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bash parse option

Gentle Grouse answered on October 19, 2022 Popularity 3/10 Helpfulness 2/10

answer bash parse option

bash parse option

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#!/bin/sh

arg0=$(basename "$0" .sh)
blnk=$(echo "$arg0" | sed 's/./ /g')

usage_info()
{
    echo "Usage: $arg0 [{-s|--source} source] [{-d|--destination} destination] \\"
    echo "       $blnk [{-c|--credentials} credentials] [{-b|--bandwidth} bandwidth] \\"
    echo "       $blnk [{-t|--timeout} timeout] [{-p|--port} port] \\"
    echo "       $blnk [-h|--help] [{-l|--compression-level} level]"
}

usage()
{
    exec 1>2   # Send standard output to standard error
    usage_info
    exit 1
}

error()
{
    echo "$arg0: $*" >&2
    exit 1
}

help()
{
    usage_info
    echo
    echo "  {-s|--source} source            -- Set source directory (default: .)"
    echo "  {-d|--destination} destination  -- Set destination"
    echo "  {-c|--credentials} credentials  -- Set credentials"
    echo "  {-b|--bandwidth} bandwidth      -- Set maximum bandwidth"
    echo "  {-t|--timeout} timeout          -- Set timeout (default: 60s)"
    echo "  {-p|--port} port                -- Set port number (default: 1234)"
    echo "  {-l|--compression-level} level  -- Set compression level (default: 1)"
    echo "  {-h|--help}                     -- Print this help message and exit"
#   echo "  {-V|--version}                  -- Print version information and exit"
    exit 0
}

flags()
{
    while test $# -gt 0
    do
        case "$1" in
        (-s|--source)
            shift
            [ $# = 0 ] && error "No source directory specified"
            export SOURCE="$1"
            shift;;
        (-d|--destination)
            shift
            [ $# = 0 ] && error "No destination specified"
            export DESTINATION="$1"
            shift;;
        (-c|--credentials)
            shift
            [ $# = 0 ] && error "No credentials specified"
            export CREDENTIALS="$1"
            shift;;
        (-b|--bandwidth)
            shift
            [ $# = 0 ] && error "No bandwidth specified"
            export BANDWIDTH="$1"
            shift;;
        (-t|--timeout)
            shift
            [ $# = 0 ] && error "No timeout specified"
            export TIMEOUT="$1"
            shift;;
        (-p|--port)
            shift
            [ $# = 0 ] && error "No port specified"
            export PORT="$1"
            shift;;
        (-l|--compression-level)
            shift
            [ $# = 0 ] && error "No compression level specified"
            export COMPRESS_LEVEL="$1"
            shift;;
        (-h|--help)
            help;;
#       (-V|--version)
#           version_info;;
        (*) usage;;
        esac
    done
}

flags "$@"

echo "source is $SOURCE"
echo "destination is $DESTINATION"
echo "credentials are $CREDENTIALS"
echo "bandwidth is $BANDWIDTH"
echo "timeout is $TIMEOUT"
echo "port is $PORT"

Popularity 3/10 Helpfulness 2/10 Language shell

Source: stackoverflow.com

Tags: bash shell

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Contributed on Oct 19 2022

Gentle Grouse

0 Answers Avg Quality 2/10

bash parse option

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