--- doc/loncapafiles/updatequery.piml	2002/05/16 15:29:15	1.9
+++ doc/loncapafiles/updatequery.piml	2004/06/01 15:55:00	1.31
@@ -1,7 +1,6 @@
 <!-- updatequery.piml -->
-<!-- Scott Harrison -->
 
-<!-- $Id: updatequery.piml,v 1.9 2002/05/16 15:29:15 harris41 Exp $ -->
+<!-- $Id: updatequery.piml,v 1.31 2004/06/01 15:55:00 albertel Exp $ -->
 
 <!--
 
@@ -52,9 +51,84 @@ sleep(3);
 </perlscript>
 </file>
 <file>
-<target dist='default'>/home/httpd/lonUsers2/</target>
+<target dist='default'>loncom/hosts.tab</target>
+<perlscript mode='fg'>
+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.
+
+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 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
+# the typical user does not want to be part of an intensive
+# machine test cluster.
+
+# get input
+# if valid then process, otherwise loop
+$flag=0;
+while (!$flag) {
+  print "ENTER 1, 2, 3, or 4:\n";
+  my $choice=&lt;&gt;;
+  chomp($choice);
+  if ($choice==1) {
+    $lonCluster='production'; $flag=1;
+  }
+  elsif ($choice==2) {
+    $lonCluster='standalone'; $flag=1;
+  }
+  elsif ($choice==3) {
+    $lonCluster='development'; $flag=1;
+  }
+  elsif ($choice==4) {
+    $lonCluster='existing'; $flag=1;
+    if (-e '/home/httpd/lonTabs/hosts.tab') {
+      `cp /home/httpd/lonTabs/hosts.tab ../existing_hosts.tab`;
+    }
+    else {
+      print &lt;&lt;END;
+There is no existing /home/httpd/lonTabs/hosts.tab
+END
+      die('');
+    }
+    if (-e '/home/httpd/lonTabs/domain.tab') {
+      `cp /home/httpd/lonTabs/domain.tab ../existing_domain.tab`;
+    }
+    else {
+      print &lt;&lt;END;
+There is no existing /home/httpd/lonTabs/domain.tab
+END
+      die('');
+    }
+  }
+  elsif ($choice==26) {
+    $lonCluster='rawhide'; $flag=1;
+  }
+}
+}
+</perlscript>
+</file>
+<file>
+<target dist='default'>/home/httpd/lonTabs/hosts.tab</target>
 <perlscript mode='fg'>
 $|=1;
+my $domainDescription;
+my $domainTabExtras;
 unless (-e "<TARGET />") {
   print(&lt;&lt;END);
            WELCOME TO LON-CAPA!
@@ -145,6 +219,11 @@ END
 }
   my $choice=&lt;&gt;;
   chomp($choice);
+  my $bad_domain_flag=0;
+  my @bad_domain_names=('raw','userfiles','priv','adm','uploaded');
+  foreach my $bad (@bad_domain_names) {
+    $bad_domain_flag=1 if $choice eq $bad;
+  }
   if ($ipdomain and $choice=~/^\s*$/) {
     $choice=$ipdomain;
     open(OUT,'&gt;&gt;/tmp/loncapa_updatequery.out');
@@ -161,11 +240,43 @@ END
     $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";
   }
 }
 
+
+# get domain description
+# accept if valid, if not valid, tell user and repeat
+$flag=0;
+
+while (!$flag) {
+  print(&lt;&lt;END);
+
+**** Domain Description ****
+String describing the domain, to be shown to users.
