From 14fb71b16c507ee1e80941e2dbc2f42dd0f724c0 Mon Sep 17 00:00:00 2001
From: Maxime Coste <mawww@kakoune.org>
Date: Thu, 6 Jun 2019 17:37:57 +1000
Subject: [PATCH] Refuse to overwrite an existing session socket

---
 src/remote.cc | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/src/remote.cc b/src/remote.cc
index 684d99ea..f4123c81 100644
--- a/src/remote.cc
+++ b/src/remote.cc
@@ -823,6 +823,9 @@ bool Server::rename_session(StringView name)
     String new_socket_file = format("{}/kakoune/{}/{}", tmpdir(),
                                     get_user_name(), name);
 
+    if (file_exists(new_socket_file))
+        return false;
+
     if (rename(old_socket_file.c_str(), new_socket_file.c_str()) != 0)
         return false;