.Sh SYNOPSIS
.Nm
.Op Fl DxZ
-.Op Fl B Ar byte-order
+.Op Fl B Ar endian
.Op Fl b Ar free-blocks
.Op Fl d Ar debug-mask
-.Op Fl F Ar specfile
+.Op Fl F Ar mtree-specfile
.Op Fl f Ar free-files
.Op Fl M Ar minimum-size
.Op Fl m Ar maximum-size
.Ar directory
or from the mtree manifest
.Ar manifest .
-If optional directory tree
+If any optional directory trees are passed in the
.Ar extra-directory
-is passed, then the directory tree of each argument will be merged
+arguments, then the directory tree of each argument will be merged
into the
.Ar directory
or
.Pp
The options are as follows:
.Bl -tag -width flag
-.It Fl B Ar byte-order
+.It Fl B Ar endian
Set the byte order of the image to
-.Ar byte-order .
+.Ar endian .
Valid byte orders are
.Ql 4321 ,
.Ql big ,
set in
.Ar debug-mask .
XXX: document these
-.It Fl F Ar specfile
+.It Fl F Ar mtree-specfile
Use
-.Ar specfile
+.Ar mtree-specfile
as an
.Xr mtree 8
.Sq specfile
.Ar maximum-size .
An error will be raised if the target file system needs to be larger
than this to accommodate the provided directory tree.
-.It Fl N Ar dbdir
+.It Fl N Ar userdb-dir
Use the user database text file
.Pa master.passwd
and group database text file
.Pa group
from
-.Ar dbdir ,
+.Ar userdb-dir ,
rather than using the results from the system's
.Xr getpwnam 3
and
.It Fl x
Exclude file system nodes not explicitly listed in the specfile.
.It Fl Z
-Create the image as a sparse file.
+Create a sparse file for
+.Sy ffs .
+This is useful for virtual machine images.
.El
.Pp
Where sizes are specified, a decimal number of bytes is expected.
.It Sy hard-disk-boot
Boot image is a hard disk image.
.It Sy keep-bad-images
-Do not throw away images whose write was aborted due to an error.
+Don't throw away images whose write was aborted due to an error.
For debugging purposes.
.It Sy label
Label name of the image.
utility appeared in
.Nx 1.6 .
.Sh AUTHORS
-.An Luke Mewburn Aq Mt lukem@NetBSD.org
-(original program)
-.An Daniel Watt
-.An Walter Deignan
-.An Ryan Gabrys
-.An Alan Perez-Rathke
+.An Luke Mewburn
+.Aq lukem@NetBSD.org
+(original program),
+.An Daniel Watt ,
+.An Walter Deignan ,
+.An Ryan Gabrys ,
+.An Alan Perez-Rathke ,
.An Ram Vedam
(cd9660 support)