Commit | Line | Data |
---|---|---|
efb859b4 | 1 | /* Client process that communicates with GNU Emacs acting as server. |
4ee9629e | 2 | Copyright (C) 1986, 1987, 1994, 1999 Free Software Foundation, Inc. |
46cec291 RS |
3 | |
4 | This file is part of GNU Emacs. | |
5 | ||
6 | GNU Emacs is free software; you can redistribute it and/or modify | |
7 | it under the terms of the GNU General Public License as published by | |
92af894f | 8 | the Free Software Foundation; either version 2, or (at your option) |
46cec291 RS |
9 | any later version. |
10 | ||
11 | GNU Emacs is distributed in the hope that it will be useful, | |
12 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
14 | GNU General Public License for more details. | |
15 | ||
16 | You should have received a copy of the GNU General Public License | |
17 | along with GNU Emacs; see the file COPYING. If not, write to | |
3b7ad313 EN |
18 | the Free Software Foundation, Inc., 59 Temple Place - Suite 330, |
19 | Boston, MA 02111-1307, USA. */ | |
46cec291 RS |
20 | |
21 | ||
22 | #define NO_SHORTNAMES | |
18160b98 | 23 | #include <../src/config.h> |
4e23f2ba | 24 | #undef signal |
46cec291 | 25 | |
8f9aaa0a RS |
26 | #include <stdio.h> |
27 | #include <getopt.h> | |
79f13bba DL |
28 | #ifdef HAVE_UNISTD_H |
29 | #include <unistd.h> | |
30 | #endif | |
8f9aaa0a RS |
31 | |
32 | char *getenv (), *getwd (); | |
33 | char *getcwd (); | |
8f9aaa0a RS |
34 | |
35 | /* This is defined with -D from the compilation command, | |
36 | which extracts it from ../lisp/version.el. */ | |
37 | ||
38 | #ifndef VERSION | |
39 | #define VERSION "unspecified" | |
40 | #endif | |
41 | \f | |
42 | /* Name used to invoke this program. */ | |
43 | char *progname; | |
44 | ||
749ae770 | 45 | /* Nonzero means don't wait for a response from Emacs. --no-wait. */ |
8f9aaa0a RS |
46 | int nowait = 0; |
47 | ||
7f3bff3e AS |
48 | void print_help_and_exit (); |
49 | ||
8f9aaa0a RS |
50 | struct option longopts[] = |
51 | { | |
749ae770 | 52 | { "no-wait", no_argument, NULL, 'n' }, |
8f9aaa0a RS |
53 | { "help", no_argument, NULL, 'H' }, |
54 | { "version", no_argument, NULL, 'V' }, | |
55 | { 0 } | |
56 | }; | |
57 | ||
58 | /* Decode the options from argv and argc. | |
5212210c | 59 | The global variable `optind' will say how many arguments we used up. */ |
8f9aaa0a | 60 | |
5212210c | 61 | void |
8f9aaa0a RS |
62 | decode_options (argc, argv) |
63 | int argc; | |
64 | char **argv; | |
65 | { | |
66 | while (1) | |
67 | { | |
68 | int opt = getopt_long (argc, argv, | |
69 | "VHn", longopts, 0); | |
70 | ||
71 | if (opt == EOF) | |
72 | break; | |
73 | ||
74 | switch (opt) | |
75 | { | |
76 | case 0: | |
77 | /* If getopt returns 0, then it has already processed a | |
78 | long-named option. We should do nothing. */ | |
79 | break; | |
80 | ||
81 | case 'n': | |
82 | nowait = 1; | |
83 | break; | |
84 | ||
85 | case 'V': | |
b4e94f42 | 86 | fprintf (stderr, "emacsclient %s\n", VERSION); |
