7 use Fcntl qw(:DEFAULT :flock);
12 $debug $needglue $localonly $repeat $verbosity
13 $admin $mail_state_dir $mail_max_warnfreq
14 $progress_fh $warn_fh $modifiers
15 %group2modcmd %group2used);
17 $quis= $0; $quis =~ s,.*/,,;
21 $etcfile= "/etc/bind/chiark-conf-gen.zones";
27 $admin=''; $mail_state_dir=''; $mail_max_warnfreq= 50;
30 $progress_fh= 'STDOUT';
34 use vars qw($dig_owner $dig_type $dig_rdata);
36 while (@ARGV && $ARGV[0] =~ m/^\-/) {
40 if (m/^(yes|no|force)$/) { m/^./; $mode= $&; $domail=''; }
41 elsif (m/^nothing$/) { $mode= 'x'; $domail=''; }
42 elsif (m/^mail\-(first|middle|final)/) { $mode='n'; $domail=$1; }
43 elsif (m/^all$/) { $doall=1; }
44 elsif (m/^config$/) { $etcfile= loarg(); $where= '--config option'; }
45 elsif (m/^glueless$/) { $needglue=0; }
46 elsif (m/^localonly$/) { $localonly=1; }
47 elsif (m/^quiet$/) { $verbosity--; }
48 elsif (m/^repeat$/) { $repeat=1; }
49 elsif (m/^verbose$/) { $verbosity++; }
50 else { usageerr("unknown option --$_"); }
55 if (s/^[ynf]//) { $mode=$&; $domail=''; }
56 elsif (s/^A//) { $doall=1; }
57 elsif (s/^C//) { $etcfile= soarg(); $where= '-C option'; }
58 elsif (s/^D//) { $debug++; }
59 elsif (s/^g//) { $needglue=0; }
60 elsif (s/^l//) { $localonly=1; }
61 elsif (s/^m(\w+)(\W+)$//) {
64 usageerr("modifiers $m for group $g: $@") if bad_modifiers($m);
66 elsif (s/^q//) { $verbosity--; }
67 elsif (s/^r//) { $repeat=1; }
68 elsif (s/^v//) { $verbosity++; }
69 else { usageerr("unknown option -$&"); }
74 sub loarg() { usageerr("missing option value") if !@ARGV; return shift @ARGV; }
75 sub soarg() { my ($rv); $rv=$_; $_=''; return length $rv ? $rv : loarg(); }
77 usageerr("-q may be specified at most twice") if $verbosity<0;
78 usageerr("-v may be specified at most once") if $verbosity>3;
79 usageerr("-D may be specified at most twice") if $debug>2;
80 usageerr("must specify either -f|-y|-n or zones (and not both)")
81 if !!$mode == !!@ARGV;
87 usage: chiark-named-conf [options] -f|-y|-n|<zone>...
89 -f --force install without checking
90 -y --yes check and install
91 -n --no check only (configured zones)
92 --nothing list zones only
93 --mail-* send mail about broken zones (see manpage)
94 <zone> ... check only (specified zones, even unconfigured ones)
96 -A --all report on zones marked ? (ones we know are broken)
97 -D debug $quis (does not help debug your DNS config)
98 -g --glueless do not warn about any glueless referrals (not recommended)
99 -l --localonly full checks only on zones which we primary
100 -q --quiet no output for OK zones
101 -r --repeat repeat warnings for all sources of imperfect data
102 -v --verbose extra verbose info about each zone
103 -C|--config <DIR/FILE use FILE as default config and DIR as default dir
105 chiark-named-conf is Copyright 2002 Ian Jackson. It is Free software, under
106 the GNU General Public License, and you are welcome to change it and/or
107 distribute copies under certain conditions. There is ABSOLUTELY NO WARRANTY.
