Update dependencies

Closes #2129

vendor/github.com/pkg/sftp/request-example.go

@@ -12,6 +12,7 @@ import (
 	"path/filepath"
 	"sort"
 	"sync"
+	"syscall"
 	"time"
 )
 
@@ -29,6 +30,7 @@ func (fs *root) Fileread(r *Request) (io.ReaderAt, error) {
 	if fs.mockErr != nil {
 		return nil, fs.mockErr
 	}
+	_ = r.WithContext(r.Context()) // initialize context for deadlock testing
 	fs.filesLock.Lock()
 	defer fs.filesLock.Unlock()
 	file, err := fs.fetch(r.Filepath)
@@ -48,6 +50,7 @@ func (fs *root) Filewrite(r *Request) (io.WriterAt, error) {
 	if fs.mockErr != nil {
 		return nil, fs.mockErr
 	}
+	_ = r.WithContext(r.Context()) // initialize context for deadlock testing
 	fs.filesLock.Lock()
 	defer fs.filesLock.Unlock()
 	file, err := fs.fetch(r.Filepath)
@@ -69,6 +72,7 @@ func (fs *root) Filecmd(r *Request) error {
 	if fs.mockErr != nil {
 		return fs.mockErr
 	}
+	_ = r.WithContext(r.Context()) // initialize context for deadlock testing
 	fs.filesLock.Lock()
 	defer fs.filesLock.Unlock()
 	switch r.Method {
@@ -129,11 +133,20 @@ func (fs *root) Filelist(r *Request) (ListerAt, error) {
 	if fs.mockErr != nil {
 		return nil, fs.mockErr
 	}
+	_ = r.WithContext(r.Context()) // initialize context for deadlock testing
 	fs.filesLock.Lock()
 	defer fs.filesLock.Unlock()
 
+	file, err := fs.fetch(r.Filepath)
+	if err != nil {
+		return nil, err
+	}
+
 	switch r.Method {
 	case "List":
+		if !file.IsDir() {
+			return nil, syscall.ENOTDIR
+		}
 		ordered_names := []string{}
 		for fn, _ := range fs.files {
 			if filepath.Dir(fn) == r.Filepath {
@@ -147,16 +160,8 @@ func (fs *root) Filelist(r *Request) (ListerAt, error) {
 		}
 		return listerat(list), nil
 	case "Stat":
-		file, err := fs.fetch(r.Filepath)
-		if err != nil {
-			return nil, err
-		}
 		return listerat([]os.FileInfo{file}), nil
 	case "Readlink":
-		file, err := fs.fetch(r.Filepath)
-		if err != nil {
-			return nil, err
-		}
 		if file.symlink != "" {
 			file, err = fs.fetch(file.symlink)
 			if err != nil {