(gnus-blocked-images): Clarify privacy implications

[emacs.git] / lisp / net / tramp-smb.el

;;; tramp-smb.el --- Tramp access functions for SMB servers  -*- lexical-binding:t -*-

;; Copyright (C) 2002-2018 Free Software Foundation, Inc.

;; Author: Michael Albinus <michael.albinus@gmx.de>
;; Keywords: comm, processes
;; Package: tramp

;; This file is part of GNU Emacs.

;; GNU Emacs is free software: you can redistribute it and/or modify
;; it under the terms of the GNU General Public License as published by
;; the Free Software Foundation, either version 3 of the License, or
;; (at your option) any later version.

;; GNU Emacs is distributed in the hope that it will be useful,
;; but WITHOUT ANY WARRANTY; without even the implied warranty of
;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
;; GNU General Public License for more details.

;; You should have received a copy of the GNU General Public License
;; along with GNU Emacs.  If not, see <https://www.gnu.org/licenses/>.

;;; Commentary:

;; Access functions for SMB servers like SAMBA or M$ Windows from Tramp.

;;; Code:

(eval-when-compile (require 'cl-lib))
(require 'tramp)

;; Define SMB method ...
;;;###tramp-autoload
(defconst tramp-smb-method "smb"
  "Method to connect SAMBA and M$ SMB servers.")

;; ... and add it to the method list.
;;;###tramp-autoload
(unless (memq system-type '(cygwin windows-nt))
  (add-to-list 'tramp-methods
    `(,tramp-smb-method
      ;; We define an empty command, because `tramp-smb-call-winexe'
      ;; opens already the powershell.  Used in `tramp-handle-shell-command'.
      (tramp-remote-shell "")
      ;; This is just a guess.  We don't know whether the share "C$"
      ;; is available for public use, and whether the user has write
      ;; access.
      (tramp-tmpdir "/C$/Temp")
      ;; Another guess.  We might implement a better check later on.
      (tramp-case-insensitive t))))

;; Add a default for `tramp-default-user-alist'. Rule: For the SMB method,
;; the anonymous user is chosen.
;;;###tramp-autoload
(add-to-list 'tramp-default-user-alist
             `(,(concat "\\`" tramp-smb-method "\\'") nil nil))

;; Add completion function for SMB method.
;;;###tramp-autoload
(eval-after-load 'tramp
  '(tramp-set-completion-function
    tramp-smb-method
    '((tramp-parse-netrc "~/.netrc"))))

;;;###tramp-autoload
(defcustom tramp-smb-program "smbclient"
  "Name of SMB client to run."
  :group 'tramp
  :type 'string
  :require 'tramp)

;;;###tramp-autoload
(defcustom tramp-smb-acl-program "smbcacls"
  "Name of SMB acls to run."
  :group 'tramp
  :type 'string
  :version "24.4"
  :require 'tramp)

;;;###tramp-autoload
(defcustom tramp-smb-conf "/dev/null"
  "Path of the smb.conf file.
If it is nil, no smb.conf will be added to the `tramp-smb-program'
call, letting the SMB client use the default one."
  :group 'tramp
  :type '(choice (const nil) (file :must-match t))
  :require 'tramp)

(defvar tramp-smb-version nil
  "Version string of the SMB client.")

(defconst tramp-smb-server-version
  "Domain=\\[[^]]*\\] OS=\\[[^]]*\\] Server=\\[[^]]*\\]"
  "Regexp of SMB server identification.")

(defconst tramp-smb-prompt "^\\(smb:\\|PS\\) .+> \\|^\\s-+Server\\s-+Comment$"
  "Regexp used as prompt in smbclient or powershell.")

(defconst tramp-smb-wrong-passwd-regexp
  (regexp-opt
   '("NT_STATUS_LOGON_FAILURE"
     "NT_STATUS_WRONG_PASSWORD"))
  "Regexp for login error strings of SMB servers.")

(defconst tramp-smb-errors
  (mapconcat
   'identity
   `(;; Connection error / timeout / unknown command.
     "Connection\\( to \\S-+\\)? failed"
     "Read from server failed, maybe it closed the connection"
     "Call timed out: server did not respond"
     "\\S-+: command not found"
     "Server doesn't support UNIX CIFS calls"
     ,(regexp-opt
       '(;; Samba.
         "ERRDOS"
         "ERRHRD"
         "ERRSRV"
         "ERRbadfile"
         "ERRbadpw"
         "ERRfilexists"
         "ERRnoaccess"
         "ERRnomem"
         "ERRnosuchshare"
         ;; See /usr/include/samba-4.0/core/ntstatus.h.
         ;; Windows 4.0 (Windows NT), Windows 5.0 (Windows 2000),
         ;; Windows 5.1 (Windows XP), Windows 5.2 (Windows Server 2003),
         ;; Windows 6.0 (Windows Vista), Windows 6.1 (Windows 7),
         ;; Windows 6.3 (Windows Server 2012, Windows 10).
         "NT_STATUS_ACCESS_DENIED"
         "NT_STATUS_ACCOUNT_LOCKED_OUT"
         "NT_STATUS_BAD_NETWORK_NAME"
         "NT_STATUS_CANNOT_DELETE"
         "NT_STATUS_CONNECTION_DISCONNECTED"
         "NT_STATUS_CONNECTION_REFUSED"
         "NT_STATUS_CONNECTION_RESET"
         "NT_STATUS_DIRECTORY_NOT_EMPTY"
         "NT_STATUS_DUPLICATE_NAME"
         "NT_STATUS_FILE_IS_A_DIRECTORY"
         "NT_STATUS_HOST_UNREACHABLE"
         "NT_STATUS_IMAGE_ALREADY_LOADED"
         "NT_STATUS_INVALID_LEVEL"
         "NT_STATUS_INVALID_PARAMETER_MIX"
         "NT_STATUS_IO_TIMEOUT"
         "NT_STATUS_LOGON_FAILURE"
         "NT_STATUS_NETWORK_ACCESS_DENIED"
         "NT_STATUS_NOT_IMPLEMENTED"
         "NT_STATUS_NO_LOGON_SERVERS"
         "NT_STATUS_NO_SUCH_FILE"
         "NT_STATUS_NO_SUCH_USER"
         "NT_STATUS_OBJECT_NAME_COLLISION"
         "NT_STATUS_OBJECT_NAME_INVALID"
         "NT_STATUS_OBJECT_NAME_NOT_FOUND"
         "NT_STATUS_OBJECT_PATH_SYNTAX_BAD"
         "NT_STATUS_PASSWORD_MUST_CHANGE"
         "NT_STATUS_RESOURCE_NAME_NOT_FOUND"
         "NT_STATUS_REVISION_MISMATCH"
         "NT_STATUS_SHARING_VIOLATION"
         "NT_STATUS_TRUSTED_RELATIONSHIP_FAILURE"
         "NT_STATUS_UNSUCCESSFUL"
         "NT_STATUS_WRONG_PASSWORD")))
   "\\|")
  "Regexp for possible error strings of SMB servers.
Used instead of analyzing error codes of commands.")

(defconst tramp-smb-actions-with-share
  '((tramp-smb-prompt tramp-action-succeed)
    (tramp-password-prompt-regexp tramp-action-password)
    (tramp-wrong-passwd-regexp tramp-action-permission-denied)
    (tramp-smb-errors tramp-action-permission-denied)
    (tramp-process-alive-regexp tramp-action-process-alive))
  "List of pattern/action pairs.
This list is used for login to SMB servers.

See `tramp-actions-before-shell' for more info.")

(defconst tramp-smb-actions-without-share
  '((tramp-password-prompt-regexp tramp-action-password)
    (tramp-wrong-passwd-regexp tramp-action-permission-denied)
    (tramp-smb-errors tramp-action-permission-denied)
    (tramp-process-alive-regexp tramp-action-out-of-band))
  "List of pattern/action pairs.
This list is used for login to SMB servers.

See `tramp-actions-before-shell' for more info.")

(defconst tramp-smb-actions-with-tar
  '((tramp-password-prompt-regexp tramp-action-password)
    (tramp-wrong-passwd-regexp tramp-action-permission-denied)
    (tramp-smb-errors tramp-action-permission-denied)
    (tramp-process-alive-regexp tramp-smb-action-with-tar))
  "List of pattern/action pairs.
This list is used for tar-like copy of directories.

See `tramp-actions-before-shell' for more info.")

(defconst tramp-smb-actions-get-acl
  '((tramp-password-prompt-regexp tramp-action-password)
    (tramp-wrong-passwd-regexp tramp-action-permission-denied)
    (tramp-smb-errors tramp-action-permission-denied)
    (tramp-process-alive-regexp tramp-smb-action-get-acl))
  "List of pattern/action pairs.
This list is used for smbcacls actions.

See `tramp-actions-before-shell' for more info.")

(defconst tramp-smb-actions-set-acl
  '((tramp-password-prompt-regexp tramp-action-password)
    (tramp-wrong-passwd-regexp tramp-action-permission-denied)
    (tramp-smb-errors tramp-action-permission-denied)
    (tramp-process-alive-regexp tramp-smb-action-set-acl))
  "List of pattern/action pairs.
This list is used for smbcacls actions.

See `tramp-actions-before-shell' for more info.")

