-# Copyright (C) 2015-2020 all contributors <meta@public-inbox.org>
+# Copyright (C) 2015-2021 all contributors <meta@public-inbox.org>
# License: AGPL-3.0+ <https://www.gnu.org/licenses/agpl-3.0.txt>
-# contains common daemon code for the httpd, imapd, and nntpd servers.
-# This may be used for read-only IMAP server if we decide to implement it.
+#
+# Contains common daemon code for the httpd, imapd, and nntpd servers
+# and designed for handling thousands of untrusted clients over slow
+# and/or lossy connections.
package PublicInbox::Daemon;
use strict;
use warnings;
use IO::Socket;
use POSIX qw(WNOHANG :signal_h);
use Socket qw(IPPROTO_TCP SOL_SOCKET);
-sub SO_ACCEPTFILTER () { 0x1000 }
-use Cwd qw/abs_path/;
STDOUT->autoflush(1);
STDERR->autoflush(1);
use PublicInbox::DS qw(now);
-use PublicInbox::Syscall qw($SFD_NONBLOCK);
+use PublicInbox::Syscall qw(SFD_NONBLOCK);
require PublicInbox::Listener;
use PublicInbox::EOFpipe;
use PublicInbox::Sigfd;
+use PublicInbox::GitAsyncCat;
+our $SO_ACCEPTFILTER = 0x1000;
my @CMD;
my ($set_user, $oldset);
my (@cfg_listen, $stdout, $stderr, $group, $user, $pid_file, $daemonize);
sub daemon_prepare ($) {
my ($default_listen) = @_;
my $listener_names = {}; # sockname => IO::Handle
- $oldset = PublicInbox::Sigfd::block_signals();
+ $oldset = PublicInbox::DS::block_signals();
@CMD = ($0, @ARGV);
my ($prog) = ($CMD[0] =~ m!([^/]+)\z!g);
my $help = <<EOF;
sub daemonize () {
if ($daemonize) {
+ require Cwd;
foreach my $i (0..$#ARGV) {
my $arg = $ARGV[$i];
next unless -e $arg;
- $ARGV[$i] = abs_path($arg);
+ $ARGV[$i] = Cwd::abs_path($arg);
}
check_absolute('stdout', $stdout);
check_absolute('stderr', $stderr);
chdir '/' or die "chdir failed: $!";
}
-
- return unless (defined $pid_file || defined $group || defined $user
- || $daemonize);
-
- eval { require Net::Server::Daemonize };
- if ($@) {
- die
-"Net::Server required for --pid-file, --group, --user, and --daemonize\n$@\n";
+ if (defined($pid_file) || defined($group) || defined($user)) {
+ eval { require Net::Server::Daemonize; 1 } // die <<EOF;
+Net::Server required for --pid-file, --group, --user
+$@
+EOF
}
-
Net::Server::Daemonize::check_pid_file($pid_file) if defined $pid_file;
$uid = Net::Server::Daemonize::get_uid($user) if defined $user;
if (defined $group) {
};
if ($daemonize) {
- my $pid = fork;
- die "could not fork: $!\n" unless defined $pid;
+ my $pid = fork // die "fork: $!";
exit if $pid;
open(STDIN, '+<', '/dev/null') or
open STDOUT, '>&STDIN' or die "redirect stdout failed: $!\n";
open STDERR, '>&STDIN' or die "redirect stderr failed: $!\n";
POSIX::setsid();
- $pid = fork;
- die "could not fork: $!\n" unless defined $pid;
+ $pid = fork // die "fork: $!";
exit if $pid;
}
return unless defined $pid_file;
my $end = $fds + 2; # LISTEN_FDS_START - 1
my @rv = ();
foreach my $fd (3..$end) {
- my $s = IO::Handle->new_from_fd($fd, 'r');
+ open(my $s, '<&=', $fd) or warn "fdopen fd=$fd: $!";
if (my $k = sockname($s)) {
- if ($s->blocking) {
- $s->blocking(0);
- warn <<"";
+ my $prev_was_blocking = $s->blocking(0);
+ warn <<"" if $prev_was_blocking;
Inherited socket (fd=$fd) is blocking, making it non-blocking.
