[PATCH 5/5] finalize DragonFlyBSD support

[Eric Wong <e@80x24.org>]

require_bsd and require_mods(':fcntl_lock') are now
supported in TestCommon to make it easier to maintain
than a big list of regexps.

getsockopt for SO_ACCEPTFILTER seems to always succeed,
even if the retrieved struct is all zeroes.
---
 install/os.perl               |  7 ++++---
 lib/PublicInbox/Daemon.pm     |  4 ++--
 lib/PublicInbox/IPC.pm        |  1 +
 lib/PublicInbox/MboxLock.pm   | 10 +++++++---
 lib/PublicInbox/POP3D.pm      |  4 ++--
 lib/PublicInbox/TestCommon.pm | 19 +++++++++++++++++--
 t/ds-kqxs.t                   |  5 +++--
 t/kqnotify.t                  | 28 +++++++++++++++++++++++++++-
 t/pop3d-limit.t               |  4 +---
 t/pop3d.t                     |  6 ++----
 t/search.t                    |  2 +-
 xt/pop3d-mpop.t               |  5 ++---
 12 files changed, 69 insertions(+), 26 deletions(-)

diff --git a/install/os.perl b/install/os.perl
index 4fcbcbe4..bf5c55c2 100644
--- a/install/os.perl
+++ b/install/os.perl
@@ -40,7 +40,7 @@ EOM
 		last if $ID ne '' && $VERSION_ID ne '';
 	}
 	$ID = 'linux' if $ID eq ''; # cf. os-release(5)
-} elsif ($^O =~ m!\A(?:free|net|open)bsd\z!) { # TODO: net? dragonfly?
+} elsif ($^O =~ m!\A(?:free|net|open)bsd\z! || $^O eq 'dragonfly') {
 	$ID = $^O;
 	require POSIX;
 	(undef, undef, $release, $version) = POSIX::uname();
@@ -50,7 +50,8 @@ EOM
 	die "$^O unsupported";
 }
 $VERSION_ID //= 0; # numeric? could be 'sid', actually...
-my %MIN_VER = (freebsd => v11, openbsd => v7.3, netbsd => v9.3);
+my %MIN_VER = (freebsd => v11, openbsd => v7.3, netbsd => v9.3,
+	dragonfly => v6.4);
 
 if (defined(my $min_ver = $MIN_VER{$^O})) {
 	my $vid = $VERSION_ID;
@@ -63,7 +64,7 @@ EOM
 }
 
 sub pkg_fmt () {
-	if ($ID eq 'freebsd') { 'pkg' }
+	if ($ID =~ /\A(?:freebsd|dragonfly)\z/) { 'pkg' }
 	# *shrug*, as long as the (Net|Open)BSD names don't conflict w/ FreeBSD
 	elsif ($ID eq 'netbsd') { 'pkgin' }
 	elsif ($ID eq 'openbsd') { 'pkg_add' }
diff --git a/lib/PublicInbox/Daemon.pm b/lib/PublicInbox/Daemon.pm
index a4c99cca..520cef72 100644
--- a/lib/PublicInbox/Daemon.pm
+++ b/lib/PublicInbox/Daemon.pm
@@ -634,9 +634,9 @@ sub defer_accept ($$) {
 		my $sec = unpack('i', $x);
 		return if $sec > 0; # systemd users may set a higher value
 		setsockopt($s, IPPROTO_TCP, $TCP_DEFER_ACCEPT, 1);
-	} elsif ($^O =~ /\A(?:freebsd|netbsd)\z/) {
+	} elsif ($^O =~ /\A(?:freebsd|netbsd|dragonfly)\z/) {
 		my $x = getsockopt($s, SOL_SOCKET, $SO_ACCEPTFILTER);
-		return if defined $x; # don't change if set
+		return if ($x // "\0") =~ /[^\0]/s; # don't change if set
 		my $accf_arg = pack('a16a240', $af_name, '');
 		setsockopt($s, SOL_SOCKET, $SO_ACCEPTFILTER, $accf_arg);
 	}
diff --git a/lib/PublicInbox/IPC.pm b/lib/PublicInbox/IPC.pm
index 839281b2..068c5623 100644
--- a/lib/PublicInbox/IPC.pm
+++ b/lib/PublicInbox/IPC.pm
@@ -437,6 +437,7 @@ sub DESTROY {
 my %NPROCESSORS_ONLN = (
 	linux => 84,
 	freebsd => 58,
+	dragonfly => 58,
 	openbsd => 503,
 	netbsd => 1002
 );
diff --git a/lib/PublicInbox/MboxLock.pm b/lib/PublicInbox/MboxLock.pm
index 95aa9862..9d7d4a32 100644
--- a/lib/PublicInbox/MboxLock.pm
+++ b/lib/PublicInbox/MboxLock.pm
@@ -12,9 +12,13 @@ use PublicInbox::DS qw(now); # ugh...
 use autodie qw(chdir opendir unlink);
 
