also sprach Matt Brubeck <[EMAIL PROTECTED]> [2004.12.13.2332 +0100]:
> One small downside to this idea is that it is not the expected behavior
> for a user who already has an xterm open and types 'yadex' into it.

So use stty to check whether a tty is already attached. And also
check $DISPLAY to ensure that noone fires it up from a VC.

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 .''`.     martin f. krafft <[EMAIL PROTECTED]>
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