Allow . to be specified on stdin as well

cmd/ctwatch/main.go

@@ -18,9 +18,15 @@ var watchDomainSuffixes []string
 
 func setWatchDomains (domains []string) {
 	for _, domain := range domains {
+		if domain == "." { // "." as in root zone (matches everything)
+			watchDomains = []string{}
+			watchDomainSuffixes = []string{""}
+			break
+		} else {
 			watchDomains = append(watchDomains, strings.ToLower(domain))
 			watchDomainSuffixes = append(watchDomainSuffixes, "." + strings.ToLower(domain))
 		}
+	}
 }
 
 func dnsNameMatches (dnsName string) bool {
@@ -97,8 +103,6 @@ func main() {
 			os.Exit(3)
 		}
 		setWatchDomains(domains)
-	} else if flag.NArg() == 1 && flag.Arg(0) == "." { // "." as in root zone
-		watchDomainSuffixes = []string{""}
 	} else {
 		setWatchDomains(flag.Args())
 	}