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awiebe
Asked: 2012-02-03 12:41:29 +0800 CST

Why can ubuntu perform a shutdown from the GUI even though it is prive on the command line? [duplicate]

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Possible Duplicate:
Difference between menu shutdown and 'shutdown -h now'

Why can ubuntu perform a shutdown from the GUI even though it is prive on the command line? By what mechanism does it do so?

gnome shutdown unprivileged

1 Answers

  1. The mechanism seems to be a DBus message, sent to a process with root privileges. Taken from How can I make shutdown not require admin password?:

    Shutdown:

    dbus-send --system --print-reply --dest=org.freedesktop.Hal \
          /org/freedesktop/Hal/devices/computer \
          org.freedesktop.Hal.Device.SystemPowerManagement.Shutdown
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