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, |
4e6835db | 3 | 2005, 2006, 2007 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> | |
42073bfb | 37 | # include <windows.h> |
411b80a5 | 38 | |
411b80a5 JB |
39 | # define NO_SOCKETS_IN_FILE_SYSTEM |
40 | ||
aa0b6932 JB |
41 | # define HSOCKET SOCKET |
42 | # define CLOSE_SOCKET closesocket | |
aa0b6932 | 43 | # define INITIALIZE() (initialize_sockets ()) |
411b80a5 JB |
44 | |
45 | #else /* !WINDOWSNT */ | |
46 | ||
ed4a3730 JB |
47 | # include <sys/types.h> |
48 | ||
1e7823d0 JB |
49 | # ifdef HAVE_INET_SOCKETS |
50 | # include <netinet/in.h> | |
51 | # endif | |
411b80a5 | 52 | |
e35fc962 | 53 | # define INVALID_SOCKET -1 |
aa0b6932 JB |
54 | # define HSOCKET int |
55 | # define CLOSE_SOCKET close | |
aa0b6932 | 56 | # define INITIALIZE() |
411b80a5 JB |
57 | |
58 | #endif /* !WINDOWSNT */ | |
aa0b6932 | 59 | |
4e23f2ba | 60 | #undef signal |
46cec291 | 61 | |
42073bfb | 62 | #include <stdarg.h> |
e69233c2 | 63 | #include <ctype.h> |
8f9aaa0a | 64 | #include <stdio.h> |
aa0b6932 | 65 | #include "getopt.h" |
79f13bba DL |
66 | #ifdef HAVE_UNISTD_H |
67 | #include <unistd.h> | |
68 | #endif | |
8f9aaa0a | 69 | |
9f637eea GM |
70 | #ifdef VMS |
71 | # include "vms-pwd.h" | |
aa0b6932 JB |
72 | #else /* not VMS */ |
73 | #ifdef WINDOWSNT | |
74 | # include <io.h> | |
75 | #else /* not WINDOWSNT */ | |
9f637eea | 76 | # include <pwd.h> |
aa0b6932 | 77 | #endif /* not WINDOWSNT */ |
9f637eea GM |
78 | #endif /* not VMS */ |
79 | ||
8f9aaa0a | 80 | char *getenv (), *getwd (); |
5b9562c3 | 81 | char *(getcwd) (); |
8f9aaa0a | 82 | |
8f9aaa0a RS |
83 | #ifndef VERSION |
84 | #define VERSION "unspecified" | |
85 | #endif | |
86 | \f | |
aa0b6932 JB |
87 | #define SEND_STRING(data) (send_to_emacs (s, (data))) |
88 | #define SEND_QUOTED(data) (quote_file_name (s, (data))) | |
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 | ||
98 | #ifndef FALSE | |
99 | #define FALSE 0 | |
100 | #endif | |
101 | ||
102 | #ifndef TRUE | |
103 | #define TRUE 1 | |
104 | #endif | |
105 | ||
106 | #ifndef NO_RETURN | |
107 | #define NO_RETURN | |
108 | #endif | |
109 | \f | |
8f9aaa0a RS |
110 | /* Name used to invoke this program. */ |
111 | char *progname; | |
112 | ||
749ae770 | 113 | /* Nonzero means don't wait for a response from Emacs. --no-wait. */ |
8f9aaa0a RS |
114 | int nowait = 0; |
115 | ||
30be2360 SM |
116 | /* Nonzero means args are expressions to be evaluated. --eval. */ |
117 | int eval = 0; | |
118 | ||
119 | /* The display on which Emacs should work. --display. */ | |
120 | char *display = NULL; | |
121 | ||
122 | /* If non-NULL, the name of an editor to fallback to if the server | |
123 | is not running. --alternate-editor. */ | |
b03d27bd | 124 | const char *alternate_editor = NULL; |
30be2360 | 125 | |
3db926be | 126 | /* If non-NULL, the filename of the UNIX socket. */ |
254107e4 RS |
127 | char *socket_name = NULL; |
128 | ||
aa0b6932 JB |
129 | /* If non-NULL, the filename of the authentication file. */ |
130 | char *server_file = NULL; | |
131 | ||
c66648e0 JB |
132 | /* PID of the Emacs server process. */ |
133 | int emacs_pid = 0; | |
134 | ||
2381d38d | 135 | void print_help_and_exit () NO_RETURN; |
7f3bff3e | 136 | |
8f9aaa0a RS |
137 | struct option longopts[] = |
138 | { | |
749ae770 | 139 | { "no-wait", no_argument, NULL, 'n' }, |
30be2360 | 140 | { "eval", no_argument, NULL, 'e' }, |
8f9aaa0a RS |
141 | { "help", no_argument, NULL, 'H' }, |
142 | { "version", no_argument, NULL, 'V' }, | |
3cf8c6aa | 143 | { "alternate-editor", required_argument, NULL, 'a' }, |
b03d27bd | 144 | #ifndef NO_SOCKETS_IN_FILE_SYSTEM |
254107e4 | 145 | { "socket-name", required_argument, NULL, 's' }, |
b03d27bd | 146 | #endif |
aa0b6932 | 147 | { "server-file", required_argument, NULL, 'f' }, |
30be2360 SM |
148 | { "display", required_argument, NULL, 'd' }, |
149 | { 0, 0, 0, 0 } | |
8f9aaa0a RS |
150 | }; |
151 | ||
42073bfb JB |
152 | /* Message functions. */ |
153 | ||
154 | #ifdef WINDOWSNT | |
42073bfb | 155 | int |
f0384499 | 156 | w32_window_app () |
42073bfb JB |
157 | { |
158 | static int window_app = -1; | |
159 | char szTitle[MAX_PATH]; | |
160 | ||
161 | if (window_app < 0) | |
