FSBK | Back to Index page

| Prolog Control Block Contents FSBK 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.

FSBK Prolog | Top of page

     NAME       : HCPFSBK
     DESCRIPTION: CP File Status Block
     DSECT      : FSBK
     FUNCTION   : The FSBK contains information about a single
                  file on the mini-disk
     LOCATED BY : FSBK.FSHFSBR(i)
                  OFBK.OFBFSB
     CREATED BY : HCPZIA
     DELETED BY : HCPZIA
                  HCPZIR
     RELOCATION CONSIDERATIONS : None
     COMMENTS   : The CMS FSTD is copied in total.  CMS fields that CP
                  does not use are "reserved" or just plain ignored.
                  Some (FSBOPENS, for example) are redefined over CMS
                  fields that CP does not care about.
                  Individual FSBK storage areas are actually contiguous
                  sections in full pages that are pointed to by FSHBKs.
                  Individual FSBKs are never allocated by HCPGETST and
                  never released by HCPRELST.

FSBK Control Block Content | Top of page

     FSBK DSECT
    Top of page

    Hex   Dec Type/Val   Lng Label (dup)    Comments
    ---- ---- --------- ---- -------------- --------
    0000    0 Structure      FSBK           CP File Status Block
    0000    0 Character   16 FSBFID (0)     File-id, filename-filetype
    0000    0 Character    8 FSBFIDFN       File-id, filename portion
    0008    8 Character    8 FSBFIDFT       File-id, filetype portion
    0010   16 Signed       4 FSBOPENS       Count of times opened
    0014   20 Signed       4 FSBCLOSD       Count of times closed
    0018   24 Signed       4 FSBOPEND       Count of times was already open
    001C   28 Signed       2 *
    001E   30 Character    1 FSBRECFM       - F*1 - RECORD FORMAT - F OR V
              11.. .11.      FSBDFIX        C'F' FSBDFIX - Fixed record
                                            format
              111. .1.1      FSBDVAR        C'V' FSBDVAR - Variable record
                                            format
    001F   31 Bitstring    1 FSBFLAG        Flag byte for FSBK
              1... ....      FSBCACHE       X'80' FSBCACHE File has been
                                            cached
              .... 1...      FSBCNTRY       X'08' FSBCNTRY Century for date
                                            in FSBDATIM (0=19, 1=20)
    0020   32 Signed       4 FSBLRECL       Longest record in file
    0024   36 Signed       4 *
    0028   40 Signed       4 FSBFOP         File Origin Pointer
    002C   44 Signed       4 FSB#DBC        Number of data blocks
    0030   48 Signed       4 FSBRECDS       Last record in file
    0034   52 Signed       1 FSB#LVL        Levels of pointer blocks
    0035   53 Bitstring    1 *
    0036   54 Character    6 FSBDATIM       Date & Time (YY MM DD HH MM SS)
    003C   60 Character    1 *
    003D   61 Bitstring    1 *
    003E   62 Character    2 *
    0040   64 Dbl-Word     8 FSB$END (0)    End of FSBK
              00000040       FSBSIZEB       (*-FSBK) Size in bytes
              00000008       FSBSIZED       (*-FSBK+7)/8 Size in d-words

FSBK Storage Layout | Top of page

    *** FSBK - CP File Status Block
    *
    *     +-------------------------------------------------------+
    *   0 |                       FSBFIDFN                        |
    *     +-------------------------------------------------------+
    *   8 |                       FSBFIDFT                        |
    *     +---------------------------+---------------------------+
    *  10 |         FSBOPENS          |         FSBCLOSD          |
    *     +---------------------------+-------------+------+------+
    *  18 |         FSBOPEND          |/////////////|:RECFM|:FLAG |
    *     +---------------------------+-------------+------+------+
    *  20 |         FSBLRECL          |///////////////////////////|
    *     +---------------------------+---------------------------+
    *  28 |          FSBFOP           |         FSB#DBC           |
    *     +---------------------------+------+------+-------------+
    *  30 |         FSBRECDS          |:#LVL |//////|   (036)-    |
    *     +---------------------------+------+------+-------------+
    *  38 |        -FSBDATIM          |//////|//////|/////////////|
    *     +---------------------------+------+------+-------------+
    *
    *** FSBK - CP File Status Block

FSBK Cross Reference | Top of page

    Symbol         Dspl Value
    -------------- ---- -----
    FSB$END        0040
    FSB#DBC        002C
    FSB#LVL        0034
    FSBCACHE       001F 80
    FSBCLOSD       0014
    FSBCNTRY       001F 08
    FSBDATIM       0036
    FSBDFIX        001E C6
    FSBDVAR        001E E5
    FSBFID         0000
    FSBFIDFN       0000
    FSBFIDFT       0008
    FSBFLAG        001F
    FSBFOP         0028
    FSBLRECL       0020
    FSBOPEND       0018
    FSBOPENS       0010
    FSBRECDS       0030
    FSBRECFM       001E
    FSBSIZEB       0040 00000040
    FSBSIZED       0040 00000008

This information is based on z/VM 7.2.0 Last updated on 24 Jun 2020 at 09:29:27 EDT.
Copyright IBM Corporation, 1990, 2020