UTILITIES/x11idle.c

   1 #include <X11/extensions/scrnsaver.h>
   2 #include <stdio.h>
   3
   4 /* Based on code from
   5  * http://coderrr.wordpress.com/2008/04/20/getting-idle-time-in-unix/
   6  *
   7  * compile with 'gcc -l Xss x11idle.c -o x11idle' and copy x11idle into your
   8  * path
   9  */
  10 main() {
  11     XScreenSaverInfo *info = XScreenSaverAllocInfo();
  12     //open the display specified by the DISPLAY environment variable
  13     Display *display = XOpenDisplay(0);
  14
  15     //display could be null if there is no X server running
  16     if (info == NULL || display == NULL) {
  17     return -1;
  18     }
  19
  20     //X11 is running, try to retrieve info
  21     if (XScreenSaverQueryInfo(display, DefaultRootWindow(display), info) == 0) {
  22         return -1;
  23     }
  24
  25     //info was retrieved successfully, print idle time
  26     printf("%lu\n", info->idle);
  27     return 0;
  28 }