You can have external programs react to events in near real time. For example, if you wanted to run a script every time there was a file downloaded, you would set download-event-processor to the full pathname of the script.  The server will then run that script each time, with various command line arguments.

Obviously I do not recommend using this facility unless you absolutely need to, for two important reasons:

1. Spawning and executing programs impacts system performance.
2. The programs are run with root privileges -- unless you are very experienced with writing secure programs, you could mistakenly leave your system vulnerable to malicious local users.

Nevertheless, if you wish to proceed, you can look at the process_ncftpd_event.sh script which comes with the distribution as an example.

Examples:

download-event-processor=/usr/local/etc/ncftpd/process_ncftpd_event.sh
#download-event-processor=  (commented out)

#download-event-processor=  (commented out)

• ncftpd_eventd
• upload-event-processor
• login-event-processor
• logout-event-processor