| 1 | /* Deal with the X Resource Manager. |
| 2 | Copyright (C) 1990, 1993-1994, 2000-2014 Free Software Foundation, |
| 3 | Inc. |
| 4 | |
| 5 | Author: Joseph Arceneaux |
| 6 | Created: 4/90 |
| 7 | |
| 8 | This file is part of GNU Emacs. |
| 9 | |
| 10 | GNU Emacs is free software: you can redistribute it and/or modify |
| 11 | it under the terms of the GNU General Public License as published by |
| 12 | the Free Software Foundation, either version 3 of the License, or |
| 13 | (at your option) any later version. |
| 14 | |
| 15 | GNU Emacs is distributed in the hope that it will be useful, |
| 16 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 17 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 18 | GNU General Public License for more details. |
| 19 | |
| 20 | You should have received a copy of the GNU General Public License |
| 21 | along with GNU Emacs. If not, see <http://www.gnu.org/licenses/>. */ |
| 22 | |
| 23 | #include <config.h> |
| 24 | |
| 25 | #include <unistd.h> |
| 26 | #include <errno.h> |
| 27 | #include <epaths.h> |
| 28 | #include <stdlib.h> |
| 29 | #include <stdio.h> |
| 30 | |
| 31 | #include "lisp.h" |
| 32 | |
| 33 | /* This may include sys/types.h, and that somehow loses |
| 34 | if this is not done before the other system files. */ |
| 35 | #include "xterm.h" |
| 36 | |
| 37 | #include <X11/Xlib.h> |
| 38 | #include <X11/Xatom.h> |
| 39 | #include <X11/X.h> |
| 40 | #include <X11/Xutil.h> |
| 41 | #include <X11/Xresource.h> |
| 42 | #ifdef HAVE_PWD_H |
| 43 | #include <pwd.h> |
| 44 | #endif |
| 45 | |
| 46 | #ifdef USE_MOTIF |
| 47 | /* For Vdouble_click_time. */ |
| 48 | #include "keyboard.h" |
| 49 | #endif |
| 50 | |
| 51 | /* X file search path processing. */ |
| 52 | |
| 53 | |
| 54 | /* The string which gets substituted for the %C escape in XFILESEARCHPATH |
| 55 | and friends, or zero if none was specified. */ |
| 56 | static char *x_customization_string; |
| 57 | |
| 58 | |
| 59 | /* Return the value of the emacs.customization (Emacs.Customization) |
| 60 | resource, for later use in search path decoding. If we find no |
| 61 | such resource, return zero. */ |
| 62 | static char * |
| 63 | x_get_customization_string (XrmDatabase db, const char *name, |
| 64 | const char *class) |
| 65 | { |
| 66 | char *full_name = alloca (strlen (name) + sizeof "customization" + 3); |
| 67 | char *full_class = alloca (strlen (class) + sizeof "Customization" + 3); |
| 68 | char *result; |
| 69 | |
| 70 | sprintf (full_name, "%s.%s", name, "customization"); |
| 71 | sprintf (full_class, "%s.%s", class, "Customization"); |
| 72 | |
| 73 | result = x_get_string_resource (db, full_name, full_class); |
| 74 | return result ? xstrdup (result) : NULL; |
| 75 | } |
| 76 | |
| 77 | /* Expand all the Xt-style %-escapes in STRING, whose length is given |
| 78 | by STRING_LEN. Here are the escapes we're supposed to recognize: |
| 79 | |
| 80 | %N The value of the application's class name |
| 81 | %T The value of the type parameter ("app-defaults" in this |
| 82 | context) |
| 83 | %S The value of the suffix parameter ("" in this context) |
| 84 | %L The language string associated with the specified display |
