--- doc/loncapafiles/updatequery.piml	2005/05/21 00:40:01	1.37
+++ doc/loncapafiles/updatequery.piml	2020/01/07 01:29:06	1.84.2.3
@@ -1,6 +1,6 @@
 <!-- updatequery.piml -->
 
-<!-- $Id: updatequery.piml,v 1.37 2005/05/21 00:40:01 www Exp $ -->
+<!-- $Id: updatequery.piml,v 1.84.2.3 2020/01/07 01:29:06 raeburn Exp $ -->
 
 <!--
 
@@ -33,6 +33,8 @@ http://www.lon-capa.org/
 <target dist='default'>/</target>
 <perlscript mode='fg'>
 $|=1;
+use strict;
+
   print(&lt;&lt;END);
 
 
@@ -47,33 +49,34 @@ $|=1;
 *********************************************
 
 END
-sleep(3);
+#sleep(3);
 </perlscript>
 </file>
 <file>
 <target dist='default'>loncom/hosts.tab</target>
 <perlscript mode='fg'>
+my $lonCluster;
 unless (-l "<TARGET />") {
   print(&lt;&lt;END);
 
 ===============================================================================
 Which cluster option would you like to have installed?
 IMPORTANT: to take advantage of the cluster options 1) and 3),
-you must contact lon-capa\@lon-capa.org.
+you must contact loncapa\@loncapa.org.
 
 1) PRODUCTION - you want to eventually connect this machine to the
                 LON-CAPA content sharing network. This setting is for
                 schools, colleges, and universities, that currently
-                are running - or in the future will run - courses
+                are running - or in the future will run - courses.
 2) STAND-ALONE - you want this machine to run in 'stand-alone' mode and
-                 not be connected to other LON-CAPA machines for now
+                 not be connected to other LON-CAPA machines for now.
 3) DEVELOPMENT - you want to do software (not content!) development with
                  this workstation and eventually link it with the
                  workstations of other LON-CAPA software developers.
-4) PRESERVE the existing hosts.tab and domain.tab
-                (/home/httpd/lonTabs/hosts.tab and
-                 /home/httpd/lonTabs/domain.tab)
-
+4) RUNNING YOUR OWN CLUSTER - this machine is not in the standard LON-CAPA
+                 clusters and won't be in the future and you want the existing
+                 hosts.tab and domain.tab files to be left alone.
+                 (This choice is unlikely what you want to select.)
 END
 # Option number 26 will install rawhide_hosts.tab, but
 # the typical user does not want to be part of an intensive
@@ -81,7 +84,7 @@ END
 
 # get input
 # if valid then process, otherwise loop
-$flag=0;
+my $flag=0;
 while (!$flag) {
   print "ENTER 1, 2, 3, or 4:\n";
   my $choice=&lt;&gt;;
@@ -97,23 +100,17 @@ while (!$flag) {
   }
   elsif ($choice==4) {
     $lonCluster='existing'; $flag=1;
-    if (-e '/home/httpd/lonTabs/hosts.tab') {
-      `cp /home/httpd/lonTabs/hosts.tab ../existing_hosts.tab`;
-    }
-    else {
-      print &lt;&lt;END;
-There is no existing /home/httpd/lonTabs/hosts.tab
+    foreach my $file ('hosts.tab','dns_hosts.tab',
+                      'domain.tab','dns_domain.tab') {
+        if (-e '/home/httpd/lonTabs/'.$file) {
+	    `cp /home/httpd/lonTabs/$file ../existing_$file`;
+        }
+        else {
+	    print &lt;&lt;END;
+There is no existing /home/httpd/lonTabs/$file
 END
-      die('');
-    }
-    if (-e '/home/httpd/lonTabs/domain.tab') {
-      `cp /home/httpd/lonTabs/domain.tab ../existing_domain.tab`;
-    }
-    else {
-      print &lt;&lt;END;
-There is no existing /home/httpd/lonTabs/domain.tab
-END
-      die('');
+            die('');
+        }
     }
   }
   elsif ($choice==26) {
@@ -129,19 +126,28 @@ END
 $|=1;
 my $domainDescription;
 my $domainTabExtras;
+my $primaryLibServer;
+my $protocol;
+my $intdom;
+my $desiredhostname;
+my @libservers = ();
 unless (-e "<TARGET />") {
   print(&lt;&lt;END);
            WELCOME TO LON-CAPA!
 
-If you have questions, please visit http://install.lon-capa.org
-or contact helpdesk\@lon-capa.org.
+If you have questions, please visit http://install.loncapa.org
+or contact helpdesk\@loncapa.org.
 
 ===============================================================================
-The following 4 values are needed to configure LON-CAPA:
+The following 8 values are needed to configure LON-CAPA:
 * Machine Role
 * LON-CAPA Domain Name
-* LON-CAPA Machine ID Name, and
-* System Administration E-mail Address.
+* LON-CAPA Machine ID Name
+* Server Administration E-mail Address
+* LON-CAPA Domain's Primary Library Server Machine ID
+* Web Server Protocol
+* Internet Domain Name of Your Institution
+* Hostname
 ===============================================================================
 
 In addition, a Support E-mail Address can also be included. If
@@ -159,8 +165,8 @@ close(OUT);
 **** Machine Role ****
 Library server (recommended if first-time installation of LON-CAPA):
    Servers that are repositories of authoritative educational resources.
-   These servers also provide the construction space by which instructors
-   assemble their classroom online material.
+   These servers also provide the authoring spaces in which content
+   creators (e.g., faculty instructors) create their learning content.
 Access server:
    Servers that load-balance high-traffic delivery of educational resources
    over the world-wide web.
@@ -205,18 +211,26 @@ if ($hostname=~/([^\.]*)\.([^\.]*)$/) {
   print(&lt;&lt;END);
 
