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, |
4e6835db | 3 | 2005, 2006, 2007 Free Software Foundation, Inc. |
46cec291 RS |
4 | |
5 | This file is part of GNU Emacs. | |
6 | ||
7 | GNU Emacs is free software; you can redistribute it and/or modify | |
8 | it under the terms of the GNU General Public License as published by | |
92af894f | 9 | the Free Software Foundation; either version 2, or (at your option) |
46cec291 RS |
10 | any later version. |
11 | ||
12 | GNU Emacs is distributed in the hope that it will be useful, | |
13 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
15 | GNU General Public License for more details. | |
16 | ||
17 | You should have received a copy of the GNU General Public License | |
18 | along with GNU Emacs; see the file COPYING. If not, write to | |
364c38d3 LK |
19 | the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, |
20 | Boston, MA 02110-1301, USA. */ | |
46cec291 RS |
21 | |
22 | ||
23 | #define NO_SHORTNAMES | |
e69233c2 PJ |
24 | |
25 | #ifdef HAVE_CONFIG_H | |
2f8fe2f4 | 26 | #include <config.h> |
e69233c2 PJ |
27 | #endif |
28 | ||
aa0b6932 | 29 | #ifdef WINDOWSNT |
aa0b6932 | 30 | |
bc28de71 JB |
31 | /* config.h defines these, which disables sockets altogether! */ |
32 | # undef _WINSOCKAPI_ | |
33 | # undef _WINSOCK_H | |
34 | ||
411b80a5 JB |
35 | # include <malloc.h> |
36 | # include <stdlib.h> | |
42073bfb | 37 | # include <windows.h> |
411b80a5 | 38 | |
411b80a5 JB |
39 | # define NO_SOCKETS_IN_FILE_SYSTEM |
40 | ||
aa0b6932 JB |
41 | # define HSOCKET SOCKET |
42 | # define CLOSE_SOCKET closesocket | |
aa0b6932 | 43 | # define INITIALIZE() (initialize_sockets ()) |
411b80a5 JB |
44 | |
45 | #else /* !WINDOWSNT */ | |
46 | ||
ed4a3730 JB |
47 | # include <sys/types.h> |
48 | ||
1e7823d0 JB |
49 | # ifdef HAVE_INET_SOCKETS |
50 | # include <netinet/in.h> | |
51 | # endif | |
411b80a5 | 52 | |
e35fc962 | 53 | # define INVALID_SOCKET -1 |
aa0b6932 JB |
54 | # define HSOCKET int |
55 | # define CLOSE_SOCKET close | |
aa0b6932 | 56 | # define INITIALIZE() |
411b80a5 JB |
57 | |
58 | #endif /* !WINDOWSNT */ | |
aa0b6932 | 59 | |
4e23f2ba | 60 | #undef signal |
46cec291 | 61 | |
42073bfb | 62 | #include <stdarg.h> |
e69233c2 | 63 | #include <ctype.h> |
8f9aaa0a | 64 | #include <stdio.h> |
aa0b6932 | 65 | #include "getopt.h" |
79f13bba DL |
66 | #ifdef HAVE_UNISTD_H |
67 | #include <unistd.h> | |
68 | #endif | |
8f9aaa0a | 69 | |
9f637eea GM |
70 | #ifdef VMS |
71 | # include "vms-pwd.h" | |
aa0b6932 JB |
72 | #else /* not VMS */ |
73 | #ifdef WINDOWSNT | |
74 | # include <io.h> | |
75 | #else /* not WINDOWSNT */ | |
9f637eea | 76 | # include <pwd.h> |
aa0b6932 | 77 | #endif /* not WINDOWSNT */ |
9f637eea | 78 | #endif /* not VMS */ |
dc4a4a14 | 79 | #include <sys/stat.h> |
9f637eea | 80 | |
9628b887 | 81 | #include <signal.h> |
4d553a13 | 82 | #include <errno.h> |
9628b887 | 83 | |
6bcc8ec7 KL |
84 | /* From lisp.h */ |
85 | #ifndef DIRECTORY_SEP | |
86 | #define DIRECTORY_SEP '/' | |
87 | #endif | |
88 | #ifndef IS_DIRECTORY_SEP | |
89 | #define IS_DIRECTORY_SEP(_c_) ((_c_) == DIRECTORY_SEP) | |
90 | #endif | |
91 | #ifndef IS_DEVICE_SEP | |
92 | #ifndef DEVICE_SEP | |
93 | #define IS_DEVICE_SEP(_c_) 0 | |
94 | #else | |
95 | #define IS_DEVICE_SEP(_c_) ((_c_) == DEVICE_SEP) | |
96 | #endif | |
97 | #endif | |
98 | #ifndef IS_ANY_SEP | |
99 | #define IS_ANY_SEP(_c_) (IS_DIRECTORY_SEP (_c_)) | |
100 | #endif | |
101 | ||
102 | ||
9628b887 | 103 | \f |
8f9aaa0a | 104 | char *getenv (), *getwd (); |
5b9562c3 | 105 | char *(getcwd) (); |
8f9aaa0a | 106 | |
8f9aaa0a RS |
107 | #ifndef VERSION |
108 | #define VERSION "unspecified" | |
109 | #endif | |
110 | \f | |
4b7b77f6 JR |
111 | #define SEND_STRING(data) (send_to_emacs (emacs_socket, (data))) |
112 | #define SEND_QUOTED(data) (quote_argument (emacs_socket, (data))) | |
aa0b6932 JB |
113 | |
114 | #ifndef EXIT_SUCCESS | |
115 | #define EXIT_SUCCESS 0 | |
116 | #endif | |
117 | ||
118 | #ifndef EXIT_FAILURE | |
119 | #define EXIT_FAILURE 1 | |
120 | #endif | |
121 | ||
122 | #ifndef FALSE | |
123 | #define FALSE 0 | |
124 | #endif | |
125 | ||
126 | #ifndef TRUE | |
127 | #define TRUE 1 | |
128 | #endif | |
129 | ||
130 | #ifndef NO_RETURN | |
131 | #define NO_RETURN | |
132 | #endif | |
133 | \f | |
8f9aaa0a RS |
134 | /* Name used to invoke this program. */ |
135 | char *progname; | |
136 | ||
0a125897 KL |
137 | /* The first argument to main. */ |
138 | int main_argc; | |
139 | ||
140 | /* The second argument to main. */ | |
141 | char **main_argv; | |
142 | ||
749ae770 | 143 | /* Nonzero means don't wait for a response from Emacs. --no-wait. */ |
8f9aaa0a RS |
144 | int nowait = 0; |
145 | ||
30be2360 SM |
146 | /* Nonzero means args are expressions to be evaluated. --eval. */ |
147 | int eval = 0; | |
148 | ||
92071250 KL |
149 | /* Nonzero means don't open a new frame. --current-frame. */ |
150 | int current_frame = 0; | |
151 | ||
77134727 KL |
152 | /* Nonzero means open a new graphical frame. */ |
153 | int window_system = 0; | |
154 | ||
30be2360 SM |
155 | /* The display on which Emacs should work. --display. */ |
156 | char *display = NULL; | |
157 | ||
9628b887 | 158 | /* Nonzero means open a new Emacs frame on the current terminal. */ |
77134727 | 159 | int tty = 0; |
9628b887 | 160 | |
30be2360 SM |
161 | /* If non-NULL, the name of an editor to fallback to if the server |
162 | is not running. --alternate-editor. */ | |
b03d27bd | 163 | const char *alternate_editor = NULL; |
30be2360 | 164 | |
3db926be | 165 | /* If non-NULL, the filename of the UNIX socket. */ |
254107e4 RS |
166 | char *socket_name = NULL; |
167 | ||
aa0b6932 JB |
168 | /* If non-NULL, the filename of the authentication file. */ |
169 | char *server_file = NULL; | |
170 | ||
c66648e0 JB |
171 | /* PID of the Emacs server process. */ |
172 | int emacs_pid = 0; | |
173 | ||
2381d38d | 174 | void print_help_and_exit () NO_RETURN; |
7f3bff3e | 175 | |
8f9aaa0a RS |
176 | struct option longopts[] = |
177 | { | |
749ae770 | 178 | { "no-wait", no_argument, NULL, 'n' }, |
30be2360 | 179 | { "eval", no_argument, NULL, 'e' }, |
8f9aaa0a RS |
180 | { "help", no_argument, NULL, 'H' }, |
181 | { "version", no_argument, NULL, 'V' }, | |
b28c910d | 182 | { "tty", no_argument, NULL, 't' }, |
e5299d8d | 183 | { "current-frame", no_argument, NULL, 'c' }, |
3cf8c6aa | 184 | { "alternate-editor", required_argument, NULL, 'a' }, |
b03d27bd | 185 | #ifndef NO_SOCKETS_IN_FILE_SYSTEM |
254107e4 | 186 | { "socket-name", required_argument, NULL, 's' }, |
b03d27bd | 187 | #endif |
aa0b6932 | 188 | { "server-file", required_argument, NULL, 'f' }, |
