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CentOS 7.0 - man page for ares_get_servers (centos section 3)

ARES_GET_SERVERS(3)		     Library Functions Manual		      ARES_GET_SERVERS(3)

       ares_get_servers - Retrieve name servers from an initialized ares_channel

       #include <ares.h>

       int ares_get_servers(ares_channel channel, struct ares_addr_node **servers)

       The  ares_get_servers(3)  function  retrieves  name servers configuration from the channel
       data identified by channel, as a linked list of ares_addr_node structs storing  a  pointer
       to the first node at the address specified by servers.

       Function  caller may traverse the returned name server linked list, or may use it directly
       as suitable input for the ares_set_servers(3) function, but shall not shrink or extend the
       list on its own.

       Each  node  of  the  name server linked list is stored in memory dynamically allocated and
       managed by c-ares. It is the caller's responsibility to free the  resulting  linked  list,
       using ares_free_data(3) , once the caller does not need it any longer.

       This  function  is capable of handling IPv4 and IPv6 name server addresses simultaneously,
       rendering ares_save_options(3) with optmask ARES_OPT_SERVERS functionally obsolete  except
       for IPv4-only name server usage.

       ares_get_servers(3) may return any of the following values:

       ARES_SUCCESS   The name servers configuration was successfuly retrieved

       ARES_ENOMEM    The memory was exhausted

       ARES_ENODATA   The channel data identified by channel was invalid.

       ares_set_servers(3), ares_init_options(3), ares_save_options(3)

       ares_get_servers(3) was added in c-ares 1.7.1

       Implementation  of  this function and associated library internals are based on code, com-
       ments and feedback provided in November and December of 2008 by	Daniel	Stenberg,  Gregor
       Jasny,  Phil  Blundell  and Yang Tse, December 2009 by Cedric Bail, February 2010 by Jakub
       Hrozek. On March 2010 Yang Tse shuffled all the bits and this function popped out.
       Copyright 1998 by the Massachusetts Institute of Technology.
       Copyright (C) 2008-2010 by Daniel Stenberg

					   5 March 2010 		      ARES_GET_SERVERS(3)

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