--- loncom/lond 2011/06/11 21:10:03 1.475
+++ loncom/lond 2012/04/11 21:32:28 1.490
@@ -2,7 +2,7 @@
# The LearningOnline Network
# lond "LON Daemon" Server (port "LOND" 5663)
#
-# $Id: lond,v 1.475 2011/06/11 21:10:03 raeburn Exp $
+# $Id: lond,v 1.490 2012/04/11 21:32:28 droeschl Exp $
#
# Copyright Michigan State University Board of Trustees
#
@@ -34,6 +34,7 @@ use strict;
use lib '/home/httpd/lib/perl/';
use LONCAPA;
use LONCAPA::Configuration;
+use LONCAPA::Lond;
use IO::Socket;
use IO::File;
@@ -60,7 +61,7 @@ my $DEBUG = 0; # Non zero to ena
my $status='';
my $lastlog='';
-my $VERSION='$Revision: 1.475 $'; #' stupid emacs
+my $VERSION='$Revision: 1.490 $'; #' stupid emacs
my $remoteVERSION;
my $currenthostid="default";
my $currentdomainid;
@@ -92,6 +93,8 @@ my %managers; # Ip -> manager names
my %perlvar; # Will have the apache conf defined perl vars.
+my $dist;
+
#
# The hash below is used for command dispatching, and is therefore keyed on the request keyword.
# Each element of the hash contains a reference to an array that contains:
@@ -1641,6 +1644,74 @@ sub ls3_handler {
}
®ister_handler("ls3", \&ls3_handler, 0, 1, 0);
+sub read_lonnet_global {
+ my ($cmd,$tail,$client) = @_;
+ my $userinput = "$cmd:$tail";
+ my $requested = &Apache::lonnet::thaw_unescape($tail);
+ my $result;
+ my %packagevars = (
+ spareid => \%Apache::lonnet::spareid,
+ perlvar => \%Apache::lonnet::perlvar,
+ );
+ my %limit_to = (
+ perlvar => {
+ lonOtherAuthen => 1,
+ lonBalancer => 1,
+ lonVersion => 1,
+ lonSysEMail => 1,
+ lonHostID => 1,
+ lonRole => 1,
+ lonDefDomain => 1,
+ lonLoadLim => 1,
+ lonUserLoadLim => 1,
+ }
+ );
+ if (ref($requested) eq 'HASH') {
+ foreach my $what (keys(%{$requested})) {
+ my $response;
+ my $items = {};
+ if (exists($packagevars{$what})) {
+ if (ref($limit_to{$what}) eq 'HASH') {
+ foreach my $varname (keys(%{$packagevars{$what}})) {
+ if ($limit_to{$what}{$varname}) {
+ $items->{$varname} = $packagevars{$what}{$varname};
+ }
+ }
+ } else {
+ $items = $packagevars{$what};
+ }
+ if ($what eq 'perlvar') {
+ if (!exists($packagevars{$what}{'lonBalancer'})) {
+ if ($dist =~ /^(centos|rhes|fedora|scientific)/) {
+ my $othervarref=LONCAPA::Configuration::read_conf('httpd.conf');
+ if (ref($othervarref) eq 'HASH') {
+ $items->{'lonBalancer'} = $othervarref->{'lonBalancer'};
+ }
+ }
+ }
+ }
+ $response = &Apache::lonnet::freeze_escape($items);
+ }
+ $result .= &escape($what).'='.$response.'&';
+ }
+ }
+ $result =~ s/\&$//;
+ &Reply($client,\$result,$userinput);
+ return 1;
+}
+®ister_handler("readlonnetglobal", \&read_lonnet_global, 0, 1, 0);
+
+sub server_devalidatecache_handler {
+ my ($cmd,$tail,$client) = @_;
+ my $userinput = "$cmd:$tail";
+ my ($name,$id) = map { &unescape($_); } split(/:/,$tail);
+ &Apache::lonnet::devalidate_cache_new($name,$id);
+ my $result = 'ok';
+ &Reply($client,\$result,$userinput);
+ return 1;
+}
+®ister_handler("devalidatecache", \&server_devalidatecache_handler, 0, 1, 0);
+
sub server_timezone_handler {
my ($cmd,$tail,$client) = @_;
my $userinput = "$cmd:$tail";
@@ -2003,7 +2074,7 @@ sub add_user_handler {
."makeuser";
}
unless ($fperror) {
- my $result=&make_passwd_file($uname, $umode,$npass, $passfilename);
+ my $result=&make_passwd_file($uname,$udom,$umode,$npass, $passfilename);
&Reply($client,\$result, $userinput); #BUGBUG - could be fail
} else {
