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> | |
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 | ||
2381d38d | 132 | void print_help_and_exit () NO_RETURN; |
7f3bff3e | 133 | |
8f9aaa0a RS |
134 | struct option longopts[] = |
135 | { | |
749ae770 | 136 | { "no-wait", no_argument, NULL, 'n' }, |
30be2360 | 137 | { "eval", no_argument, NULL, 'e' }, |
8f9aaa0a RS |
138 | { "help", no_argument, NULL, 'H' }, |
139 | { "version", no_argument, NULL, 'V' }, | |
3cf8c6aa | 140 | { "alternate-editor", required_argument, NULL, 'a' }, |
b03d27bd | 141 | #ifndef NO_SOCKETS_IN_FILE_SYSTEM |
254107e4 | 142 | { "socket-name", required_argument, NULL, 's' }, |
b03d27bd | 143 | #endif |
aa0b6932 | 144 | { "server-file", required_argument, NULL, 'f' }, |
30be2360 SM |
145 | { "display", required_argument, NULL, 'd' }, |
146 | { 0, 0, 0, 0 } | |
8f9aaa0a RS |
147 | }; |
148 | ||
42073bfb JB |
149 | /* Message functions. */ |
150 | ||
151 | #ifdef WINDOWSNT | |
152 | /* I first tried to check for STDOUT. The check did not work, | |
153 | I get a valid handle also in nonconsole apps. | |
154 | Instead I test for console title, which seems to work. */ | |
155 | int | |
156 | w32_window_app() | |
157 | { | |
158 | static int window_app = -1; | |
159 | char szTitle[MAX_PATH]; | |
160 | ||
161 | if (window_app < 0) | |
162 | window_app = (GetConsoleTitleA (szTitle, MAX_PATH) == 0); | |
163 | ||
164 | return window_app; | |
165 | } | |
166 | #endif | |
167 | ||
168 | void | |
169 | message (int is_error, char *message, ...) | |
170 | { | |
171 | char buf [2048]; | |
172 | char *msg = buf; | |
173 | va_list args; | |
174 | ||
175 | va_start (args, message); | |
176 | ||
177 | if (is_error) | |
178 | { | |
179 | sprintf (buf, "%s: ", progname); | |
180 | msg = strchr (buf, '\0'); | |
181 | } | |
182 | ||
183 | vsprintf (msg, message, args); | |
184 | va_end (args); | |
185 | ||
186 | #ifdef WINDOWSNT | |
187 | if (w32_window_app ()) | |
188 | { | |
189 | if (is_error) | |
190 | MessageBox (NULL, msg, "Emacsclient ERROR", MB_ICONERROR); | |
191 | else | |
192 | MessageBox (NULL, msg, "Emacsclient", MB_ICONINFORMATION); | |
193 | } | |
194 | else | |
195 | #endif | |
196 | fprintf (is_error ? stderr : stdout, msg); | |
197 | } | |
198 | ||
8f9aaa0a | 199 | /* Decode the options from argv and argc. |
5212210c | 200 | The global variable `optind' will say how many arguments we used up. */ |
8f9aaa0a | 201 | |
5212210c | 202 | void |
8f9aaa0a RS |
203 | decode_options (argc, argv) |
204 | int argc; | |
205 | char **argv; | |
206 | { | |
b6b6d6d2 SM |
207 | alternate_editor = getenv ("ALTERNATE_EDITOR"); |
208 | ||
8f9aaa0a RS |
209 | while (1) |
210 | { | |
211 | int opt = getopt_long (argc, argv, | |
b03d27bd JB |
212 | #ifndef NO_SOCKETS_IN_FILE_SYSTEM |
213 | "VHnea:s:f:d:", | |
214 | #else | |
215 | "VHnea:f:d:", | |
216 | #endif | |
217 | longopts, 0); | |
8f9aaa0a RS |
218 | |
219 | if (opt == EOF) | |
220 | break; | |
221 | ||
222 | switch (opt) | |
223 | { | |
224 | case 0: | |
225 | /* If getopt returns 0, then it has already processed a | |
226 | long-named option. We should do nothing. */ | |
227 | break; | |
e69233c2 | 228 | |
97e3214d GM |
229 | case 'a': |
230 | alternate_editor = optarg; | |
231 | break; | |
e69233c2 | 232 | |
b03d27bd | 233 | #ifndef NO_SOCKETS_IN_FILE_SYSTEM |
254107e4 RS |
234 | case 's': |
235 | socket_name = optarg; | |
236 | break; | |
b03d27bd | 237 | #endif |
254107e4 | 238 | |
aa0b6932 JB |
239 | case 'f': |
240 | server_file = optarg; | |
