| // 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 partutil |
| |
| import ( |
| "bytes" |
| "fmt" |
| "log" |
| "os" |
| "os/exec" |
| "strconv" |
| ) |
| |
| // MovePartition moves a partition to a start sector. |
| // It takes destination input like 2048 (absolute sector number), +5G or -200M. |
| func MovePartition(disk string, partNumInt int, dest string) error { |
| if len(disk) <= 0 || partNumInt <= 0 || len(dest) <= 0 { |
| return fmt.Errorf("invalid input: disk=%q, partNumInt=%d, dest=%q", disk, partNumInt, dest) |
| } |
| |
| var destBuffer bytes.Buffer |
| destBuffer.WriteString(dest) |
| cmd := exec.Command("sudo", "sfdisk", "--no-reread", "--move-data=/dev/null", disk, "-N", strconv.Itoa(partNumInt)) |
| cmd.Stdin = &destBuffer |
| cmd.Stdout = os.Stdout |
| cmd.Stderr = os.Stderr |
| if err := cmd.Run(); err != nil { |
| return fmt.Errorf("error in executing sfdisk --move-data, "+ |
| "input: disk=%q, partNumInt=%d, dest=%q, "+ |
| "error msg: (%v)", disk, partNumInt, dest, err) |
| } |
| log.Printf("\nCompleted moving %s partition %d \n\n", disk, partNumInt) |
| return nil |
| } |