summaryrefslogtreecommitdiffstats
path: root/contrib/bind9/lib/lwres/man/lwres_gethostent.html
diff options
context:
space:
mode:
authordougb <dougb@FreeBSD.org>2005-12-29 04:22:58 +0000
committerdougb <dougb@FreeBSD.org>2005-12-29 04:22:58 +0000
commit13e6e55147add29e8d7701891f70aefeb3d74645 (patch)
tree570b6e4f35462e81147786cc2f272d28fac7f470 /contrib/bind9/lib/lwres/man/lwres_gethostent.html
parent9123af99f7956e2383e5b9c4d39e84bea89915fe (diff)
downloadFreeBSD-src-13e6e55147add29e8d7701891f70aefeb3d74645.zip
FreeBSD-src-13e6e55147add29e8d7701891f70aefeb3d74645.tar.gz
Vendor import of BIND 9.3.2
Diffstat (limited to 'contrib/bind9/lib/lwres/man/lwres_gethostent.html')
-rw-r--r--contrib/bind9/lib/lwres/man/lwres_gethostent.html1110
1 files changed, 378 insertions, 732 deletions
diff --git a/contrib/bind9/lib/lwres/man/lwres_gethostent.html b/contrib/bind9/lib/lwres/man/lwres_gethostent.html
index 00b285d..263f993 100644
--- a/contrib/bind9/lib/lwres/man/lwres_gethostent.html
+++ b/contrib/bind9/lib/lwres/man/lwres_gethostent.html
@@ -1,784 +1,430 @@
<!--
- - Copyright (C) 2004 Internet Systems Consortium, Inc. ("ISC")
- - Copyright (C) 2001 Internet Software Consortium.
- -
+ - Copyright (C) 2004, 2005 Internet Systems Consortium, Inc. ("ISC")
+ - Copyright (C) 2001 Internet Software Consortium.
+ -
- Permission to use, copy, modify, and distribute this software for any
- purpose with or without fee is hereby granted, provided that the above
- copyright notice and this permission notice appear in all copies.
- -
+ -
- THE SOFTWARE IS PROVIDED "AS IS" AND ISC DISCLAIMS ALL WARRANTIES WITH
- REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
- - AND FITNESS. IN NO EVENT SHALL ISC BE LIABLE FOR ANY SPECIAL, DIRECT,
+ - AND FITNESS. IN NO EVENT SHALL ISC BE LIABLE FOR ANY SPECIAL, DIRECT,
- INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM
- LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE
- OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
- PERFORMANCE OF THIS SOFTWARE.
-->
-
-<!-- $Id: lwres_gethostent.html,v 1.8.2.1.4.2 2004/08/22 23:39:04 marka Exp $ -->
-
-<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
-<HTML
-><HEAD
-><TITLE
->lwres_gethostent</TITLE
-><META
-NAME="GENERATOR"
-CONTENT="Modular DocBook HTML Stylesheet Version 1.7"></HEAD
-><BODY
-CLASS="REFENTRY"
-BGCOLOR="#FFFFFF"
-TEXT="#000000"
-LINK="#0000FF"
-VLINK="#840084"
-ALINK="#0000FF"
-><H1
-><A
-NAME="AEN1"
-></A
->lwres_gethostent</H1
-><DIV
-CLASS="REFNAMEDIV"
-><A
-NAME="AEN8"
-></A
-><H2
->Name</H2
->lwres_gethostbyname, lwres_gethostbyname2, lwres_gethostbyaddr, lwres_gethostent, lwres_sethostent, lwres_endhostent, lwres_gethostbyname_r, lwres_gethostbyaddr_r, lwres_gethostent_r, lwres_sethostent_r, lwres_endhostent_r&nbsp;--&nbsp;lightweight resolver get network host entry</DIV
-><DIV
-CLASS="REFSYNOPSISDIV"
-><A
-NAME="AEN21"
-></A
-><H2
->Synopsis</H2
-><DIV
-CLASS="FUNCSYNOPSIS"
-><P
-></P
-><A
-NAME="AEN22"
-></A
-><PRE
-CLASS="FUNCSYNOPSISINFO"
->#include &lt;lwres/netdb.h&gt;</PRE
-><P
-><CODE
-><CODE