 **** Domain ****
-[this does NOT need to correspond to internet address domains,
- good examples might be "msu" or "bionet" or "vermontcc",
- bad examples are "physics" (too general)
+[This does NOT need to correspond to an internet address domain.
+ Please make this name short AND descriptive of your organization.
+ Domain names are close to impossible to change later!!!
+ Good examples might be "msu" or "bionet" or "vermontcc".
+ Bad examples are "physics" (too general)
    or "michiganstateuniversity" (too long)
-   or "msuedu" (internet domain, just make it "msu")
-   or "msuphysics" (only if there is a good reason to limit)
+   or "msuedu" (just make it "msu", or else make it msu.edu)
+   or "msuphysics" (only if there is a good reason to limit to department
+                    - we don't know of one)
    or "mydomain" (what is that?)
- Please make this name short AND descriptive of your organization.
- Note that the domain is very hard to change later.
- Double-check with the LON-CAPA group at MSU if this domain is 
- going to be part of the main production cluster, since it needs
- to be unique.]
+ Avoid multiple domains at the same institution, even if it means that you 
+ have to actually work together with your colleagues. You can still run
+ multiple library servers within the same domain.
+ If this domain is eventually going to be part of the main production
+ cluster, you MUST contact the LON-CAPA group at MSU (loncapa\@loncapa.org)
+ to have a domain name assigned, and then use it exactly as given. This is
+ also true for test installs that might eventually turn into production setups.
+ The short domain name needs to be unique, if your aim is to join a cluster 
+ containing existing domains. Stop now if you have not yet contacted the 
+ MSU LON-CAPA group.] 
 END
 
 # get domain name
@@ -237,7 +251,8 @@ END
   my $choice=&lt;&gt;;
   chomp($choice);
   my $bad_domain_flag=0;
-  my @bad_domain_names=('raw','userfiles','priv','adm','uploaded');
+  my @bad_domain_names=('res','raw','userfiles','priv','adm','uploaded',
+	'editupload');
   foreach my $bad (@bad_domain_names) {
     $bad_domain_flag=1 if $choice eq $bad;
   }
@@ -251,26 +266,25 @@ END
     close(OUT);
     $lonDefDomain=$choice;
     $flag=1;
-  } elsif (length($choice)>12) {
+  } elsif (length($choice)>35) {
     print "Name too long\n";
   } elsif (length($choice)<2) {
     print "Name too short\n";
-  } elsif ($choice!~/\_/ and $choice=~/^\w+$/) {
+  } elsif ($bad_domain_flag) {
+    print "Invalid input ('$choice' conflicts with LON-CAPA namespace).\n";
+    print "Please try something different than '$choice'\n";
+  } elsif ($choice!~/\_/ and $choice=~/^[\w\-.]+$/) {
     open(OUT,'&gt;&gt;/tmp/loncapa_updatequery.out');
     print(OUT 'lonDefDomain'."\t".$choice."\n");
     close(OUT);
     $lonDefDomain=$choice;
     $r='l';
     $flag=1;
-  } elsif ($bad_domain_flag) {
-    print "Invalid input ('$choice' conflicts with LON-CAPA namespace).\n";
-    print "Please try something different than '$choice'\n";
   } else {
-    print "Invalid input (only alphanumeric characters supported).\n";
+    print "Invalid input (only alphanumeric characters, '-', and '.' supported).\n";
   }
 }
 
-
 # get domain description
 # accept if valid, if not valid, tell user and repeat
 $flag=0;
@@ -307,11 +321,11 @@ if ($lonDefDomain) {
   print(&lt;&lt;END);
 
 **** Machine ID Name ****
-[this does NOT need to correspond to internet address names;
+[This does NOT need to correspond to internet address names;
  this name MUST be unique to the whole LON-CAPA network;
- we recommend that you use a name based off of your institution;
- good examples: "msul1" or "bioneta2";
- bad examples: "loncapabox" or "studentsinside".
+ we recommend that you use a name based off of your institution.
+ Good examples: "msul1" or "bioneta2".
+ Bad examples: "loncapabox" or "studentsinside".
  Note that machine names are very hard to change later.]
 END
 # get machine name
@@ -339,21 +353,80 @@ END
     close(OUT);
     $lonHostID=$choice;
     $flag=1;
-  } elsif (length($choice)>15) {
+  } elsif (length($choice)>45) {
     print "Name too long\n";
   } elsif (length($choice)<4) {
     print "Name too short\n";
-  } elsif ($choice!~/\_/ and $choice=~/^\w+$/) {
+  } elsif ($choice!~/\_/ and $choice=~/^[\w\-.]+$/) {
     open(OUT,'&gt;&gt;/tmp/loncapa_updatequery.out');
     print(OUT 'lonHostID'."\t".$choice."\n");
     close(OUT);
     $lonHostID=$choice;
     $flag=1;
   } else {
-    print "Invalid input (only alphanumeric characters supported).\n";
+    print "Invalid input (only alphanumeric characters, '-', and '.' supported).\n";
   }
 }
 
