Commit | Line | Data |
---|---|---|
efb859b4 | 1 | /* Client process that communicates with GNU Emacs acting as server. |
92b47a4a | 2 | Copyright (C) 1986, 1987, 1994, 1999, 2000, 2001, 2002, 2003, 2004, |
273dc16a | 3 | 2005, 2006 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 | |
364c38d3 LK |
19 | the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, |
20 | Boston, MA 02110-1301, 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 | ||
aa0b6932 | 29 | #ifdef WINDOWSNT |
aa0b6932 | 30 | |
bc28de71 JB |
31 | /* config.h defines these, which disables sockets altogether! */ |
32 | # undef _WINSOCKAPI_ | |
33 | # undef _WINSOCK_H | |
34 | ||
411b80a5 JB |
35 | # include <malloc.h> |
36 | # include <stdlib.h> | |
42073bfb | 37 | # include <windows.h> |
411b80a5 | 38 | |
411b80a5 JB |
39 | # define NO_SOCKETS_IN_FILE_SYSTEM |
40 | ||
aa0b6932 JB |
41 | # define HSOCKET SOCKET |
42 | # define CLOSE_SOCKET closesocket | |
aa0b6932 | 43 | # define INITIALIZE() (initialize_sockets ()) |
411b80a5 JB |
44 | |
45 | #else /* !WINDOWSNT */ | |
46 | ||
ed4a3730 JB |
47 | # include <sys/types.h> |
48 | ||
1e7823d0 JB |
49 | # ifdef HAVE_INET_SOCKETS |
50 | # include <netinet/in.h> | |
51 | # endif | |
411b80a5 | 52 | |
e35fc962 | 53 | # define INVALID_SOCKET -1 |
aa0b6932 JB |
54 | # define HSOCKET int |
55 | # define CLOSE_SOCKET close | |
aa0b6932 | 56 | # define INITIALIZE() |
411b80a5 JB |
57 | |
58 | #endif /* !WINDOWSNT */ | |
aa0b6932 | 59 | |
4e23f2ba | 60 | #undef signal |
46cec291 | 61 | |
42073bfb | 62 | #include <stdarg.h> |
e69233c2 | 63 | #include <ctype.h> |
8f9aaa0a | 64 | #include <stdio.h> |
aa0b6932 | 65 | #include "getopt.h" |
79f13bba DL |
66 | #ifdef HAVE_UNISTD_H |
67 | #include <unistd.h> | |
68 | #endif | |
8f9aaa0a | 69 | |
9f637eea GM |
70 | #ifdef VMS |
71 | # include "vms-pwd.h" | |
aa0b6932 JB |
72 | #else /* not VMS */ |
73 | #ifdef WINDOWSNT | |
74 | # include <io.h> | |
75 | #else /* not WINDOWSNT */ | |
9f637eea | 76 | # include <pwd.h> |
aa0b6932 | 77 | #endif /* not WINDOWSNT */ |
9f637eea | 78 | #endif /* not VMS */ |
dc4a4a14 | 79 | #include <sys/stat.h> |
9f637eea | 80 | |
9628b887 | 81 | #include <signal.h> |
4d553a13 | 82 | #include <errno.h> |
9628b887 | 83 | |
6bcc8ec7 KL |
84 | /* From lisp.h */ |
85 | #ifndef DIRECTORY_SEP | |
86 | #define DIRECTORY_SEP '/' | |
87 | #endif | |
88 | #ifndef IS_DIRECTORY_SEP | |
89 | #define IS_DIRECTORY_SEP(_c_) ((_c_) == DIRECTORY_SEP) | |
90 | #endif | |
91 | #ifndef IS_DEVICE_SEP | |
92 | #ifndef DEVICE_SEP | |
93 | #define IS_DEVICE_SEP(_c_) 0 | |
94 | #else | |
95 | #define IS_DEVICE_SEP(_c_) ((_c_) == DEVICE_SEP) | |
96 | #endif | |
97 | #endif | |
98 | #ifndef IS_ANY_SEP | |
99 | #define IS_ANY_SEP(_c_) (IS_DIRECTORY_SEP (_c_)) | |
100 | #endif | |
101 | ||
102 | ||
9628b887 | 103 | \f |
8f9aaa0a | 104 | char *getenv (), *getwd (); |
5b9562c3 | 105 | char *(getcwd) (); |
8f9aaa0a | 106 | |
8f9aaa0a RS |
107 | #ifndef VERSION |
108 | #define VERSION "unspecified" | |
109 | #endif | |
110 | \f | |
aa0b6932 | 111 | #define SEND_STRING(data) (send_to_emacs (s, (data))) |
974b73e8 | 112 | #define SEND_QUOTED(data) (quote_argument (s, (data))) |
aa0b6932 JB |
113 | |
114 | #ifndef EXIT_SUCCESS | |
115 | #define EXIT_SUCCESS 0 | |
116 | #endif | |
117 | ||
118 | #ifndef EXIT_FAILURE | |
119 | #define EXIT_FAILURE 1 | |
120 | #endif | |
121 | ||
122 | #ifndef FALSE | |
123 | #define FALSE 0 | |
124 | #endif | |
125 | ||
126 | #ifndef TRUE | |
127 | #define TRUE 1 | |
128 | #endif | |
129 | ||
130 | #ifndef NO_RETURN | |
131 | #define NO_RETURN | |
132 | #endif | |
133 | \f | |
8f9aaa0a RS |
134 | /* Name used to invoke this program. */ |
135 | char *progname; | |
136 | ||
0a125897 KL |
137 | /* The first argument to main. */ |
138 | int main_argc; | |
139 | ||
140 | /* The second argument to main. */ | |
141 | char **main_argv; | |
142 | ||
749ae770 | 143 | /* Nonzero means don't wait for a response from Emacs. --no-wait. */ |
8f9aaa0a RS |
144 | int nowait = 0; |
145 | ||
30be2360 SM |
146 | /* Nonzero means args are expressions to be evaluated. --eval. */ |
147 | int eval = 0; | |
148 | ||
92071250 KL |
149 | /* Nonzero means don't open a new frame. --current-frame. */ |
150 | int current_frame = 0; | |
151 | ||
77134727 KL |
152 | /* Nonzero means open a new graphical frame. */ |
153 | int window_system = 0; | |
154 | ||
30be2360 SM |
155 | /* The display on which Emacs should work. --display. */ |
156 | char *display = NULL; | |
157 | ||
9628b887 | 158 | /* Nonzero means open a new Emacs frame on the current terminal. */ |
77134727 | 159 | int tty = 0; |
9628b887 | 160 | |
30be2360 SM |
161 | /* If non-NULL, the name of an editor to fallback to if the server |
162 | is not running. --alternate-editor. */ | |
b03d27bd | 163 | const char *alternate_editor = NULL; |
30be2360 | 164 | |
3db926be | 165 | /* If non-NULL, the filename of the UNIX socket. */ |
254107e4 RS |
166 | char *socket_name = NULL; |
167 | ||
aa0b6932 JB |
168 | /* If non-NULL, the filename of the authentication file. */ |
169 | char *server_file = NULL; | |
170 | ||
c66648e0 JB |
171 | /* PID of the Emacs server process. */ |
172 | int emacs_pid = 0; | |
173 | ||
974b73e8 KL |
174 | /* File handles for communicating with Emacs. */ |
175 | FILE *out, *in; | |
176 | ||
2381d38d | 177 | void print_help_and_exit () NO_RETURN; |
7f3bff3e | 178 | |
8f9aaa0a RS |
179 | struct option longopts[] = |
180 | { | |
749ae770 | 181 | { "no-wait", no_argument, NULL, 'n' }, |
30be2360 | 182 | { "eval", no_argument, NULL, 'e' }, |
8f9aaa0a RS |
183 | { "help", no_argument, NULL, 'H' }, |
184 | { "version", no_argument, NULL, 'V' }, | |
b28c910d | 185 | { "tty", no_argument, NULL, 't' }, |
e5299d8d | 186 | { "current-frame", no_argument, NULL, 'c' }, |
3cf8c6aa | 187 | { "alternate-editor", required_argument, NULL, 'a' }, |
b03d27bd | 188 | #ifndef NO_SOCKETS_IN_FILE_SYSTEM |
254107e4 | 189 | { "socket-name", required_argument, NULL, 's' }, |
b03d27bd | 190 | #endif |
aa0b6932 | 191 | { "server-file", required_argument, NULL, 'f' }, |
30be2360 SM |
192 | { "display", required_argument, NULL, 'd' }, |
193 | { 0, 0, 0, 0 } | |
8f9aaa0a RS |
194 | }; |
195 | ||
974b73e8 KL |
196 | \f |
197 | /* Like malloc but get fatal error if memory is exhausted. */ | |
198 | ||
199 | long * | |
