Commit | Line | Data |
---|---|---|
efb859b4 | 1 | /* Client process that communicates with GNU Emacs acting as server. |
acaf905b | 2 | Copyright (C) 1986-1987, 1994, 1999-2012 Free Software Foundation, Inc. |
46cec291 RS |
3 | |
4 | This file is part of GNU Emacs. | |
5 | ||
294981c7 | 6 | GNU Emacs is free software: you can redistribute it and/or modify |
46cec291 | 7 | it under the terms of the GNU General Public License as published by |
294981c7 GM |
8 | the Free Software Foundation, either version 3 of the License, or |
9 | (at your option) any later version. | |
46cec291 RS |
10 | |
11 | GNU Emacs is distributed in the hope that it will be useful, | |
12 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
14 | GNU General Public License for more details. | |
15 | ||
16 | You should have received a copy of the GNU General Public License | |
294981c7 | 17 | along with GNU Emacs. If not, see <http://www.gnu.org/licenses/>. */ |
46cec291 RS |
18 | |
19 | ||
2f8fe2f4 | 20 | #include <config.h> |
e69233c2 | 21 | |
aa0b6932 | 22 | #ifdef WINDOWSNT |
aa0b6932 | 23 | |
bc28de71 JB |
24 | /* config.h defines these, which disables sockets altogether! */ |
25 | # undef _WINSOCKAPI_ | |
26 | # undef _WINSOCK_H | |
27 | ||
411b80a5 JB |
28 | # include <malloc.h> |
29 | # include <stdlib.h> | |
42073bfb | 30 | # include <windows.h> |
dbf60b07 | 31 | # include <commctrl.h> |
0613f5d5 DN |
32 | # include <io.h> |
33 | # include <winsock2.h> | |
411b80a5 | 34 | |
411b80a5 JB |
35 | # define NO_SOCKETS_IN_FILE_SYSTEM |
36 | ||
aa0b6932 JB |
37 | # define HSOCKET SOCKET |
38 | # define CLOSE_SOCKET closesocket | |
aa0b6932 | 39 | # define INITIALIZE() (initialize_sockets ()) |
411b80a5 | 40 | |
728a982d DN |
41 | char *w32_getenv (char *); |
42 | #define egetenv(VAR) w32_getenv(VAR) | |
43 | ||
411b80a5 JB |
44 | #else /* !WINDOWSNT */ |
45 | ||
67c1df01 | 46 | # include "syswait.h" |
ed4a3730 | 47 | |
1e7823d0 JB |
48 | # ifdef HAVE_INET_SOCKETS |
49 | # include <netinet/in.h> | |
0613f5d5 DN |
50 | # ifdef HAVE_SOCKETS |
51 | # include <sys/types.h> | |
52 | # include <sys/socket.h> | |
53 | # include <sys/un.h> | |
54 | # endif /* HAVE_SOCKETS */ | |
1e7823d0 | 55 | # endif |
18d2ad29 | 56 | # include <arpa/inet.h> |
448d4085 | 57 | |
e35fc962 | 58 | # define INVALID_SOCKET -1 |
aa0b6932 JB |
59 | # define HSOCKET int |
60 | # define CLOSE_SOCKET close | |
aa0b6932 | 61 | # define INITIALIZE() |
411b80a5 | 62 | |
5445ab06 DN |
63 | # ifndef WCONTINUED |
64 | # define WCONTINUED 8 | |
65 | # endif | |
66 | ||
728a982d DN |
67 | #define egetenv(VAR) getenv(VAR) |
68 | ||
411b80a5 | 69 | #endif /* !WINDOWSNT */ |
aa0b6932 | 70 | |
4e23f2ba | 71 | #undef signal |
46cec291 | 72 | |
42073bfb | 73 | #include <stdarg.h> |
e69233c2 | 74 | #include <ctype.h> |
8f9aaa0a | 75 | #include <stdio.h> |
613f7bda | 76 | #include <getopt.h> |
4004364e | 77 | #include <unistd.h> |
8f9aaa0a | 78 | |
0613f5d5 | 79 | #include <pwd.h> |
dc4a4a14 | 80 | #include <sys/stat.h> |
9628b887 | 81 | #include <signal.h> |
4d553a13 | 82 | #include <errno.h> |
9628b887 | 83 | |
0613f5d5 | 84 | |
9628b887 | 85 | \f |
873fbd0b | 86 | char *getenv (const char *), *getwd (char *); |
35a7804d JB |
87 | #ifdef HAVE_GETCWD |
88 | char *(getcwd) (char *, size_t); | |
89 | #endif | |
8f9aaa0a | 90 | |
8f9aaa0a RS |
91 | #ifndef VERSION |
92 | #define VERSION "unspecified" | |
93 | #endif | |
94 | \f | |
aa0b6932 JB |
95 | |
96 | #ifndef EXIT_SUCCESS | |
97 | #define EXIT_SUCCESS 0 | |
98 | #endif | |
99 | ||
100 | #ifndef EXIT_FAILURE | |
101 | #define EXIT_FAILURE 1 | |
102 | #endif | |
103 | ||
104 | #ifndef FALSE | |
105 | #define FALSE 0 | |
106 | #endif | |
107 | ||
108 | #ifndef TRUE | |
109 | #define TRUE 1 | |
110 | #endif | |
111 | ||
bc558f3e JB |
112 | /* Additional space when allocating buffers for filenames, etc. */ |
113 | #define EXTRA_SPACE 100 | |
114 | ||
4be3dfc5 PE |
115 | /* Use this to suppress gcc's `...may be used before initialized' warnings. */ |
116 | #ifdef lint | |
117 | # define IF_LINT(Code) Code | |
118 | #else | |
119 | # define IF_LINT(Code) /* empty */ | |
120 | #endif | |
121 | ||
aa0b6932 | 122 | \f |
8f9aaa0a | 123 | /* Name used to invoke this program. */ |
728a982d | 124 | const char *progname; |
8f9aaa0a | 125 | |
0a125897 KL |
126 | /* The second argument to main. */ |
127 | char **main_argv; | |
128 | ||
749ae770 | 129 | /* Nonzero means don't wait for a response from Emacs. --no-wait. */ |
8f9aaa0a RS |
130 | int nowait = 0; |
131 | ||
0b973fc5 DW |
132 | /* Nonzero means don't print messages for successful operations. --quiet. */ |
133 | int quiet = 0; | |
134 | ||
30be2360 SM |
135 | /* Nonzero means args are expressions to be evaluated. --eval. */ |
136 | int eval = 0; | |
137 | ||
31fa6595 SM |
138 | /* Nonzero means don't open a new frame. Inverse of --create-frame. */ |
139 | int current_frame = 1; | |
92071250 | 140 | |
30be2360 | 141 | /* The display on which Emacs should work. --display. */ |
988e88ab | 142 | const char *display = NULL; |
30be2360 | 143 | |
0191e222 CY |
144 | /* The parent window ID, if we are opening a frame via XEmbed. */ |
145 | char *parent_id = NULL; | |
146 | ||
9628b887 | 147 | /* Nonzero means open a new Emacs frame on the current terminal. */ |
77134727 | 148 | int tty = 0; |
9628b887 | 149 | |
30be2360 SM |
150 | /* If non-NULL, the name of an editor to fallback to if the server |
151 | is not running. --alternate-editor. */ | |
b03d27bd | 152 | const char *alternate_editor = NULL; |
30be2360 | 153 | |
3db926be | 154 | /* If non-NULL, the filename of the UNIX socket. */ |
254107e4 RS |
155 | char *socket_name = NULL; |
156 | ||
aa0b6932 | 157 | /* If non-NULL, the filename of the authentication file. */ |
988e88ab | 158 | const char *server_file = NULL; |
aa0b6932 | 159 | |
c66648e0 JB |
160 | /* PID of the Emacs server process. */ |
161 | int emacs_pid = 0; | |
162 | ||
18a4ce5e AR |
163 | /* If non-NULL, a string that should form a frame parameter alist to |
164 | be used for the new frame */ | |
165 | const char *frame_parameters = NULL; | |
166 | ||
b23b5a5b PE |
167 | static void print_help_and_exit (void) NO_RETURN; |
168 | static void fail (void) NO_RETURN; | |
68441b90 | 169 | |
7f3bff3e | 170 | |
8f9aaa0a RS |
171 | struct option longopts[] = |
172 | { | |
749ae770 | 173 | { "no-wait", no_argument, NULL, 'n' }, |
0b973fc5 | 174 | { "quiet", no_argument, NULL, 'q' }, |
30be2360 | 175 | { "eval", no_argument, NULL, 'e' }, |
8f9aaa0a RS |
176 | { "help", no_argument, NULL, 'H' }, |
177 | { "version", no_argument, NULL, 'V' }, | |
b28c910d | 178 | { "tty", no_argument, NULL, 't' }, |
dc1cd5f7 | 179 | { "nw", no_argument, NULL, 't' }, |
31fa6595 | 180 | { "create-frame", no_argument, NULL, 'c' }, |
3cf8c6aa | 181 | { "alternate-editor", required_argument, NULL, 'a' }, |
18a4ce5e | 182 | { "frame-parameters", required_argument, NULL, 'F' }, |
b03d27bd | 183 | #ifndef NO_SOCKETS_IN_FILE_SYSTEM |
254107e4 | 184 | { "socket-name", required_argument, NULL, 's' }, |
b03d27bd | 185 | #endif |
aa0b6932 | 186 | { "server-file", required_argument, NULL, 'f' }, |
0ebec7d3 | 187 | #ifndef WINDOWSNT |
30be2360 | 188 | { "display", required_argument, NULL, 'd' }, |
0ebec7d3 | 189 | #endif |
0191e222 | 190 | { "parent-id", required_argument, NULL, 'p' }, |
30be2360 | 191 | { 0, 0, 0, 0 } |
8f9aaa0a RS |
192 | }; |
193 | ||
974b73e8 KL |
194 | \f |
195 | /* Like malloc but get fatal error if memory is exhausted. */ | |
196 | ||
17107bb6 PE |
197 | static void * |
198 | xmalloc (size_t size) | |
974b73e8 | 199 | { |
17107bb6 | 200 | void *result = malloc (size); |
974b73e8 KL |
201 | if (result == NULL) |
202 | { | |
203 | perror ("malloc"); | |
204 | exit (EXIT_FAILURE); | |
205 | } | |
206 | return result; | |
207 | } | |
208 | ||
974b73e8 KL |
209 | /* From sysdep.c */ |
210 | #if !defined (HAVE_GET_CURRENT_DIR_NAME) || defined (BROKEN_GET_CURRENT_DIR_NAME) | |
211 | ||
cb06b8dc SM |
212 | /* From lisp.h */ |
213 | #ifndef DIRECTORY_SEP | |
214 | #define DIRECTORY_SEP '/' | |
215 | #endif | |
216 | #ifndef IS_DIRECTORY_SEP | |
217 | #define IS_DIRECTORY_SEP(_c_) ((_c_) == DIRECTORY_SEP) | |
218 | #endif | |
219 | #ifndef IS_DEVICE_SEP | |
220 | #ifndef DEVICE_SEP | |
221 | #define IS_DEVICE_SEP(_c_) 0 | |
222 | #else | |
223 | #define IS_DEVICE_SEP(_c_) ((_c_) == DEVICE_SEP) | |
224 | #endif | |
225 | #endif | |
cb06b8dc | 226 | |
c5443aa5 | 227 | char *get_current_dir_name (void); |
cb06b8dc | 228 | |
974b73e8 | 229 | /* Return the current working directory. Returns NULL on errors. |
5ab73228 | 230 | Any other returned value must be freed with free. This is used |
974b73e8 KL |
