From 1f75fb6b6b15bdefda72dfbf1a2b43c19c776bd2 Mon Sep 17 00:00:00 2001
From: Cao Mingjun <me@caomingjun.com>
Date: Mon, 9 Dec 2024 16:22:15 +0800
Subject: [PATCH] add legacy tun support for docker swarm

---
 entrypoint.sh | 11 +++++++++--
 1 file changed, 9 insertions(+), 2 deletions(-)

diff --git a/entrypoint.sh b/entrypoint.sh
index bda66bb..9c3cbce 100755
--- a/entrypoint.sh
+++ b/entrypoint.sh
@@ -5,8 +5,15 @@ set -e
 
 # check if /dev/net/tun is available
 if [ ! -e /dev/net/tun ]; then
-    echo "CRITIC: /dev/net/tun not pass, check https://github.com/cmj2002/warp-docker/blob/main/docs/tun-not-permitted.md for more information"
-    exit 1
+    if [ -n "$LEGACY_TUN_SUPPORT" ]; then
+        echo "WARN: LEGACY_TUN_SUPPORT enabled, creating /dev/net/tun..."
+        sudo mkdir -p /dev/net
+        sudo mknod /dev/net/tun c 10 200
+        sudo chmod 600 /dev/net/tun
+    else
+        echo "CRITIC: /dev/net/tun not pass, check https://github.com/cmj2002/warp-docker/blob/main/docs/tun-not-permitted.md for more information"
+        exit 1
+    fi
 fi
 
 # start dbus