handle_signal ("SIGIO", SIGIO); | |
5491 | #endif | |
5492 | #ifdef SIGXCPU | |
5493 | handle_signal ("SIGXCPU", SIGXCPU); | |
5494 | #endif | |
5495 | #ifdef SIGXFSZ | |
5496 | handle_signal ("SIGXFSZ", SIGXFSZ); | |
5497 | #endif | |
5498 | #ifdef SIGVTALRM | |
5499 | handle_signal ("SIGVTALRM", SIGVTALRM); | |
5500 | #endif | |
5501 | #ifdef SIGPROF | |
5502 | handle_signal ("SIGPROF", SIGPROF); | |
5503 | #endif | |
5504 | #ifdef SIGWINCH | |
5505 | handle_signal ("SIGWINCH", SIGWINCH); | |
5506 | #endif | |
5507 | #ifdef SIGINFO | |
5508 | handle_signal ("SIGINFO", SIGINFO); | |
5509 | #endif | |
5510 | #ifdef SIGUSR1 | |
5511 | handle_signal ("SIGUSR1", SIGUSR1); | |
5512 | #endif | |
5513 | #ifdef SIGUSR2 | |
5514 | handle_signal ("SIGUSR2", SIGUSR2); | |
5515 | #endif | |
5516 | else | |
9fa195a2 | 5517 | error ("Undefined signal name %s", name); |
4766242d RS |
5518 | } |
5519 | ||
5520 | #undef handle_signal | |
5521 | ||
4766242d | 5522 | return make_number (kill (XINT (pid), XINT (sigcode))); |
d0d6b7c5 JB |
5523 | } |
5524 | ||
5525 | DEFUN ("process-send-eof", Fprocess_send_eof, Sprocess_send_eof, 0, 1, 0, | |
fdb82f93 PJ |
5526 | doc: /* Make PROCESS see end-of-file in its input. |
5527 | EOF comes after any text already sent to it. | |
5528 | PROCESS may be a process, a buffer, the name of a process or buffer, or | |
5529 | nil, indicating the current buffer's process. | |
5530 | If PROCESS is a network connection, or is a process communicating | |
5531 | through a pipe (as opposed to a pty), then you cannot send any more | |
5532 | text to PROCESS after you call this function. */) | |
5533 | (process) | |
d0d6b7c5 JB |
5534 | Lisp_Object process; |
5535 | { | |
5536 | Lisp_Object proc; | |
de7fbd09 | 5537 | struct coding_system *coding; |
d0d6b7c5 | 5538 | |
e690ca94 KS |
5539 | if (DATAGRAM_CONN_P (process)) |
5540 | return process; | |
5541 | ||
d0d6b7c5 | 5542 | proc = get_process (process); |
de7fbd09 | 5543 | coding = proc_encode_coding_system[XINT (XPROCESS (proc)->outfd)]; |
577d03d5 RS |
5544 | |
5545 | /* Make sure the process is really alive. */ | |
5546 | if (! NILP (XPROCESS (proc)->raw_status_low)) | |
5547 | update_status (XPROCESS (proc)); | |
5548 | if (! EQ (XPROCESS (proc)->status, Qrun)) | |
dcf970e6 | 5549 | error ("Process %s not running", XSTRING (XPROCESS (proc)->name)->data); |
577d03d5 | 5550 | |
de7fbd09 KH |
5551 | if (CODING_REQUIRE_FLUSHING (coding)) |
5552 | { | |
5553 | coding->mode |= CODING_MODE_LAST_BLOCK; | |
5554 | send_process (proc, "", 0, Qnil); | |
5555 | } | |
5556 | ||
d0d6b7c5 | 5557 | #ifdef VMS |
4556b700 | 5558 | send_process (proc, "\032", 1, Qnil); /* ^z */ |
d0d6b7c5 JB |
5559 | #else |
5560 | if (!NILP (XPROCESS (proc)->pty_flag)) | |
4556b700 | 5561 | send_process (proc, "\004", 1, Qnil); |
d0d6b7c5 JB |
5562 | else |
5563 | { | |
4525f571 RS |
5564 | int old_outfd, new_outfd; |
5565 | ||
93853f3d | 5566 | #ifdef HAVE_SHUTDOWN |
02f55c4b RS |
5567 | /* If this is a network connection, or socketpair is used |
5568 | for communication with the subprocess, call shutdown to cause EOF. | |
5569 | (In some old system, shutdown to socketpair doesn't work. | |
5570 | Then we just can't win.) */ | |
5571 | if (NILP (XPROCESS (proc)->pid) | |
5572 | || XINT (XPROCESS (proc)->outfd) == XINT (XPROCESS (proc)->infd)) | |
5573 | shutdown (XINT (XPROCESS (proc)->outfd), 1); | |
5574 | /* In case of socketpair, outfd == infd, so don't close it. */ | |
5575 | if (XINT (XPROCESS (proc)->outfd) != XINT (XPROCESS (proc)->infd)) | |
68c45bf0 | 5576 | emacs_close (XINT (XPROCESS (proc)->outfd)); |
93853f3d | 5577 | #else /* not HAVE_SHUTDOWN */ |
68c45bf0 | 5578 | emacs_close (XINT (XPROCESS (proc)->outfd)); |
93853f3d | 5579 | #endif /* not HAVE_SHUTDOWN */ |
68c45bf0 | 5580 | new_outfd = emacs_open (NULL_DEVICE, O_WRONLY, 0); |
4525f571 RS |
5581 | old_outfd = XINT (XPROCESS (proc)->outfd); |
5582 | ||
5583 | if (!proc_encode_coding_system[new_outfd]) | |
5584 | proc_encode_coding_system[new_outfd] | |
5585 | = (struct coding_system *) xmalloc (sizeof (struct coding_system)); | |
5586 | bcopy (proc_encode_coding_system[old_outfd], | |
5587 | proc_encode_coding_system[new_outfd], | |
5588 | sizeof (struct coding_system)); | |
5589 | bzero (proc_encode_coding_system[old_outfd], | |
5590 | sizeof (struct coding_system)); | |
5591 | ||
5592 | XSETINT (XPROCESS (proc)->outfd, new_outfd); | |
d0d6b7c5 JB |
5593 | } |
5594 | #endif /* VMS */ | |
d0d6b7c5 JB |
5595 | return process; |
5596 | } | |
5597 | ||
5598 | /* Kill all processes associated with `buffer'. | |
3fed8ad5 | 5599 | If `buffer' is nil, kill all processes */ |
d0d6b7c5 | 5600 | |
6b53bb85 | 5601 | void |
d0d6b7c5 JB |
5602 | kill_buffer_processes (buffer) |
5603 | Lisp_Object buffer; | |
5604 | { | |
5605 | Lisp_Object tail, proc; | |
5606 | ||
70949dac | 5607 | for (tail = Vprocess_alist; GC_CONSP (tail); tail = XCDR (tail)) |
d0d6b7c5 | 5608 | { |
70949dac | 5609 | proc = XCDR (XCAR (tail)); |
b5b502d6 | 5610 | if (GC_PROCESSP (proc) |
d0d6b7c5 JB |
5611 | && (NILP (buffer) || EQ (XPROCESS (proc)->buffer, buffer))) |
5612 | { | |
5613 | if (NETCONN_P (proc)) | |
e1ab4959 | 5614 | Fdelete_process (proc); |
a9f2c884 | 5615 | else if (XINT (XPROCESS (proc)->infd) >= 0) |
d0d6b7c5 JB |
5616 | process_send_signal (proc, SIGHUP, Qnil, 1); |
5617 | } | |
5618 | } | |
5619 | } | |
5620 | \f | |
3fed8ad5 GM |
5621 | /* On receipt of a signal that a child status has changed, loop asking |
