From: Greg Thelen <gthelen@google.com>
Date: Mon, 7 Jan 2013 19:50:17 +0000 (-0800)
Subject: cgroups: fix cgroup_event_listener error handling
X-Git-Tag: v3.9-rc1~157^2~15
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=799105d514384b80cbe3182dbcb4ed30aa07e1f5;p=pandora-kernel.git

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@google.com>
Acked-by: Li Zefan <lizefan@huawei.com>
Signed-off-by: Tejun Heo <tj@kernel.org>
---

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