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clean up (GRAMMAR POLICE!), removed references to now-nonexistent

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loopback file system (fixes pr 955, but more thoroughly).
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cgd 1995-07-12 07:08:27 +00:00
parent 3f9f3ddd4e
commit 7e0beb510f
1 changed files with 5 additions and 12 deletions
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17
sbin/mount_null/mount_null.8
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@ -1,4 +1,4 @@
.\" $NetBSD: mount_null.8,v 1.2 1995/03/18 14:57:46 cgd Exp $
.\" $NetBSD: mount_null.8,v 1.3 1995/07/12 07:08:27 cgd Exp $
.\"
.\" Copyright (c) 1992, 1993, 1994
.\" The Regents of the University of California. All rights reserved.
@ -53,17 +53,12 @@ The
command creates a
null layer, duplicating a sub-tree of the file system
name space under another part of the global file system namespace.
In this respect, it is
similar to the loopback file system (see
.Xr mount_lofs 8 ) .
It differs from
the loopback file system in two respects: it is implemented using
a stackable layers techniques, and it's
It is implemented using a stackable layers technique, and its
.Do
null-node
.Dc s
null-nodes
.Dc
stack above
all lower-layer vnodes, not just over directory vnodes.
all lower-layer vnodes (not just above directory vnodes).
.Pp
The options are as follows:
.Bl -tag -width indent
@ -79,8 +74,6 @@ man page for possible options and their meanings.
The null layer has two purposes.
First, it serves as a demonstration of layering by proving a layer
which does nothing.
(It actually does everything the loopback file system does,
which is slightly more than nothing.)
Second, the null layer can serve as a prototype layer.
Since it provides all necessary layer framework,
new file system layers can be created very easily be starting