5622 | about children with changed statuses until the system says there | |
5623 | are no more. | |
5624 | ||
5625 | All we do is change the status; we do not run sentinels or print | |
5626 | notifications. That is saved for the next time keyboard input is | |
5627 | done, in order to avoid timing errors. | |
5628 | ||
5629 | ** WARNING: this can be called during garbage collection. | |
5630 | Therefore, it must not be fooled by the presence of mark bits in | |
5631 | Lisp objects. | |
5632 | ||
5633 | ** USG WARNING: Although it is not obvious from the documentation | |
5634 | in signal(2), on a USG system the SIGCLD handler MUST NOT call | |
5635 | signal() before executing at least one wait(), otherwise the | |
5636 | handler will be called again, resulting in an infinite loop. The | |
5637 | relevant portion of the documentation reads "SIGCLD signals will be | |
5638 | queued and the signal-catching function will be continually | |
5639 | reentered until the queue is empty". Invoking signal() causes the | |
5640 | kernel to reexamine the SIGCLD queue. Fred Fish, UniSoft Systems | |
5641 | Inc. */ | |
d0d6b7c5 JB |
5642 | |
5643 | SIGTYPE | |
5644 | sigchld_handler (signo) | |
5645 | int signo; | |
5646 | { | |
5647 | int old_errno = errno; | |
5648 | Lisp_Object proc; | |
5649 | register struct Lisp_Process *p; | |
6be429b1 | 5650 | extern EMACS_TIME *input_available_clear_time; |
d0d6b7c5 JB |
5651 | |
5652 | #ifdef BSD4_1 | |
5653 | extern int sigheld; | |
5654 | sigheld |= sigbit (SIGCHLD); | |
5655 | #endif | |
5656 | ||
5657 | while (1) | |
5658 | { | |
5659 | register int pid; | |
5660 | WAITTYPE w; | |
5661 | Lisp_Object tail; | |
5662 | ||
5663 | #ifdef WNOHANG | |
5664 | #ifndef WUNTRACED | |
5665 | #define WUNTRACED 0 | |
5666 | #endif /* no WUNTRACED */ | |
5667 | /* Keep trying to get a status until we get a definitive result. */ | |
5668 | do | |
5669 | { | |
5670 | errno = 0; | |
5671 | pid = wait3 (&w, WNOHANG | WUNTRACED, 0); | |
5672 | } | |
3fed8ad5 | 5673 | while (pid < 0 && errno == EINTR); |
d0d6b7c5 JB |
5674 | |
5675 | if (pid <= 0) | |
5676 | { | |
3fed8ad5 GM |
5677 | /* PID == 0 means no processes found, PID == -1 means a real |
5678 | failure. We have done all our job, so return. */ | |
d0d6b7c5 JB |
5679 | |
5680 | /* USG systems forget handlers when they are used; | |
5681 | must reestablish each time */ | |
3c0ee47b | 5682 | #if defined (USG) && !defined (POSIX_SIGNALS) |
d0d6b7c5 JB |
5683 | signal (signo, sigchld_handler); /* WARNING - must come after wait3() */ |
5684 | #endif | |
5685 | #ifdef BSD4_1 | |
5686 | sigheld &= ~sigbit (SIGCHLD); | |
5687 | sigrelse (SIGCHLD); | |
5688 | #endif | |
5689 | errno = old_errno; | |
5690 | return; | |
5691 | } | |
5692 | #else | |
5693 | pid = wait (&w); | |
5694 | #endif /* no WNOHANG */ | |
5695 | ||
5696 | /* Find the process that signaled us, and record its status. */ | |
5697 | ||
5698 | p = 0; | |
3fed8ad5 | 5699 | for (tail = Vprocess_alist; GC_CONSP (tail); tail = XCDR (tail)) |
d0d6b7c5 | 5700 | { |
70949dac | 5701 | proc = XCDR (XCAR (tail)); |
d0d6b7c5 | 5702 | p = XPROCESS (proc); |
3fed8ad5 | 5703 | if (GC_EQ (p->childp, Qt) && XINT (p->pid) == pid) |
d0d6b7c5 JB |
5704 | break; |
5705 | p = 0; | |
5706 | } | |
5707 | ||
5708 | /* Look for an asynchronous process whose pid hasn't been filled | |
5709 | in yet. */ | |
5710 | if (p == 0) | |
3fed8ad5 | 5711 | for (tail = Vprocess_alist; GC_CONSP (tail); tail = XCDR (tail)) |
d0d6b7c5 | 5712 | { |
70949dac | 5713 | proc = XCDR (XCAR (tail)); |
d0d6b7c5 | 5714 | p = XPROCESS (proc); |
3fed8ad5 | 5715 | if (GC_INTEGERP (p->pid) && XINT (p->pid) == -1) |
d0d6b7c5 JB |
5716 | break; |
5717 | p = 0; | |
5718 | } | |
5719 | ||
5720 | /* Change the status of the process that was found. */ | |
5721 | if (p != 0) | |
5722 | { | |
5723 | union { int i; WAITTYPE wt; } u; | |
e98d950b | 5724 | int clear_desc_flag = 0; |
d0d6b7c5 JB |
5725 | |
5726 | XSETINT (p->tick, ++process_tick); | |
5727 | u.wt = w; | |
5fc0154c RS |
5728 | XSETINT (p->raw_status_low, u.i & 0xffff); |
5729 | XSETINT (p->raw_status_high, u.i >> 16); | |
d0d6b7c5 JB |
5730 | |
5731 | /* If process has terminated, stop waiting for its output. */ | |
e98d950b RS |
5732 | if ((WIFSIGNALED (w) || WIFEXITED (w)) |
5733 | && XINT (p->infd) >= 0) | |
5734 | clear_desc_flag = 1; | |
5735 | ||
5736 | /* We use clear_desc_flag to avoid a compiler bug in Microsoft C. */ | |
5737 | if (clear_desc_flag) | |
5738 | { | |
5739 | FD_CLR (XINT (p->infd), &input_wait_mask); | |
5740 | FD_CLR (XINT (p->infd), &non_keyboard_wait_mask); | |
5741 | } | |
6be429b1 JB |
5742 | |
5743 | /* Tell wait_reading_process_input that it needs to wake up and | |
5744 | look around. */ | |
5745 | if (input_available_clear_time) | |
5746 | EMACS_SET_SECS_USECS (*input_available_clear_time, 0, 0); | |
d0d6b7c5 JB |
5747 | } |
5748 | ||
5749 | /* There was no asynchronous process found for that id. Check | |
5750 | if we have a synchronous process. */ | |
5751 | else | |
5752 | { | |
5753 | synch_process_alive = 0; | |
5754 | ||
5755 | /* Report the status of the synchronous process. */ | |
5756 | if (WIFEXITED (w)) | |
5757 | synch_process_retcode = WRETCODE (w); | |
5758 | else if (WIFSIGNALED (w)) | |
b97ad9ea RS |
5759 | { |
5760 | int code = WTERMSIG (w); | |
68c45bf0 PE |
5761 | char *signame; |
5762 | ||
ca9c0567 | 5763 | synchronize_system_messages_locale (); |
