The component is designed to establish connections to update servers of Doctor Web for checking for updates to virus databases and anti-virus engine Dr.Web Virus-Finding Engine. The lists of update servers are stored in a special file (the file is signed to prevent modification).
If the suite is not connected to the central protection server or is connected to the server in mobile mode, Dr.Web Updater is automatically started by the configuration daemon. Startup is performed at periods specified in the settings. The component can be also started by the configuration daemon if the appropriate command is received from a user (unscheduled update). The component operation scheme is shown in the picture below.
Picture 39. Component operation scheme
When updates become available on the server, they are downloaded to the <var_dir>/cache directory (for Linux — var/opt/drweb.com/cache), after that they are moved to the working directory of Dr.Web for UNIX File Servers.