* net/tramp-gvfs.el: New package.

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+;;; tramp-gvfs.el --- Tramp access functions for GVFS daemon
+
+;; Copyright (C) 2009 Free Software Foundation, Inc.
+
+;; Author: Michael Albinus <[email protected]>
+;; Keywords: comm, processes
+
+;; This file is free software: you can redistribute it and/or modify
+;; it under the terms of the GNU General Public License as published by
+;; the Free Software Foundation, either version 3 of the License, or
+;; (at your option) any later version.
+
+;; This file is distributed in the hope that it will be useful, but
+;; WITHOUT ANY WARRANTY; without even the implied warranty of
+;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+;; General Public License for more details.
+
+;; You should have received a copy of the GNU General Public License
+;; along with GNU Emacs.  If not, see <http://www.gnu.org/licenses/>.
+
+;;; Commentary:
+
+;; Access functions for the GVFS daemon from Tramp.  Tested with GVFS
+;; 1.0.2 (Ubuntu 8.10, Gnome 2.24).
+
+;; 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.
+;; Consequently, GNU Emacs 23.0.90 with enabled D-Bus bindings is a
+;; precondition.
+
+;; The GVFS D-Bus interface is said to be instable.  There are even no
+;; introspection data.  The interface, as discovered during
+;; development time, is given in respective comments.
+
+;; The customer option `tramp-gvfs-methods' contains the list of
+;; supported connection methods.  Per default, these are "dav", "davs"
+;; and "obex".  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.
+
+;; 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
+;; bluez daemon (for the "obex" 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.
+
+;; 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-call-method "dbusbind.c")
+(declare-function dbus-call-method-asynchronously "dbusbind.c")
+(declare-function dbus-get-unique-name "dbusbind.c")
+(declare-function dbus-register-method "dbusbind.c")
+(declare-function dbus-register-signal "dbusbind.c")
+
+;; Pacify byte-compiler
+(eval-when-compile
+  (require 'cl)
+  (require 'custom))
+
+(require 'tramp)
+(require 'dbus)
+(require 'url-parse)
+(require 'zeroconf)
+
+(defcustom tramp-gvfs-methods '("dav" "davs" "obex")
+  "*List of methods for remote files, accessed with GVFS."
+  :group 'tramp
+  :type '(repeat (choice (const "dav")
+			 (const "davs")
+			 (const "ftp")
+			 (const "obex")
+			 (const "sftp")
+			 (const "smb"))))
+
+(defcustom tramp-gvfs-zeroconf-domain "local"
+  "*Zeroconf domain to be used for discovering services, like host names."
+  :group 'tramp
+  :type 'string)
+
+;; Add the methods to `tramp-methods', in order to allow minibuffer
+;; completion.
+(eval-after-load "tramp-gvfs"
+  '(when (featurep 'tramp-gvfs)
+     (dolist (elt tramp-gvfs-methods)
+       (unless (assoc elt tramp-methods)
+	 (add-to-list 'tramp-methods (cons elt nil))))))
+
+(defconst tramp-gvfs-mount-point
+  (file-name-as-directory (expand-file-name ".gvfs" "~/"))
+  "The directory name, fuses mounts remote ressources.")
+
+(defconst tramp-gvfs-path-tramp (concat dbus-path-emacs "/Tramp")
+  "The preceeding object path for own objects.")
+
+(defconst tramp-gvfs-service-daemon "org.gtk.vfs.Daemon"
+  "The well known name of the GVFS daemon.")
+
+;; Check that GVFS is available.
+(unless (dbus-ping :session tramp-gvfs-service-daemon)
+  (message "GVFS daemon not running")
+  (throw 'tramp-loading nil))
+
+(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'
+;;          type='a{sosssssbay{aya{say}}}'
+;;          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'
+;;          type='{sosssssbay{aya{say}}}'/>
+;;   </signal>
+;;   <signal name='unmounted'>
+;;     <arg name='mount_info'
+;;          type='{sosssssbay{aya{say}}}'/>
+;;   </signal>
+;; </interface>
+;;
+;; STRUCT		mount_info
+;;   STRING		  dbus_id
+;;   OBJECT_PATH	  object_path
+;;   STRING		  display_name
+;;   STRING		  stable_name
+;;   STRING		  x_content_types
+;;   STRING		  icon
+;;   STRING		  prefered_filename_encoding
+;;   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
+
+(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'>
+;;     <arg name='message' type='s'  direction='in'/>
+;;     <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
+  :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).")
