Diff for /loncom/lond between versions 1.220 and 1.237

version 1.220, 2004/08/02 11:02:02 version 1.237, 2004/08/24 07:26:04
Line 50  use File::Copy; Line 50  use File::Copy;
 use LONCAPA::ConfigFileEdit;  use LONCAPA::ConfigFileEdit;
 use LONCAPA::lonlocal;  use LONCAPA::lonlocal;
 use LONCAPA::lonssl;  use LONCAPA::lonssl;
   use Fcntl qw(:flock);
   
 my $DEBUG = 0;       # Non zero to enable debug log entries.  my $DEBUG = 0;       # Non zero to enable debug log entries.
   
Line 121  my @passwderrors = ("ok", Line 122  my @passwderrors = ("ok",
    "lcpasswd Cannot set new passwd.",     "lcpasswd Cannot set new passwd.",
    "lcpasswd Username has invalid characters",     "lcpasswd Username has invalid characters",
    "lcpasswd Invalid characters in password",     "lcpasswd Invalid characters in password",
     "11", "12",     "lcpasswd User already exists", 
     "lcpasswd Password mismatch");                     "lcpasswd Something went wrong with user addition.",
       "lcpasswd Password mismatch",
       "lcpasswd Error filename is invalid");
   
   
 #  The array below are lcuseradd error strings.:  #  The array below are lcuseradd error strings.:
Line 159  sub ResetStatistics { Line 162  sub ResetStatistics {
     $Failures     = 0;      $Failures     = 0;
 }  }
   
   
   
 #------------------------------------------------------------------------  #------------------------------------------------------------------------
 #  #
 #   LocalConnection  #   LocalConnection
Line 191  sub LocalConnection { Line 192  sub LocalConnection {
  ."$clientdns ne $thisserver </font>");   ."$clientdns ne $thisserver </font>");
  close $Socket;   close $Socket;
  return undef;   return undef;
     }       }  else {
     else {  
  chomp($initcmd); # Get rid of \n in filename.   chomp($initcmd); # Get rid of \n in filename.
  my ($init, $type, $name) = split(/:/, $initcmd);   my ($init, $type, $name) = split(/:/, $initcmd);
  Debug(" Init command: $init $type $name ");   Debug(" Init command: $init $type $name ");
Line 323  sub InsecureConnection { Line 323  sub InsecureConnection {
     $answer    =~s/\W//g;      $answer    =~s/\W//g;
     if($challenge eq $answer) {      if($challenge eq $answer) {
  return 1;   return 1;
     }       } else {
     else {  
  logthis("<font color='blue'>WARNING client did not respond to challenge</font>");   logthis("<font color='blue'>WARNING client did not respond to challenge</font>");
  &status("No challenge reqply");   &status("No challenge reqply");
  return 0;   return 0;
Line 371  sub isClient { Line 370  sub isClient {
 #                     - This allows dynamic changes to the manager table  #                     - This allows dynamic changes to the manager table
 #                       without the need to signal to the lond.  #                       without the need to signal to the lond.
 #  #
   
 sub ReadManagerTable {  sub ReadManagerTable {
   
     #   Clean out the old table first..      #   Clean out the old table first..
Line 653  sub PushFile { Line 651  sub PushFile {
  &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>");   ."</font>");
   
Line 1223  sub user_authorization_type { Line 1220  sub user_authorization_type {
     my $userinput = "$cmd:$tail";      my $userinput = "$cmd:$tail";
         
     #  Pull the domain and username out of the command tail.      #  Pull the domain and username out of the command tail.
     # and call GetAuthType to determine the authentication type.      # and call get_auth_type to determine the authentication type.
         
     my ($udom,$uname)=split(/:/,$tail);      my ($udom,$uname)=split(/:/,$tail);
     my $result = &GetAuthType($udom, $uname);      my $result = &get_auth_type($udom, $uname);
     if($result eq "nouser") {      if($result eq "nouser") {
  &Failure( $replyfd, "unknown_user\n", $userinput);   &Failure( $replyfd, "unknown_user\n", $userinput);
     } else {      } else {
  #   #
  # We only want to pass the second field from GetAuthType   # We only want to pass the second field from get_auth_type
  # for ^krb.. otherwise we'll be handing out the encrypted   # for ^krb.. otherwise we'll be handing out the encrypted
  # password for internals e.g.   # password for internals e.g.
  #   #
Line 1239  sub user_authorization_type { Line 1236  sub user_authorization_type {
  if($type =~ /^krb/) {   if($type =~ /^krb/) {
     $type = $result;      $type = $result;
  }   }
  &Reply( $replyfd, "$type\n", $userinput);   &Reply( $replyfd, "$type:\n", $userinput);
     }      }
       
     return 1;      return 1;
Line 1417  sub authenticate_handler { Line 1414  sub authenticate_handler {
   
 register_handler("auth", \&authenticate_handler, 1, 1, 0);  register_handler("auth", \&authenticate_handler, 1, 1, 0);
   
   #
   #   Change a user's password.  Note that this function is complicated by
   #   the fact that a user may be authenticated in more than one way:
   #   At present, we are not able to change the password for all types of
   #   authentication methods.  Only for:
   #      unix    - unix password or shadow passoword style authentication.
   #      local   - Locally written authentication mechanism.
   #   For now, kerb4 and kerb5 password changes are not supported and result
   #   in an error.
   # FUTURE WORK:
   #    Support kerberos passwd changes?
   # Parameters:
   #    $cmd      - The command that got us here.
   #    $tail     - Tail of the command (remaining parameters).
   #    $client   - File descriptor connected to client.
   # Returns
   #     0        - Requested to exit, caller should shut down.
   #     1        - Continue processing.
   # Implicit inputs:
   #    The authentication systems describe above have their own forms of implicit
   #    input into the authentication process that are described above.
   sub change_password_handler {
       my ($cmd, $tail, $client) = @_;
   
       my $userinput = $cmd.":".$tail;           # Reconstruct client's string.
   
       #
       #  udom  - user's domain.
       #  uname - Username.
       #  upass - Current password.
       #  npass - New password.
      
       my ($udom,$uname,$upass,$npass)=split(/:/,$tail);
   
       $upass=&unescape($upass);
       $npass=&unescape($npass);
       &Debug("Trying to change password for $uname");
   
       # First require that the user can be authenticated with their
       # old password:
   
       my $validated = &validate_user($udom, $uname, $upass);
       if($validated) {
    my $realpasswd  = &get_auth_type($udom, $uname); # Defined since authd.
   
    my ($howpwd,$contentpwd)=split(/:/,$realpasswd);
    if ($howpwd eq 'internal') {
       &Debug("internal auth");
       my $salt=time;
       $salt=substr($salt,6,2);
       my $ncpass=crypt($npass,$salt);
       if(&rewrite_password_file($udom, $uname, "internal:$ncpass")) {
    &logthis("Result of password change for "
    ."$uname: pwchange_success");
    &Reply($client, "ok\n", $userinput);
       } else {
    &logthis("Unable to open $uname passwd "               
    ."to change password");
    &Failure( $client, "non_authorized\n",$userinput);
       }
    } elsif ($howpwd eq 'unix') {
       # Unix means we have to access /etc/password
       &Debug("auth is unix");
       my $execdir=$perlvar{'lonDaemons'};
       &Debug("Opening lcpasswd pipeline");
       my $pf = IO::File->new("|$execdir/lcpasswd > "
      ."$perlvar{'lonDaemons'}"
      ."/logs/lcpasswd.log");
       print $pf "$uname\n$npass\n$npass\n";
       close $pf;
       my $err = $?;
       my $result = ($err>0 ? 'pwchange_failure' : 'ok');
       &logthis("Result of password change for $uname: ".
        &lcpasswdstrerror($?));
       &Reply($client, "$result\n", $userinput);
    } else {
       # this just means that the current password mode is not
       # one we know how to change (e.g the kerberos auth modes or
       # locally written auth handler).
       #
       &Failure( $client, "auth_mode_error\n", $userinput);
    }  
   
       } else {
    &Failure( $client, "non_authorized\n", $userinput);
       }
   
       return 1;
   }
   register_handler("passwd", \&change_password_handler, 1, 1, 0);
   
   
   #
   #   Create a new user.  User in this case means a lon-capa user.
   #   The user must either already exist in some authentication realm
   #   like kerberos or the /etc/passwd.  If not, a user completely local to
   #   this loncapa system is created.
   #
   # Parameters:
   #    $cmd      - The command that got us here.
   #    $tail     - Tail of the command (remaining parameters).
   #    $client   - File descriptor connected to client.
   # Returns
   #     0        - Requested to exit, caller should shut down.
   #     1        - Continue processing.
   # Implicit inputs:
   #    The authentication systems describe above have their own forms of implicit
   #    input into the authentication process that are described above.
   sub add_user_handler {
   
       my ($cmd, $tail, $client) = @_;
   
   
       my ($udom,$uname,$umode,$npass)=split(/:/,$tail);
       my $userinput = $cmd.":".$tail; # Reconstruct the full request line.
   
       &Debug("cmd =".$cmd." $udom =".$udom." uname=".$uname);
   
   
       if($udom eq $currentdomainid) { # Reject new users for other domains...
   
    my $oldumask=umask(0077);
    chomp($npass);
    $npass=&unescape($npass);
    my $passfilename  = &password_path($udom, $uname);
    &Debug("Password file created will be:".$passfilename);
    if (-e $passfilename) {
       &Failure( $client, "already_exists\n", $userinput);
    } else {
       my @fpparts=split(/\//,$passfilename);
       my $fpnow=$fpparts[0].'/'.$fpparts[1].'/'.$fpparts[2];
       my $fperror='';
       for (my $i=3;$i<= ($#fpparts-1);$i++) {
    $fpnow.='/'.$fpparts[$i]; 
    unless (-e $fpnow) {
       &logthis("mkdir $fpnow");
       unless (mkdir($fpnow,0777)) {
    $fperror="error: ".($!+0)." mkdir failed while attempting "
       ."makeuser";
       }
    }
       }
       unless ($fperror) {
    my $result=&make_passwd_file($uname, $umode,$npass, $passfilename);
    &Reply($client, $result, $userinput);     #BUGBUG - could be fail
       } else {
    &Failure($client, "$fperror\n", $userinput);
       }
    }
    umask($oldumask);
       }  else {
    &Failure($client, "not_right_domain\n",
    $userinput); # Even if we are multihomed.
       
       }
       return 1;
   
   }
   &register_handler("makeuser", \&add_user_handler, 1, 1, 0);
   
   #
   #   Change the authentication method of a user.  Note that this may
   #   also implicitly change the user's password if, for example, the user is
   #   joining an existing authentication realm.  Known authentication realms at
   #   this time are:
   #    internal   - Purely internal password file (only loncapa knows this user)
   #    local      - Institutionally written authentication module.
   #    unix       - Unix user (/etc/passwd with or without /etc/shadow).
   #    kerb4      - kerberos version 4
   #    kerb5      - kerberos version 5
   #
   # Parameters:
   #    $cmd      - The command that got us here.
   #    $tail     - Tail of the command (remaining parameters).
   #    $client   - File descriptor connected to client.
   # Returns
   #     0        - Requested to exit, caller should shut down.
   #     1        - Continue processing.
   # Implicit inputs:
   #    The authentication systems describe above have their own forms of implicit
   #    input into the authentication process that are described above.
   #
   sub change_authentication_handler {
   
       my ($cmd, $tail, $client) = @_;
      
       my $userinput  = "$cmd:$tail";              # Reconstruct user input.
   
       my ($udom,$uname,$umode,$npass)=split(/:/,$tail);
       &Debug("cmd = ".$cmd." domain= ".$udom."uname =".$uname." umode= ".$umode);
       if ($udom ne $currentdomainid) {
    &Failure( $client, "not_right_domain\n", $client);
       } else {
   
    chomp($npass);
   
    $npass=&unescape($npass);
    my $passfilename = &password_path($udom, $uname);
    if ($passfilename) { # Not allowed to create a new user!!
       my $result=&make_passwd_file($uname, $umode,$npass,$passfilename);
       &Reply($client, $result, $userinput);
    } else {       
       &Failure($client, "non_authorized", $userinput); # Fail the user now.
    }
       }
       return 1;
   }
   &register_handler("changeuserauth", \&change_authentication_handler, 1,1, 0);
   
   #
   #   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
   #   to do is determine if this file exists.
   #
   # Parameters:
   #    $cmd      - The command that got us here.
   #    $tail     - Tail of the command (remaining parameters).
   #    $client   - File descriptor connected to client.
   # Returns
   #     0        - Requested to exit, caller should shut down.
   #     1        - Continue processing.
   # Implicit inputs:
   #    The authentication systems describe above have their own forms of implicit
   #    input into the authentication process that are described above.
   #
   sub is_home_handler {
       my ($cmd, $tail, $client) = @_;
      
       my $userinput  = "$cmd:$tail";
      
       my ($udom,$uname)=split(/:/,$tail);
       chomp($uname);
       my $passfile = &password_filename($udom, $uname);
       if($passfile) {
    &Reply( $client, "found\n", $userinput);
       } else {
    &Failure($client, "not_found\n", $userinput);
       }
       return 1;
   }
   &register_handler("home", \&is_home_handler, 0,1,0);
   
   #
   #   Process an update request for a resource?? I think what's going on here is
   #   that 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
   #   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:
   #    $cmd      - The command that got us here.
   #    $tail     - Tail of the command (remaining parameters).
   #    $client   - File descriptor connected to client.
   # Returns
   #     0        - Requested to exit, caller should shut down.
   #     1        - Continue processing.
   # Implicit inputs:
   #    The authentication systems describe above have their own forms of implicit
   #    input into the authentication process that are described above.
   #
   sub update_resource_handler {
   
       my ($cmd, $tail, $client) = @_;
      
       my $userinput = "$cmd:$tail";
      
       my $fname= $tail; # This allows interactive testing
   
   
       my $ownership=ishome($fname);
       if ($ownership eq 'not_owner') {
    if (-e $fname) {
       my ($dev,$ino,$mode,$nlink,$uid,$gid,$rdev,$size,
    $atime,$mtime,$ctime,$blksize,$blocks)=stat($fname);
       my $now=time;
       my $since=$now-$atime;
       if ($since>$perlvar{'lonExpire'}) {
    my $reply=&reply("unsub:$fname","$clientname");
    unlink("$fname");
       } else {
    my $transname="$fname.in.transfer";
    my $remoteurl=&reply("sub:$fname","$clientname");
    my $response;
    alarm(120);
    {
       my $ua=new LWP::UserAgent;
       my $request=new HTTP::Request('GET',"$remoteurl");
       $response=$ua->request($request,$transname);
    }
    alarm(0);
    if ($response->is_error()) {
       unlink($transname);
       my $message=$response->status_line;
       &logthis("LWP GET: $message for $fname ($remoteurl)");
    } else {
       if ($remoteurl!~/\.meta$/) {
    alarm(120);
    {
       my $ua=new LWP::UserAgent;
       my $mrequest=new HTTP::Request('GET',$remoteurl.'.meta');
       my $mresponse=$ua->request($mrequest,$fname.'.meta');
       if ($mresponse->is_error()) {
    unlink($fname.'.meta');
       }
    }
    alarm(0);
       }
       rename($transname,$fname);
    }
       }
       &Reply( $client, "ok\n", $userinput);
    } else {
       &Failure($client, "not_found\n", $userinput);
    }
       } else {
    &Failure($client, "rejected\n", $userinput);
       }
       return 1;
   }
   &register_handler("update", \&update_resource_handler, 0 ,1, 0);
   
