+#if @HAVE_SYS_FILE_H@
+# @INCLUDE_NEXT@ @NEXT_SYS_FILE_H@
+#endif
+
+#ifndef _@GUARD_PREFIX@_SYS_FILE_H
+#define _@GUARD_PREFIX@_SYS_FILE_H
+
+#ifndef LOCK_SH
+/* Operations for the 'flock' call (same as Linux kernel constants). */
+# define LOCK_SH 1 /* Shared lock. */
+# define LOCK_EX 2 /* Exclusive lock. */
+# define LOCK_UN 8 /* Unlock. */