loncom/loncnew - diff

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Diff for /loncom/loncnew between versions 1.77 and 1.87

version 1.77, 2007/03/27 19:38:36	version 1.87, 2007/06/18 22:49:52
Line 60 use LONCAPA::Stack;	Line 60 use LONCAPA::Stack;
use LONCAPA::LondConnection;	use LONCAPA::LondConnection;
use LONCAPA::LondTransaction;	use LONCAPA::LondTransaction;
use LONCAPA::Configuration;	use LONCAPA::Configuration;
use LONCAPA::HashIterator;
use Fcntl qw(:flock);	use Fcntl qw(:flock);


Line 73 my %perlvar = %{$perlvarref};	Line 72 my %perlvar = %{$perlvarref};
#	#
# parent and shared variables.	# parent and shared variables.

my %ChildHash; # by pid -> host.	my %ChildPid; # by pid -> host.
my %HostToPid; # By host -> pid.	my %ChildHost; # by host.
my %HostHash; # by loncapaname -> IP.
my %listening_to; # Socket->host table for who the parent	my %listening_to; # Socket->host table for who the parent
# is listening to.	# is listening to.
my %parent_dispatchers; # host-> listener watcher events.	my %parent_dispatchers; # host-> listener watcher events.
Line 96 my $executable = $0; # Get the full	Line 94 my $executable = $0; # Get the full
# The variables below are only used by the child processes.	# The variables below are only used by the child processes.
#	#
my $RemoteHost; # Name of host child is talking to.	my $RemoteHost; # Name of host child is talking to.
	my $RemoteHostId; # default lonid of host child is talking to.
	my @all_host_ids;
my $UnixSocketDir= $perlvar{'lonSockDir'};	my $UnixSocketDir= $perlvar{'lonSockDir'};
my $IdleConnections = Stack->new(); # Set of idle connections	my $IdleConnections = Stack->new(); # Set of idle connections
my %ActiveConnections; # Connections to the remote lond.	my %ActiveConnections; # Connections to the remote lond.
Line 114 my $LondConnecting = 0; # True wh	Line 114 my $LondConnecting = 0; # True wh



my $DieWhenIdle = 1; # When true children die when trimmed -> 0.
my $hosts_tab = 1; # True if we are using a static hosts.tab
my $I_am_child = 0; # True if this is the child process.	my $I_am_child = 0; # True if this is the child process.

#	#
Line 160 sub LogPerm {	Line 158 sub LogPerm {
my $now=time;	my $now=time;
my $local=localtime($now);	my $local=localtime($now);
my $fh=IO::File->new(">>$execdir/logs/lonnet.perm.log");	my $fh=IO::File->new(">>$execdir/logs/lonnet.perm.log");
	chomp($message);
print $fh "$now:$message:$local\n";	print $fh "$now:$message:$local\n";
}	}

Line 309 sub SocketTimeout {	Line 308 sub SocketTimeout {
}	}

}	}

#	#
# This function should be called by the child in all cases where it must	# This function should be called by the child in all cases where it must
# exit. If the child process is running with the DieWhenIdle turned on	# exit. The child process must create a lock file for the AF_UNIX socket
# it must create a lock file for the AF_UNIX socket in order to prevent	# in order to prevent connection requests from lonnet in the time between
# connection requests from lonnet in the time between process exit	# process exit and the parent picking up the listen again.
# and the parent picking up the listen again.	#
# Parameters:	# Parameters:
# exit_code - Exit status value, however see the next parameter.	# exit_code - Exit status value, however see the next parameter.
# message - If this optional parameter is supplied, the exit	# message - If this optional parameter is supplied, the exit
Line 325 sub child_exit {	Line 325 sub child_exit {

