On Wed, 16 Jan 2019 17:20:03 -0600, Kirk Wolf wrote:
>Quick and dirty from C to list directory and / or retrieve member
>statistics:
>
>fopen("MY.PDS", "rb,type=record,noseek,recfm=u")
>loop fread() ... 256 byte directory blocks until EOF
> - process each member entry in the block.
> See "DFSMS Using Data Sets" / PDS Directory for the layout structure
>fclose()
>
>ISPF stats are in the optional user data section of the member entry.
>ISP.SISPMACS(ISPDSTAT) can be used to map that for ISPF statistics.
>
>The z/OS XLC/C++ Programming Guide has a sample ""Listing Partitioned Data
>Set Members" in Appendix H "Additional Examples" that does this (except for
>the user data):
>
There's another set of stats kept for PDSE members, regardless of ISPF, the
FAMS information.
o I don't know the API.
o Microsecond granularity.
o NFS server uses them.
o HSM migrate-recall preserves them
o IEBCOPY unload-reload sets to time of reload.
Real OSes timestamp files.
Emerson. Consistency.
-- gil
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