0d3d6719 JB |
162 | /* Checking for STDOUT does not work; it's a valid handle also in |
163 | nonconsole apps. Testing for the console title seems to work. */ | |
42073bfb JB |
164 | window_app = (GetConsoleTitleA (szTitle, MAX_PATH) == 0); |
165 | ||
166 | return window_app; | |
167 | } | |
168 | #endif | |
169 | ||
170 | void | |
171 | message (int is_error, char *message, ...) | |
172 | { | |
c66648e0 | 173 | char msg [2048]; |
42073bfb JB |
174 | va_list args; |
175 | ||
176 | va_start (args, message); | |
42073bfb JB |
177 | vsprintf (msg, message, args); |
178 | va_end (args); | |
179 | ||
180 | #ifdef WINDOWSNT | |
181 | if (w32_window_app ()) | |
182 | { | |
183 | if (is_error) | |
184 | MessageBox (NULL, msg, "Emacsclient ERROR", MB_ICONERROR); | |
185 | else | |
186 | MessageBox (NULL, msg, "Emacsclient", MB_ICONINFORMATION); | |
187 | } | |
188 | else | |
189 | #endif | |
9219db75 JB |
190 | { |
191 | FILE *f = is_error ? stderr : stdout; | |
192 | ||
193 | fputs (msg, f); | |
194 | fflush (f); | |
195 | } | |
42073bfb JB |
196 | } |
197 | ||
8f9aaa0a | 198 | /* Decode the options from argv and argc. |
5212210c | 199 | The global variable `optind' will say how many arguments we used up. */ |
8f9aaa0a | 200 | |
5212210c | 201 | void |
8f9aaa0a RS |
202 | decode_options (argc, argv) |
203 | int argc; | |
204 | char **argv; | |
205 | { | |
b6b6d6d2 SM |
206 | alternate_editor = getenv ("ALTERNATE_EDITOR"); |
207 | ||
8f9aaa0a RS |
208 | while (1) |
209 | { | |
210 | int opt = getopt_long (argc, argv, | |
b03d27bd JB |
211 | #ifndef NO_SOCKETS_IN_FILE_SYSTEM |
212 | "VHnea:s:f:d:", | |
213 | #else | |
214 | "VHnea:f:d:", | |
215 | #endif | |
216 | longopts, 0); | |
8f9aaa0a RS |
217 | |
218 | if (opt == EOF) | |
219 | break; | |
220 | ||
221 | switch (opt) | |
222 | { | |
223 | case 0: | |
224 | /* If getopt returns 0, then it has already processed a | |
225 | long-named option. We should do nothing. */ | |
226 | break; | |
e69233c2 | 227 | |
97e3214d GM |
228 | case 'a': |
229 | alternate_editor = optarg; | |
230 | break; | |
e69233c2 | 231 | |
b03d27bd | 232 | #ifndef NO_SOCKETS_IN_FILE_SYSTEM |
254107e4 RS |
233 | case 's': |
234 | socket_name = optarg; | |
235 | break; | |
b03d27bd | 236 | #endif |
254107e4 | 237 | |
aa0b6932 JB |
238 | case 'f': |
239 | server_file = optarg; | |
240 | break; | |
241 | ||
30be2360 SM |
242 | case 'd': |
243 | display = optarg; | |
244 | break; | |
245 | ||
8f9aaa0a RS |
246 | case 'n': |
247 | nowait = 1; | |
248 | break; | |
249 | ||
30be2360 SM |
250 | case 'e': |
251 | eval = 1; | |
252 | break; | |
253 | ||
8f9aaa0a | 254 | case 'V': |
42073bfb | 255 | message (FALSE, "emacsclient %s\n", VERSION); |
65396510 | 256 | exit (EXIT_SUCCESS); |
8f9aaa0a | 257 | break; |
46cec291 | 258 | |
8f9aaa0a | 259 | case 'H': |
8f9aaa0a | 260 | print_help_and_exit (); |
20c396e8 JB |
261 | break; |
262 | ||
263 | default: | |
42073bfb | 264 | message (TRUE, "Try `%s --help' for more information\n", progname); |
65396510 | 265 | exit (EXIT_FAILURE); |
20c396e8 | 266 | break; |
8f9aaa0a RS |
267 | } |
268 | } | |
8f9aaa0a RS |
269 | } |
270 | ||
7f3bff3e | 271 | void |
8f9aaa0a RS |
272 | print_help_and_exit () |
273 | { | |
42073bfb | 274 | message (FALSE, |
20c396e8 | 275 | "Usage: %s [OPTIONS] FILE...\n\ |
30be2360 SM |
276 | Tell the Emacs server to visit the specified files.\n\ |
277 | Every FILE can be either just a FILENAME or [+LINE[:COLUMN]] FILENAME.\n\ | |
20c396e8 | 278 | \n\ |
30be2360 | 279 | The following OPTIONS are accepted:\n\ |
30aa95ce JB |
280 | \n\ |
281 | -V, --version Just print version info and return\n\ | |
282 | -H, --help Print this usage information message\n\ | |
283 | -e, --eval Evaluate FILE arguments as Lisp expressions\n\ | |
284 | -n, --no-wait Don't wait for the server to return\n\ | |
285 | -d, --display=DISPLAY Visit the file in the given display\n" | |
aa0b6932 JB |
286 | #ifndef NO_SOCKETS_IN_FILE_SYSTEM |
287 | "-s, --socket-name=FILENAME\n\ | |
30aa95ce | 288 | Set filename of the UNIX socket for communication\n" |
aa0b6932 JB |
289 | #endif |
290 | "-f, --server-file=FILENAME\n\ | |
30aa95ce | 291 | Set filename of the TCP authentication file\n\ |
