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;;; tramp-smb.el --- Tramp access functions for SMB servers  -*- lexical-binding:t -*-
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;; Copyright (C) 2002-2017 Free Software Foundation, Inc.
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;; Author: Michael Albinus <michael.albinus@gmx.de>
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;; Keywords: comm, processes
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;; Package: tramp
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;; This file is part of GNU Emacs.

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;; GNU Emacs is free software: you can redistribute it and/or modify
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;; it under the terms of the GNU General Public License as published by
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;; the Free Software Foundation, either version 3 of the License, or
;; (at your option) any later version.
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;; 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
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;; along with GNU Emacs.  If not, see <http://www.gnu.org/licenses/>.
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;;; Commentary:

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

;;; Code:

(require 'tramp)

;; Define SMB method ...
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;;;###tramp-autoload
(defconst tramp-smb-method "smb"
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  "Method to connect SAMBA and M$ SMB servers.")
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;; ... and add it to the method list.
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;;;###tramp-autoload
(unless (memq system-type '(cygwin windows-nt))
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  (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 "")
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      ;; This is just a guess.  We don't know whether the share "C$"
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      ;; is available for public use, and whether the user has write
      ;; access.
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      (tramp-tmpdir "/C$/Temp")
      ;; Another guess.  We might implement a better check later on.
      (tramp-case-insensitive t))))
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;; Add a default for `tramp-default-user-alist'. Rule: For the SMB method,
;; the anonymous user is chosen.
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;;;###tramp-autoload
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(add-to-list 'tramp-default-user-alist
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	     `(,(concat "\\`" tramp-smb-method "\\'") nil nil))
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;; Add completion function for SMB method.
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;;;###tramp-autoload
(eval-after-load 'tramp
  '(tramp-set-completion-function
    tramp-smb-method
    '((tramp-parse-netrc "~/.netrc"))))
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;;;###tramp-autoload
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(defcustom tramp-smb-program "smbclient"
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  "Name of SMB client to run."
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  :group 'tramp
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  :type 'string
  :require 'tramp)
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;;;###tramp-autoload
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(defcustom tramp-smb-acl-program "smbcacls"
  "Name of SMB acls to run."
  :group 'tramp
  :type 'string
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  :version "24.4"
  :require 'tramp)
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;;;###tramp-autoload
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(defcustom tramp-smb-conf "/dev/null"
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  "Path of the smb.conf file.
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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
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  :type '(choice (const nil) (file :must-match t))
  :require 'tramp)
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(defvar tramp-smb-version nil
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  "Version string of the SMB client.")
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(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.")
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(defconst tramp-smb-errors
  (mapconcat
   'identity
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   `(;; Connection error / timeout / unknown command.
     "Connection\\( to \\S-+\\)? failed"
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     "Read from server failed, maybe it closed the connection"
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     "Call timed out: server did not respond"
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     "\\S-+: command not found"
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     "Server doesn't support UNIX CIFS calls"
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     ,(regexp-opt
       '(;; Samba.
	 "ERRDOS"
	 "ERRHRD"
	 "ERRSRV"
	 "ERRbadfile"
	 "ERRbadpw"
	 "ERRfilexists"
	 "ERRnoaccess"
	 "ERRnomem"
	 "ERRnosuchshare"
	 ;; Windows 4.0 (Windows NT), Windows 5.0 (Windows 2000),
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	 ;; Windows 5.1 (Windows XP), Windows 5.2 (Windows Server 2003),
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	 ;; Windows 6.0 (Windows Vista), Windows 6.1 (Windows 7),
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	 ;; Windows 6.3 (Windows Server 2012, Windows 10).
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	 "NT_STATUS_ACCESS_DENIED"
	 "NT_STATUS_ACCOUNT_LOCKED_OUT"
	 "NT_STATUS_BAD_NETWORK_NAME"
	 "NT_STATUS_CANNOT_DELETE"
	 "NT_STATUS_CONNECTION_REFUSED"
	 "NT_STATUS_DIRECTORY_NOT_EMPTY"
	 "NT_STATUS_DUPLICATE_NAME"
	 "NT_STATUS_FILE_IS_A_DIRECTORY"
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	 "NT_STATUS_HOST_UNREACHABLE"
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	 "NT_STATUS_IMAGE_ALREADY_LOADED"
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	 "NT_STATUS_INVALID_LEVEL"
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	 "NT_STATUS_IO_TIMEOUT"
	 "NT_STATUS_LOGON_FAILURE"
	 "NT_STATUS_NETWORK_ACCESS_DENIED"
	 "NT_STATUS_NOT_IMPLEMENTED"
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	 "NT_STATUS_NO_LOGON_SERVERS"
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	 "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"
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	 "NT_STATUS_PASSWORD_MUST_CHANGE"
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	 "NT_STATUS_SHARING_VIOLATION"
	 "NT_STATUS_TRUSTED_RELATIONSHIP_FAILURE"
	 "NT_STATUS_UNSUCCESSFUL"
	 "NT_STATUS_WRONG_PASSWORD")))
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   "\\|")
  "Regexp for possible error strings of SMB servers.
Used instead of analyzing error codes of commands.")

