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, 2009 Free Software Foundation, 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 #ifdef emacs
  24 #include <config.h>
  25 #endif
  26
  27 #ifdef HAVE_UNISTD_H
  28 #include <unistd.h>
  29 #endif
  30
  31 #include <epaths.h>
  32
  33 #include <stdio.h>
  34
  35 #if 1 /* I'd really appreciate it if this code could go away...  -JimB */
  36 /* This avoids lossage in the `dual-universe' headers on AT&T SysV
  37    X11.  Don't do it on Solaris, because it breaks compilation with
  38    XFree86 4.0.3 (and probably many other X11R6 releases) on Solaris
  39    2 */
  40 #if defined(USG5) && !defined(SOLARIS2)
  41 #ifndef SYSV
  42 #define SYSV
  43 #endif
  44 #endif /* USG5 && !SOLARIS2 */
  45
  46 #endif /* 1 */
  47
  48 #include <X11/Xlib.h>
  49 #include <X11/Xatom.h>
  50 #if 0
  51 #include <X11/Xos.h>
  52 #endif
  53 #include <X11/X.h>
  54 #include <X11/Xutil.h>
  55 #include <X11/Xresource.h>
  56 #ifdef HAVE_PWD_H
  57 #include <pwd.h>
  58 #endif
  59 #include <sys/stat.h>
  60
  61 #if !defined(S_ISDIR) && defined(S_IFDIR)
  62 #define S_ISDIR(m) (((m) & S_IFMT) == S_IFDIR)
  63 #endif
  64
  65 #include "lisp.h"
  66
  67 extern char *getenv ();
  68
  69 /* This does cause trouble on AIX.  I'm going to take the comment at
  70    face value.  */
  71 #if 0
  72 extern short getuid ();         /* If this causes portability problems,
  73                                    I think we should just delete it; it'll
  74                                    default to `int' anyway.  */
  75 #endif
  76
  77 #ifdef DECLARE_GETPWUID_WITH_UID_T
  78 extern struct passwd *getpwuid (uid_t);
  79 extern struct passwd *getpwnam (const char *);
  80 #else
  81 extern struct passwd *getpwuid ();
  82 extern struct passwd *getpwnam ();
  83 #endif
  84
  85 extern char *get_system_name ();
  86
  87 /* Make sure not to #include anything after these definitions.  Let's
  88    not step on anyone's prototypes.  */
  89 #ifdef emacs
  90 /* darwin.h may have already defined these.  */
  91 #undef malloc
  92 #undef realloc
  93 #undef free
  94 #define malloc xmalloc
  95 #define realloc xrealloc
  96 #define free xfree
  97 #endif
  98
  99 char *x_get_string_resource ();
 100 static int file_p ();
 101
 102 \f
 103 /* X file search path processing.  */
 104
 105
 106 /* The string which gets substituted for the %C escape in XFILESEARCHPATH
 107    and friends, or zero if none was specified.  */
 108 char *x_customization_string;
 109
 110
 111 /* Return the value of the emacs.customization (Emacs.Customization)
 112    resource, for later use in search path decoding.  If we find no
 113    such resource, return zero.  */
 114 char *
 115 x_get_customization_string (db, name, class)
 116      XrmDatabase db;
 117      char *name, *class;
 118 {
 119   char *full_name
 120     = (char *) alloca (strlen (name) + sizeof ("customization") + 3);
 121   char *full_class
 122     = (char *) alloca (strlen (class) + sizeof ("Customization") + 3);
 123   char *result;
 124
 125   sprintf (full_name,  "%s.%s", name,  "customization");
 126   sprintf (full_class, "%s.%s", class, "Customization");
 127
 128   result = x_get_string_resource (db, full_name, full_class);
 129
 130   if (result)
 131     {
 132       char *copy = (char *) malloc (strlen (result) + 1);
 133       strcpy (copy, result);
 134       return copy;
 135     }
 136   else
 137     return 0;
 138 }
 139
 140
 141 /* Expand all the Xt-style %-escapes in STRING, whose length is given
 142    by STRING_LEN.  Here are the escapes we're supposed to recognize:
 143
 144         %N      The value of the application's class name
 145         %T      The value of the type parameter ("app-defaults" in this
 146                 context)
 147         %S      The value of the suffix parameter ("" in this context)
 148         %L      The language string associated with the specified display
 149                 (We use the "LANG" environment variable here, if it's set.)
