WWIV's network stack uses a handful of semaphore files to block concurrent access while operations are ongoing. Here's the list of semaphore files currently used.
These Semaphore files reside in or in a subdirectory of the WWIV network
C:\bbs\net\wwivnet is the default wwivnet network
In these examples, we'll use
[network] to denote the network
[networkn] is the name of the network command e.g.
It's used to denote that the network command is running and additional
copies should not attempt to execute.
[flo_name] is the same name as a FLO file, blocks access to manipulating
the FLO file while it is being rewritten with information.