X-Git-Url: http://www.git.stargrave.org/?a=blobdiff_plain;f=lib%2FPublicInbox%2FDaemon.pm;h=727311a4aa10eb8d97612022869f3ce9f2e15c5b;hb=e901a56b3b30b22f16bc9c6460150b2b402b4ee7;hp=155707e1df49c4d0c17dd61551f19acc0538e2c5;hpb=8ba04f214bbadcbe106c94281a0c4c21dd50adb8;p=public-inbox.git

diff --git a/lib/PublicInbox/Daemon.pm b/lib/PublicInbox/Daemon.pm
index 155707e1..727311a4 100644
--- a/lib/PublicInbox/Daemon.pm
+++ b/lib/PublicInbox/Daemon.pm
@@ -1,7 +1,9 @@
-# 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;
@@ -11,11 +13,10 @@ 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($SFD_NONBLOCK);
+use PublicInbox::Syscall qw(SFD_NONBLOCK);
 require PublicInbox::Listener;
 use PublicInbox::EOFpipe;
 use PublicInbox::Sigfd;
@@ -76,7 +77,7 @@ sub accept_tls_opt ($) {
 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;
@@ -202,10 +203,11 @@ sub check_absolute ($$) {
 
 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);
@@ -213,16 +215,12 @@ sub daemonize () {
 
 		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) {
@@ -241,8 +239,7 @@ sub daemonize () {
 	};
 
 	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
@@ -250,8 +247,7 @@ sub daemonize () {
 		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 $pid_file;
@@ -371,16 +367,14 @@ sub inherit ($) {
 	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 {
@@ -427,11 +421,8 @@ sub upgrade { # $_[0] = signal name or number (unused)
 }
 
 sub kill_workers ($) {
-	my ($s) = @_;
-
-	while (my ($pid, $id) = each %pids) {
-		kill $s, $pid;
-	}
+	my ($sig) = @_;
+	kill $sig, keys(%pids);
 }
 
 sub upgrade_aborted ($) {
@@ -523,8 +514,8 @@ EOF
 		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) {
@@ -540,12 +531,15 @@ EOF
 		}
 		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 {
@@ -553,7 +547,7 @@ EOF
 					$pids{$pid} = $i;
 				}
 			}
-			PublicInbox::Sigfd::sig_setmask($oldset) if !$sigfd;
+			PublicInbox::DS::sig_setmask($oldset) if !$sigfd;
 		}
 
 		if ($sigfd) { # Linux and IO::KQueue users:
@@ -636,12 +630,12 @@ sub daemon_loop ($$$$) {
 		# 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;