Add a linecount shell function, and use it to count the lines in the

output from MAKEDEV.local.

Fixes PR 37498 from dlagner at rambler.ru, using an idea from David
Laight.  The while loop in the old code is executed in a subshell, so it
can't make persistent modifications to the parent shell's variables.

etc/MAKEDEV.tmpl

@@ -1,5 +1,5 @@
 #!/bin/sh -
-#	$NetBSD: MAKEDEV.tmpl,v 1.91 2007/11/20 18:58:46 pooka Exp $
+#	$NetBSD: MAKEDEV.tmpl,v 1.92 2007/12/08 17:31:12 apb Exp $
 #
 # Copyright (c) 2003,2007 The NetBSD Foundation, Inc.
 # All rights reserved.
@@ -346,6 +346,17 @@ hexprint()
 	echo "${hex:-0}"
 }
 
+# linecount multiline_string
+#	count the number of lines in the string
+#
+linecount()
+{
+	local IFS='
+' # just a newline, no other white space between the quotes
+	set -- $1
+	echo $#
+}
+
 setup()
 {
 	PATH=/sbin:/usr/sbin:/bin:/usr/bin:/rescue
@@ -1708,10 +1719,8 @@ local)
 	if [ -f "$0.local" ]; then
 		umask 0
 		if [ -n "$count_nodes" ]; then
-			sh "$0.local" $opts -s all | \
-			while read l; do
-				count_nodes=$((count_nodes + 1))
-			done
+			count_nodes=$((count_nodes + \
+			    $(linecount "$(sh "$0.local" $opts -s all)") ))
 		else
 			sh "$0.local" $opts all
 		fi