bad_readlink.c

/*
 * Copyright (c) 2000, 2001, 2002, 2003, 2004, 2005, 2008, 2009
 *      The President and Fellows of Harvard College.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 3. Neither the name of the University nor the names of its contributors
 *    may be used to endorse or promote products derived from this software
 *    without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE UNIVERSITY AND CONTRIBUTORS ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE UNIVERSITY OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 */

/*
 * readlink
 */

#include <unistd.h>
#include <errno.h>

#include "test.h"

static
void
readlink_file(void)
{
        char buf[128];
        int fd, rv;

        fd = open_testfile("the question contains an invalid assumption");
        if (fd<0) {
                return;
        }
        close(fd);
        rv = readlink(TESTFILE, buf, sizeof(buf));
        report_test(rv, errno, EINVAL, "readlink on file");
        remove(TESTFILE);
}

static
void
readlink_dir(void)
{
        char buf[128];
        int rv;
        rv = readlink(".", buf, sizeof(buf));
        report_test(rv, errno, EISDIR, "readlink on .");
}

static
void
readlink_empty(void)
{
        char buf[128];
        int rv;
        rv = readlink("", buf, sizeof(buf));
        report_test2(rv, errno, EISDIR, EINVAL, "readlink on empty string");
}

void
test_readlink(void)
{
        test_readlink_path();
        test_readlink_buf();

        readlink_file();
        readlink_dir();
        readlink_empty();
}