konsole: "there can be only one"

BalaclavaBoB · 09-07-2003, 11:53 AM

Hello, (Hope my Highlander quote is correct...

)

I'd like to make a script (will be executed from the K bar) which checks whether konsole is already running, if it is it creates a new tab using:

dcop `dcop|grep konsole|head -n 1` default newSession

(I'd like to thank 'grepper' from irc for this)

otherwise it opens a new konsole.
I don't know how to use what grep returns if it doesn't find anything.

Thanks,
Balalclava BoB

nhs · 09-07-2003, 01:07 PM

Try

dcop | grep konsole && dcop `dcop|grep konsole|head -n 1` default newSession || konsole &

&& means execute next command if last command successful (returned 0)
|| means execute next command if last command unsuccessful (returned nonzero)

grep returns 0 if it finds the string anywhere however returns nonzero if it couldn't find the string. It was therefore possible to build up an if..then..else type construct. (note: || then && doesn't work)