1ARES_INIT(3) Library Functions Manual ARES_INIT(3)
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6 ares_init - Initialize a resolver channel
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9 #include <ares.h>
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11 int ares_init(ares_channel *channelptr)
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14 The ares_init(3) function initializes a communications channel for name
15 service lookups. If it returns successfully, ares_init(3) will set the
16 variable pointed to by channelptr to a handle used to identify the name
17 service channel. The caller should invoke ares_destroy(3) on the han‐
18 dle when the channel is no longer needed.
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20 The ares_init_options(3) function is provide to offer more init alter‐
21 natives.
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24 ares_init(3) can return any of the following values:
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26 ARES_SUCCESS Initialization succeeded.
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28 ARES_EFILE A configuration file could not be read.
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30 ARES_ENOMEM The process's available memory was exhausted.
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32 ARES_ENOTINITIALIZED
33 c-ares library initialization not yet performed.
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36 When initializing from /etc/resolv.conf, ares_init(3) reads the domain
37 and search directives to allow lookups of short names relative to the
38 domains specified. The domain and search directives override one
39 another. If more that one instance of either domain or search direc‐
40 tives is specified, the last occurrence wins. For more information,
41 please see the resolv.conf(5) manual page.
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44 ares_init_options(3), ares_destroy(3), ares_dup(3),
45 ares_library_init(3), ares_set_servers(3)
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48 Greg Hudson, MIT Information Systems
49 Copyright 1998 by the Massachusetts Institute of Technology.
50 Copyright (C) 2004-2010 by Daniel Stenberg.
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54 5 March 2010 ARES_INIT(3)