1.\" Copyright (c) 2002 Networks Associates Technology, Inc. 2.\" All rights reserved. 3.\" 4.\" This software was developed for the FreeBSD Project by Chris 5.\" Costello at Safeport Network Services and NAI Labs, the Security 6.\" Research Division of Network Associates, Inc. under DARPA/SPAWAR 7.\" contract N66001-01-C-8035 ("CBOSS"), as part of the DARPA CHATS 8.\" research program. 9.\" 10.\" Redistribution and use in source and binary forms, with or without 11.\" modification, are permitted provided that the following conditions 12.\" are met: 13.\" 1. Redistributions of source code must retain the above copyright 14.\" notice, this list of conditions and the following disclaimer. 15.\" 2. Redistributions in binary form must reproduce the above copyright 16.\" notice, this list of conditions and the following disclaimer in the 17.\" documentation and/or other materials provided with the distribution. 18.\" 19.\" THIS SOFTWARE IS PROVIDED BY THE AUTHORS AND CONTRIBUTORS ``AS IS'' AND 20.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 21.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 22.\" ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHORS OR CONTRIBUTORS BE LIABLE 23.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 24.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 25.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 26.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 27.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 28.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 29.\" SUCH DAMAGE. 30.\" 31.Dd July 7, 2006 32.Dt MAC_IS_PRESENT 3 33.Os 34.Sh NAME 35.Nm mac_is_present 36.Nd report whether the running system has MAC support 37.Sh LIBRARY 38.Lb libc 39.Sh SYNOPSIS 40.In sys/mac.h 41.Ft int 42.Fn mac_is_present "const char *policyname" 43.Sh DESCRIPTION 44The 45.Fn mac_is_present 46function determines whether the currently-running kernel supports MAC for 47a given policy or not. 48If 49.Fa policyname 50is 51.Pf non- Dv NULL , 52the presence of the named policy 53(e.g.\& 54.Dq Li biba , 55.Dq Li mls , 56.Dq Li te ) 57is checked, otherwise the presence of any MAC policies at all is checked. 58.Sh RETURN VALUES 59If the system supports the given MAC policy, the value 1 is returned. 60If the specified MAC policy is not supported, the value 0 is returned. 61If an error occurs, the value \-1 is returned. 62.Sh ERRORS 63.Bl -tag -width Er 64.It Bq Er EINVAL 65The value of 66.Fa policyname 67is not valid. 68.It Bq Er ENOMEM 69Insufficient memory was available to allocate internal storage. 70.El 71.Sh SEE ALSO 72.Xr mac 3 , 73.Xr mac_free 3 , 74.Xr mac_get 3 , 75.Xr mac_prepare 3 , 76.Xr mac_set 3 , 77.Xr mac_text 3 , 78.Xr mac 4 , 79.Xr mac 9 80.Sh HISTORY 81Support for Mandatory Access Control was introduced in 82.Fx 5.0 83as part of the 84.Tn TrustedBSD 85Project. 86