Diff for /loncom/lond between versions 1.398 and 1.525

version 1.398, 2008/03/08 03:17:38 version 1.525, 2016/09/12 20:20:44
Line 33  use strict; Line 33  use strict;
 use lib '/home/httpd/lib/perl/';  use lib '/home/httpd/lib/perl/';
 use LONCAPA;  use LONCAPA;
 use LONCAPA::Configuration;  use LONCAPA::Configuration;
   use LONCAPA::Lond;
   
 use IO::Socket;  use IO::Socket;
 use IO::File;  use IO::File;
 #use Apache::File;  #use Apache::File;
 use POSIX;  use POSIX;
 use Crypt::IDEA;  use Crypt::IDEA;
 use LWP::UserAgent();  use HTTP::Request;
 use Digest::MD5 qw(md5_hex);  use Digest::MD5 qw(md5_hex);
 use GDBM_File;  use GDBM_File;
 use Authen::Krb4;  
 use Authen::Krb5;  use Authen::Krb5;
 use localauth;  use localauth;
 use localenroll;  use localenroll;
Line 53  use LONCAPA::lonlocal; Line 53  use LONCAPA::lonlocal;
 use LONCAPA::lonssl;  use LONCAPA::lonssl;
 use Fcntl qw(:flock);  use Fcntl qw(:flock);
 use Apache::lonnet;  use Apache::lonnet;
   use Mail::Send;
   use Crypt::Eksblowfish::Bcrypt;
   use Digest::SHA;
   use Encode;
   use LONCAPA::LWPReq;
   
 my $DEBUG = 0;       # Non zero to enable debug log entries.  my $DEBUG = 0;       # Non zero to enable debug log entries.
   
Line 67  my $currentdomainid; Line 72  my $currentdomainid;
 my $client;  my $client;
 my $clientip; # IP address of client.  my $clientip; # IP address of client.
 my $clientname; # LonCAPA name of client.  my $clientname; # LonCAPA name of client.
   my $clientversion;              # LonCAPA version running on client.
   my $clienthomedom;              # LonCAPA domain of homeID for client. 
   my $clientintdom;               # LonCAPA "internet domain" for client.
   my $clientsameinst;             # LonCAPA "internet domain" same for 
                                   # this host and client.
   my $clientremoteok;             # Client allowed to host domain's users.
                                   # (version constraints ignored), not set
                                   # if this host and client share "internet domain". 
   my %clientprohibited;           # Actions prohibited on client;
    
 my $server;  my $server;
   
 my $keymode;  my $keymode;
Line 88  my %managers;   # Ip -> manager names Line 102  my %managers;   # Ip -> manager names
   
 my %perlvar; # Will have the apache conf defined perl vars.  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.  #   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:  #    Each element of the hash contains a reference to an array that contains:
Line 123  my @passwderrors = ("ok", Line 139  my @passwderrors = ("ok",
    "pwchange_failure - lcpasswd Error filename is invalid");     "pwchange_failure - lcpasswd Error filename is invalid");
   
   
 #  The array below are lcuseradd error strings.:  # This array are the errors from lcinstallfile:
   
 my $lastadderror = 13;  
 my @adderrors    = ("ok",  
     "User ID mismatch, lcuseradd must run as user www",  
     "lcuseradd Incorrect number of command line parameters must be 3",  
     "lcuseradd Incorrect number of stdinput lines, must be 3",  
     "lcuseradd Too many other simultaneous pwd changes in progress",  
     "lcuseradd User does not exist",  
     "lcuseradd Unable to make www member of users's group",  
     "lcuseradd Unable to su to root",  
     "lcuseradd Unable to set password",  
     "lcuseradd Username has invalid characters",  
     "lcuseradd Password has an invalid character",  
     "lcuseradd User already exists",  
     "lcuseradd Could not add user.",  
     "lcuseradd Password mismatch");  
   
   
   my @installerrors = ("ok",
        "Initial user id of client not that of www",
        "Usage error, not enough command line arguments",
        "Source filename does not exist",
        "Destination filename does not exist",
        "Some file operation failed",
        "Invalid table filename."
        );
   
   #
   # The %trust hash classifies commands according to type of trust 
   # required for execution of the command.
   #
   # When clients from a different institution request execution of a
   # particular command, the trust settings for that institution set
   # for this domain (or default domain for a multi-domain server) will
   # be checked to see if running the command is allowed.
   #
   # Trust types which depend on the "Trust" domain configuration
   # for the machine's default domain are:
   #
   # content   ("Access to this domain's content by others")
   # shared    ("Access to other domain's content by this domain")
   # enroll    ("Enrollment in this domain's courses by others")
   # coaurem   ("Co-author roles for this domain's users elsewhere")
   # domroles  ("Domain roles in this domain assignable to others")
   # catalog   ("Course Catalog for this domain displayed elsewhere")
   # reqcrs    ("Requests for creation of courses in this domain by others")
   # msg       ("Users in other domains can send messages to this domain")
   # 
   # Trust type which depends on the User Session Hosting (remote) 
   # domain configuration for machine's default domain is: "remote".
   #
   # Trust types which depend on contents of manager.tab in 
   # /home/httpd/lonTabs is: "manageronly".
   # 
   # Trust type which requires client to share the same LON-CAPA
   # "internet domain" (i.e., same institution as this server) is:
   # "institutiononly".
   #
   
   my %trust = (
                  auth => {remote => 1},
                  autocreatepassword => {remote => 1},
                  autocrsreqchecks => {remote => 1, reqcrs => 1},
                  autocrsrequpdate => {remote => 1},
                  autocrsreqvalidation => {remote => 1},
                  autogetsections => {remote => 1},
                  autoinstcodedefaults => {remote => 1, catalog => 1},
                  autoinstcodeformat => {remote => 1, catalog => 1},
                  autonewcourse => {remote => 1, reqcrs => 1},
                  autophotocheck => {remote => 1, enroll => 1},
                  autophotochoice => {remote => 1},
                  autophotopermission => {remote => 1, enroll => 1},
                  autopossibleinstcodes => {remote => 1, reqcrs => 1},
                  autoretrieve => {remote => 1, enroll => 1, catalog => 1},
                  autorun => {remote => 1, enroll => 1, reqcrs => 1},
                  autovalidateclass_sec => {catalog => 1},
                  autovalidatecourse => {remote => 1, enroll => 1},
                  autovalidateinstcode => {domroles => 1, remote => 1, enroll => 1},
                  changeuserauth => {remote => 1, domroles => 1},
                  chatretr => {remote => 1, enroll => 1},
                  chatsend => {remote => 1, enroll => 1},
                  courseiddump => {remote => 1, domroles => 1, enroll => 1},
                  courseidput => {remote => 1, domroles => 1, enroll => 1},
                  courseidputhash => {remote => 1, domroles => 1, enroll => 1},
                  courselastaccess => {remote => 1, domroles => 1, enroll => 1},
                  currentauth => {remote => 1, domroles => 1, enroll => 1},
                  currentdump => {remote => 1, enroll => 1},
                  currentversion => {remote=> 1, content => 1},
                  dcmaildump => {remote => 1, domroles => 1},
                  dcmailput => {remote => 1, domroles => 1},
                  del => {remote => 1, domroles => 1, enroll => 1, content => 1},
                  deldom => {remote => 1, domroles => 1}, # not currently used
                  devalidatecache => {institutiononly => 1},
                  domroleput => {remote => 1, enroll => 1},
                  domrolesdump => {remote => 1, catalog => 1},
                  du => {remote => 1, enroll => 1},
                  du2 => {remote => 1, enroll => 1},
                  dump => {remote => 1, enroll => 1, domroles => 1},
                  edit => {institutiononly => 1},  #not used currently
                  eget => {remote => 1, domroles => 1, enroll => 1}, #not used currently
                  ekey => {}, #not used currently
                  exit => {anywhere => 1},
                  fetchuserfile => {remote => 1, enroll => 1},
                  get => {remote => 1, domroles => 1, enroll => 1},
                  getdom => {anywhere => 1},
                  home => {anywhere => 1},
                  iddel => {remote => 1, enroll => 1},
                  idget => {remote => 1, enroll => 1},
                  idput => {remote => 1, domroles => 1, enroll => 1},
                  inc => {remote => 1, enroll => 1},
                  init => {anywhere => 1},
                  inst_usertypes => {remote => 1, domroles => 1, enroll => 1},
                  instemailrules => {remote => 1, domroles => 1},
                  instidrulecheck => {remote => 1, domroles => 1,},
                  instidrules => {remote => 1, domroles => 1,},
                  instrulecheck => {remote => 1, enroll => 1, reqcrs => 1, domroles => 1},
                  instselfcreatecheck => {institutiononly => 1},
                  instuserrules => {remote => 1, enroll => 1, reqcrs => 1, domroles => 1},
                  keys => {remote => 1,},
                  load => {anywhere => 1},
                  log => {anywhere => 1},
                  ls => {remote => 1, enroll => 1, content => 1,},
                  ls2 => {remote => 1, enroll => 1, content => 1,},
                  ls3 => {remote => 1, enroll => 1, content => 1,},
                  makeuser => {remote => 1, enroll => 1, domroles => 1,},
                  mkdiruserfile => {remote => 1, enroll => 1,},
                  newput => {remote => 1, enroll => 1, reqcrs => 1, domroles => 1,},
                  passwd => {remote => 1},
                  ping => {anywhere => 1},
                  pong => {anywhere => 1},
                  pushfile => {manageronly => 1},
                  put => {remote => 1, enroll => 1, domroles => 1, msg => 1, content => 1, shared => 1},
                  putdom => {remote => 1, domroles => 1,},
                  putstore => {remote => 1, enroll => 1},
                  queryreply => {anywhere => 1},
                  querysend => {anywhere => 1},
                  quit => {anywhere => 1},
                  readlonnetglobal => {institutiononly => 1},
                  reinit => {manageronly => 1}, #not used currently
                  removeuserfile => {remote => 1, enroll => 1},
                  renameuserfile => {remote => 1,},
                  restore => {remote => 1, enroll => 1, reqcrs => 1,},
                  rolesdel => {remote => 1, enroll => 1, domroles => 1, coaurem => 1},
                  rolesput => {remote => 1, enroll => 1, domroles => 1, coaurem => 1},
                  serverdistarch => {manageronly => 1},
                  serverhomeID => {anywhere => 1},
                  serverloncaparev => {anywhere => 1},
                  servertimezone => {remote => 1, enroll => 1},
                  setannounce => {remote => 1, domroles => 1},
                  sethost => {anywhere => 1},
                  store => {remote => 1, enroll => 1, reqcrs => 1,},
                  studentphoto => {remote => 1, enroll => 1},
                  sub => {content => 1,},
                  tmpdel => {anywhere => 1},
                  tmpget => {anywhere => 1},
                  tmpput => {anywhere => 1},
                  tokenauthuserfile => {anywhere => 1},
                  unsub => {content => 1,},
                  update => {shared => 1},
                  updateclickers => {remote => 1},
                  userhassession => {anywhere => 1},
                  userload => {anywhere => 1},
                  version => {anywhere => 1}, #not used
               );
   
 #  #
 #   Statistics that are maintained and dislayed in the status line.  #   Statistics that are maintained and dislayed in the status line.
Line 398  sub isClient { Line 543  sub isClient {
 #  #
 sub ReadManagerTable {  sub ReadManagerTable {
   
       &Debug("Reading manager table");
     #   Clean out the old table first..      #   Clean out the old table first..
   
    foreach my $key (keys %managers) {     foreach my $key (keys %managers) {
Line 406  sub ReadManagerTable { Line 552  sub ReadManagerTable {
   
    my $tablename = $perlvar{'lonTabDir'}."/managers.tab";     my $tablename = $perlvar{'lonTabDir'}."/managers.tab";
    if (!open (MANAGERS, $tablename)) {     if (!open (MANAGERS, $tablename)) {
       logthis('<font color="red">No manager table.  Nobody can manage!!</font>');         my $hostname = &Apache::lonnet::hostname($perlvar{'lonHostID'});
       return;         if (&Apache::lonnet::is_LC_dns($hostname)) {
              &logthis('<font color="red">No manager table.  Nobody can manage!!</font>');
          }
          return;
    }     }
    while(my $host = <MANAGERS>) {     while(my $host = <MANAGERS>) {
       chomp($host);        chomp($host);
Line 432  sub ReadManagerTable { Line 581  sub ReadManagerTable {
          }           }
       } else {        } else {
          logthis('<font color="green"> existing host'." $host</font>\n");           logthis('<font color="green"> existing host'." $host</font>\n");
          $managers{&Apache::lonnet::get_host_ip($host)} = $host;  # Use info from cluster tab if clumemeber           $managers{&Apache::lonnet::get_host_ip($host)} = $host;  # Use info from cluster tab if cluster memeber
       }        }
    }     }
 }  }
Line 494  sub AdjustHostContents { Line 643  sub AdjustHostContents {
     my $me        = $perlvar{'lonHostID'};      my $me        = $perlvar{'lonHostID'};
   
     foreach my $line (split(/\n/,$contents)) {      foreach my $line (split(/\n/,$contents)) {
  if(!(($line eq "") || ($line =~ /^ *\#/) || ($line =~ /^ *$/))) {   if(!(($line eq "") || ($line =~ /^ *\#/) || ($line =~ /^ *$/) ||
                ($line =~ /^\s*\^/))) {
     chomp($line);      chomp($line);
     my ($id,$domain,$role,$name,$ip,$maxcon,$idleto,$mincon)=split(/:/,$line);      my ($id,$domain,$role,$name,$ip,$maxcon,$idleto,$mincon)=split(/:/,$line);
     if ($id eq $me) {      if ($id eq $me) {
Line 520  sub AdjustHostContents { Line 670  sub AdjustHostContents {
 }  }
 #  #
 #   InstallFile: Called to install an administrative file:  #   InstallFile: Called to install an administrative file:
 #       - The file is created with <name>.tmp  #       - The file is created int a temp directory called <name>.tmp
 #       - The <name>.tmp file is then mv'd to <name>  #       - lcinstall file is called to install the file.
 #   This lugubrious procedure is done to ensure that we are never without  #         since the web app has no direct write access to the table directory
 #   a valid, even if dated, version of the file regardless of who crashes  
 #   and when the crash occurs.  
 #  #
 #  Parameters:  #  Parameters:
 #       Name of the file  #       Name of the file
Line 532  sub AdjustHostContents { Line 680  sub AdjustHostContents {
 #  Return:  #  Return:
 #      nonzero - success.  #      nonzero - success.
 #      0       - failure and $! has an errno.  #      0       - failure and $! has an errno.
   # Assumptions:
   #    File installtion is a relatively infrequent
 #  #
 sub InstallFile {  sub InstallFile {
   
     my ($Filename, $Contents) = @_;      my ($Filename, $Contents) = @_;
     my $TempFile = $Filename.".tmp";  #     my $TempFile = $Filename.".tmp";
       my $exedir = $perlvar{'lonDaemons'};
       my $tmpdir = $exedir.'/tmp/';
       my $TempFile = $tmpdir."TempTableFile.tmp";
   
     #  Open the file for write:      #  Open the file for write:
   
Line 550  sub InstallFile { Line 703  sub InstallFile {
     print $fh ($Contents);       print $fh ($Contents); 
     $fh->close; # In case we ever have a filesystem w. locking      $fh->close; # In case we ever have a filesystem w. locking
   
     chmod(0660, $TempFile);      chmod(0664, $TempFile); # Everyone can write it.
   
     # Now we can move install the file in position.      # Use lcinstall file to put the file in the table directory...
       
     move($TempFile, $Filename);      &Debug("Opening pipe to $exedir/lcinstallfile $TempFile $Filename");
       my $pf = IO::File->new("| $exedir/lcinstallfile   $TempFile $Filename > $exedir/logs/lcinstallfile.log");
       close $pf;
       my $err = $?;
       &Debug("Status is $err");
       if ($err != 0) {
    my $msg = $err;
    if ($err < @installerrors) {
       $msg = $installerrors[$err];
    }
    &logthis("Install failed for table file $Filename : $msg");
    return 0;
       }
   
       # Remove the temp file:
   
       unlink($TempFile);
   
     return 1;      return 1;
 }  }
Line 562  sub InstallFile { Line 731  sub InstallFile {
   
 #  #
 #   ConfigFileFromSelector: converts a configuration file selector  #   ConfigFileFromSelector: converts a configuration file selector
 #                 (one of host or domain at this point) into a   #                 into a configuration file pathname.
 #                 configuration file pathname.  #                 Supports the following file selectors: 
   #                 hosts, domain, dns_hosts, dns_domain  
   #
 #  #
 #  Parameters:  #  Parameters:
 #      selector  - Configuration file selector.  #      selector  - Configuration file selector.
Line 575  sub ConfigFileFromSelector { Line 746  sub ConfigFileFromSelector {
     my $tablefile;      my $tablefile;
   
     my $tabledir = $perlvar{'lonTabDir'}.'/';      my $tabledir = $perlvar{'lonTabDir'}.'/';
     if ($selector eq "hosts") {      if (($selector eq "hosts") || ($selector eq "domain") || 
  $tablefile = $tabledir."hosts.tab";          ($selector eq "dns_hosts") || ($selector eq "dns_domain")) {
     } elsif ($selector eq "domain") {   $tablefile =  $tabledir.$selector.'.tab';
  $tablefile = $tabledir."domain.tab";  
     } else {  
  return undef;  
     }      }
     return $tablefile;      return $tablefile;
   
 }  }
 #  #
 #   PushFile:  Called to do an administrative push of a file.  #   PushFile:  Called to do an administrative push of a file.
Line 601  sub ConfigFileFromSelector { Line 768  sub ConfigFileFromSelector {
 #     String to send to client ("ok" or "refused" if bad file).  #     String to send to client ("ok" or "refused" if bad file).
 #  #
 sub PushFile {  sub PushFile {
     my $request = shift;          my $request = shift;
     my ($command, $filename, $contents) = split(":", $request, 3);      my ($command, $filename, $contents) = split(":", $request, 3);
       &Debug("PushFile");
           
     #  At this point in time, pushes for only the following tables are      #  At this point in time, pushes for only the following tables are
     #  supported:      #  supported:
     #   hosts.tab  ($filename eq host).      #   hosts.tab  ($filename eq host).
     #   domain.tab ($filename eq domain).      #   domain.tab ($filename eq domain).
       #   dns_hosts.tab ($filename eq dns_host).
       #   dns_domain.tab ($filename eq dns_domain). 
     # Construct the destination filename or reject the request.      # Construct the destination filename or reject the request.
     #      #
     # lonManage is supposed to ensure this, however this session could be      # lonManage is supposed to ensure this, however this session could be
Line 619  sub PushFile { Line 789  sub PushFile {
     if(! (defined $tablefile)) {      if(! (defined $tablefile)) {
  return "refused";   return "refused";
     }      }
     #  
     # >copy< the old table to the backup table  
     #        don't rename in case system crashes/reboots etc. in the time  
     #        window between a rename and write.  
     #  
     my $backupfile = $tablefile;  
     $backupfile    =~ s/\.tab$/.old/;  
     if(!CopyFile($tablefile, $backupfile)) {  
  &logthis('<font color="green"> CopyFile from '.$tablefile." to ".$backupfile." failed </font>");  
  return "error:$!";  
     }  
     &logthis('<font color="green"> Pushfile: backed up '  
     .$tablefile." to $backupfile</font>");  
       
