Commit | Line | Data |
---|---|---|
efb859b4 | 1 | /* Client process that communicates with GNU Emacs acting as server. |
9374581a GM |
2 | |
3 | Copyright (C) 1986-1987, 1994, 1999-2012 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 | ||
2f8fe2f4 | 21 | #include <config.h> |
e69233c2 | 22 | |
aa0b6932 | 23 | #ifdef WINDOWSNT |
aa0b6932 | 24 | |
79432772 | 25 | /* ms-w32.h defines these, which disables sockets altogether! */ |
bc28de71 JB |
26 | # undef _WINSOCKAPI_ |
27 | # undef _WINSOCK_H | |
28 | ||
411b80a5 JB |
29 | # include <malloc.h> |
30 | # include <stdlib.h> | |
42073bfb | 31 | # include <windows.h> |
dbf60b07 | 32 | # include <commctrl.h> |
0613f5d5 DN |
33 | # include <io.h> |
34 | # include <winsock2.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 | 41 | |
728a982d DN |
42 | char *w32_getenv (char *); |
43 | #define egetenv(VAR) w32_getenv(VAR) | |
44 | ||
411b80a5 JB |
45 | #else /* !WINDOWSNT */ |
46 | ||
5e0944c6 DC |
47 | # ifdef HAVE_NTGUI |
48 | # include <windows.h> | |
49 | # endif /* HAVE_NTGUI */ | |
50 | ||
67c1df01 | 51 | # include "syswait.h" |
ed4a3730 | 52 | |
1e7823d0 JB |
53 | # ifdef HAVE_INET_SOCKETS |
54 | # include <netinet/in.h> | |
0613f5d5 DN |
55 | # ifdef HAVE_SOCKETS |
56 | # include <sys/types.h> | |
57 | # include <sys/socket.h> | |
58 | # include <sys/un.h> | |
59 | # endif /* HAVE_SOCKETS */ | |
1e7823d0 | 60 | # endif |
18d2ad29 | 61 | # include <arpa/inet.h> |
448d4085 | 62 | |
e35fc962 | 63 | # define INVALID_SOCKET -1 |
aa0b6932 JB |
64 | # define HSOCKET int |
65 | # define CLOSE_SOCKET close | |
aa0b6932 | 66 | # define INITIALIZE() |
411b80a5 | 67 | |
5445ab06 DN |
68 | # ifndef WCONTINUED |
69 | # define WCONTINUED 8 | |
70 | # endif | |
71 | ||
728a982d DN |
72 | #define egetenv(VAR) getenv(VAR) |
73 | ||
411b80a5 | 74 | #endif /* !WINDOWSNT */ |
aa0b6932 | 75 | |
4e23f2ba | 76 | #undef signal |
46cec291 | 77 | |
42073bfb | 78 | #include <stdarg.h> |
e69233c2 | 79 | #include <ctype.h> |
8f9aaa0a | 80 | #include <stdio.h> |
613f7bda | 81 | #include <getopt.h> |
4004364e | 82 | #include <unistd.h> |
8f9aaa0a | 83 | |
0613f5d5 | 84 | #include <pwd.h> |
dc4a4a14 | 85 | #include <sys/stat.h> |
9628b887 | 86 | #include <signal.h> |
4d553a13 | 87 | #include <errno.h> |
9628b887 | 88 | |
0613f5d5 | 89 | |
9628b887 | 90 | \f |
873fbd0b | 91 | char *getenv (const char *), *getwd (char *); |
35a7804d JB |
92 | #ifdef HAVE_GETCWD |
93 | char *(getcwd) (char *, size_t); | |
94 | #endif | |
8f9aaa0a | 95 | |
8f9aaa0a RS |
96 | #ifndef VERSION |
97 | #define VERSION "unspecified" | |
98 | #endif | |
99 | \f | |
aa0b6932 JB |
100 | |
101 | #ifndef EXIT_SUCCESS | |
102 | #define EXIT_SUCCESS 0 | |
103 | #endif | |
104 | ||
105 | #ifndef EXIT_FAILURE | |
106 | #define EXIT_FAILURE 1 | |
107 | #endif | |
108 | ||
109 | #ifndef FALSE | |
110 | #define FALSE 0 | |
111 | #endif | |
112 | ||
113 | #ifndef TRUE | |
114 | #define TRUE 1 | |
115 | #endif | |
116 | ||
bc558f3e JB |
117 | /* Additional space when allocating buffers for filenames, etc. */ |
118 | #define EXTRA_SPACE 100 | |
119 | ||
069a7756 JB |
120 | #ifdef min |
121 | #undef min | |
122 | #endif | |
1e6f32f8 JM |
123 | #define min(x, y) (((x) < (y)) ? (x) : (y)) |
124 | ||
aa0b6932 | 125 | \f |
8f9aaa0a | 126 | /* Name used to invoke this program. */ |
728a982d | 127 | const char *progname; |
8f9aaa0a | 128 | |
0a125897 KL |
129 | /* The second argument to main. */ |
130 | char **main_argv; | |
131 | ||
749ae770 | 132 | /* Nonzero means don't wait for a response from Emacs. --no-wait. */ |
8f9aaa0a RS |
133 | int nowait = 0; |
134 | ||
0b973fc5 DW |
135 | /* Nonzero means don't print messages for successful operations. --quiet. */ |
136 | int quiet = 0; | |
137 | ||
30be2360 SM |
138 | /* Nonzero means args are expressions to be evaluated. --eval. */ |
139 | int eval = 0; | |
140 | ||
31fa6595 SM |
141 | /* Nonzero means don't open a new frame. Inverse of --create-frame. */ |
142 | int current_frame = 1; | |
92071250 | 143 | |
30be2360 | 144 | /* The display on which Emacs should work. --display. */ |
988e88ab | 145 | const char *display = NULL; |
30be2360 | 146 | |
6b59694e DC |
147 | /* The alternate display we should try if Emacs does not support display. */ |
148 | const char *alt_display = NULL; | |
149 | ||
0191e222 CY |
150 | /* The parent window ID, if we are opening a frame via XEmbed. */ |
151 | char *parent_id = NULL; | |
152 | ||
9628b887 | 153 | /* Nonzero means open a new Emacs frame on the current terminal. */ |
77134727 | 154 | int tty = 0; |
9628b887 | 155 | |
30be2360 SM |
156 | /* If non-NULL, the name of an editor to fallback to if the server |
157 | is not running. --alternate-editor. */ | |
b03d27bd | 158 | const char *alternate_editor = NULL; |
30be2360 | 159 | |
3db926be | 160 | /* If non-NULL, the filename of the UNIX socket. */ |
6b0c8984 | 161 | const char *socket_name = NULL; |
254107e4 | 162 | |
aa0b6932 | 163 | /* If non-NULL, the filename of the authentication file. */ |
988e88ab | 164 | const char *server_file = NULL; |
aa0b6932 | 165 | |
c66648e0 JB |
166 | /* PID of the Emacs server process. */ |
167 | int emacs_pid = 0; | |
168 | ||
18a4ce5e AR |
169 | /* If non-NULL, a string that should form a frame parameter alist to |
170 | be used for the new frame */ | |
171 | const char *frame_parameters = NULL; | |
172 | ||
845ca893 | 173 | static _Noreturn void print_help_and_exit (void); |
68441b90 | 174 | |
7f3bff3e | 175 | |
8f9aaa0a RS |
176 | struct option longopts[] = |
177 | { | |
749ae770 | 178 | { "no-wait", no_argument, NULL, 'n' }, |
0b973fc5 | 179 | { "quiet", no_argument, NULL, 'q' }, |
30be2360 | 180 | { "eval", no_argument, NULL, 'e' }, |
8f9aaa0a RS |
181 | { "help", no_argument, NULL, 'H' }, |
182 | { "version", no_argument, NULL, 'V' }, | |
b28c910d | 183 | { "tty", no_argument, NULL, 't' }, |
dc1cd5f7 | 184 | { "nw", no_argument, NULL, 't' }, |
31fa6595 | 185 | { "create-frame", no_argument, NULL, 'c' }, |
3cf8c6aa | 186 | { "alternate-editor", required_argument, NULL, 'a' }, |
18a4ce5e | 187 | { "frame-parameters", required_argument, NULL, 'F' }, |
b03d27bd | 188 | #ifndef NO_SOCKETS_IN_FILE_SYSTEM |
254107e4 | 189 | { "socket-name", required_argument, NULL, 's' }, |
b03d27bd | 190 | #endif |
aa0b6932 | 191 | { "server-file", required_argument, NULL, 'f' }, |
30be2360 | 192 | { "display", required_argument, NULL, 'd' }, |
0191e222 | 193 | { "parent-id", required_argument, NULL, 'p' }, |
30be2360 | 194 | { 0, 0, 0, 0 } |
8f9aaa0a RS |
195 | }; |
196 | ||
974b73e8 KL |
197 | \f |
198 | /* Like malloc but get fatal error if memory is exhausted. */ | |
199 | ||
17107bb6 PE |
200 | static void * |
201 | xmalloc (size_t size) | |
974b73e8 | 202 | { |
17107bb6 | 203 | void *result = malloc (size); |
974b73e8 KL |
204 | if (result == NULL) |
205 | { | |
206 | perror ("malloc"); | |
207 | exit (EXIT_FAILURE); | |
208 | } | |
209 | return result; | |
210 | } | |
211 | ||
974b73e8 KL |
212 | /* From sysdep.c */ |
213 | #if !defined (HAVE_GET_CURRENT_DIR_NAME) || defined (BROKEN_GET_CURRENT_DIR_NAME) | |
214 | ||
c5443aa5 | 215 | char *get_current_dir_name (void); |
cb06b8dc | 216 | |
974b73e8 | 217 | /* Return the current working directory. Returns NULL on errors. |
5ab73228 | 218 | Any other returned value must be freed with free. This is used |
974b73e8 KL |
219 | only when get_current_dir_name is not defined on the system. */ |
220 | char* | |
7c3320d8 | 221 | get_current_dir_name (void) |
974b73e8 KL |
222 | { |
223 | char *buf; | |
b9170155 | 224 | const char *pwd; |
974b73e8 KL |
225 | struct stat dotstat, pwdstat; |
226 | /* If PWD is accurate, use it instead of calling getwd. PWD is | |
227 | sometimes a nicer name, and using it may avoid a fatal error if a | |
228 | parent directory is searchable but not readable. */ | |
7ce8671d | 229 | if ((pwd = egetenv ("PWD")) != 0 |
974b73e8 KL |
230 | && (IS_DIRECTORY_SEP (*pwd) || (*pwd && IS_DEVICE_SEP (pwd[1]))) |
231 | && stat (pwd, &pwdstat) == 0 | |
232 | && stat (".", &dotstat) == 0 | |
233 | && dotstat.st_ino == pwdstat.st_ino | |
234 | && dotstat.st_dev == pwdstat.st_dev | |
235 | #ifdef MAXPATHLEN | |
236 | && strlen (pwd) < MAXPATHLEN | |
237 | #endif | |
238 | ) | |
239 | { | |
240 | buf = (char *) xmalloc (strlen (pwd) + 1); | |
974b73e8 KL |
241 | strcpy (buf, pwd); |
242 | } | |
243 | #ifdef HAVE_GETCWD | |