30be2360 | 292 | -a, --alternate-editor=EDITOR\n\ |
30aa95ce | 293 | Editor to fallback to if server is not running\n\ |
20c396e8 | 294 | \n\ |
30be2360 | 295 | Report bugs to bug-gnu-emacs@gnu.org.\n", progname); |
65396510 | 296 | exit (EXIT_SUCCESS); |
8f9aaa0a | 297 | } |
5212210c | 298 | |
aa0b6932 | 299 | \f |
4472aef4 JB |
300 | #ifdef WINDOWSNT |
301 | ||
302 | /* | |
f0384499 | 303 | execvp wrapper for Windows. Quotes arguments with embedded spaces. |
4472aef4 JB |
304 | |
305 | This is necessary due to the broken implementation of exec* routines in | |
306 | the Microsoft libraries: they concatenate the arguments together without | |
307 | quoting special characters, and pass the result to CreateProcess, with | |
308 | predictably bad results. By contrast, Posix execvp passes the arguments | |
f0384499 | 309 | directly into the argv array of the child process. |
4472aef4 JB |
310 | */ |
311 | int | |
312 | w32_execvp (path, argv) | |
313 | char *path; | |
314 | char **argv; | |
315 | { | |
316 | int i; | |
317 | ||
0d3d6719 | 318 | /* Required to allow a .BAT script as alternate editor. */ |
4472aef4 JB |
319 | argv[0] = (char *) alternate_editor; |
320 | ||
321 | for (i = 0; argv[i]; i++) | |
322 | if (strchr (argv[i], ' ')) | |
323 | { | |
324 | char *quoted = alloca (strlen (argv[i]) + 3); | |
325 | sprintf (quoted, "\"%s\"", argv[i]); | |
326 | argv[i] = quoted; | |
327 | } | |
328 | ||
329 | return execvp (path, argv); | |
330 | } | |
331 | ||
332 | #undef execvp | |
333 | #define execvp w32_execvp | |
334 | ||
335 | #endif /* WINDOWSNT */ | |
336 | ||
aa0b6932 JB |
337 | /* |
338 | Try to run a different command, or --if no alternate editor is | |
339 | defined-- exit with an errorcode. | |
340 | */ | |
341 | void | |
342 | fail (argc, argv) | |
343 | int argc; | |
344 | char **argv; | |
345 | { | |
346 | if (alternate_editor) | |
347 | { | |
348 | int i = optind - 1; | |
4472aef4 | 349 | |
aa0b6932 | 350 | execvp (alternate_editor, argv + i); |
42073bfb | 351 | message (TRUE, "%s: error executing alternate editor \"%s\"\n", |
aa0b6932 JB |
352 | progname, alternate_editor); |
353 | } | |
aa0b6932 JB |
354 | exit (EXIT_FAILURE); |
355 | } | |
356 | ||
357 | \f | |
1e7823d0 | 358 | #if !defined (HAVE_SOCKETS) || !defined (HAVE_INET_SOCKETS) |
aa0b6932 JB |
359 | |
360 | int | |
361 | main (argc, argv) | |
362 | int argc; | |
363 | char **argv; | |
364 | { | |
42073bfb | 365 | message (TRUE, "%s: Sorry, the Emacs server is supported only\non systems with Berkely sockets.\n", |
aa0b6932 | 366 | argv[0]); |
aa0b6932 JB |
367 | |
368 | fail (argc, argv); | |
369 | } | |
370 | ||
1e7823d0 | 371 | #else /* HAVE_SOCKETS && HAVE_INET_SOCKETS */ |
aa0b6932 JB |
372 | |
373 | #ifdef WINDOWSNT | |
374 | # include <winsock2.h> | |
375 | #else | |
376 | # include <sys/types.h> | |
377 | # include <sys/socket.h> | |
378 | # include <sys/un.h> | |
379 | # include <sys/stat.h> | |
380 | # include <errno.h> | |
381 | #endif | |
382 | ||
383 | #define AUTH_KEY_LENGTH 64 | |
384 | #define SEND_BUFFER_SIZE 4096 | |
385 | ||
386 | extern char *strerror (); | |
387 | extern int errno; | |
388 | ||
389 | /* Buffer to accumulate data to send in TCP connections. */ | |
390 | char send_buffer[SEND_BUFFER_SIZE + 1]; | |
391 | int sblen = 0; /* Fill pointer for the send buffer. */ | |
392 | ||
393 | /* Let's send the data to Emacs when either | |
394 | - the data ends in "\n", or | |
395 | - the buffer is full (but this shouldn't happen) | |
396 | Otherwise, we just accumulate it. */ | |
b03d27bd JB |
397 | void |
398 | send_to_emacs (s, data) | |
aa0b6932 JB |
399 | HSOCKET s; |
400 | char *data; | |
401 | { | |
402 | while (data) | |
403 | { | |
404 | int dlen = strlen (data); | |
405 | if (dlen + sblen >= SEND_BUFFER_SIZE) | |
406 | { | |
407 | int part = SEND_BUFFER_SIZE - sblen; | |
408 | strncpy (&send_buffer[sblen], data, part); | |
409 | data += part; | |
410 | sblen = SEND_BUFFER_SIZE; | |
411 | } | |
412 | else if (dlen) | |
413 | { | |
414 | strcpy (&send_buffer[sblen], data); | |
415 | data = NULL; | |
416 | sblen += dlen; | |
417 | } | |
418 | else | |
419 | break; | |
420 | ||
421 | if (sblen == SEND_BUFFER_SIZE | |
