Commit | Line | Data |
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f3a0bf5c JB |
1 | /* Deal with the X Resource Manager. |
2 | Copyright (C) 1990 Free Software Foundation. | |
3 | ||
4 | This program is free software; you can redistribute it and/or modify | |
5 | it under the terms of the GNU General Public License as published by | |
6 | the Free Software Foundation; either version 1, or (at your option) | |
7 | any later version. | |
8 | ||
9 | This program is distributed in the hope that it will be useful, | |
10 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
11 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
12 | GNU General Public License for more details. | |
13 | ||
14 | You should have received a copy of the GNU General Public License | |
15 | along with this program; see the file COPYING. If not, write to | |
16 | the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. */ | |
17 | ||
18 | /* Written by jla, 4/90 */ | |
19 | ||
20 | #include <X11/Xlib.h> | |
21 | #include <X11/Xatom.h> | |
22 | #include <X11/Xos.h> | |
23 | #include <X11/X.h> | |
24 | #include <X11/Xutil.h> | |
25 | #include <X11/Xresource.h> | |
26 | #include <sys/param.h> | |
27 | #include <pwd.h> | |
28 | #include <sys/stat.h> | |
29 | ||
30 | #ifdef emacs | |
31 | #include "config.h" | |
32 | #endif | |
33 | ||
34 | extern char *getenv (); | |
35 | extern int getuid (); | |
36 | extern struct passwd *getpwuid (); | |
37 | extern struct passwd *getpwnam (); | |
38 | ||
39 | static char * | |
40 | gethomedir (dirname) | |
41 | char *dirname; | |
42 | { | |
43 | int uid; | |
44 | struct passwd *pw; | |
45 | char *ptr; | |
46 | ||
47 | if ((ptr = getenv ("HOME")) == NULL) | |
48 | { | |
49 | if ((ptr = getenv ("USER")) != NULL) | |
50 | pw = getpwnam (ptr); | |
51 | else | |
52 | { | |
53 | uid = getuid (); | |
54 | pw = getpwuid (uid); | |
55 | } | |
56 | if (pw) | |
57 | ptr = pw->pw_dir; | |
58 | else | |
59 | { | |
60 | ptr = NULL; | |
61 | *dirname = '\0'; | |
62 | } | |
63 | } | |
64 | ||
65 | if (ptr != NULL) | |
66 | strcpy (dirname, ptr); | |
67 | ||
68 | dirname += strlen (dirname); | |
69 | *dirname = '/'; | |
70 | dirname++; | |
71 | *dirname = '\0'; | |
72 | ||
73 | return dirname; | |
74 | } | |
75 | ||
76 | static int | |
77 | file_p (path) | |
78 | char *path; | |
79 | { | |
80 | struct stat status; | |
81 | ||
82 | return (access (path, R_OK) == 0 /* exists and is readable */ | |
83 | && stat (path, &status) == 0 /* get the status */ | |
84 | && (status.st_mode & S_IFDIR) == 0); /* not a directory */ | |
85 | } | |
86 | ||
87 | #if 0 | |
88 | #define X_DEFAULT_SEARCH_PATH "/usr/lib/X11/" | |
89 | #endif | |
90 | ||
91 | /* Isn't this just disgusting? */ | |
92 | ||
93 | #define X_DEFAULT_SEARCH_PATH "/usr/lib/X11/%L/%T/%N%S:/usr/lib/X11/%l/%T/%N%S:/usr/lib/X11/%T/%N%S" | |
94 | ||
95 | static int | |
96 | decode_magic (string, file, return_path) | |
97 | char *string, *file, *return_path; | |
98 | { | |
99 | char *p = string; | |
100 | char *t = return_path; | |
101 | ||
102 | while (*p) | |
103 | { | |
104 | if (*p == '%') | |
105 | switch (*++p) | |
106 | { | |
107 | case '%': | |
108 | *t++ = '%'; | |
109 | p++; | |
110 | break; | |
111 | ||
112 | case 'N': | |
113 | case 'T': | |
114 | case 'S': | |
