rump_msdos(8) - NetBSD Manual Pages

Command: Section: Arch: Collection:  
RUMP_MSDOS(8)           NetBSD System Manager's Manual           RUMP_MSDOS(8)


NAME
rump_msdos -- mount the msdos file system using a userspace server
SYNOPSIS
file-system PUFFS pseudo-device putter rump_msdos [options] special node
DESCRIPTION
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 sup- port 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 difference to using in-kernel code. In case mounting a file system image from a regular file, rump_msdos 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_msdos instead of mount_msdos(8). Corrupt file system images com- monly 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 run instead of mount_msdos(8) if ``rump'' is added to the options field of fstab(5). Please see mount_msdos(8) for a full description of the available command line options.
SEE ALSO
p2k(3), puffs(3), rump(3), mount_msdos(8)
HISTORY
The rump_msdos utility first appeared in NetBSD 5.0. It is currently considered experimental. NetBSD 5.0 February 15, 2009 NetBSD 5.0
Powered by man-cgi 1.15, Panagiotis Christias
Modified for NetBSD by Kimmo Suominen