X-Git-Url: http://www.chiark.greenend.org.uk/ucgi/~ian/git?p=chiark-utils.git;a=blobdiff_plain;f=scripts%2Fnamed-conf;h=3dfe87f142d3f39894347d99cc82a7385a9b8e72;hp=e788f07a4251f034d08a030e13c583ff3be5eeca;hb=613808c5eb232d65bbb0c39e2effd86c6f3704c7;hpb=4f4c11add419e120b2800a350f23091f47e7e03f diff --git a/scripts/named-conf b/scripts/named-conf index e788f07..3dfe87f 100755 --- a/scripts/named-conf +++ b/scripts/named-conf @@ -1,281 +1,690 @@ -#!/usr/bin/perl +#!/usr/bin/perl -w -$base= "/var/named"; -$conf= "$base/conf"; -$etcfile= "/etc/named/zones-rgc"; +use strict; +use IO::File; +use Data::Dumper; +use POSIX; -$check= 1; -$progress= 1; +use vars qw($quis + $mode $doall + $etcfile $where + $debug $needglue $localonly $verbosity); -while ($ARGV[0] =~ m/^\-/) { +$quis= $0; $quis =~ s,.*/,,; + +$mode= ''; +$doall= 0; +$etcfile= "/etc/bind/chiark-conf-gen.zones"; +$where= ''; +$debug= 0; +$needglue= 2; +$localonly= 0; +$verbosity= 1; + +use vars qw($dig_owner $dig_type $dig_rdata); + +while (@ARGV && $ARGV[0] =~ m/^\-/) { $_= shift @ARGV; - last if m/^\-\-?$/; - while (m/^\-./) { - if (s/^\-f/-/) { $usage=0; $check=0; $install++; } - elsif (s/^\-y/-/) { $usage=0; $check=1; $install++; } - elsif (s/^\-n/-/) { $usage=0; $check=1; $install=0; } - elsif (s/^\-h/-/) { $hostdelg=1; $hostzone=0; } - elsif (s/^\-z/-/) { $hostdelg=1; $hostzone=1; } - elsif (s/^\-q/-/) { $progress=0; } - else { $usage=1; break; } + if (s/^\-\-//) { + last if m/^$/; + if (m/^(yes|no|force)$/) { m/^./; $mode= $&; } + elsif (m/^all$/) { $doall=1; } + elsif (m/^config$/) { $etcfile= loarg(); $where= '--config option'; } + elsif (m/^glueless$/) { $needglue--; } + elsif (m/^localonly$/) { $localonly=1; } + elsif (m/^quiet$/) { $verbosity=0; } + elsif (m/^verbose$/) { $verbosity=2; } + else { usageerr("unknown option --$_"); } + } else { + s/^\-//; + last if m/^$/; + while (m/^./) { + if (s/^[ynf]//) { $mode=$&; } + elsif (s/^A//) { $doall=1; } + elsif (s/^C//) { $etcfile= soarg(); $where= '-C option'; } + elsif (s/^D//) { $debug++; } + elsif (s/^g//) { $needglue--; } + elsif (s/^l//) { $localonly=1; } + elsif (s/^q//) { $verbosity=0; } + elsif (s/^v//) { $verbosity=2; } + else { usageerr("unknown option -$&"); } + } } } -die -"usage: named-conf-regen -f|-y|-n [-h|-z]\n". +sub loarg() { usageerr("missing option value") if !@ARGV; return shift @ARGV; } +sub soarg() { my ($rv); $rv=$_; $_=''; return length $rv ? $rv : loarg(); } + +usageerr("-g may be specified at most twice") if $needglue<0; +usageerr("-D may be specified at most twice") if $debug>2; +usageerr("must specify either -f|-y|-n or zones (and not both)") + if !!$mode == !!@ARGV; + +sub usageerr ($) { + die +"$_[0] +usage: named-conf-regen [-rvq] -f|-y|-n|...\n". "operation modes:\n". -" -f install without checking -ff and then ndc reload\n". -" -y check and install -yy and then ndc reload\n". -" -n check only\n". +" -f --force install without checking\n". +" -y --yes check and install\n". +" -n --no check only\n". "additional options:\n". -" -h check output from host -C\n". -" -z check output from host -C and host -val\n". - if $usage; - -beginfile('secondary.zones'); -open E, "< $etcfile" or die "$0: open $etcfile: $!