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comparison lib-src/emacsclient.c @ 0:376386a54a3c r19-14

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Import from CVS: tag r19-14
author cvs
date Mon, 13 Aug 2007 08:45:50 +0200
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children bcdc7deadc19
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-1:000000000000 0:376386a54a3c
1 /* Client process that communicates with GNU Emacs acting as server.
2 Copyright (C) 1986, 1987, 1993, 1994 Free Software Foundation, Inc.
3
4 This file is part of GNU Emacs.
5
6 GNU Emacs is free software; you can redistribute it and/or modify
7 it under the terms of the GNU General Public License as published by
8 the Free Software Foundation; either version 2, or (at your option)
9 any later version.
10
11 GNU Emacs is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 GNU General Public License for more details.
15
16 You should have received a copy of the GNU General Public License
17 along with GNU Emacs; see the file COPYING. If not, write to
18 the Free the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
19 Boston, MA 02111-1307, USA. */
20
21 /* Synched up with: FSF 19.28. */
22
23 #define NO_SHORTNAMES
24 #include <../src/config.h>
25 #undef read
26 #undef write
27 #undef open
28 #undef close
29 #undef signal
30
31 #if __STDC__ || defined(STDC_HEADERS)
32 #include <stdlib.h>
33 #include <unistd.h>
34 #include <fcntl.h> /* for creat() */
35 #include <string.h>
36 #endif
37
38 #if !defined(HAVE_SOCKETS) && !defined(HAVE_SYSVIPC)
39 #include <stdio.h>
40
41 main (argc, argv)
42 int argc;
43 char **argv;
44 {
45 fprintf (stderr, "%s: Sorry, the Emacs server is supported only\n",
46 argv[0]);
47 fprintf (stderr, "on systems with Berkeley sockets or System V IPC.\n");
48 exit (1);
49 }
50
51 #else /* HAVE_SOCKETS or HAVE_SYSVIPC */
52
53 #if ! defined (HAVE_SYSVIPC)
54 /* BSD code is very different from SYSV IPC code */
55
56 #include <sys/types.h>
57 #include <sys/socket.h>
58 #include <sys/un.h>
59 #include <sys/stat.h>
60 #include <stdio.h>
61 #include <errno.h>
62
63 extern char *strerror ();
64 extern int errno;
65
66 void
67 main (argc, argv)
68 int argc;
69 char **argv;
70 {
71 char system_name[256];
72 int s, i;
73 FILE *out;
74 struct sockaddr_un server;
75 char *cwd, *str;
76 char string[BUFSIZ];
77
78 if (argc < 2)
79 {
80 fprintf (stderr, "Usage: %s [+linenumber] filename\n", argv[0]);
81 exit (1);
82 }
83
84 /*
85 * Open up an AF_UNIX socket in this person's home directory
86 */
87
88 if ((s = socket (AF_UNIX, SOCK_STREAM, 0)) < 0)
89 {
90 fprintf (stderr, "%s: ", argv[0]);
91 perror ("socket");
92 exit (1);
93 }
94 server.sun_family = AF_UNIX;
95 #ifndef SERVER_HOME_DIR
96 {
97 struct stat statbfr;
98
99 gethostname (system_name, sizeof (system_name));
100 sprintf (server.sun_path, "/tmp/esrv%d-%s", (int) geteuid (), system_name);
101
102 if (stat (server.sun_path, &statbfr) == -1)
103 {
104 if (errno == ENOENT)
105 fprintf (stderr,
106 "Can't find socket; have you started the server?\n");
107 else
108 perror ("stat");
109 exit (1);
110 }
111 if (statbfr.st_uid != geteuid())
112 {
113 fprintf (stderr, "Illegal socket owner\n");
114 exit (1);
115 }
116 }
117 #else
118 if (getenv ("HOME") == NULL)
119 {
120 fprintf (stderr, "%s: No home directory\n", argv[0]);
121 exit (1);
122 }
123 sprintf (server.sun_path, "/tmp/esrv%d", geteuid ());
124 #if 0
125 strcpy (server.sun_path, getenv ("HOME"));
126 strcat (server.sun_path, "/.emacs_server");
127 #endif
128 #endif /* SERVER_HOME_DIR */
129 if (connect (s, (struct sockaddr *) &server, strlen (server.sun_path) + 2)
130 < 0)
131 {
132 fprintf (stderr, "%s: ", argv[0]);
133 perror ("connect");
134 exit (1);
135 }
136 if ((out = (FILE *) fdopen (s, "r+")) == NULL)
137 {
138 fprintf (stderr, "%s: ", argv[0]);
139 perror ("fdopen");
140 exit (1);
141 }
142
143 #ifdef BSD
144 cwd = (char *) getwd (string);
145 #else
146 cwd = (char *) getcwd (string, sizeof (string));
147 #endif
148
149 if (cwd == 0)
150 {
151 /* getwd puts message in STRING if it fails. */
152 fprintf (stderr, "%s: %s (%s)\n", argv[0], string, strerror (errno));
153 exit (1);
154 }
155
156 for (i = 1; i < argc; i++)
157 {
158 if (*argv[i] == '+')
159 {