 our $TMPL = do {
-	if ($^O eq 'linux') { \'s @32' }
-	elsif ($^O =~ /bsd/) { \'@20 s @256' } # n.b. @32 may be enough...
-	else { eval { require File::FcntlLock; 1 } }
+	if ($^O eq 'linux') {
+		\'s @32'
+	} elsif ($^O =~ /bsd/ || $^O eq 'dragonfly') {
+		\'@20 s @256' # n.b. @32 may be enough...
+	} else {
+		 eval { require File::FcntlLock; 1 }
+	}
 };
 
 # This order matches Debian policy on Linux systems.
diff --git a/lib/PublicInbox/POP3D.pm b/lib/PublicInbox/POP3D.pm
index 2a9ccfdd..38e982ee 100644
--- a/lib/PublicInbox/POP3D.pm
+++ b/lib/PublicInbox/POP3D.pm
@@ -15,7 +15,7 @@ use File::Temp 0.19 (); # 0.19 for ->newdir
 use Fcntl qw(F_SETLK F_UNLCK F_WRLCK SEEK_SET);
 my ($FLOCK_TMPL, @FLOCK_ORDER);
 # are all BSDs the same "struct flock"? tested Free+Net+Open...
-if ($^O eq 'linux' || $^O =~ /bsd/) {
+if ($^O =~ /\A(?:linux|dragonfly)\z/ || $^O =~ /bsd/) {
 	require Config;
 	my $off_t;
 	my $sz = $Config::Config{lseeksize};
@@ -28,7 +28,7 @@ if ($^O eq 'linux' || $^O =~ /bsd/) {
 		if ($^O eq 'linux') {
 			$FLOCK_TMPL = "ss\@8$off_t$off_t\@32";
 			@FLOCK_ORDER = qw(l_type l_whence l_start l_len);
-		} elsif ($^O =~ /bsd/) { # @32 may be enough
+		} else { # *bsd including dragonfly
 			$FLOCK_TMPL = "${off_t}${off_t}lss\@256";
 			@FLOCK_ORDER = qw(l_start l_len l_pid l_type l_whence);
 		}
diff --git a/lib/PublicInbox/TestCommon.pm b/lib/PublicInbox/TestCommon.pm
index 32213fde..323152b4 100644
--- a/lib/PublicInbox/TestCommon.pm
+++ b/lib/PublicInbox/TestCommon.pm
@@ -23,7 +23,7 @@ BEGIN {
 	@EXPORT = qw(tmpdir tcp_server tcp_connect require_git require_mods
 		run_script start_script key2sub xsys xsys_e xqx eml_load tick
 		have_xapian_compact json_utf8 setup_public_inboxes create_inbox
-		create_coderepo no_scm_rights
+		create_coderepo require_bsd
 		quit_waiter_pipe wait_for_eof
 		tcp_host_port test_lei lei lei_ok $lei_out $lei_err $lei_opt
 		test_httpd xbail require_cmd is_xdeeply tail_f
@@ -35,6 +35,15 @@ BEGIN {
 	push @EXPORT, @methods;
 }
 
