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;;; tramp-gvfs.el --- Tramp access functions for GVFS daemon

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;; Copyright (C) 2009-2012 Free Software Foundation, Inc.
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;; Author: Michael Albinus <michael.albinus@gmx.de>
;; Keywords: comm, processes
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;; Package: tramp
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;; This file is part of GNU Emacs.

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

;;; Commentary:

;; Access functions for the GVFS daemon from Tramp.  Tested with GVFS
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;; 1.0.2 (Ubuntu 8.10, Gnome 2.24).  It has been reported also to run
;; with GVFS 0.2.5 (Ubuntu 8.04, Gnome 2.22), but there is an
;; incompatibility with the mount_info structure, which has been
;; worked around.
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;; It has also been tested with GVFS 1.6.2 (Ubuntu 10.04, Gnome 2.30),
;; where the default_location has been added to mount_info (see
;; <https://bugzilla.gnome.org/show_bug.cgi?id=561998>.

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;; All actions to mount a remote location, and to retrieve mount
;; information, are performed by D-Bus messages.  File operations
;; themselves are performed via the mounted filesystem in ~/.gvfs.
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;; Consequently, GNU Emacs 23.1 with enabled D-Bus bindings is a
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;; precondition.

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;; The GVFS D-Bus interface is said to be unstable.  There are even no
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;; introspection data.  The interface, as discovered during
;; development time, is given in respective comments.

;; The customer option `tramp-gvfs-methods' contains the list of
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;; supported connection methods.  Per default, these are "dav",
;; "davs", "obex" and "synce".  Note that with "obex" it might be
;; necessary to pair with the other bluetooth device, if it hasn't
;; been done already.  There might be also some few seconds delay in
;; discovering available bluetooth devices.
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;; Other possible connection methods are "ftp", "sftp" and "smb".
;; When one of these methods is added to the list, the remote access
;; for that method is performed via GVFS instead of the native Tramp
;; implementation.

;; GVFS offers even more connection methods.  The complete list of
;; connection methods of the actual GVFS implementation can be
;; retrieved by:
;;
;; (message
;;  "%s"
;;  (mapcar
;;   'car
;;   (dbus-call-method
;;    :session tramp-gvfs-service-daemon tramp-gvfs-path-mounttracker
;;    tramp-gvfs-interface-mounttracker "listMountableInfo")))

;; Note that all other connection methods are not tested, beside the
;; ones offered for customization in `tramp-gvfs-methods'.  If you
;; request an additional connection method to be supported, please
;; drop me a note.

;; For hostname completion, information is retrieved either from the
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;; bluez daemon (for the "obex" method), the hal daemon (for the
;; "synce" method), or from the zeroconf daemon (for the "dav",
;; "davs", and "sftp" methods).  The zeroconf daemon is pre-configured
;; to discover services in the "local" domain.  If another domain
;; shall be used for discovering services, the customer option
;; `tramp-gvfs-zeroconf-domain' can be set accordingly.
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;; Restrictions:

;; * The current GVFS implementation does not allow to write on the
;;   remote bluetooth device via OBEX.
;;
;; * Two shares of the same SMB server cannot be mounted in parallel.

;;; Code:

;; D-Bus support in the Emacs core can be disabled with configuration
;; option "--without-dbus".  Declare used subroutines and variables.
(declare-function dbus-get-unique-name "dbusbind.c")

;; Pacify byte-compiler
(eval-when-compile
  (require 'cl)
  (require 'custom))

(require 'tramp)
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(require 'dbus)
(require 'url-parse)
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(require 'url-util)
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(require 'zeroconf)

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;;;###tramp-autoload
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(defcustom tramp-gvfs-methods '("dav" "davs" "obex" "synce")
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  "List of methods for remote files, accessed with GVFS."
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  :group 'tramp
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  :version "23.2"
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  :type '(repeat (choice (const "dav")
			 (const "davs")
			 (const "ftp")
			 (const "obex")
			 (const "sftp")
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			 (const "smb")
			 (const "synce"))))
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;; Add a default for `tramp-default-user-alist'.  Rule: For the SYNCE
;; method, no user is chosen.
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;;;###tramp-autoload
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(add-to-list 'tramp-default-user-alist '("\\`synce\\'" nil nil))
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(defcustom tramp-gvfs-zeroconf-domain "local"
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  "Zeroconf domain to be used for discovering services, like host names."
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  :group 'tramp
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  :version "23.2"
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  :type 'string)

;; Add the methods to `tramp-methods', in order to allow minibuffer
;; completion.
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;;;###tramp-autoload
(when (featurep 'dbusbind)
  (dolist (elt tramp-gvfs-methods)
    (unless (assoc elt tramp-methods)
      (add-to-list 'tramp-methods (cons elt nil)))))
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(defconst tramp-gvfs-path-tramp (concat dbus-path-emacs "/Tramp")
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  "The preceding object path for own objects.")
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(defconst tramp-gvfs-service-daemon "org.gtk.vfs.Daemon"
  "The well known name of the GVFS daemon.")

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;; Check that GVFS is available.  D-Bus integration is available since
;; Emacs 23 on some system types.  We don't call `dbus-ping', because
;; this would load dbus.el.
(unless (and (tramp-compat-funcall 'dbus-get-unique-name :session)
	     (tramp-compat-process-running-p "gvfs-fuse-daemon"))
  (error "Package `tramp-gvfs' not supported"))
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(defconst tramp-gvfs-path-mounttracker "/org/gtk/vfs/mounttracker"
  "The object path of the GVFS daemon.")

(defconst tramp-gvfs-interface-mounttracker "org.gtk.vfs.MountTracker"
  "The mount tracking interface in the GVFS daemon.")

