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Fix tyop pointed out by Simon Burge. Also expand description 

a little, and change words to suggest overlay is a starting point for
layers which need to overlay the over-mounted fs.
This commit is contained in:
wrstuden 2000-01-20 23:59:46 +00:00
parent 0dded5f65c
commit 01dd896ae9
1 changed files with 6 additions and 4 deletions
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10
sbin/mount_overlay/mount_overlay.8
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@ -1,4 +1,4 @@
.\" $NetBSD: mount_overlay.8,v 1.1 2000/01/20 19:22:10 wrstuden Exp $
.\" $NetBSD: mount_overlay.8,v 1.2 2000/01/20 23:59:46 wrstuden Exp $
.\"
.\" Copyright (c) 1992, 1993, 1994
.\" The Regents of the University of California. All rights reserved.
@ -68,11 +68,13 @@ filesystem does not replicate the sub-tree, it places itself between
the sub-tree and all future access.
.Pp
The overlay layer has two purposes.
First, it serves as a demonstration of layering by proving a layer
which does nothing.
First, it serves as a demonstration of layering by providing a layer
which does nothing other than insert itself over the over-mounted
file system.
Second, the overlay 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
new file system layers which need to block access to the overlayed
file system can be created very easily be starting
with an overlay layer.
.Pp
The internal operation of the overlay layer is identical to that of the