111 cfg_fail("config filename $etcfile should not be directory")
112 if $etcfile =~ m,/$,;
114 use vars qw($default_dir);
115 $default_dir= $etcfile =~ m,^.*/, ? $& : './';
117 use vars qw($slave_dir $slave_prefix $slave_suffix);
122 use vars qw(@self_ns @self_soa @self_addr @forbid_addr @conv_glueless);
123 @self_ns= @self_soa= @self_addr= @forbid_addr= ();
124 @conv_glueless= qw(in-addr.arpa ip6.arpa ip6.int);
126 use vars qw(%zone_cfg @zone_cfg_list);
130 use vars qw($output $default_output %output_contents);
133 %output_contents= ();
135 use vars qw($check $install);
136 $check= $mode !~ m/^[fx]/;
137 $install= $mode =~ m/^[yf]/;
139 read_config($etcfile);
140 debug_dump('@zone_cfg_list %zone_cfg');
141 process_zones($mode ? @zone_cfg_list : @ARGV);
142 debug_dump('%output_contents');
143 output_files() if $install;
147 #-------------------- configuration reading
149 sub cfg_fail ($) { die "$quis: $where:\n $_[0]\n"; }
151 sub read_config ($) {
153 my ($fh,$z,@self,$before,$group,
154 $mod,$dir,$prefix,$suffix,$subfile,$lprefix,$lsuffix,$zf);
157 $fh= new IO::File $if,'r' or cfg_fail("open $if:\n $!");
160 if (!defined($_= <$fh>)) {
161 cfg_fail("read config file $if:\n $!") if $fh->error();
165 if (s/\\$//) { $before.= $_; next; }
173 if (m/^self(\-ns|\-soa|)\s+(\S.*\S)/) {
174 @self= split /\s+/, $2;
175 @self_ns= @self if $1 ne '-soa';
176 @self_soa= @self if $1 ne '-ns';
177 } elsif (m/^serverless\-glueless\s+(\S.*\S)/) {
178 @conv_glueless= split /\s+/, $1;
179 } elsif (m/^self\-addr\s+([0-9. \t]+)/) {
180 @self_addr= split /\s+/, $1;
181 } elsif (m/^forbid\-addr(?:\s+([0-9. \t]+))?/) {
182 @forbid_addr= defined $1 ? split /\s+/, $1 : ();
186 (?: \s+ ([^/ \t]*) (?: (/.+) )?
189 ($mod, $dir, $prefix, $suffix, $subfile) =
190 ($1,qualify($2),$3,$4,$5);
191 cfg_fail("modifiers $mod for directory $dir: $@")
192 if bad_modifiers($mod);
193 $suffix= '' if !defined $suffix;
194 $subfile= '' if !defined $subfile;
195 $suffix= '_db' if !length $suffix && !length $subfile;
196 if (-d "$dir/$prefix") { $dir.='/'; $dir.=$prefix; $prefix=''; }
197 opendir D, $dir or cfg_fail("open primary-dir $dir:\n $!");
198 $lprefix= length $prefix; $lsuffix= length $suffix;
199 while (defined($_= readdir D)) {
200 next if m/^\./ && !$lprefix;
201 next unless length > $lprefix+$lsuffix;
202 next unless substr($_,0,$lprefix) eq $prefix;
203 next unless substr($_,length($_)-$lsuffix) eq $suffix;
204 $z= substr($_,$lprefix,length($_)-($lprefix+$lsuffix));
205 $zf= $dir.'/'.$prefix.$z.$suffix.$subfile;
207 next if length $subfile && $! == &ENOENT;
208 cfg_fail("cannot stat zonefile $zf:\n $!");
210 -f _ or cfg_fail("zonefile $zf is not a plain file");
211 zone_conf($z,'primary','p',$mod,$zf);
213 closedir D or cfg_fail("close primary-dir $dir:\n $!");
214 } elsif (m/^primary(\W*)\s+(\S+)\s+(\S+)$/) {
215 zone_conf($2,'primary','p',$1,qualify($3));
216 } elsif (m/^published(\W*)\s+(\S+)\s+([0-9.\t]+)$/) {
217 zone_conf($2,'published','s',$1,'',$3);
218 } elsif (m/^stealth(\W*)\s+(\S+)\s+([0-9. \t]+)$/) {
219 zone_conf($2,'stealth','u',$1,'',split /\s+/, $3);
220 } elsif (m/^modifiers\s+(\W+)(?:\s+(\w+))$/) {
221 ($mod,$group) = ($1,$2);
222 cfg_fail("modifiers $mod for group $group: $@")
223 if bad_modifiers($mod);
224 if (exists $group2modcmd{$group}) {
225 $mod= $group2modcmd{$group};
226 $group2used{$group}++;
229 } elsif (m/^slave\-dir\s+(\S+)(?:(?:\s+(\S+))\s+(\S+))?$/) {
230 ($slave_dir, $slave_prefix, $slave_suffix) = (qualify($1),$2,$3);
231 $slave_prefix='' if !defined $slave_prefix;
232 $slave_suffix='' if !defined $slave_suffix;
233 } elsif (m/^output\s+bind8\+(\S+)$/) {
234 cfg_fail("default output may not apply to only some zones")
235 if @zone_cfg_list && length $default_output;
236 set_output(qualify($1));
237 } elsif (m/^include\s+(\S+)$/) {
239 } elsif (m/^admin\s+(\S+)$/) {
241 } elsif (m/^mail\-state\-dir\s+(\S+)$/) {
243 } elsif (m/^mail\-max\-warnfreq\s+(\d{1,3}(?:\.\d{0,5})?)$/) {
244 cfg_fail("mail-max-warnfreq must be <=100") if $1>100;
245 $mail_max_warnfreq= $1;
247 cfg_fail("unknown configuration directive".
