src/xrdb.c

   1 /* Deal with the X Resource Manager.
   2    Copyright (C) 1990, 1993, 1994, 2000, 2001, 2002, 2003, 2004,
   3                  2005, 2006, 2007, 2008 Free Software Foundation, Inc.
   4
   5 This file is part of GNU Emacs.
   6
   7 GNU Emacs is free software: you can redistribute it and/or modify
   8 it under the terms of the GNU General Public License as published by
   9 the Free Software Foundation, either version 3 of the License, or
  10 (at your option) any later version.
  11
  12 GNU Emacs is distributed in the hope that it will be useful,
  13 but WITHOUT ANY WARRANTY; without even the implied warranty of
  14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15 GNU General Public License for more details.
  16
  17 You should have received a copy of the GNU General Public License
  18 along with GNU Emacs.  If not, see <http://www.gnu.org/licenses/>.  */
  19
  20 /* Written by jla, 4/90 */
  21
  22 #ifdef emacs
  23 #include <config.h>
  24 #endif
  25
  26 #ifdef HAVE_UNISTD_H
  27 #include <unistd.h>
  28 #endif
  29
  30 #include <epaths.h>
  31
  32 #include <stdio.h>
  33
  34 #if 1 /* I'd really appreciate it if this code could go away...  -JimB */
  35 /* This avoids lossage in the `dual-universe' headers on AT&T SysV
  36    X11.  Don't do it on Solaris, because it breaks compilation with
  37    XFree86 4.0.3 (and probably many other X11R6 releases) on Solaris
  38    2 */
  39 #if defined(USG5) && !defined(SOLARIS2)
  40 #ifndef SYSV
  41 #define SYSV
  42 #endif
  43 #endif /* USG5 && !SOLARIS2 */
  44
  45 #endif /* 1 */
  46
  47 #include <X11/Xlib.h>
  48 #include <X11/Xatom.h>
  49 #if 0
  50 #include <X11/Xos.h>
  51 #endif
  52 #include <X11/X.h>
  53 #include <X11/Xutil.h>
  54 #include <X11/Xresource.h>
  55 #ifdef HAVE_PWD_H
  56 #include <pwd.h>
  57 #endif
  58 #include <sys/stat.h>
  59
  60 #if !defined(S_ISDIR) && defined(S_IFDIR)
  61 #define S_ISDIR(m) (((m) & S_IFMT) == S_IFDIR)
  62 #endif
  63
  64 #include "lisp.h"
  65
  66 extern char *getenv ();
  67
  68 /* This does cause trouble on AIX.  I'm going to take the comment at
  69    face value.  */
  70 #if 0
  71 extern short getuid ();         /* If this causes portability problems,
  72                                    I think we should just delete it; it'll
  73                                    default to `int' anyway.  */
  74 #endif
  75
  76 #ifdef DECLARE_GETPWUID_WITH_UID_T
  77 extern struct passwd *getpwuid (uid_t);
  78 extern struct passwd *getpwnam (const char *);
  79 #else
  80 extern struct passwd *getpwuid ();
  81 extern struct passwd *getpwnam ();
  82 #endif
  83
  84 extern char *get_system_name ();
  85
  86 /* Make sure not to #include anything after these definitions.  Let's
  87    not step on anyone's prototypes.  */
  88 #ifdef emacs
  89 /* darwin.h may have already defined these.  */
  90 #undef malloc
  91 #undef realloc
  92 #undef free
  93 #define malloc xmalloc
  94 #define realloc xrealloc
  95 #define free xfree
  96 #endif
  97
  98 char *x_get_string_resource ();
  99 static int file_p ();
 100
 101 \f
 102 /* X file search path processing.  */
 103
 104
 105 /* The string which gets substituted for the %C escape in XFILESEARCHPATH
 106    and friends, or zero if none was specified.  */
 107 char *x_customization_string;
 108
 109
 110 /* Return the value of the emacs.customization (Emacs.Customization)
 111    resource, for later use in search path decoding.  If we find no
 112    such resource, return zero.  */
 113 char *