\n"; -for (;;) { - $!=0; defined $_= or die "$0: read $etcfile $!\n"; - s/^\s+//; chomp; s/\s+$//; - next if m/^\#/; - last if m/^end$/; - if (m/^myname\s+(\S.*\S)/) { - @mynames= split /\s+/, $1; - } elsif (m/^(secondary|backup|unoff)\s+(\S+)\s+([0-9. \t]+)$/) { - $style= $1; - $zone= $2; - @servers= split /\s+/, $3; - $file= "slave/$zone"; - progress(); - check(); - } else { - die "$0: $etcfile:$.: syntax error in \`$_'\n"; +" -q --quiet no output for OK zones\n". +" -v --verbose extra verbose\n"; +} + +cfg_fail("config filename $etcfile should not be directory") + if $etcfile =~ m,/$,; + +use vars qw($default_dir); +$default_dir= $etcfile =~ m,^.*/, ? $& : './'; + +use vars qw($slave_dir $slave_prefix $slave_suffix); +$slave_dir= 'slave'; +$slave_prefix= ''; +$slave_suffix= ''; + +use vars qw(@self_ns @self_soa @self_addr); +@self_ns= @self_soa= @self_addr= (); + +use vars qw(%zone_cfg @zone_cfg_list); +%zone_cfg= (); +@zone_cfg_list= (); + +use vars qw($output $default_output %output_contents); +$output= ''; +$default_output= ''; +%output_contents= (); + +use vars qw($check $install); +$check= $mode !~ m/^f/; +$install= $mode =~ m/^[yf]/; + +read_config($etcfile); +debug_dump('@zone_cfg_list %zone_cfg'); +process_zones($mode ? @zone_cfg_list : @ARGV); +debug_dump('%output_contents'); +output_files() if $install; + +exit 0; + +#-------------------- configuration reading + +sub cfg_fail ($) { die "$quis: $where:\n $_[0]\n"; } + +sub read_config ($) { + my ($if) = @_; + my ($fh,$z,@self,$before, + $mod,$dir,$prefix,$suffix,$subfile,$lprefix,$lsuffix,$zf); + local ($_); + + $fh= new IO::File $if,'r' or cfg_fail("open $if:\n $!"); + $before= ''; + for (;;) { + if (!defined($_= <$fh>)) { + cfg_fail("read config file $if:\n $!") if $fh->error(); + last; + } + chomp; s/\s+$//; + if (m/\\$/) { $before.= $_; next; } + $_= $before.$_; + $before= ''; + s/^\s+//; + $where= "$if:$."; + next if m/^\#/; + last if m/^end$/; + next unless m/\S/; + if (m/^self(\-ns|\-soa|)\s+(\S.*\S)/) { + @self= split /\s+/, $2; + @self_ns= @self if $1 ne '-soa'; + @self_soa= @self if $1 ne '-ns'; + } elsif (m/^self\-addr\s+([0-9. \t]+)/) { + @self_addr= split /\s+/, $1; + } elsif (m,^ + primary\-dir ([*?]?) + \s+ (\S+)/([^/ \t]*) + (?: \s+ ([^/ \t]*) (?: (/.+) )? + )? + $,x) { + ($mod, $dir, $prefix, $suffix, $subfile) = + ($1,qualify($2),$3,$4,$5); + $suffix= '' if !defined $suffix; + $subfile= '' if !defined $subfile; + $suffix= '_db' if !length $suffix && !length $subfile; + if (-d "$dir/$prefix") { $dir.='/'; $dir.=$prefix; $prefix=''; } + opendir D, $dir or cfg_fail("open primary-dir $dir:\n $!"); + $lprefix= length $prefix; $lsuffix= length $suffix; + while (defined($_= readdir D)) { + next if m/^\./ && !