248 " or incorrect syntax or arguments:\n".
252 foreach $group (keys %group2modcmd) {
253 next if exists $group2used{$group};
254 cfg_fail("command line specifies modifier group $group".
255 " but missing in configuration file");
257 $fh->close or cfg_fail("close config file $if:\n $!");
262 $i= "$default_dir$i" unless $i =~ m,^/,;
266 sub bad_modifiers ($) {
269 die "bad modifier $&" if m/[^!*\$\@~?]/;
270 die "repeated modifier $1" if m/(.).*$1/;
279 sub zone_conf ($$$$$@) {
280 my ($zone,$style,$sabbr,$mod,$file,@servers) = @_;
282 $file= qualify("$slave_dir/$slave_prefix".$zone.$slave_suffix)
284 if (!length $output) {
285 $default_output= qualify('chiark-conf-gen.bind8')
286 unless length $default_output;
287 set_output($default_output);
289 cfg_fail("redefined zone $zone\n".
290 " earlier definition $zone_cfg{$zone}{'where'}")
291 if exists $zone_cfg{$zone};
292 $zone_cfg{$zone}{'where'}= $where;
293 $zone_cfg{$zone}{'file'}= $file;
294 $zone_cfg{$zone}{'style_p'}= $style.$mod;
295 $zone_cfg{$zone}{'s'}= "$sabbr $mod $modifiers";
296 # p)rimary s)econdary u)npub f)oreign
297 # followed by modifiers, first per-zone, then default
298 $zone_cfg{$zone}{'servers'}= [ @servers ];
300 length $admin && length $mail_state_dir or
301 cfg_fail("mailing but failed to specify admin".
302 " or mail-state-dir before zone");
303 $zone_cfg{$zone}{'admin'}= $admin;
304 $zone_cfg{$zone}{'maildir'}= qualify($mail_state_dir);
305 $zone_cfg{$zone}{'mailmwarn'}= $mail_max_warnfreq;
307 foreach $sfx (qw(self_soa self_ns self_addr forbid_addr conv_glueless)) {
308 { no strict 'refs'; $aref= [ @$sfx ]; }
309 @$aref or cfg_fail("failed to specify $sfx before zone")
311 $zone_cfg{$zone}{$sfx}= $aref;
313 foreach $sfx (qw(self_soa self_ns)) {
314 $zone_cfg{$zone}{$sfx} =~ s/\*$/$zone/;
316 $zone_cfg{$zone}{'output'}= $output;
317 push @zone_cfg_list, $zone;
323 $output_contents{$output}= '';
326 #-------------------- checking
328 use vars qw($zone $cfg $warnings %zone_warnings);
333 return if $verbosity < $minv;
334 print $progress_fh "$m\n" or die "$quis: $zone: write log: $!\n";
337 sub verbose ($) { progress(3, ' ' . $_[0]); }
339 sub process_zones (@) {
343 foreach $zone (@zones) {
344 $cfg= $zone_cfg{$zone} || {
345 'style_p' => 'foreign',
350 mail_zone_before() if $domail;
352 progress(1, sprintf "%-20s %s", $zone, $$cfg{'style_p'});
353 if ($check && ($doall || !zone_style('?',0))) {
355 if ($localonly && $cfg->{'s'} =~ m/f/) {
356 zone_warning("foreign zone specified with -l",'');
357 } elsif ($localonly && $cfg->{'s'} !~ m/p/) {
363 zone_warning("checks failed: $@",'') if length $@;
365 $output_contents{$$cfg{'output'}} .= zone_output()
368 mail_zone_after() if $domail;
371 } elsif ($warnings) {
372 printf STDERR ("%s: %d warning(s) in %d zone(s);".
373 " %d zone(s) checked ok.\n",
376 scalar(keys %zone_warnings),
377 scalar(@zones - keys %zone_warnings));
379 progress(1, sprintf "%d zone(s) checked ok", scalar @zones);
383 use vars qw(%delgs); # $delgs{$nameserver_list} = [ $whosaidandwhy ]
384 use vars qw(%auths); # $auths{$nameserver_list} = [ $whosaidandwhy ]
385 use vars qw(%glue); # $glue{$name}{$addr_list} = [ $whosaidandwhy ]
386 use vars qw(%soas); # $soa{"$serial $origin"} = [ $whosaidandwhy ]
387 use vars qw(%addr_is_ok %warned);
388 use vars qw($delg_to_us);
389 use vars qw(@to_check); # ($addr,$whyask,$name_if_auth,$glueless_ok, ...)
390 use vars qw(@to_check_soa); # ($addr,$whyask,$name,$is_ns, ...)
