It's because /dev/null will only feed you EOF when you try to read from
it.
On Tue, 2005-08-23 at 17:07 -0300, John Coppens wrote:
> Hello all.
>
> I'm trying to run SPICE from inside a GTK program. I've redirected stdin,
> stdout and stderr via pipes. The problem I have is with stdin:
>
> How can I tell spice to stop asking for input till I want to send some
> more? I read up some about directing the input to /dev/null, which would
> provide an EOF situation. I tried to assign this file to the pipe,
> without success:
>
> nll = open("/dev/null", O_RDONLY);
> dup2(nll, std_in[1]);
>
> where std_in[1] is the write port of the pipe.
>
> I always get 100% cpu occupation... Can someone indicate what to do here?
>
> TIA,
> John
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