1 # Copyright (C) 2020 all contributors <meta@public-inbox.org>
2 # License: AGPL-3.0+ <https://www.gnu.org/licenses/agpl-3.0.txt>
4 # Backend for `lei' (local email interface). Unlike the C10K-oriented
5 # PublicInbox::Daemon, this is designed exclusively to handle trusted
6 # local clients with read/write access to the FS and use as many
7 # system resources as the local user has access to.
8 package PublicInbox::LEI;
11 use parent qw(PublicInbox::DS);
13 use Socket qw(AF_UNIX SOCK_STREAM pack_sockaddr_un);
14 use Errno qw(EAGAIN ECONNREFUSED ENOENT);
17 use Sys::Syslog qw(syslog openlog);
18 use PublicInbox::Config;
19 use PublicInbox::Syscall qw($SFD_NONBLOCK EPOLLIN EPOLLONESHOT);
20 use PublicInbox::Sigfd;
21 use PublicInbox::DS qw(now);
22 use PublicInbox::Spawn qw(spawn);
23 use PublicInbox::OnDestroy;
24 use Text::Wrap qw(wrap);
25 use File::Path qw(mkpath);
27 our $quit = \&CORE::exit;
28 my $GLP = Getopt::Long::Parser->new;
29 $GLP->configure(qw(gnu_getopt no_ignore_case auto_abbrev));
30 my $GLP_PASS = Getopt::Long::Parser->new;
31 $GLP_PASS->configure(qw(gnu_getopt no_ignore_case auto_abbrev pass_through));
33 our %PATH2CFG; # persistent for socket daemon
35 # TBD: this is a documentation mechanism to show a subcommand
36 # (may) pass options through to another command:
37 sub pass_through { $GLP_PASS }
41 File::Spec->rel2abs(($env->{XDG_DATA_HOME} //
42 ($env->{HOME} // '/nonexistent').'/.local/share')
43 .'/lei/store', $env->{PWD});
46 sub _config_path ($) {
48 File::Spec->rel2abs(($env->{XDG_CONFIG_HOME} //
49 ($env->{HOME} // '/nonexistent').'/.config')
50 .'/lei/config', $env->{PWD});
53 # TODO: generate shell completion + help using %CMD and %OPTDESC
54 # command => [ positional_args, 1-line description, Getopt::Long option spec ]
55 our %CMD = ( # sorted in order of importance/use:
56 'query' => [ 'SEARCH_TERMS...', 'search for messages matching terms', qw(
57 save-as=s output|o=s format|f=s dedupe|d=s thread|t augment|a
58 limit|n=i sort|s=s@ reverse|r offset=i remote local! extinbox!
59 since|after=s until|before=s) ],
61 'show' => [ 'MID|OID', 'show a given object (Message-ID or object ID)',
62 qw(type=s solve! format|f=s dedupe|d=s thread|t remote local!),
63 pass_through('git show') ],
65 'add-extinbox' => [ 'URL_OR_PATHNAME',
66 'add/set priority of a publicinbox|extindex for extra matches',
68 'ls-extinbox' => [ '[FILTER...]', 'list publicinbox|extindex locations',
69 qw(format|f=s z local remote) ],
70 'forget-extinbox' => [ '{URL_OR_PATHNAME|--prune}',
71 'exclude further results from a publicinbox|extindex',
74 'ls-query' => [ '[FILTER...]', 'list saved search queries',
75 qw(name-only format|f=s z) ],
76 'rm-query' => [ 'QUERY_NAME', 'remove a saved search' ],
77 'mv-query' => [ qw(OLD_NAME NEW_NAME), 'rename a saved search' ],
79 'plonk' => [ '--thread|--from=IDENT',
80 'exclude mail matching From: or thread from non-Message-ID searches',
81 qw(stdin| thread|t from|f=s mid=s oid=s) ],
82 'mark' => [ 'MESSAGE_FLAGS...',
83 'set/unset flags on message(s) from stdin',
84 qw(stdin| oid=s exact by-mid|mid:s) ],
85 'forget' => [ '[--stdin|--oid=OID|--by-mid=MID]',
86 'exclude message(s) on stdin from query results',
87 qw(stdin| oid=s exact by-mid|mid:s quiet|q) ],
89 'purge-mailsource' => [ '{URL_OR_PATHNAME|--all}',
90 'remove imported messages from IMAP, Maildirs, and MH',
91 qw(exact! all jobs:i indexed) ],
93 # code repos are used for `show' to solve blobs from patch mails
