--- loncom/loncron	2021/02/01 01:33:17	1.103.2.10
+++ loncom/loncron	2020/05/06 14:31:59	1.123
@@ -2,7 +2,7 @@
 
 # Housekeeping program, started by cron, loncontrol and loncron.pl
 #
-# $Id: loncron,v 1.103.2.10 2021/02/01 01:33:17 raeburn Exp $
+# $Id: loncron,v 1.123 2020/05/06 14:31:59 raeburn Exp $
 #
 # Copyright Michigan State University Board of Trustees
 #
@@ -34,15 +34,16 @@ use lib '/home/httpd/lib/perl/';
 use LONCAPA::Configuration;
 use LONCAPA::Checksumming;
 use LONCAPA;
+use LONCAPA::LWPReq;
 use Apache::lonnet;
 use Apache::loncommon;
 
-use LWP::UserAgent();
-use HTTP::Request();
 use IO::File;
 use IO::Socket;
 use HTML::Entities;
 use Getopt::Long;
+use GDBM_File;
+use Storable qw(thaw);
 use File::ReadBackwards;
 use File::Copy;
 use Sys::Hostname::FQDN();
@@ -79,14 +80,14 @@ sub rotate_logfile {
 	rename("$file.2","$file.3");
 	rename("$file.1","$file.2");
 	rename("$file","$file.1");
-    }
+    } 
 }
 
 sub start_daemon {
     my ($fh,$daemon,$pidfile,$args) = @_;
     my $progname=$daemon;
     if ($daemon eq 'lonc') {
-	$progname='loncnew';
+	$progname='loncnew'; 
     }
     my $error_fname="$perlvar{'lonDaemons'}/logs/${daemon}_errors";
     &rotate_logfile($error_fname,$fh,'error logs');
@@ -120,7 +121,7 @@ sub checkon_daemon {
     if ($fh) {
         if (-e "$perlvar{'lonDaemons'}/logs/$daemon.log"){
 	    if (open(DFH,"tail -n25 $perlvar{'lonDaemons'}/logs/$daemon.log|")) {
-	        while (my $line=<DFH>) {
+	        while (my $line=<DFH>) { 
 	            &log($fh,"$line");
 	            if ($line=~/INFO/) { $notices++; }
 	            if ($line=~/WARNING/) { $notices++; }
@@ -131,9 +132,9 @@ sub checkon_daemon {
         }
         &log($fh,"</tt></p>");
     }
-
+    
     my $pidfile="$perlvar{'lonDaemons'}/logs/$daemon.pid";
- 
+    
     my $restartflag=1;
     my $daemonpid;
     if (-e $pidfile) {
@@ -172,6 +173,9 @@ sub checkon_daemon {
 	&log($fh,unlink($pidfile).' - '.
 	    `killall -9 $kadaemon 2>&1`.
 	    '</font><br />');
+        if ($kadaemon eq 'loncnew') {
+            &clean_lonc_childpids();
+        }
 	&log($fh,"<h3>$daemon not running, trying to start</h3>");
 
 	if (&start_daemon($fh,$daemon,$pidfile,$args)) {
@@ -210,10 +214,10 @@ sub checkon_daemon {
 	            close (DFH);
                 }
 	        &log($fh,"</pre></p>");
-	    }
-        }
+            }
+	}
     }
-
+    
     my $fname="$perlvar{'lonDaemons'}/logs/$daemon.log";
     &rotate_logfile($fname,$fh,'logs');
 