+# get primary library server in domain
+if ($lonRole eq 'library') {
+    if (!grep/^\Q$lonHostID\E$/,@libservers) {
+        push(@libservers,$lonHostID);
+    } 
+    if (@libservers == 1) {
+        $primaryLibServer = $libservers[0];
+    }
+}
+
+$flag=0;
+while (!$flag) {
+  print(&lt;&lt;END);
+**** Domain's Primary Library Server ID ****
+This should be the LON-CAPA machine ID of a library server in your 
+domain.  If you only have a single library server in your domain, then
+the Primary Library server ID will be the machine ID of that server. 
+This server will be where domain data which are not associated with any
+specific home library server will be stored (e.g., configurations that
+apply to all nodes in the domain).
+END
+    if (defined($primaryLibServer)) {
+        print(&lt;&lt;END);
+ENTER DOMAIN'S PRIMARY LIBRARY SERVER ID [$primaryLibServer]:
+END
+    } elsif (@libservers > 0) {
+        print(&lt;&lt;END);
+ENTER DOMAIN'S PRIMARY LIBRARY SERVER ID [$libservers[0]]
+END
+    } else {
+        print (&lt;&lt;END);
+No library servers could be identified for this domain.  If you have already installed LON-CAPA on a different server (designated as a library server) in this domain, please enter the LONCAPA MACHINE ID of that server.  If not, you will need to install a LON-CAPA library server.  Enter the MACHINE ID of the server you plan to designate as a library server.
+END
+    }
+
+    my $choice=&lt;&gt;;
+    chomp($choice);
+    if ($primaryLibServer and $choice=~/^\s*$/) {
+        $choice=$primaryLibServer;
+        open(OUT,'&gt;&gt;/tmp/loncapa_updatequery.out');
+        print(OUT 'primaryLibServer'."\t".$choice."\n");
+        close(OUT);
+        $flag=1;
+    } elsif (length($choice)>35) {
+        print "Name too long\n";
+    } elsif (length($choice)<4) {
+        print "Name too short\n";
+    } elsif ($choice!~/\_/ and $choice=~/^[\w\-.]+$/) {
+        open(OUT,'&gt;&gt;/tmp/loncapa_updatequery.out');
+        print(OUT 'primaryLibServer'."\t".$choice."\n");
+        close(OUT);
+        $primaryLibServer=$choice;
+        $flag=1;
+    } else {
+        print "Invalid input (only alphanumeric characters, '-', and '.' supported).\n";
+    }
+}
+
+
 # get admin e-mail address
 # accept if valid, if not valid, tell user and repeat
 $flag=0;
@@ -361,7 +434,7 @@ my $lonAdmEMail;
 while (!$flag) {
   print(&lt;&lt;END);
 
-**** System Administrator's E-mail ****
+**** Server Administrators E-mail ****
 E-mail address of the person who will manage this machine
 [should be in the form somebody\@somewhere]
 ENTER ADMIN E-MAIL ADDRESS:
@@ -414,10 +487,122 @@ END
   }
 }
 
+# get protocol
+# accept if valid, if not valid, tell user and repeat
+$flag=0;
+while (!$flag) {
+  print(&lt;&lt;END);
+
+****  Web Server Protocol ****
+If you plan to run the Apache server with SSL enabled, 
+the protocol should be: https; otherwise it should be http.
+ENTER WEB SERVER PROTOCOL [http]:
+END
+
+  my $choice=&lt;&gt;;
+  chomp($choice);
+  if ($choice =~ /^https?$/) {
+    open(OUT,'&gt;&gt;/tmp/loncapa_updatequery.out');
+    print(OUT 'protocol'."\t".$choice."\n");
+    close(OUT);
+    $protocol=$choice;
+    $flag=1;
+  } elsif ($choice eq '') {
+    open(OUT,'&gt;&gt;/tmp/loncapa_updatequery.out');
+    print(OUT 'protocol'."\t".'http'."\n");
+    close(OUT);
+    $protocol = 'http';
+    $flag = 1;
+  } else {
+    print "Invalid input (only http or https allowed).\n";
+  }
+}
+
+# get internet domain
+# accept if valid, if not valid, tell user and repeat
+$flag=0;
+while (!$flag) {
+  print(&lt;&lt;END);
+
+****  Internet Domain Name of Your Institution ****
+
+The internet domain name used for servers at your institution 
+should be provided.  This will be similar to: ustate.edu or
+topcollege.ac.uk or myhostingcompany.com, i.e., the part of
+a server hostname which indicates to which organization the 
+server belongs.
+
+ENTER INTERNET DOMAIN NAME:
+END
+
+  my $choice=&lt;&gt;;
+  chomp($choice);
+  if ($choice =~/[^.]+\.[^.]+/) {
+    open(OUT,'&gt;&gt;/tmp/loncapa_updatequery.out');
+    print(OUT 'internet domain'."\t".$choice."\n");
+    close(OUT);
+    $intdom=$choice;
+    $flag=1;
+  }
+  else {
+    print "Invalid input (must be at least two levels separated by .  - e.g., ustate.edu).\n";
+  }
+}
+
+# get hostname
+# accept if valid, if not valid, tell user and repeat
+$flag=0;
+my $posshostname;
+if (($hostname =~ /^[A-Za-z0-9\-]+$/) && ($intdom ne '')) {
+    $posshostname = $hostname.'.'.$intdom;
+} 
+if (($hostname =~ /^[A-Za-z0-9\-]+\.[A-Za-z0-9\-]+/) &&
+    ($hostname =~ /^[A-Za-z0-9.\-]+$/)) {
+    $posshostname = $hostname;
+}
+while (!$flag) {
+  print(&lt;&lt;END);
+
+****** Hostname of the server/VM *****
+
+The hostname of the server/VM is required. This will be similar to:
+somename.ustate.edu or somename.department.ustate.edu, and would be 
+the web address which users would point their web browsers at to
+access the server.
+
+END
+
+if ($posshostname) {
+    print "ENTER HOSTNAME OF SERVER [$posshostname]:\n";
+} else {
+    print "ENTER HOSTNAME OF SERVER:\n";
+}
+
+  my $choice=&lt;&gt;;
+  chomp($choice);
+  if (($choice =~ /^[A-Za-z0-9\-]+\.[A-Za-z0-9\-]+/) &&
+      ($choice =~ /^[A-Za-z0-9.\-]+$/)) {
+    open(OUT,'&gt;&gt;/tmp/loncapa_updatequery.out');
+    print(OUT 'hostname'."\t".$choice."\n");
+    close(OUT);
+    $desiredhostname=$choice;
+    $flag=1;
+  } elsif (($choice eq '') && ($posshostname ne '')) {
+    open(OUT,'&gt;&gt;/tmp/loncapa_updatequery.out');
+    print(OUT 'hostname'."\t$posshostname\n");
+    close(OUT);
+    $desiredhostname = $posshostname;
+    $flag = 1;
+  } else {
+    print "Invalid input (only letters, numbers, - and . allowed, with at least one .).\n";
+  }
+}
 