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

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

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

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

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;; Options for remote processes via winexe.
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;;;###tramp-autoload
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(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
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  :version "24.3"
  :require 'tramp)
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;;;###tramp-autoload
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(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
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  :version "24.3"
  :require 'tramp)
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;;;###tramp-autoload
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(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
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  :version "24.3"
  :require 'tramp)
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;; It must be a `defsubst' in order to push the whole code into
;; tramp-loaddefs.el.  Otherwise, there would be recursive autoloading.
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;;;###tramp-autoload
(defsubst tramp-smb-file-name-p (filename)
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  "Check if it's a filename for SMB servers."
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  (string= (tramp-file-name-method (tramp-dissect-file-name filename))
	   tramp-smb-method))
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;;;###tramp-autoload
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(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
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	(save-match-data (apply (cdr fn) args))
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      (tramp-run-real-handler operation args))))

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

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(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))
      (when (and (not ok-if-already-exists)
		 (file-exists-p newname)
		 (not (numberp ok-if-already-exists))
		 (y-or-n-p
		  (format
		   "File %s already exists; make it a new name anyway? "
		   newname)))
	(tramp-error
	 v2 'file-error
	 "add-name-to-file: file %s already exists" newname))
      ;; We must also flush the cache of the directory, because
      ;; `file-attributes' reads the values from there.
      (tramp-flush-file-property v2 (file-name-directory v2-localname))
      (tramp-flush-file-property v2 v2-localname)
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      (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
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	 "error with add-name-to-file, see buffer `%s' for details"
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	 (buffer-name))))))
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(defun tramp-smb-action-with-tar (proc vec)
  "Untar from connection buffer."
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  (if (not (process-live-p proc))
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      (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)))))

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(defun tramp-smb-handle-copy-directory
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  (dirname newname &optional keep-date parents copy-contents)
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  "Like `copy-directory' for Tramp files."
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  (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)
	  (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
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		    (make-directory tmpdir)
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		    (copy-directory dirname tmpdir keep-date 'parents)
		    (copy-directory
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		     (expand-file-name (file-name-nondirectory dirname) tmpdir)
		     newname keep-date parents))
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		(delete-directory tmpdir 'recursive))))
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	   ;; We can copy recursively.
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	   ((and (or t1 t2) (tramp-smb-get-cifs-capabilities v))
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	    (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))

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	    ;; Set variables for computing the prompt for reading password.
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	    (setq tramp-current-method method
		  tramp-current-user user
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		  tramp-current-domain domain
		  tramp-current-host host
		  tramp-current-port port)
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	    (let* ((share (tramp-smb-get-share v))
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		   (localname (file-name-as-directory
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			       (replace-regexp-in-string
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				"\\\\" "/" (tramp-smb-get-localname v))))
		   (tmpdir    (make-temp-name
			       (expand-file-name
				tramp-temp-name-prefix
				(tramp-compat-temporary-file-directory))))
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		   (args      (list (concat "//" host "/" share) "-E")))
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	      (if (not (zerop (length user)))
		  (setq args (append args (list "-U" user)))
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		(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
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				(list "-D" (tramp-unquote-shell-quote-argument
					    localname)
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				      "-c" (shell-quote-argument "tar qc - *")
				      "|" "tar" "xfC" "-"
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				      (tramp-unquote-shell-quote-argument
				       tmpdir)))
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		      ;; Target is remote.
		      (append (list "tar" "cfC" "-"
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				    (tramp-unquote-shell-quote-argument dirname)
				    "." "|")
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			      args
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			      (list "-D" (tramp-unquote-shell-quote-argument
					  localname)
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				    "-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
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			".." (concat tmpdir localname))
		       'parents)
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		      (make-symbolic-link
		       newname (directory-file-name (concat tmpdir localname))))

		    ;; Use an asynchronous processes.  By this,
		    ;; password can be handled.
		    (let* ((default-directory tmpdir)
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			   (p (apply
			       'start-process
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			       (tramp-get-connection-name v)
			       (tramp-get-connection-buffer v)
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			       tramp-smb-program args)))
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		      (tramp-message
		       v 6 "%s" (mapconcat 'identity (process-command p) " "))
		      (tramp-set-connection-property p "vector" v)
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		      (process-put p 'adjust-window-size-function 'ignore)
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		      (set-process-query-on-exit-flag p nil)
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		      (tramp-process-actions p v nil tramp-smb-actions-with-tar)

