--- loncom/loncron	2020/05/06 13:34:22	1.122
+++ loncom/loncron	2024/12/25 02:32:47	1.137
@@ -2,7 +2,7 @@
 
 # Housekeeping program, started by cron, loncontrol and loncron.pl
 #
-# $Id: loncron,v 1.122 2020/05/06 13:34:22 raeburn Exp $
+# $Id: loncron,v 1.137 2024/12/25 02:32:47 raeburn Exp $
 #
 # Copyright Michigan State University Board of Trustees
 #
@@ -42,10 +42,12 @@ use IO::File;
 use IO::Socket;
 use HTML::Entities;
 use Getopt::Long;
-use GDBM_File;
+use GDBM_File qw(GDBM_READER);
 use Storable qw(thaw);
 use File::ReadBackwards;
 use File::Copy;
+use Sys::Hostname::FQDN();
+
 #globals
 use vars qw (%perlvar %simplestatus $errors $warnings $notices $totalcount);
 
@@ -78,14 +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,$fh,'error logs');
@@ -119,7 +121,7 @@ sub checkon_daemon {
     if ($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/) { $notices++; }
@@ -130,9 +132,9 @@ sub checkon_daemon {
         }
         &log($fh,"</tt></p>");
     }
-    
+
     my $pidfile="$perlvar{'lonDaemons'}/logs/$daemon.pid";
-    
+
     my $restartflag=1;
     my $daemonpid;
     if (-e $pidfile) {
@@ -204,7 +206,7 @@ sub checkon_daemon {
 	    if (-e "$perlvar{'lonDaemons'}/logs/$daemon.log"){
 	        &log($fh,"<p><pre>");
 	        if (open(DFH,"tail -n100 $perlvar{'lonDaemons'}/logs/$daemon.log|")) {
-	            while (my $line=<DFH>) { 
+	            while (my $line=<DFH>) {
 		        &log($fh,"$line");
 		        if ($line=~/WARNING/) { $notices++; }
 		        if ($line=~/CRITICAL/) { $notices++; }
@@ -215,7 +217,7 @@ sub checkon_daemon {
             }
 	}
     }
-    
+
     my $fname="$perlvar{'lonDaemons'}/logs/$daemon.log";
     &rotate_logfile($fname,$fh,'logs');
 
@@ -228,19 +230,34 @@ 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 ($parts[1]>4.0) {
+    if ($parts[1]>$loadtarget{'error'}) {
 	$errors++;
-    } elsif ($parts[1]>2.0) {
+    } elsif ($parts[1]>$loadtarget{'warn'}) {
 	$warnings++;
-    } elsif ($parts[1]>1.0) {
+    } elsif ($parts[1]>$loadtarget{'note'}) {
 	$notices++;
     }
 
@@ -248,14 +265,14 @@ 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) {
@@ -272,8 +289,8 @@ 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);
@@ -292,10 +309,10 @@ sub log_machine_info {
 