| 85 | (We use the "LANG" environment variable here, if it's set.) |
| 86 | %l The language part of the display's language string |
| 87 | (We treat this just like %L. If someone can tell us what |
| 88 | we're really supposed to do, dandy.) |
| 89 | %t The territory part of the display's language string |
| 90 | (This never gets used.) |
| 91 | %c The codeset part of the display's language string |
| 92 | (This never gets used either.) |
| 93 | %C The customization string retrieved from the resource |
| 94 | database associated with display. |
| 95 | (This is x_customization_string.) |
| 96 | |
| 97 | Return the resource database if its file was read successfully, and |
| 98 | refers to %L only when the LANG environment variable is set, or |
| 99 | otherwise provided by X. |
| 100 | |
| 101 | ESCAPED_SUFFIX is postpended to STRING if it is non-zero. |
| 102 | %-escapes in ESCAPED_SUFFIX are expanded. |
| 103 | |
| 104 | Return NULL otherwise. */ |
| 105 | |
| 106 | static XrmDatabase |
| 107 | magic_db (const char *string, ptrdiff_t string_len, const char *class, |
| 108 | const char *escaped_suffix) |
| 109 | { |
| 110 | XrmDatabase db; |
| 111 | char *lang = getenv ("LANG"); |
| 112 | |
| 113 | ptrdiff_t path_size = 100; |
| 114 | char *path = xmalloc_atomic (path_size); |
| 115 | ptrdiff_t path_len = 0; |
| 116 | |
| 117 | const char *p = string; |
| 118 | |
| 119 | while (p < string + string_len) |
| 120 | { |
| 121 | /* The chunk we're about to stick on the end of result. */ |
| 122 | const char *next = NULL; |
| 123 | ptrdiff_t next_len; |
| 124 | |
| 125 | if (*p == '%') |
| 126 | { |
| 127 | p++; |
| 128 | |
| 129 | if (p >= string + string_len) |
| 130 | next_len = 0; |
| 131 | else |
| 132 | switch (*p) |
| 133 | { |
| 134 | case '%': |
| 135 | next = "%"; |
| 136 | next_len = 1; |
| 137 | break; |
| 138 | |
| 139 | case 'C': |
| 140 | next = (x_customization_string |
| 141 | ? x_customization_string |
| 142 | : ""); |
| 143 | next_len = strlen (next); |
| 144 | break; |
| 145 | |
| 146 | case 'N': |
| 147 | next = class; |
| 148 | next_len = strlen (class); |
| 149 | break; |
| 150 | |
| 151 | case 'T': |
| 152 | next = "app-defaults"; |
| 153 | next_len = strlen (next); |
| 154 | break; |
| 155 | |
| 156 | default: |
| 157 | case 'S': |
| 158 | next_len = 0; |
| 159 | break; |
| 160 | |
| 161 | case 'L': |
| 162 | case 'l': |
| 163 | if (! lang) |
| 164 | { |
| 165 | xfree (path); |
| 166 | return NULL; |
| 167 | } |
| 168 | |
| 169 | next = lang; |
| 170 | next_len = strlen (next); |
| 171 | break; |
| 172 | |
| 173 | case 't': |
| 174 | case 'c': |
| 175 | xfree (path); |
| 176 | return NULL; |
| 177 | } |
| 178 | } |
| 179 | else |
| 180 | next = p, next_len = 1; |
| 181 | |
| 182 | /* Do we have room for this component followed by a '\0'? */ |
| 183 | if (path_size - path_len <= next_len) |
| 184 | { |
| 185 | if (min (PTRDIFF_MAX, SIZE_MAX) / 2 - 1 - path_len < next_len) |
| 186 | memory_full (SIZE_MAX); |
| 187 | path_size = (path_len + next_len + 1) * 2; |
| 188 | path = xrealloc (path, path_size); |
| 189 | } |
| 190 | |
| 191 | memcpy (path + path_len, next, next_len); |
| 192 | path_len += next_len; |
| 193 | |
| 194 | p++; |
| 195 | |
