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, 2010 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 <errno.h>
  32 #include <epaths.h>
  33
  34 #include <stdio.h>
  35 #include <setjmp.h>
  36
  37 #if 1 /* I'd really appreciate it if this code could go away...  -JimB */
  38 /* This avoids lossage in the `dual-universe' headers on AT&T SysV
  39    X11.  Don't do it on Solaris, because it breaks compilation with
  40    XFree86 4.0.3 (and probably many other X11R6 releases) on Solaris
  41    2 */
  42 #if defined(USG5) && !defined(SOLARIS2)
  43 #ifndef SYSV
  44 #define SYSV
  45 #endif
  46 #endif /* USG5 && !SOLARIS2 */
  47
  48 #endif /* 1 */
  49
  50 #include <X11/Xlib.h>
  51 #include <X11/Xatom.h>
  52 #if 0
  53 #include <X11/Xos.h>
  54 #endif
  55 #include <X11/X.h>
  56 #include <X11/Xutil.h>
  57 #include <X11/Xresource.h>
  58 #ifdef HAVE_PWD_H
  59 #include <pwd.h>
  60 #endif
  61 #include <sys/stat.h>
  62
  63 #if !defined(S_ISDIR) && defined(S_IFDIR)
  64 #define S_ISDIR(m) (((m) & S_IFMT) == S_IFDIR)
  65 #endif
  66
  67 #include "lisp.h"
  68
  69 extern char *getenv ();
  70
  71 /* This does cause trouble on AIX.  I'm going to take the comment at
  72    face value.  */
  73 #if 0
  74 extern short getuid ();         /* If this causes portability problems,
  75                                    I think we should just delete it; it'll
  76                                    default to `int' anyway.  */
  77 #endif
  78
  79 #ifdef DECLARE_GETPWUID_WITH_UID_T
  80 extern struct passwd *getpwuid (uid_t);
  81 extern struct passwd *getpwnam (const char *);
  82 #else
  83 extern struct passwd *getpwuid ();
  84 extern struct passwd *getpwnam ();
  85 #endif
  86
  87 extern char *get_system_name ();
  88
  89 /* Make sure not to #include anything after these definitions.  Let's
  90    not step on anyone's prototypes.  */
  91 #ifdef emacs
  92 /* darwin.h may have already defined these.  */
  93 #undef malloc
  94 #undef realloc
  95 #undef free
  96 #define malloc xmalloc
  97 #define realloc xrealloc
  98 #define free xfree
  99 #endif
 100
 101 char *x_get_string_resource ();
 102 static int file_p ();
 103
 104 \f
 105 /* X file search path processing.  */
 106
 107
 108 /* The string which gets substituted for the %C escape in XFILESEARCHPATH
 109    and friends, or zero if none was specified.  */
 110 char *x_customization_string;
 111
 112
 113 /* Return the value of the emacs.customization (Emacs.Customization)
 114    resource, for later use in search path decoding.  If we find no
 115    such resource, return zero.  */
 116 char *
 117 x_get_customization_string (db, name, class)
 118      XrmDatabase db;
 119      char *name, *class;
 120 {
 121   char *full_name
 122     = (char *) alloca (strlen (name) + sizeof ("customization") + 3);
 123   char *full_class
 124     = (char *) alloca (strlen (class) + sizeof ("Customization") + 3);
 125   char *result;
 126
 127   sprintf (full_name,  "%s.%s", name,  "customization");
 128   sprintf (full_class, "%s.%s", class, "Customization");
 129
 130   result = x_get_string_resource (db, full_name, full_class);
 131
 132   if (result)
 133     {
 134       char *copy = (char *) malloc (strlen (result) + 1);
 135       strcpy (copy, result);
 136       return copy;
 137     }
 138   else
 139     return 0;
 140 }
 141
 142
 143 /* Expand all the Xt-style %-escapes in STRING, whose length is given
 144    by STRING_LEN.  Here are the escapes we're supposed to recognize:
 145
 146         %N      The value of the application's class name
 147         %T      The value of the type parameter ("app-defaults" in this
 148                 context)
 149         %S      The value of the suffix parameter ("" in this context)
 150         %L      The language string associated with the specified display
 151                 (We use the "LANG" environment variable here, if it's set.)