+[Example, msu is Michigan State University]
+ENTER DOMAIN DESCRIPTION:
+END
+
+  my $choice=&lt;&gt;;
+  chomp($choice);
+  if ($choice!~/:/) {
+    open(OUT,'&gt;&gt;/tmp/loncapa_updatequery.out');
+    print(OUT 'domainDescription'."\t".$choice."\n");
+    close(OUT);
+    $domainDescription=$choice;
+    $flag=1;
+  }
+  else {
+    print "Invalid input (no ':' allowed).\n";
+  }
+}
+
 my $lonHostID;
 if ($lonDefDomain) {
   $lonHostID=$lonDefDomain.$r.int(1+rand(9)); # should be probably also detect
@@ -255,7 +366,7 @@ my %perlvar;
 	    if ($configline =~ /^[^\#]*PerlSetVar/) {
 		my ($unused,$varname,$varvalue)=split(/\s+/,$configline);
 		chomp($varvalue);
-		$perlvar{$varname}=$varvalue;
+		$perlvar{$varname}=$varvalue if $varvalue!~/^\{\[\[\[\[/;
 	    }
 	}
 	close(CONFIG);
@@ -264,18 +375,18 @@ my %perlvar;
     $perlvar{'lonDefDomain'}=$lonDefDomain;
     $perlvar{'lonAdmEMail'}=$lonAdmEMail;
     $perlvar{'lonRole'}=$lonRole;
-    unless ($perlvar{'lonSqlAccess'}) {
-       $perlvar{'lonSqlAccess'}='localhostkey';
-    }
-    unless ($perlvar{'lonLoadLim'}) {
+    unless ($perlvar{'lonLoadLim'} and $perlvar{'lonLoadLim'}!~/\{\[\[\[\[/) {
        $perlvar{'lonLoadLim'}='2.00';
     }
-    unless ($perlvar{'lonExpire'}) {
+    unless ($perlvar{'lonUserLoadLim'} and $perlvar{'lonUserLoadLim'}!~/\{\[\[\[\[/) {
+       $perlvar{'lonUserLoadLim'}='0';
+    }
+    unless ($perlvar{'lonExpire'} and $perlvar{'lonExpire'}!~/\{\[\[\[\[/) {
        $perlvar{'lonExpire'}='86400';
     }
-    unless ($perlvar{'lonReceipt'}) {
+    unless ($perlvar{'lonReceipt'} and $perlvar{'lonReceipt'}!~/\{\[\[\[\[/) {
        my $lonReceipt='';
-       srand($$.time);
+       srand(time ^ $$ ^ unpack "%L*", `ps axww | gzip`);
        my @alnum=(0..9,a..z);
        foreach my $i (1..20) {
 	 $lonReceipt.=$alnum[int(rand(36))];
@@ -297,11 +408,26 @@ 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 $confdir='';
 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");
@@ -314,6 +440,31 @@ my %perlvar;
 	}
 	close(CONFIG);
     }
+    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`);
+       my @alnum=(0..9,a..z);
+       foreach my $i (1..20) {
+	 $lonReceipt.=$alnum[int(rand(36))];
+       }
+       $perlvar{'lonReceipt'}=$lonReceipt;
+    }
 my %perlvarstatic;
     if (-e "${confdir}loncapa_apache.conf") {
 	open(CONFIG,'&lt;'.$confdir.'loncapa_apache.conf') or 
@@ -327,32 +478,88 @@ 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);
+    }
+    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);
+    }
+   
 # implement editing logic below, interactively
-# update loncapa.conf until 7 is entered
+# update loncapa.conf until 8 is entered
 
 $flag=0;
+
 while (!$flag) {
   print(&lt;&lt;END);
 
 ===============================================================================
 This is now the current configuration of your machine.