     #  If the file being pushed is the host file, we adjust the entry for ourself so that the      #  If the file being pushed is the host file, we adjust the entry for ourself so that the
     #  IP will be our current IP as looked up in dns.  Note this is only 99% good as it's possible      #  IP will be our current IP as looked up in dns.  Note this is only 99% good as it's possible
     #  to conceive of conditions where we don't have a DNS entry locally.  This is possible in a       #  to conceive of conditions where we don't have a DNS entry locally.  This is possible in a 
Line 641  sub PushFile { Line 798  sub PushFile {
   
     if($filename eq "host") {      if($filename eq "host") {
  $contents = AdjustHostContents($contents);   $contents = AdjustHostContents($contents);
       } elsif ($filename eq 'dns_host' || $filename eq 'dns_domain') {
           if ($contents eq '') {
               &logthis('<font color="red"> Pushfile: unable to install '
                       .$tablefile." - no data received from push. </font>");
               return 'error: push had no data';
           }
           if (&Apache::lonnet::get_host_ip($clientname)) {
               my $clienthost = &Apache::lonnet::hostname($clientname);
               if ($managers{$clientip} eq $clientname) {
                   my $clientprotocol = $Apache::lonnet::protocol{$clientname};
                   $clientprotocol = 'http' if ($clientprotocol ne 'https');
                   my $url = '/adm/'.$filename;
                   $url =~ s{_}{/};
                   my $request=new HTTP::Request('GET',"$clientprotocol://$clienthost$url");
                   my $response = LONCAPA::LWPReq::makerequest($clientname,$request,'',\%perlvar,60,0);
                   if ($response->is_error()) {
                       &logthis('<font color="red"> Pushfile: unable to install '
                               .$tablefile." - error attempting to pull data. </font>");
                       return 'error: pull failed';
                   } else {
                       my $result = $response->content;
                       chomp($result);
                       unless ($result eq $contents) {
                           &logthis('<font color="red"> Pushfile: unable to install '
                                   .$tablefile." - pushed data and pulled data differ. </font>");
                           my $pushleng = length($contents);
                           my $pullleng = length($result);
                           if ($pushleng != $pullleng) {
                               return "error: $pushleng vs $pullleng bytes";
                           } else {
                               return "error: mismatch push and pull";
                           }
                       }
                   }
               }
           }
     }      }
   
     #  Install the new file:      #  Install the new file:
   
       &logthis("Installing new $tablefile contents:\n$contents");
     if(!InstallFile($tablefile, $contents)) {      if(!InstallFile($tablefile, $contents)) {
  &logthis('<font color="red"> Pushfile: unable to install '   &logthis('<font color="red"> Pushfile: unable to install '
  .$tablefile." $! </font>");   .$tablefile." $! </font>");
  return "error:$!";   return "error:$!";
     } else {      } else {
  &logthis('<font color="green"> Installed new '.$tablefile   &logthis('<font color="green"> Installed new '.$tablefile
  ."</font>");   ." - transaction by: $clientname ($clientip)</font>");
           my $adminmail = $perlvar{'lonAdmEMail'};
           my $admindom = &Apache::lonnet::host_domain($perlvar{'lonHostID'});
           if ($admindom ne '') {
               my %domconfig =
                   &Apache::lonnet::get_dom('configuration',['contacts'],$admindom);
               if (ref($domconfig{'contacts'}) eq 'HASH') {
                   if ($domconfig{'contacts'}{'adminemail'} ne '') {
                       $adminmail = $domconfig{'contacts'}{'adminemail'};
                   }
               }
           }
           if ($adminmail =~ /^[^\@]+\@[^\@]+$/) {
               my $msg = new Mail::Send;
               $msg->to($adminmail);
               $msg->subject('LON-CAPA DNS update on '.$perlvar{'lonHostID'});
               $msg->add('Content-type','text/plain; charset=UTF-8');
               if (my $fh = $msg->open()) {
                   print $fh 'Update to '.$tablefile.' from Cluster Manager '.
                             "$clientname ($clientip)\n";
                   $fh->close;
               }
           }
     }      }
   
   
     #  Indicate success:      #  Indicate success:
     
     return "ok";      return "ok";
Line 951  sub read_profile { Line 1165  sub read_profile {
  &GDBM_READER());   &GDBM_READER());
     if ($hashref) {      if ($hashref) {
         my @queries=split(/\&/,$what);          my @queries=split(/\&/,$what);
           if ($namespace eq 'roles') {
               @queries = map { &unescape($_); } @queries; 
           }
         my $qresult='';          my $qresult='';
   
  for (my $i=0;$i<=$#queries;$i++) {   for (my $i=0;$i<=$#queries;$i++) {
Line 1044  sub pong_handler { Line 1261  sub pong_handler {
 #  Implicit Inputs:  #  Implicit Inputs:
 #      $currenthostid - Global variable that carries the name of the host  #      $currenthostid - Global variable that carries the name of the host
 #                       known as.  #                       known as.
 #      $clientname    - Global variable that carries the name of the hsot we're connected to.  #      $clientname    - Global variable that carries the name of the host we're connected to.
 #  Returns:  #  Returns:
 #      1       - Ok to continue processing.  #      1       - Ok to continue processing.
 #      0       - Program should exit.  #      0       - Program should exit.
Line 1083  sub establish_key_handler { Line 1300  sub establish_key_handler {
 #  Implicit Inputs:  #  Implicit Inputs:
 #      $currenthostid - Global variable that carries the name of the host  #      $currenthostid - Global variable that carries the name of the host
 #                       known as.  #                       known as.
 #      $clientname    - Global variable that carries the name of the hsot we're connected to.  #      $clientname    - Global variable that carries the name of the host we're connected to.
 #  Returns:  #  Returns:
 #      1       - Ok to continue processing.  #      1       - Ok to continue processing.
 #      0       - Program should exit.  #      0       - Program should exit.
Line 1092  sub establish_key_handler { Line 1309  sub establish_key_handler {
 sub load_handler {  sub load_handler {
     my ($cmd, $tail, $replyfd) = @_;      my ($cmd, $tail, $replyfd) = @_;
   
   
   
    # Get the load average from /proc/loadavg and calculate it as a percentage of     # Get the load average from /proc/loadavg and calculate it as a percentage of
    # the allowed load limit as set by the perl global variable lonLoadLim     # the allowed load limit as set by the perl global variable lonLoadLim
   
Line 1120  sub load_handler { Line 1339  sub load_handler {
 #  Implicit Inputs:  #  Implicit Inputs:
 #      $currenthostid - Global variable that carries the name of the host  #      $currenthostid - Global variable that carries the name of the host
 #                       known as.  #                       known as.
 #      $clientname    - Global variable that carries the name of the hsot we're connected to.  #      $clientname    - Global variable that carries the name of the host we're connected to.
 #  Returns:  #  Returns:
 #      1       - Ok to continue processing.  #      1       - Ok to continue processing.
 #      0       - Program should exit  #      0       - Program should exit
Line 1198  sub user_authorization_type { Line 1417  sub user_authorization_type {
 #    a reply is written to the client.  #    a reply is written to the client.
 sub push_file_handler {  sub push_file_handler {
     my ($cmd, $tail, $client) = @_;      my ($cmd, $tail, $client) = @_;
       &Debug("In push file handler");
     my $userinput = "$cmd:$tail";      my $userinput = "$cmd:$tail";
   
     # At this time we only know that the IP of our partner is a valid manager      # At this time we only know that the IP of our partner is a valid manager
Line 1206  sub push_file_handler { Line 1425  sub push_file_handler {
     # spoofing).      # spoofing).
   
     my $cert = &GetCertificate($userinput);      my $cert = &GetCertificate($userinput);
     if(&ValidManager($cert)) {       if(&ValidManager($cert)) {
    &Debug("Valid manager: $client");
   
  # Now presumably we have the bona fides of both the peer host and the   # Now presumably we have the bona fides of both the peer host and the
  # process making the request.   # process making the request.
Line 1215  sub push_file_handler { Line 1435  sub push_file_handler {
  &Reply($client, \$reply, $userinput);   &Reply($client, \$reply, $userinput);
   
     } else {      } else {
    &logthis("push_file_handler $client is not valid");
  &Failure( $client, "refused\n", $userinput);   &Failure( $client, "refused\n", $userinput);
     }       } 
     return 1;      return 1;
 }  }
 &register_handler("pushfile", \&push_file_handler, 1, 0, 1);  &register_handler("pushfile", \&push_file_handler, 1, 0, 1);
   
   # The du_handler routine should be considered obsolete and is retained
   # for communication with legacy servers.  Please see the du2_handler.
 #  #
 #   du  - list the disk usuage of a directory recursively.   #   du  - list the disk usage of a directory recursively. 
 #      #    
 #   note: stolen code from the ls file handler  #   note: stolen code from the ls file handler
 #   under construction by Rick Banghart   #   under construction by Rick Banghart 
Line 1272  sub du_handler { Line 1495  sub du_handler {
 }  }
 &register_handler("du", \&du_handler, 0, 1, 0);  &register_handler("du", \&du_handler, 0, 1, 0);
   
   # Please also see the du_handler, which is obsoleted by du2. 
   # du2_handler differs from du_handler in that required path to directory
   # provided by &propath() is prepended in the handler instead of on the 
   # client side.
   #
   #   du2  - list the disk usage of a directory recursively.
   #
   # Parameters:
   #    $cmd        - The command that dispatched us (du).
   #    $tail       - The tail of the request that invoked us.
   #                  $tail is a : separated list of the following:
   #                   - $ududir - directory path to list (before prepending)
   #                   - $getpropath = 1 if &propath() should prepend
   #                   - $uname - username to use for &propath or user dir
   #                   - $udom - domain to use for &propath or user dir
   #                   All are escaped.
   #    $client     - Socket open on the client.
   # Returns:
   #     1 - indicating that the daemon should not disconnect.
   # Side Effects:
   #   The reply is written to $client.
   #
   
   sub du2_handler {
       my ($cmd, $tail, $client) = @_;
       my ($ududir,$getpropath,$uname,$udom) = map { &unescape($_) } (split(/:/, $tail));
       my $userinput = "$cmd:$tail";
       if (($ududir=~/\.\./) || (($ududir!~m|^/home/httpd/|) && (!$getpropath))) {
           &Failure($client,"refused\n","$cmd:$tail");
           return 1;
       }
       if ($getpropath) {
           if (($uname =~ /^$LONCAPA::match_name$/) && ($udom =~ /^$LONCAPA::match_domain$/)) {
               $ududir = &propath($udom,$uname).'/'.$ududir;
           } else {
               &Failure($client,"refused\n","$cmd:$tail");
               return 1;
           }
       }
       #  Since $ududir could have some nasties in it,
       #  we will require that ududir is a valid
       #  directory.  Just in case someone tries to
       #  slip us a  line like .;(cd /home/httpd rm -rf*)
       #  etc.
       #
       if (-d $ududir) {
           my $total_size=0;
           my $code=sub {
               if ($_=~/\.\d+\./) { return;}
               if ($_=~/\.meta$/) { return;}
               if (-d $_)         { return;}
               $total_size+=(stat($_))[7];
           };
           chdir($ududir);
           find($code,$ududir);
           $total_size=int($total_size/1024);
           &Reply($client,\$total_size,"$cmd:$ududir");
       } else {
           &Failure($client, "bad_directory:$ududir\n","$cmd:$tail");
       }
       return 1;
   }
   &register_handler("du2", \&du2_handler, 0, 1, 0);
   
 #  #
 # The ls_handler routine should be considered obosolete and is retained  # The ls_handler routine should be considered obsolete and is retained
 # for communication with legacy servers.  Please see the ls2_handler.  # for communication with legacy servers.  Please see the ls3_handler.
 #  #
 #   ls  - list the contents of a directory.  For each file in the  #   ls  - list the contents of a directory.  For each file in the
 #    selected directory the filename followed by the full output of  #    selected directory the filename followed by the full output of
Line 1340  sub ls_handler { Line 1627  sub ls_handler {
 }  }
 &register_handler("ls", \&ls_handler, 0, 1, 0);  &register_handler("ls", \&ls_handler, 0, 1, 0);
   
 #  # The ls2_handler routine should be considered obsolete and is retained
 # Please also see the ls_handler, which this routine obosolets.  # for communication with legacy servers.  Please see the ls3_handler.
   # Please also see the ls_handler, which was itself obsoleted by ls2.
 # ls2_handler differs from ls_handler in that it escapes its return   # ls2_handler differs from ls_handler in that it escapes its return 
 # values before concatenating them together with ':'s.  # values before concatenating them together with ':'s.
 #  #
Line 1406  sub ls2_handler { Line 1694  sub ls2_handler {
    return 1;     return 1;
 }  }
 &register_handler("ls2", \&ls2_handler, 0, 1, 0);  &register_handler("ls2", \&ls2_handler, 0, 1, 0);
   #
   #   ls3  - list the contents of a directory.  For each file in the
   #    selected directory the filename followed by the full output of
   #    the stat function is returned.  The returned info for each
   #    file are separated by ':'.  The stat fields are separated by &'s.
   # Parameters:
   #    $cmd        - The command that dispatched us (ls).
   #    $tail       - The tail of the request that invoked us.
   #                  $tail is a : separated list of the following:
   #                   - $ulsdir - directory path to list (before prepending)
   #                   - $getpropath = 1 if &propath() should prepend
   #                   - $getuserdir = 1 if path to user dir in lonUsers should
   #                                     prepend
   #                   - $alternate_root - path to prepend
   #                   - $uname - username to use for &propath or user dir
   #                   - $udom - domain to use for &propath or user dir
   #            All of these except $getpropath and &getuserdir are escaped.    
   #                  no_such_dir.
   #    $client     - Socket open on the client.
   # Returns:
   #     1 - indicating that the daemon should not disconnect.
   # Side Effects:
   #   The reply is written to $client.
   #
   
   sub ls3_handler {
       my ($cmd, $tail, $client) = @_;
       my $userinput = "$cmd:$tail";
       my ($ulsdir,$getpropath,$getuserdir,$alternate_root,$uname,$udom) =
           split(/:/,$tail);
       if (defined($ulsdir)) {
           $ulsdir = &unescape($ulsdir);
       }
       if (defined($alternate_root)) {
           $alternate_root = &unescape($alternate_root);
       }
       if (defined($uname)) {
           $uname = &unescape($uname);
       }
       if (defined($udom)) {
           $udom = &unescape($udom);
       }
   
       my $dir_root = $perlvar{'lonDocRoot'};
       if ($getpropath) {
           if (($uname =~ /^$LONCAPA::match_name$/) && ($udom =~ /^$LONCAPA::match_domain$/)) {
               $dir_root = &propath($udom,$uname);
               $dir_root =~ s/\/$//;
           } else {
               &Failure($client,"refused\n","$cmd:$tail");
               return 1;
           }
       } elsif ($getuserdir) {
           if (($uname =~ /^$LONCAPA::match_name$/) && ($udom =~ /^$LONCAPA::match_domain$/)) {
               my $subdir=$uname.'__';
               $subdir =~ s/(.)(.)(.).*/$1\/$2\/$3/;
               $dir_root = $Apache::lonnet::perlvar{'lonUsersDir'}
                          ."/$udom/$subdir/$uname";
           } else {
               &Failure($client,"refused\n","$cmd:$tail");
               return 1;
           }
       } elsif ($alternate_root ne '') {
           $dir_root = $alternate_root;
       }
       if (($dir_root ne '') && ($dir_root ne '/')) {
           if ($ulsdir =~ /^\//) {
               $ulsdir = $dir_root.$ulsdir;
           } else {
               $ulsdir = $dir_root.'/'.$ulsdir;
           }
       }
       my $obs;
       my $rights;
       my $ulsout='';
       my $ulsfn;
       if (-e $ulsdir) {
           if(-d $ulsdir) {
               if (opendir(LSDIR,$ulsdir)) {
                   while ($ulsfn=readdir(LSDIR)) {
                       undef($obs);
                       undef($rights);
                       my @ulsstats=stat($ulsdir.'/'.$ulsfn);
                       #We do some obsolete checking here
                       if(-e $ulsdir.'/'.$ulsfn.".meta") {
                           open(FILE, $ulsdir.'/'.$ulsfn.".meta");
                           my @obsolete=<FILE>;
                           foreach my $obsolete (@obsolete) {
                               if($obsolete =~ m/(<obsolete>)(on|1)/) { $obs = 1; }
                               if($obsolete =~ m|(<copyright>)(default)|) {
                                   $rights = 1;
                               }
                           }
                       }
                       my $tmp = $ulsfn.'&'.join('&',@ulsstats);
                       if ($obs    eq '1') { $tmp.="&1"; } else { $tmp.="&0"; }
                       if ($rights eq '1') { $tmp.="&1"; } else { $tmp.="&0"; }
                       $ulsout.= &escape($tmp).':';
                   }
                   closedir(LSDIR);
               }
           } else {
               my @ulsstats=stat($ulsdir);
               $ulsout.=$ulsfn.'&'.join('&',@ulsstats).':';
           }
       } else {
           $ulsout='no_such_dir';
       }
       if ($ulsout eq '') { $ulsout='empty'; }
       &Reply($client, \$ulsout, $userinput); # This supports debug logging.
       return 1;
   }
   &register_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;
   }
   &register_handler("readlonnetglobal", \&read_lonnet_global, 0, 1, 0);
   
   sub server_devalidatecache_handler {
       my ($cmd,$tail,$client) = @_;
       my $userinput = "$cmd:$tail";
       my $items = &unescape($tail);
       my @cached = split(/\&/,$items);
       foreach my $key (@cached) {
           if ($key =~ /:/) {
               my ($name,$id) = map { &unescape($_); } split(/:/,$key);
               &Apache::lonnet::devalidate_cache_new($name,$id);
           }
       }
       my $result = 'ok';
       &Reply($client,\$result,$userinput);
       return 1;
   }
   &register_handler("devalidatecache", \&server_devalidatecache_handler, 0, 1, 0);
   
   sub server_timezone_handler {
       my ($cmd,$tail,$client) = @_;
       my $userinput = "$cmd:$tail";
       my $timezone;
       my $clockfile = '/etc/sysconfig/clock'; # Fedora/CentOS/SuSE
       my $tzfile = '/etc/timezone'; # Debian/Ubuntu
       if (-e $clockfile) {
           if (open(my $fh,"<$clockfile")) {
               while (<$fh>) {
                   next if (/^[\#\s]/);
                   if (/^(?:TIME)?ZONE\s*=\s*['"]?\s*([\w\/]+)/) {
                       $timezone = $1;
                       last;
                   }
               }
               close($fh);
           }
       } elsif (-e $tzfile) {
           if (open(my $fh,"<$tzfile")) {
               $timezone = <$fh>;
               close($fh);
               chomp($timezone);
               if ($timezone =~ m{^Etc/(\w+)$}) {
                   $timezone = $1;
               }
           }
       }
       &Reply($client,\$timezone,$userinput); # This supports debug logging.
       return 1;
   }
   &register_handler("servertimezone", \&server_timezone_handler, 0, 1, 0);
   
   sub server_loncaparev_handler {
       my ($cmd,$tail,$client) = @_;
       my $userinput = "$cmd:$tail";
       &Reply($client,\$perlvar{'lonVersion'},$userinput);
       return 1;
   }
   &register_handler("serverloncaparev", \&server_loncaparev_handler, 0, 1, 0);
   
   sub server_homeID_handler {
       my ($cmd,$tail,$client) = @_;
       my $userinput = "$cmd:$tail";
       &Reply($client,\$perlvar{'lonHostID'},$userinput);
       return 1;
   }
   &register_handler("serverhomeID", \&server_homeID_handler, 0, 1, 0);
   
   sub server_distarch_handler {
       my ($cmd,$tail,$client) = @_;
       my $userinput = "$cmd:$tail";
       my $reply = &distro_and_arch();
       &Reply($client,\$reply,$userinput);
       return 1;
   }
   &register_handler("serverdistarch", \&server_distarch_handler, 0, 1, 0);
   
   sub server_certs_handler {
       my ($cmd,$tail,$client) = @_;
       my $userinput = "$cmd:$tail";
       my $result;
       my $result = &LONCAPA::Lond::server_certs(\%perlvar);
       &Reply($client,\$result,$userinput);
       return;
   }
   &register_handler("servercerts", \&server_certs_handler, 0, 1, 0);
   
