Shell Programming and Scripting

Code:

ok=0
while getopts lucky opt
do
  case $opt in
    l|u|c|k|y) echo "You gave the -$opt option"; ok=1 ;;
  esac
done
shift $(( $OPTIND - 1 ))

if [ $ok -eq 0 ]
then
    echo "You didn't enter a valid option"
fi

It already is in a potitional parameter: $3

After processing the options, it will be in $1.

Code:

opts=IV ## Put the option letters you want to use in $opts
ok=0
while getopts "$opts" opt
do
  case $opt in
    I) echo option I; ok=$(( ok + 1 )) ;;
    V) echo option V; ok=$(( ok + 1 )) ;;
  esac
done
shift $(( $OPTIND - 1 )) ## remove options; /home will now be $1

if [ $ok -eq 0 ]
then
   echo You did not give any options >&2
   exit 1
else
   echo You entered $ok options
fi

if [ $# -gt 0 ]
then
   echo "The remaining arguments are:"
   printf "  %s\n" "$@"
else
   echo "There are no arguments"
fi