 150         %l      The language part of the display's language string
 151                 (We treat this just like %L.  If someone can tell us what
 152                  we're really supposed to do, dandy.)
 153         %t      The territory part of the display's language string
 154                 (This never gets used.)
 155         %c      The codeset part of the display's language string
 156                 (This never gets used either.)
 157         %C      The customization string retrieved from the resource
 158                 database associated with display.
 159                 (This is x_customization_string.)
 160
 161    Return the expanded file name if it exists and is readable, and
 162    refers to %L only when the LANG environment variable is set, or
 163    otherwise provided by X.
 164
 165    ESCAPED_SUFFIX and SUFFIX are postpended to STRING if they are
 166    non-zero.  %-escapes in ESCAPED_SUFFIX are expanded; STRING is left
 167    alone.
 168
 169    Return NULL otherwise.  */
 170
 171 static char *
 172 magic_file_p (string, string_len, class, escaped_suffix, suffix)
 173      char *string;
 174      int string_len;
 175      char *class, *escaped_suffix, *suffix;
 176 {
 177   char *lang = getenv ("LANG");
 178
 179   int path_size = 100;
 180   char *path = (char *) malloc (path_size);
 181   int path_len = 0;
 182
 183   char *p = string;
 184
 185   while (p < string + string_len)
 186     {
 187       /* The chunk we're about to stick on the end of result.  */
 188       char *next = NULL;
 189       int next_len;
 190
 191       if (*p == '%')
 192         {
 193           p++;
 194
 195           if (p >= string + string_len)
 196             next_len = 0;
 197           else
 198             switch (*p)
 199               {
 200               case '%':
 201                 next = "%";
 202                 next_len = 1;
 203                 break;
 204
 205               case 'C':
 206                 next = (x_customization_string
 207                         ? x_customization_string
 208                         : "");
 209                 next_len = strlen (next);
 210                 break;
 211
 212               case 'N':
 213                 next = class;
 214                 next_len = strlen (class);
 215                 break;
 216
 217               case 'T':
 218                 next = "app-defaults";
 219                 next_len = strlen (next);
 220                 break;
 221
 222               default:
 223               case 'S':
 224                 next_len = 0;
 225                 break;
 226
 227               case 'L':
 228               case 'l':
 229                 if (! lang)
 230                   {
 231                     free (path);
 232                     return NULL;
 233                   }
 234
 235                 next = lang;
 236                 next_len = strlen (next);
 237                 break;
 238
 239               case 't':
 240               case 'c':
 241                 free (path);
 242                 return NULL;
 243               }
 244         }
 245       else
 246         next = p, next_len = 1;
 247
 248       /* Do we have room for this component followed by a '\0' ?  */
 249       if (path_len + next_len + 1 > path_size)
 250         {
 251           path_size = (path_len + next_len + 1) * 2;
 252           path = (char *) realloc (path, path_size);
 253         }
 254
 255       bcopy (next, path + path_len, next_len);
 256       path_len += next_len;
 257
 258       p++;
 259
 260       /* If we've reached the end of the string, append ESCAPED_SUFFIX.  */
 261       if (p >= string + string_len && escaped_suffix)
 262         {
 263           string = escaped_suffix;
 264           string_len = strlen (string);
 265           p = string;
 266           escaped_suffix = NULL;
 267         }
 268     }
 269
 270   /* Perhaps we should add the SUFFIX now.  */
 271   if (suffix)
 272     {