-CLASS="FUNCDEF"
->struct hostent *
-lwres_gethostbyname</CODE
->(const char *name);</CODE
-></P
-><P
-><CODE
-><CODE
-CLASS="FUNCDEF"
->struct hostent *
-lwres_gethostbyname2</CODE
->(const char *name, int af);</CODE
-></P
-><P
-><CODE
-><CODE
-CLASS="FUNCDEF"
->struct hostent *
-lwres_gethostbyaddr</CODE
->(const char *addr, int len, int type);</CODE
-></P
-><P
-><CODE
-><CODE
-CLASS="FUNCDEF"
->struct hostent *
-lwres_gethostent</CODE
->(void);</CODE
-></P
-><P
-><CODE
-><CODE
-CLASS="FUNCDEF"
->void
-lwres_sethostent</CODE
->(int stayopen);</CODE
-></P
-><P
-><CODE
-><CODE
-CLASS="FUNCDEF"
->void
-lwres_endhostent</CODE
->(void);</CODE
-></P
-><P
-><CODE
-><CODE
-CLASS="FUNCDEF"
->struct hostent *
-lwres_gethostbyname_r</CODE
->(const char *name, struct hostent *resbuf, char *buf, int buflen, int *error);</CODE
-></P
-><P
-><CODE
-><CODE
-CLASS="FUNCDEF"
->struct hostent *
-lwres_gethostbyaddr_r</CODE
->(const char *addr, int len, int type, struct hostent *resbuf, char *buf, int buflen, int *error);</CODE
-></P
-><P
-><CODE
-><CODE
-CLASS="FUNCDEF"
->struct hostent *
-lwres_gethostent_r</CODE
->(struct hostent *resbuf, char *buf, int buflen, int *error);</CODE
-></P
-><P
-><CODE
-><CODE
-CLASS="FUNCDEF"
->void
-lwres_sethostent_r</CODE
->(int stayopen);</CODE
-></P
-><P
-><CODE
-><CODE
-CLASS="FUNCDEF"
->void
-lwres_endhostent_r</CODE
->(void);</CODE
-></P
-><P
-></P
-></DIV
-></DIV
-><DIV
-CLASS="REFSECT1"
-><A
-NAME="AEN84"
-></A
-><H2
->DESCRIPTION</H2
-><P
->These functions provide hostname-to-address and
+<!-- $Id: lwres_gethostent.html,v 1.8.2.1.4.8 2005/10/13 02:33:56 marka Exp $ -->
+<html>
+<head>
+<meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1">
+<title>lwres_gethostent</title>
+<meta name="generator" content="DocBook XSL Stylesheets V1.69.1">
+</head>
+<body bgcolor="white" text="black" link="#0000FF" vlink="#840084" alink="#0000FF"><div class="refentry" lang="en">
+<a name="id2463721"></a><div class="titlepage"></div>
+<div class="refnamediv">
+<h2>Name</h2>
+<p>lwres_gethostbyname, lwres_gethostbyname2, lwres_gethostbyaddr, lwres_gethostent, lwres_sethostent, lwres_endhostent, lwres_gethostbyname_r, lwres_gethostbyaddr_r, lwres_gethostent_r, lwres_sethostent_r, lwres_endhostent_r &#8212; lightweight resolver get network host entry</p>
+</div>
+<div class="refsynopsisdiv">
+<h2>Synopsis</h2>
+<div class="funcsynopsis">
+<pre class="funcsynopsisinfo">#include &lt;lwres/netdb.h&gt;</pre>
+<table border="0" summary="Function synopsis" cellspacing="0" cellpadding="0" style="padding-bottom: 1em"><tr>
+<td><code class="funcdef">
+struct hostent *
+<b class="fsfunc">lwres_gethostbyname</b>(</code></td>
+<td> </td>
+<td>
+<code>)</code>;</td>
+</tr></table>
+<table border="0" summary="Function synopsis" cellspacing="0" cellpadding="0" style="padding-bottom: 1em">
+<tr>
+<td><code class="funcdef">
+struct hostent *
+<b class="fsfunc">lwres_gethostbyname2</b>(</code></td>
+<td> </td>
+<td>, </td>
+</tr>
+<tr>
+<td> </td>
+<td> </td>
+<td>
+<code>)</code>;</td>
+</tr>
+</table>