 sub start_logging {
     my $fh=IO::File->new(">$statusdir/newstatus.html");
-    my %simplestatus=();
+    %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">
@@ -320,6 +337,7 @@ sub start_logging {
 <li><a href="#lonc">lonc</a></li>
 <li><a href="#lonnet">lonnet</a></li>
 <li><a href="#connections">Connections</a></li>
+<li><a href="#bashconf">bash readline config</a></li>
 <li><a href="#delayed">Delayed Messages</a></li>
 <li><a href="#errcount">Error Count</a></li>
 </ol>
@@ -408,15 +426,15 @@ sub recursive_clean_tmp {
                 } else {
                     $innerdir = $subdir.'/'.$file;
                 }
-                ($cleaned,$old,$removed) = 
+                ($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$perlvar{'lonDaemons'}\E/tmp/}) {
@@ -454,7 +472,7 @@ sub recursive_clean_tmp {
                             if ($line=~/^CHECKOUTTOKEN\&/) {
                                 if ($since>365*$perlvar{'lonExpire'}) {
                                     if (unlink($fname)) {
-                                        $cleaned++; 
+                                        $cleaned++;
                                     } elsif (ref($errors->{file}) eq 'ARRAY') {
                                         push(@{$errors->{file}},$fname);
                                     }
@@ -469,7 +487,7 @@ sub recursive_clean_tmp {
                                 }
                             }
                         } elsif (ref($errors->{failopen}) eq 'ARRAY') {
-                            push(@{$errors->{failopen}},$fname); 
+                            push(@{$errors->{failopen}},$fname);
                         }
                     } else {
                         if (unlink($fname)) {
@@ -540,7 +558,7 @@ sub clean_balanceIDs {
     my $cleaned=0;
     my $active=0;
     if (-d $perlvar{'lonBalanceDir'}) {
-        while (my $fname=<$perlvar{'balanceDir'}/*.id>) {
+        while (my $fname=<$perlvar{'lonBalanceDir'}/*.id>) {
             my ($dev,$ino,$mode,$nlink,
                 $uid,$gid,$rdev,$size,
                 $atime,$mtime,$ctime,
@@ -620,7 +638,7 @@ sub clean_sockets {
     my $cleaned=0;
     opendir(SOCKETS,$perlvar{'lonSockDir'});
     while (my $fname=readdir(SOCKETS)) {
-	next if (-d $fname 
+	next if (-d $fname
 		 || $fname=~/(mysqlsock|maximasock|rsock|\Q$perlvar{'lonSockDir'}\E)/);
 	$cleaned++;
 	&log($fh,"Unlinking $fname<br />");
@@ -651,16 +669,16 @@ sub rotate_lonnet_logs {
     print "Checking logs.\n";
     if (-e "$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($line,'<>&"'));
 	}
 	close (DFH);
@@ -727,7 +745,7 @@ sub check_delayed_msg {
     my ($fh,$weightsref,$exclusionsref)=@_;
     &log($fh,'<hr /><a name="delayed" /><h2>Delayed Messages</h2>');
     print "Checking buffers.\n";
-    
+
     &log($fh,'<h3>Scanning Permanent Log</h3>');
 
     my $unsend=0;
@@ -798,7 +816,7 @@ sub check_delayed_msg {
             last;
         }
         undef $dfh;
-    } 
+    }
 
     if ($checkbackwards) {
         if (tie *BW, 'File::ReadBackwards', "$perlvar{'lonDaemons'}/logs/lonnet.perm.log") {
@@ -978,13 +996,17 @@ sub finish_logging {
 
 sub log_simplestatus {
     rename("$statusdir/newstatus.html","$statusdir/index.html");
-    
+
     my $sfh=IO::File->new(">$statusdir/loncron_simple.txt");
-    foreach (keys %simplestatus) {
-	print $sfh $_.'='.$simplestatus{$_}.'&';
+    if (defined($sfh)) {
+        foreach my $key (keys(%simplestatus)) {
+            print $sfh $key.'='.$simplestatus{$key}.'&';
+        }
+        print $sfh "\n";
+        $sfh->close();
+    } else {
+        print "Could not write to $statusdir/loncron_simple.txt\n";
     }
-    print $sfh "\n";
-    $sfh->close();
 }
 