| 196 | /* If we've reached the end of the string, append ESCAPED_SUFFIX. */ |
| 197 | if (p >= string + string_len && escaped_suffix) |
| 198 | { |
| 199 | string = escaped_suffix; |
| 200 | string_len = strlen (string); |
| 201 | p = string; |
| 202 | escaped_suffix = NULL; |
| 203 | } |
| 204 | } |
| 205 | |
| 206 | path[path_len] = '\0'; |
| 207 | db = XrmGetFileDatabase (path); |
| 208 | xfree (path); |
| 209 | return db; |
| 210 | } |
| 211 | |
| 212 | |
| 213 | static char * |
| 214 | gethomedir (void) |
| 215 | { |
| 216 | struct passwd *pw; |
| 217 | char *ptr; |
| 218 | char *copy; |
| 219 | |
| 220 | if ((ptr = getenv ("HOME")) == NULL) |
| 221 | { |
| 222 | if ((ptr = getenv ("LOGNAME")) != NULL |
| 223 | || (ptr = getenv ("USER")) != NULL) |
| 224 | pw = getpwnam (ptr); |
| 225 | else |
| 226 | pw = getpwuid (getuid ()); |
| 227 | |
| 228 | if (pw) |
| 229 | ptr = pw->pw_dir; |
| 230 | } |
| 231 | |
| 232 | if (ptr == NULL) |
| 233 | return xstrdup ("/"); |
| 234 | |
| 235 | copy = xmalloc_atomic (strlen (ptr) + 2); |
| 236 | strcpy (copy, ptr); |
| 237 | return strcat (copy, "/"); |
| 238 | } |
| 239 | |
| 240 | |
| 241 | /* Find the first element of SEARCH_PATH which exists and is readable, |
| 242 | after expanding the %-escapes. Return 0 if we didn't find any, and |
| 243 | the path name of the one we found otherwise. */ |
| 244 | |
| 245 | static XrmDatabase |
| 246 | search_magic_path (const char *search_path, const char *class, |
| 247 | const char *escaped_suffix) |
| 248 | { |
| 249 | const char *s, *p; |
| 250 | |
| 251 | for (s = search_path; *s; s = p) |
| 252 | { |
| 253 | for (p = s; *p && *p != ':'; p++) |
| 254 | ; |
| 255 | |
| 256 | if (p > s) |
| 257 | { |
| 258 | XrmDatabase db = magic_db (s, p - s, class, escaped_suffix); |
| 259 | if (db) |
| 260 | return db; |
| 261 | } |
| 262 | else if (*p == ':') |
| 263 | { |
| 264 | static char const ns[] = "%N%S"; |
| 265 | XrmDatabase db = magic_db (ns, strlen (ns), class, escaped_suffix); |
| 266 | if (db) |
| 267 | return db; |
| 268 | } |
| 269 | |
| 270 | if (*p == ':') |
| 271 | p++; |
| 272 | } |
| 273 | |
| 274 | return 0; |
| 275 | } |
| 276 | \f |
| 277 | /* Producing databases for individual sources. */ |
| 278 | |
| 279 | static XrmDatabase |
| 280 | get_system_app (const char *class) |
| 281 | { |
| 282 | const char *path; |
| 283 | |
| 284 | path = getenv ("XFILESEARCHPATH"); |
| 285 | if (! path) path = PATH_X_DEFAULTS; |
| 286 | |
| 287 | return search_magic_path (path, class, 0); |
| 288 | } |
| 289 | |
| 290 | |
| 291 | static XrmDatabase |
| 292 | get_fallback (Display *display) |
| 293 | { |
| 294 | return NULL; |
| 295 | } |
| 296 | |
| 297 | |
| 298 | static XrmDatabase |
| 299 | get_user_app (const char *class) |
| 300 | { |
| 301 | XrmDatabase db = 0; |
| 302 | const char *path; |
| 303 | |
| 304 | /* Check for XUSERFILESEARCHPATH. It is a path of complete file |
| 305 | names, not directories. */ |
| 306 | path = getenv ("XUSERFILESEARCHPATH"); |
| 307 | if (path) |
| 308 | db = search_magic_path (path, class, 0); |
| 309 | |
| 310 | if (! db) |
| 311 | { |
| 312 | /* Check for APPLRESDIR; it is a path of directories. In each, |
| 313 | we have to search for LANG/CLASS and then CLASS. */ |
