1 files changed, 31 insertions, 0 deletions
diff --git a/src/lib/fdatasync-path.c b/src/lib/fdatasync-path.c
new file mode 100644
index 0000000..769f483
--- /dev/null
+++ b/src/lib/fdatasync-path.c
@@ -0,0 +1,31 @@
+/* Copyright (c) 2008-2018 Dovecot authors, see the included COPYING file */
+
+#include "lib.h"
+#include "fdatasync-path.h"
+
+#include <fcntl.h>
+#include <unistd.h>
+
+int fdatasync_path(const char *path)
+{
+	int fd, ret = 0;
+
+	/* Directories need to be opened as read-only.
+	   fsync() doesn't appear to care about it. */
+	fd = open(path, O_RDONLY);
+	if (fd == -1)
+		return -1;
+	if (fdatasync(fd) < 0) {
+		/* Some OSes/FSes don't allow fsyncing directories. Silently
+		   ignore the problem. */
+		if (errno == EBADF) {
+			/* e.g. NetBSD */
+		} else if (errno == EINVAL) {
+			/* e.g. Linux+CIFS */
+		} else {
+			ret = -1;
+		}
+	}
+	i_close_fd(&fd);
+	return ret;
+}