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 ebl...@redhat.com +1-919-301-3266 Libvirt virtualization library http://libvirt.org
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