| 314 | path = getenv ("XAPPLRESDIR"); |
| 315 | if (path) |
| 316 | { |
| 317 | db = search_magic_path (path, class, "/%L/%N"); |
| 318 | if (!db) |
| 319 | db = search_magic_path (path, class, "/%N"); |
| 320 | } |
| 321 | } |
| 322 | |
| 323 | if (! db) |
| 324 | { |
| 325 | /* Check in the home directory. This is a bit of a hack; let's |
| 326 | hope one's home directory doesn't contain any %-escapes. */ |
| 327 | char *home = gethomedir (); |
| 328 | db = search_magic_path (home, class, "%L/%N"); |
| 329 | if (! db) |
| 330 | db = search_magic_path (home, class, "%N"); |
| 331 | xfree (home); |
| 332 | } |
| 333 | |
| 334 | return db; |
| 335 | } |
| 336 | |
| 337 | |
| 338 | static XrmDatabase |
| 339 | get_user_db (Display *display) |
| 340 | { |
| 341 | XrmDatabase db; |
| 342 | char *xdefs; |
| 343 | |
| 344 | #ifdef PBaseSize /* Cheap way to test for X11R4 or later. */ |
| 345 | xdefs = XResourceManagerString (display); |
| 346 | #else |
| 347 | xdefs = display->xdefaults; |
| 348 | #endif |
| 349 | |
| 350 | if (xdefs != NULL) |
| 351 | db = XrmGetStringDatabase (xdefs); |
| 352 | else |
| 353 | { |
| 354 | char *home; |
| 355 | char *xdefault; |
| 356 | |
| 357 | home = gethomedir (); |
| 358 | xdefault = xmalloc_atomic (strlen (home) + sizeof (".Xdefaults")); |
| 359 | strcpy (xdefault, home); |
| 360 | strcat (xdefault, ".Xdefaults"); |
| 361 | db = XrmGetFileDatabase (xdefault); |
| 362 | xfree (home); |
| 363 | xfree (xdefault); |
| 364 | } |
| 365 | |
| 366 | #ifdef HAVE_XSCREENRESOURCESTRING |
| 367 | /* Get the screen-specific resources too. */ |
| 368 | xdefs = XScreenResourceString (DefaultScreenOfDisplay (display)); |
| 369 | if (xdefs != NULL) |
| 370 | { |
| 371 | XrmMergeDatabases (XrmGetStringDatabase (xdefs), &db); |
| 372 | XFree (xdefs); |
| 373 | } |
| 374 | #endif |
| 375 | |
| 376 | return db; |
| 377 | } |
| 378 | |
| 379 | static XrmDatabase |
| 380 | get_environ_db (void) |
| 381 | { |
| 382 | XrmDatabase db; |
| 383 | char *p; |
| 384 | char *path = 0; |
| 385 | |
| 386 | if ((p = getenv ("XENVIRONMENT")) == NULL) |
| 387 | { |
| 388 | static char const xdefaults[] = ".Xdefaults-"; |
| 389 | char *home = gethomedir (); |
| 390 | char const *host = SSDATA (Vsystem_name); |
| 391 | ptrdiff_t pathsize = (strlen (home) + sizeof xdefaults |
| 392 | + SBYTES (Vsystem_name)); |
| 393 | path = xrealloc (home, pathsize); |
| 394 | strcat (strcat (path, xdefaults), host); |
| 395 | p = path; |
| 396 | } |
| 397 | |
| 398 | db = XrmGetFileDatabase (p); |
| 399 | |
| 400 | xfree (path); |
| 401 | |
| 402 | return db; |
| 403 | } |
| 404 | \f |
| 405 | /* External interface. */ |
| 406 | |
| 407 | /* Types of values that we can find in a database */ |
| 408 | |
| 409 | #define XrmStringType "String" /* String representation */ |
| 410 | static XrmRepresentation x_rm_string; /* Quark representation */ |
| 411 | |
| 412 | /* Load X resources based on the display and a possible -xrm option. */ |
| 413 | |
| 414 | XrmDatabase |
| 415 | x_load_resources (Display *display, const char *xrm_string, |
| 416 | const char *myname, const char *myclass) |
| 417 | { |
| 418 | XrmDatabase user_database; |
| 419 | XrmDatabase rdb; |
| 420 | XrmDatabase db; |