 # update loncapa.conf
-my $confdir='/etc/httpd/conf/';
-#my $confdir='';
+my $confdir = '/etc/httpd/conf/';
+if ('<DIST />' eq 'sles10' || '<DIST />' eq 'sles11' || '<DIST />' eq 'sles12' || '<DIST />' eq 'sles15' || '<DIST />' eq 'suse10.1' || '<DIST />' eq 'suse10.2' || '<DIST />' eq 'suse10.3' || '<DIST />' eq 'suse11.1' || '<DIST />' eq 'suse11.2' || '<DIST />' eq 'suse11.3' || '<DIST />' eq 'suse11.4' || '<DIST />' eq 'suse12.1' || '<DIST />' eq 'suse12.2' || '<DIST />' eq 'suse12.3' || '<DIST />' eq 'suse13.1' || '<DIST />' eq 'suse13.2' || '<DIST />' eq 'debian5' || '<DIST />' eq 'debian6' || '<DIST />' eq 'ubuntu6' || '<DIST />' eq 'ubuntu8' || '<DIST />' eq 'ubuntu10' || '<DIST />' eq 'ubuntu12' || '<DIST />' eq 'ubuntu14' || '<DIST />' eq 'ubuntu16' || '<DIST />' eq 'ubuntu18' || '<DIST />' eq 'ubuntu20') {
+     $confdir = '/etc/apache2/';
+}   
 my $filename='loncapa.conf';
 my %perlvar;
     if (-e "$confdir$filename") {
@@ -448,7 +633,7 @@ my %perlvar;
     unless ($perlvar{'lonReceipt'} and $perlvar{'lonReceipt'}!~/\{\[\[\[\[/) {
        my $lonReceipt='';
        srand(time ^ $$ ^ unpack "%L*", `ps axww | gzip`);
-       my @alnum=(0..9,a..z);
+       my @alnum=(0..9,"a".."z");
        foreach my $i (1..20) {
 	 $lonReceipt.=$alnum[int(rand(36))];
        }
@@ -458,8 +643,12 @@ my %perlvar;
       die("Cannot output to $confdir$filename\n");
     foreach my $key (keys %perlvar) {
       my $value=$perlvar{$key};
+      my $line = "PerlSetVar     $key      $value"; 
+      if ($value eq '') {
+          $line = '#'.$line;
+      }
       print(OUT &lt;&lt;END);
-PerlSetVar     $key      $value
+$line
 END
     }
     close(OUT);
@@ -467,7 +656,8 @@ END
 </perlscript>
 </file>
 <file>
-<target dist='default'>/</target>
+<target dist='default'>/etc/httpd/conf/</target>
+<target dist='sles10 sles11 sles12 sles15 suse10.1 suse10.2 suse10.3 suse11.1 suse11.2 suse11.3 suse11.4 suse12.1 suse12.2 suse12.3 suse13.1 suse13.2 debian5 debian6 ubuntu6 ubuntu8 ubuntu10 ubuntu12 ubuntu14 ubuntu16 ubuntu18 ubuntu20'>/etc/apache2/</target>
 <perlscript mode='fg'>
 sub securesetting {
     my (%perlvar)=@_;
@@ -485,7 +675,7 @@ sub securesetting {
     return ($securestatus,$securenum);
 }
 # read values from loncapa.conf
-my $confdir='/etc/httpd/conf/';
+my $confdir = "<TARGET />";
 my $filename='loncapa.conf';
 my %perlvar;
 my ($securestatus,$securenum);
@@ -520,7 +710,7 @@ my ($securestatus,$securenum);
     unless ($perlvar{'lonReceipt'} and $perlvar{'lonReceipt'}!~/\{\[\[\[\[/) {
        my $lonReceipt='';
        srand(time ^ $$ ^ unpack "%L*", `ps axww | gzip`);
-       my @alnum=(0..9,a..z);
+       my @alnum=(0..9,"a".."z");
        foreach my $i (1..20) {
 	 $lonReceipt.=$alnum[int(rand(36))];
        }
@@ -539,35 +729,102 @@ my %perlvarstatic;
 	}
 	close(CONFIG);
     }
-    if (!$domainDescription && $lonCluster ne 'existing') {
-       open(IN,'&lt;../'.$lonCluster.'_domain.tab');
-       while(&lt;IN&gt;) {
-          if (/^$perlvar{'lonDefDomain'}\:/) {
-	     (undef,$domainDescription,$domainTabExtras)=split(/:/,$_,3);
-	     chomp($domainDescription);
-	     chomp($domainTabExtras);
-             last;
-          }
-       }
-       close(IN);
-    }
+
+    my (@hosts_files, @domain_files);
+    if ( $lonCluster ne 'existing') {
+	push(@domain_files,'../'.$lonCluster.'_domain.tab',
+	     '../'.$lonCluster.'_dns_domain.tab');
+	push(@hosts_files,'../'.$lonCluster.'_hosts.tab',
+	     '../'.$lonCluster.'_dns_hosts.tab');
+    }
+    push(@domain_files,'/home/httpd/lonTabs/domain.tab',
+         '/home/httpd/lonTabs/dns_domain.tab');
+    push(@hosts_files,'/home/httpd/lonTabs/hosts.tab',
+         '/home/httpd/lonTabs/dns_hosts.tab');
+
     if (!$domainDescription) {
-       open(IN,'&lt;/home/httpd/lonTabs/domain.tab');
-       while(&lt;IN&gt;) {
-          if (/^$perlvar{'lonDefDomain'}\:/) {
-	     (undef,$domainDescription,$domainTabExtras)=split(/:/,$_,3);
-	     chomp($domainDescription);
-	     chomp($domainTabExtras);
-             last;
-          }
-       }
-       close(IN);
+	foreach my $file (@domain_files) {
+	    open(IN,'&lt;'.$file);
+	    while(my $line = &lt;IN&gt;) {
+		if ($line =~ /^\Q$perlvar{'lonDefDomain'}\E\:/) {
+		    (undef,$domainDescription,$domainTabExtras)=split(/:/,$line,3);
+		    chomp($domainDescription);
+		    chomp($domainTabExtras);
+		    # the remaining field (primary lib server) is handled later
+		    $domainTabExtras = join(':',(split(/:/,$domainTabExtras))[0..5]);
+		    last;
+		}
+	    }
+	    close(IN);
+	    last if ($domainDescription);
+	}
+    }
+
+    if ((!$protocol) || (!$desiredhostname)) {
+        foreach my $file (@hosts_files) {
+            open(IN,'&lt;'.$file);
+            while(my $line = &lt;IN&gt;) {
+                if ($line =~ /^\Q$perlvar{'lonHostID'}\E:\Q$perlvar{'lonDefDomain'}\E\:(?:access|library)\:([^:]+)\:(https?)/) {
+                    if (!$desiredhostname) {
+                        $desiredhostname = $1;
+                    }
+                    if (!$protocol) { 
+                        $protocol = $2;
+                        chomp($protocol);
+                    }
+                    last;
+                }
+            }
+        }
+    }
+
+    if (!$protocol) {
+        $protocol = 'http';
+    }
+
+    if (!$intdom) {
+        foreach my $file (@hosts_files) {
+            open(IN,'&lt;'.$file);
+            while(my $line = &lt;IN&gt;) {
+                if ($line =~ /^\Q$perlvar{'lonHostID'}\E:\Q$perlvar{'lonDefDomain'}\E\:(?:access|library)\:[^:]+\:https?\:([^:]+)/) {
+                    $intdom = $1;
+                    chomp($intdom);
+                    last;
+                }
+            }
+        }
+    }
+
+    while(!$primaryLibServer && (@hosts_files || @domain_files)) {
+	my $file = shift(@domain_files);
+        open(IN,'&lt;'.$file);
+        while(my $line = &lt;IN&gt;) {
+            if ($line =~ /^\Q$perlvar{'lonDefDomain'}\E\:/) {
+		$primaryLibServer=(split(/:/,$line))[8];
+                chomp($primaryLibServer);
+            }
+        }
+        close(IN);
+	last if ($primaryLibServer);
+	$file = shift(@hosts_files);
+	open(IN,'&lt;'.$file);
+	while(my $line = &lt;IN&gt;) {
+	    if ($line =~ /^([^\:]+)\:\Q$perlvar{'lonDefDomain'}\E\:library\:/) {
+		push(@libservers,$1);
+	    }
+	}
+	# make list unique
+	@libservers = keys(%{{ map { $_ => 1 } (@libservers) }});
+	close(IN);
+	if (@libservers == 1) {
+	    $primaryLibServer = $libservers[0];
+	}
     }
    
