- NetBSD Manual Pages
RUMP_CD9660(8) NetBSD System Manager's Manual RUMP_CD9660(8)
Powered by man-cgi (2021-06-01).
Maintained for NetBSD
by Kimmo Suominen.
Based on man-cgi by Panagiotis Christias.
rump_cd9660 -- mount a cd9660 image with a userspace server
rump_cd9660 [options] image mountpoint
NOTE! This manual page describes features specific to the rump(3) file
server. Please see mount_cd9660(8) for a full description of the avail-
able command line options.
The rump_cd9660 utility can be used to mount cd9660 file systems. It
uses rump(3) and p2k(3) to facilitate running the file system as a server
in userspace. As opposed to mount_cd9660(8), rump_cd9660 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_cd9660 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_cd9660 instead of mount_cd9660(8). Corrupt file system images com-
monly cause the file system to crash the entire kernel, but with
rump_cd9660 only the userspace server process will dump core.
To use rump_cd9660 via mount(8), the flags -o rump and -t cd9660 should
be given. Similarly, rump_cd9660 is used instead of mount_cd9660(8) if
``rump'' is added to the options field of fstab(5).
p2k(3), puffs(3), rump(3), mount_cd9660(8)
The rump_cd9660 utility first appeared in NetBSD 5.0.
NetBSD 9.3 November 21, 2010 NetBSD 9.3