30be2360 SM |
189 | { "display", required_argument, NULL, 'd' }, |
190 | { 0, 0, 0, 0 } | |
8f9aaa0a RS |
191 | }; |
192 | ||
974b73e8 KL |
193 | \f |
194 | /* Like malloc but get fatal error if memory is exhausted. */ | |
195 | ||
196 | long * | |
197 | xmalloc (size) | |
198 | unsigned int size; | |
199 | { | |
200 | long *result = (long *) malloc (size); | |
201 | if (result == NULL) | |
202 | { | |
203 | perror ("malloc"); | |
204 | exit (EXIT_FAILURE); | |
205 | } | |
206 | return result; | |
207 | } | |
208 | ||
209 | /* Like strdup but get a fatal error if memory is exhausted. */ | |
210 | ||
211 | char * | |
212 | xstrdup (const char *s) | |
213 | { | |
214 | char *result = strdup (s); | |
215 | if (result == NULL) | |
216 | { | |
217 | perror ("strdup"); | |
218 | exit (EXIT_FAILURE); | |
219 | } | |
220 | return result; | |
221 | } | |
222 | ||
223 | /* From sysdep.c */ | |
224 | #if !defined (HAVE_GET_CURRENT_DIR_NAME) || defined (BROKEN_GET_CURRENT_DIR_NAME) | |
225 | ||
226 | /* Return the current working directory. Returns NULL on errors. | |
227 | Any other returned value must be freed with free. This is used | |
228 | only when get_current_dir_name is not defined on the system. */ | |
229 | char* | |
230 | get_current_dir_name () | |
231 | { | |
232 | char *buf; | |
233 | char *pwd; | |
234 | struct stat dotstat, pwdstat; | |
235 | /* If PWD is accurate, use it instead of calling getwd. PWD is | |
236 | sometimes a nicer name, and using it may avoid a fatal error if a | |
237 | parent directory is searchable but not readable. */ | |
238 | if ((pwd = getenv ("PWD")) != 0 | |
239 | && (IS_DIRECTORY_SEP (*pwd) || (*pwd && IS_DEVICE_SEP (pwd[1]))) | |
240 | && stat (pwd, &pwdstat) == 0 | |
241 | && stat (".", &dotstat) == 0 | |
242 | && dotstat.st_ino == pwdstat.st_ino | |
243 | && dotstat.st_dev == pwdstat.st_dev | |
244 | #ifdef MAXPATHLEN | |
245 | && strlen (pwd) < MAXPATHLEN | |
246 | #endif | |
247 | ) | |
248 | { | |
249 | buf = (char *) xmalloc (strlen (pwd) + 1); | |
250 | if (!buf) | |
251 | return NULL; | |
252 | strcpy (buf, pwd); | |
253 | } | |
254 | #ifdef HAVE_GETCWD | |
255 | else | |
256 | { | |
257 | size_t buf_size = 1024; | |
258 | buf = (char *) xmalloc (buf_size); | |
259 | if (!buf) | |
260 | return NULL; | |
261 | for (;;) | |
262 | { | |
263 | if (getcwd (buf, buf_size) == buf) | |
264 | break; | |
265 | if (errno != ERANGE) | |
266 | { | |
267 | int tmp_errno = errno; | |
268 | free (buf); | |
269 | errno = tmp_errno; | |
270 | return NULL; | |
271 | } | |
272 | buf_size *= 2; | |
273 | buf = (char *) realloc (buf, buf_size); | |
274 | if (!buf) | |
275 | return NULL; | |
276 | } | |
277 | } | |
278 | #else | |
279 | else | |
280 | { | |
281 | /* We need MAXPATHLEN here. */ | |
282 | buf = (char *) xmalloc (MAXPATHLEN + 1); | |
283 | if (!buf) | |
284 | return NULL; | |
285 | if (getwd (buf) == NULL) | |
286 | { | |
287 | int tmp_errno = errno; | |
288 | free (buf); | |
289 | errno = tmp_errno; | |
290 | return NULL; | |
291 | } | |
292 | } | |
293 | #endif | |
294 | return buf; | |
295 | } | |
296 | #endif | |
297 | ||
42073bfb JB |
298 | /* Message functions. */ |
299 | ||
300 | #ifdef WINDOWSNT | |
42073bfb | 301 | int |
f0384499 | 302 | w32_window_app () |
42073bfb JB |
303 | { |
304 | static int window_app = -1; | |
305 | char szTitle[MAX_PATH]; | |
306 | ||
307 | if (window_app < 0) | |
0d3d6719 JB |
308 | /* Checking for STDOUT does not work; it's a valid handle also in |
309 | nonconsole apps. Testing for the console title seems to work. */ | |
42073bfb JB |
310 | window_app = (GetConsoleTitleA (szTitle, MAX_PATH) == 0); |
311 | ||
312 | return window_app; | |
313 | } | |
105faa84 DN |
314 | |
315 | /* | |
316 | execvp wrapper for Windows. Quotes arguments with embedded spaces. | |
317 | ||
318 | This is necessary due to the broken implementation of exec* routines in | |
319 | the Microsoft libraries: they concatenate the arguments together without | |
320 | quoting special characters, and pass the result to CreateProcess, with | |
321 | predictably bad results. By contrast, Posix execvp passes the arguments | |
322 | directly into the argv array of the child process. | |
323 | */ | |
324 | int | |
325 | w32_execvp (path, argv) | |
326 | char *path; | |
327 | char **argv; | |
328 | { | |
329 | int i; | |
330 | ||
331 | /* Required to allow a .BAT script as alternate editor. */ | |
332 | argv[0] = (char *) alternate_editor; | |
333 | ||
334 | for (i = 0; argv[i]; i++) | |
335 | if (strchr (argv[i], ' ')) | |
336 | { | |
337 | char *quoted = alloca (strlen (argv[i]) + 3); | |
338 | sprintf (quoted, "\"%s\"", argv[i]); | |
339 | argv[i] = quoted; | |
340 | } | |
341 | ||
342 | return execvp (path, argv); | |
343 | } | |
344 | ||
345 | #undef execvp | |
346 | #define execvp w32_execvp | |
347 | ||
348 | #endif /* WINDOWSNT */ | |
42073bfb JB |
349 | |
350 | void | |
351 | message (int is_error, char *message, ...) | |
352 | { | |
c66648e0 | 353 | char msg [2048]; |
42073bfb JB |
354 | va_list args; |
355 | ||
356 | va_start (args, message); | |
42073bfb JB |
357 | vsprintf (msg, message, args); |
358 | va_end (args); | |
359 | ||
360 | #ifdef WINDOWSNT | |
361 | if (w32_window_app ()) | |
362 | { | |
363 | if (is_error) | |
364 | MessageBox (NULL, msg, "Emacsclient ERROR", MB_ICONERROR); | |
365 | else | |
366 | MessageBox (NULL, msg, "Emacsclient", MB_ICONINFORMATION); | |
367 | } | |
368 | else | |
369 | #endif | |
9219db75 JB |
370 | { |
371 | FILE *f = is_error ? stderr : stdout; | |
372 | ||
373 | fputs (msg, f); | |
374 | fflush (f); | |
375 | } | |
42073bfb JB |
376 | } |
377 | ||
8f9aaa0a | 378 | /* Decode the options from argv and argc. |
5212210c | 379 | The global variable `optind' will say how many arguments we used up. */ |
8f9aaa0a | 380 | |
5212210c | 381 | void |
8f9aaa0a RS |
382 | decode_options (argc, argv) |
383 | int argc; | |
384 | char **argv; | |
385 | { | |
b6b6d6d2 | 386 | alternate_editor = getenv ("ALTERNATE_EDITOR"); |
77134727 | 387 | display = getenv ("DISPLAY"); |
8689463a | 388 | if (display && strlen (display) == 0) |
e5299d8d | 389 | display = NULL; |
0b0d3e0b | 390 | |
8f9aaa0a RS |
391 | while (1) |
392 | { | |
393 | int opt = getopt_long (argc, argv, | |
b03d27bd | 394 | #ifndef NO_SOCKETS_IN_FILE_SYSTEM |
974b73e8 | 395 | "VHnea:s:f:d:tc", |
b03d27bd | 396 | #else |
974b73e8 | 397 | "VHnea:f:d:tc", |
b03d27bd | 398 | #endif |
974b73e8 | 399 | longopts, 0); |
8f9aaa0a RS |
400 | |
401 | if (opt == EOF) | |
402 | break; | |
403 | ||
404 | switch (opt) | |
405 | { | |
406 | case 0: | |
407 | /* If getopt returns 0, then it has already processed a | |