&Failure($client, \$fperror, $userinput);
@@ -2078,7 +2149,7 @@ sub change_authentication_handler {
&Failure($client, \$result);
}
} else {
- my $result=&make_passwd_file($uname, $umode,$npass,$passfilename);
+ my $result=&make_passwd_file($uname,$udom,$umode,$npass,$passfilename);
#
# If the current auth mode is internal, and the old auth mode was
# unix, or krb*, and the user is an author for this domain,
@@ -2278,7 +2349,10 @@ sub fetch_user_file_handler {
my $destname=$udir.'/'.$ufile;
my $transname=$udir.'/'.$ufile.'.in.transit';
- my $remoteurl='http://'.$clientip.'/userfiles/'.$fname;
+ my $clientprotocol=$Apache::lonnet::protocol{$clientname};
+ $clientprotocol = 'http' if ($clientprotocol ne 'https');
+ my $clienthost = &Apache::lonnet::hostname($clientname);
+ my $remoteurl=$clientprotocol.'://'.$clienthost.'/userfiles/'.$fname;
my $response;
Debug("Remote URL : $remoteurl Transfername $transname Destname: $destname");
alarm(120);
@@ -3172,6 +3246,12 @@ sub dump_profile_database {
# that is matched against
# database keywords to do
# selective dumps.
+# range - optional range of entries
+# e.g., 10-20 would return the
+# 10th to 19th items, etc.
+# extra - optional ref to hash of
+# additional args. currently
+# skipcheck is only key used.
# $client - Channel open on the client.
# Returns:
# 1 - Continue processing.
@@ -3181,6 +3261,15 @@ sub dump_profile_database {
sub dump_with_regexp {
my ($cmd, $tail, $client) = @_;
+ #TODO encapsulate $clientname and $clientversion in a object.
+ my $res = LONCAPA::Lond::dump_with_regexp($cmd, $tail, $clientname, $clientversion);
+
+ if ($res =~ /^error:/) {
+ Failure($client, \$res, "$cmd:$tail");
+ } else {
+ Reply($client, \$res, "$cmd:$tail");
+ }
+ return 1;
my $userinput = "$cmd:$tail";
@@ -3206,12 +3295,26 @@ sub dump_with_regexp {
if ($hashref) {
my $qresult='';
my $count=0;
+#
+# When dump is for roles.db, determine if LON-CAPA version checking is needed.
+# Sessions on 2.10 and later will include skipcheck => 1 in extra args ref,
+# to indicate no version checking is needed (in this case, checking occurs
+# on the server hosting the user session, when constructing the roles/courses
+# screen).
+#
if ($extra ne '') {
$extra = &Apache::lonnet::thaw_unescape($extra);
$skipcheck = $extra->{'skipcheck'};
}
my @ids = &Apache::lonnet::current_machine_ids();
my (%homecourses,$major,$minor,$now);
+#
+# If dump is for roles.db from a pre-2.10 server, determine the LON-CAPA
+# version on the server which requested the data. For LON-CAPA 2.9, the
+# client session will have sent its LON-CAPA version when initiating the
+# connection. For LON-CAPA 2.8 and older, the version is retrieved from
+# the global %loncaparevs in lonnet.pm.
+#
if (($namespace eq 'roles') && (!$skipcheck)) {
my $loncaparev = $clientversion;
if ($loncaparev eq '') {
@@ -3229,8 +3332,18 @@ sub dump_with_regexp {
my $cdom = $1;
my $cnum = $2;
unless ($skipcheck) {
- my ($role,$end,$start) = split(/\_/,$value);
- if (!$end || $end > $now) {
+ my ($role,$roleend,$rolestart) = split(/\_/,$value);
+ if (!$roleend || $roleend > $now) {
+#
+# For active course roles, check that requesting server is running a LON-CAPA
+# version which meets any version requirements for the course. Do not include
+# the role amongst the results returned if the requesting server's version is
+# too old.
