rump_sysvbfs [options] special node
In case mounting a file system image from a regular file, rump_sysvbfs 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_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 run instead of mount_sysvbfs(8) if ``rump'' is added to the options field of fstab(5).
Please see mount_sysvbfs(8) for a full description of the available command line options.