1 files changed, 34 insertions, 0 deletions
diff --git a/pkg/util/utils_supported.go b/pkg/util/utils_supported.go
index af5e67fc1..3d9140a23 100644
--- a/pkg/util/utils_supported.go
+++ b/pkg/util/utils_supported.go
@@ -11,9 +11,33 @@ import (
 	"github.com/pkg/errors"
 	"os"
 	"path/filepath"
+	"sync"
 	"syscall"
 )
 
+const (
+	_cgroup2SuperMagic = 0x63677270
+)
+
+var (
+	isUnifiedOnce sync.Once
+	isUnified     bool
+	isUnifiedErr  error
+)
+
+// IsCgroup2UnifiedMode returns whether we are running in cgroup 2 unified mode.
+func IsCgroup2UnifiedMode() (bool, error) {
+	isUnifiedOnce.Do(func() {
+		var st syscall.Statfs_t
+		if err := syscall.Statfs("/sys/fs/cgroup", &st); err != nil {
+			isUnified, isUnifiedErr = false, err
+		} else {
+			isUnified, isUnifiedErr = st.Type == _cgroup2SuperMagic, nil
+		}
+	})
+	return isUnified, isUnifiedErr
+}
+
 // GetRootlessRuntimeDir returns the runtime directory when running as non root
 func GetRootlessRuntimeDir() (string, error) {
 	var rootlessRuntimeDirError error
@@ -58,3 +82,13 @@ func GetRootlessRuntimeDir() (string, error) {
 	}
 	return rootlessRuntimeDir, nil
 }
+
+// GetRootlessPauseProcessPidPath returns the path to the file that holds the pid for
+// the pause process
+func GetRootlessPauseProcessPidPath() (string, error) {
+	runtimeDir, err := GetRootlessRuntimeDir()
+	if err != nil {
+		return "", err
+	}
+	return filepath.Join(runtimeDir, "libpod", "pause.pid"), nil
+}