ares_fds(3)

ARES_FDS(3)            C LIBRARY FUNCTIONS            ARES_FDS(3)

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  descrip-
     tors  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.

                    Last change: 23 July 1998                   1