Commit | Line | Data |
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431fbb12 | 1 | #! /usr/bin/perl -W |
0bd5c08c | 2 | # |
431fbb12 TH |
3 | # checkmail Version 0.3 by Thomas Hochstein |
4 | # | |
5 | # This script tries to verify the deliverability of (a) mail address(es). | |
6 | # | |
7 | # Copyright (c) 2002-2010 Thomas Hochstein <thh@inter.net> | |
0bd5c08c | 8 | # |
431fbb12 TH |
9 | # It can be redistributed and/or modified under the same terms under |
10 | # which Perl itself is published. | |
11 | ||
12 | our $VERSION = "0.3"; | |
13 | ||
14 | ################################# Configuration ################################ | |
15 | # Please fill in a working configuration! | |
16 | my %config=( | |
17 | # value used for HELO/EHLO - a valid hostname you own | |
18 | helo => 'testhost.domain.example', | |
19 | # value used for MAIL FROM: - a valid address under your control | |
20 | from => 'mailtest@testhost.domain.example', | |
21 | # a syntactically valid "random" - reliably not existing - localpart | |
22 | rand => 'ZOq62fow1i' | |
23 | ); | |
24 | ||
25 | ################################### Modules #################################### | |
26 | use strict; | |
27 | use File::Basename; | |
0bd5c08c TH |
28 | use Getopt::Std; |
29 | use Net::DNS; | |
30 | use Net::SMTP; | |
31 | ||
431fbb12 TH |
32 | ################################# Main program ################################# |
33 | ||
34 | $Getopt::Std::STANDARD_HELP_VERSION = 1; | |
35 | my $myself = basename($0); | |
36 | ||
37 | # read commandline options | |
0bd5c08c | 38 | my %options; |
431fbb12 TH |
39 | getopts('Vhqlrf:m:', \%options); |
40 | ||
41 | # -V: display version | |
42 | if ($options{'V'}) { | |
43 | print "$myself v $VERSION\nCopyright (c) 2010 Thomas Hochstein <thh\@inter.net>\n"; | |
44 | print "This program is free software; you may redistribute it and/or modify it under the same terms as Perl itself.\n"; | |
45 | exit(100); | |
46 | }; | |
47 | ||
48 | # -h: feed myself to perldoc | |
49 | if ($options{'h'}) { | |
50 | exec('perldoc', $0); | |
51 | exit(100); | |
52 | }; | |
53 | ||
54 | # display usage information if neither -f nor an address are present | |
55 | if (!$options{'f'} and !$ARGV[0]) { | |
56 | print "Usage: $myself [-hqlr] [-m <host>] <address>|-f <file>\n"; | |
57 | print "Options: -V display copyright and version\n"; | |
58 | print " -h show documentation\n"; | |
59 | print " -q quiet (no output, just exit with 0/1/2/3)\n"; | |
60 | print " -l extended logging\n"; | |
61 | print " -r test random address to verify verification\n"; | |
62 | print " -m <host> no DNS lookup, just test this host\n"; | |
63 | print " <address> mail address to check\n\n"; | |
64 | print " -f <file> parse file (one address per line)\n"; | |
65 | exit(100); | |
0bd5c08c TH |
66 | }; |
67 | ||
431fbb12 TH |
68 | # -f: open file and read addresses to @adresses |
69 | my @addresses; | |
0bd5c08c TH |
70 | if ($options{'f'}) { |
71 | if (-e $options{'f'}) { | |
431fbb12 | 72 | open FILE, "<$options{'f'}" or die("$myself ERROR: Could not open file $options{'f'} for reading: $!"); |
0bd5c08c | 73 | } else { |
431fbb12 | 74 | die("$myself ERROR: File $options{'f'} does not exist!\n"); |
0bd5c08c | 75 | }; |
0bd5c08c TH |
76 | while(<FILE>) { |
77 | chomp; | |
431fbb12 | 78 | push(@addresses,$_); |
0bd5c08c TH |
79 | }; |
80 | close FILE; | |
431fbb12 TH |
81 | # fill @adresses with single address to check |
82 | } else { | |
83 | push(@addresses,$ARGV[0]); | |
84 | }; | |
85 | ||
86 | # loop over each address and test it | |
87 | my (%targets,$curstat,$status,$log,$message); | |
88 | foreach (@addresses) { | |
89 | my $address = $_; | |
90 | (undef,my $domain) = splitaddress($address); | |
91 | printf(" * Testing %s ...\n",$address) if !($options{'q'}); | |
