Commit | Line | Data |
---|---|---|
efb859b4 | 1 | /* Client process that communicates with GNU Emacs acting as server. |
9374581a | 2 | |
ba318903 | 3 | Copyright (C) 1986-1987, 1994, 1999-2014 Free Software Foundation, Inc. |
46cec291 RS |
4 | |
5 | This file is part of GNU Emacs. | |
6 | ||
294981c7 | 7 | GNU Emacs is free software: you can redistribute it and/or modify |
46cec291 | 8 | it under the terms of the GNU General Public License as published by |
294981c7 GM |
9 | the Free Software Foundation, either version 3 of the License, or |
10 | (at your option) any later version. | |
46cec291 RS |
11 | |
12 | GNU Emacs is distributed in the hope that it will be useful, | |
13 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
15 | GNU General Public License for more details. | |
16 | ||
17 | You should have received a copy of the GNU General Public License | |
294981c7 | 18 | along with GNU Emacs. If not, see <http://www.gnu.org/licenses/>. */ |
46cec291 RS |
19 | |
20 | ||
2f8fe2f4 | 21 | #include <config.h> |
e69233c2 | 22 | |
aa0b6932 | 23 | #ifdef WINDOWSNT |
aa0b6932 | 24 | |
79432772 | 25 | /* ms-w32.h defines these, which disables sockets altogether! */ |
bc28de71 JB |
26 | # undef _WINSOCKAPI_ |
27 | # undef _WINSOCK_H | |
28 | ||
411b80a5 JB |
29 | # include <malloc.h> |
30 | # include <stdlib.h> | |
42073bfb | 31 | # include <windows.h> |
dbf60b07 | 32 | # include <commctrl.h> |
0613f5d5 DN |
33 | # include <io.h> |
34 | # include <winsock2.h> | |
411b80a5 | 35 | |
411b80a5 JB |
36 | # define NO_SOCKETS_IN_FILE_SYSTEM |
37 | ||
aa0b6932 JB |
38 | # define HSOCKET SOCKET |
39 | # define CLOSE_SOCKET closesocket | |
aa0b6932 | 40 | # define INITIALIZE() (initialize_sockets ()) |
411b80a5 | 41 | |
728a982d DN |
42 | char *w32_getenv (char *); |
43 | #define egetenv(VAR) w32_getenv(VAR) | |
44 | ||
411b80a5 JB |
45 | #else /* !WINDOWSNT */ |
46 | ||
5e0944c6 DC |
47 | # ifdef HAVE_NTGUI |
48 | # include <windows.h> | |
49 | # endif /* HAVE_NTGUI */ | |
50 | ||
67c1df01 | 51 | # include "syswait.h" |
ed4a3730 | 52 | |
1e7823d0 JB |
53 | # ifdef HAVE_INET_SOCKETS |
54 | # include <netinet/in.h> | |
0613f5d5 DN |
55 | # ifdef HAVE_SOCKETS |
56 | # include <sys/types.h> | |
57 | # include <sys/socket.h> | |
58 | # include <sys/un.h> | |
59 | # endif /* HAVE_SOCKETS */ | |
1e7823d0 | 60 | # endif |
18d2ad29 | 61 | # include <arpa/inet.h> |
448d4085 | 62 | |
e35fc962 | 63 | # define INVALID_SOCKET -1 |
aa0b6932 JB |
64 | # define HSOCKET int |
65 | # define CLOSE_SOCKET close | |
aa0b6932 | 66 | # define INITIALIZE() |
411b80a5 | 67 | |
728a982d DN |
68 | #define egetenv(VAR) getenv(VAR) |
69 | ||
411b80a5 | 70 | #endif /* !WINDOWSNT */ |
aa0b6932 | 71 | |
4e23f2ba | 72 | #undef signal |
46cec291 | 73 | |
42073bfb | 74 | #include <stdarg.h> |
e69233c2 | 75 | #include <ctype.h> |
8f9aaa0a | 76 | #include <stdio.h> |
613f7bda | 77 | #include <getopt.h> |
4004364e | 78 | #include <unistd.h> |
8f9aaa0a | 79 | |
0613f5d5 | 80 | #include <pwd.h> |
dc4a4a14 | 81 | #include <sys/stat.h> |
9628b887 | 82 | #include <signal.h> |
4d553a13 | 83 | #include <errno.h> |
9628b887 | 84 | |
8f9aaa0a RS |
85 | #ifndef VERSION |
86 | #define VERSION "unspecified" | |
87 | #endif | |
88 | \f | |
aa0b6932 JB |
89 | |
90 | #ifndef EXIT_SUCCESS | |
91 | #define EXIT_SUCCESS 0 | |
92 | #endif | |
93 | ||
94 | #ifndef EXIT_FAILURE | |
95 | #define EXIT_FAILURE 1 | |
96 | #endif | |
97 | ||
bc558f3e JB |
98 | /* Additional space when allocating buffers for filenames, etc. */ |
99 | #define EXTRA_SPACE 100 | |
100 | ||
069a7756 JB |
101 | #ifdef min |
102 | #undef min | |
103 | #endif | |
1e6f32f8 JM |
104 | #define min(x, y) (((x) < (y)) ? (x) : (y)) |
105 | ||
aa0b6932 | 106 | \f |
8f9aaa0a | 107 | /* Name used to invoke this program. */ |
728a982d | 108 | const char *progname; |
8f9aaa0a | 109 | |
0a125897 KL |
110 | /* The second argument to main. */ |
111 | char **main_argv; | |
112 | ||
749ae770 | 113 | /* Nonzero means don't wait for a response from Emacs. --no-wait. */ |
8f9aaa0a RS |
114 | int nowait = 0; |
115 | ||
0b973fc5 DW |
116 | /* Nonzero means don't print messages for successful operations. --quiet. */ |
117 | int quiet = 0; | |
118 | ||
30be2360 SM |
119 | /* Nonzero means args are expressions to be evaluated. --eval. */ |
120 | int eval = 0; | |
121 | ||
31fa6595 SM |
122 | /* Nonzero means don't open a new frame. Inverse of --create-frame. */ |
123 | int current_frame = 1; | |
92071250 | 124 | |
30be2360 | 125 | /* The display on which Emacs should work. --display. */ |
988e88ab | 126 | const char *display = NULL; |
30be2360 | 127 | |
6b59694e DC |
128 | /* The alternate display we should try if Emacs does not support display. */ |
129 | const char *alt_display = NULL; | |
130 | ||
0191e222 CY |
131 | /* The parent window ID, if we are opening a frame via XEmbed. */ |
132 | char *parent_id = NULL; | |
133 | ||
9628b887 | 134 | /* Nonzero means open a new Emacs frame on the current terminal. */ |
77134727 | 135 | int tty = 0; |
9628b887 | 136 | |
30be2360 SM |
137 | /* If non-NULL, the name of an editor to fallback to if the server |
138 | is not running. --alternate-editor. */ | |
b03d27bd | 139 | const char *alternate_editor = NULL; |
30be2360 | 140 | |
3db926be | 141 | /* If non-NULL, the filename of the UNIX socket. */ |
6b0c8984 | 142 | const char *socket_name = NULL; |
254107e4 | 143 | |
aa0b6932 | 144 | /* If non-NULL, the filename of the authentication file. */ |
988e88ab | 145 | const char *server_file = NULL; |
aa0b6932 | 146 | |
c66648e0 JB |
147 | /* PID of the Emacs server process. */ |
148 | int emacs_pid = 0; | |
149 | ||
18a4ce5e AR |
150 | /* If non-NULL, a string that should form a frame parameter alist to |
151 | be used for the new frame */ | |
152 | const char *frame_parameters = NULL; | |
153 | ||
845ca893 | 154 | static _Noreturn void print_help_and_exit (void); |
68441b90 | 155 | |
7f3bff3e | 156 | |
8f9aaa0a RS |
157 | struct option longopts[] = |
158 | { | |
749ae770 | 159 | { "no-wait", no_argument, NULL, 'n' }, |
0b973fc5 | 160 | { "quiet", no_argument, NULL, 'q' }, |
30be2360 | 161 | { "eval", no_argument, NULL, 'e' }, |
8f9aaa0a RS |
162 | { "help", no_argument, NULL, 'H' }, |
163 | { "version", no_argument, NULL, 'V' }, | |
b28c910d | 164 | { "tty", no_argument, NULL, 't' }, |
dc1cd5f7 | 165 | { "nw", no_argument, NULL, 't' }, |
31fa6595 | 166 | { "create-frame", no_argument, NULL, 'c' }, |
3cf8c6aa | 167 | { "alternate-editor", required_argument, NULL, 'a' }, |
18a4ce5e | 168 | { "frame-parameters", required_argument, NULL, 'F' }, |
b03d27bd | 169 | #ifndef NO_SOCKETS_IN_FILE_SYSTEM |
254107e4 | 170 | { "socket-name", required_argument, NULL, 's' }, |
b03d27bd | 171 | #endif |
aa0b6932 | 172 | { "server-file", required_argument, NULL, 'f' }, |
30be2360 | 173 | { "display", required_argument, NULL, 'd' }, |
0191e222 | 174 | { "parent-id", required_argument, NULL, 'p' }, |
30be2360 | 175 | { 0, 0, 0, 0 } |
8f9aaa0a RS |
176 | }; |
177 | ||
974b73e8 KL |
178 | \f |
179 | /* Like malloc but get fatal error if memory is exhausted. */ | |
180 | ||
17107bb6 PE |
181 | static void * |
182 | xmalloc (size_t size) | |
974b73e8 | 183 | { |
17107bb6 | 184 | void *result = malloc (size); |
974b73e8 KL |
185 | if (result == NULL) |
186 | { | |
187 | perror ("malloc"); | |
188 | exit (EXIT_FAILURE); | |
189 | } | |
190 | return result; | |
191 | } | |
192 | ||
974b73e8 KL |
193 | /* From sysdep.c */ |
194 | #if !defined (HAVE_GET_CURRENT_DIR_NAME) || defined (BROKEN_GET_CURRENT_DIR_NAME) | |
195 | ||
c5443aa5 | 196 | char *get_current_dir_name (void); |
cb06b8dc | 197 | |
974b73e8 | 198 | /* Return the current working directory. Returns NULL on errors. |
5ab73228 | 199 | Any other returned value must be freed with free. This is used |
974b73e8 KL |
200 | only when get_current_dir_name is not defined on the system. */ |
201 | char* | |
7c3320d8 | 202 | get_current_dir_name (void) |
974b73e8 KL |
203 | { |
204 | char *buf; | |
b9170155 | 205 | const char *pwd; |
974b73e8 | 206 | struct stat dotstat, pwdstat; |
9239d970 | 207 | /* If PWD is accurate, use it instead of calling getcwd. PWD is |
974b73e8 KL |
208 | sometimes a nicer name, and using it may avoid a fatal error if a |
209 | parent directory is searchable but not readable. */ | |
7ce8671d | 210 | if ((pwd = egetenv ("PWD")) != 0 |
974b73e8 KL |
211 | && (IS_DIRECTORY_SEP (*pwd) || (*pwd && IS_DEVICE_SEP (pwd[1]))) |
212 | && stat (pwd, &pwdstat) == 0 | |
213 | && stat (".", &dotstat) == 0 | |
214 | && dotstat.st_ino == pwdstat.st_ino | |
215 | && dotstat.st_dev == pwdstat.st_dev | |
