lk/shell/options.md

title, tags, requires

title	tags	requires
Give shell script options	shell script	shell/scripts.md

Place this in a file called options.sh, and make it executable.

#!/bin/sh

echo "This script is called $0"

while getopts oe: choice ; do
    case "$choice" in
        o)
        echo "This is option number '${OPTIND}'."
        ;;
        e) echo "Option number '${OPTIND}' uses this variable: '${OPTARG}'."
        ;;
        \?) echo "That's not an option."
        exit 1
        ;;
    esac
done
shift "$(($OPTIND -1))"

echo "The standard arguments are: $@"

Try the options:

./options.sh -o
./options.sh -e elephant
./options.sh Some random words
./options.sh -efox Some other words

Try the script again, without the shift statement.

NB: You can change choice to any variable, but you must use OPTARG to show an option's argument and OPTIND to show the index of that argument.