200 | xmalloc (size) | |
201 | unsigned int size; | |
202 | { | |
203 | long *result = (long *) malloc (size); | |
204 | if (result == NULL) | |
205 | { | |
206 | perror ("malloc"); | |
207 | exit (EXIT_FAILURE); | |
208 | } | |
209 | return result; | |
210 | } | |
211 | ||
212 | /* Like strdup but get a fatal error if memory is exhausted. */ | |
213 | ||
214 | char * | |
215 | xstrdup (const char *s) | |
216 | { | |
217 | char *result = strdup (s); | |
218 | if (result == NULL) | |
219 | { | |
220 | perror ("strdup"); | |
221 | exit (EXIT_FAILURE); | |
222 | } | |
223 | return result; | |
224 | } | |
225 | ||
226 | /* From sysdep.c */ | |
227 | #if !defined (HAVE_GET_CURRENT_DIR_NAME) || defined (BROKEN_GET_CURRENT_DIR_NAME) | |
228 | ||
229 | /* Return the current working directory. Returns NULL on errors. | |
230 | Any other returned value must be freed with free. This is used | |
231 | only when get_current_dir_name is not defined on the system. */ | |
232 | char* | |
233 | get_current_dir_name () | |
234 | { | |
235 | char *buf; | |
236 | char *pwd; | |
237 | struct stat dotstat, pwdstat; | |
238 | /* If PWD is accurate, use it instead of calling getwd. PWD is | |
239 | sometimes a nicer name, and using it may avoid a fatal error if a | |
240 | parent directory is searchable but not readable. */ | |
241 | if ((pwd = getenv ("PWD")) != 0 | |
242 | && (IS_DIRECTORY_SEP (*pwd) || (*pwd && IS_DEVICE_SEP (pwd[1]))) | |
243 | && stat (pwd, &pwdstat) == 0 | |
244 | && stat (".", &dotstat) == 0 | |
245 | && dotstat.st_ino == pwdstat.st_ino | |
246 | && dotstat.st_dev == pwdstat.st_dev | |
247 | #ifdef MAXPATHLEN | |
248 | && strlen (pwd) < MAXPATHLEN | |
249 | #endif | |
250 | ) | |
251 | { | |
252 | buf = (char *) xmalloc (strlen (pwd) + 1); | |
253 | if (!buf) | |
254 | return NULL; | |
255 | strcpy (buf, pwd); | |
256 | } | |
257 | #ifdef HAVE_GETCWD | |
258 | else | |
259 | { | |
260 | size_t buf_size = 1024; | |
261 | buf = (char *) xmalloc (buf_size); | |
262 | if (!buf) | |
263 | return NULL; | |
264 | for (;;) | |
265 | { | |
266 | if (getcwd (buf, buf_size) == buf) | |
267 | break; | |
268 | if (errno != ERANGE) | |
269 | { | |
270 | int tmp_errno = errno; | |
271 | free (buf); | |
272 | errno = tmp_errno; | |
273 | return NULL; | |
274 | } | |
275 | buf_size *= 2; | |
276 | buf = (char *) realloc (buf, buf_size); | |
277 | if (!buf) | |
278 | return NULL; | |
279 | } | |
280 | } | |
281 | #else | |
282 | else | |
283 | { | |
284 | /* We need MAXPATHLEN here. */ | |
285 | buf = (char *) xmalloc (MAXPATHLEN + 1); | |
286 | if (!buf) | |
287 | return NULL; | |
288 | if (getwd (buf) == NULL) | |
289 | { | |
290 | int tmp_errno = errno; | |
291 | free (buf); | |
292 | errno = tmp_errno; | |
293 | return NULL; | |
294 | } | |
295 | } | |
296 | #endif | |
297 | return buf; | |
298 | } | |
299 | #endif | |
300 | ||
42073bfb JB |
301 | /* Message functions. */ |
302 | ||
303 | #ifdef WINDOWSNT | |
42073bfb | 304 | int |
f0384499 | 305 | w32_window_app () |
42073bfb JB |
306 | { |
307 | static int window_app = -1; | |
308 | char szTitle[MAX_PATH]; | |
309 | ||
310 | if (window_app < 0) | |
0d3d6719 JB |
311 | /* Checking for STDOUT does not work; it's a valid handle also in |
312 | nonconsole apps. Testing for the console title seems to work. */ | |
42073bfb JB |
313 | window_app = (GetConsoleTitleA (szTitle, MAX_PATH) == 0); |
314 | ||
315 | return window_app; | |
316 | } | |
317 | #endif | |
318 | ||
319 | void | |
320 | message (int is_error, char *message, ...) | |
321 | { | |
c66648e0 | 322 | char msg [2048]; |
42073bfb JB |
323 | va_list args; |
324 | ||
325 | va_start (args, message); | |
42073bfb JB |
326 | vsprintf (msg, message, args); |
327 | va_end (args); | |
328 | ||
329 | #ifdef WINDOWSNT | |
330 | if (w32_window_app ()) | |
331 | { | |
332 | if (is_error) | |
333 | MessageBox (NULL, msg, "Emacsclient ERROR", MB_ICONERROR); | |
334 | else | |
335 | MessageBox (NULL, msg, "Emacsclient", MB_ICONINFORMATION); | |
336 | } | |
337 | else | |
338 | #endif | |
9219db75 JB |
339 | { |
340 | FILE *f = is_error ? stderr : stdout; | |
341 | ||
342 | fputs (msg, f); | |
343 | fflush (f); | |
344 | } | |
42073bfb JB |
345 | } |
346 | ||
8f9aaa0a | 347 | /* Decode the options from argv and argc. |
5212210c | 348 | The global variable `optind' will say how many arguments we used up. */ |
8f9aaa0a | 349 | |
5212210c | 350 | void |
8f9aaa0a RS |
351 | decode_options (argc, argv) |
352 | int argc; | |
353 | char **argv; | |
354 | { | |
b6b6d6d2 | 355 | alternate_editor = getenv ("ALTERNATE_EDITOR"); |
77134727 | 356 | display = getenv ("DISPLAY"); |
8689463a | 357 | if (display && strlen (display) == 0) |
e5299d8d | 358 | display = NULL; |
0b0d3e0b | 359 | |
8f9aaa0a RS |
360 | while (1) |
361 | { | |
362 | int opt = getopt_long (argc, argv, | |
b03d27bd | 363 | #ifndef NO_SOCKETS_IN_FILE_SYSTEM |
974b73e8 | 364 | "VHnea:s:f:d:tc", |
b03d27bd | 365 | #else |
974b73e8 | 366 | "VHnea:f:d:tc", |
b03d27bd | 367 | #endif |
974b73e8 | 368 | longopts, 0); |
8f9aaa0a RS |
369 | |
370 | if (opt == EOF) | |
371 | break; | |
372 | ||
373 | switch (opt) | |
374 | { | |
375 | case 0: | |
376 | /* If getopt returns 0, then it has already processed a | |
377 | long-named option. We should do nothing. */ | |
378 | break; | |
e69233c2 | 379 | |
97e3214d GM |
380 | case 'a': |
381 | alternate_editor = optarg; | |
382 | break; | |
e69233c2 | 383 | |
b03d27bd | 384 | #ifndef NO_SOCKETS_IN_FILE_SYSTEM |
254107e4 RS |
385 | case 's': |
386 | socket_name = optarg; | |
387 | break; | |
b03d27bd | 388 | #endif |
254107e4 | 389 | |
aa0b6932 JB |
390 | case 'f': |
391 | server_file = optarg; | |
392 | break; | |
254107e4 | 393 | |
30be2360 SM |
394 | case 'd': |
395 | display = optarg; | |
396 | break; | |
397 | ||
8f9aaa0a RS |
398 | case 'n': |
399 | nowait = 1; | |
400 | break; | |
401 | ||
30be2360 SM |
402 | case 'e': |
403 | eval = 1; | |
404 | break; | |
405 | ||
8f9aaa0a | 406 | case 'V': |
42073bfb | 407 | message (FALSE, "emacsclient %s\n", VERSION); |
65396510 | 408 | exit (EXIT_SUCCESS); |
8f9aaa0a | 409 | break; |
46cec291 | 410 | |
819b8f00 | 411 | case 't': |
77134727 | 412 | tty = 1; |
77134727 KL |
413 | break; |
414 | ||
e5299d8d | 415 | case 'c': |
92071250 | 416 | current_frame = 1; |
9628b887 | 417 | break; |
0b0d3e0b | 418 | |