8f9aaa0a RS |
87 | exit (1); |
88 | break; | |
46cec291 | 89 | |
8f9aaa0a RS |
90 | case 'H': |
91 | default: | |
92 | print_help_and_exit (); | |
93 | } | |
94 | } | |
8f9aaa0a RS |
95 | } |
96 | ||
7f3bff3e | 97 | void |
8f9aaa0a RS |
98 | print_help_and_exit () |
99 | { | |
100 | fprintf (stderr, | |
749ae770 | 101 | "Usage: %s [-n] [--no-wait] [+LINENUMBER] FILENAME\n", |
8f9aaa0a | 102 | progname); |
4852ed0e RS |
103 | fprintf (stderr, |
104 | "Or %s --version\n", | |
105 | progname); | |
8f9aaa0a | 106 | fprintf (stderr, |
b4e94f42 | 107 | "Report bugs to bug-gnu-emacs@gnu.org.\n"); |
8f9aaa0a RS |
108 | exit (1); |
109 | } | |
5212210c | 110 | |
f1db6a73 RS |
111 | /* Return a copy of NAME, inserting a & |
112 | before each &, each space, and any initial -. | |
5212210c RS |
113 | Change spaces to underscores, too, so that the |
114 | return value never contains a space. */ | |
115 | ||
116 | char * | |
117 | quote_file_name (name) | |
118 | char *name; | |
119 | { | |
120 | char *copy = (char *) malloc (strlen (name) * 2 + 1); | |
121 | char *p, *q; | |
122 | ||
123 | p = name; | |
124 | q = copy; | |
125 | while (*p) | |
126 | { | |
127 | if (*p == ' ') | |
128 | { | |
f1db6a73 | 129 | *q++ = '&'; |
5212210c RS |
130 | *q++ = '_'; |
131 | p++; | |
132 | } | |
133 | else | |
134 | { | |
f1db6a73 RS |
135 | if (*p == '&' || (*p == '-' && p == name)) |
136 | *q++ = '&'; | |
5212210c RS |
137 | *q++ = *p++; |
138 | } | |
139 | } | |
f1db6a73 | 140 | *q++ = 0; |
5212210c RS |
141 | |
142 | return copy; | |
143 | } | |
0c76956f | 144 | |
0c76956f RS |
145 | /* Like malloc but get fatal error if memory is exhausted. */ |
146 | ||
5497dfdb | 147 | long * |
0c76956f RS |
148 | xmalloc (size) |
149 | unsigned int size; | |
150 | { | |
5f32a712 | 151 | long *result = (long *) malloc (size); |
0c76956f RS |
152 | if (result == NULL) |
153 | { | |
154 | perror ("malloc"); | |
155 | exit (1); | |
156 | } | |
157 | return result; | |
158 | } | |
8f9aaa0a | 159 | \f |
b135a7cf | 160 | #if !defined (HAVE_SOCKETS) && !defined (HAVE_SYSVIPC) |
46cec291 RS |
161 | |
162 | main (argc, argv) | |
163 | int argc; | |
164 | char **argv; | |
165 | { | |
166 | fprintf (stderr, "%s: Sorry, the Emacs server is supported only\n", | |
167 | argv[0]); | |
168 | fprintf (stderr, "on systems with Berkeley sockets or System V IPC.\n"); | |
169 | exit (1); | |
170 | } | |
171 | ||
172 | #else /* HAVE_SOCKETS or HAVE_SYSVIPC */ | |
173 | ||
1e523e3d | 174 | #if defined (HAVE_SOCKETS) && ! defined (NO_SOCKETS_IN_FILE_SYSTEM) |
46cec291 RS |
175 | /* BSD code is very different from SYSV IPC code */ |
176 | ||
177 | #include <sys/types.h> | |
178 | #include <sys/socket.h> | |
179 | #include <sys/un.h> | |
efb859b4 | 180 | #include <sys/stat.h> |
46cec291 RS |
181 | #include <errno.h> |
182 | ||
92af894f | 183 | extern char *strerror (); |
46cec291 RS |
184 | extern int errno; |
185 | ||
340ff9de | 186 | int |
