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Diffstat (limited to 'contrib/bind9/lib/lwres/man/lwres_gethostent.docbook')
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1 files changed, 348 insertions, 330 deletions
diff --git a/contrib/bind9/lib/lwres/man/lwres_gethostent.docbook b/contrib/bind9/lib/lwres/man/lwres_gethostent.docbook index 9f92d3b..41a3bc3 100644 --- a/contrib/bind9/lib/lwres/man/lwres_gethostent.docbook +++ b/contrib/bind9/lib/lwres/man/lwres_gethostent.docbook @@ -1,8 +1,8 @@ -<!DOCTYPE book PUBLIC "-//OASIS//DTD DocBook XML V4.0//EN" - "http://www.oasis-open.org/docbook/xml/4.0/docbookx.dtd" +<!DOCTYPE book PUBLIC "-//OASIS//DTD DocBook XML V4.2//EN" + "http://www.oasis-open.org/docbook/xml/4.2/docbookx.dtd" [<!ENTITY mdash "—">]> <!-- - - Copyright (C) 2004, 2005 Internet Systems Consortium, Inc. ("ISC") + - Copyright (C) 2004, 2005, 2007 Internet Systems Consortium, Inc. ("ISC") - Copyright (C) 2001 Internet Software Consortium. - - Permission to use, copy, modify, and distribute this software for any @@ -18,24 +18,24 @@ - PERFORMANCE OF THIS SOFTWARE. --> -<!-- $Id: lwres_gethostent.docbook,v 1.5.206.3 2005/05/13 01:22:36 marka Exp $ --> - +<!-- $Id: lwres_gethostent.docbook,v 1.6.18.4 2007/01/29 23:57:21 marka Exp $ --> <refentry> -<refentryinfo> -<date>Jun 30, 2000</date> -</refentryinfo> + <refentryinfo> + <date>Jun 30, 2000</date> + </refentryinfo> -<refmeta> -<refentrytitle>lwres_gethostent</refentrytitle> -<manvolnum>3</manvolnum> -<refmiscinfo>BIND9</refmiscinfo> -</refmeta> + <refmeta> + <refentrytitle>lwres_gethostent</refentrytitle> + <manvolnum>3</manvolnum> + <refmiscinfo>BIND9</refmiscinfo> + </refmeta> <docinfo> <copyright> <year>2004</year> <year>2005</year> + <year>2007</year> <holder>Internet Systems Consortium, Inc. ("ISC")</holder> </copyright> <copyright> @@ -44,125 +44,124 @@ </copyright> </docinfo> -<refnamediv> -<refname>lwres_gethostbyname</refname> -<refname>lwres_gethostbyname2</refname> -<refname>lwres_gethostbyaddr</refname> -<refname>lwres_gethostent</refname> -<refname>lwres_sethostent</refname> -<refname>lwres_endhostent</refname> -<refname>lwres_gethostbyname_r</refname> -<refname>lwres_gethostbyaddr_r</refname> -<refname>lwres_gethostent_r</refname> -<refname>lwres_sethostent_r</refname> -<refname>lwres_endhostent_r</refname> -<refpurpose>lightweight resolver get network host entry</refpurpose> -</refnamediv> -<refsynopsisdiv> -<funcsynopsis> + <refnamediv> + <refname>lwres_gethostbyname</refname> + <refname>lwres_gethostbyname2</refname> + <refname>lwres_gethostbyaddr</refname> + <refname>lwres_gethostent</refname> + <refname>lwres_sethostent</refname> + <refname>lwres_endhostent</refname> + <refname>lwres_gethostbyname_r</refname> + <refname>lwres_gethostbyaddr_r</refname> + <refname>lwres_gethostent_r</refname> + <refname>lwres_sethostent_r</refname> + <refname>lwres_endhostent_r</refname> + <refpurpose>lightweight resolver get network host entry</refpurpose> + </refnamediv> + <refsynopsisdiv> + <funcsynopsis> <funcsynopsisinfo>#include <lwres/netdb.h></funcsynopsisinfo> <funcprototype> -<funcdef> + <funcdef> struct hostent * <function>lwres_gethostbyname</function></funcdef> -<paramdef>const char *name</paramdef> -</funcprototype> + <paramdef>const char *<parameter>name</parameter></paramdef> + </funcprototype> <funcprototype> -<funcdef> + <funcdef> struct hostent * <function>lwres_gethostbyname2</function></funcdef> -<paramdef>const char *name</paramdef> -<paramdef>int af</paramdef> -</funcprototype> + <paramdef>const char *<parameter>name</parameter></paramdef> + <paramdef>int <parameter>af</parameter></paramdef> + </funcprototype> <funcprototype> -<funcdef> + <funcdef> struct hostent * <function>lwres_gethostbyaddr</function></funcdef> -<paramdef>const char *addr</paramdef> -<paramdef>int len</paramdef> -<paramdef>int type</paramdef> -</funcprototype> + <paramdef>const char *<parameter>addr</parameter></paramdef> + <paramdef>int <parameter>len</parameter></paramdef> + <paramdef>int <parameter>type</parameter></paramdef> + </funcprototype> <funcprototype> -<funcdef> + <funcdef> struct