$lprefix; + next unless length > $lprefix+$lsuffix; + next unless substr($_,0,$lprefix) eq $prefix; + next unless substr($_,length($_)-$lsuffix) eq $suffix; + $z= substr($_,$lprefix,length($_)-($lprefix+$lsuffix)); + $zf= $dir.'/'.$prefix.$z.$suffix.$subfile; + if (!stat $zf) { + next if length $subfile && $! == &ENOENT; + cfg_fail("cannot stat zonefile $zf:\n $!"); + } + -f _ or cfg_fail("zonefile $zf is not a plain file"); + zone_conf($z,'primary','p',$mod,$zf); + } + closedir D or cfg_fail("close primary-dir $dir:\n $!"); + } elsif (m/^primary([*?]?)\s+(\S+)\s+(\S+)$/) { + zone_conf($2,'primary','p',$1,qualify($3)); + } elsif (m/^published([*?]?)\s+(\S+)\s+([0-9.\t]+)$/) { + zone_conf($2,'published','s',$1,'',$3); + } elsif (m/^stealth([*?]?)\s+(\S+)\s+([0-9. \t]+)$/) { + zone_conf($2,'stealth','u',$1,'',split /\s+/, $3); + } elsif (m/^slave\-dir\s+(\S+)(?:(?:\s+(\S+))\s+(\S+))?$/) { + ($slave_dir, $slave_prefix, $slave_suffix) = (qualify($1),$2,$3); + } elsif (m/^output\s+bind8\+(\S+)$/) { + cfg_fail("default output may not apply to only some zones") + if @zone_cfg_list && length $default_output; + set_output(qualify($1)); + } elsif (m/^include\s+(\S+)$/) { + read_config($1); + } else { + cfg_fail("unknown configuration directive". + " or incorrect syntax or arguments"); + } } + $fh->close or cfg_fail("close config file $if:\n $!"); } -sub lookup ($$) { - my ($type,$domain) = @_; - my ($c,@result); - defined($c=open ADH, "-|") or die "$0: fork adnshost: $!\n"; - if (!$c) { - exec 'adnshost','+Do','+Dt','+Dc','-Cf',"-t$type", - '-',"$domain."; - die "$0: exec adnshost: $!\n"; +sub qualify ($) { + my ($i) = @_; + $i= "$default_dir$i" unless $i =~ m,^/,; + return $i; +} + +sub zone_conf ($$$$$@) { + my ($zone,$style,$sabbr,$mod,$file,@servers) = @_; + my ($sfx,$aref); + $file= qualify("$slave_dir/$slave_prefix".$zone.$slave_suffix) + unless length $file; + if (!length $output) { + $default_output= qualify('chiark-conf-gen.bind8') + unless length $default_output; + set_output($default_output); } - @result= ; - chomp @result; - $!=0; close ADH; - die "$0: lookup -t$type $domain failed $? $!\n" if $? or $!; - return @result; + cfg_fail("redefined zone $zone\n". + " earlier definition $zone_cfg{$zone}{'where'}") + if exists $zone_cfg{$zone}; + $zone_cfg{$zone}{'where'}= $where; + $zone_cfg{$zone}{'file'}= $file; + $zone_cfg{$zone}{'style_p'}= $style.$mod; + $zone_cfg{$zone}{'s'}= $sabbr.$mod; # p)rimary s)econdary u)npub f)oreign + $zone_cfg{$zone}{'servers'}= [ @servers ]; + foreach $sfx (qw(soa ns addr)) { + { no strict 'refs'; $aref= [ @{ "self_$sfx" } ]; } + @$aref or cfg_fail("failed to specify self-$sfx before zone"); + $zone_cfg{$zone}{"self_$sfx"}= $aref; + } + $zone_cfg{$zone}{'output'}= $output; + push @zone_cfg_list, $zone; } -sub lookup1 ($$) { - my ($type,$domain) = @_; - my (@result)= lookup($type,$domain); - @result==1 or die "$0: lookup -t$type $domain gave more than one RR\n"; - return $result[0]; +sub set_output($) { + my ($newout) = @_; + $output= $newout; + $output_contents{$output}= ''; } -sub check () { - return unless $check; - eval { - $soa= lookup1('soa',$zone); - $soa_origin=$soa; $soa_origin =~ s/ .