68c45bf0 | 5764 | signame = strsignal (code); |
b97ad9ea | 5765 | |
b97ad9ea RS |
5766 | if (signame == 0) |
5767 | signame = "unknown"; | |
5768 | ||
5769 | synch_process_death = signame; | |
5770 | } | |
6be429b1 JB |
5771 | |
5772 | /* Tell wait_reading_process_input that it needs to wake up and | |
5773 | look around. */ | |
5774 | if (input_available_clear_time) | |
5775 | EMACS_SET_SECS_USECS (*input_available_clear_time, 0, 0); | |
d0d6b7c5 JB |
5776 | } |
5777 | ||
5778 | /* On some systems, we must return right away. | |
5779 | If any more processes want to signal us, we will | |
5780 | get another signal. | |
5781 | Otherwise (on systems that have WNOHANG), loop around | |
5782 | to use up all the processes that have something to tell us. */ | |
4e6277d8 | 5783 | #if (defined WINDOWSNT \ |
8a2a6032 | 5784 | || (defined USG && !defined GNU_LINUX \ |
4e6277d8 | 5785 | && !(defined HPUX && defined WNOHANG))) |
3c0ee47b | 5786 | #if defined (USG) && ! defined (POSIX_SIGNALS) |
d0d6b7c5 JB |
5787 | signal (signo, sigchld_handler); |
5788 | #endif | |
5789 | errno = old_errno; | |
5790 | return; | |
5791 | #endif /* USG, but not HPUX with WNOHANG */ | |
5792 | } | |
5793 | } | |
5794 | \f | |
5795 | ||
5796 | static Lisp_Object | |
5797 | exec_sentinel_unwind (data) | |
5798 | Lisp_Object data; | |
5799 | { | |
70949dac | 5800 | XPROCESS (XCAR (data))->sentinel = XCDR (data); |
d0d6b7c5 JB |
5801 | return Qnil; |
5802 | } | |
5803 | ||
3b9a3dfa RS |
5804 | static Lisp_Object |
5805 | exec_sentinel_error_handler (error) | |
5806 | Lisp_Object error; | |
5807 | { | |
5808 | cmd_error_internal (error, "error in process sentinel: "); | |
5809 | Vinhibit_quit = Qt; | |
5810 | update_echo_area (); | |
833ba342 | 5811 | Fsleep_for (make_number (2), Qnil); |
8c983bf2 | 5812 | return Qt; |
3b9a3dfa RS |
5813 | } |
5814 | ||
d0d6b7c5 JB |
5815 | static void |
5816 | exec_sentinel (proc, reason) | |
5817 | Lisp_Object proc, reason; | |
5818 | { | |
dfc21838 | 5819 | Lisp_Object sentinel, obuffer, odeactivate, okeymap; |
d0d6b7c5 JB |
5820 | register struct Lisp_Process *p = XPROCESS (proc); |
5821 | int count = specpdl_ptr - specpdl; | |
4da2f5be | 5822 | int outer_running_asynch_code = running_asynch_code; |
bbce7d72 | 5823 | int waiting = waiting_for_user_input_p; |
d0d6b7c5 | 5824 | |
dfc21838 RS |
5825 | /* No need to gcpro these, because all we do with them later |
5826 | is test them for EQness, and none of them should be a string. */ | |
8fb3cf64 | 5827 | odeactivate = Vdeactivate_mark; |
dfc21838 RS |
5828 | XSETBUFFER (obuffer, current_buffer); |
5829 | okeymap = current_buffer->keymap; | |
5830 | ||
d0d6b7c5 JB |
5831 | sentinel = p->sentinel; |
5832 | if (NILP (sentinel)) | |
5833 | return; | |
5834 | ||
5835 | /* Zilch the sentinel while it's running, to avoid recursive invocations; | |
5836 | assure that it gets restored no matter how the sentinel exits. */ | |
5837 | p->sentinel = Qnil; | |
5838 | record_unwind_protect (exec_sentinel_unwind, Fcons (proc, sentinel)); | |
5839 | /* Inhibit quit so that random quits don't screw up a running filter. */ | |
5840 | specbind (Qinhibit_quit, Qt); | |
6545aada | 5841 | specbind (Qlast_nonmenu_event, Qt); |
3b9a3dfa | 5842 | |
4da2f5be RS |
5843 | /* In case we get recursively called, |
5844 | and we already saved the match data nonrecursively, | |
5845 | save the same match data in safely recursive fashion. */ | |
5846 | if (outer_running_asynch_code) | |
5847 | { | |
5848 | Lisp_Object tem; | |
dd130227 | 5849 | tem = Fmatch_data (Qnil, Qnil); |
4da2f5be | 5850 | restore_match_data (); |
8f1ecd05 RS |
5851 | record_unwind_protect (Fset_match_data, Fmatch_data (Qnil, Qnil)); |
5852 | Fset_match_data (tem); | |
4da2f5be RS |
5853 | } |
5854 | ||
5855 | /* For speed, if a search happens within this code, | |
5856 | save the match data in a special nonrecursive fashion. */ | |
7074fde6 | 5857 | running_asynch_code = 1; |
4da2f5be | 5858 | |
3b9a3dfa RS |
5859 | internal_condition_case_1 (read_process_output_call, |
5860 | Fcons (sentinel, | |
5861 | Fcons (proc, Fcons (reason, Qnil))), | |
5862 | !NILP (Vdebug_on_error) ? Qnil : Qerror, | |
5863 | exec_sentinel_error_handler); | |
4da2f5be RS |
5864 | |
5865 | /* If we saved the match data nonrecursively, restore it now. */ | |
7074fde6 | 5866 | restore_match_data (); |
4da2f5be | 5867 | running_asynch_code = outer_running_asynch_code; |
8fb3cf64 KH |
5868 | |
5869 | Vdeactivate_mark = odeactivate; | |
bbce7d72 RS |
5870 | |
5871 | /* Restore waiting_for_user_input_p as it was | |
5872 | when we were called, in case the filter clobbered it. */ | |
5873 | waiting_for_user_input_p = waiting; | |
5874 | ||
7973cfa8 | 5875 | #if 0 |
dfc21838 RS |
5876 | if (! EQ (Fcurrent_buffer (), obuffer) |
5877 | || ! EQ (current_buffer->keymap, okeymap)) | |
7973cfa8 | 5878 | #endif |
927e08be RS |
5879 | /* But do it only if the caller is actually going to read events. |
5880 | Otherwise there's no need to make him wake up, and it could | |
5881 | cause trouble (for example it would make Fsit_for return). */ | |
5882 | if (waiting_for_user_input_p == -1) | |
5883 | record_asynch_buffer_change (); | |
8fb3cf64 | 5884 | |
2ea6d561 | 5885 | unbind_to (count, Qnil); |
d0d6b7c5 JB |
5886 | } |
5887 | ||
5888 | /* Report all recent events of a change in process status | |
5889 | (either run the sentinel or output a message). | |
5890 | This is done while Emacs is waiting for keyboard input. */ | |
