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, |
f5d0ac07 | 3 | 2005, 2006, 2007, 2008, 2009 Free Software Foundation, Inc. |
46cec291 RS |
4 | |
5 | This file is part of GNU Emacs. | |
6 | ||
294981c7 | 7 | GNU Emacs is free software: you can redistribute it and/or modify |
46cec291 | 8 | it under the terms of the GNU General Public License as published by |
294981c7 GM |
9 | the Free Software Foundation, either version 3 of the License, or |
10 | (at your option) any later version. | |
46cec291 RS |
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 | |
294981c7 | 18 | along with GNU Emacs. If not, see <http://www.gnu.org/licenses/>. */ |
46cec291 RS |
19 | |
20 | ||
e69233c2 | 21 | #ifdef HAVE_CONFIG_H |
2f8fe2f4 | 22 | #include <config.h> |
e69233c2 PJ |
23 | #endif |
24 | ||
aa0b6932 | 25 | #ifdef WINDOWSNT |
aa0b6932 | 26 | |
bc28de71 JB |
27 | /* config.h defines these, which disables sockets altogether! */ |
28 | # undef _WINSOCKAPI_ | |
29 | # undef _WINSOCK_H | |
30 | ||
411b80a5 JB |
31 | # include <malloc.h> |
32 | # include <stdlib.h> | |
42073bfb | 33 | # include <windows.h> |
dbf60b07 | 34 | # include <commctrl.h> |
411b80a5 | 35 | |
411b80a5 JB |
36 | # define NO_SOCKETS_IN_FILE_SYSTEM |
37 | ||
aa0b6932 JB |
38 | # define HSOCKET SOCKET |
39 | # define CLOSE_SOCKET closesocket | |
aa0b6932 | 40 | # define INITIALIZE() (initialize_sockets ()) |
411b80a5 JB |
41 | |
42 | #else /* !WINDOWSNT */ | |
43 | ||
67c1df01 | 44 | # include "syswait.h" |
ed4a3730 | 45 | |
1e7823d0 JB |
46 | # ifdef HAVE_INET_SOCKETS |
47 | # include <netinet/in.h> | |
48 | # endif | |
411b80a5 | 49 | |
18d2ad29 | 50 | # include <arpa/inet.h> |
448d4085 | 51 | |
e35fc962 | 52 | # define INVALID_SOCKET -1 |
aa0b6932 JB |
53 | # define HSOCKET int |
54 | # define CLOSE_SOCKET close | |
aa0b6932 | 55 | # define INITIALIZE() |
411b80a5 | 56 | |
5445ab06 DN |
57 | # ifndef WCONTINUED |
58 | # define WCONTINUED 8 | |
59 | # endif | |
60 | ||
411b80a5 | 61 | #endif /* !WINDOWSNT */ |
aa0b6932 | 62 | |
4e23f2ba | 63 | #undef signal |
46cec291 | 64 | |
42073bfb | 65 | #include <stdarg.h> |
e69233c2 | 66 | #include <ctype.h> |
8f9aaa0a | 67 | #include <stdio.h> |
aa0b6932 | 68 | #include "getopt.h" |
79f13bba DL |
69 | #ifdef HAVE_UNISTD_H |
70 | #include <unistd.h> | |
71 | #endif | |
8f9aaa0a | 72 | |
aa0b6932 JB |
73 | #ifdef WINDOWSNT |
74 | # include <io.h> | |
75 | #else /* not WINDOWSNT */ | |
9f637eea | 76 | # include <pwd.h> |
aa0b6932 | 77 | #endif /* not WINDOWSNT */ |
dc4a4a14 | 78 | #include <sys/stat.h> |
9f637eea | 79 | |
9628b887 | 80 | #include <signal.h> |
4d553a13 | 81 | #include <errno.h> |
9628b887 KL |
82 | |
83 | \f | |
8f9aaa0a | 84 | char *getenv (), *getwd (); |
5b9562c3 | 85 | char *(getcwd) (); |
8f9aaa0a | 86 | |
7ce8671d JB |
87 | #ifdef WINDOWSNT |
88 | char *w32_getenv (); | |
89 | #define egetenv(VAR) w32_getenv(VAR) | |
90 | #else | |
91 | #define egetenv(VAR) getenv(VAR) | |
92 | #endif | |
93 | ||
8f9aaa0a RS |
94 | #ifndef VERSION |
95 | #define VERSION "unspecified" | |
96 | #endif | |
97 | \f | |
aa0b6932 JB |
98 | |
99 | #ifndef EXIT_SUCCESS | |
100 | #define EXIT_SUCCESS 0 | |
101 | #endif | |
102 | ||
103 | #ifndef EXIT_FAILURE | |
104 | #define EXIT_FAILURE 1 | |
105 | #endif | |
106 | ||
107 | #ifndef FALSE | |
108 | #define FALSE 0 | |
109 | #endif | |
110 | ||
111 | #ifndef TRUE | |
112 | #define TRUE 1 | |
113 | #endif | |
114 | ||
115 | #ifndef NO_RETURN | |
116 | #define NO_RETURN | |
117 | #endif | |
bc558f3e JB |
118 | |
119 | /* Additional space when allocating buffers for filenames, etc. */ | |
120 | #define EXTRA_SPACE 100 | |
121 | ||
aa0b6932 | 122 | \f |
8f9aaa0a RS |
123 | /* Name used to invoke this program. */ |
124 | char *progname; | |
125 | ||
0a125897 KL |
126 | /* The second argument to main. */ |
127 | char **main_argv; | |
128 | ||
749ae770 | 129 | /* Nonzero means don't wait for a response from Emacs. --no-wait. */ |
8f9aaa0a RS |
130 | int nowait = 0; |
131 | ||
30be2360 SM |
132 | /* Nonzero means args are expressions to be evaluated. --eval. */ |
133 | int eval = 0; | |
134 | ||
31fa6595 SM |
135 | /* Nonzero means don't open a new frame. Inverse of --create-frame. */ |
136 | int current_frame = 1; | |
92071250 | 137 | |
30be2360 SM |
138 | /* The display on which Emacs should work. --display. */ |
139 | char *display = NULL; | |
140 | ||
9628b887 | 141 | /* Nonzero means open a new Emacs frame on the current terminal. */ |
77134727 | 142 | int tty = 0; |
9628b887 | 143 | |
30be2360 SM |
144 | /* If non-NULL, the name of an editor to fallback to if the server |
145 | is not running. --alternate-editor. */ | |
b03d27bd | 146 | const char *alternate_editor = NULL; |
30be2360 | 147 | |
3db926be | 148 | /* If non-NULL, the filename of the UNIX socket. */ |
254107e4 RS |
149 | char *socket_name = NULL; |
150 | ||
aa0b6932 JB |
151 | /* If non-NULL, the filename of the authentication file. */ |
152 | char *server_file = NULL; | |
153 | ||
c66648e0 JB |
154 | /* PID of the Emacs server process. */ |
155 | int emacs_pid = 0; | |
156 | ||
2381d38d | 157 | void print_help_and_exit () NO_RETURN; |
7f3bff3e | 158 | |
8f9aaa0a RS |
159 | struct option longopts[] = |
160 | { | |
749ae770 | 161 | { "no-wait", no_argument, NULL, 'n' }, |
30be2360 | 162 | { "eval", no_argument, NULL, 'e' }, |
8f9aaa0a RS |
163 | { "help", no_argument, NULL, 'H' }, |
164 | { "version", no_argument, NULL, 'V' }, | |
b28c910d | 165 | { "tty", no_argument, NULL, 't' }, |
dc1cd5f7 | 166 | { "nw", no_argument, NULL, 't' }, |
31fa6595 | 167 | { "create-frame", no_argument, NULL, 'c' }, |
3cf8c6aa | 168 | { "alternate-editor", required_argument, NULL, 'a' }, |
b03d27bd | 169 | #ifndef NO_SOCKETS_IN_FILE_SYSTEM |
254107e4 | 170 | { "socket-name", required_argument, NULL, 's' }, |
b03d27bd | 171 | #endif |
aa0b6932 | 172 | { "server-file", required_argument, NULL, 'f' }, |
0ebec7d3 | 173 | #ifndef WINDOWSNT |
30be2360 | 174 | { "display", required_argument, NULL, 'd' }, |
0ebec7d3 | 175 | #endif |
30be2360 | 176 | { 0, 0, 0, 0 } |
8f9aaa0a RS |
177 | }; |
178 | ||
974b73e8 KL |
179 | \f |
180 | /* Like malloc but get fatal error if memory is exhausted. */ | |
181 | ||
182 | long * | |
183 | xmalloc (size) | |
184 | unsigned int size; | |
185 | { | |
186 | long *result = (long *) malloc (size); | |
187 | if (result == NULL) | |
188 | { | |
189 | perror ("malloc"); | |
190 | exit (EXIT_FAILURE); | |
191 | } | |
192 | return result; | |
193 | } | |
194 | ||
195 | /* Like strdup but get a fatal error if memory is exhausted. */ | |
196 | ||
197 | char * | |
198 | xstrdup (const char *s) | |
199 | { | |
200 | char *result = strdup (s); | |
201 | if (result == NULL) | |
202 | { | |
203 | perror ("strdup"); | |
204 | exit (EXIT_FAILURE); | |
205 | } | |
206 | return result; | |
207 | } | |
208 | ||
209 | /* From sysdep.c */ | |
210 | #if !defined (HAVE_GET_CURRENT_DIR_NAME) || defined (BROKEN_GET_CURRENT_DIR_NAME) | |
211 | ||
cb06b8dc SM |
212 | /* From lisp.h */ |
213 | #ifndef DIRECTORY_SEP | |
214 | #define DIRECTORY_SEP '/' | |
215 | #endif | |
216 | #ifndef IS_DIRECTORY_SEP | |
217 | #define IS_DIRECTORY_SEP(_c_) ((_c_) == DIRECTORY_SEP) | |
218 | #endif | |
219 | #ifndef IS_DEVICE_SEP | |
220 | #ifndef DEVICE_SEP | |
221 | #define IS_DEVICE_SEP(_c_) 0 | |
222 | #else | |
223 | #define IS_DEVICE_SEP(_c_) ((_c_) == DEVICE_SEP) | |
224 | #endif | |
225 | #endif | |
226 | #ifndef IS_ANY_SEP | |
227 | #define IS_ANY_SEP(_c_) (IS_DIRECTORY_SEP (_c_)) | |
228 | #endif | |
229 | ||
230 | ||
974b73e8 | 231 | /* Return the current working directory. Returns NULL on errors. |
