#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <fcntl.h>
#define SZBUF 256

int main(int argc, char *argv[]){
	int fd, m, n;
	char buf[SZBUF];
	if (argc < 2){
		fprintf(stderr, "Usage : %s <DST_FILE>\n", argv[0]);
		exit(1);
	}
	fd = open(argv[1], O_WRONLY|O_TRUNC|O_CREAT ,0644);
	if (fd == -1){
		perror("Cannot open destination file");
		exit(2);
	}
	write(1, "Nomb --> ", 9);
	while (n=read(0, buf, SZBUF)){
		m=write(fd, buf, n);
		if (n == -1){
			perror("Writing in file fails");
			exit(3);
		}
		write(1, "Nomb --> ", 9);
	}
		close(fd);
		return EXIT_SUCCESS;
}