Commit | Line | Data |
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f3a0bf5c | 1 | /* Deal with the X Resource Manager. |
d4327fec | 2 | Copyright (C) 1990, 1992 Free Software Foundation. |
f3a0bf5c JB |
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 | |
d4327fec | 6 | the Free Software Foundation; either version 2, or (at your option) |
f3a0bf5c JB |
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> | |
531ff254 JB |
27 | #ifdef VMS |
28 | #include "vms-pwd.h" | |
29 | #else | |
f3a0bf5c | 30 | #include <pwd.h> |
531ff254 | 31 | #endif |
f3a0bf5c | 32 | #include <sys/stat.h> |
265a9e55 | 33 | #include <sys/types.h> |
f3a0bf5c JB |
34 | |
35 | #ifdef emacs | |
36 | #include "config.h" | |
37 | #endif | |
38 | ||
39 | extern char *getenv (); | |
265a9e55 | 40 | extern uid_t getuid (); |
f3a0bf5c JB |
41 | extern struct passwd *getpwuid (); |
42 | extern struct passwd *getpwnam (); | |
43 | ||
44 | static char * | |
45 | gethomedir (dirname) | |
46 | char *dirname; | |
47 | { | |
48 | int uid; | |
49 | struct passwd *pw; | |
50 | char *ptr; | |
51 | ||
52 | if ((ptr = getenv ("HOME")) == NULL) | |
53 | { | |
54 | if ((ptr = getenv ("USER")) != NULL) | |
55 | pw = getpwnam (ptr); | |
56 | else | |
57 | { | |
58 | uid = getuid (); | |
59 | pw = getpwuid (uid); | |
60 | } | |
61 | if (pw) | |
62 | ptr = pw->pw_dir; | |
63 | else | |
64 | { | |
65 | ptr = NULL; | |
66 | *dirname = '\0'; | |
67 | } | |
68 | } | |
69 | ||
70 | if (ptr != NULL) | |
71 | strcpy (dirname, ptr); | |
72 | ||
73 | dirname += strlen (dirname); | |
74 | *dirname = '/'; | |
75 | dirname++; | |
76 | *dirname = '\0'; | |
77 | ||
78 | return dirname; | |
79 | } | |
80 | ||
81 | static int | |
82 | file_p (path) | |
83 | char *path; | |
84 | { | |
85 | struct stat status; | |
86 | ||
87 | return (access (path, R_OK) == 0 /* exists and is readable */ | |
88 | && stat (path, &status) == 0 /* get the status */ | |
89 | && (status.st_mode & S_IFDIR) == 0); /* not a directory */ | |
90 | } | |
91 | ||
92 | #if 0 | |
93 | #define X_DEFAULT_SEARCH_PATH "/usr/lib/X11/" | |
94 | #endif | |
95 | ||
96 | /* Isn't this just disgusting? */ | |
97 | ||
98 | #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" | |
99 | ||
100 | static int | |
101 | decode_magic (string, file, return_path) | |
102 | char *string, *file, *return_path; | |
103 | { | |
104 | char *p = string; | |
105 | char *t = return_path; | |
106 | ||
107 | while (*p) | |
108 | { | |
109 | if (*p == '%') | |
110 | switch (*++p) | |
111 | { | |
112 | case '%': | |
113 | *t++ = '%'; | |
114 | p++; | |
115 | break; | |
116 | ||
117 | case 'N': | |
118 | case 'T': | |
119 | case 'S': | |
120 | case 'L': | |
121 | case 'l': | |
122 | case 't': | |
123 | case 'c': | |
124 | default: | |
125 | p++; | |
126 | if (*t == '/' && *p == '/') | |
127 | p++; | |
128 | break; | |
129 | } | |
130 | else | |
131 | *t++ = *p++; | |
132 | } | |
133 | *t = '\0'; | |
134 | strcat (return_path, file); | |
135 | ||
136 | if (file_p (return_path)) | |
137 | return 1; | |
138 | ||
139 | return_path[0] = '\0'; | |
140 | return 0; | |
141 | } | |
142 | ||
143 | static int | |
144 | magic_searchpath_decoder (incantation_string, file, return_path) | |