 #   Process a reinit request.  Reinit requests that either  #   Process a reinit request.  Reinit requests that either
 #   lonc or lond be reinitialized so that an updated   #   lonc or lond be reinitialized so that an updated 
Line 1516  sub authenticate_handler { Line 2058  sub authenticate_handler {
     #  upass   - User's password.      #  upass   - User's password.
     #  checkdefauth - Pass to validate_user() to try authentication      #  checkdefauth - Pass to validate_user() to try authentication
     #                 with default auth type(s) if no user account.      #                 with default auth type(s) if no user account.
       #  clientcancheckhost - Passed by clients with functionality in lonauth.pm
       #                       to check if session can be hosted.
           
     my ($udom, $uname, $upass, $checkdefauth)=split(/:/,$tail);      my ($udom, $uname, $upass, $checkdefauth, $clientcancheckhost)=split(/:/,$tail);
     &Debug(" Authenticate domain = $udom, user = $uname, password = $upass");      &Debug(" Authenticate domain = $udom, user = $uname, password = $upass,  checkdefauth = $checkdefauth");
     chomp($upass);      chomp($upass);
     $upass=&unescape($upass);      $upass=&unescape($upass);
   
     my $pwdcorrect = &validate_user($udom,$uname,$upass,$checkdefauth);      my $pwdcorrect = &validate_user($udom,$uname,$upass,$checkdefauth);
     if($pwdcorrect) {      if($pwdcorrect) {
  &Reply( $client, "authorized\n", $userinput);          my $canhost = 1;
           unless ($clientcancheckhost) {
               my $uprimary_id = &Apache::lonnet::domain($udom,'primary');
               my $uint_dom = &Apache::lonnet::internet_dom($uprimary_id);
               my @intdoms;
               my $internet_names = &Apache::lonnet::get_internet_names($clientname);
               if (ref($internet_names) eq 'ARRAY') {
                   @intdoms = @{$internet_names};
               }
               unless ($uint_dom ne '' && grep(/^\Q$uint_dom\E$/,@intdoms)) {
                   my ($remote,$hosted);
                   my $remotesession = &get_usersession_config($udom,'remotesession');
                   if (ref($remotesession) eq 'HASH') {
                       $remote = $remotesession->{'remote'};
                   }
                   my $hostedsession = &get_usersession_config($clienthomedom,'hostedsession');
                   if (ref($hostedsession) eq 'HASH') {
                       $hosted = $hostedsession->{'hosted'};
                   }
                   $canhost = &Apache::lonnet::can_host_session($udom,$clientname,
                                                                $clientversion,
                                                                $remote,$hosted);
               }
           }
           if ($canhost) {               
               &Reply( $client, "authorized\n", $userinput);
           } else {
               &Reply( $client, "not_allowed_to_host\n", $userinput);
           }
  #   #
  #  Bad credentials: Failed to authorize   #  Bad credentials: Failed to authorize
  #   #
Line 1569  sub change_password_handler { Line 2141  sub change_password_handler {
     #  npass - New password.      #  npass - New password.
     #  context - Context in which this was called       #  context - Context in which this was called 
     #            (preferences or reset_by_email).      #            (preferences or reset_by_email).
       #  lonhost - HostID of server where request originated 
         
     my ($udom,$uname,$upass,$npass,$context)=split(/:/,$tail);      my ($udom,$uname,$upass,$npass,$context,$lonhost)=split(/:/,$tail);
   
     $upass=&unescape($upass);      $upass=&unescape($upass);
     $npass=&unescape($npass);      $npass=&unescape($npass);
Line 1579  sub change_password_handler { Line 2152  sub change_password_handler {
     # First require that the user can be authenticated with their      # First require that the user can be authenticated with their
     # old password unless context was 'reset_by_email':      # old password unless context was 'reset_by_email':
           
     my $validated;      my ($validated,$failure);
     if ($context eq 'reset_by_email') {      if ($context eq 'reset_by_email') {
         $validated = 1;          if ($lonhost eq '') {
               $failure = 'invalid_client';
           } else {
               $validated = 1;
           }
     } else {      } else {
         $validated = &validate_user($udom, $uname, $upass);          $validated = &validate_user($udom, $uname, $upass);
     }      }
Line 1591  sub change_password_handler { Line 2168  sub change_password_handler {
  my ($howpwd,$contentpwd)=split(/:/,$realpasswd);   my ($howpwd,$contentpwd)=split(/:/,$realpasswd);
  if ($howpwd eq 'internal') {   if ($howpwd eq 'internal') {
     &Debug("internal auth");      &Debug("internal auth");
     my $salt=time;              my $ncpass = &hash_passwd($udom,$npass);
     $salt=substr($salt,6,2);  
     my $ncpass=crypt($npass,$salt);  
     if(&rewrite_password_file($udom, $uname, "internal:$ncpass")) {      if(&rewrite_password_file($udom, $uname, "internal:$ncpass")) {
  &logthis("Result of password change for "   my $msg="Result of password change for $uname: pwchange_success";
  ."$uname: pwchange_success");                  if ($lonhost) {
                       $msg .= " - request originated from: $lonhost";
                   }
                   &logthis($msg);
                   &update_passwd_history($uname,$udom,$howpwd,$context);
  &Reply($client, "ok\n", $userinput);   &Reply($client, "ok\n", $userinput);
     } else {      } else {
  &logthis("Unable to open $uname passwd "                  &logthis("Unable to open $uname passwd "               
Line 1605  sub change_password_handler { Line 2184  sub change_password_handler {
     }      }
  } elsif ($howpwd eq 'unix' && $context ne 'reset_by_email') {   } elsif ($howpwd eq 'unix' && $context ne 'reset_by_email') {
     my $result = &change_unix_password($uname, $npass);      my $result = &change_unix_password($uname, $npass);
               if ($result eq 'ok') {
                   &update_passwd_history($uname,$udom,$howpwd,$context);
                }
     &logthis("Result of password change for $uname: ".      &logthis("Result of password change for $uname: ".
      $result);       $result);
     &Reply($client, \$result, $userinput);      &Reply($client, \$result, $userinput);
Line 1617  sub change_password_handler { Line 2199  sub change_password_handler {
  }     }  
   
     } else {      } else {
  &Failure( $client, "non_authorized\n", $userinput);   if ($failure eq '') {
       $failure = 'non_authorized';
    }
    &Failure( $client, "$failure\n", $userinput);
     }      }
   
     return 1;      return 1;
 }  }
 &register_handler("passwd", \&change_password_handler, 1, 1, 0);  &register_handler("passwd", \&change_password_handler, 1, 1, 0);
   
   sub hash_passwd {
       my ($domain,$plainpass,@rest) = @_;
       my ($salt,$cost);
       if (@rest) {
           $cost = $rest[0];
           # salt is first 22 characters, base-64 encoded by bcrypt
           my $plainsalt = substr($rest[1],0,22);
           $salt = Crypt::Eksblowfish::Bcrypt::de_base64($plainsalt);
       } else {
           my $defaultcost;
           my %domconfig =
               &Apache::lonnet::get_dom('configuration',['password'],$domain);
           if (ref($domconfig{'password'}) eq 'HASH') {
               $defaultcost = $domconfig{'password'}{'cost'};
           }
           if (($defaultcost eq '') || ($defaultcost =~ /D/)) {
               $cost = 10;
           } else {
               $cost = $defaultcost;
           }
           # Generate random 16-octet base64 salt
           $salt = "";
           $salt .= pack("C", int rand(256)) for 1..16;
       }
       my $hash = &Crypt::Eksblowfish::Bcrypt::bcrypt_hash({
           key_nul => 1,
           cost    => $cost,
           salt    => $salt,
       }, Digest::SHA::sha512(Encode::encode('UTF-8',$plainpass)));
   
       my $result = join("!", "", "bcrypt", sprintf("%02d",$cost),
                   &Crypt::Eksblowfish::Bcrypt::en_base64($salt).
                   &Crypt::Eksblowfish::Bcrypt::en_base64($hash));
       return $result;
   }
   
 #  #
 #   Create a new user.  User in this case means a lon-capa user.  #   Create a new user.  User in this case means a lon-capa user.
 #   The user must either already exist in some authentication realm  #   The user must either already exist in some authentication realm
Line 1667  sub add_user_handler { Line 2288  sub add_user_handler {
     ."makeuser";      ."makeuser";
     }      }
     unless ($fperror) {      unless ($fperror) {
  my $result=&make_passwd_file($uname, $umode,$npass, $passfilename);   my $result=&make_passwd_file($uname,$udom,$umode,$npass,
                                                $passfilename,'makeuser');
  &Reply($client,\$result, $userinput);     #BUGBUG - could be fail   &Reply($client,\$result, $userinput);     #BUGBUG - could be fail
     } else {      } else {
  &Failure($client, \$fperror, $userinput);   &Failure($client, \$fperror, $userinput);
Line 1728  sub change_authentication_handler { Line 2350  sub change_authentication_handler {
  my $passfilename = &password_path($udom, $uname);   my $passfilename = &password_path($udom, $uname);
  if ($passfilename) { # Not allowed to create a new user!!   if ($passfilename) { # Not allowed to create a new user!!
     # If just changing the unix passwd. need to arrange to run      # If just changing the unix passwd. need to arrange to run
     # passwd since otherwise make_passwd_file will run      # passwd since otherwise make_passwd_file will fail as 
     # lcuseradd which fails if an account already exists      # creation of unix authenticated users is no longer supported
     # (to prevent an unscrupulous LONCAPA admin from stealing              # except from the command line, when running make_domain_coordinator.pl
     # an existing account by overwriting it as a LonCAPA account).  
   
     if(($oldauth =~/^unix/) && ($umode eq "unix")) {      if(($oldauth =~/^unix/) && ($umode eq "unix")) {
  my $result = &change_unix_password($uname, $npass);   my $result = &change_unix_password($uname, $npass);
  &logthis("Result of password change for $uname: ".$result);   &logthis("Result of password change for $uname: ".$result);
  if ($result eq "ok") {   if ($result eq "ok") {
                       &update_passwd_history($uname,$udom,$umode,'changeuserauth'); 
     &Reply($client, \$result);      &Reply($client, \$result);
  } else {   } else {
     &Failure($client, \$result);      &Failure($client, \$result);
  }   }
     } else {      } else {
  my $result=&make_passwd_file($uname, $umode,$npass,$passfilename);   my $result=&make_passwd_file($uname,$udom,$umode,$npass,
                                                $passfilename,'changeuserauth');
  #   #
  #  If the current auth mode is internal, and the old auth mode was   #  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,   #  unix, or krb*,  and the user is an author for this domain,
  #  re-run manage_permissions for that role in order to be able   #  re-run manage_permissions for that role in order to be able
  #  to take ownership of the construction space back to www:www   #  to take ownership of the construction space back to www:www
  #   #
   
   
  if( (($oldauth =~ /^unix/) && ($umode eq "internal")) ||  
     (($oldauth =~ /^internal/) && ($umode eq "unix")) ) {   
     if(&is_author($udom, $uname)) {  
  &Debug(" Need to manage author permissions...");  
  &manage_permissions("/$udom/_au", $udom, $uname, "$umode:");  
     }  
  }  
  &Reply($client, \$result, $userinput);   &Reply($client, \$result, $userinput);
     }      }
                 
Line 1770  sub change_authentication_handler { Line 2386  sub change_authentication_handler {
 }  }
 &register_handler("changeuserauth", \&change_authentication_handler, 1,1, 0);  &register_handler("changeuserauth", \&change_authentication_handler, 1,1, 0);
   
   sub update_passwd_history {
       my ($uname,$udom,$umode,$context) = @_;
       my $proname=&propath($udom,$uname);
       my $now = time;
       if (open(my $fh,">>$proname/passwd.log")) {
           print $fh "$now:$umode:$context\n";
           close($fh);
       }
       return;
   }
   
 #  #
 #   Determines if this is the home server for a user.  The home server  #   Determines if this is the home server for a user.  The home server
 #   for a user will have his/her lon-capa passwd file.  Therefore all we need  #   for a user will have his/her lon-capa passwd file.  Therefore all we need
Line 1804  sub is_home_handler { Line 2431  sub is_home_handler {
 &register_handler("home", \&is_home_handler, 0,1,0);  &register_handler("home", \&is_home_handler, 0,1,0);
   
 #  #
 #   Process an update request for a resource?? I think what's going on here is  #   Process an update request for a resource.
 #   that a resource has been modified that we hold a subscription to.  #   A resource has been modified that we hold a subscription to.
 #   If the resource is not local, then we must update, or at least invalidate our  #   If the resource is not local, then we must update, or at least invalidate our
 #   cached copy of the resource.   #   cached copy of the resource. 
 #   FUTURE WORK:  
 #      I need to look at this logic carefully.  My druthers would be to follow  
 #      typical caching logic, and simple invalidate the cache, drop any subscription  
 #      an let the next fetch start the ball rolling again... however that may  
 #      actually be more difficult than it looks given the complex web of  
 #      proxy servers.  
 # Parameters:  # Parameters:
 #    $cmd      - The command that got us here.  #    $cmd      - The command that got us here.
 #    $tail     - Tail of the command (remaining parameters).  #    $tail     - Tail of the command (remaining parameters).
Line 1837  sub update_resource_handler { Line 2458  sub update_resource_handler {
     my $ownership=ishome($fname);      my $ownership=ishome($fname);
     if ($ownership eq 'not_owner') {      if ($ownership eq 'not_owner') {
  if (-e $fname) {   if (-e $fname) {
               # Delete preview file, if exists
               unlink("$fname.tmp");
               # Get usage stats
     my ($dev,$ino,$mode,$nlink,$uid,$gid,$rdev,$size,      my ($dev,$ino,$mode,$nlink,$uid,$gid,$rdev,$size,
  $atime,$mtime,$ctime,$blksize,$blocks)=stat($fname);   $atime,$mtime,$ctime,$blksize,$blocks)=stat($fname);
     my $now=time;      my $now=time;
     my $since=$now-$atime;      my $since=$now-$atime;
               # If the file has not been used within lonExpire seconds,
               # unsubscribe from it and delete local copy
     if ($since>$perlvar{'lonExpire'}) {      if ($since>$perlvar{'lonExpire'}) {
  my $reply=&Apache::lonnet::reply("unsub:$fname","$clientname");   my $reply=&Apache::lonnet::reply("unsub:$fname","$clientname");
  &devalidate_meta_cache($fname);   &devalidate_meta_cache($fname);
  unlink("$fname");   unlink("$fname");
  unlink("$fname.meta");   unlink("$fname.meta");
     } else {      } else {
               # Yes, this is in active use. Get a fresh copy. Since it might be in
               # very active use and huge (like a movie), copy it to "in.transfer" filename first.
  my $transname="$fname.in.transfer";   my $transname="$fname.in.transfer";
  my $remoteurl=&Apache::lonnet::reply("sub:$fname","$clientname");   my $remoteurl=&Apache::lonnet::reply("sub:$fname","$clientname");
  my $response;   my $response;
  alarm(120);  # FIXME: cannot replicate files that take more than two minutes to transfer?
   # alarm(120);
   # FIXME: this should use the LWP mechanism, not internal alarms.
                   alarm(1200);
  {   {
     my $ua=new LWP::UserAgent;  
     my $request=new HTTP::Request('GET',"$remoteurl");      my $request=new HTTP::Request('GET',"$remoteurl");
     $response=$ua->request($request,$transname);                      $response=&LONCAPA::LWPReq::makerequest($clientname,$request,$transname,\%perlvar,1200,0,1);
  }   }
  alarm(0);   alarm(0);
  if ($response->is_error()) {   if ($response->is_error()) {
   # FIXME: we should probably clean up here instead of just whine
     unlink($transname);      unlink($transname);
     my $message=$response->status_line;      my $message=$response->status_line;
     &logthis("LWP GET: $message for $fname ($remoteurl)");      &logthis("LWP GET: $message for $fname ($remoteurl)");
  } else {   } else {
     if ($remoteurl!~/\.meta$/) {      if ($remoteurl!~/\.meta$/) {
   # FIXME: isn't there an internal LWP mechanism for this?
  alarm(120);   alarm(120);
  {   {
     my $ua=new LWP::UserAgent;  
     my $mrequest=new HTTP::Request('GET',$remoteurl.'.meta');      my $mrequest=new HTTP::Request('GET',$remoteurl.'.meta');
     my $mresponse=$ua->request($mrequest,$fname.'.meta');                              my $mresponse = &LONCAPA::LWPReq::makerequest($clientname,$mrequest,$fname.'.meta',\%perlvar,120,0,1);
     if ($mresponse->is_error()) {      if ($mresponse->is_error()) {
  unlink($fname.'.meta');   unlink($fname.'.meta');
     }      }
  }   }
  alarm(0);   alarm(0);
     }      }
                       # we successfully transfered, copy file over to real name
     rename($transname,$fname);      rename($transname,$fname);
     &devalidate_meta_cache($fname);      &devalidate_meta_cache($fname);
  }   }
Line 1935  sub fetch_user_file_handler { Line 2567  sub fetch_user_file_handler {
   
  my $destname=$udir.'/'.$ufile;   my $destname=$udir.'/'.$ufile;
  my $transname=$udir.'/'.$ufile.'.in.transit';   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;   my $response;
  Debug("Remote URL : $remoteurl Transfername $transname Destname: $destname");   Debug("Remote URL : $remoteurl Transfername $transname Destname: $destname");
  alarm(120);   alarm(1200);
  {   {
     my $ua=new LWP::UserAgent;  
     my $request=new HTTP::Request('GET',"$remoteurl");      my $request=new HTTP::Request('GET',"$remoteurl");
     $response=$ua->request($request,$transname);              my $verifycert = 1;
               my @machine_ids = &Apache::lonnet::current_machine_ids();
               if (grep(/^\Q$clientname\E$/,@machine_ids)) {
                   $verifycert = 0;
               }
               $response = &LONCAPA::LWPReq::makerequest($clientname,$request,$transname,\%perlvar,1200,$verifycert);
  }   }
  alarm(0);   alarm(0);
  if ($response->is_error()) {   if ($response->is_error()) {
Line 1957  sub fetch_user_file_handler { Line 2596  sub fetch_user_file_handler {
  unlink($transname);   unlink($transname);
  &Failure($client, "failed\n", $userinput);   &Failure($client, "failed\n", $userinput);
     } else {      } else {
                   if ($fname =~ /^default.+\.(page|sequence)$/) {
                       my ($major,$minor) = split(/\./,$clientversion);
                       if (($major < 2) || ($major == 2 && $minor < 11)) {
                           my $now = time;
                           &Apache::lonnet::do_cache_new('crschange',$udom.'_'.$uname,$now,600);
                           my $key = &escape('internal.contentchange');
                           my $what = "$key=$now";
                           my $hashref = &tie_user_hash($udom,$uname,'environment',
                                                        &GDBM_WRCREAT(),"P",$what);
                           if ($hashref) {
                               $hashref->{$key}=$now;
                               if (!&untie_user_hash($hashref)) {
                                   &logthis("error: ".($!+0)." untie (GDBM) failed ".
                                            "when updating internal.contentchange");
                               }
                           }
                       }
                   }
  &Reply($client, "ok\n", $userinput);   &Reply($client, "ok\n", $userinput);
     }      }
  }      }   
Line 1993  sub remove_user_file_handler { Line 2650  sub remove_user_file_handler {
     if (-e $file) {      if (-e $file) {
  #   #
  #   If the file is a regular file unlink is fine...   #   If the file is a regular file unlink is fine...
  #   However it's possible the client wants a dir.   #   However it's possible the client wants a dir 
  #   removed, in which case rmdir is more approprate:   #   removed, in which case rmdir is more appropriate.
    #   Note: rmdir will only remove an empty directory.
  #   #
         if (-f $file){          if (-f $file){
     unlink($file);      unlink($file);
                       # for html files remove the associated .bak file 
                       # which may have been created by the editor.
                       if ($ufile =~ m{^((docs|supplemental)/(?:\d+|default)/\d+(?:|/.+)/)[^/]+\.x?html?$}i) {
                           my $path = $1;
                           if (-e $file.'.bak') {
                               unlink($file.'.bak');
                           }
                       }
  } elsif(-d $file) {   } elsif(-d $file) {
     rmdir($file);      rmdir($file);
  }   }
Line 2111  sub user_has_session_handler { Line 2777  sub user_has_session_handler {
   
     my ($udom, $uname) = map { &unescape($_) } (split(/:/, $tail));      my ($udom, $uname) = map { &unescape($_) } (split(/:/, $tail));
           