 sub write_loncaparevs {
@@ -1002,7 +1024,7 @@ sub write_loncaparevs {
                 alarm(0);
             };
             if ($@ && $@ =~ m/TIMEOUT/) {
-                print "Time out while contacting lonHost: $id for version.\n";   
+                print "Time out while contacting lonHost: $id for version.\n";
             }
             if ($loncaparev =~ /^[\w.\-]+$/) {
                 $output .= $id.':'.$loncaparev."\n";
@@ -1010,10 +1032,12 @@ sub write_loncaparevs {
         }
     }
     if ($output) {
-        if (open(my $fh,">$perlvar{'lonTabDir'}/loncaparevs.tab")) {
+        if (open(my $fh,'>',"$perlvar{'lonTabDir'}/loncaparevs.tab")) {
             print $fh $output;
             close($fh);
             &Apache::lonnet::load_loncaparevs();
+        } else {
+            print "Could not write to $perlvar{'lonTabDir'}/loncaparevs.tab\n";
         }
     }
     return;
@@ -1030,12 +1054,12 @@ sub write_serverhomeIDs {
                 eval {
                     local $SIG{ ALRM } = sub { die "TIMEOUT" };
                     alarm(10);
-                    $serverhomeID = 
+                    $serverhomeID =
                         &Apache::lonnet::get_server_homeID($name,1,'loncron');
                     alarm(0);
                 };
                 if ($@ && $@ =~ m/TIMEOUT/) {
-                    print "Time out while contacting server: $name\n"; 
+                    print "Time out while contacting server: $name\n";
                 }
                 if ($serverhomeID ne '') {
                     $output .= $name.':'.$serverhomeID."\n";
@@ -1046,10 +1070,12 @@ sub write_serverhomeIDs {
         }
     }
     if ($output) {
-        if (open(my $fh,">$perlvar{'lonTabDir'}/serverhomeIDs.tab")) {
+        if (open(my $fh,'>',"$perlvar{'lonTabDir'}/serverhomeIDs.tab")) {
             print $fh $output;
             close($fh);
             &Apache::lonnet::load_serverhomeIDs();
+        } else {
+            print "Could not write to $perlvar{'lonTabDir'}/serverhomeIDs.tab\n";
         }
     }
     return;
@@ -1070,7 +1096,7 @@ sub write_checksums {
         }
         print "File version retrieved and checksumming completed for $numchksums files.\n";
     } else {
-        print "File version retrieval and checksumming skipped - could not determine Linux distro.\n"; 
+        print "File version retrieval and checksumming skipped - could not determine Linux distro.\n";
     }
     return;
 }
@@ -1110,6 +1136,8 @@ sub write_hostips {
             }
             close($fh);
             chmod(0644,$newfile);
+        } else {
+            print "Could not write to $lontabdir/currhostips.tab\n";
         }
     }
     if (keys(%prevhosts) && keys(%currhosts)) {
@@ -1135,6 +1163,8 @@ sub write_hostips {
                 }
                 print $fh "\n*******************\n\n";
                 close($fh);
+            } else {
+                print "Could not write to $perlvar{'lonDaemons'}/logs/hostip.log\n";
             }
             my $emailto = &Apache::loncommon::build_recipient_list(undef,
                                    'hostipmail',$defdom);
@@ -1165,7 +1195,7 @@ sub write_hostips {
 
 sub clean_nosslverify {
     my ($fh) = @_;
-    my %unlinked; 
+    my %unlinked;
     if (-d "$perlvar{'lonSockDir'}/nosslverify") {
         if (opendir(my $dh,"$perlvar{'lonSockDir'}/nosslverify")) {
             while (my $fname=readdir($dh)) {
@@ -1210,7 +1240,7 @@ sub write_connection_config {
             }
         }
         if (keys(%connectssl)) {
-            my %currconf; 
+            my %currconf;
             if (open(my $fh,'<',"$perlvar{'lonTabDir'}/connectionrules.tab")) {
                 while (my $line = <$fh>) {
                     chomp($line);
@@ -1225,7 +1255,7 @@ sub write_connection_config {
             }
             if (open(my $fh,'>',"$perlvar{'lonTabDir'}/connectionrules.tab")) {
                 my $count = 0;
-                foreach my $key (sort(keys(%connectssl))) { 
+                foreach my $key (sort(keys(%connectssl))) {
                     print $fh "$key=$connectssl{$key}\n";
                     if (exists($currconf{$key})) {
                         unless ($currconf{$key} eq $connectssl{$key}) {
@@ -1238,6 +1268,8 @@ sub write_connection_config {
                 }
                 close($fh);
                 print "Completed writing SSL options for lonc/lond for $count items.\n";
+            } else {
+                print "Could not write to $perlvar{'lonTabDir'}/connectionrules.tab\n";
             }
         } else {
             print "Writing of SSL options skipped - no connection rules in domain configuration.\n";
@@ -1327,7 +1359,7 @@ sub write_hosttypes {
                 foreach my $lonid (sort(keys(%hostdom))) {
                     my $type = 'other';
                     if ($hostdom{$lonid} eq $dom) {
-                        $type = 'dom'; 
+                        $type = 'dom';
                     } elsif ($intdom{$lonid} eq $internetdom) {
                         $type = 'intdom';
                     }
@@ -1343,6 +1375,8 @@ sub write_hosttypes {
                 }
                 close($fh);
                 print "Completed writing host type data for $count hosts.\n";
+            } else {
+                print "Could not write to $perlvar{'lonTabDir'}/hosttypes.tab\n";
             }
         } else {
             print "Writing of host types skipped - no hosts found.\n";
@@ -1474,6 +1508,158 @@ sub read_serverhomeIDs {
     return %server;
 }
 
