From 9bedd6807dc3a1ad6c80e62a6a7aae27ca769de0 Mon Sep 17 00:00:00 2001
From: Takashi Yano <takashi.yano@nifty.ne.jp>
Date: Wed, 16 Oct 2019 21:34:08 +0900
Subject: [PATCH] Cygwin: pty: Avoid detach console in the process running as
 service.

---
 winsup/cygwin/fhandler_tty.cc | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/winsup/cygwin/fhandler_tty.cc b/winsup/cygwin/fhandler_tty.cc
index 1095c82eb..dbb035ff3 100644
--- a/winsup/cygwin/fhandler_tty.cc
+++ b/winsup/cygwin/fhandler_tty.cc
@@ -1048,6 +1048,8 @@ fhandler_pty_slave::try_reattach_pcon (void)
 
   /* Do not detach from the console because re-attaching will
      fail if helper process is running as service account. */
+  if (get_ttyp()->attach_pcon_in_fork)
+    return false;
   if (pcon_attached_to >= 0 &&
       cygwin_shared->tty[pcon_attached_to]->attach_pcon_in_fork)
     return false;