mirror of
https://github.com/octoleo/restic.git
synced 2024-11-23 05:12:10 +00:00
344 lines
7.5 KiB
Go
344 lines
7.5 KiB
Go
package restic
|
|
|
|
import (
|
|
"encoding/json"
|
|
"fmt"
|
|
"os"
|
|
"strconv"
|
|
"syscall"
|
|
"time"
|
|
|
|
"github.com/juju/arrar"
|
|
"github.com/restic/restic/backend"
|
|
)
|
|
|
|
type Node struct {
|
|
Name string `json:"name"`
|
|
Type string `json:"type"`
|
|
Mode os.FileMode `json:"mode,omitempty"`
|
|
ModTime time.Time `json:"mtime,omitempty"`
|
|
AccessTime time.Time `json:"atime,omitempty"`
|
|
ChangeTime time.Time `json:"ctime,omitempty"`
|
|
UID uint32 `json:"uid"`
|
|
GID uint32 `json:"gid"`
|
|
User string `json:"user,omitempty"`
|
|
Group string `json:"group,omitempty"`
|
|
Inode uint64 `json:"inode,omitempty"`
|
|
Size uint64 `json:"size,omitempty"`
|
|
Links uint64 `json:"links,omitempty"`
|
|
LinkTarget string `json:"linktarget,omitempty"`
|
|
Device uint64 `json:"device,omitempty"`
|
|
Content []backend.ID `json:"content"`
|
|
Subtree backend.ID `json:"subtree,omitempty"`
|
|
|
|
Error string `json:"error,omitempty"`
|
|
|
|
tree *Tree
|
|
|
|
path string
|
|
err error
|
|
blobs Blobs
|
|
}
|
|
|
|
func (n Node) String() string {
|
|
switch n.Type {
|
|
case "file":
|
|
return fmt.Sprintf("%s %5d %5d %6d %s %s",
|
|
n.Mode, n.UID, n.GID, n.Size, n.ModTime, n.Name)
|
|
case "dir":
|
|
return fmt.Sprintf("%s %5d %5d %6d %s %s",
|
|
n.Mode|os.ModeDir, n.UID, n.GID, n.Size, n.ModTime, n.Name)
|
|
}
|
|
|
|
return fmt.Sprintf("<Node(%s) %s>", n.Type, n.Name)
|
|
}
|
|
|
|
func (node Node) Tree() *Tree {
|
|
return node.tree
|
|
}
|
|
|
|
func NodeFromFileInfo(path string, fi os.FileInfo) (*Node, error) {
|
|
node := &Node{
|
|
path: path,
|
|
Name: fi.Name(),
|
|
Mode: fi.Mode() & (os.ModePerm | os.ModeType),
|
|
ModTime: fi.ModTime(),
|
|
}
|
|
|
|
node.Type = nodeTypeFromFileInfo(path, fi)
|
|
if node.Type == "file" {
|
|
node.Size = uint64(fi.Size())
|
|
}
|
|
|
|
err := node.fillExtra(path, fi)
|
|
return node, err
|
|
}
|
|
|
|
func nodeTypeFromFileInfo(path string, fi os.FileInfo) string {
|
|
switch fi.Mode() & (os.ModeType | os.ModeCharDevice) {
|
|
case 0:
|
|
return "file"
|
|
case os.ModeDir:
|
|
return "dir"
|
|
case os.ModeSymlink:
|
|
return "symlink"
|
|
case os.ModeDevice | os.ModeCharDevice:
|
|
return "chardev"
|
|
case os.ModeDevice:
|
|
return "dev"
|
|
case os.ModeNamedPipe:
|
|
return "fifo"
|
|
case os.ModeSocket:
|
|
return "socket"
|
|
}
|
|
|
|
return ""
|
|
}
|
|
|
|
func CreateNodeAt(node *Node, m *Map, s Server, path string) error {
|
|
switch node.Type {
|
|
case "dir":
|
|
err := os.Mkdir(path, node.Mode)
|
|
if err != nil {
|
|
return arrar.Annotate(err, "Mkdir")
|
|
}
|
|
|
|
err = os.Lchown(path, int(node.UID), int(node.GID))
|
|
if err != nil {
|
|
return arrar.Annotate(err, "Lchown")
|
|
}
|
|
|
|
