priv_vfs_fhstatfs.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_vfs_fhstatfs.c 162271 2006-09-13 09:05:39Z rwatson $
30 */
31
32/*
33 * Confirm that calls to fhstatfs() require privilege, trying with, and
34 * without.  We create a temporary file and grab the file handle using
35 * getfh() before starting.
36 */
37
38#include <sys/param.h>
39#include <sys/mount.h>
40
41#include <err.h>
42#include <errno.h>
43#include <unistd.h>
44
45#include "main.h"
46
47void
48priv_vfs_fhstatfs(void)
49{
50	char fpath[1024];
51	struct statfs sf;
52	fhandle_t fh;
53	int error;
54
55	assert_root();
56
57	setup_file(fpath, UID_ROOT, GID_WHEEL, 0644);
58
59	if (getfh(fpath, &fh) < 0) {
60		warn("getfh(%s)", fpath);
61		goto out;
62	}
63
64	/*
65	 * First, try with privilege.
66	 */
67	if (fhstatfs(&fh, &sf) < 0) {
68		warn("fhstatfs(%s) as root", fpath);
69		goto out;
70	}
71
72	/*
73	 * Now, without privilege.
74	 */
75	set_euid(UID_OTHER);
76
77	error = fhstatfs(&fh, &sf);
78	if (error == 0) {
79		warnx("fhstatfs(%s) succeeded as !root", fpath);
80		goto out;
81	}
82	if (errno != EPERM) {
83		warn("fhstatfs(%s) wrong errno %d as !root", fpath, errno);
84		goto out;
85	}
86out:
87	seteuid(UID_ROOT);
88	(void)unlink(fpath);
89}
90