kubernetes/vendor/golang.org/x/sys/unix/fcntl.go

var fcntl64Syscall …

func fcntl(fd int, cmd, arg int) (int, error) { … }

// FcntlInt performs a fcntl syscall on fd with the provided command and argument.
func FcntlInt(fd uintptr, cmd, arg int) (int, error) { … }

// 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 { … }