1 files changed, 20 insertions, 0 deletions
diff --git a/src/port/lockf.h b/src/port/lockf.h
new file mode 100644
index 0000000..5ec99b3
--- /dev/null
+++ b/src/port/lockf.h
@@ -0,0 +1,20 @@
+#ifndef __LOCKF_H
+#define __LOCKF_H
+
+#include "sys.h"
+
+#if !defined HAVE_LOCKF
+
+/* Drop-in replacement for the simplified lockf interface (POSIX) */
+#include <fcntl.h>		/* for fcntl and locking flags */
+
+#define F_ULOCK	0		/* Unlock a previously locked region */
+#define F_LOCK	1		/* Lock exclusively */
+#define F_TLOCK	2		/* Test and lock exclusively */
+#define F_TEST	3		/* Test for a locked region */
+
+extern int lockf( int fd, int cmd, off_t len );
+
+#endif /* !defined HAVE_LOCKF */
+
+#endif /* ifndef __LOCKF_H */