241 | break; | |
242 | ||
30be2360 SM |
243 | case 'd': |
244 | display = optarg; | |
245 | break; | |
246 | ||
8f9aaa0a RS |
247 | case 'n': |
248 | nowait = 1; | |
249 | break; | |
250 | ||
30be2360 SM |
251 | case 'e': |
252 | eval = 1; | |
253 | break; | |
254 | ||
8f9aaa0a | 255 | case 'V': |
42073bfb | 256 | message (FALSE, "emacsclient %s\n", VERSION); |
65396510 | 257 | exit (EXIT_SUCCESS); |
8f9aaa0a | 258 | break; |
46cec291 | 259 | |
8f9aaa0a | 260 | case 'H': |
8f9aaa0a | 261 | print_help_and_exit (); |
20c396e8 JB |
262 | break; |
263 | ||
264 | default: | |
42073bfb | 265 | message (TRUE, "Try `%s --help' for more information\n", progname); |
65396510 | 266 | exit (EXIT_FAILURE); |
20c396e8 | 267 | break; |
8f9aaa0a RS |
268 | } |
269 | } | |
8f9aaa0a RS |
270 | } |
271 | ||
7f3bff3e | 272 | void |
8f9aaa0a RS |
273 | print_help_and_exit () |
274 | { | |
42073bfb | 275 | message (FALSE, |
20c396e8 | 276 | "Usage: %s [OPTIONS] FILE...\n\ |
30be2360 SM |
277 | Tell the Emacs server to visit the specified files.\n\ |
278 | Every FILE can be either just a FILENAME or [+LINE[:COLUMN]] FILENAME.\n\ | |
20c396e8 | 279 | \n\ |
30be2360 | 280 | The following OPTIONS are accepted:\n\ |
30aa95ce JB |
281 | \n\ |
282 | -V, --version Just print version info and return\n\ | |
283 | -H, --help Print this usage information message\n\ | |
284 | -e, --eval Evaluate FILE arguments as Lisp expressions\n\ | |
285 | -n, --no-wait Don't wait for the server to return\n\ | |
286 | -d, --display=DISPLAY Visit the file in the given display\n" | |
aa0b6932 JB |
287 | #ifndef NO_SOCKETS_IN_FILE_SYSTEM |
288 | "-s, --socket-name=FILENAME\n\ | |
30aa95ce | 289 | Set filename of the UNIX socket for communication\n" |
aa0b6932 JB |
290 | #endif |
291 | "-f, --server-file=FILENAME\n\ | |
30aa95ce | 292 | Set filename of the TCP authentication file\n\ |
30be2360 | 293 | -a, --alternate-editor=EDITOR\n\ |
30aa95ce | 294 | Editor to fallback to if server is not running\n\ |
20c396e8 | 295 | \n\ |
30be2360 | 296 | Report bugs to bug-gnu-emacs@gnu.org.\n", progname); |
65396510 | 297 | exit (EXIT_SUCCESS); |
8f9aaa0a | 298 | } |
5212210c | 299 | |
aa0b6932 JB |
300 | \f |
301 | /* | |
302 | Try to run a different command, or --if no alternate editor is | |
303 | defined-- exit with an errorcode. | |
304 | */ | |
305 | void | |
306 | fail (argc, argv) | |
307 | int argc; | |
308 | char **argv; | |
309 | { | |
310 | if (alternate_editor) | |
311 | { | |
312 | int i = optind - 1; | |
b73ea44b JB |
313 | #ifdef WINDOWSNT |
314 | argv[i] = (char *)alternate_editor; | |
315 | #endif | |
aa0b6932 | 316 | execvp (alternate_editor, argv + i); |
42073bfb | 317 | message (TRUE, "%s: error executing alternate editor \"%s\"\n", |
aa0b6932 JB |
318 | progname, alternate_editor); |
319 | } | |
aa0b6932 JB |
320 | exit (EXIT_FAILURE); |
321 | } | |
322 | ||
323 | \f | |
1e7823d0 | 324 | #if !defined (HAVE_SOCKETS) || !defined (HAVE_INET_SOCKETS) |
aa0b6932 JB |
325 | |
326 | int | |
327 | main (argc, argv) | |
328 | int argc; | |
329 | char **argv; | |
330 | { | |
42073bfb | 331 | message (TRUE, "%s: Sorry, the Emacs server is supported only\non systems with Berkely sockets.\n", |
aa0b6932 | 332 | argv[0]); |
aa0b6932 JB |
333 | |
334 | fail (argc, argv); | |
335 | } | |
336 | ||
1e7823d0 | 337 | #else /* HAVE_SOCKETS && HAVE_INET_SOCKETS */ |
aa0b6932 JB |
338 | |
339 | #ifdef WINDOWSNT | |
340 | # include <winsock2.h> | |
341 | #else | |
342 | # include <sys/types.h> | |
343 | # include <sys/socket.h> | |
