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;;; tramp-smb.el --- Tramp access functions for SMB servers
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;; Copyright (C) 2002-2013 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:

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(eval-when-compile (require 'cl))	; block, return
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(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$"
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      ;; is available for public use, and whether the user has write
      ;; access.
      (tramp-tmpdir "/C$/Temp"))))
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;; Add a default for `tramp-default-method-alist'. Rule: If there is
;; a domain in USER, it must be the SMB method.
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;;;###tramp-autoload
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(add-to-list 'tramp-default-method-alist
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	     `(nil ,tramp-prefix-domain-regexp ,tramp-smb-method))
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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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(defcustom tramp-smb-program "smbclient"
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  "Name of SMB client to run."
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  :group 'tramp
  :type 'string)

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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
  :type '(choice (const nil) (file :must-match t)))

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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"
     "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),
	 ;; Windows 6.0 (Windows Vista), Windows 6.1 (Windows 7).
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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_IMAGE_ALREADY_LOADED"
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	 "NT_STATUS_IO_TIMEOUT"
	 "NT_STATUS_LOGON_FAILURE"
	 "NT_STATUS_NETWORK_ACCESS_DENIED"
	 "NT_STATUS_NOT_IMPLEMENTED"
	 "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_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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;; New handlers should be added here.
(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-call-process . ignore)
    (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-executable-p . tramp-handle-file-exists-p)
    (file-exists-p . tramp-handle-file-exists-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-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-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)
    (make-directory . tramp-smb-handle-make-directory)
    (make-directory-internal . tramp-smb-handle-make-directory-internal)
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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 . ignore)
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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 . ignore)
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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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    (unhandled-file-name-directory . tramp-handle-unhandled-file-name-directory)
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    (vc-registered . ignore)
    (verify-visited-file-modtime . ignore)
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    (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.")

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;; Options for remote processes via winexe.
(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")
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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")
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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")
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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))
  (add-to-list 'tramp-foreign-file-name-handler-alist
	       (cons '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
	 "error with add-name-to-file, see buffer `%s' for details"
	 (buffer-name))))))
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(defun tramp-smb-action-with-tar (proc vec)
  "Untar from connection buffer."
  (if (not (memq (process-status proc) '(run open)))
      (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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  (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
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      (with-tramp-progress-reporter
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	  v 0 (format "Copying %s to %s" dirname newname)
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      (cond
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       ;; We must use a local temporary directory.
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       ((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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		(tramp-compat-copy-directory dirname tmpdir keep-date parents)
		(tramp-compat-copy-directory tmpdir newname keep-date parents))
	    (tramp-compat-delete-directory tmpdir 'recursive))))
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       ;; We can copy recursively.
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       ((or t1 t2)
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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))
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	    (make-directory newname parents))
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	(setq tramp-current-method (tramp-file-name-method v)
	      tramp-current-user (tramp-file-name-user v)
	      tramp-current-host (tramp-file-name-real-host v))

	(let* ((real-user (tramp-file-name-real-user v))
	       (real-host (tramp-file-name-real-host v))
	       (domain    (tramp-file-name-domain v))
	       (port      (tramp-file-name-port v))
	       (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 tramp-smb-program
				(concat "//" real-host "/" share) "-E")))

	  (if (not (zerop (length real-user)))
	      (setq args (append args (list "-U" real-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" (shell-quote-argument localname)
				  "-c" (shell-quote-argument "tar qc - *")
				  "|" "tar" "xfC" "-"
				  (shell-quote-argument tmpdir)))
		  ;; Target is remote.
		  (append (list "tar" "cfC" "-" (shell-quote-argument dirname)
				"." "|")
			  args
			  (list "-D" (shell-quote-argument localname)
				"-c" (shell-quote-argument "tar qx -")))))

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	  (unwind-protect
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	      (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 (start-process-shell-command
			   (tramp-get-connection-name v)
			   (tramp-get-connection-buffer v)
			   (mapconcat 'identity args " "))))

		  (tramp-message
		   v 6 "%s" (mapconcat 'identity (process-command p) " "))
		  (tramp-compat-set-process-query-on-exit-flag p nil)
		  (tramp-process-actions p v nil tramp-smb-actions-with-tar)

		  (while (memq (process-status p) '(run open))
		    (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)
	    (when t1 (delete-directory tmpdir 'recurse))))

