// Copyright 2017 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. // Functions to access/create device major and minor numbers matching the // encoding used in Darwin's sys/types.h header. package unix // Major returns the major component of a Darwin device number. func Major(dev uint64) uint32 { return uint32((dev >> 24) & 0xff) } // Minor returns the minor component of a Darwin device number. func Minor(dev uint64) uint32 { return uint32(dev & 0xffffff) } // Mkdev returns a Darwin device number generated from the given major and minor // components. func Mkdev(major, minor uint32) uint64 { return uint64((major << 24) | minor) }