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 | ||
30 | #if !defined(HAVE_SOCKETS) && !defined(HAVE_SYSVIPC) | |
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 | ||
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 | 55 | extern char *strerror (); |
46cec291 RS |
56 | extern int errno; |
57 | ||
58 | main (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 | ||
180 | main (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 | |
287 | char * | |
288 | strerror (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 */ |