Popup needed while reboot - for confirmation

Hi all,

   I need something like a pop-up while clicking on shutdown button or reboot button in GUI and also while running the command reboot / shutdown / init it should ask some confirmation message[it can be just a message in terminal itself - No need of popup].. Do you want to do so..and so.

  How can i make this possible ?

.

What's your system?

Oh.. yea. I forgot it. sorry.

It is KDE version of Fedora.

root ~# rpm -qa Gives
fedora-release-15-3.noarch

root ~# uname -a
Linux Desktop 2.6.40.3-0.fc15.i686 #1 SMP Tue Aug 16 04:24:09 UTC 2011 i686 i686 i386 GNU/Linux

Do want any other details..?

is there anyone having any idea on this..?

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