46cec291 RS |
187 | main (argc, argv) |
188 | int argc; | |
189 | char **argv; | |
190 | { | |
a2b3f2b5 RS |
191 | char *system_name; |
192 | int system_name_length; | |
46cec291 | 193 | int s, i; |
23a7488d | 194 | FILE *out, *in; |
46cec291 RS |
195 | struct sockaddr_un server; |
196 | char *homedir, *cwd, *str; | |
197 | char string[BUFSIZ]; | |
8f9aaa0a RS |
198 | |
199 | progname = argv[0]; | |
46cec291 | 200 | |
8f9aaa0a | 201 | /* Process options. */ |
5212210c | 202 | decode_options (argc, argv); |
46cec291 | 203 | |
5212210c | 204 | if (argc - optind < 1) |
8f9aaa0a | 205 | print_help_and_exit (); |
46cec291 RS |
206 | |
207 | /* | |
208 | * Open up an AF_UNIX socket in this person's home directory | |
209 | */ | |
210 | ||
211 | if ((s = socket (AF_UNIX, SOCK_STREAM, 0)) < 0) | |
212 | { | |
213 | fprintf (stderr, "%s: ", argv[0]); | |
214 | perror ("socket"); | |
215 | exit (1); | |
216 | } | |
217 | server.sun_family = AF_UNIX; | |
c5fee545 | 218 | |
efb859b4 | 219 | { |
a2b3f2b5 RS |
220 | system_name_length = 32; |
221 | ||
222 | while (1) | |
223 | { | |
224 | system_name = (char *) xmalloc (system_name_length + 1); | |
225 | ||
226 | /* system_name must be null-terminated string. */ | |
227 | system_name[system_name_length] = '\0'; | |
228 | ||
229 | if (gethostname (system_name, system_name_length) == 0) | |
230 | break; | |
231 | ||
232 | free (system_name); | |
233 | system_name_length *= 2; | |
234 | } | |
c5fee545 KH |
235 | } |
236 | ||
237 | #ifndef SERVER_HOME_DIR | |
238 | { | |
239 | struct stat statbfr; | |
efb859b4 | 240 | |
efb859b4 JB |
241 | sprintf (server.sun_path, "/tmp/esrv%d-%s", geteuid (), system_name); |
242 | ||
243 | if (stat (server.sun_path, &statbfr) == -1) | |
244 | { | |
c0acc3e1 JB |
245 | if (errno == ENOENT) |
246 | fprintf (stderr, | |
18a2fa91 KH |
247 | "%s: can't find socket; have you started the server?\n", |
248 | argv[0]); | |
c0acc3e1 | 249 | else |
18a2fa91 KH |
250 | fprintf (stderr, "%s: can't stat %s: %s\n", |
251 | argv[0], server.sun_path, strerror (errno)); | |
efb859b4 JB |
252 | exit (1); |
253 | } | |
b135a7cf | 254 | if (statbfr.st_uid != geteuid ()) |
efb859b4 | 255 | { |
18a2fa91 | 256 | fprintf (stderr, "%s: Invalid socket owner\n", argv[0]); |
efb859b4 JB |
257 | exit (1); |
258 | } | |
259 | } | |
46cec291 RS |
260 | #else |
261 | if ((homedir = getenv ("HOME")) == NULL) | |
262 | { | |
263 | fprintf (stderr, "%s: No home directory\n", argv[0]); | |
264 | exit (1); | |
265 | } | |
266 | strcpy (server.sun_path, homedir); | |
b135a7cf | 267 | strcat (server.sun_path, "/.emacs-server-"); |
b135a7cf | 268 | strcat (server.sun_path, system_name); |
46cec291 RS |
269 | #endif |
270 | ||
4e23f2ba JB |
271 | if (connect (s, (struct sockaddr *) &server, strlen (server.sun_path) + 2) |
272 | < 0) | |
46cec291 RS |
273 | { |
274 | fprintf (stderr, "%s: ", argv[0]); | |
275 | perror ("connect"); | |
276 | exit (1); | |
277 | } | |