;; <interface name='org.gtk.vfs.MountTracker'>
;;   <method name='listMounts'>
;;     <arg name='mount_info_list'
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;;          type='a{sosssssbay{aya{say}}ay}'
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;;          direction='out'/>
;;   </method>
;;   <method name='mountLocation'>
;;     <arg name='mount_spec'  type='{aya{say}}' direction='in'/>
;;     <arg name='dbus_id'     type='s'          direction='in'/>
;;     <arg name='object_path' type='o'          direction='in'/>
;;   </method>
;;   <signal name='mounted'>
;;     <arg name='mount_info'
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;;          type='{sosssssbay{aya{say}}ay}'/>
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;;   </signal>
;;   <signal name='unmounted'>
;;     <arg name='mount_info'
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;;          type='{sosssssbay{aya{say}}ay}'/>
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;;   </signal>
;; </interface>
;;
;; STRUCT		mount_info
;;   STRING		  dbus_id
;;   OBJECT_PATH	  object_path
;;   STRING		  display_name
;;   STRING		  stable_name
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;;   STRING		  x_content_types	Since GVFS 1.0 only !!!
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;;   STRING		  icon
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;;   STRING		  preferred_filename_encoding
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;;   BOOLEAN		  user_visible
;;   ARRAY BYTE		  fuse_mountpoint
;;   STRUCT		  mount_spec
;;     ARRAY BYTE	    mount_prefix
;;     ARRAY
;;       STRUCT		    mount_spec_item
;;         STRING	      key (server, share, type, user, host, port)
;;         ARRAY BYTE	      value
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;;   ARRAY BYTE           default_location	Since GVFS 1.5 only !!!
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(defconst tramp-gvfs-interface-mountoperation "org.gtk.vfs.MountOperation"
  "Used by the dbus-proxying implementation of GMountOperation.")

;; <interface name='org.gtk.vfs.MountOperation'>
;;   <method name='askPassword'>
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;;     <arg name='message'        type='s' direction='in'/>
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;;     <arg name='default_user'   type='s' direction='in'/>
;;     <arg name='default_domain' type='s' direction='in'/>
;;     <arg name='flags'          type='u' direction='in'/>
;;     <arg name='handled'        type='b' direction='out'/>
;;     <arg name='aborted'        type='b' direction='out'/>
;;     <arg name='password'       type='s' direction='out'/>
;;     <arg name='username'       type='s' direction='out'/>
;;     <arg name='domain'         type='s' direction='out'/>
;;     <arg name='anonymous'      type='b' direction='out'/>
;;     <arg name='password_save'  type='u' direction='out'/>
;;   </method>
;;   <method name='askQuestion'>
;;     <arg name='message' type='s'  direction='in'/>
;;     <arg name='choices' type='as' direction='in'/>
;;     <arg name='handled' type='b'  direction='out'/>
;;     <arg name='aborted' type='b'  direction='out'/>
;;     <arg name='choice'  type='u'  direction='out'/>
;;   </method>
;; </interface>

;; The following flags are used in "askPassword".  They are defined in
;; /usr/include/glib-2.0/gio/gioenums.h.

(defconst tramp-gvfs-password-need-password 1
  "Operation requires a password.")

(defconst tramp-gvfs-password-need-username 2
  "Operation requires a username.")

(defconst tramp-gvfs-password-need-domain 4
  "Operation requires a domain.")

(defconst tramp-gvfs-password-saving-supported 8
  "Operation supports saving settings.")

(defconst tramp-gvfs-password-anonymous-supported 16
  "Operation supports anonymous users.")

(defconst tramp-bluez-service "org.bluez"
  "The well known name of the BLUEZ service.")

(defconst tramp-bluez-interface-manager "org.bluez.Manager"
  "The manager interface of the BLUEZ daemon.")

;; <interface name='org.bluez.Manager'>
;;   <method name='DefaultAdapter'>
;;     <arg type='o' direction='out'/>
;;   </method>
;;   <method name='FindAdapter'>
;;     <arg type='s' direction='in'/>
;;     <arg type='o' direction='out'/>
;;   </method>
;;   <method name='ListAdapters'>
;;     <arg type='ao' direction='out'/>
;;   </method>
;;   <signal name='AdapterAdded'>
;;     <arg type='o'/>
;;   </signal>
;;   <signal name='AdapterRemoved'>
;;     <arg type='o'/>
;;   </signal>
;;   <signal name='DefaultAdapterChanged'>
;;     <arg type='o'/>
;;   </signal>
;; </interface>

(defconst tramp-bluez-interface-adapter "org.bluez.Adapter"
  "The adapter interface of the BLUEZ daemon.")

;; <interface name='org.bluez.Adapter'>
;;   <method name='GetProperties'>
;;     <arg type='a{sv}' direction='out'/>
;;   </method>
;;   <method name='SetProperty'>
;;     <arg type='s' direction='in'/>
;;     <arg type='v' direction='in'/>
;;   </method>
;;   <method name='RequestMode'>
;;     <arg type='s' direction='in'/>
;;   </method>
;;   <method name='ReleaseMode'/>
;;   <method name='RequestSession'/>
;;   <method name='ReleaseSession'/>
;;   <method name='StartDiscovery'/>
;;   <method name='StopDiscovery'/>
;;   <method name='ListDevices'>
;;     <arg type='ao' direction='out'/>
;;   </method>
;;   <method name='CreateDevice'>
;;     <arg type='s' direction='in'/>
;;     <arg type='o' direction='out'/>
;;   </method>
;;   <method name='CreatePairedDevice'>
;;     <arg type='s' direction='in'/>
;;     <arg type='o' direction='in'/>
;;     <arg type='s' direction='in'/>
;;     <arg type='o' direction='out'/>
;;   </method>
;;   <method name='CancelDeviceCreation'>
;;     <arg type='s' direction='in'/>
;;   </method>
;;   <method name='RemoveDevice'>
;;     <arg type='o' direction='in'/>
;;   </method>
;;   <method name='FindDevice'>
;;     <arg type='s' direction='in'/>
;;     <arg type='o' direction='out'/>
;;   </method>
;;   <method name='RegisterAgent'>
;;     <arg type='o' direction='in'/>
;;     <arg type='s' direction='in'/>
;;   </method>
;;   <method name='UnregisterAgent'>
;;     <arg type='o' direction='in'/>
;;   </method>
;;   <signal name='DeviceCreated'>
;;     <arg type='o'/>
;;   </signal>
;;   <signal name='DeviceRemoved'>
;;     <arg type='o'/>
;;   </signal>
;;   <signal name='DeviceFound'>
;;     <arg type='s'/>
;;     <arg type='a{sv}'/>
;;   </signal>
;;   <signal name='PropertyChanged'>
;;     <arg type='s'/>
;;     <arg type='v'/>
;;   </signal>
;;   <signal name='DeviceDisappeared'>
;;     <arg type='s'/>
;;   </signal>
;; </interface>

(defcustom tramp-bluez-discover-devices-timeout 60
  "Defines seconds since last bluetooth device discovery before rescanning.
A value of 0 would require an immediate discovery during hostname
completion, nil means to use always cached values for discovered
devices."
  :group 'tramp
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  :version "23.2"
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  :type '(choice (const nil) integer))

(defvar tramp-bluez-discovery nil
  "Indicator for a running bluetooth device discovery.
It keeps the timestamp of last discovery.")

(defvar tramp-bluez-devices nil
  "Alist of detected bluetooth devices.
Every entry is a list (NAME ADDRESS).")