5ab73228 | 232 | Any other returned value must be freed with free. This is used |
974b73e8 KL |
233 | only when get_current_dir_name is not defined on the system. */ |
234 | char* | |
235 | get_current_dir_name () | |
236 | { | |
237 | char *buf; | |
238 | char *pwd; | |
239 | struct stat dotstat, pwdstat; | |
240 | /* If PWD is accurate, use it instead of calling getwd. PWD is | |
241 | sometimes a nicer name, and using it may avoid a fatal error if a | |
242 | parent directory is searchable but not readable. */ | |
7ce8671d | 243 | if ((pwd = egetenv ("PWD")) != 0 |
974b73e8 KL |
244 | && (IS_DIRECTORY_SEP (*pwd) || (*pwd && IS_DEVICE_SEP (pwd[1]))) |
245 | && stat (pwd, &pwdstat) == 0 | |
246 | && stat (".", &dotstat) == 0 | |
247 | && dotstat.st_ino == pwdstat.st_ino | |
248 | && dotstat.st_dev == pwdstat.st_dev | |
249 | #ifdef MAXPATHLEN | |
250 | && strlen (pwd) < MAXPATHLEN | |
251 | #endif | |
252 | ) | |
253 | { | |
254 | buf = (char *) xmalloc (strlen (pwd) + 1); | |
255 | if (!buf) | |
256 | return NULL; | |
257 | strcpy (buf, pwd); | |
258 | } | |
259 | #ifdef HAVE_GETCWD | |
260 | else | |
261 | { | |
262 | size_t buf_size = 1024; | |
263 | buf = (char *) xmalloc (buf_size); | |
264 | if (!buf) | |
265 | return NULL; | |
266 | for (;;) | |
267 | { | |
268 | if (getcwd (buf, buf_size) == buf) | |
269 | break; | |
270 | if (errno != ERANGE) | |
271 | { | |
272 | int tmp_errno = errno; | |
273 | free (buf); | |
274 | errno = tmp_errno; | |
275 | return NULL; | |
276 | } | |
277 | buf_size *= 2; | |
278 | buf = (char *) realloc (buf, buf_size); | |
279 | if (!buf) | |
280 | return NULL; | |
281 | } | |
282 | } | |
283 | #else | |
284 | else | |
285 | { | |
286 | /* We need MAXPATHLEN here. */ | |
287 | buf = (char *) xmalloc (MAXPATHLEN + 1); | |
288 | if (!buf) | |
289 | return NULL; | |
290 | if (getwd (buf) == NULL) | |
291 | { | |
292 | int tmp_errno = errno; | |
293 | free (buf); | |
294 | errno = tmp_errno; | |
295 | return NULL; | |
296 | } | |
297 | } | |
298 | #endif | |
299 | return buf; | |
300 | } | |
301 | #endif | |
302 | ||
42073bfb | 303 | #ifdef WINDOWSNT |
7ce8671d JB |
304 | |
305 | #define REG_ROOT "SOFTWARE\\GNU\\Emacs" | |
306 | ||
307 | /* Retrieve an environment variable from the Emacs subkeys of the registry. | |
308 | Return NULL if the variable was not found, or it was empty. | |
309 | This code is based on w32_get_resource (w32.c). */ | |
310 | char * | |
311 | w32_get_resource (predefined, key, type) | |
312 | HKEY predefined; | |
313 | char *key; | |
314 | LPDWORD type; | |
315 | { | |
316 | HKEY hrootkey = NULL; | |
317 | char *result = NULL; | |
318 | DWORD cbData; | |
319 | ||
320 | if (RegOpenKeyEx (predefined, REG_ROOT, 0, KEY_READ, &hrootkey) == ERROR_SUCCESS) | |
321 | { | |
322 | if (RegQueryValueEx (hrootkey, key, NULL, NULL, NULL, &cbData) == ERROR_SUCCESS) | |
323 | { | |
324 | result = (char *) xmalloc (cbData); | |
325 | ||
bc558f3e JB |
326 | if ((RegQueryValueEx (hrootkey, key, NULL, type, result, &cbData) != ERROR_SUCCESS) |
327 | || (*result == 0)) | |
7ce8671d JB |
328 | { |
329 | free (result); | |
330 | result = NULL; | |
331 | } | |
332 | } | |
333 | ||
334 | RegCloseKey (hrootkey); | |
335 | } | |
336 | ||
337 | return result; | |
338 | } | |
339 | ||
340 | /* | |
341 | getenv wrapper for Windows | |
342 | ||
343 | This is needed to duplicate Emacs's behavior, which is to look for enviroment | |
344 | variables in the registry if they don't appear in the environment. | |
345 | */ | |
346 | char * | |
347 | w32_getenv (envvar) | |
348 | char *envvar; | |
349 | { | |
350 | char *value; | |
351 | DWORD dwType; | |
352 | ||
353 | if (value = getenv (envvar)) | |
354 | /* Found in the environment. */ | |
355 | return value; | |
356 | ||
357 | if (! (value = w32_get_resource (HKEY_CURRENT_USER, envvar, &dwType)) && | |
358 | ! (value = w32_get_resource (HKEY_LOCAL_MACHINE, envvar, &dwType))) | |
d41784ee EZ |
359 | { |
360 | /* "w32console" is what Emacs on Windows uses for tty-type under -nw. */ | |
361 | if (strcmp (envvar, "TERM") == 0) | |
362 | return xstrdup ("w32console"); | |
363 | /* Found neither in the environment nor in the registry. */ | |
364 | return NULL; | |
365 | } | |
7ce8671d JB |
366 | |
367 | if (dwType == REG_SZ) | |
368 | /* Registry; no need to expand. */ | |
369 | return value; | |
370 | ||
371 | if (dwType == REG_EXPAND_SZ) | |
372 | { | |
373 | DWORD size; | |
374 | ||
375 | if (size = ExpandEnvironmentStrings (value, NULL, 0)) | |
376 | { | |
377 | char *buffer = (char *) xmalloc (size); | |
378 | if (ExpandEnvironmentStrings (value, buffer, size)) | |
379 | { | |
380 | /* Found and expanded. */ | |
381 | free (value); | |
382 | return buffer; | |
383 | } | |
384 | ||
385 | /* Error expanding. */ | |
386 | free (buffer); | |
387 | } | |
388 | } | |
389 | ||
390 | /* Not the right type, or not correctly expanded. */ | |
391 | free (value); | |
392 | return NULL; | |
393 | } | |
394 | ||
42073bfb | 395 | int |
f0384499 | 396 | w32_window_app () |
42073bfb JB |
397 | { |
398 | static int window_app = -1; | |
399 | char szTitle[MAX_PATH]; | |
400 | ||
401 | if (window_app < 0) | |
dbf60b07 JR |
402 | { |
403 | /* Checking for STDOUT does not work; it's a valid handle also in | |
404 | nonconsole apps. Testing for the console title seems to work. */ | |
405 | window_app = (GetConsoleTitleA (szTitle, MAX_PATH) == 0); | |
406 | if (window_app) | |
407 | InitCommonControls(); | |
408 | } | |
42073bfb JB |
409 | |
410 | return window_app; | |
411 | } | |
105faa84 DN |
412 | |
413 | /* | |
cb06b8dc | 414 | execvp wrapper for Windows. Quotes arguments with embedded spaces. |
105faa84 DN |
415 | |
416 | This is necessary due to the broken implementation of exec* routines in | |
417 | the Microsoft libraries: they concatenate the arguments together without | |
418 | quoting special characters, and pass the result to CreateProcess, with | |
419 | predictably bad results. By contrast, Posix execvp passes the arguments | |
420 | directly into the argv array of the child process. | |
421 | */ | |
422 | int | |
423 | w32_execvp (path, argv) | |
424 | char *path; | |
425 | char **argv; | |
426 | { | |
427 | int i; | |
428 | ||
429 | /* Required to allow a .BAT script as alternate editor. */ | |
430 | argv[0] = (char *) alternate_editor; | |
431 | ||
432 | for (i = 0; argv[i]; i++) | |
433 | if (strchr (argv[i], ' ')) | |
434 | { | |
435 | char *quoted = alloca (strlen (argv[i]) + 3); | |
436 | sprintf (quoted, "\"%s\"", argv[i]); | |
437 | argv[i] = quoted; | |
438 | } | |
439 | ||
440 | return execvp (path, argv); | |
441 | } | |
442 | ||
443 | #undef execvp | |
444 | #define execvp w32_execvp | |
445 | ||
d41784ee EZ |
446 | /* Emulation of ttyname for Windows. */ |
447 | char * | |
448 | ttyname (int fd) | |
449 | { | |
450 | return "CONOUT$"; | |
451 | } | |
452 | ||
105faa84 | 453 | #endif /* WINDOWSNT */ |
42073bfb | 454 | |
f387c1ee JB |
455 | /* Display a normal or error message. |
456 | On Windows, use a message box if compiled as a Windows app. */ | |
42073bfb JB |
457 | void |
458 | message (int is_error, char *message, ...) | |
459 | { | |
c66648e0 | 460 | char msg [2048]; |
42073bfb JB |
461 | va_list args; |
462 | ||
463 | va_start (args, message); | |
42073bfb JB |
464 | vsprintf (msg, message, args); |
465 | va_end (args); | |
466 | ||
467 | #ifdef WINDOWSNT | |
468 | if (w32_window_app ()) | |
469 | { | |
470 | if (is_error) | |
471 | MessageBox (NULL, msg, "Emacsclient ERROR", MB_ICONERROR); | |
472 | else | |
473 | MessageBox (NULL, msg, "Emacsclient", MB_ICONINFORMATION); | |
474 | } | |
475 | else | |
476 | #endif | |
9219db75 JB |
477 | { |
