--- doc/loncapafiles/updatequery.piml	2003/02/03 18:03:51	1.24
+++ doc/loncapafiles/updatequery.piml	2005/07/01 18:21:47	1.39
@@ -1,6 +1,6 @@
 <!-- updatequery.piml -->
 
-<!-- $Id: updatequery.piml,v 1.24 2003/02/03 18:03:51 harris41 Exp $ -->
+<!-- $Id: updatequery.piml,v 1.39 2005/07/01 18:21:47 albertel Exp $ -->
 
 <!--
 
@@ -57,17 +57,22 @@ unless (-l "<TARGET />") {
   print(&lt;&lt;END);
 
 ===============================================================================
-What hosts.tab would you like to have installed?
-(hosts.tab is a listing of all other internet machines
-that a server system considers to be valid server systems
-on the LON-CAPA network)
-
-1) PRODUCTION - you want to deliver courses today or sometime very soon
-                on this machine
+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.
+
+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
 2) STAND-ALONE - you want this machine to run in 'stand-alone' mode and
                  not be connected to other LON-CAPA machines for now
-3) DEVELOPMENT - you want to play with or explore LON-CAPA
-4) PRESERVE the existing hosts.tab (/home/httpd/lonTabs/hosts.tab)
+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)
 
 END
 # Option number 26 will install rawhide_hosts.tab, but
@@ -101,6 +106,15 @@ There is no existing /home/httpd/lonTabs
 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('');
+    }
   }
   elsif ($choice==26) {
     $lonCluster='rawhide'; $flag=1;
@@ -114,12 +128,13 @@ END
 <perlscript mode='fg'>
 $|=1;
 my $domainDescription;
+my $domainTabExtras;
 unless (-e "<TARGET />") {
   print(&lt;&lt;END);
            WELCOME TO LON-CAPA!
 
 If you have questions, please visit http://install.lon-capa.org
-or contact sharrison\@mail.lon-capa.org.
+or contact helpdesk\@lon-capa.org.
 
 ===============================================================================
 The following 4 values are needed to configure LON-CAPA:
@@ -127,6 +142,13 @@ The following 4 values are needed to con
 * LON-CAPA Domain Name
 * LON-CAPA Machine ID Name, and
 * System Administration E-mail Address.
+===============================================================================
+
+In addition, a Support E-mail Address can also be included. If
+an address is included then one of the options in the LON-CAPA 
+help menu will be a link to a form that a user will complete to
+request LON-CAPA help.  
+
 END
 
 open(OUT,'&gt;/tmp/loncapa_updatequery.out');
@@ -174,7 +196,7 @@ while (!$flag) {
 }
 
 # need to recommend a machine ID name (ipdomain.l.somenumber)
-my $hostname=`hostname`; chomp($hostname);
+my $hostname=`hostname -f`; chomp($hostname);
 my $ipdomain='';
 if ($hostname=~/([^\.]*)\.([^\.]*)$/) {
   $ipdomain=$1;
@@ -184,7 +206,17 @@ if ($hostname=~/([^\.]*)\.([^\.]*)$/) {
 
 **** Domain ****
 [this does NOT need to correspond to internet address domains,
- examples might be "msu" or "bionet" or "vermontcc"]
+ 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 "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.]
 END
 
 # get domain name
@@ -205,10 +237,13 @@ 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');
   foreach my $bad (@bad_domain_names) {
     $bad_domain_flag=1 if $choice eq $bad;
   }
+  if ($choice=~/capa/i) {
+     $bad_domain_flag=1;
+  }
   if ($ipdomain and $choice=~/^\s*$/) {
     $choice=$ipdomain;
     open(OUT,'&gt;&gt;/tmp/loncapa_updatequery.out');
@@ -216,20 +251,21 @@ END
     close(OUT);
     $lonDefDomain=$choice;
     $flag=1;
-  }
-  elsif ($choice!~/\_/ and $choice=~/^\w+$/) {
+  } elsif (length($choice)>12) {
+    print "Name too long\n";
+  } elsif (length($choice)<2) {
+    print "Name too short\n";
+  } 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 {
+  } else {
     print "Invalid input (only alphanumeric characters supported).\n";
   }
 }
@@ -274,8 +310,9 @@ if ($lonDefDomain) {
 [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 "bionetl1";
- bad examples: "loncapabox" or "studentsinside"]
+ good examples: "msul1" or "bioneta2";
+ bad examples: "loncapabox" or "studentsinside".
+ Note that machine names are very hard to change later.]
 END
 # get machine name
 # accept if valid, if not valid, tell user and repeat
@@ -293,27 +330,31 @@ END
 }
   my $choice=&lt;&gt;;
   chomp($choice);
-  if ($lonHostID and $choice=~/^\s*$/) {
+  if ($choice=~/capa/i) {
+    print "Invalid input (names containing 'capa' are reserved).\n";
+  } elsif ($lonHostID and $choice=~/^\s*$/) {
     $choice=$lonHostID;
     open(OUT,'&gt;&gt;/tmp/loncapa_updatequery.out');
     print(OUT 'lonHostID'."\t".$choice."\n");
     close(OUT);
     $lonHostID=$choice;
     $flag=1;
-  }
-  elsif ($choice!~/\_/ and $choice=~/^\w+$/) {
+  } elsif (length($choice)>15) {
+    print "Name too long\n";
+  } elsif (length($choice)<4) {
+    print "Name too short\n";
+  } elsif ($choice!~/\_/ and $choice=~/^\w+$/) {
     open(OUT,'&gt;&gt;/tmp/loncapa_updatequery.out');
     print(OUT 'lonHostID'."\t".$choice."\n");
     close(OUT);
     $lonHostID=$choice;
     $flag=1;
-  }
-  else {
+  } else {
     print "Invalid input (only alphanumeric characters supported).\n";
   }
 }
 
