linux – 压缩Bash脚本来解析文件

$vi

function displayHelp
{
        echo "Use '-f' to set the file to be used "
        echo "Use '-s' to sort the data bya column"
        echo "Use '-m' to output the rows which match this expression"
}

function displayColumn
{
    columnnumber="$2"
    awk '{print $'$columnnumber'}' $1

}

function displayParameter
{   
    parameter="$3"
    columnnumber="$2"
    awk -v s=$3 -v c=$2 '$c ~ s { print $0 }' $1
}

while getopts f:s:m:h opt
do
  case "$opt" in
    h) displayHelp;;
    f) filepath="$OPTARG";;
    s) column="$OPTARG"  
    displayColumn $filepath $column
    ;;
    m) searchParam="$OPTARG"
    displayParameter $filepath $column $searchParam
    ;;

  esac
done