GNU bug report logs - #10305
coreutils-8.14, "rm -r" fails with EBADF

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From: Eric Blake <eblake <at> redhat.com>
To: Joachim Schmitz <jojo <at> schmitz-digital.de>
Cc: 10305 <at> debbugs.gnu.org, eggert <at> cs.ucla.edu, bug-gnulib <at> gnu.org, 'Jim Meyering' <jim <at> meyering.net>
Subject: bug#10305: coreutils-8.14, "rm -r" fails with EBADF
Date: Fri, 16 Dec 2011 06:42:24 -0700

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On 12/16/2011 06:02 AM, Joachim Schmitz wrote:
> Hmm, I can dup() an fd for a directory if or had been open()'d O_RDONLY, but
> not if opened O_WRONLY or O_RDWR, I'll get an EISDIR from open() then.

But you shouldn't be able to open() a directory O_WRONLY or O_RDWR in
the first place, under POSIX.  Is this a bug in our open() wrapper for
permitting a bad open() on a directory, which then renders the fd
un-dup()able?  Or is it really some other O_* flag causing the issue?

> 
>> I thought gnulib had pretty good dup* test coverage, but see that no dup*
> test
>> uses a directory file descriptor.

Good point, I will look into adding some.

> Any workaround?

We'll probably come up with something, once we can further characterize
what is going on, but I don't have one right now.

-- 
Eric Blake   eblake <at> redhat.com    +1-919-301-3266
Libvirt virtualization library http://libvirt.org

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