@@ -226,34 +230,19 @@ sub log_machine_info {
     my ($fh)=@_;
     &log($fh,'<hr /><a name="machine" /><h2>Machine Information</h2>');
     &log($fh,"<h3>loadavg</h3>");
-
-    my $cpucount;
-    if (open(PIPE,"lscpu |grep '^CPU(s)' 2>&1 |")) {
-        my $info = <PIPE>;
-        chomp($info);
-        ($cpucount) = ($info =~ /^\QCPU(s):\E\s+(\d+)$/);
-        close(PIPE);
-    }
-    if (!$cpucount) {
-        $cpucount = 1;
-    }
-    my %loadtarget = (
-                        error => 4.0*$cpucount,
-                        warn  => 2.0*$cpucount,
-                        note  => 1.0*$cpucount,
-                     );
+	
     open (LOADAVGH,"/proc/loadavg");
     my $loadavg=<LOADAVGH>;
     close (LOADAVGH);
-
+    
     &log($fh,"<tt>$loadavg</tt>");
-
+    
     my @parts=split(/\s+/,$loadavg);
-    if ($parts[1]>$loadtarget{'error'}) {
+    if ($parts[1]>4.0) {
 	$errors++;
-    } elsif ($parts[1]>$loadtarget{'warn'}) {
+    } elsif ($parts[1]>2.0) {
 	$warnings++;
-    } elsif ($parts[1]>$loadtarget{'note'}) {
+    } elsif ($parts[1]>1.0) {
 	$notices++;
     }
 
@@ -261,14 +250,14 @@ sub log_machine_info {
     &log($fh,"<pre>");
 
     open (DFH,"df|");
-    while (my $line=<DFH>) {
-	&log($fh,&encode_entities($line,'<>&"'));
+    while (my $line=<DFH>) { 
+	&log($fh,&encode_entities($line,'<>&"')); 
 	@parts=split(/\s+/,$line);
 	my $usage=$parts[4];
 	$usage=~s/\W//g;
-	if ($usage>90) {
+	if ($usage>90) { 
 	    $warnings++;
-	    $notices++;
+	    $notices++; 
 	} elsif ($usage>80) {
 	    $warnings++;
 	} elsif ($usage>60) {
@@ -285,8 +274,8 @@ sub log_machine_info {
     my $psproc=0;
 
     open (PSH,"ps aux --cols 140 |");
-    while (my $line=<PSH>) {
-	&log($fh,&encode_entities($line,'<>&"'));
+    while (my $line=<PSH>) { 
+	&log($fh,&encode_entities($line,'<>&"')); 
 	$psproc++;
     }
     close (PSH);
@@ -308,7 +297,7 @@ sub start_logging {
     my %simplestatus=();
     my $now=time;
     my $date=localtime($now);
-
+    
 
     &log($fh,(<<ENDHEADERS));
 <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
@@ -424,12 +413,12 @@ sub recursive_clean_tmp {
                 ($cleaned,$old,$removed) = 
                      &recursive_clean_tmp($innerdir,$cleaned,$old,$removed,$errors);
                 my @doms = &Apache::lonnet::current_machine_domains();
-
+                
                 if (open(my $dirhandle,$fname)) {
                     unless (($innerdir eq 'helprequests') ||
                             (($innerdir =~ /^addcourse/) && ($innerdir !~ m{/\d+$}))) {
                         my @contents = grep {!/^\.\.?$/} readdir($dirhandle);
-                                      join('&&',@contents)."\n";
+                                      join('&&',@contents)."\n";    
                         if (scalar(grep {!/^\.\.?$/} readdir($dirhandle)) == 0) {
                             closedir($dirhandle);
                             if ($fname =~ m{^\Q$perlvar{'lonDaemons'}\E/tmp/}) {
@@ -482,7 +471,7 @@ sub recursive_clean_tmp {
                                 }
                             }
                         } elsif (ref($errors->{failopen}) eq 'ARRAY') {
-                            push(@{$errors->{failopen}},$fname);
+                            push(@{$errors->{failopen}},$fname); 
                         }
                     } else {
                         if (unlink($fname)) {
@@ -553,7 +542,7 @@ sub clean_balanceIDs {
     my $cleaned=0;
     my $active=0;
     if (-d $perlvar{'lonBalanceDir'}) {
-        while (my $fname=<$perlvar{'lonBalanceDir'}/*.id>) {
+        while (my $fname=<$perlvar{'balanceDir'}/*.id>) {
             my ($dev,$ino,$mode,$nlink,
                 $uid,$gid,$rdev,$size,
                 $atime,$mtime,$ctime,
@@ -599,6 +588,34 @@ sub clean_webDAV_sessionIDs {
     }
 }
 