*//; - $soa_origin_addr= lookup1('a',$soa_origin); - @zone_ns= lookup('ns-',$zone); +#-------------------- checking - @ok_sources= ($soa_origin_addr); - $ok_sources_descr= "SOA ORIGIN $soa_origin [$soa_origin_addr]"; +use vars qw($zone $cfg $warnings); +$warnings= 0; - if ($style eq 'unoff' || $style eq 'backup') { - for $zone_ns (@zone_ns) { - @zone_ns_addrs= lookup('a',$zone_ns); - push @ok_sources, @zone_ns_addrs; - $ok_sources_descr.= ", NS $zone_ns [@zone_ns_addrs]"; - } +sub progress ($) { + return if !$verbosity; + print "$_[0]\n"; +} + +sub verbose ($) { + return if $verbosity<2; + print " $_[0]\n"; +} + +sub process_zones (@) { + my (@zones) = @_; + local ($zone,$cfg); + + foreach $zone (@zones) { + $cfg= $zone_cfg{$zone} || { + 'style_p' => 'foreign', + 's' => 'f', + 'servers' => [ ], + }; + progress(sprintf "%-40s %s", $zone, $$cfg{'style_p'}); + if ($check && ($doall || $cfg->{'s'} !~ m/\?/)) { + eval { + if ($localonly && $cfg->{'s'} =~ m/f/) { + zone_warning("foreign zone specified with -l"); + } elsif ($cfg->{'s'} =~ m/\*/ || + ($localonly && $cfg->{'s'} !~ m/p/)) { + zone_check_local(); + } else { + zone_check_full(); + } + }; + zone_warning("checks failed: $@") if length $@; + } + $output_contents{$$cfg{'output'}} .= zone_output() + if $install; + } + print STDERR "$quis: $warnings warnings\n" or die $! + if $warnings; +} + +sub zone_warning ($) { + my ($w) = @_; + $w =~ s/\n$//; + $w =~ s,\n, // ,g; + print STDERR "$zone: warning: $w\n" or die $!; + $warnings++; +} + +sub zone_warnmore ($) { + print STDERR "$zone: $_[0]\n" or die $!; +} + +use vars qw(%delgs); # $delgs{$nameserver_list} = [ $whosaidandwhy ] +use vars qw(%auths); # $auths{$nameserver_list} = [ $whosaidandwhy ] +use vars qw(%glue); # $glue{$name}{$addr_list} = [ $whosaidandwhy ] +use vars qw(%soas); # $soa{"$origin $serial"} = [ $whosaidandwhy ] +use vars qw(%addr_is_ok %warned_glueless %warned_mynameaddr); +use vars qw($delg_to_us); +use vars qw(@to_check); # ($addr,$whyask,$is_auth,$glueless_ok, ...) +use vars qw(@to_check_soa); # ($addr,$whyask, ...) + +sub zone_check_full () { + zone_reset(); + zone_investigate(); + zone_consistency(); + zone_servers_ok(); +} + +sub zone_reset() { + %delgs= %auths= %glue= %soas= + %warned_glueless= %warned_mynameaddr= + %addr_is_ok= (); + $delg_to_us= 0; + @to_check= @to_check_soa= (); +} + +sub zone_investigate() { + my ($super_zone, @super_nsnames, + $super_ns, @super_ns_addrs, $s, $wa, $is_auth, + %nsrrset_checked, %soa_checked, $addr, $glueless_ok, $rcode); + + $super_zone= $zone; + for (;;) { + debug_trace("zone $zone superzone $super_zone"); + $super_zone =~ s/^[^.]+\.// or die "no superzone ? ($super_zone)\n"; + ($rcode,@super_nsnames)= lookup($super_zone,'ns-','06'); + last if !