216 | #ifdef MAXPATHLEN | |
217 | && strlen (pwd) < MAXPATHLEN | |
218 | #endif | |
219 | ) | |
220 | { | |
221 | buf = (char *) xmalloc (strlen (pwd) + 1); | |
974b73e8 KL |
222 | strcpy (buf, pwd); |
223 | } | |
974b73e8 KL |
224 | else |
225 | { | |
226 | size_t buf_size = 1024; | |
974b73e8 KL |
227 | for (;;) |
228 | { | |
17107bb6 PE |
229 | int tmp_errno; |
230 | buf = malloc (buf_size); | |
231 | if (! buf) | |
232 | break; | |
974b73e8 KL |
233 | if (getcwd (buf, buf_size) == buf) |
234 | break; | |
17107bb6 PE |
235 | tmp_errno = errno; |
236 | free (buf); | |
237 | if (tmp_errno != ERANGE) | |
974b73e8 | 238 | { |
974b73e8 KL |
239 | errno = tmp_errno; |
240 | return NULL; | |
241 | } | |
242 | buf_size *= 2; | |
17107bb6 PE |
243 | if (! buf_size) |
244 | { | |
245 | errno = ENOMEM; | |
246 | return NULL; | |
247 | } | |
974b73e8 KL |
248 | } |
249 | } | |
974b73e8 KL |
250 | return buf; |
251 | } | |
252 | #endif | |
253 | ||
42073bfb | 254 | #ifdef WINDOWSNT |
7ce8671d | 255 | |
a54af40e EZ |
256 | /* Like strdup but get a fatal error if memory is exhausted. */ |
257 | ||
258 | char * | |
259 | xstrdup (const char *s) | |
260 | { | |
261 | char *result = strdup (s); | |
262 | if (result == NULL) | |
263 | { | |
264 | perror ("strdup"); | |
265 | exit (EXIT_FAILURE); | |
266 | } | |
267 | return result; | |
268 | } | |
269 | ||
7ce8671d JB |
270 | #define REG_ROOT "SOFTWARE\\GNU\\Emacs" |
271 | ||
272 | /* Retrieve an environment variable from the Emacs subkeys of the registry. | |
273 | Return NULL if the variable was not found, or it was empty. | |
274 | This code is based on w32_get_resource (w32.c). */ | |
275 | char * | |
7c3320d8 | 276 | w32_get_resource (HKEY predefined, char *key, LPDWORD type) |
7ce8671d JB |
277 | { |
278 | HKEY hrootkey = NULL; | |
279 | char *result = NULL; | |
280 | DWORD cbData; | |
281 | ||
282 | if (RegOpenKeyEx (predefined, REG_ROOT, 0, KEY_READ, &hrootkey) == ERROR_SUCCESS) | |
283 | { | |
284 | if (RegQueryValueEx (hrootkey, key, NULL, NULL, NULL, &cbData) == ERROR_SUCCESS) | |
285 | { | |
286 | result = (char *) xmalloc (cbData); | |
287 | ||
bc558f3e JB |
288 | if ((RegQueryValueEx (hrootkey, key, NULL, type, result, &cbData) != ERROR_SUCCESS) |
289 | || (*result == 0)) | |
7ce8671d JB |
290 | { |
291 | free (result); | |
292 | result = NULL; | |
293 | } | |
294 | } | |
295 | ||
296 | RegCloseKey (hrootkey); | |
297 | } | |
298 | ||
299 | return result; | |
300 | } | |
301 | ||
302 | /* | |
303 | getenv wrapper for Windows | |
304 | ||
a54af40e EZ |
305 | Value is allocated on the heap, and can be free'd. |
306 | ||
307 | This is needed to duplicate Emacs's behavior, which is to look for | |
308 | environment variables in the registry if they don't appear in the | |
309 | environment. */ | |
7ce8671d | 310 | char * |
7c3320d8 | 311 | w32_getenv (char *envvar) |
7ce8671d JB |
312 | { |
313 | char *value; | |
314 | DWORD dwType; | |
315 | ||
657d08d3 | 316 | if ((value = getenv (envvar))) |
a54af40e EZ |
317 | /* Found in the environment. strdup it, because values returned |
318 | by getenv cannot be free'd. */ | |
319 | return xstrdup (value); | |
7ce8671d JB |
320 | |
321 | if (! (value = w32_get_resource (HKEY_CURRENT_USER, envvar, &dwType)) && | |
322 | ! (value = w32_get_resource (HKEY_LOCAL_MACHINE, envvar, &dwType))) | |
d41784ee EZ |
323 | { |
324 | /* "w32console" is what Emacs on Windows uses for tty-type under -nw. */ | |
325 | if (strcmp (envvar, "TERM") == 0) | |
a54af40e | 326 | return xstrdup ("w32console"); |
d41784ee EZ |
327 | /* Found neither in the environment nor in the registry. */ |
328 | return NULL; | |
329 | } | |
7ce8671d JB |
330 | |
331 | if (dwType == REG_SZ) | |
332 | /* Registry; no need to expand. */ | |
333 | return value; | |
334 | ||
335 | if (dwType == REG_EXPAND_SZ) | |
336 | { | |
337 | DWORD size; | |
338 | ||
657d08d3 | 339 | if ((size = ExpandEnvironmentStrings (value, NULL, 0))) |
7ce8671d JB |
340 | { |
341 | char *buffer = (char *) xmalloc (size); | |
342 | if (ExpandEnvironmentStrings (value, buffer, size)) | |
343 | { | |
344 | /* Found and expanded. */ | |
345 | free (value); | |
346 | return buffer; | |
347 | } | |
348 | ||
349 | /* Error expanding. */ | |
350 | free (buffer); | |
351 | } | |
352 | } | |
353 | ||
354 | /* Not the right type, or not correctly expanded. */ | |
355 | free (value); | |
356 | return NULL; | |
357 | } | |
358 | ||
ff90fbde | 359 | |
42073bfb | 360 | int |
7c3320d8 | 361 | w32_window_app (void) |
42073bfb JB |
362 | { |
363 | static int window_app = -1; | |
364 | char szTitle[MAX_PATH]; | |
365 | ||
366 | if (window_app < 0) | |
dbf60b07 JR |
367 | { |
368 | /* Checking for STDOUT does not work; it's a valid handle also in | |
369 | nonconsole apps. Testing for the console title seems to work. */ | |
370 | window_app = (GetConsoleTitleA (szTitle, MAX_PATH) == 0); | |
371 | if (window_app) | |
361358ea | 372 | InitCommonControls (); |
dbf60b07 | 373 | } |
42073bfb JB |
374 | |
375 | return window_app; | |
376 | } | |
105faa84 | 377 | |
79432772 | 378 | /* execvp wrapper for Windows. Quotes arguments with embedded spaces. |
105faa84 DN |
379 | |
380 | This is necessary due to the broken implementation of exec* routines in | |
381 | the Microsoft libraries: they concatenate the arguments together without | |
382 | quoting special characters, and pass the result to CreateProcess, with | |
7c3320d8 | 383 | predictably bad results. By contrast, POSIX execvp passes the arguments |
79432772 JB |
384 | directly into the argv array of the child process. */ |
385 | ||
105faa84 | 386 | int |
7c3320d8 | 387 | w32_execvp (const char *path, char **argv) |
105faa84 DN |
388 | { |
389 | int i; | |
ad0a19b7 | 390 | extern int execvp (const char*, char **); |
105faa84 DN |
391 | |
392 | /* Required to allow a .BAT script as alternate editor. */ | |
393 | argv[0] = (char *) alternate_editor; | |
394 | ||
395 | for (i = 0; argv[i]; i++) | |
396 | if (strchr (argv[i], ' ')) | |
397 | { | |
398 | char *quoted = alloca (strlen (argv[i]) + 3); | |
399 | sprintf (quoted, "\"%s\"", argv[i]); | |
400 | argv[i] = quoted; | |
401 | } | |
402 | ||
403 | return execvp (path, argv); | |
404 | } | |
405 | ||
406 | #undef execvp | |
407 | #define execvp w32_execvp | |
408 | ||
d41784ee EZ |
409 | /* Emulation of ttyname for Windows. */ |
410 | char * | |
411 | ttyname (int fd) | |
412 | { | |
413 | return "CONOUT$"; | |
414 | } | |
415 | ||
105faa84 | 416 | #endif /* WINDOWSNT */ |
42073bfb | 417 | |
f387c1ee JB |
418 | /* Display a normal or error message. |
419 | On Windows, use a message box if compiled as a Windows app. */ | |
96c06863 | 420 | static void message (bool, const char *, ...) ATTRIBUTE_FORMAT_PRINTF (2, 3); |
b23b5a5b | 421 | static void |
96c06863 | 422 | message (bool is_error, const char *format, ...) |
42073bfb | 423 | { |
42073bfb JB |
424 | va_list args; |
425 | ||
b0bbc07d | 426 | va_start (args, format); |
42073bfb JB |
427 | |
428 | #ifdef WINDOWSNT | |
429 | if (w32_window_app ()) | |
430 | { | |
17107bb6 PE |
431 | char msg[2048]; |
432 | vsnprintf (msg, sizeof msg, format, args); | |
433 | msg[sizeof msg - 1] = '\0'; | |
434 | ||
42073bfb JB |
435 | if (is_error) |
436 | MessageBox (NULL, msg, "Emacsclient ERROR", MB_ICONERROR); | |
437 | else | |
438 | MessageBox (NULL, msg, "Emacsclient", MB_ICONINFORMATION); | |
439 | } | |
440 | else | |
441 | #endif | |
9219db75 JB |
442 | { |
443 | FILE *f = is_error ? stderr : stdout; | |
444 | ||
17107bb6 | 445 | vfprintf (f, format, args); |
9219db75 JB |
446 | fflush (f); |
447 | } | |
17107bb6 PE |
448 | |
449 | va_end (args); | |
42073bfb JB |
450 | } |
451 | ||
8f9aaa0a | 452 | /* Decode the options from argv and argc. |
5212210c | 453 | The global variable `optind' will say how many arguments we used up. */ |
8f9aaa0a | 454 | |
b23b5a5b | 455 | static void |
873fbd0b | 456 | decode_options (int argc, char **argv) |
8f9aaa0a | 457 | { |
7ce8671d | 458 | alternate_editor = egetenv ("ALTERNATE_EDITOR"); |
0ea5797a | 459 | |
8f9aaa0a RS |
460 | while (1) |
461 | { | |
dc1cd5f7 | 462 | int opt = getopt_long_only (argc, argv, |
b03d27bd | 463 | #ifndef NO_SOCKETS_IN_FILE_SYSTEM |
3794a2d3 | 464 | "VHneqa:s:f:d:F:tc", |
b03d27bd | 465 | #else |
3794a2d3 | 466 | "VHneqa:f:d:F:tc", |
b03d27bd | 467 | #endif |
974b73e8 | 468 | longopts, 0); |
8f9aaa0a RS |
469 | |
470 | if (opt == EOF) | |
471 | break; | |
472 | ||
473 | switch (opt) | |
474 | { | |
475 | case 0: | |
476 | /* If getopt returns 0, then it has already processed a | |
477 | long-named option. We should do nothing. */ | |
