feat: add Synology support

Signed-off-by: JohnsonRan <me@ihtw.moe>

monitoring/unit/os_linux.go

@@ -10,6 +10,10 @@ import (
 )
 
 func OSName() string {
+	if synologyName := detectSynology(); synologyName != "" {
+		return synologyName
+	}
+	
 	file, err := os.Open("/etc/os-release")
 	if err != nil {
 		return "Linux"
@@ -30,3 +34,64 @@ func OSName() string {
 
 	return "Linux"
 }
+
+func detectSynology() string {
+	synologyFiles := []string{
+		"/etc/synoinfo.conf",
+		"/etc.defaults/synoinfo.conf",
+	}
+	
+	for _, file := range synologyFiles {
+		if info, err := os.Stat(file); err == nil && !info.IsDir() {
+			if synologyInfo := readSynologyInfo(file); synologyInfo != "" {
+				return synologyInfo
+			}
+		}
+	}
+	
+	if info, err := os.Stat("/usr/syno"); err == nil && info.IsDir() {
+		return "Synology DSM"
+	}
+	
+	return ""
+}
+
+func readSynologyInfo(filename string) string {
+	file, err := os.Open(filename)
+	if err != nil {
+		return ""
+	}
+	defer file.Close()
+	
+	var unique, udcCheckState string
+	
+	scanner := bufio.NewScanner(file)
+	for scanner.Scan() {
+		line := strings.TrimSpace(scanner.Text())
+		
+		if strings.HasPrefix(line, "unique=") {
+			unique = strings.Trim(strings.TrimPrefix(line, "unique="), `"`)
+		} else if strings.HasPrefix(line, "udc_check_state=") {
+			udcCheckState = strings.Trim(strings.TrimPrefix(line, "udc_check_state="), `"`)
+		}
+	}
+	
+	if unique != "" && strings.Contains(unique, "synology_") {
+		parts := strings.Split(unique, "_")
+		if len(parts) >= 3 {
+			model := strings.ToUpper(parts[len(parts)-1])
+			
+			result := "Synology " + model
+			
+			if udcCheckState != "" {
+				result += " DSM " + udcCheckState
+			} else {
+				result += " DSM"
+			}
+			
+			return result
+		}
+	}
+	
+	return ""
+}