478 | FILE *f = is_error ? stderr : stdout; | |
479 | ||
480 | fputs (msg, f); | |
481 | fflush (f); | |
482 | } | |
42073bfb JB |
483 | } |
484 | ||
8f9aaa0a | 485 | /* Decode the options from argv and argc. |
5212210c | 486 | The global variable `optind' will say how many arguments we used up. */ |
8f9aaa0a | 487 | |
5212210c | 488 | void |
8f9aaa0a RS |
489 | decode_options (argc, argv) |
490 | int argc; | |
491 | char **argv; | |
492 | { | |
7ce8671d | 493 | alternate_editor = egetenv ("ALTERNATE_EDITOR"); |
0ea5797a | 494 | |
8f9aaa0a RS |
495 | while (1) |
496 | { | |
dc1cd5f7 | 497 | int opt = getopt_long_only (argc, argv, |
b03d27bd | 498 | #ifndef NO_SOCKETS_IN_FILE_SYSTEM |
974b73e8 | 499 | "VHnea:s:f:d:tc", |
b03d27bd | 500 | #else |
974b73e8 | 501 | "VHnea:f:d:tc", |
b03d27bd | 502 | #endif |
974b73e8 | 503 | longopts, 0); |
8f9aaa0a RS |
504 | |
505 | if (opt == EOF) | |
506 | break; | |
507 | ||
508 | switch (opt) | |
509 | { | |
510 | case 0: | |
511 | /* If getopt returns 0, then it has already processed a | |
512 | long-named option. We should do nothing. */ | |
513 | break; | |
e69233c2 | 514 | |
97e3214d GM |
515 | case 'a': |
516 | alternate_editor = optarg; | |
517 | break; | |
e69233c2 | 518 | |
b03d27bd | 519 | #ifndef NO_SOCKETS_IN_FILE_SYSTEM |
254107e4 RS |
520 | case 's': |
521 | socket_name = optarg; | |
522 | break; | |
b03d27bd | 523 | #endif |
254107e4 | 524 | |
aa0b6932 JB |
525 | case 'f': |
526 | server_file = optarg; | |
527 | break; | |
254107e4 | 528 | |
0ea5797a SM |
529 | /* We used to disallow this argument in w32, but it seems better |
530 | to allow it, for the occasional case where the user is | |
531 | connecting with a w32 client to a server compiled with X11 | |
532 | support. */ | |
30be2360 SM |
533 | case 'd': |
534 | display = optarg; | |
535 | break; | |
536 | ||
8f9aaa0a RS |
537 | case 'n': |
538 | nowait = 1; | |
539 | break; | |
540 | ||
30be2360 SM |
541 | case 'e': |
542 | eval = 1; | |
543 | break; | |
544 | ||
8f9aaa0a | 545 | case 'V': |
42073bfb | 546 | message (FALSE, "emacsclient %s\n", VERSION); |
65396510 | 547 | exit (EXIT_SUCCESS); |
8f9aaa0a | 548 | break; |
46cec291 | 549 | |
819b8f00 | 550 | case 't': |
77134727 | 551 | tty = 1; |
c1b8e896 | 552 | current_frame = 0; |
77134727 KL |
553 | break; |
554 | ||
e5299d8d | 555 | case 'c': |
31fa6595 | 556 | current_frame = 0; |
9628b887 | 557 | break; |
0b0d3e0b | 558 | |
8f9aaa0a | 559 | case 'H': |
8f9aaa0a | 560 | print_help_and_exit (); |
20c396e8 JB |
561 | break; |
562 | ||
563 | default: | |
42073bfb | 564 | message (TRUE, "Try `%s --help' for more information\n", progname); |
65396510 | 565 | exit (EXIT_FAILURE); |
20c396e8 | 566 | break; |
8f9aaa0a RS |
567 | } |
568 | } | |
9628b887 | 569 | |
273b9028 CY |
570 | /* If the -c option is used (without -t) and no --display argument |
571 | is provided, try $DISPLAY. | |
572 | Without the -c option, we used to set `display' to $DISPLAY by | |
573 | default, but this changed the default behavior and is sometimes | |
574 | inconvenient. So we force users to use "--display $DISPLAY" if | |
575 | they want Emacs to connect to their current display. */ | |
09317bf4 | 576 | if (!current_frame && !tty && !display) |
e7534fc4 AR |
577 | { |
578 | display = egetenv ("DISPLAY"); | |
579 | #ifdef NS_IMPL_COCOA | |
580 | /* Under Cocoa, we don't really use displays the same way as in X, | |
581 | so provide a dummy. */ | |
582 | if (!display || strlen (display) == 0) | |
583 | display = "ns"; | |
584 | #endif | |
585 | } | |
9997dc15 | 586 | |
273b9028 | 587 | /* A null-string display is invalid. */ |
0ea5797a SM |
588 | if (display && strlen (display) == 0) |
589 | display = NULL; | |
590 | ||
273b9028 CY |
591 | /* If no display is available, new frames are tty frames. */ |
592 | if (!current_frame && !display) | |
92071250 | 593 | tty = 1; |
c0f342ab | 594 | |
b8ccaf6f | 595 | /* --no-wait implies --current-frame on ttys when there are file |
273b9028 | 596 | arguments or expressions given. */ |
b8ccaf6f | 597 | if (nowait && tty && argc - optind > 0) |
92071250 | 598 | current_frame = 1; |
802bdb3c DN |
599 | |
600 | #ifdef WINDOWSNT | |
69157c99 | 601 | if (alternate_editor && alternate_editor[0] == '\0') |
802bdb3c DN |
602 | { |
603 | message (TRUE, "--alternate-editor argument or ALTERNATE_EDITOR variable cannot be\n\ | |
604 | an empty string"); | |
605 | exit (EXIT_FAILURE); | |
606 | } | |
607 | #endif /* WINDOWSNT */ | |
8f9aaa0a RS |
608 | } |
609 | ||
974b73e8 | 610 | \f |
7f3bff3e | 611 | void |
8f9aaa0a RS |
612 | print_help_and_exit () |
613 | { | |
c0f342ab JB |
614 | /* Spaces and tabs are significant in this message; they're chosen so the |
615 | message aligns properly both in a tty and in a Windows message box. | |
616 | Please try to preserve them; otherwise the output is very hard to read | |
617 | when using emacsclientw. */ | |
42073bfb | 618 | message (FALSE, |
974b73e8 | 619 | "Usage: %s [OPTIONS] FILE...\n\ |
30be2360 SM |
620 | Tell the Emacs server to visit the specified files.\n\ |
621 | Every FILE can be either just a FILENAME or [+LINE[:COLUMN]] FILENAME.\n\ | |
20c396e8 | 622 | \n\ |
30be2360 | 623 | The following OPTIONS are accepted:\n\ |
c0f342ab JB |
624 | -V, --version Just print version info and return\n\ |
625 | -H, --help Print this usage information message\n\ | |
dc1cd5f7 | 626 | -nw, -t, --tty Open a new Emacs frame on the current terminal\n\ |
c4b858e3 | 627 | -c, --create-frame Create a new frame instead of trying to\n\ |
c0f342ab JB |
628 | use the current Emacs frame\n\ |
629 | -e, --eval Evaluate the FILE arguments as ELisp expressions\n\ | |
d07529f3 JB |
630 | -n, --no-wait Don't wait for the server to return\n\ |
631 | -d, --display=DISPLAY Visit the file in the given display\n" | |
aa0b6932 JB |
632 | #ifndef NO_SOCKETS_IN_FILE_SYSTEM |
633 | "-s, --socket-name=FILENAME\n\ | |
c0f342ab | 634 | Set filename of the UNIX socket for communication\n" |
aa0b6932 JB |
635 | #endif |
636 | "-f, --server-file=FILENAME\n\ | |
c0f342ab | 637 | Set filename of the TCP authentication file\n\ |
30be2360 | 638 | -a, --alternate-editor=EDITOR\n\ |
c3f995a2 | 639 | Editor to fallback to if the server is not running\n" |
802bdb3c | 640 | #ifdef WINDOWSNT |
c3f995a2 JB |
641 | " If EDITOR is the empty string, start Emacs in daemon\n\ |
642 | mode and try connecting again\n" | |
802bdb3c | 643 | #endif /* WINDOWSNT */ |
c3f995a2 | 644 | "\n\ |
30be2360 | 645 | Report bugs to bug-gnu-emacs@gnu.org.\n", progname); |
65396510 | 646 | exit (EXIT_SUCCESS); |
8f9aaa0a | 647 | } |
5212210c | 648 | |
aa0b6932 JB |
649 | /* |
650 | Try to run a different command, or --if no alternate editor is | |
651 | defined-- exit with an errorcode. | |
cb06b8dc | 652 | Uses argv, but gets it from the global variable main_argv. |
aa0b6932 JB |
653 | */ |
654 | void | |
974b73e8 | 655 | fail (void) |
9002956f | 656 | { |
aa0b6932 | 657 | if (alternate_editor) |
9002956f | 658 | { |
aa0b6932 | 659 | int i = optind - 1; |
4472aef4 | 660 | |
974b73e8 | 661 | execvp (alternate_editor, main_argv + i); |
42073bfb | 662 | message (TRUE, "%s: error executing alternate editor \"%s\"\n", |
974b73e8 | 663 | progname, alternate_editor); |
9002956f | 664 | } |
aa0b6932 | 665 | exit (EXIT_FAILURE); |
9002956f KL |
666 | } |
667 | ||
aa0b6932 | 668 | \f |
1e7823d0 | 669 | #if !defined (HAVE_SOCKETS) || !defined (HAVE_INET_SOCKETS) |
9002956f | 670 | |
aa0b6932 JB |
671 | int |
672 | main (argc, argv) | |
673 | int argc; | |
674 | char **argv; | |
9002956f | 675 | { |
974b73e8 KL |
676 | main_argv = argv; |
677 | progname = argv[0]; | |
678 | message (TRUE, "%s: Sorry, the Emacs server is supported only\n" | |