8f9aaa0a | 419 | case 'H': |
8f9aaa0a | 420 | print_help_and_exit (); |
20c396e8 JB |
421 | break; |
422 | ||
423 | default: | |
42073bfb | 424 | message (TRUE, "Try `%s --help' for more information\n", progname); |
65396510 | 425 | exit (EXIT_FAILURE); |
20c396e8 | 426 | break; |
8f9aaa0a RS |
427 | } |
428 | } | |
9628b887 | 429 | |
92071250 KL |
430 | if (!tty && display) |
431 | window_system = 1; | |
432 | else | |
433 | tty = 1; | |
434 | ||
b8ccaf6f KL |
435 | /* --no-wait implies --current-frame on ttys when there are file |
436 | arguments or expressions given. */ | |
437 | if (nowait && tty && argc - optind > 0) | |
92071250 KL |
438 | current_frame = 1; |
439 | ||
440 | if (current_frame) | |
441 | { | |
442 | tty = 0; | |
443 | window_system = 0; | |
444 | } | |
445 | ||
446 | if (tty) | |
447 | window_system = 0; | |
8f9aaa0a RS |
448 | } |
449 | ||
974b73e8 | 450 | \f |
7f3bff3e | 451 | void |
8f9aaa0a RS |
452 | print_help_and_exit () |
453 | { | |
42073bfb | 454 | message (FALSE, |
974b73e8 | 455 | "Usage: %s [OPTIONS] FILE...\n\ |
30be2360 SM |
456 | Tell the Emacs server to visit the specified files.\n\ |
457 | Every FILE can be either just a FILENAME or [+LINE[:COLUMN]] FILENAME.\n\ | |
20c396e8 | 458 | \n\ |
30be2360 | 459 | The following OPTIONS are accepted:\n\ |
974b73e8 | 460 | -V, --version Just print version info and return\n\ |
30be2360 | 461 | -H, --help Print this usage information message\n\ |
819b8f00 | 462 | -t, --tty Open a new Emacs frame on the current terminal\n\ |
e5299d8d | 463 | -c, --current-frame Do not create a new frame; use the current Emacs frame\n\ |
30be2360 | 464 | -e, --eval Evaluate the FILE arguments as ELisp expressions\n\ |
974b73e8 KL |
465 | -n, --no-wait Don't wait for the server to return\n\ |
466 | -d, --display=DISPLAY Visit the file in the given display\n" | |
aa0b6932 JB |
467 | #ifndef NO_SOCKETS_IN_FILE_SYSTEM |
468 | "-s, --socket-name=FILENAME\n\ | |
974b73e8 | 469 | Set filename of the UNIX socket for communication\n" |
aa0b6932 JB |
470 | #endif |
471 | "-f, --server-file=FILENAME\n\ | |
974b73e8 | 472 | Set filename of the TCP authentication file\n\ |
30be2360 SM |
473 | -a, --alternate-editor=EDITOR\n\ |
474 | Editor to fallback to if the server is not running\n\ | |
20c396e8 | 475 | \n\ |
30be2360 | 476 | Report bugs to bug-gnu-emacs@gnu.org.\n", progname); |
65396510 | 477 | exit (EXIT_SUCCESS); |
8f9aaa0a | 478 | } |
5212210c | 479 | |
aa0b6932 JB |
480 | /* |
481 | Try to run a different command, or --if no alternate editor is | |
482 | defined-- exit with an errorcode. | |
483 | */ | |
484 | void | |
974b73e8 | 485 | fail (void) |
9002956f | 486 | { |
aa0b6932 | 487 | if (alternate_editor) |
9002956f | 488 | { |
aa0b6932 | 489 | int i = optind - 1; |
4472aef4 | 490 | |
974b73e8 | 491 | execvp (alternate_editor, main_argv + i); |
42073bfb | 492 | message (TRUE, "%s: error executing alternate editor \"%s\"\n", |
974b73e8 | 493 | progname, alternate_editor); |
9002956f | 494 | } |
aa0b6932 | 495 | exit (EXIT_FAILURE); |
9002956f KL |
496 | } |
497 | ||
aa0b6932 | 498 | \f |
1e7823d0 | 499 | #if !defined (HAVE_SOCKETS) || !defined (HAVE_INET_SOCKETS) |
9002956f | 500 | |
aa0b6932 JB |
501 | int |
502 | main (argc, argv) | |
503 | int argc; | |
504 | char **argv; | |
9002956f | 505 | { |
974b73e8 KL |
506 | main_argc = argc; |
507 | main_argv = argv; | |
508 | progname = argv[0]; | |
509 | message (TRUE, "%s: Sorry, the Emacs server is supported only\n" | |
510 | "on systems with Berkeley sockets.\n", | |
aa0b6932 | 511 | argv[0]); |
974b73e8 | 512 | fail (); |
9002956f KL |
513 | } |
514 | ||
1e7823d0 | 515 | #else /* HAVE_SOCKETS && HAVE_INET_SOCKETS */ |
2828d5f9 | 516 | |
aa0b6932 JB |
517 | #ifdef WINDOWSNT |
518 | # include <winsock2.h> | |
2828d5f9 | 519 | #else |
aa0b6932 JB |
520 | # include <sys/types.h> |
521 | # include <sys/socket.h> | |
522 | # include <sys/un.h> | |
523 | # include <sys/stat.h> | |
524 | # include <errno.h> | |
525 | #endif | |
526 | ||
527 | #define AUTH_KEY_LENGTH 64 | |
528 | #define SEND_BUFFER_SIZE 4096 | |
529 | ||
530 | extern char *strerror (); | |
531 | extern int errno; | |
532 | ||
533 | /* Buffer to accumulate data to send in TCP connections. */ | |
534 | char send_buffer[SEND_BUFFER_SIZE + 1]; | |
535 | int sblen = 0; /* Fill pointer for the send buffer. */ | |
536 | ||
537 | /* Let's send the data to Emacs when either | |
538 | - the data ends in "\n", or | |
539 | - the buffer is full (but this shouldn't happen) | |
540 | Otherwise, we just accumulate it. */ | |
b03d27bd JB |
541 | void |
542 | send_to_emacs (s, data) | |
aa0b6932 JB |
543 | HSOCKET s; |
544 | char *data; | |
545 | { | |
546 | while (data) | |
2828d5f9 | 547 | { |
aa0b6932 JB |
548 | int dlen = strlen (data); |
549 | if (dlen + sblen >= SEND_BUFFER_SIZE) | |
550 | { | |
551 | int part = SEND_BUFFER_SIZE - sblen; | |
552 | strncpy (&send_buffer[sblen], data, part); | |
553 | data += part; | |
554 | sblen = SEND_BUFFER_SIZE; | |
555 | } | |
556 | else if (dlen) | |
557 | { | |
558 | strcpy (&send_buffer[sblen], data); | |
559 | data = NULL; | |
560 | sblen += dlen; | |
561 | } | |
562 | else | |
563 | break; | |
564 | ||
565 | if (sblen == SEND_BUFFER_SIZE | |
566 | || (sblen > 0 && send_buffer[sblen-1] == '\n')) | |
567 | { | |
568 | int sent = send (s, send_buffer, sblen, 0); | |
569 | if (sent != sblen) | |
570 | strcpy (send_buffer, &send_buffer[sent]); | |
571 | sblen -= sent; | |
572 | } | |
2828d5f9 | 573 | } |
2828d5f9 | 574 | } |
2828d5f9 KL |
575 | |
576 | \f | |
0b0d3e0b | 577 | /* In STR, insert a & before each &, each space, each newline, and |
a4cf2096 | 578 | any initial -. Change spaces to underscores, too, so that the |
0b0d3e0b KL |
579 | return value never contains a space. |
580 | ||
581 | Does not change the string. Outputs the result to STREAM. */ | |
87209357 | 582 | void |
974b73e8 | 583 | quote_argument (s, str) |
aa0b6932 | 584 | HSOCKET s; |
0b0d3e0b | 585 | char *str; |
5212210c | 586 | { |
9002956f | 587 | char *copy = (char *) xmalloc (strlen (str) * 2 + 1); |
5212210c RS |
588 | char *p, *q; |
589 | ||
0b0d3e0b | 590 | p = str; |
5212210c RS |
591 | q = copy; |
592 | while (*p) | |
593 | { | |
594 | if (*p == ' ') | |
595 | { | |
f1db6a73 | 596 | *q++ = '&'; |
5212210c RS |
597 | *q++ = '_'; |
598 | p++; | |
