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, |
a5b68355 | 3 | 2005, 2006, 2007, 2008 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 | ||
ed4a3730 JB |
44 | # include <sys/types.h> |
45 | ||
1e7823d0 JB |
46 | # ifdef HAVE_INET_SOCKETS |
47 | # include <netinet/in.h> | |
48 | # endif | |
411b80a5 | 49 | |
448d4085 DN |
50 | # include <darpa/inet.h> |
51 | ||
e35fc962 | 52 | # define INVALID_SOCKET -1 |
aa0b6932 JB |
53 | # define HSOCKET int |
54 | # define CLOSE_SOCKET close | |
aa0b6932 | 55 | # define INITIALIZE() |
411b80a5 JB |
56 | |
57 | #endif /* !WINDOWSNT */ | |
aa0b6932 | 58 | |
4e23f2ba | 59 | #undef signal |
46cec291 | 60 | |
42073bfb | 61 | #include <stdarg.h> |
e69233c2 | 62 | #include <ctype.h> |
8f9aaa0a | 63 | #include <stdio.h> |
aa0b6932 | 64 | #include "getopt.h" |
79f13bba DL |
65 | #ifdef HAVE_UNISTD_H |
66 | #include <unistd.h> | |
67 | #endif | |
8f9aaa0a | 68 | |
aa0b6932 JB |
69 | #ifdef WINDOWSNT |
70 | # include <io.h> | |
71 | #else /* not WINDOWSNT */ | |
9f637eea | 72 | # include <pwd.h> |
aa0b6932 | 73 | #endif /* not WINDOWSNT */ |
dc4a4a14 | 74 | #include <sys/stat.h> |
9f637eea | 75 | |
9628b887 | 76 | #include <signal.h> |
4d553a13 | 77 | #include <errno.h> |
9628b887 KL |
78 | |
79 | \f | |
8f9aaa0a | 80 | char *getenv (), *getwd (); |
5b9562c3 | 81 | char *(getcwd) (); |
8f9aaa0a | 82 | |
7ce8671d JB |
83 | #ifdef WINDOWSNT |
84 | char *w32_getenv (); | |
85 | #define egetenv(VAR) w32_getenv(VAR) | |
86 | #else | |
87 | #define egetenv(VAR) getenv(VAR) | |
88 | #endif | |
89 | ||
8f9aaa0a RS |
90 | #ifndef VERSION |
91 | #define VERSION "unspecified" | |
92 | #endif | |
93 | \f | |
aa0b6932 JB |
94 | |
95 | #ifndef EXIT_SUCCESS | |
96 | #define EXIT_SUCCESS 0 | |
97 | #endif | |
98 | ||
99 | #ifndef EXIT_FAILURE | |
100 | #define EXIT_FAILURE 1 | |
101 | #endif | |
102 | ||
103 | #ifndef FALSE | |
104 | #define FALSE 0 | |
105 | #endif | |
106 | ||
107 | #ifndef TRUE | |
108 | #define TRUE 1 | |
109 | #endif | |
110 | ||
111 | #ifndef NO_RETURN | |
112 | #define NO_RETURN | |
113 | #endif | |
bc558f3e JB |
114 | |
115 | /* Additional space when allocating buffers for filenames, etc. */ | |
116 | #define EXTRA_SPACE 100 | |
117 | ||
aa0b6932 | 118 | \f |
8f9aaa0a RS |
119 | /* Name used to invoke this program. */ |
120 | char *progname; | |
121 | ||
0a125897 KL |
122 | /* The second argument to main. */ |
123 | char **main_argv; | |
124 | ||
749ae770 | 125 | /* Nonzero means don't wait for a response from Emacs. --no-wait. */ |
8f9aaa0a RS |
126 | int nowait = 0; |
127 | ||
30be2360 SM |
128 | /* Nonzero means args are expressions to be evaluated. --eval. */ |
129 | int eval = 0; | |
130 | ||
31fa6595 SM |
131 | /* Nonzero means don't open a new frame. Inverse of --create-frame. */ |
132 | int current_frame = 1; | |
92071250 | 133 | |
30be2360 SM |
134 | /* The display on which Emacs should work. --display. */ |
135 | char *display = NULL; | |
136 | ||
9628b887 | 137 | /* Nonzero means open a new Emacs frame on the current terminal. */ |
77134727 | 138 | int tty = 0; |
9628b887 | 139 | |
30be2360 SM |
140 | /* If non-NULL, the name of an editor to fallback to if the server |
141 | is not running. --alternate-editor. */ | |
b03d27bd | 142 | const char *alternate_editor = NULL; |
30be2360 | 143 | |
3db926be | 144 | /* If non-NULL, the filename of the UNIX socket. */ |
254107e4 RS |
145 | char *socket_name = NULL; |
146 | ||
aa0b6932 JB |
147 | /* If non-NULL, the filename of the authentication file. */ |
148 | char *server_file = NULL; | |
149 | ||
c66648e0 JB |
150 | /* PID of the Emacs server process. */ |
151 | int emacs_pid = 0; | |
152 | ||
2381d38d | 153 | void print_help_and_exit () NO_RETURN; |
7f3bff3e | 154 | |
8f9aaa0a RS |
155 | struct option longopts[] = |
156 | { | |
749ae770 | 157 | { "no-wait", no_argument, NULL, 'n' }, |
30be2360 | 158 | { "eval", no_argument, NULL, 'e' }, |
8f9aaa0a RS |
159 | { "help", no_argument, NULL, 'H' }, |
160 | { "version", no_argument, NULL, 'V' }, | |
b28c910d | 161 | { "tty", no_argument, NULL, 't' }, |
dc1cd5f7 | 162 | { "nw", no_argument, NULL, 't' }, |
31fa6595 | 163 | { "create-frame", no_argument, NULL, 'c' }, |
3cf8c6aa | 164 | { "alternate-editor", required_argument, NULL, 'a' }, |
b03d27bd | 165 | #ifndef NO_SOCKETS_IN_FILE_SYSTEM |
254107e4 | 166 | { "socket-name", required_argument, NULL, 's' }, |
b03d27bd | 167 | #endif |
aa0b6932 | 168 | { "server-file", required_argument, NULL, 'f' }, |
0ebec7d3 | 169 | #ifndef WINDOWSNT |
30be2360 | 170 | { "display", required_argument, NULL, 'd' }, |
0ebec7d3 | 171 | #endif |
30be2360 | 172 | { 0, 0, 0, 0 } |
8f9aaa0a RS |
173 | }; |
174 | ||
974b73e8 KL |
175 | \f |
176 | /* Like malloc but get fatal error if memory is exhausted. */ | |
177 | ||
178 | long * | |
179 | xmalloc (size) | |
180 | unsigned int size; | |
181 | { | |
182 | long *result = (long *) malloc (size); | |
183 | if (result == NULL) | |
184 | { | |
185 | perror ("malloc"); | |
186 | exit (EXIT_FAILURE); | |
187 | } | |
188 | return result; | |
189 | } | |
190 | ||
191 | /* Like strdup but get a fatal error if memory is exhausted. */ | |
192 | ||
193 | char * | |
194 | xstrdup (const char *s) | |
195 | { | |
196 | char *result = strdup (s); | |
197 | if (result == NULL) | |
198 | { | |
199 | perror ("strdup"); | |
200 | exit (EXIT_FAILURE); | |
201 | } | |
202 | return result; | |
203 | } | |
204 | ||
205 | /* From sysdep.c */ | |
206 | #if !defined (HAVE_GET_CURRENT_DIR_NAME) || defined (BROKEN_GET_CURRENT_DIR_NAME) | |
207 | ||
cb06b8dc SM |
208 | /* From lisp.h */ |
209 | #ifndef DIRECTORY_SEP | |
210 | #define DIRECTORY_SEP '/' | |
211 | #endif | |
212 | #ifndef IS_DIRECTORY_SEP | |
213 | #define IS_DIRECTORY_SEP(_c_) ((_c_) == DIRECTORY_SEP) | |
214 | #endif | |
215 | #ifndef IS_DEVICE_SEP | |
216 | #ifndef DEVICE_SEP | |
217 | #define IS_DEVICE_SEP(_c_) 0 | |
218 | #else | |
219 | #define IS_DEVICE_SEP(_c_) ((_c_) == DEVICE_SEP) | |
220 | #endif | |
221 | #endif | |
222 | #ifndef IS_ANY_SEP | |
223 | #define IS_ANY_SEP(_c_) (IS_DIRECTORY_SEP (_c_)) | |
224 | #endif | |
225 | ||
226 | ||
974b73e8 | 227 | /* Return the current working directory. Returns NULL on errors. |
5ab73228 | 228 | Any other returned value must be freed with free. This is used |
974b73e8 KL |
229 | only when get_current_dir_name is not defined on the system. */ |
230 | char* | |
231 | get_current_dir_name () | |
232 | { | |
233 | char *buf; | |
234 | char *pwd; | |
235 | struct stat dotstat, pwdstat; | |
236 | /* If PWD is accurate, use it instead of calling getwd. PWD is | |
237 | sometimes a nicer name, and using it may avoid a fatal error if a | |
238 | parent directory is searchable but not readable. */ | |
7ce8671d | 239 | if ((pwd = egetenv ("PWD")) != 0 |
974b73e8 KL |
240 | && (IS_DIRECTORY_SEP (*pwd) || (*pwd && IS_DEVICE_SEP (pwd[1]))) |
241 | && stat (pwd, &pwdstat) == 0 | |
242 | && stat (".", &dotstat) == 0 | |
243 | && dotstat.st_ino == pwdstat.st_ino | |
244 | && dotstat.st_dev == pwdstat.st_dev | |
245 | #ifdef MAXPATHLEN | |
246 | && strlen (pwd) < MAXPATHLEN | |
247 | #endif | |
248 | ) | |
