--- loncom/lonr	2009/04/18 23:43:47	1.5
+++ loncom/lonr	2014/11/16 15:35:27	1.10
@@ -3,7 +3,7 @@
 # The LearningOnline Network with CAPA
 # Connect to R CAS
 #
-# $Id: lonr,v 1.5 2009/04/18 23:43:47 www Exp $
+# $Id: lonr,v 1.10 2014/11/16 15:35:27 raeburn Exp $
 #
 # Copyright Michigan State University Board of Trustees
 #
@@ -275,9 +275,9 @@ sub make_new_child {
             &status('Accepting connections');
             my $client = $server->accept()     or last;
             &sync($command);
-#            print $command ("display2d:false;simp:true;kill(all);\n");
-#	    &getroutput($command,2);
-#            &sync($command);
+            print $command ("library(phpSerialize);\n");
+	    &getroutput($command);
+            &sync($command);
             my $syntaxerr = 0;
             while (my $cmd=<$client>) {
                 &status('Processing command');
@@ -316,11 +316,16 @@ sub make_new_child {
     sub sync {
 	my ($command)=@_;
 	$counter++;
+        my $digits = length($counter);
+        if ($digits > 10) {
+            $counter = 1;
+        }
 	my $expect=$counter;
-	print $command "$expect;\n";
+	print $command "print($expect,digits=$digits);\n";
 	while (1) {
 	    my $output=&getroutput($command);
-	    if (($output=~/\Q$expect\E/) || ($output=~/^Error\:/)) {
+            chomp($output);
+	    if (($output=~/^\Q$expect\E/) || ($output=~/^Error\:/)) {
 		return;
 	    }
 	}
@@ -329,7 +334,7 @@ sub make_new_child {
 
 sub getroutput {
     my ($command)=@_;
-    my $regexp = '>';
+    my $regexp = '>\s+$';
     my $syntaxerr=0;
     my $timeout = 20;
     my (undef,$error,$matched,$output) =
@@ -346,13 +351,12 @@ sub getroutput {
 	return 'Error: '.$error;
     }
 
-    my $foundoutput=0;
-    my $found_label=0;
     my $realoutput='';
     foreach my $line (split(/\n/,$output)) {
-       $line=~s/\s$//gs;
-       if ($line=~/^Error\:/) { $syntaxerr=1; next; }
-       if (my ($result)=($line=~/^\[?\d+\,*\]?\s*(.*)/)) { $realoutput.=$result."\n"; }
+        $line=~s/\s$//gs;
+        if ($line=~/^Error\:/) { $syntaxerr=1; next; }
+        if ($line=~ /\;$/) { next; }
+        if (my ($result)=($line=~/^\s*\[?\d+\,?\]?\s*(.*)/)) { $realoutput.=$result."\n"; }
     }
     if (wantarray) {
         return ($realoutput,$syntaxerr);