   #
   #   Fetch a user file from a remote server to the user's home directory
   #   userfiles subdir.
   # Parameters:
   #    $cmd      - The command that got us here.
   #    $tail     - Tail of the command (remaining parameters).
   #    $client   - File descriptor connected to client.
   # Returns
   #     0        - Requested to exit, caller should shut down.
   #     1        - Continue processing.
   #
   sub fetch_user_file_handler {
   
       my ($cmd, $tail, $client) = @_;
   
       my $userinput = "$cmd:$tail";
       my $fname           = $tail;
       my ($udom,$uname,$ufile) = ($fname =~ m|^([^/]+)/([^/]+)/(.+)$|);
       my $udir=&propath($udom,$uname).'/userfiles';
       unless (-e $udir) {
    mkdir($udir,0770); 
       }
       Debug("fetch user file for $fname");
       if (-e $udir) {
    $ufile=~s/^[\.\~]+//;
   
    # IF necessary, create the path right down to the file.
    # Note that any regular files in the way of this path are
    # wiped out to deal with some earlier folly of mine.
   
    my $path = $udir;
    if ($ufile =~m|(.+)/([^/]+)$|) {
       my @parts=split('/',$1);
       foreach my $part (@parts) {
    $path .= '/'.$part;
    if( -f $path) {
       unlink($path);
    }
    if ((-e $path)!=1) {
       mkdir($path,0770);
    }
       }
    }
   
   
    my $destname=$udir.'/'.$ufile;
    my $transname=$udir.'/'.$ufile.'.in.transit';
    my $remoteurl='http://'.$clientip.'/userfiles/'.$fname;
    my $response;
    Debug("Remote URL : $remoteurl Transfername $transname Destname: $destname");
    alarm(120);
    {
       my $ua=new LWP::UserAgent;
       my $request=new HTTP::Request('GET',"$remoteurl");
       $response=$ua->request($request,$transname);
    }
    alarm(0);
    if ($response->is_error()) {
       unlink($transname);
       my $message=$response->status_line;
       &logthis("LWP GET: $message for $fname ($remoteurl)");
       &Failure($client, "failed\n", $userinput);
    } else {
       Debug("Renaming $transname to $destname");
       if (!rename($transname,$destname)) {
    &logthis("Unable to move $transname to $destname");
    unlink($transname);
    &Failure($client, "failed\n", $userinput);
       } else {
    &Reply($client, "ok\n", $userinput);
       }
    }   
       } else {
    &Failure($client, "not_home\n", $userinput);
       }
       return 1;
   }
   &register_handler("fetchuserfile", \&fetch_user_file_handler, 0, 1, 0);
   
   #
   #   Remove a file from a user's home directory userfiles subdirectory.
   # Parameters:
   #    cmd   - the Lond request keyword that got us here.
   #    tail  - the part of the command past the keyword.
   #    client- File descriptor connected with the client.
   #
   # Returns:
   #    1    - Continue processing.
   
   sub remove_user_file_handler {
       my ($cmd, $tail, $client) = @_;
   
       my ($fname) = split(/:/, $tail); # Get rid of any tailing :'s lonc may have sent.
   
       my ($udom,$uname,$ufile) = ($fname =~ m|^([^/]+)/([^/]+)/(.+)$|);
       if ($ufile =~m|/\.\./|) {
    # any files paths with /../ in them refuse 
    # to deal with
    &Failure($client, "refused\n", "$cmd:$tail");
       } else {
    my $udir = &propath($udom,$uname);
    if (-e $udir) {
       my $file=$udir.'/userfiles/'.$ufile;
       if (-e $file) {
    unlink($file);
    if (-e $file) {
       &Failure($client, "failed\n", "$cmd:$tail");
    } else {
       &Reply($client, "ok\n", "$cmd:$tail");
    }
       } else {
    &Failure($client, "not_found\n", "$cmd:$tail");
       }
    } else {
       &Failure($client, "not_home\n", "$cmd:$tail");
    }
       }
       return 1;
   }
   &register_handler("removeuserfile", \&remove_user_file_handler, 0,1,0);
   
   #
   #   make a directory in a user's home directory userfiles subdirectory.
   # Parameters:
   #    cmd   - the Lond request keyword that got us here.
   #    tail  - the part of the command past the keyword.
   #    client- File descriptor connected with the client.
   #
   # Returns:
   #    1    - Continue processing.
   
   sub mkdir_user_file_handler {
       my ($cmd, $tail, $client) = @_;
   
       my ($dir) = split(/:/, $tail); # Get rid of any tailing :'s lonc may have sent.
       $dir=&unescape($dir);
       my ($udom,$uname,$ufile) = ($dir =~ m|^([^/]+)/([^/]+)/(.+)$|);
       if ($ufile =~m|/\.\./|) {
    # any files paths with /../ in them refuse 
    # to deal with
    &Failure($client, "refused\n", "$cmd:$tail");
       } else {
    my $udir = &propath($udom,$uname);
    if (-e $udir) {
       my $newdir=$udir.'/userfiles/'.$ufile;
       if (!-e $newdir) {
    mkdir($newdir);
    if (!-e $newdir) {
       &Failure($client, "failed\n", "$cmd:$tail");
    } else {
       &Reply($client, "ok\n", "$cmd:$tail");
    }
       } else {
    &Failure($client, "not_found\n", "$cmd:$tail");
       }
    } else {
       &Failure($client, "not_home\n", "$cmd:$tail");
    }
       }
       return 1;
   }
   &register_handler("mkdiruserfile", \&mkdir_user_file_handler, 0,1,0);
   
   #
   #   rename a file in a user's home directory userfiles subdirectory.
   # Parameters:
   #    cmd   - the Lond request keyword that got us here.
   #    tail  - the part of the command past the keyword.
   #    client- File descriptor connected with the client.
   #
   # Returns:
   #    1    - Continue processing.
   
   sub rename_user_file_handler {
       my ($cmd, $tail, $client) = @_;
   
       my ($udom,$uname,$old,$new) = split(/:/, $tail);
       $old=&unescape($old);
       $new=&unescape($new);
       if ($new =~m|/\.\./| || $old =~m|/\.\./|) {
    # any files paths with /../ in them refuse to deal with
    &Failure($client, "refused\n", "$cmd:$tail");
       } else {
    my $udir = &propath($udom,$uname);
    if (-e $udir) {
       my $oldfile=$udir.'/userfiles/'.$old;
       my $newfile=$udir.'/userfiles/'.$new;
       if (-e $newfile) {
    &Failure($client, "exists\n", "$cmd:$tail");
       } elsif (! -e $oldfile) {
    &Failure($client, "not_found\n", "$cmd:$tail");
       } else {
    if (!rename($oldfile,$newfile)) {
       &Failure($client, "failed\n", "$cmd:$tail");
    } else {
       &Reply($client, "ok\n", "$cmd:$tail");
    }
       }
    } else {
       &Failure($client, "not_home\n", "$cmd:$tail");
    }
       }
       return 1;
   }
   &register_handler("renameuserfile", \&rename_user_file_handler, 0,1,0);
   
   
   #
   #  Authenticate access to a user file by checking the user's 
   #  session token(?)
   #
   # Parameters:
   #   cmd      - The request keyword that dispatched to tus.
   #   tail     - The tail of the request (colon separated parameters).
   #   client   - Filehandle open on the client.
   # Return:
   #    1.
   
   sub token_auth_user_file_handler {
       my ($cmd, $tail, $client) = @_;
   
       my ($fname, $session) = split(/:/, $tail);
       
       chomp($session);
       my $reply='non_auth';
       if (open(ENVIN,$perlvar{'lonIDsDir'}.'/'.
        $session.'.id')) {
    while (my $line=<ENVIN>) {
       if ($line=~ m|userfile\.\Q$fname\E\=|) { $reply='ok'; }
    }
    close(ENVIN);
    &Reply($client, $reply);
       } else {
    &Failure($client, "invalid_token\n", "$cmd:$tail");
       }
       return 1;
   
   }
   
   &register_handler("tokenauthuserfile", \&token_auth_user_file_handler, 0,1,0);
   
   
   #
   #   Unsubscribe from a resource.
   #
   # Parameters:
   #    $cmd      - The command that got us here.
   #    $tail     - Tail of the command (remaining parameters).
   #    $client   - File descriptor connected to client.
   # Returns
   #     0        - Requested to exit, caller should shut down.
   #     1        - Continue processing.
   #
   sub unsubscribe_handler {
       my ($cmd, $tail, $client) = @_;
   
       my $userinput= "$cmd:$tail";
       
       my ($fname) = split(/:/,$tail); # Split in case there's extrs.
   
       &Debug("Unsubscribing $fname");
       if (-e $fname) {
    &Debug("Exists");
    &Reply($client, &unsub($fname,$clientip), $userinput);
       } else {
    &Failure($client, "not_found\n", $userinput);
       }
       return 1;
   }
   &register_handler("unsub", \&unsubscribe_handler, 0, 1, 0);
   #   Subscribe to a resource
   #
   # Parameters:
   #    $cmd      - The command that got us here.
   #    $tail     - Tail of the command (remaining parameters).
   #    $client   - File descriptor connected to client.
   # Returns
   #     0        - Requested to exit, caller should shut down.
   #     1        - Continue processing.
   #
   sub subscribe_handler {
       my ($cmd, $tail, $client)= @_;
   
       my $userinput  = "$cmd:$tail";
   
       &Reply( $client, &subscribe($userinput,$clientip), $userinput);
   
       return 1;
   }
   &register_handler("sub", \&subscribe_handler, 0, 1, 0);
   
   #
   #   Determine the version of a resource (?) Or is it return
   #   the top version of the resource?  Not yet clear from the
   #   code in currentversion.
   #
   # Parameters:
   #    $cmd      - The command that got us here.
   #    $tail     - Tail of the command (remaining parameters).
   #    $client   - File descriptor connected to client.
   # Returns
   #     0        - Requested to exit, caller should shut down.
   #     1        - Continue processing.
   #
   sub current_version_handler {
       my ($cmd, $tail, $client) = @_;
   
       my $userinput= "$cmd:$tail";
      
       my $fname   = $tail;
       &Reply( $client, &currentversion($fname)."\n", $userinput);
       return 1;
   
   }
   &register_handler("currentversion", \&current_version_handler, 0, 1, 0);
   
   #  Make an entry in a user's activity log.
   #
   # Parameters:
   #    $cmd      - The command that got us here.
   #    $tail     - Tail of the command (remaining parameters).
   #    $client   - File descriptor connected to client.
   # Returns
   #     0        - Requested to exit, caller should shut down.
   #     1        - Continue processing.
   #
   sub activity_log_handler {
       my ($cmd, $tail, $client) = @_;
   
   
       my $userinput= "$cmd:$tail";
   
       my ($udom,$uname,$what)=split(/:/,$tail);
       chomp($what);
       my $proname=&propath($udom,$uname);
       my $now=time;
       my $hfh;
       if ($hfh=IO::File->new(">>$proname/activity.log")) { 
    print $hfh "$now:$clientname:$what\n";
    &Reply( $client, "ok\n", $userinput); 
       } else {
    &Failure($client, "error: ".($!+0)." IO::File->new Failed "
    ."while attempting log\n", 
    $userinput);
       }
   
       return 1;
   }
   register_handler("log", \&activity_log_handler, 0, 1, 0);
   
   #
   #   Put a namespace entry in a user profile hash.
   #   My druthers would be for this to be an encrypted interaction too.
   #   anything that might be an inadvertent covert channel about either
   #   user authentication or user personal information....
   #
   # Parameters:
   #    $cmd      - The command that got us here.
   #    $tail     - Tail of the command (remaining parameters).
   #    $client   - File descriptor connected to client.
   # Returns
   #     0        - Requested to exit, caller should shut down.
   #     1        - Continue processing.
   #
   sub put_user_profile_entry {
       my ($cmd, $tail, $client)  = @_;
   
       my $userinput = "$cmd:$tail";
       
       my ($udom,$uname,$namespace,$what) =split(/:/,$tail);
       if ($namespace ne 'roles') {
    chomp($what);
    my $hashref = &tie_user_hash($udom, $uname, $namespace,
     &GDBM_WRCREAT(),"P",$what);
    if($hashref) {
       my @pairs=split(/\&/,$what);
       foreach my $pair (@pairs) {
    my ($key,$value)=split(/=/,$pair);
    $hashref->{$key}=$value;
       }
       if (untie(%$hashref)) {
    &Reply( $client, "ok\n", $userinput);
       } else {
    &Failure($client, "error: ".($!+0)." untie(GDBM) failed ".
    "while attempting put\n", 
    $userinput);
       }
    } else {
       &Failure( $client, "error: ".($!)." tie(GDBM) Failed ".
        "while attempting put\n", $userinput);
    }
       } else {
           &Failure( $client, "refused\n", $userinput);
       }
       
       return 1;
   }
   &register_handler("put", \&put_user_profile_entry, 0, 1, 0);
   
   # 
   #   Increment a profile entry in the user history file.
   #   The history contains keyword value pairs.  In this case,
   #   The value itself is a pair of numbers.  The first, the current value
   #   the second an increment that this function applies to the current
   #   value.
   #
   # Parameters:
   #    $cmd      - The command that got us here.
   #    $tail     - Tail of the command (remaining parameters).
   #    $client   - File descriptor connected to client.
   # Returns
   #     0        - Requested to exit, caller should shut down.
   #     1        - Continue processing.
   #
   sub increment_user_value_handler {
       my ($cmd, $tail, $client) = @_;
       
       my $userinput   = "$cmd:$tail";
       
       my ($udom,$uname,$namespace,$what) =split(/:/,$tail);
       if ($namespace ne 'roles') {
           chomp($what);
    my $hashref = &tie_user_hash($udom, $uname,
        $namespace, &GDBM_WRCREAT(),
        "P",$what);
    if ($hashref) {
       my @pairs=split(/\&/,$what);
       foreach my $pair (@pairs) {
    my ($key,$value)=split(/=/,$pair);
    # We could check that we have a number...
    if (! defined($value) || $value eq '') {
       $value = 1;
    }
    $hashref->{$key}+=$value;
       }
       if (untie(%$hashref)) {
    &Reply( $client, "ok\n", $userinput);
       } else {
    &Failure($client, "error: ".($!+0)." untie(GDBM) failed ".
    "while attempting inc\n", $userinput);
       }
    } else {
       &Failure($client, "error: ".($!+0)." tie(GDBM) Failed ".
        "while attempting inc\n", $userinput);
    }
       } else {
    &Failure($client, "refused\n", $userinput);
       }
       
       return 1;
   }
   &register_handler("inc", \&increment_user_value_handler, 0, 1, 0);
   
