RUMP_UDF(8)             NetBSD System Manager's Manual             RUMP_UDF(8)

NAME
     rump_udf -- mount the udf file system using a userspace server

SYNOPSIS
     file-system PUFFS
     pseudo-device putter

     rump_udf [options] special node

DESCRIPTION
     The rump_udf utility can be used to mount udf file systems.  It uses
     rump(3) and p2k(3) to facilitate running the file system as a server in
     userspace.  As opposed to mount_udf(8), rump_udf 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 (starting from 10% and
     depending on the workload and file system in question), there is no dif-
     ference to using in-kernel code.

     In case mounting a file system image from a regular file, rump_udf does
     not require the use of vnconfig(8) unlike kernel file systems.  Instead,
     the image path can be directly passed as the special file path.  The
     exception is if the image contains a disklabel.  In this case vnconfig is
     required to resolve the start offset for the correct partition within the
     image.

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

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

     Please see mount_udf(8) for a full description of the available command
     line options.

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

HISTORY
     The rump_udf utility first appeared in NetBSD 5.0.  It is currently con-
     sidered experimental.

NetBSD 5.0.1                   February 15, 2009                  NetBSD 5.0.1

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