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(defconst tramp-hal-service "org.freedesktop.Hal"
  "The well known name of the HAL service.")

(defconst tramp-hal-path-manager "/org/freedesktop/Hal/Manager"
  "The object path of the HAL daemon manager.")

(defconst tramp-hal-interface-manager "org.freedesktop.Hal.Manager"
  "The manager interface of the HAL daemon.")

(defconst tramp-hal-interface-device "org.freedesktop.Hal.Device"
  "The device interface of the HAL daemon.")


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;; New handlers should be added here.
(defconst tramp-gvfs-file-name-handler-alist
  '(
    (access-file . ignore)
    (add-name-to-file . tramp-gvfs-handle-copy-file)
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    ;; `byte-compiler-base-file-name' performed by default handler.
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    (copy-file . tramp-gvfs-handle-copy-file)
    (delete-directory . tramp-gvfs-handle-delete-directory)
    (delete-file . tramp-gvfs-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)
    (directory-files . tramp-gvfs-handle-directory-files)
    (directory-files-and-attributes
     . tramp-gvfs-handle-directory-files-and-attributes)
    (dired-call-process . ignore)
    (dired-compress-file . ignore)
    (dired-uncache . tramp-handle-dired-uncache)
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    ;; `executable-find' is not official yet. performed by default handler.
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    (expand-file-name . tramp-gvfs-handle-expand-file-name)
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    ;; `file-accessible-directory-p' performed by default handler.
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    (file-acl . tramp-gvfs-handle-file-acl)
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    (file-attributes . tramp-gvfs-handle-file-attributes)
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    (file-directory-p . tramp-gvfs-handle-file-directory-p)
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    (file-executable-p . tramp-gvfs-handle-file-executable-p)
    (file-exists-p . tramp-gvfs-handle-file-exists-p)
    (file-local-copy . tramp-gvfs-handle-file-local-copy)
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    ;; `file-modes' performed by default handler.
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    (file-name-all-completions . tramp-gvfs-handle-file-name-all-completions)
    (file-name-as-directory . tramp-handle-file-name-as-directory)
    (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)
    (file-ownership-preserved-p . ignore)
    (file-readable-p . tramp-gvfs-handle-file-readable-p)
    (file-regular-p . tramp-handle-file-regular-p)
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    (file-remote-p . tramp-handle-file-remote-p)
    (file-selinux-context . tramp-gvfs-handle-file-selinux-context)
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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-gvfs-handle-file-writable-p)
    (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-gvfs-handle-insert-directory)
    (insert-file-contents . tramp-gvfs-handle-insert-file-contents)
    (load . tramp-handle-load)
    (make-directory . tramp-gvfs-handle-make-directory)
    (make-directory-internal . ignore)
    (make-symbolic-link . ignore)
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    (process-file . tramp-gvfs-handle-process-file)
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    (rename-file . tramp-gvfs-handle-rename-file)
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    (set-file-acl . tramp-gvfs-handle-set-file-acl)
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    (set-file-modes . tramp-gvfs-handle-set-file-modes)
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    (set-file-selinux-context . tramp-gvfs-handle-set-file-selinux-context)
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    (set-visited-file-modtime . tramp-gvfs-handle-set-visited-file-modtime)
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    (shell-command . tramp-gvfs-handle-shell-command)
    (start-file-process . tramp-gvfs-handle-start-file-process)
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    (substitute-in-file-name . tramp-handle-substitute-in-file-name)
    (unhandled-file-name-directory . tramp-handle-unhandled-file-name-directory)
    (vc-registered . ignore)
    (verify-visited-file-modtime
     . tramp-gvfs-handle-verify-visited-file-modtime)
    (write-region . tramp-gvfs-handle-write-region)
)
  "Alist of handler functions for Tramp GVFS method.
Operations not mentioned here will be handled by the default Emacs primitives.")

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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-gvfs-file-name-p (filename)
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  "Check if it's a filename handled by the GVFS daemon."
  (and (tramp-tramp-file-p filename)
       (let ((method
	      (tramp-file-name-method (tramp-dissect-file-name filename))))
	 (and (stringp method) (member method tramp-gvfs-methods)))))

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

;; This might be moved to tramp.el.  It shall be the first file name
;; handler.
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;;;###tramp-autoload
(when (featurep 'dbusbind)
  (add-to-list 'tramp-foreign-file-name-handler-alist
	       (cons 'tramp-gvfs-file-name-p 'tramp-gvfs-file-name-handler)))
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(defun tramp-gvfs-stringify-dbus-message (message)
  "Convert a D-Bus message into readable UTF8 strings, used for traces."
  (cond
   ((and (consp message) (characterp (car message)))
    (format "%S" (dbus-byte-array-to-string message)))
   ((consp message)
    (mapcar 'tramp-gvfs-stringify-dbus-message message))
   ((stringp message)
    (format "%S" message))
   (t message)))

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(defmacro with-tramp-dbus-call-method
  (vec synchronous bus service path interface method &rest args)
  "Apply a D-Bus call on bus BUS.

If SYNCHRONOUS is non-nil, the call is synchronously.  Otherwise,
it is an asynchronous call, with `ignore' as callback function.

The other arguments have the same meaning as with `dbus-call-method'
or `dbus-call-method-asynchronously'.  Additionally, the call
will be traced by Tramp with trace level 6."
  `(let ((func (if ,synchronous
		   'dbus-call-method 'dbus-call-method-asynchronously))
	 (args (append (list ,bus ,service ,path ,interface ,method)
		       (if ,synchronous (list ,@args) (list 'ignore ,@args))))
	 result)
     (tramp-message ,vec 6 "%s %s" func args)
     (setq result (apply func args))
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     (tramp-message ,vec 6 "%s" (tramp-gvfs-stringify-dbus-message result))
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     result))

(put 'with-tramp-dbus-call-method 'lisp-indent-function 2)
(put 'with-tramp-dbus-call-method 'edebug-form-spec '(form symbolp body))
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(tramp-compat-font-lock-add-keywords
 'emacs-lisp-mode '("\\<with-tramp-dbus-call-method\\>"))
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(defmacro with-tramp-gvfs-error-message (filename handler &rest args)
  "Apply a Tramp GVFS `handler'.
In case of an error, modify the error message by replacing
`filename' with its GVFS mounted name."
  `(let ((fuse-file-name  (regexp-quote (tramp-gvfs-fuse-file-name ,filename)))
	 elt)
     (condition-case err
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	 (tramp-compat-funcall ,handler ,@args)
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       (error
	(setq elt (cdr err))
	(while elt
	  (when (and (stringp (car elt))
		     (string-match fuse-file-name (car elt)))
	    (setcar elt (replace-match ,filename t t (car elt))))
	  (setq elt (cdr elt)))
	(signal (car err) (cdr err))))))

(put 'with-tramp-gvfs-error-message 'lisp-indent-function 2)
(put 'with-tramp-gvfs-error-message 'edebug-form-spec '(form symbolp body))
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(tramp-compat-font-lock-add-keywords
 'emacs-lisp-mode '("\\<with-tramp-gvfs-error-message\\>"))
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(defvar tramp-gvfs-dbus-event-vector nil
  "Current Tramp file name to be used, as vector.
It is needed when D-Bus signals or errors arrive, because there
is no information where to trace the message.")

