loncom/lond - diff

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Diff for /loncom/lond between versions 1.261 and 1.317

version 1.261, 2004/10/18 10:13:46	version 1.317, 2006/02/07 05:08:27
Line 46 use Authen::Krb5;	Line 46 use Authen::Krb5;
use lib '/home/httpd/lib/perl/';	use lib '/home/httpd/lib/perl/';
use localauth;	use localauth;
use localenroll;	use localenroll;
	use localstudentphoto;
use File::Copy;	use File::Copy;
	use File::Find;
use LONCAPA::ConfigFileEdit;	use LONCAPA::ConfigFileEdit;
use LONCAPA::lonlocal;	use LONCAPA::lonlocal;
use LONCAPA::lonssl;	use LONCAPA::lonssl;
use Fcntl qw(:flock);	use Fcntl qw(:flock);
	use Symbol;

my $DEBUG = 0; # Non zero to enable debug log entries.	my $DEBUG = 0; # Non zero to enable debug log entries.

my $status='';	my $status='';
my $lastlog='';	my $lastlog='';
	my $lond_max_wait_time = 13;

my $VERSION='$Revision$'; #' stupid emacs	my $VERSION='$Revision$'; #' stupid emacs
my $remoteVERSION;	my $remoteVERSION;
Line 64 my $currentdomainid;	Line 68 my $currentdomainid;

my $client;	my $client;
my $clientip; # IP address of client.	my $clientip; # IP address of client.
my $clientdns; # DNS name of client.
my $clientname; # LonCAPA name of client.	my $clientname; # LonCAPA name of client.

my $server;	my $server;
Line 86 my $ConnectionType;	Line 89 my $ConnectionType;

my %hostid; # ID's for hosts in cluster by ip.	my %hostid; # ID's for hosts in cluster by ip.
my %hostdom; # LonCAPA domain for hosts in cluster.	my %hostdom; # LonCAPA domain for hosts in cluster.
	my %hostname; # DNSname -> ID's mapping.
my %hostip; # IPs for hosts in cluster.	my %hostip; # IPs for hosts in cluster.
my %hostdns; # ID's of hosts looked up by DNS name.	my %hostdns; # ID's of hosts looked up by DNS name.

Line 112 my %Dispatcher;	Line 116 my %Dispatcher;
#	#
my $lastpwderror = 13; # Largest error number from lcpasswd.	my $lastpwderror = 13; # Largest error number from lcpasswd.
my @passwderrors = ("ok",	my @passwderrors = ("ok",
"lcpasswd must be run as user 'www'",	"pwchange_failure - lcpasswd must be run as user 'www'",
"lcpasswd got incorrect number of arguments",	"pwchange_failure - lcpasswd got incorrect number of arguments",
"lcpasswd did not get the right nubmer of input text lines",	"pwchange_failure - lcpasswd did not get the right nubmer of input text lines",
"lcpasswd too many simultaneous pwd changes in progress",	"pwchange_failure - lcpasswd too many simultaneous pwd changes in progress",
"lcpasswd User does not exist.",	"pwchange_failure - lcpasswd User does not exist.",
"lcpasswd Incorrect current passwd",	"pwchange_failure - lcpasswd Incorrect current passwd",
"lcpasswd Unable to su to root.",	"pwchange_failure - lcpasswd Unable to su to root.",
"lcpasswd Cannot set new passwd.",	"pwchange_failure - lcpasswd Cannot set new passwd.",
"lcpasswd Username has invalid characters",	"pwchange_failure - lcpasswd Username has invalid characters",
"lcpasswd Invalid characters in password",	"pwchange_failure - lcpasswd Invalid characters in password",
"lcpasswd User already exists",	"pwchange_failure - lcpasswd User already exists",
"lcpasswd Something went wrong with user addition.",	"pwchange_failure - lcpasswd Something went wrong with user addition.",
"lcpasswd Password mismatch",	"pwchange_failure - lcpasswd Password mismatch",
"lcpasswd Error filename is invalid");	"pwchange_failure - lcpasswd Error filename is invalid");


# The array below are lcuseradd error strings.:	# The array below are lcuseradd error strings.:
Line 177 sub ResetStatistics {	Line 181 sub ResetStatistics {
# $initcmd - The full text of the init command.	# $initcmd - The full text of the init command.
#	#
# Implicit inputs:	# Implicit inputs:
# $clientdns - The DNS name of the remote client.
# $thisserver - Our DNS name.	# $thisserver - Our DNS name.
#	#
# Returns:	# Returns:
Line 186 sub ResetStatistics {	Line 189 sub ResetStatistics {
#	#
sub LocalConnection {	sub LocalConnection {
my ($Socket, $initcmd) = @_;	my ($Socket, $initcmd) = @_;
Debug("Attempting local connection: $initcmd client: $clientdns me: $thisserver");	Debug("Attempting local connection: $initcmd client: $clientip me: $thisserver");
if($clientdns ne $thisserver) {	if($clientip ne "127.0.0.1") {
&logthis('<font color="red"> LocalConnection rejecting non local: '	&logthis('<font color="red"> LocalConnection rejecting non local: '
."$clientdns ne $thisserver </font>");	."$clientip ne $thisserver </font>");
close $Socket;	close $Socket;
return undef;	return undef;
} else {	} else {
Line 473 sub CopyFile {	Line 476 sub CopyFile {

my ($oldfile, $newfile) = @_;	my ($oldfile, $newfile) = @_;

# The file must exist:	if (! copy($oldfile,$newfile)) {
	return 0;
if(-e $oldfile) {

# Read the old file.

my $oldfh = IO::File->new("< $oldfile");
if(!$oldfh) {
return 0;
}
my @contents = <$oldfh>; # Suck in the entire file.

# write the backup file:

my $newfh = IO::File->new("> $newfile");
if(!(defined $newfh)){
return 0;
}
my $lines = scalar @contents;
for (my $i =0; $i < $lines; $i++) {
print $newfh ($contents[$i]);
}

$oldfh->close;
$newfh->close;

chmod(0660, $newfile);

return 1;

} else {
return 0;
}	}
	chmod(0660, $newfile);
	return 1;
}	}
#	#
# Host files are passed out with externally visible host IPs.	# Host files are passed out with externally visible host IPs.
Line 998 sub tie_domain_hash {	Line 973 sub tie_domain_hash {

my $user_top_dir = $perlvar{'lonUsersDir'};	my $user_top_dir = $perlvar{'lonUsersDir'};
my $domain_dir = $user_top_dir."/$domain";	my $domain_dir = $user_top_dir."/$domain";
my $resource_file = $domain_dir."/$namespace.db";	my $resource_file = $domain_dir."/$namespace";
my %hash;	return &_locking_hash_tie($resource_file,$namespace,$how,$loghead,$logtail);
if(tie(%hash, 'GDBM_File', $resource_file, $how, 0640)) {
if (defined($loghead)) { # Need to log the operation.
my $logFh = IO::File->new(">>$domain_dir/$namespace.hist");
if($logFh) {
my $timestamp = time;
print $logFh "$loghead:$timestamp:$logtail\n";
}
$logFh->close;
}
return \%hash; # Return the tied hash.
} else {
return undef; # Tie failed.
}
}	}

	sub untie_domain_hash {
	return &_locking_hash_untie(@_);
	}
#	#
# Ties a user's resource file to a hash.	# Ties a user's resource file to a hash.
# If necessary, an appropriate history	# If necessary, an appropriate history
Line 1040 sub tie_user_hash {	Line 1005 sub tie_user_hash {
$namespace=~s/\//\_/g; # / -> _	$namespace=~s/\//\_/g; # / -> _
$namespace=~s/\W//g; # whitespace eliminated.	$namespace=~s/\W//g; # whitespace eliminated.
my $proname = propath($domain, $user);	my $proname = propath($domain, $user);

# Tie the database.	my $file_prefix="$proname/$namespace";
	return &_locking_hash_tie($file_prefix,$namespace,$how,$loghead,$what);
	}

	sub untie_user_hash {
	return &_locking_hash_untie(@_);
	}

	# internal routines that handle the actual tieing and untieing process

	sub _do_hash_tie {
	my ($file_prefix,$namespace,$how,$loghead,$what) = @_;
my %hash;	my %hash;
if(tie(%hash, 'GDBM_File', "$proname/$namespace.db",	if(tie(%hash, 'GDBM_File', "$file_prefix.db", $how, 0640)) {
$how, 0640)) {
# If this is a namespace for which a history is kept,	# If this is a namespace for which a history is kept,
# make the history log entry:	# make the history log entry:
if (($namespace !~/^nohist\_/) && (defined($loghead))) {	if (($namespace !~/^nohist\_/) && (defined($loghead))) {
my $args = scalar @_;	my $args = scalar @_;
Debug(" Opening history: $namespace $args");	Debug(" Opening history: $file_prefix $args");
my $hfh = IO::File->new(">>$proname/$namespace.hist");	my $hfh = IO::File->new(">>$file_prefix.hist");
if($hfh) {	if($hfh) {
my $now = time;	my $now = time;
print $hfh "$loghead:$now:$what\n";	print $hfh "$loghead:$now:$what\n";
Line 1062 sub tie_user_hash {	Line 1036 sub tie_user_hash {
} else {	} else {
return undef;	return undef;
}	}
	}

	sub _do_hash_untie {
	my ($hashref) = @_;
	my $result = untie(%$hashref);
	return $result;
	}

	{
	my $sym;

	sub _locking_hash_tie {
	my ($file_prefix,$namespace,$how,$loghead,$what) = @_;

	my ($lock);

	if ($how eq &GDBM_READER()) {
	$lock=LOCK_SH;
	$how=$how\|&GDBM_NOLOCK();
	#if the db doesn't exist we can't read from it
	if (! -e "$file_prefix.db") {
	$! = 2;
	return undef;
	}
	} elsif ($how eq &GDBM_WRCREAT()) {
	$lock=LOCK_EX;
	$how=$how\|&GDBM_NOLOCK();
	if (! -e "$file_prefix.db") {
	# doesn't exist but we need it to in order to successfully
	# lock it so bring it into existance
	open(TOUCH,">>$file_prefix.db");
	close(TOUCH);
	}
	} else {
	&logthis("Unknown method $how for $file_prefix");
	die();
	}

	$sym=&Symbol::gensym();
	open($sym,"$file_prefix.db");
	my $failed=0;
	eval {
	local $SIG{__DIE__}='DEFAULT';
	local $SIG{ALRM}=sub {
	$failed=1;
	die("failed lock");
	};
	alarm($lond_max_wait_time);
	flock($sym,$lock);
	alarm(0);
	};
	if ($failed) {
	$! = 100; # throwing error # 100
	return undef;
	}
	return &_do_hash_tie($file_prefix,$namespace,$how,$loghead,$what);
	}

	sub _locking_hash_untie {
	my ($hashref) = @_;
	my $result = untie(%$hashref);
	flock($sym,LOCK_UN);
	close($sym);
	undef($sym);
	return $result;
	}
}	}

# read_profile	# read_profile
Line 1095 sub read_profile {	Line 1134 sub read_profile {
$qresult.="$hashref->{$queries[$i]}&"; # Presumably failure gives empty string.	$qresult.="$hashref->{$queries[$i]}&"; # Presumably failure gives empty string.
}	}
$qresult=~s/\&$//; # Remove trailing & from last lookup.	$qresult=~s/\&$//; # Remove trailing & from last lookup.
if (untie %$hashref) {	if (&untie_user_hash($hashref)) {
return $qresult;	return $qresult;
} else {	} else {
return "error: ".($!+0)." untie (GDBM) Failed";	return "error: ".($!+0)." untie (GDBM) Failed";
Line 1130 sub read_profile {	Line 1169 sub read_profile {
# 0 - Program should exit.	# 0 - Program should exit.
# Side effects:	# Side effects:
# Reply information is sent to the client.	# Reply information is sent to the client.

sub ping_handler {	sub ping_handler {
my ($cmd, $tail, $client) = @_;	my ($cmd, $tail, $client) = @_;
Debug("$cmd $tail $client .. $currenthostid:");	Debug("$cmd $tail $client .. $currenthostid:");
Line 1158 sub ping_handler {	Line 1196 sub ping_handler {
# 0 - Program should exit.	# 0 - Program should exit.
# Side effects:	# Side effects:
# Reply information is sent to the client.	# Reply information is sent to the client.