244 | else | |
245 | { | |
246 | size_t buf_size = 1024; | |
974b73e8 KL |
247 | for (;;) |
248 | { | |
17107bb6 PE |
249 | int tmp_errno; |
250 | buf = malloc (buf_size); | |
251 | if (! buf) | |
252 | break; | |
974b73e8 KL |
253 | if (getcwd (buf, buf_size) == buf) |
254 | break; | |
17107bb6 PE |
255 | tmp_errno = errno; |
256 | free (buf); | |
257 | if (tmp_errno != ERANGE) | |
974b73e8 | 258 | { |
974b73e8 KL |
259 | errno = tmp_errno; |
260 | return NULL; | |
261 | } | |
262 | buf_size *= 2; | |
17107bb6 PE |
263 | if (! buf_size) |
264 | { | |
265 | errno = ENOMEM; | |
266 | return NULL; | |
267 | } | |
974b73e8 KL |
268 | } |
269 | } | |
270 | #else | |
271 | else | |
272 | { | |
273 | /* We need MAXPATHLEN here. */ | |
274 | buf = (char *) xmalloc (MAXPATHLEN + 1); | |
974b73e8 KL |
275 | if (getwd (buf) == NULL) |
276 | { | |
277 | int tmp_errno = errno; | |
278 | free (buf); | |
279 | errno = tmp_errno; | |
280 | return NULL; | |
281 | } | |
282 | } | |
283 | #endif | |
284 | return buf; | |
285 | } | |
286 | #endif | |
287 | ||
42073bfb | 288 | #ifdef WINDOWSNT |
7ce8671d | 289 | |
a54af40e EZ |
290 | /* Like strdup but get a fatal error if memory is exhausted. */ |
291 | ||
292 | char * | |
293 | xstrdup (const char *s) | |
294 | { | |
295 | char *result = strdup (s); | |
296 | if (result == NULL) | |
297 | { | |
298 | perror ("strdup"); | |
299 | exit (EXIT_FAILURE); | |
300 | } | |
301 | return result; | |
302 | } | |
303 | ||
7ce8671d JB |
304 | #define REG_ROOT "SOFTWARE\\GNU\\Emacs" |
305 | ||
306 | /* Retrieve an environment variable from the Emacs subkeys of the registry. | |
307 | Return NULL if the variable was not found, or it was empty. | |
308 | This code is based on w32_get_resource (w32.c). */ | |
309 | char * | |
7c3320d8 | 310 | w32_get_resource (HKEY predefined, char *key, LPDWORD type) |
7ce8671d JB |
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 | ||
a54af40e EZ |
339 | Value is allocated on the heap, and can be free'd. |
340 | ||
341 | This is needed to duplicate Emacs's behavior, which is to look for | |
342 | environment variables in the registry if they don't appear in the | |
343 | environment. */ | |
7ce8671d | 344 | char * |
7c3320d8 | 345 | w32_getenv (char *envvar) |
7ce8671d JB |
346 | { |
347 | char *value; | |
348 | DWORD dwType; | |
349 | ||
657d08d3 | 350 | if ((value = getenv (envvar))) |
a54af40e EZ |
351 | /* Found in the environment. strdup it, because values returned |
352 | by getenv cannot be free'd. */ | |
353 | return xstrdup (value); | |
7ce8671d JB |
354 | |
355 | if (! (value = w32_get_resource (HKEY_CURRENT_USER, envvar, &dwType)) && | |
356 | ! (value = w32_get_resource (HKEY_LOCAL_MACHINE, envvar, &dwType))) | |
d41784ee EZ |
357 | { |
358 | /* "w32console" is what Emacs on Windows uses for tty-type under -nw. */ | |
359 | if (strcmp (envvar, "TERM") == 0) | |
a54af40e | 360 | return xstrdup ("w32console"); |
d41784ee EZ |
361 | /* Found neither in the environment nor in the registry. */ |
362 | return NULL; | |
363 | } | |
7ce8671d JB |
364 | |
365 | if (dwType == REG_SZ) | |
366 | /* Registry; no need to expand. */ | |
367 | return value; | |
368 | ||
369 | if (dwType == REG_EXPAND_SZ) | |
370 | { | |
371 | DWORD size; | |
372 | ||
657d08d3 | 373 | if ((size = ExpandEnvironmentStrings (value, NULL, 0))) |
7ce8671d JB |
374 | { |
375 | char *buffer = (char *) xmalloc (size); | |
376 | if (ExpandEnvironmentStrings (value, buffer, size)) | |
377 | { | |
378 | /* Found and expanded. */ | |
379 | free (value); | |
380 | return buffer; | |
381 | } | |
382 | ||
383 | /* Error expanding. */ | |
384 | free (buffer); | |
385 | } | |
386 | } | |
387 | ||
388 | /* Not the right type, or not correctly expanded. */ | |
389 | free (value); | |
390 | return NULL; | |
391 | } | |
392 | ||
ff90fbde | 393 | |
42073bfb | 394 | int |
7c3320d8 | 395 | w32_window_app (void) |
42073bfb JB |
396 | { |
397 | static int window_app = -1; | |
398 | char szTitle[MAX_PATH]; | |
399 | ||
400 | if (window_app < 0) | |
dbf60b07 JR |
401 | { |
402 | /* Checking for STDOUT does not work; it's a valid handle also in | |
403 | nonconsole apps. Testing for the console title seems to work. */ | |
404 | window_app = (GetConsoleTitleA (szTitle, MAX_PATH) == 0); | |
405 | if (window_app) | |
361358ea | 406 | InitCommonControls (); |
dbf60b07 | 407 | } |
42073bfb JB |
408 | |
409 | return window_app; | |
410 | } | |
105faa84 | 411 | |
79432772 | 412 | /* execvp wrapper for Windows. Quotes arguments with embedded spaces. |
105faa84 DN |
413 | |
414 | This is necessary due to the broken implementation of exec* routines in | |
415 | the Microsoft libraries: they concatenate the arguments together without | |
416 | quoting special characters, and pass the result to CreateProcess, with | |
7c3320d8 | 417 | predictably bad results. By contrast, POSIX execvp passes the arguments |
79432772 JB |
418 | directly into the argv array of the child process. */ |
419 | ||
105faa84 | 420 | int |
7c3320d8 | 421 | w32_execvp (const char *path, char **argv) |
105faa84 DN |
422 | { |
423 | int i; | |
ad0a19b7 | 424 | extern int execvp (const char*, char **); |
105faa84 DN |
425 | |
426 | /* Required to allow a .BAT script as alternate editor. */ | |
427 | argv[0] = (char *) alternate_editor; | |
428 | ||
429 | for (i = 0; argv[i]; i++) | |
430 | if (strchr (argv[i], ' ')) | |
431 | { | |
432 | char *quoted = alloca (strlen (argv[i]) + 3); | |
433 | sprintf (quoted, "\"%s\"", argv[i]); | |
434 | argv[i] = quoted; | |
435 | } | |
436 | ||
437 | return execvp (path, argv); | |
438 | } | |
439 | ||
440 | #undef execvp | |
441 | #define execvp w32_execvp | |
442 | ||
d41784ee EZ |
443 | /* Emulation of ttyname for Windows. */ |
444 | char * | |
445 | ttyname (int fd) | |
446 | { | |
447 | return "CONOUT$"; | |
448 | } | |
449 | ||
105faa84 | 450 | #endif /* WINDOWSNT */ |
42073bfb | 451 | |
f387c1ee JB |
452 | /* Display a normal or error message. |
453 | On Windows, use a message box if compiled as a Windows app. */ | |
72b04a8a | 454 | static void message (int, const char *, ...) ATTRIBUTE_FORMAT_PRINTF (2, 3); |
b23b5a5b | 455 | static void |
b0bbc07d | 456 | message (int is_error, const char *format, ...) |
42073bfb | 457 | { |
42073bfb JB |
458 | va_list args; |
459 | ||
b0bbc07d | 460 | va_start (args, format); |
42073bfb JB |
461 | |
462 | #ifdef WINDOWSNT | |
463 | if (w32_window_app ()) | |
464 | { | |
17107bb6 PE |
465 | char msg[2048]; |
466 | vsnprintf (msg, sizeof msg, format, args); | |
467 | msg[sizeof msg - 1] = '\0'; | |
468 | ||
42073bfb JB |
469 | if (is_error) |
470 | MessageBox (NULL, msg, "Emacsclient ERROR", MB_ICONERROR); | |
471 | else | |
472 | MessageBox (NULL, msg, "Emacsclient", MB_ICONINFORMATION); | |
473 | } | |
474 | else | |
475 | #endif | |
9219db75 JB |
476 | { |
477 | FILE *f = is_error ? stderr : stdout; | |
478 | ||
17107bb6 | 479 | vfprintf (f, format, args); |
9219db75 JB |
480 | fflush (f); |
481 | } | |
17107bb6 PE |
482 | |
483 | va_end (args); | |
42073bfb JB |
484 | } |
485 | ||
8f9aaa0a | 486 | /* Decode the options from argv and argc. |
5212210c | 487 | The global variable `optind' will say how many arguments we used up. */ |
8f9aaa0a | 488 | |
b23b5a5b | 489 | static void |
873fbd0b | 490 | decode_options (int argc, char **argv) |
8f9aaa0a | 491 | { |
7ce8671d | 492 | alternate_editor = egetenv ("ALTERNATE_EDITOR"); |
0ea5797a | 493 | |
8f9aaa0a RS |
494 | while (1) |
495 | { | |
dc1cd5f7 | 496 | int opt = getopt_long_only (argc, argv, |
b03d27bd | 497 | #ifndef NO_SOCKETS_IN_FILE_SYSTEM |
3794a2d3 | 498 | "VHneqa:s:f:d:F:tc", |
b03d27bd | 499 | #else |
3794a2d3 | 500 | "VHneqa:f:d:F:tc", |
b03d27bd | 501 | #endif |
974b73e8 | 502 | longopts, 0); |
8f9aaa0a RS |
503 | |
504 | if (opt == EOF) | |
505 | break; | |
506 | ||
507 | switch (opt) | |
508 | { | |
509 | case 0: | |
510 | /* If getopt returns 0, then it has already processed a | |
511 | long-named option. We should do nothing. */ | |
512 | break; | |
e69233c2 | 513 | |
97e3214d GM |
514 | case 'a': |
515 | alternate_editor = optarg; | |
516 | break; | |
e69233c2 | 517 | |
b03d27bd | 518 | #ifndef NO_SOCKETS_IN_FILE_SYSTEM |
254107e4 RS |
519 | case 's': |
520 | socket_name = optarg; | |
521 | break; | |
b03d27bd | 522 | #endif |
254107e4 | 523 | |
aa0b6932 JB |
524 | case 'f': |
525 | server_file = optarg; | |
