From: Eric Wong <e@80x24.org>
To: meta@public-inbox.org
Subject: [PATCH 10/12] lei: remove @TO_CLOSE_ATFORK_CHILD
Date: Thu, 21 Jan 2021 19:46:22 +0000 [thread overview]
Message-ID: <20210121194624.32002-11-e@80x24.org> (raw)
In-Reply-To: <20210121194624.32002-1-e@80x24.org>
..At least limit it to a single file handle. The write end
EOFpipe can be limited in scope and auto-closed when $quit is
clobbered, leaving only the listener. The listener is the only
handle that needs to be closed explicitly due to it being on the
stack in the Listener->event_step => accept_dispatch => lei_$FOO
code path.
Everything else gets clobbered by DS->Reset in children after
forking.
---
lib/PublicInbox/LEI.pm | 40 +++++++++++++++++++---------------------
1 file changed, 19 insertions(+), 21 deletions(-)
diff --git a/lib/PublicInbox/LEI.pm b/lib/PublicInbox/LEI.pm
index ccfc1649..37b45a00 100644
--- a/lib/PublicInbox/LEI.pm
+++ b/lib/PublicInbox/LEI.pm
@@ -27,7 +27,7 @@ use Text::Wrap qw(wrap);
use File::Path qw(mkpath);
use File::Spec;
our $quit = \&CORE::exit;
-our ($current_lei, $errors_log);
+our ($current_lei, $errors_log, $listener);
my ($recv_cmd, $send_cmd);
my $GLP = Getopt::Long::Parser->new;
$GLP->configure(qw(gnu_getopt no_ignore_case auto_abbrev));
@@ -35,7 +35,6 @@ my $GLP_PASS = Getopt::Long::Parser->new;
$GLP_PASS->configure(qw(gnu_getopt no_ignore_case auto_abbrev pass_through));
our %PATH2CFG; # persistent for socket daemon
-our @TO_CLOSE_ATFORK_CHILD;
# TBD: this is a documentation mechanism to show a subcommand
# (may) pass options through to another command:
@@ -281,8 +280,7 @@ sub fail ($$;$) {
sub atfork_prepare_wq {
my ($self, $wq) = @_;
- my $tcafc = $wq->{-ipc_atfork_child_close} //= [];
- push @$tcafc, @TO_CLOSE_ATFORK_CHILD;
+ my $tcafc = $wq->{-ipc_atfork_child_close} //= [ $listener // () ];
if (my $sock = $self->{sock}) {
push @$tcafc, @$self{qw(0 1 2)}, $sock;
}
@@ -307,7 +305,6 @@ sub atfork_child_wq {
%PATH2CFG = ();
undef $errors_log;
$quit = \&CORE::exit;
- @TO_CLOSE_ATFORK_CHILD = ();
(__WARN__ => sub { err($self, @_) },
PIPE => sub {
$self->x_it(13); # SIGPIPE = 13
@@ -837,12 +834,12 @@ sub lazy_start {
die "connect($path): $!";
}
umask(077) // die("umask(077): $!");
- socket(my $l, AF_UNIX, SOCK_SEQPACKET, 0) or die "socket: $!";
- bind($l, pack_sockaddr_un($path)) or die "bind($path): $!";
- listen($l, 1024) or die "listen: $!";
+ local $listener;
+ socket($listener, AF_UNIX, SOCK_SEQPACKET, 0) or die "socket: $!";
+ bind($listener, pack_sockaddr_un($path)) or die "bind($path): $!";
+ listen($listener, 1024) or die "listen: $!";
my @st = stat($path) or die "stat($path): $!";
my $dev_ino_expect = pack('dd', $st[0], $st[1]); # dev+ino
- pipe(my ($eof_r, $eof_w)) or die "pipe: $!";
local $oldset = PublicInbox::DS::block_signals();
if ($narg == 5) {
$send_cmd = PublicInbox::Spawn->can('send_cmd4');
@@ -869,20 +866,21 @@ sub lazy_start {
return if $pid;
$0 = "lei-daemon $path";
local %PATH2CFG;
- local @TO_CLOSE_ATFORK_CHILD = ($l, $eof_w);
- $l->blocking(0);
- $l = PublicInbox::Listener->new($l, \&accept_dispatch, $l);
+ $listener->blocking(0);
my $exit_code;
- local $quit = sub {
- $exit_code //= shift;
- my $listener = $l or exit($exit_code);
- # closing eof_w triggers \&noop wakeup
- $eof_w = $l = $path = undef;
- $listener->close; # DS::close
- PublicInbox::DS->SetLoopTimeout(1000);
+ my $pil = PublicInbox::Listener->new($listener, \&accept_dispatch);
+ local $quit = do {
+ pipe(my ($eof_r, $eof_w)) or die "pipe: $!";
+ PublicInbox::EOFpipe->new($eof_r, \&noop, undef);
+ sub {
+ $exit_code //= shift;
+ my $lis = $pil or exit($exit_code);
+ # closing eof_w triggers \&noop wakeup
+ $listener = $eof_w = $pil = $path = undef;
+ $lis->close; # DS::close
+ PublicInbox::DS->SetLoopTimeout(1000);
+ };
};
- PublicInbox::EOFpipe->new($eof_r, \&noop, undef);
- undef $eof_r;
my $sig = {
CHLD => \&PublicInbox::DS::enqueue_reap,
QUIT => $quit,
next prev parent reply other threads:[~2021-01-21 19:46 UTC|newest]
Thread overview: 13+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-01-21 19:46 [PATCH 00/12] lei: another dump Eric Wong
2021-01-21 19:46 ` [PATCH 01/12] lei_overview: rename {relevance} => {pct} Eric Wong
2021-01-21 19:46 ` [PATCH 02/12] lei q: retrieve keywords for local, non-external messages Eric Wong
2021-01-21 19:46 ` [PATCH 03/12] lei_xsearch: eliminate some unused, commented-out code Eric Wong
2021-01-21 19:46 ` [PATCH 04/12] lei: show {pct} and {oid} in From_ lines and filenames Eric Wong
2021-01-21 19:46 ` [PATCH 05/12] lei: fix inadvertant FD sharing Eric Wong
2021-01-21 19:46 ` [PATCH 06/12] lei_to_mail: avoid segfault on exit Eric Wong
2021-01-21 19:46 ` [PATCH 07/12] lei: oneshot: use client $io[2] for placeholder Eric Wong
2021-01-21 19:46 ` [PATCH 08/12] lei: remove INT/QUIT/TERM handlers, fix daemon EOF Eric Wong
2021-01-21 19:46 ` [PATCH 09/12] lei_xsearch: reduce reference paths to lxs Eric Wong
2021-01-21 19:46 ` Eric Wong [this message]
2021-01-21 19:46 ` [PATCH 11/12] lei: forget-external support with canonicalization Eric Wong
2021-01-21 19:46 ` [PATCH 12/12] lei forget-external: bash completion support Eric Wong
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