+#
+# This determination is handled differently depending on whether the course's
+# homeserver is the current server, or whether it is a different server.
+# In both cases, the course's version requirement needs to be retrieved.
+#
next unless (&releasereqd_check($cnum,$cdom,$key,$value,$major,
$minor,\%homecourses,\@ids));
}
@@ -3253,9 +3366,16 @@ sub dump_with_regexp {
}
}
if (&untie_user_hash($hashref)) {
+#
+# If dump is for roles.db from a pre-2.10 server, check if the LON-CAPA
+# version requirements for courses for which the current server is the home
+# server permit course roles to be usable on the client server hosting the
+# user's session. If so, include those role results in the data returned to
+# the client server.
+#
if (($namespace eq 'roles') && (!$skipcheck)) {
if (keys(%homecourses) > 0) {
- $qresult .= &check_homecourses(\%homecourses,$udom,$regexp,$count,
+ $qresult .= &check_homecourses(\%homecourses,$regexp,$count,
$range,$start,$end,$major,$minor);
}
}
@@ -3925,7 +4045,7 @@ sub dump_course_id_handler {
$creationcontext = '.';
}
my $unpack = 1;
- if ($description eq '.' && $instcodefilter eq '.' && $coursefilter eq '.' &&
+ if ($description eq '.' && $instcodefilter eq '.' && $ownerfilter eq '.' &&
$typefilter eq '.') {
$unpack = 0;
}
@@ -6209,6 +6329,9 @@ sub Debug {
# reply - Text to send to client.
# request - Original request from client.
#
+#NOTE $reply must be terminated by exactly *one* \n. If $reply is a reference
+#this is done automatically ($$reply must not contain any \n in this case).
+#If $reply is a string the caller has to ensure this.
sub Reply {
my ($fd, $reply, $request) = @_;
if (ref($reply)) {
@@ -6362,7 +6485,7 @@ $SIG{USR2} = \&UpdateHosts;
&Apache::lonnet::load_hosts_tab();
my %iphost = &Apache::lonnet::get_iphost(1);
-my $dist=`$perlvar{'lonDaemons'}/distprobe`;
+$dist=`$perlvar{'lonDaemons'}/distprobe`;
my $arch = `uname -i`;
chomp($arch);
@@ -6644,22 +6767,29 @@ sub is_author {
# Author role should show up as a key /domain/_au
- my $key = "/$domain/_au";
my $value;
- if (defined($hashref)) {
- $value = $hashref->{$key};
- }
+ if ($hashref) {
- if(defined($value)) {
- &Debug("$user @ $domain is an author");
+ my $key = "/$domain/_au";
+ if (defined($hashref)) {
+ $value = $hashref->{$key};
+ if(!untie_user_hash($hashref)) {
+ return 'error: ' . ($!+0)." untie (GDBM) Failed";
+ }
+ }
+
+ if(defined($value)) {
+ &Debug("$user @ $domain is an author");
+ }
+ } else {
+ return 'error: '.($!+0)." tie (GDBM) Failed";
}
return defined($value);
}
#
# Checks to see if the input roleput request was to set
-# an author role. If so, invokes the lchtmldir script to set
-# up a correct public_html
+# an author role. If so, creates construction space
# Parameters:
# request - The request sent to the rolesput subchunk.
# We're looking for /domain/_au
@@ -6669,16 +6799,15 @@ sub is_author {
#
sub manage_permissions {
my ($request, $domain, $user, $authtype) = @_;
-
- &Debug("manage_permissions: $request $domain $user $authtype");
-
# See if the request is of the form /$domain/_au
if($request =~ /^(\/\Q$domain\E\/_au)$/) { # It's an author rolesput...