+
+;; 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)
+    ;; `byte-compiler-base-file-name' performed by default handler
+    (copy-file . tramp-gvfs-handle-copy-file)
+    (delete-directory . tramp-gvfs-handle-delete-directory)
+    (delete-file . tramp-gvfs-handle-delete-file)
+    ;; `diff-latest-backup-file' performed by default handler
+    (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)
+    (expand-file-name . tramp-gvfs-handle-expand-file-name)
+    ;; `file-accessible-directory-p' performed by default handler
+    (file-attributes . tramp-gvfs-handle-file-attributes)
+    (file-directory-p . tramp-smb-handle-file-directory-p)
+    (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)
+    (file-remote-p . tramp-handle-file-remote-p)
+    ;; `file-modes' performed by default handler
+    (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)
+    ;; `file-name-sans-versions' performed by default handler
+    (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)
+    (file-symlink-p . tramp-handle-file-symlink-p)
+    ;; `file-truename' performed by default handler
+    (file-writable-p . tramp-gvfs-handle-file-writable-p)
+    (find-backup-file-name . tramp-handle-find-backup-file-name)
+    ;; `find-file-noselect' performed by default handler
+    ;; `get-file-buffer' performed by default handler
+    (insert-directory . tramp-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)
+    (rename-file . tramp-gvfs-handle-rename-file)
+    (set-file-modes . tramp-gvfs-handle-set-file-modes)
+    (set-visited-file-modtime . tramp-gvfs-handle-set-visited-file-modtime)
+    (shell-command . ignore)
+    (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.")
+
+(defun tramp-gvfs-file-name-p (filename)
+  "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)))))
+
+(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.
+(add-to-list 'tramp-foreign-file-name-handler-alist
+	     (cons 'tramp-gvfs-file-name-p 'tramp-gvfs-file-name-handler))
+
+(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))
+     (tramp-message ,vec 6 "\n%s" result)
+     result))
+
+(put 'with-tramp-dbus-call-method 'lisp-indent-function 2)
+(put 'with-tramp-dbus-call-method 'edebug-form-spec '(form symbolp body))
+(font-lock-add-keywords 'emacs-lisp-mode '("\\<with-tramp-dbus-call-method\\>"))
+
+(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
+	 (apply ,handler (list ,@args))
+       (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))
+(font-lock-add-keywords 'emacs-lisp-mode '("\\<with-tramp-gvfs-error-message\\>"))
+
+(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)
+  "Called when a D-Bus error message arrives, see `dbus-event-error-hooks'."
+;  (tramp-cleanup-connection tramp-gvfs-dbus-event-vector)
+  (tramp-message tramp-gvfs-dbus-event-vector 1 "%S" event)
+  (tramp-error tramp-gvfs-dbus-event-vector 'file-error "%s" (cadr err)))
+
+(add-hook 'dbus-event-error-hooks 'tramp-gvfs-dbus-event-error)
+
+
+;; File name primitives.
+
+(defun tramp-gvfs-handle-copy-file
+  (filename newname &optional ok-if-already-exists keep-date preserve-uid-gid)
+  "Like `copy-file' for Tramp files."
+  (copy-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 keep-date preserve-uid-gid))
+
+(defun tramp-gvfs-handle-delete-directory (directory)
+  "Like `delete-directory' for Tramp files."
+  (delete-directory (tramp-gvfs-fuse-file-name directory)))
+
+(defun tramp-gvfs-handle-delete-file (filename)
+  "Like `delete-file' for Tramp files."
+  (delete-file (tramp-gvfs-fuse-file-name filename)))
+
+(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
+      ;; 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))))))
+
+(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))
+
+(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)))
+
+(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."
