150 lines
4.4 KiB
Groff
150 lines
4.4 KiB
Groff
.\" Copyright (c) 2001, 2004 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
|
|
.\" are met:
|
|
.\" 1. Redistributions of source code must retain the above copyright
|
|
.\" notice, this list of conditions and the following disclaimer.
|
|
.\" 2. Redistributions in binary form must reproduce the above copyright
|
|
.\" notice, this list of conditions and the following disclaimer in the
|
|
.\" documentation and/or other materials provided with the distribution.
|
|
.\"
|
|
.\" THIS SOFTWARE IS PROVIDED BY THE AUTHORS AND CONTRIBUTORS ``AS IS'' AND
|
|
.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
|
.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
|
|
.\" ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHORS OR CONTRIBUTORS BE LIABLE
|
|
.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
|
|
.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
|
|
.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
|
|
.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
|
|
.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
|
|
.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
|
|
.\" SUCH DAMAGE.
|
|
.\"
|
|
.\" $FreeBSD$
|
|
.\"
|
|
.Dd December 21, 2001
|
|
.Dt MAC_GET 3
|
|
.Os
|
|
.Sh NAME
|
|
.Nm mac_get_file ,
|
|
.Nm mac_get_link ,
|
|
.Nm mac_get_fd ,
|
|
.Nm mac_get_proc
|
|
.Nd get the label of a file, socket, socket peer or process
|
|
.Sh LIBRARY
|
|
.Lb libc
|
|
.Sh SYNOPSIS
|
|
.In sys/mac.h
|
|
.Ft int
|
|
.Fn mac_get_file "const char *path" "mac_t label"
|
|
.Ft int
|
|
.Fn mac_get_link "const char *path" "mac_t label"
|
|
.Ft int
|
|
.Fn mac_get_fd "int fd" "mac_t label"
|
|
.Ft int
|
|
.Fn mac_get_peer "int fd" "mac_t label"
|
|
.Ft int
|
|
.Fn mac_get_pid "pid_t pid" "mac_t label"
|
|
.Ft int
|
|
.Fn mac_get_proc "mac_t label"
|
|
.Sh DESCRIPTION
|
|
The
|
|
.Fn mac_get_file
|
|
system call returns the label associated with a file specified by
|
|
pathname.
|
|
The
|
|
.Fn mac_get_link
|
|
function is the same as
|
|
.Fn mac_get_file ,
|
|
except that it does not follow symlinks.
|
|
.Pp
|
|
The
|
|
.Fn mac_get_fd
|
|
system call returns the label associated with an object referenced by
|
|
the specified file descriptor.
|
|
Note that in the case of a file system socket, the label returned will
|
|
be the socket label, which may be different from the label of the
|
|
on-disk node acting as a rendezvous for the socket.
|
|
The
|
|
.Fn mac_get_peer
|
|
system call returns the label associated with the remote endpoint of
|
|
a socket; the exact semantics of this call will depend on the protocol
|
|
domain, communications type, and endpoint; typically this label will
|
|
be cached when a connection-oriented protocol instance is first set up,
|
|
and is undefined for datagram protocols.
|
|
.Pp
|
|
The
|
|
.Fn mac_get_pid
|
|
and
|
|
.Fn mac_get_proc
|
|
system calls return the process label associated with an arbitrary
|
|
process id, or the current process.
|
|
.Pp
|
|
Label storage for use with these calls must first be allocated and
|
|
prepared using the
|
|
.Xr mac_prepare 3
|
|
functions.
|
|
When an application is done using a label, the memory may be returned
|
|
using
|
|
.Xr mac_free 3 .
|
|
.Sh ERRORS
|
|
.Bl -tag -width Er
|
|
.It Bq Er EACCES
|
|
A component of
|
|
.Fa path
|
|
is not searchable,
|
|
or MAC read access to the file
|
|
is denied.
|
|
.It Bq Er EINVAL
|
|
The requested label operation is not valid for the object referenced by
|
|
.Fa fd .
|
|
.It Bq Er ENAMETOOLONG
|
|
The pathname pointed to by
|
|
.Fa path
|
|
exceeds
|
|
.Dv PATH_MAX ,
|
|
or a component of the pathname exceeds
|
|
.Dv NAME_MAX .
|
|
.It Bq Er ENOENT
|
|
A component of
|
|
.Fa path
|
|
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
|
|
is not a directory.
|
|
.El
|
|
.Sh SEE ALSO
|
|
.Xr mac 3 ,
|
|
.Xr mac_free 3 ,
|
|
.Xr mac_prepare 3 ,
|
|
.Xr mac_set 3 ,
|
|
.Xr mac_text 3 ,
|
|
.Xr mac 4 ,
|
|
.Xr mac 9
|
|
.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.
|
|
.Sh HISTORY
|
|
Support for Mandatory Access Control was introduced in
|
|
.Fx 5.0
|
|
as part of the
|
|
.Tn TrustedBSD
|
|
Project.
|