1 # Copyright (C) 2020-2021 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 PublicInbox::LeiExternal
12 PublicInbox::LeiQuery);
14 use Socket qw(AF_UNIX SOCK_SEQPACKET MSG_EOR pack_sockaddr_un);
15 use Errno qw(EPIPE EAGAIN EINTR ECONNREFUSED ENOENT ECONNRESET);
17 use POSIX qw(strftime);
19 use Fcntl qw(SEEK_SET);
20 use PublicInbox::Config;
21 use PublicInbox::Syscall qw(SFD_NONBLOCK EPOLLIN EPOLLET);
22 use PublicInbox::Sigfd;
23 use PublicInbox::DS qw(now dwaitpid);
24 use PublicInbox::Spawn qw(spawn popen_rd);
25 use PublicInbox::Lock;
27 use Time::HiRes qw(stat); # ctime comparisons for config cache
28 use File::Path qw(mkpath);
30 our $quit = \&CORE::exit;
31 our ($current_lei, $errors_log, $listener, $oldset);
32 my ($recv_cmd, $send_cmd);
33 my $GLP = Getopt::Long::Parser->new;
34 $GLP->configure(qw(gnu_getopt no_ignore_case auto_abbrev));
35 my $GLP_PASS = Getopt::Long::Parser->new;
36 $GLP_PASS->configure(qw(gnu_getopt no_ignore_case auto_abbrev pass_through));
38 our %PATH2CFG; # persistent for socket daemon
40 # TBD: this is a documentation mechanism to show a subcommand
41 # (may) pass options through to another command:
42 sub pass_through { $GLP_PASS }
46 my ($spec, $re_str) = @_; # 'limit|n=i', '([0-9]+)'
47 my ($key) = ($spec =~ m/\A([a-z]+)/g);
48 my $cb = sub { # Getopt::Long "<>" catch-all handler
50 if ($arg =~ /\A-($re_str)\z/) {
52 } elsif ($arg eq '--') { # "--" arg separator, ignore first
53 push @{$OPT->{-argv}}, $arg if $OPT->{'--'}++;
54 # lone (single) dash is handled elsewhere
55 } elsif (substr($arg, 0, 1) eq '-') {
57 push @{$OPT->{-argv}}, $arg;
59 die "bad argument: $arg\n";
62 push @{$OPT->{-argv}}, $arg;
65 ($spec, '<>' => $cb, $GLP_PASS) # for Getopt::Long
68 # rel2abs preserves symlinks in parent, unlike abs_path
71 if (index($p, '/') == 0) { # already absolute
72 $p =~ tr!/!/!s; # squeeze redundant slashes
75 my $pwd = $self->{env}->{PWD};
78 my $xcwd = $self->{3} //
79 ($cwd = getcwd() // die "getcwd(PWD=$pwd): $!");
80 if (my @st_pwd = stat($pwd)) {
81 my @st_cwd = stat($xcwd) or die "stat($xcwd): $!";
82 "@st_pwd[1,0]" eq "@st_cwd[1,0]" or
83 $self->{env}->{PWD} = $pwd = undef;
84 } else { # PWD was invalid
85 $self->{env}->{PWD} = $pwd = undef;
88 $pwd //= $self->{env}->{PWD} = $cwd // getcwd() // die "getcwd: $!";
89 File::Spec->rel2abs($p, $pwd);
92 # abs_path resolves symlinks in parent iff all parents exist
93 sub abs_path { Cwd::abs_path($_[1]) // rel2abs(@_) }
95 sub share_path ($) { # $HOME/.local/share/lei/$FOO
97 rel2abs($self, ($self->{env}->{XDG_DATA_HOME} //
98 ($self->{env}->{HOME} // '/nonexistent').'/.local/share')
102 sub store_path ($) { share_path($_[0]) . '/store' }
104 sub _config_path ($) {
106 rel2abs($self, ($self->{env}->{XDG_CONFIG_HOME} //
107 ($self->{env}->{HOME} // '/nonexistent').'/.config')
113 rel2abs($self, ($self->{env}->{XDG_CACHE_HOME} //
114 ($self->{env}->{HOME} // '/nonexistent').'/.cache')
120 $self->{ale} //= do {
121 require PublicInbox::LeiALE;
122 $self->_lei_cfg(1)->{ale} //= PublicInbox::LeiALE->new($self);
127 # TODO: drop underscore variants everywhere, they're undocumented
128 qw(fsync|sync! jobs|j=i indexlevel|L=s compact
129 max_size|max-size=s sequential_shard|sequential-shard
130 batch_size|batch-size=s skip-docdata)
133 my @c_opt = qw(c=s@ C=s@ quiet|q);
134 my @lxs_opt = (qw(remote! local! external! include|I=s@ exclude=s@ only=s@
135 import-remote! no-torsocks torsocks=s),
136 PublicInbox::LeiQuery::curl_opt());
138 # we generate shell completion + help using %CMD and %OPTDESC,
139 # see lei__complete() and PublicInbox::LeiHelp
140 # command => [ positional_args, 1-line description, Getopt::Long option spec ]
141 our %CMD = ( # sorted in order of importance/use:
142 'q' => [ '--stdin|SEARCH_TERMS...', 'search for messages matching terms',
143 'stdin|', # /|\z/ must be first for lone dash
145 qw(save output|mfolder|o=s format|f=s dedupe|d=s threads|t+
146 sort|s=s reverse|r offset=i pretty jobs|j=s globoff|g augment|a
147 import-before! lock=s@ rsyncable alert=s@ mua=s verbose|v+
148 color!), @c_opt, opt_dash('limit|n=i', '[0-9]+') ],
150 'up' => [ 'OUTPUT|--all', 'update saved search',
151 qw(jobs|j=s lock=s@ alert=s@ mua=s verbose|v+ all:s), @c_opt ],
153 'lcat' => [ '--stdin|MSGID_OR_URL..', 'display local copy of message(s)',
154 'stdin|', # /|\z/ must be first for lone dash
155 # some of these options are ridiculous for lcat
156 @lxs_opt, qw(output|mfolder|o=s format|f=s dedupe|d=s threads|t+
157 sort|s=s reverse|r offset=i jobs|j=s globoff|g augment|a
158 import-before! lock=s@ rsyncable alert=s@ mua=s verbose|v+
159 color!), @c_opt, opt_dash('limit|n=i', '[0-9]+') ],
161 'blob' => [ 'OID', 'show a git blob, reconstructing from mail if necessary',
162 qw(git-dir=s@ cwd! verbose|v+ mail! oid-a|A=s path-a|a=s path-b|b=s),
