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Message-ID:	<44D29487.6000806@ukf.net>
Date:	Fri, 04 Aug 2006 01:27:51 +0100
From:	Max Bowsher <maxb1 AT ukf DOT net>
Reply-To:	cygwin AT cygwin DOT com
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To:	cygwin AT cygwin DOT com
Subject:	Re: GnuPG bug: --refresh-keys
References:	<44D21D4C DOT 7050200 AT ukf DOT net>
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Max Bowsher wrote:
> When running 'gpg --refresh-keys', the second updated key results in:
>=20
> gpg: renaming `/home/max/.gnupg/pubring.gpg' to
> `/home/max/.gnupg/pubring.gpg~' failed: Permission denied
> gpg: error writing keyring `/home/max/.gnupg/pubring.gpg': file rename er=
ror
> gpg: key XXXXXXXX: "...." 28 new signatures
> gpg: error reading `[stream]': file rename error
>=20
>=20
> Given that:
>  * this happens for the *second* updated key
>=20
>  * having another process running at the same time, rapidly moving away
> any new pubring.gpg~ files avoids the error
>=20
>  * it is presumably Cygwin-specific
>=20
> it seems extremely likely that gnupg has a file descriptor leak, such
> that when the second key is processed, gnupg still has an open file
> descriptor on the file pubring.gpg~ when it attempts to overwrite it by
> renaming another file onto that name. Windows then objects.


Replying to my own mail...

GPG for some reason tries to cache opened fds for re-use. I suggest
disabling this caching for Cygwin. The appropriate code to tweak is in
util/iobuf.c:fd_cache_close(). I changed the condition of the first if
statement there to always be true, and the problem I reported goes away.

Please integrate this into the Cygwin packages.

Thanks,
Max.


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