--- loncom/lond	2006/05/18 19:57:59	1.330
+++ loncom/lond	2006/05/30 15:39:56	1.331
@@ -2,7 +2,7 @@
 # The LearningOnline Network
 # lond "LON Daemon" Server (port "LOND" 5663)
 #
-# $Id: lond,v 1.330 2006/05/18 19:57:59 albertel Exp $
+# $Id: lond,v 1.331 2006/05/30 15:39:56 www Exp $
 #
 # Copyright Michigan State University Board of Trustees
 #
@@ -58,9 +58,8 @@ my $DEBUG = 0;		       # Non zero to ena
 
 my $status='';
 my $lastlog='';
-my $lond_max_wait_time = 13;
 
-my $VERSION='$Revision: 1.330 $'; #' stupid emacs
+my $VERSION='$Revision: 1.331 $'; #' stupid emacs
 my $remoteVERSION;
 my $currenthostid="default";
 my $currentdomainid;
@@ -940,190 +939,6 @@ sub EditFile {
     return "ok\n";
 }
 
-#---------------------------------------------------------------
-#
-# Manipulation of hash based databases (factoring out common code
-# for later use as we refactor.
-#
-#  Ties a domain level resource file to a hash.
-#  If requested a history entry is created in the associated hist file.
-#
-#  Parameters:
-#     domain    - Name of the domain in which the resource file lives.
-#     namespace - Name of the hash within that domain.
-#     how       - How to tie the hash (e.g. GDBM_WRCREAT()).
-#     loghead   - Optional parameter, if present a log entry is created
-#                 in the associated history file and this is the first part
-#                  of that entry.
-#     logtail   - Goes along with loghead,  The actual logentry is of the
-#                 form $loghead:<timestamp>:logtail.
-# Returns:
-#    Reference to a hash bound to the db file or alternatively undef
-#    if the tie failed.
-#
-sub tie_domain_hash {
-    my ($domain,$namespace,$how,$loghead,$logtail) = @_;
-    
-    # Filter out any whitespace in the domain name:
-    
-    $domain =~ s/\W//g;
-    
-    # We have enough to go on to tie the hash:
-    
-    my $user_top_dir   = $perlvar{'lonUsersDir'};
-    my $domain_dir     = $user_top_dir."/$domain";
-    my $resource_file  = $domain_dir."/$namespace";
-    return &_locking_hash_tie($resource_file,$namespace,$how,$loghead,$logtail);
-}
-
-sub untie_domain_hash {
-    return &_locking_hash_untie(@_);
-}
-#
-#   Ties a user's resource file to a hash.  
-#   If necessary, an appropriate history
-#   log file entry is made as well.
-#   This sub factors out common code from the subs that manipulate
-#   the various gdbm files that keep keyword value pairs.
-# Parameters:
-#   domain       - Name of the domain the user is in.
-#   user         - Name of the 'current user'.
-#   namespace    - Namespace representing the file to tie.
-#   how          - What the tie is done to (e.g. GDBM_WRCREAT().
-#   loghead      - Optional first part of log entry if there may be a
-#                  history file.
-#   what         - Optional tail of log entry if there may be a history
-#                  file.
-# Returns:
-#   hash to which the database is tied.  It's up to the caller to untie.
-#   undef if the has could not be tied.
-#
-sub tie_user_hash {
-    my ($domain,$user,$namespace,$how,$loghead,$what) = @_;
-
-    $namespace=~s/\//\_/g;	# / -> _
-    $namespace=~s/\W//g;		# whitespace eliminated.
-    my $proname     = propath($domain, $user);
-
-    my $file_prefix="$proname/$namespace";
-    return &_locking_hash_tie($file_prefix,$namespace,$how,$loghead,$what);
-}
-
-sub untie_user_hash {
-    return &_locking_hash_untie(@_);
-}
-
-# internal routines that handle the actual tieing and untieing process
-
-sub _do_hash_tie {
