1: #!/usr/bin/perl
2: #
3: # $Id: loncontrol,v 1.33 2008/11/04 21:06:31 www Exp $
4: #
5: # The LearningOnline Network with CAPA
6: #
7: # Copyright Michigan State University Board of Trustees
8: #
9: # This file is part of the LearningOnline Network with CAPA (LON-CAPA).
10: #
11: # LON-CAPA is free software; you can redistribute it and/or modify
12: # it under the terms of the GNU General Public License as published by
13: # the Free Software Foundation; either version 2 of the License, or
14: # (at your option) any later version.
15: #
16: # LON-CAPA is distributed in the hope that it will be useful,
17: # but WITHOUT ANY WARRANTY; without even the implied warranty of
18: # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
19: # GNU General Public License for more details.
20: #
21: # You should have received a copy of the GNU General Public License
22: # along with LON-CAPA; if not, write to the Free Software
23: # Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
24: #
25: # /home/httpd/html/adm/gpl.txt
26: #
27: # http://www.lon-capa.org/
28: #
29: # Startup script for the LON-CAPA network processes
30: #
31:
32: # chkconfig: 345 95 5
33: # description: LON-CAPA is a "network of knowledge". It is used to \
34: # distribute knowledge resources and instructional management.
35: # processnames: lonc, lond, lonsql, lonmaxima
36: # pidfiles: /home/httpd/perl/logs/lon*.pid
37: # config: /etc/httpd/conf/loncapa.conf
38: # config: /home/httpd/lonTabs/hosts.tab
39: # config: /home/httpd/lonTabs/spare.tab
40: # SuSE chkconfig/insserv info
41: ### BEGIN INIT INFO
42: # Provides: loncapa
43: # Required-Start: mysql apache2 $network $remote_fs
44: # Required-Stop:
45: # Default-Start: 3 4 5
46: # Default-Stop:
47: # Description: Starts the LON-CAPA services
48: ### END INIT INFO
49:
50:
51: $command=$ARGV[0]; $command=~s/[^a-z]//g;
52:
53: $ENV{'PATH'}="/sbin:/bin:/usr/sbin:/usr/bin:/usr/X11R6/bin:/root/bin";
54: $ENV{'BASH_ENV'}="";
55:
56: { # Firewall variable scoping
57: # Firewall code is based on the code in FC2 /etc/init.d/ntpd
58: my $fw_chain = 'RH-Firewall-1-INPUT';
59: my $iptables = '/sbin/iptables';
60: if (! -e $iptables) {
61: $iptables = '/usr/sbin/iptables';
62: if (! -e $iptables) {
63: print("Unable to find iptables command\n");
64: }
65: }
66: my $lond_port = 5663;
67:
68: sub firewall_open_port {
69: return if (! &firewall_is_active);
70: if (! `$iptables -L -n 2>/dev/null | grep $fw_chain | wc -l`) { return; }
71: # iptables is running with our chain
72: #
73: # We could restrict the servers allowed to attempt to communicate
74: # here, but the logistics of updating the /home/httpd/lonTabs/host.tab
75: # file are likely to be a problem
76: foreach my $port ($lond_port) {
77: print "Opening firewall access on port $port.\n";
78:
79: my $firewall_command =
80: "$iptables -I $fw_chain -p tcp -d 0/0 --dport $port -j ACCEPT";
81: system($firewall_command);
82: my $return_status = $?>>8;
83: if ($return_status == 1) {
84: # Error
85: print "Error opening port.\n";
86: } elsif ($return_status == 2) {
87: # Bad command
88: print "Bad command error opening port. Command was\n".
89: " ".$firewall_command."\n";
90: }
91: }
92:
93: }
94:
95: sub firewall_is_port_open {
96: # returns 1 if the firewall port is open, 0 if not.
97: #
98: # check if firewall is active or installed
99: return if (! &firewall_is_active);
100: if (`$iptables -L -n 2>/dev/null | grep "tcp dpt:$port"`) {
101: return 1;
102: } else {
103: return 0;
104: }
105: }
106:
107: sub firewall_is_active {
108: if (-e '/proc/net/ip_tables_names') {
109: return 1;
110: } else {
111: return 0;
112: }
113: }
114:
115: sub firewall_close_port {
116: return if (! &firewall_is_active);
117: foreach my $port ($lond_port) {
118: print "Closing firewall access on port $port.\n";
119: my $firewall_command =
120: "$iptables -D $fw_chain -p tcp -d 0/0 --dport $port -j ACCEPT";
121: system($firewall_command);
122: my $return_status = $?>>8;
123: if ($return_status == 1) {
124: # Error
125: print "Error closing port.\n";
126: } elsif ($return_status == 2) {
127: # Bad command
128: print "Bad command error closing port. Command was\n".
