Add vn(4) to document vn pseudo-devices.

Obtained from: NetBSD

2 files changed, 92 insertions, 2 deletions

diff --git a/share/man/man4/Makefile b/share/man/man4/Makefile
index eeb0e1c..c0d11ad 100644
--- a/share/man/man4/Makefile
+++ b/share/man/man4/Makefile
@@ -1,11 +1,11 @@
 #	@(#)Makefile	8.1 (Berkeley) 6/18/93
 
-MAN4=	bpf.4 ccd.4 cd.4 ch.4 ddb.4 divert.4 drum.4 fd.4 fpa.4 \
+MAN4=	bpf.4 ccd.4 cd.4 ch.4 ddb.4 divert.4 drum.4 fd.4 \
 	icmp.4 ifmib.4 inet.4 intro.4 ip.4 ipfirewall.4 \
 	lkm.4 lo.4 netintro.4 \
 	null.4 pt.4 pty.4 route.4 \
 	scsi.4 sd.4 snp.4 st.4 su.4 tcp.4 \
-	ttcp.4 termios.4 tty.4 udp.4 uk.4 update.4 unix.4 worm.4 yp.4 \
+	ttcp.4 termios.4 tty.4 udp.4 uk.4 update.4 unix.4 vn.4 worm.4 yp.4 \
 	zero.4
 
 MLINKS+=fd.4 stderr.4 fd.4 stdin.4 fd.4 stdout.4
diff --git a/share/man/man4/vn.4 b/share/man/man4/vn.4
new file mode 100644
index 0000000..a0dc0f2
--- /dev/null
+++ b/share/man/man4/vn.4
@@ -0,0 +1,90 @@
+.\"	$NetBSD: vnd.4,v 1.1 1995/12/30 18:10:48 thorpej Exp $
+.\"
+.\" Copyright (c) 1995 Jason R. Thorpe.
+.\" All rights reserved.
+.\"
+.\" Redistribution and use in source and binary forms, with or without
+.\" modification, are permitted provided that the following conditions
+.\" are met:
+.\" 1. Redistributions of source code must retain the above copyright
+.\"    notice, this list of conditions and the following disclaimer.
+.\" 2. Redistributions in binary form must reproduce the above copyright
+.\"    notice, this list of conditions and the following disclaimer in the
+.\"    documentation and/or other materials provided with the distribution.
+.\" 3. All advertising materials mentioning features or use of this software
+.\"    must display the following acknowledgement:
+.\"	This product includes software developed for the NetBSD Project
+.\"	by Jason R. Thorpe.
+.\" 4. Neither the name of the author nor the names of its contributors
+.\"    may be used to endorse or promote products derived from this software
+.\"    without specific prior written permission.
+.\"
+.\" THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
+.\" IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
+.\" OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
+.\" IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
+.\" INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
+.\" BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
+.\" LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
+.\" AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
+.\" OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+.\" SUCH DAMAGE.
+.\"
+.Dd December 30, 1995
+.Dt VN 4
+.Os
+.Sh NAME
+.Nm vn
+.Nd vnode disk driver
+.Sh SYNOPSIS
+.Cd "pseudo-device vn" Op Ar count
+.Sh DESCRIPTION
+The
+.Nm
+driver provides a disk-like interface to a file.  This is useful for
+a variety of applications, including swap files and building mini-root
+or floppy disk images.
+.Pp
+This document assumes that you're familiar with how to generate kernels,
+how to properly configure disks and pseudo-devices in a kernel
+configuration file.
+.Pp
+In order to compile in support for the
+.Nm vn ,
+you must add a line similar
+to the following to your kernel configuration file:
+.Bd -unfilled -offset indent
+pseudo-device	vn	4	#Vnode driver
+.Ed
+.Pp
+The
+.Ar count
+argument is how many
+.Nm vn Ns 's
+memory is allocated for a boot time.  In this example, no more than 4
+.Nm vn Ns 's
+may be configured.
+.Pp
+There is a run-time utility that is used for configuring
+.Nm vn Ns 's .
+See
+.Xr vnconfig 8
+for more information.
+.Sh BUGS
+The
+.Nm
+driver does not work if the file does not reside in a local filesystem.
+.Sh FILES
+/dev/{,r}vn* - vn device special files.
+.Pp
+.Sh HISTORY
+The vnode disk driver was originally written at the University of
+Utah.
+.Sh SEE ALSO
+.Xr MAKEDEV 8 ,
+.Xr config 8 ,
+.Xr fsck 8 ,
+.Xr mount 8 ,
+.Xr newfs 8 ,
+.Xr vnconfig 8 .