Commit | Line | Data |
---|---|---|
efb859b4 | 1 | /* Client process that communicates with GNU Emacs acting as server. |
9374581a | 2 | |
ba318903 | 3 | Copyright (C) 1986-1987, 1994, 1999-2014 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 | ||
bc558f3e JB |
106 | /* Additional space when allocating buffers for filenames, etc. */ |
107 | #define EXTRA_SPACE 100 | |
108 | ||
069a7756 JB |
109 | #ifdef min |
110 | #undef min | |
111 | #endif | |
1e6f32f8 JM |
112 | #define min(x, y) (((x) < (y)) ? (x) : (y)) |
113 | ||
aa0b6932 | 114 | \f |
8f9aaa0a | 115 | /* Name used to invoke this program. */ |
728a982d | 116 | const char *progname; |
8f9aaa0a | 117 | |
0a125897 KL |
118 | /* The second argument to main. */ |
119 | char **main_argv; | |
120 | ||
749ae770 | 121 | /* Nonzero means don't wait for a response from Emacs. --no-wait. */ |
8f9aaa0a RS |
122 | int nowait = 0; |
123 | ||
0b973fc5 DW |
124 | /* Nonzero means don't print messages for successful operations. --quiet. */ |
125 | int quiet = 0; | |
126 | ||
30be2360 SM |
127 | /* Nonzero means args are expressions to be evaluated. --eval. */ |
128 | int eval = 0; | |
129 | ||
31fa6595 SM |
130 | /* Nonzero means don't open a new frame. Inverse of --create-frame. */ |
131 | int current_frame = 1; | |
92071250 | 132 | |
30be2360 | 133 | /* The display on which Emacs should work. --display. */ |
988e88ab | 134 | const char *display = NULL; |
30be2360 | 135 | |
6b59694e DC |
136 | /* The alternate display we should try if Emacs does not support display. */ |
137 | const char *alt_display = NULL; | |
138 | ||
0191e222 CY |
139 | /* The parent window ID, if we are opening a frame via XEmbed. */ |
140 | char *parent_id = NULL; | |
141 | ||
9628b887 | 142 | /* Nonzero means open a new Emacs frame on the current terminal. */ |
77134727 | 143 | int tty = 0; |
9628b887 | 144 | |
30be2360 SM |
145 | /* If non-NULL, the name of an editor to fallback to if the server |
146 | is not running. --alternate-editor. */ | |
b03d27bd | 147 | const char *alternate_editor = NULL; |
30be2360 | 148 | |
3db926be | 149 | /* If non-NULL, the filename of the UNIX socket. */ |
6b0c8984 | 150 | const char *socket_name = NULL; |
254107e4 | 151 | |
aa0b6932 | 152 | /* If non-NULL, the filename of the authentication file. */ |
988e88ab | 153 | const char *server_file = NULL; |
aa0b6932 | 154 | |
c66648e0 JB |
155 | /* PID of the Emacs server process. */ |
156 | int emacs_pid = 0; | |
157 | ||
18a4ce5e AR |
158 | /* If non-NULL, a string that should form a frame parameter alist to |
159 | be used for the new frame */ | |
160 | const char *frame_parameters = NULL; | |
161 | ||
845ca893 | 162 | static _Noreturn void print_help_and_exit (void); |
68441b90 | 163 | |
7f3bff3e | 164 | |
8f9aaa0a RS |
165 | struct option longopts[] = |
166 | { | |
749ae770 | 167 | { "no-wait", no_argument, NULL, 'n' }, |
0b973fc5 | 168 | { "quiet", no_argument, NULL, 'q' }, |
30be2360 | 169 | { "eval", no_argument, NULL, 'e' }, |
8f9aaa0a RS |
170 | { "help", no_argument, NULL, 'H' }, |
171 | { "version", no_argument, NULL, 'V' }, | |
b28c910d | 172 | { "tty", no_argument, NULL, 't' }, |
dc1cd5f7 | 173 | { "nw", no_argument, NULL, 't' }, |
31fa6595 | 174 | { "create-frame", no_argument, NULL, 'c' }, |
3cf8c6aa | 175 | { "alternate-editor", required_argument, NULL, 'a' }, |
18a4ce5e | 176 | { "frame-parameters", required_argument, NULL, 'F' }, |
b03d27bd | 177 | #ifndef NO_SOCKETS_IN_FILE_SYSTEM |
254107e4 | 178 | { "socket-name", required_argument, NULL, 's' }, |
b03d27bd | 179 | #endif |
aa0b6932 | 180 | { "server-file", required_argument, NULL, 'f' }, |
30be2360 | 181 | { "display", required_argument, NULL, 'd' }, |
0191e222 | 182 | { "parent-id", required_argument, NULL, 'p' }, |
30be2360 | 183 | { 0, 0, 0, 0 } |
8f9aaa0a RS |
184 | }; |
185 | ||
974b73e8 KL |
186 | \f |
187 | /* Like malloc but get fatal error if memory is exhausted. */ | |
188 | ||
17107bb6 PE |
189 | static void * |
190 | xmalloc (size_t size) | |
974b73e8 | 191 | { |
17107bb6 | 192 | void *result = malloc (size); |
974b73e8 KL |
193 | if (result == NULL) |
194 | { | |
195 | perror ("malloc"); | |
196 | exit (EXIT_FAILURE); | |
197 | } | |
198 | return result; | |
199 | } | |
200 | ||
974b73e8 KL |
201 | /* From sysdep.c */ |
202 | #if !defined (HAVE_GET_CURRENT_DIR_NAME) || defined (BROKEN_GET_CURRENT_DIR_NAME) | |
203 | ||
c5443aa5 | 204 | char *get_current_dir_name (void); |
cb06b8dc | 205 | |
974b73e8 | 206 | /* Return the current working directory. Returns NULL on errors. |
5ab73228 | 207 | Any other returned value must be freed with free. This is used |
974b73e8 KL |
208 | only when get_current_dir_name is not defined on the system. */ |
209 | char* | |
7c3320d8 | 210 | get_current_dir_name (void) |
974b73e8 KL |
211 | { |
212 | char *buf; | |
b9170155 | 213 | const char *pwd; |
974b73e8 | 214 | struct stat dotstat, pwdstat; |
9239d970 | 215 | /* If PWD is accurate, use it instead of calling getcwd. PWD is |
974b73e8 KL |
216 | sometimes a nicer name, and using it may avoid a fatal error if a |
217 | parent directory is searchable but not readable. */ | |
7ce8671d | 218 | if ((pwd = egetenv ("PWD")) != 0 |
974b73e8 KL |
219 | && (IS_DIRECTORY_SEP (*pwd) || (*pwd && IS_DEVICE_SEP (pwd[1]))) |
220 | && stat (pwd, &pwdstat) == 0 | |
221 | && stat (".", &dotstat) == 0 | |
222 | && dotstat.st_ino == pwdstat.st_ino | |
223 | && dotstat.st_dev == pwdstat.st_dev | |
224 | #ifdef MAXPATHLEN | |
225 | && strlen (pwd) < MAXPATHLEN | |
226 | #endif | |
227 | ) | |
228 | { | |
229 | buf = (char *) xmalloc (strlen (pwd) + 1); | |
974b73e8 KL |
230 | strcpy (buf, pwd); |
231 | } | |
974b73e8 KL |
232 | else |
233 | { | |
234 | size_t buf_size = 1024; | |
974b73e8 KL |
235 | for (;;) |
236 | { | |
17107bb6 PE |
237 | int tmp_errno; |
238 | buf = malloc (buf_size); | |
239 | if (! buf) | |
240 | break; | |
974b73e8 KL |
241 | if (getcwd (buf, buf_size) == buf) |
242 | break; | |
17107bb6 PE |
243 | tmp_errno = errno; |
244 | free (buf); | |
245 | if (tmp_errno != ERANGE) | |
974b73e8 | 246 | { |
974b73e8 KL |
247 | errno = tmp_errno; |
248 | return NULL; | |
249 | } | |
250 | buf_size *= 2; | |
17107bb6 PE |
251 | if (! buf_size) |
252 | { | |
253 | errno = ENOMEM; | |
254 | return NULL; | |
255 | } | |
974b73e8 KL |
256 | } |
257 | } | |
974b73e8 KL |
258 | return buf; |
259 | } | |
260 | #endif | |
261 | ||
42073bfb | 262 | #ifdef WINDOWSNT |
7ce8671d | 263 | |
a54af40e EZ |
264 | /* Like strdup but get a fatal error if memory is exhausted. */ |
265 | ||
266 | char * | |
267 | xstrdup (const char *s) | |
268 | { | |
269 | char *result = strdup (s); | |
270 | if (result == NULL) | |
271 | { | |
272 | perror ("strdup"); | |
273 | exit (EXIT_FAILURE); | |
274 | } | |
275 | return result; | |
276 | } | |
277 | ||
7ce8671d JB |
278 | #define REG_ROOT "SOFTWARE\\GNU\\Emacs" |
279 | ||
280 | /* Retrieve an environment variable from the Emacs subkeys of the registry. | |
281 | Return NULL if the variable was not found, or it was empty. | |
282 | This code is based on w32_get_resource (w32.c). */ | |
283 | char * | |
7c3320d8 | 284 | w32_get_resource (HKEY predefined, char *key, LPDWORD type) |
7ce8671d JB |
285 | { |
286 | HKEY hrootkey = NULL; | |
287 | char *result = NULL; | |
288 | DWORD cbData; | |
289 | ||
290 | if (RegOpenKeyEx (predefined, REG_ROOT, 0, KEY_READ, &hrootkey) == ERROR_SUCCESS) | |
291 | { | |
292 | if (RegQueryValueEx (hrootkey, key, NULL, NULL, NULL, &cbData) == ERROR_SUCCESS) | |
293 | { | |
294 | result = (char *) xmalloc (cbData); | |
295 | ||
bc558f3e JB |
296 | if ((RegQueryValueEx (hrootkey, key, NULL, type, result, &cbData) != ERROR_SUCCESS) |
297 | || (*result == 0)) | |
7ce8671d JB |
298 | { |
299 | free (result); | |
300 | result = NULL; | |
301 | } | |
302 | } | |
303 | ||
304 | RegCloseKey (hrootkey); | |
305 | } | |
306 | ||
307 | return result; | |
308 | } | |
309 | ||
310 | /* | |
311 | getenv wrapper for Windows | |
312 | ||
a54af40e EZ |
313 | Value is allocated on the heap, and can be free'd. |
314 | ||
315 | This is needed to duplicate Emacs's behavior, which is to look for | |
316 | environment variables in the registry if they don't appear in the | |
