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

const size_t BUFF_SIZE = 1024;

int main(int argc, char* argv[]) {
	int fd_in = 0;
	if (argc > 1)
		fd_in = open(argv[1], O_RDONLY);

	char buf[BUFF_SIZE];
	int actual = read(fd_in, buf, BUFF_SIZE);
	while (actual > 0) {
		printf("%s", buf);
		actual = read(fd_in, buf, BUFF_SIZE);
	}
	return 0;
}