Commit | Line | Data |
---|---|---|
efb859b4 | 1 | /* Client process that communicates with GNU Emacs acting as server. |
de073ce3 GM |
2 | Copyright (C) 1986, 1987, 1994, 1999, 2000, 2001 |
3 | Free Software Foundation, Inc. | |
46cec291 RS |
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 | |
92af894f | 9 | the Free Software Foundation; either version 2, or (at your option) |
46cec291 RS |
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. */ | |
46cec291 RS |
21 | |
22 | ||
23 | #define NO_SHORTNAMES | |
e69233c2 PJ |
24 | |
25 | #ifdef HAVE_CONFIG_H | |
2f8fe2f4 | 26 | #include <config.h> |
e69233c2 PJ |
27 | #endif |
28 | ||
4e23f2ba | 29 | #undef signal |
46cec291 | 30 | |
e69233c2 | 31 | #include <ctype.h> |
8f9aaa0a RS |
32 | #include <stdio.h> |
33 | #include <getopt.h> | |
79f13bba DL |
34 | #ifdef HAVE_UNISTD_H |
35 | #include <unistd.h> | |
36 | #endif | |
8f9aaa0a | 37 | |
9f637eea GM |
38 | #ifdef VMS |
39 | # include "vms-pwd.h" | |
40 | #else | |
41 | # include <pwd.h> | |
42 | #endif /* not VMS */ | |
43 | ||
8f9aaa0a RS |
44 | char *getenv (), *getwd (); |
45 | char *getcwd (); | |
8f9aaa0a RS |
46 | |
47 | /* This is defined with -D from the compilation command, | |
48 | which extracts it from ../lisp/version.el. */ | |
49 | ||
50 | #ifndef VERSION | |
51 | #define VERSION "unspecified" | |
52 | #endif | |
53 | \f | |
54 | /* Name used to invoke this program. */ | |
55 | char *progname; | |
56 | ||
749ae770 | 57 | /* Nonzero means don't wait for a response from Emacs. --no-wait. */ |
8f9aaa0a RS |
58 | int nowait = 0; |
59 | ||
7f3bff3e AS |
60 | void print_help_and_exit (); |
61 | ||
8f9aaa0a RS |
62 | struct option longopts[] = |
63 | { | |
749ae770 | 64 | { "no-wait", no_argument, NULL, 'n' }, |
8f9aaa0a RS |
65 | { "help", no_argument, NULL, 'H' }, |
66 | { "version", no_argument, NULL, 'V' }, | |
97e3214d | 67 | { "alternate-editor",required_argument, NULL, 'a' }, |
8f9aaa0a RS |
68 | { 0 } |
69 | }; | |
70 | ||
97e3214d GM |
71 | |
72 | const char * alternate_editor = NULL; | |
73 | ||
8f9aaa0a | 74 | /* Decode the options from argv and argc. |
5212210c | 75 | The global variable `optind' will say how many arguments we used up. */ |
8f9aaa0a | 76 | |
5212210c | 77 | void |
8f9aaa0a RS |
78 | decode_options (argc, argv) |
79 | int argc; | |
80 | char **argv; | |
81 | { | |
82 | while (1) | |
83 | { | |
84 | int opt = getopt_long (argc, argv, | |
97e3214d | 85 | "VHna:", longopts, 0); |
8f9aaa0a RS |
86 | |
87 | if (opt == EOF) | |
88 | break; | |
89 | ||
97e3214d | 90 | alternate_editor = getenv ("ALTERNATE_EDITOR"); |
e69233c2 | 91 | |
8f9aaa0a RS |
92 | switch (opt) |
93 | { | |
94 | case 0: | |
95 | /* If getopt returns 0, then it has already processed a | |
96 | long-named option. We should do nothing. */ | |
97 | break; | |
e69233c2 | 98 | |
97e3214d GM |
99 | case 'a': |
100 | alternate_editor = optarg; | |
101 | break; | |
e69233c2 | 102 | |
8f9aaa0a RS |
