File Access Validation Module

Whenever a Fileshare Server receives an open request on a file from a Fileshare Client, the Fileshare Server calls the Fileshare Security at Open validation module (FSSecOpn).

The Fileshare Security at Open Validation module supplied with Fileshare allows any Fileshare Client to access a data file. If you need to restrict access to specific files, you must provide your own, alternative, Fileshare Security at Open Validation module for the Fileshare Server to call.

If the Fileshare Security at Open Validation module allows the file access, the operation is allowed to complete. If the module does not allow the file access, a file status of 9/037 "access denied" is returned to the Fileshare Client and the operation is not allowed to complete.

The sequence of steps that your program and Fileshare follow are:

1. Your program registers its user-ID and password with the File Handling Redirector password module. This information is used when the Fileshare Client first logs onto the Fileshare Server.
2. When your program subsequently performs an I/O operation on a file that it does not have open (such as an Open or Delete file operation), the Fileshare Server calls the Fileshare Security at Open Validation module (FSSecOpn)

You can replace the supplied Fileshare Security at Open Validation module with one of your own in order to use your own criteria for validating the open request. Your new module must comply with the Fileshare Security at Open Validation module's interface described below

call "fssecopn" using filename
                      filename-length
                      operation-code
                      user-ID
                      return-status