Exchange/SNA Manual

Contents
viii 104700 Tandem Computers Incorporated
Considerations 3-71
Examples 3-72
Section 4 Using the Exchange/SNA Programmatic Interface
System Procedure Call Summary 4-1
Programming Considerations 4-2
Wait and Nowait I/O Operations 4-2
Designing Console Programs 4-5
Error Handling 4-6
The Trace Server 4-9
Step-by-Step Instructions 4-10
Step 1
Start the Line Server 4-10
Step 2
Open a Subdevice Supported by the Line Server 4-10
Step 3
Set the Operational Parameters 4-11
Step 4
Perform the Operation 4-12
Step 5
Close the Subdevice 4-14
Using Exchange/SNA With Existing Programs 4-15
Section 5 EXCHANGE/SNA System Procedure Calls
AWAITIO Procedure 5-2
Considerations 5-4
CANCEL Procedure 5-6
Considerations 5-6
CANCELREQ Procedure 5-7
Considerations 5-7
CLOSE Procedure 5-8
Considerations 5-8
CONTROL Procedure 5-9
Considerations 5-9
FILEINFO Procedure 5-11
Considerations 5-11
OPEN Procedure 5-12