103 | case 'n': |
104 | nowait = 1; | |
105 | break; | |
106 | ||
107 | case 'V': | |
b4e94f42 | 108 | fprintf (stderr, "emacsclient %s\n", VERSION); |
8f9aaa0a RS |
109 | exit (1); |
110 | break; | |
46cec291 | 111 | |
8f9aaa0a RS |
112 | case 'H': |
113 | default: | |
114 | print_help_and_exit (); | |
115 | } | |
116 | } | |
8f9aaa0a RS |
117 | } |
118 | ||
7f3bff3e | 119 | void |
8f9aaa0a RS |
120 | print_help_and_exit () |
121 | { | |
122 | fprintf (stderr, | |
8b8f50f8 | 123 | "Usage: %s [-a ALTERNATE-EDITOR] [-n] [--no-wait] [+LINE[:COLUMN]] FILENAME\n", |
8f9aaa0a | 124 | progname); |
4852ed0e RS |
125 | fprintf (stderr, |
126 | "Or %s --version\n", | |
127 | progname); | |
8f9aaa0a | 128 | fprintf (stderr, |
b4e94f42 | 129 | "Report bugs to bug-gnu-emacs@gnu.org.\n"); |
8f9aaa0a RS |
130 | exit (1); |
131 | } | |
5212210c | 132 | |
f1db6a73 RS |
133 | /* Return a copy of NAME, inserting a & |
134 | before each &, each space, and any initial -. | |
5212210c RS |
135 | Change spaces to underscores, too, so that the |
136 | return value never contains a space. */ | |
137 | ||
138 | char * | |
139 | quote_file_name (name) | |
140 | char *name; | |
141 | { | |
142 | char *copy = (char *) malloc (strlen (name) * 2 + 1); | |
143 | char *p, *q; | |
144 | ||
145 | p = name; | |
146 | q = copy; | |
147 | while (*p) | |
148 | { | |
149 | if (*p == ' ') | |
150 | { | |
f1db6a73 | 151 | *q++ = '&'; |
5212210c RS |
152 | *q++ = '_'; |
153 | p++; | |
154 | } | |
155 | else | |
156 | { | |
f1db6a73 RS |
157 | if (*p == '&' || (*p == '-' && p == name)) |
158 | *q++ = '&'; | |
5212210c RS |
159 | *q++ = *p++; |
160 | } | |
161 | } | |
f1db6a73 | 162 | *q++ = 0; |
5212210c RS |
163 | |
164 | return copy; | |
165 | } | |
0c76956f | 166 | |
0c76956f RS |
167 | /* Like malloc but get fatal error if memory is exhausted. */ |
168 | ||
5497dfdb | 169 | long * |
0c76956f RS |
170 | xmalloc (size) |
171 | unsigned int size; | |
172 | { | |
5f32a712 | 173 | long *result = (long *) malloc (size); |
0c76956f RS |
174 | if (result == NULL) |
175 | { | |
176 | perror ("malloc"); | |
177 | exit (1); | |
178 | } | |
179 | return result; | |
180 | } | |
8f9aaa0a | 181 | \f |
97e3214d GM |
182 | /* |
183 | Try to run a different command, or --if no alternate editor is | |
184 | defined-- exit with an errorcode. | |
185 | */ | |
de073ce3 | 186 | void |
97e3214d GM |
187 | fail (argc, argv) |
188 | int argc; | |
189 | char **argv; | |
190 | { | |
191 | if (alternate_editor) | |
192 | { | |
193 | int i = optind -1 ; | |
194 | execvp (alternate_editor, argv + i); | |
23431241 | 195 | return; |
97e3214d GM |
196 | } |
197 | else | |
198 | { | |
199 | exit (1); | |
200 | } | |
201 | } | |
202 | ||
203 | ||
97e3214d | 204 | \f |
b135a7cf | 205 | #if !defined (HAVE_SOCKETS) && !defined (HAVE_SYSVIPC) |
46cec291 | 206 | |
de073ce3 | 207 | int |
46cec291 RS |
208 | main (argc, argv) |
209 | int argc; | |
210 | char **argv; | |
211 | { | |
