/*
 *  call-seq:
 *     Dir.chroot( string ) => 0
 *
 *  Changes this process's idea of the file system root. Only a
 *  privileged process may make this call. Not available on all
 *  platforms. On Unix systems, see <code>chroot(2)</code> for more
 *  information.
 */
static VALUE
dir_s_chroot(VALUE dir, VALUE path)
{
#if defined(HAVE_CHROOT) && !defined(__CHECKER__)
    check_dirname(&path);

    if (chroot(RSTRING_PTR(path)) == -1)
        rb_sys_fail(RSTRING_PTR(path));

    return INT2FIX(0);
#else
    rb_notimplement();
    return Qnil;                /* not reached */
#endif
}