Commit | Line | Data |
---|---|---|
efb859b4 | 1 | /* Client process that communicates with GNU Emacs acting as server. |
92b47a4a | 2 | Copyright (C) 1986, 1987, 1994, 1999, 2000, 2001, 2002, 2003, 2004, |
273dc16a | 3 | 2005, 2006 Free Software Foundation, Inc. |
46cec291 RS |
4 | |
5 | This file is part of GNU Emacs. | |
6 | ||
7 | GNU Emacs is free software; you can redistribute it and/or modify | |
8 | it under the terms of the GNU General Public License as published by | |
92af894f | 9 | the Free Software Foundation; either version 2, or (at your option) |
46cec291 RS |
10 | any later version. |
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 | |
18 | along with GNU Emacs; see the file COPYING. If not, write to | |
364c38d3 LK |
19 | the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, |
20 | Boston, MA 02110-1301, USA. */ | |
46cec291 RS |
21 | |
22 | ||
23 | #define NO_SHORTNAMES | |
e69233c2 PJ |
24 | |
25 | #ifdef HAVE_CONFIG_H | |
2f8fe2f4 | 26 | #include <config.h> |
e69233c2 PJ |
27 | #endif |
28 | ||
aa0b6932 | 29 | #ifdef WINDOWSNT |
aa0b6932 | 30 | |
bc28de71 JB |
31 | /* config.h defines these, which disables sockets altogether! */ |
32 | # undef _WINSOCKAPI_ | |
33 | # undef _WINSOCK_H | |
34 | ||
411b80a5 JB |
35 | # include <malloc.h> |
36 | # include <stdlib.h> | |
37 | ||
411b80a5 JB |
38 | # define NO_SOCKETS_IN_FILE_SYSTEM |
39 | ||
aa0b6932 JB |
40 | # define HSOCKET SOCKET |
41 | # define CLOSE_SOCKET closesocket | |
aa0b6932 | 42 | # define INITIALIZE() (initialize_sockets ()) |
411b80a5 JB |
43 | |
44 | #else /* !WINDOWSNT */ | |
45 | ||
ed4a3730 JB |
46 | # include <sys/types.h> |
47 | ||
1e7823d0 JB |
48 | # ifdef HAVE_INET_SOCKETS |
49 | # include <netinet/in.h> | |
50 | # endif | |
411b80a5 | 51 | |
e35fc962 | 52 | # define INVALID_SOCKET -1 |
aa0b6932 JB |
53 | # define HSOCKET int |
54 | # define CLOSE_SOCKET close | |
aa0b6932 | 55 | # define INITIALIZE() |
411b80a5 JB |
56 | |
57 | #endif /* !WINDOWSNT */ | |
aa0b6932 | 58 | |
4e23f2ba | 59 | #undef signal |
46cec291 | 60 | |
e69233c2 | 61 | #include <ctype.h> |
8f9aaa0a | 62 | #include <stdio.h> |
aa0b6932 | 63 | #include "getopt.h" |
79f13bba DL |
64 | #ifdef HAVE_UNISTD_H |
65 | #include <unistd.h> | |
66 | #endif | |
8f9aaa0a | 67 | |
9f637eea GM |
68 | #ifdef VMS |
69 | # include "vms-pwd.h" | |
aa0b6932 JB |
70 | #else /* not VMS */ |
71 | #ifdef WINDOWSNT | |
72 | # include <io.h> | |
73 | #else /* not WINDOWSNT */ | |
9f637eea | 74 | # include <pwd.h> |
aa0b6932 | 75 | #endif /* not WINDOWSNT */ |
9f637eea GM |
76 | #endif /* not VMS */ |
77 | ||
8f9aaa0a | 78 | char *getenv (), *getwd (); |
5b9562c3 | 79 | char *(getcwd) (); |
8f9aaa0a | 80 | |
8f9aaa0a RS |
81 | #ifndef VERSION |
82 | #define VERSION "unspecified" | |
83 | #endif | |
84 | \f | |
aa0b6932 JB |
85 | #define SEND_STRING(data) (send_to_emacs (s, (data))) |
86 | #define SEND_QUOTED(data) (quote_file_name (s, (data))) | |
87 | ||
88 | #ifndef EXIT_SUCCESS | |
89 | #define EXIT_SUCCESS 0 | |
90 | #endif | |
91 | ||
92 | #ifndef EXIT_FAILURE | |
93 | #define EXIT_FAILURE 1 | |
94 | #endif | |
95 | ||
96 | #ifndef FALSE | |
97 | #define FALSE 0 | |
98 | #endif | |
99 | ||
100 | #ifndef TRUE | |
101 | #define TRUE 1 | |
102 | #endif | |
103 | ||
104 | #ifndef NO_RETURN | |
105 | #define NO_RETURN | |
106 | #endif | |
107 | \f | |
8f9aaa0a RS |
108 | /* Name used to invoke this program. */ |
109 | char *progname; | |
110 | ||
749ae770 | 111 | /* Nonzero means don't wait for a response from Emacs. --no-wait. */ |
8f9aaa0a RS |
112 | int nowait = 0; |
113 | ||
30be2360 SM |
114 | /* Nonzero means args are expressions to be evaluated. --eval. */ |
115 | int eval = 0; | |
116 | ||
117 | /* The display on which Emacs should work. --display. */ | |
118 | char *display = NULL; | |
119 | ||
