1 .\" Copyright (c) 1997 Todd C. Miller <Todd.Miller@courtesan.com>
2 .\" All rights reserved.
4 .\" Redistribution and use in source and binary forms, with or without
5 .\" modification, are permitted provided that the following conditions
7 .\" 1. Redistributions of source code must retain the above copyright
8 .\" notice, this list of conditions and the following disclaimer.
9 .\" 2. Redistributions in binary form must reproduce the above copyright
10 .\" notice, this list of conditions and the following disclaimer in the
11 .\" documentation and/or other materials provided with the distribution.
12 .\" 3. All advertising materials mentioning features or use of this software
13 .\" must display the following acknowledgment:
14 .\" This product includes software developed by Todd C. Miller.
15 .\" 4. The name of the author may not be used to endorse or promote products
16 .\" derived from this software without specific prior written permission.
18 .\" THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES,
19 .\" INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY
20 .\" AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL
21 .\" THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
22 .\" EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
23 .\" PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
24 .\" OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
25 .\" WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
26 .\" OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
27 .\" ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
29 .\" $OpenBSD: fsirand.8,v 1.6 1997/02/23 03:58:26 millert Exp $
30 .\" $FreeBSD: src/sbin/fsirand/fsirand.8,v 1.10.2.4 2003/02/23 20:17:15 trhodes Exp $
31 .\" $DragonFly: src/sbin/fsirand/fsirand.8,v 1.2 2003/06/17 06:27:32 dillon Exp $
38 .Nd randomize inode generation numbers
49 utility installs random generation numbers on all the inodes for
50 each file system specified on the command line by
52 This increases the security of NFS-exported file systems by making
53 it difficult to ``guess'' filehandles.
57 now does the equivalent of
59 itself so it is no longer necessary to
62 by hand on a new file system. It is only used to
63 re-randomize or report on an existing file system.
67 utility should only be used on an unmounted file system that
70 or a file system that is mounted read-only.
73 utility may be used on the root file system in single-user mode
74 but the system should be rebooted via ``reboot -n'' afterwards.
76 .Bl -tag -width indent
77 The available options are as follows:
79 Use the default block size (usually 512 bytes) instead
80 of the value gleaned from the disklabel.
84 to run even if the file system on
86 is not marked as clean.
88 Print the current generation numbers for all inodes instead of
94 allocates enough memory to hold all the inodes in
95 a given cylinder group it may use a large amount
96 of memory for large disks with few cylinder groups.
104 utility appeared in SunOS 3.x.
113 version first appeared in
116 .An Todd C. Miller Aq Todd.Miller@courtesan.com