344 | # include <sys/un.h> | |
345 | # include <sys/stat.h> | |
346 | # include <errno.h> | |
347 | #endif | |
348 | ||
349 | #define AUTH_KEY_LENGTH 64 | |
350 | #define SEND_BUFFER_SIZE 4096 | |
351 | ||
352 | extern char *strerror (); | |
353 | extern int errno; | |
354 | ||
355 | /* Buffer to accumulate data to send in TCP connections. */ | |
356 | char send_buffer[SEND_BUFFER_SIZE + 1]; | |
357 | int sblen = 0; /* Fill pointer for the send buffer. */ | |
358 | ||
359 | /* Let's send the data to Emacs when either | |
360 | - the data ends in "\n", or | |
361 | - the buffer is full (but this shouldn't happen) | |
362 | Otherwise, we just accumulate it. */ | |
b03d27bd JB |
363 | void |
364 | send_to_emacs (s, data) | |
aa0b6932 JB |
365 | HSOCKET s; |
366 | char *data; | |
367 | { | |
368 | while (data) | |
369 | { | |
370 | int dlen = strlen (data); | |
371 | if (dlen + sblen >= SEND_BUFFER_SIZE) | |
372 | { | |
373 | int part = SEND_BUFFER_SIZE - sblen; | |
374 | strncpy (&send_buffer[sblen], data, part); | |
375 | data += part; | |
376 | sblen = SEND_BUFFER_SIZE; | |
377 | } | |
378 | else if (dlen) | |
379 | { | |
380 | strcpy (&send_buffer[sblen], data); | |
381 | data = NULL; | |
382 | sblen += dlen; | |
383 | } | |
384 | else | |
385 | break; | |
386 | ||
387 | if (sblen == SEND_BUFFER_SIZE | |
388 | || (sblen > 0 && send_buffer[sblen-1] == '\n')) | |
389 | { | |
390 | int sent = send (s, send_buffer, sblen, 0); | |
391 | if (sent != sblen) | |
392 | strcpy (send_buffer, &send_buffer[sent]); | |
393 | sblen -= sent; | |
394 | } | |
395 | } | |
396 | } | |
397 | ||
a4cf2096 RS |
398 | /* In NAME, insert a & before each &, each space, each newline, and |
399 | any initial -. Change spaces to underscores, too, so that the | |
5212210c | 400 | return value never contains a space. */ |
87209357 | 401 | void |
aa0b6932 JB |
402 | quote_file_name (s, name) |
403 | HSOCKET s; | |
5212210c RS |
404 | char *name; |
405 | { | |
406 | char *copy = (char *) malloc (strlen (name) * 2 + 1); | |
407 | char *p, *q; | |
408 | ||
409 | p = name; | |
410 | q = copy; | |
411 | while (*p) | |
412 | { | |
413 | if (*p == ' ') | |
414 | { | |
f1db6a73 | 415 | *q++ = '&'; |
5212210c RS |
416 | *q++ = '_'; |
417 | p++; | |
418 | } | |
3cf8c6aa SM |
419 | else if (*p == '\n') |
420 | { | |
421 | *q++ = '&'; | |
422 | *q++ = 'n'; | |
423 | p++; | |
424 | } | |
5212210c RS |
425 | else |
426 | { | |
f1db6a73 RS |
427 | if (*p == '&' || (*p == '-' && p == name)) |
428 | *q++ = '&'; | |
5212210c RS |
429 | *q++ = *p++; |
430 | } | |
431 | } | |
f1db6a73 | 432 | *q++ = 0; |
5212210c | 433 | |
aa0b6932 | 434 | SEND_STRING (copy); |
87209357 EZ |
435 | |
436 | free (copy); | |
5212210c | 437 | } |
0c76956f | 438 | |
b03d27bd JB |
439 | int |
440 | file_name_absolute_p (filename) | |
441 | const unsigned char *filename; | |
442 | { | |
443 | /* Sanity check, it shouldn't happen. */ | |
444 | if (! filename) return FALSE; | |
445 | ||
446 | /* /xxx is always an absolute path. */ | |
447 | if (filename[0] == '/') return TRUE; | |
448 | ||
449 | /* Empty filenames (which shouldn't happen) are relative. */ | |
450 | if (filename[0] == '\0') return FALSE; | |
451 | ||
452 | #ifdef WINDOWSNT | |
453 | /* X:\xxx is always absolute; X:xxx is an error and will fail. */ | |
5f7a4874 | 454 | if (isalpha (filename[0]) |
cb0297bb | 455 | && filename[1] == ':' && (filename[2] == '\\' || filename[2] == '/')) |
b03d27bd JB |
456 | return TRUE; |
457 | ||
458 | /* Both \xxx and \\xxx\yyy are absolute. */ | |