# Regardless of how we exit, we may need to do the lock thing:	# Regardless of how we exit, we may need to do the lock thing:

if($DieWhenIdle) {	#
#	# Create a lock file since there will be a time window
# Create a lock file since there will be a time window	# between our exit and the parent's picking up the listen
# between our exit and the parent's picking up the listen	# during which no listens will be done on the
# during which no listens will be done on the	# lonnet client socket.
# lonnet client socket.	#
#	my $lock_file = &GetLoncSocketPath().".lock";
my $lock_file = &GetLoncSocketPath().".lock";	open(LOCK,">$lock_file");
open(LOCK,">$lock_file");	print LOCK "Contents not important";
print LOCK "Contents not important";	close(LOCK);
close(LOCK);	unlink(&GetLoncSocketPath());
if ($hosts_tab) {
unlink(&GetLoncSocketPath());
}
exit(0);
}
# Now figure out how we exit:

if($message) {	if ($message) {
die $message;	die($message);
} else {	} else {
exit($exit_code);	exit($exit_code);
}	}
Line 378 sub Tick {	Line 372 sub Tick {
KillSocket($Socket);	KillSocket($Socket);
$IdleSeconds = 0; # Otherwise all connections get trimmed to fast.	$IdleSeconds = 0; # Otherwise all connections get trimmed to fast.
UpdateStatus();	UpdateStatus();
if(($ConnectionCount == 0) && $DieWhenIdle) {	if(($ConnectionCount == 0)) {
&child_exit(0);	&child_exit(0);

}	}
Line 509 the data and Event->w->fd is the socket	Line 503 the data and Event->w->fd is the socket
sub ClientWritable {	sub ClientWritable {
my $Event = shift;	my $Event = shift;
my $Watcher = $Event->w;	my $Watcher = $Event->w;
	if (!defined($Watcher)) {
	&child_exit(-1,'No watcher for event in ClientWritable');
	}
my $Data = $Watcher->data;	my $Data = $Watcher->data;
my $Socket = $Watcher->fd;	my $Socket = $Watcher->fd;

Line 572 sub ClientWritable {	Line 569 sub ClientWritable {
}	}
} else {	} else {
$Watcher->cancel(); # A delayed request...just cancel.	$Watcher->cancel(); # A delayed request...just cancel.
	return;
}	}
}	}

Line 611 sub CompleteTransaction {	Line 609 sub CompleteTransaction {
StartClientReply($Transaction, $data);	StartClientReply($Transaction, $data);
} else { # Delete deferred transaction file.	} else { # Delete deferred transaction file.
Log("SUCCESS", "A delayed transaction was completed");	Log("SUCCESS", "A delayed transaction was completed");
LogPerm("S:$Transaction->getClient() :".$Transaction->getRequest());	LogPerm("S:".$Transaction->getClient().":".$Transaction->getRequest());
unlink $Transaction->getFile();	unlink($Transaction->getFile());
}	}
}	}

Line 1156 sub LondWritable {	Line 1154 sub LondWritable {
}	}

}	}

=pod	=pod

=cut	=cut


sub QueueDelayed {	sub QueueDelayed {
Debug(3,"QueueDelayed called");	Debug(3,"QueueDelayed called");

Line 1168 sub QueueDelayed {	Line 1168 sub QueueDelayed {
Debug(4, "Delayed path: ".$path);	Debug(4, "Delayed path: ".$path);
opendir(DIRHANDLE, $path);	opendir(DIRHANDLE, $path);

my @all_host_ids;	my $host_id_re = '(?:'.join('\|',map {quotemeta($_)} (@all_host_ids)).')';
my $host_iterator = &LondConnection::GetHostIterator();
while (!$host_iterator->end()) {
my ($host_id,$host_name) = @{$host_iterator->get()}[0,3];
if ($host_name eq $RemoteHost) {
push(@all_host_ids, $host_id);
}
$host_iterator->next();
}
my $host_id_re = '(?:'.join('\|',@all_host_ids).')';
my @alldelayed = grep(/\.$host_id_re$/, readdir(DIRHANDLE));	my @alldelayed = grep(/\.$host_id_re$/, readdir(DIRHANDLE));
closedir(DIRHANDLE);	closedir(DIRHANDLE);
foreach my $dfname (sort(@alldelayed)) {	foreach my $dfname (sort(@alldelayed)) {
Line 1212 sub MakeLondConnection {	Line 1203 sub MakeLondConnection {
.GetServerPort());	.GetServerPort());

