Commit | Line | Data |
---|---|---|
efb859b4 | 1 | /* Client process that communicates with GNU Emacs acting as server. |
92b47a4a | 2 | Copyright (C) 1986, 1987, 1994, 1999, 2000, 2001, 2002, 2003, 2004, |
114f9c96 | 3 | 2005, 2006, 2007, 2008, 2009, 2010 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 | |
bc28de71 JB |
25 | /* config.h defines these, which disables sockets altogether! */ |
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 JB |
41 | |
42 | #else /* !WINDOWSNT */ | |
43 | ||
67c1df01 | 44 | # include "syswait.h" |
ed4a3730 | 45 | |
1e7823d0 JB |
46 | # ifdef HAVE_INET_SOCKETS |
47 | # include <netinet/in.h> | |
0613f5d5 DN |
48 | # ifdef HAVE_SOCKETS |
49 | # include <sys/types.h> | |
50 | # include <sys/socket.h> | |
51 | # include <sys/un.h> | |
52 | # endif /* HAVE_SOCKETS */ | |
1e7823d0 | 53 | # endif |
18d2ad29 | 54 | # include <arpa/inet.h> |
448d4085 | 55 | |
e35fc962 | 56 | # define INVALID_SOCKET -1 |
aa0b6932 JB |
57 | # define HSOCKET int |
58 | # define CLOSE_SOCKET close | |
aa0b6932 | 59 | # define INITIALIZE() |
411b80a5 | 60 | |
5445ab06 DN |
61 | # ifndef WCONTINUED |
62 | # define WCONTINUED 8 | |
63 | # endif | |
64 | ||
411b80a5 | 65 | #endif /* !WINDOWSNT */ |
aa0b6932 | 66 | |
4e23f2ba | 67 | #undef signal |
46cec291 | 68 | |
42073bfb | 69 | #include <stdarg.h> |
e69233c2 | 70 | #include <ctype.h> |
8f9aaa0a | 71 | #include <stdio.h> |
aa0b6932 | 72 | #include "getopt.h" |
79f13bba | 73 | #ifdef HAVE_UNISTD_H |
0613f5d5 | 74 | # include <unistd.h> |
79f13bba | 75 | #endif |
8f9aaa0a | 76 | |
0613f5d5 | 77 | #include <pwd.h> |
dc4a4a14 | 78 | #include <sys/stat.h> |
9628b887 | 79 | #include <signal.h> |
4d553a13 | 80 | #include <errno.h> |
9628b887 | 81 | |
0613f5d5 | 82 | |
9628b887 | 83 | \f |
873fbd0b | 84 | char *getenv (const char *), *getwd (char *); |
35a7804d JB |
85 | #ifdef HAVE_GETCWD |
86 | char *(getcwd) (char *, size_t); | |
87 | #endif | |
8f9aaa0a | 88 | |
7ce8671d | 89 | #ifdef WINDOWSNT |
361358ea | 90 | char *w32_getenv (char *); |
7ce8671d JB |
91 | #define egetenv(VAR) w32_getenv(VAR) |
92 | #else | |
93 | #define egetenv(VAR) getenv(VAR) | |
94 | #endif | |
95 | ||
8f9aaa0a RS |
96 | #ifndef VERSION |
97 | #define VERSION "unspecified" | |
98 | #endif | |
99 | \f | |
aa0b6932 JB |
100 | |
101 | #ifndef EXIT_SUCCESS | |
102 | #define EXIT_SUCCESS 0 | |
103 | #endif | |
104 | ||
105 | #ifndef EXIT_FAILURE | |
106 | #define EXIT_FAILURE 1 | |
107 | #endif | |
108 | ||
109 | #ifndef FALSE | |
110 | #define FALSE 0 | |
111 | #endif | |
112 | ||
113 | #ifndef TRUE | |
114 | #define TRUE 1 | |
115 | #endif | |
116 | ||
bc558f3e JB |
117 | /* Additional space when allocating buffers for filenames, etc. */ |
118 | #define EXTRA_SPACE 100 | |
119 | ||
aa0b6932 | 120 | \f |
8f9aaa0a RS |
121 | /* Name used to invoke this program. */ |
122 | char *progname; | |
123 | ||
0a125897 KL |
124 | /* The second argument to main. */ |
125 | char **main_argv; | |
126 | ||
749ae770 | 127 | /* Nonzero means don't wait for a response from Emacs. --no-wait. */ |
8f9aaa0a RS |
128 | int nowait = 0; |
129 | ||
30be2360 SM |
130 | /* Nonzero means args are expressions to be evaluated. --eval. */ |
131 | int eval = 0; | |
132 | ||
31fa6595 SM |
133 | /* Nonzero means don't open a new frame. Inverse of --create-frame. */ |
134 | int current_frame = 1; | |
92071250 | 135 | |
30be2360 | 136 | /* The display on which Emacs should work. --display. */ |
988e88ab | 137 | const char *display = NULL; |
30be2360 | 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. */ |
254107e4 RS |
150 | char *socket_name = NULL; |
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 | ||
873fbd0b | 158 | void print_help_and_exit (void) NO_RETURN; |
68441b90 DN |
159 | void fail (void) NO_RETURN; |
160 | ||
7f3bff3e | 161 | |
8f9aaa0a RS |
162 | struct option longopts[] = |
163 | { | |
749ae770 | 164 | { "no-wait", no_argument, NULL, 'n' }, |
30be2360 | 165 | { "eval", no_argument, NULL, 'e' }, |
8f9aaa0a RS |
166 | { "help", no_argument, NULL, 'H' }, |
167 | { "version", no_argument, NULL, 'V' }, | |
b28c910d | 168 | { "tty", no_argument, NULL, 't' }, |
dc1cd5f7 | 169 | { "nw", no_argument, NULL, 't' }, |
31fa6595 | 170 | { "create-frame", no_argument, NULL, 'c' }, |
3cf8c6aa | 171 | { "alternate-editor", required_argument, NULL, 'a' }, |
b03d27bd | 172 | #ifndef NO_SOCKETS_IN_FILE_SYSTEM |
254107e4 | 173 | { "socket-name", required_argument, NULL, 's' }, |
b03d27bd | 174 | #endif |
aa0b6932 | 175 | { "server-file", required_argument, NULL, 'f' }, |
0ebec7d3 | 176 | #ifndef WINDOWSNT |
30be2360 | 177 | { "display", required_argument, NULL, 'd' }, |
0ebec7d3 | 178 | #endif |
0191e222 | 179 | { "parent-id", required_argument, NULL, 'p' }, |
30be2360 | 180 | { 0, 0, 0, 0 } |
8f9aaa0a RS |
181 | }; |
182 | ||
974b73e8 KL |
183 | \f |
184 | /* Like malloc but get fatal error if memory is exhausted. */ | |
185 | ||
186 | long * | |
873fbd0b | 187 | xmalloc (unsigned int size) |
974b73e8 KL |
188 | { |
189 | long *result = (long *) malloc (size); | |
190 | if (result == NULL) | |
191 | { | |
192 | perror ("malloc"); | |
193 | exit (EXIT_FAILURE); | |
194 | } | |
195 | return result; | |
196 | } | |
197 | ||
198 | /* Like strdup but get a fatal error if memory is exhausted. */ | |
199 | ||
200 | char * | |
201 | xstrdup (const char *s) | |
202 | { | |
203 | char *result = strdup (s); | |
204 | if (result == NULL) | |
205 | { | |
206 | perror ("strdup"); | |
207 | exit (EXIT_FAILURE); | |
208 | } | |
209 | return result; | |
210 | } | |
211 | ||
212 | /* From sysdep.c */ | |
213 | #if !defined (HAVE_GET_CURRENT_DIR_NAME) || defined (BROKEN_GET_CURRENT_DIR_NAME) | |
214 | ||
cb06b8dc SM |
215 | /* From lisp.h */ |
216 | #ifndef DIRECTORY_SEP | |
217 | #define DIRECTORY_SEP '/' | |
218 | #endif | |
219 | #ifndef IS_DIRECTORY_SEP | |
220 | #define IS_DIRECTORY_SEP(_c_) ((_c_) == DIRECTORY_SEP) | |
221 | #endif | |
222 | #ifndef IS_DEVICE_SEP | |
223 | #ifndef DEVICE_SEP | |
224 | #define IS_DEVICE_SEP(_c_) 0 | |
225 | #else | |
226 | #define IS_DEVICE_SEP(_c_) ((_c_) == DEVICE_SEP) | |
227 | #endif | |
228 | #endif | |
229 | #ifndef IS_ANY_SEP | |
230 | #define IS_ANY_SEP(_c_) (IS_DIRECTORY_SEP (_c_)) | |
231 | #endif | |
232 | ||
233 | ||
974b73e8 | 234 | /* Return the current working directory. Returns NULL on errors. |
5ab73228 | 235 | Any other returned value must be freed with free. This is used |
974b73e8 KL |
236 | only when get_current_dir_name is not defined on the system. */ |
237 | char* | |
7c3320d8 | 238 | get_current_dir_name (void) |
974b73e8 KL |
239 | { |
240 | char *buf; | |
241 | char *pwd; | |
242 | struct stat dotstat, pwdstat; | |
243 | /* If PWD is accurate, use it instead of calling getwd. PWD is | |
244 | sometimes a nicer name, and using it may avoid a fatal error if a | |
245 | parent directory is searchable but not readable. */ | |
7ce8671d | 246 | if ((pwd = egetenv ("PWD")) != 0 |
974b73e8 KL |
247 | && (IS_DIRECTORY_SEP (*pwd) || (*pwd && IS_DEVICE_SEP (pwd[1]))) |
248 | && stat (pwd, &pwdstat) == 0 | |
249 | && stat (".", &dotstat) == 0 | |
250 | && dotstat.st_ino == pwdstat.st_ino | |
251 | && dotstat.st_dev == pwdstat.st_dev | |
252 | #ifdef MAXPATHLEN | |
253 | && strlen (pwd) < MAXPATHLEN | |
254 | #endif | |
255 | ) | |
256 | { | |
257 | buf = (char *) xmalloc (strlen (pwd) + 1); | |
258 | if (!buf) | |
259 | return NULL; | |
260 | strcpy (buf, pwd); | |
261 | } | |
262 | #ifdef HAVE_GETCWD | |
263 | else | |
264 | { | |
265 | size_t buf_size = 1024; | |
266 | buf = (char *) xmalloc (buf_size); | |
267 | if (!buf) | |
268 | return NULL; | |
269 | for (;;) | |
270 | { | |
271 | if (getcwd (buf, buf_size) == buf) | |
272 | break; | |
273 | if (errno != ERANGE) | |
274 | { | |
275 | int tmp_errno = errno; | |
276 | free (buf); | |