;; New handlers should be added here.
;;;###tramp-autoload
(defconst tramp-smb-file-name-handler-alist
  '(;; `access-file' performed by default handler.
    (add-name-to-file . tramp-smb-handle-add-name-to-file)
    ;; `byte-compiler-base-file-name' performed by default handler.
    (copy-directory . tramp-smb-handle-copy-directory)
    (copy-file . tramp-smb-handle-copy-file)
    (delete-directory . tramp-smb-handle-delete-directory)
    (delete-file . tramp-smb-handle-delete-file)
    ;; `diff-latest-backup-file' performed by default handler.
    (directory-file-name . tramp-handle-directory-file-name)
    (directory-files . tramp-smb-handle-directory-files)
    (directory-files-and-attributes
     . tramp-handle-directory-files-and-attributes)
    (dired-compress-file . ignore)
    (dired-uncache . tramp-handle-dired-uncache)
    (expand-file-name . tramp-smb-handle-expand-file-name)
    (file-accessible-directory-p . tramp-handle-file-accessible-directory-p)
    (file-acl . tramp-smb-handle-file-acl)
    (file-attributes . tramp-smb-handle-file-attributes)
    (file-directory-p .  tramp-handle-file-directory-p)
    (file-file-equal-p . tramp-handle-file-equal-p)
    (file-executable-p . tramp-handle-file-exists-p)
    (file-exists-p . tramp-handle-file-exists-p)
    (file-in-directory-p . tramp-handle-file-in-directory-p)
    (file-local-copy . tramp-smb-handle-file-local-copy)
    (file-modes . tramp-handle-file-modes)
    (file-name-all-completions . tramp-smb-handle-file-name-all-completions)
    (file-name-as-directory . tramp-handle-file-name-as-directory)
    (file-name-case-insensitive-p . tramp-handle-file-name-case-insensitive-p)
    (file-name-completion . tramp-handle-file-name-completion)
    (file-name-directory . tramp-handle-file-name-directory)
    (file-name-nondirectory . tramp-handle-file-name-nondirectory)
    ;; `file-name-sans-versions' performed by default handler.
    (file-newer-than-file-p . tramp-handle-file-newer-than-file-p)
    (file-notify-add-watch . tramp-handle-file-notify-add-watch)
    (file-notify-rm-watch . tramp-handle-file-notify-rm-watch)
    (file-notify-valid-p . tramp-handle-file-notify-valid-p)
    (file-ownership-preserved-p . ignore)
    (file-readable-p . tramp-handle-file-exists-p)
    (file-regular-p . tramp-handle-file-regular-p)
    (file-remote-p . tramp-handle-file-remote-p)
    (file-selinux-context . tramp-handle-file-selinux-context)
    (file-symlink-p . tramp-handle-file-symlink-p)
    (file-system-info . tramp-smb-handle-file-system-info)
    (file-truename . tramp-handle-file-truename)
    (file-writable-p . tramp-smb-handle-file-writable-p)
    (find-backup-file-name . tramp-handle-find-backup-file-name)
    ;; `find-file-noselect' performed by default handler.
    ;; `get-file-buffer' performed by default handler.
    (insert-directory . tramp-smb-handle-insert-directory)
    (insert-file-contents . tramp-handle-insert-file-contents)
    (load . tramp-handle-load)
    (make-auto-save-file-name . tramp-handle-make-auto-save-file-name)
    (make-directory . tramp-smb-handle-make-directory)
    (make-directory-internal . tramp-smb-handle-make-directory-internal)
    (make-nearby-temp-file . tramp-handle-make-nearby-temp-file)
    (make-symbolic-link . tramp-smb-handle-make-symbolic-link)
    (process-file . tramp-smb-handle-process-file)
    (rename-file . tramp-smb-handle-rename-file)
    (set-file-acl . tramp-smb-handle-set-file-acl)
    (set-file-modes . tramp-smb-handle-set-file-modes)
    (set-file-selinux-context . ignore)
    (set-file-times . ignore)
    (set-visited-file-modtime . tramp-handle-set-visited-file-modtime)
    (shell-command . tramp-handle-shell-command)
    (start-file-process . tramp-smb-handle-start-file-process)
    (substitute-in-file-name . tramp-smb-handle-substitute-in-file-name)
    (temporary-file-directory . tramp-handle-temporary-file-directory)
    (unhandled-file-name-directory . ignore)
    (vc-registered . ignore)
    (verify-visited-file-modtime . tramp-handle-verify-visited-file-modtime)
    (write-region . tramp-smb-handle-write-region))
  "Alist of handler functions for Tramp SMB method.
Operations not mentioned here will be handled by the default Emacs primitives.")

;; Options for remote processes via winexe.
;;;###tramp-autoload
(defcustom tramp-smb-winexe-program "winexe"
  "Name of winexe client to run.
If it isn't found in the local $PATH, the absolute path of winexe
shall be given.  This is needed for remote processes."
  :group 'tramp
  :type 'string
  :version "24.3"
  :require 'tramp)

;;;###tramp-autoload
(defcustom tramp-smb-winexe-shell-command "powershell.exe"
  "Shell to be used for processes on remote machines.
This must be Powershell V2 compatible."
  :group 'tramp
  :type 'string
  :version "24.3"
  :require 'tramp)

;;;###tramp-autoload
(defcustom tramp-smb-winexe-shell-command-switch "-file -"
  "Command switch used together with `tramp-smb-winexe-shell-command'.
This can be used to disable echo etc."
  :group 'tramp
  :type 'string
  :version "24.3"
  :require 'tramp)

;; It must be a `defsubst' in order to push the whole code into
;; tramp-loaddefs.el.  Otherwise, there would be recursive autoloading.
;;;###tramp-autoload
(defsubst tramp-smb-file-name-p (filename)
  "Check if it's a filename for SMB servers."
  (string= (tramp-file-name-method (tramp-dissect-file-name filename))
           tramp-smb-method))

;;;###tramp-autoload
(defun tramp-smb-file-name-handler (operation &rest args)
  "Invoke the SMB related OPERATION.
First arg specifies the OPERATION, second arg is a list of arguments to
pass to the OPERATION."
  (let ((fn (assoc operation tramp-smb-file-name-handler-alist)))
    (if fn
        (save-match-data (apply (cdr fn) args))
      (tramp-run-real-handler operation args))))

;;;###tramp-autoload
(unless (memq system-type '(cygwin windows-nt))
  (tramp-register-foreign-file-name-handler
   'tramp-smb-file-name-p 'tramp-smb-file-name-handler))

;; File name primitives.

(defun tramp-smb-handle-add-name-to-file
  (filename newname &optional ok-if-already-exists)
  "Like `add-name-to-file' for Tramp files."
  (unless (tramp-equal-remote filename newname)
    (with-parsed-tramp-file-name
        (if (tramp-tramp-file-p filename) filename newname) nil
      (tramp-error
       v 'file-error
       "add-name-to-file: %s"
       "only implemented for same method, same user, same host")))
  (with-parsed-tramp-file-name filename v1
    (with-parsed-tramp-file-name newname v2
      (when (file-directory-p filename)
        (tramp-error
         v2 'file-error
         "add-name-to-file: %s must not be a directory" filename))
        ;; Do the 'confirm if exists' thing.
        (when (file-exists-p newname)
          ;; What to do?
          (if (or (null ok-if-already-exists) ; not allowed to exist
                  (and (numberp ok-if-already-exists)
                       (not (yes-or-no-p
                             (format
                              "File %s already exists; make it a link anyway? "
                              v2-localname)))))
              (tramp-error v2 'file-already-exists newname)
            (delete-file newname)))
      ;; We must also flush the cache of the directory, because
      ;; `file-attributes' reads the values from there.
      (tramp-flush-file-properties v2 (file-name-directory v2-localname))
      (tramp-flush-file-properties v2 v2-localname)
      (unless
          (tramp-smb-send-command
           v1
           (format
            "%s \"%s\" \"%s\""
            (if (tramp-smb-get-cifs-capabilities v1) "link" "hardlink")
            (tramp-smb-get-localname v1)
            (tramp-smb-get-localname v2)))
        (tramp-error
         v2 'file-error
         "error with add-name-to-file, see buffer `%s' for details"
         (buffer-name))))))

(defun tramp-smb-action-with-tar (proc vec)
  "Untar from connection buffer."
  (if (not (process-live-p proc))
      (throw 'tramp-action 'process-died)

    (with-current-buffer (tramp-get-connection-buffer vec)
      (goto-char (point-min))
      (when (search-forward-regexp tramp-smb-server-version nil t)
        ;; There might be a hidden password prompt.
        (widen)
        (forward-line)
        (tramp-message vec 6 (buffer-substring (point-min) (point)))
        (delete-region (point-min) (point))
        (throw 'tramp-action 'ok)))))

(defun tramp-smb-handle-copy-directory
  (dirname newname &optional keep-date parents copy-contents)
  "Like `copy-directory' for Tramp files."
  (if copy-contents
      ;; We must do it file-wise.
      (tramp-run-real-handler
       'copy-directory (list dirname newname keep-date parents copy-contents))

    (setq dirname (expand-file-name dirname)
          newname (expand-file-name newname))
    (let ((t1 (tramp-tramp-file-p dirname))
          (t2 (tramp-tramp-file-p newname)))
      (with-parsed-tramp-file-name (if t1 dirname newname) nil
        (with-tramp-progress-reporter
            v 0 (format "Copying %s to %s" dirname newname)
          (when (and (file-directory-p newname)
                     (not (tramp-compat-directory-name-p newname)))
            (tramp-error v 'file-already-exists newname))
          (cond
           ;; We must use a local temporary directory.
           ((and t1 t2)
            (let ((tmpdir
                   (make-temp-name
                    (expand-file-name
                     tramp-temp-name-prefix
                     (tramp-compat-temporary-file-directory)))))
              (unwind-protect
                  (progn
                    (make-directory tmpdir)
                    (copy-directory
                     dirname (file-name-as-directory tmpdir) keep-date 'parents)
                    (copy-directory
                     (expand-file-name (file-name-nondirectory dirname) tmpdir)
                     newname keep-date parents))
                (delete-directory tmpdir 'recursive))))

           ;; We can copy recursively.
           ;; TODO: Does not work reliably.
           (nil ;(and (or t1 t2) (tramp-smb-get-cifs-capabilities v))
            (when (and (file-directory-p newname)
                       (not (string-equal (file-name-nondirectory dirname)
                                          (file-name-nondirectory newname))))
              (setq newname
                    (expand-file-name
                     (file-name-nondirectory dirname) newname))
              (if t2 (setq v (tramp-dissect-file-name newname))))
            (if (not (file-directory-p newname))
                (make-directory newname parents))

            (let* ((share (tramp-smb-get-share v))
                   (localname (file-name-as-directory
                               (replace-regexp-in-string
                                "\\\\" "/" (tramp-smb-get-localname v))))
                   (tmpdir    (make-temp-name
                               (expand-file-name
                                tramp-temp-name-prefix
                                (tramp-compat-temporary-file-directory))))
                   (args      (list (concat "//" host "/" share) "-E"))
                   ;; We do not want to run timers.
                   timer-list timer-idle-list)

              (if (not (zerop (length user)))
                  (setq args (append args (list "-U" user)))
                (setq args (append args (list "-N"))))

              (when domain (setq args (append args (list "-W" domain))))
              (when port   (setq args (append args (list "-p" port))))
              (when tramp-smb-conf
                (setq args (append args (list "-s" tramp-smb-conf))))
              (setq args
                    (if t1
                        ;; Source is remote.
                        (append args
                                (list "-D" (tramp-unquote-shell-quote-argument
                                            localname)
                                      "-c" (shell-quote-argument "tar qc - *")
                                      "|" "tar" "xfC" "-"
                                      (tramp-unquote-shell-quote-argument
                                       tmpdir)))
                      ;; Target is remote.
                      (append (list "tar" "cfC" "-"
                                    (tramp-unquote-shell-quote-argument dirname)
                                    "." "|")
                              args
                              (list "-D" (tramp-unquote-shell-quote-argument
                                          localname)
                                    "-c" (shell-quote-argument "tar qx -")))))