599 | } | |
3cf8c6aa SM |
600 | else if (*p == '\n') |
601 | { | |
602 | *q++ = '&'; | |
603 | *q++ = 'n'; | |
604 | p++; | |
605 | } | |
5212210c RS |
606 | else |
607 | { | |
0b0d3e0b | 608 | if (*p == '&' || (*p == '-' && p == str)) |
f1db6a73 | 609 | *q++ = '&'; |
5212210c RS |
610 | *q++ = *p++; |
611 | } | |
612 | } | |
f1db6a73 | 613 | *q++ = 0; |
5212210c | 614 | |
aa0b6932 | 615 | SEND_STRING (copy); |
87209357 EZ |
616 | |
617 | free (copy); | |
5212210c | 618 | } |
0c76956f | 619 | |
0b0d3e0b KL |
620 | |
621 | /* The inverse of quote_argument. Removes quoting in string STR by | |
622 | modifying the string in place. Returns STR. */ | |
623 | ||
624 | char * | |
625 | unquote_argument (str) | |
626 | char *str; | |
627 | { | |
628 | char *p, *q; | |
629 | ||
630 | if (! str) | |
631 | return str; | |
632 | ||
633 | p = str; | |
634 | q = str; | |
635 | while (*p) | |
636 | { | |
637 | if (*p == '&') | |
638 | { | |
639 | p++; | |
640 | if (*p == '&') | |
641 | *p = '&'; | |
642 | else if (*p == '_') | |
643 | *p = ' '; | |
644 | else if (*p == 'n') | |
645 | *p = '\n'; | |
646 | else if (*p == '-') | |
647 | *p = '-'; | |
648 | } | |
649 | *q++ = *p++; | |
650 | } | |
651 | *q = 0; | |
652 | return str; | |
653 | } | |
654 | ||
8f9aaa0a | 655 | \f |
b03d27bd JB |
656 | int |
657 | file_name_absolute_p (filename) | |
658 | const unsigned char *filename; | |
659 | { | |
660 | /* Sanity check, it shouldn't happen. */ | |
661 | if (! filename) return FALSE; | |
662 | ||
663 | /* /xxx is always an absolute path. */ | |
664 | if (filename[0] == '/') return TRUE; | |
665 | ||
666 | /* Empty filenames (which shouldn't happen) are relative. */ | |
667 | if (filename[0] == '\0') return FALSE; | |
668 | ||
669 | #ifdef WINDOWSNT | |
670 | /* X:\xxx is always absolute; X:xxx is an error and will fail. */ | |
5f7a4874 | 671 | if (isalpha (filename[0]) |
cb0297bb | 672 | && filename[1] == ':' && (filename[2] == '\\' || filename[2] == '/')) |
b03d27bd JB |
673 | return TRUE; |
674 | ||
675 | /* Both \xxx and \\xxx\yyy are absolute. */ | |
676 | if (filename[0] == '\\') return TRUE; | |
677 | #endif | |
678 | ||
679 | return FALSE; | |
680 | } | |
681 | ||
aa0b6932 | 682 | #ifdef WINDOWSNT |
f0384499 | 683 | /* Wrapper to make WSACleanup a cdecl, as required by atexit. */ |
b03d27bd JB |
684 | void |
685 | __cdecl close_winsock () | |
aa0b6932 JB |
686 | { |
687 | WSACleanup (); | |
688 | } | |
0c76956f | 689 | |
b03d27bd JB |
690 | /* Initialize the WinSock2 library. */ |
691 | void | |
692 | initialize_sockets () | |
0c76956f | 693 | { |
aa0b6932 JB |
694 | WSADATA wsaData; |
695 | ||
aa0b6932 JB |
696 | if (WSAStartup (MAKEWORD (2, 0), &wsaData)) |
697 | { | |
42073bfb | 698 | message (TRUE, "%s: error initializing WinSock2", progname); |
aa0b6932 JB |
699 | exit (EXIT_FAILURE); |
700 | } | |
701 | ||
702 | atexit (close_winsock); | |
0c76956f | 703 | } |
e35fc962 | 704 | #endif /* WINDOWSNT */ |
974b73e8 | 705 | |
8f9aaa0a | 706 | \f |
65e86587 KL |
707 | #ifdef WINDOWSNT |
708 | ||
709 | /* | |
710 | execvp wrapper for Windows. Quotes arguments with embedded spaces. | |
711 | ||
712 | This is necessary due to the broken implementation of exec* routines in | |
713 | the Microsoft libraries: they concatenate the arguments together without | |
714 | quoting special characters, and pass the result to CreateProcess, with | |
715 | predictably bad results. By contrast, Posix execvp passes the arguments | |
716 | directly into the argv array of the child process. | |
717 | */ | |
718 | int | |
719 | w32_execvp (path, argv) | |
720 | char *path; | |
721 | char **argv; | |
722 | { | |
723 | int i; | |
724 | ||
725 | /* Required to allow a .BAT script as alternate editor. */ | |
726 | argv[0] = (char *) alternate_editor; | |
727 | ||
728 | for (i = 0; argv[i]; i++) | |
729 | if (strchr (argv[i], ' ')) | |
730 | { | |
731 | char *quoted = alloca (strlen (argv[i]) + 3); | |
732 | sprintf (quoted, "\"%s\"", argv[i]); | |
733 | argv[i] = quoted; | |
734 | } | |
735 | ||
736 | return execvp (path, argv); | |
737 | } | |
738 | ||
739 | #undef execvp | |
740 | #define execvp w32_execvp | |
741 | ||
742 | #endif /* WINDOWSNT */ | |
743 | ||
97e3214d | 744 | /* |
aa0b6932 | 745 | * Read the information needed to set up a TCP comm channel with |
434a6c5d | 746 | * the Emacs server: host, port, pid and authentication string. |
0e0dced5 | 747 | */ |
b03d27bd JB |
748 | int |
749 | get_server_config (server, authentication) | |
aa0b6932 JB |
750 | struct sockaddr_in *server; |
751 | char *authentication; | |
97e3214d | 752 | { |
aa0b6932 JB |
753 | char dotted[32]; |
754 | char *port; | |
434a6c5d | 755 | char *pid; |
b03d27bd | 756 | FILE *config = NULL; |
aa0b6932 | 757 | |
b03d27bd JB |
758 | if (file_name_absolute_p (server_file)) |
759 | config = fopen (server_file, "rb"); | |
760 | else | |
97e3214d | 761 | { |
aa0b6932 | 762 | char *home = getenv ("HOME"); |
88b46d84 | 763 | |
aa0b6932 JB |
764 | if (home) |
765 | { | |
766 | char *path = alloca (32 + strlen (home) + strlen (server_file)); | |
767 | sprintf (path, "%s/.emacs.d/server/%s", home, server_file); | |
768 | config = fopen (path, "rb"); | |
769 | } | |
88b46d84 JB |
770 | #ifdef WINDOWSNT |
771 | if (!config && (home = getenv ("APPDATA"))) | |
772 | { | |
773 | char *path = alloca (32 + strlen (home) + strlen (server_file)); | |
774 | sprintf (path, "%s/.emacs.d/server/%s", home, server_file); | |
775 | config = fopen (path, "rb"); | |
776 | } | |
777 | #endif | |
aa0b6932 JB |
778 | } |
779 | ||
780 | if (! config) | |
781 | return FALSE; | |
782 | ||
783 | if (fgets (dotted, sizeof dotted, config) | |
434a6c5d JB |
784 | && (port = strchr (dotted, ':')) |
785 | && (pid = strchr (port, ' '))) | |
aa0b6932 JB |
786 | { |
787 | *port++ = '\0'; | |
434a6c5d | 788 | *pid++ = '\0'; |
97e3214d GM |
789 | } |
790 | else | |
791 | { | |
42073bfb | 792 | message (TRUE, "%s: invalid configuration info", progname); |
65396510 | 793 | exit (EXIT_FAILURE); |
97e3214d | 794 | } |
97e3214d | 795 | |
aa0b6932 JB |
796 | server->sin_family = AF_INET; |
797 | server->sin_addr.s_addr = inet_addr (dotted); | |
798 | server->sin_port = htons (atoi (port)); | |
97e3214d | 799 | |
aa0b6932 JB |
800 | if (! fread (authentication, AUTH_KEY_LENGTH, 1, config)) |
801 | { | |