c0f342ab | 679 | "on systems with Berkeley sockets.\n", |
aa0b6932 | 680 | argv[0]); |
974b73e8 | 681 | fail (); |
9002956f KL |
682 | } |
683 | ||
1e7823d0 | 684 | #else /* HAVE_SOCKETS && HAVE_INET_SOCKETS */ |
2828d5f9 | 685 | |
aa0b6932 JB |
686 | #ifdef WINDOWSNT |
687 | # include <winsock2.h> | |
2828d5f9 | 688 | #else |
aa0b6932 JB |
689 | # include <sys/types.h> |
690 | # include <sys/socket.h> | |
691 | # include <sys/un.h> | |
aa0b6932 JB |
692 | #endif |
693 | ||
694 | #define AUTH_KEY_LENGTH 64 | |
695 | #define SEND_BUFFER_SIZE 4096 | |
696 | ||
697 | extern char *strerror (); | |
698 | extern int errno; | |
699 | ||
700 | /* Buffer to accumulate data to send in TCP connections. */ | |
701 | char send_buffer[SEND_BUFFER_SIZE + 1]; | |
702 | int sblen = 0; /* Fill pointer for the send buffer. */ | |
4b7b77f6 JR |
703 | /* Socket used to communicate with the Emacs server process. */ |
704 | HSOCKET emacs_socket = 0; | |
aa0b6932 | 705 | |
d22b00e5 JR |
706 | /* On Windows, the socket library was historically separate from the standard |
707 | C library, so errors are handled differently. */ | |
708 | void | |
709 | sock_err_message (function_name) | |
710 | char *function_name; | |
711 | { | |
712 | #ifdef WINDOWSNT | |
713 | char* msg = NULL; | |
714 | ||
715 | FormatMessage (FORMAT_MESSAGE_FROM_SYSTEM | |
716 | | FORMAT_MESSAGE_ALLOCATE_BUFFER | |
717 | | FORMAT_MESSAGE_ARGUMENT_ARRAY, | |
718 | NULL, WSAGetLastError (), 0, (LPTSTR)&msg, 0, NULL); | |
719 | ||
720 | message (TRUE, "%s: %s: %s\n", progname, function_name, msg); | |
721 | ||
722 | LocalFree (msg); | |
723 | #else | |
724 | message (TRUE, "%s: %s: %s\n", progname, function_name, strerror (errno)); | |
725 | #endif | |
726 | } | |
727 | ||
728 | ||
aa0b6932 JB |
729 | /* Let's send the data to Emacs when either |
730 | - the data ends in "\n", or | |
731 | - the buffer is full (but this shouldn't happen) | |
732 | Otherwise, we just accumulate it. */ | |
b03d27bd JB |
733 | void |
734 | send_to_emacs (s, data) | |
aa0b6932 JB |
735 | HSOCKET s; |
736 | char *data; | |
737 | { | |
738 | while (data) | |
2828d5f9 | 739 | { |
aa0b6932 JB |
740 | int dlen = strlen (data); |
741 | if (dlen + sblen >= SEND_BUFFER_SIZE) | |
742 | { | |
743 | int part = SEND_BUFFER_SIZE - sblen; | |
744 | strncpy (&send_buffer[sblen], data, part); | |
745 | data += part; | |
746 | sblen = SEND_BUFFER_SIZE; | |
747 | } | |
748 | else if (dlen) | |
749 | { | |
750 | strcpy (&send_buffer[sblen], data); | |
751 | data = NULL; | |
752 | sblen += dlen; | |
753 | } | |
754 | else | |
755 | break; | |
756 | ||
757 | if (sblen == SEND_BUFFER_SIZE | |
758 | || (sblen > 0 && send_buffer[sblen-1] == '\n')) | |
759 | { | |
760 | int sent = send (s, send_buffer, sblen, 0); | |
761 | if (sent != sblen) | |
762 | strcpy (send_buffer, &send_buffer[sent]); | |
763 | sblen -= sent; | |
764 | } | |
2828d5f9 | 765 | } |
2828d5f9 | 766 | } |
2828d5f9 KL |
767 | |
768 | \f | |
0b0d3e0b | 769 | /* In STR, insert a & before each &, each space, each newline, and |
a4cf2096 | 770 | any initial -. Change spaces to underscores, too, so that the |
0b0d3e0b KL |
771 | return value never contains a space. |
772 | ||
773 | Does not change the string. Outputs the result to STREAM. */ | |
87209357 | 774 | void |
974b73e8 | 775 | quote_argument (s, str) |
aa0b6932 | 776 | HSOCKET s; |
0b0d3e0b | 777 | char *str; |
5212210c | 778 | { |
9002956f | 779 | char *copy = (char *) xmalloc (strlen (str) * 2 + 1); |
5212210c RS |
780 | char *p, *q; |
781 | ||
0b0d3e0b | 782 | p = str; |
5212210c RS |
783 | q = copy; |
784 | while (*p) | |
785 | { | |
786 | if (*p == ' ') | |
787 | { | |
f1db6a73 | 788 | *q++ = '&'; |
5212210c RS |
789 | *q++ = '_'; |
790 | p++; | |
791 | } | |
3cf8c6aa SM |
792 | else if (*p == '\n') |
793 | { | |
794 | *q++ = '&'; | |
795 | *q++ = 'n'; | |
796 | p++; | |
797 | } | |
5212210c RS |
798 | else |
799 | { | |
0b0d3e0b | 800 | if (*p == '&' || (*p == '-' && p == str)) |
f1db6a73 | 801 | *q++ = '&'; |
5212210c RS |
802 | *q++ = *p++; |
803 | } | |
804 | } | |
f1db6a73 | 805 | *q++ = 0; |
5212210c | 806 | |
486ba65f | 807 | send_to_emacs (s, copy); |
87209357 EZ |
808 | |
809 | free (copy); | |
5212210c | 810 | } |
0c76956f | 811 | |
0b0d3e0b KL |
812 | |
813 | /* The inverse of quote_argument. Removes quoting in string STR by | |
814 | modifying the string in place. Returns STR. */ | |
815 | ||
816 | char * | |
817 | unquote_argument (str) | |
818 | char *str; | |
819 | { | |
820 | char *p, *q; | |
821 | ||
822 | if (! str) | |
823 | return str; | |
824 | ||
825 | p = str; | |
826 | q = str; | |
827 | while (*p) | |
828 | { | |
829 | if (*p == '&') | |
830 | { | |
831 | p++; | |
832 | if (*p == '&') | |
833 | *p = '&'; | |
834 | else if (*p == '_') | |
835 | *p = ' '; | |
836 | else if (*p == 'n') | |
837 | *p = '\n'; | |
838 | else if (*p == '-') | |
839 | *p = '-'; | |
840 | } | |
841 | *q++ = *p++; | |
842 | } | |
843 | *q = 0; | |
844 | return str; | |
845 | } | |
846 | ||
8f9aaa0a | 847 | \f |
b03d27bd JB |
848 | int |
849 | file_name_absolute_p (filename) | |
850 | const unsigned char *filename; | |
851 | { | |
852 | /* Sanity check, it shouldn't happen. */ | |
853 | if (! filename) return FALSE; | |
854 | ||
855 | /* /xxx is always an absolute path. */ | |
856 | if (filename[0] == '/') return TRUE; | |
857 | ||
858 | /* Empty filenames (which shouldn't happen) are relative. */ | |
859 | if (filename[0] == '\0') return FALSE; | |
860 | ||
861 | #ifdef WINDOWSNT | |
71b8f735 | 862 | /* X:\xxx is always absolute. */ |
5f7a4874 | 863 | if (isalpha (filename[0]) |
cb0297bb | 864 | && filename[1] == ':' && (filename[2] == '\\' || filename[2] == '/')) |
b03d27bd JB |
865 | return TRUE; |
866 | ||
867 | /* Both \xxx and \\xxx\yyy are absolute. */ | |
868 | if (filename[0] == '\\') return TRUE; | |
869 | #endif | |
870 | ||
871 | return FALSE; | |
872 | } | |
873 | ||
aa0b6932 | 874 | #ifdef WINDOWSNT |
f0384499 | 875 | /* Wrapper to make WSACleanup a cdecl, as required by atexit. */ |
b03d27bd JB |
876 | void |
877 | __cdecl close_winsock () | |
aa0b6932 JB |
878 | { |
879 | WSACleanup (); | |
880 | } | |
0c76956f | 881 | |
b03d27bd JB |
882 | /* Initialize the WinSock2 library. */ |
883 | void | |
884 | initialize_sockets () | |
0c76956f | 885 | { |
aa0b6932 JB |
886 | WSADATA wsaData; |
887 | ||
aa0b6932 JB |
888 | if (WSAStartup (MAKEWORD (2, 0), &wsaData)) |
889 | { | |
78da39c6 | 890 | message (TRUE, "%s: error initializing WinSock2\n", progname); |
aa0b6932 JB |
891 | exit (EXIT_FAILURE); |
892 | } | |
893 | ||
894 | atexit (close_winsock); | |
0c76956f | 895 | } |
e35fc962 | 896 | #endif /* WINDOWSNT */ |
974b73e8 | 897 | |
8f9aaa0a | 898 | \f |
97e3214d | 899 | /* |
aa0b6932 | 900 | * Read the information needed to set up a TCP comm channel with |
434a6c5d | 901 | * the Emacs server: host, port, pid and authentication string. |
0e0dced5 | 902 | */ |
b03d27bd JB |
903 | int |
904 | get_server_config (server, authentication) | |
aa0b6932 JB |
905 | struct sockaddr_in *server; |
906 | char *authentication; | |
97e3214d | 907 | { |
aa0b6932 JB |
908 | char dotted[32]; |
909 | char *port; | |
434a6c5d | 910 | char *pid; |
b03d27bd | 911 | FILE *config = NULL; |
aa0b6932 | 912 | |
b03d27bd JB |
913 | if (file_name_absolute_p (server_file)) |
914 | config = fopen (server_file, "rb"); | |
915 | else | |
97e3214d | 916 | { |
7ce8671d | 917 | char *home = egetenv ("HOME"); |
88b46d84 | 918 | |
aa0b6932 JB |
919 | if (home) |
920 | { | |
bc558f3e JB |
921 | char *path = alloca (strlen (home) + strlen (server_file) |
922 | + EXTRA_SPACE); | |
aa0b6932 JB |