+<table border="0" summary="Function synopsis" cellspacing="0" cellpadding="0" style="padding-bottom: 1em">
+<tr>
+<td><code class="funcdef">
+struct hostent *
+<b class="fsfunc">lwres_gethostbyaddr</b>(</code></td>
+<td> </td>
+<td>, </td>
+</tr>
+<tr>
+<td> </td>
+<td> </td>
+<td>, </td>
+</tr>
+<tr>
+<td> </td>
+<td> </td>
+<td>
+<code>)</code>;</td>
+</tr>
+</table>
+<p><code class="funcdef">
+struct hostent *
+<b class="fsfunc">lwres_gethostent</b>(</code>void<code>)</code>;</p>
+<p><code class="funcdef">
+void
+<b class="fsfunc">lwres_sethostent</b>(</code>int stayopen<code>)</code>;</p>
+<p><code class="funcdef">
+void
+<b class="fsfunc">lwres_endhostent</b>(</code>void<code>)</code>;</p>
+<table border="0" summary="Function synopsis" cellspacing="0" cellpadding="0" style="padding-bottom: 1em">
+<tr>
+<td><code class="funcdef">
+struct hostent *
+<b class="fsfunc">lwres_gethostbyname_r</b>(</code></td>
+<td> </td>
+<td>, </td>
+</tr>
+<tr>
+<td> </td>
+<td> </td>
+<td>, </td>
+</tr>
+<tr>
+<td> </td>
+<td> </td>
+<td>, </td>
+</tr>
+<tr>
+<td> </td>
+<td> </td>
+<td>, </td>
+</tr>
+<tr>
+<td> </td>
+<td> </td>
+<td>
+<code>)</code>;</td>
+</tr>
+</table>
+<table border="0" summary="Function synopsis" cellspacing="0" cellpadding="0" style="padding-bottom: 1em">
+<tr>
+<td><code class="funcdef">
+struct hostent *
+<b class="fsfunc">lwres_gethostbyaddr_r</b>(</code></td>
+<td> </td>
+<td>, </td>
+</tr>
+<tr>
+<td> </td>
+<td> </td>
+<td>, </td>
+</tr>
+<tr>
+<td> </td>
+<td> </td>
+<td>, </td>
+</tr>
+<tr>
+<td> </td>
+<td> </td>
+<td>, </td>
+</tr>
+<tr>
+<td> </td>
+<td> </td>
+<td>, </td>
+</tr>
+<tr>
+<td> </td>
+<td> </td>
+<td>, </td>
+</tr>
+<tr>
+<td> </td>
+<td> </td>
+<td>
+<code>)</code>;</td>
+</tr>
+</table>
+<table border="0" summary="Function synopsis" cellspacing="0" cellpadding="0" style="padding-bottom: 1em">
+<tr>
+<td><code class="funcdef">
+struct hostent *
+<b class="fsfunc">lwres_gethostent_r</b>(</code></td>
+<td> </td>
+<td>, </td>
+</tr>
+<tr>
+<td> </td>
+<td> </td>
+<td>, </td>
+</tr>
+<tr>
+<td> </td>
+<td> </td>
+<td>, </td>
+</tr>
+<tr>
+<td> </td>
+<td> </td>
+<td>
+<code>)</code>;</td>
+</tr>
+</table>
+<p><code class="funcdef">
+void
+<b class="fsfunc">lwres_sethostent_r</b>(</code>int stayopen<code>)</code>;</p>
+<p><code class="funcdef">
+void
+<b class="fsfunc">lwres_endhostent_r</b>(</code>void<code>)</code>;</p>
+</div>
+</div>
+<div class="refsect1" lang="en">
+<a name="id2526041"></a><h2>DESCRIPTION</h2>
+<p>
+These functions provide hostname-to-address and
address-to-hostname lookups by means of the lightweight resolver.
They are similar to the standard
-<SPAN
-CLASS="CITEREFENTRY"
-><SPAN
-CLASS="REFENTRYTITLE"
->gethostent</SPAN
->(3)</SPAN
->
+<span class="citerefentry"><span class="refentrytitle">gethostent</span>(3
+)</span>
functions provided by most operating systems.
They use a
-<SPAN
-CLASS="TYPE"
->struct hostent</SPAN
->
+<span class="type">struct hostent</span>
which is usually defined in
-<TT
-CLASS="FILENAME"
->&lt;namedb.h&gt;</TT
->.
+<code class="filename">&lt;namedb.h&gt;</code>.