459 | if (filename[0] == '\\') return TRUE; | |
460 | #endif | |
461 | ||
462 | return FALSE; | |
463 | } | |
464 | ||
aa0b6932 | 465 | #ifdef WINDOWSNT |
db9cd97a | 466 | /* Wrapper to make WSACleanup a cdecl, as required by atexit(). */ |
b03d27bd JB |
467 | void |
468 | __cdecl close_winsock () | |
aa0b6932 JB |
469 | { |
470 | WSACleanup (); | |
471 | } | |
0c76956f | 472 | |
b03d27bd JB |
473 | /* Initialize the WinSock2 library. */ |
474 | void | |
475 | initialize_sockets () | |
0c76956f | 476 | { |
aa0b6932 JB |
477 | WSADATA wsaData; |
478 | ||
aa0b6932 JB |
479 | if (WSAStartup (MAKEWORD (2, 0), &wsaData)) |
480 | { | |
42073bfb | 481 | message (TRUE, "%s: error initializing WinSock2", progname); |
aa0b6932 JB |
482 | exit (EXIT_FAILURE); |
483 | } | |
484 | ||
485 | atexit (close_winsock); | |
0c76956f | 486 | } |
e35fc962 | 487 | #endif /* WINDOWSNT */ |
8f9aaa0a | 488 | \f |
97e3214d | 489 | /* |
aa0b6932 | 490 | * Read the information needed to set up a TCP comm channel with |
434a6c5d | 491 | * the Emacs server: host, port, pid and authentication string. |
97e3214d | 492 | */ |
b03d27bd JB |
493 | int |
494 | get_server_config (server, authentication) | |
aa0b6932 JB |
495 | struct sockaddr_in *server; |
496 | char *authentication; | |
97e3214d | 497 | { |
aa0b6932 JB |
498 | char dotted[32]; |
499 | char *port; | |
434a6c5d | 500 | char *pid; |
b03d27bd | 501 | FILE *config = NULL; |
aa0b6932 | 502 | |
b03d27bd JB |
503 | if (file_name_absolute_p (server_file)) |
504 | config = fopen (server_file, "rb"); | |
505 | else | |
97e3214d | 506 | { |
aa0b6932 | 507 | char *home = getenv ("HOME"); |
88b46d84 | 508 | |
aa0b6932 JB |
509 | if (home) |
510 | { | |
511 | char *path = alloca (32 + strlen (home) + strlen (server_file)); | |
512 | sprintf (path, "%s/.emacs.d/server/%s", home, server_file); | |
513 | config = fopen (path, "rb"); | |
514 | } | |
88b46d84 JB |
515 | #ifdef WINDOWSNT |
516 | if (!config && (home = getenv ("APPDATA"))) | |
517 | { | |
518 | char *path = alloca (32 + strlen (home) + strlen (server_file)); | |
519 | sprintf (path, "%s/.emacs.d/server/%s", home, server_file); | |
520 | config = fopen (path, "rb"); | |
521 | } | |
522 | #endif | |
aa0b6932 JB |
523 | } |
524 | ||
525 | if (! config) | |
526 | return FALSE; | |
527 | ||
528 | if (fgets (dotted, sizeof dotted, config) | |
434a6c5d JB |
529 | && (port = strchr (dotted, ':')) |
530 | && (pid = strchr (port, ' '))) | |
aa0b6932 JB |
531 | { |
532 | *port++ = '\0'; | |
434a6c5d | 533 | *pid++ = '\0'; |
97e3214d GM |
534 | } |
535 | else | |
536 | { | |
42073bfb | 537 | message (TRUE, "%s: invalid configuration info", progname); |
65396510 | 538 | exit (EXIT_FAILURE); |
97e3214d | 539 | } |
97e3214d | 540 | |
aa0b6932 JB |
541 | server->sin_family = AF_INET; |
542 | server->sin_addr.s_addr = inet_addr (dotted); | |
543 | server->sin_port = htons (atoi (port)); | |
97e3214d | 544 | |
aa0b6932 JB |
545 | if (! fread (authentication, AUTH_KEY_LENGTH, 1, config)) |
546 | { | |
42073bfb | 547 | message (TRUE, "%s: cannot read authentication info", progname); |
aa0b6932 JB |
548 | exit (EXIT_FAILURE); |
549 | } | |
46cec291 | 550 | |
aa0b6932 | 551 | fclose (config); |
97e3214d | 552 | |
434a6c5d JB |
553 | #ifdef WINDOWSNT |
554 | /* | |
555 | Modern Windows restrict which processes can set the foreground window. | |
556 | So, for emacsclient to be able to force Emacs into the foreground, we | |
557 | have to call AllowSetForegroundWindow(). Unfortunately, older Windows | |
