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.Dd December 21, 2001 35.Dt MAC_FREE 3 36.Os 37.Sh NAME 38.Nm mac_free 39.Nd free MAC label 40.Sh LIBRARY 41.Lb libc 42.Sh SYNOPSIS 43.In sys/mac.h 44.Ft int 45.Fn mac_free "mac_t label" 46.Sh DESCRIPTION 47The 48.Fn mac_free 49function frees the storage allocated to contain a 50.Vt mac_t . 51.Sh RETURN VALUES 52The 53.Fn mac_free 54function always returns 0. 55WARNING: see the notes in the 56.Sx BUGS 57section regarding the use of this 58function. 59.Sh SEE ALSO 60.Xr mac 3 , 61.Xr mac_get 3 , 62.Xr mac_prepare 3 , 63.Xr mac_set 3 , 64.Xr mac_text 3 , 65.Xr posix1e 3 , 66.Xr mac 4 , 67.Xr mac 9 68.Sh STANDARDS 69POSIX.1e is described in IEEE POSIX.1e draft 17. 70Discussion of the draft 71continues on the cross-platform POSIX.1e implementation mailing list. 72To join this list, see the 73.Fx 74POSIX.1e implementation page 75for more information. 76.Sh HISTORY 77Support for Mandatory Access Control was introduced in 78.Fx 5.0 79as part of the 80.Tn TrustedBSD 81Project. 82.Sh BUGS 83POSIX.1e specifies that 84.Fn mac_free 85will be used to free text strings created using 86.Xr mac_to_text 3 . 87Because 88.Vt mac_t 89is a complex structure in the 90.Tn TrustedBSD 91implementation, 92.Fn mac_free 93is specific to 94.Vt mac_3 , 95and must not be used to free the character strings returned from 96.Fn mac_to_text . 97Doing so may result in undefined behavior. 98