   
   #
   #   Put a new role for a user.  Roles are LonCAPA's packaging of permissions.
   #   Each 'role' a user has implies a set of permissions.  Adding a new role
   #   for a person grants the permissions packaged with that role
   #   to that user when the role is selected.
   #
   # Parameters:
   #    $cmd       - The command string (rolesput).
   #    $tail      - The remainder of the request line.  For rolesput this
   #                 consists of a colon separated list that contains:
   #                 The domain and user that is granting the role (logged).
   #                 The domain and user that is getting the role.
   #                 The roles being granted as a set of & separated pairs.
   #                 each pair a key value pair.
   #    $client    - File descriptor connected to the client.
   # Returns:
   #     0         - If the daemon should exit
   #     1         - To continue processing.
   #
   #
   sub roles_put_handler {
       my ($cmd, $tail, $client) = @_;
   
       my $userinput  = "$cmd:$tail";
   
       my ( $exedom, $exeuser, $udom, $uname,  $what) = split(/:/,$tail);
       
   
       my $namespace='roles';
       chomp($what);
       my $hashref = &tie_user_hash($udom, $uname, $namespace,
    &GDBM_WRCREAT(), "P",
    "$exedom:$exeuser:$what");
       #
       #  Log the attempt to set a role.  The {}'s here ensure that the file 
       #  handle is open for the minimal amount of time.  Since the flush
       #  is done on close this improves the chances the log will be an un-
       #  corrupted ordered thing.
       if ($hashref) {
    my @pairs=split(/\&/,$what);
    foreach my $pair (@pairs) {
       my ($key,$value)=split(/=/,$pair);
       &manage_permissions($key, $udom, $uname,
          &get_auth_type( $udom, $uname));
       $hashref->{$key}=$value;
    }
    if (untie($hashref)) {
       &Reply($client, "ok\n", $userinput);
    } else {
       &Failure( $client, "error: ".($!+0)." untie(GDBM) Failed ".
        "while attempting rolesput\n", $userinput);
    }
       } else {
    &Failure( $client, "error: ".($!+0)." tie(GDBM) Failed ".
    "while attempting rolesput\n", $userinput);
       }
       return 1;
   }
   &register_handler("rolesput", \&roles_put_handler, 1,1,0);  # Encoded client only.
   
   #
   #   Deletes (removes) a role for a user.   This is equivalent to removing
   #  a permissions package associated with the role from the user's profile.
   #
   # Parameters:
   #     $cmd                 - The command (rolesdel)
   #     $tail                - The remainder of the request line. This consists
   #                             of:
   #                             The domain and user requesting the change (logged)
   #                             The domain and user being changed.
   #                             The roles being revoked.  These are shipped to us
   #                             as a bunch of & separated role name keywords.
   #     $client              - The file handle open on the client.
   # Returns:
   #     1                    - Continue processing
   #     0                    - Exit.
   #
   sub roles_delete_handler {
       my ($cmd, $tail, $client)  = @_;
   
       my $userinput    = "$cmd:$tail";
      
       my ($exedom,$exeuser,$udom,$uname,$what)=split(/:/,$tail);
       &Debug("cmd = ".$cmd." exedom= ".$exedom."user = ".$exeuser." udom=".$udom.
      "what = ".$what);
       my $namespace='roles';
       chomp($what);
       my $hashref = &tie_user_hash($udom, $uname, $namespace,
    &GDBM_WRCREAT(), "D",
    "$exedom:$exeuser:$what");
       
       if ($hashref) {
    my @rolekeys=split(/\&/,$what);
   
    foreach my $key (@rolekeys) {
       delete $hashref->{$key};
    }
    if (untie(%$hashref)) {
       &Reply($client, "ok\n", $userinput);
    } else {
       &Failure( $client, "error: ".($!+0)." untie(GDBM) Failed ".
        "while attempting rolesdel\n", $userinput);
    }
       } else {
           &Failure( $client, "error: ".($!+0)." tie(GDBM) Failed ".
    "while attempting rolesdel\n", $userinput);
       }
       
       return 1;
   }
   &register_handler("rolesdel", \&roles_delete_handler, 1,1, 0); # Encoded client only
   
   # Unencrypted get from a user's profile database.  See 
   # GetProfileEntryEncrypted for a version that does end-to-end encryption.
   # This function retrieves a keyed item from a specific named database in the
   # user's directory.
   #
   # Parameters:
   #   $cmd             - Command request keyword (get).
   #   $tail            - Tail of the command.  This is a colon separated list
   #                      consisting of the domain and username that uniquely
   #                      identifies the profile,
   #                      The 'namespace' which selects the gdbm file to 
   #                      do the lookup in, 
   #                      & separated list of keys to lookup.  Note that
   #                      the values are returned as an & separated list too.
   #   $client          - File descriptor open on the client.
   # Returns:
   #   1       - Continue processing.
   #   0       - Exit.
   #
   sub get_profile_entry {
       my ($cmd, $tail, $client) = @_;
   
       my $userinput= "$cmd:$tail";
      
       my ($udom,$uname,$namespace,$what) = split(/:/,$tail);
       chomp($what);
       my $hashref = &tie_user_hash($udom, $uname, $namespace,
    &GDBM_READER());
       if ($hashref) {
           my @queries=split(/\&/,$what);
           my $qresult='';
   
    for (my $i=0;$i<=$#queries;$i++) {
       $qresult.="$hashref->{$queries[$i]}&";    # Presumably failure gives empty string.
    }
    $qresult=~s/\&$//;              # Remove trailing & from last lookup.
    if (untie(%$hashref)) {
       &Reply($client, "$qresult\n", $userinput);
    } else {
       &Failure($client, "error: ".($!+0)." untie(GDBM) Failed ".
       "while attempting get\n", $userinput);
    }
       } else {
    if ($!+0 == 2) {               # +0 coerces errno -> number 2 is ENOENT
       &Failure($client, "error:No such file or ".
       "GDBM reported bad block error\n", $userinput);
    } else {                        # Some other undifferentiated err.
       &Failure($client, "error: ".($!+0)." tie(GDBM) Failed ".
       "while attempting get\n", $userinput);
    }
       }
       return 1;
   }
   &register_handler("get", \&get_profile_entry, 0,1,0);
   
   #
   #  Process the encrypted get request.  Note that the request is sent
   #  in clear, but the reply is encrypted.  This is a small covert channel:
   #  information about the sensitive keys is given to the snooper.  Just not
   #  information about the values of the sensitive key.  Hmm if I wanted to
   #  know these I'd snoop for the egets. Get the profile item names from them
   #  and then issue a get for them since there's no enforcement of the
   #  requirement of an encrypted get for particular profile items.  If I
   #  were re-doing this, I'd force the request to be encrypted as well as the
   #  reply.  I'd also just enforce encrypted transactions for all gets since
   #  that would prevent any covert channel snooping.
   #
   #  Parameters:
   #     $cmd               - Command keyword of request (eget).
   #     $tail              - Tail of the command.  See GetProfileEntry #                          for more information about this.
   #     $client            - File open on the client.
   #  Returns:
   #     1      - Continue processing
   #     0      - server should exit.
   sub get_profile_entry_encrypted {
       my ($cmd, $tail, $client) = @_;
   
       my $userinput = "$cmd:$tail";
      
       my ($cmd,$udom,$uname,$namespace,$what) = split(/:/,$userinput);
       chomp($what);
       my $hashref = &tie_user_hash($udom, $uname, $namespace,
    &GDBM_READER());
       if ($hashref) {
           my @queries=split(/\&/,$what);
           my $qresult='';
    for (my $i=0;$i<=$#queries;$i++) {
       $qresult.="$hashref->{$queries[$i]}&";
    }
    if (untie(%$hashref)) {
       $qresult=~s/\&$//;
       if ($cipher) {
    my $cmdlength=length($qresult);
    $qresult.="         ";
    my $encqresult='';
    for(my $encidx=0;$encidx<=$cmdlength;$encidx+=8) {
       $encqresult.= unpack("H16", 
    $cipher->encrypt(substr($qresult,
    $encidx,
    8)));
    }
    &Reply( $client, "enc:$cmdlength:$encqresult\n", $userinput);
       } else {
    &Failure( $client, "error:no_key\n", $userinput);
       }
    } else {
       &Failure($client, "error: ".($!+0)." untie(GDBM) Failed ".
       "while attempting eget\n", $userinput);
    }
       } else {
    &Failure($client, "error: ".($!+0)." tie(GDBM) Failed ".
    "while attempting eget\n", $userinput);
       }
       
       return 1;
   }
   &register_handler("eget", \&GetProfileEntryEncrypted, 0, 1, 0);
   #
   #   Deletes a key in a user profile database.
   #   
   #   Parameters:
   #       $cmd                  - Command keyword (del).
   #       $tail                 - Command tail.  IN this case a colon
   #                               separated list containing:
   #                               The domain and user that identifies uniquely
   #                               the identity of the user.
   #                               The profile namespace (name of the profile
   #                               database file).
   #                               & separated list of keywords to delete.
   #       $client              - File open on client socket.
   # Returns:
   #     1   - Continue processing
   #     0   - Exit server.
   #
   #
   
   sub delete_profile_entry {
       my ($cmd, $tail, $client) = @_;
   
       my $userinput = "cmd:$tail";
   
       my ($udom,$uname,$namespace,$what) = split(/:/,$tail);
       chomp($what);
       my $hashref = &tie_user_hash($udom, $uname, $namespace,
    &GDBM_WRCREAT(),
    "D",$what);
       if ($hashref) {
           my @keys=split(/\&/,$what);
    foreach my $key (@keys) {
       delete($hashref->{$key});
    }
    if (untie(%$hashref)) {
       &Reply($client, "ok\n", $userinput);
    } else {
       &Failure($client, "error: ".($!+0)." untie(GDBM) Failed ".
       "while attempting del\n", $userinput);
    }
       } else {
    &Failure( $client, "error: ".($!+0)." tie(GDBM) Failed ".
    "while attempting del\n", $userinput);
       }
       return 1;
   }
   &register_handler("del", \&delete_profile_entry, 0, 1, 0);
   #
   #  List the set of keys that are defined in a profile database file.
   #  A successful reply from this will contain an & separated list of
   #  the keys. 
   # Parameters:
   #     $cmd              - Command request (keys).
   #     $tail             - Remainder of the request, a colon separated
   #                         list containing domain/user that identifies the
   #                         user being queried, and the database namespace
   #                         (database filename essentially).
   #     $client           - File open on the client.
   #  Returns:
   #    1    - Continue processing.
   #    0    - Exit the server.
   #
   sub get_profile_keys {
       my ($cmd, $tail, $client) = @_;
   
       my $userinput = "$cmd:$tail";
   
       my ($udom,$uname,$namespace)=split(/:/,$tail);
       my $qresult='';
       my $hashref = &tie_user_hash($udom, $uname, $namespace,
     &GDBM_READER());
       if ($hashref) {
    foreach my $key (keys %$hashref) {
       $qresult.="$key&";
    }
    if (untie(%$hashref)) {
       $qresult=~s/\&$//;
       &Reply($client, "$qresult\n", $userinput);
    } else {
       &Failure($client, "error: ".($!+0)." untie(GDBM) Failed ".
       "while attempting keys\n", $userinput);
    }
       } else {
    &Failure( $client, "error: ".($!+0)." tie(GDBM) Failed ".
    "while attempting keys\n", $userinput);
       }
      
       return 1;
   }
   &register_handler("keys", \&get_profile_keys, 0, 1, 0);
   
   #
   #   Dump the contents of a user profile database.
   #   Note that this constitutes a very large covert channel too since
   #   the dump will return sensitive information that is not encrypted.
   #   The naive security assumption is that the session negotiation ensures
   #   our client is trusted and I don't believe that's assured at present.
   #   Sure want badly to go to ssl or tls.  Of course if my peer isn't really
   #   a LonCAPA node they could have negotiated an encryption key too so >sigh<.
   # 
   #  Parameters:
   #     $cmd           - The command request keyword (currentdump).
   #     $tail          - Remainder of the request, consisting of a colon
   #                      separated list that has the domain/username and
   #                      the namespace to dump (database file).
   #     $client        - file open on the remote client.
   # Returns:
   #     1    - Continue processing.
   #     0    - Exit the server.
   #
   sub dump_profile_database {
       my ($cmd, $tail, $client) = @_;
   
       my $userinput = "$cmd:$tail";
      
       my ($udom,$uname,$namespace) = split(/:/,$tail);
       my $hashref = &tie_user_hash($udom, $uname, $namespace,
    &GDBM_READER());
       if ($hashref) {
    # Structure of %data:
    # $data{$symb}->{$parameter}=$value;
    # $data{$symb}->{'v.'.$parameter}=$version;
    # since $parameter will be unescaped, we do not
     # have to worry about silly parameter names...
   
           my $qresult='';
    my %data = ();                     # A hash of anonymous hashes..
    while (my ($key,$value) = each(%$hashref)) {
       my ($v,$symb,$param) = split(/:/,$key);
       next if ($v eq 'version' || $symb eq 'keys');
       next if (exists($data{$symb}) && 
        exists($data{$symb}->{$param}) &&
        $data{$symb}->{'v.'.$param} > $v);
       $data{$symb}->{$param}=$value;
       $data{$symb}->{'v.'.$param}=$v;
    }
    if (untie(%$hashref)) {
       while (my ($symb,$param_hash) = each(%data)) {
    while(my ($param,$value) = each (%$param_hash)){
       next if ($param =~ /^v\./);       # Ignore versions...
       #
       #   Just dump the symb=value pairs separated by &
       #
       $qresult.=$symb.':'.$param.'='.$value.'&';
    }
       }
       chop($qresult);
       &Reply($client , "$qresult\n", $userinput);
    } else {
       &Failure( $client, "error: ".($!+0)." untie(GDBM) Failed ".
        "while attempting currentdump\n", $userinput);
    }
       } else {
    &Failure($client, "error: ".($!+0)." tie(GDBM) Failed ".
    "while attempting currentdump\n", $userinput);
       }
   
       return 1;
   }
   &register_handler("currentdump", \&dump_profile_database, 0, 1, 0);
   