 152         %l      The language part of the display's language string
 153                 (We treat this just like %L.  If someone can tell us what
 154                  we're really supposed to do, dandy.)
 155         %t      The territory part of the display's language string
 156                 (This never gets used.)
 157         %c      The codeset part of the display's language string
 158                 (This never gets used either.)
 159         %C      The customization string retrieved from the resource
 160                 database associated with display.
 161                 (This is x_customization_string.)
 162
 163    Return the expanded file name if it exists and is readable, and
 164    refers to %L only when the LANG environment variable is set, or
 165    otherwise provided by X.
 166
 167    ESCAPED_SUFFIX and SUFFIX are postpended to STRING if they are
 168    non-zero.  %-escapes in ESCAPED_SUFFIX are expanded; STRING is left
 169    alone.
 170
 171    Return NULL otherwise.  */
 172
 173 static char *
 174 magic_file_p (string, string_len, class, escaped_suffix, suffix)
 175      char *string;
 176      int string_len;
 177      char *class, *escaped_suffix, *suffix;
 178 {
 179   char *lang = getenv ("LANG");
 180
 181   int path_size = 100;
 182   char *path = (char *) malloc (path_size);
 183   int path_len = 0;
 184
 185   char *p = string;
 186
 187   while (p < string + string_len)
 188     {
 189       /* The chunk we're about to stick on the end of result.  */
 190       char *next = NULL;
 191       int next_len;
 192
 193       if (*p == '%')
 194         {
 195           p++;
 196
 197           if (p >= string + string_len)
 198             next_len = 0;
 199           else
 200             switch (*p)
 201               {
 202               case '%':
 203                 next = "%";
 204                 next_len = 1;
 205                 break;
 206
 207               case 'C':
 208                 next = (x_customization_string
 209                         ? x_customization_string
 210                         : "");
 211                 next_len = strlen (next);
 212                 break;
 213
 214               case 'N':
 215                 next = class;
 216                 next_len = strlen (class);
 217                 break;
 218
 219               case 'T':
 220                 next = "app-defaults";
 221                 next_len = strlen (next);
 222                 break;
 223
 224               default:
 225               case 'S':
 226                 next_len = 0;
 227                 break;
 228
 229               case 'L':
 230               case 'l':
 231                 if (! lang)
 232                   {
 233                     free (path);
 234                     return NULL;
 235                   }
 236
 237                 next = lang;
 238                 next_len = strlen (next);
 239                 break;
 240
 241               case 't':
 242               case 'c':
 243                 free (path);
 244                 return NULL;
 245               }
 246         }
 247       else
 248         next = p, next_len = 1;
 249
 250       /* Do we have room for this component followed by a '\0' ?  */
 251       if (path_len + next_len + 1 > path_size)
 252         {
 253           path_size = (path_len + next_len + 1) * 2;
 254           path = (char *) realloc (path, path_size);
 255         }
 256
 257       bcopy (next, path + path_len, next_len);
 258       path_len += next_len;
 259
 260       p++;
 261
 262       /* If we've reached the end of the string, append ESCAPED_SUFFIX.  */
 263       if (p >= string + string_len && escaped_suffix)
 264         {
 265           string = escaped_suffix;