212 | fprintf (stderr, "%s: Sorry, the Emacs server is supported only\n", | |
213 | argv[0]); | |
214 | fprintf (stderr, "on systems with Berkeley sockets or System V IPC.\n"); | |
97e3214d GM |
215 | |
216 | fail (argc, argv); | |
46cec291 RS |
217 | } |
218 | ||
219 | #else /* HAVE_SOCKETS or HAVE_SYSVIPC */ | |
220 | ||
1e523e3d | 221 | #if defined (HAVE_SOCKETS) && ! defined (NO_SOCKETS_IN_FILE_SYSTEM) |
46cec291 RS |
222 | /* BSD code is very different from SYSV IPC code */ |
223 | ||
224 | #include <sys/types.h> | |
225 | #include <sys/socket.h> | |
226 | #include <sys/un.h> | |
efb859b4 | 227 | #include <sys/stat.h> |
46cec291 RS |
228 | #include <errno.h> |
229 | ||
92af894f | 230 | extern char *strerror (); |
46cec291 RS |
231 | extern int errno; |
232 | ||
9f637eea GM |
233 | /* Three possibilities: |
234 | 2 - can't be `stat'ed (sets errno) | |
235 | 1 - isn't owned by us | |
236 | 0 - success: none of the above */ | |
237 | ||
238 | static int | |
239 | socket_status (socket_name) | |
240 | char *socket_name; | |
241 | { | |
242 | struct stat statbfr; | |
243 | ||
244 | if (stat (socket_name, &statbfr) == -1) | |
245 | return 2; | |
246 | ||
247 | if (statbfr.st_uid != geteuid ()) | |
248 | return 1; | |
249 | ||
250 | return 0; | |
251 | } | |
252 | ||
340ff9de | 253 | int |
46cec291 RS |
254 | main (argc, argv) |
255 | int argc; | |
256 | char **argv; | |
257 | { | |
a2b3f2b5 RS |
258 | char *system_name; |
259 | int system_name_length; | |
46cec291 | 260 | int s, i; |
23a7488d | 261 | FILE *out, *in; |
46cec291 | 262 | struct sockaddr_un server; |
571512de EZ |
263 | #ifdef SERVER_HOME_DIR |
264 | char *homedir; | |
265 | #endif | |
266 | char *cwd, *str; | |
46cec291 | 267 | char string[BUFSIZ]; |
8f9aaa0a RS |
268 | |
269 | progname = argv[0]; | |
46cec291 | 270 | |
8f9aaa0a | 271 | /* Process options. */ |
5212210c | 272 | decode_options (argc, argv); |
46cec291 | 273 | |
5212210c | 274 | if (argc - optind < 1) |
8f9aaa0a | 275 | print_help_and_exit (); |
46cec291 | 276 | |
e69233c2 | 277 | /* |
46cec291 RS |
278 | * Open up an AF_UNIX socket in this person's home directory |
279 | */ | |
280 | ||
281 | if ((s = socket (AF_UNIX, SOCK_STREAM, 0)) < 0) | |
282 | { | |
283 | fprintf (stderr, "%s: ", argv[0]); | |
284 | perror ("socket"); | |
97e3214d | 285 | fail (argc, argv); |
46cec291 | 286 | } |
e69233c2 | 287 | |
46cec291 | 288 | server.sun_family = AF_UNIX; |
c5fee545 | 289 | |
efb859b4 | 290 | { |
a2b3f2b5 RS |
291 | system_name_length = 32; |
292 | ||
293 | while (1) | |
294 | { | |
295 | system_name = (char *) xmalloc (system_name_length + 1); | |
296 | ||
297 | /* system_name must be null-terminated string. */ | |
298 | system_name[system_name_length] = '\0'; | |
299 | ||
300 | if (gethostname (system_name, system_name_length) == 0) | |
301 | break; | |
302 | ||
303 | free (system_name); | |
304 | system_name_length *= 2; | |
305 | } | |
c5fee545 KH |
306 | } |
307 | ||