sub pong_handler {	sub pong_handler {
my ($cmd, $tail, $replyfd) = @_;	my ($cmd, $tail, $replyfd) = @_;

Line 1213 sub establish_key_handler {	Line 1250 sub establish_key_handler {
}	}
&register_handler("ekey", \&establish_key_handler, 0, 1,1);	&register_handler("ekey", \&establish_key_handler, 0, 1,1);


# Handler for the load command. Returns the current system load average	# Handler for the load command. Returns the current system load average
# to the requestor.	# to the requestor.
#	#
Line 1248 sub load_handler {	Line 1284 sub load_handler {

return 1;	return 1;
}	}
register_handler("load", \&load_handler, 0, 1, 0);	&register_handler("load", \&load_handler, 0, 1, 0);

#	#
# Process the userload request. This sub returns to the client the current	# Process the userload request. This sub returns to the client the current
Line 1278 sub user_load_handler {	Line 1314 sub user_load_handler {

return 1;	return 1;
}	}
register_handler("userload", \&user_load_handler, 0, 1, 0);	&register_handler("userload", \&user_load_handler, 0, 1, 0);

# Process a request for the authorization type of a user:	# Process a request for the authorization type of a user:
# (userauth).	# (userauth).
Line 1314 sub user_authorization_type {	Line 1350 sub user_authorization_type {
my ($type,$otherinfo) = split(/:/,$result);	my ($type,$otherinfo) = split(/:/,$result);
if($type =~ /^krb/) {	if($type =~ /^krb/) {
$type = $result;	$type = $result;
}	} else {
&Reply( $replyfd, "$type:\n", $userinput);	$type .= ':';
	}
	&Reply( $replyfd, "$type\n", $userinput);
}	}

return 1;	return 1;
Line 1335 sub user_authorization_type {	Line 1373 sub user_authorization_type {
# 0 - Program should exit	# 0 - Program should exit
# Implicit Output:	# Implicit Output:
# a reply is written to the client.	# a reply is written to the client.

sub push_file_handler {	sub push_file_handler {
my ($cmd, $tail, $client) = @_;	my ($cmd, $tail, $client) = @_;

Line 1378 sub push_file_handler {	Line 1415 sub push_file_handler {
# Side Effects:	# Side Effects:
# The reply is written to $client.	# The reply is written to $client.
#	#

sub du_handler {	sub du_handler {
my ($cmd, $ududir, $client) = @_;	my ($cmd, $ududir, $client) = @_;
my ($ududir) = split(/:/,$ududir); # Make 'telnet' testing easier.	my ($ududir) = split(/:/,$ududir); # Make 'telnet' testing easier.
Line 1395 sub du_handler {	Line 1431 sub du_handler {
# etc.	# etc.
#	#
if (-d $ududir) {	if (-d $ududir) {
# And as Shakespeare would say to make	my $total_size=0;
# assurance double sure,	my $code=sub {
# use execute_command to ensure that the command is not executed in	if ($_=~/\.\d+\./) { return;}
# a shell that can screw us up.	if ($_=~/\.meta$/) { return;}
	$total_size+=(stat($_))[7];
my $duout = execute_command("du -ks $ududir");	};
$duout=~s/[^\d]//g; #preserve only the numbers	chdir($ududir);
&Reply($client,"$duout\n","$cmd:$ududir");	find($code,$ududir);
	$total_size=int($total_size/1024);
	&Reply($client,"$total_size\n","$cmd:$ududir");
} else {	} else {

&Failure($client, "bad_directory:$ududir\n","$cmd:$ududir");	&Failure($client, "bad_directory:$ududir\n","$cmd:$ududir");

}	}
return 1;	return 1;
}	}
&register_handler("du", \&du_handler, 0, 1, 0);	&register_handler("du", \&du_handler, 0, 1, 0);

	#
	# The ls_handler routine should be considered obosolete and is retained
	# for communication with legacy servers. Please see the ls2_handler.
#	#
# ls - list the contents of a directory. For each file in the	# ls - list the contents of a directory. For each file in the
# selected directory the filename followed by the full output of	# selected directory the filename followed by the full output of
Line 1430 sub du_handler {	Line 1468 sub du_handler {
# The reply is written to $client.	# The reply is written to $client.
#	#
sub ls_handler {	sub ls_handler {
	# obsoleted by ls2_handler
my ($cmd, $ulsdir, $client) = @_;	my ($cmd, $ulsdir, $client) = @_;

my $userinput = "$cmd:$ulsdir";	my $userinput = "$cmd:$ulsdir";
Line 1442 sub ls_handler {	Line 1481 sub ls_handler {
if(-d $ulsdir) {	if(-d $ulsdir) {
if (opendir(LSDIR,$ulsdir)) {	if (opendir(LSDIR,$ulsdir)) {
while ($ulsfn=readdir(LSDIR)) {	while ($ulsfn=readdir(LSDIR)) {
undef $obs, $rights;	undef($obs);
	undef($rights);
my @ulsstats=stat($ulsdir.'/'.$ulsfn);	my @ulsstats=stat($ulsdir.'/'.$ulsfn);
#We do some obsolete checking here	#We do some obsolete checking here
if(-e $ulsdir.'/'.$ulsfn.".meta") {	if(-e $ulsdir.'/'.$ulsfn.".meta") {
open(FILE, $ulsdir.'/'.$ulsfn.".meta");	open(FILE, $ulsdir.'/'.$ulsfn.".meta");
my @obsolete=<FILE>;	my @obsolete=<FILE>;
foreach my $obsolete (@obsolete) {	foreach my $obsolete (@obsolete) {
if($obsolete =~ m\|(<obsolete>)(on)\|) { $obs = 1; }	if($obsolete =~ m/(<obsolete>)(on\|1)/) { $obs = 1; }
if($obsolete =~ m\|(<copyright>)(default)\|) { $rights = 1; }	if($obsolete =~ m\|(<copyright>)(default)\|) { $rights = 1; }
}	}
}	}
Line 1476 sub ls_handler {	Line 1516 sub ls_handler {
}	}
&register_handler("ls", \&ls_handler, 0, 1, 0);	&register_handler("ls", \&ls_handler, 0, 1, 0);

	#
	# Please also see the ls_handler, which this routine obosolets.
	# ls2_handler differs from ls_handler in that it escapes its return
	# values before concatenating them together with ':'s.
	#
	# ls2 - list the contents of a directory. For each file in the
	# selected directory the filename followed by the full output of
	# the stat function is returned. The returned info for each
	# file are separated by ':'. The stat fields are separated by &'s.
	# Parameters:
	# $cmd - The command that dispatched us (ls).
	# $ulsdir - The directory path to list... I'm not sure what this
	# is relative as things like ls:. return e.g.
	# no_such_dir.
	# $client - Socket open on the client.
	# Returns:
	# 1 - indicating that the daemon should not disconnect.
	# Side Effects:
	# The reply is written to $client.
	#
	sub ls2_handler {
	my ($cmd, $ulsdir, $client) = @_;

	my $userinput = "$cmd:$ulsdir";

	my $obs;
	my $rights;
	my $ulsout='';
	my $ulsfn;
	if (-e $ulsdir) {
	if(-d $ulsdir) {
	if (opendir(LSDIR,$ulsdir)) {
	while ($ulsfn=readdir(LSDIR)) {
	undef($obs);
	undef($rights);
	my @ulsstats=stat($ulsdir.'/'.$ulsfn);
	#We do some obsolete checking here
	if(-e $ulsdir.'/'.$ulsfn.".meta") {
	open(FILE, $ulsdir.'/'.$ulsfn.".meta");
	my @obsolete=<FILE>;
	foreach my $obsolete (@obsolete) {
	if($obsolete =~ m/(<obsolete>)(on\|1)/) { $obs = 1; }
	if($obsolete =~ m\|(<copyright>)(default)\|) {
	$rights = 1;
	}
	}
	}
	my $tmp = $ulsfn.'&'.join('&',@ulsstats);
	if ($obs eq '1') { $tmp.="&1"; } else { $tmp.="&0"; }
	if ($rights eq '1') { $tmp.="&1"; } else { $tmp.="&0"; }
	$ulsout.= &escape($tmp).':';
	}
	closedir(LSDIR);
	}
	} else {
	my @ulsstats=stat($ulsdir);
	$ulsout.=$ulsfn.'&'.join('&',@ulsstats).':';
	}
	} else {
	$ulsout='no_such_dir';
	}
	if ($ulsout eq '') { $ulsout='empty'; }
	&Reply($client, "$ulsout\n", $userinput); # This supports debug logging.
	return 1;
	}
	&register_handler("ls2", \&ls2_handler, 0, 1, 0);

# Process a reinit request. Reinit requests that either	# Process a reinit request. Reinit requests that either
# lonc or lond be reinitialized so that an updated	# lonc or lond be reinitialized so that an updated
Line 1508 sub reinit_process_handler {	Line 1612 sub reinit_process_handler {
}	}
return 1;	return 1;
}	}

&register_handler("reinit", \&reinit_process_handler, 1, 0, 1);	&register_handler("reinit", \&reinit_process_handler, 1, 0, 1);

# Process the editing script for a table edit operation.	# Process the editing script for a table edit operation.
Line 1550 sub edit_table_handler {	Line 1653 sub edit_table_handler {
}	}
return 1;	return 1;
}	}
register_handler("edit", \&edit_table_handler, 1, 0, 1);	&register_handler("edit", \&edit_table_handler, 1, 0, 1);


#	#
# Authenticate a user against the LonCAPA authentication	# Authenticate a user against the LonCAPA authentication
Line 1606 sub authenticate_handler {	Line 1708 sub authenticate_handler {

return 1;	return 1;
}	}
	&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	# Change a user's password. Note that this function is complicated by
Line 1670 sub change_password_handler {	Line 1771 sub change_password_handler {
&Failure( $client, "non_authorized\n",$userinput);	&Failure( $client, "non_authorized\n",$userinput);
}	}
} elsif ($howpwd eq 'unix') {	} elsif ($howpwd eq 'unix') {
# Unix means we have to access /etc/password	my $result = &change_unix_password($uname, $npass);
&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: ".	&logthis("Result of password change for $uname: ".
&lcpasswdstrerror($?));	$result);
&Reply($client, "$result\n", $userinput);	&Reply($client, "$result\n", $userinput);
} else {	} else {
# this just means that the current password mode is not	# this just means that the current password mode is not
Line 1698 sub change_password_handler {	Line 1789 sub change_password_handler {

return 1;	return 1;
}	}
register_handler("passwd", \&change_password_handler, 1, 1, 0);	&register_handler("passwd", \&change_password_handler, 1, 1, 0);


#	#
# Create a new user. User in this case means a lon-capa user.	# Create a new user. User in this case means a lon-capa user.
Line 1738 sub add_user_handler {	Line 1828 sub add_user_handler {
if (-e $passfilename) {	if (-e $passfilename) {
&Failure( $client, "already_exists\n", $userinput);	&Failure( $client, "already_exists\n", $userinput);
} else {	} else {
my @fpparts=split(/\//,$passfilename);
my $fpnow=$fpparts[0].'/'.$fpparts[1].'/'.$fpparts[2];
my $fperror='';	my $fperror='';
for (my $i=3;$i<= ($#fpparts-1);$i++) {	if (!&mkpath($passfilename)) {
$fpnow.='/'.$fpparts[$i];	$fperror="error: ".($!+0)." mkdir failed while attempting "
unless (-e $fpnow) {	."makeuser";
&logthis("mkdir $fpnow");
unless (mkdir($fpnow,0777)) {
$fperror="error: ".($!+0)." mkdir failed while attempting "
."makeuser";
}
}
}	}
unless ($fperror) {	unless ($fperror) {
my $result=&make_passwd_file($uname, $umode,$npass, $passfilename);	my $result=&make_passwd_file($uname, $umode,$npass, $passfilename);
Line 1790 sub add_user_handler {	Line 1872 sub add_user_handler {
# Implicit inputs:	# Implicit inputs:
# The authentication systems describe above have their own forms of implicit	# The authentication systems describe above have their own forms of implicit
# input into the authentication process that are described above.	# input into the authentication process that are described above.
	# NOTE:
	# This is also used to change the authentication credential values (e.g. passwd).
	#
#	#
sub change_authentication_handler {	sub change_authentication_handler {