145 | char *incantation_string, *return_path, *file; | |
146 | { | |
147 | register char *s = incantation_string; | |
148 | register char *p; | |
d4327fec JB |
149 | |
150 | /* Must be big enough for "%N%S". */ | |
151 | register int string_size = MAXPATHLEN; | |
152 | register char *string = (char *) alloca (string_size * sizeof (*string)); | |
f3a0bf5c JB |
153 | |
154 | while (*s) | |
155 | { | |
156 | p = s; | |
157 | ||
158 | while (*p && *p != ':') | |
159 | p++; | |
160 | ||
161 | if (*p == ':' && *(p + 1) == ':') | |
162 | { | |
d4327fec | 163 | /* We know string is big enough for this. */ |
f3a0bf5c JB |
164 | bcopy ("%N%S", string, 5); |
165 | if (decode_magic (string, file, return_path)) | |
166 | return 1; | |
167 | ||
168 | s = p + 1; | |
169 | continue; | |
170 | } | |
171 | ||
172 | if (p > s) | |
173 | { | |
174 | int len = p - s; | |
175 | ||
d4327fec JB |
176 | if (string_size < len+1) |
177 | { | |
178 | string_size = 2 * len; | |
179 | string = (char *) alloca (string_size * sizeof (*string)); | |
180 | } | |
f3a0bf5c JB |
181 | bcopy (s, string, len); |
182 | string[len + 1] = '\0'; | |
183 | if (decode_magic (string, file, return_path)) | |
184 | return 1; | |
185 | } | |
186 | ||
187 | if (p) | |
188 | s = p + 1; | |
189 | else | |
190 | return 0; | |
191 | } | |
192 | ||
193 | return 0; | |
194 | } | |
195 | \f | |
196 | static XrmDatabase | |
197 | get_system_app (class) | |
198 | char *class; | |
199 | { | |
200 | XrmDatabase db; | |
201 | char path[MAXPATHLEN]; | |
202 | char *p; | |
203 | ||
204 | if ((p = getenv ("XFILESEARCHPATH")) == NULL) | |
205 | p = X_DEFAULT_SEARCH_PATH; | |
206 | ||
207 | if (! magic_searchpath_decoder (p, class, path)) | |
208 | return NULL; | |
209 | ||
210 | db = XrmGetFileDatabase (path); | |
211 | return db; | |
212 | } | |
213 | ||
214 | static XrmDatabase | |
215 | get_fallback (display) | |
216 | Display *display; | |
217 | { | |
218 | XrmDatabase db; | |
219 | ||
220 | return NULL; | |
221 | } | |
222 | ||
223 | static XrmDatabase | |
224 | get_user_app (class) | |
225 | char *class; | |
226 | { | |
227 | XrmDatabase db; | |
228 | char *magic_path; | |
229 | char path[MAXPATHLEN]; | |
230 | ||
231 | if ((magic_path = getenv ("XUSERFILESEARCHPATH")) == NULL) | |
232 | { | |
233 | char homedir[MAXPATHLEN]; | |
234 | char *default_magic; | |
235 | char *p; | |
236 | ||
237 | gethomedir (homedir); | |
238 | ||
239 | if ((p = getenv ("XAPPLRESDIR")) == NULL) | |
240 | { | |
241 | default_magic = "%s/%%L/%%N:%s/%%l/%%N:%s/%%N"; | |
242 | magic_path = (char *) alloca ((3 * strlen (homedir)) | |
243 | + strlen (default_magic)); | |
244 | sprintf (magic_path, default_magic, homedir, homedir, homedir); | |
245 | } | |
246 | else | |
247 | { | |
248 | default_magic = "%s/%%L/%%N:%s/%%l/%%N:%s/%%N:%s/%%N"; | |
249 | magic_path = (char *) alloca ((3 * strlen (p)) | |
250 | + strlen (default_magic) | |
251 | + strlen (homedir)); | |
252 | sprintf (magic_path, default_magic, p, p, p, homedir); | |
253 | } | |
254 | } | |
255 | ||
256 | if (! magic_searchpath_decoder (magic_path, class, path)) | |
257 | return NULL; | |
258 | ||
259 | db = XrmGetFileDatabase (path); | |
260 | return db; | |
261 | } | |
262 | ||
263 | static XrmDatabase | |