(defun tramp-gvfs-dbus-event-error (event err)
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  "Called when a D-Bus error message arrives, see `dbus-event-error-functions'."
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  (when tramp-gvfs-dbus-event-vector
    (tramp-message tramp-gvfs-dbus-event-vector 10 "%S" event)
    (tramp-error tramp-gvfs-dbus-event-vector 'file-error "%s" (cadr err))))
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;; `dbus-event-error-hooks' has been renamed to `dbus-event-error-functions'.
(add-hook
 (if (boundp 'dbus-event-error-functions)
     'dbus-event-error-functions 'dbus-event-error-hooks)
 'tramp-gvfs-dbus-event-error)
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;; File name primitives.

(defun tramp-gvfs-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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  (with-parsed-tramp-file-name
      (if (tramp-tramp-file-p filename) filename newname) nil
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    (with-tramp-progress-reporter
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	v 0 (format "Copying %s to %s" filename newname)
      (condition-case err
	  (let ((args
		 (list
		  (if (tramp-gvfs-file-name-p filename)
		      (tramp-gvfs-fuse-file-name filename)
		    filename)
		  (if (tramp-gvfs-file-name-p newname)
		      (tramp-gvfs-fuse-file-name newname)
		    newname)
		  ok-if-already-exists keep-date preserve-uid-gid)))
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	    (when preserve-extended-attributes
	      (setq args (append args (list preserve-extended-attributes))))
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	    (apply 'copy-file args))

	;; Error case.  Let's try it with the GVFS utilities.
	(error
	 (tramp-message v 4 "`copy-file' failed, trying `gvfs-copy'")
	 (unless
	     (zerop
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	      (let ((args
		     (append (if (or keep-date preserve-uid-gid)
				 (list "--preserve")
			       nil)
			     (list
			      (tramp-gvfs-url-file-name filename)
			      (tramp-gvfs-url-file-name newname)))))
		(apply 'tramp-gvfs-send-command v "gvfs-copy" args)))
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	   ;; Propagate the error.
	   (tramp-error v (car err) "%s" (cdr err)))))))

  (when (file-remote-p newname)
    (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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(defun tramp-gvfs-handle-delete-directory (directory &optional recursive)
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  "Like `delete-directory' for Tramp files."
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  (tramp-compat-delete-directory
   (tramp-gvfs-fuse-file-name directory) recursive))
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(defun tramp-gvfs-handle-delete-file (filename &optional trash)
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  "Like `delete-file' for Tramp files."
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  (tramp-compat-delete-file (tramp-gvfs-fuse-file-name filename) trash))
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(defun tramp-gvfs-handle-directory-files
  (directory &optional full match nosort)
  "Like `directory-files' for Tramp files."
  (let ((fuse-file-name (tramp-gvfs-fuse-file-name directory)))
    (mapcar
     (lambda (x)
       (if (string-match fuse-file-name x)
	   (replace-match directory t t x)
	 x))
     (directory-files fuse-file-name full match nosort))))

(defun tramp-gvfs-handle-directory-files-and-attributes
  (directory &optional full match nosort id-format)
  "Like `directory-files-and-attributes' for Tramp files."
  (let ((fuse-file-name (tramp-gvfs-fuse-file-name directory)))
    (mapcar
     (lambda (x)
       (when (string-match fuse-file-name (car x))
	 (setcar x (replace-match directory t t (car x))))
       x)
     (directory-files-and-attributes
      fuse-file-name full match nosort id-format))))

(defun tramp-gvfs-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
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      ;; If there is a default location, expand tilde.
      (when (string-match "\\`\\(~\\)\\(/\\|\\'\\)" localname)
	(save-match-data
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	  (tramp-gvfs-maybe-open-connection (vector method user host "/" hop)))
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	(setq localname
	      (replace-match
	       (tramp-get-file-property  v "/" "default-location" "~")
	       nil t localname 1)))
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      ;; Tilde expansion is not possible.
      (when (string-match "\\`\\(~[^/]*\\)\\(.*\\)\\'" localname)
	(tramp-error
	 v 'file-error
	 "Cannot expand tilde in file `%s'" name))
      (unless (tramp-run-real-handler 'file-name-absolute-p (list localname))
	(setq localname (concat "/" localname)))
      ;; We do not pass "/..".
      (if (string-equal "smb" method)
	  (when (string-match "^/[^/]+\\(/\\.\\./?\\)" localname)
	    (setq localname (replace-match "/" t t localname 1)))
	(when (string-match "^/\\.\\./?" localname)
	  (setq localname (replace-match "/" t t localname))))
      ;; There might be a double slash.  Remove this.
      (while (string-match "//" localname)
	(setq localname (replace-match "/" t t localname)))
      ;; 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-gvfs-handle-file-acl (filename)
  "Like `file-acl' for Tramp files."
  (tramp-compat-funcall 'file-acl (tramp-gvfs-fuse-file-name filename)))

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(defun tramp-gvfs-handle-file-attributes (filename &optional id-format)
  "Like `file-attributes' for Tramp files."
  (file-attributes (tramp-gvfs-fuse-file-name filename) id-format))

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(defun tramp-gvfs-handle-file-directory-p (filename)
  "Like `file-directory-p' for Tramp files."
  (file-directory-p (tramp-gvfs-fuse-file-name filename)))

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(defun tramp-gvfs-handle-file-executable-p (filename)
  "Like `file-executable-p' for Tramp files."
  (file-executable-p (tramp-gvfs-fuse-file-name filename)))

(defun tramp-gvfs-handle-file-exists-p (filename)
  "Like `file-exists-p' for Tramp files."
  (file-exists-p (tramp-gvfs-fuse-file-name filename)))

