-var (
- flagSerializeIO bool
- flagReadonly bool
-)
-type volumeSet []Volume
-
-func (vs *volumeSet) Set(value string) error {
- if dirs := strings.Split(value, ","); len(dirs) > 1 {
- log.Print("DEPRECATED: using comma-separated volume list.")
- for _, dir := range dirs {
- if err := vs.Set(dir); err != nil {
- return err
- }
- }
- return nil
- }
- if len(value) == 0 || value[0] != '/' {
- return errors.New("Invalid volume: must begin with '/'.")
- }
- if _, err := os.Stat(value); err != nil {
- return err
- }
- *vs = append(*vs, MakeUnixVolume(value, flagSerializeIO, flagReadonly))
- return nil
-}
-
-func (vs *volumeSet) String() string {
- s := "["
- for i, v := range *vs {
- if i > 0 {
- s = s + " "
- }
- s = s + v.String()
- }
- return s + "]"
-}
-
-// Discover adds a volume for every directory named "keep" that is
-// located at the top level of a device- or tmpfs-backed mount point
-// other than "/". It returns the number of volumes added.
-func (vs *volumeSet) Discover() int {
- added := 0
- f, err := os.Open(PROC_MOUNTS)
- if err != nil {
- log.Fatalf("opening %s: %s", PROC_MOUNTS, err)
- }
- scanner := bufio.NewScanner(f)
- for scanner.Scan() {
- args := strings.Fields(scanner.Text())
- if err := scanner.Err(); err != nil {
- log.Fatalf("reading %s: %s", PROC_MOUNTS, err)
- }
- dev, mount := args[0], args[1]
- if mount == "/" {
- continue
- }
- if dev != "tmpfs" && !strings.HasPrefix(dev, "/dev/") {
- continue
- }
- keepdir := mount + "/keep"
- if st, err := os.Stat(keepdir); err != nil || !st.IsDir() {
- continue
- }
- // Set the -readonly flag (but only for this volume)
- // if the filesystem is mounted readonly.
- flagReadonlyWas := flagReadonly
- for _, fsopt := range strings.Split(args[3], ",") {
- if fsopt == "ro" {
- flagReadonly = true
- break
- }
- if fsopt == "rw" {
- break
- }
- }
- vs.Set(keepdir)
- flagReadonly = flagReadonlyWas
- added++
- }
- return added
-}