-# get e-mail address
+# get admin e-mail address
 # accept if valid, if not valid, tell user and repeat
 $flag=0;
 my $lonAdmEMail;
@@ -323,7 +364,7 @@ while (!$flag) {
 **** System Administrator's E-mail ****
 E-mail address of the person who will manage this machine
 [should be in the form somebody\@somewhere]
-ENTER E-MAIL ADDRESS:
+ENTER ADMIN E-MAIL ADDRESS:
 END
 
   my $choice=&lt;&gt;;
@@ -340,6 +381,40 @@ END
   }
 }
 
+
+# get support e-mail address
+# accept if valid, if not valid, tell user and repeat
+$flag=0;
+my $lonSupportEMail;
+while (!$flag) {
+  print(&lt;&lt;END);
+
+**** Support E-mail ****
+E-mail address of the person who will receive 
+help requests from LON-CAPA users who access 
+the system via this server. If the address is left blank,
+then a help support form will not be displayed 
+as part of the help menu.
+[should be in the form somebody\@somewhere]
+ENTER SUPPORT E-MAIL ADDRESS:
+END
+
+  my $choice=&lt;&gt;;
+  chomp($choice);
+  $choice =~ s/\s//g;
+  if ( ($choice=~/\@/) || $choice eq '') {
+    open(OUT,'&gt;&gt;/tmp/loncapa_updatequery.out');
+    print(OUT 'lonSupportEMail'."\t".$choice."\n");
+    close(OUT);
+    $lonSupportEMail=$choice;
+    $flag=1;
+  }
+  else {
+    print "Invalid input (this either needs to be blank, or look like an e-mail address!).\n";
+  }
+}
+
+
 # update loncapa.conf
 my $confdir='/etc/httpd/conf/';
 #my $confdir='';
@@ -359,10 +434,14 @@ my %perlvar;
     $perlvar{'lonHostID'}=$lonHostID;
     $perlvar{'lonDefDomain'}=$lonDefDomain;
     $perlvar{'lonAdmEMail'}=$lonAdmEMail;
+    $perlvar{'lonSupportEMail'}=$lonSupportEMail;
     $perlvar{'lonRole'}=$lonRole;
     unless ($perlvar{'lonLoadLim'} and $perlvar{'lonLoadLim'}!~/\{\[\[\[\[/) {
        $perlvar{'lonLoadLim'}='2.00';
     }
+    unless ($perlvar{'lonUserLoadLim'} and $perlvar{'lonUserLoadLim'}!~/\{\[\[\[\[/) {
+       $perlvar{'lonUserLoadLim'}='0';
+    }
     unless ($perlvar{'lonExpire'} and $perlvar{'lonExpire'}!~/\{\[\[\[\[/) {
        $perlvar{'lonExpire'}='86400';
     }
@@ -390,10 +469,26 @@ END
 <file>
 <target dist='default'>/</target>
 <perlscript mode='fg'>
+sub securesetting {
+    my (%perlvar)=@_;
+    my $securestatus='unknown';
+    my $securenum='';
+    if      ( $perlvar{'loncAllowInsecure'}&&  $perlvar{'londAllowInsecure'}) {
+	$securestatus='no';                  $securenum='4';
+    } elsif ( $perlvar{'loncAllowInsecure'}&& !$perlvar{'londAllowInsecure'}) {
+	$securestatus='lond';                $securenum='3';
+    } elsif (!$perlvar{'loncAllowInsecure'}&&  $perlvar{'londAllowInsecure'}) {
