| RUMP_MSDOS(8) | System Manager's Manual | RUMP_MSDOS(8) |
rump_msdos —
file-system PUFFS
pseudo-device putter
rump_msdos |
[options] image mountpoint |
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).
rump_msdos utility first appeared in
NetBSD 5.0.
| November 21, 2010 | NetBSD 8.99 |