42073bfb | 802 | message (TRUE, "%s: cannot read authentication info", progname); |
aa0b6932 JB |
803 | exit (EXIT_FAILURE); |
804 | } | |
46cec291 | 805 | |
aa0b6932 | 806 | fclose (config); |
97e3214d | 807 | |
c66648e0 | 808 | emacs_pid = atoi (pid); |
434a6c5d | 809 | |
aa0b6932 | 810 | return TRUE; |
97e3214d GM |
811 | } |
812 | ||
aa0b6932 JB |
813 | HSOCKET |
814 | set_tcp_socket () | |
815 | { | |
816 | HSOCKET s; | |
817 | struct sockaddr_in server; | |
aa0b6932 JB |
818 | struct linger l_arg = {1, 1}; |
819 | char auth_string[AUTH_KEY_LENGTH + 1]; | |
9628b887 | 820 | |
aa0b6932 JB |
821 | if (! get_server_config (&server, auth_string)) |
822 | return INVALID_SOCKET; | |
823 | ||
b03d27bd | 824 | if (server.sin_addr.s_addr != inet_addr ("127.0.0.1")) |
9219db75 | 825 | message (FALSE, "%s: connected to remote socket at %s\n", |
b03d27bd JB |
826 | progname, inet_ntoa (server.sin_addr)); |
827 | ||
aa0b6932 JB |
828 | /* |
829 | * Open up an AF_INET socket | |
830 | */ | |
831 | if ((s = socket (AF_INET, SOCK_STREAM, IPPROTO_TCP)) < 0) | |
832 | { | |
42073bfb | 833 | message (TRUE, "%s: socket: %s\n", progname, strerror (errno)); |
aa0b6932 JB |
834 | return INVALID_SOCKET; |
835 | } | |
836 | ||
837 | /* | |
838 | * Set up the socket | |
839 | */ | |
840 | if (connect (s, (struct sockaddr *) &server, sizeof server) < 0) | |
841 | { | |
42073bfb | 842 | message (TRUE, "%s: connect: %s\n", progname, strerror (errno)); |
aa0b6932 JB |
843 | return INVALID_SOCKET; |
844 | } | |
845 | ||
aa0b6932 JB |
846 | setsockopt (s, SOL_SOCKET, SO_LINGER, (char *) &l_arg, sizeof l_arg); |
847 | ||
848 | /* | |
849 | * Send the authentication | |
850 | */ | |
851 | auth_string[AUTH_KEY_LENGTH] = '\0'; | |
852 | ||
853 | SEND_STRING ("-auth "); | |
854 | SEND_STRING (auth_string); | |
855 | SEND_STRING ("\n"); | |
856 | ||
857 | return s; | |
858 | } | |
859 | ||
860 | #if !defined (NO_SOCKETS_IN_FILE_SYSTEM) | |
46cec291 | 861 | |
9f637eea GM |
862 | /* Three possibilities: |
863 | 2 - can't be `stat'ed (sets errno) | |
864 | 1 - isn't owned by us | |
865 | 0 - success: none of the above */ | |
866 | ||
867 | static int | |
868 | socket_status (socket_name) | |
869 | char *socket_name; | |
870 | { | |
871 | struct stat statbfr; | |
872 | ||
873 | if (stat (socket_name, &statbfr) == -1) | |
874 | return 2; | |
875 | ||
876 | if (statbfr.st_uid != geteuid ()) | |
877 | return 1; | |
0b0d3e0b | 878 | |
9f637eea GM |
879 | return 0; |
880 | } | |
881 | ||
974b73e8 | 882 | \f |
da8e1115 KL |
883 | /* A signal handler that passes the signal to the Emacs process. |
884 | Useful for SIGWINCH. */ | |
885 | ||
9628b887 | 886 | SIGTYPE |
428a555e | 887 | pass_signal_to_emacs (int signalnum) |
9628b887 KL |
888 | { |
889 | int old_errno = errno; | |
890 | ||
9f729af5 | 891 | if (emacs_pid) |
428a555e | 892 | kill (emacs_pid, signalnum); |
9f729af5 | 893 | |
428a555e | 894 | signal (signalnum, pass_signal_to_emacs); |
9f729af5 KL |
895 | errno = old_errno; |
896 | } | |
897 | ||
0b0d3e0b KL |
898 | /* Signal handler for SIGCONT; notify the Emacs process that it can |
899 | now resume our tty frame. */ | |
900 | ||
901 | SIGTYPE | |
902 | handle_sigcont (int signalnum) | |
903 | { | |
904 | int old_errno = errno; | |
905 | ||
906 | if (tcgetpgrp (1) == getpgrp ()) | |
907 | { | |
908 | /* We are in the foreground. */ | |
909 | fprintf (out, "-resume \n"); | |
910 | fflush (out); | |
911 | fsync (fileno (out)); | |
912 | } | |
913 | else | |
914 | { | |
915 | /* We are in the background; cancel the continue. */ | |
916 | kill (getpid (), SIGSTOP); | |
917 | } | |
c6c53c3e KL |
918 | |
919 | signal (signalnum, handle_sigcont); | |
0b0d3e0b KL |
920 | errno = old_errno; |
921 | } | |
922 | ||
923 | /* Signal handler for SIGTSTP; notify the Emacs process that we are | |
924 | going to sleep. Normally the suspend is initiated by Emacs via | |
925 | server-handle-suspend-tty, but if the server gets out of sync with | |
926 | reality, we may get a SIGTSTP on C-z. Handling this signal and | |
927 | notifying Emacs about it should get things under control again. */ | |
928 | ||
929 | SIGTYPE | |
930 | handle_sigtstp (int signalnum) | |
931 | { | |
932 | int old_errno = errno; | |
933 | sigset_t set; | |
934 | ||
935 | if (out) | |
936 | { | |
937 | fprintf (out, "-suspend \n"); | |
938 | fflush (out); | |
939 | fsync (fileno (out)); | |
940 | } | |
941 | ||
942 | /* Unblock this signal and call the default handler by temprarily | |
943 | changing the handler and resignalling. */ | |
944 | sigprocmask (SIG_BLOCK, NULL, &set); | |
945 | sigdelset (&set, signalnum); | |
946 | signal (signalnum, SIG_DFL); | |
947 | kill (getpid (), signalnum); | |
948 | sigprocmask (SIG_SETMASK, &set, NULL); /* Let's the above signal through. */ | |
949 | signal (signalnum, handle_sigtstp); | |
950 | ||
951 | errno = old_errno; | |
952 | } | |
953 | ||
da8e1115 | 954 | /* Set up signal handlers before opening a frame on the current tty. */ |
0b0d3e0b | 955 | |
4d553a13 KL |
956 | void |
957 | init_signals (void) | |
9628b887 KL |
958 | { |
959 | /* Set up signal handlers. */ | |
428a555e | 960 | signal (SIGWINCH, pass_signal_to_emacs); |
4ca927b4 KL |
961 | |
962 | /* Don't pass SIGINT and SIGQUIT to Emacs, because it has no way of | |
963 | deciding which terminal the signal came from. C-g is now a | |
964 | normal input event on secondary terminals. */ | |
965 | #if 0 | |
428a555e KL |
966 | signal (SIGINT, pass_signal_to_emacs); |
967 | signal (SIGQUIT, pass_signal_to_emacs); | |
4ca927b4 | 968 | #endif |
0b0d3e0b KL |
969 | |
970 | signal (SIGCONT, handle_sigcont); | |
971 | signal (SIGTSTP, handle_sigtstp); | |
972 | signal (SIGTTOU, handle_sigtstp); | |
9628b887 KL |
973 | } |
974 | ||
46cec291 | 975 | |
9f637eea | 976 | |
4d553a13 KL |
977 | /* Returns 1 if PREFIX is a prefix of STRING. */ |
978 | static int | |
979 | strprefix (char *prefix, char *string) | |
980 | { | |
981 | int i; | |
982 | if (! prefix) | |
983 | return 1; | |
984 | ||
985 | if (!string) | |
986 | return 0; | |
0b0d3e0b | 987 | |
4d553a13 KL |
988 | for (i = 0; prefix[i]; i++) |
989 | if (!string[i] || string[i] != prefix[i]) | |
990 | return 0; | |
991 | return 1; | |
992 | } | |
993 | ||
974b73e8 | 994 | |
aa0b6932 JB |
995 | HSOCKET |
996 | set_local_socket () | |
46cec291 | 997 | { |