	;; Handle KEEP-DATE argument.
	(when keep-date
	  (set-file-times newname (nth 5 (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-property v (file-name-directory localname))
	    (tramp-flush-file-property v localname))))
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       ;; We must do it file-wise.
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       (t
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	(tramp-run-real-handler
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	 '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 (file-remote-p filename) filename newname))
      0 (format "Copying %s to %s" filename newname)

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    (if (file-directory-p filename)
	(tramp-compat-copy-directory filename newname keep-date t t)

      (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
	       v 'file-error "Target `%s' must contain a share name" newname))
	    (unless (tramp-smb-send-command
		     v (format "put \"%s\" \"%s\""
			       filename (tramp-smb-get-localname v)))
	      (tramp-error v 'file-error "Cannot copy `%s'" filename))))))
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    ;; KEEP-DATE handling.
    (when keep-date
      (set-file-times newname (nth 5 (file-attributes filename))))))
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(defun tramp-smb-handle-delete-directory (directory &optional recursive)
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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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    (if recursive
	(mapc
	 (lambda (file)
	   (if (file-directory-p file)
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	       (tramp-compat-delete-directory file recursive)
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	     (delete-file file)))
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	 ;; We do not want to delete "." and "..".
	 (directory-files
	  directory 'full "^\\([^.]\\|\\.\\([^.]\\|\\..\\)\\).*")))
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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
	   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
	   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
			(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
	     (lambda (x) (expand-file-name x directory))
	     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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    ;; That's it.
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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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		   (tramp-file-name-real-user v)
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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
       method user host
       (tramp-run-real-handler 'expand-file-name (list localname))))))

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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"
      (when (tramp-smb-send-command
	     v (format "getfacl \"%s\"" (tramp-smb-get-localname v)))
	(with-current-buffer (tramp-get-connection-buffer v)
	  (goto-char (point-min))
	  (while (looking-at-p "^#")
	    (forward-line)
	    (delete-region (point-min) (point)))
	  (goto-char (point-max))
	  (delete-blank-lines)
	  (when (> (point-max) (point-min))
	    (substring-no-properties (buffer-string))))))))

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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 (and (tramp-smb-get-share v) (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
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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)
       (eq ?d (aref (nth 8 (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
       v 'file-error
       "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
	   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
   (with-parsed-tramp-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
	 (let ((entries (tramp-smb-get-file-entries directory)))
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	   (mapcar
	    (lambda (x)
	      (list
	       (if (string-match "d" (nth 1 x))
		   (file-name-as-directory (nth 0 x))
		 (nth 0 x))))
	    entries)))))))

(defun tramp-smb-handle-file-writable-p (filename)
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  "Like `file-writable-p' for Tramp files."
  (if (file-exists-p filename)
      (string-match "w" (or (nth 8 (file-attributes filename)) ""))
    (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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  (if full-directory-p
      ;; Called from `dired-add-entry'.
      (setq filename (file-name-as-directory filename))
    (setq filename (directory-file-name filename)))
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  (with-parsed-tramp-file-name filename nil
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    (save-match-data
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      (let ((base (file-name-nondirectory filename))
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	    ;; We should not destroy the cache entry.
	    (entries (copy-sequence
		      (tramp-smb-get-file-entries
		       (file-name-directory filename)))))

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

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	;; Handle "-F" switch.
	(when (string-match "F" switches)
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	  (mapc
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	   (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))

