2 * Copyright (c) 2006 nCircle Network Security, Inc.
5 * This software was developed by Robert N. M. Watson for the TrustedBSD
6 * Project under contract to nCircle Network Security, Inc.
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
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.
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.
33 * Test that sysctls can only be written with privilege by trying first with,
34 * then without privilege. Do this by first reading, then setting the
35 * hostname as a no-op.
38 #include <sys/types.h>
39 #include <sys/sysctl.h>
48 #define KERN_HOSTNAME_STRING "kern.hostname"
51 priv_sysctl_write(void)
60 * First query the current value.
63 error = sysctlbyname(KERN_HOSTNAME_STRING, buffer, &len, NULL, 0);
65 err(-1, "sysctlbyname(\"%s\") query", KERN_HOSTNAME_STRING);
68 * Now try to set with privilege.
70 error = sysctlbyname(KERN_HOSTNAME_STRING, NULL, NULL, buffer,
73 err(-1, "sysctlbyname(\"%s\") set as root",
74 KERN_HOSTNAME_STRING);
77 * Now without privilege.
81 error = sysctlbyname(KERN_HOSTNAME_STRING, NULL, NULL, buffer,
84 errx(-1, "sysctlbyname(\"%s\") succeeded as !root",
85 KERN_HOSTNAME_STRING);
87 err(-1, "sysctlbyname(\"%s\") wrong errno %d",
88 KERN_HOSTNAME_STRING, errno);