parser.sh

#!/bin/bash

function help
{
  echo "Usage: options (-f value) (-m value) (-s value) -h for help"
}

function sorting
{

case $1 in
  1) cat $2 | sort -k1
  ;;
  2) cat $2 | sort -k2
  ;;
  3) cat $2 | sort -k3
  ;;
  4) cat $2
  ;;
  5)cat $2 | sort -k5
  ;;
  6)cat $2 | sort -t'"' -k3 -n
  ;;
  7)cat $2 | sort -k10 -n
  ;;
  8)cat $2 | sort -t'"' -k5
  ;;
  9)cat $2 | sort -t'"' -k6
  ;;
esac

}

if ( ! getopts ":f:m:s:h" opt); then
    echo "Usage: `basename $0` options (-f value) (-m value) (-s value) -h for help";
    exit $E_OPTERROR;
fi

while getopts ":f:m:s:h" opt; do
  case $opt in
    h)
      echo "-h was triggered!" >&2
    help
      ;;
    f)
      echo "-f was triggered, Parameter: $OPTARG" >&2
      FILE=$OPTARG
      ;;
    :)
      echo "Option -$OPTARG requires an argument." >&2
      exit 1
      ;;
    m)
      echo "-m was triggered, Parameter: $OPTARG" >&2
    FILTER=$OPTARG
    grep "$OPTARG" $FILE

      ;;
    :)
      echo "Option -$OPTARG requires an argument." >&2
      exit 1
      ;;
    s)
      echo "-s was triggered, Parameter: $OPTARG" >&2
    sorting $OPTARG $FILE | grep $FILTER
      ;;
    :)
      echo "Option -$OPTARG requires an argument." >&2
      exit 1
      ;;
    \?)
      echo "Invalid option: -$OPTARG" >&2
      exit 1
      ;;
  esac
done