--- loncom/lonnet/perl/lonnet.pm	2005/08/31 08:25:16	1.651
+++ loncom/lonnet/perl/lonnet.pm	2005/09/20 07:56:23	1.657
@@ -1,7 +1,7 @@
 # The LearningOnline Network
 # TCP networking package
 #
-# $Id: lonnet.pm,v 1.651 2005/08/31 08:25:16 albertel Exp $
+# $Id: lonnet.pm,v 1.657 2005/09/20 07:56:23 albertel Exp $
 #
 # Copyright Michigan State University Board of Trustees
 #
@@ -767,6 +767,13 @@ sub validate_access_key {
 }
 
 # ------------------------------------- Find the section of student in a course
+sub devalidate_getsection_cache {
+    my ($udom,$unam,$courseid)=@_;
+    $courseid=~s/\_/\//g;
+    $courseid=~s/^(\w)/\/$1/;
+    my $hashid="$udom:$unam:$courseid";
+    &devalidate_cache_new('getsection',$hashid);
+}
 
 sub getsection {
     my ($udom,$unam,$courseid)=@_;
@@ -1636,7 +1643,7 @@ sub courseacclog {
     my $fnsymb=shift;
     unless ($env{'request.course.id'}) { return ''; }
     my $what=$fnsymb.':'.$env{'user.name'}.':'.$env{'user.domain'};
-    if ($fnsymb=~/(problem|exam|quiz|assess|survey|form|page)$/) {
+    if ($fnsymb=~/(problem|exam|quiz|assess|survey|form|task|page)$/) {
         $what.=':POST';
         # FIXME: Probably ought to escape things....
 	foreach (keys %env) {
@@ -1709,7 +1716,11 @@ sub get_course_adv_roles {
 	if ($username eq '' || $domain eq '') { next; }
 	if ((&privileged($username,$domain)) && 
 	    (!$nothide{$username.':'.$domain})) { next; }
+	if ($role eq 'cr') { next; }
         my $key=&plaintext($role);
+	if ($role =~ /^cr/) {
+	    $key=(split('/',$role))[3];
+	}
         if ($section) { $key.=' (Sec/Grp '.$section.')'; }
         if ($returnhash{$key}) {
 	    $returnhash{$key}.=','.$username.':'.$domain;
@@ -2478,8 +2489,12 @@ sub rolesinit {
 	    
             my ($trole,$tend,$tstart);
 	    if ($role=~/^cr/) { 
-		($trole,my $trest)=($role=~m|^(cr/\w+/\w+/[a-zA-Z0-9]+)_(.*)$|);
-		($tend,$tstart)=split('_',$trest);
+		if ($role=~m|^(cr/\w+/\w+/[a-zA-Z0-9]+)_(.*)$|) {
+		    ($trole,my $trest)=($role=~m|^(cr/\w+/\w+/[a-zA-Z0-9]+)_(.*)$|);
+		    ($tend,$tstart)=split('_',$trest);
+		} else {
+		    $trole=$role;
+		}
 	    } else {
 		($trole,$tend,$tstart)=split(/_/,$role);
 	    }
@@ -3767,6 +3782,8 @@ sub modify_student_enrollment {
 		   $cdom,$cnum);
     unless (($reply eq 'ok') || ($reply eq 'delayed')) {
 	return 'error: '.$reply;
+    } else {
+	&devalidate_getsection_cache($udom,$uname,$cid);
     }
     # Add student role to user
     my $uurl='/'.$cid;
@@ -5887,14 +5904,21 @@ BEGIN {
 
 sub get_iphost {
     if (%iphost) { return %iphost; }
+    my %name_to_ip;
     foreach my $id (keys(%hostname)) {
 	my $name=$hostname{$id};
-	my $ip = gethostbyname($name);
-	if (!$ip || length($ip) ne 4) {
-	    &logthis("Skipping host $id name $name no IP found\n");
-	    next;
+	my $ip;
+	if (!exists($name_to_ip{$name})) {
+	    $ip = gethostbyname($name);
+	    if (!$ip || length($ip) ne 4) {
+		&logthis("Skipping host $id name $name no IP found\n");
+		next;
+	    }
+	    $ip=inet_ntoa($ip);
+	    $name_to_ip{$name} = $ip;
+	} else {
+	    $ip = $name_to_ip{$name};
 	}
-	$ip=inet_ntoa($ip);
 	push(@{$iphost{$ip}},$id);
     }
     return %iphost;