90 lines
2.8 KiB
Groff
90 lines
2.8 KiB
Groff
.\" $NetBSD: fsirand.8,v 1.10 2016/09/11 21:22:18 sevan Exp $
|
|
.\"
|
|
.\" Copyright (c) 1997 The NetBSD Foundation, Inc.
|
|
.\" All rights reserved.
|
|
.\"
|
|
.\" This code is derived from software contributed to The NetBSD Foundation
|
|
.\" by Christos Zoulas.
|
|
.\"
|
|
.\" 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 NETBSD FOUNDATION, INC. 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 FOUNDATION 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.
|
|
.\"
|
|
.Dd September 11, 2016
|
|
.Dt FSIRAND 8
|
|
.Os
|
|
.Sh NAME
|
|
.Nm fsirand
|
|
.Nd install random inode generation numbers in a filesystem
|
|
.Sh SYNOPSIS
|
|
.Nm
|
|
.Op Fl F
|
|
.Op Fl p
|
|
.Op Fl x Ar constant
|
|
.Ar special
|
|
.Sh DESCRIPTION
|
|
.Nm
|
|
writes random inode generation numbers for all the inodes on device
|
|
.Ar special .
|
|
These random numbers make the NFS filehandles less predictable, increasing
|
|
security of exported filesystems.
|
|
.Pp
|
|
.Nm
|
|
should be run on a clean and unmounted filesystem.
|
|
.Pp
|
|
The options are as follows:
|
|
.Bl -tag -width indent
|
|
.It Fl F
|
|
Indicates that
|
|
.Ar special
|
|
is a file system image, rather than a device name.
|
|
.Ar special
|
|
will be accessed
|
|
.Sq as-is ,
|
|
without requiring that it is a raw character device and without
|
|
attempting to read a disklabel.
|
|
.It Fl p
|
|
Print the current inode generation numbers; the filesystem is not modified.
|
|
.It Fl x Ar constant
|
|
Exclusive-or the given constant with the random number used in the generation
|
|
process.
|
|
.El
|
|
.Pp
|
|
.Nm
|
|
exits zero on success, non-zero on failure.
|
|
.Pp
|
|
If
|
|
.Nm
|
|
receives a
|
|
.Dv SIGINFO
|
|
signal, statistics on the amount of work completed and estimated
|
|
completion time (in minutes:seconds) will be written to the standard
|
|
error output.
|
|
.Sh SEE ALSO
|
|
.Xr fsck_ffs 8 ,
|
|
.Xr newfs 8
|
|
.Sh HISTORY
|
|
A
|
|
.Nm
|
|
utility appeared in
|
|
.Nx 1.3 .
|
|
.Sh AUTHORS
|
|
.An Christos Zoulas Aq Mt christos@NetBSD.org .
|