558 | (W95, W98 and NT) don't have this function, so we have to check first. | |
559 | ||
560 | We're doing this here because it has to be done before sending info | |
561 | to Emacs, and otherwise we'll need a global variable just to pass around | |
562 | the pid, which is also inelegant. | |
563 | */ | |
564 | { | |
565 | HMODULE hUser32; | |
566 | ||
567 | if (hUser32 = LoadLibrary ("user32.dll")) | |
568 | { | |
2dc07a12 | 569 | FARPROC set_fg; |
434a6c5d JB |
570 | if (set_fg = GetProcAddress (hUser32, "AllowSetForegroundWindow")) |
571 | set_fg (atoi (pid)); | |
572 | FreeLibrary (hUser32); | |
573 | } | |
574 | } | |
575 | #endif | |
576 | ||
aa0b6932 | 577 | return TRUE; |
46cec291 RS |
578 | } |
579 | ||
aa0b6932 JB |
580 | HSOCKET |
581 | set_tcp_socket () | |
582 | { | |
583 | HSOCKET s; | |
584 | struct sockaddr_in server; | |
aa0b6932 JB |
585 | struct linger l_arg = {1, 1}; |
586 | char auth_string[AUTH_KEY_LENGTH + 1]; | |
46cec291 | 587 | |
aa0b6932 JB |
588 | if (! get_server_config (&server, auth_string)) |
589 | return INVALID_SOCKET; | |
590 | ||
b03d27bd | 591 | if (server.sin_addr.s_addr != inet_addr ("127.0.0.1")) |
42073bfb | 592 | message (TRUE, "%s: connected to remote socket at %s\n", |
b03d27bd JB |
593 | progname, inet_ntoa (server.sin_addr)); |
594 | ||
aa0b6932 JB |
595 | /* |
596 | * Open up an AF_INET socket | |
597 | */ | |
598 | if ((s = socket (AF_INET, SOCK_STREAM, IPPROTO_TCP)) < 0) | |
599 | { | |
42073bfb | 600 | message (TRUE, "%s: socket: %s\n", progname, strerror (errno)); |
aa0b6932 JB |
601 | return INVALID_SOCKET; |
602 | } | |
603 | ||
604 | /* | |
605 | * Set up the socket | |
606 | */ | |
607 | if (connect (s, (struct sockaddr *) &server, sizeof server) < 0) | |
608 | { | |
42073bfb | 609 | message (TRUE, "%s: connect: %s\n", progname, strerror (errno)); |
aa0b6932 JB |
610 | return INVALID_SOCKET; |
611 | } | |
612 | ||
aa0b6932 JB |
613 | setsockopt (s, SOL_SOCKET, SO_LINGER, (char *) &l_arg, sizeof l_arg); |
614 | ||
615 | /* | |
616 | * Send the authentication | |
617 | */ | |
618 | auth_string[AUTH_KEY_LENGTH] = '\0'; | |
619 | ||
620 | SEND_STRING ("-auth "); | |
621 | SEND_STRING (auth_string); | |
622 | SEND_STRING ("\n"); | |
623 | ||
624 | return s; | |
625 | } | |
626 | ||
627 | #if !defined (NO_SOCKETS_IN_FILE_SYSTEM) | |
46cec291 | 628 | |
9f637eea GM |
629 | /* Three possibilities: |
630 | 2 - can't be `stat'ed (sets errno) | |
631 | 1 - isn't owned by us | |
632 | 0 - success: none of the above */ | |
633 | ||
634 | static int | |
635 | socket_status (socket_name) | |
636 | char *socket_name; | |
637 | { | |
638 | struct stat statbfr; | |
639 | ||
640 | if (stat (socket_name, &statbfr) == -1) | |
641 | return 2; | |
642 | ||
643 | if (statbfr.st_uid != geteuid ()) | |
644 | return 1; | |
645 | ||
646 | return 0; | |
647 | } | |
648 | ||
aa0b6932 JB |
649 | HSOCKET |
650 | set_local_socket () | |
46cec291 | 651 | { |
aa0b6932 | 652 | HSOCKET s; |
46cec291 | 653 | struct sockaddr_un server; |
46cec291 | 654 | |
e69233c2 | 655 | /* |
46cec291 RS |
656 | * Open up an AF_UNIX socket in this person's home directory |
657 | */ | |
658 | ||
659 | if ((s = socket (AF_UNIX, SOCK_STREAM, 0)) < 0) | |
660 | { | |
42073bfb | 661 | message (TRUE, "%s: socket: %s\n", progname, strerror (errno)); |
aa0b6932 | 662 | return INVALID_SOCKET; |
46cec291 | 663 | } |
e69233c2 | 664 | |
46cec291 | 665 | server.sun_family = AF_UNIX; |
c5fee545 | 666 | |
c5fee545 | 667 | { |
9f637eea | 668 | int sock_status = 0; |
