150 lines
4.0 KiB
Groff
150 lines
4.0 KiB
Groff
.\" Copyright (c) 2001 Networks Associates Technology, Inc.
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.\" All rights reserved.
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.\"
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.\" This software was developed for the FreeBSD Project by Chris
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.\" Costello at Safeport Network Services and NAI Labs, the Security
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.\" Research Division of Network Associates, Inc. under DARPA/SPAWAR
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.\" contract N66001-01-C-8035 ("CBOSS"), as part of the DARPA CHATS
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.\" research program.
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.\"
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.\" Redistribution and use in source and binary forms, with or without
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.\" modification, are permitted provided that the following conditions
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.\" are met:
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.\" 1. Redistributions of source code must retain the above copyright
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.\" notice, this list of conditions and the following disclaimer.
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.\" 2. Redistributions in binary form must reproduce the above copyright
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.\" notice, this list of conditions and the following disclaimer in the
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.\" documentation and/or other materials provided with the distribution.
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.\"
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.\" THIS SOFTWARE IS PROVIDED BY THE AUTHORS AND CONTRIBUTORS ``AS IS'' AND
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.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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.\" ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHORS OR CONTRIBUTORS BE LIABLE
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.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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.\" SUCH DAMAGE.
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.\"
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.\" $FreeBSD$
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.\"
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.Dd January 14, 2003
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.Dt MAC_SET 3
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.Os
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.Sh NAME
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.Nm mac_set_file ,
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.Nm mac_set_fd ,
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.Nm mac_set_proc
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.Nd set the MAC label for a file or process
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.Sh LIBRARY
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.Lb libc
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.Sh SYNOPSIS
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.In sys/mac.h
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.Ft int
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.Fn mac_set_file "const char *path" "mac_t label"
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.Ft int
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.Fn mac_set_link "const char *path" "mac_t label"
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.Ft int
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.Fn mac_set_fd "int fd" "mac_t label"
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.Ft int
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.Fn mac_set_proc "mac_t label"
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.Sh DESCRIPTION
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The
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.Fn mac_set_file
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and
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.Fn mac_set_fd
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functions associate a MAC label
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specified by
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.Fa label
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to the file referenced to by
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.Fa path_p ,
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or to the file descriptor
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.Fa fd ,
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respectively.
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Note that when a file descriptor references a socket, label operations
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on the file descriptor act on the socket, not on the file that may
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have been used as a rendezvous when binding the socket.
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The
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.Fn mac_set_link
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function is the same as
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.Fn mac_set_file ,
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except that it does not follow symlinks.
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.Pp
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The
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.Fn mac_set_proc
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function associates the MAC label
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specified by
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.Fa label
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to the calling process.
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.Pp
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A process is allowed to set a label for a file
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only if it has MAC write access to the file,
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and its effective user ID is equal to
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the owner of the file,
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or has appropriate privileges.
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.Sh RETURN VALUES
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.Rv -std mac_set_fd mac_set_file mac_set_link mac_set_proc
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.Sh ERRORS
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.Bl -tag -width Er
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.It Bq Er EACCES
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MAC write access to the file is denied.
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.It Bq Er EBADF
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The
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.Fa fd
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argument
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is not a valid file descriptor.
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.It Bq Er EINVAL
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The
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.Fa label
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argument
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is not a valid MAC label, or the object referenced by
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.Fa fd
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is not appropriate for label operations.
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.It Bq Er EOPNOTSUPP
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Setting MAC labels is not supported
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by the file referenced by
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.Fa fd .
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.It Bq Er EPERM
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The calling process had insufficient privilege
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to change the MAC label.
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.It Bq Er EROFS
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File system for the object being modified
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is read only.
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.It Bq Er ENAMETOOLONG
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.\" XXX POSIX_NO_TRUNC?
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The length of the pathname in
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.Fa path_p
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exceeds
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.Dv PATH_MAX ,
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or a component of the pathname
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is longer than
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.Dv NAME_MAX .
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.It Bq Er ENOENT
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The file referenced by
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.Fa path_p
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does not exist.
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.It Bq Er ENOTDIR
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A component of the pathname
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referenced by
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.Fa path_p
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is not a directory.
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.El
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.Sh SEE ALSO
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.Xr mac 3 ,
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.Xr mac_free 3 ,
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.Xr mac_get 3 ,
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.Xr mac_is_present 3 ,
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.Xr mac_prepare 3 ,
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.Xr mac_text 3 ,
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.Xr posix1e 3 ,
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.Xr mac 4 ,
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.Xr mac 9
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.Sh HISTORY
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Support for Mandatory Access Control was introduced in
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.Fx 5.0
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as part of the
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.Tn TrustedBSD
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Project.
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