923 | sprintf (path, "%s/.emacs.d/server/%s", home, server_file); |
924 | config = fopen (path, "rb"); | |
925 | } | |
88b46d84 | 926 | #ifdef WINDOWSNT |
7ce8671d | 927 | if (!config && (home = egetenv ("APPDATA"))) |
88b46d84 | 928 | { |
bc558f3e JB |
929 | char *path = alloca (strlen (home) + strlen (server_file) |
930 | + EXTRA_SPACE); | |
88b46d84 JB |
931 | sprintf (path, "%s/.emacs.d/server/%s", home, server_file); |
932 | config = fopen (path, "rb"); | |
933 | } | |
934 | #endif | |
aa0b6932 JB |
935 | } |
936 | ||
937 | if (! config) | |
938 | return FALSE; | |
939 | ||
940 | if (fgets (dotted, sizeof dotted, config) | |
434a6c5d JB |
941 | && (port = strchr (dotted, ':')) |
942 | && (pid = strchr (port, ' '))) | |
aa0b6932 JB |
943 | { |
944 | *port++ = '\0'; | |
434a6c5d | 945 | *pid++ = '\0'; |
97e3214d GM |
946 | } |
947 | else | |
948 | { | |
78da39c6 | 949 | message (TRUE, "%s: invalid configuration info\n", progname); |
65396510 | 950 | exit (EXIT_FAILURE); |
97e3214d | 951 | } |
97e3214d | 952 | |
aa0b6932 JB |
953 | server->sin_family = AF_INET; |
954 | server->sin_addr.s_addr = inet_addr (dotted); | |
955 | server->sin_port = htons (atoi (port)); | |
97e3214d | 956 | |
aa0b6932 JB |
957 | if (! fread (authentication, AUTH_KEY_LENGTH, 1, config)) |
958 | { | |
78da39c6 | 959 | message (TRUE, "%s: cannot read authentication info\n", progname); |
aa0b6932 JB |
960 | exit (EXIT_FAILURE); |
961 | } | |
46cec291 | 962 | |
aa0b6932 | 963 | fclose (config); |
97e3214d | 964 | |
c66648e0 | 965 | emacs_pid = atoi (pid); |
434a6c5d | 966 | |
aa0b6932 | 967 | return TRUE; |
97e3214d GM |
968 | } |
969 | ||
aa0b6932 JB |
970 | HSOCKET |
971 | set_tcp_socket () | |
972 | { | |
973 | HSOCKET s; | |
974 | struct sockaddr_in server; | |
aa0b6932 JB |
975 | struct linger l_arg = {1, 1}; |
976 | char auth_string[AUTH_KEY_LENGTH + 1]; | |
9628b887 | 977 | |
aa0b6932 JB |
978 | if (! get_server_config (&server, auth_string)) |
979 | return INVALID_SOCKET; | |
980 | ||
b03d27bd | 981 | if (server.sin_addr.s_addr != inet_addr ("127.0.0.1")) |
9219db75 | 982 | message (FALSE, "%s: connected to remote socket at %s\n", |
b03d27bd JB |
983 | progname, inet_ntoa (server.sin_addr)); |
984 | ||
aa0b6932 JB |
985 | /* |
986 | * Open up an AF_INET socket | |
987 | */ | |
988 | if ((s = socket (AF_INET, SOCK_STREAM, IPPROTO_TCP)) < 0) | |
989 | { | |
d22b00e5 | 990 | sock_err_message ("socket"); |
aa0b6932 JB |
991 | return INVALID_SOCKET; |
992 | } | |
993 | ||
994 | /* | |
995 | * Set up the socket | |
996 | */ | |
997 | if (connect (s, (struct sockaddr *) &server, sizeof server) < 0) | |
998 | { | |
d22b00e5 | 999 | sock_err_message ("connect"); |
aa0b6932 JB |
1000 | return INVALID_SOCKET; |
1001 | } | |
1002 | ||
aa0b6932 JB |
1003 | setsockopt (s, SOL_SOCKET, SO_LINGER, (char *) &l_arg, sizeof l_arg); |
1004 | ||
1005 | /* | |
1006 | * Send the authentication | |
1007 | */ | |
1008 | auth_string[AUTH_KEY_LENGTH] = '\0'; | |
1009 | ||
486ba65f JR |
1010 | send_to_emacs (s, "-auth "); |
1011 | send_to_emacs (s, auth_string); | |
5ab73228 | 1012 | send_to_emacs (s, " "); |
aa0b6932 JB |
1013 | |
1014 | return s; | |
1015 | } | |
1016 | ||
b2ff54a0 JR |
1017 | |
1018 | /* Returns 1 if PREFIX is a prefix of STRING. */ | |
1019 | static int | |
1020 | strprefix (char *prefix, char *string) | |
1021 | { | |
cb06b8dc | 1022 | return !strncmp (prefix, string, strlen (prefix)); |
b2ff54a0 JR |
1023 | } |
1024 | ||
a336ee5b CY |
1025 | /* Get tty name and type. If successful, return the type in TTY_TYPE |
1026 | and the name in TTY_NAME, and return 1. Otherwise, fail if NOABORT | |
1027 | is zero, or return 0 if NOABORT is non-zero. */ | |
1028 | ||
1029 | int | |
1030 | find_tty (char **tty_type, char **tty_name, int noabort) | |
1031 | { | |
1032 | char *type = egetenv ("TERM"); | |
1033 | char *name = ttyname (fileno (stdout)); | |
1034 | ||
1035 | if (!name) | |
1036 | { | |
1037 | if (noabort) | |
1038 | return 0; | |
1039 | else | |
1040 | { | |
1041 | message (TRUE, "%s: could not get terminal name\n", progname); | |
1042 | fail (); | |
1043 | } | |
1044 | } | |
1045 | ||
1046 | if (!type) | |
1047 | { | |
1048 | if (noabort) | |
1049 | return 0; | |
1050 | else | |
1051 | { | |
1052 | message (TRUE, "%s: please set the TERM variable to your terminal type\n", | |
1053 | progname); | |
1054 | fail (); | |
1055 | } | |
1056 | } | |
1057 | ||
1058 | if (strcmp (type, "eterm") == 0) | |
1059 | { | |
1060 | if (noabort) | |
1061 | return 0; | |
1062 | else | |
1063 | { | |
1064 | /* This causes nasty, MULTI_KBOARD-related input lockouts. */ | |
1065 | message (TRUE, "%s: opening a frame in an Emacs term buffer" | |
1066 | " is not supported\n", progname); | |
1067 | fail (); | |
1068 | } | |
1069 | } | |
1070 | ||
1071 | *tty_name = name; | |
1072 | *tty_type = type; | |
1073 | return 1; | |
1074 | } | |
1075 | ||
b2ff54a0 | 1076 | |
aa0b6932 | 1077 | #if !defined (NO_SOCKETS_IN_FILE_SYSTEM) |
46cec291 | 1078 | |
9f637eea GM |
1079 | /* Three possibilities: |
1080 | 2 - can't be `stat'ed (sets errno) | |
1081 | 1 - isn't owned by us | |
1082 | 0 - success: none of the above */ | |
1083 | ||
1084 | static int | |
1085 | socket_status (socket_name) | |
1086 | char *socket_name; | |
1087 | { | |
1088 | struct stat statbfr; | |
1089 | ||
1090 | if (stat (socket_name, &statbfr) == -1) | |
1091 | return 2; | |
1092 | ||
1093 | if (statbfr.st_uid != geteuid ()) | |
1094 | return 1; | |
0b0d3e0b | 1095 | |
9f637eea GM |
1096 | return 0; |
1097 | } | |
1098 | ||
974b73e8 | 1099 | \f |
da8e1115 KL |
1100 | /* A signal handler that passes the signal to the Emacs process. |
1101 | Useful for SIGWINCH. */ | |
1102 | ||
9628b887 | 1103 | SIGTYPE |
428a555e | 1104 | pass_signal_to_emacs (int signalnum) |
9628b887 KL |
1105 | { |
1106 | int old_errno = errno; | |
1107 | ||
9f729af5 | 1108 | if (emacs_pid) |
428a555e | 1109 | kill (emacs_pid, signalnum); |
9f729af5 | 1110 | |
428a555e | 1111 | signal (signalnum, pass_signal_to_emacs); |
9f729af5 KL |
1112 | errno = old_errno; |
1113 | } | |
1114 | ||
0b0d3e0b KL |
1115 | /* Signal handler for SIGCONT; notify the Emacs process that it can |
1116 | now resume our tty frame. */ | |
1117 | ||
1118 | SIGTYPE | |
1119 | handle_sigcont (int signalnum) | |
1120 | { | |
1121 | int old_errno = errno; | |
1122 | ||
1123 | if (tcgetpgrp (1) == getpgrp ()) | |
1124 | { | |
1125 | /* We are in the foreground. */ | |
486ba65f | 1126 | send_to_emacs (emacs_socket, "-resume \n"); |
0b0d3e0b KL |
1127 | } |
1128 | else | |
1129 | { | |
1130 | /* We are in the background; cancel the continue. */ | |
1131 | kill (getpid (), SIGSTOP); | |
1132 | } | |
c6c53c3e KL |
1133 | |
1134 | signal (signalnum, handle_sigcont); | |
0b0d3e0b KL |
1135 | errno = old_errno; |
1136 | } | |
1137 | ||
1138 | /* Signal handler for SIGTSTP; notify the Emacs process that we are | |
1139 | going to sleep. Normally the suspend is initiated by Emacs via | |
1140 | server-handle-suspend-tty, but if the server gets out of sync with | |
1141 | reality, we may get a SIGTSTP on C-z. Handling this signal and | |
1142 | notifying Emacs about it should get things under control again. */ | |
1143 | ||
1144 | SIGTYPE | |
1145 | handle_sigtstp (int signalnum) | |
1146 | { | |
1147 | int old_errno = errno; | |
1148 | sigset_t set; | |
c0f342ab | 1149 | |
90843190 | 1150 | if (emacs_socket) |
486ba65f | 1151 | send_to_emacs (emacs_socket, "-suspend \n"); |
0b0d3e0b | 1152 | |
5ab73228 | 1153 | /* Unblock this signal and call the default handler by temporarily |
0b0d3e0b KL |
1154 | changing the handler and resignalling. */ |
1155 | sigprocmask (SIG_BLOCK, NULL, &set); | |
