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

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

NAME
     rump_msdos -- mount a msdos image with a userspace server

SYNOPSIS
     file-system PUFFS
     pseudo-device putter

     rump_msdos [options] image mountpoint

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

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

     rump_msdos 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 dis-
     couraged, 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_msdos instead of
     mount_msdos(8).  Corrupt file system images commonly cause the file system to crash the
     entire kernel, but with rump_msdos only the userspace server process will dump core.

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

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

HISTORY
     The rump_msdos utility first appeared in NetBSD 5.0.

BSD					November 21, 2010				      BSD


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