linux-kernel - Re: [Feature Request?] Inline compression of process core dumps

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Message-ID: <461EE95A.3090600@theshore.net>
Date:	Thu, 12 Apr 2007 22:22:18 -0400
From:	"Christopher S. Aker" <caker@...shore.net>
To:	Andi Kleen <andi@...stfloor.org>
CC:	"Bill Rugolsky Jr." <brugolsky@...emetry-investments.com>,
	Alan Cox <alan@...rguk.ukuu.org.uk>,
	linux-kernel@...r.kernel.org
Subject: Re: [Feature Request?] Inline compression of process core dumps

Alan Cox wrote:
 > Indeed. So useful that in current kernels you can set the core dump
 > path to be
 >
 > 	"|application"

Cool stuff!  However, it's not working (2.6.20.6):

	Core dump to |/home/caker/bin/dumper.pl.4442 pipe failed

even though...

	# cat /proc/sys/kernel/core_uses_pid
	0
	# cat /proc/sys/kernel/core_pattern
	|/home/caker/bin/dumper.pl

Looking at the code, it seems to me that format_corename() is appending 
.pid, regardless if !core_uses_pid and corename[0]=='|', in which case 
it creates an invalid path for call_usermodehelper_pipe().

Bug in the code, or bug in my methods?

-Chris
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