              (unwind-protect
                  (with-temp-buffer
                    ;; Set the transfer process properties.
                    (tramp-set-connection-property
                     v "process-name" (buffer-name (current-buffer)))
                    (tramp-set-connection-property
                     v "process-buffer" (current-buffer))

                    (when t1
                      ;; The smbclient tar command creates always
                      ;; complete paths.  We must emulate the
                      ;; directory structure, and symlink to the real
                      ;; target.
                      (make-directory
                       (expand-file-name
                        ".." (concat tmpdir localname))
                       'parents)
                      (make-symbolic-link
                       newname (directory-file-name (concat tmpdir localname))))

                    ;; Use an asynchronous processes.  By this,
                    ;; password can be handled.
                    (let* ((default-directory tmpdir)
                           (p (apply
                               'start-process
                               (tramp-get-connection-name v)
                               (tramp-get-connection-buffer v)
                               tramp-smb-program args)))

                      (tramp-message
                       v 6 "%s" (mapconcat 'identity (process-command p) " "))
                      (process-put p 'vector v)
                      (process-put p 'adjust-window-size-function 'ignore)
                      (set-process-query-on-exit-flag p nil)
                      (tramp-process-actions p v nil tramp-smb-actions-with-tar)

                      (while (process-live-p p)
                        (sit-for 0.1))
                      (tramp-message v 6 "\n%s" (buffer-string))))

                ;; Reset the transfer process properties.
                (tramp-flush-connection-property v "process-name")
                (tramp-flush-connection-property v "process-buffer")
                (when t1 (delete-directory tmpdir 'recursive))))

            ;; Handle KEEP-DATE argument.
            (when keep-date
              (set-file-times
               newname
               (tramp-compat-file-attribute-modification-time
                (file-attributes dirname))))

            ;; Set the mode.
            (unless keep-date
              (set-file-modes newname (tramp-default-file-modes dirname)))

            ;; When newname did exist, we have wrong cached values.
            (when t2
              (with-parsed-tramp-file-name newname nil
                (tramp-flush-file-properties v (file-name-directory localname))
                (tramp-flush-file-properties v localname))))

           ;; We must do it file-wise.
           (t
            (tramp-run-real-handler
             'copy-directory (list dirname newname keep-date parents)))))))))

(defun tramp-smb-handle-copy-file
  (filename newname &optional ok-if-already-exists keep-date
   _preserve-uid-gid _preserve-extended-attributes)
  "Like `copy-file' for Tramp files.
KEEP-DATE has no effect in case NEWNAME resides on an SMB server.
PRESERVE-UID-GID and PRESERVE-EXTENDED-ATTRIBUTES are completely ignored."
  (setq filename (expand-file-name filename)
        newname (expand-file-name newname))
  (with-tramp-progress-reporter
      (tramp-dissect-file-name
       (if (tramp-tramp-file-p filename) filename newname))
      0 (format "Copying %s to %s" filename newname)

    (if (file-directory-p filename)
        (copy-directory filename newname keep-date 'parents 'copy-contents)

      (let ((tmpfile (file-local-copy filename)))
        (if tmpfile
            ;; Remote filename.
            (condition-case err
                (rename-file tmpfile newname ok-if-already-exists)
              ((error quit)
               (delete-file tmpfile)
               (signal (car err) (cdr err))))

          ;; Remote newname.
          (when (and (file-directory-p newname)
                     (tramp-compat-directory-name-p newname))
            (setq newname
                  (expand-file-name (file-name-nondirectory filename) newname)))

          (with-parsed-tramp-file-name newname nil
            (when (and (not ok-if-already-exists)
                       (file-exists-p newname))
              (tramp-error v 'file-already-exists newname))

            ;; We must also flush the cache of the directory, because
            ;; `file-attributes' reads the values from there.
            (tramp-flush-file-properties v (file-name-directory localname))
            (tramp-flush-file-properties v localname)
            (unless (tramp-smb-get-share v)
              (tramp-error
               v 'file-error "Target `%s' must contain a share name" newname))
            (unless (tramp-smb-send-command
                     v (format "put \"%s\" \"%s\""
                               (tramp-compat-file-name-unquote filename)
                               (tramp-smb-get-localname v)))
              (tramp-error
               v 'file-error "Cannot copy `%s' to `%s'" filename newname))))))

    ;; KEEP-DATE handling.
    (when keep-date
      (set-file-times
       newname
       (tramp-compat-file-attribute-modification-time
        (file-attributes filename))))))

(defun tramp-smb-handle-delete-directory (directory &optional recursive _trash)
  "Like `delete-directory' for Tramp files."
  (setq directory (directory-file-name (expand-file-name directory)))
  (when (file-exists-p directory)
    (when recursive
      (mapc
       (lambda (file)
         (if (file-directory-p file)
             (delete-directory file recursive)
           (delete-file file)))
       ;; We do not want to delete "." and "..".
       (directory-files directory 'full directory-files-no-dot-files-regexp)))

    (with-parsed-tramp-file-name directory nil
      ;; We must also flush the cache of the directory, because
      ;; `file-attributes' reads the values from there.
      (tramp-flush-file-properties v (file-name-directory localname))
      (tramp-flush-directory-properties v localname)
      (unless (tramp-smb-send-command
               v (format
                  "%s \"%s\""
                  (if (tramp-smb-get-cifs-capabilities v) "posix_rmdir" "rmdir")
                  (tramp-smb-get-localname v)))
        ;; Error.
        (with-current-buffer (tramp-get-connection-buffer v)
          (goto-char (point-min))
          (search-forward-regexp tramp-smb-errors nil t)
          (tramp-error
           v 'file-error "%s `%s'" (match-string 0) directory)))

      ;; "rmdir" does not report an error.  So we check ourselves.
      (when (file-exists-p directory)
        (tramp-error
         v 'file-error "`%s' not removed." directory)))))

(defun tramp-smb-handle-delete-file (filename &optional _trash)
  "Like `delete-file' for Tramp files."
  (setq filename (expand-file-name filename))
  (when (file-exists-p filename)
    (with-parsed-tramp-file-name filename nil
      ;; We must also flush the cache of the directory, because
      ;; `file-attributes' reads the values from there.
      (tramp-flush-file-properties v (file-name-directory localname))
      (tramp-flush-file-properties v localname)
      (unless (tramp-smb-send-command
               v (format
                  "%s \"%s\""
                  (if (tramp-smb-get-cifs-capabilities v) "posix_unlink" "rm")
                  (tramp-smb-get-localname v)))
        ;; Error.
        (with-current-buffer (tramp-get-connection-buffer v)
          (goto-char (point-min))
          (search-forward-regexp tramp-smb-errors nil t)
          (tramp-error
           v 'file-error "%s `%s'" (match-string 0) filename))))))

(defun tramp-smb-handle-directory-files
  (directory &optional full match nosort)
  "Like `directory-files' for Tramp files."
  (let ((result (mapcar 'directory-file-name
                        (file-name-all-completions "" directory))))
    ;; Discriminate with regexp.
    (when match
      (setq result
            (delete nil
                    (mapcar (lambda (x) (when (string-match match x) x))
                            result))))
    ;; Append directory.
    (when full
      (setq result
            (mapcar
             (lambda (x) (format "%s/%s" directory x))
             result)))
    ;; Sort them if necessary.
    (unless nosort (setq result (sort result 'string-lessp)))
    result))

(defun tramp-smb-handle-expand-file-name (name &optional dir)
  "Like `expand-file-name' for Tramp files."
  ;; If DIR is not given, use DEFAULT-DIRECTORY or "/".
  (setq dir (or dir default-directory "/"))
  ;; Unless NAME is absolute, concat DIR and NAME.
  (unless (file-name-absolute-p name)
    (setq name (concat (file-name-as-directory dir) name)))
  ;; If NAME is not a Tramp file, run the real handler.
  (if (not (tramp-tramp-file-p name))
      (tramp-run-real-handler 'expand-file-name (list name nil))
    ;; Dissect NAME.
    (with-parsed-tramp-file-name name nil
      ;; Tilde expansion if necessary.  We use the user name as share,
      ;; which is often the case in domains.
      (when (string-match "\\`/?~\\([^/]*\\)" localname)
        (setq localname
              (replace-match
               (if (zerop (length (match-string 1 localname)))
                   user
                 (match-string 1 localname))
               nil nil localname)))
      ;; Make the file name absolute.
      (unless (tramp-run-real-handler 'file-name-absolute-p (list localname))
        (setq localname (concat "/" localname)))
      ;; No tilde characters in file name, do normal
      ;; `expand-file-name' (this does "/./" and "/../").
      (tramp-make-tramp-file-name
       method user domain host port
       (tramp-run-real-handler 'expand-file-name (list localname))))))

(defun tramp-smb-action-get-acl (proc vec)
  "Read ACL data from connection buffer."
  (unless (process-live-p proc)
    ;; Accept pending output.
    (while (tramp-accept-process-output proc 0.1))
    (with-current-buffer (tramp-get-connection-buffer vec)
      ;; There might be a hidden password prompt.
      (widen)
      (tramp-message vec 10 "\n%s" (buffer-string))
      (goto-char (point-min))
      (while (and (not (eobp)) (not (looking-at "^REVISION:")))
        (forward-line)
        (delete-region (point-min) (point)))
      (while (and (not (eobp)) (looking-at "^.+:.+"))
        (forward-line))
      (delete-region (point) (point-max))
      (throw 'tramp-action 'ok))))

(defun tramp-smb-handle-file-acl (filename)
  "Like `file-acl' for Tramp files."
  (ignore-errors
    (with-parsed-tramp-file-name filename nil
      (with-tramp-file-property v localname "file-acl"
        (when (executable-find tramp-smb-acl-program)
          (let* ((share     (tramp-smb-get-share v))
                 (localname (replace-regexp-in-string
                             "\\\\" "/" (tramp-smb-get-localname v)))
                 (args      (list (concat "//" host "/" share) "-E"))
                 ;; We do not want to run timers.
                 timer-list timer-idle-list)

            (if (not (zerop (length user)))
                (setq args (append args (list "-U" user)))
              (setq args (append args (list "-N"))))

            (when domain (setq args (append args (list "-W" domain))))
            (when port   (setq args (append args (list "-p" port))))
            (when tramp-smb-conf
              (setq args (append args (list "-s" tramp-smb-conf))))
            (setq
             args
             (append args (list (tramp-unquote-shell-quote-argument localname)
                                "2>/dev/null")))

            (unwind-protect
                (with-temp-buffer
                  ;; Set the transfer process properties.
                  (tramp-set-connection-property
                   v "process-name" (buffer-name (current-buffer)))
                  (tramp-set-connection-property
                   v "process-buffer" (current-buffer))

