home
***
CD-ROM
|
disk
|
FTP
|
other
***
search
/
Chip 2000 May
/
Chip_2000-05_cd1.bin
/
zkuste
/
Perl
/
ActivePerl-5.6.0.613.msi
/
䆊䌷䈹䈙䏵-䞅䞆䞀㡆䞃䄦䠥
/
_86ac9f955c543f04bbfd5f3a057e4e0d
< prev
next >
Wrap
Text File
|
2000-03-23
|
4KB
|
95 lines
<HTML>
<HEAD>
<TITLE>Net::protoent - by-name interface to Perl's built-in getproto* functions</TITLE>
<LINK REL="stylesheet" HREF="../../Active.css" TYPE="text/css">
<LINK REV="made" HREF="mailto:">
</HEAD>
<BODY>
<TABLE BORDER=0 CELLPADDING=0 CELLSPACING=0 WIDTH=100%>
<TR><TD CLASS=block VALIGN=MIDDLE WIDTH=100% BGCOLOR="#cccccc">
<STRONG><P CLASS=block> Net::protoent - by-name interface to Perl's built-in getproto* functions</P></STRONG>
</TD></TR>
</TABLE>
<A NAME="__index__"></A>
<!-- INDEX BEGIN -->
<UL>
<LI><A HREF="#name">NAME</A></LI><LI><A HREF="#supportedplatforms">SUPPORTED PLATFORMS</A></LI>
<LI><A HREF="#synopsis">SYNOPSIS</A></LI>
<LI><A HREF="#description">DESCRIPTION</A></LI>
<LI><A HREF="#note">NOTE</A></LI>
<LI><A HREF="#author">AUTHOR</A></LI>
</UL>
<!-- INDEX END -->
<HR>
<P>
<H1><A NAME="name">NAME</A></H1>
<P>Net::protoent - by-name interface to Perl's built-in getproto*() functions</P>
<P>
<HR>
<H1><A NAME="supportedplatforms">SUPPORTED PLATFORMS</A></H1>
<UL>
<LI>Linux</LI>
<LI>Solaris</LI>
<LI>Windows</LI>
</UL>
<HR>
<H1><A NAME="synopsis">SYNOPSIS</A></H1>
<PRE>
use Net::protoent;
$p = getprotobyname(shift || 'tcp') || die "no proto";
printf "proto for %s is %d, aliases are %s\n",
$p->name, $p->proto, "@{$p->aliases}";</PRE>
<PRE>
use Net::protoent qw(:FIELDS);
getprotobyname(shift || 'tcp') || die "no proto";
print "proto for $p_name is $p_proto, aliases are @p_aliases\n";</PRE>
<P>
<HR>
<H1><A NAME="description">DESCRIPTION</A></H1>
<P>This module's default exports override the core getprotoent(),
getprotobyname(), and <CODE>getnetbyport()</CODE> functions, replacing them with
versions that return ``Net::protoent'' objects. They take default
second arguments of ``tcp''. This object has methods that return the
similarly named structure field name from the C's protoent structure
from <EM>netdb.h</EM>; namely name, aliases, and proto. The aliases method
returns an array reference, the rest scalars.</P>
<P>You may also import all the structure fields directly into your namespace
as regular variables using the :FIELDS import tag. (Note that this still
overrides your core functions.) Access these fields as variables named
with a preceding <CODE>p_</CODE>. Thus, <CODE>$proto_obj->name()</CODE> corresponds to
$p_name if you import the fields. Array references are available as
regular array variables, so for example <CODE>@{ $proto_obj->aliases()
}</CODE> would be simply @p_aliases.</P>
<P>The <CODE>getproto()</CODE> function is a simple front-end that forwards a numeric
argument to getprotobyport(), and the rest to getprotobyname().</P>
<P>To access this functionality without the core overrides,
pass the <A HREF="../../lib/Pod/perlfunc.html#item_use"><CODE>use</CODE></A> an empty import list, and then access
function functions with their full qualified names.
On the other hand, the built-ins are still available
via the <CODE>CORE::</CODE> pseudo-package.</P>
<P>
<HR>
<H1><A NAME="note">NOTE</A></H1>
<P>While this class is currently implemented using the Class::Struct
module to build a struct-like class, you shouldn't rely upon this.</P>
<P>
<HR>
<H1><A NAME="author">AUTHOR</A></H1>
<P>Tom Christiansen</P>
<TABLE BORDER=0 CELLPADDING=0 CELLSPACING=0 WIDTH=100%>
<TR><TD CLASS=block VALIGN=MIDDLE WIDTH=100% BGCOLOR="#cccccc">
<STRONG><P CLASS=block> Net::protoent - by-name interface to Perl's built-in getproto* functions</P></STRONG>
</TD></TR>
</TABLE>
</BODY>
</HTML>