94 'add-coderepo' => [ 'PATHNAME', 'add or set priority of a git code repo',
96 'ls-coderepo' => [ '[FILTER_TERMS...]',
97 'list known code repos', qw(format|f=s z) ],
98 'forget-coderepo' => [ 'PATHNAME',
99 'stop using repo to solve blobs from patches',
102 'add-watch' => [ '[URL_OR_PATHNAME]',
103 'watch for new messages and flag changes',
104 qw(import! flags! interval=s recursive|r exclude=s include=s) ],
105 'ls-watch' => [ '[FILTER...]', 'list active watches with numbers and status',
107 'pause-watch' => [ '[WATCH_NUMBER_OR_FILTER]', qw(all local remote) ],
108 'resume-watch' => [ '[WATCH_NUMBER_OR_FILTER]', qw(all local remote) ],
109 'forget-watch' => [ '{WATCH_NUMBER|--prune}', 'stop and forget a watch',
112 'import' => [ '{URL_OR_PATHNAME|--stdin}',
113 'one-shot import/update from URL or filesystem',
114 qw(stdin| limit|n=i offset=i recursive|r exclude=s include=s !flags),
117 'config' => [ '[...]', sub {
118 'git-config(1) wrapper for '._config_path($_[0]);
119 }, qw(config-file|system|global|file|f=s), # for conflict detection
120 pass_through('git config') ],
121 'init' => [ '[PATHNAME]', sub {
122 'initialize storage, default: '._store_path($_[0]);
124 'daemon-stop' => [ '', 'stop the lei-daemon' ],
125 'daemon-pid' => [ '', 'show the PID of the lei-daemon' ],
126 'daemon-env' => [ '[NAME=VALUE...]', 'set, unset, or show daemon environment',
127 qw(clear| unset|u=s@ z|0) ],
128 'help' => [ '[SUBCOMMAND]', 'show help' ],
130 # XXX do we need this?
131 # 'git' => [ '[ANYTHING...]', 'git(1) wrapper', pass_through('git') ],
133 'reorder-local-store-and-break-history' => [ '[REFNAME]',
134 'rewrite git history in an attempt to improve compression',
137 # internal commands are prefixed with '_'
138 '_complete' => [ '[...]', 'internal shell completion helper',
139 pass_through('everything') ],
142 # switch descriptions, try to keep consistent across commands
143 # $spec: Getopt::Long option specification
144 # $spec => [@ALLOWED_VALUES (default is first), $description],
145 # $spec => $description
146 # "$SUB_COMMAND TAB $spec" => as above
147 my $stdin_formats = [ 'IN|auto|raw|mboxrd|mboxcl2|mboxcl|mboxo',
148 'specify message input format' ];
149 my $ls_format = [ 'OUT|plain|json|null', 'listing output format' ];
152 'help|h' => 'show this built-in help',
153 'quiet|q' => 'be quiet',
154 'solve!' => 'do not attempt to reconstruct blobs from emails',
155 'save-as=s' => ['NAME', 'save a search terms by given name'],
157 'type=s' => [ 'any|mid|git', 'disambiguate type' ],
159 'dedupe|d=s' => ['STRAT|content|oid|mid',
160 'deduplication strategy'],
161 'show thread|t' => 'display entire thread a message belongs to',
163 'return all messages in the same thread as the actual match(es)',
164 'augment|a' => 'augment --output destination instead of clobbering',
166 'output|o=s' => [ 'DEST',
167 "destination (e.g. `/path/to/Maildir', or `-' for stdout)" ],
169 'show format|f=s' => [ 'OUT|plain|raw|html|mboxrd|mboxcl2|mboxcl',
170 'message/object output format' ],
171 'mark format|f=s' => $stdin_formats,
172 'forget format|f=s' => $stdin_formats,
173 'query format|f=s' => [ 'OUT|maildir|mboxrd|mboxcl2|mboxcl|html|oid',
174 'specify output format, default depends on --output'],
175 'ls-query format|f=s' => $ls_format,
176 'ls-extinbox format|f=s' => $ls_format,
178 'limit|n=i' => ['NUM',
179 'limit on number of matches (default: 10000)' ],
180 'offset=i' => ['OFF', 'search result offset (default: 0)'],
182 'sort|s=s@' => [ 'VAL|internaldate,date,relevance,docid',
