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 | ||
e69233c2 | 21 | #ifdef HAVE_CONFIG_H |
2f8fe2f4 | 22 | #include <config.h> |
e69233c2 PJ |
23 | #endif |
24 | ||
aa0b6932 | 25 | #ifdef WINDOWSNT |
aa0b6932 | 26 | |
bc28de71 JB |
27 | /* config.h defines these, which disables sockets altogether! */ |
28 | # undef _WINSOCKAPI_ | |
29 | # undef _WINSOCK_H | |
30 | ||
411b80a5 JB |
31 | # include <malloc.h> |
32 | # include <stdlib.h> | |
42073bfb | 33 | # include <windows.h> |
dbf60b07 | 34 | # include <commctrl.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> | |
48 | # endif | |
411b80a5 | 49 | |
18d2ad29 | 50 | # include <arpa/inet.h> |
448d4085 | 51 | |
e35fc962 | 52 | # define INVALID_SOCKET -1 |
aa0b6932 JB |
53 | # define HSOCKET int |
54 | # define CLOSE_SOCKET close | |
aa0b6932 | 55 | # define INITIALIZE() |
411b80a5 | 56 | |
5445ab06 DN |
57 | # ifndef WCONTINUED |
58 | # define WCONTINUED 8 | |
59 | # endif | |
60 | ||
411b80a5 | 61 | #endif /* !WINDOWSNT */ |
aa0b6932 | 62 | |
4e23f2ba | 63 | #undef signal |
46cec291 | 64 | |
42073bfb | 65 | #include <stdarg.h> |
e69233c2 | 66 | #include <ctype.h> |
8f9aaa0a | 67 | #include <stdio.h> |
aa0b6932 | 68 | #include "getopt.h" |
79f13bba DL |
69 | #ifdef HAVE_UNISTD_H |
70 | #include <unistd.h> | |
71 | #endif | |
8f9aaa0a | 72 | |
aa0b6932 JB |
73 | #ifdef WINDOWSNT |
74 | # include <io.h> | |
75 | #else /* not WINDOWSNT */ | |
9f637eea | 76 | # include <pwd.h> |
aa0b6932 | 77 | #endif /* not WINDOWSNT */ |
dc4a4a14 | 78 | #include <sys/stat.h> |
9f637eea | 79 | |
9628b887 | 80 | #include <signal.h> |
4d553a13 | 81 | #include <errno.h> |
9628b887 KL |
82 | |
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 | ||
117 | #ifndef NO_RETURN | |
118 | #define NO_RETURN | |
119 | #endif | |
bc558f3e JB |
120 | |
121 | /* Additional space when allocating buffers for filenames, etc. */ | |
122 | #define EXTRA_SPACE 100 | |
123 | ||
aa0b6932 | 124 | \f |
8f9aaa0a RS |
125 | /* Name used to invoke this program. */ |
126 | char *progname; | |
127 | ||
0a125897 KL |
128 | /* The second argument to main. */ |
129 | char **main_argv; | |
130 | ||
749ae770 | 131 | /* Nonzero means don't wait for a response from Emacs. --no-wait. */ |
8f9aaa0a RS |
132 | int nowait = 0; |
133 | ||
30be2360 SM |
134 | /* Nonzero means args are expressions to be evaluated. --eval. */ |
135 | int eval = 0; | |
136 | ||
31fa6595 SM |
137 | /* Nonzero means don't open a new frame. Inverse of --create-frame. */ |
138 | int current_frame = 1; | |
92071250 | 139 | |
30be2360 SM |
140 | /* The display on which Emacs should work. --display. */ |
141 | char *display = NULL; | |
142 | ||
0191e222 CY |
143 | /* The parent window ID, if we are opening a frame via XEmbed. */ |
144 | char *parent_id = NULL; | |
145 | ||
9628b887 | 146 | /* Nonzero means open a new Emacs frame on the current terminal. */ |
77134727 | 147 | int tty = 0; |
9628b887 | 148 | |
30be2360 SM |
149 | /* If non-NULL, the name of an editor to fallback to if the server |
150 | is not running. --alternate-editor. */ | |
b03d27bd | 151 | const char *alternate_editor = NULL; |
30be2360 | 152 | |
3db926be | 153 | /* If non-NULL, the filename of the UNIX socket. */ |
254107e4 RS |
154 | char *socket_name = NULL; |
155 | ||
aa0b6932 JB |
156 | /* If non-NULL, the filename of the authentication file. */ |
157 | char *server_file = NULL; | |
158 | ||
c66648e0 JB |
159 | /* PID of the Emacs server process. */ |
160 | int emacs_pid = 0; | |
161 | ||
873fbd0b | 162 | void print_help_and_exit (void) NO_RETURN; |
68441b90 DN |
163 | void fail (void) NO_RETURN; |
164 | ||
7f3bff3e | 165 | |
8f9aaa0a RS |
166 | struct option longopts[] = |
167 | { | |
749ae770 | 168 | { "no-wait", no_argument, NULL, 'n' }, |
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' }, |
b03d27bd | 176 | #ifndef NO_SOCKETS_IN_FILE_SYSTEM |
254107e4 | 177 | { "socket-name", required_argument, NULL, 's' }, |
b03d27bd | 178 | #endif |
aa0b6932 | 179 | { "server-file", required_argument, NULL, 'f' }, |
0ebec7d3 | 180 | #ifndef WINDOWSNT |
30be2360 | 181 | { "display", required_argument, NULL, 'd' }, |
0ebec7d3 | 182 | #endif |
0191e222 | 183 | { "parent-id", required_argument, NULL, 'p' }, |
30be2360 | 184 | { 0, 0, 0, 0 } |
8f9aaa0a RS |
185 | }; |
186 | ||
974b73e8 KL |
187 | \f |
188 | /* Like malloc but get fatal error if memory is exhausted. */ | |
189 | ||
190 | long * | |
873fbd0b | 191 | xmalloc (unsigned int size) |
974b73e8 KL |
192 | { |
193 | long *result = (long *) malloc (size); | |
194 | if (result == NULL) | |
195 | { | |
196 | perror ("malloc"); | |
197 | exit (EXIT_FAILURE); | |
198 | } | |
199 | return result; | |
200 | } | |
201 | ||
202 | /* Like strdup but get a fatal error if memory is exhausted. */ | |
203 | ||
204 | char * | |
205 | xstrdup (const char *s) | |
206 | { | |
207 | char *result = strdup (s); | |
208 | if (result == NULL) | |
209 | { | |
210 | perror ("strdup"); | |
211 | exit (EXIT_FAILURE); | |
212 | } | |
213 | return result; | |
214 | } | |
215 | ||
216 | /* From sysdep.c */ | |
217 | #if !defined (HAVE_GET_CURRENT_DIR_NAME) || defined (BROKEN_GET_CURRENT_DIR_NAME) | |
218 | ||
cb06b8dc SM |
219 | /* From lisp.h */ |
220 | #ifndef DIRECTORY_SEP | |
221 | #define DIRECTORY_SEP '/' | |
222 | #endif | |
223 | #ifndef IS_DIRECTORY_SEP | |
224 | #define IS_DIRECTORY_SEP(_c_) ((_c_) == DIRECTORY_SEP) | |
225 | #endif | |
226 | #ifndef IS_DEVICE_SEP | |
227 | #ifndef DEVICE_SEP | |
228 | #define IS_DEVICE_SEP(_c_) 0 | |
229 | #else | |
230 | #define IS_DEVICE_SEP(_c_) ((_c_) == DEVICE_SEP) | |
231 | #endif | |
232 | #endif | |
233 | #ifndef IS_ANY_SEP | |
234 | #define IS_ANY_SEP(_c_) (IS_DIRECTORY_SEP (_c_)) | |
235 | #endif | |
236 | ||
237 | ||
974b73e8 | 238 | /* Return the current working directory. Returns NULL on errors. |
5ab73228 | 239 | Any other returned value must be freed with free. This is used |
974b73e8 KL |
240 | only when get_current_dir_name is not defined on the system. */ |
241 | char* | |
7c3320d8 | 242 | get_current_dir_name (void) |
974b73e8 KL |
243 | { |
244 | char *buf; | |
245 | char *pwd; | |
246 | struct stat dotstat, pwdstat; | |
247 | /* If PWD is accurate, use it instead of calling getwd. PWD is | |
248 | sometimes a nicer name, and using it may avoid a fatal error if a | |
249 | parent directory is searchable but not readable. */ | |
7ce8671d | 250 | if ((pwd = egetenv ("PWD")) != 0 |
974b73e8 KL |
251 | && (IS_DIRECTORY_SEP (*pwd) || (*pwd && IS_DEVICE_SEP (pwd[1]))) |
252 | && stat (pwd, &pwdstat) == 0 | |
253 | && stat (".", &dotstat) == 0 | |
254 | && dotstat.st_ino == pwdstat.st_ino | |
255 | && dotstat.st_dev == pwdstat.st_dev | |
256 | #ifdef MAXPATHLEN | |
257 | && strlen (pwd) < MAXPATHLEN | |
258 | #endif | |
259 | ) | |
260 | { | |
261 | buf = (char *) xmalloc (strlen (pwd) + 1); | |
262 | if (!buf) | |
263 | return NULL; | |
264 | strcpy (buf, pwd); | |
265 | } | |
266 | #ifdef HAVE_GETCWD | |
267 | else | |
268 | { | |
269 | size_t buf_size = 1024; | |
270 | buf = (char *) xmalloc (buf_size); | |
271 | if (!buf) | |
272 | return NULL; | |
273 | for (;;) | |
274 | { | |
275 | if (getcwd (buf, buf_size) == buf) | |
276 | break; | |
277 | if (errno != ERANGE) | |
278 | { | |
279 | int tmp_errno = errno; | |
280 | free (buf); | |
281 | errno = tmp_errno; | |
282 | return NULL; | |
283 | } | |
284 | buf_size *= 2; | |
285 | buf = (char *) realloc (buf, buf_size); | |
286 | if (!buf) | |
287 | return NULL; | |
288 | } | |
289 | } | |
290 | #else | |
291 | else | |
292 | { | |
293 | /* We need MAXPATHLEN here. */ | |
294 | buf = (char *) xmalloc (MAXPATHLEN + 1); | |
295 | if (!buf) | |
296 | return NULL; | |
297 | if (getwd (buf) == NULL) | |
298 | { | |
299 | int tmp_errno = errno; | |