92 | $log .= "\n===== BEGIN $address =====\n"; | |
93 | # get list of target hosts or take host forced via -m | |
94 | if (!$options{'m'}) { | |
95 | %targets = %{gettargets($domain,\$log)}; | |
96 | } else { | |
97 | $message = sprintf("Connection to %s forced by -m.\n",$options{'m'}); | |
98 | $log .= $message; | |
99 | print " $message" if !($options{'q'}); | |
100 | # just one target host with preference 0 | |
101 | $targets{$options{'m'}} = 0; | |
102 | }; | |
103 | if (%targets) { | |
104 | $curstat = checkaddress($address,\%targets,\$log); | |
105 | } else { | |
106 | $curstat = 2; | |
107 | $message = 'DNS lookup failure'; | |
108 | printf(" > Address is INVALID (%s).\n",$message) if !($options{'q'}); | |
109 | $log .= $message . '.'; | |
110 | }; | |
111 | $log .= "====== END $address ======\n"; | |
112 | $status = $curstat if (!defined($status) or $curstat > $status); | |
0bd5c08c TH |
113 | }; |
114 | ||
115 | print $log if ($options{'l'}); | |
116 | ||
117 | # status 0: valid / batch processing | |
431fbb12 TH |
118 | # 1: connection failed or temporary failure |
119 | # 2: invalid | |
120 | # 3: cannot verify | |
121 | #D print "\n-> EXIT $status\n"; | |
0bd5c08c TH |
122 | exit($status); |
123 | ||
431fbb12 TH |
124 | ################################## gettargets ################################## |
125 | # get mail exchanger(s) or A record(s) for a domain | |
126 | # IN : $domain: domain to query the DNS for | |
127 | # OUT: \%targets: reference to a hash containing a list of target hosts | |
128 | sub gettargets { | |
129 | my ($domain,$logr) = @_; | |
130 | # resolver objekt | |
131 | my $resolver = Net::DNS::Resolver->new(udp_timeout => 15, tcp_timeout => 15); | |
0bd5c08c | 132 | |
431fbb12 TH |
133 | my %targets; |
134 | # get MX record(s) as a list sorted by preference | |
135 | if (my @mxrr = mx($resolver,$domain)) { | |
136 | print_dns_result($domain,'MX',scalar(@mxrr),undef,$logr); | |
137 | foreach my $rr (@mxrr) { | |
138 | $targets{$rr->exchange} = $rr->preference; | |
139 | $$logr .= sprintf("(%d) %s\n",$rr->preference,$rr->exchange); | |
140 | }; | |
141 | # no MX record found; log and try A record(s) | |
142 | } else { | |
143 | print_dns_result($domain,'MX',undef,$resolver->errorstring,$logr); | |
144 | print(" Falling back to A record ...\n") if !($options{'q'}); | |
145 | # get A record(s) | |
146 | if (my $query = $resolver->query($domain,'A','IN')) { | |
147 | print_dns_result($domain,'A',$query->header->ancount,undef,$logr); | |
148 | foreach my $rr ($query->answer) { | |
149 | $targets{$rr->address} = 0; | |
150 | $$logr .= sprintf("- %s\n",$rr->address); | |
151 | }; | |
152 | # no A record found either; log and fail | |
153 | } else { | |
154 | print_dns_result($domain,'A',undef,$resolver->errorstring,$logr); | |
155 | printf(" %s has neither MX nor A records - mail cannot be delivered.\n",$domain) if !($options{'q'}); | |
156 | }; | |
0bd5c08c | 157 | }; |
431fbb12 TH |
158 | return \%targets; |
159 | }; | |
160 | ||
161 | ################################# checkaddress ################################# | |
162 | # test address for deliverability | |
163 | # IN : $address: adress to be tested | |
164 | # \%targets: reference to a hash containing a list of MX hosts | |
165 | # \$log : reference to the log (to be printed out via -l) | |
166 | # OUT: --- | |
167 | # \$log will be changed | |
168 | sub checkaddress { | |
169 | my ($address,$targetsr,$logr) = @_; | |
170 | my %targets = %{$targetsr}; | |
171 | my $status; | |
172 | # walk %targets in order of preference | |
173 | foreach my $host (sort { $targets{$a} <=> $targets{$b} } keys %targets) { | |
174 | printf(" / Trying %s (%s) with %s\n",$host,$targets{$host} || 'A',$address) if !($options{'q'}); | |
175 | $$logr .= sprintf("%s:\n%s\n",$host,"-" x (length($host)+1)); | |
