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

     rump_hfs -- mount the hfs file system using a userspace server

     file-system PUFFS
     pseudo-device putter

     rump_hfs [options] special node

     The rump_hfs utility can be used to mount hfs file systems.  It uses
     rump(3) and p2k(3) to facilitate running the file system as a server in
     userspace.  As opposed to mount_hfs(8), rump_hfs 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_hfs 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

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

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

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

     p2k(3), puffs(3), rump(3), mount_hfs(8)

     The rump_hfs 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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