Programming Interface Information:
This information is NOT
intended to be
used as Programming Interfaces of VM/ESA. It is to be
used for diagnosis only.
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DMSCDB
Prolog
Control Block Contents
DMSCDB DSECT
Storage Layout
Cross Reference (Contains links to field and bit definitions)
DMSCDB Prolog
NAME : DMSCDB
DESCRIPTION: COMDIR CONTROL BLOCK
DSECT : DMSCDB
FUNCTION : The DMSCDB macro provides a mapping
of the COMDIR control block. The macro contains
two DSECTs: DMSCDB and CDBOVL.
DMSCDB Control Block Content
DMSCDB DSECT
Hex Dec Type/Val Lng Label (dup) Comments
---- ---- --------- ---- -------------- --------
0000 0 Structure DMSCDB COMDIR CONTROL BLOCK
0000 0 Character 8 CDBEYEC eyecatcher for COMDIR block
0008 8 Character 24 CDBSYS system level information
0008 8 Character 18 CDBSFID system filespec
0008 8 Character 8 CDBSFN system file name
0010 16 Character 8 CDBSFT system file type
0018 24 Character 2 CDBSFM system file mode
001A 26 Character 1 CDBSFLG system flags
001B 27 Character 1 *
001C 28 Address 4 CDBSBLK ptr to NAMEFSYS SCBLOCK
0020 32 Character 24 CDBUSER user level information
0020 32 Character 18 CDBUFID user filespec
0020 32 Character 8 CDBUFN user file name
0028 40 Character 8 CDBUFT user file type
0030 48 Character 2 CDBUFM user file mode
0032 50 Character 1 CDBUFLG user flags
0033 51 Character 1 *
0034 52 Address 4 CDBUBLK ptr to NAMEFUSE SCBLOCK
0038 56 Character 20 CDBCR
0038 56 Signed 4 CDBCDSCE COMDIR saved C/E ptr
003C 60 Signed 4 CDBUSCE USER saved C/E ptr
0040 64 Signed 4 CDBUSCEL USER saved C/E length
0044 68 Character 8 CDBUSRI USER saved RESID
DMSCDB Storage Layout
*** DMSCDB - COMDIR CONTROL BLOCK
*
* +-------------------------------------------------------+
* 0 | CDBEYEC |
* +-------------------------------------------------------+
* 8 | |
* = CDBSYS =
* | |
* +-------------------------------------------------------+
* 20
*
*** DMSCDB - COMDIR CONTROL BLOCK
*** Overlay for CDBSYS in DMSCDB
*
* +-------------------------------------------------------+
* 8 | |
* = CDBSFID =
* | +-----------------------------------------+
* | | 1A
* +-------------+
*
*** Overlay for CDBSYS in DMSCDB
*** Overlay for CDBSFID in DMSCDB
*
* +-------------------------------------------------------+
* 8 | CDBSFN |
* +-------------------------------------------------------+
* 10 | CDBSFT |
* +-------------+------+------+---------------------------+
* 18 | CDBSFM |:SFLG |//////| CDBSBLK |
* +-------------+------+------+---------------------------+
* 20 | |
* = CDBUSER =
* | |
* +-------------------------------------------------------+
* 38
*
*** Overlay for CDBSFID in DMSCDB
*** Overlay for CDBUSER in DMSCDB
*
* +-------------------------------------------------------+
* 20 | |
* = CDBUFID =
* | +-----------------------------------------+
* | | 32
* +-------------+
*
*** Overlay for CDBUSER in DMSCDB
*** Overlay for CDBUFID in DMSCDB
*
* +-------------------------------------------------------+
* 20 | CDBUFN |
* +-------------------------------------------------------+
* 28 | CDBUFT |
* +-------------+------+------+---------------------------+
* 30 | CDBUFM |:UFLG |//////| CDBUBLK |
* +-------------+------+------+---------------------------+
* 38 | |
* = CDBCR =
* | +---------------------------+
* | | 4C
* +---------------------------+
*
*** Overlay for CDBUFID in DMSCDB
*** Overlay for CDBCR in DMSCDB
*
* +---------------------------+---------------------------+
* 38 | CDBCDSCE | CDBUSCE |
* +---------------------------+---------------------------+
* 40 | CDBUSCEL | CDBUSRI- |
* +---------------------------+---------------------------+
* 48 | -(044) | 4C
* +---------------------------+
*
*** Overlay for CDBCR in DMSCDB
DMSCDB Cross Reference (contains links to field and bit definitions)
Symbol Dspl Value
-------------- ---- -----
CDBCDSCE 0038
CDBCR 0038
CDBEYEC 0000
CDBSBLK 001C
CDBSFID 0008
CDBSFLG 001A
CDBSFM 0018
CDBSFN 0008
CDBSFT 0010
CDBSYS 0008
CDBUBLK 0034
CDBUFID 0020
CDBUFLG 0032
CDBUFM 0030
CDBUFN 0020
CDBUFT 0028
CDBUSCE 003C
CDBUSCEL 0040
CDBUSER 0020
CDBUSRI 0044
This information is
based on VM/ESA 2.4.0.
Last updated on 18 Aug 1999 at 09:19:02 EDT.
Copyright IBM Corporation, 1990, 1999
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