freebsd-dev/usr.sbin/ugidfw/ugidfw.8

.\" Copyright (c) 2002 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.
.\" 3. The names of the authors may not be used to endorse or promote
.\"    products derived from this software without specific prior written
.\"    permission.
.\" 
.\" 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
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.\" $FreeBSD$
.Dd OCTOBER 11, 2002
.Dt UGIDFW 8
.Sh NAME
.Nm ugidfw
.Nd firewall-like access controls for file system objects
.Sh SYNOPSIS
.Nm
.Cm list
.Nm
.Cm set
.Ar rulenum
.Cm subject
.Op Cm not
.Op uid Ar uid
.Op gid Ar gid
.Cm object
.Op Cm not
.Op Cm uid Ar uid
.Op Cm gid Ar gid
.Cm mode
.Ar arswxn
.Nm
.Cm remove
.Ar rulenum
.Sh DESCRIPTION
The
.Nm
command provides an
.Xr ipfw 8 Ns -like
interface to manage accesses to file system objects by UID and GID,
supported by the
.Nm mac_bsdextended
.Xr mac 9
policy.
.Pp
The arguments are as follows:
.Bl -tag -width 6n -offset indent
.It Cm list
Produces a list of all the current
.Nm
rules in the system.
.It Xo
.Cm set Ar rulenum
.Cm subject
.Op Cm not
.Op uid Ar uid
.Op gid Ar gid
.Cm object
.Op Cm not
.Op Cm uid Ar uid
.Op Cm gid Ar gid
.Cm mode
.Ar arswxn
.Xc
Add a new rule or modify an existing rule.
The arguments are as follows:
.Bl -tag -width 7n
.It Ar rulenum
Rule number.
Entries with a lower rule number
are applied first;
placing the most frequently-matched rules at the beginning of the list
(i.e. lower-numbered)
will yield a slight performance increase.
.It Xo
.Cm subject
.Op Cm not
.Op Cm uid Ar uid
.Op Cm gid Ar gid
.Xc
Subjects performing an operation must match
(or, if
.Dq not
is specified, must
.Em not
match)
the user and group specified by
.Ar uid
and/or
.Ar gid
for the rule to be applied.
.It Xo
.Cm object
.Op Cm not
.Op Cm uid Ar uid
.Op Cm gid Ar gid
.Xc
Objects must be owned by
(or, if
.Dq not
is specified, must
.Em not
be owned by)
the user and/or group specified by
.Ar uid
and/or
.Ar gid
for the rule to be applied.
.It Cm mode Ar arswxn
Similar to
.Xr chmod 1 ,
each character represents an access mode.
If the rule applies,
the specified access permissions are enforced
for the object.
When a character is specified in the rule,
the rule will allow for the operation.
Conversely, not including it will cause the operation
to be denied.
The definitions of each character are as follows:
.Bl -tag -width 3n -compact -offset indent
.It Sq a
Administrative operations
.It Sq r
Read access
.It Sq s
Access to file attributes
.It Sq w
Write access
.It Sq x
Execute access
.It Sq n
None
.El
.El
.It Cd remove Ar rulenum
Disable and remove the rule with the specified rule number.
.El
.Sh SEE ALSO
.Xr mac 9
.Sh HISTORY
The
.Nm
command first appeared in
.Fx 5.0 .
.Sh AUTHORS
This software was contributed to the
.Fx
Project by 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.