231 | only when get_current_dir_name is not defined on the system. */ |
232 | char* | |
7c3320d8 | 233 | get_current_dir_name (void) |
974b73e8 KL |
234 | { |
235 | char *buf; | |
b9170155 | 236 | const char *pwd; |
974b73e8 KL |
237 | struct stat dotstat, pwdstat; |
238 | /* If PWD is accurate, use it instead of calling getwd. PWD is | |
239 | sometimes a nicer name, and using it may avoid a fatal error if a | |
240 | parent directory is searchable but not readable. */ | |
7ce8671d | 241 | if ((pwd = egetenv ("PWD")) != 0 |
974b73e8 KL |
242 | && (IS_DIRECTORY_SEP (*pwd) || (*pwd && IS_DEVICE_SEP (pwd[1]))) |
243 | && stat (pwd, &pwdstat) == 0 | |
244 | && stat (".", &dotstat) == 0 | |
245 | && dotstat.st_ino == pwdstat.st_ino | |
246 | && dotstat.st_dev == pwdstat.st_dev | |
247 | #ifdef MAXPATHLEN | |
248 | && strlen (pwd) < MAXPATHLEN | |
249 | #endif | |
250 | ) | |
251 | { | |
252 | buf = (char *) xmalloc (strlen (pwd) + 1); | |
974b73e8 KL |
253 | strcpy (buf, pwd); |
254 | } | |
255 | #ifdef HAVE_GETCWD | |
256 | else | |
257 | { | |
258 | size_t buf_size = 1024; | |
974b73e8 KL |
259 | for (;;) |
260 | { | |
17107bb6 PE |
261 | int tmp_errno; |
262 | buf = malloc (buf_size); | |
263 | if (! buf) | |
264 | break; | |
974b73e8 KL |
265 | if (getcwd (buf, buf_size) == buf) |
266 | break; | |
17107bb6 PE |
267 | tmp_errno = errno; |
268 | free (buf); | |
269 | if (tmp_errno != ERANGE) | |
974b73e8 | 270 | { |
974b73e8 KL |
271 | errno = tmp_errno; |
272 | return NULL; | |
273 | } | |
274 | buf_size *= 2; | |
17107bb6 PE |
275 | if (! buf_size) |
276 | { | |
277 | errno = ENOMEM; | |
278 | return NULL; | |
279 | } | |
974b73e8 KL |
280 | } |
281 | } | |
282 | #else | |
283 | else | |
284 | { | |
285 | /* We need MAXPATHLEN here. */ | |
286 | buf = (char *) xmalloc (MAXPATHLEN + 1); | |
974b73e8 KL |
287 | if (getwd (buf) == NULL) |
288 | { | |
289 | int tmp_errno = errno; | |
290 | free (buf); | |
291 | errno = tmp_errno; | |
292 | return NULL; | |
293 | } | |
294 | } | |
295 | #endif | |
296 | return buf; | |
297 | } | |
298 | #endif | |
299 | ||
42073bfb | 300 | #ifdef WINDOWSNT |
7ce8671d | 301 | |
a54af40e EZ |
302 | /* Like strdup but get a fatal error if memory is exhausted. */ |
303 | ||
304 | char * | |
305 | xstrdup (const char *s) | |
306 | { | |
307 | char *result = strdup (s); | |
308 | if (result == NULL) | |
309 | { | |
310 | perror ("strdup"); | |
311 | exit (EXIT_FAILURE); | |
312 | } | |
313 | return result; | |
314 | } | |
315 | ||
7ce8671d JB |
316 | #define REG_ROOT "SOFTWARE\\GNU\\Emacs" |
317 | ||
318 | /* Retrieve an environment variable from the Emacs subkeys of the registry. | |
319 | Return NULL if the variable was not found, or it was empty. | |
320 | This code is based on w32_get_resource (w32.c). */ | |
321 | char * | |
7c3320d8 | 322 | w32_get_resource (HKEY predefined, char *key, LPDWORD type) |
7ce8671d JB |
323 | { |
324 | HKEY hrootkey = NULL; | |
325 | char *result = NULL; | |
326 | DWORD cbData; | |
327 | ||
328 | if (RegOpenKeyEx (predefined, REG_ROOT, 0, KEY_READ, &hrootkey) == ERROR_SUCCESS) | |
329 | { | |
330 | if (RegQueryValueEx (hrootkey, key, NULL, NULL, NULL, &cbData) == ERROR_SUCCESS) | |
331 | { | |
332 | result = (char *) xmalloc (cbData); | |
333 | ||
bc558f3e JB |
334 | if ((RegQueryValueEx (hrootkey, key, NULL, type, result, &cbData) != ERROR_SUCCESS) |
335 | || (*result == 0)) | |
7ce8671d JB |
336 | { |
337 | free (result); | |
338 | result = NULL; | |
339 | } | |
340 | } | |
341 | ||
342 | RegCloseKey (hrootkey); | |
343 | } | |
344 | ||
345 | return result; | |
346 | } | |
347 | ||
348 | /* | |
349 | getenv wrapper for Windows | |
350 | ||
a54af40e EZ |
351 | Value is allocated on the heap, and can be free'd. |
352 | ||
353 | This is needed to duplicate Emacs's behavior, which is to look for | |
354 | environment variables in the registry if they don't appear in the | |
355 | environment. */ | |
7ce8671d | 356 | char * |
7c3320d8 | 357 | w32_getenv (char *envvar) |
7ce8671d JB |
358 | { |
359 | char *value; | |
360 | DWORD dwType; | |
361 | ||
657d08d3 | 362 | if ((value = getenv (envvar))) |
a54af40e EZ |
363 | /* Found in the environment. strdup it, because values returned |
364 | by getenv cannot be free'd. */ | |
365 | return xstrdup (value); | |
7ce8671d JB |
366 | |
367 | if (! (value = w32_get_resource (HKEY_CURRENT_USER, envvar, &dwType)) && | |
368 | ! (value = w32_get_resource (HKEY_LOCAL_MACHINE, envvar, &dwType))) | |
d41784ee EZ |
369 | { |
370 | /* "w32console" is what Emacs on Windows uses for tty-type under -nw. */ | |
371 | if (strcmp (envvar, "TERM") == 0) | |
a54af40e | 372 | return xstrdup ("w32console"); |
d41784ee EZ |
373 | /* Found neither in the environment nor in the registry. */ |
374 | return NULL; | |
375 | } | |
7ce8671d JB |
376 | |
377 | if (dwType == REG_SZ) | |
378 | /* Registry; no need to expand. */ | |
379 | return value; | |
380 | ||
381 | if (dwType == REG_EXPAND_SZ) | |
382 | { | |
383 | DWORD size; | |
384 | ||
657d08d3 | 385 | if ((size = ExpandEnvironmentStrings (value, NULL, 0))) |
7ce8671d JB |
386 | { |
387 | char *buffer = (char *) xmalloc (size); | |
388 | if (ExpandEnvironmentStrings (value, buffer, size)) | |
389 | { | |
390 | /* Found and expanded. */ | |
391 | free (value); | |
392 | return buffer; | |
393 | } | |
394 | ||
395 | /* Error expanding. */ | |
396 | free (buffer); | |
397 | } | |
398 | } | |
399 | ||
400 | /* Not the right type, or not correctly expanded. */ | |
401 | free (value); | |
402 | return NULL; | |
403 | } | |
404 | ||
ff90fbde | 405 | void |
7c3320d8 | 406 | w32_set_user_model_id (void) |
ff90fbde JR |
407 | { |
408 | HMODULE shell; | |
0a3472c7 | 409 | HRESULT (WINAPI * set_user_model) (wchar_t * id); |
ff90fbde JR |
410 | |
411 | /* On Windows 7 and later, we need to set the user model ID | |
412 | to associate emacsclient launched files with Emacs frames | |
413 | in the UI. */ | |
361358ea | 414 | shell = LoadLibrary ("shell32.dll"); |
ff90fbde JR |
415 | if (shell) |
416 | { | |
417 | set_user_model | |
418 | = (void *) GetProcAddress (shell, | |
419 | "SetCurrentProcessExplicitAppUserModelID"); | |
420 | /* If the function is defined, then we are running on Windows 7 | |
421 | or newer, and the UI uses this to group related windows | |
422 | together. Since emacs, runemacs, emacsclient are related, we | |
423 | want them grouped even though the executables are different, | |
424 | so we need to set a consistent ID between them. */ | |
425 | if (set_user_model) | |
426 | set_user_model (L"GNU.Emacs"); | |
427 | ||
428 | FreeLibrary (shell); | |
429 | } | |
430 | } | |
431 | ||
42073bfb | 432 | int |
7c3320d8 | 433 | w32_window_app (void) |
42073bfb JB |
434 | { |
435 | static int window_app = -1; | |
436 | char szTitle[MAX_PATH]; | |
437 | ||
438 | if (window_app < 0) | |
dbf60b07 JR |
439 | { |
440 | /* Checking for STDOUT does not work; it's a valid handle also in | |
441 | nonconsole apps. Testing for the console title seems to work. */ | |
442 | window_app = (GetConsoleTitleA (szTitle, MAX_PATH) == 0); | |
443 | if (window_app) | |
361358ea | 444 | InitCommonControls (); |
dbf60b07 | 445 | } |
42073bfb JB |
446 | |
447 | return window_app; | |
448 | } | |
105faa84 DN |
449 | |
450 | /* | |
cb06b8dc | 451 | execvp wrapper for Windows. Quotes arguments with embedded spaces. |
105faa84 DN |
452 | |
453 | This is necessary due to the broken implementation of exec* routines in | |
454 | the Microsoft libraries: they concatenate the arguments together without | |
455 | quoting special characters, and pass the result to CreateProcess, with | |
7c3320d8 | 456 | predictably bad results. By contrast, POSIX execvp passes the arguments |
105faa84 DN |
457 | directly into the argv array of the child process. |
458 | */ | |
459 | int | |
7c3320d8 | 460 | w32_execvp (const char *path, char **argv) |
105faa84 DN |
461 | { |
462 | int i; | |
463 | ||
464 | /* Required to allow a .BAT script as alternate editor. */ | |
465 | argv[0] = (char *) alternate_editor; | |
466 | ||
467 | for (i = 0; argv[i]; i++) | |
468 | if (strchr (argv[i], ' ')) | |
469 | { | |
470 | char *quoted = alloca (strlen (argv[i]) + 3); | |
471 | sprintf (quoted, "\"%s\"", argv[i]); | |
472 | argv[i] = quoted; | |
473 | } | |
474 | ||
475 | return execvp (path, argv); | |
476 | } | |
477 | ||
478 | #undef execvp | |
479 | #define execvp w32_execvp | |
480 | ||
d41784ee EZ |
481 | /* Emulation of ttyname for Windows. */ |
482 | char * | |
483 | ttyname (int fd) | |
484 | { | |
485 | return "CONOUT$"; | |
486 | } | |
487 | ||
105faa84 | 488 | #endif /* WINDOWSNT */ |
42073bfb | 489 | |
f387c1ee JB |
490 | /* Display a normal or error message. |