+  (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
+     (with-parsed-tramp-file-name filename nil
+       (tramp-message v 4 "`make-directory' failed, trying `gvfs-mkdir'")
+       (unless
+	   (zerop
+	    (tramp-local-call-process
+	     "gvfs-mkdir" nil (tramp-get-buffer v) nil
+	     (tramp-gvfs-url-file-name filename)))
+	 (signal (car err) (cdr err)))))))
+
+(defun tramp-gvfs-handle-rename-file
+  (filename newname &optional ok-if-already-exists)
+  "Like `rename-file' for Tramp files."
+  (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))
+
+(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))
+
+(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)))
+
+(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)
+
+      ;; Error case.  Let's try it with the GVFS utilities.
+      (error
+       (let ((tmpfile (tramp-compat-make-temp-file filename)))
+	 (tramp-message v 4 "`write-region' failed, trying `gvfs-save'")
+	 (write-region start end tmpfile)
+	 (unwind-protect
+	     (unless
+		 (zerop
+		  (tramp-local-call-process
+		   "gvfs-save" tmpfile (tramp-get-buffer v) nil
+		   (tramp-gvfs-url-file-name filename)))
+	       (signal (car err) (cdr err)))
+	   (delete-file tmpfile)))))
+
+    ;; 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."
+  (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) localname))
+     (url-parse-make-urlobj "file" nil nil nil nil (file-truename filename)))))
+
+(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)
+    (let ((fuse-mountpoint
+	   (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))
+      ;; We must remove the share from the local name.
+      (when (and (string-equal "smb" method) (string-match "/[^/]+" localname))
+	(setq localname (replace-match "" t t localname)))
+      (concat tramp-gvfs-mount-point fuse-mountpoint localname))))
+
+(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
+	      (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))
+
+	    ;; When the choice is "no", we set an empty
+	    ;; fuse-mountpoint in order to leave the timeout.
+	    (unless (zerop choice)
+	      (tramp-set-file-property v "/" "fuse-mountpoint" ""))
+
+	    (list
+	     t ;; handled.
+	     nil ;; no abort of D-Bus.
+	     choice))
+
+	  ;; When QUIT is raised, we shall return this information to D-Bus.
+	  (quit (list nil t 0))))))
+
+(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
+    (let* ((signal-name (dbus-event-member-name last-input-event))
+	   (mount-spec (nth 1 (nth 9 mount-info)))
+	   (method (dbus-byte-array-to-string (cadr (assoc "type" mount-spec))))
+	   (user (dbus-byte-array-to-string (cadr (assoc "user" mount-spec))))
+	   (domain (dbus-byte-array-to-string
+		    (cadr (assoc "domain" mount-spec))))
+	   (host (dbus-byte-array-to-string
+		  (cadr (or (assoc "host" mount-spec)
+			    (assoc "server" mount-spec)))))
+	   (port (dbus-byte-array-to-string (cadr (assoc "port" mount-spec))))
+	   (ssl (dbus-byte-array-to-string (cadr (assoc "ssl" 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 mount-info)
+	(tramp-set-file-property v "/" "list-mounts" 'undef)
+	(if (string-equal signal-name "unmounted")
+	    (tramp-set-file-property v "/" "fuse-mountpoint" nil)
+	  (tramp-set-file-property
+	   v "/" "fuse-mountpoint"
+	   (file-name-nondirectory
+	    (dbus-byte-array-to-string (nth 8 mount-info)))))))))
+
+(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."
+  (catch 'mounted
+    (dolist
+	(elt
+	 (with-file-property vec "/" "list-mounts"
+	   (with-tramp-dbus-call-method vec t
+	     :session tramp-gvfs-service-daemon tramp-gvfs-path-mounttracker
+	     tramp-gvfs-interface-mounttracker "listMounts"))
+	 nil)
+      (let* ((mount-spec (nth 1 (nth 9 elt)))
+	     (method (dbus-byte-array-to-string
+		      (cadr (assoc "type" mount-spec))))
+	     (user (dbus-byte-array-to-string
+		    (cadr (assoc "user" mount-spec))))
+	     (domain (dbus-byte-array-to-string
+		      (cadr (assoc "domain" mount-spec))))
+	     (host (dbus-byte-array-to-string
+		    (cadr (or (assoc "host" mount-spec)
+			      (assoc "server" mount-spec)))))
+	     (port (dbus-byte-array-to-string (cadr (assoc "port" mount-spec))))
+	     (ssl (dbus-byte-array-to-string (cadr (assoc "ssl" 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)))
+	(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)))
+	  (tramp-set-file-property
+	   vec "/" "fuse-mountpoint"
+	   (file-name-nondirectory (dbus-byte-array-to-string (nth 8 elt))))
+	  (throw 'mounted t))))))
+
+(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"))
+	 (mount-spec `(:array)))
+
+    (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))
+
+    ;; Return.
