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#!/usr/bin/perl
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#
# Flexible MRTG index page
#
# Based on original work done by mick@lowdown.com, mostly rewritten
# by Hamish@zot.org
#
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# (c) 1997, Mick Ghazey mick@lowdown.com
# Thanks to Dave Rand, Peter W. Osel and Tobias Oetiker.
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#
# Requires the CGI package (in mandriva this is perl-CGI)

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our $VERSION=3;
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use strict;
use warnings;
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use CGI ':all';
use CGI::Carp qw(fatalsToBrowser);
use Sys::Hostname;

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my @config_files = (
'/etc/mrtg.cfg',
'/usr/share/WWW/mrtg/mrtg.cfg',
);

# FIXME - globals
my $gifdone = 0; # Scan for newest graph and save info for later
my $warnings;

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sub init_tests(@) {
my (@config_files) = @_;

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my $xsize_default = 500;
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my $ysize_default = 135;

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my $testmax=0;
my @list;
my %tests;

while(@config_files > 0){
my $cfg;

if (!open(In, $cfg = shift @config_files) ) {
$warnings .= "Warning: Could not open $cfg file\n";
next;
}

while(<In>){

#TODO - parse WorkDir: directives
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#TODO - instantiate new tests from the "_" defaults
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if ( $_ =~ /^([^#[][^[]+)\[(.*)\]:\s*(.+)$/ ) {
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my $testnr;
my $var=lc $1;
my $testname=lc $2;
my $val=$3;

my $this_ysize;
my $this_xsize;
my $this_title;

if ( $var eq 'ysize' ) {
$this_ysize = $val +35;
} elsif ( $var eq 'xsize' ) {
$this_xsize = $val +100;
} elsif ( $var eq 'title' ) {
$this_title = $val;
}

# Skip any default initializers
if ($testname eq '_') {
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# FIXME - quick-hack
if($this_xsize) {
$xsize_default = $this_xsize;
}
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next;
}
if ($testname eq '^') {
next;
}
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if (! exists $tests{$testname}) {
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# initialize
$list[$testmax]->{xsize} = $xsize_default;
$list[$testmax]->{ysize} = $ysize_default;

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$tests{$testname}=$testmax;
$list[$testmax]->{name} = $testname;
$testnr = $testmax;
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# TODO - replace testmax with (scalar @list)
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$testmax++;
} else {
$testnr=$tests{$testname};
}

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$list[$testnr]->{ysize} = $this_ysize if $this_ysize;
$list[$testnr]->{xsize} = $this_xsize if $this_xsize;
$list[$testnr]->{title} = $this_title if $this_title;
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}
}
close In;
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}
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# check and update details for all known tests;
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for my $i (@list) {
my $testname = $i->{name};
if (!exists($i->{title})) {
$i->{title}='UNTITLED';
}

# Default is GIF, unless a PNG file exists
$i->{imagetype} = 'gif';
if ( -e "$testname-day.png" ) {
$i->{imagetype} = "png";
}

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# TODO - change the filename based on the displayed period
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my $filename = $testname . "-day." . $i->{imagetype};
my ($dev, $ino, $mode, $nlink, $uid, $gid, $rdev, $size,
$atime,$mtime,$ctime,$blksize,$blocks)
= stat($filename);
if (!defined $mtime) {
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# if we cannot stat the file, skip it
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next;
}

$i->{mtime} = $mtime;

# find the newest file
if ($mtime > $gifdone) {
$gifdone = $mtime;
}
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}
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return @list;
}

sub init_lists(@) {
my (@tests) = @_;

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my $l;
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my %hostlist;
my %hosttypelist;
my %hosttypecount;

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@{$l->{ALL}->{ALL}}=@tests;
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for my $i (0..$#tests) {
my $testname = $tests[$i]->{name};

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# Do not classify any test with no separators in it
if ($testname !~ /,/) {
push @{$l->{OTHER}->{OTHER}}, $tests[$i];
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next;
}

my ($group,$host,$test) = split ',', $testname;

if (defined $group) {
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push @{$l->{GROUP}->{$group}}, $tests[$i];
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}
if (defined $host) {
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push @{$l->{HOST}->{$host}}, $tests[$i];
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}
if (defined $test) {
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push @{$l->{TEST}->{$test}}, $tests[$i];
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}

# TODO - this needs to have a better way...
# hosttype is the non digit hostname prefix - thus
# "proxy-1" and "proxy-2" would both end up in the
# "proxy-" hosttype
if ($host =~ m/^(.*[^0-9])(\d+)$/) {
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my $hosttype = $1.'*';
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# count each host only once
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if (!defined $hostlist{$host}) {
$hostlist{$host}=1;
$hosttypecount{$hosttype}++;
}

push @{$hosttypelist{$hosttype}}, $tests[$i];
}
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}