277 | errno = tmp_errno; | |
278 | return NULL; | |
279 | } | |
280 | buf_size *= 2; | |
281 | buf = (char *) realloc (buf, buf_size); | |
282 | if (!buf) | |
283 | return NULL; | |
284 | } | |
285 | } | |
286 | #else | |
287 | else | |
288 | { | |
289 | /* We need MAXPATHLEN here. */ | |
290 | buf = (char *) xmalloc (MAXPATHLEN + 1); | |
291 | if (!buf) | |
292 | return NULL; | |
293 | if (getwd (buf) == NULL) | |
294 | { | |
295 | int tmp_errno = errno; | |
296 | free (buf); | |
297 | errno = tmp_errno; | |
298 | return NULL; | |
299 | } | |
300 | } | |
301 | #endif | |
302 | return buf; | |
303 | } | |
304 | #endif | |
305 | ||
42073bfb | 306 | #ifdef WINDOWSNT |
7ce8671d JB |
307 | |
308 | #define REG_ROOT "SOFTWARE\\GNU\\Emacs" | |
309 | ||
310 | /* Retrieve an environment variable from the Emacs subkeys of the registry. | |
311 | Return NULL if the variable was not found, or it was empty. | |
312 | This code is based on w32_get_resource (w32.c). */ | |
313 | char * | |
7c3320d8 | 314 | w32_get_resource (HKEY predefined, char *key, LPDWORD type) |
7ce8671d JB |
315 | { |
316 | HKEY hrootkey = NULL; | |
317 | char *result = NULL; | |
318 | DWORD cbData; | |
319 | ||
320 | if (RegOpenKeyEx (predefined, REG_ROOT, 0, KEY_READ, &hrootkey) == ERROR_SUCCESS) | |
321 | { | |
322 | if (RegQueryValueEx (hrootkey, key, NULL, NULL, NULL, &cbData) == ERROR_SUCCESS) | |
323 | { | |
324 | result = (char *) xmalloc (cbData); | |
325 | ||
bc558f3e JB |
326 | if ((RegQueryValueEx (hrootkey, key, NULL, type, result, &cbData) != ERROR_SUCCESS) |
327 | || (*result == 0)) | |
7ce8671d JB |
328 | { |
329 | free (result); | |
330 | result = NULL; | |
331 | } | |
332 | } | |
333 | ||
334 | RegCloseKey (hrootkey); | |
335 | } | |
336 | ||
337 | return result; | |
338 | } | |
339 | ||
340 | /* | |
341 | getenv wrapper for Windows | |
342 | ||
768c0c0f | 343 | This is needed to duplicate Emacs's behavior, which is to look for environment |
7ce8671d JB |
344 | variables in the registry if they don't appear in the environment. |
345 | */ | |
346 | char * | |
7c3320d8 | 347 | w32_getenv (char *envvar) |
7ce8671d JB |
348 | { |
349 | char *value; | |
350 | DWORD dwType; | |
351 | ||
352 | if (value = getenv (envvar)) | |
353 | /* Found in the environment. */ | |
354 | return value; | |
355 | ||
356 | if (! (value = w32_get_resource (HKEY_CURRENT_USER, envvar, &dwType)) && | |
357 | ! (value = w32_get_resource (HKEY_LOCAL_MACHINE, envvar, &dwType))) | |
d41784ee EZ |
358 | { |
359 | /* "w32console" is what Emacs on Windows uses for tty-type under -nw. */ | |
360 | if (strcmp (envvar, "TERM") == 0) | |
361 | return xstrdup ("w32console"); | |
362 | /* Found neither in the environment nor in the registry. */ | |
363 | return NULL; | |
364 | } | |
7ce8671d JB |
365 | |
366 | if (dwType == REG_SZ) | |
367 | /* Registry; no need to expand. */ | |
368 | return value; | |
369 | ||
370 | if (dwType == REG_EXPAND_SZ) | |
371 | { | |
372 | DWORD size; | |
373 | ||
374 | if (size = ExpandEnvironmentStrings (value, NULL, 0)) | |
375 | { | |
376 | char *buffer = (char *) xmalloc (size); | |
377 | if (ExpandEnvironmentStrings (value, buffer, size)) | |
378 | { | |
379 | /* Found and expanded. */ | |
380 | free (value); | |
381 | return buffer; | |
382 | } | |
383 | ||
384 | /* Error expanding. */ | |
385 | free (buffer); | |
386 | } | |
387 | } | |
388 | ||
389 | /* Not the right type, or not correctly expanded. */ | |
390 | free (value); | |
391 | return NULL; | |
392 | } | |
393 | ||
ff90fbde | 394 | void |
7c3320d8 | 395 | w32_set_user_model_id (void) |
ff90fbde JR |
396 | { |
397 | HMODULE shell; | |
0a3472c7 | 398 | HRESULT (WINAPI * set_user_model) (wchar_t * id); |
ff90fbde JR |
399 | |
400 | /* On Windows 7 and later, we need to set the user model ID | |
401 | to associate emacsclient launched files with Emacs frames | |
402 | in the UI. */ | |
361358ea | 403 | shell = LoadLibrary ("shell32.dll"); |
ff90fbde JR |
404 | if (shell) |
405 | { | |
406 | set_user_model | |
407 | = (void *) GetProcAddress (shell, | |
408 | "SetCurrentProcessExplicitAppUserModelID"); | |
409 | /* If the function is defined, then we are running on Windows 7 | |
410 | or newer, and the UI uses this to group related windows | |
411 | together. Since emacs, runemacs, emacsclient are related, we | |
412 | want them grouped even though the executables are different, | |
413 | so we need to set a consistent ID between them. */ | |
414 | if (set_user_model) | |
415 | set_user_model (L"GNU.Emacs"); | |
416 | ||
417 | FreeLibrary (shell); | |
418 | } | |
419 | } | |
420 | ||
42073bfb | 421 | int |
7c3320d8 | 422 | w32_window_app (void) |
42073bfb JB |
423 | { |
424 | static int window_app = -1; | |
425 | char szTitle[MAX_PATH]; | |
426 | ||
427 | if (window_app < 0) | |
dbf60b07 JR |
428 | { |
429 | /* Checking for STDOUT does not work; it's a valid handle also in | |
430 | nonconsole apps. Testing for the console title seems to work. */ | |
431 | window_app = (GetConsoleTitleA (szTitle, MAX_PATH) == 0); | |
432 | if (window_app) | |
361358ea | 433 | InitCommonControls (); |
dbf60b07 | 434 | } |
42073bfb JB |
435 | |
436 | return window_app; | |
437 | } | |
105faa84 DN |
438 | |
439 | /* | |
cb06b8dc | 440 | execvp wrapper for Windows. Quotes arguments with embedded spaces. |
105faa84 DN |
441 | |
442 | This is necessary due to the broken implementation of exec* routines in | |
443 | the Microsoft libraries: they concatenate the arguments together without | |
444 | quoting special characters, and pass the result to CreateProcess, with | |
7c3320d8 | 445 | predictably bad results. By contrast, POSIX execvp passes the arguments |
105faa84 DN |
446 | directly into the argv array of the child process. |
447 | */ | |
448 | int | |
7c3320d8 | 449 | w32_execvp (const char *path, char **argv) |
105faa84 DN |
450 | { |
451 | int i; | |
452 | ||
453 | /* Required to allow a .BAT script as alternate editor. */ | |
454 | argv[0] = (char *) alternate_editor; | |
455 | ||
456 | for (i = 0; argv[i]; i++) | |
457 | if (strchr (argv[i], ' ')) | |
458 | { | |
459 | char *quoted = alloca (strlen (argv[i]) + 3); | |
460 | sprintf (quoted, "\"%s\"", argv[i]); | |
461 | argv[i] = quoted; | |
462 | } | |
463 | ||
464 | return execvp (path, argv); | |
465 | } | |
466 | ||
467 | #undef execvp | |
468 | #define execvp w32_execvp | |
469 | ||
d41784ee EZ |
470 | /* Emulation of ttyname for Windows. */ |
471 | char * | |
472 | ttyname (int fd) | |
473 | { | |
474 | return "CONOUT$"; | |
475 | } | |
476 | ||
105faa84 | 477 | #endif /* WINDOWSNT */ |
42073bfb | 478 | |
f387c1ee JB |
479 | /* Display a normal or error message. |
480 | On Windows, use a message box if compiled as a Windows app. */ | |
42073bfb | 481 | void |
988e88ab | 482 | message (int is_error, const char *message, ...) |
42073bfb | 483 | { |
361358ea | 484 | char msg[2048]; |
42073bfb JB |
485 | va_list args; |
486 | ||
487 | va_start (args, message); | |
42073bfb JB |
488 | vsprintf (msg, message, args); |
489 | va_end (args); | |
490 | ||
491 | #ifdef WINDOWSNT | |
492 | if (w32_window_app ()) | |
493 | { | |
494 | if (is_error) | |
495 | MessageBox (NULL, msg, "Emacsclient ERROR", MB_ICONERROR); | |
496 | else | |
497 | MessageBox (NULL, msg, "Emacsclient", MB_ICONINFORMATION); | |
498 | } | |
499 | else | |
500 | #endif | |
9219db75 JB |
501 | { |
502 | FILE *f = is_error ? stderr : stdout; | |
503 | ||
504 | fputs (msg, f); | |
505 | fflush (f); | |
506 | } | |
42073bfb JB |
507 | } |
508 | ||
8f9aaa0a | 509 | /* Decode the options from argv and argc. |
5212210c | 510 | The global variable `optind' will say how many arguments we used up. */ |
8f9aaa0a | 511 | |
5212210c | 512 | void |
873fbd0b | 513 | decode_options (int argc, char **argv) |
8f9aaa0a | 514 | { |
7ce8671d | 515 | alternate_editor = egetenv ("ALTERNATE_EDITOR"); |
