2 * Copyright (c) 2006 nCircle Network Security, Inc.
3 * Copyright (c) 2007 Robert N. M. Watson
6 * This software was developed by Robert N. M. Watson for the TrustedBSD
7 * Project under contract to nCircle Network Security, Inc.
9 * Redistribution and use in source and binary forms, with or without
10 * modification, are permitted provided that the following conditions
12 * 1. Redistributions of source code must retain the above copyright
13 * notice, this list of conditions and the following disclaimer.
14 * 2. Redistributions in binary form must reproduce the above copyright
15 * notice, this list of conditions and the following disclaimer in the
16 * documentation and/or other materials provided with the distribution.
18 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
19 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
20 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
21 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR, NCIRCLE NETWORK SECURITY,
22 * INC., OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
23 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED
24 * TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
25 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
26 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
27 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
28 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
34 * Test privilege check on /dev/io. By default, the permissions also protect
35 * against non-superuser access, so this program will modify permissions on
36 * /dev/io to allow world access, and revert the change on exit. This is not
37 * good for run-time security, but is necessary to test the checks properly.
40 #include <sys/types.h>
50 #define NEW_PERMS 0666
51 #define DEV_IO "/dev/io"
52 #define EXPECTED_PERMS 0600
54 static int initialized;
55 static mode_t saved_perms;
58 priv_io_setup(int asroot, int asjail, struct test *test)
62 if (stat(DEV_IO, &sb) < 0) {
63 warn("priv_io_setup: stat(%s)", DEV_IO);
66 saved_perms = sb.st_mode & ALLPERMS;
67 if (saved_perms != EXPECTED_PERMS) {
68 warnx("priv_io_setup: perms = 0%o; expected 0%o",
69 saved_perms, EXPECTED_PERMS);
72 if (chmod(DEV_IO, NEW_PERMS) < 0) {
73 warn("priv_io_setup: chmod(%s, 0%o)", DEV_IO, NEW_PERMS);
81 priv_io(int asroot, int injail, struct test *test)
85 fd = open(DEV_IO, O_RDONLY);
91 expect("priv_io(asroot, injail)", error, -1, EPERM);
92 if (asroot && !injail)
93 expect("priv_io(asroot, !injail)", error, 0, 0);
94 if (!asroot && injail)
95 expect("priv_io(!asroot, injail)", error, -1, EPERM);
96 if (!asroot && !injail)
97 expect("priv_io(!asroot, !injail)", error, -1, EPERM);
103 priv_io_cleanup(int asroot, int asjail, struct test *test)
108 if (chmod(DEV_IO, saved_perms) < 0)
109 err(-1, "priv_io_cleanup: chmod(%s, 0%o)", DEV_IO,