 # implement editing logic below, interactively
-# update loncapa.conf until 8 is entered
+# update loncapa.conf until 15 is entered
 
-$flag=0;
+my $flag=0;
 
 while (!$flag) {
   print(&lt;&lt;END);
@@ -577,41 +834,84 @@ This is now the current configuration of
  1) Domain Name: $perlvar{'lonDefDomain'}
  2) Domain Description: $domainDescription
  3) Machine Name: $perlvar{'lonHostID'}
- 4) System Administrator's E-mail Address: $perlvar{'lonAdmEMail'}
- 5) Support E-mail Address: $perlvar{'lonSupportEMail'}
- 6) Role: $perlvar{'lonRole'}
- 7) Cache Expiration Time: $perlvar{'lonExpire'}
- 8) Server Load: $perlvar{'lonLoadLim'}
- 9) User Load: $perlvar{'lonUserLoadLim'}
-10) Allow only secure connections: $securestatus 
-11) Everything is correct up above
-END
-my $hbug=-1;
-my $dbug=-1;
-{
-  my $v=$perlvar{'lonHostID'};
-  $hbug=0;
-  $hbug=1 if $v=~/\W/;
-  $hbug=1 if $v=~/\_/;
-}
-{
-  my $v=$1;
-  $dbug=0;
-  $dbug=1 if $v=~/\W/;
-  $dbug=1 if $v=~/\_/;
-}
-
-if ($hbug) {
-  print "**** ERROR **** ".
-	"Invalid lonHostID (should only be letters and/or digits)\n";
-}
-if ($dbug) {
-  print "**** ERROR **** ".
-	"Invalid lonDefDomain (should only be letters and/or digits)\n";
+ 4) ID of primary library server for domain: $primaryLibServer
+ 5) Server Administrator's E-mail Address: $perlvar{'lonAdmEMail'}
+ 6) Support E-mail Address: $perlvar{'lonSupportEMail'}
+ 7) Web Server Protocol (http or https): $protocol 
+ 8) Internet Domain Name: $intdom 
+ 9) Hostname: $desiredhostname
+10) Role: $perlvar{'lonRole'}
+11) Cache Expiration Time: $perlvar{'lonExpire'}
+12) Server Load: $perlvar{'lonLoadLim'}
+13) User Load: $perlvar{'lonUserLoadLim'}
+14) Allow only secure connections: $securestatus 
+15) Everything is correct up above
+END
+
+my @error;
+foreach my $v ($perlvar{'lonDefDomain'},$perlvar{'lonHostID'}) {
+   if (length($v)>35) { push(@error,"Name $v too long"); }		
+   if (length($v)<2) { push(@error,"Name $v too short"); }
+   if ($v=~/capa/i) {
+	if ($v!~/^oucapa\d+$/ && 
+	    ($v!~/^capa\d+$/ && $perlvar{'lonDefDomain'} eq 'uwsp')) {
+		 push(@error,"Name $v contains 'capa'");
+	}
+   }
+   foreach my $bad ('res','raw','userfiles','priv','adm','uploaded',
+	'editupload') {
+      push(@error,"\nName $v reserved.") if $v eq $bad;
+   }
+   if ($v=~/[^\w\-.]/) { push(@error,"Name $v contains special characters"); }
+}
+if ($domainDescription =~ /^\s*$/) {
+   push(@error,"Domain Description is blank.");
+} elsif ($domainDescription!~/^[\(\)\-\w\s,]+$/) {
+   push(@error,"Domain Description contains special characters.");
+} 
+foreach my $v ($perlvar{'lonExpire'},$perlvar{'lonLoadLim'}) {
+   unless ($v=~/^[\d+\.]+$/) { push(@error,"Number expected instead of $v"); }
+}
+unless (($perlvar{'lonRole'} eq 'library') || ($perlvar{'lonRole'} eq 'access')) {
+   push(@error,"Invalid Role");
+}
+
+unless (($protocol eq 'http') || ($protocol eq 'https')) {
+   push(@error,"Invalid Protocol (must be http or https");
+}
+
+if (!defined($intdom)) { 
+   push(@error,"No internet domain name designated. Enter something like ustate.edu"); 
+} elsif ($intdom !~ /[^.]+\.\w{2,6}$/) {
+   push(@error,"Invalid Internet domain name (must be at least two levels separated by .  - e.g., ustate.edu");
+}
+
+if (!defined($primaryLibServer)) {
+   if (@libservers > 0) {
+       push(@error,"No primary library server ID designated. Choose from: ".join(',',sort(@libservers)));
+   } else {
+       push(@error,"No library servers in this domain (including current server)");
+   }
+} else {
+   if (length($primaryLibServer)>35) { push(@error,"Primary Library Server ID:  $primaryLibServer too long"); }
+   if (length($primaryLibServer)<2) { push(@error,"Primary Library Server ID:  $primaryLibServer too short"); }
+   if ($primaryLibServer =~/capa/i) {
+        if ($primaryLibServer!~/^oucapa\d+$/ &&
+            ($primaryLibServer!~/^capa\d+$/ && $perlvar{'lonDefDomain'} eq 'uwsp')) {
+                 push(@error,"Primary library server ID $primaryLibServer contains 'capa'")
+        }
+   }
+   foreach my $bad ('res','raw','userfiles','priv','adm','uploaded',
+        'editupload') {
+      push(@error,"Primary library server ID $primaryLibServer reserved.") if $primaryLibServer eq $bad;
+   }
+   if ($primaryLibServer=~/[^\w\-.]/) { push(@error,"Primary library server ID $primaryLibServer contains special characters"); }
 }
 