165 'add-external' => [ 'LOCATION',
166 'add/set priority of a publicinbox|extindex for extra matches',
167 qw(boost=i mirror=s no-torsocks torsocks=s inbox-version=i
168 verbose|v+), @c_opt, index_opt(),
169 PublicInbox::LeiQuery::curl_opt() ],
170 'ls-external' => [ '[FILTER]', 'list publicinbox|extindex locations',
171 qw(format|f=s z|0 globoff|g invert-match|v local remote), @c_opt ],
172 'ls-label' => [ '', 'list labels', qw(z|0 stats:s), @c_opt ],
173 'ls-sync' => [ '', 'list sync folders',
174 qw(z|0 z|0 globoff|g invert-match|v local remote), @c_opt ],
175 'forget-external' => [ 'LOCATION...|--prune',
176 'exclude further results from a publicinbox|extindex',
179 'ls-search' => [ '[PREFIX]', 'list saved search queries',
180 qw(format|f=s pretty l ascii z|0), @c_opt ],
181 'forget-search' => [ 'OUTPUT', 'forget a saved search',
182 qw(verbose|v+), @c_opt ],
183 'edit-search' => [ 'OUTPUT', "edit saved search via `git config --edit'",
186 'plonk' => [ '--threads|--from=IDENT',
187 'exclude mail matching From: or threads from non-Message-ID searches',
188 qw(stdin| threads|t from|f=s mid=s oid=s), @c_opt ],
189 'tag' => [ 'KEYWORDS...',
190 'set/unset keywords and/or labels on message(s)',
191 qw(stdin| in-format|F=s input|i=s@ oid=s@ mid=s@), @c_opt,
192 pass_through('-kw:foo for delete') ],
193 'forget' => [ '[--stdin|--oid=OID|--by-mid=MID]',
194 "exclude message(s) on stdin from `q' search results",
195 qw(stdin| oid=s exact by-mid|mid:s), @c_opt ],
197 'purge-mailsource' => [ 'LOCATION|--all',
198 'remove imported messages from IMAP, Maildirs, and MH',
199 qw(exact! all jobs:i indexed), @c_opt ],
201 'add-watch' => [ 'LOCATION', 'watch for new messages and flag changes',
202 qw(import! kw! interval=s recursive|r
203 exclude=s include=s), @c_opt ],
204 'ls-watch' => [ '[FILTER...]', 'list active watches with numbers and status',
205 qw(format|f=s z), @c_opt ],
206 'pause-watch' => [ '[WATCH_NUMBER_OR_FILTER]', qw(all local remote), @c_opt ],
207 'resume-watch' => [ '[WATCH_NUMBER_OR_FILTER]', qw(all local remote), @c_opt ],
208 'forget-watch' => [ '{WATCH_NUMBER|--prune}', 'stop and forget a watch',
211 'import' => [ 'LOCATION...|--stdin',
212 'one-time import/update from URL or filesystem',
213 qw(stdin| offset=i recursive|r exclude=s include|I=s
214 lock=s@ in-format|F=s kw! verbose|v+ incremental! sync!), @c_opt ],
215 'convert' => [ 'LOCATION...|--stdin',
216 'one-time conversion from URL or filesystem to another format',
217 qw(stdin| in-format|F=s out-format|f=s output|mfolder|o=s
218 lock=s@ kw!), @c_opt ],
219 'p2q' => [ 'FILE|COMMIT_OID|--stdin',
220 "use a patch to generate a query for `lei q --stdin'",
221 qw(stdin| want|w=s@ uri debug), @c_opt ],
222 'config' => [ '[...]', sub {
223 'git-config(1) wrapper for '._config_path($_[0]);
224 }, qw(config-file|system|global|file|f=s), # for conflict detection
225 qw(c=s@ C=s@), pass_through('git config') ],
226 'inspect' => [ 'ITEMS...', 'inspect lei/store and/or local external',
227 qw(pretty ascii dir=s), @c_opt ],
229 'init' => [ '[DIRNAME]', sub {
230 "initialize storage, default: ".store_path($_[0]);
232 'daemon-kill' => [ '[-SIGNAL]', 'signal the lei-daemon',
233 # "-C DIR" conflicts with -CHLD, here, and chdir makes no sense, here
234 opt_dash('signal|s=s', '[0-9]+|(?:[A-Z][A-Z0-9]+)') ],
235 'daemon-pid' => [ '', 'show the PID of the lei-daemon' ],
236 'help' => [ '[SUBCOMMAND]', 'show help' ],
238 # XXX do we need this?
239 # 'git' => [ '[ANYTHING...]', 'git(1) wrapper', pass_through('git') ],
241 'reorder-local-store-and-break-history' => [ '[REFNAME]',
242 'rewrite git history in an attempt to improve compression',
245 # internal commands are prefixed with '_'
246 '_complete' => [ '[...]', 'internal shell completion helper',
247 pass_through('everything') ],
250 # switch descriptions, try to keep consistent across commands
251 # $spec: Getopt::Long option specification
252 # $spec => [@ALLOWED_VALUES (default is first), $description],
253 # $spec => $description
254 # "$SUB_COMMAND TAB $spec" => as above
255 my $stdin_formats = [ 'MAIL_FORMAT|eml|mboxrd|mboxcl2|mboxcl|mboxo',
256 'specify message input format' ];
257 my $ls_format = [ 'OUT|plain|json|null', 'listing output format' ];
259 # we use \x{a0} (non-breaking SP) to avoid wrapping in PublicInbox::LeiHelp
261 'help|h' => 'show this built-in help',
262 'c=s@' => [ 'NAME=VALUE', 'set config option' ],
263 'C=s@' => [ 'DIR', 'chdir to specify to directory' ],
264 'quiet|q' => 'be quiet',
265 'lock=s@' => [ 'METHOD|dotlock|fcntl|flock|none',
266 'mbox(5) locking method(s) to use (default: fcntl,dotlock)' ],
268 'incremental! import' => 'import already seen IMAP and NNTP articles',
269 'globoff|g' => "do not match locations using '*?' wildcards ".