+sub require_bsd (;$) {
+	state $ok = ($^O =~ m!\A(?:free|net|open)bsd\z! ||
+			$^O eq 'dragonfly');
+	return 1 if $ok;
+	return if defined(wantarray);
+	my $m = "$0 is BSD-only (\$^O=$^O)";
+	@_ ? skip($m) : plan(skip_all => $m);
+}
+
 sub xbail (@) { BAIL_OUT join(' ', map { ref() ? (explain($_)) : ($_) } @_) }
 
 sub eml_load ($) {
@@ -136,7 +145,8 @@ my %IPv6_VERSION = (
 sub need_accept_filter ($) {
 	my ($af) = @_;
 	return if $^O eq 'netbsd'; # since NetBSD 5.0
-	skip 'SO_ACCEPTFILTER is FreeBSD/NetBSD-only' if $^O ne 'freebsd';
+	$^O =~ /\A(?:freebsd|dragonfly)\z/ or
+		skip 'SO_ACCEPTFILTER is FreeBSD/NetBSD/Dragonfly-only so far';
 	state $tried = {};
 	($tried->{$af} //= system("kldstat -m $af >/dev/null")) and
 		skip "$af not loaded: kldload $af";
@@ -175,6 +185,11 @@ sub require_mods {
 				push @need, $msg;
 				next;
 			}
+		} elsif ($mod eq ':fcntl_lock') {
+			next if $^O eq 'linux' || require_bsd;
+			diag "untested platform: $^O, ".
+				"requiring File::FcntlLock...";
+			push @mods, 'File::FcntlLock';
 		} elsif ($mod =~ /\A\+(accf_.*)\z/) {
 			need_accept_filter($1);
 			next
diff --git a/t/ds-kqxs.t b/t/ds-kqxs.t
index 57acb53f..87f7199d 100644
--- a/t/ds-kqxs.t
+++ b/t/ds-kqxs.t
@@ -6,8 +6,9 @@
 use v5.12;
 use Test::More;
 unless (eval { require IO::KQueue }) {
-	my $m = $^O !~ /bsd/ ? 'DSKQXS is only for *BSD systems'
-				: "no IO::KQueue, skipping $0: $@";
+	my $m = ($^O =~ /bsd/ || $^O eq 'dragonfly') ?
+		"no IO::KQueue, skipping $0: $@" :
+		'DSKQXS is only for *BSD systems';
 	plan skip_all => $m;
 }
 
diff --git a/t/kqnotify.t b/t/kqnotify.t
index edecf2e1..cf32b633 100644
--- a/t/kqnotify.t
+++ b/t/kqnotify.t
@@ -7,7 +7,7 @@
 use v5.12;
 use PublicInbox::TestCommon;
 use autodie;
-plan skip_all => 'KQNotify is only for *BSD systems' if $^O !~ /bsd/;
+require_bsd;
 require_mods('IO::KQueue');
 use_ok 'PublicInbox::KQNotify';
 my ($tmpdir, $for_destroy) = tmpdir();
@@ -33,9 +33,35 @@ $hit = [ grep(m!/link$!, @read) ];
 is_deeply($hit, ["$tmpdir/new/link"], 'link(2) detected (via NOTE_WRITE)')
 	or diag explain(\@read);
 
+{
+	my $d = "$tmpdir/new/ANOTHER";
+	mkdir $d;
+	$hit = [ map { $_->fullname } $kqn->read ];
+	is_xdeeply($hit, [ $d ], 'mkdir detected');
+	rmdir $d;
+	# TODO: should we always watch for directory removals?
+}
+
 $w->cancel;
 link("$tmpdir/new/tst", "$tmpdir/new/link2");
 $hit = [ map { $_->fullname } $kqn->read ];
 is_deeply($hit, [], 'link(2) not detected after cancel');
 