-1) Domain Name: $perlvar{'lonDefDomain'}
-2) Machine Name: $perlvar{'lonHostID'}
-3) System Administrator's E-mail Address: $perlvar{'lonAdmEMail'}
-4) Role: $perlvar{'lonRole'}
-5) Cache Expiration Time: $perlvar{'lonExpire'}
-6) Server Load: $perlvar{'lonLoadLim'}
-7) Everything is correct up above
-END
+ 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) User Load: $perlvar{'lonUserLoadLim'}
+ 9) Allow only secure connections: $securestatus 
+10) 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";
+}
+
   print(&lt;&lt;END);
-ENTER A CHOICE OF 1-6 TO CHANGE, otherwise ENTER 7:
+ENTER A CHOICE OF 1-9 TO CHANGE, otherwise ENTER 10:
 END
 my $choice=&lt;&gt;;
 chomp($choice);
   if ($choice==1) {
   print(&lt;&lt;END);
-2) Domain Name: $perlvar{'lonDefDomain'}
-ENTER NEW VALUE:
+1) Domain Name: $perlvar{'lonDefDomain'}
+ENTER NEW VALUE (this is an internal value used to identify a group of
+                 LON-CAPA machines, it must be alphanumerical, we suggest
+                 using a part of your actual DNS domain. For example, for
+                 the machine loncapa.msu.edu, we set the Domain to msu):
 END
     my $choice2=&lt;&gt;;
     chomp($choice2);
@@ -360,50 +567,103 @@ END
   }
   elsif ($choice==2) {
   print(&lt;&lt;END);
-1) Machine Name: $perlvar{'lonHostID'}
-ENTER NEW VALUE:
+2) Domain Description: $domainDescription
+ENTER NEW VALUE (this should be a string that describes your domain, spaces
+                 and punctuation are fine except for ':'):
 END
     my $choice2=&lt;&gt;;
     chomp($choice2);
-    $perlvar{'lonHostID'}=$choice2;
+    $domainDescription=$choice2;
   }
   elsif ($choice==3) {
   print(&lt;&lt;END);
-3) System Administrator's E-mail Address: $perlvar{'lonAdmEMail'}
-ENTER NEW VALUE:
+3) Machine Name: $perlvar{'lonHostID'}
+ENTER NEW VALUE (this will be the name of the machine in the LON-CAPA network
+                 it cannot contain any of '_' '-' '.' or ':'. We suggest that
+                 if you are in the domain 'example' and are the first library
+                 server you enter 'examplel1') :
 END
     my $choice2=&lt;&gt;;
     chomp($choice2);
-    $perlvar{'lonAdmEMail'}=$choice2;
+    $perlvar{'lonHostID'}=$choice2;
   }
   elsif ($choice==4) {
   print(&lt;&lt;END);
-4) Role: $perlvar{'lonRole'}
+4) System Administrator's E-mail Address: $perlvar{'lonAdmEMail'}
 ENTER NEW VALUE:
 END
     my $choice2=&lt;&gt;;
     chomp($choice2);
-    $perlvar{'lonRole'}=$choice2;
+    $perlvar{'lonAdmEMail'}=$choice2;
   }
   elsif ($choice==5) {
   print(&lt;&lt;END);
-5) Cache Expiration Time: $perlvar{'lonExpire'}
-ENTER NEW VALUE:
+5) Role: $perlvar{'lonRole'}
+ENTER NEW VALUE (this should be either 'access' or 'library' 
+                 if in doubt select 'library'):
 END
     my $choice2=&lt;&gt;;
     chomp($choice2);
-    $perlvar{'lonExpire'}=$choice2;
+    $perlvar{'lonRole'}=$choice2;
   }
   elsif ($choice==6) {
   print(&lt;&lt;END);
-6) Server Load: $perlvar{'lonLoadLim'}
+6) 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) {
+  print(&lt;&lt;END);
+7) Server Load: $perlvar{'lonLoadLim'}
 ENTER NEW VALUE:
 END
     my $choice2=&lt;&gt;;
     chomp($choice2);
     $perlvar{'lonLoadLim'}=$choice2;
   }
-  elsif ($choice==7) {
+  elsif ($choice==8) {
+  print(&lt;&lt;END);
+8) 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==9) {
+  print(&lt;&lt;END);
+9) 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==10) {
     $flag=1;
   }
   else {
@@ -425,81 +685,134 @@ END
 <target dist='default'>loncom/hosts.tab</target>
 <perlscript mode='fg'>
 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
-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)
-
-END
-# Option number 26 will install rawhide_hosts.tab, but
-# the typical user does not want to be part of an intensive
-# machine test cluster.