-<PRE
-CLASS="PROGRAMLISTING"
->struct hostent {
+</p>
+<pre class="programlisting">
+struct hostent {
char *h_name; /* official name of host */
char **h_aliases; /* alias list */
int h_addrtype; /* host address type */
int h_length; /* length of address */
char **h_addr_list; /* list of addresses from name server */
};
-#define h_addr h_addr_list[0] /* address, for backward compatibility */</PRE
-></P
-><P
->The members of this structure are:
-<P
-></P
-><DIV
-CLASS="VARIABLELIST"
-><DL
-><DT
-><CODE
-CLASS="CONSTANT"
->h_name</CODE
-></DT
-><DD
-><P
->The official (canonical) name of the host.</P
-></DD
-><DT
-><CODE
-CLASS="CONSTANT"
->h_aliases</CODE
-></DT
-><DD
-><P
->A NULL-terminated array of alternate names (nicknames) for the host.</P
-></DD
-><DT
-><CODE
-CLASS="CONSTANT"
->h_addrtype</CODE
-></DT
-><DD
-><P
->The type of address being returned &mdash;
-<SPAN
-CLASS="TYPE"
->PF_INET</SPAN
->
+#define h_addr h_addr_list[0] /* address, for backward compatibility */
+</pre>
+<p>
+</p>
+<p>
+The members of this structure are:
+</p>
+<div class="variablelist"><dl>
+<dt><span class="term"><code class="constant">h_name</code></span></dt>
+<dd><p>
+The official (canonical) name of the host.
+</p></dd>
+<dt><span class="term"><code class="constant">h_aliases</code></span></dt>
+<dd><p>
+A NULL-terminated array of alternate names (nicknames) for the host.
+</p></dd>
+<dt><span class="term"><code class="constant">h_addrtype</code></span></dt>
+<dd><p>
+The type of address being returned &#8212;
+<span class="type">PF_INET</span>
or
-<SPAN
-CLASS="TYPE"
->PF_INET6</SPAN
->.</P
-></DD
-><DT
-><CODE
-CLASS="CONSTANT"
->h_length</CODE
-></DT
-><DD
-><P
->The length of the address in bytes.</P
-></DD
-><DT
-><CODE
-CLASS="CONSTANT"
->h_addr_list</CODE
-></DT
-><DD
-><P
->A <SPAN
-CLASS="TYPE"
->NULL</SPAN
->
+<span class="type">PF_INET6</span>.
+</p></dd>
+<dt><span class="term"><code class="constant">h_length</code></span></dt>
+<dd><p>
+The length of the address in bytes.
+</p></dd>
+<dt><span class="term"><code class="constant">h_addr_list</code></span></dt>
+<dd><p>
+A <span class="type">NULL</span>
terminated array of network addresses for the host.
-Host addresses are returned in network byte order.</P
-></DD
-></DL
-></DIV
-></P
-><P
->For backward compatibility with very old software,
-<CODE
-CLASS="CONSTANT"
->h_addr</CODE
->
+Host addresses are returned in network byte order.
+</p></dd>
+</dl></div>
+<p>
+</p>
+<p>
+For backward compatibility with very old software,
+<code class="constant">h_addr</code>
is the first address in
-<CODE
-CLASS="CONSTANT"
->h_addr_list.</CODE
-></P
-><P
-><CODE
-CLASS="FUNCTION"
->lwres_gethostent()</CODE
->,
-<CODE
-CLASS="FUNCTION"
->lwres_sethostent()</CODE
->,
-<CODE
-CLASS="FUNCTION"
->lwres_endhostent()</CODE
->,
-<CODE
-CLASS="FUNCTION"
->lwres_gethostent_r()</CODE
->,
-<CODE
-CLASS="FUNCTION"
->lwres_sethostent_r()</CODE
->
+<code class="constant">h_addr_list.</code>
+</p>
+<p>
+<code class="function">lwres_gethostent()</code>,
+<code class="function">lwres_sethostent()</code>,
+<code class="function">lwres_endhostent()</code>,
+<code class="function">lwres_gethostent_r()</code>,
+<code class="function">lwres_sethostent_r()</code>
and
-<CODE
-CLASS="FUNCTION"
->lwres_endhostent_r()</CODE
->
+<code class="function">lwres_endhostent_r()</code>
provide iteration over the known host entries on systems that
provide such functionality through facilities like
-<TT
-CLASS="FILENAME"
->/etc/hosts</TT
->
+<code class="filename">/etc/hosts</code>
or NIS. The lightweight resolver does not currently implement
these functions; it only provides them as stub functions that always
-return failure.</P
-><P
-><CODE
-CLASS="FUNCTION"
->lwres_gethostbyname()</CODE
-> and
-<CODE
-CLASS="FUNCTION"
->lwres_gethostbyname2()</CODE
-> look up the hostname
-<VAR
-CLASS="PARAMETER"
->name</VAR
->.
-<CODE
-CLASS="FUNCTION"
->lwres_gethostbyname()</CODE
-> always looks for an IPv4
-address while <CODE
-CLASS="FUNCTION"
->lwres_gethostbyname2()</CODE
-> looks for an
-address of protocol family <VAR
-CLASS="PARAMETER"
->af</VAR
->: either
-<SPAN
-CLASS="TYPE"
->PF_INET</SPAN
-> or <SPAN
-CLASS="TYPE"
->PF_INET6</SPAN
-> &mdash; IPv4 or IPV6
+return failure.