317 | environment. */ | |
7ce8671d | 318 | char * |
7c3320d8 | 319 | w32_getenv (char *envvar) |
7ce8671d JB |
320 | { |
321 | char *value; | |
322 | DWORD dwType; | |
323 | ||
657d08d3 | 324 | if ((value = getenv (envvar))) |
a54af40e EZ |
325 | /* Found in the environment. strdup it, because values returned |
326 | by getenv cannot be free'd. */ | |
327 | return xstrdup (value); | |
7ce8671d JB |
328 | |
329 | if (! (value = w32_get_resource (HKEY_CURRENT_USER, envvar, &dwType)) && | |
330 | ! (value = w32_get_resource (HKEY_LOCAL_MACHINE, envvar, &dwType))) | |
d41784ee EZ |
331 | { |
332 | /* "w32console" is what Emacs on Windows uses for tty-type under -nw. */ | |
333 | if (strcmp (envvar, "TERM") == 0) | |
a54af40e | 334 | return xstrdup ("w32console"); |
d41784ee EZ |
335 | /* Found neither in the environment nor in the registry. */ |
336 | return NULL; | |
337 | } | |
7ce8671d JB |
338 | |
339 | if (dwType == REG_SZ) | |
340 | /* Registry; no need to expand. */ | |
341 | return value; | |
342 | ||
343 | if (dwType == REG_EXPAND_SZ) | |
344 | { | |
345 | DWORD size; | |
346 | ||
657d08d3 | 347 | if ((size = ExpandEnvironmentStrings (value, NULL, 0))) |
7ce8671d JB |
348 | { |
349 | char *buffer = (char *) xmalloc (size); | |
350 | if (ExpandEnvironmentStrings (value, buffer, size)) | |
351 | { | |
352 | /* Found and expanded. */ | |
353 | free (value); | |
354 | return buffer; | |
355 | } | |
356 | ||
357 | /* Error expanding. */ | |
358 | free (buffer); | |
359 | } | |
360 | } | |
361 | ||
362 | /* Not the right type, or not correctly expanded. */ | |
363 | free (value); | |
364 | return NULL; | |
365 | } | |
366 | ||
ff90fbde | 367 | |
42073bfb | 368 | int |
7c3320d8 | 369 | w32_window_app (void) |
42073bfb JB |
370 | { |
371 | static int window_app = -1; | |
372 | char szTitle[MAX_PATH]; | |
373 | ||
374 | if (window_app < 0) | |
dbf60b07 JR |
375 | { |
376 | /* Checking for STDOUT does not work; it's a valid handle also in | |
377 | nonconsole apps. Testing for the console title seems to work. */ | |
378 | window_app = (GetConsoleTitleA (szTitle, MAX_PATH) == 0); | |
379 | if (window_app) | |
361358ea | 380 | InitCommonControls (); |
dbf60b07 | 381 | } |
42073bfb JB |
382 | |
383 | return window_app; | |
384 | } | |
105faa84 | 385 | |
79432772 | 386 | /* execvp wrapper for Windows. Quotes arguments with embedded spaces. |
105faa84 DN |
387 | |
388 | This is necessary due to the broken implementation of exec* routines in | |
389 | the Microsoft libraries: they concatenate the arguments together without | |
390 | quoting special characters, and pass the result to CreateProcess, with | |
7c3320d8 | 391 | predictably bad results. By contrast, POSIX execvp passes the arguments |
79432772 JB |
392 | directly into the argv array of the child process. */ |
393 | ||
105faa84 | 394 | int |
7c3320d8 | 395 | w32_execvp (const char *path, char **argv) |
105faa84 DN |
396 | { |
397 | int i; | |
ad0a19b7 | 398 | extern int execvp (const char*, char **); |
105faa84 DN |
399 | |
400 | /* Required to allow a .BAT script as alternate editor. */ | |
401 | argv[0] = (char *) alternate_editor; | |
402 | ||
403 | for (i = 0; argv[i]; i++) | |
404 | if (strchr (argv[i], ' ')) | |
405 | { | |
406 | char *quoted = alloca (strlen (argv[i]) + 3); | |
407 | sprintf (quoted, "\"%s\"", argv[i]); | |
408 | argv[i] = quoted; | |
409 | } | |
410 | ||
411 | return execvp (path, argv); | |
412 | } | |
413 | ||
414 | #undef execvp | |
415 | #define execvp w32_execvp | |
416 | ||
d41784ee EZ |
417 | /* Emulation of ttyname for Windows. */ |
418 | char * | |
419 | ttyname (int fd) | |
420 | { | |
421 | return "CONOUT$"; | |
422 | } | |
423 | ||
105faa84 | 424 | #endif /* WINDOWSNT */ |
42073bfb | 425 | |
f387c1ee JB |
426 | /* Display a normal or error message. |
427 | On Windows, use a message box if compiled as a Windows app. */ | |
96c06863 | 428 | static void message (bool, const char *, ...) ATTRIBUTE_FORMAT_PRINTF (2, 3); |
b23b5a5b | 429 | static void |
96c06863 | 430 | message (bool is_error, const char *format, ...) |
42073bfb | 431 | { |
42073bfb JB |
432 | va_list args; |
433 | ||
b0bbc07d | 434 | va_start (args, format); |
42073bfb JB |
435 | |
436 | #ifdef WINDOWSNT | |
437 | if (w32_window_app ()) | |
438 | { | |
17107bb6 PE |
439 | char msg[2048]; |
440 | vsnprintf (msg, sizeof msg, format, args); | |
441 | msg[sizeof msg - 1] = '\0'; | |
442 | ||
42073bfb JB |
443 | if (is_error) |
444 | MessageBox (NULL, msg, "Emacsclient ERROR", MB_ICONERROR); | |
445 | else | |
446 | MessageBox (NULL, msg, "Emacsclient", MB_ICONINFORMATION); | |
447 | } | |
448 | else | |
449 | #endif | |
9219db75 JB |
450 | { |
451 | FILE *f = is_error ? stderr : stdout; | |
452 | ||
17107bb6 | 453 | vfprintf (f, format, args); |
9219db75 JB |
454 | fflush (f); |
455 | } | |
17107bb6 PE |
456 | |
457 | va_end (args); | |
42073bfb JB |
458 | } |
459 | ||
8f9aaa0a | 460 | /* Decode the options from argv and argc. |
5212210c | 461 | The global variable `optind' will say how many arguments we used up. */ |
8f9aaa0a | 462 | |
b23b5a5b | 463 | static void |
873fbd0b | 464 | decode_options (int argc, char **argv) |
8f9aaa0a | 465 | { |
7ce8671d | 466 | alternate_editor = egetenv ("ALTERNATE_EDITOR"); |
0ea5797a | 467 | |
8f9aaa0a RS |
468 | while (1) |
469 | { | |
dc1cd5f7 | 470 | int opt = getopt_long_only (argc, argv, |
b03d27bd | 471 | #ifndef NO_SOCKETS_IN_FILE_SYSTEM |
3794a2d3 | 472 | "VHneqa:s:f:d:F:tc", |
b03d27bd | 473 | #else |
3794a2d3 | 474 | "VHneqa:f:d:F:tc", |
b03d27bd | 475 | #endif |
974b73e8 | 476 | longopts, 0); |
8f9aaa0a RS |
477 | |
478 | if (opt == EOF) | |
479 | break; | |
480 | ||
481 | switch (opt) | |
482 | { | |
483 | case 0: | |
484 | /* If getopt returns 0, then it has already processed a | |
485 | long-named option. We should do nothing. */ | |
486 | break; | |
e69233c2 | 487 | |
97e3214d GM |
488 | case 'a': |
489 | alternate_editor = optarg; | |
490 | break; | |
e69233c2 | 491 | |
b03d27bd | 492 | #ifndef NO_SOCKETS_IN_FILE_SYSTEM |
254107e4 RS |
493 | case 's': |
494 | socket_name = optarg; | |
495 | break; | |
b03d27bd | 496 | #endif |
254107e4 | 497 | |
aa0b6932 JB |
498 | case 'f': |
499 | server_file = optarg; | |
500 | break; | |
254107e4 | 501 | |
0ea5797a SM |
502 | /* We used to disallow this argument in w32, but it seems better |
503 | to allow it, for the occasional case where the user is | |
504 | connecting with a w32 client to a server compiled with X11 | |
505 | support. */ | |
30be2360 SM |
506 | case 'd': |
507 | display = optarg; | |
508 | break; | |
509 | ||
8f9aaa0a RS |
510 | case 'n': |
511 | nowait = 1; | |
512 | break; | |
513 | ||
30be2360 SM |
514 | case 'e': |
515 | eval = 1; | |
516 | break; | |
517 | ||
0b973fc5 DW |
518 | case 'q': |
519 | quiet = 1; | |
520 | break; | |
521 | ||
8f9aaa0a | 522 | case 'V': |
96c06863 | 523 | message (false, "emacsclient %s\n", VERSION); |
65396510 | 524 | exit (EXIT_SUCCESS); |
8f9aaa0a | 525 | break; |
46cec291 | 526 | |
819b8f00 | 527 | case 't': |
77134727 | 528 | tty = 1; |
c1b8e896 | 529 | current_frame = 0; |
77134727 KL |
530 | break; |
531 | ||
e5299d8d | 532 | case 'c': |
31fa6595 | 533 | current_frame = 0; |
9628b887 | 534 | break; |
0b0d3e0b | 535 | |
0191e222 CY |
536 | case 'p': |
537 | parent_id = optarg; | |
538 | current_frame = 0; | |
539 | break; | |
540 | ||
8f9aaa0a | 541 | case 'H': |
8f9aaa0a | 542 | print_help_and_exit (); |
20c396e8 JB |
543 | break; |
544 | ||
18a4ce5e AR |
545 | case 'F': |
546 | frame_parameters = optarg; | |
547 | break; | |
548 | ||
20c396e8 | 549 | default: |
96c06863 | 550 | message (true, "Try `%s --help' for more information\n", progname); |
65396510 | 551 | exit (EXIT_FAILURE); |
20c396e8 | 552 | break; |
8f9aaa0a RS |
553 | } |
554 | } | |
9628b887 | 555 | |
273b9028 CY |
556 | /* If the -c option is used (without -t) and no --display argument |
557 | is provided, try $DISPLAY. | |
558 | Without the -c option, we used to set `display' to $DISPLAY by | |
559 | default, but this changed the default behavior and is sometimes | |
560 | inconvenient. So we force users to use "--display $DISPLAY" if | |
6b59694e DC |
561 | they want Emacs to connect to their current display. |
