t/lei-refresh-mail-sync: avoid kill+sleep loop

While we can't waitpid() on daemonized process, we can abuse the
lack of FD_CLOEXEC to detect a process death.  This saves
roughly 400ms for this slow test.

2 files changed, 15 insertions, 8 deletions

diff --git a/lib/PublicInbox/TestCommon.pm b/lib/PublicInbox/TestCommon.pm
index 1fe7931e..8a34e45a 100644
--- a/lib/PublicInbox/TestCommon.pm
+++ b/lib/PublicInbox/TestCommon.pm
@@ -480,6 +480,9 @@ sub start_script {
         my $pid = fork // die "fork: $!\n";
         if ($pid == 0) {
                 eval { PublicInbox::DS->Reset };
+                for (@{delete($opt->{-CLOFORK}) // []}) {
+                        close($_) or die "close $!";
+                }
                 # pretend to be systemd (cf. sd_listen_fds(3))
                 # 3 == SD_LISTEN_FDS_START
                 my $fd;
diff --git a/t/lei-refresh-mail-sync.t b/t/lei-refresh-mail-sync.t
index ea83a513..0498a0c4 100644
--- a/t/lei-refresh-mail-sync.t
+++ b/t/lei-refresh-mail-sync.t
@@ -5,17 +5,20 @@ use strict; use v5.10.1; use PublicInbox::TestCommon;
 require_mods(qw(lei));
 use File::Path qw(remove_tree);
 require Socket;
+use Fcntl qw(F_SETFD);
+
+pipe(my ($stop_r, $stop_w)) or xbail "pipe: $!";
+fcntl($stop_w, F_SETFD, 0) or xbail "F_SETFD: $!";
 
 my $stop_daemon = sub { # needed since we don't have inotify
+        close $stop_w or xbail "close \$stop_w: $!";
         lei_ok qw(daemon-pid);
         chomp(my $pid = $lei_out);
         $pid > 0 or xbail "bad pid: $pid";
         kill('TERM', $pid) or xbail "kill: $!";
-        for (0..10) {
-                tick;
-                kill(0, $pid) or last;
-        }
-        kill(0, $pid) and xbail "daemon still running (PID:$pid)";
+        is(sysread($stop_r, my $buf, 1), 0, 'daemon stop pipe read EOF');
+        pipe($stop_r, $stop_w) or xbail "pipe: $!";
+        fcntl($stop_w, F_SETFD, 0) or xbail "F_SETFD: $!";
 };
 
 test_lei({ daemon_only => 1 }, sub {
@@ -88,7 +91,8 @@ SKIP: {
                 $sock_cls //= ref($s);
                 my $cmd = [ "-$x", '-W0', "--stdout=$home/$x.out",
                         "--stderr=$home/$x.err" ];
-                my $td = start_script($cmd, $env, { 3 => $s }) or xbail("-$x");
+                my $opt = { 3 => $s, -CLOFORK => [ $stop_w ] };
+                my $td = start_script($cmd, $env, $opt) or xbail("-$x");
                 my $addr = tcp_host_port($s);
                 $srv->{$x} = { addr => $addr, td => $td, cmd => $cmd, s => $s };
         }
@@ -139,8 +143,8 @@ SKIP: {
         my $cmd = $srv->{imapd}->{cmd};
         my $s = $srv->{imapd}->{s};
         $s->blocking(0);
-        $srv->{imapd}->{td} = start_script($cmd, $env, { 3 => $s }) or
-                xbail "@$cmd";
+        my $opt = { 3 => $s, -CLOFORK => [ $stop_w ] };
+        $srv->{imapd}->{td} = start_script($cmd, $env, $opt) or xbail "@$cmd";
         lei_ok 'refresh-mail-sync', '--all';
         lei_ok 'inspect', "blob:$oid";
         is($lei_out, $before, 'no changes when server was down');