From 640f4444f55a3027e7654b6f5714605d466007e0 Mon Sep 17 00:00:00 2001
From: Mahmoud Al-Qudsi <mqudsi@neosmart.net>
Date: Fri, 6 Nov 2020 20:48:25 -0600
Subject: [PATCH] Disable SIGIO notifier on WSL

It currently does not trigger the uvar notifier and fails the automated
tests.

See #7429.
---
 src/env_universal_common.cpp | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/src/env_universal_common.cpp b/src/env_universal_common.cpp
index 56758ac7c..965533287 100644
--- a/src/env_universal_common.cpp
+++ b/src/env_universal_common.cpp
@@ -1572,6 +1572,10 @@ universal_notifier_t::notifier_strategy_t universal_notifier_t::resolve_default_
 #elif defined(__CYGWIN__)
     return strategy_shmem_polling;
 #elif defined(SIGIO)
+    // The SIGIO notifier does not yet work on WSL. See #7429
+    if (is_windows_subsystem_for_linux()) {
+        return strategy_named_pipe;
+    }
     return strategy_sigio;
 #else
     return strategy_named_pipe;