hostent * <function>lwres_gethostent</function></funcdef> -<paramdef>void</paramdef> -</funcprototype> + <paramdef>void</paramdef> + </funcprototype> <funcprototype> -<funcdef> + <funcdef> void <function>lwres_sethostent</function></funcdef> -<paramdef>int stayopen</paramdef> -</funcprototype> + <paramdef>int <parameter>stayopen</parameter></paramdef> + </funcprototype> <funcprototype> -<funcdef> + <funcdef> void <function>lwres_endhostent</function></funcdef> -<paramdef>void</paramdef> -</funcprototype> + <paramdef>void</paramdef> + </funcprototype> <funcprototype> -<funcdef> + <funcdef> struct hostent * <function>lwres_gethostbyname_r</function></funcdef> -<paramdef>const char *name</paramdef> -<paramdef>struct hostent *resbuf</paramdef> -<paramdef>char *buf</paramdef> -<paramdef>int buflen</paramdef> -<paramdef>int *error</paramdef> -</funcprototype> + <paramdef>const char *<parameter>name</parameter></paramdef> + <paramdef>struct hostent *<parameter>resbuf</parameter></paramdef> + <paramdef>char *<parameter>buf</parameter></paramdef> + <paramdef>int <parameter>buflen</parameter></paramdef> + <paramdef>int *<parameter>error</parameter></paramdef> + </funcprototype> <funcprototype> -<funcdef> + <funcdef> struct hostent * <function>lwres_gethostbyaddr_r</function></funcdef> -<paramdef>const char *addr</paramdef> -<paramdef>int len</paramdef> -<paramdef>int type</paramdef> -<paramdef>struct hostent *resbuf</paramdef> -<paramdef>char *buf</paramdef> -<paramdef>int buflen</paramdef> -<paramdef>int *error</paramdef> -</funcprototype> + <paramdef>const char *<parameter>addr</parameter></paramdef> + <paramdef>int <parameter>len</parameter></paramdef> + <paramdef>int <parameter>type</parameter></paramdef> + <paramdef>struct hostent *<parameter>resbuf</parameter></paramdef> + <paramdef>char *<parameter>buf</parameter></paramdef> + <paramdef>int <parameter>buflen</parameter></paramdef> + <paramdef>int *<parameter>error</parameter></paramdef> + </funcprototype> <funcprototype> -<funcdef> + <funcdef> struct hostent * <function>lwres_gethostent_r</function></funcdef> -<paramdef>struct hostent *resbuf</paramdef> -<paramdef>char *buf</paramdef> -<paramdef>int buflen</paramdef> -<paramdef>int *error</paramdef> -</funcprototype> + <paramdef>struct hostent *<parameter>resbuf</parameter></paramdef> + <paramdef>char *<parameter>buf</parameter></paramdef> + <paramdef>int <parameter>buflen</parameter></paramdef> + <paramdef>int *<parameter>error</parameter></paramdef> + </funcprototype> <funcprototype> -<funcdef> + <funcdef> void <function>lwres_sethostent_r</function></funcdef> -<paramdef>int stayopen</paramdef> -</funcprototype> + <paramdef>int <parameter>stayopen</parameter></paramdef> + </funcprototype> <funcprototype> -<funcdef> + <funcdef> void <function>lwres_endhostent_r</function></funcdef> -<paramdef>void</paramdef> -</funcprototype> + <paramdef>void</paramdef> + </funcprototype> </funcsynopsis> -</refsynopsisdiv> - -<refsect1> -<title>DESCRIPTION</title> -<para> -These functions provide hostname-to-address and -address-to-hostname lookups by means of the lightweight resolver. -They are similar to the standard -<citerefentry> -<refentrytitle>gethostent</refentrytitle><manvolnum>3 -</manvolnum> -</citerefentry> -functions provided by most operating systems. -They use a -<type>struct hostent</type> -which is usually defined in -<filename><namedb.h></filename>. + </refsynopsisdiv> -<programlisting> + <refsect1> + <title>DESCRIPTION</title> + <para> + These functions provide hostname-to-address and + address-to-hostname lookups by means of the lightweight resolver. + They are similar to the standard + <citerefentry> + <refentrytitle>gethostent</refentrytitle><manvolnum>3</manvolnum> + </citerefentry> + functions provided by most operating systems. + They use a + <type>struct hostent</type> + which is usually defined in + <filename><namedb.h></filename>. + </para> + <para><programlisting> struct hostent { char *h_name; /* official name of host */ char **h_aliases; /* alias list */ @@ -172,250 +171,269 @@ struct hostent { }; #define h_addr