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RUMP_MSDOS(8)               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 discouraged, 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.

NetBSD 10.99                   November 21, 2010                  NetBSD 10.99