478 | break; | |
e69233c2 | 479 | |
97e3214d GM |
480 | case 'a': |
481 | alternate_editor = optarg; | |
482 | break; | |
e69233c2 | 483 | |
b03d27bd | 484 | #ifndef NO_SOCKETS_IN_FILE_SYSTEM |
254107e4 RS |
485 | case 's': |
486 | socket_name = optarg; | |
487 | break; | |
b03d27bd | 488 | #endif |
254107e4 | 489 | |
aa0b6932 JB |
490 | case 'f': |
491 | server_file = optarg; | |
492 | break; | |
254107e4 | 493 | |
0ea5797a SM |
494 | /* We used to disallow this argument in w32, but it seems better |
495 | to allow it, for the occasional case where the user is | |
496 | connecting with a w32 client to a server compiled with X11 | |
497 | support. */ | |
30be2360 SM |
498 | case 'd': |
499 | display = optarg; | |
500 | break; | |
501 | ||
8f9aaa0a RS |
502 | case 'n': |
503 | nowait = 1; | |
504 | break; | |
505 | ||
30be2360 SM |
506 | case 'e': |
507 | eval = 1; | |
508 | break; | |
509 | ||
0b973fc5 DW |
510 | case 'q': |
511 | quiet = 1; | |
512 | break; | |
513 | ||
8f9aaa0a | 514 | case 'V': |
96c06863 | 515 | message (false, "emacsclient %s\n", VERSION); |
65396510 | 516 | exit (EXIT_SUCCESS); |
8f9aaa0a | 517 | break; |
46cec291 | 518 | |
819b8f00 | 519 | case 't': |
77134727 | 520 | tty = 1; |
c1b8e896 | 521 | current_frame = 0; |
77134727 KL |
522 | break; |
523 | ||
e5299d8d | 524 | case 'c': |
31fa6595 | 525 | current_frame = 0; |
9628b887 | 526 | break; |
0b0d3e0b | 527 | |
0191e222 CY |
528 | case 'p': |
529 | parent_id = optarg; | |
530 | current_frame = 0; | |
531 | break; | |
532 | ||
8f9aaa0a | 533 | case 'H': |
8f9aaa0a | 534 | print_help_and_exit (); |
20c396e8 JB |
535 | break; |
536 | ||
18a4ce5e AR |
537 | case 'F': |
538 | frame_parameters = optarg; | |
539 | break; | |
540 | ||
20c396e8 | 541 | default: |
96c06863 | 542 | message (true, "Try `%s --help' for more information\n", progname); |
65396510 | 543 | exit (EXIT_FAILURE); |
20c396e8 | 544 | break; |
8f9aaa0a RS |
545 | } |
546 | } | |
9628b887 | 547 | |
273b9028 CY |
548 | /* If the -c option is used (without -t) and no --display argument |
549 | is provided, try $DISPLAY. | |
550 | Without the -c option, we used to set `display' to $DISPLAY by | |
551 | default, but this changed the default behavior and is sometimes | |
552 | inconvenient. So we force users to use "--display $DISPLAY" if | |
6b59694e DC |
553 | they want Emacs to connect to their current display. |
554 | ||
555 | Some window systems have a notion of default display not | |
556 | reflected in the DISPLAY variable. If the user didn't give us an | |
557 | explicit display, try this platform-specific after trying the | |
558 | display in DISPLAY (if any). */ | |
09317bf4 | 559 | if (!current_frame && !tty && !display) |
e7534fc4 | 560 | { |
6b59694e DC |
561 | /* Set these here so we use a default_display only when the user |
562 | didn't give us an explicit display. */ | |
563 | #if defined (NS_IMPL_COCOA) | |
564 | alt_display = "ns"; | |
565 | #elif defined (HAVE_NTGUI) | |
efc3dd3c | 566 | alt_display = "w32"; |
e7534fc4 | 567 | #endif |
6b59694e DC |
568 | |
569 | display = egetenv ("DISPLAY"); | |
570 | } | |
571 | ||
572 | if (!display) | |
573 | { | |
574 | display = alt_display; | |
575 | alt_display = NULL; | |
e7534fc4 | 576 | } |
9997dc15 | 577 | |
273b9028 | 578 | /* A null-string display is invalid. */ |
0ea5797a SM |
579 | if (display && strlen (display) == 0) |
580 | display = NULL; | |
581 | ||
273b9028 CY |
582 | /* If no display is available, new frames are tty frames. */ |
583 | if (!current_frame && !display) | |
92071250 | 584 | tty = 1; |
c0f342ab | 585 | |
802bdb3c | 586 | #ifdef WINDOWSNT |
9a864fa2 CY |
587 | /* Emacs on Windows does not support graphical and text terminal |
588 | frames in the same instance. So, treat the -t and -c options as | |
589 | equivalent, and open a new frame on the server's terminal. | |
590 | Ideally, we would only set tty = 1 when the serve is running in a | |
591 | console, but alas we don't know that. As a workaround, always | |
592 | ask for a tty frame, and let server.el figure it out. */ | |
593 | if (!current_frame) | |
594 | { | |
595 | display = NULL; | |
596 | tty = 1; | |
597 | } | |
598 | ||
69157c99 | 599 | if (alternate_editor && alternate_editor[0] == '\0') |
802bdb3c | 600 | { |
96c06863 | 601 | message (true, "--alternate-editor argument or ALTERNATE_EDITOR variable cannot be\n\ |
802bdb3c DN |
602 | an empty string"); |
603 | exit (EXIT_FAILURE); | |
604 | } | |
605 | #endif /* WINDOWSNT */ | |
8f9aaa0a RS |
606 | } |
607 | ||
974b73e8 | 608 | \f |
845ca893 | 609 | static _Noreturn void |
873fbd0b | 610 | print_help_and_exit (void) |
8f9aaa0a | 611 | { |
c0f342ab JB |
612 | /* Spaces and tabs are significant in this message; they're chosen so the |
613 | message aligns properly both in a tty and in a Windows message box. | |
614 | Please try to preserve them; otherwise the output is very hard to read | |
615 | when using emacsclientw. */ | |
96c06863 | 616 | message (false, |
29abe551 | 617 | "Usage: %s [OPTIONS] FILE...\n%s%s%s", progname, "\ |
30be2360 SM |
618 | Tell the Emacs server to visit the specified files.\n\ |
619 | Every FILE can be either just a FILENAME or [+LINE[:COLUMN]] FILENAME.\n\ | |
20c396e8 | 620 | \n\ |
30be2360 | 621 | The following OPTIONS are accepted:\n\ |
c0f342ab JB |
622 | -V, --version Just print version info and return\n\ |
623 | -H, --help Print this usage information message\n\ | |
dc1cd5f7 | 624 | -nw, -t, --tty Open a new Emacs frame on the current terminal\n\ |
c4b858e3 | 625 | -c, --create-frame Create a new frame instead of trying to\n\ |
9dfda22f | 626 | use the current Emacs frame\n\ |
29abe551 | 627 | ", "\ |
a150502a | 628 | -F ALIST, --frame-parameters=ALIST\n\ |
5f9388d0 | 629 | Set the parameters of a new frame\n\ |
c0f342ab | 630 | -e, --eval Evaluate the FILE arguments as ELisp expressions\n\ |
d07529f3 | 631 | -n, --no-wait Don't wait for the server to return\n\ |
0b973fc5 | 632 | -q, --quiet Don't display messages on success\n\ |
24d5010d | 633 | -d DISPLAY, --display=DISPLAY\n\ |
0191e222 | 634 | Visit the file in the given display\n\ |
29abe551 | 635 | ", "\ |
0191e222 | 636 | --parent-id=ID Open in parent window ID, via XEmbed\n" |
aa0b6932 | 637 | #ifndef NO_SOCKETS_IN_FILE_SYSTEM |
24d5010d | 638 | "-s SOCKET, --socket-name=SOCKET\n\ |
9dfda22f | 639 | Set filename of the UNIX socket for communication\n" |
aa0b6932 | 640 | #endif |
24d5010d | 641 | "-f SERVER, --server-file=SERVER\n\ |
9dfda22f | 642 | Set filename of the TCP authentication file\n\ |
24d5010d | 643 | -a EDITOR, --alternate-editor=EDITOR\n\ |
9dfda22f | 644 | Editor to fallback to if the server is not running\n" |
6133a1a9 | 645 | #ifndef WINDOWSNT |
c3f995a2 JB |
646 | " If EDITOR is the empty string, start Emacs in daemon\n\ |
647 | mode and try connecting again\n" | |
6133a1a9 | 648 | #endif /* not WINDOWSNT */ |
c3f995a2 | 649 | "\n\ |
29abe551 | 650 | Report bugs with M-x report-emacs-bug.\n"); |
65396510 | 651 | exit (EXIT_SUCCESS); |
8f9aaa0a | 652 | } |
5212210c | 653 | |
79432772 JB |
654 | /* Try to run a different command, or --if no alternate editor is |
655 | defined-- exit with an errorcode. | |
656 | Uses argv, but gets it from the global variable main_argv. */ | |
657 | ||
845ca893 | 658 | static _Noreturn void |
974b73e8 | 659 | fail (void) |
9002956f | 660 | { |
aa0b6932 | 661 | if (alternate_editor) |
9002956f | 662 | { |
aa0b6932 | 663 | int i = optind - 1; |
4472aef4 | 664 | |
974b73e8 | 665 | execvp (alternate_editor, main_argv + i); |
96c06863 | 666 | message (true, "%s: error executing alternate editor \"%s\"\n", |
974b73e8 | 667 | progname, alternate_editor); |
9002956f | 668 | } |
aa0b6932 | 669 | exit (EXIT_FAILURE); |
9002956f KL |
670 | } |
671 | ||
aa0b6932 | 672 | \f |
1e7823d0 | 673 | #if !defined (HAVE_SOCKETS) || !defined (HAVE_INET_SOCKETS) |
9002956f | 674 | |
aa0b6932 | 675 | int |
0613f5d5 | 676 | main (int argc, char **argv) |
9002956f | 677 | { |
974b73e8 KL |
678 | main_argv = argv; |
679 | progname = argv[0]; | |
96c06863 | 680 | message (true, "%s: Sorry, the Emacs server is supported only\n" |
c0f342ab | 681 | "on systems with Berkeley sockets.\n", |
aa0b6932 | 682 | argv[0]); |
974b73e8 | 683 | fail (); |
9002956f KL |
684 | } |
685 | ||
1e7823d0 | 686 | #else /* HAVE_SOCKETS && HAVE_INET_SOCKETS */ |
2828d5f9 | 687 | |
aa0b6932 JB |
688 | #define AUTH_KEY_LENGTH 64 |
689 | #define SEND_BUFFER_SIZE 4096 | |
690 | ||
aa0b6932 JB |
691 | /* Buffer to accumulate data to send in TCP connections. */ |
692 | char send_buffer[SEND_BUFFER_SIZE + 1]; | |
