3 # freeside-selfservice-clientd
5 # This is run REMOTELY over ssh by freeside-selfservice-server
8 use subs qw(spawn logmsg lock_write unlock_write);
10 use POSIX qw(:sys_wait_h);
12 use Storable 2.09 qw(nstore_fd fd_retrieve);
13 use IO::Handle qw(_IONBF);
19 my $tag = scalar(@ARGV) ? '.'.shift : '';
21 use vars qw( $Debug );
22 $Debug = 2; #2 will turn on child logging
23 #3 will log packet contents,#including passwords
24 #4 will log receipts of all packets from server including
27 my $socket = "/usr/local/freeside/selfservice_socket$tag";
28 my $pid_file = "$socket.pid";
30 my $log_file = "/usr/local/freeside/selfservice$tag.log";
32 my $lock_file = "/usr/local/freeside/selfservice$tag.writelock";
38 $SIG{__WARN__} = \&_logmsg;
40 #read data to be cached or something
41 #warn "$me Reading init data\n" if $Debug;
44 warn "Creating $lock_file\n" if $Debug;
45 open(LOCKFILE,">$lock_file") or die "can't open $lock_file: $!";
48 warn "Creating $socket\n" if $Debug;
49 my $uaddr = sockaddr_un($socket);
50 my $proto = getprotobyname('tcp');
51 socket(Server,PF_UNIX,SOCK_STREAM,0) or die "socket: $!";
53 bind(Server, $uaddr) or die "bind: $!";
54 listen(Server,SOMAXCONN) or die "listen: $!";
57 open(PIDFILE,"<$pid_file");
58 my $old_pid = <PIDFILE>;
60 $old_pid =~ /^(\d+)$/;
63 open(PIDFILE,">$pid_file");
68 #sub REAPER { $waitedpid = wait; $SIG{CHLD} = \&REAPER; }
69 #$SIG{CHLD} = \&REAPER;
71 warn "enabling keep alives\n" if $Debug;
72 nstore_fd( { _packet => '_enable_keepalive' } , \*STDOUT );
74 warn "entering main loop\n" if $Debug;
78 my $s = new IO::Select;
82 #for ( $waitedpid = 0;
83 # accept(Client,Server) || $waitedpid;
84 # $waitedpid = 0, close Client)
88 #$SIG{PIPE} = sub { warn "SIGPIPE received" };
89 #$SIG{CHLD} = sub { warn "SIGCHLD received" };
91 #sub REAPER { warn "SIGCHLD received"; my $pid = wait; $SIG{CHLD} = \&REAPER; }
92 #sub REAPER { my $pid = wait; $SIG{CHLD} = \&REAPER; }
93 #sub REAPER { my $pid = wait; delete $kids{$pid}; $SIG{CHLD} = \&REAPER; }
94 #$SIG{CHLD} = \&REAPER;
101 warn "waiting for connection\n" if $Debug && !$undisp;
103 #my @handles = $s->can_read();
104 my @handles = $s->can_read(5);
105 $undisp = !scalar(@handles);
106 foreach my $handle ( @handles ) {
108 if ( $handle == \*STDIN ) {
110 warn "receiving packet from server\n" if $Debug > 3;
112 my $packet = fd_retrieve(\*STDIN);
113 my $token = $packet->{'_token'};
115 if ( $token eq '_keepalive' ) {
120 warn "received packet from server with token $token\n".
122 ? join('', map { " $_=>$packet->{$_}\n" } keys %$packet )
126 if ( exists($kids{$token}) ) {
127 warn "sending return packet to $token via $kids{$token}\n"
129 nstore_fd($packet, $kids{$token});
130 warn "flushing to $token\n" if $Debug;
131 until ( $kids{$token}->flush ) {
132 warn "WARNING: error flushing: $!";
135 #no close or delete here - will block waiting for child
136 warn "done with $token\n" if $Debug;
138 warn "WARNING: unknown token $token, discarding message";
141 } elsif ( $handle == \*Server ) {
143 until ( accept(Client, Server) ) {
144 warn "WARNING: accept failed: $!";
148 warn "received local connection; forking\n" if $Debug;
151 warn "[child-$$] reading packet from local client" if $Debug > 1;
152 my $packet = fd_retrieve(\*Client);
153 warn "[child-$$] packet received:\n".
154 join('', map { " $_=>$packet->{$_}\n" } keys %$packet )
156 my $command = $packet->{'command'};
157 #handle some commands weirdly?
158 $packet->{_token}=$$;
160 warn "[child-$$] locking write stream\n" if $Debug > 1;
163 warn "[child-$$] sending packet to remote server\n" if $Debug > 1;
164 nstore_fd($packet, \*STDOUT) or die "FATAL: can't send response: $!";
166 warn "[child-$$] flushing write stream\n" if $Debug > 1;
167 STDOUT->flush or die "FATAL: can't flush: $!";
169 warn "[child-$$] releasing write lock\n" if $Debug > 1;
172 warn "[child-$$] closing write stream\n" if $Debug > 1;
173 close STDOUT or die "FATAL: can't close write stream: $!"; #??!
175 warn "[child-$$] waiting for response from parent\n" if $Debug > 1;
176 my $w = new IO::Select;
178 until ( $w->can_read ) {
179 warn "[child-$$] WARNING: interrupted select: $!\n";
181 my $rv = fd_retrieve(\*STDIN);
185 warn "[child-$$] sending response to local client" if $Debug > 1;
186 nstore_fd($rv, \*Client);
187 Client->flush or die "FATAL: can't flush to local client: $!";
188 close Client or die "FATAL: can't close connection to local client: $!";
190 warn "[child-$$] child exiting" if $Debug > 1;
206 #warn "reaping kids\n";
207 foreach my $pid ( keys %kids ) {
208 my $kid = waitpid($pid, WNOHANG);
214 #warn "done reaping\n";
220 unless (@_ == 0 && $coderef && ref($coderef) eq 'CODE') {
222 confess "usage: spawn CODEREF";
226 #if (!defined($pid = fork)) {
227 my $kid = new IO::Handle;
228 if (!defined($pid = open($kid, '|-'))) {
229 warn "WARNING: cannot fork: $!";
232 warn "begat $pid" if $Debug;
234 #$kids{$pid}->autoflush;
235 return; # I'm the parent
237 # else I'm the child -- go spawn
239 # open(STDIN, "<&Client") || die "can't dup client to stdin";
240 # open(STDOUT, ">&Client") || die "can't dup client to stdout";
241 # open(STDERR, ">&STDOUT") || die "can't dup stdout to stderr";
246 chomp( my $msg = shift );
247 my $log = new IO::File ">>$log_file";
248 die "can't open $log_file: $!" unless defined($log);
249 flock($log, LOCK_EX);
251 print $log "[client] [". scalar(localtime). "] [$$] $msg\n";
252 flock($log, LOCK_UN);
258 #flock(STDOUT, LOCK_EX) or die "FATAL: can't lock write stream: $!";
260 #open a new one for each kid to get a unique lock
261 open(LOCKFILE,">$lock_file") or die "can't open $lock_file: $!";
263 flock(LOCKFILE, LOCK_EX) or die "FATAL: can't lock $lock_file: $!";
268 #flock(STDOUT, LOCK_UN) or die "FATAL: can't release write lock: $!";
270 flock(LOCKFILE, LOCK_UN) or die "FATAL: can't unlock $lock_file: $!";