+# ------------------------------------------------------------ clean out ltiIDs
+
+sub clean_ltiIDs {
+    my ($fh)=@_;
+    &log($fh,'<hr /><a name="ltisessions" /><h2>LTI Session Pointers</h2>');
+    my $cleaned=0;
+    my $active=0;
+    if (-d $perlvar{'ltiIDsDir'}) {
+        while (my $fname=<$perlvar{'ltiIDsDir'}/*>) {
+            my ($dev,$ino,$mode,$nlink,
+                $uid,$gid,$rdev,$size,
+                $atime,$mtime,$ctime,
+                $blksize,$blocks)=stat($fname);
+            my $now=time;
+            my $since=$now-$mtime;
+            if ($since>$perlvar{'lonExpire'}) {
+                $cleaned++;
+                &log($fh,"Unlinking $fname<br />");
+                unlink("$fname");
+            } else {
+                $active++;
+            }
+        }
+    }
+    &log($fh,"<p>Cleaned up ".$cleaned." old LTI session pointers.</p>");
+    &log($fh,"<h3>$active unexpired LTI session pointers</h3>");
+}
+
 # ----------------------------------------------------------- clean out sockets
 sub clean_sockets {
     my ($fh)=@_;
@@ -636,16 +653,16 @@ sub rotate_lonnet_logs {
     print "Checking logs.\n";
     if (-e "$perlvar{'lonDaemons'}/logs/lonnet.log"){
 	open (DFH,"tail -n50 $perlvar{'lonDaemons'}/logs/lonnet.log|");
-	while (my $line=<DFH>) {
+	while (my $line=<DFH>) { 
 	    &log($fh,&encode_entities($line,'<>&"'));
 	}
 	close (DFH);
     }
     &log($fh,"</pre><h3>Perm Log</h3><pre>");
-
+    
     if (-e "$perlvar{'lonDaemons'}/logs/lonnet.perm.log") {
 	open(DFH,"tail -n10 $perlvar{'lonDaemons'}/logs/lonnet.perm.log|");
-	while (my $line=<DFH>) {
+	while (my $line=<DFH>) { 
 	    &log($fh,&encode_entities($line,'<>&"'));
 	}
 	close (DFH);
@@ -776,14 +793,14 @@ sub check_delayed_msg {
     my $dfh=IO::File->new("$perlvar{'lonDaemons'}/logs/lonnet.perm.log","r");
     if (defined($dfh)) {
         while (my $line=<$dfh>) {
-	    my ($time,$sdf,$rest)=split(/:/,$line,3);
+            my ($time,$sdf,$rest)=split(/:/,$line,3);
             if ($time < 1541185772) {
                 $checkbackwards = 1;
             }
             last;
         }
         undef $dfh;
-    }
+    } 
 
     if ($checkbackwards) {
         if (tie *BW, 'File::ReadBackwards', "$perlvar{'lonDaemons'}/logs/lonnet.perm.log") {
@@ -1015,7 +1032,7 @@ sub write_serverhomeIDs {
                 eval {
                     local $SIG{ ALRM } = sub { die "TIMEOUT" };
                     alarm(10);
-                    $serverhomeID =
+                    $serverhomeID = 
                         &Apache::lonnet::get_server_homeID($name,1,'loncron');
                     alarm(0);
                 };
@@ -1148,6 +1165,91 @@ sub write_hostips {
     return;
 }
 