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

		;; Reset the transfer process properties.
		(tramp-set-connection-property v "process-name" nil)
		(tramp-set-connection-property v "process-buffer" nil)
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		(when t1 (delete-directory tmpdir 'recurse))))
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	    ;; Handle KEEP-DATE argument.
	    (when keep-date
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	      (set-file-times
	       newname
	       (tramp-compat-file-attribute-modification-time
		(file-attributes dirname))))
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	    ;; 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-property v (file-name-directory localname))
		(tramp-flush-file-property v localname))))

	   ;; We must do it file-wise.
	   (t
	    (tramp-run-real-handler
	     'copy-directory (list dirname newname keep-date parents)))))))))
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(defun tramp-smb-handle-copy-file
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  (filename newname &optional ok-if-already-exists keep-date
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   _preserve-uid-gid _preserve-extended-attributes)
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  "Like `copy-file' for Tramp files.
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KEEP-DATE has no effect in case NEWNAME resides on an SMB server.
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PRESERVE-UID-GID and PRESERVE-EXTENDED-ATTRIBUTES are completely ignored."
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  (setq filename (expand-file-name filename)
	newname (expand-file-name newname))
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  (with-tramp-progress-reporter
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      (tramp-dissect-file-name
       (if (tramp-tramp-file-p filename) filename newname))
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      0 (format "Copying %s to %s" filename newname)

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    (if (file-directory-p filename)
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	(copy-directory
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	 filename newname keep-date 'parents 'copy-contents)
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      (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 (file-directory-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-property v (file-name-directory localname))
	    (tramp-flush-file-property v localname)
	    (unless (tramp-smb-get-share v)
	      (tramp-error
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	       v 'file-error "Target `%s' must contain a share name" newname))
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	    (unless (tramp-smb-send-command
		     v (format "put \"%s\" \"%s\""
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			       (tramp-compat-file-name-unquote filename)
			       (tramp-smb-get-localname v)))
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	      (tramp-error
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	       v 'file-error "Cannot copy `%s' to `%s'" filename newname))))))
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    ;; KEEP-DATE handling.
    (when keep-date
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      (set-file-times
       newname
       (tramp-compat-file-attribute-modification-time
	(file-attributes filename))))))
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(defun tramp-smb-handle-delete-directory (directory &optional recursive _trash)
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  "Like `delete-directory' for Tramp files."
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  (setq directory (directory-file-name (expand-file-name directory)))
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  (when (file-exists-p directory)
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    (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)))
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    (with-parsed-tramp-file-name directory nil
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      ;; We must also flush the cache of the directory, because
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      ;; `file-attributes' reads the values from there.
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      (tramp-flush-file-property v (file-name-directory localname))
      (tramp-flush-directory-property v localname)
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      (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
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	   v 'file-error "%s `%s'" (match-string 0) directory))))))
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(defun tramp-smb-handle-delete-file (filename &optional _trash)
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  "Like `delete-file' for Tramp files."
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  (setq filename (expand-file-name filename))
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  (when (file-exists-p filename)
    (with-parsed-tramp-file-name filename nil
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      ;; We must also flush the cache of the directory, because
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      ;; `file-attributes' reads the values from there.
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      (tramp-flush-file-property v (file-name-directory localname))
      (tramp-flush-file-property v localname)
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      (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
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	   v 'file-error "%s `%s'" (match-string 0) filename))))))
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(defun tramp-smb-handle-directory-files
  (directory &optional full match nosort)
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  "Like `directory-files' for Tramp files."
  (let ((result (mapcar 'directory-file-name
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			(file-name-all-completions "" directory))))
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    ;; Discriminate with regexp.
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    (when match
      (setq result
	    (delete nil
		    (mapcar (lambda (x) (when (string-match match x) x))
			    result))))
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    ;; Append directory.
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    (when full
      (setq result
	    (mapcar
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	     (lambda (x) (format "%s/%s" directory x))
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	     result)))
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    ;; Sort them if necessary.
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    (unless nosort (setq result (sort result 'string-lessp)))
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    result))
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(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,
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      ;; which is often the case in domains.
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      (when (string-match "\\`/?~\\([^/]*\\)" localname)
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	(setq localname
	      (replace-match
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	       (if (zerop (length (match-string 1 localname)))
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		   user
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		 (match-string 1 localname))
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	       nil nil localname)))
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      ;; Make the file name absolute.
      (unless (tramp-run-real-handler 'file-name-absolute-p (list localname))
	(setq localname (concat "/" localname)))
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      ;; No tilde characters in file name, do normal
      ;; `expand-file-name' (this does "/./" and "/../").
      (tramp-make-tramp-file-name
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       method user domain host port
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       (tramp-run-real-handler 'expand-file-name (list localname))))))

