fopen extensions

[jacob navia]

Does anyone know here about any fopen argument extensions?

I mean ways of specifying to fopen that the file should be shareable, or
similar flags in the fopen argument. For instance:
fopen("foo.txt" ,"rsb");
would mean shareable file with "rb" flags.

I would like to know the "previous art" in this domain

thanks

[Eric Sosman]

Re: fopen extensions



jacob navia wrote On 03/28/06 10:05,:[color=blue]
> Does anyone know here about any fopen argument extensions?
>
> I mean ways of specifying to fopen that the file should be shareable, or
> similar flags in the fopen argument. For instance:
> fopen("foo.txt" ,"rsb");
> would mean shareable file with "rb" flags.
>
> I would like to know the "previous art" in this domain[/color]

"rbs" is probably better than "rsb" (7.19.5.3/3 and
footnote 228).

Some implementations are said to support a "text"
flag as in "rt", but I don't see much use in it (the
"textness" is implied anyhow by the lack of a "b").

What I've actually seen has been more human readable,
like "w,recfm=vfc,ma xrec=510". It seems to me this sort
of thing offers greater transparency; somebody reading
a piece of code ported from the DS-9000 may have no
idea what the "s" flag means (all the DS-9000 documents
are classified Top Secret and written in Martian), but
may be able to make reasonable guesses about ",share".
Brevity is not the only virtue.

--
Eric.Sosman@sun .com

[Kenneth Brody]

Re: fopen extensions

Eric Sosman wrote:[color=blue]
>
> jacob navia wrote On 03/28/06 10:05,:[color=green]
> > Does anyone know here about any fopen argument extensions?[/color][/color]
[...][color=blue]
> What I've actually seen has been more human readable,
> like "w,recfm=vfc,ma xrec=510". It seems to me this sort
> of thing offers greater transparency; somebody reading
> a piece of code ported from the DS-9000 may have no
> idea what the "s" flag means (all the DS-9000 documents
> are classified Top Secret and written in Martian), but
> may be able to make reasonable guesses about ",share".
> Brevity is not the only virtue.[/color]

I grok my copy of the DS-6000 manual. (Sorry, I don't have the funds
to upgrade to the DS-9000 yet.)

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| Kenneth J. Brody | www.hvcomputer.com | |
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[Eric Sosman]

[OT] Re: fopen extensions



Kenneth Brody wrote On 03/28/06 11:07,:[color=blue]
> Eric Sosman wrote:
>[color=green]
>>jacob navia wrote On 03/28/06 10:05,:
>>[color=darkred]
>>>Does anyone know here about any fopen argument extensions?[/color][/color]
>
> [...]
>[color=green]
>> What I've actually seen has been more human readable,
>>like "w,recfm=vfc,ma xrec=510". It seems to me this sort
>>of thing offers greater transparency; somebody reading
>>a piece of code ported from the DS-9000 may have no
>>idea what the "s" flag means (all the DS-9000 documents
>>are classified Top Secret and written in Martian), but
>>may be able to make reasonable guesses about ",share".
>>Brevity is not the only virtue.[/color]
>
>
> I grok my copy of the DS-6000 manual. (Sorry, I don't have the funds
> to upgrade to the DS-9000 yet.)[/color]

It's actually the same model number: Martians count
in base 11.44714...

--
Eric.Sosman@sun .com