<!DOCTYPE HTML PUBLIC "-//IETF//DTD HTML 2.0//EN"> <!--Converted with LaTeX2HTML 96.1-c (Feb 29, 1996) by Nikos Drakos (nikos@cbl.leeds.ac.uk), CBLU, University of Leeds --> <HTML> <HEAD> <TITLE>The Resolver Library</TITLE> </HEAD> <BODY LANG="EN"> <A HREF="node1.html"><IMG WIDTH=65 HEIGHT=24 ALIGN=BOTTOM ALT="contents" SRC="contents_motif.gif"></A> <BR> <B> Next:</B> <A HREF="node82.html">The host.conf File</A> <B>Up:</B> <A HREF="node80.html">Name Service and Resolver </A> <B> Previous:</B> <A HREF="node80.html">Name Service and Resolver </A> <BR> <P> <H1><A NAME="SECTION008100000">The Resolver Library</A></H1> When talking of ``the resolver'', we do not mean any special application, but rather refer to the <em>resolver library</em>, a collection of functions that can be found in the standard C library. The central routines are gethostbyname(2) and gethostbyaddr(2) which look up all IP addresses belonging to a host, and vice versa. They may be configured to simply look up the information in hosts, query a number of name servers, or use the hosts database of NIS (Network Information Service). Other applications, like smail, may include different drivers for any of these, and need special care. <HR> <UL> <LI> <A HREF="node82.html#SECTION008110000">The host.conf File</A> <LI> <A HREF="node83.html#SECTION008120000">Resolver Environment Variables</A> <LI> <A HREF="node84.html#SECTION008130000">Configuring Name Server Lookups-- resolv.conf</A> <LI> <A HREF="node85.html#SECTION008140000">Resolver Robustness</A> </UL> <BR> <HR> <P><ADDRESS> <I>Andrew Anderson <BR> Thu Mar 7 23:22:06 EST 1996</I> </ADDRESS> </BODY> </HTML>
