// Load returns the data stored in the backend for h at the given offset and
// saves it in p. Load has the same semantics as io.ReaderAt, with one
// exception: when off is lower than zero, it is treated as an offset relative
// to the end of the file.
func (b *Local) Load(h restic.Handle, p []byte, off int64) (n int, err error) {
debug.Log("Load %v, length %v at %v", h, len(p), off)
if err := h.Valid(); err != nil {
return 0, err
}
f, err := fs.Open(filename(b.p, h.Type, h.Name))
if err != nil {
return 0, errors.Wrap(err, "Open")
}
defer func() {
e := f.Close()
if err == nil {
err = errors.Wrap(e, "Close")
}
}()
switch {
case off > 0:
_, err = f.Seek(off, 0)
case off < 0:
_, err = f.Seek(off, 2)
}
if err != nil {
return 0, errors.Wrap(err, "Seek")
}
return io.ReadFull(f, p)
}
// savePacker stores p in the backend.
func (r *Repository) savePacker(p *pack.Packer) error {
debug.Log("save packer with %d blobs\n", p.Count())
n, err := p.Finalize()
if err != nil {
return err
}
tmpfile := p.Writer().(*os.File)
f, err := fs.Open(tmpfile.Name())
if err != nil {
return errors.Wrap(err, "Open")
}
data := make([]byte, n)
m, err := io.ReadFull(f, data)
if err != nil {
return errors.Wrap(err, "ReadFul")
}
if uint(m) != n {
return errors.Errorf("read wrong number of bytes from %v: want %v, got %v", tmpfile.Name(), n, m)
}
if err = f.Close(); err != nil {
return errors.Wrap(err, "Close")
}
id := restic.Hash(data)
h := restic.Handle{Type: restic.DataFile, Name: id.String()}
err = r.be.Save(h, data)
if err != nil {
debug.Log("Save(%v) error: %v", h, err)
return err
}
debug.Log("saved as %v", h)
err = fs.Remove(tmpfile.Name())
if err != nil {
return errors.Wrap(err, "Remove")
}
// update blobs in the index
for _, b := range p.Blobs() {
debug.Log(" updating blob %v to pack %v", b.ID.Str(), id.Str())
r.idx.Current().Store(restic.PackedBlob{
Blob: restic.Blob{
Type: b.Type,
ID: b.ID,
Offset: b.Offset,
Length: uint(b.Length),
},
PackID: id,
})
}
return nil
}
// NewHtpasswdFromFile reads the users and passwords from a htpasswd
// file and returns them. If an error is encountered, it is returned, together
// with a nil-Pointer for the HtpasswdFile.
func NewHtpasswdFromFile(path string) (*HtpasswdFile, error) {
r, err := fs.Open(path)
if err != nil {
return nil, err
}
defer r.Close()
return NewHtpasswd(r)
}
// readDirNames reads the directory named by dirname and returns
// a sorted list of directory entries.
// taken from filepath/path.go
func readDirNames(dirname string) ([]string, error) {
f, err := fs.Open(dirname)
if err != nil {
return nil, errors.Wrap(err, "Open")
}
names, err := f.Readdirnames(-1)
f.Close()
if err != nil {
return nil, errors.Wrap(err, "Readdirnames")
}
sort.Strings(names)
return names, nil
}
// GetBlob returns a http.HandlerFunc that retrieves a blob
// from the repository.
func GetBlob(c *Context) http.HandlerFunc {
return func(w http.ResponseWriter, r *http.Request) {
vars := strings.Split(r.RequestURI, "/")
dir := vars[1]
name := vars[2]
path := filepath.Join(c.path, dir, name)
file, err := fs.Open(path)
if err != nil {
http.Error(w, "404 not found", 404)
return
}
defer file.Close()
http.ServeContent(w, r, "", time.Unix(0, 0), file)
}
}
func readdir(d string) (fileInfos []os.FileInfo, err error) {
f, e := fs.Open(d)
if e != nil {
return nil, errors.Wrap(e, "Open")
}
defer func() {
e := f.Close()
if err == nil {
err = errors.Wrap(e, "Close")
}
}()
return f.Readdir(-1)
}
func (node Node) restoreSymlinkTimestamps(path string, utimes [2]syscall.Timespec) error {
dir, err := fs.Open(filepath.Dir(path))
defer dir.Close()
if err != nil {
return errors.Wrap(err, "Open")
}
times := []unix.Timespec{
{Sec: utimes[0].Sec, Nsec: utimes[0].Nsec},
{Sec: utimes[1].Sec, Nsec: utimes[1].Nsec},
}
err = unix.UtimesNanoAt(int(dir.Fd()), filepath.Base(path), times, unix.AT_SYMLINK_NOFOLLOW)
if err != nil {
return errors.Wrap(err, "UtimesNanoAt")
}
return nil
}
// SaveFile stores the content of the file on the backend as a Blob by calling
// Save for each chunk.
