Commit | Line | Data |
---|---|---|
efb859b4 | 1 | /* Client process that communicates with GNU Emacs acting as server. |
9374581a | 2 | |
ab422c4d | 3 | Copyright (C) 1986-1987, 1994, 1999-2013 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 |
9239d970 | 91 | char *getenv (const char *); |
8f9aaa0a | 92 | |
8f9aaa0a RS |
93 | #ifndef VERSION |
94 | #define VERSION "unspecified" | |
95 | #endif | |
96 | \f | |
aa0b6932 JB |
97 | |
98 | #ifndef EXIT_SUCCESS | |
99 | #define EXIT_SUCCESS 0 | |
100 | #endif | |
101 | ||
102 | #ifndef EXIT_FAILURE | |
103 | #define EXIT_FAILURE 1 | |
104 | #endif | |
105 | ||
106 | #ifndef FALSE | |
107 | #define FALSE 0 | |
108 | #endif | |
109 | ||
110 | #ifndef TRUE | |
111 | #define TRUE 1 | |
112 | #endif | |
113 | ||
bc558f3e JB |
114 | /* Additional space when allocating buffers for filenames, etc. */ |
115 | #define EXTRA_SPACE 100 | |
116 | ||
069a7756 JB |
117 | #ifdef min |
118 | #undef min | |
119 | #endif | |
1e6f32f8 JM |
120 | #define min(x, y) (((x) < (y)) ? (x) : (y)) |
121 | ||
aa0b6932 | 122 | \f |
8f9aaa0a | 123 | /* Name used to invoke this program. */ |
728a982d | 124 | const char *progname; |
8f9aaa0a | 125 | |
0a125897 KL |
126 | /* The second argument to main. */ |
127 | char **main_argv; | |
128 | ||
749ae770 | 129 | /* Nonzero means don't wait for a response from Emacs. --no-wait. */ |
8f9aaa0a RS |
130 | int nowait = 0; |
131 | ||
0b973fc5 DW |
132 | /* Nonzero means don't print messages for successful operations. --quiet. */ |
133 | int quiet = 0; | |
134 | ||
30be2360 SM |
135 | /* Nonzero means args are expressions to be evaluated. --eval. */ |
136 | int eval = 0; | |
137 | ||
31fa6595 SM |
138 | /* Nonzero means don't open a new frame. Inverse of --create-frame. */ |
139 | int current_frame = 1; | |
92071250 | 140 | |
30be2360 | 141 | /* The display on which Emacs should work. --display. */ |
988e88ab | 142 | const char *display = NULL; |
30be2360 | 143 | |
6b59694e DC |
144 | /* The alternate display we should try if Emacs does not support display. */ |
145 | const char *alt_display = NULL; | |
146 | ||
0191e222 CY |
147 | /* The parent window ID, if we are opening a frame via XEmbed. */ |
148 | char *parent_id = NULL; | |
149 | ||
9628b887 | 150 | /* Nonzero means open a new Emacs frame on the current terminal. */ |
77134727 | 151 | int tty = 0; |
9628b887 | 152 | |
30be2360 SM |
153 | /* If non-NULL, the name of an editor to fallback to if the server |
154 | is not running. --alternate-editor. */ | |
b03d27bd | 155 | const char *alternate_editor = NULL; |
30be2360 | 156 | |
3db926be | 157 | /* If non-NULL, the filename of the UNIX socket. */ |
6b0c8984 | 158 | const char *socket_name = NULL; |
254107e4 | 159 | |
aa0b6932 | 160 | /* If non-NULL, the filename of the authentication file. */ |
988e88ab | 161 | const char *server_file = NULL; |
aa0b6932 | 162 | |
c66648e0 JB |
163 | /* PID of the Emacs server process. */ |
164 | int emacs_pid = 0; | |
165 | ||
18a4ce5e AR |
166 | /* If non-NULL, a string that should form a frame parameter alist to |
167 | be used for the new frame */ | |
168 | const char *frame_parameters = NULL; | |
169 | ||
845ca893 | 170 | static _Noreturn void print_help_and_exit (void); |
68441b90 | 171 | |
7f3bff3e | 172 | |
8f9aaa0a RS |
173 | struct option longopts[] = |
174 | { | |
749ae770 | 175 | { "no-wait", no_argument, NULL, 'n' }, |
0b973fc5 | 176 | { "quiet", no_argument, NULL, 'q' }, |
30be2360 | 177 | { "eval", no_argument, NULL, 'e' }, |
8f9aaa0a RS |
178 | { "help", no_argument, NULL, 'H' }, |
179 | { "version", no_argument, NULL, 'V' }, | |
b28c910d | 180 | { "tty", no_argument, NULL, 't' }, |
dc1cd5f7 | 181 | { "nw", no_argument, NULL, 't' }, |
31fa6595 | 182 | { "create-frame", no_argument, NULL, 'c' }, |
3cf8c6aa | 183 | { "alternate-editor", required_argument, NULL, 'a' }, |
18a4ce5e | 184 | { "frame-parameters", required_argument, NULL, 'F' }, |
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 | 189 | { "display", required_argument, NULL, 'd' }, |
0191e222 | 190 | { "parent-id", required_argument, NULL, 'p' }, |
30be2360 | 191 | { 0, 0, 0, 0 } |
8f9aaa0a RS |
192 | }; |
193 | ||
974b73e8 KL |
194 | \f |
195 | /* Like malloc but get fatal error if memory is exhausted. */ | |
196 | ||
17107bb6 PE |
197 | static void * |
198 | xmalloc (size_t size) | |
974b73e8 | 199 | { |
17107bb6 | 200 | void *result = malloc (size); |
974b73e8 KL |
201 | if (result == NULL) |
202 | { | |
203 | perror ("malloc"); | |
204 | exit (EXIT_FAILURE); | |
205 | } | |
206 | return result; | |
207 | } | |
208 | ||
974b73e8 KL |
209 | /* From sysdep.c */ |
210 | #if !defined (HAVE_GET_CURRENT_DIR_NAME) || defined (BROKEN_GET_CURRENT_DIR_NAME) | |
211 | ||
c5443aa5 | 212 | char *get_current_dir_name (void); |
cb06b8dc | 213 | |
974b73e8 | 214 | /* Return the current working directory. Returns NULL on errors. |
5ab73228 | 215 | Any other returned value must be freed with free. This is used |
974b73e8 KL |
216 | only when get_current_dir_name is not defined on the system. */ |
217 | char* | |
7c3320d8 | 218 | get_current_dir_name (void) |
974b73e8 KL |
219 | { |
220 | char *buf; | |
b9170155 | 221 | const char *pwd; |
974b73e8 | 222 | struct stat dotstat, pwdstat; |
9239d970 | 223 | /* If PWD is accurate, use it instead of calling getcwd. PWD is |
974b73e8 KL |
224 | sometimes a nicer name, and using it may avoid a fatal error if a |
225 | parent directory is searchable but not readable. */ | |
7ce8671d | 226 | if ((pwd = egetenv ("PWD")) != 0 |
974b73e8 KL |
227 | && (IS_DIRECTORY_SEP (*pwd) || (*pwd && IS_DEVICE_SEP (pwd[1]))) |
228 | && stat (pwd, &pwdstat) == 0 | |
229 | && stat (".", &dotstat) == 0 | |
230 | && dotstat.st_ino == pwdstat.st_ino | |
231 | && dotstat.st_dev == pwdstat.st_dev | |
232 | #ifdef MAXPATHLEN | |
233 | && strlen (pwd) < MAXPATHLEN | |
234 | #endif | |
235 | ) | |
236 | { | |
237 | buf = (char *) xmalloc (strlen (pwd) + 1); | |
974b73e8 KL |
238 | strcpy (buf, pwd); |
239 | } | |
974b73e8 KL |
240 | else |
241 | { | |
242 | size_t buf_size = 1024; | |
974b73e8 KL |
243 | for (;;) |
244 | { | |
17107bb6 PE |
245 | int tmp_errno; |
246 | buf = malloc (buf_size); | |
247 | if (! buf) | |
248 | break; | |
974b73e8 KL |
249 | if (getcwd (buf, buf_size) == buf) |
250 | break; | |
17107bb6 PE |
251 | tmp_errno = errno; |
252 | free (buf); | |
253 | if (tmp_errno != ERANGE) | |
974b73e8 | 254 | { |
974b73e8 KL |
255 | errno = tmp_errno; |
256 | return NULL; | |
257 | } | |
258 | buf_size *= 2; | |
17107bb6 PE |
259 | if (! buf_size) |
260 | { | |
261 | errno = ENOMEM; | |
262 | return NULL; | |
263 | } | |
974b73e8 KL |
264 | } |
265 | } | |
974b73e8 KL |
266 | return buf; |
267 | } | |
268 | #endif | |
269 | ||
42073bfb | 270 | #ifdef WINDOWSNT |
7ce8671d | 271 | |
a54af40e EZ |
272 | /* Like strdup but get a fatal error if memory is exhausted. */ |
273 | ||
274 | char * | |
275 | xstrdup (const char *s) | |
276 | { | |
277 | char *result = strdup (s); | |
278 | if (result == NULL) | |
279 | { | |
280 | perror ("strdup"); | |
281 | exit (EXIT_FAILURE); | |
282 | } | |
283 | return result; | |
284 | } | |
285 | ||
7ce8671d JB |
286 | #define REG_ROOT "SOFTWARE\\GNU\\Emacs" |
287 | ||
288 | /* Retrieve an environment variable from the Emacs subkeys of the registry. | |
289 | Return NULL if the variable was not found, or it was empty. | |
290 | This code is based on w32_get_resource (w32.c). */ | |
291 | char * | |
7c3320d8 | 292 | w32_get_resource (HKEY predefined, char *key, LPDWORD type) |
7ce8671d JB |
293 | { |
294 | HKEY hrootkey = NULL; | |
295 | char *result = NULL; | |
296 | DWORD cbData; | |
297 | ||
298 | if (RegOpenKeyEx (predefined, REG_ROOT, 0, KEY_READ, &hrootkey) == ERROR_SUCCESS) | |
299 | { | |
300 | if (RegQueryValueEx (hrootkey, key, NULL, NULL, NULL, &cbData) == ERROR_SUCCESS) | |
301 | { | |
302 | result = (char *) xmalloc (cbData); | |
303 | ||
bc558f3e JB |
304 | if ((RegQueryValueEx (hrootkey, key, NULL, type, result, &cbData) != ERROR_SUCCESS) |
305 | || (*result == 0)) | |
7ce8671d JB |
306 | { |
307 | free (result); | |