120 | /* If non-NULL, the name of an editor to fallback to if the server | |
121 | is not running. --alternate-editor. */ | |
b03d27bd | 122 | const char *alternate_editor = NULL; |
30be2360 | 123 | |
3db926be | 124 | /* If non-NULL, the filename of the UNIX socket. */ |
254107e4 RS |
125 | char *socket_name = NULL; |
126 | ||
aa0b6932 JB |
127 | /* If non-NULL, the filename of the authentication file. */ |
128 | char *server_file = NULL; | |
129 | ||
2381d38d | 130 | void print_help_and_exit () NO_RETURN; |
7f3bff3e | 131 | |
8f9aaa0a RS |
132 | struct option longopts[] = |
133 | { | |
749ae770 | 134 | { "no-wait", no_argument, NULL, 'n' }, |
30be2360 | 135 | { "eval", no_argument, NULL, 'e' }, |
8f9aaa0a RS |
136 | { "help", no_argument, NULL, 'H' }, |
137 | { "version", no_argument, NULL, 'V' }, | |
3cf8c6aa | 138 | { "alternate-editor", required_argument, NULL, 'a' }, |
b03d27bd | 139 | #ifndef NO_SOCKETS_IN_FILE_SYSTEM |
254107e4 | 140 | { "socket-name", required_argument, NULL, 's' }, |
b03d27bd | 141 | #endif |
aa0b6932 | 142 | { "server-file", required_argument, NULL, 'f' }, |
30be2360 SM |
143 | { "display", required_argument, NULL, 'd' }, |
144 | { 0, 0, 0, 0 } | |
8f9aaa0a RS |
145 | }; |
146 | ||
147 | /* Decode the options from argv and argc. | |
5212210c | 148 | The global variable `optind' will say how many arguments we used up. */ |
8f9aaa0a | 149 | |
5212210c | 150 | void |
8f9aaa0a RS |
151 | decode_options (argc, argv) |
152 | int argc; | |
153 | char **argv; | |
154 | { | |
b6b6d6d2 SM |
155 | alternate_editor = getenv ("ALTERNATE_EDITOR"); |
156 | ||
8f9aaa0a RS |
157 | while (1) |
158 | { | |
159 | int opt = getopt_long (argc, argv, | |
b03d27bd JB |
160 | #ifndef NO_SOCKETS_IN_FILE_SYSTEM |
161 | "VHnea:s:f:d:", | |
162 | #else | |
163 | "VHnea:f:d:", | |
164 | #endif | |
165 | longopts, 0); | |
8f9aaa0a RS |
166 | |
167 | if (opt == EOF) | |
168 | break; | |
169 | ||
170 | switch (opt) | |
171 | { | |
172 | case 0: | |
173 | /* If getopt returns 0, then it has already processed a | |
174 | long-named option. We should do nothing. */ | |
175 | break; | |
e69233c2 | 176 | |
97e3214d GM |
177 | case 'a': |
178 | alternate_editor = optarg; | |
179 | break; | |
e69233c2 | 180 | |
b03d27bd | 181 | #ifndef NO_SOCKETS_IN_FILE_SYSTEM |
254107e4 RS |
182 | case 's': |
183 | socket_name = optarg; | |
184 | break; | |
b03d27bd | 185 | #endif |
254107e4 | 186 | |
aa0b6932 JB |
187 | case 'f': |
188 | server_file = optarg; | |
189 | break; | |
190 | ||
30be2360 SM |
191 | case 'd': |
192 | display = optarg; | |
193 | break; | |
194 | ||
8f9aaa0a RS |
195 | case 'n': |
196 | nowait = 1; | |
197 | break; | |
198 | ||
30be2360 SM |
199 | case 'e': |
200 | eval = 1; | |
201 | break; | |
202 | ||
8f9aaa0a | 203 | case 'V': |
20c396e8 | 204 | printf ("emacsclient %s\n", VERSION); |
65396510 | 205 | exit (EXIT_SUCCESS); |
8f9aaa0a | 206 | break; |
46cec291 | 207 | |
8f9aaa0a | 208 | case 'H': |
8f9aaa0a | 209 | print_help_and_exit (); |
20c396e8 JB |
210 | break; |
211 | ||
212 | default: | |
213 | fprintf (stderr, "Try `%s --help' for more information\n", progname); | |
65396510 | 214 | exit (EXIT_FAILURE); |
20c396e8 | 215 | break; |
8f9aaa0a RS |
216 | } |
217 | } | |
8f9aaa0a RS |
218 | } |
219 | ||
7f3bff3e | 220 | void |
8f9aaa0a RS |
221 | print_help_and_exit () |
222 | { | |
20c396e8 JB |
223 | printf ( |
224 | "Usage: %s [OPTIONS] FILE...\n\ | |
30be2360 SM |
225 | Tell the Emacs server to visit the specified files.\n\ |
226 | Every FILE can be either just a FILENAME or [+LINE[:COLUMN]] FILENAME.\n\ | |
20c396e8 | 227 | \n\ |
30be2360 SM |
228 | The following OPTIONS are accepted:\n\ |
229 | -V, --version Just print a version info and return\n\ | |
230 | -H, --help Print this usage information message\n\ | |
231 | -n, --no-wait Don't wait for the server to return\n\ | |
