Include config.h, lisp.h, buffer.h, process.h, commands.h, errno.h and file.h.
[bpt/emacs.git] / lib-src / emacsclient.c
CommitLineData
efb859b4 1/* Client process that communicates with GNU Emacs acting as server.
92af894f 2 Copyright (C) 1986, 1987, 1994 Free Software Foundation, Inc.
46cec291
RS
3
4This file is part of GNU Emacs.
5
6GNU Emacs is free software; you can redistribute it and/or modify
7it under the terms of the GNU General Public License as published by
92af894f 8the Free Software Foundation; either version 2, or (at your option)
46cec291
RS
9any later version.
10
11GNU Emacs is distributed in the hope that it will be useful,
12but WITHOUT ANY WARRANTY; without even the implied warranty of
13MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14GNU General Public License for more details.
15
16You should have received a copy of the GNU General Public License
17along with GNU Emacs; see the file COPYING. If not, write to
18the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. */
19
20
21#define NO_SHORTNAMES
18160b98 22#include <../src/config.h>
46cec291
RS
23#undef read
24#undef write
25#undef open
46cec291 26#undef close
4e23f2ba 27#undef signal
46cec291
RS
28
29
30#if !defined(HAVE_SOCKETS) && !defined(HAVE_SYSVIPC)
31#include <stdio.h>
32
33main (argc, argv)
34 int argc;
35 char **argv;
36{
37 fprintf (stderr, "%s: Sorry, the Emacs server is supported only\n",
38 argv[0]);
39 fprintf (stderr, "on systems with Berkeley sockets or System V IPC.\n");
40 exit (1);
41}
42
43#else /* HAVE_SOCKETS or HAVE_SYSVIPC */
44
45#if ! defined (HAVE_SYSVIPC)
46/* BSD code is very different from SYSV IPC code */
47
48#include <sys/types.h>
49#include <sys/socket.h>
50#include <sys/un.h>
efb859b4 51#include <sys/stat.h>
46cec291
RS
52#include <stdio.h>
53#include <errno.h>
54
92af894f 55extern char *strerror ();
46cec291
RS
56extern int errno;
57
58main (argc, argv)
59 int argc;
60 char **argv;
61{
62 char system_name[32];
63 int s, i;
64 FILE *out;
65 struct sockaddr_un server;
66 char *homedir, *cwd, *str;
67 char string[BUFSIZ];
68
69 char *getenv (), *getwd ();
70 int geteuid ();
71
72 if (argc < 2)
73 {
74 fprintf (stderr, "Usage: %s [+linenumber] filename\n", argv[0]);
75 exit (1);
76 }
77
78 /*
79 * Open up an AF_UNIX socket in this person's home directory
80 */
81
82 if ((s = socket (AF_UNIX, SOCK_STREAM, 0)) < 0)
83 {
84 fprintf (stderr, "%s: ", argv[0]);
85 perror ("socket");
86 exit (1);
87 }
88 server.sun_family = AF_UNIX;
89#ifndef SERVER_HOME_DIR
efb859b4
JB
90 {
91 struct stat statbfr;
92
93 gethostname (system_name, sizeof (system_name));
94 sprintf (server.sun_path, "/tmp/esrv%d-%s", geteuid (), system_name);
95
96 if (stat (server.sun_path, &statbfr) == -1)
97 {
c0acc3e1
JB
98 if (errno == ENOENT)
99 fprintf (stderr,
100 "Can't find socket; have you started the server?\n");
101 else
102 perror ("stat");
efb859b4
JB
103 exit (1);
104 }
105 if (statbfr.st_uid != geteuid())
106 {
107 fprintf (stderr, "Illegal socket owner\n");
108 exit (1);
109 }
110 }
46cec291
RS
111#else
112 if ((homedir = getenv ("HOME")) == NULL)
113 {
114 fprintf (stderr, "%s: No home directory\n", argv[0]);
115 exit (1);
116 }
117 strcpy (server.sun_path, homedir);
118 strcat (server.sun_path, "/.emacs_server");
119#endif
120
4e23f2ba
JB
121 if (connect (s, (struct sockaddr *) &server, strlen (server.sun_path) + 2)
122 < 0)
46cec291
RS
123 {
124 fprintf (stderr, "%s: ", argv[0]);
125 perror ("connect");
126 exit (1);
127 }
128 if ((out = fdopen (s, "r+")) == NULL)
129 {
130 fprintf (stderr, "%s: ", argv[0]);
131 perror ("fdopen");
132 exit (1);
133 }
134
135 cwd = getwd (string);
136 if (cwd == 0)
