Al:
A second problem we noticed from the gnulib test is that this
assertion fails with the latest upstream kernel:
/* Assigning to self is invalid. */
errno = 0;
ASSERT (dup3 (fd, fd, o_flags) == -1); <--- fails
ASSERT (errno == EINVAL);
dup3 is not currently specified by POSIX, so technically it is fine
for dup3 on Linux to do anything it likes.
*However* the proposal for dup3 in POSIX:
http://austingroupbugs.net/view.php?id=411
says:
"The dup3( ) function shall be equivalent to the dup2( ) function if
the flag argument is 0, except that it shall be an error if fildes
is equal to fildes2."
So it's probably a good idea for Linux not to regress here.
Rich.
--
Richard Jones, Virtualization Group, Red Hat http://people.redhat.com/~rjones
virt-p2v converts physical machines to virtual machines. Boot with a
live CD or over the network (PXE) and turn machines into Xen guests.
http://et.redhat.com/~rjones/virt-p2v
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