puffs/rump_msdos/rump_msdos.8

 $NetBSD: rump_msdos.8,v 1.13 2011/07/24 09:00:07 uch Exp $

 WARNING: GENERATED FILE, DO NOT EDIT
 INSTEAD, EDIT makerumpmanpages.sh AND REGEN
 from: NetBSD: makerumpmanpages.sh,v 1.12 2010/11/22 07:56:31 pooka Exp

 Copyright (c) 2008-2010 Antti Kantee. All rights reserved.

 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 AUTHOR 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 AUTHOR 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 November 21, 2010
.Dt RUMP_MSDOS 8
.Os
.Sh NAME
.Nm rump_msdos
.Nd mount a msdos image with a userspace server
.Sh SYNOPSIS
.Cd "file-system PUFFS"
.Cd "pseudo-device putter"
p
.Nm
.Op options
.Ar image
.Ar mountpoint
.Sh DESCRIPTION
.Em NOTE!
This manual page describes features specific to the
.Xr rump 3
file server.
Please see
.Xr mount_msdos 8
for a full description of the available command line options.
p
The
.Nm
utility can be used to mount msdos file systems.
It uses
.Xr rump 3
and
.Xr p2k 3
to facilitate running the file system as a server in userspace.
As opposed to
.Xr mount_msdos 8 ,
.Nm
does not use file system code within the kernel and therefore does
not require kernel support except
.Xr puffs 4 .
Apart from a minor speed penalty there is no downside with respect to
in-kernel code.
p
.Nm
does not require using
.Xr vnconfig 8
for mounts from regular files and the file path can be passed
directly as the
.Ar image
parameter.
In fact, the use of
.Xr vnconfig 8
is discouraged, since it is unable to properly deal with images on
sparse files.
p
In case the image contains multiple partitions, the desired partition
must be indicated by appending the token
.Dq %DISKLABEL:p%
to the
.Ar image
path.
The letter
.Dq p
specifies the partition as obtained via
.Xr disklabel 8 .
For example, to mount partition
.Dq e
from image
a /tmp/wd0.img ,
use
.Dq /tmp/wd0.img%DISKLABEL:e% .
p
It is recommended that untrusted file system images be mounted with
.Nm
instead of
.Xr mount_msdos 8 .
Corrupt file system images commonly cause the file system
to crash the entire kernel, but with
.Nm
only the userspace server process will dump core.
p
To use
.Nm
via
.Xr mount 8 ,
the flags
.Fl o Ar rump
and
.Fl t Ar msdos
should be given.
Similarly,
.Nm
is used instead of
.Xr mount_msdos 8
if
.Dq rump
is added to the options field of
.Xr fstab 5 .
.Sh SEE ALSO
.Xr p2k 3 ,
.Xr puffs 3 ,
.Xr rump 3 ,
.Xr mount_msdos 8
.Sh HISTORY
The
.Nm
utility first appeared in
.Nx 5.0 .