264 | get_user_db (display) | |
265 | Display *display; | |
266 | { | |
267 | XrmDatabase db; | |
268 | char *xdefs; | |
269 | ||
270 | xdefs = XResourceManagerString (display); | |
271 | if (xdefs != NULL) | |
272 | db = XrmGetStringDatabase (xdefs); | |
273 | else | |
274 | { | |
275 | char xdefault[MAXPATHLEN]; | |
276 | ||
277 | gethomedir (xdefault); | |
278 | strcat (xdefault, ".Xdefaults"); | |
279 | db = XrmGetFileDatabase (xdefault); | |
280 | } | |
281 | ||
282 | return db; | |
283 | } | |
284 | ||
285 | static XrmDatabase | |
286 | get_environ_db () | |
287 | { | |
288 | XrmDatabase db; | |
289 | char *p; | |
290 | char path[MAXPATHLEN]; | |
291 | ||
292 | if ((p = getenv ("XENVIRONMENT")) == NULL) | |
293 | { | |
294 | gethomedir (path); | |
295 | strcat (path, ".Xdefaults-"); | |
296 | gethostname (path + strlen (path), MAXPATHLEN - strlen (path)); | |
297 | p = path; | |
298 | } | |
299 | ||
300 | db = XrmGetFileDatabase (p); | |
301 | return db; | |
302 | } | |
303 | \f | |
304 | /* Types of values that we can find in a database */ | |
305 | ||
306 | #define XrmStringType "String" /* String representation */ | |
307 | XrmRepresentation x_rm_string; /* Quark representation */ | |
308 | ||
309 | /* Load X resources based on the display and a possible -xrm option. */ | |
310 | ||
311 | XrmDatabase | |
312 | x_load_resources (display, xrm_string, myclass) | |
313 | Display *display; | |
314 | char *xrm_string, *myclass; | |
315 | { | |
316 | char *xdefs; | |
317 | XrmDatabase rdb; | |
318 | XrmDatabase db; | |
319 | ||
320 | x_rm_string = XrmStringToQuark (XrmStringType); | |
321 | XrmInitialize (); | |
322 | rdb = XrmGetStringDatabase (""); | |
323 | ||
324 | /* Get application system defaults */ | |
325 | db = get_system_app (myclass); | |
326 | if (db != NULL) | |
327 | XrmMergeDatabases (db, &rdb); | |
328 | ||
329 | /* Get Fallback resources */ | |
330 | db = get_fallback (display); | |
331 | if (db != NULL) | |
332 | XrmMergeDatabases (db, &rdb); | |
333 | ||
334 | /* Get application user defaults */ | |
335 | db = get_user_app (myclass); | |
336 | if (db != NULL) | |
337 | XrmMergeDatabases (db, &rdb); | |
338 | ||
339 | /* get User defaults */ | |
340 | db = get_user_db (display); | |
341 | if (db != NULL) | |
342 | XrmMergeDatabases (db, &rdb); | |
343 | ||
344 | /* Get Environment defaults. */ | |
345 | db = get_environ_db (); | |
346 | if (db != NULL) | |
347 | XrmMergeDatabases (db, &rdb); | |
348 | ||
349 | /* Last, merge in any specification from the command line. */ | |
350 | if (xrm_string != NULL) | |
351 | { | |
352 | db = XrmGetStringDatabase (xrm_string); | |
353 | if (db != NULL) | |
354 | XrmMergeDatabases (db, &rdb); | |
355 | } | |
356 | ||
357 | return rdb; | |
358 | } | |
359 | ||
360 | /* Retrieve the value of the resource specified by NAME with class CLASS | |
361 | and of type TYPE from database RDB. The value is returned in RET_VALUE. */ | |
362 | ||
363 | int | |
364 | x_get_resource (rdb, name, class, expected_type, ret_value) | |
365 | XrmDatabase rdb; | |
366 | char *name, *class; | |
367 | XrmRepresentation expected_type; | |
368 | XrmValue *ret_value; | |
369 | { | |
370 | XrmValue value; | |
