lukem: Determine filesystem level (ref: fsck_ffs(8) -c ...) and display it.

Code was derivied from observing how fsck_ffs `upgrades' to a given
level, and has been tested on recent NetBSD filesystems (reports as "3"),
SunOS ("1"), and ULTRIX ("0"). I haven't found a filesystem of level
"2" to test, but the code should detect it. Fixes [bin/1353]

1 files changed, 20 insertions, 11 deletions

diff --git a/sbin/dumpfs/dumpfs.8 b/sbin/dumpfs/dumpfs.8
index 78a275c9c64..8b856feb73e 100644
--- a/sbin/dumpfs/dumpfs.8
+++ b/sbin/dumpfs/dumpfs.8
@@ -1,5 +1,5 @@
-.\"	$OpenBSD: dumpfs.8,v 1.2 1996/06/23 14:30:15 deraadt Exp $
-.\"	$NetBSD: dumpfs.8,v 1.6 1995/03/18 14:55:14 cgd Exp $
+.\"	$OpenBSD: dumpfs.8,v 1.3 1997/05/31 08:32:29 deraadt Exp $
+.\"	$NetBSD: dumpfs.8,v 1.8 1997/05/07 23:19:03 lukem Exp $
 .\"
 .\" Copyright (c) 1983, 1991, 1993
 .\"	The Regents of the University of California.  All rights reserved.
@@ -41,23 +41,32 @@
 .Nm dumpfs
 .Nd dump file system information
 .Sh SYNOPSIS
-.Nm dumpfs
+.Nm
 .Op Ar filesys No \&| Ar device
 .Sh DESCRIPTION
-.Nm Dumpfs
+.Nm
 prints out the super block and cylinder group information
 for the file system or special device specified.
-The listing is very long and detailed.  This
-command is useful mostly for finding out certain file system
-information such as the file system block size and minimum
-free space percentage.
+The listing is very long and detailed.
+.Pp
+.Nm
+is useful mostly for finding out certain file system
+information such as the file system block size, minimum
+free space percentage, and the file system level that
+can be upgraded with the
+.Fl c
+option of 
+.Xr fsck_ffs 8 .
+All of this information can be found within the first twenty
+lines of the output.
 .Sh SEE ALSO
-.Xr fs 5 ,
 .Xr disktab 5 ,
+.Xr fs 5 ,
 .Xr disklabel 8 ,
-.Xr tunefs 8 ,
+.Xr fsck 8 ,
+.Xr fsck_ffs 8 ,
 .Xr newfs 8 ,
-.Xr fsck 8
+.Xr tunefs 8
 .Sh HISTORY
 The
 .Nm