The eventhandler is a program or script, that smsd runs, whenever it receives or sent a message or when it was not able to send a message.
Smsd calls the script before it moves the file from the provider queue into the failed or sent queue.
Smsd gives two or three arguments to the eventhandler. The first one is SENT, RECEIVED, FAILED or REPORT. The second one is the SMS file filename. The third argument is the message id of the SENT message, it is only used if you sent a message successfully with status report enabled.
During installation an example script will be copied: /usr/local/bin/smsevent
Example:
#!/bin/sh
# This is an example how to use an eventhandler with smsd.
echo smsd reports an event:
echo type: $1
echo file: $2
echo id: $3
This script displays a message for each event.
The book describes how to use eventhandler to do different things automatically, like forwarding to eMail, storing received messages and status report into SQL database, running a self-test, publishing received messages with a webserver and more.