my $Connection = LondConnection->new(&GetServerHost(),	my $Connection = LondConnection->new(&GetServerHost(),
&GetServerPort());	&GetServerPort(),
	&GetHostId());

if($Connection eq undef) { # Needs to be more robust later.	if($Connection eq undef) { # Needs to be more robust later.
Log("CRITICAL","Failed to make a connection with lond.");	Log("CRITICAL","Failed to make a connection with lond.");
Line 1220 sub MakeLondConnection {	Line 1212 sub MakeLondConnection {
return 0; # Failure.	return 0; # Failure.
} else {	} else {

	$LondConnecting = 1; # Connection in progress.
# The connection needs to have writability	# The connection needs to have writability
# monitored in order to send the init sequence	# monitored in order to send the init sequence
# that starts the whole authentication/key	# that starts the whole authentication/key
Line 1250 sub MakeLondConnection {	Line 1243 sub MakeLondConnection {
}	}
Log("SUCESS", "Created connection ".$ConnectionCount	Log("SUCESS", "Created connection ".$ConnectionCount
." to host ".GetServerHost());	." to host ".GetServerHost());
$LondConnecting = 1; # Connection in progress.
return 1; # Return success.	return 1; # Return success.
}	}

Line 1391 sub ClientRequest {	Line 1383 sub ClientRequest {
$data = $data.$thisread; # Append new data.	$data = $data.$thisread; # Append new data.
$watcher->data($data);	$watcher->data($data);
if($data =~ /\n$/) { # Request entirely read.	if($data =~ /\n$/) { # Request entirely read.
if($data eq "close_connection_exit\n") {	if ($data eq "close_connection_exit\n") {
Log("CRITICAL",	Log("CRITICAL",
"Request Close Connection ... exiting");	"Request Close Connection ... exiting");
CloseAllLondConnections();	CloseAllLondConnections();
exit;	exit;
	} elsif ($data eq "reset_retries\n") {
	Log("INFO", "Resetting Connection Retries.");
	$ConnectionRetriesLeft = $ConnectionRetries;
	&UpdateStatus();
	my $Transaction = LondTransaction->new($data);
	$Transaction->SetClient($socket);
	StartClientReply($Transaction, "ok\n");
	$watcher->cancel();
	return;
}	}
Debug(8, "Complete transaction received: ".$data);	Debug(8, "Complete transaction received: ".$data);
if($LogTransactions) {	if ($LogTransactions) {
Log("SUCCESS", "Transaction: '$data'"); # Transaction has \n.	Log("SUCCESS", "Transaction: '$data'"); # Transaction has \n.
}	}
my $Transaction = LondTransaction->new($data);	my $Transaction = LondTransaction->new($data);
Line 1413 sub ClientRequest {	Line 1414 sub ClientRequest {
# Accept a connection request for a client (lonc child) and	# Accept a connection request for a client (lonc child) and
# start up an event watcher to keep an eye on input from that	# start up an event watcher to keep an eye on input from that
# Event. This can be called both from NewClient and from	# Event. This can be called both from NewClient and from
# ChildProcess if we are started in DieWhenIdle mode.	# ChildProcess.
# Parameters:	# Parameters:
# $socket - The listener socket.	# $socket - The listener socket.
# Returns:	# Returns:
Line 1502 sub GetServerHost {	Line 1503 sub GetServerHost {

=pod	=pod

	=head2 GetServerId

	Returns the hostid whose lond we talk with.