270 "and\xa0'[]'\x{a0}ranges",
271 'color!' => 'disable color (for --format=text)',
272 'verbose|v+' => 'be more verbose',
273 'external!' => 'do not use externals',
274 'mail!' => 'do not look in mail storage for OID',
275 'cwd!' => 'do not look in git repo of current working directory',
276 'oid-a|A=s' => 'pre-image OID',
277 'path-a|a=s' => 'pre-image pathname associated with OID',
278 'path-b|b=s' => 'post-image pathname associated with OID',
279 'git-dir=s@' => 'additional git repository to scan',
280 'torsocks=s' => ['VAL|auto|no|yes',
281 'whether or not to wrap git and curl commands with torsocks'],
282 'no-torsocks' => 'alias for --torsocks=no',
283 'save' => "save a search for `lei up'",
284 'import-remote!' => 'do not memoize remote messages into local store',
286 'type=s' => [ 'any|mid|git', 'disambiguate type' ],
288 'dedupe|d=s' => ['STRATEGY|content|oid|mid|none',
289 'deduplication strategy'],
291 'return all messages in the same threads as the actual match(es)',
293 'want|w=s@' => [ 'PREFIX|dfpost|dfn', # common ones in help...
294 'search prefixes to extract (default: dfpost7)' ],
296 'alert=s@' => ['CMD,:WINCH,:bell,<any command>',
297 'run command(s) or perform ops when done writing to output ' .
298 '(default: ":WINCH,:bell" with --mua and Maildir/IMAP output, ' .
299 'nothing otherwise)' ],
301 'augment|a' => 'augment --output destination instead of clobbering',
303 'output|mfolder|o=s' => [ 'MFOLDER',
304 "destination (e.g.\xa0`/path/to/Maildir', ".
305 "or\xa0`-'\x{a0}for\x{a0}stdout)" ],
307 "MUA to run on --output Maildir or mbox (e.g.\xa0`mutt\xa0-f\xa0%f')" ],
309 'inbox-version=i' => [ 'NUM|1|2',
310 'force a public-inbox version with --mirror'],
311 'mirror=s' => [ 'URL', 'mirror a public-inbox'],
313 # public-inbox-index options
314 'fsync!' => 'speed up indexing after --mirror, risk index corruption',
315 'compact' => 'run compact index after mirroring',
316 'indexlevel|L=s' => [ 'LEVEL|full|medium|basic',
317 "indexlevel with --mirror (default: full)" ],
318 'max_size|max-size=s' => [ 'SIZE',
319 'do not index messages larger than SIZE (default: infinity)' ],
320 'batch_size|batch-size=s' => [ 'SIZE',
321 'flush changes to OS after given number of bytes (default: 1m)' ],
322 'sequential_shard|sequential-shard' =>
323 'index Xapian shards sequentially for slow storage',
325 'drop compatibility w/ public-inbox <1.6 to save ~1.5% space',
328 'OUT|maildir|mboxrd|mboxcl2|mboxcl|mboxo|html|json|jsonl|concatjson',
329 'specify output format, default depends on --output'],
330 'exclude=s@ q' => [ 'LOCATION',
331 'exclude specified external(s) from search' ],
332 'include|I=s@ q' => [ 'LOCATION',
333 'include specified external(s) in search' ],
334 'only=s@ q' => [ 'LOCATION',
335 'only use specified external(s) for search' ],
336 'jobs=s q' => [ '[SEARCH_JOBS][,WRITER_JOBS]',
337 'control number of search and writer jobs' ],
338 'jobs|j=i add-external' => 'set parallelism when indexing after --mirror',
340 'in-format|F=s' => $stdin_formats,
341 'format|f=s ls-search' => ['OUT|json|jsonl|concatjson',
342 'listing output format' ],
343 'l ls-search' => 'long listing format',
344 'format|f=s ls-external' => $ls_format,
346 'limit|n=i@' => ['NUM', 'limit on number of matches (default: 10000)' ],
347 'offset=i' => ['OFF', 'search result offset (default: 0)'],
349 'sort|s=s' => [ 'VAL|received|relevance|docid',
350 "order of results is `--output'-dependent"],
351 'reverse|r' => 'reverse search results', # like sort(1)
353 'boost=i' => 'increase/decrease priority of results (default: 0)',
355 'local' => 'limit operations to the local filesystem',
356 'local!' => 'exclude results from the local filesystem',
357 'remote' => 'limit operations to those requiring network access',
358 'remote!' => 'prevent operations requiring network access',
360 'all:s up' => ['local', 'update all (local) saved searches' ],
362 'mid=s' => 'specify the Message-ID of a message',
363 'oid=s' => 'specify the git object ID of a message',
365 'recursive|r' => 'scan directories/mailboxes/newsgroups recursively',
366 'exclude=s' => 'exclude mailboxes/newsgroups based on pattern',
367 'include=s' => 'include mailboxes/newsgroups based on pattern',
369 'exact' => 'operate on exact header matches only',
370 'exact!' => 'rely on content match instead of exact header matches',
372 'by-mid|mid:s' => [ 'MID', 'match only by Message-ID, ignoring contents' ],
374 'kw!' => 'disable/enable importing keywords (aka "flags")',
376 # xargs, env, use "-0", git(1) uses "-z". We support z|0 everywhere
377 'z|0' => 'use NUL \\0 instead of newline (CR) to delimit lines',
379 'signal|s=s' => [ 'SIG', 'signal to send lei-daemon (default: TERM)' ],
383 'leistore.dir' => 'top-level storage location',
386 my @WQ_KEYS = qw(lxs l2m wq1); # internal workers
390 for my $wq (grep(defined, delete(@$self{@WQ_KEYS}))) { $wq->DESTROY }
393 # pronounced "exit": x_it(1 << 8) => exit(1); x_it(13) => SIGPIPE
395 my ($self, $code) = @_;
396 # make sure client sees stdout before exit
397 $self->{1}->autoflush(1) if $self->{1};
398 dump_and_clear_log();
399 if (my $s = $self->{pkt_op_p} // $self->{sock}) {
400 send($s, "x_it $code", MSG_EOR);
401 } elsif ($self->{oneshot}) {
402 # don't want to end up using $? from child processes
404 # cleanup anything that has tempfiles or open file handles
406 delete @$self{qw(ovv dedupe sto cfg)};
407 if (my $signum = ($code & 127)) { # usually SIGPIPE (13)
408 $SIG{PIPE} = 'DEFAULT'; # $SIG{$signum} doesn't work
410 sleep(1) while 1; # wait for signal
414 } # else ignore if client disconnected
419 my $err = $self->{2} // ($self->{pgr} // [])->[2] // *STDERR{GLOB};
420 my @eor = (substr($_[-1]//'', -1, 1) eq "\n" ? () : ("\n"));
421 print $err @_, @eor and return;
422 my $old_err = delete $self->{2};
423 close($old_err) if $! == EPIPE && $old_err;
424 $err = $self->{2} = ($self->{pgr} // [])->[2] // *STDERR{GLOB};
425 print $err @_, @eor or print STDERR @_, @eor;
428 sub qerr ($;@) { $_[0]->{opt}->{quiet} or err(shift, @_) }
430 sub fail_handler ($;$$) {
431 my ($lei, $code, $io) = @_;
432 close($io) if $io; # needed to avoid warnings on SIGPIPE
434 x_it($lei, $code // (1 << 8));
437 sub sigpipe_handler { # handles SIGPIPE from @WQ_KEYS workers
438 fail_handler($_[0], 13, delete $_[0]->{1});
441 # PublicInbox::OnDestroy callback for SIGINT to take out the entire pgid
444 dwaitpid($pgid) if kill('-INT', $pgid);
448 my ($self, $buf, $exit_code) = @_;
449 err($self, $buf) if defined $buf;
450 # calls fail_handler:
451 send($self->{pkt_op_p}, '!', MSG_EOR) if $self->{pkt_op_p};
452 x_it($self, ($exit_code // 1) << 8);
458 return if print { $self->{1} // return } @_; # likely
459 return note_sigpipe($self, 1) if $! == EPIPE;
460 my $err = "error writing to output: $!";
465 sub puts ($;@) { out(shift, map { "$_\n" } @_) }
467 sub child_error { # passes non-fatal curl exit codes to user
468 my ($self, $child_error, $msg) = @_; # child_error is $?
