blob: d3b63063f93f8f21750659de7f8e0de19719ecc6 (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
|
// Copyright 2018 Google Inc.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package linux
// MakeDeviceID encodes a major and minor device number into a single device ID.
//
// Format (see linux/kdev_t.h:new_encode_dev):
//
// Bits 7:0 - minor bits 7:0
// Bits 19:8 - major bits 11:0
// Bits 31:20 - minor bits 19:8
func MakeDeviceID(major uint16, minor uint32) uint32 {
return (minor & 0xff) | ((uint32(major) & 0xfff) << 8) | ((minor >> 8) << 20)
}
// Character device IDs.
//
// See Documentations/devices.txt and uapi/linux/major.h.
const (
// TTYAUX_MAJOR is the major device number for alternate TTY devices.
TTYAUX_MAJOR = 5
// UNIX98_PTY_MASTER_MAJOR is the initial major device number for
// Unix98 PTY masters.
UNIX98_PTY_MASTER_MAJOR = 128
// UNIX98_PTY_SLAVE_MAJOR is the initial major device number for
// Unix98 PTY slaves.
UNIX98_PTY_SLAVE_MAJOR = 136
)
// Minor device numbers for TTYAUX_MAJOR.
const (
// PTMX_MINOR is the minor device number for /dev/ptmx.
PTMX_MINOR = 2
)
|