1156 | sigdelset (&set, signalnum); | |
1157 | signal (signalnum, SIG_DFL); | |
1158 | kill (getpid (), signalnum); | |
1159 | sigprocmask (SIG_SETMASK, &set, NULL); /* Let's the above signal through. */ | |
1160 | signal (signalnum, handle_sigtstp); | |
1161 | ||
1162 | errno = old_errno; | |
1163 | } | |
273b9028 CY |
1164 | |
1165 | ||
da8e1115 | 1166 | /* Set up signal handlers before opening a frame on the current tty. */ |
0b0d3e0b | 1167 | |
4d553a13 KL |
1168 | void |
1169 | init_signals (void) | |
9628b887 KL |
1170 | { |
1171 | /* Set up signal handlers. */ | |
428a555e | 1172 | signal (SIGWINCH, pass_signal_to_emacs); |
4ca927b4 KL |
1173 | |
1174 | /* Don't pass SIGINT and SIGQUIT to Emacs, because it has no way of | |
1175 | deciding which terminal the signal came from. C-g is now a | |
1176 | normal input event on secondary terminals. */ | |
1177 | #if 0 | |
428a555e KL |
1178 | signal (SIGINT, pass_signal_to_emacs); |
1179 | signal (SIGQUIT, pass_signal_to_emacs); | |
4ca927b4 | 1180 | #endif |
0b0d3e0b KL |
1181 | |
1182 | signal (SIGCONT, handle_sigcont); | |
1183 | signal (SIGTSTP, handle_sigtstp); | |
1184 | signal (SIGTTOU, handle_sigtstp); | |
9628b887 KL |
1185 | } |
1186 | ||
46cec291 | 1187 | |
aa0b6932 JB |
1188 | HSOCKET |
1189 | set_local_socket () | |
46cec291 | 1190 | { |
aa0b6932 | 1191 | HSOCKET s; |
46cec291 | 1192 | struct sockaddr_un server; |
46cec291 | 1193 | |
e69233c2 | 1194 | /* |
46cec291 RS |
1195 | * Open up an AF_UNIX socket in this person's home directory |
1196 | */ | |
1197 | ||
1198 | if ((s = socket (AF_UNIX, SOCK_STREAM, 0)) < 0) | |
1199 | { | |
42073bfb | 1200 | message (TRUE, "%s: socket: %s\n", progname, strerror (errno)); |
aa0b6932 | 1201 | return INVALID_SOCKET; |
46cec291 | 1202 | } |
e69233c2 | 1203 | |
46cec291 | 1204 | server.sun_family = AF_UNIX; |
c5fee545 | 1205 | |
c5fee545 | 1206 | { |
9f637eea | 1207 | int sock_status = 0; |
5c9659d3 | 1208 | int default_sock = !socket_name; |
b80bf66e | 1209 | int saved_errno = 0; |
0734b0d0 | 1210 | char *server_name = "server"; |
f77b11a0 | 1211 | char *tmpdir; |
0b0d3e0b | 1212 | |
0734b0d0 SM |
1213 | if (socket_name && !index (socket_name, '/') && !index (socket_name, '\\')) |
1214 | { /* socket_name is a file name component. */ | |
d3a6748c KL |
1215 | server_name = socket_name; |
1216 | socket_name = NULL; | |
1217 | default_sock = 1; /* Try both UIDs. */ | |
0734b0d0 | 1218 | } |
efb859b4 | 1219 | |
5c9659d3 | 1220 | if (default_sock) |
254107e4 | 1221 | { |
f77b11a0 JB |
1222 | tmpdir = egetenv ("TMPDIR"); |
1223 | if (!tmpdir) | |
1224 | tmpdir = "/tmp"; | |
bc558f3e JB |
1225 | socket_name = alloca (strlen (tmpdir) + strlen (server_name) |
1226 | + EXTRA_SPACE); | |
f77b11a0 JB |
1227 | sprintf (socket_name, "%s/emacs%d/%s", |
1228 | tmpdir, (int) geteuid (), server_name); | |
254107e4 RS |
1229 | } |
1230 | ||
1231 | if (strlen (socket_name) < sizeof (server.sun_path)) | |
1232 | strcpy (server.sun_path, socket_name); | |
1233 | else | |
819b8f00 | 1234 | { |
78da39c6 | 1235 | message (TRUE, "%s: socket-name %s too long\n", |
974b73e8 | 1236 | progname, socket_name); |
819b8f00 KL |
1237 | fail (); |
1238 | } | |
efb859b4 | 1239 | |
9f637eea GM |
1240 | /* See if the socket exists, and if it's owned by us. */ |
1241 | sock_status = socket_status (server.sun_path); | |
152b6e83 | 1242 | saved_errno = errno; |
5c9659d3 | 1243 | if (sock_status && default_sock) |
efb859b4 | 1244 | { |
9f637eea GM |
1245 | /* Failing that, see if LOGNAME or USER exist and differ from |
1246 | our euid. If so, look for a socket based on the UID | |
1247 | associated with the name. This is reminiscent of the logic | |
1248 | that init_editfns uses to set the global Vuser_full_name. */ | |
e69233c2 | 1249 | |
7ce8671d | 1250 | char *user_name = (char *) egetenv ("LOGNAME"); |
293f9f2a | 1251 | |
9f637eea | 1252 | if (!user_name) |
7ce8671d | 1253 | user_name = (char *) egetenv ("USER"); |
e69233c2 | 1254 | |
9f637eea GM |
1255 | if (user_name) |
1256 | { | |
1257 | struct passwd *pw = getpwnam (user_name); | |
293f9f2a | 1258 | |
9f637eea GM |
1259 | if (pw && (pw->pw_uid != geteuid ())) |
1260 | { | |
1261 | /* We're running under su, apparently. */ | |
bc558f3e JB |
1262 | socket_name = alloca (strlen (tmpdir) + strlen (server_name) |
1263 | + EXTRA_SPACE); | |
f77b11a0 JB |
1264 | sprintf (socket_name, "%s/emacs%d/%s", |
1265 | tmpdir, (int) pw->pw_uid, server_name); | |
5c9659d3 SM |
1266 | |
1267 | if (strlen (socket_name) < sizeof (server.sun_path)) | |
1268 | strcpy (server.sun_path, socket_name); | |
1269 | else | |
1270 | { | |
78da39c6 | 1271 | message (TRUE, "%s: socket-name %s too long\n", |
aa0b6932 | 1272 | progname, socket_name); |
65396510 | 1273 | exit (EXIT_FAILURE); |
5c9659d3 SM |
1274 | } |
1275 | ||
9f637eea | 1276 | sock_status = socket_status (server.sun_path); |
b80bf66e | 1277 | saved_errno = errno; |
9f637eea | 1278 | } |
293f9f2a RS |
1279 | else |
1280 | errno = saved_errno; | |
9f637eea | 1281 | } |
efb859b4 | 1282 | } |
e69233c2 | 1283 | |
aa0b6932 JB |
1284 | switch (sock_status) |
1285 | { | |
1286 | case 1: | |
974b73e8 KL |
1287 | /* There's a socket, but it isn't owned by us. This is OK if |
1288 | we are root. */ | |
1289 | if (0 != geteuid ()) | |
1290 | { | |
1291 | message (TRUE, "%s: Invalid socket owner\n", progname); | |
aa0b6932 | 1292 | return INVALID_SOCKET; |
974b73e8 KL |
1293 | } |
1294 | break; | |
aa0b6932 JB |
1295 | |
1296 | case 2: | |
974b73e8 KL |
1297 | /* `stat' failed */ |
1298 | if (saved_errno == ENOENT) | |
1299 | message (TRUE, | |
1300 | "%s: can't find socket; have you started the server?\n\ | |
45adde32 | 1301 | To start the server in Emacs, type \"M-x server-start\".\n", |
aa0b6932 | 1302 | progname); |
974b73e8 KL |
1303 | else |
1304 | message (TRUE, "%s: can't stat %s: %s\n", | |
aa0b6932 | 1305 | progname, server.sun_path, strerror (saved_errno)); |
974b73e8 | 1306 | return INVALID_SOCKET; |
aa0b6932 | 1307 | } |
efb859b4 | 1308 | } |
46cec291 | 1309 | |
4e23f2ba JB |
1310 | if (connect (s, (struct sockaddr *) &server, strlen (server.sun_path) + 2) |
1311 | < 0) | |
46cec291 | 1312 | { |
42073bfb | 1313 | message (TRUE, "%s: connect: %s\n", progname, strerror (errno)); |
aa0b6932 | 1314 | return INVALID_SOCKET; |
46cec291 | 1315 | } |
23a7488d | 1316 | |
aa0b6932 JB |
1317 | return s; |
1318 | } | |
1319 | #endif /* ! NO_SOCKETS_IN_FILE_SYSTEM */ | |
1320 | ||
1321 | HSOCKET | |
636b507b | 1322 | set_socket (int no_exit_if_error) |
aa0b6932 | 1323 | { |
b03d27bd | 1324 | HSOCKET s; |
c0f342ab | 1325 | |
b03d27bd | 1326 | INITIALIZE (); |
c0f342ab | 1327 | |
aa0b6932 | 1328 | #ifndef NO_SOCKETS_IN_FILE_SYSTEM |
b03d27bd JB |
1329 | /* Explicit --socket-name argument. */ |
1330 | if (socket_name) | |
46cec291 | 1331 | { |
b03d27bd | 1332 | s = set_local_socket (); |
636b507b | 1333 | if ((s != INVALID_SOCKET) || no_exit_if_error) |
974b73e8 | 1334 | return s; |
355a326e | 1335 | message (TRUE, "%s: error accessing socket \"%s\"\n", |
974b73e8 | 1336 | progname, socket_name); |
b03d27bd | 1337 | exit (EXIT_FAILURE); |
46cec291 | 1338 | } |
b03d27bd JB |
1339 | #endif |
1340 | ||
1341 | /* Explicit --server-file arg or EMACS_SERVER_FILE variable. */ | |
1342 | if (!server_file) | |
7ce8671d | 1343 | server_file = egetenv ("EMACS_SERVER_FILE"); |
46cec291 | 1344 | |
b03d27bd | 1345 | if (server_file) |
23a7488d | 1346 | { |
b03d27bd | 1347 | s = set_tcp_socket (); |
636b507b | 1348 | if ((s != INVALID_SOCKET) || no_exit_if_error) |
974b73e8 | 1349 | return s; |
c0f342ab | 1350 | |
78da39c6 | 1351 | message (TRUE, "%s: error accessing server file \"%s\"\n", |