-
-# get input
-# if valid then process, otherwise loop
-my $hostname=`hostname`;chomp($hostname);
-my $hostaddress=`hostname -i $hostname`;chomp($hostaddress);
-$flag=0;
-while (!$flag) {
-  print "ENTER 1, 2, 3, or 4:\n";
-  my $choice=&lt;&gt;;
-  chomp($choice);
-  if ($choice==1) {
-    $lonCluster='production';
-    `rm -f ../hosts.tab`;
-    `ln -s production_hosts.tab ../hosts.tab`;
-    $flag=1;
-  }
-  elsif ($choice==2) {
-    $lonCluster='standalone';
-    open(OUT,'&gt;../standalone_hosts.tab') or
-      die("cannot open loncom/standalone_hosts.tab for output\n");
-    print(OUT &lt;&lt;END);
+  my $hostname=`hostname`;chomp($hostname);
+  my $hostaddress=`hostname -i $hostname`;chomp($hostaddress);
+  $hostaddress=~s/\s//;
+  $date=`date -I`; chomp($date);
+  $lonHostID=$perlvar{'lonHostID'};
+  $lonHostID=~s/\W//g;
+  $lineexistflag=0;
+  $hostidexistflag=0;
+  $line2insert=&lt;&lt;END;
 $perlvar{'lonHostID'}:$perlvar{'lonDefDomain'}:$perlvar{'lonRole'}:$hostname:$hostaddress
 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);
-    `rm -f ../hosts.tab`;
-    `ln -s standalone_hosts.tab ../hosts.tab`;
-    $flag=1;
-  }
-  elsif ($choice==3) {
-    $lonCluster='development';
-    `rm -f loncom/hosts.tab`;
-    `ln -s development_hosts.tab ../hosts.tab`;
-    $flag=1;
   }
-  elsif ($choice==4) {
-    $lonCluster='existing';
+  if ($flag==1) {
     `rm -f ../hosts.tab`;
-    `touch existing_hosts.tab`;
-    if (-e '/home/httpd/lonTabs/hosts.tab') {
-      `cp /home/httpd/lonTabs/hosts.tab ../existing_hosts.tab`;
+    open(IN,'&lt;../'.$lonCluster.'_hosts.tab');
+    while(&lt;IN&gt;) {
+      if (/^$line2insert$/) {
+        $lineexistflag=1;
+      }
+      if (/^$lonHostID\:/) {
+        $hostidexistflag=1;
+      }
+    }
+    close(IN);
+    if ($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 ${lonCluster}_hosts.tab is being replaced
+with your new values.
+END
+      `grep -v "$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
+      system('ping -c 1 -W 5 www.lon-capa.org > /dev/null || ping -c 1 -W 5 www.msu.edu > /dev/null || ping -c 1 -W 5 www.mit.edu > /dev/null');
+      `echo "REPLACE:$lonCluster:$lonHostID:$date:$line2insert" | mail -s "REPLACE:$lonCluster:$lonHostID:$date" installrecord\@mail.lon-capa.org` unless $?;
+    }
+    elsif ($hostidexistflag and $lineexistflag) {
+      print &lt;&lt;END;
+Entry exists in ${lonCluster}_hosts.tab.
+END
+      `ln -s ${lonCluster}_hosts.tab ../hosts.tab`;
+      # email appropriate message
+      `echo "STABLEUPDATE:$lonCluster:$lonHostID:$date:$line2insert" | mail -s "STABLEUPDATE:$lonCluster:$lonHostID:$date" installrecord\@mail.lon-capa.org`;
+    }
+    elsif (!$hostidexistflag and !$lineexistflag) {
+      print &lt;&lt;END;
+New entry for $lonCluster.
+END
+      `cat ../${lonCluster}_hosts.tab &gt; ../new_${lonCluster}_hosts.tab`;
+       open(OUT,'&gt;&gt;../new_'.$lonCluster.'_hosts.tab') or
+         die("cannot open loncom/new_${lonCluster}_hosts.tab for output\n");
+         print(OUT $line2insert);
+       close(OUT);
+      `ln -s new_${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`;
     }
-    `ln -s existing_hosts.tab ../hosts.tab`;
-    $flag=1;
-  }
-  elsif ($choice==26) {
-    $lonCluster='rawhide';
-    `rm -f ../hosts.tab`;
-    `ln -s rawhide_hosts.tab ../hosts.tab`;
-    $flag=1;
   }
-  else {
-
+  $lineexistflag=0;
+  if ($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
+      system('ping -c 1 -W 5 www.lon-capa.org > /dev/null || ping -c 1 -W 5 www.msu.edu > /dev/null || ping -c 1 -W 5 www.mit.edu > /dev/null');
+      `echo "REPLACEdom:$lonCluster:$lonHostID:$date:$domaninsert" | mail -s "REPLACEdom:$lonCluster:$lonHostID:$date" installrecord\@mail.lon-capa.org` unless $?;
+    }
+    elsif ($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>
 </files>