	=cut

	sub GetHostId {
	return $RemoteHostId; # Setup by the fork.
	}

	=pod

=head2 GetServerPort	=head2 GetServerPort

Returns the lond port number.	Returns the lond port number.
Line 1529 another event handler to subess requests	Line 1542 another event handler to subess requests
=cut	=cut

sub SetupLoncListener {	sub SetupLoncListener {
	my ($host,$SocketName) = @_;
	if (!$host) { $host = &GetServerHost(); }
	if (!$SocketName) { $SocketName = &GetLoncSocketPath($host); }

my $host = GetServerHost(); # Default host.
if (@_) {
($host) = @_ # Override host with parameter.
}

my $socket;
my $SocketName = GetLoncSocketPath($host);
unlink($SocketName);	unlink($SocketName);

	my $socket;
unless ($socket =IO::Socket::UNIX->new(Local => $SocketName,	unless ($socket =IO::Socket::UNIX->new(Local => $SocketName,
Listen => 250,	Listen => 250,
Type => SOCK_STREAM)) {	Type => SOCK_STREAM)) {
Line 1666 Optional parameter:	Line 1678 Optional parameter:
=cut	=cut

sub ChildProcess {	sub ChildProcess {
# If we are in DieWhenIdle mode, we've inherited all the	# We've inherited all the
# events of our parent and those have to be cancelled or else	# events of our parent and those have to be cancelled or else
# all holy bloody chaos will result.. trust me, I already made	# all holy bloody chaos will result.. trust me, I already made
# >that< mistake.	# >that< mistake.
Line 1742 sub ChildProcess {	Line 1754 sub ChildProcess {

# &MakeLondConnection(); // let first work request do it.	# &MakeLondConnection(); // let first work request do it.

# If We are in diwhenidle, need to accept the connection since the	# need to accept the connection since the event may not fire.
# event may not fire.

if ($DieWhenIdle) {	&accept_client($socket);
&accept_client($socket);
}

Debug(9,"Entering event loop");	Debug(9,"Entering event loop");
my $ret = Event::loop(); # Start the main event loop.	my $ret = Event::loop(); # Start the main event loop.
Line 1759 sub ChildProcess {	Line 1768 sub ChildProcess {
# Create a new child for host passed in:	# Create a new child for host passed in:

sub CreateChild {	sub CreateChild {
my ($host, $socket) = @_;	my ($host, $hostid) = @_;

my $sigset = POSIX::SigSet->new(SIGINT);	my $sigset = POSIX::SigSet->new(SIGINT);
sigprocmask(SIG_BLOCK, $sigset);	sigprocmask(SIG_BLOCK, $sigset);
Line 1768 sub CreateChild {	Line 1777 sub CreateChild {
my $pid = fork;	my $pid = fork;
if($pid) { # Parent	if($pid) { # Parent
$RemoteHost = "Parent";	$RemoteHost = "Parent";
$ChildHash{$pid} = $host;	$ChildPid{$pid} = $host;
$HostToPid{$host}= $pid;
sigprocmask(SIG_UNBLOCK, $sigset);	sigprocmask(SIG_UNBLOCK, $sigset);
	undef(@all_host_ids);
} else { # child.	} else { # child.
	$RemoteHostId = $hostid;
ShowStatus("Connected to ".$RemoteHost);	ShowStatus("Connected to ".$RemoteHost);
$SIG{INT} = 'DEFAULT';	$SIG{INT} = 'DEFAULT';
sigprocmask(SIG_UNBLOCK, $sigset);	sigprocmask(SIG_UNBLOCK, $sigset);
if(defined $socket) {	&ChildProcess(); # Does not return.
&ChildProcess($socket);
} else {
ChildProcess; # Does not return.
}
}	}
}	}

Line 1808 sub parent_client_connection {	Line 1813 sub parent_client_connection {
my ($event) = @_;	my ($event) = @_;
my $watcher = $event->w;	my $watcher = $event->w;
my $socket = $watcher->fd;	my $socket = $watcher->fd;
if ($hosts_tab) {	my $connection = $socket->accept(); # Accept the client connection.
	Event->io(cb => \&get_remote_hostname,
# Lookup the host associated with this socket:	poll => 'r',
	data => "",
my $host = $listening_to{$socket};	fd => $connection);