693 | int sblen = 0; /* Fill pointer for the send buffer. */ | |
4b7b77f6 JR |
694 | /* Socket used to communicate with the Emacs server process. */ |
695 | HSOCKET emacs_socket = 0; | |
aa0b6932 | 696 | |
79432772 JB |
697 | /* On Windows, the socket library was historically separate from the |
698 | standard C library, so errors are handled differently. */ | |
699 | ||
b23b5a5b | 700 | static void |
988e88ab | 701 | sock_err_message (const char *function_name) |
d22b00e5 JR |
702 | { |
703 | #ifdef WINDOWSNT | |
704 | char* msg = NULL; | |
705 | ||
706 | FormatMessage (FORMAT_MESSAGE_FROM_SYSTEM | |
707 | | FORMAT_MESSAGE_ALLOCATE_BUFFER | |
708 | | FORMAT_MESSAGE_ARGUMENT_ARRAY, | |
709 | NULL, WSAGetLastError (), 0, (LPTSTR)&msg, 0, NULL); | |
710 | ||
96c06863 | 711 | message (true, "%s: %s: %s\n", progname, function_name, msg); |
d22b00e5 JR |
712 | |
713 | LocalFree (msg); | |
714 | #else | |
96c06863 | 715 | message (true, "%s: %s: %s\n", progname, function_name, strerror (errno)); |
d22b00e5 JR |
716 | #endif |
717 | } | |
718 | ||
719 | ||
aa0b6932 JB |
720 | /* Let's send the data to Emacs when either |
721 | - the data ends in "\n", or | |
722 | - the buffer is full (but this shouldn't happen) | |
723 | Otherwise, we just accumulate it. */ | |
b23b5a5b | 724 | static void |
988e88ab | 725 | send_to_emacs (HSOCKET s, const char *data) |
aa0b6932 | 726 | { |
1e6f32f8 JM |
727 | size_t dlen; |
728 | ||
729 | if (!data) | |
730 | return; | |
731 | ||
732 | dlen = strlen (data); | |
733 | while (*data) | |
2828d5f9 | 734 | { |
1e6f32f8 JM |
735 | size_t part = min (dlen, SEND_BUFFER_SIZE - sblen); |
736 | memcpy (&send_buffer[sblen], data, part); | |
737 | data += part; | |
738 | sblen += part; | |
aa0b6932 JB |
739 | |
740 | if (sblen == SEND_BUFFER_SIZE | |
741 | || (sblen > 0 && send_buffer[sblen-1] == '\n')) | |
742 | { | |
743 | int sent = send (s, send_buffer, sblen, 0); | |
1e6f32f8 JM |
744 | if (sent < 0) |
745 | { | |
96c06863 | 746 | message (true, "%s: failed to send %d bytes to socket: %s\n", |
1e6f32f8 JM |
747 | progname, sblen, strerror (errno)); |
748 | fail (); | |
749 | } | |
aa0b6932 | 750 | if (sent != sblen) |
1e6f32f8 | 751 | memmove (send_buffer, &send_buffer[sent], sblen - sent); |
aa0b6932 JB |
752 | sblen -= sent; |
753 | } | |
1e6f32f8 JM |
754 | |
755 | dlen -= part; | |
2828d5f9 | 756 | } |
2828d5f9 | 757 | } |
2828d5f9 KL |
758 | |
759 | \f | |
0b0d3e0b | 760 | /* In STR, insert a & before each &, each space, each newline, and |
a4cf2096 | 761 | any initial -. Change spaces to underscores, too, so that the |
0b0d3e0b KL |
762 | return value never contains a space. |
763 | ||
3a35a84c | 764 | Does not change the string. Outputs the result to S. */ |
b23b5a5b | 765 | static void |
988e88ab | 766 | quote_argument (HSOCKET s, const char *str) |
5212210c | 767 | { |
9002956f | 768 | char *copy = (char *) xmalloc (strlen (str) * 2 + 1); |
988e88ab J |
769 | const char *p; |
770 | char *q; | |
5212210c | 771 | |
0b0d3e0b | 772 | p = str; |
5212210c RS |
773 | q = copy; |
774 | while (*p) | |
775 | { | |
776 | if (*p == ' ') | |
777 | { | |
f1db6a73 | 778 | *q++ = '&'; |
5212210c RS |
779 | *q++ = '_'; |
780 | p++; | |
781 | } | |
3cf8c6aa SM |
782 | else if (*p == '\n') |
783 | { | |
784 | *q++ = '&'; | |
785 | *q++ = 'n'; | |
786 | p++; | |
787 | } | |
5212210c RS |
788 | else |
789 | { | |
0b0d3e0b | 790 | if (*p == '&' || (*p == '-' && p == str)) |
f1db6a73 | 791 | *q++ = '&'; |
5212210c RS |
792 | *q++ = *p++; |
793 | } | |
794 | } | |
f1db6a73 | 795 | *q++ = 0; |
5212210c | 796 | |
486ba65f | 797 | send_to_emacs (s, copy); |
87209357 EZ |
798 | |
799 | free (copy); | |
5212210c | 800 | } |
0c76956f | 801 | |
0b0d3e0b KL |
802 | |
803 | /* The inverse of quote_argument. Removes quoting in string STR by | |
79432772 | 804 | modifying the string in place. Returns STR. */ |
0b0d3e0b | 805 | |
b23b5a5b | 806 | static char * |
873fbd0b | 807 | unquote_argument (char *str) |
0b0d3e0b KL |
808 | { |
809 | char *p, *q; | |
810 | ||
811 | if (! str) | |
812 | return str; | |
813 | ||
814 | p = str; | |
815 | q = str; | |
816 | while (*p) | |
817 | { | |
818 | if (*p == '&') | |
819 | { | |
820 | p++; | |
821 | if (*p == '&') | |
822 | *p = '&'; | |
823 | else if (*p == '_') | |
824 | *p = ' '; | |
825 | else if (*p == 'n') | |
826 | *p = '\n'; | |
827 | else if (*p == '-') | |
828 | *p = '-'; | |
829 | } | |
830 | *q++ = *p++; | |
831 | } | |
832 | *q = 0; | |
833 | return str; | |
834 | } | |
835 | ||
8f9aaa0a | 836 | \f |
b23b5a5b | 837 | static int |
03fc768b | 838 | file_name_absolute_p (const char *filename) |
b03d27bd JB |
839 | { |
840 | /* Sanity check, it shouldn't happen. */ | |
96c06863 | 841 | if (! filename) return false; |
b03d27bd JB |
842 | |
843 | /* /xxx is always an absolute path. */ | |
96c06863 | 844 | if (filename[0] == '/') return true; |
b03d27bd JB |
845 | |
846 | /* Empty filenames (which shouldn't happen) are relative. */ | |
96c06863 | 847 | if (filename[0] == '\0') return false; |
b03d27bd JB |
848 | |
849 | #ifdef WINDOWSNT | |
71b8f735 | 850 | /* X:\xxx is always absolute. */ |
03fc768b | 851 | if (isalpha ((unsigned char) filename[0]) |
cb0297bb | 852 | && filename[1] == ':' && (filename[2] == '\\' || filename[2] == '/')) |
96c06863 | 853 | return true; |
b03d27bd JB |
854 | |
855 | /* Both \xxx and \\xxx\yyy are absolute. */ | |
96c06863 | 856 | if (filename[0] == '\\') return true; |
b03d27bd JB |
857 | #endif |
858 | ||
96c06863 | 859 | return false; |
b03d27bd JB |
860 | } |
861 | ||
aa0b6932 | 862 | #ifdef WINDOWSNT |
f0384499 | 863 | /* Wrapper to make WSACleanup a cdecl, as required by atexit. */ |
7c3320d8 JB |
864 | void __cdecl |
865 | close_winsock (void) | |
aa0b6932 JB |
866 | { |
867 | WSACleanup (); | |
868 | } | |
0c76956f | 869 | |
b03d27bd JB |
870 | /* Initialize the WinSock2 library. */ |
871 | void | |
7c3320d8 | 872 | initialize_sockets (void) |
0c76956f | 873 | { |
aa0b6932 JB |
874 | WSADATA wsaData; |
875 | ||
aa0b6932 JB |
876 | if (WSAStartup (MAKEWORD (2, 0), &wsaData)) |
877 | { | |
96c06863 | 878 | message (true, "%s: error initializing WinSock2\n", progname); |
aa0b6932 JB |
879 | exit (EXIT_FAILURE); |
880 | } | |
881 | ||
882 | atexit (close_winsock); | |
0c76956f | 883 | } |
e35fc962 | 884 | #endif /* WINDOWSNT */ |
974b73e8 | 885 | |
8f9aaa0a | 886 | \f |
79432772 JB |
887 | /* Read the information needed to set up a TCP comm channel with |
888 | the Emacs server: host, port, and authentication string. */ | |
889 | ||
b23b5a5b | 890 | static int |
6b0c8984 AS |
891 | get_server_config (const char *config_file, struct sockaddr_in *server, |
892 | char *authentication) | |
97e3214d | 893 | { |
aa0b6932 JB |
894 | char dotted[32]; |
895 | char *port; | |
b03d27bd | 896 | FILE *config = NULL; |
aa0b6932 | 897 | |
6b0c8984 AS |
898 | if (file_name_absolute_p (config_file)) |
899 | config = fopen (config_file, "rb"); | |
b03d27bd | 900 | else |
97e3214d | 901 | { |
b9170155 | 902 | const char *home = egetenv ("HOME"); |
88b46d84 | 903 | |
aa0b6932 JB |
904 | if (home) |
905 | { | |
6b0c8984 | 906 | char *path = xmalloc (strlen (home) + strlen (config_file) |
17107bb6 PE |
907 | + EXTRA_SPACE); |
908 | strcpy (path, home); | |
909 | strcat (path, "/.emacs.d/server/"); | |
6b0c8984 | 910 | strcat (path, config_file); |
aa0b6932 | 911 | config = fopen (path, "rb"); |
17107bb6 | 912 | free (path); |
aa0b6932 | 913 | } |
88b46d84 | 914 | #ifdef WINDOWSNT |
7ce8671d | 915 | if (!config && (home = egetenv ("APPDATA"))) |
88b46d84 | 916 | { |
6b0c8984 | 917 | char *path = xmalloc (strlen (home) + strlen (config_file) |
17107bb6 PE |
918 | + EXTRA_SPACE); |
919 | strcpy (path, home); | |
920 | strcat (path, "/.emacs.d/server/"); | |
6b0c8984 | 921 | strcat (path, config_file); |
88b46d84 | 922 | config = fopen (path, "rb"); |
17107bb6 | 923 | free (path); |
88b46d84 JB |
924 | } |
925 | #endif | |
aa0b6932 JB |
926 | } |
927 | ||
928 | if (! config) | |
96c06863 | 929 | return false; |
aa0b6932 JB |
930 | |
931 | if (fgets (dotted, sizeof dotted, config) | |
968ef9b4 JB |
932 | && (port = strchr (dotted, ':'))) |
933 | *port++ = '\0'; | |
97e3214d GM |
934 | else |
935 | { | |
96c06863 | 936 | message (true, "%s: invalid configuration info\n", progname); |
65396510 | 937 | exit (EXIT_FAILURE); |
97e3214d | 938 | } |
97e3214d | 939 | |
aa0b6932 JB |
940 | server->sin_family = AF_INET; |
941 | server->sin_addr.s_addr = inet_addr (dotted); | |
942 | server->sin_port = htons (atoi (port)); | |
97e3214d | 943 | |
aa0b6932 JB |
944 | if (! fread (authentication, AUTH_KEY_LENGTH, 1, config)) |
