NAME

       ares_fds - return file descriptors to select on

SYNOPSIS

       #include <ares.h>

       int ares_fds(ares_channel channel,
                    fd_set *read_fds,
                 fd_set *write_fds)

DESCRIPTION

       The  ares_fds(3)  function  retrieves  the  set  of  file  descriptors  which  the calling
       application should select on for reading and writing for the processing  of  name  service
       queries pending on the name service channel identified by channel.

       File  descriptors  will  be  set  in  the  file descriptor sets pointed to by read_fds and
       write_fds as appropriate.  File descriptors already set in  read_fds  and  write_fds  will
       remain   set;   initialization  of  the  file  descriptor  sets  (using  FD_ZERO)  is  the
       responsibility of the caller.

RETURN VALUES

       ares_fds(3) returns a value that is one greater than the number of the highest socket  set
       in either read_fds or write_fds.  If no queries are active, ares_fds(3) returns 0.

SEE ALSO

       ares_timeout(3), ares_process(3)

AUTHOR

       Greg Hudson, MIT Information Systems
       Copyright 1998 by the Massachusetts Institute of Technology.

                                           23 July 1998                               ARES_FDS(3)