408 | long-named option. We should do nothing. */ | |
409 | break; | |
e69233c2 | 410 | |
97e3214d GM |
411 | case 'a': |
412 | alternate_editor = optarg; | |
413 | break; | |
e69233c2 | 414 | |
b03d27bd | 415 | #ifndef NO_SOCKETS_IN_FILE_SYSTEM |
254107e4 RS |
416 | case 's': |
417 | socket_name = optarg; | |
418 | break; | |
b03d27bd | 419 | #endif |
254107e4 | 420 | |
aa0b6932 JB |
421 | case 'f': |
422 | server_file = optarg; | |
423 | break; | |
254107e4 | 424 | |
30be2360 SM |
425 | case 'd': |
426 | display = optarg; | |
427 | break; | |
428 | ||
8f9aaa0a RS |
429 | case 'n': |
430 | nowait = 1; | |
431 | break; | |
432 | ||
30be2360 SM |
433 | case 'e': |
434 | eval = 1; | |
435 | break; | |
436 | ||
8f9aaa0a | 437 | case 'V': |
42073bfb | 438 | message (FALSE, "emacsclient %s\n", VERSION); |
65396510 | 439 | exit (EXIT_SUCCESS); |
8f9aaa0a | 440 | break; |
46cec291 | 441 | |
819b8f00 | 442 | case 't': |
77134727 | 443 | tty = 1; |
77134727 KL |
444 | break; |
445 | ||
e5299d8d | 446 | case 'c': |
92071250 | 447 | current_frame = 1; |
9628b887 | 448 | break; |
0b0d3e0b | 449 | |
8f9aaa0a | 450 | case 'H': |
8f9aaa0a | 451 | print_help_and_exit (); |
20c396e8 JB |
452 | break; |
453 | ||
454 | default: | |
42073bfb | 455 | message (TRUE, "Try `%s --help' for more information\n", progname); |
65396510 | 456 | exit (EXIT_FAILURE); |
20c396e8 | 457 | break; |
8f9aaa0a RS |
458 | } |
459 | } | |
9628b887 | 460 | |
92071250 KL |
461 | if (!tty && display) |
462 | window_system = 1; | |
463 | else | |
464 | tty = 1; | |
465 | ||
b8ccaf6f KL |
466 | /* --no-wait implies --current-frame on ttys when there are file |
467 | arguments or expressions given. */ | |
468 | if (nowait && tty && argc - optind > 0) | |
92071250 KL |
469 | current_frame = 1; |
470 | ||
471 | if (current_frame) | |
472 | { | |
473 | tty = 0; | |
474 | window_system = 0; | |
475 | } | |
476 | ||
477 | if (tty) | |
478 | window_system = 0; | |
8f9aaa0a RS |
479 | } |
480 | ||
974b73e8 | 481 | \f |
7f3bff3e | 482 | void |
8f9aaa0a RS |
483 | print_help_and_exit () |
484 | { | |
42073bfb | 485 | message (FALSE, |
974b73e8 | 486 | "Usage: %s [OPTIONS] FILE...\n\ |
30be2360 SM |
487 | Tell the Emacs server to visit the specified files.\n\ |
488 | Every FILE can be either just a FILENAME or [+LINE[:COLUMN]] FILENAME.\n\ | |
20c396e8 | 489 | \n\ |
30be2360 | 490 | The following OPTIONS are accepted:\n\ |
974b73e8 | 491 | -V, --version Just print version info and return\n\ |
30be2360 | 492 | -H, --help Print this usage information message\n\ |
819b8f00 | 493 | -t, --tty Open a new Emacs frame on the current terminal\n\ |
e5299d8d | 494 | -c, --current-frame Do not create a new frame; use the current Emacs frame\n\ |
30be2360 | 495 | -e, --eval Evaluate the FILE arguments as ELisp expressions\n\ |
974b73e8 KL |
496 | -n, --no-wait Don't wait for the server to return\n\ |
497 | -d, --display=DISPLAY Visit the file in the given display\n" | |
aa0b6932 JB |
498 | #ifndef NO_SOCKETS_IN_FILE_SYSTEM |
499 | "-s, --socket-name=FILENAME\n\ | |
974b73e8 | 500 | Set filename of the UNIX socket for communication\n" |
aa0b6932 JB |
501 | #endif |
502 | "-f, --server-file=FILENAME\n\ | |
974b73e8 | 503 | Set filename of the TCP authentication file\n\ |
30be2360 SM |
504 | -a, --alternate-editor=EDITOR\n\ |
505 | Editor to fallback to if the server is not running\n\ | |
20c396e8 | 506 | \n\ |
30be2360 | 507 | Report bugs to bug-gnu-emacs@gnu.org.\n", progname); |
65396510 | 508 | exit (EXIT_SUCCESS); |
8f9aaa0a | 509 | } |
5212210c | 510 | |
aa0b6932 JB |
511 | /* |
512 | Try to run a different command, or --if no alternate editor is | |
513 | defined-- exit with an errorcode. | |
514 | */ | |
515 | void | |
974b73e8 | 516 | fail (void) |
9002956f | 517 | { |
aa0b6932 | 518 | if (alternate_editor) |
9002956f | 519 | { |
aa0b6932 | 520 | int i = optind - 1; |
4472aef4 | 521 | |
974b73e8 | 522 | execvp (alternate_editor, main_argv + i); |
42073bfb | 523 | message (TRUE, "%s: error executing alternate editor \"%s\"\n", |
974b73e8 | 524 | progname, alternate_editor); |
9002956f | 525 | } |
aa0b6932 | 526 | exit (EXIT_FAILURE); |
9002956f KL |
527 | } |
528 | ||
aa0b6932 | 529 | \f |
1e7823d0 | 530 | #if !defined (HAVE_SOCKETS) || !defined (HAVE_INET_SOCKETS) |
9002956f | 531 | |
aa0b6932 JB |
532 | int |
533 | main (argc, argv) | |
534 | int argc; | |
535 | char **argv; | |
9002956f | 536 | { |
974b73e8 KL |
537 | main_argc = argc; |
538 | main_argv = argv; | |
539 | progname = argv[0]; | |
540 | message (TRUE, "%s: Sorry, the Emacs server is supported only\n" | |
541 | "on systems with Berkeley sockets.\n", | |
aa0b6932 | 542 | argv[0]); |
974b73e8 | 543 | fail (); |
9002956f KL |
544 | } |
545 | ||
1e7823d0 | 546 | #else /* HAVE_SOCKETS && HAVE_INET_SOCKETS */ |
2828d5f9 | 547 | |
aa0b6932 JB |
548 | #ifdef WINDOWSNT |
549 | # include <winsock2.h> | |
2828d5f9 | 550 | #else |
aa0b6932 JB |
551 | # include <sys/types.h> |
552 | # include <sys/socket.h> | |
553 | # include <sys/un.h> | |
554 | # include <sys/stat.h> | |
555 | # include <errno.h> | |
556 | #endif | |
557 | ||
558 | #define AUTH_KEY_LENGTH 64 | |
559 | #define SEND_BUFFER_SIZE 4096 | |
560 | ||
561 | extern char *strerror (); | |
562 | extern int errno; | |
563 | ||
564 | /* Buffer to accumulate data to send in TCP connections. */ | |
565 | char send_buffer[SEND_BUFFER_SIZE + 1]; | |
566 | int sblen = 0; /* Fill pointer for the send buffer. */ | |
4b7b77f6 JR |
567 | /* Socket used to communicate with the Emacs server process. */ |
568 | HSOCKET emacs_socket = 0; | |
aa0b6932 JB |
569 | |
570 | /* Let's send the data to Emacs when either | |
571 | - the data ends in "\n", or | |
572 | - the buffer is full (but this shouldn't happen) | |
573 | Otherwise, we just accumulate it. */ | |
b03d27bd JB |
574 | void |
575 | send_to_emacs (s, data) | |
aa0b6932 JB |
576 | HSOCKET s; |
577 | char *data; | |
578 | { | |
579 | while (data) | |
2828d5f9 | 580 | { |
aa0b6932 JB |
581 | int dlen = strlen (data); |
582 | if (dlen + sblen >= SEND_BUFFER_SIZE) | |
583 | { | |
584 | int part = SEND_BUFFER_SIZE - sblen; | |
585 | strncpy (&send_buffer[sblen], data, part); | |
586 | data += part; | |
587 | sblen = SEND_BUFFER_SIZE; | |
588 | } | |
589 | else if (dlen) | |
590 | { | |
591 | strcpy (&send_buffer[sblen], data); | |
592 | data = NULL; | |
593 | sblen += dlen; | |
594 | } | |
595 | else | |
596 | break; | |
597 | ||
598 | if (sblen == SEND_BUFFER_SIZE | |
599 | || (sblen > 0 && send_buffer[sblen-1] == '\n')) | |
600 | { | |
601 | int sent = send (s, send_buffer, sblen, 0); | |