176 | $status = checksmtp($address,$host,$logr); | |
177 | last if ($status != 1); | |
0bd5c08c | 178 | }; |
431fbb12 | 179 | return $status; |
0bd5c08c TH |
180 | }; |
181 | ||
431fbb12 TH |
182 | ################################### checksmtp ################################## |
183 | # connect to a remote machine on port 25 and test deliverability of a mail | |
184 | # address by doing the SMTP dialog until RCPT TO stage | |
185 | # IN : $address: address to test | |
186 | # $target : target host | |
187 | # \$log : reference to the log (to be printed out via -l) | |
188 | # OUT: .........: reference to a hash containing a list of target hosts | |
189 | # \$log will be changed | |
0bd5c08c | 190 | sub checksmtp { |
431fbb12 TH |
191 | my ($address,$target,$logr) = @_; |
192 | my ($status); | |
193 | # start SMTP connection | |
194 | if (my $smtp = Net::SMTP->new($target,Hello => $config{'helo'},Timeout => 30)) { | |
195 | $$logr .= $smtp->banner; # Net::SMTP doesn't seem to support multiline greetings. | |
196 | $$logr .= "EHLO $config{'helo'}\n"; | |
197 | log_smtp_reply($logr,$smtp->code,$smtp->message); | |
198 | $smtp->mail($config{'from'}); | |
199 | $$logr .= "MAIL FROM:<$config{'from'}>\n"; | |
200 | log_smtp_reply($logr,$smtp->code,$smtp->message); | |
201 | # test address | |
202 | my ($success,$code,@message) = try_rcpt_to(\$smtp,$address,$logr); | |
203 | # connection failure? | |
204 | if ($success < 0) { | |
205 | $status = connection_failed(); | |
206 | # delivery attempt was successful? | |
207 | } elsif ($success) { | |
208 | # -r: try random address (which should be guaranteed to be invalid) | |
209 | if ($options{'r'}) { | |
210 | (undef,my $domain) = splitaddress($address); | |
211 | my ($success,$code,@message) = try_rcpt_to(\$smtp,$config{'rand'}.'@'.$domain,$logr); | |
212 | # connection failure? | |
213 | if ($success < 0) { | |
214 | $status = connection_failed(); | |
215 | # verification impossible? | |
216 | } elsif ($success) { | |
217 | $status = 3; | |
218 | print " > Address verificaton impossible. You'll have to send a test mail ...\n" if !($options{'q'}); | |
219 | } | |
220 | } | |
221 | # if -r is not set or status was not set to 3: valid address | |
222 | if (!defined($status)) { | |
223 | $status = 0; | |
224 | print " > Address is valid.\n" if !($options{'q'}); | |
0bd5c08c | 225 | }; |
431fbb12 TH |
226 | # delivery attempt failed? |
227 | } else { | |
228 | $status = 2; | |
229 | print " > Address is INVALID:\n" if !($options{'q'}); | |
230 | print ' ' . join(' ',@message) if !($options{'q'}); | |
231 | } | |
232 | # terminate SMTP connection | |
233 | $smtp->quit; | |
234 | $$logr .= "QUIT\n"; | |
235 | log_smtp_reply($logr,$smtp->code,$smtp->message); | |
0bd5c08c | 236 | } else { |
431fbb12 TH |
237 | # SMTP connection failed / timeout |
238 | $status = connection_failed(); | |
239 | $$logr .= "---Connection failure---\n"; | |
0bd5c08c | 240 | }; |
431fbb12 TH |
241 | return $status; |
242 | } | |
243 | ||
244 | ################################# splitaddress ################################# | |
245 | # split mail address into local and domain part | |
246 | # IN : $address: a mail address | |
247 | # OUT: $local : local part | |
248 | # $domain: domain part | |
249 | sub splitaddress { | |
250 | my($address)=@_; | |
251 | (my $lp = $address) =~ s/^([^@]+)@.*/$1/; | |
252 | (my $domain = $address) =~ s/[^@]+\@(\S*)$/$1/; | |
253 | return ($lp,$domain); | |
254 | }; | |
255 | ||
256 | ################################ parse_dns_reply ############################### | |
257 | # parse DNS response codes and return code and description | |
258 | # IN : $response: a DNS response code | |
259 | # OUT: "$response ($desciption)" | |
260 | sub parse_dns_reply { | |
261 | my($response)=@_; | |
262 | my %dnsrespcodes = (NOERROR => 'empty response', | |
