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Re: Snapshot heads up for 20060301 2310 version
- From: Eric Blake <ebb9 at byu dot net>
- To: cygwin at cygwin dot com
- Date: Thu, 02 Mar 2006 20:27:45 -0700
- Subject: Re: Snapshot heads up for 20060301 2310 version
- References: <BAY108-F151332E04387FA0EB25FC3B5F50@phx.gbl>
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According to Karl M on 3/2/2006 2:11 PM:
>> However, you're aware of the problems with mapping cygdrive to "/", are
>> you? You'll never see the list of available drives since the special
>> cygdrive handling can't kick in for the root dir. This also results in
>> a wrong link count for the root dir. There's no easy way to fix that
>> and it's definitely not of any priority to us to change this.
> What are the implications of having the wrong link count for the root dir?
Is the link count really wrong? The problem occurs when the link count of
/ is greater than 1, but is not exactly 2 more than the number of
subdirectories returned by readdir. Then programs doing recursive
traversal, such as find in findutils-4.2.27, fail to visit all
subdirectories when they take the traditional optimization that they can
stop stat'ing files to see whether there is another subdirectory to enter
once link count - 2 subdirectories have been encountered (the other two
link counts belong to . and ..). But if readdir doesn't list drive
letters when 'cygdrive' is set to /, then the link count may be okay after
all - now it is just the issue that ls and find won't even show drive
letters when you list the contents of / (nor will tab-completion find
drive letters, although there really isn't much sense in completing on a
drive letter!). I personally don't mount cygdrive to /, so I don't know
whether the latest snapshot gives a link count consistent with the number
of subdirectories actually listed when doing readdir on /.
Life is short - so eat dessert first!
Eric Blake email@example.com
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