183 "order of results `--output'-dependent"],
185 'prio=i' => 'priority of query source',
187 'local' => 'limit operations to the local filesystem',
188 'local!' => 'exclude results from the local filesystem',
189 'remote' => 'limit operations to those requiring network access',
190 'remote!' => 'prevent operations requiring network access',
192 'mid=s' => 'specify the Message-ID of a message',
193 'oid=s' => 'specify the git object ID of a message',
195 'recursive|r' => 'scan directories/mailboxes/newsgroups recursively',
196 'exclude=s' => 'exclude mailboxes/newsgroups based on pattern',
197 'include=s' => 'include mailboxes/newsgroups based on pattern',
199 'exact' => 'operate on exact header matches only',
200 'exact!' => 'rely on content match instead of exact header matches',
202 'by-mid|mid:s' => [ 'MID', 'match only by Message-ID, ignoring contents' ],
203 'jobs:i' => 'set parallelism level',
205 # xargs, env, use "-0", git(1) uses "-z". Should we support z|0 everywhere?
206 'z' => 'use NUL \\0 instead of newline (CR) to delimit lines',
207 'z|0' => 'use NUL \\0 instead of newline (CR) to delimit lines',
209 # note: no "--ignore-environment" / "-i" support like env(1) since that
210 # is one-shot and this is for a persistent daemon:
211 'clear|' => 'clear the daemon environment',
212 'unset|u=s@' => ['NAME',
213 'unset matching NAME, may be specified multiple times'],
217 'leistore.dir' => 'top-level storage location',
220 sub x_it ($$) { # pronounced "exit"
221 my ($self, $code) = @_;
222 if (my $sig = ($code & 127)) {
223 kill($sig, $self->{pid} // $$);
226 if (my $sock = $self->{sock}) {
227 say $sock "exit=$code";
228 } else { # for oneshot
234 sub puts ($;@) { print { shift->{1} } map { "$_\n" } @_ }
237 my ($self, $channel) = @_; # $buf = $_[2]
238 print { $self->{$channel} } $_[2] or die "print FD[$channel]: $!";
242 my ($self, $buf) = @_;
243 $buf .= "\n" unless $buf =~ /\n\z/s;
244 emit($self, 2, $buf);
247 sub qerr { $_[0]->{opt}->{quiet} or err(@_) }
250 my ($self, $buf, $exit_code) = @_;
252 x_it($self, ($exit_code // 1) << 8);
257 my ($self, $errmsg) = @_;
258 my $cmd = $self->{cmd} // 'COMMAND';
259 my @info = @{$CMD{$cmd} // [ '...', '...' ]};
260 my @top = ($cmd, shift(@info) // ());
261 my $cmd_desc = shift(@info);
262 $cmd_desc = $cmd_desc->($self->{env}) if ref($cmd_desc) eq 'CODE';
265 for my $sw (grep { !ref } @info) { # ("prio=s", "z", $GLP_PASS)
266 my $desc = $OPTDESC{"$cmd\t$sw"} // $OPTDESC{$sw} // next;
268 ($arg_vals, $desc) = @$desc if ref($desc) eq 'ARRAY';
270 # lower-case is a keyword (e.g. `content', `oid'),
271 # ALL_CAPS is a string description (e.g. `PATH')
272 if ($desc !~ /default/ && $arg_vals =~ /\b([a-z]+)[,\|]/) {
273 $desc .= "\ndefault: `$1'";
277 if ($x =~ s/!\z//) { # solve! => --no-solve
279 } elsif ($x =~ s/:.+//) { # optional args: $x = "mid:s"
280 @vals = (' [', undef, ']');
281 } elsif ($x =~ s/=.+//) { # required arg: $x = "type=s"
282 @vals = (' ', undef);
283 } # else: no args $x = 'thread|t'
284 for (split(/\|/, $x)) { # help|h
285 length($_) > 1 ? push(@l, "--$_") : push(@s, "-$_");
287 if (!scalar(@vals)) { # no args 'thread|t'
288 } elsif ($arg_vals =~ s/\A([A-Z_]+)\b//) { # "NAME"
291 $vals[1] = uc(substr($l[0], 2)); # "--type" => "TYPE"
293 if ($arg_vals =~ /([,\|])/) {
295 my @allow = split(/\Q$sep\E/, $arg_vals);
296 my $must = $sep eq '|' ? 'Must' : 'Can';
297 @allow = map { "`$_'" } @allow;
298 my $last = pop @allow;
299 $desc .= "\n$must be one of: " .