Line 1809 sub change_authentication_handler {	Line 1894 sub change_authentication_handler {
my $oldauth = &get_auth_type($udom, $uname); # Get old auth info.	my $oldauth = &get_auth_type($udom, $uname); # Get old auth info.
my $passfilename = &password_path($udom, $uname);	my $passfilename = &password_path($udom, $uname);
if ($passfilename) { # Not allowed to create a new user!!	if ($passfilename) { # Not allowed to create a new user!!
my $result=&make_passwd_file($uname, $umode,$npass,$passfilename);	# If just changing the unix passwd. need to arrange to run
#	# passwd since otherwise make_passwd_file will run
# If the current auth mode is internal, and the old auth mode was	# lcuseradd which fails if an account already exists
# unix, or krb*, and the user is an author for this domain,	# (to prevent an unscrupulous LONCAPA admin from stealing
# re-run manage_permissions for that role in order to be able	# an existing account by overwriting it as a LonCAPA account).
# to take ownership of the construction space back to www:www
#	if(($oldauth =~/^unix/) && ($umode eq "unix")) {
	my $result = &change_unix_password($uname, $npass);
if( ($oldauth =~ /^unix/) && ($umode eq "internal")) { # unix -> internal	&logthis("Result of password change for $uname: ".$result);
if(&is_author($udom, $uname)) {	if ($result eq "ok") {
&Debug(" Need to manage author permissions...");	&Reply($client, "$result\n")
&manage_permissions("/$udom/_au", $udom, $uname, "internal:");	} else {
	&Failure($client, "$result\n");
}	}
	} else {
	my $result=&make_passwd_file($uname, $umode,$npass,$passfilename);
	#
	# If the current auth mode is internal, and the old auth mode was
	# unix, or krb*, and the user is an author for this domain,
	# re-run manage_permissions for that role in order to be able
	# to take ownership of the construction space back to www:www
	#


	if( (($oldauth =~ /^unix/) && ($umode eq "internal")) \|\|
	(($oldauth =~ /^internal/) && ($umode eq "unix")) ) {
	if(&is_author($udom, $uname)) {
	&Debug(" Need to manage author permissions...");
	&manage_permissions("/$udom/_au", $udom, $uname, "$umode:");
	}
	}
	&Reply($client, $result, $userinput);
}	}


&Reply($client, $result, $userinput);
} else {	} else {
&Failure($client, "non_authorized\n", $userinput); # Fail the user now.	&Failure($client, "non_authorized\n", $userinput); # Fail the user now.
}	}
Line 1907 sub update_resource_handler {	Line 2010 sub update_resource_handler {
my $since=$now-$atime;	my $since=$now-$atime;
if ($since>$perlvar{'lonExpire'}) {	if ($since>$perlvar{'lonExpire'}) {
my $reply=&reply("unsub:$fname","$clientname");	my $reply=&reply("unsub:$fname","$clientname");
	&devalidate_meta_cache($fname);
unlink("$fname");	unlink("$fname");
} else {	} else {
my $transname="$fname.in.transfer";	my $transname="$fname.in.transfer";
Line 1937 sub update_resource_handler {	Line 2041 sub update_resource_handler {
alarm(0);	alarm(0);
}	}
rename($transname,$fname);	rename($transname,$fname);
	&devalidate_meta_cache($fname);
}	}
}	}
&Reply( $client, "ok\n", $userinput);	&Reply( $client, "ok\n", $userinput);
Line 1950 sub update_resource_handler {	Line 2055 sub update_resource_handler {
}	}
&register_handler("update", \&update_resource_handler, 0 ,1, 0);	&register_handler("update", \&update_resource_handler, 0 ,1, 0);

	sub devalidate_meta_cache {
	my ($url) = @_;
	use Cache::Memcached;
	my $memcache = new Cache::Memcached({'servers'=>['127.0.0.1:11211']});
	$url = &declutter($url);
	$url =~ s-\.meta$--;
	my $id = &escape('meta:'.$url);
	$memcache->delete($id);
	}

	sub declutter {
	my $thisfn=shift;
	$thisfn=~s/^\Q$perlvar{'lonDocRoot'}\E//;
	$thisfn=~s/^\///;
	$thisfn=~s\|^adm/wrapper/\|\|;
	$thisfn=~s\|^adm/coursedocs/showdoc/\|\|;
	$thisfn=~s/^res\///;
	$thisfn=~s/\?.+$//;
	return $thisfn;
	}
#	#
# Fetch a user file from a remote server to the user's home directory	# Fetch a user file from a remote server to the user's home directory
# userfiles subdir.	# userfiles subdir.
Line 1980 sub fetch_user_file_handler {	Line 2105 sub fetch_user_file_handler {
# Note that any regular files in the way of this path are	# Note that any regular files in the way of this path are
# wiped out to deal with some earlier folly of mine.	# wiped out to deal with some earlier folly of mine.

my $path = $udir;	if (!&mkpath($udir.'/'.$ufile)) {
if ($ufile =~m\|(.+)/([^/]+)$\|) {	&Failure($client, "unable_to_create\n", $userinput);
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 $destname=$udir.'/'.$ufile;
my $transname=$udir.'/'.$ufile.'.in.transit';	my $transname=$udir.'/'.$ufile.'.in.transit';
my $remoteurl='http://'.$clientip.'/userfiles/'.$fname;	my $remoteurl='http://'.$clientip.'/userfiles/'.$fname;
Line 2038 sub fetch_user_file_handler {	Line 2152 sub fetch_user_file_handler {
#	#
# Returns:	# Returns:
# 1 - Continue processing.	# 1 - Continue processing.

sub remove_user_file_handler {	sub remove_user_file_handler {
my ($cmd, $tail, $client) = @_;	my ($cmd, $tail, $client) = @_;

Line 2091 sub remove_user_file_handler {	Line 2204 sub remove_user_file_handler {
#	#
# Returns:	# Returns:
# 1 - Continue processing.	# 1 - Continue processing.

sub mkdir_user_file_handler {	sub mkdir_user_file_handler {
my ($cmd, $tail, $client) = @_;	my ($cmd, $tail, $client) = @_;

Line 2105 sub mkdir_user_file_handler {	Line 2217 sub mkdir_user_file_handler {
} else {	} else {
my $udir = &propath($udom,$uname);	my $udir = &propath($udom,$uname);
if (-e $udir) {	if (-e $udir) {
my $newdir=$udir.'/userfiles/'.$ufile;	my $newdir=$udir.'/userfiles/'.$ufile.'/';
if (!-e $newdir) {	if (!&mkpath($newdir)) {
my @parts=split('/',$newdir);	&Failure($client, "failed\n", "$cmd:$tail");
my $path;
foreach my $part (@parts) {
$path .= '/'.$part;
if (!-e $path) {
mkdir($path,0770);
}
}
if (!-e $newdir) {
&Failure($client, "failed\n", "$cmd:$tail");
} else {
&Reply($client, "ok\n", "$cmd:$tail");
}
} else {
&Failure($client, "not_found\n", "$cmd:$tail");
}	}
	&Reply($client, "ok\n", "$cmd:$tail");
} else {	} else {
&Failure($client, "not_home\n", "$cmd:$tail");	&Failure($client, "not_home\n", "$cmd:$tail");
}	}
Line 2140 sub mkdir_user_file_handler {	Line 2239 sub mkdir_user_file_handler {
#	#
# Returns:	# Returns:
# 1 - Continue processing.	# 1 - Continue processing.

sub rename_user_file_handler {	sub rename_user_file_handler {
my ($cmd, $tail, $client) = @_;	my ($cmd, $tail, $client) = @_;

Line 2174 sub rename_user_file_handler {	Line 2272 sub rename_user_file_handler {
}	}
&register_handler("renameuserfile", \&rename_user_file_handler, 0,1,0);	&register_handler("renameuserfile", \&rename_user_file_handler, 0,1,0);


#	#
# Authenticate access to a user file by checking the user's	# Authenticate access to a user file by checking that the token the user's
# session token(?)	# passed also exists in their session file
#	#
# Parameters:	# Parameters:
# cmd - The request keyword that dispatched to tus.	# cmd - The request keyword that dispatched to tus.
Line 2185 sub rename_user_file_handler {	Line 2282 sub rename_user_file_handler {
# client - Filehandle open on the client.	# client - Filehandle open on the client.
# Return:	# Return:
# 1.	# 1.

sub token_auth_user_file_handler {	sub token_auth_user_file_handler {
my ($cmd, $tail, $client) = @_;	my ($cmd, $tail, $client) = @_;

Line 2206 sub token_auth_user_file_handler {	Line 2302 sub token_auth_user_file_handler {
return 1;	return 1;

}	}

&register_handler("tokenauthuserfile", \&token_auth_user_file_handler, 0,1,0);	&register_handler("tokenauthuserfile", \&token_auth_user_file_handler, 0,1,0);


#	#
# Unsubscribe from a resource.	# Unsubscribe from a resource.
#	#
Line 2238 sub unsubscribe_handler {	Line 2332 sub unsubscribe_handler {
return 1;	return 1;
}	}
&register_handler("unsub", \&unsubscribe_handler, 0, 1, 0);	&register_handler("unsub", \&unsubscribe_handler, 0, 1, 0);

# Subscribe to a resource	# Subscribe to a resource
#	#
# Parameters:	# Parameters:
Line 2316 sub activity_log_handler {	Line 2411 sub activity_log_handler {

return 1;	return 1;
}	}
register_handler("log", \&activity_log_handler, 0, 1, 0);	&register_handler("log", \&activity_log_handler, 0, 1, 0);

#	#
# Put a namespace entry in a user profile hash.	# Put a namespace entry in a user profile hash.
Line 2348 sub put_user_profile_entry {	Line 2443 sub put_user_profile_entry {
my ($key,$value)=split(/=/,$pair);	my ($key,$value)=split(/=/,$pair);
$hashref->{$key}=$value;	$hashref->{$key}=$value;
}	}
if (untie(%$hashref)) {	if (&untie_user_hash($hashref)) {
&Reply( $client, "ok\n", $userinput);	&Reply( $client, "ok\n", $userinput);
} else {	} else {
&Failure($client, "error: ".($!+0)." untie(GDBM) failed ".	&Failure($client, "error: ".($!+0)." untie(GDBM) failed ".
Line 2356 sub put_user_profile_entry {	Line 2451 sub put_user_profile_entry {
$userinput);	$userinput);
}	}
} else {	} else {
&Failure( $client, "error: ".($!)." tie(GDBM) Failed ".	&Failure( $client, "error: ".($!+0)." tie(GDBM) Failed ".
"while attempting put\n", $userinput);	"while attempting put\n", $userinput);
}	}
} else {	} else {
Line 2367 sub put_user_profile_entry {	Line 2462 sub put_user_profile_entry {
}	}
&register_handler("put", \&put_user_profile_entry, 0, 1, 0);	&register_handler("put", \&put_user_profile_entry, 0, 1, 0);

	# Put a piece of new data in hash, returns error if entry already exists
	# Parameters:
	# $cmd - The command that got us here.
	# $tail - Tail of the command (remaining parameters).
	# $client - File descriptor connected to client.
	# Returns
	# 0 - Requested to exit, caller should shut down.
	# 1 - Continue processing.
	#
	sub newput_user_profile_entry {
	my ($cmd, $tail, $client) = @_;

	my $userinput = "$cmd:$tail";

	my ($udom,$uname,$namespace,$what) =split(/:/,$tail,4);
	if ($namespace eq 'roles') {
	&Failure( $client, "refused\n", $userinput);
	return 1;
	}

	chomp($what);

	my $hashref = &tie_user_hash($udom, $uname, $namespace,
	&GDBM_WRCREAT(),"N",$what);
	if(!$hashref) {
	&Failure( $client, "error: ".($!+0)." tie(GDBM) Failed ".
	"while attempting put\n", $userinput);
	return 1;
	}

	my @pairs=split(/\&/,$what);
	foreach my $pair (@pairs) {
	my ($key,$value)=split(/=/,$pair);
	if (exists($hashref->{$key})) {
	&Failure($client, "key_exists: ".$key."\n",$userinput);
	return 1;
	}
	}

	foreach my $pair (@pairs) {
	my ($key,$value)=split(/=/,$pair);
	$hashref->{$key}=$value;
	}

	if (&untie_user_hash($hashref)) {
	&Reply( $client, "ok\n", $userinput);
	} else {
	&Failure($client, "error: ".($!+0)." untie(GDBM) failed ".
	"while attempting put\n",
	$userinput);
	}
	return 1;
	}
	&register_handler("newput", \&newput_user_profile_entry, 0, 1, 0);