300 | free (buf); | |
301 | errno = tmp_errno; | |
302 | return NULL; | |
303 | } | |
304 | } | |
305 | #endif | |
306 | return buf; | |
307 | } | |
308 | #endif | |
309 | ||
42073bfb | 310 | #ifdef WINDOWSNT |
7ce8671d JB |
311 | |
312 | #define REG_ROOT "SOFTWARE\\GNU\\Emacs" | |
313 | ||
314 | /* Retrieve an environment variable from the Emacs subkeys of the registry. | |
315 | Return NULL if the variable was not found, or it was empty. | |
316 | This code is based on w32_get_resource (w32.c). */ | |
317 | char * | |
7c3320d8 | 318 | w32_get_resource (HKEY predefined, char *key, LPDWORD type) |
7ce8671d JB |
319 | { |
320 | HKEY hrootkey = NULL; | |
321 | char *result = NULL; | |
322 | DWORD cbData; | |
323 | ||
324 | if (RegOpenKeyEx (predefined, REG_ROOT, 0, KEY_READ, &hrootkey) == ERROR_SUCCESS) | |
325 | { | |
326 | if (RegQueryValueEx (hrootkey, key, NULL, NULL, NULL, &cbData) == ERROR_SUCCESS) | |
327 | { | |
328 | result = (char *) xmalloc (cbData); | |
329 | ||
bc558f3e JB |
330 | if ((RegQueryValueEx (hrootkey, key, NULL, type, result, &cbData) != ERROR_SUCCESS) |
331 | || (*result == 0)) | |
7ce8671d JB |
332 | { |
333 | free (result); | |
334 | result = NULL; | |
335 | } | |
336 | } | |
337 | ||
338 | RegCloseKey (hrootkey); | |
339 | } | |
340 | ||
341 | return result; | |
342 | } | |
343 | ||
344 | /* | |
345 | getenv wrapper for Windows | |
346 | ||
768c0c0f | 347 | This is needed to duplicate Emacs's behavior, which is to look for environment |
7ce8671d JB |
348 | variables in the registry if they don't appear in the environment. |
349 | */ | |
350 | char * | |
7c3320d8 | 351 | w32_getenv (char *envvar) |
7ce8671d JB |
352 | { |
353 | char *value; | |
354 | DWORD dwType; | |
355 | ||
356 | if (value = getenv (envvar)) | |
357 | /* Found in the environment. */ | |
358 | return value; | |
359 | ||
360 | if (! (value = w32_get_resource (HKEY_CURRENT_USER, envvar, &dwType)) && | |
361 | ! (value = w32_get_resource (HKEY_LOCAL_MACHINE, envvar, &dwType))) | |
d41784ee EZ |
362 | { |
363 | /* "w32console" is what Emacs on Windows uses for tty-type under -nw. */ | |
364 | if (strcmp (envvar, "TERM") == 0) | |
365 | return xstrdup ("w32console"); | |
366 | /* Found neither in the environment nor in the registry. */ | |
367 | return NULL; | |
368 | } | |
7ce8671d JB |
369 | |
370 | if (dwType == REG_SZ) | |
371 | /* Registry; no need to expand. */ | |
372 | return value; | |
373 | ||
374 | if (dwType == REG_EXPAND_SZ) | |
375 | { | |
376 | DWORD size; | |
377 | ||
378 | if (size = ExpandEnvironmentStrings (value, NULL, 0)) | |
379 | { | |
380 | char *buffer = (char *) xmalloc (size); | |
381 | if (ExpandEnvironmentStrings (value, buffer, size)) | |
382 | { | |
383 | /* Found and expanded. */ | |
384 | free (value); | |
385 | return buffer; | |
386 | } | |
387 | ||
388 | /* Error expanding. */ | |
389 | free (buffer); | |
390 | } | |
391 | } | |
392 | ||
393 | /* Not the right type, or not correctly expanded. */ | |
394 | free (value); | |
395 | return NULL; | |
396 | } | |
397 | ||
ff90fbde | 398 | void |
7c3320d8 | 399 | w32_set_user_model_id (void) |
ff90fbde JR |
400 | { |
401 | HMODULE shell; | |
0a3472c7 | 402 | HRESULT (WINAPI * set_user_model) (wchar_t * id); |
ff90fbde JR |
403 | |
404 | /* On Windows 7 and later, we need to set the user model ID | |
405 | to associate emacsclient launched files with Emacs frames | |
406 | in the UI. */ | |
361358ea | 407 | shell = LoadLibrary ("shell32.dll"); |
ff90fbde JR |
408 | if (shell) |
409 | { | |
410 | set_user_model | |
411 | = (void *) GetProcAddress (shell, | |
412 | "SetCurrentProcessExplicitAppUserModelID"); | |
413 | /* If the function is defined, then we are running on Windows 7 | |
414 | or newer, and the UI uses this to group related windows | |
415 | together. Since emacs, runemacs, emacsclient are related, we | |
416 | want them grouped even though the executables are different, | |
417 | so we need to set a consistent ID between them. */ | |
418 | if (set_user_model) | |
419 | set_user_model (L"GNU.Emacs"); | |
420 | ||
421 | FreeLibrary (shell); | |
422 | } | |
423 | } | |
424 | ||
42073bfb | 425 | int |
7c3320d8 | 426 | w32_window_app (void) |
42073bfb JB |
427 | { |
428 | static int window_app = -1; | |
429 | char szTitle[MAX_PATH]; | |
430 | ||
431 | if (window_app < 0) | |
dbf60b07 JR |
432 | { |
433 | /* Checking for STDOUT does not work; it's a valid handle also in | |
434 | nonconsole apps. Testing for the console title seems to work. */ | |
435 | window_app = (GetConsoleTitleA (szTitle, MAX_PATH) == 0); | |
436 | if (window_app) | |
361358ea | 437 | InitCommonControls (); |
dbf60b07 | 438 | } |
42073bfb JB |
439 | |
440 | return window_app; | |
441 | } | |
105faa84 DN |
442 | |
443 | /* | |
cb06b8dc | 444 | execvp wrapper for Windows. Quotes arguments with embedded spaces. |
105faa84 DN |
445 | |
446 | This is necessary due to the broken implementation of exec* routines in | |
447 | the Microsoft libraries: they concatenate the arguments together without | |
448 | quoting special characters, and pass the result to CreateProcess, with | |
7c3320d8 | 449 | predictably bad results. By contrast, POSIX execvp passes the arguments |
105faa84 DN |
450 | directly into the argv array of the child process. |
451 | */ | |
452 | int | |
7c3320d8 | 453 | w32_execvp (const char *path, char **argv) |
105faa84 DN |
454 | { |
455 | int i; | |
456 | ||
457 | /* Required to allow a .BAT script as alternate editor. */ | |
458 | argv[0] = (char *) alternate_editor; | |
459 | ||
460 | for (i = 0; argv[i]; i++) | |
461 | if (strchr (argv[i], ' ')) | |
462 | { | |
463 | char *quoted = alloca (strlen (argv[i]) + 3); | |
464 | sprintf (quoted, "\"%s\"", argv[i]); | |
465 | argv[i] = quoted; | |
466 | } | |
467 | ||
468 | return execvp (path, argv); | |
469 | } | |
470 | ||
471 | #undef execvp | |
472 | #define execvp w32_execvp | |
473 | ||
d41784ee EZ |
474 | /* Emulation of ttyname for Windows. */ |
475 | char * | |
476 | ttyname (int fd) | |
477 | { | |
478 | return "CONOUT$"; | |
479 | } | |
480 | ||
105faa84 | 481 | #endif /* WINDOWSNT */ |
42073bfb | 482 | |
f387c1ee JB |
483 | /* Display a normal or error message. |
484 | On Windows, use a message box if compiled as a Windows app. */ | |
42073bfb JB |
485 | void |
486 | message (int is_error, char *message, ...) | |
487 | { | |
361358ea | 488 | char msg[2048]; |
42073bfb JB |
489 | va_list args; |
490 | ||
491 | va_start (args, message); | |
42073bfb JB |
492 | vsprintf (msg, message, args); |
493 | va_end (args); | |
494 | ||
495 | #ifdef WINDOWSNT | |
496 | if (w32_window_app ()) | |
497 | { | |
498 | if (is_error) | |
499 | MessageBox (NULL, msg, "Emacsclient ERROR", MB_ICONERROR); | |
500 | else | |
501 | MessageBox (NULL, msg, "Emacsclient", MB_ICONINFORMATION); | |
502 | } | |
503 | else | |
504 | #endif | |
9219db75 JB |
505 | { |
506 | FILE *f = is_error ? stderr : stdout; | |
507 | ||
508 | fputs (msg, f); | |
509 | fflush (f); | |
510 | } | |
42073bfb JB |
511 | } |
512 | ||
8f9aaa0a | 513 | /* Decode the options from argv and argc. |
5212210c | 514 | The global variable `optind' will say how many arguments we used up. */ |
8f9aaa0a | 515 | |
5212210c | 516 | void |
873fbd0b | 517 | decode_options (int argc, char **argv) |
8f9aaa0a | 518 | { |
7ce8671d | 519 | alternate_editor = egetenv ("ALTERNATE_EDITOR"); |
0ea5797a | 520 | |
8f9aaa0a RS |
521 | while (1) |
522 | { | |
dc1cd5f7 | 523 | int opt = getopt_long_only (argc, argv, |
b03d27bd | 524 | #ifndef NO_SOCKETS_IN_FILE_SYSTEM |
974b73e8 | 525 | "VHnea:s:f:d:tc", |
b03d27bd | 526 | #else |
974b73e8 | 527 | "VHnea:f:d:tc", |
b03d27bd | 528 | #endif |
974b73e8 | 529 | longopts, 0); |
8f9aaa0a RS |
530 | |
531 | if (opt == EOF) | |
532 | break; | |
533 | ||
