Exchange/RJE Manual

OPEN Procedure
Exchange/RJE System Procedure Calls
5–22 104698 Tandem Computers Incorporated
Considerations The OPEN procedure establishes communication between your program and the
Exchange/RJE line server. The above description of the OPEN procedure describes
the minimum requirements for establishing communication with the Exchange/RJE
line server. This description omits a number of parameters that may be useful in your
particular situation. For a complete description of the OPEN procedure and its
parameters, see the Guardian Procedure Calls Reference Manual.
Before you can call the OPEN procedure, the specified Exchange/RJE line server must
have been started. You can start the line server with the NEWPROCESS procedure,
the RJESV command, or with the Exchange/RJE command interpreter’s CONNECT
command. It does not matter how the line server is started as long as it exists before
you call OPEN.
You must call OPEN before you can perform any I/O operations using the line server.
All I/O operations must identify the line server using the file number returned by
OPEN.
The Exchange/RJE line server allows only one open at a time. This restriction is
enforced by the line server regardless of the exclusion mode you specify in flags .