5c9659d3 | 669 | int default_sock = !socket_name; |
152b6e83 | 670 | int saved_errno; |
0734b0d0 SM |
671 | char *server_name = "server"; |
672 | ||
673 | if (socket_name && !index (socket_name, '/') && !index (socket_name, '\\')) | |
674 | { /* socket_name is a file name component. */ | |
675 | server_name = socket_name; | |
676 | socket_name = NULL; | |
677 | default_sock = 1; /* Try both UIDs. */ | |
678 | } | |
efb859b4 | 679 | |
5c9659d3 | 680 | if (default_sock) |
254107e4 | 681 | { |
0734b0d0 SM |
682 | socket_name = alloca (100 + strlen (server_name)); |
683 | sprintf (socket_name, "/tmp/emacs%d/%s", | |
684 | (int) geteuid (), server_name); | |
254107e4 RS |
685 | } |
686 | ||
687 | if (strlen (socket_name) < sizeof (server.sun_path)) | |
688 | strcpy (server.sun_path, socket_name); | |
689 | else | |
5c9659d3 | 690 | { |
42073bfb | 691 | message (TRUE, "%s: socket-name %s too long", |
aa0b6932 | 692 | progname, socket_name); |
65396510 | 693 | exit (EXIT_FAILURE); |
5c9659d3 | 694 | } |
efb859b4 | 695 | |
9f637eea GM |
696 | /* See if the socket exists, and if it's owned by us. */ |
697 | sock_status = socket_status (server.sun_path); | |
152b6e83 | 698 | saved_errno = errno; |
5c9659d3 | 699 | if (sock_status && default_sock) |
efb859b4 | 700 | { |
9f637eea GM |
701 | /* Failing that, see if LOGNAME or USER exist and differ from |
702 | our euid. If so, look for a socket based on the UID | |
703 | associated with the name. This is reminiscent of the logic | |
704 | that init_editfns uses to set the global Vuser_full_name. */ | |
e69233c2 | 705 | |
9f637eea | 706 | char *user_name = (char *) getenv ("LOGNAME"); |
293f9f2a | 707 | |
9f637eea GM |
708 | if (!user_name) |
709 | user_name = (char *) getenv ("USER"); | |
e69233c2 | 710 | |
9f637eea GM |
711 | if (user_name) |
712 | { | |
713 | struct passwd *pw = getpwnam (user_name); | |
293f9f2a | 714 | |
9f637eea GM |
715 | if (pw && (pw->pw_uid != geteuid ())) |
716 | { | |
717 | /* We're running under su, apparently. */ | |
0734b0d0 SM |
718 | socket_name = alloca (100 + strlen (server_name)); |
719 | sprintf (socket_name, "/tmp/emacs%d/%s", | |
720 | (int) pw->pw_uid, server_name); | |
5c9659d3 SM |
721 | |
722 | if (strlen (socket_name) < sizeof (server.sun_path)) | |
723 | strcpy (server.sun_path, socket_name); | |
724 | else | |
725 | { | |
42073bfb | 726 | message (TRUE, "%s: socket-name %s too long", |
aa0b6932 | 727 | progname, socket_name); |
65396510 | 728 | exit (EXIT_FAILURE); |
5c9659d3 SM |
729 | } |
730 | ||
9f637eea | 731 | sock_status = socket_status (server.sun_path); |
152b6e83 | 732 | saved_errno = errno; |
9f637eea | 733 | } |
293f9f2a RS |
734 | else |
735 | errno = saved_errno; | |
9f637eea | 736 | } |
efb859b4 | 737 | } |
e69233c2 | 738 | |
aa0b6932 JB |
739 | switch (sock_status) |
740 | { | |
741 | case 1: | |
742 | /* There's a socket, but it isn't owned by us. This is OK if | |
743 | we are root. */ | |
744 | if (0 != geteuid ()) | |
745 | { | |
42073bfb | 746 | message (TRUE, "%s: Invalid socket owner\n", progname); |
aa0b6932 JB |
747 | return INVALID_SOCKET; |
748 | } | |
749 | break; | |
750 | ||
751 | case 2: | |
752 | /* `stat' failed */ | |
753 | if (saved_errno == ENOENT) | |
42073bfb | 754 | message (TRUE, |
aa0b6932 | 755 | "%s: can't find socket; have you started the server?\n\ |
45adde32 | 756 | To start the server in Emacs, type \"M-x server-start\".\n", |
aa0b6932 JB |
757 | progname); |
758 | else | |
42073bfb | 759 | message (TRUE, "%s: can't stat %s: %s\n", |
