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 September 21, 2023 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 47 The 48 .Fn mac_free 49 function frees the storage allocated to contain a 50 .Vt mac_t . 51 .Sh RETURN VALUES 52 The 53 .Fn mac_free 54 function always returns 0. 55 WARNING: see the notes in the 56 .Sx BUGS 57 section regarding the use of this 58 function. 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 69 POSIX.1e is described in IEEE POSIX.1e draft 17. 70 .Sh HISTORY 71 Support for Mandatory Access Control was introduced in 72 .Fx 5.0 73 as part of the 74 .Tn TrustedBSD 75 Project. 76 .Sh BUGS 77 POSIX.1e specifies that 78 .Fn mac_free 79 will be used to free text strings created using 80 .Xr mac_to_text 3 . 81 Because 82 .Vt mac_t 83 is a complex structure in the 84 .Tn TrustedBSD 85 implementation, 86 .Fn mac_free 87 is specific to 88 .Vt mac_3 , 89 and must not be used to free the character strings returned from 90 .Fn mac_to_text . 91 Doing so may result in undefined behavior. 92