300 join(', ', @allow) . " or $last";
302 my $lhs = join(', ', @s, @l) . join('', @vals);
303 if ($x =~ /\|\z/) { # "stdin|" or "clear|"
304 $lhs =~ s/\A--/- , --/;
306 $lhs =~ s/\A--/ --/; # pad if no short options
308 $lpad = length($lhs) if length($lhs) > $lpad;
309 push @opt_desc, $lhs, $desc;
311 my $msg = $errmsg ? "E: $errmsg\n" : '';
318 local $Text::Wrap::columns = 78 - $lpad;
319 my $padding = ' ' x ($lpad + 2);
320 while (my ($lhs, $rhs) = splice(@opt_desc, 0, 2)) {
321 $msg .= ' '.pack("A$lpad", $lhs);
322 $rhs = wrap('', '', $rhs);
323 $rhs =~ s/\n/\n$padding/sg; # LHS pad continuation lines
327 my $channel = $errmsg ? 2 : 1;
328 emit($self, $channel, $msg);
329 x_it($self, $errmsg ? 1 << 8 : 0); # stderr => failure
334 my ($self, $cmd, $argv) = @_;
336 my $opt = $self->{opt} = {};
337 my $info = $CMD{$cmd} // [ '[...]' ];
338 my ($proto, undef, @spec) = @$info;
339 my $glp = ref($spec[-1]) ? pop(@spec) : $GLP; # or $GLP_PASS
340 push @spec, qw(help|h);
342 if ($spec[0] =~ s/\|\z//s) { # "stdin|" or "clear|" allows "-" alias
343 $lone_dash = $spec[0];
344 $opt->{$spec[0]} = \(my $var);
345 push @spec, '' => \$var;
347 $glp->getoptionsfromarray($argv, $opt, @spec) or
348 return _help($self, "bad arguments or options for $cmd");
349 return _help($self) if $opt->{help};
351 # "-" aliases "stdin" or "clear"
352 $opt->{$lone_dash} = ${$opt->{$lone_dash}} if defined $lone_dash;
355 my $POS_ARG = '[A-Z][A-Z0-9_]+';
357 my @args = split(/ /, $proto);
358 for my $var (@args) {
359 if ($var =~ /\A$POS_ARG\.\.\.\z/o) { # >= 1 args;
360 $inf = defined($argv->[$i]) and last;
361 $var =~ s/\.\.\.\z//;
362 $err = "$var not supplied";
363 } elsif ($var =~ /\A$POS_ARG\z/o) { # required arg at $i
364 $argv->[$i++] // ($err = "$var not supplied");
365 } elsif ($var =~ /\.\.\.\]\z/) { # optional args start
368 } elsif ($var =~ /\A\[$POS_ARG\]\z/) { # one optional arg
370 } elsif ($var =~ /\A.+?\|/) { # required FOO|--stdin
371 my @or = split(/\|/, $var);
374 if ($o =~ /\A--([a-z0-9\-]+)/) {
375 $ok = defined($opt->{$1});
377 } elsif (defined($argv->[$i])) {
381 } # else continue looping
384 $err = join(', ', @or) . " or $last must be set";
386 warn "BUG: can't parse `$var' in $proto";
390 # warn "inf=$inf ".scalar(@$argv). ' '.scalar(@args)."\n";
391 if (!$inf && scalar(@$argv) > scalar(@args)) {
392 $err //= 'too many arguments';
394 $err ? fail($self, "usage: lei $cmd $proto\nE: $err") : 1;
398 my ($self, $cmd, @argv) = @_;
399 local $SIG{__WARN__} = sub { err($self, "@_") };
400 return _help($self, 'no command given') unless defined($cmd);
401 my $func = "lei_$cmd";
403 if (my $cb = __PACKAGE__->can($func)) {
404 optparse($self, $cmd, \@argv) or return;
406 } elsif (grep(/\A-/, $cmd, @argv)) { # --help or -h only
408 $GLP->getoptionsfromarray([$cmd, @argv], $opt, qw(help|h)) or
409 return _help($self, 'bad arguments or options');
412 fail($self, "`$cmd' is not an lei command");
417 my ($self, $creat) = @_;
418 my $f = _config_path($self->{env});
420 my $cur_st = @st ? pack('dd', $st[10], $st[7]) : ''; # 10:ctime, 7:size
