ares_fds - Get file descriptors to select on for name service
int ares_fds(ares_channel channel, fd_set *read_fds,
The ares_fds 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.
ares_fds returns one greater than the number of the highest socket set
in either read_fds or write_fds. If no queries are active, ares_fds
will return 0.
Greg Hudson, MIT Information Systems
Copyright 1998 by the Massachusetts Institute of Technology.
23 July 1998