1  #define IOPOLL_BROKEN_OUTPUT -2
       2  #define IOPOLL_ERROR         -3
       3  
       4  int iopoll (int fdin, int fdout, bool block);
       5  bool iopoll_input_ok (int fdin);
       6  bool iopoll_output_ok (int fdout);
       7  
       8  bool fclose_wait (FILE *f);
       9  bool fwrite_wait (char const *buf, ssize_t size, FILE *f);