 273       int suffix_len = strlen (suffix);
 274
 275       if (path_len + suffix_len + 1 > path_size)
 276         {
 277           path_size = (path_len + suffix_len + 1);
 278           path = (char *) realloc (path, path_size);
 279         }
 280
 281       bcopy (suffix, path + path_len, suffix_len);
 282       path_len += suffix_len;
 283     }
 284
 285   path[path_len] = '\0';
 286
 287   if (! file_p (path))
 288     {
 289       free (path);
 290       return NULL;
 291     }
 292
 293   return path;
 294 }
 295
 296
 297 static char *
 298 gethomedir ()
 299 {
 300   struct passwd *pw;
 301   char *ptr;
 302   char *copy;
 303
 304   if ((ptr = getenv ("HOME")) == NULL)
 305     {
 306       if ((ptr = getenv ("LOGNAME")) != NULL
 307           || (ptr = getenv ("USER")) != NULL)
 308         pw = getpwnam (ptr);
 309       else
 310         pw = getpwuid (getuid ());
 311
 312       if (pw)
 313         ptr = pw->pw_dir;
 314     }
 315
 316   if (ptr == NULL)
 317     return xstrdup ("/");
 318
 319   copy = (char *) malloc (strlen (ptr) + 2);
 320   strcpy (copy, ptr);
 321   strcat (copy, "/");
 322
 323   return copy;
 324 }
 325
 326
 327 static int
 328 file_p (filename)
 329      char *filename;
 330 {
 331   struct stat status;
 332
 333   return (access (filename, 4) == 0             /* exists and is readable */
 334           && stat (filename, &status) == 0      /* get the status */
 335           && (S_ISDIR (status.st_mode)) == 0);  /* not a directory */
 336 }
 337
 338
 339 /* Find the first element of SEARCH_PATH which exists and is readable,
 340    after expanding the %-escapes.  Return 0 if we didn't find any, and
 341    the path name of the one we found otherwise.  */
 342
 343 static char *
 344 search_magic_path (search_path, class, escaped_suffix, suffix)
 345      char *search_path, *class, *escaped_suffix, *suffix;
 346 {
 347   register char *s, *p;
 348
 349   for (s = search_path; *s; s = p)
 350     {
 351       for (p = s; *p && *p != ':'; p++)
 352         ;
 353
 354       if (p > s)
 355         {
 356           char *path = magic_file_p (s, p - s, class, escaped_suffix, suffix);
 357           if (path)
 358             return path;
 359         }
 360       else if (*p == ':')
 361         {
 362           char *path;
 363
 364           s = "%N%S";
 365           path = magic_file_p (s, strlen (s), class, escaped_suffix, suffix);
 366           if (path)
 367             return path;
 368         }
 369
 370       if (*p == ':')
 371         p++;
 372     }
 373
 374   return 0;
 375 }
 376 \f
 377 /* Producing databases for individual sources.  */
 378
 379 static XrmDatabase
 380 get_system_app (class)
 381      char *class;
 382 {
 383   XrmDatabase db = NULL;
 384   char *path;
 385
 386   path = getenv ("XFILESEARCHPATH");
 387   if (! path) path = PATH_X_DEFAULTS;
 388
 389   path = search_magic_path (path, class, 0, 0);
 390   if (path)
 391     {
 392       db = XrmGetFileDatabase (path);
 393       free (path);
 394     }
 395
 396   return db;
 397 }
 398
 399
 400 static XrmDatabase
 401 get_fallback (display)
 402      Display *display;
 403 {
 404   return NULL;
 405 }
 406
 407
 408 static XrmDatabase
 409 get_user_app (class)
 410      char *class;
 411 {
 412   char *path;
 413   char *file = 0;
 414   char *free_it = 0;
 415
 416   /* Check for XUSERFILESEARCHPATH.  It is a path of complete file
 417      names, not directories.  */
 418   if (((path = getenv ("XUSERFILESEARCHPATH"))
 419        && (file = search_magic_path (path, class, 0, 0)))
 420
 421       /* Check for APPLRESDIR; it is a path of directories.  In each,
 422          we have to search for LANG/CLASS and then CLASS.  */
 423       || ((path = getenv ("XAPPLRESDIR"))
 424           && ((file = search_magic_path (path, class, "/%L/%N", 0))
 425               || (file = search_magic_path (path, class, "/%N", 0))))
 426
 427       /* Check in the home directory.  This is a bit of a hack; let's