5891 | ||
6b53bb85 | 5892 | void |
d0d6b7c5 JB |
5893 | status_notify () |
5894 | { | |
5895 | register Lisp_Object proc, buffer; | |
2e4149a8 | 5896 | Lisp_Object tail, msg; |
d0d6b7c5 JB |
5897 | struct gcpro gcpro1, gcpro2; |
5898 | ||
2e4149a8 KH |
5899 | tail = Qnil; |
5900 | msg = Qnil; | |
d0d6b7c5 JB |
5901 | /* We need to gcpro tail; if read_process_output calls a filter |
5902 | which deletes a process and removes the cons to which tail points | |
5903 | from Vprocess_alist, and then causes a GC, tail is an unprotected | |
5904 | reference. */ | |
5905 | GCPRO2 (tail, msg); | |
5906 | ||
30623085 RS |
5907 | /* Set this now, so that if new processes are created by sentinels |
5908 | that we run, we get called again to handle their status changes. */ | |
5909 | update_tick = process_tick; | |
5910 | ||
5911 | for (tail = Vprocess_alist; !NILP (tail); tail = Fcdr (tail)) | |
d0d6b7c5 | 5912 | { |
30623085 RS |
5913 | Lisp_Object symbol; |
5914 | register struct Lisp_Process *p; | |
5915 | ||
5916 | proc = Fcdr (Fcar (tail)); | |
5917 | p = XPROCESS (proc); | |
5918 | ||
5919 | if (XINT (p->tick) != XINT (p->update_tick)) | |
d0d6b7c5 | 5920 | { |
30623085 | 5921 | XSETINT (p->update_tick, XINT (p->tick)); |
d0d6b7c5 | 5922 | |
30623085 | 5923 | /* If process is still active, read any output that remains. */ |
4da2f5be | 5924 | while (! EQ (p->filter, Qt) |
dd2a17ab | 5925 | && ! EQ (p->status, Qconnect) |
e690ca94 KS |
5926 | && ! EQ (p->status, Qlisten) |
5927 | && ! EQ (p->command, Qt) /* Network process not stopped. */ | |
4da2f5be RS |
5928 | && XINT (p->infd) >= 0 |
5929 | && read_process_output (proc, XINT (p->infd)) > 0); | |
d0d6b7c5 | 5930 | |
30623085 | 5931 | buffer = p->buffer; |
d0d6b7c5 | 5932 | |
30623085 RS |
5933 | /* Get the text to use for the message. */ |
5934 | if (!NILP (p->raw_status_low)) | |
5935 | update_status (p); | |
5936 | msg = status_message (p->status); | |
d0d6b7c5 | 5937 | |
30623085 RS |
5938 | /* If process is terminated, deactivate it or delete it. */ |
5939 | symbol = p->status; | |
5940 | if (CONSP (p->status)) | |
70949dac | 5941 | symbol = XCAR (p->status); |
d0d6b7c5 | 5942 | |
30623085 RS |
5943 | if (EQ (symbol, Qsignal) || EQ (symbol, Qexit) |
5944 | || EQ (symbol, Qclosed)) | |
5945 | { | |
5946 | if (delete_exited_processes) | |
5947 | remove_process (proc); | |
5948 | else | |
5949 | deactivate_process (proc); | |
5950 | } | |
d0d6b7c5 | 5951 | |
0ad61fe7 RS |
5952 | /* The actions above may have further incremented p->tick. |
5953 | So set p->update_tick again | |
5954 | so that an error in the sentinel will not cause | |
5955 | this code to be run again. */ | |
5956 | XSETINT (p->update_tick, XINT (p->tick)); | |
30623085 RS |
5957 | /* Now output the message suitably. */ |
5958 | if (!NILP (p->sentinel)) | |
5959 | exec_sentinel (proc, msg); | |
5960 | /* Don't bother with a message in the buffer | |
5961 | when a process becomes runnable. */ | |
5962 | else if (!EQ (symbol, Qrun) && !NILP (buffer)) | |
5963 | { | |
5964 | Lisp_Object ro, tem; | |
5965 | struct buffer *old = current_buffer; | |
d8a2934e RS |
5966 | int opoint, opoint_byte; |
5967 | int before, before_byte; | |
2e4149a8 | 5968 | |
30623085 | 5969 | ro = XBUFFER (buffer)->read_only; |
d0d6b7c5 | 5970 | |
30623085 RS |
5971 | /* Avoid error if buffer is deleted |
5972 | (probably that's why the process is dead, too) */ | |
5973 | if (NILP (XBUFFER (buffer)->name)) | |
5974 | continue; | |
5975 | Fset_buffer (buffer); | |
12ca5cdf | 5976 | |
6ec8bbd2 | 5977 | opoint = PT; |
d8a2934e | 5978 | opoint_byte = PT_BYTE; |
30623085 RS |
5979 | /* Insert new output into buffer |
5980 | at the current end-of-output marker, | |
5981 | thus preserving logical ordering of input and output. */ | |
5982 | if (XMARKER (p->mark)->buffer) | |
d8a2934e | 5983 | Fgoto_char (p->mark); |
30623085 | 5984 | else |
d8a2934e | 5985 | SET_PT_BOTH (ZV, ZV_BYTE); |
12ca5cdf RS |
5986 | |
5987 | before = PT; | |
d8a2934e | 5988 | before_byte = PT_BYTE; |
30623085 RS |
5989 | |
5990 | tem = current_buffer->read_only; | |
5991 | current_buffer->read_only = Qnil; | |
5992 | insert_string ("\nProcess "); | |
5993 | Finsert (1, &p->name); | |
5994 | insert_string (" "); | |
5995 | Finsert (1, &msg); | |
5996 | current_buffer->read_only = tem; | |
d8a2934e | 5997 | set_marker_both (p->mark, p->buffer, PT, PT_BYTE); |
30623085 | 5998 | |
12ca5cdf | 5999 | if (opoint >= before) |
d8a2934e RS |
6000 | SET_PT_BOTH (opoint + (PT - before), |
6001 | opoint_byte + (PT_BYTE - before_byte)); | |
12ca5cdf | 6002 | else |
d8a2934e | 6003 | SET_PT_BOTH (opoint, opoint_byte); |
12ca5cdf | 6004 | |
30623085 | 6005 | set_buffer_internal (old); |
d0d6b7c5 | 6006 | } |
30623085 RS |
6007 | } |
6008 | } /* end for */ | |
d0d6b7c5 JB |
6009 | |
6010 | update_mode_lines++; /* in case buffers use %s in mode-line-format */ | |
3007ebfb | 6011 | redisplay_preserve_echo_area (13); |
d0d6b7c5 | 6012 | |
d0d6b7c5 JB |
6013 | UNGCPRO; |
6014 | } | |
0fa1789e KH |
6015 | |
6016 | \f | |
6017 | DEFUN ("set-process-coding-system", Fset_process_coding_system, | |
6018 | Sset_process_coding_system, 1, 3, 0, | |
fdb82f93 PJ |
6019 | doc: /* Set coding systems of PROCESS to DECODING and ENCODING. |
6020 | DECODING will be used to decode subprocess output and ENCODING to | |
6021 | encode subprocess input. */) | |
6022 | (proc, decoding, encoding) | |
0fa1789e KH |
