#!/bin/bash
#
# Make md5sums for /all/ the files in the archive.
# This way even if the archive as a whole is changed, or if various
# indices are added or removed, we can be sure of the content of
# each individual file.

# Print a dot after each NUM md5sums
NUM=50

if [ $# -ne 2 ]
then
  echo ""
  echo "Usage: $0 <directory> <outfile>"
  echo ""
  echo "directory: directory containing the Diebold memos"
  echo "outfile:   name of the file to save all the md5sums"
  echo ""
  exit
fi

MD5SUM=`which md5sum`
if [ "x$MD5SUM" == "x" ]
then
  echo "No md5sum program found"
fi

FIND=`which find`
if [ "x$FIND" == "x" ]
then
  echo "No find program found"
fi

SORT=`which sort`
if [ "x$SORT" == "x" ]
then
  echo "No sort program found"
fi

if [ ! -d $1 ]
then
  echo "No such archive directory: $1"
  exit
fi

if [ -f $2 ]
then
  echo "Backing up old copy of $2."
  mv $2 ${2}.bak
fi

echo "Starting md5sums.  Will store in $2.  This may take a while."
echo "Each '.' represents $NUM md5sums."
c=0
for f in `$FIND $1 | $SORT `
do
  if [ -f $f ]
  then
    $MD5SUM $f >> $2
    c=$((c+1))
    r=$((c%${NUM}))
    if [ $c -gt 0 -a $r -eq 0 ]
    then
      echo -n "."
    fi
  fi
done
echo ""
echo "Done."