1 files changed, 13 insertions, 0 deletions
diff --git a/src/syscall/flock_darwin.go b/src/syscall/flock_darwin.go
new file mode 100644
index 0000000..d2bd841
--- /dev/null
+++ b/src/syscall/flock_darwin.go
@@ -0,0 +1,13 @@
+// Copyright 2018 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+package syscall
+
+import "unsafe"
+
+// FcntlFlock performs a fcntl syscall for the F_GETLK, F_SETLK or F_SETLKW command.
+func FcntlFlock(fd uintptr, cmd int, lk *Flock_t) error {
+	_, err := fcntlPtr(int(fd), cmd, unsafe.Pointer(lk))
+	return err
+}