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(defun tramp-smb-action-get-acl (proc vec)
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  "Read ACL data from connection buffer."
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  (unless (process-live-p proc)
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    ;; 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))))

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(defun tramp-smb-handle-file-acl (filename)
  "Like `file-acl' for Tramp files."
  (with-parsed-tramp-file-name filename nil
    (with-tramp-file-property v localname "file-acl"
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      (when (executable-find tramp-smb-acl-program)
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	;; Set variables for computing the prompt for reading password.
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	(setq tramp-current-method method
	      tramp-current-user user
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	      tramp-current-domain domain
	      tramp-current-host host
	      tramp-current-port port)
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	(let* ((share     (tramp-smb-get-share v))
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	       (localname (replace-regexp-in-string
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			   "\\\\" "/" (tramp-smb-get-localname v)))
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	       (args      (list (concat "//" host "/" share) "-E")))
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	  (if (not (zerop (length user)))
	      (setq args (append args (list "-U" user)))
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	    (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
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	   (append args (list (tramp-unquote-shell-quote-argument localname)
			      "2>/dev/null")))
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	  (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 processes.  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) " "))
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		  (tramp-set-connection-property p "vector" v)
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		  (process-put p 'adjust-window-size-function 'ignore)
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		  (set-process-query-on-exit-flag p nil)
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		  (tramp-process-actions p v nil tramp-smb-actions-get-acl)
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		  (when (> (point-max) (point-min))
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		    (substring-no-properties (buffer-string)))))
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	    ;; Reset the transfer process properties.
	    (tramp-set-connection-property v "process-name" nil)
	    (tramp-set-connection-property v "process-buffer" nil)))))))
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(defun tramp-smb-handle-file-attributes (filename &optional id-format)
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  "Like `file-attributes' for Tramp files."
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  (unless id-format (setq id-format 'integer))
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  (ignore-errors
    (with-parsed-tramp-file-name filename nil
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      (with-tramp-file-property
	  v localname (format "file-attributes-%s" id-format)
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	(if (tramp-smb-get-stat-capability v)
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	    (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
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(defun tramp-smb-do-file-attributes-with-stat (vec &optional id-format)
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  "Implement `file-attributes' for Tramp files using stat command."
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  (tramp-message
   vec 5 "file attributes with stat: %s" (tramp-file-name-localname vec))
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  (with-current-buffer (tramp-get-connection-buffer vec)
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    (let* (size id link uid gid atime mtime ctime mode inode)
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      (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))
	  ;; Return the result.
	  (list id link uid gid atime mtime ctime size mode nil inode
		(tramp-get-device vec)))))))
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(defun tramp-smb-handle-file-directory-p (filename)
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  "Like `file-directory-p' for Tramp files."
  (and (file-exists-p filename)
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       (eq ?d
	   (aref (tramp-compat-file-attribute-modes (file-attributes filename))
		 0))))
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(defun tramp-smb-handle-file-local-copy (filename)
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  "Like `file-local-copy' for Tramp files."
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  (with-parsed-tramp-file-name filename nil
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    (unless (file-exists-p filename)
      (tramp-error
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       v tramp-file-missing
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       "Cannot make local copy of non-existing file `%s'" filename))
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    (let ((tmpfile (tramp-compat-make-temp-file filename)))
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      (with-tramp-progress-reporter
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	  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.
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	  (delete-file tmpfile)
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	  (tramp-error
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	   v 'file-error "Cannot make local copy of file `%s'" filename)))
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      tmpfile)))
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;; This function should return "foo/" for directories and "bar" for
;; files.
(defun tramp-smb-handle-file-name-all-completions (filename directory)
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  "Like `file-name-all-completions' for Tramp files."
  (all-completions
   filename
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   (with-parsed-tramp-file-name (expand-file-name directory) nil
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     (with-tramp-file-property v localname "file-name-all-completions"
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       (save-match-data
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	 (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))))))))
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(defun tramp-smb-handle-file-writable-p (filename)
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  "Like `file-writable-p' for Tramp files."
  (if (file-exists-p filename)
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      (string-match
       "w"
       (or (tramp-compat-file-attribute-modes (file-attributes filename)) ""))
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    (let ((dir (file-name-directory filename)))
      (and (file-exists-p dir)
	   (file-writable-p dir)))))
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(defun tramp-smb-handle-insert-directory
  (filename switches &optional wildcard full-directory-p)
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  "Like `insert-directory' for Tramp files."
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  (setq filename (expand-file-name filename))
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  (unless switches (setq switches ""))
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  ;; Mark trailing "/".
  (when (and (zerop (length (file-name-nondirectory filename)))
	     (not full-directory-p))
    (