Precisely.  One seeking to use a tool program executable does not look in
the C/C++ development manuals.  One looks in the manuals that document the
tool program.

I said "undocumented" exactly because the Unix System Services manuals do
not say which tool programs use open() and which use fopen().  They only say
what they will support to work with MVS datasets.  And of course it will
stay that way because they could change the source of any tool program at
any time they feel like it and start using open() instead.

I was just describing what exists (for now).

Peter

-----Original Message-----
From: McKown, John [mailto:[EMAIL PROTECTED] 
Sent: Thursday, July 14, 2005 1:13 PM
To: [email protected]
Subject: Re: Open MVS question

> -----Original Message-----
> From: IBM Mainframe Discussion List
> [mailto:[EMAIL PROTECTED] On Behalf Of Farley, Peter x23353
> Sent: Thursday, July 14, 2005 9:55 AM
> To: [email protected]
> Subject: Re: Open MVS question
> 
> And though undocumented and unsupported, any Unix System
> Service program
> that uses only fopen()/fread()/fclose() can also access MVS datasets
> directly.  "awk" is one tool I have successfully used to do this.

Undocumented? It is well documented in the C/C++ manual. Just not in the
UNIX manuals. And the UNIX manuals do not tell you which utilities use
fopen() and which use open(). Programs which use open() cannot support
the "//dsn" or "//dd:ddn" method of opening MVS "legacy" datasets.

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