Hi, i use libsdp without problems. LD_PRELOAD stuff works fine, great work! but i have question: Why is there this libsdp_sys on my system? Its build from socket.c For what did i need this lib? AFAIK after i set LD_PRELOAD to libsdp.so, my application will use the socket() function from port.c, why another socket() function in another lib? regards, Joerg