115 | case 'L': | |
116 | case 'l': | |
117 | case 't': | |
118 | case 'c': | |
119 | default: | |
120 | p++; | |
121 | if (*t == '/' && *p == '/') | |
122 | p++; | |
123 | break; | |
124 | } | |
125 | else | |
126 | *t++ = *p++; | |
127 | } | |
128 | *t = '\0'; | |
129 | strcat (return_path, file); | |
130 | ||
131 | if (file_p (return_path)) | |
132 | return 1; | |
133 | ||
134 | return_path[0] = '\0'; | |
135 | return 0; | |
136 | } | |
137 | ||
138 | static int | |
139 | magic_searchpath_decoder (incantation_string, file, return_path) | |
140 | char *incantation_string, *return_path, *file; | |
141 | { | |
142 | register char *s = incantation_string; | |
143 | register char *p; | |
144 | register char string[MAXPATHLEN]; | |
145 | ||
146 | while (*s) | |
147 | { | |
148 | p = s; | |
149 | ||
150 | while (*p && *p != ':') | |
151 | p++; | |
152 | ||
153 | if (*p == ':' && *(p + 1) == ':') | |
154 | { | |
155 | bcopy ("%N%S", string, 5); | |
156 | if (decode_magic (string, file, return_path)) | |
157 | return 1; | |
158 | ||
159 | s = p + 1; | |
160 | continue; | |
161 | } | |
162 | ||
163 | if (p > s) | |
164 | { | |
165 | int len = p - s; | |
166 | ||
167 | bcopy (s, string, len); | |
168 | string[len + 1] = '\0'; | |
169 | if (decode_magic (string, file, return_path)) | |
170 | return 1; | |
171 | } | |
172 | ||
173 | if (p) | |
174 | s = p + 1; | |
175 | else | |
176 | return 0; | |
177 | } | |
178 | ||
179 | return 0; | |
180 | } | |
181 | \f | |
182 | static XrmDatabase | |
183 | get_system_app (class) | |
184 | char *class; | |
185 | { | |
186 | XrmDatabase db; | |
187 | char path[MAXPATHLEN]; | |
188 | char *p; | |
189 | ||
190 | if ((p = getenv ("XFILESEARCHPATH")) == NULL) | |
191 | p = X_DEFAULT_SEARCH_PATH; | |
192 | ||
193 | if (! magic_searchpath_decoder (p, class, path)) | |
194 | return NULL; | |
195 | ||
196 | db = XrmGetFileDatabase (path); | |
197 | return db; | |
198 | } | |
199 | ||
200 | static XrmDatabase | |
201 | get_fallback (display) | |
202 | Display *display; | |
203 | { | |
204 | XrmDatabase db; | |
205 | ||
206 | return NULL; | |
207 | } | |
208 | ||
209 | static XrmDatabase | |
210 | get_user_app (class) | |
211 | char *class; | |
212 | { | |
213 | XrmDatabase db; | |
214 | char *magic_path; | |
215 | char path[MAXPATHLEN]; | |
216 | ||
217 | if ((magic_path = getenv ("XUSERFILESEARCHPATH")) == NULL) | |
218 | { | |
219 | char homedir[MAXPATHLEN]; | |
220 | char *default_magic; | |
221 | char *p; | |
222 | ||
223 | gethomedir (homedir); | |
224 | ||
225 | if ((p = getenv ("XAPPLRESDIR")) == NULL) | |
226 | { | |
227 | default_magic = "%s/%%L/%%N:%s/%%l/%%N:%s/%%N"; | |
228 | magic_path = (char *) alloca ((3 * strlen (homedir)) | |
229 | + strlen (default_magic)); | |
230 | sprintf (magic_path, default_magic, homedir, homedir, homedir); | |
231 | } | |
232 | else | |
233 | { | |
234 | default_magic = "%s/%%L/%%N:%s/%%l/%%N:%s/%%N:%s/%%N"; | |
235 | magic_path = (char *) alloca ((3 * strlen (p)) | |
236 | + strlen (default_magic) | |
237 | + strlen (homedir)); | |
238 | sprintf (magic_path, default_magic, p, p, p, homedir); | |
239 | } | |
240 | } | |
241 | ||
242 | if (! magic_searchpath_decoder (magic_path, class, path)) | |
243 | return NULL; | |
244 | ||
