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100 lines
3.1 KiB
Groff
100 lines
3.1 KiB
Groff
.\" Copyright (c) 2001, 2002 Networks Associates Technology, Inc.
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.\" All rights reserved.
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.\"
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.\" This software was developed for the FreeBSD Project by Chris
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.\" Costello at Safeport Network Services and NAI Labs, the Security
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.\" Research Division of Network Associates, Inc. under DARPA/SPAWAR
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.\" contract N66001-01-C-8035 ("CBOSS"), as part of the DARPA CHATS
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.\" research program.
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.\"
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.\" Redistribution and use in source and binary forms, with or without
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.\" modification, are permitted provided that the following conditions
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.\" are met:
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.\" 1. Redistributions of source code must retain the above copyright
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.\" notice, this list of conditions and the following disclaimer.
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.\" 2. Redistributions in binary form must reproduce the above copyright
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.\" notice, this list of conditions and the following disclaimer in the
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.\" documentation and/or other materials provided with the distribution.
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.\" 3. The name of the author may not be used to endorse or promote
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.\" products derived from this software without specific prior written
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.\" permission.
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.\"
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.\" THIS SOFTWARE IS PROVIDED BY THE AUTHORS AND CONTRIBUTORS ``AS IS'' AND
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.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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.\" ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHORS OR CONTRIBUTORS BE LIABLE
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.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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.\" SUCH DAMAGE.
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.\"
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.\" $FreeBSD$
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.\"
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.Dd December 21, 2001
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.Dt MAC_FREE 3
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.Os
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.Sh NAME
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.Nm mac_free
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.Nd free MAC label
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.Sh LIBRARY
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.Lb libc
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.Sh SYNOPSIS
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.In sys/mac.h
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.Ft int
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.Fn mac_free "mac_t label"
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.Sh DESCRIPTION
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The
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.Fn mac_free
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function frees the storage allocated to contain a
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.Vt mac_t .
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.Sh RETURN VALUES
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The
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.Fn mac_free
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function always returns 0.
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WARNING: see the notes in the
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.Sx BUGS
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section regarding the use of this
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function.
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.Sh SEE ALSO
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.Xr mac 3 ,
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.Xr mac_get 3 ,
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.Xr mac_prepare 3 ,
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.Xr mac_set 3 ,
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.Xr mac_text 3 ,
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.Xr posix1e 3 ,
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.Xr mac 4 ,
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.Xr mac 9
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.Sh STANDARDS
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POSIX.1e is described in IEEE POSIX.1e draft 17.
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Discussion of the draft
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continues on the cross-platform POSIX.1e implementation mailing list.
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To join this list, see the
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.Fx
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POSIX.1e implementation page
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for more information.
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.Sh HISTORY
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Support for Mandatory Access Control was introduced in
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.Fx 5.0
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as part of the
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.Tn TrustedBSD
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Project.
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.Sh BUGS
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POSIX.1e specifies that
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.Fn mac_free
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will be used to free text strings created using
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.Xr mac_to_text 3 .
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Because
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.Vt mac_t
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is a complex structure in the
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.Tn TrustedBSD
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implementation,
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.Fn mac_free
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is specific to
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.Vt mac_3 ,
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and must not be used to free the character strings returned from
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.Fn mac_to_text .
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Doing so may result in undefined behavior.
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