+sub check_bash_settings {
+    my $distro = &LONCAPA::distro();
+    my ($check_bracketed_paste,$bracketed_warning);
+    if ($distro  =~ /^debian(\d+)$/) {
+        if ($1 >= 12) {
+            $check_bracketed_paste = 1;
+        }
+    } elsif ($distro =~ /^ubuntu(\d+)$/) {
+        if ($1 >= 22) {
+            $check_bracketed_paste = 1;
+        }
+    } elsif ($distro =~ /^(?:redhat|oracle|alma|rocky|centos-stream)(\d+)$/) {
+        if ($1 >= 9) {
+            $check_bracketed_paste = 1;
+        }
+    } elsif ($distro =~ /^fedora(\d+)/) {
+        if ($1 >= 34) {
+            $check_bracketed_paste = 1;
+        }
+    }
+    if ($check_bracketed_paste) {
+        if (open(PIPE,"bind -V 2>&1 | grep enable-bracketed-paste |")) {
+            my $info = <PIPE>;
+            chomp($info);
+            my ($bracketed) = ($info =~ /^\Qenable-bracketed-paste\E\s+is\s+set\s+to\s+\W(on|off)\W$/);
+            close(PIPE);
+            if ($bracketed eq 'on') {
+                $bracketed_warning = 1;
+            }
+        } else {
+            print "Unable to check if bracketed paste is set to off for www user's shell\n";
+        }
+    }
+    return ($bracketed_warning,$check_bracketed_paste);
+}
+
+sub set_bracketed_paste_off {
+    my $bash_www_cnf = '/home/www/.inputrc';
+    my $result;
+    if (!-e $bash_www_cnf) {
+        system("touch $bash_www_cnf");
+        if (open(my $cfh,'>',$bash_www_cnf)) {
+            print $cfh <<'END';
+$if R
+    set enable-bracketed-paste off
+$endif
+
+$if maxima
+    set enable-bracketed-paste off
+$endif
+END
+            close($cfh);
+            $result = "Updated $bash_www_cnf so enable-bracketed-paste is off for R bash shell";
+        } else {
+            $result = "Could not open $bash_www_cnf to add 'set enable-bracketed-paste to off'";
+        }
+        my $wwwuid = getpwnam('www');
+        my $wwwgid = getgrnam('www');
+        if ($wwwuid!=$<) {
+            chown($wwwuid,$wwwgid,$bash_www_cnf);
+        }
+    } else {
+        my (%bracketed_paste_on,%bracketed_paste_off,@preserve,$condition);
+        $condition = '';
+        if (open(my $cfh,'<',$bash_www_cnf)) {
+            while (my $line=<$cfh>) {
+                chomp($line);
+                if ($line =~ /^\$if\s+(\w+)\s*$/) {
+                    if ($1 eq 'R') {
+                        $condition = 'r';
+                    } elsif ($1 eq 'maxima') {
+                        $condition = 'maxima';
+                    } else {
+                        $condition = 'other';
+                    }
+                } elsif ($line =~ /^\$endif\s*$/) {
+                    $condition = '';
+                }
+                if ($line =~ /^\s*set\s+enable\-bracketed\-paste\s+(off|on)\s*$/) {
+                    if ($1 eq 'off') {
+                        if ($condition ne '') {
+                            $bracketed_paste_off{$condition} = 1;
+                        } else {
+                            $bracketed_paste_off{all} = 1;
+                        }
+                        push(@preserve,$line);
+                    } else {
+                        if ($condition ne '') {
+                            $bracketed_paste_on{$condition} = 1;
+                            if (($condition eq 'r') || ($condition eq 'maxima')) {
+                                push(@preserve,'    set enable-bracketed-paste off');
+                            } else {
+                                push(@preserve,$line);
+                            }
+                        } else {
+                            $bracketed_paste_on{all} = 1;
+                            push(@preserve,$line);
+                        }
+                    }
+                } else {
+                    push(@preserve,$line);
+                }
+            }
+            close($cfh);
+        } else {
+            $result = "Could not open $bash_www_cnf to check if a value is included for 'enable-bracketed-paste'.";
+        }
+        if (($bracketed_paste_on{r} || $bracketed_paste_on{maxima}) ||
+            (!exists($bracketed_paste_off{r}) && !exists($bracketed_paste_on{r}) &&
+             !exists($bracketed_paste_off{maxima}) && !exists($bracketed_paste_on{maxima}))) {
+            if (open(my $cfh,'>',$bash_www_cnf)) {
+                if (@preserve) {
+                    foreach my $entry (@preserve) {
+                        print $cfh "$entry\n";
+                    }
+                    if (!exists($bracketed_paste_off{r}) && !exists($bracketed_paste_on{r})) {
+print $cfh <<'END';
+$if R
+    set enable-bracketed-paste off
+$endif
+END
+                    }
+                    if (!exists($bracketed_paste_off{r}) && !exists($bracketed_paste_on{r})) {
+print $cfh <<'END';
+$if maxima
+    set enable-bracketed-paste off
+$endif
+END
+                    }
+                } else {
+print $cfh <<'END';
+$if R
+    set enable-bracketed-paste off
+$endif
+
+$if maxima
+    set enable-bracketed-paste off
+$endif
+END
+                }
+                close($cfh);
+                $result = "Updated $bash_www_cnf";
+            } else {
+                $result = "Could not open $bash_www_cnf to add 'set enable-bracketed-paste to off'";
+            }
+        } else {
+            $result = "No action needed; $bash_www_cnf already includes 'set enable-bracketed-paste to off'";
+        }
+    }
+    return $result;
+}
+
 sub send_mail {
     my ($sysmail,$reportstatus) = @_;
     my $defdom = $perlvar{'lonDefDomain'};
@@ -1496,7 +1682,7 @@ sub send_mail {
                       "Subject: ".$subj."\n".
                       "Content-type: text/html\; charset=UTF-8\n".
                       "MIME-Version: 1.0\n\n";
-    if (open(my $fh,"<$statusdir/index.html")) {
+    if (open(my $fh,'<',"$statusdir/index.html")) {
         while (<$fh>) {
             $loncronmail .= $_;
         }
@@ -1519,7 +1705,7 @@ sub usage {
 loncron - housekeeping program that checks up on various parts of LON-CAPA
 
