#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <sys/ioctl.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <time.h>

#define SYSCALL(s) do { if((s)<0) { perror(#s); exit(1); } } while(0)

#define APM_IOC_SETRTC 0x4146
#define APM_IOC_GETRTC 0x4147

int
main() {
	int fd;
	time_t t;

	SYSCALL( fd = open("/dev/apm_bios", O_RDWR) );
	time(&t);
	SYSCALL( ioctl(fd, APM_IOC_SETRTC, (void*)&t) );
	SYSCALL( close(fd) );

	return 0;
}