--- loncom/init.d/loncontrol 2003/02/03 18:03:52 1.10 +++ loncom/init.d/loncontrol 2009/02/02 17:06:55 1.34 @@ -1,55 +1,315 @@ #!/usr/bin/perl # +# $Id: loncontrol,v 1.34 2009/02/02 17:06:55 raeburn Exp $ +# # The LearningOnline Network with CAPA # +# Copyright Michigan State University Board of Trustees +# +# This file is part of the LearningOnline Network with CAPA (LON-CAPA). +# +# LON-CAPA is free software; you can redistribute it and/or modify +# it under the terms of the GNU General Public License as published by +# the Free Software Foundation; either version 2 of the License, or +# (at your option) any later version. +# +# LON-CAPA is distributed in the hope that it will be useful, +# but WITHOUT ANY WARRANTY; without even the implied warranty of +# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +# GNU General Public License for more details. +# +# You should have received a copy of the GNU General Public License +# along with LON-CAPA; if not, write to the Free Software +# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA +# +# /home/httpd/html/adm/gpl.txt +# +# http://www.lon-capa.org/ +# # Startup script for the LON-CAPA network processes # -# YEAR=2000 -# YEAR=2001 -# YEAR=2002 # chkconfig: 345 95 5 -# description: LON-CAPA is a "network of knowledge". It is used to +# description: LON-CAPA is a "network of knowledge". It is used to \ # distribute knowledge resources and instructional management. -# processnames: lonc, lond, lonsql +# processnames: lonc, lond, lonsql, lonmaxima # pidfiles: /home/httpd/perl/logs/lon*.pid # config: /etc/httpd/conf/loncapa.conf # config: /home/httpd/lonTabs/hosts.tab # config: /home/httpd/lonTabs/spare.tab +# SuSE chkconfig/insserv info +### BEGIN INIT INFO +# Provides: loncapa +# Required-Start: mysql apache2 $network $remote_fs +# Required-Stop: +# Default-Start: 3 4 5 +# Default-Stop: +# Description: Starts the LON-CAPA services +### END INIT INFO + +use strict; +use lib '/home/httpd/lib/perl/'; +use LONCAPA::Configuration; -$command=$ARGV[0]; $command=~s/[^a-z]//g; +my $command=$ARGV[0]; $command=~s/[^a-z]//g; $ENV{'PATH'}="/sbin:/bin:/usr/sbin:/usr/bin:/usr/X11R6/bin:/root/bin"; $ENV{'BASH_ENV'}=""; -if (($command eq "restart") or ($command eq "reload")) { +{ # Firewall variable scoping + # Firewall code is based on the code in FC2 /etc/init.d/ntpd + my $fw_chain = 'RH-Firewall-1-INPUT'; + my $iptables = '/sbin/iptables'; + if (! -e $iptables) { + $iptables = '/usr/sbin/iptables'; + if (!-e $iptables) { + print("Unable to find iptables command\n"); + } + } + my $suse_config = "/etc/sysconfig/SuSEfirewall2"; + if (!-e $suse_config) { + if (!-e '/etc/sysconfig/iptables') { + print("Unable to find iptables file containing static definitions\n"); + } + } + my $lond_port = &get_lond_port(); + if (!$lond_port) { + print("Unable to determine lond port number from LON-CAPA configuration.\n"); + } + +sub firewall_open_port { + return 'inactive firewall' if (! &firewall_is_active); + return 'port number unknown' if !$lond_port; + my @opened; + my $suse_config = "/etc/sysconfig/SuSEfirewall2"; + if (-e $suse_config) { + if (open(my $fh,"<$suse_config")) { + while(<$fh>) { + chomp(); + if (/^FW_SERVICES_EXT_TCP="([^"]+)"\s*$/) { + my $portstr = $1; + my @suseports = split(/\s+/,$portstr); + foreach my $port ($lond_port) { + if (grep/^\Q$port\E$/,@suseports) { + push(@opened,$port); + } + } + } + } + } + } else { + if (! `$iptables -L -n 2>/dev/null | grep $fw_chain | wc -l`) { + return 'chain error'; + } + # iptables is running with our chain + # + # We could restrict the servers allowed to attempt to communicate + # here, but the logistics of updating the /home/httpd/lonTabs/host.tab + # file are likely to be a problem + foreach my $port ($lond_port) { + print "Opening firewall access on port $port.