| 421 | char line[256]; |
| 422 | |
| 423 | #if defined USE_MOTIF || !defined HAVE_XFT || !defined USE_LUCID |
| 424 | const char *helv = "-*-helvetica-medium-r-*--*-120-*-*-*-*-iso8859-1"; |
| 425 | #endif |
| 426 | |
| 427 | #ifdef USE_MOTIF |
| 428 | const char *courier = "-*-courier-medium-r-*-*-*-120-*-*-*-*-iso8859-1"; |
| 429 | #endif |
| 430 | |
| 431 | x_rm_string = XrmStringToQuark (XrmStringType); |
| 432 | #ifndef USE_X_TOOLKIT |
| 433 | /* pmr@osf.org says this shouldn't be done if USE_X_TOOLKIT. |
| 434 | I suspect it's because the toolkit version does this elsewhere. */ |
| 435 | XrmInitialize (); |
| 436 | #endif |
| 437 | rdb = XrmGetStringDatabase (""); |
| 438 | |
| 439 | /* Add some font defaults. If the font `helv' doesn't exist, widgets |
| 440 | will use some other default font. */ |
| 441 | #ifdef USE_MOTIF |
| 442 | |
| 443 | sprintf (line, "%s.pane.background: grey75", myclass); |
| 444 | XrmPutLineResource (&rdb, line); |
| 445 | sprintf (line, "%s*fontList: %s", myclass, helv); |
| 446 | XrmPutLineResource (&rdb, line); |
| 447 | sprintf (line, "%s*menu*background: grey75", myclass); |
| 448 | XrmPutLineResource (&rdb, line); |
| 449 | sprintf (line, "%s*menubar*background: grey75", myclass); |
| 450 | XrmPutLineResource (&rdb, line); |
| 451 | sprintf (line, "%s*verticalScrollBar.background: grey75", myclass); |
| 452 | XrmPutLineResource (&rdb, line); |
| 453 | sprintf (line, "%s*verticalScrollBar.troughColor: grey75", myclass); |
| 454 | XrmPutLineResource (&rdb, line); |
| 455 | sprintf (line, "%s.dialog*.background: grey75", myclass); |
| 456 | XrmPutLineResource (&rdb, line); |
| 457 | sprintf (line, "%s*fsb.Text.background: white", myclass); |
| 458 | XrmPutLineResource (&rdb, line); |
| 459 | sprintf (line, "%s*fsb.FilterText.background: white", myclass); |
| 460 | XrmPutLineResource (&rdb, line); |
| 461 | sprintf (line, "%s*fsb*DirList.background: white", myclass); |
| 462 | XrmPutLineResource (&rdb, line); |
| 463 | sprintf (line, "%s*fsb*ItemsList.background: white", myclass); |
| 464 | XrmPutLineResource (&rdb, line); |
| 465 | sprintf (line, "%s*fsb*background: grey75", myclass); |
| 466 | XrmPutLineResource (&rdb, line); |
| 467 | sprintf (line, "%s*fsb.Text.fontList: %s", myclass, courier); |
| 468 | XrmPutLineResource (&rdb, line); |
| 469 | sprintf (line, "%s*fsb.FilterText.fontList: %s", myclass, courier); |
| 470 | XrmPutLineResource (&rdb, line); |
| 471 | sprintf (line, "%s*fsb*ItemsList.fontList: %s", myclass, courier); |
| 472 | XrmPutLineResource (&rdb, line); |
| 473 | sprintf (line, "%s*fsb*DirList.fontList: %s", myclass, courier); |
| 474 | XrmPutLineResource (&rdb, line); |
| 475 | |
| 476 | /* Set double click time of list boxes in the file selection |
| 477 | dialog from `double-click-time'. */ |
| 478 | if (INTEGERP (Vdouble_click_time) && XINT (Vdouble_click_time) > 0) |
| 479 | { |
| 480 | sprintf (line, "%s*fsb*DirList.doubleClickInterval: %"pI"d", |
| 481 | myclass, XFASTINT (Vdouble_click_time)); |
| 482 | XrmPutLineResource (&rdb, line); |
| 483 | sprintf (line, "%s*fsb*ItemsList.doubleClickInterval: %"pI"d", |
| 484 | myclass, XFASTINT (Vdouble_click_time)); |
| 485 | XrmPutLineResource (&rdb, line); |
