From fc8d2b2ccaf3b519e6b606fd95217f94b4a6fcbc Mon Sep 17 00:00:00 2001
From: Ken Brown <kbrown@cornell.edu>
Date: Wed, 15 Sep 2021 11:24:25 -0400
Subject: [PATCH 1/2] Cygwin: pipes: fix a return value

If PeekNamedPipe fails in select.cc:pipe_data_available, return -1
rather than 1.
---
 winsup/cygwin/select.cc | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/winsup/cygwin/select.cc b/winsup/cygwin/select.cc
index 566cf66d6..cdb213a42 100644
--- a/winsup/cygwin/select.cc
+++ b/winsup/cygwin/select.cc
@@ -645,7 +645,7 @@ pipe_data_available (int fd, fhandler_base *fh, HANDLE h, bool writing)
 	    return 1; /* We cannot know actual write pipe space. */
 	  DWORD nbytes_in_pipe;
 	  if (!PeekNamedPipe (query_hdl, NULL, 0, NULL, &nbytes_in_pipe, NULL))
-	    return 1;
+	    return -1;
 	  fpli.WriteQuotaAvailable = fpli.InboundQuota - nbytes_in_pipe;
 	}
       if (fpli.WriteQuotaAvailable > 0)
-- 
2.33.0