                  ;; Use an asynchronous process.  By this, password can
                  ;; be handled.
                  (let ((p (apply
                            'start-process
                            (tramp-get-connection-name v)
                            (tramp-get-connection-buffer v)
                            tramp-smb-acl-program args)))

                    (tramp-message
                     v 6 "%s" (mapconcat 'identity (process-command p) " "))
                    (process-put p 'vector v)
                    (process-put p 'adjust-window-size-function 'ignore)
                    (set-process-query-on-exit-flag p nil)
                    (tramp-process-actions p v nil tramp-smb-actions-get-acl)
                    (when (> (point-max) (point-min))
                      (substring-no-properties (buffer-string)))))

              ;; Reset the transfer process properties.
              (tramp-flush-connection-property v "process-name")
              (tramp-flush-connection-property v "process-buffer"))))))))

(defun tramp-smb-handle-file-attributes (filename &optional id-format)
  "Like `file-attributes' for Tramp files."
  (unless id-format (setq id-format 'integer))
  (ignore-errors
    (with-parsed-tramp-file-name filename nil
      (with-tramp-file-property
          v localname (format "file-attributes-%s" id-format)
        (if (tramp-smb-get-stat-capability v)
            (tramp-smb-do-file-attributes-with-stat v id-format)
          ;; Reading just the filename entry via "dir localname" is not
          ;; possible, because when filename is a directory, some
          ;; smbclient versions return the content of the directory, and
          ;; other versions don't.  Therefore, the whole content of the
          ;; upper directory is retrieved, and the entry of the filename
          ;; is extracted from.
          (let* ((entries (tramp-smb-get-file-entries
                           (file-name-directory filename)))
                 (entry (assoc (file-name-nondirectory filename) entries))
                 (uid (if (equal id-format 'string) "nobody" -1))
                 (gid (if (equal id-format 'string) "nogroup" -1))
                 (inode (tramp-get-inode v))
                 (device (tramp-get-device v)))

            ;; Check result.
            (when entry
              (list (and (string-match "d" (nth 1 entry))
                         t)        ;0 file type
                    -1             ;1 link count
                    uid            ;2 uid
                    gid            ;3 gid
                    '(0 0)         ;4 atime
                    (nth 3 entry)  ;5 mtime
                    '(0 0)         ;6 ctime
                    (nth 2 entry)  ;7 size
                    (nth 1 entry)  ;8 mode
                    nil            ;9 gid weird
                    inode          ;10 inode number
                    device)))))))) ;11 file system number

(defun tramp-smb-do-file-attributes-with-stat (vec &optional id-format)
  "Implement `file-attributes' for Tramp files using stat command."
  (tramp-message
   vec 5 "file attributes with stat: %s" (tramp-file-name-localname vec))
  (with-current-buffer (tramp-get-connection-buffer vec)
    (let* (size id link uid gid atime mtime ctime mode inode)
      (when (tramp-smb-send-command
             vec (format "stat \"%s\"" (tramp-smb-get-localname vec)))

        ;; Loop the listing.
        (goto-char (point-min))
        (unless (re-search-forward tramp-smb-errors nil t)
          (while (not (eobp))
            (cond
             ((looking-at
               "Size:\\s-+\\([0-9]+\\)\\s-+Blocks:\\s-+[0-9]+\\s-+\\(\\w+\\)")
              (setq size (string-to-number (match-string 1))
                    id (if (string-equal "directory" (match-string 2)) t
                         (if (string-equal "symbolic" (match-string 2)) ""))))
             ((looking-at
               "Inode:\\s-+\\([0-9]+\\)\\s-+Links:\\s-+\\([0-9]+\\)")
              (setq inode (string-to-number (match-string 1))
                    link (string-to-number (match-string 2))))
             ((looking-at
               "Access:\\s-+([0-9]+/\\(\\S-+\\))\\s-+Uid:\\s-+\\([0-9]+\\)\\s-+Gid:\\s-+\\([0-9]+\\)")
              (setq mode (match-string 1)
                    uid (if (equal id-format 'string) (match-string 2)
                          (string-to-number (match-string 2)))
                    gid (if (equal id-format 'string) (match-string 3)
                          (string-to-number (match-string 3)))))
             ((looking-at
               "Access:\\s-+\\([0-9]+\\)-\\([0-9]+\\)-\\([0-9]+\\)\\s-+\\([0-9]+\\):\\([0-9]+\\):\\([0-9]+\\)")
              (setq atime
                    (encode-time
                     (string-to-number (match-string 6)) ;; sec
                     (string-to-number (match-string 5)) ;; min
                     (string-to-number (match-string 4)) ;; hour
                     (string-to-number (match-string 3)) ;; day
                     (string-to-number (match-string 2)) ;; month
                     (string-to-number (match-string 1))))) ;; year
             ((looking-at
               "Modify:\\s-+\\([0-9]+\\)-\\([0-9]+\\)-\\([0-9]+\\)\\s-+\\([0-9]+\\):\\([0-9]+\\):\\([0-9]+\\)")
              (setq mtime
                    (encode-time
                     (string-to-number (match-string 6)) ;; sec
                     (string-to-number (match-string 5)) ;; min
                     (string-to-number (match-string 4)) ;; hour
                     (string-to-number (match-string 3)) ;; day
                     (string-to-number (match-string 2)) ;; month
                     (string-to-number (match-string 1))))) ;; year
             ((looking-at
               "Change:\\s-+\\([0-9]+\\)-\\([0-9]+\\)-\\([0-9]+\\)\\s-+\\([0-9]+\\):\\([0-9]+\\):\\([0-9]+\\)")
              (setq ctime
                    (encode-time
                     (string-to-number (match-string 6)) ;; sec
                     (string-to-number (match-string 5)) ;; min
                     (string-to-number (match-string 4)) ;; hour
                     (string-to-number (match-string 3)) ;; day
                     (string-to-number (match-string 2)) ;; month
                     (string-to-number (match-string 1)))))) ;; year
            (forward-line))

          ;; Resolve symlink.
          (when (and (stringp id)
                     (tramp-smb-send-command
                      vec
                      (format "readlink \"%s\"" (tramp-smb-get-localname vec))))
            (goto-char (point-min))
            (and (looking-at ".+ -> \\(.+\\)")
                 (setq id (match-string 1))))

          ;; Return the result.
          (when (or id link uid gid atime mtime ctime size mode inode)
            (list id link uid gid atime mtime ctime size mode nil inode
                  (tramp-get-device vec))))))))

(defun tramp-smb-handle-file-local-copy (filename)
  "Like `file-local-copy' for Tramp files."
  (with-parsed-tramp-file-name (file-truename filename) nil
    (unless (file-exists-p (file-truename filename))
      (tramp-error
       v tramp-file-missing
       "Cannot make local copy of non-existing file `%s'" filename))
    (let ((tmpfile (tramp-compat-make-temp-file filename)))
      (with-tramp-progress-reporter
          v 3 (format "Fetching %s to tmp file %s" filename tmpfile)
        (unless (tramp-smb-send-command
                 v (format "get \"%s\" \"%s\""
                           (tramp-smb-get-localname v) tmpfile))
          ;; Oops, an error.  We shall cleanup.
          (delete-file tmpfile)
          (tramp-error
           v 'file-error "Cannot make local copy of file `%s'" filename)))
      tmpfile)))

;; This function should return "foo/" for directories and "bar" for
;; files.
(defun tramp-smb-handle-file-name-all-completions (filename directory)
  "Like `file-name-all-completions' for Tramp files."
  (all-completions
   filename
   (with-parsed-tramp-file-name (expand-file-name directory) nil
     (with-tramp-file-property v localname "file-name-all-completions"
       (save-match-data
         (delete-dups
          (mapcar
           (lambda (x)
             (list
              (if (string-match "d" (nth 1 x))
                  (file-name-as-directory (nth 0 x))
                (nth 0 x))))
           (tramp-smb-get-file-entries directory))))))))

(defun tramp-smb-handle-file-system-info (filename)
  "Like `file-system-info' for Tramp files."
  (ignore-errors
    (unless (file-directory-p filename)
      (setq filename (file-name-directory filename)))
    (with-parsed-tramp-file-name (expand-file-name filename) nil
      (tramp-message v 5 "file system info: %s" localname)
      (tramp-smb-send-command v (format "du %s/*" (tramp-smb-get-localname v)))
      (with-current-buffer (tramp-get-connection-buffer v)
        (let (total avail blocksize)
          (goto-char (point-min))
          (forward-line)
          (when (looking-at
                 (concat "[[:space:]]*\\([[:digit:]]+\\)"
                         " blocks of size \\([[:digit:]]+\\)"
                         "\\. \\([[:digit:]]+\\) blocks available"))
            (setq blocksize (string-to-number (concat (match-string 2) "e0"))
                  total (* blocksize
                           (string-to-number (concat (match-string 1) "e0")))
                  avail (* blocksize
                           (string-to-number (concat (match-string 3) "e0")))))
          (forward-line)
          (when (looking-at "Total number of bytes: \\([[:digit:]]+\\)")
            ;; The used number of bytes is not part of the result.  As
            ;; side effect, we store it as file property.
            (tramp-set-file-property
             v localname "used-bytes"
             (string-to-number (concat (match-string 1) "e0"))))
          ;; Result.
          (when (and total avail)
            (list total (- total avail) avail)))))))

(defun tramp-smb-handle-file-writable-p (filename)
  "Like `file-writable-p' for Tramp files."
  (if (file-exists-p filename)
      (string-match
       "w"
       (or (tramp-compat-file-attribute-modes (file-attributes filename)) ""))
    (let ((dir (file-name-directory filename)))
      (and (file-exists-p dir)
           (file-writable-p dir)))))

(defun tramp-smb-handle-insert-directory
  (filename switches &optional wildcard full-directory-p)
  "Like `insert-directory' for Tramp files."
  (setq filename (expand-file-name filename))
  (unless switches (setq switches ""))
  ;; Mark trailing "/".
  (when (and (zerop (length (file-name-nondirectory filename)))
             (not full-directory-p))
    (setq switches (concat switches "F")))
  (if full-directory-p
      ;; Called from `dired-add-entry'.
      (setq filename (file-name-as-directory filename))
    (setq filename (directory-file-name filename)))
  (with-parsed-tramp-file-name filename nil
    (with-tramp-progress-reporter v 0 (format "Opening directory %s" filename)
      (save-match-data
        (let ((base (file-name-nondirectory filename))
              ;; We should not destroy the cache entry.
              (entries (copy-tree
                        (tramp-smb-get-file-entries
                         (file-name-directory filename))))
              (avail (get-free-disk-space filename))
              ;; `get-free-disk-space' calls `file-system-info', which
              ;; sets file property "used-bytes" as side effect.
              (used
               (format
                "%.0f"
                (/ (tramp-get-file-property v localname "used-bytes" 0) 1024))))