392 sub zone_warning ($$) {
396 return 0 if !$repeat && $warned{$w}++;
401 $w .= " ($o)" if length $o;
402 print $warn_fh "$zone: warning: $w\n" or die $!;
404 $zone_warnings{$zone}++;
408 sub zone_warnmore ($) {
409 print $warn_fh "$zone: $_[0]\n" or die $!;
412 sub zone_check_full () {
419 %delgs= %auths= %glue= %soas= %warned= %addr_is_ok= ();
421 @to_check= @to_check_soa= ();
424 sub zone_investigate() {
425 my ($super_zone, @start_nsnames, $start_ww,
426 $start_ns, @start_ns_addrs, $s, $wa, $name_if_auth,
427 %nsrrset_checked, %soa_checked, $addr, $glueless_ok,
428 $rcode, $name, $is_ns);
430 if (!zone_style('*',0)) {
433 debug_trace("zone $zone superzone $super_zone");
435 and die "no superzone ? ($super_zone)\n";
436 $super_zone =~ s/^[^.]+\.//
438 ($rcode,@start_nsnames)=
439 lookup($super_zone,'ns-','06',"superzone search");
442 $start_ww= "server for $super_zone";
444 ($rcode,@start_nsnames)=
445 lookup($zone,'ns-','0',"initial nameserver search");
446 $start_ww= "nameserver for $zone";
448 for $start_ns (@start_nsnames) {
449 $start_ns= lc $start_ns;
450 ($rcode,@start_ns_addrs)= lookup($start_ns,'a','0',"$start_ww");
451 foreach $addr (@start_ns_addrs) {
452 push @to_check, $addr, "$start_ns, $start_ww", undef, 0;
456 # We do these in order so that we always do NS RRset checks on
457 # nameservers that came from other NS RRsets first; otherwise
458 # we might set nsrrset_checked due to a glueless_ok check,
459 # and then not check for gluefulness later.
460 debug_dump('@to_check @to_check_soa');
461 if (($addr,$wa,$name_if_auth,$glueless_ok,@to_check) = @to_check) {
462 push @to_check_soa, $addr, $wa, $name_if_auth, 1,
463 if defined $name_if_auth;
464 next if $nsrrset_checked{$addr}++;
465 zone_check_nsrrset($addr, $wa, $name_if_auth, $glueless_ok);
466 } elsif (($addr,$wa,$name,$is_ns,@to_check_soa) = @to_check_soa) {
467 next if $soa_checked{$addr}++;
468 zone_check_soa($addr,$wa,$name,$is_ns);
475 sub zone_check_nsrrset ($$$$) {
476 my ($uaddr,$wa, $name_if_auth, $glueless_ok) = @_;
477 my (@s, $s, $a, %s2g, @glue, $glue, $delgs_or_auths, $wwn, $ww);
480 verbose("checking delegation by $ww");
482 if ($dig_type eq 'ns' && $dig_owner eq $zone) {
483 $s2g{lc $dig_rdata} = [ ];
484 } elsif ($dig_type eq 'a' && exists $s2g{$dig_owner}) {
485 $wwn= "in glue from $ww";
486 zone_server_queue($dig_rdata,$dig_owner,$wwn,"NS [$uaddr]",0);
487 push @{ $s2g{$dig_owner} }, $dig_rdata;
492 zone_warning("unable to find NS RRset at [$uaddr]", $wa);
494 } elsif (keys %s2g == 1) {
495 zone_warning("only one nameserver ". (join '', keys %s2g),
500 zone_ns_name($s,$ww);
501 @glue= @{ $s2g{$s} };
503 zone_warning("glueless NS $s", $ww)
504 unless $glueless_ok || zone_style('~',!$needglue) ||
505 grep { has_suffix_of($zone,".$_"); }
506 @{ $cfg->{'conv_glueless'} };
507 ($rcode,@glue)= lookup($s,'a','0',"glueless NS from $ww");
509 $wwn= "glueless NS from $ww";
510 zone_server_queue($a,$s,$wwn,"NS [$uaddr]",0);
513 $glue= join ' ', sort @glue;
514 push @{ $glue{$s}{$glue} }, $ww;
517 $delgs_or_auths= defined($name_if_auth) ? \%auths : \%delgs;
518 push @{ $delgs_or_auths->{$s} }, $ww;
521 sub zone_ns_name ($$) {
524 $delg_to_us=1 if grep { $name eq $_ } @{ $cfg->{'self_ns'} };
525 foreach $cg (@{ $cfg->{'conv_glueless'} }) {
526 zone_warning("nameserver $name in serverless-glueless".