491 | On Windows, use a message box if compiled as a Windows app. */ | |
72b04a8a | 492 | static void message (int, const char *, ...) ATTRIBUTE_FORMAT_PRINTF (2, 3); |
b23b5a5b | 493 | static void |
b0bbc07d | 494 | message (int is_error, const char *format, ...) |
42073bfb | 495 | { |
42073bfb JB |
496 | va_list args; |
497 | ||
b0bbc07d | 498 | va_start (args, format); |
42073bfb JB |
499 | |
500 | #ifdef WINDOWSNT | |
501 | if (w32_window_app ()) | |
502 | { | |
17107bb6 PE |
503 | char msg[2048]; |
504 | vsnprintf (msg, sizeof msg, format, args); | |
505 | msg[sizeof msg - 1] = '\0'; | |
506 | ||
42073bfb JB |
507 | if (is_error) |
508 | MessageBox (NULL, msg, "Emacsclient ERROR", MB_ICONERROR); | |
509 | else | |
510 | MessageBox (NULL, msg, "Emacsclient", MB_ICONINFORMATION); | |
511 | } | |
512 | else | |
513 | #endif | |
9219db75 JB |
514 | { |
515 | FILE *f = is_error ? stderr : stdout; | |
516 | ||
17107bb6 | 517 | vfprintf (f, format, args); |
9219db75 JB |
518 | fflush (f); |
519 | } | |
17107bb6 PE |
520 | |
521 | va_end (args); | |
42073bfb JB |
522 | } |
523 | ||
8f9aaa0a | 524 | /* Decode the options from argv and argc. |
5212210c | 525 | The global variable `optind' will say how many arguments we used up. */ |
8f9aaa0a | 526 | |
b23b5a5b | 527 | static void |
873fbd0b | 528 | decode_options (int argc, char **argv) |
8f9aaa0a | 529 | { |
7ce8671d | 530 | alternate_editor = egetenv ("ALTERNATE_EDITOR"); |
0ea5797a | 531 | |
8f9aaa0a RS |
532 | while (1) |
533 | { | |
dc1cd5f7 | 534 | int opt = getopt_long_only (argc, argv, |
b03d27bd | 535 | #ifndef NO_SOCKETS_IN_FILE_SYSTEM |
3794a2d3 | 536 | "VHneqa:s:f:d:F:tc", |
b03d27bd | 537 | #else |
3794a2d3 | 538 | "VHneqa:f:d:F:tc", |
b03d27bd | 539 | #endif |
974b73e8 | 540 | longopts, 0); |
8f9aaa0a RS |
541 | |
542 | if (opt == EOF) | |
543 | break; | |
544 | ||
545 | switch (opt) | |
546 | { | |
547 | case 0: | |
548 | /* If getopt returns 0, then it has already processed a | |
549 | long-named option. We should do nothing. */ | |
550 | break; | |
e69233c2 | 551 | |
97e3214d GM |
552 | case 'a': |
553 | alternate_editor = optarg; | |
554 | break; | |
e69233c2 | 555 | |
b03d27bd | 556 | #ifndef NO_SOCKETS_IN_FILE_SYSTEM |
254107e4 RS |
557 | case 's': |
558 | socket_name = optarg; | |
559 | break; | |
b03d27bd | 560 | #endif |
254107e4 | 561 | |
aa0b6932 JB |
562 | case 'f': |
563 | server_file = optarg; | |
564 | break; | |
254107e4 | 565 | |
0ea5797a SM |
566 | /* We used to disallow this argument in w32, but it seems better |
567 | to allow it, for the occasional case where the user is | |
568 | connecting with a w32 client to a server compiled with X11 | |
569 | support. */ | |
30be2360 SM |
570 | case 'd': |
571 | display = optarg; | |
572 | break; | |
573 | ||
8f9aaa0a RS |
574 | case 'n': |
575 | nowait = 1; | |
576 | break; | |
577 | ||
30be2360 SM |
578 | case 'e': |
579 | eval = 1; | |
580 | break; | |
581 | ||
0b973fc5 DW |
582 | case 'q': |
583 | quiet = 1; | |
584 | break; | |
585 | ||
8f9aaa0a | 586 | case 'V': |
42073bfb | 587 | message (FALSE, "emacsclient %s\n", VERSION); |
65396510 | 588 | exit (EXIT_SUCCESS); |
8f9aaa0a | 589 | break; |
46cec291 | 590 | |
819b8f00 | 591 | case 't': |
77134727 | 592 | tty = 1; |
c1b8e896 | 593 | current_frame = 0; |
77134727 KL |
594 | break; |
595 | ||
e5299d8d | 596 | case 'c': |
31fa6595 | 597 | current_frame = 0; |
9628b887 | 598 | break; |
0b0d3e0b | 599 | |
0191e222 CY |
600 | case 'p': |
601 | parent_id = optarg; | |
602 | current_frame = 0; | |
603 | break; | |
604 | ||
8f9aaa0a | 605 | case 'H': |
8f9aaa0a | 606 | print_help_and_exit (); |
20c396e8 JB |
607 | break; |
608 | ||
18a4ce5e AR |
609 | case 'F': |
610 | frame_parameters = optarg; | |
611 | break; | |
612 | ||
20c396e8 | 613 | default: |
42073bfb | 614 | message (TRUE, "Try `%s --help' for more information\n", progname); |
65396510 | 615 | exit (EXIT_FAILURE); |
20c396e8 | 616 | break; |
8f9aaa0a RS |
617 | } |
618 | } | |
9628b887 | 619 | |
273b9028 CY |
620 | /* If the -c option is used (without -t) and no --display argument |
621 | is provided, try $DISPLAY. | |
622 | Without the -c option, we used to set `display' to $DISPLAY by | |
623 | default, but this changed the default behavior and is sometimes | |
624 | inconvenient. So we force users to use "--display $DISPLAY" if | |
625 | they want Emacs to connect to their current display. */ | |
09317bf4 | 626 | if (!current_frame && !tty && !display) |
e7534fc4 AR |
627 | { |
628 | display = egetenv ("DISPLAY"); | |
629 | #ifdef NS_IMPL_COCOA | |
630 | /* Under Cocoa, we don't really use displays the same way as in X, | |
631 | so provide a dummy. */ | |
632 | if (!display || strlen (display) == 0) | |
633 | display = "ns"; | |
634 | #endif | |
635 | } | |
9997dc15 | 636 | |
273b9028 | 637 | /* A null-string display is invalid. */ |
0ea5797a SM |
638 | if (display && strlen (display) == 0) |
639 | display = NULL; | |
640 | ||
520fca41 JB |
641 | #ifdef WINDOWSNT |
642 | /* Emacs on Windows does not support GUI and console frames in the same | |
643 | instance. So, it makes sense to treat the -t and -c options as | |
644 | equivalent, and open a new frame regardless of whether the running | |
645 | instance is GUI or console. Ideally, we would only set tty = 1 when | |
646 | the instance is running in a console, but alas we don't know that. | |
647 | The simplest workaround is to always ask for a tty frame, and let | |
648 | server.el check whether it makes sense. */ | |
649 | if (tty || !current_frame) | |
650 | { | |
651 | display = (const char *) ttyname; | |
652 | current_frame = 0; | |
653 | tty = 1; | |
654 | } | |
655 | #endif | |
656 | ||
273b9028 CY |
657 | /* If no display is available, new frames are tty frames. */ |
658 | if (!current_frame && !display) | |
92071250 | 659 | tty = 1; |
c0f342ab | 660 | |
b8ccaf6f | 661 | /* --no-wait implies --current-frame on ttys when there are file |
273b9028 | 662 | arguments or expressions given. */ |
b8ccaf6f | 663 | if (nowait && tty && argc - optind > 0) |
92071250 | 664 | current_frame = 1; |
802bdb3c DN |
665 | |
666 | #ifdef WINDOWSNT | |
69157c99 | 667 | if (alternate_editor && alternate_editor[0] == '\0') |
802bdb3c DN |
668 | { |
669 | message (TRUE, "--alternate-editor argument or ALTERNATE_EDITOR variable cannot be\n\ | |
670 | an empty string"); | |
671 | exit (EXIT_FAILURE); | |
672 | } | |
673 | #endif /* WINDOWSNT */ | |
8f9aaa0a RS |
674 | } |
675 | ||
974b73e8 | 676 | \f |
b23b5a5b | 677 | static void |
873fbd0b | 678 | print_help_and_exit (void) |
8f9aaa0a | 679 | { |
c0f342ab JB |
680 | /* Spaces and tabs are significant in this message; they're chosen so the |
681 | message aligns properly both in a tty and in a Windows message box. | |
682 | Please try to preserve them; otherwise the output is very hard to read | |
683 | when using emacsclientw. */ | |
42073bfb | 684 | message (FALSE, |
974b73e8 | 685 | "Usage: %s [OPTIONS] FILE...\n\ |
30be2360 SM |
686 | Tell the Emacs server to visit the specified files.\n\ |
687 | Every FILE can be either just a FILENAME or [+LINE[:COLUMN]] FILENAME.\n\ | |
20c396e8 | 688 | \n\ |
30be2360 | 689 | The following OPTIONS are accepted:\n\ |
c0f342ab JB |
690 | -V, --version Just print version info and return\n\ |
691 | -H, --help Print this usage information message\n\ | |
dc1cd5f7 | 692 | -nw, -t, --tty Open a new Emacs frame on the current terminal\n\ |
c4b858e3 | 693 | -c, --create-frame Create a new frame instead of trying to\n\ |
9dfda22f | 694 | use the current Emacs frame\n\ |
a150502a | 695 | -F ALIST, --frame-parameters=ALIST\n\ |
5f9388d0 | 696 | Set the parameters of a new frame\n\ |
c0f342ab | 697 | -e, --eval Evaluate the FILE arguments as ELisp expressions\n\ |
d07529f3 | 698 | -n, --no-wait Don't wait for the server to return\n\ |
0b973fc5 | 699 | -q, --quiet Don't display messages on success\n\ |
24d5010d | 700 | -d DISPLAY, --display=DISPLAY\n\ |
0191e222 CY |
701 | Visit the file in the given display\n\ |
702 | --parent-id=ID Open in parent window ID, via XEmbed\n" | |
aa0b6932 | 703 | #ifndef NO_SOCKETS_IN_FILE_SYSTEM |
24d5010d | 704 | "-s SOCKET, --socket-name=SOCKET\n\ |
9dfda22f | 705 | Set filename of the UNIX socket for communication\n" |
aa0b6932 | 706 | #endif |
24d5010d | 707 | "-f SERVER, --server-file=SERVER\n\ |
9dfda22f | 708 | Set filename of the TCP authentication file\n\ |
24d5010d | 709 | -a EDITOR, --alternate-editor=EDITOR\n\ |
9dfda22f | 710 | Editor to fallback to if the server is not running\n" |
6133a1a9 | 711 | #ifndef WINDOWSNT |
c3f995a2 JB |
712 | " If EDITOR is the empty string, start Emacs in daemon\n\ |
