From 5c6e7857ac2d5db80969982a3c2a03b57ba9ac73 Mon Sep 17 00:00:00 2001
From: adam j hartz <hartz@mit.edu>
Date: Thu, 9 Jun 2016 22:24:47 -0400
Subject: [PATCH] attempted fix for PermissionError and ProcessLookupError on
 Cygwin

---
 xonsh/jobs.py | 13 +++++++++++++
 1 file changed, 13 insertions(+)

diff --git a/xonsh/jobs.py b/xonsh/jobs.py
index 4acb76ac4..2dae04fdb 100644
--- a/xonsh/jobs.py
+++ b/xonsh/jobs.py
@@ -24,6 +24,19 @@ if ON_DARWIN:
 elif ON_WINDOWS:
     pass
 
+elif ON_CYGWIN:
+    # Similar to what happened on OSX, more issues on Cygwin
+    # (see Github issue #514).
+    def _send_signal(job, signal):
+        try:
+            os.killpg(job['pgrp'], signal)
+        except (PermissionError, ProcessLookupError):
+            for pid in job['pids']:
+                try:
+                    os.kill(pid, signal)
+                except:
+                    pass
+
 else:
     def _send_signal(job, signal):
         os.killpg(job['pgrp'], signal)