308 | #ifndef SERVER_HOME_DIR | |
309 | { | |
9f637eea | 310 | int sock_status = 0; |
efb859b4 | 311 | |
23431241 | 312 | sprintf (server.sun_path, "/tmp/esrv%d-%s", (int) geteuid (), system_name); |
efb859b4 | 313 | |
9f637eea GM |
314 | /* See if the socket exists, and if it's owned by us. */ |
315 | sock_status = socket_status (server.sun_path); | |
316 | if (sock_status) | |
efb859b4 | 317 | { |
9f637eea GM |
318 | /* Failing that, see if LOGNAME or USER exist and differ from |
319 | our euid. If so, look for a socket based on the UID | |
320 | associated with the name. This is reminiscent of the logic | |
321 | that init_editfns uses to set the global Vuser_full_name. */ | |
e69233c2 | 322 | |
9f637eea GM |
323 | char *user_name = (char *) getenv ("LOGNAME"); |
324 | if (!user_name) | |
325 | user_name = (char *) getenv ("USER"); | |
e69233c2 | 326 | |
9f637eea GM |
327 | if (user_name) |
328 | { | |
329 | struct passwd *pw = getpwnam (user_name); | |
330 | if (pw && (pw->pw_uid != geteuid ())) | |
331 | { | |
332 | /* We're running under su, apparently. */ | |
333 | sprintf (server.sun_path, "/tmp/esrv%d-%s", | |
23431241 | 334 | (int) pw->pw_uid, system_name); |
9f637eea GM |
335 | sock_status = socket_status (server.sun_path); |
336 | } | |
337 | } | |
efb859b4 | 338 | } |
e69233c2 | 339 | |
9f637eea GM |
340 | switch (sock_status) |
341 | { | |
342 | case 1: | |
343 | /* There's a socket, but it isn't owned by us. This is OK if | |
344 | we are root. */ | |
345 | if (0 != geteuid ()) | |
346 | { | |
347 | fprintf (stderr, "%s: Invalid socket owner\n", argv[0]); | |
348 | fail (argc, argv); | |
349 | } | |
350 | break; | |
e69233c2 | 351 | |
9f637eea GM |
352 | case 2: |
353 | /* `stat' failed */ | |
354 | if (errno == ENOENT) | |
355 | fprintf (stderr, | |
356 | "%s: can't find socket; have you started the server?\n", | |
357 | argv[0]); | |
358 | else | |
359 | fprintf (stderr, "%s: can't stat %s: %s\n", | |
360 | argv[0], server.sun_path, strerror (errno)); | |
361 | fail (argc, argv); | |
362 | break; | |
363 | } | |
efb859b4 | 364 | } |
46cec291 RS |
365 | #else |
366 | if ((homedir = getenv ("HOME")) == NULL) | |
367 | { | |
368 | fprintf (stderr, "%s: No home directory\n", argv[0]); | |
97e3214d | 369 | fail (argc, argv); |
46cec291 RS |
370 | } |
371 | strcpy (server.sun_path, homedir); | |
b135a7cf | 372 | strcat (server.sun_path, "/.emacs-server-"); |
b135a7cf | 373 | strcat (server.sun_path, system_name); |
46cec291 RS |
374 | #endif |
375 | ||
4e23f2ba JB |
376 | if (connect (s, (struct sockaddr *) &server, strlen (server.sun_path) + 2) |
377 | < 0) | |
46cec291 RS |
378 | { |
379 | fprintf (stderr, "%s: ", argv[0]); | |
380 | perror ("connect"); | |
97e3214d | 381 | fail (argc, argv); |
46cec291 | 382 | } |
23a7488d RS |
383 | |
384 | /* We use the stream OUT to send our command to the server. */ | |
46cec291 RS |
385 | if ((out = fdopen (s, "r+")) == NULL) |
386 | { | |
