--- loncom/lonnet/perl/lonnet.pm 2020/11/24 16:57:37 1.1172.2.118.2.12
+++ loncom/lonnet/perl/lonnet.pm 2020/09/08 01:19:47 1.1172.2.125
@@ -1,7 +1,7 @@
# The LearningOnline Network
# TCP networking package
#
-# $Id: lonnet.pm,v 1.1172.2.118.2.12 2020/11/24 16:57:37 raeburn Exp $
+# $Id: lonnet.pm,v 1.1172.2.125 2020/09/08 01:19:47 raeburn Exp $
#
# Copyright Michigan State University Board of Trustees
#
@@ -1082,21 +1082,6 @@ sub check_for_balancer_cookie {
return ($otherserver,$cookie);
}
-sub updatebalcookie {
- my ($cookie,$balancer,$lastentry)=@_;
- if ($cookie =~ /^($match_domain)\_($match_username)\_[a-f0-9]{32}$/) {
- my ($udom,$uname) = ($1,$2);
- my $uprimary_id = &domain($udom,'primary');
- my $uintdom = &internet_dom($uprimary_id);
- my $intdom = &internet_dom($balancer);
- my $serverhomedom = &host_domain($balancer);
- if (($uintdom ne '') && ($uintdom eq $intdom)) {
- return &reply('updatebalcookie:'.&escape($cookie).':'.&escape($lastentry),$balancer);
- }
- }
- return;
-}
-
sub delbalcookie {
my ($cookie,$balancer) =@_;
if ($cookie =~ /^($match_domain)\_($match_username)\_[a-f0-9]{32}$/) {
@@ -1106,7 +1091,7 @@ sub delbalcookie {
my $intdom = &internet_dom($balancer);
my $serverhomedom = &host_domain($balancer);
if (($uintdom ne '') && ($uintdom eq $intdom)) {
- return &reply('delbalcookie:'.&escape($cookie),$balancer);
+ return &reply("delbalcookie:$cookie",$balancer);
}
}
}
@@ -1593,7 +1578,7 @@ sub check_loadbalancing {
if ($domneedscache) {
&do_cache_new('loadbalancing',$domneedscache,$is_balancer,$cachetime);
}
- if (($is_balancer) && ($caller ne 'switchserver')) {
+ if ($is_balancer) {
my $lowest_load = 30000;
if (ref($offloadto) eq 'HASH') {
if (ref($offloadto->{'primary'}) eq 'ARRAY') {
@@ -1633,9 +1618,9 @@ sub check_loadbalancing {
}
}
}
- }
- if (($is_balancer) && (!$homeintdom)) {
- undef($setcookie);
+ unless ($homeintdom) {
+ undef($setcookie);
+ }
}
return ($is_balancer,$otherserver,$setcookie);
}
@@ -1888,12 +1873,7 @@ sub get_dom {
}
}
if ($udom && $uhome && ($uhome ne 'no_host')) {
- my $rep;
- if ($namespace =~ /^enc/) {
- $rep=&reply("encrypt:egetdom:$udom:$namespace:$items",$uhome);
- } else {
- $rep=&reply("getdom:$udom:$namespace:$items",$uhome);
- }
+ my $rep=&reply("getdom:$udom:$namespace:$items",$uhome);
my %returnhash;
if ($rep eq '' || $rep =~ /^error: 2 /) {
return %returnhash;
@@ -1937,11 +1917,7 @@ sub put_dom {
$items.=&escape($item).'='.&freeze_escape($$storehash{$item}).'&';
}
$items=~s/\&$//;
- if ($namespace =~ /^enc/) {
- return &reply("encrypt:putdom:$udom:$namespace:$items",$uhome);
- } else {
- return &reply("putdom:$udom:$namespace:$items",$uhome);
- }
+ return &reply("putdom:$udom:$namespace:$items",$uhome);
} else {
&logthis("put_dom failed - no homeserver and/or domain");
}
@@ -2558,22 +2534,6 @@ sub get_passwdconf {
return %passwdconf;
}
-sub course_portal_url {
