#!/usr/bin/perl
$route_rule1_ref = analyze_route ("router.txt");
$route_rule2_ref = analyze_route ("router1.txt");
sub analyze_route
{
 my ( $file ) = @_ ;
 my @router_rules = ();
 open ( R, "$file" );
 $line_count = 0;
 while ( <R> )
 {
  chomp;
  $whole_line = '';
  if ( /^O.*\s$/ && $line_count == 0 )
  {
    $first_part = $_ ;
    $line_count++ ;
  }
  elsif ( /^\s+?(\[.*)/ && $line_count == 1 )
  {
    $whole_line = $first_part.' '.$1 ;
    $line_count = 0 ;
  }
  elsif ( /^O/ )
  {
    $whole_line = $_ ;
  }
  else
  {
    $whole_line = '' ;
    $line_count = 0 ;
  }
  push ( @route_rules, $whole_line ) if $whole_line ;
 }
 close ( R );
 return \@route_rules;
}
foreach $rule ( @$route_rule1_ref )
{
  foreach $rule1 ( @$route_rule2_ref )
  {
   last if $rule eq $rule1 ;
   print "$rule\n" if ( $route_rule2_ref->[-1] eq $rule1 && $rule ne $rule1 );
  }
}
 

來源:奇科電腦Ben老師  http://www.geego.com.tw

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