534 | switch (opt) | |
535 | { | |
536 | case 0: | |
537 | /* If getopt returns 0, then it has already processed a | |
538 | long-named option. We should do nothing. */ | |
539 | break; | |
e69233c2 | 540 | |
97e3214d GM |
541 | case 'a': |
542 | alternate_editor = optarg; | |
543 | break; | |
e69233c2 | 544 | |
b03d27bd | 545 | #ifndef NO_SOCKETS_IN_FILE_SYSTEM |
254107e4 RS |
546 | case 's': |
547 | socket_name = optarg; | |
548 | break; | |
b03d27bd | 549 | #endif |
254107e4 | 550 | |
aa0b6932 JB |
551 | case 'f': |
552 | server_file = optarg; | |
553 | break; | |
254107e4 | 554 | |
0ea5797a SM |
555 | /* We used to disallow this argument in w32, but it seems better |
556 | to allow it, for the occasional case where the user is | |
557 | connecting with a w32 client to a server compiled with X11 | |
558 | support. */ | |
30be2360 SM |
559 | case 'd': |
560 | display = optarg; | |
561 | break; | |
562 | ||
8f9aaa0a RS |
563 | case 'n': |
564 | nowait = 1; | |
565 | break; | |
566 | ||
30be2360 SM |
567 | case 'e': |
568 | eval = 1; | |
569 | break; | |
570 | ||
8f9aaa0a | 571 | case 'V': |
42073bfb | 572 | message (FALSE, "emacsclient %s\n", VERSION); |
65396510 | 573 | exit (EXIT_SUCCESS); |
8f9aaa0a | 574 | break; |
46cec291 | 575 | |
819b8f00 | 576 | case 't': |
77134727 | 577 | tty = 1; |
c1b8e896 | 578 | current_frame = 0; |
77134727 KL |
579 | break; |
580 | ||
e5299d8d | 581 | case 'c': |
31fa6595 | 582 | current_frame = 0; |
9628b887 | 583 | break; |
0b0d3e0b | 584 | |
0191e222 CY |
585 | case 'p': |
586 | parent_id = optarg; | |
587 | current_frame = 0; | |
588 | break; | |
589 | ||
8f9aaa0a | 590 | case 'H': |
8f9aaa0a | 591 | print_help_and_exit (); |
20c396e8 JB |
592 | break; |
593 | ||
594 | default: | |
42073bfb | 595 | message (TRUE, "Try `%s --help' for more information\n", progname); |
65396510 | 596 | exit (EXIT_FAILURE); |
20c396e8 | 597 | break; |
8f9aaa0a RS |
598 | } |
599 | } | |
9628b887 | 600 | |
273b9028 CY |
601 | /* If the -c option is used (without -t) and no --display argument |
602 | is provided, try $DISPLAY. | |
603 | Without the -c option, we used to set `display' to $DISPLAY by | |
604 | default, but this changed the default behavior and is sometimes | |
605 | inconvenient. So we force users to use "--display $DISPLAY" if | |
606 | they want Emacs to connect to their current display. */ | |
09317bf4 | 607 | if (!current_frame && !tty && !display) |
e7534fc4 AR |
608 | { |
609 | display = egetenv ("DISPLAY"); | |
610 | #ifdef NS_IMPL_COCOA | |
611 | /* Under Cocoa, we don't really use displays the same way as in X, | |
612 | so provide a dummy. */ | |
613 | if (!display || strlen (display) == 0) | |
614 | display = "ns"; | |
615 | #endif | |
616 | } | |
9997dc15 | 617 | |
273b9028 | 618 | /* A null-string display is invalid. */ |
0ea5797a SM |
619 | if (display && strlen (display) == 0) |
620 | display = NULL; | |
621 | ||
273b9028 CY |
622 | /* If no display is available, new frames are tty frames. */ |
623 | if (!current_frame && !display) | |
92071250 | 624 | tty = 1; |
c0f342ab | 625 | |
b8ccaf6f | 626 | /* --no-wait implies --current-frame on ttys when there are file |
273b9028 | 627 | arguments or expressions given. */ |
b8ccaf6f | 628 | if (nowait && tty && argc - optind > 0) |
92071250 | 629 | current_frame = 1; |
802bdb3c DN |
630 | |
631 | #ifdef WINDOWSNT | |
69157c99 | 632 | if (alternate_editor && alternate_editor[0] == '\0') |
802bdb3c DN |
633 | { |
634 | message (TRUE, "--alternate-editor argument or ALTERNATE_EDITOR variable cannot be\n\ | |
635 | an empty string"); | |
636 | exit (EXIT_FAILURE); | |
637 | } | |
638 | #endif /* WINDOWSNT */ | |
8f9aaa0a RS |
639 | } |
640 | ||
974b73e8 | 641 | \f |
7f3bff3e | 642 | void |
873fbd0b | 643 | print_help_and_exit (void) |
8f9aaa0a | 644 | { |
c0f342ab JB |
645 | /* Spaces and tabs are significant in this message; they're chosen so the |
646 | message aligns properly both in a tty and in a Windows message box. | |
647 | Please try to preserve them; otherwise the output is very hard to read | |
648 | when using emacsclientw. */ | |
42073bfb | 649 | message (FALSE, |
974b73e8 | 650 | "Usage: %s [OPTIONS] FILE...\n\ |
30be2360 SM |
651 | Tell the Emacs server to visit the specified files.\n\ |
652 | Every FILE can be either just a FILENAME or [+LINE[:COLUMN]] FILENAME.\n\ | |
20c396e8 | 653 | \n\ |
30be2360 | 654 | The following OPTIONS are accepted:\n\ |
c0f342ab JB |
655 | -V, --version Just print version info and return\n\ |
656 | -H, --help Print this usage information message\n\ | |
dc1cd5f7 | 657 | -nw, -t, --tty Open a new Emacs frame on the current terminal\n\ |
c4b858e3 | 658 | -c, --create-frame Create a new frame instead of trying to\n\ |
9dfda22f | 659 | use the current Emacs frame\n\ |
c0f342ab | 660 | -e, --eval Evaluate the FILE arguments as ELisp expressions\n\ |
d07529f3 | 661 | -n, --no-wait Don't wait for the server to return\n\ |
24d5010d | 662 | -d DISPLAY, --display=DISPLAY\n\ |
0191e222 CY |
663 | Visit the file in the given display\n\ |
664 | --parent-id=ID Open in parent window ID, via XEmbed\n" | |
aa0b6932 | 665 | #ifndef NO_SOCKETS_IN_FILE_SYSTEM |
24d5010d | 666 | "-s SOCKET, --socket-name=SOCKET\n\ |
9dfda22f | 667 | Set filename of the UNIX socket for communication\n" |
aa0b6932 | 668 | #endif |
24d5010d | 669 | "-f SERVER, --server-file=SERVER\n\ |
9dfda22f | 670 | Set filename of the TCP authentication file\n\ |
24d5010d | 671 | -a EDITOR, --alternate-editor=EDITOR\n\ |
9dfda22f | 672 | Editor to fallback to if the server is not running\n" |
6133a1a9 | 673 | #ifndef WINDOWSNT |
c3f995a2 JB |
674 | " If EDITOR is the empty string, start Emacs in daemon\n\ |
675 | mode and try connecting again\n" | |
6133a1a9 | 676 | #endif /* not WINDOWSNT */ |
c3f995a2 | 677 | "\n\ |
5f54cae6 | 678 | Report bugs with M-x report-emacs-bug.\n", progname); |
65396510 | 679 | exit (EXIT_SUCCESS); |
8f9aaa0a | 680 | } |
5212210c | 681 | |
aa0b6932 JB |
682 | /* |
683 | Try to run a different command, or --if no alternate editor is | |
684 | defined-- exit with an errorcode. | |
cb06b8dc | 685 | Uses argv, but gets it from the global variable main_argv. |
aa0b6932 JB |
686 | */ |
687 | void | |
974b73e8 | 688 | fail (void) |
9002956f | 689 | { |
aa0b6932 | 690 | if (alternate_editor) |
9002956f | 691 | { |
aa0b6932 | 692 | int i = optind - 1; |
4472aef4 | 693 | |
974b73e8 | 694 | execvp (alternate_editor, main_argv + i); |
42073bfb | 695 | message (TRUE, "%s: error executing alternate editor \"%s\"\n", |
974b73e8 | 696 | progname, alternate_editor); |
9002956f | 697 | } |
aa0b6932 | 698 | exit (EXIT_FAILURE); |
9002956f KL |
699 | } |
700 | ||
aa0b6932 | 701 | \f |
1e7823d0 | 702 | #if !defined (HAVE_SOCKETS) || !defined (HAVE_INET_SOCKETS) |
9002956f | 703 | |
aa0b6932 JB |
704 | int |
705 | main (argc, argv) | |
706 | int argc; | |
707 | char **argv; | |
9002956f | 708 | { |
974b73e8 KL |
709 | main_argv = argv; |
710 | progname = argv[0]; | |
711 | message (TRUE, "%s: Sorry, the Emacs server is supported only\n" | |
c0f342ab | 712 | "on systems with Berkeley sockets.\n", |
aa0b6932 | 713 | argv[0]); |
974b73e8 | 714 | fail (); |
9002956f KL |
715 | } |
716 | ||
1e7823d0 | 717 | #else /* HAVE_SOCKETS && HAVE_INET_SOCKETS */ |
2828d5f9 | 718 | |
aa0b6932 JB |
719 | #ifdef WINDOWSNT |
720 | # include <winsock2.h> | |
2828d5f9 | 721 | #else |
aa0b6932 JB |
722 | # include <sys/types.h> |
723 | # include <sys/socket.h> | |
724 | # include <sys/un.h> | |
aa0b6932 JB |
725 | #endif |
726 | ||
727 | #define AUTH_KEY_LENGTH 64 | |
728 | #define SEND_BUFFER_SIZE 4096 | |
729 | ||
873fbd0b | 730 | extern char *strerror (int); |
aa0b6932 JB |
731 | |
732 | /* Buffer to accumulate data to send in TCP connections. */ | |
733 | char send_buffer[SEND_BUFFER_SIZE + 1]; | |
