[PD] an object which make pd to terminate ?

[Jerome Etienne]

hello crowd,
im trying to automatize some pd processing via script. 
The script luanch puredata which does some processing
and i would like to have pd to quit when the processing
is completed.

1. is there an object which tell pd to quit when it receive
   a bang, for example ?
2. if there is not, currently im considering a solution in
   which a script wait for some output (via print or netsend)
   to kill pd's process, it is rather dirty according to me.
   is there a better way to do it ?