#!/bin/sh

# RemoveFromList.sh
# 2007-02-29
# Chieh Cheng
# http://www.CynosureX.com/

# Removes a list of items in a file from
# another list of items in another file.

# GNU General Public License (GPL), Version 2, June 1991

scriptName=`echo $0 | sed s/\\\\/.*\\\\///g`

if [ $# -ne 2 ]
then
  echo "  Usage:   ${scriptName} \"Remove List File\" \"Main List File\""
  exit
fi

removeList="$1"
mainList="$2"

if [ -f "${removeList}" -a -f "${mainList}" ]
then
  tempFile=`GetTempPathName.ksh "${scriptName}"`

  cp "${removeList}" "${tempFile}"
  cat "${removeList}" >> "${tempFile}"
  cat "${mainList}" >> "${tempFile}"

  cat "${tempFile}" | sort | uniq -u > "${mainList}"

  rm "${tempFile}"
else
  echo "${scriptName}: ${removeList} and/or ${mainList} do not exist!"
fi