wifi

#!/usr/bin/env sh

# Currently only works with single wireless card (picks first one found)

wireless_interface() { # Find wireless interface name

  nmcli d | awk '/802-11-wireless/ {print $1}'

}

wifi_usage() {

cat <<EOF
Wifi is a wrapper for nmcli.

Usage: pkg UTILITY [OPTIONS]

    list           - List available wireless connections
    connections    - List saved connections
    add            - Add a new connection
    connect        - Connect to a saved connection
    disconnect     - Disconnect all active connections
    status         - List active connections
    on             - Turn wireless on
    off            - Turn wireless off
    -h|--help      - print this message

EOF

  return 0

}

path_hasbin() { # Test to see if a binary exists in the path

  [ "$#" -ne "1" ] && return 2
  type $1 > /dev/null 2>&1 || { echo "  '$1' not installed" ; return 1 ; }

}

wifi() {

  path_hasbin nmcli || return 1

  case "$1" in
    'list') # List saved connections
      nmcli d wifi list
      ;;
    'connections')
      nmcli c
      ;;
    'add') # Add a saved connection
      shift
      ssidWifi="$1"
      passwordWifi="$2"
      # If no password is provided, assume one is not needed
      if [ -z "$passwordWifi" ]; then
        passwordWifi=""
      else
        passwordWifi="password $2"
      fi
      # Add connection
      nmcli d wifi connect "$ssidWifi" $passwordWifi iface "$(wireless_interface)" name "$ssidWifi" || \
        { echo "ERROR: failed to connect to $ssidWifi" ; return 1 ; }
      ;;
    'connect') # Connect to a saved connection
      shift
      ssidWifi="$1"
      nmcli c up id "$ssidWifi"
      ;;
    'disconnect') # Disconnect from current wireless network
      nmcli d disconnect iface $(wireless_interface)
      ;;
    'remove') # Remove a saved connection
      shift
      ssidWifi="$1"
      nmcli c delete id "$ssidWifi"
      ;;
    'status') # List active connections if any
      nmcli c status
      ;;
    'on') # Turn wireless on
      nmcli nm wifi on
      ;;
    'off') # Turn wireless off
      nmcli nm wifi off
      ;;
    '-h'|'--help'|'help')
      wifi_usage
      ;;
    *)
      wifi_usage
      echo "ERROR: invalid option: $@"
      ;;

  esac

}