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

12 votes216 views1 answer
Linux check used space in folder
Shell/Bash
18 votes243 views6 answers
Git stash file
Shell/Bash
25 votes204 views6 answers
Laravel rollback last migration
Shell/Bash
1 vote213 views2 answers
Uninstall opera ubuntu
Shell/Bash
1 vote216 views1 answer
Download nextcloud
Shell/Bash
0 vote245 views1 answer
Grep ignore repeated lines
Shell/Bash
0 vote215 views1 answer
Symfony install doctrine
Shell/Bash
0 vote230 views1 answer
Git create master branch in empty repository
Shell/Bash
3 votes209 views1 answer
Installation of package ‘openssl’ had non-zero exit status
Shell/Bash
8 votes227 views2 answers
Brave install ubuntu
Shell/Bash