945 | { | |
96c06863 | 946 | message (true, "%s: cannot read authentication info\n", progname); |
aa0b6932 JB |
947 | exit (EXIT_FAILURE); |
948 | } | |
46cec291 | 949 | |
aa0b6932 | 950 | fclose (config); |
97e3214d | 951 | |
96c06863 | 952 | return true; |
97e3214d GM |
953 | } |
954 | ||
b23b5a5b | 955 | static HSOCKET |
6b0c8984 | 956 | set_tcp_socket (const char *local_server_file) |
aa0b6932 JB |
957 | { |
958 | HSOCKET s; | |
959 | struct sockaddr_in server; | |
aa0b6932 JB |
960 | struct linger l_arg = {1, 1}; |
961 | char auth_string[AUTH_KEY_LENGTH + 1]; | |
9628b887 | 962 | |
6b0c8984 | 963 | if (! get_server_config (local_server_file, &server, auth_string)) |
aa0b6932 JB |
964 | return INVALID_SOCKET; |
965 | ||
0b973fc5 | 966 | if (server.sin_addr.s_addr != inet_addr ("127.0.0.1") && !quiet) |
96c06863 | 967 | message (false, "%s: connected to remote socket at %s\n", |
b03d27bd JB |
968 | progname, inet_ntoa (server.sin_addr)); |
969 | ||
79432772 | 970 | /* Open up an AF_INET socket. */ |
aa0b6932 JB |
971 | if ((s = socket (AF_INET, SOCK_STREAM, IPPROTO_TCP)) < 0) |
972 | { | |
d22b00e5 | 973 | sock_err_message ("socket"); |
aa0b6932 JB |
974 | return INVALID_SOCKET; |
975 | } | |
976 | ||
79432772 | 977 | /* Set up the socket. */ |
aa0b6932 JB |
978 | if (connect (s, (struct sockaddr *) &server, sizeof server) < 0) |
979 | { | |
d22b00e5 | 980 | sock_err_message ("connect"); |
aa0b6932 JB |
981 | return INVALID_SOCKET; |
982 | } | |
983 | ||
aa0b6932 JB |
984 | setsockopt (s, SOL_SOCKET, SO_LINGER, (char *) &l_arg, sizeof l_arg); |
985 | ||
79432772 | 986 | /* Send the authentication. */ |
aa0b6932 JB |
987 | auth_string[AUTH_KEY_LENGTH] = '\0'; |
988 | ||
486ba65f JR |
989 | send_to_emacs (s, "-auth "); |
990 | send_to_emacs (s, auth_string); | |
5ab73228 | 991 | send_to_emacs (s, " "); |
aa0b6932 JB |
992 | |
993 | return s; | |
994 | } | |
995 | ||
b2ff54a0 JR |
996 | |
997 | /* Returns 1 if PREFIX is a prefix of STRING. */ | |
998 | static int | |
988e88ab | 999 | strprefix (const char *prefix, const char *string) |
b2ff54a0 | 1000 | { |
cb06b8dc | 1001 | return !strncmp (prefix, string, strlen (prefix)); |
b2ff54a0 JR |
1002 | } |
1003 | ||
a336ee5b CY |
1004 | /* Get tty name and type. If successful, return the type in TTY_TYPE |
1005 | and the name in TTY_NAME, and return 1. Otherwise, fail if NOABORT | |
1006 | is zero, or return 0 if NOABORT is non-zero. */ | |
1007 | ||
b23b5a5b | 1008 | static int |
b9170155 | 1009 | find_tty (const char **tty_type, const char **tty_name, int noabort) |
a336ee5b | 1010 | { |
b9170155 PE |
1011 | const char *type = egetenv ("TERM"); |
1012 | const char *name = ttyname (fileno (stdout)); | |
a336ee5b CY |
1013 | |
1014 | if (!name) | |
1015 | { | |
1016 | if (noabort) | |
1017 | return 0; | |
1018 | else | |
1019 | { | |
96c06863 | 1020 | message (true, "%s: could not get terminal name\n", progname); |
a336ee5b CY |
1021 | fail (); |
1022 | } | |
1023 | } | |
1024 | ||
1025 | if (!type) | |
1026 | { | |
1027 | if (noabort) | |
1028 | return 0; | |
1029 | else | |
1030 | { | |
96c06863 | 1031 | message (true, "%s: please set the TERM variable to your terminal type\n", |
a336ee5b CY |
1032 | progname); |
1033 | fail (); | |
1034 | } | |
1035 | } | |
1036 | ||
1037 | if (strcmp (type, "eterm") == 0) | |
1038 | { | |
1039 | if (noabort) | |
1040 | return 0; | |
1041 | else | |
1042 | { | |
1043 | /* This causes nasty, MULTI_KBOARD-related input lockouts. */ | |
96c06863 | 1044 | message (true, "%s: opening a frame in an Emacs term buffer" |
a336ee5b CY |
1045 | " is not supported\n", progname); |
1046 | fail (); | |
1047 | } | |
1048 | } | |
1049 | ||
1050 | *tty_name = name; | |
1051 | *tty_type = type; | |
1052 | return 1; | |
1053 | } | |
1054 | ||
b2ff54a0 | 1055 | |
aa0b6932 | 1056 | #if !defined (NO_SOCKETS_IN_FILE_SYSTEM) |
46cec291 | 1057 | |
9f637eea GM |
1058 | /* Three possibilities: |
1059 | 2 - can't be `stat'ed (sets errno) | |
1060 | 1 - isn't owned by us | |
1061 | 0 - success: none of the above */ | |
1062 | ||
1063 | static int | |
fe91f5a0 | 1064 | socket_status (const char *name) |
9f637eea GM |
1065 | { |
1066 | struct stat statbfr; | |
1067 | ||
b0bbc07d | 1068 | if (stat (name, &statbfr) == -1) |
9f637eea GM |
1069 | return 2; |
1070 | ||
1071 | if (statbfr.st_uid != geteuid ()) | |
1072 | return 1; | |
0b0d3e0b | 1073 | |
9f637eea GM |
1074 | return 0; |
1075 | } | |
1076 | ||
974b73e8 | 1077 | \f |
da8e1115 KL |
1078 | /* A signal handler that passes the signal to the Emacs process. |
1079 | Useful for SIGWINCH. */ | |
1080 | ||
9af30bdf | 1081 | static void |
428a555e | 1082 | pass_signal_to_emacs (int signalnum) |
9628b887 KL |
1083 | { |
1084 | int old_errno = errno; | |
1085 | ||
9f729af5 | 1086 | if (emacs_pid) |
428a555e | 1087 | kill (emacs_pid, signalnum); |
9f729af5 | 1088 | |
428a555e | 1089 | signal (signalnum, pass_signal_to_emacs); |
9f729af5 KL |
1090 | errno = old_errno; |
1091 | } | |
1092 | ||
0b0d3e0b KL |
1093 | /* Signal handler for SIGCONT; notify the Emacs process that it can |
1094 | now resume our tty frame. */ | |
1095 | ||
9af30bdf | 1096 | static void |
0b0d3e0b KL |
1097 | handle_sigcont (int signalnum) |
1098 | { | |
1099 | int old_errno = errno; | |
d050de75 PE |
1100 | pid_t pgrp = getpgrp (); |
1101 | pid_t tcpgrp = tcgetpgrp (1); | |
0b0d3e0b | 1102 | |
d050de75 | 1103 | if (tcpgrp == pgrp) |
0b0d3e0b | 1104 | { |
591debed | 1105 | /* We are in the foreground. */ |
486ba65f | 1106 | send_to_emacs (emacs_socket, "-resume \n"); |
0b0d3e0b | 1107 | } |
d050de75 | 1108 | else if (0 <= tcpgrp && tty) |
0b0d3e0b | 1109 | { |
591debed | 1110 | /* We are in the background; cancel the continue. */ |
d050de75 | 1111 | kill (-pgrp, SIGTTIN); |
0b0d3e0b | 1112 | } |
c6c53c3e KL |
1113 | |
1114 | signal (signalnum, handle_sigcont); | |
0b0d3e0b KL |
1115 | errno = old_errno; |
1116 | } | |
1117 | ||
1118 | /* Signal handler for SIGTSTP; notify the Emacs process that we are | |
1119 | going to sleep. Normally the suspend is initiated by Emacs via | |
1120 | server-handle-suspend-tty, but if the server gets out of sync with | |
1121 | reality, we may get a SIGTSTP on C-z. Handling this signal and | |
79432772 | 1122 | notifying Emacs about it should get things under control again. */ |
0b0d3e0b | 1123 | |
9af30bdf | 1124 | static void |
0b0d3e0b KL |
1125 | handle_sigtstp (int signalnum) |
1126 | { | |
1127 | int old_errno = errno; | |
1128 | sigset_t set; | |
c0f342ab | 1129 | |
90843190 | 1130 | if (emacs_socket) |
486ba65f | 1131 | send_to_emacs (emacs_socket, "-suspend \n"); |
0b0d3e0b | 1132 | |
5ab73228 | 1133 | /* Unblock this signal and call the default handler by temporarily |
8350f087 | 1134 | changing the handler and resignaling. */ |
0b0d3e0b KL |
1135 | sigprocmask (SIG_BLOCK, NULL, &set); |
1136 | sigdelset (&set, signalnum); | |
1137 | signal (signalnum, SIG_DFL); | |
a7db35b3 | 1138 | raise (signalnum); |
0b0d3e0b KL |
1139 | sigprocmask (SIG_SETMASK, &set, NULL); /* Let's the above signal through. */ |
1140 | signal (signalnum, handle_sigtstp); | |
1141 | ||
1142 | errno = old_errno; | |
1143 | } | |
273b9028 CY |
1144 | |
1145 | ||
da8e1115 | 1146 | /* Set up signal handlers before opening a frame on the current tty. */ |
0b0d3e0b | 1147 | |
b23b5a5b | 1148 | static void |
4d553a13 | 1149 | init_signals (void) |
9628b887 KL |
1150 | { |
1151 | /* Set up signal handlers. */ | |
428a555e | 1152 | signal (SIGWINCH, pass_signal_to_emacs); |
4ca927b4 KL |
1153 | |
1154 | /* Don't pass SIGINT and SIGQUIT to Emacs, because it has no way of | |
1155 | deciding which terminal the signal came from. C-g is now a | |
1156 | normal input event on secondary terminals. */ | |
1157 | #if 0 | |
428a555e KL |
1158 | signal (SIGINT, pass_signal_to_emacs); |
1159 | signal (SIGQUIT, pass_signal_to_emacs); | |
4ca927b4 | 1160 | #endif |
0b0d3e0b KL |
1161 | |
1162 | signal (SIGCONT, handle_sigcont); | |
1163 | signal (SIGTSTP, handle_sigtstp); | |
1164 | signal (SIGTTOU, handle_sigtstp); | |
9628b887 KL |
1165 | } |
1166 | ||
46cec291 | 1167 | |
b23b5a5b | 1168 | static HSOCKET |
6b0c8984 | 1169 | set_local_socket (const char *local_socket_name) |
46cec291 | 1170 | { |
aa0b6932 | 1171 | HSOCKET s; |
46cec291 | 1172 | struct sockaddr_un server; |
46cec291 | 1173 | |
79432772 | 1174 | /* Open up an AF_UNIX socket in this person's home directory. */ |
46cec291 RS |
1175 | if ((s = socket (AF_UNIX, SOCK_STREAM, 0)) < 0) |
1176 | { | |
96c06863 | 1177 | message (true, "%s: socket: %s\n", progname, strerror (errno)); |
aa0b6932 | 1178 | return INVALID_SOCKET; |