          (when wildcard
            (string-match "\\." base)
            (setq base (replace-match "\\\\." nil nil base))
            (string-match "\\*" base)
            (setq base (replace-match ".*" nil nil base))
            (string-match "\\?" base)
            (setq base (replace-match ".?" nil nil base)))

          ;; Filter entries.
          (setq entries
                (delq
                 nil
                 (if (or wildcard (zerop (length base)))
                     ;; Check for matching entries.
                     (mapcar
                      (lambda (x)
                        (when (string-match
                               (format "^%s" base) (nth 0 x))
                          x))
                      entries)
                   ;; We just need the only and only entry FILENAME.
                   (list (assoc base entries)))))

          ;; Sort entries.
          (setq entries
                (sort
                 entries
                 (lambda (x y)
                   (if (string-match "t" switches)
                       ;; Sort by date.
                       (time-less-p (nth 3 y) (nth 3 x))
                     ;; Sort by name.
                     (string-lessp (nth 0 x) (nth 0 y))))))

          ;; Handle "-F" switch.
          (when (string-match "F" switches)
            (mapc
             (lambda (x)
               (when (not (zerop (length (car x))))
                 (cond
                  ((char-equal ?d (string-to-char (nth 1 x)))
                   (setcar x (concat (car x) "/")))
                  ((char-equal ?x (string-to-char (nth 1 x)))
                   (setcar x (concat (car x) "*"))))))
             entries))

          ;; Insert size information.
          (when full-directory-p
            (insert
             (if avail
                 (format "total used in directory %s available %s\n" used avail)
               (format "total %s\n" used))))

          ;; Print entries.
          (mapc
           (lambda (x)
             (when (not (zerop (length (nth 0 x))))
               (let ((attr
                      (when (tramp-smb-get-stat-capability v)
                        (ignore-errors
                          (file-attributes
                           (expand-file-name
                            (nth 0 x) (file-name-directory filename))
                           'string)))))
                 (when (string-match "l" switches)
                   (insert
                    (format
                     "%10s %3d %-8s %-8s %8s %s "
                     (or (tramp-compat-file-attribute-modes attr) (nth 1 x))
                     (or (tramp-compat-file-attribute-link-number attr) 1)
                     (or (tramp-compat-file-attribute-user-id attr) "nobody")
                     (or (tramp-compat-file-attribute-group-id attr) "nogroup")
                     (or (tramp-compat-file-attribute-size attr) (nth 2 x))
                     (format-time-string
                      (if (time-less-p (time-subtract (current-time) (nth 3 x))
                           tramp-half-a-year)
                          "%b %e %R"
                        "%b %e  %Y")
                      (nth 3 x))))) ; date

                 ;; We mark the file name.  The inserted name could be
                 ;; from somewhere else, so we use the relative file name
                 ;; of `default-directory'.
                 (let ((start (point)))
                   (insert
                    (format
                     "%s"
                     (file-relative-name
                      (expand-file-name
                       (nth 0 x) (file-name-directory filename))
                      (when full-directory-p (file-name-directory filename)))))
                   (put-text-property start (point) 'dired-filename t))

                 ;; Insert symlink.
                 (when (and (string-match "l" switches)
                            (stringp (tramp-compat-file-attribute-type attr)))
                   (insert " -> " (tramp-compat-file-attribute-type attr))))

               (insert "\n")
               (forward-line)
               (beginning-of-line)))
           entries))))))

(defun tramp-smb-handle-make-directory (dir &optional parents)
  "Like `make-directory' for Tramp files."
  (setq dir (directory-file-name (expand-file-name dir)))
  (unless (file-name-absolute-p dir)
    (setq dir (expand-file-name dir default-directory)))
  (with-parsed-tramp-file-name dir nil
    (save-match-data
      (let* ((ldir (file-name-directory dir)))
        ;; Make missing directory parts.
        (when (and parents
                   (tramp-smb-get-share v)
                   (not (file-directory-p ldir)))
          (make-directory ldir parents))
        ;; Just do it.
        (when (file-directory-p ldir)
          (make-directory-internal dir))
        (unless (file-directory-p dir)
          (tramp-error v 'file-error "Couldn't make directory %s" dir))))))

(defun tramp-smb-handle-make-directory-internal (directory)
  "Like `make-directory-internal' for Tramp files."
  (setq directory (directory-file-name (expand-file-name directory)))
  (unless (file-name-absolute-p directory)
    (setq directory (expand-file-name directory default-directory)))
  (with-parsed-tramp-file-name directory nil
    (save-match-data
      (let* ((file (tramp-smb-get-localname v)))
        (when (file-directory-p (file-name-directory directory))
          (tramp-smb-send-command
           v
           (if (tramp-smb-get-cifs-capabilities v)
               (format "posix_mkdir \"%s\" %o" file (default-file-modes))
             (format "mkdir \"%s\"" file)))
          ;; We must also flush the cache of the directory, because
          ;; `file-attributes' reads the values from there.
          (tramp-flush-file-properties v (file-name-directory localname))
          (tramp-flush-file-properties v localname))
        (unless (file-directory-p directory)
          (tramp-error
           v 'file-error "Couldn't make directory %s" directory))))))

(defun tramp-smb-handle-make-symbolic-link
  (target linkname &optional ok-if-already-exists)
  "Like `make-symbolic-link' for Tramp files.
If TARGET is a non-Tramp file, it is used verbatim as the target
of the symlink.  If TARGET is a Tramp file, only the localname
component is used as the target of the symlink."
  (if (not (tramp-tramp-file-p (expand-file-name linkname)))
      (tramp-run-real-handler
       'make-symbolic-link (list target linkname ok-if-already-exists))

    (with-parsed-tramp-file-name linkname nil
      ;; If TARGET is a Tramp name, use just the localname component.
      (when (and (tramp-tramp-file-p target)
                 (tramp-file-name-equal-p v (tramp-dissect-file-name target)))
        (setq target
              (tramp-file-name-localname
               (tramp-dissect-file-name (expand-file-name target)))))

      ;; If TARGET is still remote, quote it.
      (if (tramp-tramp-file-p target)
          (make-symbolic-link
           (let (file-name-handler-alist) (tramp-compat-file-name-quote target))
           linkname ok-if-already-exists)

        ;; Do the 'confirm if exists' thing.
        (when (file-exists-p linkname)
          ;; What to do?
          (if (or (null ok-if-already-exists) ; not allowed to exist
                  (and (numberp ok-if-already-exists)
                       (not (yes-or-no-p
                             (format
                              "File %s already exists; make it a link anyway? "
                              localname)))))
              (tramp-error v 'file-already-exists localname)
            (delete-file linkname)))

        (unless (tramp-smb-get-cifs-capabilities v)
          (tramp-error v 'file-error "make-symbolic-link not supported"))

        ;; We must also flush the cache of the directory, because
        ;; `file-attributes' reads the values from there.
        (tramp-flush-file-properties v (file-name-directory localname))
        (tramp-flush-file-properties v localname)

        (unless
            (tramp-smb-send-command
             v (format "symlink \"%s\" \"%s\""
                       (tramp-compat-file-name-unquote target)
                       (tramp-smb-get-localname v)))
          (tramp-error
           v 'file-error
           "error with make-symbolic-link, see buffer `%s' for details"
           (tramp-get-connection-buffer v)))))))

(defun tramp-smb-handle-process-file
  (program &optional infile destination display &rest args)
  "Like `process-file' for Tramp files."
  ;; The implementation is not complete yet.
  (when (and (numberp destination) (zerop destination))
    (error "Implementation does not handle immediate return"))

  (with-parsed-tramp-file-name default-directory nil
    (let* ((name (file-name-nondirectory program))
           (name1 name)
           (i 0)
           ;; We do not want to run timers.
           timer-list timer-idle-list
           input tmpinput outbuf command ret)

      ;; Determine input.
      (when infile
        (setq infile (expand-file-name infile))
        (if (tramp-equal-remote default-directory infile)
            ;; INFILE is on the same remote host.
            (setq input (with-parsed-tramp-file-name infile nil localname))
          ;; INFILE must be copied to remote host.
          (setq input (tramp-make-tramp-temp-file v)
                tmpinput
                (tramp-make-tramp-file-name method user domain host port input))
          (copy-file infile tmpinput t))
        ;; Transform input into a filename powershell does understand.
        (setq input (format "//%s%s" host input)))

      ;; Determine output.
      (cond
       ;; Just a buffer.
       ((bufferp destination)
        (setq outbuf destination))
       ;; A buffer name.
       ((stringp destination)
        (setq outbuf (get-buffer-create destination)))
       ;; (REAL-DESTINATION ERROR-DESTINATION)
       ((consp destination)
        ;; output.
        (cond
         ((bufferp (car destination))
          (setq outbuf (car destination)))
         ((stringp (car destination))
          (setq outbuf (get-buffer-create (car destination))))
         ((car destination)
          (setq outbuf (current-buffer))))
        ;; stderr.
        (tramp-message v 2 "%s" "STDERR not supported"))
       ;; 't
       (destination
        (setq outbuf (current-buffer))))

      ;; Construct command.
      (setq command (mapconcat 'identity (cons program args) " ")
            command (if input
                        (format
                         "get-content %s | & %s"
                         (tramp-smb-shell-quote-argument input) command)
                      (format "& %s" command)))

      (while (get-process name1)
        ;; NAME must be unique as process name.
        (setq i (1+ i)
              name1 (format "%s<%d>" name i)))

      ;; Set the new process properties.
      (tramp-set-connection-property v "process-name" name1)
      (tramp-set-connection-property
       v "process-buffer"
       (or outbuf (generate-new-buffer tramp-temp-buffer-name)))

      ;; Call it.
      (condition-case nil
          (with-current-buffer (tramp-get-connection-buffer v)
            ;; Preserve buffer contents.
            (narrow-to-region (point-max) (point-max))
            (tramp-smb-call-winexe v)
            (when (tramp-smb-get-share v)
              (tramp-smb-send-command
               v (format "cd \"//%s%s\"" host (file-name-directory localname))))
            (tramp-smb-send-command v command)
            ;; Preserve command output.
            (narrow-to-region (point-max) (point-max))
            (let ((p (tramp-get-connection-process v)))
              (tramp-smb-send-command v "exit $lasterrorcode")
              (while (process-live-p p)
                (sleep-for 0.1)
                (setq ret (process-exit-status p))))
            (delete-region (point-min) (point-max))
            (widen))

