From 27a62a0fd107ff14537b3c9100583acf554f2297 Mon Sep 17 00:00:00 2001
From: jt-holdcraft <133894727+jt-holdcraft@users.noreply.github.com>
Date: Wed, 17 May 2023 17:55:42 +0200
Subject: [PATCH] main.cpp: fix device detection

---
 main.cpp | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/main.cpp b/main.cpp
index 65cd8ab..857b055 100644
--- a/main.cpp
+++ b/main.cpp
@@ -112,7 +112,8 @@ int main(int argc, char **argv)
 		switch (c) {
 		case 'd':
 			deviceindex=strtol(optarg,NULL,10);
-			if (errno==EINVAL || errno==ERANGE) {
+			if (errno==EINVAL || errno==ERANGE ||
+			   strlen(optarg) > 4 || !strcmp(optarg,"?")) {  // Serialnumber
 				deviceindex=sdr::search_device(optarg);
 			}
 			break;