#!/bin/bash
if [ -z $(which jhead) ] ; then
        echo jhead missing.
        exit 1
fi

if [ -z $(which exifautotran) ] ; then
        echo exifautotran missing.
        exit 1
fi

if [ -z "$1" ] ; then
  LTR=C
  LTR2=M
else
  LTR=$1
  LTR2=$1
fi

files=""
for f in $(find . -name 'img_*.jpg') ; do
  n="${f/img_/$LTR}"
  mv -v "$f" "$n"
  files="$files $n"
done

for f in $(find . -name 'dsc_*.jpg') ; do
  n="${f/dsc_/$LTR}"
  mv -v "$f" "$n"
  files="$files $n"
done

for f in $(find . -name 'p*.jpg') ; do
  n="${f/p???/$LTR2}"
  mv -v "$f" "$n"
  files="$files $n"
done

if [ "$files" ] ; then
  exifautotran $files
  jhead -n%Y%m%d%f $files
fi