422 | || (sblen > 0 && send_buffer[sblen-1] == '\n')) | |
423 | { | |
424 | int sent = send (s, send_buffer, sblen, 0); | |
425 | if (sent != sblen) | |
426 | strcpy (send_buffer, &send_buffer[sent]); | |
427 | sblen -= sent; | |
428 | } | |
429 | } | |
430 | } | |
431 | ||
a4cf2096 RS |
432 | /* In NAME, insert a & before each &, each space, each newline, and |
433 | any initial -. Change spaces to underscores, too, so that the | |
5212210c | 434 | return value never contains a space. */ |
87209357 | 435 | void |
aa0b6932 JB |
436 | quote_file_name (s, name) |
437 | HSOCKET s; | |
5212210c RS |
438 | char *name; |
439 | { | |
440 | char *copy = (char *) malloc (strlen (name) * 2 + 1); | |
441 | char *p, *q; | |
442 | ||
443 | p = name; | |
444 | q = copy; | |
445 | while (*p) | |
446 | { | |
447 | if (*p == ' ') | |
448 | { | |
f1db6a73 | 449 | *q++ = '&'; |
5212210c RS |
450 | *q++ = '_'; |
451 | p++; | |
452 | } | |
3cf8c6aa SM |
453 | else if (*p == '\n') |
454 | { | |
455 | *q++ = '&'; | |
456 | *q++ = 'n'; | |
457 | p++; | |
458 | } | |
5212210c RS |
459 | else |
460 | { | |
f1db6a73 RS |
461 | if (*p == '&' || (*p == '-' && p == name)) |
462 | *q++ = '&'; | |
5212210c RS |
463 | *q++ = *p++; |
464 | } | |
465 | } | |
f1db6a73 | 466 | *q++ = 0; |
5212210c | 467 | |
aa0b6932 | 468 | SEND_STRING (copy); |
87209357 EZ |
469 | |
470 | free (copy); | |
5212210c | 471 | } |
0c76956f | 472 | |
b03d27bd JB |
473 | int |
474 | file_name_absolute_p (filename) | |
475 | const unsigned char *filename; | |
476 | { | |
477 | /* Sanity check, it shouldn't happen. */ | |
478 | if (! filename) return FALSE; | |
479 | ||
480 | /* /xxx is always an absolute path. */ | |
481 | if (filename[0] == '/') return TRUE; | |
482 | ||
483 | /* Empty filenames (which shouldn't happen) are relative. */ | |
484 | if (filename[0] == '\0') return FALSE; | |
485 | ||
486 | #ifdef WINDOWSNT | |
487 | /* X:\xxx is always absolute; X:xxx is an error and will fail. */ | |
5f7a4874 | 488 | if (isalpha (filename[0]) |
cb0297bb | 489 | && filename[1] == ':' && (filename[2] == '\\' || filename[2] == '/')) |
b03d27bd JB |
490 | return TRUE; |
491 | ||
492 | /* Both \xxx and \\xxx\yyy are absolute. */ | |
493 | if (filename[0] == '\\') return TRUE; | |
494 | #endif | |
495 | ||
496 | return FALSE; | |
497 | } | |
498 | ||
aa0b6932 | 499 | #ifdef WINDOWSNT |
f0384499 | 500 | /* Wrapper to make WSACleanup a cdecl, as required by atexit. */ |
b03d27bd JB |
501 | void |
502 | __cdecl close_winsock () | |
aa0b6932 JB |
503 | { |
504 | WSACleanup (); | |
505 | } | |
0c76956f | 506 | |
b03d27bd JB |
507 | /* Initialize the WinSock2 library. */ |
508 | void | |
509 | initialize_sockets () | |
0c76956f | 510 | { |
aa0b6932 JB |
511 | WSADATA wsaData; |
512 | ||
aa0b6932 JB |
513 | if (WSAStartup (MAKEWORD (2, 0), &wsaData)) |
514 | { | |
42073bfb | 515 | message (TRUE, "%s: error initializing WinSock2", progname); |
aa0b6932 JB |
516 | exit (EXIT_FAILURE); |
517 | } | |
518 | ||
519 | atexit (close_winsock); | |
0c76956f | 520 | } |
e35fc962 | 521 | #endif /* WINDOWSNT */ |
8f9aaa0a | 522 | \f |
97e3214d | 523 | /* |
aa0b6932 | 524 | * Read the information needed to set up a TCP comm channel with |
434a6c5d | 525 | * the Emacs server: host, port, pid and authentication string. |
0e0dced5 | 526 | */ |
b03d27bd JB |
527 | int |
528 | get_server_config (server, authentication) | |
aa0b6932 JB |
529 | struct sockaddr_in *server; |
530 | char *authentication; | |
97e3214d | 531 | { |
aa0b6932 JB |
532 | char dotted[32]; |
533 | char *port; | |
434a6c5d | 534 | char *pid; |
b03d27bd | 535 | FILE *config = NULL; |
aa0b6932 | 536 | |
b03d27bd JB |
537 | if (file_name_absolute_p (server_file)) |
538 | config = fopen (server_file, "rb"); | |
539 | else | |
97e3214d | 540 | { |
aa0b6932 | 541 | char *home = getenv ("HOME"); |
88b46d84 | 542 | |
aa0b6932 JB |
543 | if (home) |
544 | { | |
545 | char *path = alloca (32 + strlen (home) + strlen (server_file)); | |
546 | sprintf (path, "%s/.emacs.d/server/%s", home, server_file); | |
547 | config = fopen (path, "rb"); | |
548 | } | |
88b46d84 JB |
549 | #ifdef WINDOWSNT |
550 | if (!config && (home = getenv ("APPDATA"))) | |
551 | { | |