308 | result = NULL; | |
309 | } | |
310 | } | |
311 | ||
312 | RegCloseKey (hrootkey); | |
313 | } | |
314 | ||
315 | return result; | |
316 | } | |
317 | ||
318 | /* | |
319 | getenv wrapper for Windows | |
320 | ||
a54af40e EZ |
321 | Value is allocated on the heap, and can be free'd. |
322 | ||
323 | This is needed to duplicate Emacs's behavior, which is to look for | |
324 | environment variables in the registry if they don't appear in the | |
325 | environment. */ | |
7ce8671d | 326 | char * |
7c3320d8 | 327 | w32_getenv (char *envvar) |
7ce8671d JB |
328 | { |
329 | char *value; | |
330 | DWORD dwType; | |
331 | ||
657d08d3 | 332 | if ((value = getenv (envvar))) |
a54af40e EZ |
333 | /* Found in the environment. strdup it, because values returned |
334 | by getenv cannot be free'd. */ | |
335 | return xstrdup (value); | |
7ce8671d JB |
336 | |
337 | if (! (value = w32_get_resource (HKEY_CURRENT_USER, envvar, &dwType)) && | |
338 | ! (value = w32_get_resource (HKEY_LOCAL_MACHINE, envvar, &dwType))) | |
d41784ee EZ |
339 | { |
340 | /* "w32console" is what Emacs on Windows uses for tty-type under -nw. */ | |
341 | if (strcmp (envvar, "TERM") == 0) | |
a54af40e | 342 | return xstrdup ("w32console"); |
d41784ee EZ |
343 | /* Found neither in the environment nor in the registry. */ |
344 | return NULL; | |
345 | } | |
7ce8671d JB |
346 | |
347 | if (dwType == REG_SZ) | |
348 | /* Registry; no need to expand. */ | |
349 | return value; | |
350 | ||
351 | if (dwType == REG_EXPAND_SZ) | |
352 | { | |
353 | DWORD size; | |
354 | ||
657d08d3 | 355 | if ((size = ExpandEnvironmentStrings (value, NULL, 0))) |
7ce8671d JB |
356 | { |
357 | char *buffer = (char *) xmalloc (size); | |
358 | if (ExpandEnvironmentStrings (value, buffer, size)) | |
359 | { | |
360 | /* Found and expanded. */ | |
361 | free (value); | |
362 | return buffer; | |
363 | } | |
364 | ||
365 | /* Error expanding. */ | |
366 | free (buffer); | |
367 | } | |
368 | } | |
369 | ||
370 | /* Not the right type, or not correctly expanded. */ | |
371 | free (value); | |
372 | return NULL; | |
373 | } | |
374 | ||
ff90fbde | 375 | |
42073bfb | 376 | int |
7c3320d8 | 377 | w32_window_app (void) |
42073bfb JB |
378 | { |
379 | static int window_app = -1; | |
380 | char szTitle[MAX_PATH]; | |
381 | ||
382 | if (window_app < 0) | |
dbf60b07 JR |
383 | { |
384 | /* Checking for STDOUT does not work; it's a valid handle also in | |
385 | nonconsole apps. Testing for the console title seems to work. */ | |
386 | window_app = (GetConsoleTitleA (szTitle, MAX_PATH) == 0); | |
387 | if (window_app) | |
361358ea | 388 | InitCommonControls (); |
dbf60b07 | 389 | } |
42073bfb JB |
390 | |
391 | return window_app; | |
392 | } | |
105faa84 | 393 | |
79432772 | 394 | /* execvp wrapper for Windows. Quotes arguments with embedded spaces. |
105faa84 DN |
395 | |
396 | This is necessary due to the broken implementation of exec* routines in | |
397 | the Microsoft libraries: they concatenate the arguments together without | |
398 | quoting special characters, and pass the result to CreateProcess, with | |
7c3320d8 | 399 | predictably bad results. By contrast, POSIX execvp passes the arguments |
79432772 JB |
400 | directly into the argv array of the child process. */ |
401 | ||
105faa84 | 402 | int |
7c3320d8 | 403 | w32_execvp (const char *path, char **argv) |
105faa84 DN |
404 | { |
405 | int i; | |
ad0a19b7 | 406 | extern int execvp (const char*, char **); |
105faa84 DN |
407 | |
408 | /* Required to allow a .BAT script as alternate editor. */ | |
409 | argv[0] = (char *) alternate_editor; | |
410 | ||
411 | for (i = 0; argv[i]; i++) | |
412 | if (strchr (argv[i], ' ')) | |
413 | { | |
414 | char *quoted = alloca (strlen (argv[i]) + 3); | |
415 | sprintf (quoted, "\"%s\"", argv[i]); | |
416 | argv[i] = quoted; | |
417 | } | |
418 | ||
419 | return execvp (path, argv); | |
420 | } | |
421 | ||
422 | #undef execvp | |
423 | #define execvp w32_execvp | |
424 | ||
d41784ee EZ |
425 | /* Emulation of ttyname for Windows. */ |
426 | char * | |
427 | ttyname (int fd) | |
428 | { | |
429 | return "CONOUT$"; | |
430 | } | |
431 | ||
105faa84 | 432 | #endif /* WINDOWSNT */ |
42073bfb | 433 | |
f387c1ee JB |
434 | /* Display a normal or error message. |
435 | On Windows, use a message box if compiled as a Windows app. */ | |
72b04a8a | 436 | static void message (int, const char *, ...) ATTRIBUTE_FORMAT_PRINTF (2, 3); |
b23b5a5b | 437 | static void |
b0bbc07d | 438 | message (int is_error, const char *format, ...) |
42073bfb | 439 | { |
42073bfb JB |
440 | va_list args; |
441 | ||
b0bbc07d | 442 | va_start (args, format); |
42073bfb JB |
443 | |
444 | #ifdef WINDOWSNT | |
445 | if (w32_window_app ()) | |
446 | { | |
17107bb6 PE |
447 | char msg[2048]; |
448 | vsnprintf (msg, sizeof msg, format, args); | |
449 | msg[sizeof msg - 1] = '\0'; | |
450 | ||
42073bfb JB |
451 | if (is_error) |
452 | MessageBox (NULL, msg, "Emacsclient ERROR", MB_ICONERROR); | |
453 | else | |
454 | MessageBox (NULL, msg, "Emacsclient", MB_ICONINFORMATION); | |
455 | } | |
456 | else | |
457 | #endif | |
9219db75 JB |
458 | { |
459 | FILE *f = is_error ? stderr : stdout; | |
460 | ||
17107bb6 | 461 | vfprintf (f, format, args); |
9219db75 JB |
462 | fflush (f); |
463 | } | |
17107bb6 PE |
464 | |
465 | va_end (args); | |
42073bfb JB |
466 | } |
467 | ||
8f9aaa0a | 468 | /* Decode the options from argv and argc. |
5212210c | 469 | The global variable `optind' will say how many arguments we used up. */ |
8f9aaa0a | 470 | |
b23b5a5b | 471 | static void |
873fbd0b | 472 | decode_options (int argc, char **argv) |
8f9aaa0a | 473 | { |
7ce8671d | 474 | alternate_editor = egetenv ("ALTERNATE_EDITOR"); |
0ea5797a | 475 | |
8f9aaa0a RS |
476 | while (1) |
477 | { | |
dc1cd5f7 | 478 | int opt = getopt_long_only (argc, argv, |
b03d27bd | 479 | #ifndef NO_SOCKETS_IN_FILE_SYSTEM |
3794a2d3 | 480 | "VHneqa:s:f:d:F:tc", |
b03d27bd | 481 | #else |
3794a2d3 | 482 | "VHneqa:f:d:F:tc", |
b03d27bd | 483 | #endif |
974b73e8 | 484 | longopts, 0); |
8f9aaa0a RS |
485 | |
486 | if (opt == EOF) | |
487 | break; | |
488 | ||
489 | switch (opt) | |
490 | { | |
491 | case 0: | |
492 | /* If getopt returns 0, then it has already processed a | |
493 | long-named option. We should do nothing. */ | |
494 | break; | |
e69233c2 | 495 | |
97e3214d GM |
496 | case 'a': |
497 | alternate_editor = optarg; | |
498 | break; | |
e69233c2 | 499 | |
b03d27bd | 500 | #ifndef NO_SOCKETS_IN_FILE_SYSTEM |
254107e4 RS |
501 | case 's': |
502 | socket_name = optarg; | |
503 | break; | |
b03d27bd | 504 | #endif |
254107e4 | 505 | |
aa0b6932 JB |
506 | case 'f': |
507 | server_file = optarg; | |
508 | break; | |
254107e4 | 509 | |
0ea5797a SM |
510 | /* We used to disallow this argument in w32, but it seems better |
511 | to allow it, for the occasional case where the user is | |
512 | connecting with a w32 client to a server compiled with X11 | |
513 | support. */ | |
30be2360 SM |
514 | case 'd': |
515 | display = optarg; | |
516 | break; | |
517 | ||
8f9aaa0a RS |
518 | case 'n': |
519 | nowait = 1; | |
520 | break; | |
521 | ||
30be2360 SM |
522 | case 'e': |
523 | eval = 1; | |
524 | break; | |
525 | ||
0b973fc5 DW |
526 | case 'q': |
527 | quiet = 1; | |
528 | break; | |
529 | ||
8f9aaa0a | 530 | case 'V': |
42073bfb | 531 | message (FALSE, "emacsclient %s\n", VERSION); |
65396510 | 532 | exit (EXIT_SUCCESS); |
8f9aaa0a | 533 | break; |
46cec291 | 534 | |
819b8f00 | 535 | case 't': |
77134727 | 536 | tty = 1; |
c1b8e896 | 537 | current_frame = 0; |
77134727 KL |
538 | break; |
539 | ||
e5299d8d | 540 | case 'c': |
31fa6595 | 541 | current_frame = 0; |
9628b887 | 542 | break; |
0b0d3e0b | 543 | |
0191e222 CY |
544 | case 'p': |
545 | parent_id = optarg; | |
546 | current_frame = 0; | |
547 | break; | |
548 | ||
8f9aaa0a | 549 | case 'H': |
8f9aaa0a | 550 | print_help_and_exit (); |
20c396e8 JB |
551 | break; |
552 | ||
18a4ce5e AR |
553 | case 'F': |
554 | frame_parameters = optarg; | |
555 | break; | |
556 | ||
20c396e8 | 557 | default: |
42073bfb | 558 | message (TRUE, "Try `%s --help' for more information\n", progname); |
