Fix bug that caused auto even though only a single device expected, like: rtlwmbus[1234]

src/config.cc

@@ -224,6 +224,11 @@ bool handleDevice(Configuration *c, string devicefile)
 {
     SpecifiedDevice specified_device;
     bool ok = specified_device.parse(devicefile);
+    if (!ok && SpecifiedDevice::isLikelyDevice(devicefile))
+    {
+        error("Not a valid device \"%s\"\n", devicefile.c_str());
+    }
+
     if (ok)
     {
         // Number the devices

src/main.cc

@@ -889,8 +889,12 @@ void perform_auto_scan_of_serial_devices(Configuration *config)
             {
                 // See if we had a specified device without a file,
                 // that matches this detected device.
-                find_specified_device_and_update_detected(config, &detected);
-                open_wmbus_device_and_set_linkmodes(config, "auto", &detected);
+                bool found = find_specified_device_and_update_detected(config, &detected);
+                if (config->use_auto_device_detect || found)
+                {
+                    // Open the device, only if auto is enabled, or if the device was specified.
+                    open_wmbus_device_and_set_linkmodes(config, found?"config":"auto", &detected);
+                }
             }
             else
             {
@@ -937,8 +941,12 @@ void perform_auto_scan_of_swradio_devices(Configuration *config)
             {
                 // Use the serialnr as the id.
                 detected.found_device_id = serialnr;
-                find_specified_device_and_update_detected(config, &detected);
-                open_wmbus_device_and_set_linkmodes(config, "auto", &detected);
+                bool found = find_specified_device_and_update_detected(config, &detected);
+                if (config->use_auto_device_detect || found)
+                {
+                    // Open the device, only if auto is enabled, or if the device was specified.
+                    open_wmbus_device_and_set_linkmodes(config, found?"config":"auto", &detected);
+                }
             }
         }
     }

src/wmbus.cc

@@ -4105,6 +4105,14 @@ string SpecifiedDevice::str()
     return r;
 }
 
+bool SpecifiedDevice::isLikelyDevice(string &arg)
+{
+    // Only devices are allowed to contain colons.
+    // Devices usually contain a colon!
+    if (arg.find(":") != string::npos) return true;
+    return false;
+}
+
 bool SpecifiedDevice::parse(string &arg)
 {
     clear();

src/wmbus.h

@@ -164,6 +164,7 @@ struct SpecifiedDevice
     void clear();
     string str();
     bool parse(string &s);
+    static bool isLikelyDevice(string &s);
 };
 
 struct Detected