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.

diff --git a/src/sync.c b/src/sync.c
index ffb4747fa81e5503bb3b1076c938e72117a05574..de6de5d001761e96a9ead567210b44957896f99d 100644 (file)
--- 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