From fdc8950fbe2fd8c6499405abd5bcf4f1c9f08d22 Mon Sep 17 00:00:00 2001
From: Alexey Milovidov <milovidov@yandex-team.ru>
Date: Wed, 23 Dec 2020 17:31:10 +0300
Subject: [PATCH] Do not use watchdog when server is run from tty

---
 programs/server/Server.cpp | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/programs/server/Server.cpp b/programs/server/Server.cpp
index f87b4294587..76765c0374c 100644
--- a/programs/server/Server.cpp
+++ b/programs/server/Server.cpp
@@ -104,7 +104,12 @@ namespace CurrentMetrics
 int mainEntryClickHouseServer(int argc, char ** argv)
 {
     DB::Server app;
-    app.shouldSetupWatchdog(argc ? argv[0] : nullptr);
+
+    /// Do not fork separate process from watchdog if we attached to terminal.
+    /// Otherwise it breaks gdb usage.
+    if (argc > 0 && !isatty(STDIN_FILENO) && !isatty(STDOUT_FILENO) && !isatty(STDERR_FILENO))
+        app.shouldSetupWatchdog(argv[0]);
+
     try
     {
         return app.run(argc, argv);