Commit | Line | Data |
---|---|---|
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, | |
18a2fa91 KH |
102 | "%s: can't find socket; have you started the server?\n", |
103 | argv[0]); | |
c0acc3e1 | 104 | else |
18a2fa91 KH |
105 | fprintf (stderr, "%s: can't stat %s: %s\n", |
106 | argv[0], server.sun_path, strerror (errno)); | |
efb859b4 JB |
107 | exit (1); |
108 | } | |
b135a7cf | 109 | if (statbfr.st_uid != geteuid ()) |
efb859b4 | 110 | { |
18a2fa91 | 111 | fprintf (stderr, "%s: Invalid socket owner\n", argv[0]); |
efb859b4 JB |
112 | exit (1); |
113 | } | |
114 | } | |
46cec291 RS |
115 | #else |
116 | if ((homedir = getenv ("HOME")) == NULL) | |
117 | { | |
118 | fprintf (stderr, "%s: No home directory\n", argv[0]); | |
119 | exit (1); | |
120 | } | |
121 | strcpy (server.sun_path, homedir); | |
b135a7cf RS |
122 | strcat (server.sun_path, "/.emacs-server-"); |
123 | gethostname (system_name, sizeof (system_name)); | |
124 | strcat (server.sun_path, system_name); | |
46cec291 RS |
125 | #endif |
126 | ||
4e23f2ba JB |
127 | if (connect (s, (struct sockaddr *) &server, strlen (server.sun_path) + 2) |
128 | < 0) | |
46cec291 RS |
129 | { |
130 | fprintf (stderr, "%s: ", argv[0]); | |
131 | perror ("connect"); | |
132 | exit (1); | |
133 | } | |
134 | if ((out = fdopen (s, "r+")) == NULL) | |
135 | { | |
136 | fprintf (stderr, "%s: ", argv[0]); | |
137 | perror ("fdopen"); | |
138 | exit (1); | |
139 | } | |
140 | ||
ee6a193c | 141 | #ifdef BSD |
46cec291 | 142 | cwd = getwd (string); |
ee6a193c RS |
143 | #else |
144 | cwd = getcwd (string, sizeof string); | |
145 | #endif | |
46cec291 RS |
146 | if (cwd == 0) |
147 | { | |
148 | /* getwd puts message in STRING if it fails. */ | |
92af894f | 149 | fprintf (stderr, "%s: %s (%s)\n", argv[0], string, strerror (errno)); |
46cec291 RS |
150 | exit (1); |
151 | } | |
152 | ||
153 | for (i = 1; i < argc; i++) | |
154 | { | |
155 | if (*argv[i] == '+') | |
156 | { | |
157 | char *p = argv[i] + 1; | |
158 | while (*p >= '0' && *p <= '9') p++; | |
159 | if (*p != 0) | |
160 | fprintf (out, "%s/", cwd); | |
161 | } | |
162 | else if (*argv[i] != '/') | |
163 | fprintf (out, "%s/", cwd); | |
164 | fprintf (out, "%s ", argv[i]); | |
165 | } | |
166 | fprintf (out, "\n"); | |
167 | fflush (out); | |
168 | ||
169 | printf ("Waiting for Emacs..."); | |
170 | fflush (stdout); | |
171 | ||
172 | rewind (out); /* re-read the output */ | |
173 | str = fgets (string, BUFSIZ, out); | |
174 | ||
175 | /* Now, wait for an answer and print any messages. */ | |
176 | ||
177 | while (str = fgets (string, BUFSIZ, out)) | |
178 | printf ("%s", str); | |
179 | ||
340ff9de | 180 | return 0; |
46cec291 RS |
181 | } |
182 | ||
183 | #else /* This is the SYSV IPC section */ | |
184 | ||
185 | #include <sys/types.h> | |
186 | #include <sys/ipc.h> | |
187 | #include <sys/msg.h> | |
b135a7cf | 188 | #include <sys/utsname.h> |
46cec291 RS |
189 | #include <stdio.h> |
190 | ||
1518a9eb | 191 | char *getwd (), *getcwd (), *getenv (); |
b135a7cf | 192 | struct utsname system_name; |
1518a9eb | 193 | |
46cec291 RS |
194 | main (argc, argv) |
195 | int argc; | |
196 | char **argv; | |
197 | { | |
198 | int s; | |
199 | key_t key; | |
1518a9eb RS |
200 | /* Size of text allocated in MSGP. */ |
201 | int size_allocated = BUFSIZ; | |
202 | /* Amount of text used in MSGP. */ | |
203 | int used; | |
204 | struct msgbuf *msgp | |
205 | = (struct msgbuf *) malloc (sizeof (struct msgbuf) + size_allocated); | |
46cec291 RS |
206 | struct msqid_ds * msg_st; |
207 | char *homedir, buf[BUFSIZ]; | |
208 | char gwdirb[BUFSIZ]; | |
209 | char *cwd; | |
210 | char *temp; | |
defb80d7 | 211 | char *progname = argv[0]; |
46cec291 RS |
212 | |
213 | if (argc < 2) | |
214 | { | |
215 | fprintf (stderr, "Usage: %s [+linenumber] filename\n", argv[0]); | |
216 | exit (1); | |
217 | } | |
218 | ||
219 | /* | |
b135a7cf | 220 | * Create a message queue using ~/.emacs-server as the path for ftok |
46cec291 RS |
221 | */ |