552 | char *path = alloca (32 + strlen (home) + strlen (server_file)); | |
553 | sprintf (path, "%s/.emacs.d/server/%s", home, server_file); | |
554 | config = fopen (path, "rb"); | |
555 | } | |
556 | #endif | |
aa0b6932 JB |
557 | } |
558 | ||
559 | if (! config) | |
560 | return FALSE; | |
561 | ||
562 | if (fgets (dotted, sizeof dotted, config) | |
434a6c5d JB |
563 | && (port = strchr (dotted, ':')) |
564 | && (pid = strchr (port, ' '))) | |
aa0b6932 JB |
565 | { |
566 | *port++ = '\0'; | |
434a6c5d | 567 | *pid++ = '\0'; |
97e3214d GM |
568 | } |
569 | else | |
570 | { | |
42073bfb | 571 | message (TRUE, "%s: invalid configuration info", progname); |
65396510 | 572 | exit (EXIT_FAILURE); |
97e3214d | 573 | } |
97e3214d | 574 | |
aa0b6932 JB |
575 | server->sin_family = AF_INET; |
576 | server->sin_addr.s_addr = inet_addr (dotted); | |
577 | server->sin_port = htons (atoi (port)); | |
97e3214d | 578 | |
aa0b6932 JB |
579 | if (! fread (authentication, AUTH_KEY_LENGTH, 1, config)) |
580 | { | |
42073bfb | 581 | message (TRUE, "%s: cannot read authentication info", progname); |
aa0b6932 JB |
582 | exit (EXIT_FAILURE); |
583 | } | |
46cec291 | 584 | |
aa0b6932 | 585 | fclose (config); |
97e3214d | 586 | |
c66648e0 | 587 | emacs_pid = atoi (pid); |
434a6c5d | 588 | |
aa0b6932 | 589 | return TRUE; |
46cec291 RS |
590 | } |
591 | ||
aa0b6932 JB |
592 | HSOCKET |
593 | set_tcp_socket () | |
594 | { | |
595 | HSOCKET s; | |
596 | struct sockaddr_in server; | |
aa0b6932 JB |
597 | struct linger l_arg = {1, 1}; |
598 | char auth_string[AUTH_KEY_LENGTH + 1]; | |
46cec291 | 599 | |
aa0b6932 JB |
600 | if (! get_server_config (&server, auth_string)) |
601 | return INVALID_SOCKET; | |
602 | ||
b03d27bd | 603 | if (server.sin_addr.s_addr != inet_addr ("127.0.0.1")) |
9219db75 | 604 | message (FALSE, "%s: connected to remote socket at %s\n", |
b03d27bd JB |
605 | progname, inet_ntoa (server.sin_addr)); |
606 | ||
aa0b6932 JB |
607 | /* |
608 | * Open up an AF_INET socket | |
609 | */ | |
610 | if ((s = socket (AF_INET, SOCK_STREAM, IPPROTO_TCP)) < 0) | |
611 | { | |
42073bfb | 612 | message (TRUE, "%s: socket: %s\n", progname, strerror (errno)); |
aa0b6932 JB |
613 | return INVALID_SOCKET; |
614 | } | |
615 | ||
616 | /* | |
617 | * Set up the socket | |
618 | */ | |
619 | if (connect (s, (struct sockaddr *) &server, sizeof server) < 0) | |
620 | { | |
42073bfb | 621 | message (TRUE, "%s: connect: %s\n", progname, strerror (errno)); |
aa0b6932 JB |
622 | return INVALID_SOCKET; |
623 | } | |
624 | ||
aa0b6932 JB |
625 | setsockopt (s, SOL_SOCKET, SO_LINGER, (char *) &l_arg, sizeof l_arg); |
626 | ||
627 | /* | |
628 | * Send the authentication | |
629 | */ | |
630 | auth_string[AUTH_KEY_LENGTH] = '\0'; | |
631 | ||
632 | SEND_STRING ("-auth "); | |
633 | SEND_STRING (auth_string); | |
634 | SEND_STRING ("\n"); | |
635 | ||
636 | return s; | |
637 | } | |
638 | ||
639 | #if !defined (NO_SOCKETS_IN_FILE_SYSTEM) | |
46cec291 | 640 | |
9f637eea GM |
641 | /* Three possibilities: |
642 | 2 - can't be `stat'ed (sets errno) | |
643 | 1 - isn't owned by us | |
644 | 0 - success: none of the above */ | |
645 | ||
646 | static int | |
647 | socket_status (socket_name) | |
648 | char *socket_name; | |
649 | { | |
650 | struct stat statbfr; | |
651 | ||
652 | if (stat (socket_name, &statbfr) == -1) | |
653 | return 2; | |
654 | ||
655 | if (statbfr.st_uid != geteuid ()) | |
656 | return 1; | |
657 | ||
658 | return 0; | |
659 | } | |
660 | ||
aa0b6932 JB |
661 | HSOCKET |
662 | set_local_socket () | |
46cec291 | 663 | { |
aa0b6932 | 664 | HSOCKET s; |
46cec291 | 665 | struct sockaddr_un server; |
46cec291 | 666 | |
e69233c2 | 667 | /* |
46cec291 RS |
668 | * Open up an AF_UNIX socket in this person's home directory |
669 | */ | |
670 | ||
671 | if ((s = socket (AF_UNIX, SOCK_STREAM, 0)) < 0) | |
672 | { | |
42073bfb | 673 | message (TRUE, "%s: socket: %s\n", progname, strerror (errno)); |
aa0b6932 | 674 | return INVALID_SOCKET; |
46cec291 | 675 | } |
e69233c2 | 676 | |
46cec291 | 677 | server.sun_family = AF_UNIX; |
c5fee545 | 678 | |
c5fee545 | 679 | { |
9f637eea | 680 | int sock_status = 0; |
5c9659d3 | 681 | int default_sock = !socket_name; |
