make hdmi toggle persist

server/utils/hdmi.go

@@ -0,0 +1,38 @@
+package utils
+
+import (
+	"os"
+
+	log "github.com/sirupsen/logrus"
+)
+
+const (
+	HDMIDisableFile = "/etc/kvm/hdmi_disable"
+)
+
+func PersistHDMIDisabled() {
+	f, err := os.OpenFile(HDMIDisableFile, os.O_CREATE|os.O_RDONLY, 0644)
+	if err != nil {
+		log.Error("failed to create hdmi disable file:", err)
+		return
+	}
+	f.Close()
+}
+
+func PersistHDMIEnabled() {
+	if err := os.Remove(HDMIDisableFile); err != nil {
+		log.Error("failed to remove hdmi disable file:", err)
+		return
+	}
+}
+
+func IsHdmiDisabled() bool {
+	if _, err := os.Stat(HDMIDisableFile); err != nil {
+		if os.IsNotExist(err) {
+			return false // HDMI is enabled
+		}
+		log.Error("failed to check hdmi disable file:", err)
+		return false // Assume HDMI is enabled on error
+	}
+	return true // HDMI is disabled
+}