var utimes = []syscall.Timespec{
|
|
syscall.NsecToTimespec(node.AccessTime.UnixNano()),
|
|
syscall.NsecToTimespec(node.ModTime.UnixNano()),
|
|
}
|
|
err = syscall.UtimesNano(path, utimes)
|
|
if err != nil {
|
|
return arrar.Annotate(err, "Utimesnano")
|
|
}
|
|
case "file":
|
|
// TODO: handle hard links
|
|
f, err := os.OpenFile(path, os.O_CREATE|os.O_WRONLY, 0600)
|
|
defer f.Close()
|
|
if err != nil {
|
|
return arrar.Annotate(err, "OpenFile")
|
|
}
|
|
|
|
for _, blobid := range node.Content {
|
|
blob, err := m.FindID(blobid)
|
|
if err != nil {
|
|
return arrar.Annotate(err, "Find Blob")
|
|
}
|
|
|
|
buf, err := s.Load(backend.Data, blob)
|
|
if err != nil {
|
|
return arrar.Annotate(err, "Load")
|
|
}
|
|
|
|
_, err = f.Write(buf)
|
|
if err != nil {
|
|
return arrar.Annotate(err, "Write")
|
|
}
|
|
}
|
|
|
|
f.Close()
|
|
|
|
err = os.Lchown(path, int(node.UID), int(node.GID))
|
|
if err != nil {
|
|
return arrar.Annotate(err, "Lchown")
|
|
}
|
|
|
|
var utimes = []syscall.Timespec{
|
|
syscall.NsecToTimespec(node.AccessTime.UnixNano()),
|
|
syscall.NsecToTimespec(node.ModTime.UnixNano()),
|
|
}
|
|
err = syscall.UtimesNano(path, utimes)
|
|
if err != nil {
|
|
return arrar.Annotate(err, "Utimesnano")
|
|
}
|
|
case "symlink":
|
|
err := os.Symlink(node.LinkTarget, path)
|
|
if err != nil {
|
|
return arrar.Annotate(err, "Symlink")
|
|
}
|
|
|
|
err = os.Lchown(path, int(node.UID), int(node.GID))
|
|
if err != nil {
|
|
return arrar.Annotate(err, "Lchown")
|
|
}
|
|
|
|
// f, err := os.OpenFile(path, O_PATH|syscall.O_NOFOLLOW, 0600)
|
|
// defer f.Close()
|
|
// if err != nil {
|
|
// return arrar.Annotate(err, "OpenFile")
|
|
// }
|
|
|
|
// TODO: Get Futimes() working on older Linux kernels (fails with 3.2.0)
|
|
// var utimes = []syscall.Timeval{
|
|
// syscall.NsecToTimeval(node.AccessTime.UnixNano()),
|
|
// syscall.NsecToTimeval(node.ModTime.UnixNano()),
|
|
// }
|
|
// err = syscall.Futimes(int(f.Fd()), utimes)
|
|
// if err != nil {
|
|
// return arrar.Annotate(err, "Futimes")
|
|
// }
|
|
|
|
return nil
|
|
case "dev":
|
|
err := node.createDevAt(path)
|
|
if err != nil {
|
|
return arrar.Annotate(err, "Mknod")
|
|
}
|
|
case "chardev":
|
|
err := node.createCharDevAt(path)
|
|
if err != nil {
|
|
return arrar.Annotate(err, "Mknod")
|
|
}
|
|
case "fifo":
|
|
err := node.createFifoAt(path)
|
|
if err != nil {
|
|
return arrar.Annotate(err, "Mkfifo")
|
|
}
|
|
case "socket":
|
|
// nothing to do, we do not restore sockets
|
|
return nil
|
|
default:
|
|
return fmt.Errorf("filetype %q not implemented!\n", node.Type)
|
|
}
|
|
|
|
err := os.Chmod(path, node.Mode)
|
|
if err != nil {
|
|
return arrar.Annotate(err, "Chmod")
|
|
}
|
|
|
|
err = os.Chown(path, int(node.UID), int(node.GID))
|
|
if err != nil {
|
|
return arrar.Annotate(err, "Chown")
|
|
}
|
|
|
|
err = os.Chtimes(path, node.AccessTime, node.ModTime)