        ;; When the user did interrupt, we should do it also.  We use
        ;; return code -1 as marker.
        (quit
         (setq ret -1))
        ;; Handle errors.
        (error
         (setq ret 1)))

      ;; We should redisplay the output.
      (when (and display outbuf (get-buffer-window outbuf t)) (redisplay))

      ;; Cleanup.  We remove all file cache values for the connection,
      ;; because the remote process could have changed them.
      (tramp-flush-connection-property v "process-name")
      (tramp-flush-connection-property v "process-buffer")
      (when tmpinput (delete-file tmpinput))
      (unless outbuf
        (kill-buffer (tramp-get-connection-property v "process-buffer" nil)))

      (unless process-file-side-effects
        (tramp-flush-directory-properties v ""))

      ;; Return exit status.
      (if (equal ret -1)
          (keyboard-quit)
        ret))))

(defun tramp-smb-handle-rename-file
  (filename newname &optional ok-if-already-exists)
  "Like `rename-file' for Tramp files."
  (setq filename (expand-file-name filename)
        newname (expand-file-name newname))

  (when (and (not ok-if-already-exists)
             (file-exists-p newname))
    (tramp-error
     (tramp-dissect-file-name
      (if (tramp-tramp-file-p filename) filename newname))
     'file-already-exists newname))

  (with-tramp-progress-reporter
      (tramp-dissect-file-name
       (if (tramp-tramp-file-p filename) filename newname))
      0 (format "Renaming %s to %s" filename newname)

    (if (and (not (file-exists-p newname))
             (tramp-equal-remote filename newname)
             (string-equal
              (tramp-smb-get-share (tramp-dissect-file-name filename))
              (tramp-smb-get-share (tramp-dissect-file-name newname))))
        ;; We can rename directly.
        (with-parsed-tramp-file-name filename v1
          (with-parsed-tramp-file-name newname v2

            ;; We must also flush the cache of the directory, because
            ;; `file-attributes' reads the values from there.
            (tramp-flush-file-properties v1 (file-name-directory v1-localname))
            (tramp-flush-file-properties v1 v1-localname)
            (tramp-flush-file-properties v2 (file-name-directory v2-localname))
            (tramp-flush-file-properties v2 v2-localname)
            (unless (tramp-smb-get-share v2)
              (tramp-error
               v2 'file-error "Target `%s' must contain a share name" newname))
            (unless (tramp-smb-send-command
                     v2 (format "rename \"%s\" \"%s\""
                                (tramp-smb-get-localname v1)
                                (tramp-smb-get-localname v2)))
              (tramp-error v2 'file-error "Cannot rename `%s'" filename))))

      ;; We must rename via copy.
      (copy-file
       filename newname ok-if-already-exists 'keep-time 'preserve-uid-gid)
      (if (file-directory-p filename)
          (delete-directory filename 'recursive)
        (delete-file filename)))))

(defun tramp-smb-action-set-acl (proc vec)
  "Read ACL data from connection buffer."
  (unless (process-live-p proc)
    ;; Accept pending output.
    (while (tramp-accept-process-output proc 0.1))
    (with-current-buffer (tramp-get-connection-buffer vec)
      (tramp-message vec 10 "\n%s" (buffer-string))
      (throw 'tramp-action 'ok))))

(defun tramp-smb-handle-set-file-acl (filename acl-string)
  "Like `set-file-acl' for Tramp files."
  (ignore-errors
    (with-parsed-tramp-file-name filename nil
      (tramp-flush-file-property v localname "file-acl")

      (when (and (stringp acl-string) (executable-find tramp-smb-acl-program))
        (let* ((share     (tramp-smb-get-share v))
               (localname (replace-regexp-in-string
                           "\\\\" "/" (tramp-smb-get-localname v)))
               (args      (list (concat "//" host "/" share) "-E" "-S"
                                (replace-regexp-in-string
                                 "\n" "," acl-string)))
               ;; We do not want to run timers.
               timer-list timer-idle-list)

          (if (not (zerop (length user)))
              (setq args (append args (list "-U" user)))
            (setq args (append args (list "-N"))))

          (when domain (setq args (append args (list "-W" domain))))
          (when port   (setq args (append args (list "-p" port))))
          (when tramp-smb-conf
            (setq args (append args (list "-s" tramp-smb-conf))))
          (setq
           args
           (append args (list (tramp-unquote-shell-quote-argument localname)
                              "&&" "echo" "tramp_exit_status" "0"
                              "||" "echo" "tramp_exit_status" "1")))

          (unwind-protect
              (with-temp-buffer
                ;; Set the transfer process properties.
                (tramp-set-connection-property
                 v "process-name" (buffer-name (current-buffer)))
                (tramp-set-connection-property
                 v "process-buffer" (current-buffer))

                ;; Use an asynchronous process.  By this, password can
                ;; be handled.
                (let ((p (apply
                          'start-process
                          (tramp-get-connection-name v)
                          (tramp-get-connection-buffer v)
                          tramp-smb-acl-program args)))

                  (tramp-message
                   v 6 "%s" (mapconcat 'identity (process-command p) " "))
                  (process-put p 'vector v)
                  (process-put p 'adjust-window-size-function 'ignore)
                  (set-process-query-on-exit-flag p nil)
                  (tramp-process-actions p v nil tramp-smb-actions-set-acl)
                  (goto-char (point-max))
                  ;; This is meant for traces, and returning from the
                  ;; function.  No error is propagated outside, due to
                  ;; the `ignore-errors' closure.
                  (unless (re-search-backward "tramp_exit_status [0-9]+" nil t)
                    (tramp-error
                     v 'file-error
                     "Couldn't find exit status of `%s'" tramp-smb-acl-program))
                  (skip-chars-forward "^ ")
                  (when (zerop (read (current-buffer)))
                    ;; Success.
                    (tramp-set-file-property v localname "file-acl" acl-string)
                    t)))

            ;; Reset the transfer process properties.
            (tramp-flush-connection-property v "process-name")
            (tramp-flush-connection-property v "process-buffer")))))))

(defun tramp-smb-handle-set-file-modes (filename mode)
  "Like `set-file-modes' for Tramp files."
  (with-parsed-tramp-file-name filename nil
    (when (tramp-smb-get-cifs-capabilities v)
      (tramp-flush-file-properties v localname)
      (unless (tramp-smb-send-command
               v (format "chmod \"%s\" %o" (tramp-smb-get-localname v) mode))
        (tramp-error
         v 'file-error "Error while changing file's mode %s" filename)))))

;; We use BUFFER also as connection buffer during setup. Because of
;; this, its original contents must be saved, and restored once
;; connection has been setup.
(defun tramp-smb-handle-start-file-process (name buffer program &rest args)
  "Like `start-file-process' for Tramp files."
  (with-parsed-tramp-file-name default-directory nil
    (let* ((buffer
            (if buffer
                (get-buffer-create buffer)
              ;; BUFFER can be nil.  We use a temporary buffer.
              (generate-new-buffer tramp-temp-buffer-name)))
           (command (mapconcat 'identity (cons program args) " "))
           (bmp (and (buffer-live-p buffer) (buffer-modified-p buffer)))
           (name1 name)
           (i 0)
           ;; We do not want to run timers.
           timer-list timer-idle-list)
      (unwind-protect
          (save-excursion
            (save-restriction
              (while (get-process name1)
                ;; NAME must be unique as process name.
                (setq i (1+ i)
                      name1 (format "%s<%d>" name i)))
              ;; Set the new process properties.
              (tramp-set-connection-property v "process-name" name1)
              (tramp-set-connection-property v "process-buffer" buffer)
              ;; Activate narrowing in order to save BUFFER contents.
              (with-current-buffer (tramp-get-connection-buffer v)
                (let ((buffer-undo-list t))
                  (narrow-to-region (point-max) (point-max))
                  (tramp-smb-call-winexe v)
                  (when (tramp-smb-get-share v)
                    (tramp-smb-send-command
                     v (format
                        "cd \"//%s%s\""
                        host (file-name-directory localname))))
                  (tramp-message v 6 "(%s); exit" command)
                  (tramp-send-string v command)))
              ;; Return value.
              (tramp-get-connection-process v)))

        ;; Save exit.
        (with-current-buffer (tramp-get-connection-buffer v)
          (if (string-match tramp-temp-buffer-name (buffer-name))
              (progn
                (set-process-buffer (tramp-get-connection-process v) nil)
                (kill-buffer (current-buffer)))
            (set-buffer-modified-p bmp)))
        (tramp-flush-connection-property v "process-name")
        (tramp-flush-connection-property v "process-buffer")))))

(defun tramp-smb-handle-substitute-in-file-name (filename)
  "Like `handle-substitute-in-file-name' for Tramp files.
\"//\" substitutes only in the local filename part.  Catches
errors for shares like \"C$/\", which are common in Microsoft Windows."
  ;; Check, whether the local part is a quoted file name.
  (if (tramp-compat-file-name-quoted-p filename)
      filename
    (with-parsed-tramp-file-name filename nil
      ;; Ignore in LOCALNAME everything before "//".
      (when (and (stringp localname) (string-match ".+?/\\(/\\|~\\)" localname))
        (setq filename
              (concat (file-remote-p filename)
                      (replace-match "\\1" nil nil localname)))))
    (condition-case nil
        (tramp-run-real-handler 'substitute-in-file-name (list filename))
      (error filename))))

(defun tramp-smb-handle-write-region
  (start end filename &optional append visit lockname mustbenew)
  "Like `write-region' for Tramp files."
  (setq filename (expand-file-name filename))
  (with-parsed-tramp-file-name filename nil
    (when (and mustbenew (file-exists-p filename)
               (or (eq mustbenew 'excl)
                   (not
                    (y-or-n-p
                     (format "File %s exists; overwrite anyway? " filename)))))
      (tramp-error v 'file-already-exists filename))

    ;; We must also flush the cache of the directory, because
    ;; `file-attributes' reads the values from there.
    (tramp-flush-file-properties v (file-name-directory localname))
    (tramp-flush-file-properties v localname)
    (let ((curbuf (current-buffer))
          (tmpfile (tramp-compat-make-temp-file filename)))
      (when (and append (file-exists-p filename))
        (copy-file filename tmpfile 'ok))
      ;; We say `no-message' here because we don't want the visited file
      ;; modtime data to be clobbered from the temp file.  We call
      ;; `set-visited-file-modtime' ourselves later on.
      (tramp-run-real-handler
       'write-region (list start end tmpfile append 'no-message lockname))

      (with-tramp-progress-reporter
          v 3 (format "Moving tmp file %s to %s" tmpfile filename)
        (unwind-protect
            (unless (tramp-smb-send-command
                     v (format "put %s \"%s\""
                               tmpfile (tramp-smb-get-localname v)))
              (tramp-error v 'file-error "Cannot write `%s'" filename))
          (delete-file tmpfile)))

      (unless (equal curbuf (current-buffer))
        (tramp-error
         v 'file-error
         "Buffer has changed from `%s' to `%s'" curbuf (current-buffer)))

      ;; Set file modification time.
      (when (or (eq visit t) (stringp visit))
        (set-visited-file-modtime
         (tramp-compat-file-attribute-modification-time
          (file-attributes filename))))

      ;; The end.
      (when (and (null noninteractive)
                 (or (eq visit t) (null visit) (stringp visit)))
        (tramp-message v 0 "Wrote %s" filename))
      (run-hooks 'tramp-handle-write-region-hook))))

;; Internal file name functions.

