Content-type: text/html Man page of res_init

res_init

Section: C Library Functions (3)
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NAME

res_init - Searches for a default domain name and Internet address  

LIBRARY

Standard C Library (libc.a)  

SYNOPSIS

#include <sys/types.h>

#include <netinet/in.h>

#include <arpa/nameser.h>

#include <resolv.h>

void res_init ( void );  

DESCRIPTION

The res_init() function reads the /etc/resolv.conf file for the default domain name and the Internet address of the initial hosts running the name server, even if the name server is not functioning.

The res_init() function is one of a set of subroutines that form the resolver, a set of functions that resolve domain names. All resolver functions use the /usr/include/resolv.h header file, which defines the _res data structure. The res_init() function stores domain name information in the _res data structure.  

NOTES

If the /etc/resolv.conf file does not exist, the res_init() function attempts name resolution using the local /etc/hosts file. If the system is not using a domain name server, the /etc/resolv.conf file should not exist. The /etc/host file should be present on the system even if the system is using a name server. In this instance, the file should contain the host IDs that the system requires to function even if the name server is not functioning.  

FILES

Contains the name server and domain name. Contains hostnames and their addresses for hosts in a network. This file is used to resolve a hostname into an Internet address.  

RELATED INFORMATION

Functions: dn_comp(3), dn_expand(3), dn_find(3), dn_skipname(3), _getlong(3), _getshort(3), putlong(3), putshort(3), res_mkquery(3), res_send(3) delim off


 

Index

NAME
LIBRARY
SYNOPSIS
DESCRIPTION
NOTES
FILES
RELATED INFORMATION

This document was created by man2html, using the manual pages.
Time: 02:41:00 GMT, October 02, 2010