|
|
if err != nil {
|
|
return arrar.Annotate(err, "Chtimes")
|
|
}
|
|
|
|
return nil
|
|
}
|
|
|
|
func (node Node) SameContent(olderNode *Node) bool {
|
|
// if this node has a type other than "file", treat as if content has changed
|
|
if node.Type != "file" {
|
|
return false
|
|
}
|
|
|
|
// if the name or type has changed, this is surely something different
|
|
if node.Name != olderNode.Name || node.Type != olderNode.Type {
|
|
return false
|
|
}
|
|
|
|
// if timestamps or inodes differ, content has changed
|
|
if node.ModTime != olderNode.ModTime ||
|
|
node.ChangeTime != olderNode.ChangeTime ||
|
|
node.Inode != olderNode.Inode {
|
|
return false
|
|
}
|
|
|
|
// otherwise the node is assumed to have the same content
|
|
return true
|
|
}
|
|
|
|
func (node Node) MarshalJSON() ([]byte, error) {
|
|
type nodeJSON Node
|
|
nj := nodeJSON(node)
|
|
name := strconv.Quote(node.Name)
|
|
nj.Name = name[1 : len(name)-1]
|
|
|
|
return json.Marshal(nj)
|
|
}
|
|
|
|
func (node *Node) UnmarshalJSON(data []byte) error {
|
|
type nodeJSON Node
|
|
var nj *nodeJSON = (*nodeJSON)(node)
|
|
|
|
err := json.Unmarshal(data, nj)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
|
|
nj.Name, err = strconv.Unquote(`"` + nj.Name + `"`)
|
|
return err
|
|
}
|
|
|
|
func (node Node) Equals(other Node) bool {
|
|
// TODO: add generatored code for this
|
|
if node.Name != other.Name {
|
|
return false
|
|
}
|
|
if node.Type != other.Type {
|
|
return false
|
|
}
|
|
if node.Mode != other.Mode {
|
|
return false
|
|
}
|
|
if node.ModTime != other.ModTime {
|
|
return false
|
|
}
|
|
if node.AccessTime != other.AccessTime {
|
|
return false
|
|
}
|
|
if node.ChangeTime != other.ChangeTime {
|
|
return false
|
|
}
|
|
if node.UID != other.UID {
|
|
return false
|
|
}
|
|
if node.GID != other.GID {
|
|
return false
|
|
}
|
|
if node.User != other.User {
|
|
return false
|
|
}
|
|
if node.Group != other.Group {
|
|
return false
|
|
}
|
|
if node.Inode != other.Inode {
|
|
return false
|
|
}
|
|
if node.Size != other.Size {
|
|
return false
|
|
}
|
|
if node.Links != other.Links {
|
|
return false
|
|
}
|
|
if node.LinkTarget != other.LinkTarget {
|
|
return false
|
|
}
|
|
if node.Device != other.Device {
|
|
return false
|
|
}
|
|
if node.Content != nil && other.Content == nil {
|
|
return false
|
|
} else if node.Content == nil && other.Content != nil {
|
|
return false
|
|
} else if node.Content != nil && other.Content != nil {
|
|
if len(node.Content) != len(other.Content) {
|
|
return false
|
|
}
|
|
|
|
for i := 0; i < len(node.Content); i++ {
|
|
if !node.Content[i].Equal(other.Content[i]) {
|
|
return false
|
|
}
|
|
}
|
|
}
|
|
|
|
if !node.Subtree.Equal(other.Subtree) {
|
|
return false
|
|
}
|
|
|
|
if node.Error != other.Error {
|
|
return false
|
|
}
|
|
|
|
return true
|
|
}
|