heheh.. sorry for that 2 lines of include. it was because i'm the 'other' O.S. and I was making changes to make the code identical to the plan9 code, i've forgoten to chance the #includeS lines. Ok, the qsort is more faster, but i'm seeing something about that kind of data structure... I've read in 9.intro about the libbio and about bufering output is better, but when i've tested the program with time, i did coment the call pbst line.