562 | ||
563 | Some window systems have a notion of default display not | |
564 | reflected in the DISPLAY variable. If the user didn't give us an | |
565 | explicit display, try this platform-specific after trying the | |
566 | display in DISPLAY (if any). */ | |
09317bf4 | 567 | if (!current_frame && !tty && !display) |
e7534fc4 | 568 | { |
6b59694e DC |
569 | /* Set these here so we use a default_display only when the user |
570 | didn't give us an explicit display. */ | |
571 | #if defined (NS_IMPL_COCOA) | |
572 | alt_display = "ns"; | |
573 | #elif defined (HAVE_NTGUI) | |
efc3dd3c | 574 | alt_display = "w32"; |
e7534fc4 | 575 | #endif |
6b59694e DC |
576 | |
577 | display = egetenv ("DISPLAY"); | |
578 | } | |
579 | ||
580 | if (!display) | |
581 | { | |
582 | display = alt_display; | |
583 | alt_display = NULL; | |
e7534fc4 | 584 | } |
9997dc15 | 585 | |
273b9028 | 586 | /* A null-string display is invalid. */ |
0ea5797a SM |
587 | if (display && strlen (display) == 0) |
588 | display = NULL; | |
589 | ||
273b9028 CY |
590 | /* If no display is available, new frames are tty frames. */ |
591 | if (!current_frame && !display) | |
92071250 | 592 | tty = 1; |
c0f342ab | 593 | |
802bdb3c | 594 | #ifdef WINDOWSNT |
9a864fa2 CY |
595 | /* Emacs on Windows does not support graphical and text terminal |
596 | frames in the same instance. So, treat the -t and -c options as | |
597 | equivalent, and open a new frame on the server's terminal. | |
598 | Ideally, we would only set tty = 1 when the serve is running in a | |
599 | console, but alas we don't know that. As a workaround, always | |
600 | ask for a tty frame, and let server.el figure it out. */ | |
601 | if (!current_frame) | |
602 | { | |
603 | display = NULL; | |
604 | tty = 1; | |
605 | } | |
606 | ||
69157c99 | 607 | if (alternate_editor && alternate_editor[0] == '\0') |
802bdb3c | 608 | { |
96c06863 | 609 | message (true, "--alternate-editor argument or ALTERNATE_EDITOR variable cannot be\n\ |
802bdb3c DN |
610 | an empty string"); |
611 | exit (EXIT_FAILURE); | |
612 | } | |
613 | #endif /* WINDOWSNT */ | |
8f9aaa0a RS |
614 | } |
615 | ||
974b73e8 | 616 | \f |
845ca893 | 617 | static _Noreturn void |
873fbd0b | 618 | print_help_and_exit (void) |
8f9aaa0a | 619 | { |
c0f342ab JB |
620 | /* Spaces and tabs are significant in this message; they're chosen so the |
621 | message aligns properly both in a tty and in a Windows message box. | |
622 | Please try to preserve them; otherwise the output is very hard to read | |
623 | when using emacsclientw. */ | |
96c06863 | 624 | message (false, |
29abe551 | 625 | "Usage: %s [OPTIONS] FILE...\n%s%s%s", progname, "\ |
30be2360 SM |
626 | Tell the Emacs server to visit the specified files.\n\ |
627 | Every FILE can be either just a FILENAME or [+LINE[:COLUMN]] FILENAME.\n\ | |
20c396e8 | 628 | \n\ |
30be2360 | 629 | The following OPTIONS are accepted:\n\ |
c0f342ab JB |
630 | -V, --version Just print version info and return\n\ |
631 | -H, --help Print this usage information message\n\ | |
dc1cd5f7 | 632 | -nw, -t, --tty Open a new Emacs frame on the current terminal\n\ |
c4b858e3 | 633 | -c, --create-frame Create a new frame instead of trying to\n\ |
9dfda22f | 634 | use the current Emacs frame\n\ |
29abe551 | 635 | ", "\ |
a150502a | 636 | -F ALIST, --frame-parameters=ALIST\n\ |
5f9388d0 | 637 | Set the parameters of a new frame\n\ |
c0f342ab | 638 | -e, --eval Evaluate the FILE arguments as ELisp expressions\n\ |
d07529f3 | 639 | -n, --no-wait Don't wait for the server to return\n\ |
0b973fc5 | 640 | -q, --quiet Don't display messages on success\n\ |
24d5010d | 641 | -d DISPLAY, --display=DISPLAY\n\ |
0191e222 | 642 | Visit the file in the given display\n\ |
29abe551 | 643 | ", "\ |
0191e222 | 644 | --parent-id=ID Open in parent window ID, via XEmbed\n" |
aa0b6932 | 645 | #ifndef NO_SOCKETS_IN_FILE_SYSTEM |
24d5010d | 646 | "-s SOCKET, --socket-name=SOCKET\n\ |
9dfda22f | 647 | Set filename of the UNIX socket for communication\n" |
aa0b6932 | 648 | #endif |
24d5010d | 649 | "-f SERVER, --server-file=SERVER\n\ |
9dfda22f | 650 | Set filename of the TCP authentication file\n\ |
24d5010d | 651 | -a EDITOR, --alternate-editor=EDITOR\n\ |
9dfda22f | 652 | Editor to fallback to if the server is not running\n" |
6133a1a9 | 653 | #ifndef WINDOWSNT |
c3f995a2 JB |
654 | " If EDITOR is the empty string, start Emacs in daemon\n\ |
655 | mode and try connecting again\n" | |
6133a1a9 | 656 | #endif /* not WINDOWSNT */ |
c3f995a2 | 657 | "\n\ |
29abe551 | 658 | Report bugs with M-x report-emacs-bug.\n"); |
65396510 | 659 | exit (EXIT_SUCCESS); |
8f9aaa0a | 660 | } |
5212210c | 661 | |
79432772 JB |
662 | /* Try to run a different command, or --if no alternate editor is |
663 | defined-- exit with an errorcode. | |
664 | Uses argv, but gets it from the global variable main_argv. */ | |
665 | ||
845ca893 | 666 | static _Noreturn void |
974b73e8 | 667 | fail (void) |
9002956f | 668 | { |
aa0b6932 | 669 | if (alternate_editor) |
9002956f | 670 | { |
aa0b6932 | 671 | int i = optind - 1; |
4472aef4 | 672 | |
974b73e8 | 673 | execvp (alternate_editor, main_argv + i); |
96c06863 | 674 | message (true, "%s: error executing alternate editor \"%s\"\n", |
974b73e8 | 675 | progname, alternate_editor); |
9002956f | 676 | } |
aa0b6932 | 677 | exit (EXIT_FAILURE); |
9002956f KL |
678 | } |
679 | ||
aa0b6932 | 680 | \f |
1e7823d0 | 681 | #if !defined (HAVE_SOCKETS) || !defined (HAVE_INET_SOCKETS) |
9002956f | 682 | |
aa0b6932 | 683 | int |
0613f5d5 | 684 | main (int argc, char **argv) |
9002956f | 685 | { |
974b73e8 KL |
686 | main_argv = argv; |
687 | progname = argv[0]; | |
96c06863 | 688 | message (true, "%s: Sorry, the Emacs server is supported only\n" |
c0f342ab | 689 | "on systems with Berkeley sockets.\n", |
aa0b6932 | 690 | argv[0]); |
974b73e8 | 691 | fail (); |
9002956f KL |
692 | } |
693 | ||
1e7823d0 | 694 | #else /* HAVE_SOCKETS && HAVE_INET_SOCKETS */ |
2828d5f9 | 695 | |
aa0b6932 JB |
696 | #define AUTH_KEY_LENGTH 64 |
697 | #define SEND_BUFFER_SIZE 4096 | |
698 | ||
aa0b6932 JB |
699 | /* Buffer to accumulate data to send in TCP connections. */ |
700 | char send_buffer[SEND_BUFFER_SIZE + 1]; | |
701 | int sblen = 0; /* Fill pointer for the send buffer. */ | |
4b7b77f6 JR |
702 | /* Socket used to communicate with the Emacs server process. */ |
703 | HSOCKET emacs_socket = 0; | |
aa0b6932 | 704 | |
79432772 JB |
705 | /* On Windows, the socket library was historically separate from the |
706 | standard C library, so errors are handled differently. */ | |
707 | ||
b23b5a5b | 708 | static void |
988e88ab | 709 | sock_err_message (const char *function_name) |
d22b00e5 JR |
710 | { |
711 | #ifdef WINDOWSNT | |
712 | char* msg = NULL; | |
713 | ||
714 | FormatMessage (FORMAT_MESSAGE_FROM_SYSTEM | |
715 | | FORMAT_MESSAGE_ALLOCATE_BUFFER | |
716 | | FORMAT_MESSAGE_ARGUMENT_ARRAY, | |
717 | NULL, WSAGetLastError (), 0, (LPTSTR)&msg, 0, NULL); | |
718 | ||
96c06863 | 719 | message (true, "%s: %s: %s\n", progname, function_name, msg); |
d22b00e5 JR |
720 | |
721 | LocalFree (msg); | |
722 | #else | |
96c06863 | 723 | message (true, "%s: %s: %s\n", progname, function_name, strerror (errno)); |
d22b00e5 JR |
724 | #endif |
725 | } | |
726 | ||
727 | ||
aa0b6932 JB |
728 | /* Let's send the data to Emacs when either |
729 | - the data ends in "\n", or | |
730 | - the buffer is full (but this shouldn't happen) | |
731 | Otherwise, we just accumulate it. */ | |
b23b5a5b | 732 | static void |
988e88ab | 733 | send_to_emacs (HSOCKET s, const char *data) |
aa0b6932 | 734 | { |
1e6f32f8 JM |
735 | size_t dlen; |
736 | ||
737 | if (!data) | |
738 | return; | |
739 | ||
740 | dlen = strlen (data); | |
741 | while (*data) | |
2828d5f9 | 742 | { |
1e6f32f8 JM |
743 | size_t part = min (dlen, SEND_BUFFER_SIZE - sblen); |
744 | memcpy (&send_buffer[sblen], data, part); | |
745 | data += part; | |
746 | sblen += part; | |
aa0b6932 JB |
747 | |
748 | if (sblen == SEND_BUFFER_SIZE | |
749 | || (sblen > 0 && send_buffer[sblen-1] == '\n')) | |
750 | { | |
751 | int sent = send (s, send_buffer, sblen, 0); | |
1e6f32f8 JM |
752 | if (sent < 0) |
753 | { | |