23a7488d RS |
278 | |
279 | /* We use the stream OUT to send our command to the server. */ | |
46cec291 RS |
280 | if ((out = fdopen (s, "r+")) == NULL) |
281 | { | |
282 | fprintf (stderr, "%s: ", argv[0]); | |
283 | perror ("fdopen"); | |
284 | exit (1); | |
285 | } | |
286 | ||
23a7488d RS |
287 | /* We use the stream IN to read the response. |
288 | We used to use just one stream for both output and input | |
289 | on the socket, but reversing direction works nonportably: | |
290 | on some systems, the output appears as the first input; | |
291 | on other systems it does not. */ | |
292 | if ((in = fdopen (s, "r+")) == NULL) | |
293 | { | |
294 | fprintf (stderr, "%s: ", argv[0]); | |
295 | perror ("fdopen"); | |
296 | exit (1); | |
297 | } | |
298 | ||
e397a017 | 299 | #ifdef BSD_SYSTEM |
46cec291 | 300 | cwd = getwd (string); |
ee6a193c RS |
301 | #else |
302 | cwd = getcwd (string, sizeof string); | |
303 | #endif | |
46cec291 RS |
304 | if (cwd == 0) |
305 | { | |
306 | /* getwd puts message in STRING if it fails. */ | |
bd252662 RS |
307 | fprintf (stderr, "%s: %s (%s)\n", argv[0], |
308 | #ifdef BSD_SYSTEM | |
309 | string, | |
310 | #else | |
311 | "Cannot get current working directory", | |
312 | #endif | |
313 | strerror (errno)); | |
46cec291 RS |
314 | exit (1); |
315 | } | |
316 | ||
5212210c RS |
317 | if (nowait) |
318 | fprintf (out, "-nowait "); | |
292d74a3 | 319 | |
5212210c RS |
320 | for (i = optind; i < argc; i++) |
321 | { | |
46cec291 RS |
322 | if (*argv[i] == '+') |
323 | { | |
324 | char *p = argv[i] + 1; | |
325 | while (*p >= '0' && *p <= '9') p++; | |
326 | if (*p != 0) | |
0343a017 | 327 | fprintf (out, "%s/", quote_file_name (cwd)); |
46cec291 RS |
328 | } |
329 | else if (*argv[i] != '/') | |
0343a017 | 330 | fprintf (out, "%s/", quote_file_name (cwd)); |
5212210c RS |
331 | |
332 | fprintf (out, "%s ", quote_file_name (argv[i])); | |
46cec291 RS |
333 | } |
334 | fprintf (out, "\n"); | |
335 | fflush (out); | |
336 | ||
292d74a3 RS |
337 | /* Maybe wait for an answer. */ |
338 | if (nowait) | |
339 | return 0; | |
340 | ||
46cec291 RS |
341 | printf ("Waiting for Emacs..."); |
342 | fflush (stdout); | |
343 | ||
23a7488d RS |
344 | /* Now, wait for an answer and print any messages. On some systems, |
345 | the first line we read will actually be the output we just sent. | |
346 | We can't predict whether that will happen, so if it does, we | |
347 | detect it by recognizing `Client: ' at the beginning. */ | |
46cec291 | 348 | |
23a7488d | 349 | while (str = fgets (string, BUFSIZ, in)) |
46cec291 | 350 | printf ("%s", str); |
23a7488d | 351 | |
340ff9de | 352 | return 0; |
46cec291 RS |
353 | } |
354 | ||
355 | #else /* This is the SYSV IPC section */ | |
356 | ||
357 | #include <sys/types.h> | |
358 | #include <sys/ipc.h> | |
359 | #include <sys/msg.h> | |
b135a7cf | 360 | #include <sys/utsname.h> |
46cec291 | 361 | #include <stdio.h> |
bd252662 RS |
