func addSymlink(dirent *filesystem.DirectoryEntry,
fileSystem, oldFS *FileSystem,
directoryPathName string, stat *syscall.Stat_t) error {
if inode, ok := fileSystem.InodeTable[stat.Ino]; ok {
if inode, ok := inode.(*filesystem.SymlinkInode); ok {
dirent.SetInode(inode)
return nil
}
return errors.New("Inode changed type: " + dirent.Name)
}
inode := makeSymlinkInode(stat)
err := scanSymlinkInode(inode, fileSystem,
path.Join(directoryPathName, dirent.Name))
if err != nil {
return err
}
if oldFS != nil && oldFS.InodeTable != nil {
if oldInode, found := oldFS.InodeTable[stat.Ino]; found {
if oldInode, ok := oldInode.(*filesystem.SymlinkInode); ok {
if filesystem.CompareSymlinkInodes(inode, oldInode, nil) {
inode = oldInode
}
}
}
}
dirent.SetInode(inode)
fileSystem.InodeTable[stat.Ino] = inode
return nil
}
func addDirectory(dirent, oldDirent *filesystem.DirectoryEntry,
fileSystem, oldFS *FileSystem,
directoryPathName string, stat *syscall.Stat_t) error {
myPathName := path.Join(directoryPathName, dirent.Name)
if stat.Ino == fileSystem.inodeNumber {
return errors.New("Recursive directory: " + myPathName)
}
if _, ok := fileSystem.InodeTable[stat.Ino]; ok {
return errors.New("Hardlinked directory: " + myPathName)
}
inode := new(filesystem.DirectoryInode)
dirent.SetInode(inode)
fileSystem.InodeTable[stat.Ino] = inode
inode.Mode = filesystem.FileMode(stat.Mode)
inode.Uid = stat.Uid
inode.Gid = stat.Gid
var oldInode *filesystem.DirectoryInode
if oldDirent != nil {
if oi, ok := oldDirent.Inode().(*filesystem.DirectoryInode); ok {
oldInode = oi
}
}
err, copied := scanDirectory(inode, oldInode, fileSystem, oldFS, myPathName)
if err != nil {
return err
}
if copied && filesystem.CompareDirectoriesMetadata(inode, oldInode, nil) {
dirent.SetInode(oldInode)
fileSystem.InodeTable[stat.Ino] = oldInode
}
fileSystem.DirectoryCount++
return nil
}
func (decoderData *decoderData) addEntry(parent *filesystem.DirectoryInode,
fullName, name string, inode filesystem.GenericInode) {
var newEntry filesystem.DirectoryEntry
newEntry.Name = name
newEntry.InodeNumber = decoderData.nextInodeNumber
newEntry.SetInode(inode)
parent.EntryList = append(parent.EntryList, &newEntry)
decoderData.addInode(fullName, inode)
}
func addSpecialFile(dirent *filesystem.DirectoryEntry,
fileSystem, oldFS *FileSystem, stat *syscall.Stat_t) error {
if inode, ok := fileSystem.InodeTable[stat.Ino]; ok {
if inode, ok := inode.(*filesystem.SpecialInode); ok {
dirent.SetInode(inode)
return nil
}
return errors.New("Inode changed type: " + dirent.Name)
}
inode := makeSpecialInode(stat)
if oldFS != nil && oldFS.InodeTable != nil {
if oldInode, found := oldFS.InodeTable[stat.Ino]; found {
if oldInode, ok := oldInode.(*filesystem.SpecialInode); ok {
if filesystem.CompareSpecialInodes(inode, oldInode, nil) {
inode = oldInode
}
}
}
}
dirent.SetInode(inode)
fileSystem.InodeTable[stat.Ino] = inode
return nil
}
// Returns true if there is a failure due to missing computed files.
func (sub *Sub) compareDirectories(request *subproto.UpdateRequest,
subDirectory, requiredDirectory *filesystem.DirectoryInode,
myPathName string, deleteMissingComputedFiles bool,
logger *log.Logger) bool {
// First look for entries that should be deleted.
if sub.filter != nil && subDirectory != nil {
for name := range subDirectory.EntriesByName {
pathname := path.Join(myPathName, name)
if sub.filter.Match(pathname) {
continue
}
if _, ok := requiredDirectory.EntriesByName[name]; !ok {
request.PathsToDelete = append(request.PathsToDelete, pathname)
}
}
}
for name, requiredEntry := range requiredDirectory.EntriesByName {
pathname := path.Join(myPathName, name)
if sub.filter != nil && sub.filter.Match(pathname) {
continue
}
var subEntry *filesystem.DirectoryEntry
if subDirectory != nil {
if se, ok := subDirectory.EntriesByName[name]; ok {
subEntry = se
}
}
requiredInode := requiredEntry.Inode()
if _, ok := requiredInode.(*filesystem.ComputedRegularInode); ok {
// Replace with computed file.
inode, ok := sub.ComputedInodes[pathname]
if !ok {
if deleteMissingComputedFiles {
if subEntry != nil {
request.PathsToDelete = append(request.PathsToDelete,
pathname)
}
continue
}
logger.Printf(
"compareDirectories(%s): missing computed file: %s\n",
sub, pathname)
return true
}
setComputedFileMtime(inode, subEntry)
newEntry := new(filesystem.DirectoryEntry)
newEntry.Name = name
newEntry.InodeNumber = requiredEntry.InodeNumber
newEntry.SetInode(inode)
requiredEntry = newEntry
}
if subEntry == nil {
sub.addEntry(request, requiredEntry, pathname)
} else {
sub.compareEntries(request, subEntry, requiredEntry, pathname)
}
// If a directory: descend (possibly with the directory for the sub).
if requiredInode, ok := requiredInode.(*filesystem.DirectoryInode); ok {
var subInode *filesystem.DirectoryInode
if subEntry != nil {
if si, ok := subEntry.Inode().(*filesystem.DirectoryInode); ok {
subInode = si
}
}
sub.compareDirectories(request, subInode, requiredInode, pathname,
deleteMissingComputedFiles, logger)
}
}
return false
}