aa0b6932 | 998 | HSOCKET s; |
46cec291 | 999 | struct sockaddr_un server; |
46cec291 | 1000 | |
e69233c2 | 1001 | /* |
46cec291 RS |
1002 | * Open up an AF_UNIX socket in this person's home directory |
1003 | */ | |
1004 | ||
1005 | if ((s = socket (AF_UNIX, SOCK_STREAM, 0)) < 0) | |
1006 | { | |
42073bfb | 1007 | message (TRUE, "%s: socket: %s\n", progname, strerror (errno)); |
aa0b6932 | 1008 | return INVALID_SOCKET; |
46cec291 | 1009 | } |
e69233c2 | 1010 | |
46cec291 | 1011 | server.sun_family = AF_UNIX; |
c5fee545 | 1012 | |
c5fee545 | 1013 | { |
9f637eea | 1014 | int sock_status = 0; |
5c9659d3 | 1015 | int default_sock = !socket_name; |
b80bf66e | 1016 | int saved_errno = 0; |
0b0d3e0b | 1017 | |
0734b0d0 | 1018 | char *server_name = "server"; |
0b0d3e0b | 1019 | |
0734b0d0 SM |
1020 | if (socket_name && !index (socket_name, '/') && !index (socket_name, '\\')) |
1021 | { /* socket_name is a file name component. */ | |
d3a6748c KL |
1022 | server_name = socket_name; |
1023 | socket_name = NULL; | |
1024 | default_sock = 1; /* Try both UIDs. */ | |
0734b0d0 | 1025 | } |
efb859b4 | 1026 | |
5c9659d3 | 1027 | if (default_sock) |
254107e4 | 1028 | { |
d3a6748c KL |
1029 | socket_name = alloca (100 + strlen (server_name)); |
1030 | sprintf (socket_name, "/tmp/emacs%d/%s", | |
1031 | (int) geteuid (), server_name); | |
254107e4 RS |
1032 | } |
1033 | ||
1034 | if (strlen (socket_name) < sizeof (server.sun_path)) | |
1035 | strcpy (server.sun_path, socket_name); | |
1036 | else | |
819b8f00 | 1037 | { |
974b73e8 KL |
1038 | message (TRUE, "%s: socket-name %s too long", |
1039 | progname, socket_name); | |
819b8f00 KL |
1040 | fail (); |
1041 | } | |
efb859b4 | 1042 | |
9f637eea GM |
1043 | /* See if the socket exists, and if it's owned by us. */ |
1044 | sock_status = socket_status (server.sun_path); | |
152b6e83 | 1045 | saved_errno = errno; |
5c9659d3 | 1046 | if (sock_status && default_sock) |
efb859b4 | 1047 | { |
9f637eea GM |
1048 | /* Failing that, see if LOGNAME or USER exist and differ from |
1049 | our euid. If so, look for a socket based on the UID | |
1050 | associated with the name. This is reminiscent of the logic | |
1051 | that init_editfns uses to set the global Vuser_full_name. */ | |
e69233c2 | 1052 | |
9f637eea | 1053 | char *user_name = (char *) getenv ("LOGNAME"); |
293f9f2a | 1054 | |
9f637eea GM |
1055 | if (!user_name) |
1056 | user_name = (char *) getenv ("USER"); | |
e69233c2 | 1057 | |
9f637eea GM |
1058 | if (user_name) |
1059 | { | |
1060 | struct passwd *pw = getpwnam (user_name); | |
293f9f2a | 1061 | |
9f637eea GM |
1062 | if (pw && (pw->pw_uid != geteuid ())) |
1063 | { | |
1064 | /* We're running under su, apparently. */ | |
0734b0d0 SM |
1065 | socket_name = alloca (100 + strlen (server_name)); |
1066 | sprintf (socket_name, "/tmp/emacs%d/%s", | |
1067 | (int) pw->pw_uid, server_name); | |
5c9659d3 SM |
1068 | |
1069 | if (strlen (socket_name) < sizeof (server.sun_path)) | |
1070 | strcpy (server.sun_path, socket_name); | |
1071 | else | |
1072 | { | |
42073bfb | 1073 | message (TRUE, "%s: socket-name %s too long", |
aa0b6932 | 1074 | progname, socket_name); |
65396510 | 1075 | exit (EXIT_FAILURE); |
5c9659d3 SM |
1076 | } |
1077 | ||
9f637eea | 1078 | sock_status = socket_status (server.sun_path); |
b80bf66e | 1079 | saved_errno = errno; |
9f637eea | 1080 | } |
293f9f2a RS |
1081 | else |
1082 | errno = saved_errno; | |
9f637eea | 1083 | } |
efb859b4 | 1084 | } |
e69233c2 | 1085 | |
aa0b6932 JB |
1086 | switch (sock_status) |
1087 | { | |
1088 | case 1: | |
974b73e8 KL |
1089 | /* There's a socket, but it isn't owned by us. This is OK if |
1090 | we are root. */ | |
1091 | if (0 != geteuid ()) | |
1092 | { | |
1093 | message (TRUE, "%s: Invalid socket owner\n", progname); | |
aa0b6932 | 1094 | return INVALID_SOCKET; |
974b73e8 KL |
1095 | } |
1096 | break; | |
aa0b6932 JB |
1097 | |
1098 | case 2: | |
974b73e8 KL |
1099 | /* `stat' failed */ |
1100 | if (saved_errno == ENOENT) | |
1101 | message (TRUE, | |
1102 | "%s: can't find socket; have you started the server?\n\ | |
45adde32 | 1103 | To start the server in Emacs, type \"M-x server-start\".\n", |
aa0b6932 | 1104 | progname); |
974b73e8 KL |
1105 | else |
1106 | message (TRUE, "%s: can't stat %s: %s\n", | |
aa0b6932 | 1107 | progname, server.sun_path, strerror (saved_errno)); |
974b73e8 | 1108 | return INVALID_SOCKET; |
aa0b6932 | 1109 | } |
efb859b4 | 1110 | } |
46cec291 | 1111 | |
4e23f2ba JB |
1112 | if (connect (s, (struct sockaddr *) &server, strlen (server.sun_path) + 2) |
1113 | < 0) | |
46cec291 | 1114 | { |
42073bfb | 1115 | message (TRUE, "%s: connect: %s\n", progname, strerror (errno)); |
aa0b6932 | 1116 | return INVALID_SOCKET; |
46cec291 | 1117 | } |
23a7488d | 1118 | |
aa0b6932 JB |
1119 | return s; |
1120 | } | |
1121 | #endif /* ! NO_SOCKETS_IN_FILE_SYSTEM */ | |
1122 | ||
1123 | HSOCKET | |
1124 | set_socket () | |
1125 | { | |
b03d27bd | 1126 | HSOCKET s; |
974b73e8 | 1127 | |
b03d27bd | 1128 | INITIALIZE (); |
974b73e8 | 1129 | |
aa0b6932 | 1130 | #ifndef NO_SOCKETS_IN_FILE_SYSTEM |
b03d27bd JB |
1131 | /* Explicit --socket-name argument. */ |
1132 | if (socket_name) | |
46cec291 | 1133 | { |
b03d27bd JB |
1134 | s = set_local_socket (); |
1135 | if ((s != INVALID_SOCKET) || alternate_editor) | |
974b73e8 | 1136 | return s; |
42073bfb | 1137 | message (TRUE, "%s: error accessing socket \"%s\"", |
974b73e8 | 1138 | progname, socket_name); |
b03d27bd | 1139 | exit (EXIT_FAILURE); |
46cec291 | 1140 | } |
b03d27bd JB |
1141 | #endif |
1142 | ||
1143 | /* Explicit --server-file arg or EMACS_SERVER_FILE variable. */ | |
1144 | if (!server_file) | |
1145 | server_file = getenv ("EMACS_SERVER_FILE"); | |
46cec291 | 1146 | |
b03d27bd | 1147 | if (server_file) |
23a7488d | 1148 | { |
b03d27bd JB |
1149 | s = set_tcp_socket (); |
1150 | if ((s != INVALID_SOCKET) || alternate_editor) | |
974b73e8 KL |
1151 | return s; |
1152 | ||
42073bfb | 1153 | message (TRUE, "%s: error accessing server file \"%s\"", |
974b73e8 | 1154 | progname, server_file); |
b03d27bd | 1155 | exit (EXIT_FAILURE); |
23a7488d | 1156 | } |
974b73e8 | 1157 | |
b03d27bd JB |
1158 | #ifndef NO_SOCKETS_IN_FILE_SYSTEM |
1159 | /* Implicit local socket. */ | |
1160 | s = set_local_socket (); | |
1161 | if (s != INVALID_SOCKET) | |
1162 | return s; | |
1163 | #endif | |