 266           string_len = strlen (string);
 267           p = string;
 268           escaped_suffix = NULL;
 269         }
 270     }
 271
 272   /* Perhaps we should add the SUFFIX now.  */
 273   if (suffix)
 274     {
 275       int suffix_len = strlen (suffix);
 276
 277       if (path_len + suffix_len + 1 > path_size)
 278         {
 279           path_size = (path_len + suffix_len + 1);
 280           path = (char *) realloc (path, path_size);
 281         }
 282
 283       bcopy (suffix, path + path_len, suffix_len);
 284       path_len += suffix_len;
 285     }
 286
 287   path[path_len] = '\0';
 288
 289   if (! file_p (path))
 290     {
 291       free (path);
 292       return NULL;
 293     }
 294
 295   return path;
 296 }
 297
 298
 299 static char *
 300 gethomedir ()
 301 {
 302   struct passwd *pw;
 303   char *ptr;
 304   char *copy;
 305
 306   if ((ptr = getenv ("HOME")) == NULL)
 307     {
 308       if ((ptr = getenv ("LOGNAME")) != NULL
 309           || (ptr = getenv ("USER")) != NULL)
 310         pw = getpwnam (ptr);
 311       else
 312         pw = getpwuid (getuid ());
 313
 314       if (pw)
 315         ptr = pw->pw_dir;
 316     }
 317
 318   if (ptr == NULL)
 319     return xstrdup ("/");
 320
 321   copy = (char *) malloc (strlen (ptr) + 2);
 322   strcpy (copy, ptr);
 323   strcat (copy, "/");
 324
 325   return copy;
 326 }
 327
 328
 329 static int
 330 file_p (filename)
 331      char *filename;
 332 {
 333   struct stat status;
 334
 335   return (access (filename, 4) == 0             /* exists and is readable */
 336           && stat (filename, &status) == 0      /* get the status */
 337           && (S_ISDIR (status.st_mode)) == 0);  /* not a directory */
 338 }
 339
 340
 341 /* Find the first element of SEARCH_PATH which exists and is readable,
 342    after expanding the %-escapes.  Return 0 if we didn't find any, and
 343    the path name of the one we found otherwise.  */
 344
 345 static char *
 346 search_magic_path (search_path, class, escaped_suffix, suffix)
 347      char *search_path, *class, *escaped_suffix, *suffix;
 348 {
 349   register char *s, *p;
 350
 351   for (s = search_path; *s; s = p)
 352     {
 353       for (p = s; *p && *p != ':'; p++)
 354         ;
 355
 356       if (p > s)
 357         {
 358           char *path = magic_file_p (s, p - s, class, escaped_suffix, suffix);
 359           if (path)
 360             return path;
 361         }
 362       else if (*p == ':')
 363         {
 364           char *path;
 365
 366           s = "%N%S";
 367           path = magic_file_p (s, strlen (s), class, escaped_suffix, suffix);
 368           if (path)
 369             return path;
 370         }
 371
 372       if (*p == ':')
 373         p++;
 374     }
 375
 376   return 0;
 377 }
 378 \f
 379 /* Producing databases for individual sources.  */
 380
 381 static XrmDatabase
 382 get_system_app (class)
 383      char *class;
 384 {
 385   XrmDatabase db = NULL;
 386   char *path;
 387
 388   path = getenv ("XFILESEARCHPATH");
 389   if (! path) path = PATH_X_DEFAULTS;
 390
 391   path = search_magic_path (path, class, 0, 0);
 392   if (path)
 393     {
 394       db = XrmGetFileDatabase (path);
 395       free (path);
 396     }
 397
 398   return db;
 399 }
 400
 401
 402 static XrmDatabase
 403 get_fallback (display)
 404      Display *display;
 405 {
 406   return NULL;
 407 }
 408
 409
 410 static XrmDatabase
 411 get_user_app (class)
 412      char *class;
 413 {
 414   char *path;
 415   char *file = 0;
 416   char *free_it = 0;
 417
 418   /* Check for XUSERFILESEARCHPATH.  It is a path of complete file
 419      names, not directories.  */
 420   if (((path = getenv ("XUSERFILESEARCHPATH"))
