wifictl

#!/usr/bin/env bash
# This is a shell script to control Wi-Fi radio power
# Written and tested on Fedora 28 and macOS 10.12.6

# Assign help text to variable for user later
HELP="Usage: wifictl [ on | off | toggle | status ]"

# Ensure that only a single parameter was passed
# Display help text if more than 1 parameter was supplied
if [ "$#" -ne 1 ]; then
    echo "Error: Incorrect number of parameters; please supply only a valid path"
    echo $HELP
    exit 1
fi

# If the user supplied "--help", then provide help text
if [ "$1" = "--help" ]; then
    echo $HELP
    echo
    exit 0
fi

# Determine OS type and set OS-specific values
case "$OSTYPE" in
    darwin*)
        # Set the base command for interacting with network configuration
        BASECMD="/usr/sbin/networksetup"
        # Determine which interface is the Wi-Fi interface
        IFACE=$($BASECMD -listallhardwareports | grep -A1 'Wi-Fi' | awk '/Device/ {print $2}')
        # Get the current Wi-Fi power status using networksetup
        OS_STATUS=$($BASECMD -getairportpower $IFACE | cut -d' ' -f4)
        # Set the final command to run
        CMD="$BASECMD -setairportpower $IFACE"
        # Get OS-specific status and assign to generic status variable
        if [[ $OS_STATUS == 'On' ]]; then
            STATUS="enabled"
        elif [[ $OS_STATUS == 'Off' ]]; then
            STATUS="disabled"
        fi
        ;;
    linux*)
        # Set the base command for interacting with network configuration
        BASECMD="/usr/bin/nmcli"
        # Get the current Wi-Fi power status using nmcli
        OS_STATUS=$($BASECMD radio wifi)
        # Set final command to run
        CMD="$BASECMD radio wifi"
        # Assign OS-specific status to generic status variable
        STATUS="$OS_STATUS"
        ;;
    *)
        # Present an error about an unsupported OS
        echo "Not supported on this operating system"
        exit 1
        ;;
esac

# Take action based on subcommand provided by the user
case "$1" in
    on)
        # Turn Wi-Fi interface on
        $CMD on
        ;;
    off)
        # Turn Wi-Fi interface off
        $CMD off
        ;;
    toggle)
        # Evaluate current status and toggle it
        if [[ $STATUS == 'enabled' ]]; then
            $CMD off
        else
            $CMD on
        fi
        ;;
    status)
        # Report the value of the generic status variable
        echo "$STATUS"
        ;;
    *)
        # Present an error about an unsupported subcommand
        echo "Unsupported subcommand provided"
        echo $HELP
        exit 1
        ;;
esac