From ca5634679c8586f9ebb4a2ec64f11199323b5785 Mon Sep 17 00:00:00 2001
From: "Tristan B. Kildaire" <deavmi@redxen.eu>
Date: Sun, 18 Jul 2021 19:26:15 +0200
Subject: [PATCH] Throw exception on failure to create tun device

---
 source/libtun/adapter.d | 18 +++++++++++++-----
 1 file changed, 13 insertions(+), 5 deletions(-)

diff --git a/source/libtun/adapter.d b/source/libtun/adapter.d
index 0d8be08..16d3498 100644
--- a/source/libtun/adapter.d
+++ b/source/libtun/adapter.d
@@ -4,7 +4,7 @@ extern (C) int ioctl(int fd, ulong request, void* data);
 extern (C) int open(char* path, int flags);
 
 import std.stdio;
-import core.stdc.stdio;
+
 
 /**
 * TUN maintenance routines in `test.c`
@@ -22,10 +22,10 @@ public class TUNAdapter
     private void init()
     {
         int tunFD = createTun(cast(char*)"dd", 1);
-        writeln(tunFD);
-        writeln();
-        writeln(destroyTun(1));
-        ioctl(0,0,cast(void*)0);
+        if(tunFD < 0)
+        {
+            throw new TUNException("Error creating tun device");
+        }
     }
 
     public void receive(byte[] buffer)
@@ -37,4 +37,12 @@ public class TUNAdapter
     {
 
     }
+}
+
+public final class TUNException : Exception
+{
+    this(string msg)
+    {
+        super(msg);
+    }
 }
\ No newline at end of file