152b6e83 | 682 | int saved_errno; |
0734b0d0 SM |
683 | char *server_name = "server"; |
684 | ||
685 | if (socket_name && !index (socket_name, '/') && !index (socket_name, '\\')) | |
686 | { /* socket_name is a file name component. */ | |
687 | server_name = socket_name; | |
688 | socket_name = NULL; | |
689 | default_sock = 1; /* Try both UIDs. */ | |
690 | } | |
efb859b4 | 691 | |
5c9659d3 | 692 | if (default_sock) |
254107e4 | 693 | { |
0734b0d0 SM |
694 | socket_name = alloca (100 + strlen (server_name)); |
695 | sprintf (socket_name, "/tmp/emacs%d/%s", | |
696 | (int) geteuid (), server_name); | |
254107e4 RS |
697 | } |
698 | ||
699 | if (strlen (socket_name) < sizeof (server.sun_path)) | |
700 | strcpy (server.sun_path, socket_name); | |
701 | else | |
5c9659d3 | 702 | { |
42073bfb | 703 | message (TRUE, "%s: socket-name %s too long", |
aa0b6932 | 704 | progname, socket_name); |
65396510 | 705 | exit (EXIT_FAILURE); |
5c9659d3 | 706 | } |
efb859b4 | 707 | |
9f637eea GM |
708 | /* See if the socket exists, and if it's owned by us. */ |
709 | sock_status = socket_status (server.sun_path); | |
152b6e83 | 710 | saved_errno = errno; |
5c9659d3 | 711 | if (sock_status && default_sock) |
efb859b4 | 712 | { |
9f637eea GM |
713 | /* Failing that, see if LOGNAME or USER exist and differ from |
714 | our euid. If so, look for a socket based on the UID | |
715 | associated with the name. This is reminiscent of the logic | |
716 | that init_editfns uses to set the global Vuser_full_name. */ | |
e69233c2 | 717 | |
9f637eea | 718 | char *user_name = (char *) getenv ("LOGNAME"); |
293f9f2a | 719 | |
9f637eea GM |
720 | if (!user_name) |
721 | user_name = (char *) getenv ("USER"); | |
e69233c2 | 722 | |
9f637eea GM |
723 | if (user_name) |
724 | { | |
725 | struct passwd *pw = getpwnam (user_name); | |
293f9f2a | 726 | |
9f637eea GM |
727 | if (pw && (pw->pw_uid != geteuid ())) |
728 | { | |
729 | /* We're running under su, apparently. */ | |
0734b0d0 SM |
730 | socket_name = alloca (100 + strlen (server_name)); |
731 | sprintf (socket_name, "/tmp/emacs%d/%s", | |
732 | (int) pw->pw_uid, server_name); | |
5c9659d3 SM |
733 | |
734 | if (strlen (socket_name) < sizeof (server.sun_path)) | |
735 | strcpy (server.sun_path, socket_name); | |
736 | else | |
737 | { | |
42073bfb | 738 | message (TRUE, "%s: socket-name %s too long", |
aa0b6932 | 739 | progname, socket_name); |
65396510 | 740 | exit (EXIT_FAILURE); |
5c9659d3 SM |
741 | } |
742 | ||
9f637eea | 743 | sock_status = socket_status (server.sun_path); |
152b6e83 | 744 | saved_errno = errno; |
9f637eea | 745 | } |
293f9f2a RS |
746 | else |
747 | errno = saved_errno; | |
9f637eea | 748 | } |
efb859b4 | 749 | } |
e69233c2 | 750 | |
aa0b6932 JB |
751 | switch (sock_status) |
752 | { | |
753 | case 1: | |
754 | /* There's a socket, but it isn't owned by us. This is OK if | |
755 | we are root. */ | |
756 | if (0 != geteuid ()) | |
757 | { | |
42073bfb | 758 | message (TRUE, "%s: Invalid socket owner\n", progname); |
aa0b6932 JB |
759 | return INVALID_SOCKET; |
760 | } | |
761 | break; | |
762 | ||
763 | case 2: | |
764 | /* `stat' failed */ | |
765 | if (saved_errno == ENOENT) | |
42073bfb | 766 | message (TRUE, |
aa0b6932 | 767 | "%s: can't find socket; have you started the server?\n\ |
45adde32 | 768 | To start the server in Emacs, type \"M-x server-start\".\n", |
aa0b6932 JB |
769 | progname); |
770 | else | |
42073bfb | 771 | message (TRUE, "%s: can't stat %s: %s\n", |
aa0b6932 | 772 | progname, server.sun_path, strerror (saved_errno)); |
b03d27bd | 773 | return INVALID_SOCKET; |
aa0b6932 | 774 | } |
efb859b4 | 775 | } |
46cec291 | 776 | |
4e23f2ba JB |
777 | if (connect (s, (struct sockaddr *) &server, strlen (server.sun_path) + 2) |
778 | < 0) | |
46cec291 | 779 | { |
42073bfb | 780 | message (TRUE, "%s: connect: %s\n", progname, strerror (errno)); |
aa0b6932 | 781 | return INVALID_SOCKET; |
46cec291 | 782 | } |
23a7488d | 783 | |
aa0b6932 JB |
784 | return s; |
785 | } | |
786 | #endif /* ! NO_SOCKETS_IN_FILE_SYSTEM */ | |
787 | ||
788 | HSOCKET | |
789 | set_socket () | |
790 | { | |
b03d27bd JB |
791 | HSOCKET s; |
792 | ||
793 | INITIALIZE (); | |
794 | ||
aa0b6932 | 795 | #ifndef NO_SOCKETS_IN_FILE_SYSTEM |