+    mount-spec))
+
+
+;; 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)))
+      (tramp-set-process-query-on-exit-flag p nil)))
+
+  (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 ""))))
+
+      (if (zerop (length (tramp-file-name-user vec)))
+	  (tramp-message
+	   vec 3 "Opening connection for %s using %s..." host method)
+	(tramp-message
+	 vec 3 "Opening connection for %s@%s using %s..." user host method))
+
+      ;; Enable auth-sorce and password-cache.
+      (tramp-set-connection-property
+       (tramp-get-connection-process vec) "first-password-request" t)
+
+      ;; There will be a callback of "askPassword", when a password is
+      ;; needed.
+      (dbus-register-method
+       :session dbus-service-emacs object-path
+       tramp-gvfs-interface-mountoperation "askPassword"
+       'tramp-gvfs-handler-askpassword)
+
+      ;; There could be a callback of "askQuestion", when adding fingerprint.
+      (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"
+	`(:struct
+	  ,(dbus-string-to-byte-array "/")
+	  ,(tramp-gvfs-mount-spec vec))
+	(dbus-get-unique-name :session)
+	: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)
+	     (tramp-error
+	      vec 'file-error
+	      "Timeout reached mounting %s@%s using %s" user host method)))
+	(while (not (tramp-get-file-property vec "/" "fuse-mountpoint" nil))
+	  (sit-for 0.1)))
+
+      ;; 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)
+
+      (if (zerop (length (tramp-file-name-user vec)))
+	  (tramp-message
+	   vec 3 "Opening connection for %s using %s...done" host method)
+	(tramp-message
+	 vec 3
+	 "Opening connection for %s@%s using %s...done" user host method)))))
+
+
+;; D-Bus BLUEZ functions.
+
+(defun tramp-bluez-list-devices ()
+  "Returns all discovered bluetooth devices as list.
+Every entry is a list (NAME ADDRESS).
+
+If `tramp-bluez-discover-devices-timeout' is an integer, and the last
+discovery happened more time before indicated there, a rescan will be
+started, which lasts some ten seconds.  Otherwise, cached results will
+be used."
+  ;; Reset the scanned devices list if time has passed.
+  (and (integerp tramp-bluez-discover-devices-timeout)
+       (integerp tramp-bluez-discovery)
+       (> (tramp-time-diff (current-time) tramp-bluez-discovery)
+	  tramp-bluez-discover-devices-timeout)
+       (setq tramp-bluez-devices nil))
+
+  ;; Rescan if needed.
+  (unless tramp-bluez-devices
+    (let ((object-path
+	   (with-tramp-dbus-call-method tramp-gvfs-dbus-event-vector t
+	     :system tramp-bluez-service "/"
+	     tramp-bluez-interface-manager "DefaultAdapter")))
+      (setq tramp-bluez-devices nil
+	    tramp-bluez-discovery t)
+      (with-tramp-dbus-call-method tramp-gvfs-dbus-event-vector nil
+	:system tramp-bluez-service object-path
+	tramp-bluez-interface-adapter "StartDiscovery")
+      (while tramp-bluez-discovery
+	(read-event nil nil 0.1))))
+  (setq tramp-bluez-discovery (current-time))
+  (tramp-message tramp-gvfs-dbus-event-vector 10 "%s" tramp-bluez-devices)
+  tramp-bluez-devices)
+
+(defun tramp-bluez-property-changed (property value)
+  "Signal handler for the \"org.bluez.Adapter.PropertyChanged\" signal."