- my ($cnum,$cdom) = @_;
- my $chome = &homeserver($cnum,$cdom);
- my $hostname = &hostname($chome);
- my $protocol = $protocol{$chome};
- $protocol = 'http' if ($protocol ne 'https');
- my %domdefaults = &get_domain_defaults($cdom);
- my $firsturl;
- if ($domdefaults{'portal_def'}) {
- $firsturl = $domdefaults{'portal_def'};
- } else {
- $firsturl = $protocol.'://'.$hostname;
- }
- return $firsturl;
-}
-
# --------------------------------------------------- Assign a key to a student
sub assign_access_key {
@@ -3461,14 +3421,6 @@ sub can_edit_resource {
$cfile = '/adm/wrapper'.$resurl;
}
}
- } elsif ($resurl =~ m{^/adm/wrapper/adm/$cdom/$cnum/\d+/ext\.tool$}) {
- $incourse = 1;
- if ($env{'form.forceedit'}) {
- $forceview = 1;
- } else {
- $forceedit = 1;
- }
- $cfile = $resurl;
} elsif ($resurl =~ m{^/?adm/viewclasslist$}) {
$incourse = 1;
if ($env{'form.forceedit'}) {
@@ -3493,14 +3445,6 @@ sub can_edit_resource {
$forceedit = 1;
}
$cfile = $resurl;
- } elsif (($resurl =~ m{^/adm/wrapper/adm/$cdom/$cnum/\d+/ext\.tool$}) && ($env{'form.folderpath'} =~ /^supplemental/)) {
- $incourse = 1;
- if ($env{'form.forceedit'}) {
- $forceview = 1;
- } else {
- $forceedit = 1;
- }
- $cfile = $resurl;
} elsif (($resurl eq '/adm/extresedit') && ($symb || $env{'form.folderpath'})) {
$incourse = 1;
$forceview = 1;
@@ -3510,13 +3454,8 @@ sub can_edit_resource {
$cfile = &clutter($res);
} else {
$cfile = $env{'form.suppurl'};
- my $escfile = &unescape($cfile);
- if ($escfile =~ m{^/adm/$cdom/$cnum/\d+/ext\.tool$}) {
- $cfile = '/adm/wrapper'.$escfile;
- } else {
- $escfile =~ s{^http://}{};
- $cfile = &escape("/adm/wrapper/ext/$escfile");
- }
+ $cfile =~ s{^http://}{};
+ $cfile = '/adm/wrapper/ext/'.$cfile;
}
} elsif ($resurl =~ m{^/?adm/viewclasslist$}) {
if ($env{'form.forceedit'}) {
@@ -4733,11 +4672,7 @@ sub courseacclog {
if ($formitem =~ /^HWFILE(?:SIZE|TOOBIG)/) {
$what.=':'.$formitem.'='.$env{$key};
} elsif ($formitem !~ /^HWFILE(?:[^.]+)$/) {
- if ($formitem eq 'proctorpassword') {
- $what.=':'.$formitem.'=' . '*' x length($env{$key});
- } else {
- $what.=':'.$formitem.'='.$env{$key};
- }
+ $what.=':'.$formitem.'='.$env{$key};
}
}
}
@@ -5493,10 +5428,9 @@ my %cachedtimes=();
my $cachedtime='';
sub load_all_first_access {
- my ($uname,$udom,$ignorecache)=@_;
+ my ($uname,$udom)=@_;
if (($cachedkey eq $uname.':'.$udom) &&
- (abs($cachedtime-time)<5) && (!$env{'form.markaccess'}) &&
- (!$ignorecache)) {
+ (abs($cachedtime-time)<5) && (!$env{'form.markaccess'})) {
return;
}
$cachedtime=time;
@@ -5505,7 +5439,7 @@ sub load_all_first_access {
}
sub get_first_access {
- my ($type,$argsymb,$argmap,$ignorecache)=@_;
+ my ($type,$argsymb,$argmap)=@_;
my ($symb,$courseid,$udom,$uname)=&whichuser();
if ($argsymb) { $symb=$argsymb; }
my ($map,$id,$res)=&decode_symb($symb);
@@ -5517,7 +5451,7 @@ sub get_first_access {
} else {
$res=$symb;
