okok, I correct myself: For my special purpose(s) filelocking wasn't necessary. Everybody who wants to write serious counter-applications (not just for fun) should lock his/her files and make backups every now and then..

octopus
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GED/CC d-- s:- a--- C++(+++) UL+++ P++++$ L++>++++ E--- W+++@ N o? K? w-- O- M-(+) V? !PS !PE !Y PGP+(++) t-- 5 X+ R+(+++) tv+(++) b++@ DI+() D+ G++ e->+++ h!++ r+(++) y+