+sub clean_nosslverify {
+    my ($fh) = @_;
+    my %unlinked; 
+    if (-d "$perlvar{'lonSockDir'}/nosslverify") {
+        if (opendir(my $dh,"$perlvar{'lonSockDir'}/nosslverify")) {
+            while (my $fname=readdir($dh)) {
+                next if ($fname =~ /^\.+$/);
+                if (unlink("/home/httpd/sockets/nosslverify/$fname")) {
+                    &log($fh,"Unlinking $fname<br />");
+                    $unlinked{$fname} = 1;
+                }
+            }
+            closedir($dh);
+        }
+    }
+    &log($fh,"<p>Removed ".scalar(keys(%unlinked))." nosslverify clients</p>");
+    return %unlinked;
+}
+sub clean_lonc_childpids {
+    my $childpiddir = "$perlvar{'lonDocRoot'}/lon-status/loncchld";
+    if (-d $childpiddir) {
+        if (opendir(my $dh,$childpiddir)) {
+            while (my $fname=readdir($dh)) {
+                next if ($fname =~ /^\.+$/);
+                unlink("$childpiddir/$fname");
+            }
+            closedir($dh);
+        }
+    }
+}
+
+sub write_connection_config {
+    my ($domconf,%connectssl,%changes);
+    $domconf = &get_domain_config();
+    if (ref($domconf) eq 'HASH') {
+        if (ref($domconf->{'ssl'}) eq 'HASH') {
+            foreach my $connect ('connto','connfrom') {
+                if (ref($domconf->{'ssl'}->{$connect}) eq 'HASH') {
+                    my ($sslreq,$sslnoreq,$currsetting);
+                    my %contypes;
+                    foreach my $type ('dom','intdom','other') {
+                        $connectssl{$connect.'_'.$type} = $domconf->{'ssl'}->{$connect}->{$type};
+                    }
+                }
+            }
+        }
+        if (keys(%connectssl)) {
+            my %currconf; 
+            if (open(my $fh,'<',"$perlvar{'lonTabDir'}/connectionrules.tab")) {
+                while (my $line = <$fh>) {
+                    chomp($line);
+                    my ($name,$value) = split(/=/,$line);
+                    if ($value =~ /^(?:no|yes|req)$/) {
+                        if ($name =~ /^conn(to|from)_(dom|intdom|other)$/) {
+                            $currconf{$name} = $value;
+                        }
+                    }
+                }
+                close($fh);
+            }
+            if (open(my $fh,'>',"$perlvar{'lonTabDir'}/connectionrules.tab")) {
+                my $count = 0;
+                foreach my $key (sort(keys(%connectssl))) { 
+                    print $fh "$key=$connectssl{$key}\n";
+                    if (exists($currconf{$key})) {
+                        unless ($currconf{$key} eq $connectssl{$key}) {
+                            $changes{$key} = 1;
+                        }
+                    } else {
+                        $changes{$key} = 1;
+                    }
+                    $count ++;
+                }
+                close($fh);
+                print "Completed writing SSL options for lonc/lond for $count items.\n";
+            }
+        } else {
+            print "Writing of SSL options skipped - no connection rules in domain configuration.\n";
+        }
+    } else {
+        print "Retrieval of SSL options for lonc/lond skipped - no configuration data available for domain.\n";
+    }
+    return %changes;
+}
+
 sub get_domain_config {
     my ($dom,$primlibserv,$isprimary,$url,%confhash);
     $dom = $perlvar{'lonDefDomain'};
@@ -1181,10 +1283,8 @@ sub get_domain_config {
             }
         }
     } else {
-        my $ua=new LWP::UserAgent;
-        $ua->timeout(5);
         my $request=new HTTP::Request('GET',$url);
-        my $response=$ua->request($request);
+        my $response=&LONCAPA::LWPReq::makerequest($primlibserv,$request,'',\%perlvar,5);
         unless ($response->is_error()) {
             my $content = $response->content;
             if ($content) {
@@ -1205,6 +1305,121 @@ sub get_domain_config {
     return \%confhash;
 }
 