6023 | register Lisp_Object proc, decoding, encoding; |
6024 | { | |
6025 | register struct Lisp_Process *p; | |
6026 | ||
b7826503 | 6027 | CHECK_PROCESS (proc); |
0fa1789e KH |
6028 | p = XPROCESS (proc); |
6029 | if (XINT (p->infd) < 0) | |
6030 | error ("Input file descriptor of %s closed", XSTRING (p->name)->data); | |
6031 | if (XINT (p->outfd) < 0) | |
6032 | error ("Output file descriptor of %s closed", XSTRING (p->name)->data); | |
6033 | ||
6034 | p->decode_coding_system = Fcheck_coding_system (decoding); | |
6035 | p->encode_coding_system = Fcheck_coding_system (encoding); | |
6036 | setup_coding_system (decoding, | |
c7580538 | 6037 | proc_decode_coding_system[XINT (p->infd)]); |
0fa1789e | 6038 | setup_coding_system (encoding, |
c7580538 | 6039 | proc_encode_coding_system[XINT (p->outfd)]); |
0fa1789e KH |
6040 | |
6041 | return Qnil; | |
6042 | } | |
6043 | ||
6044 | DEFUN ("process-coding-system", | |
6045 | Fprocess_coding_system, Sprocess_coding_system, 1, 1, 0, | |
fdb82f93 PJ |
6046 | doc: /* Return a cons of coding systems for decoding and encoding of PROCESS. */) |
6047 | (proc) | |
0fa1789e KH |
6048 | register Lisp_Object proc; |
6049 | { | |
b7826503 | 6050 | CHECK_PROCESS (proc); |
0fa1789e KH |
6051 | return Fcons (XPROCESS (proc)->decode_coding_system, |
6052 | XPROCESS (proc)->encode_coding_system); | |
6053 | } | |
d0d6b7c5 | 6054 | \f |
a69281ff RS |
6055 | /* The first time this is called, assume keyboard input comes from DESC |
6056 | instead of from where we used to expect it. | |
6057 | Subsequent calls mean assume input keyboard can come from DESC | |
6058 | in addition to other places. */ | |
6059 | ||
6060 | static int add_keyboard_wait_descriptor_called_flag; | |
6061 | ||
6062 | void | |
6063 | add_keyboard_wait_descriptor (desc) | |
6064 | int desc; | |
6065 | { | |
6066 | if (! add_keyboard_wait_descriptor_called_flag) | |
6067 | FD_CLR (0, &input_wait_mask); | |
6068 | add_keyboard_wait_descriptor_called_flag = 1; | |
6069 | FD_SET (desc, &input_wait_mask); | |
b5dc1c83 | 6070 | FD_SET (desc, &non_process_wait_mask); |
a69281ff RS |
6071 | if (desc > max_keyboard_desc) |
6072 | max_keyboard_desc = desc; | |
6073 | } | |
6074 | ||
6075 | /* From now on, do not expect DESC to give keyboard input. */ | |
6076 | ||
6077 | void | |
6078 | delete_keyboard_wait_descriptor (desc) | |
6079 | int desc; | |
6080 | { | |
6081 | int fd; | |
6082 | int lim = max_keyboard_desc; | |
6083 | ||
6084 | FD_CLR (desc, &input_wait_mask); | |
b5dc1c83 | 6085 | FD_CLR (desc, &non_process_wait_mask); |
a69281ff RS |
6086 | |
6087 | if (desc == max_keyboard_desc) | |
6088 | for (fd = 0; fd < lim; fd++) | |
6089 | if (FD_ISSET (fd, &input_wait_mask) | |
6090 | && !FD_ISSET (fd, &non_keyboard_wait_mask)) | |
6091 | max_keyboard_desc = fd; | |
6092 | } | |
6093 | ||
6094 | /* Return nonzero if *MASK has a bit set | |
6095 | that corresponds to one of the keyboard input descriptors. */ | |
6096 | ||
6097 | int | |
6098 | keyboard_bit_set (mask) | |
6099 | SELECT_TYPE *mask; | |
6100 | { | |
6101 | int fd; | |
6102 | ||
ee8e09af | 6103 | for (fd = 0; fd <= max_keyboard_desc; fd++) |
a69281ff RS |
6104 | if (FD_ISSET (fd, mask) && FD_ISSET (fd, &input_wait_mask) |
6105 | && !FD_ISSET (fd, &non_keyboard_wait_mask)) | |
6106 | return 1; | |
6107 | ||
6108 | return 0; | |
6109 | } | |
6110 | \f | |
dfcf069d | 6111 | void |
d0d6b7c5 JB |
6112 | init_process () |
6113 | { | |
6114 | register int i; | |
6115 | ||
6116 | #ifdef SIGCHLD | |
6117 | #ifndef CANNOT_DUMP | |
6118 | if (! noninteractive || initialized) | |
6119 | #endif | |
6120 | signal (SIGCHLD, sigchld_handler); | |
6121 | #endif | |
6122 | ||
6123 | FD_ZERO (&input_wait_mask); | |
a69281ff | 6124 | FD_ZERO (&non_keyboard_wait_mask); |
b5dc1c83 | 6125 | FD_ZERO (&non_process_wait_mask); |
7d0e672e | 6126 | max_process_desc = 0; |
dd2281ae | 6127 | |
a69281ff | 6128 | FD_SET (0, &input_wait_mask); |
dd2281ae | 6129 | |
d0d6b7c5 JB |
6130 | Vprocess_alist = Qnil; |
6131 | for (i = 0; i < MAXDESC; i++) | |
6132 | { | |
6133 | chan_process[i] = Qnil; | |
6134 | proc_buffered_char[i] = -1; | |
6135 | } | |
c7580538 KH |
6136 | bzero (proc_decode_coding_system, sizeof proc_decode_coding_system); |
6137 | bzero (proc_encode_coding_system, sizeof proc_encode_coding_system); | |
e690ca94 KS |
6138 | #ifdef DATAGRAM_SOCKETS |
6139 | bzero (datagram_address, sizeof datagram_address); | |
6140 | #endif | |
d0d6b7c5 | 6141 | } |
312c9964 | 6142 | |
dfcf069d | 6143 | void |
d0d6b7c5 JB |
6144 | syms_of_process () |
6145 | { | |
d0d6b7c5 JB |
6146 | Qprocessp = intern ("processp"); |
6147 | staticpro (&Qprocessp); | |
6148 | Qrun = intern ("run"); | |
6149 | staticpro (&Qrun); | |
6150 | Qstop = intern ("stop"); | |
6151 | staticpro (&Qstop); | |
6152 | Qsignal = intern ("signal"); | |
6153 | staticpro (&Qsignal); | |
6154 | ||
6155 | /* Qexit is already staticpro'd by syms_of_eval; don't staticpro it | |
6156 | here again. | |
6157 | ||
6158 | Qexit = intern ("exit"); | |
6159 | staticpro (&Qexit); */ | |
6160 | ||
6161 | Qopen = intern ("open"); | |
6162 | staticpro (&Qopen); | |
6163 | Qclosed = intern ("closed"); | |
6164 | staticpro (&Qclosed); | |
dd2a17ab KS |
6165 | Qconnect = intern ("connect"); |
6166 | staticpro (&Qconnect); | |
6167 | Qfailed = intern ("failed"); | |
6168 | staticpro (&Qfailed); | |
e690ca94 KS |
6169 | Qlisten = intern ("listen"); |
6170 | staticpro (&Qlisten); | |