0ea5797a | 516 | |
8f9aaa0a RS |
517 | while (1) |
518 | { | |
dc1cd5f7 | 519 | int opt = getopt_long_only (argc, argv, |
b03d27bd | 520 | #ifndef NO_SOCKETS_IN_FILE_SYSTEM |
974b73e8 | 521 | "VHnea:s:f:d:tc", |
b03d27bd | 522 | #else |
974b73e8 | 523 | "VHnea:f:d:tc", |
b03d27bd | 524 | #endif |
974b73e8 | 525 | longopts, 0); |
8f9aaa0a RS |
526 | |
527 | if (opt == EOF) | |
528 | break; | |
529 | ||
530 | switch (opt) | |
531 | { | |
532 | case 0: | |
533 | /* If getopt returns 0, then it has already processed a | |
534 | long-named option. We should do nothing. */ | |
535 | break; | |
e69233c2 | 536 | |
97e3214d GM |
537 | case 'a': |
538 | alternate_editor = optarg; | |
539 | break; | |
e69233c2 | 540 | |
b03d27bd | 541 | #ifndef NO_SOCKETS_IN_FILE_SYSTEM |
254107e4 RS |
542 | case 's': |
543 | socket_name = optarg; | |
544 | break; | |
b03d27bd | 545 | #endif |
254107e4 | 546 | |
aa0b6932 JB |
547 | case 'f': |
548 | server_file = optarg; | |
549 | break; | |
254107e4 | 550 | |
0ea5797a SM |
551 | /* We used to disallow this argument in w32, but it seems better |
552 | to allow it, for the occasional case where the user is | |
553 | connecting with a w32 client to a server compiled with X11 | |
554 | support. */ | |
30be2360 SM |
555 | case 'd': |
556 | display = optarg; | |
557 | break; | |
558 | ||
8f9aaa0a RS |
559 | case 'n': |
560 | nowait = 1; | |
561 | break; | |
562 | ||
30be2360 SM |
563 | case 'e': |
564 | eval = 1; | |
565 | break; | |
566 | ||
8f9aaa0a | 567 | case 'V': |
42073bfb | 568 | message (FALSE, "emacsclient %s\n", VERSION); |
65396510 | 569 | exit (EXIT_SUCCESS); |
8f9aaa0a | 570 | break; |
46cec291 | 571 | |
819b8f00 | 572 | case 't': |
77134727 | 573 | tty = 1; |
c1b8e896 | 574 | current_frame = 0; |
77134727 KL |
575 | break; |
576 | ||
e5299d8d | 577 | case 'c': |
31fa6595 | 578 | current_frame = 0; |
9628b887 | 579 | break; |
0b0d3e0b | 580 | |
0191e222 CY |
581 | case 'p': |
582 | parent_id = optarg; | |
583 | current_frame = 0; | |
584 | break; | |
585 | ||
8f9aaa0a | 586 | case 'H': |
8f9aaa0a | 587 | print_help_and_exit (); |
20c396e8 JB |
588 | break; |
589 | ||
590 | default: | |
42073bfb | 591 | message (TRUE, "Try `%s --help' for more information\n", progname); |
65396510 | 592 | exit (EXIT_FAILURE); |
20c396e8 | 593 | break; |
8f9aaa0a RS |
594 | } |
595 | } | |
9628b887 | 596 | |
273b9028 CY |
597 | /* If the -c option is used (without -t) and no --display argument |
598 | is provided, try $DISPLAY. | |
599 | Without the -c option, we used to set `display' to $DISPLAY by | |
600 | default, but this changed the default behavior and is sometimes | |
601 | inconvenient. So we force users to use "--display $DISPLAY" if | |
602 | they want Emacs to connect to their current display. */ | |
09317bf4 | 603 | if (!current_frame && !tty && !display) |
e7534fc4 AR |
604 | { |
605 | display = egetenv ("DISPLAY"); | |
606 | #ifdef NS_IMPL_COCOA | |
607 | /* Under Cocoa, we don't really use displays the same way as in X, | |
608 | so provide a dummy. */ | |
609 | if (!display || strlen (display) == 0) | |
610 | display = "ns"; | |
611 | #endif | |
612 | } | |
9997dc15 | 613 | |
273b9028 | 614 | /* A null-string display is invalid. */ |
0ea5797a SM |
615 | if (display && strlen (display) == 0) |
616 | display = NULL; | |
617 | ||
273b9028 CY |
618 | /* If no display is available, new frames are tty frames. */ |
619 | if (!current_frame && !display) | |
92071250 | 620 | tty = 1; |
c0f342ab | 621 | |
b8ccaf6f | 622 | /* --no-wait implies --current-frame on ttys when there are file |
273b9028 | 623 | arguments or expressions given. */ |
b8ccaf6f | 624 | if (nowait && tty && argc - optind > 0) |
92071250 | 625 | current_frame = 1; |
802bdb3c DN |
626 | |
627 | #ifdef WINDOWSNT | |
69157c99 | 628 | if (alternate_editor && alternate_editor[0] == '\0') |
802bdb3c DN |
629 | { |
630 | message (TRUE, "--alternate-editor argument or ALTERNATE_EDITOR variable cannot be\n\ | |
631 | an empty string"); | |
632 | exit (EXIT_FAILURE); | |
633 | } | |
634 | #endif /* WINDOWSNT */ | |
8f9aaa0a RS |
635 | } |
636 | ||
974b73e8 | 637 | \f |
7f3bff3e | 638 | void |
873fbd0b | 639 | print_help_and_exit (void) |
8f9aaa0a | 640 | { |
c0f342ab JB |
641 | /* Spaces and tabs are significant in this message; they're chosen so the |
642 | message aligns properly both in a tty and in a Windows message box. | |
643 | Please try to preserve them; otherwise the output is very hard to read | |
644 | when using emacsclientw. */ | |
42073bfb | 645 | message (FALSE, |
974b73e8 | 646 | "Usage: %s [OPTIONS] FILE...\n\ |
30be2360 SM |
647 | Tell the Emacs server to visit the specified files.\n\ |
648 | Every FILE can be either just a FILENAME or [+LINE[:COLUMN]] FILENAME.\n\ | |
20c396e8 | 649 | \n\ |
30be2360 | 650 | The following OPTIONS are accepted:\n\ |
c0f342ab JB |
651 | -V, --version Just print version info and return\n\ |
652 | -H, --help Print this usage information message\n\ | |
dc1cd5f7 | 653 | -nw, -t, --tty Open a new Emacs frame on the current terminal\n\ |
c4b858e3 | 654 | -c, --create-frame Create a new frame instead of trying to\n\ |
9dfda22f | 655 | use the current Emacs frame\n\ |
c0f342ab | 656 | -e, --eval Evaluate the FILE arguments as ELisp expressions\n\ |
d07529f3 | 657 | -n, --no-wait Don't wait for the server to return\n\ |
24d5010d | 658 | -d DISPLAY, --display=DISPLAY\n\ |
0191e222 CY |
659 | Visit the file in the given display\n\ |
660 | --parent-id=ID Open in parent window ID, via XEmbed\n" | |
aa0b6932 | 661 | #ifndef NO_SOCKETS_IN_FILE_SYSTEM |
24d5010d | 662 | "-s SOCKET, --socket-name=SOCKET\n\ |
9dfda22f | 663 | Set filename of the UNIX socket for communication\n" |
aa0b6932 | 664 | #endif |
24d5010d | 665 | "-f SERVER, --server-file=SERVER\n\ |
9dfda22f | 666 | Set filename of the TCP authentication file\n\ |
24d5010d | 667 | -a EDITOR, --alternate-editor=EDITOR\n\ |
9dfda22f | 668 | Editor to fallback to if the server is not running\n" |
6133a1a9 | 669 | #ifndef WINDOWSNT |
c3f995a2 JB |
670 | " If EDITOR is the empty string, start Emacs in daemon\n\ |
671 | mode and try connecting again\n" | |
6133a1a9 | 672 | #endif /* not WINDOWSNT */ |
c3f995a2 | 673 | "\n\ |
5f54cae6 | 674 | Report bugs with M-x report-emacs-bug.\n", progname); |
65396510 | 675 | exit (EXIT_SUCCESS); |
8f9aaa0a | 676 | } |
5212210c | 677 | |
aa0b6932 JB |
678 | /* |
679 | Try to run a different command, or --if no alternate editor is | |
680 | defined-- exit with an errorcode. | |
cb06b8dc | 681 | Uses argv, but gets it from the global variable main_argv. |
aa0b6932 JB |
682 | */ |
683 | void | |
974b73e8 | 684 | fail (void) |
9002956f | 685 | { |
aa0b6932 | 686 | if (alternate_editor) |
9002956f | 687 | { |
aa0b6932 | 688 | int i = optind - 1; |
4472aef4 | 689 | |
974b73e8 | 690 | execvp (alternate_editor, main_argv + i); |
42073bfb | 691 | message (TRUE, "%s: error executing alternate editor \"%s\"\n", |
974b73e8 | 692 | progname, alternate_editor); |
9002956f | 693 | } |
aa0b6932 | 694 | exit (EXIT_FAILURE); |
9002956f KL |
695 | } |
696 | ||
aa0b6932 | 697 | \f |
1e7823d0 | 698 | #if !defined (HAVE_SOCKETS) || !defined (HAVE_INET_SOCKETS) |
9002956f | 699 | |
aa0b6932 | 700 | int |
0613f5d5 | 701 | main (int argc, char **argv) |
9002956f | 702 | { |
974b73e8 KL |
703 | main_argv = argv; |
704 | progname = argv[0]; | |
705 | message (TRUE, "%s: Sorry, the Emacs server is supported only\n" | |
c0f342ab | 706 | "on systems with Berkeley sockets.\n", |
aa0b6932 | 707 | argv[0]); |
974b73e8 | 708 | fail (); |
9002956f KL |
709 | } |
710 | ||
1e7823d0 | 711 | #else /* HAVE_SOCKETS && HAVE_INET_SOCKETS */ |
2828d5f9 | 712 | |
aa0b6932 JB |
713 | #define AUTH_KEY_LENGTH 64 |
714 | #define SEND_BUFFER_SIZE 4096 | |
715 | ||
873fbd0b | 716 | extern char *strerror (int); |
