-# Copyright (C) 2016-2019 all contributors <meta@public-inbox.org>
+#!perl -w
+# Copyright (C) all contributors <meta@public-inbox.org>
# License: AGPL-3.0+ <https://www.gnu.org/licenses/agpl-3.0.txt>
# Tests for binding Unix domain sockets
use strict;
-use warnings;
use Test::More;
use PublicInbox::TestCommon;
use Errno qw(EADDRINUSE);
-
-foreach my $mod (qw(Plack::Util Plack::Builder HTTP::Date HTTP::Status)) {
- eval "require $mod";
- plan skip_all => "$mod missing for httpd-unix.t" if $@;
-}
-
+use Cwd qw(abs_path);
+use Carp qw(croak);
+use Fcntl qw(FD_CLOEXEC F_SETFD);
+require_mods(qw(Plack::Util Plack::Builder HTTP::Date HTTP::Status));
use IO::Socket::UNIX;
+use POSIX qw(mkfifo);
my ($tmpdir, $for_destroy) = tmpdir();
my $unix = "$tmpdir/unix.sock";
my $psgi = './t/httpd-corner.psgi';
my $err = "$tmpdir/err.log";
my $td;
+my $register_exit_fifo = sub {
+ my ($s, $f) = @_;
+ my $sock = new_sock($s);
+ ok($sock->write("GET /exit-fifo$f HTTP/1.0\r\n\r\n"),
+ 'request exit-fifo');
+ ok($sock->read(my $buf, 4096), 'read exit-fifo response');
+ like($buf, qr!\r\n\r\nfifo \Q$f\E registered\z!, 'set exit fifo');
+};
+
my $spawn_httpd = sub {
my (@args) = @_;
my $cmd = [ '-httpd', @args, "--stdout=$out", "--stderr=$err", $psgi ];
}
ok(!-S $unix, 'UNIX socket does not exist, yet');
-$spawn_httpd->("-l$unix", '-W0');
-my %o = (Peer => $unix, Type => SOCK_STREAM);
-for (1..1000) {
- last if -S $unix && IO::Socket::UNIX->new(%o);
- select undef, undef, undef, 0.02
+my $f1 = "$tmpdir/f1";
+mkfifo($f1, 0600);
+{
+ local $ENV{TEST_OPEN_FIFO} = $f1;
+ $spawn_httpd->("-l$unix", '-W0');
+ open my $fh, '<', $f1 or xbail "open($f1): $!";
+ is(my $hi = <$fh>, "hi\n", 'got FIFO greeting');
}
-
ok(-S $unix, 'UNIX socket was bound by -httpd');
+
+sub new_sock ($) {
+ IO::Socket::UNIX->new(Peer => $_[0], Type => SOCK_STREAM)
+ // xbail "E: $! connecting to $_[0]";
+}
+
sub check_sock ($) {
my ($unix) = @_;
- my $sock = IO::Socket::UNIX->new(Peer => $unix, Type => SOCK_STREAM);
- warn "E: $! connecting to $unix\n" unless defined $sock;
- ok($sock, 'client UNIX socket connected');
+ my $sock = new_sock($unix);
ok($sock->write("GET /host-port HTTP/1.0\r\n\r\n"),
'wrote req to server');
ok($sock->read(my $buf, 4096), 'read response');
- like($buf, qr!\r\n\r\n127\.0\.0\.1:0\z!,
+ like($buf, qr!\r\n\r\n127\.0\.0\.1 0\z!,
'set REMOTE_ADDR and REMOTE_PORT for Unix socket');
}
ok(-S $unix, 'unix socket still exists');
}
+# portable Perl can delay or miss signal dispatches due to races,
+# so disable some tests on systems lacking signalfd(2) or EVFILT_SIGNAL
+my $has_sigfd = PublicInbox::Sigfd->new({}, 0) ? 1 : $ENV{TEST_UNRELIABLE};
+
+sub delay_until {
+ my $cond = shift;
+ my $end = time + 30;
+ do {
+ return if $cond->();
+ tick(0.012);
+ } until (time > $end);
+ Carp::confess('condition failed');
+}
+
SKIP: {
- eval 'require Net::Server::Daemonize';
- skip('Net::Server missing for pid-file/daemonization test', 20) if $@;
+ require_mods('Net::Server::Daemonize', 52);
+ $has_sigfd or skip('signalfd / EVFILT_SIGNAL not available', 52);
my $pid_file = "$tmpdir/pid";
+ my $read_pid = sub {
+ my $f = shift;
+ open my $fh, '<', $f or die "open $f failed: $!";
+ my $pid = do { local $/; <$fh> };
+ chomp($pid) or die("pid file not ready $!");
+ $pid;
+ };
+
for my $w (qw(-W0 -W1)) {
+ pipe(my ($p0, $p1)) or xbail "pipe: $!";
+ fcntl($p1, F_SETFD, 0) or xbail "fcntl: $!"; # clear FD_CLOEXEC
# wait for daemonization
$spawn_httpd->("-l$unix", '-D', '-P', $pid_file, $w);
+ close $p1 or xbail "close: $!";
$td->join;
is($?, 0, "daemonized $w process");
check_sock($unix);
-
- ok(-f $pid_file, "$w pid file written");
- open my $fh, '<', "$tmpdir/pid" or die "open failed: $!";
- my $rpid = do { local $/; <$fh> };
- chomp $rpid;
- like($rpid, qr/\A\d+\z/s, "$w pid file looks like a pid");