371 | XrmName namelist[100]; | |
372 | XrmClass classlist[100]; | |
373 | XrmRepresentation type; | |
374 | ||
375 | XrmStringToNameList(name, namelist); | |
376 | XrmStringToClassList(class, classlist); | |
377 | ||
378 | if (XrmQGetResource (rdb, namelist, classlist, &type, &value) == True | |
379 | && (type == expected_type)) | |
380 | { | |
381 | if (type == x_rm_string) | |
382 | (char *) ret_value->addr = value.addr; | |
383 | else | |
384 | bcopy (value.addr, ret_value->addr, ret_value->size); | |
385 | ||
386 | return value.size; | |
387 | } | |
388 | ||
389 | return 0; | |
390 | } | |
391 | ||
392 | /* Retrieve the string resource specified by NAME with CLASS from | |
393 | database RDB. */ | |
394 | ||
395 | char * | |
396 | x_get_string_resource (rdb, name, class) | |
397 | XrmDatabase rdb; | |
398 | char *name, *class; | |
399 | { | |
400 | XrmValue value; | |
401 | ||
402 | if (x_get_resource (rdb, name, class, x_rm_string, &value)) | |
403 | return (char *) value.addr; | |
404 | ||
405 | return (char *) 0; | |
406 | } | |
407 | \f | |
408 | #ifdef TESTRM | |
409 | #include <stdio.h> | |
410 | #include "arg-list.h" | |
411 | ||
412 | static void | |
413 | fatal (msg, prog, x1, x2, x3, x4, x5) | |
414 | char *msg, *prog; | |
415 | int x1, x2, x3, x4, x5; | |
416 | { | |
417 | extern int errno; | |
418 | ||
419 | if (errno) | |
420 | perror (prog); | |
421 | ||
422 | (void) fprintf (stderr, msg, prog, x1, x2, x3, x4, x5); | |
423 | exit (1); | |
424 | } | |
425 | ||
426 | main (argc, argv) | |
427 | int argc; | |
428 | char **argv; | |
429 | { | |
430 | Display *display; | |
431 | char *displayname, *resource_string, *class; | |
432 | XrmDatabase xdb; | |
433 | List *arg_list, *lp; | |
434 | ||
435 | arg_list = arg_listify (argc, argv); | |
436 | ||
437 | lp = member ("-d", arg_list); | |
438 | if (!NIL (lp)) | |
439 | displayname = car (cdr (lp)); | |
440 | else | |
441 | displayname = "localhost:0.0"; | |
442 | ||
443 | lp = member ("-xrm", arg_list); | |
444 | if (! NIL (lp)) | |
445 | resource_string = car (cdr (lp)); | |
446 | else | |
447 | resource_string = (char *) 0; | |
448 | ||
449 | lp = member ("-c", arg_list); | |
450 | if (! NIL (lp)) | |
451 | class = car (cdr (lp)); | |
452 | else | |
453 | class = "Emacs"; | |
454 | ||
455 | free_arglist (arg_list); | |
456 | ||
457 | ||
458 | ||
459 | if (!(display = XOpenDisplay (displayname))) | |
460 | fatal ("Can't open display '%s'\n", XDisplayName (displayname)); | |
461 | ||
462 | xdb = x_load_resources (display, resource_string, class); | |
463 | ||
464 | #if 0 | |
465 | /* In a real program, you'd want to also do this: */ | |
466 | display->db = xdb; | |
467 | #endif | |
468 | ||
469 | while (1) | |
470 | { | |
471 | char line[90]; | |
472 | ||
473 | printf ("String: "); | |
474 | gets (line); | |
475 | if (strlen (line)) | |
476 | { | |
477 | char *value = x_get_string_resource (xdb, line, class); | |
478 | ||
479 | if (value != NULL) | |
480 | printf ("\t%s: %s\n\n", line, value); | |
481 | else | |
482 | printf ("\tNo Value.\n\n"); | |
483 | } | |
484 | else | |
485 | break; | |
486 | } | |
487 | printf ("\tExit.\n\n"); | |
488 | ||
489 | XCloseDisplay (display); | |
490 | } | |
491 | #endif /* TESTRM */ |