2 # Copyright (C) 2015 all contributors <meta@public-inbox.org>
3 # License: AGPLv3 or later (https://www.gnu.org/licenses/agpl-3.0.txt)
9 use Getopt::Long qw/:config gnu_getopt no_ignore_case auto_abbrev/;
10 require PublicInbox::NewsGroup;
11 my $nntpd = PublicInbox::NNTPD->new;
12 my $refresh = sub { $nntpd->refresh_groups };
13 $SIG{HUP} = $SIG{USR1} = $SIG{USR2} = $SIG{PIPE} =
14 $SIG{TTIN} = $SIG{TTOU} = $SIG{WINCH} = 'IGNORE';
17 my (@cfg_listen, $stdout, $stderr);
18 my $worker_processes = 0;
20 'l|listen=s' => \@cfg_listen,
21 '1|stdout=s' => \$stdout,
22 '2|stderr=s' => \$stderr,
23 'W|worker-processes=i' => \$worker_processes,
25 GetOptions(%opts) or die "bad command-line args\n";
29 my @listeners = inherit();
31 # default NNTP listener if no listeners
32 push @cfg_listen, '0.0.0.0:119' unless (@listeners || @cfg_listen);
34 foreach my $l (@cfg_listen) {
35 next if $listener_names{$l}; # already inherited
36 require IO::Socket::INET6; # works for IPv4, too
42 if (my $s = IO::Socket::INET6->new(%o)) {
43 $listener_names{sockname($s)} = $s;
46 warn "error binding $l: $!\n";
49 die 'No listeners bound' unless @listeners;
50 open(STDIN, '+<', '/dev/null');
52 if ($worker_processes > 0) {
53 # my ($p0, $p1, $r, $w);
54 pipe(my ($p0, $p1)) or die "failed to create parent-pipe: $!\n";
55 my %pwatch = ( fileno($p0) => sub { kill('TERM', $$) } );
56 pipe(my ($r, $w)) or die "failed to create self-pipe: $!\n";
57 IO::Handle::blocking($w, 0);
58 my $set_workers = $worker_processes;
61 foreach my $s (qw(HUP CHLD QUIT INT TERM USR1 USR2 TTIN TTOU WINCH)) {
63 return if $$ != $master_pid;
71 while (my $s = shift @caught) {
75 } elsif ($s eq 'USR2') {
77 } elsif ($s =~ /\A(?:QUIT|TERM|INT)\z/) {
78 # drops pipes and causes children to die
80 } elsif ($s eq 'WINCH') {
81 $worker_processes = 0;
82 } elsif ($s eq 'HUP') {
83 $worker_processes = $set_workers;
86 } elsif ($s eq 'TTIN') {
87 if ($set_workers > $worker_processes) {
90 $worker_processes = ++$set_workers;
92 } elsif ($s eq 'TTOU') {
93 if ($set_workers > 0) {
94 $worker_processes = --$set_workers;
96 } elsif ($s eq 'CHLD') {
101 my $n = scalar keys %pids;
102 if ($n > $worker_processes) {
103 while (my ($k, $v) = each %pids) {
104 kill('TERM', $k) if $v >= $worker_processes;
106 $n = $worker_processes;
108 foreach my $i ($n..($worker_processes - 1)) {
109 my ($pid, $err) = do_fork();
111 warn "failed to fork worker[$i]: $err\n";
112 } elsif ($pid == 0) {
113 close($_) for ($w, $r, $p1);
114 Danga::Socket->AddOtherFds(%pwatch);
117 warn "PID=$pid is worker[$i]\n";
121 sysread($r, my $buf, 8);
125 # this calls epoll_create:
126 @listeners = map { PublicInbox::Listener->new($_) } @listeners;
128 $SIG{QUIT} = $SIG{INT} = $SIG{TERM} = *worker_quit;
129 $SIG{USR1} = *reopen_logs;
130 $SIG{HUP} = $refresh;
131 $_->watch_read(1) for @listeners;
132 Danga::Socket->EventLoop;
138 # killing again terminates immediately:
139 exit unless @listeners;
141 $_->close for @listeners;
144 # drop idle connections and try to quit gracefully
145 Danga::Socket->SetPostLoopCallback(sub {
146 my ($dmap, undef) = @_;
148 foreach my $s (values %$dmap) {
149 if ($s->{write_buf_size} || @{$s->{read_push_back}}) {
155 $n; # true: loop continues, false: loop breaks
