1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
|
.\" Copyright (c) 2002, 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 February 24, 2004
.Dt UGIDFW 8
.Os
.Sh NAME
.Nm ugidfw
.Nd "firewall-like access controls for file system objects"
.Sh SYNOPSIS
.Nm
.Cm add
.Cm subject
.Op Cm not
.Op Cm uid Ar uid
.Op Cm gid Ar gid
.Cm object
.Op Cm not
.Op Cm uid Ar uid
.Op Cm gid Ar gid
.Cm mode
.Ar arswxn
.Nm
.Cm list
.Nm
.Cm set
.Ar rulenum
.Cm subject
.Op Cm not
.Op Cm uid Ar uid
.Op Cm 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
utility provides an
.Xr ipfw 8 Ns -like
interface to manage accesses to file system objects by UID and GID,
supported by the
.Xr mac_bsdextended 4
.Xr mac 9
policy.
.Pp
The arguments are as follows:
.Bl -tag -width indent -offset indent
.It Cm add
Add a new
.Nm
rule.
.It Xo
.Cm add
.Cm subject
.Op Cm not
.Op Cm uid Ar uid
.Op Cm 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, automatically selecting the rule number.
See the description of
.Cm set
for syntax information.
.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 Cm uid Ar uid
.Op Cm 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 ".Ar rulenum"
.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
.Cm 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
.Cm 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:
.Pp
.Bl -tag -width ".Cm w" -compact -offset indent
.It Cm a
administrative operations
.It Cm r
read access
.It Cm s
access to file attributes
.It Cm w
write access
.It Cm x
execute access
.It Cm n
none
.El
.El
.It Cm remove Ar rulenum
Disable and remove the rule with the specified rule number.
.El
.Sh SEE ALSO
.Xr mac_bsdextended 4 ,
.Xr mac 9
.Sh HISTORY
The
.Nm
utility 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
.Pq Dq CBOSS ,
as part of the DARPA CHATS research program.
|