lock macosx screen from terminal

gistfile1.sh

make
./lockscreen

main.m

#import <objc/runtime.h>
#import <Foundation/Foundation.h>
#import <IOKit/IOKitLib.h>

int main() {
  io_registry_entry_t r = IORegistryEntryFromPath(kIOMasterPortDefault, "IOService:/IOResources/IODisplayWrangler");
  if (r) {
    IORegistryEntrySetCFProperty(r, CFSTR("IORequestIdle"), kCFBooleanTrue);
    IOObjectRelease(r);
  }
  return 0;
}

Makefile

TARGET=lockscreen

all: clean compile

compile:
	clang -framework Foundation -framework IOKit main.m -o ${TARGET}

clean:
	rm -f ${TARGET}

.PHONY: all