387 | fprintf (stderr, "%s: ", argv[0]); | |
388 | perror ("fdopen"); | |
97e3214d | 389 | fail (argc, argv); |
46cec291 RS |
390 | } |
391 | ||
23a7488d RS |
392 | /* We use the stream IN to read the response. |
393 | We used to use just one stream for both output and input | |
394 | on the socket, but reversing direction works nonportably: | |
395 | on some systems, the output appears as the first input; | |
396 | on other systems it does not. */ | |
397 | if ((in = fdopen (s, "r+")) == NULL) | |
398 | { | |
399 | fprintf (stderr, "%s: ", argv[0]); | |
400 | perror ("fdopen"); | |
97e3214d | 401 | fail (argc, argv); |
23a7488d RS |
402 | } |
403 | ||
e397a017 | 404 | #ifdef BSD_SYSTEM |
46cec291 | 405 | cwd = getwd (string); |
ee6a193c RS |
406 | #else |
407 | cwd = getcwd (string, sizeof string); | |
408 | #endif | |
46cec291 RS |
409 | if (cwd == 0) |
410 | { | |
411 | /* getwd puts message in STRING if it fails. */ | |
bd252662 RS |
412 | fprintf (stderr, "%s: %s (%s)\n", argv[0], |
413 | #ifdef BSD_SYSTEM | |
414 | string, | |
415 | #else | |
416 | "Cannot get current working directory", | |
417 | #endif | |
418 | strerror (errno)); | |
97e3214d | 419 | fail (argc, argv); |
46cec291 RS |
420 | } |
421 | ||
5212210c RS |
422 | if (nowait) |
423 | fprintf (out, "-nowait "); | |
292d74a3 | 424 | |
5212210c RS |
425 | for (i = optind; i < argc; i++) |
426 | { | |
46cec291 RS |
427 | if (*argv[i] == '+') |
428 | { | |
429 | char *p = argv[i] + 1; | |
cb1cdedd | 430 | while (isdigit ((unsigned char) *p) || *p == ':') p++; |
46cec291 | 431 | if (*p != 0) |
0343a017 | 432 | fprintf (out, "%s/", quote_file_name (cwd)); |
46cec291 RS |
433 | } |
434 | else if (*argv[i] != '/') | |
0343a017 | 435 | fprintf (out, "%s/", quote_file_name (cwd)); |
5212210c RS |
436 | |
437 | fprintf (out, "%s ", quote_file_name (argv[i])); | |
46cec291 RS |
438 | } |
439 | fprintf (out, "\n"); | |
440 | fflush (out); | |
441 | ||
292d74a3 RS |
442 | /* Maybe wait for an answer. */ |
443 | if (nowait) | |
444 | return 0; | |
445 | ||
46cec291 RS |
446 | printf ("Waiting for Emacs..."); |
447 | fflush (stdout); | |
448 | ||
23a7488d RS |
449 | /* Now, wait for an answer and print any messages. On some systems, |
450 | the first line we read will actually be the output we just sent. | |
451 | We can't predict whether that will happen, so if it does, we | |
452 | detect it by recognizing `Client: ' at the beginning. */ | |
e69233c2 PJ |
453 | |
454 | while ((str = fgets (string, BUFSIZ, in))) | |
46cec291 | 455 | printf ("%s", str); |
23a7488d | 456 | |
340ff9de | 457 | return 0; |
46cec291 RS |
458 | } |
459 | ||
460 | #else /* This is the SYSV IPC section */ | |
461 | ||
462 | #include <sys/types.h> | |
463 | #include <sys/ipc.h> | |
464 | #include <sys/msg.h> | |
b135a7cf | 465 | #include <sys/utsname.h> |
46cec291 | 466 | #include <stdio.h> |
bd252662 RS |
467 | #include <errno.h> |
468 | extern int errno; | |
46cec291 | 469 | |