713 | mode and try connecting again\n" | |
6133a1a9 | 714 | #endif /* not WINDOWSNT */ |
c3f995a2 | 715 | "\n\ |
5f54cae6 | 716 | Report bugs with M-x report-emacs-bug.\n", progname); |
65396510 | 717 | exit (EXIT_SUCCESS); |
8f9aaa0a | 718 | } |
5212210c | 719 | |
aa0b6932 JB |
720 | /* |
721 | Try to run a different command, or --if no alternate editor is | |
722 | defined-- exit with an errorcode. | |
cb06b8dc | 723 | Uses argv, but gets it from the global variable main_argv. |
aa0b6932 | 724 | */ |
b23b5a5b | 725 | static void |
974b73e8 | 726 | fail (void) |
9002956f | 727 | { |
aa0b6932 | 728 | if (alternate_editor) |
9002956f | 729 | { |
aa0b6932 | 730 | int i = optind - 1; |
4472aef4 | 731 | |
974b73e8 | 732 | execvp (alternate_editor, main_argv + i); |
42073bfb | 733 | message (TRUE, "%s: error executing alternate editor \"%s\"\n", |
974b73e8 | 734 | progname, alternate_editor); |
9002956f | 735 | } |
aa0b6932 | 736 | exit (EXIT_FAILURE); |
9002956f KL |
737 | } |
738 | ||
aa0b6932 | 739 | \f |
1e7823d0 | 740 | #if !defined (HAVE_SOCKETS) || !defined (HAVE_INET_SOCKETS) |
9002956f | 741 | |
aa0b6932 | 742 | int |
0613f5d5 | 743 | main (int argc, char **argv) |
9002956f | 744 | { |
974b73e8 KL |
745 | main_argv = argv; |
746 | progname = argv[0]; | |
747 | message (TRUE, "%s: Sorry, the Emacs server is supported only\n" | |
c0f342ab | 748 | "on systems with Berkeley sockets.\n", |
aa0b6932 | 749 | argv[0]); |
974b73e8 | 750 | fail (); |
9002956f KL |
751 | } |
752 | ||
1e7823d0 | 753 | #else /* HAVE_SOCKETS && HAVE_INET_SOCKETS */ |
2828d5f9 | 754 | |
aa0b6932 JB |
755 | #define AUTH_KEY_LENGTH 64 |
756 | #define SEND_BUFFER_SIZE 4096 | |
757 | ||
873fbd0b | 758 | extern char *strerror (int); |
aa0b6932 JB |
759 | |
760 | /* Buffer to accumulate data to send in TCP connections. */ | |
761 | char send_buffer[SEND_BUFFER_SIZE + 1]; | |
762 | int sblen = 0; /* Fill pointer for the send buffer. */ | |
4b7b77f6 JR |
763 | /* Socket used to communicate with the Emacs server process. */ |
764 | HSOCKET emacs_socket = 0; | |
aa0b6932 | 765 | |
d22b00e5 JR |
766 | /* On Windows, the socket library was historically separate from the standard |
767 | C library, so errors are handled differently. */ | |
b23b5a5b | 768 | static void |
988e88ab | 769 | sock_err_message (const char *function_name) |
d22b00e5 JR |
770 | { |
771 | #ifdef WINDOWSNT | |
772 | char* msg = NULL; | |
773 | ||
774 | FormatMessage (FORMAT_MESSAGE_FROM_SYSTEM | |
775 | | FORMAT_MESSAGE_ALLOCATE_BUFFER | |
776 | | FORMAT_MESSAGE_ARGUMENT_ARRAY, | |
777 | NULL, WSAGetLastError (), 0, (LPTSTR)&msg, 0, NULL); | |
778 | ||
779 | message (TRUE, "%s: %s: %s\n", progname, function_name, msg); | |
780 | ||
781 | LocalFree (msg); | |
782 | #else | |
783 | message (TRUE, "%s: %s: %s\n", progname, function_name, strerror (errno)); | |
784 | #endif | |
785 | } | |
786 | ||
787 | ||
aa0b6932 JB |
788 | /* Let's send the data to Emacs when either |
789 | - the data ends in "\n", or | |
790 | - the buffer is full (but this shouldn't happen) | |
791 | Otherwise, we just accumulate it. */ | |
b23b5a5b | 792 | static void |
988e88ab | 793 | send_to_emacs (HSOCKET s, const char *data) |
aa0b6932 JB |
794 | { |
795 | while (data) | |
2828d5f9 | 796 | { |
728a982d | 797 | size_t dlen = strlen (data); |
aa0b6932 JB |
798 | if (dlen + sblen >= SEND_BUFFER_SIZE) |
799 | { | |
800 | int part = SEND_BUFFER_SIZE - sblen; | |
801 | strncpy (&send_buffer[sblen], data, part); | |
802 | data += part; | |
803 | sblen = SEND_BUFFER_SIZE; | |
804 | } | |
805 | else if (dlen) | |
806 | { | |
807 | strcpy (&send_buffer[sblen], data); | |
808 | data = NULL; | |
809 | sblen += dlen; | |
810 | } | |
811 | else | |
812 | break; | |
813 | ||
814 | if (sblen == SEND_BUFFER_SIZE | |
815 | || (sblen > 0 && send_buffer[sblen-1] == '\n')) | |
816 | { | |
817 | int sent = send (s, send_buffer, sblen, 0); | |
818 | if (sent != sblen) | |
819 | strcpy (send_buffer, &send_buffer[sent]); | |
820 | sblen -= sent; | |
821 | } | |
2828d5f9 | 822 | } |
2828d5f9 | 823 | } |
2828d5f9 KL |
824 | |
825 | \f | |
0b0d3e0b | 826 | /* In STR, insert a & before each &, each space, each newline, and |
a4cf2096 | 827 | any initial -. Change spaces to underscores, too, so that the |
0b0d3e0b KL |
828 | return value never contains a space. |
829 | ||
3a35a84c | 830 | Does not change the string. Outputs the result to S. */ |
b23b5a5b | 831 | static void |
988e88ab | 832 | quote_argument (HSOCKET s, const char *str) |
5212210c | 833 | { |
9002956f | 834 | char *copy = (char *) xmalloc (strlen (str) * 2 + 1); |
988e88ab J |
835 | const char *p; |
836 | char *q; | |
5212210c | 837 | |
0b0d3e0b | 838 | p = str; |
5212210c RS |
839 | q = copy; |
840 | while (*p) | |
841 | { | |
842 | if (*p == ' ') | |
843 | { | |
f1db6a73 | 844 | *q++ = '&'; |
5212210c RS |
845 | *q++ = '_'; |
846 | p++; | |
847 | } | |
3cf8c6aa SM |
848 | else if (*p == '\n') |
849 | { | |
850 | *q++ = '&'; | |
851 | *q++ = 'n'; | |
852 | p++; | |
853 | } | |
5212210c RS |
854 | else |
855 | { | |
0b0d3e0b | 856 | if (*p == '&' || (*p == '-' && p == str)) |
f1db6a73 | 857 | *q++ = '&'; |
5212210c RS |
858 | *q++ = *p++; |
859 | } | |
860 | } | |
f1db6a73 | 861 | *q++ = 0; |
5212210c | 862 | |
486ba65f | 863 | send_to_emacs (s, copy); |
87209357 EZ |
864 | |
865 | free (copy); | |
5212210c | 866 | } |
0c76956f | 867 | |
0b0d3e0b KL |
868 | |
869 | /* The inverse of quote_argument. Removes quoting in string STR by | |
870 | modifying the string in place. Returns STR. */ | |
871 | ||
b23b5a5b | 872 | static char * |
873fbd0b | 873 | unquote_argument (char *str) |
0b0d3e0b KL |
874 | { |
875 | char *p, *q; | |
876 | ||
877 | if (! str) | |
878 | return str; | |
879 | ||
880 | p = str; | |
881 | q = str; | |
882 | while (*p) | |
883 | { | |
884 | if (*p == '&') | |
885 | { | |
886 | p++; | |
887 | if (*p == '&') | |
888 | *p = '&'; | |
889 | else if (*p == '_') | |
890 | *p = ' '; | |
891 | else if (*p == 'n') | |
892 | *p = '\n'; | |
893 | else if (*p == '-') | |
894 | *p = '-'; | |
895 | } | |
896 | *q++ = *p++; | |
897 | } | |
898 | *q = 0; | |
899 | return str; | |
900 | } | |
901 | ||
8f9aaa0a | 902 | \f |
b23b5a5b | 903 | static int |
03fc768b | 904 | file_name_absolute_p (const char *filename) |
b03d27bd JB |
905 | { |
906 | /* Sanity check, it shouldn't happen. */ | |
907 | if (! filename) return FALSE; | |
908 | ||
909 | /* /xxx is always an absolute path. */ | |
910 | if (filename[0] == '/') return TRUE; | |
911 | ||
912 | /* Empty filenames (which shouldn't happen) are relative. */ | |
913 | if (filename[0] == '\0') return FALSE; | |
914 | ||
915 | #ifdef WINDOWSNT | |
71b8f735 | 916 | /* X:\xxx is always absolute. */ |
03fc768b | 917 | if (isalpha ((unsigned char) filename[0]) |
cb0297bb | 918 | && filename[1] == ':' && (filename[2] == '\\' || filename[2] == '/')) |
b03d27bd JB |
919 | return TRUE; |
920 | ||
921 | /* Both \xxx and \\xxx\yyy are absolute. */ | |
922 | if (filename[0] == '\\') return TRUE; | |
923 | #endif | |
924 | ||
925 | return FALSE; | |
926 | } | |
927 | ||
aa0b6932 | 928 | #ifdef WINDOWSNT |
f0384499 | 929 | /* Wrapper to make WSACleanup a cdecl, as required by atexit. */ |
7c3320d8 JB |
930 | void __cdecl |
931 | close_winsock (void) | |
aa0b6932 JB |
932 | { |
933 | WSACleanup (); | |
934 | } | |
0c76956f | 935 | |
b03d27bd JB |
936 | /* Initialize the WinSock2 library. */ |
937 | void | |
7c3320d8 | 938 | initialize_sockets (void) |
0c76956f | 939 | { |
aa0b6932 JB |
940 | WSADATA wsaData; |
941 | ||
aa0b6932 JB |
942 | if (WSAStartup (MAKEWORD (2, 0), &wsaData)) |
943 | { | |
78da39c6 | 944 | message (TRUE, "%s: error initializing WinSock2\n", progname); |
aa0b6932 JB |
945 | exit (EXIT_FAILURE); |
946 | } | |
947 | ||
948 | atexit (close_winsock); | |
0c76956f | 949 | } |
e35fc962 | 950 | #endif /* WINDOWSNT */ |
974b73e8 | 951 | |
8f9aaa0a | 952 | \f |
97e3214d | 953 | /* |
aa0b6932 | 954 | * Read the information needed to set up a TCP comm channel with |
968ef9b4 | 955 | * the Emacs server: host, port, and authentication string. |
0e0dced5 | 956 | */ |
b23b5a5b | 957 | static int |
873fbd0b | 958 | get_server_config (struct sockaddr_in *server, char *authentication) |
97e3214d | 959 | { |
aa0b6932 JB |
960 | char dotted[32]; |
961 | char *port; | |
b03d27bd | 962 | FILE *config = NULL; |
aa0b6932 | 963 | |
b03d27bd JB |
964 | if (file_name_absolute_p (server_file)) |
965 | config = fopen (server_file, "rb"); | |
966 | else | |
97e3214d | 967 | { |
b9170155 | 968 | const char *home = egetenv ("HOME"); |
88b46d84 | 969 | |
aa0b6932 JB |
970 | if (home) |
971 | { | |
17107bb6 PE |
972 | char *path = xmalloc (strlen (home) + strlen (server_file) |