263 | NXDOMAIN => 'non-existent domain', | |
264 | SERVFAIL => 'DNS server failure', | |
265 | REFUSED => 'DNS query refused', | |
266 | FORMERR => 'format error', | |
267 | NOTIMP => 'not implemented'); | |
268 | if(defined($dnsrespcodes{$response})) { | |
269 | return sprintf('%s (%s)',$response,$dnsrespcodes{$response}); | |
270 | } else { | |
271 | return $response; | |
272 | }; | |
273 | }; | |
274 | ||
275 | ############################### print_dns_result ############################### | |
276 | # print and log result of DNS query | |
277 | # IN : $domain: domain the DNS was queried for | |
278 | # $type : record type (MX, A, ...) | |
279 | # $count : number of records found | |
280 | # $error : DNS response code | |
281 | # \$log : reference to the log (to be printed out via -l) | |
282 | # OUT: --- | |
283 | # \$log will be changed | |
284 | sub print_dns_result { | |
285 | my ($domain,$type,$count,$error,$logr) = @_; | |
286 | if (defined($count)) { | |
287 | printf(" %d %s record(s) found for %s\n",$count,$type,$domain) if !($options{'q'}); | |
288 | $$logr .= sprintf("%s DNS record(s):\n",$type); | |
289 | } else { | |
290 | printf(" No %s records found for %s: %s\n",$type,$domain,parse_dns_reply($error)) if !($options{'q'}); | |
291 | $$logr .= sprintf("No %s records found: %s\n",$type,parse_dns_reply($error)); | |
292 | }; | |
293 | return; | |
0bd5c08c TH |
294 | }; |
295 | ||
431fbb12 TH |
296 | ################################## try_rcpt_to ################################# |
297 | # send RCPT TO and return replies | |
298 | # IN : \$smtp : a reference to an SMTP object | |
299 | # $recipient: a mail address | |
300 | # \$log : reference to the log (to be printed out via -l) | |
301 | # OUT: $success: true or false | |
302 | # $code : SMTP status code | |
303 | # $message: SMTP status message | |
304 | # \$log will be changed | |
305 | sub try_rcpt_to { | |
306 | my($smtpr,$recipient,$logr)=@_; | |
307 | $$logr .= sprintf("RCPT TO:<%s>\n",$recipient); | |
308 | my $success = $$smtpr->to($recipient); | |
309 | if ($$smtpr->code) { | |
310 | log_smtp_reply($logr,$$smtpr->code,$$smtpr->message); | |
311 | } else { | |
312 | $success = -1; | |
313 | $$logr .= "---Connection failure---\n"; | |
314 | }; | |
315 | return ($success,$$smtpr->code,$$smtpr->message); | |
316 | }; | |
317 | ||
318 | ################################ log_smtp_reply ################################ | |
319 | # log result of SMTP command | |
320 | # IN : \$log : reference to the log (to be printed out via -l) | |
321 | # $code : SMTP status code | |
322 | # @message : SMTP status message | |
323 | # OUT: --- | |
324 | # \$log will be changed | |
325 | sub log_smtp_reply { | |
326 | my($logr,$code,@message)=@_; | |
327 | $$logr .= sprintf('%s %s',$code,join('- ',@message)); | |
328 | return; | |
0bd5c08c TH |
329 | } |
330 | ||
431fbb12 TH |
331 | ############################## connection_failed ############################### |
332 | # print failure message and return status 1 | |
333 | # OUT: 1 | |
334 | sub connection_failed { | |
335 | print " > Connection failure.\n" if !($options{'q'}); | |
336 | return 1; | |
337 | } | |
32301d53 TH |
338 | |
339 | __END__ | |
340 | ||
341 | ################################ Documentation ################################# | |
342 | ||
343 | =head1 NAME | |
344 | ||
345 | checkmail - check deliverability of a mail address | |
346 | ||
347 | =head1 SYNOPSIS | |
348 | ||
349 | B<checkmail> [B<-Vhqlr>] [B<-m> I<host>] I<address>|B<-f> I<file> | |
350 | ||
351 | =head1 REQUIREMENTS | |
352 | ||
353 | =over 2 | |
354 | ||
355 | =item - | |
356 | ||
357 | Perl 5.8 or later | |
358 | ||
359 | =item - | |
360 | ||
361 | File::Basename | |
362 | ||
363 | =item - | |
364 | ||
365 | Getopt::Std | |
366 | ||
367 | =item - | |
