24 lines
747 B
Go
24 lines
747 B
Go
// 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) | uint64(minor)
|
|
}
|