From 42e0893392d8833e879cc84dfd88a4299f10265d Mon Sep 17 00:00:00 2001
From: Producer Matt <58014742+ProducerMatt@users.noreply.github.com>
Date: Thu, 28 Apr 2022 17:59:50 -0500
Subject: [PATCH] Unset stale SSH_TTY environment variable

This variable would confuse devices that relied on it, such as the Clipetty extension for Emacs. See issue #1134
---
 src/frontend/mosh-server.cc | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/src/frontend/mosh-server.cc b/src/frontend/mosh-server.cc
index e8a6cb70f..35aa7f5c5 100644
--- a/src/frontend/mosh-server.cc
+++ b/src/frontend/mosh-server.cc
@@ -570,6 +570,12 @@ static int run_server( const char *desired_ip, const char *desired_port,
       exit( 1 );
     }
 
+    /* clear stale SSH_TTY environment variable */
+    if ( unsetenv( "SSH_TTY" ) < 0 ) {
+      perror( "unsetenv" );
+      exit( 1 );
+    }
+
     chdir_homedir();
 
     if ( with_motd && (!motd_hushed()) ) {