add script to help figure out what man pages need MLINKS updated...

tools/tools/README

@@ -44,6 +44,7 @@ kernelcruft	Shellscript to find orphaned *.c files in /sys
 kerninclude	Shellscript to find unused #includes in the kernel.
 kernxref	Shellscript to cross reference symbols in the LINT kernel.
 kttcp		An in-kernel version of the ttcp network performance tool
+man		Scripts useful for working on man pages.
 mctest		A multicast test program
 mid	 	Create a Message-ID database for mailing lists.
 mwl		Tools specific to the Marvell 88W8363 support

tools/tools/man/README

@@ -0,0 +1,23 @@
+man scripts
+===========
+
+checkmlinks.sh
+--------------
+
+This is a simple script used to check if a man page's Nm/Fo/Fn macro
+names are in the Makefile.
+
+To run, switch to the directory with the pages in it and run the script:
+```
+cd /usr/src/share/man/man9
+sh /usr/src/tools/tools/man/checkmlinks.sh
+```
+
+The script will output the name that is missing, and the file that it
+was sourced from.
+
+There are a number of exceptions, and those should be added to the
+script to skip over, e.g. `SDT_PROBE`.  The last one is added because
+adding the numbered args is a bit redundant.
+
+$FreeBSD$

tools/tools/man/checkmlinks.sh

@@ -0,0 +1,35 @@
+#!/bin/sh -
+# Copyright 2020 John-Mark Gurney.
+# 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.
+#
+# THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``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 OR CONTRIBUTORS 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.
+#
+#	$FreeBSD$
+#
+
+for i in *.[0-9]*; do
+	for j in $(awk '($1 == ".Nm" || $1 == ".Fo" || $1 == ".Fn") && $2 != "" && $2 != "." && $2 != "," { print $2 }' "$i" | egrep -v 'SDT_PROBE|_Static_assert|ffs_vget|atomic_'); do
+		if ! grep "$j" Makefile >/dev/null; then
+			echo missing "$j" from "$i"
+		fi
+	done | sort -u
+done