64 lines
1.2 KiB
Go
64 lines
1.2 KiB
Go
// +build linux
|
|
|
|
package aufs
|
|
|
|
import (
|
|
"bufio"
|
|
"io/ioutil"
|
|
"os"
|
|
"path"
|
|
)
|
|
|
|
// Return all the directories
|
|
func loadIds(root string) ([]string, error) {
|
|
dirs, err := ioutil.ReadDir(root)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
out := []string{}
|
|
for _, d := range dirs {
|
|
if !d.IsDir() {
|
|
out = append(out, d.Name())
|
|
}
|
|
}
|
|
return out, nil
|
|
}
|
|
|
|
// Read the layers file for the current id and return all the
|
|
// layers represented by new lines in the file
|
|
//
|
|
// If there are no lines in the file then the id has no parent
|
|
// and an empty slice is returned.
|
|
func getParentIDs(root, id string) ([]string, error) {
|
|
f, err := os.Open(path.Join(root, "layers", id))
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
defer f.Close()
|
|
|
|
out := []string{}
|
|
s := bufio.NewScanner(f)
|
|
|
|
for s.Scan() {
|
|
if t := s.Text(); t != "" {
|
|
out = append(out, s.Text())
|
|
}
|
|
}
|
|
return out, s.Err()
|
|
}
|
|
|
|
func (a *Driver) getMountpoint(id string) string {
|
|
return path.Join(a.mntPath(), id)
|
|
}
|
|
|
|
func (a *Driver) mntPath() string {
|
|
return path.Join(a.rootPath(), "mnt")
|
|
}
|
|
|
|
func (a *Driver) getDiffPath(id string) string {
|
|
return path.Join(a.diffPath(), id)
|
|
}
|
|
|
|
func (a *Driver) diffPath() string {
|
|
return path.Join(a.rootPath(), "diff")
|
|
}
|