From: rog@vitanuova.com
To: 9fans@cse.psu.edu
Subject: Re: [9fans] union directories
Date: Fri, 23 Mar 2001 13:08:24 +0000 [thread overview]
Message-ID: <20010323120225.1F2D2199EF@mail.cse.psu.edu> (raw)
> > This is all a legacy of Unix's model that create means two different
> > things in the two situations.
>
> Well, there you go -- an attempt to create an existing file should
> fail. That is a simpler and more useful property.
it's not just a problem with the semantics of the create() system call,
but with the shell too.
if i type:
echo hello > /usr/rog/file
i expect /usr/rog/file to be created if it isn't already there, but
overwritten if it is.
if create didn't overwrite an existing file, the shell would have to do
exactly as the kernel does currently, and for most intents and purposes
you'd still get the same "dual meaning".
i think under 9p2000 it's possible to call create() with an OEXCL
option and get the semantics you suggest.
cheers,
rog.
next reply other threads:[~2001-03-23 13:08 UTC|newest]
Thread overview: 31+ messages / expand[flat|nested] mbox.gz Atom feed top
2001-03-23 13:08 rog [this message]
2001-03-26 8:44 ` Douglas A. Gwyn
-- strict thread matches above, loose matches on Subject: below --
2003-03-03 20:45 Keith Nash
2003-03-03 20:51 ` Russ Cox
2003-03-03 20:00 Keith Nash
2003-03-03 20:05 ` Russ Cox
2003-03-03 18:58 rog
2003-03-03 23:17 ` anyrhine
2003-03-03 13:18 rog
2003-03-03 17:40 ` Ronald G. Minnich
2003-03-03 18:05 ` Russ Cox
2003-03-03 18:09 ` Ronald G. Minnich
2003-03-03 18:16 ` Russ Cox
2003-02-28 18:52 Joel Salomon
2003-02-28 18:56 ` Russ Cox
2003-02-28 21:16 ` Jack Johnson
2003-02-28 22:58 ` Geoff Collyer
2003-02-28 23:19 ` Jack Johnson
2003-02-28 23:59 ` Geoff Collyer
2003-02-15 19:37 [9fans] presentation preparation Scott Schwartz
2003-02-15 19:48 ` andrey mirtchovski
2003-02-27 9:35 ` Ralph Corderoy
2003-02-28 18:44 ` [9fans] union directories Jack Johnson
2003-02-28 18:53 ` Russ Cox
2003-03-04 9:44 ` Adrian Tritschler
2001-03-23 13:30 G. David Butler
2001-03-22 3:28 rob pike
2001-03-23 10:06 ` Douglas A. Gwyn
2001-03-22 2:57 Gorka Guardiola Muzquiz
2001-03-22 2:46 Gorka Guardiola Muzquiz
2001-03-22 2:42 Gorka Guardiola Muzquiz
2001-03-22 2:37 Russ Cox
2001-03-22 2:02 Russ Cox
2001-03-22 1:56 Gorka Guardiola Muzquiz
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