734 | int sblen = 0; /* Fill pointer for the send buffer. */ | |
4b7b77f6 JR |
735 | /* Socket used to communicate with the Emacs server process. */ |
736 | HSOCKET emacs_socket = 0; | |
aa0b6932 | 737 | |
d22b00e5 JR |
738 | /* On Windows, the socket library was historically separate from the standard |
739 | C library, so errors are handled differently. */ | |
740 | void | |
873fbd0b | 741 | sock_err_message (char *function_name) |
d22b00e5 JR |
742 | { |
743 | #ifdef WINDOWSNT | |
744 | char* msg = NULL; | |
745 | ||
746 | FormatMessage (FORMAT_MESSAGE_FROM_SYSTEM | |
747 | | FORMAT_MESSAGE_ALLOCATE_BUFFER | |
748 | | FORMAT_MESSAGE_ARGUMENT_ARRAY, | |
749 | NULL, WSAGetLastError (), 0, (LPTSTR)&msg, 0, NULL); | |
750 | ||
751 | message (TRUE, "%s: %s: %s\n", progname, function_name, msg); | |
752 | ||
753 | LocalFree (msg); | |
754 | #else | |
755 | message (TRUE, "%s: %s: %s\n", progname, function_name, strerror (errno)); | |
756 | #endif | |
757 | } | |
758 | ||
759 | ||
aa0b6932 JB |
760 | /* Let's send the data to Emacs when either |
761 | - the data ends in "\n", or | |
762 | - the buffer is full (but this shouldn't happen) | |
763 | Otherwise, we just accumulate it. */ | |
b03d27bd | 764 | void |
3a35a84c | 765 | send_to_emacs (HSOCKET s, char *data) |
aa0b6932 JB |
766 | { |
767 | while (data) | |
2828d5f9 | 768 | { |
aa0b6932 JB |
769 | int dlen = strlen (data); |
770 | if (dlen + sblen >= SEND_BUFFER_SIZE) | |
771 | { | |
772 | int part = SEND_BUFFER_SIZE - sblen; | |
773 | strncpy (&send_buffer[sblen], data, part); | |
774 | data += part; | |
775 | sblen = SEND_BUFFER_SIZE; | |
776 | } | |
777 | else if (dlen) | |
778 | { | |
779 | strcpy (&send_buffer[sblen], data); | |
780 | data = NULL; | |
781 | sblen += dlen; | |
782 | } | |
783 | else | |
784 | break; | |
785 | ||
786 | if (sblen == SEND_BUFFER_SIZE | |
787 | || (sblen > 0 && send_buffer[sblen-1] == '\n')) | |
788 | { | |
789 | int sent = send (s, send_buffer, sblen, 0); | |
790 | if (sent != sblen) | |
791 | strcpy (send_buffer, &send_buffer[sent]); | |
792 | sblen -= sent; | |
793 | } | |
2828d5f9 | 794 | } |
2828d5f9 | 795 | } |
2828d5f9 KL |
796 | |
797 | \f | |
0b0d3e0b | 798 | /* In STR, insert a & before each &, each space, each newline, and |
a4cf2096 | 799 | any initial -. Change spaces to underscores, too, so that the |
0b0d3e0b KL |
800 | return value never contains a space. |
801 | ||
3a35a84c | 802 | Does not change the string. Outputs the result to S. */ |
87209357 | 803 | void |
3a35a84c | 804 | quote_argument (HSOCKET s, char *str) |
5212210c | 805 | { |
9002956f | 806 | char *copy = (char *) xmalloc (strlen (str) * 2 + 1); |
5212210c RS |
807 | char *p, *q; |
808 | ||
0b0d3e0b | 809 | p = str; |
5212210c RS |
810 | q = copy; |
811 | while (*p) | |
812 | { | |
813 | if (*p == ' ') | |
814 | { | |
f1db6a73 | 815 | *q++ = '&'; |
5212210c RS |
816 | *q++ = '_'; |
817 | p++; | |
818 | } | |
3cf8c6aa SM |
819 | else if (*p == '\n') |
820 | { | |
821 | *q++ = '&'; | |
822 | *q++ = 'n'; | |
823 | p++; | |
824 | } | |
5212210c RS |
825 | else |
826 | { | |
0b0d3e0b | 827 | if (*p == '&' || (*p == '-' && p == str)) |
f1db6a73 | 828 | *q++ = '&'; |
5212210c RS |
829 | *q++ = *p++; |
830 | } | |
831 | } | |
f1db6a73 | 832 | *q++ = 0; |
5212210c | 833 | |
486ba65f | 834 | send_to_emacs (s, copy); |
87209357 EZ |
835 | |
836 | free (copy); | |
5212210c | 837 | } |
0c76956f | 838 | |
0b0d3e0b KL |
839 | |
840 | /* The inverse of quote_argument. Removes quoting in string STR by | |
841 | modifying the string in place. Returns STR. */ | |
842 | ||
843 | char * | |
873fbd0b | 844 | unquote_argument (char *str) |
0b0d3e0b KL |
845 | { |
846 | char *p, *q; | |
847 | ||
848 | if (! str) | |
849 | return str; | |
850 | ||
851 | p = str; | |
852 | q = str; | |
853 | while (*p) | |
854 | { | |
855 | if (*p == '&') | |
856 | { | |
857 | p++; | |
858 | if (*p == '&') | |
859 | *p = '&'; | |
860 | else if (*p == '_') | |
861 | *p = ' '; | |
862 | else if (*p == 'n') | |
863 | *p = '\n'; | |
864 | else if (*p == '-') | |
865 | *p = '-'; | |
866 | } | |
867 | *q++ = *p++; | |
868 | } | |
869 | *q = 0; | |
870 | return str; | |
871 | } | |
872 | ||
8f9aaa0a | 873 | \f |
b03d27bd | 874 | int |
873fbd0b | 875 | file_name_absolute_p (const unsigned char *filename) |
b03d27bd JB |
876 | { |
877 | /* Sanity check, it shouldn't happen. */ | |
878 | if (! filename) return FALSE; | |
879 | ||
880 | /* /xxx is always an absolute path. */ | |
881 | if (filename[0] == '/') return TRUE; | |
882 | ||
883 | /* Empty filenames (which shouldn't happen) are relative. */ | |
884 | if (filename[0] == '\0') return FALSE; | |
885 | ||
886 | #ifdef WINDOWSNT | |
71b8f735 | 887 | /* X:\xxx is always absolute. */ |
5f7a4874 | 888 | if (isalpha (filename[0]) |
cb0297bb | 889 | && filename[1] == ':' && (filename[2] == '\\' || filename[2] == '/')) |
b03d27bd JB |
890 | return TRUE; |
891 | ||
892 | /* Both \xxx and \\xxx\yyy are absolute. */ | |
893 | if (filename[0] == '\\') return TRUE; | |
894 | #endif | |
895 | ||
896 | return FALSE; | |
897 | } | |
898 | ||
aa0b6932 | 899 | #ifdef WINDOWSNT |
f0384499 | 900 | /* Wrapper to make WSACleanup a cdecl, as required by atexit. */ |
7c3320d8 JB |
901 | void __cdecl |
902 | close_winsock (void) | |
aa0b6932 JB |
903 | { |
904 | WSACleanup (); | |
905 | } | |
0c76956f | 906 | |
b03d27bd JB |
907 | /* Initialize the WinSock2 library. */ |
908 | void | |
7c3320d8 | 909 | initialize_sockets (void) |
0c76956f | 910 | { |
aa0b6932 JB |
911 | WSADATA wsaData; |
912 | ||
aa0b6932 JB |
913 | if (WSAStartup (MAKEWORD (2, 0), &wsaData)) |
914 | { | |
78da39c6 | 915 | message (TRUE, "%s: error initializing WinSock2\n", progname); |
aa0b6932 JB |
916 | exit (EXIT_FAILURE); |
917 | } | |
918 | ||
919 | atexit (close_winsock); | |
0c76956f | 920 | } |
e35fc962 | 921 | #endif /* WINDOWSNT */ |
974b73e8 | 922 | |
8f9aaa0a | 923 | \f |
97e3214d | 924 | /* |
aa0b6932 | 925 | * Read the information needed to set up a TCP comm channel with |
434a6c5d | 926 | * the Emacs server: host, port, pid and authentication string. |
0e0dced5 | 927 | */ |
b03d27bd | 928 | int |
873fbd0b | 929 | get_server_config (struct sockaddr_in *server, char *authentication) |
97e3214d | 930 | { |
aa0b6932 JB |
931 | char dotted[32]; |
932 | char *port; | |
434a6c5d | 933 | char *pid; |
b03d27bd | 934 | FILE *config = NULL; |
aa0b6932 | 935 | |
b03d27bd JB |
936 | if (file_name_absolute_p (server_file)) |
937 | config = fopen (server_file, "rb"); | |
938 | else | |
97e3214d | 939 | { |
7ce8671d | 940 | char *home = egetenv ("HOME"); |
88b46d84 | 941 | |
aa0b6932 JB |
942 | if (home) |
943 | { | |
bc558f3e JB |
944 | char *path = alloca (strlen (home) + strlen (server_file) |
945 | + EXTRA_SPACE); | |
aa0b6932 JB |
946 | sprintf (path, "%s/.emacs.d/server/%s", home, server_file); |
947 | config = fopen (path, "rb"); | |
948 | } | |
88b46d84 | 949 | #ifdef WINDOWSNT |
7ce8671d | 950 | if (!config && (home = egetenv ("APPDATA"))) |
88b46d84 | 951 | { |
bc558f3e JB |
952 | char *path = alloca (strlen (home) + strlen (server_file) |
953 | + EXTRA_SPACE); | |
88b46d84 JB |
954 | sprintf (path, "%s/.emacs.d/server/%s", home, server_file); |
955 | config = fopen (path, "rb"); | |
956 | } | |
957 | #endif | |
aa0b6932 JB |
958 | } |
959 | ||
960 | if (! config) | |
961 | return FALSE; | |
962 | ||
963 | if (fgets (dotted, sizeof dotted, config) | |
434a6c5d JB |
964 | && (port = strchr (dotted, ':')) |
965 | && (pid = strchr (port, ' '))) | |
aa0b6932 JB |
966 | { |
967 | *port++ = '\0'; | |
434a6c5d | 968 | *pid++ = '\0'; |
97e3214d GM |
969 | } |
970 | else | |
971 | { | |
78da39c6 | 972 | message (TRUE, "%s: invalid configuration info\n", progname); |
65396510 | 973 | exit (EXIT_FAILURE); |