527 " namespace area $cg",
529 if has_suffix_of(".$name",".$cg");
531 zone_warning("published server, as $name, but configured as stealth",
533 if $cfg->{'s'} =~ m/u/ &&
535 @{ $cfg->{'self_ns'} }, @{ $cfg->{'self_soa'} };
538 sub zone_server_queue ($$$$$) {
539 my ($addr,$name,$wwn,$wwq,$is_soa) = @_;
540 zone_server_addr($addr,$name,$wwn,$wwq,$is_soa);
541 push @to_check, $addr, "$name, $wwn", $name, $is_soa;
544 sub zone_server_addr ($$$$$) {
545 my ($addr,$name,$ww,$wwq,$is_soa) = @_;
546 debug_trace("zone_server_addr ".join '|',@_);
547 $addr_is_ok{$addr}= "$name ($wwq)"
548 if $is_soa || $cfg->{'s'} =~ m/u/;
549 zone_warning("forbidden nameserver address [$addr] $name",$ww)
550 if grep { $_ eq $addr } @{ $cfg->{'forbid_addr'} };
552 my ($name_is_self, $addr_is_self);
553 $name_is_self= grep { $_ eq $name }
554 @{ $cfg->{$is_soa ? 'self_soa' : 'self_ns'} };
555 $addr_is_self= grep { $_ eq $addr }
556 @{ $cfg->{'self_addr'} };
557 if ($name_is_self && !$addr_is_self) {
558 zone_warning("our $name supplied with wrong address [$addr]", $ww);
560 if (!$name_is_self && $addr_is_self) {
561 zone_warning("we [$addr] are named in ".
562 ($is_soa ? "SOA" : "NS").
563 " by wrong name $name",
566 if (!$name_is_self && !$addr_is_self &&
567 $is_soa && $cfg->{'s'} =~ m/p/) {
568 zone_warning("SOA ORIGIN $name is not us (".
569 (join ' ', @{ $cfg->{'self_soa'} }).")", $ww);
571 $delg_to_us=1 if $addr_is_self && !$is_soa;
574 sub zone_check_soa ($$$$) {
575 my ($uaddr,$wa,$name,$is_ns) = @_;
576 my ($lame,$serial,$origin,$got,$rcode,@soa_addrs,$soa_addr,$ww,$wwn);
577 verbose("checking service at [$uaddr] $name");
578 $lame= 'dead or lame';
581 if ($dig_type eq 'flags:') {
582 $lame= $dig_rdata =~ m/ aa / ? '' : 'lame';
583 } elsif ($dig_type eq 'soa' && $dig_owner eq $zone && !$lame) {
584 die "several SOAs ? $ww" if defined $origin;
586 $got =~ m/^(\d+) (\S+)$/ or die "$got ?";
587 ($serial,$origin) = ($1,$2);
591 $lame= 'broken' if !$lame && !defined $origin;
592 if ($lame) { zone_warning("$lame server [$uaddr]",$wa); return; }
593 progress(2, sprintf "%-16s %46s has %s%s",
594 $zone, "$name [$uaddr]", $serial, $is_ns ? '' : '*');
595 push @{ $soas{$got} }, $ww;
596 ($rcode,@soa_addrs)= lookup($origin,'a','0',"SOA ORIGIN");
597 $wwn= "SOA ORIGIN from $ww";
598 foreach $soa_addr (@soa_addrs) {
599 zone_server_queue($soa_addr,$origin,$wwn,"SOA [$uaddr]",1);
603 sub zone_consistency() {
604 my ($d, $org_ser, $origin, $a, $h, $self_soa, $wa);
605 zone_consistency_set('delegations',\%delgs);
606 foreach $d (keys %delgs) { delete $auths{$d}; }
607 zone_consistency_set('zone nameserver rrset',\%auths);
608 foreach $h (keys %glue) {
609 zone_consistency_set("glue for $h", $glue{$h});
611 zone_consistency_set("serial number and/or SOA ORIGIN",\%soas);
612 $self_soa= $cfg->{'self_soa'};
615 sub zone_servers_ok () {
619 foreach $a (@{ $cfg->{'servers'} }) {
620 next if exists $addr_is_ok{$a};
621 zone_warning("we slave from [$a]",'')
625 foreach $a (keys %addr_is_ok) {
626 zone_warnmore("permitted master [$a] $addr_is_ok{$a}");
630 if ($cfg->{'s'} =~ m/s/ && !$delg_to_us) {
631 zone_warning("we are supposedly published secondary,".
