/*******************************************************************
like select() but avoids the signal race using a pipe
/*******************************************************************
like select() but avoids the signal race using a pipe
for file descriptors that were readable
********************************************************************/
int sys_select(int maxfd, fd_set *fds,struct timeval *tval)
for file descriptors that were readable
********************************************************************/
int sys_select(int maxfd, fd_set *fds,struct timeval *tval)