1518a9eb | 470 | char *getwd (), *getcwd (), *getenv (); |
b135a7cf | 471 | struct utsname system_name; |
1518a9eb | 472 | |
46cec291 RS |
473 | main (argc, argv) |
474 | int argc; | |
475 | char **argv; | |
476 | { | |
477 | int s; | |
478 | key_t key; | |
1518a9eb RS |
479 | /* Size of text allocated in MSGP. */ |
480 | int size_allocated = BUFSIZ; | |
481 | /* Amount of text used in MSGP. */ | |
482 | int used; | |
483 | struct msgbuf *msgp | |
484 | = (struct msgbuf *) malloc (sizeof (struct msgbuf) + size_allocated); | |
46cec291 RS |
485 | struct msqid_ds * msg_st; |
486 | char *homedir, buf[BUFSIZ]; | |
487 | char gwdirb[BUFSIZ]; | |
488 | char *cwd; | |
489 | char *temp; | |
8f9aaa0a RS |
490 | |
491 | progname = argv[0]; | |
492 | ||
493 | /* Process options. */ | |
5212210c | 494 | decode_options (argc, argv); |
46cec291 | 495 | |
5212210c | 496 | if (argc - optind < 1) |
8f9aaa0a | 497 | print_help_and_exit (); |
46cec291 RS |
498 | |
499 | /* | |
b135a7cf | 500 | * Create a message queue using ~/.emacs-server as the path for ftok |
46cec291 RS |
501 | */ |
502 | if ((homedir = getenv ("HOME")) == NULL) | |
503 | { | |
504 | fprintf (stderr, "%s: No home directory\n", argv[0]); | |
505 | exit (1); | |
506 | } | |
507 | strcpy (buf, homedir); | |
b135a7cf RS |
508 | #ifndef HAVE_LONG_FILE_NAMES |
509 | /* If file names are short, we can't fit the host name. */ | |
510 | strcat (buf, "/.emacs-server"); | |
511 | #else | |
512 | strcat (buf, "/.emacs-server-"); | |
513 | uname (&system_name); | |
514 | strcat (buf, system_name.nodename); | |
515 | #endif | |
46cec291 RS |
516 | creat (buf, 0600); |
517 | key = ftok (buf, 1); /* unlikely to be anyone else using it */ | |
61a93162 | 518 | s = msgget (key, 0600 | IPC_CREAT); |
46cec291 RS |
519 | if (s == -1) |
520 | { | |
521 | fprintf (stderr, "%s: ", argv[0]); | |
522 | perror ("msgget"); | |
523 | exit (1); | |
524 | } | |
525 | ||
526 | /* Determine working dir, so we can prefix it to all the arguments. */ | |
e397a017 | 527 | #ifdef BSD_SYSTEM |
46cec291 RS |
528 | temp = getwd (gwdirb); |
529 | #else | |
530 | temp = getcwd (gwdirb, sizeof gwdirb); | |
531 | #endif | |
532 | ||
533 | cwd = gwdirb; | |
534 | if (temp != 0) | |
535 | { | |
536 | /* On some systems, cwd can look like `@machine/...'; | |
537 | ignore everything before the first slash in such a case. */ | |
538 | while (*cwd && *cwd != '/') | |
539 | cwd++; | |
540 | strcat (cwd, "/"); | |
541 | } | |
542 | else | |
543 | { | |
bd252662 | 544 | #ifdef BSD_SYSTEM |
26396b1b | 545 | fprintf (stderr, "%s: %s\n", argv[0], cwd); |
bd252662 RS |
546 | #else |
547 | fprintf (stderr, "%s: Cannot get current working directory: %s\n", | |
548 | argv[0], strerror (errno)); | |
549 | #endif | |
97e3214d | 550 | fail (argc, argv); |
46cec291 RS |
551 | } |
552 | ||
553 | msgp->mtext[0] = 0; | |
1518a9eb | 554 | used = 0; |
5212210c RS |
555 | |
556 | if (nowait) | |
557 | { | |
558 | strcat (msgp->mtext, "-nowait "); | |