 421        && (file = search_magic_path (path, class, 0, 0)))
 422
 423       /* Check for APPLRESDIR; it is a path of directories.  In each,
 424          we have to search for LANG/CLASS and then CLASS.  */
 425       || ((path = getenv ("XAPPLRESDIR"))
 426           && ((file = search_magic_path (path, class, "/%L/%N", 0))
 427               || (file = search_magic_path (path, class, "/%N", 0))))
 428
 429       /* Check in the home directory.  This is a bit of a hack; let's
 430          hope one's home directory doesn't contain any %-escapes.  */
 431       || (free_it = gethomedir (),
 432           ((file = search_magic_path (free_it, class, "%L/%N", 0))
 433            || (file = search_magic_path (free_it, class, "%N", 0)))))
 434     {
 435       XrmDatabase db = XrmGetFileDatabase (file);
 436       free (file);
 437       free (free_it);
 438       return db;
 439     }
 440
 441   free (free_it);
 442   return NULL;
 443 }
 444
 445
 446 static XrmDatabase
 447 get_user_db (display)
 448      Display *display;
 449 {
 450   XrmDatabase db;
 451   char *xdefs;
 452
 453 #ifdef PBaseSize                /* Cheap way to test for X11R4 or later.  */
 454   xdefs = XResourceManagerString (display);
 455 #else
 456   xdefs = display->xdefaults;
 457 #endif
 458
 459   if (xdefs != NULL)
 460     db = XrmGetStringDatabase (xdefs);
 461   else
 462     {
 463       char *home;
 464       char *xdefault;
 465
 466       home = gethomedir ();
 467       xdefault = (char *) malloc (strlen (home) + sizeof (".Xdefaults"));
 468       strcpy (xdefault, home);
 469       strcat (xdefault, ".Xdefaults");
 470       db = XrmGetFileDatabase (xdefault);
 471       free (home);
 472       free (xdefault);
 473     }
 474
 475 #ifdef HAVE_XSCREENRESOURCESTRING
 476   /* Get the screen-specific resources too.  */
 477   xdefs = XScreenResourceString (DefaultScreenOfDisplay (display));
 478   if (xdefs != NULL)
 479     {
 480       XrmMergeDatabases (XrmGetStringDatabase (xdefs), &db);
 481       XFree (xdefs);
 482     }
 483 #endif
 484
 485   return db;
 486 }
 487
 488 static XrmDatabase
 489 get_environ_db ()
 490 {
 491   XrmDatabase db;
 492   char *p;
 493   char *path = 0, *home = 0, *host;
 494
 495   if ((p = getenv ("XENVIRONMENT")) == NULL)
 496     {
 497       home = gethomedir ();
 498       host = get_system_name ();
 499       path = (char *) malloc (strlen (home)
 500                               + sizeof (".Xdefaults-")
 501                               + strlen (host));
 502       sprintf (path, "%s%s%s", home, ".Xdefaults-", host);
 503       p = path;
 504     }
 505
 506   db = XrmGetFileDatabase (p);
 507
 508   free (path);
 509   free (home);
 510
 511   return db;
 512 }
 513 \f
 514 /* External interface.  */
 515
 516 /* Types of values that we can find in a database */
 517
 518 #define XrmStringType "String"  /* String representation */
 519 XrmRepresentation x_rm_string;  /* Quark representation */
 520
 521 /* Load X resources based on the display and a possible -xrm option. */
 522
 523 XrmDatabase
 524 x_load_resources (display, xrm_string, myname, myclass)
 525      Display *display;
 526      char *xrm_string, *myname, *myclass;
 527 {
 528   XrmDatabase user_database;
 529   XrmDatabase rdb;
 530   XrmDatabase db;
 531   char line[256];
 532
 533   char *helv = "-*-helvetica-medium-r-*--*-120-*-*-*-*-iso8859-1";
 534
 535 #ifdef USE_MOTIF
 536   char *courier = "-*-courier-medium-r-*-*-*-120-*-*-*-*-iso8859-1";
 537   extern Lisp_Object Vdouble_click_time;
 538 #endif
 539
 540   x_rm_string = XrmStringToQuark (XrmStringType);
 541 #ifndef USE_X_TOOLKIT
 542   /* pmr@osf.org says this shouldn't be done if USE_X_TOOLKIT.