+
+if (@error) { print "\n*** ERRORS: \n\t".join("\n\t",@error)."\n"; }
   print(&lt;&lt;END);
-ENTER A CHOICE OF 1-10 TO CHANGE, otherwise ENTER 11:
+ENTER A CHOICE OF 1-14 TO CHANGE, otherwise ENTER 15:
 END
 my $choice=&lt;&gt;;
 chomp($choice);
@@ -651,25 +951,70 @@ END
   }
   elsif ($choice==4) {
   print(&lt;&lt;END);
-4) System Administrator's E-mail Address: $perlvar{'lonAdmEMail'}
+4) ID of primary library server for domain: $primaryLibServer
+ENTER NEW VALUE (this will be the LON-CAPA Machine ID of a library server in
+                 your domain; it cannot contain any of '_' '-' '.' or ':'. 
+                 This server will be where domain data which are not 
+                 associated with any specific home library server
+                 will be stored (e.g., e-mail broadcast by Domain Coordinators
+                 to users in the domain).
+END
+    my $choice2=&lt;&gt;;
+    chomp($choice2);
+    $primaryLibServer=$choice2;
+  }
+  elsif ($choice==5) {
+  print(&lt;&lt;END);
+5) Server Administrator's E-mail Address: $perlvar{'lonAdmEMail'}
 ENTER NEW VALUE:
 END
     my $choice2=&lt;&gt;;
     chomp($choice2);
     $perlvar{'lonAdmEMail'}=$choice2;
   }
-  elsif ($choice==5) {
+  elsif ($choice==6) {
   print(&lt;&lt;END);
-5) Support E-mail Address: $perlvar{'lonSupportEMail'}
+6) Support E-mail Address: $perlvar{'lonSupportEMail'}
 ENTER NEW VALUE:
 END
     my $choice2=&lt;&gt;;
     chomp($choice2);
     $perlvar{'lonSupportEMail'}=$choice2;
   }
-  elsif ($choice==6) {
+  elsif ($choice==7) {
+  print(&lt;&lt;END);
+7) Server Protocol (http or https): 
+ENTER NEW VALUE: (this should be either 'http' or 'https'
+                 if in doubt set to 'http'):
+END
+    my $choice2=&lt;&gt;;
+    chomp($choice2);
+    $protocol=$choice2;
+  }
+  elsif ($choice==8) {
   print(&lt;&lt;END);
-6) Role: $perlvar{'lonRole'}
+8) Internet Domain Name of Institution
+ENTER NEW VALUE: 
+
+END
+    my $choice2=&lt;&gt;;
+    chomp($choice2);
+    $intdom=$choice2;
+  }
+  elsif ($choice==9) {
+  print(&lt;&lt;END);
+9) Hostname of Server/VM
+ENTER NEW VALUE:
+
+END
+    my $choice2=&lt;&gt;;
+    chomp($choice2);
+    $desiredhostname=$choice2;
+  }
+
+  elsif ($choice==10) {
+  print(&lt;&lt;END);
+10) Role: $perlvar{'lonRole'}
 ENTER NEW VALUE (this should be either 'access' or 'library' 
                  if in doubt select 'library'):
 END
@@ -677,27 +1022,27 @@ END
     chomp($choice2);
     $perlvar{'lonRole'}=$choice2;
   }
-  elsif ($choice==7) {
+  elsif ($choice==11) {
   print(&lt;&lt;END);
-7) Cache Expiration Time: $perlvar{'lonExpire'}
+11) Cache Expiration Time: $perlvar{'lonExpire'}
 ENTER NEW VALUE (in seconds, 86400 is a reasonable value):
 END
     my $choice2=&lt;&gt;;
     chomp($choice2);
     $perlvar{'lonExpire'}=$choice2;
   }
-  elsif ($choice==8) {
+  elsif ($choice==12) {
   print(&lt;&lt;END);
-8) Server Load: $perlvar{'lonLoadLim'}
+12) Server Load: $perlvar{'lonLoadLim'}
 ENTER NEW VALUE:
 END
     my $choice2=&lt;&gt;;
     chomp($choice2);
     $perlvar{'lonLoadLim'}=$choice2;
   }
-  elsif ($choice==9) {
+  elsif ($choice==13) {
   print(&lt;&lt;END);
-9) User Load: $perlvar{'lonUserLoadLim'}
+13) User Load: $perlvar{'lonUserLoadLim'}
 Numer of users that can login before machine is 'overloaded'
 ENTER NEW VALUE (integer value, 0 means there is no limit):
 END
@@ -705,9 +1050,9 @@ END
     chomp($choice2);
     $perlvar{'lonUserLoadLim'}=$choice2;
   }
-  elsif ($choice==10) {
+  elsif ($choice==14) {
   print(&lt;&lt;END);
-10) Allow only secure connections: $securestatus 
+14) Allow only secure connections: $securestatus 
 The Lon-CAPA communication daemons lonc and lond can be configured to
 allow only secure connections by default.
 