97e3214d | 974 | } |
97e3214d | 975 | |
aa0b6932 JB |
976 | server->sin_family = AF_INET; |
977 | server->sin_addr.s_addr = inet_addr (dotted); | |
978 | server->sin_port = htons (atoi (port)); | |
97e3214d | 979 | |
aa0b6932 JB |
980 | if (! fread (authentication, AUTH_KEY_LENGTH, 1, config)) |
981 | { | |
78da39c6 | 982 | message (TRUE, "%s: cannot read authentication info\n", progname); |
aa0b6932 JB |
983 | exit (EXIT_FAILURE); |
984 | } | |
46cec291 | 985 | |
aa0b6932 | 986 | fclose (config); |
97e3214d | 987 | |
c66648e0 | 988 | emacs_pid = atoi (pid); |
434a6c5d | 989 | |
aa0b6932 | 990 | return TRUE; |
97e3214d GM |
991 | } |
992 | ||
aa0b6932 | 993 | HSOCKET |
873fbd0b | 994 | set_tcp_socket (void) |
aa0b6932 JB |
995 | { |
996 | HSOCKET s; | |
997 | struct sockaddr_in server; | |
aa0b6932 JB |
998 | struct linger l_arg = {1, 1}; |
999 | char auth_string[AUTH_KEY_LENGTH + 1]; | |
9628b887 | 1000 | |
aa0b6932 JB |
1001 | if (! get_server_config (&server, auth_string)) |
1002 | return INVALID_SOCKET; | |
1003 | ||
b03d27bd | 1004 | if (server.sin_addr.s_addr != inet_addr ("127.0.0.1")) |
9219db75 | 1005 | message (FALSE, "%s: connected to remote socket at %s\n", |
b03d27bd JB |
1006 | progname, inet_ntoa (server.sin_addr)); |
1007 | ||
aa0b6932 JB |
1008 | /* |
1009 | * Open up an AF_INET socket | |
1010 | */ | |
1011 | if ((s = socket (AF_INET, SOCK_STREAM, IPPROTO_TCP)) < 0) | |
1012 | { | |
d22b00e5 | 1013 | sock_err_message ("socket"); |
aa0b6932 JB |
1014 | return INVALID_SOCKET; |
1015 | } | |
1016 | ||
1017 | /* | |
1018 | * Set up the socket | |
1019 | */ | |
1020 | if (connect (s, (struct sockaddr *) &server, sizeof server) < 0) | |
1021 | { | |
d22b00e5 | 1022 | sock_err_message ("connect"); |
aa0b6932 JB |
1023 | return INVALID_SOCKET; |
1024 | } | |
1025 | ||
aa0b6932 JB |
1026 | setsockopt (s, SOL_SOCKET, SO_LINGER, (char *) &l_arg, sizeof l_arg); |
1027 | ||
1028 | /* | |
1029 | * Send the authentication | |
1030 | */ | |
1031 | auth_string[AUTH_KEY_LENGTH] = '\0'; | |
1032 | ||
486ba65f JR |
1033 | send_to_emacs (s, "-auth "); |
1034 | send_to_emacs (s, auth_string); | |
5ab73228 | 1035 | send_to_emacs (s, " "); |
aa0b6932 JB |
1036 | |
1037 | return s; | |
1038 | } | |
1039 | ||
b2ff54a0 JR |
1040 | |
1041 | /* Returns 1 if PREFIX is a prefix of STRING. */ | |
1042 | static int | |
1043 | strprefix (char *prefix, char *string) | |
1044 | { | |
cb06b8dc | 1045 | return !strncmp (prefix, string, strlen (prefix)); |
b2ff54a0 JR |
1046 | } |
1047 | ||
a336ee5b CY |
1048 | /* Get tty name and type. If successful, return the type in TTY_TYPE |
1049 | and the name in TTY_NAME, and return 1. Otherwise, fail if NOABORT | |
1050 | is zero, or return 0 if NOABORT is non-zero. */ | |
1051 | ||
1052 | int | |
1053 | find_tty (char **tty_type, char **tty_name, int noabort) | |
1054 | { | |
1055 | char *type = egetenv ("TERM"); | |
1056 | char *name = ttyname (fileno (stdout)); | |
1057 | ||
1058 | if (!name) | |
1059 | { | |
1060 | if (noabort) | |
1061 | return 0; | |
1062 | else | |
1063 | { | |
1064 | message (TRUE, "%s: could not get terminal name\n", progname); | |
1065 | fail (); | |
1066 | } | |
1067 | } | |
1068 | ||
1069 | if (!type) | |
1070 | { | |
1071 | if (noabort) | |
1072 | return 0; | |
1073 | else | |
1074 | { | |
1075 | message (TRUE, "%s: please set the TERM variable to your terminal type\n", | |
1076 | progname); | |
1077 | fail (); | |
1078 | } | |
1079 | } | |
1080 | ||
1081 | if (strcmp (type, "eterm") == 0) | |
1082 | { | |
1083 | if (noabort) | |
1084 | return 0; | |
1085 | else | |
1086 | { | |
1087 | /* This causes nasty, MULTI_KBOARD-related input lockouts. */ | |
1088 | message (TRUE, "%s: opening a frame in an Emacs term buffer" | |
1089 | " is not supported\n", progname); | |
1090 | fail (); | |
1091 | } | |
1092 | } | |
1093 | ||
1094 | *tty_name = name; | |
1095 | *tty_type = type; | |
1096 | return 1; | |
1097 | } | |
1098 | ||
b2ff54a0 | 1099 | |
aa0b6932 | 1100 | #if !defined (NO_SOCKETS_IN_FILE_SYSTEM) |
46cec291 | 1101 | |
9f637eea GM |
1102 | /* Three possibilities: |
1103 | 2 - can't be `stat'ed (sets errno) | |
1104 | 1 - isn't owned by us | |
1105 | 0 - success: none of the above */ | |
1106 | ||
1107 | static int | |
873fbd0b | 1108 | socket_status (char *socket_name) |
9f637eea GM |
1109 | { |
1110 | struct stat statbfr; | |
1111 | ||
1112 | if (stat (socket_name, &statbfr) == -1) | |
1113 | return 2; | |
1114 | ||
1115 | if (statbfr.st_uid != geteuid ()) | |
1116 | return 1; | |
0b0d3e0b | 1117 | |
9f637eea GM |
1118 | return 0; |
1119 | } | |
1120 | ||
974b73e8 | 1121 | \f |
da8e1115 KL |
1122 | /* A signal handler that passes the signal to the Emacs process. |
1123 | Useful for SIGWINCH. */ | |
1124 | ||
9628b887 | 1125 | SIGTYPE |
428a555e | 1126 | pass_signal_to_emacs (int signalnum) |
9628b887 KL |
1127 | { |
1128 | int old_errno = errno; | |
1129 | ||
9f729af5 | 1130 | if (emacs_pid) |
428a555e | 1131 | kill (emacs_pid, signalnum); |
9f729af5 | 1132 | |
428a555e | 1133 | signal (signalnum, pass_signal_to_emacs); |
9f729af5 KL |
1134 | errno = old_errno; |
1135 | } | |
1136 | ||
0b0d3e0b KL |
1137 | /* Signal handler for SIGCONT; notify the Emacs process that it can |
1138 | now resume our tty frame. */ | |
1139 | ||
1140 | SIGTYPE | |
1141 | handle_sigcont (int signalnum) | |
1142 | { | |
1143 | int old_errno = errno; | |
1144 | ||
1145 | if (tcgetpgrp (1) == getpgrp ()) | |
1146 | { | |
1147 | /* We are in the foreground. */ | |
486ba65f | 1148 | send_to_emacs (emacs_socket, "-resume \n"); |
0b0d3e0b KL |
1149 | } |
1150 | else | |
1151 | { | |
1152 | /* We are in the background; cancel the continue. */ | |
1153 | kill (getpid (), SIGSTOP); | |
1154 | } | |
c6c53c3e KL |
1155 | |
1156 | signal (signalnum, handle_sigcont); | |
0b0d3e0b KL |
1157 | errno = old_errno; |
1158 | } | |
1159 | ||
1160 | /* Signal handler for SIGTSTP; notify the Emacs process that we are | |
1161 | going to sleep. Normally the suspend is initiated by Emacs via | |
1162 | server-handle-suspend-tty, but if the server gets out of sync with | |
1163 | reality, we may get a SIGTSTP on C-z. Handling this signal and | |
1164 | notifying Emacs about it should get things under control again. */ | |
1165 | ||
1166 | SIGTYPE | |
1167 | handle_sigtstp (int signalnum) | |
1168 | { | |
1169 | int old_errno = errno; | |
1170 | sigset_t set; | |
c0f342ab | 1171 | |
90843190 | 1172 | if (emacs_socket) |
486ba65f | 1173 | send_to_emacs (emacs_socket, "-suspend \n"); |
0b0d3e0b | 1174 | |
5ab73228 | 1175 | /* Unblock this signal and call the default handler by temporarily |
0b0d3e0b KL |
1176 | changing the handler and resignalling. */ |
1177 | sigprocmask (SIG_BLOCK, NULL, &set); | |
1178 | sigdelset (&set, signalnum); | |
1179 | signal (signalnum, SIG_DFL); | |
1180 | kill (getpid (), signalnum); | |
1181 | sigprocmask (SIG_SETMASK, &set, NULL); /* Let's the above signal through. */ | |
1182 | signal (signalnum, handle_sigtstp); | |
1183 | ||
1184 | errno = old_errno; | |
1185 | } | |
273b9028 CY |
1186 | |
1187 | ||
da8e1115 | 1188 | /* Set up signal handlers before opening a frame on the current tty. */ |
0b0d3e0b | 1189 | |
4d553a13 KL |
1190 | void |
1191 | init_signals (void) | |
9628b887 KL |
1192 | { |
1193 | /* Set up signal handlers. */ | |
428a555e | 1194 | signal (SIGWINCH, pass_signal_to_emacs); |
4ca927b4 KL |
1195 | |
1196 | /* Don't pass SIGINT and SIGQUIT to Emacs, because it has no way of | |
1197 | deciding which terminal the signal came from. C-g is now a | |
1198 | normal input event on secondary terminals. */ | |
1199 | #if 0 | |
428a555e KL |
1200 | signal (SIGINT, pass_signal_to_emacs); |
1201 | signal (SIGQUIT, pass_signal_to_emacs); | |
4ca927b4 | 1202 | #endif |
0b0d3e0b KL |
