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Date: Fri, 2 Aug 2002 00:35:40 +0200 (CEST)
From: Roman Zippel <zippel@linux-m68k.org>
X-X-Sender: roman@serv
To: Linus Torvalds <torvalds@transmeta.com>
cc: David Woodhouse <dwmw2@infradead.org>, David Howells <dhowells@redhat.com>,
       <alan@redhat.com>, <linux-kernel@vger.kernel.org>
Subject: Re: manipulating sigmask from filesystems and drivers 
In-Reply-To: <Pine.LNX.4.33.0208011430450.1647-100000@penguin.transmeta.com>
Message-ID: <Pine.LNX.4.44.0208020009490.28515-100000@serv>
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Hi

On Thu, 1 Aug 2002, Linus Torvalds wrote:

> This is not "sloppy programming". See the read() system call manual, which
> says
>
>      Upon successful completion, read(), readv(), and pread() return the num-
>      ber of bytes actually read and placed in the buffer.  The system guaran-
>      tees to read the number of bytes requested if the descriptor references a
>      normal file that has that many bytes left before the end-of-file, but in
>      no other case.
>
> Note the "The system guarantees to read the number of bytes requested .."
> part.

Relying on that the fd will always point to a normal file is only asking
for trouble.

> Stop arguing about this. It's a FACT.

Linus, it's not that I don't want to believe you, but e.g. the SUS doesn't
make that special exception.
Installing signal handlers and not expecting EINTR _is_ sloppy
programming.

bye, Roman

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