$rcode; + } + for $super_ns (@super_nsnames) { + $super_ns= lc $super_ns; + ($rcode,@super_ns_addrs)= lookup($super_ns,'a','0'); + foreach $addr (@super_ns_addrs) { + push @to_check, + $addr, + "$super_ns, server for $super_zone", + 0, 0; } + } + for (;;) { + # We do these in order so that we always do NS RRset checks on + # nameservers that came from other NS RRsets first; otherwise + # we might set nsrrset_checked due to a glueless_ok check, + # and then not check for gluefulness later. + debug_dump('@to_check @to_check_soa'); + if (($addr,$wa,$is_auth,$glueless_ok,@to_check) = @to_check) { + push @to_check_soa, $addr, $wa if $is_auth; + next if $nsrrset_checked{$addr}++; + zone_check_nsrrset($addr, "[$addr] $wa", + $is_auth, $glueless_ok); + } elsif (($addr,$wa,@to_check_soa) = @to_check_soa) { + next if $soa_checked{$addr}++; + zone_check_soa($addr,"[$addr] $wa","[$addr] NS"); + } else { + last; + } + } +} - for $server (@servers) { - grep { $server eq $_ } @ok_sources - or warn "secondarying from $server which is not ". - "$ok_sources_desc\n"; +sub zone_check_nsrrset ($$$$) { + my ($uaddr,$ww, $is_auth, $glueless_ok) = @_; + my (@s, $s, %s2g, @glue, $glue, $delgs_or_auths, $wwn); + verbose("checking delegation by $ww"); + dig(sub { + if ($dig_type eq 'ns' && $dig_owner eq $zone) { + $s2g{lc $dig_rdata} = [ ]; + } elsif ($dig_type eq 'a' && exists $s2g{$dig_owner}) { + $wwn= "in glue from $ww"; + push @to_check, $dig_rdata, "$dig_owner, $wwn", 1, 0; + zone_server_addr($dig_rdata,$dig_owner,$wwn,"NS [$uaddr]",0); + push @{ $s2g{$dig_owner} }, $dig_rdata; + } + }, + $zone,'ns',$uaddr); + if (!%s2g) { zone_warning("unable to find NS RRset at $ww"); return; } + elsif (keys %s2g == 1) { zone_warning("only one nameserver at $ww"); } + @s= sort keys %s2g; + foreach $s (@s) { + @glue= @{ $s2g{$s} }; + if (!@glue) { + zone_warning("glueless NS $s,". + ($needglue<=1 ? " (eg)" : ""). + " from $ww") + unless $glueless_ok || !$needglue || + ($needglue<=1 && $warned_glueless{$s}++); + next; } + $glue= join ' ', sort @glue; + push @{ $glue{$s}{$glue} }, $ww; + } + $s= join ' ', @s; + $delgs_or_auths= $is_auth ? \%auths : \%delgs; + push @{ $delgs_or_auths->{$s} }, $ww; +} + +sub zone_server_addr ($$$$$) { + my ($addr,$name,$ww,$wwq,$is_soa) = @_; + $addr_is_ok{$addr}= "$name ($wwq)" + if $is_soa || $cfg->{'s'} =~ m/u/; + zone_warning("configured as stealth but we [$addr]". + " are published ($name $wwq)") + if $cfg->{'s'} =~ m/u/ && grep { $_ eq $addr } @self_addr; + + my ($name_is_self, $addr_is_self); + $name_is_self= grep { $_ eq $name } + @{ $cfg->{$is_soa ? 'self_soa' : 'self_ns'} }; + $addr_is_self= grep { $_ eq $addr } + @{ $cfg->{'self_addr'} }; + if ($name_is_self && !$addr_is_self) { + zone_warning("our name $name with wrong address [$addr], (eg) $ww") + unless $warned_mynameaddr{$name}{$addr}++; + } elsif (!