1.\" Copyright (c) 2001, 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.\" 3. The name of the author may not be used to endorse or promote 19.\" products derived from this software without specific prior written 20.\" permission. 21.\" 22.\" THIS SOFTWARE IS PROVIDED BY THE AUTHORS AND CONTRIBUTORS ``AS IS'' AND 23.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 24.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 25.\" ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHORS OR CONTRIBUTORS BE LIABLE 26.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 27.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 28.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 29.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 30.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 31.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 32.\" SUCH DAMAGE. 33.\" 34.\" $FreeBSD$ 35.\" 36.Dd December 21, 2001 37.Dt MAC_FREE 3 38.Os 39.Sh NAME 40.Nm mac_free 41.Nd free MAC label 42.Sh LIBRARY 43.Lb libc 44.Sh SYNOPSIS 45.In sys/mac.h 46.Ft int 47.Fn mac_free "mac_t label" 48.Sh DESCRIPTION 49The 50.Fn mac_free 51function frees the storage allocated to contain a 52.Vt mac_t . 53.Sh RETURN VALUES 54The 55.Fn mac_free 56function always returns 0. 57WARNING: see the notes in the 58.Sx BUGS 59section regarding the use of this 60function. 61.Sh SEE ALSO 62.Xr mac 3 , 63.Xr mac_get 3 , 64.Xr mac_prepare 3 , 65.Xr mac_set 3 , 66.Xr mac_text 3 , 67.Xr mac 4 , 68.Xr mac 9 69.Sh STANDARDS 70POSIX.1e is described in IEEE POSIX.1e draft 17. 71Discussion of the draft 72continues on the cross-platform POSIX.1e implementation mailing list. 73To join this list, see the 74.Fx 75POSIX.1e implementation page 76for more information. 77.Sh HISTORY 78Support for Mandatory Access Control was introduced in 79.Fx 5.0 80as part of the 81.Tn TrustedBSD 82Project. 83.Sh BUGS 84POSIX.1e specifies that 85.Fn mac_free 86will be used to free text strings created using 87.Xr mac_to_text 3 . 88Because 89.Vt mac_t 90is a complex structure in the 91.Tn TrustedBSD 92implementation, 93.Fn mac_free 94is specific to that type, and must not be used to free the character 95strings returned from 96.Fn mac_to_text . 97Doing so may result in undefined behavior, 98including application failure. 99