You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
29 lines
913 B
29 lines
913 B
// 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 NetBSD's sys/types.h header. |
|
|
|
package unix |
|
|
|
// Major returns the major component of a NetBSD device number. |
|
func Major(dev uint64) uint32 { |
|
return uint32((dev & 0x000fff00) >> 8) |
|
} |
|
|
|
// Minor returns the minor component of a NetBSD device number. |
|
func Minor(dev uint64) uint32 { |
|
minor := uint32((dev & 0x000000ff) >> 0) |
|
minor |= uint32((dev & 0xfff00000) >> 12) |
|
return minor |
|
} |
|
|
|
// Mkdev returns a NetBSD device number generated from the given major and minor |
|
// components. |
|
func Mkdev(major, minor uint32) uint64 { |
|
dev := (uint64(major) << 8) & 0x000fff00 |
|
dev |= (uint64(minor) << 12) & 0xfff00000 |
|
dev |= (uint64(minor) << 0) & 0x000000ff |
|
return dev |
|
}
|
|
|