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+#ifndef _MYFLOCK_H_INCLUDED_
+#define _MYFLOCK_H_INCLUDED_
+
+/*++
+/* NAME
+/* myflock 3h
+/* SUMMARY
+/* lock open file
+/* SYNOPSIS
+/* #include <myflock.h>
+/* DESCRIPTION
+/* .nf
+
+ /*
+ * External interface.
+ */
+extern int WARN_UNUSED_RESULT myflock(int, int, int);
+
+ /*
+ * Lock styles.
+ */
+#define MYFLOCK_STYLE_FLOCK 1
+#define MYFLOCK_STYLE_FCNTL 2
+
+ /*
+ * Lock request types.
+ */
+#define MYFLOCK_OP_NONE 0
+#define MYFLOCK_OP_SHARED 1
+#define MYFLOCK_OP_EXCLUSIVE 2
+#define MYFLOCK_OP_NOWAIT 4
+
+#define MYFLOCK_OP_BITS \
+ (MYFLOCK_OP_SHARED | MYFLOCK_OP_EXCLUSIVE | MYFLOCK_OP_NOWAIT)
+
+/* LICENSE
+/* .ad
+/* .fi
+/* The Secure Mailer license must be distributed with this software.
+/* AUTHOR(S)
+/* Wietse Venema
+/* IBM T.J. Watson Research
+/* P.O. Box 704
+/* Yorktown Heights, NY 10598, USA
+/*
+/* Wietse Venema
+/* Google, Inc.
+/* 111 8th Avenue
+/* New York, NY 10011, USA
+/*--*/
+
+#endif