Added sysctl examples (read-only sysctls for now)

sbin/mount_portal/examples/advanced.1

@@ -86,3 +86,25 @@ NoticeNoSlashHere
 # Or, rather than putting //, we can use the last nroff
 # configuration, nroff%, instead:
 % cat /p/nroff%/p/bzcat%/usr/share/man/man8/mount_portal.bz2
+
+# Also, we can provide read-only 'sysctlfs' functionality.  This
+# is provided by the shell script sysctlfs.sh, which should be in
+# /usr/share/examples/mount_portal.
+
+% cat /p/sysctl/kern.mbuf
+msize = 128
+mclbytes = 2048
+nmbclusters = 512
+mblowat = 16
+mcllowat = 8
+
+% cat /p/sysctl/kern/mbuf
+msize = 128
+mclbytes = 2048
+nmbclusters = 512
+mblowat = 16
+mcllowat = 8
+
+% cat /p/sysctl/kern/mbuf/msize
+128
+

sbin/mount_portal/examples/advanced.1.conf

@@ -16,3 +16,4 @@ bzcat/          rfilter bzcat/  bzcat %s
 bzcat%          rfilter bzcat%  bzcat %s
 nroff/          rfilter nroff/  nroff -man %s
 nroff%          rfilter nroff%  nroff -man %s
+sysctl/		rfilter	sysctl/	/usr/share/examples/mount_portal/sysctlfs.sh %s

sbin/mount_portal/examples/sysctlfs.sh

@@ -0,0 +1,15 @@
+#!/bin/sh
+## $NetBSD: sysctlfs.sh,v 1.1 2000/01/17 07:22:45 bgrayson Exp $
+##  Fast hack at a sysctl filesystem.  The path can be either in
+##  dot-style (kern.mbuf.msize) or in slash-style (kern/mbuf/msize).
+##  Hacked as an example by Brian Grayson (bgrayson@netbsd.org) in Sep 1999.
+for path in $*; do
+  ##  First, change any slashes into dots.
+  path=`echo $path | tr '/' '.'`
+  ##  Now invoke sysctl, and post-process the output to make it
+  ##  friendlier.  In particular:
+  ##    1.  Remove the leading prefix.
+  ##    2.  Remove a now-leading ".", if any.
+  ##    3.  If we are left with " = <val>", strip out the " = " also.
+  sysctl $path | sed -e "s/$path//;s/^\.//;s/^ = //"
+done