- my $execdir = $perlvar{'lonDaemons'};
- my $userhome= "/home/$user" ;
- &logthis("system $execdir/lchtmldir $userhome $user $authtype");
- &Debug("Setting homedir permissions for $userhome");
- system("$execdir/lchtmldir $userhome $user $authtype");
+ my $path=$perlvar{'lonDocRoot'}."/priv/$domain";
+ unless (-e $path) {
+ mkdir($path);
+ }
+ unless (-e $path.'/'.$user) {
+ mkdir($path.'/'.$user);
+ }
}
}
@@ -7167,7 +7296,9 @@ sub subscribe {
# the metadata
unless ($fname=~/\.meta$/) { &unsub("$fname.meta",$clientip); }
$fname=~s/\/home\/httpd\/html\/res/raw/;
- $fname="http://".&Apache::lonnet::hostname($perlvar{'lonHostID'})."/".$fname;
+ my $protocol = $Apache::lonnet::protocol{$perlvar{'lonHostID'}};
+ $protocol = 'http' if ($protocol ne 'https');
+ $fname=$protocol.'://'.&Apache::lonnet::hostname($perlvar{'lonHostID'})."/".$fname;
$result="$fname\n";
}
} else {
@@ -7209,7 +7340,7 @@ sub change_unix_password {
sub make_passwd_file {
- my ($uname, $umode,$npass,$passfilename)=@_;
+ my ($uname,$udom,$umode,$npass,$passfilename)=@_;
my $result="ok";
if ($umode eq 'krb4' or $umode eq 'krb5') {
{
@@ -7250,7 +7381,7 @@ sub make_passwd_file {
#
my $uid = getpwnam($uname);
if((defined $uid) && ($uid == 0)) {
- &logthis(">>>Attempted to create privilged account blocked");
+ &logthis(">>>Attempt to create privileged account blocked");
return "no_priv_account_error\n";
}
@@ -7262,6 +7393,7 @@ sub make_passwd_file {
&Debug("user = ".$uname.", Password =". $npass);
my $se = IO::File->new("|$execpath > $perlvar{'lonDaemons'}/logs/lcuseradd.log");
print $se "$uname\n";
+ print $se "$udom\n";
print $se "$npass\n";
print $se "$npass\n";
print $se "$lc_error_file\n"; # Status -> unique file.
@@ -7355,6 +7487,20 @@ sub get_usersession_config {
return;
}
+#
+# releasereqd_check() will determine if a LON-CAPA version (defined in the
+# $major,$minor args passed) is not too old to allow use of a role in a
+# course ($cnum,$cdom args passed), if at least one of the following applies:
+# (a) the course is a Community, (b) the course's home server is *not* the
+# current server, or (c) cached course information is not stale.
+#
+# For the case where none of these apply, the course is added to the
+# $homecourse hash ref (keys = courseIDs, values = array of a hash of roles).
+# The $homecourse hash ref is for courses for which the current server is the
+# home server. LON-CAPA version requirements are checked elsewhere for the
+# items in $homecourse.
+#
+
sub releasereqd_check {
my ($cnum,$cdom,$key,$value,$major,$minor,$homecourses,$ids) = @_;
my $home = &Apache::lonnet::homeserver($cnum,$cdom);
@@ -7384,10 +7530,18 @@ sub releasereqd_check {
if (ref($ids) eq 'ARRAY') {
if (grep(/^\Q$home\E$/,@{$ids})) {
if (ref($homecourses) eq 'HASH') {
- if (ref($homecourses->{$hashid}) eq 'ARRAY') {
- push(@{$homecourses->{$hashid}},{$key=>$value});
+ if (ref($homecourses->{$cdom}) eq 'HASH') {
+ if (ref($homecourses->{$cdom}{$cnum}) eq 'HASH') {
+ if (ref($homecourses->{$cdom}{$cnum}) eq 'ARRAY') {
+ push(@{$homecourses->{$cdom}{$cnum}},{$key=>$value});
+ } else {
+ $homecourses->{$cdom}{$cnum} = [{$key=>$value}];
+ }
+ } else {
+ $homecourses->{$cdom}{$cnum} = [{$key=>$value}];
+ }
} else {
- $homecourses->{$hashid} = [{$key=>$value}];
+ $homecourses->{$cdom}{$cnum} = [{$key=>$value}];
}
}
return;
@@ -7406,6 +7560,17 @@ sub releasereqd_check {
return 1;
}
+#
+# get_courseinfo_hash() is used to retrieve course information from the db
+# file: nohist_courseids.db for a course for which the current server is *not*
+# the home server.
+#
+# A hash of a hash will be retrieved. The outer hash contains a single key --
+# courseID -- for the course for which the data are being requested.
+# The contents of the inner hash, for that single item in the outer hash
+# are returned (and cached in memcache for 10 minutes).