b03d27bd JB |
796 | /* Explicit --socket-name argument. */ |
797 | if (socket_name) | |
798 | { | |
799 | s = set_local_socket (); | |
800 | if ((s != INVALID_SOCKET) || alternate_editor) | |
801 | return s; | |
802 | ||
42073bfb | 803 | message (TRUE, "%s: error accessing socket \"%s\"", |
b03d27bd JB |
804 | progname, socket_name); |
805 | exit (EXIT_FAILURE); | |
806 | } | |
807 | #endif | |
808 | ||
809 | /* Explicit --server-file arg or EMACS_SERVER_FILE variable. */ | |
810 | if (!server_file) | |
811 | server_file = getenv ("EMACS_SERVER_FILE"); | |
812 | ||
813 | if (server_file) | |
46cec291 | 814 | { |
b03d27bd JB |
815 | s = set_tcp_socket (); |
816 | if ((s != INVALID_SOCKET) || alternate_editor) | |
817 | return s; | |
818 | ||
42073bfb | 819 | message (TRUE, "%s: error accessing server file \"%s\"", |
b03d27bd JB |
820 | progname, server_file); |
821 | exit (EXIT_FAILURE); | |
46cec291 | 822 | } |
b03d27bd JB |
823 | |
824 | #ifndef NO_SOCKETS_IN_FILE_SYSTEM | |
825 | /* Implicit local socket. */ | |
826 | s = set_local_socket (); | |
827 | if (s != INVALID_SOCKET) | |
828 | return s; | |
829 | #endif | |
830 | ||
831 | /* Implicit server file. */ | |
832 | server_file = "server"; | |
833 | s = set_tcp_socket (); | |
834 | if ((s != INVALID_SOCKET) || alternate_editor) | |
835 | return s; | |
836 | ||
837 | /* No implicit or explicit socket, and no alternate editor. */ | |
42073bfb | 838 | message (TRUE, "%s: No socket or alternate editor. Please use:\n\n" |
b03d27bd JB |
839 | #ifndef NO_SOCKETS_IN_FILE_SYSTEM |
840 | "\t--socket-name\n" | |
aa0b6932 | 841 | #endif |
b03d27bd JB |
842 | "\t--server-file (or environment variable EMACS_SERVER_FILE)\n\ |
843 | \t--alternate-editor (or environment variable ALTERNATE_EDITOR)\n", | |
844 | progname); | |
845 | exit (EXIT_FAILURE); | |
aa0b6932 | 846 | } |
46cec291 | 847 | |
0e0dced5 JB |
848 | #ifdef WINDOWSNT |
849 | FARPROC set_fg; /* Pointer to AllowSetForegroundWindow. */ | |
850 | FARPROC get_wc; /* Pointer to RealGetWindowClassA. */ | |
851 | ||
852 | BOOL CALLBACK | |
853 | w32_find_emacs_process (hWnd, lParam) | |
854 | HWND hWnd; | |
855 | LPARAM lParam; | |
856 | { | |
857 | DWORD pid; | |
858 | char class[6]; | |
859 | ||
860 | /* Reject any window not of class "Emacs". */ | |
861 | if (! get_wc (hWnd, class, sizeof (class)) | |
862 | || strcmp (class, "Emacs")) | |
863 | return TRUE; | |
864 | ||
865 | /* We only need the process id, not the thread id. */ | |
866 | (void) GetWindowThreadProcessId (hWnd, &pid); | |
867 | ||
868 | /* Not the one we're looking for. */ | |
869 | if (pid != (DWORD) emacs_pid) return TRUE; | |
870 | ||
871 | /* OK, let's raise it. */ | |
872 | set_fg (emacs_pid); | |
873 | ||
874 | /* Stop enumeration. */ | |
875 | return FALSE; | |
876 | } | |
877 | ||
878 | /* | |
879 | * Search for a window of class "Emacs" and owned by a process with | |
880 | * process id = emacs_pid. If found, allow it to grab the focus. | |
881 | */ | |
882 | void | |
883 | w32_give_focus () | |
884 | { | |
885 | HMODULE hUser32; | |
886 | ||
887 | /* It should'nt happen when dealing with TCP sockets. */ | |
888 | if (!emacs_pid) return; | |
889 | ||
890 | if (!(hUser32 = LoadLibrary ("user32.dll"))) return; | |
891 | ||
892 | /* Modern Windows restrict which processes can set the foreground window. | |
893 | emacsclient can allow Emacs to grab the focus by calling the function | |
894 | AllowSetForegroundWindow. Unfortunately, older Windows (W95, W98 and | |
895 | NT) lack this function, so we have to check its availability. */ | |
896 | if ((set_fg = GetProcAddress (hUser32, "AllowSetForegroundWindow")) | |
897 | && (get_wc = GetProcAddress (hUser32, "RealGetWindowClassA"))) | |
898 | EnumWindows (w32_find_emacs_process, (LPARAM) 0); | |
899 | ||
900 | FreeLibrary (hUser32); | |
901 | } | |
902 | #endif | |
903 | ||
aa0b6932 JB |
904 | int |
905 | main (argc, argv) | |
906 | int argc; | |
907 | char **argv; | |
908 | { | |
909 | HSOCKET s; | |
910 | int i, rl, needlf = 0; | |
911 | char *cwd; | |
912 | char string[BUFSIZ+1]; | |
913 | ||
914 | progname = argv[0]; | |
915 | ||
916 | /* Process options. */ | |
917 | decode_options (argc, argv); | |