65396510 | 559 | exit (EXIT_FAILURE); |
20c396e8 | 560 | break; |
8f9aaa0a RS |
561 | } |
562 | } | |
9628b887 | 563 | |
273b9028 CY |
564 | /* If the -c option is used (without -t) and no --display argument |
565 | is provided, try $DISPLAY. | |
566 | Without the -c option, we used to set `display' to $DISPLAY by | |
567 | default, but this changed the default behavior and is sometimes | |
568 | inconvenient. So we force users to use "--display $DISPLAY" if | |
6b59694e DC |
569 | they want Emacs to connect to their current display. |
570 | ||
571 | Some window systems have a notion of default display not | |
572 | reflected in the DISPLAY variable. If the user didn't give us an | |
573 | explicit display, try this platform-specific after trying the | |
574 | display in DISPLAY (if any). */ | |
09317bf4 | 575 | if (!current_frame && !tty && !display) |
e7534fc4 | 576 | { |
6b59694e DC |
577 | /* Set these here so we use a default_display only when the user |
578 | didn't give us an explicit display. */ | |
579 | #if defined (NS_IMPL_COCOA) | |
580 | alt_display = "ns"; | |
581 | #elif defined (HAVE_NTGUI) | |
efc3dd3c | 582 | alt_display = "w32"; |
e7534fc4 | 583 | #endif |
6b59694e DC |
584 | |
585 | display = egetenv ("DISPLAY"); | |
586 | } | |
587 | ||
588 | if (!display) | |
589 | { | |
590 | display = alt_display; | |
591 | alt_display = NULL; | |
e7534fc4 | 592 | } |
9997dc15 | 593 | |
273b9028 | 594 | /* A null-string display is invalid. */ |
0ea5797a SM |
595 | if (display && strlen (display) == 0) |
596 | display = NULL; | |
597 | ||
273b9028 CY |
598 | /* If no display is available, new frames are tty frames. */ |
599 | if (!current_frame && !display) | |
92071250 | 600 | tty = 1; |
c0f342ab | 601 | |
802bdb3c | 602 | #ifdef WINDOWSNT |
9a864fa2 CY |
603 | /* Emacs on Windows does not support graphical and text terminal |
604 | frames in the same instance. So, treat the -t and -c options as | |
605 | equivalent, and open a new frame on the server's terminal. | |
606 | Ideally, we would only set tty = 1 when the serve is running in a | |
607 | console, but alas we don't know that. As a workaround, always | |
608 | ask for a tty frame, and let server.el figure it out. */ | |
609 | if (!current_frame) | |
610 | { | |
611 | display = NULL; | |
612 | tty = 1; | |
613 | } | |
614 | ||
69157c99 | 615 | if (alternate_editor && alternate_editor[0] == '\0') |
802bdb3c DN |
616 | { |
617 | message (TRUE, "--alternate-editor argument or ALTERNATE_EDITOR variable cannot be\n\ | |
618 | an empty string"); | |
619 | exit (EXIT_FAILURE); | |
620 | } | |
621 | #endif /* WINDOWSNT */ | |
8f9aaa0a RS |
622 | } |
623 | ||
974b73e8 | 624 | \f |
845ca893 | 625 | static _Noreturn void |
873fbd0b | 626 | print_help_and_exit (void) |
8f9aaa0a | 627 | { |
c0f342ab JB |
628 | /* Spaces and tabs are significant in this message; they're chosen so the |
629 | message aligns properly both in a tty and in a Windows message box. | |
630 | Please try to preserve them; otherwise the output is very hard to read | |
631 | when using emacsclientw. */ | |
42073bfb | 632 | message (FALSE, |
974b73e8 | 633 | "Usage: %s [OPTIONS] FILE...\n\ |
30be2360 SM |
634 | Tell the Emacs server to visit the specified files.\n\ |
635 | Every FILE can be either just a FILENAME or [+LINE[:COLUMN]] FILENAME.\n\ | |
20c396e8 | 636 | \n\ |
30be2360 | 637 | The following OPTIONS are accepted:\n\ |
c0f342ab JB |
638 | -V, --version Just print version info and return\n\ |
639 | -H, --help Print this usage information message\n\ | |
dc1cd5f7 | 640 | -nw, -t, --tty Open a new Emacs frame on the current terminal\n\ |
c4b858e3 | 641 | -c, --create-frame Create a new frame instead of trying to\n\ |
9dfda22f | 642 | use the current Emacs frame\n\ |
a150502a | 643 | -F ALIST, --frame-parameters=ALIST\n\ |
5f9388d0 | 644 | Set the parameters of a new frame\n\ |
c0f342ab | 645 | -e, --eval Evaluate the FILE arguments as ELisp expressions\n\ |
d07529f3 | 646 | -n, --no-wait Don't wait for the server to return\n\ |
0b973fc5 | 647 | -q, --quiet Don't display messages on success\n\ |
24d5010d | 648 | -d DISPLAY, --display=DISPLAY\n\ |
0191e222 CY |
649 | Visit the file in the given display\n\ |
650 | --parent-id=ID Open in parent window ID, via XEmbed\n" | |
aa0b6932 | 651 | #ifndef NO_SOCKETS_IN_FILE_SYSTEM |
24d5010d | 652 | "-s SOCKET, --socket-name=SOCKET\n\ |
9dfda22f | 653 | Set filename of the UNIX socket for communication\n" |
aa0b6932 | 654 | #endif |
24d5010d | 655 | "-f SERVER, --server-file=SERVER\n\ |
9dfda22f | 656 | Set filename of the TCP authentication file\n\ |
24d5010d | 657 | -a EDITOR, --alternate-editor=EDITOR\n\ |
9dfda22f | 658 | Editor to fallback to if the server is not running\n" |
6133a1a9 | 659 | #ifndef WINDOWSNT |
c3f995a2 JB |
660 | " If EDITOR is the empty string, start Emacs in daemon\n\ |
661 | mode and try connecting again\n" | |
6133a1a9 | 662 | #endif /* not WINDOWSNT */ |
c3f995a2 | 663 | "\n\ |
5f54cae6 | 664 | Report bugs with M-x report-emacs-bug.\n", progname); |
65396510 | 665 | exit (EXIT_SUCCESS); |
8f9aaa0a | 666 | } |
5212210c | 667 | |
79432772 JB |
668 | /* Try to run a different command, or --if no alternate editor is |
669 | defined-- exit with an errorcode. | |
670 | Uses argv, but gets it from the global variable main_argv. */ | |
671 | ||
845ca893 | 672 | static _Noreturn void |
974b73e8 | 673 | fail (void) |
9002956f | 674 | { |
aa0b6932 | 675 | if (alternate_editor) |
9002956f | 676 | { |
aa0b6932 | 677 | int i = optind - 1; |
4472aef4 | 678 | |
974b73e8 | 679 | execvp (alternate_editor, main_argv + i); |
42073bfb | 680 | message (TRUE, "%s: error executing alternate editor \"%s\"\n", |
974b73e8 | 681 | progname, alternate_editor); |
9002956f | 682 | } |
aa0b6932 | 683 | exit (EXIT_FAILURE); |
9002956f KL |
684 | } |
685 | ||
aa0b6932 | 686 | \f |
1e7823d0 | 687 | #if !defined (HAVE_SOCKETS) || !defined (HAVE_INET_SOCKETS) |
9002956f | 688 | |
aa0b6932 | 689 | int |
0613f5d5 | 690 | main (int argc, char **argv) |
9002956f | 691 | { |
974b73e8 KL |
692 | main_argv = argv; |
693 | progname = argv[0]; | |
694 | message (TRUE, "%s: Sorry, the Emacs server is supported only\n" | |
c0f342ab | 695 | "on systems with Berkeley sockets.\n", |
aa0b6932 | 696 | argv[0]); |
974b73e8 | 697 | fail (); |
9002956f KL |
698 | } |
699 | ||
1e7823d0 | 700 | #else /* HAVE_SOCKETS && HAVE_INET_SOCKETS */ |
2828d5f9 | 701 | |
aa0b6932 JB |
702 | #define AUTH_KEY_LENGTH 64 |
703 | #define SEND_BUFFER_SIZE 4096 | |
704 | ||
aa0b6932 JB |
705 | /* Buffer to accumulate data to send in TCP connections. */ |
706 | char send_buffer[SEND_BUFFER_SIZE + 1]; | |
707 | int sblen = 0; /* Fill pointer for the send buffer. */ | |
4b7b77f6 JR |
708 | /* Socket used to communicate with the Emacs server process. */ |
709 | HSOCKET emacs_socket = 0; | |
aa0b6932 | 710 | |
79432772 JB |
711 | /* On Windows, the socket library was historically separate from the |
712 | standard C library, so errors are handled differently. */ | |
713 | ||
b23b5a5b | 714 | static void |
988e88ab | 715 | sock_err_message (const char *function_name) |
d22b00e5 JR |
716 | { |
717 | #ifdef WINDOWSNT | |
718 | char* msg = NULL; | |
719 | ||
720 | FormatMessage (FORMAT_MESSAGE_FROM_SYSTEM | |
721 | | FORMAT_MESSAGE_ALLOCATE_BUFFER | |
722 | | FORMAT_MESSAGE_ARGUMENT_ARRAY, | |
723 | NULL, WSAGetLastError (), 0, (LPTSTR)&msg, 0, NULL); | |
724 | ||
725 | message (TRUE, "%s: %s: %s\n", progname, function_name, msg); | |
726 | ||
727 | LocalFree (msg); | |
728 | #else | |
729 | message (TRUE, "%s: %s: %s\n", progname, function_name, strerror (errno)); | |
730 | #endif | |
731 | } | |
732 | ||
733 | ||
aa0b6932 JB |
734 | /* Let's send the data to Emacs when either |
735 | - the data ends in "\n", or | |
736 | - the buffer is full (but this shouldn't happen) | |
737 | Otherwise, we just accumulate it. */ | |
b23b5a5b | 738 | static void |
988e88ab | 739 | send_to_emacs (HSOCKET s, const char *data) |
aa0b6932 | 740 | { |
1e6f32f8 JM |
741 | size_t dlen; |
742 | ||
743 | if (!data) | |
744 | return; | |
745 | ||