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for my $i (keys %hosttypelist) {
if ($hosttypecount{$i} >1) {
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push @{$l->{TYPE}->{$i}}, @{$hosttypelist{$i}};
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}
}
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return $l;
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}

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sub print_menu_table($$$$) {
my ($lists,$style,$target,$page) = @_;
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print "\n<table border=2 cellpadding=2 cellspacing=0 style=\"margin: 1em 1em 1em 0; background: #f9f9f9; border: 1px #aaa solid; border-collapse: collapse; font-size: 95%;\">\n";

if ($style eq 'wide') {
print "<tr>\n";

# print headings
for my $i (sort keys %{$lists}) {
print "<th>$i</th>\n";
}

print "</tr>";
}
if ($style eq 'wide') {
print "<tr>\n";
}

# print contents
for my $i (sort keys %{$lists}) {
if ($style eq 'high') {
print "<tr><th>$i</tr>\n";
print "<tr>";
}
print " <td valign=top>\n";
for my $j (sort keys %{$lists->{$i}}) {
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print " ".a({-href=>"?page=$page&list=$i,$j",-target=>$target},"$j")."<br>\n";
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}
print " </td>\n";

if ($style eq 'high') {
print "</tr>\n";
}
}

if ($style eq 'wide') {
print "</tr>";
}

print "</table>\n";
}

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sub print_treemenu($) {
my ($lists) = @_;

print "USETEXTLINKS = 1\n";
print "STARTALLOPEN = 0\n";
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print "HIGHLIGHT = 1\n";
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print "ICONPATH = ''\n";
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print 'foldersTree = gFld("<i>MRTG Tree</i>", "javascript:parent.op()")',"\n";
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print 'foldersTree.treeID = "Frameset"',"\n";
# print contents
for my $i (sort keys %{$lists}) {

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print "m$i = insFld(foldersTree, gFld(\"$i\", \"javascript:parent.op()\"))\n";
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for my $j (sort keys %{$lists->{$i}}) {
print "insDoc(m$i, gLnk(\"R\", \"$j\", \"?page=list&list=$i,$j\"))\n";
}
}
}

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sub print_list($$$) {
my ($lists,$graph,$list) = @_;

if (!defined $list) {
return undef;
}
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if (!defined $lists) {
return undef;
}
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my @wantlist = split /,/,$list;

my @list = @{$lists->{$wantlist[0]}->{$wantlist[1]}};

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for my $router_num (0..$#list){
my $router = $list[$router_num];
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# FIXME - what if mtime is undef?
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my $time = localtime $router->{mtime}; # $st_mtime saved in above loop
($time) = $time =~ /(\d+:\d+:\d+)/; # Just the time

print "$time <b>$router->{title}</b><br/>";

my ($ysize, $xsize);
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$ysize = $router->{ysize};
$xsize = $router->{xsize};

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print a({-href=>$router->{name}.".html",-target=>"basefrm"},
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img{
-src=>$router->{name}."-$graph.".$router->{imagetype},
-height=>"$ysize",
-width=>"$xsize"
}
);
print hr,"\n";
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}
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return 1;
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}

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sub print_graph_chooser($$$$) {
my ($this_graph,$list,$page,$changepage) = @_;
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my $selfurl = "?page=$page&list=$list&";
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if ($this_graph eq 'day') {
print 'Daily';
} else {
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print a({-href=>$selfurl.'graph=day',-target=>'_self'}, 'Daily');
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}
print '&nbsp;';
if ($this_graph eq 'week') {
print 'Weekly';
} else {
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print a({-href=>$selfurl.'graph=week',-target=>'_self'}, 'Weekly')
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}
print '&nbsp;';
if ($this_graph eq 'month') {
print 'Monthly';
} else {
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print a({-href=>$selfurl.'graph=month',-target=>'_self'}, 'Monthly')
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}
print '&nbsp;';
if ($this_graph eq 'year') {
print 'Yearly';
} else {
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print a({-href=>$selfurl.'graph=year',-target=>'_self'}, 'Yearly')
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}
print '&nbsp;';

print '&nbsp;';
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if (defined $changepage) {
print a({-href=>"?page=$changepage"}, 'Change List'), '&nbsp;';
}
print '(This List is ',param('list'),")\n";
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}

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my $page = param('page') || 'treeview';
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my $this_host = hostname;
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my @tests;
my $lists;

if($page eq 'frame') {
print "Content-type: text/html\n\n";
print "<html><head><title>$this_host MRTG Index (V$VERSION)</title></head>\n";
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print '<frameset cols="200,*">';
print '<frame src="?page=menu" name=treeframe>';
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print '<frame src="?page=list&list=" name=basefrm>';
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print "</frameset>\n";
print "</html>\n";