}
- &load_all_first_access($uname,$udom,$ignorecache);
+ &load_all_first_access($uname,$udom);
return $cachedtimes{"$courseid\0$res"};
}
@@ -6934,7 +6868,7 @@ sub currentdump {
#
my %returnhash=();
#
- if ($rep eq 'unknown_cmd') {
+ if ($rep eq "unknown_cmd") {
# an old lond will not know currentdump
# Do a dump and make it look like a currentdump
my @tmp = &dumpstore($courseid,$sdom,$sname,'.');
@@ -7850,7 +7784,7 @@ sub customaccess {
# ------------------------------------------------- Check for a user privilege
sub allowed {
- my ($priv,$uri,$symb,$role,$clientip,$noblockcheck,$ignorecache)=@_;
+ my ($priv,$uri,$symb,$role,$clientip,$noblockcheck)=@_;
my $ver_orguri=$uri;
$uri=&deversion($uri);
my $orguri=$uri;
@@ -7867,7 +7801,7 @@ sub allowed {
if (defined($env{'allowed.'.$priv})) { return $env{'allowed.'.$priv}; }
# Free bre access to adm and meta resources
- if (((($uri=~/^adm\//) && ($uri !~ m{/(?:smppg|bulletinboard|ext\.tool)$}))
+ if (((($uri=~/^adm\//) && ($uri !~ m{/(?:smppg|bulletinboard)$}))
|| (($uri=~/\.meta$/) && ($uri!~m|^uploaded/|) ))
&& ($priv eq 'bre')) {
return 'F';
@@ -8075,7 +8009,7 @@ sub allowed {
if ($noblockcheck) {
$thisallowed.=$value;
} else {
- my @blockers = &has_comm_blocking($priv,$symb,$uri,$ignorecache);
+ my @blockers = &has_comm_blocking($priv,$symb,$uri);
if (@blockers > 0) {
$thisallowed = 'B';
} else {
@@ -8095,7 +8029,7 @@ sub allowed {
if ($noblockcheck) {
$thisallowed='F';
} else {
- my @blockers = &has_comm_blocking($priv,'',$refuri,'',1);
+ my @blockers = &has_comm_blocking($priv,$symb,$refuri);
if (@blockers > 0) {
$thisallowed = 'B';
} else {
@@ -8114,7 +8048,7 @@ sub allowed {
&& &is_portfolio_url($uri)) {
$thisallowed = &portfolio_access($uri,$clientip);
}
-
+
# Full access at system, domain or course-wide level? Exit.
if ($thisallowed=~/F/) {
return 'F';
@@ -8168,7 +8102,7 @@ sub allowed {
if ($noblockcheck) {
$thisallowed.=$value;
} else {
- my @blockers = &has_comm_blocking($priv,$symb,$uri,$ignorecache);
+ my @blockers = &has_comm_blocking($priv,$symb,$uri);
if (@blockers > 0) {
$thisallowed = 'B';
} else {
@@ -8181,7 +8115,7 @@ sub allowed {
$checkreferer=0;
}
}
-
+
if ($checkreferer) {
my $refuri=$env{'httpref.'.$orguri};
unless ($refuri) {
@@ -8210,7 +8144,7 @@ sub allowed {
if ($noblockcheck) {
$thisallowed.=$value;
} else {
- my @blockers = &has_comm_blocking($priv,'',$refuri,'',1);
+ my @blockers = &has_comm_blocking($priv,$symb,$refuri);
if (@blockers > 0) {
$thisallowed = 'B';
} else {
@@ -8296,7 +8230,7 @@ sub allowed {
}
}
}
-
+
#
# Rest of the restrictions depend on selected course
#
@@ -8454,27 +8388,22 @@ sub constructaccess {
#
# User for whom data are being temporarily cached.
my $cacheduser='';
-# Course for which data are being temporarily cached.
-my $cachedcid='';
# Cached blockers for this user (a hash of blocking items).
my %cachedblockers=();