h_addr_list[0] /* address, for backward compatibility */ </programlisting> -</para> -<para> -The members of this structure are: -<variablelist> -<varlistentry><term><constant>h_name</constant></term> -<listitem> -<para> -The official (canonical) name of the host. -</para> -</listitem></varlistentry> -<varlistentry><term><constant>h_aliases</constant></term> -<listitem> -<para> -A NULL-terminated array of alternate names (nicknames) for the host. -</para> -</listitem></varlistentry> -<varlistentry><term><constant>h_addrtype</constant></term> -<listitem> -<para> -The type of address being returned — -<type>PF_INET</type> -or -<type>PF_INET6</type>. -</para> -</listitem></varlistentry> -<varlistentry><term><constant>h_length</constant></term> -<listitem> -<para> -The length of the address in bytes. -</para> -</listitem></varlistentry> -<varlistentry><term><constant>h_addr_list</constant></term> -<listitem> -<para> -A <type>NULL</type> -terminated array of network addresses for the host. -Host addresses are returned in network byte order. -</para> -</listitem></varlistentry> -</variablelist> -</para> -<para> -For backward compatibility with very old software, -<constant>h_addr</constant> -is the first address in -<constant>h_addr_list.</constant> -</para> -<para> -<function>lwres_gethostent()</function>, -<function>lwres_sethostent()</function>, -<function>lwres_endhostent()</function>, -<function>lwres_gethostent_r()</function>, -<function>lwres_sethostent_r()</function> -and -<function>lwres_endhostent_r()</function> -provide iteration over the known host entries on systems that -provide such functionality through facilities like -<filename>/etc/hosts</filename> -or NIS. The lightweight resolver does not currently implement -these functions; it only provides them as stub functions that always -return failure. -</para> + </para> + <para> + The members of this structure are: + <variablelist> + <varlistentry> + <term><constant>h_name</constant></term> + <listitem> + <para> + The official (canonical) name of the host. + </para> + </listitem> + </varlistentry> + <varlistentry> + <term><constant>h_aliases</constant></term> + <listitem> + <para> + A NULL-terminated array of alternate names (nicknames) for the + host. + </para> + </listitem> + </varlistentry> + <varlistentry> + <term><constant>h_addrtype</constant></term> + <listitem> + <para> + The type of address being returned — + <type>PF_INET</type> + or + <type>PF_INET6</type>. + </para> + </listitem> + </varlistentry> + <varlistentry> + <term><constant>h_length</constant></term> + <listitem> + <para> + The length of the address in bytes. + </para> + </listitem> + </varlistentry> + <varlistentry> + <term><constant>h_addr_list</constant></term> + <listitem> + <para> + A <type>NULL</type> + terminated array of network addresses for the host. + Host addresses are returned in network byte order. + </para> + </listitem> + </varlistentry> + </variablelist> + </para> + <para> + For backward compatibility with very old software, + <constant>h_addr</constant> + is the first address in + <constant>h_addr_list.</constant> + </para> + <para><function>lwres_gethostent()</function>, + <function>lwres_sethostent()</function>, + <function>lwres_endhostent()</function>, + <function>lwres_gethostent_r()</function>, + <function>lwres_sethostent_r()</function> + and + <function>lwres_endhostent_r()</function> + provide iteration over the known host entries on systems that + provide such functionality through facilities like + <filename>/etc/hosts</filename> + or NIS. The lightweight resolver does not currently implement + these functions; it only provides them as stub functions that always + return failure. + </para> -<para> -<function>lwres_gethostbyname()</function> and -<function>lwres_gethostbyname2()</function> look up the hostname -<parameter>name</parameter>. -<function>lwres_gethostbyname()</function> always looks for an IPv4 -address while <function>lwres_gethostbyname2()</function> looks for an -address of protocol family <parameter>af</parameter>: either -<type>PF_INET</type> or <type>PF_INET6</type> — IPv4 