+	$securestatus='lonc';                $securenum='2';
+    } elsif (!$perlvar{'loncAllowInsecure'}&& !$perlvar{'londAllowInsecure'}) {
+	$securestatus='yes (lond and lonc)'; $securenum='1';
+    }
+    return ($securestatus,$securenum);
+}
 # read values from loncapa.conf
 my $confdir='/etc/httpd/conf/';
 my $filename='loncapa.conf';
 my %perlvar;
+my ($securestatus,$securenum);
     if (-e "$confdir$filename") {
 	open(CONFIG,'&lt;'.$confdir.$filename) or 
           die("Can't read $confdir$filename");
@@ -409,9 +504,19 @@ my %perlvar;
     unless ($perlvar{'lonLoadLim'} and $perlvar{'lonLoadLim'}!~/\{\[\[\[\[/) {
        $perlvar{'lonLoadLim'}='2.00';
     }
+    unless ($perlvar{'lonUserLoadLim'} and $perlvar{'lonUserLoadLim'}!~/\{\[\[\[\[/) {
+       $perlvar{'lonUserLoadLim'}='0';
+    }
     unless ($perlvar{'lonExpire'} and $perlvar{'lonExpire'}!~/\{\[\[\[\[/) {
        $perlvar{'lonExpire'}='86400';
     }
+    unless ($perlvar{'londAllowInsecure'} and $perlvar{'londAllowInsecure'}!~/\{\[\[\[\[/) {
+       $perlvar{'londAllowInsecure'}='1';
+    }
+    unless ($perlvar{'loncAllowInsecure'} and $perlvar{'loncAllowInsecure'}!~/\{\[\[\[\[/) {
+       $perlvar{'loncAllowInsecure'}='1';
+    }
+    ($securestatus,$securenum)=&securesetting(%perlvar);
     unless ($perlvar{'lonReceipt'} and $perlvar{'lonReceipt'}!~/\{\[\[\[\[/) {
        my $lonReceipt='';
        srand(time ^ $$ ^ unpack "%L*", `ps axww | gzip`);
@@ -435,22 +540,24 @@ my %perlvarstatic;
 	close(CONFIG);
     }
     if (!$domainDescription && $lonCluster ne 'existing') {
-       open(IN,'&lt;../'.$lonCluster.'_hosts.tab');
+       open(IN,'&lt;../'.$lonCluster.'_domain.tab');
        while(&lt;IN&gt;) {
-          if (/^$perlvar{'lonHostID'}\:/) {
-	     (undef,undef,undef,undef,undef,$domainDescription)=split(/:/,$_);
+          if (/^$perlvar{'lonDefDomain'}\:/) {
+	     (undef,$domainDescription,$domainTabExtras)=split(/:/,$_,3);
 	     chomp($domainDescription);
+	     chomp($domainTabExtras);
              last;
           }
        }
        close(IN);
     }
     if (!$domainDescription) {
-       open(IN,'&lt;/home/httpd/lonTabs/hosts.tab');
+       open(IN,'&lt;/home/httpd/lonTabs/domain.tab');
        while(&lt;IN&gt;) {
-          if (/^$perlvar{'lonHostID'}\:/) {
-	     (undef,undef,undef,undef,undef,$domainDescription)=split(/:/,$_);
+          if (/^$perlvar{'lonDefDomain'}\:/) {
+	     (undef,$domainDescription,$domainTabExtras)=split(/:/,$_,3);
 	     chomp($domainDescription);
+	     chomp($domainTabExtras);
              last;
           }
        }
@@ -467,41 +574,46 @@ while (!$flag) {
 
