| // Copyright 2020 Google 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 tools |
| |
| import ( |
| "fmt" |
| "log" |
| |
| "cos.googlesource.com/cos/tools.git/src/pkg/tools/partutil" |
| ) |
| |
| // DisableSystemdService disables the auto-update service. |
| func DisableSystemdService(service string) error { |
| cmd := "systemd.mask=" + service |
| grubPath, err := partutil.MountEFIPartition() |
| if err != nil { |
| return fmt.Errorf("cannot mount EFI partition,"+ |
| "error msg:(%v)", err) |
| } |
| defer partutil.UnmountEFIPartition() |
| contains, err := partutil.GRUBContains(grubPath, cmd) |
| if err != nil { |
| return fmt.Errorf("cannot read GRUB file at %q,"+ |
| "error msg:(%v)", grubPath, err) |
| } |
| if contains { |
| return nil |
| } |
| if err := partutil.AddCmdToGRUB(grubPath, cmd); err != nil { |
| return fmt.Errorf("cannot add commmand to GRUB file at %q,"+ |
| "cmd=%q, error msg:(%v)", grubPath, cmd, err) |
| } |
| log.Printf("%q service disabled.", service) |
| return nil |
| } |