362 | #include <errno.h> |
363 | extern int errno; | |
46cec291 | 364 | |
1518a9eb | 365 | char *getwd (), *getcwd (), *getenv (); |
b135a7cf | 366 | struct utsname system_name; |
1518a9eb | 367 | |
46cec291 RS |
368 | main (argc, argv) |
369 | int argc; | |
370 | char **argv; | |
371 | { | |
372 | int s; | |
373 | key_t key; | |
1518a9eb RS |
374 | /* Size of text allocated in MSGP. */ |
375 | int size_allocated = BUFSIZ; | |
376 | /* Amount of text used in MSGP. */ | |
377 | int used; | |
378 | struct msgbuf *msgp | |
379 | = (struct msgbuf *) malloc (sizeof (struct msgbuf) + size_allocated); | |
46cec291 RS |
380 | struct msqid_ds * msg_st; |
381 | char *homedir, buf[BUFSIZ]; | |
382 | char gwdirb[BUFSIZ]; | |
383 | char *cwd; | |
384 | char *temp; | |
8f9aaa0a RS |
385 | |
386 | progname = argv[0]; | |
387 | ||
388 | /* Process options. */ | |
5212210c | 389 | decode_options (argc, argv); |
46cec291 | 390 | |
5212210c | 391 | if (argc - optind < 1) |
8f9aaa0a | 392 | print_help_and_exit (); |
46cec291 RS |
393 | |
394 | /* | |
b135a7cf | 395 | * Create a message queue using ~/.emacs-server as the path for ftok |
46cec291 RS |
396 | */ |
397 | if ((homedir = getenv ("HOME")) == NULL) | |
398 | { | |
399 | fprintf (stderr, "%s: No home directory\n", argv[0]); | |
400 | exit (1); | |
401 | } | |
402 | strcpy (buf, homedir); | |
b135a7cf RS |
403 | #ifndef HAVE_LONG_FILE_NAMES |
404 | /* If file names are short, we can't fit the host name. */ | |
405 | strcat (buf, "/.emacs-server"); | |
406 | #else | |
407 | strcat (buf, "/.emacs-server-"); | |
408 | uname (&system_name); | |
409 | strcat (buf, system_name.nodename); | |
410 | #endif | |
46cec291 RS |
411 | creat (buf, 0600); |
412 | key = ftok (buf, 1); /* unlikely to be anyone else using it */ | |
61a93162 | 413 | s = msgget (key, 0600 | IPC_CREAT); |
46cec291 RS |
414 | if (s == -1) |
415 | { | |
416 | fprintf (stderr, "%s: ", argv[0]); | |
417 | perror ("msgget"); | |
418 | exit (1); | |
419 | } | |
420 | ||
421 | /* Determine working dir, so we can prefix it to all the arguments. */ | |
e397a017 | 422 | #ifdef BSD_SYSTEM |
46cec291 RS |
423 | temp = getwd (gwdirb); |
424 | #else | |
425 | temp = getcwd (gwdirb, sizeof gwdirb); | |
426 | #endif | |
427 | ||
428 | cwd = gwdirb; | |
429 | if (temp != 0) | |
430 | { | |
431 | /* On some systems, cwd can look like `@machine/...'; | |
432 | ignore everything before the first slash in such a case. */ | |
433 | while (*cwd && *cwd != '/') | |
434 | cwd++; | |
435 | strcat (cwd, "/"); | |
436 | } | |
437 | else | |
438 | { | |
bd252662 | 439 | #ifdef BSD_SYSTEM |
26396b1b | 440 | fprintf (stderr, "%s: %s\n", argv[0], cwd); |
bd252662 RS |
441 | #else |
442 | fprintf (stderr, "%s: Cannot get current working directory: %s\n", | |
443 | argv[0], strerror (errno)); | |
444 | #endif | |
46cec291 RS |
445 | exit (1); |
446 | } | |
447 | ||
448 | msgp->mtext[0] = 0; | |
1518a9eb | 449 | used = 0; |
5212210c RS |
450 | |