249 | { | |
250 | buf = (char *) xmalloc (strlen (pwd) + 1); | |
251 | if (!buf) | |
252 | return NULL; | |
253 | strcpy (buf, pwd); | |
254 | } | |
255 | #ifdef HAVE_GETCWD | |
256 | else | |
257 | { | |
258 | size_t buf_size = 1024; | |
259 | buf = (char *) xmalloc (buf_size); | |
260 | if (!buf) | |
261 | return NULL; | |
262 | for (;;) | |
263 | { | |
264 | if (getcwd (buf, buf_size) == buf) | |
265 | break; | |
266 | if (errno != ERANGE) | |
267 | { | |
268 | int tmp_errno = errno; | |
269 | free (buf); | |
270 | errno = tmp_errno; | |
271 | return NULL; | |
272 | } | |
273 | buf_size *= 2; | |
274 | buf = (char *) realloc (buf, buf_size); | |
275 | if (!buf) | |
276 | return NULL; | |
277 | } | |
278 | } | |
279 | #else | |
280 | else | |
281 | { | |
282 | /* We need MAXPATHLEN here. */ | |
283 | buf = (char *) xmalloc (MAXPATHLEN + 1); | |
284 | if (!buf) | |
285 | return NULL; | |
286 | if (getwd (buf) == NULL) | |
287 | { | |
288 | int tmp_errno = errno; | |
289 | free (buf); | |
290 | errno = tmp_errno; | |
291 | return NULL; | |
292 | } | |
293 | } | |
294 | #endif | |
295 | return buf; | |
296 | } | |
297 | #endif | |
298 | ||
42073bfb | 299 | #ifdef WINDOWSNT |
7ce8671d JB |
300 | |
301 | #define REG_ROOT "SOFTWARE\\GNU\\Emacs" | |
302 | ||
303 | /* Retrieve an environment variable from the Emacs subkeys of the registry. | |
304 | Return NULL if the variable was not found, or it was empty. | |
305 | This code is based on w32_get_resource (w32.c). */ | |
306 | char * | |
307 | w32_get_resource (predefined, key, type) | |
308 | HKEY predefined; | |
309 | char *key; | |
310 | LPDWORD type; | |
311 | { | |
312 | HKEY hrootkey = NULL; | |
313 | char *result = NULL; | |
314 | DWORD cbData; | |
315 | ||
316 | if (RegOpenKeyEx (predefined, REG_ROOT, 0, KEY_READ, &hrootkey) == ERROR_SUCCESS) | |
317 | { | |
318 | if (RegQueryValueEx (hrootkey, key, NULL, NULL, NULL, &cbData) == ERROR_SUCCESS) | |
319 | { | |
320 | result = (char *) xmalloc (cbData); | |
321 | ||
bc558f3e JB |
322 | if ((RegQueryValueEx (hrootkey, key, NULL, type, result, &cbData) != ERROR_SUCCESS) |
323 | || (*result == 0)) | |
7ce8671d JB |
324 | { |
325 | free (result); | |
326 | result = NULL; | |
327 | } | |
328 | } | |
329 | ||
330 | RegCloseKey (hrootkey); | |
331 | } | |
332 | ||
333 | return result; | |
334 | } | |
335 | ||
336 | /* | |
337 | getenv wrapper for Windows | |
338 | ||
339 | This is needed to duplicate Emacs's behavior, which is to look for enviroment | |
340 | variables in the registry if they don't appear in the environment. | |
341 | */ | |
342 | char * | |
343 | w32_getenv (envvar) | |
344 | char *envvar; | |
345 | { | |
346 | char *value; | |
347 | DWORD dwType; | |
348 | ||
349 | if (value = getenv (envvar)) | |
350 | /* Found in the environment. */ | |
351 | return value; | |
352 | ||
353 | if (! (value = w32_get_resource (HKEY_CURRENT_USER, envvar, &dwType)) && | |
354 | ! (value = w32_get_resource (HKEY_LOCAL_MACHINE, envvar, &dwType))) | |
d41784ee EZ |
355 | { |
356 | /* "w32console" is what Emacs on Windows uses for tty-type under -nw. */ | |
357 | if (strcmp (envvar, "TERM") == 0) | |
358 | return xstrdup ("w32console"); | |
359 | /* Found neither in the environment nor in the registry. */ | |
360 | return NULL; | |
361 | } | |
7ce8671d JB |
362 | |
363 | if (dwType == REG_SZ) | |
364 | /* Registry; no need to expand. */ | |
365 | return value; | |
366 | ||
367 | if (dwType == REG_EXPAND_SZ) | |
368 | { | |
369 | DWORD size; | |
370 | ||
371 | if (size = ExpandEnvironmentStrings (value, NULL, 0)) | |
372 | { | |
373 | char *buffer = (char *) xmalloc (size); | |
374 | if (ExpandEnvironmentStrings (value, buffer, size)) | |
375 | { | |
376 | /* Found and expanded. */ | |
377 | free (value); | |
378 | return buffer; | |
379 | } | |
380 | ||
381 | /* Error expanding. */ | |
382 | free (buffer); | |
383 | } | |
384 | } | |
385 | ||
386 | /* Not the right type, or not correctly expanded. */ | |
387 | free (value); | |
388 | return NULL; | |
389 | } | |
390 | ||
42073bfb | 391 | int |
f0384499 | 392 | w32_window_app () |
42073bfb JB |
393 | { |
394 | static int window_app = -1; | |
395 | char szTitle[MAX_PATH]; | |
396 | ||
397 | if (window_app < 0) | |
dbf60b07 JR |
398 | { |
399 | /* Checking for STDOUT does not work; it's a valid handle also in | |
400 | nonconsole apps. Testing for the console title seems to work. */ | |
401 | window_app = (GetConsoleTitleA (szTitle, MAX_PATH) == 0); | |
402 | if (window_app) | |
403 | InitCommonControls(); | |
404 | } | |
42073bfb JB |
405 | |
406 | return window_app; | |
407 | } | |
105faa84 DN |
408 | |
409 | /* | |
cb06b8dc | 410 | execvp wrapper for Windows. Quotes arguments with embedded spaces. |
105faa84 DN |
411 | |
412 | This is necessary due to the broken implementation of exec* routines in | |
413 | the Microsoft libraries: they concatenate the arguments together without | |
414 | quoting special characters, and pass the result to CreateProcess, with | |
415 | predictably bad results. By contrast, Posix execvp passes the arguments | |
416 | directly into the argv array of the child process. | |
417 | */ | |
418 | int | |
419 | w32_execvp (path, argv) | |
420 | char *path; | |
421 | char **argv; | |
422 | { | |
423 | int i; | |
424 | ||
425 | /* Required to allow a .BAT script as alternate editor. */ | |
426 | argv[0] = (char *) alternate_editor; | |
427 | ||
428 | for (i = 0; argv[i]; i++) | |
429 | if (strchr (argv[i], ' ')) | |
430 | { | |
431 | char *quoted = alloca (strlen (argv[i]) + 3); | |
432 | sprintf (quoted, "\"%s\"", argv[i]); | |
433 | argv[i] = quoted; | |
434 | } | |
435 | ||
436 | return execvp (path, argv); | |
437 | } | |
438 | ||
439 | #undef execvp | |
440 | #define execvp w32_execvp | |
441 | ||
d41784ee EZ |
442 | /* Emulation of ttyname for Windows. */ |
443 | char * | |
444 | ttyname (int fd) | |
445 | { | |
446 | return "CONOUT$"; | |
447 | } | |
448 | ||
105faa84 | 449 | #endif /* WINDOWSNT */ |
42073bfb | 450 | |
f387c1ee JB |
451 | /* Display a normal or error message. |
452 | On Windows, use a message box if compiled as a Windows app. */ | |
42073bfb JB |
453 | void |
454 | message (int is_error, char *message, ...) | |
455 | { | |
c66648e0 | 456 | char msg [2048]; |
42073bfb JB |
457 | va_list args; |
458 | ||
459 | va_start (args, message); | |
42073bfb JB |
460 | vsprintf (msg, message, args); |
461 | va_end (args); | |
462 | ||
463 | #ifdef WINDOWSNT | |
464 | if (w32_window_app ()) | |
465 | { | |
466 | if (is_error) | |
467 | MessageBox (NULL, msg, "Emacsclient ERROR", MB_ICONERROR); | |
468 | else | |
469 | MessageBox (NULL, msg, "Emacsclient", MB_ICONINFORMATION); | |
470 | } | |
471 | else | |
472 | #endif | |
9219db75 JB |
473 | { |
474 | FILE *f = is_error ? stderr : stdout; | |
475 | ||
476 | fputs (msg, f); | |
477 | fflush (f); | |
478 | } | |
42073bfb JB |
479 | } |
480 | ||
8f9aaa0a | 481 | /* Decode the options from argv and argc. |
5212210c | 482 | The global variable `optind' will say how many arguments we used up. */ |
8f9aaa0a | 483 | |
5212210c | 484 | void |
8f9aaa0a RS |
485 | decode_options (argc, argv) |
