#!/bin/sh

# TimeStampOutput.sh
# Fri Jun 19 17:47:56 PDT 2009
# Chieh Cheng
# http://www.CynosureX.com/

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

  scriptName=`basename "$0"`

usage ()
{
  echo " Usage:  ${scriptName} [ \"prefix\" ] [ \"suffix\" ]"
}

  if [ $# -eq 0 ] || [ $# -eq 2 ]
  then
    prefix=""
    suffix=""

    if [ $# -eq 2 ]
    then
      prefix="$1"
      suffix="$2"
    fi

    previous=""

    while read line
    do
      timeStamp=`date`
      if [ "${timeStamp}" != "${previous}" ]
      then
        echo "${prefix}${timeStamp}${suffix}"
      fi
      echo "${line}"
      previous="${timeStamp}"
    done
  else
    usage
  fi