602 | if (sent != sblen) | |
603 | strcpy (send_buffer, &send_buffer[sent]); | |
604 | sblen -= sent; | |
605 | } | |
2828d5f9 | 606 | } |
2828d5f9 | 607 | } |
2828d5f9 KL |
608 | |
609 | \f | |
0b0d3e0b | 610 | /* In STR, insert a & before each &, each space, each newline, and |
a4cf2096 | 611 | any initial -. Change spaces to underscores, too, so that the |
0b0d3e0b KL |
612 | return value never contains a space. |
613 | ||
614 | Does not change the string. Outputs the result to STREAM. */ | |
87209357 | 615 | void |
974b73e8 | 616 | quote_argument (s, str) |
aa0b6932 | 617 | HSOCKET s; |
0b0d3e0b | 618 | char *str; |
5212210c | 619 | { |
9002956f | 620 | char *copy = (char *) xmalloc (strlen (str) * 2 + 1); |
5212210c RS |
621 | char *p, *q; |
622 | ||
0b0d3e0b | 623 | p = str; |
5212210c RS |
624 | q = copy; |
625 | while (*p) | |
626 | { | |
627 | if (*p == ' ') | |
628 | { | |
f1db6a73 | 629 | *q++ = '&'; |
5212210c RS |
630 | *q++ = '_'; |
631 | p++; | |
632 | } | |
3cf8c6aa SM |
633 | else if (*p == '\n') |
634 | { | |
635 | *q++ = '&'; | |
636 | *q++ = 'n'; | |
637 | p++; | |
638 | } | |
5212210c RS |
639 | else |
640 | { | |
0b0d3e0b | 641 | if (*p == '&' || (*p == '-' && p == str)) |
f1db6a73 | 642 | *q++ = '&'; |
5212210c RS |
643 | *q++ = *p++; |
644 | } | |
645 | } | |
f1db6a73 | 646 | *q++ = 0; |
5212210c | 647 | |
aa0b6932 | 648 | SEND_STRING (copy); |
87209357 EZ |
649 | |
650 | free (copy); | |
5212210c | 651 | } |
0c76956f | 652 | |
0b0d3e0b KL |
653 | |
654 | /* The inverse of quote_argument. Removes quoting in string STR by | |
655 | modifying the string in place. Returns STR. */ | |
656 | ||
657 | char * | |
658 | unquote_argument (str) | |
659 | char *str; | |
660 | { | |
661 | char *p, *q; | |
662 | ||
663 | if (! str) | |
664 | return str; | |
665 | ||
666 | p = str; | |
667 | q = str; | |
668 | while (*p) | |
669 | { | |
670 | if (*p == '&') | |
671 | { | |
672 | p++; | |
673 | if (*p == '&') | |
674 | *p = '&'; | |
675 | else if (*p == '_') | |
676 | *p = ' '; | |
677 | else if (*p == 'n') | |
678 | *p = '\n'; | |
679 | else if (*p == '-') | |
680 | *p = '-'; | |
681 | } | |
682 | *q++ = *p++; | |
683 | } | |
684 | *q = 0; | |
685 | return str; | |
686 | } | |
687 | ||
8f9aaa0a | 688 | \f |
b03d27bd JB |
689 | int |
690 | file_name_absolute_p (filename) | |
691 | const unsigned char *filename; | |
692 | { | |
693 | /* Sanity check, it shouldn't happen. */ | |
694 | if (! filename) return FALSE; | |
695 | ||
696 | /* /xxx is always an absolute path. */ | |
697 | if (filename[0] == '/') return TRUE; | |
698 | ||
699 | /* Empty filenames (which shouldn't happen) are relative. */ | |
700 | if (filename[0] == '\0') return FALSE; | |
701 | ||
702 | #ifdef WINDOWSNT | |
71b8f735 | 703 | /* X:\xxx is always absolute. */ |
5f7a4874 | 704 | if (isalpha (filename[0]) |
cb0297bb | 705 | && filename[1] == ':' && (filename[2] == '\\' || filename[2] == '/')) |
b03d27bd JB |
706 | return TRUE; |
707 | ||
708 | /* Both \xxx and \\xxx\yyy are absolute. */ | |
709 | if (filename[0] == '\\') return TRUE; | |
71b8f735 JB |
710 | |
711 | /* | |
712 | FIXME: There's a corner case not dealt with, "x:y", where: | |
713 | ||
714 | 1) x is a valid drive designation (usually a letter in the A-Z range) | |
715 | and y is a path, relative to the current directory on drive x. This | |
716 | is absolute, *after* fixing the y part to include the current | |
717 | directory in x. | |
718 | ||
719 | 2) x is a relative file name, and y is an NTFS stream name. This is a | |
720 | correct relative path, but it is very unusual. | |
721 | ||
722 | The trouble is that first case items are also valid examples of the | |
723 | second case, i.e., "c:test" can be understood as drive:path or as | |
724 | file:stream. | |
725 | ||
726 | The "right" fix would involve checking whether | |
727 | - the current drive/partition is NTFS, | |
728 | - x is a valid (and accesible) drive designator, | |
729 | - x:y already exists as a file:stream in the current directory, | |
730 | - y already exists on the current directory of drive x, | |
731 | - the auspices are favorable, | |
732 | and then taking an "informed decision" based on the above. | |
733 | ||
734 | Whatever the result, Emacs currently does a very bad job of dealing | |
735 | with NTFS file:streams: it cannot visit them, and the only way to | |
736 | create one is by setting `buffer-file-name' to point to it (either | |
737 | manually or with emacsclient). So perhaps resorting to 1) and ignoring | |
738 | 2) for now is the right thing to do. | |
739 | ||
740 | Anyway, something to decide After the Release. | |
741 | */ | |
b03d27bd JB |
742 | #endif |
743 | ||
744 | return FALSE; | |
745 | } | |
746 | ||
aa0b6932 | 747 | #ifdef WINDOWSNT |
f0384499 | 748 | /* Wrapper to make WSACleanup a cdecl, as required by atexit. */ |
b03d27bd JB |
749 | void |
750 | __cdecl close_winsock () | |
aa0b6932 JB |
751 | { |
752 | WSACleanup (); | |
753 | } | |
0c76956f | 754 | |
b03d27bd JB |
755 | /* Initialize the WinSock2 library. */ |
756 | void | |
757 | initialize_sockets () | |
0c76956f | 758 | { |
aa0b6932 JB |
759 | WSADATA wsaData; |
760 | ||
aa0b6932 JB |
761 | if (WSAStartup (MAKEWORD (2, 0), &wsaData)) |
762 | { | |
42073bfb | 763 | message (TRUE, "%s: error initializing WinSock2", progname); |
aa0b6932 JB |
764 | exit (EXIT_FAILURE); |
765 | } | |
766 | ||
767 | atexit (close_winsock); | |
0c76956f | 768 | } |
e35fc962 | 769 | #endif /* WINDOWSNT */ |
974b73e8 | 770 | |
8f9aaa0a | 771 | \f |
97e3214d | 772 | /* |
aa0b6932 | 773 | * Read the information needed to set up a TCP comm channel with |
434a6c5d | 774 | * the Emacs server: host, port, pid and authentication string. |
0e0dced5 | 775 | */ |
b03d27bd JB |
776 | int |
777 | get_server_config (server, authentication) | |
aa0b6932 JB |
778 | struct sockaddr_in *server; |
779 | char *authentication; | |
97e3214d | 780 | { |
aa0b6932 JB |
781 | char dotted[32]; |
782 | char *port; | |
434a6c5d | 783 | char *pid; |
b03d27bd | 784 | FILE *config = NULL; |
aa0b6932 | 785 | |
b03d27bd JB |
786 | if (file_name_absolute_p (server_file)) |
787 | config = fopen (server_file, "rb"); | |
788 | else | |
97e3214d | 789 | { |
aa0b6932 | 790 | char *home = getenv ("HOME"); |
88b46d84 | 791 | |
aa0b6932 JB |
792 | if (home) |
793 | { | |
794 | char *path = alloca (32 + strlen (home) + strlen (server_file)); | |
795 | sprintf (path, "%s/.emacs.d/server/%s", home, server_file); | |
796 | config = fopen (path, "rb"); | |
797 | } | |
88b46d84 JB |
798 | #ifdef WINDOWSNT |
799 | if (!config && (home = getenv ("APPDATA"))) | |
800 | { | |