232 | -e, --eval Evaluate the FILE arguments as ELisp expressions\n\ | |
aa0b6932 JB |
233 | -d, --display=DISPLAY Visit the file in the given display\n" |
234 | #ifndef NO_SOCKETS_IN_FILE_SYSTEM | |
235 | "-s, --socket-name=FILENAME\n\ | |
236 | Set the filename of the UNIX socket for communication\n" | |
237 | #endif | |
238 | "-f, --server-file=FILENAME\n\ | |
239 | Set the filename of the TCP configuration file\n\ | |
30be2360 SM |
240 | -a, --alternate-editor=EDITOR\n\ |
241 | Editor to fallback to if the server is not running\n\ | |
20c396e8 | 242 | \n\ |
30be2360 | 243 | Report bugs to bug-gnu-emacs@gnu.org.\n", progname); |
65396510 | 244 | exit (EXIT_SUCCESS); |
8f9aaa0a | 245 | } |
5212210c | 246 | |
aa0b6932 JB |
247 | \f |
248 | /* | |
249 | Try to run a different command, or --if no alternate editor is | |
250 | defined-- exit with an errorcode. | |
251 | */ | |
252 | void | |
253 | fail (argc, argv) | |
254 | int argc; | |
255 | char **argv; | |
256 | { | |
257 | if (alternate_editor) | |
258 | { | |
259 | int i = optind - 1; | |
b73ea44b JB |
260 | #ifdef WINDOWSNT |
261 | argv[i] = (char *)alternate_editor; | |
262 | #endif | |
aa0b6932 JB |
263 | execvp (alternate_editor, argv + i); |
264 | fprintf (stderr, "%s: error executing alternate editor \"%s\"\n", | |
265 | progname, alternate_editor); | |
266 | } | |
aa0b6932 JB |
267 | exit (EXIT_FAILURE); |
268 | } | |
269 | ||
270 | \f | |
1e7823d0 | 271 | #if !defined (HAVE_SOCKETS) || !defined (HAVE_INET_SOCKETS) |
aa0b6932 JB |
272 | |
273 | int | |
274 | main (argc, argv) | |
275 | int argc; | |
276 | char **argv; | |
277 | { | |
278 | fprintf (stderr, "%s: Sorry, the Emacs server is supported only\n", | |
279 | argv[0]); | |
280 | fprintf (stderr, "on systems with Berkeley sockets.\n"); | |
281 | ||
282 | fail (argc, argv); | |
283 | } | |
284 | ||
1e7823d0 | 285 | #else /* HAVE_SOCKETS && HAVE_INET_SOCKETS */ |
aa0b6932 JB |
286 | |
287 | #ifdef WINDOWSNT | |
288 | # include <winsock2.h> | |
289 | #else | |
290 | # include <sys/types.h> | |
291 | # include <sys/socket.h> | |
292 | # include <sys/un.h> | |
293 | # include <sys/stat.h> | |
294 | # include <errno.h> | |
295 | #endif | |
296 | ||
297 | #define AUTH_KEY_LENGTH 64 | |
298 | #define SEND_BUFFER_SIZE 4096 | |
299 | ||
300 | extern char *strerror (); | |
301 | extern int errno; | |
302 | ||
303 | /* Buffer to accumulate data to send in TCP connections. */ | |
304 | char send_buffer[SEND_BUFFER_SIZE + 1]; | |
305 | int sblen = 0; /* Fill pointer for the send buffer. */ | |
306 | ||
307 | /* Let's send the data to Emacs when either | |
308 | - the data ends in "\n", or | |
309 | - the buffer is full (but this shouldn't happen) | |
310 | Otherwise, we just accumulate it. */ | |
b03d27bd JB |
311 | void |
312 | send_to_emacs (s, data) | |
aa0b6932 JB |
313 | HSOCKET s; |
314 | char *data; | |
315 | { | |
316 | while (data) | |
317 | { | |
318 | int dlen = strlen (data); | |
319 | if (dlen + sblen >= SEND_BUFFER_SIZE) | |
320 | { | |
321 | int part = SEND_BUFFER_SIZE - sblen; | |
322 | strncpy (&send_buffer[sblen], data, part); | |
323 | data += part; | |
324 | sblen = SEND_BUFFER_SIZE; | |
325 | } | |
326 | else if (dlen) | |
327 | { | |
328 | strcpy (&send_buffer[sblen], data); | |
329 | data = NULL; | |
330 | sblen += dlen; | |
331 | } | |
332 | else | |
333 | break; | |
334 | ||
335 | if (sblen == SEND_BUFFER_SIZE | |
336 | || (sblen > 0 && send_buffer[sblen-1] == '\n')) | |
337 | { | |
338 | int sent = send (s, send_buffer, sblen, 0); | |
339 | if (sent != sblen) | |
340 | strcpy (send_buffer, &send_buffer[sent]); | |
341 | sblen -= sent; | |
342 | } | |
343 | } | |
344 | } | |
345 | ||
a4cf2096 RS |
346 | /* In NAME, insert a & before each &, each space, each newline, and |
347 | any initial -. Change spaces to underscores, too, so that the | |