746 | dlen = strlen (data); | |
747 | while (*data) | |
2828d5f9 | 748 | { |
1e6f32f8 JM |
749 | size_t part = min (dlen, SEND_BUFFER_SIZE - sblen); |
750 | memcpy (&send_buffer[sblen], data, part); | |
751 | data += part; | |
752 | sblen += part; | |
aa0b6932 JB |
753 | |
754 | if (sblen == SEND_BUFFER_SIZE | |
755 | || (sblen > 0 && send_buffer[sblen-1] == '\n')) | |
756 | { | |
757 | int sent = send (s, send_buffer, sblen, 0); | |
1e6f32f8 JM |
758 | if (sent < 0) |
759 | { | |
760 | message (TRUE, "%s: failed to send %d bytes to socket: %s\n", | |
761 | progname, sblen, strerror (errno)); | |
762 | fail (); | |
763 | } | |
aa0b6932 | 764 | if (sent != sblen) |
1e6f32f8 | 765 | memmove (send_buffer, &send_buffer[sent], sblen - sent); |
aa0b6932 JB |
766 | sblen -= sent; |
767 | } | |
1e6f32f8 JM |
768 | |
769 | dlen -= part; | |
2828d5f9 | 770 | } |
2828d5f9 | 771 | } |
2828d5f9 KL |
772 | |
773 | \f | |
0b0d3e0b | 774 | /* In STR, insert a & before each &, each space, each newline, and |
a4cf2096 | 775 | any initial -. Change spaces to underscores, too, so that the |
0b0d3e0b KL |
776 | return value never contains a space. |
777 | ||
3a35a84c | 778 | Does not change the string. Outputs the result to S. */ |
b23b5a5b | 779 | static void |
988e88ab | 780 | quote_argument (HSOCKET s, const char *str) |
5212210c | 781 | { |
9002956f | 782 | char *copy = (char *) xmalloc (strlen (str) * 2 + 1); |
988e88ab J |
783 | const char *p; |
784 | char *q; | |
5212210c | 785 | |
0b0d3e0b | 786 | p = str; |
5212210c RS |
787 | q = copy; |
788 | while (*p) | |
789 | { | |
790 | if (*p == ' ') | |
791 | { | |
f1db6a73 | 792 | *q++ = '&'; |
5212210c RS |
793 | *q++ = '_'; |
794 | p++; | |
795 | } | |
3cf8c6aa SM |
796 | else if (*p == '\n') |
797 | { | |
798 | *q++ = '&'; | |
799 | *q++ = 'n'; | |
800 | p++; | |
801 | } | |
5212210c RS |
802 | else |
803 | { | |
0b0d3e0b | 804 | if (*p == '&' || (*p == '-' && p == str)) |
f1db6a73 | 805 | *q++ = '&'; |
5212210c RS |
806 | *q++ = *p++; |
807 | } | |
808 | } | |
f1db6a73 | 809 | *q++ = 0; |
5212210c | 810 | |
486ba65f | 811 | send_to_emacs (s, copy); |
87209357 EZ |
812 | |
813 | free (copy); | |
5212210c | 814 | } |
0c76956f | 815 | |
0b0d3e0b KL |
816 | |
817 | /* The inverse of quote_argument. Removes quoting in string STR by | |
79432772 | 818 | modifying the string in place. Returns STR. */ |
0b0d3e0b | 819 | |
b23b5a5b | 820 | static char * |
873fbd0b | 821 | unquote_argument (char *str) |
0b0d3e0b KL |
822 | { |
823 | char *p, *q; | |
824 | ||
825 | if (! str) | |
826 | return str; | |
827 | ||
828 | p = str; | |
829 | q = str; | |
830 | while (*p) | |
831 | { | |
832 | if (*p == '&') | |
833 | { | |
834 | p++; | |
835 | if (*p == '&') | |
836 | *p = '&'; | |
837 | else if (*p == '_') | |
838 | *p = ' '; | |
839 | else if (*p == 'n') | |
840 | *p = '\n'; | |
841 | else if (*p == '-') | |
842 | *p = '-'; | |
843 | } | |
844 | *q++ = *p++; | |
845 | } | |
846 | *q = 0; | |
847 | return str; | |
848 | } | |
849 | ||
8f9aaa0a | 850 | \f |
b23b5a5b | 851 | static int |
03fc768b | 852 | file_name_absolute_p (const char *filename) |
b03d27bd JB |
853 | { |
854 | /* Sanity check, it shouldn't happen. */ | |
855 | if (! filename) return FALSE; | |
856 | ||
857 | /* /xxx is always an absolute path. */ | |
858 | if (filename[0] == '/') return TRUE; | |
859 | ||
860 | /* Empty filenames (which shouldn't happen) are relative. */ | |
861 | if (filename[0] == '\0') return FALSE; | |
862 | ||
863 | #ifdef WINDOWSNT | |
71b8f735 | 864 | /* X:\xxx is always absolute. */ |
03fc768b | 865 | if (isalpha ((unsigned char) filename[0]) |
cb0297bb | 866 | && filename[1] == ':' && (filename[2] == '\\' || filename[2] == '/')) |
b03d27bd JB |
867 | return TRUE; |
868 | ||
869 | /* Both \xxx and \\xxx\yyy are absolute. */ | |
870 | if (filename[0] == '\\') return TRUE; | |
871 | #endif | |
872 | ||
873 | return FALSE; | |
874 | } | |
875 | ||
aa0b6932 | 876 | #ifdef WINDOWSNT |
f0384499 | 877 | /* Wrapper to make WSACleanup a cdecl, as required by atexit. */ |
7c3320d8 JB |
878 | void __cdecl |
879 | close_winsock (void) | |
aa0b6932 JB |
880 | { |
881 | WSACleanup (); | |
882 | } | |
0c76956f | 883 | |
b03d27bd JB |
884 | /* Initialize the WinSock2 library. */ |
885 | void | |
7c3320d8 | 886 | initialize_sockets (void) |
0c76956f | 887 | { |
aa0b6932 JB |
888 | WSADATA wsaData; |
889 | ||
aa0b6932 JB |
890 | if (WSAStartup (MAKEWORD (2, 0), &wsaData)) |
891 | { | |
78da39c6 | 892 | message (TRUE, "%s: error initializing WinSock2\n", progname); |
aa0b6932 JB |
893 | exit (EXIT_FAILURE); |
894 | } | |
895 | ||
896 | atexit (close_winsock); | |
0c76956f | 897 | } |
e35fc962 | 898 | #endif /* WINDOWSNT */ |
974b73e8 | 899 | |
8f9aaa0a | 900 | \f |
79432772 JB |
901 | /* Read the information needed to set up a TCP comm channel with |
902 | the Emacs server: host, port, and authentication string. */ | |
903 | ||
b23b5a5b | 904 | static int |
6b0c8984 AS |
905 | get_server_config (const char *config_file, struct sockaddr_in *server, |
906 | char *authentication) | |
97e3214d | 907 | { |
aa0b6932 JB |
908 | char dotted[32]; |
909 | char *port; | |
b03d27bd | 910 | FILE *config = NULL; |
aa0b6932 | 911 | |
6b0c8984 AS |
912 | if (file_name_absolute_p (config_file)) |
913 | config = fopen (config_file, "rb"); | |
b03d27bd | 914 | else |
97e3214d | 915 | { |
b9170155 | 916 | const char *home = egetenv ("HOME"); |
88b46d84 | 917 | |
aa0b6932 JB |
918 | if (home) |
919 | { | |
6b0c8984 | 920 | char *path = xmalloc (strlen (home) + strlen (config_file) |
17107bb6 PE |
921 | + EXTRA_SPACE); |
922 | strcpy (path, home); | |
923 | strcat (path, "/.emacs.d/server/"); | |
6b0c8984 | 924 | strcat (path, config_file); |
aa0b6932 | 925 | config = fopen (path, "rb"); |
17107bb6 | 926 | free (path); |
aa0b6932 | 927 | } |
88b46d84 | 928 | #ifdef WINDOWSNT |
7ce8671d | 929 | if (!config && (home = egetenv ("APPDATA"))) |
88b46d84 | 930 | { |
6b0c8984 | 931 | char *path = xmalloc (strlen (home) + strlen (config_file) |
17107bb6 PE |
932 | + EXTRA_SPACE); |
933 | strcpy (path, home); | |
934 | strcat (path, "/.emacs.d/server/"); | |
6b0c8984 | 935 | strcat (path, config_file); |
88b46d84 | 936 | config = fopen (path, "rb"); |
17107bb6 | 937 | free (path); |
88b46d84 JB |
938 | } |
939 | #endif | |
aa0b6932 JB |
940 | } |
941 | ||
942 | if (! config) | |
943 | return FALSE; | |
944 | ||
945 | if (fgets (dotted, sizeof dotted, config) | |
968ef9b4 JB |
946 | && (port = strchr (dotted, ':'))) |
947 | *port++ = '\0'; | |
97e3214d GM |
948 | else |
949 | { | |
78da39c6 | 950 | message (TRUE, "%s: invalid configuration info\n", progname); |
65396510 | 951 | exit (EXIT_FAILURE); |
97e3214d | 952 | } |
97e3214d | 953 | |
aa0b6932 JB |
954 | server->sin_family = AF_INET; |
955 | server->sin_addr.s_addr = inet_addr (dotted); | |
956 | server->sin_port = htons (atoi (port)); | |
97e3214d | 957 | |
aa0b6932 JB |
958 | if (! fread (authentication, AUTH_KEY_LENGTH, 1, config)) |
959 | { | |
78da39c6 | 960 | message (TRUE, "%s: cannot read authentication info\n", progname); |
aa0b6932 JB |
961 | exit (EXIT_FAILURE); |
962 | } | |
46cec291 | 963 | |
aa0b6932 | 964 | fclose (config); |
97e3214d | 965 | |
aa0b6932 | 966 | return TRUE; |
97e3214d GM |
967 | } |
968 | ||
b23b5a5b | 969 | static HSOCKET |
6b0c8984 | 970 | set_tcp_socket (const char *local_server_file) |
aa0b6932 JB |
971 | { |
972 | HSOCKET s; | |
973 | struct sockaddr_in server; | |
aa0b6932 JB |
974 | struct linger l_arg = {1, 1}; |
975 | char auth_string[AUTH_KEY_LENGTH + 1]; | |
9628b887 | 976 | |
6b0c8984 | 977 | if (! get_server_config (local_server_file, &server, auth_string)) |
aa0b6932 JB |
978 | return INVALID_SOCKET; |
979 | ||
0b973fc5 | 980 | if (server.sin_addr.s_addr != inet_addr ("127.0.0.1") && !quiet) |
9219db75 | 981 | message (FALSE, "%s: connected to remote socket at %s\n", |
b03d27bd JB |
982 | progname, inet_ntoa (server.sin_addr)); |
983 | ||
79432772 | 984 | /* Open up an AF_INET socket. */ |
aa0b6932 JB |
985 | if ((s = socket (AF_INET, SOCK_STREAM, IPPROTO_TCP)) < 0) |
986 | { | |
d22b00e5 | 987 | sock_err_message ("socket"); |
