#include <fcntl.h>
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>

int main(int argc, char **argv)
{
	int fd;
	
	if ( argc < 3 ){
		fprintf(stderr,"Usage: %s file command\n", argv[0]);
		exit(1);
	}

	close(1);
	fd=open(argv[1], O_WRONLY | O_SYNC);
	if ( fd != 1 ){
		perror("open");
		exit(1);
	}
	execvp (argv[2], argv+2);
	perror("exec");
	exit(1);
}