 Options:
-   --help     Display 
+   --help     Display
    --noemail  Do not send the status email
    --justcheckconnections  Only check the current status of the lonc/d
                                 connections, do not send emails do not
@@ -1564,9 +1750,10 @@ sub main () {
     if ('{[[[[lonHostID]]]]}' eq $perlvar{'lonHostID'}) {
 	print("Unconfigured machine.\n");
 	my $emailto=$perlvar{'lonSysEMail'};
-	my $hostname=`/bin/hostname`;
-	chop $hostname;
-	$hostname=~s/[^\w\.]//g; # make sure is safe to pass through shell
+	my $hostname = Sys::Hostname::FQDN::fqdn();
+	$hostname=~s/\.+/./g;
+	$hostname=~s/\-+/-/g;
+	$hostname=~s/[^\w\.-]//g; # make sure is safe to pass through shell
 	my $subj="LON: Unconfigured machine $hostname";
 	system("echo 'Unconfigured machine $hostname.' |".
                " mail -s '$subj' $emailto > /dev/null");
@@ -1577,7 +1764,7 @@ sub main () {
     my $wwwid=getpwnam('www');
     if ($wwwid!=$<) {
 	print("User ID mismatch. This program must be run as user 'www'.\n");
-	my $emailto="$perlvar{'lonAdmEMail'},$perlvar{'lonSysEMail'}";
+	my $emailto="$perlvar{'lonAdmEMail'} $perlvar{'lonSysEMail'}";
 	my $subj="LON: $perlvar{'lonHostID'} User ID mismatch";
 	system("echo 'User ID mismatch. loncron must be run as user www.' |".
                " mail -s '$subj' $emailto > /dev/null");
@@ -1605,13 +1792,13 @@ sub main () {
         &Apache::lonnet::get_iphost(1,$nomemcache);
     }
 