     &logthis("Looking for $udom $uname");  
     opendir(DIR,$perlvar{'lonIDsDir'});      opendir(DIR,$perlvar{'lonIDsDir'});
     my $filename;      my $filename;
     while ($filename=readdir(DIR)) {      while ($filename=readdir(DIR)) {
Line 2361  sub newput_user_profile_entry { Line 3026  sub newput_user_profile_entry {
     foreach my $pair (@pairs) {      foreach my $pair (@pairs) {
  my ($key,$value)=split(/=/,$pair);   my ($key,$value)=split(/=/,$pair);
  if (exists($hashref->{$key})) {   if (exists($hashref->{$key})) {
     &Failure($client, "key_exists: ".$key."\n",$userinput);              if (!&untie_user_hash($hashref)) {
     return 1;                  &logthis("error: ".($!+0)." untie (GDBM) failed ".
                            "while attempting newput - early out as key exists");
               }
               &Failure($client, "key_exists: ".$key."\n",$userinput);
               return 1;
  }   }
     }      }
   
Line 2764  sub get_profile_keys { Line 3433  sub get_profile_keys {
 sub dump_profile_database {  sub dump_profile_database {
     my ($cmd, $tail, $client) = @_;      my ($cmd, $tail, $client) = @_;
   
       my $res = LONCAPA::Lond::dump_profile_database($tail);
   
       if ($res =~ /^error:/) {
           Failure($client, \$res, "$cmd:$tail");
       } else {
           Reply($client, \$res, "$cmd:$tail");
       }
   
       return 1;  
   
       #TODO remove 
     my $userinput = "$cmd:$tail";      my $userinput = "$cmd:$tail";
         
     my ($udom,$uname,$namespace) = split(/:/,$tail);      my ($udom,$uname,$namespace) = split(/:/,$tail);
Line 2830  sub dump_profile_database { Line 3510  sub dump_profile_database {
 #                                             that is matched against  #                                             that is matched against
 #                                             database keywords to do  #                                             database keywords to do
 #                                             selective dumps.  #                                             selective dumps.
   #                               range       - optional range of entries
   #                                             e.g., 10-20 would return the
   #                                             10th to 19th items, etc.  
 #   $client                   - Channel open on the client.  #   $client                   - Channel open on the client.
 # Returns:  # Returns:
 #    1    - Continue processing.  #    1    - Continue processing.
Line 2839  sub dump_profile_database { Line 3522  sub dump_profile_database {
 sub dump_with_regexp {  sub dump_with_regexp {
     my ($cmd, $tail, $client) = @_;      my ($cmd, $tail, $client) = @_;
   
       my $res = LONCAPA::Lond::dump_with_regexp($tail, $clientversion);
     my $userinput = "$cmd:$tail";      
       if ($res =~ /^error:/) {
     my ($udom,$uname,$namespace,$regexp,$range)=split(/:/,$tail);          Failure($client, \$res, "$cmd:$tail");
     if (defined($regexp)) {  
  $regexp=&unescape($regexp);  
     } else {  
  $regexp='.';  
     }  
     my ($start,$end);  
     if (defined($range)) {  
  if ($range =~/^(\d+)\-(\d+)$/) {  
     ($start,$end) = ($1,$2);  
  } elsif ($range =~/^(\d+)$/) {  
     ($start,$end) = (0,$1);  
  } else {  
     undef($range);  
  }  
     }  
     my $hashref = &tie_user_hash($udom, $uname, $namespace,  
  &GDBM_READER());  
     if ($hashref) {  
         my $qresult='';  
  my $count=0;  
  while (my ($key,$value) = each(%$hashref)) {  
     if ($regexp eq '.') {  
  $count++;  
  if (defined($range) && $count >= $end)   { last; }  
  if (defined($range) && $count <  $start) { next; }  
  $qresult.=$key.'='.$value.'&';  
     } else {  
  my $unescapeKey = &unescape($key);  
  if (eval('$unescapeKey=~/$regexp/')) {  
     $count++;  
     if (defined($range) && $count >= $end)   { last; }  
     if (defined($range) && $count <  $start) { next; }  
     $qresult.="$key=$value&";  
  }  
     }  
  }  
  if (&untie_user_hash($hashref)) {  
     chop($qresult);  
     &Reply($client, \$qresult, $userinput);  
  } else {  
     &Failure( $client, "error: ".($!+0)." untie(GDBM) Failed ".  
      "while attempting dump\n", $userinput);  
  }  
     } else {      } else {
  &Failure($client, "error: ".($!+0)." tie(GDBM) Failed ".          Reply($client, \$res, "$cmd:$tail");
  "while attempting dump\n", $userinput);  
     }      }
   
     return 1;      return 1;
Line 2905  sub dump_with_regexp { Line 3544  sub dump_with_regexp {
 #                          namespace   - Name of the database being modified  #                          namespace   - Name of the database being modified
 #                          rid         - Resource keyword to modify.  #                          rid         - Resource keyword to modify.
 #                          what        - new value associated with rid.  #                          what        - new value associated with rid.
   #                          laststore   - (optional) version=timestamp
   #                                        for most recent transaction for rid
   #                                        in namespace, when cstore was called
 #  #
 #    $client             - Socket open on the client.  #    $client             - Socket open on the client.
 #  #
Line 2913  sub dump_with_regexp { Line 3555  sub dump_with_regexp {
 #      1 (keep on processing).  #      1 (keep on processing).
 #  Side-Effects:  #  Side-Effects:
 #    Writes to the client  #    Writes to the client
   #    Successful storage will cause either 'ok', or, if $laststore was included
   #    in the tail of the request, and the version number for the last transaction
   #    is larger than the version in $laststore, delay:$numtrans , where $numtrans
   #    is the number of store evevnts recorded for rid in namespace since
   #    lonnet::store() was called by the client.
   #
 sub store_handler {  sub store_handler {
     my ($cmd, $tail, $client) = @_;      my ($cmd, $tail, $client) = @_;
     
     my $userinput = "$cmd:$tail";      my $userinput = "$cmd:$tail";
       chomp($tail);
     my ($udom,$uname,$namespace,$rid,$what) =split(/:/,$tail);      my ($udom,$uname,$namespace,$rid,$what,$laststore) =split(/:/,$tail);
     if ($namespace ne 'roles') {      if ($namespace ne 'roles') {
   
  chomp($what);  
  my @pairs=split(/\&/,$what);   my @pairs=split(/\&/,$what);
  my $hashref  = &tie_user_hash($udom, $uname, $namespace,   my $hashref  = &tie_user_hash($udom, $uname, $namespace,
        &GDBM_WRCREAT(), "S",         &GDBM_WRCREAT(), "S",
        "$rid:$what");         "$rid:$what");
  if ($hashref) {   if ($hashref) {
     my $now = time;      my $now = time;
     my @previouskeys=split(/&/,$hashref->{"keys:$rid"});              my $numtrans;
     my $key;              if ($laststore) {
                   my ($previousversion,$previoustime) = split(/\=/,$laststore);
                   my ($lastversion,$lasttime) = (0,0);
                   $lastversion = $hashref->{"version:$rid"};
                   if ($lastversion) {
                       $lasttime = $hashref->{"$lastversion:$rid:timestamp"};
                   }
                   if (($previousversion) && ($previousversion !~ /\D/)) {
                       if (($lastversion > $previousversion) && ($lasttime >= $previoustime)) {
                           $numtrans = $lastversion - $previousversion;
                       }
                   } elsif ($lastversion) {
                       $numtrans = $lastversion;
                   }
                   if ($numtrans) {
                       $numtrans =~ s/D//g;
                   }
               }
     $hashref->{"version:$rid"}++;      $hashref->{"version:$rid"}++;
     my $version=$hashref->{"version:$rid"};      my $version=$hashref->{"version:$rid"};
     my $allkeys='';       my $allkeys=''; 
Line 2942  sub store_handler { Line 3606  sub store_handler {
     $allkeys.='timestamp';      $allkeys.='timestamp';
     $hashref->{"$version:keys:$rid"}=$allkeys;      $hashref->{"$version:keys:$rid"}=$allkeys;
     if (&untie_user_hash($hashref)) {      if (&untie_user_hash($hashref)) {
  &Reply($client, "ok\n", $userinput);                  my $msg = 'ok';
                   if ($numtrans) {
                       $msg = 'delay:'.$numtrans;
                   }
    &Reply($client, "$msg\n", $userinput);
     } else {      } else {
  &Failure($client, "error: ".($!+0)." untie(GDBM) Failed ".   &Failure($client, "error: ".($!+0)." untie(GDBM) Failed ".
  "while attempting store\n", $userinput);   "while attempting store\n", $userinput);
Line 3428  sub put_course_id_hash_handler { Line 4096  sub put_course_id_hash_handler {
 #                            will be returned. Pre-2.2.0 legacy entries from   #                            will be returned. Pre-2.2.0 legacy entries from 
 #                            nohist_courseiddump will only contain usernames.  #                            nohist_courseiddump will only contain usernames.
 #                 type     - optional parameter for selection   #                 type     - optional parameter for selection 
 #                 regexp_ok - if true, allow the supplied institutional code  #                 regexp_ok - if 1 or -1 allow the supplied institutional code
 #                            filter to behave as a regular expression.    #                            filter to behave as a regular expression:
   #                      1 will not exclude the course if the instcode matches the RE 
   #                            -1 will exclude the course if the instcode matches the RE
 #                 rtn_as_hash - whether to return the information available for  #                 rtn_as_hash - whether to return the information available for
 #                            each matched item as a frozen hash of all   #                            each matched item as a frozen hash of all 
 #                            key, value pairs in the item's hash, or as a   #                            key, value pairs in the item's hash, or as a 
 #                            colon-separated list of (in order) description,  #                            colon-separated list of (in order) description,
 #                            institutional code, and course owner.  #                            institutional code, and course owner.
 #      #                 selfenrollonly - filter by courses allowing self-enrollment  
   #                                  now or in the future (selfenrollonly = 1).
   #                 catfilter - filter by course category, assigned to a course 
   #                             using manually defined categories (i.e., not
   #                             self-cataloging based on on institutional code).   
   #                 showhidden - include course in results even if course  
   #                              was set to be excluded from course catalog (DC only).
   #                 caller -  if set to 'coursecatalog', courses set to be hidden
   #                           from course catalog will be excluded from results (unless
   #                           overridden by "showhidden".
   #                 cloner - escaped username:domain of course cloner (if picking course to
   #                          clone).
   #                 cc_clone_list - escaped comma separated list of courses for which 
   #                                 course cloner has active CC role (and so can clone
   #                                 automatically).
   #                 cloneonly - filter by courses for which cloner has rights to clone.
   #                 createdbefore - include courses for which creation date preceeded this date.
   #                 createdafter - include courses for which creation date followed this date.
   #                 creationcontext - include courses created in specified context 
   #
   #                 domcloner - flag to indicate if user can create CCs in course's domain.
   #                             If so, ability to clone course is automatic.
   #                 hasuniquecode - filter by courses for which a six character unique code has 
   #                                 been set.
   #
 #     $client  - The socket open on the client.  #     $client  - The socket open on the client.
 # Returns:  # Returns:
 #    1     - Continue processing.  #    1     - Continue processing.
Line 3443  sub put_course_id_hash_handler { Line 4137  sub put_course_id_hash_handler {
 #   a reply is written to $client.  #   a reply is written to $client.
 sub dump_course_id_handler {  sub dump_course_id_handler {
     my ($cmd, $tail, $client) = @_;      my ($cmd, $tail, $client) = @_;
   
       my $res = LONCAPA::Lond::dump_course_id_handler($tail);
       if ($res =~ /^error:/) {
           Failure($client, \$res, "$cmd:$tail");
       } else {
           Reply($client, \$res, "$cmd:$tail");
       }
   
       return 1;  
   
       #TODO remove
     my $userinput = "$cmd:$tail";      my $userinput = "$cmd:$tail";
   