918 | ||
919 | if ((argc - optind < 1) && !eval) | |
23a7488d | 920 | { |
42073bfb JB |
921 | message (TRUE, "%s: file name or argument required\nTry `%s --help' for more information\n", |
922 | progname, progname); | |
aa0b6932 | 923 | exit (EXIT_FAILURE); |
23a7488d RS |
924 | } |
925 | ||
aa0b6932 JB |
926 | if ((s = set_socket ()) == INVALID_SOCKET) |
927 | fail (argc, argv); | |
928 | ||
38732dba | 929 | #ifdef HAVE_GETCWD |
ee6a193c | 930 | cwd = getcwd (string, sizeof string); |
38732dba RS |
931 | #else |
932 | cwd = getwd (string); | |
ee6a193c | 933 | #endif |
46cec291 RS |
934 | if (cwd == 0) |
935 | { | |
936 | /* getwd puts message in STRING if it fails. */ | |
42073bfb | 937 | message (TRUE, "%s: %s (%s)\n", progname, |
c66648e0 JB |
938 | #ifdef HAVE_GETCWD |
939 | "Cannot get current working directory", | |
38732dba | 940 | #else |
c66648e0 | 941 | string, |
bd252662 | 942 | #endif |
c66648e0 | 943 | strerror (errno)); |
97e3214d | 944 | fail (argc, argv); |
46cec291 RS |
945 | } |
946 | ||
c66648e0 | 947 | #ifdef WINDOWSNT |
0e0dced5 | 948 | w32_give_focus (); |
c66648e0 JB |
949 | #endif |
950 | ||
5212210c | 951 | if (nowait) |
aa0b6932 | 952 | SEND_STRING ("-nowait "); |
292d74a3 | 953 | |
30be2360 | 954 | if (eval) |
aa0b6932 | 955 | SEND_STRING ("-eval "); |
30be2360 SM |
956 | |
957 | if (display) | |
87209357 | 958 | { |
aa0b6932 JB |
959 | SEND_STRING ("-display "); |
960 | SEND_QUOTED (display); | |
961 | SEND_STRING (" "); | |
87209357 | 962 | } |
30be2360 | 963 | |
87209357 | 964 | if ((argc - optind > 0)) |
5212210c | 965 | { |
87209357 | 966 | for (i = optind; i < argc; i++) |
46cec291 | 967 | { |
87209357 EZ |
968 | if (eval) |
969 | ; /* Don't prepend any cwd or anything like that. */ | |
970 | else if (*argv[i] == '+') | |
971 | { | |
972 | char *p = argv[i] + 1; | |
973 | while (isdigit ((unsigned char) *p) || *p == ':') p++; | |
974 | if (*p != 0) | |
975 | { | |
aa0b6932 JB |
976 | SEND_QUOTED (cwd); |
977 | SEND_STRING ("/"); | |
87209357 EZ |
978 | } |
979 | } | |
b03d27bd | 980 | else if (! file_name_absolute_p (argv[i])) |
87209357 | 981 | { |
aa0b6932 JB |
982 | SEND_QUOTED (cwd); |
983 | SEND_STRING ("/"); | |
87209357 EZ |
984 | } |
985 | ||
aa0b6932 JB |
986 | SEND_QUOTED (argv[i]); |
987 | SEND_STRING (" "); | |
46cec291 | 988 | } |
46cec291 | 989 | } |
87209357 EZ |
990 | else |
991 | { | |
aa0b6932 | 992 | while (fgets (string, BUFSIZ, stdin)) |
87209357 | 993 | { |
aa0b6932 | 994 | SEND_QUOTED (string); |
87209357 | 995 | } |
aa0b6932 | 996 | SEND_STRING (" "); |
87209357 | 997 | } |
65396510 | 998 | |
aa0b6932 | 999 | SEND_STRING ("\n"); |
46cec291 | 1000 | |
292d74a3 | 1001 | /* Maybe wait for an answer. */ |
aa0b6932 | 1002 | if (!nowait) |
30be2360 | 1003 | { |
aa0b6932 JB |
1004 | if (!eval) |
1005 | { | |
1006 | printf ("Waiting for Emacs..."); | |
1007 | needlf = 2; | |
1008 | } | |
1009 | fflush (stdout); | |
1010 | ||
1011 | /* Now, wait for an answer and print any messages. */ | |
1012 | while ((rl = recv (s, string, BUFSIZ, 0)) > 0) | |
1013 | { | |
1014 | string[rl] = '\0'; | |
1015 | if (needlf == 2) | |
1016 | printf ("\n"); | |
1017 | printf ("%s", string); | |
1018 | needlf = string[0] == '\0' ? needlf : string[strlen (string) - 1] != '\n'; | |
1019 | } | |
1020 | ||
1021 | if (needlf) | |
1022 | printf ("\n"); | |
1023 | fflush (stdout); | |
30be2360 | 1024 | } |
23a7488d | 1025 | |
aa0b6932 | 1026 | CLOSE_SOCKET (s); |
65396510 | 1027 | return EXIT_SUCCESS; |
46cec291 RS |
1028 | } |
1029 | ||
1e7823d0 | 1030 | #endif /* HAVE_SOCKETS && HAVE_INET_SOCKETS */ |
aa0b6932 | 1031 | |
27711600 RM |
1032 | #ifndef HAVE_STRERROR |
1033 | char * | |
1034 | strerror (errnum) | |
1035 | int errnum; | |
1036 | { | |
1037 | extern char *sys_errlist[]; | |
1038 | extern int sys_nerr; | |
1039 | ||
1040 | if (errnum >= 0 && errnum < sys_nerr) | |
1041 | return sys_errlist[errnum]; | |
1042 | return (char *) "Unknown error"; | |
1043 | } | |
1044 | ||
1045 | #endif /* ! HAVE_STRERROR */ | |
ab5796a9 MB |
1046 | |
1047 | /* arch-tag: f39bb9c4-73eb-477e-896d-50832e2ca9a7 | |
1048 | (do not change this comment) */ | |
65396510 TTN |
1049 | |
1050 | /* emacsclient.c ends here */ |