+</p>
+<p>
+<code class="function">lwres_gethostbyname()</code> and
+<code class="function">lwres_gethostbyname2()</code> look up the hostname
+<em class="parameter"><code>name</code></em>.
+<code class="function">lwres_gethostbyname()</code> always looks for an IPv4
+address while <code class="function">lwres_gethostbyname2()</code> looks for an
+address of protocol family <em class="parameter"><code>af</code></em>: either
+<span class="type">PF_INET</span> or <span class="type">PF_INET6</span> &#8212; IPv4 or IPV6
addresses respectively. Successful calls of the functions return a
-<SPAN
-CLASS="TYPE"
->struct hostent</SPAN
->for the name that was looked up.
-<SPAN
-CLASS="TYPE"
->NULL</SPAN
-> is returned if the lookups by
-<CODE
-CLASS="FUNCTION"
->lwres_gethostbyname()</CODE
-> or
-<CODE
-CLASS="FUNCTION"
->lwres_gethostbyname2()</CODE
-> fail.</P
-><P
->Reverse lookups of addresses are performed by
-<CODE
-CLASS="FUNCTION"
->lwres_gethostbyaddr()</CODE
->.
-<VAR
-CLASS="PARAMETER"
->addr</VAR
-> is an address of length
-<VAR
-CLASS="PARAMETER"
->len</VAR
-> bytes and protocol family
-<VAR
-CLASS="PARAMETER"
->type</VAR
-> &mdash; <SPAN
-CLASS="TYPE"
->PF_INET</SPAN
-> or
-<SPAN
-CLASS="TYPE"
->PF_INET6</SPAN
->.
-<CODE
-CLASS="FUNCTION"
->lwres_gethostbyname_r()</CODE
-> is a thread-safe function
+<span class="type">struct hostent</span>for the name that was looked up.
+<span class="type">NULL</span> is returned if the lookups by
+<code class="function">lwres_gethostbyname()</code> or
+<code class="function">lwres_gethostbyname2()</code> fail.
+</p>
+<p>
+Reverse lookups of addresses are performed by
+<code class="function">lwres_gethostbyaddr()</code>.
+<em class="parameter"><code>addr</code></em> is an address of length
+<em class="parameter"><code>len</code></em> bytes and protocol family
+<em class="parameter"><code>type</code></em> &#8212; <span class="type">PF_INET</span> or
+<span class="type">PF_INET6</span>.
+<code class="function">lwres_gethostbyname_r()</code> is a thread-safe function
for forward lookups. If an error occurs, an error code is returned in
-<VAR
-CLASS="PARAMETER"
->*error</VAR
->.
-<VAR
-CLASS="PARAMETER"
->resbuf</VAR
-> is a pointer to a <SPAN
-CLASS="TYPE"
->struct
-hostent</SPAN
-> which is initialised by a successful call to
-<CODE
-CLASS="FUNCTION"
->lwres_gethostbyname_r()</CODE
-> .
-<VAR
-CLASS="PARAMETER"
->buf</VAR
-> is a buffer of length
-<VAR
-CLASS="PARAMETER"
->len</VAR
-> bytes which is used to store the
-<CODE
-CLASS="CONSTANT"
->h_name</CODE
->, <CODE
-CLASS="CONSTANT"
->h_aliases</CODE
->, and
-<CODE
-CLASS="CONSTANT"
->h_addr_list</CODE
-> elements of the <SPAN
-CLASS="TYPE"
->struct
-hostent</SPAN
-> returned in <VAR
-CLASS="PARAMETER"
->resbuf</VAR
->.
-Successful calls to <CODE
-CLASS="FUNCTION"
->lwres_gethostbyname_r()</CODE
->
-return <VAR
-CLASS="PARAMETER"
->resbuf</VAR
->,
-which is a pointer to the <SPAN
-CLASS="TYPE"
->struct hostent</SPAN
-> it created.</P
-><P
-><CODE
-CLASS="FUNCTION"
->lwres_gethostbyaddr_r()</CODE
-> is a thread-safe function
-that performs a reverse lookup of address <VAR
-CLASS="PARAMETER"
->addr</VAR
->
-which is <VAR
-CLASS="PARAMETER"
->len</VAR
-> bytes long and is of protocol
-family <VAR
-CLASS="PARAMETER"
->type</VAR
-> &mdash; <SPAN
-CLASS="TYPE"
->PF_INET</SPAN
-> or
-<SPAN
-CLASS="TYPE"
->PF_INET6</SPAN
->. If an error occurs, the error code is returned
-in <VAR
-CLASS="PARAMETER"
->*error</VAR
->. The other function parameters are
-identical to those in <CODE
-CLASS="FUNCTION"
->lwres_gethostbyname_r()</CODE
->.