 428          hope one's home directory doesn't contain any %-escapes.  */
 429       || (free_it = gethomedir (),
 430           ((file = search_magic_path (free_it, class, "%L/%N", 0))
 431            || (file = search_magic_path (free_it, class, "%N", 0)))))
 432     {
 433       XrmDatabase db = XrmGetFileDatabase (file);
 434       free (file);
 435       free (free_it);
 436       return db;
 437     }
 438
 439   free (free_it);
 440   return NULL;
 441 }
 442
 443
 444 static XrmDatabase
 445 get_user_db (display)
 446      Display *display;
 447 {
 448   XrmDatabase db;
 449   char *xdefs;
 450
 451 #ifdef PBaseSize                /* Cheap way to test for X11R4 or later.  */
 452   xdefs = XResourceManagerString (display);
 453 #else
 454   xdefs = display->xdefaults;
 455 #endif
 456
 457   if (xdefs != NULL)
 458     db = XrmGetStringDatabase (xdefs);
 459   else
 460     {
 461       char *home;
 462       char *xdefault;
 463
 464       home = gethomedir ();
 465       xdefault = (char *) malloc (strlen (home) + sizeof (".Xdefaults"));
 466       strcpy (xdefault, home);
 467       strcat (xdefault, ".Xdefaults");
 468       db = XrmGetFileDatabase (xdefault);
 469       free (home);
 470       free (xdefault);
 471     }
 472
 473 #ifdef HAVE_XSCREENRESOURCESTRING
 474   /* Get the screen-specific resources too.  */
 475   xdefs = XScreenResourceString (DefaultScreenOfDisplay (display));
 476   if (xdefs != NULL)
 477     {
 478       XrmMergeDatabases (XrmGetStringDatabase (xdefs), &db);
 479       XFree (xdefs);
 480     }
 481 #endif
 482
 483   return db;
 484 }
 485
 486 static XrmDatabase
 487 get_environ_db ()
 488 {
 489   XrmDatabase db;
 490   char *p;
 491   char *path = 0, *home = 0, *host;
 492
 493   if ((p = getenv ("XENVIRONMENT")) == NULL)
 494     {
 495       home = gethomedir ();
 496       host = get_system_name ();
 497       path = (char *) malloc (strlen (home)
 498                               + sizeof (".Xdefaults-")
 499                               + strlen (host));
 500       sprintf (path, "%s%s%s", home, ".Xdefaults-", host);
 501       p = path;
 502     }
 503
 504   db = XrmGetFileDatabase (p);
 505
 506   free (path);
 507   free (home);
 508
 509   return db;
 510 }
 511 \f
 512 /* External interface.  */
 513
 514 /* Types of values that we can find in a database */
 515
 516 #define XrmStringType "String"  /* String representation */
 517 XrmRepresentation x_rm_string;  /* Quark representation */
 518
 519 /* Load X resources based on the display and a possible -xrm option. */
 520
 521 XrmDatabase
 522 x_load_resources (display, xrm_string, myname, myclass)
 523      Display *display;
 524      char *xrm_string, *myname, *myclass;
 525 {
 526   XrmDatabase user_database;
 527   XrmDatabase rdb;
 528   XrmDatabase db;
 529   char line[256];
 530
 531   char *helv = "-*-helvetica-medium-r-*--*-120-*-*-*-*-iso8859-1";
 532
 533 #ifdef USE_MOTIF
 534   char *courier = "-*-courier-medium-r-*-*-*-120-*-*-*-*-iso8859-1";
 535   extern Lisp_Object Vdouble_click_time;
 536 #endif
 537
 538   x_rm_string = XrmStringToQuark (XrmStringType);
 539 #ifndef USE_X_TOOLKIT
 540   /* pmr@osf.org says this shouldn't be done if USE_X_TOOLKIT.
 541      I suspect it's because the toolkit version does this elsewhere.  */
 542   XrmInitialize ();
 543 #endif
 544   rdb = XrmGetStringDatabase ("");
 545
 546   /* Add some font defaults.  If the font `helv' doesn't exist, widgets
 547      will use some other default font.  */
 548 #ifdef USE_MOTIF
 549
 550   sprintf (line, "%s.pane.background: grey75", myclass);
 551   XrmPutLineResource (&rdb, line);
 552   sprintf (line, "%s*fontList: %s", myclass, helv);
 553   XrmPutLineResource (&rdb, line);
 554   sprintf (line, "%s*menu*background: grey75", myclass);
 555   XrmPutLineResource (&rdb, line);
 556   sprintf (line, "%s*menubar*background: grey75", myclass);
 557   XrmPutLineResource (&rdb, line);
