Merge pull request #1599 from tklauser/unconvert

libcontainer: remove unnecessary type conversions

Author: dqminh

libcontainer/container_linux.go

@@ -670,9 +670,9 @@ func parseCriuVersion(path string) (int, error) {
 			return 0, fmt.Errorf("Unable to parse the CRIU version: %s", path)
 		}
 
-		n, err := fmt.Sscanf(string(version), "GitID: v%d.%d.%d", &x, &y, &z) // 1.5.2
+		n, err := fmt.Sscanf(version, "GitID: v%d.%d.%d", &x, &y, &z) // 1.5.2
 		if err != nil {
-			n, err = fmt.Sscanf(string(version), "GitID: v%d.%d", &x, &y) // 1.6
+			n, err = fmt.Sscanf(version, "GitID: v%d.%d", &x, &y) // 1.6
 			y++
 		} else {
 			z++

libcontainer/init_linux.go

@@ -260,10 +260,10 @@ func setupUser(config *initConfig) error {
 
 	// Rather than just erroring out later in setuid(2) and setgid(2), check
 	// that the user is mapped here.
-	if _, err := config.Config.HostUID(int(execUser.Uid)); err != nil {
+	if _, err := config.Config.HostUID(execUser.Uid); err != nil {
 		return fmt.Errorf("cannot set uid to unmapped user in user namespace")
 	}
-	if _, err := config.Config.HostGID(int(execUser.Gid)); err != nil {
+	if _, err := config.Config.HostGID(execUser.Gid); err != nil {
 		return fmt.Errorf("cannot set gid to unmapped user in user namespace")
 	}
 

libcontainer/keys/keyctl.go

@@ -29,7 +29,7 @@ func ModKeyringPerm(ringId KeySerial, mask, setbits uint32) error {
 		return err
 	}
 
-	res := strings.Split(string(dest), ";")
+	res := strings.Split(dest, ";")
 	if len(res) < 5 {
 		return fmt.Errorf("Destination buffer for key description is too small")
 	}