New scripts

server/main.go

@@ -56,6 +56,21 @@ func loadConfig(path string) (*Config, error) {
 	if err := dec.Decode(&cfg); err != nil {
 		return nil, fmt.Errorf("parse %s: %w", path, err)
 	}
+	seen := map[string]bool{} // item names are global keys (monVals, RunScript)
+	for _, l := range cfg.Links {
+		if seen[l.Name] {
+			return nil, fmt.Errorf("duplicate name %q", l.Name)
+		}
+		seen[l.Name] = true
+	}
+	for _, list := range [][]Item{cfg.Monitor, cfg.Exec} {
+		for _, it := range list {
+			if seen[it.Name] {
+				return nil, fmt.Errorf("duplicate name %q", it.Name)
+			}
+			seen[it.Name] = true
+		}
+	}
 	for _, it := range cfg.Monitor {
 		if it.Refresh <= 0 {
 			return nil, fmt.Errorf("monitor %q: refresh must be > 0", it.Name)
@@ -109,7 +124,8 @@ func (s *server) startMonitors() {
 					log.Printf("monitor %s: %v", sc.Name, err)
 					v = "error: " + err.Error()
 				} else {
-					log.Printf("monitor %s -> %s", sc.Name, strings.TrimSpace(v))
+					v = strings.TrimSpace(v)
+					log.Printf("monitor %s -> %s", sc.Name, v)
 				}
 				s.monVals.Store(sc.Name, v)
 				time.Sleep(time.Duration(sc.Refresh) * time.Second)