or IPV6 -addresses respectively. Successful calls of the functions return a -<type>struct hostent</type>for the name that was looked up. -<type>NULL</type> is returned if the lookups by -<function>lwres_gethostbyname()</function> or -<function>lwres_gethostbyname2()</function> fail. -</para> + <para><function>lwres_gethostbyname()</function> + and <function>lwres_gethostbyname2()</function> look up the + hostname <parameter>name</parameter>. + <function>lwres_gethostbyname()</function> always looks for an + IPv4 address while <function>lwres_gethostbyname2()</function> + looks for an address of protocol family + <parameter>af</parameter>: either <type>PF_INET</type> or + <type>PF_INET6</type> — IPv4 or IPV6 addresses + respectively. Successful calls of the functions return a + <type>struct hostent</type>for the name that was looked up. + <type>NULL</type> is returned if the lookups by + <function>lwres_gethostbyname()</function> or + <function>lwres_gethostbyname2()</function> fail. + </para> -<para> -Reverse lookups of addresses are performed by -<function>lwres_gethostbyaddr()</function>. -<parameter>addr</parameter> is an address of length -<parameter>len</parameter> bytes and protocol family -<parameter>type</parameter> — <type>PF_INET</type> or -<type>PF_INET6</type>. -<function>lwres_gethostbyname_r()</function> is a thread-safe function -for forward lookups. If an error occurs, an error code is returned in -<parameter>*error</parameter>. -<parameter>resbuf</parameter> is a pointer to a <type>struct -hostent</type> which is initialised by a successful call to -<function>lwres_gethostbyname_r()</function> . -<parameter>buf</parameter> is a buffer of length -<parameter>len</parameter> bytes which is used to store the -<constant>h_name</constant>, <constant>h_aliases</constant>, and -<constant>h_addr_list</constant> elements of the <type>struct -hostent</type> returned in <parameter>resbuf</parameter>. -Successful calls to <function>lwres_gethostbyname_r()</function> -return <parameter>resbuf</parameter>, -which is a pointer to the <type>struct hostent</type> it created. -</para> + <para> + Reverse lookups of addresses are performed by + <function>lwres_gethostbyaddr()</function>. + <parameter>addr</parameter> is an address of length + <parameter>len</parameter> bytes and protocol family + <parameter>type</parameter> — <type>PF_INET</type> or + <type>PF_INET6</type>. + <function>lwres_gethostbyname_r()</function> is a + thread-safe function + for forward lookups. If an error occurs, an error code is returned in + <parameter>*error</parameter>. + <parameter>resbuf</parameter> is a pointer to a + <type>struct hostent</type> which is initialised by a successful call to + <function>lwres_gethostbyname_r()</function>. + <parameter>buf</parameter> is a buffer of length + <parameter>len</parameter> bytes which is used to store the + <constant>h_name</constant>, <constant>h_aliases</constant>, and + <constant>h_addr_list</constant> elements of the + <type>struct hostent</type> returned in <parameter>resbuf</parameter>. + Successful calls to <function>lwres_gethostbyname_r()</function> + return <parameter>resbuf</parameter>, + which is a pointer to the <type>struct hostent</type> it created. + </para> -<para> -<function>lwres_gethostbyaddr_r()</function> is a thread-safe function -that performs a reverse lookup of address <parameter>addr</parameter> -which is <parameter>len</parameter> bytes long and is of protocol -family <parameter>type</parameter> — <type>PF_INET</type> or -<type>PF_INET6</type>. If an error occurs, the error code is returned -in <parameter>*error</parameter>. The other function parameters are -identical to those in <function>lwres_gethostbyname_r()</function>. -<parameter>resbuf</parameter> is a pointer to a <type>struct -hostent</type> which is initialised by a successful call to -<function>lwres_gethostbyaddr_r()</function>. -<parameter>buf</parameter> is a buffer of length -<parameter>len</parameter> bytes which is used to store the -<constant>h_name</constant>, <constant>h_aliases</constant>, and -<constant>h_addr_list</constant> elements