469 $self->err($msg) if $msg;
470 if (my $s = $self->{pkt_op_p} // $self->{sock}) {
471 # send to the parent lei-daemon or to lei(1) client
472 send($s, "child_error $child_error", MSG_EOR);
473 } elsif (!$PublicInbox::DS::in_loop) {
474 $self->{child_error} = $child_error;
475 } # else noop if client disconnected
478 sub note_sigpipe { # triggers sigpipe_handler
479 my ($self, $fd) = @_;
480 close(delete($self->{$fd})); # explicit close silences Perl warning
481 send($self->{pkt_op_p}, '|', MSG_EOR) if $self->{pkt_op_p};
485 sub _lei_atfork_child {
486 my ($self, $persist) = @_;
487 # we need to explicitly close things which are on stack
489 chdir '/' or die "chdir(/): $!";
490 close($_) for (grep(defined, delete @$self{qw(0 1 2 sock)}));
491 if (my $cfg = $self->{cfg}) {
492 delete $cfg->{-lei_store};
494 } else { # worker, Net::NNTP (Net::Cmd) uses STDERR directly
495 open STDERR, '+>&='.fileno($self->{2}) or warn "open $!";
497 close($_) for (grep(defined, delete @$self{qw(3 old_1 au_done)}));
498 if (my $op_c = delete $self->{pkt_op_c}) {
499 close(delete $op_c->{sock});
501 if (my $pgr = delete $self->{pgr}) {
502 close($_) for (@$pgr[1,2]);
504 close $listener if $listener;
508 $quit = \&CORE::exit;
509 $self->{-eml_noisy} or # only "lei import" sets this atm
510 $SIG{__WARN__} = PublicInbox::Eml::warn_ignore_cb();
511 $current_lei = $persist ? undef : $self; # for SIG{__WARN__}
514 sub _delete_pkt_op { # OnDestroy callback to prevent leaks on die
516 if (my $op = delete $self->{pkt_op_c}) { # in case of die
517 $op->close; # PublicInbox::PktOp::close
519 my $unclosed_after_die = delete($self->{pkt_op_p}) or return;
520 close $unclosed_after_die;
525 require PublicInbox::OnDestroy;
526 require PublicInbox::PktOp;
527 my $end = PublicInbox::OnDestroy->new($$, \&_delete_pkt_op, $self);
528 @$self{qw(pkt_op_c pkt_op_p)} = PublicInbox::PktOp->pair;
533 my ($lei, $wq, $ident, $jobs, $ops) = @_;
535 '!' => [ \&fail_handler, $lei ],
536 '|' => [ \&sigpipe_handler, $lei ],
537 'x_it' => [ \&x_it, $lei ],
538 'child_error' => [ \&child_error, $lei ],
541 $ops->{''} //= [ $wq->can('_lei_wq_eof') || \&wq_eof, $lei ];
542 my $end = $lei->pkt_op_pair;
543 $wq->wq_workers_start($ident, $jobs, $lei->oldset, { lei => $lei });
544 delete $lei->{pkt_op_p};
545 my $op_c = delete $lei->{pkt_op_c};
547 $lei->event_step_init;
552 require PublicInbox::LeiHelp;
553 PublicInbox::LeiHelp::call($_[0], $_[1], \%CMD, \%OPTDESC);
557 my ($self, $cmd, $argv) = @_;
558 # allow _complete --help to complete, not show help
559 return 1 if substr($cmd, 0, 1) eq '_';
561 $OPT = $self->{opt} //= {};
562 my $info = $CMD{$cmd} // [ '[...]' ];
563 my ($proto, undef, @spec) = @$info;
564 my $glp = ref($spec[-1]) eq ref($GLP) ? pop(@spec) : $GLP;
565 push @spec, qw(help|h);
567 if ($spec[0] =~ s/\|\z//s) { # "stdin|" or "clear|" allows "-" alias
568 $lone_dash = $spec[0];
569 $OPT->{$spec[0]} = \(my $var);
570 push @spec, '' => \$var;
572 $glp->getoptionsfromarray($argv, $OPT, @spec) or
573 return _help($self, "bad arguments or options for $cmd");
574 return _help($self) if $OPT->{help};
576 push @$argv, @{$OPT->{-argv}} if defined($OPT->{-argv});
578 # "-" aliases "stdin" or "clear"
579 $OPT->{$lone_dash} = ${$OPT->{$lone_dash}} if defined $lone_dash;
582 my $POS_ARG = '[A-Z][A-Z0-9_]+';
584 my @args = split(/ /, $proto);
585 for my $var (@args) {
586 if ($var =~ /\A$POS_ARG\.\.\.\z/o) { # >= 1 args;
587 $inf = defined($argv->[$i]) and last;
588 $var =~ s/\.\.\.\z//;
589 $err = "$var not supplied";
590 } elsif ($var =~ /\A$POS_ARG\z/o) { # required arg at $i
591 $argv->[$i++] // ($err = "$var not supplied");
592 } elsif ($var =~ /\.\.\.\]\z/) { # optional args start
595 } elsif ($var =~ /\A\[-?$POS_ARG\]\z/) { # one optional arg
597 } elsif ($var =~ /\A.+?\|/) { # required FOO|--stdin
598 $inf = 1 if index($var, '...') > 0;
599 my @or = split(/\|/, $var);
602 if ($o =~ /\A--([a-z0-9\-]+)/) {
603 $ok = defined($OPT->{$1});
605 } elsif (defined($argv->[$i])) {
609 } # else continue looping
613 $err = join(', ', @or) . " or $last must be set";
615 warn "BUG: can't parse `$var' in $proto";
619 if (!$inf && scalar(@$argv) > scalar(@args)) {
620 $err //= 'too many arguments';
622 $err ? fail($self, "usage: lei $cmd $proto\nE: $err") : 1;
625 sub _tmp_cfg { # for lei -c <name>=<value> ...