   #
   #   Dump a profile database with an optional regular expression
   #   to match against the keys.  In this dump, no effort is made
   #   to separate symb from version information. Presumably the
   #   databases that are dumped by this command are of a different
   #   structure.  Need to look at this and improve the documentation of
   #   both this and the currentdump handler.
   # Parameters:
   #    $cmd                     - The command keyword.
   #    $tail                    - All of the characters after the $cmd:
   #                               These are expected to be a colon
   #                               separated list containing:
   #                               domain/user - identifying the user.
   #                               namespace   - identifying the database.
   #                               regexp      - optional regular expression
   #                                             that is matched against
   #                                             database keywords to do
   #                                             selective dumps.
   #   $client                   - Channel open on the client.
   # Returns:
   #    1    - Continue processing.
   # Side effects:
   #    response is written to $client.
   #
   sub dump_with_regexp {
       my ($cmd, $tail, $client) = @_;
   
   
       my $userinput = "$cmd:$tail";
   
       my ($udom,$uname,$namespace,$regexp)=split(/:/,$tail);
       if (defined($regexp)) {
    $regexp=&unescape($regexp);
       } else {
    $regexp='.';
       }
       my $hashref = &tie_user_hash($udom, $uname, $namespace,
    &GDBM_READER());
       if ($hashref) {
           my $qresult='';
    while (my ($key,$value) = each(%$hashref)) {
       if ($regexp eq '.') {
    $qresult.=$key.'='.$value.'&';
       } else {
    my $unescapeKey = &unescape($key);
    if (eval('$unescapeKey=~/$regexp/')) {
       $qresult.="$key=$value&";
    }
       }
    }
    if (untie(%$hashref)) {
       chop($qresult);
       &Reply($client, "$qresult\n", $userinput);
    } else {
       &Failure( $client, "error: ".($!+0)." untie(GDBM) Failed ".
        "while attempting dump\n", $userinput);
    }
       } else {
    &Failure($client, "error: ".($!+0)." tie(GDBM) Failed ".
    "while attempting dump\n", $userinput);
       }
   
       return 1;
   }
   
   &register_handler("dump", \&dump_with_regexp, 0, 1, 0);
   
   #  Store a set of key=value pairs associated with a versioned name.
   #
   #  Parameters:
   #    $cmd                - Request command keyword.
   #    $tail               - Tail of the request.  This is a colon
   #                          separated list containing:
   #                          domain/user - User and authentication domain.
   #                          namespace   - Name of the database being modified
   #                          rid         - Resource keyword to modify.
   #                          what        - new value associated with rid.
   #
   #    $client             - Socket open on the client.
   #
   #
   #  Returns:
   #      1 (keep on processing).
   #  Side-Effects:
   #    Writes to the client
   sub store_handler {
       my ($cmd, $tail, $client) = @_;
    
       my $userinput = "$cmd:$tail";
   
       my ($udom,$uname,$namespace,$rid,$what) =split(/:/,$tail);
       if ($namespace ne 'roles') {
   
    chomp($what);
    my @pairs=split(/\&/,$what);
    my $hashref  = &tie_user_hash($udom, $uname, $namespace,
          &GDBM_WRCREAT(), "P",
          "$rid:$what");
    if ($hashref) {
       my $now = time;
       my @previouskeys=split(/&/,$hashref->{"keys:$rid"});
       my $key;
       $hashref->{"version:$rid"}++;
       my $version=$hashref->{"version:$rid"};
       my $allkeys=''; 
       foreach my $pair (@pairs) {
    my ($key,$value)=split(/=/,$pair);
    $allkeys.=$key.':';
    $hashref->{"$version:$rid:$key"}=$value;
       }
       $hashref->{"$version:$rid:timestamp"}=$now;
       $allkeys.='timestamp';
       $hashref->{"$version:keys:$rid"}=$allkeys;
       if (untie($hashref)) {
    &Reply($client, "ok\n", $userinput);
       } else {
    &Failure($client, "error: ".($!+0)." untie(GDBM) Failed ".
    "while attempting store\n", $userinput);
       }
    } else {
       &Failure( $client, "error: ".($!+0)." tie(GDBM) Failed ".
        "while attempting store\n", $userinput);
    }
       } else {
    &Failure($client, "refused\n", $userinput);
       }
   
       return 1;
   }
   &register_handler("store", \&store_handler, 0, 1, 0);
   #
   #  Dump out all versions of a resource that has key=value pairs associated
   # with it for each version.  These resources are built up via the store
   # command.
   #
   #  Parameters:
   #     $cmd               - Command keyword.
   #     $tail              - Remainder of the request which consists of:
   #                          domain/user   - User and auth. domain.
   #                          namespace     - name of resource database.
   #                          rid           - Resource id.
   #    $client             - socket open on the client.
   #
   # Returns:
   #      1  indicating the caller should not yet exit.
   # Side-effects:
   #   Writes a reply to the client.
   #   The reply is a string of the following shape:
   #   version=current&version:keys=k1:k2...&1:k1=v1&1:k2=v2...
   #    Where the 1 above represents version 1.
   #    this continues for all pairs of keys in all versions.
   #
   #
   #    
   #
   sub restore_handler {
       my ($cmd, $tail, $client) = @_;
   
       my $userinput = "$cmd:$tail"; # Only used for logging purposes.
   
       my ($cmd,$udom,$uname,$namespace,$rid) = split(/:/,$userinput);
       $namespace=~s/\//\_/g;
       $namespace=~s/\W//g;
       chomp($rid);
       my $proname=&propath($udom,$uname);
       my $qresult='';
       my %hash;
       if (tie(%hash,'GDBM_File',"$proname/$namespace.db",
       &GDBM_READER(),0640)) {
    my $version=$hash{"version:$rid"};
    $qresult.="version=$version&";
    my $scope;
    for ($scope=1;$scope<=$version;$scope++) {
       my $vkeys=$hash{"$scope:keys:$rid"};
       my @keys=split(/:/,$vkeys);
       my $key;
       $qresult.="$scope:keys=$vkeys&";
       foreach $key (@keys) {
    $qresult.="$scope:$key=".$hash{"$scope:$rid:$key"}."&";
       }                                  
    }
    if (untie(%hash)) {
       $qresult=~s/\&$//;
       &Reply( $client, "$qresult\n", $userinput);
    } else {
       &Failure($client, "error: ".($!+0)." untie(GDBM) Failed ".
       "while attempting restore\n", $userinput);
    }
       } else {
    &Failure($client, "error: ".($!+0)." tie(GDBM) Failed ".
    "while attempting restore\n", $userinput);
       }
     
       return 1;
   
   
   }
   &register_handler("restore", \&restore_handler, 0,1,0);
   
   #
   #   Add a chat message to to a discussion board.
   #
   # Parameters:
   #    $cmd                - Request keyword.
   #    $tail               - Tail of the command. A colon separated list
   #                          containing:
   #                          cdom    - Domain on which the chat board lives
   #                          cnum    - Identifier of the discussion group.
   #                          post    - Body of the posting.
   #   $client              - Socket open on the client.
   # Returns:
   #   1    - Indicating caller should keep on processing.
   #
   # Side-effects:
   #   writes a reply to the client.
   #
   #
   sub send_chat_handler {
       my ($cmd, $tail, $client) = @_;
   
       
       my $userinput = "$cmd:$tail";
   
       my ($cdom,$cnum,$newpost)=split(/\:/,$tail);
       &chat_add($cdom,$cnum,$newpost);
       &Reply($client, "ok\n", $userinput);
   
       return 1;
   }
   &register_handler("chatsend", \&send_chat_handler, 0, 1, 0);
   #
   #   Retrieve the set of chat messagss from a discussion board.
   #
   #  Parameters:
   #    $cmd             - Command keyword that initiated the request.
   #    $tail            - Remainder of the request after the command
   #                       keyword.  In this case a colon separated list of
   #                       chat domain    - Which discussion board.
   #                       chat id        - Discussion thread(?)
   #                       domain/user    - Authentication domain and username
   #                                        of the requesting person.
   #   $client           - Socket open on the client program.
   # Returns:
   #    1     - continue processing
   # Side effects:
   #    Response is written to the client.
   #
   sub retrieve_chat_handler {
       my ($cmd, $tail, $client) = @_;
   
   
       my $userinput = "$cmd:$tail";
   
       my ($cdom,$cnum,$udom,$uname)=split(/\:/,$tail);
       my $reply='';
       foreach (&get_chat($cdom,$cnum,$udom,$uname)) {
    $reply.=&escape($_).':';
       }
       $reply=~s/\:$//;
       &Reply($client, $reply."\n", $userinput);
   
   
       return 1;
   }
   &register_handler("chatretr", \&retrieve_chat_handler, 0, 1, 0);
   
   #
   #  Initiate a query of an sql database.  SQL query repsonses get put in
   #  a file for later retrieval.  This prevents sql query results from
   #  bottlenecking the system.  Note that with loncnew, perhaps this is
   #  less of an issue since multiple outstanding requests can be concurrently
   #  serviced.
   #
   #  Parameters:
   #     $cmd       - COmmand keyword that initiated the request.
   #     $tail      - Remainder of the command after the keyword.
   #                  For this function, this consists of a query and
   #                  3 arguments that are self-documentingly labelled
   #                  in the original arg1, arg2, arg3.
   #     $client    - Socket open on the client.
   # Return:
   #    1   - Indicating processing should continue.
   # Side-effects:
   #    a reply is written to $client.
   #
   sub send_query_handler {
       my ($cmd, $tail, $client) = @_;
   
   
       my $userinput = "$cmd:$tail";
   
       my ($query,$arg1,$arg2,$arg3)=split(/\:/,$tail);
       $query=~s/\n*$//g;
       &Reply($client, "". &sql_reply("$clientname\&$query".
    "\&$arg1"."\&$arg2"."\&$arg3")."\n",
     $userinput);
       
       return 1;
   }
   &register_handler("querysend", \&send_query_handler, 0, 1, 0);
   
   #
   #   Add a reply to an sql query.  SQL queries are done asyncrhonously.
   #   The query is submitted via a "querysend" transaction.
   #   There it is passed on to the lonsql daemon, queued and issued to
   #   mysql.
   #     This transaction is invoked when the sql transaction is complete
   #   it stores the query results in flie and indicates query completion.
   #   presumably local software then fetches this response... I'm guessing
   #   the sequence is: lonc does a querysend, we ask lonsql to do it.
   #   lonsql on completion of the query interacts with the lond of our
   #   client to do a query reply storing two files:
   #    - id     - The results of the query.
   #    - id.end - Indicating the transaction completed. 
   #    NOTE: id is a unique id assigned to the query and querysend time.
   # Parameters:
   #    $cmd        - Command keyword that initiated this request.
   #    $tail       - Remainder of the tail.  In this case that's a colon
   #                  separated list containing the query Id and the 
   #                  results of the query.
   #    $client     - Socket open on the client.
   # Return:
   #    1           - Indicating that we should continue processing.
   # Side effects:
   #    ok written to the client.
   #
   sub reply_query_handler {
       my ($cmd, $tail, $client) = @_;
   
   
       my $userinput = "$cmd:$tail";
   
       my ($cmd,$id,$reply)=split(/:/,$userinput); 
       my $store;
       my $execdir=$perlvar{'lonDaemons'};
       if ($store=IO::File->new(">$execdir/tmp/$id")) {
    $reply=~s/\&/\n/g;
    print $store $reply;
    close $store;
    my $store2=IO::File->new(">$execdir/tmp/$id.end");
    print $store2 "done\n";
    close $store2;
    &Reply($client, "ok\n", $userinput);
       } else {
    &Failure($client, "error: ".($!+0)
    ." IO::File->new Failed ".
    "while attempting queryreply\n", $userinput);
       }
    
   
       return 1;
   }
   &register_handler("queryreply", \&reply_query_handler, 0, 1, 0);
   
   #
   #  Process the courseidput request.  Not quite sure what this means
   #  at the system level sense.  It appears a gdbm file in the 
   #  /home/httpd/lonUsers/$domain/nohist_courseids is tied and
   #  a set of entries made in that database.
   #
   # Parameters:
   #   $cmd      - The command keyword that initiated this request.
   #   $tail     - Tail of the command.  In this case consists of a colon
   #               separated list contaning the domain to apply this to and
   #               an ampersand separated list of keyword=value pairs.
   #   $client   - Socket open on the client.
   # Returns:
   #   1    - indicating that processing should continue
   #
   # Side effects:
   #   reply is written to the client.
   #
   sub put_course_id_handler {
       my ($cmd, $tail, $client) = @_;
   
   
       my $userinput = "$cmd:$tail";
   
       my ($udom, $what) = split(/:/, $tail);
       chomp($what);
       my $now=time;
       my @pairs=split(/\&/,$what);
   
       my $hashref = &tie_domain_hash($udom, "nohist_courseids", &GDBM_WRCREAT());
       if ($hashref) {
    foreach my $pair (@pairs) {
       my ($key,$value)=split(/=/,$pair);
       $hashref->{$key}=$value.':'.$now;
    }
    if (untie(%$hashref)) {
       &Reply($client, "ok\n", $userinput);
    } else {
       &Failure( $client, "error: ".($!+0)
        ." untie(GDBM) Failed ".
        "while attempting courseidput\n", $userinput);
    }
       } else {
    &Failure( $client, "error: ".($!+0)
    ." tie(GDBM) Failed ".
    "while attempting courseidput\n", $userinput);
       }
   
       return 1;
   }
   &register_handler("courseidput", \&put_course_id_handler, 0, 1, 0);
   
   #  Retrieves the value of a course id resource keyword pattern
   #  defined since a starting date.  Both the starting date and the
   #  keyword pattern are optional.  If the starting date is not supplied it
   #  is treated as the beginning of time.  If the pattern is not found,
   #  it is treatred as "." matching everything.
   #
   #  Parameters:
   #     $cmd     - Command keyword that resulted in us being dispatched.
   #     $tail    - The remainder of the command that, in this case, consists
   #                of a colon separated list of:
   #                 domain   - The domain in which the course database is 
   #                            defined.
   #                 since    - Optional parameter describing the minimum
   #                            time of definition(?) of the resources that
   #                            will match the dump.
   #                 description - regular expression that is used to filter
   #                            the dump.  Only keywords matching this regexp
   #                            will be used.
   #     $client  - The socket open on the client.
   # Returns:
   #    1     - Continue processing.
   # Side Effects:
   #   a reply is written to $client.
   sub dump_course_id_handler {
       my ($cmd, $tail, $client) = @_;
   
       my $userinput = "$cmd:$tail";
   
       my ($udom,$since,$description) =split(/:/,$tail);
       if (defined($description)) {
    $description=&unescape($description);
       } else {
    $description='.';
       }
       unless (defined($since)) { $since=0; }
       my $qresult='';
       my $hashref = &tie_domain_hash($udom, "nohist_courseids", &GDBM_WRCREAT());
       if ($hashref) {
    while (my ($key,$value) = each(%$hashref)) {
       my ($descr,$lasttime,$inst_code);
       if ($value =~ m/^([^\:]*):([^\:]*):(\d+)$/) {
    ($descr,$inst_code,$lasttime)=($1,$2,$3);
       } else {
    ($descr,$lasttime) = split(/\:/,$value);
       }
       if ($lasttime<$since) { next; }
       if ($description eq '.') {
    $qresult.=$key.'='.$descr.':'.$inst_code.'&';
       } else {
    my $unescapeVal = &unescape($descr);
    if (eval('$unescapeVal=~/\Q$description\E/i')) {
       $qresult.=$key.'='.$descr.':'.$inst_code.'&';
    }
       }
    }
    if (untie(%$hashref)) {
       chop($qresult);
       &Reply($client, "$qresult\n", $userinput);
    } else {
       &Failure($client, "error: ".($!+0)." untie(GDBM) Failed ".
       "while attempting courseiddump\n", $userinput);
    }
       } else {
    &Failure($client, "error: ".($!+0)." tie(GDBM) Failed ".
    "while attempting courseiddump\n", $userinput);
       }
   
   
       return 1;
   }
   &register_handler("courseiddump", \&dump_course_id_handler, 0, 1, 0);
   #
   #
   #
 #---------------------------------------------------------------  #---------------------------------------------------------------
 #  #
 #   Getting, decoding and dispatching requests:  #   Getting, decoding and dispatching requests:
Line 1427  register_handler("auth", \&authenticate_ Line 3073  register_handler("auth", \&authenticate_
 #   Gets a Request message from the client.  The transaction  #   Gets a Request message from the client.  The transaction
 #   is defined as a 'line' of text.  We remove the new line  #   is defined as a 'line' of text.  We remove the new line
 #   from the text line.    #   from the text line.  
 #     #
 sub get_request {  sub get_request {
     my $input = <$client>;      my $input = <$client>;
     chomp($input);      chomp($input);
   