 558   sprintf (line, "%s*verticalScrollBar.background: grey75", myclass);
 559   XrmPutLineResource (&rdb, line);
 560   sprintf (line, "%s*verticalScrollBar.troughColor: grey75", myclass);
 561   XrmPutLineResource (&rdb, line);
 562   sprintf (line, "%s.dialog*.background: grey75", myclass);
 563   XrmPutLineResource (&rdb, line);
 564   sprintf (line, "%s*fsb.Text.background: white", myclass);
 565   XrmPutLineResource (&rdb, line);
 566   sprintf (line, "%s*fsb.FilterText.background: white", myclass);
 567   XrmPutLineResource (&rdb, line);
 568   sprintf (line, "%s*fsb*DirList.background: white", myclass);
 569   XrmPutLineResource (&rdb, line);
 570   sprintf (line, "%s*fsb*ItemsList.background: white", myclass);
 571   XrmPutLineResource (&rdb, line);
 572   sprintf (line, "%s*fsb*background: grey75", myclass);
 573   XrmPutLineResource (&rdb, line);
 574   sprintf (line, "%s*fsb.Text.fontList: %s", myclass, courier);
 575   XrmPutLineResource (&rdb, line);
 576   sprintf (line, "%s*fsb.FilterText.fontList: %s", myclass, courier);
 577   XrmPutLineResource (&rdb, line);
 578   sprintf (line, "%s*fsb*ItemsList.fontList: %s", myclass, courier);
 579   XrmPutLineResource (&rdb, line);
 580   sprintf (line, "%s*fsb*DirList.fontList: %s", myclass, courier);
 581   XrmPutLineResource (&rdb, line);
 582
 583   /* Set double click time of list boxes in the file selection
 584      dialog from `double-click-time'.  */
 585   if (INTEGERP (Vdouble_click_time) && XINT (Vdouble_click_time) > 0)
 586     {
 587       sprintf (line, "%s*fsb*DirList.doubleClickInterval: %d",
 588                myclass, XFASTINT (Vdouble_click_time));
 589       XrmPutLineResource (&rdb, line);
 590       sprintf (line, "%s*fsb*ItemsList.doubleClickInterval: %d",
 591                myclass, XFASTINT (Vdouble_click_time));
 592       XrmPutLineResource (&rdb, line);
 593     }
 594
 595 #else /* not USE_MOTIF */
 596
 597   sprintf (line, "Emacs.dialog*.font: %s", helv);
 598   XrmPutLineResource (&rdb, line);
 599   sprintf (line, "Emacs.dialog*.background: grey75");
 600   XrmPutLineResource (&rdb, line);
 601   sprintf (line, "*XlwMenu*font: %s", helv);
 602   XrmPutLineResource (&rdb, line);
 603   sprintf (line, "*XlwMenu*background: grey75");
 604   XrmPutLineResource (&rdb, line);
 605   sprintf (line, "Emacs*verticalScrollBar.background: grey75");
 606   XrmPutLineResource (&rdb, line);
 607
 608 #endif /* not USE_MOTIF */
 609
 610   user_database = get_user_db (display);
 611
 612   /* Figure out what the "customization string" is, so we can use it
 613      to decode paths.  */
 614   free (x_customization_string);
 615   x_customization_string
 616     = x_get_customization_string (user_database, myname, myclass);
 617
 618   /* Get application system defaults */
 619   db = get_system_app (myclass);
 620   if (db != NULL)
 621     XrmMergeDatabases (db, &rdb);
 622
 623   /* Get Fallback resources */
 624   db = get_fallback (display);
 625   if (db != NULL)
 626     XrmMergeDatabases (db, &rdb);
 627
 628   /* Get application user defaults */
 629   db = get_user_app (myclass);
 630   if (db != NULL)
 631     XrmMergeDatabases (db, &rdb);
 632
 633   /* get User defaults */
 634   if (user_database != NULL)
 635     XrmMergeDatabases (user_database, &rdb);
 636
 637   /* Get Environment defaults. */
 638   db = get_environ_db ();
 639   if (db != NULL)
 640     XrmMergeDatabases (db, &rdb);
 641
 642   /* Last, merge in any specification from the command line. */
 643   if (xrm_string != NULL)
 644     {
 645       db = XrmGetStringDatabase (xrm_string);
 646       if (db != NULL)
 647         XrmMergeDatabases (db, &rdb);
 648     }
 649
 650   return rdb;
 651 }
 652
 653
 654 /* Retrieve the value of the resource specified by NAME with class CLASS
 655    and of type TYPE from database RDB.  The value is returned in RET_VALUE. */
 656
 657 int
 658 x_get_resource (rdb, name, class, expected_type, ret_value)
 659      XrmDatabase rdb;