(defun tramp-gvfs-handle-file-local-copy (filename)
  "Like `file-local-copy' for Tramp files."
  (with-parsed-tramp-file-name filename nil
    (let ((tmpfile (tramp-compat-make-temp-file filename)))
      (unless (file-exists-p filename)
	(tramp-error
	 v 'file-error
	 "Cannot make local copy of non-existing file `%s'" filename))
      (copy-file filename tmpfile t t)
      tmpfile)))

(defun tramp-gvfs-handle-file-name-all-completions (filename directory)
  "Like `file-name-all-completions' for Tramp files."
  (unless (save-match-data (string-match "/" filename))
    (file-name-all-completions filename (tramp-gvfs-fuse-file-name directory))))

(defun tramp-gvfs-handle-file-readable-p (filename)
  "Like `file-readable-p' for Tramp files."
  (file-readable-p (tramp-gvfs-fuse-file-name filename)))

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(defun tramp-gvfs-handle-file-selinux-context (filename)
  "Like `file-selinux-context' for Tramp files."
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  (tramp-compat-funcall
   'file-selinux-context (tramp-gvfs-fuse-file-name filename)))
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(defun tramp-gvfs-handle-file-writable-p (filename)
  "Like `file-writable-p' for Tramp files."
  (file-writable-p (tramp-gvfs-fuse-file-name filename)))

(defun tramp-gvfs-handle-insert-directory
  (filename switches &optional wildcard full-directory-p)
  "Like `insert-directory' for Tramp files."
  (insert-directory
   (tramp-gvfs-fuse-file-name filename) switches wildcard full-directory-p))

(defun tramp-gvfs-handle-insert-file-contents
  (filename &optional visit beg end replace)
  "Like `insert-file-contents' for Tramp files."
  (unwind-protect
      (let ((fuse-file-name (tramp-gvfs-fuse-file-name filename))
	    (result
	     (insert-file-contents
	      (tramp-gvfs-fuse-file-name filename) visit beg end replace)))
	(when (string-match fuse-file-name (car result))
	  (setcar result (replace-match filename t t (car result))))
	result)
    (setq buffer-file-name filename)))

(defun tramp-gvfs-handle-make-directory (dir &optional parents)
  "Like `make-directory' for Tramp files."
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  (with-parsed-tramp-file-name dir nil
    (condition-case err
	(with-tramp-gvfs-error-message dir 'make-directory
	  (tramp-gvfs-fuse-file-name dir) parents)

      ;; Error case.  Let's try it with the GVFS utilities.
      (error
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       (tramp-message v 4 "`make-directory' failed, trying `gvfs-mkdir'")
       (unless
	   (zerop
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	    (tramp-gvfs-send-command
	     v "gvfs-mkdir" (tramp-gvfs-url-file-name dir)))
	 ;; Propagate the error.
	 (tramp-error v (car err) "%s" (cdr err)))))))
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(defun tramp-gvfs-handle-process-file
  (program &optional infile destination display &rest args)
  "Like `process-file' for Tramp files."
  (let ((default-directory (tramp-gvfs-fuse-file-name default-directory)))
    (apply 'call-process program infile destination display args)))

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(defun tramp-gvfs-handle-rename-file
  (filename newname &optional ok-if-already-exists)
  "Like `rename-file' for Tramp files."
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  (with-parsed-tramp-file-name
      (if (tramp-tramp-file-p filename) filename newname) nil
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    (with-tramp-progress-reporter
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	v 0 (format "Renaming %s to %s" filename newname)
      (condition-case err
	  (rename-file
	   (if (tramp-gvfs-file-name-p filename)
	       (tramp-gvfs-fuse-file-name filename)
	     filename)
	   (if (tramp-gvfs-file-name-p newname)
	       (tramp-gvfs-fuse-file-name newname)
	     newname)
	   ok-if-already-exists)

	;; Error case.  Let's try it with the GVFS utilities.
	(error
	 (tramp-message v 4 "`rename-file' failed, trying `gvfs-move'")
	 (unless
	     (zerop
	      (tramp-gvfs-send-command
	       v "gvfs-move"
	       (tramp-gvfs-url-file-name filename)
	       (tramp-gvfs-url-file-name newname)))
	   ;; Propagate the error.
	   (tramp-error v (car err) "%s" (cdr err)))))))

  (when (file-remote-p filename)
    (with-parsed-tramp-file-name filename nil
      (tramp-flush-file-property v (file-name-directory localname))
      (tramp-flush-file-property v localname)))

  (when (file-remote-p newname)
    (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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(defun tramp-gvfs-handle-set-file-acl (filename acl-string)
  "Like `set-file-acl' for Tramp files."
  (with-tramp-gvfs-error-message filename 'set-file-acl
    (tramp-gvfs-fuse-file-name filename) acl-string))

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(defun tramp-gvfs-handle-set-file-modes (filename mode)
  "Like `set-file-modes' for Tramp files."
  (with-tramp-gvfs-error-message filename 'set-file-modes
    (tramp-gvfs-fuse-file-name filename) mode))

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(defun tramp-gvfs-handle-set-file-selinux-context (filename context)
  "Like `set-file-selinux-context' for Tramp files."
  (with-tramp-gvfs-error-message filename 'set-file-selinux-context
    (tramp-gvfs-fuse-file-name filename) context))

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(defun tramp-gvfs-handle-set-visited-file-modtime (&optional time-list)
  "Like `set-visited-file-modtime' for Tramp files."
  (let ((buffer-file-name (tramp-gvfs-fuse-file-name (buffer-file-name))))
    (set-visited-file-modtime time-list)))

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(defun tramp-gvfs-handle-shell-command
  (command &optional output-buffer error-buffer)
  "Like `shell-command' for Tramp files."
  (let ((default-directory (tramp-gvfs-fuse-file-name default-directory)))
    (shell-command command output-buffer error-buffer)))

(defun tramp-gvfs-handle-start-file-process (name buffer program &rest args)
  "Like `start-file-process' for Tramp files."
  (let ((default-directory (tramp-gvfs-fuse-file-name default-directory)))
    (apply 'start-process name buffer program args)))

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(defun tramp-gvfs-handle-verify-visited-file-modtime (buf)
  "Like `verify-visited-file-modtime' for Tramp files."
  (with-current-buffer buf
    (let ((buffer-file-name (tramp-gvfs-fuse-file-name (buffer-file-name))))
      (verify-visited-file-modtime buf))))

(defun tramp-gvfs-handle-write-region
  (start end filename &optional append visit lockname confirm)
  "Like `write-region' for Tramp files."
  (with-parsed-tramp-file-name filename nil
    (condition-case err
	(with-tramp-gvfs-error-message filename 'write-region
	  start end (tramp-gvfs-fuse-file-name filename)
	  append visit lockname confirm)

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      ;; Error case.  Let's try rename.
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      (error
       (let ((tmpfile (tramp-compat-make-temp-file filename)))
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	 (tramp-message v 4 "`write-region' failed, trying `rename-file'")
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	 (write-region start end tmpfile)
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	 (condition-case nil
	     (rename-file tmpfile filename)
	   (error
	    (delete-file tmpfile)
	    (tramp-error v (car err) "%s" (cdr err)))))))
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    ;; Set file modification time.
    (when (or (eq visit t) (stringp visit))
      (set-visited-file-modtime (nth 5 (file-attributes filename))))

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


;; File name conversions.