+#
+
sub get_courseinfo_hash {
my ($cnum,$cdom,$home) = @_;
my %info;
@@ -7431,43 +7596,64 @@ sub get_courseinfo_hash {
return;
}
+#
+# check_homecourses() will retrieve course information for those courses which
+# are keys of the $homecourses hash ref (first arg). The nohist_courseids.db
+# GDBM file is tied and course information for each course retrieved. Last
+# visit (lasttime key) is also retrieved for each, and cached values updated
+# for any courses last visited less than 24 hours ago. Cached values are also
+# updated for any courses included in the $homecourses hash ref.
+#
+# The reason for the 24 hours constraint is that the cron entry in
+# /etc/cron.d/loncapa for /home/httpd/perl/refresh_courseids_db.pl causes
+# cached course information to be updated nightly for courses with activity
+# within the past 24 hours.
+#
+# Role information for the user (included in a ref to an array of hashes as the
+# value for each key in $homecourses) is appended to the result returned by the
+# routine, which will in turn be appended to the string returned to the client
+# hosting the user's session.
+#
+
sub check_homecourses {
- my ($homecourses,$udom,$regexp,$count,$range,$start,$end,$major,$minor) = @_;
+ my ($homecourses,$regexp,$count,$range,$start,$end,$major,$minor) = @_;
my ($result,%addtocache);
my $yesterday = time - 24*3600;
if (ref($homecourses) eq 'HASH') {
my (%okcourses,%courseinfo,%recent);
- my $hashref = &tie_domain_hash($udom, "nohist_courseids", &GDBM_WRCREAT());
- if ($hashref) {
- while (my ($key,$value) = each(%$hashref)) {
- my $unesc_key = &unescape($key);
- if ($unesc_key =~ /^lasttime:(\w+)$/) {
- my $cid = $1;
- $cid =~ s/_/:/;
- if ($value > $yesterday ) {
- $recent{$cid} = 1;
+ foreach my $domain (keys(%{$homecourses})) {
+ my $hashref =
+ &tie_domain_hash($domain, "nohist_courseids", &GDBM_WRCREAT());
+ if (ref($hashref) eq 'HASH') {
+ while (my ($key,$value) = each(%$hashref)) {
+ my $unesc_key = &unescape($key);
+ if ($unesc_key =~ /^lasttime:(\w+)$/) {
+ my $cid = $1;
+ $cid =~ s/_/:/;
+ if ($value > $yesterday ) {
+ $recent{$cid} = 1;
+ }
+ next;
}
- next;
- }
- my $items = &Apache::lonnet::thaw_unescape($value);
- if (ref($items) eq 'HASH') {
- my $hashid = $unesc_key;
- $hashid =~ s/_/:/;
- $courseinfo{$hashid} = $items;
- if (ref($homecourses->{$hashid}) eq 'ARRAY') {
- my ($reqdmajor,$reqdminor) = split(/\./,$items->{'releaserequired'});
- if (&useable_role($reqdmajor,$reqdminor,$major,$minor)) {
- $okcourses{$hashid} = 1;
+ my $items = &Apache::lonnet::thaw_unescape($value);
+ if (ref($items) eq 'HASH') {
+ my ($cdom,$cnum) = split(/_/,$unesc_key);
+ my $hashid = $cdom.':'.$cnum;
+ $courseinfo{$hashid} = $items;
+ if (ref($homecourses->{$cdom}{$cnum}) eq 'ARRAY') {
+ my ($reqdmajor,$reqdminor) = split(/\./,$items->{'releaserequired'});
+ if (&useable_role($reqdmajor,$reqdminor,$major,$minor)) {
+ $okcourses{$hashid} = 1;
+ }
}
}
}
+ unless (&untie_domain_hash($hashref)) {
+ &logthis("Failed to untie tied hash for nohist_courseids.db for $domain");
+ }
+ } else {
+ &logthis("Failed to tie hash for nohist_courseids.db for $domain");
}
- unless (&untie_domain_hash($hashref)) {
- &logthis('Failed to untie tied hash for nohist_courseids.db');
- }
- } else {
- &logthis('Failed to tie hash for nohist_courseids.db');
- return;
}
foreach my $hashid (keys(%recent)) {
my ($result,$cached)=&Apache::lonnet::is_cached_new('courseinfo',$hashid);
@@ -7475,13 +7661,20 @@ sub check_homecourses {
&Apache::lonnet::do_cache_new('courseinfo',$hashid,$courseinfo{$hashid},600);