aa0b6932 | 760 | progname, server.sun_path, strerror (saved_errno)); |
b03d27bd | 761 | return INVALID_SOCKET; |
aa0b6932 | 762 | } |
efb859b4 | 763 | } |
46cec291 | 764 | |
4e23f2ba JB |
765 | if (connect (s, (struct sockaddr *) &server, strlen (server.sun_path) + 2) |
766 | < 0) | |
46cec291 | 767 | { |
42073bfb | 768 | message (TRUE, "%s: connect: %s\n", progname, strerror (errno)); |
aa0b6932 | 769 | return INVALID_SOCKET; |
46cec291 | 770 | } |
23a7488d | 771 | |
aa0b6932 JB |
772 | return s; |
773 | } | |
774 | #endif /* ! NO_SOCKETS_IN_FILE_SYSTEM */ | |
775 | ||
776 | HSOCKET | |
777 | set_socket () | |
778 | { | |
b03d27bd JB |
779 | HSOCKET s; |
780 | ||
781 | INITIALIZE (); | |
782 | ||
aa0b6932 | 783 | #ifndef NO_SOCKETS_IN_FILE_SYSTEM |
b03d27bd JB |
784 | /* Explicit --socket-name argument. */ |
785 | if (socket_name) | |
786 | { | |
787 | s = set_local_socket (); | |
788 | if ((s != INVALID_SOCKET) || alternate_editor) | |
789 | return s; | |
790 | ||
42073bfb | 791 | message (TRUE, "%s: error accessing socket \"%s\"", |
b03d27bd JB |
792 | progname, socket_name); |
793 | exit (EXIT_FAILURE); | |
794 | } | |
795 | #endif | |
796 | ||
797 | /* Explicit --server-file arg or EMACS_SERVER_FILE variable. */ | |
798 | if (!server_file) | |
799 | server_file = getenv ("EMACS_SERVER_FILE"); | |
800 | ||
801 | if (server_file) | |
46cec291 | 802 | { |
b03d27bd JB |
803 | s = set_tcp_socket (); |
804 | if ((s != INVALID_SOCKET) || alternate_editor) | |
805 | return s; | |
806 | ||
42073bfb | 807 | message (TRUE, "%s: error accessing server file \"%s\"", |
b03d27bd JB |
808 | progname, server_file); |
809 | exit (EXIT_FAILURE); | |
46cec291 | 810 | } |
b03d27bd JB |
811 | |
812 | #ifndef NO_SOCKETS_IN_FILE_SYSTEM | |
813 | /* Implicit local socket. */ | |
814 | s = set_local_socket (); | |
815 | if (s != INVALID_SOCKET) | |
816 | return s; | |
817 | #endif | |
818 | ||
819 | /* Implicit server file. */ | |
820 | server_file = "server"; | |
821 | s = set_tcp_socket (); | |
822 | if ((s != INVALID_SOCKET) || alternate_editor) | |
823 | return s; | |
824 | ||
825 | /* No implicit or explicit socket, and no alternate editor. */ | |
42073bfb | 826 | message (TRUE, "%s: No socket or alternate editor. Please use:\n\n" |
b03d27bd JB |
827 | #ifndef NO_SOCKETS_IN_FILE_SYSTEM |
828 | "\t--socket-name\n" | |
aa0b6932 | 829 | #endif |
b03d27bd JB |
830 | "\t--server-file (or environment variable EMACS_SERVER_FILE)\n\ |
831 | \t--alternate-editor (or environment variable ALTERNATE_EDITOR)\n", | |
832 | progname); | |
833 | exit (EXIT_FAILURE); | |
aa0b6932 | 834 | } |
46cec291 | 835 | |
aa0b6932 JB |
836 | int |
837 | main (argc, argv) | |
838 | int argc; | |
839 | char **argv; | |
840 | { | |
841 | HSOCKET s; | |
842 | int i, rl, needlf = 0; | |
843 | char *cwd; | |
844 | char string[BUFSIZ+1]; | |
845 | ||
846 | progname = argv[0]; | |
847 | ||
848 | /* Process options. */ | |
849 | decode_options (argc, argv); | |
850 | ||
851 | if ((argc - optind < 1) && !eval) | |
23a7488d | 852 | { |
42073bfb JB |
853 | message (TRUE, "%s: file name or argument required\nTry `%s --help' for more information\n", |
854 | progname, progname); | |
aa0b6932 | 855 | exit (EXIT_FAILURE); |
23a7488d RS |
856 | } |
857 | ||
aa0b6932 JB |
858 | if ((s = set_socket ()) == INVALID_SOCKET) |
859 | fail (argc, argv); | |
860 | ||
38732dba | 861 | #ifdef HAVE_GETCWD |
ee6a193c | 862 | cwd = getcwd (string, sizeof string); |
38732dba RS |
863 | #else |
864 | cwd = getwd (string); | |