#	#
# Increment a profile entry in the user history file.	# Increment a profile entry in the user history file.
# The history contains keyword value pairs. In this case,	# The history contains keyword value pairs. In this case,
Line 2397 sub increment_user_value_handler {	Line 2547 sub increment_user_value_handler {
my @pairs=split(/\&/,$what);	my @pairs=split(/\&/,$what);
foreach my $pair (@pairs) {	foreach my $pair (@pairs) {
my ($key,$value)=split(/=/,$pair);	my ($key,$value)=split(/=/,$pair);
	$value = &unescape($value);
# We could check that we have a number...	# We could check that we have a number...
if (! defined($value) \|\| $value eq '') {	if (! defined($value) \|\| $value eq '') {
$value = 1;	$value = 1;
}	}
$hashref->{$key}+=$value;	$hashref->{$key}+=$value;
	if ($namespace eq 'nohist_resourcetracker') {
	if ($hashref->{$key} < 0) {
	$hashref->{$key} = 0;
	}
	}
}	}
if (untie(%$hashref)) {	if (&untie_user_hash($hashref)) {
&Reply( $client, "ok\n", $userinput);	&Reply( $client, "ok\n", $userinput);
} else {	} else {
&Failure($client, "error: ".($!+0)." untie(GDBM) failed ".	&Failure($client, "error: ".($!+0)." untie(GDBM) failed ".
Line 2421 sub increment_user_value_handler {	Line 2577 sub increment_user_value_handler {
}	}
&register_handler("inc", \&increment_user_value_handler, 0, 1, 0);	&register_handler("inc", \&increment_user_value_handler, 0, 1, 0);


#	#
# Put a new role for a user. Roles are LonCAPA's packaging of permissions.	# 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	# Each 'role' a user has implies a set of permissions. Adding a new role
Line 2471 sub roles_put_handler {	Line 2626 sub roles_put_handler {
$auth_type);	$auth_type);
$hashref->{$key}=$value;	$hashref->{$key}=$value;
}	}
if (untie($hashref)) {	if (&untie_user_hash($hashref)) {
&Reply($client, "ok\n", $userinput);	&Reply($client, "ok\n", $userinput);
} else {	} else {
&Failure( $client, "error: ".($!+0)." untie(GDBM) Failed ".	&Failure( $client, "error: ".($!+0)." untie(GDBM) Failed ".
Line 2522 sub roles_delete_handler {	Line 2677 sub roles_delete_handler {
foreach my $key (@rolekeys) {	foreach my $key (@rolekeys) {
delete $hashref->{$key};	delete $hashref->{$key};
}	}
if (untie(%$hashref)) {	if (&untie_user_hash($hashref)) {
&Reply($client, "ok\n", $userinput);	&Reply($client, "ok\n", $userinput);
} else {	} else {
&Failure( $client, "error: ".($!+0)." untie(GDBM) Failed ".	&Failure( $client, "error: ".($!+0)." untie(GDBM) Failed ".
Line 2629 sub get_profile_entry_encrypted {	Line 2784 sub get_profile_entry_encrypted {
return 1;	return 1;
}	}
&register_handler("eget", \&get_profile_entry_encrypted, 0, 1, 0);	&register_handler("eget", \&get_profile_entry_encrypted, 0, 1, 0);

#	#
# Deletes a key in a user profile database.	# Deletes a key in a user profile database.
#	#
Line 2647 sub get_profile_entry_encrypted {	Line 2803 sub get_profile_entry_encrypted {
# 0 - Exit server.	# 0 - Exit server.
#	#
#	#

sub delete_profile_entry {	sub delete_profile_entry {
my ($cmd, $tail, $client) = @_;	my ($cmd, $tail, $client) = @_;

Line 2663 sub delete_profile_entry {	Line 2818 sub delete_profile_entry {
foreach my $key (@keys) {	foreach my $key (@keys) {
delete($hashref->{$key});	delete($hashref->{$key});
}	}
if (untie(%$hashref)) {	if (&untie_user_hash($hashref)) {
&Reply($client, "ok\n", $userinput);	&Reply($client, "ok\n", $userinput);
} else {	} else {
&Failure($client, "error: ".($!+0)." untie(GDBM) Failed ".	&Failure($client, "error: ".($!+0)." untie(GDBM) Failed ".
Line 2676 sub delete_profile_entry {	Line 2831 sub delete_profile_entry {
return 1;	return 1;
}	}
&register_handler("del", \&delete_profile_entry, 0, 1, 0);	&register_handler("del", \&delete_profile_entry, 0, 1, 0);

#	#
# List the set of keys that are defined in a profile database file.	# List the set of keys that are defined in a profile database file.
# A successful reply from this will contain an & separated list of	# A successful reply from this will contain an & separated list of
Line 2704 sub get_profile_keys {	Line 2860 sub get_profile_keys {
foreach my $key (keys %$hashref) {	foreach my $key (keys %$hashref) {
$qresult.="$key&";	$qresult.="$key&";
}	}
if (untie(%$hashref)) {	if (&untie_user_hash($hashref)) {
$qresult=~s/\&$//;	$qresult=~s/\&$//;
&Reply($client, "$qresult\n", $userinput);	&Reply($client, "$qresult\n", $userinput);
} else {	} else {
Line 2765 sub dump_profile_database {	Line 2921 sub dump_profile_database {
$data{$symb}->{$param}=$value;	$data{$symb}->{$param}=$value;
$data{$symb}->{'v.'.$param}=$v;	$data{$symb}->{'v.'.$param}=$v;
}	}
if (untie(%$hashref)) {	if (&untie_user_hash($hashref)) {
while (my ($symb,$param_hash) = each(%data)) {	while (my ($symb,$param_hash) = each(%data)) {
while(my ($param,$value) = each (%$param_hash)){	while(my ($param,$value) = each (%$param_hash)){
next if ($param =~ /^v\./); # Ignore versions...	next if ($param =~ /^v\./); # Ignore versions...
Line 2820 sub dump_with_regexp {	Line 2976 sub dump_with_regexp {

my $userinput = "$cmd:$tail";	my $userinput = "$cmd:$tail";

my ($udom,$uname,$namespace,$regexp)=split(/:/,$tail);	my ($udom,$uname,$namespace,$regexp,$range)=split(/:/,$tail);
if (defined($regexp)) {	if (defined($regexp)) {
$regexp=&unescape($regexp);	$regexp=&unescape($regexp);
} else {	} else {
$regexp='.';	$regexp='.';
}	}
	my ($start,$end);
	if (defined($range)) {
	if ($range =~/^(\d+)\-(\d+)$/) {
	($start,$end) = ($1,$2);
	} elsif ($range =~/^(\d+)$/) {
	($start,$end) = (0,$1);
	} else {
	undef($range);
	}
	}
my $hashref = &tie_user_hash($udom, $uname, $namespace,	my $hashref = &tie_user_hash($udom, $uname, $namespace,
&GDBM_READER());	&GDBM_READER());
if ($hashref) {	if ($hashref) {
my $qresult='';	my $qresult='';
	my $count=0;
while (my ($key,$value) = each(%$hashref)) {	while (my ($key,$value) = each(%$hashref)) {
if ($regexp eq '.') {	if ($regexp eq '.') {
	$count++;
	if (defined($range) && $count >= $end) { last; }
	if (defined($range) && $count < $start) { next; }
$qresult.=$key.'='.$value.'&';	$qresult.=$key.'='.$value.'&';
} else {	} else {
my $unescapeKey = &unescape($key);	my $unescapeKey = &unescape($key);
if (eval('$unescapeKey=~/$regexp/')) {	if (eval('$unescapeKey=~/$regexp/')) {
	$count++;
	if (defined($range) && $count >= $end) { last; }
	if (defined($range) && $count < $start) { next; }
$qresult.="$key=$value&";	$qresult.="$key=$value&";
}	}
}	}
}	}
if (untie(%$hashref)) {	if (&untie_user_hash($hashref)) {
chop($qresult);	chop($qresult);
&Reply($client, "$qresult\n", $userinput);	&Reply($client, "$qresult\n", $userinput);
} else {	} else {
Line 2854 sub dump_with_regexp {	Line 3027 sub dump_with_regexp {

return 1;	return 1;
}	}

&register_handler("dump", \&dump_with_regexp, 0, 1, 0);	&register_handler("dump", \&dump_with_regexp, 0, 1, 0);

# Store a set of key=value pairs associated with a versioned name.	# Store a set of key=value pairs associated with a versioned name.
Line 2886 sub store_handler {	Line 3058 sub store_handler {
chomp($what);	chomp($what);
my @pairs=split(/\&/,$what);	my @pairs=split(/\&/,$what);
my $hashref = &tie_user_hash($udom, $uname, $namespace,	my $hashref = &tie_user_hash($udom, $uname, $namespace,
&GDBM_WRCREAT(), "P",	&GDBM_WRCREAT(), "S",
"$rid:$what");	"$rid:$what");
if ($hashref) {	if ($hashref) {
my $now = time;	my $now = time;
Line 2903 sub store_handler {	Line 3075 sub store_handler {
$hashref->{"$version:$rid:timestamp"}=$now;	$hashref->{"$version:$rid:timestamp"}=$now;
$allkeys.='timestamp';	$allkeys.='timestamp';
$hashref->{"$version:keys:$rid"}=$allkeys;	$hashref->{"$version:keys:$rid"}=$allkeys;
if (untie($hashref)) {	if (&untie_user_hash($hashref)) {
&Reply($client, "ok\n", $userinput);	&Reply($client, "ok\n", $userinput);
} else {	} else {
&Failure($client, "error: ".($!+0)." untie(GDBM) Failed ".	&Failure($client, "error: ".($!+0)." untie(GDBM) Failed ".
Line 2920 sub store_handler {	Line 3092 sub store_handler {
return 1;	return 1;
}	}
&register_handler("store", \&store_handler, 0, 1, 0);	&register_handler("store", \&store_handler, 0, 1, 0);

#	#
# Dump out all versions of a resource that has key=value pairs associated	# 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	# with it for each version. These resources are built up via the store
Line 2954 sub restore_handler {	Line 3127 sub restore_handler {
$namespace=~s/\//\_/g;	$namespace=~s/\//\_/g;
$namespace=~s/\W//g;	$namespace=~s/\W//g;
chomp($rid);	chomp($rid);
my $proname=&propath($udom,$uname);
my $qresult='';	my $qresult='';
my %hash;	my $hashref = &tie_user_hash($udom, $uname, $namespace, &GDBM_READER());
if (tie(%hash,'GDBM_File',"$proname/$namespace.db",	if ($hashref) {
&GDBM_READER(),0640)) {	my $version=$hashref->{"version:$rid"};
my $version=$hash{"version:$rid"};
$qresult.="version=$version&";	$qresult.="version=$version&";
my $scope;	my $scope;
for ($scope=1;$scope<=$version;$scope++) {	for ($scope=1;$scope<=$version;$scope++) {
my $vkeys=$hash{"$scope:keys:$rid"};	my $vkeys=$hashref->{"$scope:keys:$rid"};
my @keys=split(/:/,$vkeys);	my @keys=split(/:/,$vkeys);
my $key;	my $key;
$qresult.="$scope:keys=$vkeys&";	$qresult.="$scope:keys=$vkeys&";
foreach $key (@keys) {	foreach $key (@keys) {
$qresult.="$scope:$key=".$hash{"$scope:$rid:$key"}."&";	$qresult.="$scope:$key=".$hashref->{"$scope:$rid:$key"}."&";
}	}
}	}
if (untie(%hash)) {	if (&untie_user_hash($hashref)) {
$qresult=~s/\&$//;	$qresult=~s/\&$//;
&Reply( $client, "$qresult\n", $userinput);	&Reply( $client, "$qresult\n", $userinput);
} else {	} else {
Line 3020 sub send_chat_handler {	Line 3191 sub send_chat_handler {
return 1;	return 1;
}	}
&register_handler("chatsend", \&send_chat_handler, 0, 1, 0);	&register_handler("chatsend", \&send_chat_handler, 0, 1, 0);

