linux-kernel - Re: [RFC] teach argv_split() to ignore the spaces surrounded by \e

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Message-ID: <20130513171329.GA21906@redhat.com>
Date:	Mon, 13 May 2013 19:13:29 +0200
From:	Oleg Nesterov <oleg@...hat.com>
To:	Colin Walters <walters@...bum.org>
Cc:	Lucas De Marchi <lucas.de.marchi@...il.com>,
	lkml <linux-kernel@...r.kernel.org>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Rusty Russell <rusty@...tcorp.com.au>,
	Andi Kleen <andi@...stfloor.org>,
	Neil Horman <nhorman@...driver.com>,
	Lennart Poettering <mzxreary@...inter.de>,
	Denys Vlasenko <vda.linux@...glemail.com>
Subject: Re: [RFC] teach argv_split() to ignore the spaces surrounded by \e

On 05/13, Colin Walters wrote:
>
> On Mon, 2013-05-13 at 16:35 +0200, Oleg Nesterov wrote:
>
> > Yes, we can change format_corename() to construct "argv" by hand, and
> > this was my iniital plan. But perhaps it would be better to not uglify
> > this code even more?
>
> Sure this \e is less code, but it seems pretty ugly to me.

Yes, I am not proud of this idea. But it is simple.

> Maybe a way
> to keep fs/coredump.c sane would be always constructing an argv, and
> then in the !ispipe case just join them into one string.

I don't think we should construct an argv if !ispipe, but this is minor.
The patch should be simple anyway. Just I do not want to touch this code ;)
and to complicate it more. and create another (2nd) case when when we need
to construct argv by hand.

> Though I'm still inclined to change systemd to read /proc/pid/cmdline
> like abrt does; that way it works on current kernels too.

Oh, I will be really happy to leave this this code alone and do nothing ;)

except format_corename() has another bug, it can leak ->corename but this
is another story (I'll send the patch).

Oleg.

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