(defun tramp-gvfs-url-file-name (filename)
  "Return FILENAME in URL syntax."
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  ;; "/" must NOT be hexlified.
  (let ((url-unreserved-chars (append '(?/) url-unreserved-chars)))
    (url-recreate-url
     (if (tramp-tramp-file-p filename)
	 (with-parsed-tramp-file-name (file-truename filename) nil
	   (when (string-match tramp-user-with-domain-regexp user)
	     (setq user
		   (concat (match-string 2 user) ";"  (match-string 2 user))))
	   (url-parse-make-urlobj
	    method user nil
	    (tramp-file-name-real-host v) (tramp-file-name-port v)
	    (url-hexify-string localname)))
       (url-parse-make-urlobj
	"file" nil nil nil nil (url-hexify-string (file-truename filename)))))))
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(defun tramp-gvfs-object-path (filename)
  "Create a D-Bus object path from FILENAME."
  (expand-file-name (dbus-escape-as-identifier filename) tramp-gvfs-path-tramp))

(defun tramp-gvfs-file-name (object-path)
  "Retrieve file name from D-Bus OBJECT-PATH."
  (dbus-unescape-from-identifier
   (replace-regexp-in-string "^.*/\\([^/]+\\)$" "\\1" object-path)))

(defun tramp-gvfs-fuse-file-name (filename)
  "Return FUSE file name, which is directly accessible."
  (with-parsed-tramp-file-name (expand-file-name filename) nil
    (tramp-gvfs-maybe-open-connection v)
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    (let ((prefix (tramp-get-file-property v "/" "prefix" ""))
	  (fuse-mountpoint
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	   (tramp-get-file-property v "/" "fuse-mountpoint" nil)))
      (unless fuse-mountpoint
	(tramp-error
	 v 'file-error "There is no FUSE mount point for `%s'" filename))
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      ;; We must hide the prefix, if any.
      (when (string-match (concat "^" (regexp-quote prefix)) localname)
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	(setq localname (replace-match "" t t localname)))
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      (tramp-message
       v 10 "remote file `%s' is local file `%s'"
       filename (concat fuse-mountpoint localname))
      (concat fuse-mountpoint localname))))
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(defun tramp-bluez-address (device)
  "Return bluetooth device address from a given bluetooth DEVICE name."
  (when (stringp device)
    (if (string-match tramp-ipv6-regexp device)
	(match-string 0 device)
      (cadr (assoc device (tramp-bluez-list-devices))))))

(defun tramp-bluez-device (address)
  "Return bluetooth device name from a given bluetooth device ADDRESS.
ADDRESS can have the form \"xx:xx:xx:xx:xx:xx\" or \"[xx:xx:xx:xx:xx:xx]\"."
  (when (stringp address)
    (while (string-match "[][]" address)
      (setq address (replace-match "" t t address)))
    (let (result)
      (dolist (item (tramp-bluez-list-devices) result)
	(when (string-match address (cadr item))
	  (setq result (car item)))))))


;; D-Bus GVFS functions.

(defun tramp-gvfs-handler-askpassword (message user domain flags)
  "Implementation for the \"org.gtk.vfs.MountOperation.askPassword\" method."
  (let* ((filename
	  (tramp-gvfs-file-name (dbus-event-path-name last-input-event)))
	 (pw-prompt
	  (format
	   "%s for %s "
	   (if (string-match "\\([pP]assword\\|[pP]assphrase\\)" message)
	       (capitalize (match-string 1 message))
	     "Password")
	   filename))
	 password)

    (condition-case nil
	(with-parsed-tramp-file-name filename l
	  (when (and (zerop (length user))
		     (not
		      (zerop (logand flags tramp-gvfs-password-need-username))))
	    (setq user (read-string "User name: ")))
	  (when (and (zerop (length domain))
		     (not (zerop (logand flags tramp-gvfs-password-need-domain))))
	    (setq domain (read-string "Domain name: ")))

	  (tramp-message l 6 "%S %S %S %d" message user domain flags)
	  (setq tramp-current-method l-method
		tramp-current-user user
		tramp-current-host l-host
		password (tramp-read-passwd
			  (tramp-get-connection-process l) pw-prompt))

	  ;; Return result.
	  (if (stringp password)
	      (list
	       t ;; password handled.
	       nil ;; no abort of D-Bus.
	       password
	       (tramp-file-name-real-user l)
	       domain
	       nil ;; not anonymous.
	       0) ;; no password save.
	    ;; No password provided.
	    (list nil t "" (tramp-file-name-real-user l) domain nil 0)))

      ;; When QUIT is raised, we shall return this information to D-Bus.
      (quit (list nil t "" "" "" nil 0)))))

(defun tramp-gvfs-handler-askquestion (message choices)
  "Implementation for the \"org.gtk.vfs.MountOperation.askQuestion\" method."
  (save-window-excursion
    (let ((enable-recursive-minibuffers t)
	  choice)

      (condition-case nil
	  (with-parsed-tramp-file-name
	      (tramp-gvfs-file-name (dbus-event-path-name last-input-event)) nil
	    (tramp-message v 6 "%S %S" message choices)

	    ;; In theory, there can be several choices.  Until now,
	    ;; there is only the question whether to accept an unknown
	    ;; host signature.
	    (with-temp-buffer
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	      ;; Preserve message for `progress-reporter'.
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	      (tramp-compat-with-temp-message ""
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		(insert message)
		(pop-to-buffer (current-buffer))
		(setq choice (if (yes-or-no-p (concat (car choices) " ")) 0 1))
		(tramp-message v 6 "%d" choice)))
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	    ;; When the choice is "no", we set a dummy fuse-mountpoint
	    ;; in order to leave the timeout.
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	    (unless (zerop choice)
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	      (tramp-set-file-property v "/" "fuse-mountpoint" "/"))
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	    (list
	     t ;; handled.
	     nil ;; no abort of D-Bus.
	     choice))

