Listing 4 filter

#!/bin/ksh

#***************************************************
# Listing 4:
# filter
#
# Description:
#
# This script creates a filtered snapshot file.  This
# filtered file is used during a filtered compare.
#
# Author: John Spurgeon (john.p.spurgeon@intel.com)
#
#***************************************************

if [ -z "$ENTRAP" ]
then
   $(dirname $0)/entrap
   exit 0
fi

FILTER_DIR=$FILTER_ROOT/$CONFIG_NAME

while getopts f:h OPTION
do
   case "$OPTION"
   in
      f)   FILTER_DIR=$FILTER_ROOT/$OPTARG ;;
      h)   echo "$(basename $0) [-f filter_name] snapshot"
           exit 0 ;;
     \?)   exit 1 ;;
     esac
done

if [ "$OPTIND" -gt "$#" ]
then
   echo "[$(basename $0)] Error: Missing snapshot label!" >& 2
   exit 1
fi

shift $(($OPTIND - 1))
SNAPSHOT_NAME=$1
SNAPSHOT_DIR=$SNAPSHOT_ROOT/$SNAPSHOT_NAME

if ! [ -d $FILTER_DIR ]
then
   mkdir $FILTER_DIR
   if ! [ -d $FILTER_DIR ]
   then
      echo "[$(basename $0)] Error: Failed to create filter directory!" >& 2
      exit 1
   fi
fi

while read DIR FILE
do
   if ! [ -f $SNAPSHOT_DIR/$FILE ]
   then
      echo "[$(basename $0)] Warning: $SNAPSHOT_DIR/$FILE does not exist." >& 2
      continue
   fi
   if ! [ -f $FILTER_DIR/$FILE ]
   then
      touch $FILTER_DIR/$FILE
   fi
   cat $SNAPSHOT_DIR/$FILE | $FILTER $FILTER_DIR/$FILE > $SNAPSHOT_DIR/$FILE.f
done < $CONFIG_FILE


#!/bin/ksh