     my ($udom,$since,$description,$instcodefilter,$ownerfilter,$coursefilter,      my ($udom,$since,$description,$instcodefilter,$ownerfilter,$coursefilter,
         $typefilter,$regexp_ok,$rtn_as_hash,$selfenrollonly) =split(/:/,$tail);          $typefilter,$regexp_ok,$rtn_as_hash,$selfenrollonly,$catfilter,$showhidden,
           $caller,$cloner,$cc_clone_list,$cloneonly,$createdbefore,$createdafter,
           $creationcontext,$domcloner,$hasuniquecode) =split(/:/,$tail);
     my $now = time;      my $now = time;
       my ($cloneruname,$clonerudom,%cc_clone);
     if (defined($description)) {      if (defined($description)) {
  $description=&unescape($description);   $description=&unescape($description);
     } else {      } else {
Line 3487  sub dump_course_id_handler { Line 4195  sub dump_course_id_handler {
     if (defined($regexp_ok)) {      if (defined($regexp_ok)) {
         $regexp_ok=&unescape($regexp_ok);          $regexp_ok=&unescape($regexp_ok);
     }      }
       if (defined($catfilter)) {
           $catfilter=&unescape($catfilter);
       }
       if (defined($cloner)) {
           $cloner = &unescape($cloner);
           ($cloneruname,$clonerudom) = ($cloner =~ /^($LONCAPA::match_username):($LONCAPA::match_domain)$/); 
       }
       if (defined($cc_clone_list)) {
           $cc_clone_list = &unescape($cc_clone_list);
           my @cc_cloners = split('&',$cc_clone_list);
           foreach my $cid (@cc_cloners) {
               my ($clonedom,$clonenum) = split(':',$cid);
               next if ($clonedom ne $udom); 
               $cc_clone{$clonedom.'_'.$clonenum} = 1;
           } 
       }
       if ($createdbefore ne '') {
           $createdbefore = &unescape($createdbefore);
       } else {
          $createdbefore = 0;
       }
       if ($createdafter ne '') {
           $createdafter = &unescape($createdafter);
       } else {
           $createdafter = 0;
       }
       if ($creationcontext ne '') {
           $creationcontext = &unescape($creationcontext);
       } else {
           $creationcontext = '.';
       }
       unless ($hasuniquecode) {
           $hasuniquecode = '.';
       }
     my $unpack = 1;      my $unpack = 1;
     if ($description eq '.' && $instcodefilter eq '.' && $coursefilter eq '.' &&       if ($description eq '.' && $instcodefilter eq '.' && $ownerfilter eq '.' && 
         $typefilter eq '.') {          $typefilter eq '.') {
         $unpack = 0;          $unpack = 0;
     }      }
Line 3498  sub dump_course_id_handler { Line 4240  sub dump_course_id_handler {
     if ($hashref) {      if ($hashref) {
  while (my ($key,$value) = each(%$hashref)) {   while (my ($key,$value) = each(%$hashref)) {
             my ($unesc_key,$lasttime_key,$lasttime,$is_hash,%val,              my ($unesc_key,$lasttime_key,$lasttime,$is_hash,%val,
                 %unesc_val,$selfenroll_end,$selfenroll_types);                  %unesc_val,$selfenroll_end,$selfenroll_types,$created,
                   $context);
             $unesc_key = &unescape($key);              $unesc_key = &unescape($key);
             if ($unesc_key =~ /^lasttime:/) {              if ($unesc_key =~ /^lasttime:/) {
                 next;                  next;
Line 3509  sub dump_course_id_handler { Line 4252  sub dump_course_id_handler {
                 $lasttime = $hashref->{$lasttime_key};                  $lasttime = $hashref->{$lasttime_key};
                 next if ($lasttime<$since);                  next if ($lasttime<$since);
             }              }
               my ($canclone,$valchange);
             my $items = &Apache::lonnet::thaw_unescape($value);              my $items = &Apache::lonnet::thaw_unescape($value);
             if (ref($items) eq 'HASH') {              if (ref($items) eq 'HASH') {
                   if ($hashref->{$lasttime_key} eq '') {
                       next if ($since > 1);
                   }
                 $is_hash =  1;                  $is_hash =  1;
                   if ($domcloner) {
                       $canclone = 1;
                   } elsif (defined($clonerudom)) {
                       if ($items->{'cloners'}) {
                           my @cloneable = split(',',$items->{'cloners'});
                           if (@cloneable) {
                               if (grep(/^\*$/,@cloneable))  {
                                   $canclone = 1;
                               } elsif (grep(/^\*:\Q$clonerudom\E$/,@cloneable)) {
                                   $canclone = 1;
                               } elsif (grep(/^\Q$cloneruname\E:\Q$clonerudom\E$/,@cloneable)) {
                                   $canclone = 1;
                               }
                           }
                           unless ($canclone) {
                               if ($cloneruname ne '' && $clonerudom ne '') {
                                   if ($cc_clone{$unesc_key}) {
                                       $canclone = 1;
                                       $items->{'cloners'} .= ','.$cloneruname.':'.
                                                              $clonerudom;
                                       $valchange = 1;
                                   }
                               }
                           }
                       } elsif (defined($cloneruname)) {
                           if ($cc_clone{$unesc_key}) {
                               $canclone = 1;
                               $items->{'cloners'} = $cloneruname.':'.$clonerudom;
                               $valchange = 1;
                           }
                           unless ($canclone) {
                               if ($items->{'owner'} =~ /:/) {
                                   if ($items->{'owner'} eq $cloner) {
                                       $canclone = 1;
                                   }
                               } elsif ($cloner eq $items->{'owner'}.':'.$udom) {
                                   $canclone = 1;
                               }
                               if ($canclone) {
                                   $items->{'cloners'} = $cloneruname.':'.$clonerudom;
                                   $valchange = 1;
                               }
                           }
                       }
                   }
                 if ($unpack || !$rtn_as_hash) {                  if ($unpack || !$rtn_as_hash) {
                     $unesc_val{'descr'} = $items->{'description'};                      $unesc_val{'descr'} = $items->{'description'};
                     $unesc_val{'inst_code'} = $items->{'inst_code'};                      $unesc_val{'inst_code'} = $items->{'inst_code'};
                     $unesc_val{'owner'} = $items->{'owner'};                      $unesc_val{'owner'} = $items->{'owner'};
                     $unesc_val{'type'} = $items->{'type'};                      $unesc_val{'type'} = $items->{'type'};
                     $selfenroll_types = $items->{'selfenroll_types'};                      $unesc_val{'cloners'} = $items->{'cloners'};
                     $selfenroll_end = $items->{'selfenroll_end_date'};                      $unesc_val{'created'} = $items->{'created'};
                     if ($selfenrollonly) {                      $unesc_val{'context'} = $items->{'context'};
                         next if (!$selfenroll_types);                  }
                         if (($selfenroll_end > 0) && ($selfenroll_end <= $now)) {                  $selfenroll_types = $items->{'selfenroll_types'};
                             next;                  $selfenroll_end = $items->{'selfenroll_end_date'};
                   $created = $items->{'created'};
                   $context = $items->{'context'};
                   if ($hasuniquecode ne '.') {
                       next unless ($items->{'uniquecode'});
                   }
                   if ($selfenrollonly) {
                       next if (!$selfenroll_types);
                       if (($selfenroll_end > 0) && ($selfenroll_end <= $now)) {
                           next;
                       }
                   }
                   if ($creationcontext ne '.') {
                       next if (($context ne '') && ($context ne $creationcontext));  
                   }
                   if ($createdbefore > 0) {
                       next if (($created eq '') || ($created > $createdbefore));   
                   }
                   if ($createdafter > 0) {
                       next if (($created eq '') || ($created <= $createdafter)); 
                   }
                   if ($catfilter ne '') {
                       next if ($items->{'categories'} eq '');
                       my @categories = split('&',$items->{'categories'}); 
                       next if (@categories == 0);
                       my @subcats = split('&',$catfilter);
                       my $matchcat = 0;
                       foreach my $cat (@categories) {
                           if (grep(/^\Q$cat\E$/,@subcats)) {
                               $matchcat = 1;
                               last;
                         }                          }
                     }                      }
                       next if (!$matchcat);
                   }
                   if ($caller eq 'coursecatalog') {
                       if ($items->{'hidefromcat'} eq 'yes') {
                           next if !$showhidden;
                       }
                 }                  }
             } else {              } else {
                   next if ($catfilter ne '');
                   next if ($selfenrollonly);
                   next if ($createdbefore || $createdafter);
                   next if ($creationcontext ne '.');
                   if ((defined($clonerudom)) && (defined($cloneruname)))  {
                       if ($cc_clone{$unesc_key}) {
                           $canclone = 1;
                           $val{'cloners'} = &escape($cloneruname.':'.$clonerudom);
                       }
                   }
                 $is_hash =  0;                  $is_hash =  0;
                 my @courseitems = split(/:/,$value);                  my @courseitems = split(/:/,$value);
                 $lasttime = pop(@courseitems);                  $lasttime = pop(@courseitems);
                 next if ($lasttime<$since);                  if ($hashref->{$lasttime_key} eq '') {
                       next if ($lasttime<$since);
                   }
         ($val{'descr'},$val{'inst_code'},$val{'owner'},$val{'type'}) = @courseitems;          ($val{'descr'},$val{'inst_code'},$val{'owner'},$val{'type'}) = @courseitems;
             }              }
               if ($cloneonly) {
                  next unless ($canclone);
               }
             my $match = 1;              my $match = 1;
     if ($description ne '.') {      if ($description ne '.') {
                 if (!$is_hash) {                  if (!$is_hash) {
Line 3546  sub dump_course_id_handler { Line 4389  sub dump_course_id_handler {
                 if (!$is_hash) {                  if (!$is_hash) {
                     $unesc_val{'inst_code'} = &unescape($val{'inst_code'});                      $unesc_val{'inst_code'} = &unescape($val{'inst_code'});
                 }                  }
                 if ($regexp_ok) {                  if ($regexp_ok == 1) {
                     if (eval{$unesc_val{'inst_code'} !~ /$instcodefilter/}) {                      if (eval{$unesc_val{'inst_code'} !~ /$instcodefilter/}) {
                         $match = 0;                          $match = 0;
                     }                      }
                   } elsif ($regexp_ok == -1) {
                       if (eval{$unesc_val{'inst_code'} =~ /$instcodefilter/}) {
                           $match = 0;
                       }
                 } else {                  } else {
                     if (eval{$unesc_val{'inst_code'} !~ /\Q$instcodefilter\E/i}) {                      if (eval{$unesc_val{'inst_code'} !~ /\Q$instcodefilter\E/i}) {
                         $match = 0;                          $match = 0;
Line 3615  sub dump_course_id_handler { Line 4462  sub dump_course_id_handler {
             if ($match == 1) {              if ($match == 1) {
                 if ($rtn_as_hash) {                  if ($rtn_as_hash) {
                     if ($is_hash) {                      if ($is_hash) {
                         $qresult.=$key.'='.$value.'&';                          if ($valchange) {
                               my $newvalue = &Apache::lonnet::freeze_escape($items);
                               $qresult.=$key.'='.$newvalue.'&';
                           } else {
                               $qresult.=$key.'='.$value.'&';
                           }
                     } else {                      } else {
                         my %rtnhash = ( 'description' => &unescape($val{'descr'}),                          my %rtnhash = ( 'description' => &unescape($val{'descr'}),
                                         'inst_code' => &unescape($val{'inst_code'}),                                          'inst_code' => &unescape($val{'inst_code'}),
                                         'owner'     => &unescape($val{'owner'}),                                          'owner'     => &unescape($val{'owner'}),
                                         'type'      => &unescape($val{'type'}),                                          'type'      => &unescape($val{'type'}),
                                           'cloners'   => &unescape($val{'cloners'}),
                                       );                                        );
                         my $items = &Apache::lonnet::freeze_escape(\%rtnhash);                          my $items = &Apache::lonnet::freeze_escape(\%rtnhash);
                         $qresult.=$key.'='.$items.'&';                          $qresult.=$key.'='.$items.'&';
Line 3652  sub dump_course_id_handler { Line 4505  sub dump_course_id_handler {
 }  }
 &register_handler("courseiddump", \&dump_course_id_handler, 0, 1, 0);  &register_handler("courseiddump", \&dump_course_id_handler, 0, 1, 0);
   
   sub course_lastaccess_handler {
       my ($cmd, $tail, $client) = @_;
       my $userinput = "$cmd:$tail";
       my ($cdom,$cnum) = split(':',$tail); 
       my (%lastaccess,$qresult);
       my $hashref = &tie_domain_hash($cdom, "nohist_courseids", &GDBM_WRCREAT());
       if ($hashref) {
           while (my ($key,$value) = each(%$hashref)) {
               my ($unesc_key,$lasttime);
               $unesc_key = &unescape($key);
               if ($cnum) {
                   next unless ($unesc_key =~ /\Q$cdom\E_\Q$cnum\E$/);
               }
               if ($unesc_key =~ /^lasttime:($LONCAPA::match_domain\_$LONCAPA::match_courseid)/) {
                   $lastaccess{$1} = $value;
               } else {
                   my $items = &Apache::lonnet::thaw_unescape($value);
                   if (ref($items) eq 'HASH') {
                       unless ($lastaccess{$unesc_key}) {
                           $lastaccess{$unesc_key} = '';
                       }
                   } else {
                       my @courseitems = split(':',$value);
                       $lastaccess{$unesc_key} = pop(@courseitems);
                   }
               }
           }
           foreach my $cid (sort(keys(%lastaccess))) {
               $qresult.=&escape($cid).'='.$lastaccess{$cid}.'&'; 
           }
           if (&untie_domain_hash($hashref)) {
               if ($qresult) {
                   chop($qresult);
               }
               &Reply($client, \$qresult, $userinput);
           } else {
               &Failure($client, "error: ".($!+0)." untie(GDBM) Failed ".
                       "while attempting lastacourseaccess\n", $userinput);
           }
       } else {
           &Failure($client, "error: ".($!+0)." tie(GDBM) Failed ".
                   "while attempting lastcourseaccess\n", $userinput);
       }
       return 1;
   }
   &register_handler("courselastaccess",\&course_lastaccess_handler, 0, 1, 0);
   
 #  #
 # Puts an unencrypted entry in a namespace db file at the domain level   # Puts an unencrypted entry in a namespace db file at the domain level 
 #  #
Line 3695  sub put_domain_handler { Line 4595  sub put_domain_handler {
 }  }
 &register_handler("putdom", \&put_domain_handler, 0, 1, 0);  &register_handler("putdom", \&put_domain_handler, 0, 1, 0);
   
   # Updates one or more entries in clickers.db file at the domain level
   #
   # Parameters:
   #    $cmd      - The command that got us here.
   #    $tail     - Tail of the command (remaining parameters).
   #                In this case a colon separated list containing:
   #                (a) the domain for which we are updating the entries,
   #                (b) the action required -- add or del -- and
   #                (c) a &-separated list of entries to add or delete.
   #    $client   - File descriptor connected to client.
   # Returns
   #     1        - Continue processing.
   #     0        - Requested to exit, caller should shut down.
   #  Side effects:
   #     reply is written to $client.
   #
   
   
   sub update_clickers {
       my ($cmd, $tail, $client)  = @_;
   
       my $userinput = "$cmd:$tail";
       my ($udom,$action,$what) =split(/:/,$tail,3);
       chomp($what);
   
       my $hashref = &tie_domain_hash($udom, "clickers", &GDBM_WRCREAT(),
                                    "U","$action:$what");
   
       if (!$hashref) {
           &Failure( $client, "error: ".($!+0)." tie(GDBM) Failed ".
                     "while attempting updateclickers\n", $userinput);
           return 1;
       }
   
       my @pairs=split(/\&/,$what);
       foreach my $pair (@pairs) {
           my ($key,$value)=split(/=/,$pair);
           if ($action eq 'add') {
               if (exists($hashref->{$key})) {
                   my @newvals = split(/,/,&unescape($value));
                   my @currvals = split(/,/,&unescape($hashref->{$key}));
                   my @merged = sort(keys(%{{map { $_ => 1 } (@newvals,@currvals)}}));
                   $hashref->{$key}=&escape(join(',',@merged));
               } else {
                   $hashref->{$key}=$value;
               }
           } elsif ($action eq 'del') {
               if (exists($hashref->{$key})) {
                   my %current;
                   map { $current{$_} = 1; } split(/,/,&unescape($hashref->{$key}));
                   map { delete($current{$_}); } split(/,/,&unescape($value));
                   if (keys(%current)) {
                       $hashref->{$key}=&escape(join(',',sort(keys(%current))));
                   } else {
                       delete($hashref->{$key});
                   }
               }
           }
       }
       if (&untie_user_hash($hashref)) {
           &Reply( $client, "ok\n", $userinput);
       } else {
           &Failure($client, "error: ".($!+0)." untie(GDBM) failed ".
                    "while attempting put\n",
                    $userinput);
       }
       return 1;
   }
   &register_handler("updateclickers", \&update_clickers, 0, 1, 0);
   
   
   # Deletes one or more entries in a namespace db file at the domain level
   #
   # Parameters:
   #    $cmd      - The command that got us here.
   #    $tail     - Tail of the command (remaining parameters).
   #                In this case a colon separated list containing:
   #                (a) the domain for which we are deleting the entries,
   #                (b) &-separated list of keys to delete.  
   #    $client   - File descriptor connected to client.
   # Returns
   #     1        - Continue processing.
   #     0        - Requested to exit, caller should shut down.
   #  Side effects:
   #     reply is written to $client.
   #
   
   sub del_domain_handler {
       my ($cmd,$tail,$client) = @_;
   
       my $userinput = "$cmd:$tail";
   
       my ($udom,$namespace,$what)=split(/:/,$tail,3);
       chomp($what);
       my $hashref = &tie_domain_hash($udom,$namespace,&GDBM_WRCREAT(),
                                      "D", $what);
       if ($hashref) {
           my @keys=split(/\&/,$what);
           foreach my $key (@keys) {
               delete($hashref->{$key});
           }
           if (&untie_user_hash($hashref)) {
               &Reply($client, "ok\n", $userinput);
           } else {
               &Failure($client, "error: ".($!+0)." untie(GDBM) Failed ".
                       "while attempting deldom\n", $userinput);
           }
       } else {
           &Failure( $client, "error: ".($!+0)." tie(GDBM) Failed ".
                    "while attempting deldom\n", $userinput);
       }
       return 1;
   }
   &register_handler("deldom", \&del_domain_handler, 0, 1, 0);
   
   
 # Unencrypted get from the namespace database file at the domain level.  # Unencrypted get from the namespace database file at the domain level.
 # This function retrieves a keyed item from a specific named database in the  # This function retrieves a keyed item from a specific named database in the
 # domain directory.  # domain directory.
Line 3717  sub put_domain_handler { Line 4733  sub put_domain_handler {
 sub get_domain_handler {  sub get_domain_handler {
     my ($cmd, $tail, $client) = @_;      my ($cmd, $tail, $client) = @_;
   
   
     my $userinput = "$client:$tail";      my $userinput = "$client:$tail";
   
     my ($udom,$namespace,$what)=split(/:/,$tail,3);      my ($udom,$namespace,$what)=split(/:/,$tail,3);
Line 3744  sub get_domain_handler { Line 4761  sub get_domain_handler {
 }  }
 &register_handler("getdom", \&get_domain_handler, 0, 1, 0);  &register_handler("getdom", \&get_domain_handler, 0, 1, 0);
   
   
 #  #
 #  Puts an id to a domains id database.   #  Puts an id to a domains id database. 
 #  #
Line 3842  sub get_id_handler { Line 4858  sub get_id_handler {
 }  }
 &register_handler("idget", \&get_id_handler, 0, 1, 0);  &register_handler("idget", \&get_id_handler, 0, 1, 0);
   
   #   Deletes one or more ids in a domain's id database.
   #
   #   Parameters:
   #       $cmd                  - Command keyword (iddel).
   #       $tail                 - Command tail.  In this case a colon
   #                               separated list containing:
   #                               The domain for which we are deleting the id(s).
   #                               &-separated list of id(s) to delete.
   #       $client               - File open on client socket.
   # Returns:
   #     1   - Continue processing
   #     0   - Exit server.
   #     
   #
   
   sub del_id_handler {
       my ($cmd,$tail,$client) = @_;
   
       my $userinput = "$cmd:$tail";
   
       my ($udom,$what)=split(/:/,$tail);
       chomp($what);
       my $hashref = &tie_domain_hash($udom, "ids", &GDBM_WRCREAT(),
                                      "D", $what);
       if ($hashref) {
           my @keys=split(/\&/,$what);
           foreach my $key (@keys) {
               delete($hashref->{$key});
           }
           if (&untie_user_hash($hashref)) {
               &Reply($client, "ok\n", $userinput);
           } else {
               &Failure($client, "error: ".($!+0)." untie(GDBM) Failed ".
                       "while attempting iddel\n", $userinput);
           }
       } else {
           &Failure( $client, "error: ".($!+0)." tie(GDBM) Failed ".
                    "while attempting iddel\n", $userinput);
       }
       return 1;
   }
   &register_handler("iddel", \&del_id_handler, 0, 1, 0);
   
 #  #
 # Puts broadcast e-mail sent by Domain Coordinator in nohist_dcmail database   # Puts broadcast e-mail sent by Domain Coordinator in nohist_dcmail database 
 #  #
Line 3862  sub get_id_handler { Line 4921  sub get_id_handler {
 sub put_dcmail_handler {  sub put_dcmail_handler {
     my ($cmd,$tail,$client) = @_;      my ($cmd,$tail,$client) = @_;
     my $userinput = "$cmd:$tail";      my $userinput = "$cmd:$tail";
                                                                                   
   
     my ($udom,$what)=split(/:/,$tail);      my ($udom,$what)=split(/:/,$tail);
     chomp($what);      chomp($what);
     my $hashref = &tie_domain_hash($udom, "nohist_dcmail", &GDBM_WRCREAT());      my $hashref = &tie_domain_hash($udom, "nohist_dcmail", &GDBM_WRCREAT());
Line 4051  sub dump_domainroles_handler { Line 5111  sub dump_domainroles_handler {
         $rolesfilter=&unescape($rolesfilter);          $rolesfilter=&unescape($rolesfilter);
  @roles = split(/\&/,$rolesfilter);   @roles = split(/\&/,$rolesfilter);
     }      }
                                                                                              
     my $hashref = &tie_domain_hash($udom, "nohist_domainroles", &GDBM_WRCREAT());      my $hashref = &tie_domain_hash($udom, "nohist_domainroles", &GDBM_WRCREAT());
     if ($hashref) {      if ($hashref) {
         my $qresult = '';          my $qresult = '';
         while (my ($key,$value) = each(%$hashref)) {          while (my ($key,$value) = each(%$hashref)) {
             my $match = 1;              my $match = 1;
             my ($start,$end) = split(/:/,&unescape($value));              my ($end,$start) = split(/:/,&unescape($value));
             my ($trole,$uname,$udom,$runame,$rudom,$rsec) = split(/:/,&unescape($key));              my ($trole,$uname,$udom,$runame,$rudom,$rsec) = split(/:/,&unescape($key));
             unless ($startfilter eq '.' || !defined($startfilter)) {              unless (@roles < 1) {
                 if ($start >= $startfilter) {                  unless (grep/^\Q$trole\E$/,@roles) {
                     $match = 0;                      $match = 0;
                       next;
                 }                  }
             }              }
             unless ($endfilter eq '.' || !defined($endfilter)) {              unless ($startfilter eq '.' || !defined($startfilter)) {
                 if ($end <= $endfilter) {                  if ((defined($start)) && ($start >= $startfilter)) {
                     $match = 0;                      $match = 0;
                       next;
                 }                  }
             }              }
             unless (@roles < 1) {              unless ($endfilter eq '.' || !defined($endfilter)) {
                 unless (grep/^\Q$trole\E$/,@roles) {                  if ((defined($end)) && (($end > 0) && ($end <= $endfilter))) {
                     $match = 0;                      $match = 0;
                       next;
                 }                  }
             }              }
             if ($match == 1) {              if ($match == 1) {
Line 4123  sub tmp_put_handler { Line 5186  sub tmp_put_handler {
     }      }
     my ($id,$store);      my ($id,$store);
     $tmpsnum++;      $tmpsnum++;
     if ($context eq 'resetpw') {      if (($context eq 'resetpw') || ($context eq 'createaccount')) {
         $id = &md5_hex(&md5_hex(time.{}.rand().$$));          $id = &md5_hex(&md5_hex(time.{}.rand().$$));
     } else {      } else {
         $id = $$.'_'.$clientip.'_'.$tmpsnum;          $id = $$.'_'.$clientip.'_'.$tmpsnum;
Line 4358  sub enrollment_enabled_handler { Line 5421  sub enrollment_enabled_handler {
 }  }
 &register_handler("autorun", \&enrollment_enabled_handler, 0, 1, 0);  &register_handler("autorun", \&enrollment_enabled_handler, 0, 1, 0);
   