of the <type>struct -hostent</type> returned in <parameter>resbuf</parameter>. Successful -calls to <function>lwres_gethostbyaddr_r()</function> return -<parameter>resbuf</parameter>, which is a pointer to the -<function>struct hostent()</function> it created. -</para> + <para><function>lwres_gethostbyaddr_r()</function> + is a thread-safe function + that performs a reverse lookup of address <parameter>addr</parameter> + which is <parameter>len</parameter> bytes long and is of + protocol + family <parameter>type</parameter> — <type>PF_INET</type> or + <type>PF_INET6</type>. If an error occurs, the error code is returned + in <parameter>*error</parameter>. The other function + parameters are + identical to those in <function>lwres_gethostbyname_r()</function>. + <parameter>resbuf</parameter> is a pointer to a + <type>struct hostent</type> which is initialised by a successful call to + <function>lwres_gethostbyaddr_r()</function>. + <parameter>buf</parameter> is a buffer of length + <parameter>len</parameter> bytes which is used to store the + <constant>h_name</constant>, <constant>h_aliases</constant>, and + <constant>h_addr_list</constant> elements of the + <type>struct hostent</type> returned in <parameter>resbuf</parameter>. + Successful calls to <function>lwres_gethostbyaddr_r()</function> return + <parameter>resbuf</parameter>, which is a pointer to the + <function>struct hostent()</function> it created. + </para> -</refsect1> + </refsect1> -<refsect1> -<title>RETURN VALUES</title> -<para> -The functions -<function>lwres_gethostbyname()</function>, -<function>lwres_gethostbyname2()</function>, -<function>lwres_gethostbyaddr()</function>, -and -<function>lwres_gethostent()</function> -return NULL to indicate an error. In this case the global variable -<type>lwres_h_errno</type> -will contain one of the following error codes defined in -<filename><lwres/netdb.h></filename>: + <refsect1> + <title>RETURN VALUES</title> + <para> + The functions + <function>lwres_gethostbyname()</function>, + <function>lwres_gethostbyname2()</function>, + <function>lwres_gethostbyaddr()</function>, + and + <function>lwres_gethostent()</function> + return NULL to indicate an error. In this case the global variable + <type>lwres_h_errno</type> + will contain one of the following error codes defined in + <filename><lwres/netdb.h></filename>: -<variablelist> -<varlistentry><term><constant>HOST_NOT_FOUND</constant></term> -<listitem> -<para> -The host or address was not found. -</para> -</listitem></varlistentry> -<varlistentry><term><constant>TRY_AGAIN</constant></term> -<listitem> -<para> -A recoverable error occurred, e.g., a timeout. -Retrying the lookup may succeed. -</para> -</listitem></varlistentry> -<varlistentry><term><constant>NO_RECOVERY</constant></term> -<listitem> -<para> -A non-recoverable error occurred. -</para> -</listitem></varlistentry> -<varlistentry><term><constant>NO_DATA</constant></term> -<listitem> -<para> -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. -</para> -</listitem></varlistentry> -</variablelist> -</para> + <variablelist> + <varlistentry> + <term><constant>HOST_NOT_FOUND</constant></term> + <listitem> + <para> + The host or address was not found. + </para> + </listitem> + </varlistentry> + <varlistentry> + <term><constant>TRY_AGAIN</constant></term> + <listitem> + <para> + A recoverable error occurred, e.g., a timeout. + Retrying the lookup may succeed. + </para> + </listitem> + </varlistentry> + <varlistentry> + <term><constant>NO_RECOVERY</constant></term> + <listitem> + <para> + A non-recoverable error occurred. + </para> + </listitem> + </varlistentry> + <varlistentry> + <term><constant>NO_DATA</constant></term> + <listitem> + <para> + 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. + </para> + </listitem> + </varlistentry> + </variablelist> + </para> -<para> -<citerefentry> -<refentrytitle>lwres_hstrerror</refentrytitle><manvolnum>3 -</manvolnum> -</citerefentry> -translates these error codes to suitable error messages. -</para> + <para><citerefentry> + <refentrytitle>lwres_hstrerror</refentrytitle><manvolnum>3</manvolnum> + </citerefentry> + translates