Perl sethostent 函数

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  描述

  sethostent 应该在第一次调用gethostent之前调用此函数。STAYOPEN参数是可选的，在大多数系统上未使用。当gethostent()检索主机数据库中下一行的信息时，然后sethostent设置（或重置）枚举到主机条目集的开头。
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  句法

  以下是此函数的简单语法-

  
  sethostent STAYOPEN
  

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  返回值

  此函数不返回任何值。
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  示例

  以下是显示其基本用法的示例代码-

   
  while( ($name, $aliases, $addrtype, $length, @addrs) = gethostent() ) {
     print "Name  = $name\n";
     print "Aliases  = $aliases\n";
     print "Addr Type  = $addrtype\n";
     print "Length  = $length\n";
     print "Addrs  = @addrs\n";
  }
  
  sethostent(1);
  
  while( ($name, $aliases, $addrtype, $length, @addrs) = gethostent() ) {
     print "Name  = $name\n";
     print "Aliases  = $aliases\n";
     print "Addr Type  = $addrtype\n";
     print "Length  = $length\n";
     print "Addrs  = @addrs\n";
  }
  
  endhostent();  # Closes the database;
  

  执行以上代码后，将产生以下结果--

  
  Name  = ip-50-62-147-141.ip.secureserver.net
  Aliases  = ip-50-62-147-141 localhost.secureserver.net localhost.localdomain localhost
  Addr Type  = 2
  Length  = 4
  Addrs  = 
  Name  = ip-50-62-147-141.ip.secureserver.net
  Aliases  = ip-50-62-147-141 localhost.secureserver.net localhost.localdomain localhost
  Addr Type  = 2
  Length  = 4
  Addrs  =