Fix timestamps for JPGs ending in UNIX timestamp

redate.bash

#!/bin/bash

shopt -s nullglob
for f in *.jpg
do
    # echo "fixing $f"
    timestamp=`echo $f | perl -ne 'm/.*_?\d{4}-\d{2}-\d{2}_(\d+)\.jpg/; print $1'`

    if [ $timestamp ]
        then
        touch_fmt=`date -r $timestamp +%Y%m%d%H%M.%S`
        touch -t $touch_fmt $f
    fi
done