S-OPEN-FUNCTION (op-code 1)

This routine opens an existing sequential file. If it is successful, the value in RETURN-CODE should be moved to a data item that is USAGE HANDLE. This data item is passed as the open file handle to the other file handling routines. If it fails, RETURN-CODE is set to a NULL value.

The S-OPEN-FUNCTION routine has four required parameters, and three optional parameters: name, mode, recsize, type, blocking, padding, pipe_name.