How to use hal methods to mount,umount volume?

[zhihuaye]

I want to use dbus-send to send a method to umount the usb volume.
However,the error is shown below:

dbus-send --system --print-reply --dest=org.freedesktop.Hal /org/freedesktop/Hal/devices/volume_uuid_4409_6AFB org.freedesktop.Hal.Device.Volume.Unmount 
Error   org.freedesktop.DBus.Error.UnknownMethod: Method "UnMount" with signature "" on interface "org.freedesktop.Hal.Device.Volume" doesn't exist

I use "lshal" to see the hal info:
udi = '/org/freedesktop/Hal/devices/volume_uuid_4409_6AFB'
  volume.unmount.valid_options = {'lazy'} (string list)
  volume.mount.valid_options = {'ro', 'sync', 'dirsync', 'noatime', 'nodiratime', 'noexec', 'quiet', 'remount', 'exec', 'utf8', 'sho
rtname=', 'codepage=', 'iocharset=', 'umask=', 'dmask=', 'fmask=', 'uid='} (string list)
  org.freedesktop.Hal.Device.Volume.method_execpaths = {'hal-storage-mount', 'hal-storage-unmount', 'hal-storage-eject'} (string lis
t)
  org.freedesktop.Hal.Device.Volume.method_argnames = {'mount_point fstype extra_options', 'extra_options', 'extra_options'} (string
 list)
  org.freedesktop.Hal.Device.Volume.method_signatures = {'ssas', 'as', 'as'} (string list)
  org.freedesktop.Hal.Device.Volume.method_names = {'Mount', 'Unmount', 'Eject'} (string list)
  info.interfaces = {'org.freedesktop.Hal.Device.Volume'} (string list)
  volume.ignore = false  (bool)
  info.udi = '/org/freedesktop/Hal/devices/volume_uuid_4409_6AFB'  (string)
..........


As you can see,the Unmount method is right there.
How can I solve it?
Thanks!





zhihuaye
2008-06-05
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