@@ -719,7 +1064,7 @@ POSSIBLE CHOICES:
 3) allow insecure connections to this machine but only allow connections
     to machines that support secure connections
 4) allow insecure connections
-ENTER NEW VALUE (currenly $securenum):
+ENTER NEW VALUE (currently $securenum):
 END
     my $choice2=&lt;&gt;;
     chomp($choice2);
@@ -734,19 +1079,24 @@ END
     }
     ($securestatus,$securenum)=&securesetting(%perlvar);
   }
-  elsif ($choice==11) {
+  elsif (($choice==15) && (!@error)) {
     $flag=1;
   }
   else {
-
+    print "Invalid input.\n";
   }
 }
+
     open(OUT,"&gt;$confdir$filename") or
       die("Cannot output to $confdir$filename\n");
     foreach my $key (keys %perlvar) {
       my $value=$perlvar{$key};
+      my $line = "PerlSetVar     $key      $value";
+      if ($value eq '') {
+          $line = '#'.$line;
+      }
       print(OUT &lt;&lt;END) unless $perlvarstatic{$key};
-PerlSetVar     $key      $value
+$line
 END
     }
     close(OUT);
@@ -756,34 +1106,51 @@ END
 <target dist='default'>loncom/hosts.tab</target>
 <perlscript mode='fg'>
 unless (-l "<TARGET />") {
-  my $hostname=`hostname -f`;chomp($hostname);
-  $date=`date -I`; chomp($date);
-  $lonHostID=$perlvar{'lonHostID'};
-  $lonHostID=~s/\W//g;
-  $lineexistflag=0;
-  $hostidexistflag=0;
-  $line2insert=&lt;&lt;END;
-$perlvar{'lonHostID'}:$perlvar{'lonDefDomain'}:$perlvar{'lonRole'}:$hostname
+  if ($desiredhostname eq '') { 
+      my $hostname=`hostname -f`;chomp($hostname);
+      $desiredhostname = $hostname;
+  }
+  my $date=`date -I`; chomp($date);
+  my $lonHostID=$perlvar{'lonHostID'};
+  $lonHostID=~s/[^\w\-.]//g;
+  my $lineexistflag=0;
+  my $hostidexistflag=0;
+  my $line2insert=&lt;&lt;END;
+$perlvar{'lonHostID'}:$perlvar{'lonDefDomain'}:$perlvar{'lonRole'}:$desiredhostname:$protocol:$intdom
 END
-  $domaininsert="$perlvar{'lonDefDomain'}:$domainDescription:$domainTabExtras\n";
+  if (!$domainTabExtras) {
+	$domainTabExtras=':::::';
+  }
+  my $domaininsert="$perlvar{'lonDefDomain'}:$domainDescription:$domainTabExtras:$primaryLibServer\n";
   if ($lonCluster eq 'standalone') {
     open(OUT,'&gt;../'.$lonCluster.'_hosts.tab') or
       die('file generation error');
       print(OUT $line2insert);
+      print OUT ("^$desiredhostname:$protocol\n");
+    close(OUT);
+    open(OUT,'&gt;../'.$lonCluster.'_dns_hosts.tab') or
+      die('file generation error');
+      print(OUT $line2insert);
     close(OUT);
     open(OUT,'&gt;../'.$lonCluster.'_domain.tab') or
       die('file generation error');
       print(OUT $domaininsert);
     close(OUT);
+    open(OUT,'&gt;../'.$lonCluster.'_dns_domain.tab') or
+      die('file generation error');
+      print(OUT $domaininsert);
+    close(OUT);
   }
   if ($flag==1) {
     `rm -f ../hosts.tab`;
-    open(IN,'&lt;../'.$lonCluster.'_hosts.tab');
-    while(&lt;IN&gt;) {
-      if (/^$line2insert$/) {
+    `rm -f ../dns_hosts.tab`;
+    `ln -s ${lonCluster}_dns_hosts.tab ../dns_hosts.tab`;
+    open(IN,'&lt;../'.$lonCluster.'_dns_hosts.tab');
+    while(my $line = &lt;IN&gt;) {
+      if ($line =~ /^\Q$line2insert\E$/) {
         $lineexistflag=1;
       }
-      if (/^$lonHostID\:/) {
+      if ($line =~ /^\Q$lonHostID\E\:/) {
         $hostidexistflag=1;
       }
     }
@@ -791,9 +1158,9 @@ END
     if ($hostidexistflag and !$lineexistflag) {
       print &lt;&lt;END;
 WARNING: $lonHostID already exists inside
-loncapa/loncom/${lonCluster}_hosts.tab.  The entry inside
-${lonCluster}_hosts.tab does not match your settings.
-The entry inside ${lonCluster}_hosts.tab is being replaced
+loncapa/loncom/${lonCluster}_dns_hosts.tab.  The entry inside
+${lonCluster}_dns_hosts.tab does not match your settings.
+An entry inside ${lonCluster}_hosts.tab will be made
 with your new values.
 END
       `grep -v "$lonHostID:" ../${lonCluster}_hosts.tab &gt; ../new_${lonCluster}_hosts.tab`;
@@ -803,15 +1170,20 @@ END
        close(OUT);
       `ln -s new_${lonCluster}_hosts.tab ../hosts.tab`;
       # email appropriate message
-      `echo "REPLACE:$lonCluster:$lonHostID:$date:$line2insert" | mail -s "REPLACE:$lonCluster:$lonHostID:$date" installrecord\@mail.lon-capa.org`;