46cec291 | 1179 | } |
e69233c2 | 1180 | |
46cec291 | 1181 | server.sun_family = AF_UNIX; |
c5fee545 | 1182 | |
c5fee545 | 1183 | { |
6b0c8984 AS |
1184 | int sock_status; |
1185 | int use_tmpdir = 0; | |
1186 | int saved_errno; | |
1187 | const char *server_name = local_socket_name; | |
4be3dfc5 | 1188 | const char *tmpdir IF_LINT ( = NULL); |
17107bb6 PE |
1189 | char *tmpdir_storage = NULL; |
1190 | char *socket_name_storage = NULL; | |
0b0d3e0b | 1191 | |
6b0c8984 | 1192 | if (!strchr (local_socket_name, '/') && !strchr (local_socket_name, '\\')) |
8966b757 AS |
1193 | { |
1194 | /* socket_name is a file name component. */ | |
17107bb6 PE |
1195 | long uid = geteuid (); |
1196 | ptrdiff_t tmpdirlen; | |
6b0c8984 | 1197 | use_tmpdir = 1; |
f77b11a0 JB |
1198 | tmpdir = egetenv ("TMPDIR"); |
1199 | if (!tmpdir) | |
b336bfcd GM |
1200 | { |
1201 | #ifdef DARWIN_OS | |
e6068ab3 YM |
1202 | #ifndef _CS_DARWIN_USER_TEMP_DIR |
1203 | #define _CS_DARWIN_USER_TEMP_DIR 65537 | |
1204 | #endif | |
b336bfcd GM |
1205 | size_t n = confstr (_CS_DARWIN_USER_TEMP_DIR, NULL, (size_t) 0); |
1206 | if (n > 0) | |
1207 | { | |
17107bb6 | 1208 | tmpdir = tmpdir_storage = xmalloc (n); |
dd1ff7c0 | 1209 | confstr (_CS_DARWIN_USER_TEMP_DIR, tmpdir_storage, n); |
b336bfcd GM |
1210 | } |
1211 | else | |
1212 | #endif | |
1213 | tmpdir = "/tmp"; | |
1214 | } | |
17107bb6 | 1215 | tmpdirlen = strlen (tmpdir); |
6b0c8984 | 1216 | socket_name_storage = |
17107bb6 | 1217 | xmalloc (tmpdirlen + strlen (server_name) + EXTRA_SPACE); |
6b0c8984 AS |
1218 | strcpy (socket_name_storage, tmpdir); |
1219 | sprintf (socket_name_storage + tmpdirlen, "/emacs%ld/", uid); | |
1220 | strcat (socket_name_storage + tmpdirlen, server_name); | |
1221 | local_socket_name = socket_name_storage; | |
254107e4 RS |
1222 | } |
1223 | ||
6b0c8984 AS |
1224 | if (strlen (local_socket_name) < sizeof (server.sun_path)) |
1225 | strcpy (server.sun_path, local_socket_name); | |
254107e4 | 1226 | else |
819b8f00 | 1227 | { |
96c06863 | 1228 | message (true, "%s: socket-name %s too long\n", |
6b0c8984 | 1229 | progname, local_socket_name); |
819b8f00 KL |
1230 | fail (); |
1231 | } | |
efb859b4 | 1232 | |
9f637eea GM |
1233 | /* See if the socket exists, and if it's owned by us. */ |
1234 | sock_status = socket_status (server.sun_path); | |
152b6e83 | 1235 | saved_errno = errno; |
6b0c8984 | 1236 | if (sock_status && use_tmpdir) |
efb859b4 | 1237 | { |
9f637eea GM |
1238 | /* Failing that, see if LOGNAME or USER exist and differ from |
1239 | our euid. If so, look for a socket based on the UID | |
1240 | associated with the name. This is reminiscent of the logic | |
1241 | that init_editfns uses to set the global Vuser_full_name. */ | |
e69233c2 | 1242 | |
b9170155 | 1243 | const char *user_name = egetenv ("LOGNAME"); |
293f9f2a | 1244 | |
9f637eea | 1245 | if (!user_name) |
b9170155 | 1246 | user_name = egetenv ("USER"); |
e69233c2 | 1247 | |
9f637eea GM |
1248 | if (user_name) |
1249 | { | |
1250 | struct passwd *pw = getpwnam (user_name); | |
293f9f2a | 1251 | |
9f637eea GM |
1252 | if (pw && (pw->pw_uid != geteuid ())) |
1253 | { | |
1254 | /* We're running under su, apparently. */ | |
17107bb6 PE |
1255 | long uid = pw->pw_uid; |
1256 | ptrdiff_t tmpdirlen = strlen (tmpdir); | |
6b0c8984 AS |
1257 | char *user_socket_name |
1258 | = xmalloc (tmpdirlen + strlen (server_name) + EXTRA_SPACE); | |
1259 | strcpy (user_socket_name, tmpdir); | |
1260 | sprintf (user_socket_name + tmpdirlen, "/emacs%ld/", uid); | |
1261 | strcat (user_socket_name + tmpdirlen, server_name); | |
1262 | ||
1263 | if (strlen (user_socket_name) < sizeof (server.sun_path)) | |
1264 | strcpy (server.sun_path, user_socket_name); | |
5c9659d3 SM |
1265 | else |
1266 | { | |
96c06863 | 1267 | message (true, "%s: socket-name %s too long\n", |
6b0c8984 | 1268 | progname, user_socket_name); |
65396510 | 1269 | exit (EXIT_FAILURE); |
5c9659d3 | 1270 | } |
6b0c8984 | 1271 | free (user_socket_name); |
5c9659d3 | 1272 | |
9f637eea | 1273 | sock_status = socket_status (server.sun_path); |
b80bf66e | 1274 | saved_errno = errno; |
9f637eea | 1275 | } |
293f9f2a RS |
1276 | else |
1277 | errno = saved_errno; | |
9f637eea | 1278 | } |
efb859b4 | 1279 | } |
e69233c2 | 1280 | |
17107bb6 PE |
1281 | free (socket_name_storage); |
1282 | free (tmpdir_storage); | |
1283 | ||
aa0b6932 JB |
1284 | switch (sock_status) |
1285 | { | |
1286 | case 1: | |
974b73e8 KL |
1287 | /* There's a socket, but it isn't owned by us. This is OK if |
1288 | we are root. */ | |
1289 | if (0 != geteuid ()) | |
1290 | { | |
96c06863 | 1291 | message (true, "%s: Invalid socket owner\n", progname); |
aa0b6932 | 1292 | return INVALID_SOCKET; |
974b73e8 KL |
1293 | } |
1294 | break; | |
aa0b6932 JB |
1295 | |
1296 | case 2: | |
974b73e8 KL |
1297 | /* `stat' failed */ |
1298 | if (saved_errno == ENOENT) | |
96c06863 | 1299 | message (true, |
974b73e8 | 1300 | "%s: can't find socket; have you started the server?\n\ |
45adde32 | 1301 | To start the server in Emacs, type \"M-x server-start\".\n", |
aa0b6932 | 1302 | progname); |
974b73e8 | 1303 | else |
96c06863 | 1304 | message (true, "%s: can't stat %s: %s\n", |
aa0b6932 | 1305 | progname, server.sun_path, strerror (saved_errno)); |
974b73e8 | 1306 | return INVALID_SOCKET; |
aa0b6932 | 1307 | } |
efb859b4 | 1308 | } |
46cec291 | 1309 | |
4e23f2ba JB |
1310 | if (connect (s, (struct sockaddr *) &server, strlen (server.sun_path) + 2) |
1311 | < 0) | |
46cec291 | 1312 | { |
96c06863 | 1313 | message (true, "%s: connect: %s\n", progname, strerror (errno)); |
aa0b6932 | 1314 | return INVALID_SOCKET; |
46cec291 | 1315 | } |
23a7488d | 1316 | |
aa0b6932 JB |
1317 | return s; |
1318 | } | |
1319 | #endif /* ! NO_SOCKETS_IN_FILE_SYSTEM */ | |
1320 | ||
b23b5a5b | 1321 | static HSOCKET |
636b507b | 1322 | set_socket (int no_exit_if_error) |
aa0b6932 | 1323 | { |
b03d27bd | 1324 | HSOCKET s; |
6b0c8984 | 1325 | const char *local_server_file = server_file; |
c0f342ab | 1326 | |
b03d27bd | 1327 | INITIALIZE (); |
c0f342ab | 1328 | |
aa0b6932 | 1329 | #ifndef NO_SOCKETS_IN_FILE_SYSTEM |
b03d27bd JB |
1330 | /* Explicit --socket-name argument. */ |
1331 | if (socket_name) | |
46cec291 | 1332 | { |
6b0c8984 | 1333 | s = set_local_socket (socket_name); |
636b507b | 1334 | if ((s != INVALID_SOCKET) || no_exit_if_error) |
974b73e8 | 1335 | return s; |
96c06863 | 1336 | message (true, "%s: error accessing socket \"%s\"\n", |
974b73e8 | 1337 | progname, socket_name); |
b03d27bd | 1338 | exit (EXIT_FAILURE); |
46cec291 | 1339 | } |
b03d27bd JB |
1340 | #endif |
1341 | ||
1342 | /* Explicit --server-file arg or EMACS_SERVER_FILE variable. */ | |
6b0c8984 AS |
1343 | if (!local_server_file) |
1344 | local_server_file = egetenv ("EMACS_SERVER_FILE"); | |
46cec291 | 1345 | |
6b0c8984 | 1346 | if (local_server_file) |
23a7488d | 1347 | { |
6b0c8984 | 1348 | s = set_tcp_socket (local_server_file); |
636b507b | 1349 | if ((s != INVALID_SOCKET) || no_exit_if_error) |
974b73e8 | 1350 | return s; |
c0f342ab | 1351 | |
96c06863 | 1352 | message (true, "%s: error accessing server file \"%s\"\n", |
6b0c8984 | 1353 | progname, local_server_file); |
b03d27bd | 1354 | exit (EXIT_FAILURE); |
23a7488d | 1355 | } |
c0f342ab | 1356 | |
b03d27bd JB |
1357 | #ifndef NO_SOCKETS_IN_FILE_SYSTEM |
1358 | /* Implicit local socket. */ | |
6b0c8984 | 1359 | s = set_local_socket ("server"); |
b03d27bd JB |
1360 | if (s != INVALID_SOCKET) |
1361 | return s; | |
1362 | #endif | |
23a7488d | 1363 | |
b03d27bd | 1364 | /* Implicit server file. */ |
6b0c8984 | 1365 | s = set_tcp_socket ("server"); |
636b507b | 1366 | if ((s != INVALID_SOCKET) || no_exit_if_error) |
b03d27bd JB |
1367 | return s; |
1368 | ||
1369 | /* No implicit or explicit socket, and no alternate editor. */ | |
96c06863 | 1370 | message (true, "%s: No socket or alternate editor. Please use:\n\n" |
b03d27bd JB |
1371 | #ifndef NO_SOCKETS_IN_FILE_SYSTEM |
1372 | "\t--socket-name\n" | |
ee6a193c | 1373 | #endif |
b03d27bd JB |
1374 | "\t--server-file (or environment variable EMACS_SERVER_FILE)\n\ |
1375 | \t--alternate-editor (or environment variable ALTERNATE_EDITOR)\n", | |
1376 | progname); | |
1377 | exit (EXIT_FAILURE); | |
aa0b6932 | 1378 | } |
46cec291 | 1379 | |
5e0944c6 | 1380 | #ifdef HAVE_NTGUI |
0e0dced5 JB |
1381 | FARPROC set_fg; /* Pointer to AllowSetForegroundWindow. */ |
1382 | FARPROC get_wc; /* Pointer to RealGetWindowClassA. */ | |
1383 | ||
5e0944c6 DC |
1384 | void |
1385 | w32_set_user_model_id (void) | |
1386 | { | |
1387 | HMODULE shell; | |
1388 | HRESULT (WINAPI * set_user_model) (wchar_t * id); | |