aa0b6932 JB |
717 | |
718 | /* Buffer to accumulate data to send in TCP connections. */ | |
719 | char send_buffer[SEND_BUFFER_SIZE + 1]; | |
720 | int sblen = 0; /* Fill pointer for the send buffer. */ | |
4b7b77f6 JR |
721 | /* Socket used to communicate with the Emacs server process. */ |
722 | HSOCKET emacs_socket = 0; | |
aa0b6932 | 723 | |
d22b00e5 JR |
724 | /* On Windows, the socket library was historically separate from the standard |
725 | C library, so errors are handled differently. */ | |
726 | void | |
988e88ab | 727 | sock_err_message (const char *function_name) |
d22b00e5 JR |
728 | { |
729 | #ifdef WINDOWSNT | |
730 | char* msg = NULL; | |
731 | ||
732 | FormatMessage (FORMAT_MESSAGE_FROM_SYSTEM | |
733 | | FORMAT_MESSAGE_ALLOCATE_BUFFER | |
734 | | FORMAT_MESSAGE_ARGUMENT_ARRAY, | |
735 | NULL, WSAGetLastError (), 0, (LPTSTR)&msg, 0, NULL); | |
736 | ||
737 | message (TRUE, "%s: %s: %s\n", progname, function_name, msg); | |
738 | ||
739 | LocalFree (msg); | |
740 | #else | |
741 | message (TRUE, "%s: %s: %s\n", progname, function_name, strerror (errno)); | |
742 | #endif | |
743 | } | |
744 | ||
745 | ||
aa0b6932 JB |
746 | /* Let's send the data to Emacs when either |
747 | - the data ends in "\n", or | |
748 | - the buffer is full (but this shouldn't happen) | |
749 | Otherwise, we just accumulate it. */ | |
b03d27bd | 750 | void |
988e88ab | 751 | send_to_emacs (HSOCKET s, const char *data) |
aa0b6932 JB |
752 | { |
753 | while (data) | |
2828d5f9 | 754 | { |
aa0b6932 JB |
755 | int dlen = strlen (data); |
756 | if (dlen + sblen >= SEND_BUFFER_SIZE) | |
757 | { | |
758 | int part = SEND_BUFFER_SIZE - sblen; | |
759 | strncpy (&send_buffer[sblen], data, part); | |
760 | data += part; | |
761 | sblen = SEND_BUFFER_SIZE; | |
762 | } | |
763 | else if (dlen) | |
764 | { | |
765 | strcpy (&send_buffer[sblen], data); | |
766 | data = NULL; | |
767 | sblen += dlen; | |
768 | } | |
769 | else | |
770 | break; | |
771 | ||
772 | if (sblen == SEND_BUFFER_SIZE | |
773 | || (sblen > 0 && send_buffer[sblen-1] == '\n')) | |
774 | { | |
775 | int sent = send (s, send_buffer, sblen, 0); | |
776 | if (sent != sblen) | |
777 | strcpy (send_buffer, &send_buffer[sent]); | |
778 | sblen -= sent; | |
779 | } | |
2828d5f9 | 780 | } |
2828d5f9 | 781 | } |
2828d5f9 KL |
782 | |
783 | \f | |
0b0d3e0b | 784 | /* In STR, insert a & before each &, each space, each newline, and |
a4cf2096 | 785 | any initial -. Change spaces to underscores, too, so that the |
0b0d3e0b KL |
786 | return value never contains a space. |
787 | ||
3a35a84c | 788 | Does not change the string. Outputs the result to S. */ |
87209357 | 789 | void |
988e88ab | 790 | quote_argument (HSOCKET s, const char *str) |
5212210c | 791 | { |
9002956f | 792 | char *copy = (char *) xmalloc (strlen (str) * 2 + 1); |
988e88ab J |
793 | const char *p; |
794 | char *q; | |
5212210c | 795 | |
0b0d3e0b | 796 | p = str; |
5212210c RS |
797 | q = copy; |
798 | while (*p) | |
799 | { | |
800 | if (*p == ' ') | |
801 | { | |
f1db6a73 | 802 | *q++ = '&'; |
5212210c RS |
803 | *q++ = '_'; |
804 | p++; | |
805 | } | |
3cf8c6aa SM |
806 | else if (*p == '\n') |
807 | { | |
808 | *q++ = '&'; | |
809 | *q++ = 'n'; | |
810 | p++; | |
811 | } | |
5212210c RS |
812 | else |
813 | { | |
0b0d3e0b | 814 | if (*p == '&' || (*p == '-' && p == str)) |
f1db6a73 | 815 | *q++ = '&'; |
5212210c RS |
816 | *q++ = *p++; |
817 | } | |
818 | } | |
f1db6a73 | 819 | *q++ = 0; |
5212210c | 820 | |
486ba65f | 821 | send_to_emacs (s, copy); |
87209357 EZ |
822 | |
823 | free (copy); | |
5212210c | 824 | } |
0c76956f | 825 | |
0b0d3e0b KL |
826 | |
827 | /* The inverse of quote_argument. Removes quoting in string STR by | |
828 | modifying the string in place. Returns STR. */ | |
829 | ||
830 | char * | |
873fbd0b | 831 | unquote_argument (char *str) |
0b0d3e0b KL |
832 | { |
833 | char *p, *q; | |
834 | ||
835 | if (! str) | |
836 | return str; | |
837 | ||
838 | p = str; | |
839 | q = str; | |
840 | while (*p) | |
841 | { | |
842 | if (*p == '&') | |
843 | { | |
844 | p++; | |
845 | if (*p == '&') | |
846 | *p = '&'; | |
847 | else if (*p == '_') | |
848 | *p = ' '; | |
849 | else if (*p == 'n') | |
850 | *p = '\n'; | |
851 | else if (*p == '-') | |
852 | *p = '-'; | |
853 | } | |
854 | *q++ = *p++; | |
855 | } | |
856 | *q = 0; | |
857 | return str; | |
858 | } | |
859 | ||
8f9aaa0a | 860 | \f |
b03d27bd | 861 | int |
873fbd0b | 862 | file_name_absolute_p (const unsigned char *filename) |
b03d27bd JB |
863 | { |
864 | /* Sanity check, it shouldn't happen. */ | |
865 | if (! filename) return FALSE; | |
866 | ||
867 | /* /xxx is always an absolute path. */ | |
868 | if (filename[0] == '/') return TRUE; | |
869 | ||
870 | /* Empty filenames (which shouldn't happen) are relative. */ | |
871 | if (filename[0] == '\0') return FALSE; | |
872 | ||
873 | #ifdef WINDOWSNT | |
71b8f735 | 874 | /* X:\xxx is always absolute. */ |
5f7a4874 | 875 | if (isalpha (filename[0]) |
cb0297bb | 876 | && filename[1] == ':' && (filename[2] == '\\' || filename[2] == '/')) |
b03d27bd JB |
877 | return TRUE; |
878 | ||
879 | /* Both \xxx and \\xxx\yyy are absolute. */ | |
880 | if (filename[0] == '\\') return TRUE; | |
881 | #endif | |
882 | ||
883 | return FALSE; | |
884 | } | |
885 | ||
aa0b6932 | 886 | #ifdef WINDOWSNT |
f0384499 | 887 | /* Wrapper to make WSACleanup a cdecl, as required by atexit. */ |
7c3320d8 JB |
888 | void __cdecl |
889 | close_winsock (void) | |
aa0b6932 JB |
890 | { |
891 | WSACleanup (); | |
892 | } | |
0c76956f | 893 | |
b03d27bd JB |
894 | /* Initialize the WinSock2 library. */ |
895 | void | |
7c3320d8 | 896 | initialize_sockets (void) |
0c76956f | 897 | { |
aa0b6932 JB |
898 | WSADATA wsaData; |
899 | ||
aa0b6932 JB |
900 | if (WSAStartup (MAKEWORD (2, 0), &wsaData)) |
901 | { | |
78da39c6 | 902 | message (TRUE, "%s: error initializing WinSock2\n", progname); |
aa0b6932 JB |
903 | exit (EXIT_FAILURE); |
904 | } | |
905 | ||
906 | atexit (close_winsock); | |
0c76956f | 907 | } |
e35fc962 | 908 | #endif /* WINDOWSNT */ |
974b73e8 | 909 | |
8f9aaa0a | 910 | \f |
97e3214d | 911 | /* |
aa0b6932 | 912 | * Read the information needed to set up a TCP comm channel with |
434a6c5d | 913 | * the Emacs server: host, port, pid and authentication string. |
0e0dced5 | 914 | */ |
b03d27bd | 915 | int |
873fbd0b | 916 | get_server_config (struct sockaddr_in *server, char *authentication) |
97e3214d | 917 | { |
aa0b6932 JB |
918 | char dotted[32]; |
919 | char *port; | |
434a6c5d | 920 | char *pid; |
b03d27bd | 921 | FILE *config = NULL; |
aa0b6932 | 922 | |
b03d27bd JB |
923 | if (file_name_absolute_p (server_file)) |
924 | config = fopen (server_file, "rb"); | |
925 | else | |
97e3214d | 926 | { |
7ce8671d | 927 | char *home = egetenv ("HOME"); |
88b46d84 | 928 | |
aa0b6932 JB |
929 | if (home) |
930 | { | |
bc558f3e JB |
931 | char *path = alloca (strlen (home) + strlen (server_file) |
932 | + EXTRA_SPACE); | |
aa0b6932 JB |
933 | sprintf (path, "%s/.emacs.d/server/%s", home, server_file); |
934 | config = fopen (path, "rb"); | |
935 | } | |
88b46d84 | 936 | #ifdef WINDOWSNT |
7ce8671d | 937 | if (!config && (home = egetenv ("APPDATA"))) |
88b46d84 | 938 | { |
bc558f3e JB |
939 | char *path = alloca (strlen (home) + strlen (server_file) |
940 | + EXTRA_SPACE); | |
88b46d84 JB |
941 | sprintf (path, "%s/.emacs.d/server/%s", home, server_file); |
942 | config = fopen (path, "rb"); | |
943 | } | |
944 | #endif | |
aa0b6932 JB |
945 | } |
946 | ||
947 | if (! config) | |
948 | return FALSE; | |
949 | ||
950 | if (fgets (dotted, sizeof dotted, config) | |
434a6c5d JB |
951 | && (port = strchr (dotted, ':')) |
952 | && (pid = strchr (port, ' '))) | |
aa0b6932 JB |
953 | { |
954 | *port++ = '\0'; | |
434a6c5d | 955 | *pid++ = '\0'; |
97e3214d GM |
956 | } |