526 | break; | |
254107e4 | 527 | |
0ea5797a SM |
528 | /* We used to disallow this argument in w32, but it seems better |
529 | to allow it, for the occasional case where the user is | |
530 | connecting with a w32 client to a server compiled with X11 | |
531 | support. */ | |
30be2360 SM |
532 | case 'd': |
533 | display = optarg; | |
534 | break; | |
535 | ||
8f9aaa0a RS |
536 | case 'n': |
537 | nowait = 1; | |
538 | break; | |
539 | ||
30be2360 SM |
540 | case 'e': |
541 | eval = 1; | |
542 | break; | |
543 | ||
0b973fc5 DW |
544 | case 'q': |
545 | quiet = 1; | |
546 | break; | |
547 | ||
8f9aaa0a | 548 | case 'V': |
42073bfb | 549 | message (FALSE, "emacsclient %s\n", VERSION); |
65396510 | 550 | exit (EXIT_SUCCESS); |
8f9aaa0a | 551 | break; |
46cec291 | 552 | |
819b8f00 | 553 | case 't': |
77134727 | 554 | tty = 1; |
c1b8e896 | 555 | current_frame = 0; |
77134727 KL |
556 | break; |
557 | ||
e5299d8d | 558 | case 'c': |
31fa6595 | 559 | current_frame = 0; |
9628b887 | 560 | break; |
0b0d3e0b | 561 | |
0191e222 CY |
562 | case 'p': |
563 | parent_id = optarg; | |
564 | current_frame = 0; | |
565 | break; | |
566 | ||
8f9aaa0a | 567 | case 'H': |
8f9aaa0a | 568 | print_help_and_exit (); |
20c396e8 JB |
569 | break; |
570 | ||
18a4ce5e AR |
571 | case 'F': |
572 | frame_parameters = optarg; | |
573 | break; | |
574 | ||
20c396e8 | 575 | default: |
42073bfb | 576 | message (TRUE, "Try `%s --help' for more information\n", progname); |
65396510 | 577 | exit (EXIT_FAILURE); |
20c396e8 | 578 | break; |
8f9aaa0a RS |
579 | } |
580 | } | |
9628b887 | 581 | |
273b9028 CY |
582 | /* If the -c option is used (without -t) and no --display argument |
583 | is provided, try $DISPLAY. | |
584 | Without the -c option, we used to set `display' to $DISPLAY by | |
585 | default, but this changed the default behavior and is sometimes | |
586 | inconvenient. So we force users to use "--display $DISPLAY" if | |
6b59694e DC |
587 | they want Emacs to connect to their current display. |
588 | ||
589 | Some window systems have a notion of default display not | |
590 | reflected in the DISPLAY variable. If the user didn't give us an | |
591 | explicit display, try this platform-specific after trying the | |
592 | display in DISPLAY (if any). */ | |
09317bf4 | 593 | if (!current_frame && !tty && !display) |
e7534fc4 | 594 | { |
6b59694e DC |
595 | /* Set these here so we use a default_display only when the user |
596 | didn't give us an explicit display. */ | |
597 | #if defined (NS_IMPL_COCOA) | |
598 | alt_display = "ns"; | |
599 | #elif defined (HAVE_NTGUI) | |
efc3dd3c | 600 | alt_display = "w32"; |
e7534fc4 | 601 | #endif |
6b59694e DC |
602 | |
603 | display = egetenv ("DISPLAY"); | |
604 | } | |
605 | ||
606 | if (!display) | |
607 | { | |
608 | display = alt_display; | |
609 | alt_display = NULL; | |
e7534fc4 | 610 | } |
9997dc15 | 611 | |
273b9028 | 612 | /* A null-string display is invalid. */ |
0ea5797a SM |
613 | if (display && strlen (display) == 0) |
614 | display = NULL; | |
615 | ||
273b9028 CY |
616 | /* If no display is available, new frames are tty frames. */ |
617 | if (!current_frame && !display) | |
92071250 | 618 | tty = 1; |
c0f342ab | 619 | |
802bdb3c | 620 | #ifdef WINDOWSNT |
9a864fa2 CY |
621 | /* Emacs on Windows does not support graphical and text terminal |
622 | frames in the same instance. So, treat the -t and -c options as | |
623 | equivalent, and open a new frame on the server's terminal. | |
624 | Ideally, we would only set tty = 1 when the serve is running in a | |
625 | console, but alas we don't know that. As a workaround, always | |
626 | ask for a tty frame, and let server.el figure it out. */ | |
627 | if (!current_frame) | |
628 | { | |
629 | display = NULL; | |
630 | tty = 1; | |
631 | } | |
632 | ||
69157c99 | 633 | if (alternate_editor && alternate_editor[0] == '\0') |
802bdb3c DN |
634 | { |
635 | message (TRUE, "--alternate-editor argument or ALTERNATE_EDITOR variable cannot be\n\ | |
636 | an empty string"); | |
637 | exit (EXIT_FAILURE); | |
638 | } | |
639 | #endif /* WINDOWSNT */ | |
8f9aaa0a RS |
640 | } |
641 | ||
974b73e8 | 642 | \f |
845ca893 | 643 | static _Noreturn void |
873fbd0b | 644 | print_help_and_exit (void) |
8f9aaa0a | 645 | { |
c0f342ab JB |
646 | /* Spaces and tabs are significant in this message; they're chosen so the |
647 | message aligns properly both in a tty and in a Windows message box. | |
648 | Please try to preserve them; otherwise the output is very hard to read | |
649 | when using emacsclientw. */ | |
42073bfb | 650 | message (FALSE, |
974b73e8 | 651 | "Usage: %s [OPTIONS] FILE...\n\ |
30be2360 SM |
652 | Tell the Emacs server to visit the specified files.\n\ |
653 | Every FILE can be either just a FILENAME or [+LINE[:COLUMN]] FILENAME.\n\ | |
20c396e8 | 654 | \n\ |
30be2360 | 655 | The following OPTIONS are accepted:\n\ |
c0f342ab JB |
656 | -V, --version Just print version info and return\n\ |
657 | -H, --help Print this usage information message\n\ | |
dc1cd5f7 | 658 | -nw, -t, --tty Open a new Emacs frame on the current terminal\n\ |
c4b858e3 | 659 | -c, --create-frame Create a new frame instead of trying to\n\ |
9dfda22f | 660 | use the current Emacs frame\n\ |
a150502a | 661 | -F ALIST, --frame-parameters=ALIST\n\ |
5f9388d0 | 662 | Set the parameters of a new frame\n\ |
c0f342ab | 663 | -e, --eval Evaluate the FILE arguments as ELisp expressions\n\ |
d07529f3 | 664 | -n, --no-wait Don't wait for the server to return\n\ |
0b973fc5 | 665 | -q, --quiet Don't display messages on success\n\ |
24d5010d | 666 | -d DISPLAY, --display=DISPLAY\n\ |
0191e222 CY |
667 | Visit the file in the given display\n\ |
668 | --parent-id=ID Open in parent window ID, via XEmbed\n" | |
aa0b6932 | 669 | #ifndef NO_SOCKETS_IN_FILE_SYSTEM |
24d5010d | 670 | "-s SOCKET, --socket-name=SOCKET\n\ |
9dfda22f | 671 | Set filename of the UNIX socket for communication\n" |
aa0b6932 | 672 | #endif |
24d5010d | 673 | "-f SERVER, --server-file=SERVER\n\ |
9dfda22f | 674 | Set filename of the TCP authentication file\n\ |
24d5010d | 675 | -a EDITOR, --alternate-editor=EDITOR\n\ |
9dfda22f | 676 | Editor to fallback to if the server is not running\n" |
6133a1a9 | 677 | #ifndef WINDOWSNT |
c3f995a2 JB |
678 | " If EDITOR is the empty string, start Emacs in daemon\n\ |
679 | mode and try connecting again\n" | |
6133a1a9 | 680 | #endif /* not WINDOWSNT */ |
c3f995a2 | 681 | "\n\ |
5f54cae6 | 682 | Report bugs with M-x report-emacs-bug.\n", progname); |
65396510 | 683 | exit (EXIT_SUCCESS); |
8f9aaa0a | 684 | } |
5212210c | 685 | |
79432772 JB |
686 | /* Try to run a different command, or --if no alternate editor is |
687 | defined-- exit with an errorcode. | |
688 | Uses argv, but gets it from the global variable main_argv. */ | |
689 | ||
845ca893 | 690 | static _Noreturn void |
974b73e8 | 691 | fail (void) |
9002956f | 692 | { |
aa0b6932 | 693 | if (alternate_editor) |
9002956f | 694 | { |
aa0b6932 | 695 | int i = optind - 1; |
4472aef4 | 696 | |
974b73e8 | 697 | execvp (alternate_editor, main_argv + i); |
42073bfb | 698 | message (TRUE, "%s: error executing alternate editor \"%s\"\n", |
974b73e8 | 699 | progname, alternate_editor); |
9002956f | 700 | } |
aa0b6932 | 701 | exit (EXIT_FAILURE); |
9002956f KL |
702 | } |
703 | ||
aa0b6932 | 704 | \f |
1e7823d0 | 705 | #if !defined (HAVE_SOCKETS) || !defined (HAVE_INET_SOCKETS) |
9002956f | 706 | |
aa0b6932 | 707 | int |
0613f5d5 | 708 | main (int argc, char **argv) |
9002956f | 709 | { |
974b73e8 KL |
710 | main_argv = argv; |
711 | progname = argv[0]; | |
712 | message (TRUE, "%s: Sorry, the Emacs server is supported only\n" | |
c0f342ab | 713 | "on systems with Berkeley sockets.\n", |
aa0b6932 | 714 | argv[0]); |
974b73e8 | 715 | fail (); |
9002956f KL |
716 | } |
717 | ||
1e7823d0 | 718 | #else /* HAVE_SOCKETS && HAVE_INET_SOCKETS */ |
2828d5f9 | 719 | |
aa0b6932 JB |
720 | #define AUTH_KEY_LENGTH 64 |
721 | #define SEND_BUFFER_SIZE 4096 | |
722 | ||
aa0b6932 JB |
723 | /* Buffer to accumulate data to send in TCP connections. */ |
724 | char send_buffer[SEND_BUFFER_SIZE + 1]; | |
725 | int sblen = 0; /* Fill pointer for the send buffer. */ | |
4b7b77f6 JR |
726 | /* Socket used to communicate with the Emacs server process. */ |
727 | HSOCKET emacs_socket = 0; | |
aa0b6932 | 728 | |
79432772 JB |
