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Date: Tue, 11 Feb 2003 19:18:33 -0800 (PST)
From: Linus Torvalds <torvalds@transmeta.com>
To: Roland McGrath <roland@redhat.com>
cc: Ingo Molnar <mingo@redhat.com>, <linux-kernel@vger.kernel.org>
Subject: Re: another subtle signals issue
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On Tue, 11 Feb 2003, Roland McGrath wrote:
> 
> POSIX clearly specifies that stopping and continuing "shall not affect the
> behavior of any function" (when SIGCONT is SIG_DFL or SIG_IGN, or is blocked).

You just have to read it in a way that says "partial results are
permissible, and are part of the normal behaviour". And then the fact that
when ^Z happens you get partial results from pipes is not "different
behaviour" from a qualitative standpoint - even though in fact we'd get a
full result if the ^Z didn't happen.

Put another way: ^Z does perturb the exact details of a read from a pipe, 
but it does not in any way change the _semantics_ of the read.

			Linus

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