The argument is optional; if omitted, /etc/sockd.fc is assumed.
The frozen configuration file is produced by make_sockdfc and is essentially the memory image of the parsed configuration file. Using the frozen configuration file can reduce the start-up delay of the SOCKS server program since it no longer has to parse the file contents.
When the SOCKS server starts, it always looks for the frozen configuration file /etc/sockd.fc first. If that file is not found, it then tries to use the plain-text configuration file /etc/sockd.conf. If you use frozen configuration, you must remember to run make_sockdfc every time after you modify the plain-text file or the SOCKS server will continue to use the frozen file of a previous configuration.
Ying-Da Lee, email@example.com or firstname.lastname@example.org