729 | /* On Windows, the socket library was historically separate from the |
730 | standard C library, so errors are handled differently. */ | |
731 | ||
b23b5a5b | 732 | static void |
988e88ab | 733 | sock_err_message (const char *function_name) |
d22b00e5 JR |
734 | { |
735 | #ifdef WINDOWSNT | |
736 | char* msg = NULL; | |
737 | ||
738 | FormatMessage (FORMAT_MESSAGE_FROM_SYSTEM | |
739 | | FORMAT_MESSAGE_ALLOCATE_BUFFER | |
740 | | FORMAT_MESSAGE_ARGUMENT_ARRAY, | |
741 | NULL, WSAGetLastError (), 0, (LPTSTR)&msg, 0, NULL); | |
742 | ||
743 | message (TRUE, "%s: %s: %s\n", progname, function_name, msg); | |
744 | ||
745 | LocalFree (msg); | |
746 | #else | |
747 | message (TRUE, "%s: %s: %s\n", progname, function_name, strerror (errno)); | |
748 | #endif | |
749 | } | |
750 | ||
751 | ||
aa0b6932 JB |
752 | /* Let's send the data to Emacs when either |
753 | - the data ends in "\n", or | |
754 | - the buffer is full (but this shouldn't happen) | |
755 | Otherwise, we just accumulate it. */ | |
b23b5a5b | 756 | static void |
988e88ab | 757 | send_to_emacs (HSOCKET s, const char *data) |
aa0b6932 | 758 | { |
1e6f32f8 JM |
759 | size_t dlen; |
760 | ||
761 | if (!data) | |
762 | return; | |
763 | ||
764 | dlen = strlen (data); | |
765 | while (*data) | |
2828d5f9 | 766 | { |
1e6f32f8 JM |
767 | size_t part = min (dlen, SEND_BUFFER_SIZE - sblen); |
768 | memcpy (&send_buffer[sblen], data, part); | |
769 | data += part; | |
770 | sblen += part; | |
aa0b6932 JB |
771 | |
772 | if (sblen == SEND_BUFFER_SIZE | |
773 | || (sblen > 0 && send_buffer[sblen-1] == '\n')) | |
774 | { | |
775 | int sent = send (s, send_buffer, sblen, 0); | |
1e6f32f8 JM |
776 | if (sent < 0) |
777 | { | |
778 | message (TRUE, "%s: failed to send %d bytes to socket: %s\n", | |
779 | progname, sblen, strerror (errno)); | |
780 | fail (); | |
781 | } | |
aa0b6932 | 782 | if (sent != sblen) |
1e6f32f8 | 783 | memmove (send_buffer, &send_buffer[sent], sblen - sent); |
aa0b6932 JB |
784 | sblen -= sent; |
785 | } | |
1e6f32f8 JM |
786 | |
787 | dlen -= part; | |
2828d5f9 | 788 | } |
2828d5f9 | 789 | } |
2828d5f9 KL |
790 | |
791 | \f | |
0b0d3e0b | 792 | /* In STR, insert a & before each &, each space, each newline, and |
a4cf2096 | 793 | any initial -. Change spaces to underscores, too, so that the |
0b0d3e0b KL |
794 | return value never contains a space. |
795 | ||
3a35a84c | 796 | Does not change the string. Outputs the result to S. */ |
b23b5a5b | 797 | static void |
988e88ab | 798 | quote_argument (HSOCKET s, const char *str) |
5212210c | 799 | { |
9002956f | 800 | char *copy = (char *) xmalloc (strlen (str) * 2 + 1); |
988e88ab J |
801 | const char *p; |
802 | char *q; | |
5212210c | 803 | |
0b0d3e0b | 804 | p = str; |
5212210c RS |
805 | q = copy; |
806 | while (*p) | |
807 | { | |
808 | if (*p == ' ') | |
809 | { | |
f1db6a73 | 810 | *q++ = '&'; |
5212210c RS |
811 | *q++ = '_'; |
812 | p++; | |
813 | } | |
3cf8c6aa SM |
814 | else if (*p == '\n') |
815 | { | |
816 | *q++ = '&'; | |
817 | *q++ = 'n'; | |
818 | p++; | |
819 | } | |
5212210c RS |
820 | else |
821 | { | |
0b0d3e0b | 822 | if (*p == '&' || (*p == '-' && p == str)) |
f1db6a73 | 823 | *q++ = '&'; |
5212210c RS |
824 | *q++ = *p++; |
825 | } | |
826 | } | |
f1db6a73 | 827 | *q++ = 0; |
5212210c | 828 | |
486ba65f | 829 | send_to_emacs (s, copy); |
87209357 EZ |
830 | |
831 | free (copy); | |
5212210c | 832 | } |
0c76956f | 833 | |
0b0d3e0b KL |
834 | |
835 | /* The inverse of quote_argument. Removes quoting in string STR by | |
79432772 | 836 | modifying the string in place. Returns STR. */ |
0b0d3e0b | 837 | |
b23b5a5b | 838 | static char * |
873fbd0b | 839 | unquote_argument (char *str) |
0b0d3e0b KL |
840 | { |
841 | char *p, *q; | |
842 | ||
843 | if (! str) | |
844 | return str; | |
845 | ||
846 | p = str; | |
847 | q = str; | |
848 | while (*p) | |
849 | { | |
850 | if (*p == '&') | |
851 | { | |
852 | p++; | |
853 | if (*p == '&') | |
854 | *p = '&'; | |
855 | else if (*p == '_') | |
856 | *p = ' '; | |
857 | else if (*p == 'n') | |
858 | *p = '\n'; | |
859 | else if (*p == '-') | |
860 | *p = '-'; | |
861 | } | |
862 | *q++ = *p++; | |
863 | } | |
864 | *q = 0; | |
865 | return str; | |
866 | } | |
867 | ||
8f9aaa0a | 868 | \f |
b23b5a5b | 869 | static int |
03fc768b | 870 | file_name_absolute_p (const char *filename) |
b03d27bd JB |
871 | { |
872 | /* Sanity check, it shouldn't happen. */ | |
873 | if (! filename) return FALSE; | |
874 | ||
875 | /* /xxx is always an absolute path. */ | |
876 | if (filename[0] == '/') return TRUE; | |
877 | ||
878 | /* Empty filenames (which shouldn't happen) are relative. */ | |
879 | if (filename[0] == '\0') return FALSE; | |
880 | ||
881 | #ifdef WINDOWSNT | |
71b8f735 | 882 | /* X:\xxx is always absolute. */ |
03fc768b | 883 | if (isalpha ((unsigned char) filename[0]) |
cb0297bb | 884 | && filename[1] == ':' && (filename[2] == '\\' || filename[2] == '/')) |
b03d27bd JB |
885 | return TRUE; |
886 | ||
887 | /* Both \xxx and \\xxx\yyy are absolute. */ | |
888 | if (filename[0] == '\\') return TRUE; | |
889 | #endif | |
890 | ||
891 | return FALSE; | |
892 | } | |
893 | ||
aa0b6932 | 894 | #ifdef WINDOWSNT |
f0384499 | 895 | /* Wrapper to make WSACleanup a cdecl, as required by atexit. */ |
7c3320d8 JB |
896 | void __cdecl |
897 | close_winsock (void) | |
aa0b6932 JB |
898 | { |
899 | WSACleanup (); | |
900 | } | |
0c76956f | 901 | |
b03d27bd JB |
902 | /* Initialize the WinSock2 library. */ |
903 | void | |
7c3320d8 | 904 | initialize_sockets (void) |
0c76956f | 905 | { |
aa0b6932 JB |
906 | WSADATA wsaData; |
907 | ||
aa0b6932 JB |
908 | if (WSAStartup (MAKEWORD (2, 0), &wsaData)) |
909 | { | |
78da39c6 | 910 | message (TRUE, "%s: error initializing WinSock2\n", progname); |
aa0b6932 JB |
911 | exit (EXIT_FAILURE); |
912 | } | |
913 | ||
914 | atexit (close_winsock); | |
0c76956f | 915 | } |
e35fc962 | 916 | #endif /* WINDOWSNT */ |
974b73e8 | 917 | |
8f9aaa0a | 918 | \f |
79432772 JB |
919 | /* Read the information needed to set up a TCP comm channel with |
920 | the Emacs server: host, port, and authentication string. */ | |
921 | ||
b23b5a5b | 922 | static int |
6b0c8984 AS |
923 | get_server_config (const char *config_file, struct sockaddr_in *server, |
924 | char *authentication) | |
97e3214d | 925 | { |
aa0b6932 JB |
926 | char dotted[32]; |
927 | char *port; | |
b03d27bd | 928 | FILE *config = NULL; |
aa0b6932 | 929 | |
6b0c8984 AS |
930 | if (file_name_absolute_p (config_file)) |
931 | config = fopen (config_file, "rb"); | |
b03d27bd | 932 | else |
97e3214d | 933 | { |
b9170155 | 934 | const char *home = egetenv ("HOME"); |
88b46d84 | 935 | |
aa0b6932 JB |
936 | if (home) |
937 | { | |
6b0c8984 | 938 | char *path = xmalloc (strlen (home) + strlen (config_file) |
17107bb6 PE |
939 | + EXTRA_SPACE); |
940 | strcpy (path, home); | |
941 | strcat (path, "/.emacs.d/server/"); | |
6b0c8984 | 942 | strcat (path, config_file); |
aa0b6932 | 943 | config = fopen (path, "rb"); |
17107bb6 | 944 | free (path); |
aa0b6932 | 945 | } |
88b46d84 | 946 | #ifdef WINDOWSNT |
7ce8671d | 947 | if (!config && (home = egetenv ("APPDATA"))) |
88b46d84 | 948 | { |
6b0c8984 | 949 | char *path = xmalloc (strlen (home) + strlen (config_file) |
17107bb6 PE |
950 | + EXTRA_SPACE); |
951 | strcpy (path, home); | |
952 | strcat (path, "/.emacs.d/server/"); | |
6b0c8984 | 953 | strcat (path, config_file); |
88b46d84 | 954 | config = fopen (path, "rb"); |
17107bb6 | 955 | free (path); |
88b46d84 JB |
956 | } |
957 | #endif | |
aa0b6932 JB |
958 | } |
959 | ||
960 | if (! config) | |
961 | return FALSE; | |
962 | ||
963 | if (fgets (dotted, sizeof dotted, config) | |
968ef9b4 JB |
964 | && (port = strchr (dotted, ':'))) |
965 | *port++ = '\0'; | |
97e3214d GM |
966 | else |
967 | { | |
78da39c6 | 968 | message (TRUE, "%s: invalid configuration info\n", progname); |
65396510 | 969 | exit (EXIT_FAILURE); |
97e3214d | 970 | } |
97e3214d | 971 | |
aa0b6932 JB |
972 | server->sin_family = AF_INET; |
973 | server->sin_addr.s_addr = inet_addr (dotted); | |
974 | server->sin_port = htons (atoi (port)); | |
97e3214d | 975 | |
aa0b6932 JB |
976 | if (! fread (authentication, AUTH_KEY_LENGTH, 1, config)) |
977 | { | |
78da39c6 | 978 | message (TRUE, "%s: cannot read authentication info\n", progname); |
aa0b6932 JB |
979 | exit (EXIT_FAILURE); |
980 | } | |
46cec291 | 981 | |
