Hi, Getting u9fs to compile under CYGWIN and its adged posix interface I needed a four of shims functions: ssize_t pread(int fd, void *p, size_t n, off_t off); ssize_t pwrite(int fd, const void *p, size_t n, off_t off); int setreuid(int ruid, int euid); int setregid(int rgid, int egid); Just in case this is usefull to somone else it is here attached. -Steve