From: Ivana Hutarova Varekova <varekova@redhat.com>
Date: Tue, 10 Aug 2010 07:59:00 +0000 (+0530)
Subject: add the return value check in lssubsys II
X-Git-Tag: v0.37.1~53^2~3
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=54446f91b6be1c131c8c52627023bf7e81d52c52;p=thirdparty%2Flibcgroup.git

add the return value check in lssubsys II

This patch add one return value check for lssubsys

Signed-off-by: Ivana Hutarova Varekova <varekova@redhat.com>
Acked-By: Jan Safranek <jsafrane@redhat.com>
Signed-off-by: Balbir Singh <balbir@linux.vnet.ibm.com>
---

diff --git a/src/tools/lssubsys.c b/src/tools/lssubsys.c
index 89d02290..e48daa6c 100644
--- a/src/tools/lssubsys.c
+++ b/src/tools/lssubsys.c
@@ -195,6 +195,11 @@ static int print_all_controllers_in_hierarchy(const char *tname,
 	}
 
 	ret = cgroup_get_all_controller_begin(&handle, &info);
+	if ((ret != 0) && (ret != ECGEOF)) {
+		fprintf(stderr, "cannot read controller data: %s\n",
+			cgroup_strerror(ret));
+		return ret;
+	}
 
 	while (ret != ECGEOF) {
 		/* controller is in the hierrachy */