#!/bin/bash

for f in $@; do
	#stem=`echo $f | sed 's/\(.*\.old\.\).*/\1/'`
	#tmus=`echo $f | sed 's/\(.*\.old\.\)\(\d*\)/\2/'`
	if [[ $f =~ (.*\.old\.)([0-9]+)$ ]]; then
		stem=${BASH_REMATCH[1]}
		ustm=${BASH_REMATCH[2]}
		sstm=`date -d @$(($ustm/1000000)) +%Y.%m.%d-%H.%M.%S`
		usus=`printf %06d $(($ustm%1000000))`
		mv $f $stem$sstm.$usus
	else
		echo skip rename file: $f
	fi
done