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.Dd November 21, 2010 .Dt RUMP_UDF 8 .Os .Sh NAME .Nm rump_udf .Nd mount a udf image with a userspace server .Sh SYNOPSIS .Cd "file-system PUFFS" .Cd "pseudo-device putter"
p .Nm .Op options .Ar image .Ar mountpoint .Sh DESCRIPTION .Em NOTE! This manual page describes features specific to the .Xr rump 3 file server. Please see .Xr mount_udf 8 for a full description of the available command line options.
p The .Nm utility can be used to mount udf file systems. It uses .Xr rump 3 and .Xr p2k 3 to facilitate running the file system as a server in userspace. As opposed to .Xr mount_udf 8 , .Nm does not use file system code within the kernel and therefore does not require kernel support except .Xr puffs 4 . Apart from a minor speed penalty there is no downside with respect to in-kernel code.
p .Nm does not require using .Xr vnconfig 8 for mounts from regular files and the file path can be passed directly as the .Ar image parameter. In fact, the use of .Xr vnconfig 8 is discouraged, since it is unable to properly deal with images on sparse files.
p In case the image contains multiple partitions, the desired partition must be indicated by appending the token .Dq %DISKLABEL:p% to the .Ar image path. The letter .Dq p specifies the partition as obtained via .Xr disklabel 8 . For example, to mount partition .Dq e from image
a /tmp/wd0.img , use .Dq /tmp/wd0.img%DISKLABEL:e% .
p It is recommended that untrusted file system images be mounted with .Nm instead of .Xr mount_udf 8 . Corrupt file system images commonly cause the file system to crash the entire kernel, but with .Nm only the userspace server process will dump core.
p To use .Nm via .Xr mount 8 , the flags .Fl o Ar rump and .Fl t Ar udf should be given. Similarly, .Nm is used instead of .Xr mount_udf 8 if .Dq rump is added to the options field of .Xr fstab 5 . .Sh SEE ALSO .Xr p2k 3 , .Xr puffs 3 , .Xr rump 3 , .Xr mount_udf 8 .Sh HISTORY The .Nm utility first appeared in .Nx 5.0 .