23a7488d | 1164 | |
b03d27bd JB |
1165 | /* Implicit server file. */ |
1166 | server_file = "server"; | |
1167 | s = set_tcp_socket (); | |
1168 | if ((s != INVALID_SOCKET) || alternate_editor) | |
1169 | return s; | |
1170 | ||
1171 | /* No implicit or explicit socket, and no alternate editor. */ | |
42073bfb | 1172 | message (TRUE, "%s: No socket or alternate editor. Please use:\n\n" |
b03d27bd JB |
1173 | #ifndef NO_SOCKETS_IN_FILE_SYSTEM |
1174 | "\t--socket-name\n" | |
ee6a193c | 1175 | #endif |
b03d27bd JB |
1176 | "\t--server-file (or environment variable EMACS_SERVER_FILE)\n\ |
1177 | \t--alternate-editor (or environment variable ALTERNATE_EDITOR)\n", | |
1178 | progname); | |
1179 | exit (EXIT_FAILURE); | |
aa0b6932 | 1180 | } |
46cec291 | 1181 | |
0e0dced5 JB |
1182 | #ifdef WINDOWSNT |
1183 | FARPROC set_fg; /* Pointer to AllowSetForegroundWindow. */ | |
1184 | FARPROC get_wc; /* Pointer to RealGetWindowClassA. */ | |
1185 | ||
1186 | BOOL CALLBACK | |
1187 | w32_find_emacs_process (hWnd, lParam) | |
1188 | HWND hWnd; | |
1189 | LPARAM lParam; | |
1190 | { | |
1191 | DWORD pid; | |
1192 | char class[6]; | |
1193 | ||
1194 | /* Reject any window not of class "Emacs". */ | |
1195 | if (! get_wc (hWnd, class, sizeof (class)) | |
1196 | || strcmp (class, "Emacs")) | |
1197 | return TRUE; | |
1198 | ||
1199 | /* We only need the process id, not the thread id. */ | |
1200 | (void) GetWindowThreadProcessId (hWnd, &pid); | |
1201 | ||
1202 | /* Not the one we're looking for. */ | |
1203 | if (pid != (DWORD) emacs_pid) return TRUE; | |
1204 | ||
1205 | /* OK, let's raise it. */ | |
1206 | set_fg (emacs_pid); | |
1207 | ||
1208 | /* Stop enumeration. */ | |
1209 | return FALSE; | |
1210 | } | |
1211 | ||
1212 | /* | |
1213 | * Search for a window of class "Emacs" and owned by a process with | |
1214 | * process id = emacs_pid. If found, allow it to grab the focus. | |
1215 | */ | |
1216 | void | |
1217 | w32_give_focus () | |
1218 | { | |
1219 | HMODULE hUser32; | |
1220 | ||
1221 | /* It should'nt happen when dealing with TCP sockets. */ | |
1222 | if (!emacs_pid) return; | |
1223 | ||
1224 | if (!(hUser32 = LoadLibrary ("user32.dll"))) return; | |
1225 | ||
1226 | /* Modern Windows restrict which processes can set the foreground window. | |
1227 | emacsclient can allow Emacs to grab the focus by calling the function | |
1228 | AllowSetForegroundWindow. Unfortunately, older Windows (W95, W98 and | |
1229 | NT) lack this function, so we have to check its availability. */ | |
1230 | if ((set_fg = GetProcAddress (hUser32, "AllowSetForegroundWindow")) | |
1231 | && (get_wc = GetProcAddress (hUser32, "RealGetWindowClassA"))) | |
1232 | EnumWindows (w32_find_emacs_process, (LPARAM) 0); | |
1233 | ||
1234 | FreeLibrary (hUser32); | |
1235 | } | |
1236 | #endif | |
1237 | ||
aa0b6932 JB |
1238 | int |
1239 | main (argc, argv) | |
1240 | int argc; | |
1241 | char **argv; | |
1242 | { | |
1243 | HSOCKET s; | |
1244 | int i, rl, needlf = 0; | |
974b73e8 | 1245 | char *cwd, *str; |
aa0b6932 JB |
1246 | char string[BUFSIZ+1]; |
1247 | ||
974b73e8 KL |
1248 | main_argc = argc; |
1249 | main_argv = argv; | |
aa0b6932 JB |
1250 | progname = argv[0]; |
1251 | ||
1252 | /* Process options. */ | |
1253 | decode_options (argc, argv); | |
1254 | ||
974b73e8 | 1255 | if ((argc - optind < 1) && !eval && !tty && !window_system) |
23a7488d | 1256 | { |
974b73e8 KL |
1257 | message (TRUE, "%s: file name or argument required\n" |
1258 | "Try `%s --help' for more information\n", | |
1259 | progname, progname); | |
aa0b6932 | 1260 | exit (EXIT_FAILURE); |
23a7488d RS |
1261 | } |
1262 | ||
aa0b6932 | 1263 | if ((s = set_socket ()) == INVALID_SOCKET) |
974b73e8 | 1264 | fail (); |
aa0b6932 | 1265 | |
974b73e8 KL |
1266 | |
1267 | cwd = get_current_dir_name (); | |
46cec291 RS |
1268 | if (cwd == 0) |
1269 | { | |
1270 | /* getwd puts message in STRING if it fails. */ | |
974b73e8 KL |
1271 | message (TRUE, "%s: %s\n", progname, |
1272 | "Cannot get current working directory"); | |
819b8f00 | 1273 | fail (); |
46cec291 RS |
1274 | } |
1275 | ||
c66648e0 | 1276 | #ifdef WINDOWSNT |
0e0dced5 | 1277 | w32_give_focus (); |
c66648e0 JB |
1278 | #endif |
1279 | ||
a9298135 | 1280 | /* First of all, send our version number for verification. */ |
974b73e8 KL |
1281 | SEND_STRING ("-version "); |
1282 | SEND_STRING (VERSION); | |
1283 | SEND_STRING (" "); | |
0b0d3e0b | 1284 | |
9002956f | 1285 | /* Send over our environment. */ |
59e085e0 KL |
1286 | if (!current_frame) |
1287 | { | |
1288 | extern char **environ; | |
1289 | int i; | |
1290 | for (i = 0; environ[i]; i++) | |
1291 | { | |
1292 | char *name = xstrdup (environ[i]); | |
1293 | char *value = strchr (name, '='); | |
974b73e8 KL |
1294 | SEND_STRING ("-env "); |
1295 | SEND_QUOTED (environ[i]); | |
1296 | SEND_STRING (" "); | |
59e085e0 KL |
1297 | } |
1298 | } | |
9002956f | 1299 | |
2828d5f9 KL |
1300 | /* Send over our current directory. */ |
1301 | if (!current_frame) | |
1302 | { | |
974b73e8 KL |
1303 | SEND_STRING ("-dir "); |
1304 | SEND_QUOTED (cwd); | |
1305 | SEND_STRING ("/"); | |
1306 | SEND_STRING (" "); | |
2828d5f9 KL |
1307 | } |
1308 | ||
6afdd335 | 1309 | retry: |
5212210c | 1310 | if (nowait) |
aa0b6932 | 1311 | SEND_STRING ("-nowait "); |
292d74a3 | 1312 | |
92071250 | 1313 | if (current_frame) |
974b73e8 | 1314 | SEND_STRING ("-current-frame "); |
92071250 | 1315 | |
30be2360 | 1316 | if (display) |
87209357 | 1317 | { |
aa0b6932 JB |
1318 | SEND_STRING ("-display "); |
1319 | SEND_QUOTED (display); | |
1320 | SEND_STRING (" "); | |
87209357 | 1321 | } |
30be2360 | 1322 | |
77134727 | 1323 | if (tty) |
9628b887 | 1324 | { |
4d553a13 | 1325 | char *tty_name = ttyname (fileno (stdin)); |
2fc0cf2a | 1326 | char *type = getenv ("TERM"); |
0b0d3e0b | 1327 | |
4d553a13 | 1328 | if (! tty_name) |
2fc0cf2a | 1329 | { |
974b73e8 | 1330 | message (TRUE, "%s: could not get terminal name\n", progname); |
2fc0cf2a KL |
1331 | fail (); |
1332 | } | |
1333 | ||
1334 | if (! type) | |
1335 | { | |
974b73e8 | 1336 | message (TRUE, "%s: please set the TERM variable to your terminal type\n", |
2fc0cf2a KL |
1337 | progname); |
1338 | fail (); | |
1339 | } | |
1340 | ||
1341 | if (! strcmp (type, "eterm")) | |
1342 | { | |
1343 | /* This causes nasty, MULTI_KBOARD-related input lockouts. */ | |
