#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <fcntl.h>
#define SZBUF 256
int main(int argc, char *argv[]){
	int fs, n;
	char buf[SZBUF];
	if (argc < 2){
		fprintf(stderr, "Usage : %s <SRC_FILE>\n", argv[0]);
		exit(1);
	}
	fs = open(argv[1], O_RDONLY);
	if (fs == -1){
		perror("File opening fails");
		exit(2);
	}
	while (n = read(fs, buf, SZBUF))
		write(1, buf, n);
	close(fs);
	exit(0);
	return EXIT_SUCCESS;
}