245 | db = XrmGetFileDatabase (path); | |
246 | return db; | |
247 | } | |
248 | ||
249 | static XrmDatabase | |
250 | get_user_db (display) | |
251 | Display *display; | |
252 | { | |
253 | XrmDatabase db; | |
254 | char *xdefs; | |
255 | ||
256 | xdefs = XResourceManagerString (display); | |
257 | if (xdefs != NULL) | |
258 | db = XrmGetStringDatabase (xdefs); | |
259 | else | |
260 | { | |
261 | char xdefault[MAXPATHLEN]; | |
262 | ||
263 | gethomedir (xdefault); | |
264 | strcat (xdefault, ".Xdefaults"); | |
265 | db = XrmGetFileDatabase (xdefault); | |
266 | } | |
267 | ||
268 | return db; | |
269 | } | |
270 | ||
271 | static XrmDatabase | |
272 | get_environ_db () | |
273 | { | |
274 | XrmDatabase db; | |
275 | char *p; | |
276 | char path[MAXPATHLEN]; | |
277 | ||
278 | if ((p = getenv ("XENVIRONMENT")) == NULL) | |
279 | { | |
280 | gethomedir (path); | |
281 | strcat (path, ".Xdefaults-"); | |
282 | gethostname (path + strlen (path), MAXPATHLEN - strlen (path)); | |
283 | p = path; | |
284 | } | |
285 | ||
286 | db = XrmGetFileDatabase (p); | |
287 | return db; | |
288 | } | |
289 | \f | |
290 | /* Types of values that we can find in a database */ | |
291 | ||
292 | #define XrmStringType "String" /* String representation */ | |
293 | XrmRepresentation x_rm_string; /* Quark representation */ | |
294 | ||
295 | /* Load X resources based on the display and a possible -xrm option. */ | |
296 | ||
297 | XrmDatabase | |
298 | x_load_resources (display, xrm_string, myclass) | |
299 | Display *display; | |
300 | char *xrm_string, *myclass; | |
301 | { | |
302 | char *xdefs; | |
303 | XrmDatabase rdb; | |
304 | XrmDatabase db; | |
305 | ||
306 | x_rm_string = XrmStringToQuark (XrmStringType); | |
307 | XrmInitialize (); | |
308 | rdb = XrmGetStringDatabase (""); | |
309 | ||
310 | /* Get application system defaults */ | |
311 | db = get_system_app (myclass); | |
312 | if (db != NULL) | |
313 | XrmMergeDatabases (db, &rdb); | |
314 | ||
315 | /* Get Fallback resources */ | |
316 | db = get_fallback (display); | |
317 | if (db != NULL) | |
318 | XrmMergeDatabases (db, &rdb); | |
319 | ||
320 | /* Get application user defaults */ | |
321 | db = get_user_app (myclass); | |
322 | if (db != NULL) | |
323 | XrmMergeDatabases (db, &rdb); | |
324 | ||
325 | /* get User defaults */ | |
326 | db = get_user_db (display); | |
327 | if (db != NULL) | |
328 | XrmMergeDatabases (db, &rdb); | |
329 | ||
330 | /* Get Environment defaults. */ | |
331 | db = get_environ_db (); | |
332 | if (db != NULL) | |
333 | XrmMergeDatabases (db, &rdb); | |
334 | ||
335 | /* Last, merge in any specification from the command line. */ | |
336 | if (xrm_string != NULL) | |
337 | { | |
338 | db = XrmGetStringDatabase (xrm_string); | |
339 | if (db != NULL) | |
340 | XrmMergeDatabases (db, &rdb); | |
341 | } | |
342 | ||
343 | return rdb; | |
344 | } | |
345 | ||
346 | /* Retrieve the value of the resource specified by NAME with class CLASS | |
347 | and of type TYPE from database RDB. The value is returned in RET_VALUE. */ | |
348 | ||
349 | int | |
350 | x_get_resource (rdb, name, class, expected_type, ret_value) | |
351 | XrmDatabase rdb; | |
352 | char *name, *class; | |
353 | XrmRepresentation expected_type; | |
354 | XrmValue *ret_value; | |
355 | { | |
