linux-kernel - Re: [PATCH]exit.c: support larger exit code

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Message-ID: <AANLkTimHd3xLE0avkmoaeYngYQ7Ueob9r-DUEXm4-rbW@mail.gmail.com>
Date:	Wed, 25 Aug 2010 15:23:07 -0700
From:	Tony Luck <tony.luck@...il.com>
To:	Andrew Morton <akpm@...ux-foundation.org>
Cc:	Oleg Nesterov <oleg@...hat.com>,
	"Zhang, Wei-Jovi (NSN - CN/Hangzhou)" <wei-jovi.zhang@....com>,
	mingo@...e.hu, peterz@...radead.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH]exit.c: support larger exit code

On Wed, Aug 25, 2010 at 2:49 PM, Andrew Morton
<akpm@...ux-foundation.org> wrote:
> There are back-compatibility issues.

Also standards conformance issues. Posix says this about exit():

"The value of status may be 0, EXIT_SUCCESS, EXIT_FAILURE, [CX]   or
any other value, though only the least significant 8 bits (that is,
status & 0377) shall be available to a waiting parent process."

Full reference here:
http://www.opengroup.org/onlinepubs/000095399/functions/exit.html

-Tony
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