Re: dup2() vs dup3() inconsistency when

[Ulrich Drepper]

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H. Peter Anvin wrote:
> The result of dup3(fd, fd, O_CLOEXEC) is to set the O_CLOEXEC flag on fd.

That's bad and disregarded by Al and myself because it is one and the
same descriptor and therefore it changes the source descriptor.


> Step (2) could be considered a bit dubious, but the behaviour of
> dup2(fd, fd) is a direct consequence of the chosen semantics.

The behavior of dup2(fd,fd) is just a result of an accident in the
original implementation.  It makes no sense and the mistake doesn't have
to be repeated.

- --
â Ulrich Drepper â Red Hat, Inc. â 444 Castro St â Mountain View, CA â
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