 543      I suspect it's because the toolkit version does this elsewhere.  */
 544   XrmInitialize ();
 545 #endif
 546   rdb = XrmGetStringDatabase ("");
 547
 548   /* Add some font defaults.  If the font `helv' doesn't exist, widgets
 549      will use some other default font.  */
 550 #ifdef USE_MOTIF
 551
 552   sprintf (line, "%s.pane.background: grey75", myclass);
 553   XrmPutLineResource (&rdb, line);
 554   sprintf (line, "%s*fontList: %s", myclass, helv);
 555   XrmPutLineResource (&rdb, line);
 556   sprintf (line, "%s*menu*background: grey75", myclass);
 557   XrmPutLineResource (&rdb, line);
 558   sprintf (line, "%s*menubar*background: grey75", myclass);
 559   XrmPutLineResource (&rdb, line);
 560   sprintf (line, "%s*verticalScrollBar.background: grey75", myclass);
 561   XrmPutLineResource (&rdb, line);
 562   sprintf (line, "%s*verticalScrollBar.troughColor: grey75", myclass);
 563   XrmPutLineResource (&rdb, line);
 564   sprintf (line, "%s.dialog*.background: grey75", myclass);
 565   XrmPutLineResource (&rdb, line);
 566   sprintf (line, "%s*fsb.Text.background: white", myclass);
 567   XrmPutLineResource (&rdb, line);
 568   sprintf (line, "%s*fsb.FilterText.background: white", myclass);
 569   XrmPutLineResource (&rdb, line);
 570   sprintf (line, "%s*fsb*DirList.background: white", myclass);
 571   XrmPutLineResource (&rdb, line);
 572   sprintf (line, "%s*fsb*ItemsList.background: white", myclass);
 573   XrmPutLineResource (&rdb, line);
 574   sprintf (line, "%s*fsb*background: grey75", myclass);
 575   XrmPutLineResource (&rdb, line);
 576   sprintf (line, "%s*fsb.Text.fontList: %s", myclass, courier);
 577   XrmPutLineResource (&rdb, line);
 578   sprintf (line, "%s*fsb.FilterText.fontList: %s", myclass, courier);
 579   XrmPutLineResource (&rdb, line);
 580   sprintf (line, "%s*fsb*ItemsList.fontList: %s", myclass, courier);
 581   XrmPutLineResource (&rdb, line);
 582   sprintf (line, "%s*fsb*DirList.fontList: %s", myclass, courier);
 583   XrmPutLineResource (&rdb, line);
 584
 585   /* Set double click time of list boxes in the file selection
 586      dialog from `double-click-time'.  */
 587   if (INTEGERP (Vdouble_click_time) && XINT (Vdouble_click_time) > 0)
 588     {
 589       sprintf (line, "%s*fsb*DirList.doubleClickInterval: %d",
 590                myclass, XFASTINT (Vdouble_click_time));
 591       XrmPutLineResource (&rdb, line);
 592       sprintf (line, "%s*fsb*ItemsList.doubleClickInterval: %d",
 593                myclass, XFASTINT (Vdouble_click_time));
 594       XrmPutLineResource (&rdb, line);
 595     }
 596
 597 #else /* not USE_MOTIF */
 598
 599   sprintf (line, "Emacs.dialog*.font: %s", helv);
 600   XrmPutLineResource (&rdb, line);
 601   sprintf (line, "Emacs.dialog*.background: grey75");
 602   XrmPutLineResource (&rdb, line);
 603   sprintf (line, "*XlwMenu*font: %s", helv);
 604   XrmPutLineResource (&rdb, line);
 605   sprintf (line, "*XlwMenu*background: grey75");
 606   XrmPutLineResource (&rdb, line);
 607   sprintf (line, "Emacs*verticalScrollBar.background: grey75");
 608   XrmPutLineResource (&rdb, line);
 609
 610 #endif /* not USE_MOTIF */
 611
 612   user_database = get_user_db (display);
 613
