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Using getops with Bash

Getopts is an easy tool to process and check your command line arguments in a bash script. Far easier than trying to parse out the options yourself!

Example script:

#!/bin/bash
# Example script using getops
usage () {
cat << EOF
Example Script

usage: $0 options

        -h     Display this message
        -v     Patch Version
        -s     Remote server to patch

EOF
}

while getopts "hv:s:" OPTION
do
     case $OPTION in
         h)
             usage
             exit 1
             ;;
        v)
             VERSION=$OPTARG
             ;;
        s)
            HOST=$OPTARG
             ;;
        esac
done

if [[ ! -z $VERSION ]] && [[ ! -z $HOST ]]
then
        echo "You selected $VERSION to be applied to $HOST!"
else
        echo "You didn't tell me what to do."
        usage
        exit 1
fi

exit