Send new device notification to pushover.net

notify_new_device.sh

#!/bin/sh

cat << "EOF" > /etc/hotplug.d/dhcp/90-newdev
[ "$ACTION" == "add" ] || exit 0
# [ "$ACTION" == "add" -o "$ACTION" == "update" ] || exit 0

known_macs="/etc/known_macs"
user_key="your-user-key"
api_key="your-api-key"

if ! /bin/grep -iq "$MACADDR" "$known_macs"; then
  msg="New device detected:

MAC: $MACADDR
IP: $IPADDR
Hostname: $HOSTNAME"
  echo "$MACADDR $IPADDR $HOSTNAME" >> /etc/known_macs
  curl -s \
       --form-string "token=$api_key" \
       --form-string "user=$user_key" \
       --form-string "title=New Device" \
       --form-string "message=$msg" \
       https://api.pushover.net/1/messages.json
fi
exit 0
EOF