// DeviceFs is a simple filesystem interface to an MTP device. It
// should be wrapped in a Locking(Raw)FileSystem to make sure it is
// threadsafe. The file system assumes the device does not touch the
// storage. Arguments are the opened mtp device and a directory for the
// backing store.
func NewDeviceFs(d *mtp.Device, storages []uint32, options DeviceFsOptions) (*DeviceFs, error) {
root := rootNode{}
fs := &DeviceFs{root: &root, dev: d, options: &options}
root.fs = fs
fs.storages = storages
err := d.GetDeviceInfo(&fs.devInfo)
if err != nil {
return fs, nil
}
if !strings.Contains(fs.devInfo.MTPExtension, "android.com") {
fs.options.Android = false
}
if !options.Android {
err = fs.setupClassic()
if err != nil {
return nil, err
}
}
fs.mungeVfat = make(map[uint32]bool)
for _, sid := range fs.storages {
var info mtp.StorageInfo
if err != nil {
return nil, err
}
fs.mungeVfat[sid] = info.IsRemovable() && fs.options.RemovableVFat
}
return fs, nil
}
func SelectStorages(dev *mtp.Device, pat string) ([]uint32, error) {
sids := mtp.Uint32Array{}
err := dev.GetStorageIDs(&sids)
if err != nil {
return nil, err
}
re, err := regexp.Compile(pat)
if err != nil {
return nil, err
}
filtered := []uint32{}
for _, id := range sids.Values {
var s mtp.StorageInfo
err := dev.GetStorageInfo(id, &s)
if err != nil {
return nil, err
}
if !s.IsHierarchical() {
log.Printf("skipping non hierarchical storage %q", s.StorageDescription)
continue
}
if re.FindStringIndex(s.StorageDescription) == nil {
log.Printf("filtering out storage %q", s.StorageDescription)
continue
}
filtered = append(filtered, id)
}
return filtered, nil
}
// DeviceFs is a simple filesystem interface to an MTP device. It
// should be wrapped in a Locking(Raw)FileSystem to make sure it is
// threadsafe. The file system assumes the device does not touch the
// storage. Arguments are the opened mtp device and a directory for the
// backing store.
func NewDeviceFSRoot(d *mtp.Device, storages []uint32, options DeviceFsOptions) (nodefs.Node, error) {
root := rootNode{Node: nodefs.NewDefaultNode()}
fs := &deviceFS{
root: &root,
dev: d,
options: &options,
}
root.fs = fs
fs.storages = storages
if err := d.GetDeviceInfo(&fs.devInfo); err != nil {
return nil, err
}
if !strings.Contains(fs.devInfo.MTPExtension, "android.com") {
fs.options.Android = false
}
if !options.Android {
if err := fs.setupClassic(); err != nil {
return nil, err
}
}
fs.mungeVfat = make(map[uint32]bool)
for _, sid := range fs.storages {
var info mtp.StorageInfo
if err := fs.dev.GetStorageInfo(sid, &info); err != nil {
return nil, err
}
fs.mungeVfat[sid] = info.IsRemovable() && fs.options.RemovableVFat
}
return fs.Root(), nil
}