-    my ($file_prefix,$namespace,$how,$loghead,$what) = @_;
-    my %hash;
-    if(tie(%hash, 'GDBM_File', "$file_prefix.db", $how, 0640)) {
-	# If this is a namespace for which a history is kept,
-	# make the history log entry:    
-	if (($namespace !~/^nohist\_/) && (defined($loghead))) {
-	    my $args = scalar @_;
-	    Debug(" Opening history: $file_prefix $args");
-	    my $hfh = IO::File->new(">>$file_prefix.hist"); 
-	    if($hfh) {
-		my $now = time;
-		print $hfh "$loghead:$now:$what\n";
-	    }
-	    $hfh->close;
-	}
-	return \%hash;
-    } else {
-	return undef;
-    }
-}
-
-sub _do_hash_untie {
-    my ($hashref) = @_;
-    my $result = untie(%$hashref);
-    return $result;
-}
-
-{
-    my $sym;
-
-    sub _locking_hash_tie {
-	my ($file_prefix,$namespace,$how,$loghead,$what) = @_;
-        my $lock_type=LOCK_SH;
-# Are we reading or writing?
-        if ($how eq &GDBM_READER()) {
-# We are reading
-           if (!open($sym,"$file_prefix.db.lock")) {
-# We don't have a lock file. This could mean
-# - that there is no such db-file
-# - that it does not have a lock file yet
-               if ((! -e "$file_prefix.db") && (! -e "$file_prefix.db.gz")) {
-# No such file. Forget it.                
-                   $! = 2;
-                   return undef;
-               }
-# Apparently just no lock file yet. Make one
-               open($sym,">>$file_prefix.db.lock");
-           }
-# Do a shared lock
-           if (!&flock_sym(LOCK_SH)) { return undef; } 
-# If this is compressed, we will actually need an exclusive lock
-	   if (-e "$file_prefix.db.gz") {
-	       if (!&flock_sym(LOCK_EX)) { return undef; }
-	   }
-        } elsif ($how eq &GDBM_WRCREAT()) {
-# We are writing
-           open($sym,">>$file_prefix.db.lock");
-# Writing needs exclusive lock
-           if (!&flock_sym(LOCK_EX)) { return undef; }
-        } else {
-           &logthis("Unknown method $how for $file_prefix");
-           die();
-        }
-# The file is ours!
-# If it is archived, un-archive it now
-       if (-e "$file_prefix.db.gz") {
-           system("gunzip $file_prefix.db.gz");
-	   if (-e "$file_prefix.hist.gz") {
-	       system("gunzip $file_prefix.hist.gz");
-	   }
-       }
-# Change access mode to non-blocking
-       $how=$how|&GDBM_NOLOCK();
-# Go ahead and tie the hash
-       return &_do_hash_tie($file_prefix,$namespace,$how,$loghead,$what);
-    }
-
-    sub flock_sym {
-        my ($lock_type)=@_;
-	my $failed=0;
-	eval {
-	    local $SIG{__DIE__}='DEFAULT';
-	    local $SIG{ALRM}=sub {
-		$failed=1;
-		die("failed lock");
-	    };
-	    alarm($lond_max_wait_time);
-	    flock($sym,$lock_type);
-	    alarm(0);
-	};
-	if ($failed) {
-	    $! = 100; # throwing error # 100
-	    return undef;
-	} else {
-	    return 1;
-	}
-    }
-
-    sub _locking_hash_untie {
-	my ($hashref) = @_;
-	my $result = untie(%$hashref);
-	flock($sym,LOCK_UN);
-	close($sym);
-	undef($sym);
-	return $result;
-    }
-}
-
 #   read_profile
 #
 #   Returns a set of specific entries from a user's profile file.
@@ -5280,18 +5095,6 @@ sub sub_sql_reply {
     return $answer;
 }
 
-# -------------------------------------------- Return path to profile directory
-
-sub propath {
-    my ($udom,$uname)=@_;
-    $udom=~s/\W//g;
-    $uname=~s/\W//g;
-    my $subdir=$uname.'__';
-    $subdir =~ s/(.)(.)(.).*/$1\/$2\/$3/;
-    my $proname="$perlvar{'lonUsersDir'}/$udom/$subdir/$uname";
-    return $proname;
-} 
-
 # --------------------------------------- Is this the home server of an author?
 
 sub ishome {