$name_is_self && $addr_is_self) { + zone_warning(($is_soa ? "SOA ORIGIN maps to" : "allegedly served by"). + " us [$addr] with wrong name $name, (eg) $ww") + unless $warned_mynameaddr{$name}{$addr}++; + } + $delg_to_us=1 if $name_is_self; +} - if ($style eq 'secondary') { - grep { $zone_ns=$_, grep { $myname eq $_ } @mynames } @zone_n - or warn "supposedly published secondary but we ". - "(@mynames) are not published ($@zone_ns)\n"; +sub zone_check_soa ($$$) { + my ($uaddr,$ww,$wwq) = @_; + my ($lame,$origin,$got,$rcode,@soa_addrs,$soa_addr,$wwn); + verbose("checking service at $wwq"); + $lame= 'dead or lame'; + dig(sub { + if ($dig_type eq 'flags:') { + $lame= $dig_rdata =~ m/ aa / ? '' : 'lame'; + } elsif ($dig_type eq 'soa' && $dig_owner eq $zone && !$lame) { + die "several SOAs ? $ww" if defined $origin; + $got= $dig_rdata; + $got =~ m/^(\S+) \d+/ or die "$got ?"; + $origin= $1; } + }, + $zone,'soa',$uaddr); + $lame= 'broken' if !$lame && !defined $origin; + if ($lame) { zone_warning("$lame server $ww"); return; } + push @{ $soas{$got} }, $ww; + ($rcode,@soa_addrs)= lookup($origin,'a','0'); + foreach $soa_addr (@soa_addrs) { + $wwn= "SOA ORIGIN from $ww"; + zone_server_addr($soa_addr,$origin,$wwn,"SOA [$uaddr]",1); + push @to_check, $soa_addr, "$origin, $wwn"; } - check_after_eval(); - +} - -# $superzone= $zone; $superzone =~ s/^[^\.]+\.//; -# @super_ns= lookup('ns-',$zone); +sub zone_consistency() { + my ($d, $org_ser, $origin, $a, $h, $self_soa); + zone_consistency_set('delegations',\%delgs); + foreach $d (keys %delgs) { delete $auths{$d}; } + zone_consistency_set('zone nameserver rrset',\%auths); + foreach $h (keys %glue) { + zone_consistency_set("glue for $h", $glue{$h}); + } + zone_consistency_set("SOA ORIGIN and SERIAL",\%soas); + $self_soa= $cfg->{'self_soa'}; + if ($cfg->{'s'} =~ m/p/) { + foreach $org_ser (keys %soas) { + $org_ser =~ m/^(\S+) \d+$/ or die "$org_ser ?"; + $origin= $1; + next if grep { $_ eq $origin } @$self_soa; + zone_warning("SOA ORIGIN $origin is not our name (@$self_soa),". + " eg from ".($soas{$org_ser}[0])); + } } +} - eval { - - for $super_ns (@super_ns) { - @deleg_ns= (); - open DIG, "dig @$super_ns. -t ns +norecurse $zone." - or die "$0: fork for dig: $!\n"; - while () { - - - split /\n/, lookup(" - - case "$style" in - secondary|backup) - if [ $meadvert = 0 ] - then - warning "$myname unlisted NS $nsnames" - fi - ;; - unoff) - if $meadvert = 0 - then - warning "$myname advertised NS $nsnames" - fi - ;; - esac - - addrs='' - for ns in $names - do - set -e; a="`host -t a \"$ns\".`"; set +e - taddrs="`echo \" $a\" | expand | sed -n ' - 1s/^ // - s/^[^ ][^ ]* *A *\([0-9][.0-9]*\)/\1/p - '`" - equlines "A $ns" "$a" "$taddrs" - addrs="$addrs $taddrs" - done - fi - - cat <{'servers'} }) { + next if exists $addr_is_ok{$a}; + zone_warning("we slave from $a"); $showok=1; + } + if ($showok) { + foreach $a (keys %addr_is_ok) { + zone_warnmore("permitted master [$a] $addr_is_ok{$a}"); + } + } + } + if ($cfg->{'s'} =~ m/s/ && !