5212210c | 348 | return value never contains a space. */ |
87209357 | 349 | void |
aa0b6932 JB |
350 | quote_file_name (s, name) |
351 | HSOCKET s; | |
5212210c RS |
352 | char *name; |
353 | { | |
354 | char *copy = (char *) malloc (strlen (name) * 2 + 1); | |
355 | char *p, *q; | |
356 | ||
357 | p = name; | |
358 | q = copy; | |
359 | while (*p) | |
360 | { | |
361 | if (*p == ' ') | |
362 | { | |
f1db6a73 | 363 | *q++ = '&'; |
5212210c RS |
364 | *q++ = '_'; |
365 | p++; | |
366 | } | |
3cf8c6aa SM |
367 | else if (*p == '\n') |
368 | { | |
369 | *q++ = '&'; | |
370 | *q++ = 'n'; | |
371 | p++; | |
372 | } | |
5212210c RS |
373 | else |
374 | { | |
f1db6a73 RS |
375 | if (*p == '&' || (*p == '-' && p == name)) |
376 | *q++ = '&'; | |
5212210c RS |
377 | *q++ = *p++; |
378 | } | |
379 | } | |
f1db6a73 | 380 | *q++ = 0; |
5212210c | 381 | |
aa0b6932 | 382 | SEND_STRING (copy); |
87209357 EZ |
383 | |
384 | free (copy); | |
5212210c | 385 | } |
0c76956f | 386 | |
b03d27bd JB |
387 | int |
388 | file_name_absolute_p (filename) | |
389 | const unsigned char *filename; | |
390 | { | |
391 | /* Sanity check, it shouldn't happen. */ | |
392 | if (! filename) return FALSE; | |
393 | ||
394 | /* /xxx is always an absolute path. */ | |
395 | if (filename[0] == '/') return TRUE; | |
396 | ||
397 | /* Empty filenames (which shouldn't happen) are relative. */ | |
398 | if (filename[0] == '\0') return FALSE; | |
399 | ||
400 | #ifdef WINDOWSNT | |
401 | /* X:\xxx is always absolute; X:xxx is an error and will fail. */ | |
402 | if (islower (tolower (filename[0])) | |
403 | && filename[1] == ':' && filename[2] == '\\') | |
404 | return TRUE; | |
405 | ||
406 | /* Both \xxx and \\xxx\yyy are absolute. */ | |
407 | if (filename[0] == '\\') return TRUE; | |
408 | #endif | |
409 | ||
410 | return FALSE; | |
411 | } | |
412 | ||
aa0b6932 JB |
413 | #ifdef WINDOWSNT |
414 | /* Wrapper to make WSACleanup a cdecl, as required by atexit(). */ | |
b03d27bd JB |
415 | void |
416 | __cdecl close_winsock () | |
aa0b6932 JB |
417 | { |
418 | WSACleanup (); | |
419 | } | |
0c76956f | 420 | |
b03d27bd JB |
421 | /* Initialize the WinSock2 library. */ |
422 | void | |
423 | initialize_sockets () | |
0c76956f | 424 | { |
aa0b6932 JB |
425 | WSADATA wsaData; |
426 | ||
aa0b6932 JB |
427 | if (WSAStartup (MAKEWORD (2, 0), &wsaData)) |
428 | { | |
429 | fprintf (stderr, "%s: error initializing WinSock2", progname); | |
430 | exit (EXIT_FAILURE); | |
431 | } | |
432 | ||
433 | atexit (close_winsock); | |
0c76956f | 434 | } |
e35fc962 | 435 | #endif /* WINDOWSNT */ |
8f9aaa0a | 436 | \f |
97e3214d | 437 | /* |
aa0b6932 | 438 | * Read the information needed to set up a TCP comm channel with |
434a6c5d | 439 | * the Emacs server: host, port, pid and authentication string. |
97e3214d | 440 | */ |
b03d27bd JB |
441 | int |
442 | get_server_config (server, authentication) | |
aa0b6932 JB |
443 | struct sockaddr_in *server; |
444 | char *authentication; | |
97e3214d | 445 | { |
aa0b6932 JB |
446 | char dotted[32]; |
447 | char *port; | |
434a6c5d | 448 | char *pid; |
b03d27bd | 449 | FILE *config = NULL; |
aa0b6932 | 450 | |
b03d27bd JB |
451 | if (file_name_absolute_p (server_file)) |
452 | config = fopen (server_file, "rb"); | |
453 | else | |
97e3214d | 454 | { |
aa0b6932 | 455 | char *home = getenv ("HOME"); |
88b46d84 | 456 | |
aa0b6932 JB |
457 | if (home) |
458 | { | |
459 | char *path = alloca (32 + strlen (home) + strlen (server_file)); | |
460 | sprintf (path, "%s/.emacs.d/server/%s", home, server_file); | |
461 | config = fopen (path, "rb"); | |
462 | } | |
88b46d84 JB |
463 | #ifdef WINDOWSNT |
464 | if (!config && (home = getenv ("APPDATA"))) | |
465 | { | |
466 | char *path = alloca (32 + strlen (home) + strlen (server_file)); | |
467 | sprintf (path, "%s/.emacs.d/server/%s", home, server_file); | |