973 | + EXTRA_SPACE); | |
974 | strcpy (path, home); | |
975 | strcat (path, "/.emacs.d/server/"); | |
976 | strcat (path, server_file); | |
aa0b6932 | 977 | config = fopen (path, "rb"); |
17107bb6 | 978 | free (path); |
aa0b6932 | 979 | } |
88b46d84 | 980 | #ifdef WINDOWSNT |
7ce8671d | 981 | if (!config && (home = egetenv ("APPDATA"))) |
88b46d84 | 982 | { |
17107bb6 PE |
983 | char *path = xmalloc (strlen (home) + strlen (server_file) |
984 | + EXTRA_SPACE); | |
985 | strcpy (path, home); | |
986 | strcat (path, "/.emacs.d/server/"); | |
987 | strcat (path, server_file); | |
88b46d84 | 988 | config = fopen (path, "rb"); |
17107bb6 | 989 | free (path); |
88b46d84 JB |
990 | } |
991 | #endif | |
aa0b6932 JB |
992 | } |
993 | ||
994 | if (! config) | |
995 | return FALSE; | |
996 | ||
997 | if (fgets (dotted, sizeof dotted, config) | |
968ef9b4 JB |
998 | && (port = strchr (dotted, ':'))) |
999 | *port++ = '\0'; | |
97e3214d GM |
1000 | else |
1001 | { | |
78da39c6 | 1002 | message (TRUE, "%s: invalid configuration info\n", progname); |
65396510 | 1003 | exit (EXIT_FAILURE); |
97e3214d | 1004 | } |
97e3214d | 1005 | |
aa0b6932 JB |
1006 | server->sin_family = AF_INET; |
1007 | server->sin_addr.s_addr = inet_addr (dotted); | |
1008 | server->sin_port = htons (atoi (port)); | |
97e3214d | 1009 | |
aa0b6932 JB |
1010 | if (! fread (authentication, AUTH_KEY_LENGTH, 1, config)) |
1011 | { | |
78da39c6 | 1012 | message (TRUE, "%s: cannot read authentication info\n", progname); |
aa0b6932 JB |
1013 | exit (EXIT_FAILURE); |
1014 | } | |
46cec291 | 1015 | |
aa0b6932 | 1016 | fclose (config); |
97e3214d | 1017 | |
aa0b6932 | 1018 | return TRUE; |
97e3214d GM |
1019 | } |
1020 | ||
b23b5a5b | 1021 | static HSOCKET |
873fbd0b | 1022 | set_tcp_socket (void) |
aa0b6932 JB |
1023 | { |
1024 | HSOCKET s; | |
1025 | struct sockaddr_in server; | |
aa0b6932 JB |
1026 | struct linger l_arg = {1, 1}; |
1027 | char auth_string[AUTH_KEY_LENGTH + 1]; | |
9628b887 | 1028 | |
aa0b6932 JB |
1029 | if (! get_server_config (&server, auth_string)) |
1030 | return INVALID_SOCKET; | |
1031 | ||
0b973fc5 | 1032 | if (server.sin_addr.s_addr != inet_addr ("127.0.0.1") && !quiet) |
9219db75 | 1033 | message (FALSE, "%s: connected to remote socket at %s\n", |
b03d27bd JB |
1034 | progname, inet_ntoa (server.sin_addr)); |
1035 | ||
aa0b6932 JB |
1036 | /* |
1037 | * Open up an AF_INET socket | |
1038 | */ | |
1039 | if ((s = socket (AF_INET, SOCK_STREAM, IPPROTO_TCP)) < 0) | |
1040 | { | |
d22b00e5 | 1041 | sock_err_message ("socket"); |
aa0b6932 JB |
1042 | return INVALID_SOCKET; |
1043 | } | |
1044 | ||
1045 | /* | |
1046 | * Set up the socket | |
1047 | */ | |
1048 | if (connect (s, (struct sockaddr *) &server, sizeof server) < 0) | |
1049 | { | |
d22b00e5 | 1050 | sock_err_message ("connect"); |
aa0b6932 JB |
1051 | return INVALID_SOCKET; |
1052 | } | |
1053 | ||
aa0b6932 JB |
1054 | setsockopt (s, SOL_SOCKET, SO_LINGER, (char *) &l_arg, sizeof l_arg); |
1055 | ||
1056 | /* | |
1057 | * Send the authentication | |
1058 | */ | |
1059 | auth_string[AUTH_KEY_LENGTH] = '\0'; | |
1060 | ||
486ba65f JR |
1061 | send_to_emacs (s, "-auth "); |
1062 | send_to_emacs (s, auth_string); | |
5ab73228 | 1063 | send_to_emacs (s, " "); |
aa0b6932 JB |
1064 | |
1065 | return s; | |
1066 | } | |
1067 | ||
b2ff54a0 JR |
1068 | |
1069 | /* Returns 1 if PREFIX is a prefix of STRING. */ | |
1070 | static int | |
988e88ab | 1071 | strprefix (const char *prefix, const char *string) |
b2ff54a0 | 1072 | { |
cb06b8dc | 1073 | return !strncmp (prefix, string, strlen (prefix)); |
b2ff54a0 JR |
1074 | } |
1075 | ||
a336ee5b CY |
1076 | /* Get tty name and type. If successful, return the type in TTY_TYPE |
1077 | and the name in TTY_NAME, and return 1. Otherwise, fail if NOABORT | |
1078 | is zero, or return 0 if NOABORT is non-zero. */ | |
1079 | ||
b23b5a5b | 1080 | static int |
b9170155 | 1081 | find_tty (const char **tty_type, const char **tty_name, int noabort) |
a336ee5b | 1082 | { |
b9170155 PE |
1083 | const char *type = egetenv ("TERM"); |
1084 | const char *name = ttyname (fileno (stdout)); | |
a336ee5b CY |
1085 | |
1086 | if (!name) | |
1087 | { | |
1088 | if (noabort) | |
1089 | return 0; | |
1090 | else | |
1091 | { | |
1092 | message (TRUE, "%s: could not get terminal name\n", progname); | |
1093 | fail (); | |
1094 | } | |
1095 | } | |
1096 | ||
1097 | if (!type) | |
1098 | { | |
1099 | if (noabort) | |
1100 | return 0; | |
1101 | else | |
1102 | { | |
1103 | message (TRUE, "%s: please set the TERM variable to your terminal type\n", | |
1104 | progname); | |
1105 | fail (); | |
1106 | } | |
1107 | } | |
1108 | ||
1109 | if (strcmp (type, "eterm") == 0) | |
1110 | { | |
1111 | if (noabort) | |
1112 | return 0; | |
1113 | else | |
1114 | { | |
1115 | /* This causes nasty, MULTI_KBOARD-related input lockouts. */ | |
1116 | message (TRUE, "%s: opening a frame in an Emacs term buffer" | |
1117 | " is not supported\n", progname); | |
1118 | fail (); | |
1119 | } | |
1120 | } | |
1121 | ||
1122 | *tty_name = name; | |
1123 | *tty_type = type; | |
1124 | return 1; | |
1125 | } | |
1126 | ||
b2ff54a0 | 1127 | |
aa0b6932 | 1128 | #if !defined (NO_SOCKETS_IN_FILE_SYSTEM) |
46cec291 | 1129 | |
9f637eea GM |
1130 | /* Three possibilities: |
1131 | 2 - can't be `stat'ed (sets errno) | |
1132 | 1 - isn't owned by us | |
1133 | 0 - success: none of the above */ | |
1134 | ||
1135 | static int | |
fe91f5a0 | 1136 | socket_status (const char *name) |
9f637eea GM |
1137 | { |
1138 | struct stat statbfr; | |
1139 | ||
b0bbc07d | 1140 | if (stat (name, &statbfr) == -1) |
9f637eea GM |
1141 | return 2; |
1142 | ||
1143 | if (statbfr.st_uid != geteuid ()) | |
1144 | return 1; | |
0b0d3e0b | 1145 | |
9f637eea GM |
1146 | return 0; |
1147 | } | |
1148 | ||
974b73e8 | 1149 | \f |
da8e1115 KL |
1150 | /* A signal handler that passes the signal to the Emacs process. |
1151 | Useful for SIGWINCH. */ | |
1152 | ||
9af30bdf | 1153 | static void |
428a555e | 1154 | pass_signal_to_emacs (int signalnum) |
9628b887 KL |
1155 | { |
1156 | int old_errno = errno; | |
1157 | ||
9f729af5 | 1158 | if (emacs_pid) |
428a555e | 1159 | kill (emacs_pid, signalnum); |
9f729af5 | 1160 | |
428a555e | 1161 | signal (signalnum, pass_signal_to_emacs); |
9f729af5 KL |
1162 | errno = old_errno; |
1163 | } | |
1164 | ||
0b0d3e0b KL |
1165 | /* Signal handler for SIGCONT; notify the Emacs process that it can |
1166 | now resume our tty frame. */ | |
1167 | ||
9af30bdf | 1168 | static void |
0b0d3e0b KL |
1169 | handle_sigcont (int signalnum) |
1170 | { | |
1171 | int old_errno = errno; | |
1172 | ||
1173 | if (tcgetpgrp (1) == getpgrp ()) | |
1174 | { | |
1175 | /* We are in the foreground. */ | |
486ba65f | 1176 | send_to_emacs (emacs_socket, "-resume \n"); |
0b0d3e0b KL |
1177 | } |
1178 | else | |
1179 | { | |
1180 | /* We are in the background; cancel the continue. */ | |
1181 | kill (getpid (), SIGSTOP); | |
1182 | } | |
c6c53c3e KL |
1183 | |
1184 | signal (signalnum, handle_sigcont); | |
0b0d3e0b KL |
1185 | errno = old_errno; |
1186 | } | |
1187 | ||
1188 | /* Signal handler for SIGTSTP; notify the Emacs process that we are | |
1189 | going to sleep. Normally the suspend is initiated by Emacs via | |
1190 | server-handle-suspend-tty, but if the server gets out of sync with | |
1191 | reality, we may get a SIGTSTP on C-z. Handling this signal and | |
1192 | notifying Emacs about it should get things under control again. */ | |
1193 | ||
9af30bdf | 1194 | static void |
0b0d3e0b KL |
1195 | handle_sigtstp (int signalnum) |
1196 | { | |
1197 | int old_errno = errno; | |
1198 | sigset_t set; | |
c0f342ab | 1199 | |
90843190 | 1200 | if (emacs_socket) |
486ba65f | 1201 | send_to_emacs (emacs_socket, "-suspend \n"); |
0b0d3e0b | 1202 | |
5ab73228 | 1203 | /* Unblock this signal and call the default handler by temporarily |
8350f087 | 1204 | changing the handler and resignaling. */ |
0b0d3e0b KL |
1205 | sigprocmask (SIG_BLOCK, NULL, &set); |
1206 | sigdelset (&set, signalnum); | |
1207 | signal (signalnum, SIG_DFL); | |
1208 | kill (getpid (), signalnum); | |
1209 | sigprocmask (SIG_SETMASK, &set, NULL); /* Let's the above signal through. */ | |
1210 | signal (signalnum, handle_sigtstp); | |
1211 | ||
1212 | errno = old_errno; | |
1213 | } | |
273b9028 CY |
1214 | |
1215 | ||
da8e1115 | 1216 | /* Set up signal handlers before opening a frame on the current tty. */ |
0b0d3e0b | 1217 | |
b23b5a5b | 1218 | static void |
4d553a13 | 1219 | init_signals (void) |
9628b887 KL |
1220 | { |
1221 | /* Set up signal handlers. */ | |
428a555e | 1222 | signal (SIGWINCH, pass_signal_to_emacs); |