974b73e8 | 1344 | message (TRUE, "%s: opening a frame in an Emacs term buffer" |
2fc0cf2a KL |
1345 | " is not supported\n", progname); |
1346 | fail (); | |
1347 | } | |
0b0d3e0b | 1348 | |
4d553a13 | 1349 | init_signals (); |
0b0d3e0b | 1350 | |
974b73e8 KL |
1351 | SEND_STRING ("-tty "); |
1352 | SEND_QUOTED (tty_name); | |
1353 | SEND_STRING (" "); | |
1354 | SEND_QUOTED (type); | |
1355 | SEND_STRING (" "); | |
9628b887 | 1356 | } |
77134727 KL |
1357 | |
1358 | if (window_system) | |
974b73e8 | 1359 | SEND_STRING ("-window-system "); |
0b0d3e0b | 1360 | |
87209357 | 1361 | if ((argc - optind > 0)) |
5212210c | 1362 | { |
87209357 | 1363 | for (i = optind; i < argc; i++) |
46cec291 | 1364 | { |
0b0d3e0b KL |
1365 | int relative = 0; |
1366 | ||
87209357 | 1367 | if (eval) |
0b0d3e0b | 1368 | { |
974b73e8 KL |
1369 | /* Don't prepend cwd or anything like that. */ |
1370 | SEND_STRING ("-eval "); | |
1371 | SEND_QUOTED (argv[i]); | |
1372 | SEND_STRING (" "); | |
0b0d3e0b KL |
1373 | continue; |
1374 | } | |
1375 | ||
1376 | if (*argv[i] == '+') | |
1377 | { | |
87209357 EZ |
1378 | char *p = argv[i] + 1; |
1379 | while (isdigit ((unsigned char) *p) || *p == ':') p++; | |
0b0d3e0b KL |
1380 | if (*p == 0) |
1381 | { | |
974b73e8 KL |
1382 | SEND_STRING ("-position "); |
1383 | SEND_QUOTED (argv[i]); | |
1384 | SEND_STRING (" "); | |
0b0d3e0b KL |
1385 | continue; |
1386 | } | |
1387 | else | |
1388 | relative = 1; | |
1389 | } | |
b03d27bd | 1390 | else if (! file_name_absolute_p (argv[i])) |
0b0d3e0b KL |
1391 | relative = 1; |
1392 | ||
974b73e8 | 1393 | SEND_STRING ("-file "); |
0b0d3e0b KL |
1394 | if (relative) |
1395 | { | |
974b73e8 KL |
1396 | SEND_QUOTED (cwd); |
1397 | SEND_STRING ("/"); | |
0b0d3e0b | 1398 | } |
974b73e8 KL |
1399 | SEND_QUOTED (argv[i]); |
1400 | SEND_STRING (" "); | |
0b0d3e0b | 1401 | } |
46cec291 | 1402 | } |
87209357 EZ |
1403 | else |
1404 | { | |
77134727 | 1405 | if (!tty && !window_system) |
9628b887 KL |
1406 | { |
1407 | while ((str = fgets (string, BUFSIZ, stdin))) | |
1408 | { | |
0b0d3e0b | 1409 | if (eval) |
974b73e8 | 1410 | SEND_STRING ("-eval "); |
0b0d3e0b | 1411 | else |
974b73e8 KL |
1412 | SEND_STRING ("-file "); |
1413 | SEND_QUOTED (out); | |
9628b887 | 1414 | } |
974b73e8 | 1415 | SEND_STRING (" "); |
9628b887 | 1416 | } |
87209357 | 1417 | } |
0b0d3e0b | 1418 | |
aa0b6932 | 1419 | SEND_STRING ("\n"); |
46cec291 | 1420 | |
fc2040c0 KL |
1421 | /* Wait for an answer. */ |
1422 | if (!eval && !tty && !nowait) | |
30be2360 SM |
1423 | { |
1424 | printf ("Waiting for Emacs..."); | |
1425 | needlf = 2; | |
1426 | } | |
46cec291 | 1427 | fflush (stdout); |
0b0d3e0b | 1428 | fsync (1); |
46cec291 | 1429 | |
3cf8c6aa | 1430 | /* Now, wait for an answer and print any messages. */ |
974b73e8 | 1431 | while ((rl = recv (s, string, BUFSIZ, 0)) > 0) |
3cf8c6aa | 1432 | { |
974b73e8 KL |
1433 | char *p; |
1434 | string[rl] = '\0'; | |
1435 | ||
1436 | p = string + strlen (string) - 1; | |
1437 | while (p > string && *p == '\n') | |
0b0d3e0b KL |
1438 | *p-- = 0; |
1439 | ||
974b73e8 | 1440 | if (strprefix ("-good-version ", string)) |
a9298135 | 1441 | { |
6afdd335 | 1442 | /* -good-version: The versions match. */ |
a9298135 | 1443 | } |
974b73e8 | 1444 | else if (strprefix ("-emacs-pid ", string)) |
4d553a13 | 1445 | { |
6afdd335 | 1446 | /* -emacs-pid PID: The process id of the Emacs process. */ |
77134727 KL |
1447 | emacs_pid = strtol (string + strlen ("-emacs-pid"), NULL, 10); |
1448 | } | |
974b73e8 | 1449 | else if (strprefix ("-window-system-unsupported ", string)) |
6afdd335 KL |
1450 | { |
1451 | /* -window-system-unsupported: Emacs was compiled without X | |
1452 | support. Try again on the terminal. */ | |
1453 | window_system = 0; | |
1454 | nowait = 0; | |
1455 | tty = 1; | |
1456 | goto retry; | |
1457 | } | |
974b73e8 | 1458 | else if (strprefix ("-print ", string)) |
77134727 | 1459 | { |
6afdd335 | 1460 | /* -print STRING: Print STRING on the terminal. */ |
974b73e8 | 1461 | str = unquote_argument (string + strlen ("-print ")); |
0b0d3e0b | 1462 | if (needlf) |
77134727 | 1463 | printf ("\n"); |
0b0d3e0b KL |
1464 | printf ("%s", str); |
1465 | needlf = str[0] == '\0' ? needlf : str[strlen (str) - 1] != '\n'; | |
77134727 | 1466 | } |
974b73e8 | 1467 | else if (strprefix ("-error ", string)) |
77134727 | 1468 | { |
6afdd335 | 1469 | /* -error DESCRIPTION: Signal an error on the terminal. */ |
974b73e8 | 1470 | str = unquote_argument (string + strlen ("-error ")); |
0b0d3e0b KL |
1471 | if (needlf) |
1472 | printf ("\n"); | |
974b73e8 | 1473 | fprintf (stderr, "*ERROR*: %s", str); |
0b0d3e0b KL |
1474 | needlf = str[0] == '\0' ? needlf : str[strlen (str) - 1] != '\n'; |
1475 | } | |
1476 | else if (strprefix ("-suspend ", str)) | |
1477 | { | |
6afdd335 | 1478 | /* -suspend: Suspend this terminal, i.e., stop the process. */ |
0b0d3e0b | 1479 | if (needlf) |
77134727 | 1480 | printf ("\n"); |
0b0d3e0b KL |
1481 | needlf = 0; |
1482 | kill (0, SIGSTOP); | |
4d553a13 KL |
1483 | } |
1484 | else | |
1485 | { | |
6afdd335 | 1486 | /* Unknown command. */ |
0b0d3e0b | 1487 | if (needlf) |
4d553a13 | 1488 | printf ("\n"); |
974b73e8 KL |
1489 | printf ("*ERROR*: Unknown message: %s", string); |
1490 | needlf = string[0] == '\0' ? needlf : string[strlen (string) - 1] != '\n'; | |
4d553a13 | 1491 | } |
3cf8c6aa SM |
1492 | } |
1493 | ||
1494 | if (needlf) | |
1495 | printf ("\n"); | |
1496 | fflush (stdout); | |
0b0d3e0b | 1497 | fsync (1); |
23a7488d | 1498 | |
aa0b6932 | 1499 | CLOSE_SOCKET (s); |
65396510 | 1500 | return EXIT_SUCCESS; |
46cec291 RS |
1501 | } |
1502 | ||
1e7823d0 | 1503 | #endif /* HAVE_SOCKETS && HAVE_INET_SOCKETS */ |
aa0b6932 | 1504 | |
27711600 RM |
1505 | \f |
1506 | #ifndef HAVE_STRERROR | |
1507 | char * | |
1508 | strerror (errnum) | |
1509 | int errnum; | |
1510 | { | |
1511 | extern char *sys_errlist[]; | |
1512 | extern int sys_nerr; | |
1513 | ||
1514 | if (errnum >= 0 && errnum < sys_nerr) | |
1515 | return sys_errlist[errnum]; | |
1516 | return (char *) "Unknown error"; | |
1517 | } | |
1518 | ||
1519 | #endif /* ! HAVE_STRERROR */ | |
ab5796a9 MB |
1520 | |
1521 | /* arch-tag: f39bb9c4-73eb-477e-896d-50832e2ca9a7 | |
1522 | (do not change this comment) */ | |
65396510 TTN |
1523 | |
1524 | /* emacsclient.c ends here */ |