+sub write_hosttypes {
+    my %intdom = &Apache::lonnet::all_host_intdom();
+    my %hostdom = &Apache::lonnet::all_host_domain();
+    my $dom = $hostdom{$perlvar{'lonHostID'}};
+    my $internetdom = $intdom{$perlvar{'lonHostID'}};
+    my %changes;
+    if (($dom ne '') && ($internetdom ne '')) {
+        if (keys(%hostdom)) {
+            my %currhosttypes;
+            if (open(my $fh,'<',"$perlvar{'lonTabDir'}/hosttypes.tab")) {
+                while (my $line = <$fh>) {
+                    chomp($line);
+                    my ($name,$value) = split(/:/,$line);
+                    if (($name ne '') && ($value =~ /^(dom|intdom|other)$/)) {
+                        $currhosttypes{$name} = $value;
+                    }
+                }
+                close($fh);
+            }
+            if (open(my $fh,'>',"$perlvar{'lonTabDir'}/hosttypes.tab")) {
+                my $count = 0;
+                foreach my $lonid (sort(keys(%hostdom))) {
+                    my $type = 'other';
+                    if ($hostdom{$lonid} eq $dom) {
+                        $type = 'dom'; 
+                    } elsif ($intdom{$lonid} eq $internetdom) {
+                        $type = 'intdom';
+                    }
+                    print $fh "$lonid:$type\n";
+                    if (exists($currhosttypes{$lonid})) {
+                        if ($type ne $currhosttypes{$lonid}) {
+                            $changes{$lonid} = 1;
+                        }
+                    } else {
+                        $changes{$lonid} = 1;
+                    }
+                    $count ++;
+                }
+                close($fh);
+                print "Completed writing host type data for $count hosts.\n";
+            }
+        } else {
+            print "Writing of host types skipped - no hosts found.\n";
+        }
+    } else {
+        print "Writing of host types skipped - could not determine this host's LON-CAPA domain or 'internet' domain.\n";
+    }
+    return %changes;
+}
+
+sub update_revocation_list {
+    my ($result,$changed) = &Apache::lonnet::fetch_crl_pemfile();
+    if ($result eq 'ok') {
+        print "Certificate Revocation List (from CA) updated.\n";
+    } else {
+        print "Certificate Revocation List from (CA) not updated.\n";
+    }
+    return $changed;
+}
+
+sub reset_nosslverify_pids {
+    my ($fh,%sslrem) = @_;
+    &checkon_daemon($fh,'lond',40000,'USR2');
+    my $loncpidfile="$perlvar{'lonDaemons'}/logs/lonc.pid";
+    my $loncppid;
+    if ((-e $loncpidfile) && (open(my $pfh,'<',$loncpidfile))) {
+        $loncppid=<$pfh>;
+        chomp($loncppid);
+        close($pfh);
+        if ($loncppid =~ /^\d+$/) {
+            my %pids_by_host;
+            my $docdir = $perlvar{'lonDocRoot'};
+            if (-d "$docdir/lon-status/loncchld") {
+                if (opendir(my $dh,"$docdir/lon-status/loncchld")) {
+                    while (my $file = readdir($dh)) {
+                        next if ($file =~ /^\./);
+                        if (open(my $fh,'<',"$docdir/lon-status/loncchld/$file")) {
+                            my $record = <$fh>;
+                            chomp($record);
+                            close($fh);
+                            my ($remotehost,$authmode) = split(/:/,$record);
+                            $pids_by_host{$remotehost}{$authmode}{$file} = 1;
+                        }
+                    }
+                    closedir($dh);
+                    if (keys(%pids_by_host)) {
+                        foreach my $host (keys(%pids_by_host)) {
+                            if ($sslrem{$host}) {
+                                if (ref($pids_by_host{$host}) eq 'HASH') {
+                                    if (ref($pids_by_host{$host}{'insecure'}) eq 'HASH') {
+                                        if (keys(%{$pids_by_host{$host}{'insecure'}})) {
+                                            foreach my $pid (keys(%{$pids_by_host{$host}{'insecure'}})) {
+                                                if (open(PIPE,"ps -o ppid= -p $pid |")) {
+                                                    my $ppid = <PIPE>;
+                                                    chomp($ppid);
+                                                    close(PIPE);
+                                                    $ppid =~ s/(^\s+|\s+$)//g;
+                                                    if (($ppid == $loncppid) && (kill 0 => $pid)) {
+                                                        kill QUIT => $pid;
+                                                    }
+                                                }
+                                            }
+                                        }
+                                    }
+                                }
+                            }
+                        }
+                    }
+                }
+            }
+        }
+    }
+    return;
+}
+
 sub get_permcount_settings {
     my ($domconf) = @_;
     my ($defaults,$names) = &Apache::loncommon::lon_status_items();
@@ -1393,7 +1608,7 @@ sub main () {
         &Apache::lonnet::get_iphost(1,$nomemcache);
     }
 
