IDHBK | Back to Index page

| Prolog Control Block Contents IDHBK DSECT Storage Layout Cross Reference (Contains links to field and bit definitions) |
Programming Interface Information: This information is NOT intended to be used as Programming Interfaces of z/VM.

IDHBK Prolog | Top of page

     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).
     RELOCATION CONSIDERATIONS : None

IDHBK Control Block Content | Top of page

     IDHBK DSECT
    Top of page

    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 | Top of page

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

IDHBK Cross Reference | Top of page

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

This information is based on z/VM 7.2.0 Last updated on 24 Jun 2020 at 09:28:33 EDT.
Copyright IBM Corporation, 1990, 2020