632 " but not listed as a nameserver",'');
633 map { $fs{$_}=1 } keys(%delgs), keys(%auths);
634 zone_warnmore("servers are: ". join ' ', sort keys %fs);
638 sub zone_consistency_set ($%) {
641 if (keys(%$set) > 1) {
642 zone_warning("inconsistent $msg:",'');
643 foreach $d (keys %$set) {
644 foreach $o (@{ $set->{$d} }) { zone_warnmore(" $d from $o"); }
649 sub zone_check_local () {
650 zone_servers_simplefind();
654 sub zone_servers_simplefind () {
655 my ($rcode,@nsnames,$ns,@soas,$origin);
657 ($rcode,@nsnames)= lookup($zone,'ns-','0',"zone's servers");
658 foreach $ns (@nsnames) {
659 zone_ns_name($ns,"NS");
660 zone_server_simple($ns,'NS',0);
662 $delgs{join ' ', sort @nsnames} = [ "zone's servers" ];
664 ($rcode,@soas)= lookup($zone,'soa','0',"SOA ORIGIN");
665 die "multiple SOA RRs in set! @soas ?" if @soas!=1;
666 $soas[0] =~ m/^(\S+)\s/ or die "SOA ? $_";
667 zone_server_simple(domain_canon($1,"lookup $zone SOA"),'SOA',1);
670 sub zone_server_simple ($$$) {
671 my ($name,$ww,$is_soa) = @_;
672 my ($rcode,@addrs,$addr);
673 ($rcode,@addrs)= lookup($name,'a','0', "server - ".
674 ($is_soa ? "SOA ORIGIN" : "NS"));
675 foreach $addr (@addrs) { zone_server_addr($addr,$name,$ww,$ww,$is_soa); }
678 sub zone_style ($$) {
679 my ($stylechar, $default) = @_;
680 local ($_) = $$cfg{'s'};
681 $stylechar =~ s/\W/\\$&/ or die;
682 return m/(\S*)$stylechar/ ? $1 !~ m/\!/ : $default;
685 #-------------------- mailing
687 use vars qw($m_base $m_lastok @m_ok @m_fail
688 $m_info $m_time $m_lock $m_m);
690 sub mail_zone_before () {
693 $m_base= $$cfg{'maildir'}.'/'.$zone;
699 $m_lock= new IO::File "${m_base}_lock", O_RDWR|O_CREAT, 0600
700 or die "$quis: create lockfile ${m_base}_lock";
701 if (!flock($m_lock, LOCK_EX|LOCK_NB)) {
702 <$m_lock> =~ m/^\d+ /;
703 die "$quis: $zone: concurrrency? - flock $&$!\n";
707 (@s1= $m_lock->fstat) or die "$quis: fstat ${m_base}_lock: $!\n";
708 (@s2= stat "${m_base}_lock") or
709 die "$quis: stat ${m_base}_lock: $!\n";
710 last if ($s1[0] eq $s2[0] && $s1[1] eq $s2[1]);
713 (print $m_lock "$$ \n" and $m_lock->flush)
714 or die "$quis: write pid to ${m_base}_lock: $!\n";
716 if ($m_info= new IO::File "${m_base}_info", 'r') {
718 $_ =~ m/\n/ or die "$quis: read ${m_base}_info: $!\n";
719 m/^\d+ (\d+|-) ([0-9:]*) ([0-9:]*) / or
720 die "$quis: ${m_base}_info malformed\n";
722 if ($domail ne 'first') {
723 if ($2 eq ':' && $3 eq ':') {
724 warn "$quis: $zone: mid/last run, but last".
725 "run already done, ignoring zone\n";
728 @m_ok= split /\:/, $2;
729 @m_fail= split /\:/, $3;
731 } elsif ($! != &ENOENT) {
732 die "$quis: open ${m_base}_info: $!\n";
733 } elsif ($domail eq 'first') {
734 warn "$quis: $zone: first run, but not --mail-first,".