1203 | |
1204 | signal (SIGCONT, handle_sigcont); | |
1205 | signal (SIGTSTP, handle_sigtstp); | |
1206 | signal (SIGTTOU, handle_sigtstp); | |
9628b887 KL |
1207 | } |
1208 | ||
46cec291 | 1209 | |
aa0b6932 | 1210 | HSOCKET |
873fbd0b | 1211 | set_local_socket (void) |
46cec291 | 1212 | { |
aa0b6932 | 1213 | HSOCKET s; |
46cec291 | 1214 | struct sockaddr_un server; |
46cec291 | 1215 | |
e69233c2 | 1216 | /* |
46cec291 RS |
1217 | * Open up an AF_UNIX socket in this person's home directory |
1218 | */ | |
1219 | ||
1220 | if ((s = socket (AF_UNIX, SOCK_STREAM, 0)) < 0) | |
1221 | { | |
42073bfb | 1222 | message (TRUE, "%s: socket: %s\n", progname, strerror (errno)); |
aa0b6932 | 1223 | return INVALID_SOCKET; |
46cec291 | 1224 | } |
e69233c2 | 1225 | |
46cec291 | 1226 | server.sun_family = AF_UNIX; |
c5fee545 | 1227 | |
c5fee545 | 1228 | { |
9f637eea | 1229 | int sock_status = 0; |
5c9659d3 | 1230 | int default_sock = !socket_name; |
b80bf66e | 1231 | int saved_errno = 0; |
0734b0d0 | 1232 | char *server_name = "server"; |
f77b11a0 | 1233 | char *tmpdir; |
0b0d3e0b | 1234 | |
8966b757 AS |
1235 | if (socket_name && !strchr (socket_name, '/') |
1236 | && !strchr (socket_name, '\\')) | |
1237 | { | |
1238 | /* socket_name is a file name component. */ | |
d3a6748c KL |
1239 | server_name = socket_name; |
1240 | socket_name = NULL; | |
1241 | default_sock = 1; /* Try both UIDs. */ | |
0734b0d0 | 1242 | } |
efb859b4 | 1243 | |
5c9659d3 | 1244 | if (default_sock) |
254107e4 | 1245 | { |
f77b11a0 JB |
1246 | tmpdir = egetenv ("TMPDIR"); |
1247 | if (!tmpdir) | |
1248 | tmpdir = "/tmp"; | |
bc558f3e JB |
1249 | socket_name = alloca (strlen (tmpdir) + strlen (server_name) |
1250 | + EXTRA_SPACE); | |
f77b11a0 JB |
1251 | sprintf (socket_name, "%s/emacs%d/%s", |
1252 | tmpdir, (int) geteuid (), server_name); | |
254107e4 RS |
1253 | } |
1254 | ||
1255 | if (strlen (socket_name) < sizeof (server.sun_path)) | |
1256 | strcpy (server.sun_path, socket_name); | |
1257 | else | |
819b8f00 | 1258 | { |
78da39c6 | 1259 | message (TRUE, "%s: socket-name %s too long\n", |
974b73e8 | 1260 | progname, socket_name); |
819b8f00 KL |
1261 | fail (); |
1262 | } | |
efb859b4 | 1263 | |
9f637eea GM |
1264 | /* See if the socket exists, and if it's owned by us. */ |
1265 | sock_status = socket_status (server.sun_path); | |
152b6e83 | 1266 | saved_errno = errno; |
5c9659d3 | 1267 | if (sock_status && default_sock) |
efb859b4 | 1268 | { |
9f637eea GM |
1269 | /* Failing that, see if LOGNAME or USER exist and differ from |
1270 | our euid. If so, look for a socket based on the UID | |
1271 | associated with the name. This is reminiscent of the logic | |
1272 | that init_editfns uses to set the global Vuser_full_name. */ | |
e69233c2 | 1273 | |
7ce8671d | 1274 | char *user_name = (char *) egetenv ("LOGNAME"); |
293f9f2a | 1275 | |
9f637eea | 1276 | if (!user_name) |
7ce8671d | 1277 | user_name = (char *) egetenv ("USER"); |
e69233c2 | 1278 | |
9f637eea GM |
1279 | if (user_name) |
1280 | { | |
1281 | struct passwd *pw = getpwnam (user_name); | |
293f9f2a | 1282 | |
9f637eea GM |
1283 | if (pw && (pw->pw_uid != geteuid ())) |
1284 | { | |
1285 | /* We're running under su, apparently. */ | |
bc558f3e JB |
1286 | socket_name = alloca (strlen (tmpdir) + strlen (server_name) |
1287 | + EXTRA_SPACE); | |
f77b11a0 JB |
1288 | sprintf (socket_name, "%s/emacs%d/%s", |
1289 | tmpdir, (int) pw->pw_uid, server_name); | |
5c9659d3 SM |
1290 | |
1291 | if (strlen (socket_name) < sizeof (server.sun_path)) | |
1292 | strcpy (server.sun_path, socket_name); | |
1293 | else | |
1294 | { | |
78da39c6 | 1295 | message (TRUE, "%s: socket-name %s too long\n", |
aa0b6932 | 1296 | progname, socket_name); |
65396510 | 1297 | exit (EXIT_FAILURE); |
5c9659d3 SM |
1298 | } |
1299 | ||
9f637eea | 1300 | sock_status = socket_status (server.sun_path); |
b80bf66e | 1301 | saved_errno = errno; |
9f637eea | 1302 | } |
293f9f2a RS |
1303 | else |
1304 | errno = saved_errno; | |
9f637eea | 1305 | } |
efb859b4 | 1306 | } |
e69233c2 | 1307 | |
aa0b6932 JB |
1308 | switch (sock_status) |
1309 | { | |
1310 | case 1: | |
974b73e8 KL |
1311 | /* There's a socket, but it isn't owned by us. This is OK if |
1312 | we are root. */ | |
1313 | if (0 != geteuid ()) | |
1314 | { | |
1315 | message (TRUE, "%s: Invalid socket owner\n", progname); | |
aa0b6932 | 1316 | return INVALID_SOCKET; |
974b73e8 KL |
1317 | } |
1318 | break; | |
aa0b6932 JB |
1319 | |
1320 | case 2: | |
974b73e8 KL |
1321 | /* `stat' failed */ |
1322 | if (saved_errno == ENOENT) | |
1323 | message (TRUE, | |
1324 | "%s: can't find socket; have you started the server?\n\ | |
45adde32 | 1325 | To start the server in Emacs, type \"M-x server-start\".\n", |
aa0b6932 | 1326 | progname); |
974b73e8 KL |
1327 | else |
1328 | message (TRUE, "%s: can't stat %s: %s\n", | |
aa0b6932 | 1329 | progname, server.sun_path, strerror (saved_errno)); |
974b73e8 | 1330 | return INVALID_SOCKET; |
aa0b6932 | 1331 | } |
efb859b4 | 1332 | } |
46cec291 | 1333 | |
4e23f2ba JB |
1334 | if (connect (s, (struct sockaddr *) &server, strlen (server.sun_path) + 2) |
1335 | < 0) | |
46cec291 | 1336 | { |
42073bfb | 1337 | message (TRUE, "%s: connect: %s\n", progname, strerror (errno)); |
aa0b6932 | 1338 | return INVALID_SOCKET; |
46cec291 | 1339 | } |
23a7488d | 1340 | |
aa0b6932 JB |
1341 | return s; |
1342 | } | |
1343 | #endif /* ! NO_SOCKETS_IN_FILE_SYSTEM */ | |
1344 | ||
1345 | HSOCKET | |
636b507b | 1346 | set_socket (int no_exit_if_error) |
aa0b6932 | 1347 | { |
b03d27bd | 1348 | HSOCKET s; |
c0f342ab | 1349 | |
b03d27bd | 1350 | INITIALIZE (); |
c0f342ab | 1351 | |
aa0b6932 | 1352 | #ifndef NO_SOCKETS_IN_FILE_SYSTEM |
b03d27bd JB |
1353 | /* Explicit --socket-name argument. */ |
1354 | if (socket_name) | |
46cec291 | 1355 | { |
b03d27bd | 1356 | s = set_local_socket (); |
636b507b | 1357 | if ((s != INVALID_SOCKET) || no_exit_if_error) |
974b73e8 | 1358 | return s; |
355a326e | 1359 | message (TRUE, "%s: error accessing socket \"%s\"\n", |
974b73e8 | 1360 | progname, socket_name); |
b03d27bd | 1361 | exit (EXIT_FAILURE); |
46cec291 | 1362 | } |
b03d27bd JB |
1363 | #endif |
1364 | ||
1365 | /* Explicit --server-file arg or EMACS_SERVER_FILE variable. */ | |
1366 | if (!server_file) | |
7ce8671d | 1367 | server_file = egetenv ("EMACS_SERVER_FILE"); |
46cec291 | 1368 | |
b03d27bd | 1369 | if (server_file) |
23a7488d | 1370 | { |
b03d27bd | 1371 | s = set_tcp_socket (); |
636b507b | 1372 | if ((s != INVALID_SOCKET) || no_exit_if_error) |
974b73e8 | 1373 | return s; |
c0f342ab | 1374 | |
78da39c6 | 1375 | message (TRUE, "%s: error accessing server file \"%s\"\n", |
974b73e8 | 1376 | progname, server_file); |
b03d27bd | 1377 | exit (EXIT_FAILURE); |
23a7488d | 1378 | } |
c0f342ab | 1379 | |
b03d27bd JB |
1380 | #ifndef NO_SOCKETS_IN_FILE_SYSTEM |
1381 | /* Implicit local socket. */ | |
1382 | s = set_local_socket (); | |
1383 | if (s != INVALID_SOCKET) | |
1384 | return s; | |
1385 | #endif | |
23a7488d | 1386 | |
b03d27bd JB |
1387 | /* Implicit server file. */ |
1388 | server_file = "server"; | |
1389 | s = set_tcp_socket (); | |
636b507b | 1390 | if ((s != INVALID_SOCKET) || no_exit_if_error) |
b03d27bd JB |
1391 | return s; |
1392 | ||
1393 | /* No implicit or explicit socket, and no alternate editor. */ | |
42073bfb | 1394 | message (TRUE, "%s: No socket or alternate editor. Please use:\n\n" |
b03d27bd JB |
1395 | #ifndef NO_SOCKETS_IN_FILE_SYSTEM |
1396 | "\t--socket-name\n" | |
ee6a193c | 1397 | #endif |
b03d27bd JB |
1398 | "\t--server-file (or environment variable EMACS_SERVER_FILE)\n\ |
1399 | \t--alternate-editor (or environment variable ALTERNATE_EDITOR)\n", | |
1400 | progname); | |
1401 | exit (EXIT_FAILURE); | |
aa0b6932 | 1402 | } |
46cec291 | 1403 | |
