Roland Kuhn <[email protected]> writes:
> Hi Guillaume!
>
> On 2 Feb 2007, at 14:48, Guillaume Chazarain wrote:
>
> > 2007/2/2, Roland Kuhn <[email protected]>:
> >
> >> That's a bug, right?
> >
> > No, if you want something like: (echo toto; date; echo titi) > file
> > to work in your shell, you'll be happy to have the seek position
> > shared in the processes.
Absolutely right. This has been part of Unix since the beginning.
> As a naive user I'd probably expect that each of the above adds to
> the output, which perfectly fits the O_APPEND flag (to be set by the
> shell, of course).
No, no, O_APPEND has slightly different semantics.
> The immediate point was about the flags, though, and having
> O_NONBLOCK on or off certainly is a _design_ choice when writing a
> program. If I remove O_NONBLOCK, I have a right to expect that I/O
> functions do not return EAGAIN!
Generally you don't want to mess with shared resouces like stdin,
stdout and stderr.
Phil.
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