libcgroup: Ensure null is returned if cgroup does not exist in cgroup_get_cgroup()

Signed-off-by: Dhaval Giani <dhaval@linux.vnet.ibm.com>



git-svn-id: https://libcg.svn.sourceforge.net/svnroot/libcg/trunk@143 4f4bb910-9a46-0410-90c8-c897d4f1cd53

1 files changed, 4 insertions, 0 deletions

diff --git a/api.c b/api.c
index 68eea8a..a6918a8 100644
--- a/api.c
+++ b/api.c
@@ -891,6 +891,10 @@ struct cgroup *cgroup_get_cgroup(struct cgroup *cgroup)
 		}
 		closedir(dir);
 	}
+	/* Check if the group really exists or not */
+	if (!cgroup->index)
+		goto unlock_error;
+
 	pthread_rwlock_unlock(&cg_mount_table_lock);
 	return cgroup;