aa0b6932 | 982 | fclose (config); |
97e3214d | 983 | |
aa0b6932 | 984 | return TRUE; |
97e3214d GM |
985 | } |
986 | ||
b23b5a5b | 987 | static HSOCKET |
6b0c8984 | 988 | set_tcp_socket (const char *local_server_file) |
aa0b6932 JB |
989 | { |
990 | HSOCKET s; | |
991 | struct sockaddr_in server; | |
aa0b6932 JB |
992 | struct linger l_arg = {1, 1}; |
993 | char auth_string[AUTH_KEY_LENGTH + 1]; | |
9628b887 | 994 | |
6b0c8984 | 995 | if (! get_server_config (local_server_file, &server, auth_string)) |
aa0b6932 JB |
996 | return INVALID_SOCKET; |
997 | ||
0b973fc5 | 998 | if (server.sin_addr.s_addr != inet_addr ("127.0.0.1") && !quiet) |
9219db75 | 999 | message (FALSE, "%s: connected to remote socket at %s\n", |
b03d27bd JB |
1000 | progname, inet_ntoa (server.sin_addr)); |
1001 | ||
79432772 | 1002 | /* Open up an AF_INET socket. */ |
aa0b6932 JB |
1003 | if ((s = socket (AF_INET, SOCK_STREAM, IPPROTO_TCP)) < 0) |
1004 | { | |
d22b00e5 | 1005 | sock_err_message ("socket"); |
aa0b6932 JB |
1006 | return INVALID_SOCKET; |
1007 | } | |
1008 | ||
79432772 | 1009 | /* Set up the socket. */ |
aa0b6932 JB |
1010 | if (connect (s, (struct sockaddr *) &server, sizeof server) < 0) |
1011 | { | |
d22b00e5 | 1012 | sock_err_message ("connect"); |
aa0b6932 JB |
1013 | return INVALID_SOCKET; |
1014 | } | |
1015 | ||
aa0b6932 JB |
1016 | setsockopt (s, SOL_SOCKET, SO_LINGER, (char *) &l_arg, sizeof l_arg); |
1017 | ||
79432772 | 1018 | /* Send the authentication. */ |
aa0b6932 JB |
1019 | auth_string[AUTH_KEY_LENGTH] = '\0'; |
1020 | ||
486ba65f JR |
1021 | send_to_emacs (s, "-auth "); |
1022 | send_to_emacs (s, auth_string); | |
5ab73228 | 1023 | send_to_emacs (s, " "); |
aa0b6932 JB |
1024 | |
1025 | return s; | |
1026 | } | |
1027 | ||
b2ff54a0 JR |
1028 | |
1029 | /* Returns 1 if PREFIX is a prefix of STRING. */ | |
1030 | static int | |
988e88ab | 1031 | strprefix (const char *prefix, const char *string) |
b2ff54a0 | 1032 | { |
cb06b8dc | 1033 | return !strncmp (prefix, string, strlen (prefix)); |
b2ff54a0 JR |
1034 | } |
1035 | ||
a336ee5b CY |
1036 | /* Get tty name and type. If successful, return the type in TTY_TYPE |
1037 | and the name in TTY_NAME, and return 1. Otherwise, fail if NOABORT | |
1038 | is zero, or return 0 if NOABORT is non-zero. */ | |
1039 | ||
b23b5a5b | 1040 | static int |
b9170155 | 1041 | find_tty (const char **tty_type, const char **tty_name, int noabort) |
a336ee5b | 1042 | { |
b9170155 PE |
1043 | const char *type = egetenv ("TERM"); |
1044 | const char *name = ttyname (fileno (stdout)); | |
a336ee5b CY |
1045 | |
1046 | if (!name) | |
1047 | { | |
1048 | if (noabort) | |
1049 | return 0; | |
1050 | else | |
1051 | { | |
1052 | message (TRUE, "%s: could not get terminal name\n", progname); | |
1053 | fail (); | |
1054 | } | |
1055 | } | |
1056 | ||
1057 | if (!type) | |
1058 | { | |
1059 | if (noabort) | |
1060 | return 0; | |
1061 | else | |
1062 | { | |
1063 | message (TRUE, "%s: please set the TERM variable to your terminal type\n", | |
1064 | progname); | |
1065 | fail (); | |
1066 | } | |
1067 | } | |
1068 | ||
1069 | if (strcmp (type, "eterm") == 0) | |
1070 | { | |
1071 | if (noabort) | |
1072 | return 0; | |
1073 | else | |
1074 | { | |
1075 | /* This causes nasty, MULTI_KBOARD-related input lockouts. */ | |
1076 | message (TRUE, "%s: opening a frame in an Emacs term buffer" | |
1077 | " is not supported\n", progname); | |
1078 | fail (); | |
1079 | } | |
1080 | } | |
1081 | ||
1082 | *tty_name = name; | |
1083 | *tty_type = type; | |
1084 | return 1; | |
1085 | } | |
1086 | ||
b2ff54a0 | 1087 | |
aa0b6932 | 1088 | #if !defined (NO_SOCKETS_IN_FILE_SYSTEM) |
46cec291 | 1089 | |
9f637eea GM |
1090 | /* Three possibilities: |
1091 | 2 - can't be `stat'ed (sets errno) | |
1092 | 1 - isn't owned by us | |
1093 | 0 - success: none of the above */ | |
1094 | ||
1095 | static int | |
fe91f5a0 | 1096 | socket_status (const char *name) |
9f637eea GM |
1097 | { |
1098 | struct stat statbfr; | |
1099 | ||
b0bbc07d | 1100 | if (stat (name, &statbfr) == -1) |
9f637eea GM |
1101 | return 2; |
1102 | ||
1103 | if (statbfr.st_uid != geteuid ()) | |
1104 | return 1; | |
0b0d3e0b | 1105 | |
9f637eea GM |
1106 | return 0; |
1107 | } | |
1108 | ||
974b73e8 | 1109 | \f |
da8e1115 KL |
1110 | /* A signal handler that passes the signal to the Emacs process. |
1111 | Useful for SIGWINCH. */ | |
1112 | ||
9af30bdf | 1113 | static void |
428a555e | 1114 | pass_signal_to_emacs (int signalnum) |
9628b887 KL |
1115 | { |
1116 | int old_errno = errno; | |
1117 | ||
9f729af5 | 1118 | if (emacs_pid) |
428a555e | 1119 | kill (emacs_pid, signalnum); |
9f729af5 | 1120 | |
428a555e | 1121 | signal (signalnum, pass_signal_to_emacs); |
9f729af5 KL |
1122 | errno = old_errno; |
1123 | } | |
1124 | ||
0b0d3e0b KL |
1125 | /* Signal handler for SIGCONT; notify the Emacs process that it can |
1126 | now resume our tty frame. */ | |
1127 | ||
9af30bdf | 1128 | static void |
0b0d3e0b KL |
1129 | handle_sigcont (int signalnum) |
1130 | { | |
1131 | int old_errno = errno; | |
1132 | ||
1133 | if (tcgetpgrp (1) == getpgrp ()) | |
1134 | { | |
1135 | /* We are in the foreground. */ | |
486ba65f | 1136 | send_to_emacs (emacs_socket, "-resume \n"); |
0b0d3e0b KL |
1137 | } |
1138 | else | |
1139 | { | |
1140 | /* We are in the background; cancel the continue. */ | |
a7db35b3 | 1141 | raise (SIGSTOP); |
0b0d3e0b | 1142 | } |
c6c53c3e KL |
1143 | |
1144 | signal (signalnum, handle_sigcont); | |
0b0d3e0b KL |
1145 | errno = old_errno; |
1146 | } | |
1147 | ||
1148 | /* Signal handler for SIGTSTP; notify the Emacs process that we are | |
1149 | going to sleep. Normally the suspend is initiated by Emacs via | |
1150 | server-handle-suspend-tty, but if the server gets out of sync with | |
1151 | reality, we may get a SIGTSTP on C-z. Handling this signal and | |
79432772 | 1152 | notifying Emacs about it should get things under control again. */ |
0b0d3e0b | 1153 | |
9af30bdf | 1154 | static void |
0b0d3e0b KL |
1155 | handle_sigtstp (int signalnum) |
1156 | { | |
1157 | int old_errno = errno; | |
1158 | sigset_t set; | |
c0f342ab | 1159 | |
90843190 | 1160 | if (emacs_socket) |
486ba65f | 1161 | send_to_emacs (emacs_socket, "-suspend \n"); |
0b0d3e0b | 1162 | |
5ab73228 | 1163 | /* Unblock this signal and call the default handler by temporarily |
8350f087 | 1164 | changing the handler and resignaling. */ |
0b0d3e0b KL |
1165 | sigprocmask (SIG_BLOCK, NULL, &set); |
1166 | sigdelset (&set, signalnum); | |
1167 | signal (signalnum, SIG_DFL); | |
a7db35b3 | 1168 | raise (signalnum); |
0b0d3e0b KL |
1169 | sigprocmask (SIG_SETMASK, &set, NULL); /* Let's the above signal through. */ |
1170 | signal (signalnum, handle_sigtstp); | |
1171 | ||
1172 | errno = old_errno; | |
1173 | } | |
273b9028 CY |
1174 | |
1175 | ||
da8e1115 | 1176 | /* Set up signal handlers before opening a frame on the current tty. */ |
0b0d3e0b | 1177 | |
b23b5a5b | 1178 | static void |
4d553a13 | 1179 | init_signals (void) |
9628b887 KL |
1180 | { |
1181 | /* Set up signal handlers. */ | |
428a555e | 1182 | signal (SIGWINCH, pass_signal_to_emacs); |
4ca927b4 KL |
1183 | |
1184 | /* Don't pass SIGINT and SIGQUIT to Emacs, because it has no way of | |
1185 | deciding which terminal the signal came from. C-g is now a | |
1186 | normal input event on secondary terminals. */ | |
1187 | #if 0 | |
428a555e KL |
1188 | signal (SIGINT, pass_signal_to_emacs); |
1189 | signal (SIGQUIT, pass_signal_to_emacs); | |
4ca927b4 | 1190 | #endif |
0b0d3e0b KL |
1191 | |
1192 | signal (SIGCONT, handle_sigcont); | |
1193 | signal (SIGTSTP, handle_sigtstp); | |
1194 | signal (SIGTTOU, handle_sigtstp); | |
9628b887 KL |
1195 | } |
1196 | ||
46cec291 | 1197 | |
b23b5a5b | 1198 | static HSOCKET |
6b0c8984 | 1199 | set_local_socket (const char *local_socket_name) |
46cec291 | 1200 | { |
aa0b6932 | 1201 | HSOCKET s; |
46cec291 | 1202 | struct sockaddr_un server; |
46cec291 | 1203 | |
79432772 | 1204 | /* Open up an AF_UNIX socket in this person's home directory. */ |
46cec291 RS |
1205 | if ((s = socket (AF_UNIX, SOCK_STREAM, 0)) < 0) |
1206 | { | |
42073bfb | 1207 | message (TRUE, "%s: socket: %s\n", progname, strerror (errno)); |
aa0b6932 | 1208 | return INVALID_SOCKET; |
46cec291 | 1209 | } |
e69233c2 | 1210 | |
46cec291 | 1211 | server.sun_family = AF_UNIX; |
c5fee545 | 1212 | |
c5fee545 | 1213 | { |
6b0c8984 AS |