421 if (my $cfg = $PATH2CFG{$f}) { # reuse existing object in common case
422 return ($self->{cfg} = $cfg) if $cur_st eq $cfg->{-st};
429 my (undef, $cfg_dir, undef) = File::Spec->splitpath($f);
430 -d $cfg_dir or mkpath($cfg_dir) or die "mkpath($cfg_dir): $!\n";
431 open my $fh, '>>', $f or die "open($f): $!\n";
432 @st = stat($fh) or die "fstat($f): $!\n";
433 $cur_st = pack('dd', $st[10], $st[7]);
434 qerr($self, "I: $f created") if $self->{cmd} ne 'config';
436 my $cfg = PublicInbox::Config::git_config_dump($f);
437 $cfg->{-st} = $cur_st;
439 $self->{cfg} = $PATH2CFG{$f} = $cfg;
442 sub _lei_store ($;$) {
443 my ($self, $creat) = @_;
444 my $cfg = _lei_cfg($self, $creat);
445 $cfg->{-lei_store} //= do {
446 require PublicInbox::LeiStore;
447 PublicInbox::SearchIdx::load_xapian_writable();
448 defined(my $dir = $cfg->{'leistore.dir'}) or return;
449 PublicInbox::LeiStore->new($dir, { creat => $creat });
454 my ($self, @argv) = @_;
458 my ($self, @argv) = @_;
462 my ($self, @argv) = @_;
466 my ($self, @argv) = @_;
467 $self->{opt}->{'config-file'} and return fail $self,
468 "config file switches not supported by `lei config'";
469 my $env = $self->{env};
470 delete local $env->{GIT_CONFIG};
471 my $cfg = _lei_cfg($self, 1);
472 my $cmd = [ qw(git config -f), $cfg->{'-f'}, @argv ];
473 my %rdr = map { $_ => $self->{$_} } (0..2);
474 require PublicInbox::Import;
475 PublicInbox::Import::run_die($cmd, $env, \%rdr);
479 my ($self, $dir) = @_;
480 my $cfg = _lei_cfg($self, 1);
481 my $cur = $cfg->{'leistore.dir'};
482 my $env = $self->{env};
483 $dir //= _store_path($env);
484 $dir = File::Spec->rel2abs($dir, $env->{PWD}); # PWD is symlink-aware
485 my @cur = stat($cur) if defined($cur);
486 $cur = File::Spec->canonpath($cur) if $cur;
487 my @dir = stat($dir);
488 my $exists = "I: leistore.dir=$cur already initialized" if @dir;
491 _lei_store($self, 1)->done;
492 return qerr($self, $exists);
495 # some folks like symlinks and bind mounts :P
496 if (@dir && "$cur[0] $cur[1]" eq "$dir[0] $dir[1]") {
497 lei_config($self, 'leistore.dir', $dir);
498 _lei_store($self, 1)->done;
499 return qerr($self, "$exists (as $cur)");
501 return fail($self, <<"");
502 E: leistore.dir=$cur already initialized and it is not $dir
505 lei_config($self, 'leistore.dir', $dir);
506 _lei_store($self, 1)->done;
507 $exists //= "I: leistore.dir=$dir newly initialized";
508 return qerr($self, $exists);
511 sub lei_daemon_pid { emit($_[0], 1, "$$\n") }
513 sub lei_daemon_stop { $quit->(0) }
516 my ($self, @argv) = @_;
517 my $opt = $self->{opt};
518 if (defined $opt->{clear}) {
520 } elsif (my $u = $opt->{unset}) {
524 %ENV = (%ENV, map { split(/=/, $_, 2) } @argv);
525 } elsif (!defined($opt->{clear}) && !$opt->{unset}) {
526 my $eor = $opt->{z} ? "\0" : "\n";
528 while (my ($k, $v) = each %ENV) { $buf .= "$k=$v$eor" }
533 sub lei_help { _help($_[0]) }
535 # Shell completion helper. Used by lei-completion.bash and hopefully
536 # other shells. Try to do as much here as possible to avoid redundancy
537 # and improve maintainability.
