resource/lvm/lowlevel/systemd.go
// Copyright © 2016 Asteris, LLC
//
// 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 lowlevel
import "os"
func (lvm *realLVM) CheckUnit(filename string, content string) (bool, error) {
realContent, err := lvm.backend.ReadFile(filename)
if err != nil {
if os.IsNotExist(err) {
return true, nil
}
return false, err
}
shouldUpdate := string(realContent) != content
return shouldUpdate, nil
}
func (lvm *realLVM) UpdateUnit(filename string, content string) error {
if err := lvm.backend.WriteFile(filename, []byte(content), 0644); err != nil {
return err
}
return lvm.backend.Run("systemctl", []string{"daemon-reload"})
}
func (lvm *realLVM) StartUnit(unitname string) error {
return lvm.backend.Run("systemctl", []string{"start", unitname})
}