801 | char *path = alloca (32 + strlen (home) + strlen (server_file)); | |
802 | sprintf (path, "%s/.emacs.d/server/%s", home, server_file); | |
803 | config = fopen (path, "rb"); | |
804 | } | |
805 | #endif | |
aa0b6932 JB |
806 | } |
807 | ||
808 | if (! config) | |
809 | return FALSE; | |
810 | ||
811 | if (fgets (dotted, sizeof dotted, config) | |
434a6c5d JB |
812 | && (port = strchr (dotted, ':')) |
813 | && (pid = strchr (port, ' '))) | |
aa0b6932 JB |
814 | { |
815 | *port++ = '\0'; | |
434a6c5d | 816 | *pid++ = '\0'; |
97e3214d GM |
817 | } |
818 | else | |
819 | { | |
42073bfb | 820 | message (TRUE, "%s: invalid configuration info", progname); |
65396510 | 821 | exit (EXIT_FAILURE); |
97e3214d | 822 | } |
97e3214d | 823 | |
aa0b6932 JB |
824 | server->sin_family = AF_INET; |
825 | server->sin_addr.s_addr = inet_addr (dotted); | |
826 | server->sin_port = htons (atoi (port)); | |
97e3214d | 827 | |
aa0b6932 JB |
828 | if (! fread (authentication, AUTH_KEY_LENGTH, 1, config)) |
829 | { | |
42073bfb | 830 | message (TRUE, "%s: cannot read authentication info", progname); |
aa0b6932 JB |
831 | exit (EXIT_FAILURE); |
832 | } | |
46cec291 | 833 | |
aa0b6932 | 834 | fclose (config); |
97e3214d | 835 | |
c66648e0 | 836 | emacs_pid = atoi (pid); |
434a6c5d | 837 | |
aa0b6932 | 838 | return TRUE; |
97e3214d GM |
839 | } |
840 | ||
aa0b6932 JB |
841 | HSOCKET |
842 | set_tcp_socket () | |
843 | { | |
844 | HSOCKET s; | |
845 | struct sockaddr_in server; | |
aa0b6932 JB |
846 | struct linger l_arg = {1, 1}; |
847 | char auth_string[AUTH_KEY_LENGTH + 1]; | |
9628b887 | 848 | |
aa0b6932 JB |
849 | if (! get_server_config (&server, auth_string)) |
850 | return INVALID_SOCKET; | |
851 | ||
b03d27bd | 852 | if (server.sin_addr.s_addr != inet_addr ("127.0.0.1")) |
9219db75 | 853 | message (FALSE, "%s: connected to remote socket at %s\n", |
b03d27bd JB |
854 | progname, inet_ntoa (server.sin_addr)); |
855 | ||
aa0b6932 JB |
856 | /* |
857 | * Open up an AF_INET socket | |
858 | */ | |
859 | if ((s = socket (AF_INET, SOCK_STREAM, IPPROTO_TCP)) < 0) | |
860 | { | |
42073bfb | 861 | message (TRUE, "%s: socket: %s\n", progname, strerror (errno)); |
aa0b6932 JB |
862 | return INVALID_SOCKET; |
863 | } | |
864 | ||
865 | /* | |
866 | * Set up the socket | |
867 | */ | |
868 | if (connect (s, (struct sockaddr *) &server, sizeof server) < 0) | |
869 | { | |
42073bfb | 870 | message (TRUE, "%s: connect: %s\n", progname, strerror (errno)); |
aa0b6932 JB |
871 | return INVALID_SOCKET; |
872 | } | |
873 | ||
aa0b6932 JB |
874 | setsockopt (s, SOL_SOCKET, SO_LINGER, (char *) &l_arg, sizeof l_arg); |
875 | ||
876 | /* | |
877 | * Send the authentication | |
878 | */ | |
879 | auth_string[AUTH_KEY_LENGTH] = '\0'; | |
880 | ||
881 | SEND_STRING ("-auth "); | |
882 | SEND_STRING (auth_string); | |
883 | SEND_STRING ("\n"); | |
884 | ||
885 | return s; | |
886 | } | |
887 | ||
b2ff54a0 JR |
888 | |
889 | /* Returns 1 if PREFIX is a prefix of STRING. */ | |
890 | static int | |
891 | strprefix (char *prefix, char *string) | |
892 | { | |
893 | int i; | |
894 | if (! prefix) | |
895 | return 1; | |
896 | ||
897 | if (!string) | |
898 | return 0; | |
899 | ||
900 | for (i = 0; prefix[i]; i++) | |
901 | if (!string[i] || string[i] != prefix[i]) | |
902 | return 0; | |
903 | return 1; | |
904 | } | |
905 | ||
906 | ||
aa0b6932 | 907 | #if !defined (NO_SOCKETS_IN_FILE_SYSTEM) |
46cec291 | 908 | |
9f637eea GM |
909 | /* Three possibilities: |
910 | 2 - can't be `stat'ed (sets errno) | |
911 | 1 - isn't owned by us | |
912 | 0 - success: none of the above */ | |
913 | ||
914 | static int | |
915 | socket_status (socket_name) | |
916 | char *socket_name; | |
917 | { | |
918 | struct stat statbfr; | |
919 | ||
920 | if (stat (socket_name, &statbfr) == -1) | |
921 | return 2; | |
922 | ||
923 | if (statbfr.st_uid != geteuid ()) | |
924 | return 1; | |
0b0d3e0b | 925 | |
9f637eea GM |
926 | return 0; |
927 | } | |
928 | ||
974b73e8 | 929 | \f |
da8e1115 KL |
930 | /* A signal handler that passes the signal to the Emacs process. |
931 | Useful for SIGWINCH. */ | |
932 | ||
9628b887 | 933 | SIGTYPE |
428a555e | 934 | pass_signal_to_emacs (int signalnum) |
9628b887 KL |
935 | { |
936 | int old_errno = errno; | |
937 | ||
9f729af5 | 938 | if (emacs_pid) |
428a555e | 939 | kill (emacs_pid, signalnum); |
9f729af5 | 940 | |
428a555e | 941 | signal (signalnum, pass_signal_to_emacs); |
9f729af5 KL |
942 | errno = old_errno; |
943 | } | |
944 | ||
0b0d3e0b KL |
945 | /* Signal handler for SIGCONT; notify the Emacs process that it can |
946 | now resume our tty frame. */ | |
947 | ||
948 | SIGTYPE | |
949 | handle_sigcont (int signalnum) | |
950 | { | |
951 | int old_errno = errno; | |
952 | ||
953 | if (tcgetpgrp (1) == getpgrp ()) | |
954 | { | |
955 | /* We are in the foreground. */ | |
382707ec | 956 | SEND_STRING ("-resume \n"); |
0b0d3e0b KL |
957 | } |
958 | else | |
959 | { | |
960 | /* We are in the background; cancel the continue. */ | |
961 | kill (getpid (), SIGSTOP); | |
962 | } | |
c6c53c3e KL |
963 | |
964 | signal (signalnum, handle_sigcont); | |
0b0d3e0b KL |
965 | errno = old_errno; |
966 | } | |
967 | ||
968 | /* Signal handler for SIGTSTP; notify the Emacs process that we are | |
969 | going to sleep. Normally the suspend is initiated by Emacs via | |
970 | server-handle-suspend-tty, but if the server gets out of sync with | |
971 | reality, we may get a SIGTSTP on C-z. Handling this signal and | |
972 | notifying Emacs about it should get things under control again. */ | |
973 | ||
974 | SIGTYPE | |
975 | handle_sigtstp (int signalnum) | |
976 | { | |
977 | int old_errno = errno; | |
978 | sigset_t set; | |
979 | ||
382707ec KL |
980 | if (s) |
981 | SEND_STRING ("-suspend \n"); | |
0b0d3e0b KL |
982 | |
983 | /* Unblock this signal and call the default handler by temprarily | |
984 | changing the handler and resignalling. */ | |
985 | sigprocmask (SIG_BLOCK, NULL, &set); | |
986 | sigdelset (&set, signalnum); | |
987 | signal (signalnum, SIG_DFL); | |
988 | kill (getpid (), signalnum); | |
989 | sigprocmask (SIG_SETMASK, &set, NULL); /* Let's the above signal through. */ | |
990 | signal (signalnum, handle_sigtstp); | |
991 | ||
992 | errno = old_errno; | |
993 | } | |
da8e1115 | 994 | /* Set up signal handlers before opening a frame on the current tty. */ |
0b0d3e0b | 995 | |
4d553a13 KL |
996 | void |
997 | init_signals (void) | |
9628b887 KL |
998 | { |
999 | /* Set up signal handlers. */ | |
428a555e | 1000 | signal (SIGWINCH, pass_signal_to_emacs); |
4ca927b4 KL |
1001 | |
1002 | /* Don't pass SIGINT and SIGQUIT to Emacs, because it has no way of | |