   #
   #   Validate an institutional code used for a LON-CAPA course.          
   #
   # Formal Parameters:
   #   $cmd          - The command request that got us dispatched.
   #   $tail         - The tail of the command.  In this case,
   #                   this is a colon separated set of words that will be split
   #                   into:
   #                        $dom      - The domain for which the check of 
   #                                    institutional course code will occur.
   #
   #                        $instcode - The institutional code for the course
   #                                    being requested, or validated for rights
   #                                    to request.
   #
   #                        $owner    - The course requestor (who will be the
   #                                    course owner, in the form username:domain
   #
   #   $client       - Socket open on the client.
   # Returns:
   #    1           - Indicating processing should continue.
   #
   sub validate_instcode_handler {
       my ($cmd, $tail, $client) = @_;
       my $userinput = "$cmd:$tail";
       my ($dom,$instcode,$owner) = split(/:/, $tail);
       $instcode = &unescape($instcode);
       $owner = &unescape($owner);
       my ($outcome,$description,$credits) = 
           &localenroll::validate_instcode($dom,$instcode,$owner);
       my $result = &escape($outcome).'&'.&escape($description).'&'.
                    &escape($credits);
       &Reply($client, \$result, $userinput);
   
       return 1;
   }
   &register_handler("autovalidateinstcode", \&validate_instcode_handler, 0, 1, 0);
   
 #   Get the official sections for which auto-enrollment is possible.  #   Get the official sections for which auto-enrollment is possible.
 #   Since the admin people won't know about 'unofficial sections'   #   Since the admin people won't know about 'unofficial sections' 
 #   we cannot auto-enroll on them.  #   we cannot auto-enroll on them.
Line 4404  sub get_sections_handler { Line 5505  sub get_sections_handler {
 sub validate_course_owner_handler {  sub validate_course_owner_handler {
     my ($cmd, $tail, $client)  = @_;      my ($cmd, $tail, $client)  = @_;
     my $userinput = "$cmd:$tail";      my $userinput = "$cmd:$tail";
     my ($inst_course_id, $owner, $cdom) = split(/:/, $tail);      my ($inst_course_id, $owner, $cdom, $coowners) = split(/:/, $tail);
       
     $owner = &unescape($owner);      $owner = &unescape($owner);
     my $outcome = &localenroll::new_course($inst_course_id,$owner,$cdom);      $coowners = &unescape($coowners);
       my $outcome = &localenroll::new_course($inst_course_id,$owner,$cdom,$coowners);
     &Reply($client, \$outcome, $userinput);      &Reply($client, \$outcome, $userinput);
   
   
Line 4514  sub create_auto_enroll_password_handler Line 5616  sub create_auto_enroll_password_handler
 &register_handler("autocreatepassword", \&create_auto_enroll_password_handler,   &register_handler("autocreatepassword", \&create_auto_enroll_password_handler, 
   0, 1, 0);    0, 1, 0);
   
   sub auto_export_grades_handler {
       my ($cmd, $tail, $client) = @_;
       my $userinput = "$cmd:$tail";
       my ($cdom,$cnum,$info,$data) = split(/:/,$tail);
       my $inforef = &Apache::lonnet::thaw_unescape($info);
       my $dataref = &Apache::lonnet::thaw_unescape($data);
       my ($outcome,$result);;
       eval {
           local($SIG{__DIE__})='DEFAULT';
           my %rtnhash;
           $outcome=&localenroll::export_grades($cdom,$cnum,$inforef,$dataref,\%rtnhash);
           if ($outcome eq 'ok') {
               foreach my $key (keys(%rtnhash)) {
                   $result .= &escape($key).'='.&Apache::lonnet::freeze_escape($rtnhash{$key}).'&';
               }
               $result =~ s/\&$//;
           }
       };
       if (!$@) {
           if ($outcome eq 'ok') {
               if ($cipher) {
                   my $cmdlength=length($result);
                   $result.="         ";
                   my $encresult='';
                   for (my $encidx=0;$encidx<=$cmdlength;$encidx+=8) {
                       $encresult.= unpack("H16",
                                           $cipher->encrypt(substr($result,
                                                                   $encidx,
                                                                   8)));
                   }
                   &Reply( $client, "enc:$cmdlength:$encresult\n", $userinput);
               } else {
                   &Failure( $client, "error:no_key\n", $userinput);
               }
           } else {
               &Reply($client, "$outcome\n", $userinput);
           }
       } else {
           &Failure($client,"export_error\n",$userinput);
       }
       return 1;
   }
   &register_handler("autoexportgrades", \&auto_export_grades_handler,
                     0, 1, 0);
   
 #   Retrieve and remove temporary files created by/during autoenrollment.  #   Retrieve and remove temporary files created by/during autoenrollment.
 #  #
 # Formal Parameters:  # Formal Parameters:
Line 4534  sub retrieve_auto_file_handler { Line 5681  sub retrieve_auto_file_handler {
     my ($filename)   = split(/:/, $tail);      my ($filename)   = split(/:/, $tail);
   
     my $source = $perlvar{'lonDaemons'}.'/tmp/'.$filename;      my $source = $perlvar{'lonDaemons'}.'/tmp/'.$filename;
     if ( (-e $source) && ($filename ne '') ) {  
       if ($filename =~m{/\.\./}) {
           &Failure($client, "refused\n", $userinput);
       } elsif ( (-e $source) && ($filename ne '') ) {
  my $reply = '';   my $reply = '';
  if (open(my $fh,$source)) {   if (open(my $fh,$source)) {
     while (<$fh>) {      while (<$fh>) {
Line 4561  sub retrieve_auto_file_handler { Line 5711  sub retrieve_auto_file_handler {
 }  }
 &register_handler("autoretrieve", \&retrieve_auto_file_handler, 0,1,0);  &register_handler("autoretrieve", \&retrieve_auto_file_handler, 0,1,0);
   
   sub crsreq_checks_handler {
       my ($cmd, $tail, $client) = @_;
       my $userinput = "$cmd:$tail";
       my $dom = $tail;
       my $result;
       my @reqtypes = ('official','unofficial','community','textbook','placement');
       eval {
           local($SIG{__DIE__})='DEFAULT';
           my %validations;
           my $response = &localenroll::crsreq_checks($dom,\@reqtypes,
                                                      \%validations);
           if ($response eq 'ok') { 
               foreach my $key (keys(%validations)) {
                   $result .= &escape($key).'='.&Apache::lonnet::freeze_escape($validations{$key}).'&';
               }
               $result =~ s/\&$//;
           } else {
               $result = 'error';
           }
       };
       if (!$@) {
           &Reply($client, \$result, $userinput);
       } else {
           &Failure($client,"unknown_cmd\n",$userinput);
       }
       return 1;
   }
   &register_handler("autocrsreqchecks", \&crsreq_checks_handler, 0, 1, 0);
   
   sub validate_crsreq_handler {
       my ($cmd, $tail, $client) = @_;
       my $userinput = "$cmd:$tail";
       my ($dom,$owner,$crstype,$inststatuslist,$instcode,$instseclist,$customdata) = split(/:/, $tail);
       $instcode = &unescape($instcode);
       $owner = &unescape($owner);
       $crstype = &unescape($crstype);
       $inststatuslist = &unescape($inststatuslist);
       $instcode = &unescape($instcode);
       $instseclist = &unescape($instseclist);
       my $custominfo = &Apache::lonnet::thaw_unescape($customdata);
       my $outcome;
       eval {
           local($SIG{__DIE__})='DEFAULT';
           $outcome = &localenroll::validate_crsreq($dom,$owner,$crstype,
                                                    $inststatuslist,$instcode,
                                                    $instseclist,$custominfo);
       };
       if (!$@) {
           &Reply($client, \$outcome, $userinput);
       } else {
           &Failure($client,"unknown_cmd\n",$userinput);
       }
       return 1;
   }
   &register_handler("autocrsreqvalidation", \&validate_crsreq_handler, 0, 1, 0);
   
   sub crsreq_update_handler {
       my ($cmd, $tail, $client) = @_;
       my $userinput = "$cmd:$tail";
       my ($cdom,$cnum,$crstype,$action,$ownername,$ownerdomain,$fullname,$title,$code,
           $accessstart,$accessend,$infohashref) =
           split(/:/, $tail);
       $crstype = &unescape($crstype);
       $action = &unescape($action);
       $ownername = &unescape($ownername);
       $ownerdomain = &unescape($ownerdomain);
       $fullname = &unescape($fullname);
       $title = &unescape($title);
       $code = &unescape($code);
       $accessstart = &unescape($accessstart);
       $accessend = &unescape($accessend);
       my $incoming = &Apache::lonnet::thaw_unescape($infohashref);
       my ($result,$outcome);
       eval {
           local($SIG{__DIE__})='DEFAULT';
           my %rtnhash;
           $outcome = &localenroll::crsreq_updates($cdom,$cnum,$crstype,$action,
                                                   $ownername,$ownerdomain,$fullname,
                                                   $title,$code,$accessstart,$accessend,
                                                   $incoming,\%rtnhash);
           if ($outcome eq 'ok') {
               my @posskeys = qw(createdweb createdmsg createdcustomized createdactions queuedweb queuedmsg formitems reviewweb validationjs onload javascript);
               foreach my $key (keys(%rtnhash)) {
                   if (grep(/^\Q$key\E/,@posskeys)) {
                       $result .= &escape($key).'='.&Apache::lonnet::freeze_escape($rtnhash{$key}).'&';
                   }
               }
               $result =~ s/\&$//;
           }
       };
       if (!$@) {
           if ($outcome eq 'ok') {
               &Reply($client, \$result, $userinput);
           } else {
               &Reply($client, "format_error\n", $userinput);
           }
       } else {
           &Failure($client,"unknown_cmd\n",$userinput);
       }
       return 1;
   }
   &register_handler("autocrsrequpdate", \&crsreq_update_handler, 0, 1, 0);
   
 #  #
 #   Read and retrieve institutional code format (for support form).  #   Read and retrieve institutional code format (for support form).
 # Formal Parameters:  # Formal Parameters:
Line 4645  sub get_institutional_defaults_handler { Line 5898  sub get_institutional_defaults_handler {
 &register_handler("autoinstcodedefaults",  &register_handler("autoinstcodedefaults",
                   \&get_institutional_defaults_handler,0,1,0);                    \&get_institutional_defaults_handler,0,1,0);
   
   sub get_possible_instcodes_handler {
       my ($cmd, $tail, $client)   = @_;
       my $userinput               = "$cmd:$tail";
   
       my $reply;
       my $cdom = $tail;
       my (@codetitles,%cat_titles,%cat_order,@code_order);
       my $formatreply = &localenroll::possible_instcodes($cdom,
                                                          \@codetitles,
                                                          \%cat_titles,
                                                          \%cat_order,
                                                          \@code_order);
       if ($formatreply eq 'ok') {
           my $result = join('&',map {&escape($_);} (@codetitles)).':';
           $result .= join('&',map {&escape($_);} (@code_order)).':';
           foreach my $key (keys(%cat_titles)) {
               $result .= &escape($key).'='.&Apache::lonnet::freeze_escape($cat_titles{$key}).'&';
           }
           $result =~ s/\&$//;
           $result .= ':';
           foreach my $key (keys(%cat_order)) {
               $result .= &escape($key).'='.&Apache::lonnet::freeze_escape($cat_order{$key}).'&';
           }
           $result =~ s/\&$//;
           &Reply($client,\$result,$userinput);
       } else {
           &Reply($client, "format_error\n", $userinput);
       }
       return 1;
   }
   &register_handler("autopossibleinstcodes",
                     \&get_possible_instcodes_handler,0,1,0);
   
 sub get_institutional_user_rules {  sub get_institutional_user_rules {
     my ($cmd, $tail, $client)   = @_;      my ($cmd, $tail, $client)   = @_;
     my $userinput               = "$cmd:$tail";      my $userinput               = "$cmd:$tail";
Line 5035  sub get_request { Line 6321  sub get_request {
 #  #
 # Parameters:  # Parameters:
 #    user_input   - The request received from the client (lonc).  #    user_input   - The request received from the client (lonc).
   #
 # Returns:  # Returns:
 #    true to keep processing, false if caller should exit.  #    true to keep processing, false if caller should exit.
 #  #
 sub process_request {  sub process_request {
     my ($userinput) = @_;      # Easier for now to break style than to      my ($userinput) = @_; # Easier for now to break style than to
                                 # fix all the userinput -> user_input.                            # fix all the userinput -> user_input.
     my $wasenc    = 0; # True if request was encrypted.      my $wasenc    = 0; # True if request was encrypted.
 # ------------------------------------------------------------ See if encrypted  # ------------------------------------------------------------ See if encrypted
     # for command      # for command
Line 5120  sub process_request { Line 6407  sub process_request {
     Debug("Client not privileged to do this operation");      Debug("Client not privileged to do this operation");
     $ok = 0;      $ok = 0;
  }   }
           if ($ok) {
               if (ref($trust{$command}) eq 'HASH') {
                   my $donechecks;
                   if ($trust{$command}{'anywhere'}) {
                      $donechecks = 1;
                   } elsif ($trust{$command}{'manageronly'}) {
                       unless (&isManager()) {
                           $ok = 0;
                       }
                       $donechecks = 1;
                   } elsif ($trust{$command}{'institutiononly'}) {
                       unless ($clientsameinst) {
                           $ok = 0;
                       }
                       $donechecks = 1;
                   } elsif ($clientsameinst) {
                       $donechecks = 1;
                   }
                   unless ($donechecks) {
                       foreach my $rule (keys(%{$trust{$command}})) {
                           next if ($rule eq 'remote');
                           if ($trust{$command}{$rule}) {
                               if ($clientprohibited{$rule}) {
                                   $ok = 0;
                               } else {
                                   $ok = 1;
                                   $donechecks = 1;
                                   last;
                               }
                           }
                       }
                   }
                   unless ($donechecks) {
                       if ($trust{$command}{'remote'}) {
                           if ($clientremoteok) {
                               $ok = 1;
                           } else {
                               $ok = 0;
                           } 
                       }
                   }
               }
           }
   
  if($ok) {   if($ok) {
     Debug("Dispatching to handler $command $tail");      Debug("Dispatching to handler $command $tail");
Line 5130  sub process_request { Line 6460  sub process_request {
     Failure($client, "refused\n", $userinput);      Failure($client, "refused\n", $userinput);
     return 1;      return 1;
  }   }
       }
     }      
   
     print $client "unknown_cmd\n";      print $client "unknown_cmd\n";
 # -------------------------------------------------------------------- complete  # -------------------------------------------------------------------- complete
Line 5235  sub lcpasswdstrerror { Line 6564  sub lcpasswdstrerror {
     }      }
 }  }
   
 #  
 # Convert an error return code from lcuseradd to a string value:  
 #  
 sub lcuseraddstrerror {  
     my $ErrorCode = shift;  
     if(($ErrorCode < 0) || ($ErrorCode > $lastadderror)) {  
  return "lcuseradd - Unrecognized error code: ".$ErrorCode;  
     } else {  
  return $adderrors[$ErrorCode];  
     }  
 }  
   
 # grabs exception and records it to log before exiting  # grabs exception and records it to log before exiting
 sub catchexception {  sub catchexception {
     my ($error)=@_;      my ($error)=@_;
Line 5307  if (-e $pidfile) { Line 6624  if (-e $pidfile) {
 $server = IO::Socket::INET->new(LocalPort => $perlvar{'londPort'},  $server = IO::Socket::INET->new(LocalPort => $perlvar{'londPort'},
                                 Type      => SOCK_STREAM,                                  Type      => SOCK_STREAM,
                                 Proto     => 'tcp',                                  Proto     => 'tcp',
                                 Reuse     => 1,                                  ReuseAddr     => 1,
                                 Listen    => 10 )                                  Listen    => 10 )
   or die "making socket: $@\n";    or die "making socket: $@\n";
   
Line 5370  sub HUPSMAN {                      # sig Line 6687  sub HUPSMAN {                      # sig
 #  a setuid perl script that can be root for us to do this job.  #  a setuid perl script that can be root for us to do this job.
 #  #
 sub ReloadApache {  sub ReloadApache {
     my $execdir = $perlvar{'lonDaemons'};  # --------------------------- Handle case of another apachereload process (locking)
     my $script  = $execdir."/apachereload";      if (&LONCAPA::try_to_lock('/tmp/lock_apachereload')) {
     system($script);          my $execdir = $perlvar{'lonDaemons'};
           my $script  = $execdir."/apachereload";
           system($script);
           unlink('/tmp/lock_apachereload'); #  Remove the lock file.
       }
 }  }
   
 #  #
Line 5483  sub Debug { Line 6804  sub Debug {
 #     reply   - Text to send to client.  #     reply   - Text to send to client.
 #     request - Original request from client.  #     request - Original request from client.
 #  #
   #NOTE $reply must be terminated by exactly *one* \n. If $reply is a reference
   #this is done automatically ($$reply must not contain any \n in this case). 
   #If $reply is a string the caller has to ensure this.
 sub Reply {  sub Reply {
     my ($fd, $reply, $request) = @_;      my ($fd, $reply, $request) = @_;
     if (ref($reply)) {      if (ref($reply)) {
Line 5545  sub logstatus { Line 6869  sub logstatus {
 sub initnewstatus {  sub initnewstatus {
     my $docdir=$perlvar{'lonDocRoot'};      my $docdir=$perlvar{'lonDocRoot'};
     my $fh=IO::File->new(">$docdir/lon-status/londstatus.txt");      my $fh=IO::File->new(">$docdir/lon-status/londstatus.txt");
     my $now=time;      my $now=time();
     my $local=localtime($now);      my $local=localtime($now);
     print $fh "LOND status $local - parent $$\n\n";      print $fh "LOND status $local - parent $$\n\n";
     opendir(DIR,"$docdir/lon-status/londchld");      opendir(DIR,"$docdir/lon-status/londchld");
Line 5634  $SIG{USR2} = \&UpdateHosts; Line 6958  $SIG{USR2} = \&UpdateHosts;
   