| 486 | } |
| 487 | |
| 488 | #else /* not USE_MOTIF */ |
| 489 | |
| 490 | sprintf (line, "Emacs.dialog*.background: grey75"); |
| 491 | XrmPutLineResource (&rdb, line); |
| 492 | #if !defined (HAVE_XFT) || !defined (USE_LUCID) |
| 493 | sprintf (line, "Emacs.dialog*.font: %s", helv); |
| 494 | XrmPutLineResource (&rdb, line); |
| 495 | sprintf (line, "*XlwMenu*font: %s", helv); |
| 496 | XrmPutLineResource (&rdb, line); |
| 497 | #endif |
| 498 | sprintf (line, "*XlwMenu*background: grey75"); |
| 499 | XrmPutLineResource (&rdb, line); |
| 500 | sprintf (line, "Emacs*verticalScrollBar.background: grey75"); |
| 501 | XrmPutLineResource (&rdb, line); |
| 502 | |
| 503 | #endif /* not USE_MOTIF */ |
| 504 | |
| 505 | user_database = get_user_db (display); |
| 506 | |
| 507 | /* Figure out what the "customization string" is, so we can use it |
| 508 | to decode paths. */ |
| 509 | xfree (x_customization_string); |
| 510 | x_customization_string |
| 511 | = x_get_customization_string (user_database, myname, myclass); |
| 512 | |
| 513 | /* Get application system defaults */ |
| 514 | db = get_system_app (myclass); |
| 515 | if (db != NULL) |
| 516 | XrmMergeDatabases (db, &rdb); |
| 517 | |
| 518 | /* Get Fallback resources */ |
| 519 | db = get_fallback (display); |
| 520 | if (db != NULL) |
| 521 | XrmMergeDatabases (db, &rdb); |
| 522 | |
| 523 | /* Get application user defaults */ |
| 524 | db = get_user_app (myclass); |
| 525 | if (db != NULL) |
| 526 | XrmMergeDatabases (db, &rdb); |
| 527 | |
| 528 | /* get User defaults */ |
| 529 | if (user_database != NULL) |
| 530 | XrmMergeDatabases (user_database, &rdb); |
| 531 | |
| 532 | /* Get Environment defaults. */ |
| 533 | db = get_environ_db (); |
| 534 | if (db != NULL) |
| 535 | XrmMergeDatabases (db, &rdb); |
| 536 | |
| 537 | /* Last, merge in any specification from the command line. */ |
| 538 | if (xrm_string != NULL) |
| 539 | { |
| 540 | db = XrmGetStringDatabase (xrm_string); |
| 541 | if (db != NULL) |
| 542 | XrmMergeDatabases (db, &rdb); |
| 543 | } |
| 544 | |
| 545 | return rdb; |
| 546 | } |
| 547 | |
| 548 | |
| 549 | /* Retrieve the value of the resource specified by NAME with class CLASS |
| 550 | and of type TYPE from database RDB. The value is returned in RET_VALUE. */ |
| 551 | |
| 552 | static int |
| 553 | x_get_resource (XrmDatabase rdb, const char *name, const char *class, |
| 554 | XrmRepresentation expected_type, XrmValue *ret_value) |
| 555 | { |
| 556 | XrmValue value; |
| 557 | XrmName namelist[100]; |
| 558 | XrmClass classlist[100]; |
| 559 | XrmRepresentation type; |
| 560 | |
| 561 | XrmStringToNameList (name, namelist); |
| 562 | XrmStringToClassList (class, classlist); |
| 563 | |
| 564 | if (XrmQGetResource (rdb, namelist, classlist, &type, &value) == True |
| 565 | && (type == expected_type)) |
| 566 | { |
| 567 | if (type == x_rm_string) |
| 568 | ret_value->addr = (char *) value.addr; |
| 569 | else |
| 570 | memcpy (ret_value->addr, value.addr, ret_value->size); |
| 571 | |
| 572 | return value.size; |
| 573 | } |
| 574 | |
| 575 | return 0; |
| 576 | } |
| 577 | |
| 578 | /* Retrieve the string resource specified by NAME with CLASS from |