0e0dced5 JB |
1404 | #ifdef WINDOWSNT |
1405 | FARPROC set_fg; /* Pointer to AllowSetForegroundWindow. */ | |
1406 | FARPROC get_wc; /* Pointer to RealGetWindowClassA. */ | |
1407 | ||
1408 | BOOL CALLBACK | |
7c3320d8 | 1409 | w32_find_emacs_process (HWND hWnd, LPARAM lParam) |
0e0dced5 JB |
1410 | { |
1411 | DWORD pid; | |
1412 | char class[6]; | |
1413 | ||
1414 | /* Reject any window not of class "Emacs". */ | |
1415 | if (! get_wc (hWnd, class, sizeof (class)) | |
1416 | || strcmp (class, "Emacs")) | |
1417 | return TRUE; | |
1418 | ||
1419 | /* We only need the process id, not the thread id. */ | |
1420 | (void) GetWindowThreadProcessId (hWnd, &pid); | |
1421 | ||
1422 | /* Not the one we're looking for. */ | |
1423 | if (pid != (DWORD) emacs_pid) return TRUE; | |
1424 | ||
1425 | /* OK, let's raise it. */ | |
1426 | set_fg (emacs_pid); | |
1427 | ||
1428 | /* Stop enumeration. */ | |
1429 | return FALSE; | |
1430 | } | |
1431 | ||
1432 | /* | |
1433 | * Search for a window of class "Emacs" and owned by a process with | |
1434 | * process id = emacs_pid. If found, allow it to grab the focus. | |
1435 | */ | |
1436 | void | |
7c3320d8 | 1437 | w32_give_focus (void) |
0e0dced5 | 1438 | { |
ff90fbde | 1439 | HANDLE user32; |
0e0dced5 | 1440 | |
71b8f735 | 1441 | /* It shouldn't happen when dealing with TCP sockets. */ |
0e0dced5 JB |
1442 | if (!emacs_pid) return; |
1443 | ||
ff90fbde JR |
1444 | user32 = GetModuleHandle ("user32.dll"); |
1445 | ||
1446 | if (!user32) | |
1447 | return; | |
0e0dced5 JB |
1448 | |
1449 | /* Modern Windows restrict which processes can set the foreground window. | |
1450 | emacsclient can allow Emacs to grab the focus by calling the function | |
1451 | AllowSetForegroundWindow. Unfortunately, older Windows (W95, W98 and | |
1452 | NT) lack this function, so we have to check its availability. */ | |
ff90fbde JR |
1453 | if ((set_fg = GetProcAddress (user32, "AllowSetForegroundWindow")) |
1454 | && (get_wc = GetProcAddress (user32, "RealGetWindowClassA"))) | |
0e0dced5 | 1455 | EnumWindows (w32_find_emacs_process, (LPARAM) 0); |
0e0dced5 JB |
1456 | } |
1457 | #endif | |
1458 | ||
636b507b DN |
1459 | /* Start the emacs daemon and try to connect to it. */ |
1460 | ||
1461 | void | |
1462 | start_daemon_and_retry_set_socket (void) | |
1463 | { | |
802bdb3c | 1464 | #ifndef WINDOWSNT |
636b507b DN |
1465 | pid_t dpid; |
1466 | int status; | |
636b507b DN |
1467 | |
1468 | dpid = fork (); | |
1469 | ||
1470 | if (dpid > 0) | |
1471 | { | |
fd95644b DN |
1472 | pid_t w; |
1473 | w = waitpid (dpid, &status, WUNTRACED | WCONTINUED); | |
636b507b | 1474 | |
361358ea | 1475 | if ((w == -1) || !WIFEXITED (status) || WEXITSTATUS (status)) |
fd95644b DN |
1476 | { |
1477 | message (TRUE, "Error: Could not start the Emacs daemon\n"); | |
1478 | exit (EXIT_FAILURE); | |
1479 | } | |
1480 | ||
1481 | /* Try connecting, the daemon should have started by now. */ | |
1482 | message (TRUE, "Emacs daemon should have started, trying to connect again\n"); | |
636b507b | 1483 | if ((emacs_socket = set_socket (1)) == INVALID_SOCKET) |
fd95644b DN |
1484 | { |
1485 | message (TRUE, "Error: Cannot connect even after starting the Emacs daemon\n"); | |
1486 | exit (EXIT_FAILURE); | |
1487 | } | |
636b507b DN |
1488 | } |
1489 | else if (dpid < 0) | |
1490 | { | |
fd95644b | 1491 | fprintf (stderr, "Error: Cannot fork!\n"); |
636b507b DN |
1492 | exit (1); |
1493 | } | |
1494 | else | |
1495 | { | |
1496 | char *d_argv[] = {"emacs", "--daemon", 0 }; | |
1497 | if (socket_name != NULL) | |
1498 | { | |
1499 | /* Pass --daemon=socket_name as argument. */ | |
1500 | char *deq = "--daemon="; | |
1501 | char *daemon_arg = alloca (strlen (deq) | |
1502 | + strlen (socket_name) + 1); | |
1503 | strcpy (daemon_arg, deq); | |
1504 | strcat (daemon_arg, socket_name); | |
1505 | d_argv[1] = daemon_arg; | |
1506 | } | |
1507 | execvp ("emacs", d_argv); | |
1508 | message (TRUE, "%s: error starting emacs daemon\n", progname); | |
1509 | } | |
802bdb3c | 1510 | #endif /* WINDOWSNT */ |
636b507b DN |
1511 | } |
1512 | ||
aa0b6932 | 1513 | int |
873fbd0b | 1514 | main (int argc, char **argv) |
aa0b6932 | 1515 | { |
aa0b6932 | 1516 | int i, rl, needlf = 0; |
974b73e8 | 1517 | char *cwd, *str; |
aa0b6932 | 1518 | char string[BUFSIZ+1]; |
802bdb3c | 1519 | int null_socket_name, null_server_file, start_daemon_if_needed; |
aa0b6932 | 1520 | |
974b73e8 | 1521 | main_argv = argv; |
aa0b6932 JB |
1522 | progname = argv[0]; |
1523 | ||
ff90fbde JR |
1524 | #ifdef WINDOWSNT |
1525 | /* On Windows 7 and later, we need to explicitly associate emacsclient | |
1526 | with emacs so the UI behaves sensibly. */ | |
1527 | w32_set_user_model_id (); | |
1528 | #endif | |
1529 | ||
aa0b6932 JB |
1530 | /* Process options. */ |
1531 | decode_options (argc, argv); | |
1532 | ||
273b9028 | 1533 | if ((argc - optind < 1) && !eval && current_frame) |
23a7488d | 1534 | { |
974b73e8 KL |
1535 | message (TRUE, "%s: file name or argument required\n" |
1536 | "Try `%s --help' for more information\n", | |
1537 | progname, progname); | |
aa0b6932 | 1538 | exit (EXIT_FAILURE); |
23a7488d RS |
1539 | } |
1540 | ||
636b507b DN |
1541 | /* If alternate_editor is the empty string, start the emacs daemon |
1542 | in case of failure to connect. */ | |
1543 | start_daemon_if_needed = (alternate_editor | |
1544 | && (alternate_editor[0] == '\0')); | |
1545 | if (start_daemon_if_needed) | |
1546 | { | |
1547 | /* set_socket changes the values for socket_name and | |
1548 | server_file, we need to reset them, if they were NULL before | |
1549 | for the second call to set_socket. */ | |
1550 | null_socket_name = (socket_name == NULL); | |
1551 | null_server_file = (server_file == NULL); | |
1552 | } | |
aa0b6932 | 1553 | |
636b507b DN |
1554 | if ((emacs_socket = set_socket (alternate_editor |
1555 | || start_daemon_if_needed)) == INVALID_SOCKET) | |
1556 | if (start_daemon_if_needed) | |
1557 | { | |
1558 | /* Reset socket_name and server_file if they were NULL | |
1559 | before the set_socket call. */ | |
1560 | if (null_socket_name) | |
1561 | socket_name = NULL; | |
1562 | if (null_server_file) | |
1563 | server_file = NULL; | |
1564 | ||
1565 | start_daemon_and_retry_set_socket (); | |
1566 | } | |
1567 | else | |
1568 | fail (); | |
974b73e8 KL |
1569 | |
1570 | cwd = get_current_dir_name (); | |
46cec291 RS |
1571 | if (cwd == 0) |
1572 | { | |
1573 | /* getwd puts message in STRING if it fails. */ | |
974b73e8 KL |
1574 | message (TRUE, "%s: %s\n", progname, |
1575 | "Cannot get current working directory"); | |
819b8f00 | 1576 | fail (); |
46cec291 RS |
1577 | } |
1578 | ||
c66648e0 | 1579 | #ifdef WINDOWSNT |
0e0dced5 | 1580 | w32_give_focus (); |
c66648e0 JB |
1581 | #endif |
1582 | ||
273b9028 | 1583 | /* Send over our environment and current directory. */ |
59e085e0 KL |
1584 | if (!current_frame) |
1585 | { | |
1586 | extern char **environ; | |
1587 | int i; | |
1588 | for (i = 0; environ[i]; i++) | |
1589 | { | |
1590 | char *name = xstrdup (environ[i]); | |
1591 | char *value = strchr (name, '='); | |
486ba65f JR |
1592 | send_to_emacs (emacs_socket, "-env "); |
1593 | quote_argument (emacs_socket, environ[i]); | |
1594 | send_to_emacs (emacs_socket, " "); | |
59e085e0 | 1595 | } |
2828d5f9 | 1596 | } |
ba528748 SM |
1597 | send_to_emacs (emacs_socket, "-dir "); |
1598 | quote_argument (emacs_socket, cwd); | |
1599 | send_to_emacs (emacs_socket, "/"); | |
1600 | send_to_emacs (emacs_socket, " "); | |
2828d5f9 | 1601 | |
6afdd335 | 1602 | retry: |
5212210c | 1603 | if (nowait) |
486ba65f | 1604 | send_to_emacs (emacs_socket, "-nowait "); |
292d74a3 | 1605 | |
92071250 | 1606 | if (current_frame) |
486ba65f | 1607 | send_to_emacs (emacs_socket, "-current-frame "); |