6171 | Qlocal = intern ("local"); | |
6172 | staticpro (&Qlocal); | |
6173 | ||
6174 | QCname = intern (":name"); | |
6175 | staticpro (&QCname); | |
6176 | QCbuffer = intern (":buffer"); | |
6177 | staticpro (&QCbuffer); | |
6178 | QChost = intern (":host"); | |
6179 | staticpro (&QChost); | |
6180 | QCservice = intern (":service"); | |
6181 | staticpro (&QCservice); | |
6182 | QCfamily = intern (":family"); | |
6183 | staticpro (&QCfamily); | |
6184 | QClocal = intern (":local"); | |
6185 | staticpro (&QClocal); | |
6186 | QCremote = intern (":remote"); | |
6187 | staticpro (&QCremote); | |
6188 | QCcoding = intern (":coding"); | |
6189 | staticpro (&QCcoding); | |
6190 | QCserver = intern (":server"); | |
6191 | staticpro (&QCserver); | |
6192 | QCdatagram = intern (":datagram"); | |
6193 | staticpro (&QCdatagram); | |
6194 | QCnowait = intern (":nowait"); | |
6195 | staticpro (&QCnowait); | |
6196 | QCfilter = intern (":filter"); | |
6197 | staticpro (&QCfilter); | |
6198 | QCsentinel = intern (":sentinel"); | |
6199 | staticpro (&QCsentinel); | |
6200 | QClog = intern (":log"); | |
6201 | staticpro (&QClog); | |
6202 | QCnoquery = intern (":noquery"); | |
6203 | staticpro (&QCnoquery); | |
6204 | QCstop = intern (":stop"); | |
6205 | staticpro (&QCstop); | |
6206 | QCoptions = intern (":options"); | |
6207 | staticpro (&QCoptions); | |
6208 | QCfeature = intern (":feature"); | |
6209 | staticpro (&QCfeature); | |
6210 | ||
6545aada RS |
6211 | Qlast_nonmenu_event = intern ("last-nonmenu-event"); |
6212 | staticpro (&Qlast_nonmenu_event); | |
6213 | ||
d0d6b7c5 JB |
6214 | staticpro (&Vprocess_alist); |
6215 | ||
6216 | DEFVAR_BOOL ("delete-exited-processes", &delete_exited_processes, | |
fdb82f93 PJ |
6217 | doc: /* *Non-nil means delete processes immediately when they exit. |
6218 | nil means don't delete them until `list-processes' is run. */); | |
d0d6b7c5 JB |
6219 | |
6220 | delete_exited_processes = 1; | |
6221 | ||
6222 | DEFVAR_LISP ("process-connection-type", &Vprocess_connection_type, | |
fdb82f93 PJ |
6223 | doc: /* Control type of device used to communicate with subprocesses. |
6224 | Values are nil to use a pipe, or t or `pty' to use a pty. | |
6225 | The value has no effect if the system has no ptys or if all ptys are busy: | |
6226 | then a pipe is used in any case. | |
6227 | The value takes effect when `start-process' is called. */); | |
d0d6b7c5 JB |
6228 | Vprocess_connection_type = Qt; |
6229 | ||
6230 | defsubr (&Sprocessp); | |
6231 | defsubr (&Sget_process); | |
6232 | defsubr (&Sget_buffer_process); | |
6233 | defsubr (&Sdelete_process); | |
6234 | defsubr (&Sprocess_status); | |
6235 | defsubr (&Sprocess_exit_status); | |
6236 | defsubr (&Sprocess_id); | |
6237 | defsubr (&Sprocess_name); | |
3b9a3dfa | 6238 | defsubr (&Sprocess_tty_name); |
d0d6b7c5 JB |
6239 | defsubr (&Sprocess_command); |
6240 | defsubr (&Sset_process_buffer); | |
6241 | defsubr (&Sprocess_buffer); | |
6242 | defsubr (&Sprocess_mark); | |
6243 | defsubr (&Sset_process_filter); | |
6244 | defsubr (&Sprocess_filter); | |
6245 | defsubr (&Sset_process_sentinel); | |
6246 | defsubr (&Sprocess_sentinel); | |
de282a05 | 6247 | defsubr (&Sset_process_window_size); |
52a1b894 EZ |
6248 | defsubr (&Sset_process_inherit_coding_system_flag); |
6249 | defsubr (&Sprocess_inherit_coding_system_flag); | |
e690ca94 KS |
6250 | defsubr (&Sset_process_query_on_exit_flag); |
6251 | defsubr (&Sprocess_query_on_exit_flag); | |
de282a05 | 6252 | defsubr (&Sprocess_contact); |
d0d6b7c5 JB |
6253 | defsubr (&Slist_processes); |
6254 | defsubr (&Sprocess_list); | |
6255 | defsubr (&Sstart_process); | |
6256 | #ifdef HAVE_SOCKETS | |
e690ca94 KS |
6257 | defsubr (&Sset_network_process_options); |
6258 | defsubr (&Smake_network_process); | |
d0d6b7c5 | 6259 | #endif /* HAVE_SOCKETS */ |
e690ca94 KS |
6260 | #ifdef DATAGRAM_SOCKETS |
6261 | defsubr (&Sprocess_datagram_address); | |
6262 | defsubr (&Sset_process_datagram_address); | |
6263 | #endif | |
d0d6b7c5 JB |
6264 | defsubr (&Saccept_process_output); |
6265 | defsubr (&Sprocess_send_region); | |
6266 | defsubr (&Sprocess_send_string); | |
6267 | defsubr (&Sinterrupt_process); | |
6268 | defsubr (&Skill_process); | |
6269 | defsubr (&Squit_process); | |
6270 | defsubr (&Sstop_process); | |
6271 | defsubr (&Scontinue_process); | |
b81ea5ef | 6272 | defsubr (&Sprocess_running_child_p); |
d0d6b7c5 JB |
6273 | defsubr (&Sprocess_send_eof); |
6274 | defsubr (&Ssignal_process); | |
6275 | defsubr (&Swaiting_for_user_input_p); | |
6276 | /* defsubr (&Sprocess_connection); */ | |
0fa1789e KH |
6277 | defsubr (&Sset_process_coding_system); |
6278 | defsubr (&Sprocess_coding_system); | |
d0d6b7c5 JB |
6279 | } |
6280 | ||
6720a7fb JB |
6281 | \f |
6282 | #else /* not subprocesses */ | |
6283 | ||
6284 | #include <sys/types.h> | |
6285 | #include <errno.h> | |
6286 | ||
6287 | #include "lisp.h" | |
6288 | #include "systime.h" | |
52a1b894 EZ |
6289 | #include "charset.h" |
6290 | #include "coding.h" | |
6720a7fb | 6291 | #include "termopts.h" |
81afb6d1 | 6292 | #include "sysselect.h" |
6720a7fb | 6293 | |
ff11dfa1 | 6294 | extern int frame_garbaged; |
6720a7fb | 6295 | |
f694e5d2 KH |
6296 | extern EMACS_TIME timer_check (); |
6297 | extern int timers_run; | |
6720a7fb JB |
6298 | |
6299 | /* As described above, except assuming that there are no subprocesses: | |
6300 | ||
6301 | Wait for timeout to elapse and/or keyboard input to be available. | |