468 | config = fopen (path, "rb"); | |
469 | } | |
470 | #endif | |
aa0b6932 JB |
471 | } |
472 | ||
473 | if (! config) | |
474 | return FALSE; | |
475 | ||
476 | if (fgets (dotted, sizeof dotted, config) | |
434a6c5d JB |
477 | && (port = strchr (dotted, ':')) |
478 | && (pid = strchr (port, ' '))) | |
aa0b6932 JB |
479 | { |
480 | *port++ = '\0'; | |
434a6c5d | 481 | *pid++ = '\0'; |
97e3214d GM |
482 | } |
483 | else | |
484 | { | |
aa0b6932 | 485 | fprintf (stderr, "%s: invalid configuration info", progname); |
65396510 | 486 | exit (EXIT_FAILURE); |
97e3214d | 487 | } |
97e3214d | 488 | |
aa0b6932 JB |
489 | server->sin_family = AF_INET; |
490 | server->sin_addr.s_addr = inet_addr (dotted); | |
491 | server->sin_port = htons (atoi (port)); | |
97e3214d | 492 | |
aa0b6932 JB |
493 | if (! fread (authentication, AUTH_KEY_LENGTH, 1, config)) |
494 | { | |
495 | fprintf (stderr, "%s: cannot read authentication info", progname); | |
496 | exit (EXIT_FAILURE); | |
497 | } | |
46cec291 | 498 | |
aa0b6932 | 499 | fclose (config); |
97e3214d | 500 | |
434a6c5d JB |
501 | #ifdef WINDOWSNT |
502 | /* | |
503 | Modern Windows restrict which processes can set the foreground window. | |
504 | So, for emacsclient to be able to force Emacs into the foreground, we | |
505 | have to call AllowSetForegroundWindow(). Unfortunately, older Windows | |
506 | (W95, W98 and NT) don't have this function, so we have to check first. | |
507 | ||
508 | We're doing this here because it has to be done before sending info | |
509 | to Emacs, and otherwise we'll need a global variable just to pass around | |
510 | the pid, which is also inelegant. | |
511 | */ | |
512 | { | |
513 | HMODULE hUser32; | |
514 | ||
515 | if (hUser32 = LoadLibrary ("user32.dll")) | |
516 | { | |
2dc07a12 | 517 | FARPROC set_fg; |
434a6c5d JB |
518 | if (set_fg = GetProcAddress (hUser32, "AllowSetForegroundWindow")) |
519 | set_fg (atoi (pid)); | |
520 | FreeLibrary (hUser32); | |
521 | } | |
522 | } | |
523 | #endif | |
524 | ||
aa0b6932 | 525 | return TRUE; |
46cec291 RS |
526 | } |
527 | ||
aa0b6932 JB |
528 | HSOCKET |
529 | set_tcp_socket () | |
530 | { | |
531 | HSOCKET s; | |
532 | struct sockaddr_in server; | |
aa0b6932 JB |
533 | struct linger l_arg = {1, 1}; |
534 | char auth_string[AUTH_KEY_LENGTH + 1]; | |
46cec291 | 535 | |
aa0b6932 JB |
536 | if (! get_server_config (&server, auth_string)) |
537 | return INVALID_SOCKET; | |
538 | ||
b03d27bd JB |
539 | if (server.sin_addr.s_addr != inet_addr ("127.0.0.1")) |
540 | fprintf (stderr, "%s: connected to remote socket at %s\n", | |
541 | progname, inet_ntoa (server.sin_addr)); | |
542 | ||
aa0b6932 JB |
543 | /* |
544 | * Open up an AF_INET socket | |
545 | */ | |
546 | if ((s = socket (AF_INET, SOCK_STREAM, IPPROTO_TCP)) < 0) | |
547 | { | |
548 | fprintf (stderr, "%s: ", progname); | |
549 | perror ("socket"); | |
550 | return INVALID_SOCKET; | |
551 | } | |
552 | ||
553 | /* | |
554 | * Set up the socket | |
555 | */ | |
556 | if (connect (s, (struct sockaddr *) &server, sizeof server) < 0) | |
557 | { | |
558 | fprintf (stderr, "%s: ", progname); | |
559 | perror ("connect"); | |
560 | return INVALID_SOCKET; | |
561 | } | |
562 | ||
aa0b6932 JB |
563 | setsockopt (s, SOL_SOCKET, SO_LINGER, (char *) &l_arg, sizeof l_arg); |
564 | ||
565 | /* | |
566 | * Send the authentication | |
567 | */ | |
568 | auth_string[AUTH_KEY_LENGTH] = '\0'; | |
569 | ||
570 | SEND_STRING ("-auth "); | |
571 | SEND_STRING (auth_string); | |
572 | SEND_STRING ("\n"); | |
573 | ||
574 | return s; | |
575 | } | |
576 | ||
577 | #if !defined (NO_SOCKETS_IN_FILE_SYSTEM) | |
46cec291 | 578 | |
9f637eea GM |
579 | /* Three possibilities: |
580 | 2 - can't be `stat'ed (sets errno) | |
581 | 1 - isn't owned by us | |
582 | 0 - success: none of the above */ | |
583 | ||