627 my $cfg = _lei_cfg($self, 1);
629 my $ft = File::Temp->new(TEMPLATE => 'lei_cfg-XXXX', TMPDIR => 1);
630 my $tmp = { '-f' => $ft->filename, -tmp => $ft };
632 print $ft <<EOM or return fail($self, "$tmp->{-f}: $!");
636 $tmp = $self->{cfg} = bless { %$cfg, %$tmp }, ref($cfg);
637 for (@{$self->{opt}->{c}}) {
638 /\A([^=\.]+\.[^=]+)(?:=(.*))?\z/ or return fail($self, <<EOM);
639 `-c $_' is not of the form -c <name>=<value>'
643 _config($self, '--add', $name, $value);
644 if (defined(my $v = $tmp->{$name})) {
645 if (ref($v) eq 'ARRAY') {
648 $tmp->{$name} = [ $v, $value ];
651 $tmp->{$name} = $value;
657 my ($self, $cmd, $pfx) = @_;
661 $cb = $self->can($pfx.$ucmd) and return $cb;
663 $base =~ s/_([a-z])/\u$1/g;
664 my $pkg = "PublicInbox::Lei\u$base";
665 ($INC{"PublicInbox/Lei\u$base.pm"} // eval("require $pkg")) ?
666 $pkg->can($pfx.$ucmd) : undef;
670 my ($self, $cmd, @argv) = @_;
671 local $current_lei = $self; # for __WARN__
672 dump_and_clear_log("from previous run\n");
673 return _help($self, 'no command given') unless defined($cmd);
674 # do not support Getopt bundling for this
675 while ($cmd eq '-C' || $cmd eq '-c') {
676 my $v = shift(@argv) // return fail($self, $cmd eq '-C' ?
677 '-C DIRECTORY' : '-c <name>=<value>');
678 push @{$self->{opt}->{substr($cmd, 1, 1)}}, $v;
679 $cmd = shift(@argv) // return _help($self, 'no command given');
681 if (my $cb = lazy_cb(__PACKAGE__, $cmd, 'lei_')) {
682 optparse($self, $cmd, \@argv) or return;
683 $self->{opt}->{c} and (_tmp_cfg($self) // return);
684 if (my $chdir = $self->{opt}->{C}) {
685 for my $d (@$chdir) {
686 next if $d eq ''; # same as git(1)
687 chdir $d or return fail($self, "cd $d: $!");
689 if (delete $self->{3}) { # update cwd for rel2abs
690 opendir my $dh, '.' or
691 return fail($self, "opendir . $!");
696 } elsif (grep(/\A-/, $cmd, @argv)) { # --help or -h only
697 $GLP->getoptionsfromarray([$cmd, @argv], {}, qw(help|h C=s@))
698 or return _help($self, 'bad arguments or options');
701 fail($self, "`$cmd' is not an lei command");
706 my ($self, $creat) = @_;
707 return $self->{cfg} if $self->{cfg};
708 my $f = _config_path($self);
710 my $cur_st = @st ? pack('dd', $st[10], $st[7]) : ''; # 10:ctime, 7:size
712 if (my $cfg = $PATH2CFG{$f}) { # reuse existing object in common case
713 return ($self->{cfg} = $cfg) if $cur_st eq $cfg->{-st};
714 ($sto, $sto_dir) = @$cfg{qw(-lei_store leistore.dir)};
719 return bless {}, 'PublicInbox::Config';
721 my (undef, $cfg_dir, undef) = File::Spec->splitpath($f);
722 -d $cfg_dir or mkpath($cfg_dir) or die "mkpath($cfg_dir): $!\n";
723 open my $fh, '>>', $f or die "open($f): $!\n";
724 @st = stat($fh) or die "fstat($f): $!\n";
725 $cur_st = pack('dd', $st[10], $st[7]);
726 qerr($self, "# $f created") if $self->{cmd} ne 'config';
728 my $cfg = PublicInbox::Config->git_config_dump($f);
729 $cfg->{-st} = $cur_st;
731 if ($sto && File::Spec->canonpath($sto_dir // store_path($self))
732 eq File::Spec->canonpath($cfg->{'leistore.dir'} //
733 store_path($self))) {
734 $cfg->{-lei_store} = $sto;
736 if (scalar(keys %PATH2CFG) > 5) {
737 # FIXME: use inotify/EVFILT_VNODE to detect unlinked configs
738 for my $k (keys %PATH2CFG) {
739 delete($PATH2CFG{$k}) unless -f $k
742 $self->{cfg} = $PATH2CFG{$f} = $cfg;
745 sub _lei_store ($;$) {
746 my ($self, $creat) = @_;
747 my $cfg = _lei_cfg($self, $creat);
748 $cfg->{-lei_store} //= do {
749 require PublicInbox::LeiStore;
750 my $dir = $cfg->{'leistore.dir'} // store_path($self);
751 return unless $creat || -d $dir;
752 PublicInbox::LeiStore->new($dir, { creat => $creat });
757 my ($self, @argv) = @_;
758 my %env = (%{$self->{env}}, GIT_CONFIG => undef);
759 my $cfg = _lei_cfg($self, 1);
760 my $cmd = [ qw(git config -f), $cfg->{'-f'}, @argv ];
761 my %rdr = map { $_ => $self->{$_} } (0..2);
762 waitpid(spawn($cmd, \%env, \%rdr), 0);
766 my ($self, @argv) = @_;
767 $self->{opt}->{'config-file'} and return fail $self,
768 "config file switches not supported by `lei config'";
770 x_it($self, $?) if $?;
773 sub lei_daemon_pid { puts shift, $$ }
775 sub lei_daemon_kill {
777 my $sig = $self->{opt}->{signal} // 'TERM';
778 kill($sig, $$) or fail($self, "kill($sig, $$): $!");
781 # Shell completion helper. Used by lei-completion.bash and hopefully
782 # other shells. Try to do as much here as possible to avoid redundancy
783 # and improve maintainability.
