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9a76102bfb
Make all our package sources use Go 1.17 gofmt format (adding //go:build lines). Not strictly necessary but will avoid spurious changes as files are edited. Part of //go:build change (#41184). See https://golang.org/design/draft-gobuild Change-Id: I01667f826428426a39c84717d02efa25fa44553c Reviewed-on: https://go-review.googlesource.com/c/sys/+/294490 TryBot-Result: Go Bot <gobot@golang.org> Reviewed-by: Keith Randall <khr@golang.org> Reviewed-by: Josh Bleecher Snyder <josharian@gmail.com> Reviewed-by: Matt Layher <mdlayher@gmail.com> Trust: Josh Bleecher Snyder <josharian@gmail.com> Trust: Russ Cox <rsc@golang.org> Run-TryBot: Josh Bleecher Snyder <josharian@gmail.com> Run-TryBot: Russ Cox <rsc@golang.org>
30 lines
878 B
Go
30 lines
878 B
Go
// Copyright 2018 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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//go:build aix && ppc64
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// +build aix,ppc64
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// Functions to access/create device major and minor numbers matching the
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// encoding used AIX.
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package unix
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// Major returns the major component of a Linux device number.
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func Major(dev uint64) uint32 {
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return uint32((dev & 0x3fffffff00000000) >> 32)
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}
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// Minor returns the minor component of a Linux device number.
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func Minor(dev uint64) uint32 {
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return uint32((dev & 0x00000000ffffffff) >> 0)
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}
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// Mkdev returns a Linux 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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var DEVNO64 uint64
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DEVNO64 = 0x8000000000000000
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return ((uint64(major) << 32) | (uint64(minor) & 0x00000000FFFFFFFF) | DEVNO64)
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}
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