func nativeFileIterator(fn Iterator) Iterator {
return func(fi FileIntf) bool {
switch f := fi.(type) {
case protocol.FileInfo:
f.Name = osutil.NativeFilename(f.Name)
return fn(f)
case FileInfoTruncated:
f.Name = osutil.NativeFilename(f.Name)
return fn(f)
default:
panic("unknown interface type")
}
}
}
func init() {
defer func() {
if err := recover(); err != nil {
// Ensure that the supported flag is disabled when we hit an
// error, even though it should already be. Also, silently swallow
// the error since it's fine for a system not to support symlinks.
Supported = false
}
}()
// Needs administrator privileges.
// Let's check that everything works.
// This could be done more officially:
// http://stackoverflow.com/questions/2094663/determine-if-windows-process-has-privilege-to-create-symbolic-link
// But I don't want to define 10 more structs just to look this up.
base := os.TempDir()
path := filepath.Join(base, "symlinktest")
defer os.Remove(path)
err := Create(path, base, protocol.FlagDirectory)
if err != nil {
return
}
stat, err := osutil.Lstat(path)
if err != nil || stat.Mode()&os.ModeSymlink == 0 {
return
}
target, flags, err := Read(path)
if err != nil || osutil.NativeFilename(target) != base || flags&protocol.FlagDirectory == 0 {
return
}
Supported = true
}
func (s *FileSet) GetGlobalTruncated(file string) (FileInfoTruncated, bool) {
fi, ok := ldbGetGlobal(s.db, []byte(s.folder), []byte(osutil.NormalizedFilename(file)), true)
if !ok {
return FileInfoTruncated{}, false
}
f := fi.(FileInfoTruncated)
f.Name = osutil.NativeFilename(f.Name)
return f, true
}
func (s *FileSet) GetGlobal(file string) (protocol.FileInfo, bool) {
fi, ok := ldbGetGlobal(s.db, []byte(s.folder), []byte(osutil.NormalizedFilename(file)), false)
if !ok {
return protocol.FileInfo{}, false
}
f := fi.(protocol.FileInfo)
f.Name = osutil.NativeFilename(f.Name)
return f, true
}
// Iterate takes an iterator function which iterates over all matching blocks
// for the given hash. The iterator function has to return either true (if
// they are happy with the block) or false to continue iterating for whatever
// reason. The iterator finally returns the result, whether or not a
// satisfying block was eventually found.
func (f *BlockFinder) Iterate(folders []string, hash []byte, iterFn func(string, string, int32) bool) bool {
for _, folder := range folders {
key := toBlockKey(hash, folder, "")
iter := f.db.NewIterator(util.BytesPrefix(key), nil)
defer iter.Release()
for iter.Next() && iter.Error() == nil {
folder, file := fromBlockKey(iter.Key())
index := int32(binary.BigEndian.Uint32(iter.Value()))
if iterFn(folder, osutil.NativeFilename(file), index) {
return true
}
}
}
return false
}
func Create(source, target string, flags uint32) error {
srcp, err := syscall.UTF16PtrFromString(source)
if err != nil {
return err
}
trgp, err := syscall.UTF16PtrFromString(osutil.NativeFilename(target))
if err != nil {
return err
}
// Sadly for Windows we need to specify the type of the symlink,
// whether it's a directory symlink or a file symlink.
// If the flags doesn't reveal the target type, try to evaluate it
// ourselves, and worst case default to the symlink pointing to a file.
mode := 0
if flags&protocol.FlagSymlinkMissingTarget != 0 {
path := target
if !filepath.IsAbs(target) {
path = filepath.Join(filepath.Dir(source), target)
}
stat, err := os.Stat(path)
if err == nil && stat.IsDir() {
mode = Win32SymbolicLinkFlagDirectory
}
} else if flags&protocol.FlagDirectory != 0 {
mode = Win32SymbolicLinkFlagDirectory
}
r0, _, err := syscall.Syscall(procCreateSymbolicLink.Addr(), 3, uintptr(unsafe.Pointer(srcp)), uintptr(unsafe.Pointer(trgp)), uintptr(mode))
if r0 == 1 {
return nil
}
return err
}
func Create(source, target string, tt TargetType) error {
return os.Symlink(osutil.NativeFilename(target), source)
}
func (s *FileSet) Get(device protocol.DeviceID, file string) (protocol.FileInfo, bool) {
f, ok := ldbGet(s.db, []byte(s.folder), device[:], []byte(osutil.NormalizedFilename(file)))
f.Name = osutil.NativeFilename(f.Name)
return f, ok
}
func Create(source, target string, flags uint32) error {
return os.Symlink(osutil.NativeFilename(target), source)
}