linux-kernel - [OT]Re: NAK (bashizm in the /bin/sh script): [PATCH v3] doc/oops-tracing: add Code: decode info

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Message-ID: <20070623135119.GO19904@flower.upol.cz>
Date:	Sat, 23 Jun 2007 15:51:19 +0200
From:	Oleg Verych <olecom@...wer.upol.cz>
To:	Willy Tarreau <w@....eu>
Cc:	Andi Kleen <ak@...e.de>, Arkadiusz Miskiewicz <arekm@...en.pl>,
	Randy Dunlap <randy.dunlap@...cle.com>,
	lkml <linux-kernel@...r.kernel.org>, akpm@...ux-foundation.org
Subject: [OT]Re: NAK (bashizm in the /bin/sh script): [PATCH v3] doc/oops-tracing: add Code: decode info

On Sat, Jun 23, 2007 at 03:26:26PM +0200, Willy Tarreau wrote:
> On Sat, Jun 23, 2007 at 03:17:27PM +0200, Andi Kleen wrote:
> > On Saturday 23 June 2007 13:09, Arkadiusz Miskiewicz wrote:
> > > On Saturday 23 of June 2007, Andi Kleen wrote:
> > > > Here's a nickel. Get yourself a real shell.
> > >
> > > POSIX compilant shell isn't real shell?
> > 
> > In this case it's not good enough. We're not writing POSIX portable software 
> > here, but Linux software where /bin/sh is /bin/bash. Similar to the Linux 
> > kernel which is not written in portable ISO C.

I disagree.

> Well, it can also be zsh or pdksh, but I suspect that the code is valid on
> them too.

Not for the latter:
|-*- pdksh -*-
flower:-$ <kernelOops.txt>/dev/null pdksh decodecode
decodecode[40]: : bad substitution
flower:-$
|-*-

I don't want to go further with this OT, just last thing.

It's GNU BaSH *BUG* (addition to being big and slow), if it can't switch
off it's expressly undocumented extentions while run as `/bin/sh'.
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