957 | else | |
958 | { | |
78da39c6 | 959 | message (TRUE, "%s: invalid configuration info\n", progname); |
65396510 | 960 | exit (EXIT_FAILURE); |
97e3214d | 961 | } |
97e3214d | 962 | |
aa0b6932 JB |
963 | server->sin_family = AF_INET; |
964 | server->sin_addr.s_addr = inet_addr (dotted); | |
965 | server->sin_port = htons (atoi (port)); | |
97e3214d | 966 | |
aa0b6932 JB |
967 | if (! fread (authentication, AUTH_KEY_LENGTH, 1, config)) |
968 | { | |
78da39c6 | 969 | message (TRUE, "%s: cannot read authentication info\n", progname); |
aa0b6932 JB |
970 | exit (EXIT_FAILURE); |
971 | } | |
46cec291 | 972 | |
aa0b6932 | 973 | fclose (config); |
97e3214d | 974 | |
c66648e0 | 975 | emacs_pid = atoi (pid); |
434a6c5d | 976 | |
aa0b6932 | 977 | return TRUE; |
97e3214d GM |
978 | } |
979 | ||
aa0b6932 | 980 | HSOCKET |
873fbd0b | 981 | set_tcp_socket (void) |
aa0b6932 JB |
982 | { |
983 | HSOCKET s; | |
984 | struct sockaddr_in server; | |
aa0b6932 JB |
985 | struct linger l_arg = {1, 1}; |
986 | char auth_string[AUTH_KEY_LENGTH + 1]; | |
9628b887 | 987 | |
aa0b6932 JB |
988 | if (! get_server_config (&server, auth_string)) |
989 | return INVALID_SOCKET; | |
990 | ||
b03d27bd | 991 | if (server.sin_addr.s_addr != inet_addr ("127.0.0.1")) |
9219db75 | 992 | message (FALSE, "%s: connected to remote socket at %s\n", |
b03d27bd JB |
993 | progname, inet_ntoa (server.sin_addr)); |
994 | ||
aa0b6932 JB |
995 | /* |
996 | * Open up an AF_INET socket | |
997 | */ | |
998 | if ((s = socket (AF_INET, SOCK_STREAM, IPPROTO_TCP)) < 0) | |
999 | { | |
d22b00e5 | 1000 | sock_err_message ("socket"); |
aa0b6932 JB |
1001 | return INVALID_SOCKET; |
1002 | } | |
1003 | ||
1004 | /* | |
1005 | * Set up the socket | |
1006 | */ | |
1007 | if (connect (s, (struct sockaddr *) &server, sizeof server) < 0) | |
1008 | { | |
d22b00e5 | 1009 | sock_err_message ("connect"); |
aa0b6932 JB |
1010 | return INVALID_SOCKET; |
1011 | } | |
1012 | ||
aa0b6932 JB |
1013 | setsockopt (s, SOL_SOCKET, SO_LINGER, (char *) &l_arg, sizeof l_arg); |
1014 | ||
1015 | /* | |
1016 | * Send the authentication | |
1017 | */ | |
1018 | auth_string[AUTH_KEY_LENGTH] = '\0'; | |
1019 | ||
486ba65f JR |
1020 | send_to_emacs (s, "-auth "); |
1021 | send_to_emacs (s, auth_string); | |
5ab73228 | 1022 | send_to_emacs (s, " "); |
aa0b6932 JB |
1023 | |
1024 | return s; | |
1025 | } | |
1026 | ||
b2ff54a0 JR |
1027 | |
1028 | /* Returns 1 if PREFIX is a prefix of STRING. */ | |
1029 | static int | |
988e88ab | 1030 | strprefix (const char *prefix, const char *string) |
b2ff54a0 | 1031 | { |
cb06b8dc | 1032 | return !strncmp (prefix, string, strlen (prefix)); |
b2ff54a0 JR |
1033 | } |
1034 | ||
a336ee5b CY |
1035 | /* Get tty name and type. If successful, return the type in TTY_TYPE |
1036 | and the name in TTY_NAME, and return 1. Otherwise, fail if NOABORT | |
1037 | is zero, or return 0 if NOABORT is non-zero. */ | |
1038 | ||
1039 | int | |
1040 | find_tty (char **tty_type, char **tty_name, int noabort) | |
1041 | { | |
1042 | char *type = egetenv ("TERM"); | |
1043 | char *name = ttyname (fileno (stdout)); | |
1044 | ||
1045 | if (!name) | |
1046 | { | |
1047 | if (noabort) | |
1048 | return 0; | |
1049 | else | |
1050 | { | |
1051 | message (TRUE, "%s: could not get terminal name\n", progname); | |
1052 | fail (); | |
1053 | } | |
1054 | } | |
1055 | ||
1056 | if (!type) | |
1057 | { | |
1058 | if (noabort) | |
1059 | return 0; | |
1060 | else | |
1061 | { | |
1062 | message (TRUE, "%s: please set the TERM variable to your terminal type\n", | |
1063 | progname); | |
1064 | fail (); | |
1065 | } | |
1066 | } | |
1067 | ||
1068 | if (strcmp (type, "eterm") == 0) | |
1069 | { | |
1070 | if (noabort) | |
1071 | return 0; | |
1072 | else | |
1073 | { | |
1074 | /* This causes nasty, MULTI_KBOARD-related input lockouts. */ | |
1075 | message (TRUE, "%s: opening a frame in an Emacs term buffer" | |
1076 | " is not supported\n", progname); | |
1077 | fail (); | |
1078 | } | |
1079 | } | |
1080 | ||
1081 | *tty_name = name; | |
1082 | *tty_type = type; | |
1083 | return 1; | |
1084 | } | |
1085 | ||
b2ff54a0 | 1086 | |
aa0b6932 | 1087 | #if !defined (NO_SOCKETS_IN_FILE_SYSTEM) |
46cec291 | 1088 | |
9f637eea GM |
1089 | /* Three possibilities: |
1090 | 2 - can't be `stat'ed (sets errno) | |
1091 | 1 - isn't owned by us | |
1092 | 0 - success: none of the above */ | |
1093 | ||
1094 | static int | |
873fbd0b | 1095 | socket_status (char *socket_name) |
9f637eea GM |
1096 | { |
1097 | struct stat statbfr; | |
1098 | ||
1099 | if (stat (socket_name, &statbfr) == -1) | |
1100 | return 2; | |
1101 | ||
1102 | if (statbfr.st_uid != geteuid ()) | |
1103 | return 1; | |
0b0d3e0b | 1104 | |
9f637eea GM |
1105 | return 0; |
1106 | } | |
1107 | ||
974b73e8 | 1108 | \f |
da8e1115 KL |
1109 | /* A signal handler that passes the signal to the Emacs process. |
1110 | Useful for SIGWINCH. */ | |
1111 | ||
9628b887 | 1112 | SIGTYPE |
428a555e | 1113 | pass_signal_to_emacs (int signalnum) |
9628b887 KL |
1114 | { |
1115 | int old_errno = errno; | |
1116 | ||
9f729af5 | 1117 | if (emacs_pid) |
428a555e | 1118 | kill (emacs_pid, signalnum); |
9f729af5 | 1119 | |
428a555e | 1120 | signal (signalnum, pass_signal_to_emacs); |
9f729af5 KL |
1121 | errno = old_errno; |
1122 | } | |
1123 | ||
0b0d3e0b KL |
1124 | /* Signal handler for SIGCONT; notify the Emacs process that it can |
1125 | now resume our tty frame. */ | |
1126 | ||
1127 | SIGTYPE | |
1128 | handle_sigcont (int signalnum) | |
1129 | { | |
1130 | int old_errno = errno; | |
1131 | ||
1132 | if (tcgetpgrp (1) == getpgrp ()) | |
1133 | { | |
1134 | /* We are in the foreground. */ | |
486ba65f | 1135 | send_to_emacs (emacs_socket, "-resume \n"); |
0b0d3e0b KL |
1136 | } |
1137 | else | |
1138 | { | |
1139 | /* We are in the background; cancel the continue. */ | |
1140 | kill (getpid (), SIGSTOP); | |
1141 | } | |
c6c53c3e KL |
1142 | |
1143 | signal (signalnum, handle_sigcont); | |
0b0d3e0b KL |
1144 | errno = old_errno; |
1145 | } | |
1146 | ||
1147 | /* Signal handler for SIGTSTP; notify the Emacs process that we are | |
1148 | going to sleep. Normally the suspend is initiated by Emacs via | |
1149 | server-handle-suspend-tty, but if the server gets out of sync with | |
1150 | reality, we may get a SIGTSTP on C-z. Handling this signal and | |
1151 | notifying Emacs about it should get things under control again. */ | |
1152 | ||
1153 | SIGTYPE | |
1154 | handle_sigtstp (int signalnum) | |
1155 | { | |
1156 | int old_errno = errno; | |
1157 | sigset_t set; | |
c0f342ab | 1158 | |
90843190 | 1159 | if (emacs_socket) |
486ba65f | 1160 | send_to_emacs (emacs_socket, "-suspend \n"); |
0b0d3e0b | 1161 | |
5ab73228 | 1162 | /* Unblock this signal and call the default handler by temporarily |
0b0d3e0b KL |
1163 | changing the handler and resignalling. */ |
1164 | sigprocmask (SIG_BLOCK, NULL, &set); | |
1165 | sigdelset (&set, signalnum); | |
1166 | signal (signalnum, SIG_DFL); | |
1167 | kill (getpid (), signalnum); | |
1168 | sigprocmask (SIG_SETMASK, &set, NULL); /* Let's the above signal through. */ | |
1169 | signal (signalnum, handle_sigtstp); | |
1170 | ||
1171 | errno = old_errno; | |
1172 | } | |
273b9028 CY |
1173 | |
1174 | ||
da8e1115 | 1175 | /* Set up signal handlers before opening a frame on the current tty. */ |
0b0d3e0b | 1176 | |
4d553a13 KL |
1177 | void |
1178 | init_signals (void) | |
9628b887 KL |
1179 | { |
1180 | /* Set up signal handlers. */ | |
428a555e | 1181 | signal (SIGWINCH, pass_signal_to_emacs); |
4ca927b4 KL |
1182 | |
1183 | /* Don't pass SIGINT and SIGQUIT to Emacs, because it has no way of | |
1184 | deciding which terminal the signal came from. C-g is now a | |
1185 | normal input event on secondary terminals. */ | |
1186 | #if 0 | |
428a555e KL |
1187 | signal (SIGINT, pass_signal_to_emacs); |
