Fix a bug that getProcessList returns garbage when cgroup is empty

Signed-off-by: Sungbae Yoo <sungbae.yoo@samsung.com>
Change-Id: Ia4830daaa55cbc6b2da38673c8abdb309bb4cebf

diff --git a/src/cgroup.cpp b/src/cgroup.cpp
index a4b6acabb20077a6b81666f47face3ca948d4acd..d136e7deb3d9397a3a5086a4fa689e24d1cfb55b 100644 (file)
--- a/src/cgroup.cpp
+++ b/src/cgroup.cpp
@@ -183,10 +183,13 @@ std::vector<pid_t> Cgroup::getProcessList(const std::string& subsystem, const st
        std::ifstream ifs("/sys/fs/cgroup/" + subsystem + "/" + path +
                                                "/tasks");
 
+       pid_t pid;
+
+       ifs >> pid;
+
        while (ifs.good()) {
-               pid_t pid;
-               ifs >> pid;
                ret.push_back(pid);
+               ifs >> pid;
        }
 
        return ret;