486 | int argc; | |
487 | char **argv; | |
488 | { | |
7ce8671d | 489 | alternate_editor = egetenv ("ALTERNATE_EDITOR"); |
0ea5797a | 490 | |
8f9aaa0a RS |
491 | while (1) |
492 | { | |
dc1cd5f7 | 493 | int opt = getopt_long_only (argc, argv, |
b03d27bd | 494 | #ifndef NO_SOCKETS_IN_FILE_SYSTEM |
974b73e8 | 495 | "VHnea:s:f:d:tc", |
b03d27bd | 496 | #else |
974b73e8 | 497 | "VHnea:f:d:tc", |
b03d27bd | 498 | #endif |
974b73e8 | 499 | longopts, 0); |
8f9aaa0a RS |
500 | |
501 | if (opt == EOF) | |
502 | break; | |
503 | ||
504 | switch (opt) | |
505 | { | |
506 | case 0: | |
507 | /* If getopt returns 0, then it has already processed a | |
508 | long-named option. We should do nothing. */ | |
509 | break; | |
e69233c2 | 510 | |
97e3214d GM |
511 | case 'a': |
512 | alternate_editor = optarg; | |
513 | break; | |
e69233c2 | 514 | |
b03d27bd | 515 | #ifndef NO_SOCKETS_IN_FILE_SYSTEM |
254107e4 RS |
516 | case 's': |
517 | socket_name = optarg; | |
518 | break; | |
b03d27bd | 519 | #endif |
254107e4 | 520 | |
aa0b6932 JB |
521 | case 'f': |
522 | server_file = optarg; | |
523 | break; | |
254107e4 | 524 | |
0ea5797a SM |
525 | /* We used to disallow this argument in w32, but it seems better |
526 | to allow it, for the occasional case where the user is | |
527 | connecting with a w32 client to a server compiled with X11 | |
528 | support. */ | |
30be2360 SM |
529 | case 'd': |
530 | display = optarg; | |
531 | break; | |
532 | ||
8f9aaa0a RS |
533 | case 'n': |
534 | nowait = 1; | |
535 | break; | |
536 | ||
30be2360 SM |
537 | case 'e': |
538 | eval = 1; | |
539 | break; | |
540 | ||
8f9aaa0a | 541 | case 'V': |
42073bfb | 542 | message (FALSE, "emacsclient %s\n", VERSION); |
65396510 | 543 | exit (EXIT_SUCCESS); |
8f9aaa0a | 544 | break; |
46cec291 | 545 | |
819b8f00 | 546 | case 't': |
77134727 | 547 | tty = 1; |
c1b8e896 | 548 | current_frame = 0; |
77134727 KL |
549 | break; |
550 | ||
e5299d8d | 551 | case 'c': |
31fa6595 | 552 | current_frame = 0; |
9628b887 | 553 | break; |
0b0d3e0b | 554 | |
8f9aaa0a | 555 | case 'H': |
8f9aaa0a | 556 | print_help_and_exit (); |
20c396e8 JB |
557 | break; |
558 | ||
559 | default: | |
42073bfb | 560 | message (TRUE, "Try `%s --help' for more information\n", progname); |
65396510 | 561 | exit (EXIT_FAILURE); |
20c396e8 | 562 | break; |
8f9aaa0a RS |
563 | } |
564 | } | |
9628b887 | 565 | |
273b9028 CY |
566 | /* If the -c option is used (without -t) and no --display argument |
567 | is provided, try $DISPLAY. | |
568 | Without the -c option, we used to set `display' to $DISPLAY by | |
569 | default, but this changed the default behavior and is sometimes | |
570 | inconvenient. So we force users to use "--display $DISPLAY" if | |
571 | they want Emacs to connect to their current display. */ | |
09317bf4 | 572 | if (!current_frame && !tty && !display) |
9997dc15 SM |
573 | display = egetenv ("DISPLAY"); |
574 | ||
273b9028 | 575 | /* A null-string display is invalid. */ |
0ea5797a SM |
576 | if (display && strlen (display) == 0) |
577 | display = NULL; | |
578 | ||
273b9028 CY |
579 | /* If no display is available, new frames are tty frames. */ |
580 | if (!current_frame && !display) | |
92071250 | 581 | tty = 1; |
c0f342ab | 582 | |
b8ccaf6f | 583 | /* --no-wait implies --current-frame on ttys when there are file |
273b9028 | 584 | arguments or expressions given. */ |
b8ccaf6f | 585 | if (nowait && tty && argc - optind > 0) |
92071250 | 586 | current_frame = 1; |
8f9aaa0a RS |
587 | } |
588 | ||
974b73e8 | 589 | \f |
7f3bff3e | 590 | void |
8f9aaa0a RS |
591 | print_help_and_exit () |
592 | { | |
c0f342ab JB |
593 | /* Spaces and tabs are significant in this message; they're chosen so the |
594 | message aligns properly both in a tty and in a Windows message box. | |
595 | Please try to preserve them; otherwise the output is very hard to read | |
596 | when using emacsclientw. */ | |
42073bfb | 597 | message (FALSE, |
974b73e8 | 598 | "Usage: %s [OPTIONS] FILE...\n\ |
30be2360 SM |
599 | Tell the Emacs server to visit the specified files.\n\ |
600 | Every FILE can be either just a FILENAME or [+LINE[:COLUMN]] FILENAME.\n\ | |
20c396e8 | 601 | \n\ |
30be2360 | 602 | The following OPTIONS are accepted:\n\ |
c0f342ab JB |
603 | -V, --version Just print version info and return\n\ |
604 | -H, --help Print this usage information message\n\ | |
dc1cd5f7 | 605 | -nw, -t, --tty Open a new Emacs frame on the current terminal\n\ |
c4b858e3 | 606 | -c, --create-frame Create a new frame instead of trying to\n\ |
c0f342ab JB |
607 | use the current Emacs frame\n\ |
608 | -e, --eval Evaluate the FILE arguments as ELisp expressions\n\ | |
d07529f3 JB |
609 | -n, --no-wait Don't wait for the server to return\n\ |
610 | -d, --display=DISPLAY Visit the file in the given display\n" | |
aa0b6932 JB |
611 | #ifndef NO_SOCKETS_IN_FILE_SYSTEM |
612 | "-s, --socket-name=FILENAME\n\ | |
c0f342ab | 613 | Set filename of the UNIX socket for communication\n" |
aa0b6932 JB |
614 | #endif |
615 | "-f, --server-file=FILENAME\n\ | |
c0f342ab | 616 | Set filename of the TCP authentication file\n\ |
30be2360 | 617 | -a, --alternate-editor=EDITOR\n\ |
c0f342ab | 618 | Editor to fallback to if the server is not running\n\ |
20c396e8 | 619 | \n\ |
30be2360 | 620 | Report bugs to bug-gnu-emacs@gnu.org.\n", progname); |
65396510 | 621 | exit (EXIT_SUCCESS); |
8f9aaa0a | 622 | } |
5212210c | 623 | |
aa0b6932 JB |
624 | /* |
625 | Try to run a different command, or --if no alternate editor is | |
626 | defined-- exit with an errorcode. | |
cb06b8dc | 627 | Uses argv, but gets it from the global variable main_argv. |
aa0b6932 JB |
628 | */ |
629 | void | |
974b73e8 | 630 | fail (void) |
9002956f | 631 | { |
aa0b6932 | 632 | if (alternate_editor) |
9002956f | 633 | { |
aa0b6932 | 634 | int i = optind - 1; |
4472aef4 | 635 | |
974b73e8 | 636 | execvp (alternate_editor, main_argv + i); |
42073bfb | 637 | message (TRUE, "%s: error executing alternate editor \"%s\"\n", |
974b73e8 | 638 | progname, alternate_editor); |
9002956f | 639 | } |
aa0b6932 | 640 | exit (EXIT_FAILURE); |
9002956f KL |
641 | } |
642 | ||
aa0b6932 | 643 | \f |
1e7823d0 | 644 | #if !defined (HAVE_SOCKETS) || !defined (HAVE_INET_SOCKETS) |
9002956f | 645 | |
aa0b6932 JB |
646 | int |
647 | main (argc, argv) | |
648 | int argc; | |
649 | char **argv; | |
9002956f | 650 | { |
974b73e8 KL |
651 | main_argv = argv; |
652 | progname = argv[0]; | |
653 | message (TRUE, "%s: Sorry, the Emacs server is supported only\n" | |
c0f342ab | 654 | "on systems with Berkeley sockets.\n", |
aa0b6932 | 655 | argv[0]); |
974b73e8 | 656 | fail (); |
9002956f KL |
657 | } |
658 | ||
1e7823d0 | 659 | #else /* HAVE_SOCKETS && HAVE_INET_SOCKETS */ |
2828d5f9 | 660 | |
aa0b6932 JB |
661 | #ifdef WINDOWSNT |
662 | # include <winsock2.h> | |
2828d5f9 | 663 | #else |
aa0b6932 JB |
664 | # include <sys/types.h> |
665 | # include <sys/socket.h> | |
666 | # include <sys/un.h> | |
aa0b6932 JB |
667 | #endif |
668 | ||
669 | #define AUTH_KEY_LENGTH 64 | |
670 | #define SEND_BUFFER_SIZE 4096 | |
671 | ||
672 | extern char *strerror (); | |
673 | extern int errno; | |
674 | ||
