# Rename pictures based on information found in exif headers
emulate -L zsh

if [[ $# -lt 1 ]] ; then
    echo 'Usage: jpgrename $FILES' >& 2
    return 1
else
    echo -n 'Checking for jhead with version newer than 1.9: '
    jhead_version=`jhead -h | \
                   grep 'used by most Digital Cameras.  v.*' | \
                   awk '{print $6}' | tr -d v`
    if [[ $jhead_version > '1.9' ]]; then
        echo 'success - now running jhead.'
        jhead -n%Y-%m-%d_%Hh%M_%f $*
    else
        echo 'failed - exiting.'
    fi
fi