ares_getsock(3) [centos man page]

ARES_GETSOCK(3) 					     Library Functions Manual						   ARES_GETSOCK(3)

NAME

       ares_getsock - get socket descriptors to wait on

SYNOPSIS

       #include <ares.h>

       int ares_getsock(ares_channel channel, ares_socket_t *socks,
       int numsocks);

DESCRIPTION

       The  ares_getsock  function retrieves the set of socket descriptors which the calling application should wait on for reading and/or writing
       for the processing of name service queries pending on the name service channel identified by channel.  Socket descriptors will  be  set	in
       the socket descriptor array pointed to by socks.  numsocks is the size of the given array in number of ints.

       This  function  can  only  return  information  about  up to 16 sockets. If more are in use (however unlikely that is), they are simply not
       reported back.

RETURN VALUES

       ares_getsock returns a bitmask for what actions to wait for on the different sockets. The ares.h header	file  provides	these  convenience
       macros to extract the information appropriately:

       #define ARES_GETSOCK_MAXNUM 16 /* ares_getsock() can return info about
					 this many sockets */
       #define ARES_GETSOCK_READABLE(bits,num) (bits & (1<< (num)))
       #define ARES_GETSOCK_WRITABLE(bits,num) (bits & (1 << ((num) +					       ARES_GETSOCK_MAXNUM)))

NOTES

       This function was added in c-ares 1.3.1

SEE ALSO

       ares_timeout(3), ares_fds(3), ares_process(3)

								   11 March 2010						   ARES_GETSOCK(3)

ARES_SAVE_OPTIONS(3)					     Library Functions Manual					      ARES_SAVE_OPTIONS(3)

NAME

       ares_save_options - Save configuration values obtained from initialized ares_channel

SYNOPSIS

       #include <ares.h>

       int ares_save_options(ares_channel channel, struct ares_options *options, int *optmask)

DESCRIPTION

       The  ares_save_options(3)  function  saves the channel data identified by channel, into the options struct identified by options, and saves
       the mask of options which are set to the integer pointer (passed by reference) identified by optmask.

       The resultant options and optmask are then able to be passed directly to  ares_init_options.   When  the  options  are  no  longer  needed,
       ares_destroy_options should be called to free any associated memory.

RETURN VALUES

       ares_save_options(3) can return any of the following values:

       ARES_SUCCESS   The channel data was successfuly stored

       ARES_ENOMEM    The memory was exhausted

       ARES_ENODATA   The channel data identified by channel were invalid.

NOTE

       Since  c-ares  1.6.0 the ares_options struct has been "locked" meaning that it won't be extended to cover new functions. This function will
       remain functioning, but it can only return config data that can be represented in this config struct, which may no longer be  the  complete
       set of config options. ares_dup(3) will not have that restriction.

       The  ares_options  struct  can not handle potential IPv6 name servers the ares_channel might be configured to use. The ares_save_options(3)
       function will only  return  IPv4  servers,  if  any.  In  order	to  retrieve  all  name  servers  an  ares_channel  might  be  using,  the
       ares_get_servers(3) function must be used instead.

SEE ALSO

       ares_destroy_options(3), ares_init_options(3), ares_get_servers(3), ares_dup(3)

AVAILABILITY

       ares_save_options(3) was added in c-ares 1.4.0

AUTHOR

       Brad House
       Copyright 1998 by the Massachusetts Institute of Technology.

								   5 March 2010 					      ARES_SAVE_OPTIONS(3)