451 | if (nowait) | |
452 | { | |
453 | strcat (msgp->mtext, "-nowait "); | |
454 | used += 8; | |
455 | } | |
456 | ||
457 | argc -= optind; | |
458 | argv += optind; | |
459 | ||
46cec291 RS |
460 | while (argc) |
461 | { | |
1518a9eb | 462 | int need_cwd = 0; |
cd33a5a0 | 463 | char *modified_arg = argv[0]; |
292d74a3 | 464 | |
5212210c | 465 | if (*modified_arg == '+') |
46cec291 | 466 | { |
cd33a5a0 | 467 | char *p = modified_arg + 1; |
46cec291 RS |
468 | while (*p >= '0' && *p <= '9') p++; |
469 | if (*p != 0) | |
1518a9eb | 470 | need_cwd = 1; |
46cec291 | 471 | } |
cd33a5a0 | 472 | else if (*modified_arg != '/') |
1518a9eb RS |
473 | need_cwd = 1; |
474 | ||
5212210c RS |
475 | modified_arg = quote_file_name (modified_arg); |
476 | ||
1518a9eb | 477 | if (need_cwd) |
0343a017 KH |
478 | /* Overestimate in case we have to quote something in CWD. */ |
479 | used += 2 * strlen (cwd); | |
cd33a5a0 | 480 | used += strlen (modified_arg) + 1; |
1518a9eb RS |
481 | while (used + 2 > size_allocated) |
482 | { | |
483 | size_allocated *= 2; | |
484 | msgp = (struct msgbuf *) realloc (msgp, | |
485 | (sizeof (struct msgbuf) | |
486 | + size_allocated)); | |
487 | } | |
488 | ||
489 | if (need_cwd) | |
0343a017 | 490 | strcat (msgp->mtext, quote_file_name (cwd)); |
46cec291 | 491 | |
cd33a5a0 | 492 | strcat (msgp->mtext, modified_arg); |
46cec291 RS |
493 | strcat (msgp->mtext, " "); |
494 | argv++; argc--; | |
495 | } | |
496 | strcat (msgp->mtext, "\n"); | |
1518a9eb RS |
497 | #ifdef HPUX /* HPUX has a bug. */ |
498 | if (strlen (msgp->mtext) >= 512) | |
499 | { | |
18a2fa91 | 500 | fprintf (stderr, "%s: args too long for msgsnd\n", progname); |
1518a9eb RS |
501 | exit (1); |
502 | } | |
503 | #endif | |
46cec291 RS |
504 | msgp->mtype = 1; |
505 | if (msgsnd (s, msgp, strlen (msgp->mtext)+1, 0) < 0) | |
506 | { | |
defb80d7 | 507 | fprintf (stderr, "%s: ", progname); |
46cec291 RS |
508 | perror ("msgsnd"); |
509 | exit (1); | |
510 | } | |
292d74a3 RS |
511 | |
512 | /* Maybe wait for an answer. */ | |
513 | if (nowait) | |
514 | return 0; | |
515 | ||
46cec291 RS |
516 | printf ("Waiting for Emacs..."); |
517 | fflush (stdout); | |
518 | ||
519 | msgrcv (s, msgp, BUFSIZ, getpid (), 0); /* wait for anything back */ | |
520 | strcpy (buf, msgp->mtext); | |
521 | ||
dc3c30fe KH |
522 | printf ("\n"); |
523 | if (*buf) | |
524 | printf ("%s\n", buf); | |
46cec291 RS |
525 | exit (0); |
526 | } | |
527 | ||
528 | #endif /* HAVE_SYSVIPC */ | |
529 | ||
530 | #endif /* HAVE_SOCKETS or HAVE_SYSVIPC */ | |
27711600 RM |
531 | \f |
532 | #ifndef HAVE_STRERROR | |
533 | char * | |
534 | strerror (errnum) | |
535 | int errnum; | |
536 | { | |
537 | extern char *sys_errlist[]; | |
538 | extern int sys_nerr; | |
539 | ||
540 | if (errnum >= 0 && errnum < sys_nerr) | |
541 | return sys_errlist[errnum]; | |
542 | return (char *) "Unknown error"; | |
543 | } | |
544 | ||
545 | #endif /* ! HAVE_STRERROR */ |