96c06863 | 754 | message (true, "%s: failed to send %d bytes to socket: %s\n", |
1e6f32f8 JM |
755 | progname, sblen, strerror (errno)); |
756 | fail (); | |
757 | } | |
aa0b6932 | 758 | if (sent != sblen) |
1e6f32f8 | 759 | memmove (send_buffer, &send_buffer[sent], sblen - sent); |
aa0b6932 JB |
760 | sblen -= sent; |
761 | } | |
1e6f32f8 JM |
762 | |
763 | dlen -= part; | |
2828d5f9 | 764 | } |
2828d5f9 | 765 | } |
2828d5f9 KL |
766 | |
767 | \f | |
0b0d3e0b | 768 | /* In STR, insert a & before each &, each space, each newline, and |
a4cf2096 | 769 | any initial -. Change spaces to underscores, too, so that the |
0b0d3e0b KL |
770 | return value never contains a space. |
771 | ||
3a35a84c | 772 | Does not change the string. Outputs the result to S. */ |
b23b5a5b | 773 | static void |
988e88ab | 774 | quote_argument (HSOCKET s, const char *str) |
5212210c | 775 | { |
9002956f | 776 | char *copy = (char *) xmalloc (strlen (str) * 2 + 1); |
988e88ab J |
777 | const char *p; |
778 | char *q; | |
5212210c | 779 | |
0b0d3e0b | 780 | p = str; |
5212210c RS |
781 | q = copy; |
782 | while (*p) | |
783 | { | |
784 | if (*p == ' ') | |
785 | { | |
f1db6a73 | 786 | *q++ = '&'; |
5212210c RS |
787 | *q++ = '_'; |
788 | p++; | |
789 | } | |
3cf8c6aa SM |
790 | else if (*p == '\n') |
791 | { | |
792 | *q++ = '&'; | |
793 | *q++ = 'n'; | |
794 | p++; | |
795 | } | |
5212210c RS |
796 | else |
797 | { | |
0b0d3e0b | 798 | if (*p == '&' || (*p == '-' && p == str)) |
f1db6a73 | 799 | *q++ = '&'; |
5212210c RS |
800 | *q++ = *p++; |
801 | } | |
802 | } | |
f1db6a73 | 803 | *q++ = 0; |
5212210c | 804 | |
486ba65f | 805 | send_to_emacs (s, copy); |
87209357 EZ |
806 | |
807 | free (copy); | |
5212210c | 808 | } |
0c76956f | 809 | |
0b0d3e0b KL |
810 | |
811 | /* The inverse of quote_argument. Removes quoting in string STR by | |
79432772 | 812 | modifying the string in place. Returns STR. */ |
0b0d3e0b | 813 | |
b23b5a5b | 814 | static char * |
873fbd0b | 815 | unquote_argument (char *str) |
0b0d3e0b KL |
816 | { |
817 | char *p, *q; | |
818 | ||
819 | if (! str) | |
820 | return str; | |
821 | ||
822 | p = str; | |
823 | q = str; | |
824 | while (*p) | |
825 | { | |
826 | if (*p == '&') | |
827 | { | |
828 | p++; | |
829 | if (*p == '&') | |
830 | *p = '&'; | |
831 | else if (*p == '_') | |
832 | *p = ' '; | |
833 | else if (*p == 'n') | |
834 | *p = '\n'; | |
835 | else if (*p == '-') | |
836 | *p = '-'; | |
837 | } | |
838 | *q++ = *p++; | |
839 | } | |
840 | *q = 0; | |
841 | return str; | |
842 | } | |
843 | ||
8f9aaa0a | 844 | \f |
b23b5a5b | 845 | static int |
03fc768b | 846 | file_name_absolute_p (const char *filename) |
b03d27bd JB |
847 | { |
848 | /* Sanity check, it shouldn't happen. */ | |
96c06863 | 849 | if (! filename) return false; |
b03d27bd JB |
850 | |
851 | /* /xxx is always an absolute path. */ | |
96c06863 | 852 | if (filename[0] == '/') return true; |
b03d27bd JB |
853 | |
854 | /* Empty filenames (which shouldn't happen) are relative. */ | |
96c06863 | 855 | if (filename[0] == '\0') return false; |
b03d27bd JB |
856 | |
857 | #ifdef WINDOWSNT | |
71b8f735 | 858 | /* X:\xxx is always absolute. */ |
03fc768b | 859 | if (isalpha ((unsigned char) filename[0]) |
cb0297bb | 860 | && filename[1] == ':' && (filename[2] == '\\' || filename[2] == '/')) |
96c06863 | 861 | return true; |
b03d27bd JB |
862 | |
863 | /* Both \xxx and \\xxx\yyy are absolute. */ | |
96c06863 | 864 | if (filename[0] == '\\') return true; |
b03d27bd JB |
865 | #endif |
866 | ||
96c06863 | 867 | return false; |
b03d27bd JB |
868 | } |
869 | ||
aa0b6932 | 870 | #ifdef WINDOWSNT |
f0384499 | 871 | /* Wrapper to make WSACleanup a cdecl, as required by atexit. */ |
7c3320d8 JB |
872 | void __cdecl |
873 | close_winsock (void) | |
aa0b6932 JB |
874 | { |
875 | WSACleanup (); | |
876 | } | |
0c76956f | 877 | |
b03d27bd JB |
878 | /* Initialize the WinSock2 library. */ |
879 | void | |
7c3320d8 | 880 | initialize_sockets (void) |
0c76956f | 881 | { |
aa0b6932 JB |
882 | WSADATA wsaData; |
883 | ||
aa0b6932 JB |
884 | if (WSAStartup (MAKEWORD (2, 0), &wsaData)) |
885 | { | |
96c06863 | 886 | message (true, "%s: error initializing WinSock2\n", progname); |
aa0b6932 JB |
887 | exit (EXIT_FAILURE); |
888 | } | |
889 | ||
890 | atexit (close_winsock); | |
0c76956f | 891 | } |
e35fc962 | 892 | #endif /* WINDOWSNT */ |
974b73e8 | 893 | |
8f9aaa0a | 894 | \f |
79432772 JB |
895 | /* Read the information needed to set up a TCP comm channel with |
896 | the Emacs server: host, port, and authentication string. */ | |
897 | ||
b23b5a5b | 898 | static int |
6b0c8984 AS |
899 | get_server_config (const char *config_file, struct sockaddr_in *server, |
900 | char *authentication) | |
97e3214d | 901 | { |
aa0b6932 JB |
902 | char dotted[32]; |
903 | char *port; | |
b03d27bd | 904 | FILE *config = NULL; |
aa0b6932 | 905 | |
6b0c8984 AS |
906 | if (file_name_absolute_p (config_file)) |
907 | config = fopen (config_file, "rb"); | |
b03d27bd | 908 | else |
97e3214d | 909 | { |
b9170155 | 910 | const char *home = egetenv ("HOME"); |
88b46d84 | 911 | |
aa0b6932 JB |
912 | if (home) |
913 | { | |
6b0c8984 | 914 | char *path = xmalloc (strlen (home) + strlen (config_file) |
17107bb6 PE |
915 | + EXTRA_SPACE); |
916 | strcpy (path, home); | |
917 | strcat (path, "/.emacs.d/server/"); | |
6b0c8984 | 918 | strcat (path, config_file); |
aa0b6932 | 919 | config = fopen (path, "rb"); |
17107bb6 | 920 | free (path); |
aa0b6932 | 921 | } |
88b46d84 | 922 | #ifdef WINDOWSNT |
7ce8671d | 923 | if (!config && (home = egetenv ("APPDATA"))) |
88b46d84 | 924 | { |
6b0c8984 | 925 | char *path = xmalloc (strlen (home) + strlen (config_file) |
17107bb6 PE |
926 | + EXTRA_SPACE); |
927 | strcpy (path, home); | |
928 | strcat (path, "/.emacs.d/server/"); | |
6b0c8984 | 929 | strcat (path, config_file); |
88b46d84 | 930 | config = fopen (path, "rb"); |
17107bb6 | 931 | free (path); |
88b46d84 JB |
932 | } |
933 | #endif | |
aa0b6932 JB |
934 | } |
935 | ||
936 | if (! config) | |
96c06863 | 937 | return false; |
aa0b6932 JB |
938 | |
939 | if (fgets (dotted, sizeof dotted, config) | |
968ef9b4 JB |
940 | && (port = strchr (dotted, ':'))) |
941 | *port++ = '\0'; | |
97e3214d GM |
942 | else |
943 | { | |
96c06863 | 944 | message (true, "%s: invalid configuration info\n", progname); |
65396510 | 945 | exit (EXIT_FAILURE); |
97e3214d | 946 | } |
97e3214d | 947 | |
aa0b6932 JB |
948 | server->sin_family = AF_INET; |
949 | server->sin_addr.s_addr = inet_addr (dotted); | |
950 | server->sin_port = htons (atoi (port)); | |
97e3214d | 951 | |
aa0b6932 JB |
952 | if (! fread (authentication, AUTH_KEY_LENGTH, 1, config)) |
953 | { | |
96c06863 | 954 | message (true, "%s: cannot read authentication info\n", progname); |
aa0b6932 JB |
955 | exit (EXIT_FAILURE); |
956 | } | |
46cec291 | 957 | |
aa0b6932 | 958 | fclose (config); |
97e3214d | 959 | |
96c06863 | 960 | return true; |
97e3214d GM |
961 | } |
962 | ||
b23b5a5b | 963 | static HSOCKET |
6b0c8984 | 964 | set_tcp_socket (const char *local_server_file) |
aa0b6932 JB |
965 | { |
966 | HSOCKET s; | |
967 | struct sockaddr_in server; | |
aa0b6932 JB |
968 | struct linger l_arg = {1, 1}; |
969 | char auth_string[AUTH_KEY_LENGTH + 1]; | |
9628b887 | 970 | |
6b0c8984 | 971 | if (! get_server_config (local_server_file, &server, auth_string)) |
aa0b6932 JB |
972 | return INVALID_SOCKET; |
973 | ||
0b973fc5 | 974 | if (server.sin_addr.s_addr != inet_addr ("127.0.0.1") && !quiet) |
96c06863 | 975 | message (false, "%s: connected to remote socket at %s\n", |
b03d27bd JB |
976 | progname, inet_ntoa (server.sin_addr)); |
977 | ||
79432772 | 978 | /* Open up an AF_INET socket. */ |
aa0b6932 JB |
979 | if ((s = socket (AF_INET, SOCK_STREAM, IPPROTO_TCP)) < 0) |
980 | { | |
d22b00e5 | 981 | sock_err_message ("socket"); |
aa0b6932 JB |
982 | return INVALID_SOCKET; |
983 | } | |
984 | ||
79432772 | 985 | /* Set up the socket. */ |
aa0b6932 JB |
986 | if (connect (s, (struct sockaddr *) &server, sizeof server) < 0) |
987 | { | |
d22b00e5 | 988 | sock_err_message ("connect"); |
aa0b6932 JB |
989 | return INVALID_SOCKET; |
990 | } | |
991 | ||
aa0b6932 JB |
992 | setsockopt (s, SOL_SOCKET, SO_LINGER, (char *) &l_arg, sizeof l_arg); |
993 | ||
