#!/bin/sh
while [ -n "$1" ]
do
  case "$1" in
    -abc)
      echo "Option -abc"
      ;;
    -xyz)
      file="$2"
      echo "Option -xyz file=${file}"
      shift
      ;;
    *|--)
      break
      ;;
  esac
  shift
done
echo "file=${file}"
echo "args: $*"