aa0b6932 JB |
988 | return INVALID_SOCKET; |
989 | } | |
990 | ||
79432772 | 991 | /* Set up the socket. */ |
aa0b6932 JB |
992 | if (connect (s, (struct sockaddr *) &server, sizeof server) < 0) |
993 | { | |
d22b00e5 | 994 | sock_err_message ("connect"); |
aa0b6932 JB |
995 | return INVALID_SOCKET; |
996 | } | |
997 | ||
aa0b6932 JB |
998 | setsockopt (s, SOL_SOCKET, SO_LINGER, (char *) &l_arg, sizeof l_arg); |
999 | ||
79432772 | 1000 | /* Send the authentication. */ |
aa0b6932 JB |
1001 | auth_string[AUTH_KEY_LENGTH] = '\0'; |
1002 | ||
486ba65f JR |
1003 | send_to_emacs (s, "-auth "); |
1004 | send_to_emacs (s, auth_string); | |
5ab73228 | 1005 | send_to_emacs (s, " "); |
aa0b6932 JB |
1006 | |
1007 | return s; | |
1008 | } | |
1009 | ||
b2ff54a0 JR |
1010 | |
1011 | /* Returns 1 if PREFIX is a prefix of STRING. */ | |
1012 | static int | |
988e88ab | 1013 | strprefix (const char *prefix, const char *string) |
b2ff54a0 | 1014 | { |
cb06b8dc | 1015 | return !strncmp (prefix, string, strlen (prefix)); |
b2ff54a0 JR |
1016 | } |
1017 | ||
a336ee5b CY |
1018 | /* Get tty name and type. If successful, return the type in TTY_TYPE |
1019 | and the name in TTY_NAME, and return 1. Otherwise, fail if NOABORT | |
1020 | is zero, or return 0 if NOABORT is non-zero. */ | |
1021 | ||
b23b5a5b | 1022 | static int |
b9170155 | 1023 | find_tty (const char **tty_type, const char **tty_name, int noabort) |
a336ee5b | 1024 | { |
b9170155 PE |
1025 | const char *type = egetenv ("TERM"); |
1026 | const char *name = ttyname (fileno (stdout)); | |
a336ee5b CY |
1027 | |
1028 | if (!name) | |
1029 | { | |
1030 | if (noabort) | |
1031 | return 0; | |
1032 | else | |
1033 | { | |
1034 | message (TRUE, "%s: could not get terminal name\n", progname); | |
1035 | fail (); | |
1036 | } | |
1037 | } | |
1038 | ||
1039 | if (!type) | |
1040 | { | |
1041 | if (noabort) | |
1042 | return 0; | |
1043 | else | |
1044 | { | |
1045 | message (TRUE, "%s: please set the TERM variable to your terminal type\n", | |
1046 | progname); | |
1047 | fail (); | |
1048 | } | |
1049 | } | |
1050 | ||
1051 | if (strcmp (type, "eterm") == 0) | |
1052 | { | |
1053 | if (noabort) | |
1054 | return 0; | |
1055 | else | |
1056 | { | |
1057 | /* This causes nasty, MULTI_KBOARD-related input lockouts. */ | |
1058 | message (TRUE, "%s: opening a frame in an Emacs term buffer" | |
1059 | " is not supported\n", progname); | |
1060 | fail (); | |
1061 | } | |
1062 | } | |
1063 | ||
1064 | *tty_name = name; | |
1065 | *tty_type = type; | |
1066 | return 1; | |
1067 | } | |
1068 | ||
b2ff54a0 | 1069 | |
aa0b6932 | 1070 | #if !defined (NO_SOCKETS_IN_FILE_SYSTEM) |
46cec291 | 1071 | |
9f637eea GM |
1072 | /* Three possibilities: |
1073 | 2 - can't be `stat'ed (sets errno) | |
1074 | 1 - isn't owned by us | |
1075 | 0 - success: none of the above */ | |
1076 | ||
1077 | static int | |
fe91f5a0 | 1078 | socket_status (const char *name) |
9f637eea GM |
1079 | { |
1080 | struct stat statbfr; | |
1081 | ||
b0bbc07d | 1082 | if (stat (name, &statbfr) == -1) |
9f637eea GM |
1083 | return 2; |
1084 | ||
1085 | if (statbfr.st_uid != geteuid ()) | |
1086 | return 1; | |
0b0d3e0b | 1087 | |
9f637eea GM |
1088 | return 0; |
1089 | } | |
1090 | ||
974b73e8 | 1091 | \f |
da8e1115 KL |
1092 | /* A signal handler that passes the signal to the Emacs process. |
1093 | Useful for SIGWINCH. */ | |
1094 | ||
9af30bdf | 1095 | static void |
428a555e | 1096 | pass_signal_to_emacs (int signalnum) |
9628b887 KL |
1097 | { |
1098 | int old_errno = errno; | |
1099 | ||
9f729af5 | 1100 | if (emacs_pid) |
428a555e | 1101 | kill (emacs_pid, signalnum); |
9f729af5 | 1102 | |
428a555e | 1103 | signal (signalnum, pass_signal_to_emacs); |
9f729af5 KL |
1104 | errno = old_errno; |
1105 | } | |
1106 | ||
0b0d3e0b KL |
1107 | /* Signal handler for SIGCONT; notify the Emacs process that it can |
1108 | now resume our tty frame. */ | |
1109 | ||
9af30bdf | 1110 | static void |
0b0d3e0b KL |
1111 | handle_sigcont (int signalnum) |
1112 | { | |
1113 | int old_errno = errno; | |
1114 | ||
1115 | if (tcgetpgrp (1) == getpgrp ()) | |
1116 | { | |
1117 | /* We are in the foreground. */ | |
486ba65f | 1118 | send_to_emacs (emacs_socket, "-resume \n"); |
0b0d3e0b KL |
1119 | } |
1120 | else | |
1121 | { | |
1122 | /* We are in the background; cancel the continue. */ | |
a7db35b3 | 1123 | raise (SIGSTOP); |
0b0d3e0b | 1124 | } |
c6c53c3e KL |
1125 | |
1126 | signal (signalnum, handle_sigcont); | |
0b0d3e0b KL |
1127 | errno = old_errno; |
1128 | } | |
1129 | ||
1130 | /* Signal handler for SIGTSTP; notify the Emacs process that we are | |
1131 | going to sleep. Normally the suspend is initiated by Emacs via | |
1132 | server-handle-suspend-tty, but if the server gets out of sync with | |
1133 | reality, we may get a SIGTSTP on C-z. Handling this signal and | |
79432772 | 1134 | notifying Emacs about it should get things under control again. */ |
0b0d3e0b | 1135 | |
9af30bdf | 1136 | static void |
0b0d3e0b KL |
1137 | handle_sigtstp (int signalnum) |
1138 | { | |
1139 | int old_errno = errno; | |
1140 | sigset_t set; | |
c0f342ab | 1141 | |
90843190 | 1142 | if (emacs_socket) |
486ba65f | 1143 | send_to_emacs (emacs_socket, "-suspend \n"); |
0b0d3e0b | 1144 | |
5ab73228 | 1145 | /* Unblock this signal and call the default handler by temporarily |
8350f087 | 1146 | changing the handler and resignaling. */ |
0b0d3e0b KL |
1147 | sigprocmask (SIG_BLOCK, NULL, &set); |
1148 | sigdelset (&set, signalnum); | |
1149 | signal (signalnum, SIG_DFL); | |
a7db35b3 | 1150 | raise (signalnum); |
0b0d3e0b KL |
1151 | sigprocmask (SIG_SETMASK, &set, NULL); /* Let's the above signal through. */ |
1152 | signal (signalnum, handle_sigtstp); | |
1153 | ||
1154 | errno = old_errno; | |
1155 | } | |
273b9028 CY |
1156 | |
1157 | ||
da8e1115 | 1158 | /* Set up signal handlers before opening a frame on the current tty. */ |
0b0d3e0b | 1159 | |
b23b5a5b | 1160 | static void |
4d553a13 | 1161 | init_signals (void) |
9628b887 KL |
1162 | { |
1163 | /* Set up signal handlers. */ | |
428a555e | 1164 | signal (SIGWINCH, pass_signal_to_emacs); |
4ca927b4 KL |
1165 | |
1166 | /* Don't pass SIGINT and SIGQUIT to Emacs, because it has no way of | |
1167 | deciding which terminal the signal came from. C-g is now a | |
1168 | normal input event on secondary terminals. */ | |
1169 | #if 0 | |
428a555e KL |
1170 | signal (SIGINT, pass_signal_to_emacs); |
1171 | signal (SIGQUIT, pass_signal_to_emacs); | |
4ca927b4 | 1172 | #endif |
0b0d3e0b KL |
1173 | |
1174 | signal (SIGCONT, handle_sigcont); | |
1175 | signal (SIGTSTP, handle_sigtstp); | |
1176 | signal (SIGTTOU, handle_sigtstp); | |
9628b887 KL |
1177 | } |
1178 | ||
46cec291 | 1179 | |
b23b5a5b | 1180 | static HSOCKET |
6b0c8984 | 1181 | set_local_socket (const char *local_socket_name) |
46cec291 | 1182 | { |
aa0b6932 | 1183 | HSOCKET s; |
46cec291 | 1184 | struct sockaddr_un server; |
46cec291 | 1185 | |
79432772 | 1186 | /* Open up an AF_UNIX socket in this person's home directory. */ |
46cec291 RS |
1187 | if ((s = socket (AF_UNIX, SOCK_STREAM, 0)) < 0) |
1188 | { | |
42073bfb | 1189 | message (TRUE, "%s: socket: %s\n", progname, strerror (errno)); |
aa0b6932 | 1190 | return INVALID_SOCKET; |
46cec291 | 1191 | } |
e69233c2 | 1192 | |
46cec291 | 1193 | server.sun_family = AF_UNIX; |
c5fee545 | 1194 | |
c5fee545 | 1195 | { |
6b0c8984 AS |
1196 | int sock_status; |
1197 | int use_tmpdir = 0; | |
1198 | int saved_errno; | |
1199 | const char *server_name = local_socket_name; | |
4be3dfc5 | 1200 | const char *tmpdir IF_LINT ( = NULL); |
17107bb6 PE |
1201 | char *tmpdir_storage = NULL; |
1202 | char *socket_name_storage = NULL; | |
0b0d3e0b | 1203 | |
6b0c8984 | 1204 | if (!strchr (local_socket_name, '/') && !strchr (local_socket_name, '\\')) |
8966b757 AS |
1205 | { |
1206 | /* socket_name is a file name component. */ | |
17107bb6 PE |
1207 | long uid = geteuid (); |
1208 | ptrdiff_t tmpdirlen; | |
6b0c8984 | 1209 | use_tmpdir = 1; |
f77b11a0 JB |
1210 | tmpdir = egetenv ("TMPDIR"); |
1211 | if (!tmpdir) | |
b336bfcd GM |
1212 | { |