#	#
# Retrieve the set of chat messagss from a discussion board.	# Retrieve the set of chat messagss from a discussion board.
#	#
Line 3155 sub reply_query_handler {	Line 3327 sub reply_query_handler {
# $tail - Tail of the command. In this case consists of a colon	# $tail - Tail of the command. In this case consists of a colon
# separated list contaning the domain to apply this to and	# separated list contaning the domain to apply this to and
# an ampersand separated list of keyword=value pairs.	# an ampersand separated list of keyword=value pairs.
	# Each value is a colon separated list that includes:
	# description, institutional code and course owner.
	# For backward compatibility with versions included
	# in LON-CAPA 1.1.X (and earlier) and 1.2.X, institutional
	# code and/or course owner are preserved from the existing
	# record when writing a new record in response to 1.1 or
	# 1.2 implementations of lonnet::flushcourselogs().
	#
# $client - Socket open on the client.	# $client - Socket open on the client.
# Returns:	# Returns:
# 1 - indicating that processing should continue	# 1 - indicating that processing should continue
Line 3168 sub put_course_id_handler {	Line 3348 sub put_course_id_handler {

my $userinput = "$cmd:$tail";	my $userinput = "$cmd:$tail";

my ($udom, $what) = split(/:/, $tail);	my ($udom, $what) = split(/:/, $tail,2);
chomp($what);	chomp($what);
my $now=time;	my $now=time;
my @pairs=split(/\&/,$what);	my @pairs=split(/\&/,$what);
Line 3176 sub put_course_id_handler {	Line 3356 sub put_course_id_handler {
my $hashref = &tie_domain_hash($udom, "nohist_courseids", &GDBM_WRCREAT());	my $hashref = &tie_domain_hash($udom, "nohist_courseids", &GDBM_WRCREAT());
if ($hashref) {	if ($hashref) {
foreach my $pair (@pairs) {	foreach my $pair (@pairs) {
my ($key,$descr,$inst_code)=split(/=/,$pair);	my ($key,$courseinfo) = split(/=/,$pair,2);
$hashref->{$key}=$descr.':'.$inst_code.':'.$now;	$courseinfo =~ s/=/:/g;

	my @current_items = split(/:/,$hashref->{$key});
	shift(@current_items); # remove description
	pop(@current_items); # remove last access
	my $numcurrent = scalar(@current_items);

	my @new_items = split(/:/,$courseinfo);
	my $numnew = scalar(@new_items);
	if ($numcurrent > 0) {
	if ($numnew == 1) { # flushcourselogs() from 1.1 or earlier
	$courseinfo .= ':'.join(':',@current_items);
	} elsif ($numnew == 2) { # flushcourselogs() from 1.2.X
	$courseinfo .= ':'.$current_items[$numcurrent-1];
	}
	}
	$hashref->{$key}=$courseinfo.':'.$now;
}	}
if (untie(%$hashref)) {	if (&untie_domain_hash($hashref)) {
&Reply( $client, "ok\n", $userinput);	&Reply( $client, "ok\n", $userinput);
} else {	} else {
&Failure($client, "error: ".($!+0)	&Failure($client, "error: ".($!+0)
Line 3215 sub put_course_id_handler {	Line 3411 sub put_course_id_handler {
# description - regular expression that is used to filter	# description - regular expression that is used to filter
# the dump. Only keywords matching this regexp	# the dump. Only keywords matching this regexp
# will be used.	# will be used.
	# institutional code - optional supplied code to filter
	# the dump. Only courses with an institutional code
	# that match the supplied code will be returned.
	# owner - optional supplied username of owner to filter
	# the dump. Only courses for which the course
	# owner matches the supplied username will be
	# returned. Implicit assumption that owner
	# is a user in the domain in which the
	# course database is defined.
# $client - The socket open on the client.	# $client - The socket open on the client.
# Returns:	# Returns:
# 1 - Continue processing.	# 1 - Continue processing.
Line 3225 sub dump_course_id_handler {	Line 3430 sub dump_course_id_handler {

my $userinput = "$cmd:$tail";	my $userinput = "$cmd:$tail";

my ($udom,$since,$description) =split(/:/,$tail);	my ($udom,$since,$description,$instcodefilter,$ownerfilter,$coursefilter) =split(/:/,$tail);
if (defined($description)) {	if (defined($description)) {
$description=&unescape($description);	$description=&unescape($description);
} else {	} else {
$description='.';	$description='.';
}	}
	if (defined($instcodefilter)) {
	$instcodefilter=&unescape($instcodefilter);
	} else {
	$instcodefilter='.';
	}
	if (defined($ownerfilter)) {
	$ownerfilter=&unescape($ownerfilter);
	} else {
	$ownerfilter='.';
	}
	if (defined($coursefilter)) {
	$coursefilter=&unescape($coursefilter);
	} else {
	$coursefilter='.';
	}

unless (defined($since)) { $since=0; }	unless (defined($since)) { $since=0; }
my $qresult='';	my $qresult='';
my $hashref = &tie_domain_hash($udom, "nohist_courseids", &GDBM_WRCREAT());	my $hashref = &tie_domain_hash($udom, "nohist_courseids", &GDBM_WRCREAT());
if ($hashref) {	if ($hashref) {
while (my ($key,$value) = each(%$hashref)) {	while (my ($key,$value) = each(%$hashref)) {
my ($descr,$lasttime,$inst_code);	my ($descr,$lasttime,$inst_code,$owner);
if ($value =~ m/^([^\:]):([^\:]):(\d+)$/) {	my @courseitems = split(/:/,$value);
($descr,$inst_code,$lasttime)=($1,$2,$3);	$lasttime = pop(@courseitems);
} else {	($descr,$inst_code,$owner)=@courseitems;
($descr,$lasttime) = split(/\:/,$value);
}
if ($lasttime<$since) { next; }	if ($lasttime<$since) { next; }
if ($description eq '.') {	my $match = 1;
$qresult.=$key.'='.$descr.':'.$inst_code.'&';	unless ($description eq '.') {
} else {	my $unescapeDescr = &unescape($descr);
my $unescapeVal = &unescape($descr);	unless (eval('$unescapeDescr=~/\Q$description\E/i')) {
if (eval('$unescapeVal=~/\Q$description\E/i')) {	$match = 0;
$qresult.=$key.'='.$descr.':'.$inst_code.'&';
}	}
	}
	unless ($instcodefilter eq '.' \|\| !defined($instcodefilter)) {
	my $unescapeInstcode = &unescape($inst_code);
	unless (eval('$unescapeInstcode=~/\Q$instcodefilter\E/i')) {
	$match = 0;
	}
}	}
	unless ($ownerfilter eq '.' \|\| !defined($ownerfilter)) {
	my $unescapeOwner = &unescape($owner);
	unless (eval('$unescapeOwner=~/\Q$ownerfilter\E/i')) {
	$match = 0;
	}
	}
	unless ($coursefilter eq '.' \|\| !defined($coursefilter)) {
	my $unescapeCourse = &unescape($key);
	unless (eval('$unescapeCourse=~/^$udom(_)\Q$coursefilter\E$/')) {
	$match = 0;
	}
	}
	if ($match == 1) {
	$qresult.=$key.'='.$descr.':'.$inst_code.':'.$owner.'&';
	}
}	}
if (untie(%$hashref)) {	if (&untie_domain_hash($hashref)) {
chop($qresult);	chop($qresult);
&Reply($client, "$qresult\n", $userinput);	&Reply($client, "$qresult\n", $userinput);
} else {	} else {
Line 3301 sub put_id_handler {	Line 3540 sub put_id_handler {
my ($key,$value)=split(/=/,$pair);	my ($key,$value)=split(/=/,$pair);
$hashref->{$key}=$value;	$hashref->{$key}=$value;
}	}
if (untie(%$hashref)) {	if (&untie_domain_hash($hashref)) {
&Reply($client, "ok\n", $userinput);	&Reply($client, "ok\n", $userinput);
} else {	} else {
&Failure($client, "error: ".($!+0)." untie(GDBM) Failed ".	&Failure($client, "error: ".($!+0)." untie(GDBM) Failed ".
Line 3314 sub put_id_handler {	Line 3553 sub put_id_handler {

return 1;	return 1;
}	}

&register_handler("idput", \&put_id_handler, 0, 1, 0);	&register_handler("idput", \&put_id_handler, 0, 1, 0);

#	#
# Retrieves a set of id values from the id database.	# Retrieves a set of id values from the id database.
# Returns an & separated list of results, one for each requested id to the	# Returns an & separated list of results, one for each requested id to the
Line 3350 sub get_id_handler {	Line 3589 sub get_id_handler {
for (my $i=0;$i<=$#queries;$i++) {	for (my $i=0;$i<=$#queries;$i++) {
$qresult.="$hashref->{$queries[$i]}&";	$qresult.="$hashref->{$queries[$i]}&";
}	}
if (untie(%$hashref)) {	if (&untie_domain_hash($hashref)) {
$qresult=~s/\&$//;	$qresult=~s/\&$//;
&Reply($client, "$qresult\n", $userinput);	&Reply($client, "$qresult\n", $userinput);
} else {	} else {
Line 3364 sub get_id_handler {	Line 3603 sub get_id_handler {

return 1;	return 1;
}	}
	&register_handler("idget", \&get_id_handler, 0, 1, 0);

register_handler("idget", \&get_id_handler, 0, 1, 0);	#
	# Puts broadcast e-mail sent by Domain Coordinator in nohist_dcmail database
	#
	# Parameters
	# $cmd - Command keyword that caused us to be dispatched.
	# $tail - Tail of the command. Consists of a colon separated:
	# domain - the domain whose dcmail we are recording
	# email Consists of key=value pair
	# where key is unique msgid
	# and value is message (in XML)
	# $client - Socket open on the client.
	#
	# Returns:
	# 1 - indicating processing should continue.
	# Side effects
	# reply is written to $client.
	#
	sub put_dcmail_handler {
	my ($cmd,$tail,$client) = @_;
	my $userinput = "$cmd:$tail";

	my ($udom,$what)=split(/:/,$tail);
	chomp($what);
	my $hashref = &tie_domain_hash($udom, "nohist_dcmail", &GDBM_WRCREAT());
	if ($hashref) {
	my ($key,$value)=split(/=/,$what);
	$hashref->{$key}=$value;
	}
	if (&untie_domain_hash($hashref)) {
	&Reply($client, "ok\n", $userinput);
	} else {
	&Failure($client, "error: ".($!+0)." untie(GDBM) Failed ".
	"while attempting dcmailput\n", $userinput);
	}
	return 1;
	}
	&register_handler("dcmailput", \&put_dcmail_handler, 0, 1, 0);