584 | static int | |
585 | socket_status (socket_name) | |
586 | char *socket_name; | |
587 | { | |
588 | struct stat statbfr; | |
589 | ||
590 | if (stat (socket_name, &statbfr) == -1) | |
591 | return 2; | |
592 | ||
593 | if (statbfr.st_uid != geteuid ()) | |
594 | return 1; | |
595 | ||
596 | return 0; | |
597 | } | |
598 | ||
aa0b6932 JB |
599 | HSOCKET |
600 | set_local_socket () | |
46cec291 | 601 | { |
aa0b6932 | 602 | HSOCKET s; |
46cec291 | 603 | struct sockaddr_un server; |
46cec291 | 604 | |
e69233c2 | 605 | /* |
46cec291 RS |
606 | * Open up an AF_UNIX socket in this person's home directory |
607 | */ | |
608 | ||
609 | if ((s = socket (AF_UNIX, SOCK_STREAM, 0)) < 0) | |
610 | { | |
aa0b6932 | 611 | fprintf (stderr, "%s: ", progname); |
46cec291 | 612 | perror ("socket"); |
aa0b6932 | 613 | return INVALID_SOCKET; |
46cec291 | 614 | } |
e69233c2 | 615 | |
46cec291 | 616 | server.sun_family = AF_UNIX; |
c5fee545 | 617 | |
c5fee545 | 618 | { |
9f637eea | 619 | int sock_status = 0; |
5c9659d3 | 620 | int default_sock = !socket_name; |
152b6e83 | 621 | int saved_errno; |
0734b0d0 SM |
622 | char *server_name = "server"; |
623 | ||
624 | if (socket_name && !index (socket_name, '/') && !index (socket_name, '\\')) | |
625 | { /* socket_name is a file name component. */ | |
626 | server_name = socket_name; | |
627 | socket_name = NULL; | |
628 | default_sock = 1; /* Try both UIDs. */ | |
629 | } | |
efb859b4 | 630 | |
5c9659d3 | 631 | if (default_sock) |
254107e4 | 632 | { |
0734b0d0 SM |
633 | socket_name = alloca (100 + strlen (server_name)); |
634 | sprintf (socket_name, "/tmp/emacs%d/%s", | |
635 | (int) geteuid (), server_name); | |
254107e4 RS |
636 | } |
637 | ||
638 | if (strlen (socket_name) < sizeof (server.sun_path)) | |
639 | strcpy (server.sun_path, socket_name); | |
640 | else | |
5c9659d3 SM |
641 | { |
642 | fprintf (stderr, "%s: socket-name %s too long", | |
aa0b6932 | 643 | progname, socket_name); |
65396510 | 644 | exit (EXIT_FAILURE); |
5c9659d3 | 645 | } |
efb859b4 | 646 | |
9f637eea GM |
647 | /* See if the socket exists, and if it's owned by us. */ |
648 | sock_status = socket_status (server.sun_path); | |
152b6e83 | 649 | saved_errno = errno; |
5c9659d3 | 650 | if (sock_status && default_sock) |
efb859b4 | 651 | { |
9f637eea GM |
652 | /* Failing that, see if LOGNAME or USER exist and differ from |
653 | our euid. If so, look for a socket based on the UID | |
654 | associated with the name. This is reminiscent of the logic | |
655 | that init_editfns uses to set the global Vuser_full_name. */ | |
e69233c2 | 656 | |
9f637eea | 657 | char *user_name = (char *) getenv ("LOGNAME"); |
293f9f2a | 658 | |
9f637eea GM |
659 | if (!user_name) |
660 | user_name = (char *) getenv ("USER"); | |
e69233c2 | 661 | |
9f637eea GM |
662 | if (user_name) |
663 | { | |
664 | struct passwd *pw = getpwnam (user_name); | |
293f9f2a | 665 | |
9f637eea GM |
666 | if (pw && (pw->pw_uid != geteuid ())) |
667 | { | |
668 | /* We're running under su, apparently. */ | |
0734b0d0 SM |
669 | socket_name = alloca (100 + strlen (server_name)); |
670 | sprintf (socket_name, "/tmp/emacs%d/%s", | |
671 | (int) pw->pw_uid, server_name); | |
5c9659d3 SM |
672 | |
673 | if (strlen (socket_name) < sizeof (server.sun_path)) | |
674 | strcpy (server.sun_path, socket_name); | |
675 | else | |
676 | { | |
677 | fprintf (stderr, "%s: socket-name %s too long", | |
aa0b6932 | 678 | progname, socket_name); |
65396510 | 679 | exit (EXIT_FAILURE); |
5c9659d3 SM |
680 | } |
681 | ||
9f637eea | 682 | sock_status = socket_status (server.sun_path); |
152b6e83 | 683 | saved_errno = errno; |
9f637eea | 684 | } |
293f9f2a RS |
685 | else |
686 | errno = saved_errno; | |
9f637eea | 687 | } |
efb859b4 | 688 | } |
e69233c2 | 689 | |
aa0b6932 JB |
690 | switch (sock_status) |
691 | { | |
692 | case 1: | |
