Fix compiler warnings

src/container_manager.cpp

@@ -275,7 +275,7 @@ void Container_manager::create_root_cgroups()
 
 void Container_manager::migrate_service_os()
 {
-	system("for t in `cat /sys/fs/cgroup/cpuset/tasks`; do /bin/echo $t > /sys/fs/cgroup/cpuset/argo/service_os/tasks; done 2>/dev/null");
+	int n = system("for t in `cat /sys/fs/cgroup/cpuset/tasks`; do /bin/echo $t > /sys/fs/cgroup/cpuset/argo/service_os/tasks; done 2>/dev/null");
 	return;
 	vector<int> sos_tasks;
 	retrieve_from_file<int>( _cgroup_root + "cpuset/tasks",
@@ -375,6 +375,9 @@ void Container_manager::load_existing_containers_as_root()
 
 
 Container_manager::~Container_manager()
+#if __cplusplus >= 201103L
+    noexcept(false)
+#endif
 {
 	std::ofstream ownership_map_file;
 	ownership_map_file.open(OWNERSHIP_MAP);
@@ -853,7 +856,7 @@ void Container_manager::reset()
 	clean_config("");
 	
 	/*Temporary ugly brutal hack [JZ] (\_/)*/
-	system("rmdir /sys/fs/cgroup/cpuset/argo/argo_containers/ && rmdir /sys/fs/cgroup/cpuset/argo/");
+	int n = system("rmdir /sys/fs/cgroup/cpuset/argo/argo_containers/ && rmdir /sys/fs/cgroup/cpuset/argo/");
 }
 
 void Container_manager::attach_to_container(string command)

src/container_manager.hpp

@@ -223,7 +223,11 @@ class Container_manager
 		Container_manager(ILogger* logger, 
 				Error_behavior error_behavior,
 				string cgroup_root = DEFAULT_CGROUP_ROOT);
-		~Container_manager();
+		~Container_manager()
+#if __cplusplus >= 201103L
+		noexcept(false)
+#endif
+		;
 
 		inline const string* const get_argo_argo_container_root() const {return &_cgroup_root;}
 		inline Error_behavior get_error_behaviour()const {return _error_behavior;}

src/syslogger.cpp

@@ -39,5 +39,5 @@ void Syslogger::log(Log_type type, const string& message, int errnum)
 {
 	string msg_out;
 	if(prepare_log(type, message, msg_out, errnum))
-		syslog(log_type_to_priority(type), msg_out.c_str());
+		syslog(log_type_to_priority(type), "%s", msg_out.c_str());
 }