ee6a193c | 865 | #endif |
46cec291 RS |
866 | if (cwd == 0) |
867 | { | |
868 | /* getwd puts message in STRING if it fails. */ | |
38732dba | 869 | #ifdef HAVE_GETCWD |
42073bfb | 870 | message (TRUE, "%s: %s (%s)\n", progname, |
bb5618fe | 871 | "Cannot get current working directory", strerror (errno)); |
38732dba | 872 | #else |
42073bfb | 873 | message (TRUE, "%s: %s (%s)\n", progname, string, strerror (errno)); |
bd252662 | 874 | #endif |
97e3214d | 875 | fail (argc, argv); |
46cec291 RS |
876 | } |
877 | ||
5212210c | 878 | if (nowait) |
aa0b6932 | 879 | SEND_STRING ("-nowait "); |
292d74a3 | 880 | |
30be2360 | 881 | if (eval) |
aa0b6932 | 882 | SEND_STRING ("-eval "); |
30be2360 SM |
883 | |
884 | if (display) | |
87209357 | 885 | { |
aa0b6932 JB |
886 | SEND_STRING ("-display "); |
887 | SEND_QUOTED (display); | |
888 | SEND_STRING (" "); | |
87209357 | 889 | } |
30be2360 | 890 | |
87209357 | 891 | if ((argc - optind > 0)) |
5212210c | 892 | { |
87209357 | 893 | for (i = optind; i < argc; i++) |
46cec291 | 894 | { |
87209357 EZ |
895 | if (eval) |
896 | ; /* Don't prepend any cwd or anything like that. */ | |
897 | else if (*argv[i] == '+') | |
898 | { | |
899 | char *p = argv[i] + 1; | |
900 | while (isdigit ((unsigned char) *p) || *p == ':') p++; | |
901 | if (*p != 0) | |
902 | { | |
aa0b6932 JB |
903 | SEND_QUOTED (cwd); |
904 | SEND_STRING ("/"); | |
87209357 EZ |
905 | } |
906 | } | |
b03d27bd | 907 | else if (! file_name_absolute_p (argv[i])) |
87209357 | 908 | { |
aa0b6932 JB |
909 | SEND_QUOTED (cwd); |
910 | SEND_STRING ("/"); | |
87209357 EZ |
911 | } |
912 | ||
aa0b6932 JB |
913 | SEND_QUOTED (argv[i]); |
914 | SEND_STRING (" "); | |
46cec291 | 915 | } |
46cec291 | 916 | } |
87209357 EZ |
917 | else |
918 | { | |
aa0b6932 | 919 | while (fgets (string, BUFSIZ, stdin)) |
87209357 | 920 | { |
aa0b6932 | 921 | SEND_QUOTED (string); |
87209357 | 922 | } |
aa0b6932 | 923 | SEND_STRING (" "); |
87209357 | 924 | } |
65396510 | 925 | |
aa0b6932 | 926 | SEND_STRING ("\n"); |
46cec291 | 927 | |
292d74a3 | 928 | /* Maybe wait for an answer. */ |
aa0b6932 | 929 | if (!nowait) |
30be2360 | 930 | { |
aa0b6932 JB |
931 | if (!eval) |
932 | { | |
933 | printf ("Waiting for Emacs..."); | |
934 | needlf = 2; | |
935 | } | |
936 | fflush (stdout); | |
937 | ||
938 | /* Now, wait for an answer and print any messages. */ | |
939 | while ((rl = recv (s, string, BUFSIZ, 0)) > 0) | |
940 | { | |
941 | string[rl] = '\0'; | |
942 | if (needlf == 2) | |
943 | printf ("\n"); | |
944 | printf ("%s", string); | |
945 | needlf = string[0] == '\0' ? needlf : string[strlen (string) - 1] != '\n'; | |
946 | } | |
947 | ||
948 | if (needlf) | |
949 | printf ("\n"); | |
950 | fflush (stdout); | |
30be2360 | 951 | } |
23a7488d | 952 | |
aa0b6932 | 953 | CLOSE_SOCKET (s); |
65396510 | 954 | return EXIT_SUCCESS; |
46cec291 RS |
955 | } |
956 | ||
1e7823d0 | 957 | #endif /* HAVE_SOCKETS && HAVE_INET_SOCKETS */ |
aa0b6932 | 958 | |
27711600 RM |
959 | #ifndef HAVE_STRERROR |
960 | char * | |
961 | strerror (errnum) | |
962 | int errnum; | |
963 | { | |
964 | extern char *sys_errlist[]; | |
965 | extern int sys_nerr; | |
966 | ||
967 | if (errnum >= 0 && errnum < sys_nerr) | |
968 | return sys_errlist[errnum]; | |
969 | return (char *) "Unknown error"; | |
970 | } | |
971 | ||
972 | #endif /* ! HAVE_STRERROR */ | |
ab5796a9 MB |
973 | |
974 | /* arch-tag: f39bb9c4-73eb-477e-896d-50832e2ca9a7 | |
975 | (do not change this comment) */ | |
65396510 TTN |
976 | |
977 | /* emacsclient.c ends here */ |