368 | ||
369 | Net::DNS I<(CPAN)> | |
370 | ||
371 | =item - | |
372 | ||
373 | Net::SMTP | |
374 | ||
375 | =back | |
376 | ||
377 | Furthermore you'll need a working DNS installation. | |
378 | ||
379 | =head1 DESCRIPTION | |
380 | ||
381 | checkmail checks the vailidity / deliverability of a mail address. | |
382 | You may submit just one address as the last argument or a file | |
383 | containing one address on each line using the B<-f> option. | |
384 | ||
385 | =head2 Configuration | |
386 | ||
387 | For the time being, all configuration is done in the script. You have | |
388 | to set the following elements of the %config hash: | |
389 | ||
390 | =over 4 | |
391 | ||
392 | =item B<$config{'helo'}> | |
393 | ||
394 | The hostname to be used for I<HELO> or I<EHLO> in the SMTP dialog. | |
395 | ||
396 | =item B<$config{'from'}> | |
397 | ||
398 | The sender address to be used for I<MAIL FROM> while testing. | |
399 | ||
400 | =item B<$config{'rand'}> | |
401 | ||
402 | A "random" local part to construct a reliably invalid address for use | |
403 | with the B<-r> option. | |
404 | ||
405 | =back | |
406 | ||
407 | =head2 Usage | |
408 | ||
409 | After configuring the script you may run your first test with | |
410 | ||
411 | checkmail user@example.org | |
412 | ||
413 | B<checkmail> will try to determine the mail exchanger(s) (MX) | |
414 | responsible for I<example.org> by querying the DNS for the respective | |
415 | MX records and then try to connect via SMTP (on port 25) to each of | |
416 | them in order of precedence (if necessary). It will run through the | |
417 | SMTP dialog until just before the I<DATA> stage, i.e. doing I<EHLO>, | |
418 | I<MAIL FROM> and I<RCPT TO>. If no MX is defined, B<checkmail> will | |
419 | fall back to the I<example.org> host itself, provided there is at | |
420 | least one A record defined in the DNS. If there are neither MX nor A | |
421 | records for I<example.org>, mail is not deliverable and B<checkmail> | |
422 | will fail accordingly. If no host can be reached, B<checkmail> will | |
423 | fail, too. Finally B<checkmail> will fail if mail to the given | |
424 | recipient is not accepted by the respective host. | |
425 | ||
426 | If B<checkmail> fails, you'll not be able to deliver mail to that | |
427 | address - at least not using the configured sender address and from | |
428 | the host you're testing from. However, the opposite is not true: a | |
429 | mail you send may still not be delivered even if a test via | |
430 | B<checkmail> succeeds. The receiving entity may reject your mail after | |
431 | the I<DATA> stage, due to content checking or without any special | |
432 | reason, or it may even drop, filter or bounce your mail after finally | |
433 | accepting it. There is no way to be sure a mail will be accepted short | |
434 | of sending a real mail to the address in question. | |
435 | ||
436 | You may, however, try to detect hosts that will happily accept any and | |
437 | all recipient in the SMTP dialog and just reject your mail later on, | |
438 | for example to defeat exactly the kind of check you try to do. | |
439 | B<checkmail> will do that by submitting a recipient address that is | |
440 | known to be invalid; if that address is accepted, too, you'll know | |
441 | that you can't reliably check the validity of any address on that | |
442 | host. You can force that check by using the B<-r> option. | |
443 | ||
444 | If you don't want to see just the results of your test, you can get a | |
445 | B<complete log> of the SMTP dialog by using the B<-l> option. That may be | |
446 | helpful to test for temporary failure conditions. | |
447 | ||
448 | On the other hand you may use the B<-q> option to suppress all output; | |
449 | B<checkmail> will then terminate with one of the following B<exit | |