1003 | deciding which terminal the signal came from. C-g is now a | |
1004 | normal input event on secondary terminals. */ | |
1005 | #if 0 | |
428a555e KL |
1006 | signal (SIGINT, pass_signal_to_emacs); |
1007 | signal (SIGQUIT, pass_signal_to_emacs); | |
4ca927b4 | 1008 | #endif |
0b0d3e0b KL |
1009 | |
1010 | signal (SIGCONT, handle_sigcont); | |
1011 | signal (SIGTSTP, handle_sigtstp); | |
1012 | signal (SIGTTOU, handle_sigtstp); | |
9628b887 KL |
1013 | } |
1014 | ||
46cec291 | 1015 | |
aa0b6932 JB |
1016 | HSOCKET |
1017 | set_local_socket () | |
46cec291 | 1018 | { |
aa0b6932 | 1019 | HSOCKET s; |
46cec291 | 1020 | struct sockaddr_un server; |
46cec291 | 1021 | |
e69233c2 | 1022 | /* |
46cec291 RS |
1023 | * Open up an AF_UNIX socket in this person's home directory |
1024 | */ | |
1025 | ||
1026 | if ((s = socket (AF_UNIX, SOCK_STREAM, 0)) < 0) | |
1027 | { | |
42073bfb | 1028 | message (TRUE, "%s: socket: %s\n", progname, strerror (errno)); |
aa0b6932 | 1029 | return INVALID_SOCKET; |
46cec291 | 1030 | } |
e69233c2 | 1031 | |
46cec291 | 1032 | server.sun_family = AF_UNIX; |
c5fee545 | 1033 | |
c5fee545 | 1034 | { |
9f637eea | 1035 | int sock_status = 0; |
5c9659d3 | 1036 | int default_sock = !socket_name; |
b80bf66e | 1037 | int saved_errno = 0; |
0b0d3e0b | 1038 | |
0734b0d0 | 1039 | char *server_name = "server"; |
0b0d3e0b | 1040 | |
0734b0d0 SM |
1041 | if (socket_name && !index (socket_name, '/') && !index (socket_name, '\\')) |
1042 | { /* socket_name is a file name component. */ | |
d3a6748c KL |
1043 | server_name = socket_name; |
1044 | socket_name = NULL; | |
1045 | default_sock = 1; /* Try both UIDs. */ | |
0734b0d0 | 1046 | } |
efb859b4 | 1047 | |
5c9659d3 | 1048 | if (default_sock) |
254107e4 | 1049 | { |
d3a6748c KL |
1050 | socket_name = alloca (100 + strlen (server_name)); |
1051 | sprintf (socket_name, "/tmp/emacs%d/%s", | |
1052 | (int) geteuid (), server_name); | |
254107e4 RS |
1053 | } |
1054 | ||
1055 | if (strlen (socket_name) < sizeof (server.sun_path)) | |
1056 | strcpy (server.sun_path, socket_name); | |
1057 | else | |
819b8f00 | 1058 | { |
974b73e8 KL |
1059 | message (TRUE, "%s: socket-name %s too long", |
1060 | progname, socket_name); | |
819b8f00 KL |
1061 | fail (); |
1062 | } | |
efb859b4 | 1063 | |
9f637eea GM |
1064 | /* See if the socket exists, and if it's owned by us. */ |
1065 | sock_status = socket_status (server.sun_path); | |
152b6e83 | 1066 | saved_errno = errno; |
5c9659d3 | 1067 | if (sock_status && default_sock) |
efb859b4 | 1068 | { |
9f637eea GM |
1069 | /* Failing that, see if LOGNAME or USER exist and differ from |
1070 | our euid. If so, look for a socket based on the UID | |
1071 | associated with the name. This is reminiscent of the logic | |
1072 | that init_editfns uses to set the global Vuser_full_name. */ | |
e69233c2 | 1073 | |
9f637eea | 1074 | char *user_name = (char *) getenv ("LOGNAME"); |
293f9f2a | 1075 | |
9f637eea GM |
1076 | if (!user_name) |
1077 | user_name = (char *) getenv ("USER"); | |
e69233c2 | 1078 | |
9f637eea GM |
1079 | if (user_name) |
1080 | { | |
1081 | struct passwd *pw = getpwnam (user_name); | |
293f9f2a | 1082 | |
9f637eea GM |
1083 | if (pw && (pw->pw_uid != geteuid ())) |
1084 | { | |
1085 | /* We're running under su, apparently. */ | |
0734b0d0 SM |
1086 | socket_name = alloca (100 + strlen (server_name)); |
1087 | sprintf (socket_name, "/tmp/emacs%d/%s", | |
1088 | (int) pw->pw_uid, server_name); | |
5c9659d3 SM |
1089 | |
1090 | if (strlen (socket_name) < sizeof (server.sun_path)) | |
1091 | strcpy (server.sun_path, socket_name); | |
1092 | else | |
1093 | { | |
42073bfb | 1094 | message (TRUE, "%s: socket-name %s too long", |
aa0b6932 | 1095 | progname, socket_name); |
65396510 | 1096 | exit (EXIT_FAILURE); |
5c9659d3 SM |
1097 | } |
1098 | ||
9f637eea | 1099 | sock_status = socket_status (server.sun_path); |
b80bf66e | 1100 | saved_errno = errno; |
9f637eea | 1101 | } |
293f9f2a RS |
1102 | else |
1103 | errno = saved_errno; | |
9f637eea | 1104 | } |
efb859b4 | 1105 | } |
e69233c2 | 1106 | |
aa0b6932 JB |
1107 | switch (sock_status) |
1108 | { | |
1109 | case 1: | |
974b73e8 KL |
1110 | /* There's a socket, but it isn't owned by us. This is OK if |
1111 | we are root. */ | |
1112 | if (0 != geteuid ()) | |
1113 | { | |
1114 | message (TRUE, "%s: Invalid socket owner\n", progname); | |
aa0b6932 | 1115 | return INVALID_SOCKET; |
974b73e8 KL |
1116 | } |
1117 | break; | |
aa0b6932 JB |
1118 | |
1119 | case 2: | |
974b73e8 KL |
1120 | /* `stat' failed */ |
1121 | if (saved_errno == ENOENT) | |
1122 | message (TRUE, | |
1123 | "%s: can't find socket; have you started the server?\n\ | |
45adde32 | 1124 | To start the server in Emacs, type \"M-x server-start\".\n", |
aa0b6932 | 1125 | progname); |
974b73e8 KL |
1126 | else |
1127 | message (TRUE, "%s: can't stat %s: %s\n", | |
aa0b6932 | 1128 | progname, server.sun_path, strerror (saved_errno)); |
974b73e8 | 1129 | return INVALID_SOCKET; |
aa0b6932 | 1130 | } |
efb859b4 | 1131 | } |
46cec291 | 1132 | |
4e23f2ba JB |
1133 | if (connect (s, (struct sockaddr *) &server, strlen (server.sun_path) + 2) |
1134 | < 0) | |
46cec291 | 1135 | { |
42073bfb | 1136 | message (TRUE, "%s: connect: %s\n", progname, strerror (errno)); |
aa0b6932 | 1137 | return INVALID_SOCKET; |
46cec291 | 1138 | } |
23a7488d | 1139 | |
aa0b6932 JB |
1140 | return s; |
1141 | } | |
1142 | #endif /* ! NO_SOCKETS_IN_FILE_SYSTEM */ | |
1143 | ||
1144 | HSOCKET | |
1145 | set_socket () | |
1146 | { | |
b03d27bd | 1147 | HSOCKET s; |
974b73e8 | 1148 | |
b03d27bd | 1149 | INITIALIZE (); |
974b73e8 | 1150 | |
aa0b6932 | 1151 | #ifndef NO_SOCKETS_IN_FILE_SYSTEM |
b03d27bd JB |
1152 | /* Explicit --socket-name argument. */ |
1153 | if (socket_name) | |
46cec291 | 1154 | { |
b03d27bd JB |
1155 | s = set_local_socket (); |
1156 | if ((s != INVALID_SOCKET) || alternate_editor) | |
974b73e8 | 1157 | return s; |
42073bfb | 1158 | message (TRUE, "%s: error accessing socket \"%s\"", |
974b73e8 | 1159 | progname, socket_name); |
b03d27bd | 1160 | exit (EXIT_FAILURE); |
46cec291 | 1161 | } |
b03d27bd JB |
1162 | #endif |
1163 | ||
1164 | /* Explicit --server-file arg or EMACS_SERVER_FILE variable. */ | |
1165 | if (!server_file) | |
1166 | server_file = getenv ("EMACS_SERVER_FILE"); | |
46cec291 | 1167 | |
b03d27bd | 1168 | if (server_file) |
23a7488d | 1169 | { |
b03d27bd JB |
1170 | s = set_tcp_socket (); |
1171 | if ((s != INVALID_SOCKET) || alternate_editor) | |
974b73e8 KL |
1172 | return s; |
1173 | ||
42073bfb | 1174 | message (TRUE, "%s: error accessing server file \"%s\"", |