# Start the child:



&Debug(9,"Creating child for $host (parent_client_connection)");
&CreateChild($host, $socket);

# Clean up the listen since now the child takes over until it exits.

$watcher->cancel(); # Nolonger listening to this event
delete($listening_to{$socket});
delete($parent_dispatchers{$host});
$socket->close();

} else {
my $connection = $socket->accept(); # Accept the client connection.
Event->io(cb => \&get_remote_hostname,
poll => 'r',
data => "",
fd => $connection);
}
}	}
}	}

sub get_remote_hostname {	sub get_remote_hostname {
my ($event) = @_;	my ($event) = @_;
my $watcher = $event->w;	my $watcher = $event->w;
my $socket = $watcher->fd;	my $socket = $watcher->fd;

my $thisread;
my $rv = $socket->recv($thisread, 1, 0);
Debug(8, "rcv: data length = ".length($thisread)." read =".$thisread);
if (!defined($rv) \|\| length($thisread) == 0) {
# Likely eof on socket.
Debug(5,"Client Socket closed on lonc for p_c_c");
close($socket);
$watcher->cancel();
return;
}

my $data = $watcher->data().$thisread;	my $thisread;
$watcher->data($data);	my $rv = $socket->recv($thisread, POSIX::BUFSIZ, 0);
if($data =~ /\n$/) { # Request entirely read.	Debug(8, "rcv: data length = ".length($thisread)." read =".$thisread);
chomp($data);	if (!defined($rv) \|\| length($thisread) == 0) {
} else {	# Likely eof on socket.
return;	Debug(5,"Client Socket closed on lonc for p_c_c");
}	close($socket);
	$watcher->cancel();
&Debug(5,"Creating child for $data (parent_client_connection)");	return;
&CreateChild($data);	}

# Clean up the listen since now the child takes over until it exits.	my $data = $watcher->data().$thisread;
$watcher->cancel(); # Nolonger listening to this event	$watcher->data($data);
$socket->send("done\n");	if($data =~ /\n$/) { # Request entirely read.
$socket->close();	chomp($data);
	} else {
	return;
	}

	&Debug(5,"Creating child for $data (parent_client_connection)");
	(my $hostname,my $lonid,@all_host_ids) = split(':',$data);
	$ChildHost{$hostname}++;
	if ($ChildHost{$hostname} == 1) {
	&CreateChild($hostname,$lonid);
	} else {
	&Log('WARNING',"Request for a second child on $hostname");
	}
	# Clean up the listen since now the child takes over until it exits.
	$watcher->cancel(); # Nolonger listening to this event
	$socket->send("done\n");
	$socket->close();
}	}

# parent_listen:	# parent_listen:
Line 1890 sub parent_listen {	Line 1878 sub parent_listen {
my ($loncapa_host) = @_;	my ($loncapa_host) = @_;
Debug(5, "parent_listen: $loncapa_host");	Debug(5, "parent_listen: $loncapa_host");

my $socket = &SetupLoncListener($loncapa_host);	my ($socket,$file);
	if (!$loncapa_host) {
	$loncapa_host = 'common_parent';
	$file = $perlvar{'lonSockCreate'};
	} else {
	$file = &GetLoncSocketPath($loncapa_host);
	}
	$socket = &SetupLoncListener($loncapa_host,$file);

$listening_to{$socket} = $loncapa_host;	$listening_to{$socket} = $loncapa_host;
if (!$socket) {	if (!$socket) {
die "Unable to create a listen socket for $loncapa_host";	die "Unable to create a listen socket for $loncapa_host";
}	}

my $lock_file = &GetLoncSocketPath($loncapa_host).".lock";	my $lock_file = $file.".lock";
unlink($lock_file); # No problem if it doesn't exist yet [startup e.g.]	unlink($lock_file); # No problem if it doesn't exist yet [startup e.g.]