     Debug("get_request: Request = $input\n");      &Debug("get_request: Request = $input\n");
   
     &status('Processing '.$clientname.':'.$input);      &status('Processing '.$clientname.':'.$input);
   
Line 1531  sub process_request { Line 3177  sub process_request {
 #------------------- Commands not yet in spearate handlers. --------------  #------------------- Commands not yet in spearate handlers. --------------
   
   
 # ---------------------------------------------------------------------- passwd  
     if ($userinput =~ /^passwd/) { # encoded and client  
  if (($wasenc==1) && isClient) {  
     my   
  ($cmd,$udom,$uname,$upass,$npass)=split(/:/,$userinput);  
     chomp($npass);  
     $upass=&unescape($upass);  
     $npass=&unescape($npass);  
     &Debug("Trying to change password for $uname");  
     my $proname=propath($udom,$uname);  
     my $passfilename="$proname/passwd";  
     if (-e $passfilename) {  
  my $realpasswd;  
  { my $pf = IO::File->new($passfilename);  
   $realpasswd=<$pf>; }  
  chomp($realpasswd);  
  my ($howpwd,$contentpwd)=split(/:/,$realpasswd);  
  if ($howpwd eq 'internal') {  
     &Debug("internal auth");  
     if (crypt($upass,$contentpwd) eq $contentpwd) {  
  my $salt=time;  
  $salt=substr($salt,6,2);  
  my $ncpass=crypt($npass,$salt);  
  {  
     my $pf;  
     if ($pf = IO::File->new(">$passfilename")) {  
  print $pf "internal:$ncpass\n";  
  &logthis("Result of password change for $uname: pwchange_success");  
  print $client "ok\n";  
     } else {  
  &logthis("Unable to open $uname passwd to change password");  
  print $client "non_authorized\n";  
     }  
  }               
   
     } else {  
  print $client "non_authorized\n";  
     }  
  } elsif ($howpwd eq 'unix') {  
     # Unix means we have to access /etc/password  
     # one way or another.  
     # First: Make sure the current password is  
     #        correct  
     &Debug("auth is unix");  
     $contentpwd=(getpwnam($uname))[1];  
     my $pwdcorrect = "0";  
     my $pwauth_path="/usr/local/sbin/pwauth";  
     unless ($contentpwd eq 'x') {  
  $pwdcorrect=  
     (crypt($upass,$contentpwd) eq $contentpwd);  
     } elsif (-e $pwauth_path) {  
  open PWAUTH, "|$pwauth_path" or  
     die "Cannot invoke authentication";  
  print PWAUTH "$uname\n$upass\n";  
  close PWAUTH;  
  &Debug("exited pwauth with $? ($uname,$upass) ");  
  $pwdcorrect=($? == 0);  
     }  
     if ($pwdcorrect) {  
  my $execdir=$perlvar{'lonDaemons'};  
  &Debug("Opening lcpasswd pipeline");  
  my $pf = IO::File->new("|$execdir/lcpasswd > $perlvar{'lonDaemons'}/logs/lcpasswd.log");  
  print $pf "$uname\n$npass\n$npass\n";  
  close $pf;  
  my $err = $?;  
  my $result = ($err>0 ? 'pwchange_failure'   
       : 'ok');  
  &logthis("Result of password change for $uname: ".  
  &lcpasswdstrerror($?));  
  print $client "$result\n";  
     } else {  
  print $client "non_authorized\n";  
     }  
  } else {  
     print $client "auth_mode_error\n";  
  }    
     } else {  
  print $client "unknown_user\n";  
     }  
  } else {  
     Reply($client, "refused\n", $userinput);  
       
  }  
 # -------------------------------------------------------------------- makeuser  
     } elsif ($userinput =~ /^makeuser/) { # encoded and client.  
  &Debug("Make user received");  
  my $oldumask=umask(0077);  
  if (($wasenc==1) && isClient) {  
     my   
  ($cmd,$udom,$uname,$umode,$npass)=split(/:/,$userinput);  
     &Debug("cmd =".$cmd." $udom =".$udom.  
    " uname=".$uname);  
     chomp($npass);  
     $npass=&unescape($npass);  
     my $proname=propath($udom,$uname);  
     my $passfilename="$proname/passwd";  
     &Debug("Password file created will be:".  
    $passfilename);  
     if (-e $passfilename) {  
  print $client "already_exists\n";  
     } elsif ($udom ne $currentdomainid) {  
  print $client "not_right_domain\n";  
     } else {  
  my @fpparts=split(/\//,$proname);  
  my $fpnow=$fpparts[0].'/'.$fpparts[1].'/'.$fpparts[2];  
  my $fperror='';  
  for (my $i=3;$i<=$#fpparts;$i++) {  
     $fpnow.='/'.$fpparts[$i];   
     unless (-e $fpnow) {  
  unless (mkdir($fpnow,0777)) {  
     $fperror="error: ".($!+0)  
  ." mkdir failed while attempting "  
  ."makeuser";  
  }  
     }  
  }  
  unless ($fperror) {  
     my $result=&make_passwd_file($uname, $umode,$npass,  
  $passfilename);  
     print $client $result;  
  } else {  
     print $client "$fperror\n";  
  }  
     }  
  } else {  
     Reply($client, "refused\n", $userinput);  
       
  }  
  umask($oldumask);  
 # -------------------------------------------------------------- changeuserauth  
     } elsif ($userinput =~ /^changeuserauth/) { # encoded & client  
  &Debug("Changing authorization");  
  if (($wasenc==1) && isClient) {  
     my   
  ($cmd,$udom,$uname,$umode,$npass)=split(/:/,$userinput);  
     chomp($npass);  
     &Debug("cmd = ".$cmd." domain= ".$udom.  
    "uname =".$uname." umode= ".$umode);  
     $npass=&unescape($npass);  
     my $proname=&propath($udom,$uname);  
     my $passfilename="$proname/passwd";  
     if ($udom ne $currentdomainid) {  
  print $client "not_right_domain\n";  
     } else {  
  my $result=&make_passwd_file($uname, $umode,$npass,  
      $passfilename);  
  print $client $result;  
     }  
  } else {  
     Reply($client, "refused\n", $userinput);  
       
  }  
 # ------------------------------------------------------------------------ home  
     } elsif ($userinput =~ /^home/) { # client clear or encoded  
  if(isClient) {  
     my ($cmd,$udom,$uname)=split(/:/,$userinput);  
     chomp($uname);  
     my $proname=propath($udom,$uname);  
     if (-e $proname) {  
  print $client "found\n";  
     } else {  
  print $client "not_found\n";  
     }  
  } else {  
     Reply($client, "refused\n", $userinput);  
       
  }  
 # ---------------------------------------------------------------------- update  
     } elsif ($userinput =~ /^update/) { # client clear or encoded.  
  if(isClient) {  
     my ($cmd,$fname)=split(/:/,$userinput);  
     my $ownership=ishome($fname);  
     if ($ownership eq 'not_owner') {  
  if (-e $fname) {  
     my ($dev,$ino,$mode,$nlink,  
  $uid,$gid,$rdev,$size,  
  $atime,$mtime,$ctime,  
  $blksize,$blocks)=stat($fname);  
     my $now=time;  
     my $since=$now-$atime;  
     if ($since>$perlvar{'lonExpire'}) {  
  my $reply=  
     &reply("unsub:$fname","$clientname");  
     unlink("$fname");  
     } else {  
  my $transname="$fname.in.transfer";  
  my $remoteurl=  
     &reply("sub:$fname","$clientname");  
  my $response;  
  {  
     my $ua=new LWP::UserAgent;  
     my $request=new HTTP::Request('GET',"$remoteurl");  
     $response=$ua->request($request,$transname);  
  }  
  if ($response->is_error()) {  
     unlink($transname);  
     my $message=$response->status_line;  
     &logthis(  
      "LWP GET: $message for $fname ($remoteurl)");  
  } else {  
     if ($remoteurl!~/\.meta$/) {  
  my $ua=new LWP::UserAgent;  
  my $mrequest=  
     new HTTP::Request('GET',$remoteurl.'.meta');  
  my $mresponse=  
     $ua->request($mrequest,$fname.'.meta');  
  if ($mresponse->is_error()) {  
     unlink($fname.'.meta');  
  }  
     }  
     rename($transname,$fname);  
  }  
     }  
     print $client "ok\n";  
  } else {  
     print $client "not_found\n";  
  }  
     } else {  
  print $client "rejected\n";  
     }  
  } else {  
     Reply($client, "refused\n", $userinput);  
       
  }  
 # -------------------------------------- fetch a user file from a remote server  
     } elsif ($userinput =~ /^fetchuserfile/) { # Client clear or enc.  
  if(isClient) {  
     my ($cmd,$fname)=split(/:/,$userinput);  
     my ($udom,$uname,$ufile) = ($fname =~ m|^([^/]+)/([^/]+)/(.+)$|);  
     my $udir=propath($udom,$uname).'/userfiles';  
     unless (-e $udir) { mkdir($udir,0770); }  
     if (-e $udir) {  
  $ufile=~s/^[\.\~]+//;  
  my $path = $udir;  
  if ($ufile =~m|(.+)/([^/]+)$|) {  
     my @parts=split('/',$1);  
     foreach my $part (@parts) {  
  $path .= '/'.$part;  
  if ((-e $path)!=1) {  
     mkdir($path,0770);  
  }  
     }  
  }  
  my $destname=$udir.'/'.$ufile;  
  my $transname=$udir.'/'.$ufile.'.in.transit';  
  my $remoteurl='http://'.$clientip.'/userfiles/'.$fname;  
  my $response;  
  {  
     my $ua=new LWP::UserAgent;  
     my $request=new HTTP::Request('GET',"$remoteurl");  
     $response=$ua->request($request,$transname);  
  }  
  if ($response->is_error()) {  
     unlink($transname);  
     my $message=$response->status_line;  
     &logthis("LWP GET: $message for $fname ($remoteurl)");  
     print $client "failed\n";  
  } else {  
     if (!rename($transname,$destname)) {  
  &logthis("Unable to move $transname to $destname");  
  unlink($transname);  
  print $client "failed\n";  
     } else {  
  print $client "ok\n";  
     }  
  }  
     } else {  
  print $client "not_home\n";  
     }  
  } else {  
     Reply($client, "refused\n", $userinput);  
  }  
 # --------------------------------------------------------- remove a user file   
     } elsif ($userinput =~ /^removeuserfile/) { # Client clear or enc.  
  if(isClient) {  
     my ($cmd,$fname)=split(/:/,$userinput);  
     my ($udom,$uname,$ufile) = ($fname =~ m|^([^/]+)/([^/]+)/(.+)$|);  
     &logthis("$udom - $uname - $ufile");  
     if ($ufile =~m|/\.\./|) {  
  # any files paths with /../ in them refuse   
  # to deal with  
  print $client "refused\n";  
     } else {  
  my $udir=propath($udom,$uname);  
  if (-e $udir) {  
     my $file=$udir.'/userfiles/'.$ufile;  
     if (-e $file) {  
  unlink($file);  
  if (-e $file) {  
     print $client "failed\n";  
  } else {  
     print $client "ok\n";  
  }  
     } else {  
  print $client "not_found\n";  
     }  
  } else {  
     print $client "not_home\n";  
  }  
     }  
  } else {  
     Reply($client, "refused\n", $userinput);  
  }  
 # ------------------------------------------ authenticate access to a user file  
     } elsif ($userinput =~ /^tokenauthuserfile/) { # Client only  
  if(isClient) {  
     my ($cmd,$fname,$session)=split(/:/,$userinput);  
     chomp($session);  
     my $reply='non_auth';  
     if (open(ENVIN,$perlvar{'lonIDsDir'}.'/'.  
      $session.'.id')) {  
  while (my $line=<ENVIN>) {  
     if ($line=~ m|userfile\.\Q$fname\E\=|) { $reply='ok'; }  
     }  
  close(ENVIN);  
  print $client $reply."\n";  
     } else {  
  print $client "invalid_token\n";  
     }  
  } else {  
     Reply($client, "refused\n", $userinput);  
       
  }  
 # ----------------------------------------------------------------- unsubscribe  
     } elsif ($userinput =~ /^unsub/) {  
  if(isClient) {  
     my ($cmd,$fname)=split(/:/,$userinput);  
     if (-e $fname) {  
  print $client &unsub($fname,$clientip);  
     } else {  
  print $client "not_found\n";  
     }  
  } else {  
     Reply($client, "refused\n", $userinput);  
       
  }  
 # ------------------------------------------------------------------- subscribe  
     } elsif ($userinput =~ /^sub/) {  
  if(isClient) {  
     print $client &subscribe($userinput,$clientip);  
  } else {  
     Reply($client, "refused\n", $userinput);  
       
  }  
 # ------------------------------------------------------------- current version  
     } elsif ($userinput =~ /^currentversion/) {  
  if(isClient) {  
     my ($cmd,$fname)=split(/:/,$userinput);  
     print $client &currentversion($fname)."\n";  
  } else {  
     Reply($client, "refused\n", $userinput);  
       
  }  
 # ------------------------------------------------------------------------- log  
     } elsif ($userinput =~ /^log/) {  
  if(isClient) {  
     my ($cmd,$udom,$uname,$what)=split(/:/,$userinput);  
     chomp($what);  
     my $proname=propath($udom,$uname);  
     my $now=time;  
     {  
  my $hfh;  
  if ($hfh=IO::File->new(">>$proname/activity.log")) {   
     print $hfh "$now:$clientname:$what\n";  
     print $client "ok\n";   
  } else {  
     print $client "error: ".($!+0)  
  ." IO::File->new Failed "  
  ."while attempting log\n";  
  }  
     }  
  } else {  
     Reply($client, "refused\n", $userinput);  
       
