block reading

read.c

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

int main(void)
{
    char buf[80];

    // read
    ssize_t size = read(fileno(stdin), buf, sizeof(buf));

    if (size == -1) {
        perror("read()");
        exit(EXIT_FAILURE);
    }

    printf("%s", buf);

    return EXIT_SUCCESS;
}