-<VAR
-CLASS="PARAMETER"
->resbuf</VAR
-> is a pointer to a <SPAN
-CLASS="TYPE"
->struct
-hostent</SPAN
-> which is initialised by a successful call to
-<CODE
-CLASS="FUNCTION"
->lwres_gethostbyaddr_r()</CODE
->.
-<VAR
-CLASS="PARAMETER"
->buf</VAR
-> is a buffer of length
-<VAR
-CLASS="PARAMETER"
->len</VAR
-> bytes which is used to store the
-<CODE
-CLASS="CONSTANT"
->h_name</CODE
->, <CODE
-CLASS="CONSTANT"
->h_aliases</CODE
->, and
-<CODE
-CLASS="CONSTANT"
->h_addr_list</CODE
-> elements of the <SPAN
-CLASS="TYPE"
->struct
-hostent</SPAN
-> returned in <VAR
-CLASS="PARAMETER"
->resbuf</VAR
->. Successful
-calls to <CODE
-CLASS="FUNCTION"
->lwres_gethostbyaddr_r()</CODE
-> return
-<VAR
-CLASS="PARAMETER"
->resbuf</VAR
->, which is a pointer to the
-<CODE
-CLASS="FUNCTION"
->struct hostent()</CODE
-> it created.</P
-></DIV
-><DIV
-CLASS="REFSECT1"
-><A
-NAME="AEN191"
-></A
-><H2
->RETURN VALUES</H2
-><P
->The functions
-<CODE
-CLASS="FUNCTION"
->lwres_gethostbyname()</CODE
->,
-<CODE
-CLASS="FUNCTION"
->lwres_gethostbyname2()</CODE
->,
-<CODE
-CLASS="FUNCTION"
->lwres_gethostbyaddr()</CODE
->,
+<em class="parameter"><code>*error</code></em>.
+<em class="parameter"><code>resbuf</code></em> is a pointer to a <span class="type">struct
+hostent</span> which is initialised by a successful call to
+<code class="function">lwres_gethostbyname_r()</code> .
+<em class="parameter"><code>buf</code></em> is a buffer of length
+<em class="parameter"><code>len</code></em> bytes which is used to store the
+<code class="constant">h_name</code>, <code class="constant">h_aliases</code>, and
+<code class="constant">h_addr_list</code> elements of the <span class="type">struct
+hostent</span> returned in <em class="parameter"><code>resbuf</code></em>.
+Successful calls to <code class="function">lwres_gethostbyname_r()</code>
+return <em class="parameter"><code>resbuf</code></em>,
+which is a pointer to the <span class="type">struct hostent</span> it created.
+</p>
+<p>
+<code class="function">lwres_gethostbyaddr_r()</code> is a thread-safe function
+that performs a reverse lookup of address <em class="parameter"><code>addr</code></em>
+which is <em class="parameter"><code>len</code></em> bytes long and is of protocol
+family <em class="parameter"><code>type</code></em> &#8212; <span class="type">PF_INET</span> or
+<span class="type">PF_INET6</span>. If an error occurs, the error code is returned
+in <em class="parameter"><code>*error</code></em>. The other function parameters are
+identical to those in <code class="function">lwres_gethostbyname_r()</code>.
+<em class="parameter"><code>resbuf</code></em> is a pointer to a <span class="type">struct
+hostent</span> which is initialised by a successful call to
+<code class="function">lwres_gethostbyaddr_r()</code>.
+<em class="parameter"><code>buf</code></em> is a buffer of length
+<em class="parameter"><code>len</code></em> bytes which is used to store the
+<code class="constant">h_name</code>, <code class="constant">h_aliases</code>, and
+<code class="constant">h_addr_list</code> elements of the <span class="type">struct
+hostent</span> returned in <em class="parameter"><code>resbuf</code></em>. Successful
+calls to <code class="function">lwres_gethostbyaddr_r()</code> return
+<em class="parameter"><code>resbuf</code></em>, which is a pointer to the
+<code class="function">struct hostent()</code> it created.
