📄 ch08_162.htm
字号:
<html><head><title>Net::servent (Perl in a Nutshell, 2nd Edition)</title><link rel="stylesheet" type="text/css" href="../style/style1.css" /><meta name="DC.Creator" content="Stephen Spainhour" /><meta name="DC.Format" content="text/xml" scheme="MIME" /><meta name="DC.Language" content="en-US" /><meta name="DC.Publisher" content="O'Reilly & Associates, Inc." /><meta name="DC.Source" scheme="ISBN" content="0596002416L" /><meta name="DC.Subject.Keyword" content="stuff" /><meta name="DC.Title" content="Perl in a Nutshell, 2nd Edition" /><meta name="DC.Type" content="Text.Monograph" /></head><body bgcolor="#ffffff"><img src="gifs/smbanner.gif" usemap="#banner-map" border="0" alt="Book Home" /><map name="banner-map"><area shape="rect" coords="1,-2,616,66" href="index.htm" alt="Java and XSLT" /><area shape="rect" coords="629,-11,726,25" href="jobjects/fsearch.htm" alt="Search this book" /></map><div class="navbar"><table width="684" border="0"><tr><td align="left" valign="top" width="228"><a href="ch08_161.htm"><img src="../gifs/txtpreva.gif" alt="Previous" border="0" /></a></td><td align="center" valign="top" width="228" /><td align="right" valign="top" width="228"><a href="ch08_163.htm"><img src="../gifs/txtnexta.gif" alt="Next" border="0" /></a></td></tr></table></div><h2 class="sect1">8.162. Net::servent</h2><p><a name="INDEX-1518" />Returns information for an Internetservice. Overrides the core <tt class="literal">getservent</tt>,<tt class="literal">getservbyname</tt>, and<tt class="literal">getservbyport</tt> functions, replacing them withversions that return Net::servent objects. The functions take adefault second argument of <tt class="literal">tcp</tt>. The objects havemethods that return the fields of the same name from the<em class="emphasis">servent</em> structure in<em class="emphasis">netdb.h</em>:</p><a name="ch08-473-fm2xml" /><table border="1" cellpadding="3"><tr><th><p>Field</p></th><th><p>Description</p></th></tr><tr><td><p><tt class="literal">aliases</tt></p></td><td><p>List of aliases</p></td></tr><tr><td><p><tt class="literal">name</tt></p></td><td><p>Name of service</p></td></tr><tr><td><p><tt class="literal">port</tt></p></td><td><p>Port</p></td></tr><tr><td><p><tt class="literal">proto</tt></p></td><td><p>Protocol to use</p></td></tr></table><p><p>You can access the structure fields with the methods or by importingthe fields into your namespace with the :FIELDS import tag andaccessing them by prepending <tt class="literal">s_</tt> to the field name:</p><blockquote><pre class="code">$serv_obj->name( )$s_name</pre></blockquote><div class="refentry"><table width="515" border="0" cellpadding="5"><tr><td align="left"><font size="+1"><b>getserv</b></font></td><td align="right"><i></i></td></tr></table><hr width="515" size="3" noshade="true" align="left" color="black" /><pre>getserv(<em class="replaceable">service</em>)</pre><p>Frontend for <tt class="literal">getservbyport</tt> and<tt class="literal">getservbyname</tt>. If<em class="replaceable"><tt>service</tt></em> is numeric, calls<tt class="literal">getservbyport</tt>; otherwise, calls<tt class="literal">getservbyname</tt>.</p></div><div class="refentry"><table width="515" border="0" cellpadding="5"><tr><td align="left"><font size="+1"><b>getservbyname</b></font></td><td align="right"><i></i></td></tr></table><hr width="515" size="3" noshade="true" align="left" color="black" /><pre>getservbyname(<em class="replaceable">name</em>)</pre><p>Returns information for the Internet service with protocol name<em class="replaceable"><tt>name</tt></em>.</p></div><div class="refentry"><table width="515" border="0" cellpadding="5"><tr><td align="left"><font size="+1"><b>getservbyport</b></font></td><td align="right"><i></i></td></tr></table><hr width="515" size="3" noshade="true" align="left" color="black" /><pre>getservbyport(<em class="replaceable">port</em>)</pre><p>Returns information for the Internet service with port number<em class="replaceable"><tt>port</tt></em>.</p></div><div class="refentry"><table width="515" border="0" cellpadding="5"><tr><td align="left"><font size="+1"><b>getservent</b></font></td><td align="right"><i></i></td></tr></table><hr width="515" size="3" noshade="true" align="left" color="black" /><pre>getservent</pre><p>Returns entries from the database of Internet services.</p></div><hr width="684" align="left" /><div class="navbar"><table width="684" border="0"><tr><td align="left" valign="top" width="228"><a href="ch08_161.htm"><img src="../gifs/txtpreva.gif" alt="Previous" border="0" /></a></td><td align="center" valign="top" width="228"><a href="index.htm"><img src="../gifs/txthome.gif" alt="Home" border="0" /></a></td><td align="right" valign="top" width="228"><a href="ch08_163.htm"><img src="../gifs/txtnexta.gif" alt="Next" border="0" /></a></td></tr><tr><td align="left" valign="top" width="228">8.161. Net::protoent</td><td align="center" valign="top" width="228"><a href="index/index.htm"><img src="../gifs/index.gif" alt="Book Index" border="0" /></a></td><td align="right" valign="top" width="228">8.163. Net::SMTP</td></tr></table></div><hr width="684" align="left" /><img src="../gifs/navbar.gif" usemap="#library-map" border="0" alt="Library Navigation Links" /><p><p><font size="-1"><a href="copyrght.htm">Copyright © 2002</a> O'Reilly & Associates. All rights reserved.</font></p><map name="library-map"><area shape="rect" coords="1,0,85,94" href="../index.htm"><area shape="rect" coords="86,1,178,103" href="../lwp/index.htm"><area shape="rect" coords="180,0,265,103" href="../lperl/index.htm"><area shape="rect" coords="267,0,353,105" href="../perlnut/index.htm"><area shape="rect" coords="354,1,446,115" href="../prog/index.htm"><area shape="rect" coords="448,0,526,132" href="../tk/index.htm"><area shape="rect" coords="528,1,615,119" href="../cookbook/index.htm"><area shape="rect" coords="617,0,690,135" href="../pxml/index.htm"></map></body></html>⌨️ 快捷键说明
复制代码
Ctrl + C
搜索代码
Ctrl + F
全屏模式
F11
切换主题
Ctrl + Shift + D
显示快捷键
?
增大字号
Ctrl + =
减小字号
Ctrl + -