- is(kill('TERM', $rpid), 1, "signaled daemonized $w process");
- for (1..100) {
- kill(0, $rpid) or last;
- select undef, undef, undef, 0.02;
- }
- is(kill(0, $rpid), 0, "daemonized $w process exited");
+ ok(-s $pid_file, "$w pid file written");
+ my $pid = $read_pid->($pid_file);
+ is(kill('TERM', $pid), 1, "signaled daemonized $w process");
+ vec(my $rvec = '', fileno($p0), 1) = 1;
+ delete $td->{-extra}; # drop tail(1) process
+ is(select($rvec, undef, undef, 1), 1, 'timeout for pipe HUP');
+ is(my $undef = <$p0>, undef, 'process closed pipe writer at exit');
ok(!-e $pid_file, "$w pid file unlinked at exit");
}
+
+ my $httpd = abs_path('blib/script/public-inbox-httpd');
+ $psgi = abs_path($psgi);
+ my $opt = { run_mode => 0 };
+ my @args = ("-l$unix", '-D', '-P', $pid_file, -1, $out, -2, $err);
+
+ if ('USR2 upgrades with workers') {
+ pipe(my ($p0, $p1)) or xbail "pipe: $!";
+ fcntl($p1, F_SETFD, 0) or xbail "fcntl: $!"; # clear FD_CLOEXEC
+
+ $td = start_script([$httpd, @args, $psgi], undef, $opt);
+ close($p1) or xbail "close: $!";
+ $td->join;
+ is($?, 0, "daemonized process again");
+ check_sock($unix);
+ ok(-s $pid_file, 'pid file written');
+ my $pid = $read_pid->($pid_file);
+
+ # stop worker to ensure check_sock below hits $new_pid
+ kill('TTOU', $pid) or die "TTOU failed: $!";
+
+ kill('USR2', $pid) or die "USR2 failed: $!";
+ delay_until(sub {
+ $pid != (eval { $read_pid->($pid_file) } // $pid)
+ });
+ my $new_pid = $read_pid->($pid_file);
+ isnt($new_pid, $pid, 'new child started');
+ ok($new_pid > 0, '$new_pid valid');
+ delay_until(sub { -s "$pid_file.oldbin" });
+ my $old_pid = $read_pid->("$pid_file.oldbin");
+ is($old_pid, $pid, '.oldbin pid file written');
+ ok($old_pid > 0, '$old_pid valid');
+
+ check_sock($unix); # ensures $new_pid is ready to receive signals
+
+ # first, back out of the upgrade
+ kill('QUIT', $new_pid) or die "kill new PID failed: $!";
+ delay_until(sub {
+ $pid == (eval { $read_pid->($pid_file) } // 0)
+ });
+ is($read_pid->($pid_file), $pid, 'old PID file restored');
+ ok(!-f "$pid_file.oldbin", '.oldbin PID file gone');
+
+ # retry USR2 upgrade
+ kill('USR2', $pid) or die "USR2 failed: $!";
+ delay_until(sub {
+ $pid != (eval { $read_pid->($pid_file) } // $pid)
+ });
+ $new_pid = $read_pid->($pid_file);
+ isnt($new_pid, $pid, 'new child started again');
+ $old_pid = $read_pid->("$pid_file.oldbin");
+ is($old_pid, $pid, '.oldbin pid file written');
+
+ # drop the old parent
+ kill('QUIT', $old_pid) or die "QUIT failed: $!";
+ delay_until(sub { !kill(0, $old_pid) }); # UGH
+
+ ok(!-f "$pid_file.oldbin", '.oldbin PID file gone');
+
+ # drop the new child
+ check_sock($unix);
+ kill('QUIT', $new_pid) or die "QUIT failed: $!";
+
+ vec(my $rvec = '', fileno($p0), 1) = 1;
+ is(select($rvec, undef, undef, 1), 1, 'timeout for pipe HUP');
+ is(my $u = <$p0>, undef, 'process closed pipe writer at exit');
+
+ ok(!-f $pid_file, 'PID file is gone');
+ }
+
+ if ('try USR2 without workers (-W0)') {
+ pipe(my ($p0, $p1)) or xbail "pipe: $!";
+ fcntl($p1, F_SETFD, 0) or xbail "fcntl: $!"; # clear FD_CLOEXEC
+ $td = start_script([$httpd, @args, '-W0', $psgi], undef, $opt);
+ close $p1 or xbail "close: $!";
+ $td->join;
+ is($?, 0, 'daemonized w/o workers');
+ $register_exit_fifo->($unix, $f1);
+ my $pid = $read_pid->($pid_file);
+
+ # replace running process
+ kill('USR2', $pid) or xbail "USR2 failed: $!";
+ open my $fh, '<', $f1 or xbail "open($f1): $!";
+ is(my $bye = <$fh>, "bye from $pid\n", 'got FIFO bye');
+
+ check_sock($unix);
+ $pid = $read_pid->($pid_file);
+ kill('QUIT', $pid) or xbail "USR2 failed: $!";
+
+ vec(my $rvec = '', fileno($p0), 1) = 1;
+ is(select($rvec, undef, undef, 1), 1, 'timeout for pipe HUP');
+ is(my $u = <$p0>, undef, 'process closed pipe writer at exit');
+ ok(!-f $pid_file, 'PID file is gone');
+ }
}
done_testing();