+      `echo "REPLACE:$lonCluster:$lonHostID:$date:$line2insert" | mail -s "REPLACE:$lonCluster:$lonHostID:$protocol:$intdom:$date" installrecord\@mail.lon-capa.org`;
     }
     elsif ($hostidexistflag and $lineexistflag) {
       print &lt;&lt;END;
-Entry exists in ${lonCluster}_hosts.tab.
+Entry exists in ${lonCluster}_dns_hosts.tab. Making duplicate entry in ${lonCluster}_hosts.tab
 END
-      `ln -s ${lonCluster}_hosts.tab ../hosts.tab`;
+      `grep -v "$lonHostID:" ../${lonCluster}_hosts.tab &gt; ../new_${lonCluster}_hosts.tab`;
+       open(OUT,'&gt;&gt;../new_'.$lonCluster.'_hosts.tab') or
+         die("cannot open loncom/${lonCluster}_hosts.tab for output\n");
+         print(OUT $line2insert);
+       close(OUT);
+      `ln -s new_${lonCluster}_hosts.tab ../hosts.tab`;
       # email appropriate message
-      `echo "STABLEUPDATE:$lonCluster:$lonHostID:$date:$line2insert" | mail -s "STABLEUPDATE:$lonCluster:$lonHostID:$date" installrecord\@mail.lon-capa.org`;
+      `echo "STABLEUPDATE:$lonCluster:$lonHostID:$date:$line2insert" | mail -s "STABLEUPDATE:$lonCluster:$lonHostID:$protocol:$intdom:$date" installrecord\@mail.lon-capa.org`;
     }
     elsif (!$hostidexistflag and !$lineexistflag) {
       print &lt;&lt;END;
@@ -824,18 +1196,21 @@ END
        close(OUT);
       `ln -s new_${lonCluster}_hosts.tab ../hosts.tab`;
       # email appropriate message
-      `echo "INSERT:$lonCluster:$lonHostID:$date:$line2insert" | mail -s "INSERT:$lonCluster:$lonHostID:$date" installrecord\@mail.lon-capa.org`;
+      `echo "INSERT:$lonCluster:$lonHostID:$date:$line2insert" | mail -s "INSERT:$lonCluster:$lonHostID:$protocol:$intdom:$date" installrecord\@mail.lon-capa.org`;
     }
   }
   $lineexistflag=0;
+  my $domainexistflag=0;
   if ($flag==1) {
     `rm -f ../domain.tab`;
-    open(IN,'&lt;../'.$lonCluster.'_domain.tab');
-    while(&lt;IN&gt;) {
-      if (/^$domaininsert$/) {
+    `rm -f ../dns_domain.tab`;
+    `ln -s ${lonCluster}_dns_domain.tab ../dns_domain.tab`;
+    open(IN,'&lt;../'.$lonCluster.'_dns_domain.tab');
+    while(my $line = &lt;IN&gt;) {
+      if ($line =~/^\Q$domaininsert\E$/) {
         $lineexistflag=1;
       }
-      if (/^$perlvar{'lonDefDomain'}\:/) {
+      if ($line =~/^\Q$perlvar{'lonDefDomain'}\E\:/) {
         $domainexistflag=1;
       }
     }
@@ -843,9 +1218,9 @@ END
     if ($domainexistflag and !$lineexistflag) {
       print &lt;&lt;END;
 WARNING: $perlvar{'lonDefDomain'} already exists inside
-loncapa/loncom/${lonCluster}_domain.tab.  The entry inside
-${lonCluster}_domain.tab does not match your settings.
-The entry inside ${lonCluster}_domain.tab is being replaced
+loncapa/loncom/${lonCluster}_dns_domain.tab.  The entry inside
+${lonCluster}_dns_domain.tab does not match your settings.
+An entry will be made in inside ${lonCluster}_domain.tab
 with your new values.
 END
       `grep -v "$perlvar{'lonDefDomain'}:" ../${lonCluster}_domain.tab &gt; ../new_${lonCluster}_domain.tab`;
@@ -855,13 +1230,18 @@ END
        close(OUT);
       `ln -s new_${lonCluster}_domain.tab ../domain.tab`;
       # email appropriate message
-      `echo "REPLACEdom:$lonCluster:$lonHostID:$date:$domaninsert" | mail -s "REPLACEdom:$lonCluster:$lonHostID:$date" installrecord\@mail.lon-capa.org`;
+      `echo "REPLACEdom:$lonCluster:$lonHostID:$date:$domaininsert" | mail -s "REPLACEdom:$lonCluster:$lonHostID:$date" installrecord\@mail.lon-capa.org`;
     }
     elsif ($domainexistflag and $lineexistflag) {
+      `grep -v "$perlvar{'lonDefDomain'}:" ../${lonCluster}_domain.tab &gt; ../new_${lonCluster}_domain.tab`;
+       open(OUT,'&gt;&gt;../new_'.$lonCluster.'_domain.tab') or
+         die("cannot open loncom/${lonCluster}_domain.tab for output\n");
+         print(OUT $domaininsert);
+       close(OUT);
       print &lt;&lt;END;
-Entry exists in ${lonCluster}_domain.tab.
+Entry exists in ${lonCluster}_dns_domain.tab. Making duplicate entry in ${lonCluster}_domain.tab
 END
-      `ln -s ${lonCluster}_domain.tab ../domain.tab`;
+      `ln -s new_${lonCluster}_domain.tab ../domain.tab`;
       # email appropriate message
       `echo "STABLEUPDATEdom:$lonCluster:$lonHostID:$date:$domaininsert" | mail -s "STABLEUPDATEdom:$lonCluster:$lonHostID:$date" installrecord\@mail.lon-capa.org`;
     }