require IO::Handle;
use Getopt::Long qw/:config gnu_getopt no_ignore_case auto_abbrev/;
require PublicInbox::NewsGroup;
+my $set_user;
my $nntpd = PublicInbox::NNTPD->new;
my $refresh = sub { $nntpd->refresh_groups };
$SIG{HUP} = $SIG{USR1} = $SIG{USR2} = $SIG{PIPE} =
$SIG{TTIN} = $SIG{TTOU} = $SIG{WINCH} = 'IGNORE';
$refresh->();
-my (@cfg_listen, $stdout, $stderr);
+my (@cfg_listen, $stdout, $stderr, $group, $user, $pid_file, $daemonize);
my $worker_processes = 0;
my %opts = (
'l|listen=s' => \@cfg_listen,
'1|stdout=s' => \$stdout,
'2|stderr=s' => \$stderr,
'W|worker-processes=i' => \$worker_processes,
+ 'P|pid-file=s' => \$pid_file,
+ 'u|user=s' => \$user,
+ 'g|group=s' => \$group,
+ 'D|daemonize' => \$daemonize,
);
GetOptions(%opts) or die "bad command-line args\n";
+
+if (defined $pid_file && $pid_file =~ /\.oldbin\z/) {
+ die "--pid-file cannot end with '.oldbin'\n";
+}
+
my %pids;
my %listener_names;
my $reexec_pid;
my @listeners = inherit();
+# ignore daemonize when inheriting
+$daemonize = undef if scalar @listeners;
+
# default NNTP listener if no listeners
push @cfg_listen, '0.0.0.0:119' unless (@listeners || @cfg_listen);
}
}
die 'No listeners bound' unless @listeners;
-open(STDIN, '+<', '/dev/null');
+
+chdir '/' or die "chdir failed: $!\n";
+open(STDIN, '+<', '/dev/null') or die "redirect stdin failed: $!\n";
+
+if (defined $pid_file || defined $group || defined $user || $daemonize) {
+ require Net::Server::Daemonize;
+
+ Net::Server::Daemonize::check_pid_file($pid_file) if defined $pid_file;
+ my $uid = Net::Server::Daemonize::get_uid($user) if defined $user;
+ my $gid;
+ if (defined $group) {
+ $gid = Net::Server::Daemonize::get_gid($group);
+ $gid = (split /\s+/, $gid)[0];
+ } elsif (defined $uid) {
+ $gid = (getpwuid($uid))[3];
+ }
+
+ # We change users in the worker to ensure upgradability,
+ # The upgrade will create the ".oldbin" pid file in the
+ # same directory as the given pid file.
+ $uid and $set_user = sub {
+ Net::Server::Daemonize::set_user($uid, $gid);
+ };
+
+ if ($daemonize) {
+ my ($pid, $err) = do_fork();
+ die "could not fork: $err\n" unless defined $pid;
+ exit if $pid;
+
+ open STDOUT, '>&STDIN' or die "redirect stdout failed: $!\n";
+ open STDERR, '>&STDIN' or die "redirect stderr failed: $!\n";
+ POSIX::setsid();
+ ($pid, $err) = do_fork();
+ die "could not fork: $err\n" unless defined $pid;
+ exit if $pid;
+ }
+ if (defined $pid_file) {
+ my $unlink_pid = $$;
+ Net::Server::Daemonize::create_pid_file($pid_file);
+ END { unlink_pid_file_safe_ish($unlink_pid, $pid_file) };
+ }
+}
if ($worker_processes > 0) {
- # my ($p0, $p1, $r, $w);
pipe(my ($p0, $p1)) or die "failed to create parent-pipe: $!\n";
my %pwatch = ( fileno($p0) => sub { kill('TERM', $$) } );
pipe(my ($r, $w)) or die "failed to create self-pipe: $!\n";
if (!defined $pid) {
warn "failed to fork worker[$i]: $err\n";
} elsif ($pid == 0) {
+ $set_user->() if $set_user;
close($_) for ($w, $r, $p1);
Danga::Socket->AddOtherFds(%pwatch);
goto worker;
warn "upgrade in-progress: $reexec_pid\n";
return;
}
+ if (defined $pid_file) {
+ if ($pid_file =~ /\.oldbin\z/) {
+ warn "BUG: .oldbin suffix exists: $pid_file\n";
+ return;
+ }
+ unlink_pid_file_safe_ish($$, $pid_file);
+ $pid_file .= '.oldbin';
+ Net::Server::Daemonize::create_pid_file($pid_file);
+ }
my ($pid, $err) = do_fork();
unless (defined $pid) {
warn "fork failed: $err\n";
($pid, $err);
}
+sub upgrade_aborted ($) {
+ my ($p) = @_;
+ warn "reexec PID($p) died with: $?\n";
+ $reexec_pid = undef;
+ return unless $pid_file;
+
+ my $file = $pid_file;
+ $file =~ s/\.oldbin\z// or die "BUG: no '.oldbin' suffix in $file\n";
+ unlink_pid_file_safe_ish($$, $pid_file);
+ $pid_file = $file;
+ eval { Net::Server::Daemonize::create_pid_file($pid_file) };
+ warn $@, "\n" if $@;
+}
+
sub reap_children {
while (1) {
my $p = waitpid(-1, &POSIX::WNOHANG) or return;
if (defined $reexec_pid && $p == $reexec_pid) {
- $reexec_pid = undef;
- warn "reexec PID($p) died with: $?\n";
+ upgrade_aborted($p);
} elsif (defined(my $id = delete $pids{$p})) {
warn "worker[$id] PID($p) died with: $?\n";
} elsif ($p > 0) {
}
}
+sub unlink_pid_file_safe_ish ($$) {
+ my ($unlink_pid, $file) = @_;
+ return unless defined $unlink_pid && $unlink_pid == $$;
+
+ open my $fh, '<', $file or return;
+ defined(my $read_pid = <$fh>) or return;
+ chomp $read_pid;
+ if ($read_pid == $unlink_pid) {
+ Net::Server::Daemonize::unlink_pid_file($file);
+ }
+}
+
1;
package PublicInbox::Listener;
use strict;