 114 x_get_customization_string (db, name, class)
 115      XrmDatabase db;
 116      char *name, *class;
 117 {
 118   char *full_name
 119     = (char *) alloca (strlen (name) + sizeof ("customization") + 3);
 120   char *full_class
 121     = (char *) alloca (strlen (class) + sizeof ("Customization") + 3);
 122   char *result;
 123
 124   sprintf (full_name,  "%s.%s", name,  "customization");
 125   sprintf (full_class, "%s.%s", class, "Customization");
 126
 127   result = x_get_string_resource (db, full_name, full_class);
 128
 129   if (result)
 130     {
 131       char *copy = (char *) malloc (strlen (result) + 1);
 132       strcpy (copy, result);
 133       return copy;
 134     }
 135   else
 136     return 0;
 137 }
 138
 139
 140 /* Expand all the Xt-style %-escapes in STRING, whose length is given
 141    by STRING_LEN.  Here are the escapes we're supposed to recognize:
 142
 143         %N      The value of the application's class name
 144         %T      The value of the type parameter ("app-defaults" in this
 145                 context)
 146         %S      The value of the suffix parameter ("" in this context)
 147         %L      The language string associated with the specified display
 148                 (We use the "LANG" environment variable here, if it's set.)
 149         %l      The language part of the display's language string
 150                 (We treat this just like %L.  If someone can tell us what
 151                  we're really supposed to do, dandy.)
 152         %t      The territory part of the display's language string
 153                 (This never gets used.)
 154         %c      The codeset part of the display's language string
 155                 (This never gets used either.)
 156         %C      The customization string retrieved from the resource
 157                 database associated with display.
 158                 (This is x_customization_string.)
 159
 160    Return the expanded file name if it exists and is readable, and
 161    refers to %L only when the LANG environment variable is set, or
 162    otherwise provided by X.
 163
 164    ESCAPED_SUFFIX and SUFFIX are postpended to STRING if they are
 165    non-zero.  %-escapes in ESCAPED_SUFFIX are expanded; STRING is left
 166    alone.
 167
 168    Return NULL otherwise.  */
 169
 170 static char *
 171 magic_file_p (string, string_len, class, escaped_suffix, suffix)
 172      char *string;
 173      int string_len;
 174      char *class, *escaped_suffix, *suffix;
 175 {
 176   char *lang = getenv ("LANG");
 177
 178   int path_size = 100;
 179   char *path = (char *) malloc (path_size);
 180   int path_len = 0;
 181
 182   char *p = string;
 183
 184   while (p < string + string_len)
 185     {
 186       /* The chunk we're about to stick on the end of result.  */
 187       char *next = NULL;
 188       int next_len;
 189
 190       if (*p == '%')
 191         {
 192           p++;
 193
 194           if (p >= string + string_len)
 195             next_len = 0;
 196           else
 197             switch (*p)
 198               {
 199               case '%':
 200                 next = "%";
 201                 next_len = 1;
 202                 break;
 203
 204               case 'C':
 205                 next = (x_customization_string
 206                         ? x_customization_string
 207                         : "");
 208                 next_len = strlen (next);
 209                 break;
 210
 211               case 'N':
 212                 next = class;
