org-mode/UTILITIES/x11idle.c

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#include <X11/extensions/scrnsaver.h>
#include <stdio.h>
/* Based on code from
* http://coderrr.wordpress.com/2008/04/20/getting-idle-time-in-unix/
*
* compile with 'gcc -l Xss x11idle.c -o x11idle' and copy x11idle into your
* path
*/
main() {
Status querry = 0;
XScreenSaverInfo *info = XScreenSaverAllocInfo();
//open the display specified by the DISPLAY environment variable
Display *display = XOpenDisplay(0);
//display could be null if there is no X server running
if (info == NULL || display == NULL) {
return -1;
}
//X11 is running, retrieve and print idle time
querry = XScreenSaverQueryInfo(display, DefaultRootWindow(display), info);
if (querry == 0) {
return -1;
}
//idle time was retrieved successfully, print it
printf("%u\n", info->idle);
return 0;
}