| RUMP_SYSVBFS(8) | System Manager's Manual | RUMP_SYSVBFS(8) | 
rump_sysvbfs —
file-system PUFFS
pseudo-device putter
| rump_sysvbfs | [options] image mountpoint | 
The rump_sysvbfs utility can be used to
    mount sysvbfs file systems. It uses
    rump(3) and
    p2k(3) to facilitate running the
    file system as a server in userspace. As opposed to
    mount_sysvbfs(8),
    rump_sysvbfs 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_sysvbfs 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_sysvbfs instead of
    mount_sysvbfs(8).
    Corrupt file system images commonly cause the file system to crash the
    entire kernel, but with rump_sysvbfs only the
    userspace server process will dump core.
To use rump_sysvbfs via
    mount(8), the flags
    -o rump and
    -t sysvbfs should be given.
    Similarly, rump_sysvbfs is used instead of
    mount_sysvbfs(8) if
    “rump” is added to the options field of
    fstab(5).
rump_sysvbfs utility first appeared in
  NetBSD 5.0.
| November 21, 2010 | NetBSD 10.1 |