/*      $OpenBSD: fchdir.c,v 1.2 2017/03/08 18:42:28 deraadt Exp $ */

/*
 *      Written by Philip Guenther <guenther@openbsd.org> 2011 Public Domain.
 *
 *      Verify errno returns from fchdir()
 */
#include <sys/types.h>
#include <sys/socket.h>
#include <err.h>
#include <errno.h>
#include <fcntl.h>
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>

int
main(int argc, char *argv[])
{
        int fds[2];
        int fd;

        if ((fd = open("/etc/passwd", O_RDONLY)) == -1)
                err(1, "open");
        if (fchdir(fd) == 0)
                errx(1, "fchdir file succeeded");
        if (errno != ENOTDIR)
                err(1, "fchdir file: wrong errno");
        close(fd);

        if (pipe(fds))
                err(1, "pipe");
        if (fchdir(fds[0]) == 0)
                errx(1, "fchdir pipe succeeded");
        if (errno != ENOTDIR)
                err(1, "fchdir pipe: wrong errno");
        close(fds[0]);
        close(fds[1]);

        if ((fd = socket(AF_UNIX, SOCK_STREAM, 0)) == -1)
                err(1, "socket");
        if (fchdir(fd) == 0)
                errx(1, "fchdir socket succeeded");
        if (errno != ENOTDIR)
                err(1, "fchdir socket: wrong errno");
        close(fd);

        if (fchdir(fd) == 0)
                errx(1, "fchdir bad fd succeeded");
        if (errno != EBADF)
                err(1, "fchdir bad fd: wrong errno");

        return 0;
}