137 {
138 /* getwd puts message in STRING if it fails. */
92af894f 139 fprintf (stderr, "%s: %s (%s)\n", argv[0], string, strerror (errno));
46cec291
RS
140 exit (1);
141 }
142
143 for (i = 1; i < argc; i++)
144 {
145 if (*argv[i] == '+')
146 {
147 char *p = argv[i] + 1;
148 while (*p >= '0' && *p <= '9') p++;
149 if (*p != 0)
150 fprintf (out, "%s/", cwd);
151 }
152 else if (*argv[i] != '/')
153 fprintf (out, "%s/", cwd);
154 fprintf (out, "%s ", argv[i]);
155 }
156 fprintf (out, "\n");
157 fflush (out);
158
159 printf ("Waiting for Emacs...");
160 fflush (stdout);
161
162 rewind (out); /* re-read the output */
163 str = fgets (string, BUFSIZ, out);
164
165 /* Now, wait for an answer and print any messages. */
166
167 while (str = fgets (string, BUFSIZ, out))
168 printf ("%s", str);
169
170 exit (0);
171}
172
173#else /* This is the SYSV IPC section */
174
175#include <sys/types.h>
176#include <sys/ipc.h>
177#include <sys/msg.h>
178#include <stdio.h>
179
180main (argc, argv)
181 int argc;
182 char **argv;
183{
184 int s;
185 key_t key;
186 struct msgbuf * msgp =
187 (struct msgbuf *) malloc (sizeof *msgp + BUFSIZ);
188 struct msqid_ds * msg_st;
189 char *homedir, buf[BUFSIZ];
190 char gwdirb[BUFSIZ];
191 char *cwd;
192 char *temp;
193 char *getwd (), *getcwd (), *getenv ();
194
195 if (argc < 2)
196 {
197 fprintf (stderr, "Usage: %s [+linenumber] filename\n", argv[0]);
198 exit (1);
199 }
200
201 /*
202 * Create a message queue using ~/.emacs_server as the path for ftok
203 */
204 if ((homedir = getenv ("HOME")) == NULL)
205 {
206 fprintf (stderr, "%s: No home directory\n", argv[0]);
207 exit (1);
208 }
209 strcpy (buf, homedir);
210 strcat (buf, "/.emacs_server");
211 creat (buf, 0600);
212 key = ftok (buf, 1); /* unlikely to be anyone else using it */
61a93162 213 s = msgget (key, 0600 | IPC_CREAT);
46cec291
RS
214 if (s == -1)
215 {
216 fprintf (stderr, "%s: ", argv[0]);
217 perror ("msgget");
218 exit (1);
219 }
220
221 /* Determine working dir, so we can prefix it to all the arguments. */
222#ifdef BSD
223 temp = getwd (gwdirb);
224#else
225 temp = getcwd (gwdirb, sizeof gwdirb);
226#endif
227
228 cwd = gwdirb;
229 if (temp != 0)
230 {
231 /* On some systems, cwd can look like `@machine/...';
232 ignore everything before the first slash in such a case. */
233 while (*cwd && *cwd != '/')
234 cwd++;
235 strcat (cwd, "/");
236 }
237 else
238 {
239 fprintf (stderr, cwd);
240 exit (1);
241 }
242
243 msgp->mtext[0] = 0;
244 argc--; argv++;
245 while (argc)
246 {
247 if (*argv[0] == '+')
248 {
249 char *p = argv[0] + 1;
250 while (*p >= '0' && *p <= '9') p++;
251 if (*p != 0)
252 strcat (msgp->mtext, cwd);
253 }
254 else if (*argv[0] != '/')
255 strcat (msgp->mtext, cwd);
256
257 strcat (msgp->mtext, argv[0]);
258 strcat (msgp->mtext, " ");
259 argv++; argc--;
260 }
261 strcat (msgp->mtext, "\n");
262 msgp->mtype = 1;
263 if (msgsnd (s, msgp, strlen (msgp->mtext)+1, 0) < 0)
264 {
265 fprintf (stderr, "%s: ", argv[0]);
266 perror ("msgsnd");
267 exit (1);
268 }
269 /*
270 * Now, wait for an answer
271 */
272 printf ("Waiting for Emacs...");
273 fflush (stdout);
274
275 msgrcv (s, msgp, BUFSIZ, getpid (), 0); /* wait for anything back */
276 strcpy (buf, msgp->mtext);
277
278 printf ("\n%s\n", buf);
279 exit (0);
280}
281
282#endif /* HAVE_SYSVIPC */
283
284#endif /* HAVE_SOCKETS or HAVE_SYSVIPC */
27711600
RM
285\f
286#ifndef HAVE_STRERROR
287char *
288strerror (errnum)
289 int errnum;
290{
291 extern char *sys_errlist[];
292 extern int sys_nerr;
293
294 if (errnum >= 0 && errnum < sys_nerr)
295 return sys_errlist[errnum];
296 return (char *) "Unknown error";
297}
298
299#endif /* ! HAVE_STRERROR */