All rights reserved.
This software was developed for the FreeBSD Project by Chris
Costello at Safeport Network Services and NAI Labs, the Security
Research Division of Network Associates, Inc. under DARPA/SPAWAR
contract N66001-01-C-8035 ("CBOSS"), as part of the DARPA CHATS
research program.
Redistribution and use in source and binary forms, with or without
modification, are permitted provided that the following conditions
are met:
1. Redistributions of source code must retain the above copyright
notice, this list of conditions and the following disclaimer.
2. Redistributions in binary form must reproduce the above copyright
notice, this list of conditions and the following disclaimer in the
documentation and/or other materials provided with the distribution.
THIS SOFTWARE IS PROVIDED BY THE AUTHORS AND CONTRIBUTORS ``AS IS'' AND
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IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHORS OR CONTRIBUTORS BE LIABLE
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OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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$FreeBSD$
.Dd July 7, 2006 .Dt MAC_IS_PRESENT 3 .Os .Sh NAME .Nm mac_is_present .Nd report whether the running system has MAC support .Sh LIBRARY .Lb libc .Sh SYNOPSIS n sys/mac.h .Ft int .Fn mac_is_present "const char *policyname" .Sh DESCRIPTION The .Fn mac_is_present function determines whether the currently-running kernel supports MAC for a given policy or not. If .Fa policyname is
f non- Dv NULL , the presence of the named policy (e.g.\& .Dq Li biba , .Dq Li mls , .Dq Li te ) is checked, otherwise the presence of any MAC policies at all is checked. .Sh RETURN VALUES If the system supports the given MAC policy, the value 1 is returned. If the specified MAC policy is not supported, the value 0 is returned. If an error occurs, the value -1 is returned. .Sh ERRORS l -tag -width Er t Bq Er EINVAL The value of .Fa policyname is not valid. t Bq Er ENOMEM Insufficient memory was available to allocate internal storage. .El .Sh SEE ALSO .Xr mac 3 , .Xr mac_free 3 , .Xr mac_get 3 , .Xr mac_prepare 3 , .Xr mac_set 3 , .Xr mac_text 3 , .Xr mac 4 , .Xr mac 9 .Sh HISTORY Support for Mandatory Access Control was introduced in .Fx 5.0 as part of the .Tn TrustedBSD Project.