974b73e8 | 1175 | progname, server_file); |
b03d27bd | 1176 | exit (EXIT_FAILURE); |
23a7488d | 1177 | } |
974b73e8 | 1178 | |
b03d27bd JB |
1179 | #ifndef NO_SOCKETS_IN_FILE_SYSTEM |
1180 | /* Implicit local socket. */ | |
1181 | s = set_local_socket (); | |
1182 | if (s != INVALID_SOCKET) | |
1183 | return s; | |
1184 | #endif | |
23a7488d | 1185 | |
b03d27bd JB |
1186 | /* Implicit server file. */ |
1187 | server_file = "server"; | |
1188 | s = set_tcp_socket (); | |
1189 | if ((s != INVALID_SOCKET) || alternate_editor) | |
1190 | return s; | |
1191 | ||
1192 | /* No implicit or explicit socket, and no alternate editor. */ | |
42073bfb | 1193 | message (TRUE, "%s: No socket or alternate editor. Please use:\n\n" |
b03d27bd JB |
1194 | #ifndef NO_SOCKETS_IN_FILE_SYSTEM |
1195 | "\t--socket-name\n" | |
ee6a193c | 1196 | #endif |
b03d27bd JB |
1197 | "\t--server-file (or environment variable EMACS_SERVER_FILE)\n\ |
1198 | \t--alternate-editor (or environment variable ALTERNATE_EDITOR)\n", | |
1199 | progname); | |
1200 | exit (EXIT_FAILURE); | |
aa0b6932 | 1201 | } |
46cec291 | 1202 | |
0e0dced5 JB |
1203 | #ifdef WINDOWSNT |
1204 | FARPROC set_fg; /* Pointer to AllowSetForegroundWindow. */ | |
1205 | FARPROC get_wc; /* Pointer to RealGetWindowClassA. */ | |
1206 | ||
1207 | BOOL CALLBACK | |
1208 | w32_find_emacs_process (hWnd, lParam) | |
1209 | HWND hWnd; | |
1210 | LPARAM lParam; | |
1211 | { | |
1212 | DWORD pid; | |
1213 | char class[6]; | |
1214 | ||
1215 | /* Reject any window not of class "Emacs". */ | |
1216 | if (! get_wc (hWnd, class, sizeof (class)) | |
1217 | || strcmp (class, "Emacs")) | |
1218 | return TRUE; | |
1219 | ||
1220 | /* We only need the process id, not the thread id. */ | |
1221 | (void) GetWindowThreadProcessId (hWnd, &pid); | |
1222 | ||
1223 | /* Not the one we're looking for. */ | |
1224 | if (pid != (DWORD) emacs_pid) return TRUE; | |
1225 | ||
1226 | /* OK, let's raise it. */ | |
1227 | set_fg (emacs_pid); | |
1228 | ||
1229 | /* Stop enumeration. */ | |
1230 | return FALSE; | |
1231 | } | |
1232 | ||
1233 | /* | |
1234 | * Search for a window of class "Emacs" and owned by a process with | |
1235 | * process id = emacs_pid. If found, allow it to grab the focus. | |
1236 | */ | |
1237 | void | |
1238 | w32_give_focus () | |
1239 | { | |
1240 | HMODULE hUser32; | |
1241 | ||
71b8f735 | 1242 | /* It shouldn't happen when dealing with TCP sockets. */ |
0e0dced5 JB |
1243 | if (!emacs_pid) return; |
1244 | ||
1245 | if (!(hUser32 = LoadLibrary ("user32.dll"))) return; | |
1246 | ||
1247 | /* Modern Windows restrict which processes can set the foreground window. | |
1248 | emacsclient can allow Emacs to grab the focus by calling the function | |
1249 | AllowSetForegroundWindow. Unfortunately, older Windows (W95, W98 and | |
1250 | NT) lack this function, so we have to check its availability. */ | |
1251 | if ((set_fg = GetProcAddress (hUser32, "AllowSetForegroundWindow")) | |
1252 | && (get_wc = GetProcAddress (hUser32, "RealGetWindowClassA"))) | |
1253 | EnumWindows (w32_find_emacs_process, (LPARAM) 0); | |
1254 | ||
1255 | FreeLibrary (hUser32); | |
1256 | } | |
1257 | #endif | |
1258 | ||
aa0b6932 JB |
1259 | int |
1260 | main (argc, argv) | |
1261 | int argc; | |
1262 | char **argv; | |
1263 | { | |
aa0b6932 | 1264 | int i, rl, needlf = 0; |
974b73e8 | 1265 | char *cwd, *str; |
aa0b6932 JB |
1266 | char string[BUFSIZ+1]; |
1267 | ||
974b73e8 KL |
1268 | main_argc = argc; |
1269 | main_argv = argv; | |
aa0b6932 JB |
1270 | progname = argv[0]; |
1271 | ||
1272 | /* Process options. */ | |
1273 | decode_options (argc, argv); | |
1274 | ||
974b73e8 | 1275 | if ((argc - optind < 1) && !eval && !tty && !window_system) |
23a7488d | 1276 | { |
974b73e8 KL |
1277 | message (TRUE, "%s: file name or argument required\n" |
1278 | "Try `%s --help' for more information\n", | |
1279 | progname, progname); | |
aa0b6932 | 1280 | exit (EXIT_FAILURE); |
23a7488d RS |
1281 | } |
1282 | ||
4b7b77f6 | 1283 | if ((emacs_socket = set_socket ()) == INVALID_SOCKET) |
974b73e8 | 1284 | fail (); |
aa0b6932 | 1285 | |
974b73e8 KL |
1286 | |
1287 | cwd = get_current_dir_name (); | |
46cec291 RS |
1288 | if (cwd == 0) |
1289 | { | |
1290 | /* getwd puts message in STRING if it fails. */ | |
974b73e8 KL |
1291 | message (TRUE, "%s: %s\n", progname, |
1292 | "Cannot get current working directory"); | |
819b8f00 | 1293 | fail (); |
46cec291 RS |
1294 | } |
1295 | ||
c66648e0 | 1296 | #ifdef WINDOWSNT |
0e0dced5 | 1297 | w32_give_focus (); |
c66648e0 JB |
1298 | #endif |
1299 | ||
a9298135 | 1300 | /* First of all, send our version number for verification. */ |
974b73e8 KL |
1301 | SEND_STRING ("-version "); |
1302 | SEND_STRING (VERSION); | |
1303 | SEND_STRING (" "); | |
0b0d3e0b | 1304 | |
9002956f | 1305 | /* Send over our environment. */ |
59e085e0 KL |
1306 | if (!current_frame) |
1307 | { | |
1308 | extern char **environ; | |
1309 | int i; | |
1310 | for (i = 0; environ[i]; i++) | |
1311 | { | |
1312 | char *name = xstrdup (environ[i]); | |
1313 | char *value = strchr (name, '='); | |
974b73e8 KL |
1314 | SEND_STRING ("-env "); |
1315 | SEND_QUOTED (environ[i]); | |
1316 | SEND_STRING (" "); | |
59e085e0 KL |
1317 | } |
1318 | } | |
9002956f | 1319 | |
2828d5f9 KL |
1320 | /* Send over our current directory. */ |
1321 | if (!current_frame) | |
1322 | { | |
974b73e8 KL |
1323 | SEND_STRING ("-dir "); |
1324 | SEND_QUOTED (cwd); | |
1325 | SEND_STRING ("/"); | |
1326 | SEND_STRING (" "); | |
2828d5f9 KL |
1327 | } |
1328 | ||
6afdd335 | 1329 | retry: |
5212210c | 1330 | if (nowait) |
aa0b6932 | 1331 | SEND_STRING ("-nowait "); |
292d74a3 | 1332 | |
92071250 | 1333 | if (current_frame) |
974b73e8 | 1334 | SEND_STRING ("-current-frame "); |
92071250 | 1335 | |
30be2360 | 1336 | if (display) |
87209357 | 1337 | { |
aa0b6932 JB |
1338 | SEND_STRING ("-display "); |
1339 | SEND_QUOTED (display); | |
1340 | SEND_STRING (" "); | |
87209357 | 1341 | } |
30be2360 | 1342 | |
77134727 | 1343 | if (tty) |
9628b887 | 1344 | { |
b2ff54a0 JR |
1345 | char *tty_name = NULL; |
1346 | #ifndef WINDOWSNT | |
1347 | tty_name = ttyname (fileno (stdin)); | |
1348 | #endif | |
2fc0cf2a | 1349 | char *type = getenv ("TERM"); |
0b0d3e0b | 1350 | |
4d553a13 | 1351 | if (! tty_name) |
2fc0cf2a | 1352 | { |
974b73e8 | 1353 | message (TRUE, "%s: could not get terminal name\n", progname); |
2fc0cf2a KL |
1354 | fail (); |
1355 | } | |
1356 | ||
1357 | if (! type) | |
1358 | { | |
974b73e8 | 1359 | message (TRUE, "%s: please set the TERM variable to your terminal type\n", |
2fc0cf2a KL |
1360 | progname); |
1361 | fail (); | |
1362 | } | |
1363 | ||