1389 | ||
1390 | /* On Windows 7 and later, we need to set the user model ID | |
1391 | to associate emacsclient launched files with Emacs frames | |
1392 | in the UI. */ | |
1393 | shell = LoadLibrary ("shell32.dll"); | |
1394 | if (shell) | |
1395 | { | |
1396 | set_user_model | |
1397 | = (void *) GetProcAddress (shell, | |
1398 | "SetCurrentProcessExplicitAppUserModelID"); | |
1399 | /* If the function is defined, then we are running on Windows 7 | |
1400 | or newer, and the UI uses this to group related windows | |
1401 | together. Since emacs, runemacs, emacsclient are related, we | |
1402 | want them grouped even though the executables are different, | |
1403 | so we need to set a consistent ID between them. */ | |
1404 | if (set_user_model) | |
1405 | set_user_model (L"GNU.Emacs"); | |
1406 | ||
1407 | FreeLibrary (shell); | |
1408 | } | |
1409 | } | |
1410 | ||
0e0dced5 | 1411 | BOOL CALLBACK |
7c3320d8 | 1412 | w32_find_emacs_process (HWND hWnd, LPARAM lParam) |
0e0dced5 JB |
1413 | { |
1414 | DWORD pid; | |
1415 | char class[6]; | |
1416 | ||
1417 | /* Reject any window not of class "Emacs". */ | |
1418 | if (! get_wc (hWnd, class, sizeof (class)) | |
1419 | || strcmp (class, "Emacs")) | |
1420 | return TRUE; | |
1421 | ||
1422 | /* We only need the process id, not the thread id. */ | |
1423 | (void) GetWindowThreadProcessId (hWnd, &pid); | |
1424 | ||
1425 | /* Not the one we're looking for. */ | |
1426 | if (pid != (DWORD) emacs_pid) return TRUE; | |
1427 | ||
1428 | /* OK, let's raise it. */ | |
1429 | set_fg (emacs_pid); | |
1430 | ||
1431 | /* Stop enumeration. */ | |
1432 | return FALSE; | |
1433 | } | |
1434 | ||
79432772 JB |
1435 | /* Search for a window of class "Emacs" and owned by a process with |
1436 | process id = emacs_pid. If found, allow it to grab the focus. */ | |
1437 | ||
0e0dced5 | 1438 | void |
7c3320d8 | 1439 | w32_give_focus (void) |
0e0dced5 | 1440 | { |
ff90fbde | 1441 | HANDLE user32; |
0e0dced5 | 1442 | |
71b8f735 | 1443 | /* It shouldn't happen when dealing with TCP sockets. */ |
0e0dced5 JB |
1444 | if (!emacs_pid) return; |
1445 | ||
ff90fbde JR |
1446 | user32 = GetModuleHandle ("user32.dll"); |
1447 | ||
1448 | if (!user32) | |
1449 | return; | |
0e0dced5 JB |
1450 | |
1451 | /* Modern Windows restrict which processes can set the foreground window. | |
1452 | emacsclient can allow Emacs to grab the focus by calling the function | |
1453 | AllowSetForegroundWindow. Unfortunately, older Windows (W95, W98 and | |
1454 | NT) lack this function, so we have to check its availability. */ | |
ff90fbde JR |
1455 | if ((set_fg = GetProcAddress (user32, "AllowSetForegroundWindow")) |
1456 | && (get_wc = GetProcAddress (user32, "RealGetWindowClassA"))) | |
0e0dced5 | 1457 | EnumWindows (w32_find_emacs_process, (LPARAM) 0); |
0e0dced5 | 1458 | } |
5e0944c6 | 1459 | #endif /* HAVE_NTGUI */ |
0e0dced5 | 1460 | |
636b507b DN |
1461 | /* Start the emacs daemon and try to connect to it. */ |
1462 | ||
b23b5a5b | 1463 | static void |
636b507b DN |
1464 | start_daemon_and_retry_set_socket (void) |
1465 | { | |
802bdb3c | 1466 | #ifndef WINDOWSNT |
636b507b DN |
1467 | pid_t dpid; |
1468 | int status; | |
636b507b DN |
1469 | |
1470 | dpid = fork (); | |
1471 | ||
1472 | if (dpid > 0) | |
1473 | { | |
fd95644b DN |
1474 | pid_t w; |
1475 | w = waitpid (dpid, &status, WUNTRACED | WCONTINUED); | |
636b507b | 1476 | |
361358ea | 1477 | if ((w == -1) || !WIFEXITED (status) || WEXITSTATUS (status)) |
fd95644b | 1478 | { |
96c06863 | 1479 | message (true, "Error: Could not start the Emacs daemon\n"); |
fd95644b DN |
1480 | exit (EXIT_FAILURE); |
1481 | } | |
1482 | ||
1483 | /* Try connecting, the daemon should have started by now. */ | |
96c06863 | 1484 | message (true, "Emacs daemon should have started, trying to connect again\n"); |
636b507b | 1485 | if ((emacs_socket = set_socket (1)) == INVALID_SOCKET) |
fd95644b | 1486 | { |
96c06863 | 1487 | message (true, "Error: Cannot connect even after starting the Emacs daemon\n"); |
fd95644b DN |
1488 | exit (EXIT_FAILURE); |
1489 | } | |
636b507b DN |
1490 | } |
1491 | else if (dpid < 0) | |
1492 | { | |
fd95644b | 1493 | fprintf (stderr, "Error: Cannot fork!\n"); |
6ab88e02 | 1494 | exit (EXIT_FAILURE); |
636b507b DN |
1495 | } |
1496 | else | |
1497 | { | |
988e88ab | 1498 | char emacs[] = "emacs"; |
b0bbc07d | 1499 | char daemon_option[] = "--daemon"; |
29abe551 PE |
1500 | char *d_argv[3]; |
1501 | d_argv[0] = emacs; | |
1502 | d_argv[1] = daemon_option; | |
1503 | d_argv[2] = 0; | |
636b507b DN |
1504 | if (socket_name != NULL) |
1505 | { | |
1506 | /* Pass --daemon=socket_name as argument. */ | |
988e88ab | 1507 | const char *deq = "--daemon="; |
17107bb6 PE |
1508 | char *daemon_arg = xmalloc (strlen (deq) |
1509 | + strlen (socket_name) + 1); | |
636b507b DN |
1510 | strcpy (daemon_arg, deq); |
1511 | strcat (daemon_arg, socket_name); | |
1512 | d_argv[1] = daemon_arg; | |
1513 | } | |
1514 | execvp ("emacs", d_argv); | |
96c06863 | 1515 | message (true, "%s: error starting emacs daemon\n", progname); |
636b507b | 1516 | } |
802bdb3c | 1517 | #endif /* WINDOWSNT */ |
636b507b DN |
1518 | } |
1519 | ||
aa0b6932 | 1520 | int |
873fbd0b | 1521 | main (int argc, char **argv) |
aa0b6932 | 1522 | { |
c5443aa5 | 1523 | int rl = 0, needlf = 0; |
974b73e8 | 1524 | char *cwd, *str; |
aa0b6932 | 1525 | char string[BUFSIZ+1]; |
4be3dfc5 | 1526 | int start_daemon_if_needed; |
3ecb8d93 | 1527 | int exit_status = EXIT_SUCCESS; |
aa0b6932 | 1528 | |
974b73e8 | 1529 | main_argv = argv; |
aa0b6932 JB |
1530 | progname = argv[0]; |
1531 | ||
5e0944c6 | 1532 | #ifdef HAVE_NTGUI |
6b59694e DC |
1533 | /* On Windows 7 and later, we need to explicitly associate |
1534 | emacsclient with emacs so the UI behaves sensibly. This | |
1535 | association does no harm if we're not actually connecting to an | |
1536 | Emacs using a window display. */ | |
ff90fbde | 1537 | w32_set_user_model_id (); |
5e0944c6 | 1538 | #endif /* HAVE_NTGUI */ |
ff90fbde | 1539 | |
aa0b6932 JB |
1540 | /* Process options. */ |
1541 | decode_options (argc, argv); | |
1542 | ||
273b9028 | 1543 | if ((argc - optind < 1) && !eval && current_frame) |
23a7488d | 1544 | { |
96c06863 | 1545 | message (true, "%s: file name or argument required\n" |
974b73e8 KL |
1546 | "Try `%s --help' for more information\n", |
1547 | progname, progname); | |
aa0b6932 | 1548 | exit (EXIT_FAILURE); |
23a7488d RS |
1549 | } |
1550 | ||
f11352e6 | 1551 | #ifndef WINDOWSNT |
d050de75 PE |
1552 | if (tty) |
1553 | { | |
1554 | pid_t pgrp = getpgrp (); | |
1555 | pid_t tcpgrp = tcgetpgrp (1); | |
1556 | if (0 <= tcpgrp && tcpgrp != pgrp) | |
1557 | kill (-pgrp, SIGTTIN); | |
1558 | } | |
f11352e6 | 1559 | #endif /* !WINDOWSNT */ |
d050de75 | 1560 | |
636b507b DN |
1561 | /* If alternate_editor is the empty string, start the emacs daemon |
1562 | in case of failure to connect. */ | |
1563 | start_daemon_if_needed = (alternate_editor | |
1564 | && (alternate_editor[0] == '\0')); | |
aa0b6932 | 1565 | |
7e6bb4c9 PE |
1566 | emacs_socket = set_socket (alternate_editor || start_daemon_if_needed); |
1567 | if (emacs_socket == INVALID_SOCKET) | |
1568 | { | |
1569 | if (! start_daemon_if_needed) | |
1570 | fail (); | |
1571 | ||
7e6bb4c9 PE |
1572 | start_daemon_and_retry_set_socket (); |
1573 | } | |
974b73e8 KL |
1574 | |
1575 | cwd = get_current_dir_name (); | |
46cec291 RS |
1576 | if (cwd == 0) |
1577 | { | |
96c06863 | 1578 | message (true, "%s: %s\n", progname, |
974b73e8 | 1579 | "Cannot get current working directory"); |
819b8f00 | 1580 | fail (); |
46cec291 RS |
1581 | } |
1582 | ||
5e0944c6 | 1583 | #ifdef HAVE_NTGUI |
efc3dd3c | 1584 | if (display && !strcmp (display, "w32")) |
0e0dced5 | 1585 | w32_give_focus (); |
5e0944c6 | 1586 | #endif /* HAVE_NTGUI */ |
c66648e0 | 1587 | |
273b9028 | 1588 | /* Send over our environment and current directory. */ |
59e085e0 KL |
1589 | if (!current_frame) |
1590 | { | |
59e085e0 KL |
1591 | int i; |
1592 | for (i = 0; environ[i]; i++) | |
1593 | { | |
486ba65f JR |
1594 | send_to_emacs (emacs_socket, "-env "); |
1595 | quote_argument (emacs_socket, environ[i]); | |
1596 | send_to_emacs (emacs_socket, " "); | |
59e085e0 | 1597 | } |
2828d5f9 | 1598 | } |
ba528748 SM |
1599 | send_to_emacs (emacs_socket, "-dir "); |
1600 | quote_argument (emacs_socket, cwd); | |
1601 | send_to_emacs (emacs_socket, "/"); | |
1602 | send_to_emacs (emacs_socket, " "); | |
2828d5f9 | 1603 | |
6afdd335 | 1604 | retry: |
5212210c | 1605 | if (nowait) |
486ba65f | 1606 | send_to_emacs (emacs_socket, "-nowait "); |