79432772 | 994 | /* Send the authentication. */ |
aa0b6932 JB |
995 | auth_string[AUTH_KEY_LENGTH] = '\0'; |
996 | ||
486ba65f JR |
997 | send_to_emacs (s, "-auth "); |
998 | send_to_emacs (s, auth_string); | |
5ab73228 | 999 | send_to_emacs (s, " "); |
aa0b6932 JB |
1000 | |
1001 | return s; | |
1002 | } | |
1003 | ||
b2ff54a0 JR |
1004 | |
1005 | /* Returns 1 if PREFIX is a prefix of STRING. */ | |
1006 | static int | |
988e88ab | 1007 | strprefix (const char *prefix, const char *string) |
b2ff54a0 | 1008 | { |
cb06b8dc | 1009 | return !strncmp (prefix, string, strlen (prefix)); |
b2ff54a0 JR |
1010 | } |
1011 | ||
a336ee5b CY |
1012 | /* Get tty name and type. If successful, return the type in TTY_TYPE |
1013 | and the name in TTY_NAME, and return 1. Otherwise, fail if NOABORT | |
1014 | is zero, or return 0 if NOABORT is non-zero. */ | |
1015 | ||
b23b5a5b | 1016 | static int |
b9170155 | 1017 | find_tty (const char **tty_type, const char **tty_name, int noabort) |
a336ee5b | 1018 | { |
b9170155 PE |
1019 | const char *type = egetenv ("TERM"); |
1020 | const char *name = ttyname (fileno (stdout)); | |
a336ee5b CY |
1021 | |
1022 | if (!name) | |
1023 | { | |
1024 | if (noabort) | |
1025 | return 0; | |
1026 | else | |
1027 | { | |
96c06863 | 1028 | message (true, "%s: could not get terminal name\n", progname); |
a336ee5b CY |
1029 | fail (); |
1030 | } | |
1031 | } | |
1032 | ||
1033 | if (!type) | |
1034 | { | |
1035 | if (noabort) | |
1036 | return 0; | |
1037 | else | |
1038 | { | |
96c06863 | 1039 | message (true, "%s: please set the TERM variable to your terminal type\n", |
a336ee5b CY |
1040 | progname); |
1041 | fail (); | |
1042 | } | |
1043 | } | |
1044 | ||
1045 | if (strcmp (type, "eterm") == 0) | |
1046 | { | |
1047 | if (noabort) | |
1048 | return 0; | |
1049 | else | |
1050 | { | |
1051 | /* This causes nasty, MULTI_KBOARD-related input lockouts. */ | |
96c06863 | 1052 | message (true, "%s: opening a frame in an Emacs term buffer" |
a336ee5b CY |
1053 | " is not supported\n", progname); |
1054 | fail (); | |
1055 | } | |
1056 | } | |
1057 | ||
1058 | *tty_name = name; | |
1059 | *tty_type = type; | |
1060 | return 1; | |
1061 | } | |
1062 | ||
b2ff54a0 | 1063 | |
aa0b6932 | 1064 | #if !defined (NO_SOCKETS_IN_FILE_SYSTEM) |
46cec291 | 1065 | |
9f637eea GM |
1066 | /* Three possibilities: |
1067 | 2 - can't be `stat'ed (sets errno) | |
1068 | 1 - isn't owned by us | |
1069 | 0 - success: none of the above */ | |
1070 | ||
1071 | static int | |
fe91f5a0 | 1072 | socket_status (const char *name) |
9f637eea GM |
1073 | { |
1074 | struct stat statbfr; | |
1075 | ||
b0bbc07d | 1076 | if (stat (name, &statbfr) == -1) |
9f637eea GM |
1077 | return 2; |
1078 | ||
1079 | if (statbfr.st_uid != geteuid ()) | |
1080 | return 1; | |
0b0d3e0b | 1081 | |
9f637eea GM |
1082 | return 0; |
1083 | } | |
1084 | ||
974b73e8 | 1085 | \f |
da8e1115 KL |
1086 | /* A signal handler that passes the signal to the Emacs process. |
1087 | Useful for SIGWINCH. */ | |
1088 | ||
9af30bdf | 1089 | static void |
428a555e | 1090 | pass_signal_to_emacs (int signalnum) |
9628b887 KL |
1091 | { |
1092 | int old_errno = errno; | |
1093 | ||
9f729af5 | 1094 | if (emacs_pid) |
428a555e | 1095 | kill (emacs_pid, signalnum); |
9f729af5 | 1096 | |
428a555e | 1097 | signal (signalnum, pass_signal_to_emacs); |
9f729af5 KL |
1098 | errno = old_errno; |
1099 | } | |
1100 | ||
0b0d3e0b KL |
1101 | /* Signal handler for SIGCONT; notify the Emacs process that it can |
1102 | now resume our tty frame. */ | |
1103 | ||
9af30bdf | 1104 | static void |
0b0d3e0b KL |
1105 | handle_sigcont (int signalnum) |
1106 | { | |
1107 | int old_errno = errno; | |
d050de75 PE |
1108 | pid_t pgrp = getpgrp (); |
1109 | pid_t tcpgrp = tcgetpgrp (1); | |
0b0d3e0b | 1110 | |
d050de75 | 1111 | if (tcpgrp == pgrp) |
0b0d3e0b | 1112 | { |
591debed | 1113 | /* We are in the foreground. */ |
486ba65f | 1114 | send_to_emacs (emacs_socket, "-resume \n"); |
0b0d3e0b | 1115 | } |
d050de75 | 1116 | else if (0 <= tcpgrp && tty) |
0b0d3e0b | 1117 | { |
591debed | 1118 | /* We are in the background; cancel the continue. */ |
d050de75 | 1119 | kill (-pgrp, SIGTTIN); |
0b0d3e0b | 1120 | } |
c6c53c3e KL |
1121 | |
1122 | signal (signalnum, handle_sigcont); | |
0b0d3e0b KL |
1123 | errno = old_errno; |
1124 | } | |
1125 | ||
1126 | /* Signal handler for SIGTSTP; notify the Emacs process that we are | |
1127 | going to sleep. Normally the suspend is initiated by Emacs via | |
1128 | server-handle-suspend-tty, but if the server gets out of sync with | |
1129 | reality, we may get a SIGTSTP on C-z. Handling this signal and | |
79432772 | 1130 | notifying Emacs about it should get things under control again. */ |
0b0d3e0b | 1131 | |
9af30bdf | 1132 | static void |
0b0d3e0b KL |
1133 | handle_sigtstp (int signalnum) |
1134 | { | |
1135 | int old_errno = errno; | |
1136 | sigset_t set; | |
c0f342ab | 1137 | |
90843190 | 1138 | if (emacs_socket) |
486ba65f | 1139 | send_to_emacs (emacs_socket, "-suspend \n"); |
0b0d3e0b | 1140 | |
5ab73228 | 1141 | /* Unblock this signal and call the default handler by temporarily |
8350f087 | 1142 | changing the handler and resignaling. */ |
0b0d3e0b KL |
1143 | sigprocmask (SIG_BLOCK, NULL, &set); |
1144 | sigdelset (&set, signalnum); | |
1145 | signal (signalnum, SIG_DFL); | |
a7db35b3 | 1146 | raise (signalnum); |
0b0d3e0b KL |
1147 | sigprocmask (SIG_SETMASK, &set, NULL); /* Let's the above signal through. */ |
1148 | signal (signalnum, handle_sigtstp); | |
1149 | ||
1150 | errno = old_errno; | |
1151 | } | |
273b9028 CY |
1152 | |
1153 | ||
da8e1115 | 1154 | /* Set up signal handlers before opening a frame on the current tty. */ |
0b0d3e0b | 1155 | |
b23b5a5b | 1156 | static void |
4d553a13 | 1157 | init_signals (void) |
9628b887 KL |
1158 | { |
1159 | /* Set up signal handlers. */ | |
428a555e | 1160 | signal (SIGWINCH, pass_signal_to_emacs); |
4ca927b4 KL |
1161 | |
1162 | /* Don't pass SIGINT and SIGQUIT to Emacs, because it has no way of | |
1163 | deciding which terminal the signal came from. C-g is now a | |
1164 | normal input event on secondary terminals. */ | |
1165 | #if 0 | |
428a555e KL |
1166 | signal (SIGINT, pass_signal_to_emacs); |
1167 | signal (SIGQUIT, pass_signal_to_emacs); | |
4ca927b4 | 1168 | #endif |
0b0d3e0b KL |
1169 | |
1170 | signal (SIGCONT, handle_sigcont); | |
1171 | signal (SIGTSTP, handle_sigtstp); | |
1172 | signal (SIGTTOU, handle_sigtstp); | |
9628b887 KL |
1173 | } |
1174 | ||
46cec291 | 1175 | |
b23b5a5b | 1176 | static HSOCKET |
6b0c8984 | 1177 | set_local_socket (const char *local_socket_name) |
46cec291 | 1178 | { |
aa0b6932 | 1179 | HSOCKET s; |
46cec291 | 1180 | struct sockaddr_un server; |
46cec291 | 1181 | |
79432772 | 1182 | /* Open up an AF_UNIX socket in this person's home directory. */ |
46cec291 RS |
1183 | if ((s = socket (AF_UNIX, SOCK_STREAM, 0)) < 0) |
1184 | { | |
96c06863 | 1185 | message (true, "%s: socket: %s\n", progname, strerror (errno)); |
aa0b6932 | 1186 | return INVALID_SOCKET; |
46cec291 | 1187 | } |
e69233c2 | 1188 | |
46cec291 | 1189 | server.sun_family = AF_UNIX; |
c5fee545 | 1190 | |
c5fee545 | 1191 | { |
6b0c8984 AS |
1192 | int sock_status; |
1193 | int use_tmpdir = 0; | |
1194 | int saved_errno; | |
1195 | const char *server_name = local_socket_name; | |
4be3dfc5 | 1196 | const char *tmpdir IF_LINT ( = NULL); |
17107bb6 PE |
1197 | char *tmpdir_storage = NULL; |
1198 | char *socket_name_storage = NULL; | |
0b0d3e0b | 1199 | |
6b0c8984 | 1200 | if (!strchr (local_socket_name, '/') && !strchr (local_socket_name, '\\')) |
8966b757 AS |
1201 | { |
1202 | /* socket_name is a file name component. */ | |
17107bb6 PE |
1203 | long uid = geteuid (); |
1204 | ptrdiff_t tmpdirlen; | |
6b0c8984 | 1205 | use_tmpdir = 1; |
f77b11a0 JB |
1206 | tmpdir = egetenv ("TMPDIR"); |
1207 | if (!tmpdir) | |
b336bfcd GM |
1208 | { |
1209 | #ifdef DARWIN_OS | |
e6068ab3 YM |
1210 | #ifndef _CS_DARWIN_USER_TEMP_DIR |
1211 | #define _CS_DARWIN_USER_TEMP_DIR 65537 | |
1212 | #endif | |
b336bfcd GM |
1213 | size_t n = confstr (_CS_DARWIN_USER_TEMP_DIR, NULL, (size_t) 0); |
1214 | if (n > 0) | |
1215 | { | |
17107bb6 | 1216 | tmpdir = tmpdir_storage = xmalloc (n); |