559 | used += 8; | |
560 | } | |
561 | ||
562 | argc -= optind; | |
563 | argv += optind; | |
564 | ||
46cec291 RS |
565 | while (argc) |
566 | { | |
1518a9eb | 567 | int need_cwd = 0; |
cd33a5a0 | 568 | char *modified_arg = argv[0]; |
292d74a3 | 569 | |
5212210c | 570 | if (*modified_arg == '+') |
46cec291 | 571 | { |
cd33a5a0 | 572 | char *p = modified_arg + 1; |
8b8f50f8 GM |
573 | while (isdigit (*p) || *p == ':') |
574 | p++; | |
46cec291 | 575 | if (*p != 0) |
1518a9eb | 576 | need_cwd = 1; |
46cec291 | 577 | } |
cd33a5a0 | 578 | else if (*modified_arg != '/') |
1518a9eb RS |
579 | need_cwd = 1; |
580 | ||
5212210c RS |
581 | modified_arg = quote_file_name (modified_arg); |
582 | ||
1518a9eb | 583 | if (need_cwd) |
0343a017 KH |
584 | /* Overestimate in case we have to quote something in CWD. */ |
585 | used += 2 * strlen (cwd); | |
cd33a5a0 | 586 | used += strlen (modified_arg) + 1; |
1518a9eb RS |
587 | while (used + 2 > size_allocated) |
588 | { | |
589 | size_allocated *= 2; | |
590 | msgp = (struct msgbuf *) realloc (msgp, | |
591 | (sizeof (struct msgbuf) | |
592 | + size_allocated)); | |
593 | } | |
594 | ||
595 | if (need_cwd) | |
0343a017 | 596 | strcat (msgp->mtext, quote_file_name (cwd)); |
46cec291 | 597 | |
cd33a5a0 | 598 | strcat (msgp->mtext, modified_arg); |
46cec291 RS |
599 | strcat (msgp->mtext, " "); |
600 | argv++; argc--; | |
601 | } | |
602 | strcat (msgp->mtext, "\n"); | |
1518a9eb RS |
603 | #ifdef HPUX /* HPUX has a bug. */ |
604 | if (strlen (msgp->mtext) >= 512) | |
605 | { | |
18a2fa91 | 606 | fprintf (stderr, "%s: args too long for msgsnd\n", progname); |
97e3214d | 607 | fail (argc, argv); |
1518a9eb RS |
608 | } |
609 | #endif | |
46cec291 RS |
610 | msgp->mtype = 1; |
611 | if (msgsnd (s, msgp, strlen (msgp->mtext)+1, 0) < 0) | |
612 | { | |
defb80d7 | 613 | fprintf (stderr, "%s: ", progname); |
46cec291 | 614 | perror ("msgsnd"); |
97e3214d | 615 | fail (argc, argv); |
46cec291 | 616 | } |
292d74a3 RS |
617 | |
618 | /* Maybe wait for an answer. */ | |
619 | if (nowait) | |
620 | return 0; | |
621 | ||
46cec291 RS |
622 | printf ("Waiting for Emacs..."); |
623 | fflush (stdout); | |
624 | ||
625 | msgrcv (s, msgp, BUFSIZ, getpid (), 0); /* wait for anything back */ | |
626 | strcpy (buf, msgp->mtext); | |
627 | ||
dc3c30fe KH |
628 | printf ("\n"); |
629 | if (*buf) | |
630 | printf ("%s\n", buf); | |
46cec291 RS |
631 | exit (0); |
632 | } | |
633 | ||
634 | #endif /* HAVE_SYSVIPC */ | |
635 | ||
636 | #endif /* HAVE_SOCKETS or HAVE_SYSVIPC */ | |
27711600 RM |
637 | \f |
638 | #ifndef HAVE_STRERROR | |
639 | char * | |
640 | strerror (errnum) | |
641 | int errnum; | |
642 | { | |
643 | extern char *sys_errlist[]; | |
644 | extern int sys_nerr; | |
645 | ||
646 | if (errnum >= 0 && errnum < sys_nerr) | |
647 | return sys_errlist[errnum]; | |
648 | return (char *) "Unknown error"; | |
649 | } | |
650 | ||
651 | #endif /* ! HAVE_STRERROR */ |