freebsd-dev/lib/libc/posix1e/mac_get.3
Robert Watson d97fcfce27 Introduce support for Mandatory Access Control and extensible
kernel access control.

Extensions to libc to provide basic MAC label manipulation facilities
for userland.  These interface will be replaced in the next month
or two with more flexible interfaces, but provide sufficient support
to allow use of the Biba and MLS policies for user applications.

libc_r wrappers to follow.

Obtained from:	TrustedBSD Project
Sponsored by:	DARPA, NAI Labs
2002-08-02 21:14:42 +00:00

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3.3 KiB
Groff

.\" 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.
.\"
.\" Redistribution and use in source and binary forms, with or without
.\" modification, are permitted provided that the following conditions
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.\" notice, this list of conditions and the following disclaimer.
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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_GET 3
.Sh NAME
.Nm mac_get_file ,
.Nm mac_get_fd ,
.Nm mac_get_proc
.Nd get the label of a file, socket, socket peer or process
.Sh SYNOPSIS
.In sys/mac.h
.Ft mac_t
.Fn mac_get_file "const char *path_p"
.Ft mac_t
.Fn mac_get_fd "int fd"
.Ft mac_t
.Fn mac_get_proc
.Sh DESCRIPTION
The
.Fn mac_get_file
and
.Fn mac_get_fd
functions return the MAC label associated
with the file referenced by
the pathname pointed to by
.Fa path_p
or the file descriptor specified by
.Fa fd ,
respectively. Note this function will
fail on socket descriptors. For information on
getting MAC labels on socket descriptors see
.Xr getsockopt 2 .
The
.Fn mac_get_proc
function returns a MAC label associated
with the requesting process.
.Sh ERRORS
.Bl -tag -width Er
.It Bq Er EACCES
A component of
.Fa path_p
is not searchable,
or MAC read access to the file
is denied.
.It Bq Er ENAMETOOLONG
The pathname pointed to by
.Fa path_p
exceeds
.Dv PATH_MAX ,
or a component of the pathname exceeds
.Dv NAME_MAX .
.It Bq Er ENOENT
A component of
.Fa path_p
does not exist.
.It Bq Er ENOMEM
Insufficient memory is available
to allocate a new MAC label structure.
.It Bq Er ENOTDIR
A component of
.Fa path_p
is not a directory.
.El
.Sh SEE ALSO
.Xr mac 3 ,
.Xr mac_free 3 ,
.Xr mac_text 3 ,
.Xr mac_set 3
.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.