my $watcher =	my $watcher =
Line 1911 sub parent_listen {	Line 1907 sub parent_listen {

sub parent_clean_up {	sub parent_clean_up {
my ($loncapa_host) = @_;	my ($loncapa_host) = @_;
Debug(5, "parent_clean_up: $loncapa_host");	Debug(1, "parent_clean_up: $loncapa_host");

my $socket_file = &GetLoncSocketPath($loncapa_host);	my $socket_file = &GetLoncSocketPath($loncapa_host);
unlink($socket_file); # No problem if it doesn't exist yet [startup e.g.]	unlink($socket_file); # No problem if it doesn't exist yet [startup e.g.]
Line 1920 sub parent_clean_up {	Line 1916 sub parent_clean_up {
}	}


# listen_on_all_unix_sockets:
# This sub initiates a listen on all unix domain lonc client sockets.	# This sub initiates a listen on the common unix domain lonc client socket.
# This will be called in the case where we are trimming idle processes.	# loncnew starts up with no children, and only spawns off children when a
# When idle processes are trimmed, loncnew starts up with no children,	# connection request occurs on the common client unix socket. The spawned
# and only spawns off children when a connection request occurs on the	# child continues to run until it has been idle a while at which point it
# client unix socket. The spawned child continues to run until it has	# eventually exits and once more the parent picks up the listen.
# been idle a while at which point it eventually exits and once more
# the parent picks up the listen.
#	#
# Parameters:	# Parameters:
# NONE	# NONE
Line 1936 sub parent_clean_up {	Line 1930 sub parent_clean_up {
# Returns:	# Returns:
# NONE	# NONE
#	#
sub listen_on_all_unix_sockets {
Debug(5, "listen_on_all_unix_sockets");
my $host_iterator = &LondConnection::GetHostIterator();
while (!$host_iterator->end()) {
my $host_entry_ref = $host_iterator->get();
my $host_name = $host_entry_ref->[3];
Debug(9, "Listen for $host_name");
&parent_listen($host_name);
$host_iterator->next();
}
}

sub listen_on_common_socket {	sub listen_on_common_socket {
Debug(5, "listen_on_common_socket");	Debug(5, "listen_on_common_socket");
&parent_listen('common');	&parent_listen();
}	}

# server_died is called whenever a child process exits.	# server_died is called whenever a child process exits.
Line 1972 sub server_died {	Line 1954 sub server_died {
}	}
# need the host to restart:	# need the host to restart:

my $host = $ChildHash{$pid};	my $host = $ChildPid{$pid};
if($host) { # It's for real...	if($host) { # It's for real...
&Debug(9, "Caught sigchild for $host");	&Debug(9, "Caught sigchild for $host");
delete($ChildHash{$pid});	delete($ChildPid{$pid});
delete($HostToPid{$host});	delete($ChildHost{$host});
if ($hosts_tab) {	&parent_clean_up($host);
&parent_listen($host);
} else {
&parent_clean_up($host);
}

} else {	} else {
&Debug(5, "Caught sigchild for pid not in hosts hash: $pid");	&Debug(5, "Caught sigchild for pid not in hosts hash: $pid");
}	}
Line 2038 ShowStatus("Forking node servers");	Line 2016 ShowStatus("Forking node servers");
Log("CRITICAL", "--------------- Starting children ---------------");	Log("CRITICAL", "--------------- Starting children ---------------");

LondConnection::ReadConfig; # Read standard config files.	LondConnection::ReadConfig; # Read standard config files.
my $HostIterator = LondConnection::GetHostIterator;

if ($DieWhenIdle) {	$RemoteHost = "[parent]";
$RemoteHost = "[parent]";	&listen_on_common_socket();
if ($hosts_tab) {
&listen_on_all_unix_sockets();
} else {
&listen_on_common_socket();
}
} else {

while (! $HostIterator->end()) {

my $hostentryref = $HostIterator->get();
CreateChild($hostentryref->[0]);
$HostHash{$hostentryref->[0]} = $hostentryref->[4];
$HostIterator->next();
}
}