129: " ".$firewall_command."\n";
130: }
131: }
132: }
133:
134: } # End firewall variable scope
135:
136: sub stop_daemon {
137: my ($daemon,$killallname)=@_;
138: my $pidfile="/home/httpd/perl/logs/$daemon.pid";
139:
140: printf("%-15s ",$daemon);
141: if (-e $pidfile) {
142: open(PIDFILE,$pidfile);
143: my $daemonpid=<PIDFILE>;
144: chomp($daemonpid);
145: kill TERM => $daemonpid;
146: my $count=0;
147: while ($count++ < 5 && kill(0 => $daemonpid)) {
148: sleep 1;
149: }
150: if (kill 0 => $daemonpid) {
151: kill KILL => $daemonpid;
152: sleep 1;
153: if (kill 0 => $daemonpid) {
154: print("failed to kill");
155: } else {
156: print("killed");
157: }
158: } else {
159: print("stopped");
160: }
161: } else {
162: print("not running");
163: }
164: system("killall -q -0 $killallname");
165: if ($? == 0) {
166: system("killall -q $killallname");
167: print(", killed off extraneous processes");
168: }
169: unlink($pidfile);
170: print("\n");
171: }
172:
173: sub clean_sockets {
174: opendir(SOCKETS,"/home/httpd/sockets/");
175: while (my $fname=readdir(SOCKETS)) {
176: next if (-d $fname
177: || $fname=~/(mysqlsock|maximasock|\Q$perlvar{'lonSockDir'}\E)/);
178: unlink("/home/httpd/sockets/$fname");
179: }
180: }
181:
182: if ($command eq "restart") {
183: print 'Restarting LON-CAPA'."\n";
184: print 'Ending LON-CAPA client and daemon processes'."\n";
185: foreach my $daemon ('lonsql','lond','lonc','lonmemcached','lonmaxima') {
186: my $killallname=$daemon;
187: if ($daemon eq 'lonc') { $killallname='loncnew'; }
188: &stop_daemon($daemon,$killallname);
189: }
190: print 'Starting LON-CAPA client and daemon processes (please be patient)'.
191: "\n";
192: system("su www -c '/home/httpd/perl/loncron --justcheckdaemons'");
193: } elsif ($command eq "stop") {
194: print 'Stopping LON-CAPA'."\n";
195: foreach my $daemon ('lonsql','lond','lonc','lonmemcached','lonmaxima') {
196: my $killallname=$daemon;
197: if ($daemon eq 'lonc') { $killallname='loncnew'; }
198: &stop_daemon($daemon,$killallname);
199: }
200: &firewall_close_port();
201: &clean_sockets();
202: } elsif ($command eq "start") {
203: &firewall_open_port();
204: print 'Starting LON-CAPA'."\n";
205: print 'Starting LON-CAPA client and daemon processes (please be patient)'.
206: "\n";
207: system("su www -c '/home/httpd/perl/loncron --justcheckdaemons'");
208: } elsif ($command eq "reload") {
209: print 'Reload LON-CAPA config files'."\n";
210: system("su www -c '/home/httpd/perl/loncron --justreload'");
211: } elsif ($command eq "status") {
212: $response=`/bin/cat /home/httpd/perl/logs/*.pid 2>&1`;
213: if ($response=~/No such file or directory/) {
214: print 'LON-CAPA is not running.'."\n";
215: } else {
216: print 'LON-CAPA is running.'."\n";
217: system("su www -c '/home/httpd/perl/loncron --justcheckconnections'");
218: }
219: if (! &firewall_is_active) {
220: print 'The iptables firewall is not active'."\n";
221: }
222: if (&firewall_is_port_open()) {
223: print 'The LON-CAPA port is open in firewall.'."\n";
224: } elsif (&firewall_is_active) {
225: print 'The LON-CAPA port is NOT open in running firewall!'."\n";
226: }
227: } else {
228: print 'You need to specify one of restart|stop|start|status on the command line.'."\n";
229: }
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