1364 | if (! strcmp (type, "eterm")) | |
1365 | { | |
1366 | /* This causes nasty, MULTI_KBOARD-related input lockouts. */ | |
974b73e8 | 1367 | message (TRUE, "%s: opening a frame in an Emacs term buffer" |
2fc0cf2a KL |
1368 | " is not supported\n", progname); |
1369 | fail (); | |
1370 | } | |
b2ff54a0 | 1371 | #if !defined (NO_SOCKETS_IN_FILE_SYSTEM) |
4d553a13 | 1372 | init_signals (); |
b2ff54a0 | 1373 | #endif |
0b0d3e0b | 1374 | |
974b73e8 KL |
1375 | SEND_STRING ("-tty "); |
1376 | SEND_QUOTED (tty_name); | |
1377 | SEND_STRING (" "); | |
1378 | SEND_QUOTED (type); | |
1379 | SEND_STRING (" "); | |
9628b887 | 1380 | } |
77134727 KL |
1381 | |
1382 | if (window_system) | |
974b73e8 | 1383 | SEND_STRING ("-window-system "); |
0b0d3e0b | 1384 | |
87209357 | 1385 | if ((argc - optind > 0)) |
5212210c | 1386 | { |
87209357 | 1387 | for (i = optind; i < argc; i++) |
46cec291 | 1388 | { |
0b0d3e0b KL |
1389 | int relative = 0; |
1390 | ||
87209357 | 1391 | if (eval) |
0b0d3e0b | 1392 | { |
974b73e8 KL |
1393 | /* Don't prepend cwd or anything like that. */ |
1394 | SEND_STRING ("-eval "); | |
1395 | SEND_QUOTED (argv[i]); | |
1396 | SEND_STRING (" "); | |
0b0d3e0b KL |
1397 | continue; |
1398 | } | |
1399 | ||
1400 | if (*argv[i] == '+') | |
1401 | { | |
87209357 EZ |
1402 | char *p = argv[i] + 1; |
1403 | while (isdigit ((unsigned char) *p) || *p == ':') p++; | |
0b0d3e0b KL |
1404 | if (*p == 0) |
1405 | { | |
974b73e8 KL |
1406 | SEND_STRING ("-position "); |
1407 | SEND_QUOTED (argv[i]); | |
1408 | SEND_STRING (" "); | |
0b0d3e0b KL |
1409 | continue; |
1410 | } | |
1411 | else | |
1412 | relative = 1; | |
1413 | } | |
b03d27bd | 1414 | else if (! file_name_absolute_p (argv[i])) |
0b0d3e0b KL |
1415 | relative = 1; |
1416 | ||
974b73e8 | 1417 | SEND_STRING ("-file "); |
0b0d3e0b KL |
1418 | if (relative) |
1419 | { | |
974b73e8 KL |
1420 | SEND_QUOTED (cwd); |
1421 | SEND_STRING ("/"); | |
0b0d3e0b | 1422 | } |
974b73e8 KL |
1423 | SEND_QUOTED (argv[i]); |
1424 | SEND_STRING (" "); | |
0b0d3e0b | 1425 | } |
46cec291 | 1426 | } |
87209357 EZ |
1427 | else |
1428 | { | |
77134727 | 1429 | if (!tty && !window_system) |
9628b887 KL |
1430 | { |
1431 | while ((str = fgets (string, BUFSIZ, stdin))) | |
1432 | { | |
0b0d3e0b | 1433 | if (eval) |
974b73e8 | 1434 | SEND_STRING ("-eval "); |
0b0d3e0b | 1435 | else |
974b73e8 | 1436 | SEND_STRING ("-file "); |
382707ec | 1437 | SEND_QUOTED (str); |
9628b887 | 1438 | } |
974b73e8 | 1439 | SEND_STRING (" "); |
9628b887 | 1440 | } |
87209357 | 1441 | } |
0b0d3e0b | 1442 | |
aa0b6932 | 1443 | SEND_STRING ("\n"); |
46cec291 | 1444 | |
fc2040c0 KL |
1445 | /* Wait for an answer. */ |
1446 | if (!eval && !tty && !nowait) | |
30be2360 SM |
1447 | { |
1448 | printf ("Waiting for Emacs..."); | |
1449 | needlf = 2; | |
1450 | } | |
46cec291 | 1451 | fflush (stdout); |
0b0d3e0b | 1452 | fsync (1); |
46cec291 | 1453 | |
3cf8c6aa | 1454 | /* Now, wait for an answer and print any messages. */ |
4b7b77f6 | 1455 | while ((rl = recv (emacs_socket, string, BUFSIZ, 0)) > 0) |
3cf8c6aa | 1456 | { |
974b73e8 KL |
1457 | char *p; |
1458 | string[rl] = '\0'; | |
1459 | ||
1460 | p = string + strlen (string) - 1; | |
1461 | while (p > string && *p == '\n') | |
0b0d3e0b KL |
1462 | *p-- = 0; |
1463 | ||
974b73e8 | 1464 | if (strprefix ("-good-version ", string)) |
a9298135 | 1465 | { |
6afdd335 | 1466 | /* -good-version: The versions match. */ |
a9298135 | 1467 | } |
974b73e8 | 1468 | else if (strprefix ("-emacs-pid ", string)) |
4d553a13 | 1469 | { |
6afdd335 | 1470 | /* -emacs-pid PID: The process id of the Emacs process. */ |
77134727 KL |
1471 | emacs_pid = strtol (string + strlen ("-emacs-pid"), NULL, 10); |
1472 | } | |
974b73e8 | 1473 | else if (strprefix ("-window-system-unsupported ", string)) |
6afdd335 KL |
1474 | { |
1475 | /* -window-system-unsupported: Emacs was compiled without X | |
1476 | support. Try again on the terminal. */ | |
1477 | window_system = 0; | |
1478 | nowait = 0; | |
1479 | tty = 1; | |
1480 | goto retry; | |
1481 | } | |
974b73e8 | 1482 | else if (strprefix ("-print ", string)) |
77134727 | 1483 | { |
6afdd335 | 1484 | /* -print STRING: Print STRING on the terminal. */ |
974b73e8 | 1485 | str = unquote_argument (string + strlen ("-print ")); |
0b0d3e0b | 1486 | if (needlf) |
77134727 | 1487 | printf ("\n"); |
0b0d3e0b KL |
1488 | printf ("%s", str); |
1489 | needlf = str[0] == '\0' ? needlf : str[strlen (str) - 1] != '\n'; | |
77134727 | 1490 | } |
974b73e8 | 1491 | else if (strprefix ("-error ", string)) |
77134727 | 1492 | { |
6afdd335 | 1493 | /* -error DESCRIPTION: Signal an error on the terminal. */ |
974b73e8 | 1494 | str = unquote_argument (string + strlen ("-error ")); |
0b0d3e0b KL |
1495 | if (needlf) |
1496 | printf ("\n"); | |
974b73e8 | 1497 | fprintf (stderr, "*ERROR*: %s", str); |
0b0d3e0b KL |
1498 | needlf = str[0] == '\0' ? needlf : str[strlen (str) - 1] != '\n'; |
1499 | } | |
b2ff54a0 | 1500 | #ifndef WINDOWSNT |
382707ec | 1501 | else if (strprefix ("-suspend ", string)) |
0b0d3e0b | 1502 | { |
6afdd335 | 1503 | /* -suspend: Suspend this terminal, i.e., stop the process. */ |
0b0d3e0b | 1504 | if (needlf) |
77134727 | 1505 | printf ("\n"); |
0b0d3e0b KL |
1506 | needlf = 0; |
1507 | kill (0, SIGSTOP); | |
4d553a13 | 1508 | } |
b2ff54a0 | 1509 | #endif |
4d553a13 KL |
1510 | else |
1511 | { | |
6afdd335 | 1512 | /* Unknown command. */ |
0b0d3e0b | 1513 | if (needlf) |
4d553a13 | 1514 | printf ("\n"); |
974b73e8 KL |
1515 | printf ("*ERROR*: Unknown message: %s", string); |
1516 | needlf = string[0] == '\0' ? needlf : string[strlen (string) - 1] != '\n'; | |
4d553a13 | 1517 | } |
3cf8c6aa SM |
1518 | } |
1519 | ||
1520 | if (needlf) | |
1521 | printf ("\n"); | |
1522 | fflush (stdout); | |
0b0d3e0b | 1523 | fsync (1); |
23a7488d | 1524 | |
4b7b77f6 | 1525 | CLOSE_SOCKET (emacs_socket); |
65396510 | 1526 | return EXIT_SUCCESS; |
46cec291 RS |
1527 | } |
1528 | ||
1e7823d0 | 1529 | #endif /* HAVE_SOCKETS && HAVE_INET_SOCKETS */ |
aa0b6932 | 1530 | |
27711600 RM |
1531 | \f |
1532 | #ifndef HAVE_STRERROR | |
1533 | char * | |
1534 | strerror (errnum) | |
1535 | int errnum; | |
1536 | { | |
1537 | extern char *sys_errlist[]; | |
1538 | extern int sys_nerr; | |
1539 | ||
1540 | if (errnum >= 0 && errnum < sys_nerr) | |
1541 | return sys_errlist[errnum]; | |
1542 | return (char *) "Unknown error"; | |
1543 | } | |
1544 | ||
1545 | #endif /* ! HAVE_STRERROR */ | |
ab5796a9 MB |
1546 | |
1547 | /* arch-tag: f39bb9c4-73eb-477e-896d-50832e2ca9a7 | |
1548 | (do not change this comment) */ | |
65396510 TTN |
1549 | |
1550 | /* emacsclient.c ends here */ |