1188 | signal (SIGQUIT, pass_signal_to_emacs); | |
4ca927b4 | 1189 | #endif |
0b0d3e0b KL |
1190 | |
1191 | signal (SIGCONT, handle_sigcont); | |
1192 | signal (SIGTSTP, handle_sigtstp); | |
1193 | signal (SIGTTOU, handle_sigtstp); | |
9628b887 KL |
1194 | } |
1195 | ||
46cec291 | 1196 | |
aa0b6932 | 1197 | HSOCKET |
873fbd0b | 1198 | set_local_socket (void) |
46cec291 | 1199 | { |
aa0b6932 | 1200 | HSOCKET s; |
46cec291 | 1201 | struct sockaddr_un server; |
46cec291 | 1202 | |
e69233c2 | 1203 | /* |
46cec291 RS |
1204 | * Open up an AF_UNIX socket in this person's home directory |
1205 | */ | |
1206 | ||
1207 | if ((s = socket (AF_UNIX, SOCK_STREAM, 0)) < 0) | |
1208 | { | |
42073bfb | 1209 | message (TRUE, "%s: socket: %s\n", progname, strerror (errno)); |
aa0b6932 | 1210 | return INVALID_SOCKET; |
46cec291 | 1211 | } |
e69233c2 | 1212 | |
46cec291 | 1213 | server.sun_family = AF_UNIX; |
c5fee545 | 1214 | |
c5fee545 | 1215 | { |
9f637eea | 1216 | int sock_status = 0; |
5c9659d3 | 1217 | int default_sock = !socket_name; |
b80bf66e | 1218 | int saved_errno = 0; |
988e88ab J |
1219 | const char *server_name = "server"; |
1220 | const char *tmpdir; | |
0b0d3e0b | 1221 | |
8966b757 AS |
1222 | if (socket_name && !strchr (socket_name, '/') |
1223 | && !strchr (socket_name, '\\')) | |
1224 | { | |
1225 | /* socket_name is a file name component. */ | |
d3a6748c KL |
1226 | server_name = socket_name; |
1227 | socket_name = NULL; | |
1228 | default_sock = 1; /* Try both UIDs. */ | |
0734b0d0 | 1229 | } |
efb859b4 | 1230 | |
5c9659d3 | 1231 | if (default_sock) |
254107e4 | 1232 | { |
f77b11a0 JB |
1233 | tmpdir = egetenv ("TMPDIR"); |
1234 | if (!tmpdir) | |
1235 | tmpdir = "/tmp"; | |
bc558f3e JB |
1236 | socket_name = alloca (strlen (tmpdir) + strlen (server_name) |
1237 | + EXTRA_SPACE); | |
f77b11a0 JB |
1238 | sprintf (socket_name, "%s/emacs%d/%s", |
1239 | tmpdir, (int) geteuid (), server_name); | |
254107e4 RS |
1240 | } |
1241 | ||
1242 | if (strlen (socket_name) < sizeof (server.sun_path)) | |
1243 | strcpy (server.sun_path, socket_name); | |
1244 | else | |
819b8f00 | 1245 | { |
78da39c6 | 1246 | message (TRUE, "%s: socket-name %s too long\n", |
974b73e8 | 1247 | progname, socket_name); |
819b8f00 KL |
1248 | fail (); |
1249 | } | |
efb859b4 | 1250 | |
9f637eea GM |
1251 | /* See if the socket exists, and if it's owned by us. */ |
1252 | sock_status = socket_status (server.sun_path); | |
152b6e83 | 1253 | saved_errno = errno; |
5c9659d3 | 1254 | if (sock_status && default_sock) |
efb859b4 | 1255 | { |
9f637eea GM |
1256 | /* Failing that, see if LOGNAME or USER exist and differ from |
1257 | our euid. If so, look for a socket based on the UID | |
1258 | associated with the name. This is reminiscent of the logic | |
1259 | that init_editfns uses to set the global Vuser_full_name. */ | |
e69233c2 | 1260 | |
7ce8671d | 1261 | char *user_name = (char *) egetenv ("LOGNAME"); |
293f9f2a | 1262 | |
9f637eea | 1263 | if (!user_name) |
7ce8671d | 1264 | user_name = (char *) egetenv ("USER"); |
e69233c2 | 1265 | |
9f637eea GM |
1266 | if (user_name) |
1267 | { | |
1268 | struct passwd *pw = getpwnam (user_name); | |
293f9f2a | 1269 | |
9f637eea GM |
1270 | if (pw && (pw->pw_uid != geteuid ())) |
1271 | { | |
1272 | /* We're running under su, apparently. */ | |
bc558f3e JB |
1273 | socket_name = alloca (strlen (tmpdir) + strlen (server_name) |
1274 | + EXTRA_SPACE); | |
f77b11a0 JB |
1275 | sprintf (socket_name, "%s/emacs%d/%s", |
1276 | tmpdir, (int) pw->pw_uid, server_name); | |
5c9659d3 SM |
1277 | |
1278 | if (strlen (socket_name) < sizeof (server.sun_path)) | |
1279 | strcpy (server.sun_path, socket_name); | |
1280 | else | |
1281 | { | |
78da39c6 | 1282 | message (TRUE, "%s: socket-name %s too long\n", |
aa0b6932 | 1283 | progname, socket_name); |
65396510 | 1284 | exit (EXIT_FAILURE); |
5c9659d3 SM |
1285 | } |
1286 | ||
9f637eea | 1287 | sock_status = socket_status (server.sun_path); |
b80bf66e | 1288 | saved_errno = errno; |
9f637eea | 1289 | } |
293f9f2a RS |
1290 | else |
1291 | errno = saved_errno; | |
9f637eea | 1292 | } |
efb859b4 | 1293 | } |
e69233c2 | 1294 | |
aa0b6932 JB |
1295 | switch (sock_status) |
1296 | { | |
1297 | case 1: | |
974b73e8 KL |
1298 | /* There's a socket, but it isn't owned by us. This is OK if |
1299 | we are root. */ | |
1300 | if (0 != geteuid ()) | |
1301 | { | |
1302 | message (TRUE, "%s: Invalid socket owner\n", progname); | |
aa0b6932 | 1303 | return INVALID_SOCKET; |
974b73e8 KL |
1304 | } |
1305 | break; | |
aa0b6932 JB |
1306 | |
1307 | case 2: | |
974b73e8 KL |
1308 | /* `stat' failed */ |
1309 | if (saved_errno == ENOENT) | |
1310 | message (TRUE, | |
1311 | "%s: can't find socket; have you started the server?\n\ | |
45adde32 | 1312 | To start the server in Emacs, type \"M-x server-start\".\n", |
aa0b6932 | 1313 | progname); |
974b73e8 KL |
1314 | else |
1315 | message (TRUE, "%s: can't stat %s: %s\n", | |
aa0b6932 | 1316 | progname, server.sun_path, strerror (saved_errno)); |
974b73e8 | 1317 | return INVALID_SOCKET; |
aa0b6932 | 1318 | } |
efb859b4 | 1319 | } |
46cec291 | 1320 | |
4e23f2ba JB |
1321 | if (connect (s, (struct sockaddr *) &server, strlen (server.sun_path) + 2) |
1322 | < 0) | |
46cec291 | 1323 | { |
42073bfb | 1324 | message (TRUE, "%s: connect: %s\n", progname, strerror (errno)); |
aa0b6932 | 1325 | return INVALID_SOCKET; |
46cec291 | 1326 | } |
23a7488d | 1327 | |
aa0b6932 JB |
1328 | return s; |
1329 | } | |
1330 | #endif /* ! NO_SOCKETS_IN_FILE_SYSTEM */ | |
1331 | ||
1332 | HSOCKET | |
636b507b | 1333 | set_socket (int no_exit_if_error) |
aa0b6932 | 1334 | { |
b03d27bd | 1335 | HSOCKET s; |
c0f342ab | 1336 | |
b03d27bd | 1337 | INITIALIZE (); |
c0f342ab | 1338 | |
aa0b6932 | 1339 | #ifndef NO_SOCKETS_IN_FILE_SYSTEM |
b03d27bd JB |
1340 | /* Explicit --socket-name argument. */ |
1341 | if (socket_name) | |
46cec291 | 1342 | { |
b03d27bd | 1343 | s = set_local_socket (); |
636b507b | 1344 | if ((s != INVALID_SOCKET) || no_exit_if_error) |
974b73e8 | 1345 | return s; |
355a326e | 1346 | message (TRUE, "%s: error accessing socket \"%s\"\n", |
974b73e8 | 1347 | progname, socket_name); |
b03d27bd | 1348 | exit (EXIT_FAILURE); |
46cec291 | 1349 | } |
b03d27bd JB |
1350 | #endif |
1351 | ||
1352 | /* Explicit --server-file arg or EMACS_SERVER_FILE variable. */ | |
1353 | if (!server_file) | |
7ce8671d | 1354 | server_file = egetenv ("EMACS_SERVER_FILE"); |
46cec291 | 1355 | |
b03d27bd | 1356 | if (server_file) |
23a7488d | 1357 | { |
b03d27bd | 1358 | s = set_tcp_socket (); |
636b507b | 1359 | if ((s != INVALID_SOCKET) || no_exit_if_error) |
974b73e8 | 1360 | return s; |
c0f342ab | 1361 | |
78da39c6 | 1362 | message (TRUE, "%s: error accessing server file \"%s\"\n", |
974b73e8 | 1363 | progname, server_file); |
b03d27bd | 1364 | exit (EXIT_FAILURE); |
23a7488d | 1365 | } |
c0f342ab | 1366 | |
b03d27bd JB |
1367 | #ifndef NO_SOCKETS_IN_FILE_SYSTEM |
1368 | /* Implicit local socket. */ | |
1369 | s = set_local_socket (); | |
1370 | if (s != INVALID_SOCKET) | |
1371 | return s; | |
1372 | #endif | |
23a7488d | 1373 | |
b03d27bd JB |
1374 | /* Implicit server file. */ |
1375 | server_file = "server"; | |
1376 | s = set_tcp_socket (); | |
636b507b | 1377 | if ((s != INVALID_SOCKET) || no_exit_if_error) |
b03d27bd JB |
1378 | return s; |
1379 | ||
1380 | /* No implicit or explicit socket, and no alternate editor. */ | |
42073bfb | 1381 | message (TRUE, "%s: No socket or alternate editor. Please use:\n\n" |
b03d27bd JB |
1382 | #ifndef NO_SOCKETS_IN_FILE_SYSTEM |
1383 | "\t--socket-name\n" | |
ee6a193c | 1384 | #endif |
b03d27bd JB |
1385 | "\t--server-file (or environment variable EMACS_SERVER_FILE)\n\ |
1386 | \t--alternate-editor (or environment variable ALTERNATE_EDITOR)\n", | |
1387 | progname); | |
1388 | exit (EXIT_FAILURE); | |