1213 | #ifdef DARWIN_OS | |
e6068ab3 YM |
1214 | #ifndef _CS_DARWIN_USER_TEMP_DIR |
1215 | #define _CS_DARWIN_USER_TEMP_DIR 65537 | |
1216 | #endif | |
b336bfcd GM |
1217 | size_t n = confstr (_CS_DARWIN_USER_TEMP_DIR, NULL, (size_t) 0); |
1218 | if (n > 0) | |
1219 | { | |
17107bb6 | 1220 | tmpdir = tmpdir_storage = xmalloc (n); |
dd1ff7c0 | 1221 | confstr (_CS_DARWIN_USER_TEMP_DIR, tmpdir_storage, n); |
b336bfcd GM |
1222 | } |
1223 | else | |
1224 | #endif | |
1225 | tmpdir = "/tmp"; | |
1226 | } | |
17107bb6 | 1227 | tmpdirlen = strlen (tmpdir); |
6b0c8984 | 1228 | socket_name_storage = |
17107bb6 | 1229 | xmalloc (tmpdirlen + strlen (server_name) + EXTRA_SPACE); |
6b0c8984 AS |
1230 | strcpy (socket_name_storage, tmpdir); |
1231 | sprintf (socket_name_storage + tmpdirlen, "/emacs%ld/", uid); | |
1232 | strcat (socket_name_storage + tmpdirlen, server_name); | |
1233 | local_socket_name = socket_name_storage; | |
254107e4 RS |
1234 | } |
1235 | ||
6b0c8984 AS |
1236 | if (strlen (local_socket_name) < sizeof (server.sun_path)) |
1237 | strcpy (server.sun_path, local_socket_name); | |
254107e4 | 1238 | else |
819b8f00 | 1239 | { |
78da39c6 | 1240 | message (TRUE, "%s: socket-name %s too long\n", |
6b0c8984 | 1241 | progname, local_socket_name); |
819b8f00 KL |
1242 | fail (); |
1243 | } | |
efb859b4 | 1244 | |
9f637eea GM |
1245 | /* See if the socket exists, and if it's owned by us. */ |
1246 | sock_status = socket_status (server.sun_path); | |
152b6e83 | 1247 | saved_errno = errno; |
6b0c8984 | 1248 | if (sock_status && use_tmpdir) |
efb859b4 | 1249 | { |
9f637eea GM |
1250 | /* Failing that, see if LOGNAME or USER exist and differ from |
1251 | our euid. If so, look for a socket based on the UID | |
1252 | associated with the name. This is reminiscent of the logic | |
1253 | that init_editfns uses to set the global Vuser_full_name. */ | |
e69233c2 | 1254 | |
b9170155 | 1255 | const char *user_name = egetenv ("LOGNAME"); |
293f9f2a | 1256 | |
9f637eea | 1257 | if (!user_name) |
b9170155 | 1258 | user_name = egetenv ("USER"); |
e69233c2 | 1259 | |
9f637eea GM |
1260 | if (user_name) |
1261 | { | |
1262 | struct passwd *pw = getpwnam (user_name); | |
293f9f2a | 1263 | |
9f637eea GM |
1264 | if (pw && (pw->pw_uid != geteuid ())) |
1265 | { | |
1266 | /* We're running under su, apparently. */ | |
17107bb6 PE |
1267 | long uid = pw->pw_uid; |
1268 | ptrdiff_t tmpdirlen = strlen (tmpdir); | |
6b0c8984 AS |
1269 | char *user_socket_name |
1270 | = xmalloc (tmpdirlen + strlen (server_name) + EXTRA_SPACE); | |
1271 | strcpy (user_socket_name, tmpdir); | |
1272 | sprintf (user_socket_name + tmpdirlen, "/emacs%ld/", uid); | |
1273 | strcat (user_socket_name + tmpdirlen, server_name); | |
1274 | ||
1275 | if (strlen (user_socket_name) < sizeof (server.sun_path)) | |
1276 | strcpy (server.sun_path, user_socket_name); | |
5c9659d3 SM |
1277 | else |
1278 | { | |
78da39c6 | 1279 | message (TRUE, "%s: socket-name %s too long\n", |
6b0c8984 | 1280 | progname, user_socket_name); |
65396510 | 1281 | exit (EXIT_FAILURE); |
5c9659d3 | 1282 | } |
6b0c8984 | 1283 | free (user_socket_name); |
5c9659d3 | 1284 | |
9f637eea | 1285 | sock_status = socket_status (server.sun_path); |
b80bf66e | 1286 | saved_errno = errno; |
9f637eea | 1287 | } |
293f9f2a RS |
1288 | else |
1289 | errno = saved_errno; | |
9f637eea | 1290 | } |
efb859b4 | 1291 | } |
e69233c2 | 1292 | |
17107bb6 PE |
1293 | free (socket_name_storage); |
1294 | free (tmpdir_storage); | |
1295 | ||
aa0b6932 JB |
1296 | switch (sock_status) |
1297 | { | |
1298 | case 1: | |
974b73e8 KL |
1299 | /* There's a socket, but it isn't owned by us. This is OK if |
1300 | we are root. */ | |
1301 | if (0 != geteuid ()) | |
1302 | { | |
1303 | message (TRUE, "%s: Invalid socket owner\n", progname); | |
aa0b6932 | 1304 | return INVALID_SOCKET; |
974b73e8 KL |
1305 | } |
1306 | break; | |
aa0b6932 JB |
1307 | |
1308 | case 2: | |
974b73e8 KL |
1309 | /* `stat' failed */ |
1310 | if (saved_errno == ENOENT) | |
1311 | message (TRUE, | |
1312 | "%s: can't find socket; have you started the server?\n\ | |
45adde32 | 1313 | To start the server in Emacs, type \"M-x server-start\".\n", |
aa0b6932 | 1314 | progname); |
974b73e8 KL |
1315 | else |
1316 | message (TRUE, "%s: can't stat %s: %s\n", | |
aa0b6932 | 1317 | progname, server.sun_path, strerror (saved_errno)); |
974b73e8 | 1318 | return INVALID_SOCKET; |
aa0b6932 | 1319 | } |
efb859b4 | 1320 | } |
46cec291 | 1321 | |
4e23f2ba JB |
1322 | if (connect (s, (struct sockaddr *) &server, strlen (server.sun_path) + 2) |
1323 | < 0) | |
46cec291 | 1324 | { |
42073bfb | 1325 | message (TRUE, "%s: connect: %s\n", progname, strerror (errno)); |
aa0b6932 | 1326 | return INVALID_SOCKET; |
46cec291 | 1327 | } |
23a7488d | 1328 | |
aa0b6932 JB |
1329 | return s; |
1330 | } | |
1331 | #endif /* ! NO_SOCKETS_IN_FILE_SYSTEM */ | |
1332 | ||
b23b5a5b | 1333 | static HSOCKET |
636b507b | 1334 | set_socket (int no_exit_if_error) |
aa0b6932 | 1335 | { |
b03d27bd | 1336 | HSOCKET s; |
6b0c8984 | 1337 | const char *local_server_file = server_file; |
c0f342ab | 1338 | |
b03d27bd | 1339 | INITIALIZE (); |
c0f342ab | 1340 | |
aa0b6932 | 1341 | #ifndef NO_SOCKETS_IN_FILE_SYSTEM |
b03d27bd JB |
1342 | /* Explicit --socket-name argument. */ |
1343 | if (socket_name) | |
46cec291 | 1344 | { |
6b0c8984 | 1345 | s = set_local_socket (socket_name); |
636b507b | 1346 | if ((s != INVALID_SOCKET) || no_exit_if_error) |
974b73e8 | 1347 | return s; |
355a326e | 1348 | message (TRUE, "%s: error accessing socket \"%s\"\n", |
974b73e8 | 1349 | progname, socket_name); |
b03d27bd | 1350 | exit (EXIT_FAILURE); |
46cec291 | 1351 | } |
b03d27bd JB |
1352 | #endif |
1353 | ||
1354 | /* Explicit --server-file arg or EMACS_SERVER_FILE variable. */ | |
6b0c8984 AS |
1355 | if (!local_server_file) |
1356 | local_server_file = egetenv ("EMACS_SERVER_FILE"); | |
46cec291 | 1357 | |
6b0c8984 | 1358 | if (local_server_file) |
23a7488d | 1359 | { |
6b0c8984 | 1360 | s = set_tcp_socket (local_server_file); |
636b507b | 1361 | if ((s != INVALID_SOCKET) || no_exit_if_error) |
974b73e8 | 1362 | return s; |
c0f342ab | 1363 | |
78da39c6 | 1364 | message (TRUE, "%s: error accessing server file \"%s\"\n", |
6b0c8984 | 1365 | progname, local_server_file); |
b03d27bd | 1366 | exit (EXIT_FAILURE); |
23a7488d | 1367 | } |
c0f342ab | 1368 | |
b03d27bd JB |
1369 | #ifndef NO_SOCKETS_IN_FILE_SYSTEM |
1370 | /* Implicit local socket. */ | |
6b0c8984 | 1371 | s = set_local_socket ("server"); |
b03d27bd JB |
1372 | if (s != INVALID_SOCKET) |
1373 | return s; | |
1374 | #endif | |
23a7488d | 1375 | |
b03d27bd | 1376 | /* Implicit server file. */ |
6b0c8984 | 1377 | s = set_tcp_socket ("server"); |
636b507b | 1378 | if ((s != INVALID_SOCKET) || no_exit_if_error) |
b03d27bd JB |
1379 | return s; |
1380 | ||
1381 | /* No implicit or explicit socket, and no alternate editor. */ | |
42073bfb | 1382 | message (TRUE, "%s: No socket or alternate editor. Please use:\n\n" |
b03d27bd JB |
1383 | #ifndef NO_SOCKETS_IN_FILE_SYSTEM |
1384 | "\t--socket-name\n" | |
ee6a193c | 1385 | #endif |
b03d27bd JB |
1386 | "\t--server-file (or environment variable EMACS_SERVER_FILE)\n\ |
1387 | \t--alternate-editor (or environment variable ALTERNATE_EDITOR)\n", | |
1388 | progname); | |
1389 | exit (EXIT_FAILURE); | |
aa0b6932 | 1390 | } |
46cec291 | 1391 | |
5e0944c6 | 1392 | #ifdef HAVE_NTGUI |
0e0dced5 JB |
1393 | FARPROC set_fg; /* Pointer to AllowSetForegroundWindow. */ |
1394 | FARPROC get_wc; /* Pointer to RealGetWindowClassA. */ | |
1395 | ||
5e0944c6 DC |
1396 | void |
1397 | w32_set_user_model_id (void) | |
1398 | { | |
1399 | HMODULE shell; | |
1400 | HRESULT (WINAPI * set_user_model) (wchar_t * id); | |
1401 | ||
1402 | /* On Windows 7 and later, we need to set the user model ID | |
1403 | to associate emacsclient launched files with Emacs frames | |
1404 | in the UI. */ | |
1405 | shell = LoadLibrary ("shell32.dll"); | |
1406 | if (shell) | |
1407 | { | |
1408 | set_user_model | |
1409 | = (void *) GetProcAddress (shell, | |
1410 | "SetCurrentProcessExplicitAppUserModelID"); | |
