From 3816f1fa43cbab05b292e062f0d35a121154e0cc Mon Sep 17 00:00:00 2001
From: Frank LENORMAND <lenormf@gmail.com>
Date: Tue, 5 Nov 2019 20:24:08 +0100
Subject: [PATCH] src: Make sure clients connect from a TTY

Fixes #3159
---
 src/main.cc | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/src/main.cc b/src/main.cc
index 5cc39286..1a9c38a4 100644
--- a/src/main.cc
+++ b/src/main.cc
@@ -1104,6 +1104,9 @@ int main(int argc, char* argv[])
             for (auto name : files)
                 new_files += format("edit '{}';", escape(real_path(name), "'", '\\'));
 
+            if (not isatty(1))
+                throw startup_error("stdout is not a tty");
+
             return run_client(*server_session, {}, new_files + client_init, init_coord, ui_type, false);
         }
         else