sftpd: remove workarounds for directory listing

The underlying issue was fixed in pkg/sftp 1.13.2

vfs/fileinfo.go

@@ -65,5 +65,5 @@ func (fi *FileInfo) SetMode(mode os.FileMode) {
 
 // Sys provides the underlying data source (can return nil)
 func (fi *FileInfo) Sys() interface{} {
-	return fi.getFileInfoSys()
+	return nil
 }

vfs/sftpfs.go

@@ -206,13 +206,7 @@ func (fs *SFTPFs) Stat(name string) (os.FileInfo, error) {
 	if err := fs.checkConnection(); err != nil {
 		return nil, err
 	}
-	info, err := fs.sftpClient.Stat(name)
-	if err != nil {
-		return nil, err
-	}
-	fi := NewFileInfo(info.Name(), info.IsDir(), info.Size(), info.ModTime(), false)
-	fi.SetMode(info.Mode())
-	return fi, nil
+	return fs.sftpClient.Stat(name)
 }
 
 // Lstat returns a FileInfo describing the named file
@@ -220,13 +214,7 @@ func (fs *SFTPFs) Lstat(name string) (os.FileInfo, error) {
 	if err := fs.checkConnection(); err != nil {
 		return nil, err
 	}
-	info, err := fs.sftpClient.Lstat(name)
-	if err != nil {
-		return nil, err
-	}
-	fi := NewFileInfo(info.Name(), info.IsDir(), info.Size(), info.ModTime(), false)
-	fi.SetMode(info.Mode())
-	return fi, nil
+	return fs.sftpClient.Lstat(name)
 }
 
 // Open opens the named file for reading
@@ -407,18 +395,7 @@ func (fs *SFTPFs) ReadDir(dirname string) ([]os.FileInfo, error) {
 	if err := fs.checkConnection(); err != nil {
 		return nil, err
 	}
-	entries, err := fs.sftpClient.ReadDir(dirname)
-	if err != nil {
-		return nil, err
-	}
-	result := make([]os.FileInfo, 0, len(entries))
-
-	for _, entry := range entries {
-		info := NewFileInfo(entry.Name(), entry.IsDir(), entry.Size(), entry.ModTime(), false)
-		info.SetMode(entry.Mode())
-		result = append(result, info)
-	}
-	return result, nil
+	return fs.sftpClient.ReadDir(dirname)
 }
 
 // IsUploadResumeSupported returns true if resuming uploads is supported.

vfs/sys_unix.go

@@ -4,33 +4,10 @@ package vfs
 
 import (
 	"errors"
-	"os"
-	"syscall"
 
 	"golang.org/x/sys/unix"
 )
 
-var (
-	defaultUID, defaultGID int
-)
-
-func init() {
-	defaultUID = os.Getuid()
-	defaultGID = os.Getuid()
-	if defaultUID < 0 {
-		defaultUID = 65534
-	}
-	if defaultGID < 0 {
-		defaultGID = 65534
-	}
-}
-
-func (fi FileInfo) getFileInfoSys() interface{} {
-	return &syscall.Stat_t{
-		Uid: uint32(defaultUID),
-		Gid: uint32(defaultGID)}
-}
-
 func isCrossDeviceError(err error) bool {
 	return errors.Is(err, unix.EXDEV)
 }

vfs/sys_windows.go

@@ -2,15 +2,10 @@ package vfs
 
 import (
 	"errors"
-	"syscall"
 
 	"golang.org/x/sys/windows"
 )
 
-func (fi FileInfo) getFileInfoSys() interface{} {
-	return syscall.Win32FileAttributeData{}
-}
-
 func isCrossDeviceError(err error) bool {
 	return errors.Is(err, windows.ERROR_NOT_SAME_DEVICE)
 }