HP UX 11i v1 I/O Cards manual ZLU Type Values, Type Description

ZCOM Tables and Data Structures

ZLU Tables

	ZCKSUM - ZLU checksum
	The checksum is used as an integrity check to ensure that a ZLU has not
	been altered while it is active. It is the 16-bit binary sum of bytes 3 to 18
	of the ZLU entry (with any overflow discarded). It is calculated when the
	ZLU table entry is created.
	ZLTYPE - Type of ZLU
	The ZLU type values are shown in Table 3-8. The type value is also used
	to indicate whether the ZLU is defined.
Table 3-8	ZLU Type Values
Type	Description
0	ZLU is not defined
1	ZLU is local terminal (ZPOINT is a logical terminal number *)
2	ZLU is a local program (ZPOINT is a queue number)
3	ZLU is mapped (ZPOINT is a mapped ZLU node number)

*The logical terminal number is allocated by TTGEN from the TTGEN configuration file.

ZPOINT - ZLU pointer or mapped node number

The field is used to link the ZLU with the entity it represents. The meaning of the field is given in the table under ZLTYPE.

ZMPZLU - Mapped ZLU number

If the ZLU is type 3 (mapped ZLU), then this is the ZLU number (on the node as given by ZPOINT) onto which this ZLU is being mapped. If ZLU is not type 3, ZMPZLU is set to zero.

ZMPZCS - Mapped ZLU checksum

If the ZLU is not type 3, ZMPZCS is set to zero. Otherwise, this contains the checksum of the mapped ZLU.

ZLNAME - Name of ZLU

Name assigned to the ZLU by the creator of the ZLU. If the ZLU is the input queue to a program then this name is usually Z99999 - where 99999 is the program PID number. In this case the other 2 bytes are space filled. The program ZLU name can be assigned by the zopen call when the ZLU is allocated. The ZLU name can be found using zinfo given

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