Bash to fix file permissions in a Debian-like machine (specifically Ubuntu)

fixpermissions.sh

#!/bin/bash

ARCHIVE_DIR=/var/cache/apt/archives/
PACKAGES=`ls $ARCHIVE_DIR`
cd /

function changePerms()
{
  echo ""
  CHOWN="/bin/chown"
  CHMOD="/bin/chmod"
  PERMS=$1
  OWN=`echo $2 | /usr/bin/tr '/' ':'`
  PATHNAME=$3

  #echo "Changing permissions for $PATHNAME"

  echo -e "$CHOWN $OWN $PATHNAME"
  #`$CHOWN $OWN $PATHNAME`
  #`$CHMOD $MODE $PATHNAME`
}

for PACKAGE in $PACKAGES;
do
    echo -e "Getting information for $PACKAGE\n"
    FILES=`/usr/bin/dpkg -c "${ARCHIVE_DIR}${PACKAGE}"`

    for FILE in "$FILES";
    do
        FILE_DETAILS=`echo "$FILE" | awk '{print $1"\t"$2"\t"$6}'`

        FILE_DETAILS=`echo "$FILE_DETAILS" | tr '\t' '|'`

        for DT in $FILE_DETAILS
        do
          DT=`echo "$DT" | tr '|' '\t'`
          changePerms $DT
        done
    done
done