+</p>
+</div>
+<div class="refsect1" lang="en">
+<a name="id2526380"></a><h2>RETURN VALUES</h2>
+<p>
+The functions
+<code class="function">lwres_gethostbyname()</code>,
+<code class="function">lwres_gethostbyname2()</code>,
+<code class="function">lwres_gethostbyaddr()</code>,
and
-<CODE
-CLASS="FUNCTION"
->lwres_gethostent()</CODE
->
+<code class="function">lwres_gethostent()</code>
return NULL to indicate an error. In this case the global variable
-<SPAN
-CLASS="TYPE"
->lwres_h_errno</SPAN
->
+<span class="type">lwres_h_errno</span>
will contain one of the following error codes defined in
-<TT
-CLASS="FILENAME"
->&lt;lwres/netdb.h&gt;</TT
->:
+<code class="filename">&lt;lwres/netdb.h&gt;</code>:
-<P
-></P
-><DIV
-CLASS="VARIABLELIST"
-><DL
-><DT
-><CODE
-CLASS="CONSTANT"
->HOST_NOT_FOUND</CODE
-></DT
-><DD
-><P
->The host or address was not found.</P
-></DD
-><DT
-><CODE
-CLASS="CONSTANT"
->TRY_AGAIN</CODE
-></DT
-><DD
-><P
->A recoverable error occurred, e.g., a timeout.
-Retrying the lookup may succeed.</P
-></DD
-><DT
-><CODE
-CLASS="CONSTANT"
->NO_RECOVERY</CODE
-></DT
-><DD
-><P
->A non-recoverable error occurred.</P
-></DD
-><DT
-><CODE
-CLASS="CONSTANT"
->NO_DATA</CODE
-></DT
-><DD
-><P
->The name exists, but has no address information
+</p>
+<div class="variablelist"><dl>
+<dt><span class="term"><code class="constant">HOST_NOT_FOUND</code></span></dt>
+<dd><p>
+The host or address was not found.
+</p></dd>
+<dt><span class="term"><code class="constant">TRY_AGAIN</code></span></dt>
+<dd><p>
+A recoverable error occurred, e.g., a timeout.
+Retrying the lookup may succeed.
+</p></dd>
+<dt><span class="term"><code class="constant">NO_RECOVERY</code></span></dt>
+<dd><p>
+A non-recoverable error occurred.
+</p></dd>
+<dt><span class="term"><code class="constant">NO_DATA</code></span></dt>
+<dd><p>
+The name exists, but has no address information
associated with it (or vice versa in the case
of a reverse lookup). The code NO_ADDRESS
is accepted as a synonym for NO_DATA for backwards
-compatibility.</P
-></DD
-></DL
-></DIV
-></P
-><P
-><SPAN
-CLASS="CITEREFENTRY"
-><SPAN
-CLASS="REFENTRYTITLE"
->lwres_hstrerror</SPAN
->(3)</SPAN
->
-translates these error codes to suitable error messages.</P
-><P
-><CODE
-CLASS="FUNCTION"
->lwres_gethostent()</CODE
->
+compatibility.
+</p></dd>
+</dl></div>
+<p>
+</p>
+<p>
+<span class="citerefentry"><span class="refentrytitle">lwres_hstrerror</span>(3
+)</span>
+translates these error codes to suitable error messages.
+</p>
+<p>
+<code class="function">lwres_gethostent()</code>
and
-<CODE
-CLASS="FUNCTION"
->lwres_gethostent_r()</CODE
->
+<code class="function">lwres_gethostent_r()</code>
always return
-<SPAN
-CLASS="TYPE"
->NULL</SPAN
->.</P
-><P
->Successful calls to <CODE
-CLASS="FUNCTION"
->lwres_gethostbyname_r()</CODE
-> and
-<CODE
-CLASS="FUNCTION"
->lwres_gethostbyaddr_r()</CODE
-> return
-<VAR
-CLASS="PARAMETER"
->resbuf</VAR
->, a pointer to the <SPAN
-CLASS="TYPE"
->struct
-hostent</SPAN
-> that was initialised by these functions. They return
-<SPAN
-CLASS="TYPE"
->NULL</SPAN
-> if the lookups fail or if <VAR
-CLASS="PARAMETER"
->buf</VAR
->
+<span class="type">NULL</span>.
