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Date: Sun, 9 Sep 2001 19:40:56 -0400
From: Christopher Faylor <cgf AT redhat DOT com>
To: cygwin AT cygwin DOT com
Subject: Re: 1.3.2 rmdir fails if CWD is in the directory to be deleted?
Message-ID: <20010909194056.A11565@redhat.com>
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On Sun, Sep 09, 2001 at 01:29:55PM +0100, James Youngman wrote:
>Randall R Schulz <rrschulz AT cris DOT com> writes:
>
>> You should try it. On many Unix systems it will work just
>> fine. After the rmdir call, no call that uses a relative file name
>> will work, however, since the directory must have been empty to be
>> removed and in doing so the .. link would have been removed.
>> 
>> This applies to "classic" implementations on the Unix file
>> system. Chris has pointed out that IRIX does not behave this
>> way. Since those details are not part of the API specifications, the
>> implementers get to do what they please.
>
>The (POSIX)|(X/Open) spec currenly says (about rmdir()) :-
>
>(38292 ff.)
>
>> The rmdir( ) function shall remove a directory whose name is given
>> by path. The directory shall be removed only if it is an empty
>> directory.  If the directory is the root directory or the current
>> working directory of any process, it is unspecified whether the
>> function succeeds, or whether it shall fail and set errno to
>> [EBUSY].  If path names a symbolic link, then rmdir( ) shall fail
>> and set errno to [ENOTDIR].
>> 
>> If the directory's link count becomes 0 and no process has the
>> directory open, the space occupied by the directory shall be freed
>> and the directory shall no longer be accessible. If one or more
>> processes have the directory open when the last link is removed, the
>> dot and dot-dot entries, if present, shall be removed before rmdir(
>> ) returns and no new entries may be created in the directory, but
>> the directory shall not be removed until all references to the
>> directory are closed.  If the directory is not an empty directory,
>> rmdir( ) shall fail and set errno to [EEXIST] or [ENOTEMPTY].
>
>My reading of this is that if you have a directory open by virtue of
>it being your working directory, then it is valid for rmdir() to fail.
>If however it is open via opendir(), then the rmdir() must succeed.  

Hmm.  I read "open" as also being "open as the current working
directory".

In any event, cygwin/windows will fail for both of these situations, I
think.

cgf

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