#	#
	# Retrieves broadcast e-mail from nohist_dcmail database
	# Returns to client an & separated list of key=value pairs,
	# where key is msgid and value is message information.
	#
	# Parameters
	# $cmd - Command keyword that caused us to be dispatched.
	# $tail - Tail of the command. Consists of a colon separated:
	# domain - the domain whose dcmail table we dump
	# startfilter - beginning of time window
	# endfilter - end of time window
	# sendersfilter - & separated list of username:domain
	# for senders to search for.
	# $client - Socket open on the client.
	#
	# Returns:
	# 1 - indicating processing should continue.
	# Side effects
	# reply (& separated list of msgid=messageinfo pairs) is
	# written to $client.
	#
	sub dump_dcmail_handler {
	my ($cmd, $tail, $client) = @_;

	my $userinput = "$cmd:$tail";
	my ($udom,$startfilter,$endfilter,$sendersfilter) = split(/:/,$tail);
	chomp($sendersfilter);
	my @senders = ();
	if (defined($startfilter)) {
	$startfilter=&unescape($startfilter);
	} else {
	$startfilter='.';
	}
	if (defined($endfilter)) {
	$endfilter=&unescape($endfilter);
	} else {
	$endfilter='.';
	}
	if (defined($sendersfilter)) {
	$sendersfilter=&unescape($sendersfilter);
	@senders = map { &unescape($_) } split(/\&/,$sendersfilter);
	}

	my $qresult='';
	my $hashref = &tie_domain_hash($udom, "nohist_dcmail", &GDBM_WRCREAT());
	if ($hashref) {
	while (my ($key,$value) = each(%$hashref)) {
	my $match = 1;
	my ($timestamp,$subj,$uname,$udom) =
	split(/:/,&unescape(&unescape($key)),5); # yes, twice really
	$subj = &unescape($subj);
	unless ($startfilter eq '.' \|\| !defined($startfilter)) {
	if ($timestamp < $startfilter) {
	$match = 0;
	}
	}
	unless ($endfilter eq '.' \|\| !defined($endfilter)) {
	if ($timestamp > $endfilter) {
	$match = 0;
	}
	}
	unless (@senders < 1) {
	unless (grep/^$uname:$udom$/,@senders) {
	$match = 0;
	}
	}
	if ($match == 1) {
	$qresult.=$key.'='.$value.'&';
	}
	}
	if (&untie_domain_hash($hashref)) {
	chop($qresult);
	&Reply($client, "$qresult\n", $userinput);
	} else {
	&Failure($client, "error: ".($!+0)." untie(GDBM) Failed ".
	"while attempting dcmaildump\n", $userinput);
	}
	} else {
	&Failure($client, "error: ".($!+0)." tie(GDBM) Failed ".
	"while attempting dcmaildump\n", $userinput);
	}
	return 1;
	}

	&register_handler("dcmaildump", \&dump_dcmail_handler, 0, 1, 0);

	#
	# Puts domain roles in nohist_domainroles database
	#
	# Parameters
	# $cmd - Command keyword that caused us to be dispatched.
	# $tail - Tail of the command. Consists of a colon separated:
	# domain - the domain whose roles we are recording
	# role - Consists of key=value pair
	# where key is unique role
	# and value is start/end date information
	# $client - Socket open on the client.
	#
	# Returns:
	# 1 - indicating processing should continue.
	# Side effects
	# reply is written to $client.
	#

	sub put_domainroles_handler {
	my ($cmd,$tail,$client) = @_;

	my $userinput = "$cmd:$tail";
	my ($udom,$what)=split(/:/,$tail);
	chomp($what);
	my @pairs=split(/\&/,$what);
	my $hashref = &tie_domain_hash($udom, "nohist_domainroles", &GDBM_WRCREAT());
	if ($hashref) {
	foreach my $pair (@pairs) {
	my ($key,$value)=split(/=/,$pair);
	$hashref->{$key}=$value;
	}
	if (&untie_domain_hash($hashref)) {
	&Reply($client, "ok\n", $userinput);
	} else {
	&Failure($client, "error: ".($!+0)." untie(GDBM) Failed ".
	"while attempting domroleput\n", $userinput);
	}
	} else {
	&Failure( $client, "error: ".($!+0)." tie(GDBM) Failed ".
	"while attempting domroleput\n", $userinput);
	}

	return 1;
	}

	&register_handler("domroleput", \&put_domainroles_handler, 0, 1, 0);

	#
	# Retrieves domain roles from nohist_domainroles database
	# Returns to client an & separated list of key=value pairs,
	# where key is role and value is start and end date information.
	#
	# Parameters
	# $cmd - Command keyword that caused us to be dispatched.
	# $tail - Tail of the command. Consists of a colon separated:
	# domain - the domain whose domain roles table we dump
	# $client - Socket open on the client.
	#
	# Returns:
	# 1 - indicating processing should continue.
	# Side effects
	# reply (& separated list of role=start/end info pairs) is
	# written to $client.
	#
	sub dump_domainroles_handler {
	my ($cmd, $tail, $client) = @_;

	my $userinput = "$cmd:$tail";
	my ($udom,$startfilter,$endfilter,$rolesfilter) = split(/:/,$tail);
	chomp($rolesfilter);
	my @roles = ();
	if (defined($startfilter)) {
	$startfilter=&unescape($startfilter);
	} else {
	$startfilter='.';
	}
	if (defined($endfilter)) {
	$endfilter=&unescape($endfilter);
	} else {
	$endfilter='.';
	}
	if (defined($rolesfilter)) {
	$rolesfilter=&unescape($rolesfilter);
	@roles = split(/\&/,$rolesfilter);
	}

	my $hashref = &tie_domain_hash($udom, "nohist_domainroles", &GDBM_WRCREAT());
	if ($hashref) {
	my $qresult = '';
	while (my ($key,$value) = each(%$hashref)) {
	my $match = 1;
	my ($start,$end) = split(/:/,&unescape($value));
	my ($trole,$uname,$udom,$runame,$rudom,$rsec) = split(/:/,&unescape($key));
	unless ($startfilter eq '.' \|\| !defined($startfilter)) {
	if ($start >= $startfilter) {
	$match = 0;
	}
	}
	unless ($endfilter eq '.' \|\| !defined($endfilter)) {
	if ($end <= $endfilter) {
	$match = 0;
	}
	}
	unless (@roles < 1) {
	unless (grep/^$trole$/,@roles) {
	$match = 0;
	}
	}
	if ($match == 1) {
	$qresult.=$key.'='.$value.'&';
	}
	}
	if (&untie_domain_hash($hashref)) {
	chop($qresult);
	&Reply($client, "$qresult\n", $userinput);
	} else {
	&Failure($client, "error: ".($!+0)." untie(GDBM) Failed ".
	"while attempting domrolesdump\n", $userinput);
	}
	} else {
	&Failure($client, "error: ".($!+0)." tie(GDBM) Failed ".
	"while attempting domrolesdump\n", $userinput);
	}
	return 1;
	}

	&register_handler("domrolesdump", \&dump_domainroles_handler, 0, 1, 0);


# Process the tmpput command I'm not sure what this does.. Seems to	# Process the tmpput command I'm not sure what this does.. Seems to
# create a file in the lonDaemons/tmp directory of the form $id.tmp	# create a file in the lonDaemons/tmp directory of the form $id.tmp
# where Id is the client's ip concatenated with a sequence number.	# where Id is the client's ip concatenated with a sequence number.
Line 3408 sub tmp_put_handler {	Line 3898 sub tmp_put_handler {

}	}
&register_handler("tmpput", \&tmp_put_handler, 0, 1, 0);	&register_handler("tmpput", \&tmp_put_handler, 0, 1, 0);

# Processes the tmpget command. This command returns the contents	# Processes the tmpget command. This command returns the contents
# of a temporary resource file(?) created via tmpput.	# of a temporary resource file(?) created via tmpput.
#	#
Line 3420 sub tmp_put_handler {	Line 3911 sub tmp_put_handler {
# 1 - Inidcating processing can continue.	# 1 - Inidcating processing can continue.
# Side effects:	# Side effects:
# A reply is sent to the client.	# A reply is sent to the client.

#	#
sub tmp_get_handler {	sub tmp_get_handler {
my ($cmd, $id, $client) = @_;	my ($cmd, $id, $client) = @_;
Line 3443 sub tmp_get_handler {	Line 3933 sub tmp_get_handler {
return 1;	return 1;
}	}
&register_handler("tmpget", \&tmp_get_handler, 0, 1, 0);	&register_handler("tmpget", \&tmp_get_handler, 0, 1, 0);

#	#
# Process the tmpdel command. This command deletes a temp resource	# Process the tmpdel command. This command deletes a temp resource
# created by the tmpput command.	# created by the tmpput command.
Line 3476 sub tmp_del_handler {	Line 3967 sub tmp_del_handler {

}	}
&register_handler("tmpdel", \&tmp_del_handler, 0, 1, 0);	&register_handler("tmpdel", \&tmp_del_handler, 0, 1, 0);

#	#
# Processes the setannounce command. This command	# Processes the setannounce command. This command
# creates a file named announce.txt in the top directory of	# creates a file named announce.txt in the top directory of
Line 3514 sub set_announce_handler {	Line 4006 sub set_announce_handler {
return 1;	return 1;
}	}
&register_handler("setannounce", \&set_announce_handler, 0, 1, 0);	&register_handler("setannounce", \&set_announce_handler, 0, 1, 0);

#	#
# Return the version of the daemon. This can be used to determine	# Return the version of the daemon. This can be used to determine
# the compatibility of cross version installations or, alternatively to	# the compatibility of cross version installations or, alternatively to
Line 3538 sub get_version_handler {	Line 4031 sub get_version_handler {
return 1;	return 1;
}	}
&register_handler("version", \&get_version_handler, 0, 1, 0);	&register_handler("version", \&get_version_handler, 0, 1, 0);

# Set the current host and domain. This is used to support	# Set the current host and domain. This is used to support
# multihomed systems. Each IP of the system, or even separate daemons	# multihomed systems. Each IP of the system, or even separate daemons
# on the same IP can be treated as handling a separate lonCAPA virtual	# on the same IP can be treated as handling a separate lonCAPA virtual
Line 3674 sub validate_course_owner_handler {	Line 4168 sub validate_course_owner_handler {
return 1;	return 1;
}	}
&register_handler("autonewcourse", \&validate_course_owner_handler, 0, 1, 0);	&register_handler("autonewcourse", \&validate_course_owner_handler, 0, 1, 0);

#	#
# Validate a course section in the official schedule of classes	# Validate a course section in the official schedule of classes
# from the institutions point of view (part of autoenrollment).	# from the institutions point of view (part of autoenrollment).
Line 3754 sub create_auto_enroll_password_handler	Line 4249 sub create_auto_enroll_password_handler
#	#
# Returns:	# Returns:
# 1 - Continue processing.	# 1 - Continue processing.

sub retrieve_auto_file_handler {	sub retrieve_auto_file_handler {
my ($cmd, $tail, $client) = @_;	my ($cmd, $tail, $client) = @_;
my $userinput = "cmd:$tail";	my $userinput = "cmd:$tail";
Line 3839 sub get_institutional_code_format_handle	Line 4333 sub get_institutional_code_format_handle

return 1;	return 1;
}	}
	&register_handler("autoinstcodeformat",
	\&get_institutional_code_format_handler,0,1,0);

&register_handler("autoinstcodeformat", \&get_institutional_code_format_handler,	# Get domain specific conditions for import of student photographs to a course
0,1,0);

#
#
#	#
	# Retrieves information from photo_permission subroutine in localenroll.
	# Returns outcome (ok) if no processing errors, and whether course owner is
	# required to accept conditions of use (yes/no).
#	#
	#
	sub photo_permission_handler {
	my ($cmd, $tail, $client) = @_;
	my $userinput = "$cmd:$tail";
	my $cdom = $tail;
	my ($perm_reqd,$conditions);
	my $outcome = &localenroll::photo_permission($cdom,\$perm_reqd,
	\$conditions);
	&Reply($client, &escape($outcome.':'.$perm_reqd.':'. $conditions)."\n",
	$userinput);
	}
	&register_handler("autophotopermission",\&photo_permission_handler,0,1,0);

	#
	# Checks if student photo is available for a user in the domain, in the user's
	# directory (in /userfiles/internal/studentphoto.jpg).
	# Uses localstudentphoto:fetch() to ensure there is an up to date copy of
	# the student's photo.

	sub photo_check_handler {
	my ($cmd, $tail, $client) = @_;
	my $userinput = "$cmd:$tail";
	my ($udom,$uname,$pid) = split(/:/,$tail);
	$udom = &unescape($udom);
	$uname = &unescape($uname);
	$pid = &unescape($pid);
	my $path=&propath($udom,$uname).'/userfiles/internal/';
	if (!-e $path) {
	&mkpath($path);
	}
	my $response;
	my $result = &localstudentphoto::fetch($udom,$uname,$pid,\$response);
	$result .= ':'.$response;
	&Reply($client, &escape($result)."\n",$userinput);
	}
	&register_handler("autophotocheck",\&photo_check_handler,0,1,0);

	#
	# Retrieve information from localenroll about whether to provide a button
	# for users who have enbled import of student photos to initiate an
	# update of photo files for registered students. Also include
	# comment to display alongside button.

