Commit | Line | Data |
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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 | |
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 | |
92af894f | 8 | the Free Software Foundation; either version 2, or (at your option) |
46cec291 RS |
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 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 | ||
b135a7cf | 30 | #if !defined (HAVE_SOCKETS) && !defined (HAVE_SYSVIPC) |
46cec291 RS |
31 | #include <stdio.h> |
32 | ||
33 | main (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 | ||
1e523e3d | 45 | #if defined (HAVE_SOCKETS) && ! defined (NO_SOCKETS_IN_FILE_SYSTEM) |
46cec291 RS |
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 | 55 | extern char *strerror (); |
46cec291 RS |
56 | extern int errno; |
57 | ||
340ff9de | 58 | int |
46cec291 RS |
59 | main (argc, argv) |
60 | int argc; | |
61 | char **argv; | |
62 | { | |
63 | char system_name[32]; | |
64 | int s, i; | |
65 | FILE *out; | |
66 | struct sockaddr_un server; | |
67 | char *homedir, *cwd, *str; | |
68 | char string[BUFSIZ]; | |
69 | ||
70 | char *getenv (), *getwd (); | |
7e1251a1 | 71 | char *getcwd (); |
46cec291 RS |
72 | int geteuid (); |
73 | ||
74 | if (argc < 2) | |
75 | { | |
76 | fprintf (stderr, "Usage: %s [+linenumber] filename\n", argv[0]); | |
77 | exit (1); | |
78 | } | |
79 | ||
80 | /* | |
81 | * Open up an AF_UNIX socket in this person's home directory | |
82 | */ | |
83 | ||
84 | if ((s = socket (AF_UNIX, SOCK_STREAM, 0)) < 0) | |
85 | { | |
86 | fprintf (stderr, "%s: ", argv[0]); | |
87 | perror ("socket"); | |
88 | exit (1); | |
89 | } | |
90 | server.sun_family = AF_UNIX; | |
91 | #ifndef SERVER_HOME_DIR | |
efb859b4 JB |
92 | { |
93 | struct stat statbfr; | |
94 | ||
95 | gethostname (system_name, sizeof (system_name)); | |
96 | sprintf (server.sun_path, "/tmp/esrv%d-%s", geteuid (), system_name); | |
97 | ||
98 | if (stat (server.sun_path, &statbfr) == -1) | |
99 | { | |
c0acc3e1 JB |
100 | if (errno == ENOENT) |
101 | fprintf (stderr, | |
102 | "Can't find socket; have you started the server?\n"); | |
103 | else | |
104 | perror ("stat"); | |
efb859b4 JB |
105 | exit (1); |
106 | } | |
b135a7cf | 107 | if (statbfr.st_uid != geteuid ()) |
efb859b4 | 108 | { |
b135a7cf | 109 | fprintf (stderr, "Invalid socket owner\n"); |
efb859b4 JB |
110 | exit (1); |
111 | } | |
112 | } | |
46cec291 RS |
113 | #else |
114 | if ((homedir = getenv ("HOME")) == NULL) | |
115 | { | |
116 | fprintf (stderr, "%s: No home directory\n", argv[0]); | |
117 | exit (1); | |
118 | } | |
119 | strcpy (server.sun_path, homedir); | |
b135a7cf RS |
120 | strcat (server.sun_path, "/.emacs-server-"); |
121 | gethostname (system_name, sizeof (system_name)); | |
122 | strcat (server.sun_path, system_name); | |
46cec291 RS |
123 | #endif |
124 | ||
4e23f2ba JB |
125 | if (connect (s, (struct sockaddr *) &server, strlen (server.sun_path) + 2) |
126 | < 0) | |
46cec291 RS |
127 | { |
128 | fprintf (stderr, "%s: ", argv[0]); | |
129 | perror ("connect"); | |
130 | exit (1); | |
131 | } | |
132 | if ((out = fdopen (s, "r+")) == NULL) | |
133 | { | |
134 | fprintf (stderr, "%s: ", argv[0]); | |
135 | perror ("fdopen"); | |
136 | exit (1); | |
