Bash argument parsing

cat >/tmp/demo-space-separated.sh <<'EOF'
#!/bin/bash

POSITIONAL=()
while [[ $# -gt 0 ]]
do
key="$1"

case $key in
    -e|--extension)
    EXTENSION="$2"
    shift # past argument
    shift # past value
    ;;
    -s|--searchpath)
    SEARCHPATH="$2"
    shift # past argument
    shift # past value
    ;;
    -l|--lib)
    LIBPATH="$2"
    shift # past argument
    shift # past value
    ;;
    --default)
    DEFAULT=YES
    shift # past argument
    ;;
    *)    # unknown option
    POSITIONAL+=("$1") # save it in an array for later
    shift # past argument
    ;;
esac
done
set -- "${POSITIONAL[@]}" # restore positional parameters

echo "FILE EXTENSION  = ${EXTENSION}"
echo "SEARCH PATH     = ${SEARCHPATH}"
echo "LIBRARY PATH    = ${LIBPATH}"
echo "DEFAULT         = ${DEFAULT}"
echo "Number files in SEARCH PATH with EXTENSION:" $(ls -1 "${SEARCHPATH}"/*."${EXTENSION}" | wc -l)
if [[ -n $1 ]]; then
    echo "Last line of file specified as non-opt/last argument:"
    tail -1 "$1"
fi
EOF

chmod +x /tmp/demo-space-separated.sh

/tmp/demo-space-separated.sh -e conf -s /etc -l /usr/lib /etc/hosts

Source: stackoverflow.com

Similar codes

0 vote218 views1 answer
Install razer synapse ubuntu
Shell/Bash
0 vote206 views1 answer
Linux lagging a lot overheating
Shell/Bash
0 vote247 views1 answer
"https://restful-booker.herokuapp.com/booking
Shell/Bash
3 votes189 views2 answers
React native pm ERR! code EINTEGRITY
Shell/Bash
2 votes148 views1 answer
Linux see rights on folder
Shell/Bash
0 vote177 views1 answer
Bash get package dependencies
Shell/Bash
0 vote208 views2 answers
Install code . path in mac
Shell/Bash
0 vote191 views1 answer
Printing arguments in a script
Shell/Bash
4 votes192 views3 answers
Bash colors
Shell/Bash
69 votes210 views6 answers
Ubuntu kill running port
Shell/Bash