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#include "apue.h"
#include <stdio.h>
#include <fcntl.h>
#define BUFFSIZE 4096
int main(int argc, char **argv) {
int n;
char buf[BUFFSIZE];
if (argc != 2) {
printf("Usage: %s <file to output>", argv[0]);
exit(1);
}
int fd = open(argv[1], O_RDONLY);
while ((n = read(fd, buf, BUFFSIZE)) > 0)
if (write(STDOUT_FILENO, buf, n) != n)
err_sys("write error");
if (n < 0)
err_sys("read error");
exit(0);
}
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