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Re: lib/45148: dup2(3) and dup3(3) should support EINVAL
On Fri, Jul 15, 2011 at 08:45:01AM +0000, Martin Husemann wrote:
> On Fri, Jul 15, 2011 at 08:30:00AM +0000, Jukka Ruohonen wrote:
> > In Linux the dup3(3) call fails with EINVAL (a) if the specified flags
> > contain an invalid value or (b) if "newfd" equals "oldfd". The case (b)
> > applies also to dup2(3).
> I don't think so:
> the open group base spec issue 7 says:
> If fildes2 is already a valid open file descriptor, it shall be closed
> first, unless fildes is equal to fildes2 in which case dup2() shall
> return fildes2 without closing it.
> Our dup2(3) man page has weaker words, but to the same effect.
Yes, however dup3(2) is not standardized, AFAIR, leaving the behavior
"undefined". And the case (a) should still apply.
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