$RemoteHost = "Parent Server";	$RemoteHost = "Parent Server";

Line 2065 $RemoteHost = "Parent Server";	Line 2027 $RemoteHost = "Parent Server";
ShowStatus("Parent keeping the flock");	ShowStatus("Parent keeping the flock");


if ($DieWhenIdle) {	# We need to setup a SIGChild event to handle the exit (natural or otherwise)
# We need to setup a SIGChild event to handle the exit (natural or otherwise)	# of the children.
# of the children.

Event->signal(cb => \&server_died,
desc => "Child exit handler",
signal => "CHLD");


# Set up all the other signals we set up. We'll vector them off to the
# same subs as we would for DieWhenIdle false and, if necessary, conditionalize
# the code there.

$parent_handlers{INT} = Event->signal(cb => \&Terminate,
desc => "Parent INT handler",
signal => "INT");
$parent_handlers{TERM} = Event->signal(cb => \&Terminate,
desc => "Parent TERM handler",
signal => "TERM");
if ($hosts_tab) {
$parent_handlers{HUP} = Event->signal(cb => \&Restart,
desc => "Parent HUP handler.",
signal => "HUP");
} else {
$parent_handlers{HUP} = Event->signal(cb => \&KillThemAll,
desc => "Parent HUP handler.",
signal => "HUP");
}
$parent_handlers{USR1} = Event->signal(cb => \&CheckKids,
desc => "Parent USR1 handler",
signal => "USR1");
$parent_handlers{USR2} = Event->signal(cb => \&UpdateKids,
desc => "Parent USR2 handler.",
signal => "USR2");

# Start procdesing events.

$Event::DebugLevel = $DebugLevel;
Debug(9, "Parent entering event loop");
my $ret = Event::loop();
die "Main Event loop exited: $ret";


} else {
#
# Set up parent signals:
#

$SIG{INT} = \&Terminate;
$SIG{TERM} = \&Terminate;
if ($hosts_tab) {
$SIG{HUP} = \&Restart;
} else {
$SIG{HUP} = \&KillThemAll;
}
$SIG{USR1} = \&CheckKids;
$SIG{USR2} = \&UpdateKids; # LonManage update request.

while(1) {
my $deadchild = wait();
if(exists $ChildHash{$deadchild}) { # need to restart.
my $deadhost = $ChildHash{$deadchild};
delete($HostToPid{$deadhost});
delete($ChildHash{$deadchild});
Log("WARNING","Lost child pid= ".$deadchild.
"Connected to host ".$deadhost);
Log("INFO", "Restarting child procesing ".$deadhost);
CreateChild($deadhost);
}
}
}

	Event->signal(cb => \&server_died,
	desc => "Child exit handler",
	signal => "CHLD");


	# Set up all the other signals we set up.

	$parent_handlers{INT} = Event->signal(cb => \&Terminate,
	desc => "Parent INT handler",
	signal => "INT");
	$parent_handlers{TERM} = Event->signal(cb => \&Terminate,
	desc => "Parent TERM handler",
	signal => "TERM");
	$parent_handlers{HUP} = Event->signal(cb => \&KillThemAll,
	desc => "Parent HUP handler.",
	signal => "HUP");
	$parent_handlers{USR1} = Event->signal(cb => \&CheckKids,
	desc => "Parent USR1 handler",
	signal => "USR1");
	$parent_handlers{USR2} = Event->signal(cb => \&UpdateKids,
	desc => "Parent USR2 handler.",
	signal => "USR2");