  }  
 # ------------------------------------------------------------------------- put  
     } elsif ($userinput =~ /^put/) {  
  if(isClient) {  
     my ($cmd,$udom,$uname,$namespace,$what)  
  =split(/:/,$userinput,5);  
     $namespace=~s/\//\_/g;  
     $namespace=~s/\W//g;  
     if ($namespace ne 'roles') {  
  chomp($what);  
  my $proname=propath($udom,$uname);  
  my $now=time;  
  my @pairs=split(/\&/,$what);  
  my %hash;  
  if (tie(%hash,'GDBM_File',  
  "$proname/$namespace.db",  
  &GDBM_WRCREAT(),0640)) {  
     unless ($namespace=~/^nohist\_/) {  
  my $hfh;  
  if ($hfh=IO::File->new(">>$proname/$namespace.hist")) { print $hfh "P:$now:$what\n"; }  
     }  
       
     foreach my $pair (@pairs) {  
  my ($key,$value)=split(/=/,$pair);  
  $hash{$key}=$value;  
     }  
     if (untie(%hash)) {  
  print $client "ok\n";  
     } else {  
  print $client "error: ".($!+0)  
     ." untie(GDBM) failed ".  
     "while attempting put\n";  
     }  
  } else {  
     print $client "error: ".($!)  
  ." tie(GDBM) Failed ".  
  "while attempting put\n";  
  }  
     } else {  
  print $client "refused\n";  
     }  
  } else {  
     Reply($client, "refused\n", $userinput);  
       
  }  
 # ------------------------------------------------------------------- inc  
     } elsif ($userinput =~ /^inc:/) {  
  if(isClient) {  
     my ($cmd,$udom,$uname,$namespace,$what)  
  =split(/:/,$userinput);  
     $namespace=~s/\//\_/g;  
     $namespace=~s/\W//g;  
     if ($namespace ne 'roles') {  
  chomp($what);  
  my $proname=propath($udom,$uname);  
  my $now=time;  
  my @pairs=split(/\&/,$what);  
  my %hash;  
  if (tie(%hash,'GDBM_File',  
  "$proname/$namespace.db",  
  &GDBM_WRCREAT(),0640)) {  
     unless ($namespace=~/^nohist\_/) {  
  my $hfh;  
  if ($hfh=IO::File->new(">>$proname/$namespace.hist")) { print $hfh "P:$now:$what\n"; }  
     }  
     foreach my $pair (@pairs) {  
  my ($key,$value)=split(/=/,$pair);  
  # We could check that we have a number...  
  if (! defined($value) || $value eq '') {  
     $value = 1;  
  }  
  $hash{$key}+=$value;  
     }  
     if (untie(%hash)) {  
  print $client "ok\n";  
     } else {  
  print $client "error: ".($!+0)  
     ." untie(GDBM) failed ".  
     "while attempting inc\n";  
     }  
  } else {  
     print $client "error: ".($!)  
  ." tie(GDBM) Failed ".  
  "while attempting inc\n";  
  }  
     } else {  
  print $client "refused\n";  
     }  
  } else {  
     Reply($client, "refused\n", $userinput);  
       
  }  
 # -------------------------------------------------------------------- rolesput  
     } elsif ($userinput =~ /^rolesput/) {  
  if(isClient) {  
     &Debug("rolesput");  
     if ($wasenc==1) {  
  my ($cmd,$exedom,$exeuser,$udom,$uname,$what)  
     =split(/:/,$userinput);  
  &Debug("cmd = ".$cmd." exedom= ".$exedom.  
        "user = ".$exeuser." udom=".$udom.  
        "what = ".$what);  
  my $namespace='roles';  
  chomp($what);  
  my $proname=propath($udom,$uname);  
  my $now=time;  
  my @pairs=split(/\&/,$what);  
  my %hash;  
  if (tie(%hash,'GDBM_File',"$proname/$namespace.db",&GDBM_WRCREAT(),0640)) {  
     {  
  my $hfh;  
  if ($hfh=IO::File->new(">>$proname/$namespace.hist")) {   
     print $hfh "P:$now:$exedom:$exeuser:$what\n";  
  }  
     }  
       
     foreach my $pair (@pairs) {  
  my ($key,$value)=split(/=/,$pair);  
  &ManagePermissions($key, $udom, $uname,  
    &GetAuthType( $udom,   
  $uname));  
  $hash{$key}=$value;  
     }  
     if (untie(%hash)) {  
  print $client "ok\n";  
     } else {  
  print $client "error: ".($!+0)  
     ." untie(GDBM) Failed ".  
     "while attempting rolesput\n";  
     }  
  } else {  
     print $client "error: ".($!+0)  
  ." tie(GDBM) Failed ".  
  "while attempting rolesput\n";  
     }  
     } else {  
  print $client "refused\n";  
     }  
  } else {  
     Reply($client, "refused\n", $userinput);  
       
  }  
 # -------------------------------------------------------------------- rolesdel  
     } elsif ($userinput =~ /^rolesdel/) {  
  if(isClient) {  
     &Debug("rolesdel");  
     if ($wasenc==1) {  
  my ($cmd,$exedom,$exeuser,$udom,$uname,$what)  
     =split(/:/,$userinput);  
  &Debug("cmd = ".$cmd." exedom= ".$exedom.  
        "user = ".$exeuser." udom=".$udom.  
        "what = ".$what);  
  my $namespace='roles';  
  chomp($what);  
  my $proname=propath($udom,$uname);  
  my $now=time;  
  my @rolekeys=split(/\&/,$what);  
  my %hash;  
  if (tie(%hash,'GDBM_File',"$proname/$namespace.db",&GDBM_WRCREAT(),0640)) {  
     {  
  my $hfh;  
  if ($hfh=IO::File->new(">>$proname/$namespace.hist")) {   
     print $hfh "D:$now:$exedom:$exeuser:$what\n";  
  }  
     }  
     foreach my $key (@rolekeys) {  
  delete $hash{$key};  
     }  
     if (untie(%hash)) {  
  print $client "ok\n";  
     } else {  
  print $client "error: ".($!+0)  
     ." untie(GDBM) Failed ".  
     "while attempting rolesdel\n";  
     }  
  } else {  
     print $client "error: ".($!+0)  
  ." tie(GDBM) Failed ".  
  "while attempting rolesdel\n";  
  }  
     } else {  
  print $client "refused\n";  
     }  
  } else {  
     Reply($client, "refused\n", $userinput);  
       
  }  
 # ------------------------------------------------------------------------- get  
     } elsif ($userinput =~ /^get/) {  
  if(isClient) {  
     my ($cmd,$udom,$uname,$namespace,$what)  
  =split(/:/,$userinput);  
     $namespace=~s/\//\_/g;  
     $namespace=~s/\W//g;  
     chomp($what);  
     my @queries=split(/\&/,$what);  
     my $proname=propath($udom,$uname);  
     my $qresult='';  
     my %hash;  
     if (tie(%hash,'GDBM_File',"$proname/$namespace.db",&GDBM_READER(),0640)) {  
  for (my $i=0;$i<=$#queries;$i++) {  
     $qresult.="$hash{$queries[$i]}&";  
  }  
  if (untie(%hash)) {  
     $qresult=~s/\&$//;  
     print $client "$qresult\n";  
  } else {  
     print $client "error: ".($!+0)  
  ." untie(GDBM) Failed ".  
  "while attempting get\n";  
  }  
     } else {  
  if ($!+0 == 2) {  
     print $client "error:No such file or ".  
  "GDBM reported bad block error\n";  
  } else {  
     print $client "error: ".($!+0)  
  ." tie(GDBM) Failed ".  
  "while attempting get\n";  
  }  
     }  
  } else {  
     Reply($client, "refused\n", $userinput);  
       
  }  
 # ------------------------------------------------------------------------ eget  
     } elsif ($userinput =~ /^eget/) {  
  if (isClient) {  
     my ($cmd,$udom,$uname,$namespace,$what)  
  =split(/:/,$userinput);  
     $namespace=~s/\//\_/g;  
     $namespace=~s/\W//g;  
     chomp($what);  
     my @queries=split(/\&/,$what);  
     my $proname=propath($udom,$uname);  
     my $qresult='';  
     my %hash;  
     if (tie(%hash,'GDBM_File',"$proname/$namespace.db",&GDBM_READER(),0640)) {  
  for (my $i=0;$i<=$#queries;$i++) {  
     $qresult.="$hash{$queries[$i]}&";  
  }  
  if (untie(%hash)) {  
     $qresult=~s/\&$//;  
     if ($cipher) {  
  my $cmdlength=length($qresult);  
  $qresult.="         ";  
  my $encqresult='';  
  for   
     (my $encidx=0;$encidx<=$cmdlength;$encidx+=8) {  
  $encqresult.=  
     unpack("H16",  
    $cipher->encrypt(substr($qresult,$encidx,8)));  
     }  
  print $client "enc:$cmdlength:$encqresult\n";  
     } else {  
  print $client "error:no_key\n";  
     }  
  } else {  
     print $client "error: ".($!+0)  
  ." untie(GDBM) Failed ".  
  "while attempting eget\n";  
  }  
     } else {  
  print $client "error: ".($!+0)  
     ." tie(GDBM) Failed ".  
     "while attempting eget\n";  
     }  
  } else {  
     Reply($client, "refused\n", $userinput);  
       
  }  
 # ------------------------------------------------------------------------- del  
     } elsif ($userinput =~ /^del/) {  
  if(isClient) {  
     my ($cmd,$udom,$uname,$namespace,$what)  
  =split(/:/,$userinput);  
     $namespace=~s/\//\_/g;  
     $namespace=~s/\W//g;  
     chomp($what);  
     my $proname=propath($udom,$uname);  
     my $now=time;  
     my @keys=split(/\&/,$what);  
     my %hash;  
     if (tie(%hash,'GDBM_File',"$proname/$namespace.db",&GDBM_WRCREAT(),0640)) {  
  unless ($namespace=~/^nohist\_/) {  
     my $hfh;  
     if ($hfh=IO::File->new(">>$proname/$namespace.hist")) { print $hfh "D:$now:$what\n"; }  
  }  
  foreach my $key (@keys) {  
     delete($hash{$key});  
  }  
  if (untie(%hash)) {  
     print $client "ok\n";  
  } else {  
     print $client "error: ".($!+0)  
  ." untie(GDBM) Failed ".  
  "while attempting del\n";  
  }  
     } else {  
  print $client "error: ".($!+0)  
     ." tie(GDBM) Failed ".  
     "while attempting del\n";  
     }  
  } else {  
     Reply($client, "refused\n", $userinput);  
       
  }  
 # ------------------------------------------------------------------------ keys  
     } elsif ($userinput =~ /^keys/) {  
  if(isClient) {  
     my ($cmd,$udom,$uname,$namespace)  
  =split(/:/,$userinput);  
     $namespace=~s/\//\_/g;  
     $namespace=~s/\W//g;  
     my $proname=propath($udom,$uname);  
     my $qresult='';  
     my %hash;  
     if (tie(%hash,'GDBM_File',"$proname/$namespace.db",&GDBM_READER(),0640)) {  
  foreach my $key (keys %hash) {  
     $qresult.="$key&";  
  }  
  if (untie(%hash)) {  
     $qresult=~s/\&$//;  
     print $client "$qresult\n";  
  } else {  
     print $client "error: ".($!+0)  
  ." untie(GDBM) Failed ".  
  "while attempting keys\n";  
  }  
     } else {  
  print $client "error: ".($!+0)  
     ." tie(GDBM) Failed ".  
     "while attempting keys\n";  
     }  
  } else {  
     Reply($client, "refused\n", $userinput);  
       
  }  
 # ----------------------------------------------------------------- dumpcurrent  
     } elsif ($userinput =~ /^currentdump/) {  
  if (isClient) {  
     my ($cmd,$udom,$uname,$namespace)  
  =split(/:/,$userinput);  
     $namespace=~s/\//\_/g;  
     $namespace=~s/\W//g;  
     my $qresult='';  
     my $proname=propath($udom,$uname);  
     my %hash;  
     if (tie(%hash,'GDBM_File',  
     "$proname/$namespace.db",  
     &GDBM_READER(),0640)) {  
     # Structure of %data:  
  # $data{$symb}->{$parameter}=$value;  
  # $data{$symb}->{'v.'.$parameter}=$version;  
  # since $parameter will be unescaped, we do not  
  # have to worry about silly parameter names...  
  my %data = ();  
  while (my ($key,$value) = each(%hash)) {  
     my ($v,$symb,$param) = split(/:/,$key);  
     next if ($v eq 'version' || $symb eq 'keys');  
     next if (exists($data{$symb}) &&   
      exists($data{$symb}->{$param}) &&  
      $data{$symb}->{'v.'.$param} > $v);  
     $data{$symb}->{$param}=$value;  
     $data{$symb}->{'v.'.$param}=$v;  
  }  
  if (untie(%hash)) {  
     while (my ($symb,$param_hash) = each(%data)) {  
  while(my ($param,$value) = each (%$param_hash)){  
     next if ($param =~ /^v\./);  
     $qresult.=$symb.':'.$param.'='.$value.'&';  
  }  
     }  
     chop($qresult);  
     print $client "$qresult\n";  
  } else {  
     print $client "error: ".($!+0)  
  ." untie(GDBM) Failed ".  
  "while attempting currentdump\n";  
  }  
     } else {  
  print $client "error: ".($!+0)  
     ." tie(GDBM) Failed ".  
     "while attempting currentdump\n";  
     }  
  } else {  
     Reply($client, "refused\n", $userinput);  
  }  
 # ------------------------------------------------------------------------ dump  
     } elsif ($userinput =~ /^dump/) {  
  if(isClient) {  
     my ($cmd,$udom,$uname,$namespace,$regexp)  
  =split(/:/,$userinput);  
     $namespace=~s/\//\_/g;  
     $namespace=~s/\W//g;  
     if (defined($regexp)) {  
  $regexp=&unescape($regexp);  
     } else {  
  $regexp='.';  
     }  
     my $qresult='';  
     my $proname=propath($udom,$uname);  
     my %hash;  
     if (tie(%hash,'GDBM_File',"$proname/$namespace.db",&GDBM_READER(),0640)) {  
  while (my ($key,$value) = each(%hash)) {  
     if ($regexp eq '.') {  
  $qresult.=$key.'='.$value.'&';  
     } else {  
  my $unescapeKey = &unescape($key);  
  if (eval('$unescapeKey=~/$regexp/')) {  
     $qresult.="$key=$value&";  
  }  
     }  
  }  
  if (untie(%hash)) {  
     chop($qresult);  
     print $client "$qresult\n";  
  } else {  
     print $client "error: ".($!+0)  
  ." untie(GDBM) Failed ".  
  "while attempting dump\n";  
  }  
     } else {  
  print $client "error: ".($!+0)  
     ." tie(GDBM) Failed ".  
     "while attempting dump\n";  
     }  
  } else {  
     Reply($client, "refused\n", $userinput);  
       