 614   /* Figure out what the "customization string" is, so we can use it
 615      to decode paths.  */
 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 (inhibit_x_resources)
 699     /* --quick was passed, so this is a no-op.  */
 700     return NULL;
 701
 702   if (x_get_resource (rdb, name, class, x_rm_string, &value))
 703     return (char *) value.addr;
 704
 705   return (char *) 0;
 706 }
 707 \f
 708 /* Stand-alone test facilities.  */
 709
 710 #ifdef TESTRM
 711
 712 typedef char **List;
 713 #define arg_listify(len, list) (list)
 714 #define car(list) (*(list))
 715 #define cdr(list) (list + 1)
 716 #define NIL(list) (! *(list))
 717 #define free_arglist(list)
 718
 719 static List
 720 member (elt, list)
 721      char *elt;
 722      List list;
 723 {
 724   List p;
 725
 726   for (p = list; ! NIL (p); p = cdr (p))
 727     if (! strcmp (elt, car (p)))
 728       return p;
 729
 730   return p;
 731 }
 732
 733 static void
 734 fatal (msg, prog, x1, x2, x3, x4, x5)
 735     char *msg, *prog;
 736     int x1, x2, x3, x4, x5;
 737 {
 738     if (errno)
 739       perror (prog);
 740
 741     (void) fprintf (stderr, msg, prog, x1, x2, x3, x4, x5);
 742     exit (1);
 743 }
 744
 745 main (argc, argv)
 746     int argc;
 747     char **argv;
 748 {
 749   Display *display;
 750   char *displayname, *resource_string, *class, *name;
 751   XrmDatabase xdb;
 752   List arg_list, lp;
 753
 754   arg_list = arg_listify (argc, argv);
 755
 756   lp = member ("-d", arg_list);
 757   if (!NIL (lp))
 758     displayname = car (cdr (lp));
 759   else
 760     displayname = "localhost:0.0";
 761
 762   lp = member ("-xrm", arg_list);
 763   if (! NIL (lp))
 764     resource_string = car (cdr (lp));
 765   else
 766     resource_string = (char *) 0;
 767
 768   lp = member ("-c", arg_list);
 769   if (! NIL (lp))
 770     class = car (cdr (lp));
 771   else
 772     class = "Emacs";
 773
 774   lp = member ("-n", arg_list);
 775   if (! NIL (lp))
 776     name = car (cdr (lp));
 777   else
 778     name = "emacs";
 779
 780   free_arglist (arg_list);
 781
 782   if (!(display = XOpenDisplay (displayname)))
 783     fatal ("Can't open display '%s'\n", XDisplayName (displayname));
 784
 785   xdb = x_load_resources (display, resource_string, name, class);
 786
 787   /* In a real program, you'd want to also do this: */
 788   display->db = xdb;
 789
 790   while (1)
 791     {
 792       char query_name[90];
 793       char query_class[90];
 794
 795       printf ("Name: ");
 796       gets (query_name);
 797
 798       if (strlen (query_name))
 799         {
 800           char *value;
 801
 802           printf ("Class: ");
 803           gets (query_class);
 804
 805           value = x_get_string_resource (xdb, query_name, query_class);
 806
 807           if (value != NULL)
 808             printf ("\t%s(%s):  %s\n\n", query_name, query_class, value);
 809           else
 810             printf ("\tNo Value.\n\n");
 811         }
 812       else
 813         break;
 814     }
 815   printf ("\tExit.\n\n");
 816
 817   XCloseDisplay (display);
 818 }
 819 #endif /* TESTRM */
 820
 821 /* arch-tag: 37e6fbab-ed05-4363-9e76-6c4109ed511f
 822    (do not change this comment) */