974b73e8 | 1352 | progname, server_file); |
b03d27bd | 1353 | exit (EXIT_FAILURE); |
23a7488d | 1354 | } |
c0f342ab | 1355 | |
b03d27bd JB |
1356 | #ifndef NO_SOCKETS_IN_FILE_SYSTEM |
1357 | /* Implicit local socket. */ | |
1358 | s = set_local_socket (); | |
1359 | if (s != INVALID_SOCKET) | |
1360 | return s; | |
1361 | #endif | |
23a7488d | 1362 | |
b03d27bd JB |
1363 | /* Implicit server file. */ |
1364 | server_file = "server"; | |
1365 | s = set_tcp_socket (); | |
636b507b | 1366 | if ((s != INVALID_SOCKET) || no_exit_if_error) |
b03d27bd JB |
1367 | return s; |
1368 | ||
1369 | /* No implicit or explicit socket, and no alternate editor. */ | |
42073bfb | 1370 | message (TRUE, "%s: No socket or alternate editor. Please use:\n\n" |
b03d27bd JB |
1371 | #ifndef NO_SOCKETS_IN_FILE_SYSTEM |
1372 | "\t--socket-name\n" | |
ee6a193c | 1373 | #endif |
b03d27bd JB |
1374 | "\t--server-file (or environment variable EMACS_SERVER_FILE)\n\ |
1375 | \t--alternate-editor (or environment variable ALTERNATE_EDITOR)\n", | |
1376 | progname); | |
1377 | exit (EXIT_FAILURE); | |
aa0b6932 | 1378 | } |
46cec291 | 1379 | |
0e0dced5 JB |
1380 | #ifdef WINDOWSNT |
1381 | FARPROC set_fg; /* Pointer to AllowSetForegroundWindow. */ | |
1382 | FARPROC get_wc; /* Pointer to RealGetWindowClassA. */ | |
1383 | ||
1384 | BOOL CALLBACK | |
1385 | w32_find_emacs_process (hWnd, lParam) | |
1386 | HWND hWnd; | |
1387 | LPARAM lParam; | |
1388 | { | |
1389 | DWORD pid; | |
1390 | char class[6]; | |
1391 | ||
1392 | /* Reject any window not of class "Emacs". */ | |
1393 | if (! get_wc (hWnd, class, sizeof (class)) | |
1394 | || strcmp (class, "Emacs")) | |
1395 | return TRUE; | |
1396 | ||
1397 | /* We only need the process id, not the thread id. */ | |
1398 | (void) GetWindowThreadProcessId (hWnd, &pid); | |
1399 | ||
1400 | /* Not the one we're looking for. */ | |
1401 | if (pid != (DWORD) emacs_pid) return TRUE; | |
1402 | ||
1403 | /* OK, let's raise it. */ | |
1404 | set_fg (emacs_pid); | |
1405 | ||
1406 | /* Stop enumeration. */ | |
1407 | return FALSE; | |
1408 | } | |
1409 | ||
1410 | /* | |
1411 | * Search for a window of class "Emacs" and owned by a process with | |
1412 | * process id = emacs_pid. If found, allow it to grab the focus. | |
1413 | */ | |
1414 | void | |
1415 | w32_give_focus () | |
1416 | { | |
1417 | HMODULE hUser32; | |
1418 | ||
71b8f735 | 1419 | /* It shouldn't happen when dealing with TCP sockets. */ |
0e0dced5 JB |
1420 | if (!emacs_pid) return; |
1421 | ||
1422 | if (!(hUser32 = LoadLibrary ("user32.dll"))) return; | |
1423 | ||
1424 | /* Modern Windows restrict which processes can set the foreground window. | |
1425 | emacsclient can allow Emacs to grab the focus by calling the function | |
1426 | AllowSetForegroundWindow. Unfortunately, older Windows (W95, W98 and | |
1427 | NT) lack this function, so we have to check its availability. */ | |
1428 | if ((set_fg = GetProcAddress (hUser32, "AllowSetForegroundWindow")) | |
1429 | && (get_wc = GetProcAddress (hUser32, "RealGetWindowClassA"))) | |
1430 | EnumWindows (w32_find_emacs_process, (LPARAM) 0); | |
1431 | ||
1432 | FreeLibrary (hUser32); | |
1433 | } | |
1434 | #endif | |
1435 | ||
636b507b DN |
1436 | /* Start the emacs daemon and try to connect to it. */ |
1437 | ||
1438 | void | |
1439 | start_daemon_and_retry_set_socket (void) | |
1440 | { | |
802bdb3c | 1441 | #ifndef WINDOWSNT |
636b507b DN |
1442 | pid_t dpid; |
1443 | int status; | |
636b507b DN |
1444 | |
1445 | dpid = fork (); | |
1446 | ||
1447 | if (dpid > 0) | |
1448 | { | |
fd95644b DN |
1449 | pid_t w; |
1450 | w = waitpid (dpid, &status, WUNTRACED | WCONTINUED); | |
636b507b | 1451 | |
fd95644b DN |
1452 | if ((w == -1) || !WIFEXITED (status) || WEXITSTATUS(status)) |
1453 | { | |
1454 | message (TRUE, "Error: Could not start the Emacs daemon\n"); | |
1455 | exit (EXIT_FAILURE); | |
1456 | } | |
1457 | ||
1458 | /* Try connecting, the daemon should have started by now. */ | |
1459 | message (TRUE, "Emacs daemon should have started, trying to connect again\n"); | |
636b507b | 1460 | if ((emacs_socket = set_socket (1)) == INVALID_SOCKET) |
fd95644b DN |
1461 | { |
1462 | message (TRUE, "Error: Cannot connect even after starting the Emacs daemon\n"); | |
1463 | exit (EXIT_FAILURE); | |
1464 | } | |
636b507b DN |
1465 | } |
1466 | else if (dpid < 0) | |
1467 | { | |
fd95644b | 1468 | fprintf (stderr, "Error: Cannot fork!\n"); |
636b507b DN |
1469 | exit (1); |
1470 | } | |
1471 | else | |
1472 | { | |
1473 | char *d_argv[] = {"emacs", "--daemon", 0 }; | |
1474 | if (socket_name != NULL) | |
1475 | { | |
1476 | /* Pass --daemon=socket_name as argument. */ | |
1477 | char *deq = "--daemon="; | |
1478 | char *daemon_arg = alloca (strlen (deq) | |
1479 | + strlen (socket_name) + 1); | |
1480 | strcpy (daemon_arg, deq); | |
1481 | strcat (daemon_arg, socket_name); | |
1482 | d_argv[1] = daemon_arg; | |
1483 | } | |
1484 | execvp ("emacs", d_argv); | |
1485 | message (TRUE, "%s: error starting emacs daemon\n", progname); | |
1486 | } | |
802bdb3c | 1487 | #endif /* WINDOWSNT */ |
636b507b DN |
1488 | } |
1489 | ||
aa0b6932 JB |
1490 | int |
1491 | main (argc, argv) | |
1492 | int argc; | |
1493 | char **argv; | |
1494 | { | |
aa0b6932 | 1495 | int i, rl, needlf = 0; |
974b73e8 | 1496 | char *cwd, *str; |
aa0b6932 | 1497 | char string[BUFSIZ+1]; |
802bdb3c | 1498 | int null_socket_name, null_server_file, start_daemon_if_needed; |
aa0b6932 | 1499 | |
974b73e8 | 1500 | main_argv = argv; |
aa0b6932 JB |
1501 | progname = argv[0]; |
1502 | ||
1503 | /* Process options. */ | |
1504 | decode_options (argc, argv); | |
1505 | ||
273b9028 | 1506 | if ((argc - optind < 1) && !eval && current_frame) |
23a7488d | 1507 | { |
974b73e8 KL |
1508 | message (TRUE, "%s: file name or argument required\n" |
1509 | "Try `%s --help' for more information\n", | |
1510 | progname, progname); | |
aa0b6932 | 1511 | exit (EXIT_FAILURE); |
23a7488d RS |
1512 | } |
1513 | ||
636b507b DN |
1514 | /* If alternate_editor is the empty string, start the emacs daemon |
1515 | in case of failure to connect. */ | |
1516 | start_daemon_if_needed = (alternate_editor | |
1517 | && (alternate_editor[0] == '\0')); | |
1518 | if (start_daemon_if_needed) | |
1519 | { | |
1520 | /* set_socket changes the values for socket_name and | |
1521 | server_file, we need to reset them, if they were NULL before | |
1522 | for the second call to set_socket. */ | |
1523 | null_socket_name = (socket_name == NULL); | |
1524 | null_server_file = (server_file == NULL); | |
1525 | } | |
aa0b6932 | 1526 | |
636b507b DN |
1527 | if ((emacs_socket = set_socket (alternate_editor |
1528 | || start_daemon_if_needed)) == INVALID_SOCKET) | |
1529 | if (start_daemon_if_needed) | |
1530 | { | |
1531 | /* Reset socket_name and server_file if they were NULL | |
1532 | before the set_socket call. */ | |
1533 | if (null_socket_name) | |
1534 | socket_name = NULL; | |
1535 | if (null_server_file) | |
1536 | server_file = NULL; | |
1537 | ||
1538 | start_daemon_and_retry_set_socket (); | |
1539 | } | |
1540 | else | |
1541 | fail (); | |
974b73e8 KL |
1542 | |
1543 | cwd = get_current_dir_name (); | |
46cec291 RS |
1544 | if (cwd == 0) |
1545 | { | |
1546 | /* getwd puts message in STRING if it fails. */ | |
974b73e8 KL |
1547 | message (TRUE, "%s: %s\n", progname, |
1548 | "Cannot get current working directory"); | |
819b8f00 | 1549 | fail (); |
46cec291 RS |
1550 | } |
1551 | ||
c66648e0 | 1552 | #ifdef WINDOWSNT |
0e0dced5 | 1553 | w32_give_focus (); |
c66648e0 JB |
1554 | #endif |
1555 | ||
273b9028 | 1556 | /* Send over our environment and current directory. */ |