675 | /* Buffer to accumulate data to send in TCP connections. */ | |
676 | char send_buffer[SEND_BUFFER_SIZE + 1]; | |
677 | int sblen = 0; /* Fill pointer for the send buffer. */ | |
4b7b77f6 JR |
678 | /* Socket used to communicate with the Emacs server process. */ |
679 | HSOCKET emacs_socket = 0; | |
aa0b6932 | 680 | |
d22b00e5 JR |
681 | /* On Windows, the socket library was historically separate from the standard |
682 | C library, so errors are handled differently. */ | |
683 | void | |
684 | sock_err_message (function_name) | |
685 | char *function_name; | |
686 | { | |
687 | #ifdef WINDOWSNT | |
688 | char* msg = NULL; | |
689 | ||
690 | FormatMessage (FORMAT_MESSAGE_FROM_SYSTEM | |
691 | | FORMAT_MESSAGE_ALLOCATE_BUFFER | |
692 | | FORMAT_MESSAGE_ARGUMENT_ARRAY, | |
693 | NULL, WSAGetLastError (), 0, (LPTSTR)&msg, 0, NULL); | |
694 | ||
695 | message (TRUE, "%s: %s: %s\n", progname, function_name, msg); | |
696 | ||
697 | LocalFree (msg); | |
698 | #else | |
699 | message (TRUE, "%s: %s: %s\n", progname, function_name, strerror (errno)); | |
700 | #endif | |
701 | } | |
702 | ||
703 | ||
aa0b6932 JB |
704 | /* Let's send the data to Emacs when either |
705 | - the data ends in "\n", or | |
706 | - the buffer is full (but this shouldn't happen) | |
707 | Otherwise, we just accumulate it. */ | |
b03d27bd JB |
708 | void |
709 | send_to_emacs (s, data) | |
aa0b6932 JB |
710 | HSOCKET s; |
711 | char *data; | |
712 | { | |
713 | while (data) | |
2828d5f9 | 714 | { |
aa0b6932 JB |
715 | int dlen = strlen (data); |
716 | if (dlen + sblen >= SEND_BUFFER_SIZE) | |
717 | { | |
718 | int part = SEND_BUFFER_SIZE - sblen; | |
719 | strncpy (&send_buffer[sblen], data, part); | |
720 | data += part; | |
721 | sblen = SEND_BUFFER_SIZE; | |
722 | } | |
723 | else if (dlen) | |
724 | { | |
725 | strcpy (&send_buffer[sblen], data); | |
726 | data = NULL; | |
727 | sblen += dlen; | |
728 | } | |
729 | else | |
730 | break; | |
731 | ||
732 | if (sblen == SEND_BUFFER_SIZE | |
733 | || (sblen > 0 && send_buffer[sblen-1] == '\n')) | |
734 | { | |
735 | int sent = send (s, send_buffer, sblen, 0); | |
736 | if (sent != sblen) | |
737 | strcpy (send_buffer, &send_buffer[sent]); | |
738 | sblen -= sent; | |
739 | } | |
2828d5f9 | 740 | } |
2828d5f9 | 741 | } |
2828d5f9 KL |
742 | |
743 | \f | |
0b0d3e0b | 744 | /* In STR, insert a & before each &, each space, each newline, and |
a4cf2096 | 745 | any initial -. Change spaces to underscores, too, so that the |
0b0d3e0b KL |
746 | return value never contains a space. |
747 | ||
748 | Does not change the string. Outputs the result to STREAM. */ | |
87209357 | 749 | void |
974b73e8 | 750 | quote_argument (s, str) |
aa0b6932 | 751 | HSOCKET s; |
0b0d3e0b | 752 | char *str; |
5212210c | 753 | { |
9002956f | 754 | char *copy = (char *) xmalloc (strlen (str) * 2 + 1); |
5212210c RS |
755 | char *p, *q; |
756 | ||
0b0d3e0b | 757 | p = str; |
5212210c RS |
758 | q = copy; |
759 | while (*p) | |
760 | { | |
761 | if (*p == ' ') | |
762 | { | |
f1db6a73 | 763 | *q++ = '&'; |
5212210c RS |
764 | *q++ = '_'; |
765 | p++; | |
766 | } | |
3cf8c6aa SM |
767 | else if (*p == '\n') |
768 | { | |
769 | *q++ = '&'; | |
770 | *q++ = 'n'; | |
771 | p++; | |
772 | } | |
5212210c RS |
773 | else |
774 | { | |
0b0d3e0b | 775 | if (*p == '&' || (*p == '-' && p == str)) |
f1db6a73 | 776 | *q++ = '&'; |
5212210c RS |
777 | *q++ = *p++; |
778 | } | |
779 | } | |
f1db6a73 | 780 | *q++ = 0; |
5212210c | 781 | |
486ba65f | 782 | send_to_emacs (s, copy); |
87209357 EZ |
783 | |
784 | free (copy); | |
5212210c | 785 | } |
0c76956f | 786 | |
0b0d3e0b KL |
787 | |
788 | /* The inverse of quote_argument. Removes quoting in string STR by | |
789 | modifying the string in place. Returns STR. */ | |
790 | ||
791 | char * | |
792 | unquote_argument (str) | |
793 | char *str; | |
794 | { | |
795 | char *p, *q; | |
796 | ||
797 | if (! str) | |
798 | return str; | |
799 | ||
800 | p = str; | |
801 | q = str; | |
802 | while (*p) | |
803 | { | |
804 | if (*p == '&') | |
805 | { | |
806 | p++; | |
807 | if (*p == '&') | |
808 | *p = '&'; | |
809 | else if (*p == '_') | |
810 | *p = ' '; | |
811 | else if (*p == 'n') | |
812 | *p = '\n'; | |
813 | else if (*p == '-') | |
814 | *p = '-'; | |
815 | } | |
816 | *q++ = *p++; | |
817 | } | |
818 | *q = 0; | |
819 | return str; | |
820 | } | |
821 | ||
8f9aaa0a | 822 | \f |
b03d27bd JB |
823 | int |
824 | file_name_absolute_p (filename) | |
825 | const unsigned char *filename; | |
826 | { | |
827 | /* Sanity check, it shouldn't happen. */ | |
828 | if (! filename) return FALSE; | |
829 | ||
830 | /* /xxx is always an absolute path. */ | |
831 | if (filename[0] == '/') return TRUE; | |
832 | ||
833 | /* Empty filenames (which shouldn't happen) are relative. */ | |
834 | if (filename[0] == '\0') return FALSE; | |
835 | ||
836 | #ifdef WINDOWSNT | |
71b8f735 | 837 | /* X:\xxx is always absolute. */ |
5f7a4874 | 838 | if (isalpha (filename[0]) |
cb0297bb | 839 | && filename[1] == ':' && (filename[2] == '\\' || filename[2] == '/')) |
b03d27bd JB |
840 | return TRUE; |
841 | ||
842 | /* Both \xxx and \\xxx\yyy are absolute. */ | |
843 | if (filename[0] == '\\') return TRUE; | |
844 | #endif | |
845 | ||
846 | return FALSE; | |
847 | } | |
848 | ||
aa0b6932 | 849 | #ifdef WINDOWSNT |
f0384499 | 850 | /* Wrapper to make WSACleanup a cdecl, as required by atexit. */ |
b03d27bd JB |
851 | void |
852 | __cdecl close_winsock () | |
aa0b6932 JB |
853 | { |
854 | WSACleanup (); | |
855 | } | |
0c76956f | 856 | |
b03d27bd JB |
857 | /* Initialize the WinSock2 library. */ |
858 | void | |
859 | initialize_sockets () | |
0c76956f | 860 | { |
aa0b6932 JB |
861 | WSADATA wsaData; |
862 | ||
aa0b6932 JB |
863 | if (WSAStartup (MAKEWORD (2, 0), &wsaData)) |
864 | { | |
78da39c6 | 865 | message (TRUE, "%s: error initializing WinSock2\n", progname); |
aa0b6932 JB |
866 | exit (EXIT_FAILURE); |
867 | } | |
868 | ||
869 | atexit (close_winsock); | |
0c76956f | 870 | } |
e35fc962 | 871 | #endif /* WINDOWSNT */ |
974b73e8 | 872 | |
8f9aaa0a | 873 | \f |
97e3214d | 874 | /* |
aa0b6932 | 875 | * Read the information needed to set up a TCP comm channel with |
434a6c5d | 876 | * the Emacs server: host, port, pid and authentication string. |
0e0dced5 | 877 | */ |
b03d27bd JB |
878 | int |
879 | get_server_config (server, authentication) | |
aa0b6932 JB |
880 | struct sockaddr_in *server; |
881 | char *authentication; | |
97e3214d | 882 | { |
aa0b6932 JB |
883 | char dotted[32]; |
884 | char *port; | |
434a6c5d | 885 | char *pid; |
b03d27bd | 886 | FILE *config = NULL; |
aa0b6932 | 887 | |
b03d27bd JB |
888 | if (file_name_absolute_p (server_file)) |
889 | config = fopen (server_file, "rb"); | |
890 | else | |
97e3214d | 891 | { |
7ce8671d | 892 | char *home = egetenv ("HOME"); |
88b46d84 | 893 | |
aa0b6932 JB |
894 | if (home) |
895 | { | |
bc558f3e JB |
896 | char *path = alloca (strlen (home) + strlen (server_file) |
897 | + EXTRA_SPACE); | |
aa0b6932 JB |
898 | sprintf (path, "%s/.emacs.d/server/%s", home, server_file); |
899 | config = fopen (path, "rb"); | |
900 | } | |
88b46d84 | 901 | #ifdef WINDOWSNT |
