#include <stdio.h>

/* from <bits/fcntl.h> */

#define O_RDONLY             00
#define O_WRONLY             01
#define O_RDWR               02

/* from <unistd.h> */

#define STDIN_FILENO    0       /* Standard input.  */
#define STDOUT_FILENO   1       /* Standard output.  */
#define STDERR_FILENO   2       /* Standard error output.  */

main(int argc, char *argv[])
{
	int fd, n;
	char buf[BUFSIZ];

	fd = open(argv[1], O_RDONLY);
	while((n = read(fd, buf, sizeof buf)) > 0) {
		write(STDOUT_FILENO, buf, n);
	}
	close(fd);

	exit(0);
}