4ca927b4 KL |
1223 | |
1224 | /* Don't pass SIGINT and SIGQUIT to Emacs, because it has no way of | |
1225 | deciding which terminal the signal came from. C-g is now a | |
1226 | normal input event on secondary terminals. */ | |
1227 | #if 0 | |
428a555e KL |
1228 | signal (SIGINT, pass_signal_to_emacs); |
1229 | signal (SIGQUIT, pass_signal_to_emacs); | |
4ca927b4 | 1230 | #endif |
0b0d3e0b KL |
1231 | |
1232 | signal (SIGCONT, handle_sigcont); | |
1233 | signal (SIGTSTP, handle_sigtstp); | |
1234 | signal (SIGTTOU, handle_sigtstp); | |
9628b887 KL |
1235 | } |
1236 | ||
46cec291 | 1237 | |
b23b5a5b | 1238 | static HSOCKET |
873fbd0b | 1239 | set_local_socket (void) |
46cec291 | 1240 | { |
aa0b6932 | 1241 | HSOCKET s; |
46cec291 | 1242 | struct sockaddr_un server; |
46cec291 | 1243 | |
e69233c2 | 1244 | /* |
46cec291 RS |
1245 | * Open up an AF_UNIX socket in this person's home directory |
1246 | */ | |
1247 | ||
1248 | if ((s = socket (AF_UNIX, SOCK_STREAM, 0)) < 0) | |
1249 | { | |
42073bfb | 1250 | message (TRUE, "%s: socket: %s\n", progname, strerror (errno)); |
aa0b6932 | 1251 | return INVALID_SOCKET; |
46cec291 | 1252 | } |
e69233c2 | 1253 | |
46cec291 | 1254 | server.sun_family = AF_UNIX; |
c5fee545 | 1255 | |
c5fee545 | 1256 | { |
9f637eea | 1257 | int sock_status = 0; |
5c9659d3 | 1258 | int default_sock = !socket_name; |
b80bf66e | 1259 | int saved_errno = 0; |
988e88ab | 1260 | const char *server_name = "server"; |
4be3dfc5 | 1261 | const char *tmpdir IF_LINT ( = NULL); |
17107bb6 PE |
1262 | char *tmpdir_storage = NULL; |
1263 | char *socket_name_storage = NULL; | |
0b0d3e0b | 1264 | |
8966b757 AS |
1265 | if (socket_name && !strchr (socket_name, '/') |
1266 | && !strchr (socket_name, '\\')) | |
1267 | { | |
1268 | /* socket_name is a file name component. */ | |
d3a6748c KL |
1269 | server_name = socket_name; |
1270 | socket_name = NULL; | |
1271 | default_sock = 1; /* Try both UIDs. */ | |
0734b0d0 | 1272 | } |
efb859b4 | 1273 | |
5c9659d3 | 1274 | if (default_sock) |
254107e4 | 1275 | { |
17107bb6 PE |
1276 | long uid = geteuid (); |
1277 | ptrdiff_t tmpdirlen; | |
f77b11a0 JB |
1278 | tmpdir = egetenv ("TMPDIR"); |
1279 | if (!tmpdir) | |
b336bfcd GM |
1280 | { |
1281 | #ifdef DARWIN_OS | |
e6068ab3 YM |
1282 | #ifndef _CS_DARWIN_USER_TEMP_DIR |
1283 | #define _CS_DARWIN_USER_TEMP_DIR 65537 | |
1284 | #endif | |
b336bfcd GM |
1285 | size_t n = confstr (_CS_DARWIN_USER_TEMP_DIR, NULL, (size_t) 0); |
1286 | if (n > 0) | |
1287 | { | |
17107bb6 | 1288 | tmpdir = tmpdir_storage = xmalloc (n); |
b336bfcd GM |
1289 | confstr (_CS_DARWIN_USER_TEMP_DIR, tmpdir, n); |
1290 | } | |
1291 | else | |
1292 | #endif | |
1293 | tmpdir = "/tmp"; | |
1294 | } | |
17107bb6 PE |
1295 | tmpdirlen = strlen (tmpdir); |
1296 | socket_name = socket_name_storage = | |
1297 | xmalloc (tmpdirlen + strlen (server_name) + EXTRA_SPACE); | |
1298 | strcpy (socket_name, tmpdir); | |
1299 | sprintf (socket_name + tmpdirlen, "/emacs%ld/", uid); | |
1300 | strcat (socket_name + tmpdirlen, server_name); | |
254107e4 RS |
1301 | } |
1302 | ||
1303 | if (strlen (socket_name) < sizeof (server.sun_path)) | |
1304 | strcpy (server.sun_path, socket_name); | |
1305 | else | |
819b8f00 | 1306 | { |
78da39c6 | 1307 | message (TRUE, "%s: socket-name %s too long\n", |
974b73e8 | 1308 | progname, socket_name); |
819b8f00 KL |
1309 | fail (); |
1310 | } | |
efb859b4 | 1311 | |
9f637eea GM |
1312 | /* See if the socket exists, and if it's owned by us. */ |
1313 | sock_status = socket_status (server.sun_path); | |
152b6e83 | 1314 | saved_errno = errno; |
5c9659d3 | 1315 | if (sock_status && default_sock) |
efb859b4 | 1316 | { |
9f637eea GM |
1317 | /* Failing that, see if LOGNAME or USER exist and differ from |
1318 | our euid. If so, look for a socket based on the UID | |
1319 | associated with the name. This is reminiscent of the logic | |
1320 | that init_editfns uses to set the global Vuser_full_name. */ | |
e69233c2 | 1321 | |
b9170155 | 1322 | const char *user_name = egetenv ("LOGNAME"); |
293f9f2a | 1323 | |
9f637eea | 1324 | if (!user_name) |
b9170155 | 1325 | user_name = egetenv ("USER"); |
e69233c2 | 1326 | |
9f637eea GM |
1327 | if (user_name) |
1328 | { | |
1329 | struct passwd *pw = getpwnam (user_name); | |
293f9f2a | 1330 | |
9f637eea GM |
1331 | if (pw && (pw->pw_uid != geteuid ())) |
1332 | { | |
1333 | /* We're running under su, apparently. */ | |
17107bb6 PE |
1334 | long uid = pw->pw_uid; |
1335 | ptrdiff_t tmpdirlen = strlen (tmpdir); | |
1336 | socket_name = xmalloc (tmpdirlen + strlen (server_name) | |
1337 | + EXTRA_SPACE); | |
1338 | strcpy (socket_name, tmpdir); | |
1339 | sprintf (socket_name + tmpdirlen, "/emacs%ld/", uid); | |
1340 | strcat (socket_name + tmpdirlen, server_name); | |
5c9659d3 SM |
1341 | |
1342 | if (strlen (socket_name) < sizeof (server.sun_path)) | |
1343 | strcpy (server.sun_path, socket_name); | |
1344 | else | |
1345 | { | |
78da39c6 | 1346 | message (TRUE, "%s: socket-name %s too long\n", |
aa0b6932 | 1347 | progname, socket_name); |
65396510 | 1348 | exit (EXIT_FAILURE); |
5c9659d3 | 1349 | } |
17107bb6 | 1350 | free (socket_name); |
5c9659d3 | 1351 | |
9f637eea | 1352 | sock_status = socket_status (server.sun_path); |
b80bf66e | 1353 | saved_errno = errno; |
9f637eea | 1354 | } |
293f9f2a RS |
1355 | else |
1356 | errno = saved_errno; | |
9f637eea | 1357 | } |
efb859b4 | 1358 | } |
e69233c2 | 1359 | |
17107bb6 PE |
1360 | free (socket_name_storage); |
1361 | free (tmpdir_storage); | |
1362 | ||
aa0b6932 JB |
1363 | switch (sock_status) |
1364 | { | |
1365 | case 1: | |
974b73e8 KL |
1366 | /* There's a socket, but it isn't owned by us. This is OK if |
1367 | we are root. */ | |
1368 | if (0 != geteuid ()) | |
1369 | { | |
1370 | message (TRUE, "%s: Invalid socket owner\n", progname); | |
aa0b6932 | 1371 | return INVALID_SOCKET; |
974b73e8 KL |
1372 | } |
1373 | break; | |
aa0b6932 JB |
1374 | |
1375 | case 2: | |
974b73e8 KL |
1376 | /* `stat' failed */ |
1377 | if (saved_errno == ENOENT) | |
1378 | message (TRUE, | |
1379 | "%s: can't find socket; have you started the server?\n\ | |
45adde32 | 1380 | To start the server in Emacs, type \"M-x server-start\".\n", |
aa0b6932 | 1381 | progname); |
974b73e8 KL |
1382 | else |
1383 | message (TRUE, "%s: can't stat %s: %s\n", | |
aa0b6932 | 1384 | progname, server.sun_path, strerror (saved_errno)); |
974b73e8 | 1385 | return INVALID_SOCKET; |
aa0b6932 | 1386 | } |
efb859b4 | 1387 | } |
46cec291 | 1388 | |
4e23f2ba JB |
1389 | if (connect (s, (struct sockaddr *) &server, strlen (server.sun_path) + 2) |
1390 | < 0) | |
46cec291 | 1391 | { |
42073bfb | 1392 | message (TRUE, "%s: connect: %s\n", progname, strerror (errno)); |
aa0b6932 | 1393 | return INVALID_SOCKET; |
46cec291 | 1394 | } |
23a7488d | 1395 | |
aa0b6932 JB |
1396 | return s; |
1397 | } | |
1398 | #endif /* ! NO_SOCKETS_IN_FILE_SYSTEM */ | |
1399 | ||
b23b5a5b | 1400 | static HSOCKET |
636b507b | 1401 | set_socket (int no_exit_if_error) |
aa0b6932 | 1402 | { |
b03d27bd | 1403 | HSOCKET s; |
c0f342ab | 1404 | |
b03d27bd | 1405 | INITIALIZE (); |
c0f342ab | 1406 | |
aa0b6932 | 1407 | #ifndef NO_SOCKETS_IN_FILE_SYSTEM |
b03d27bd JB |
1408 | /* Explicit --socket-name argument. */ |
1409 | if (socket_name) | |
46cec291 | 1410 | { |
b03d27bd | 1411 | s = set_local_socket (); |
636b507b | 1412 | if ((s != INVALID_SOCKET) || no_exit_if_error) |
974b73e8 | 1413 | return s; |
355a326e | 1414 | message (TRUE, "%s: error accessing socket \"%s\"\n", |
974b73e8 | 1415 | progname, socket_name); |
b03d27bd | 1416 | exit (EXIT_FAILURE); |
46cec291 | 1417 | } |
b03d27bd JB |
1418 | #endif |
1419 | ||
1420 | /* Explicit --server-file arg or EMACS_SERVER_FILE variable. */ | |
1421 | if (!server_file) | |
7ce8671d | 1422 | server_file = egetenv ("EMACS_SERVER_FILE"); |
46cec291 | 1423 | |
b03d27bd | 1424 | if (server_file) |
23a7488d | 1425 | { |
b03d27bd | 1426 | s = set_tcp_socket (); |
636b507b | 1427 | if ((s != INVALID_SOCKET) || no_exit_if_error) |
974b73e8 | 1428 | return s; |
c0f342ab | 1429 | |
78da39c6 | 1430 | message (TRUE, "%s: error accessing server file \"%s\"\n", |
974b73e8 | 1431 | progname, server_file); |
b03d27bd | 1432 | exit (EXIT_FAILURE); |
23a7488d | 1433 | } |
c0f342ab | 1434 | |
b03d27bd JB |
1435 | #ifndef NO_SOCKETS_IN_FILE_SYSTEM |
1436 | /* Implicit local socket. */ | |
1437 | s = set_local_socket (); | |
1438 | if (s != INVALID_SOCKET) | |
1439 | return s; | |
1440 | #endif | |
23a7488d | 1441 | |
b03d27bd JB |
1442 | /* Implicit server file. */ |
1443 | server_file = "server"; | |
1444 | s = set_tcp_socket (); | |
636b507b | 1445 | if ((s != INVALID_SOCKET) || no_exit_if_error) |