7ce8671d | 902 | if (!config && (home = egetenv ("APPDATA"))) |
88b46d84 | 903 | { |
bc558f3e JB |
904 | char *path = alloca (strlen (home) + strlen (server_file) |
905 | + EXTRA_SPACE); | |
88b46d84 JB |
906 | sprintf (path, "%s/.emacs.d/server/%s", home, server_file); |
907 | config = fopen (path, "rb"); | |
908 | } | |
909 | #endif | |
aa0b6932 JB |
910 | } |
911 | ||
912 | if (! config) | |
913 | return FALSE; | |
914 | ||
915 | if (fgets (dotted, sizeof dotted, config) | |
434a6c5d JB |
916 | && (port = strchr (dotted, ':')) |
917 | && (pid = strchr (port, ' '))) | |
aa0b6932 JB |
918 | { |
919 | *port++ = '\0'; | |
434a6c5d | 920 | *pid++ = '\0'; |
97e3214d GM |
921 | } |
922 | else | |
923 | { | |
78da39c6 | 924 | message (TRUE, "%s: invalid configuration info\n", progname); |
65396510 | 925 | exit (EXIT_FAILURE); |
97e3214d | 926 | } |
97e3214d | 927 | |
aa0b6932 JB |
928 | server->sin_family = AF_INET; |
929 | server->sin_addr.s_addr = inet_addr (dotted); | |
930 | server->sin_port = htons (atoi (port)); | |
97e3214d | 931 | |
aa0b6932 JB |
932 | if (! fread (authentication, AUTH_KEY_LENGTH, 1, config)) |
933 | { | |
78da39c6 | 934 | message (TRUE, "%s: cannot read authentication info\n", progname); |
aa0b6932 JB |
935 | exit (EXIT_FAILURE); |
936 | } | |
46cec291 | 937 | |
aa0b6932 | 938 | fclose (config); |
97e3214d | 939 | |
c66648e0 | 940 | emacs_pid = atoi (pid); |
434a6c5d | 941 | |
aa0b6932 | 942 | return TRUE; |
97e3214d GM |
943 | } |
944 | ||
aa0b6932 JB |
945 | HSOCKET |
946 | set_tcp_socket () | |
947 | { | |
948 | HSOCKET s; | |
949 | struct sockaddr_in server; | |
aa0b6932 JB |
950 | struct linger l_arg = {1, 1}; |
951 | char auth_string[AUTH_KEY_LENGTH + 1]; | |
9628b887 | 952 | |
aa0b6932 JB |
953 | if (! get_server_config (&server, auth_string)) |
954 | return INVALID_SOCKET; | |
955 | ||
b03d27bd | 956 | if (server.sin_addr.s_addr != inet_addr ("127.0.0.1")) |
9219db75 | 957 | message (FALSE, "%s: connected to remote socket at %s\n", |
b03d27bd JB |
958 | progname, inet_ntoa (server.sin_addr)); |
959 | ||
aa0b6932 JB |
960 | /* |
961 | * Open up an AF_INET socket | |
962 | */ | |
963 | if ((s = socket (AF_INET, SOCK_STREAM, IPPROTO_TCP)) < 0) | |
964 | { | |
d22b00e5 | 965 | sock_err_message ("socket"); |
aa0b6932 JB |
966 | return INVALID_SOCKET; |
967 | } | |
968 | ||
969 | /* | |
970 | * Set up the socket | |
971 | */ | |
972 | if (connect (s, (struct sockaddr *) &server, sizeof server) < 0) | |
973 | { | |
d22b00e5 | 974 | sock_err_message ("connect"); |
aa0b6932 JB |
975 | return INVALID_SOCKET; |
976 | } | |
977 | ||
aa0b6932 JB |
978 | setsockopt (s, SOL_SOCKET, SO_LINGER, (char *) &l_arg, sizeof l_arg); |
979 | ||
980 | /* | |
981 | * Send the authentication | |
982 | */ | |
983 | auth_string[AUTH_KEY_LENGTH] = '\0'; | |
984 | ||
486ba65f JR |
985 | send_to_emacs (s, "-auth "); |
986 | send_to_emacs (s, auth_string); | |
5ab73228 | 987 | send_to_emacs (s, " "); |
aa0b6932 JB |
988 | |
989 | return s; | |
990 | } | |
991 | ||
b2ff54a0 JR |
992 | |
993 | /* Returns 1 if PREFIX is a prefix of STRING. */ | |
994 | static int | |
995 | strprefix (char *prefix, char *string) | |
996 | { | |
cb06b8dc | 997 | return !strncmp (prefix, string, strlen (prefix)); |
b2ff54a0 JR |
998 | } |
999 | ||
a336ee5b CY |
1000 | /* Get tty name and type. If successful, return the type in TTY_TYPE |
1001 | and the name in TTY_NAME, and return 1. Otherwise, fail if NOABORT | |
1002 | is zero, or return 0 if NOABORT is non-zero. */ | |
1003 | ||
1004 | int | |
1005 | find_tty (char **tty_type, char **tty_name, int noabort) | |
1006 | { | |
1007 | char *type = egetenv ("TERM"); | |
1008 | char *name = ttyname (fileno (stdout)); | |
1009 | ||
1010 | if (!name) | |
1011 | { | |
1012 | if (noabort) | |
1013 | return 0; | |
1014 | else | |
1015 | { | |
1016 | message (TRUE, "%s: could not get terminal name\n", progname); | |
1017 | fail (); | |
1018 | } | |
1019 | } | |
1020 | ||
1021 | if (!type) | |
1022 | { | |
1023 | if (noabort) | |
1024 | return 0; | |
1025 | else | |
1026 | { | |
1027 | message (TRUE, "%s: please set the TERM variable to your terminal type\n", | |
1028 | progname); | |
1029 | fail (); | |
1030 | } | |
1031 | } | |
1032 | ||
1033 | if (strcmp (type, "eterm") == 0) | |
1034 | { | |
1035 | if (noabort) | |
1036 | return 0; | |
1037 | else | |
1038 | { | |
1039 | /* This causes nasty, MULTI_KBOARD-related input lockouts. */ | |
1040 | message (TRUE, "%s: opening a frame in an Emacs term buffer" | |
1041 | " is not supported\n", progname); | |
1042 | fail (); | |
1043 | } | |
1044 | } | |
1045 | ||
1046 | *tty_name = name; | |
1047 | *tty_type = type; | |
1048 | return 1; | |
1049 | } | |
1050 | ||
b2ff54a0 | 1051 | |
aa0b6932 | 1052 | #if !defined (NO_SOCKETS_IN_FILE_SYSTEM) |
46cec291 | 1053 | |
9f637eea GM |
1054 | /* Three possibilities: |
1055 | 2 - can't be `stat'ed (sets errno) | |
1056 | 1 - isn't owned by us | |
1057 | 0 - success: none of the above */ | |
1058 | ||
1059 | static int | |
1060 | socket_status (socket_name) | |
1061 | char *socket_name; | |
1062 | { | |
1063 | struct stat statbfr; | |
1064 | ||
1065 | if (stat (socket_name, &statbfr) == -1) | |
1066 | return 2; | |
1067 | ||
1068 | if (statbfr.st_uid != geteuid ()) | |
1069 | return 1; | |
0b0d3e0b | 1070 | |
9f637eea GM |
1071 | return 0; |
1072 | } | |
1073 | ||
974b73e8 | 1074 | \f |
da8e1115 KL |
1075 | /* A signal handler that passes the signal to the Emacs process. |
1076 | Useful for SIGWINCH. */ | |
1077 | ||
9628b887 | 1078 | SIGTYPE |
428a555e | 1079 | pass_signal_to_emacs (int signalnum) |
9628b887 KL |
1080 | { |
1081 | int old_errno = errno; | |
1082 | ||
9f729af5 | 1083 | if (emacs_pid) |
428a555e | 1084 | kill (emacs_pid, signalnum); |
9f729af5 | 1085 | |
428a555e | 1086 | signal (signalnum, pass_signal_to_emacs); |
9f729af5 KL |
1087 | errno = old_errno; |
1088 | } | |
1089 | ||
0b0d3e0b KL |
1090 | /* Signal handler for SIGCONT; notify the Emacs process that it can |
1091 | now resume our tty frame. */ | |
1092 | ||
1093 | SIGTYPE | |
1094 | handle_sigcont (int signalnum) | |
1095 | { | |
1096 | int old_errno = errno; | |
1097 | ||
1098 | if (tcgetpgrp (1) == getpgrp ()) | |
1099 | { | |
1100 | /* We are in the foreground. */ | |
486ba65f | 1101 | send_to_emacs (emacs_socket, "-resume \n"); |
0b0d3e0b KL |
1102 | } |
1103 | else | |
1104 | { | |
1105 | /* We are in the background; cancel the continue. */ | |
1106 | kill (getpid (), SIGSTOP); | |
1107 | } | |
c6c53c3e KL |
1108 | |
1109 | signal (signalnum, handle_sigcont); | |
0b0d3e0b KL |
1110 | errno = old_errno; |
1111 | } | |
1112 | ||
1113 | /* Signal handler for SIGTSTP; notify the Emacs process that we are | |
1114 | going to sleep. Normally the suspend is initiated by Emacs via | |
1115 | server-handle-suspend-tty, but if the server gets out of sync with | |
1116 | reality, we may get a SIGTSTP on C-z. Handling this signal and | |
1117 | notifying Emacs about it should get things under control again. */ | |
1118 | ||
1119 | SIGTYPE | |
1120 | handle_sigtstp (int signalnum) | |
1121 | { | |
1122 | int old_errno = errno; | |