1411 | /* If the function is defined, then we are running on Windows 7 | |
1412 | or newer, and the UI uses this to group related windows | |
1413 | together. Since emacs, runemacs, emacsclient are related, we | |
1414 | want them grouped even though the executables are different, | |
1415 | so we need to set a consistent ID between them. */ | |
1416 | if (set_user_model) | |
1417 | set_user_model (L"GNU.Emacs"); | |
1418 | ||
1419 | FreeLibrary (shell); | |
1420 | } | |
1421 | } | |
1422 | ||
0e0dced5 | 1423 | BOOL CALLBACK |
7c3320d8 | 1424 | w32_find_emacs_process (HWND hWnd, LPARAM lParam) |
0e0dced5 JB |
1425 | { |
1426 | DWORD pid; | |
1427 | char class[6]; | |
1428 | ||
1429 | /* Reject any window not of class "Emacs". */ | |
1430 | if (! get_wc (hWnd, class, sizeof (class)) | |
1431 | || strcmp (class, "Emacs")) | |
1432 | return TRUE; | |
1433 | ||
1434 | /* We only need the process id, not the thread id. */ | |
1435 | (void) GetWindowThreadProcessId (hWnd, &pid); | |
1436 | ||
1437 | /* Not the one we're looking for. */ | |
1438 | if (pid != (DWORD) emacs_pid) return TRUE; | |
1439 | ||
1440 | /* OK, let's raise it. */ | |
1441 | set_fg (emacs_pid); | |
1442 | ||
1443 | /* Stop enumeration. */ | |
1444 | return FALSE; | |
1445 | } | |
1446 | ||
79432772 JB |
1447 | /* Search for a window of class "Emacs" and owned by a process with |
1448 | process id = emacs_pid. If found, allow it to grab the focus. */ | |
1449 | ||
0e0dced5 | 1450 | void |
7c3320d8 | 1451 | w32_give_focus (void) |
0e0dced5 | 1452 | { |
ff90fbde | 1453 | HANDLE user32; |
0e0dced5 | 1454 | |
71b8f735 | 1455 | /* It shouldn't happen when dealing with TCP sockets. */ |
0e0dced5 JB |
1456 | if (!emacs_pid) return; |
1457 | ||
ff90fbde JR |
1458 | user32 = GetModuleHandle ("user32.dll"); |
1459 | ||
1460 | if (!user32) | |
1461 | return; | |
0e0dced5 JB |
1462 | |
1463 | /* Modern Windows restrict which processes can set the foreground window. | |
1464 | emacsclient can allow Emacs to grab the focus by calling the function | |
1465 | AllowSetForegroundWindow. Unfortunately, older Windows (W95, W98 and | |
1466 | NT) lack this function, so we have to check its availability. */ | |
ff90fbde JR |
1467 | if ((set_fg = GetProcAddress (user32, "AllowSetForegroundWindow")) |
1468 | && (get_wc = GetProcAddress (user32, "RealGetWindowClassA"))) | |
0e0dced5 | 1469 | EnumWindows (w32_find_emacs_process, (LPARAM) 0); |
0e0dced5 | 1470 | } |
5e0944c6 | 1471 | #endif /* HAVE_NTGUI */ |
0e0dced5 | 1472 | |
636b507b DN |
1473 | /* Start the emacs daemon and try to connect to it. */ |
1474 | ||
b23b5a5b | 1475 | static void |
636b507b DN |
1476 | start_daemon_and_retry_set_socket (void) |
1477 | { | |
802bdb3c | 1478 | #ifndef WINDOWSNT |
636b507b DN |
1479 | pid_t dpid; |
1480 | int status; | |
636b507b DN |
1481 | |
1482 | dpid = fork (); | |
1483 | ||
1484 | if (dpid > 0) | |
1485 | { | |
fd95644b DN |
1486 | pid_t w; |
1487 | w = waitpid (dpid, &status, WUNTRACED | WCONTINUED); | |
636b507b | 1488 | |
361358ea | 1489 | if ((w == -1) || !WIFEXITED (status) || WEXITSTATUS (status)) |
fd95644b DN |
1490 | { |
1491 | message (TRUE, "Error: Could not start the Emacs daemon\n"); | |
1492 | exit (EXIT_FAILURE); | |
1493 | } | |
1494 | ||
1495 | /* Try connecting, the daemon should have started by now. */ | |
1496 | message (TRUE, "Emacs daemon should have started, trying to connect again\n"); | |
636b507b | 1497 | if ((emacs_socket = set_socket (1)) == INVALID_SOCKET) |
fd95644b DN |
1498 | { |
1499 | message (TRUE, "Error: Cannot connect even after starting the Emacs daemon\n"); | |
1500 | exit (EXIT_FAILURE); | |
1501 | } | |
636b507b DN |
1502 | } |
1503 | else if (dpid < 0) | |
1504 | { | |
fd95644b | 1505 | fprintf (stderr, "Error: Cannot fork!\n"); |
6ab88e02 | 1506 | exit (EXIT_FAILURE); |
636b507b DN |
1507 | } |
1508 | else | |
1509 | { | |
988e88ab | 1510 | char emacs[] = "emacs"; |
b0bbc07d PE |
1511 | char daemon_option[] = "--daemon"; |
1512 | char *d_argv[] = {emacs, daemon_option, 0 }; | |
636b507b DN |
1513 | if (socket_name != NULL) |
1514 | { | |
1515 | /* Pass --daemon=socket_name as argument. */ | |
988e88ab | 1516 | const char *deq = "--daemon="; |
17107bb6 PE |
1517 | char *daemon_arg = xmalloc (strlen (deq) |
1518 | + strlen (socket_name) + 1); | |
636b507b DN |
1519 | strcpy (daemon_arg, deq); |
1520 | strcat (daemon_arg, socket_name); | |
1521 | d_argv[1] = daemon_arg; | |
1522 | } | |
1523 | execvp ("emacs", d_argv); | |
1524 | message (TRUE, "%s: error starting emacs daemon\n", progname); | |
1525 | } | |
802bdb3c | 1526 | #endif /* WINDOWSNT */ |
636b507b DN |
1527 | } |
1528 | ||
aa0b6932 | 1529 | int |
873fbd0b | 1530 | main (int argc, char **argv) |
aa0b6932 | 1531 | { |
c5443aa5 | 1532 | int rl = 0, needlf = 0; |
974b73e8 | 1533 | char *cwd, *str; |
aa0b6932 | 1534 | char string[BUFSIZ+1]; |
4be3dfc5 | 1535 | int start_daemon_if_needed; |
3ecb8d93 | 1536 | int exit_status = EXIT_SUCCESS; |
aa0b6932 | 1537 | |
974b73e8 | 1538 | main_argv = argv; |
aa0b6932 JB |
1539 | progname = argv[0]; |
1540 | ||
5e0944c6 | 1541 | #ifdef HAVE_NTGUI |
6b59694e DC |
1542 | /* On Windows 7 and later, we need to explicitly associate |
1543 | emacsclient with emacs so the UI behaves sensibly. This | |
1544 | association does no harm if we're not actually connecting to an | |
1545 | Emacs using a window display. */ | |
ff90fbde | 1546 | w32_set_user_model_id (); |
5e0944c6 | 1547 | #endif /* HAVE_NTGUI */ |
ff90fbde | 1548 | |
aa0b6932 JB |
1549 | /* Process options. */ |
1550 | decode_options (argc, argv); | |
1551 | ||
273b9028 | 1552 | if ((argc - optind < 1) && !eval && current_frame) |
23a7488d | 1553 | { |
974b73e8 KL |
1554 | message (TRUE, "%s: file name or argument required\n" |
1555 | "Try `%s --help' for more information\n", | |
1556 | progname, progname); | |
aa0b6932 | 1557 | exit (EXIT_FAILURE); |
23a7488d RS |
1558 | } |
1559 | ||
636b507b DN |
1560 | /* If alternate_editor is the empty string, start the emacs daemon |
1561 | in case of failure to connect. */ | |
1562 | start_daemon_if_needed = (alternate_editor | |
1563 | && (alternate_editor[0] == '\0')); | |
aa0b6932 | 1564 | |
7e6bb4c9 PE |
1565 | emacs_socket = set_socket (alternate_editor || start_daemon_if_needed); |
1566 | if (emacs_socket == INVALID_SOCKET) | |
1567 | { | |
1568 | if (! start_daemon_if_needed) | |
1569 | fail (); | |
1570 | ||
7e6bb4c9 PE |
1571 | start_daemon_and_retry_set_socket (); |
1572 | } | |
974b73e8 KL |
1573 | |
1574 | cwd = get_current_dir_name (); | |
46cec291 RS |
1575 | if (cwd == 0) |
1576 | { | |
974b73e8 KL |
1577 | message (TRUE, "%s: %s\n", progname, |
1578 | "Cannot get current working directory"); | |
819b8f00 | 1579 | fail (); |
46cec291 RS |
1580 | } |
1581 | ||
5e0944c6 | 1582 | #ifdef HAVE_NTGUI |
efc3dd3c | 1583 | if (display && !strcmp (display, "w32")) |
0e0dced5 | 1584 | w32_give_focus (); |
5e0944c6 | 1585 | #endif /* HAVE_NTGUI */ |
c66648e0 | 1586 | |
273b9028 | 1587 | /* Send over our environment and current directory. */ |
59e085e0 KL |
1588 | if (!current_frame) |
1589 | { | |
59e085e0 KL |
1590 | int i; |
1591 | for (i = 0; environ[i]; i++) | |
1592 | { | |
486ba65f JR |
1593 | send_to_emacs (emacs_socket, "-env "); |
1594 | quote_argument (emacs_socket, environ[i]); | |
1595 | send_to_emacs (emacs_socket, " "); | |
59e085e0 | 1596 | } |
2828d5f9 | 1597 | } |
ba528748 SM |
1598 | send_to_emacs (emacs_socket, "-dir "); |
1599 | quote_argument (emacs_socket, cwd); | |
1600 | send_to_emacs (emacs_socket, "/"); | |
1601 | send_to_emacs (emacs_socket, " "); | |
2828d5f9 | 1602 | |
6afdd335 | 1603 | retry: |
5212210c | 1604 | if (nowait) |
486ba65f | 1605 | send_to_emacs (emacs_socket, "-nowait "); |
292d74a3 | 1606 | |
92071250 | 1607 | if (current_frame) |
486ba65f | 1608 | send_to_emacs (emacs_socket, "-current-frame "); |
c0f342ab | 1609 | |
30be2360 | 1610 | if (display) |
87209357 | 1611 | { |
486ba65f JR |
1612 | send_to_emacs (emacs_socket, "-display "); |
1613 | quote_argument (emacs_socket, display); | |
1614 | send_to_emacs (emacs_socket, " "); | |
87209357 | 1615 | } |