Set 'NonBlocking = true' in the systemd.service unit to avoid stalled
processes when multiple service instances start.
- }
$listener_names->{$k} = $s;
push @rv, $s;
} else {
}
sub kill_workers ($) {
- my ($s) = @_;
-
- while (my ($pid, $id) = each %pids) {
- kill $s, $pid;
- }
+ my ($sig) = @_;
+ kill $sig, keys(%pids);
}
sub upgrade_aborted ($) {
CHLD => \&reap_children,
};
my $sigfd = PublicInbox::Sigfd->new($sig, 0);
- local %SIG = (%SIG, %$sig) if !$sigfd;
- PublicInbox::Sigfd::sig_setmask($oldset) if !$sigfd;
+ local @SIG{keys %$sig} = values(%$sig) unless $sigfd;
+ PublicInbox::DS::sig_setmask($oldset) if !$sigfd;
while (1) { # main loop
my $n = scalar keys %pids;
unless (@listeners) {
}
my $want = $worker_processes - 1;
if ($n <= $want) {
- PublicInbox::Sigfd::block_signals() if !$sigfd;
+ PublicInbox::DS::block_signals() if !$sigfd;
for my $i ($n..$want) {
+ my $seed = rand(0xffffffff);
my $pid = fork;
if (!defined $pid) {
warn "failed to fork worker[$i]: $!\n";
} elsif ($pid == 0) {
+ srand($seed);
+ eval { Net::SSLeay::randomize() };
$set_user->() if $set_user;
return $p0; # run normal work code
} else {
$pids{$pid} = $i;
}
}
- PublicInbox::Sigfd::sig_setmask($oldset) if !$sigfd;
+ PublicInbox::DS::sig_setmask($oldset) if !$sigfd;
}
if ($sigfd) { # Linux and IO::KQueue users:
return if $sec > 0; # systemd users may set a higher value
setsockopt($s, IPPROTO_TCP, $TCP_DEFER_ACCEPT, 1);
} elsif ($^O eq 'freebsd') {
- my $x = getsockopt($s, SOL_SOCKET, SO_ACCEPTFILTER);
+ my $x = getsockopt($s, SOL_SOCKET, $SO_ACCEPTFILTER);
return if defined $x; # don't change if set
my $accf_arg = pack('a16a240', $af_name, '');
- setsockopt($s, SOL_SOCKET, SO_ACCEPTFILTER, $accf_arg);
+ setsockopt($s, SOL_SOCKET, $SO_ACCEPTFILTER, $accf_arg);
}
}
# this calls epoll_create:
PublicInbox::Listener->new($_, $tls_cb || $post_accept)
} @listeners;
- my $sigfd = PublicInbox::Sigfd->new($sig, $SFD_NONBLOCK);
- local %SIG = (%SIG, %$sig) if !$sigfd;
+ my $sigfd = PublicInbox::Sigfd->new($sig, SFD_NONBLOCK);
+ local @SIG{keys %$sig} = values(%$sig) unless $sigfd;
if (!$sigfd) {
# wake up every second to accept signals if we don't
# have signalfd or IO::KQueue:
- PublicInbox::Sigfd::sig_setmask($oldset);
+ PublicInbox::DS::sig_setmask($oldset);
PublicInbox::DS->SetLoopTimeout(1000);
}
PublicInbox::DS->EventLoop;
daemon_prepare($default);
my $af_default = $default =~ /:8080\z/ ? 'httpready' : undef;
my $for_destroy = daemonize();
+
+ # localize GCF2C for tests:
+ local $PublicInbox::GitAsyncCat::GCF2C;
+
daemon_loop($refresh, $post_accept, $tlsd, $af_default);
PublicInbox::DS->Reset;
# ->DESTROY runs when $for_destroy goes out-of-scope