xscreensaversuspendtest.c


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//
// XScreenSaverSuspend() test program
//
// gcc -g -Wall -o xscreensaversuspendtest xscreensaversuspendtest.c -lX11 -lXss
//

#include <assert.h>
#include <stdio.h>
#include <stdbool.h>
#include <unistd.h>
#include <X11/extensions/scrnsaver.h>

int
main()
{
  Display *dpy = XOpenDisplay(NULL);
  assert(dpy);

  int event_base;
  int error_base;
  assert(XScreenSaverQueryExtension(dpy, &event_base, &error_base));

  int major_version;
  int minor_version;
  assert(XScreenSaverQueryVersion(dpy, &major_version, &minor_version));
  printf("Xscreensaver version %d.%d\n", major_version, minor_version);

  XScreenSaverSuspend(dpy, true);
  XFlush(dpy);

  // suspend screensaver until we are killed
  while (true)
    {
      sleep(1);
    }

  return 0;
}