+  (tramp-message tramp-gvfs-dbus-event-vector 6 "%s %s" property value)
+  (cond
+   ((string-equal property "Discovering")
+    (unless (car value)
+      ;; "Discovering" FALSE means discovery run has been completed.
+      ;; We stop it, because we don't need another run.
+      (setq tramp-bluez-discovery nil)
+      (with-tramp-dbus-call-method tramp-gvfs-dbus-event-vector t
+	:system tramp-bluez-service (dbus-event-path-name last-input-event)
+	tramp-bluez-interface-adapter "StopDiscovery")))))
+
+(dbus-register-signal
+ :system nil nil tramp-bluez-interface-adapter "PropertyChanged"
+ 'tramp-bluez-property-changed)
+
+(defun tramp-bluez-device-found (device args)
+  "Signal handler for the \"org.bluez.Adapter.DeviceFound\" signal."
+  (tramp-message tramp-gvfs-dbus-event-vector 6 "%s %s" device args)
+  (let ((alias (car (cadr (assoc "Alias" args))))
+	(address (car (cadr (assoc "Address" args)))))
+    ;; Maybe we shall check the device class for being a proper
+    ;; device, and call also SDP in order to find the obex service.
+    (add-to-list 'tramp-bluez-devices (list alias address))))
+
+(dbus-register-signal
+ :system nil nil tramp-bluez-interface-adapter "DeviceFound"
+ 'tramp-bluez-device-found)
+
+(defun tramp-bluez-parse-device-names (ignore)
+  "Return a list of (nil host) tuples allowed to access."
+  (mapcar
+   (lambda (x) (list nil (car x)))
+   (tramp-bluez-list-devices)))
+
+;; Add completion function for OBEX method.
+(when (dbus-ping :system tramp-bluez-service)
+  (tramp-set-completion-function
+   "obex" '((tramp-bluez-parse-device-names ""))))
+
+
+;; D-Bus zeroconf functions.
+
+(defun tramp-zeroconf-parse-workstation-device-names (ignore)
+  "Return a list of (user host) tuples allowed to access."
+  (mapcar
+   (lambda (x)
+     (list nil (zeroconf-service-host x)))
+   (zeroconf-list-services "_workstation._tcp")))
+
+(defun tramp-zeroconf-parse-webdav-device-names (ignore)
+  "Return a list of (user host) tuples allowed to access."
+  (mapcar
+   (lambda (x)
+     (let ((host (zeroconf-service-host x))
+	   (port (zeroconf-service-port x))
+	   (text (zeroconf-service-txt x))
+	   user)
+       (when port
+	 (setq host (format "%s%s%d" host tramp-prefix-port-regexp port)))
+       ;; A user is marked in a TXT field like "u=guest".
+       (while text
+	 (when (string-match "u=\\(.+\\)$" (car text))
+	   (setq user (match-string 1 (car text))))
+	 (setq text (cdr text)))
+       (list user host)))
+   (zeroconf-list-services "_webdav._tcp")))
+
+;; Add completion function for DAV and DAVS methods.
+(when (dbus-ping :system zeroconf-service-avahi)
+  (zeroconf-init tramp-gvfs-zeroconf-domain)
+  (tramp-set-completion-function
+   "sftp" '((tramp-zeroconf-parse-workstation-device-names "")))
+  (tramp-set-completion-function
+   "dav" '((tramp-zeroconf-parse-webdav-device-names "")))
+  (tramp-set-completion-function
+   "davs" '((tramp-zeroconf-parse-webdav-device-names ""))))
+
+(provide 'tramp-gvfs)
+
+;;; TODO:
+
+;; * process-file and start-file-process on the local machine, but
+;;   with remote files.
+;; * Host name completion via smb-server or smb-network.
+;; * Check, how two shares of the same SMB server can be mounted in
+;;   parallel.
+;; * Apply SDP on bluetooth devices, in order to filter out obex
+;;   capability.
+;; * Implement obex for other serial communication but bluetooth.
+
+;;; tramp-gvfs.el ends here