control agent can now uboot commands

clitools/pkg/controller/osupgrade/bootenv.go

@@ -0,0 +1,37 @@
+package osupgrade
+
+import (
+	"context"
+	"fmt"
+	"os/exec"
+)
+
+type NextBootConfig struct {
+	Key   string
+	Value string
+}
+
+func SetNextBootEnv(ctx context.Context, cfg NextBootConfig) error {
+	if cfg.Key == "" {
+		return fmt.Errorf("boot env key is empty")
+	}
+	if cfg.Value == "" {
+		return fmt.Errorf("boot env value is empty")
+	}
+
+	cmd := exec.CommandContext(
+		ctx,
+		"/proc/self/exe",
+		"internal",
+		"fw-setenv",
+		"--key", cfg.Key,
+		"--value", cfg.Value,
+	)
+
+	out, err := cmd.CombinedOutput()
+	if err != nil {
+		return fmt.Errorf("invoke internal fw-setenv: %w: %s", err, string(out))
+	}
+
+	return nil
+}