b03d27bd JB |
1446 | return s; |
1447 | ||
1448 | /* No implicit or explicit socket, and no alternate editor. */ | |
42073bfb | 1449 | message (TRUE, "%s: No socket or alternate editor. Please use:\n\n" |
b03d27bd JB |
1450 | #ifndef NO_SOCKETS_IN_FILE_SYSTEM |
1451 | "\t--socket-name\n" | |
ee6a193c | 1452 | #endif |
b03d27bd JB |
1453 | "\t--server-file (or environment variable EMACS_SERVER_FILE)\n\ |
1454 | \t--alternate-editor (or environment variable ALTERNATE_EDITOR)\n", | |
1455 | progname); | |
1456 | exit (EXIT_FAILURE); | |
aa0b6932 | 1457 | } |
46cec291 | 1458 | |
0e0dced5 JB |
1459 | #ifdef WINDOWSNT |
1460 | FARPROC set_fg; /* Pointer to AllowSetForegroundWindow. */ | |
1461 | FARPROC get_wc; /* Pointer to RealGetWindowClassA. */ | |
1462 | ||
1463 | BOOL CALLBACK | |
7c3320d8 | 1464 | w32_find_emacs_process (HWND hWnd, LPARAM lParam) |
0e0dced5 JB |
1465 | { |
1466 | DWORD pid; | |
1467 | char class[6]; | |
1468 | ||
1469 | /* Reject any window not of class "Emacs". */ | |
1470 | if (! get_wc (hWnd, class, sizeof (class)) | |
1471 | || strcmp (class, "Emacs")) | |
1472 | return TRUE; | |
1473 | ||
1474 | /* We only need the process id, not the thread id. */ | |
1475 | (void) GetWindowThreadProcessId (hWnd, &pid); | |
1476 | ||
1477 | /* Not the one we're looking for. */ | |
1478 | if (pid != (DWORD) emacs_pid) return TRUE; | |
1479 | ||
1480 | /* OK, let's raise it. */ | |
1481 | set_fg (emacs_pid); | |
1482 | ||
1483 | /* Stop enumeration. */ | |
1484 | return FALSE; | |
1485 | } | |
1486 | ||
1487 | /* | |
1488 | * Search for a window of class "Emacs" and owned by a process with | |
1489 | * process id = emacs_pid. If found, allow it to grab the focus. | |
1490 | */ | |
1491 | void | |
7c3320d8 | 1492 | w32_give_focus (void) |
0e0dced5 | 1493 | { |
ff90fbde | 1494 | HANDLE user32; |
0e0dced5 | 1495 | |
71b8f735 | 1496 | /* It shouldn't happen when dealing with TCP sockets. */ |
0e0dced5 JB |
1497 | if (!emacs_pid) return; |
1498 | ||
ff90fbde JR |
1499 | user32 = GetModuleHandle ("user32.dll"); |
1500 | ||
1501 | if (!user32) | |
1502 | return; | |
0e0dced5 JB |
1503 | |
1504 | /* Modern Windows restrict which processes can set the foreground window. | |
1505 | emacsclient can allow Emacs to grab the focus by calling the function | |
1506 | AllowSetForegroundWindow. Unfortunately, older Windows (W95, W98 and | |
1507 | NT) lack this function, so we have to check its availability. */ | |
ff90fbde JR |
1508 | if ((set_fg = GetProcAddress (user32, "AllowSetForegroundWindow")) |
1509 | && (get_wc = GetProcAddress (user32, "RealGetWindowClassA"))) | |
0e0dced5 | 1510 | EnumWindows (w32_find_emacs_process, (LPARAM) 0); |
0e0dced5 JB |
1511 | } |
1512 | #endif | |
1513 | ||
636b507b DN |
1514 | /* Start the emacs daemon and try to connect to it. */ |
1515 | ||
b23b5a5b | 1516 | static void |
636b507b DN |
1517 | start_daemon_and_retry_set_socket (void) |
1518 | { | |
802bdb3c | 1519 | #ifndef WINDOWSNT |
636b507b DN |
1520 | pid_t dpid; |
1521 | int status; | |
636b507b DN |
1522 | |
1523 | dpid = fork (); | |
1524 | ||
1525 | if (dpid > 0) | |
1526 | { | |
fd95644b DN |
1527 | pid_t w; |
1528 | w = waitpid (dpid, &status, WUNTRACED | WCONTINUED); | |
636b507b | 1529 | |
361358ea | 1530 | if ((w == -1) || !WIFEXITED (status) || WEXITSTATUS (status)) |
fd95644b DN |
1531 | { |
1532 | message (TRUE, "Error: Could not start the Emacs daemon\n"); | |
1533 | exit (EXIT_FAILURE); | |
1534 | } | |
1535 | ||
1536 | /* Try connecting, the daemon should have started by now. */ | |
1537 | message (TRUE, "Emacs daemon should have started, trying to connect again\n"); | |
636b507b | 1538 | if ((emacs_socket = set_socket (1)) == INVALID_SOCKET) |
fd95644b DN |
1539 | { |
1540 | message (TRUE, "Error: Cannot connect even after starting the Emacs daemon\n"); | |
1541 | exit (EXIT_FAILURE); | |
1542 | } | |
636b507b DN |
1543 | } |
1544 | else if (dpid < 0) | |
1545 | { | |
fd95644b | 1546 | fprintf (stderr, "Error: Cannot fork!\n"); |
6ab88e02 | 1547 | exit (EXIT_FAILURE); |
636b507b DN |
1548 | } |
1549 | else | |
1550 | { | |
988e88ab | 1551 | char emacs[] = "emacs"; |
b0bbc07d PE |
1552 | char daemon_option[] = "--daemon"; |
1553 | char *d_argv[] = {emacs, daemon_option, 0 }; | |
636b507b DN |
1554 | if (socket_name != NULL) |
1555 | { | |
1556 | /* Pass --daemon=socket_name as argument. */ | |
988e88ab | 1557 | const char *deq = "--daemon="; |
17107bb6 PE |
1558 | char *daemon_arg = xmalloc (strlen (deq) |
1559 | + strlen (socket_name) + 1); | |
636b507b DN |
1560 | strcpy (daemon_arg, deq); |
1561 | strcat (daemon_arg, socket_name); | |
1562 | d_argv[1] = daemon_arg; | |
1563 | } | |
1564 | execvp ("emacs", d_argv); | |
1565 | message (TRUE, "%s: error starting emacs daemon\n", progname); | |
1566 | } | |
802bdb3c | 1567 | #endif /* WINDOWSNT */ |
636b507b DN |
1568 | } |
1569 | ||
aa0b6932 | 1570 | int |
873fbd0b | 1571 | main (int argc, char **argv) |
aa0b6932 | 1572 | { |
c5443aa5 | 1573 | int rl = 0, needlf = 0; |
974b73e8 | 1574 | char *cwd, *str; |
aa0b6932 | 1575 | char string[BUFSIZ+1]; |
4be3dfc5 PE |
1576 | int null_socket_name IF_LINT ( = 0); |
1577 | int null_server_file IF_LINT ( = 0); | |
1578 | int start_daemon_if_needed; | |
3ecb8d93 | 1579 | int exit_status = EXIT_SUCCESS; |
aa0b6932 | 1580 | |
974b73e8 | 1581 | main_argv = argv; |
aa0b6932 JB |
1582 | progname = argv[0]; |
1583 | ||
ff90fbde JR |
1584 | #ifdef WINDOWSNT |
1585 | /* On Windows 7 and later, we need to explicitly associate emacsclient | |
1586 | with emacs so the UI behaves sensibly. */ | |
1587 | w32_set_user_model_id (); | |
1588 | #endif | |
1589 | ||
aa0b6932 JB |
1590 | /* Process options. */ |
1591 | decode_options (argc, argv); | |
1592 | ||
273b9028 | 1593 | if ((argc - optind < 1) && !eval && current_frame) |
23a7488d | 1594 | { |
974b73e8 KL |
1595 | message (TRUE, "%s: file name or argument required\n" |
1596 | "Try `%s --help' for more information\n", | |
1597 | progname, progname); | |
aa0b6932 | 1598 | exit (EXIT_FAILURE); |
23a7488d RS |
1599 | } |
1600 | ||
636b507b DN |
1601 | /* If alternate_editor is the empty string, start the emacs daemon |
1602 | in case of failure to connect. */ | |
1603 | start_daemon_if_needed = (alternate_editor | |
1604 | && (alternate_editor[0] == '\0')); | |
1605 | if (start_daemon_if_needed) | |
1606 | { | |
1607 | /* set_socket changes the values for socket_name and | |
1608 | server_file, we need to reset them, if they were NULL before | |
1609 | for the second call to set_socket. */ | |
1610 | null_socket_name = (socket_name == NULL); | |
1611 | null_server_file = (server_file == NULL); | |
1612 | } | |
aa0b6932 | 1613 | |
7e6bb4c9 PE |
1614 | emacs_socket = set_socket (alternate_editor || start_daemon_if_needed); |
1615 | if (emacs_socket == INVALID_SOCKET) | |
1616 | { | |
1617 | if (! start_daemon_if_needed) | |
1618 | fail (); | |
1619 | ||
1620 | /* Reset socket_name and server_file if they were NULL | |
1621 | before the set_socket call. */ | |
1622 | if (null_socket_name) | |
1623 | socket_name = NULL; | |
1624 | if (null_server_file) | |
1625 | server_file = NULL; | |
1626 | ||
1627 | start_daemon_and_retry_set_socket (); | |
1628 | } | |
974b73e8 KL |
1629 | |
1630 | cwd = get_current_dir_name (); | |
46cec291 RS |
1631 | if (cwd == 0) |
1632 | { | |
1633 | /* getwd puts message in STRING if it fails. */ | |
974b73e8 KL |
1634 | message (TRUE, "%s: %s\n", progname, |
1635 | "Cannot get current working directory"); | |
819b8f00 | 1636 | fail (); |
46cec291 RS |
1637 | } |
1638 | ||
c66648e0 | 1639 | #ifdef WINDOWSNT |
0e0dced5 | 1640 | w32_give_focus (); |
c66648e0 JB |
1641 | #endif |
1642 | ||
273b9028 | 1643 | /* Send over our environment and current directory. */ |
59e085e0 KL |
1644 | if (!current_frame) |
1645 | { | |
e7308292 CY |
1646 | #ifndef WINDOWSNT |
1647 | /* This is defined in stdlib.h on MS-Windows. It's defined in | |
7ebc1f13 | 1648 | unistd.h on some POSIX hosts, but not all (Bug#10155). */ |
e7308292 CY |
1649 | extern char **environ; |
1650 | #endif | |
59e085e0 KL |
1651 | int i; |
1652 | for (i = 0; environ[i]; i++) | |
1653 | { | |
486ba65f JR |
1654 | send_to_emacs (emacs_socket, "-env "); |
1655 | quote_argument (emacs_socket, environ[i]); | |
1656 | send_to_emacs (emacs_socket, " "); | |
59e085e0 | 1657 | } |
2828d5f9 | 1658 | } |
ba528748 SM |
1659 | send_to_emacs (emacs_socket, "-dir "); |
1660 | quote_argument (emacs_socket, cwd); | |
1661 | send_to_emacs (emacs_socket, "/"); | |
1662 | send_to_emacs (emacs_socket, " "); | |
2828d5f9 | 1663 | |
6afdd335 | 1664 | retry: |
5212210c | 1665 | if (nowait) |
486ba65f | 1666 | send_to_emacs (emacs_socket, "-nowait "); |
