10-chrony


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#!/bin/sh

INTERFACE=$1
STATUS=$2

# Make sure we're always getting the standard response strings
LANG='C'

CHRONY=$(which chronyc)

chrony_cmd() {
  echo "Chrony going $1."
  exec $CHRONY -a $1
}

nm_connected() {
  # Let networkmanager check if we are able to reach the internet
  [ "$(nmcli networking connectivity check)" = 'full' ]
}

if [ "$INTERFACE" = "lo" ]; then
  # Local interface, nothing to do, exit early
  exit 0
fi

case "$STATUS" in
  up|vpn-up)
    # Check for full connectivity, take online if connected
    nm_connected && chrony_cmd online
  ;;
  down|vpn-down)
    # Check for full connectivity, take offline if not connected
    nm_connected || chrony_cmd offline
  ;;
esac