# When the data were last cached.
my $cachedlast='';
sub load_all_blockers {
- my ($uname,$udom)=@_;
+ my ($uname,$udom,$blocks)=@_;
if (($uname ne '') && ($udom ne '')) {
if (($cacheduser eq $uname.':'.$udom) &&
- ($cachedcid eq $env{'request.course.id'}) &&
(abs($cachedlast-time)<5)) {
return;
}
}
$cachedlast=time;
$cacheduser=$uname.':'.$udom;
- $cachedcid=$env{'request.course.id'};
- %cachedblockers = &get_commblock_resources();
- return;
+ %cachedblockers = &get_commblock_resources($blocks);
}
sub get_comm_blocks {
@@ -8554,23 +8483,14 @@ sub get_commblock_resources {
if ($mapsymb) {
if (ref($navmap)) {
my $mapres = $navmap->getBySymb($mapsymb);
- if (ref($mapres)) {
- my $first = $mapres->map_start();
- my $finish = $mapres->map_finish();
- my $it = $navmap->getIterator($first,$finish,undef,0,0);
- if (ref($it)) {
- my $res;
- while ($res = $it->next(undef,1)) {
- next unless (ref($res));
- my $symb = $res->symb();
- next if (($symb eq $mapsymb) || ($symb eq ''));
- @interval=&EXT("resource.0.interval",$symb);
- if ($interval[1] eq 'map') {
- if ($res->answerable()) {
- push(@to_test,$res);
- last;
- }
- }
+ @to_test = $mapres->retrieveResources($mapres,undef,0,0,0,1);
+ foreach my $res (@to_test) {
+ my $symb = $res->symb();
+ next if ($symb eq $mapsymb);
+ if ($symb ne '') {
+ @interval=&EXT("resource.0.interval",$symb);
+ if ($interval[1] eq 'map') {
+ last;
}
}
}
@@ -8578,8 +8498,7 @@ sub get_commblock_resources {
}
}
}
- if ($interval[0] =~ /^(\d+)/) {
- my $timelimit = $1;
+ if ($interval[0] =~ /^\d+$/) {
my $first_access;
if ($type eq 'resource') {
$first_access=&get_first_access($interval[1],$item);
@@ -8589,7 +8508,7 @@ sub get_commblock_resources {
$first_access=&get_first_access($interval[1]);
}
if ($first_access) {
- my $timesup = $first_access+$timelimit;
+ my $timesup = $first_access+$interval[0];
if ($timesup > $now) {
my $activeblock;
foreach my $res (@to_test) {
@@ -8621,23 +8540,17 @@ sub get_commblock_resources {
}
sub has_comm_blocking {
- my ($priv,$symb,$uri,$ignoresymbdb,$noenccheck,$blocked,$blocks) = @_;
+ my ($priv,$symb,$uri,$blocks) = @_;
my @blockers;
return unless ($env{'request.course.id'});
return unless ($priv eq 'bre');
return if ($env{'user.priv.'.$env{'request.role'}} =~/evb\&([^\:]*)/);
return if ($env{'request.state'} eq 'construct');
- my %blockinfo;
- if (ref($blocks) eq 'HASH') {
- %blockinfo = &get_commblock_resources($blocks);
- } else {
- &load_all_blockers($env{'user.name'},$env{'user.domain'});
- %blockinfo = %cachedblockers;
- }
- return unless (keys(%blockinfo) > 0);
+ &load_all_blockers($env{'user.name'},$env{'user.domain'},$blocks);
+ return unless (keys(%cachedblockers) > 0);
my (%possibles,@symbs);
if (!$symb) {
- $symb = &symbread($uri,1,1,1,\%possibles,$ignoresymbdb,$noenccheck);
+ $symb = &symbread($uri,1,1,1,\%possibles);
}
if ($symb) {
@symbs = ($symb);
@@ -8648,38 +8561,34 @@ sub has_comm_blocking {
foreach my $symb (@symbs) {
last if ($noblock);
my ($map,$resid,$resurl)=&decode_symb($symb);
- foreach my $block (keys(%blockinfo)) {
+ foreach my $block (keys(%cachedblockers)) {
if ($block =~ /^firstaccess____(.+)$/) {
my $item = $1;
- unless ($blocked) {
- if (($item eq $map) || ($item eq $symb)) {
- $noblock = 1;
- last;
- }
+ if (($item eq $map) || ($item eq $symb)) {
+ $noblock = 1;
+ last;
}
}
