+my $finish_workers = sub {
+ my ($self) = @_;
+
+ foreach my $id (qw(workers old_workers)) {
+ foreach my $cpid (keys %{$self->{$id}}) {
+ my $waitpid = waitpid($cpid, WNOHANG);
+ if (defined($waitpid) && ($waitpid == $cpid)) {
+ delete ($self->{$id}->{$cpid});
+ syslog('info', "worker $cpid finished");
+ }
+ }
+ }
+};
+
+my $start_workers = sub {
+ my ($self) = @_;
+
+ return if $self->{terminate};
+
+ my $count = 0;
+ foreach my $cpid (keys %{$self->{workers}}) {
+ $count++;
+ }
+
+ my $need = $self->{max_workers} - $count;
+
+ return if $need <= 0;
+
+ syslog('info', "starting $need worker(s)");
+
+ while ($need > 0) {
+ my $pid = fork;
+
+ if (!defined ($pid)) {
+ syslog('err', "can't fork worker");
+ sleep (1);
+ } elsif ($pid) { # parent
+ $self->{workers}->{$pid} = 1;
+ syslog('info', "worker $pid started");
+ $need--;
+ } else {
+ $0 = "$self->{name} worker";
+
+ $self->after_fork_cleanup();
+
+ eval { $self->run(); };
+ if (my $err = $@) {
+ syslog('err', $err);
+ sleep(5); # avoid fast restarts
+ }
+
+ syslog('info', "worker exit");
+ exit (0);
+ }
+ }
+};
+
+my $terminate_server = sub {
+ my ($self) = @_;
+
+ $self->{terminate} = 1; # set flag to avoid worker restart
+
+ if (!$self->{max_workers}) {
+ eval { $self->shutdown(); };
+ warn $@ if $@;
+ return;
+ }
+
+ eval { $self->shutdown(); };
+ warn $@ if $@;
+
+ # we have workers - send TERM signal
+
+ foreach my $cpid (keys %{$self->{workers}}) {
+ kill(15, $cpid); # TERM childs
+ }
+
+ # if configured, leave children running on HUP
+ return if $self->{got_hup_signal} &&
+ $self->{leave_children_open_on_reload};
+
+ # else, send TERM to old workers
+ foreach my $cpid (keys %{$self->{old_workers}}) {
+ kill(15, $cpid); # TERM childs
+ }
+
+ # nicely shutdown childs (give them max 10 seconds to shut down)
+ my $previous_alarm = alarm(10);
+ eval {
+ local $SIG{ALRM} = sub { die "timeout\n" };
+
+ while ((my $pid = waitpid (-1, 0)) > 0) {
+ foreach my $id (qw(workers old_workers)) {
+ if (defined($self->{$id}->{$pid})) {
+ delete($self->{$id}->{$pid});
+ syslog('info', "worker $pid finished");
+ }
+ }
+ }
+ alarm(0); # avoid race condition
+ };
+ my $err = $@;
+
+ alarm ($previous_alarm);
+
+ if ($err) {
+ syslog('err', "error stopping workers (will kill them now) - $err");
+ foreach my $id (qw(workers old_workers)) {
+ foreach my $cpid (keys %{$self->{$id}}) {
+ # KILL childs still alive!
+ if (kill (0, $cpid)) {
+ delete($self->{$id}->{$cpid});
+ syslog("err", "kill worker $cpid");
+ kill(9, $cpid);
+ # fixme: waitpid?
+ }
+ }
+ }
+ }
+};
+