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// +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")
}
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