c0f342ab | 1608 | |
30be2360 | 1609 | if (display) |
87209357 | 1610 | { |
486ba65f JR |
1611 | send_to_emacs (emacs_socket, "-display "); |
1612 | quote_argument (emacs_socket, display); | |
1613 | send_to_emacs (emacs_socket, " "); | |
87209357 | 1614 | } |
30be2360 | 1615 | |
0191e222 CY |
1616 | if (parent_id) |
1617 | { | |
1618 | send_to_emacs (emacs_socket, "-parent-id "); | |
1619 | quote_argument (emacs_socket, parent_id); | |
1620 | send_to_emacs (emacs_socket, " "); | |
1621 | } | |
1622 | ||
8536c0f5 CY |
1623 | /* If using the current frame, send tty information to Emacs anyway. |
1624 | In daemon mode, Emacs may need to occupy this tty if no other | |
1625 | frame is available. */ | |
322ca650 | 1626 | if (tty || (current_frame && !eval)) |
9628b887 | 1627 | { |
273b9028 | 1628 | char *tty_type, *tty_name; |
0b0d3e0b | 1629 | |
273b9028 CY |
1630 | if (find_tty (&tty_type, &tty_name, !tty)) |
1631 | { | |
b2ff54a0 | 1632 | #if !defined (NO_SOCKETS_IN_FILE_SYSTEM) |
273b9028 | 1633 | init_signals (); |
b2ff54a0 | 1634 | #endif |
273b9028 CY |
1635 | send_to_emacs (emacs_socket, "-tty "); |
1636 | quote_argument (emacs_socket, tty_name); | |
1637 | send_to_emacs (emacs_socket, " "); | |
1638 | quote_argument (emacs_socket, tty_type); | |
1639 | send_to_emacs (emacs_socket, " "); | |
1640 | } | |
9628b887 | 1641 | } |
77134727 | 1642 | |
273b9028 | 1643 | if (!current_frame && !tty) |
486ba65f | 1644 | send_to_emacs (emacs_socket, "-window-system "); |
0b0d3e0b | 1645 | |
87209357 | 1646 | if ((argc - optind > 0)) |
5212210c | 1647 | { |
87209357 | 1648 | for (i = optind; i < argc; i++) |
46cec291 | 1649 | { |
0b0d3e0b | 1650 | |
87209357 | 1651 | if (eval) |
0b0d3e0b | 1652 | { |
974b73e8 | 1653 | /* Don't prepend cwd or anything like that. */ |
486ba65f JR |
1654 | send_to_emacs (emacs_socket, "-eval "); |
1655 | quote_argument (emacs_socket, argv[i]); | |
1656 | send_to_emacs (emacs_socket, " "); | |
0b0d3e0b KL |
1657 | continue; |
1658 | } | |
1659 | ||
1660 | if (*argv[i] == '+') | |
1661 | { | |
87209357 EZ |
1662 | char *p = argv[i] + 1; |
1663 | while (isdigit ((unsigned char) *p) || *p == ':') p++; | |
0b0d3e0b KL |
1664 | if (*p == 0) |
1665 | { | |
486ba65f JR |
1666 | send_to_emacs (emacs_socket, "-position "); |
1667 | quote_argument (emacs_socket, argv[i]); | |
1668 | send_to_emacs (emacs_socket, " "); | |
0b0d3e0b KL |
1669 | continue; |
1670 | } | |
0b0d3e0b | 1671 | } |
6cde1b21 JB |
1672 | #ifdef WINDOWSNT |
1673 | else if (! file_name_absolute_p (argv[i]) | |
1674 | && (isalpha (argv[i][0]) && argv[i][1] == ':')) | |
1675 | /* Windows can have a different default directory for each | |
1676 | drive, so the cwd passed via "-dir" is not sufficient | |
1677 | to account for that. | |
1678 | If the user uses <drive>:<relpath>, we hence need to be | |
1679 | careful to expand <relpath> with the default directory | |
1680 | corresponding to <drive>. */ | |
1681 | { | |
1682 | char *filename = (char *) xmalloc (MAX_PATH); | |
1683 | DWORD size; | |
1684 | ||
1685 | size = GetFullPathName (argv[i], MAX_PATH, filename, NULL); | |
1686 | if (size > 0 && size < MAX_PATH) | |
1687 | argv[i] = filename; | |
1688 | else | |
1689 | free (filename); | |
1690 | } | |
1691 | #endif | |
0b0d3e0b | 1692 | |
486ba65f | 1693 | send_to_emacs (emacs_socket, "-file "); |
486ba65f JR |
1694 | quote_argument (emacs_socket, argv[i]); |
1695 | send_to_emacs (emacs_socket, " "); | |
0b0d3e0b | 1696 | } |
46cec291 | 1697 | } |
273b9028 | 1698 | else if (eval) |
87209357 | 1699 | { |
273b9028 CY |
1700 | /* Read expressions interactively. */ |
1701 | while ((str = fgets (string, BUFSIZ, stdin))) | |
1702 | { | |
1703 | send_to_emacs (emacs_socket, "-eval "); | |
1704 | quote_argument (emacs_socket, str); | |
1705 | } | |
1706 | send_to_emacs (emacs_socket, " "); | |
87209357 | 1707 | } |
0b0d3e0b | 1708 | |
486ba65f | 1709 | send_to_emacs (emacs_socket, "\n"); |
46cec291 | 1710 | |
fc2040c0 KL |
1711 | /* Wait for an answer. */ |
1712 | if (!eval && !tty && !nowait) | |
30be2360 SM |
1713 | { |
1714 | printf ("Waiting for Emacs..."); | |
1715 | needlf = 2; | |
1716 | } | |
46cec291 | 1717 | fflush (stdout); |
0b0d3e0b | 1718 | fsync (1); |
46cec291 | 1719 | |
3cf8c6aa | 1720 | /* Now, wait for an answer and print any messages. */ |
4b7b77f6 | 1721 | while ((rl = recv (emacs_socket, string, BUFSIZ, 0)) > 0) |
3cf8c6aa | 1722 | { |
974b73e8 KL |
1723 | char *p; |
1724 | string[rl] = '\0'; | |
1725 | ||
1726 | p = string + strlen (string) - 1; | |
1727 | while (p > string && *p == '\n') | |
0b0d3e0b KL |
1728 | *p-- = 0; |
1729 | ||
31fa6595 | 1730 | if (strprefix ("-emacs-pid ", string)) |
4d553a13 | 1731 | { |
6afdd335 | 1732 | /* -emacs-pid PID: The process id of the Emacs process. */ |
77134727 KL |
1733 | emacs_pid = strtol (string + strlen ("-emacs-pid"), NULL, 10); |
1734 | } | |
974b73e8 | 1735 | else if (strprefix ("-window-system-unsupported ", string)) |
6afdd335 KL |
1736 | { |
1737 | /* -window-system-unsupported: Emacs was compiled without X | |
1738 | support. Try again on the terminal. */ | |
6afdd335 KL |
1739 | nowait = 0; |
1740 | tty = 1; | |
1741 | goto retry; | |
1742 | } | |
974b73e8 | 1743 | else if (strprefix ("-print ", string)) |
77134727 | 1744 | { |
6afdd335 | 1745 | /* -print STRING: Print STRING on the terminal. */ |
974b73e8 | 1746 | str = unquote_argument (string + strlen ("-print ")); |
0b0d3e0b | 1747 | if (needlf) |
77134727 | 1748 | printf ("\n"); |
0b0d3e0b KL |
1749 | printf ("%s", str); |
1750 | needlf = str[0] == '\0' ? needlf : str[strlen (str) - 1] != '\n'; | |
77134727 | 1751 | } |
974b73e8 | 1752 | else if (strprefix ("-error ", string)) |
77134727 | 1753 | { |
6afdd335 | 1754 | /* -error DESCRIPTION: Signal an error on the terminal. */ |
974b73e8 | 1755 | str = unquote_argument (string + strlen ("-error ")); |
0b0d3e0b KL |
1756 | if (needlf) |
1757 | printf ("\n"); | |
974b73e8 | 1758 | fprintf (stderr, "*ERROR*: %s", str); |
0b0d3e0b KL |
1759 | needlf = str[0] == '\0' ? needlf : str[strlen (str) - 1] != '\n'; |
1760 | } | |
c801ad51 | 1761 | #ifdef SIGSTOP |
382707ec | 1762 | else if (strprefix ("-suspend ", string)) |
0b0d3e0b | 1763 | { |
6afdd335 | 1764 | /* -suspend: Suspend this terminal, i.e., stop the process. */ |
0b0d3e0b | 1765 | if (needlf) |
77134727 | 1766 | printf ("\n"); |
0b0d3e0b KL |
1767 | needlf = 0; |
1768 | kill (0, SIGSTOP); | |
4d553a13 | 1769 | } |
b2ff54a0 | 1770 | #endif |
4d553a13 KL |
1771 | else |
1772 | { | |
6afdd335 | 1773 | /* Unknown command. */ |
0b0d3e0b | 1774 | if (needlf) |
4d553a13 | 1775 | printf ("\n"); |
974b73e8 KL |
1776 | printf ("*ERROR*: Unknown message: %s", string); |
1777 | needlf = string[0] == '\0' ? needlf : string[strlen (string) - 1] != '\n'; | |
4d553a13 | 1778 | } |
3cf8c6aa SM |
1779 | } |
1780 | ||
1781 | if (needlf) | |
1782 | printf ("\n"); | |
1783 | fflush (stdout); | |
0b0d3e0b | 1784 | fsync (1); |
23a7488d | 1785 | |
4b7b77f6 | 1786 | CLOSE_SOCKET (emacs_socket); |
65396510 | 1787 | return EXIT_SUCCESS; |
46cec291 RS |
1788 | } |
1789 | ||
1e7823d0 | 1790 | #endif /* HAVE_SOCKETS && HAVE_INET_SOCKETS */ |
aa0b6932 | 1791 | |
27711600 RM |
1792 | \f |
1793 | #ifndef HAVE_STRERROR | |
1794 | char * | |
1795 | strerror (errnum) | |
1796 | int errnum; | |
1797 | { | |
1798 | extern char *sys_errlist[]; | |
1799 | extern int sys_nerr; | |
1800 | ||
1801 | if (errnum >= 0 && errnum < sys_nerr) | |
1802 | return sys_errlist[errnum]; | |
1803 | return (char *) "Unknown error"; | |
1804 | } | |
1805 | ||
1806 | #endif /* ! HAVE_STRERROR */ | |
ab5796a9 MB |
1807 | |
1808 | /* arch-tag: f39bb9c4-73eb-477e-896d-50832e2ca9a7 | |
1809 | (do not change this comment) */ | |
65396510 TTN |
1810 | |
1811 | /* emacsclient.c ends here */ |