aa0b6932 | 1389 | } |
46cec291 | 1390 | |
0e0dced5 JB |
1391 | #ifdef WINDOWSNT |
1392 | FARPROC set_fg; /* Pointer to AllowSetForegroundWindow. */ | |
1393 | FARPROC get_wc; /* Pointer to RealGetWindowClassA. */ | |
1394 | ||
1395 | BOOL CALLBACK | |
7c3320d8 | 1396 | w32_find_emacs_process (HWND hWnd, LPARAM lParam) |
0e0dced5 JB |
1397 | { |
1398 | DWORD pid; | |
1399 | char class[6]; | |
1400 | ||
1401 | /* Reject any window not of class "Emacs". */ | |
1402 | if (! get_wc (hWnd, class, sizeof (class)) | |
1403 | || strcmp (class, "Emacs")) | |
1404 | return TRUE; | |
1405 | ||
1406 | /* We only need the process id, not the thread id. */ | |
1407 | (void) GetWindowThreadProcessId (hWnd, &pid); | |
1408 | ||
1409 | /* Not the one we're looking for. */ | |
1410 | if (pid != (DWORD) emacs_pid) return TRUE; | |
1411 | ||
1412 | /* OK, let's raise it. */ | |
1413 | set_fg (emacs_pid); | |
1414 | ||
1415 | /* Stop enumeration. */ | |
1416 | return FALSE; | |
1417 | } | |
1418 | ||
1419 | /* | |
1420 | * Search for a window of class "Emacs" and owned by a process with | |
1421 | * process id = emacs_pid. If found, allow it to grab the focus. | |
1422 | */ | |
1423 | void | |
7c3320d8 | 1424 | w32_give_focus (void) |
0e0dced5 | 1425 | { |
ff90fbde | 1426 | HANDLE user32; |
0e0dced5 | 1427 | |
71b8f735 | 1428 | /* It shouldn't happen when dealing with TCP sockets. */ |
0e0dced5 JB |
1429 | if (!emacs_pid) return; |
1430 | ||
ff90fbde JR |
1431 | user32 = GetModuleHandle ("user32.dll"); |
1432 | ||
1433 | if (!user32) | |
1434 | return; | |
0e0dced5 JB |
1435 | |
1436 | /* Modern Windows restrict which processes can set the foreground window. | |
1437 | emacsclient can allow Emacs to grab the focus by calling the function | |
1438 | AllowSetForegroundWindow. Unfortunately, older Windows (W95, W98 and | |
1439 | NT) lack this function, so we have to check its availability. */ | |
ff90fbde JR |
1440 | if ((set_fg = GetProcAddress (user32, "AllowSetForegroundWindow")) |
1441 | && (get_wc = GetProcAddress (user32, "RealGetWindowClassA"))) | |
0e0dced5 | 1442 | EnumWindows (w32_find_emacs_process, (LPARAM) 0); |
0e0dced5 JB |
1443 | } |
1444 | #endif | |
1445 | ||
636b507b DN |
1446 | /* Start the emacs daemon and try to connect to it. */ |
1447 | ||
1448 | void | |
1449 | start_daemon_and_retry_set_socket (void) | |
1450 | { | |
802bdb3c | 1451 | #ifndef WINDOWSNT |
636b507b DN |
1452 | pid_t dpid; |
1453 | int status; | |
636b507b DN |
1454 | |
1455 | dpid = fork (); | |
1456 | ||
1457 | if (dpid > 0) | |
1458 | { | |
fd95644b DN |
1459 | pid_t w; |
1460 | w = waitpid (dpid, &status, WUNTRACED | WCONTINUED); | |
636b507b | 1461 | |
361358ea | 1462 | if ((w == -1) || !WIFEXITED (status) || WEXITSTATUS (status)) |
fd95644b DN |
1463 | { |
1464 | message (TRUE, "Error: Could not start the Emacs daemon\n"); | |
1465 | exit (EXIT_FAILURE); | |
1466 | } | |
1467 | ||
1468 | /* Try connecting, the daemon should have started by now. */ | |
1469 | message (TRUE, "Emacs daemon should have started, trying to connect again\n"); | |
636b507b | 1470 | if ((emacs_socket = set_socket (1)) == INVALID_SOCKET) |
fd95644b DN |
1471 | { |
1472 | message (TRUE, "Error: Cannot connect even after starting the Emacs daemon\n"); | |
1473 | exit (EXIT_FAILURE); | |
1474 | } | |
636b507b DN |
1475 | } |
1476 | else if (dpid < 0) | |
1477 | { | |
fd95644b | 1478 | fprintf (stderr, "Error: Cannot fork!\n"); |
6ab88e02 | 1479 | exit (EXIT_FAILURE); |
636b507b DN |
1480 | } |
1481 | else | |
1482 | { | |
988e88ab J |
1483 | char emacs[] = "emacs"; |
1484 | char daemon[] = "--daemon"; | |
1485 | char *d_argv[] = {emacs, daemon, 0 }; | |
636b507b DN |
1486 | if (socket_name != NULL) |
1487 | { | |
1488 | /* Pass --daemon=socket_name as argument. */ | |
988e88ab | 1489 | const char *deq = "--daemon="; |
636b507b DN |
1490 | char *daemon_arg = alloca (strlen (deq) |
1491 | + strlen (socket_name) + 1); | |
1492 | strcpy (daemon_arg, deq); | |
1493 | strcat (daemon_arg, socket_name); | |
1494 | d_argv[1] = daemon_arg; | |
1495 | } | |
1496 | execvp ("emacs", d_argv); | |
1497 | message (TRUE, "%s: error starting emacs daemon\n", progname); | |
1498 | } | |
802bdb3c | 1499 | #endif /* WINDOWSNT */ |
636b507b DN |
1500 | } |
1501 | ||
aa0b6932 | 1502 | int |
873fbd0b | 1503 | main (int argc, char **argv) |
aa0b6932 | 1504 | { |
aa0b6932 | 1505 | int i, rl, needlf = 0; |
974b73e8 | 1506 | char *cwd, *str; |
aa0b6932 | 1507 | char string[BUFSIZ+1]; |
802bdb3c | 1508 | int null_socket_name, null_server_file, start_daemon_if_needed; |
aa0b6932 | 1509 | |
974b73e8 | 1510 | main_argv = argv; |
aa0b6932 JB |
1511 | progname = argv[0]; |
1512 | ||
ff90fbde JR |
1513 | #ifdef WINDOWSNT |
1514 | /* On Windows 7 and later, we need to explicitly associate emacsclient | |
1515 | with emacs so the UI behaves sensibly. */ | |
1516 | w32_set_user_model_id (); | |
1517 | #endif | |
1518 | ||
aa0b6932 JB |
1519 | /* Process options. */ |
1520 | decode_options (argc, argv); | |
1521 | ||
273b9028 | 1522 | if ((argc - optind < 1) && !eval && current_frame) |
23a7488d | 1523 | { |
974b73e8 KL |
1524 | message (TRUE, "%s: file name or argument required\n" |
1525 | "Try `%s --help' for more information\n", | |
1526 | progname, progname); | |
aa0b6932 | 1527 | exit (EXIT_FAILURE); |
23a7488d RS |
1528 | } |
1529 | ||
636b507b DN |
1530 | /* If alternate_editor is the empty string, start the emacs daemon |
1531 | in case of failure to connect. */ | |
1532 | start_daemon_if_needed = (alternate_editor | |
1533 | && (alternate_editor[0] == '\0')); | |
1534 | if (start_daemon_if_needed) | |
1535 | { | |
1536 | /* set_socket changes the values for socket_name and | |
1537 | server_file, we need to reset them, if they were NULL before | |
1538 | for the second call to set_socket. */ | |
1539 | null_socket_name = (socket_name == NULL); | |
1540 | null_server_file = (server_file == NULL); | |
1541 | } | |
aa0b6932 | 1542 | |
636b507b DN |
1543 | if ((emacs_socket = set_socket (alternate_editor |
1544 | || start_daemon_if_needed)) == INVALID_SOCKET) | |
1545 | if (start_daemon_if_needed) | |
1546 | { | |
1547 | /* Reset socket_name and server_file if they were NULL | |
1548 | before the set_socket call. */ | |
1549 | if (null_socket_name) | |
1550 | socket_name = NULL; | |
1551 | if (null_server_file) | |
1552 | server_file = NULL; | |
1553 | ||
1554 | start_daemon_and_retry_set_socket (); | |
1555 | } | |
1556 | else | |
1557 | fail (); | |
974b73e8 KL |
1558 | |
1559 | cwd = get_current_dir_name (); | |
46cec291 RS |
1560 | if (cwd == 0) |
1561 | { | |
1562 | /* getwd puts message in STRING if it fails. */ | |
974b73e8 KL |
1563 | message (TRUE, "%s: %s\n", progname, |
1564 | "Cannot get current working directory"); | |
819b8f00 | 1565 | fail (); |
46cec291 RS |
1566 | } |
1567 | ||
c66648e0 | 1568 | #ifdef WINDOWSNT |
0e0dced5 | 1569 | w32_give_focus (); |
c66648e0 JB |
1570 | #endif |
1571 | ||
273b9028 | 1572 | /* Send over our environment and current directory. */ |
59e085e0 KL |
1573 | if (!current_frame) |
1574 | { | |
1575 | extern char **environ; | |
1576 | int i; | |
1577 | for (i = 0; environ[i]; i++) | |
1578 | { | |
486ba65f JR |
1579 | send_to_emacs (emacs_socket, "-env "); |
1580 | quote_argument (emacs_socket, environ[i]); | |
1581 | send_to_emacs (emacs_socket, " "); | |
59e085e0 | 1582 | } |
2828d5f9 | 1583 | } |
ba528748 SM |
1584 | send_to_emacs (emacs_socket, "-dir "); |
1585 | quote_argument (emacs_socket, cwd); | |
1586 | send_to_emacs (emacs_socket, "/"); | |
1587 | send_to_emacs (emacs_socket, " "); | |
2828d5f9 | 1588 | |
6afdd335 | 1589 | retry: |
5212210c | 1590 | if (nowait) |
486ba65f | 1591 | send_to_emacs (emacs_socket, "-nowait "); |
292d74a3 | 1592 | |
92071250 | 1593 | if (current_frame) |
