* select.cc (peek_pipe): Reorganize slightly. Don't attempt to check a handle if it has ongoing I/O. (select_pipe_info::select_pipe_info): Delete definition. (select_pipe_info::~select_pipe_info): Delete definition. (thread_pipe): Get rid of WFMO call. Reorganize loop. (pipe_cleanup): Remove dependence on destructor. (thread_serial): Reorganize loop. * select.h (select_pipe_info): Empty this class since it no longer has any special requirements (for now). * syscalls.cc (readv): Remove an unneeded debug printf.