 ===============================================================================
 This is now the current configuration of your machine.
-1) Domain Name: $perlvar{'lonDefDomain'}
-2) Domain Description: $domainDescription
-3) Machine Name: $perlvar{'lonHostID'}
-4) System Administrator's E-mail Address: $perlvar{'lonAdmEMail'}
-5) Role: $perlvar{'lonRole'}
-6) Cache Expiration Time: $perlvar{'lonExpire'}
-7) Server Load: $perlvar{'lonLoadLim'}
-8) 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";
+ 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 $error='';
+foreach my $v ($perlvar{'lonDefDomain'},$perlvar{'lonHostID'}) {
+   if (length($v)>16) { $error.="\nName $v too long"; }		
+   if (length($v)<2) { $error.="\nName $v too short"; }
+   if ($v=~/capa/i) {
+	if ($v!~/^oucapa\d+$/ && 
+	    ($v!~/^capa\d+$/ && $perlvar{'lonDefDomain'} eq 'uwsp')) {
+		 $error.="\nName $v contains 'capa'"; 
+	}
+   }
+   foreach my $bad ('res','raw','userfiles','priv','adm','uploaded') {
+      $error.="\nName $v reserved." if $v eq $bad;
+   }
+   if ($v=~/\W/) { $error.="\nName $v contains special characters"; }
+}
+if ($domainDescription!~/^[\w\s]+$/) {
+   $error.="\nDomain Description contains special characters";
+} 
+foreach my $v ($perlvar{'lonExpire'},$perlvar{'lonLoadLim'}) {
+   unless ($v=~/^[\d+\.]+$/) { $error.="\nNumber expected instead of $v"; }
 }
-if ($dbug) {
-  print "**** ERROR **** ".
-	"Invalid lonDefDomain (should only be letters and/or digits)\n";
+unless (($perlvar{'lonRole'} eq 'library') || ($perlvar{'lonRole'} eq 'access')) {
+   $error.="\nInvalid Role";
 }
-
+if ($error) { print "\n*** ERRORS: $error\n"; }
   print(&lt;&lt;END);
-ENTER A CHOICE OF 1-7 TO CHANGE, otherwise ENTER 8:
+ENTER A CHOICE OF 1-10 TO CHANGE, otherwise ENTER 11:
 END
 my $choice=&lt;&gt;;
 chomp($choice);
@@ -550,7 +662,16 @@ END
   }
   elsif ($choice==5) {
   print(&lt;&lt;END);
-5) Role: $perlvar{'lonRole'}
+5) Support E-mail Address: $perlvar{'lonSupportEMail'}
+ENTER NEW VALUE:
+END
+    my $choice2=&lt;&gt;;
+    chomp($choice2);
+    $perlvar{'lonSupportEMail'}=$choice2;
+  }
+  elsif ($choice==6) {
+  print(&lt;&lt;END);
+6) Role: $perlvar{'lonRole'}
 ENTER NEW VALUE (this should be either 'access' or 'library' 
                  if in doubt select 'library'):
 END
@@ -558,29 +679,68 @@ END
     chomp($choice2);
     $perlvar{'lonRole'}=$choice2;
   }
-  elsif ($choice==6) {
+  elsif ($choice==7) {
   print(&lt;&lt;END);
-6) Cache Expiration Time: $perlvar{'lonExpire'}
+7) 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 ($choice==7) {
+  elsif ($choice==8) {
   print(&lt;&lt;END);
-7) Server Load: $perlvar{'lonLoadLim'}
+8) Server Load: $perlvar{'lonLoadLim'}
 ENTER NEW VALUE:
 END
     my $choice2=&lt;&gt;;
     chomp($choice2);
     $perlvar{'lonLoadLim'}=$choice2;
   }
-  elsif ($choice==8) {
+  elsif ($choice==9) {
+  print(&lt;&lt;END);
+9) 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
+    my $choice2=&lt;&gt;;
+    chomp($choice2);
+    $perlvar{'lonUserLoadLim'}=$choice2;
+  }
+  elsif ($choice==10) {
+  print(&lt;&lt;END);
+10) Allow only secure connections: $securestatus 
+The Lon-CAPA communication daemons lonc and lond can be configured to
+allow only secure connections by default.
+
+POSSIBLE CHOICES:
+1) allow only secure connections and don't connect to machines that
+    can not be connected to securely
+2) allow only secure connections but allow this machine to connect to 
+    machines that don't support secure connections
+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):
+END
+    my $choice2=&lt;&gt;;
+    chomp($choice2);
+    if      ($choice2 eq '1') {
+	$perlvar{'loncAllowInsecure'}=0;$perlvar{'londAllowInsecure'}=0;
+    } elsif ($choice2 eq '2') {
+	$perlvar{'loncAllowInsecure'}=0;$perlvar{'londAllowInsecure'}=1;
+    } elsif ($choice2 eq '3') {
