I've been assigned to upgrade an embedded application written in C. The application is configured via a web interface.
When the user modifies the web application a file is written to /var/www/settings.json
and the file /var/www/UPDATE_SETTINGS
is touched.
In the main application loop it checks to see if UPDATE_SETTINGS
exists. If it does it parses the settings.json
with json-c and then deletes UPDATE_SETTINGS
.
This works well enough, however, we would prefer to move to an event-driven architecture (perhaps libev) in which settings.json
is fed directly into the program by the webapp script to a plain-old UDP port and then issue a callback to perform the update.
What are some other elegant ways to solve this problem? Should we just stick with the current approach?
Just use inotify. It was created for cases like yours.