785 my ($self, @argv) = @_; # argv = qw(lei and any other args...)
786 shift @argv; # ignore "lei", the entire command is sent
787 @argv or return puts $self, grep(!/^_/, keys %CMD), qw(--help -h -C);
788 my $cmd = shift @argv;
789 my $info = $CMD{$cmd} // do { # filter matching commands
790 @argv or puts $self, grep(/\A\Q$cmd\E/, keys %CMD);
793 my ($proto, undef, @spec) = @$info;
795 my $re = defined($cur) ? qr/\A\Q$cur\E/ : qr/./;
796 if (substr(my $_cur = $cur // '-', 0, 1) eq '-') { # --switches
797 # gross special case since the only git-config options
798 # Consider moving to a table if we need more special cases
799 # we use Getopt::Long for are the ones we reject, so these
800 # are the ones we don't reject:
801 if ($cmd eq 'config') {
802 puts $self, grep(/$re/, keys %CONFIG_KEYS);
803 @spec = qw(add z|null get get-all unset unset-all
804 replace-all get-urlmatch
805 remove-section rename-section
806 name-only list|l edit|e
807 get-color-name get-colorbool);
810 # generate short/long names from Getopt::Long specs
811 puts $self, grep(/$re/, qw(--help -h -C), map {
812 if (s/[:=].+\z//) { # req/optional args, e.g output|o=i
813 } elsif (s/\+\z//) { # verbose|v+
815 # negation: mail! => no-mail|mail
816 s/([\w\-]+)/$1|no-$1/g
819 my $x = length > 1 ? "--$_" : "-$_";
820 $x eq $_cur ? () : $x;
821 } grep(!/_/, split(/\|/, $_, -1)) # help|h
822 } grep { $OPTDESC{"$_\t$cmd"} || $OPTDESC{$_} } @spec);
823 } elsif ($cmd eq 'config' && !@argv && !$CONFIG_KEYS{$cur}) {
824 puts $self, grep(/$re/, keys %CONFIG_KEYS);
827 # switch args (e.g. lei q -f mbox<TAB>)
828 if (($argv[-1] // $cur // '') =~ /\A--?([\w\-]+)\z/) {
829 my $opt = quotemeta $1;
831 my $v = $OPTDESC{$_};
832 my @v = ref($v) ? split(/\|/, $v->[0]) : ();
833 # get rid of ALL CAPS placeholder (e.g "OUT")
834 # (TODO: completion for external paths)
835 shift(@v) if scalar(@v) && uc($v[0]) eq $v[0];
837 } grep(/\A(?:[\w-]+\|)*$opt\b.*?(?:\t$cmd)?\z/, keys %OPTDESC);
839 if (my $cb = lazy_cb($self, $cmd, '_complete_')) {
840 puts $self, $cb->($self, @argv, $cur ? ($cur) : ());
842 # TODO: URLs, pathnames, OIDs, MIDs, etc... See optparse() for
847 my ($argv, $env) = @_;
848 my $argc = scalar @$argv;
849 my $buf = 'exec '.join("\0", scalar(@$argv), @$argv);
850 while (my ($k, $v) = each %$env) { $buf .= "\0$k=$v" };
856 my $mua = $self->{opt}->{mua} // return;
857 my $mfolder = $self->{ovv}->{dst};
858 my (@cmd, $replaced);
859 if ($mua =~ /\A(?:mutt|mailx|mail|neomutt)\z/) {
861 # TODO: help wanted: other common FOSS MUAs
863 require Text::ParseWords;
864 @cmd = Text::ParseWords::shellwords($mua);
865 # mutt uses '%f' for open-hook with compressed mbox, we follow
866 @cmd = map { $_ eq '%f' ? ($replaced = $mfolder) : $_ } @cmd;
868 push @cmd, $mfolder unless defined($replaced);
869 if ($self->{sock}) { # lei(1) client process runs it
870 # restore terminal: echo $query | lei q -stdin --mua=...
872 $io->[0] = $self->{1} if $self->{opt}->{stdin} && -t $self->{1};
873 send_exec_cmd($self, $io, \@cmd, {});
874 } elsif ($self->{oneshot}) {
875 my $pid = fork // die "fork: $!";
876 if ($pid > 0) { # original process
877 if ($self->{opt}->{stdin} && -t STDOUT) {
878 open STDIN, '+<&', \*STDOUT or die "dup2: $!";
881 warn "exec @cmd: $!\n";
884 POSIX::setsid() > 0 or die "setsid: $!";
886 if ($self->{lxs} && $self->{au_done}) { # kick wait_startq
887 syswrite($self->{au_done}, 'q' x ($self->{lxs}->{jobs} // 0));
889 return unless -t $self->{2}; # XXX how to determine non-TUI MUAs?