+	$perlvar{'loncAllowInsecure'}=1;$perlvar{'londAllowInsecure'}=0;
+    } elsif ($choice2 eq '4') {
+	$perlvar{'loncAllowInsecure'}=1;$perlvar{'londAllowInsecure'}=1;
+    }
+    ($securestatus,$securenum)=&securesetting(%perlvar);
+  }
+  elsif (($choice==11) && (!$error)) {
     $flag=1;
   }
   else {
-
+    print "Invalid input.\n";
   }
 }
     open(OUT,"&gt;$confdir$filename") or
@@ -598,22 +758,25 @@ END
 <target dist='default'>loncom/hosts.tab</target>
 <perlscript mode='fg'>
 unless (-l "<TARGET />") {
-  my $hostname=`hostname`;chomp($hostname);
-  my $hostaddress=`hostname -i $hostname`;chomp($hostaddress);
-  $hostaddress=~s/\s//;
+  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'}:$hostname:$hostaddress:$domainDescription
+$perlvar{'lonHostID'}:$perlvar{'lonDefDomain'}:$perlvar{'lonRole'}:$hostname
 END
+  $domaininsert="$perlvar{'lonDefDomain'}:$domainDescription:$domainTabExtras\n";
   if ($lonCluster eq 'standalone') {
     open(OUT,'&gt;../'.$lonCluster.'_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 $domaininsert);
+    close(OUT);
   }
   if ($flag==1) {
     `rm -f ../hosts.tab`;
@@ -642,8 +805,7 @@ END
        close(OUT);
       `ln -s new_${lonCluster}_hosts.tab ../hosts.tab`;
       # email appropriate message
-      system('ping -c 1 www.lon-capa.org > /dev/null || ping -c 1 www.msu.edu > /dev/null || ping -c 1 www.mit.edu > /dev/null');
-      `echo "REPLACE:$lonCluster:$lonHostID:$date:$line2insert" | mail -s "REPLACE:$lonCluster:$lonHostID:$date" installrecord\@mail.lon-capa.org` unless $?;
+      `echo "REPLACE:$lonCluster:$lonHostID:$date:$line2insert" | mail -s "REPLACE:$lonCluster:$lonHostID:$date" installrecord\@mail.lon-capa.org`;
     }
     elsif ($hostidexistflag and $lineexistflag) {
       print &lt;&lt;END;
@@ -667,6 +829,58 @@ END
       `echo "INSERT:$lonCluster:$lonHostID:$date:$line2insert" | mail -s "INSERT:$lonCluster:$lonHostID:$date" installrecord\@mail.lon-capa.org`;
     }
   }
+  $lineexistflag=0;
+  if ($flag==1) {
+    `rm -f ../domain.tab`;
+    open(IN,'&lt;../'.$lonCluster.'_domain.tab');
+    while(&lt;IN&gt;) {
+      if (/^$domaininsert$/) {
+        $lineexistflag=1;
+      }
+      if (/^$perlvar{'lonDefDomain'}\:/) {
+        $domainexistflag=1;
+      }
+    }
+    close(IN);
+    if ($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 ${lonCluster}_domain.tab is being replaced
+with your new values.
+END
+      `grep -v "$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 $domaininsert);
+       close(OUT);
+      `ln -s new_${lonCluster}_domain.tab ../domain.tab`;
+      # email appropriate message
+      `echo "REPLACEdom:$lonCluster:$lonHostID:$date:$domaninsert" | mail -s "REPLACEdom:$lonCluster:$lonHostID:$date" installrecord\@mail.lon-capa.org`;
+    }
+    elsif ($domainexistflag and $lineexistflag) {
+      print &lt;&lt;END;
+Entry exists in ${lonCluster}_domain.tab.
+END
+      `ln -s ${lonCluster}_domain.tab ../domain.tab`;
+      # email appropriate message
+      `echo "STABLEUPDATEdom:$lonCluster:$lonHostID:$date:$domaininsert" | mail -s "STABLEUPDATEdom:$lonCluster:$lonHostID:$date" installrecord\@mail.lon-capa.org`;
+    }
+    elsif (!$domainexistflag and !$lineexistflag) {
+      print &lt;&lt;END;
+New entry for $lonCluster.
+END
+      `cat ../${lonCluster}_domain.tab &gt; ../new_${lonCluster}_domain.tab`;
+       open(OUT,'&gt;&gt;../new_'.$lonCluster.'_domain.tab') or
+         die("cannot open loncom/new_${lonCluster}_domain.tab for output\n");
+         print(OUT $domaininsert);
+       close(OUT);
+      `ln -s new_${lonCluster}_domain.tab ../domain.tab`;
+      # email appropriate message
+      `echo "INSERTdom:$lonCluster:$lonHostID:$date:$domaininsert" | mail -s "INSERTdom:$lonCluster:$lonHostID:$date" installrecord\@mail.lon-capa.org`;
+    }
+  }
 }
 </perlscript>
 </file>