292d74a3 | 1607 | |
92071250 | 1608 | if (current_frame) |
486ba65f | 1609 | send_to_emacs (emacs_socket, "-current-frame "); |
c0f342ab | 1610 | |
30be2360 | 1611 | if (display) |
87209357 | 1612 | { |
486ba65f JR |
1613 | send_to_emacs (emacs_socket, "-display "); |
1614 | quote_argument (emacs_socket, display); | |
1615 | send_to_emacs (emacs_socket, " "); | |
87209357 | 1616 | } |
30be2360 | 1617 | |
0191e222 CY |
1618 | if (parent_id) |
1619 | { | |
1620 | send_to_emacs (emacs_socket, "-parent-id "); | |
1621 | quote_argument (emacs_socket, parent_id); | |
1622 | send_to_emacs (emacs_socket, " "); | |
1623 | } | |
1624 | ||
18a4ce5e AR |
1625 | if (frame_parameters && !current_frame) |
1626 | { | |
1627 | send_to_emacs (emacs_socket, "-frame-parameters "); | |
1628 | quote_argument (emacs_socket, frame_parameters); | |
1629 | send_to_emacs (emacs_socket, " "); | |
1630 | } | |
1631 | ||
2d0e8e61 CY |
1632 | /* Unless we are certain we don't want to occupy the tty, send our |
1633 | tty information to Emacs. For example, in daemon mode Emacs may | |
1634 | need to occupy this tty if no other frame is available. */ | |
1635 | if (!current_frame || !eval) | |
9628b887 | 1636 | { |
b9170155 | 1637 | const char *tty_type, *tty_name; |
0b0d3e0b | 1638 | |
273b9028 CY |
1639 | if (find_tty (&tty_type, &tty_name, !tty)) |
1640 | { | |
b2ff54a0 | 1641 | #if !defined (NO_SOCKETS_IN_FILE_SYSTEM) |
273b9028 | 1642 | init_signals (); |
b2ff54a0 | 1643 | #endif |
273b9028 CY |
1644 | send_to_emacs (emacs_socket, "-tty "); |
1645 | quote_argument (emacs_socket, tty_name); | |
1646 | send_to_emacs (emacs_socket, " "); | |
1647 | quote_argument (emacs_socket, tty_type); | |
1648 | send_to_emacs (emacs_socket, " "); | |
1649 | } | |
9628b887 | 1650 | } |
77134727 | 1651 | |
273b9028 | 1652 | if (!current_frame && !tty) |
486ba65f | 1653 | send_to_emacs (emacs_socket, "-window-system "); |
0b0d3e0b | 1654 | |
87209357 | 1655 | if ((argc - optind > 0)) |
5212210c | 1656 | { |
b0bbc07d | 1657 | int i; |
87209357 | 1658 | for (i = optind; i < argc; i++) |
46cec291 | 1659 | { |
0b0d3e0b | 1660 | |
87209357 | 1661 | if (eval) |
0b0d3e0b | 1662 | { |
974b73e8 | 1663 | /* Don't prepend cwd or anything like that. */ |
486ba65f JR |
1664 | send_to_emacs (emacs_socket, "-eval "); |
1665 | quote_argument (emacs_socket, argv[i]); | |
1666 | send_to_emacs (emacs_socket, " "); | |
0b0d3e0b KL |
1667 | continue; |
1668 | } | |
1669 | ||
1670 | if (*argv[i] == '+') | |
1671 | { | |
87209357 EZ |
1672 | char *p = argv[i] + 1; |
1673 | while (isdigit ((unsigned char) *p) || *p == ':') p++; | |
0b0d3e0b KL |
1674 | if (*p == 0) |
1675 | { | |
486ba65f JR |
1676 | send_to_emacs (emacs_socket, "-position "); |
1677 | quote_argument (emacs_socket, argv[i]); | |
1678 | send_to_emacs (emacs_socket, " "); | |
0b0d3e0b KL |
1679 | continue; |
1680 | } | |
0b0d3e0b | 1681 | } |
6cde1b21 JB |
1682 | #ifdef WINDOWSNT |
1683 | else if (! file_name_absolute_p (argv[i]) | |
1684 | && (isalpha (argv[i][0]) && argv[i][1] == ':')) | |
1685 | /* Windows can have a different default directory for each | |
1686 | drive, so the cwd passed via "-dir" is not sufficient | |
1687 | to account for that. | |
1688 | If the user uses <drive>:<relpath>, we hence need to be | |
1689 | careful to expand <relpath> with the default directory | |
1690 | corresponding to <drive>. */ | |
1691 | { | |
1692 | char *filename = (char *) xmalloc (MAX_PATH); | |
1693 | DWORD size; | |
1694 | ||
1695 | size = GetFullPathName (argv[i], MAX_PATH, filename, NULL); | |
1696 | if (size > 0 && size < MAX_PATH) | |
1697 | argv[i] = filename; | |
1698 | else | |
1699 | free (filename); | |
1700 | } | |
1701 | #endif | |
0b0d3e0b | 1702 | |
486ba65f | 1703 | send_to_emacs (emacs_socket, "-file "); |
486ba65f JR |
1704 | quote_argument (emacs_socket, argv[i]); |
1705 | send_to_emacs (emacs_socket, " "); | |
0b0d3e0b | 1706 | } |
46cec291 | 1707 | } |
273b9028 | 1708 | else if (eval) |
87209357 | 1709 | { |
273b9028 CY |
1710 | /* Read expressions interactively. */ |
1711 | while ((str = fgets (string, BUFSIZ, stdin))) | |
1712 | { | |
1713 | send_to_emacs (emacs_socket, "-eval "); | |
1714 | quote_argument (emacs_socket, str); | |
1715 | } | |
1716 | send_to_emacs (emacs_socket, " "); | |
87209357 | 1717 | } |
0b0d3e0b | 1718 | |
486ba65f | 1719 | send_to_emacs (emacs_socket, "\n"); |
46cec291 | 1720 | |
fc2040c0 | 1721 | /* Wait for an answer. */ |
0b973fc5 | 1722 | if (!eval && !tty && !nowait && !quiet) |
30be2360 SM |
1723 | { |
1724 | printf ("Waiting for Emacs..."); | |
1725 | needlf = 2; | |
1726 | } | |
46cec291 | 1727 | fflush (stdout); |
47d7532e PE |
1728 | while (fdatasync (1) != 0 && errno == EINTR) |
1729 | continue; | |
46cec291 | 1730 | |
3cf8c6aa | 1731 | /* Now, wait for an answer and print any messages. */ |
b166dcd8 | 1732 | while (exit_status == EXIT_SUCCESS) |
3cf8c6aa | 1733 | { |
2b84f674 | 1734 | char *p, *end_p; |
b166dcd8 KC |
1735 | do |
1736 | { | |
1737 | errno = 0; | |
1738 | rl = recv (emacs_socket, string, BUFSIZ, 0); | |
1739 | } | |
1740 | /* If we receive a signal (e.g. SIGWINCH, which we pass | |
1741 | through to Emacs), on some OSes we get EINTR and must retry. */ | |
1742 | while (rl < 0 && errno == EINTR); | |
1743 | ||
1744 | if (rl <= 0) | |
1745 | break; | |
b23b5a5b | 1746 | |
974b73e8 KL |
1747 | string[rl] = '\0'; |
1748 | ||
2b84f674 AS |
1749 | /* Loop over all NL-terminated messages. */ |
1750 | for (end_p = p = string; end_p != NULL && *end_p != '\0'; p = end_p) | |
1751 | { | |
1752 | end_p = strchr (p, '\n'); | |
1753 | if (end_p != NULL) | |
1754 | *end_p++ = '\0'; | |
0b0d3e0b | 1755 | |
6b59694e DC |
1756 | if (strprefix ("-emacs-pid ", p)) |
1757 | { | |
1758 | /* -emacs-pid PID: The process id of the Emacs process. */ | |
1759 | emacs_pid = strtol (p + strlen ("-emacs-pid"), NULL, 10); | |
1760 | } | |
1761 | else if (strprefix ("-window-system-unsupported ", p)) | |
1762 | { | |
1763 | /* -window-system-unsupported: Emacs was compiled without support | |
1764 | for whatever window system we tried. Try the alternate | |
1765 | display, or, failing that, try the terminal. */ | |
1766 | if (alt_display) | |
1767 | { | |
1768 | display = alt_display; | |
1769 | alt_display = NULL; | |
1770 | } | |
1771 | else | |
1772 | { | |
1773 | nowait = 0; | |
1774 | tty = 1; | |
1775 | } | |
1776 | ||
1777 | goto retry; | |
1778 | } | |
1779 | else if (strprefix ("-print ", p)) | |
1780 | { | |
1781 | /* -print STRING: Print STRING on the terminal. */ | |
1782 | str = unquote_argument (p + strlen ("-print ")); | |
1783 | if (needlf) | |
1784 | printf ("\n"); | |
1785 | printf ("%s", str); | |
1786 | needlf = str[0] == '\0' ? needlf : str[strlen (str) - 1] != '\n'; | |
1787 | } | |
1788 | else if (strprefix ("-print-nonl ", p)) | |
1789 | { | |
1790 | /* -print-nonl STRING: Print STRING on the terminal. | |
1791 | Used to continue a preceding -print command. */ | |
1792 | str = unquote_argument (p + strlen ("-print-nonl ")); | |
1793 | printf ("%s", str); | |
1794 | needlf = str[0] == '\0' ? needlf : str[strlen (str) - 1] != '\n'; | |
1795 | } | |
1796 | else if (strprefix ("-error ", p)) | |
1797 | { | |
1798 | /* -error DESCRIPTION: Signal an error on the terminal. */ | |
1799 | str = unquote_argument (p + strlen ("-error ")); | |
1800 | if (needlf) | |
1801 | printf ("\n"); | |
1802 | fprintf (stderr, "*ERROR*: %s", str); | |
1803 | needlf = str[0] == '\0' ? needlf : str[strlen (str) - 1] != '\n'; | |
1804 | exit_status = EXIT_FAILURE; | |
1805 | } | |
c801ad51 | 1806 | #ifdef SIGSTOP |
2b84f674 AS |
1807 | else if (strprefix ("-suspend ", p)) |
1808 | { | |
1809 | /* -suspend: Suspend this terminal, i.e., stop the process. */ | |
1810 | if (needlf) | |
1811 | printf ("\n"); | |
1812 | needlf = 0; | |
1813 | kill (0, SIGSTOP); | |
1814 | } | |
b2ff54a0 | 1815 | #endif |
2b84f674 AS |
1816 | else |
1817 | { | |
1818 | /* Unknown command. */ | |
1819 | if (needlf) | |
1820 | printf ("\n"); | |
1821 | needlf = 0; | |
1822 | printf ("*ERROR*: Unknown message: %s\n", p); | |
1823 | } | |
1824 | } | |
3cf8c6aa SM |
1825 | } |
1826 | ||
1827 | if (needlf) | |
1828 | printf ("\n"); | |
1829 | fflush (stdout); | |
47d7532e PE |
1830 | while (fdatasync (1) != 0 && errno == EINTR) |
1831 | continue; | |
23a7488d | 1832 | |
3ecb8d93 WS |
1833 | if (rl < 0) |
1834 | exit_status = EXIT_FAILURE; | |
1835 | ||
4b7b77f6 | 1836 | CLOSE_SOCKET (emacs_socket); |
3ecb8d93 | 1837 | return exit_status; |
46cec291 RS |
1838 | } |
1839 | ||
1e7823d0 | 1840 | #endif /* HAVE_SOCKETS && HAVE_INET_SOCKETS */ |