 213                 next_len = strlen (class);
 214                 break;
 215
 216               case 'T':
 217                 next = "app-defaults";
 218                 next_len = strlen (next);
 219                 break;
 220
 221               default:
 222               case 'S':
 223                 next_len = 0;
 224                 break;
 225
 226               case 'L':
 227               case 'l':
 228                 if (! lang)
 229                   {
 230                     free (path);
 231                     return NULL;
 232                   }
 233
 234                 next = lang;
 235                 next_len = strlen (next);
 236                 break;
 237
 238               case 't':
 239               case 'c':
 240                 free (path);
 241                 return NULL;
 242               }
 243         }
 244       else
 245         next = p, next_len = 1;
 246
 247       /* Do we have room for this component followed by a '\0' ?  */
 248       if (path_len + next_len + 1 > path_size)
 249         {
 250           path_size = (path_len + next_len + 1) * 2;
 251           path = (char *) realloc (path, path_size);
 252         }
 253
 254       bcopy (next, path + path_len, next_len);
 255       path_len += next_len;
 256
 257       p++;
 258
 259       /* If we've reached the end of the string, append ESCAPED_SUFFIX.  */
 260       if (p >= string + string_len && escaped_suffix)
 261         {
 262           string = escaped_suffix;
 263           string_len = strlen (string);
 264           p = string;
 265           escaped_suffix = NULL;
 266         }
 267     }
 268
 269   /* Perhaps we should add the SUFFIX now.  */
 270   if (suffix)
 271     {
 272       int suffix_len = strlen (suffix);
 273
 274       if (path_len + suffix_len + 1 > path_size)
 275         {
 276           path_size = (path_len + suffix_len + 1);
 277           path = (char *) realloc (path, path_size);
 278         }
 279
 280       bcopy (suffix, path + path_len, suffix_len);
 281       path_len += suffix_len;
 282     }
 283
 284   path[path_len] = '\0';
 285
 286   if (! file_p (path))
 287     {
 288       free (path);
 289       return NULL;
 290     }
 291
 292   return path;
 293 }
 294
 295
 296 static char *
 297 gethomedir ()
 298 {
 299   struct passwd *pw;
 300   char *ptr;
 301   char *copy;
 302
 303   if ((ptr = getenv ("HOME")) == NULL)
 304     {
 305       if ((ptr = getenv ("LOGNAME")) != NULL
 306           || (ptr = getenv ("USER")) != NULL)
 307         pw = getpwnam (ptr);
 308       else
 309         pw = getpwuid (getuid ());
 310
 311       if (pw)
 312         ptr = pw->pw_dir;
 313     }
 314
 315   if (ptr == NULL)
 316     return xstrdup ("/");
 317
 318   copy = (char *) malloc (strlen (ptr) + 2);
 319   strcpy (copy, ptr);
 320   strcat (copy, "/");
 321
 322   return copy;
 323 }
 324
 325
 326 static int
 327 file_p (filename)
 328      char *filename;
 329 {
 330   struct stat status;
 331
 332   return (access (filename, 4) == 0             /* exists and is readable */
 333           && stat (filename, &status) == 0      /* get the status */
 334           && (S_ISDIR (status.st_mode)) == 0);  /* not a directory */
 335 }
 336
 337
 338 /* Find the first element of SEARCH_PATH which exists and is readable,
 339    after expanding the %-escapes.  Return 0 if we didn't find any, and
 340    the path name of the one we found otherwise.  */
 341
 342 static char *
 343 search_magic_path (search_path, class, escaped_suffix, suffix)
