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From:	John Wiersba <John DOT Wiersba AT medstat DOT com>
To:	"'cygwin'" <cygwin AT sourceware DOT cygnus DOT com>
Subject:	unlink() problem
Date:	Tue, 31 Jul 2001 18:22:35 -0400
MIME-Version:	1.0
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I'm having a problem with unlink().  I've scanned the FAQ and searched some
in the newsgroup archives for information about the following problem.  I
did find a post (see
http://sources.redhat.com/ml/cygwin/2001-05/msg01095.html) but no apparent
resolution.

$ touch asdf
$ perl -i -pe 1 asdf
Can't do inplace edit on asdf: Permission denied.

What perl is doing is equivalent to:

$ perl -e '
   open A, "< asdf" or die "one $!";  # open asdf for read
   unlink "asdf";
   open B, "> asdf" or die "two $!";  # open asdf for write
   while (<A>) { print B }            # copy from A to B
'
two Permission denied at -e line 4.

The problem:  after the unlink(), I can't open the same filename for write
as I can on unix.  If I pause the program after unlinking asdf, it is still
there and can be seen by ls, but can't be read by ls -l.  

Is there a workaround for this behavior?  Is it considered a bug or is it
just a quirk of the cygwin implementation of trying to implement unix
filesystem semantics on top of windows?

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