refactored the cmdline argument processing I replaced the nested switch statements with one single large else-if construct. Instead of char comparision now str(n)cmp(3) is used. Although this is slower it is much more readable and covers corner-cases which were uncovered before (e.g. -bdxxx). As always: Readability and simplicity matter, not performance.

#!/bin/sh
#
# update the date and version of man pages

if [ $# -lt 2 ] ; then
	echo "usage: update-manpage-header VERSION FILES..." >&2
	exit 1
fi


date=`date +%Y-%m-%d`

version="$1"
shift

for i do
	ed -s "$i" <<!
/^\.TH/s#[0-9]\{4\}-[0-9]\{2\}-[0-9]\{2\}#$date#
s#[0-9]\{1,\}\.[0-9]\{1,\}\.[0-9]\{1,\}#$version#
p
w
q
!
done