 344      char *search_path, *class, *escaped_suffix, *suffix;
 345 {
 346   register char *s, *p;
 347
 348   for (s = search_path; *s; s = p)
 349     {
 350       for (p = s; *p && *p != ':'; p++)
 351         ;
 352
 353       if (p > s)
 354         {
 355           char *path = magic_file_p (s, p - s, class, escaped_suffix, suffix);
 356           if (path)
 357             return path;
 358         }
 359       else if (*p == ':')
 360         {
 361           char *path;
 362
 363           s = "%N%S";
 364           path = magic_file_p (s, strlen (s), class, escaped_suffix, suffix);
 365           if (path)
 366             return path;
 367         }
 368
 369       if (*p == ':')
 370         p++;
 371     }
 372
 373   return 0;
 374 }
 375 \f
 376 /* Producing databases for individual sources.  */
 377
 378 static XrmDatabase
 379 get_system_app (class)
 380      char *class;
 381 {
 382   XrmDatabase db = NULL;
 383   char *path;
 384
 385   path = getenv ("XFILESEARCHPATH");
 386   if (! path) path = PATH_X_DEFAULTS;
 387
 388   path = search_magic_path (path, class, 0, 0);
 389   if (path)
 390     {
 391       db = XrmGetFileDatabase (path);
 392       free (path);
 393     }
 394
 395   return db;
 396 }
 397
 398
 399 static XrmDatabase
 400 get_fallback (display)
 401      Display *display;
 402 {
 403   return NULL;
 404 }
 405
 406
 407 static XrmDatabase
 408 get_user_app (class)
 409      char *class;
 410 {
 411   char *path;
 412   char *file = 0;
 413   char *free_it = 0;
 414
 415   /* Check for XUSERFILESEARCHPATH.  It is a path of complete file
 416      names, not directories.  */
 417   if (((path = getenv ("XUSERFILESEARCHPATH"))
 418        && (file = search_magic_path (path, class, 0, 0)))
 419
 420       /* Check for APPLRESDIR; it is a path of directories.  In each,
 421          we have to search for LANG/CLASS and then CLASS.  */
 422       || ((path = getenv ("XAPPLRESDIR"))
 423           && ((file = search_magic_path (path, class, "/%L/%N", 0))
 424               || (file = search_magic_path (path, class, "/%N", 0))))
 425
 426       /* Check in the home directory.  This is a bit of a hack; let's
 427          hope one's home directory doesn't contain any %-escapes.  */
 428       || (free_it = gethomedir (),
 429           ((file = search_magic_path (free_it, class, "%L/%N", 0))
 430            || (file = search_magic_path (free_it, class, "%N", 0)))))
 431     {
 432       XrmDatabase db = XrmGetFileDatabase (file);
 433       free (file);
 434       if (free_it)
 435         free (free_it);
 436       return db;
 437     }
 438
 439   if (free_it)
 440     free (free_it);
 441   return NULL;
 442 }
 443
 444
 445 static XrmDatabase
 446 get_user_db (display)
 447      Display *display;
 448 {
 449   XrmDatabase db;
 450   char *xdefs;
 451
 452 #ifdef PBaseSize                /* Cheap way to test for X11R4 or later.  */
 453   xdefs = XResourceManagerString (display);
 454 #else
 455   xdefs = display->xdefaults;
 456 #endif
 457
 458   if (xdefs != NULL)
 459     db = XrmGetStringDatabase (xdefs);
 460   else
 461     {
 462       char *home;
 463       char *xdefault;
 464
 465       home = gethomedir ();
 466       xdefault = (char *) malloc (strlen (home) + sizeof (".Xdefaults"));
 467       strcpy (xdefault, home);
 468       strcat (xdefault, ".Xdefaults");
 469       db = XrmGetFileDatabase (xdefault);
 470       free (home);
 471       free (xdefault);
 472     }
 473
 474 #ifdef HAVE_XSCREENRESOURCESTRING
 475   /* Get the screen-specific resources too.  */
