C pointer type representing file system access contexts.
Checks whether the given obj is a file system access context.
Creates a new file system access context for the user called username.
Retrieves the name of the user represented by the given access context.
Adds the lock identified by token to the given access context. This is necessary when committing to locked nodes.
Retrieves or sets the access context of a file system.
An access context value of #f means that no context is associated with the file system. Setting the context to #f disassociates any present context from the file system.