Bump dependency opencontainers/runc@v1.0.0-rc10

vendor/github.com/opencontainers/runc/libcontainer/cgroups/fs2/freezer.go

@@ -0,0 +1,53 @@
+// +build linux
+
+package fs2
+
+import (
+	"strconv"
+	"strings"
+
+	"github.com/opencontainers/runc/libcontainer/cgroups/fscommon"
+	"github.com/opencontainers/runc/libcontainer/configs"
+	"github.com/pkg/errors"
+)
+
+func setFreezer(dirPath string, state configs.FreezerState) error {
+	var desired int
+	switch state {
+	case configs.Undefined:
+		return nil
+	case configs.Frozen:
+		desired = 1
+	case configs.Thawed:
+		desired = 0
+	default:
+		return errors.Errorf("unknown freezer state %+v", state)
+	}
+	supportedErr := supportsFreezer(dirPath)
+	if supportedErr != nil && desired != 0 {
+		// can ignore error if desired == 1
+		return errors.Wrap(supportedErr, "freezer not supported")
+	}
+	return freezeWithInt(dirPath, desired)
+}
+
+func supportsFreezer(dirPath string) error {
+	_, err := fscommon.ReadFile(dirPath, "cgroup.freeze")
+	return err
+}
+
+// freeze writes desired int to "cgroup.freeze".
+func freezeWithInt(dirPath string, desired int) error {
+	desiredS := strconv.Itoa(desired)
+	if err := fscommon.WriteFile(dirPath, "cgroup.freeze", desiredS); err != nil {
+		return err
+	}
+	got, err := fscommon.ReadFile(dirPath, "cgroup.freeze")
+	if err != nil {
+		return err
+	}
+	if gotS := strings.TrimSpace(string(got)); gotS != desiredS {
+		return errors.Errorf("expected \"cgroup.freeze\" in %q to be %q, got %q", dirPath, desiredS, gotS)
+	}
+	return nil
+}