linux-kernel - Re: [PATCH 2/2] cgroups: fix cgroup_event

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Message-ID: <50EBBC9C.7060909@huawei.com>
Date:	Tue, 8 Jan 2013 14:28:44 +0800
From:	Li Zefan <lizefan@...wei.com>
To:	Greg Thelen <gthelen@...gle.com>
CC:	Tejun Heo <tj@...nel.org>, <containers@...ts.linux-foundation.org>,
	<cgroups@...r.kernel.org>, <linux-doc@...r.kernel.org>,
	<linux-kernel@...r.kernel.org>
Subject: Re: [PATCH 2/2] cgroups: fix cgroup_event_listener error handling

> cgroups: fix cgroup_event_listener error handling
> 
> The error handling in cgroup_event_listener.c did not correctly deal
> with either an error opening either <control_file> or
> cgroup.event_control.  Due to an uninitialized variable the program
> exit code was undefined if either of these opens failed.
> 
> This patch simplifies and corrects cgroup_event_listener.c error
> handling by:
> 1. using err*() rather than printf(),exit()
> 2. depending on process exit to close open files
> 
> With this patch failures always return non-zero error.
> 
> Signed-off-by: Greg Thelen <gthelen@...gle.com>

Acked-by: Li Zefan <lizefan@...wei.com>

> ---
>  tools/cgroup/cgroup_event_listener.c |   72 ++++++++++-----------------------
>  1 files changed, 22 insertions(+), 50 deletions(-)

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