137 | } | |
138 | ||
ee6a193c | 139 | #ifdef BSD |
46cec291 | 140 | cwd = getwd (string); |
ee6a193c RS |
141 | #else |
142 | cwd = getcwd (string, sizeof string); | |
143 | #endif | |
46cec291 RS |
144 | if (cwd == 0) |
145 | { | |
146 | /* getwd puts message in STRING if it fails. */ | |
92af894f | 147 | fprintf (stderr, "%s: %s (%s)\n", argv[0], string, strerror (errno)); |
46cec291 RS |
148 | exit (1); |
149 | } | |
150 | ||
151 | for (i = 1; i < argc; i++) | |
152 | { | |
153 | if (*argv[i] == '+') | |
154 | { | |
155 | char *p = argv[i] + 1; | |
156 | while (*p >= '0' && *p <= '9') p++; | |
157 | if (*p != 0) | |
158 | fprintf (out, "%s/", cwd); | |
159 | } | |
160 | else if (*argv[i] != '/') | |
161 | fprintf (out, "%s/", cwd); | |
162 | fprintf (out, "%s ", argv[i]); | |
163 | } | |
164 | fprintf (out, "\n"); | |
165 | fflush (out); | |
166 | ||
167 | printf ("Waiting for Emacs..."); | |
168 | fflush (stdout); | |
169 | ||
170 | rewind (out); /* re-read the output */ | |
171 | str = fgets (string, BUFSIZ, out); | |
172 | ||
173 | /* Now, wait for an answer and print any messages. */ | |
174 | ||
175 | while (str = fgets (string, BUFSIZ, out)) | |
176 | printf ("%s", str); | |
177 | ||
340ff9de | 178 | return 0; |
46cec291 RS |
179 | } |
180 | ||
181 | #else /* This is the SYSV IPC section */ | |
182 | ||
183 | #include <sys/types.h> | |
184 | #include <sys/ipc.h> | |
185 | #include <sys/msg.h> | |
b135a7cf | 186 | #include <sys/utsname.h> |
46cec291 RS |
187 | #include <stdio.h> |
188 | ||
1518a9eb | 189 | char *getwd (), *getcwd (), *getenv (); |
b135a7cf | 190 | struct utsname system_name; |
1518a9eb | 191 | |
46cec291 RS |
192 | main (argc, argv) |
193 | int argc; | |
194 | char **argv; | |
195 | { | |
196 | int s; | |
197 | key_t key; | |
1518a9eb RS |
198 | /* Size of text allocated in MSGP. */ |
199 | int size_allocated = BUFSIZ; | |
200 | /* Amount of text used in MSGP. */ | |
201 | int used; | |
202 | struct msgbuf *msgp | |
203 | = (struct msgbuf *) malloc (sizeof (struct msgbuf) + size_allocated); | |
46cec291 RS |
204 | struct msqid_ds * msg_st; |
205 | char *homedir, buf[BUFSIZ]; | |
206 | char gwdirb[BUFSIZ]; | |
207 | char *cwd; | |
208 | char *temp; | |
defb80d7 | 209 | char *progname = argv[0]; |
46cec291 RS |
210 | |
211 | if (argc < 2) | |
212 | { | |
213 | fprintf (stderr, "Usage: %s [+linenumber] filename\n", argv[0]); | |
214 | exit (1); | |
215 | } | |
216 | ||
217 | /* | |
b135a7cf | 218 | * Create a message queue using ~/.emacs-server as the path for ftok |
46cec291 RS |
219 | */ |
220 | if ((homedir = getenv ("HOME")) == NULL) | |
221 | { | |
222 | fprintf (stderr, "%s: No home directory\n", argv[0]); | |
223 | exit (1); | |
224 | } | |
225 | strcpy (buf, homedir); | |
b135a7cf RS |
226 | #ifndef HAVE_LONG_FILE_NAMES |
227 | /* If file names are short, we can't fit the host name. */ | |
228 | strcat (buf, "/.emacs-server"); | |
229 | #else | |
230 | strcat (buf, "/.emacs-server-"); | |
231 | uname (&system_name); | |
232 | strcat (buf, system_name.nodename); | |
233 | #endif | |
46cec291 RS |
234 | creat (buf, 0600); |
235 | key = ftok (buf, 1); /* unlikely to be anyone else using it */ | |
61a93162 | 236 | s = msgget (key, 0600 | IPC_CREAT); |