59e085e0 KL |
1557 | if (!current_frame) |
1558 | { | |
1559 | extern char **environ; | |
1560 | int i; | |
1561 | for (i = 0; environ[i]; i++) | |
1562 | { | |
1563 | char *name = xstrdup (environ[i]); | |
1564 | char *value = strchr (name, '='); | |
486ba65f JR |
1565 | send_to_emacs (emacs_socket, "-env "); |
1566 | quote_argument (emacs_socket, environ[i]); | |
1567 | send_to_emacs (emacs_socket, " "); | |
59e085e0 | 1568 | } |
2828d5f9 | 1569 | } |
ba528748 SM |
1570 | send_to_emacs (emacs_socket, "-dir "); |
1571 | quote_argument (emacs_socket, cwd); | |
1572 | send_to_emacs (emacs_socket, "/"); | |
1573 | send_to_emacs (emacs_socket, " "); | |
2828d5f9 | 1574 | |
6afdd335 | 1575 | retry: |
5212210c | 1576 | if (nowait) |
486ba65f | 1577 | send_to_emacs (emacs_socket, "-nowait "); |
292d74a3 | 1578 | |
92071250 | 1579 | if (current_frame) |
486ba65f | 1580 | send_to_emacs (emacs_socket, "-current-frame "); |
c0f342ab | 1581 | |
30be2360 | 1582 | if (display) |
87209357 | 1583 | { |
486ba65f JR |
1584 | send_to_emacs (emacs_socket, "-display "); |
1585 | quote_argument (emacs_socket, display); | |
1586 | send_to_emacs (emacs_socket, " "); | |
87209357 | 1587 | } |
30be2360 | 1588 | |
8536c0f5 CY |
1589 | /* If using the current frame, send tty information to Emacs anyway. |
1590 | In daemon mode, Emacs may need to occupy this tty if no other | |
1591 | frame is available. */ | |
322ca650 | 1592 | if (tty || (current_frame && !eval)) |
9628b887 | 1593 | { |
273b9028 | 1594 | char *tty_type, *tty_name; |
0b0d3e0b | 1595 | |
273b9028 CY |
1596 | if (find_tty (&tty_type, &tty_name, !tty)) |
1597 | { | |
b2ff54a0 | 1598 | #if !defined (NO_SOCKETS_IN_FILE_SYSTEM) |
273b9028 | 1599 | init_signals (); |
b2ff54a0 | 1600 | #endif |
273b9028 CY |
1601 | send_to_emacs (emacs_socket, "-tty "); |
1602 | quote_argument (emacs_socket, tty_name); | |
1603 | send_to_emacs (emacs_socket, " "); | |
1604 | quote_argument (emacs_socket, tty_type); | |
1605 | send_to_emacs (emacs_socket, " "); | |
1606 | } | |
9628b887 | 1607 | } |
77134727 | 1608 | |
273b9028 | 1609 | if (!current_frame && !tty) |
486ba65f | 1610 | send_to_emacs (emacs_socket, "-window-system "); |
0b0d3e0b | 1611 | |
87209357 | 1612 | if ((argc - optind > 0)) |
5212210c | 1613 | { |
87209357 | 1614 | for (i = optind; i < argc; i++) |
46cec291 | 1615 | { |
0b0d3e0b | 1616 | |
87209357 | 1617 | if (eval) |
0b0d3e0b | 1618 | { |
974b73e8 | 1619 | /* Don't prepend cwd or anything like that. */ |
486ba65f JR |
1620 | send_to_emacs (emacs_socket, "-eval "); |
1621 | quote_argument (emacs_socket, argv[i]); | |
1622 | send_to_emacs (emacs_socket, " "); | |
0b0d3e0b KL |
1623 | continue; |
1624 | } | |
1625 | ||
1626 | if (*argv[i] == '+') | |
1627 | { | |
87209357 EZ |
1628 | char *p = argv[i] + 1; |
1629 | while (isdigit ((unsigned char) *p) || *p == ':') p++; | |
0b0d3e0b KL |
1630 | if (*p == 0) |
1631 | { | |
486ba65f JR |
1632 | send_to_emacs (emacs_socket, "-position "); |
1633 | quote_argument (emacs_socket, argv[i]); | |
1634 | send_to_emacs (emacs_socket, " "); | |
0b0d3e0b KL |
1635 | continue; |
1636 | } | |
0b0d3e0b | 1637 | } |
0b0d3e0b | 1638 | |
486ba65f | 1639 | send_to_emacs (emacs_socket, "-file "); |
486ba65f JR |
1640 | quote_argument (emacs_socket, argv[i]); |
1641 | send_to_emacs (emacs_socket, " "); | |
0b0d3e0b | 1642 | } |
46cec291 | 1643 | } |
273b9028 | 1644 | else if (eval) |
87209357 | 1645 | { |
273b9028 CY |
1646 | /* Read expressions interactively. */ |
1647 | while ((str = fgets (string, BUFSIZ, stdin))) | |
1648 | { | |
1649 | send_to_emacs (emacs_socket, "-eval "); | |
1650 | quote_argument (emacs_socket, str); | |
1651 | } | |
1652 | send_to_emacs (emacs_socket, " "); | |
87209357 | 1653 | } |
0b0d3e0b | 1654 | |
486ba65f | 1655 | send_to_emacs (emacs_socket, "\n"); |
46cec291 | 1656 | |
fc2040c0 KL |
1657 | /* Wait for an answer. */ |
1658 | if (!eval && !tty && !nowait) | |
30be2360 SM |
1659 | { |
1660 | printf ("Waiting for Emacs..."); | |
1661 | needlf = 2; | |
1662 | } | |
46cec291 | 1663 | fflush (stdout); |
0b0d3e0b | 1664 | fsync (1); |
46cec291 | 1665 | |
3cf8c6aa | 1666 | /* Now, wait for an answer and print any messages. */ |
4b7b77f6 | 1667 | while ((rl = recv (emacs_socket, string, BUFSIZ, 0)) > 0) |
3cf8c6aa | 1668 | { |
974b73e8 KL |
1669 | char *p; |
1670 | string[rl] = '\0'; | |
1671 | ||
1672 | p = string + strlen (string) - 1; | |
1673 | while (p > string && *p == '\n') | |
0b0d3e0b KL |
1674 | *p-- = 0; |
1675 | ||
31fa6595 | 1676 | if (strprefix ("-emacs-pid ", string)) |
4d553a13 | 1677 | { |
6afdd335 | 1678 | /* -emacs-pid PID: The process id of the Emacs process. */ |
77134727 KL |
1679 | emacs_pid = strtol (string + strlen ("-emacs-pid"), NULL, 10); |
1680 | } | |
974b73e8 | 1681 | else if (strprefix ("-window-system-unsupported ", string)) |
6afdd335 KL |
1682 | { |
1683 | /* -window-system-unsupported: Emacs was compiled without X | |
1684 | support. Try again on the terminal. */ | |
6afdd335 KL |
1685 | nowait = 0; |
1686 | tty = 1; | |
1687 | goto retry; | |
1688 | } | |
974b73e8 | 1689 | else if (strprefix ("-print ", string)) |
77134727 | 1690 | { |
6afdd335 | 1691 | /* -print STRING: Print STRING on the terminal. */ |
974b73e8 | 1692 | str = unquote_argument (string + strlen ("-print ")); |
0b0d3e0b | 1693 | if (needlf) |
77134727 | 1694 | printf ("\n"); |
0b0d3e0b KL |
1695 | printf ("%s", str); |
1696 | needlf = str[0] == '\0' ? needlf : str[strlen (str) - 1] != '\n'; | |
77134727 | 1697 | } |
974b73e8 | 1698 | else if (strprefix ("-error ", string)) |
77134727 | 1699 | { |
6afdd335 | 1700 | /* -error DESCRIPTION: Signal an error on the terminal. */ |
974b73e8 | 1701 | str = unquote_argument (string + strlen ("-error ")); |
0b0d3e0b KL |
1702 | if (needlf) |
1703 | printf ("\n"); | |
974b73e8 | 1704 | fprintf (stderr, "*ERROR*: %s", str); |
0b0d3e0b KL |
1705 | needlf = str[0] == '\0' ? needlf : str[strlen (str) - 1] != '\n'; |
1706 | } | |
c801ad51 | 1707 | #ifdef SIGSTOP |
382707ec | 1708 | else if (strprefix ("-suspend ", string)) |
0b0d3e0b | 1709 | { |
6afdd335 | 1710 | /* -suspend: Suspend this terminal, i.e., stop the process. */ |
0b0d3e0b | 1711 | if (needlf) |
77134727 | 1712 | printf ("\n"); |
0b0d3e0b KL |
1713 | needlf = 0; |
1714 | kill (0, SIGSTOP); | |
4d553a13 | 1715 | } |
b2ff54a0 | 1716 | #endif |
4d553a13 KL |
1717 | else |
1718 | { | |
6afdd335 | 1719 | /* Unknown command. */ |
0b0d3e0b | 1720 | if (needlf) |
4d553a13 | 1721 | printf ("\n"); |
974b73e8 KL |
1722 | printf ("*ERROR*: Unknown message: %s", string); |
1723 | needlf = string[0] == '\0' ? needlf : string[strlen (string) - 1] != '\n'; | |
4d553a13 | 1724 | } |
3cf8c6aa SM |
1725 | } |
1726 | ||
1727 | if (needlf) | |
1728 | printf ("\n"); | |
1729 | fflush (stdout); | |
0b0d3e0b | 1730 | fsync (1); |
23a7488d | 1731 | |
4b7b77f6 | 1732 | CLOSE_SOCKET (emacs_socket); |
65396510 | 1733 | return EXIT_SUCCESS; |
46cec291 RS |
1734 | } |
1735 | ||
1e7823d0 | 1736 | #endif /* HAVE_SOCKETS && HAVE_INET_SOCKETS */ |
aa0b6932 | 1737 | |
27711600 RM |
1738 | \f |
1739 | #ifndef HAVE_STRERROR | |
1740 | char * | |
1741 | strerror (errnum) | |
1742 | int errnum; | |
1743 | { | |
1744 | extern char *sys_errlist[]; | |
1745 | extern int sys_nerr; | |
1746 | ||
1747 | if (errnum >= 0 && errnum < sys_nerr) | |
1748 | return sys_errlist[errnum]; | |
1749 | return (char *) "Unknown error"; | |
1750 | } | |
1751 | ||
1752 | #endif /* ! HAVE_STRERROR */ | |
ab5796a9 MB |
1753 | |
1754 | /* arch-tag: f39bb9c4-73eb-477e-896d-50832e2ca9a7 | |
1755 | (do not change this comment) */ | |
65396510 TTN |
1756 | |
1757 | /* emacsclient.c ends here */ |