 #  Read the host hashes:  #  Read the host hashes:
 &Apache::lonnet::load_hosts_tab();  &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);
   if ($arch eq 'unknown') {
       $arch = `uname -m`;
       chomp($arch);
   }
   
 # --------------------------------------------------------------  # --------------------------------------------------------------
 #   Accept connections.  When a connection comes in, it is validated  #   Accept connections.  When a connection comes in, it is validated
Line 5694  sub make_new_child { Line 7026  sub make_new_child {
             or die "Can't unblock SIGINT for fork: $!\n";              or die "Can't unblock SIGINT for fork: $!\n";
         $children{$pid} = $clientip;          $children{$pid} = $clientip;
         &status('Started child '.$pid);          &status('Started child '.$pid);
    close($client);
         return;          return;
     } else {      } else {
         # Child can *not* return from this subroutine.          # Child can *not* return from this subroutine.
Line 5702  sub make_new_child { Line 7035  sub make_new_child {
                                 #don't get intercepted                                  #don't get intercepted
         $SIG{USR1}= \&logstatus;          $SIG{USR1}= \&logstatus;
         $SIG{ALRM}= \&timeout;          $SIG{ALRM}= \&timeout;
    #
    # Block sigpipe as it gets thrownon socket disconnect and we want to 
    # deal with that as a read faiure instead.
    #
    my $blockset = POSIX::SigSet->new(SIGPIPE);
    sigprocmask(SIG_BLOCK, $blockset);
   
         $lastlog='Forked ';          $lastlog='Forked ';
         $status='Forked';          $status='Forked';
   
Line 5712  sub make_new_child { Line 7052  sub make_new_child {
 #        my $tmpsnum=0;            # Now global  #        my $tmpsnum=0;            # Now global
 #---------------------------------------------------- kerberos 5 initialization  #---------------------------------------------------- kerberos 5 initialization
         &Authen::Krb5::init_context();          &Authen::Krb5::init_context();
  unless (($dist eq 'fedora5') || ($dist eq 'fedora4') ||    
  ($dist eq 'fedora6') || ($dist eq 'suse9.3')) {          my $no_ets;
           if ($dist =~ /^(?:centos|rhes|scientific)(\d+)$/) {
               if ($1 >= 7) {
                   $no_ets = 1;
               }
           } elsif ($dist =~ /^suse(\d+\.\d+)$/) {
               if (($1 eq '9.3') || ($1 >= 12.2)) {
                   $no_ets = 1; 
               }
           } elsif ($dist =~ /^sles(\d+)$/) {
               if ($1 > 11) {
                   $no_ets = 1;
               }
           } elsif ($dist =~ /^fedora(\d+)$/) {
               if ($1 < 7) {
                   $no_ets = 1;
               }
           }
           unless ($no_ets) {
     &Authen::Krb5::init_ets();      &Authen::Krb5::init_ets();
  }   }
   
Line 5727  sub make_new_child { Line 7085  sub make_new_child {
  if ($clientip eq '127.0.0.1') {   if ($clientip eq '127.0.0.1') {
     $outsideip=&Apache::lonnet::get_host_ip($perlvar{'lonHostID'});      $outsideip=&Apache::lonnet::get_host_ip($perlvar{'lonHostID'});
  }   }
    &ReadManagerTable();
  my $clientrec=defined(&Apache::lonnet::get_hosts_from_ip($outsideip));   my $clientrec=defined(&Apache::lonnet::get_hosts_from_ip($outsideip));
  my $ismanager=($managers{$outsideip}    ne undef);   my $ismanager=($managers{$outsideip}    ne undef);
  $clientname  = "[unknonwn]";   $clientname  = "[unknown]";
  if($clientrec) { # Establish client type.   if($clientrec) { # Establish client type.
     $ConnectionType = "client";      $ConnectionType = "client";
     $clientname = (&Apache::lonnet::get_hosts_from_ip($outsideip))[-1];      $clientname = (&Apache::lonnet::get_hosts_from_ip($outsideip))[-1];
Line 5758  sub make_new_child { Line 7116  sub make_new_child {
  #   #
  #  If the remote is attempting a local init... give that a try:   #  If the remote is attempting a local init... give that a try:
  #   #
  my ($i, $inittype) = split(/:/, $remotereq);   (my $i, my $inittype, $clientversion) = split(/:/, $remotereq);
           # 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.            
           # $clientversion contains path to keyfile if $inittype eq 'local'
           # it's overridden below in this case
           $clientversion ||= $Apache::lonnet::loncaparevs{$clientname};
   
  # If the connection type is ssl, but I didn't get my   # If the connection type is ssl, but I didn't get my
  # certificate files yet, then I'll drop  back to    # certificate files yet, then I'll drop  back to 
Line 5778  sub make_new_child { Line 7142  sub make_new_child {
  }   }
   
  if($inittype eq "local") {   if($inittype eq "local") {
                       $clientversion = $perlvar{'lonVersion'};
     my $key = LocalConnection($client, $remotereq);      my $key = LocalConnection($client, $remotereq);
     if($key) {      if($key) {
  Debug("Got local key $key");   Debug("Got local key $key");
Line 5785  sub make_new_child { Line 7150  sub make_new_child {
  my $cipherkey = pack("H32", $key);   my $cipherkey = pack("H32", $key);
  $cipher       = new IDEA($cipherkey);   $cipher       = new IDEA($cipherkey);
  print $client "ok:local\n";   print $client "ok:local\n";
  &logthis('<font color="green"'   &logthis('<font color="green">'
  . "Successful local authentication </font>");   . "Successful local authentication </font>");
  $keymode = "local"   $keymode = "local"
     } else {      } else {
Line 5849  sub make_new_child { Line 7214  sub make_new_child {
 # ------------------------------------------------------------ Process requests  # ------------------------------------------------------------ Process requests
     my $keep_going = 1;      my $keep_going = 1;
     my $user_input;      my $user_input;
               my $clienthost = &Apache::lonnet::hostname($clientname);
               my $clientserverhomeID = &Apache::lonnet::get_server_homeID($clienthost);
               $clienthomedom = &Apache::lonnet::host_domain($clientserverhomeID);
               $clientintdom = &Apache::lonnet::internet_dom($clientserverhomeID);
               $clientsameinst = 0;
               if ($clientintdom ne '') {
                   my $internet_names = &Apache::lonnet::get_internet_names($currenthostid);
                   if (ref($internet_names) eq 'ARRAY') {
                       if (grep(/^\Q$clientintdom\E$/,@{$internet_names})) {
                           $clientsameinst = 1;
                       }
                   }
               }
               $clientremoteok = 0;
               unless ($clientsameinst) {
                   $clientremoteok = 1;
                   my $defdom = &Apache::lonnet::host_domain($perlvar{'lonHostID'});
                   %clientprohibited = &get_prohibited($defdom);
                   if ($clientintdom) {
                       my $remsessconf = &get_usersession_config($defdom,'remotesession');
                       if (ref($remsessconf) eq 'HASH') {
                           if (ref($remsessconf->{'remote'}) eq 'HASH') {
                               if (ref($remsessconf->{'remote'}->{'excludedomain'}) eq 'ARRAY') {
                                   if (grep(/^\Q$clientintdom\E$/,@{$remsessconf->{'remote'}->{'excludedomain'}})) {
                                       $clientremoteok = 0;
                                   }
                               }
                               if (ref($remsessconf->{'remote'}->{'includedomain'}) eq 'ARRAY') {
                                   if (grep(/^\Q$clientintdom\E$/,@{$remsessconf->{'remote'}->{'includedomain'}})) {
                                       $clientremoteok = 1;
                                   } else {
                                       $clientremoteok = 0;
                                   }
                               }
                           }
                       }
                   }
               }
     while(($user_input = get_request) && $keep_going) {      while(($user_input = get_request) && $keep_going) {
  alarm(120);   alarm(120);
  Debug("Main: Got $user_input\n");   Debug("Main: Got $user_input\n");
Line 5864  sub make_new_child { Line 7267  sub make_new_child {
     &logthis("<font color='blue'>WARNING: "      &logthis("<font color='blue'>WARNING: "
      ."Rejected client $clientip, closing connection</font>");       ."Rejected client $clientip, closing connection</font>");
  }   }
     }                  }
           
 # =============================================================================  # =============================================================================
           
Line 5898  sub is_author { Line 7301  sub is_author {
   
     #  Author role should show up as a key /domain/_au      #  Author role should show up as a key /domain/_au
   
     my $key    = "/$domain/_au";  
     my $value;      my $value;
     if (defined($hashref)) {      if ($hashref) {
  $value = $hashref->{$key};  
     }  
   
     if(defined($value)) {   my $key    = "/$domain/_au";
  &Debug("$user @ $domain is an author");   if (defined($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($value);      return defined($value);
 }  }
 #  #
 #   Checks to see if the input roleput request was to set  #   Checks to see if the input roleput request was to set
 # an author role.  If so, invokes the lchtmldir script to set  # an author role.  If so, creates construction space 
 # up a correct public_html   
 # Parameters:  # Parameters:
 #    request   - The request sent to the rolesput subchunk.  #    request   - The request sent to the rolesput subchunk.
 #                We're looking for  /domain/_au  #                We're looking for  /domain/_au
Line 5923  sub is_author { Line 7333  sub is_author {
 #  #
 sub manage_permissions {  sub manage_permissions {
     my ($request, $domain, $user, $authtype) = @_;      my ($request, $domain, $user, $authtype) = @_;
   
     &Debug("manage_permissions: $request $domain $user $authtype");  
   
     # See if the request is of the form /$domain/_au      # See if the request is of the form /$domain/_au
     if($request =~ /^(\/\Q$domain\E\/_au)$/) { # It's an author rolesput...      if($request =~ /^(\/\Q$domain\E\/_au)$/) { # It's an author rolesput...
  my $execdir = $perlvar{'lonDaemons'};          my $path=$perlvar{'lonDocRoot'}."/priv/$domain";
  my $userhome= "/home/$user" ;          unless (-e $path) {        
  &logthis("system $execdir/lchtmldir $userhome $user $authtype");             mkdir($path);
  &Debug("Setting homedir permissions for $userhome");          }
  system("$execdir/lchtmldir $userhome $user $authtype");          unless (-e $path.'/'.$user) {
              mkdir($path.'/'.$user);
           }
     }      }
 }  }
   
Line 6007  sub rewrite_password_file { Line 7416  sub rewrite_password_file {
   
 #     Returns the authorization type or nouser if there is no such user.  #     Returns the authorization type or nouser if there is no such user.
 #  #
 sub get_auth_type   sub get_auth_type {
 {  
   
     my ($domain, $user)  = @_;      my ($domain, $user)  = @_;
   
     Debug("get_auth_type( $domain, $user ) \n");      Debug("get_auth_type( $domain, $user ) \n");
Line 6084  sub validate_user { Line 7491  sub validate_user {
     }       } 
     if ($howpwd ne 'nouser') {      if ($howpwd ne 'nouser') {
  if($howpwd eq "internal") { # Encrypted is in local password file.   if($howpwd eq "internal") { # Encrypted is in local password file.
     $validated = (crypt($password, $contentpwd) eq $contentpwd);              if (length($contentpwd) == 13) {
                   $validated = (crypt($password,$contentpwd) eq $contentpwd);
                   if ($validated) {
                       my $ncpass = &hash_passwd($domain,$password);
                       if (&rewrite_password_file($domain,$user,"$howpwd:$ncpass")) {
                           &update_passwd_history($user,$domain,$howpwd,'conversion');
                           &logthis("Validated password hashed with bcrypt for $user:$domain");
                       }
                   }
               } else {
                   $validated = &check_internal_passwd($password,$contentpwd,$domain);
               }
  }   }
  elsif ($howpwd eq "unix") { # User is a normal unix user.   elsif ($howpwd eq "unix") { # User is a normal unix user.
     $contentpwd = (getpwnam($user))[1];      $contentpwd = (getpwnam($user))[1];
Line 6104  sub validate_user { Line 7522  sub validate_user {
     } else {      } else {
  $validated = 0;   $validated = 0;
     }      }
  }   } elsif ($howpwd eq "krb4") { # user is in kerberos 4 auth. domain.
  elsif ($howpwd eq "krb4") { # user is in kerberos 4 auth. domain.              my $checkwithkrb5 = 0;
     if(! ($password =~ /$null/) ) {              if ($dist =~/^fedora(\d+)$/) {
  my $k4error = &Authen::Krb4::get_pw_in_tkt($user,                  if ($1 > 11) {
    "",                      $checkwithkrb5 = 1;
    $contentpwd,,                  }
    'krbtgt',              } elsif ($dist =~ /^suse([\d.]+)$/) {
    $contentpwd,                  if ($1 > 11.1) {
    1,                      $checkwithkrb5 = 1; 
    $password);                  }
  if(!$k4error) {              }
     $validated = 1;              if ($checkwithkrb5) {
  } else {                  $validated = &krb5_authen($password,$null,$user,$contentpwd);
     $validated = 0;              } else {
     &logthis('krb4: '.$user.', '.$contentpwd.', '.                  $validated = &krb4_authen($password,$null,$user,$contentpwd);
      &Authen::Krb4::get_err_txt($Authen::Krb4::error));              }
  }  
     } else {  
  $validated = 0; # Password has a match with null.  
     }  
  } elsif ($howpwd eq "krb5") { # User is in kerberos 5 auth. domain.   } elsif ($howpwd eq "krb5") { # User is in kerberos 5 auth. domain.
     if(!($password =~ /$null/)) { # Null password not allowed.              $validated = &krb5_authen($password,$null,$user,$contentpwd);
  my $krbclient = &Authen::Krb5::parse_name($user.'@'  
   .$contentpwd);  
  my $krbservice = "krbtgt/".$contentpwd."\@".$contentpwd;  
  my $krbserver  = &Authen::Krb5::parse_name($krbservice);  
  my $credentials= &Authen::Krb5::cc_default();  
  $credentials->initialize(&Authen::Krb5::parse_name($user.'@'  
                                                                  .$contentpwd));  
                 my $krbreturn;  
                 if (exists(&Authen::Krb5::get_init_creds_password)) {  
                     $krbreturn =   
                         &Authen::Krb5::get_init_creds_password($krbclient,$password,  
                                                                $krbservice);  
                     $validated = (ref($krbreturn) eq 'Authen::Krb5::Creds');  
                 } else {  
     $krbreturn  =   
                         &Authen::Krb5::get_in_tkt_with_password($krbclient,$krbserver,  
  $password,$credentials);  
     $validated = ($krbreturn == 1);  
                 }  
  if (!$validated) {  
     &logthis('krb5: '.$user.', '.$contentpwd.', '.  
      &Authen::Krb5::error());  
  }  
     } else {  
  $validated = 0;  
     }  
  } elsif ($howpwd eq "localauth") {    } elsif ($howpwd eq "localauth") { 
     #  Authenticate via installation specific authentcation method:      #  Authenticate via installation specific authentcation method:
     $validated = &localauth::localauth($user,       $validated = &localauth::localauth($user, 
Line 6182  sub validate_user { Line 7570  sub validate_user {
     return $validated;      return $validated;
 }  }
   
   sub check_internal_passwd {
       my ($plainpass,$stored,$domain) = @_;
       my (undef,$method,@rest) = split(/!/,$stored);
       if ($method eq "bcrypt") {
           my $result = &hash_passwd($domain,$plainpass,@rest);
           if ($result ne $stored) {
               return 0;
           }
           # Upgrade to a larger number of rounds if necessary
           my $defaultcost;
           my %domconfig =
               &Apache::lonnet::get_dom('configuration',['password'],$domain);
           if (ref($domconfig{'password'}) eq 'HASH') {
               $defaultcost = $domconfig{'password'}{'cost'};
           }
           if (($defaultcost eq '') || ($defaultcost =~ /D/)) {
               $defaultcost = 10;
           }
           return 1 unless($rest[0]<$defaultcost);
       }
       return 0;
   }
   
   sub get_last_authchg {
       my ($domain,$user) = @_;
       my $lastmod;
       my $logname = &propath($domain,$user).'/passwd.log';
       if (-e "$logname") {
           $lastmod = (stat("$logname"))[9];
       }
       return $lastmod;
   }
   
   sub krb4_authen {
       my ($password,$null,$user,$contentpwd) = @_;
       my $validated = 0;
       if (!($password =~ /$null/) ) {  # Null password not allowed.
           eval {
               require Authen::Krb4;
           };
           if (!$@) {
               my $k4error = &Authen::Krb4::get_pw_in_tkt($user,
                                                          "",
                                                          $contentpwd,,
                                                          'krbtgt',
                                                          $contentpwd,
                                                          1,
                                                          $password);
               if(!$k4error) {
                   $validated = 1;
               } else {
                   $validated = 0;
                   &logthis('krb4: '.$user.', '.$contentpwd.', '.
                             &Authen::Krb4::get_err_txt($Authen::Krb4::error));
               }
           } else {
               $validated = krb5_authen($password,$null,$user,$contentpwd);
           }
       }
       return $validated;
   }
   
   sub krb5_authen {
       my ($password,$null,$user,$contentpwd) = @_;
       my $validated = 0;
       if(!($password =~ /$null/)) { # Null password not allowed.
           my $krbclient = &Authen::Krb5::parse_name($user.'@'
                                                     .$contentpwd);
           my $krbservice = "krbtgt/".$contentpwd."\@".$contentpwd;
           my $krbserver  = &Authen::Krb5::parse_name($krbservice);
           my $credentials= &Authen::Krb5::cc_default();
           $credentials->initialize(&Authen::Krb5::parse_name($user.'@'
                                                               .$contentpwd));
           my $krbreturn;
           if (exists(&Authen::Krb5::get_init_creds_password)) {
               $krbreturn =
                   &Authen::Krb5::get_init_creds_password($krbclient,$password,
                                                             $krbservice);
               $validated = (ref($krbreturn) eq 'Authen::Krb5::Creds');
           } else {
               $krbreturn  =
                   &Authen::Krb5::get_in_tkt_with_password($krbclient,$krbserver,
                                                            $password,$credentials);
               $validated = ($krbreturn == 1);
           }
           if (!$validated) {
               &logthis('krb5: '.$user.', '.$contentpwd.', '.
                        &Authen::Krb5::error());
           }
       }
       return $validated;
   }
   
 sub addline {  sub addline {
     my ($fname,$hostid,$ip,$newline)=@_;      my ($fname,$hostid,$ip,$newline)=@_;
Line 6394  sub subscribe { Line 7874  sub subscribe {
                 # the metadata                  # the metadata
  unless ($fname=~/\.meta$/) { &unsub("$fname.meta",$clientip); }   unless ($fname=~/\.meta$/) { &unsub("$fname.meta",$clientip); }
  $fname=~s/\/home\/httpd\/html\/res/raw/;   $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";   $result="$fname\n";
     }      }
  } else {   } else {
Line 6436  sub change_unix_password { Line 7918  sub change_unix_password {
   