  }  
 # ----------------------------------------------------------------------- store  
     } elsif ($userinput =~ /^store/) {  
  if(isClient) {  
     my ($cmd,$udom,$uname,$namespace,$rid,$what)  
  =split(/:/,$userinput);  
     $namespace=~s/\//\_/g;  
     $namespace=~s/\W//g;  
     if ($namespace ne 'roles') {  
  chomp($what);  
  my $proname=propath($udom,$uname);  
  my $now=time;  
  my @pairs=split(/\&/,$what);  
  my %hash;  
  if (tie(%hash,'GDBM_File',"$proname/$namespace.db",&GDBM_WRCREAT(),0640)) {  
     unless ($namespace=~/^nohist\_/) {  
  my $hfh;  
  if ($hfh=IO::File->new(">>$proname/$namespace.hist")) {  
     print $hfh "P:$now:$rid:$what\n";  
  }  
     }  
     my @previouskeys=split(/&/,$hash{"keys:$rid"});  
     my $key;  
     $hash{"version:$rid"}++;  
     my $version=$hash{"version:$rid"};  
     my $allkeys='';   
     foreach my $pair (@pairs) {  
  my ($key,$value)=split(/=/,$pair);  
  $allkeys.=$key.':';  
  $hash{"$version:$rid:$key"}=$value;  
     }  
     $hash{"$version:$rid:timestamp"}=$now;  
     $allkeys.='timestamp';  
     $hash{"$version:keys:$rid"}=$allkeys;  
     if (untie(%hash)) {  
  print $client "ok\n";  
     } else {  
  print $client "error: ".($!+0)  
     ." untie(GDBM) Failed ".  
     "while attempting store\n";  
  }  
  } else {  
     print $client "error: ".($!+0)  
  ." tie(GDBM) Failed ".  
  "while attempting store\n";  
  }  
     } else {  
  print $client "refused\n";  
     }  
  } else {  
     Reply($client, "refused\n", $userinput);  
       
  }  
 # --------------------------------------------------------------------- restore  
     } elsif ($userinput =~ /^restore/) {  
  if(isClient) {  
     my ($cmd,$udom,$uname,$namespace,$rid)  
  =split(/:/,$userinput);  
     $namespace=~s/\//\_/g;  
     $namespace=~s/\W//g;  
     chomp($rid);  
     my $proname=propath($udom,$uname);  
     my $qresult='';  
     my %hash;  
     if (tie(%hash,'GDBM_File',"$proname/$namespace.db",&GDBM_READER(),0640)) {  
  my $version=$hash{"version:$rid"};  
  $qresult.="version=$version&";  
  my $scope;  
  for ($scope=1;$scope<=$version;$scope++) {  
     my $vkeys=$hash{"$scope:keys:$rid"};  
     my @keys=split(/:/,$vkeys);  
     my $key;  
     $qresult.="$scope:keys=$vkeys&";  
     foreach $key (@keys) {  
  $qresult.="$scope:$key=".$hash{"$scope:$rid:$key"}."&";  
     }                                    
  }  
  if (untie(%hash)) {  
     $qresult=~s/\&$//;  
     print $client "$qresult\n";  
  } else {  
     print $client "error: ".($!+0)  
  ." untie(GDBM) Failed ".  
  "while attempting restore\n";  
  }  
     } else {  
  print $client "error: ".($!+0)  
     ." tie(GDBM) Failed ".  
     "while attempting restore\n";  
     }  
  } else  {  
     Reply($client, "refused\n", $userinput);  
       
  }  
 # -------------------------------------------------------------------- chatsend  
     } elsif ($userinput =~ /^chatsend/) {  
  if(isClient) {  
     my ($cmd,$cdom,$cnum,$newpost)=split(/\:/,$userinput);  
     &chatadd($cdom,$cnum,$newpost);  
     print $client "ok\n";  
  } else {  
     Reply($client, "refused\n", $userinput);  
       
  }  
 # -------------------------------------------------------------------- chatretr  
     } elsif ($userinput =~ /^chatretr/) {  
  if(isClient) {  
     my   
  ($cmd,$cdom,$cnum,$udom,$uname)=split(/\:/,$userinput);  
     my $reply='';  
     foreach (&getchat($cdom,$cnum,$udom,$uname)) {  
  $reply.=&escape($_).':';  
     }  
     $reply=~s/\:$//;  
     print $client $reply."\n";  
  } else {  
     Reply($client, "refused\n", $userinput);  
       
  }  
 # ------------------------------------------------------------------- querysend  
     } elsif ($userinput =~ /^querysend/) {  
  if (isClient) {  
     my ($cmd,$query,  
  $arg1,$arg2,$arg3)=split(/\:/,$userinput);  
     $query=~s/\n*$//g;  
     print $client "".  
  sqlreply("$clientname\&$query".  
  "\&$arg1"."\&$arg2"."\&$arg3")."\n";  
  } else {  
     Reply($client, "refused\n", $userinput);  
       
  }  
 # ------------------------------------------------------------------ queryreply  
     } elsif ($userinput =~ /^queryreply/) {  
  if(isClient) {  
     my ($cmd,$id,$reply)=split(/:/,$userinput);   
     my $store;  
     my $execdir=$perlvar{'lonDaemons'};  
     if ($store=IO::File->new(">$execdir/tmp/$id")) {  
  $reply=~s/\&/\n/g;  
  print $store $reply;  
  close $store;  
  my $store2=IO::File->new(">$execdir/tmp/$id.end");  
  print $store2 "done\n";  
  close $store2;  
  print $client "ok\n";  
     }  
     else {  
  print $client "error: ".($!+0)  
     ." IO::File->new Failed ".  
     "while attempting queryreply\n";  
     }  
  } else {  
     Reply($client, "refused\n", $userinput);  
       
  }  
 # ----------------------------------------------------------------- courseidput  
     } elsif ($userinput =~ /^courseidput/) {  
  if(isClient) {  
     my ($cmd,$udom,$what)=split(/:/,$userinput);  
     chomp($what);  
  $udom=~s/\W//g;  
     my $proname=  
  "$perlvar{'lonUsersDir'}/$udom/nohist_courseids";  
     my $now=time;  
     my @pairs=split(/\&/,$what);  
     my %hash;  
     if (tie(%hash,'GDBM_File',"$proname.db",&GDBM_WRCREAT(),0640)) {  
  foreach my $pair (@pairs) {  
     my ($key,$descr,$inst_code)=split(/=/,$pair);  
     $hash{$key}=$descr.':'.$inst_code.':'.$now;  
  }  
  if (untie(%hash)) {  
     print $client "ok\n";  
  } else {  
     print $client "error: ".($!+0)  
  ." untie(GDBM) Failed ".  
  "while attempting courseidput\n";  
  }  
     } else {  
  print $client "error: ".($!+0)  
     ." tie(GDBM) Failed ".  
     "while attempting courseidput\n";  
     }  
  } else {  
     Reply($client, "refused\n", $userinput);  
       
  }  
 # ---------------------------------------------------------------- courseiddump  
     } elsif ($userinput =~ /^courseiddump/) {  
  if(isClient) {  
     my ($cmd,$udom,$since,$description)  
  =split(/:/,$userinput);  
     if (defined($description)) {  
  $description=&unescape($description);  
     } else {  
  $description='.';  
     }  
     unless (defined($since)) { $since=0; }  
     my $qresult='';  
     my $proname=  
  "$perlvar{'lonUsersDir'}/$udom/nohist_courseids";  
     my %hash;  
     if (tie(%hash,'GDBM_File',"$proname.db",&GDBM_READER(),0640)) {  
  while (my ($key,$value) = each(%hash)) {  
     my ($descr,$lasttime,$inst_code);  
     if ($value =~ m/^([^\:]*):([^\:]*):(\d+)$/) {  
  ($descr,$inst_code,$lasttime)=($1,$2,$3);  
     } else {  
  ($descr,$lasttime) = split(/\:/,$value);  
     }  
     if ($lasttime<$since) { next; }  
     if ($description eq '.') {  
  $qresult.=$key.'='.$descr.':'.$inst_code.'&';  
     } else {  
  my $unescapeVal = &unescape($descr);  
  if (eval('$unescapeVal=~/\Q$description\E/i')) {  
     $qresult.=$key.'='.$descr.':'.$inst_code.'&';  
  }  
     }  
  }  
  if (untie(%hash)) {  
     chop($qresult);  
     print $client "$qresult\n";  
  } else {  
     print $client "error: ".($!+0)  
  ." untie(GDBM) Failed ".  
  "while attempting courseiddump\n";  
  }  
     } else {  
  print $client "error: ".($!+0)  
     ." tie(GDBM) Failed ".  
     "while attempting courseiddump\n";  
     }  
  } else {  
     Reply($client, "refused\n", $userinput);  
       
  }  
 # ----------------------------------------------------------------------- idput  # ----------------------------------------------------------------------- idput
     } elsif ($userinput =~ /^idput/) {      if ($userinput =~ /^idput/) {
  if(isClient) {   if(isClient) {
     my ($cmd,$udom,$what)=split(/:/,$userinput);      my ($cmd,$udom,$what)=split(/:/,$userinput);
     chomp($what);      chomp($what);
Line 2706  sub process_request { Line 3310  sub process_request {
     Reply($client, "refused\n", $userinput);      Reply($client, "refused\n", $userinput);
           
  }   }
 # ----------------------------------------- portfolio directory list (portls)  
     } elsif ($userinput =~ /^portls/) {  
  if(isClient) {  
     my ($cmd,$uname,$udom)=split(/:/,$userinput);  
     my $udir=propath($udom,$uname).'/userfiles/portfolio';  
     my $dirLine='';  
     my $dirContents='';  
     if (opendir(LSDIR,$udir.'/')){  
  while ($dirLine = readdir(LSDIR)){  
     $dirContents = $dirContents.$dirLine.'<br />';  
  }  
     } else {  
  $dirContents = "No directory found\n";  
     }  
     print $client $dirContents."\n";  
  } else {  
     Reply($client, "refused\n", $userinput);  
  }  
 # -------------------------------------------------------------------------- ls  # -------------------------------------------------------------------------- ls
     } elsif ($userinput =~ /^ls/) {      } elsif ($userinput =~ /^ls/) {
  if(isClient) {   if(isClient) {
Line 2797  sub process_request { Line 3383  sub process_request {
  return 0;   return 0;
   
 # ---------------------------------- set current host/domain  # ---------------------------------- set current host/domain
     } elsif ($userinput =~ /^sethost:/) {      } elsif ($userinput =~ /^sethost/) {
  if (isClient) {   if (isClient) {
     print $client &sethost($userinput)."\n";      print $client &sethost($userinput)."\n";
  } else {   } else {
     print $client "refused\n";      print $client "refused\n";
  }   }
 #---------------------------------- request file (?) version.  #---------------------------------- request file (?) version.
     } elsif ($userinput =~/^version:/) {      } elsif ($userinput =~/^version/) {
  if (isClient) {   if (isClient) {
     print $client &version($userinput)."\n";      print $client &version($userinput)."\n";
  } else {   } else {
     print $client "refused\n";      print $client "refused\n";
  }   }
 #------------------------------- is auto-enrollment enabled?  #------------------------------- is auto-enrollment enabled?
     } elsif ($userinput =~/^autorun:/) {      } elsif ($userinput =~/^autorun/) {
  if (isClient) {   if (isClient) {
     my ($cmd,$cdom) = split(/:/,$userinput);      my ($cmd,$cdom) = split(/:/,$userinput);
     my $outcome = &localenroll::run($cdom);      my $outcome = &localenroll::run($cdom);
Line 2820  sub process_request { Line 3406  sub process_request {
     print $client "0\n";      print $client "0\n";
  }   }
 #------------------------------- get official sections (for auto-enrollment).  #------------------------------- get official sections (for auto-enrollment).
     } elsif ($userinput =~/^autogetsections:/) {      } elsif ($userinput =~/^autogetsections/) {
  if (isClient) {   if (isClient) {
     my ($cmd,$coursecode,$cdom)=split(/:/,$userinput);      my ($cmd,$coursecode,$cdom)=split(/:/,$userinput);
     my @secs = &localenroll::get_sections($coursecode,$cdom);      my @secs = &localenroll::get_sections($coursecode,$cdom);
Line 2830  sub process_request { Line 3416  sub process_request {
     print $client "refused\n";      print $client "refused\n";
  }   }
 #----------------------- validate owner of new course section (for auto-enrollment).  #----------------------- validate owner of new course section (for auto-enrollment).
     } elsif ($userinput =~/^autonewcourse:/) {      } elsif ($userinput =~/^autonewcourse/) {
  if (isClient) {   if (isClient) {
     my ($cmd,$inst_course_id,$owner,$cdom)=split(/:/,$userinput);      my ($cmd,$inst_course_id,$owner,$cdom)=split(/:/,$userinput);
     my $outcome = &localenroll::new_course($inst_course_id,$owner,$cdom);      my $outcome = &localenroll::new_course($inst_course_id,$owner,$cdom);
Line 2839  sub process_request { Line 3425  sub process_request {
     print $client "refused\n";      print $client "refused\n";
  }   }
 #-------------- validate course section in schedule of classes (for auto-enrollment).  #-------------- validate course section in schedule of classes (for auto-enrollment).
     } elsif ($userinput =~/^autovalidatecourse:/) {      } elsif ($userinput =~/^autovalidatecourse/) {
  if (isClient) {   if (isClient) {
     my ($cmd,$inst_course_id,$cdom)=split(/:/,$userinput);      my ($cmd,$inst_course_id,$cdom)=split(/:/,$userinput);
     my $outcome=&localenroll::validate_courseID($inst_course_id,$cdom);      my $outcome=&localenroll::validate_courseID($inst_course_id,$cdom);
Line 2848  sub process_request { Line 3434  sub process_request {
     print $client "refused\n";      print $client "refused\n";
  }   }
 #--------------------------- create password for new user (for auto-enrollment).  #--------------------------- create password for new user (for auto-enrollment).
     } elsif ($userinput =~/^autocreatepassword:/) {      } elsif ($userinput =~/^autocreatepassword/) {
  if (isClient) {   if (isClient) {
     my ($cmd,$authparam,$cdom)=split(/:/,$userinput);      my ($cmd,$authparam,$cdom)=split(/:/,$userinput);
     my ($create_passwd,$authchk);      my ($create_passwd,$authchk);
Line 2858  sub process_request { Line 3444  sub process_request {
     print $client "refused\n";      print $client "refused\n";
  }   }
 #---------------------------  read and remove temporary files (for auto-enrollment).  #---------------------------  read and remove temporary files (for auto-enrollment).
     } elsif ($userinput =~/^autoretrieve:/) {      } elsif ($userinput =~/^autoretrieve/) {
  if (isClient) {   if (isClient) {
     my ($cmd,$filename) = split(/:/,$userinput);      my ($cmd,$filename) = split(/:/,$userinput);
     my $source = $perlvar{'lonDaemons'}.'/tmp/'.$filename;      my $source = $perlvar{'lonDaemons'}.'/tmp/'.$filename;
Line 2884  sub process_request { Line 3470  sub process_request {
     print $client "refused\n";      print $client "refused\n";
  }   }
 #---------------------  read and retrieve institutional code format (for support form).  #---------------------  read and retrieve institutional code format (for support form).
     } elsif ($userinput =~/^autoinstcodeformat:/) {      } elsif ($userinput =~/^autoinstcodeformat/) {
  if (isClient) {   if (isClient) {
     my $reply;      my $reply;
     my($cmd,$cdom,$course) = split(/:/,$userinput);      my($cmd,$cdom,$course) = split(/:/,$userinput);
Line 2996  sub register_handler { Line 3582  sub register_handler {
         
