.\" Copyright (c) 2001 Networks Associates Technology, Inc.
.\" 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.
.\" 
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.\" 3. The name of the author may not be used to endorse or promote
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.\" $FreeBSD$
.Dd December 21, 2001
.Dt MAC_TEXT 3
.Sh NAME
.Nm mac_from_text ,
.Nm mac_to_text
.Nd convert MAC label to/from text representation
.Sh LIBRARY
.Lb libc
.Sh SYNOPSIS
.In sys/mac.h
.Ft mac_t
.Fn mac_from_text "const char *text_p"
.Ft "char *"
.Fn mac_to_text "mac_t label" "size_t *len_p"
.Sh DESCRIPTION
The
.Fn mac_from_text
function converts the text representation of a label
into a
.Vt mac_t ,
which must later be freed with
.Xr mac_free .
The
.Fn mac_to_text
function returns
the text representation of
.Fa label
and sets
.Fa *len_p
to the length of the returned string.
.Pp
Refer to
.Xr maclabel 7
for the MAC label format.
.Sh RETURN VALUES
The
.Fn mac_from_text
function returns a valid
.Vt mac_t
equivalent to
the MAC label described in
.Fa text_p
upon success, and
.Dv NULL
upon failure, setting
.Va errno
to indicate the error.
.Pp
The
.Fn mac_to_text
function returns a string
containing the text representation of
.Fa label
upon success, and
.Dv NULL
upon failure, setting
.Va errno
to indicate the error.
.Sh COMPATIBILITY
POSIX.1e does not define
a text format for text representations
of MAC labels.
.Sh ERRORS
.Bl -tag -width Er
.It Bq Er EINVAL
An invalid policy or qualifier
was specified in
.Fa text_p ,
or an invalid MAC label
was specified in
.Fa label .
.It 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_set 3 ,
.Xr maclabel 7
.Sh STANDARDS
POSIX.1e is described in IEEE POSIX.1e draft 17.
Discussion of the draft
continues on the cross-platform POSIX.1e implementation mailing list.
To join this list, see the
.Fx
POSIX.1e implementation page
for more information.