1214 | int sock_status; |
1215 | int use_tmpdir = 0; | |
1216 | int saved_errno; | |
1217 | const char *server_name = local_socket_name; | |
4be3dfc5 | 1218 | const char *tmpdir IF_LINT ( = NULL); |
17107bb6 PE |
1219 | char *tmpdir_storage = NULL; |
1220 | char *socket_name_storage = NULL; | |
0b0d3e0b | 1221 | |
6b0c8984 | 1222 | if (!strchr (local_socket_name, '/') && !strchr (local_socket_name, '\\')) |
8966b757 AS |
1223 | { |
1224 | /* socket_name is a file name component. */ | |
17107bb6 PE |
1225 | long uid = geteuid (); |
1226 | ptrdiff_t tmpdirlen; | |
6b0c8984 | 1227 | use_tmpdir = 1; |
f77b11a0 JB |
1228 | tmpdir = egetenv ("TMPDIR"); |
1229 | if (!tmpdir) | |
b336bfcd GM |
1230 | { |
1231 | #ifdef DARWIN_OS | |
e6068ab3 YM |
1232 | #ifndef _CS_DARWIN_USER_TEMP_DIR |
1233 | #define _CS_DARWIN_USER_TEMP_DIR 65537 | |
1234 | #endif | |
b336bfcd GM |
1235 | size_t n = confstr (_CS_DARWIN_USER_TEMP_DIR, NULL, (size_t) 0); |
1236 | if (n > 0) | |
1237 | { | |
17107bb6 | 1238 | tmpdir = tmpdir_storage = xmalloc (n); |
dd1ff7c0 | 1239 | confstr (_CS_DARWIN_USER_TEMP_DIR, tmpdir_storage, n); |
b336bfcd GM |
1240 | } |
1241 | else | |
1242 | #endif | |
1243 | tmpdir = "/tmp"; | |
1244 | } | |
17107bb6 | 1245 | tmpdirlen = strlen (tmpdir); |
6b0c8984 | 1246 | socket_name_storage = |
17107bb6 | 1247 | xmalloc (tmpdirlen + strlen (server_name) + EXTRA_SPACE); |
6b0c8984 AS |
1248 | strcpy (socket_name_storage, tmpdir); |
1249 | sprintf (socket_name_storage + tmpdirlen, "/emacs%ld/", uid); | |
1250 | strcat (socket_name_storage + tmpdirlen, server_name); | |
1251 | local_socket_name = socket_name_storage; | |
254107e4 RS |
1252 | } |
1253 | ||
6b0c8984 AS |
1254 | if (strlen (local_socket_name) < sizeof (server.sun_path)) |
1255 | strcpy (server.sun_path, local_socket_name); | |
254107e4 | 1256 | else |
819b8f00 | 1257 | { |
78da39c6 | 1258 | message (TRUE, "%s: socket-name %s too long\n", |
6b0c8984 | 1259 | progname, local_socket_name); |
819b8f00 KL |
1260 | fail (); |
1261 | } | |
efb859b4 | 1262 | |
9f637eea GM |
1263 | /* See if the socket exists, and if it's owned by us. */ |
1264 | sock_status = socket_status (server.sun_path); | |
152b6e83 | 1265 | saved_errno = errno; |
6b0c8984 | 1266 | if (sock_status && use_tmpdir) |
efb859b4 | 1267 | { |
9f637eea GM |
1268 | /* Failing that, see if LOGNAME or USER exist and differ from |
1269 | our euid. If so, look for a socket based on the UID | |
1270 | associated with the name. This is reminiscent of the logic | |
1271 | that init_editfns uses to set the global Vuser_full_name. */ | |
e69233c2 | 1272 | |
b9170155 | 1273 | const char *user_name = egetenv ("LOGNAME"); |
293f9f2a | 1274 | |
9f637eea | 1275 | if (!user_name) |
b9170155 | 1276 | user_name = egetenv ("USER"); |
e69233c2 | 1277 | |
9f637eea GM |
1278 | if (user_name) |
1279 | { | |
1280 | struct passwd *pw = getpwnam (user_name); | |
293f9f2a | 1281 | |
9f637eea GM |
1282 | if (pw && (pw->pw_uid != geteuid ())) |
1283 | { | |
1284 | /* We're running under su, apparently. */ | |
17107bb6 PE |
1285 | long uid = pw->pw_uid; |
1286 | ptrdiff_t tmpdirlen = strlen (tmpdir); | |
6b0c8984 AS |
1287 | char *user_socket_name |
1288 | = xmalloc (tmpdirlen + strlen (server_name) + EXTRA_SPACE); | |
1289 | strcpy (user_socket_name, tmpdir); | |
1290 | sprintf (user_socket_name + tmpdirlen, "/emacs%ld/", uid); | |
1291 | strcat (user_socket_name + tmpdirlen, server_name); | |
1292 | ||
1293 | if (strlen (user_socket_name) < sizeof (server.sun_path)) | |
1294 | strcpy (server.sun_path, user_socket_name); | |
5c9659d3 SM |
1295 | else |
1296 | { | |
78da39c6 | 1297 | message (TRUE, "%s: socket-name %s too long\n", |
6b0c8984 | 1298 | progname, user_socket_name); |
65396510 | 1299 | exit (EXIT_FAILURE); |
5c9659d3 | 1300 | } |
6b0c8984 | 1301 | free (user_socket_name); |
5c9659d3 | 1302 | |
9f637eea | 1303 | sock_status = socket_status (server.sun_path); |
b80bf66e | 1304 | saved_errno = errno; |
9f637eea | 1305 | } |
293f9f2a RS |
1306 | else |
1307 | errno = saved_errno; | |
9f637eea | 1308 | } |
efb859b4 | 1309 | } |
e69233c2 | 1310 | |
17107bb6 PE |
1311 | free (socket_name_storage); |
1312 | free (tmpdir_storage); | |
1313 | ||
aa0b6932 JB |
1314 | switch (sock_status) |
1315 | { | |
1316 | case 1: | |
974b73e8 KL |
1317 | /* There's a socket, but it isn't owned by us. This is OK if |
1318 | we are root. */ | |
1319 | if (0 != geteuid ()) | |
1320 | { | |
1321 | message (TRUE, "%s: Invalid socket owner\n", progname); | |
aa0b6932 | 1322 | return INVALID_SOCKET; |
974b73e8 KL |
1323 | } |
1324 | break; | |
aa0b6932 JB |
1325 | |
1326 | case 2: | |
974b73e8 KL |
1327 | /* `stat' failed */ |
1328 | if (saved_errno == ENOENT) | |
1329 | message (TRUE, | |
1330 | "%s: can't find socket; have you started the server?\n\ | |
45adde32 | 1331 | To start the server in Emacs, type \"M-x server-start\".\n", |
aa0b6932 | 1332 | progname); |
974b73e8 KL |
1333 | else |
1334 | message (TRUE, "%s: can't stat %s: %s\n", | |
aa0b6932 | 1335 | progname, server.sun_path, strerror (saved_errno)); |
974b73e8 | 1336 | return INVALID_SOCKET; |
aa0b6932 | 1337 | } |
efb859b4 | 1338 | } |
46cec291 | 1339 | |
4e23f2ba JB |
1340 | if (connect (s, (struct sockaddr *) &server, strlen (server.sun_path) + 2) |
1341 | < 0) | |
46cec291 | 1342 | { |
42073bfb | 1343 | message (TRUE, "%s: connect: %s\n", progname, strerror (errno)); |
aa0b6932 | 1344 | return INVALID_SOCKET; |
46cec291 | 1345 | } |
23a7488d | 1346 | |
aa0b6932 JB |
1347 | return s; |
1348 | } | |
1349 | #endif /* ! NO_SOCKETS_IN_FILE_SYSTEM */ | |
1350 | ||
b23b5a5b | 1351 | static HSOCKET |
636b507b | 1352 | set_socket (int no_exit_if_error) |
aa0b6932 | 1353 | { |
b03d27bd | 1354 | HSOCKET s; |
6b0c8984 | 1355 | const char *local_server_file = server_file; |
c0f342ab | 1356 | |
b03d27bd | 1357 | INITIALIZE (); |
c0f342ab | 1358 | |
aa0b6932 | 1359 | #ifndef NO_SOCKETS_IN_FILE_SYSTEM |
b03d27bd JB |
1360 | /* Explicit --socket-name argument. */ |
1361 | if (socket_name) | |
46cec291 | 1362 | { |
6b0c8984 | 1363 | s = set_local_socket (socket_name); |
636b507b | 1364 | if ((s != INVALID_SOCKET) || no_exit_if_error) |
974b73e8 | 1365 | return s; |
355a326e | 1366 | message (TRUE, "%s: error accessing socket \"%s\"\n", |
974b73e8 | 1367 | progname, socket_name); |
b03d27bd | 1368 | exit (EXIT_FAILURE); |
46cec291 | 1369 | } |
b03d27bd JB |
1370 | #endif |
1371 | ||
1372 | /* Explicit --server-file arg or EMACS_SERVER_FILE variable. */ | |
6b0c8984 AS |
1373 | if (!local_server_file) |
1374 | local_server_file = egetenv ("EMACS_SERVER_FILE"); | |
46cec291 | 1375 | |
6b0c8984 | 1376 | if (local_server_file) |
23a7488d | 1377 | { |
6b0c8984 | 1378 | s = set_tcp_socket (local_server_file); |
636b507b | 1379 | if ((s != INVALID_SOCKET) || no_exit_if_error) |
974b73e8 | 1380 | return s; |
c0f342ab | 1381 | |
78da39c6 | 1382 | message (TRUE, "%s: error accessing server file \"%s\"\n", |
6b0c8984 | 1383 | progname, local_server_file); |
b03d27bd | 1384 | exit (EXIT_FAILURE); |
23a7488d | 1385 | } |
c0f342ab | 1386 | |
b03d27bd JB |
1387 | #ifndef NO_SOCKETS_IN_FILE_SYSTEM |
1388 | /* Implicit local socket. */ | |
6b0c8984 | 1389 | s = set_local_socket ("server"); |
b03d27bd JB |
1390 | if (s != INVALID_SOCKET) |
1391 | return s; | |
1392 | #endif | |
23a7488d | 1393 | |
b03d27bd | 1394 | /* Implicit server file. */ |
6b0c8984 | 1395 | s = set_tcp_socket ("server"); |
636b507b | 1396 | if ((s != INVALID_SOCKET) || no_exit_if_error) |
b03d27bd JB |
1397 | return s; |
1398 | ||
1399 | /* No implicit or explicit socket, and no alternate editor. */ | |
42073bfb | 1400 | message (TRUE, "%s: No socket or alternate editor. Please use:\n\n" |
b03d27bd JB |
1401 | #ifndef NO_SOCKETS_IN_FILE_SYSTEM |
1402 | "\t--socket-name\n" | |
ee6a193c | 1403 | #endif |
b03d27bd JB |
1404 | "\t--server-file (or environment variable EMACS_SERVER_FILE)\n\ |
1405 | \t--alternate-editor (or environment variable ALTERNATE_EDITOR)\n", | |
1406 | progname); | |
1407 | exit (EXIT_FAILURE); | |
aa0b6932 | 1408 | } |
46cec291 | 1409 | |
5e0944c6 | 1410 | #ifdef HAVE_NTGUI |
0e0dced5 JB |
1411 | FARPROC set_fg; /* Pointer to AllowSetForegroundWindow. */ |
1412 | FARPROC get_wc; /* Pointer to RealGetWindowClassA. */ | |
1413 | ||
5e0944c6 DC |
1414 | void |
1415 | w32_set_user_model_id (void) | |
1416 | { | |
1417 | HMODULE shell; | |
