I am compiling the list of functions in libroot.so. a modified libc appears to have been used to compile this library so I think we are on the right track with newos libc . One thing I do notice are implementations of ioctl, fcntl, and fork. Do these not work correctly for BeOS? My information was that they were completely missing. Perhaps they are holdovers from using opensource libc versions. Anyway, is there a more comprehensive list of the functions contained in libroot somewhere. I think I have them all but I also need descriptions of what they are for return variables, arguments, etc. The standard stuff isn't a problem. It's the stuff that is specific to the internals of BeOS that I need a proper list of. I want to make sure I get everything covered. Peter