6302 | ||
6303 | time_limit is: | |
6304 | timeout in seconds, or | |
6305 | zero for no limit, or | |
6306 | -1 means gobble data immediately available but don't wait for any. | |
6307 | ||
f76475ad | 6308 | read_kbd is a Lisp_Object: |
6720a7fb JB |
6309 | 0 to ignore keyboard input, or |
6310 | 1 to return when input is available, or | |
6311 | -1 means caller will actually read the input, so don't throw to | |
6312 | the quit handler. | |
0a65b032 RS |
6313 | a cons cell, meaning wait until its car is non-nil |
6314 | (and gobble terminal input into the buffer if any arrives), or | |
6720a7fb JB |
6315 | We know that read_kbd will never be a Lisp_Process, since |
6316 | `subprocesses' isn't defined. | |
6317 | ||
6318 | do_display != 0 means redisplay should be done to show subprocess | |
5164ee8e | 6319 | output that arrives. |
6720a7fb | 6320 | |
eb8c3be9 | 6321 | Return true iff we received input from any process. */ |
6720a7fb JB |
6322 | |
6323 | int | |
6324 | wait_reading_process_input (time_limit, microsecs, read_kbd, do_display) | |
f76475ad JB |
6325 | int time_limit, microsecs; |
6326 | Lisp_Object read_kbd; | |
6327 | int do_display; | |
6720a7fb | 6328 | { |
52fd88d3 | 6329 | register int nfds; |
f694e5d2 | 6330 | EMACS_TIME end_time, timeout; |
8db121c4 | 6331 | SELECT_TYPE waitchannels; |
f694e5d2 | 6332 | int xerrno; |
f3fbd155 KR |
6333 | /* Either nil or a cons cell, the car of which is of interest and |
6334 | may be changed outside of this routine. */ | |
6335 | Lisp_Object wait_for_cell = Qnil; | |
0a65b032 RS |
6336 | |
6337 | /* If waiting for non-nil in a cell, record where. */ | |
6338 | if (CONSP (read_kbd)) | |
6339 | { | |
f3fbd155 | 6340 | wait_for_cell = read_kbd; |
0a65b032 RS |
6341 | XSETFASTINT (read_kbd, 0); |
6342 | } | |
6720a7fb JB |
6343 | |
6344 | /* What does time_limit really mean? */ | |
6345 | if (time_limit || microsecs) | |
6346 | { | |
6720a7fb | 6347 | EMACS_GET_TIME (end_time); |
52fd88d3 | 6348 | EMACS_SET_SECS_USECS (timeout, time_limit, microsecs); |
6720a7fb JB |
6349 | EMACS_ADD_TIME (end_time, end_time, timeout); |
6350 | } | |
6720a7fb JB |
6351 | |
6352 | /* Turn off periodic alarms (in case they are in use) | |
6353 | because the select emulator uses alarms. */ | |
30904ab7 | 6354 | turn_on_atimers (0); |
6720a7fb | 6355 | |
52fd88d3 | 6356 | while (1) |
6720a7fb | 6357 | { |
bae8d137 | 6358 | int timeout_reduced_for_timers = 0; |
6720a7fb | 6359 | |
6720a7fb JB |
6360 | /* If calling from keyboard input, do not quit |
6361 | since we want to return C-g as an input character. | |
6362 | Otherwise, do pending quit if requested. */ | |
f76475ad | 6363 | if (XINT (read_kbd) >= 0) |
6720a7fb JB |
6364 | QUIT; |
6365 | ||
0a65b032 | 6366 | /* Exit now if the cell we're waiting for became non-nil. */ |
f3fbd155 | 6367 | if (! NILP (wait_for_cell) && ! NILP (XCAR (wait_for_cell))) |
0a65b032 RS |
6368 | break; |
6369 | ||
bae8d137 RS |
6370 | /* Compute time from now till when time limit is up */ |
6371 | /* Exit if already run out */ | |
52fd88d3 EZ |
6372 | if (time_limit == -1) |
6373 | { | |
6374 | /* -1 specified for timeout means | |
6375 | gobble output available now | |
6376 | but don't wait at all. */ | |
6377 | ||
6378 | EMACS_SET_SECS_USECS (timeout, 0, 0); | |
6379 | } | |
6380 | else if (time_limit || microsecs) | |
6720a7fb | 6381 | { |
f694e5d2 KH |
6382 | EMACS_GET_TIME (timeout); |
6383 | EMACS_SUB_TIME (timeout, end_time, timeout); | |
6384 | if (EMACS_TIME_NEG_P (timeout)) | |
6720a7fb JB |
6385 | break; |
6386 | } | |
52fd88d3 EZ |
6387 | else |
6388 | { | |
6389 | EMACS_SET_SECS_USECS (timeout, 100000, 0); | |
6390 | } | |
6720a7fb | 6391 | |
bae8d137 RS |
6392 | /* If our caller will not immediately handle keyboard events, |
6393 | run timer events directly. | |
6394 | (Callers that will immediately read keyboard events | |
6395 | call timer_delay on their own.) */ | |
f3fbd155 | 6396 | if (NILP (wait_for_cell)) |
bae8d137 RS |
6397 | { |
6398 | EMACS_TIME timer_delay; | |
0a65b032 | 6399 | |
9baacf76 | 6400 | do |
0a65b032 | 6401 | { |
9baacf76 GM |
6402 | int old_timers_run = timers_run; |
6403 | timer_delay = timer_check (1); | |
6404 | if (timers_run != old_timers_run && do_display) | |
6405 | /* We must retry, since a timer may have requeued itself | |
6406 | and that could alter the time delay. */ | |
3007ebfb | 6407 | redisplay_preserve_echo_area (14); |
9baacf76 GM |
6408 | else |
6409 | break; | |
0a65b032 | 6410 | } |
9baacf76 | 6411 | while (!detect_input_pending ()); |
0a65b032 | 6412 | |
52fd88d3 EZ |
6413 | /* If there is unread keyboard input, also return. */ |
6414 | if (XINT (read_kbd) != 0 | |
6415 | && requeued_events_pending_p ()) | |
6416 | break; | |
6417 | ||
f694e5d2 | 6418 | if (! EMACS_TIME_NEG_P (timer_delay) && time_limit != -1) |
bae8d137 RS |
6419 | { |
6420 | EMACS_TIME difference; | |
f694e5d2 | 6421 | EMACS_SUB_TIME (difference, timer_delay, timeout); |
bae8d137 RS |
6422 | if (EMACS_TIME_NEG_P (difference)) |
6423 | { | |
f694e5d2 | 6424 | timeout = timer_delay; |
bae8d137 RS |
6425 | timeout_reduced_for_timers = 1; |
6426 | } | |
6427 | } | |
6428 | } | |
6429 | ||
6720a7fb JB |
6430 | /* Cause C-g and alarm signals to take immediate action, |
6431 | and cause input available signals to zero out timeout. */ | |
f76475ad | 6432 | if (XINT (read_kbd) < 0) |
6720a7fb JB |
6433 | set_waiting_for_input (&timeout); |
6434 | ||
0a65b032 RS |
