Handling Pausing from freezer state

Signed-off-by: Rajasekaran <[email protected]>

Author: rajasec

libcontainer/container_linux.go

@@ -781,8 +781,17 @@ func (c *linuxContainer) currentStatus() (Status, error) {
 		}
 		return 0, newSystemError(err)
 	}
-	if c.config.Cgroups != nil && c.config.Cgroups.Freezer == configs.Frozen {
-		return Paused, nil
+	path := c.cgroupManager.GetPaths()["freezer"]
+	// Read file only if freezer subsystem exists, in some of the local unit test freezer subsystem is not passed in container creation
+	if path != "" {
+		contents, err := ioutil.ReadFile(filepath.Join(path, "freezer.state"))
+		if err != nil {
+			return 0, newSystemError(err)
+		}
+		freezerstate := string(contents)
+		if strings.TrimSpace(freezerstate) == "FROZEN" {
+			return Paused, nil
+		}
 	}
 	return Running, nil
 }