693 | /* There's a socket, but it isn't owned by us. This is OK if | |
694 | we are root. */ | |
695 | if (0 != geteuid ()) | |
696 | { | |
e35fc962 | 697 | fprintf (stderr, "%s: Invalid socket owner\n", progname); |
aa0b6932 JB |
698 | return INVALID_SOCKET; |
699 | } | |
700 | break; | |
701 | ||
702 | case 2: | |
703 | /* `stat' failed */ | |
704 | if (saved_errno == ENOENT) | |
705 | fprintf (stderr, | |
706 | "%s: can't find socket; have you started the server?\n\ | |
45adde32 | 707 | To start the server in Emacs, type \"M-x server-start\".\n", |
aa0b6932 JB |
708 | progname); |
709 | else | |
710 | fprintf (stderr, "%s: can't stat %s: %s\n", | |
711 | progname, server.sun_path, strerror (saved_errno)); | |
b03d27bd | 712 | return INVALID_SOCKET; |
aa0b6932 | 713 | } |
efb859b4 | 714 | } |
46cec291 | 715 | |
4e23f2ba JB |
716 | if (connect (s, (struct sockaddr *) &server, strlen (server.sun_path) + 2) |
717 | < 0) | |
46cec291 | 718 | { |
aa0b6932 | 719 | fprintf (stderr, "%s: ", progname); |
46cec291 | 720 | perror ("connect"); |
aa0b6932 | 721 | return INVALID_SOCKET; |
46cec291 | 722 | } |
23a7488d | 723 | |
aa0b6932 JB |
724 | return s; |
725 | } | |
726 | #endif /* ! NO_SOCKETS_IN_FILE_SYSTEM */ | |
727 | ||
728 | HSOCKET | |
729 | set_socket () | |
730 | { | |
b03d27bd JB |
731 | HSOCKET s; |
732 | ||
733 | INITIALIZE (); | |
734 | ||
aa0b6932 | 735 | #ifndef NO_SOCKETS_IN_FILE_SYSTEM |
b03d27bd JB |
736 | /* Explicit --socket-name argument. */ |
737 | if (socket_name) | |
738 | { | |
739 | s = set_local_socket (); | |
740 | if ((s != INVALID_SOCKET) || alternate_editor) | |
741 | return s; | |
742 | ||
743 | fprintf (stderr, "%s: error accessing socket \"%s\"", | |
744 | progname, socket_name); | |
745 | exit (EXIT_FAILURE); | |
746 | } | |
747 | #endif | |
748 | ||
749 | /* Explicit --server-file arg or EMACS_SERVER_FILE variable. */ | |
750 | if (!server_file) | |
751 | server_file = getenv ("EMACS_SERVER_FILE"); | |
752 | ||
753 | if (server_file) | |
46cec291 | 754 | { |
b03d27bd JB |
755 | s = set_tcp_socket (); |
756 | if ((s != INVALID_SOCKET) || alternate_editor) | |
757 | return s; | |
758 | ||
759 | fprintf (stderr, "%s: error accessing server file \"%s\"", | |
760 | progname, server_file); | |
761 | exit (EXIT_FAILURE); | |
46cec291 | 762 | } |
b03d27bd JB |
763 | |
764 | #ifndef NO_SOCKETS_IN_FILE_SYSTEM | |
765 | /* Implicit local socket. */ | |
766 | s = set_local_socket (); | |
767 | if (s != INVALID_SOCKET) | |
768 | return s; | |
769 | #endif | |
770 | ||
771 | /* Implicit server file. */ | |
772 | server_file = "server"; | |
773 | s = set_tcp_socket (); | |
774 | if ((s != INVALID_SOCKET) || alternate_editor) | |
775 | return s; | |
776 | ||
777 | /* No implicit or explicit socket, and no alternate editor. */ | |
778 | fprintf (stderr, "%s: No socket or alternate editor. Please use:\n\n" | |
779 | #ifndef NO_SOCKETS_IN_FILE_SYSTEM | |
780 | "\t--socket-name\n" | |
aa0b6932 | 781 | #endif |
b03d27bd JB |
782 | "\t--server-file (or environment variable EMACS_SERVER_FILE)\n\ |
783 | \t--alternate-editor (or environment variable ALTERNATE_EDITOR)\n", | |
784 | progname); | |
785 | exit (EXIT_FAILURE); | |
aa0b6932 | 786 | } |
46cec291 | 787 | |
aa0b6932 JB |
788 | int |
789 | main (argc, argv) | |
790 | int argc; | |
791 | char **argv; | |
792 | { | |
793 | HSOCKET s; | |
794 | int i, rl, needlf = 0; | |
795 | char *cwd; | |
796 | char string[BUFSIZ+1]; | |
797 | ||
798 | progname = argv[0]; | |
799 | ||
800 | /* Process options. */ | |
801 | decode_options (argc, argv); | |
802 | ||
803 | if ((argc - optind < 1) && !eval) | |
23a7488d | 804 | { |
aa0b6932 JB |
805 | fprintf (stderr, "%s: file name or argument required\n", progname); |
806 | fprintf (stderr, "Try `%s --help' for more information\n", progname); | |
807 | exit (EXIT_FAILURE); | |