	sub photo_choice_handler {
	my ($cmd, $tail, $client) = @_;
	my $userinput = "$cmd:$tail";
	my $cdom = &unescape($tail);
	my ($update,$comment) = &localenroll::manager_photo_update($cdom);
	&Reply($client,&escape($update).':'.&escape($comment)."\n",$userinput);
	}
	&register_handler("autophotochoice",\&photo_choice_handler,0,1,0);

#	#
	# Gets a student's photo to exist (in the correct image type) in the user's
	# directory.
	# Formal Parameters:
	# $cmd - The command request that got us dispatched.
	# $tail - A colon separated set of words that will be split into:
	# $domain - student's domain
	# $uname - student username
	# $type - image type desired
	# $client - The socket open on the client.
	# Returns:
	# 1 - continue processing.

	sub student_photo_handler {
	my ($cmd, $tail, $client) = @_;
	my ($domain,$uname,$ext,$type) = split(/:/, $tail);

	my $path=&propath($domain,$uname). '/userfiles/internal/';
	my $filename = 'studentphoto.'.$ext;
	if ($type eq 'thumbnail') {
	$filename = 'studentphoto_tn.'.$ext;
	}
	if (-e $path.$filename) {
	&Reply($client,"ok\n","$cmd:$tail");
	return 1;
	}
	&mkpath($path);
	my $file;
	if ($type eq 'thumbnail') {
	$file=&localstudentphoto::fetch_thumbnail($domain,$uname);
	} else {
	$file=&localstudentphoto::fetch($domain,$uname);
	}
	if (!$file) {
	&Failure($client,"unavailable\n","$cmd:$tail");
	return 1;
	}
	if (!-e $path.$filename) { &convert_photo($file,$path.$filename); }
	if (-e $path.$filename) {
	&Reply($client,"ok\n","$cmd:$tail");
	return 1;
	}
	&Failure($client,"unable_to_convert\n","$cmd:$tail");
	return 1;
	}
	&register_handler("studentphoto", \&student_photo_handler, 0, 1, 0);

	# mkpath makes all directories for a file, expects an absolute path with a
	# file or a trailing / if just a dir is passed
	# returns 1 on success 0 on failure
	sub mkpath {
	my ($file)=@_;
	my @parts=split(/\//,$file,-1);
	my $now=$parts[0].'/'.$parts[1].'/'.$parts[2];
	for (my $i=3;$i<= ($#parts-1);$i++) {
	$now.='/'.$parts[$i];
	if (!-e $now) {
	if (!mkdir($now,0770)) { return 0; }
	}
	}
	return 1;
	}

#---------------------------------------------------------------	#---------------------------------------------------------------
#	#
# Getting, decoding and dispatching requests:	# Getting, decoding and dispatching requests:
#	#

#	#
# Get a Request:	# Get a Request:
# Gets a Request message from the client. The transaction	# Gets a Request message from the client. The transaction
Line 3959 sub process_request {	Line 4567 sub process_request {

}	}

#------------------- Commands not yet in spearate handlers. --------------	print $client "unknown_cmd\n";

#------------------------------- is auto-enrollment enabled?
if ($userinput =~/^autorun/) {
if (isClient) {
my ($cmd,$cdom) = split(/:/,$userinput);
my $outcome = &localenroll::run($cdom);
print $client "$outcome\n";
} else {
print $client "0\n";
}
#------------------------------- get official sections (for auto-enrollment).
} elsif ($userinput =~/^autogetsections/) {
if (isClient) {
my ($cmd,$coursecode,$cdom)=split(/:/,$userinput);
my @secs = &localenroll::get_sections($coursecode,$cdom);
my $seclist = &escape(join(':',@secs));
print $client "$seclist\n";
} else {
print $client "refused\n";
}
#----------------------- validate owner of new course section (for auto-enrollment).
} elsif ($userinput =~/^autonewcourse/) {
if (isClient) {
my ($cmd,$inst_course_id,$owner,$cdom)=split(/:/,$userinput);
my $outcome = &localenroll::new_course($inst_course_id,$owner,$cdom);
print $client "$outcome\n";
} else {
print $client "refused\n";
}
#-------------- validate course section in schedule of classes (for auto-enrollment).
} elsif ($userinput =~/^autovalidatecourse/) {
if (isClient) {
my ($cmd,$inst_course_id,$cdom)=split(/:/,$userinput);
my $outcome=&localenroll::validate_courseID($inst_course_id,$cdom);
print $client "$outcome\n";
} else {
print $client "refused\n";
}
#--------------------------- create password for new user (for auto-enrollment).
} elsif ($userinput =~/^autocreatepassword/) {
if (isClient) {
my ($cmd,$authparam,$cdom)=split(/:/,$userinput);
my ($create_passwd,$authchk);
($authparam,$create_passwd,$authchk) = &localenroll::create_password($authparam,$cdom);
print $client &escape($authparam.':'.$create_passwd.':'.$authchk)."\n";
} else {
print $client "refused\n";
}
#--------------------------- read and remove temporary files (for auto-enrollment).
} elsif ($userinput =~/^autoretrieve/) {
if (isClient) {
my ($cmd,$filename) = split(/:/,$userinput);
my $source = $perlvar{'lonDaemons'}.'/tmp/'.$filename;
if ( (-e $source) && ($filename ne '') ) {
my $reply = '';
if (open(my $fh,$source)) {
while (<$fh>) {
chomp($_);
$_ =~ s/^\s+//g;
$_ =~ s/\s+$//g;
$reply .= $_;
}
close($fh);
print $client &escape($reply)."\n";
# unlink($source);
} else {
print $client "error\n";
}
} else {
print $client "error\n";
}
} else {
print $client "refused\n";
}
#--------------------- read and retrieve institutional code format
# (for support form).
} elsif ($userinput =~/^autoinstcodeformat/) {
if (isClient) {
my $reply;
my($cmd,$cdom,$course) = split(/:/,$userinput);
my @pairs = split/\&/,$course;
my %instcodes = ();
my %codes = ();
my @codetitles = ();
my %cat_titles = ();
my %cat_order = ();
foreach (@pairs) {
my ($key,$value) = split/=/,$_;
$instcodes{&unescape($key)} = &unescape($value);
}
my $formatreply = &localenroll::instcode_format($cdom,\%instcodes,\%codes,\@codetitles,\%cat_titles,\%cat_order);
if ($formatreply eq 'ok') {
my $codes_str = &hash2str(%codes);
my $codetitles_str = &array2str(@codetitles);
my $cat_titles_str = &hash2str(%cat_titles);
my $cat_order_str = &hash2str(%cat_order);
print $client $codes_str.':'.$codetitles_str.':'.$cat_titles_str.':'.$cat_order_str."\n";
}
} else {
print $client "refused\n";
}
# ------------------------------------------------------------- unknown command

} else {
# unknown command
print $client "unknown_cmd\n";
}
# -------------------------------------------------------------------- complete	# -------------------------------------------------------------------- complete
Debug("process_request - returning 1");	Debug("process_request - returning 1");
return 1;	return 1;
Line 4327 sub ReadHostTable {	Line 4828 sub ReadHostTable {
open (CONFIG,"$perlvar{'lonTabDir'}/hosts.tab") \|\| die "Can't read host file";	open (CONFIG,"$perlvar{'lonTabDir'}/hosts.tab") \|\| die "Can't read host file";
my $myloncapaname = $perlvar{'lonHostID'};	my $myloncapaname = $perlvar{'lonHostID'};
Debug("My loncapa name is : $myloncapaname");	Debug("My loncapa name is : $myloncapaname");
	my %name_to_ip;
while (my $configline=<CONFIG>) {	while (my $configline=<CONFIG>) {
if (!($configline =~ /^\s*\#/)) {	if ($configline !~ /^\s\#/ && $configline !~ /^\s$/ ) {
my ($id,$domain,$role,$name,$ip)=split(/:/,$configline);	my ($id,$domain,$role,$name)=split(/:/,$configline);
chomp($ip); $ip=~s/\D+$//;	$name=~s/\s//g;
	my $ip;
	if (!exists($name_to_ip{$name})) {
	$ip = gethostbyname($name);
	if (!$ip \|\| length($ip) ne 4) {
	&logthis("Skipping host $id name $name no IP found\n");
	next;
	}
	$ip=inet_ntoa($ip);
	$name_to_ip{$name} = $ip;
	} else {
	$ip = $name_to_ip{$name};
	}
$hostid{$ip}=$id; # LonCAPA name of host by IP.	$hostid{$ip}=$id; # LonCAPA name of host by IP.
$hostdom{$id}=$domain; # LonCAPA domain name of host.	$hostdom{$id}=$domain; # LonCAPA domain name of host.
$hostip{$id}=$ip; # IP address of host.	$hostname{$id}=$name; # LonCAPA name -> DNS name
	$hostip{$id}=$ip; # IP address of host.
$hostdns{$name} = $id; # LonCAPA name of host by DNS.	$hostdns{$name} = $id; # LonCAPA name of host by DNS.

if ($id eq $perlvar{'lonHostID'}) {	if ($id eq $perlvar{'lonHostID'}) {
Line 4470 sub Reply {	Line 4985 sub Reply {
Debug("Request was $request Reply was $reply");	Debug("Request was $request Reply was $reply");

$Transactions++;	$Transactions++;


}	}


Line 4514 sub logstatus {	Line 5027 sub logstatus {
flock(LOG,LOCK_EX);	flock(LOG,LOCK_EX);
print LOG $$."\t".$clientname."\t".$currenthostid."\t"	print LOG $$."\t".$clientname."\t".$currenthostid."\t"
.$status."\t".$lastlog."\t $keymode\n";	.$status."\t".$lastlog."\t $keymode\n";
flock(DB,LOCK_UN);	flock(LOG,LOCK_UN);
close(LOG);	close(LOG);
}	}
&status("Finished logging");	&status("Finished logging");
Line 4585 sub reconlonc {	Line 5098 sub reconlonc {

sub subreply {	sub subreply {
my ($cmd,$server)=@_;	my ($cmd,$server)=@_;
my $peerfile="$perlvar{'lonSockDir'}/$server";	my $peerfile="$perlvar{'lonSockDir'}/".$hostname{$server};
my $sclient=IO::Socket::UNIX->new(Peer =>"$peerfile",	my $sclient=IO::Socket::UNIX->new(Peer =>"$peerfile",
Type => SOCK_STREAM,	Type => SOCK_STREAM,
Timeout => 10)	Timeout => 10)
or return "con_lost";	or return "con_lost";
print $sclient "$cmd\n";	print $sclient "sethost:$server:$cmd\n";
my $answer=<$sclient>;	my $answer=<$sclient>;
chomp($answer);	chomp($answer);
if (!$answer) { $answer="con_lost"; }	if (!$answer) { $answer="con_lost"; }
Line 4606 sub reply {	Line 5119 sub reply {
$answer=subreply("ping",$server);	$answer=subreply("ping",$server);
if ($answer ne $server) {	if ($answer ne $server) {
&logthis("sub reply: answer != server answer is $answer, server is $server");	&logthis("sub reply: answer != server answer is $answer, server is $server");
&reconlonc("$perlvar{'lonSockDir'}/$server");	&reconlonc("$perlvar{'lonSockDir'}/".$hostname{$server});
}	}
$answer=subreply($cmd,$server);	$answer=subreply($cmd,$server);
}	}
Line 4699 $SIG{USR2} = \&UpdateHosts;	Line 5212 $SIG{USR2} = \&UpdateHosts;

ReadHostTable;	ReadHostTable;

	my $dist=`$perlvar{'lonDaemons'}/distprobe`;

# --------------------------------------------------------------	# --------------------------------------------------------------
# Accept connections. When a connection comes in, it is validated	# Accept connections. When a connection comes in, it is validated
# and if good, a child process is created to process transactions	# and if good, a child process is created to process transactions
Line 4745 sub make_new_child {	Line 5260 sub make_new_child {
if (defined($iaddr)) {	if (defined($iaddr)) {
$clientip = inet_ntoa($iaddr);	$clientip = inet_ntoa($iaddr);
Debug("Connected with $clientip");	Debug("Connected with $clientip");
$clientdns = gethostbyaddr($iaddr, AF_INET);
Debug("Connected with $clientdns by name");
} else {	} else {
&logthis("Unable to determine clientip");	&logthis("Unable to determine clientip");
$clientip='Unavailable';	$clientip='Unavailable';
Line 4776 sub make_new_child {	Line 5289 sub make_new_child {
# my $tmpsnum=0; # Now global	# my $tmpsnum=0; # Now global
#---------------------------------------------------- kerberos 5 initialization	#---------------------------------------------------- kerberos 5 initialization
&Authen::Krb5::init_context();	&Authen::Krb5::init_context();
&Authen::Krb5::init_ets();	unless (($dist eq 'fedora4') \|\| ($dist eq 'suse9.3')) {
	&Authen::Krb5::init_ets();
	}

