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NetBSD 6.1.5 - man page for rump_lfs (netbsd section 8)

RUMP_LFS(8)			   BSD System Manager's Manual			      RUMP_LFS(8)

NAME
     rump_lfs -- mount a lfs image with a userspace server

SYNOPSIS
     file-system PUFFS
     pseudo-device putter

     rump_lfs [options] image mountpoint

DESCRIPTION
     NOTE! This manual page describes features specific to the rump(3) file server.  Please see
     mount_lfs(8) for a full description of the available command line options.

     The rump_lfs utility can be used to mount lfs file systems.  It uses rump(3) and p2k(3) to
     facilitate running the file system as a server in userspace.  As opposed to mount_lfs(8),
     rump_lfs does not use file system code within the kernel and therefore does not require ker-
     nel support except puffs(4).  Apart from a minor speed penalty there is no downside with
     respect to in-kernel code.

     rump_lfs does not require using vnconfig(8) for mounts from regular files and the file path
     can be passed directly as the image parameter.  In fact, the use of vnconfig(8) is discour-
     aged, since it is unable to properly deal with images on sparse files.

     In case the image contains multiple partitions, the desired partition must be indicated by
     appending the token ``%DISKLABEL:p%'' to the image path.  The letter ``p'' specifies the
     partition as obtained via disklabel(8).  For example, to mount partition ``e'' from image
     /tmp/wd0.img, use ``/tmp/wd0.img%DISKLABEL:e%''.

     It is recommended that untrusted file system images be mounted with rump_lfs instead of
     mount_lfs(8).  Corrupt file system images commonly cause the file system to crash the entire
     kernel, but with rump_lfs only the userspace server process will dump core.

     To use rump_lfs via mount(8), the flags -o rump and -t lfs should be given.  Similarly,
     rump_lfs is used instead of mount_lfs(8) if ``rump'' is added to the options field of
     fstab(5).

SEE ALSO
     p2k(3), puffs(3), rump(3), mount_lfs(8)

HISTORY
     The rump_lfs utility first appeared in NetBSD 5.0.

BSD					November 21, 2010				      BSD


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