23a7488d RS |
808 | } |
809 | ||
aa0b6932 JB |
810 | if ((s = set_socket ()) == INVALID_SOCKET) |
811 | fail (argc, argv); | |
812 | ||
38732dba | 813 | #ifdef HAVE_GETCWD |
ee6a193c | 814 | cwd = getcwd (string, sizeof string); |
38732dba RS |
815 | #else |
816 | cwd = getwd (string); | |
ee6a193c | 817 | #endif |
46cec291 RS |
818 | if (cwd == 0) |
819 | { | |
820 | /* getwd puts message in STRING if it fails. */ | |
38732dba | 821 | #ifdef HAVE_GETCWD |
aa0b6932 | 822 | fprintf (stderr, "%s: %s (%s)\n", progname, |
bb5618fe | 823 | "Cannot get current working directory", strerror (errno)); |
38732dba | 824 | #else |
aa0b6932 | 825 | fprintf (stderr, "%s: %s (%s)\n", progname, string, strerror (errno)); |
bd252662 | 826 | #endif |
97e3214d | 827 | fail (argc, argv); |
46cec291 RS |
828 | } |
829 | ||
5212210c | 830 | if (nowait) |
aa0b6932 | 831 | SEND_STRING ("-nowait "); |
292d74a3 | 832 | |
30be2360 | 833 | if (eval) |
aa0b6932 | 834 | SEND_STRING ("-eval "); |
30be2360 SM |
835 | |
836 | if (display) | |
87209357 | 837 | { |
aa0b6932 JB |
838 | SEND_STRING ("-display "); |
839 | SEND_QUOTED (display); | |
840 | SEND_STRING (" "); | |
87209357 | 841 | } |
30be2360 | 842 | |
87209357 | 843 | if ((argc - optind > 0)) |
5212210c | 844 | { |
87209357 | 845 | for (i = optind; i < argc; i++) |
46cec291 | 846 | { |
87209357 EZ |
847 | if (eval) |
848 | ; /* Don't prepend any cwd or anything like that. */ | |
849 | else if (*argv[i] == '+') | |
850 | { | |
851 | char *p = argv[i] + 1; | |
852 | while (isdigit ((unsigned char) *p) || *p == ':') p++; | |
853 | if (*p != 0) | |
854 | { | |
aa0b6932 JB |
855 | SEND_QUOTED (cwd); |
856 | SEND_STRING ("/"); | |
87209357 EZ |
857 | } |
858 | } | |
b03d27bd | 859 | else if (! file_name_absolute_p (argv[i])) |
87209357 | 860 | { |
aa0b6932 JB |
861 | SEND_QUOTED (cwd); |
862 | SEND_STRING ("/"); | |
87209357 EZ |
863 | } |
864 | ||
aa0b6932 JB |
865 | SEND_QUOTED (argv[i]); |
866 | SEND_STRING (" "); | |
46cec291 | 867 | } |
46cec291 | 868 | } |
87209357 EZ |
869 | else |
870 | { | |
aa0b6932 | 871 | while (fgets (string, BUFSIZ, stdin)) |
87209357 | 872 | { |
aa0b6932 | 873 | SEND_QUOTED (string); |
87209357 | 874 | } |
aa0b6932 | 875 | SEND_STRING (" "); |
87209357 | 876 | } |
65396510 | 877 | |
aa0b6932 | 878 | SEND_STRING ("\n"); |
46cec291 | 879 | |
292d74a3 | 880 | /* Maybe wait for an answer. */ |
aa0b6932 | 881 | if (!nowait) |
30be2360 | 882 | { |
aa0b6932 JB |
883 | if (!eval) |
884 | { | |
885 | printf ("Waiting for Emacs..."); | |
886 | needlf = 2; | |
887 | } | |
888 | fflush (stdout); | |
889 | ||
890 | /* Now, wait for an answer and print any messages. */ | |
891 | while ((rl = recv (s, string, BUFSIZ, 0)) > 0) | |
892 | { | |
893 | string[rl] = '\0'; | |
894 | if (needlf == 2) | |
895 | printf ("\n"); | |
896 | printf ("%s", string); | |
897 | needlf = string[0] == '\0' ? needlf : string[strlen (string) - 1] != '\n'; | |
898 | } | |
899 | ||
900 | if (needlf) | |
901 | printf ("\n"); | |
902 | fflush (stdout); | |
30be2360 | 903 | } |
23a7488d | 904 | |
aa0b6932 | 905 | CLOSE_SOCKET (s); |
65396510 | 906 | return EXIT_SUCCESS; |
46cec291 RS |
907 | } |
908 | ||
1e7823d0 | 909 | #endif /* HAVE_SOCKETS && HAVE_INET_SOCKETS */ |
aa0b6932 | 910 | |
27711600 RM |
911 | #ifndef HAVE_STRERROR |
912 | char * | |
913 | strerror (errnum) | |
914 | int errnum; | |
915 | { | |
916 | extern char *sys_errlist[]; | |
917 | extern int sys_nerr; | |
918 | ||
919 | if (errnum >= 0 && errnum < sys_nerr) | |
920 | return sys_errlist[errnum]; | |
921 | return (char *) "Unknown error"; | |
922 | } | |
923 | ||
924 | #endif /* ! HAVE_STRERROR */ | |
ab5796a9 MB |
925 | |
926 | /* arch-tag: f39bb9c4-73eb-477e-896d-50832e2ca9a7 | |
927 | (do not change this comment) */ | |
65396510 TTN |
928 | |
929 | /* emacsclient.c ends here */ |