738 if ($domail eq 'first') {
739 remove "${m_base}_history" or $!==&ENOENT
740 or die "$quis: remove ${m_base}_history: $!\n";
742 $progress_fh= $warn_fh= new IO::File "${m_base}_history",'a',0666
743 or die "$quis: open ${m_base}_history: $!\n";
744 $m_info= new IO::File "${m_base}_info.tmp",'w',0666
745 or die "$quis: open ${m_base}_info.tmp: $!\n";
748 progress(-1, "\n".('-'x70)."\n".ptime($m_time)."\n");
751 sub mail_zone_after () {
752 if ($zone_warnings{$zone}) {
753 push @m_fail, $m_time;
754 progress(-1,"failed - $zone_warnings{$zone} warnings");
758 progress(-1,"everything is fine");
760 close $progress_fh or die "$quis: close ${m_base}_history: $!\n";
761 $progress_fh= $warn_fh= 'STDERR';
763 if ($domail eq 'final') {
764 if (100*@m_fail <= $$cfg{'mailmwarn'}*(@m_fail + @m_ok)) {
765 printf " %-40s ok\n" or die "$quis: mail ok report: $!\n";
766 } elsif (zone_style('@',0)) {
767 printf " %-40s mail suppressed\n"
768 or die "$quis: mail suppress report: $!\n";
774 @m_fail= @m_ok= ('','')
775 if $domail eq 'final';
777 printf $m_info "%s %s %s %s \n",
778 $m_time, $m_lastok, join(':',@m_ok), join(':',@m_fail)
779 or die "$quis: write new ${m_base}_info: $!\n";
780 $m_info->close or die "$quis: close new ${m_base}_info: $!\n";
781 rename "${m_base}_info.tmp", "${m_base}_info"
782 or die "$quis: install new ${m_base}_info: $!\n";
789 or die "$quis: write ${m_base}_mail: $!\n";
793 return gmtime($time)." GMT ($time)";
796 sub mail_zone_mail () {
797 my ($log, $zone_to, $zterr, $c, $r, $t);
798 $m_m= new IO::File "${m_base}_mail", 'w', 0666
799 or die "$quis: create ${m_base}_mail: $!\n";
800 $zone_to=''; $zterr='';
801 if (!zone_style("\$",$$cfg{'s'} =~ m/u/)) {
803 $_= lookup($zone,'soa','0','problem-addr');
804 m/\n\n/ and die "multiple soas\n";
805 m/^\S+ (\S.*\@\S+) [0-9 ]+$/ or
806 die "bad soa \`$_'\n";
813 From: zone check system <$$cfg{'admin'}>
814 Subject: $zone - configuration problems report
818 pmail("SOA MNAME for $zone <$zone_to>\nCC: ")
820 pmail($$cfg{'admin'}."\n\n");
822 You are receiving this mail because your email address is listed
823 in the SOA (Start Of Authority) record for $zone
824 in the DNS, which means you are supposedly the DNS administrator
825 responsible for this zone. This report is generated automatically
826 on behalf of $$cfg{'admin'}, who
827 is the administrator for a server for the zone. Please contact
828 them if you have any problem with this report.
833 Sent to $$cfg{'admin'} since SOA MNAME unavailable:
839 The zone has had configuration errors or persistent operational
840 problems during recent checks. See the logs below for details.
842 Check history for $zone:
845 if ($m_lastok ne '-') {
846 pmail(" Last seen to be fine: ".ptime($m_lastok)."\n");
848 pmail(" No record of this zone ever being fine.\n");
851 pmail(" Errors/warnings at: ".ptime($t)."\n");
854 pmail(" Everything in order at: ".ptime($t)."\n");
857 $log= new IO::File "${m_base}_history",'r'
858 or die "$quis: reopen ${m_base}_history: $!";
862 $log->error && $log->close
863 or die "$quis: reread or close ${m_base}_log: $!";
864 $m_m->close or die "$quis: close ${m_base}_mail: $!\n";
865 $m_m= new IO::File "${m_base}_mail"
866 or die "$quis: reopen ${m_base}_mail: $!";
868 defined($c= fork) or die "$quis: fork for mail: $!\n";
870 open STDIN, "<& ${m_m}" or die "$quis - sendmail: dup for stdin: $!\n";
871 exec '/usr/sbin/sendmail','-odq','-oee','-oi',
872 'ijackson@chiark.greenend.org.uk'; # should be -t
873 die "$quis - sendmail: exec: $!\n";
876 $!=0; $r= waitpid $c,0;
877 $r == $c or die "$quis: waitpid sendmail ($c): $r $!";
878 $? and warn "$quis: sendmail failed: $?\n";
880 printf " %-40s %s\n", $zone, $zone_to or
881 die "$quis: write mailing report: $!\n";
884 #-------------------- outputting
889 $o= "zone \"$zone\" {\n";
890 if ($$cfg{'s'} =~ m/p/) {
891 $o.= " type master;\n";
893 $o.= " type slave;\n".
895 foreach $m (@{ $$cfg{'servers'} }) { $o.= " $m;\n"; }
898 $o.= " file \"$$cfg{'file'}\";\n";
903 sub output_files () {
904 my ($fn,$ofn,$mfn,$l,$dir, $maxmode,$h,@to_install);
906 foreach $ofn (keys %output_contents) {
907 $fn= $ofn; $mfn= "output file $fn";
910 $! == &ENOENT or die "$quis: stat $mfn:\n $!\n";
914 $maxmode= (stat _)[2];
917 defined($l= readlink $fn)
918 or die "$quis: readlink $mfn:\n $!\n";
919 $dir= $fn =~ m,^.*/, ? $& : './';
920 $fn= "$dir$l" unless $l =~ m,^/,;
921 $mfn= "output file $fn (symlink target of $ofn)";
923 die "$quis: output file $mfn exists but is not a file".
