several improvements

- drop vfs
 - less hardcoded stuff, use the runtime status
 - Remove things that syscalls dont understand (defaults, auto)

Signed-off-by: Itxaka <itxaka@spectrocloud.com>

internal/utils/common.go

@@ -2,10 +2,11 @@ package utils
 
 import (
 	"github.com/kairos-io/kairos/sdk/state"
-	"github.com/twpayne/go-vfs"
+	"os"
+	"strings"
 )
 
-func BootedFromCD(fs vfs.FS) (bool, error) {
+func BootedFromCD() (bool, error) {
 	runtime, err := state.NewRuntime()
 	if err != nil {
 		return false, err
@@ -13,3 +14,48 @@ func BootedFromCD(fs vfs.FS) (bool, error) {
 
 	return runtime.BootState == state.LiveCD, nil
 }
+
+func BootStateToLabel() string {
+	runtime, err := state.NewRuntime()
+	if err != nil {
+		return ""
+	}
+	switch runtime.BootState {
+	case "active_boot":
+		return "COS_ACTIVE"
+	case "passive_boot":
+		return "COS_PASSIVE"
+	case "recovery_boot":
+		return "COS_RECOVERY"
+	default:
+		return ""
+	}
+}
+
+func BootStateToImage() string {
+	runtime, err := state.NewRuntime()
+	if err != nil {
+		return ""
+	}
+	switch runtime.BootState {
+	case "active_boot":
+		return "/cOS/active.img"
+	case "passive_boot":
+		return "/cOS/passive.img"
+	case "recovery_boot":
+		return "/recovery.img"
+	default:
+		return ""
+	}
+}
+
+func GetRootDir() string {
+	cmdline, _ := os.ReadFile("/proc/cmdline")
+	switch {
+	case strings.Contains(string(cmdline), "IMMUCORE_NOPIVOT"):
+		return "/"
+	default:
+		// Default is sysroot for normal no-pivot boot
+		return "/sysroot"
+	}
+}