displaysleep.c

// displaysleep
//
// Command to Sleep Display OSX
// http://stackoverflow.com/questions/1239439/command-to-sleep-display-osx
//
// Compile: gcc -o displaysleep -framework CoreFoundation -framework IOKIT displaysleep.c
//

#include <CoreFoundation/CoreFoundation.h>
#include <IOKit/IOKitLib.h>

/* Returns 1 on success and 0 on failure. */
int display_sleep(void)
{
  io_registry_entry_t reg = IORegistryEntryFromPath(kIOMasterPortDefault, "IOService:/IOResources/IODisplayWrangler");
  if (reg) {
    IORegistryEntrySetCFProperty(reg, CFSTR("IORequestIdle"), kCFBooleanTrue);
    IOObjectRelease(reg);
  } else {
    return 0;
  }
  return 1;
}

int main(void)
{
  if ( display_sleep() == 1 ) {
    printf("Display sleeping...\n");
  }
  else {
    printf("Failure sleep display...\n");
  }
  return 0;
}