292d74a3 | 1667 | |
92071250 | 1668 | if (current_frame) |
486ba65f | 1669 | send_to_emacs (emacs_socket, "-current-frame "); |
c0f342ab | 1670 | |
30be2360 | 1671 | if (display) |
87209357 | 1672 | { |
486ba65f JR |
1673 | send_to_emacs (emacs_socket, "-display "); |
1674 | quote_argument (emacs_socket, display); | |
1675 | send_to_emacs (emacs_socket, " "); | |
87209357 | 1676 | } |
30be2360 | 1677 | |
0191e222 CY |
1678 | if (parent_id) |
1679 | { | |
1680 | send_to_emacs (emacs_socket, "-parent-id "); | |
1681 | quote_argument (emacs_socket, parent_id); | |
1682 | send_to_emacs (emacs_socket, " "); | |
1683 | } | |
1684 | ||
18a4ce5e AR |
1685 | if (frame_parameters && !current_frame) |
1686 | { | |
1687 | send_to_emacs (emacs_socket, "-frame-parameters "); | |
1688 | quote_argument (emacs_socket, frame_parameters); | |
1689 | send_to_emacs (emacs_socket, " "); | |
1690 | } | |
1691 | ||
8536c0f5 CY |
1692 | /* If using the current frame, send tty information to Emacs anyway. |
1693 | In daemon mode, Emacs may need to occupy this tty if no other | |
1694 | frame is available. */ | |
322ca650 | 1695 | if (tty || (current_frame && !eval)) |
9628b887 | 1696 | { |
b9170155 | 1697 | const char *tty_type, *tty_name; |
0b0d3e0b | 1698 | |
273b9028 CY |
1699 | if (find_tty (&tty_type, &tty_name, !tty)) |
1700 | { | |
b2ff54a0 | 1701 | #if !defined (NO_SOCKETS_IN_FILE_SYSTEM) |
273b9028 | 1702 | init_signals (); |
b2ff54a0 | 1703 | #endif |
273b9028 CY |
1704 | send_to_emacs (emacs_socket, "-tty "); |
1705 | quote_argument (emacs_socket, tty_name); | |
1706 | send_to_emacs (emacs_socket, " "); | |
1707 | quote_argument (emacs_socket, tty_type); | |
1708 | send_to_emacs (emacs_socket, " "); | |
1709 | } | |
9628b887 | 1710 | } |
77134727 | 1711 | |
273b9028 | 1712 | if (!current_frame && !tty) |
486ba65f | 1713 | send_to_emacs (emacs_socket, "-window-system "); |
0b0d3e0b | 1714 | |
87209357 | 1715 | if ((argc - optind > 0)) |
5212210c | 1716 | { |
b0bbc07d | 1717 | int i; |
87209357 | 1718 | for (i = optind; i < argc; i++) |
46cec291 | 1719 | { |
0b0d3e0b | 1720 | |
87209357 | 1721 | if (eval) |
0b0d3e0b | 1722 | { |
974b73e8 | 1723 | /* Don't prepend cwd or anything like that. */ |
486ba65f JR |
1724 | send_to_emacs (emacs_socket, "-eval "); |
1725 | quote_argument (emacs_socket, argv[i]); | |
1726 | send_to_emacs (emacs_socket, " "); | |
0b0d3e0b KL |
1727 | continue; |
1728 | } | |
1729 | ||
1730 | if (*argv[i] == '+') | |
1731 | { | |
87209357 EZ |
1732 | char *p = argv[i] + 1; |
1733 | while (isdigit ((unsigned char) *p) || *p == ':') p++; | |
0b0d3e0b KL |
1734 | if (*p == 0) |
1735 | { | |
486ba65f JR |
1736 | send_to_emacs (emacs_socket, "-position "); |
1737 | quote_argument (emacs_socket, argv[i]); | |
1738 | send_to_emacs (emacs_socket, " "); | |
0b0d3e0b KL |
1739 | continue; |
1740 | } | |
0b0d3e0b | 1741 | } |
6cde1b21 JB |
1742 | #ifdef WINDOWSNT |
1743 | else if (! file_name_absolute_p (argv[i]) | |
1744 | && (isalpha (argv[i][0]) && argv[i][1] == ':')) | |
1745 | /* Windows can have a different default directory for each | |
1746 | drive, so the cwd passed via "-dir" is not sufficient | |
1747 | to account for that. | |
1748 | If the user uses <drive>:<relpath>, we hence need to be | |
1749 | careful to expand <relpath> with the default directory | |
1750 | corresponding to <drive>. */ | |
1751 | { | |
1752 | char *filename = (char *) xmalloc (MAX_PATH); | |
1753 | DWORD size; | |
1754 | ||
1755 | size = GetFullPathName (argv[i], MAX_PATH, filename, NULL); | |
1756 | if (size > 0 && size < MAX_PATH) | |
1757 | argv[i] = filename; | |
1758 | else | |
1759 | free (filename); | |
1760 | } | |
1761 | #endif | |
0b0d3e0b | 1762 | |
486ba65f | 1763 | send_to_emacs (emacs_socket, "-file "); |
486ba65f JR |
1764 | quote_argument (emacs_socket, argv[i]); |
1765 | send_to_emacs (emacs_socket, " "); | |
0b0d3e0b | 1766 | } |
46cec291 | 1767 | } |
273b9028 | 1768 | else if (eval) |
87209357 | 1769 | { |
273b9028 CY |
1770 | /* Read expressions interactively. */ |
1771 | while ((str = fgets (string, BUFSIZ, stdin))) | |
1772 | { | |
1773 | send_to_emacs (emacs_socket, "-eval "); | |
1774 | quote_argument (emacs_socket, str); | |
1775 | } | |
1776 | send_to_emacs (emacs_socket, " "); | |
87209357 | 1777 | } |
0b0d3e0b | 1778 | |
486ba65f | 1779 | send_to_emacs (emacs_socket, "\n"); |
46cec291 | 1780 | |
fc2040c0 | 1781 | /* Wait for an answer. */ |
0b973fc5 | 1782 | if (!eval && !tty && !nowait && !quiet) |
30be2360 SM |
1783 | { |
1784 | printf ("Waiting for Emacs..."); | |
1785 | needlf = 2; | |
1786 | } | |
46cec291 | 1787 | fflush (stdout); |
0b0d3e0b | 1788 | fsync (1); |
46cec291 | 1789 | |
3cf8c6aa | 1790 | /* Now, wait for an answer and print any messages. */ |
b166dcd8 | 1791 | while (exit_status == EXIT_SUCCESS) |
3cf8c6aa | 1792 | { |
974b73e8 | 1793 | char *p; |
b166dcd8 KC |
1794 | do |
1795 | { | |
1796 | errno = 0; | |
1797 | rl = recv (emacs_socket, string, BUFSIZ, 0); | |
1798 | } | |
1799 | /* If we receive a signal (e.g. SIGWINCH, which we pass | |
1800 | through to Emacs), on some OSes we get EINTR and must retry. */ | |
1801 | while (rl < 0 && errno == EINTR); | |
1802 | ||
1803 | if (rl <= 0) | |
1804 | break; | |
b23b5a5b | 1805 | |
974b73e8 KL |
1806 | string[rl] = '\0'; |
1807 | ||
1808 | p = string + strlen (string) - 1; | |
1809 | while (p > string && *p == '\n') | |
0b0d3e0b KL |
1810 | *p-- = 0; |
1811 | ||
31fa6595 | 1812 | if (strprefix ("-emacs-pid ", string)) |
4d553a13 | 1813 | { |
6afdd335 | 1814 | /* -emacs-pid PID: The process id of the Emacs process. */ |
77134727 KL |
1815 | emacs_pid = strtol (string + strlen ("-emacs-pid"), NULL, 10); |
1816 | } | |
974b73e8 | 1817 | else if (strprefix ("-window-system-unsupported ", string)) |
6afdd335 KL |
1818 | { |
1819 | /* -window-system-unsupported: Emacs was compiled without X | |
1820 | support. Try again on the terminal. */ | |
6afdd335 KL |
1821 | nowait = 0; |
1822 | tty = 1; | |
1823 | goto retry; | |
1824 | } | |
974b73e8 | 1825 | else if (strprefix ("-print ", string)) |
77134727 | 1826 | { |
6afdd335 | 1827 | /* -print STRING: Print STRING on the terminal. */ |
974b73e8 | 1828 | str = unquote_argument (string + strlen ("-print ")); |
0b0d3e0b | 1829 | if (needlf) |
77134727 | 1830 | printf ("\n"); |
0b0d3e0b KL |
1831 | printf ("%s", str); |
1832 | needlf = str[0] == '\0' ? needlf : str[strlen (str) - 1] != '\n'; | |
77134727 | 1833 | } |
974b73e8 | 1834 | else if (strprefix ("-error ", string)) |
77134727 | 1835 | { |
6afdd335 | 1836 | /* -error DESCRIPTION: Signal an error on the terminal. */ |
974b73e8 | 1837 | str = unquote_argument (string + strlen ("-error ")); |
0b0d3e0b KL |
1838 | if (needlf) |
1839 | printf ("\n"); | |
974b73e8 | 1840 | fprintf (stderr, "*ERROR*: %s", str); |
0b0d3e0b | 1841 | needlf = str[0] == '\0' ? needlf : str[strlen (str) - 1] != '\n'; |
3ecb8d93 | 1842 | exit_status = EXIT_FAILURE; |
0b0d3e0b | 1843 | } |
c801ad51 | 1844 | #ifdef SIGSTOP |
382707ec | 1845 | else if (strprefix ("-suspend ", string)) |
0b0d3e0b | 1846 | { |
6afdd335 | 1847 | /* -suspend: Suspend this terminal, i.e., stop the process. */ |
0b0d3e0b | 1848 | if (needlf) |
77134727 | 1849 | printf ("\n"); |
0b0d3e0b KL |
1850 | needlf = 0; |
1851 | kill (0, SIGSTOP); | |
4d553a13 | 1852 | } |
b2ff54a0 | 1853 | #endif |
4d553a13 KL |
1854 | else |
1855 | { | |
6afdd335 | 1856 | /* Unknown command. */ |
0b0d3e0b | 1857 | if (needlf) |
4d553a13 | 1858 | printf ("\n"); |
974b73e8 | 1859 | printf ("*ERROR*: Unknown message: %s", string); |
3ecb8d93 WS |
1860 | needlf = string[0] |
1861 | == '\0' ? needlf : string[strlen (string) - 1] != '\n'; | |
4d553a13 | 1862 | } |
3cf8c6aa SM |
1863 | } |
1864 | ||
1865 | if (needlf) | |
1866 | printf ("\n"); | |
1867 | fflush (stdout); | |
0b0d3e0b | 1868 | fsync (1); |
23a7488d | 1869 | |
3ecb8d93 WS |
1870 | if (rl < 0) |
1871 | exit_status = EXIT_FAILURE; | |
1872 | ||
4b7b77f6 | 1873 | CLOSE_SOCKET (emacs_socket); |
3ecb8d93 | 1874 | return exit_status; |
46cec291 RS |
1875 | } |
1876 | ||
1e7823d0 | 1877 | #endif /* HAVE_SOCKETS && HAVE_INET_SOCKETS */ |
aa0b6932 | 1878 | |
27711600 RM |
1879 | \f |
1880 | #ifndef HAVE_STRERROR | |
1881 | char * | |
1882 | strerror (errnum) | |
1883 | int errnum; | |
1884 | { | |
1885 | extern char *sys_errlist[]; | |
1886 | extern int sys_nerr; | |
1887 | ||
1888 | if (errnum >= 0 && errnum < sys_nerr) | |
1889 | return sys_errlist[errnum]; | |
1890 | return (char *) "Unknown error"; | |
1891 | } | |
1892 | ||
1893 | #endif /* ! HAVE_STRERROR */ | |
ab5796a9 | 1894 | |
65396510 TTN |
1895 | |
1896 | /* emacsclient.c ends here */ |