486ba65f | 1594 | send_to_emacs (emacs_socket, "-current-frame "); |
c0f342ab | 1595 | |
30be2360 | 1596 | if (display) |
87209357 | 1597 | { |
486ba65f JR |
1598 | send_to_emacs (emacs_socket, "-display "); |
1599 | quote_argument (emacs_socket, display); | |
1600 | send_to_emacs (emacs_socket, " "); | |
87209357 | 1601 | } |
30be2360 | 1602 | |
0191e222 CY |
1603 | if (parent_id) |
1604 | { | |
1605 | send_to_emacs (emacs_socket, "-parent-id "); | |
1606 | quote_argument (emacs_socket, parent_id); | |
1607 | send_to_emacs (emacs_socket, " "); | |
1608 | } | |
1609 | ||
8536c0f5 CY |
1610 | /* If using the current frame, send tty information to Emacs anyway. |
1611 | In daemon mode, Emacs may need to occupy this tty if no other | |
1612 | frame is available. */ | |
322ca650 | 1613 | if (tty || (current_frame && !eval)) |
9628b887 | 1614 | { |
273b9028 | 1615 | char *tty_type, *tty_name; |
0b0d3e0b | 1616 | |
273b9028 CY |
1617 | if (find_tty (&tty_type, &tty_name, !tty)) |
1618 | { | |
b2ff54a0 | 1619 | #if !defined (NO_SOCKETS_IN_FILE_SYSTEM) |
273b9028 | 1620 | init_signals (); |
b2ff54a0 | 1621 | #endif |
273b9028 CY |
1622 | send_to_emacs (emacs_socket, "-tty "); |
1623 | quote_argument (emacs_socket, tty_name); | |
1624 | send_to_emacs (emacs_socket, " "); | |
1625 | quote_argument (emacs_socket, tty_type); | |
1626 | send_to_emacs (emacs_socket, " "); | |
1627 | } | |
9628b887 | 1628 | } |
77134727 | 1629 | |
273b9028 | 1630 | if (!current_frame && !tty) |
486ba65f | 1631 | send_to_emacs (emacs_socket, "-window-system "); |
0b0d3e0b | 1632 | |
87209357 | 1633 | if ((argc - optind > 0)) |
5212210c | 1634 | { |
87209357 | 1635 | for (i = optind; i < argc; i++) |
46cec291 | 1636 | { |
0b0d3e0b | 1637 | |
87209357 | 1638 | if (eval) |
0b0d3e0b | 1639 | { |
974b73e8 | 1640 | /* Don't prepend cwd or anything like that. */ |
486ba65f JR |
1641 | send_to_emacs (emacs_socket, "-eval "); |
1642 | quote_argument (emacs_socket, argv[i]); | |
1643 | send_to_emacs (emacs_socket, " "); | |
0b0d3e0b KL |
1644 | continue; |
1645 | } | |
1646 | ||
1647 | if (*argv[i] == '+') | |
1648 | { | |
87209357 EZ |
1649 | char *p = argv[i] + 1; |
1650 | while (isdigit ((unsigned char) *p) || *p == ':') p++; | |
0b0d3e0b KL |
1651 | if (*p == 0) |
1652 | { | |
486ba65f JR |
1653 | send_to_emacs (emacs_socket, "-position "); |
1654 | quote_argument (emacs_socket, argv[i]); | |
1655 | send_to_emacs (emacs_socket, " "); | |
0b0d3e0b KL |
1656 | continue; |
1657 | } | |
0b0d3e0b | 1658 | } |
6cde1b21 JB |
1659 | #ifdef WINDOWSNT |
1660 | else if (! file_name_absolute_p (argv[i]) | |
1661 | && (isalpha (argv[i][0]) && argv[i][1] == ':')) | |
1662 | /* Windows can have a different default directory for each | |
1663 | drive, so the cwd passed via "-dir" is not sufficient | |
1664 | to account for that. | |
1665 | If the user uses <drive>:<relpath>, we hence need to be | |
1666 | careful to expand <relpath> with the default directory | |
1667 | corresponding to <drive>. */ | |
1668 | { | |
1669 | char *filename = (char *) xmalloc (MAX_PATH); | |
1670 | DWORD size; | |
1671 | ||
1672 | size = GetFullPathName (argv[i], MAX_PATH, filename, NULL); | |
1673 | if (size > 0 && size < MAX_PATH) | |
1674 | argv[i] = filename; | |
1675 | else | |
1676 | free (filename); | |
1677 | } | |
1678 | #endif | |
0b0d3e0b | 1679 | |
486ba65f | 1680 | send_to_emacs (emacs_socket, "-file "); |
486ba65f JR |
1681 | quote_argument (emacs_socket, argv[i]); |
1682 | send_to_emacs (emacs_socket, " "); | |
0b0d3e0b | 1683 | } |
46cec291 | 1684 | } |
273b9028 | 1685 | else if (eval) |
87209357 | 1686 | { |
273b9028 CY |
1687 | /* Read expressions interactively. */ |
1688 | while ((str = fgets (string, BUFSIZ, stdin))) | |
1689 | { | |
1690 | send_to_emacs (emacs_socket, "-eval "); | |
1691 | quote_argument (emacs_socket, str); | |
1692 | } | |
1693 | send_to_emacs (emacs_socket, " "); | |
87209357 | 1694 | } |
0b0d3e0b | 1695 | |
486ba65f | 1696 | send_to_emacs (emacs_socket, "\n"); |
46cec291 | 1697 | |
fc2040c0 KL |
1698 | /* Wait for an answer. */ |
1699 | if (!eval && !tty && !nowait) | |
30be2360 SM |
1700 | { |
1701 | printf ("Waiting for Emacs..."); | |
1702 | needlf = 2; | |
1703 | } | |
46cec291 | 1704 | fflush (stdout); |
0b0d3e0b | 1705 | fsync (1); |
46cec291 | 1706 | |
3cf8c6aa | 1707 | /* Now, wait for an answer and print any messages. */ |
4b7b77f6 | 1708 | while ((rl = recv (emacs_socket, string, BUFSIZ, 0)) > 0) |
3cf8c6aa | 1709 | { |
974b73e8 KL |
1710 | char *p; |
1711 | string[rl] = '\0'; | |
1712 | ||
1713 | p = string + strlen (string) - 1; | |
1714 | while (p > string && *p == '\n') | |
0b0d3e0b KL |
1715 | *p-- = 0; |
1716 | ||
31fa6595 | 1717 | if (strprefix ("-emacs-pid ", string)) |
4d553a13 | 1718 | { |
6afdd335 | 1719 | /* -emacs-pid PID: The process id of the Emacs process. */ |
77134727 KL |
1720 | emacs_pid = strtol (string + strlen ("-emacs-pid"), NULL, 10); |
1721 | } | |
974b73e8 | 1722 | else if (strprefix ("-window-system-unsupported ", string)) |
6afdd335 KL |
1723 | { |
1724 | /* -window-system-unsupported: Emacs was compiled without X | |
1725 | support. Try again on the terminal. */ | |
6afdd335 KL |
1726 | nowait = 0; |
1727 | tty = 1; | |
1728 | goto retry; | |
1729 | } | |
974b73e8 | 1730 | else if (strprefix ("-print ", string)) |
77134727 | 1731 | { |
6afdd335 | 1732 | /* -print STRING: Print STRING on the terminal. */ |
974b73e8 | 1733 | str = unquote_argument (string + strlen ("-print ")); |
0b0d3e0b | 1734 | if (needlf) |
77134727 | 1735 | printf ("\n"); |
0b0d3e0b KL |
1736 | printf ("%s", str); |
1737 | needlf = str[0] == '\0' ? needlf : str[strlen (str) - 1] != '\n'; | |
77134727 | 1738 | } |
974b73e8 | 1739 | else if (strprefix ("-error ", string)) |
77134727 | 1740 | { |
6afdd335 | 1741 | /* -error DESCRIPTION: Signal an error on the terminal. */ |
974b73e8 | 1742 | str = unquote_argument (string + strlen ("-error ")); |
0b0d3e0b KL |
1743 | if (needlf) |
1744 | printf ("\n"); | |
974b73e8 | 1745 | fprintf (stderr, "*ERROR*: %s", str); |
0b0d3e0b KL |
1746 | needlf = str[0] == '\0' ? needlf : str[strlen (str) - 1] != '\n'; |
1747 | } | |
c801ad51 | 1748 | #ifdef SIGSTOP |
382707ec | 1749 | else if (strprefix ("-suspend ", string)) |
0b0d3e0b | 1750 | { |
6afdd335 | 1751 | /* -suspend: Suspend this terminal, i.e., stop the process. */ |
0b0d3e0b | 1752 | if (needlf) |
77134727 | 1753 | printf ("\n"); |
0b0d3e0b KL |
1754 | needlf = 0; |
1755 | kill (0, SIGSTOP); | |
4d553a13 | 1756 | } |
b2ff54a0 | 1757 | #endif |
4d553a13 KL |
1758 | else |
1759 | { | |
6afdd335 | 1760 | /* Unknown command. */ |
0b0d3e0b | 1761 | if (needlf) |
4d553a13 | 1762 | printf ("\n"); |
974b73e8 KL |
1763 | printf ("*ERROR*: Unknown message: %s", string); |
1764 | needlf = string[0] == '\0' ? needlf : string[strlen (string) - 1] != '\n'; | |
4d553a13 | 1765 | } |
3cf8c6aa SM |
1766 | } |
1767 | ||
1768 | if (needlf) | |
1769 | printf ("\n"); | |
1770 | fflush (stdout); | |
0b0d3e0b | 1771 | fsync (1); |
23a7488d | 1772 | |
4b7b77f6 | 1773 | CLOSE_SOCKET (emacs_socket); |
65396510 | 1774 | return EXIT_SUCCESS; |
46cec291 RS |
1775 | } |
1776 | ||
1e7823d0 | 1777 | #endif /* HAVE_SOCKETS && HAVE_INET_SOCKETS */ |
aa0b6932 | 1778 | |
27711600 RM |
1779 | \f |
1780 | #ifndef HAVE_STRERROR | |
1781 | char * | |
1782 | strerror (errnum) | |
1783 | int errnum; | |
1784 | { | |
1785 | extern char *sys_errlist[]; | |
1786 | extern int sys_nerr; | |
1787 | ||
1788 | if (errnum >= 0 && errnum < sys_nerr) | |
1789 | return sys_errlist[errnum]; | |
1790 | return (char *) "Unknown error"; | |
1791 | } | |
1792 | ||
1793 | #endif /* ! HAVE_STRERROR */ | |
ab5796a9 MB |
1794 | |
1795 | /* arch-tag: f39bb9c4-73eb-477e-896d-50832e2ca9a7 | |
1796 | (do not change this comment) */ | |
65396510 TTN |
1797 | |
1798 | /* emacsclient.c ends here */ |