 476   xdefs = XScreenResourceString (DefaultScreenOfDisplay (display));
 477   if (xdefs != NULL)
 478     {
 479       XrmMergeDatabases (XrmGetStringDatabase (xdefs), &db);
 480       XFree (xdefs);
 481     }
 482 #endif
 483
 484   return db;
 485 }
 486
 487 static XrmDatabase
 488 get_environ_db ()
 489 {
 490   XrmDatabase db;
 491   char *p;
 492   char *path = 0, *home = 0, *host;
 493
 494   if ((p = getenv ("XENVIRONMENT")) == NULL)
 495     {
 496       home = gethomedir ();
 497       host = get_system_name ();
 498       path = (char *) malloc (strlen (home)
 499                               + sizeof (".Xdefaults-")
 500                               + strlen (host));
 501       sprintf (path, "%s%s%s", home, ".Xdefaults-", host);
 502       p = path;
 503     }
 504
 505   db = XrmGetFileDatabase (p);
 506
 507   if (path) free (path);
 508   if (home) free (home);
 509
 510   return db;
 511 }
 512 \f
 513 /* External interface.  */
 514
 515 /* Types of values that we can find in a database */
 516
 517 #define XrmStringType "String"  /* String representation */
 518 XrmRepresentation x_rm_string;  /* Quark representation */
 519
 520 /* Load X resources based on the display and a possible -xrm option. */
 521
 522 XrmDatabase
 523 x_load_resources (display, xrm_string, myname, myclass)
 524      Display *display;
 525      char *xrm_string, *myname, *myclass;
 526 {
 527   XrmDatabase user_database;
 528   XrmDatabase rdb;
 529   XrmDatabase db;
 530   char line[256];
 531
 532   char *helv = "-*-helvetica-medium-r-*--*-120-*-*-*-*-iso8859-1";
 533
 534 #ifdef USE_MOTIF
 535   char *courier = "-*-courier-medium-r-*-*-*-120-*-*-*-*-iso8859-1";
 536   extern Lisp_Object Vdouble_click_time;
 537 #endif
 538
 539   x_rm_string = XrmStringToQuark (XrmStringType);
 540 #ifndef USE_X_TOOLKIT
 541   /* pmr@osf.org says this shouldn't be done if USE_X_TOOLKIT.
 542      I suspect it's because the toolkit version does this elsewhere.  */
 543   XrmInitialize ();
 544 #endif
 545   rdb = XrmGetStringDatabase ("");
 546
 547   /* Add some font defaults.  If the font `helv' doesn't exist, widgets
 548      will use some other default font.  */
 549 #ifdef USE_MOTIF
 550
 551   sprintf (line, "%s.pane.background: grey75", myclass);
 552   XrmPutLineResource (&rdb, line);
 553   sprintf (line, "%s*fontList: %s", myclass, helv);
 554   XrmPutLineResource (&rdb, line);
 555   sprintf (line, "%s*menu*background: grey75", myclass);
 556   XrmPutLineResource (&rdb, line);
 557   sprintf (line, "%s*menubar*background: grey75", myclass);
 558   XrmPutLineResource (&rdb, line);
 559   sprintf (line, "%s*verticalScrollBar.background: grey75", myclass);
 560   XrmPutLineResource (&rdb, line);
 561   sprintf (line, "%s*verticalScrollBar.troughColor: grey75", myclass);
 562   XrmPutLineResource (&rdb, line);
 563   sprintf (line, "%s.dialog*.background: grey75", myclass);
 564   XrmPutLineResource (&rdb, line);
 565   sprintf (line, "%s*fsb.Text.background: white", myclass);
 566   XrmPutLineResource (&rdb, line);
 567   sprintf (line, "%s*fsb.FilterText.background: white", myclass);
 568   XrmPutLineResource (&rdb, line);
 569   sprintf (line, "%s*fsb*DirList.background: white", myclass);
 570   XrmPutLineResource (&rdb, line);
 571   sprintf (line, "%s*fsb*ItemsList.background: white", myclass);
 572   XrmPutLineResource (&rdb, line);
 573   sprintf (line, "%s*fsb*background: grey75", myclass);
 574   XrmPutLineResource (&rdb, line);
