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24 lines
747 B
24 lines
747 B
// Copyright 2017 The Go Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style
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// license that can be found in the LICENSE file.
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// Functions to access/create device major and minor numbers matching the
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// encoding used in Darwin's sys/types.h header.
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package unix
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// Major returns the major component of a Darwin device number.
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func Major(dev uint64) uint32 {
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return uint32((dev >> 24) & 0xff)
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}
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// Minor returns the minor component of a Darwin device number.
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func Minor(dev uint64) uint32 {
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return uint32(dev & 0xffffff)
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}
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// Mkdev returns a Darwin device number generated from the given major and minor
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// components.
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func Mkdev(major, minor uint32) uint64 {
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return (uint64(major) << 24) | uint64(minor)
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}
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