On Mon, Oct 08, 2012 at 10:50:30PM +0100, Richard W.M. Jones wrote:
[.. discussion on gnulib test-cloexec test snipped ..]
> I'm suspicious this is a kernel bug:
>
> creat("test-cloexec.tmp", 0600) = 3
> fcntl(3, F_GETFD) = 0
> fcntl(3, F_GETFD) = 0
> fcntl(3, F_SETFD, FD_CLOEXEC) = 0
> fcntl(3, F_GETFD) = 0x1 (flags FD_CLOEXEC)
> fcntl(3, F_GETFD) = 0x1 (flags FD_CLOEXEC)
> fcntl(3, F_SETFD, 0) = 0
> fcntl(3, F_GETFD) = 0
> fcntl(3, F_DUPFD_CLOEXEC, 0) = 4
> fcntl(4, F_GETFD) = 0
> write(2, "test-cloexec.c:97: assertion failed\n", 36) = 36
>
> It seems to me from the description in the man page that
> F_DUPFD_CLOEXEC ought to be setting the FD_CLOEXEC flag on file
> descriptor 4, so either it's not or else F_GETFD isn't reading the
> flag for some reason.
Al Viro (CC'd) made some changes in this area recently ..
Rich.
--
Richard Jones, Virtualization Group, Red Hat http://people.redhat.com/~rjones
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