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lid_switch_sw.go
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lid_switch_sw.go
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// SPDX-FileCopyrightText: 2018 - 2022 UnionTech Software Technology Co., Ltd.
//
// SPDX-License-Identifier: GPL-3.0-or-later
package power
import (
"io/ioutil"
"os"
"strings"
"time"
)
const (
swLidOpen = "1"
swLidClose = "0"
)
const swLidStateFile = "/sys/bus/platform/devices/liddev/lid_state"
func isSWLidStateFileExist() bool {
_, err := os.Stat(swLidStateFile)
return err == nil
}
func (m *Manager) initLidSwitchSW() {
m.HasLidSwitch = true
go m.swLidSwitchCheckLoop()
}
func (m *Manager) swLidSwitchCheckLoop() {
prevState := getLidStateSW()
for {
time.Sleep(time.Second * 3)
newState := getLidStateSW()
if prevState != newState {
prevState = newState
var closed bool
switch newState {
case swLidClose:
closed = true
case swLidOpen:
closed = false
default:
logger.Warningf("unknown lid state %q", newState)
continue
}
m.handleLidSwitchEvent(closed)
}
}
}
// lid_state content: '1\n'
func getLidStateSW() string {
content, err := ioutil.ReadFile(swLidStateFile)
if err != nil {
logger.Warning(err)
return swLidOpen
}
return strings.TrimRight(string(content), "\n")
}