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	;; When QUIT is raised, we shall return this information to D-Bus.
	(quit (list nil t 0))))))
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(defun tramp-gvfs-handler-mounted-unmounted (mount-info)
  "Signal handler for the \"org.gtk.vfs.MountTracker.mounted\" and
\"org.gtk.vfs.MountTracker.unmounted\" signals."
  (ignore-errors
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    (let ((signal-name (dbus-event-member-name last-input-event))
	  (elt mount-info))
      ;; Jump over the first elements of the mount info. Since there
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      ;; were changes in the entries, we cannot access dedicated
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      ;; elements.
      (while (stringp (car elt)) (setq elt (cdr elt)))
      (let* ((fuse-mountpoint (dbus-byte-array-to-string (cadr elt)))
	     (mount-spec (caddr elt))
	     (default-location (dbus-byte-array-to-string (cadddr elt)))
	     (method (dbus-byte-array-to-string
		      (cadr (assoc "type" (cadr mount-spec)))))
	     (user (dbus-byte-array-to-string
		    (cadr (assoc "user" (cadr mount-spec)))))
	     (domain (dbus-byte-array-to-string
		      (cadr (assoc "domain" (cadr mount-spec)))))
	     (host (dbus-byte-array-to-string
		    (cadr (or (assoc "host" (cadr mount-spec))
			      (assoc "server" (cadr mount-spec))))))
	     (port (dbus-byte-array-to-string
		    (cadr (assoc "port" (cadr mount-spec)))))
	     (ssl (dbus-byte-array-to-string
		   (cadr (assoc "ssl" (cadr mount-spec)))))
	     (prefix (concat (dbus-byte-array-to-string (car mount-spec))
			     (dbus-byte-array-to-string
			      (cadr (assoc "share" (cadr mount-spec)))))))
	(when (string-match "^smb" method)
	  (setq method "smb"))
	(when (string-equal "obex" method)
	  (setq host (tramp-bluez-device host)))
	(when (and (string-equal "dav" method) (string-equal "true" ssl))
	  (setq method "davs"))
	(unless (zerop (length domain))
	  (setq user (concat user tramp-prefix-domain-format domain)))
	(unless (zerop (length port))
	  (setq host (concat host tramp-prefix-port-format port)))
	(with-parsed-tramp-file-name
	    (tramp-make-tramp-file-name method user host "") nil
	  (tramp-message
	   v 6 "%s %s"
	   signal-name (tramp-gvfs-stringify-dbus-message mount-info))
	  (tramp-set-file-property v "/" "list-mounts" 'undef)
	  (if (string-equal signal-name "unmounted")
	      (tramp-set-file-property v "/" "fuse-mountpoint" nil)
	    ;; Set prefix, mountpoint and location.
	    (unless (string-equal prefix "/")
	      (tramp-set-file-property v "/" "prefix" prefix))
	    (tramp-set-file-property v "/" "fuse-mountpoint" fuse-mountpoint)
	    (tramp-set-file-property
	     v "/" "default-location" default-location)))))))
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(dbus-register-signal
 :session nil tramp-gvfs-path-mounttracker
 tramp-gvfs-interface-mounttracker "mounted"
 'tramp-gvfs-handler-mounted-unmounted)

(dbus-register-signal
 :session nil tramp-gvfs-path-mounttracker
 tramp-gvfs-interface-mounttracker "unmounted"
 'tramp-gvfs-handler-mounted-unmounted)

(defun tramp-gvfs-connection-mounted-p (vec)
  "Check, whether the location is already mounted."
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  (or
   (tramp-get-file-property vec "/" "fuse-mountpoint" nil)
   (catch 'mounted
     (dolist
	 (elt
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	  (with-tramp-file-property vec "/" "list-mounts"
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	    (with-tramp-dbus-call-method vec t
	      :session tramp-gvfs-service-daemon tramp-gvfs-path-mounttracker
	      tramp-gvfs-interface-mounttracker "listMounts"))
	  nil)
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       ;; Jump over the first elements of the mount info. Since there
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       ;; were changes in the entries, we cannot access dedicated
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       ;; elements.
       (while (stringp (car elt)) (setq elt (cdr elt)))
       (let* ((fuse-mountpoint (dbus-byte-array-to-string (cadr elt)))
	      (mount-spec (caddr elt))
	      (default-location (dbus-byte-array-to-string (cadddr elt)))
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	      (method (dbus-byte-array-to-string
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		       (cadr (assoc "type" (cadr mount-spec)))))
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	      (user (dbus-byte-array-to-string
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		     (cadr (assoc "user" (cadr mount-spec)))))
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	      (domain (dbus-byte-array-to-string
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		       (cadr (assoc "domain" (cadr mount-spec)))))
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	      (host (dbus-byte-array-to-string
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		     (cadr (or (assoc "host" (cadr mount-spec))
			       (assoc "server" (cadr mount-spec))))))
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	      (port (dbus-byte-array-to-string
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		     (cadr (assoc "port" (cadr mount-spec)))))
	      (ssl (dbus-byte-array-to-string
		    (cadr (assoc "ssl" (cadr mount-spec)))))
	      (prefix (concat (dbus-byte-array-to-string (car mount-spec))
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			      (dbus-byte-array-to-string
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			       (cadr (assoc "share" (cadr mount-spec)))))))
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	 (when (string-match "^smb" method)
	   (setq method "smb"))
	 (when (string-equal "obex" method)
	   (setq host (tramp-bluez-device host)))
	 (when (and (string-equal "dav" method) (string-equal "true" ssl))
	   (setq method "davs"))
	 (when (and (string-equal "synce" method) (zerop (length user)))
	   (setq user (or (tramp-file-name-user vec) "")))
	 (unless (zerop (length domain))
	   (setq user (concat user tramp-prefix-domain-format domain)))
	 (unless (zerop (length port))
	   (setq host (concat host tramp-prefix-port-format port)))
	 (when (and
		(string-equal method (tramp-file-name-method vec))
		(string-equal user (or (tramp-file-name-user vec) ""))
		(string-equal host (tramp-file-name-host vec))
		(string-match (concat "^" (regexp-quote prefix))
			      (tramp-file-name-localname vec)))
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	   ;; Set prefix, mountpoint and location.
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	   (unless (string-equal prefix "/")
	     (tramp-set-file-property vec "/" "prefix" prefix))
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	   (tramp-set-file-property vec "/" "fuse-mountpoint" fuse-mountpoint)
	   (tramp-set-file-property vec "/" "default-location" default-location)
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	   (throw 'mounted t)))))))
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(defun tramp-gvfs-mount-spec (vec)
  "Return a mount-spec for \"org.gtk.vfs.MountTracker.mountLocation\"."
  (let* ((method (tramp-file-name-method vec))
	 (user (tramp-file-name-real-user vec))
	 (domain (tramp-file-name-domain vec))
	 (host (tramp-file-name-real-host vec))
	 (port (tramp-file-name-port vec))
	 (localname (tramp-file-name-localname vec))
	 (ssl (if (string-match "^davs" method) "true" "false"))
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	 (mount-spec '(:array))
	 (mount-pref "/"))
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    (setq
     mount-spec
     (append
      mount-spec
      (cond
       ((string-equal "smb" method)
	(string-match "^/?\\([^/]+\\)" localname)
	`((:struct "type" ,(dbus-string-to-byte-array "smb-share"))
	  (:struct "server" ,(dbus-string-to-byte-array host))
	  (:struct "share" ,(dbus-string-to-byte-array
			     (match-string 1 localname)))))
       ((string-equal "obex" method)
	`((:struct "type" ,(dbus-string-to-byte-array method))
	  (:struct "host" ,(dbus-string-to-byte-array
			    (concat "[" (tramp-bluez-address host) "]")))))
       ((string-match "^dav" method)
	`((:struct "type" ,(dbus-string-to-byte-array "dav"))
	  (:struct "host" ,(dbus-string-to-byte-array host))
	  (:struct "ssl" ,(dbus-string-to-byte-array ssl))))
       (t
	`((:struct "type" ,(dbus-string-to-byte-array method))
	  (:struct "host" ,(dbus-string-to-byte-array host)))))))