1123 | sigset_t set; | |
c0f342ab | 1124 | |
90843190 | 1125 | if (emacs_socket) |
486ba65f | 1126 | send_to_emacs (emacs_socket, "-suspend \n"); |
0b0d3e0b | 1127 | |
5ab73228 | 1128 | /* Unblock this signal and call the default handler by temporarily |
0b0d3e0b KL |
1129 | changing the handler and resignalling. */ |
1130 | sigprocmask (SIG_BLOCK, NULL, &set); | |
1131 | sigdelset (&set, signalnum); | |
1132 | signal (signalnum, SIG_DFL); | |
1133 | kill (getpid (), signalnum); | |
1134 | sigprocmask (SIG_SETMASK, &set, NULL); /* Let's the above signal through. */ | |
1135 | signal (signalnum, handle_sigtstp); | |
1136 | ||
1137 | errno = old_errno; | |
1138 | } | |
273b9028 CY |
1139 | |
1140 | ||
da8e1115 | 1141 | /* Set up signal handlers before opening a frame on the current tty. */ |
0b0d3e0b | 1142 | |
4d553a13 KL |
1143 | void |
1144 | init_signals (void) | |
9628b887 KL |
1145 | { |
1146 | /* Set up signal handlers. */ | |
428a555e | 1147 | signal (SIGWINCH, pass_signal_to_emacs); |
4ca927b4 KL |
1148 | |
1149 | /* Don't pass SIGINT and SIGQUIT to Emacs, because it has no way of | |
1150 | deciding which terminal the signal came from. C-g is now a | |
1151 | normal input event on secondary terminals. */ | |
1152 | #if 0 | |
428a555e KL |
1153 | signal (SIGINT, pass_signal_to_emacs); |
1154 | signal (SIGQUIT, pass_signal_to_emacs); | |
4ca927b4 | 1155 | #endif |
0b0d3e0b KL |
1156 | |
1157 | signal (SIGCONT, handle_sigcont); | |
1158 | signal (SIGTSTP, handle_sigtstp); | |
1159 | signal (SIGTTOU, handle_sigtstp); | |
9628b887 KL |
1160 | } |
1161 | ||
46cec291 | 1162 | |
aa0b6932 JB |
1163 | HSOCKET |
1164 | set_local_socket () | |
46cec291 | 1165 | { |
aa0b6932 | 1166 | HSOCKET s; |
46cec291 | 1167 | struct sockaddr_un server; |
46cec291 | 1168 | |
e69233c2 | 1169 | /* |
46cec291 RS |
1170 | * Open up an AF_UNIX socket in this person's home directory |
1171 | */ | |
1172 | ||
1173 | if ((s = socket (AF_UNIX, SOCK_STREAM, 0)) < 0) | |
1174 | { | |
42073bfb | 1175 | message (TRUE, "%s: socket: %s\n", progname, strerror (errno)); |
aa0b6932 | 1176 | return INVALID_SOCKET; |
46cec291 | 1177 | } |
e69233c2 | 1178 | |
46cec291 | 1179 | server.sun_family = AF_UNIX; |
c5fee545 | 1180 | |
c5fee545 | 1181 | { |
9f637eea | 1182 | int sock_status = 0; |
5c9659d3 | 1183 | int default_sock = !socket_name; |
b80bf66e | 1184 | int saved_errno = 0; |
0734b0d0 | 1185 | char *server_name = "server"; |
f77b11a0 | 1186 | char *tmpdir; |
0b0d3e0b | 1187 | |
0734b0d0 SM |
1188 | if (socket_name && !index (socket_name, '/') && !index (socket_name, '\\')) |
1189 | { /* socket_name is a file name component. */ | |
d3a6748c KL |
1190 | server_name = socket_name; |
1191 | socket_name = NULL; | |
1192 | default_sock = 1; /* Try both UIDs. */ | |
0734b0d0 | 1193 | } |
efb859b4 | 1194 | |
5c9659d3 | 1195 | if (default_sock) |
254107e4 | 1196 | { |
f77b11a0 JB |
1197 | tmpdir = egetenv ("TMPDIR"); |
1198 | if (!tmpdir) | |
1199 | tmpdir = "/tmp"; | |
bc558f3e JB |
1200 | socket_name = alloca (strlen (tmpdir) + strlen (server_name) |
1201 | + EXTRA_SPACE); | |
f77b11a0 JB |
1202 | sprintf (socket_name, "%s/emacs%d/%s", |
1203 | tmpdir, (int) geteuid (), server_name); | |
254107e4 RS |
1204 | } |
1205 | ||
1206 | if (strlen (socket_name) < sizeof (server.sun_path)) | |
1207 | strcpy (server.sun_path, socket_name); | |
1208 | else | |
819b8f00 | 1209 | { |
78da39c6 | 1210 | message (TRUE, "%s: socket-name %s too long\n", |
974b73e8 | 1211 | progname, socket_name); |
819b8f00 KL |
1212 | fail (); |
1213 | } | |
efb859b4 | 1214 | |
9f637eea GM |
1215 | /* See if the socket exists, and if it's owned by us. */ |
1216 | sock_status = socket_status (server.sun_path); | |
152b6e83 | 1217 | saved_errno = errno; |
5c9659d3 | 1218 | if (sock_status && default_sock) |
efb859b4 | 1219 | { |
9f637eea GM |
1220 | /* Failing that, see if LOGNAME or USER exist and differ from |
1221 | our euid. If so, look for a socket based on the UID | |
1222 | associated with the name. This is reminiscent of the logic | |
1223 | that init_editfns uses to set the global Vuser_full_name. */ | |
e69233c2 | 1224 | |
7ce8671d | 1225 | char *user_name = (char *) egetenv ("LOGNAME"); |
293f9f2a | 1226 | |
9f637eea | 1227 | if (!user_name) |
7ce8671d | 1228 | user_name = (char *) egetenv ("USER"); |
e69233c2 | 1229 | |
9f637eea GM |
1230 | if (user_name) |
1231 | { | |
1232 | struct passwd *pw = getpwnam (user_name); | |
293f9f2a | 1233 | |
9f637eea GM |
1234 | if (pw && (pw->pw_uid != geteuid ())) |
1235 | { | |
1236 | /* We're running under su, apparently. */ | |
bc558f3e JB |
1237 | socket_name = alloca (strlen (tmpdir) + strlen (server_name) |
1238 | + EXTRA_SPACE); | |
f77b11a0 JB |
1239 | sprintf (socket_name, "%s/emacs%d/%s", |
1240 | tmpdir, (int) pw->pw_uid, server_name); | |
5c9659d3 SM |
1241 | |
1242 | if (strlen (socket_name) < sizeof (server.sun_path)) | |
1243 | strcpy (server.sun_path, socket_name); | |
1244 | else | |
1245 | { | |
78da39c6 | 1246 | message (TRUE, "%s: socket-name %s too long\n", |
aa0b6932 | 1247 | progname, socket_name); |
65396510 | 1248 | exit (EXIT_FAILURE); |
5c9659d3 SM |
1249 | } |
1250 | ||
9f637eea | 1251 | sock_status = socket_status (server.sun_path); |
b80bf66e | 1252 | saved_errno = errno; |
9f637eea | 1253 | } |
293f9f2a RS |
1254 | else |
1255 | errno = saved_errno; | |
9f637eea | 1256 | } |
efb859b4 | 1257 | } |
e69233c2 | 1258 | |
aa0b6932 JB |
1259 | switch (sock_status) |
1260 | { | |
1261 | case 1: | |
974b73e8 KL |
1262 | /* There's a socket, but it isn't owned by us. This is OK if |
1263 | we are root. */ | |
1264 | if (0 != geteuid ()) | |
1265 | { | |
1266 | message (TRUE, "%s: Invalid socket owner\n", progname); | |
aa0b6932 | 1267 | return INVALID_SOCKET; |
974b73e8 KL |
1268 | } |
1269 | break; | |
aa0b6932 JB |
1270 | |
1271 | case 2: | |
974b73e8 KL |
1272 | /* `stat' failed */ |
1273 | if (saved_errno == ENOENT) | |
1274 | message (TRUE, | |
1275 | "%s: can't find socket; have you started the server?\n\ | |
45adde32 | 1276 | To start the server in Emacs, type \"M-x server-start\".\n", |
aa0b6932 | 1277 | progname); |
974b73e8 KL |
1278 | else |
1279 | message (TRUE, "%s: can't stat %s: %s\n", | |
aa0b6932 | 1280 | progname, server.sun_path, strerror (saved_errno)); |
974b73e8 | 1281 | return INVALID_SOCKET; |
aa0b6932 | 1282 | } |
efb859b4 | 1283 | } |
46cec291 | 1284 | |
4e23f2ba JB |
1285 | if (connect (s, (struct sockaddr *) &server, strlen (server.sun_path) + 2) |
1286 | < 0) | |
46cec291 | 1287 | { |
42073bfb | 1288 | message (TRUE, "%s: connect: %s\n", progname, strerror (errno)); |
aa0b6932 | 1289 | return INVALID_SOCKET; |
46cec291 | 1290 | } |
23a7488d | 1291 | |
aa0b6932 JB |
1292 | return s; |
1293 | } | |
1294 | #endif /* ! NO_SOCKETS_IN_FILE_SYSTEM */ | |
1295 | ||
1296 | HSOCKET | |
1297 | set_socket () | |
1298 | { | |
b03d27bd | 1299 | HSOCKET s; |
c0f342ab | 1300 | |
b03d27bd | 1301 | INITIALIZE (); |
c0f342ab | 1302 | |
aa0b6932 | 1303 | #ifndef NO_SOCKETS_IN_FILE_SYSTEM |
b03d27bd JB |
1304 | /* Explicit --socket-name argument. */ |
1305 | if (socket_name) | |
46cec291 | 1306 | { |