dd1ff7c0 | 1217 | confstr (_CS_DARWIN_USER_TEMP_DIR, tmpdir_storage, n); |
b336bfcd GM |
1218 | } |
1219 | else | |
1220 | #endif | |
1221 | tmpdir = "/tmp"; | |
1222 | } | |
17107bb6 | 1223 | tmpdirlen = strlen (tmpdir); |
6b0c8984 | 1224 | socket_name_storage = |
17107bb6 | 1225 | xmalloc (tmpdirlen + strlen (server_name) + EXTRA_SPACE); |
6b0c8984 AS |
1226 | strcpy (socket_name_storage, tmpdir); |
1227 | sprintf (socket_name_storage + tmpdirlen, "/emacs%ld/", uid); | |
1228 | strcat (socket_name_storage + tmpdirlen, server_name); | |
1229 | local_socket_name = socket_name_storage; | |
254107e4 RS |
1230 | } |
1231 | ||
6b0c8984 AS |
1232 | if (strlen (local_socket_name) < sizeof (server.sun_path)) |
1233 | strcpy (server.sun_path, local_socket_name); | |
254107e4 | 1234 | else |
819b8f00 | 1235 | { |
96c06863 | 1236 | message (true, "%s: socket-name %s too long\n", |
6b0c8984 | 1237 | progname, local_socket_name); |
819b8f00 KL |
1238 | fail (); |
1239 | } | |
efb859b4 | 1240 | |
9f637eea GM |
1241 | /* See if the socket exists, and if it's owned by us. */ |
1242 | sock_status = socket_status (server.sun_path); | |
152b6e83 | 1243 | saved_errno = errno; |
6b0c8984 | 1244 | if (sock_status && use_tmpdir) |
efb859b4 | 1245 | { |
9f637eea GM |
1246 | /* Failing that, see if LOGNAME or USER exist and differ from |
1247 | our euid. If so, look for a socket based on the UID | |
1248 | associated with the name. This is reminiscent of the logic | |
1249 | that init_editfns uses to set the global Vuser_full_name. */ | |
e69233c2 | 1250 | |
b9170155 | 1251 | const char *user_name = egetenv ("LOGNAME"); |
293f9f2a | 1252 | |
9f637eea | 1253 | if (!user_name) |
b9170155 | 1254 | user_name = egetenv ("USER"); |
e69233c2 | 1255 | |
9f637eea GM |
1256 | if (user_name) |
1257 | { | |
1258 | struct passwd *pw = getpwnam (user_name); | |
293f9f2a | 1259 | |
9f637eea GM |
1260 | if (pw && (pw->pw_uid != geteuid ())) |
1261 | { | |
1262 | /* We're running under su, apparently. */ | |
17107bb6 PE |
1263 | long uid = pw->pw_uid; |
1264 | ptrdiff_t tmpdirlen = strlen (tmpdir); | |
6b0c8984 AS |
1265 | char *user_socket_name |
1266 | = xmalloc (tmpdirlen + strlen (server_name) + EXTRA_SPACE); | |
1267 | strcpy (user_socket_name, tmpdir); | |
1268 | sprintf (user_socket_name + tmpdirlen, "/emacs%ld/", uid); | |
1269 | strcat (user_socket_name + tmpdirlen, server_name); | |
1270 | ||
1271 | if (strlen (user_socket_name) < sizeof (server.sun_path)) | |
1272 | strcpy (server.sun_path, user_socket_name); | |
5c9659d3 SM |
1273 | else |
1274 | { | |
96c06863 | 1275 | message (true, "%s: socket-name %s too long\n", |
6b0c8984 | 1276 | progname, user_socket_name); |
65396510 | 1277 | exit (EXIT_FAILURE); |
5c9659d3 | 1278 | } |
6b0c8984 | 1279 | free (user_socket_name); |
5c9659d3 | 1280 | |
9f637eea | 1281 | sock_status = socket_status (server.sun_path); |
b80bf66e | 1282 | saved_errno = errno; |
9f637eea | 1283 | } |
293f9f2a RS |
1284 | else |
1285 | errno = saved_errno; | |
9f637eea | 1286 | } |
efb859b4 | 1287 | } |
e69233c2 | 1288 | |
17107bb6 PE |
1289 | free (socket_name_storage); |
1290 | free (tmpdir_storage); | |
1291 | ||
aa0b6932 JB |
1292 | switch (sock_status) |
1293 | { | |
1294 | case 1: | |
974b73e8 KL |
1295 | /* There's a socket, but it isn't owned by us. This is OK if |
1296 | we are root. */ | |
1297 | if (0 != geteuid ()) | |
1298 | { | |
96c06863 | 1299 | message (true, "%s: Invalid socket owner\n", progname); |
aa0b6932 | 1300 | return INVALID_SOCKET; |
974b73e8 KL |
1301 | } |
1302 | break; | |
aa0b6932 JB |
1303 | |
1304 | case 2: | |
974b73e8 KL |
1305 | /* `stat' failed */ |
1306 | if (saved_errno == ENOENT) | |
96c06863 | 1307 | message (true, |
974b73e8 | 1308 | "%s: can't find socket; have you started the server?\n\ |
45adde32 | 1309 | To start the server in Emacs, type \"M-x server-start\".\n", |
aa0b6932 | 1310 | progname); |
974b73e8 | 1311 | else |
96c06863 | 1312 | message (true, "%s: can't stat %s: %s\n", |
aa0b6932 | 1313 | progname, server.sun_path, strerror (saved_errno)); |
974b73e8 | 1314 | return INVALID_SOCKET; |
aa0b6932 | 1315 | } |
efb859b4 | 1316 | } |
46cec291 | 1317 | |
4e23f2ba JB |
1318 | if (connect (s, (struct sockaddr *) &server, strlen (server.sun_path) + 2) |
1319 | < 0) | |
46cec291 | 1320 | { |
96c06863 | 1321 | message (true, "%s: connect: %s\n", progname, strerror (errno)); |
aa0b6932 | 1322 | return INVALID_SOCKET; |
46cec291 | 1323 | } |
23a7488d | 1324 | |
aa0b6932 JB |
1325 | return s; |
1326 | } | |
1327 | #endif /* ! NO_SOCKETS_IN_FILE_SYSTEM */ | |
1328 | ||
b23b5a5b | 1329 | static HSOCKET |
636b507b | 1330 | set_socket (int no_exit_if_error) |
aa0b6932 | 1331 | { |
b03d27bd | 1332 | HSOCKET s; |
6b0c8984 | 1333 | const char *local_server_file = server_file; |
c0f342ab | 1334 | |
b03d27bd | 1335 | INITIALIZE (); |
c0f342ab | 1336 | |
aa0b6932 | 1337 | #ifndef NO_SOCKETS_IN_FILE_SYSTEM |
b03d27bd JB |
1338 | /* Explicit --socket-name argument. */ |
1339 | if (socket_name) | |
46cec291 | 1340 | { |
6b0c8984 | 1341 | s = set_local_socket (socket_name); |
636b507b | 1342 | if ((s != INVALID_SOCKET) || no_exit_if_error) |
974b73e8 | 1343 | return s; |
96c06863 | 1344 | message (true, "%s: error accessing socket \"%s\"\n", |
974b73e8 | 1345 | progname, socket_name); |
b03d27bd | 1346 | exit (EXIT_FAILURE); |
46cec291 | 1347 | } |
b03d27bd JB |
1348 | #endif |
1349 | ||
1350 | /* Explicit --server-file arg or EMACS_SERVER_FILE variable. */ | |
6b0c8984 AS |
1351 | if (!local_server_file) |
1352 | local_server_file = egetenv ("EMACS_SERVER_FILE"); | |
46cec291 | 1353 | |
6b0c8984 | 1354 | if (local_server_file) |
23a7488d | 1355 | { |
6b0c8984 | 1356 | s = set_tcp_socket (local_server_file); |
636b507b | 1357 | if ((s != INVALID_SOCKET) || no_exit_if_error) |
974b73e8 | 1358 | return s; |
c0f342ab | 1359 | |
96c06863 | 1360 | message (true, "%s: error accessing server file \"%s\"\n", |
6b0c8984 | 1361 | progname, local_server_file); |
b03d27bd | 1362 | exit (EXIT_FAILURE); |
23a7488d | 1363 | } |
c0f342ab | 1364 | |
b03d27bd JB |
1365 | #ifndef NO_SOCKETS_IN_FILE_SYSTEM |
1366 | /* Implicit local socket. */ | |
6b0c8984 | 1367 | s = set_local_socket ("server"); |
b03d27bd JB |
1368 | if (s != INVALID_SOCKET) |
1369 | return s; | |
1370 | #endif | |
23a7488d | 1371 | |
b03d27bd | 1372 | /* Implicit server file. */ |
6b0c8984 | 1373 | s = set_tcp_socket ("server"); |
636b507b | 1374 | if ((s != INVALID_SOCKET) || no_exit_if_error) |
b03d27bd JB |
1375 | return s; |
1376 | ||
1377 | /* No implicit or explicit socket, and no alternate editor. */ | |
96c06863 | 1378 | message (true, "%s: No socket or alternate editor. Please use:\n\n" |
b03d27bd JB |
1379 | #ifndef NO_SOCKETS_IN_FILE_SYSTEM |
1380 | "\t--socket-name\n" | |
ee6a193c | 1381 | #endif |
b03d27bd JB |
1382 | "\t--server-file (or environment variable EMACS_SERVER_FILE)\n\ |
1383 | \t--alternate-editor (or environment variable ALTERNATE_EDITOR)\n", | |
1384 | progname); | |
1385 | exit (EXIT_FAILURE); | |
aa0b6932 | 1386 | } |
46cec291 | 1387 | |
5e0944c6 | 1388 | #ifdef HAVE_NTGUI |
0e0dced5 JB |
1389 | FARPROC set_fg; /* Pointer to AllowSetForegroundWindow. */ |
1390 | FARPROC get_wc; /* Pointer to RealGetWindowClassA. */ | |
1391 | ||
5e0944c6 DC |
1392 | void |
1393 | w32_set_user_model_id (void) | |
1394 | { | |
1395 | HMODULE shell; | |
1396 | HRESULT (WINAPI * set_user_model) (wchar_t * id); | |
1397 | ||
1398 | /* On Windows 7 and later, we need to set the user model ID | |
1399 | to associate emacsclient launched files with Emacs frames | |
1400 | in the UI. */ | |
1401 | shell = LoadLibrary ("shell32.dll"); | |
1402 | if (shell) | |
1403 | { | |
1404 | set_user_model | |
1405 | = (void *) GetProcAddress (shell, | |
1406 | "SetCurrentProcessExplicitAppUserModelID"); | |
1407 | /* If the function is defined, then we are running on Windows 7 | |
1408 | or newer, and the UI uses this to group related windows | |
1409 | together. Since emacs, runemacs, emacsclient are related, we | |
1410 | want them grouped even though the executables are different, | |
1411 | so we need to set a consistent ID between them. */ | |
1412 | if (set_user_model) | |
