linux-kernel - PROPOSAL: extend pipe() to support NULL argument.

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Message-ID: <412e6f7f0907020036y76abbc7du99c7b695f725be4@mail.gmail.com>
Date:	Thu, 2 Jul 2009 15:36:41 +0800
From:	Changli Gao <xiaosuo@...il.com>
To:	Linus Torvalds <torvalds@...ux-foundation.org>
Cc:	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: PROPOSAL: extend pipe() to support NULL argument.

Linux also uses pipes as references of kernel buffers. In that case,
only one RW file descriptor will be enough, instead of inventing a new
system call, I think extending the existing pipe() is a better idea.
If pipe is passed with a NULL pointer, one RW file descriptor is
returned. I have checkd the other architectures except of x86, it
seems that not all of the platforms implement this system call with
the prototype: int pipe(int fd[2]); and changing glibc is needed. Is
it possible to extend pipe() in this way?

-- 
Regards，
Changli Gao(xiaosuo@...il.com)
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