b03d27bd JB |
1307 | s = set_local_socket (); |
1308 | if ((s != INVALID_SOCKET) || alternate_editor) | |
974b73e8 | 1309 | return s; |
355a326e | 1310 | message (TRUE, "%s: error accessing socket \"%s\"\n", |
974b73e8 | 1311 | progname, socket_name); |
b03d27bd | 1312 | exit (EXIT_FAILURE); |
46cec291 | 1313 | } |
b03d27bd JB |
1314 | #endif |
1315 | ||
1316 | /* Explicit --server-file arg or EMACS_SERVER_FILE variable. */ | |
1317 | if (!server_file) | |
7ce8671d | 1318 | server_file = egetenv ("EMACS_SERVER_FILE"); |
46cec291 | 1319 | |
b03d27bd | 1320 | if (server_file) |
23a7488d | 1321 | { |
b03d27bd JB |
1322 | s = set_tcp_socket (); |
1323 | if ((s != INVALID_SOCKET) || alternate_editor) | |
974b73e8 | 1324 | return s; |
c0f342ab | 1325 | |
78da39c6 | 1326 | message (TRUE, "%s: error accessing server file \"%s\"\n", |
974b73e8 | 1327 | progname, server_file); |
b03d27bd | 1328 | exit (EXIT_FAILURE); |
23a7488d | 1329 | } |
c0f342ab | 1330 | |
b03d27bd JB |
1331 | #ifndef NO_SOCKETS_IN_FILE_SYSTEM |
1332 | /* Implicit local socket. */ | |
1333 | s = set_local_socket (); | |
1334 | if (s != INVALID_SOCKET) | |
1335 | return s; | |
1336 | #endif | |
23a7488d | 1337 | |
b03d27bd JB |
1338 | /* Implicit server file. */ |
1339 | server_file = "server"; | |
1340 | s = set_tcp_socket (); | |
1341 | if ((s != INVALID_SOCKET) || alternate_editor) | |
1342 | return s; | |
1343 | ||
1344 | /* No implicit or explicit socket, and no alternate editor. */ | |
42073bfb | 1345 | message (TRUE, "%s: No socket or alternate editor. Please use:\n\n" |
b03d27bd JB |
1346 | #ifndef NO_SOCKETS_IN_FILE_SYSTEM |
1347 | "\t--socket-name\n" | |
ee6a193c | 1348 | #endif |
b03d27bd JB |
1349 | "\t--server-file (or environment variable EMACS_SERVER_FILE)\n\ |
1350 | \t--alternate-editor (or environment variable ALTERNATE_EDITOR)\n", | |
1351 | progname); | |
1352 | exit (EXIT_FAILURE); | |
aa0b6932 | 1353 | } |
46cec291 | 1354 | |
0e0dced5 JB |
1355 | #ifdef WINDOWSNT |
1356 | FARPROC set_fg; /* Pointer to AllowSetForegroundWindow. */ | |
1357 | FARPROC get_wc; /* Pointer to RealGetWindowClassA. */ | |
1358 | ||
1359 | BOOL CALLBACK | |
1360 | w32_find_emacs_process (hWnd, lParam) | |
1361 | HWND hWnd; | |
1362 | LPARAM lParam; | |
1363 | { | |
1364 | DWORD pid; | |
1365 | char class[6]; | |
1366 | ||
1367 | /* Reject any window not of class "Emacs". */ | |
1368 | if (! get_wc (hWnd, class, sizeof (class)) | |
1369 | || strcmp (class, "Emacs")) | |
1370 | return TRUE; | |
1371 | ||
1372 | /* We only need the process id, not the thread id. */ | |
1373 | (void) GetWindowThreadProcessId (hWnd, &pid); | |
1374 | ||
1375 | /* Not the one we're looking for. */ | |
1376 | if (pid != (DWORD) emacs_pid) return TRUE; | |
1377 | ||
1378 | /* OK, let's raise it. */ | |
1379 | set_fg (emacs_pid); | |
1380 | ||
1381 | /* Stop enumeration. */ | |
1382 | return FALSE; | |
1383 | } | |
1384 | ||
1385 | /* | |
1386 | * Search for a window of class "Emacs" and owned by a process with | |
1387 | * process id = emacs_pid. If found, allow it to grab the focus. | |
1388 | */ | |
1389 | void | |
1390 | w32_give_focus () | |
1391 | { | |
1392 | HMODULE hUser32; | |
1393 | ||
71b8f735 | 1394 | /* It shouldn't happen when dealing with TCP sockets. */ |
0e0dced5 JB |
1395 | if (!emacs_pid) return; |
1396 | ||
1397 | if (!(hUser32 = LoadLibrary ("user32.dll"))) return; | |
1398 | ||
1399 | /* Modern Windows restrict which processes can set the foreground window. | |
1400 | emacsclient can allow Emacs to grab the focus by calling the function | |
1401 | AllowSetForegroundWindow. Unfortunately, older Windows (W95, W98 and | |
1402 | NT) lack this function, so we have to check its availability. */ | |
1403 | if ((set_fg = GetProcAddress (hUser32, "AllowSetForegroundWindow")) | |
1404 | && (get_wc = GetProcAddress (hUser32, "RealGetWindowClassA"))) | |
1405 | EnumWindows (w32_find_emacs_process, (LPARAM) 0); | |
1406 | ||
1407 | FreeLibrary (hUser32); | |
1408 | } | |
1409 | #endif | |
1410 | ||
aa0b6932 JB |
1411 | int |
1412 | main (argc, argv) | |
1413 | int argc; | |
1414 | char **argv; | |
1415 | { | |
aa0b6932 | 1416 | int i, rl, needlf = 0; |
974b73e8 | 1417 | char *cwd, *str; |
aa0b6932 JB |
1418 | char string[BUFSIZ+1]; |
1419 | ||
974b73e8 | 1420 | main_argv = argv; |
aa0b6932 JB |
1421 | progname = argv[0]; |
1422 | ||
1423 | /* Process options. */ | |
1424 | decode_options (argc, argv); | |
1425 | ||
273b9028 | 1426 | if ((argc - optind < 1) && !eval && current_frame) |
23a7488d | 1427 | { |
974b73e8 KL |
1428 | message (TRUE, "%s: file name or argument required\n" |
1429 | "Try `%s --help' for more information\n", | |
1430 | progname, progname); | |
aa0b6932 | 1431 | exit (EXIT_FAILURE); |
23a7488d RS |
1432 | } |
1433 | ||
4b7b77f6 | 1434 | if ((emacs_socket = set_socket ()) == INVALID_SOCKET) |
974b73e8 | 1435 | fail (); |
aa0b6932 | 1436 | |
974b73e8 KL |
1437 | |
1438 | cwd = get_current_dir_name (); | |
46cec291 RS |
1439 | if (cwd == 0) |
1440 | { | |
1441 | /* getwd puts message in STRING if it fails. */ | |
974b73e8 KL |
1442 | message (TRUE, "%s: %s\n", progname, |
1443 | "Cannot get current working directory"); | |
819b8f00 | 1444 | fail (); |
46cec291 RS |
1445 | } |
1446 | ||
c66648e0 | 1447 | #ifdef WINDOWSNT |
0e0dced5 | 1448 | w32_give_focus (); |
c66648e0 JB |
1449 | #endif |
1450 | ||
273b9028 | 1451 | /* Send over our environment and current directory. */ |
59e085e0 KL |
1452 | if (!current_frame) |
1453 | { | |
1454 | extern char **environ; | |
1455 | int i; | |
1456 | for (i = 0; environ[i]; i++) | |
1457 | { | |
1458 | char *name = xstrdup (environ[i]); | |
1459 | char *value = strchr (name, '='); | |
486ba65f JR |
1460 | send_to_emacs (emacs_socket, "-env "); |
1461 | quote_argument (emacs_socket, environ[i]); | |
1462 | send_to_emacs (emacs_socket, " "); | |
59e085e0 | 1463 | } |
486ba65f JR |
1464 | send_to_emacs (emacs_socket, "-dir "); |
1465 | quote_argument (emacs_socket, cwd); | |
1466 | send_to_emacs (emacs_socket, "/"); | |
1467 | send_to_emacs (emacs_socket, " "); | |
2828d5f9 KL |
1468 | } |
1469 | ||
6afdd335 | 1470 | retry: |
5212210c | 1471 | if (nowait) |
486ba65f | 1472 | send_to_emacs (emacs_socket, "-nowait "); |
292d74a3 | 1473 | |
92071250 | 1474 | if (current_frame) |
486ba65f | 1475 | send_to_emacs (emacs_socket, "-current-frame "); |
c0f342ab | 1476 | |
30be2360 | 1477 | if (display) |
87209357 | 1478 | { |
486ba65f JR |
1479 | send_to_emacs (emacs_socket, "-display "); |
1480 | quote_argument (emacs_socket, display); | |
1481 | send_to_emacs (emacs_socket, " "); | |
87209357 | 1482 | } |
30be2360 | 1483 | |
8536c0f5 CY |
1484 | /* If using the current frame, send tty information to Emacs anyway. |
1485 | In daemon mode, Emacs may need to occupy this tty if no other | |
1486 | frame is available. */ | |
322ca650 | 1487 | if (tty || (current_frame && !eval)) |
9628b887 | 1488 | { |
273b9028 | 1489 | char *tty_type, *tty_name; |
0b0d3e0b | 1490 | |
273b9028 CY |
1491 | if (find_tty (&tty_type, &tty_name, !tty)) |
1492 | { | |
b2ff54a0 | 1493 | #if !defined (NO_SOCKETS_IN_FILE_SYSTEM) |