    (when user
      (add-to-list
       'mount-spec
       `(:struct "user" ,(dbus-string-to-byte-array user))
       'append))

    (when domain
      (add-to-list
       'mount-spec
       `(:struct "domain" ,(dbus-string-to-byte-array domain))
       'append))

    (when port
      (add-to-list
       'mount-spec
       `(:struct "port" ,(dbus-string-to-byte-array (number-to-string port)))
       'append))

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    (when (and (string-match "^dav" method)
	       (string-match "^/?[^/]+" localname))
      (setq mount-pref (match-string 0 localname)))

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    ;; Return.
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    `(:struct ,(dbus-string-to-byte-array mount-pref) ,mount-spec)))
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;; Connection functions

(defun tramp-gvfs-maybe-open-connection (vec)
  "Maybe open a connection VEC.
Does not do anything if a connection is already open, but re-opens the
connection if a previous connection has died for some reason."

  ;; We set the file name, in case there are incoming D-Bus signals or
  ;; D-Bus errors.
  (setq tramp-gvfs-dbus-event-vector vec)

  ;; For password handling, we need a process bound to the connection
  ;; buffer.  Therefore, we create a dummy process.  Maybe there is a
  ;; better solution?
  (unless (get-buffer-process (tramp-get-buffer vec))
    (let ((p (make-network-process
	      :name (tramp-buffer-name vec)
	      :buffer (tramp-get-buffer vec)
	      :server t :host 'local :service t)))
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      (tramp-compat-set-process-query-on-exit-flag p nil)))
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  (unless (tramp-gvfs-connection-mounted-p vec)
    (let* ((method (tramp-file-name-method vec))
	   (user (tramp-file-name-user vec))
	   (host (tramp-file-name-host vec))
	   (object-path
	    (tramp-gvfs-object-path
	     (tramp-make-tramp-file-name method user host ""))))

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      (with-tramp-progress-reporter
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	  vec 3
	  (if (zerop (length user))
	      (format "Opening connection for %s using %s" host method)
	    (format "Opening connection for %s@%s using %s" user host method))

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	;; Enable auth-source and password-cache.
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	(tramp-set-connection-property vec "first-password-request" t)

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	;; There will be a callback of "askPassword" when a password is
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	;; needed.
	(dbus-register-method
	 :session dbus-service-emacs object-path
	 tramp-gvfs-interface-mountoperation "askPassword"
	 'tramp-gvfs-handler-askpassword)

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	;; There could be a callback of "askQuestion" when adding fingerprint.
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	(dbus-register-method
	 :session dbus-service-emacs object-path
	 tramp-gvfs-interface-mountoperation "askQuestion"
	 'tramp-gvfs-handler-askquestion)

	;; The call must be asynchronously, because of the "askPassword"
	;; or "askQuestion"callbacks.
	(with-tramp-dbus-call-method vec nil
	  :session tramp-gvfs-service-daemon tramp-gvfs-path-mounttracker
	  tramp-gvfs-interface-mounttracker "mountLocation"
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	  (tramp-gvfs-mount-spec vec) (dbus-get-unique-name :session)
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	  :object-path object-path)

	;; We must wait, until the mount is applied.  This will be
	;; indicated by the "mounted" signal, i.e. the "fuse-mountpoint"
	;; file property.
	(with-timeout
	    (60
	     (if (zerop (length (tramp-file-name-user vec)))
		 (tramp-error
		  vec 'file-error
		  "Timeout reached mounting %s using %s" host method)
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	       (tramp-error
		vec 'file-error
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		"Timeout reached mounting %s@%s using %s" user host method)))
	  (while (not (tramp-get-file-property vec "/" "fuse-mountpoint" nil))
	    (read-event nil nil 0.1)))

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	;; If `tramp-gvfs-handler-askquestion' has returned "No", it
	;; is marked with the fuse-mountpoint "/".  We shall react.
	(when (string-equal
	       (tramp-get-file-property vec "/" "fuse-mountpoint" "") "/")
	  (tramp-error vec 'file-error "FUSE mount denied"))

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	;; We set the connection property "started" in order to put the
	;; remote location into the cache, which is helpful for further
	;; completion.
	(tramp-set-connection-property vec "started" t)))))
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(defun tramp-gvfs-send-command (vec command &rest args)
  "Send the COMMAND with its ARGS to connection VEC.
COMMAND is usually a command from the gvfs-* utilities.
`call-process' is applied, and its return code is returned."
  (let (result)
    (with-current-buffer (tramp-get-buffer vec)
      (erase-buffer)
      (tramp-message vec 6 "%s %s" command (mapconcat 'identity args " "))
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      (setq result (apply 'tramp-compat-call-process command nil t nil args))
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      (tramp-message vec 6 "%s" (buffer-string))
      result)))

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;; D-Bus BLUEZ functions.

(defun tramp-bluez-list-devices ()
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  "Return all discovered bluetooth devices as list.
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