160 char *p = argv[i] + 1;
161 while (*p >= '0' && *p <= '9') p++;
162 if (*p != 0)
163 fprintf (out, "%s/", cwd);
164 }
165 else if (*argv[i] != '/')
166 fprintf (out, "%s/", cwd);
167 fprintf (out, "%s ", argv[i]);
168 }
169 fprintf (out, "\n");
170 fflush (out);
171
172 printf ("Waiting for Emacs...");
173 fflush (stdout);
174
175 rewind (out); /* re-read the output */
176 str = fgets (string, BUFSIZ, out);
177
178 /* Now, wait for an answer and print any messages. */
179
180 while ((str = fgets (string, BUFSIZ, out)))
181 printf ("%s", str);
182
183 exit (0);
184 }
185
186 #else /* This is the SYSV IPC section */
187
188 #include <sys/types.h>
189 #include <sys/ipc.h>
190 #include <sys/msg.h>
191 #include <stdio.h>
192
193 char *getwd ();
194 #if !__STDC__ && !defined(STDC_HEADERS)
195 char *getcwd (), *getenv ();
196 #endif
197
198 void
199 main (argc, argv)
200 int argc;
201 char **argv;
202 {
203 int s;
204 key_t key;
205 /* Size of text allocated in MSGP. */
206 int size_allocated = BUFSIZ;
207 /* Amount of text used in MSGP. */
208 int used;
209 struct msgbuf *msgp
210 = (struct msgbuf *) malloc (sizeof (struct msgbuf) + size_allocated);
211 #if 0
212 struct msqid_ds * msg_st;
213 #endif /* 0 */
214 char *homedir, buf[BUFSIZ];
215 char gwdirb[BUFSIZ];
216 char *cwd;
217 char *temp;
218 char progname[BUFSIZ];
219
220 strcpy (progname, argv[0]);
221
222 if (argc < 2)
223 {
224 fprintf (stderr, "Usage: %s [+linenumber] filename\n", argv[0]);
225 exit (1);
226 }
227
228 /*
229 * Create a message queue using ~/.emacs_server as the path for ftok
230 */
231 if ((homedir = getenv ("HOME")) == NULL)
232 {
233 fprintf (stderr, "%s: No home directory\n", argv[0]);
234 exit (1);
235 }
236 strcpy (buf, homedir);
237 strcat (buf, "/.emacs_server");
238 creat (buf, 0600);
239 key = ftok (buf, 1); /* unlikely to be anyone else using it */
240 s = msgget (key, 0600 | IPC_CREAT);
241 if (s == -1)
242 {
243 fprintf (stderr, "%s: ", argv[0]);
244 perror ("msgget");
245 exit (1);
246 }
247
248 /* Determine working dir, so we can prefix it to all the arguments. */
249 #ifdef BSD
250 temp = getwd (gwdirb);
251 #else
252 temp = getcwd (gwdirb, sizeof gwdirb);
253 #endif
254
255 cwd = gwdirb;
256 if (temp != 0)
257 {
258 /* On some systems, cwd can look like `@machine/...';
259 ignore everything before the first slash in such a case. */
260 while (*cwd && *cwd != '/')
261 cwd++;
262 strcat (cwd, "/");
263 }
264 else
265 {
266 fprintf (stderr, cwd);
267 exit (1);
268 }
269
270 msgp->mtext[0] = 0;
271 used = 0;
272 argc--; argv++;
273 while (argc)
274 {
275 int need_cwd = 0;
276 char *modified_arg = argv[0];
277 if (*modified_arg == '+')
278 {
279 char *p = modified_arg + 1;
280 while (*p >= '0' && *p <= '9') p++;
281 if (*p != 0)
282 need_cwd = 1;
283 }
284 else if (*modified_arg != '/')
285 need_cwd = 1;
286
287 if (need_cwd)
288 used += strlen (cwd);
289 used += strlen (modified_arg) + 1;
290 while (used + 2 > size_allocated)
291 {
292 size_allocated *= 2;
293 msgp = (struct msgbuf *) realloc (msgp,
294 (sizeof (struct msgbuf)
295 + size_allocated));
296 }
297 if (need_cwd)
298 strcat (msgp->mtext, cwd);
299
300 strcat (msgp->mtext, modified_arg);
301 strcat (msgp->mtext, " ");
302 argv++; argc--;
303 }
304 strcat (msgp->mtext, "\n");
305 #ifdef HPUX /* HPUX has a bug. */
306 if (strlen (msgp->mtext) >= 512)
307 {
308 fprintf (stderr, "emacsclient: args too long for msgsnd\n");
309 exit (1);
310 }
311 #endif
312 msgp->mtype = 1;
313 if (msgsnd (s, msgp, strlen (msgp->mtext)+1, 0) < 0)
314 {
315 fprintf (stderr, "%s: ", progname);
316 perror ("msgsnd");
317 exit (1);
318 }
319 /*
320 * Now, wait for an answer
321 */
322 printf ("Waiting for Emacs...");
323 fflush (stdout);
324
325 msgrcv (s, msgp, BUFSIZ, getpid (), 0); /* wait for anything back */
326 strcpy (buf, msgp->mtext);
327
328 printf ("\n%s\n", buf);
329 exit (0);
330 }
331
332 #endif /* HAVE_SYSVIPC */
333
334 #endif /* HAVE_SOCKETS or HAVE_SYSVIPC */
335
336 #ifndef HAVE_STRERROR
337 char *
338 strerror (errnum)
339 int errnum;
340 {
341 extern char *sys_errlist[];
342 extern int sys_nerr;
343
344 if (errnum >= 0 && errnum < sys_nerr)
345 return sys_errlist[errnum];
346 return (char *) "Unknown error";
347 }
348
349 #endif /* ! HAVE_STRERROR */