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