 575   sprintf (line, "%s*fsb.Text.fontList: %s", myclass, courier);
 576   XrmPutLineResource (&rdb, line);
 577   sprintf (line, "%s*fsb.FilterText.fontList: %s", myclass, courier);
 578   XrmPutLineResource (&rdb, line);
 579   sprintf (line, "%s*fsb*ItemsList.fontList: %s", myclass, courier);
 580   XrmPutLineResource (&rdb, line);
 581   sprintf (line, "%s*fsb*DirList.fontList: %s", myclass, courier);
 582   XrmPutLineResource (&rdb, line);
 583
 584   /* Set double click time of list boxes in the file selection
 585      dialog from `double-click-time'.  */
 586   if (INTEGERP (Vdouble_click_time) && XINT (Vdouble_click_time) > 0)
 587     {
 588       sprintf (line, "%s*fsb*DirList.doubleClickInterval: %d",
 589                myclass, XFASTINT (Vdouble_click_time));
 590       XrmPutLineResource (&rdb, line);
 591       sprintf (line, "%s*fsb*ItemsList.doubleClickInterval: %d",
 592                myclass, XFASTINT (Vdouble_click_time));
 593       XrmPutLineResource (&rdb, line);
 594     }
 595
 596 #else /* not USE_MOTIF */
 597
 598   sprintf (line, "Emacs.dialog*.font: %s", helv);
 599   XrmPutLineResource (&rdb, line);
 600   sprintf (line, "Emacs.dialog*.background: grey75");
 601   XrmPutLineResource (&rdb, line);
 602   sprintf (line, "*XlwMenu*font: %s", helv);
 603   XrmPutLineResource (&rdb, line);
 604   sprintf (line, "*XlwMenu*background: grey75");
 605   XrmPutLineResource (&rdb, line);
 606   sprintf (line, "Emacs*verticalScrollBar.background: grey75");
 607   XrmPutLineResource (&rdb, line);
 608
 609 #endif /* not USE_MOTIF */
 610
 611   user_database = get_user_db (display);
 612
 613   /* Figure out what the "customization string" is, so we can use it
 614      to decode paths.  */
 615   if (x_customization_string)
 616     free (x_customization_string);
 617   x_customization_string
 618     = x_get_customization_string (user_database, myname, myclass);
 619
 620   /* Get application system defaults */
 621   db = get_system_app (myclass);
 622   if (db != NULL)
 623     XrmMergeDatabases (db, &rdb);
 624
 625   /* Get Fallback resources */
 626   db = get_fallback (display);
 627   if (db != NULL)
 628     XrmMergeDatabases (db, &rdb);
 629
 630   /* Get application user defaults */
 631   db = get_user_app (myclass);
 632   if (db != NULL)
 633     XrmMergeDatabases (db, &rdb);
 634
 635   /* get User defaults */
 636   if (user_database != NULL)
 637     XrmMergeDatabases (user_database, &rdb);
 638
 639   /* Get Environment defaults. */
 640   db = get_environ_db ();
 641   if (db != NULL)
 642     XrmMergeDatabases (db, &rdb);
 643
 644   /* Last, merge in any specification from the command line. */
 645   if (xrm_string != NULL)
 646     {
 647       db = XrmGetStringDatabase (xrm_string);
 648       if (db != NULL)
 649         XrmMergeDatabases (db, &rdb);
 650     }
 651
 652   return rdb;
 653 }
 654
 655
 656 /* Retrieve the value of the resource specified by NAME with class CLASS
 657    and of type TYPE from database RDB.  The value is returned in RET_VALUE. */
 658
 659 int
 660 x_get_resource (rdb, name, class, expected_type, ret_value)
 661      XrmDatabase rdb;
 662      char *name, *class;
 663      XrmRepresentation expected_type;
 664      XrmValue *ret_value;
 665 {
 666   XrmValue value;
 667   XrmName namelist[100];
 668   XrmClass classlist[100];
 669   XrmRepresentation type;
 670
 671   XrmStringToNameList(name, namelist);
 672   XrmStringToClassList(class, classlist);
 673
 674   if (XrmQGetResource (rdb, namelist, classlist, &type, &value) == True
