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

int main(void) {
    char foo[48], bar[51], baz[49];
    int fd = open("buccaneer.txt", O_RDONLY);
    if (fd == -1) {
        perror("open");
        return 1;
    }

    // setup our iovec structures
    struct iovec iov[3];
    iov[0].iov_base = foo;
    iov[0].iov_len = sizeof(foo);
    iov[1].iov_base = bar;
    iov[1].iov_len = sizeof(bar);
    iov[2].iov_base = baz;
    iov[2].iov_len = sizeof(baz);

    // read into the structures with a single call
    int nr = readv(fd, iov, 3);
    if (nr == -1) {
        perror("readv");
        return 1;
    }

    for (int i = 0; i < 3; i++)
        printf("%d: %s", i, (char *)iov[i].iov_base);

    if (close(fd)) {
        perror("close");
        return 1;
    }

    return 0;
}