From c9e3ba052a34741aa000dca6943dd82ecc5edb86 Mon Sep 17 00:00:00 2001
From: Dieter Lang <info@lang-diter.de>
Date: Sat, 22 Aug 2026 16:24:15 +0200
Subject: [PATCH] =?UTF-8?q?Linux-PTY-R=C3=BCckweg=20und=20plattformabh?=
 =?UTF-8?q?=C3=A4ngige=20Porttests=20erg=C3=A4nzen?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

---
 configs/client.json            |  2 +-
 internal/client/pty_linux.go   | 25 ++++++++++++++++++++++++-
 internal/config/config_test.go | 14 +++++++++++---
 3 files changed, 36 insertions(+), 5 deletions(-)

diff --git a/configs/client.json b/configs/client.json
index 69af052..5983adf 100644
--- a/configs/client.json
+++ b/configs/client.json
@@ -9,7 +9,7 @@
     },
     "virtual_ports": [
         {
-            "port": "COM100",
+            "port": "/dev/ttyUSB100",
             "remote_device": "rotor",
 			"startup_bytes": "57 00 00 00 00 00 00 00 00 00 00 1F 20"
         }
diff --git a/internal/client/pty_linux.go b/internal/client/pty_linux.go
index a07eca4..709a4b2 100644
--- a/internal/client/pty_linux.go
+++ b/internal/client/pty_linux.go
@@ -205,7 +205,30 @@ func (p *ptySerial) Write(b []byte) (int, error) {
 		return 0, fmt.Errorf("PTY master is closed")
 	}
 
-	return unix.Write(fd, b)
+	fmt.Printf(
+		"PTY TX [%s]: % X\n",
+		p.path,
+		b,
+	)
+
+	n, err := unix.Write(fd, b)
+
+	if err != nil {
+		fmt.Printf(
+			"PTY TX Fehler [%s]: %v\n",
+			p.path,
+			err,
+		)
+		return n, err
+	}
+
+	fmt.Printf(
+		"PTY TX erfolgreich [%s]: %d Bytes\n",
+		p.path,
+		n,
+	)
+
+	return n, nil
 }
 
 // Close closes the PTY master and slave.
diff --git a/internal/config/config_test.go b/internal/config/config_test.go
index 523fef9..8cc3587 100644
--- a/internal/config/config_test.go
+++ b/internal/config/config_test.go
@@ -8,11 +8,13 @@ package config_test
 
 import (
 	"encoding/json"
-	"git.lang-dieter.de/rs2322tcp/internal/config"
 	"os"
 	"path/filepath"
+	"runtime"
 	"strings"
 	"testing"
+
+	"git.lang-dieter.de/rs2322tcp/internal/config"
 )
 
 ///////////////////////////////////////////////////////////////////////////////
@@ -485,13 +487,19 @@ func TestExampleClientConfig(t *testing.T) {
 		)
 	}
 
+	expectedPort := "COM100"
+
+	if runtime.GOOS == "linux" {
+		expectedPort = "/dev/ttyUSB100"
+	}
+
 	port := cfg.VirtualPorts[0]
 
-	if port.Port != "COM100" {
+	if port.Port != expectedPort {
 		t.Errorf(
 			"VirtualPorts[0].Port = %q, want %q",
 			port.Port,
-			"COM100",
+			expectedPort,
 		)
 	}