}
}
- foreach my $hashid (keys(%{$homecourses})) {
- next if ($recent{$hashid});
- &Apache::lonnet::do_cache_new('courseinfo',$hashid,$courseinfo{$hashid},600);
+ foreach my $cdom (keys(%{$homecourses})) {
+ if (ref($homecourses->{$cdom}) eq 'HASH') {
+ foreach my $cnum (keys(%{$homecourses->{$cdom}})) {
+ my $hashid = $cdom.':'.$cnum;
+ next if ($recent{$hashid});
+ &Apache::lonnet::do_cache_new('courseinfo',$hashid,$courseinfo{$hashid},600);
+ }
+ }
}
foreach my $hashid (keys(%okcourses)) {
- if (ref($homecourses->{$hashid}) eq 'ARRAY') {
- foreach my $role (@{$homecourses->{$hashid}}) {
+ my ($cdom,$cnum) = split(/:/,$hashid);
+ if ((ref($homecourses->{$cdom}) eq 'HASH') &&
+ (ref($homecourses->{$cdom}{$cnum}) eq 'ARRAY')) {
+ foreach my $role (@{$homecourses->{$cdom}{$cnum}}) {
if (ref($role) eq 'HASH') {
while (my ($key,$value) = each(%{$role})) {
if ($regexp eq '.') {
@@ -7507,6 +7700,12 @@ sub check_homecourses {
return $result;
}
+#
+# useable_role() will compare the LON-CAPA version required by a course with
+# the version available on the client server. If the client server's version
+# is compatible, 1 will be returned.
+#
+
sub useable_role {
my ($reqdmajor,$reqdminor,$major,$minor) = @_;
if ($reqdmajor ne '' && $reqdminor ne '') {
@@ -7845,6 +8044,8 @@ Authen::Krb5
=head1 COREQUISITES
+none
+
=head1 OSNAMES
linux
@@ -7932,9 +8133,9 @@ or the CA's certificate in the call to l
<error> is the textual reason this failed. Usual reasons:
=over 2
-
+
=item Apache config file for loncapa incorrect:
-
+
one of the variables
lonCertificateDirectory, lonnetCertificateAuthority, or lonnetCertificate
undefined or incorrect
@@ -8053,7 +8254,7 @@ Could not rewrite the
internal password file for a user
=item Result of password change for <user> : <result>
-
+
A unix password change for <user> was attempted
and the pipe returned <result>
@@ -8082,7 +8283,7 @@ lond has been asked to exit by its clien
client systemand <input> is the full exit command sent to the server.
=item Red CRITICAL: ABNORMAL EXIT. child <pid> for server <hostname> died through a crass with this error->[<message>].
-
+
A lond child terminated. NOte that this termination can also occur when the
child receives the QUIT or DIE signals. <pid> is the process id of the child,
<hostname> the host lond is working for, and <message> the reason the child died
@@ -8166,7 +8367,7 @@ file when sent it's USR1 signal. That p
assumed to be hung in some un-fixable way.
=item Finished checking children
-
+
Master processs's USR1 processing is cojmplete.
=item (Red) CRITICAL: ------- Starting ------
@@ -8180,7 +8381,7 @@ Started a new child process for <client>
connected to the child. This was as a result of a TCP/IP connection from a client.
=item Unable to determine who caller was, getpeername returned nothing
-
+
In child process initialization. either getpeername returned undef or
a zero sized object was returned. Processing continues, but in my opinion,
this should be cause for the child to exit.
@@ -8191,7 +8392,7 @@ In child process initialization. The pe
The client address is stored as "Unavailable" and processing continues.
=item (Yellow) INFO: Connection <ip> <name> connection type = <type>
-
+
In child initialization. A good connectionw as received from <ip>.
=over 2
@@ -8241,7 +8442,7 @@ The client (<client> is the peer's name
negotiated an SSL connection with this child process.
=item (Green) Successful insecure authentication with <client>
-
+
The client has successfully negotiated an insecure connection withthe child process.