1418 | HRESULT (WINAPI * set_user_model) (wchar_t * id); | |
1419 | ||
1420 | /* On Windows 7 and later, we need to set the user model ID | |
1421 | to associate emacsclient launched files with Emacs frames | |
1422 | in the UI. */ | |
1423 | shell = LoadLibrary ("shell32.dll"); | |
1424 | if (shell) | |
1425 | { | |
1426 | set_user_model | |
1427 | = (void *) GetProcAddress (shell, | |
1428 | "SetCurrentProcessExplicitAppUserModelID"); | |
1429 | /* If the function is defined, then we are running on Windows 7 | |
1430 | or newer, and the UI uses this to group related windows | |
1431 | together. Since emacs, runemacs, emacsclient are related, we | |
1432 | want them grouped even though the executables are different, | |
1433 | so we need to set a consistent ID between them. */ | |
1434 | if (set_user_model) | |
1435 | set_user_model (L"GNU.Emacs"); | |
1436 | ||
1437 | FreeLibrary (shell); | |
1438 | } | |
1439 | } | |
1440 | ||
0e0dced5 | 1441 | BOOL CALLBACK |
7c3320d8 | 1442 | w32_find_emacs_process (HWND hWnd, LPARAM lParam) |
0e0dced5 JB |
1443 | { |
1444 | DWORD pid; | |
1445 | char class[6]; | |
1446 | ||
1447 | /* Reject any window not of class "Emacs". */ | |
1448 | if (! get_wc (hWnd, class, sizeof (class)) | |
1449 | || strcmp (class, "Emacs")) | |
1450 | return TRUE; | |
1451 | ||
1452 | /* We only need the process id, not the thread id. */ | |
1453 | (void) GetWindowThreadProcessId (hWnd, &pid); | |
1454 | ||
1455 | /* Not the one we're looking for. */ | |
1456 | if (pid != (DWORD) emacs_pid) return TRUE; | |
1457 | ||
1458 | /* OK, let's raise it. */ | |
1459 | set_fg (emacs_pid); | |
1460 | ||
1461 | /* Stop enumeration. */ | |
1462 | return FALSE; | |
1463 | } | |
1464 | ||
79432772 JB |
1465 | /* Search for a window of class "Emacs" and owned by a process with |
1466 | process id = emacs_pid. If found, allow it to grab the focus. */ | |
1467 | ||
0e0dced5 | 1468 | void |
7c3320d8 | 1469 | w32_give_focus (void) |
0e0dced5 | 1470 | { |
ff90fbde | 1471 | HANDLE user32; |
0e0dced5 | 1472 | |
71b8f735 | 1473 | /* It shouldn't happen when dealing with TCP sockets. */ |
0e0dced5 JB |
1474 | if (!emacs_pid) return; |
1475 | ||
ff90fbde JR |
1476 | user32 = GetModuleHandle ("user32.dll"); |
1477 | ||
1478 | if (!user32) | |
1479 | return; | |
0e0dced5 JB |
1480 | |
1481 | /* Modern Windows restrict which processes can set the foreground window. | |
1482 | emacsclient can allow Emacs to grab the focus by calling the function | |
1483 | AllowSetForegroundWindow. Unfortunately, older Windows (W95, W98 and | |
1484 | NT) lack this function, so we have to check its availability. */ | |
ff90fbde JR |
1485 | if ((set_fg = GetProcAddress (user32, "AllowSetForegroundWindow")) |
1486 | && (get_wc = GetProcAddress (user32, "RealGetWindowClassA"))) | |
0e0dced5 | 1487 | EnumWindows (w32_find_emacs_process, (LPARAM) 0); |
0e0dced5 | 1488 | } |
5e0944c6 | 1489 | #endif /* HAVE_NTGUI */ |
0e0dced5 | 1490 | |
636b507b DN |
1491 | /* Start the emacs daemon and try to connect to it. */ |
1492 | ||
b23b5a5b | 1493 | static void |
636b507b DN |
1494 | start_daemon_and_retry_set_socket (void) |
1495 | { | |
802bdb3c | 1496 | #ifndef WINDOWSNT |
636b507b DN |
1497 | pid_t dpid; |
1498 | int status; | |
636b507b DN |
1499 | |
1500 | dpid = fork (); | |
1501 | ||
1502 | if (dpid > 0) | |
1503 | { | |
fd95644b DN |
1504 | pid_t w; |
1505 | w = waitpid (dpid, &status, WUNTRACED | WCONTINUED); | |
636b507b | 1506 | |
361358ea | 1507 | if ((w == -1) || !WIFEXITED (status) || WEXITSTATUS (status)) |
fd95644b DN |
1508 | { |
1509 | message (TRUE, "Error: Could not start the Emacs daemon\n"); | |
1510 | exit (EXIT_FAILURE); | |
1511 | } | |
1512 | ||
1513 | /* Try connecting, the daemon should have started by now. */ | |
1514 | message (TRUE, "Emacs daemon should have started, trying to connect again\n"); | |
636b507b | 1515 | if ((emacs_socket = set_socket (1)) == INVALID_SOCKET) |
fd95644b DN |
1516 | { |
1517 | message (TRUE, "Error: Cannot connect even after starting the Emacs daemon\n"); | |
1518 | exit (EXIT_FAILURE); | |
1519 | } | |
636b507b DN |
1520 | } |
1521 | else if (dpid < 0) | |
1522 | { | |
fd95644b | 1523 | fprintf (stderr, "Error: Cannot fork!\n"); |
6ab88e02 | 1524 | exit (EXIT_FAILURE); |
636b507b DN |
1525 | } |
1526 | else | |
1527 | { | |
988e88ab | 1528 | char emacs[] = "emacs"; |
b0bbc07d PE |
1529 | char daemon_option[] = "--daemon"; |
1530 | char *d_argv[] = {emacs, daemon_option, 0 }; | |
636b507b DN |
1531 | if (socket_name != NULL) |
1532 | { | |
1533 | /* Pass --daemon=socket_name as argument. */ | |
988e88ab | 1534 | const char *deq = "--daemon="; |
17107bb6 PE |
1535 | char *daemon_arg = xmalloc (strlen (deq) |
1536 | + strlen (socket_name) + 1); | |
636b507b DN |
1537 | strcpy (daemon_arg, deq); |
1538 | strcat (daemon_arg, socket_name); | |
1539 | d_argv[1] = daemon_arg; | |
1540 | } | |
1541 | execvp ("emacs", d_argv); | |
1542 | message (TRUE, "%s: error starting emacs daemon\n", progname); | |
1543 | } | |
802bdb3c | 1544 | #endif /* WINDOWSNT */ |
636b507b DN |
1545 | } |
1546 | ||
aa0b6932 | 1547 | int |
873fbd0b | 1548 | main (int argc, char **argv) |
aa0b6932 | 1549 | { |
c5443aa5 | 1550 | int rl = 0, needlf = 0; |
974b73e8 | 1551 | char *cwd, *str; |
aa0b6932 | 1552 | char string[BUFSIZ+1]; |
4be3dfc5 | 1553 | int start_daemon_if_needed; |
3ecb8d93 | 1554 | int exit_status = EXIT_SUCCESS; |
aa0b6932 | 1555 | |
974b73e8 | 1556 | main_argv = argv; |
aa0b6932 JB |
1557 | progname = argv[0]; |
1558 | ||
5e0944c6 | 1559 | #ifdef HAVE_NTGUI |
6b59694e DC |
1560 | /* On Windows 7 and later, we need to explicitly associate |
1561 | emacsclient with emacs so the UI behaves sensibly. This | |
1562 | association does no harm if we're not actually connecting to an | |
1563 | Emacs using a window display. */ | |
ff90fbde | 1564 | w32_set_user_model_id (); |
5e0944c6 | 1565 | #endif /* HAVE_NTGUI */ |
ff90fbde | 1566 | |
aa0b6932 JB |
1567 | /* Process options. */ |
1568 | decode_options (argc, argv); | |
1569 | ||
273b9028 | 1570 | if ((argc - optind < 1) && !eval && current_frame) |
23a7488d | 1571 | { |
974b73e8 KL |
1572 | message (TRUE, "%s: file name or argument required\n" |
1573 | "Try `%s --help' for more information\n", | |
1574 | progname, progname); | |
aa0b6932 | 1575 | exit (EXIT_FAILURE); |
23a7488d RS |
1576 | } |
1577 | ||
636b507b DN |
1578 | /* If alternate_editor is the empty string, start the emacs daemon |
1579 | in case of failure to connect. */ | |
1580 | start_daemon_if_needed = (alternate_editor | |
1581 | && (alternate_editor[0] == '\0')); | |
aa0b6932 | 1582 | |
7e6bb4c9 PE |
1583 | emacs_socket = set_socket (alternate_editor || start_daemon_if_needed); |
1584 | if (emacs_socket == INVALID_SOCKET) | |
1585 | { | |
1586 | if (! start_daemon_if_needed) | |
1587 | fail (); | |
1588 | ||
7e6bb4c9 PE |
1589 | start_daemon_and_retry_set_socket (); |
1590 | } | |
974b73e8 KL |
1591 | |
1592 | cwd = get_current_dir_name (); | |
46cec291 RS |
1593 | if (cwd == 0) |
1594 | { | |
1595 | /* getwd puts message in STRING if it fails. */ | |
974b73e8 KL |
1596 | message (TRUE, "%s: %s\n", progname, |
1597 | "Cannot get current working directory"); | |
819b8f00 | 1598 | fail (); |
46cec291 RS |
1599 | } |
1600 | ||
5e0944c6 | 1601 | #ifdef HAVE_NTGUI |
efc3dd3c | 1602 | if (display && !strcmp (display, "w32")) |
0e0dced5 | 1603 | w32_give_focus (); |
5e0944c6 | 1604 | #endif /* HAVE_NTGUI */ |
c66648e0 | 1605 | |
273b9028 | 1606 | /* Send over our environment and current directory. */ |
59e085e0 KL |
1607 | if (!current_frame) |
1608 | { | |
59e085e0 KL |
1609 | int i; |
1610 | for (i = 0; environ[i]; i++) | |
1611 | { | |
486ba65f JR |
1612 | send_to_emacs (emacs_socket, "-env "); |
1613 | quote_argument (emacs_socket, environ[i]); | |
1614 | send_to_emacs (emacs_socket, " "); | |
59e085e0 | 1615 | } |
2828d5f9 | 1616 | } |
ba528748 SM |
1617 | send_to_emacs (emacs_socket, "-dir "); |
1618 | quote_argument (emacs_socket, cwd); | |
1619 | send_to_emacs (emacs_socket, "/"); | |
1620 | send_to_emacs (emacs_socket, " "); | |
2828d5f9 | 1621 | |
6afdd335 | 1622 | retry: |
5212210c | 1623 | if (nowait) |
486ba65f | 1624 | send_to_emacs (emacs_socket, "-nowait "); |
292d74a3 | 1625 | |
92071250 | 1626 | if (current_frame) |
486ba65f | 1627 | send_to_emacs (emacs_socket, "-current-frame "); |