| 579 | database RDB. */ |
| 580 | |
| 581 | char * |
| 582 | x_get_string_resource (XrmDatabase rdb, const char *name, const char *class) |
| 583 | { |
| 584 | XrmValue value; |
| 585 | |
| 586 | if (inhibit_x_resources) |
| 587 | /* --quick was passed, so this is a no-op. */ |
| 588 | return NULL; |
| 589 | |
| 590 | if (x_get_resource (rdb, name, class, x_rm_string, &value)) |
| 591 | return (char *) value.addr; |
| 592 | |
| 593 | return 0; |
| 594 | } |
| 595 | \f |
| 596 | /* Stand-alone test facilities. */ |
| 597 | |
| 598 | #ifdef TESTRM |
| 599 | |
| 600 | typedef char **List; |
| 601 | #define arg_listify(len, list) (list) |
| 602 | #define car(list) (*(list)) |
| 603 | #define cdr(list) (list + 1) |
| 604 | #define NIL(list) (! *(list)) |
| 605 | #define free_arglist(list) |
| 606 | |
| 607 | static List |
| 608 | member (char *elt, List list) |
| 609 | { |
| 610 | List p; |
| 611 | |
| 612 | for (p = list; ! NIL (p); p = cdr (p)) |
| 613 | if (! strcmp (elt, car (p))) |
| 614 | return p; |
| 615 | |
| 616 | return p; |
| 617 | } |
| 618 | |
| 619 | static void |
| 620 | fatal (char *msg, char *prog) |
| 621 | { |
| 622 | fprintf (stderr, msg, prog); |
| 623 | exit (1); |
| 624 | } |
| 625 | |
| 626 | int |
| 627 | main (int argc, char **argv) |
| 628 | { |
| 629 | Display *display; |
| 630 | char *displayname, *resource_string, *class, *name; |
| 631 | XrmDatabase xdb; |
| 632 | List arg_list, lp; |
| 633 | |
| 634 | arg_list = arg_listify (argc, argv); |
| 635 | |
| 636 | lp = member ("-d", arg_list); |
| 637 | if (!NIL (lp)) |
| 638 | displayname = car (cdr (lp)); |
| 639 | else |
| 640 | displayname = "localhost:0.0"; |
| 641 | |
| 642 | lp = member ("-xrm", arg_list); |
| 643 | resource_string = NIL (lp) ? 0 : car (cdr (lp)); |
| 644 | |
| 645 | lp = member ("-c", arg_list); |
| 646 | if (! NIL (lp)) |
| 647 | class = car (cdr (lp)); |
| 648 | else |
| 649 | class = "Emacs"; |
| 650 | |
| 651 | lp = member ("-n", arg_list); |
| 652 | if (! NIL (lp)) |
| 653 | name = car (cdr (lp)); |
| 654 | else |
| 655 | name = "emacs"; |
| 656 | |
| 657 | free_arglist (arg_list); |
| 658 | |
| 659 | if (!(display = XOpenDisplay (displayname))) |
| 660 | fatal ("Can't open display '%s'\n", XDisplayName (displayname)); |
| 661 | |
| 662 | xdb = x_load_resources (display, resource_string, name, class); |
| 663 | |
| 664 | /* In a real program, you'd want to also do this: */ |
| 665 | display->db = xdb; |
| 666 | |
| 667 | while (1) |
| 668 | { |
| 669 | char query_name[90]; |
| 670 | char query_class[90]; |
| 671 | |
| 672 | printf ("Name: "); |
| 673 | gets (query_name); |
| 674 | |
| 675 | if (strlen (query_name)) |
| 676 | { |
| 677 | char *value; |
| 678 | |
| 679 | printf ("Class: "); |
| 680 | gets (query_class); |
| 681 | |
| 682 | value = x_get_string_resource (xdb, query_name, query_class); |
| 683 | |
| 684 | if (value != NULL) |
| 685 | printf ("\t%s(%s): %s\n\n", query_name, query_class, value); |
| 686 | else |
| 687 | printf ("\tNo Value.\n\n"); |
| 688 | } |
| 689 | else |
| 690 | break; |
| 691 | } |
| 692 | printf ("\tExit.\n\n"); |
| 693 | |
| 694 | XCloseDisplay (display); |
| 695 | |
| 696 | return 0; |
| 697 | } |
| 698 | #endif /* TESTRM */ |