+# rearm:
+my $GONE = PublicInbox::KQNotify::NOTE_DELETE() |
+	PublicInbox::KQNotify::NOTE_REVOKE() |
+	PublicInbox::KQNotify::NOTE_ATTRIB() |
+	PublicInbox::KQNotify::NOTE_WRITE() |
+	PublicInbox::KQNotify::NOTE_RENAME();
+$w = $kqn->watch("$tmpdir/new", $mask|$GONE);
+my @unlink = sort glob("$tmpdir/new/*");
+unlink(@unlink);
+$hit = [ sort(map { $_->fullname } $kqn->read) ];
+is_xdeeply($hit, \@unlink, 'unlinked files match');
+
+# this is unreliable on Dragonfly tmpfs (fixed post-6.4)
+rmdir "$tmpdir/new";
+$hit = [ sort(map { $_->fullname } $kqn->read) ];
+is(scalar(@$hit), 1, 'detected self removal');
+
 done_testing;
diff --git a/t/pop3d-limit.t b/t/pop3d-limit.t
index 00da477d..79e320af 100644
--- a/t/pop3d-limit.t
+++ b/t/pop3d-limit.t
@@ -3,9 +3,7 @@
 # License: AGPL-3.0+ <https://www.gnu.org/licenses/agpl-3.0.txt>
 use v5.12;
 use PublicInbox::TestCommon;
-require_mods(qw(DBD::SQLite Net::POP3));
-$^O =~ /\A(?:linux|(?:free|net|open)bsd)\z/ or
-	require_mods(qw(File::FcntlLock));
+require_mods(qw(DBD::SQLite Net::POP3 :fcntl_lock));
 use autodie;
 my ($tmpdir, $for_destroy) = tmpdir();
 mkdir("$tmpdir/p3state");
diff --git a/t/pop3d.t b/t/pop3d.t
index fce4a788..ee19f2d7 100644
--- a/t/pop3d.t
+++ b/t/pop3d.t
@@ -12,10 +12,8 @@ unless (-r $key && -r $cert) {
 }
 
 # Net::POP3 is part of the standard library, but distros may split it off...
-require_mods(qw(DBD::SQLite Net::POP3 IO::Socket::SSL));
-require_git('2.6'); # for v2
-$^O =~ /\A(?:linux|(?:free|net|open)bsd)\z/ or
-	require_mods(qw(File::FcntlLock));
+require_mods(qw(DBD::SQLite Net::POP3 IO::Socket::SSL :fcntl_lock));
+require_git(v2.6); # for v2
 use_ok 'IO::Socket::SSL';
 use_ok 'PublicInbox::TLS';
 my ($tmpdir, $for_destroy) = tmpdir();
diff --git a/t/search.t b/t/search.t
index 636dc5cf..282ae586 100644
--- a/t/search.t
+++ b/t/search.t
@@ -440,7 +440,7 @@ my $dir_mask = 02770;
 # FreeBSD, OpenBSD and NetBSD do not allow non-root users to set S_ISGID,
 # so git doesn't set it, either (see DIR_HAS_BSD_GROUP_SEMANTICS in git.git)
 # Presumably all *BSDs behave the same way.
-if ($^O =~ /\A.+bsd\z/i) {
+if (require_bsd) {
 	$all_mask = 0777;
 	$dir_mask = 0770;
 }
diff --git a/xt/pop3d-mpop.t b/xt/pop3d-mpop.t
index 9da1050c..ff8bb5dc 100644
--- a/xt/pop3d-mpop.t
+++ b/xt/pop3d-mpop.t
@@ -12,9 +12,8 @@ my $inboxdir = $ENV{GIANT_INBOX_DIR};
 plan skip_all => "bad characters in $inboxdir" if $inboxdir =~ m![^\w\.\-/]!;
 my $uuidgen = require_cmd('uuidgen');
 my $mpop = require_cmd('mpop');
-require_mods(qw(DBD::SQLite));
-require_git('2.6'); # for v2
-require_mods(qw(File::FcntlLock)) if $^O !~ /\A(?:linux|freebsd)\z/;
+require_mods(qw(DBD::SQLite :fcntl_lock));
+require_git(v2.6); # for v2
 
 my ($tmpdir, $for_destroy) = tmpdir();
 my $cfg = "$tmpdir/cfg";