(defun tramp-smb-get-share (vec)
  "Returns the share name of LOCALNAME."
  (save-match-data
    (let ((localname (tramp-file-name-unquote-localname vec)))
      (when (string-match "^/?\\([^/]+\\)/" localname)
        (match-string 1 localname)))))

(defun tramp-smb-get-localname (vec)
  "Returns the file name of LOCALNAME.
If VEC has no cifs capabilities, exchange \"/\" by \"\\\\\"."
  (save-match-data
    (let ((localname (tramp-file-name-unquote-localname vec)))
      (setq
       localname
       (if (string-match "^/?[^/]+\\(/.*\\)" localname)
           ;; There is a share, separated by "/".
           (if (not (tramp-smb-get-cifs-capabilities vec))
               (mapconcat
                (lambda (x) (if (equal x ?/) "\\" (char-to-string x)))
                (match-string 1 localname) "")
             (match-string 1 localname))
         ;; There is just a share.
         (if (string-match "^/?\\([^/]+\\)$" localname)
             (match-string 1 localname)
           "")))

      ;; Sometimes we have discarded `substitute-in-file-name'.
      (when (string-match "\\(\\$\\$\\)\\(/\\|$\\)" localname)
        (setq localname (replace-match "$" nil nil localname 1)))

      ;; A period followed by a space, or trailing periods and spaces,
      ;; are not supported.
      (when (string-match "\\. \\|\\.$\\| $" localname)
        (tramp-error
         vec 'file-error
         "Invalid file name %s" (tramp-make-tramp-file-name vec localname)))

      localname)))

;; Share names of a host are cached. It is very unlikely that the
;; shares do change during connection.
(defun tramp-smb-get-file-entries (directory)
  "Read entries which match DIRECTORY.
Either the shares are listed, or the `dir' command is executed.
Result is a list of (LOCALNAME MODE SIZE MONTH DAY TIME YEAR)."
  ;; If CIFS capabilities are enabled, symlinks are not listed
  ;; by `dir'.  This is a consequence of
  ;; <https://www.samba.org/samba/news/symlink_attack.html>.  See also
  ;; <https://bugzilla.samba.org/show_bug.cgi?id=5116>.
  (with-parsed-tramp-file-name (file-name-as-directory directory) nil
    (setq localname (or localname "/"))
    (with-tramp-file-property v localname "file-entries"
      (with-current-buffer (tramp-get-connection-buffer v)
        (let* ((share (tramp-smb-get-share v))
               (cache (tramp-get-connection-property v "share-cache" nil))
               res entry)

          (if (and (not share) cache)
              ;; Return cached shares.
              (setq res cache)

            ;; Read entries.
            (if share
                (tramp-smb-send-command
                 v (format "dir \"%s*\"" (tramp-smb-get-localname v)))
              ;; `tramp-smb-maybe-open-connection' lists also the share names.
              (tramp-smb-maybe-open-connection v))

            ;; Loop the listing.
            (goto-char (point-min))
            (if (re-search-forward tramp-smb-errors nil t)
                (tramp-error v 'file-error "%s `%s'" (match-string 0) directory)
              (while (not (eobp))
                (setq entry (tramp-smb-read-file-entry share))
                (forward-line)
                (when entry (push entry res))))

            ;; Cache share entries.
            (unless share
              (tramp-set-connection-property v "share-cache" res)))

          ;; Add directory itself.
          (push '("" "drwxrwxrwx" 0 (0 0)) res)

          ;; Return entries.
          (delq nil res))))))

;; Return either a share name (if SHARE is nil), or a file name.
;;
;; If shares are listed, the following format is expected:
;;
;; Disk|                                  - leading spaces
;; [^|]+|                                 - share name, 14 char
;; .*                                     - comment
;;
;; Entries provided by smbclient DIR aren't fully regular.
;; They should have the format
;;
;; \s-\{2,2}                              - leading spaces
;; \S-\(.*\S-\)\s-*                       - file name, 30 chars, left bound
;; \s-+[ADHRSV]*                          - permissions, 7 chars, right bound
;; \s-                                    - space delimiter
;; \s-+[0-9]+                             - size, 8 chars, right bound
;; \s-\{2,2\}                             - space delimiter
;; \w\{3,3\}                              - weekday
;; \s-                                    - space delimiter
;; \w\{3,3\}                              - month
;; \s-                                    - space delimiter
;; [ 12][0-9]                             - day
;; \s-                                    - space delimiter
;; [0-9]\{2,2\}:[0-9]\{2,2\}:[0-9]\{2,2\} - time
;; \s-                                    - space delimiter
;; [0-9]\{4,4\}                           - year
;;
;; samba/src/client.c (http://samba.org/doxygen/samba/client_8c-source.html)
;; has function display_finfo:
;;
;;   d_printf("  %-30s%7.7s %8.0f  %s",
;;            finfo->name,
;;            attrib_string(finfo->mode),
;;            (double)finfo->size,
;;            asctime(LocalTime(&t)));
;;
;; in Samba 1.9, there's the following code:
;;
;;   DEBUG(0,("  %-30s%7.7s%10d  %s",
;;         CNV_LANG(finfo->name),
;;         attrib_string(finfo->mode),
;;         finfo->size,
;;         asctime(LocalTime(&t))));
;;
;; Problems:
;; * Modern regexp constructs, like spy groups and counted repetitions, aren't
;;   available in older Emacsen.
;; * The length of constructs (file name, size) might exceed the default.
;; * File names might contain spaces.
;; * Permissions might be empty.
;;
;; So we try to analyze backwards.
(defun tramp-smb-read-file-entry (share)
  "Parse entry in SMB output buffer.
If SHARE is result, entries are of type dir. Otherwise, shares are listed.
Result is the list (LOCALNAME MODE SIZE MTIME)."
;; We are called from `tramp-smb-get-file-entries', which sets the
;; current buffer.
  (let ((line (buffer-substring (point) (point-at-eol)))
        localname mode size month day hour min sec year mtime)

    (if (not share)

        ;; Read share entries.
        (when (string-match "^Disk|\\([^|]+\\)|" line)
          (setq localname (match-string 1 line)
                mode "dr-xr-xr-x"
                size 0))

      ;; Real listing.
      (cl-block nil

        ;; year.
        (if (string-match "\\([0-9]+\\)$" line)
            (setq year (string-to-number (match-string 1 line))
                  line (substring line 0 -5))
          (cl-return))

        ;; time.
        (if (string-match "\\([0-9]+\\):\\([0-9]+\\):\\([0-9]+\\)$" line)
            (setq hour (string-to-number (match-string 1 line))
                  min  (string-to-number (match-string 2 line))
                  sec  (string-to-number (match-string 3 line))
                  line (substring line 0 -9))
          (cl-return))

        ;; day.
        (if (string-match "\\([0-9]+\\)$" line)
            (setq day  (string-to-number (match-string 1 line))
                  line (substring line 0 -3))
          (cl-return))

        ;; month.
        (if (string-match "\\(\\w+\\)$" line)
            (setq month (match-string 1 line)
                  line  (substring line 0 -4))
          (cl-return))

        ;; weekday.
        (if (string-match "\\(\\w+\\)$" line)
            (setq line (substring line 0 -5))
          (cl-return))

        ;; size.
        (if (string-match "\\([0-9]+\\)$" line)
            (let ((length (- (max 10 (1+ (length (match-string 1 line)))))))
              (setq size (string-to-number (match-string 1 line)))
              (when (string-match
                     "\\([ACDEHNORrsSTV]+\\)" (substring line length))
                (setq length (+ length (match-end 0))))
              (setq line (substring line 0 length)))
          (cl-return))

        ;; mode: ARCHIVE, COMPRESSED, DIRECTORY, ENCRYPTED, HIDDEN,
        ;;       NONINDEXED, NORMAL, OFFLINE, READONLY,
        ;;       REPARSE_POINT, SPARSE, SYSTEM, TEMPORARY, VOLID.

        (if (string-match "\\([ACDEHNORrsSTV]+\\)?$" line)
            (setq
             mode (or (match-string 1 line) "")
             mode (save-match-data (format
                    "%s%s"
                    (if (string-match "D" mode) "d" "-")
                    (mapconcat
                     (lambda (_x) "") "    "
                     (concat "r" (if (string-match "R" mode) "-" "w") "x"))))
             line (substring line 0 -6))
          (cl-return))

        ;; localname.
        (if (string-match "^\\s-+\\(\\S-\\(.*\\S-\\)?\\)\\s-*$" line)
            (setq localname (match-string 1 line))
          (cl-return))))

    (when (and localname mode size)
      (setq mtime
            (if (and sec min hour day month year)
                (encode-time
                 sec min hour day
                 (cdr (assoc (downcase month) parse-time-months))
                 year)
              '(0 0)))
      (list localname mode size mtime))))

(defun tramp-smb-get-cifs-capabilities (vec)
  "Check, whether the SMB server supports POSIX commands."
  ;; When we are not logged in yet, we return nil.
  (if (process-live-p (tramp-get-connection-process vec))
      (with-tramp-connection-property
          (tramp-get-connection-process vec) "cifs-capabilities"
        (save-match-data
          (when (tramp-smb-send-command vec "posix")
            (with-current-buffer (tramp-get-connection-buffer vec)
              (goto-char (point-min))
              (when
                  (re-search-forward "Server supports CIFS capabilities" nil t)
                (member
                 "pathnames"
                 (split-string
                  (buffer-substring (point) (point-at-eol)) nil 'omit)))))))))

(defun tramp-smb-get-stat-capability (vec)
  "Check, whether the SMB server supports the STAT command."
  ;; When we are not logged in yet, we return nil.
  (if (and (tramp-smb-get-share vec)
           (process-live-p (tramp-get-connection-process vec)))
      (with-tramp-connection-property
          (tramp-get-connection-process vec) "stat-capability"
        (tramp-smb-send-command vec "stat \"/\""))))


;; Connection functions.