161 open STDOUT, '>>', $stdout or
162 warn "failed to redirect stdout to $stdout: $!\n";
165 open STDERR, '>>', $stderr or
166 warn "failed to redirect stderr to $stderr: $!\n";
172 my $n = getsockname($s) or return;
174 if (bytes::length($n) >= 28) {
176 ($port, $addr) = Socket6::unpack_sockaddr_in6($n);
178 ($port, $addr) = Socket::sockaddr_in($n);
180 if (bytes::length($addr) == 4) {
181 $n = Socket::inet_ntoa($addr)
183 $n = '['.Socket6::inet_ntop(Socket6::AF_INET6(), $addr).']';
189 return () if ($ENV{LISTEN_PID} || 0) != $$;
190 my $fds = $ENV{LISTEN_FDS} or return ();
191 my $end = $fds + 2; # LISTEN_FDS_START - 1
193 foreach my $fd (3..$end) {
194 my $s = IO::Handle->new;
195 $s->fdopen($fd, 'r');
196 if (my $k = sockname($s)) {
197 $listener_names{$k} = $s;
200 warn "failed to inherit fd=$fd (LISTEN_FDS=$fds)";
208 warn "upgrade in-progress: $reexec_pid\n";
211 my ($pid, $err) = do_fork();
212 unless (defined $pid) {
213 warn "fork failed: $err\n";
217 use Fcntl qw(FD_CLOEXEC F_SETFD F_GETFD);
218 $ENV{LISTEN_FDS} = scalar @listeners;
219 $ENV{LISTEN_PID} = $$;
220 foreach my $s (@listeners) {
221 my $fl = fcntl($s, F_GETFD, 0);
222 fcntl($s, F_SETFD, $fl &= ~FD_CLOEXEC);
225 die "Failed to exec: $!\n";
233 while (my ($pid, $id) = each %pids) {
240 my $new = POSIX::SigSet->new;
242 my $old = POSIX::SigSet->new;
243 POSIX::sigprocmask(&POSIX::SIG_BLOCK, $new, $old) or
244 die "SIG_BLOCK: $!\n";
247 POSIX::sigprocmask(&POSIX::SIG_SETMASK, $old) or
248 die "SIG_SETMASK: $!\n";
254 my $p = waitpid(-1, &POSIX::WNOHANG) or return;
255 if (defined $reexec_pid && $p == $reexec_pid) {
257 warn "reexec PID($p) died with: $?\n";
258 } elsif (defined(my $id = delete $pids{$p})) {
259 warn "worker[$id] PID($p) died with: $?\n";
261 warn "unknown PID($p) reaped: $?\n";
269 package PublicInbox::Listener;
272 use base 'Danga::Socket';
273 use Socket qw(SOL_SOCKET SO_KEEPALIVE IPPROTO_TCP TCP_NODELAY);
274 use PublicInbox::NNTP;
277 my ($class, $s) = @_;
278 setsockopt($s, SOL_SOCKET, SO_KEEPALIVE, 1);
279 setsockopt($s, IPPROTO_TCP, TCP_NODELAY, 1);
281 IO::Handle::blocking($s, 0);
282 my $self = fields::new($class);
283 $self->SUPER::new($s);
288 # no loop here, we want to fairly distribute clients
289 # between multiple processes sharing the same socket
290 if (accept(my $c, $self->{sock})) {
291 IO::Handle::blocking($c, 0); # no accept4 :<
292 PublicInbox::NNTP->new($c, $nntpd);
297 package PublicInbox::NNTPD;
300 use fields qw(groups err out);
304 my $self = fields::new($class);
305 $self->{groups} = {};
306 $self->{err} = \*STDERR;
307 $self->{out} = \*STDOUT;
313 require PublicInbox::Config;
314 my $pi_config = PublicInbox::Config->new;
316 foreach my $k (keys %$pi_config) {
317 $k =~ /\Apublicinbox\.([^\.]+)\.mainrepo\z/ or next;
319 my $git_dir = $pi_config->{$k};
320 my $address = $pi_config->{"publicinbox.$g.address"};
321 my $ng = PublicInbox::NewsGroup->new($g, $git_dir, $address);
322 my $old_ng = $self->{groups}->{$g};
324 # Reuse the old one if possible since it can hold references
325 # to valid mm and gcf objects
327 $old_ng->update($ng);
331 # Only valid if Msgmap works
332 $new->{$g} = $ng if $ng->mm(1);
334 # this will destroy old groups that got deleted
335 %{$self->{groups}} = %$new;