/*-
 * Copyright (c) 2006 nCircle Network Security, Inc.
 * All rights reserved.
 *
 * This software was developed by Robert N. M. Watson for the TrustedBSD
 * Project under contract to nCircle Network Security, Inc.
 *
 * 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, NCIRCLE NETWORK SECURITY,
 * INC., 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.
 *
 * $FreeBSD$
 */

/*
 * Test that setting a kernel environment variable, then trying to unset it
 * without and with privilege.
 */

#include <sys/types.h>

#include <err.h>
#include <errno.h>
#include <kenv.h>
#include <string.h>
#include <unistd.h>

#include "main.h"

void
priv_kenv_unset(void)
{
	int error;

	assert_root();

	error = kenv(KENV_SET, KENV_VAR_NAME, KENV_VAR_VALUE,
	    strlen(KENV_VAR_VALUE)+1);
	if (error)
		err(-1, "kenv(KENV_SET, ...) as root");

	error = kenv(KENV_UNSET, KENV_VAR_NAME, NULL, 0);
	if (error)
		err(-1, "kenv(KENV_UNSET, ...) as root");

	/* Set it again for !root. */
	error = kenv(KENV_SET, KENV_VAR_NAME, KENV_VAR_VALUE,
	    strlen(KENV_VAR_VALUE)+1);
	if (error)
		err(-1, "kenv(KENV_SET, ...) as root");

	set_euid(UID_OTHER);

	error = kenv(KENV_UNSET, KENV_VAR_NAME, NULL, 0);
	if (error == 0)
		errx(-1, "kenv(KENV_UNSET, ...) as !root succeeded");
	if (errno != EPERM)
		err(-1, "kenv(KENV_UNSET, ...) as !root wrong errno %d",
		    errno);
}