CLU search exit parameter descriptions

The parameters that the logon manager passes to the CLU search exit routine are described in this topic. There is a parameter list header that is common to all functions of the exit. The header contains a function code that indicates the reason the exit is being invoked. For all function codes, a set of function-specific parameters follows the parameter list header. The format of the header is described in Table 1.

Table 1. CLU search exit parameter list header
Dec (Hex) offset	Size (Bytes)	Description
0 (0)	4	Function code X'01' Exit initialization. X'02' A CLU session is being initiated and the CLU is available. X'03' An application program has become available. X'04' Two CLUs are to be compared. X'05' An application program is no longer available. X'06' A CLU session is being terminated and the CLU is no longer available. X'07' Exit termination
4 (4)	4	Logon manager vector table user extension control block pointer. This pointer allows the exit to allocate a global user extension control block during function code X'01' processing. The exit can use this area for building control structures that are not associated with any specific CLU. If the address of the control block is passed to the logon manager in this field, the logon manager saves the pointer and passes it back to the exit whenever the exit is called. On input to user code, this address is 0 for function code X'01'. Otherwise, the pointer is passed by the caller on every invocation.