890 $self->{opt}->{quiet} = 1;
891 delete $self->{-progress};
892 delete $self->{opt}->{verbose};
895 sub send_exec_cmd { # tell script/lei to execute a command
896 my ($self, $io, $cmd, $env) = @_;
897 my $sock = $self->{sock} // die 'lei client gone';
898 my $fds = [ map { fileno($_) } @$io ];
899 $send_cmd->($sock, $fds, exec_buf($cmd, $env), MSG_EOR);
902 sub poke_mua { # forces terminal MUAs to wake up and hopefully notice new mail
904 my $alerts = $self->{opt}->{alert} // return;
905 while (my $op = shift(@$alerts)) {
906 if ($op eq ':WINCH') {
907 # hit the process group that started the MUA
909 send($self->{sock}, '-WINCH', MSG_EOR);
910 } elsif ($self->{oneshot}) {
913 } elsif ($op eq ':bell') {
915 } elsif ($op =~ /(?<!\\),/) { # bare ',' (not ',,')
916 push @$alerts, split(/(?<!\\),/, $op);
917 } elsif ($op =~ m!\A([/a-z0-9A-Z].+)!) {
918 my $cmd = $1; # run an arbitrary command
919 require Text::ParseWords;
920 $cmd = [ Text::ParseWords::shellwords($cmd) ];
921 if (my $s = $self->{sock}) {
922 send($s, exec_buf($cmd, {}), MSG_EOR);
923 } elsif ($self->{oneshot}) {
924 $self->{"pid.$self.$$"}->{spawn($cmd)} = $cmd;
927 err($self, "W: unsupported --alert=$op"); # non-fatal
932 my %path_to_fd = ('/dev/stdin' => 0, '/dev/stdout' => 1, '/dev/stderr' => 2);
933 $path_to_fd{"/dev/fd/$_"} = $_ for (0..2);
935 # this also normalizes the path
937 my ($self, $path) = @_;
938 $path = rel2abs($self, $path);
940 $path_to_fd{$path} // (
941 ($path =~ m!\A/(?:dev|proc/self)/fd/[0-9]+\z!) ?
942 fail($self, "cannot open $path from daemon") : -1
946 # caller needs to "-t $self->{1}" to check if tty
949 my $fh = popen_rd([qw(git var GIT_PAGER)]);
950 chomp(my $pager = <$fh> // '');
951 close($fh) or warn "`git var PAGER' error: \$?=$?";
952 return if $pager eq 'cat' || $pager eq '';
953 my $new_env = { LESS => 'FRX', LV => '-c' };
954 $new_env->{MORE} = 'FRX' if $^O eq 'freebsd';
955 pipe(my ($r, $wpager)) or return warn "pipe: $!";
956 my $rdr = { 0 => $r, 1 => $self->{1}, 2 => $self->{2} };
957 my $pgr = [ undef, @$rdr{1, 2} ];
958 my $env = $self->{env};
959 if ($self->{sock}) { # lei(1) process runs it
960 delete @$new_env{keys %$env}; # only set iff unset
961 send_exec_cmd($self, [ @$rdr{0..2} ], [$pager], $new_env);
962 } elsif ($self->{oneshot}) {
964 $self->{"pid.$self.$$"}->{spawn($cmd, $new_env, $rdr)} = $cmd;
966 die 'BUG: start_pager w/o socket';
968 $self->{1} = $wpager;
969 $self->{2} = $wpager if -t $self->{2};
970 $env->{GIT_PAGER_IN_USE} = 'true'; # we may spawn git
976 my $pgr = delete($self->{pgr}) or return;
977 $self->{2} = $pgr->[2];
978 # do not restore original stdout, just close it so we error out
979 close(delete($self->{1})) if $self->{1};
982 sub accept_dispatch { # Listener {post_accept} callback
983 my ($sock) = @_; # ignore other
985 my $self = bless { sock => $sock }, __PACKAGE__;
986 vec(my $rvec = '', fileno($sock), 1) = 1;
987 select($rvec, undef, undef, 60) or
988 return send($sock, 'timed out waiting to recv FDs', MSG_EOR);
989 # (4096 * 33) >MAX_ARG_STRLEN
990 my @fds = $recv_cmd->($sock, my $buf, 4096 * 33) or return; # EOF
991 if (!defined($fds[0])) {
992 warn(my $msg = "recv_cmd failed: $!");
993 return send($sock, $msg, MSG_EOR);
997 open($self->{$i++}, '+<&=', $fd) and next;
998 send($sock, "open(+<&=$fd) (FD=$i): $!", MSG_EOR);
1000 $i == 4 or return send($sock, 'not enough FDs='.($i-1), MSG_EOR)
1002 $self->{2}->autoflush(1); # keep stdout buffered until x_it|DESTROY
1003 # $ENV_STR = join('', map { "\0$_=$ENV{$_}" } keys %ENV);
1004 # $buf = "$argc\0".join("\0", @ARGV).$ENV_STR."\0\0";
1005 substr($buf, -2, 2, '') eq "\0\0" or # s/\0\0\z//
1006 return send($sock, 'request command truncated', MSG_EOR);
1007 my ($argc, @argv) = split(/\0/, $buf, -1);
1009 my %env = map { split(/=/, $_, 2) } splice(@argv, $argc);
1010 if (chdir($self->{3})) {
1012 $self->{env} = \%env;
1013 eval { dispatch($self, @argv) };
1014 send($sock, $@, MSG_EOR) if $@;
1016 send($sock, "fchdir: $!", MSG_EOR); # implicit close
1022 delete $self->{-progress};
1024 close(delete $self->{1}) if $self->{1}; # may reap_compress
1025 $self->close if $self->{-event_init_done}; # PublicInbox::DS::close
1028 # for long-running results
1031 local %ENV = %{$self->{env}};
1032 my $sock = $self->{sock};
1033 local $current_lei = $self;
1035 while (my @fds = $recv_cmd->($sock, my $buf, 4096)) {
1036 if (scalar(@fds) == 1 && !defined($fds[0])) {
1037 return if $! == EAGAIN;
1038 next if $! == EINTR;
1039 last if $! == ECONNRESET;
1043 open my $rfh, '+<&=', $fd;
1045 die "unrecognized client signal: $buf";
1050 eval { $self->fail($err) };
1055 sub event_step_init {
1057 return if $self->{-event_init_done}++;
1058 if (my $sock = $self->{sock}) { # using DS->EventLoop
1059 $self->SUPER::new($sock, EPOLLIN|EPOLLET);
1065 sub oldset { $oldset }
1067 sub dump_and_clear_log {
1068 if (defined($errors_log) && -s STDIN && seek(STDIN, 0, SEEK_SET)) {
1070 unshift(@pfx, "$errors_log ") if @pfx;
1071 warn @pfx, do { local $/; <STDIN> };
1072 truncate(STDIN, 0) or warn "ftruncate ($errors_log): $!";