924 " (or symlink to one)";
927 unlink "$fn.new" or $! == &ENOENT or
928 die "$quis: cannot clear out old .new version of $mfn:\n $!";
929 $h= new IO::File "$fn.new",'w',$maxmode
930 or die("$quis: create .new version of $mfn:\n $!");
932 "# generated by $quis, do not edit\n",
933 $output_contents{$ofn}
934 or die "$quis: write data to .new version of $mfn:\n $!";
936 or die "$quis: close .new version of $mfn:\n $!";
937 push @to_install, $fn,$mfn;
940 while (($fn,$mfn, @to_install) = @to_install) {
942 or die "$quis: install new version of $mfn:\n $!";
946 #-------------------- general utilities
950 return unless $debug>1;
951 local $Data::Dumper::Terse=1;
952 foreach $vn (split /\s+/, $_[0]) {
953 print "$vn := ", eval "Dumper(\\$vn)";
957 sub debug_trace ($) {
958 return unless $debug;
962 sub has_suffix_of ($$) {
963 my ($whole,$suffix) = @_;
964 debug_trace("has_suffix_of $whole $suffix");
965 return 0 if length $whole < length $suffix;
966 return 0 if substr($whole, length($whole) - length($suffix)) ne $suffix;
967 debug_trace("has_suffix_of $whole $suffix YES");
972 my ($domain,$type,$okrcodes,$w) = @_;
974 debug_trace("lookup ==> (->$okrcodes) $domain $type");
977 defined($c= open $h, "-|") or die "$quis: fork adnshost:\n $!\n";
979 exec 'adnshost','-Fi','+Do','+Dt','+Dc','-Cf',"-t$type",
981 die "$quis: exec adnshost:\n $!\n";
983 @result= $h->getlines();
984 $h->error and die "$quis: read from adnshost:\n $!\n";
987 die "$quis: lookup -t$type $domain $okrcodes ($w) failed $? $! @result\n"
988 if $! or $?&255 or $?>1536 or index($okrcodes,$?>>8)<0;
989 debug_trace("lookup <== $? @result");
994 my ($eachrr, $qowner,$qtype,$qaddr) = @_;
995 # also pseudo-rr with type `flags:'
996 my ($h,$inmid,$irdata,$c,$digwhy);
999 debug_trace("dig ==> \@$qaddr $qowner $qtype");
1002 defined($c= open $h, "-|") or die "$quis: fork dig:\n $!\n";
1004 open STDERR, ">&STDOUT" or die $!;
1006 '+nodef','+nosea','+nodebug','+norecurse',
1007 "\@$qaddr",'-t',$qtype,$qowner);
1008 die "$quis: exec dig:\n $!\n";
1012 if (!defined($_= $h->getline())) {
1013 $h->error() and die "$quis: read from dig:\n $!\n";
1017 if (length $inmid) {
1018 s/^\s+/ / or die "$inmid // $_ ?";
1022 s/$/ \(/ unless s/\s*\)\s*$//;
1024 if (s/\s*\(\s*$//) { $inmid= $_; next; }
1025 $digwhy= "dig $qowner $qtype $qaddr \`$_'";
1026 if (m/^\;\; flags\:( [-0-9a-z ]+)\;/) {
1027 $dig_owner=''; $dig_type='flags:'; $dig_rdata= "$1 ";
1028 debug_trace("dig f: $dig_rdata");
1032 } elsif (m/^([-.0-9a-z]+)\s+\d\w+\s+in\s+([a-z]+)\s+(\S.*)/i) {
1033 $dig_owner=domain_canon($1,$digwhy); $dig_type=lc $2; $irdata=$3;
1034 if ($dig_type eq 'a') {
1035 $irdata =~ m/^[.0-9]+$/ or die "$irdata ?";
1037 } elsif ($dig_type eq 'ns') {
1038 $irdata =~ m/^[-.0-9a-z]+$/i or die "bad nameserver $irdata ?";
1039 $dig_rdata= domain_canon($irdata,$digwhy);
1040 } elsif ($dig_type eq 'soa') {
1041 $irdata =~ m/^([-.0-9a-z]+)\s+.*\s+(\d+)(?:\s+\d\w+){4}$/i
1042 or die "bad SOA $irdata ?";
1043 $dig_rdata= $2.' '.domain_canon($1,$digwhy);
1045 debug_trace("ignoring uknown RR type $dig_type");
1048 debug_trace("dig $dig_owner $dig_type $dig_rdata");
1051 debug_trace("ignoring unknown dig output $_");
1055 debug_trace("dig <== gave $?");
1058 sub domain_canon ($$) {
1061 return '.' if $i eq '.';
1062 die "domain $i ($w) ?" unless $i =~ m/^[0-9a-z]/i;