Programming Interface Information: This information is NOT intended to be used as Programming Interfaces of z/VM.

#### IDHBK

Prolog

Control Block Contents
IDHBK DSECT

Storage Layout

Cross Reference (Contains links to field and bit definitions)

#### IDHBK Prolog

     NAME       : HCPIDHBK
     DESCRIPTION: Spool Image Library Directory Header
     DSECT      : IDHBK
     FUNCTION   : To map out the directory header information
                  in a 3800 image library file.
     LOCATED BY : The directory header is located at the
                  beginning of the first directory record in
                  the file.
     CREATED BY : IMAGELIB command (HCPNMTBL)
                  IMAGEMOD command (DMSIMAGE)
     DELETED BY : All the contents of an IMG file, including
                  the IDHBKs, are deleted by the "PURGE IMG"
                  command processing (HCPCSUPU).

#### IDHBK Control Block Content

#### IDHBK DSECT

    Hex   Dec Type/Val   Lng Label (dup)    Comments
    ---- ---- --------- ---- -------------- --------
    0000    0 Structure      IDHBK          Spool Image Library Directory Header
    0000    0 Character    8 IDHNAME        Image Library name
    0008    8 Signed       4 IDHLENDR       Length of directory record,
                                            including header
    000C   12 Signed       4 IDHNUMDE       Number of directory entries
                                            (IDMBKs)
              00000010       IDHSIZE        *-IDHBK Size in bytes
              00000002       IDHSZDW        (*-IDHBK+7)/8 Size in doublewords

#### IDHBK Storage Layout

    *** IDHBK - Spool Image Library Directory Header
    *
    *     +-------------------------------------------------------+
    *   0 |                       IDHNAME                         |
    *     +---------------------------+---------------------------+
    *   8 |         IDHLENDR          |         IDHNUMDE          |
    *     +---------------------------+---------------------------+
    *  10
    *
    *** IDHBK - Spool Image Library Directory Header

#### IDHBK Cross Reference

    Symbol         Dspl Value
    -------------- ---- -----
    IDHLENDR       0008
    IDHNAME        0000
    IDHNUMDE       000C
    IDHSIZE        000C 00000010
    IDHSZDW        000C 00000002

This information is based on z/VM V6R1.0. Last updated on 18 Feb 2010 at 08:43:44 EDT.
Copyright IBM Corporation, 1990, 2008