450 | status>: | |
451 | ||
452 | =over 4 | |
453 | ||
454 | =item B<0> | |
455 | ||
456 | address(es) seem/seems to be valid | |
457 | ||
458 | =item B<1> | |
459 | ||
460 | temporary error (connection failure or temporary failure) | |
461 | ||
462 | =item B<2> | |
463 | ||
464 | address is invalid | |
465 | ||
466 | =item B<3> | |
467 | ||
468 | address cannot reliably be checked (test using B<-r> failed) | |
469 | ||
470 | =back | |
471 | ||
472 | You can do B<batch processing> using B<-f> and submitting a file with | |
473 | one address on each line. In that case the exit status is set to the | |
474 | highest value generated by testing all addresses, i.e. it is set to | |
475 | B<0> if and only if no adress failed, but to B<2> if even one address | |
476 | failed and to B<3> if even one addresses couldn't reliably be checked. | |
477 | ||
478 | And finally you can B<suppress DNS lookups> for MX and A records and | |
479 | just force B<checkmail> to connect to a particular host using the | |
480 | B<-m> option. | |
481 | ||
482 | B<Please note:> You shouldn't try to validate addresses while working | |
483 | from a dial-up or blacklisted host. If in doubt, use the B<-l> option | |
484 | to have a closer look on the SMTP dialog yourself. | |
485 | ||
486 | =head1 OPTIONS | |
487 | ||
488 | =over 3 | |
489 | ||
490 | =item B<-V> (version) | |
491 | ||
492 | Print out version and copyright information on B<checkmail> and exit. | |
493 | ||
494 | =item B<-h> (help) | |
495 | ||
496 | Print this man page and exit. | |
497 | ||
498 | =item B<-q> (quit) | |
499 | ||
500 | Suppress output and just terminate with a specific exit status. | |
501 | ||
502 | =item B<-l> (log) | |
503 | ||
504 | Log and print out the whole SMTP dialog. | |
505 | ||
506 | =item B<-r> (random address) | |
507 | ||
508 | Also try a reliably invalid address - defined in B<$config{'rand'}> - | |
509 | to catch hosts that try undermine address verification. | |
510 | ||
511 | =item B<-m> I<host> (MX to use) | |
512 | ||
513 | Force a connection to I<host> to check deliverability to that | |
514 | particular host irrespective of DNS entries. For example: | |
515 | ||
516 | checkmail -m test.host.example user@domain.example | |
517 | ||
518 | =item B<-f> I<file> (file) | |
519 | ||
520 | Process all addresses from I<file> (one on each line). | |
521 | ||
522 | =back | |
523 | ||
524 | =head1 INSTALLATION | |
525 | ||
526 | Just copy checkmail to some directory and get started. | |
527 | ||
528 | You can run your first test with | |
529 | ||
530 | checkmail user@example.org | |
531 | ||
532 | =head1 ENVIRONMENT | |
533 | ||
534 | See documentation of I<Net::DNS::Resolver>. | |
535 | ||
536 | =head1 FILES | |
537 | ||
538 | =over 4 | |
539 | ||
540 | =item F<checkmail.pl> | |
541 | ||
542 | The script itself. | |
543 | ||
544 | =back | |
545 | ||
546 | =head1 BUGS | |
547 | ||
548 | Please report any bugs or feature request to the author or use the | |
549 | bug tracker at L<http://bugs.th-h.de/>! | |
550 | ||
551 | =head1 SEE ALSO | |
552 | ||
553 | L<http://th-h.de/download/scripts.php> will have the current | |
554 | version of this program. | |
555 | ||
556 | This program is maintained using the Git version control system. You | |
557 | may clone L<git://code.th-h.de/mail/checkmail.git> to check out the | |
558 | current development tree or browse it on the web via | |
559 | L<http://code.th-h.de/?p=mail/checkmail.git>. | |
560 | ||
561 | =head1 AUTHOR | |
562 | ||
563 | Thomas Hochstein <thh@inter.net> | |
564 | ||
565 | =head1 COPYRIGHT AND LICENSE | |
566 | ||
567 | Copyright (c) 2002-2010 Thomas Hochstein <thh@inter.net> | |
568 | ||
569 | This program is free software; you may redistribute it and/or modify it | |
570 | under the same terms as Perl itself. | |
571 | ||
572 | =cut |