priv_kenv_set.c revision 162271 
1/*-
2 * Copyright (c) 2006 nCircle Network Security, Inc.
3 * All rights reserved.
4 *
5 * This software was developed by Robert N. M. Watson for the TrustedBSD
6 * Project under contract to nCircle Network Security, Inc.
7 *
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
10 * are met:
11 * 1. Redistributions of source code must retain the above copyright
12 *    notice, this list of conditions and the following disclaimer.
13 * 2. Redistributions in binary form must reproduce the above copyright
14 *    notice, this list of conditions and the following disclaimer in the
15 *    documentation and/or other materials provided with the distribution.
16 *
17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
20 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR, NCIRCLE NETWORK SECURITY,
21 * INC., OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
22 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED
23 * TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
24 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
25 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
26 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
27 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
28 *
29 * $FreeBSD: head/tools/regression/priv/priv_kenv_set.c 162271 2006-09-13 09:05:39Z rwatson $
30 */
31
32/*
33 * Test that setting a kernel environment variable requires privilege, by
34 * first trying it with privilege, then without.
35 */
36
37#include <sys/types.h>
38
39#include <err.h>
40#include <errno.h>
41#include <kenv.h>
42#include <string.h>
43#include <unistd.h>
44
45#include "main.h"
46
47void
48priv_kenv_set(void)
49{
50	int error;
51
52	assert_root();
53
54	error = kenv(KENV_SET, KENV_VAR_NAME, KENV_VAR_VALUE,
55	    strlen(KENV_VAR_VALUE)+1);
56	if (error)
57		err(-1, "kenv(KENV_SET, ...) as root");
58
59	set_euid(UID_OTHER);
60
61	error = kenv(KENV_SET, KENV_VAR_NAME, KENV_VAR_VALUE,
62	    strlen(KENV_VAR_VALUE)+1);
63	if (error == 0)
64		errx(-1, "kenv(KENV_SET, ...) as !root succeeded");
65	if (errno != EPERM)
66		err(-1, "kenv(KENV_SET, ...) as !root wrong errno %d",
67		    errno);
68}
69