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Date: Thu, 6 Mar 2008 15:26:14 +0100
From: Corinna Vinschen <corinna-cygwin AT cygwin DOT com>
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Subject: Re: bug with touch t/
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On Mar  6 07:02, Eric Blake wrote:
> -----BEGIN PGP SIGNED MESSAGE-----
> Hash: SHA1
>
> According to Corinna Vinschen on 3/6/2008 6:45 AM:
> | SUSv3(*) says:
> |
> |   [EISDIR]
> |     The named file is a directory and oflag includes O_WRONLY or O_RDWR.
> |   [ENOENT]
> |     O_CREAT is not set and the named file does not exist; or O_CREAT is
> |     set and either the path prefix does not exist or the path argument
> |     points to an empty string.
> |
> | Given these descriptions, I can't see anything wrong with that Linux
> | behaviour.
>
> By those SUSv3 rules (which are identical to POSIX), open("t/",
> O_RDONLY|O_CREAT) when t does not exist falls under ENOENT, not EISDIR.
> In POSIX 2004, path resolution requires that if a trailing slash is
> present, resolution is performed as if by "t/.", making "t" a path prefix
> which is not present.  And in the draft POSIX 200x, the wording has been
> made more explicit that when doing path resolution, if there is a trailing
> slash but the text before the slash does not name an existing directory,
> then it fails with ENOENT.
>
> But on Linux:
> Linux$ strace touch t/
> ~  [...]
> ~  open("t/", O_WRONLY|O_NONBLOCK|O_CREAT|O_NOCTTY, 0666) = -1 EISDIR (Is a
> directory)

But the flags are not O_RDONLY|O_CREAT.  They are O_WRONLY|O_CREAT.
That's why this falls under EISDIR under SUSv3 rules, afaics.

Which chapter in the austin doc are you refering to?  I can't find
this re-wording for some reason.


Corinna

-- 
Corinna Vinschen                  Please, send mails regarding Cygwin to
Cygwin Project Co-Leader          cygwin AT cygwin DOT com
Red Hat

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