+</p>
+<p>
+Successful calls to <code class="function">lwres_gethostbyname_r()</code> and
+<code class="function">lwres_gethostbyaddr_r()</code> return
+<em class="parameter"><code>resbuf</code></em>, a pointer to the <span class="type">struct
+hostent</span> that was initialised by these functions. They return
+<span class="type">NULL</span> if the lookups fail or if <em class="parameter"><code>buf</code></em>
was too small to hold the list of addresses and names referenced by
-the <CODE
-CLASS="CONSTANT"
->h_name</CODE
->, <CODE
-CLASS="CONSTANT"
->h_aliases</CODE
->, and
-<CODE
-CLASS="CONSTANT"
->h_addr_list</CODE
-> elements of the <SPAN
-CLASS="TYPE"
->struct
-hostent</SPAN
->. If <VAR
-CLASS="PARAMETER"
->buf</VAR
-> was too small, both
-<CODE
-CLASS="FUNCTION"
->lwres_gethostbyname_r()</CODE
-> and
-<CODE
-CLASS="FUNCTION"
->lwres_gethostbyaddr_r()</CODE
-> set the global variable
-<SPAN
-CLASS="TYPE"
->errno</SPAN
-> to <SPAN
-CLASS="ERRORCODE"
->ERANGE</SPAN
->.</P
-></DIV
-><DIV
-CLASS="REFSECT1"
-><A
-NAME="AEN245"
-></A
-><H2
->SEE ALSO</H2
-><P
-><SPAN
-CLASS="CITEREFENTRY"
-><SPAN
-CLASS="REFENTRYTITLE"
->gethostent</SPAN
->(3)</SPAN
->,
+the <code class="constant">h_name</code>, <code class="constant">h_aliases</code>, and
+<code class="constant">h_addr_list</code> elements of the <span class="type">struct
+hostent</span>. If <em class="parameter"><code>buf</code></em> was too small, both
+<code class="function">lwres_gethostbyname_r()</code> and
+<code class="function">lwres_gethostbyaddr_r()</code> set the global variable
+<span class="type">errno</span> to <span class="errorcode">ERANGE</span>.
+</p>
+</div>
+<div class="refsect1" lang="en">
+<a name="id2526540"></a><h2>SEE ALSO</h2>
+<p>
+<span class="citerefentry"><span class="refentrytitle">gethostent</span>(3)</span>,
-<SPAN
-CLASS="CITEREFENTRY"
-><SPAN
-CLASS="REFENTRYTITLE"
->lwres_getipnode</SPAN
->(3)</SPAN
->,
+<span class="citerefentry"><span class="refentrytitle">lwres_getipnode</span>(3)</span>,
-<SPAN
-CLASS="CITEREFENTRY"
-><SPAN
-CLASS="REFENTRYTITLE"
->lwres_hstrerror</SPAN
->(3)</SPAN
-></P
-></DIV
-><DIV
-CLASS="REFSECT1"
-><A
-NAME="AEN257"
-></A
-><H2
->BUGS</H2
-><P
-><CODE
-CLASS="FUNCTION"
->lwres_gethostbyname()</CODE
->,
-<CODE
-CLASS="FUNCTION"
->lwres_gethostbyname2()</CODE
->,
-<CODE
-CLASS="FUNCTION"
->lwres_gethostbyaddr()</CODE
->
+<span class="citerefentry"><span class="refentrytitle">lwres_hstrerror</span>(3
+)</span>
+</p>
+</div>
+<div class="refsect1" lang="en">
+<a name="id2526644"></a><h2>BUGS</h2>
+<p>
+<code class="function">lwres_gethostbyname()</code>,
+<code class="function">lwres_gethostbyname2()</code>,
+<code class="function">lwres_gethostbyaddr()</code>
and
-<CODE
-CLASS="FUNCTION"
->lwres_endhostent()</CODE
->
+<code class="function">lwres_endhostent()</code>
are not thread safe; they return pointers to static data and
provide error codes through a global variable.
Thread-safe versions for name and address lookup are provided by
-<CODE
-CLASS="FUNCTION"
->lwres_gethostbyname_r()</CODE
->,
+<code class="function">lwres_gethostbyname_r()</code>,
and
-<CODE
-CLASS="FUNCTION"
->lwres_gethostbyaddr_r()</CODE
->
-respectively.</P
-><P
->The resolver daemon does not currently support any non-DNS
+<code class="function">lwres_gethostbyaddr_r()</code>
+respectively.
+</p>
+<p>
+The resolver daemon does not currently support any non-DNS
name services such as
-<TT
-CLASS="FILENAME"
->/etc/hosts</TT
->
+<code class="filename">/etc/hosts</code>
or
-<SPAN
-CLASS="TYPE"
->NIS</SPAN
->,
-consequently the above functions don't, either.</P
-></DIV
-></BODY
-></HTML
->
+<span class="type">NIS</span>,
+consequently the above functions don't, either.
+</p>
+</div>
+</div></body>
+</html>
OpenPOWER on IntegriCloud