\n"; + my $result; + my $firewall_command = + "$iptables -I $fw_chain -p tcp -d 0/0 --dport $port -j ACCEPT"; + system($firewall_command); + my $return_status = $?>>8; + if ($return_status == 1) { + # Error + print "Error opening port.\n"; + } elsif ($return_status == 2) { + # Bad command + print "Bad command error opening port. Command was\n". + " ".$firewall_command."\n"; + } elsif ($return_status == 0) { + push(@opened,$port); + } + } + } + foreach my $port ($lond_port) { + if (!grep(/^\Q$port\E$/,@opened)) { + return 'Required port not open: '.$port."\n"; + } + } + return 'ok'; +} + +sub firewall_is_port_open { + my ($port) = @_; + # returns 1 if the firewall port is open, 0 if not. + # + # check if firewall is active or installed + return if (! &firewall_is_active); + if (`$iptables -L -n 2>/dev/null | grep "tcp dpt:$port"`) { + return 1; + } else { + return 0; + } +} + +sub firewall_is_active { + if (-e '/proc/net/ip_tables_names') { + return 1; + } else { + return 0; + } +} + +sub firewall_close_port { + return 'inactive firewall' if (! &firewall_is_active); + return 'port number unknown' if !$lond_port; + my $suse_config = "/etc/sysconfig/SuSEfirewall2"; + return if (-e $suse_config); + foreach my $port ($lond_port) { + print "Closing firewall access on port $port\n"; + my $firewall_command = + "$iptables -D $fw_chain -p tcp -d 0/0 --dport $port -j ACCEPT"; + system($firewall_command); + my $return_status = $?>>8; + if ($return_status == 1) { + # Error + print "Error closing port.\n"; + } elsif ($return_status == 2) { + # Bad command + print "Bad command error closing port. Command was\n". + " ".$firewall_command."\n"; + } else { + print "Port closed.\n"; + } + } + return; +} + +sub get_lond_port { + my $perlvarref=&LONCAPA::Configuration::read_conf(); + my $lond_port; + if (ref($perlvarref) eq 'HASH') { + if (defined($perlvarref->{'londPort'})) { + $lond_port = $perlvarref->{'londPort'}; + } + } + return $lond_port; +} + +} # End firewall variable scope + +sub stop_daemon { + my ($daemon,$killallname)=@_; + my $pidfile="/home/httpd/perl/logs/$daemon.pid"; + + printf("%-15s ",$daemon); + if (-e $pidfile) { + open(PIDFILE,$pidfile); + my $daemonpid=; + chomp($daemonpid); + kill TERM => $daemonpid; + my $count=0; + while ($count++ < 5 && kill(0 => $daemonpid)) { + sleep 1; + } + if (kill 0 => $daemonpid) { + kill KILL => $daemonpid; + sleep 1; + if (kill 0 => $daemonpid) { + print("failed to kill"); + } else { + print("killed"); + } + } else { + print("stopped"); + } + } else { + print("not running"); + } + system("killall -q -0 $killallname"); + if ($? == 0) { + system("killall -q $killallname"); + print(", killed off extraneous processes"); + } + unlink($pidfile); + print("\n"); +} + +sub clean_sockets { + opendir(SOCKETS,"/home/httpd/sockets/"); + my $perlvarref=&LONCAPA::Configuration::read_conf(); + return if (ref($perlvarref) ne 'HASH'); + while (my $fname=readdir(SOCKETS)) { + next if (-d $fname + || $fname=~/(mysqlsock|maximasock|\Q$perlvarref->{'lonSockDir'}\E)/); + unlink("/home/httpd/sockets/$fname"); + } +} + +if ($command eq "restart") { print 'Restarting LON-CAPA'."