- if (ref($blockinfo{$block}) eq 'HASH') {
- if (ref($blockinfo{$block}{'resources'}) eq 'HASH') {
- if ($blockinfo{$block}{'resources'}{$symb}) {
+ if (ref($cachedblockers{$block}) eq 'HASH') {
+ if (ref($cachedblockers{$block}{'resources'}) eq 'HASH') {
+ if ($cachedblockers{$block}{'resources'}{$symb}) {
unless (grep(/^\Q$block\E$/,@blockers)) {
push(@blockers,$block);
}
}
}
- if (ref($blockinfo{$block}{'maps'}) eq 'HASH') {
- if ($blockinfo{$block}{'maps'}{$map}) {
- unless (grep(/^\Q$block\E$/,@blockers)) {
- push(@blockers,$block);
- }
+ }
+ if (ref($cachedblockers{$block}{'maps'}) eq 'HASH') {
+ if ($cachedblockers{$block}{'maps'}{$map}) {
+ unless (grep(/^\Q$block\E$/,@blockers)) {
+ push(@blockers,$block);
}
}
}
}
}
- unless ($noblock) {
- return @blockers;
- }
- return;
+ return if ($noblock);
+ return @blockers;
}
}
@@ -10325,19 +10234,14 @@ sub writecoursepref {
sub createcourse {
my ($udom,$description,$url,$course_server,$nonstandard,$inst_code,
- $course_owner,$crstype,$cnum,$context,$category,$callercontext)=@_;
+ $course_owner,$crstype,$cnum,$context,$category)=@_;
$url=&declutter($url);
my $cid='';
if ($context eq 'requestcourses') {
my $can_create = 0;
my ($ownername,$ownerdom) = split(':',$course_owner);
if ($udom eq $ownerdom) {
- my $reload;
- if (($callercontext eq 'auto') &&
- ($ownerdom eq $env{'user.domain'}) && ($ownername eq $env{'user.name'})) {
- $reload = 'reload';
- }
- if (&usertools_access($ownername,$ownerdom,$category,$reload,
+ if (&usertools_access($ownername,$ownerdom,$category,undef,
$context)) {
$can_create = 1;
}
@@ -11346,7 +11250,7 @@ sub get_userresdata {
# Parameters:
# $name - Course/user name.
# $domain - Name of the domain the user/course is registered on.
-# $type - Type of thing $name is (must be 'course' or 'user')
+# $type - Type of thing $name is (must be 'course' or 'user'
# @which - Array of names of resources desired.
# Returns:
# The value of the first reasource in @which that is found in the
@@ -11367,47 +11271,11 @@ sub resdata {
foreach my $item (@which) {
if (defined($result->{$item->[0]})) {
return [$result->{$item->[0]},$item->[1]];
- }
+ }
}
return undef;
}
-sub get_domain_lti {
- my ($cdom,$context) = @_;
- my ($name,%lti);
- if ($context eq 'consumer') {
- $name = 'ltitools';
- } elsif ($context eq 'provider') {
- $name = 'lti';
- } else {
- return %lti;
- }
- my ($result,$cached)=&is_cached_new($name,$cdom);
- if (defined($cached)) {
- if (ref($result) eq 'HASH') {
- %lti = %{$result};
- }
- } else {
- my %domconfig = &get_dom('configuration',[$name],$cdom);
- if (ref($domconfig{$name}) eq 'HASH') {
- %lti = %{$domconfig{$name}};
- my %encdomconfig = &get_dom('encconfig',[$name],$cdom);
- if (ref($encdomconfig{$name}) eq 'HASH') {
- foreach my $id (keys(%lti)) {
- if (ref($encdomconfig{$name}{$id}) eq 'HASH') {
- foreach my $item ('key','secret') {
- $lti{$id}{$item} = $encdomconfig{$name}{$id}{$item};
- }
- }
- }
- }
- }
- my $cachetime = 24*60*60;
- &do_cache_new($name,$cdom,\%lti,$cachetime);
- }
- return %lti;
-}
-
sub get_numsuppfiles {
my ($cnum,$cdom,$ignorecache)=@_;
my $hashid=$cnum.':'.$cdom;
@@ -11863,7 +11731,7 @@ sub metadata {
# if it is a non metadata possible uri return quickly
if (($uri eq '') ||
(($uri =~ m|^/*adm/|) &&
- ($uri !~ m|^adm/includes|) && ($uri !~ m{/(smppg|bulletinboard|ext\.tool)$})) ||