 660      char *name, *class;
 661      XrmRepresentation expected_type;
 662      XrmValue *ret_value;
 663 {
 664   XrmValue value;
 665   XrmName namelist[100];
 666   XrmClass classlist[100];
 667   XrmRepresentation type;
 668
 669   XrmStringToNameList(name, namelist);
 670   XrmStringToClassList(class, classlist);
 671
 672   if (XrmQGetResource (rdb, namelist, classlist, &type, &value) == True
 673       && (type == expected_type))
 674     {
 675       if (type == x_rm_string)
 676         ret_value->addr = (char *) value.addr;
 677       else
 678         bcopy (value.addr, ret_value->addr, ret_value->size);
 679
 680       return value.size;
 681     }
 682
 683   return 0;
 684 }
 685
 686 /* Retrieve the string resource specified by NAME with CLASS from
 687    database RDB. */
 688
 689 char *
 690 x_get_string_resource (rdb, name, class)
 691      XrmDatabase rdb;
 692      char *name, *class;
 693 {
 694   XrmValue value;
 695
 696   if (x_get_resource (rdb, name, class, x_rm_string, &value))
 697     return (char *) value.addr;
 698
 699   return (char *) 0;
 700 }
 701 \f
 702 /* Stand-alone test facilities.  */
 703
 704 #ifdef TESTRM
 705
 706 typedef char **List;
 707 #define arg_listify(len, list) (list)
 708 #define car(list) (*(list))
 709 #define cdr(list) (list + 1)
 710 #define NIL(list) (! *(list))
 711 #define free_arglist(list)
 712
 713 static List
 714 member (elt, list)
 715      char *elt;
 716      List list;
 717 {
 718   List p;
 719
 720   for (p = list; ! NIL (p); p = cdr (p))
 721     if (! strcmp (elt, car (p)))
 722       return p;
 723
 724   return p;
 725 }
 726
 727 static void
 728 fatal (msg, prog, x1, x2, x3, x4, x5)
 729     char *msg, *prog;
 730     int x1, x2, x3, x4, x5;
 731 {
 732     extern int errno;
 733
 734     if (errno)
 735       perror (prog);
 736
 737     (void) fprintf (stderr, msg, prog, x1, x2, x3, x4, x5);
 738     exit (1);
 739 }
 740
 741 main (argc, argv)
 742     int argc;
 743     char **argv;
 744 {
 745   Display *display;
 746   char *displayname, *resource_string, *class, *name;
 747   XrmDatabase xdb;
 748   List arg_list, lp;
 749
 750   arg_list = arg_listify (argc, argv);
 751
 752   lp = member ("-d", arg_list);
 753   if (!NIL (lp))
 754     displayname = car (cdr (lp));
 755   else
 756     displayname = "localhost:0.0";
 757
 758   lp = member ("-xrm", arg_list);
 759   if (! NIL (lp))
 760     resource_string = car (cdr (lp));
 761   else
 762     resource_string = (char *) 0;
 763
 764   lp = member ("-c", arg_list);
 765   if (! NIL (lp))
 766     class = car (cdr (lp));
 767   else
 768     class = "Emacs";
 769
 770   lp = member ("-n", arg_list);
 771   if (! NIL (lp))
 772     name = car (cdr (lp));
 773   else
 774     name = "emacs";
 775
 776   free_arglist (arg_list);
 777
 778   if (!(display = XOpenDisplay (displayname)))
 779     fatal ("Can't open display '%s'\n", XDisplayName (displayname));
 780
 781   xdb = x_load_resources (display, resource_string, name, class);
 782
 783   /* In a real program, you'd want to also do this: */
 784   display->db = xdb;
 785
 786   while (1)
 787     {
 788       char query_name[90];
 789       char query_class[90];
 790
 791       printf ("Name: ");
 792       gets (query_name);
 793
 794       if (strlen (query_name))
 795         {
 796           char *value;
 797
 798           printf ("Class: ");
 799           gets (query_class);
 800
 801           value = x_get_string_resource (xdb, query_name, query_class);
 802
 803           if (value != NULL)
 804             printf ("\t%s(%s):  %s\n\n", query_name, query_class, value);
 805           else
 806             printf ("\tNo Value.\n\n");
 807         }
 808       else
 809         break;
 810     }
 811   printf ("\tExit.\n\n");
 812
 813   XCloseDisplay (display);
 814 }
 815 #endif /* TESTRM */
 816
 817 /* arch-tag: 37e6fbab-ed05-4363-9e76-6c4109ed511f
 818    (do not change this comment) */