36-read-in-file-system-call.c

#include<unistd.h>
#include<fcntl.h>
#include<sys/stat.h>
#include<sys/types.h>
#include<stdio.h>
#include<stdlib.h>
int main()
{
int fd, sz;
char *c = (char *) calloc(100, sizeof(char));

fd = open("baz.txt", O_RDONLY);
if (fd < 0) { perror("r1"); exit(1); }

sz = read(fd, c, 20);
printf("called read(% d, c, 10). returned that"
		" %d bytes were read.\n", fd, sz);
c[sz] = '\0';
printf("Those bytes are as follows: % s\n", c);
}