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	;; Print entries.
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	(mapc
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	 (lambda (x)
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	   (when (not (zerop (length (nth 0 x))))
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	     (let ((attr
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		    (when (tramp-smb-get-stat-capability v)
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		      (ignore-errors
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			(file-attributes filename 'string)))))
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	       (insert
		(format
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		 "%10s %3d %-8s %-8s %8s %s "
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		 (or (nth 8 attr) (nth 1 x)) ; mode
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		 (or (nth 1 attr) 1) ; inode
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		 (or (nth 2 attr) "nobody") ; uid
		 (or (nth 3 attr) "nogroup") ; gid
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		 (or (nth 7 attr) (nth 2 x)) ; size
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		 (format-time-string
		  (if (tramp-time-less-p
		       (tramp-time-subtract (current-time) (nth 3 x))
		       tramp-half-a-year)
		      "%b %e %R"
		    "%b %e  %Y")
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		  (nth 3 x)))) ; date
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	       ;; We mark the file name.  The inserted name could be
	       ;; from somewhere else, so we use the relative file
	       ;; name of `default-directory'.
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	       (let ((start (point)))
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		 (insert
		  (format
		   "%s\n"
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		   (file-relative-name
		    (expand-file-name
		     (nth 0 x) (file-name-directory filename)))))
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		 (put-text-property start (1- (point)) 'dired-filename t))
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	       (forward-line)
	       (beginning-of-line))))
	 entries)))))
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(defun tramp-smb-handle-make-directory (dir &optional parents)
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  "Like `make-directory' for Tramp files."
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  (setq dir (directory-file-name (expand-file-name dir)))
  (unless (file-name-absolute-p dir)
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    (setq dir (expand-file-name dir default-directory)))
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  (with-parsed-tramp-file-name dir nil
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    (save-match-data
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      (let* ((ldir (file-name-directory dir)))
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	;; Make missing directory parts.
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	(when (and parents
		   (tramp-smb-get-share v)
		   (not (file-directory-p ldir)))
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	  (make-directory ldir parents))
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	;; Just do it.
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	(when (file-directory-p ldir)
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	  (make-directory-internal dir))
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	(unless (file-directory-p dir)
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	  (tramp-error v 'file-error "Couldn't make directory %s" dir))))))
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(defun tramp-smb-handle-make-directory-internal (directory)
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  "Like `make-directory-internal' for Tramp files."
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  (setq directory (directory-file-name (expand-file-name directory)))
  (unless (file-name-absolute-p directory)
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    (setq directory (expand-file-name directory default-directory)))
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  (with-parsed-tramp-file-name directory nil
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    (save-match-data
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      (let* ((file (tramp-smb-get-localname v)))
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	(when (file-directory-p (file-name-directory directory))
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	  (tramp-smb-send-command
	   v
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	   (if (tramp-smb-get-cifs-capabilities v)
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	       (format
		"posix_mkdir \"%s\" %s"
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		file (tramp-compat-decimal-to-octal (default-file-modes)))
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	     (format "mkdir \"%s\"" file)))
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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.
	  (tramp-flush-file-property v (file-name-directory localname))
	  (tramp-flush-file-property v localname))
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	(unless (file-directory-p directory)
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	  (tramp-error
	   v 'file-error "Couldn't make directory %s" directory))))))
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(defun tramp-smb-handle-make-symbolic-link
  (filename linkname &optional ok-if-already-exists)
  "Like `make-symbolic-link' for Tramp files.
If LINKNAME is a non-Tramp file, it is used verbatim as the target of
the symlink.  If LINKNAME is a Tramp file, only the localname component is
used as the target of the symlink.

If LINKNAME is a Tramp file and the localname component is relative, then
it is expanded first, before the localname component is taken.  Note that
this can give surprising results if the user/host for the source and
target of the symlink differ."
  (unless (tramp-equal-remote filename linkname)
    (with-parsed-tramp-file-name
	(if (tramp-tramp-file-p filename) filename linkname) nil
      (tramp-error
       v 'file-error
       "make-symbolic-link: %s"
       "only implemented for same method, same user, same host")))
  (with-parsed-tramp-file-name filename v1
    (with-parsed-tramp-file-name linkname v2
      (when (file-directory-p filename)
	(tramp-error
	 v2 'file-error
	 "make-symbolic-link: %s must not be a directory" filename))
      (when (and (not ok-if-already-exists)
		 (file-exists-p linkname)
		 (not (numberp ok-if-already-exists))
		 (y-or-n-p
		  (format
		   "File %s already exists; make it a new name anyway? "
		   linkname)))
	(tramp-error
	 v2 'file-error
	 "make-symbolic-link: file %s already exists" linkname))
      (unless (tramp-smb-get-cifs-capabilities v1)
	(tramp-error v2 '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-property v2 (file-name-directory v2-localname))
      (tramp-flush-file-property v2 v2-localname)
      (unless
	  (tramp-smb-send-command
	   v1
	   (format
	    "symlink \"%s\" \"%s\""
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	    (tramp-smb-get-localname v1)
	    (tramp-smb-get-localname v2)))
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	(tramp-error
	 v2 'file-error
	 "error with make-symbolic-link, see buffer `%s' for details"
	 (buffer-name))))))

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(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))