+ ($uri !~ m|^adm/includes|) && ($uri !~ m{/(smppg|bulletinboard)$})) ||
($uri =~ m|/$|) || ($uri =~ m|/.meta$|) || ($uri =~ m{^/*uploaded/.+\.sequence$})) {
return undef;
}
@@ -12559,16 +12427,13 @@ sub deversion {
# ------------------------------------------------------ Return symb list entry
sub symbread {
- my ($thisfn,$donotrecurse,$ignorecachednull,$checkforblock,$possibles,
- $ignoresymbdb,$noenccheck)=@_;
+ my ($thisfn,$donotrecurse,$ignorecachednull,$checkforblock,$possibles)=@_;
my $cache_str='request.symbread.cached.'.$thisfn;
if (defined($env{$cache_str})) {
- unless (ref($possibles) eq 'HASH') {
- if ($ignorecachednull) {
- return $env{$cache_str} unless ($env{$cache_str} eq '');
- } else {
- return $env{$cache_str};
- }
+ if ($ignorecachednull) {
+ return $env{$cache_str} unless ($env{$cache_str} eq '');
+ } else {
+ return $env{$cache_str};
}
}
# no filename provided? try from environment
@@ -12597,18 +12462,10 @@ sub symbread {
if ($targetfn =~ m|^adm/wrapper/(ext/.*)|) {
$targetfn=$1;
}
- unless ($ignoresymbdb) {
- if (tie(%hash,'GDBM_File',$env{'request.course.fn'}.'_symb.db',
- &GDBM_READER(),0640)) {
- $syval=$hash{$targetfn};
- untie(%hash);
- }
- if ($syval && $checkforblock) {
- my @blockers = &has_comm_blocking('bre',$syval,$thisfn,$ignoresymbdb,$noenccheck);
- if (@blockers) {
- $syval='';
- }
- }
+ if (tie(%hash,'GDBM_File',$env{'request.course.fn'}.'_symb.db',
+ &GDBM_READER(),0640)) {
+ $syval=$hash{$targetfn};
+ untie(%hash);
}
# ---------------------------------------------------------- There was an entry
if ($syval) {
@@ -12641,18 +12498,13 @@ sub symbread {
$syval=&encode_symb($bighash{'map_id_'.$mapid},
$resid,$thisfn);
if (ref($possibles) eq 'HASH') {
- unless ($bighash{'randomout_'.$ids} || $env{'request.role.adv'}) {
- $possibles->{$syval} = 1;
- }
+ $possibles->{$syval} = 1;
}
if ($checkforblock) {
- unless ($bighash{'randomout_'.$ids} || $env{'request.role.adv'}) {
- my @blockers = &has_comm_blocking('bre',$syval,$bighash{'src_'.$ids},'',$noenccheck);
- if (@blockers) {
- $syval = '';
- untie(%bighash);
- return $env{$cache_str}='';
- }
+ my @blockers = &has_comm_blocking('bre',$syval,$bighash{'src_'.$ids});
+ if (@blockers) {
+ $syval = '';
+ return;
}
}
} elsif ((!$donotrecurse) || ($checkforblock) || (ref($possibles) eq 'HASH')) {
@@ -12671,13 +12523,12 @@ sub symbread {
if ($bighash{'map_type_'.$mapid} ne 'page') {
my $poss_syval=&encode_symb($bighash{'map_id_'.$mapid},
$resid,$thisfn);
- next if ($bighash{'randomout_'.$id} && !$env{'request.role.adv'});
- next unless (($noenccheck) || ($bighash{'encrypted_'.$id} eq $env{'request.enc'}));
+ if (ref($possibles) eq 'HASH') {
+ $possibles->{$syval} = 1;
+ }
if ($checkforblock) {
- my @blockers = &has_comm_blocking('bre',$poss_syval,$file,'',$noenccheck);
- if (@blockers > 0) {
- $syval = '';
- } else {
+ my @blockers = &has_comm_blocking('bre',$poss_syval,$file);
+ unless (@blockers > 0) {
$syval = $poss_syval;
$realpossible++;
}
@@ -12685,11 +12536,6 @@ sub symbread {
$syval = $poss_syval;
$realpossible++;
}
- if ($syval) {
- if (ref($possibles) eq 'HASH') {
- $possibles->{$syval} = 1;
- }
- }
}
}
}
@@ -13540,8 +13386,6 @@ sub clutter {
# &logthis("Got a blank emb style");
}
}
- } elsif ($thisfn =~ m{^/adm/$match_domain/$match_courseid/\d+/ext\.tool$}) {
- $thisfn='/adm/wrapper'.$thisfn;
}
return $thisfn;
}