     $Dispatcher{$request_name} = \@entry;      $Dispatcher{$request_name} = \@entry;
         
      
 }  }
   
   
Line 3043  sub catchexception { Line 3628  sub catchexception {
     $server->close();      $server->close();
     die($error);      die($error);
 }  }
   
 sub timeout {  sub timeout {
     &status("Handling Timeout");      &status("Handling Timeout");
     &logthis("<font color='red'>CRITICAL: TIME OUT ".$$."</font>");      &logthis("<font color='red'>CRITICAL: TIME OUT ".$$."</font>");
Line 3051  sub timeout { Line 3635  sub timeout {
 }  }
 # -------------------------------- Set signal handlers to record abnormal exits  # -------------------------------- Set signal handlers to record abnormal exits
   
   
 $SIG{'QUIT'}=\&catchexception;  $SIG{'QUIT'}=\&catchexception;
 $SIG{__DIE__}=\&catchexception;  $SIG{__DIE__}=\&catchexception;
   
Line 3251  sub checkchildren { Line 3836  sub checkchildren {
     &logthis('Going to check on the children');      &logthis('Going to check on the children');
     my $docdir=$perlvar{'lonDocRoot'};      my $docdir=$perlvar{'lonDocRoot'};
     foreach (sort keys %children) {      foreach (sort keys %children) {
  sleep 1;   #sleep 1;
         unless (kill 'USR1' => $_) {          unless (kill 'USR1' => $_) {
     &logthis ('Child '.$_.' is dead');      &logthis ('Child '.$_.' is dead');
             &logstatus($$.' is dead');              &logstatus($$.' is dead');
       delete($children{$_});
         }           } 
     }      }
     sleep 5;      sleep 5;
Line 3273  sub checkchildren { Line 3859  sub checkchildren {
     #my $result=`echo 'Killed lond process $_.' | mailto $emailto -s '$subj' > /dev/null`;      #my $result=`echo 'Killed lond process $_.' | mailto $emailto -s '$subj' > /dev/null`;
     #$execdir=$perlvar{'lonDaemons'};      #$execdir=$perlvar{'lonDaemons'};
     #$result=`/bin/cp $execdir/logs/lond.log $execdir/logs/lond.log.$_`;      #$result=`/bin/cp $execdir/logs/lond.log $execdir/logs/lond.log.$_`;
       delete($children{$_});
     alarm(0);      alarm(0);
   }    }
         }          }
Line 3280  sub checkchildren { Line 3867  sub checkchildren {
     $SIG{ALRM} = 'DEFAULT';      $SIG{ALRM} = 'DEFAULT';
     $SIG{__DIE__} = \&catchexception;      $SIG{__DIE__} = \&catchexception;
     &status("Finished checking children");      &status("Finished checking children");
       &logthis('Finished Checking children');
 }  }
   
 # --------------------------------------------------------------------- Logging  # --------------------------------------------------------------------- Logging
Line 3350  sub logstatus { Line 3938  sub logstatus {
     &status("Doing logging");      &status("Doing logging");
     my $docdir=$perlvar{'lonDocRoot'};      my $docdir=$perlvar{'lonDocRoot'};
     {      {
     my $fh=IO::File->new(">>$docdir/lon-status/londstatus.txt");  
     print $fh $$."\t".$clientname."\t".$currenthostid."\t"  
  .$status."\t".$lastlog."\t $keymode\n";  
     $fh->close();  
     }  
     &status("Finished londstatus.txt");  
     {  
  my $fh=IO::File->new(">$docdir/lon-status/londchld/$$.txt");   my $fh=IO::File->new(">$docdir/lon-status/londchld/$$.txt");
         print $fh $status."\n".$lastlog."\n".time."\n$keymode";          print $fh $status."\n".$lastlog."\n".time."\n$keymode";
         $fh->close();          $fh->close();
     }      }
       &status("Finished $$.txt");
       {
    open(LOG,">>$docdir/lon-status/londstatus.txt");
    flock(LOG,LOCK_EX);
    print LOG $$."\t".$clientname."\t".$currenthostid."\t"
       .$status."\t".$lastlog."\t $keymode\n";
    flock(DB,LOCK_UN);
    close(LOG);
       }
     &status("Finished logging");      &status("Finished logging");
 }  }
   
Line 3462  sub reply { Line 4052  sub reply {
   
 # -------------------------------------------------------------- Talk to lonsql  # -------------------------------------------------------------- Talk to lonsql
   
 sub sqlreply {  sub sql_reply {
     my ($cmd)=@_;      my ($cmd)=@_;
     my $answer=subsqlreply($cmd);      my $answer=&sub_sql_reply($cmd);
     if ($answer eq 'con_lost') { $answer=subsqlreply($cmd); }      if ($answer eq 'con_lost') { $answer=&sub_sql_reply($cmd); }
     return $answer;      return $answer;
 }  }
   
 sub subsqlreply {  sub sub_sql_reply {
     my ($cmd)=@_;      my ($cmd)=@_;
     my $unixsock="mysqlsock";      my $unixsock="mysqlsock";
     my $peerfile="$perlvar{'lonSockDir'}/$unixsock";      my $peerfile="$perlvar{'lonSockDir'}/$unixsock";
Line 3675  sub make_new_child { Line 4265  sub make_new_child {
  $inittype = ""; # This forces insecure attempt.   $inittype = ""; # This forces insecure attempt.
  &logthis("<font color=\"blue\"> Certificates not "   &logthis("<font color=\"blue\"> Certificates not "
  ."installed -- trying insecure auth</font>");   ."installed -- trying insecure auth</font>");
     }      } else { # SSL certificates are in place so
     else { # SSL certificates are in place so  
     } # Leave the inittype alone.      } # Leave the inittype alone.
  }   }
   
Line 3799  sub make_new_child { Line 4388  sub make_new_child {
 #    user      - Name of the user for which the role is being put.  #    user      - Name of the user for which the role is being put.
 #    authtype  - The authentication type associated with the user.  #    authtype  - The authentication type associated with the user.
 #  #
 sub ManagePermissions  sub manage_permissions
 {  {
   
     my ($request, $domain, $user, $authtype) = @_;      my ($request, $domain, $user, $authtype) = @_;
Line 3812  sub ManagePermissions Line 4401  sub ManagePermissions
  system("$execdir/lchtmldir $userhome $user $authtype");   system("$execdir/lchtmldir $userhome $user $authtype");
     }      }
 }  }
   
   
   #
   #  Return the full path of a user password file, whether it exists or not.
   # Parameters:
   #   domain     - Domain in which the password file lives.
   #   user       - name of the user.
   # Returns:
   #    Full passwd path:
 #  #
 #   GetAuthType - Determines the authorization type of a user in a domain.  sub password_path {
       my ($domain, $user) = @_;
   
   
       my $path   = &propath($domain, $user);
       $path  .= "/passwd";
   
       return $path;
   }
   
   #   Password Filename
   #   Returns the path to a passwd file given domain and user... only if
   #  it exists.
   # Parameters:
   #   domain    - Domain in which to search.
   #   user      - username.
   # Returns:
   #   - If the password file exists returns its path.
   #   - If the password file does not exist, returns undefined.
   #
   sub password_filename {
       my ($domain, $user) = @_;
   
       Debug ("PasswordFilename called: dom = $domain user = $user");
   
       my $path  = &password_path($domain, $user);
       Debug("PasswordFilename got path: $path");
       if(-e $path) {
    return $path;
       } else {
    return undef;
       }
   }
   
   #
   #   Rewrite the contents of the user's passwd file.
   #  Parameters:
   #    domain    - domain of the user.
   #    name      - User's name.
   #    contents  - New contents of the file.
   # Returns:
   #   0    - Failed.
   #   1    - Success.
   #
   sub rewrite_password_file {
       my ($domain, $user, $contents) = @_;
   
       my $file = &password_filename($domain, $user);
       if (defined $file) {
    my $pf = IO::File->new(">$file");
    if($pf) {
       print $pf "$contents\n";
       return 1;
    } else {
       return 0;
    }
       } else {
    return 0;
       }
   
   }
   
   #
   #   get_auth_type - Determines the authorization type of a user in a domain.
   
 #     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 GetAuthType   sub get_auth_type 
 {  {
   
     my ($domain, $user)  = @_;      my ($domain, $user)  = @_;
   
     Debug("GetAuthType( $domain, $user ) \n");      Debug("get_auth_type( $domain, $user ) \n");
     my $proname    = &propath($domain, $user);       my $proname    = &propath($domain, $user); 
     my $passwdfile = "$proname/passwd";      my $passwdfile = "$proname/passwd";
     if( -e $passwdfile ) {      if( -e $passwdfile ) {
Line 3838  sub GetAuthType Line 4499  sub GetAuthType
  }   }
   
  return "$authtype:$availinfo";   return "$authtype:$availinfo";
     }      } else {
     else {  
  Debug("Returning nouser");   Debug("Returning nouser");
  return "nouser";   return "nouser";
     }      }
Line 3879  sub validate_user { Line 4539  sub validate_user {
     #  the user has been assigned.  If the authentication type is      #  the user has been assigned.  If the authentication type is
     #  "nouser", the user does not exist so we will return 0.      #  "nouser", the user does not exist so we will return 0.
   
     my $contents = &GetAuthType($domain, $user);      my $contents = &get_auth_type($domain, $user);
     my ($howpwd, $contentpwd) = split(/:/, $contents);      my ($howpwd, $contentpwd) = split(/:/, $contents);
   
     my $null = pack("C",0); # Used by kerberos auth types.      my $null = pack("C",0); # Used by kerberos auth types.
Line 3919  sub validate_user { Line 4579  sub validate_user {
    $password);     $password);
  if(!$k4error) {   if(!$k4error) {
     $validated = 1;      $validated = 1;
  }   } else {
  else {  
     $validated = 0;      $validated = 0;
     &logthis('krb4: '.$user.', '.$contentpwd.', '.      &logthis('krb4: '.$user.', '.$contentpwd.', '.
      &Authen::Krb4::get_err_txt($Authen::Krb4::error));       &Authen::Krb4::get_err_txt($Authen::Krb4::error));
  }   }
     }      } else {
     else {  
  $validated = 0; # Password has a match with null.   $validated = 0; # Password has a match with null.
     }      }
  }   } elsif ($howpwd eq "krb5") { # User is in kerberos 5 auth. domain.
  elsif ($howpwd eq "krb5") { # User is in kerberos 5 auth. domain.  
     if(!($password =~ /$null/)) { # Null password not allowed.      if(!($password =~ /$null/)) { # Null password not allowed.
  my $krbclient = &Authen::Krb5::parse_name($user.'@'   my $krbclient = &Authen::Krb5::parse_name($user.'@'
   .$contentpwd);    .$contentpwd);
Line 3943  sub validate_user { Line 4600  sub validate_user {
  $password,   $password,
  $credentials);   $credentials);
  $validated = ($krbreturn == 1);   $validated = ($krbreturn == 1);
     }      } else {
     else {  
  $validated = 0;   $validated = 0;
     }      }
  }   } elsif ($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, 
        $password,          $password, 
        $contentpwd);         $contentpwd);
  }   } else { # Unrecognized auth is also bad.
  else { # Unrecognized auth is also bad.  
     $validated = 0;      $validated = 0;
  }   }
     } else {      } else {
Line 3991  sub addline { Line 4645  sub addline {
     return $found;      return $found;
 }  }
   
 sub getchat {  sub get_chat {
     my ($cdom,$cname,$udom,$uname)=@_;      my ($cdom,$cname,$udom,$uname)=@_;
     my %hash;      my %hash;
     my $proname=&propath($cdom,$cname);      my $proname=&propath($cdom,$cname);
Line 4016  sub getchat { Line 4670  sub getchat {
     return (@participants,@entries);      return (@participants,@entries);
 }  }
   
 sub chatadd {  sub chat_add {
     my ($cdom,$cname,$newchat)=@_;      my ($cdom,$cname,$newchat)=@_;
     my %hash;      my %hash;
     my $proname=&propath($cdom,$cname);      my $proname=&propath($cdom,$cname);
Line 4216  sub make_passwd_file { Line 4870  sub make_passwd_file {
  return "no_priv_account_error\n";   return "no_priv_account_error\n";
     }      }
   
     my $execpath="$perlvar{'lonDaemons'}/"."lcuseradd";      my $execpath       ="$perlvar{'lonDaemons'}/"."lcuseradd";
   
       my $lc_error_file  = $execdir."/tmp/lcuseradd".$$.".status";
     {      {
  &Debug("Executing external: ".$execpath);   &Debug("Executing external: ".$execpath);
  &Debug("user  = ".$uname.", Password =". $npass);   &Debug("user  = ".$uname.", Password =". $npass);
Line 4224  sub make_passwd_file { Line 4880  sub make_passwd_file {
  print $se "$uname\n";   print $se "$uname\n";
  print $se "$npass\n";   print $se "$npass\n";
  print $se "$npass\n";   print $se "$npass\n";
    print $se "$lc_error_file\n"; # Status -> unique file.
     }      }
     my $useraddok = $?;      my $error = IO::File->new("< $lc_error_file");
       my $useraddok = <$error>;
       $error->close;
       unlink($lc_error_file);
   
       chomp $useraddok;
   
     if($useraddok > 0) {      if($useraddok > 0) {
  &logthis("Failed lcuseradd: ".&lcuseraddstrerror($useraddok));   my $error_text = &lcuseraddstrerror($useraddok);
    &logthis("Failed lcuseradd: $error_text");
    $result = "lcuseradd_failed:$error_text\n";
       }  else {
    my $pf = IO::File->new(">$passfilename");
    print $pf "unix:\n";
     }      }
     my $pf = IO::File->new(">$passfilename");  
     print $pf "unix:\n";  
  }   }
     } elsif ($umode eq 'none') {      } elsif ($umode eq 'none') {
  {   {
     my $pf = IO::File->new(">$passfilename");      my $pf = IO::File->new("> $passfilename");
     print $pf "none:\n";      print $pf "none:\n";
  }   }
     } else {      } else {
Line 4563  Place in B<logs/lond.log> Line 5229  Place in B<logs/lond.log>
   
 stores hash in namespace  stores hash in namespace
   
 =item rolesput  =item rolesputy
   
 put a role into a user's environment  put a role into a user's environment
   

Removed from v.1.220  
changed lines
  Added in v.1.237


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