&status('Accepted connection');	&status('Accepted connection');
# =============================================================================	# =============================================================================
Line 4786 sub make_new_child {	Line 5301 sub make_new_child {

ReadManagerTable; # May also be a manager!!	ReadManagerTable; # May also be a manager!!

my $clientrec=($hostid{$clientip} ne undef);	my $outsideip=$clientip;
my $ismanager=($managers{$clientip} ne undef);	if ($clientip eq '127.0.0.1') {
	$outsideip=$hostip{$perlvar{'lonHostID'}};
	}

	my $clientrec=($hostid{$outsideip} ne undef);
	my $ismanager=($managers{$outsideip} ne undef);
$clientname = "[unknonwn]";	$clientname = "[unknonwn]";
if($clientrec) { # Establish client type.	if($clientrec) { # Establish client type.
$ConnectionType = "client";	$ConnectionType = "client";
$clientname = $hostid{$clientip};	$clientname = $hostid{$outsideip};
if($ismanager) {	if($ismanager) {
$ConnectionType = "both";	$ConnectionType = "both";
}	}
} else {	} else {
$ConnectionType = "manager";	$ConnectionType = "manager";
$clientname = $managers{$clientip};	$clientname = $managers{$outsideip};
}	}
my $clientok;	my $clientok;

Line 4905 sub make_new_child {	Line 5425 sub make_new_child {
# no need to try to do recon's to myself	# no need to try to do recon's to myself
next;	next;
}	}
&reconlonc("$perlvar{'lonSockDir'}/$id");	&reconlonc("$perlvar{'lonSockDir'}/".$hostname{$id});
}	}
&logthis("<font color='green'>Established connection: $clientname</font>");	&logthis("<font color='green'>Established connection: $clientname</font>");
&status('Will listen to '.$clientname);	&status('Will listen to '.$clientname);
Line 4981 sub is_author {	Line 5501 sub is_author {
# 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 manage_permissions	sub manage_permissions {
{


my ($request, $domain, $user, $authtype) = @_;	my ($request, $domain, $user, $authtype) = @_;

&Debug("manage_permissions: $request $domain $user $authtype");	&Debug("manage_permissions: $request $domain $user $authtype");

# See if the request is of the form /$domain/_au	# See if the request is of the form /$domain/_au
if($request =~ /^(\/$domain\/_au)$/) { # It's an author rolesput...	if($request =~ /^(\/\Q$domain\E\/_au)$/) { # It's an author rolesput...
my $execdir = $perlvar{'lonDaemons'};	my $execdir = $perlvar{'lonDaemons'};
my $userhome= "/home/$user" ;	my $userhome= "/home/$user" ;
&logthis("system $execdir/lchtmldir $userhome $user $authtype");	&logthis("system $execdir/lchtmldir $userhome $user $authtype");
Line 5010 sub manage_permissions	Line 5527 sub manage_permissions
#	#
sub password_path {	sub password_path {
my ($domain, $user) = @_;	my ($domain, $user) = @_;
	return &propath($domain, $user).'/passwd';

my $path = &propath($domain, $user);
$path .= "/passwd";

return $path;
}	}

# Password Filename	# Password Filename
Line 5188 sub validate_user {	Line 5700 sub validate_user {
my $krbserver = &Authen::Krb5::parse_name($krbservice);	my $krbserver = &Authen::Krb5::parse_name($krbservice);
my $credentials= &Authen::Krb5::cc_default();	my $credentials= &Authen::Krb5::cc_default();
$credentials->initialize($krbclient);	$credentials->initialize($krbclient);
my $krbreturn = &Authen::KRb5::get_in_tkt_with_password($krbclient,	my $krbreturn = &Authen::Krb5::get_in_tkt_with_password($krbclient,
$krbserver,	$krbserver,
$password,	$password,
$credentials);	$credentials);
Line 5244 sub addline {	Line 5756 sub addline {

sub get_chat {	sub get_chat {
my ($cdom,$cname,$udom,$uname)=@_;	my ($cdom,$cname,$udom,$uname)=@_;
my %hash;
my $proname=&propath($cdom,$cname);
my @entries=();	my @entries=();
if (tie(%hash,'GDBM_File',"$proname/nohist_chatroom.db",	my $hashref = &tie_user_hash($cdom, $cname, 'nohist_chatroom',
&GDBM_READER(),0640)) {	&GDBM_READER());
@entries=map { $_.':'.$hash{$_} } sort keys %hash;	if ($hashref) {
untie %hash;	@entries=map { $_.':'.$hashref->{$_} } sort(keys(%$hashref));
	&untie_user_hash($hashref);
}	}
my @participants=();	my @participants=();
my $cutoff=time-60;	my $cutoff=time-60;
if (tie(%hash,'GDBM_File',"$proname/nohist_inchatroom.db",	$hashref = &tie_user_hash($cdom, $cname, 'nohist_inchatroom',
&GDBM_WRCREAT(),0640)) {	&GDBM_WRCREAT());
$hash{$uname.':'.$udom}=time;	if ($hashref) {
foreach (sort keys %hash) {	$hashref->{$uname.':'.$udom}=time;
if ($hash{$_}>$cutoff) {	foreach my $user (sort(keys(%$hashref))) {
$participants[$#participants+1]='active_participant:'.$_;	if ($hashref->{$user}>$cutoff) {
	push(@participants, 'active_participant:'.$user);
}	}
}	}
untie %hash;	&untie_user_hash($hashref);
}	}
return (@participants,@entries);	return (@participants,@entries);
}	}

sub chat_add {	sub chat_add {
my ($cdom,$cname,$newchat)=@_;	my ($cdom,$cname,$newchat)=@_;
my %hash;
my $proname=&propath($cdom,$cname);
my @entries=();	my @entries=();
my $time=time;	my $time=time;
if (tie(%hash,'GDBM_File',"$proname/nohist_chatroom.db",	my $hashref = &tie_user_hash($cdom, $cname, 'nohist_chatroom',
&GDBM_WRCREAT(),0640)) {	&GDBM_WRCREAT());
@entries=map { $_.':'.$hash{$_} } sort keys %hash;	if ($hashref) {
	@entries=map { $_.':'.$hashref->{$_} } sort(keys(%$hashref));
my ($lastid)=($entries[$#entries]=~/^(\w+)\:/);	my ($lastid)=($entries[$#entries]=~/^(\w+)\:/);
my ($thentime,$idnum)=split(/\_/,$lastid);	my ($thentime,$idnum)=split(/\_/,$lastid);
my $newid=$time.'_000000';	my $newid=$time.'_000000';
Line 5285 sub chat_add {	Line 5797 sub chat_add {
$idnum=substr('000000'.$idnum,-6,6);	$idnum=substr('000000'.$idnum,-6,6);
$newid=$time.'_'.$idnum;	$newid=$time.'_'.$idnum;
}	}
$hash{$newid}=$newchat;	$hashref->{$newid}=$newchat;
my $expired=$time-3600;	my $expired=$time-3600;
foreach (keys %hash) {	foreach my $comment (keys(%$hashref)) {
my ($thistime)=($_=~/(\d+)\_/);	my ($thistime) = ($comment=~/(\d+)\_/);
if ($thistime<$expired) {	if ($thistime<$expired) {
delete $hash{$_};	delete $hashref->{$comment};
}	}
}	}
untie %hash;	{
}	my $proname=&propath($cdom,$cname);
{	if (open(CHATLOG,">>$proname/chatroom.log")) {
my $hfh;	print CHATLOG ("$time:".&unescape($newchat)."\n");
if ($hfh=IO::File->new(">>$proname/chatroom.log")) {	}
print $hfh "$time:".&unescape($newchat)."\n";	close(CHATLOG);
}	}
	&untie_user_hash($hashref);
}	}
}	}

Line 5388 sub thisversion {	Line 5901 sub thisversion {
sub subscribe {	sub subscribe {
my ($userinput,$clientip)=@_;	my ($userinput,$clientip)=@_;
my $result;	my $result;
my ($cmd,$fname)=split(/:/,$userinput);	my ($cmd,$fname)=split(/:/,$userinput,2);
my $ownership=&ishome($fname);	my $ownership=&ishome($fname);
if ($ownership eq 'owner') {	if ($ownership eq 'owner') {
# explitly asking for the current version?	# explitly asking for the current version?
Line 5432 sub subscribe {	Line 5945 sub subscribe {
}	}
return $result;	return $result;
}	}
	# Change the passwd of a unix user. The caller must have
	# first verified that the user is a loncapa user.
	#
	# Parameters:
	# user - Unix user name to change.
	# pass - New password for the user.
	# Returns:
	# ok - if success
	# other - Some meaningfule error message string.
	# NOTE:
	# invokes a setuid script to change the passwd.
	sub change_unix_password {
	my ($user, $pass) = @_;

	&Debug("change_unix_password");
	my $execdir=$perlvar{'lonDaemons'};
	&Debug("Opening lcpasswd pipeline");
	my $pf = IO::File->new("\|$execdir/lcpasswd > "
	."$perlvar{'lonDaemons'}"
	."/logs/lcpasswd.log");
	print $pf "$user\n$pass\n$pass\n";
	close $pf;
	my $err = $?;
	return ($err < @passwderrors) ? $passwderrors[$err] :
	"pwchange_falure - unknown error";


	}


sub make_passwd_file {	sub make_passwd_file {
my ($uname, $umode,$npass,$passfilename)=@_;	my ($uname, $umode,$npass,$passfilename)=@_;
Line 5491 sub make_passwd_file {	Line 6033 sub make_passwd_file {
print $se "$npass\n";	print $se "$npass\n";
print $se "$lc_error_file\n"; # Status -> unique file.	print $se "$lc_error_file\n"; # Status -> unique file.
}	}
my $error = IO::File->new("< $lc_error_file");	if (-r $lc_error_file) {
my $useraddok = <$error>;	&Debug("Opening error file: $lc_error_file");
$error->close;	my $error = IO::File->new("< $lc_error_file");
unlink($lc_error_file);	my $useraddok = <$error>;
	$error->close;
chomp $useraddok;	unlink($lc_error_file);

if($useraddok > 0) {	chomp $useraddok;
my $error_text = &lcuseraddstrerror($useraddok);
&logthis("Failed lcuseradd: $error_text");	if($useraddok > 0) {
$result = "lcuseradd_failed:$error_text\n";	my $error_text = &lcuseraddstrerror($useraddok);
} else {	&logthis("Failed lcuseradd: $error_text");
my $pf = IO::File->new(">$passfilename");	$result = "lcuseradd_failed:$error_text\n";
if($pf) {	} else {
print $pf "unix:\n";	my $pf = IO::File->new(">$passfilename");
} else {	if($pf) {
$result = "pass_file_failed_error";	print $pf "unix:\n";
	} else {
	$result = "pass_file_failed_error";
	}
}	}
	} else {
	&Debug("Could not locate lcuseradd error: $lc_error_file");
	$result="bug_lcuseradd_no_output_file";
}	}
}	}
} elsif ($umode eq 'none') {	} elsif ($umode eq 'none') {
Line 5526 sub make_passwd_file {	Line 6074 sub make_passwd_file {
return $result;	return $result;
}	}

	sub convert_photo {
	my ($start,$dest)=@_;
	system("convert $start $dest");
	}

sub sethost {	sub sethost {
my ($remotereq) = @_;	my ($remotereq) = @_;
my (undef,$hostid)=split(/:/,$remotereq);	my (undef,$hostid)=split(/:/,$remotereq);

FreeBSD-CVSweb <freebsd-cvsweb@FreeBSD.org>

Removed from v.1.261
changed lines
	Added in v.1.317