539 my ($self, @argv) = @_; # argv = qw(lei and any other args...)
540 shift @argv; # ignore "lei", the entire command is sent
541 @argv or return puts $self, grep(!/^_/, keys %CMD);
542 my $cmd = shift @argv;
543 my $info = $CMD{$cmd} // do { # filter matching commands
544 @argv or puts $self, grep(/\A\Q$cmd\E/, keys %CMD);
547 my ($proto, undef, @spec) = @$info;
549 my $re = defined($cur) ? qr/\A\Q$cur\E/ : qr/./;
550 if (substr($cur // '-', 0, 1) eq '-') { # --switches
551 # gross special case since the only git-config options
552 # Consider moving to a table if we need more special cases
553 # we use Getopt::Long for are the ones we reject, so these
554 # are the ones we don't reject:
555 if ($cmd eq 'config') {
556 puts $self, grep(/$re/, keys %CONFIG_KEYS);
557 @spec = qw(add z|null get get-all unset unset-all
558 replace-all get-urlmatch
559 remove-section rename-section
560 name-only list|l edit|e
561 get-color-name get-colorbool);
565 puts $self, grep(/$re/, map { # generate short/long names
567 if (s/=.+\z//) { # required arg, e.g. output|o=i
569 } elsif (s/:.+\z//) { # optional arg, e.g. mid:s
570 } else { # negation: solve! => no-solve|solve
571 s/\A(.+)!\z/no-$1|$1/;
574 length > 1 ? "--$_$eq" : "-$_"
575 } split(/\|/, $_, -1) # help|h
576 } grep { !ref } @spec); # filter out $GLP_PASS ref
577 } elsif ($cmd eq 'config' && !@argv && !$CONFIG_KEYS{$cur}) {
578 puts $self, grep(/$re/, keys %CONFIG_KEYS);
580 # TODO: URLs, pathnames, OIDs, MIDs, etc... See optparse() for
584 sub reap_exec { # dwaitpid callback
585 my ($self, $pid) = @_;
589 sub lei_git { # support passing through random git commands
590 my ($self, @argv) = @_;
591 my %rdr = map { $_ => $self->{$_} } (0..2);
592 my $pid = spawn(['git', @argv], $self->{env}, \%rdr);
593 PublicInbox::DS::dwaitpid($pid, \&reap_exec, $self);
596 sub accept_dispatch { # Listener {post_accept} callback
597 my ($sock) = @_; # ignore other
600 my $self = bless { sock => $sock }, __PACKAGE__;
601 vec(my $rin = '', fileno($sock), 1) = 1;
602 # `say $sock' triggers "die" in lei(1)
604 if (select(my $rout = $rin, undef, undef, 1)) {
605 my $fd = IO::FDPass::recv(fileno($sock));
607 my $rdr = ($fd == 0 ? '<&=' : '>&=');
608 if (open(my $fh, $rdr, $fd)) {
611 say $sock "open($rdr$fd) (FD=$i): $!";
615 say $sock "recv FD=$i: $!";
619 say $sock "timed out waiting to recv FD=$i";
623 # $ARGV_STR = join("]\0[", @ARGV);
624 # $ENV_STR = join('', map { "$_=$ENV{$_}\0" } keys %ENV);
625 # $line = "$$\0\0>$ARGV_STR\0\0>$ENV_STR\0\0";
626 my ($client_pid, $argv, $env) = do {
627 local $/ = "\0\0\0"; # yes, 3 NULs at EOL, not 2
628 chomp(my $line = <$sock>);
629 split(/\0\0>/, $line, 3);
631 my %env = map { split(/=/, $_, 2) } split(/\0/, $env);
632 if (chdir($env{PWD})) {
633 $self->{env} = \%env;
634 $self->{pid} = $client_pid;
635 eval { dispatch($self, split(/\]\0\[/, $argv)) };
638 say $sock "chdir($env{PWD}): $!"; # implicit close
644 # lei(1) calls this when it can't connect
646 my ($path, $errno) = @_;
647 if ($errno == ECONNREFUSED) {
648 unlink($path) or die "unlink($path): $!";