1413 | set_user_model (L"GNU.Emacs"); | |
1414 | ||
1415 | FreeLibrary (shell); | |
1416 | } | |
1417 | } | |
1418 | ||
0e0dced5 | 1419 | BOOL CALLBACK |
7c3320d8 | 1420 | w32_find_emacs_process (HWND hWnd, LPARAM lParam) |
0e0dced5 JB |
1421 | { |
1422 | DWORD pid; | |
1423 | char class[6]; | |
1424 | ||
1425 | /* Reject any window not of class "Emacs". */ | |
1426 | if (! get_wc (hWnd, class, sizeof (class)) | |
1427 | || strcmp (class, "Emacs")) | |
1428 | return TRUE; | |
1429 | ||
1430 | /* We only need the process id, not the thread id. */ | |
1431 | (void) GetWindowThreadProcessId (hWnd, &pid); | |
1432 | ||
1433 | /* Not the one we're looking for. */ | |
1434 | if (pid != (DWORD) emacs_pid) return TRUE; | |
1435 | ||
1436 | /* OK, let's raise it. */ | |
1437 | set_fg (emacs_pid); | |
1438 | ||
1439 | /* Stop enumeration. */ | |
1440 | return FALSE; | |
1441 | } | |
1442 | ||
79432772 JB |
1443 | /* Search for a window of class "Emacs" and owned by a process with |
1444 | process id = emacs_pid. If found, allow it to grab the focus. */ | |
1445 | ||
0e0dced5 | 1446 | void |
7c3320d8 | 1447 | w32_give_focus (void) |
0e0dced5 | 1448 | { |
ff90fbde | 1449 | HANDLE user32; |
0e0dced5 | 1450 | |
71b8f735 | 1451 | /* It shouldn't happen when dealing with TCP sockets. */ |
0e0dced5 JB |
1452 | if (!emacs_pid) return; |
1453 | ||
ff90fbde JR |
1454 | user32 = GetModuleHandle ("user32.dll"); |
1455 | ||
1456 | if (!user32) | |
1457 | return; | |
0e0dced5 JB |
1458 | |
1459 | /* Modern Windows restrict which processes can set the foreground window. | |
1460 | emacsclient can allow Emacs to grab the focus by calling the function | |
1461 | AllowSetForegroundWindow. Unfortunately, older Windows (W95, W98 and | |
1462 | NT) lack this function, so we have to check its availability. */ | |
ff90fbde JR |
1463 | if ((set_fg = GetProcAddress (user32, "AllowSetForegroundWindow")) |
1464 | && (get_wc = GetProcAddress (user32, "RealGetWindowClassA"))) | |
0e0dced5 | 1465 | EnumWindows (w32_find_emacs_process, (LPARAM) 0); |
0e0dced5 | 1466 | } |
5e0944c6 | 1467 | #endif /* HAVE_NTGUI */ |
0e0dced5 | 1468 | |
636b507b DN |
1469 | /* Start the emacs daemon and try to connect to it. */ |
1470 | ||
b23b5a5b | 1471 | static void |
636b507b DN |
1472 | start_daemon_and_retry_set_socket (void) |
1473 | { | |
802bdb3c | 1474 | #ifndef WINDOWSNT |
636b507b DN |
1475 | pid_t dpid; |
1476 | int status; | |
636b507b DN |
1477 | |
1478 | dpid = fork (); | |
1479 | ||
1480 | if (dpid > 0) | |
1481 | { | |
fd95644b DN |
1482 | pid_t w; |
1483 | w = waitpid (dpid, &status, WUNTRACED | WCONTINUED); | |
636b507b | 1484 | |
361358ea | 1485 | if ((w == -1) || !WIFEXITED (status) || WEXITSTATUS (status)) |
fd95644b | 1486 | { |
96c06863 | 1487 | message (true, "Error: Could not start the Emacs daemon\n"); |
fd95644b DN |
1488 | exit (EXIT_FAILURE); |
1489 | } | |
1490 | ||
1491 | /* Try connecting, the daemon should have started by now. */ | |
96c06863 | 1492 | message (true, "Emacs daemon should have started, trying to connect again\n"); |
636b507b | 1493 | if ((emacs_socket = set_socket (1)) == INVALID_SOCKET) |
fd95644b | 1494 | { |
96c06863 | 1495 | message (true, "Error: Cannot connect even after starting the Emacs daemon\n"); |
fd95644b DN |
1496 | exit (EXIT_FAILURE); |
1497 | } | |
636b507b DN |
1498 | } |
1499 | else if (dpid < 0) | |
1500 | { | |
fd95644b | 1501 | fprintf (stderr, "Error: Cannot fork!\n"); |
6ab88e02 | 1502 | exit (EXIT_FAILURE); |
636b507b DN |
1503 | } |
1504 | else | |
1505 | { | |
988e88ab | 1506 | char emacs[] = "emacs"; |
b0bbc07d | 1507 | char daemon_option[] = "--daemon"; |
29abe551 PE |
1508 | char *d_argv[3]; |
1509 | d_argv[0] = emacs; | |
1510 | d_argv[1] = daemon_option; | |
1511 | d_argv[2] = 0; | |
636b507b DN |
1512 | if (socket_name != NULL) |
1513 | { | |
1514 | /* Pass --daemon=socket_name as argument. */ | |
988e88ab | 1515 | const char *deq = "--daemon="; |
17107bb6 PE |
1516 | char *daemon_arg = xmalloc (strlen (deq) |
1517 | + strlen (socket_name) + 1); | |
636b507b DN |
1518 | strcpy (daemon_arg, deq); |
1519 | strcat (daemon_arg, socket_name); | |
1520 | d_argv[1] = daemon_arg; | |
1521 | } | |
1522 | execvp ("emacs", d_argv); | |
96c06863 | 1523 | message (true, "%s: error starting emacs daemon\n", progname); |
636b507b | 1524 | } |
802bdb3c | 1525 | #endif /* WINDOWSNT */ |
636b507b DN |
1526 | } |
1527 | ||
aa0b6932 | 1528 | int |
873fbd0b | 1529 | main (int argc, char **argv) |
aa0b6932 | 1530 | { |
c5443aa5 | 1531 | int rl = 0, needlf = 0; |
974b73e8 | 1532 | char *cwd, *str; |
aa0b6932 | 1533 | char string[BUFSIZ+1]; |
4be3dfc5 | 1534 | int start_daemon_if_needed; |
3ecb8d93 | 1535 | int exit_status = EXIT_SUCCESS; |
aa0b6932 | 1536 | |
974b73e8 | 1537 | main_argv = argv; |
aa0b6932 JB |
1538 | progname = argv[0]; |
1539 | ||
5e0944c6 | 1540 | #ifdef HAVE_NTGUI |
6b59694e DC |
1541 | /* On Windows 7 and later, we need to explicitly associate |
1542 | emacsclient with emacs so the UI behaves sensibly. This | |
1543 | association does no harm if we're not actually connecting to an | |
1544 | Emacs using a window display. */ | |
ff90fbde | 1545 | w32_set_user_model_id (); |
5e0944c6 | 1546 | #endif /* HAVE_NTGUI */ |
ff90fbde | 1547 | |
aa0b6932 JB |
1548 | /* Process options. */ |
1549 | decode_options (argc, argv); | |
1550 | ||
273b9028 | 1551 | if ((argc - optind < 1) && !eval && current_frame) |
23a7488d | 1552 | { |
96c06863 | 1553 | message (true, "%s: file name or argument required\n" |
974b73e8 KL |
1554 | "Try `%s --help' for more information\n", |
1555 | progname, progname); | |
aa0b6932 | 1556 | exit (EXIT_FAILURE); |
23a7488d RS |
1557 | } |
1558 | ||
f11352e6 | 1559 | #ifndef WINDOWSNT |
d050de75 PE |
1560 | if (tty) |
1561 | { | |
1562 | pid_t pgrp = getpgrp (); | |
1563 | pid_t tcpgrp = tcgetpgrp (1); | |
1564 | if (0 <= tcpgrp && tcpgrp != pgrp) | |
1565 | kill (-pgrp, SIGTTIN); | |
1566 | } | |
f11352e6 | 1567 | #endif /* !WINDOWSNT */ |
d050de75 | 1568 | |
636b507b DN |
1569 | /* If alternate_editor is the empty string, start the emacs daemon |
1570 | in case of failure to connect. */ | |
1571 | start_daemon_if_needed = (alternate_editor | |
1572 | && (alternate_editor[0] == '\0')); | |
aa0b6932 | 1573 | |
7e6bb4c9 PE |
1574 | emacs_socket = set_socket (alternate_editor || start_daemon_if_needed); |
1575 | if (emacs_socket == INVALID_SOCKET) | |
1576 | { | |
1577 | if (! start_daemon_if_needed) | |
1578 | fail (); | |
1579 | ||
7e6bb4c9 PE |
1580 | start_daemon_and_retry_set_socket (); |
1581 | } | |
974b73e8 KL |
1582 | |
1583 | cwd = get_current_dir_name (); | |
46cec291 RS |
1584 | if (cwd == 0) |
1585 | { | |
96c06863 | 1586 | message (true, "%s: %s\n", progname, |
974b73e8 | 1587 | "Cannot get current working directory"); |
819b8f00 | 1588 | fail (); |
46cec291 RS |
1589 | } |
1590 | ||
5e0944c6 | 1591 | #ifdef HAVE_NTGUI |
efc3dd3c | 1592 | if (display && !strcmp (display, "w32")) |
0e0dced5 | 1593 | w32_give_focus (); |
5e0944c6 | 1594 | #endif /* HAVE_NTGUI */ |
c66648e0 | 1595 | |
273b9028 | 1596 | /* Send over our environment and current directory. */ |
59e085e0 KL |
1597 | if (!current_frame) |
1598 | { | |
59e085e0 KL |
1599 | int i; |
1600 | for (i = 0; environ[i]; i++) | |
1601 | { | |
486ba65f JR |
1602 | send_to_emacs (emacs_socket, "-env "); |
1603 | quote_argument (emacs_socket, environ[i]); | |
1604 | send_to_emacs (emacs_socket, " "); | |
59e085e0 | 1605 | } |
2828d5f9 | 1606 | } |
ba528748 SM |
1607 | send_to_emacs (emacs_socket, "-dir "); |
1608 | quote_argument (emacs_socket, cwd); | |
1609 | send_to_emacs (emacs_socket, "/"); | |
1610 | send_to_emacs (emacs_socket, " "); | |
2828d5f9 | 1611 | |
6afdd335 | 1612 | retry: |
5212210c | 1613 | if (nowait) |
486ba65f | 1614 | send_to_emacs (emacs_socket, "-nowait "); |
292d74a3 | 1615 | |
92071250 | 1616 | if (current_frame) |
486ba65f | 1617 | send_to_emacs (emacs_socket, "-current-frame "); |
c0f342ab | 1618 | |
30be2360 | 1619 | if (display) |
87209357 | 1620 | { |
486ba65f JR |
1621 | send_to_emacs (emacs_socket, "-display "); |
1622 | quote_argument (emacs_socket, display); | |
1623 | send_to_emacs (emacs_socket, " "); | |
87209357 | 1624 | } |
