Linux openconnect shell script

opc_vpn.sh

#!/bin/bash
# openconnect shell script

# vpn settings
HOST="test-vpn.com"
USER="test"
PASSWORD="test"

case "$1" in
    --help)
        echo "usage: script [--help] [--open] [--close] [--check]"
        echo "arguments:"
        echo "  --help           show this help message and exit"
        echo "  --open           start openconnect in a background"
        echo "  --close          kill openconnect process"
        echo "  --check          check openconnect process"
        ;;
    --open)
        # use `openconnect -h` for more options
        echo $PASSWORD | sudo openconnect -b -u $USER $HOST --no-dtls --passwd-on-stdin
        ;;
    --close)
        sudo pkill -2 openconnect
        ;;
    --check)
        ps -ef | grep openconnect
        ;;
    *)
        echo "use [--help] for help"
        exit 1
        ;;
esac