xgetclass.c

   1 /*
   2  * Prints window's ClassHint
   3  * Copyright 2005,2006 by Michal Nazarewicz <mina86@mina86.com>
   4  *
   5  * This program is free software; you can redistribute it and/or modify
   6  * it under the terms of the GNU General Public License as published by
   7  * the Free Software Foundation; either version 3 of the License, or
   8  * (at your option) any later version.
   9  *
  10  * This program is distributed in the hope that it will be useful,
  11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13  * GNU General Public License for more details.
  14  *
  15  * You should have received a copy of the GNU General Public License
  16  * along with this program; if not, see <http://www.gnu.org/licenses/>.
  17  *
  18  * This is part of Tiny Applications Collection
  19  *   -> http://tinyapps.sourceforge.net/
  20  */
  21
  22 /*
  23  * Compilation:
  24  *     <CC> -O2 $CFLAGS -I<X11_INC_DIR> -L<X11_LIB_DIR> -lX11 \
  25  *         -o xgetclass xgetclass.c
  26  * Where:
  27  *     <CC>          - C Compiler (eg. gcc)
  28  *     <X11_INC_DIR> - Path to X11's header files (eg. /usr/X11R6/include)
  29  *     <X11_LIB_DIR> - Path to X11's libraries (eg. /usr/X11R6/lib)
  30  */
  31
  32 /*
  33  * Invocation: xgetclass <wnd-id>
  34  * Result:     Prints aplication name and class (in separate lines) of
  35  *             window with ID given as an argument.
  36  */
  37
  38
  39 #include <stdio.h>
  40 #include <stdlib.h>
  41 #include <X11/Xlib.h>
  42 #include <X11/Xutil.h>
  43
  44
  45 int main(int argc, char **argv) {
  46         char *c;
  47         unsigned long wnd;
  48         Display *display;
  49         XClassHint class;
  50
  51         /* Get executable name */
  52         for (c = *argv; *c; ++c) {
  53                 if (*c=='/' && c[1]) {
  54                         *argv = ++c;
  55                 }
  56         }
  57
  58         /* Invalid number of arguments */
  59         if (argc!=2) {
  60                 fprintf(stderr, "usage: %s <wnd-id>\n", *argv);
  61                 return 1;
  62         }
  63
  64         /* Parse win id */
  65         wnd = strtoul(argv[1], &c, 0);
  66         if (*c) {
  67                 fprintf(stderr, "usage: %s <wnd-id>\n", *argv);
  68                 return 1;
  69         }
  70
  71         /* Open display */
  72         c = XDisplayName(0);
  73         if (!(display = XOpenDisplay(c))) {
  74                 fprintf(stderr, "%s: can't open display %s\n", *argv, c);
  75                 return 1;
  76         }
  77
  78         /* Get class */
  79         XGetClassHint(display, wnd, &class);
  80
  81         /* Print */
  82         printf("%s\n%s\n", class.res_name, class.res_class);
  83         XFree(class.res_name);
  84         XFree(class.res_class);
  85         return 0;
  86 }