c0f342ab | 1628 | |
30be2360 | 1629 | if (display) |
87209357 | 1630 | { |
486ba65f JR |
1631 | send_to_emacs (emacs_socket, "-display "); |
1632 | quote_argument (emacs_socket, display); | |
1633 | send_to_emacs (emacs_socket, " "); | |
87209357 | 1634 | } |
30be2360 | 1635 | |
0191e222 CY |
1636 | if (parent_id) |
1637 | { | |
1638 | send_to_emacs (emacs_socket, "-parent-id "); | |
1639 | quote_argument (emacs_socket, parent_id); | |
1640 | send_to_emacs (emacs_socket, " "); | |
1641 | } | |
1642 | ||
18a4ce5e AR |
1643 | if (frame_parameters && !current_frame) |
1644 | { | |
1645 | send_to_emacs (emacs_socket, "-frame-parameters "); | |
1646 | quote_argument (emacs_socket, frame_parameters); | |
1647 | send_to_emacs (emacs_socket, " "); | |
1648 | } | |
1649 | ||
2d0e8e61 CY |
1650 | /* Unless we are certain we don't want to occupy the tty, send our |
1651 | tty information to Emacs. For example, in daemon mode Emacs may | |
1652 | need to occupy this tty if no other frame is available. */ | |
1653 | if (!current_frame || !eval) | |
9628b887 | 1654 | { |
b9170155 | 1655 | const char *tty_type, *tty_name; |
0b0d3e0b | 1656 | |
273b9028 CY |
1657 | if (find_tty (&tty_type, &tty_name, !tty)) |
1658 | { | |
b2ff54a0 | 1659 | #if !defined (NO_SOCKETS_IN_FILE_SYSTEM) |
273b9028 | 1660 | init_signals (); |
b2ff54a0 | 1661 | #endif |
273b9028 CY |
1662 | send_to_emacs (emacs_socket, "-tty "); |
1663 | quote_argument (emacs_socket, tty_name); | |
1664 | send_to_emacs (emacs_socket, " "); | |
1665 | quote_argument (emacs_socket, tty_type); | |
1666 | send_to_emacs (emacs_socket, " "); | |
1667 | } | |
9628b887 | 1668 | } |
77134727 | 1669 | |
273b9028 | 1670 | if (!current_frame && !tty) |
486ba65f | 1671 | send_to_emacs (emacs_socket, "-window-system "); |
0b0d3e0b | 1672 | |
87209357 | 1673 | if ((argc - optind > 0)) |
5212210c | 1674 | { |
b0bbc07d | 1675 | int i; |
87209357 | 1676 | for (i = optind; i < argc; i++) |
46cec291 | 1677 | { |
0b0d3e0b | 1678 | |
87209357 | 1679 | if (eval) |
0b0d3e0b | 1680 | { |
974b73e8 | 1681 | /* Don't prepend cwd or anything like that. */ |
486ba65f JR |
1682 | send_to_emacs (emacs_socket, "-eval "); |
1683 | quote_argument (emacs_socket, argv[i]); | |
1684 | send_to_emacs (emacs_socket, " "); | |
0b0d3e0b KL |
1685 | continue; |
1686 | } | |
1687 | ||
1688 | if (*argv[i] == '+') | |
1689 | { | |
87209357 EZ |
1690 | char *p = argv[i] + 1; |
1691 | while (isdigit ((unsigned char) *p) || *p == ':') p++; | |
0b0d3e0b KL |
1692 | if (*p == 0) |
1693 | { | |
486ba65f JR |
1694 | send_to_emacs (emacs_socket, "-position "); |
1695 | quote_argument (emacs_socket, argv[i]); | |
1696 | send_to_emacs (emacs_socket, " "); | |
0b0d3e0b KL |
1697 | continue; |
1698 | } | |
0b0d3e0b | 1699 | } |
6cde1b21 JB |
1700 | #ifdef WINDOWSNT |
1701 | else if (! file_name_absolute_p (argv[i]) | |
1702 | && (isalpha (argv[i][0]) && argv[i][1] == ':')) | |
1703 | /* Windows can have a different default directory for each | |
1704 | drive, so the cwd passed via "-dir" is not sufficient | |
1705 | to account for that. | |
1706 | If the user uses <drive>:<relpath>, we hence need to be | |
1707 | careful to expand <relpath> with the default directory | |
1708 | corresponding to <drive>. */ | |
1709 | { | |
1710 | char *filename = (char *) xmalloc (MAX_PATH); | |
1711 | DWORD size; | |
1712 | ||
1713 | size = GetFullPathName (argv[i], MAX_PATH, filename, NULL); | |
1714 | if (size > 0 && size < MAX_PATH) | |
1715 | argv[i] = filename; | |
1716 | else | |
1717 | free (filename); | |
1718 | } | |
1719 | #endif | |
0b0d3e0b | 1720 | |
486ba65f | 1721 | send_to_emacs (emacs_socket, "-file "); |
486ba65f JR |
1722 | quote_argument (emacs_socket, argv[i]); |
1723 | send_to_emacs (emacs_socket, " "); | |
0b0d3e0b | 1724 | } |
46cec291 | 1725 | } |
273b9028 | 1726 | else if (eval) |
87209357 | 1727 | { |
273b9028 CY |
1728 | /* Read expressions interactively. */ |
1729 | while ((str = fgets (string, BUFSIZ, stdin))) | |
1730 | { | |
1731 | send_to_emacs (emacs_socket, "-eval "); | |
1732 | quote_argument (emacs_socket, str); | |
1733 | } | |
1734 | send_to_emacs (emacs_socket, " "); | |
87209357 | 1735 | } |
0b0d3e0b | 1736 | |
486ba65f | 1737 | send_to_emacs (emacs_socket, "\n"); |
46cec291 | 1738 | |
fc2040c0 | 1739 | /* Wait for an answer. */ |
0b973fc5 | 1740 | if (!eval && !tty && !nowait && !quiet) |
30be2360 SM |
1741 | { |
1742 | printf ("Waiting for Emacs..."); | |
1743 | needlf = 2; | |
1744 | } | |
46cec291 | 1745 | fflush (stdout); |
0b0d3e0b | 1746 | fsync (1); |
46cec291 | 1747 | |
3cf8c6aa | 1748 | /* Now, wait for an answer and print any messages. */ |
b166dcd8 | 1749 | while (exit_status == EXIT_SUCCESS) |
3cf8c6aa | 1750 | { |
2b84f674 | 1751 | char *p, *end_p; |
b166dcd8 KC |
1752 | do |
1753 | { | |
1754 | errno = 0; | |
1755 | rl = recv (emacs_socket, string, BUFSIZ, 0); | |
1756 | } | |
1757 | /* If we receive a signal (e.g. SIGWINCH, which we pass | |
1758 | through to Emacs), on some OSes we get EINTR and must retry. */ | |
1759 | while (rl < 0 && errno == EINTR); | |
1760 | ||
1761 | if (rl <= 0) | |
1762 | break; | |
b23b5a5b | 1763 | |
974b73e8 KL |
1764 | string[rl] = '\0'; |
1765 | ||
2b84f674 AS |
1766 | /* Loop over all NL-terminated messages. */ |
1767 | for (end_p = p = string; end_p != NULL && *end_p != '\0'; p = end_p) | |
1768 | { | |
1769 | end_p = strchr (p, '\n'); | |
1770 | if (end_p != NULL) | |
1771 | *end_p++ = '\0'; | |
0b0d3e0b | 1772 | |
6b59694e DC |
1773 | if (strprefix ("-emacs-pid ", p)) |
1774 | { | |
1775 | /* -emacs-pid PID: The process id of the Emacs process. */ | |
1776 | emacs_pid = strtol (p + strlen ("-emacs-pid"), NULL, 10); | |
1777 | } | |
1778 | else if (strprefix ("-window-system-unsupported ", p)) | |
1779 | { | |
1780 | /* -window-system-unsupported: Emacs was compiled without support | |
1781 | for whatever window system we tried. Try the alternate | |
1782 | display, or, failing that, try the terminal. */ | |
1783 | if (alt_display) | |
1784 | { | |
1785 | display = alt_display; | |
1786 | alt_display = NULL; | |
1787 | } | |
1788 | else | |
1789 | { | |
1790 | nowait = 0; | |
1791 | tty = 1; | |
1792 | } | |
1793 | ||
1794 | goto retry; | |
1795 | } | |
1796 | else if (strprefix ("-print ", p)) | |
1797 | { | |
1798 | /* -print STRING: Print STRING on the terminal. */ | |
1799 | str = unquote_argument (p + strlen ("-print ")); | |
1800 | if (needlf) | |
1801 | printf ("\n"); | |
1802 | printf ("%s", str); | |
1803 | needlf = str[0] == '\0' ? needlf : str[strlen (str) - 1] != '\n'; | |
1804 | } | |
1805 | else if (strprefix ("-print-nonl ", p)) | |
1806 | { | |
1807 | /* -print-nonl STRING: Print STRING on the terminal. | |
1808 | Used to continue a preceding -print command. */ | |
1809 | str = unquote_argument (p + strlen ("-print-nonl ")); | |
1810 | printf ("%s", str); | |
1811 | needlf = str[0] == '\0' ? needlf : str[strlen (str) - 1] != '\n'; | |
1812 | } | |
1813 | else if (strprefix ("-error ", p)) | |
1814 | { | |
1815 | /* -error DESCRIPTION: Signal an error on the terminal. */ | |
1816 | str = unquote_argument (p + strlen ("-error ")); | |
1817 | if (needlf) | |
1818 | printf ("\n"); | |
1819 | fprintf (stderr, "*ERROR*: %s", str); | |
1820 | needlf = str[0] == '\0' ? needlf : str[strlen (str) - 1] != '\n'; | |
1821 | exit_status = EXIT_FAILURE; | |
1822 | } | |
c801ad51 | 1823 | #ifdef SIGSTOP |
2b84f674 AS |
1824 | else if (strprefix ("-suspend ", p)) |
1825 | { | |
1826 | /* -suspend: Suspend this terminal, i.e., stop the process. */ | |
1827 | if (needlf) | |
1828 | printf ("\n"); | |
1829 | needlf = 0; | |
1830 | kill (0, SIGSTOP); | |
1831 | } | |
b2ff54a0 | 1832 | #endif |
2b84f674 AS |
1833 | else |
1834 | { | |
1835 | /* Unknown command. */ | |
1836 | if (needlf) | |
1837 | printf ("\n"); | |
1838 | needlf = 0; | |
1839 | printf ("*ERROR*: Unknown message: %s\n", p); | |
1840 | } | |
1841 | } | |
3cf8c6aa SM |
1842 | } |
1843 | ||
1844 | if (needlf) | |
1845 | printf ("\n"); | |
1846 | fflush (stdout); | |
0b0d3e0b | 1847 | fsync (1); |
23a7488d | 1848 | |
3ecb8d93 WS |
1849 | if (rl < 0) |
1850 | exit_status = EXIT_FAILURE; | |
1851 | ||
4b7b77f6 | 1852 | CLOSE_SOCKET (emacs_socket); |
3ecb8d93 | 1853 | return exit_status; |
46cec291 RS |
1854 | } |
1855 | ||
1e7823d0 | 1856 | #endif /* HAVE_SOCKETS && HAVE_INET_SOCKETS */ |