	# Start procdesing events.

	$Event::DebugLevel = $DebugLevel;
	Debug(9, "Parent entering event loop");
	my $ret = Event::loop();
	die "Main Event loop exited: $ret";

=pod	=pod

Line 2160 sub CheckKids {	Line 2082 sub CheckKids {
foreach my $host (keys %parent_dispatchers) {	foreach my $host (keys %parent_dispatchers) {
print $fh "LONC Parent process listening for $host\n";	print $fh "LONC Parent process listening for $host\n";
}	}
foreach my $pid (keys %ChildHash) {	foreach my $pid (keys %ChildPid) {
Debug(2, "Sending USR1 -> $pid");	Debug(2, "Sending USR1 -> $pid");
kill 'USR1' => $pid; # Tell Child to report status.	kill 'USR1' => $pid; # Tell Child to report status.
}	}
Line 2204 sub UpdateKids {	Line 2126 sub UpdateKids {
# The down side is transactions that are in flight will get timed out	# The down side is transactions that are in flight will get timed out
# (lost unless they are critical).	# (lost unless they are critical).

if ($hosts_tab) {	&KillThemAll();
&Restart();
} else {
&KillThemAll();
}
}	}


Line 2241 SIGHUP. Responds to sigint and sigterm.	Line 2159 SIGHUP. Responds to sigint and sigterm.

sub KillThemAll {	sub KillThemAll {
Debug(2, "Kill them all!!");	Debug(2, "Kill them all!!");
local($SIG{CHLD}) = 'IGNORE'; # Our children >will< die.
foreach my $pid (keys %ChildHash) {	#local($SIG{CHLD}) = 'IGNORE';
my $serving = $ChildHash{$pid};	# Our children >will< die.
	# but we need to catch their death and cleanup after them in case this is
	# a restart set of kills
	my @allpids = keys(%ChildPid);
	foreach my $pid (@allpids) {
	my $serving = $ChildPid{$pid};
ShowStatus("Nicely Killing lonc for $serving pid = $pid");	ShowStatus("Nicely Killing lonc for $serving pid = $pid");
Log("CRITICAL", "Nicely Killing lonc for $serving pid = $pid");	Log("CRITICAL", "Nicely Killing lonc for $serving pid = $pid");
kill 'QUIT' => $pid;	kill 'QUIT' => $pid;
}	}
	ShowStatus("Finished killing child processes off.");
}	}


Line 2259 sub really_kill_them_all_dammit	Line 2183 sub really_kill_them_all_dammit
{	{
Debug(2, "Kill them all Dammit");	Debug(2, "Kill them all Dammit");
local($SIG{CHLD} = 'IGNORE'); # In case some purist reenabled them.	local($SIG{CHLD} = 'IGNORE'); # In case some purist reenabled them.
foreach my $pid (keys %ChildHash) {	foreach my $pid (keys %ChildPid) {
my $serving = $ChildHash{$pid};	my $serving = $ChildPid{$pid};
&ShowStatus("Nastily killing lonc for $serving pid = $pid");	&ShowStatus("Nastily killing lonc for $serving pid = $pid");
Log("CRITICAL", "Nastily killing lonc for $serving pid = $pid");	Log("CRITICAL", "Nastily killing lonc for $serving pid = $pid");
kill 'KILL' => $pid;	kill 'KILL' => $pid;
delete($ChildHash{$pid});	delete($ChildPid{$pid});
my $execdir = $perlvar{'lonDaemons'};	my $execdir = $perlvar{'lonDaemons'};
unlink("$execdir/logs/lonc.pid");	unlink("$execdir/logs/lonc.pid");
}	}
Line 2292 sub Terminate {	Line 2216 sub Terminate {
exit 0;	exit 0;

}	}

	sub my_hostname {
	use Sys::Hostname;
	my $name = &hostname();
	&Debug(9,"Name is $name");
	return $name;
	}

=pod	=pod

=head1 Theory	=head1 Theory

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

Removed from v.1.77
changed lines
	Added in v.1.87