From 9751dd62c35753496527e00ca66756cf471540f0 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?P=C3=A1draig=20Brady?= <P@draigBrady.com>
Date: Tue, 12 Apr 2022 12:04:38 +0100
Subject: [PATCH] sync: support syncing files on cygwin

* src/sync.c (sync_arg): Similarly to AIX, Cygwin 2.9.0
was seen to need write access to have permission to sync a file.
---
 src/sync.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/src/sync.c b/src/sync.c
index ffb4747fa..de6de5d00 100644
--- a/src/sync.c
+++ b/src/sync.c
@@ -94,8 +94,8 @@ sync_arg (enum sync_mode mode, char const *file)
   int open_flags = O_RDONLY | O_NONBLOCK;
   int fd;
 
-#ifdef _AIX
-  /* AIX 7.1 fsync requires write access to file.  */
+#if defined _AIX || defined __CYGWIN__
+  /* AIX 7.1, CYGWIN 2.9.0, fsync requires write access to file.  */
   if (mode == MODE_FILE)
     open_flags = O_WRONLY | O_NONBLOCK;
 #endif
-- 
2.26.2