these error codes to suitable error messages. + </para> -<para> -<function>lwres_gethostent()</function> -and -<function>lwres_gethostent_r()</function> -always return -<type>NULL</type>. -</para> + <para><function>lwres_gethostent()</function> + and <function>lwres_gethostent_r()</function> + always return <type>NULL</type>. + </para> -<para> -Successful calls to <function>lwres_gethostbyname_r()</function> and -<function>lwres_gethostbyaddr_r()</function> return -<parameter>resbuf</parameter>, a pointer to the <type>struct -hostent</type> that was initialised by these functions. They return -<type>NULL</type> if the lookups fail or if <parameter>buf</parameter> -was too small to hold the list of addresses and names referenced by -the <constant>h_name</constant>, <constant>h_aliases</constant>, and -<constant>h_addr_list</constant> elements of the <type>struct -hostent</type>. If <parameter>buf</parameter> was too small, both -<function>lwres_gethostbyname_r()</function> and -<function>lwres_gethostbyaddr_r()</function> set the global variable -<type>errno</type> to <errorcode>ERANGE</errorcode>. -</para> + <para> + Successful calls to <function>lwres_gethostbyname_r()</function> and + <function>lwres_gethostbyaddr_r()</function> return + <parameter>resbuf</parameter>, a pointer to the + <type>struct hostent</type> that was initialised by these functions. They return + <type>NULL</type> if the lookups fail or if <parameter>buf</parameter> + was too small to hold the list of addresses and names referenced by + the <constant>h_name</constant>, <constant>h_aliases</constant>, and + <constant>h_addr_list</constant> elements of the + <type>struct hostent</type>. + If <parameter>buf</parameter> was too small, both + <function>lwres_gethostbyname_r()</function> and + <function>lwres_gethostbyaddr_r()</function> set the global + variable + <type>errno</type> to <errorcode>ERANGE</errorcode>. + </para> -</refsect1> -<refsect1> -<title>SEE ALSO</title> -<para> -<citerefentry> -<refentrytitle>gethostent</refentrytitle><manvolnum>3</manvolnum> -</citerefentry>, + </refsect1> + <refsect1> + <title>SEE ALSO</title> + <para><citerefentry> + <refentrytitle>gethostent</refentrytitle><manvolnum>3</manvolnum> + </citerefentry>, -<citerefentry> -<refentrytitle>lwres_getipnode</refentrytitle><manvolnum>3</manvolnum> -</citerefentry>, + <citerefentry> + <refentrytitle>lwres_getipnode</refentrytitle><manvolnum>3</manvolnum> + </citerefentry>, -<citerefentry> -<refentrytitle>lwres_hstrerror</refentrytitle><manvolnum>3 -</manvolnum> -</citerefentry> -</para> -</refsect1> + <citerefentry> + <refentrytitle>lwres_hstrerror</refentrytitle><manvolnum>3</manvolnum> + </citerefentry> + </para> + </refsect1> -<refsect1> -<title>BUGS</title> -<para> -<function>lwres_gethostbyname()</function>, -<function>lwres_gethostbyname2()</function>, -<function>lwres_gethostbyaddr()</function> -and -<function>lwres_endhostent()</function> -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 -<function>lwres_gethostbyname_r()</function>, -and -<function>lwres_gethostbyaddr_r()</function> -respectively. -</para> -<para> -The resolver daemon does not currently support any non-DNS -name services such as -<filename>/etc/hosts</filename> -or -<type>NIS</type>, -consequently the above functions don't, either. -</para> -</refsect1> -</refentry> + <refsect1> + <title>BUGS</title> + <para><function>lwres_gethostbyname()</function>, + <function>lwres_gethostbyname2()</function>, + <function>lwres_gethostbyaddr()</function> + and + <function>lwres_endhostent()</function> + 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 + <function>lwres_gethostbyname_r()</function>, + and + <function>lwres_gethostbyaddr_r()</function> + respectively. + </para> + <para> + The resolver daemon does not currently support any non-DNS + name services such as + <filename>/etc/hosts</filename> + or + <type>NIS</type>, + consequently the above functions don't, either. + </para> + </refsect1> +</refentry><!-- + - Local variables: + - mode: sgml + - End: +--> |
