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// -*- Mode: Go; indent-tabs-mode: t -*-
/*
* Copyright (C) 2020 Canonical Ltd
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 3 as
* published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*
*/
package configcore
import (
"fmt"
"gitee.com/mysnapcore/mysnapd/dirs"
"gitee.com/mysnapcore/mysnapd/overlord/configstate/config"
"gitee.com/mysnapcore/mysnapd/sysconfig"
"gitee.com/mysnapcore/mysnapd/systemd"
)
func init() {
// add supported configuration of this module
supportedConfigurations["core.system.disable-backlight-service"] = true
}
func validateBacklightServiceSettings(tr config.ConfGetter) error {
return validateBoolFlag(tr, "system.disable-backlight-service")
}
type backlightSysdLogger struct{}
func (l *backlightSysdLogger) Notify(status string) {
fmt.Fprintf(Stderr, "sysd: %s\n", status)
}
// systemd-backlight service has no installation config. It's started when needed via udev.
// So, systemctl enable/disable/start/stop are invalid commands. After masking/unmasking
// the service, rebooting is required for making new setting work
func handleBacklightServiceConfiguration(_ sysconfig.Device, tr config.ConfGetter, opts *fsOnlyContext) error {
var sysd systemd.Systemd
const serviceName = "systemd-backlight@.service"
if opts != nil {
sysd = systemd.NewEmulationMode(opts.RootDir)
} else {
sysd = systemd.NewUnderRoot(dirs.GlobalRootDir, systemd.SystemMode, &backlightSysdLogger{})
}
output, err := coreCfg(tr, "system.disable-backlight-service")
if err != nil {
return err
}
if output != "" {
switch output {
case "true":
return sysd.Mask(serviceName)
case "false":
return sysd.Unmask(serviceName)
default:
return fmt.Errorf("unsupported disable-backlight-service option: %q", output)
}
}
return nil
}
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