222 | if ((homedir = getenv ("HOME")) == NULL) | |
223 | { | |
224 | fprintf (stderr, "%s: No home directory\n", argv[0]); | |
225 | exit (1); | |
226 | } | |
227 | strcpy (buf, homedir); | |
b135a7cf RS |
228 | #ifndef HAVE_LONG_FILE_NAMES |
229 | /* If file names are short, we can't fit the host name. */ | |
230 | strcat (buf, "/.emacs-server"); | |
231 | #else | |
232 | strcat (buf, "/.emacs-server-"); | |
233 | uname (&system_name); | |
234 | strcat (buf, system_name.nodename); | |
235 | #endif | |
46cec291 RS |
236 | creat (buf, 0600); |
237 | key = ftok (buf, 1); /* unlikely to be anyone else using it */ | |
61a93162 | 238 | s = msgget (key, 0600 | IPC_CREAT); |
46cec291 RS |
239 | if (s == -1) |
240 | { | |
241 | fprintf (stderr, "%s: ", argv[0]); | |
242 | perror ("msgget"); | |
243 | exit (1); | |
244 | } | |
245 | ||
246 | /* Determine working dir, so we can prefix it to all the arguments. */ | |
247 | #ifdef BSD | |
248 | temp = getwd (gwdirb); | |
249 | #else | |
250 | temp = getcwd (gwdirb, sizeof gwdirb); | |
251 | #endif | |
252 | ||
253 | cwd = gwdirb; | |
254 | if (temp != 0) | |
255 | { | |
256 | /* On some systems, cwd can look like `@machine/...'; | |
257 | ignore everything before the first slash in such a case. */ | |
258 | while (*cwd && *cwd != '/') | |
259 | cwd++; | |
260 | strcat (cwd, "/"); | |
261 | } | |
262 | else | |
263 | { | |
26396b1b | 264 | fprintf (stderr, "%s: %s\n", argv[0], cwd); |
46cec291 RS |
265 | exit (1); |
266 | } | |
267 | ||
268 | msgp->mtext[0] = 0; | |
1518a9eb | 269 | used = 0; |
46cec291 RS |
270 | argc--; argv++; |
271 | while (argc) | |
272 | { | |
1518a9eb | 273 | int need_cwd = 0; |
cd33a5a0 RS |
274 | char *modified_arg = argv[0]; |
275 | if (*modified_arg == '+') | |
46cec291 | 276 | { |
cd33a5a0 | 277 | char *p = modified_arg + 1; |
46cec291 RS |
278 | while (*p >= '0' && *p <= '9') p++; |
279 | if (*p != 0) | |
1518a9eb | 280 | need_cwd = 1; |
46cec291 | 281 | } |
cd33a5a0 | 282 | else if (*modified_arg != '/') |
1518a9eb RS |
283 | need_cwd = 1; |
284 | ||
285 | if (need_cwd) | |
286 | used += strlen (cwd); | |
cd33a5a0 | 287 | used += strlen (modified_arg) + 1; |
1518a9eb RS |
288 | while (used + 2 > size_allocated) |
289 | { | |
290 | size_allocated *= 2; | |
291 | msgp = (struct msgbuf *) realloc (msgp, | |
292 | (sizeof (struct msgbuf) | |
293 | + size_allocated)); | |
294 | } | |
295 | ||
296 | if (need_cwd) | |
46cec291 RS |
297 | strcat (msgp->mtext, cwd); |
298 | ||
cd33a5a0 | 299 | strcat (msgp->mtext, modified_arg); |
46cec291 RS |
300 | strcat (msgp->mtext, " "); |
301 | argv++; argc--; | |
302 | } | |
303 | strcat (msgp->mtext, "\n"); | |
1518a9eb RS |
304 | #ifdef HPUX /* HPUX has a bug. */ |
305 | if (strlen (msgp->mtext) >= 512) | |
306 | { | |
18a2fa91 | 307 | fprintf (stderr, "%s: args too long for msgsnd\n", progname); |
1518a9eb RS |
308 | exit (1); |
309 | } | |
310 | #endif | |
46cec291 RS |
311 | msgp->mtype = 1; |
312 | if (msgsnd (s, msgp, strlen (msgp->mtext)+1, 0) < 0) | |
313 | { | |
defb80d7 | 314 | fprintf (stderr, "%s: ", progname); |
46cec291 RS |
315 | perror ("msgsnd"); |
316 | exit (1); | |
317 | } | |
318 | /* | |
319 | * Now, wait for an answer | |
320 | */ | |
321 | printf ("Waiting for Emacs..."); | |
322 | fflush (stdout); | |
323 | ||
324 | msgrcv (s, msgp, BUFSIZ, getpid (), 0); /* wait for anything back */ | |
325 | strcpy (buf, msgp->mtext); | |
326 | ||
327 | printf ("\n%s\n", buf); | |
328 | exit (0); | |
329 | } | |
330 | ||
331 | #endif /* HAVE_SYSVIPC */ | |
332 | ||
333 | #endif /* HAVE_SOCKETS or HAVE_SYSVIPC */ | |
27711600 RM |
334 | \f |
335 | #ifndef HAVE_STRERROR | |
336 | char * | |
337 | strerror (errnum) | |
338 | int errnum; | |
339 | { | |
340 | extern char *sys_errlist[]; | |
341 | extern int sys_nerr; | |
342 | ||
343 | if (errnum >= 0 && errnum < sys_nerr) | |
344 | return sys_errlist[errnum]; | |
345 | return (char *) "Unknown error"; | |
346 | } | |
347 | ||
348 | #endif /* ! HAVE_STRERROR */ |