func (arch *Archiver) SaveFile(p *restic.Progress, node *restic.Node) (*restic.Node, error) {
file, err := fs.Open(node.Path)
defer file.Close()
if err != nil {
return node, errors.Wrap(err, "Open")
}
debug.RunHook("archiver.SaveFile", node.Path)
node, err = arch.reloadFileIfChanged(node, file)
if err != nil {
return node, err
}
chnker := chunker.New(file, arch.repo.Config().ChunkerPolynomial)
resultChannels := [](<-chan saveResult){}
for {
chunk, err := chnker.Next(getBuf())
if errors.Cause(err) == io.EOF {
break
}
if err != nil {
return node, errors.Wrap(err, "chunker.Next")
}
resCh := make(chan saveResult, 1)
go arch.saveChunk(chunk, p, <-arch.blobToken, file, resCh)
resultChannels = append(resultChannels, resCh)
}
results, err := waitForResults(resultChannels)
if err != nil {
return node, err
}
err = updateNodeContent(node, results)
return node, err
}
// SaveFile stores the content of the file on the backend as a Blob by calling
// Save for each chunk.
func (arch *Archiver) SaveFile(p *Progress, node *Node) error {
file, err := fs.Open(node.path)
defer file.Close()
if err != nil {
return err
}
node, err = arch.reloadFileIfChanged(node, file)
if err != nil {
return err
}
chnker := chunker.New(file, arch.repo.Config.ChunkerPolynomial)
resultChannels := [](<-chan saveResult){}
for {
chunk, err := chnker.Next(getBuf())
if err == io.EOF {
break
}
if err != nil {
return errors.Annotate(err, "SaveFile() chunker.Next()")
}
resCh := make(chan saveResult, 1)
go arch.saveChunk(chunk, p, <-arch.blobToken, file, resCh)
resultChannels = append(resultChannels, resCh)
}
results, err := waitForResults(resultChannels)
if err != nil {
return err
}
err = updateNodeContent(node, results)
return err
}
func runBackup(opts BackupOptions, gopts GlobalOptions, args []string) error {
target, err := readLinesFromFile(opts.FilesFrom)
if err != nil {
return err
}
// merge files from files-from into normal args so we can reuse the normal
// args checks and have the ability to use both files-from and args at the
// same time
args = append(args, target...)
if len(args) == 0 {
return errors.Fatalf("wrong number of parameters")
}
for _, d := range args {
if a, err := filepath.Abs(d); err == nil {
d = a
}
target = append(target, d)
}
target, err = filterExisting(target)
if err != nil {
return err
}
// allowed devices
var allowedDevs map[uint64]struct{}
if opts.ExcludeOtherFS {
allowedDevs, err = gatherDevices(target)
if err != nil {
return err
}
debug.Log("allowed devices: %v\n", allowedDevs)
}
repo, err := OpenRepository(gopts)
if err != nil {
return err
}
lock, err := lockRepo(repo)
defer unlockRepo(lock)
if err != nil {
return err
}
err = repo.LoadIndex()
if err != nil {
return err
}
var parentSnapshotID *restic.ID
// Force using a parent
if !opts.Force && opts.Parent != "" {
id, err := restic.FindSnapshot(repo, opts.Parent)
if err != nil {
return errors.Fatalf("invalid id %q: %v", opts.Parent, err)
}
parentSnapshotID = &id
}
// Find last snapshot to set it as parent, if not already set
if !opts.Force && parentSnapshotID == nil {
id, err := restic.FindLatestSnapshot(repo, target, "")
if err == nil {
parentSnapshotID = &id
} else if err != restic.ErrNoSnapshotFound {
return err
}
}
if parentSnapshotID != nil {
Verbosef("using parent snapshot %v\n", parentSnapshotID.Str())
}
Verbosef("scan %v\n", target)
// add patterns from file
if opts.ExcludeFile != "" {
file, err := fs.Open(opts.ExcludeFile)
if err != nil {
Warnf("error reading exclude patterns: %v", err)
return nil
}
scanner := bufio.NewScanner(file)
for scanner.Scan() {
line := scanner.Text()
if !strings.HasPrefix(line, "#") {
line = os.ExpandEnv(line)
opts.Excludes = append(opts.Excludes, line)
}
}
}
selectFilter := func(item string, fi os.FileInfo) bool {
matched, err := filter.List(opts.Excludes, item)
if err != nil {
Warnf("error for exclude pattern: %v", err)
}
if matched {
debug.Log("path %q excluded by a filter", item)
return false
}
if !opts.ExcludeOtherFS || fi == nil {
return true
}
id, err := fs.DeviceID(fi)
if err != nil {
// This should never happen because gatherDevices() would have
// errored out earlier. If it still does that's a reason to panic.
panic(err)
}
_, found := allowedDevs[id]
if !found {
debug.Log("path %q on disallowed device %d", item, id)
return false
}
return true
}
stat, err := archiver.Scan(target, selectFilter, newScanProgress(gopts))
if err != nil {
return err
}
arch := archiver.New(repo)
arch.Excludes = opts.Excludes
arch.SelectFilter = selectFilter
arch.Error = func(dir string, fi os.FileInfo, err error) error {
// TODO: make ignoring errors configurable
Warnf("%s\rerror for %s: %v\n", ClearLine(), dir, err)
return nil
}
_, id, err := arch.Snapshot(newArchiveProgress(gopts, stat), target, opts.Tags, parentSnapshotID)
if err != nil {
return err
}
Verbosef("snapshot %s saved\n", id.Str())
return nil
}