30be2360 | 1625 | |
0191e222 CY |
1626 | if (parent_id) |
1627 | { | |
1628 | send_to_emacs (emacs_socket, "-parent-id "); | |
1629 | quote_argument (emacs_socket, parent_id); | |
1630 | send_to_emacs (emacs_socket, " "); | |
1631 | } | |
1632 | ||
18a4ce5e AR |
1633 | if (frame_parameters && !current_frame) |
1634 | { | |
1635 | send_to_emacs (emacs_socket, "-frame-parameters "); | |
1636 | quote_argument (emacs_socket, frame_parameters); | |
1637 | send_to_emacs (emacs_socket, " "); | |
1638 | } | |
1639 | ||
2d0e8e61 CY |
1640 | /* Unless we are certain we don't want to occupy the tty, send our |
1641 | tty information to Emacs. For example, in daemon mode Emacs may | |
1642 | need to occupy this tty if no other frame is available. */ | |
1643 | if (!current_frame || !eval) | |
9628b887 | 1644 | { |
b9170155 | 1645 | const char *tty_type, *tty_name; |
0b0d3e0b | 1646 | |
273b9028 CY |
1647 | if (find_tty (&tty_type, &tty_name, !tty)) |
1648 | { | |
b2ff54a0 | 1649 | #if !defined (NO_SOCKETS_IN_FILE_SYSTEM) |
273b9028 | 1650 | init_signals (); |
b2ff54a0 | 1651 | #endif |
273b9028 CY |
1652 | send_to_emacs (emacs_socket, "-tty "); |
1653 | quote_argument (emacs_socket, tty_name); | |
1654 | send_to_emacs (emacs_socket, " "); | |
1655 | quote_argument (emacs_socket, tty_type); | |
1656 | send_to_emacs (emacs_socket, " "); | |
1657 | } | |
9628b887 | 1658 | } |
77134727 | 1659 | |
273b9028 | 1660 | if (!current_frame && !tty) |
486ba65f | 1661 | send_to_emacs (emacs_socket, "-window-system "); |
0b0d3e0b | 1662 | |
87209357 | 1663 | if ((argc - optind > 0)) |
5212210c | 1664 | { |
b0bbc07d | 1665 | int i; |
87209357 | 1666 | for (i = optind; i < argc; i++) |
46cec291 | 1667 | { |
0b0d3e0b | 1668 | |
87209357 | 1669 | if (eval) |
0b0d3e0b | 1670 | { |
974b73e8 | 1671 | /* Don't prepend cwd or anything like that. */ |
486ba65f JR |
1672 | send_to_emacs (emacs_socket, "-eval "); |
1673 | quote_argument (emacs_socket, argv[i]); | |
1674 | send_to_emacs (emacs_socket, " "); | |
0b0d3e0b KL |
1675 | continue; |
1676 | } | |
1677 | ||
1678 | if (*argv[i] == '+') | |
1679 | { | |
87209357 EZ |
1680 | char *p = argv[i] + 1; |
1681 | while (isdigit ((unsigned char) *p) || *p == ':') p++; | |
0b0d3e0b KL |
1682 | if (*p == 0) |
1683 | { | |
486ba65f JR |
1684 | send_to_emacs (emacs_socket, "-position "); |
1685 | quote_argument (emacs_socket, argv[i]); | |
1686 | send_to_emacs (emacs_socket, " "); | |
0b0d3e0b KL |
1687 | continue; |
1688 | } | |
0b0d3e0b | 1689 | } |
6cde1b21 JB |
1690 | #ifdef WINDOWSNT |
1691 | else if (! file_name_absolute_p (argv[i]) | |
1692 | && (isalpha (argv[i][0]) && argv[i][1] == ':')) | |
1693 | /* Windows can have a different default directory for each | |
1694 | drive, so the cwd passed via "-dir" is not sufficient | |
1695 | to account for that. | |
1696 | If the user uses <drive>:<relpath>, we hence need to be | |
1697 | careful to expand <relpath> with the default directory | |
1698 | corresponding to <drive>. */ | |
1699 | { | |
1700 | char *filename = (char *) xmalloc (MAX_PATH); | |
1701 | DWORD size; | |
1702 | ||
1703 | size = GetFullPathName (argv[i], MAX_PATH, filename, NULL); | |
1704 | if (size > 0 && size < MAX_PATH) | |
1705 | argv[i] = filename; | |
1706 | else | |
1707 | free (filename); | |
1708 | } | |
1709 | #endif | |
0b0d3e0b | 1710 | |
486ba65f | 1711 | send_to_emacs (emacs_socket, "-file "); |
486ba65f JR |
1712 | quote_argument (emacs_socket, argv[i]); |
1713 | send_to_emacs (emacs_socket, " "); | |
0b0d3e0b | 1714 | } |
46cec291 | 1715 | } |
273b9028 | 1716 | else if (eval) |
87209357 | 1717 | { |
273b9028 CY |
1718 | /* Read expressions interactively. */ |
1719 | while ((str = fgets (string, BUFSIZ, stdin))) | |
1720 | { | |
1721 | send_to_emacs (emacs_socket, "-eval "); | |
1722 | quote_argument (emacs_socket, str); | |
1723 | } | |
1724 | send_to_emacs (emacs_socket, " "); | |
87209357 | 1725 | } |
0b0d3e0b | 1726 | |
486ba65f | 1727 | send_to_emacs (emacs_socket, "\n"); |
46cec291 | 1728 | |
fc2040c0 | 1729 | /* Wait for an answer. */ |
0b973fc5 | 1730 | if (!eval && !tty && !nowait && !quiet) |
30be2360 SM |
1731 | { |
1732 | printf ("Waiting for Emacs..."); | |
1733 | needlf = 2; | |
1734 | } | |
46cec291 | 1735 | fflush (stdout); |
47d7532e PE |
1736 | while (fdatasync (1) != 0 && errno == EINTR) |
1737 | continue; | |
46cec291 | 1738 | |
3cf8c6aa | 1739 | /* Now, wait for an answer and print any messages. */ |
b166dcd8 | 1740 | while (exit_status == EXIT_SUCCESS) |
3cf8c6aa | 1741 | { |
2b84f674 | 1742 | char *p, *end_p; |
b166dcd8 KC |
1743 | do |
1744 | { | |
1745 | errno = 0; | |
1746 | rl = recv (emacs_socket, string, BUFSIZ, 0); | |
1747 | } | |
1748 | /* If we receive a signal (e.g. SIGWINCH, which we pass | |
1749 | through to Emacs), on some OSes we get EINTR and must retry. */ | |
1750 | while (rl < 0 && errno == EINTR); | |
1751 | ||
1752 | if (rl <= 0) | |
1753 | break; | |
b23b5a5b | 1754 | |
974b73e8 KL |
1755 | string[rl] = '\0'; |
1756 | ||
2b84f674 AS |
1757 | /* Loop over all NL-terminated messages. */ |
1758 | for (end_p = p = string; end_p != NULL && *end_p != '\0'; p = end_p) | |
1759 | { | |
1760 | end_p = strchr (p, '\n'); | |
1761 | if (end_p != NULL) | |
1762 | *end_p++ = '\0'; | |
0b0d3e0b | 1763 | |
6b59694e DC |
1764 | if (strprefix ("-emacs-pid ", p)) |
1765 | { | |
1766 | /* -emacs-pid PID: The process id of the Emacs process. */ | |
1767 | emacs_pid = strtol (p + strlen ("-emacs-pid"), NULL, 10); | |
1768 | } | |
1769 | else if (strprefix ("-window-system-unsupported ", p)) | |
1770 | { | |
1771 | /* -window-system-unsupported: Emacs was compiled without support | |
1772 | for whatever window system we tried. Try the alternate | |
1773 | display, or, failing that, try the terminal. */ | |
1774 | if (alt_display) | |
1775 | { | |
1776 | display = alt_display; | |
1777 | alt_display = NULL; | |
1778 | } | |
1779 | else | |
1780 | { | |
1781 | nowait = 0; | |
1782 | tty = 1; | |
1783 | } | |
1784 | ||
1785 | goto retry; | |
1786 | } | |
1787 | else if (strprefix ("-print ", p)) | |
1788 | { | |
1789 | /* -print STRING: Print STRING on the terminal. */ | |
1790 | str = unquote_argument (p + strlen ("-print ")); | |
1791 | if (needlf) | |
1792 | printf ("\n"); | |
1793 | printf ("%s", str); | |
1794 | needlf = str[0] == '\0' ? needlf : str[strlen (str) - 1] != '\n'; | |
1795 | } | |
1796 | else if (strprefix ("-print-nonl ", p)) | |
1797 | { | |
1798 | /* -print-nonl STRING: Print STRING on the terminal. | |
1799 | Used to continue a preceding -print command. */ | |
1800 | str = unquote_argument (p + strlen ("-print-nonl ")); | |
1801 | printf ("%s", str); | |
1802 | needlf = str[0] == '\0' ? needlf : str[strlen (str) - 1] != '\n'; | |
1803 | } | |
1804 | else if (strprefix ("-error ", p)) | |
1805 | { | |
1806 | /* -error DESCRIPTION: Signal an error on the terminal. */ | |
1807 | str = unquote_argument (p + strlen ("-error ")); | |
1808 | if (needlf) | |
1809 | printf ("\n"); | |
1810 | fprintf (stderr, "*ERROR*: %s", str); | |
1811 | needlf = str[0] == '\0' ? needlf : str[strlen (str) - 1] != '\n'; | |
1812 | exit_status = EXIT_FAILURE; | |
1813 | } | |
c801ad51 | 1814 | #ifdef SIGSTOP |
2b84f674 AS |
1815 | else if (strprefix ("-suspend ", p)) |
1816 | { | |
1817 | /* -suspend: Suspend this terminal, i.e., stop the process. */ | |
1818 | if (needlf) | |
1819 | printf ("\n"); | |
1820 | needlf = 0; | |
1821 | kill (0, SIGSTOP); | |
1822 | } | |
b2ff54a0 | 1823 | #endif |
2b84f674 AS |
1824 | else |
1825 | { | |
1826 | /* Unknown command. */ | |
1827 | if (needlf) | |
1828 | printf ("\n"); | |
1829 | needlf = 0; | |
1830 | printf ("*ERROR*: Unknown message: %s\n", p); | |
1831 | } | |
1832 | } | |
3cf8c6aa SM |
1833 | } |
1834 | ||
1835 | if (needlf) | |
1836 | printf ("\n"); | |
1837 | fflush (stdout); | |
47d7532e PE |
1838 | while (fdatasync (1) != 0 && errno == EINTR) |
1839 | continue; | |
23a7488d | 1840 | |
3ecb8d93 WS |
1841 | if (rl < 0) |
1842 | exit_status = EXIT_FAILURE; | |
1843 | ||
4b7b77f6 | 1844 | CLOSE_SOCKET (emacs_socket); |
3ecb8d93 | 1845 | return exit_status; |
46cec291 RS |
1846 | } |
1847 | ||
1e7823d0 | 1848 | #endif /* HAVE_SOCKETS && HAVE_INET_SOCKETS */ |