-# ----------------------------------------- Force firewall update for lond port  
+# ----------------------------------------- Force firewall update for lond port
 
     if ((!$justcheckdaemons) && (!$justreload)) {
         my $now = time;
         my $tmpfile = $perlvar{'lonDaemons'}.'/tmp/lciptables_iphost_'.
                       $now.$$.int(rand(10000));
-        if (open(my $fh,">$tmpfile")) {
+        if (open(my $fh,'>',"$tmpfile")) {
             my %iphosts = &Apache::lonnet::get_iphost();
             foreach my $key (keys(%iphosts)) {
                 print $fh "$key\n";
@@ -1620,7 +1807,7 @@ 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);
         }
@@ -1632,7 +1819,7 @@ sub main () {
     $warnings=0;
     $notices=0;
 
-	
+
     my $fh;
     if (!$justcheckdaemons && !$justcheckconnections && !$justreload && !$justiptables) {
 	$fh=&start_logging();
@@ -1661,7 +1848,7 @@ sub main () {
         &clean_nosslverify($fh);
         &write_connection_config();
         &write_hosttypes();
-        &update_revocation_list(); 
+        &update_revocation_list();
 	&checkon_daemon($fh,'lond',40000,'USR2');
 	&checkon_daemon($fh,'lonc',40000,'USR2');
     }
@@ -1669,6 +1856,32 @@ sub main () {
 	&test_connections($fh);
     }
     if (!$justcheckdaemons && !$justcheckconnections && !$justreload && !$justiptables) {
+        my ($bracketed_warning,$check_bracketed_paste) = &check_bash_settings();
+        if ($check_bracketed_paste) {
+           &log($fh,'<hr /><a name="bashconf" /><h2>bash readline config</h2><h3>Bracketed Paste</h3>'.
+                '<p>Distros using bash readline library 8.1 or later need bracketed paste disabled for the R bash shell for the www user so R commands sent to lonr daemon will be processed.</p>');
+           my $bash_www_cnf = '/home/www/.inputrc';
+           my $non_empty_conffile;
+           unless ($bracketed_warning) {
+               if (-e $bash_www_cnf) {
+                   my $filesize = (stat($bash_www_cnf))[7];
+                   if ($filesize > 0) {
+                       $non_empty_conffile = 1;
+                   }
+               }
+           }
+           if (($bracketed_warning) || ($non_empty_conffile)) {
+               my $bash_update = &set_bracketed_paste_off();
+               if ($bash_update) {
+                   &log($fh,'<p>'.$bash_update.'</p>'."\n");
+               }
+           } else {
+               &log($fh,'<p>No action needed; /home/www/.inputrc already set.</p>'."\n");
+           }
+        } else {
+            &log($fh,'<hr /><a name="bashconf" /><h2>bash readline config</h2><h3>Bracketed Paste</h3>'.
+                     '<p>No action needed for distros using pre-8.1 bash readline library</p>'."\n");
+        }
         my $domconf = &get_domain_config();
         my ($threshold,$sysmail,$reportstatus,$weightsref,$exclusionsref) =
             &get_permcount_settings($domconf);