649 } elsif ($errno != ENOENT) {
650 $! = $errno; # allow interpolation to stringify in die
651 die "connect($path): $!";
653 umask(077) // die("umask(077): $!");
654 socket(my $l, AF_UNIX, SOCK_STREAM, 0) or die "socket: $!";
655 bind($l, pack_sockaddr_un($path)) or die "bind($path): $!";
656 listen($l, 1024) or die "listen: $!";
657 my @st = stat($path) or die "stat($path): $!";
658 my $dev_ino_expect = pack('dd', $st[0], $st[1]); # dev+ino
659 pipe(my ($eof_r, $eof_w)) or die "pipe: $!";
660 my $oldset = PublicInbox::Sigfd::block_signals();
662 require PublicInbox::Listener;
663 require PublicInbox::EOFpipe;
664 (-p STDOUT && -p STDERR) or die "E: stdout+stderr must be pipes\n";
665 open(STDIN, '+<', '/dev/null') or die "redirect stdin failed: $!";
666 POSIX::setsid() > 0 or die "setsid: $!";
667 my $pid = fork // die "fork: $!";
669 $0 = "lei-daemon $path";
671 $_->blocking(0) for ($l, $eof_r, $eof_w);
672 $l = PublicInbox::Listener->new($l, \&accept_dispatch, $l);
675 $exit_code //= shift;
676 my $listener = $l or exit($exit_code);
677 unlink($path) if defined($path);
678 # closing eof_w triggers \&noop wakeup
679 $eof_w = $l = $path = undef;
680 $listener->close; # DS::close
681 PublicInbox::DS->SetLoopTimeout(1000);
683 PublicInbox::EOFpipe->new($eof_r, \&noop, undef);
685 CHLD => \&PublicInbox::DS::enqueue_reap,
693 my $sigfd = PublicInbox::Sigfd->new($sig, $SFD_NONBLOCK);
694 local %SIG = (%SIG, %$sig) if !$sigfd;
695 if ($sigfd) { # TODO: use inotify/kqueue to detect unlinked sockets
696 PublicInbox::DS->SetLoopTimeout(5000);
698 # wake up every second to accept signals if we don't
699 # have signalfd or IO::KQueue:
700 PublicInbox::Sigfd::sig_setmask($oldset);
701 PublicInbox::DS->SetLoopTimeout(1000);
703 PublicInbox::DS->SetPostLoopCallback(sub {
704 my ($dmap, undef) = @_;
705 if (@st = defined($path) ? stat($path) : ()) {
706 if ($dev_ino_expect ne pack('dd', $st[0], $st[1])) {
707 warn "$path dev/ino changed, quitting\n";
710 } elsif (defined($path)) {
711 warn "stat($path): $!, quitting ...\n";
712 undef $path; # don't unlink
715 return 1 if defined($path);
718 for my $s (values %$dmap) {
719 $s->can('busy') or next;
720 if ($s->busy($now)) {
726 $n; # true: continue, false: stop
729 # STDIN was redirected to /dev/null above, closing STDOUT and
730 # STDERR will cause the calling `lei' client process to finish
731 # reading <$daemon> pipe.
732 open STDOUT, '>&STDIN' or die "redirect stdout failed: $!";
733 openlog($path, 'pid', 'user');
734 local $SIG{__WARN__} = sub { syslog('warning', "@_") };
736 my $on_destroy = PublicInbox::OnDestroy->new(sub {
737 syslog('crit', "$@") if $@ && $$ == $owner_pid;
739 open STDERR, '>&STDIN' or die "redirect stderr failed: $!";
740 # $daemon pipe to `lei' closed, main loop begins:
741 PublicInbox::DS->EventLoop;
742 @$on_destroy = (); # cancel on_destroy if we get here
743 exit($exit_code // 0);
746 # for users w/o IO::FDPass
749 my $exit = $main_pkg->can('exit'); # caller may override exit()
750 local $quit = $exit if $exit;
752 umask(077) // die("umask(077): $!");
758 }, __PACKAGE__), @ARGV);