3 # freeside-selfservice-server
5 # alas, much false laziness with freeside-queued and fs_signup_server. at
6 # least it is slated to replace fs_{signup,passwd,mailadmin}_server
7 # should probably generalize the version in here, or better yet use
8 # Proc::Daemon or somesuch
11 use vars qw( $Debug %kids $kids $max_kids $shutdown $log_file $ssh_pid );
12 use subs qw( lock_write unlock_write );
14 use POSIX qw(:sys_wait_h setsid);
18 use Storable qw(nstore_fd fd_retrieve);
19 use Net::SSH qw(sshopen2);
20 use FS::UID qw(adminsuidsetup forksuidsetup);
27 $Debug = 2; # >= 2 will log packet contents, including potentially compromising
34 my $user = shift or die &usage;
35 my $machine = shift or die &usage;
36 my $tag = scalar(@ARGV) ? shift : '';
37 my $pid_file = "/var/run/freeside-selfservice-server.$user.pid";
38 #my $pid_file = "/var/run/freeside-selfservice-server.$user.pid"; $FS::UID::datasrc not posible, but should include machine name at least, hmm
40 my $lock_file = "/usr/local/etc/freeside/selfservice.$machine.writelock";
41 open(LOCKFILE,">$lock_file") or die "can't open $lock_file: $!";
45 my $conf = new FS::Conf;
47 my $clientd = "/usr/local/sbin/freeside-selfservice-clientd"; #better name?
51 my($writer,$reader,$error) = (new IO::Handle, new IO::Handle, new IO::Handle);
52 warn "connecting to $machine\n" if $Debug;
54 $ssh_pid = sshopen2($machine,$reader,$writer,$clientd,$tag);
56 # nstore_fd(\*writer, {'hi'=>'there'});
58 warn "entering main loop\n" if $Debug;
60 my $s = IO::Select->new( $reader );
65 warn "waiting for packet from client\n" if $Debug && !$undisp;
67 my @handles = $s->can_read(5);
69 &shutdown if $shutdown;
75 warn "receiving packet from client\n" if $Debug;
77 my $packet = eval { fd_retrieve($reader); };
79 warn "Storable error receiving packet from client".
80 " (assuming lost connection): $@\n"
83 warn "sending TERM signal to ssh process $ssh_pid\n" if $Debug;
84 kill 'TERM', $ssh_pid;
89 warn "packet received\n".
90 join('', map { " $_=>$packet->{$_}\n" } keys %$packet )
93 #prevent runaway forking
95 while ( $kids >= $max_kids ) {
96 warn "WARNING: maximum $kids children reached\n" unless $warnkids++;
101 warn "forking child\n" if $Debug;
102 defined( my $pid = fork ) or die "can't fork: $!";
106 warn "child $pid spawned\n" if $Debug;
110 $FS::UID::dbh->{InactiveDestroy} = 1;
111 forksuidsetup($user);
113 my $type = $packet->{_packet};
114 warn "calling $type handler\n" if $Debug;
115 my $rv = eval { FS::ClientAPI->dispatch($type, $packet); };
117 warn my $error = "WARNING: error dispatching $type: $@";
118 $rv = { _error => $error };
120 $rv->{_token} = $packet->{_token}; #identifier
122 warn "sending response\n" if $Debug;
124 nstore_fd($rv, $writer) or die "FATAL: can't send response: $!";
125 $writer->flush or die "FATAL: can't flush: $!";
128 warn "child exiting\n" if $Debug;
134 warn "connection lost, reconnecting\n" if $Debug;
140 # utility subroutines
144 #warn "reaping kids\n";
145 foreach my $pid ( keys %kids ) {
146 my $kid = waitpid($pid, WNOHANG);
152 #warn "done reaping\n";
158 chdir "/" or die "Can't chdir to /: $!";
159 open STDIN, '/dev/null' or die "Can't read /dev/null: $!";
160 defined(my $pid = fork) or die "Can't fork: $!";
162 print "freeside-selfservice-server to $machine started with pid $pid\n"; #logging to $log_file
163 exit unless $pid_file;
164 my $pidfh = new IO::File ">$pid_file" or exit;
165 print $pidfh "$pid\n";
169 # sub REAPER { my $pid = wait; $SIG{CHLD} = \&REAPER; $kids--; }
170 # #sub REAPER { my $pid = wait; $kids--; $SIG{CHLD} = \&REAPER; }
171 # $SIG{CHLD} = \&REAPER;
174 $SIG{HUP} = sub { warn "SIGHUP received; shutting down\n"; $shutdown++; };
175 $SIG{INT} = sub { warn "SIGINT received; shutting down\n"; $shutdown++; };
176 $SIG{TERM} = sub { warn "SIGTERM received; shutting down\n"; $shutdown++; };
177 $SIG{QUIT} = sub { warn "SIGQUIT received; shutting down\n"; $shutdown++; };
178 $SIG{PIPE} = sub { warn "SIGPIPE received; shutting down\n"; $shutdown++; };
180 #false laziness w/freeside-queued
181 my $freeside_gid = scalar(getgrnam('freeside'))
182 or die "can't setgid to freeside group\n";
185 #if freebsd can't setuid(), presumably it can't setgid() either. grr fleabsd
189 $> = $FS::UID::freeside_uid;
190 $< = $FS::UID::freeside_uid;
191 #freebsd is sofa king broken, won't setuid()
193 $> = $FS::UID::freeside_uid;
196 $ENV{HOME} = (getpwuid($>))[7]; #for ssh
197 adminsuidsetup $user;
199 #$log_file = "/usr/local/etc/freeside/selfservice.". $FS::UID::datasrc; #MACHINE NAME
200 $log_file = "/usr/local/etc/freeside/selfservice.$machine.log";
202 open STDOUT, '>/dev/null'
203 or die "Can't write to /dev/null: $!";
204 setsid or die "Can't start a new session: $!";
205 open STDERR, '>&STDOUT' or die "Can't dup stdout: $!";
207 $SIG{__DIE__} = \&_die;
208 $SIG{__WARN__} = \&_logmsg;
210 warn "freeside-selfservice-server starting\n";
215 my $wait = 12; #wait up to 1 minute
216 while ( $kids > 0 && $wait-- ) {
217 warn "waiting for $kids children to terminate";
220 warn "abandoning $kids children" if $kids;
221 kill 'TERM', $ssh_pid if $ssh_pid;
227 unlink $pid_file if -e $pid_file;
232 chomp( my $msg = shift );
233 _do_logmsg( "[server] [". scalar(localtime). "] [$$] $msg\n" );
237 chomp( my $msg = shift );
238 my $log = new IO::File ">>$log_file";
239 flock($log, LOCK_EX);
242 flock($log, LOCK_UN);
248 #flock($writer, LOCK_EX) or die "FATAL: can't lock write stream: $!";
250 flock(LOCKFILE, LOCK_EX) or die "FATAL: can't lock $lock_file: $!";
256 #flock($writer, LOCK_UN) or die "WARNING: can't release write lock: $!";
258 flock(LOCKFILE, LOCK_UN) or die "FATAL: can't unlock $lock_file: $!";
263 die "Usage:\n\n freeside-selfservice-server user machine\n";