#!/bin/sh

# IsScript.sh
# Thu Jul  9 16:22:24 PDT 2009
# Chieh Cheng
# http://www.CynosureX.com/

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

  scriptName=`basename "$0"`

function performAction ()
{
  file="$1"
  firstLine=`grep -v '^$' "${file}" | head -1`
  firstTwoCharacters=`SubStr.sh "${firstLine}" 0 2`
  result=0

  if [ "${firstTwoCharacters}" = "#!" ]
  then
    result=1
  else
    result=0
  fi

  echo "${result}"
}

function usage ()
{
  echo "  Usage:   ${scriptName} \"file\""
}

  if [ $# -eq 1 ]
  then
    file="$1"

    if [ -f "${file}" ]
    then
      result=`performAction "${file}"`
      echo "${result}"
    else
      echo "${file} not found!"
    fi
  else
    usage
  fi