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