\n"; print 'Ending LON-CAPA client and daemon processes'."\n"; - print `su -c '/bin/kill \`/bin/cat /home/httpd/perl/logs/*.pid\`' www`; + foreach my $daemon ('lonsql','lond','lonc','lonmemcached','lonmaxima') { + my $killallname=$daemon; + if ($daemon eq 'lonc') { $killallname='loncnew'; } + &stop_daemon($daemon,$killallname); + } print 'Starting LON-CAPA client and daemon processes (please be patient)'. "\n"; - system("su -c '/home/httpd/perl/loncron' www"); -} -elsif ($command eq "stop") { + system("su www -c '/home/httpd/perl/loncron --justcheckdaemons'"); +} elsif ($command eq "stop") { print 'Stopping LON-CAPA'."\n"; - print `su -c '/bin/kill \`/bin/cat /home/httpd/perl/logs/*.pid\`' www`; -} -elsif ($command eq "start") { - print 'Starting LON-CAPA'."\n"; - print 'Starting LON-CAPA client and daemon processes (please be patient)'. - "\n"; - system("su -c '/home/httpd/perl/loncron' www"); -} -elsif ($command eq "status") { - $response=`/bin/cat /home/httpd/perl/logs/*.pid 2>&1`; + foreach my $daemon ('lonsql','lond','lonc','lonmemcached','lonmaxima') { + my $killallname=$daemon; + if ($daemon eq 'lonc') { $killallname='loncnew'; } + &stop_daemon($daemon,$killallname); + } + my $firewall_result = &firewall_close_port(); + if ($firewall_result) { + print "$firewall_result\n"; + } + &clean_sockets(); +} elsif ($command eq "start") { + my $firewall_result = &firewall_open_port(); + if (($firewall_result eq 'ok') || ($firewall_result eq 'inactive firewall')) { + if ($firewall_result eq 'inactive firewall') { + print "WARNING: iptables firewall is currently inactive\n"; + } + print 'Starting LON-CAPA'."\n"; + print 'Starting LON-CAPA client and daemon processes (please be patient)'. + "\n"; + system("su www -c '/home/httpd/perl/loncron --justcheckdaemons'"); + } else { + print "Not starting LON-CAPA\n"; + if ($firewall_result eq 'port number unknown') { + print "Could not check for status of LON-CAPA port in running firewall - port number unknown. \n"; + } elsif ($firewall_result) { + print "$firewall_result\n"; + } + } +} elsif ($command eq "reload") { + print 'Reload LON-CAPA config files'."\n"; + system("su www -c '/home/httpd/perl/loncron --justreload'"); +} elsif ($command eq "status") { + my $lond_port = &get_lond_port(); + my $response=`/bin/cat /home/httpd/perl/logs/*.pid 2>&1`; if ($response=~/No such file or directory/) { print 'LON-CAPA is not running.'."\n"; - } - else { + } else { print 'LON-CAPA is running.'."\n"; + system("su www -c '/home/httpd/perl/loncron --justcheckconnections'"); } -} -else { - print 'You need to specify restart|stop|start|status on the command line'. - ' argument.'."\n"; + if (! &firewall_is_active) { + print 'The iptables firewall is not active'."\n"; + } + my $lond_port = &get_lond_port(); + if ($lond_port) { + if (&firewall_is_port_open($lond_port)) { + print "The LON-CAPA port ($lond_port) is open in firewall.\n"; + } elsif (&firewall_is_active) { + print "The LON-CAPA port ($lond_port) is NOT open in running firewall!\n"; + } + } else { + if (&firewall_is_active) { + print "Could not check for status of LON-CAPA port in running firewall - port number unknown.\n"; + } else { + print "LON-CAPA port number is unknown, and firewall is not running.\n"; + } + } +} else { + print "You need to specify one of restart|stop|start|status on the command line.\n"; }