func scanSymlink(symlink *filesystem.Symlink, fileSystem *FileSystem,
parentName string) error {
myPathName := path.Join(parentName, symlink.Name)
target, err := os.Readlink(path.Join(fileSystem.rootDirectoryName,
myPathName))
if err != nil {
return err
}
symlink.Inode().Symlink = target
return nil
}
func (decoderData *decoderData) addSymlink(header *tar.Header,
parent *filesystem.Directory, name string) error {
var newInode filesystem.SymlinkInode
newInode.Uid = uint32(header.Uid)
newInode.Gid = uint32(header.Gid)
newInode.Symlink = header.Linkname
decoderData.symlinkInodeTable[header.Name] = decoderData.nextInodeNumber
decoderData.fileSystem.SymlinkInodeTable[decoderData.nextInodeNumber] =
&newInode
var newEntry filesystem.Symlink
newEntry.Name = name
newEntry.InodeNumber = decoderData.nextInodeNumber
parent.SymlinkList = append(parent.SymlinkList, &newEntry)
decoderData.nextInodeNumber++
return nil
}
func addSymlink(directory *filesystem.Directory, fileSystem, oldFS *FileSystem,
name string, directoryPathName string, stat *syscall.Stat_t) error {
inode, isNewInode := fileSystem.getSymlinkInode(stat)
var symlink filesystem.Symlink
symlink.Name = name
symlink.InodeNumber = stat.Ino
symlink.SetInode(inode)
if isNewInode {
err := scanSymlink(&symlink, fileSystem, directoryPathName)
if err != nil {
return err
}
if oldFS != nil && oldFS.SymlinkInodeTable != nil {
if oldInode, found := oldFS.SymlinkInodeTable[stat.Ino]; found {
if filesystem.CompareSymlinkInodes(inode, oldInode, nil) {
inode = oldInode
symlink.SetInode(inode)
fileSystem.SymlinkInodeTable[stat.Ino] = inode
}
}
}
}
directory.SymlinkList = append(directory.SymlinkList, &symlink)
return nil
}
func (decoderData *decoderData) addHardlink(header *tar.Header,
parent *filesystem.Directory, name string) error {
header.Linkname = normaliseFilename(header.Linkname)
if inum, ok := decoderData.regularInodeTable[header.Linkname]; ok {
var newEntry filesystem.RegularFile
newEntry.Name = name
newEntry.InodeNumber = inum
parent.RegularFileList = append(parent.RegularFileList, &newEntry)
} else if inum, ok := decoderData.symlinkInodeTable[header.Linkname]; ok {
var newEntry filesystem.Symlink
newEntry.Name = name
newEntry.InodeNumber = inum
parent.SymlinkList = append(parent.SymlinkList, &newEntry)
} else if inum, ok := decoderData.inodeTable[header.Linkname]; ok {
var newEntry filesystem.File
newEntry.Name = name
newEntry.InodeNumber = inum
parent.FileList = append(parent.FileList, &newEntry)
} else {
return errors.New(fmt.Sprintf("missing hardlink target: %s",
header.Linkname))
}
return nil
}
func compareSymlink(request *subproto.UpdateRequest, state *state,
subEntry interface{}, requiredSymlink *filesystem.Symlink,
parentName string) {
debugFilename := path.Join(parentName, requiredSymlink.Name)
if subSymlink, ok := subEntry.(*filesystem.Symlink); ok {
if requiredInode, ok :=
state.subInodeToRequiredInode[subSymlink.InodeNumber]; ok {
if requiredInode != requiredSymlink.InodeNumber {
fmt.Printf("Different links: %s...\n", debugFilename) // HACK
}
} else {
state.subInodeToRequiredInode[subSymlink.InodeNumber] =
requiredSymlink.InodeNumber
}
if filesystem.CompareSymlinkInodes(subSymlink.Inode(),
requiredSymlink.Inode(), os.Stdout) {
return
}
fmt.Printf("Different symlink: %s...\n", debugFilename) // HACK
} else {
fmt.Printf("Add symlink: %s...\n", debugFilename) // HACK
}
// TODO(rgooch): Delete entry and replace.
}