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} elsif($page eq 'treeview') {
print "Content-type: text/html\n\n";
print "<html><head><title>$this_host MRTG Index (V$VERSION)</title></head>\n";
print "<script>\n";
print "function op() { }\n";
print "</script>\n";
print '<frameset cols="200,*">'; # FIXME onresize if navigator.family==nn4
print '<frame src="?page=treemenu" name=treeframe>';
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print '<frame src="javascript:parent.op()" name=basefrm>';
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print "</frameset>\n";
print "</html>\n";
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} elsif($page eq 'list') {
print header,
start_html(-TITLE=>"$this_host MRTG Index (V$VERSION)", -BGCOLOR=>'#e6e6e6'),
"\n";

@tests = init_tests(@config_files);
$lists = init_lists(@tests);

# Time the next update to occur a little while after the next interval completes
my $interval = 300; # 5 min update interval
my $guardband = 15; # updates occur this many seconds after predicted gif completion
my $refresh = $interval + $guardband + $gifdone - time; # predict how long until next update
$refresh = $interval if $refresh <= $guardband;
my $expires = gmtime (time + $interval * 2 + $guardband);
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my $list = param('list');
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my $graph = param('graph') || 'day';
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print
"<meta http-equiv=\"expires\" content=\"$expires GMT\">\n",
"<meta http-equiv=\"refresh\" content=$refresh>\n";
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if ($list) {
print_graph_chooser($graph,$list,$page,'none');
print "<br/>";
print_list($lists,$graph,$list);
}
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print end_html;
} elsif($page eq 'menu') {
print header,
start_html(-TITLE=>"$this_host MRTG Index (V$VERSION)", -BGCOLOR=>'#e6e6e6'),
"\n";

@tests = init_tests(@config_files);
$lists = init_lists(@tests);
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print_menu_table($lists,'high','basefrm','list');
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print end_html;
} elsif($page eq 'treemenu') {
print header,
start_html(-TITLE=>"$this_host MRTG Index (V$VERSION)", -BGCOLOR=>'#e6e6e6'),
"\n";

@tests = init_tests(@config_files);
$lists = init_lists(@tests);
print '<script src="ua.js"></script>';
print '<script src="ftiens4.js"></script>';
print '<script>';
print_treemenu($lists);
print '</script>';
print '<DIV style="position:absolute; top:0; left:0;"><TABLE border=0><TR><TD><FONT size=-2><A style="font-size:7pt;text-decoration:none;color:silver" href="http://www.treemenu.net/" target=_blank>Javascript Tree Menu</A></FONT></TD></TR></TABLE></DIV>';
print '<script>initializeDocument()</script>';
print '<NOSCRIPT>A tree for site navigation will open here if you enable JavaScript in your browser.</NOSCRIPT>';
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print hr;
print a({-href=>"?page=none",-target=>"_top"}, "Old menu");
print br;
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print a({-href=>"?page=noframe",-target=>"_top"}, "No frames");
print br;
print a({-href=>"?page=frame",-target=>"_top"}, "Basic frames");
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print end_html;
} elsif($page eq 'noframe') {
print header,
start_html(-TITLE=>"$this_host MRTG Index (V$VERSION)", -BGCOLOR=>'#e6e6e6'),
"\n";

@tests = init_tests(@config_files);
$lists = init_lists(@tests);

# FIXME - duplicated time calculations from above
# Time the next update to occur a little while after the next interval completes
my $interval = 300; # 5 min update interval
my $guardband = 15; # updates occur this many seconds after predicted gif completion
my $refresh = $interval + $guardband + $gifdone - time; # predict how long until next update
$refresh = $interval if $refresh <= $guardband;
my $expires = gmtime (time + $interval * 2 + $guardband);
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my $list = param('list');
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my $graph = param('graph') || 'day';
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print
"<meta http-equiv=\"expires\" content=\"$expires GMT\">\n",
"<meta http-equiv=\"refresh\" content=$refresh>\n";

print "<table cellpadding=2 cellspacing=0>\n";

print "<tr><td valign=top>";
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print_menu_table($lists,'high','_self','noframe');
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print "<td valign=top>\n";
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if ($list) {
print_graph_chooser($graph,$list,$page,'noframe');
print "<br/>";
print_list($lists,$graph,param('list'));
}
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print "</table>\n";
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print end_html;
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} elsif($page eq 'none') {
print header,
start_html(-TITLE=>"$this_host MRTG Index (V$VERSION)", -BGCOLOR=>'#e6e6e6'),
"\n";

@tests = init_tests(@config_files);
$lists = init_lists(@tests);
print table(
{-width=>"100\%"},
TR(td("Select which list to show"))
);
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print_menu_table($lists,'wide','_self','list');
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print "\n","Direct questions and feedback to ",
a({-href=>"mailto:hamish\@zot.org"}, "Hamish"),
" (Version $VERSION)",
end_html;

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}
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if ($warnings && param('debug')) {
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print "<pre>\n", "$warnings", "</pre>\n";
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}