46cec291 RS |
237 | if (s == -1) |
238 | { | |
239 | fprintf (stderr, "%s: ", argv[0]); | |
240 | perror ("msgget"); | |
241 | exit (1); | |
242 | } | |
243 | ||
244 | /* Determine working dir, so we can prefix it to all the arguments. */ | |
245 | #ifdef BSD | |
246 | temp = getwd (gwdirb); | |
247 | #else | |
248 | temp = getcwd (gwdirb, sizeof gwdirb); | |
249 | #endif | |
250 | ||
251 | cwd = gwdirb; | |
252 | if (temp != 0) | |
253 | { | |
254 | /* On some systems, cwd can look like `@machine/...'; | |
255 | ignore everything before the first slash in such a case. */ | |
256 | while (*cwd && *cwd != '/') | |
257 | cwd++; | |
258 | strcat (cwd, "/"); | |
259 | } | |
260 | else | |
261 | { | |
262 | fprintf (stderr, cwd); | |
263 | exit (1); | |
264 | } | |
265 | ||
266 | msgp->mtext[0] = 0; | |
1518a9eb | 267 | used = 0; |
46cec291 RS |
268 | argc--; argv++; |
269 | while (argc) | |
270 | { | |
1518a9eb | 271 | int need_cwd = 0; |
cd33a5a0 RS |
272 | char *modified_arg = argv[0]; |
273 | if (*modified_arg == '+') | |
46cec291 | 274 | { |
cd33a5a0 | 275 | char *p = modified_arg + 1; |
46cec291 RS |
276 | while (*p >= '0' && *p <= '9') p++; |
277 | if (*p != 0) | |
1518a9eb | 278 | need_cwd = 1; |
46cec291 | 279 | } |
cd33a5a0 | 280 | else if (*modified_arg != '/') |
1518a9eb RS |
281 | need_cwd = 1; |
282 | ||
283 | if (need_cwd) | |
284 | used += strlen (cwd); | |
cd33a5a0 | 285 | used += strlen (modified_arg) + 1; |
1518a9eb RS |
286 | while (used + 2 > size_allocated) |
287 | { | |
288 | size_allocated *= 2; | |
289 | msgp = (struct msgbuf *) realloc (msgp, | |
290 | (sizeof (struct msgbuf) | |
291 | + size_allocated)); | |
292 | } | |
293 | ||
294 | if (need_cwd) | |
46cec291 RS |
295 | strcat (msgp->mtext, cwd); |
296 | ||
cd33a5a0 | 297 | strcat (msgp->mtext, modified_arg); |
46cec291 RS |
298 | strcat (msgp->mtext, " "); |
299 | argv++; argc--; | |
300 | } | |
301 | strcat (msgp->mtext, "\n"); | |
1518a9eb RS |
302 | #ifdef HPUX /* HPUX has a bug. */ |
303 | if (strlen (msgp->mtext) >= 512) | |
304 | { | |
305 | fprintf (stderr, "emacsclient: args too long for msgsnd\n"); | |
306 | exit (1); | |
307 | } | |
308 | #endif | |
46cec291 RS |
309 | msgp->mtype = 1; |
310 | if (msgsnd (s, msgp, strlen (msgp->mtext)+1, 0) < 0) | |
311 | { | |
defb80d7 | 312 | fprintf (stderr, "%s: ", progname); |
46cec291 RS |
313 | perror ("msgsnd"); |
314 | exit (1); | |
315 | } | |
316 | /* | |
317 | * Now, wait for an answer | |
318 | */ | |
319 | printf ("Waiting for Emacs..."); | |
320 | fflush (stdout); | |
321 | ||
322 | msgrcv (s, msgp, BUFSIZ, getpid (), 0); /* wait for anything back */ | |
323 | strcpy (buf, msgp->mtext); | |
324 | ||
325 | printf ("\n%s\n", buf); | |
326 | exit (0); | |
327 | } | |
328 | ||
329 | #endif /* HAVE_SYSVIPC */ | |
330 | ||
331 | #endif /* HAVE_SOCKETS or HAVE_SYSVIPC */ | |
27711600 RM |
332 | \f |
333 | #ifndef HAVE_STRERROR | |
334 | char * | |
335 | strerror (errnum) | |
336 | int errnum; | |
337 | { | |
338 | extern char *sys_errlist[]; | |
339 | extern int sys_nerr; | |
340 | ||
341 | if (errnum >= 0 && errnum < sys_nerr) | |
342 | return sys_errlist[errnum]; | |
343 | return (char *) "Unknown error"; | |
344 | } | |
345 | ||
346 | #endif /* ! HAVE_STRERROR */ |