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Net::DNS::ZoneFile(3)	       User Contributed Perl Documentation	    Net::DNS::ZoneFile(3)

NAME
       Net::DNS::ZoneFile - DNS zone file

SYNOPSIS
	   use Net::DNS::ZoneFile;

	   $zonefile = new Net::DNS::ZoneFile( 'db.example' );

	   while ( $rr = $zonefile->read ) {
	       $rr->print;
	   }

	   @zone = $zonefile->read;

DESCRIPTION
       Each Net::DNS::ZoneFile object instance represents a zone file together with any
       subordinate files nominated using $INCLUDE directives.  Zone file syntax is defined by
       RFC1035.

       A program can have multiple zone file objects, each maintaining its own independent parser
       state information.

       The parser supports both the $TTL directive defined by RFC2308 and the BIND $GENERATE
       syntax extension.

       All RRs in a zone file must have the same class, which may be specified for the first RR
       encountered and is then propagated automatically to all subsequent records.

METHODS
   new
	   $zonefile = new Net::DNS::ZoneFile( 'db.example', ['example.com'] );

       Returns a Net::DNS::ZoneFile object which represents the zone file specified in the
       argument list.

       The file is opened for reading and remains open until exhausted or all references to the
       ZoneFile object cease to exist.

       The optional second argument specifies $ORIGIN for the zone file.

   read
	   $rr = $zonefile->read;

       When invoked in scalar context, returns the next RR encountered in the zone file, or
       undefined if end of data has been reached.

       Comments and blank lines are silently disregarded.

       $INCLUDE, $ORIGIN, $TTL and $GENERATE directives are processed transparently.

	   @rr = $zonefile->read;

       When invoked in list context, returns the list of all RR objects in the zone file.

   name
	   $filename = $zonefile->name;

       Returns the name of the zone file from which RRs will be read.  $INCLUDE directives will
       cause this to differ from the filename argument supplied when the object was created.

   line
	   $line = $zonefile->line;

       Returns the line number of the last non-continuation line encountered in the current zone
       file.

   origin
	   $origin = $zonefile->origin;

       Returns the fully qualified name of the current origin within the zone file.

   ttl
	   $ttl = $zonefile->ttl;

       Returns the default TTL as specified by the $TTL directive.

COMPATIBILITY WITH Net::DNS::ZoneFile 1.04
       Applications which depended on the Net::DNS::ZoneFile 1.04 package will continue to
       operate with minimal change using compatibility interface described below.

	   use Net::DNS::ZoneFile;

	   $listref = Net::DNS::ZoneFile->read( $filename, $include_dir );

	   $listref = Net::DNS::ZoneFile->readfh( $handle, $include_dir );

	   $listref = Net::DNS::ZoneFile->parse(  $string, $include_dir );
	   $listref = Net::DNS::ZoneFile->parse( \$string, $include_dir );

	   $_->print for @$listref;

       The optional second argument specifies the default path for filenames.  The current
       working directory is used by default.

       Although not available in the original implementation, the RR list can be obtained
       directly by calling in list context.

	   @rr = Net::DNS::ZoneFile->read( $filename, $include_dir );

   read
	   $listref = Net::DNS::ZoneFile->read( $filename, $include_dir );

       read() parses the specified zone file and returns a reference to the list of Net::DNS::RR
       objects representing the RRs in the file.  The return value is undefined if the zone data
       can not be parsed.

   readfh
	   $listref = Net::DNS::ZoneFile->readfh( $handle, $include_dir );

       read() parses data from the specified file handle and returns a reference to the list of
       Net::DNS::RR objects representing the RRs in the file.  The return value is undefined if
       the zone data can not be parsed.

   parse
	   $listref = Net::DNS::ZoneFile->parse(  $string, $include_dir );
	   $listref = Net::DNS::ZoneFile->parse( \$string, $include_dir );

       parse() interprets the argument string and returns a reference to the list of Net::DNS::RR
       objects representing the RRs.  The return value is undefined if the zone data can not be
       parsed.

ACKNOWLEDGEMENTS
       This package is designed as an improved and compatible replacement for Net::DNS::ZoneFile
       1.04 which was created by Luis Munoz in 2002 as a separate CPAN module.

       The present implementation is the result of an agreement to merge our two different
       approaches into one package integrated into Net::DNS.  The contribution of Luis Munoz is
       gratefully acknowledged.

       Thanks are also due to Willem Toorop for his constructive criticism of the initial version
       and invaluable assistance during testing.

COPYRIGHT
       Copyright (c)2011-2012 Dick Franks

       All rights reserved.

       This program is free software; you may redistribute it and/or modify it under the same
       terms as Perl itself.

SEE ALSO
       perl, Net::DNS, Net::DNS::Domain, Net::DNS::RR, RFC1035 Section 5.1, RFC2308, BIND 9
       Administrator Reference Manual

perl v5.16.3				    2012-12-28			    Net::DNS::ZoneFile(3)
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