356 | XrmValue value; | |
357 | XrmName namelist[100]; | |
358 | XrmClass classlist[100]; | |
359 | XrmRepresentation type; | |
360 | ||
361 | XrmStringToNameList(name, namelist); | |
362 | XrmStringToClassList(class, classlist); | |
363 | ||
364 | if (XrmQGetResource (rdb, namelist, classlist, &type, &value) == True | |
365 | && (type == expected_type)) | |
366 | { | |
367 | if (type == x_rm_string) | |
368 | (char *) ret_value->addr = value.addr; | |
369 | else | |
370 | bcopy (value.addr, ret_value->addr, ret_value->size); | |
371 | ||
372 | return value.size; | |
373 | } | |
374 | ||
375 | return 0; | |
376 | } | |
377 | ||
378 | /* Retrieve the string resource specified by NAME with CLASS from | |
379 | database RDB. */ | |
380 | ||
381 | char * | |
382 | x_get_string_resource (rdb, name, class) | |
383 | XrmDatabase rdb; | |
384 | char *name, *class; | |
385 | { | |
386 | XrmValue value; | |
387 | ||
388 | if (x_get_resource (rdb, name, class, x_rm_string, &value)) | |
389 | return (char *) value.addr; | |
390 | ||
391 | return (char *) 0; | |
392 | } | |
393 | \f | |
394 | #ifdef TESTRM | |
395 | #include <stdio.h> | |
396 | #include "arg-list.h" | |
397 | ||
398 | static void | |
399 | fatal (msg, prog, x1, x2, x3, x4, x5) | |
400 | char *msg, *prog; | |
401 | int x1, x2, x3, x4, x5; | |
402 | { | |
403 | extern int errno; | |
404 | ||
405 | if (errno) | |
406 | perror (prog); | |
407 | ||
408 | (void) fprintf (stderr, msg, prog, x1, x2, x3, x4, x5); | |
409 | exit (1); | |
410 | } | |
411 | ||
412 | main (argc, argv) | |
413 | int argc; | |
414 | char **argv; | |
415 | { | |
416 | Display *display; | |
417 | char *displayname, *resource_string, *class; | |
418 | XrmDatabase xdb; | |
419 | List *arg_list, *lp; | |
420 | ||
421 | arg_list = arg_listify (argc, argv); | |
422 | ||
423 | lp = member ("-d", arg_list); | |
424 | if (!NIL (lp)) | |
425 | displayname = car (cdr (lp)); | |
426 | else | |
427 | displayname = "localhost:0.0"; | |
428 | ||
429 | lp = member ("-xrm", arg_list); | |
430 | if (! NIL (lp)) | |
431 | resource_string = car (cdr (lp)); | |
432 | else | |
433 | resource_string = (char *) 0; | |
434 | ||
435 | lp = member ("-c", arg_list); | |
436 | if (! NIL (lp)) | |
437 | class = car (cdr (lp)); | |
438 | else | |
439 | class = "Emacs"; | |
440 | ||
441 | free_arglist (arg_list); | |
442 | ||
443 | ||
444 | ||
445 | if (!(display = XOpenDisplay (displayname))) | |
446 | fatal ("Can't open display '%s'\n", XDisplayName (displayname)); | |
447 | ||
448 | xdb = x_load_resources (display, resource_string, class); | |
449 | ||
450 | #if 0 | |
451 | /* In a real program, you'd want to also do this: */ | |
452 | display->db = xdb; | |
453 | #endif | |
454 | ||
455 | while (1) | |
456 | { | |
457 | char line[90]; | |
458 | ||
459 | printf ("String: "); | |
460 | gets (line); | |
461 | if (strlen (line)) | |
462 | { | |
463 | char *value = x_get_string_resource (xdb, line, class); | |
464 | ||
465 | if (value != NULL) | |
466 | printf ("\t%s: %s\n\n", line, value); | |
467 | else | |
468 | printf ("\tNo Value.\n\n"); | |
469 | } | |
470 | else | |
471 | break; | |
472 | } | |
473 | printf ("\tExit.\n\n"); | |
474 | ||
475 | XCloseDisplay (display); | |
476 | } | |
477 | #endif /* TESTRM */ |