6435 | /* Wait till there is something to do. */ |
6436 | ||
f3fbd155 | 6437 | if (! XINT (read_kbd) && NILP (wait_for_cell)) |
0a65b032 RS |
6438 | FD_ZERO (&waitchannels); |
6439 | else | |
6440 | FD_SET (0, &waitchannels); | |
6441 | ||
ff11dfa1 | 6442 | /* If a frame has been newly mapped and needs updating, |
6720a7fb | 6443 | reprocess its display stuff. */ |
5164ee8e | 6444 | if (frame_garbaged && do_display) |
0a65b032 RS |
6445 | { |
6446 | clear_waiting_for_input (); | |
3007ebfb | 6447 | redisplay_preserve_echo_area (15); |
0a65b032 RS |
6448 | if (XINT (read_kbd) < 0) |
6449 | set_waiting_for_input (&timeout); | |
6450 | } | |
6720a7fb | 6451 | |
1861b214 RS |
6452 | if (XINT (read_kbd) && detect_input_pending ()) |
6453 | { | |
6454 | nfds = 0; | |
6455 | FD_ZERO (&waitchannels); | |
6456 | } | |
6457 | else | |
6458 | nfds = select (1, &waitchannels, (SELECT_TYPE *)0, (SELECT_TYPE *)0, | |
6459 | &timeout); | |
f694e5d2 KH |
6460 | |
6461 | xerrno = errno; | |
6720a7fb JB |
6462 | |
6463 | /* Make C-g and alarm signals set flags again */ | |
6464 | clear_waiting_for_input (); | |
6465 | ||
6466 | /* If we woke up due to SIGWINCH, actually change size now. */ | |
2b653806 | 6467 | do_pending_window_change (0); |
6720a7fb | 6468 | |
f694e5d2 KH |
6469 | if (time_limit && nfds == 0 && ! timeout_reduced_for_timers) |
6470 | /* We waited the full specified time, so return now. */ | |
6471 | break; | |
6472 | ||
6720a7fb JB |
6473 | if (nfds == -1) |
6474 | { | |
6475 | /* If the system call was interrupted, then go around the | |
6476 | loop again. */ | |
f694e5d2 | 6477 | if (xerrno == EINTR) |
8db121c4 | 6478 | FD_ZERO (&waitchannels); |
f694e5d2 | 6479 | else |
68c45bf0 | 6480 | error ("select error: %s", emacs_strerror (xerrno)); |
6720a7fb JB |
6481 | } |
6482 | #ifdef sun | |
6483 | else if (nfds > 0 && (waitchannels & 1) && interrupt_input) | |
6484 | /* System sometimes fails to deliver SIGIO. */ | |
6485 | kill (getpid (), SIGIO); | |
6486 | #endif | |
7324d660 | 6487 | #ifdef SIGIO |
f76475ad | 6488 | if (XINT (read_kbd) && interrupt_input && (waitchannels & 1)) |
e643c5be | 6489 | kill (getpid (), SIGIO); |
7324d660 | 6490 | #endif |
6720a7fb | 6491 | |
f694e5d2 KH |
6492 | /* Check for keyboard input */ |
6493 | ||
78c1afb6 EZ |
6494 | if ((XINT (read_kbd) != 0) |
6495 | && detect_input_pending_run_timers (do_display)) | |
f694e5d2 | 6496 | { |
78c1afb6 | 6497 | swallow_events (do_display); |
f694e5d2 | 6498 | if (detect_input_pending_run_timers (do_display)) |
a2fab450 | 6499 | break; |
78c1afb6 EZ |
6500 | } |
6501 | ||
52fd88d3 EZ |
6502 | /* If there is unread keyboard input, also return. */ |
6503 | if (XINT (read_kbd) != 0 | |
6504 | && requeued_events_pending_p ()) | |
6505 | break; | |
6506 | ||
f854a00b RS |
6507 | /* If wait_for_cell. check for keyboard input |
6508 | but don't run any timers. | |
6509 | ??? (It seems wrong to me to check for keyboard | |
6510 | input at all when wait_for_cell, but the code | |
6511 | has been this way since July 1994. | |
6512 | Try changing this after version 19.31.) */ | |
f3fbd155 | 6513 | if (! NILP (wait_for_cell) |
f854a00b RS |
6514 | && detect_input_pending ()) |
6515 | { | |
6516 | swallow_events (do_display); | |
6517 | if (detect_input_pending ()) | |
6518 | break; | |
6519 | } | |
6520 | ||
0a65b032 | 6521 | /* Exit now if the cell we're waiting for became non-nil. */ |
f3fbd155 | 6522 | if (! NILP (wait_for_cell) && ! NILP (XCAR (wait_for_cell))) |
0a65b032 | 6523 | break; |
6720a7fb JB |
6524 | } |
6525 | ||
a87b802f JB |
6526 | start_polling (); |
6527 | ||
6720a7fb JB |
6528 | return 0; |
6529 | } | |
6530 | ||
6531 | ||
e2ba787b PJ |
6532 | /* Don't confuse make-docfile by having two doc strings for this function. |
6533 | make-docfile does not pay attention to #if, for good reason! */ | |
6720a7fb | 6534 | DEFUN ("get-buffer-process", Fget_buffer_process, Sget_buffer_process, 1, 1, 0, |
fdb82f93 PJ |
6535 | 0) |
6536 | (name) | |
6720a7fb JB |
6537 | register Lisp_Object name; |
6538 | { | |
6539 | return Qnil; | |
6540 | } | |
6541 | ||
e2ba787b PJ |
6542 | /* Don't confuse make-docfile by having two doc strings for this function. |
6543 | make-docfile does not pay attention to #if, for good reason! */ | |
52a1b894 | 6544 | DEFUN ("process-inherit-coding-system-flag", |
fdb82f93 PJ |
6545 | Fprocess_inherit_coding_system_flag, Sprocess_inherit_coding_system_flag, |
6546 | 1, 1, 0, | |
6547 | 0) | |
6548 | (process) | |
52a1b894 EZ |
6549 | register Lisp_Object process; |
6550 | { | |
6551 | /* Ignore the argument and return the value of | |
6552 | inherit-process-coding-system. */ | |
6553 | return inherit_process_coding_system ? Qt : Qnil; | |
6554 | } | |
6555 | ||
6720a7fb JB |
6556 | /* Kill all processes associated with `buffer'. |
6557 | If `buffer' is nil, kill all processes. | |
6558 | Since we have no subprocesses, this does nothing. */ | |
6559 | ||
d9bb0c32 | 6560 | void |
6720a7fb JB |
6561 | kill_buffer_processes (buffer) |
6562 | Lisp_Object buffer; | |
6563 | { | |
6564 | } | |
6565 | ||
02b9b4fd | 6566 | void |
6720a7fb JB |
6567 | init_process () |
6568 | { | |
6569 | } | |
6570 | ||
02b9b4fd | 6571 | void |
6720a7fb JB |
6572 | syms_of_process () |
6573 | { | |
6574 | defsubr (&Sget_buffer_process); | |
52a1b894 | 6575 | defsubr (&Sprocess_inherit_coding_system_flag); |
6720a7fb JB |
6576 | } |
6577 | ||
6578 | \f | |
6579 | #endif /* not subprocesses */ |