$delg_to_us) { + zone_warning("we are supposedly published secondary,". + " but not listed as a nameserver"); + } +} - -chdir "$base/primary" or die "$0: chdir $base/primary: $!"; -beginfile('primary.zones'); +sub zone_consistency_set ($%) { + my ($msg,$set) = @_; + my ($d,$o); + if (keys(%$set) > 1) { + zone_warning("inconsistent $msg:"); + foreach $d (keys %$set) { + foreach $o (@{ $set->{$d} }) { zone_warnmore(" $d from $o"); } + } + } +} -for $f (<*_db>) { - $zone= $f; $zone =~ s/_db$//; - +sub zone_check_local () { + zone_reset(); + zone_servers_simplefind(); + zone_servers_ok(); +} -for f in $zones -do - zone="`echo $f | sed -e 's/_db$//'`" - cat < $toopen" or die "$0: begin $currentfile_opened: $!\n"; + ($rcode,@soas)= lookup($zone,'soa','0'); + die "multiple SOA RRs in set! @soas ?" if @soas!=1; + $soas[0] =~ m/^(\S+)\s/ or die "SOA ? $_"; + zone_server_simple(domain_canon($1),'SOA',1); } -endfile () { - close CFF or die "$0: close $currentfile_opened: $!\n"; - push @files, $currentfile; +sub zone_server_simple ($$$) { + my ($name,$ww,$is_soa) = @_; + my ($rcode,@addrs,$addr); + ($rcode,@addrs)= lookup($name,'a','0'); + foreach $addr (@addrs) { zone_server_addr($addr,$name,$ww,$ww,$is_soa); } } -sub installfiles () { - return unless $install; - chdir $conf or die "$0: chdir $conf: $!\n"; - for $f (@files) { - rename "$f.new", $f or die "$0: install new $f: $!\n"; +#-------------------- outputting + +sub zone_output () { + my ($o); + + $o= "zone \"$zone\" {\n"; + if ($$cfg{'s'} =~ m/p/) { + $o.= " type master\n"; + } else { + $o.= " type slave\n". + " masters {\n"; + foreach $m (@{ $cfg{'servers'} }) { $o.= " $m;\n"; } + $o.= " };\n"; } + return $o; } -warning () { - echo >&2 "$zone $style: $*" - warnings=$[$warnings+1] +sub output_files () { + my ($fn,$ofn,$mfn,$l,$dir, $maxmode,$h,@to_install); + + foreach $ofn (keys %output_contents) { + $fn= $ofn; $mfn= "output file $fn"; + for (;;) { + if (!lstat $fn) { + $! == &ENOENT or die "$quis: stat $mfn:\n $!\n"; + $maxmode= 0666; + last; + } elsif (-f _) { + $maxmode= (stat _)[2]; + last; + } elsif (-l _) { + defined($l= readlink $fn) + or die "$quis: readlink $mfn:\n $!\n"; + $dir= $fn =~ m,^.*/, ? $& : './'; + $fn= "$dir$l" unless $l =~ m,^/,; + $mfn= "output file $fn (symlink target of $ofn)"; + } else { + die "$quis: output file $mfn exists but is not a file". + " (or symlink to one)"; + } + } + unlink "$fn.new" or $! == &ENOENT or + die "$quis: cannot clear out old .new version of $mfn:\n $!"; + $h= new IO::File "$fn.new",'w',$maxmode + or die("$quis: create .new version of $mfn:\n $!"); + print $h + "# generated by $quis, do not edit\n", + $output_contents{$ofn} + or die "$quis: write data to .new version of $mfn:\n $!"; + $h->close + or die "$quis: close .new version of $mfn:\n $!"; + push @to_install, $fn,$mfn; + } + + while (($fn,$mfn, @to_install) = @to_install) { + rename "$fn.new",$fn + or die "$quis: install new version of $mfn:\n $!"; + } } -equlines () { - if [ "x`echo \" $2\" | wc -l`" != "x`echo \" $3\" | wc -l`" ] - then - warning "$1 >$2|$3<" - fi +#-------------------- general utilities + +sub debug_dump ($) { + my ($vn); + return unless $debug>1; + local $Data::Dumper::Terse=1; + foreach $vn (split /\s+/, $_[0]) { + print "$vn := ", eval "Dumper(\\$vn)"; + } } -checkhostout () { - set +e - hostout="`host $1 \"$zone\" 2>&1 >/dev/null $2 | egrep -v \ -'^ \!