 675       && (type == expected_type))
 676     {
 677       if (type == x_rm_string)
 678         ret_value->addr = (char *) value.addr;
 679       else
 680         bcopy (value.addr, ret_value->addr, ret_value->size);
 681
 682       return value.size;
 683     }
 684
 685   return 0;
 686 }
 687
 688 /* Retrieve the string resource specified by NAME with CLASS from
 689    database RDB. */
 690
 691 char *
 692 x_get_string_resource (rdb, name, class)
 693      XrmDatabase rdb;
 694      char *name, *class;
 695 {
 696   XrmValue value;
 697
 698   if (x_get_resource (rdb, name, class, x_rm_string, &value))
 699     return (char *) value.addr;
 700
 701   return (char *) 0;
 702 }
 703 \f
 704 /* Stand-alone test facilities.  */
 705
 706 #ifdef TESTRM
 707
 708 typedef char **List;
 709 #define arg_listify(len, list) (list)
 710 #define car(list) (*(list))
 711 #define cdr(list) (list + 1)
 712 #define NIL(list) (! *(list))
 713 #define free_arglist(list)
 714
 715 static List
 716 member (elt, list)
 717      char *elt;
 718      List list;
 719 {
 720   List p;
 721
 722   for (p = list; ! NIL (p); p = cdr (p))
 723     if (! strcmp (elt, car (p)))
 724       return p;
 725
 726   return p;
 727 }
 728
 729 static void
 730 fatal (msg, prog, x1, x2, x3, x4, x5)
 731     char *msg, *prog;
 732     int x1, x2, x3, x4, x5;
 733 {
 734     extern int errno;
 735
 736     if (errno)
 737       perror (prog);
 738
 739     (void) fprintf (stderr, msg, prog, x1, x2, x3, x4, x5);
 740     exit (1);
 741 }
 742
 743 main (argc, argv)
 744     int argc;
 745     char **argv;
 746 {
 747   Display *display;
 748   char *displayname, *resource_string, *class, *name;
 749   XrmDatabase xdb;
 750   List arg_list, lp;
 751
 752   arg_list = arg_listify (argc, argv);
 753
 754   lp = member ("-d", arg_list);
 755   if (!NIL (lp))
 756     displayname = car (cdr (lp));
 757   else
 758     displayname = "localhost:0.0";
 759
 760   lp = member ("-xrm", arg_list);
 761   if (! NIL (lp))
 762     resource_string = car (cdr (lp));
 763   else
 764     resource_string = (char *) 0;
 765
 766   lp = member ("-c", arg_list);
 767   if (! NIL (lp))
 768     class = car (cdr (lp));
 769   else
 770     class = "Emacs";
 771
 772   lp = member ("-n", arg_list);
 773   if (! NIL (lp))
 774     name = car (cdr (lp));
 775   else
 776     name = "emacs";
 777
 778   free_arglist (arg_list);
 779
 780   if (!(display = XOpenDisplay (displayname)))
 781     fatal ("Can't open display '%s'\n", XDisplayName (displayname));
 782
 783   xdb = x_load_resources (display, resource_string, name, class);
 784
 785   /* In a real program, you'd want to also do this: */
 786   display->db = xdb;
 787
 788   while (1)
 789     {
 790       char query_name[90];
 791       char query_class[90];
 792
 793       printf ("Name: ");
 794       gets (query_name);
 795
 796       if (strlen (query_name))
 797         {
 798           char *value;
 799
 800           printf ("Class: ");
 801           gets (query_class);
 802
 803           value = x_get_string_resource (xdb, query_name, query_class);
 804
 805           if (value != NULL)
 806             printf ("\t%s(%s):  %s\n\n", query_name, query_class, value);
 807           else
 808             printf ("\tNo Value.\n\n");
 809         }
 810       else
 811         break;
 812     }
 813   printf ("\tExit.\n\n");
 814
 815   XCloseDisplay (display);
 816 }
 817 #endif /* TESTRM */
 818
 819 /* arch-tag: 37e6fbab-ed05-4363-9e76-6c4109ed511f
 820    (do not change this comment) */