   
 sub make_passwd_file {  sub make_passwd_file {
     my ($uname, $umode,$npass,$passfilename)=@_;      my ($uname,$udom,$umode,$npass,$passfilename,$action)=@_;
     my $result="ok";      my $result="ok";
     if ($umode eq 'krb4' or $umode eq 'krb5') {      if ($umode eq 'krb4' or $umode eq 'krb5') {
  {   {
     my $pf = IO::File->new(">$passfilename");      my $pf = IO::File->new(">$passfilename");
     if ($pf) {      if ($pf) {
  print $pf "$umode:$npass\n";   print $pf "$umode:$npass\n";
                   &update_passwd_history($uname,$udom,$umode,$action);
     } else {      } else {
  $result = "pass_file_failed_error";   $result = "pass_file_failed_error";
     }      }
  }   }
     } elsif ($umode eq 'internal') {      } elsif ($umode eq 'internal') {
  my $salt=time;          my $ncpass = &hash_passwd($udom,$npass);
  $salt=substr($salt,6,2);  
  my $ncpass=crypt($npass,$salt);  
  {   {
     &Debug("Creating internal auth");      &Debug("Creating internal auth");
     my $pf = IO::File->new(">$passfilename");      my $pf = IO::File->new(">$passfilename");
     if($pf) {      if($pf) {
  print $pf "internal:$ncpass\n";    print $pf "internal:$ncpass\n";
                   &update_passwd_history($uname,$udom,$umode,$action); 
     } else {      } else {
  $result = "pass_file_failed_error";   $result = "pass_file_failed_error";
     }      }
Line 6465  sub make_passwd_file { Line 7947  sub make_passwd_file {
     my $pf = IO::File->new(">$passfilename");      my $pf = IO::File->new(">$passfilename");
     if($pf) {      if($pf) {
  print $pf "localauth:$npass\n";   print $pf "localauth:$npass\n";
                   &update_passwd_history($uname,$udom,$umode,$action);
     } else {      } else {
  $result = "pass_file_failed_error";   $result = "pass_file_failed_error";
     }      }
  }   }
     } elsif ($umode eq 'unix') {      } elsif ($umode eq 'unix') {
  {   &logthis(">>>Attempt to create unix account blocked -- unix auth not available for new users.");
     #   $result="no_new_unix_accounts";
     #  Don't allow the creation of privileged accounts!!! that would  
     #  be real bad!!!  
     #  
     my $uid = getpwnam($uname);  
     if((defined $uid) && ($uid == 0)) {  
  &logthis(">>>Attempted to create privilged account blocked");  
  return "no_priv_account_error\n";  
     }  
   
     my $execpath       ="$perlvar{'lonDaemons'}/"."lcuseradd";  
   
     my $lc_error_file  = $execdir."/tmp/lcuseradd".$$.".status";  
     {  
  &Debug("Executing external: ".$execpath);  
  &Debug("user  = ".$uname.", Password =". $npass);  
  my $se = IO::File->new("|$execpath > $perlvar{'lonDaemons'}/logs/lcuseradd.log");  
  print $se "$uname\n";  
  print $se "$npass\n";  
  print $se "$npass\n";  
  print $se "$lc_error_file\n"; # Status -> unique file.  
     }  
     if (-r $lc_error_file) {  
  &Debug("Opening error file: $lc_error_file");  
  my $error = IO::File->new("< $lc_error_file");  
  my $useraddok = <$error>;  
  $error->close;  
  unlink($lc_error_file);  
   
  chomp $useraddok;  
   
  if($useraddok > 0) {  
     my $error_text = &lcuseraddstrerror($useraddok);  
     &logthis("Failed lcuseradd: $error_text");  
     $result = "lcuseradd_failed:$error_text";  
  }  else {  
     my $pf = IO::File->new(">$passfilename");  
     if($pf) {  
  print $pf "unix:\n";  
     } else {  
  $result = "pass_file_failed_error";  
     }  
  }  
     }  else {  
  &Debug("Could not locate lcuseradd error: $lc_error_file");  
  $result="bug_lcuseradd_no_output_file";  
     }  
  }  
     } elsif ($umode eq 'none') {      } elsif ($umode eq 'none') {
  {   {
     my $pf = IO::File->new("> $passfilename");      my $pf = IO::File->new("> $passfilename");
Line 6552  sub sethost { Line 7988  sub sethost {
  eq &Apache::lonnet::get_host_ip($hostid)) {   eq &Apache::lonnet::get_host_ip($hostid)) {
  $currenthostid  =$hostid;   $currenthostid  =$hostid;
  $currentdomainid=&Apache::lonnet::host_domain($hostid);   $currentdomainid=&Apache::lonnet::host_domain($hostid);
  &logthis("Setting hostid to $hostid, and domain to $currentdomainid");  # &logthis("Setting hostid to $hostid, and domain to $currentdomainid");
     } else {      } else {
  &logthis("Requested host id $hostid not an alias of ".   &logthis("Requested host id $hostid not an alias of ".
  $perlvar{'lonHostID'}." refusing connection");   $perlvar{'lonHostID'}." refusing connection");
Line 6567  sub version { Line 8003  sub version {
     return "version:$VERSION";      return "version:$VERSION";
 }  }
   
   sub get_usersession_config {
       my ($dom,$name) = @_;
       my ($usersessionconf,$cached)=&Apache::lonnet::is_cached_new($name,$dom);
       if (defined($cached)) {
           return $usersessionconf;
       } else {
           my %domconfig = &Apache::lonnet::get_dom('configuration',['usersessions'],$dom);
           &Apache::lonnet::do_cache_new($name,$dom,$domconfig{'usersessions'},3600);
           return $domconfig{'usersessions'};
       }
       return;
   }
   
   sub get_prohibited {
       my ($dom) = @_;
       my $name = 'trust';
       my ($trustconfig,$cached)=&Apache::lonnet::is_cached_new($name,$dom);
       unless (defined($cached)) {
           my %domconfig = &Apache::lonnet::get_dom('configuration',['trust'],$dom);
           &Apache::lonnet::do_cache_new($name,$dom,$domconfig{'trust'},3600);
           $trustconfig = $domconfig{'trust'};
       }
       my %prohibited;
       if (ref($trustconfig)) {
           foreach my $prefix (keys(%{$trustconfig})) {
               if (ref($trustconfig->{$prefix}) eq 'HASH') {
                   my $reject;
                   if (ref($trustconfig->{$prefix}->{'exc'}) eq 'ARRAY') {
                       if (grep(/^\Q$clientintdom\E$/,@{$trustconfig->{$prefix}->{'exc'}})) {
                           $reject = 1;
                       }
                   }
                   if (ref($trustconfig->{$prefix}->{'inc'}) eq 'ARRAY') {
                       if (grep(/^\Q$clientintdom\E$/,@{$trustconfig->{$prefix}->{'inc'}})) {
                           $reject = 0;
                       } else {
                           $reject = 1;
                       }
                   }
                   if ($reject) {
                       $prohibited{$prefix} = 1;
                   }
               }
           }
       }
       return %prohibited;
   }
   
   sub distro_and_arch {
       return $dist.':'.$arch;
   }
   
 # ----------------------------------- POD (plain old documentation, CPAN style)  # ----------------------------------- POD (plain old documentation, CPAN style)
   
Line 6747  Allow for a password to be set. Line 8234  Allow for a password to be set.
   
 Make a user.  Make a user.
   
 =item passwd  =item changeuserauth
   
 Allow for authentication mechanism and password to be changed.  Allow for authentication mechanism and password to be changed.
   
Line 6775  Place in B<logs/lond.log> Line 8262  Place in B<logs/lond.log>
   
 stores hash in namespace  stores hash in namespace
   
 =item rolesputy  =item rolesput
   
 put a role into a user's environment  put a role into a user's environment
   
Line 6836  for each student, defined perhaps by the Line 8323  for each student, defined perhaps by the
 Returns usernames corresponding to IDs.  (These "IDs" are unique identifiers  Returns usernames corresponding to IDs.  (These "IDs" are unique identifiers
 for each student, defined perhaps by the institutional Registrar.)  for each student, defined perhaps by the institutional Registrar.)
   
   =item iddel
   
   Deletes one or more ids in a domain's id database.
   
 =item tmpput  =item tmpput
   
 Accept and store information in temporary space.  Accept and store information in temporary space.
Line 6892  Authen::Krb5 Line 8383  Authen::Krb5
   
 =head1 COREQUISITES  =head1 COREQUISITES
   
   none
   
 =head1 OSNAMES  =head1 OSNAMES
   
 linux  linux
Line 6901  linux Line 8394  linux
 Server/Process  Server/Process
   
 =cut  =cut
   
   
   =pod
   
   =head1 LOG MESSAGES
   
   The messages below can be emitted in the lond log.  This log is located
   in ~httpd/perl/logs/lond.log  Many log messages have HTML encapsulation
   to provide coloring if examined from inside a web page. Some do not.
   Where color is used, the colors are; Red for sometihhng to get excited
   about and to follow up on. Yellow for something to keep an eye on to
   be sure it does not get worse, Green,and Blue for informational items.
   
   In the discussions below, sometimes reference is made to ~httpd
   when describing file locations.  There isn't really an httpd 
   user, however there is an httpd directory that gets installed in the
   place that user home directories go.  On linux, this is usually
   (always?) /home/httpd.
   
   
   Some messages are colorless.  These are usually (not always)
   Green/Blue color level messages.
   
   =over 2
   
   =item (Red)  LocalConnection rejecting non local: <ip> ne 127.0.0.1
   
   A local connection negotiation was attempted by
   a host whose IP address was not 127.0.0.1.
   The socket is closed and the child will exit.
   lond has three ways to establish an encyrption
   key with a client:
   
   =over 2
   
   =item local 
   
   The key is written and read from a file.
   This is only valid for connections from localhost.
   
   =item insecure 
   
   The key is generated by the server and
   transmitted to the client.
   
   =item  ssl (secure)
   
   An ssl connection is negotiated with the client,
   the key is generated by the server and sent to the 
   client across this ssl connection before the
   ssl connectionis terminated and clear text
   transmission resumes.
   
   =back
   
   =item (Red) LocalConnection: caller is insane! init = <init> and type = <type>
   
   The client is local but has not sent an initialization
   string that is the literal "init:local"  The connection
   is closed and the child exits.
   
   =item Red CRITICAL Can't get key file <error>        
   
   SSL key negotiation is being attempted but the call to
   lonssl::KeyFile  failed.  This usually means that the
   configuration file is not correctly defining or protecting
   the directories/files lonCertificateDirectory or
   lonnetPrivateKey
   <error> is a string that describes the reason that
   the key file could not be located.
   
   =item (Red) CRITICAL  Can't get certificates <error>  
   
   SSL key negotiation failed because we were not able to retrives our certificate
   or the CA's certificate in the call to lonssl::CertificateFile
   <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
   
   =item Permission error:
   
   The directory pointed to by lonCertificateDirectory is not readable by lond
   
   =item Permission error:
   
   Files in the directory pointed to by lonCertificateDirectory are not readable by lond.
   
   =item Installation error:                         
   
   Either the certificate authority file or the certificate have not
   been installed in lonCertificateDirectory.
   
   =item (Red) CRITICAL SSL Socket promotion failed:  <err> 
   
   The promotion of the connection from plaintext to SSL failed
   <err> is the reason for the failure.  There are two
   system calls involved in the promotion (one of which failed), 
   a dup to produce
   a second fd on the raw socket over which the encrypted data
   will flow and IO::SOcket::SSL->new_from_fd which creates
   the SSL connection on the duped fd.
   
   =item (Blue)   WARNING client did not respond to challenge 
   
   This occurs on an insecure (non SSL) connection negotiation request.
   lond generates some number from the time, the PID and sends it to
   the client.  The client must respond by echoing this information back.
   If the client does not do so, that's a violation of the challenge
   protocols and the connection will be failed.
   
   =item (Red) No manager table. Nobody can manage!!    
   
   lond has the concept of privileged hosts that
   can perform remote management function such
   as update the hosts.tab.   The manager hosts
   are described in the 
   ~httpd/lonTabs/managers.tab file.
   this message is logged if this file is missing.
   
   
   =item (Green) Registering manager <dnsname> as <cluster_name> with <ipaddress>
   
   Reports the successful parse and registration
   of a specific manager. 
   
   =item Green existing host <clustername:dnsname>  
   
   The manager host is already defined in the hosts.tab
   the information in that table, rather than the info in the
   manager table will be used to determine the manager's ip.
   
   =item (Red) Unable to craete <filename>                 
   
   lond has been asked to create new versions of an administrative
   file (by a manager).  When this is done, the new file is created
   in a temp file and then renamed into place so that there are always
   usable administrative files, even if the update fails.  This failure
   message means that the temp file could not be created.
   The update is abandoned, and the old file is available for use.
   
   =item (Green) CopyFile from <oldname> to <newname> failed
   
   In an update of administrative files, the copy of the existing file to a
   backup file failed.  The installation of the new file may still succeed,
   but there will not be a back up file to rever to (this should probably
   be yellow).
   
   =item (Green) Pushfile: backed up <oldname> to <newname>
   
   See above, the backup of the old administrative file succeeded.
   
   =item (Red)  Pushfile: Unable to install <filename> <reason>
   
   The new administrative file could not be installed.  In this case,
   the old administrative file is still in use.
   
   =item (Green) Installed new < filename>.                      
   
   The new administrative file was successfullly installed.                                               
   
   =item (Red) Reinitializing lond pid=<pid>                    
   
   The lonc child process <pid> will be sent a USR2 
   signal.
   
   =item (Red) Reinitializing self                                    
   
   We've been asked to re-read our administrative files,and
   are doing so.
   
   =item (Yellow) error:Invalid process identifier <ident>  
   
   A reinit command was received, but the target part of the 
   command was not valid.  It must be either
   'lond' or 'lonc' but was <ident>
   
   =item (Green) isValideditCommand checking: Command = <command> Key = <key> newline = <newline>
   
   Checking to see if lond has been handed a valid edit
   command.  It is possible the edit command is not valid
   in that case there are no log messages to indicate that.
   
   =item Result of password change for  <username> pwchange_success
   
   The password for <username> was
   successfully changed.
   
   =item Unable to open <user> passwd to change password
   
   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>  
   
   =item LWP GET: <message> for <fname> (<remoteurl>)
   
   The lightweight process fetch for a resource failed
   with <message> the local filename that should
   have existed/been created was  <fname> the
   corresponding URI: <remoteurl>  This is emitted in several
   places.
   
   =item Unable to move <transname> to <destname>     
   
   From fetch_user_file_handler - the user file was replicated but could not
   be mv'd to its final location.
   
   =item Looking for <domain> <username>              
   
   From user_has_session_handler - This should be a Debug call instead
   it indicates lond is about to check whether the specified user has a 
   session active on the specified domain on the local host.
   
   =item Client <ip> (<name>) hanging up: <input>     
   
   lond has been asked to exit by its client.  The <ip> and <name> identify the
   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
   to the best of our ability to get it (I would guess that any numeric value
   represents and errno value).  This is immediately followed by
   
   =item  Famous last words: Catching exception - <log> 
   
   Where log is some recent information about the state of the child.
   
   =item Red CRITICAL: TIME OUT <pid>                     
   
   Some timeout occured for server <pid>.  THis is normally a timeout on an LWP
   doing an HTTP::GET.
   
   =item child <pid> died                              
   
   The reaper caught a SIGCHILD for the lond child process <pid>
   This should be modified to also display the IP of the dying child
   $children{$pid}
   
   =item Unknown child 0 died                           
   A child died but the wait for it returned a pid of zero which really should not
   ever happen. 
   
   =item Child <which> - <pid> looks like we missed it's death 
   
   When a sigchild is received, the reaper process checks all children to see if they are
   alive.  If children are dying quite quickly, the lack of signal queuing can mean
   that a signal hearalds the death of more than one child.  If so this message indicates
   which other one died. <which> is the ip of a dead child
   
   =item Free socket: <shutdownretval>                
   
   The HUNTSMAN sub was called due to a SIGINT in a child process.  The socket is being shutdown.
   for whatever reason, <shutdownretval> is printed but in fact shutdown() is not documented
   to return anything. This is followed by: 
   
   =item Red CRITICAL: Shutting down                       
   
   Just prior to exit.
   
   =item Free socket: <shutdownretval>                 
   
   The HUPSMAN sub was called due to a SIGHUP.  all children get killsed, and lond execs itself.
   This is followed by:
   
   =item (Red) CRITICAL: Restarting                         
   
   lond is about to exec itself to restart.
   
   =item (Blue) Updating connections                        
   
   (In response to a USR2).  All the children (except the one for localhost)
   are about to be killed, the hosts tab reread, and Apache reloaded via apachereload.
   
   =item (Blue) UpdateHosts killing child <pid> for ip <ip>   
   
   Due to USR2 as above.
   
   =item (Green) keeping child for ip <ip> (pid = <pid>)    
   
   In response to USR2 as above, the child indicated is not being restarted because
   it's assumed that we'll always need a child for the localhost.
   
   
   =item Going to check on the children                
   
   Parent is about to check on the health of the child processes.
   Note that this is in response to a USR1 sent to the parent lond.
   there may be one or more of the next two messages:
   
   =item <pid> is dead                                 
   
   A child that we have in our child hash as alive has evidently died.
   
   =item  Child <pid> did not respond                   
   
   In the health check the child <pid> did not update/produce a pid_.txt
   file when sent it's USR1 signal.  That process is killed with a 9 signal, as it's
   assumed to be hung in some un-fixable way.
   
   =item Finished checking children                   
   
   Master processs's USR1 processing is cojmplete.
   
   =item (Red) CRITICAL: ------- Starting ------            
   
   (There are more '-'s on either side).  Lond has forked itself off to 
   form a new session and is about to start actual initialization.
   
   =item (Green) Attempting to start child (<client>)       
   
   Started a new child process for <client>.  Client is IO::Socket object
   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.
   
   =item Unable to determine clientip                  
   
   In child process initialization.  The peer address from getpeername was not defined.
   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
   
   =item <name> 
   
   is the name of the client from hosts.tab.
   
   =item <type> 
   
   Is the connection type which is either 
   
   =over 2
   
   =item manager 
   
   The connection is from a manager node, not in hosts.tab
   
   =item client  
   
   the connection is from a non-manager in the hosts.tab
   
   =item both
   
   The connection is from a manager in the hosts.tab.
   
   =back
   
   =back
   
   =item (Blue) Certificates not installed -- trying insecure auth
   
   One of the certificate file, key file or
   certificate authority file could not be found for a client attempting
   SSL connection intiation.  COnnection will be attemptied in in-secure mode.
   (this would be a system with an up to date lond that has not gotten a 
   certificate from us).
   
   =item (Green)  Successful local authentication            
   
   A local connection successfully negotiated the encryption key. 
   In this case the IDEA key is in a file (that is hopefully well protected).
   
   =item (Green) Successful ssl authentication with <client>  
   
   The client (<client> is the peer's name in hosts.tab), has successfully
   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.
   
   =item (Yellow) Attempted insecure connection disallowed    
   
   The client attempted and failed to successfully negotiate a successful insecure
   connection.  This can happen either because the variable londAllowInsecure is false
   or undefined, or becuse the child did not successfully echo back the challenge
   string.
   
   
   =back
   
   =back
   
   
   =cut

Removed from v.1.398  
changed lines
  Added in v.1.525


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