\!\! .* SOA primary .* is not advertised via NS$'`" - set -e - if [ "x$hostout" = x ]; then return; fi - if $hostfirstwarn - then - warning "warnings from host:" - hostfirstwarn=0 - fi - echo >&2 "$hostout" +sub debug_trace ($) { + return unless $debug; + print "D $_[0]\n"; } -progress () { - if $progress - then - echo -n "$zone $style " >&2 - echo -ne '\r' >&2 - fi +sub lookup ($$$) { + my ($domain,$type,$okrcodes) = @_; + my ($c,$h,@result); + debug_trace("lookup ==> (->$okrcodes) $domain $type"); + $h= new IO::Handle; + + defined($c= open $h, "-|") or die "$quis: fork adnshost:\n $!\n"; + if (!$c) { + exec 'adnshost','-Fi','+Do','+Dt','+Dc','-Cf',"-t$type", + '-',"$domain."; + die "$quis: exec adnshost:\n $!\n"; + } + @result= $h->getlines(); + $h->error and die "$quis: read from adnshost:\n $!\n"; + chomp @result; + $!=0; $h->close; + die "$quis: lookup -t$type $domain $okrcodes failed $? $! @result\n" + if $! or $?>6 or index($okrcodes,$?)<0; + debug_trace("lookup <== $? @result"); + return ($?,@result); } -myname='' -if [ $warnings != 0 ] -then - echo >&2 "$warnings warnings " -fi +sub dig (&$$$) { + my ($eachrr, $qowner,$qtype,$qaddr) = @_; + # also pseudo-rr with type `flags:' + my ($h,$inmid,$irdata,$c); + local ($_); -installfiles + debug_trace("dig ==> \@$qaddr $qowner $qtype"); + + $h= new IO::Handle; + defined($c= open $h, "-|") or die "$quis: fork dig:\n $!\n"; + if (!$c) { + open STDERR, ">&STDOUT" or die $!; + exec ('dig', + '+nodef','+nosea','+nodebug','+norecurse', + "\@$qaddr",'-t',$qtype,$qowner); + die "$quis: exec dig:\n $!\n"; + } + $inmid=''; + for (;;) { + if (!defined($_= $h->getline())) { + $h->error() and die "$quis: read from dig:\n $!\n"; + last; + } + chomp; + if (length $inmid) { + s/^\s+/ / or die "$inmid // $_ ?"; + s/\;.*$//; + $_= $inmid.$_; + $inmid=''; + s/$/ \(/ unless s/\s*\)\s*$//; + } + if (s/\s*\(\s*$//) { $inmid= $_; next; } + if (m/^\;\; flags\:( [-0-9a-z ]+)\;/) { + $dig_owner=''; $dig_type='flags:'; $dig_rdata= "$1 "; + debug_trace("dig f: $dig_rdata"); + &$eachrr; + } elsif (m/^\;/) { + } elsif (!m/\S/) { + } elsif (m/^([-.0-9a-z]+)\s+\d\w+\s+in\s+([a-z]+)\s+(\S.*)/i) { + $dig_owner=domain_canon($1); $dig_type=lc $2; $irdata=$3; + if ($dig_type eq 'a') { + $irdata =~ m/^[.0-9]+$/ or die "$irdata ?"; + $dig_rdata= $&; + } elsif ($dig_type eq 'ns') { + $irdata =~ m/^[-.0-9a-z]+$/i or die "bad nameserver $irdata ?"; + $dig_rdata= domain_canon($irdata); + } elsif ($dig_type eq 'soa') { + $irdata =~ m/^([-.0-9a-z]+)\s+.*\s+(\d+)(?:\s+\d\w+){4}$/i + or die "bad SOA $irdata ?"; + $dig_rdata= domain_canon($1).' '.$2; + } else { + debug_trace("ignoring uknown RR type $dig_type"); + next; + } + debug_trace("dig $dig_owner $dig_type $dig_rdata"); + &$eachrr; + } else { + debug_trace("ignoring unknown dig output $_"); + } + } + $h->close; + debug_trace("dig <== gave $?"); +} + +sub domain_canon ($) { + local ($_) = @_; + s/(.)\.$/$1/; + die "domain $_ ?" unless m/^[0-9a-z]/i; + return lc $_; +}