(defun tramp-smb-send-command (vec command)
  "Send the COMMAND to connection VEC.
Returns nil if there has been an error message from smbclient."
  (tramp-smb-maybe-open-connection vec)
  (tramp-message vec 6 "%s" command)
  (tramp-send-string vec command)
  (tramp-smb-wait-for-output vec))

(defun tramp-smb-maybe-open-connection (vec &optional argument)
  "Maybe open a connection to HOST, log in as USER, using `tramp-smb-program'.
Does not do anything if a connection is already open, but re-opens the
connection if a previous connection has died for some reason.
If ARGUMENT is non-nil, use it as argument for
`tramp-smb-winexe-program', and suppress any checks."
  (let* ((share (tramp-smb-get-share vec))
         (buf (tramp-get-connection-buffer vec))
         (p (get-buffer-process buf)))

    ;; Check whether we still have the same smbclient version.
    ;; Otherwise, we must delete the connection cache, because
    ;; capabilities migh have changed.
    (unless (or argument (processp p))
      (let ((default-directory (tramp-compat-temporary-file-directory))
            (command (concat tramp-smb-program " -V")))

        (unless tramp-smb-version
          (unless (executable-find tramp-smb-program)
            (tramp-error
             vec 'file-error
             "Cannot find command %s in %s" tramp-smb-program exec-path))
          (setq tramp-smb-version (shell-command-to-string command))
          (tramp-message vec 6 command)
          (tramp-message vec 6 "\n%s" tramp-smb-version)
          (if (string-match "[ \t\n\r]+\\'" tramp-smb-version)
              (setq tramp-smb-version
                    (replace-match "" nil nil tramp-smb-version))))

        (unless (string-equal
                 tramp-smb-version
                 (tramp-get-connection-property
                  vec "smbclient-version" tramp-smb-version))
          (tramp-flush-directory-properties vec "")
          (tramp-flush-connection-properties vec))

        (tramp-set-connection-property
         vec "smbclient-version" tramp-smb-version)))

    ;; If too much time has passed since last command was sent, look
    ;; whether there has been an error message; maybe due to
    ;; connection timeout.
    (with-current-buffer buf
      (goto-char (point-min))
      (when (and (> (tramp-time-diff
                     (current-time)
                     (tramp-get-connection-property
                      p "last-cmd-time" '(0 0 0)))
                    60)
                 (process-live-p p)
                 (re-search-forward tramp-smb-errors nil t))
        (delete-process p)
        (setq p nil)))

    ;; Check whether it is still the same share.
    (unless (and (process-live-p p)
                 (or argument
                     (string-equal
                      share
                      (tramp-get-connection-property p "smb-share" ""))))

      (save-match-data
        ;; There might be unread output from checking for share names.
        (when buf (with-current-buffer buf (erase-buffer)))
        (when (and p (processp p)) (delete-process p))

        (let* ((user   (tramp-file-name-user vec))
               (host   (tramp-file-name-host vec))
               (domain (tramp-file-name-domain vec))
               (port   (tramp-file-name-port vec))
               args)

          (cond
           (argument
            (setq args (list (concat "//" host))))
           (share
            (setq args (list (concat "//" host "/" share))))
           (t
            (setq args (list "-g" "-L" host ))))

          (if (not (zerop (length user)))
              (setq args (append args (list "-U" user)))
            (setq args (append args (list "-N"))))

          (when domain (setq args (append args (list "-W" domain))))
          (when port   (setq args (append args (list "-p" port))))
          (when tramp-smb-conf
            (setq args (append args (list "-s" tramp-smb-conf))))
          (when argument
            (setq args (append args (list argument))))

          ;; OK, let's go.
          (with-tramp-progress-reporter
              vec 3
              (format "Opening connection for //%s%s/%s"
                      (if (not (zerop (length user))) (concat user "@") "")
                      host (or share ""))

            (let* ((coding-system-for-read nil)
                   (process-connection-type tramp-process-connection-type)
                   (p (let ((default-directory
                              (tramp-compat-temporary-file-directory)))
                        (apply #'start-process
                               (tramp-get-connection-name vec)
                               (tramp-get-connection-buffer vec)
                               (if argument
                                   tramp-smb-winexe-program tramp-smb-program)
                               args))))

              (tramp-message
               vec 6 "%s" (mapconcat 'identity (process-command p) " "))
              (process-put p 'vector vec)
              (process-put p 'adjust-window-size-function 'ignore)
              (set-process-query-on-exit-flag p nil)

              (condition-case err
                  (let (tramp-message-show-message)
                    ;; Play login scenario.
                    (tramp-process-actions
                     p vec nil
                     (if (or argument share)
                         tramp-smb-actions-with-share
                       tramp-smb-actions-without-share))

                    ;; Check server version.
                    (unless argument
                      (with-current-buffer (tramp-get-connection-buffer vec)
                        (goto-char (point-min))
                        (search-forward-regexp tramp-smb-server-version nil t)
                        (let ((smbserver-version (match-string 0)))
                          (unless
                              (string-equal
                               smbserver-version
                               (tramp-get-connection-property
                                vec "smbserver-version" smbserver-version))
                            (tramp-flush-directory-properties vec "")
                            (tramp-flush-connection-properties vec))
                          (tramp-set-connection-property
                           vec "smbserver-version" smbserver-version))))

                    ;; Set chunksize to 1.  smbclient reads its input
                    ;; character by character; if we send the string
                    ;; at once, it is read painfully slow.
                    (tramp-set-connection-property p "smb-share" share)
                    (tramp-set-connection-property p "chunksize" 1)

                    ;; Set connection-local variables.
                    (tramp-set-connection-local-variables vec)

                    ;; Mark it as connected.
                    (tramp-set-connection-property p "connected" t))

                ;; Check for the error reason.  If it was due to wrong
                ;; password, reestablish the connection.  We cannot
                ;; handle this in `tramp-process-actions', because
                ;; smbclient does not ask for the password, again.
                (error
                 (with-current-buffer (tramp-get-connection-buffer vec)
                   (goto-char (point-min))
                   (if (and (bound-and-true-p auth-sources)
                            (search-forward-regexp
                             tramp-smb-wrong-passwd-regexp nil t))
                       ;; Disable `auth-source' and `password-cache'.
                       (let (auth-sources)
                         (tramp-message
                          vec 3 "Retry connection with new password")
                         (tramp-cleanup-connection vec t)
                         (tramp-smb-maybe-open-connection vec argument))
                     ;; Propagate the error.
                     (signal (car err) (cdr err)))))))))))))

;; We don't use timeouts.  If needed, the caller shall wrap around.
(defun tramp-smb-wait-for-output (vec)
  "Wait for output from smbclient command.
Returns nil if an error message has appeared."
  (with-current-buffer (tramp-get-connection-buffer vec)
    (let ((p (get-buffer-process (current-buffer)))
          (found (progn (goto-char (point-min))
                        (re-search-forward tramp-smb-prompt nil t)))
          (err   (progn (goto-char (point-min))
                        (re-search-forward tramp-smb-errors nil t)))
          buffer-read-only)

      ;; Algorithm: get waiting output.  See if last line contains
      ;; `tramp-smb-prompt' sentinel or `tramp-smb-errors' strings.
      ;; If not, wait a bit and again get waiting output.
      (while (and (not found) (not err) (process-live-p p))

        ;; Accept pending output.
        (tramp-accept-process-output p 0.1)

        ;; Search for prompt.
        (goto-char (point-min))
        (setq found (re-search-forward tramp-smb-prompt nil t))

        ;; Search for errors.
        (goto-char (point-min))
        (setq err (re-search-forward tramp-smb-errors nil t)))

      ;; When the process is still alive, read pending output.
      (while (and (not found) (process-live-p p))

        ;; Accept pending output.
        (tramp-accept-process-output p 0.1)

        ;; Search for prompt.
        (goto-char (point-min))
        (setq found (re-search-forward tramp-smb-prompt nil t)))

      (tramp-message vec 6 "\n%s" (buffer-string))

      ;; Remove prompt.
      (when found
        (goto-char (point-max))
        (re-search-backward tramp-smb-prompt nil t)
        (delete-region (point) (point-max)))

      ;; Return value is whether no error message has appeared.
      (not err))))

(defun tramp-smb-kill-winexe-function ()
  "Send SIGKILL to the winexe process."
  (ignore-errors
    (let ((p (get-buffer-process (current-buffer))))
      (when (process-live-p p)
        (signal-process (process-id p) 'SIGINT)))))

(defun tramp-smb-call-winexe (vec)
  "Apply a remote command, if possible, using `tramp-smb-winexe-program'."

  ;; Check for program.
  (unless (executable-find tramp-smb-winexe-program)
    (tramp-error
     vec 'file-error "Cannot find program: %s" tramp-smb-winexe-program))

  ;; winexe does not supports ports.
  (when (tramp-file-name-port vec)
    (tramp-error vec 'file-error "Port not supported for remote processes"))

  (tramp-smb-maybe-open-connection
   vec
   (format
    "%s %s"
    tramp-smb-winexe-shell-command tramp-smb-winexe-shell-command-switch))

  (set (make-local-variable 'kill-buffer-hook)
       '(tramp-smb-kill-winexe-function))

  ;; Suppress "^M".  Shouldn't we specify utf8?
  (set-process-coding-system (tramp-get-connection-process vec) 'raw-text-dos)

  ;; Set width to 128.  This avoids mixing prompt and long error messages.
  (tramp-smb-send-command vec "$rawui = (Get-Host).UI.RawUI")
  (tramp-smb-send-command vec "$bufsize = $rawui.BufferSize")
  (tramp-smb-send-command vec "$winsize = $rawui.WindowSize")
  (tramp-smb-send-command vec "$bufsize.Width = 128")
  (tramp-smb-send-command vec "$winsize.Width = 128")
  (tramp-smb-send-command vec "$rawui.BufferSize = $bufsize")
  (tramp-smb-send-command vec "$rawui.WindowSize = $winsize"))

(defun tramp-smb-shell-quote-argument (s)
  "Similar to `shell-quote-argument', but uses windows cmd syntax."
  (let ((system-type 'ms-dos))
    (tramp-unquote-shell-quote-argument s)))

(add-hook 'tramp-unload-hook
          (lambda ()
            (unload-feature 'tramp-smb 'force)))

(provide 'tramp-smb)

;;; TODO:

;; * Return more comprehensive file permission string.
;;
;; * Try to remove the inclusion of dummy "" directory.  Seems to be at
;;   several places, especially in `tramp-smb-handle-insert-directory'.
;;
;; * Ignore case in file names.

;;; tramp-smb.el ends here