/*-
 * Copyright 2018 Aniket Pandey
 *
 * 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.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR 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 AUTHOR OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * 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
 * SUCH DAMAGE.
 */

#include <atf-c.h>
#include <fcntl.h>

#include "utils.h"

static struct pollfd fds[1];
static char buff[1024];
static const char *path = "fileforaudit";
static const char *successreg = "fileforaudit.*return,success";
static const char *failurereg = "fileforaudit.*return,failure";


ATF_TC_WITH_CLEANUP(readlink_success);
ATF_TC_HEAD(readlink_success, tc)
{
	atf_tc_set_md_var(tc, "descr", "Tests the audit of a successful "
					"readlink(2) call");
}

ATF_TC_BODY(readlink_success, tc)
{
	memset(buff, 0, sizeof(buff));
	ATF_REQUIRE_EQ(0, symlink("symlink", path));
	FILE *pipefd = setup(fds, "fr");
	ATF_REQUIRE(readlink(path, buff, sizeof(buff)-1) != -1);
	check_audit(fds, successreg, pipefd);
}

ATF_TC_CLEANUP(readlink_success, tc)
{
	cleanup();
}


ATF_TC_WITH_CLEANUP(readlink_failure);
ATF_TC_HEAD(readlink_failure, tc)
{
	atf_tc_set_md_var(tc, "descr", "Tests the audit of an unsuccessful "
					"readlink(2) call");
}

ATF_TC_BODY(readlink_failure, tc)
{
	memset(buff, 0, sizeof(buff));
	FILE *pipefd = setup(fds, "fr");
	/* Failure reason: symbolic link does not exist */
	ATF_REQUIRE_EQ(-1, readlink(path, buff, sizeof(buff)-1));
	check_audit(fds, failurereg, pipefd);
}

ATF_TC_CLEANUP(readlink_failure, tc)
{
	cleanup();
}


ATF_TC_WITH_CLEANUP(readlinkat_success);
ATF_TC_HEAD(readlinkat_success, tc)
{
	atf_tc_set_md_var(tc, "descr", "Tests the audit of a successful "
					"readlinkat(2) call");
}

ATF_TC_BODY(readlinkat_success, tc)
{
	memset(buff, 0, sizeof(buff));
	ATF_REQUIRE_EQ(0, symlink("symlink", path));
	FILE *pipefd = setup(fds, "fr");
	ATF_REQUIRE(readlinkat(AT_FDCWD, path, buff, sizeof(buff)-1) != -1);
	check_audit(fds, successreg, pipefd);
}

ATF_TC_CLEANUP(readlinkat_success, tc)
{
	cleanup();
}


ATF_TC_WITH_CLEANUP(readlinkat_failure);
ATF_TC_HEAD(readlinkat_failure, tc)
{
	atf_tc_set_md_var(tc, "descr", "Tests the audit of an unsuccessful "
					"readlinkat(2) call");
}

ATF_TC_BODY(readlinkat_failure, tc)
{
	memset(buff, 0, sizeof(buff));
	FILE *pipefd = setup(fds, "fr");
	/* Failure reason: symbolic link does not exist */
	ATF_REQUIRE_EQ(-1, readlinkat(AT_FDCWD, path, buff, sizeof(buff)-1));
	check_audit(fds, failurereg, pipefd);
}

ATF_TC_CLEANUP(readlinkat_failure, tc)
{
	cleanup();
}


ATF_TP_ADD_TCS(tp)
{
	ATF_TP_ADD_TC(tp, readlink_success);
	ATF_TP_ADD_TC(tp, readlink_failure);
	ATF_TP_ADD_TC(tp, readlinkat_success);
	ATF_TP_ADD_TC(tp, readlinkat_failure);

	return (atf_no_error());
}