-# ----------------------------------------- Force firewall update for lond port
+# ----------------------------------------- Force firewall update for lond port  
 
     if ((!$justcheckdaemons) && (!$justreload)) {
         my $now = time;
@@ -1408,7 +1623,7 @@ sub main () {
             if (&LONCAPA::try_to_lock('/tmp/lock_lciptables')) {
                 my $execpath = $perlvar{'lonDaemons'}.'/lciptables';
                 system("$execpath $tmpfile");
-                unlink('/tmp/lock_lciptables');  # Remove the lock file.
+                unlink('/tmp/lock_lciptables');  # Remove the lock file. 
             }
             unlink($tmpfile);
         }
@@ -1420,7 +1635,7 @@ sub main () {
     $warnings=0;
     $notices=0;
 
-
+	
     my $fh;
     if (!$justcheckdaemons && !$justcheckconnections && !$justreload && !$justiptables) {
 	$fh=&start_logging();
@@ -1430,6 +1645,7 @@ sub main () {
 	&clean_lonIDs($fh);
         &clean_balanceIDs($fh);
         &clean_webDAV_sessionIDs($fh);
+        &clean_ltiIDs($fh);
 	&check_httpd_logs($fh);
 	&rotate_lonnet_logs($fh);
 	&rotate_other_logs($fh);
@@ -1445,6 +1661,10 @@ sub main () {
         &checkon_daemon($fh,'lonr',40000);
     }
     if ($justreload) {
+        &clean_nosslverify($fh);
+        &write_connection_config();
+        &write_hosttypes();
+        &update_revocation_list(); 
 	&checkon_daemon($fh,'lond',40000,'USR2');
 	&checkon_daemon($fh,'lonc',40000,'USR2');
     }
@@ -1456,12 +1676,21 @@ sub main () {
         my ($threshold,$sysmail,$reportstatus,$weightsref,$exclusionsref) =
             &get_permcount_settings($domconf);
 	&check_delayed_msg($fh,$weightsref,$exclusionsref);
-	&finish_logging($fh,$weightsref);
-	&log_simplestatus();
         &write_loncaparevs();
         &write_serverhomeIDs();
 	&write_checksums();
         &write_hostips();
+        my %sslrem = &clean_nosslverify($fh);
+        my %conchgs = &write_connection_config();
+        my %hosttypechgs = &write_hosttypes();
+        my $hadcrlchg = &update_revocation_list();
+        if ((keys(%conchgs) > 0) || (keys(%hosttypechgs) > 0) ||
+            $hadcrlchg || (keys(%sslrem) > 0)) {
+            &checkon_daemon($fh,'lond',40000,'USR2');
+            &reset_nosslverify_pids($fh,%sslrem);
+        }
+        &finish_logging($fh,$weightsref);
+        &log_simplestatus();
         if ($totalcount>$threshold && !$noemail) { &send_mail($sysmail,$reportstatus); }
     }
 }