273b9028 | 1494 | init_signals (); |
b2ff54a0 | 1495 | #endif |
273b9028 CY |
1496 | send_to_emacs (emacs_socket, "-tty "); |
1497 | quote_argument (emacs_socket, tty_name); | |
1498 | send_to_emacs (emacs_socket, " "); | |
1499 | quote_argument (emacs_socket, tty_type); | |
1500 | send_to_emacs (emacs_socket, " "); | |
1501 | } | |
9628b887 | 1502 | } |
77134727 | 1503 | |
273b9028 | 1504 | if (!current_frame && !tty) |
486ba65f | 1505 | send_to_emacs (emacs_socket, "-window-system "); |
0b0d3e0b | 1506 | |
87209357 | 1507 | if ((argc - optind > 0)) |
5212210c | 1508 | { |
87209357 | 1509 | for (i = optind; i < argc; i++) |
46cec291 | 1510 | { |
0b0d3e0b KL |
1511 | int relative = 0; |
1512 | ||
87209357 | 1513 | if (eval) |
0b0d3e0b | 1514 | { |
974b73e8 | 1515 | /* Don't prepend cwd or anything like that. */ |
486ba65f JR |
1516 | send_to_emacs (emacs_socket, "-eval "); |
1517 | quote_argument (emacs_socket, argv[i]); | |
1518 | send_to_emacs (emacs_socket, " "); | |
0b0d3e0b KL |
1519 | continue; |
1520 | } | |
1521 | ||
1522 | if (*argv[i] == '+') | |
1523 | { | |
87209357 EZ |
1524 | char *p = argv[i] + 1; |
1525 | while (isdigit ((unsigned char) *p) || *p == ':') p++; | |
0b0d3e0b KL |
1526 | if (*p == 0) |
1527 | { | |
486ba65f JR |
1528 | send_to_emacs (emacs_socket, "-position "); |
1529 | quote_argument (emacs_socket, argv[i]); | |
1530 | send_to_emacs (emacs_socket, " "); | |
0b0d3e0b KL |
1531 | continue; |
1532 | } | |
1533 | else | |
1534 | relative = 1; | |
1535 | } | |
50f271cb JB |
1536 | else if (! file_name_absolute_p (argv[i])) |
1537 | #ifndef WINDOWSNT | |
1538 | relative = 1; | |
1539 | #else | |
1540 | /* Call GetFullPathName so filenames of the form X:Y, where X is | |
1541 | a valid drive designator, are interpreted as drive:path, not | |
1542 | file:stream, and treated as absolute. | |
1543 | The user can still pass a file:stream if desired (for example, | |
31e25350 | 1544 | .\X:Y), but it is not very useful, as Emacs currently does a |
c966fd27 | 1545 | very bad job of dealing with NTFS streams. */ |
50f271cb JB |
1546 | { |
1547 | char *filename = (char *) xmalloc (MAX_PATH); | |
1548 | DWORD size; | |
1549 | ||
1550 | size = GetFullPathName (argv[i], MAX_PATH, filename, NULL); | |
1551 | if (size > 0 && size < MAX_PATH) | |
1552 | argv[i] = filename; | |
1553 | else | |
1554 | { | |
1555 | relative = 1; | |
1556 | free (filename); | |
1557 | } | |
1558 | } | |
1559 | #endif | |
0b0d3e0b | 1560 | |
486ba65f | 1561 | send_to_emacs (emacs_socket, "-file "); |
0b0d3e0b KL |
1562 | if (relative) |
1563 | { | |
486ba65f JR |
1564 | quote_argument (emacs_socket, cwd); |
1565 | send_to_emacs (emacs_socket, "/"); | |
0b0d3e0b | 1566 | } |
486ba65f JR |
1567 | quote_argument (emacs_socket, argv[i]); |
1568 | send_to_emacs (emacs_socket, " "); | |
0b0d3e0b | 1569 | } |
46cec291 | 1570 | } |
273b9028 | 1571 | else if (eval) |
87209357 | 1572 | { |
273b9028 CY |
1573 | /* Read expressions interactively. */ |
1574 | while ((str = fgets (string, BUFSIZ, stdin))) | |
1575 | { | |
1576 | send_to_emacs (emacs_socket, "-eval "); | |
1577 | quote_argument (emacs_socket, str); | |
1578 | } | |
1579 | send_to_emacs (emacs_socket, " "); | |
87209357 | 1580 | } |
0b0d3e0b | 1581 | |
486ba65f | 1582 | send_to_emacs (emacs_socket, "\n"); |
46cec291 | 1583 | |
fc2040c0 KL |
1584 | /* Wait for an answer. */ |
1585 | if (!eval && !tty && !nowait) | |
30be2360 SM |
1586 | { |
1587 | printf ("Waiting for Emacs..."); | |
1588 | needlf = 2; | |
1589 | } | |
46cec291 | 1590 | fflush (stdout); |
0b0d3e0b | 1591 | fsync (1); |
46cec291 | 1592 | |
3cf8c6aa | 1593 | /* Now, wait for an answer and print any messages. */ |
4b7b77f6 | 1594 | while ((rl = recv (emacs_socket, string, BUFSIZ, 0)) > 0) |
3cf8c6aa | 1595 | { |
974b73e8 KL |
1596 | char *p; |
1597 | string[rl] = '\0'; | |
1598 | ||
1599 | p = string + strlen (string) - 1; | |
1600 | while (p > string && *p == '\n') | |
0b0d3e0b KL |
1601 | *p-- = 0; |
1602 | ||
31fa6595 | 1603 | if (strprefix ("-emacs-pid ", string)) |
4d553a13 | 1604 | { |
6afdd335 | 1605 | /* -emacs-pid PID: The process id of the Emacs process. */ |
77134727 KL |
1606 | emacs_pid = strtol (string + strlen ("-emacs-pid"), NULL, 10); |
1607 | } | |
974b73e8 | 1608 | else if (strprefix ("-window-system-unsupported ", string)) |
6afdd335 KL |
1609 | { |
1610 | /* -window-system-unsupported: Emacs was compiled without X | |
1611 | support. Try again on the terminal. */ | |
6afdd335 KL |
1612 | nowait = 0; |
1613 | tty = 1; | |
1614 | goto retry; | |
1615 | } | |
974b73e8 | 1616 | else if (strprefix ("-print ", string)) |
77134727 | 1617 | { |
6afdd335 | 1618 | /* -print STRING: Print STRING on the terminal. */ |
974b73e8 | 1619 | str = unquote_argument (string + strlen ("-print ")); |
0b0d3e0b | 1620 | if (needlf) |
77134727 | 1621 | printf ("\n"); |
0b0d3e0b KL |
1622 | printf ("%s", str); |
1623 | needlf = str[0] == '\0' ? needlf : str[strlen (str) - 1] != '\n'; | |
77134727 | 1624 | } |
974b73e8 | 1625 | else if (strprefix ("-error ", string)) |
77134727 | 1626 | { |
6afdd335 | 1627 | /* -error DESCRIPTION: Signal an error on the terminal. */ |
974b73e8 | 1628 | str = unquote_argument (string + strlen ("-error ")); |
0b0d3e0b KL |
1629 | if (needlf) |
1630 | printf ("\n"); | |
974b73e8 | 1631 | fprintf (stderr, "*ERROR*: %s", str); |
0b0d3e0b KL |
1632 | needlf = str[0] == '\0' ? needlf : str[strlen (str) - 1] != '\n'; |
1633 | } | |
c801ad51 | 1634 | #ifdef SIGSTOP |
382707ec | 1635 | else if (strprefix ("-suspend ", string)) |
0b0d3e0b | 1636 | { |
6afdd335 | 1637 | /* -suspend: Suspend this terminal, i.e., stop the process. */ |
0b0d3e0b | 1638 | if (needlf) |
77134727 | 1639 | printf ("\n"); |
0b0d3e0b KL |
1640 | needlf = 0; |
1641 | kill (0, SIGSTOP); | |
4d553a13 | 1642 | } |
b2ff54a0 | 1643 | #endif |
4d553a13 KL |
1644 | else |
1645 | { | |
6afdd335 | 1646 | /* Unknown command. */ |
0b0d3e0b | 1647 | if (needlf) |
4d553a13 | 1648 | printf ("\n"); |
974b73e8 KL |
1649 | printf ("*ERROR*: Unknown message: %s", string); |
1650 | needlf = string[0] == '\0' ? needlf : string[strlen (string) - 1] != '\n'; | |
4d553a13 | 1651 | } |
3cf8c6aa SM |
1652 | } |
1653 | ||
1654 | if (needlf) | |
1655 | printf ("\n"); | |
1656 | fflush (stdout); | |
0b0d3e0b | 1657 | fsync (1); |
23a7488d | 1658 | |
4b7b77f6 | 1659 | CLOSE_SOCKET (emacs_socket); |
65396510 | 1660 | return EXIT_SUCCESS; |
46cec291 RS |
1661 | } |
1662 | ||
1e7823d0 | 1663 | #endif /* HAVE_SOCKETS && HAVE_INET_SOCKETS */ |
aa0b6932 | 1664 | |
27711600 RM |
1665 | \f |
1666 | #ifndef HAVE_STRERROR | |
1667 | char * | |
1668 | strerror (errnum) | |
1669 | int errnum; | |
1670 | { | |
1671 | extern char *sys_errlist[]; | |
1672 | extern int sys_nerr; | |
1673 | ||
1674 | if (errnum >= 0 && errnum < sys_nerr) | |
1675 | return sys_errlist[errnum]; | |
1676 | return (char *) "Unknown error"; | |
1677 | } | |
1678 | ||
1679 | #endif /* ! HAVE_STRERROR */ | |
ab5796a9 MB |
1680 | |
1681 | /* arch-tag: f39bb9c4-73eb-477e-896d-50832e2ca9a7 | |
1682 | (do not change this comment) */ | |
65396510 TTN |
1683 | |
1684 | /* emacsclient.c ends here */ |