30be2360 | 1616 | |
0191e222 CY |
1617 | if (parent_id) |
1618 | { | |
1619 | send_to_emacs (emacs_socket, "-parent-id "); | |
1620 | quote_argument (emacs_socket, parent_id); | |
1621 | send_to_emacs (emacs_socket, " "); | |
1622 | } | |
1623 | ||
18a4ce5e AR |
1624 | if (frame_parameters && !current_frame) |
1625 | { | |
1626 | send_to_emacs (emacs_socket, "-frame-parameters "); | |
1627 | quote_argument (emacs_socket, frame_parameters); | |
1628 | send_to_emacs (emacs_socket, " "); | |
1629 | } | |
1630 | ||
2d0e8e61 CY |
1631 | /* Unless we are certain we don't want to occupy the tty, send our |
1632 | tty information to Emacs. For example, in daemon mode Emacs may | |
1633 | need to occupy this tty if no other frame is available. */ | |
1634 | if (!current_frame || !eval) | |
9628b887 | 1635 | { |
b9170155 | 1636 | const char *tty_type, *tty_name; |
0b0d3e0b | 1637 | |
273b9028 CY |
1638 | if (find_tty (&tty_type, &tty_name, !tty)) |
1639 | { | |
b2ff54a0 | 1640 | #if !defined (NO_SOCKETS_IN_FILE_SYSTEM) |
273b9028 | 1641 | init_signals (); |
b2ff54a0 | 1642 | #endif |
273b9028 CY |
1643 | send_to_emacs (emacs_socket, "-tty "); |
1644 | quote_argument (emacs_socket, tty_name); | |
1645 | send_to_emacs (emacs_socket, " "); | |
1646 | quote_argument (emacs_socket, tty_type); | |
1647 | send_to_emacs (emacs_socket, " "); | |
1648 | } | |
9628b887 | 1649 | } |
77134727 | 1650 | |
273b9028 | 1651 | if (!current_frame && !tty) |
486ba65f | 1652 | send_to_emacs (emacs_socket, "-window-system "); |
0b0d3e0b | 1653 | |
87209357 | 1654 | if ((argc - optind > 0)) |
5212210c | 1655 | { |
b0bbc07d | 1656 | int i; |
87209357 | 1657 | for (i = optind; i < argc; i++) |
46cec291 | 1658 | { |
0b0d3e0b | 1659 | |
87209357 | 1660 | if (eval) |
0b0d3e0b | 1661 | { |
974b73e8 | 1662 | /* Don't prepend cwd or anything like that. */ |
486ba65f JR |
1663 | send_to_emacs (emacs_socket, "-eval "); |
1664 | quote_argument (emacs_socket, argv[i]); | |
1665 | send_to_emacs (emacs_socket, " "); | |
0b0d3e0b KL |
1666 | continue; |
1667 | } | |
1668 | ||
1669 | if (*argv[i] == '+') | |
1670 | { | |
87209357 EZ |
1671 | char *p = argv[i] + 1; |
1672 | while (isdigit ((unsigned char) *p) || *p == ':') p++; | |
0b0d3e0b KL |
1673 | if (*p == 0) |
1674 | { | |
486ba65f JR |
1675 | send_to_emacs (emacs_socket, "-position "); |
1676 | quote_argument (emacs_socket, argv[i]); | |
1677 | send_to_emacs (emacs_socket, " "); | |
0b0d3e0b KL |
1678 | continue; |
1679 | } | |
0b0d3e0b | 1680 | } |
6cde1b21 JB |
1681 | #ifdef WINDOWSNT |
1682 | else if (! file_name_absolute_p (argv[i]) | |
1683 | && (isalpha (argv[i][0]) && argv[i][1] == ':')) | |
1684 | /* Windows can have a different default directory for each | |
1685 | drive, so the cwd passed via "-dir" is not sufficient | |
1686 | to account for that. | |
1687 | If the user uses <drive>:<relpath>, we hence need to be | |
1688 | careful to expand <relpath> with the default directory | |
1689 | corresponding to <drive>. */ | |
1690 | { | |
1691 | char *filename = (char *) xmalloc (MAX_PATH); | |
1692 | DWORD size; | |
1693 | ||
1694 | size = GetFullPathName (argv[i], MAX_PATH, filename, NULL); | |
1695 | if (size > 0 && size < MAX_PATH) | |
1696 | argv[i] = filename; | |
1697 | else | |
1698 | free (filename); | |
1699 | } | |
1700 | #endif | |
0b0d3e0b | 1701 | |
486ba65f | 1702 | send_to_emacs (emacs_socket, "-file "); |
486ba65f JR |
1703 | quote_argument (emacs_socket, argv[i]); |
1704 | send_to_emacs (emacs_socket, " "); | |
0b0d3e0b | 1705 | } |
46cec291 | 1706 | } |
273b9028 | 1707 | else if (eval) |
87209357 | 1708 | { |
273b9028 CY |
1709 | /* Read expressions interactively. */ |
1710 | while ((str = fgets (string, BUFSIZ, stdin))) | |
1711 | { | |
1712 | send_to_emacs (emacs_socket, "-eval "); | |
1713 | quote_argument (emacs_socket, str); | |
1714 | } | |
1715 | send_to_emacs (emacs_socket, " "); | |
87209357 | 1716 | } |
0b0d3e0b | 1717 | |
486ba65f | 1718 | send_to_emacs (emacs_socket, "\n"); |
46cec291 | 1719 | |
fc2040c0 | 1720 | /* Wait for an answer. */ |
0b973fc5 | 1721 | if (!eval && !tty && !nowait && !quiet) |
30be2360 SM |
1722 | { |
1723 | printf ("Waiting for Emacs..."); | |
1724 | needlf = 2; | |
1725 | } | |
46cec291 | 1726 | fflush (stdout); |
0b0d3e0b | 1727 | fsync (1); |
46cec291 | 1728 | |
3cf8c6aa | 1729 | /* Now, wait for an answer and print any messages. */ |
b166dcd8 | 1730 | while (exit_status == EXIT_SUCCESS) |
3cf8c6aa | 1731 | { |
2b84f674 | 1732 | char *p, *end_p; |
b166dcd8 KC |
1733 | do |
1734 | { | |
1735 | errno = 0; | |
1736 | rl = recv (emacs_socket, string, BUFSIZ, 0); | |
1737 | } | |
1738 | /* If we receive a signal (e.g. SIGWINCH, which we pass | |
1739 | through to Emacs), on some OSes we get EINTR and must retry. */ | |
1740 | while (rl < 0 && errno == EINTR); | |
1741 | ||
1742 | if (rl <= 0) | |
1743 | break; | |
b23b5a5b | 1744 | |
974b73e8 KL |
1745 | string[rl] = '\0'; |
1746 | ||
2b84f674 AS |
1747 | /* Loop over all NL-terminated messages. */ |
1748 | for (end_p = p = string; end_p != NULL && *end_p != '\0'; p = end_p) | |
1749 | { | |
1750 | end_p = strchr (p, '\n'); | |
1751 | if (end_p != NULL) | |
1752 | *end_p++ = '\0'; | |
0b0d3e0b | 1753 | |
6b59694e DC |
1754 | if (strprefix ("-emacs-pid ", p)) |
1755 | { | |
1756 | /* -emacs-pid PID: The process id of the Emacs process. */ | |
1757 | emacs_pid = strtol (p + strlen ("-emacs-pid"), NULL, 10); | |
1758 | } | |
1759 | else if (strprefix ("-window-system-unsupported ", p)) | |
1760 | { | |
1761 | /* -window-system-unsupported: Emacs was compiled without support | |
1762 | for whatever window system we tried. Try the alternate | |
1763 | display, or, failing that, try the terminal. */ | |
1764 | if (alt_display) | |
1765 | { | |
1766 | display = alt_display; | |
1767 | alt_display = NULL; | |
1768 | } | |
1769 | else | |
1770 | { | |
1771 | nowait = 0; | |
1772 | tty = 1; | |
1773 | } | |
1774 | ||
1775 | goto retry; | |
1776 | } | |
1777 | else if (strprefix ("-print ", p)) | |
1778 | { | |
1779 | /* -print STRING: Print STRING on the terminal. */ | |
1780 | str = unquote_argument (p + strlen ("-print ")); | |
1781 | if (needlf) | |
1782 | printf ("\n"); | |
1783 | printf ("%s", str); | |
1784 | needlf = str[0] == '\0' ? needlf : str[strlen (str) - 1] != '\n'; | |
1785 | } | |
1786 | else if (strprefix ("-print-nonl ", p)) | |
1787 | { | |
1788 | /* -print-nonl STRING: Print STRING on the terminal. | |
1789 | Used to continue a preceding -print command. */ | |
1790 | str = unquote_argument (p + strlen ("-print-nonl ")); | |
1791 | printf ("%s", str); | |
1792 | needlf = str[0] == '\0' ? needlf : str[strlen (str) - 1] != '\n'; | |
1793 | } | |
1794 | else if (strprefix ("-error ", p)) | |
1795 | { | |
1796 | /* -error DESCRIPTION: Signal an error on the terminal. */ | |
1797 | str = unquote_argument (p + strlen ("-error ")); | |
1798 | if (needlf) | |
1799 | printf ("\n"); | |
1800 | fprintf (stderr, "*ERROR*: %s", str); | |
1801 | needlf = str[0] == '\0' ? needlf : str[strlen (str) - 1] != '\n'; | |
1802 | exit_status = EXIT_FAILURE; | |
1803 | } | |
c801ad51 | 1804 | #ifdef SIGSTOP |
2b84f674 AS |
1805 | else if (strprefix ("-suspend ", p)) |
1806 | { | |
1807 | /* -suspend: Suspend this terminal, i.e., stop the process. */ | |
1808 | if (needlf) | |
1809 | printf ("\n"); | |
1810 | needlf = 0; | |
1811 | kill (0, SIGSTOP); | |
1812 | } | |
b2ff54a0 | 1813 | #endif |
2b84f674 AS |
1814 | else |
1815 | { | |
1816 | /* Unknown command. */ | |
1817 | if (needlf) | |
1818 | printf ("\n"); | |
1819 | needlf = 0; | |
1820 | printf ("*ERROR*: Unknown message: %s\n", p); | |
1821 | } | |
1822 | } | |
3cf8c6aa SM |
1823 | } |
1824 | ||
1825 | if (needlf) | |
1826 | printf ("\n"); | |
1827 | fflush (stdout); | |
0b0d3e0b | 1828 | fsync (1); |
23a7488d | 1829 | |
3ecb8d93 WS |
1830 | if (rl < 0) |
1831 | exit_status = EXIT_FAILURE; | |
1832 | ||
4b7b77f6 | 1833 | CLOSE_SOCKET (emacs_socket); |
3ecb8d93 | 1834 | return exit_status; |
46cec291 RS |
1835 | } |
1836 | ||
1e7823d0 | 1837 | #endif /* HAVE_SOCKETS && HAVE_INET_SOCKETS */ |