1076 # lei(1) calls this when it can't connect
1078 my ($path, $errno, $narg) = @_;
1079 local ($errors_log, $listener);
1080 ($errors_log) = ($path =~ m!\A(.+?/)[^/]+\z!);
1081 $errors_log .= 'errors.log';
1082 my $addr = pack_sockaddr_un($path);
1083 my $lk = bless { lock_path => $errors_log }, 'PublicInbox::Lock';
1085 socket($listener, AF_UNIX, SOCK_SEQPACKET, 0) or die "socket: $!";
1086 if ($errno == ECONNREFUSED || $errno == ENOENT) {
1087 return if connect($listener, $addr); # another process won
1088 if ($errno == ECONNREFUSED && -S $path) {
1089 unlink($path) or die "unlink($path): $!";
1092 $! = $errno; # allow interpolation to stringify in die
1093 die "connect($path): $!";
1095 umask(077) // die("umask(077): $!");
1096 bind($listener, $addr) or die "bind($path): $!";
1097 listen($listener, 1024) or die "listen: $!";
1100 my @st = stat($path) or die "stat($path): $!";
1101 my $dev_ino_expect = pack('dd', $st[0], $st[1]); # dev+ino
1102 local $oldset = PublicInbox::DS::block_signals();
1104 $send_cmd = PublicInbox::Spawn->can('send_cmd4');
1105 $recv_cmd = PublicInbox::Spawn->can('recv_cmd4') // do {
1106 require PublicInbox::CmdIPC4;
1107 $send_cmd = PublicInbox::CmdIPC4->can('send_cmd4');
1108 PublicInbox::CmdIPC4->can('recv_cmd4');
1111 $recv_cmd or die <<"";
1112 (Socket::MsgHdr || Inline::C) missing/unconfigured (narg=$narg);
1114 require PublicInbox::Listener;
1115 require PublicInbox::EOFpipe;
1116 (-p STDOUT) or die "E: stdout must be a pipe\n";
1117 open(STDIN, '+>>', $errors_log) or die "open($errors_log): $!";
1118 STDIN->autoflush(1);
1119 dump_and_clear_log("from previous daemon process:\n");
1120 POSIX::setsid() > 0 or die "setsid: $!";
1121 my $pid = fork // die "fork: $!";
1123 $0 = "lei-daemon $path";
1125 $listener->blocking(0);
1127 my $pil = PublicInbox::Listener->new($listener, \&accept_dispatch);
1129 pipe(my ($eof_r, $eof_w)) or die "pipe: $!";
1130 PublicInbox::EOFpipe->new($eof_r, \&noop, undef);
1132 $exit_code //= shift;
1133 my $lis = $pil or exit($exit_code);
1134 # closing eof_w triggers \&noop wakeup
1135 $listener = $eof_w = $pil = $path = undef;
1136 $lis->close; # DS::close
1137 PublicInbox::DS->SetLoopTimeout(1000);
1141 CHLD => \&PublicInbox::DS::enqueue_reap,
1149 my $sigfd = PublicInbox::Sigfd->new($sig, SFD_NONBLOCK);
1150 local @SIG{keys %$sig} = values(%$sig) unless $sigfd;
1152 local $SIG{PIPE} = 'IGNORE';
1153 if ($sigfd) { # TODO: use inotify/kqueue to detect unlinked sockets
1155 PublicInbox::DS->SetLoopTimeout(5000);
1157 # wake up every second to accept signals if we don't
1158 # have signalfd or IO::KQueue:
1159 PublicInbox::DS::sig_setmask($oldset);
1160 PublicInbox::DS->SetLoopTimeout(1000);
1162 PublicInbox::DS->SetPostLoopCallback(sub {
1163 my ($dmap, undef) = @_;
1164 if (@st = defined($path) ? stat($path) : ()) {
1165 if ($dev_ino_expect ne pack('dd', $st[0], $st[1])) {
1166 warn "$path dev/ino changed, quitting\n";
1169 } elsif (defined($path)) { # ENOENT is common
1170 warn "stat($path): $!, quitting ...\n" if $! != ENOENT;
1174 return 1 if defined($path);
1177 for my $s (values %$dmap) {
1178 $s->can('busy') or next;
1179 if ($s->busy($now)) {
1185 $n; # true: continue, false: stop
1188 # STDIN was redirected to /dev/null above, closing STDERR and
1189 # STDOUT will cause the calling `lei' client process to finish
1190 # reading the <$daemon> pipe.
1191 local $SIG{__WARN__} = sub {
1192 $current_lei ? err($current_lei, @_) : warn(
1193 strftime('%Y-%m-%dT%H:%M:%SZ', gmtime(time))," $$ ", @_);
1195 open STDERR, '>&STDIN' or die "redirect stderr failed: $!";
1196 open STDOUT, '>&STDIN' or die "redirect stdout failed: $!";
1197 # $daemon pipe to `lei' closed, main loop begins:
1198 PublicInbox::DS->EventLoop;
1199 exit($exit_code // 0);
1202 sub busy { 1 } # prevent daemon-shutdown if client is connected
1204 # for users w/o Socket::Msghdr installed or Inline::C enabled
1206 my ($main_pkg) = @_;
1207 my $exit = $main_pkg->can('exit'); # caller may override exit()
1208 local $quit = $exit if $exit;
1210 umask(077) // die("umask(077): $!");
1211 my $self = bless { oneshot => 1, env => \%ENV }, __PACKAGE__;
1212 for (0..2) { open($self->{$_}, '+<&=', $_) or die "open fd=$_: $!" }
1213 dispatch($self, @ARGV);
1214 x_it($self, $self->{child_error}) if $self->{child_error};
1217 # ensures stdout hits the FS before sock disconnects so a client
1218 # can immediately reread it
1221 $self->{1}->autoflush(1) if $self->{1};
1224 my $oneshot_pids = delete $self->{"pid.$self.$$"} or return;
1225 waitpid($_, 0) for keys %$oneshot_pids;
1226 $? = $err if $err; # preserve ->fail or ->x_it code
1229 sub wq_done_wait { # dwaitpid callback
1230 my ($arg, $pid) = @_;
1231 my ($wq, $lei) = @$arg;
1232 my $err_type = $lei->{-err_type};
1233 $? and $lei->child_error($?,
1234 $err_type ? "$err_type errors during $lei->{cmd}" : ());
1238 sub wq_eof { # EOF callback for main daemon
1240 my $wq1 = delete $lei->{wq1} // return $lei->fail; # already failed
1241 $wq1->wq_wait_old(\&wq_done_wait, $lei);