#!/bin/bash

me=$(whoami)

usage () {
    s=${0##*/}
    cat << EOF
$s: go back in time to fix typos and other minutiae in blog entries
Usage:
        $s path/to/entry.txt
        $s [-h|--help]

    -h, --help
        Output this usage guide.
EOF
    exit 1
}

if [ $# -ne 1 ]; then
    usage
fi

ENTRY=$1
TMP=`mktemp /tmp/$me.XXXXXXXX`||exit 1

cp $ENTRY $TMP
vim $TMP
chmod --reference $ENTRY $TMP
touch -r $ENTRY $TMP
mv $TMP $ENTRY